HSS twist drill production process commonly used for FULLY GROUND, ROLL FORGED, MILLING.
Fully ground twist drill, cost performance is particularly high, special durable, generally 1 can drill more than 300 holes!Very awesome, and it's made of stainless steel.Full mill is a bit formed by integral machining.
2. Rolling process: the feature of Rolling process is that the progressive shaped fan plate is hot rolled into a straight groove, then twisted into a spiral groove, and processed to the standard requirements.The advantages of this process are high production efficiency, can make full use of raw materials, the processed bit blank body has fiber continuity, grain refinement, uniform carbide distribution, high red hardness
3. Milling process is a traditional manufacturing method, which is characterized by the use of forming Milling cutter in the rough twist drill has not hardened Milling to meet the requirements of the shape of the spiral flute, and then after the heat treatment processing to the standard requirements.The cutting tool cost is high, the processing time is long, and the geometric shape error during quenching is almost all reflected in the finished bit from the time of heat treatment to the time of processing to the final shape, and the quality fluctuates greatly.Milling the main process flow: blanking → connecting handle → turning processing → milling Flute → rough flute→ cleaning → deburring → heat treatment → finishing
