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Stretch-bending forming die and forming method

A stretch-bending forming and mold technology, applied in the field of stretch-bending forming molds and forming, can solve the problems of difficulty in ensuring the forming accuracy of workpieces, a large number of molds, and high production costs, so as to reduce the design and manufacturing cycle, reduce production costs, and improve manufacturing efficiency. Effect

Inactive Publication Date: 2009-09-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the disadvantages that one part needs one mold in the existing stretch bending technology, which leads to a large number of molds in production, high production cost, and difficulty in ensuring the forming accuracy of the workpiece, the present invention proposes a stretch bending forming die and forming method

Method used

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  • Stretch-bending forming die and forming method
  • Stretch-bending forming die and forming method

Examples

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Embodiment 1

[0032] This embodiment is a stretch-bending die for forming a rectangular profile part with a section of 15*20mm, a radius of 350mm, and a length of 510mm. It is characterized in that multiple discrete basic bodies are integrated into a certain profile. mold, and the mold can be arbitrarily combined according to the requirements of the formed profile. The mold includes a basic body 5 , a cushion layer 4 , two clamping blocks 6 , and bolts 7 .

[0033] In this embodiment, the basic body is the basic unit of the mold, and 13 basic bodies are integrated into a mold. The external dimensions of the basic body are determined according to the load of the tensile bending load and the requirements for the rigidity of the mold. For the convenience of processing and use, the working arc surface of the basic body in this embodiment is an arc surface, and the diameter of the arc is equal to the thickness of the basic body. The basic body 5 is a cuboid with a rectangular cross section, a ...

Embodiment 2

[0046] This embodiment is a stretch-bending die for forming a rectangular profile part with a section of 150*200mm, a radius of 3000mm, and a length of 3140mm. It is characterized in that multiple discrete basic bodies are integrated into a certain profile. mold, and the mold can be arbitrarily combined according to the requirements of the formed profile. The mold includes a basic body 5 , a cushion layer 4 , two clamping blocks 6 , and bolts 7 .

[0047] In this embodiment, the basic body is the basic unit of the mold, and 20 basic bodies are integrated into a mold. The external dimensions of the basic body are determined according to the load of the tensile bending load and the requirements for the rigidity of the mold. The working arc surface of the basic body is an elliptical arc surface, and the length ratio of the minor axis to the major axis should be between 0.2-1. The diameter of the major axis of the ellipse in this embodiment is equal to the thickness of the basic...

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Abstract

The invention discloses a stretch-bending forming die and a forming method, including a basic body (5), a cushion layer (4), a connecting bolt (7) and two clamp blocks (6). The end surface of one end of the basic body (5) is an arc working surface (10), with a through-hole (11) which is matched with the connecting bolt (7) in the middle. One clamp block, a plurality of basic bodies and another clamp block are sequentially arranged on the connecting bolt (7) in series and tightly clamped and fixed, thereby integrating a die; by adjusting the position (11) where the connecting bolt passes through a through groove on each basic body, the position of the working surface (10) of each basic body is adjusted; and by fixing the die onto the working table of a stretch bender by a mounting hole (9), the stretch-bending forming is carried out to a workpiece (2) to be formed. In the forming process, by slightly adjusting the position of the basic body (5), the shape of the external surface of the die is changed so as to compensate the rebounding effect on the forming accuracy and adapt to the rebounding control needs of different stretch-bending parts; and the invention is characterized by simple structure, convenient use, high production efficiency and low cost.

Description

1. Technical field [0001] The invention relates to the field of mechanical processing, in particular to a stretch bending forming die and a forming method. 2. Background technology [0002] Stretch bending process is used to manufacture extrusion and plate bending profiles with large size, high requirements for shape accuracy, and relatively large bending radius. Production Process. [0003] Such as figure 1 As shown, for a long time, a rigid integral stretch bending die 1 has been used in the manufacture of stretch bending parts. The workpiece 2 is placed on the rigid integral stretch bending die 1, and the two ends apply tension to the workpiece through the chuck 3 to make it shape. In this forming method, springback will occur in the stretch-bent workpiece 2 after unloading. In order to control the springback, repeated mold repairs and process experiments are required, which is time-consuming and laborious, and the accuracy is difficult to guarantee. At the same time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/10B21D37/12B21D7/04
Inventor 王永军武伟超刘磊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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