Aviation structural member digitization grinding method based on joint arm measuring apparatus

Abstract

The invention discloses an aviation structural member digitization grinding method based on a joint arm measuring apparatus. The aviation structural member digitization grinding method comprises the following steps: Step 1, a measuring scheme is planned, the appearance features of a semifinished product piece are analyzed, a scanning scheme is drawn, and the relative position of the joint arm measuring apparatus and a to-be-measured semifinished product piece is determined; Step 2, initialization operation before data acquisition is carried out; Step 3, according to the measuring scheme planned in the Step 1, the actual appearance point cloud of the to-be-measured semifinished product piece is obtained; the joint arm is utilized to scan the outer surface of the to-be-measured semifinished product piece in a combustion box through the point cloud data acquisition software so as to obtain the actual appearance point cloud of the to-be-measured semifinished product piece; Step 4, models are compared to conclude evaluation results of grinding allowances; Step 5, the processing path of a robot is planned; according to the grinding allowances of all parts of the to-be-measured semifinished product piece obtained in the Step 4, the grinding feed amount of each feed for grinding the robot is controlled, the processing path is planned, and the actual grinding process is guided. According to the invention, the aviation structural member digitization grinding method has the following characteristics: the grinding efficiency is improved, the measurement error is small, the measurement way is flexible, the scanning accuracy is high, the size is small, the weight is light, and the usage mode is flexible.

Description

technical field [0001] The invention relates to a digital grinding method for aviation structural parts based on an articulated arm measuring instrument, which is a grinding method for aviation structural parts by combining an articulated arm measuring instrument and a grinding robot, and can be used for aeroengine combustion chamber machines The grinding of box parts belongs to the field of digital measurement and computer integrated manufacturing. Background technique [0002] Aeroengine combustor casing parts are thin-walled parts with large size and complex shape. The key problem of using grinding robot for high-precision grinding of this kind of parts is the control of grinding amount. In the actual grinding process of casing parts, it is necessary to simulate the grinding path of the robot based on the CAD model of the workpiece and the approximate shape of the blank. The theoretical grinding amount of each step in the workpiece processing process is determined by th...

AI Technical Summary

Problems solved by technology

This simulation processing method does not take into account the actual shape of the blank before finishing, and it is unreasonable to use the approximate shape of the blank to simulate the grinding feed for each pass

Because in the actual grinding process, some processing surfaces that have already met the precision requirements still need to be ground by the grinding robot, resulting in a large amount of time consumption in the high-precision grinding process, resulting in a reduction in grinding efficiency

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