Laser drilling fixture and method for drilling holes on special-shaped tubular wall

Abstract

The invention discloses a laser drilling machining clamp and method for drilling in special-tube-shaped wall surfaces. The clamp comprises a base, a locating block and a mold core, wherein a locating part is arranged on the lower surface of the base; at least one side face of the base is a locating plane, a locating boss is arranged and extends in a longitudinal direction on the base; the locating block is arranged above the base and connected with the locating boss; the mold core is matched with the profile of a to-be-machined element, and used for arranging the to-be-machined element on the mold core in a sleeving manner so as to locate the to-be-machined element; a first locating hole matched with the profile of the lower end of the mold core is formed in the locating block; the mold core and the locating block are in insertion connection via the locating hole, and the lower surface of the to-be-machined element is attached to the upper surface of the locating block. By locating the to-be-machined element and aligning a first datum surface, a second datum surface and a third datum surface, a coordinate system of the element is enabled to coincide with a coordinate system of a machine tool, programming is simple, and traditional complicated coordinate transformation is avoided, so that the machining efficiency is high; besides, the element can be machined after shaped, therefore, the machining precision of hole positions in the element is guaranteed.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a laser drilling fixture and method for drilling holes on special-shaped tubular wall surfaces. Background technique [0002] For drilling holes on the wall of special-shaped tubular body, for example, refer to figure 1 , to process small holes on the wall of the curved profile of the impact tube on the aero-engine. In the prior art, the point coordinates of the holes on the curved surface after bending are generally converted into point coordinates on the sheet, and the holes are punched on the sheet. And then bending forming, because it involves converting the coordinates of the curved surface after forming into point coordinates on the sheet before bending forming, the coordinate conversion is complicated, and the algorithm is complicated. In addition, it is difficult to ensure the position accuracy of the hole after bending forming, which affects The processing quality of sma...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a laser drilling processing jig and method for drilling holes on special-shaped tubular walls to solve the problem of complex algorithms and the accuracy of hole positions being affected by the bending caused by the coordinate transformation required for the processing of small holes on the wall of existing impact tubes. Technical problems that cannot be guaranteed due to molding effects

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