A kind of preparation method of hot stamping forming die insert

Abstract

The invention discloses a preparation method of an insert of a hot-stamping forming die. The preparation method comprises the following steps (1) a lower half part shape of a conformal cooling water channel is machined on a common forged steel or cast steel base body, and a copper alloy pipeline corresponding to the conformal cooling water channel in shape is arranged on the lower half part shape;(2) electric-arc additive manufacturing of a transition layer is conducted on the surface of the base body and the surface of the copper alloy pipeline, wherein the transition layer is made from copper alloy; (3) the die insert subjected to electric-arc additive manufacturing is tempered at a high temperature and is then slowly cooled, and the transition layer is machined till the distance between the transition layer and the working surface of the die is 1-2 mm; and (4) a reinforcing layer resistant to high-temperature abrasion is formed on the surface of the machined transition layer through laser cladding, and the reinforcing layer formed by laser cladding is machined till the shape of the working surface of the die and the size precision of the die meet requirements. By adoption of the preparation method, the problem of difficult machining of the conformal cooling water channel is solved, the cooling efficiency is improved, and the die manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the field of mold preparation, and in particular relates to a method for preparing a mold insert for hot stamping. Background technique [0002] The design of the hot stamping die plays an important role in the hot stamping forming process. The forming and quenching of the sheet metal are completed in the hot stamping die. The design quality of the cooling channel of the hot stamping die directly affects the cooling effect of the die. The traditional cooling water channel is usually a linear water channel. When the shape of the hot stamping part is complex, the cooling uniformity and cooling efficiency of the hot stamping die are poor, which affects the quality and production efficiency of the final product. According to the different opening methods of cooling channels for hot stamping forming dies, there are currently drilling processing methods, inlay processing methods and embedded casting processing methods, but the existi...

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing hot stamping die inserts, which solves the problem of difficult processing of conformal cooling channels, and this method can also improve the service life of the die and reduce the cost of the die. manufacturing cost

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