Tubular product internal high-pressure forming special-shaped cross section sealing method and sealing punch

Abstract

A sealing method for a high pressure shaping allotype section in a tubular product and a sealing formed punch relate to a sealing method for the shaping of a tubular product and a sealing formed punch. The invention solves the problems of die and tubular product wasts caused by the fact that transition sections are respectively needed to be obligated at two ends of a tube blank to be processed and are needed to be treated into a round section which is used for the sealing during the high pressure shaping in the existing allotype section component. The method of the invention comprises the steps: the section of the end part of the tube blank is pre-formed; then the tube blank is put into a lower die and an upper die is closed; sealing two ends of the tube blank are sealed directly by the sealing formed punch and filled in liquid; the tube blank is put on pressure; and the needed workpiece is instantly formed after pressure relief. The rectifying section (2), the sealing section (3) and the sealing connecting rod (4) of the sealing formed punch are fixedly connected to form a body from pro to post; the front end of the rectifying section (2) is provided with a transition round angle (1). The method of the invention has the advantages of good sealing effect and saving the tube blank material, etc. The sealing formed punch of allotype section of the invention has the advantages of the flexible and free section forms, the good commonality and the energy conservation.

Description

Technical field [0001] The invention relates to a sealing method for pipe forming and a sealing punch. Background technique [0002] In recent years, with the continuous rapid growth of automobile production and ownership, it has brought about an increasingly huge impact on social energy supply, environmental protection and traffic safety. The lightweight design and manufacturing of automobiles is an important means and method to achieve energy conservation and emission reduction. , Is also one of the trends in the development of modern manufacturing technology. In addition to replacing steel materials with high-strength steel, aluminum-magnesium alloys, engineering plastics, and composite materials, the lightweight of automobiles obtains the best engineering combination, the best load change, uniform structure and the best by adopting advanced design concepts. Geometric shapes and the use of advanced forming processes to manufacture parts are also effective ways to reduce the we...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a sealing method and a sealing punch for special-shaped cross-sections in high-pressure forming of pipes, which solves the problem of the need to reserve a section of transition at both ends of the tube blank to be processed during the high-pressure forming of existing special-shaped cross-section members. section, and the non-circular section transition section is processed into a circular section for sealing, resulting in the waste of molds and pipes

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