A mechanical pressure loading method suitable for superplastic forming process
A technology of superplastic forming and mechanical pressure, which is applied in the field of precision sheet metal processing, can solve the problems of low efficiency, poor stability of mechanical pressure, and reduce the service life of superplastic forming molds, so as to achieve a high degree of automation, prolong the service life, and reduce labor costs. cost effect
Active Publication Date: 2021-01-08
BEIJING HANGXING MACHINERY MFG CO LTD
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This is not only inefficient, but also has poor mechanical pressure stability, which will reduce the service life of the superplastic forming mold
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[0028] A mechanical pressure loading method suitable for superplastic forming process, the steps are as follows:
[0029] (1) Design and manufacture superplastic forming molds according to the size of aluminum alloy or titanium alloy parts. The cavity of the aluminum alloy or titanium alloy superplastic forming mold is appropriately enlarged or reduced according to the size of the part; the designed and manufactured aluminum alloy or titanium alloy superplastic forming mold includes a cavity part and a blank holder part.
[0030] (2) According to the structure of aluminum alloy or titanium alloy parts, determine the air pressure loading method of superplastic forming. The air pressure loading is carried out in the form of a loading curve, which is mainly a curve of air pressure changing with time. The air pressure loading curve mainly includes the pressurization stage, the pressure holding stage and the pressure relief stage.
[0031] (3) Calculate the initial blank-holding ...
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The inventio relates to a mechanical pressure loading method suitable for a superplastic forming process, and belongs to the technical field of precise metal plate processing. The mechanical pressureloading method suitable for the superplastic forming process comprises the following steps of designing and manufacturing a superplastic forming die according to the shape and the size of a part to beprocessed; determining a superplastic forming air pressure loading curve according to the structure of the part to be processed; calculating an initial blank holder force and a maximum die locking force required for superplastic forming according to the superplastic forming die; calculating a superplastic forming mechanical pressure loading curve of the part to be processed according to the initial blank holder force and the maximum die locking force; placing the part to be processed into a die on a superplastic forming pressure machine workbench, simultaneously operating the superplastic forming air pressure loading curve and the superplastic forming mechanical pressure loading curve in a superplastic forming pressure machine, and starting to carry out superplastic forming; and after finishing the operation of the superplastic forming pressure machine, accomplishing the superplastic forming of an aluminum alloy and a titanium alloy. According to the mechanical pressure loading methodsuitable for the superplastic forming process provided by the invention, the mechanical pressure can be linearly uniformly continuously loaded, the stability of mechanical pressure can be improved, and the product quality and the qualification rate are improved.
Description
technical field [0001] The invention relates to a mechanical pressure loading method suitable for a superplastic forming process, which belongs to the technical field of precision sheet metal processing. Background technique [0002] Aluminum alloy or titanium alloy superplastic forming technology is an advanced lightweight and integrated forming technology. In the superplastic forming process of aluminum alloy or titanium alloy, in order to ensure the normal pressure loading of superplastic forming, it is necessary to apply mechanical pressure to the superplastic forming mold. Due to the continuous change of air pressure in superplastic forming during the forming process, manual continuous intermittent operation is required. This is not only inefficient, but also has poor mechanical pressure stability, which will reduce the service life of the superplastic forming mold. Contents of the invention [0003] The technical problem solved by the present invention is: to overc...
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IPC IPC(8): B21D26/02
CPCB21D26/02
Inventor 刘伟李保永秦中环刘奇刘玉平
Owner BEIJING HANGXING MACHINERY MFG CO LTD