Grinding machine workpiece polishing system and method based on torque detection

Abstract

The invention provides a grinding machine workpiece polishing control method based on torque detection, which comprises the following steps: S1, a roughness comparison table of a grinding wheel is preset, and each piece of data in the roughness comparison table comprises a workpiece material corresponding to the grinding wheel, workpiece hardness, workpiece roughness, a grinding wheel model, a rotating speed of a main shaft motor and an expected torque of the main shaft motor; s2, the material type, hardness and roughness parameters of a workpiece to be polished are determined, and the corresponding grinding wheel model, the rotating speed of a main shaft motor and the expected torque of the main shaft motor are inquired in the roughness comparison table according to the material type, hardness and roughness parameters; s3, the corresponding grinding wheel is loaded on the grinding machine, a spindle servo motor is switched to a speed control mode, and then the spindle servo motor is started until the spindle servo motor reaches the specified rotating speed; s4, collecting the current torque of the spindle motor, and recording the current torque as idle torque; s5, the grinding machine is started for polishing operation, and in the contact process of the grinding wheel and the workpiece, the torque of the main shaft servo motor is recorded in real time and is recorded as the polishing torque; and S6, the polishing torque is compared with the expected torque and the idle torque, and when the polishing torque is larger than the idle torque and smaller than the expected torque, the grinding machine is controlled to stop polishing operation. The machining efficiency and quality can be improved to a certain extent.

Description

Technical Field

[0001] The invention relates to a grinding machine processing technology, and in particular to a grinding machine workpiece polishing system and method based on torque detection. Background Art

[0002] Grinding machines are common industrial machine tools. At present, when grinding the surface roughness of parts, workers mainly rely on their experience to observe the sparks and sounds of the grinding wheel to judge whether the surface processing of the parts meets the requirements. However, this method places too high demands on workers and is too subjective, resulting in low production efficiency and difficulty in improving the yield rate. Summary of the invention

[0003] In view of this, the first object of the present invention is to provide a grinder workpiece polishing control method based on torque detection, which can improve the processing efficiency and quality to a certain extent.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: A method for controlling workpiece polishing of a grinding machine based on torque detection, comprising: S1. Pre-setting a roughness comparison table of a grinding wheel, wherein the roughness comparison table includes a plurality of comparison data, wherein each comparison data includes at least a workpiece parameter, a grinding wheel model, and a grinding machine control parameter; the grinding machine control parameter includes at least a spindle motor speed and an expected torque of the spindle motor; S2, determining the parameters of the workpiece to be polished, and accordingly searching the corresponding grinding wheel model and grinding machine control parameters in the roughness comparison table; S3, loading the corresponding grinding wheel onto the grinding machine, switching the spindle servo motor to the speed control mode, and then starting the spindle servo motor until the spindle servo motor reaches the specified speed; S4, collecting the current torque of the spindle motor and recording it as the idling torque; S5, starting the grinder to perform polishing operation, and in the process of contact between the grinding wheel and the workpiece, recording the torque of the spindle servo motor in real time and recording it as the polishing torque; S6. Compare the polishing torque with the expected torque and the idling torque, wherein when the polishing torque is greater than the idling torque and less than the expected torque, control the grinding machine to stop the polishing operation.

[0005] Preferably, the workpiece parameters include material type, hardness and roughness parameters of the workpiece.

[0006] Preferably, the grinding machine control parameters also include Z-axis feed amount.

[0007] Preferably, a mechanical arm is used to load the corresponding grinding wheel and the workpiece to be polished onto the grinding machine.

[0008] The second object of the present invention is to provide a grinder workpiece polishing control system based on torque detection, which can improve processing efficiency and quality to a certain extent.

