Normal problems and solutions for threading tools machining:
| Problem | Cause | Solution |
Over wear on
clearance face
| Cutting speed too high. | Reduce cutting speed |
| Low cutting depth, abrasion. |
Reduce frequency of feed and
friction of cutting edge.
| |
| Inserts are over the center line | Adopt correct center height. | |
Asymmetric wear on
right and left cutting
edge
|
The inclined angle of insert is
different from the helical angle of
thread
|
Change to proper shim to get
correct inclined angle.
|
| Flank in-feed is not correct. | Change the way of flank in-feed. | |
| Breakage | Cutting speed too low. | Increase cutting speed. |
| Cutting force too high. |
Increase frequency of feed and
reduce Max in-feed.
| |
| Unstable clamping. |
Check if workpiece vibrates.
Reduce overhang of tool.
Verify clamping of workpiece
and tool
| |
| Chip twisting. |
Increase the pressure of cooling
liquid to blow away chips
| |
| Plastic deformation |
High cutting speed, high
temperature on cutting area
|
Reduce cutting speed.
Increase feed frequency and
reduce Max cutting depth
|
| Insufficient cooling fluid. | Increase cooling fluid supply | |
Low thread surface
quality
|
Cutting speed too low.
The insert is over the center line.
Chips are not under control.
|
Increase cutting speed.
Adjust centre height.
Change the operation way of
tools to well control chips.
|
| Incorrect profile | Incorrect center height. | Adjust centre height |
| Pitch on machine is not correct. | Adjust machine. | |
| Shallow profile | Cutting speed set wrong. | Alter cutting depth |
| Surface damage | Chips involved or contacted. |
Change to flank in-feed to control chip flow
direction
|
| Built-up edge |
Temperature of cutting edge is too
low.Usually occur when machining
stainlesssteel and low carbon steel.
|
Increase cutting speed as well
as pressure andconcentration of cooling fluid.
Choose inserts with good
toughness
|
| Crack on surface | Cutting force too high |
Reduce the cutting depth of
each feed.
|
| Vibration |
Incorrect clamping of workpiece or
tool
|
Verify clamping of workpiece
and tool. Minimize overhang
of tool.
|
| Incorrect cutting parameters |
Increase cutting speed or
reduce it substantially.
| |
| Incorrect tool clamping | Adjust center height |
Shenzhen Lys Technology Co., Ltd
Company address: 20th floor, Saigeyuan building C, Huaqiang south road, Futian district, Shenzhen China
Factory address: No. 57 Jinshan industrial park, Hetang district, Zhuzhou City, Hunan province China
Tel: 0086-731-22397993 Fax: 0086-731-22623865
E-mail: peter@lystechnology.com linda@lystechnology.com
Factory address: No. 57 Jinshan industrial park, Hetang district, Zhuzhou City, Hunan province China
Tel: 0086-731-22397993 Fax: 0086-731-22623865
E-mail: peter@lystechnology.com linda@lystechnology.com
Website: www.lystechnology.com www.lyscarbide.com http://lystechnology.en.gasgoo.com
e tool holder for steel
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