Numerical control gear grinding machine tool based on gear machining

Abstract

The invention belongs to the field of gear grinding machine tools, and particularly relates to a numerical control gear grinding machine tool based on gear machining, which comprises a driving base, the top output end of the driving base is fixedly connected with a rotary table capable of rotating, and the top of the rotary table is provided with a lock disc for fixing a machining gear. Vertically-arranged side sealing covers are fixedly connected to the two sides of the driving base correspondingly, a gear grinding table capable of conducting lifting translation is arranged on the outer side of the rotating table, through the arrangement, the clamping and discharging process of a large machining gear becomes convenient and safe through cooperation of a supporting frame and a connecting ring, butt joint can be completed on the outer side of equipment, and the machining efficiency of the large machining gear is improved. The problems of shaking, collision and the like caused by the fact that a large-mass machining gear enters a narrow machine tool in the traditional suspension clamping process are solved; and meanwhile, the left connecting ring can also play a role in monitoring and emergency treatment in the machining process, and the problem that the whole high-cost machining gear is scrapped due to timely operation errors of a machine tool is solved.

Description

Technical Field

[0001] This invention belongs to the field of gear grinding machine tools, specifically a CNC gear grinding machine tool based on gear machining. Background Technology

[0002] Gear grinding machine is a machine tool that uses a grinding wheel to finish gears after heat treatment. It is mainly used to eliminate gear deformation after heat treatment. Its working principle is mainly divided into two categories: forming method and generating method. The forming method uses a grinding wheel with a well-trimmed profile to directly grind the tooth groove; the generating method generates involute tooth shape through the meshing motion of the grinding wheel and the gear. Form grinding is a process that uses a form grinding wheel to finish gears. Before grinding, the grinding wheel is dressed to fit the tooth groove of the workpiece. During grinding, the grinding wheel only needs to make a feed motion along the tooth groove direction to grind the entire tooth shape in one go, without the need for complex generating rotation of the workpiece.

[0003] Traditional gear grinding machines require the use of cranes and other equipment to clamp the gears into the machine when machining large, high-cost gears. However, the internal space of the machine is limited, and the large gears are prone to shaking during the hoisting process, making clamping difficult and causing collisions that can damage the equipment. At the same time, if an operational error occurs during the gear grinding process, resulting in burns or cracks, the entire gear can be rendered unusable, resulting in significant losses.

[0004] Therefore, the present invention provides a CNC gear grinding machine tool based on gear machining. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A CNC gear grinding machine tool based on gear processing according to the present invention includes a drive base, a rotatable rotary table fixedly connected to the top output end of the drive base, a locking disc for fixing the processed gear installed on the top of the rotary table, vertically arranged side covers fixedly connected to both sides of the drive base, a gear grinding table capable of lifting and translating is arranged on the outer side of the rotary table, a vertically arranged grinding wheel is installed at the drive end of the gear grinding table, an infrared detector for detecting the temperature of the processed gear is installed in the gear grinding table, a power table is installed at the front end of the drive base, a support frame is installed at the rotating end of the power table, a connecting ring for locking the processed gear and connecting to the support frame is arranged on the outer side of the processed gear, and an electric heater for heating the processed gear is installed on the outer edge of the connecting ring; During gear grinding, an infrared detector captures infrared radiation at the grinding point and converts it into a temperature signal, ensuring the processing temperature remains within a suitable range. Excessive unidirectional feed or poor grinding wheel condition can easily lead to overheating, causing burns and cracks. In the machining of large, high-quality gears, if burns and cracks occur due to operational errors, the damaged area is in a highly unstable and tense state due to the temperature difference between high and low temperatures. If not addressed promptly, the burns and cracks will spread into the gear's interior. When the spread is deep, the gear loses its reusability, resulting in significant losses. The transfer of large gears is already time-consuming; by the time they are transferred to specialized repair equipment, the damage has worsened, rendering the gear irreparable. By using a heater, when the infrared detector detects abnormal temperatures at the grinding point, indicating burns and cracks, the grinding table is moved away from the gear, and the heater in the connecting ring is activated to temper the burned area of ​​the gear. The temperature of the processed gear is maintained between 180 and 200 degrees Celsius. At this temperature, the elongated crystal lattice is restored to its normal position, the internal tensile stress is released, and the driving force for tensile cracking is lost. At the same time, the carbon atoms in the martensite produced by the burn precipitate out as fine carbides, transforming into tempered martensite with better toughness, reducing the extension of burns and cracks. After holding at this temperature for about 20 minutes, the processed gear is allowed to cool down slowly. During this time, the processed gear will not be further damaged, thus allowing sufficient time to transfer the processed gear to the repair equipment for repair methods such as laser cladding, reducing losses. This setup not only makes the clamping and unloading process of large processed gears convenient and safe by utilizing the cooperation of the support frame and connecting ring, but also allows docking to be completed outside the equipment, reducing the shaking and collision problems caused by large processed gears entering the narrow machine tool in the traditional suspension clamping process. At the same time, the remaining connecting ring can also play a role in monitoring and emergency handling during the processing, reducing the problem of scrapping the entire high-cost processed gear due to momentary machine tool operation errors.

