Testing method of continuous scratching interference behavior of single abrasive grain of black metal test piece pre-repaired by CBN tool
A ferrous metal, single abrasive technology, applied in metal processing equipment, workpiece feed movement control, grinding machines, etc., can solve the problem of not realizing automatic adjustment and position feedback control, difficult to achieve high-precision interference behavior testing, no Considering the interference of multiple abrasive particles, etc., to achieve high-speed and high-precision scratch testing, avoid large end face runout or radial runout, and improve shape accuracy and surface finish.
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Embodiment 1
[0041] A method for testing the continuous scratching interference behavior of a single abrasive grain of a CBN (cubic boron nitride) tool pre-repaired ferrous metal specimen, the device used includes:
[0042] 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;
[0043] A dynamic balancer, used for online dynamic balancing of the test piece 1;
[0044] 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 ;
[0045] The tool head 2 is used for scratch testing; the top of the tool head 2 is fixed with a single abrasive particle; the tool head 2 can be replaced with the CBN single-point tool and attached to the bracket, and can be moved through the br...
Embodiment 2
[0068] 1) Fix the 45 steel disc-shaped test piece 1 with a diameter of 140 mm and a thickness of 20 mm on the electric spindle of the machine tool with a magnetic chuck or mechanical fixture, and the test piece 1 can be rotated by the electric spindle; use a dynamic balancer to balance the test piece 1 Perform online dynamic balancing to reduce the vibration of the test piece 1 during high-speed rotation, so as to ensure that the abrasive grains and the test piece 1 can be in stable contact during the scratching process;
[0069] 2) Use the CBN single-point turning tool 5 to repair the disk of the test piece 1, first perform rough machining, and then perform finishing machining, so as to form a circle with an end face runout of 5.1 μm and an average surface roughness of Ra4.57nm on the surface of the test piece 1. Annular disc repair area 3 to reduce the runout of the end surface of the test piece 1, improve the surface quality, and further ensure that the abrasive grains and t...
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