A method for intensified grinding of gear-tooth-shaped workpieces

Abstract

The invention relates to a reinforced grinding machining method of wheel-tooth-shaped workpieces, and belongs to the technical field of wheel-tooth-shaped workpiece grinding machining. The reinforcedgrinding machining method comprises following steps that a first V block is adjusted, the included angle between the center line of the first V block and the horizontal plane is A, a second V block isadjusted, and the rotating center of the wheel-tooth-shaped workpieces and the magnetic pole center of an electromagnetic centreless fixture have the set eccentric amount e; the value range of the included angle B of the center lines of the two V blocks is larger than 90 degrees and smaller than 165 degrees; the spraying direction of a nozzle is adjusted, the included angle C between the sprayingdirection of the nozzle and the horizontal plane is larger than 45 degrees and smaller than 165 degrees, and the distance d between a spraying opening of the nozzle and the circle center of the wheel-tooth-shaped workpieces is larger than R+20mm and smaller than R+30mm; the electromagnetic centreless fixture is started, after the wheel-tooth-shaped workpieces are rotated by the set time, the nozzle faces the wheel-tooth-shaped workpieces; after the nozzle carries out spraying for 2 to 3 min, the nozzle is closed, after spraying is stopped, the electromagnetic centreless fixture is turned off,and the wheel-tooth-shaped workpieces are taken down. The work surfaces of the wheel-tooth-shaped workpieces are subjected to surface reinforcing, and surface reinforcing is more uniform.

Description

technical field [0001] The invention relates to the technical field of grinding and processing gear-tooth-shaped workpieces, in particular to an intensified grinding-processing method for gear-tooth-shaped workpieces. Background technique [0002] Gear-tooth-shaped workpieces are widely used in the mechanical field and are key parts in mechanical transmission. Their machining accuracy and surface quality directly affect the accuracy of the transmission and the life of the machine. In order to improve its surface quality, metal surface strengthening technology is often used to strengthen the working surface of the tooth-shaped workpiece. [0003] A method for intensified grinding of the surface of a wear-resistant alloy steel workpiece (see the patent application whose patent publication number is CN103878703B), the method is to use abrasive materials (composed of reinforced steel shots, grinding powder, and grinding liquid) to randomly grind them under the action of high-pre...

AI Technical Summary

Problems solved by technology

But in the follow-up research, there are following disadvantages when using this method to strengthen the surface of the gear-tooth workpiece: (1) In the process of intensive grinding of the gear-tooth workpiece, the working surface of the gear-tooth workpiece and the The relative positions of the nozzles are always changing, and the tooth shapes of workpieces with different tooth shapes are different, so it is difficult to achieve uniform strengthening

(2) The centering fixture is used to clamp the toothed workpiece. Due to unavoidable reasons such as insufficient spindle rigidity and transmission error, the center position of the toothed workpiece has been in a fluctuating state, which affects the machining accuracy; and the clamping of the workpiece is closely related to the The disassembly is cumbersome and the production efficiency is low

(3) The existing electromagnetic centerless fixture cannot directly clamp the wheel-toothed workpiece, which will cause the beating of the rotation center of the workpiece, and the sprayed mixture is easy to fall into the support table and affect the processing

(4) The angle between the spraying direction and the horizontal direction is too large or too small, which is not conducive to the clamping stability of the workpiece. (5) When the diameter of the sprayed steel ball is too large, it is easy to damage the design arc of the working surface of the toothed workpiece.

(6) During the processing, the surface of the workpiece is prone to oxidation

Images