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Numerical control brake-pressing method considering springback compensation

A processing method and springback compensation technology, applied in the direction of digital control, electrical program control, etc., can solve the problems that cannot meet the accuracy of brake forming of aviation sheet metal parts, different materials, etc., achieve intuitive and accurate relationship tables, and eliminate errors , The effect of saving materials

Active Publication Date: 2013-08-28
SHANGHAI AIRCRAFT MFG
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Problems solved by technology

However, due to the deviation between theoretical calculation and actual processing size, each batch of materials will be different, and sheet metal parts have more factors affecting springback than pipe fittings, so this method cannot meet the requirements of aviation sheet metal parts. The accuracy of the brake forming of the parts cannot meet the requirements of today's aviation manufacturing and development

Method used

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  • Numerical control brake-pressing method considering springback compensation

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Embodiment

[0018] The numerical control brake pressure processing method considering springback compensation in this embodiment includes the following steps:

[0019] The first step is to make the gate pressure test plate according to the material and thickness of the gate pressure parts.

[0020] The material of the sheet metal part to be formed by brake pressing in this embodiment is SUS301 stainless steel with a thickness of 0.8 mm, and the rolling direction of the sheet metal part is divided into two directions of 0° and 90°. Among them, the sheet metal parts in the 0° direction need to be pressed into 150°, 132°, 120° and 115°, and the sheet metal parts in the 90° direction need to be pressed into 145, 130°, 124° and 116°. According to the material and thickness of the sheet metal parts to be pressed and formed, the experimental sheet material used in this embodiment is SUS301 stainless steel, with a thickness of 0.8 mm, a length of 150 mm, and a width of 50 mm.

[0021] In the sec...

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Abstract

The invention relates to a numerical control brake-pressing method considering springback compensation and belongs to the field of machining technologies. The method includes: producing a brake-pressing experiment board according to the material and thickness of a brake-pressed part; establishing a table of relation between brake-pressing depth and brake-pressing angle in actual brake-pressing through experiments; during brake-pressing a sheet metal part into a part, according to required brake-pressing angle of the sheet metal part, searching in the table of relation to find brake-pressing depth corresponding to the required brake-pressing angle of the sheet metal part, and allowing the brake-pressing depth to serve as machining depth; and brake-pressing the sheet metal part until the machining depth by a numerical control brake-press so as to obtain corresponding brake-pressing angle and complete numerical control brake-pressing. The method has the advantages that errors caused by brake-pressing springback can be reduced without trial brake-pressing before the brake-pressing and accordingly machining efficiency is improved.

Description

technical field [0001] The invention relates to a numerical control gate pressure processing method considering springback compensation, belonging to the technical field of machining. Background technique [0002] Due to the good versatility, simple process and wide process range of the gate forming die, it is widely used in sheet metal processing. The brake pressure process is the last process of forming most parts (except the welding process), and it is also the most important process. The quality of the brake pressure process directly affects the final formed size and appearance of the product. [0003] Usually, the elastic rebound of the brake press parts after forming will have a great impact on the accuracy of the bending parts, so that the precision of the brake press parts is not very high. The current conventional gate pressure processing method adopts the method of manual measurement and testing of the gate pressure. In this method, the workers artificially estima...

Claims

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Application Information

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IPC IPC(8): B21D7/12G05B19/19
Inventor 徐应强刘垒杨志恒鲍益东张显藤舒阳胡丹姜丹丹陈明和谢兰生
Owner SHANGHAI AIRCRAFT MFG
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