[0007] Preferably, there are two grinding tables, symmetrically distributed on both sides of the rotary table. Two cooling pipes for spraying coolant are installed at the front end of each grinding table. By setting up two grinding tables, grinding can be performed simultaneously on both sides of the gear, halving the processing time. Since the processing steps and intensity are identical on both grinding tables, the resulting processing temperatures should also be the same. If the detected temperatures differ, it indicates a processing problem. By comparing the processing temperatures, it is possible to quickly determine if there is a processing error. Furthermore, the grinding wheel in one grinding table can be accelerated or decelerated individually to measure the impact of rotational speed on processing temperature and efficiency, while the other table remains constant for recording more accurate and complex data. During processing, coolant is sprayed using the cooling pipes to maintain a safe processing temperature. It should be noted that this method can only be used to process gears with an even number of teeth. When processing gears with an odd number of teeth, only one grinding table can be used.

[0008] Preferably, the front end of the grinding table protrudes upwards, and the infrared detector is vertically fixed to the protruding part. Vertical air guns are fixed to both sides of the infrared detector. A wear detector is installed near the bottom of the front end of the grinding table. The infrared temperature at the grinding point is accurately received by the vertical infrared detector. Since the coolant is continuously sprayed, in order to reduce the influence of the liquid on the detection, high-pressure airflow can be periodically sprayed downwards with air guns during the detection process to disperse the coolant. The most accurate temperature data can be captured instantly without affecting the cooling process of the coolant. The wear detector can be a laser phase difference type or a visual inspection type to detect the shape of the grinding wheel and determine the degree of wear.

[0009] Preferably, the top surface of the connecting ring has multiple adjustment holes penetrating its bottom. A clamping ring is placed below the processed gear. The connecting ring is fixed to the clamping ring by a locking rod. A locking bolt adapted to the adjustment holes is fixed to the surface of the support frame. When the processed gear is outside the equipment, the connecting ring is first placed on top of the processed gear, and the clamping ring is placed at the bottom of the processed gear. The locking bolt is then threaded through the adjustment hole and the hole on the surface of the processed gear and connected to the clamping ring. The top of the locking bolt is then fixed with a nut, thereby fixing the connecting ring and the clamping ring to the outside of the processed gear. After that, the processed gear is flipped over so that the connecting ring is at the bottom and fixed to the support frame. This completes the stable flipping of the processed gear, allowing the hoisting and moving process of the processed gear to be carried out outside the machine tool. This not only increases the operating space but also greatly reduces the problem of the processed gear shaking and hitting the machine tool during hoisting.

[0010] Preferably, the locking disc is composed of multiple outwardly expanding sector-shaped discs. A positioning post is fixed to the top of each sector-shaped disc. A vertically arranged back plate is fixed to the rear end of the drive base. A top plate is fixed to the top of the back plate and the side cover. A recovery valve is installed on the top surface of the drive base. When the processing gear is fixed on the locking disc, the multiple sector-shaped discs expand outward synchronously, allowing the positioning post to fit against the inner ring of the processing gear, completing the positioning process and ensuring the stable operation of subsequent processing. The coolant used in the processing is recovered through the recovery valve.

[0011] Preferably, an adding ring is installed on the outer side of the connecting ring. The top surface of the adding ring and the side of the connecting ring have interconnected mating holes. A traction device is fixed to the back plate. A steel cable connects the traction device and the adding ring. When the connecting ring is fixed, the adding ring can be fixed on the outer side, and bolts or other components are inserted into the mating holes to complete the stable connection between the two. Then, the steel cable at the end of the traction device is connected to the outer side of the adding ring. During the rotation of the support frame, the winding device in the traction device can wind up the steel cable to assist in the stable rotation of the gear. The outer diameter of the adding ring is large, which can ensure that the steel cable does not contact the gear during the entire winding process. During the gear grinding process, the adding ring is disassembled, so as not to obstruct the processing flow of the grinding wheel and the gear.

