Improper selection of screw tap
1. use the precision series to fit the screws.
2. increase the length of ingestion.
3. reduce the rake angle.
4. choose the tap with the same heart and wide back.
5. adjusting the cutting angle of the cutting cone length.
Chip clogging
1., we should use the forward wire attack or the spiral wire attack.
2. reduce the number of screws and expand the trench volume.
3. use fine thread.
4. increase the diameter of the hole as much as possible.
5. blind hole as far as possible to deepen the bottom hole.
6. shortening tapping length
7. use his cutting oils and oil injection methods.
8. select internal cooling taps.
Inappropriate use conditions
1. adjust the cutting speed.
2. prevent screw attack from lower hole eccentric or inclined.
3. screw tap or fixed work with floating type.
4. feed speed should be appropriate to prevent Asan deformation.
5. adopt forced feed mode (pitch feed mode).
6. properly choose the processing ability of tapping machine.
7. prevent spindle vibration
8 use flexible tapping cone.
bond
1. use screws with surface oxidation film treatment.
2. use cutting oil with high melting resistance.
3. reduce cutting speed
4. change cutting angles to make cutting materials suitable.
5. select internal cooling taps.
6. shortening thread length
Reduction of inner diameter of internal thread
Improper selection of screw tap
1. use more screws to attack.
A. has less expansion for cutting materials such as copper alloy, aluminum alloy and cast iron.
B. is cut easily, such as tubes or thin plates.
2., eat into the clearance angle should be appropriate.
3. increase cutting angle
4. increase the front corner.
5. increase the number of slots.
Internal thread injuries
When rotary is launched, especially the wire attack will leave the inner thread, the speed should be appropriate so as not to cause any damage.
Chip residue in internal thread
1. increase the sharpness of the tap and reduce the residue of its whiskers.
2. check the internal threads only after completely removing the remaining chips.
Cracking or biting marks
The intake length is not enough.
1. increase the length of the front part.
2. cutting angle is not appropriate.
3. cutting angles should be matched with working material.
bond
1. screw thread machining with clearance angle.
2. reduce the thickness of the blade.
3. use surface treated screws to attack.
4. change the type of cutting oil and the way of oil injection.
5. reduce cutting speed
Chip clogging
1., we should use the forward wire attack or the spiral wire attack.
2. enlarge the lower aperture.
Tapping vibration wave
Excessively sharp
1. reduce cutting angle
2. grinding the clearance angle between the small thread parts
Improper grinding
1. avoid cutting edge thickness too small.
2. do not grind the bottom of the ditch.
3. about the durability of screw attack.
Taps break
Chip clogging
1. replace tap material
2. to prevent iron filings from blocking (or using the forward wire attack, spiral wire attack, no groove wire attack).
3. increase the chip tank.
4. cleaning the bottom hole and cutting chips around the workpiece.
5. ensure removal of chip space.
Excessive torque in cutting
1. expand the hole as far as possible.
2. shortening tapping length
3. use fine thread.
4. in order to increase the sharpness of screw attack, increase the cutting angle.
5. in order to reduce friction and torque, the clearance angle of threaded part can be slightly increased, and the thickness of the blade will be reduced.
6. use spiral wire to attack
Inappropriate use conditions
1. reduce cutting speed
2. prevent screw attack from lower hole eccentric or inclined.
3. the clamping action of screw attack adopts floating type.
4. adjustable tapping device.
5. do not pass through the hole, prevent screws from hitting holes.
6 prevent working hardening of bottom hole.
7. maintain stable feed.
8. remove iron filings from the previous process.
9. investigate the hardness and uniformity of machined materials.
Improper grinding
1. do not grind the bottom of the ditch.
2. avoid excessive blade thickness.
3. wear parts should be worn away.
4. early regrinding time
Blade avalanche
Improper selection of screw tap
1. reduce cutting angle
2. transform screw tap material
3. reduce hardness
4. eat in and lengthen.
5. prevent chip blockage.
6. shortening thread length
7. remove all wearing parts.
8. avoid cutting edge thickness too small.
Inappropriate use conditions
1. reduce cutting speed
2. prevent center deviation and avoid eating time.
3. do not haste to turn through holes.
4. increase intake length
5. use flexible tapping fixture.
6. improving coaxiality
7. prevent working hardening when machining bottom hole.
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