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We are adding a grooving and cut-off tool for small lathes with a
minimum grooving width of 1.25 mm and a low-cutting force "GF Type" chipbreaker
to our lineup. We are also adding new grades: "AC520U" for machining exotic
alloys and cast iron, and high grade "AC425K" for machining of castiron. Each
will go on sale in October this year.
Grooving is widely used for various machine parts such car
components. Problems afflicting this process include chip separation that is
more difficult than in normal turning, a tendency for chip blockages and
machined surface defects to occur, and a tendency for high loads on the cutting
edge and vibration of the tool due to the entire width of the cutting edge being
in contact with the work material during machining.
The "SEC Grooving Tool GND Type," with its excellent chip
management performance and high rigidity, has resolved these issues and
contributed to improvements of efficiency and cost reductions in grooving.
We have now made use of these characteristics to expand our
product lineup and enable compatibility with a wider range of processes. The
following items will be expanded and released.
1．Characteristics
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(1)Smallest edge width in the world: 1.25-mm grooving and cutting tool
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For cut-off of bars and the like by Swiss lathe, the grooving width of
inserts for processing is chipped as-is and separated during cut-off of work
materials. Use of inserts with a small grooving width reduces the amount of
chips and contributes to reducing material costs. In addition, if there are no
restrictions on groove width or tool path*1, it is
possible to suppress vibration during machining by using an insert with a
smaller grooving width to reduce cutting resistance.
In response to this
issue, we have developed an insert with the world's smallest grooving width,
1.25 mm.* For the holder, we have added holders of
10 x 10 mm shank size and 12 x 12 mm shank size, contributing to a reduction in
material costs for bar cut-off and an improvement in chip management during
small width grooving. In addition, a tool with a cutting edge of 1.5 mm width
will go on sale in March 2015.
* (As of July
2014 (checked by Sumitomo Electric). For two-corner-type unground products)
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(2)Low-cutting force chipbreaker*2 GF Type
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Chattering is prone to occur during grooving and cut-off with machine tools
of low rigidity or during grooving and cut-off of stainless steel.*3 To deal with such processes, we have developed a new
"GF Type" breaker equipped for both suppression of vibration and chip control
during machining.
For the "GF Type" breaker, the insert cutting edge is set
to a rake angle of 30°.*4 We have adopted a sharp
cutting edge configuration and a breaker configuration that prevents chip
friction by point contact.
This allows a roughly 30% reduction in vibration
during turning compared with our existing products and ensures stability while
turning.
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(3)"AC520U" for machining exotic alloys and cast iron, and high grade
"AC425K" for machining of cast iron
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We will expand our lineup by adding the PVD-coated "AC520U" for machining
exotic alloys and cast iron,*5 and the CVD-coated
high grade "AC425K" for machining of cast iron,*6 which has been newly developed for grooving, to our existing products, the
PVD-coated "AC530U" and the CVD-coated "AC830P".
2．Selection
Holders
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1.25-mm width for external turning
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4 items
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Inserts
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GF type breaker (1.25–6-mm width)
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14 items
(including AC520U below)
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Grades
AC520U (GG, GL, MG, ML, RG, CG,
GF type breakers)
AC425K (MG, ML, RG type breakers)
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46 items
18 items
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3．Sales plan
First year: ¥100 million
After 3 years: ¥300 million/year
4．Pricing
Holder GNDLR1212JX-1.2512
(12 x 12 mm
shank for 1.25-mm width)
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¥14,000
(¥15,120 including tax)
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Insert GCMN3002-GF (3-mm width)
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¥1,690
(¥1,825 including tax)
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*1 Tool path：
The user-defined route of the
cutting tool to cut parts.
*2 Breaker：
Protrusions and grooves
positioned near the cutting edge of a tool to control the chips that form during
machining.
*3 Chattering：
Vibration in tools and cutting
materials that occurs during machining. Chattering results in deterioration in
the appearance of machined surfaces and shortens tool life.
*4 Rake angle：
The angle of the cutting edge
that affects such things as cutting resistance and chip separation.
*5 PVD (Physical Vapor Deposition)：
An method
for forming a thin layer on the surface of a substance. Involves the deposition
of a thin layer of the target substance in the vapor phase on the surface of the
substance by means of a physical technique.
*6 CVD (Chemical Vapor Deposition)：
An method
for forming a thin layer of a substance. Involves forming a layer on substrate
material heated in a reaction vessel by feeding in a raw material gas containing
the components of the target layer, and allowing a chemical reaction to proceed
in the vapor phase or on the substrate surface.
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