Advantages of high-speed CNC machining technology for connecting rod molds

The application of high-speed machining technology can simplify the process and improve the quality of the workpiece. When processing molds, using high-speed cutting can increase the processing feed rate, reduce processing time and reduce manufacturing costs. If you keep the cutting time constant, you can reduce the amount of feed, increase the number of cuts, and reduce the cutting force, thereby improving the surface finish, so that all parts that are manually polished can be saved or reduced to a minimum.

(1) Increase the speed of connecting rod mold processing. The use of high-speed machining technology enables the tool to work at a very high speed (generally more than 15000rmin-1), and at the same time enables the machine tool to have high feed speed and acceleration, which greatly improves the metal removal rate. In medium and finishing machining, although the high-speed machining adopts very small feed and cutting depth, compared with the material removal speed, high-speed machining is 2 to 4 times faster than ordinary machining, which still improves productivity and reduces production. Cycle; At the same time, high-speed machining can perform hard cutting. According to its processing characteristics, it can obtain high surface quality and shape accuracy, which is more than 50% more efficient than electrical discharge machining (EDM), and reduces the cost of manual grinding and polishing of molds time.

(2) High-quality processed surface can be obtained. High-speed cutting can reduce the cutting force, reduce the cutting vibration, and improve the processing quality; increase the cutting speed and feed speed to reduce the feed rate, thereby improving the shape accuracy and surface roughness of the workpiece, and the processing surface roughness of Ra≤10μm can be obtained . Most of the high-speed cutting heat is taken away by the chips, the workpiece generates less heat, and the shape accuracy can reach 5μm.

(3) It can directly process high-hardness connecting rod mold materials. For example, machining modules with a hardness of 60HRC poses a challenge to the EDM machining method. (Guide: Analysis of the characteristics of high-speed processing machine tools in mold manufacturing)

(4) Extend the life of connecting rod mold. Avoid surface damage caused by EDM processing and increase mold life by 20% to 50%.

(5) The repair process of connecting rod mold is more convenient. In the forging process, if the mold cavity is partially damaged, it needs to be repaired many times to extend the service life of the mold. In the past, the methods used mainly rely on electrical discharge machining to complete. But now, using high-speed machining technology and the original NC program, there is no need to reprogram, and the mold cavity can be quickly repaired accurately and without error.

(6) Simplified the process of connecting rod mold processing. The traditional method of processing connecting rod forging dies is to perform metal cutting before quenching and then quenching, because quenching is prone to deformation of the mold, and must be manually trimmed or formed by electrical discharge machining. With high-speed machine tool processing technology, the quenched mold material can be directly processed through high-speed processing to form a mold cavity, which saves the process and costs of electrode materials, electrode processing and electrical discharge machining mold cavities, and can also avoid electrical discharge machining. The resulting surface hardening and microscopic cracks. High-speed machining can use smaller diameter cutters to finely process fillets and molds, eliminating the need for manual trimming processes, thereby achieving the goal of reducing production costs.

(7) Conducive to more complex connecting rod mold profile processing. The forming surface is processed by hard cutting, the surface quality and shape accuracy are greatly improved, and lower roughness values u200bu200band higher surface finishes can be obtained, and the processing of complex surfaces is more advantageous; combined with CAD/CAM rapid processing technology, High-speed machining is especially suitable for the machining of molds with complex shapes.

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