Setting Up a Band Saw Adjustable
Band Saw Adjustable
Band saw is a fairly common cutting equipment, which is used for processing various materials. Only with the proper preparation and maintenance of such equipment can you count on the fact that it will work correctly and for a long time. To do this, you may need an automatic adjustable saw machine for band saws, which you can purchase or create your own.
Divorce and sharpen saw
When choosing a band saw for organizing production activities by processing wood, a lot of attention is paid to what characteristics the saw has: size, material of the cutting edge, production technology and so on. However, it is worth remembering that, regardless of the type of cutting element, the divorce and sharpening must be carried out periodically.
To begin with, we note that a home-made adjustable saw for a band saw is extremely rare.
This is due to the points below:
- The efficiency of equipment operation depends on the correctness of sharpening and divorce. If the work was not performed correctly, then sawing can take place with quick wear of the teeth.
- It is important to carry out the work with maximum accuracy. Modern models can sharpen and wiring with an accuracy of 0.1 mm. Such high accuracy makes it easier to saw, to make it smoother.
- Depending on the workload of the production line, it is necessary to carry out the procedure with great frequency. Therefore, the adjustable saw for tape saws should work quickly, the whole process is automated if possible, which also eliminates the likelihood of marriage during the work.
Recently, a double-sided adjustable saw machine for band saws of various manufacturers is increasingly being used.
On sale you can find a fairly large amount of equipment that can be used to solve the problem of bringing the geometry of the saw to the correct performance. An example is the Silicon Setting machine or an imported double-sided Wood Mizer.
When choosing equipment, attention should be paid to the following points:
- The country of manufacture. As a rule, imported equipment is more expensive, but its quality is much higher. Among domestic representatives, one can distinguish the Taiga adjustable two-sided machine, which has a relatively low price and high quality workmanship.
- The width of the saw. Each model of Astron or Taiga, another manufacturer, has a range of possible cutting tape widths, which are usually indicated in millimeters.
- There are several types of saw itself. When buying, you should pay attention to the fact that the selected equipment should be designed to work with a tape type of saws.
- The Wood Mizer two-sided adjustable machine can work in manual or automatic mode.
- When considering an adjustable taiga machine or an RWM adjustable machine, you need to pay attention to the principles of work. The most common and popular is the design, which is designed to breed 2 teeth at the same time.
- In addition, when choosing a manual or automatic adjustable saw machine for band saws, attention should be paid to the power of the installed engine. Not only productivity depends on this, but also the cost of electricity. The manufacturer also indicates the mass of the structure, which determines the presentation of installation requirements. A two-sided band saw machine can weigh about 200 kilograms.
Is it worth it to make a home-made adjustable saw for a band saw. A fairly common question.
Note that a home-made version of the design will not have the desired accuracy class, and it means that the work on sharpening and spreading teeth will not be effective.
Adjustment of a band saw machine is carried out depending on the features of its design. If you consider several models of the equipment in question, you can pay attention to the fact that it is structurally different. Some are compact, others have large control units.
Considering how to set up a band saw machine, we note that it is important to consider the width of the saw and the pitch of the tooth, its height. These parameters are taken into account when setting up the equipment in question.
