Machine Machine, Pleating Assembly Special for Water Filter (ZDS-600), China Machine Anping County ShunXing Hardware Wire Mesh Co., Ltd. , http://www.shunxing-fence.com
The development of new cutting materials has resulted in a variety of new tools. They must achieve high speeds, high feed rates, good workpiece quality and longer life. HSC tools and tool systems can be divided into three categories according to their structure and blade fixing method: the overall structure, with fixed blade holder and adjustable blade holder. The supplementary classification method can be carried out according to the application field of the HSC tool. Such as the face milling process and application in the mold, model and modeling manufacturing.
Cutting material selection
HSC tools require materials that can accommodate high speed cutting. In order to obtain high workpiece processing quality and optimum life time, in addition to cemented carbide, cermets, coated cutting materials and cutting ceramics, single crystal and polycrystalline cutting materials are also used. In addition to technical requirements, these cutting materials should meet the economic and environmental performance requirements of important positions. In HSC processing, PKD (polycrystalline diamond) and CBN (cubic boron nitride) can significantly improve processing efficiency. In the mass production of the automotive and aerospace industries, non-metallic parts are increasingly being used. At this time, the polycrystalline diamond cutting material is selected, and a high surface quality can be obtained under conditions of large feed amount and large cutting amount. When a suitable tool system and cutting material are selected, the roughing and finishing processes can be completed with one cut.
In the mold manufacturing industry, basically one-piece production. Castings and steels up to 64HRC hardness, CBN cutting materials are available. In the model and shape manufacturing industry, when machining with cemented carbide cutting materials, the rotation speed should be greater than 16000r/min, and the feed rate Vf should be greater than 5m/min to obtain the best cutting results.
Safety and reliability of HSC tools
In addition to selecting the appropriate tool material, in the tool design process, the reliability of the tool member fixation under centrifugal force should be considered first, and the structure that conforms to the "balance" should be noted. The maximum speed test of the tool is required. In addition, good manufacturability is also important when manufacturing tools. Valuable and reliable manufacturing methods are decisive for the pre-treatment of the tool and the production of the cutting edge. This is especially true for tools with PKD or CBN inserts.
In order to achieve the highest machining quality and optimum economic performance when applying HSC tools, not only the tool itself, but also the interface between the tool and the clamping system, ie the stability of the spindle and the tool connection surface and the workpiece installation. Of particular importance for the interface portion and the extension rod are radial oscillation accuracy, cantilever length, vibration performance and interchangeability. In order to meet the requirements of the radial oscillating precision of the cylindrical shank during finishing, the hydraulic chuck, the shrink collet and the force compression collet are first selected. When these collets are matched with the HSC interface, the radial oscillating accuracy can be It reaches 0.003mm.
Fully machined tool system
The variety of tools produced can be applied to traditional Machine tools and HSC machines. It can produce a wide range of interchangeable insert milling cutters from roughing, semi-finishing to super-finishing, as well as tools for HSS-E, VHM and Cermet cutting materials, as well as tools with PKD and CBN inserts, as well as various Extension rods with different shanks. The desired profile surface and the free profile of the mold can be fully processed. The most commonly used tools in the mold manufacturing industry are spherical profiling cutters, ring milling cutters and end milling cutters. The machining time and the surface quality of the workpiece are determined by the tool. In the processing, the spherical milling cutter maintains a proper angle (15 ° ~ 25 °) with the surface of the workpiece, which can achieve satisfactory processing results. Because this can avoid the critical section and the cutting center (the cutting speed drops to zero). It is beneficial to maintain a constant cutting speed during the application of PKD and CBN cutting materials.
In the field of model processing, the same tool system as in the mold manufacturing industry can be applied. The condition is that there is a positive rake angle on the cemented carbide insert, and the sharp angle insert should be particularly lengthened during roughing. The tool for the special interchangeable insert developed for this machining can be applied to high-speed cutting machines.
Mold manufacturing cutting tool system
For high-speed machining HSC, it is necessary to configure a suitable tool system. For example, PKD or CBN cutting materials can be used to complete the machining of the workpiece. In order to achieve efficient high-speed machining, it is necessary to equip with a cutting tool with a certain geometry. The efficiency can be greatly improved only if the entire system, including the tool, is adapted.