How to check the divorce of a strip saw. Out of lumber
Correct divorce and sharpening of a strip saw. half of success!
The divorce process is considered an operation associated with bending the saws of the saw in different directions in order to reduce the friction of the saw tape on the side surfaces of the cut and eliminate its clamping. For the free movement of the canvas in the wood, it is necessary to provide the width of the cut, which exceeds the thickness of the canvas, by at least 30-60%. The wiring is divided into several types, and they have no established names, since the manufacturers of the saw call them differently.
Standard wiring characterizes alternate bending of teeth different sides.
When cleaning wiring, the teeth of the saw canvas are divided, two of which are bent in different directions, and the third remains in place.
It is mainly used when working with solid wood species. The trapezoidal shape of each third tooth remaining in the center of the saw sets the direction of the entire saw tape.
The most difficult to execute is wavy wiring, since each subsequent tooth in the half.wave is bent to an increasing value.
With any type of wiring, the tooth is bent not from the base, but with the indentation from it by 33-67% of the height of the tooth. Despite the fact that each manufacturer dictates its requirements for indicators related to divorce, all of them do not go beyond 0.3-0.7 mm.
It is generally accepted to cut trees with soft wood with tape saws that have a large divorce, and with solid. small. But in any case, the divorce should be such that the sawing occurs without the formation of a cut wedge in the center.
All teeth during a divorce should bend into the same value with the permitted error up to 0.1 mm. If the wiring is unequal, then the saw will be pulled in the direction of the larger divorce.
Installation and adjustment of guide rollers
Before installing and adjusting the guide rollers, it is necessary to check how worn out the details of the roller.
First, whether there is a video beating, it is enough to chat a video to determine it. In the case of even the slightest beat, bearings or shaft are replaced, and there may also be wear of the inside of the video.
Secondly, the surface of the video should be even as in width, usually during operation it wears out under the cone, which greatly affects the quality of the material. And in diameter, the video should not be ellip.
After assembling the guide roller and checking it, we start installing it on the machine. We insert the shaft into the video holder and fix it with a special bolt, if the holders are on hairpins, and an eccentric is fixed with several bolts.
For further adjustment, put the saw tape and produce a weak stretch so that the tape presses to the rollers. We loosen the bolts fixing the roller shaft and move the video so that the distance from the front of the video to the base of the tape tooth is 3-5 millimeters, and again fix the roller shaft.
Then we set the level that should be at least 120 cm, on the lower part of the frame and measure from the leading wheels to the level, and then from the guide rollers to the level. The rollers should be 3-5 mm below the drive wheels.
With the help of studs, set this distance by unscrewing or pulling up with nuts. On eccentrics, weaken the fixing bolts and set the required size by turning the shaft and fix the roller shaft again.
Next, we make a full stretch of the saw tape according to the instructions, the tension of the tape should be minimal, but sufficient for work. We take a small level and put it across the ribbons between the rollers, while paying attention to the protruding teeth of the tape, the level should not stand on them, and also with hairpins or bolts, align the tape to an even state, moving the level from one video to another.
After all these manipulations, roll the sawmill to the first stubborn rack and set the size. This will be easier to do if the size, for example, is 10 cm first between the tape and the guide stand, while it is unforgettable, what needs to be measured from the teeth protruding down, and then just unscrew the line fasteners on the frame and set the size on the line.
We check all our adjustments, making control measurements, as well as the reliability of the fixation of the rollers, and produce a control cut, if the cut showed the quality and accuracy of the size of the material, then all the adjustment of the guide rollers was correctly made. In the future, it only remains to support these adjustments, timely eliminating the malfunctions of the details of the roller.
Three distinctive features are characteristic of strip saws. They are made only of special varieties of instrumental steel, which provides high indicators of strength and wear resistance of teeth. Manufacturers usually use steel of 9XF and B2F categories, foreign companies prefer the C75 series. In any case, the hardness of the material should be at least 45 HRS.
The width of the cutting of the canvas of the tape saw is much already already than that of disk analogues. As mentioned above, this is a fundamental factor in the processing of valuable wood and business wood.
Saws can easily cope with blanks of any length and diameter. At the same time, a properly sharpened strip saw provides high production productivity.
It must be clarified that the reliability of closed saws is explained by the heterogeneity of the material that is used to make the canvas.
