Radius highly synchronous and precise broaching processing method for double bearing bushes and automation device

Abstract

The invention discloses a radius highly synchronous and precise broaching processing method for double bearing bushes and an automation device on the basis of the method. The processing method comprises processes of automatic loading and feeding, clamping and positioning and broaching processing of the bearing bushes; before the clamping and positioning process, a floating preset positioning process of the double bearing bushes is added; and in the clamping and positioning process, a full floating structure clamping seat and two elastic-expansion three-point positioning pressure heads are adopted. According to the automation device, the technical difficult problem of simultaneously clamping and positioning the double bearing bushes is solved; the processing efficiency is improved; and the automation device has high precision degree and good safety performance.

Description

technical field [0001] The invention belongs to the technical field of high precision machining of bearing bush radius, in particular to a processing method and an automatic device for high synchronous precision broaching of double-piece bearing bush radius. Background technique [0002] In the processing technology of the bearing bush: first, the raw material of the metal sheet is unloaded according to the design requirements, and the blanking material is processed into a semicircular bearing bush blank with the help of a stamping die, and finally the lip, inner diameter and bearing height of the bearing bush are further processed by a special machine tool. Process and form finished products. With the help of the existing bearing pad height broaching machine, the processing steps of bearing pad height include: conveying and positioning the blank, locking the die to process the workpiece, and combining broaching to complete the fine machining of the bearing pad mouth hei...

AI Technical Summary

Problems solved by technology

However, this device can only process one piece of bearing bush at a time, and the processing range is small and the machining accuracy is low; there are many factors that affect the height accuracy of the bearing bush radius: the accuracy of clamping and positioning, the magnitude of the clamping force, and the way the clamping block is positioned , equipment rigidity, dirt on the surface of the bearing bush, etc.; and the accuracy of the radius height of the bearing bush directly affects the fit interference of the bearing bush and the technical performance of the crankshaft connecting rod system

In the existing technology, it is difficult to completely solve the above technical problems even with the broaching process of a single bearing pad, and it is even more difficult to solve the synchronous broaching process of a double bearing pad, especially when the two bearing pads are simultaneously clamped and positioned on the upper semicircular die It is difficult to ensure the accuracy in the middle, and the existing clamping and positioning method cannot ensure that the two bearing bushes are perfectly fitted on the upper semi-circular die, and the broaching accuracy cannot be guaranteed

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