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Machines and devices for the separation of band saws
Band saw. The main part (consumable) of the cutting system of the band sawmill. It is from her that the quality of the cut and the speed of sawing largely depend on it. Proper preparation and timely service
Saw helps significantly add to its service life, as well as provide maximum comfort. Signs of early removal of the saw from the sawmill, reasons and methods for eliminating them: 1. When entering the log, the saw makes a jump up and saws exactly to the end of the log, after which it falls down (“spin”). Unreasonably large rake angle. Reduce the rake angle by a few degrees. 2. At the entrance to the log, the saw makes a jump up and goes along an arc. Also a large rake angle and lack of divorce. It is necessary to reduce the rake angle by several degrees and increase the bore by 0.02-0.03 mm per side. 3. The saw “dives” down and goes along an arc. There is insufficient rake angle and insufficient divorce at the same time. It is necessary to increase the rake angle by several degrees and increase the bore by 0.02-0.03 mm per side. 4. The saw “dives” down and then saws straight. Either a blunt saw or an insufficient rake angle, possibly due to an unfilled abrasive wheel. If the circle is tucked correctly, you should increase the rake angle by several degrees. 5. There are too many sawdust left on the board and they are loose to the touch. There are characteristic scratches across the board. This is caused by too much divorce. Divorce should be reduced. 6. Sawdust on the board is pressed and hot to the touch. Divorce is not enough. It should increase the divorce and reduce the rake angle at the same time. 7. Propyl is a wave. If the saw is sharp, then the divorce is small. It should increase the divorce by 0.1-0.15 mm per side. 8. The saw is covered with cracks in the back. Thrust rollers stand far from the back of the saw blade. Install the rollers according to the “Sawmill Maintenance Manual”. 9. Cracks appear in the tooth cavities on the new saw. Small divorce, or saw dull quickly due to contamination of the log. Increase divorce; clear the log. 10. Sawdust is rolled onto the saw blade. Inadequate divorce. Increase the divorce by 0.1 mm. 11. Sawdust is rolled on the inner surface of the tooth, but this does not happen on the surface of the saw. This is due to poor sharpening quality. Too much metal removal and, as a result, poor surface quality in the tooth cavity. If the sharpening is high-quality, then a large rake angle. Hand over for regrinding. 12. Not a new, refined saw blade covered with cracks in the tooth cavities. Large removal of metal in a single pass, spiked the tooth surface (blueing), or the shape of the tooth does not match the standard. Mold the teeth and grind the blue. Thoroughly fine-tune the teeth. 13. “Fouling” of the tooth surface during sharpening. Too much metal removal, or an abrasive wheel is clogged.
Reduce feed and mold or strip abrasive wheel.
Divorce and sharpening a saw
The most important factor in the success of a sawmill business is which saws are used in production. The size of the saw, the material from which it is made, and the technology by which it is made, matters.
But even the use of saws of the optimum size, produced according to the most modern standards, will not allow you to get the profit you are counting on if these saws are not correctly sharpened and divorced. Improper saw blade sharpening and sharpening lead to defects on the lumber, which means that its cost drops significantly.
If you are just starting your business and have not yet had time to get acquainted with all these nuances, we recommend that you contact those who have been working in the market for more than a year. The telephone number of the central office of the Emerald Forest company in Novosibirsk is 8-800-555-35-15 (the call is free). Contact us and we will advise you on the choice of equipment based on your needs and your budget.
Band Saw Tooth Machines
To set the teeth in increments of 0.5 mm, the ratchet wheel is replaced. The interchangeable matrix 11 is attached to the housing 1 with screws 12 and installed using the stop 13. When installing a new tape, the upper roller is diverted from lower special lever. At 116 strokes / min of the slider and the tooth pitch is 6 mm, the fixture for 1 h cuts the teeth on a 41.76 m long tape. For the productive work of the band saws, the correct tooth spread is of great importance. For the separation of the teeth of band saws, a device is used, the action scheme of which is presented at 14 . The device is driven by the rotation of the flywheel 1, mounted on the crankshaft 2. On the latter are freely located bearing rings in which the curved levers 3 and 4 are fixed to the thread. When the flywheel is rotated, they receive a reciprocating movement. At the end of the lever 3 there is a square with a freely hanging dog 5. When the lever 3 is moved to the right, the dog rests