2014-2015 Полный каталог инструмента Mitsubishi (Митсубиси) EN
для заказа - info@mitsubishitools.ru
THREADING
TROUBLE SHOOTING
Problems Observation Causes Solutions
Incorrect tool installation. Set the insert centre height at 0mm.
Low thread precision. Threads do not Check holder inclination (Lateral).
mesh with each
other.
Shallow thread. Incorrect depth of cut. Modify the depth of cut.
Poor surface finish. Surface damage. Lack of insert wear or plastic Refer to "Quickly generated flank wear." and "Large
deformation resistance. plastic deformation." below.
Surface tears. Chips wrap around or clog the work Change to flank infeed and control the chip
pieces. discharge direction.
Change to an M-class insert with a 3-D chip breaker.
The side of the insert cutting edge Check the lead angle and select an appropriate
interferes with the workpiece. shim.
Built-up edge (Welding). Increase cutting speed.
Increase coolant pressure and volume.
THREADING Cutting resistance too high. Decrease depth of cut per pass.
Surface vibrations. Cutting speed too high. Decrease the cutting speed.
Insufficient work piece or tool Re-check work piece and tool clamping. (Chuck
clamping. pressure, clamping allowance)
Incorrect tool installation. Set the insert centre height at 0mm.
Short tool life. Flank wear quickly Cutting speed too high. Decrease the cutting speed.
generated.
Non-uniform wear of Too many passes causes abrasive Reduce the number of passes.
the right and left sides wear. Do not re-cut at 0mm depth of cut, larger than
of the cutting edge. Small depth of cut for the finishing 0.05mm depth of cut is recommended.
pass. Check the work piece lead angle and select an
The work piece lead angle and the appropriate shim.
tool lead angle do not match.
Increase cutting speed.
Chipping and fracture. Cutting speed too low. Increase the number of passes and decrease the
cutting resistance per pass.
Cutting resistance too high. Check work piece deflection.
Unstable clamping.
Shorten tool overhang.
Re-check work piece and tool clamping. (Chuck
pressure, clamping allowance)
Chip packing. Increase coolant pressure to blow away chips.
Large plastic Non-chamfered work pieces causes high Change the tool pass to control chips. (Lengthen
deformation. resistance at the start of each pass. each pass to allow the coolant to clear the chips.
High cutting speed and large heat Change from standard internal cutting to back
generation. turning to prevent chip jamming.
Chamfer the workpiece entry and exit faces.
Decrease the cutting speed.
Lack of coolant supply. Check coolant supply is sufficient.
Cutting resistance too high. Increase coolant pressure and volume.
Increase the number of passes and decrease the
cutting resistance per pass.
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