The document discusses how to grind polycrystalline diamond (PCD) cutting tools. It describes the history and development of PCD and its applications. It then explains the grinding process for PCD tools, including using vitrified bond diamond grinding wheels, coolants, and machine settings like speed and feed rates. It provides details on grinding methods for PCD tools used in automotive and electronics industries. Finally, it shares technical parameters and contact information for PCD tool grinding.

1. How to grinding PCD tool?
Industrial developed countries on PCD tool research earlier, its application has been more
mature. Since the synthetic diamond was first synthesized in Sweden in 1953, a great deal of
achievements has been made in the research on the cutting performance of PCD tools. At
present, the world's leading manufacturers of synthetic diamond composites mainly include
DeBeers of the United Kingdom, GE of the United States and sumitomo electric of Japan. In
the 1970s, polycrystalline diamond (PCD) was synthesized by high pressure synthesis
technology, which solved the problem of rare and expensive natural diamond and extended
the application scope of diamond tools to aviation, aerospace, automobile, electronics, stone
and other fields. With the rapid development of manufacturing in China in the past decade,
the demand for ultra-hard cutting tools in automobile industry and 3C industry has increased
rapidly. Domestic production and quality of PCD tools have achieved a takeoff, leading the
world PCD tool market.
The high hardness of PCD makes its material removal rate very low (even the removal rate of
hard alloy is only 1/10000). At present, PCD tool grinding process mainly USES vitrified bond
diamond grinding wheel for grinding. Because of the interaction between grinding materials
with similar hardness and PCD, the grinding law is relatively complex. For grinding wheels
with high particle size and low rotating speed, using water-soluble coolant can improve PCD
grinding efficiency and grinding accuracy. The choice of grinding wheel binder depends on
the type of grinding machine and processing conditions.
PCD cutting tools according to the material of PCD compact and welding allowance, grinding
mode is also different, according to different processing industry, the direction of PCD cutting
tool is divided into car PCD cutting tools and 3c direction of PCD cutting tool, the two
direction of PCD cutting tool grinding mode is also different, mainly in the direction shown
by the processing industry under the way of grinding.

2. The higher the speed of the grinding wheel, the harder the grinding wheel, the lower the
sharpness, the better the quality of the grinding edge. But cannot be considered the pursuit
of speed.
For our vitrified diamond grinding wheel produced, the end pulsation is less than 0.02mm,
and the larger the end pulsation is, the MORE it will impact the blade, making it easy for the
PCD blade to crack. MORE vitrified diamond grinding wheel, the dynamic balance is
controlled within 0.03, the vibration force on the grinding machine is almost zero. MORE
vitrified diamond grinding wheel, with good self-sharpening, high sharpness, low efficiency
of grinding wheel and grooves on the surface, generally recommended for 180#, 240# and
600#, our business will match suitable grinding processing scheme and correction scheme for
you.
PCD
Tools
Grinding
way Grit
Feed(millimeter) Speed(r/min)
Auto
industry
PCD tool
Three
steps
Rough grinding 230/270-
W40
5 1400-2000
Semi grinding W14-W7 2
Fine grinding W5 0.5
Two
steps
Rough grinding W28-W14 2-3
Fine grinding W7-W5 0.5-1
One
steps
Most for peripheral
grinding,cylindrical
grinding
W14-W10 1-1.5
3C industry
PCD tool
Two
steps
Rough grinding W20-w14 2 1500
Fine grinding W3.5 0.1-0.5

3. Type D(mm) T(mm) H(mm) X(mm) W(mm)
6A2
75 10 15 20 25 10 20 3 4 5 5 10
100 15 20 15 30 10 20
31.75
3 5 10 5 6 8 10
125 15 20 15 30 35 20 31.75
32
5 10 5 10 15 20
150 15 20 15 30 35 20 31.75
32
5 8 10 5 6 10 15 20
200 20 25 30 35 40 45 50 31.75 32
50 75
8 10 5 6 10 15 20 25
As far as possible, the vitrified diamond grinding wheel can avoid contact with the tool rod
and tool body alloy. It is fine for the coarse grinding wheel, especially the fine grinding wheel,
which will affect the grinding efficiency of the grinding wheel.
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