Cutting teeth on blades. Drawing, description

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Cutting teeth on blades. home workshop

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The principle of operation of this device for cutting, or rather, cutting teeth on hacksaw blades, is simple. Its main part is a flywheel with a clip mounted on it with four screws. On the surface of the holder, two or three threads of external threads are cut with a pitch, height and profile of future saw teeth. The extreme thread of the thread is partially removed with a milling cutter or a chisel and cut off at a right angle: the end will act as a punch. To increase the impact force, two counterweights are attached to the flywheel.

From the axis of the flywheel with the help of a system of levers, the matrix is set in motion. She, along the guide groove in the table, either approaches the flywheel at the moment when the punch approaches, then returns back after hitting and cutting out the next tooth. For one revolution of the flywheel, one tooth appears on the canvas, and, in addition, it leans forward by the thread pitch of the clip. To obtain the full height of the teeth and prevent distortions, the matrix and hacksaw blade are limited by holding plates. Their adjustment is carried out by two screws; It is also convenient to use wing nuts.

Device for cutting teeth on blades (click to enlarge): 1 - flywheel, Ø 150 mm, 2 - cage, 3 - fixing screws, 4 - driven pulley, 5 - counterweight, 6 - punch, 7 - matrix, 8 - adjusting screw , 9, 10, 11 - holding plates, 12 - table, 13 - bed, 14 - canvas

The diameters of the driven and driving pulleys are selected depending on the desired web feed speed. The device is closed with a casing from above. If it is necessary to have canvases different in purpose and size, several interchangeable clips are made in tandem with matrices.

Author: N. Shilov

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