Abstract: Hangji Group has recently won the 2010 Hangzhou Science and Technology Progress Award for the MKB7025 high-speed railway track plate special CNC grinding machine. This product is the main product of Hangzhou Machine with rotor groove grinding machine and CNC powerful forming grinding machine.
Hangji Group recently won the 2010 Hangzhou Science and Technology Progress Award for the MKB7025 high-speed railway track plate special CNC grinding machine. This product is the main product of Hang Machine with rotor groove grinding machine and CNC powerful forming grinding machine.
As one of the hallmarks of the revolutionary transformation of the world's construction machinery industry, hydraulic mechanical transmission instead of mechanical transmission is called subversive technology.
However, the industry once described the current situation of China's hydraulic parts industry - the darkness before dawn. For a long time, there are two recognized technical problems in the domestic hydraulic parts industry: one is the rotor groove processing of the vane pump and the other, and the other is the cycloidal wheel machining. The processing of these two workpieces has become a production bottleneck in the hydraulic parts industry, which has restricted the development of production.
However, Zhejiang Hangzhou Machine Tool Group Co., Ltd. (hereinafter referred to as Hangji Group) has successfully developed a series of CNC slow-feeding and powerful forming grinding machines, which seems to be expected to break the darkness of the hydraulic parts industry before dawn.
In recent years, Hangji Group has continuously invested in the development of CNC slow-feeding to powerful forming grinding machines, actively researching the grinding process and solving the grinding problems of rotor grooves and cycloidal wheels. At present, the high-efficiency processing machine tool provided by it has been applied to actual production, and has been well received and welcomed by the hydraulic parts industry.
The first breakthrough In the hydraulic parts industry, many pump products, especially vane pumps, blade oil motors, rotors and stators are the most important components, in the processing of these parts, especially the grinding of the rotor groove is the most critical. Because the accuracy of the rotor groove has a great influence on the pump, the vane pump rotor has high geometric accuracy and dimensional accuracy. In addition, the dimensional accuracy, shape tolerance and surface roughness of the parts are required to be strict, and the processing difficulty is also high. The blade oil pump is an important hydraulic component, and its quality improvement is critical to the technological advancement of the hydraulic parts industry. In the machining of the rotor, the core technology is the grinding of the notches.
Although the domestic grinding machine industry manufacturers can also manufacture rotor groove special grinding machines in batches, at the same time, in recent years, some machine tool factories that manufacture such equipment have emerged in China, which can meet the general needs of users in the hydraulic parts industry. However, compared with the advanced level in foreign countries, the domestic rotary groove special grinding machine can not meet the needs of users in terms of processing precision, consistency of precision, production efficiency, and humanization of operation. Therefore, in some manufacturers of hydraulic parts industry, the grinding machine for rotor groove finishing still depends on imported machine tools, such as BLOHM, Maegerle and YASDA of internationally renowned brands of Schleifring Grinder Group, especially the Swiss Maegerle grinding machine. the company.
In recent years, with the advancement of technology, the hydraulic parts industry has become more and more strict with the requirements of rotor groove precision, surface roughness and processing efficiency, and the application of large-size rotors has gradually increased. For example, the hydraulic motor that is urgently needed in the domestic shipbuilding industry requires grinding of large rotors, and the requirements for rotor diameter, thickness, surface hardness and tolerance are all high. However, the existing domestic equipment can no longer meet the needs, especially the lack of a forming grinder for large-size rotor slots.
As the largest production base of CNC powerful forming grinding machines in China, Hangji Group has carried forward the spirit of technological innovation in recent years, relying on the know-how accumulated in the field of forming grinding, with the help of increasingly mature CNC technology, indexing technology and CBN advanced abrasives. We are actively developing a new generation of grinding machines for high-end users in the hydraulic parts industry to process high-precision, large-size rotor grooves.
In February 2008, the first MKL7132×8/5 CNC rotor slot powerful forming grinding machine was supplied to Ningbo Hengtong Technology Co., Ltd., which is a professional manufacturer of rotors and stators for marine hydraulic motors. It is in good condition. In May 2009, a rotor grinding machine MKL7150×10/6 with a larger specification and higher technical content was manufactured for a marine machinery company in Wuhan. The company is a professional manufacturer of large ship winches and lifting mechanisms. The large rotors used in the production of large hydraulic motors have always been imported from Japan. They are not only costly, but also have poor resistance to risks and many restrictions. The successful development of this machine tool has helped users realize the localization of large rotor production.
