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Abrasive scratching and quick stop test method for cbn tool pre-repaired ferrous metal specimens

A technology of ferrous metals and testing methods, applied in the direction of measuring devices, instruments, and mechanical devices, etc., can solve problems that have not been reported, and achieve the effects of ensuring accuracy, improving quality, and ensuring relative motion accuracy

Active Publication Date: 2019-01-29
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can deeply study the mechanism of material removal in the cutting or grinding process. A variety of quick stop devices have been developed in the field of metal cutting, and the corresponding test results have also been reported in related papers. However, in the field of grinding , the quick-stop test method for single abrasive grain scratching has not been reported yet

Method used

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  • Abrasive scratching and quick stop test method for cbn tool pre-repaired ferrous metal specimens
  • Abrasive scratching and quick stop test method for cbn tool pre-repaired ferrous metal specimens
  • Abrasive scratching and quick stop test method for cbn tool pre-repaired ferrous metal specimens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A CBN (cubic boron nitride) cutting tool pre-repaired ferrous metal test piece of single abrasive continuous scratch test method, the device used includes:

[0041] Machine tool, the disc-shaped ferrous metal test piece 1 is mounted on the electric spindle of the machine tool, and the test piece 1 can be rotated by the electric spindle;

[0042] A dynamic balancer, used for online dynamic balancing of the test piece 1;

[0043] The CBN single-point tool is a CBN single-point turning tool 5, which is used to repair the end surface of the test piece 1; the CBN single-point turning tool 5 is detachably attached to the bracket, and is movably attached to the machine tool through the bracket ;

[0044]The tool head 2 is used for scratch testing; the top of the tool head 2 is fixed with a single grain of abrasive; the tool head 2 can be replaced with a CBN single-point tool and attached to the bracket in a detachable manner, and can be moved through the bracket The ground i...

Embodiment 2

[0062] The difference between this embodiment and Embodiment 1 is that a single spherical abrasive particle with a radius of 0.08 mm is brazed on the top of the tool head, and the rest are the same as Embodiment 1.

[0063] According to needs, the abrasive grains can be diamond, CBN, oxide ceramics or nitride ceramics; the shape of the abrasive grains can also be conical or polygonal; the abrasive grains are fixed on the tool by mechanical clamping, electroplating or brazing The tip of the head; the tool head can be in the form of an indenter or other consolidated abrasive grains.

[0064] According to the needs, adjust the parameters of the disk repair within the following range and perform one or more disk repairs to form a repair area on the surface of the test piece where the end face runout is better than IT1 grade and the average surface roughness Ra is better than 10nm:

[0065] 2-1) Rough machining of CBN single-point tool disk repair: vertical turning mode, cooling of...

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Abstract

The invention discloses a single-abrasive-particle scratching quick stop testing method for a CBN cutter pre-repaired ferrous metal test piece, belonging to the fields of material performance test in machining and precision and ultraprecision machining. According to the single-abrasive-particle scratching quick stop testing method, the ferrous metal test piece is fixed and is subjected to online dynamic balance; the CBN cutter is utilized for repairing the ferrous metal test piece, so as to meet end surface jumping and roughness requirements required by the test; the test piece rotates at an assigned speed, a tool head with the top end fixedly connected with single abrasive particles is radially fed at an assigned cutting depth to form spiral scratches in the end surface of the test piece, and the tool head and the test piece are instantly separated in the scratching process to realize the 'freezing' of a contact state between the abrasive particle and the test piece in the scratching process of the single abrasive particle; by virtue of three-dimensional topographical measurement and microscopic observation, related mechanisms of material deformation, formation of the machined surface, boundary friction and the like in the process for removing materials by virtue of the abrasive particle can be well known, thereby providing measures to the deep research on material removal mechanisms in the abrasive particle machining process, such as grinding.

Description

technical field [0001] The invention belongs to the field of material performance testing and precision and ultra-precision machining in mechanical processing, and in particular relates to an abrasive grain scratching quick-stop test method for a CBN tool pre-repaired ferrous metal test piece. Background technique [0002] The quick stop test method is also called the rapid drop test method, which refers to the use of external force to make the tool or abrasive particles leave the cutting or grinding area quickly, so as to "freeze" the contact state of the tool or abrasive particles with the test piece at the moment of withdrawal, and keep the test piece The state of the material at the moment of deformation is recorded and will not be destroyed by subsequent processing. This moment of deformation can be further analyzed through subsequent metallographic sample preparation and microscopic observation. This method can deeply study the mechanism of material removal in the cut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/06
CPCG01N19/06
Inventor 姜峰张涛言兰徐西鹏
Owner HUAQIAO UNIVERSITY
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