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

A technology of internal high-pressure forming and special-shaped cross-section, which is applied in the direction of forming tools, engine seals, engine components, etc., can solve the problems of mold and pipe waste, and achieve the effects of short sealing section, energy saving, and tube blank material saving

Inactive Publication Date: 2008-09-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 tu

Method used

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

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specific Embodiment approach 1

[0010] Specific embodiment 1: As shown in Fig. 1 and Fig. 2, the sealing method of high-pressure forming special-shaped cross-section in a pipe of this embodiment is realized according to the following steps: 1. Pre-deform the end cross-section of the tube blank so that the end cross-section becomes The shape is the same as or similar to the cross section of the mold cavity, then the tube blank is placed in the lower mold and the upper mold is closed; 2. The two ends of the tube blank are directly sealed with sealing punches, and liquid is filled into the tube blank; 3. The blank tube is pressurized from 0 to 400 MPa and the sealing punches at both ends of the blank tube are simultaneously pushed inward along the axial direction of the tube blank; fourth, the pressure is relieved and the sealing punch of the special-shaped section is returned to position, that is, the required workpiece is formed.

specific Embodiment approach 2

[0011] Specific implementation manner 2: As shown in Figure 1 and Figure 2, the sealing punch of this embodiment is composed of a correcting section 2, a sealing section 3, and a sealing connecting rod 4. The correcting section 2, the sealing section 3 and the sealing connecting rod 4 The front end of the correcting section 2 is fixed in order to form a whole body. The front end of the correcting section 2 is provided with a transition fillet 1. The cross-sectional area of ​​the sealing section 3 is smaller than the cross-sectional area of ​​the sealing connecting rod 4, and the cross-sectional area of ​​the correcting section 2 is smaller than the cross-sectional area of ​​the sealing connecting rod 4. The cross-sectional area gradually increases from the non-connected end to the connected end. The connecting rod 4 is connected with other driving devices, such as a plunger cylinder, etc., and the sealing load is applied by the movement of the driving device.

specific Embodiment approach 3

[0012] Specific implementation manner three: such as Figure 3~4 As shown, the cross section of the sealing punch of this embodiment is rectangular. This design is suitable for sealing when the cross section of the part to be processed is rectangular. The other composition and connection relationship are the same as in the second embodiment.

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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...

Claims

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Application Information

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IPC IPC(8): B21D26/02B21D37/00F16J15/02B21D26/033
Inventor 苑世剑韩聪王小松
Owner HARBIN INST OF TECH
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