Hole taking method for sheet metal part

Abstract

The invention belongs to a sheet metal machining technology, and particularly relates to a sheet metal part hole taking method. According to specific parts, the size of an unfolded blank is calculated, and blanking is carried out; a phi m hole is formed in the first pressing plate at the position of the other lightening hole according to the requirement of the first set of pattern die, and a phi n hole mgt is formed in the position of the lightening hole determined in the first step; n; a punching die is used for punching a phi n hole of a part, and the phi n hole in the part is used for positioning a punching die ejector pin when a lightening hole is punched. The pin inner hole can be prevented from being reserved in the part, and although the pin inner hole is located in the outline of the part, the auxiliary hole can be punched away finally through a punching scheme. By adopting the process method, the process hole can be prevented from being finally reserved in the part, and meanwhile, the designed strength requirement can be completely met after the part is formed.

Description

technical field [0001] The invention belongs to the sheet metal processing technology, and in particular relates to a hole-taking method for a sheet metal part. Background technique [0002] In the manufacture of large parts, due to design requirements, it is necessary to design and select a large number of relief holes, and the selection and size design of relief holes will inevitably affect the structural strength of the part itself. [0003] For the forming of existing large and complex parts with many lightening holes, the traditional method generally adopts the method of requiring the design of the inner hole on the part as the process hole. Using this process method, although the forming accuracy of the part can be guaranteed, the process hole will be Ultimately retained on the part, it will inevitably have a certain impact on its strength. There are many such parts in the fairing section of a certain type of machine. In view of the fact that the forming of such parts...

AI Technical Summary

Problems solved by technology

[0003] For the forming of existing large and complex parts with many lightening holes, the traditional method generally adopts the method of requiring the design of the inner hole on the part as the process hole. Using this process method, although the forming accuracy of the part can be guaranteed, the process hole will be Finally retained on the part, it will inevitably have a certain impact on its strength

There are many such parts in the fairing section of a certain type of machine. In view of the fact that the forming of such parts requires at least three pin inner holes to be positioned on the mold, it is possible to ensure that the parts will not be "pulled" during the forming process to conform to the part mold. The acceptance requirements of the cutting line, so too many pin inner holes are set, which can easily affect the structural strength of the part

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