against the tooth of the saw blade 6. With one turn of the flywheel, the saw moves two teeth. The dog and the square are hinged together, so when the lever moves backward, the dog rises and slides along the teeth of the saw. The levers 4 are elements of the mechanism for the separation of the teeth (the second lever is located on the back of the housing). The levers 4 are pivotally connected to the crank axis of the cam 7. The levers return to their original position by the springs 8. When the flywheel is rotated, the levers 4 turn the cams 7, which push the punches 9 towards each other. Two adjacent saw teeth bend in different directions (get divorced). Springs 8 return the cams 7 and punches 9 to their original position. The angle of the teeth is regulated by the nuts 10 and by deepening the threaded end of the levers into rings on the crankshaft. Tooth angle 15 ° in both directions. The feed value of the dog 5 is regulated by the nut 11. The mechanism for installing and securing the band saw has two plates that make up the device body, and the wedge located between them 12. The wedge moves in the case, and the teeth of the saw blade always protrude above the case by a certain amount. At the Volgograd Tractor Plant, a device for spreading the teeth of band saws is used. The device operates from a manual drive and consists of two disks with shoulders on which a band saw is installed. One of the disks is movable for tightening the saw. The divorce is carried out by two cams using a dog, a lever with a roller, copiers, handles and levers. For cutting and divorcing the teeth of band saws, an automatic machine is used . Tooth cutting is performed on a steel tape of any length, which is then cut into measuring tapes. When restoring band saws, teeth are again cut into them. The machine can be installed on a separate bed, table or workbench; its overall dimensions are 380x320x250 mm, weight is 16 kg; it is equipped with an electric motor with a power of 0.37 kW, with a shaft speed of 1400 rpm.
On the plate 1 of the machine (15) two brackets 2 and a support plate 3 are installed. To one bracket mounted supports 4, in which a worm 5 is mounted, bearing ball bearings, and a driven flywheel pulley 6. An eccentric 7 of a pusher 8 of the feeding mechanism and the gear wheel 9 is mounted on the other bracket. The feeding mechanism consists of three supports 10-12, on which the worm is mounted a pair of 13 and 14, a drive roller 15 for feeding the tape blank, a pressure roller 16, a lever 17 of the pressure roller and a screw 18 that controls the degree of depression of the pressure roller. To move the workpiece a step of the saw, a replaceable ratchet is mounted on the worm 5. A drive gear 21 is mounted on the shaft 20, which is engaged with the gear of the cam follower of the feed mechanism, cam discs 22-25, intermediate bushings 26 and 27 and the worm gear 28. A combination stamp (16) is installed on the support bar 3; one of the dies is used for cutting teeth, and the other for divorce; the dies are mounted on the plate 1 between two racks 2 and 3. On the base of the plate 1, two strips 4 and 5 are installed together with the die cutting matrix. There is a clamping device bar 7 between the die cutting die and the guide bar 6. The device is kinematically connected with the punch of the die cut using two rollers 8 and 9 guide strips 10 and 11, between which a spring 12 and a pushing head are inserted. A rubber ring 14 and a metal ring 15 are put on the strap 11, with which the tape is pressed during the cutting of the teeth. For the side clamp of the tape in the hole of the strap 4, a clamping device is mounted. It consists of a latch 16, a clamping bar 17 and a spring 18. The pushing head serves as a guide sleeve into which the spring 19 is inserted. The tape is fixed with a nut 13. The nut 20 of the pushing head rests on the metal ring 15 of the rubber ring 14. To release the tape after cutting and moving a spring 12 serves to a new section, which returns the clamping device to its original position. The punching head of the punch during operation slides along the bronze sleeve 21, pressed into the bar of the struts 2 and 3. Depending on the clamping force of the tape, it protrudes above the bar by one or another size. The stamp for tooth divorce does not have a clamping device.
The punch 22 is inserted at one end into the pushing head 23 and the other into the bar 24. Its position is regulated by the nut 25. A spring 27 is installed between the nut 25 and the guide sleeve 26. The push head of the punch slides along the guide sleeve 28, pressed into the bar 29. Combined stamp set on the stove and close the casing.
To thicken the teeth of band saws, the DIXA apparatus (NDP) is used. The distance between the teeth undergoing thickening is 17 mm, the minimum height of the tooth is 9 mm, and the maximum thickness of the saw is 3 mm. For lateral profiling, leveling and grinding of flattened teeth of band saws, the DHCA-20 (PNR) machine is used.