[0012] Preferably, there are three traction devices, with the two traction devices on both sides being inclined. Multiple outwardly protruding traction platforms are fixed to the outer side of the adding ring. A collar is fixed to the end of the steel cable. There is a notch at the end of the traction platform, in which a roller is installed. The collar is fitted into the roller. This prevents the steel cable from twisting due to changes in the angle of the processing gear during traction. Furthermore, when the support frame rotates close to the locking disc, the direction of the force changes. At this point, the steel cable is at its shortest length, and the support frame needs to pull the downward-moving processing gear. The steel cable is then slowly released rather than wound up, ensuring that the pressure on the support frame is not excessive when the force changes direction, thus guaranteeing a stable clamping process for the processing gear. Three traction devices can further improve the traction effect, and the number can be increased to accommodate processing gears of greater weight.

[0013] Preferably, the electric heater includes an electric heating module and a fan module. The electric heating module is located inside the connecting ring, and multiple air outlets are opened on the outside of the connecting ring. The air outlets are inclined downwards. When it is necessary to heat up the gear for tempering, the electric heating module built into the connecting ring heats up, and the fan module blows out the heat and covers the damaged area of ​​the gear. The temperature of 200 degrees Celsius will not damage the quality of the gear, but it can effectively release the stress generated by burns and cracks, greatly reducing the problem of the damage continuing to expand and causing the gear to become completely unusable.

[0014] Preferably, an electric heating pad is fixed to the outer edge of the clamping ring. The electric heating pad is attached to the gear being processed. Multiple electric heating pads are arranged in a ring at equal intervals. When the upper electric heater is heating, the bottom electric heating pad transfers heat to the bottom of the gear being processed through contact heat transfer, covering the weaker parts covered by the electric heater, ensuring that the damaged parts are heated evenly, and allowing the constant temperature tempering process to proceed smoothly.

[0015] Preferably, the top of the positioning column is provided with a plug valve, and multiple transmission lines are fixedly connected to the middle of the connecting ring. The ends of the transmission lines are fixedly connected with waterproof plugs that are compatible with the plug valve. The transmission lines are connected to the positioning column to complete the power transmission and ensure that the electric heating equipment can work in an orderly manner.

[0016] The beneficial effects of this invention are as follows: 1. The CNC gear grinding machine tool based on gear machining described in this invention, through the setting of support frame and connecting ring, not only makes the clamping and unloading process of large machined gears more convenient and safe by utilizing the cooperation of support frame and connecting ring, but also allows docking to be completed outside the equipment, reducing the shaking and collision problems caused by large mass machined gears entering the narrow machine tool in the traditional suspension clamping process; at the same time, the remaining connecting ring can also play a role in monitoring and emergency handling during the machining process, reducing the problem of scrapping the entire high-cost machined gear due to momentary machine tool operation errors.