In particular, the body of a saw instrument is usually made of spring steel, which has incredible resistance to stretching and dynamic loads. Varieties of steel with a high molfram and cobalt go to the manufacture of the cutting edge. Individual parts of the canvas are welded to each other with high.frequency currents. Tools made using this technology can be used to saw metal.
Materials and their characteristics
Before starting work, you should know why the strip saw (tape) is used, what materials are used and what parameters should be withstanded when sharpening the ribbons of ribbons.
Ribbon saw is a specialized tool for cutting wood in special machines. The canvas of such a tool is a closed ribbon that can have teeth or a flat sharp cutting edge (undersized). Such woodworking inventory makes very neat and very thin cuts, which allows them to be used for finishing work, work with valuable wood, as well as in order to make both longitudinal-transverse saws and cuts at any angle and in any plane of the material. Their advantages include a high speed of material processing, a high service life of the cutting edge and the accuracy of the cut line. In order for the saw to always be ready for use, as well as for high.quality cut, it is necessary to constantly undermine the cutting edge, and if it is wear, to make full sharpening.
Which equipment to choose for sharpening saws?
It has been proved: over 80% of cases of the rupture of the tool occurs due to non-compliance with the rules for sharpening tape saws. The need for manipulation is determined visually. by the type of teeth or the condition of the walls of the cut (an increase in surface roughness).
Circles for sharpening tape saws are selected depending on the hardness of the teeth. To sharpen tools made of instrumental steel, they turn to corundum circles. Bimetallic saws require diamond or borazon samples. The shape of the sharpening circle for strip saws should be determined based on the parameters of the tool. It can be profile, cup, flat, plate.
Before starting work, it is recommended to allow the saw to sag in a turned out to be ten to twelve hours.
Requirements for sharpening tape saws with your own hands:
ensuring uniform cutting of the metal by tooth profile;
the exclusion of excessive pressure of the circle (this can lead to anneal);
ensuring the safety of the height and profile of the tooth;
mandatory presence of coolant;
Standard instructions for sharpening tape saws states that sharpening should be carried out either on the front surface of the tooth, either on the front and back. But this is a theory. In practice, many professionals, and the people’s craftsmen “perform” it exclusively on the back surface. so, in their opinion, more convenient.
In general, despite a lot of rules and requirements, these tools are quite unpretentious in terms of sharpening. You can work with them both using a special sharpening device for strip saws, and manually; apply circles different in shape and material for processing.D.
Before you sharpen the strip saw, you must familiarize yourself with the main methods of this operation.
Is the highest quality, produced on an automatic machine. The Elbor Circle, precisely selected in shape, with one movement passes the entire interdental cavity along with the corresponding surfaces of neighboring teeth. Obtaining angular shapes at the base of the teeth at the same time excluded. The only drawback of such sharpening is the need to have a certain number of circles for “diverse” saws at a constant disposal.
Can be carried out on a professional machine or manually.
If the preference is given to the machine, then, again, you should competently choose a circle. usually these are flat samples. In general, it is recommended to contact a specialized solid equipment only in cases where the volume of work is quite large. Episodic “home” manipulations are best done manually. using an engraver or on a regular machine. When working for security purposes, you should definitely use a mask or protective glasses.
If there is no machine or engraver in your arsenal, then you can sharpen the strip saw and the usual grandfather method. by wielding a file. Three or four confident movements on the rear or front face of each of the teeth-and the point, as they say, is “in the hat”. With regular and diligent performance, the skill of high.quality manual sharpening will appear quickly.
In the case of sharpening the strip saw through the machine, before starting work, it is necessary to make sure that the position of the sharpening disk relative to the tool.
It is very important to remove such a amount of metal from the sinuses that all microcracks are guaranteed to be eliminated.
If the tool “functioned” without quality service longer than the manufacturer allowed, the amount of metal removed in one sharpening should be increased.
To check the sharpening results, always use a new tool as a standard.
Form of the saw tooth. a parameter developed and verified for years. Therefore, to hope that the tool will saw “like clockwork”, regardless of what you “do” with teeth is a huge misconception.
Subject to operational requirements, the strip saw will serve you in the conscience until its width decreases to a number equal to 65% of the initial value. The width is reduced, of course, in the process of the re.placement.
