A Rapid Measurement of Laser Focus of Circularly Distributed Group Holes and Its Group Hole Processing Method

Abstract

The invention discloses a rapid laser focus measuring and machining method for annulus distributed group holes. Firstly, a focus measuring numerical control program is determined according to the measuring of the positions of design drawing holes and distance measurement sensor focuses, then the used hole focuses are measured by using the focus measuring numerical control program, and a hole forming and machining numerical control program is generated, so that the hole forming efficiency and quality of the annulus distributed group holes of an aero-engine combustion liner; a group hole focus measuring program is written to measure the positions of single hole focuses one by one, so that the effective basis can be provided for subsequent formal machining of the group holes and the machiningefficiency can be greatly improved; the positions of the single hole focuses are measured one by one by using the group hole focus measuring program, so that the group hole focuses of a gas film canbe effectively corrected and the machining quality of the group holes can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of laser hole making, and relates to a rapid measurement of laser focus of ring-distributed group holes and a method for processing the group holes. Background technique [0002] At present, the laser focus is mainly positioned by means of the distance sensor during laser drilling. The specific method is: the relative position of the distance sensor and the laser head is fixed, and the relative position of the distance sensor focus and the laser beam focus is also fixed. The axis finds the focus coordinates of the ranging sensor, and then moves the machine tool coordinates to the laser focus according to the relative positional relationship between the sensor focus and the laser beam focus, and then the laser hole can be made. For a single hole, the method is simple and convenient, and the hole-making quality and efficiency are also high. [0003] However, there are the following problems for the hole makin...

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Problems solved by technology

[0004] 1. The part of the aero-engine flame tube is thin, about 2.2mm, and the size is large, with a diameter of about 600mm. The deformation of the flame tube is large after machining, which causes the positions of the surface of the flame tube group holes in the direction of the laser beam to be different. Therefore, the focus coordinates of the laser are also different. If only the focus of a single hole is found, the laser head does not move, and then the part is turned to process a group of holes, the quality of the hole will be affected by the deviation of the laser focus of some holes, and the part will be scrapped;

[0005] 2. Aeroengine flame tube parts have a large number of air film holes, about 10,000. If each hole is made like a single hole, the efficiency is extremely low

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