Electrical control system for high-precision bearing intelligent heat treatment equipment

Abstract

The present invention proposes an electrical control system for intelligent heat treatment equipment for high-precision bearings, which involves high-precision bearing processing for offshore wind power generation equipment and belongs to the technical field of heat treatment equipment. The intelligent heat treatment equipment involved includes an inductor-loaded three-coordinate servo motion mechanism and a workpiece servo turntable equipped with two servo motors that are simultaneously connected in transmission. The inductor-loaded three-coordinate servo motion mechanism is provided with three linear displacement sensors, and the inductor load unit is provided with a non-contact sensor. The present invention includes an intelligent electronic tracking system and a dual-motor clearance elimination system for the workpiece servo turntable, with the numerical control system being the control core. The present invention uses an intelligent electronic tracking system for feedback and self-adjustment of the gap between the inductor and the workpiece, thereby achieving stable control of the heating power. The dual-motor clearance elimination system for the workpiece servo turntable is used to ensure the quality of the quenched products of high-precision bearings, realize continuous production, improve production efficiency, and reduce energy consumption.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat treatment equipment, in particular to an electrical control system of high-precision bearing intelligent heat treatment equipment for offshore wind power generation equipment. Background Art

[0002] The slewing bearings used in offshore wind turbines are high-precision bearings with high dimensional accuracy requirements, complex load bearings, and difficult assembly, disassembly, and maintenance. Therefore, stringent design and manufacturing requirements are imposed. Furthermore, a slewing bearing failure directly impacts the performance of the wind turbine, requiring high reliability and long life. Due to the need for force transmission, one of the rings of the high-precision bearings is typically equipped with teeth. This ring is made of case-hardened steel 42CrMo or 5CrMnMo. The tooth surfaces are heat-treated as required, with the hardened layer on the tooth surfaces reaching a thickness of 1 to 6 mm and a hardness of 52 to 60 HRC.

[0003] In order to improve the quenching quality of the tooth part of the sensor ring and control the accuracy, intelligent heat treatment equipment is usually used. The core CNC system is used to realize intelligent control. The intelligent heat treatment equipment includes a gantry frame, a workpiece servo turntable, an inductor load unit, an inductor load three-coordinate servo motion mechanism, a gantry frame, a workpiece servo turntable, an inductor load unit, and an inductor load three-coordinate servo motion mechanism to form the main body of the equipment. In addition, it is also equipped with an IGBT power cabinet, an electrical control cabinet, a cooling water circulation system, a quenching liquid cooling circulation system, and a CNC system. Summary of the Invention

[0004] In order to realize the induction quenching heat treatment of high-precision bearings of offshore wind power generation equipment, improve work efficiency, realize intelligent control and feedback closed-loop adjustment, and thus realize artificial intelligence control to ensure the quality of the quenching hardened layer of high-precision bearings, the present invention proposes an electrical control system for high-precision bearing intelligent heat treatment equipment.

[0005] To this end, the present invention adopts the following technical solution: an electrical control system for high-precision bearing intelligent heat treatment equipment, wherein the structure of the high-precision bearing intelligent heat treatment equipment involved is as follows: a gantry frame, a workpiece servo turntable, an inductor load unit, and an inductor load three-coordinate servo motion mechanism constitute the equipment body, and the three direction servo motors of the inductor load three-coordinate servo motion mechanism are defined as the X direction servo motor, the Y direction servo motor, and the Z direction servo motor; in addition, it is also equipped with an IGBT power supply cabinet, an electrical control cabinet, a cooling water circulation system, a quenching liquid cooling circulation system, and a numerical control system;

[0006] The feature is that the workpiece servo turntable is a workpiece servo turntable equipped with two servo motors that are simultaneously connected in transmission, and the two servo motors are defined as a first turntable servo motor and a second turntable servo motor;

[0007] The sensor load three-coordinate servo motion mechanism is equipped with three linear displacement sensors, defined as an X-direction linear displacement sensor, a Y-direction linear displacement sensor, and a Z-direction linear displacement sensor; the sensor load unit is connected to the upper and lower motion slides of the sensor load three-coordinate servo motion mechanism, and the sensor load unit is equipped with a non-contact sensor;

[0008] The electrical control system of the high-precision bearing intelligent heat treatment equipment mentioned above includes a numerical control system, an electrical control cabinet, an X-direction linear displacement sensor, a Y-direction linear displacement sensor, a Z-direction linear displacement sensor, and a non-contact sensor. The electrical control system also includes an intelligent electronic tracking system and a workpiece servo rotary table dual-motor backlash elimination system. The numerical control system is the control core, and the various electrical components communicate with the numerical control system via a Profinet bus.

