What are Diamond Tools How CVD Coatings Are Better?
Do you know what diamond tools are? What are they used
for and do they have any advantages over other ordinary tools. Given here is a
complete insight about these tools and the CVD tools as well as their coatings.
Here is a quick look.
What
are Diamond Tools?
Do not get confused by
their names. Diamond tools are not made up of diamonds entirely. These tools
are the cutting tools with the diamond grains which are fixed on the functional
parts of these tools. Diamond is super hard and hence these tools have many
benefits as compared to the other tools which are made up of common abrasives
like silicon carbide and corundum.
What
are Diamond Tools Used For?
Everybody knows that
diamond is the hardest known material and it is used in a variety of
applications like drilling, cutting and machining. They have many advantages
over carbides, which are used in high-speed applications. There are certain
disadvantages of these tools. They are far more expensive than carbide tools
and they wear out easily.
DLC or Diamond-like
carbon is an amorphous substance which displays certain standard properties of
carbon. This type of carbon is not suitable for jewelries and hence it is used
as a diamond coating to cover the
tools.
Polycrystalline diamond
tools consist of carbide base that is covered with layers of sintered diamond
powder. These tools have superior cutting edge and the use of diamond layer as
a coating leads to the better performance of these tools. They provide a more
economical solution and have a long life.
These tools are used
for diversified purposes like lenses, mirrors and the glass drilling
applications. There are several other usages of diamond wheels. They are used
in the sharpening of other cutting tools and for the dressing of grinding
wheels. Other uses for tools include cutting, polishing of metals and
micromachining processes. CVD inserts
(Inserts coated with CVD) run at a better cutting speed. However, in most of
the industries CVD insert with chipbreaker
is used for better performance.
What
are CVD Tools? A Brief View:
CVD or Chemical Vapor
Deposition tools are the wear-resistant tools that have wear-resistant CVD
coating which is used in a number of manufacturing applications, in some
plastic processing tools and wear components. However, the coating is most
widely used in the metal-forming tools.
Primarily, CVD coating
is used in manufacturing applications. In the high-stress application of metal
forming process where both the tolerance of tool and its substrate permit high
temperature, only CVD coating is preferred more than thin-dense chrome or TDC
or cold processes like PVD etc. The metallurgical bonding which results from
the coating process produces typical adhesion characteristics which are not
possible by cold processes. Given here is the typical metal forming applications
that needs Chemical Vapor deposition coating only.
➢
Swaging Dies
➢
Rim Dies
➢
Punches
➢
Draw Dies
➢
Stamping tools
➢
Extrusion Dies
➢
Coining Dies
➢
Trim Dies
➢
Form rolls
➢
Crimping tools
➢
Tube bending dies
➢
Wire draw dies
➢
Seaming rolls
CVDcoating protects the tools from wearing out. The enhanced
adhesion of this coating protects the tools from sliding friction and hence it
is in great demand. CVD End mill has
no binders and hence it is capable of cutting extremely sharp edges having
excellent surfaces. So, you can expect to have better finishing.
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