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Self-dressing ultra-hard micro grinding tool pellet containing soluble resin material and preparation method thereof

A kind of abrasive pellets, soluble technology, applied in the direction of metal processing equipment, grinding/polishing equipment, abrasives, etc., can solve the problems of high cost, complicated operation, etc., to promote dressing, promote dissolution, simple production method and use method Effect

Active Publication Date: 2017-07-14
衢州极目光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has high precision, the cost is too high and the operation is complicated

Method used

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  • Self-dressing ultra-hard micro grinding tool pellet containing soluble resin material and preparation method thereof
  • Self-dressing ultra-hard micro grinding tool pellet containing soluble resin material and preparation method thereof
  • Self-dressing ultra-hard micro grinding tool pellet containing soluble resin material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The implementation plan is as follows:

[0039] Step 1, first take diamond and silicon carbide abrasives with an average particle size of 2.5 microns, add fillers (copper-coated graphite, calcium oxide, cerium oxide, zinc oxide, cryolite powder, talcum powder, copper powder), wetting agent phenolic resin liquid, Mix for 30min to obtain mixed powder;

[0040] Step 2, put "insoluble" resin binder (phenolic resin), "soluble" resin binder (acrylic resin No. 4 - methacrylate and dimethylaminoethyl ester copolymer) into the V-type tank mix Mix evenly in the machine to obtain a mixed resin, in which the solubility of acrylic resin No. Ⅳ decreases with the increase of pH, generally dissolves at pH 1.2-5.0, and swells at pH 5-8;

[0041] Step 3, put the mixed powder and the mixed resin into the V-type tank mixer for mixing, and add the curing agent hexamethylenetetramine to obtain the pre-pressed powder;

[0042] Step 4, sieve the pre-compressed powder obtained in step 3, the ...

Embodiment 2

[0047] Embodiment 1 is obtained abrasive tool pellet and is processed on plane polishing machine, as figure 2 As shown, water-based abrasive fluid is continuously injected into the surface layer of the abrasive tool during the processing process to dissolve the acrylic resin No. Strong structural strength, so that the passivated diamond abrasive grains are easily separated from the surface of the abrasive tool under the action of the grinding force, and play the role of dressing the abrasive tool to expose new abrasive grains.

[0048] Acetic acid is used as a pH regulator. When the passivation of the abrasive tool is serious and the grinding efficiency decreases, the amount of acetic acid is increased in the grinding liquid, and the pH value is adjusted to 4-6, which will strengthen the "soluble" resin binder (acrylic resin No. Ⅳ ), the abrasive wears quickly, and the sharp abrasive grains on the sub-surface are exposed, and the abrasive pellets become sharp again, and onlin...

Embodiment 3

[0051] The grinding tool pellets obtained in embodiment 1 are ground in grinding liquids of different pH values, acetic acid is used as the acid pH regulator, sodium carbonate is used as the alkali pH regulator, and other grinding parameters are consistent, and the wear rate of the observed grinding tool is as follows: Figure 4 shown. It can be seen from the figure that as the PH value increases, from acidic to alkaline, the wear rate of the abrasive tool is also reduced. Therefore, considering the life of the abrasive tool, it is necessary to passivate the abrasive tool Degree, adjust the PH value, while sharpening the abrasive, control the wear of the abrasive. The "soluble" resin in the abrasive pellets obtained in Example 1 is an acid-soluble resin. When the material removal rate is high, the pH value of the grinding liquid can be controlled above 7 to slow down the wear of the abrasive. When the material removal rate drops, an acid PH regulator can be added to keep the ...

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Abstract

The invention discloses a self-dressing ultra-hard micro grinding tool pellet containing a soluble resin material and a preparation method thereof. The self-dressing ultra-hard micro grinding tool is composed of, by weight, 30-70% of an abradant, 0.5-5% of a wetting agent, 5-25% of a soluble resin, 15-30% of a dissoluble resin, 0-3% of a curing agent, and 20-50% of a filling agent. The dissoluble resin plays the role of a main binder, the soluble resin plays the role of an auxiliary binder, and the solution rate of the soluble resin is related to the PH value of a grinding fluid. The PH value of the grinding fluid can be adjusted according to the passivation degree of the grinding tool, therefore the rate of the grinding fluid saluting the soluble resin on the surface layer of the grinding tool can be adjusted, and the dressing rate can be controlled accordingly. In the process of dressing, the grinding fluid solutes the soluble resin material on the surface layer of the grinding tool to form voids among a binding agent, thereby reducing the strength of the binder and holding force on abrasive particles around, and thus the abrasive particles passivate the surface layer of the grinding tool fall off, new abrasive particles come out, and accordingly the purpose of automatically controlling dressing of the grinding tool online can be achieved.

Description

technical field [0001] The invention relates to the technical field of abrasive tools for precision or ultra-precision grinding, in particular to a self-sharpening and controllable abrasive tablet with the addition of soluble resin and a preparation method thereof. Background technique [0002] In terms of precision, ultra-precision and high-speed, ultra-high-speed grinding technology, it has been greatly developed and applied in industrially developed countries in the past 20 years. At present, grinding with superabrasive abrasives is an efficient processing method for hard, brittle and difficult-to-machine materials with high precision. However, in the production and application of superhard abrasive pellets for so many years, some of its own defects have also been exposed, mainly in: some binders have low holding power on abrasive grains, and are easy to fall off, poor in durability, difficult to trim, and abrasive grains On the other hand, due to the tightness of the bo...

Claims

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Application Information

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IPC IPC(8): B24D3/34B24D3/28B24D18/00
CPCB24D3/28B24D3/34B24D3/344B24D18/0009
Inventor 冯凯萍应俊宏周兆忠倪成员郁炜尹涛许庆华
Owner 衢州极目光电科技有限公司
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