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Low internal pressure forming method for cavity parts

A cavity and internal pressure technology, which is applied in the field of low internal pressure forming of cavity parts, can solve the problems of high cost and high cost of parts

Active Publication Date: 2016-03-30
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes the cost of internal high pressure forming equipment expensive, and the cost of internal high pressure forming parts remains high

Method used

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  • Low internal pressure forming method for cavity parts
  • Low internal pressure forming method for cavity parts
  • Low internal pressure forming method for cavity parts

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Embodiment Construction

[0019] Taking a certain car longitudinal arm cavity as an example, the low internal pressure forming method of the cavity of the present invention will be described in detail below (see figure 1 ). Such as Figure 2a , 2b As shown, the material of the cavity is carbon steel, the thickness of the cavity blank is t=2-5mm, and the diameter of the pipe material is D=55-75mm.

[0020] Step 1: Put the upper mold 6 and the lower mold 2 of the forming mold, the upper clamping heads 4, 8 and the lower clamping heads 3, 7 on the clamping press, and then put the cavity blank 1 on the lower mold 2 of the forming mold Up, control the mold clamping press so that the upper clamping heads 4, 8 and the lower clamping heads 3, 7 move toward each other, and clamp the two ends of the cavity blank 1;

[0021] Step 2: Insert the two sealing heads 5 and 9 into the two ends of the cavity blank 1 respectively to realize the sealing of the cavity blank 1; Surface matching structure; the ends of the...

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Abstract

The invention relates to a cavity low-internal-pressure forming method which includes: placing a cavity blank on a lower die of a forming die, and controlling a die assembling pressing machine to allow an upper clamping head and a lower clamping head to tightly clamp two ends of the cavity blank; inserting seal heads into the two ends of the cavity blank; filling liquid media into the cavity blank through guide passages of the seal heads; controlling an upper die of the die assembling pressing machine to move downwardly to press the cavity blank, and allowing pressure of the liquid media in the cavity blank to change according to process requirements until the cavity is formed; drawing out the seal heads and discharging the liquid media; controlling the die assembling pressing machine to allow the upper die, the upper clamping head and the lower clamping head to return, and taking out the cavity. The method is low in hydraulic component requirements, low in equipment investment, and stable in equipment performance.

Description

technical field [0001] The invention belongs to the technical field of hydroforming, and relates to a low internal pressure forming method for cavity parts. Background technique [0002] Internal high pressure forming is a cavity forming process that has developed rapidly in recent years. The advantage of internal high pressure forming is that it can form cavity parts with variable cross-sectional shape and size, especially pipe parts with little change in cross-sectional circumference. More suitable for internal high pressure forming. The specific forming process is as follows: [0003] Tube billet ------ (pre-forming) ------ final forming mold clamping and holding pressure --- both ends of the tube billet are sealed ------ the tube is filled with medium --- --- Pressurize the medium in the tube ------ Part forming ------ Open the seal --- Release the medium in the tube --- Take out the part to complete a working cycle. [0004] At present, the forming of cavity parts mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/033B21D26/02
Inventor 徐成林刘世宝宋宝阳王广盛李汉盈付成林富壮王建生谢连庆王丽芬唐泽迁李海平侯杰王念强
Owner CHINA FIRST AUTOMOBILE