Processing device

Abstract

A processing device (10) for machining a workpiece (W) having a shaft hole (WH) and blades which are arranged around the shaft hole, comprising a rotary table (28) on which the workpiece W is mounted so that the axis the rotary feed shaft (C) coincides with the axis of the shaft hole WH of the workpiece W, a contact element (36), of which a circular end surface is abutted against the workpiece (W), an upper clamping device (30) supporting the contact element (36) in a rotary mode and pressing the contact element against a rotary bench (28) with a contact element (36) and pressing the workpiece (W) against the rotary bench (28) with the contact element (36), an inclination bench (26) provided with the rotary bench (28) and the upper clamping device (30) and an inclination feed shaft (A) made the inclination bench (26) to incline.

Description

technical field [0001] The present invention relates to a machining device capable of machining a shaft hole and blades of a workpiece having a shaft hole and blades arranged around the shaft hole in the same process with high precision. Background technique [0002] Turbocharger for 200000min -1 Such a very high speed rotation requires the machining accuracy of the impeller of the compressor, especially the coaxiality of the shaft hole and the blade to have a very high precision. As a technique for machining the concentricity between the shaft hole of the impeller and the vane with high precision, Japanese Patent No. 5468556 describes a working machine for milling a compressor impeller of a turbocharger. Machining involves fitting protrusions into the center hole of a workpiece that has an outline and a center hole in order to manufacture an impeller, positioning and fixing the workpiece, and machining the blade. [0003] In addition, Japanese Patent Application Laid-Open...

AI Technical Summary

Problems solved by technology

Regarding this point, in the invention of Japanese Patent Application Laid-Open No. 2013-139066, starting from the state held by the first chuck, the turning of the outer periphery of the workpiece, the penetration of the shaft hole, and the milling of the vane are all performed together. Therefore, the processing accuracy, especially the coaxiality between the shaft hole and the blade, is improved, but the processing device becomes a special machine equipped with a turning head or a second workpiece processing head other than the milling head, which becomes very complicated.

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