[0017] 2. The CNC gear grinding machine tool based on gear machining described in this invention, by setting two grinding tables, can perform gear grinding work simultaneously on both sides of the gear, shortening the processing time by half. Since the processing steps and intensity of the two grinding tables are exactly the same, the resulting processing temperatures should also be the same. When the detected temperatures are different, it proves that there is a problem in the processing. By comparing the processing temperatures, it is possible to quickly determine whether there is a processing error. It is also possible to accelerate or decelerate the grinding wheel in one grinding table to measure the influence of the rotational speed on the processing temperature and efficiency, while keeping the other table unchanged, for recording more accurate and complex data. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a diagram showing the state of the gear being machined and clamped to the rotary table according to the present invention; Figure 3 This is a diagram showing the state of the gears after they have been disassembled and transported out according to the present invention. Figure 4 This is a perspective view of the gears and support frame manufactured according to the present invention; Figure 5 This is a perspective view of the gears and connecting rings processed according to the present invention; Figure 6 This is a perspective view of the gear processing and ring addition of the present invention; Figure 7 This is a perspective view of the grinding table of the present invention; In the diagram: 1. Drive base; 2. Side cover; 3. Top plate; 4. Power platform; 5. Grinding table; 6. Back plate; 7. Rotary table; 8. Recovery valve; 9. Support frame; 10. Tractor; 11. Steel cable; 12. Locking disc; 13. Positioning pin; 14. Machining gear; 15. Locking bolt; 16. Connecting ring; 17. Adding ring; 18. Traction table; 19. Clamping ring; 21. Heating pad; 22. Locking rod; 23. Transmission line; 24. Docking hole; 25. Heater; 26. Adjustment hole; 27. Grinding wheel; 28. Infrared detector; 29. ​​Air gun; 31. Cooling pipe; 32. Wear detector. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 7 As shown in the embodiment of the present invention, a CNC gear grinding machine tool based on gear machining includes a drive base 1. A rotatable rotary table 7 is fixedly connected to the top output end of the drive base 1. A locking disc 12 for fixing the machining gear 14 is installed on the top of the rotary table 7. Vertically arranged side covers 2 are fixedly connected to both sides of the drive base 1. A grinding table 5 capable of lifting and translating is arranged on the outer side of the rotary table 7. A vertically arranged grinding wheel 27 is installed on the drive end of the grinding table 5. An infrared detector 28 for detecting the temperature of the machining gear 14 is installed in the grinding table 5. A power table 4 is installed at the front end of the drive base 1. A support frame 9 is installed on the rotating end of the power table 4. A connecting ring 16 for locking the machining gear 14 and connecting to the support frame 9 is arranged on the outer side of the machining gear 14. An electric heater 25 for heating the machining gear 14 is installed on the outer edge of the connecting ring 16. The power table 4 controls the support frame 9 to rotate outward until the support frame 9 is in a horizontal state. Additional supports can be set below the support frame 9. The connecting ring 16 is fixed to the top of the machining gear 14. After flipping, the machining gear 14 is placed on top of the support frame 9 and temporarily fixed to the support frame 9. Then, the power table 4 controls the entire support frame 9 and the machining gear 14 to rotate inward, rotating the machining gear 14 to above the locking disc 12. The locking disc 12 can expand and contract, fixing the machining gear 14 from the inner ring. The fixing of the support frame 9 to the connecting ring 16 is released, and the support frame 9 is rotated to a vertical state, forming an inner and outer partition for protection. Before the gear grinding process begins, the rotating table 7 drives the locking disc 12 and the machining gear 14 to rotate. The grinding table 5 is equipped with an optical monitoring module to assist in adjusting the position of the gear 14. The grinding wheel 27 is started to rotate, and the grinding table 5 is controlled to move closer to the gear 14. Grinding is completed through the contact friction between the grinding wheel 27 and the gear 14. The grinding process is as follows: First, the rotating grinding wheel 27 contacts and rubs against the gear 14 from above, while the entire grinding table 5 and the grinding wheel 27 are controlled to move downward to complete the grinding work on one side of the gear 14. Then, the grinding table 5 is moved back, and the gear 14 is rotated at a certain angle by the rotary table 7 to change the contact surface between the gear 14 and the grinding wheel 27. Then, the grinding wheel 27 is controlled to contact and rub against the gear 14 again. Repeating the operation can complete the entire grinding work. During gear grinding, infrared detector 28 captures infrared radiation at the grinding point and converts it into a temperature signal, ensuring the processing temperature remains within a suitable range. When the unidirectional feed rate is too high, or the grinding wheel 27 is in poor condition, the grinding temperature can easily become too high, causing burns and cracks. In the machining of large, high-quality gears, if burns and cracks occur due to operational errors, the damaged area of ​​the gear 14 is in an extremely unstable and tense state due to the temperature difference between high and low temperatures. If not addressed promptly, the burns and cracks will... The damage spreads into the gear's interior. When the damage becomes deep enough, the machined gear 14 loses its reusability, resulting in significant losses. The transfer of large gears is already time-consuming; by the time it reaches the specialized repair equipment, the damage has worsened, rendering the gear irreparable. Through the installation of the heater 25, when the infrared detector 28 detects abnormal temperatures at the grinding area, indicating burns and cracks, the grinding table 5 is moved away from the machined gear 14, and the heater 25 in the connecting ring 16 is activated to temper the burned areas of the machined gear 14. The temperature of the machined gear 14 is maintained between 180 and 200 degrees Celsius. At this temperature, the elongated crystal lattice is restored to its normal position, the internal tensile stress is released, and the driving force for tensile cracking is lost. At the same time, the carbon atoms in the martensite produced by the burn precipitate out as fine carbides, transforming into tempered martensite with better toughness, reducing the extension of burns and cracks. After holding at this temperature for about 20 minutes, the machined gear 14 is slowly cooled. During this time, the machined gear 14 will not be further damaged, thus allowing sufficient time to transfer the machined gear 14 to the repair equipment. Repair methods such as laser cladding can be used to reduce losses. This setup not only makes the clamping and unloading process of large machined gears 14 more convenient and safe by utilizing the cooperation of the support frame 9 and the connecting ring 16, allowing docking to be completed outside the equipment, but also reduces the shaking and collision problems caused by the large mass of the machined gears 14 entering the narrow machine tool in the traditional suspension clamping process. At the same time, the remaining connecting ring 16 can also play a role in monitoring and emergency handling during the processing, reducing the problem of scrapping the entire high-cost machined gears 14 due to momentary machine tool operation errors.