Compared with domestic similar rotor groove grinding machines, the above two machine tools have great innovation in structure. The machine tool is equipped with a special rigid fixture that can withstand large-size rotors, with reliable positioning and exquisite design. Compared with MKL7132×8/5, MKL7150×10/6 CNC rotor groove grinder also adds a technologically innovative per-slot positioning mechanism to precisely position each groove before grinding. In addition to the machine's own technology, the CBN grinding wheel, which is essential for rotor groove grinding, is used for grinding, which greatly reduces the effect of wheel shedding on the rotor groove width.
In recent years, the domestic CBN grinding wheel manufacturing technology has become more and more mature. The machine tool uses the low-cost domestic CBN grinding wheel to meet the requirements of high-precision rotor groove grinding. This is also important because the user can afford it economically. At the same time, the CBN grinding wheel can be trimmed and 80 rotors can be ground once. In the case where the unilateral grinding allowance is 0.3 mm, the grinding speed reaches 80 mm/min. Each grinding wheel can process hundreds of rotors, which is close to the advanced level in foreign countries. It is reported that the MKL7150×10/6 CNC rotor groove grinding machine has been in normal full-load production since its delivery, and all types of rotor grooves can be completed on this machine. The production efficiency is better than that of domestic similar machine tools, reaching the level of similar foreign machine tools.
Another difficulty Based on the development of the rotor groove grinding machine, the users of the hydraulic parts industry are increasingly trusting the products of Hangji Group, but the Hangji Group has not stopped here, and they feel the same for the needs of users.
In hydraulic motor products, the cycloidal wheel is a key component, and its machining accuracy directly affects the performance of the entire mechanism. For a long time, due to the lack of CNC powerful forming grinding equipment in China, most of the processing of the profile of the cycloidal gear is realized by means of gear shaping machine, slow wire cutting and milling milling. Due to the complex shape of the cycloidal tooth profile, It is difficult to process and manufacture. Due to the low efficiency, low precision and poor tooth surface roughness of the above processing methods, it can not meet the requirements of mass production, directly affecting the performance of the reducer and hydraulic motor and pump.
With the rapid development of the mechanical processing industry, high-speed, heavy-cut, high-precision processing technology has gradually replaced conventional processing methods. The surface of the cycloidal gear with special profile requirements is finished, and the numerical control forming grinding technology is widely used in foreign countries. This grinding method has obvious superiority compared with the forming method of the cycloidal grinding. The processing method utilizes a numerically controlled powerful forming grinding machine, and uses a forming grinding wheel dressing technology to trim the shape of the single tooth profile of the cycloidal wheel, and then performs a powerful slow-feeding shaping grinding on the cycloidal workpiece through the rotary indexing mechanism to achieve direct forming teeth. Profile. It has the characteristics of high efficiency, high precision and good surface roughness. Because the numerical control can be used to realize the management mode of one person and multiple machines, it can meet the demand of mass production and improve the performance of the product.
For the processing problem of the cycloidal wheel, Hangji Group successfully developed the MKL7132×8 CNC powerful forming grinding machine which can be used for cycloidal grinding. The machine tool adopts imported diamond roller and is equipped with a high-rigidity roller dresser, which makes the tooth surface of the dressing wheel efficient and precise, and has a reliable guarantee for the tooth surface meshing degree and the grinding efficiency. At the same time, the machine tool is equipped with an automatic balance grinding wheel device, which can effectively remove the unbalance of the grinding wheel caused by the grinding wheel itself and after trimming, and improve the surface quality while improving the grinding precision. It can also realize the automatic compensation of the dressing amount of the grinding wheel, maintain the consistency of the workpiece processing size, and improve the processing precision and interchangeability. Both the grinding head spindle and the roller spindle adopt a low-pressure oil mist sealing device with independent intellectual property rights to prevent high-pressure coolant from entering the spindle system, which effectively ensures the spindle precision and the long bearing life. The grinding head body uses a heat balance device to control the thermal elongation of the main shaft to ensure the lateral grinding precision. The degree of automation and reliability of the machine tool is high. During the grinding process, except for the loading and unloading and measurement of the workpiece, the period is automatically completed, which improves the production efficiency and reduces the labor intensity of the operator.
The MKL7132×8 CNC powerful forming grinding machine has been widely welcomed by domestic hydraulic parts manufacturers. Time and time again, the Hangzhou Machine Group has received good economic benefits, and it has provided excellent equipment for the technical upgrading of the domestic hydraulic parts industry.