[0009] In order to solve the above technical problems, the technical solution of the present invention is: A grinder workpiece polishing control system based on torque detection, comprising: A storage module configured to store a roughness comparison table; the roughness comparison table includes a plurality of comparison data, wherein each comparison data includes at least a workpiece parameter, a grinding wheel model, and a grinder control parameter; the grinder control parameter includes at least a spindle motor speed and an expected torque of the spindle motor; A query module, which is configured to query the corresponding grinding wheel model and grinding machine control parameters in the roughness comparison table according to the workpiece parameters of the workpiece to be polished; A control module configured to: Based on the data found in the roughness comparison table, the spindle servo motor is switched to a speed control mode, and then the spindle servo motor is started until the spindle servo motor reaches a specified speed; Collect the current torque of the spindle motor and record it as idling torque; Start the grinder to perform polishing operation, and during the contact between the grinding wheel and the workpiece, record the torque of the spindle servo motor in real time and record it as the polishing torque; The polishing torque is compared with the expected torque and the idling torque, wherein when the polishing torque is greater than the idling torque and less than the expected torque, the grinding machine is controlled to stop the polishing operation.

[0010] Preferably, it also includes a loading module, which is configured to load the corresponding grinding wheel onto the grinding machine; Preferably, the loading module comprises at least one robotic arm, and the robotic arm communicates with the control module.

[0011] The technical effects of the present invention are mainly reflected in the following aspects: Basic torque detection is used to determine the friction between the grinding wheel and the workpiece, and then to determine whether the surface roughness of the workpiece meets the standard; By setting up a roughness comparison table, you can quickly find the appropriate grinding wheel and grinding machine setting parameters to achieve the best processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of a roughness comparison table in the embodiment; Figure 2 It is a module diagram of the control system in the embodiment.

[0013] Figure numerals: 10, storage module; 20, query module; 30, control module. DETAILED DESCRIPTION

[0014] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp. Embodiment 1

[0015] This embodiment provides a grinding machine workpiece polishing control method based on torque detection, comprising: S1. Pre-set a roughness comparison table for the grinding wheel, wherein the roughness comparison table contains a number of comparison data, wherein each comparison data at least includes a workpiece parameter, a grinding wheel model, and a grinder control parameter; the grinder control parameter at least includes a Z-axis feed amount, a spindle motor speed, and an expected torque of the spindle motor.

[0016] The above roughness comparison table is generated in the following way: record various processing parameters of the current workpiece, detect the roughness of the current workpiece after the workpiece is polished, and record it in the table. After a large number of repeated operations with different parameters, a large amount of data is generated, thereby optimizing the data to generate the comparison table.

[0017] S2. Determine the parameters of the workpiece to be polished, and query the corresponding grinding wheel model and grinding machine control parameters in the roughness comparison table accordingly.

[0018] S3, load the corresponding grinding wheel onto the grinding machine, switch the spindle servo motor to the speed control mode, and then start the spindle servo motor until the spindle servo motor reaches the specified speed.

[0019] In this step, a robot arm is used to load the corresponding grinding wheel and the workpiece to be polished onto the grinding machine.

[0020] S4. Collect the current torque of the spindle motor and record it as the idling torque.

[0021] S5. Start the grinder to perform polishing operation, and during the contact process between the grinding wheel and the workpiece, record the torque of the spindle servo motor in real time and record it as the polishing torque.

[0022] When the grinding wheel is not in contact with the workpiece, its torque is the idling torque.

[0023] S6. Compare the polishing torque with the expected torque and the idling torque, wherein when the polishing torque is greater than the idling torque and less than the expected torque, control the grinding machine to stop the polishing operation. Embodiment 2

[0024] This embodiment provides a grinder workpiece polishing system based on torque detection, including a storage module 10 , a query module 20 , a loading module and a control module 30 .

[0025] The storage module 10 is configured to store a roughness comparison table; the roughness comparison table contains a number of comparison data, each of which contains at least workpiece parameters, grinding wheel model and grinder control parameters; the grinder control parameters include at least Z-axis feed amount, spindle motor speed and expected torque of the spindle motor.

[0026] The query module 20 is configured to query the corresponding grinding wheel model and grinding machine control parameters in the roughness comparison table according to the workpiece parameters of the workpiece to be polished.