There is a completely absurd recommendation that there is no particular need to remove burrs after processing. If you “listen” to it, then the appearance of microcracks in the canvas is guaranteed.
After operation, the strip saw should be immediately cleaned of tar and sawdust, and before sharpening. a thorough inspection. Otherwise, the risk of clogging of the sharpening discs is extremely high. And this inevitably entails the “hack” of the sharpening procedure.
Divorce and sharpening of a strip saw
The most important factor in the success of the business for logging is what saws are used in production. The size of the saw and the material from which it is made is important, and the technology according to which it is produced.
But even the use of saws of the optimal size made according to the most modern standards will not allow you to get the profit that you are counting on if these saws are not correctly sharpened and divorced. Incorrect divorce and sharpening of saws lead to the appearance of defects on the lumber, which means that its cost is significantly falling.
Correct sharpening and divorce dragged when working on a strip sawmill is especially important. Unfortunately, in practice, many even confuse the sequence of these procedures: first they breed a saw, then they drag. As a result, the divorce of the saw tooth “leaves”, and the saw must be diluted again, or if this is not done, the quality of the finished product will leave much to be desired.
If we talk about the machines on which the sharpening and divorce drank, then every detail is really important here. The company “Emerald Forest” contributed to the development of high.quality divorce and sharpening devices.
Small adjustments are distinguished by thin adjustments, which allows you to adjust the supply size with an accuracy of 0.1 mm. Almost all the sharpening machines that exist today on the market are dragging any one specific step of the strip saw. The machine allows you to sharpen 19, 22, 25 step, which is its significant advantage.
Another distinguishing feature of the machine. it does not give a quenching to the tip of the tooth of the saw, because otherwise the tip of the tooth when entering the log falls off, as a result there will be a wave. The machine allows you to drag saws up to 7 m. In case of failure of any electric engines, mechanisms, buttons, components can easily be purchased in a car store.
Modern tape saws. durable and at the same time elastic. Despite these undoubted advantages, the value of the correct divorce of the saw is difficult to overestimate, because the quality of the collapse of the saw tooth directly affects the quality of the resulting lumber.
The divorce machine has the correct geometry: when installing a saw in a divorce machine, the root of the tooth is between the cheeks that clamp the saw. In many other machines, including a number of well.known manufacturers, this condition is not met. Therefore, when the tooth is bent, both the tooth and the body of the saw occur. The technically correct divorce of the saw implies something else: the pusher rests on 1/3 of the tooth and only its tip bends.
In the manufacture of a divorce machine, two clamping stops are used, which, with a slight pressure on the handle, press the tooth to the indicator head. The pusher, not reaching the tip of the tooth, shows the actual divorce on the strip saw. If it is insufficient, then the operator presses the tooth until it is divorced to the required size. We consider it very important to pay attention to one moment: the tooth of a tape saw has a property like a metal memory. Because of it, under the influence of inertia, the tooth seeks to return to its original position. Therefore, for proper wiring, it is not enough to make one press on each tooth: it is necessary to influence the tooth several times so that it remembers its position. If someone tells you that it is enough to press each tooth once once, know: you are misleading.
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Two clamping stops with powerful springs used in the machine show the actual divorce of the saw tooth, which is very convenient: you do not need to endure endlessly and connect the pusher again to find out how the saw tooth is allotted by fact.
The divorce ladder is one strong side of the company’s divorce production. the lightness and safety of the operator: the tooth divorce does not occur by pressing the pusher operator forward, as in a number of analogues, but due to the operator’s own weight and with the help of an eccentric. As a result, the operator does not have sprains of the hands.
So, high.quality divorce and sharpening machines. what, of course, should be in the arsenal of each owner of the sawmill. But in themselves, they do not guarantee the qualities of lumber, will not allow the saw to serve for a long time if sawmills that have serious technical disabilities are used in the production.
For example, if the rollers are made by cone, or they became conical, because the saw was stolen, then even with proper sharpening and wiring, the saw begins to look for her place in the log. This will happen because the videos are leaning. If the pulleys are divorced on the sawmill and are not in the same plane, then the saw is collapsed not clearly in the middle, but from the sides, and then the tension goes to the edge of the tape canvas. It also reduces the service life of the saw.