[0022] There are two grinding tables 5, which are symmetrically distributed on both sides of the rotary table 7. Two cooling pipes 31 for spraying coolant are installed at the front end of each grinding table 5. During operation, by setting up two grinding tables 5, grinding can be performed simultaneously on both sides of the gear 14, halving the processing time. Since the processing steps and intensity are identical on both grinding tables 5, the resulting processing temperatures should also be the same. If the detected temperatures differ, it indicates a processing problem. By comparing processing temperatures, it is possible to quickly identify any processing errors. Furthermore, the grinding wheel 27 in one grinding table 5 can be accelerated or decelerated individually to measure the impact of rotational speed on processing temperature and efficiency, while the other table remains constant for recording more accurate and complex data. During processing, coolant is sprayed using cooling pipe 31 to maintain a safe processing temperature. It is important to note that this method can only be used to process gears with an even number of teeth. When processing gears with an odd number of teeth, only one grinding table 5 can be used.

[0023] The front end of the grinding table 5 protrudes upwards, and the infrared detector 28 is vertically fixed to the protruding part. Vertical air guns 29 are fixed to both sides of the infrared detector 28. A wear detector 32 is installed at the bottom of the front end of the grinding table 5. During operation, the infrared temperature at the grinding wheel is accurately received by the vertical infrared detector 28. Since the coolant is continuously sprayed, in order to reduce the influence of the liquid on the detection, the air gun 29 can be used periodically to spray high-pressure air downwards to disperse the coolant. The most accurate temperature data can be captured instantly without affecting the cooling process of the coolant. The wear detector 32 can be a laser phase difference type or a visual inspection type to detect the shape of the grinding wheel 27 and determine the degree of wear.

[0024] The top surface of the connecting ring 16 is provided with a plurality of adjustment holes 26 penetrating its bottom. A clamping ring 19 is placed below the machining gear 14. The connecting ring 16 is fixedly connected to the clamping ring 19 by a locking rod 22. A locking bolt 15 adapted to the adjustment holes 26 is fixedly connected to the surface of the support frame 9. During operation, when the gear 14 is outside the machine, first place the connecting ring 16 on top of the gear 14 and the clamping ring 19 on the bottom of the gear 14. Then, use the locking bolt 15 to pass through the adjusting hole 26 and the hole on the surface of the gear 14 and thread it onto the clamping ring 19. Finally, use a nut to fix the top of the locking bolt 15, thereby fixing the connecting ring 16 and the clamping ring 19 to the outside of the gear 14. After that, flip the gear 14 so that the connecting ring 16 is at the bottom and fixed to the support frame 9. This completes the stable flipping of the gear 14, allowing the hoisting and moving process of the gear 14 to be carried out outside the machine tool. This not only increases the operating space but also greatly reduces the problem of the gear 14 shaking and hitting the machine tool during hoisting.

[0025] The locking disc 12 is composed of multiple outwardly expanding fan-shaped discs. A positioning post 13 is fixedly connected to the top of the fan-shaped discs. A vertically arranged back plate 6 is fixedly connected to the rear end of the drive base 1. A top plate 3 is fixedly connected to the top of the back plate 6 and the side cover 2. A recovery valve 8 is installed on the top surface of the drive base 1. During operation, after the gear 14 is fixed on the locking disc 12, multiple sector discs expand outward synchronously, allowing the positioning pin 13 to fit the inner ring of the gear 14, completing the positioning process and ensuring the stable operation of subsequent processing; the coolant used in the processing is recovered through the recovery valve 8.

[0026] An adding ring 17 is installed on the outside of the connecting ring 16. The top surface of the adding ring 17 and the side surface of the connecting ring 16 are provided with interconnecting docking holes 24. A traction device 10 is fixedly connected to the back plate 6. A steel cable 11 is connected between the traction device 10 and the adding ring 17. During operation, when the connecting ring 16 is fixed, an additional ring 17 can be fixed on the outside, and bolts or other components are inserted into the docking hole 24 to complete the stable connection between the two. Then, the steel cable 11 at the end of the traction device 10 is connected to the outside of the additional ring 17. During the rotation of the support frame 9, the winding device in the traction device 10 can wind up the steel cable 11 to assist in the stable rotation of the gear 14. The outer diameter of the additional ring 17 is large, which can ensure that the steel cable 11 does not contact the gear 14 during the entire winding process. During the gear grinding process, the additional ring 17 is disassembled so as not to block the processing flow of the grinding wheel 27 and the gear 14.

