Variable-angle elliptical vibration-laser forming device and method for CBN grinding head preparation

Abstract

The invention discloses a variable-angle elliptical vibration-laser forming device for a CBN grinding head preparation. The variable-angle elliptical vibration-laser forming device for the CBN grinding head preparation comprises a variable-angle elliptical vibration device, a micro-grinding head substrate workbench, a vibration supporting platform, a laser cladding device and a mechanical arm, andis characterized in that the variable angle elliptical vibration device is arranged on the vibration supporting platform, the micro-grinding head substrate workbench is connected with the variable-angle elliptical vibration device through a double-head stud, the driving end of the mechanical arm is connected with an external driving device, and the free end of the mechanical arm is fixedly connected with the laser cladding device through bolts. The elliptical vibration of the micro-grinding head substrate workbench is realized by changing a single-direction vibration mode, so that the metal binding agent is more uniform in grain refinement in the laser forming process, air holes are reduced, and the service life of the CBN micro-grinding head is further prolonged; secondly, the included angle between two variable amplitude rods in the horizontal plane can be changed to achieve different elliptical vibration modes, so that the vibration included angle corresponding to the fine grain refining effect of the metal binding agent is obtained; different types of structural CBN micro-grinding heads can be obtained by changing laser cladding process parameters and scanning paths accordingto different requirements, so that the diversification of products is effectively increased, and the product can be better applied to different finish machining fields; and the device is small in structural control difficulty and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of superhard abrasive tool processing, and in particular relates to a variable angle elliptical vibration-laser forming device and method for preparing CBN grinding heads. Background technique [0002] In recent years, with the continuous improvement of the manufacturing level, precision and ultra-precision machining technology has attracted more and more scholars' attention. Especially for some difficult-to-machine metal materials, due to the affinity between metal elements (iron group elements) and diamond during processing, the processing stability of traditional diamond abrasive tools decreases. Therefore, CBN abrasive tools, which are second only to diamond hardness, should be used And born. However, for most electroplated metal bond CBN abrasive tools, the service life of the abrasive tool is greatly shortened due to the uneven distribution of abrasive grains on the surface of the abrasive tool and in...

AI Technical Summary

Problems solved by technology

At present, laser cladding technology has improved the preparation efficiency and service life of CBN abrasives to a certain extent, but the performance of the CBN abrasives prepared by it has not reached the optimal level, especially the holding strength of abrasive grains and metal bonds is not enough.

Therefore, the ultrasonic vibration auxiliary field is introduced to refine the grains of the metal bond. However, the ultrasonic vibration applied currently is in a single vibration direction. Although it plays a certain role in the grain refinement of the metal bond, the degree of refinement Insufficient homogeneity and difficult to obtain optimal degree of grain refinement for different metal binders

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