Case deep hole processing method and application thereof

Abstract

The invention discloses a case deep hole processing method and application thereof in aluminum-magnesium case deep hole processing. The case deep hole processing method comprises the steps of (S1) processing a pilot hole; and (S2) peck drilling and cycling. The peck drilling and cycling step comprises the steps of firstly controlling a long drill bit to enter the pilot hole at low rotary speed; when at a predetermined safety distance away from the working allowance, increasing the rotary speed to the processing rotary speed, then carrying out peck drilling processing, pausing for the predetermined time after drilling for the depth which is 1 to 2 times of the diameter of the drill bit every time in the peck drilling process every time, breaking a produced continuous chip and discharging out of a hole port through the feeding pause of the long drill bit, and retreating the long drill bit to the position at the predetermined drilling depth far away from a drill hole port after peck drilling for the predetermined depth every time so as to remove chips and cool; and repetitively circulating until processing to the target depth. According to the method, in the deep hole peck drilling circulating process, pause and chip breaking is adopted, the position of drill bit retraction is controlled, and the pilot hole is used for guiding and supporting the long drill bit, so that the problems of deflection and unsmoothness in chip removal are effectively avoided, and the processing quality and the stability are ensured.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a deep hole processing method. In addition, the present invention also relates to an application of the above-mentioned casing deep hole processing method in the processing of aero-engine aluminum-magnesium casing. Background technique [0002] There are a large number of deep holes in the large and complex aluminum-magnesium casing of the aero-engine. The degree cannot be greater than 0.2mm. [0003] In the existing processing method, when the deep hole pecking drilling cycle is used, there is no chip breaking at a depth of 2-3 times the diameter of the drill bit, and the aluminum-magnesium alloy material is soft, and it is easy to form curly strip-shaped chips. When it is shallow, the chips can be discharged through the spiral groove of the drill bit. When the length-to-diameter ratio is more than 10 times, the chips are easily blocked in the spiral groove and c...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a casing deep hole processing method and its application in deep hole processing of aluminum-magnesium casings of aero-engines, so as to solve the above-mentioned difficult problem of deep hole processing of aluminum-magnesium casings and effectively avoid the deflection and displacement of the drill bit. The chip is not smooth, ensuring the processing quality and stability, reducing the number and distance of tool retraction, and improving the processing efficiency of the deep hole of the aluminum-magnesium alloy casing