Special fixture of drill blade top centre hole for blade

Abstract

The invention relates to a special clamp for drilling a blade tip centre hole and used for a blade. The special clamp is suitable for drilling blade tip centre hole of the blade with a plurality of sizes and has wide range of application. The special clamp comprises a jig body, an upper drill plate, a drill bush. The jig body is internally provided with a locating base; the two sides of the locating base and the side wall of the jig body are provided with a side locator key; the special clamp is characterized in that: the two side of the upper drill plate is embedded on the side locator key; the bit bush is inverted on the upper drill plate; the exit and the opening of the bit bush are arranged on the bottom of the upper bit panel; the jig body, the locating base and the upper drill plate have the same centre.

Description

(1) Technical field The invention relates to a jig for drilling a center hole, which belongs to the technical field of clamping equipment, in particular to a special jig for drilling a center hole of a blade tip for a blade. (2) Background technology With the introduction of five-coordinate CNC machining centers in domestic blade processing enterprises, the processing method of the blade profile has changed from blade root and profile positioning, fixed milling processing, to blade root, blade top center hole positioning, and rotation around the center of the blade profile line. processing. This new process method requires machining a center hole in the center of the blade top before machining. The commonly used traditional method is: for each type of blade, design a separate horizontal drilling center hole fixture, locate the blade heel and blade top process reference plane, and process the blade center hole. Its disadvantages are: 1. Because the blade is placed horizonta...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. Because the blade is placed horizontally, after the blade root is positioned, the blade top droops due to gravity. In order to ensure the machining accuracy, the process datum plane must be processed near the blade top, which increases the processing steps of the blade and leads to processing hours. , the increase in circulation and processing costs; 2. When the blade uses a horizontal drilling center hole fixture, in the height direction, there are both blade root and process reference plane positioning, resulting in over-positioning and affecting positioning accuracy; 3. Each type of drilling center The jig can only be used for one type of blade, and a large number of jigs for drilling center holes must be designed and manufactured

This not only causes a waste of metal materials and increases processing costs, but also a large number of drilling center hole fixtures are not conducive to the management of tooling on the production site, and the placement of