Single-face clamping hole forming method of double-side stepped hole part

Abstract

The invention discloses a single-face clamping hole forming method of a double-side stepped hole part, and belongs to the technical field of hole processing. The single-face clamping hole forming method main comprises the following steps that S1, an upper counterbore, a stepped hole and a lower counterbore are subjected to rough milling; S2, the lower counterbore is subjected to milling; S3, the upper counterbore and the stepped hole are subjected to fine boring, a boring tool is mounted, the knifepoint direction of a tool bit of the boring tool is confirmed when SPOS of a machine tool is 0, the knifepoint direction is adopted as the forward direction of the X axis, then, the boring tool stretches along the Y axis into the upper counterbore and the stepped hole to perform boring, after boring, the machine tool stops, the tool bit of the boring tool still points the forward direction of the X axis, then, the boring tool retracts in the negative direction of the X axis, L1 equals to 0.1mm, and then, the boring tool retracts upwards along the Y axis; and S4, the lower counterbore is subjected to reverse boring. According to the single-face clamping hole forming method, the upper counterbore is bored to the required size in a set boring manner, the stepped hole is bored to the required size in a set boring manner, the lower counterbore is bored to the required size in a set boringand reverse boring manner, the clamping and datum transformation times is decreased, precision like surface roughness and coaxiality of to-be-processed holes is guaranteed, and hole processing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of hole processing, in particular to a hole-making method for double-sided stepped hole parts with single-sided clamping. Background technique [0002] With the development of aviation technology, the performance indicators of modern aircraft such as maneuverability, flight performance, service life and low manufacturing cost have been continuously improved. Aeronautical structural parts have gradually developed in the direction of large-scale, integrated, thin-walled and complicated The requirements have been greatly improved, especially in the precision holes that require high dimensional accuracy and high positional accuracy. Double-sided stepped holes generally exist on aviation integral frame beams and joints, and are mainly used for assembling core components such as high-precision transmission shafts, heavy-duty bearings, bushings, etc., with double-sided counterbore and stepped through holes. The co...

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Problems solved by technology

[0004] (1) The coaxiality of the hole cannot be guaranteed: the plan of boring and countersinking on both sides and the positioning of the stepped hole is adopted, and the stepped holes on both sides are processed and formed in two clamping states respectively, due to errors caused by clamping, alignment, and part deformation , so that the coaxiality of the three holes cannot be guaranteed, thus affecting the assembly accuracy

[0005] (2) Low processing efficiency: the current boring process mostly adopts the method of low-speed boring in and out, and the trajectory is as follows: figure 2 shown

This boring method has slow tool retraction speed, low processing efficiency, and secondary cutting at the same time, which is easy to produce processing scratches on the hole wall; due to the hole making on both sides, the hole making process is performed twice, the processing process is cumbersome, and the number of tool preparations increases. , reducing the processing efficiency of the entire part

[0006] Since the double-sided stepped hole structure has three typical structures: upper sink hole, stepped hole and sink hole, the current double-sided machining method is used, and the rough milling hole is also performed on two sides, and the processing process is cumbersome.

Due to the problems of unguaranteed coaxiality and low processing efficiency, the existing double-sided stepped hole processing scheme can no longer meet the current processing needs, and an efficient and high-quality process method is urgently needed to improve the stability of double-sided stepped hole processing, thereby Guaranteed high-performance machining of such structures

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