SU402436A1 - DEVICE FOR CONTINUOUS THREAD CUTTING - Google Patents

Description

one

The invention relates to the field of machining of machine parts and can be used for threading faceted and round with slotted nuts.

The device for continuous threading in nuts with a tap, driven from even-lying but circumference screws, with a rectangular thread, feed: their nuts along the tap, rezush, and part of which is located in the drive guide pipe.

In known devices for continuous threading in nuts, curved taps are used, which are fixed and driven in turn by the nuts themselves moving in the cutting process along the tap.

As a result, the threads in the nuts and on the tap may be damaged, the fixing of the tap is unreliable, which is also reflected in the quality of the thread being cut.

The purpose of the invention is to fix the tap in the axial and radial directions and to improve the accuracy of the cut thread.

For this purpose, in the proposed device, on the shank of the tap, chevron cogging is made, which is meshed with ocular cuts, made on the feed screws.

On -fig. 1 shows the proposed device, a longitudinal section, FIG. 2-section along A-A in FIG. one.

The tap 1 is set between three radially circumferential circumferences, the axis of which

coincides with the axis of the tap, screws 2, imitated in bearings 3 of the housing 4 of the device. The screws 2 are provided with a rectangular thread 5 and chevron serrated cuts 6 on the outer surfaces. The shank of the tap 1 is provided with a pin-shaped serrated 7, which is in permanent engagement with chevron serrated 6 screws 2, due to which the tap 1 is screwed from the screws 2 and fixed in the axial

and radial direction. The screws 2 are mounted inside the drum 8 mounted in the bearings 9 of the housing 4 so that their toothed cuts 6 are meshed with the internal scuba crown 10 of the drum 8, from which the screws 2 are simultaneously rotated. The rotation of the drum 8 is driven from the engine 11, a worm gear pair 12, a cylindrical replaceable pair 13, a 14 H tooth comb, 15 mounted on

drum 8.

The cutting part 16 of the tap I is open; it is in the guide tube 17 and coaxially with it. The pipe is mounted in bearings 18 of the housing 4, its internal cross-section corresponds to the contour

nuts being cut 19. Pipe 17 goes into

rotation from the engine 11 through the crank ;: th pair 12, a cylindrical interchangeable pair 20, gear 21 and a gear rim 22 fixed on the guide tube 17.

The Pai6oTa device is implemented as follows.

The billet nuts 19 in the oriented position are strung on the projecting end of the shank of the tap 1 and the side surfaces of the threads 5 in the ints 2 are fed, like screws, along the tap 1 to its part 16. so that the nuts 19 move freely with the screws 2 along the shank of the tap 1. When leaving the engagement with the screws 2, the nuts 19 fall into the guide tube 17 and onto the intake portion of the cutting part 16 of the tap 1. Rotating the tube 17, the nuts 19 move along the relay / The first part 16 of the tap 1 is threaded and, after being machined with the entire cutting part 16 of the tap 1, a nut 19 is pulled out of the device.

Subject invention

A device for continuous threading in nuts with a tap rotated from circumferentially circumferential BINTS. With a rectangular thread, feeding nuts along the tap, the cutting part of which is located in a drive guide tube, characterized in that axial and radial directions and increase the accuracy of the thread being cut, on the shank of the tap there is a chevron cog cut made in engagement with the chevron cuts cut made on the feed screws.

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