Lip Relief Angle, Lip Clearance Angle, cutting tools, Lip Relief Angle Function
There are several kinds of cutting tools:
The grinding of the ball end milling cutter does not change the diameter, but the flat end milling cutter reduces the diameter. It depends on the user’s specific processing.
The Ball End Mill Re-Sharpener, produced by PURROS, can be used to grind the milling cutter according to the customer’s needs.
The screw tap can be sharpened 2-3 times, especially the large diameter screw tap. The grinding of the screw tap mainly depends on its cost. The screw tap is usually uncoated after grinding.
Reamer is also a cutting tool that often needs to be sharpened. Its grinding method is relatively simple. Because of the higher requirement for the reamer precision, can be repaired 2-5 times generally. Before grinding the reamer, it is necessary to detect the diameter of the cutter. If the diameter is not within the required range, it can be repaired no longer. After grinding, the coating of the reamer has no coating.
The drill bit is the best cutting tool for grinding.
The design should consider the need for grinding.
For preprocessing or general hole accuracy, degree of the drill bit grinding is worn at most 20 times. For high precision drilling bit, it can be sharpened 5 times.
- Cause: Feed rate is too large
Solution: Decrease feed rate, because too large feeding that will increase the cutting resistance.
- Cause: Point dimensions are not suitable
Solution: Select correct point dimensions, for example: the point angle is small, but the rigidity of cutting material is big.
- Cause: Tool materials is not suitable
Solution: Choose a suitable tool material that means choosing a bigger rigidity of material for making cutter.
- Cause: Relief angle is too small
Solution: Increase relief angle, because too small relief angle will Increase the wear and tear of flank face.
In the process of metal cutting, twist drill cuts the metal layer on the workpiece, at the same time, the workpiece and chips acts on the twist drill, causing the twist drill wear off. Normal wear off is inevitable, but abnormal wear is not acceptable. Such as abnormal wear on corner part of twist drill, Now, PURROS Machinery will enumerate these questions, and how to solve them.
In production, chipping of corner edge twist drill is happened many times. Because of drill material, loose jig, uneven hardness of workpiece material, unsuitable feed speed, unsuitable coolant, relief angle too small, or exhausted bit, etc.
Situation 1: Continue reading