SU105918A1 - Threading head - Google Patents

Description

In the well-known thread rolling heads with three rolling rollers, the installation of rollers with a mutual displacement of threads on the thread thread pitch is difficult.

In addition, the known designs of thread rolling heads exclude the possibility of tilting the roller axis at a certain small angle to the axis of the workpiece, and consequently, the possibility of thread rolling with equal pitch on products with different diameters.

These drawbacks do not occur in the described invention. In order to install the knurling rollers with a mixture of threads at a / c step, the axis of the rollers are rotatably hindered in the lever sockets with the possibility of fixing the position of the roller as soon as the threads of the roller enter the cavities of the threaded gauge inserted into the head between the rollers.

To change the angle of inclination of the axis of the rollers to the axis of the workpiece, the shanks of the levers, into the slots of which the rollers are inserted, fit into the curvilinear slots of the slats fixed on the body of the head that regulate the angle of inclination of the axis of the roller.

FIG. 1 shows in partial section obndiy type of thread rolling head; in fig. 2 is a front view of the head; in fig. 3 rear view; in fig. 4 is a section along AA in FIG. 2; in fig. 5-lever with a roller inserted into it.

In the housing / thread rolling head there are three slots arranged at an angle of 120 ° to one another. Three levers 2 are placed in these grooves, which, when screwing or screwing the nut 3 under the action of spring 4, mix along the guides 5 under condition of loosening the bolt 6. Roller 7, SIDDING on the axis 8, rotate freely without play, being fixed by a washer 9 and a screw W. The axis 8 is inserted into the lever 2 and can be locked with a wedge / 7 using a bolt 12. The shanks 13 of the levers 2 fit into the curvilinear grooves of the bars 14 fixed to the opposite side by the heads of the screws 15. When the stem 13 moves in the above curved slots, um change m; n profile roller tilt axis (FIG o.). Installation-.nakat

Rollers with offset threads per / 3 steps are as follows.

A mandrel, at one end of which a caliber plug is attached with a necessary pitch, is inserted with the second end into the head hole located between the rollers 7. The nut 3 is screwed and the rollers are moved apart under the influence of the spring 4. Screw the ring, press the knurled rollers to the threaded caliber and, when the threads of the rollers completely fit into the grooves of the threaded caliber, wedge the axis 8 with a wedge // using a bolt 12, which has been loosened before.

The levers 2 in their grooves after installing the rollers with the displacement of threads on Vs of the thread pitch and the correct angle of inclination of the axis of the roller are fixed with a bolt 6.

Subject invention

Claims (2)

1.Head for knurling threads with three knurled rollers placed at the ends of the levers, the position adjustment of which is carried out under the influence of a nut, characterized in that, in order to install the knurling rollers with the mutual displacement of the threads by / шага step, each axis of the knurled roller is rotatable placed in the lever socket with the possibility of fixing its position, for example, with a wedge after the threads of the rollers enter the hollows of the threaded caliber. 2. The head according to claim I, characterized in that, in order to install the knurling roller at the lifting angle of the thread of the workpiece, the straps attached to the body with curvilinear cuts are used to act on the shanks of the levers when turning them. // I j -I II.I / No. 105918 FIG. 3 FIG. four