Off-line positioning and reference correction device for blades with journals

Abstract

An off-line positioning and reference correction device for blades with journals, which is used for positioning and correcting blades with journals that have completed batch milling. The blades with journals include blade journals, blade angular surfaces , which includes a blade positioning module, a blade measuring module, a quick-change tooling, a six-channel measuring instrument, switches and buttons arranged on the bottom plate. The invention provides an off-line positioning and datum correction device for blades with journals. Use the four corner points of the blade body to locate and correct the datum of the blade, so that the margin of the blade under the new datum can be evenly distributed, and the 3R quick-change fixture can be used to complete the alignment and clamping during the process of measuring the blade, which can facilitate the basis The machining allowance after batch milling is used to group the blades, which improves the processing consistency of the blades before CNC polishing, which is beneficial to the subsequent array synchronous polishing.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a device capable of performing self-adaptive positioning and datum correction on blades with journals according to machining allowances during the processing of blades of aero-engines. Background technique [0002] In the manufacturing process of aeroengine compressor blades, milling is one of the important processes. In this process, there are various machining errors that will lead to deformation of the blade machining, and the uneven distribution of the margin under the original benchmark. There are mainly machine tool adjustment errors, clamping errors, and process system errors before processing; force deformation errors, thermal deformation errors, and tool wear errors during processing; errors caused by residual stress after processing. Under the overall effect of these errors, different degrees of bending and torsion deformation, chord length error, and thickness erro...

AI Technical Summary

Problems solved by technology

However, it is unavoidable that although the blades have met the design tolerance requirements in the pre-polishing process, due to the existence of processing deformation, there will still be surface differences when batch polishing is performed after batch milling of blades, resulting in final batch processing. The polishing pass rate and efficiency will be affected to a certain extent. The factory's traditional practice is to use the sample method to test the light transmission of the milled blades, and then group them according to the margin marks and lines, and then perform manual polishing in batches.

This method is inefficient, labor-intensive, and depends on the experience of the operator, resulting in unstable quality

Images