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Backward extrusion forming device for miniature precision part

A precision parts, reverse extrusion technology, applied in the direction of metal extrusion, pressure head / punch, metal processing equipment, etc., to achieve the effect of reduced processing, high surface quality, and uniform thickness of the side wall

Inactive Publication Date: 2010-06-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For conventional extruded parts, the processing accuracy of the mold can be guaranteed by this method, but for miniature precision reverse extrusion parts, the size of the formed parts is smaller, and many of its characteristic dimensions reach the micron level. The traditional reverse extrusion forming process cannot meet these requirements. Require

Method used

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  • Backward extrusion forming device for miniature precision part

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail: present embodiment implements under the premise of technical solution of the present invention, has provided detailed implementation mode and operation process, but protection scope of the present invention is not limited to following Example.

[0013] Such as figure 1 As shown, this embodiment includes: mold base 1, support base 2, ejector rod 3, die 4, punch sleeve 5, pin 6, fastening screw 7, connecting seat 8, die press head 9, punch 10 , upper mold base 11, fixed pin 12, upper backing plate 13, upper template 14, fixed bolt 15, connecting bolt 16, sleeve spring 17, blank 18, die support 19, fixed block 20, support spring 21, mold unloading Bolt 22. Wherein support base 2, push rod 3, die 4, die support 19, fixed block 20, support spring 21 form floating device; Connecting seat 8, die press head 9, punch 10 and pin 6 form combination press head; Convex ...

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Abstract

The invention discloses a backward extrusion forming device for a miniature precision part in the technical field of machining work, which comprises a die holder, a combined pressure head, a floating device, a compressing mechanism, a fixed mechanism and a demolding bolt, wherein the die holder is positioned on a worktable of equipment; the floating device and the combined pressure head are positioned in the die holder; the lower end of the fixed mechanism is movably connected with the combined pressure head; the upper end of the fixed mechanism is fixedly connected with pressure equipment; and the demolding bolt is movably arranged in the die holder and contacted with the floating device. The invention realizes high-precision guidance of a terrace die and a cavity die in the forming process and controls the forming precision of final parts.

Description

technical field [0001] The invention relates to a plastic forming device in the technical field of mechanical processing, in particular to a reverse extrusion forming device for micro precision parts. Background technique [0002] In the process of back extrusion of slender deep-hole thin-walled parts, it is easy to have uneven thickness of the side wall of the formed part, thinning of the bottom of the side wall, and uneven end surface of the extrusion port. The main reasons are as follows: 1. The lower end of the punch is laterally displaced by the lateral force, resulting in the lack of precise guidance of the punch and die, the gap between the punch and the die is uneven, and the material flow at the extrusion orifice is uneven; 2. The thickness of the bottom of the part is too thin , the pressure allowance is small, and there is not enough metal to replenish the side wall; 3. When the deformed metal passes through the extrusion orifice, it is affected by the friction of...

Claims

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Application Information

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IPC IPC(8): B21C23/21B21C23/20B21C26/00
Inventor 董湘怀王茹燕马智慧马宁
Owner SHANGHAI JIAO TONG UNIV
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