[0027] The number of the traction devices 10 is three, and the traction devices 10 located on both sides are inclined. Multiple outwardly protruding traction platforms 18 are fixed to the outer side of the adding ring 17. During operation, a collar is fixed to the end of the steel cable 11, and a notch is present at the end of the traction table 18. A roller is installed in the notch, and the collar is fitted into the roller. This prevents the steel cable 11 from twisting due to changes in the angle of the processing gear 14 during traction. Furthermore, when the support frame 9 rotates close to the locking disc 12, the direction of the force changes. At this point, the steel cable 11 is in its shortest state, and the support frame 9 needs to pull the downward-moving processing gear 14. The steel cable 11 is then slowly released instead of retracted, ensuring that the pressure on the support frame 9 is not excessive when the direction of the force changes, thus guaranteeing the stable clamping process of the processing gear 14. The three traction devices 10 can further improve the traction effect, and their number can be increased to accommodate processing gears 14 with greater weight.

[0028] The electric heater 25 includes an electric heating module and a fan module. The electric heating module is disposed inside the connecting ring 16, and multiple air outlets are provided on the outer side of the connecting ring 16. The air outlets are inclined downwards. During operation, when the gear 14 needs to be heated for tempering, the electric heating module built into the connecting ring 16 heats it, and the fan module blows the heat out and covers the damaged area of ​​the gear 14. The temperature of 200 degrees Celsius will not damage the quality of the gear 14, but it can effectively release the stress generated by the burns and cracks, greatly reducing the problem of the damage continuing to expand and causing the gear 14 to become completely unusable.

[0029] The outer edge of the clamping ring 19 is fixed with an electric heating patch 21, which is in contact with the processing gear 14, and a plurality of the electric heating patches 21 are arranged in a ring at equal intervals. During operation, when the upper electric heater 25 is heating, the bottom electric heating pad 21 transfers heat to the bottom of the processed gear 14 through contact heat transfer, covering the weaker parts covered by the electric heater 25, ensuring that the damaged parts are heated evenly, and allowing the constant temperature tempering process to proceed smoothly.

[0030] The top of the positioning post 13 is provided with a plug valve, and multiple transmission lines 23 are fixedly connected to the middle of the connecting ring 16. The ends of the transmission lines 23 are fixedly connected with waterproof plugs that are compatible with the plug valve. During operation, the transmission line 23 is connected to the positioning post 13 to complete the power transmission and ensure that the electric heating equipment can work in an orderly manner.

[0031] During operation, the power table 4 controls the support frame 9 to rotate outward until it is horizontal. Additional supports can be placed below the support frame 9. The connecting ring 16 is fixed to the top of the machining gear 14. After flipping, the machining gear 14 is placed on top of the support frame 9 and temporarily fixed to it. Then, the power table 4 controls the entire support frame 9 and machining gear 14 to rotate inward, rotating the machining gear 14 above the locking disc 12. The locking disc 12 can expand and contract, fixing the machining gear 14 from the inner ring. The fixing of the support frame 9 to the connecting ring 16 is released, and the support frame 9 is rotated to a vertical position, forming an inner and outer partition for protection. Before the gear grinding begins, the rotating table 7 drives the locking disc 12 and machining gear 14 to... The grinding table 5 is equipped with an optical monitoring module to assist in adjusting the position of the gear 14. The grinding wheel 27 is started to rotate, and the grinding table 5 is controlled to move closer to the gear 14. Grinding is completed by the contact friction between the grinding wheel 27 and the gear 14. The grinding process is as follows: First, the rotating grinding wheel 27 contacts and rubs against the gear 14 from above, while the entire grinding table 5 and the grinding wheel 27 are controlled to move downward to complete the grinding work on one side of the gear 14. Then the grinding table 5 is moved back, and the gear 14 is rotated by a certain angle by the rotary table 7 to change the contact surface between the gear 14 and the grinding wheel 27. Then the grinding wheel 27 is controlled to contact and rub against the gear 14 again. Repeating the operation can complete the entire grinding work. During gear grinding, infrared detector 28 captures infrared radiation at the grinding point and converts it into a temperature signal, ensuring the processing temperature remains within a suitable range. When the unidirectional feed rate is too high, or the grinding wheel 27 is in poor condition, the grinding temperature can easily become too high, causing burns and cracks. In the machining of large, high-quality gears, if burns and cracks occur due to operational errors, the damaged area of ​​the gear 14 is in an extremely unstable and tense state due to the temperature difference between high and low temperatures. If not addressed promptly, the burns and cracks will... The damage spreads into the gear's interior. When the damage becomes deep enough, the machined gear 14 loses its reusability, resulting in significant losses. The transfer of large gears is already time-consuming; by the time it reaches the specialized repair equipment, the damage has worsened, rendering the gear irreparable. Through the installation of the heater 25, when the infrared detector 28 detects abnormal temperatures at the grinding area, indicating burns and cracks, the grinding table 5 is moved away from the machined gear 14, and the heater 25 in the connecting ring 16 is activated to temper the burned areas of the machined gear 14. The temperature of the machined gear 14 is maintained between 180 and 200 degrees Celsius. At this temperature, the elongated crystal lattice is restored to its normal position, the internal tensile stress is released, and the driving force for tensile cracking is lost. At the same time, the carbon atoms in the martensite produced by the burn precipitate out as fine carbides, transforming into tempered martensite with better toughness, reducing the extension of burns and cracks. After holding at this temperature for about 20 minutes, the machined gear 14 is slowly cooled. During this time, the machined gear 14 will not be further damaged, thus allowing sufficient time to transfer the machined gear 14 to the repair equipment. Repair methods such as laser cladding can be used to reduce losses. This setup not only makes the clamping and unloading process of large machined gears 14 more convenient and safe by utilizing the cooperation of the support frame 9 and the connecting ring 16, allowing docking to be completed outside the equipment, but also reduces the shaking and collision problems caused by the large mass of the machined gears 14 entering the narrow machine tool in the traditional suspension clamping process. At the same time, the remaining connecting ring 16 can also play a role in monitoring and emergency handling during the processing, reducing the problem of scrapping the entire high-cost machined gears 14 due to momentary machine tool operation errors.

