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Constant pressure ultrasonic wave aiding magnetorheological finishing method and constant pressure ultrasonic wave aiding magnetorheological finishing device

An ultrasonic and constant pressure technology, applied in the field of intelligent constant pressure high-efficiency precision polishing, can solve the problems of magnetorheological fluid instability, pressure changes in the processing area, magnetorheological fluid recovery, etc., and achieve uniform distribution of components and abrasives , to achieve uniform removal effect

Inactive Publication Date: 2014-11-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the instability of the magnetorheological fluid (viscosity, particle distribution, etc.) stability control
Moreover, the traditional magnetorheological polishing method cannot truly complete concave polishing and completely free-form surface polishing due to the problems of single grinding head and workpiece movement trajectory during processing and the recovery of magnetorheological fluid.

Method used

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  • Constant pressure ultrasonic wave aiding magnetorheological finishing method and constant pressure ultrasonic wave aiding magnetorheological finishing device

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Experimental program
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Effect test

Embodiment 1

[0029] The ultra-precise magnetorheological polishing of the aspherical core (concave) with a caliber of φ8.4mm is completed by the method of the invention. The specific implementation process is as follows:

[0030] (1) Install the workpiece 1 after ultra-precision grinding on the rotary table 16, and the workpiece material is tungsten carbide cemented carbide;

[0031] (2) Drive the X, Y, Z-axis driving device to drive the main shaft to feed along the X, Y, Z guide rails, adjust the distance between the micro ball grinding head and the workpiece, so that a 5mm gap is formed between the two, and install it on the micro ball grinding head through the control system Threshold P of the load cell where the core of the electromagnetic coil protrudes above 1 and P 2 , P 1 =5N,P 2 =7N;

[0032] (3) Start the spindle to drive the micro ball grinding head to rotate, the speed of the micro ball grinding head is 12000rpm, and start the ultrasonic vibration device at the same time, ...

Embodiment 2

[0036] The ultra-precise magneto-rheological polishing of the glass-ceramic aspherical lens (convex surface) with a caliber of φ10mm is completed by the method of the invention. The specific implementation process is as follows:

[0037] (1) The workpiece 1 after ultra-precision grinding is installed on the turntable 16, and the workpiece material is glass ceramics;

[0038] (2) Drive the X, Y, Z-axis driving device to drive the main shaft to feed along the X, Y, Z guide rails, adjust the distance between the micro ball grinding head and the workpiece, so that a gap of 3mm is formed between the two, and install it on the micro ball grinding head through the control system Threshold P of the load cell where the core of the electromagnetic coil protrudes above 1 and P 2 , P 1 =2N,P 2 =2.5N;

[0039] (3) Start the spindle to drive the micro ball grinding head to rotate, the speed of the micro ball grinding head is 15000rpm, and start the ultrasonic vibration device at the sa...

Embodiment 3

[0043] The ultra-precise magnetorheological polishing of the aspherical prism (convex surface) with a caliber of φ2.6mm is completed by the method of the invention. The specific implementation process is as follows:

[0044] (1) The workpiece 1 after ultra-precision grinding is installed on the turntable 16, and the workpiece material is quartz glass;

[0045] (2) Drive the X, Y, Z axis driving device to drive the main shaft to feed along the X, Y, Z guide rails, adjust the distance between the micro ball grinding head and the workpiece, so that a 2mm gap is formed between the two, and install it on the micro ball grinding head through the control system Threshold P of the load cell where the core of the electromagnetic coil protrudes above 1 and P 2 , P 1 =1N,P 2 =1.2N;

[0046] (3) Start the spindle to drive the micro ball grinding head to rotate, the speed of the micro ball grinding head is 20000rpm, and start the ultrasonic vibration device at the same time, drive the...

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Abstract

The invention discloses a constant pressure ultrasonic wave aiding magnetorheological finishing method and a constant pressure ultrasonic wave aiding magnetorheological finishing device. The method includes the steps of firstly, mounting a workpiece on a double-rotating workbench; secondly, adjusting distance between a small ball milling head and the workpiece to allow a clearance to be formed between the two, and setting a threshold P1 and a threshold P2 of a force cell at an extending position of an electromagnetic coil iron core mounted above the small ball milling head through a control system; thirdly, starting a spindle to drive the small ball milling head to rotate, simultaneously starting an ultrasonic wave vibrating device to allow ultrasonic vibration of the small ball milling head, and jetting magnetorheological fluid in the clearance formed by the small ball milling head and the workpiece through an output pipeline; and fourthly, repeatedly finishing the workpiece according to the surface shape of the to-be-machined workpiece until the machining of the workpiece is completed. Accurate point removing can be performed on the workpiece surface by the method.

Description

technical field [0001] The invention relates to the technical field of high-efficiency precision machining of complex profiles of hard and brittle materials, in particular to an intelligent constant-pressure high-efficiency precision polishing method for complex profiles realized in stages by controlling the flow rate of magnetorheological fluid and the strength of an electromagnetic field. Background technique [0002] Today, with the rapid development of optics and related science and technology, with the application of hard and brittle materials with complex profiles represented by free-form surfaces, aspheric surfaces and other optical components are becoming more and more widely used, the ultra-precision machining of complex profiles of hard and brittle materials Technology also puts forward higher and higher requirements. In addition to being required to have high surface accuracy and excellent surface roughness, the manufactured optical components also need as few sub-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B1/04
Inventor 仇中军高山邹大程房丰洲
Owner TIANJIN UNIV
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