So the role of proper wiring and sharpening of the saw is, of course, great, but these factors do not determine 90% of high.quality sawing, as is commonly believed. It’s just that the saw itself will not be able to cut perfectly evenly and not fail for a long time, if, for example, a hard tension is used on the sawmill.
If you are just starting your business and have not yet managed to get acquainted with all these nuances, we recommend that you turn to those who have been working on the market for several years. Phone of the central office of the Emerald Forest company in Novosibirsk: 8-800-555-35-15 (call free). Contact. and we will advise you about the choice of equipment based on your needs and your budget.
To inhabit the teeth with a step of 0.5 mm, the ratchet is replaced. The interchangeable matrix 11 is attached to the case 1 screws 12 and installed using stop 13. When installing a new tape, the upper roller is diverted from the bottom with a special lever. At 116, the slope of the slider and the step of the teeth of 6 mm, the device per 1 h inhabit teeth on a tape 41.76 m long. For the productive operation of tape saws, the correct divorce of the teeth is of great importance. To divorce tape saws, a device is used, the scheme of which is presented at 14 . The device is driven by rotation of the flywheel 1, fixed on the crankshaft 2. On the latter are freely located rings-bearings, in which curved levers 3 and 4 are fixed on the thread.
When the flywheel rotates, they receive reciprocating movement. At the end of the lever 3, a square is installed with a freely hanging dog 5. When the lever moves 3 to the right, the dog rests on the tooth of the saw blade 6. With one turn of the flywheel, the saw moves on two teeth. A hinged dog with a horned is fastened, so when the lever is revealed, the dog rises and slides along the teeth of the saw. Browns 4 are elements of the teeth divorce mechanism (the second lever is on the back of the case). Brokes 4 jointly connected to the crank axis of the fist 7. The levers are returned to the starting position by springs 8. When the flywheel rotates, the levers 4 turn the fists 7 that pushes the punch 9 towards each other. Two neighboring teeth of the saw bend in different directions (divorced). Springs 8 return the fists 7 and punch 9 to its original position.
The angle of divorce of the teeth is adjusted by nuts 10 and using the threading of the threaded end of the levers in the rings on the crankshaft. Tooth divorce angle 15 ° in both directions. The size of the dog 5 is regulated by a nut 11. The mechanism of installation and fixing of the strip saw has two plates that make up the device case, and the wedge 12 between them. The wedge moves in the case, and the teeth of the diluted saw always protrude above the body for a certain value.
At the Volgograd Tractor Plant, a device for wiring tape saws is used. The device works from a manual drive and consists of two discs with bundles, on which a strip saw is installed. One of the discs is mobile for a saw tightening. Divorce is carried out with two fists with a dog, a lever with a roller, copiers, handles and levers.
For cutting and divorcing teeth of tape saws, an automatic machine is used . The teeth are cut on a steel tape of any length, which is further cut into measuring tapes. When restoring the strip saws, the teeth are cut again on them. The machine can be installed on a separate bed, table or workbench; Its overall dimensions are 380x320x250 mm, mass 16 kg; It is equipped with an electric motor with a capacity of 0.37 kW, with a shaft speed of 1400 rpm.
Two brackets 2 and supporting bar 3 are installed on the plate 1 machine gun (15). Supports 4, in which a worm 5, carrying ball bearings, and a led pulp of a flywheel 6 are installed, are installed to one bracket. On another bracket, an eccentric 7 pusher is mounted 8 feeding mechanism and gear 9. The supply mechanism consists of three supports 10-12, on which the worm steam 13 and 14 is placed, the leading video 15 to serve the harvesting of the tape, the pressure roller 16, the lever 17 of the pressure roller and the screw 18, which regulates the degree of pressing the slide roller. To move the workpiece by a step of the saw on the worm 5, a reputable ratchet 19. The leading dentate wheel 21, which is engaged in the gear with a gear wheel, the eccentric pusher of the supply mechanism, the cams 22-25, intermediate bushings 26 and 27 and the worm wheel 28 are installed on the shaft 20. A combined stamp is installed on the support bar 3 (16); One of the stamps serves to cut the teeth, and the other for a divorce; Stamps are mounted on plate 1 between two racks 2 and 3. Based on the plate 1, two and 5 strips are installed along with the matrix of the cutting stamp. Between the matrix of the cut stamp and the guide bar 6 there is a bar 7 of the clamping device. The device is kinematically connected with the punch of the cutting stamp using two rollers of 8 and 9 guide strips 10 and 11, between which the spring 12 and the pushing head are inserted. A rubber ring 14 and a metal ring 15 are put on the bar 11, with which the tape is pressed during deforestation. For lateral pressing the tape in the hole of the plank 4, the clamping device is mounted. It consists of a latch 16, clamping plank 17 and spring 18. The pushing head serves as a guide sleeve, into which the spring 19. The tape is fixed with a nut 13. Nut 20 pushing head rests on a metal ring 15 rubber ring 14. To release the tape after cutting down and moving it to a new section, a spring 12, which returns the clamping device to its original position. Poanson pushing head glides along the bronze sleeve 21, pressed into the bar 2 and 3. Depending on the strength of the clamp of the tape, it protrudes above the bar for one or another. The stamp for a divorce of teeth does not have a clamping device.
