SU1696061A1 - Device for production of commutator rings - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to the processing of metals by pressure, and can be used in the manufacture of switching rings of a .1 lecturer and other tubular parts with a shaped cylindrical surface. The goal is to increase productivity. The device contains punches in the form of segments 5 fixed on the axis 4, a mandrel 8 and an additional punch 10 with a torus working surface. A workpiece 9 is applied to the mandrel 8. The work load P is applied through the support 2. The workpiece 9 is crimped. The latter simultaneously moves to the support 2 and contacts the additional punch 10 and its edge. As a result of this movement, the profile of the grooves on the inner surface of the workpiece 9 is simultaneously formed, the collar and the separating groove are formed on the collar. 2 hp f-ly, 3 ill. (L o o o o s

Description

The invention relates to mechanical engineering, in particular to the processing of metals by pressure, and can be used in the manufacture of a commutator switching ring and other tubular shaped parts with a profiled cylindrical surface.

The aim of the invention is to improve the performance and accuracy of processing,

Fig, 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - additional punch with cutting inserts.

On columns 1 is a support 2, Racks 3 are stationary on a support. In racks 3, by means of axles 4, punches are installed in the form of segments 5. Columns 1 are fixed in plate 6, which contacts segments 5 via rollers 7. A mandrel 8 with a coaxially arranged workpiece 9 is mounted on the same axis with the support. The supports are equipped with an additional punch 10. The drawing also shows an additional punch with cutting inserts 11, which can be fastened both mechanically and detachably using solder or welding.

The manufacture of the commutator switching ring is carried out as follows.

In the initial position (at the diluted position of the segments 5), the tubular billet 9 with the mandrel 8 is placed in contact with them. inserts 11), resulting in the simultaneous formation of the profile of the grooves on the inner surface of the workpiece, the formation of the collar and the separating groove on the collar. Then, the preform is removed from the die.

The gap between the groove of the composite punch and the outer surface of the additional punch is selected experimentally for each particular case.

In accordance with the described solution, the manufacture of the switching ring of the collector CT 230 of compact copper M1 is carried out. The punch is made of steel 40X from 8 identical segments. In the closed position (at the contact of the segments) the central channel has the following dimensions: at a length of 22 mm - 46.5 mm, at a length

12 mm - 63.2 mm. The calibrating mandrel is made of HVG steel, 100 mm long, 45.5 mm in diameter, 55 mm long in the form of a gear wheel, the number of teeth is 29 s.

profile of an isosceles triangle. Copper billet has the following dimensions: length 60 mm, inner diameter 45.8 mm, outer 58 mm. Coaxially with the mandrel and stationary relative to the support place an additional punch with an inner diameter of 45.6 mm and an outer punch 63 mm. The deformation is carried out on a 50 ton press. The workpiece is placed in contact with the segments when they are divorced, and the deformation is carried out prior to the contact of the segments. After that, the switching ring is removed from the stamp.

Recorded the following results. The ring production time is shortened by an average of 10 minutes, based on the results of 50 experiments, which is explained by the simultaneous formation of the profile and the shoulder. The maximum load is 48 tons. In a known stamp, there is 98 tons.

Bench tests at a speed of 24

5 thousand rev / min, cycle time of 20 s and the number of cycles of 80 thousand showed high operational reliability of collectors.

When using an additional punch with a torus working surface

0 and cutting inserts of VKb in the amount of 29 pieces with a knife thickness of 1 mm, the following results were obtained: the deformation force of 46 tons, the productivity of the process of producing a ring with separator grooves at the butt-end increased by more than 8 times in comparison with the known structure.

In all experiments, the deviation of profile sizes from nominal decreased

0 more than 4-5 times.

Claims (3)

Claim 1. Device for manufacturing commutator ring with separating grooves on the end, containing 5 columns mounted on the slab, on which an annular support is placed with punches hinged to it in the form of segments with an annular groove on the working surfaces, and located along the axis 0 devices coaxial to the working surfaces of the mandrel segments, characterized in that, in order to increase productivity and manufacturing accuracy, it is provided installed coaxially with the mandrel and fixedly mounted on a support with an additional tubular punch, and the grooves on the segments adjoin the end face additional punch. 2. The device according to claim 1, of which is the fact that the end of the additional punch, facing the main punch, has the shape of a torus surface, 3. The device according to claims 1 and 2, characterized in that it is equipped with on the working surface of the additional punch cutting inserts having a profile of the separating groove of the collector ring, the number of which is equal to the number of grooves on the mandrel. FIG. 2 eight YU Thebes