Half-mould forming process for metal plate material

A technology of sheet metal and forming process, which is applied in the field of half-mold forming process of sheet metal, which can solve the problems of precise forming of difficult parts, increase of sheet thickness, complex control system, etc., and achieve good forming quality of parts and control of material thinning , The effect of simple mold structure

Inactive Publication Date: 2005-07-27
YANSHAN UNIV
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Problems solved by technology

However, evenly distributed pressure is not conducive to the control of the thickness of the formed part. Once the material is partially thinned during the forming process, it will easily cause cracks in the thinned area
In addition, due to the difficulty of sealing control in the hydroforming process, sealing rings must be used to force sealing, so that the material flow is restricted, resulting in deformation of the sheet metal by thinning, which greatly restricts the use of the sheet metal forming limit
In this case, in order to form a qualified product, it is often necessary to increase the thickness of the plate and increase the weight of the material.
In addition, due to the difficulty of sealing, leakage is easy to occur and the leakage control is difficult, which o

Method used

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  • Half-mould forming process for metal plate material
  • Half-mould forming process for metal plate material

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Embodiment Construction

[0019] figure 1 It is the forming mold preparation stage. At this stage, the cavity of the die 1 is manufactured according to the shape of the workpiece to be processed. The parameters of the indenter 7 are: the cone angle of the indenter 7: α=70°, the fit between the indenter 7 and the storage cylinder 6 is clearance fit, and the diameter of the indenter 7 is 2mm smaller than the diameter of the workpiece. The solid particle pressure medium 5 used is natural sand. The sheet material 4 is placed between the upper binder ring 3 and the lower binder ring 2, and the solid particle pressure transmission medium 5 is filled in the storage cylinder 6, and a pressure F is applied to the upper binder ring 3 by a press, and the plate is pressed Material 4, to prevent the sheet material from wrinkling, and then apply a pressure P to the pressure head 7 through the press, so that the solid particle pressure transmission medium 5 generates a forming pressure, and the sheet material 4 is u...

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Abstract

A half-mould shaping technology for metallic plate features that the solid particles are used to replace the rigid male mould. It includes such steps as providing high-hardness steel balls with diameter less than 4 mm or natural sand as force transfer medium, making a female mould, loading a metallic plate in it, adding said force transfer medium on the plate, and using a pressing head to press them for the plastic deformation of metallic plate.

Description

technical field [0001] The invention relates to the technical field of thin plate forming, in particular to a half-mould forming process of metal sheet material. Background technique [0002] The traditional rigid punch-and-concave die drawing process requires multiple times of deep drawing to form deep drawn parts with a large drawing ratio, and the forming quality is poor. For the deep drawing of low plasticity and large deformation parts, it can't even be formed. To this end, people have proposed a half mold forming process (also known as sheet metal soft mold forming). [0003] The half-mold forming of the sheet metal is to use a certain force transmission medium as the punch (or die), and then use a rigid die (or punch) to make the sheet according to the shape of the rigid mold under the pressure of the pressure transmission medium. Forming process. [0004] In the half-mold forming process of sheet metal, the cold half-mold forming includes liquid forming with water...

Claims

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Application Information

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IPC IPC(8): B21D26/00
Inventor 赵长财
Owner YANSHAN UNIV
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