The continuous upgrading of aerospace products, especially with the widespread use of various composite materials and difficult-to-machine materials, is gradually improving its processing technology. At present, tools in PCD and PCBN materials are increasingly used in the aerospace industry. PCD tools have been recognized and widely used for their superior cutting performance and durability as well as high toughness. However, because of the high hardness, the difficulty of tool sharpening has been plaguing many users. PCD tools not only have high procurement costs, The cost of grinding in the later stage is also very high, and the general grinding cycle is also relatively long. Therefore, the manufacture and grinding of PCD-type tools has been a common concern for many tool manufacturers and users.
Japan Rhombus RYOCO specializes in the development and development of PCD tool PCBN tools for various tool materials and various types of CNC equipment with various processing methods. Its technology has been recognized by the market for many years. As we all know, because of the price factor of PCD cutters, PCD inserts are generally welded to the base of cemented carbide. Therefore, from the perspective of processing efficiency, it is very slow for PCD materials to be electrolyzed or ground. Therefore, the Japanese Rhombus RYOCO equipment uses its unique double-end grinding shaft structure, and a diamond grinding wheel is mounted on the main shaft 1 to grind the hard alloy portion of the tool to complete the second and third relief angles of the tool. Then, the first rear corner of the tool and the contour are processed by discharge using an electrolytic copper wheel on the main shaft 2. The efficiency and quality of the electrolytic machining are also controlled in the program, and the surface quality after rough finishing into four steps can reach Ra 0.1 μm. However, in the actual processing and grinding, the high hardness and high wear resistance of the PCD material bring great difficulties to the processing. For many years, most of the EDM or chemical processing and laser processing techniques on the market are often more suitable for the application of roughing tools. In order to obtain the highest surface quality of PCD, the most ideal processing method is still inseparable. cut.
Although the functions of grinding and electrolysis are also integrated, the unique process technology in grinding ensures the reliability and stability of the process. The control of the constant grinding force keeps the grinding wheel always attached to the surface of the machined PCD, thus avoiding the excessive wear of the grinding wheel due to the increase of the grinding force, resulting in a gap between the grinding joint surface and avoiding the reduction of the grinding force. The surface quality of the tool is reduced. Similarly, the grinding ratio is very small when machining PCD materials, so the machining time is relatively longer. Therefore, the control and guarantee of constant grinding pressure can ensure the accuracy of the cutting edge and the quality of the entire surface. A grinding spindle with 6 grinding shafts can be installed with up to 12 grinding wheels at a time, which is a small grinding wheel library. At the same time, the high-speed spindle with internal cooling can achieve a speed of up to 30000r/min.
In the processing of PCD tools of Ryoko Co., Japan, the spindles are guaranteed with high precision and reliability, whether it is high-speed grinding or creep grinding. Considering that during the grinding process, the surface of the grinding wheel is often passivated because it is blocked, so the LGMAZK machine is equipped with a dressing and resharpening device, combined with the control of the program, and the grinding wheel is sharpened in time to keep the grinding wheel in place. The sharp state, which shortens the entire processing cycle, ultimately improves the processing efficiency. LGMAZAK and MAZAK have accumulated a lot of commonality in the long-term commitment to the grinding of PCD tools, in addition to their different processing methods to adapt to a variety of different applications. Because they know that in the processing of PCD tools, the design and accuracy of the machine itself is also a guarantee of the final tool quality.
Because of the difficult machining and wear resistance of PCD materials, the rigidity of the machine is particularly important under strong grinding loads. The bed with concrete structure and the patented gantry frame structure make the load capacity and rigidity of the machine tool to the extreme. Directly driven shafts greatly enhance the entire grinding process and ultimately improve grinding efficiency. The workpiece clamping shaft with the electronic shaft has a structure that avoids the wear of the mechanical parts and reduces the generation of the gap, and provides extremely high rotation precision. Grinding is performed in a single clamping process to ensure that the circumferential runout of the tool is less than 5μm. The online measurement function provided by LGMAZAK machine tool can better ensure the precision control of the tool during machining. When processing PCD material, it often finds the micro-cracking phenomenon caused by improper control of the grinding force, so online measurement is adopted. The function can detect defects in time and guarantee the processing quality under the condition of one clamping. PCD tools can only be used to ensure the quality of the tool by using suitable equipment and a reasonable sharpening method. Only by comprehensively considering the factors involved in the manufacturing and grinding process can high-quality tools be obtained and finally Reduce the cost of using the tool and ultimately improve the quality of the overall tool. On this development path, LGMAZAK and MAZAK will make unremitting efforts and combine the actual needs of the market to provide more and better solutions and equipment for tool grinding.
Fermator Elevator Door Parts, Fermator Lift Door Parts
Fermator Group is the largest mono-product manufacturer of automatic doors for lifts in the world. Fermator doors are installed worldwide for light, medium and heavy traffic duty lifts, for domestic use, offices, airports, hotels and public buildings.
Year after year major investment has been made within the Group in order to increase production capacity, improve quality standards and provide the highest level of service to all our customers in more than 90 countries.
With headquarters in Spain and production plants located in France, Italy, Poland, Greece, India, China and Brazil, the Fermator Group responds effectively to the demands of all markets requiring automatic doors for lifts resulting in a major worldwide market share.
The automatic doors manufactured by Fermator comply with International Standards; EN 81-1/2, ASME A17.1-2000, and fire requirements EN 81-58 and UL 10B among numerous others.
Fermator Elevator Door Parts, Fermator Lift Door Parts
CEP Elevator Products ( China ) Co., Ltd. , https://www.zjelevatordoorsystem.com