Machining method of U-shaped sheet metal part resilience mould tire

Abstract

The invention discloses a machining method of a U-shaped sheet metal part resilience mould tire; the method comprises the following steps of: (1) reversely scanning each resilience mould tire tangent plane full pattern to obtain the two-dimensional data of each resilience mould tire tangent plane full pattern; (2) smoothing the two-dimensional data of each resilience mould tire tangent plane full pattern; (3) converting two-dimensional line data into a three-dimensional space by taking a datum line and a positioning line as the coordinating benchmark according to the position relation among the resilience mould tire tangent plane full patterns; (4) building the resilience shape curved surface of the U-shaped sheet metal part by the line of each resilience mould tire tangent plane full pattern in the three-dimensional space; (5) designing a three-dimensional resilience mould tire digifax by the resilience shape curved surface of a U-shaped sheet metal part; and (6) digitally milling the resilience mould tire by three-dimensional resilience mould tire digifax programming. According to the machining method, the manual machining of the resilience mould tire is replaced with the CNC (computer numerical control) machining, so that the work efficiency and the machining precision can be greatly improved.

Description

technical field [0001] The invention relates to a processing method for a resilient molded tire for aircraft sheet metal parts. Background technique [0002] For large-curvature skin U-shaped sheet metal parts, due to the large curvature, after the parts are molded, the parts will spring back, such as figure 1 shown. In order to eliminate the impact of springback on parts, it is usually necessary to make a transitional mold that is slightly smaller than the molded tire of the part according to the empirical value, that is, the springback molded tire. The cross section of the part opening is smaller than the normal value of the part. Although the elastic tire is narrower than normal parts when it is formed, due to the spring back, when the part is removed from the elastic mold tire, the part will basically rebound to the normal width, as long as the part at this time is placed on the part mold tire After a simple correction, the processing of the part is completed. [...

AI Technical Summary

Problems solved by technology

[0003] At this stage, the springback mold tires of U-shaped sheet metal parts are provided by the sheet metal production plant according to the experience value, and the mold line workshop will process the springback cut surface samples according to the actual samples of the springback mold tire cut surfaces, and then The workers of the mold tire production factory manually manufacture the springback molded tires according to the template of the springback section. During the processing, the workers have to repeatedly use the streamline ruler to correct the radian of the molded tire surface. The molded tires with large curved surfaces and complex treads are more difficult to process. , this processing method is time-consuming and labor-intensive, and there is a hidden danger of inaccurate tread quality.

Images