SU1220898A1 - Rotary automatic machine for cutting thread - Google Patents

Description

This invention relates to mechanical engineering, in particular rotary machine tools for threading.

The purpose of the invention — improving reliability and reducing noise — is achieved by eliminating shock loads at the time of reversal and, as a result, reducing the likelihood of breakage of small diameters.

FIG. 1 shows the proposed machine, the general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. 3

The rotary threading machine {includes threading the spindle blocks 1, kinematically connected to the rotor 2 by means of the coupling 3, the drive element 4 and the friction disks 5, 6, as well as the friction pairs of semi-rings 7 and 8 of the reversing mechanism. The rotor 2 is kinematically connected with the drive 9 by means of a V-belt transmission 10 of a worm gear 11, gear 12. 12. The drive element 4 is rigidly fixed on the shaft 13, and the friction disks 5 and 6 are mounted on the axis 14 of the slide 15 in bearings 16, the slide 15 mounted in directions 17, located at each position of the rotor 2 in bearings 18 and 19.

The shaft 13 is mounted in bearings 20. The clutch 3 is made in the form of a telescopically connected shaft 13 with a spindle 21 of the spindle unit 1. Spindle units 1 are mounted in the rotor 2 movably (axially), for example, by means of a cam mechanism 22. Friction pairs of half-rings are made of composite and sliding two parts interconnected, for example, grooves 23 and screws 24

One of the half-rings 7, 8 of each friction pair is fixed on the fixed housing 25. In the direction of km17 17, springs 26 are installed with adjusting screws 27. U-shaped bodies 28 with springs 29 and 30 and adjusting screws 31 are installed on the rotor 2.

The machine works as follows

From the drive 9, the torque is transmitted to the rotor 2 by means of a V-belt transmission 10, a worm gear 11 and a gear transmission 12. The rotor begins to rotate. At the same time, the spindle blocks 1 rotate along with the rotor body 2 circumferentially, the friction disks 5 periodically engage with one of the pairs of friction semirings 7 or 8 with the help of a swinging guide 17, rolling around one of the friction pairs 7 or 8, They transmit torque through the drive element 4 to the spindles by means of the coupling 3. In this case the pressing of the friction disks 5 to the driving elements 4 is performed by means of a spring 26 with a force adjusted by a screw 27, and the pressing of the friction disks 5 to pairs of friction fields rings 7 or 8 occurs alternately using the spring 29, the spring 30, adjusted to the required pressing force by means of adjusting screws 31.

At the same time, axial movement of the spindle blocks 1 takes place by means of, for example, a cam mechanism 22. The tool rotational speed is controlled by the angular displacement of one half-ring relative to the other in both friction pairs of half-rings 7 and 8.

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Claims (1)

A ROTARY AUTOMATIC CUTTING MACHINE, in the case of which kinematically connected drives are located, a rotor with spindle blocks and with drive elements for two pairs of half rings, characterized in that, in order to increase reliability and reduce noise level, the reversing mechanism is equipped with fasteners on each rotor positions with U-shaped housings placed in them coaxially to drive elements with the possibility of rotation with counter-spring-loaded guides and sliders with friction disks installed in the guide axes mounted with the possibility of interaction with the drive elements and alternating interaction