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Powerful short-range demolding structure

A short-range, demoulding technology, applied in the direction of metal extrusion dies, etc., can solve the problem of being directly pulled off the ground

Pending Publication Date: 2020-10-27
BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the bolt strength is simply increased, the bolts of the equipment workbench may even be pulled off, and the hydraulically fixed workbench will be pulled off the ground directly

Method used

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] The strong short-range demoulding structure of the present invention is suitable for such as Figure 1-2 Release of a product with a tapered bore in the back extrusion shown. The principle of this structure is based on the tapered shape of the punch, and the ejection force between the reverse extrusion and the punch only exists and is the largest at the initial ejection position. As long as the anti-extrusion part of the holding mold is pushed by a certain distance with a relatively large force, such as about 10mm, the anti-extrusion part will fall naturally, so as to achieve smooth demoulding.

[0020] Such as Figure 3-4 As shown, the strong short-range demoulding structure...

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Abstract

The invention discloses a powerful short-range demolding structure applied to products of backward extrusion part with conical inner holes. The powerful short-range demolding structure comprises at least three hydraulic cylinders, wherein the hydraulic cylinders are vertically mounted in an upper die plate of a forging extruding die; a pressing plate fixed on the upper die plate is sleeved with the ends of hydraulic rod sides of the hydraulic cylinders through hydraulic cylinder mounting holes and is fixedly connected with the hydraulic cylinders; and piston rods of the hydraulic cylinders arefixedly connected with a discharging plate under the pressing plate. According to the powerful short-range demolding structure, the hydraulic cylinders are used for demolding; the demolding force isgreat; the pressure and the number of the hydraulic cylinders can be changed according to sizes and inner hole angles of the extrusion parts; the demolding force is concentrated between the discharging plate and the pressing plate without dependence on the strength of upper and lower bolts on the die, the die plate and equipment tabletops.

Description

technical field [0001] The invention relates to the technical field of extrusion demoulding, in particular to a powerful short-range demoulding structure. Background technique [0002] Demolding (separating the forging from the extrusion punch) of the forging from the extrusion punch has always been a major problem in the extrusion process. The demoulding force of the reverse extrusion process is affected by factors such as the size of the forging, the surface roughness of the mold, and the lubrication condition. The smaller the release force, the greater the release force. Conventional demoulding relies solely on bolts to fix the punch and the stripper plate. When the bolts are pulled out during demoulding, the stripper plate bolts are often pulled out and the punch fixing bolts are pulled out. If the bolt strength is simply increased, the bolts of the equipment workbench may even be pulled out, and the hydraulically fixed workbench will be pulled off the ground directly....

Claims

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Application Information

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IPC IPC(8): B21C35/02B21C25/02B21C23/21
CPCB21C23/21B21C25/02B21C35/02
Inventor 闫红艳
Owner BEIJING RES INST OF MECHANICAL&ELECTRICAL TECH
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