[0032] By setting up two grinding tables 5, grinding can be performed simultaneously on both sides of the gear 14, halving the processing time. Since the processing steps and intensity are identical on both grinding tables 5, the resulting processing temperatures should also be the same. If the detected temperatures differ, it indicates a processing problem. By comparing processing temperatures, it's possible to quickly identify any processing errors. Furthermore, the grinding wheel 27 in one grinding table 5 can be accelerated or decelerated individually to measure the impact of rotational speed on processing temperature and efficiency, while the other table remains constant for recording more accurate and complex data. During processing, coolant is sprayed using cooling pipe 31 to maintain a safe processing temperature. It's important to note that this method can only be used to process gears with an even number of teeth. When processing gears with an odd number of teeth, only one grinding table 5 can be used.

[0033] The infrared temperature at the grinding wheel is accurately received by the vertical infrared detector 28. Since the coolant is continuously sprayed, in order to reduce the influence of the liquid on the detection, a high-pressure airflow can be periodically sprayed downward by the air gun 29 to disperse the coolant during the detection process. The most accurate temperature data can be captured instantly without affecting the cooling process of the coolant. The wear detector 32 can be a laser phase difference type or a visual inspection type to detect the shape of the grinding wheel 27 and determine the degree of wear.

[0034] When the gear 14 is outside the machine, first place the connecting ring 16 on top of the gear 14 and the clamping ring 19 on the bottom of the gear 14. Then, use the locking bolt 15 to pass through the adjusting hole 26 and the hole on the surface of the gear 14 and thread it to the clamping ring 19. Finally, use a nut to fix the top of the locking bolt 15, thereby fixing the connecting ring 16 and the clamping ring 19 to the outside of the gear 14. After that, flip the gear 14 so that the connecting ring 16 is at the bottom and fixed to the support frame 9. This will complete the stable flipping of the gear 14 and allow the hoisting and moving process of the gear 14 to be carried out outside the machine tool. This not only increases the operating space but also greatly reduces the problem of the gear 14 shaking and hitting the machine tool during hoisting.

[0035] After the gear 14 is fixed on the locking disc 12, multiple sector discs expand outward synchronously, allowing the positioning pin 13 to fit the inner ring of the gear 14, completing the positioning process and ensuring the stable operation of subsequent processing; the coolant used in the processing is recovered through the recovery valve 8.

[0036] When the connecting ring 16 is fixed, an additional ring 17 can be fixed on the outside, and bolts or other components are inserted into the docking hole 24 to complete the stable connection between the two. Then, the steel cable 11 at the end of the traction device 10 is connected to the outside of the additional ring 17. During the rotation of the support frame 9, the winding device in the traction device 10 can wind up the steel cable 11 to assist in the stable rotation of the gear 14. The outer diameter of the additional ring 17 is large, which can ensure that the steel cable 11 does not contact the gear 14 during the entire winding process. During the gear grinding process, the additional ring 17 is disassembled so as not to block the processing flow of the grinding wheel 27 and the gear 14.

