A Method for Precise Machining of Dual Small Holes

Abstract

The invention belongs to the field of hole machining, and particularly relates to a coupling hole precision machining method. The method includes clamping a workpiece on a rotary workbench of a five-coordinate numerical-control drilling machine, machining a first hole of coupling holes in a numerical-control manner, detecting the actual internal contour of the first hole in a layered manner through a contact probe, calculating the actual axis of the first hole by the least square method, reversely calculating the drilling point coordinate of a second hole according to the design parameter requirements of colliding points, regenerating the numerical-control machining program of the second hole, and machining the second hole automatically. According to the method, on the basis of an integral strategy of measurement and processing, contour measurement, data processing and hole machining of the coupling holes can be completed by clamping the workpiece once, the machining requirements for colliding precision of coupling holes with different diameters and inclined angles can be met, machining efficiency is high, precision consistence is high, 'zeroing' processing of machining errors is performed on the colliding points, and coupling hole precision machining is realized.

Description

technical field [0001] The invention belongs to the field of small hole processing, in particular to a method for precision processing of dual small holes. Background technique [0002] With the continuous improvement of the service performance of aerospace equipment, higher requirements are put forward for the manufacturing quality of liquid rocket engines. The injector disk is one of the key parts of large liquid rocket engines, and it is also a difficult part to machine. Hundreds of pairs of small holes with different diameters and sizes are designed on the injector disk to form a hole array, so as to realize high-speed collision and rapid atomization of combustion agent and oxidant after high-pressure injection, and form a stable combustion surface. In order to ensure the atomization effect and the stable combustion of the medium, the collision accuracy of the paired small holes is very important. It is required that the actual axes of the two paired holes after process...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to overcome the shortcomings of the above-mentioned traditional processing methods, aiming at the problem that the spatial position accuracy of the collision point is difficult to guarantee due to the accumulation of processing error terminals in the process of processing the dual small holes, a precision processing method for the dual small holes is invented.

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