SU394145A1 - CARBON HEAD - Google Patents

Description

The invention relates to the field of thread rolling with profile rollers.

A thread-rolling head is known, comprising a corus, a slewing ring, cams with thread-rolling angles and a lid holding the cams in the direction of the axis of the head.

Such a head design does not allow the rollers to be spread by a large amount to grip a pipe, the end of which has a significant runout.

To increase the angle of cam rotation when the head is opened, the cover is mounted ienodo-motionfully on the new ring.

FIG. 1 shows the proposed threading head, a section along LL; in fig. 2 - the same, front view; FIG. 3 - the same, top view.

A thread rolling head consists of a rolling part, a mechanism for opening and closing the head, and an adjustment mechanism for the desired diameter of the thread being rolled.

The rolling part, depending on the size of the thread being rolled, consists of four thread rolling rollers and more (for example, 4 diameters for diameters 16-36 mm, 10 pieces for diameters 74-114 mm, etc.).

Thread rolling rollers / loosely seated on axis 2, which from the approach side of the product have a conical head and two rigid supports in one-piece swivel cam 3. The conical heads on the axes of the thread rolling rollers form the so-called 5 intake cone, which serves as the direction for the bent end rolled pipe. Thread rolling rollers are mounted on the axle at an angle, refer to the axis of the thread rolling head. The angle of inclination of the thread rolling roller is determined by calculation, depending on the range of rolled diameters.

Non-detachable and rotating cams 3 are equipped with curved cuts. Cutouts in

5 cams allow the head to expand by a large amount, providing a gap between the tops of the knurled thread and the thread rolling rollers at the time of opening at least 12 mm and allow the largest number of thread rolling rollers to open. The needle rolls 4 are located on each of the thread rolling rollers. 2 and 2 axles. The cams 3 are located in the openings of the ring 5, which is mounted in the casing 6. The cams are held axially by the cap 7.

Limiting the axial movement of the cam cams to one ring in general facilitates their replacement and sub-adjustment.

0 in the process of working in the automatic cycle.

Do not remove the screw head from the machine.

Mechanism to open the thread rolling machine TOBKH consists of 8 sliders, cams at the top of the cams and one end of the cams freely entering the hole, and the heads in the so-called rotating ring 9; two screw bridging grooves directed to the irocium-lined side and made in the housing 6 and the sleeve 10; springs P; rollers 12 mounted on fingers 13 passing through the ring off 14.

The rotary ring 9 through the columns 15 is connected with the cover 7 by the screw 16.

The mechanism for adjusting the puspap diameter, the diameter of the thread being rolled, consists of an adjusting screw 17, a nut leash 18, a cracker 19 (Fig. 3), loosely fitting a nut and a counter nut 20 (Fig. 1).

The operation of the thread rolling head is as follows.

When the switching ring 14 moves, when the head is opened, from the extreme position, using the clamp installed on the machine, the rollers 12 move along the screw grooves, turn the sleeve 10 and the rotary ring P and bring the installed the size. The movement of the shut-off ring 14 is limited at the moment when the rollers 12 occupy the working position on the straight sections of the mortise grooves. In this position, the springs 11 are in a compressed state. At the end of the thread rolling, the yoke under the action of the stop mounted on the machine moves the turn-off ring 14 to the right side and together with the rollers 12 from the straight sections of the cross 1, 11x c of the screw grooves move to the curvilinear sections. Under the action of the spring / bushing 10 and the rotary ring 9, which is connected to the lid 7 by means of the columns 15 and screws 16, is rotated relative to the ring 5 and the body 6.

This lolzupy 8. turn the cams 3 n thereby withdrawing the thread rolling rollers from the axis of the thread rolling head. The head is opened and it can be freely moved to its original position without being screwed.

To adjust the thread size to be rolled, it is necessary to loosen the lock nut 20 (Fig. 2) and turn the swivel ring 9 relative to the sleeve 10 (the nut leash through the cracker is connected with the sleeve 10) by turning the adjusting screw 17 and thereby bring together or spread the rolling rollers.

To fix the required size of the thread being rolled, the sleeve 10 and the new ring 9 are divided into a new one.

After adjusting the preset size of the thread rolling, the adjusting 17 is fixed by a lock nut 20.

PRIORITY AND RESULTS; i

A thread rolling head consisting of a body with cams arranged therein carrying the roller rolling rollers and coaxially mounted rotary ring and a lid holding the cams in direction of the head axis, characterized in that, to increase the angle of the cams when the head opens, the cover is fixed on the rotary ring.

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