[0009] The intelligent electronic tracking system and automatic tool setting utilize the measurement function of the CNC system, relying on electronic ignition to connect the control loop to feedback signals to the CNC system, which then calculates and records the current coordinates of the servo motor. The linear contact displacement sensor feedbacks signals, and during the adjustment process, the CNC system automatically outputs and controls the servo motor corresponding to the direction of the linear contact displacement sensor. When the workpiece is heated, it causes physical thermal expansion and contraction, causing deformation of the workpiece surface. The relative position of the non-contact sensor and the workpiece surface shifts. This offset is detected by the non-contact sensor and transmitted to the CNC system. After calculation, the CNC system automatically adjusts the servo motor to move in the opposite direction when the offset exceeds the reference value until it moves within the reference value error range.

[0010] The workpiece servo turntable dual-motor backlash elimination system is driven by the first turntable servo motor and the second turntable servo motor respectively. When the required output torque is zero, the output torque of the first turntable servo motor is equal to the output torque of the second turntable servo motor, but in opposite directions; when the required output torque increases, the first turntable servo motor or the second turntable servo motor is driven in the opposite direction to eliminate the backlash; at any time, at least one of the two motors will apply a non-zero torque. Under the action of this torque, the motion backlash of the main gear cannot exist.

[0011] Furthermore, the numerical control system is a Siemens 840Dsl numerical control system, and the Profinet bus is a Siemens rofinet bus; the use of the Siemens numerical control system and the Siemens rofinet bus has strong anti-interference ability, fast transmission speed, and convenient topology structure.

[0012] Furthermore, the first turntable servo motor and the second turntable servo motor respectively engage with the driven large gear plate of the workpiece servo turntable through the driving gear to achieve transmission connection; this direct drive structure has a simple layout and is more convenient for intelligent control to eliminate gaps.

[0013] The beneficial effects of the present invention are as follows: an intelligent electronic tracking system is adopted, and when the equipment is performing quenching processing, the linear displacement sensor automatically sets the reference point after the automatic tool alignment is completed; when heating begins, the system performs feedback and self-adjusts the gap between the sensor and the workpiece, thereby achieving stable control of the heating power; a workpiece servo turntable dual-motor backlash elimination system is adopted, and the dual-motor backlash elimination has performance advantages, and the repeated positioning accuracy can reach 0.01mm, the control is flexible, and the two motors are driven in opposite directions to eliminate backlash; thereby realizing intelligent control, ensuring the continuous and normal operation of the equipment, ensuring the quality of the quenched products of high-precision bearings, realizing continuous production, improving production efficiency, and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a simplified structural diagram of the high-precision bearing intelligent heat treatment equipment in the present invention;

[0015] Figure 2 This is a control block diagram of the electrical control system of the high-precision bearing intelligent heat treatment equipment of the present invention;

[0016] Figure 3 This is a control flow chart of the dual-motor backlash elimination system of the workpiece servo turntable in the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described below with reference to the accompanying drawings.

[0018] Combine Figure 1 As shown, the structure of the high-precision bearing intelligent heat treatment equipment involved in the present invention is as follows: the main body of the equipment is composed of a gantry frame 1, a workpiece servo turntable 5, an inductor load unit 3, and an inductor load three-coordinate servo motion mechanism 4. The three directional servo motors of the inductor load three-coordinate servo motion mechanism are defined as the X-direction servo motor, the Y-direction servo motor, and the Z-direction servo motor; in addition, it is also equipped with an IGBT power supply cabinet 7, an electrical control cabinet 10, a cooling water circulation system 8, a quenching liquid cooling circulation system 9, and a numerical control system 6;

[0019] The workpiece servo turntable 5 is a workpiece servo turntable equipped with two servo motors that are simultaneously connected in transmission. The two servo motors are defined as a first turntable servo motor and a second turntable servo motor.

[0020] Three linear displacement sensors are provided on the sensor load three-coordinate servo motion mechanism, which are defined as an X-direction linear displacement sensor, a Y-direction linear displacement sensor, and a Z-direction linear displacement sensor; the sensor load unit 3 is connected to the upper and lower motion slides of the sensor load three-coordinate servo motion mechanism, and a non-contact sensor 2 is provided on the sensor load unit.

[0021] Combine Figure 2、 Figure 3 As shown, the electrical control system of the high-precision bearing intelligent heat treatment equipment of the present invention is described, including a numerical control system, an electrical control cabinet, an X-direction linear displacement sensor, a Y-direction linear displacement sensor, a Z-direction linear displacement sensor, and a non-contact sensor. The electrical control system includes an intelligent electronic tracking system and a workpiece servo turntable dual-motor backlash elimination system; the numerical control system is the control core, and each electrical component communicates with the numerical control system via a Profinet bus;

[0022] The intelligent electronic tracking system and automatic tool setting utilize the measurement function of the CNC system, relying on electronic ignition to connect the control loop to feedback signals to the CNC system, which then calculates and records the current coordinates of the servo motor. The linear contact displacement sensor feedbacks signals, and during the adjustment process, the CNC system automatically outputs and controls the servo motor corresponding to the direction of the linear contact displacement sensor. When the workpiece is heated, it causes physical thermal expansion and contraction, causing deformation of the workpiece surface. The relative position of the non-contact sensor and the workpiece surface shifts. This offset is detected by the non-contact sensor and transmitted to the CNC system. After calculation, the CNC system automatically adjusts the servo motor to move in the opposite direction when the offset exceeds the reference value until it moves within the reference value error range.