[0027] The loading module is configured to load the corresponding grinding wheel onto the grinding machine; the loading module includes at least one robot arm, which communicates with the control module 30 .

[0028] The control module 30 is configured to: Based on the data found in the roughness comparison table, the spindle servo motor is switched to a speed control mode, and then the spindle servo motor is started until the spindle servo motor reaches a specified speed; Collect the current torque of the spindle motor and record it as idling torque; Start the grinder to perform polishing operation, and during the contact between the grinding wheel and the workpiece, record the torque of the spindle servo motor in real time and record it as the polishing torque; The polishing torque is compared with the expected torque and the idling torque, wherein when the polishing torque is greater than the idling torque and less than the expected torque, the grinding machine is controlled to stop the polishing operation.

[0029] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A method for controlling workpiece polishing of a grinding machine based on torque detection, characterized in that ,include: S1. Pre-setting a roughness comparison table of a grinding wheel, wherein the roughness comparison table includes a plurality of comparison data, wherein each comparison data includes at least a workpiece parameter, a grinding wheel model, and a grinding machine control parameter; the grinding machine control parameter includes at least a spindle motor speed and an expected torque of the spindle motor; S2, determining the parameters of the workpiece to be polished, and accordingly searching the corresponding grinding wheel model and grinding machine control parameters in the roughness comparison table; S3, loading the corresponding grinding wheel onto the grinding machine, switching the spindle servo motor to the speed control mode, and then starting the spindle servo motor until the spindle servo motor reaches the specified speed; S4, collecting the current torque of the spindle motor and recording it as the idling torque; S5, starting the grinder to perform polishing operation, and in the process of contact between the grinding wheel and the workpiece, recording the torque of the spindle servo motor in real time and recording it as the polishing torque; S6. Compare the polishing torque with the expected torque and the idling torque, wherein when the polishing torque is greater than the idling torque and less than the expected torque, control the grinding machine to stop the polishing operation.

2. A method for controlling a grinder workpiece polishing based on torque detection according to claim 1, characterized in that ,The workpiece parameters include the material type, hardness and roughness parameters of the workpiece.

3. A method for controlling a grinder workpiece polishing based on torque detection according to claim 2, characterized in that ,The grinder control parameters also include the Z axis feed amount.

4. The method for controlling the workpiece polishing of a grinding machine based on torque detection according to claim 1, characterized in that ,The corresponding grinding wheel and the workpiece to be polished are loaded onto the grinding machine using a robotic arm.

5. A grinder workpiece polishing system based on torque detection, characterized in that ,include: A storage module configured to store a roughness comparison table; the roughness comparison table includes a plurality of comparison data, wherein each comparison data includes at least a workpiece parameter, a grinding wheel model, and a grinder control parameter; the grinder control parameter includes at least a spindle motor speed and an expected torque of the spindle motor; A query module, which is configured to query the corresponding grinding wheel model and grinding machine control parameters in the roughness comparison table according to the workpiece parameters of the workpiece to be polished; A control module configured to: Based on the data found in the roughness comparison table, the spindle servo motor is switched to a speed control mode, and then the spindle servo motor is started until the spindle servo motor reaches a specified speed; Collect the current torque of the spindle motor and record it as idling torque; Start the grinder to perform polishing operation, and during the contact between the grinding wheel and the workpiece, record the torque of the spindle servo motor in real time and record it as the polishing torque; The polishing torque is compared with the expected torque and the idling torque, wherein when the polishing torque is greater than the idling torque and less than the expected torque, the grinding machine is controlled to stop the polishing operation.

6. A grinder workpiece polishing system based on torque detection according to claim 5, characterized in that , also includes a loading module, which is configured to load the corresponding grinding wheel onto the grinding machine.

7. A grinder workpiece polishing system based on torque detection according to claim 6, characterized in that ,The loading module includes at least one robotic arm, which communicates with the control module.

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