(1) thread cutter accelerated wear or excessive wear
① Cause: cutting speed and feed rate choice is incorrect.
Solution: Make sure to select the correct cutting speed machining parameters from the table and feed.
② causes: too much pressure on the tool.
Solution: Reduce the amount of feed per tooth; shorten tool change time interval; excessive wear checks CNC tool – at the start of the thread will wear fastest.
③ causes: incorrect choice of coating, resulting in BUE.
Solution: To study the applicability of other coatings; increased coolant flow rate and flow.
④ Reason: Spindle speed is too high.
Solution: Reduce the spindle speed.
(2) cutting edge chipping
① Cause: cutting speed and feed rate choice is incorrect.
Solution: Make sure to select the correct cutting speed machining parameters from the table and feed.
② Reason: thread mills from moving or slipping on their holding device.
Solution: use hydraulic chuck.
③ causes: lack of machine tool rigidity.
Solution: Make sure the workpiece clamping reliable;, if necessary, re-clamp the workpiece clamping or improve stability.
④ causes: insufficient coolant pressure or flow.
Solution: Increase the coolant flow rate and flow.
Appears on the stairs (3) thread type
① Cause: Feed rate is too high.
Solution: Reduce the amount of feed per tooth.
② Reason: ramping processing program using axial movement.
Solution: Make sure the thread cutter on the large diameter of the thread milling teeth-shaped curve, and not to move radially.
③ Cause: Thread milling excessive wear.
Solution: Shorten the tool change time interval.
④ Cause: tooling parts and clamping parts too far away.
Solution: the shortest possible tool overhang on the clamping device.
(4) test results there is a difference between the workpiece and the workpiece
① Cause: tooling parts and clamping parts too far away.
Solution: the shortest possible tool overhang on the clamping device.
② causes: incorrect choice of coating, resulting in BUE.
Solution: To study the applicability of other coatings; increased coolant flow rate and flow.
③ Cause: Thread milling excessive wear.
Solution: Shorten the tool change time interval.
④ causes: the work shift on the fixture.
Solution: Make sure the workpiece clamping reliable;, if necessary, re-clamp the workpiece clamping or improve stability.

This article was written by: admin

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