A turning method for thin-wall weakly rigid sheet-welding parts with ceramic coating

Abstract

A lathe processing method for thin-walled weakly rigid sheet-welding parts with ceramic coating. The method uses cushioning parts to wrap the parts during lathe processing of thin-walled sheet metal parts, and the disc limits the outer mounting edge. Increase the rigidity of the thin-walled and weakly rigid sheet-welding parts with ceramic coating during the turning process, and reduce the vibration of the knife; use the turning method of small feed rate machining and small margin first to reduce the damage to the coating surface of the parts, Protect the integrity of the coating; the processing method of processing the mounting edge with a small margin first and then processing the mounting edge with a large margin can avoid the excessive tolerance of the axial dimension and wall thickness, shorten the processing cycle at the same time, and avoid large deformation of the machined parts and require a large Correct damage to the processed surface, coating peeling off, etc., reduce parts repair, shorten the turning cycle from the original 7-9t to the current 2-4t, and greatly reduce the workload of correction. In addition, the related devices set by the present invention are simple in structure , low processing cost, fast and stable clamping, convenient and quick disassembly.

Description

technical field [0001] The invention belongs to the technical field of mechanical cold working, and in particular relates to a turning method for thin-wall weakly rigid sheet-welding parts with ceramic coating. Background technique [0002] Such as figure 1 As shown, the assembly process of aero-engine components involves the welding of a large and complex thin-walled sheet metal part. After the welding is completed, the inner surface needs to be sprayed with high-temperature ceramics. After sintering at a high temperature above 1000 ° C, the deformation at the exit of the part Large, there needs to be a margin for machining after ceramic treatment. Feedback during the post-machining process shows that the thin-walled sheet metal parts vibrate severely, resulting in ceramics falling off. The axial dimension and wall thickness dimension of the mounting edge are related to each other and limited by the structure. The processing is difficult, frequent out-of-tolerance, and the...

AI Technical Summary

Problems solved by technology

Feedback during the post-machining process shows that the thin-walled sheet metal parts vibrate seriously, which leads to the ceramics falling off. The axial dimension and wall thickness of the mounting edge are related to each other and limited by the structure. Stable, the part number is reflected in the processing process and affects the processing progress and processing quality

Because there is no finalized process in the machining process of this part, it is difficult to fix the sheet metal parts, and the lathing process is carried out in a free state at the exit, resulting in large deformation of the parts, poor surface quality of inner and outer layers, severe knife vibration, and ceramic coating near the machined surface. Severe layer shedding and uneven gap at the exit will increase the workload of follow-up repairs

The axial dimensions of the parts are related to each other. Due to structural limitations, it is not appropriate to leave too large a machining allowance on the mounting edge, and after multi-layer welding and high-temperature coating parts are deformed, resulting in large jumps at the mounting edge of the part; when machining the axial dimension, follow the The conventional process first processes the height of the inner mounting edge. When processing the middle and outer mounting edges, there are often insufficient height and wall thickness margins, resulting in unqualified height dimensions and wall thickness dimensions, which affect the performance and performance of the engine. Operating life

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