Main advantages of Taper Shank Drill Bit: ①Save steel. Shank Drill Bit forming processing is to process spiral grooves by removing the blank material by forming milling cutters, while Twist Drill forming processing is chip-free processing. The material is extruded and elongated by repeatedly rolling the outer circle of the blank, and then passed through a twist groove machine. The spiral groove is processed, which saves the high-speed steel material relatively. ② high production efficiency. Taking the 26mm taper shank twist drill as an example, the milling time for each piece of Taper Shank Drills is 3.5min for groove and edge cleaning, while the rolling and twisting method only takes 0.5min, and the production efficiency is increased by 7 times; with a 33mm taper shank Take a twist drill as an example, when milling the groove and edge of the twist drill, the milling time is 8.94 minutes per piece, while the rolling and twisting method only takes 1.47 minutes, and the production efficiency is increased by 6 times; with a 40mm taper shank twist drill For example, when milling the groove and edge of the twist drill, the milling man-hour is 12.5 minutes per piece, while the rolling and twisting method is 1.71 minutes, and the production efficiency is increased by nearly 7 times. ③ Improve internal quality. The groove shape of the rolled twist drill needs to be repeatedly rolled (3-4 times) during the forming process. The rolled and twisted twist drill products of our company are formed by rolling 4 times, which does not damage the internal fibers of the metal, and the core structure of the material is better. Dense, the incremental parameters of the core thickness of the product are relatively stable, and due to the deformation generated at high temperature, it can play the role of refining the grain structure, improve the distribution of carbides, make it more uniform, and improve the internal quality. ④ Improve product hardness. Due to the refinement of the internal grains, the hardness of the working part of the twist drill rolled and twisted after heat treatment can reach 65.3-65.8HRC, while the hardness of the working part of the twist drill processed by the milling method can only reach about 64.5HRC after heat treatment. ⑤ reduce costs. This process can not only save materials, but also greatly improve labor productivity, reduce production equipment and operators, and reduce plant area and work card and measuring Tool materials.
