Positioning and clamping device for machining inclined hole in annular part and method of positioning and clamping device for machining inclined hole in annular part

Abstract

The invention discloses a positioning and clamping device for machining an inclined hole in an annular part and a method of the positioning and clamping device for machining the inclined hole in the annular part. The positioning and clamping device comprises a positioning piece, a cylinder is integrally formed on the positioning piece, a first drill hole and a second drill hole are formed in the side face of the cylinder, the first drill hole is obliquely formed away from the machining face of the positioning piece, the inclination angle between the first drill hole and the machining face of the positioning piece is equal to the inclination angle between the first inclined hole in the annular part and the placing face, the first drill hole and the second drill hole are symmetrical with respect to the central axis of the cylinder, a first datum plane and a second datum plane are arranged on the side edge of the positioning piece, the first datum plane and the first drill hole complementeach other relative to the machining face of the positioning piece, the first datum plane and the second datum plane are symmetrical with respect to the central axis of the cylinder, and a fixing andclamping device is further arranged on the positioning piece and used for fixing the annular part. According to the positioning and clamping device, the annular part circumferential positioning is accurate, the indexing mode is simple, a drill bit is not prone to slipping, the structure is reasonable and simple, and the machining requirement of the annular part inclined hole is met.

Description

technical field [0001] The invention belongs to the field of mechanical processing, in particular to a positioning and clamping device and method for processing inclined holes inside ring parts. Background technique [0002] The nozzle is one of the parts of the engine. It is a ring. There are two bosses symmetrically arranged on the outer ring, and a ring groove is opened on the inner ring. Slanted holes are symmetrically arranged on the surface of the ring groove and the aforementioned inclined holes penetrate the bosses. Does not go through the boss, the plane where the center line of the inclined hole coincides with the plane where the center line of the boss is located, and the center line of the inclined hole is too close to the edge of the inner hole at the upper end of the nozzle, and this distance is smaller than the outer diameter of the machine drill chuck, so it can only be used Extended drill bit processing, the processing of this ring part adopts ordinary bench...

AI Technical Summary

Problems solved by technology

[0002] The nozzle is one of the parts of the engine. It is a ring. There are two bosses symmetrically arranged on the outer ring, and a ring groove is opened on the inner ring. Slanted holes are symmetrically arranged on the surface of the ring groove and the aforementioned inclined holes penetrate the bosses. The plane where the centerline of the inclined hole coincides with the plane where the centerline of the boss is located, and the distance between the centerline of the inclined hole and the edge of the inner hole at the upper end of the nozzle is too close, and this distance is smaller than the outer diameter of the machine drill chuck, so it can only be used Extended drill bit processing, the processing of this ring part adopts ordinary bench drill, but because there is no straight line section on both sides of the boss, only the distance dimension of the end of the boss is required, and the arc size tolerance on both sides of the boss is too large, the circumferential positioning It is not easy to realize, and at the same time, the diameter of the inclined hole on the inner ring is small, and the extended drill bit is easy to slip and bend during processing, and it is difficult to meet the processing size requirements; and because the inclined hole is symmetrically arranged, the operator basically designs according to the usual indexing method, that is, the shaft pin At present, the ring part is processed with an ordinary bench drill, and the center line of the processed hole must be perpendicular to the machine table, and the clamping device is fixed by the pressure plate part on the ordinary bench drill. The structure is complex and the volume is large. If After processing one of the inclined holes, rotating the nozzle 180° to re-clamp will cause errors, and the indexing method is difficult to determine. Therefore, a new positioning and clamping device is urgently needed to meet the operation of opening inclined holes on the nozzle ring.

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