[0037] A collar is fixed to the end of the steel cable 11, and a notch is present at the end of the traction table 18. A roller is installed in the notch, and the collar is fitted into the roller. In this way, the steel cable 11 will not twist due to the change in the angle of the processing gear 14 during the traction process. When the support frame 9 rotates to approach the locking disc 12, the direction of the force will change. At this time, the steel cable 11 is in its shortest state, and the support frame 9 needs to pull the downward-moving processing gear 14. At this time, the steel cable 11 is slowly released instead of being wound up, so that the pressure on the support frame 9 will not be too great when the direction of the force changes, ensuring the stable clamping process of the processing gear 14. The three traction devices 10 can further improve the traction effect, and the number can be further increased to accommodate processing gears 14 with larger weights.

[0038] When the gear 14 needs to be heated for tempering, the electric heating module built into the connecting ring 16 heats it, and the fan module blows the heat out and covers the damaged area of ​​the gear 14. The temperature of 200 degrees Celsius will not damage the quality of the gear 14, but it can effectively release the stress generated by the burns and cracks, greatly reducing the problem of the damage continuing to expand and causing the gear 14 to become completely unusable.

[0039] When the upper electric heater 25 is heating, the bottom electric heating pad 21 transfers heat to the bottom of the processed gear 14 through contact heat transfer, covering the weaker parts covered by the electric heater 25, ensuring that the damaged parts are heated evenly, and allowing the constant temperature tempering process to proceed smoothly.

[0040] Connect the transmission line 23 to the positioning post 13 to complete the power transmission and ensure that the electric heating equipment can work in an orderly manner.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CNC gear grinding machine tool based on gear machining, characterized in that: The device includes a drive base, a rotatable rotary table fixed to the top output end of the drive base, a locking disc for fixing the machining gear mounted on the top of the rotary table, vertically arranged side covers fixed to both sides of the drive base, a grinding table capable of lifting and translating located on the outer side of the rotary table, a vertically arranged grinding wheel mounted on the drive end of the grinding table, an infrared detector for detecting the temperature of the machining gear mounted in the grinding table, a power platform mounted at the front end of the drive base, a support frame mounted on the rotating end of the power platform, a connecting ring for locking the machining gear and connecting to the support frame located on the outer side of the machining gear, and an electric heater for heating the machining gear mounted on the outer edge of the connecting ring.

2. The CNC gear grinding machine tool based on gear machining according to claim 1, characterized in that: There are two grinding tables, which are symmetrically distributed on both sides of the rotary table. Two cooling pipes for spraying coolant are installed at the front end of the grinding tables.

3. A CNC gear grinding machine tool based on gear machining according to claim 2, characterized in that: The front end of the grinding table protrudes upwards, and the infrared detector is vertically fixed to the protruding part. Vertical air guns are fixed to both sides of the infrared detector, and a wear detector is installed at the bottom of the front end of the grinding table.

4. A CNC gear grinding machine tool based on gear machining according to claim 3, characterized in that: The top surface of the connecting ring has multiple adjustment holes that penetrate its bottom. A clamping ring is placed below the machining gear. The connecting ring is fixed to the clamping ring by a locking rod. The surface of the support frame is fixed with a locking bolt that matches the adjustment holes.

5. A CNC gear grinding machine tool based on gear machining according to claim 4, characterized in that: The locking disc is composed of multiple outwardly expanding fan-shaped discs. A positioning post is fixed to the top of the fan-shaped discs. A vertically arranged back plate is fixed to the rear end of the drive base. A top plate is fixed to the top of the back plate and the side cover. A recovery valve is installed on the top surface of the drive base.

6. A CNC gear grinding machine tool based on gear machining according to claim 5, characterized in that: An adding ring is installed on the outer side of the connecting ring. The top surface of the adding ring and the side surface of the connecting ring have interconnected docking holes. A traction device is fixedly connected to the back plate, and a steel cable connects the traction device and the adding ring.

7. A CNC gear grinding machine tool based on gear machining according to claim 6, characterized in that: The number of traction devices is three, and the traction devices on both sides are inclined. Multiple outwardly protruding traction platforms are fixed to the outer side of the adding ring.

8. A CNC gear grinding machine tool based on gear machining according to claim 7, characterized in that: The electric heater includes an electric heating module and a fan module. The electric heating module is located inside the connecting ring, and multiple air outlets are opened on the outside of the connecting ring, with the air outlets tilted downwards.

9. A CNC gear grinding machine tool based on gear machining according to claim 8, characterized in that: The outer edge of the clamping ring is fixed with an electric heating pad, which is attached to the processing gear. Multiple electric heating pads are arranged in a ring at equal intervals.

10. A CNC gear grinding machine tool based on gear machining according to claim 9, characterized in that: The top of the positioning post is provided with a plug valve, and multiple transmission lines are fixedly connected to the middle of the connecting ring. The ends of the transmission lines are fixedly connected with waterproof plugs that are compatible with the plug valve.

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