Punch 22 at one end inserted into the pushing head 23, and the other into the bar 24. Its position is regulated by a nut 25. Between nut 25 and the guide sleeve 26, a spring 27 was installed. Poanson’s pushing head slides along the guide sleeve 28, pressed in the bar 29. The combined stamp is installed on the stove and covered with a casing.
To thicken the teeth of tape saws, the DIXA (PNR) apparatus is used. The distance between the teeth subjected to thickening, 17 mm, the minimum tooth height 9 mm, maximum saw thickness 3 mm. For lateral profiling, alignment and grinding of flattened teeth of tape saws, the DHCA-20 (PNR) machine is used.
When choosing the technology of sawing logs on the boards, the characteristics and sizes of wood are taken into account. There are three ways to work on a strip sawmill:
- Sawing in collapse. The tree is sawn in a straight line to the end without a coup. Unscrew boards are obtained at the exit. The disadvantage is the low quality of the resulting material and a large amount of waste. The received boards must be additionally trimmed. During operation, there is a high probability of cracking them.
- Sawing in a circle. After the first cut, the log turns over to another line. Usually five coups practice. The method allows to cut logs in size with a minimum waste. As a minus of this method, a low production speed can be distinguished.
- Form sawing. The main part of the sawing logs is carried out in a circle. The central part is cut in the form of a beam. For these purposes, as a rule, the largest logs are used.
The technological process of the cut includes the size of the board and turn the log.
Turn the logs
After the canvas of the sawmills has reached the mark of the desired height, the barrel is turned over. Unstable material is measured, calculations are made to use it. Next, the log is rotated by 900 and repeated measurements. In calculations, it is important not to forget to make allowances for the saw.
The first drank
There are two options for the beginning of the cut of wood depending on the chosen edge:
- Start sawing from the worst part. In this case, you do not need to take into account the tilt of the barrel. When sawing this face, boards of small length and a large amount of unrealing material are obtained.
- Start sawing from the best part. In this case, the log must be installed so that the saw is located parallel to the bark of the tree.
Since in the first version the best part of the trunk is hidden, with further sawing, errors are possible. This method is more suitable when working with low.quality wood.
Boil of logs
In the process of working on a sawmill, the log is turned over according to the cutting scheme. The coup is carried out in two ways:
Using the first method, you can get wider boards. The second method is more convenient, since it is easier to turn the log from this angle.
For a divorce, there are special divorce devices that are characterized by a wide variety and functional capabilities. Today, many experts are appreciated by the device for wiring “cedar” for its reliability, simplicity and ease of work, as well as a low price.
It is a manual machine that provides a wiring accuracy of 5 μm. The machine is equipped with special supporting racks to facilitate its use. The presence of an hour.long type indicator on the machine, the wiring accuracy increases as much as possible.
The carefully thought.out design of the Kedr divorce device provides a productive and efficient use of the entire saw resource set by the manufacturer. It can be easily configured for the necessary divorce parameters to ensure the optimal saw width. As a result, you can do with a lower engine power, t. to. friction forces are reduced when sawing.
This divorce machine easily and simply provides wiring in which the resistance of sawing is minimal.
Each of the wood of the tree has a characteristic rigidity. Depending on this characteristic, the pitch of the drain of the saw should vary. For hard breeds, the step should be less.
