Numerical control machining method based on rigid construction parts and clamping fixture for numerical control machining

Abstract

The invention aims to provide a method for processing rigid structure parts through digital control and a clamp structure for processing the rigid structure parts through the digital control. The method mainly comprises the following steps: performing rough machining on part blanks, processing a plurality of process lug bosses with the equal height on the periphery of the contour surface of the parts in the process of the rough machining, and processing a rigid connecting bridge between the process lug bosses and the contour surface of the parts to make the process lug bosses connected with the contour surface of the parts continuously. The process lug bosses are evenly distributed on the periphery of the contour of the parts according to the differences of the part structures, and the weaker parts of the part structures are provided with more process lug bosses properly. One of the advantages of the method is to use the process lug bosses combined with the parts to replace special fixtures so as to save the manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of aircraft manufacturing, in particular to the numerical control machining of aircraft fuselage frame parts, and is also applicable to a machining method and a numerical control machining fixture for numerical control machining of similar rigid structural parts. Background technique [0002] As we all know, the clamping and positioning of the parts to be processed in CNC machining is one of the key links that affect the processing quality and processing efficiency of the parts. Aircraft frame parts are typical rigid structural parts. The traditional clamping methods are roughly divided into two types. One is to directly mill the parts on the wool until the parts are processed and then separate from the wool. The advantage of this method is that it saves time. But the disadvantage is that after the parts are separated from the wool, the parts are greatly deformed and cannot meet the design requirements. Th...

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Problems solved by technology

The advantage of this method is that the clamping and positioning are fast, and the deformation of the parts has been improved compared with the previous method, but the effect of controlling the deformation of the parts is not good.

Furthermore, the development of tooling has a certain cycle, and in the trial production process, there is a certain coordination cycle between parts and tooling, which cannot meet the development cycle of parts.

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