SU100117A2 - Automatic machine for cutting slots in screw heads - Google Patents

Description

The invention is an improvement of the model 7A590 slot machine according to the author. St. No. 71088, intended for nrorezki slots in the heads of screws and screws. This machine, when machining the splines in countersunk screws, does not provide a quality part, since a burr is formed at the tool exit side at the bottom of the spline, which is not allowed by technical requirements.

A distinctive feature of the described machine is that for removing burrs in a continuous flow process of cutting the splines, a mechanism with a spring-loaded cutter is installed at the end of the holder, the axis of which is connected with the lath conveyor carrying the product.

FIG. I shows a general view of the mechanism; FIG. 2 - a section of the mechanism along the axis of rotation of the tool.

The mechanism receives a drive from the movement of the conveyor crawlers of the machine, which are equipped with gear racks ..

Slider rails alternately engage with the drive gear / mechanism and through the roller. 2, bevel gears 3 w. 4, the roller 5 and the gear half 6 cause the flat cam 7 to rotate. The latter moves the pusher 8 which abuts the other end against the circular rail 9, inside which there is a spring 10, pressing the pusher 8 against the working surface of the flat cam 7. The round rail 9 engages with a roller gear //, at the lower end of which in rails of the "dovetail" type, a tool restraint 13 is installed under the influence of the spring 12 with a spring 14 attached to it.

When the flat cam 7 is combined with the pusher 8, the cutter 14, under the influence of the spring W, on the rail 9, which is engaged with the bristle roller 11, rotates and touches the conical surface of the product 15 that has come out from under the pulling.

At the first moment of contact of the spring-loaded cutter with the product, the spring 12 of the cutting rod 13 is compressed, then as the tool rotates and the product advances, it begins to expand, which in combination with the high turning speed of the tool, which is several times faster than the cutting speed, ensures the contact edge of the cutter with the product all the way to cut the burr.

The tool is retracted to its initial position by a flat cam 7.

The desired position of the cutter 14 relative to the product 15 is set by turning the stop screw 16 between the rail 9 and the pusher 8, as well as by turning the cam 7 relative to the toothed coupling half 6, at the contiguous ends of which mouse teeth are cut.

Subject invention

Automatic machine for cutting slots in screw heads, etc. works on auth. St. No. 71088, characterized in that, in order to remove burrs in a continuous flow process of cutting splines, a mechanism with a spring-loaded cutter located in rotation about the axis of each screw extending from under the spacing with the help of racks is located at the end of the holder conveyor pair.

S No.

FIG. 2