Steel Band Saw Band Wood

Design and parameters of saws. Band saws for sawing wood on joinery and dividing machines are made according to GOST 6532–77, and for sawing logs and beams according to GOST 10670–77. A band saw is a blade with a serrated edge, connected by ends to a continuous tape. The saw blade is characterized by thickness S, width B and length L.

The choice of thickness of band saws is determined by the stresses that occur in the blade during operation: from centrifugal forces, bending on pulleys, tension; cutting resistance forces; heating the blade in the cutting zone; pulley inclination, etc.

With a decrease in the thickness of the band saw, the waste of wood into sawdust is reduced by reducing the width of the cut, however, this increases the likelihood of loss of stability of the saw in operation.

Band saws are made of alloy steel grade 9HF, 65HF and U10A narrow carpentry saws. The hardness of the blade HRC3 41. 45. The teeth of the band saws are bred, flattened and fused with stellite.

Preparation drank to work. When preparing band saws for work, the following operations are performed: marking and trimming the tape along the length; connection of the ends of the tape (6.5); dressing and rolling; sharpening and grinding teeth (flattening and grinding of teeth); installation of saws in the machine. The tape is marked on a workbench, the tape is trimmed with scissors, the ends of the tape are joined by soldering or welding. Soldering is a more time-consuming and older method. It is carried out in the absence of welding machines. The width of the joint for soldering s = 8.12 mm. The bevel of the tape edge is selected taking into account the direction of rotation of the pulleys. The chamfers at the ends of the tape are removed on the chamfering machine with an abrasive wheel, and brought manually by a file. Chamfers must be flat. Soldering is done in presses with solder bars made of heat-resistant steel. The temperature of the heating of the bars: with silver solder. 830.900 ° С, with copper-zinc and brass solders. 950.1000 ° С. In electric soldering presses, the heating temperature can be adjusted. After soldering, the connected ends of the tape should be released by heating red-hot solder bars for 1.2 minutes, until the upper side of the saw acquires a straw-colored discoloration. After the holiday, the band saw cools freely in the air.

Butt welding of the ends of the tape is carried out on welding consumables (regattas: ASLP18, ASLP35. After welding, the junction in the unit is tempered to give the sheet the necessary hardness and toughness. The seam after the ends are joined is cleaned and evened according to the thickness of the sheet.

The divorce and flattening of the teeth provides a broadening of the serrated edge of the saw relative to the thickness of the blade. For carpentry saws, the bend per side is mm, for dividing mm, for saws for sawing logs 0.6. ! 0.7 mm The broadening of the saw teeth during flattening is recommended jj mm. The accuracy of the divorce and conditioning is controlled by an indi- cator divorcemeter or template. Deviations of divorce or flattening of saw teeth are allowed ± 0.05 mm.

Sharpening of the teeth of band saws is performed on TchL machines with corundum circles of a flat 45 ° conical profile j (ZP) with a grain size of 40.25 on a bakelite (B) bond of hardness 3 CI — CT1. The thickness of the circle is steps j teeth. Good quality is ensured by the following mode of the j-point: circumferential circle rotation speed of 20.25 m / s; infeed feed in one pass (up to 0.1) mm; the number of passes 4.6 (up to 7). ‘j

The finishing of the teeth consists in grinding the front and rear faces with a fine-grained donkey fixed in a special holder. The resistance of the saw with finished teeth increases by 15.20%. The refinement is carried out using a manual device.

Editing a saw. the operation of eliminating defects in the blade by striking the correct hammer on the saw on the anvil. Defects are detected during the operation of the saw by slipping the tape from the pulley and beating it in the cut; in the free state, by the light gap between the blade and the straight edge and twisting (by eight).

