SU772656A1 - Apparatus for producing ring-type three-step bended articles - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of three-transition flexible ring parts. BACKGROUND OF THE INVENTION There are known devices for bending a ring-shaped billet from a rod, comprising a hydraulic cylinder, a slider, a mandrel, a lever hydraulic system mounted on a slider, a hydraulic pressing of the billet to the mandrel, bending rollers mounted on the levers and a removal mechanism. In such devices, the flexible annular billet is made by rolling a bar around the mandrel l}. The disadvantage of these devices is their complexity and limited technological capabilities, since they can produce predominantly oval blanks with straight joints and with preheating of the rod in front of flexible large-sized blanks. Also known are devices for bending out of a rod of ring blanks, comprising a hydraulic cylinder, a slider, upper and lower stationary plates, a mandrel, detachable dies and an annular billet pullers. In these devices, the mandrel is fixed on the bottom plate, and detachable dies on spring-loaded sliders, also mounted on the bottom plate and moved from the wedges mounted on the slider of the device 2. A disadvantage of the known devices is nonconcentric application of load to the slider of the device due to the installation of the wedges on the slider of the device outside of it axis. This non-concentricity increases sharply with increasing dimensions of the product, reduces reliability and limits the technological capabilities of the device in terms of the size of the product. Arrangements are known for making three-transition flexible ring parts, comprising a mandrel mounted in a fixed part of the housing, a matrix composed of moving parts of three transitions, parts of the first and third transitions of which are fixed on-reciprocating.-Sliders, and a moving mechanism of moving parts of the matrix in working position In these devices, parts of the second transition matrix are also mounted

on reciprocating moving sliders, which leads to non-concentric loading of the device to the slide associated with a reciprocating drive, with kinematic coupling of all parts of the common-drive matrix.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that parts of the matrix of the second transition are made in the form of pivotal double-arm levers hinged in the fixed part of the body, and the mechanism for moving the moving parts of the matrix to the working position is made in the form of a third transition, copier interacting with pivoting arms of the parts of the second transition matrix, t g, connecting the sliders, the carrier parts of the matrix of the first and third transitions, with the possibility of joint movement in the direction p bochego stroke part of the matrix of the first junction node and a slider fixing the carrier part of the first transition matrix.

Moreover, the fixation unit of the slider, which carries part of the matrix of the first transition, can be made in the form of a wedge, equipped with an independent drive of reciprocating movement

FIG. 1 shows a general view of the device in section; FIG. 2 is a section A-A in FIG. one.

The device contains lower 1 and upper 2 stationary plates, as well as a fixed intermediate plate 3 which are connected by columns 4 and form the device case. On the plate 3 mounted mandrel 5 and pivotally fixed pivot levers 6 - part of the matrix of the second transition. Part 7 of the matrix of the first transition is placed on the slider 8, and part 9 of the matrix of the third transition is on the slider 10. The mechanism for moving the movable parts of the matrix to the working position is made in the form of a copier 11 located on the slider 10 associated with the drive 12 of the reciprocating movement t g 13 rigidly mounted on the slider 10 and the fixing unit in the working position of the slide 8. The ribs 13 freely pass through the fixed intermediate plate 3 and the slider 8 and have stops 14 in the lower part. The fixing unit in the working position of the slide 8 is made in the form wedge § 15, equipped with an individual p) with water 16 reciprocating movement.

The device works in the following way.

In the initial position, the slider 8 is in the lower position f and the slider 10 is on average between the return and the bottom positions. When this gap between the lugs 14 in the lower part of t g 13 and

Slider 10 is selected. The measurement of the workpiece is carried out on the matrix 7, where the workpiece is fixed against movement by the matrix figure and also the limiters 17. Next, J raises the ram 10. At the same time, ram 8 with the matrix 7 and a preform in which the preform envelops around the opQ of rake 5 and takes the form of a staple. In the process of bending the workpiece at the first transition, the spring-loaded rlchagi 6 matrices of the second transition are divorced and do not prevent the bending of the workpiece. After raising the sliders 8 and 10 to the top

“5 position wedge 15 locks the slider 8 in this position.

Next, the slider 10 is lowered, during which the copier 11 with inclined sections acts on the rollers 18 of the levers 6 and turns them around the axis. In this case, the second transition of the workpiece bending on the mandrel 5 is performed. After the completion of the second transition, the further lowering of the slide 10 is not accompanied by turning the levers 6, since the rollers 18 interact with the vertical sections of the copier 11. At the end of the stroke of the slide 10, the third transition is flexible the annular lobe is thin on the mandrel 5 due to the impact on the joined ends of the workpiece of the matrix part 9, in the process of lowering the slider 10 tons 13 move freely in the holes of the plate 3 and the slider

5 in and between the lugs 14 in the lower part of the tg 13 and the slider 8 a gap is formed. Next, at the same time, the slide 10 is raised and the wedge 15 is withdrawn for engagement with the slide 8, for

In this case, the slide 8 is lowered by the force of its own weight at a speed limited by the speed of the wedge supply 15. In this case, also, the levers 6 of the second transfer pass are diluted. Then, using the puller 19, the ring billet 20 is transferred from the mandrel 5 to the mandrel 21 and the pullers 19 are returned to their original position. In the subsequent capture of the ring blank 20 by means of extraction from

 the device (not shown), the mandrel 21 is removed from the ring for: preparation. After removing the ring blank from the device, the mandrel 21 returns to its original position.

55 The proposed device allows to exclude nonconcentric application of the load to the slider of the device during the formation of the ring billet. This increases the reliability of the device,

Claims (3)

enables in a cold state to obtain large-sized ring blanks of a regular round shape and, consequently, expands the technological capabilities of the device. Claim 1. Device for manufacturing annular parts of three-junction flexible, containing a mandrel mounted in a fixed part of the body, a matrix composed of moving parts of three transitions, parts of the first and third transitions of which are fixed on reciprocating moving sliders In the working position, characterized in that, in order to increase the reliability of the device, part of the matrix of the second transition is made in the form of double-arm swivel arms attached to the fixed part of the body, and the mechanism for moving the moving parts of the matrix to the working position is made as a copier located on a slider carrying a part of the third transition matrix, a copier interacting with the swivel arms of the second transition part of the matrix, connecting the sliders of the first and the third transition, with the possibility of joint movement in the direction of the working stroke of the part of the mat. The patterns of the first transition, and the fixation unit of the slider, which carries part of the matrix of the first transition. 2. The device according to claim 1, characterized in that the fixation unit of the slider, which carries part of the matrix of the first transition, is made in the form of a wedge, equipped with a reciprocating drive. Sources of information taken into account in the examination 1. Facade 1976, 27.12, p. 647. 2. USSR author's certificate for application No. 2472214 / 25-27, cl. B 21 F 37/00, 04/04/77. 3. Malov A.N. Tech. Cold stamping. M., 1963, p. 182 of FIG. 94 (prototype). tf