Despite the obvious advantages of this machine over other devices of a similar purpose, it has an affordable price, which also contributes to its increasing recognition in the vastness for wiring the cedar tape saws has the following technical characteristics:
Recall about simpler devices for divorcing saws. Their use for strip saws is fraught with low accuracy and great labor capacity. Their use is justified only in the absence of special devices.
The right choice of the type of sharpening circle is important. It must correspond to the steel brand from which a strip saw is made. Corundine circles are used for instrumental steel structures. If you need to improve the cutting properties of bimetallic models, you should use elborus or diamond circles.
Depending on the technical capabilities, it is possible to perform full.profile processing or each cutting part separately. In the first case, you will need an elbox circle, the end of which has the same shape as the saw. For the second option, each tooth is processed.
Previously, you will need a machine. It should have the functions of regulating the speed of the disk and a change in its location relative to the tool. After fixing the canvas in a special bed, such actions should be performed according to the following instructions.
- The emery goes down. At this time, the front edge with the cutting edge is processing.
- Cutting in Padin. This is done without separation from the canvas. This stage allows you to remove microcracks and unevenness. An important point is a decrease in surface tension, which is the main cause of deformation of the canvas.
- The circle moves up. The back of the tooth and its cutting edge are tinted.
According to the same technique, all other teeth are updated. It is important that the values of the angles of the entrance and exit are everywhere the same. Otherwise, with the differences of geometry in one of the parts, operational qualities deteriorate.
After the processing is completed, it is recommended to finish. treat the surface with fine.grained emery. During this process, the geometry of the canvas should not change.
With prolonged contact of the circle with the metal, the temperature on the surface of the latter may increase sharply. To eliminate this effect, special coolants come directly from the machine. The feed is carried out constantly to avoid the formation of the intensity zone. In this part, the mechanical strength will be worsened.
In order to avoid the appearance of Zazubrin before processing wood, you need to check the presence of metal components in it. Particular attention is also paid to fixation and uniform handling for sawing.
In the video, you can familiarize yourself with the recommendations for amateur sharpening:
In a cycle of articles on tape sawing, we already talked about the problem of proper adjustment of the saw process, gave detailed recommendations for the purchase of machines for sawing logs, ribbon-leading machines for the production of epaulets or tape-fed machines for a furniture enterprise. We also talked in detail about the new method of sharpening tape saws. In this article, we will consider the second part of the preparation of the strip saw for work. the process of wiring its teeth.
Wiring the teeth of the strip saw, despite the apparent simplicity, turns out to be the most severe process, since after the end of the divorce, accuracy cannot be checked in the appearance of the saw, and the quality of the surface of the lumber mainly depends on how accurately it is made.
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Having visited so many sawmills, I can confidently say that more than 90% of the wave during sawing arise precisely due to poor-quality wiring. Uneven (jumping) dentist, divorce of teeth is not broken, but along the radius or below 4 mm from the top of the tooth, a divorce with a unequal value on both sides of the strip saw or simply incorrectly chosen divorce leads to the instability of the saw in the puncture. Another 5% are sawing with dull or initially poorly sharpened saws, and the remaining 5% are obtained with improper settings of sawmills.
First you need to refute an almost universal misconception that it is easy to cut a tree with a tape saw. this is not iron. In fact, everything is just the opposite. At those speeds of the saw on the pulleys, such a large supply during the cut and significant unevenness of the density of the wood itself along the entire length of the log (knot), the saw can maintain a straightforward movement only with very high.quality preparation.
Often our clients, when we show them how to properly breed a strip saw, they say, is there a difference for sawing from how accurately the divorce of the drain of the saw is made. with the admission of the indicator into one division, that is, ± 0.01 mm, or 10 indicator divisions, that is, ± 0.1 mm, because even the difference is not visible by eye, which means that for the saw it does not matter. Only after we showed them in a microscope the size of dulling the cutting edge, in which the saw begins to lose stability in the propyle, that is, earned. They began to understand that there is no difference for the eye, and for high.quality sawing the difference is very big. It was repeatedly verified by us on different sawmills. Regardless of the time of operation or sawed volume of the pilot, the strip saw was removed from the sawmill at the first appearance of the wave. About the same results were obtained everywhere. The minimum dulling of even part of the cutting edges of the teeth of the saw only by 0.05-0.07 mm, which is equivalent to a decrease in the divorce by five to seven indicator divisions, already leads even on medium-sized excess forms. Those who worked on tape machines, sawing metal, know very well that round rental, especially steel 3, can be sawed with a saw, in which the cutting edges are simply demolished.
