Preparation technology of cubic boron nitride accumulation abrasive material

A technology of cubic boron nitride and accumulated abrasives, applied in abrasives, manufacturing tools, grinding/polishing equipment, etc., can solve the problems of large usage of liquid-based adhesives, small contact surface between abrasive particles and particles, complicated equipment, etc. , to achieve the effect of improving wettability, improving bonding strength and reducing thermal stress

Active Publication Date: 2017-03-29
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, it is impossible to prepare CBN stacked abrasives by using silica sol and aluminum sol as binders.
At the same time, the existing methods for preparing the accumulated abrasives are to mix the abrasives in a large amount of liquid-based adhesives to obtain a slurry, and to prepare the accumulated abrasives by spray drying and then calcining. This process uses a large amount of liquid-based adhesives. The equipment is complex, because there is no pressure, the contact surface between the abrasive particles is small, and the bonding strength of the accumulated abrasive after sintering is low

Method used

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  • Preparation technology of cubic boron nitride accumulation abrasive material
  • Preparation technology of cubic boron nitride accumulation abrasive material
  • Preparation technology of cubic boron nitride accumulation abrasive material

Examples

Experimental program
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Embodiment Construction

[0035]A kind of preparation technology of CBN accumulation abrasive, concrete steps are:

[0036] Weigh industrial-grade titanium dioxide sol (solid phase content 10wt%), commercially available industrial-grade water glass solution (modulus 2.8) and boric acid (chemically pure) at a mass ratio of 25:70:5, and weigh the water glass Add titanium dioxide sol to the solution, stir for 1 hour at a speed of 2000 rpm, then add weighed boric acid, stir for 1 hour at a speed of 2000 rpm, and then pour the mixed liquid into a closed container to wait Used to obtain the binder of CBN stacked abrasives.

[0037] (2) Weigh the CBN abrasive (grain size W5), the adhesive obtained in step (1) and yellow dextrin powder according to the mass ratio of 77:20:3, and pour the weighed various raw materials into the corundum ball mill altar, The diameter of the ball milling altar is 400mm, and plastic balls are added according to the ratio of ball to material mass ratio of 0.8:1, among which plastic...

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Abstract

The invention discloses a preparation technology of cubic boron nitride accumulation abrasive material. The preparation technology comprises the following steps: preparing an adhesive from titanium dioxide sol, water glass solution and boric acid; compounding the adhesive with yellow dextrin powder and cubic boron nitride abrasive material, carrying out ball-milling and sieving, and drying the sieved material to obtain dry pressing material of the cubic boron nitride accumulation abrasive material; carrying out compression moulding, drying, sintering and cooling on the dry pressing material of the cubic boron nitride accumulation abrasive material to obtain block of the cubic boron nitride accumulation abrasive material, and levigating the block to obtain the cubic boron nitride accumulation abrasive material. Compared with cubic boron nitride single crystal abrasive material, the cubic boron nitride accumulation abrasive material has more excellent grinding property.

Description

technical field [0001] The invention relates to a preparation process of cubic boron nitride piled abrasives. Background technique [0002] Cubic boron nitride (CBN) is recognized as the best abrasive for precision grinding of ferrous metals due to its high hardness, high thermal conductivity, and good chemical stability. At present, the powdered CBN abrasive is often mixed with resin, ceramic or metal bond, then pressed into shape, and then solidified or sintered to prepare a CBN grinding wheel with a certain shape or strength, which is used in ferrous metal grinding. The CBN abrasives currently used to prepare CBN grinding wheels are all single crystal abrasives. Each CBN abrasive is a single crystal. When it is prepared into a grinding wheel for grinding, each abrasive only forms a grinding edge. As the grinding progresses , the grinding edge on the CBN abrasive is gradually passivated, and is broken under the action of grinding force and thermal stress to form a new gri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/04B24D18/00B02C17/10
CPCB02C17/10B24D3/04B24D18/0009
Inventor 刘小磐
Owner HUNAN UNIV
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