Screw tapping is inappropriate
1. Screw tapping suitable for use of precision series
2. Increase the length of the feed
3. Reducing the front corner
4. Choose the taps with the same center wide spade back
5. Adjust the spade back angle of the cutting cone length
Chip clogging
1. Apex filament attack or spiral filament attack shall be used
2. Reduce the number of grooves by screws and expand the volume of the grooves
3. Use of fine thread
4. Maximum lower aperture
5. The blind hole is used to deepen the bottom hole as much as possible
6. Shortening the length of attack
7. Switch to alternative cutting oil and oil injection
8. Internal cooling tap
Inappropriate conditions for use
1. Adjusting cutting speed
2. Prevent screw tapping from eccentricity or inclination of the lower hole
3. Screw tapping or working fixed to floating type
4. Feed speed should be appropriate to prevent Yashan deformation
5. Forced feed (pitch feed)
6. Suitable selection of the processing capacity of the tapping machine
7. Preventing spindle vibration
8. Use flexible tap
Bond
1. Screw tapping with surface oxide film treatment
2. Switch to cutting oil with higher anti-meltability
3. Reducing cutting speed
4. Change the cutting angle to fit the cutting material
5. Internal cooling tap
6. Reduction of thread length
Reduction of center diameter of internal thread
Screw tapping is inappropriate
1. Use of increased screw attack
A. for cutting materials such as copper alloy, aluminum alloy, cast iron, etc., the expansion rate is less.
B. easy rebound of cut materials, such as tubes or sheets, etc.
2. Eat into the gap angle to be appropriate
3. Increasing cutting angles
4. Increase the front corner
5. Increase in the number of slots
Internal thread trauma
When turning and rolling, especially the tapping will be away from the inner thread, the speed should be appropriate to avoid damage
Chip residue in internal thread
1. Increase the sharpness of the tap and reduce the residue of the whisker chip
2. Check internal threads with gauges only after residue chips have been completely removed
A crack or bite.
On the problem of Machining Surface of Internal Thread
The length of the ingress is not long enough.
1. Increase the length of the feeding part of the apex
2. Inappropriate cutting angles
3. The cutting angle should be matched with the material of the working object
Bond
1. Tapping with screw with clearance angle in thread part
2. Reducing the thickness of the edge
3. Tapping with surface treated screws
4. Change the type of cutting oil and the way of oil injection
5. Reducing cutting speed
Chip clogging
1. Apex filament attack or spiral filament attack shall be used
2. Increasing the aperture
Vibration wave too sharp
1. Reducing cutting angles
2. Angle of clearance between small threaded parts
Regrinding is not appropriate
1. Avoid too small edge thickness
2. Do not grind the bottom
Tap fracture
On the durability of screw tapping
Chip clogging
1. Change material SKS2 to SKH
2. Prevent iron filaments from clogging (or use apex silk attack, spiral filament attack, no sulcus attack)
3. Increase the chip-holding tank
4. Removal of chips from the bottom hole and around the workpiece
5. Ensure that chip space is cleared
Excessive cutting torsion
1. Maximize the size of the lower aperture
2. Shortening the length of attack
3. Change to fine thread
4. Increase the cutting angle in order to increase the sharpness of screw attack
5. In order to reduce friction and torsion, the clearance angle of thread can be slightly increased and the thickness of edge can be reduced.
6. Use of spiral wire attack
Inappropriate conditions for use
1. Reducing cutting speed
2. Prevent screw tapping from eccentricity or inclination of the lower hole
3. Screw clamping adopts floating type
4. Change to adjustable gripper
5. Do not pass through the aperture under the hole to prevent screw tapping against the bottom of the hole
6. Prevention of work hardening of the bottom hole
7. Maintaining stable feed
8. Removal of iron chips from the previous process
9. Investigation of hardness of processing materials and uniformity of structures
Regrinding is not appropriate
1. Shall not grind the bottom
2. Avoid too small blade thickness
3. Wear and tear should be worn out
4. Early regrinding time
Edge collapse
Screw tapping is inappropriate
1. Reducing cutting angles
2. Change screw tapping material
3. Reducing hardness
4. Lengthening of the food intake
5. Prevent chip clogging (use of spindles)
6. Reduction of thread length
7. Full removal of wear and tear parts
8. Avoid excessive blade thickness
Inappropriate conditions for use
1. Reducing cutting speed
2. Prevent central deviation and avoid eating time balance
3. No rapid turn shall be made when the hole is not through
4. Increase the length of the feed
5. Use flexible tapping fixture
6. Increasing coaxiality
7. Prevent working hardening of bottom hole