The spindle speed of the CNC machine tool is very high, and the output power of the spindle is relatively large. Compared with the traditional cutting method, the requirements for the milling cutter are more stringent, and the requirements for the elements of rigidity, precision, durability, and strength are more stringent. At the same time, dimensional stability is required, and installation and adjustment are convenient. This series of questions all put forward very strict requirements on the standardization and serialization of the structure and geometric parameters of the cobalt drill bits for hardened steel. To improve the efficiency of milling processing, the choice of CNC cobalt drill bits for hardened steel is particularly important. Therefore, for the choice of stainless steel cobalt drill bits for hardened steel, the editor briefly introduces the factors to be considered in the selection of stainless steel milling cutters.
One, when choosing a milling cutter, the cutting performance of the milling cutter material should be considered. For example, when processing titanium alloy, high-strength steel, and stainless steel workpieces, our company recommends choosing indexable carbide milling cutters with better wear resistance.
2. We can choose stainless steel cobalt drill bits for hardened steel according to the different processing stages of the workpiece. For example, in the rough machining stage, our main purpose is to remove the margin, then we can choose a large milling cutter with better rigidity, lower precision, and higher chip removal performance. In the semi-finishing and finishing stages, The main thing is to ensure the processing accuracy and product quality of the workpiece. At this time, you should choose the cobalt drill bits for hardened steel with higher durability and higher precision.
3. Choose cobalt drill bits for hardened steel according to the characteristics of the area to be processed. When the workpiece processing permits, we can choose a milling cutter with a larger diameter and a smaller length-to-diameter ratio; when we are processing thin-walled and ultra-thin-walled workpieces, the end edge of the over-center milling cutter should have sufficient centripetal angle , In order to reduce the cutting force of the milling cutter and the cutting part. When processing soft workpieces such as aluminum and copper, an end mill with a slightly larger rake angle should be used, and the number of blades should not exceed 4 as far as possible.
Fourth, when we select the appropriate cobalt drill bits for hardened steel, we try to make the size of the milling cutter fit the surface size of the workpiece to be processed as much as possible. In actual production, for the peripheral contour processing of flat workpieces, end mills are usually used; when milling planes, cemented carbide milling cutters are preferred; when processing bosses and grooves, high-speed steel end mills are preferred; in machining When roughing the surface of the blank or the hole, it is recommended to use corn cutters with carbide inserts; when processing some three-dimensional profiles and variable bevel contour contours, use ball-end milling cutters, ring cutters, tapered milling cutters and discs. More knives.
5. For the processing of free-form surfaces, because the end cutting speed of the ball head cobalt drill bits for hardened steel is zero, at this time, in order to ensure the accuracy of the processing, the cutting line spacing will be very small, so the ball end milling cutter has some advantages for surface finishing. High degree of friendliness. However, the advantages of end milling cutters compared with ball-end milling cutters are more obvious in terms of surface processing quality and efficiency. Therefore, when ensuring that there is no overcutting in the processing of workpieces, we try to choose end mills when roughing and semi-finishing the surface. Milling cutter. In addition, the durability and accuracy of milling cutters have a greater impact on the price of milling cutters.
