Mechanical processing industry, due to the poor, rigid walled workpieces produced in the process of turning to vibration and deformation, its instances.some dimensional tolerance and not guaranteed, if not, even when solving method makes processing cannot proceed.

1、Processing problem
Thin walled workpieces is turning in more difficult problem, the reason is rigid, intensity of thin-walled parts processing, extremely easy to make the parts increase form &position errors, ensure the quality of parts processing.
Therefore, the clamping thin-walled parts, turning tools selection and reasonable choice of cutting dosages, puts forward the strict request. We processing of stainless steel tube is a thin on the takeover mouth thermal shock tube, as shown in figure 1. The large diameter workpieces belongs to 292mm outer walled workpieces, pipe materials, Z2CND17-12 point nitrogen stainless steel, wall thickness, workpiece presidents than 4mm requirements 550mm (left) clamping allowance, roundness, all required 0.05 mm surface roughness Ra = 6.3 muon m, determines the workpiece precision coefficient is high.

2、The machining process
(1) increasing process, chuck 550mm extended from the length of finished product to 610mm.
(2) processing phase:
1、The early stage. Adopts thick and thick bore to remove surplus. Moldings, optimizing and feeding can take some, Finishing, optimizing 0.5 mm in general 0.2 ~ commonly, feed 0.1 ~ 0.2 mm in small, even more/r, cutting speed 6 ~ 120m/min, as far as possible when the car with the high speed cutting, but is unfavorable and exorbitant.
2、Half processing stage. As the main surface finishing to prepare some secondary surface finish, the processing, the car by half fine machining precision in before the precision and achieve necessary limits.but. If the pipe in the clamping chuck when greatly too forcibly, can make the thin-wall parts, components deformation of the roundness error. If not in the chuck and tighten the chances are that in turning loose and scrap parts. We take the rough and fine when clamping car clip to control parts of loose some deformation. Half machining stage optimizing somes small, the internal stress of stainless steel tube wall, reduce the release of deformation precision.