In the eyes of Hangji people, the fame and fortune of money is nothing but the cloud, and the pride of revitalizing the national industry from the bottom of the heart is the soul of the enterprise of Hangji Group.
Hangji Group recently won the 2010 Hangzhou Science and Technology Progress Award for the MKB7025 high-speed railway track plate special CNC grinding machine. This product is the main product of Hang Machine with rotor groove grinding machine and CNC powerful forming grinding machine.
As one of the hallmarks of the revolutionary transformation of the world's construction machinery industry, hydraulic mechanical transmission instead of mechanical transmission is called subversive technology.
However, the industry once described the current situation of China's hydraulic parts industry - the darkness before dawn. For a long time, there are two recognized technical problems in the domestic hydraulic parts industry: one is the rotor groove processing of the vane pump and the other, and the other is the cycloidal wheel machining. The processing of these two workpieces has become a production bottleneck in the hydraulic parts industry, which has restricted the development of production.
However, Zhejiang Hangzhou Machine Tool Group Co., Ltd. (hereinafter referred to as Hangji Group) has successfully developed a series of CNC slow-feeding and powerful forming grinding machines, which seems to be expected to break the darkness of the hydraulic parts industry before dawn.
In recent years, Hangji Group has continuously invested in the development of CNC slow-feeding to powerful forming grinding machines, actively researching the grinding process and solving the grinding problems of rotor grooves and cycloidal wheels. At present, the high-efficiency processing machine tool provided by it has been applied to actual production, and has been well received and welcomed by the hydraulic parts industry.
The first breakthrough In the hydraulic parts industry, many pump products, especially vane pumps, blade oil motors, rotors and stators are the most important components, in the processing of these parts, especially the grinding of the rotor groove is the most critical. Because the accuracy of the rotor groove has a great influence on the pump, the vane pump rotor has high geometric accuracy and dimensional accuracy. In addition, the dimensional accuracy, shape tolerance and surface roughness of the parts are required to be strict, and the processing difficulty is also high. The blade oil pump is an important hydraulic component, and its quality improvement is critical to the technological advancement of the hydraulic parts industry. In the machining of the rotor, the core technology is the grinding of the notches.
Although the domestic grinding machine industry manufacturers can also manufacture rotor groove special grinding machines in batches, at the same time, in recent years, some machine tool factories that manufacture such equipment have emerged in China, which can meet the general needs of users in the hydraulic parts industry. However, compared with the advanced level in foreign countries, the domestic rotary groove special grinding machine can not meet the needs of users in terms of processing precision, consistency of precision, production efficiency, and humanization of operation. Therefore, in some manufacturers of hydraulic parts industry, the grinding machine for rotor groove finishing still depends on imported machine tools, such as BLOHM, Maegerle and YASDA of internationally renowned brands of Schleifring Grinder Group, especially the Swiss Maegerle grinding machine. the company.
In recent years, with the advancement of technology, the hydraulic parts industry has become more and more strict with the requirements of rotor groove precision, surface roughness and processing efficiency, and the application of large-size rotors has gradually increased. For example, the hydraulic motor that is urgently needed in the domestic shipbuilding industry requires grinding of large rotors, and the requirements for rotor diameter, thickness, surface hardness and tolerance are all high. However, the existing domestic equipment can no longer meet the needs, especially the lack of a forming grinder for large-size rotor slots.
As the largest production base of CNC powerful forming grinding machines in China, Hangji Group has carried forward the spirit of technological innovation in recent years, relying on the know-how accumulated in the field of forming grinding, with the help of increasingly mature CNC technology, indexing technology and CBN advanced abrasives. We are actively developing a new generation of grinding machines for high-end users in the hydraulic parts industry to process high-precision, large-size rotor grooves.
In February 2008, the first MKL7132×8/5 CNC rotor slot powerful forming grinding machine was supplied to Ningbo Hengtong Technology Co., Ltd., which is a professional manufacturer of rotors and stators for marine hydraulic motors. It is in good condition. In May 2009, a rotor grinding machine MKL7150×10/6 with a larger specification and higher technical content was manufactured for a marine machinery company in Wuhan. The company is a professional manufacturer of large ship winches and lifting mechanisms. The large rotors used in the production of large hydraulic motors have always been imported from Japan. They are not only costly, but also have poor resistance to risks and many restrictions. The successful development of this machine tool has helped users realize the localization of large rotor production.
