(1) Accelerated wearing or excessive wearing of thread milling cutter
① Cause: cutting speed and feed selection is incorrect.
Solution: Ensure that the correct cutting speed and feed are selected from the machining parameter list.
② Cause: the cutting tools are overloaded
Solution: reduce the feed per tooth; Shorten tool change time interval; Check the tool for excessive wearing – the starting thread will wear the fastest.
③ Cause: the selection of the coating is not correct, resulting in chip tumors.
Solution: Study the applicability of other coatings; Increase coolant flow rate and flow rate.
④ Cause: the spindle speed is too high.
Solution: Reduce the spindle speed.
(2) Cutting edge tipping
① Cause: cutting speed and feed selection is incorrect.
Solution: Make sure to select the correct cutting speed and feed from the machining parameter list.
② Cause: the thread milling cutter moves or slips on its clamping device.
Solution: Hydraulic chuck.
③ Cause : machining machine rigidity is insufficient.
Solution: to determine the workpiece clamping reliable; If necessary, re-clamp the workpiece or improve clamping stability.
(4) Cause: insufficient coolant pressure or flow.
Solution: increase the coolant flow rate and flow.
(3) Steps on the thread tooth
① Cause: the feed rate is too high.
Solution: Reduce the feed per tooth.
② Cause: the machining programming of slope milling uses axial movement.
Solution: Ensure that the thread milling cutter in the large diameter of the thread milling out the tooth curve, without radial movement.
③ Cause: excessive wear of thread milling cutter.
Solution: Shorten the time interval of tool change.
(4) Cause: the tool processing part and the clamping part are too far apart.
Solution: shorten the overhang of the tool on the clamping device as far as possible.
(4) Machining difference workpiece to workpiece
①Cause : the tool processing part and the clamping part are too far apart.
Solution: shorten the overhang of the tool on the clamping device as far as possible.
② Reason: the selection of the coating is not correct, resulting in chip tumors.
Solution: Study the applicability of other coatings; Increase coolant flow rate and flow rate.
③ Cause: excessive wear of thread milling cutter.
Solution: Shorten the time interval of tool change.
④ Reason: the workpiece shifts on the fixture.
Solution: to determine the workpiece clamping reliable; If necessary, re-clamp the workpiece or improve clamping stability.
