RU16265U1 - DEVICE FOR PRODUCTION OF HOLLOW PRODUCTS - Google Patents

Abstract

A device for producing hollow articles containing a matrix with a calibrating belt, a punch, a mandrel, characterized in that the mandrel is made with the possibility of axial movement relative to the punch under the influence of an elastic element, a sharp edge is made at the output end of the matrix of the matrix, and a taper at the initial part of the mandrel .

Description

Device for receiving hollow products

The utility model relates to the processing of metals by pressure, namely, the extrusion of hollow products.

A device for producing hollow products, comprising a matrix, a pivoted punch with a rigidly fixed mandrel 1, is known.

Its disadvantage is low-tech, since the pressed workpiece remains on the mandrel.

Closest to the proposed technical essence is a device containing a matrix with a calibrating girdle, a punch with a rigidly fixed mandrel, and the length of the mandrel is equal to or greater than the total length of the workpieces and the finished product 2.

Its disadvantage is low-tech caused by delays of the pressed workpiece on the mandrel. This is due to the fact that the contact area of the workpiece material with the surface of the mandrel is larger than the contact area with the surface of the matrix and, therefore, due to the greater friction force of the workpiece with the mandrel, it pushes it during the reverse stroke of the punch from the calibrating matrix belt. In this regard, additional time is required to remove the pressed workpiece from the mandrel.

The technical problem solved by the proposed utility model is to increase the manufacturability of the device by ensuring the removal of the pressed workpiece from the mandrel.

The problem is solved by the fact that in a device containing a matrix with a calibrating belt, the punch, mandrel, mandrel is made with the possibility of axial movement relative to the punch under the influence of an elastic element, a sharp edge is made at the output end of the matrix of the matrix, and at the initial part of the mandrel tapering.

The essence of the technical solution is illustrated by the drawing, where Fig. 1 shows the device in the initial position on the left side, at the beginning of deformation of the workpiece on the right, and Fig. 2: in the left part - at the end of deformation, in the right part - at the beginning of the mandrel extraction from a deformed workpiece.

The device contains a matrix 1 with a calibrating girdle, on the output end of which there is a sharp edge 2, a guide sleeve 3, into which the workpiece 4 is mounted, a punch 5 is mounted on the press slide, to which a mandrel b is attached, on the initial part of which there is a taper 7 within the tolerance a pusher 8 is mounted on the hole size of the pressed billet, coaxial with the mandrel, with the possibility of longitudinal movement under the action of springs 9 located in the cavities

- M.K.L.V2i 13/02

punch 5 ... / Y 5 /, I

The device operates as follows. Install the workpiece 4 in the guide sleeve 2 and start moving the punch 5: while the mandrel b enters the cavity of the workpiece, and the pusher 8 enters the guide sleeve 3 and touches the end face of the workpiece. Then, the free travel of the springs 9 is selected and extrusion of the workpiece through the gauge belt of the matrix 1 begins until it stops in the inlet cone of the matrix, and the inner surface of the workpiece is formed on the mandrel 6. The punch begins to reverse movement, with the force of the compressed springs 9 and the sharp edge 2 at the output end the calibrating belt of the matrix prevent the removal of the pressed workpiece from the calibrating belt of the matrix at the initial moment of the reverse stroke of the punch. Since the initial portion of the mandrel is made with a taper of 7, the contact area of the surface of the pressed workpiece with the mandrel becomes smaller than the contact area with the matrix, as a result of which the pressed workpiece remains on the matrix. After the punch returns to its initial position, the next workpiece is installed in the guide sleeve and the above process is repeated, while at the initial moment of extrusion of the second workpiece, it pushes the first pressed workpiece from the matrix.

1.a.c.N 1007777, M.K.L. B21C 23/08

2. Certificate to PM N RU 7629 M.cl.V2i 13/02

Claims (1)

A device for producing hollow articles containing a matrix with a calibrating belt, a punch, a mandrel, characterized in that the mandrel is made with the possibility of axial movement relative to the punch under the influence of an elastic element, a sharp edge is made at the output end of the matrix of the matrix, and a taper at the initial part of the mandrel .