It’s not about the sharpener
A good divorce machine is a purely technical problem. The apparent simple appearance of the machine misleads many manufacturers. They think that it can be very easily done. When you look at those machines that the sharpeners are trying to breed their ribbon saws in the field, it seems that almost all of their manufacturers absolutely do not understand how, in fact, the machine should work and strive to make its design to the maximum, and, accordingly, for better sale, And reduce the price. And the problem, which is that it is not possible to properly breed such divorces is explained by the fact that we must look for a good sharpener. But the point here, as with the grinding machines, is not in a good or bad sharpener, but in the fact that such divorce cannot be well diluted with a saw in principle. The entire mechanism dangles, some of the main parts of the machine are simply absent, the parallelism and perpendicularity of the ends of the stops and planes of the plates are not observed, the body of the saw cannot be squeezed well. Thus, instead of a tooth divorce, you get the effect of “swing”. The pusher presses on the tooth, but instead of the deviation of the tooth, the body of the tape saw begins to bend (this bending will be only 0.3-0.7 mm, rarely more, completely invisible to the eye), and the body will bend differently, and it will bend differently, and So, all teeth will bend with the same indicator of the same values on an absolutely unpredictable value.
The only truly automatic divorce machine is made by Wood-Mizer. The divorce of each tooth is carried out on one side of the saw with a pneumatic trapel by several blows adjustable in strength with constant control of the electronic micrometer of the actually obtained divorce. The next tooth for a divorce by the pusher will be automatically supplied only after the indicator shows the set value. After the divorce ends, the machine stops. Then the saw is removed from the machine, turned out, installed again on the machine, and the divorce is made on the other side. The machine would be very good if it were not for him, which is unjustified even for service centers, not to mention simple sawmill. And although representatives of Wood-Mizer claim that they sell these divorce machines, I personally have never met them in work and saw only at exhibitions.
Ribbon saws are a special continuous design, which is characterized by the presence of cutting elements on one side. This is a cutting element with which wood work is carried out. Most often, tape saws are used in a variety of tape fiber canvases. With their help, the cutting of various details is carried out. With the help of these paintings, a fairly high cut quality is provided. All this is provided only if the saw has a good divorce. Also, the tool must be served in a timely manner.
Ribbon saws are made of super.strength metal, which provides not only high cut quality, but also the duration of the saw of the saw. Teeth have a universal angle, which allows the most qualitatively carried out the sawing of the material.
Design features of strip saws
note! For the machine to always work stably and efficiently, you should approach its maintenance extremely responsibly. Sharpening and wiring of tape saw on wood should be carried out in a timely manner and competently.
Profile, teeth and angle of sharpening
International classification of teeth profiles.
Ribbon devices have different geometry of cloves, which depends on the type and characteristics of the cut materials. Tool for wood can be carpentry and dividing. There is a third type designed for sawing a beam, logs. All these subspecies have their own parameters and the shape of the cloves.
The angle of sharpening of tape saw on wood is selected by the manufacturer based on several points. The main of them is the more firm, the more the front angle should be smaller. Below is a table with the main saw parameters.
Preparation of the device for work
During the constant use of the tool, it is inevitable to lower the quality of the cutting edge. It is blunting, and the width of dentist is reduced. Based on this, the sharpening of the saw on wood and its wiring are the necessary components of the maintenance of the tape.saw machine.
It should be noted that the wiring of the teeth should be carried out before they are sharpened, and not vice versa.
Warring the tool
Wiring is the process of bending the cloves on the sides. This operation is needed so that the saw blade does not clamp in the workpiece, as well as to reduce friction during operation.
note! When carrying out the wiring, not the entire clove should bend, but only a third or two.thirds from the top. Producer companies advise to carry out the operation so that the bending range will fit in 0.3-0.7 millimeters. Work is done using a specialized diluting tool.
Sharpening of the saw
Before sharpening a saw disk or a strip tool, keep in mind that more than 80% of the incidents with damage to devices (including their gap) occur due to non.compliance with the norms of work.
Sharpage of the saw on wood should take into account the following provisions.
