A method of manufacturing a die block

 

(57) Abstract:

Usage: die blocks used for the isothermal forging of metals. The essence of the invention: housing die block surface directed to the working parts have recesses in the form of a truncated cone, evenly spaced across its surface. Heat insulating inserts are in the form of a set of truncated cones, the basis of which amounts to 1.3-1.5 bottom area of the recess of the body. The volume of deepening and Cabinet insert almost equal. Insert set into the recess of the large body of its base, gather the matrix, punch and produce the compacting of insulating material due to the efforts of the transmitted matrix and punch. 2 Il.

The invention relates to a hot stamping, in particular for the isothermal forging of metals and their alloys.

A known method of manufacturing a die blocks by making shaping element with a landing place for the insertion and fastening of the insert in a forming element, thus forming element perform configuration of bottom part of the insert. Between the shaping elements and the base plate (Cole every 15 less than the strength of die plates. The challenge is to ensure that the insulation in place of the coupling matrix and chassis manufactured of die blocks to exclude the impact strength properties of heat-insulating material.

Steps to solving this problem have been made in the method adopted for the prototype. A method of manufacturing a die block is consistent installation in the recess of the block insulating inserts, rings and formative elements. The insert is placed in the recess of the housing with a gap equal to 0,95-9,75% of the diameter of the recess. The ring is performed with the same volume of the gap, and with an outer diameter less than the diameter of the insert on the value of its double thickness. Under the influence of the efforts transmitted to the surface of the insulating non-metallic insert through the ring, the insert being destroyed at an angle to the line of impact load. The chips are moved in the gap between the insert and the recess of the housing. Formative element sealing material paste as inside the ring and in the peripheral part. The known method solves the problem of ensuring the insulation of the formative elements of the die block, creates an insulating layer with large strength properties. But the task of povysheniya increase the density of insulating material throughout the volume of the insert is solved by the proposed method of manufacturing a die block. The method consists in the fact that the housing die block surface directed to the working parts have recesses in the form of a truncated cone, evenly spaced across its surface, and a heat insulating inserts are in the form of a set of truncated cones, the basis of which amounts to 1.3-1.5 bottom area of the recess of the body with equal volumes of the cavities in the housing and a conical insert. Then put the insert in large grounds of the cone into the recess of the housing, assemble the matrix, punch and produce the compacting of insulating material inserts due to the efforts of the transmitted matrix and punch to be inserted. Insulating inserts can be produced from heat-resistant ceramics and asbestos boards.

In Fig. 1 shows a die block before application of forging force; Fig.2 - die unit after Assembly.

Die block consists of shaping elements of the matrix 1 and the punch 2, and insulating inserts 3, placed in the conical recesses 4 of the housing 5.

The method is as follows. In the recesses 4 of the housing 5 large base of the cone stack box 3, made of asbestotsementnoj Hanson 2. Then through the housing 5 of the stamp is applied to the clamping taken as 1500 kg/cm2section stamped part in the plane perpendicular to the line of action of the forging force. This leads to compaction of the material of the insert. The force is selected based on the value of providing a touch of the punch and die surface of the housing. As the touch surface of the body forming elements are only needed for separation insulating inserts between them, then accept its size limit, it is possible to be performed with modern instruments and is equal to the square of 0.2-1% of the surface area forming elements supported on the insulating insert.

The proposed method allows comparison with the prototype and known solutions to abandon parts that play the role of hub stresses for the targeted destruction of inserts, simplifies the manufacture of the stamp, as well as by reducing the number of dissimilar parts reduces Assembly time stamp unit. Such constructions die blocks and the method of Assembly may be applicable to isothermal hot stamping as parts of aluminum and titanium alloys with larger dimensions is the complete housing with a cavity, laying into him insulating insertion and placement of the formative elements, followed by the application of force to the insulating insert, characterized in that the recess is made in the shape of a truncated cone on the surface of the body repeatedly, insulating insert is made in the shape of a truncated cone with a large area of the base, equal to 1.3 - 1.5 bottom area of the recess and the insert is placed in the recess housing a large base of the cone.

 

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