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Centrifuge hot press sintering method and device of metal bonding agent extra hard material grinding wheel

A technology of metal bond and hot pressing sintering, which is applied in the direction of grinding equipment, metal processing equipment, grinding/polishing equipment, etc., can solve the problem of uneven axial density distribution, achieve simple equipment, reduce production costs, The effect of high control precision

Inactive Publication Date: 2007-02-14
ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of uneven axial density distribution caused by the traditional axial pressure forming process of the high-thickness metal bond superhard material grinding wheel, and the problem of pressing and forming the grinding wheel with complex profiles in the axial direction of the outer circle; Improve the sintering speed to reduce the thermal damage of superhard material abrasives, increase the alloying degree of the binder, enhance the holding force of the abrasive grains, improve the grinding performance of the grinding wheel, and provide a metal bond superhard material grinding wheel centrifugal pressure reaction sintering method and device (Including process, tooling, centrifugal sintering equipment, etc.)

Method used

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  • Centrifuge hot press sintering method and device of metal bonding agent extra hard material grinding wheel

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Experimental program
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Effect test

Embodiment 1

[0024] The present invention comprises the steps:

[0025] A. In the mold cavity composed of molds (4) and (5), put the grinding wheel working layer material (8), transition layer material (17), isolation layer (7) and centrifugal medium (6) from outside to inside in the radial direction Arranged in layers, the mold is fixed on the main shaft mechanism (11); the working layer material (8) of the grinding wheel includes abrasive material and metal bond;

[0026] B. Start the motor (12) to drive the mold, the centrifugal medium and the molding material composed of the grinding wheel working layer material and the transition layer material to rotate at high speed, and the centrifugal medium pressurizes the molding material through the isolation layer;

[0027] C. Start the heating device, heat up and pressurize the molding material, and turn off the heating power after the centrifugal hot pressing sintering is completed;

[0028] D. Cool down to below 300°C, stop the rotation, a...

Embodiment 2

[0032] Method of the present invention comprises the steps:

[0033] Design and manufacture Φ100mm×150mm (height dimension)×3mm (thickness of abrasive layer of grinding wheel) / 7mm (thickness of non-abrasive layer of grinding wheel, also called transition layer)

[0034] The weight percent of the binder is: Cu 50-80%, Co 10-15%, Fe 10-15%, Ni 5-10%,

[0035] Sn 10-20%, Zn 0-5%.

[0036] Diamond concentration: 100%, particle size 70 / 80.

[0037] Concrete preparation method is as follows:

[0038] A. Mixing

[0039] First weigh the various binder powders required by the above formula according to the formula share and put them into a two-dimensional or three-dimensional mixer commonly used in the superabrasive tool industry to fully mix (dry mix) evenly for 40 minutes. Then add the diamond and mix well (dry mixing) evenly for 30 minutes.

[0040] B. Granulation

[0041] Add the above mixture into the general granulation agent (WS120 temporary molding a...

Embodiment 3

[0053] Method of the present invention comprises the steps:

[0054] Design and manufacture Φ100mm×150mm (height dimension)×5mm (thickness of abrasive layer of grinding wheel) / 5mm (thickness of non-abrasive layer of grinding wheel, also called transition layer)

[0055] The weight percent of the binder is: Cu 50-80%, Co 10-15%, Fe 10-15%, Ni 5-10%,

[0056] Sn 15-20%, Zn 0-5%.

[0057] Diamond concentration: 75%, particle size 140 / 170.

[0058] Concrete preparation method is as follows:

[0059] A. Mixing

[0060] First weigh the various binder powders required by the above formula according to the formula share and put them into a two-dimensional or three-dimensional mixer commonly used in the superabrasive tool industry to fully mix (dry mix) evenly for 40 minutes. Then add diamond and mix well (dry mixing) evenly for 40 minutes.

[0061] B. Granulation

[0062] Add the above mixture into the general granulation agent (WS120 temporary molding agen...

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Abstract

The present invention is centrifugal sintering method and apparatus for making super hard material grinding wheel with metal adhesive. The centrifugal sintering method is that under heating condition, the mold is made to rotate at high speed so that the mixed material inside the mold is heat pressurized and sintered under the action of centrifugal force. The centrifugal sintering apparatus includes one heater and one centrifugal machine, the heater is an inducing heater or a resistive heater, and the centrifugal machine includes a support and a machine seat with protecting cover, main rotating shaft mechanism and mold inside the heating element of the heater. The present invention realizes centrifugally pressurized sintering, and has raised axial density homogeneity of the super hard material grinding wheel.

Description

technical field [0001] The invention relates to a method and a device for centrifugal hot-pressing sintering of a metal-bonded diamond grinding wheel, in particular. Background technique [0002] Among diamond tools, metal bonded grinding wheels have high grinding efficiency, strong surface retention ability and ideal service life, and are widely used in stone, ceramics, glass, refractory materials, hard alloys, magnetic materials, semiconductors, etc. Materials and other non-metallic materials and non-ferrous metal materials and other processing fields. [0003] Metal bond diamond grinding wheels are usually manufactured by powder metallurgy. The process mainly includes: mixing, axial forming, sintering, post-processing, etc. The structure and hardness of the grinding wheel, the uniformity of the distribution of diamond abrasive grains, and the damage degree of diamond abrasive grains during the sintering process directly affect the performance of the grinding wheel, which...

Claims

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Application Information

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IPC IPC(8): B24D18/00
Inventor 李季夏举学吕申峰
Owner ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
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