Web notch structure machining structure

Abstract

The invention discloses a web notch structure machining structure. The web notch structure machining structure comprises the following steps: reserving a process boss above a notch of which the size is machined in place, wherein the boundary, in the width direction of the notch, of the process boss exceeds over 0.5 mm of the boundary of the notch; and removing the process boss until other characteristics of a web component are all machined in place. By utilizing the machining method disclosed by the invention, the notch structure can be subjected to numerical control machining stably; only a residue of 0.05 mm is remained at the edge of the notch; a bench worker only needs to do the work approximating polishing; the polishing amount is small; and a cutter is not easily rebounded in a benchworking process.

Description

technical field [0001] The invention relates to the field of metal cutting processing, in particular to the field of numerical control processing of aeronautical structural parts, and in particular to a method for processing a web notch structure. Background technique [0002] Aeronautical structural parts often have a web structure with a notch due to assembly requirements. However, when this web structure is CNC-machined, at the end position of the notch (such as figure 1 As shown), it is easy to cause the knife to be broached, resulting in parts quality problems. [0003] Traditional numerical control methods for such web structures such as figure 2 As shown, the web 1 of the part and the process boss 3 are connected by a sheet connection 2, and the process boss is pressed tightly during processing to ensure the rigidity of the structure with notches during processing, and then the process boss is removed by a fitter. And sand the edges in place. However, there are th...

AI Technical Summary

Problems solved by technology

However, there are three disadvantages in this processing: first, removing the boss will generate more fitter workload, which affects the processing efficiency of the part; second, although the rigidity of the part is guaranteed in the CNC process, it will pass the difficulty Fitter, when the fitter is grinding, the stiffness of the web is still poor, and the knife is easy to bounce during grinding, which requires a high level of fitter; third, the end face depends on the fitter to ensure the size and shape tolerance, and its accuracy is difficult to guarantee

In actual production, there are cases where parts are out of tolerance or even scrapped due to the fitter’s mistake in grinding the web notch

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