SU761102A1 - Apparatus for making beads on the strip - Google Patents

Description

The invention relates to the processing of metals by pressure, can be used at the enterprises of mechanical engineering and metalworking to obtain shaped profiles of hard-to-deform and other metals by creating local thickenings on the strip. In this case, it is possible to use local heating of the workpiece before plastic deformation.

A device for the formation of nodules on the strip, containing a deforming unit made in the form of two drive and two idle rollers, forming a deforming cavity [1].

A disadvantage of the known devices are low rigidity and the inability to obtain the exact product.

It is also known a device containing drive shafts connected by cheeks with rollers mounted on them, forming a deformation zone with deforming elements [2].

The disadvantages of the known device are its low rigidity and the ability of the strip to lose stability when the draft due to the narrow zone of the deformation zone in the direction of feed of the strip.

The aim of the invention is to improve the dimensional accuracy of the resulting profiles by increasing the rigidity of the snap and

2

prevent loss of stability of the strip in the deformation zone during the draft.

This goal is achieved by the fact that the deforming element is made in the form of 5 interchangeable liners installed on the end surfaces of the cheeks facing one another, while the working surfaces of the interchangeable liners are made with longitudinal lubrication grooves.

Yu In FIG. 1 shows a general view of the proposed device; in fig. 2 is a section along the vertical axis of the shafts; in fig. 3-5 — various versions of the arrangement of rolling rollers and side liners, depending on the shape of the rolled billet.

The device consists of two parallel monolithic cheeks 1, mounted on the drive shafts 2 of the mill on bearings 20 3 sliding. The cheeks 1 are fastened together by means of tightening bolts 4 and spacer sleeves 5. On the cheeks there are fixed interchangeable side overlapping deformation points with 6 bolts 7. Between the 25 cheeks 1 on the shafts of the mill there are rolling rollers 9 on the keys 8 to avoid sliding friction between the side the cheeks 1 and the tightening nut 10 are fitted with a thrust bearing 11. At the front edges of the cheeks 1, the insertion '761102' is located

3 4

The main guide wiring 12, and at the rear edges - lead guide wiring 13.

The device as a result of the presence of monolithic cheeks with sliding bearings, 5 bolted together, provides high rigidity of the device and allows you to get profiles with high dimensional accuracy of cross-section.

The sleeves 5 between the cheeks provide 10 a guaranteed gap between the cheeks 1 and the rollers 9, for example, under the slide fit. As a result of the location of the input and output wiring directly on the device, the equipment setup for operation is simplified and it becomes possible to use simpler equipment.

The device works as follows. 20

The original strip 14, weakened by local heating through the input wiring 12, is fed into the rollers 9 rotating with the help of the shafts 2 and captured by them due to friction forces. When rolling through rock 25 face 9, strip 14 precipitates, as a result of which local thickenings are created on it and a given profile is obtained. Loss of stability of the strip during precipitation is prevented by inserts 6, which contribute to the formation of local thickenings of given shapes and sizes.

When leaving the rollers 9, the strip 14 gets into the wiring 13, which prevents the curvature of the workpiece and directs it. The efforts on the liners through the cheeks are perceived tightening bolts, and the vertical force on the rollers are perceived monolithic cheeks.

The proposed device was manufactured and used to conduct experimental studies on the processing of the technological process of forming profiles from steel strip 20, U9A, as well as in the manufacture of an industrial 45 batch of profiles.

The cheeks for landing diameters of 0 100 mm were made of D16T sheet aluminum alloy 35 mm thick.

Bolts with a diameter of 0.20 mm, a length of 150 mm and sleeves with a length of 37 mm were made of steel 20. Rollers 9 and liners 6, made of steel 5ХНТ, had hardness

NRS 52-54. For ease of operation and information sliding friction between the strip 14 and liners 6 to a minimum, the latter had a smooth entry part and the working surface in contact with the workpiece only in the required places. The rubbing surfaces of the strip 14 and the liners 6, as well as between the cheeks 1 and the rollers 9, were lubricated with graphite grease.

Installation, the device is carried out in the following sequence.

Between the axes of the shafts 2 of the camp, a distance is established corresponding to the size between the centers of the holes on the cheeks 1.

The first cheek with pre-installed liners 6, inserted into the holes with bolts 4, is put on both rolls at the same time, then the upper and lower rollers 9 are put on the shafts and fixed with the help of keys 8. Next, the sleeves are put on the bolts and the second cheek is mounted on the shafts and connect both cheeks with bolt. After that, install the bearings 11 and fix the device with a nut 10.

As the operating experience has shown, the proposed device allows to obtain profiles with high accuracy, conveniently and reliably in operation, and also not difficult in construction.

Claims (1)

Claim A device for the formation of nodules on the strip containing drive shafts connected by cheeks with rollers mounted on them forming deformation zone with deforming elements, characterized in that, in order to increase rigidity and prevent buckling of the strip during deformation, the deforming element is designed as interchangeable liners, installed on the end surfaces of the cheeks facing one another, while the working surfaces of interchangeable liners are made with longitudinal lubrication grooves.