Compared with domestic similar rotor groove grinding machines, the above two machine tools have great innovation in structure. The machine tool is equipped with a special rigid fixture that can withstand large-size rotors, with reliable positioning and exquisite design. Compared with MKL7132×8/5, MKL7150×10/6 CNC rotor groove grinder also adds a technologically innovative per-slot positioning mechanism to precisely position each groove before grinding. In addition to the machine's own technology, the CBN grinding wheel, which is essential for rotor groove grinding, is used for grinding, which greatly reduces the effect of wheel shedding on the rotor groove width.
In recent years, the domestic CBN grinding wheel manufacturing technology has become more and more mature. The machine tool uses the low-cost domestic CBN grinding wheel to meet the requirements of high-precision rotor groove grinding. This is also important because the user can afford it economically. At the same time, the CBN grinding wheel can be trimmed and 80 rotors can be ground once. In the case where the unilateral grinding allowance is 0.3 mm, the grinding speed reaches 80 mm/min. Each grinding wheel can process hundreds of rotors, which is close to the advanced level in foreign countries. It is reported that the MKL7150×10/6 CNC rotor groove grinding machine has been in normal full-load production since its delivery, and all types of rotor grooves can be completed on this machine. The production efficiency is better than that of domestic similar machine tools, reaching the level of similar foreign machine tools.
Another difficulty Based on the development of the rotor groove grinding machine, the users of the hydraulic parts industry are increasingly trusting the products of Hangji Group, but the Hangji Group has not stopped here, and they feel the same for the needs of users.
In hydraulic motor products, the cycloidal wheel is a key component, and its machining accuracy directly affects the performance of the entire mechanism. For a long time, due to the lack of CNC powerful forming grinding equipment in China, most of the processing of the profile of the cycloidal gear is realized by means of gear shaping machine, slow wire cutting and milling milling. Due to the complex shape of the cycloidal tooth profile, It is difficult to process and manufacture. Due to the low efficiency, low precision and poor tooth surface roughness of the above processing methods, it can not meet the requirements of mass production, directly affecting the performance of the reducer and hydraulic motor and pump.
With the rapid development of the mechanical processing industry, high-speed, heavy-cut, high-precision processing technology has gradually replaced conventional processing methods. The surface of the cycloidal gear with special profile requirements is finished, and the numerical control forming grinding technology is widely used in foreign countries. This grinding method has obvious superiority compared with the forming method of the cycloidal grinding. The processing method utilizes a numerically controlled powerful forming grinding machine, and uses a forming grinding wheel dressing technology to trim the shape of the single tooth profile of the cycloidal wheel, and then performs a powerful slow-feeding shaping grinding on the cycloidal workpiece through the rotary indexing mechanism to achieve direct forming teeth. Profile. It has the characteristics of high efficiency, high precision and good surface roughness. Because the numerical control can be used to realize the management mode of one person and multiple machines, it can meet the demand of mass production and improve the performance of the product.
For the processing problem of the cycloidal wheel, Hangji Group successfully developed the MKL7132×8 CNC powerful forming grinding machine which can be used for cycloidal grinding. The machine tool adopts imported diamond roller and is equipped with a high-rigidity roller dresser, which makes the tooth surface of the dressing wheel efficient and precise, and has a reliable guarantee for the tooth surface meshing degree and the grinding efficiency. At the same time, the machine tool is equipped with an automatic balance grinding wheel device, which can effectively remove the unbalance of the grinding wheel caused by the grinding wheel itself and after trimming, and improve the surface quality while improving the grinding precision. It can also realize the automatic compensation of the dressing amount of the grinding wheel, maintain the consistency of the workpiece processing size, and improve the processing precision and interchangeability. Both the grinding head spindle and the roller spindle adopt a low-pressure oil mist sealing device with independent intellectual property rights to prevent high-pressure coolant from entering the spindle system, which effectively ensures the spindle precision and the long bearing life. The grinding head body uses a heat balance device to control the thermal elongation of the main shaft to ensure the lateral grinding precision. The degree of automation and reliability of the machine tool is high. During the grinding process, except for the loading and unloading and measurement of the workpiece, the period is automatically completed, which improves the production efficiency and reduces the labor intensity of the operator.
The MKL7132×8 CNC powerful forming grinding machine has been widely welcomed by domestic hydraulic parts manufacturers. Time and time again, the Hangzhou Machine Group has received good economic benefits, and it has provided excellent equipment for the technical upgrading of the domestic hydraulic parts industry.
In the eyes of Hangji people, the fame and fortune of money is nothing but the cloud, and the pride of revitalizing the national industry from the bottom of the heart is the soul of the enterprise of Hangji Group.
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