/ /
/

Zhengzhou Diamond Superhard Tools Co. Ltd.
Tel: +86-371-67770067
Fax: +86-371-67770119
Email: postmaster@dam-superhard.com
Url: http://en.dam-superhard.com
Address:Dingzhuang industrial park, Xushui,Zhengzhou, Henan, P.R.China
QQOnline 

Four Main Electment of Abrasive Material

1Abrasive Material
Abrasive material is the mainest in abrasive tools, because it directly grinds workpiece. There are two kinds of abrasive: Diamond & Cubic Boron Nitride (CBN).
1. Diamond is the hardest material and can be divided into different types according to the shapes and intension, and suitable for processing various hard and brickle material.
2. CBN is another kind of superhard abrasive, its hardness is only lower than diamond while its thermal stability and chemical inertia are better, and suitable for grinding and processing ferrous metal.
Abrasive
Type
Mesh Range
Main Application
Diamond
RVD RVDNi
35/40-325/400
60/70-270/325
Make into resin & vitrified bond abrasive tools, be used for grinding hard alloy & non-metal.
MBD4
MBD6 MBD8
45/50-325/400
45/50-325/400
45/50-120/140
Make into metal, vitrified & electroplated bond abrasive tools, be used for grinding glass, ceramics, gem, stone and ferrite etc.
M-SD
36/54-0/0.5
Make into abrasive paste, abrasive blade, polishing wheel and whets tone and so on, used for lapping and polishing various materials
CBN
CBN
M-CBN
60/70-325/400
36/54-0/0.5
Make into resin, metal, electroplated abrasive tools, used for grinding alloy steel and hard metal materials
only as reference for customers.
2Grain Size
Grain size is the distinguish for the thickness of abrasive, according to the size of material, we divid the grain size into 33 types:
35/40;40/45;45/50;50/60;60/70;70/80;80/100;100/120;120/140;140/170; 170/200;200/230;230/270;270/325;325/400;36-54;22-36;20-30;12-22;10-20;8-12;6-12;5-10;4-8;3-6;2.5-5;2-4;1.5-3;0-2;0.5-1.5;0.5-1;0-0.5;0-1;0-0.5.
  The choice of grain size will directly affect the grinding efficiency and thickness degree of workpiece, general speaking, if grain size is thin, the workpiece will be less rough , and if grain size is thick, the workpiece can grind more, therefore choosing thick grain size tools is proper once roughness is enough.

General Choice of Grain Size

Grinding Method
Mesh Range
Coarse Grinding
40/45-120/140
Semi-finished Grinding
120/140-200/230
Finished Grinding
200/230-325/400
Lapping, polishing
36/54-0/0.5
 
Relationship Between Grain Size and Roughness
 
Mesh Range
Resin Bond Tools
Metal Bond Tools
70/80-100/120
.
1.6-0.4
100/120 140/170
0.4-0.2
0.8-0.2
140/170 230/270
0.20-0.10
0.4-0.2
270/325-20/30
0.10-0.04
.
12/22-3/6
0.05-0.025
.
3/6-2/4
0.025-0.012
 
3Bond
Bond can make abrasive tools grind workpiece efficiently by its function of stickness and holding. For general bond, there are four main categories: resin bond, vitrified bond, metal and electroplated bond.
Bond
Code
Main Feature and Usage
Metal
M
Sintered with powder of copper, stanum, silver, cobalt and mill etc, having strong combination, well wear resistance and long life with bearing larger burthen.
Vitrified
V
Made from vitrified material, having well wear resistance, self-sharpness and suiting high precision grinding and high efficient grinding of common material and special material.
Resin
B
Usually use phenolic resin, polyamide resin, having well self-sharpness, heatless, high grinding efficiency and wide application range.
Electroplated
Me
Abrasive is covered on substrate by electroplating to make various complex tools. such as amending tools, grinding plates etc, and having strong grinding ability and high precision.
 
 4Concentration 
The concentration is the scale of abrasive in whole grinding layer. The choose of concentration should depend on the shape, grain size &
bond of tools, also the workpiece and grinding method, such as:
1. For resin bond, the concentration is 50%-100%, vitrified and metal is 75%-150%. electroplated is 200%.
2. Coarse grinding use high concentration, and semi-finished grinding & finished grinding use medium one, lapping & polishing use low one.
3. The abrasive tools with narrow grinding surface use high concentration, and same to channel grinding.
4. Long life abrasive tools require high concentration.

Copyright 2010 Zhengzhou Diamond Superhard Tools Co. Ltd. All Rights Reserved Website: http://en.dam-superhard.com
TEL: +86-371-67770067 FAX: +86-371-67770119 E-mail: postmaster@dam-superhard.com Add:Dingzhuang industrial park, Xushui,Zhengzhou, Henan, P.R.China  全网营销技术支持:郑州征途信息(让您的营销收益翻倍!)