Rolling is an operation, as a result of which preliminary internal stresses are created in the saw blade (before installation in the machine), increasing the lateral stiffness of the saw created by tensioning it on the pulleys of the machine. With symmetrical rolling, three to five tracks are grooved in width from the middle to the edges: the extreme tracks are at a distance of 10.15 mm from the line of tooth cavities and from the rear (rear) edge of the saw. The correctness of rolling is controlled by transverse curvature (deflection arrow on the width of the tape) with a special template. The deflection boom of a normally-milled saw is 0.15 for cylindrical pulleys of the machine. 0.3, for barrel-shaped. mm (larger values ​​refer to thinner and wider; saws).

Video: Steel Band Saw Band Wood

When installing band saws in the machine, the following rules are recommended: the cutting edge of the saw should protrude beyond the edge of the pulley to the height of the tooth; the tape should move without displacement on the surface of the pulleys, due to the tilt and turn of the upper pulley; the tension of the belt on the pulleys is set depending on the thickness and width, taking into account the average voltage of a normally tensioned edge dividing saw 50.60 N / mm2, a narrow carpentry saw 30.40 N / mm2, the gap between the saw surface and the guides should be no more than 0.10. 0.15 mm; to prevent the ejection of tape from. pulleys in case of accidental breakage should use fencing and catching automatic devices.

Widespread tape saws, given in table. 7. Back corner of teeth tape drank according to the technical conditions, the CMTU is a = 38 ° ± 2 ° at the cutting angle.

The company "Rudolf Alber" (Austria) produces tape saws with carbide cutting edge with higher resistance than quick cutting drank 40-50 times.

Recosikleservicer London (England) manufactures prefabricated tape saws, consisting of web and segments attached to it.

Taking into account thickness and angles tape saws abrasive wheel 7 is fixed so that its axis is aligned with axis 00 tape saws.

Some slotted saws can be set so that circular or tape saws for processing small parts.

Tape frictional saws used for cutting manganese, nickel, molybdenum, chromium.

Rotational motion tape saws eliminates unproductive return stroke; tape saw moves one way. Tape saws are the most.

Tape saw. Tape saw (1 6-52) is mainly used for sawing along a curved line, although by setting the stop.

Tape saws used when cutting expensive materials. Cutting width tape saw does not exceed 1.8-2 mm, while when working with hacksaw blades it.

Tooth angle 15 ° in both directions. The value of the feed dog 5 is regulated by a nut 11. The mechanism of installation and securing tape saws has two plates.

Semi-automatic circuit; the regulator of the servo system of the semiautomatic device 8541 when changing the cut value allows you to change the feed and deflection tape saws.

Steel Band Saw Band Wood

Tape saws with carbide cutting edge. Sharpening machine tape drank. Machine tools and semi-automatic machines.

. hacksaw blades on hacksaw machine tools, tape saws. Tape saws with carbide cutting edge.

Lumber should be near the circular saws and jointer, since lumber is first cut to. Tape saw one side is installed against the wall.

Joiners often make their own paintings drank from various tape steel or tape tape-saw machine tools, with teeth of various heights and shapes.

Tape saw the connecting rod is also finished; tape width 6-25 mm, rotation speed tape saws 50-600 m / min.

Among the electrified tools for wood processing are produced: electric drills, circular saws, tape saws, chain saws.

Tape saws with carbide cutting edge. Sharpening machine tape drank. Disk balancer saw.

For example, disks for desktop saws can be stored right on the table for this saws (7. Tape saw one side is installed against the wall.

Tape saws with carbide cutting edge. Sharpening machine tape drank. Machine tools and semi-automatic machines.

5.3. Woodworking. Treatment wood includes: sawing, planing, chiselling, drilling, milling, processing on a lathe, peeling and grinding.

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Found on the link :. Treatment mouth guard. products made of burl. Art treatment wood.

Construction and repair. Joiner’s works. in a rural house. A.M. Shepelev. © Rosselkhozizdat 1969. A.M. Shepelev. Every year in the village is developing more and more.
Found at the link: Treatment wood (Joinery).