I believe that when CNC treatment encountered a tap break, the quality of the product is not qualified.
1. The quality of the tap is not good
Main materials, design of CNC knives, heat treatment, treatment accuracy, coating quality, etc. For example, the difference in size between the transition from the TAP section is too large or the transition corner is not designed to cause a constraint concentration. The distance between the transition of transverse section of the handle and blade exchanger is too close to the welding port, which means that the complicated welding constraint is concentrated with the concentration of constraint to the transition of cross section, which generates a large concentration of constraint, causing to interrupt the tap. For example, the heat treatment process is inappropriate. When the tap fever is treated, if the caliber is heated, it can cause cracks without preheating, heat or excessive burn, not reactivity or cleaning over time, and premature cleaning. To a large extent, this is also an important reason why the overall performance of the inner TAP is not as good as importing taps.
2. Inappropriate choice of tap
For attacks with too high hardness, high quality taps must be used, such as cobalt high -speed steel taps, hard alloy valves, coating taps, etc. In addition, different TAP conceptions are applied on different work occasions. For example, number, size, angle, etc. Tap remains have an impact on the performance of crumbs.
3. The tap is not suitable for treatment material
In recent years, this problem has been paid more and more. With the continuous increase and the difficulty of processing new materials, in order to meet this need, the variety of tool materials also increases. This requires choosing an appropriate tap product before attacking.
4. The diameter of the lower hole is small
For example, when processing the M5 × 0.5 thread in black metal, the cutting tap with a cutting tap should be used with a selected diameter of 4.5 mm forest. It is recommended to choose the correct lower hole diameter depending on the types of taps and different attack materials.
5. Material problem
The material of the attack is impure, and there are points or strong stomachs in the region, which means that the tap loses balance and breaks instantly.
6. The tool machine does not meet the precision requirements of the tap cone
The machine tools and pliers are also very important, in particular for high quality valves, as long as a certain precision machine tool and the tightening body can exercise the performance of the TAP. The common thing is that the same is not enough. At the start of the attack wire, the starting position of the tap is incorrect, that is to say that the midline of the axis of the spindle and the bottom hole is different, and the couple during the attack is too large. The tap.
7. Cut the liquid, the quality of the lubrication oil is not good
Many national companies have started to be careful.
8. The cutting speed is unreasonable
When there is a treatment problem, most domestic users in China reduce cutting speed and reduce the amount of flow. The opening and the thread are not checked, and the problems of the terrifying are of course even more inevitable. However, the speed of the power supply is too fast, and the torque caused by an excessive torque can easily cause the tap cut. The cutting speed during the machine attack is generally 6 to 15 m / min; min. In the same material, the diameter of the tap is small and the lower value of the tap is low.
9. The technique and skills of the operator did not meet the requirements
These problems should be judged or comments to technicians, but most national operators in China do not pay enough attention. For example, when processing the blind hole threads, when the tap is about to contact the bottom of the hole, the operator did not realize that the attack speed of the attack when the bottom of Hole was not reached, or the tap was made by force when the dumping ground was not smooth and the tap was broken. It is recommended to strengthen the sense of responsibility.
You can see from the above, there are many reasons to cause demons. As a qualified and responsible sword application engineer, the most important thing is to go deep into the scene and not only to imagine.
Daguang focuses on providing solutions such as precision CNC machining services (3-axis, 4-axis, 5-axis machining), CNC milling, 3D printing and rapid prototyping services.
