Laser trimming method for super-abrasive grinding wheel

Abstract

The invention discloses a laser trimming method for a super-abrasive grinding wheel, comprising the following steps: a, a grinding wheel is mounted on a numerical control grinding machine and is driven to rotate; b, a laser displacement sensor is aligned to the surface of the grinding wheel, does axial feeding movement relative to the grinding wheel and scans the surface of the grinding wheel, scanning data is input into a computer storing an ideal profile of the grinding wheel to form an actual profile of the grinding wheel on the surface, the actual profile is compared with the ideal profileof the grinding wheel to obtain a distribution condition of allowance removal; c. the computer sends trimming control signals to the numerical grinding machine and a laser through a microprocessor controller, so that the laser emits an appropriate laser pulse to burn a point to be trimmed on the grinding wheel according to the control signals, the laser displacement sensor detects present remained allowance of the point, and the allowance of the point in the computer is updated timely; and d, the step c is carried out repeatedly till the trimming precision as required is achieved.

Description

technical field [0001] The invention relates to a laser trimming method for a superhard abrasive grinding wheel. Background technique [0002] The grinding wheel needs to be trimmed at the beginning of use and after a period of use. The dressing of the grinding wheel is divided into two processes: shaping and sharpening. Shaping refers to the process of micro-cutting the working surface of the grinding wheel, so that the grinding wheel reaches the required geometric accuracy, and the tip of the abrasive grains is finely broken to form a sharp grinding edge. Sharpening refers to the process of removing part of the bond between the abrasive grains, making the abrasive grains protrude out of the bond, forming a cutting edge, and creating sufficient chip space. Due to the very high hardness of superabrasives, it is difficult to achieve high-precision and high-efficiency dressing based on the "head-to-head" method, and its shape accuracy is very high, so dressing is particularly...

AI Technical Summary

Problems solved by technology

The EDM dressing method has high dressing precision, but the dressing speed is slow and the efficiency is low; the dressing mechanism of the GC cup wheel is similar to that of the grinding oil stone method, mainly relying on the abrasive removal of the metal bond by the abrasive, which causes the grinding wheel dresser The loss is large, and more complex special dressing devices are required, and the combination with various grinding machines is poor, and it is difficult to realize online dressing of superabrasive grinding wheels; the electrolytic dressing method is fast but difficult to shape, and due to the negative Influenced by the electric field, flow field, and electrode reaction dynamic process between them, the machining gap is not equal everywhere, so that the surface to be trimmed is uneven, and the grinding roughness is not ideal; the electrolytic online sharpening method (ELID) is only suitable for metal bonds. Dressing of micropowder grinding wheel

The current superabrasive grinding wheel dressing methods generally have limitations such as high dressing costs, low efficiency, complicated devices, and difficult operations.

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