[0023] The workpiece servo turntable dual-motor backlash elimination system is driven by the first turntable servo motor and the second turntable servo motor respectively. When the required output torque is zero, the output torque of the first turntable servo motor is equal to the output torque of the second turntable servo motor, but in opposite directions; when the required output torque increases, the first turntable servo motor or the second turntable servo motor is driven in the opposite direction to eliminate the backlash; at any time, at least one of the two motors will apply a non-zero torque. Under the action of this torque, the motion backlash of the main gear cannot exist.

[0024] In the present invention, the numerical control system is a Siemens 840Dsl numerical control system, and the Profinet bus is a Siemens rofinet bus. The Siemens numerical control system and the Siemens rofinet bus have strong anti-interference ability, fast transmission speed and convenient topological structure.

[0025] In the present invention, the first turntable servo motor and the second turntable servo motor respectively engage with the driven large gear plate of the workpiece servo turntable through the driving gear to achieve transmission connection; this direct drive structure has a simple layout and is more convenient for intelligent control to eliminate gaps.

[0026] The core of the present invention lies in: configuring an intelligent electronic tracking system and a workpiece servo turntable dual-motor backlash elimination system through a numerical control system.

Claims

1. Electrical control system for high-precision bearing intelligent heat treatment equipment. The structure of the high-precision bearing intelligent heat treatment equipment involved is as follows: the main body of the equipment consists of a gantry frame, a workpiece servo rotary table, an inductor load unit, and an inductor load three-coordinate servo motion mechanism. The three directional servo motors of the inductor load three-coordinate servo motion mechanism are defined as the X-direction servo motor, the Y-direction servo motor, and the Z-direction servo motor. In addition, it is equipped with an IGBT power supply cabinet, an electrical control cabinet, a cooling water circulation system, a quenching liquid cooling circulation system, and a CNC system. Its characteristics are: The workpiece servo turntable is a workpiece servo turntable equipped with two servo motors that are simultaneously connected in transmission, and the two servo motors are defined as a first turntable servo motor and a second turntable servo motor; The sensor load three-coordinate servo motion mechanism is equipped with three linear displacement sensors, defined as an X-direction linear displacement sensor, a Y-direction linear displacement sensor, and a Z-direction linear displacement sensor; the sensor load unit is connected to the upper and lower motion slides of the sensor load three-coordinate servo motion mechanism, and the sensor load unit is equipped with a non-contact sensor; The electrical control system of the high-precision bearing intelligent heat treatment equipment mentioned above includes a numerical control system, an electrical control cabinet, an X-direction linear displacement sensor, a Y-direction linear displacement sensor, a Z-direction linear displacement sensor, and a non-contact sensor. The electrical control system also includes an intelligent electronic tracking system and a workpiece servo rotary table dual-motor backlash elimination system. The numerical control system is the control core, and the various electrical components communicate with the numerical control system via a Profinet bus. The intelligent electronic tracking system and automatic tool setting utilize the measurement function of the CNC system, relying on electronic ignition to connect the control loop to feedback signals to the CNC system, which then calculates and records the current coordinates of the servo motor. The linear contact displacement sensor feedbacks signals, and during the adjustment process, the CNC system automatically outputs and controls the servo motor corresponding to the direction of the linear contact displacement sensor. When the workpiece is heated, it causes physical thermal expansion and contraction, causing deformation of the workpiece surface. The relative position of the non-contact sensor and the workpiece surface shifts. This offset is detected by the non-contact sensor and transmitted to the CNC system. After calculation, the CNC system automatically adjusts the servo motor to move in the opposite direction when the offset exceeds the reference value until it moves within the reference value error range. The workpiece servo turntable dual-motor backlash elimination system is driven by the first turntable servo motor and the second turntable servo motor respectively. When the required output torque is zero, the output torque of the first turntable servo motor is equal to the output torque of the second turntable servo motor, but in opposite directions. When the required output torque of the system increases, the first turntable servo motor or the second turntable servo motor is driven in the opposite direction to eliminate the backlash. At any time, at least one of the two motors will apply a non-zero torque. Under the action of this torque, the motion backlash of the main gear cannot exist.

2. The electrical control system for high-precision bearing intelligent heat treatment equipment according to claim 1 is characterized in that: The CNC system is Siemens 840Dsl CNC system, and the Profinet bus is Siemens PROFINET bus.

3. The electrical control system for high-precision bearing intelligent heat treatment equipment according to claim 1 or 2, characterized in that: The first turntable servo motor and the second turntable servo motor are respectively engaged with the driven large gear plate of the workpiece servo turntable through driving gears to achieve transmission connection.

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