SU1163955A1 - Die for hot die-forging - Google Patents

Abstract

STAMP FOR HOT BULK PUNCHING, containing a movable top plate with a punch, a fixed bottom plate with a matrix unit mounted in it, made in the form of a housing with an insert placed in it, as well as means for heating the insert and the workpiece in the form of current-carrying tires connected to it, characterized in that, in order to reduce energy costs, increase productivity and expand technological capabilities by providing heating of the workpiece directly in the die, the insert is made in the form of two electrical components with the plane of the connector perpendicular to the direction of movement of the upper plate. -

Description

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01 SP The invention relates to the processing of metals by pressure and can be used in the design of extrusion dies. The aim of the invention is to reduce energy costs, increase productivity and technological capabilities by providing heating of the workpieces directly in the die. FIG. 1 shows a section A-A in FIG. 2; in fig. 2 is a view of B in FIG. D. The stamp contains a movable upper 1 and a fixed lower 2 plate, a punch 3 fixed in the upper plate with a punch-holder 4, a matrix block consisting of a detachable body formed by elements 5 and 6, fitted with an insert of two halves 7 and 8 rigidly connected with elements 5 and 6 and spacers electrically insulated from them 9, for example asbestos, and along the plane of the connector between them with a thin layer O of heat-resistant enamel. The busbars 7 and 8 are rigidly fastened to the throats of the insert 7 and 12. Elements 5 and 6 are mounted in a conical casing 13, on which the turn strips 14 are fixed. In the bottom plate, the G5 pneumatic cylinder equipped with a piston 16, is fitted 2 times. 7 and a rod 18. The stamp operates as follows. The initial blank with a small tension is placed in the working space between the halves of the insert 7 and 8. At the same time, the piston 1 7 of the pneumatic cylinder 1 is in its lowest position. Dp heating of the workpiece through it from the power transformer (not shown) using tires 11 and 12, half of the insert 7 and 8 passes an electric current of a certain density. When the volume of the preform reaches a predetermined temperature, the current supply is stopped, the press is turned on and the stamping process is carried out. To open the matrix assembly and remove the product after stamping is completed, compressed air is supplied through the holes in plate 2 and cr 16 of the piston cavity of the film cylinder. The piston 17, moving upwards, through the rod 18 acts on the elements 5 and bis, using the slats 14, opens them. The product is then freely removed from the stream. The elements 14 also limit the lifting of the elements 5 and 6. After the product has been removed, the piston chamber of the pneumatic cylinder 15 is connected to the atmosphere. Elements 5 and 6, the piston 17 and the rod 18, under the action of their own weight, return to an extremely low position. Then the cycle is repeated. The present invention provides a reduction in energy costs and increases the productivity of the device by eliminating the operation of transporting the heated billet from the heater to the die, and also has advanced technological capabilities.

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Claims (1)

A STAMP FOR HOT VOLUME STAMPING, comprising a movable upper plate with a punch, a motionless lower plate with a matrix unit mounted in it, made in the form of a housing with an insert located in it, and also means for heating the insert and the workpiece in the form of busbars connected to it, characterized in that, in order to reduce energy costs, increase productivity and expand technological capabilities by providing heating of the workpiece directly in the stamp, the insert is made in the form of two electrical insulators nnyh each other and relative to the housing with the connector halves by a plane perpendicular to the direction dvizheniyaverhney plate. ς © SL ςπ