Pay attention! Theoretical instructions for sharpening tape saws on wood notify that it should be carried out either on the front side of the teeth, or both on the back and front. In real life, most experts and amateur masters perform the operation only on the back side, t.to. This is more convenient.
Boil of logs
If the rotation is made at 180 degrees, unreasonable boards are obtained, requiring additional processing from the sides, and then the semi.Bus is sawn on a finished board.
Adjusting Miter Saws For Accurate & Square Cuts
For the efficiency of the cut, the log should be turned over 180 degrees
With a rotation of 90 degrees, non.elaborate and semi.earned boards are obtained with the need to pruning from one side. The sawing method with a coup of 180 ° degrees will give more more valuable wide boards. But if the edge for cutting the edge is equipped with only one saw, the coup of 90 degrees is convenient.
After the cut of the opposite faces, the worst of the remaining ones is the first to cut, but this option does not take into account the cone. But high.quality faces need to be sawn parallel to the bark, which increases the output of high.quality lumber.
Common errors and methods of correction
The masters know a number of situations that negatively affect the process of processing the material.
At the entrance to the material, the saw jumps up, but then it works normally, the power falls at the end. The cause is often a large angle of sharpening of the teeth, it must be reduced by 5 degrees.
Entering wood, the saw rises, then the masters receive a curve board. The reason is the angle of sharpening exceeds the norm, and the wiring is insufficient. It is necessary to increase the angle of sharpening by 4-6 degrees, and the divorce is slightly increased.
After dives, the saw goes smoothly, the sawing man is called several reasons: the blower of the cutting canvas, the small angle of sharpening. If the shape of the tooth corresponds to the standard, it is necessary to increase the angle of sharpening.
The saw goes with constant dives. Small angle of sharpening with insufficient wiring.
A large number of sawdust on the surface of the boards, the wiring of the teeth is increased.
Sawly sawdust and compressed. underestimated divorce.
Drink it in the form of a wave. If the saw was quite acute, then the wiring is insufficient. Too small wiring sometimes leads to a break of the saw tape.
The canvas cracks at its rear edge. The rear stops of the rollers, in them lies a log, are far from the rear edge. It is necessary to set a distance of less than 0.3 mm.
Flipping sawdust on the saw blade. Little teeth wiring, you need to increase the divorce.
Rolling of sawdust on the inner surface of the tooth, they are not on the canvas. Bad sharpening of teeth (high feed speed, excessive removal of metal). Additional reasons. the angle of sharpening is great, the saw was used after the cloth is blown up.
After sharpening at the tooth hollows, the canvas cracks. The geometry of the tooth or the stone for sharpening is disturbed or carelessly refueling.
Choosing a strip saw
Proper wiring of saws
Technical Director of the Wood-Mizer plant Daryush Kuyava talks about the features of wiring tape saws.
I want to draw your attention to typical errors that arise when wiring tape saws.
The position of the grotto of the divorce device, the height of the grotto of the divorce device determines how correctly the tooth is divorced, and also prevents the twisting of the tooth or the chiz of its cutting edge, which in turn affects the quality and accuracy of the saw, and the durability of the saw.
The pictures show cases of the incorrectly adjusted position of the grotto of the divorce device.
The correct position of the grotto.
The grotto is located too high.
The grotto is located too low.
The grotto is located on the cutting edge, which leads to its destruction and to twist tooth.
The next error occurs as a result of wear of the clamping screw in the divorce device. The bend of the saw is clearly visible, which is why a wave is formed during sawing. Therefore, it is important to check the condition of the screws of the divorce device.
To avoid these errors, you can use the Re-Sharp service program, which is proposed by our regional representatives (list of addresses on www.Woodmizer-Moscow.ru).
Our many years of experience, qualifications of specialists, as well as professional equipment guarantee the highest level of sharpening and wiring saw. This will not only save you from problems with saws and improve the quality of sawing, but will also allow you to focus on the sawing, without distracting the additional operations of the preparation of saws.
Here’s what the saw should look like when the clamp and the sensor are correctly adjusted, and the grotto of the divorce device is put to the proper height. Result: all angles are symmetrical.
The next illustration shows a typical error associated with improper reversing the sensor. In this case, the saw will always dive in the direction in which the teeth are bent.
This is how the saw, prepared in the following priority: sharpening, wiring, second sharpening. This procedure for preparation is recommended by Wood-Mizer.