Grinding component capable of measuring grinding temperature in real time and grinding pressure control method thereof

Abstract

The present invention provides a grinding component capable of measuring grinding temperature in real time and a grinding pressure control method thereof, comprising: a grinding device, comprising a grinding head spindle, a motor pulley and a combined grinding wheel; a temperature control device, comprising a temperature acquisition module and an industrial computer, wherein the temperature acquisition module is arranged between two adjacent grinding wheels of the combined grinding wheel, and the temperature acquisition module is connected to the industrial computer via a communication module; a grinding control device, comprising a grinding head frame, a sleeve and a cylinder. The present invention provides a grinding component capable of measuring grinding temperature in real time and a grinding pressure control method thereof, under the premise of not damaging the workpiece and the grinding wheel, the grinding temperature of the combined grinding wheel can be measured in real time during the grinding process by using the temperature control device, and when the grinding temperature exceeds a preset temperature, the industrial computer can control the grinding control device to reduce the grinding pressure between the grinding wheel and the workpiece, and prevent the workpiece from being damaged by excessive grinding temperature.

Description

Technical Field

[0001] The invention relates to the technical field of grinding processing, and in particular to a grinding component capable of measuring grinding temperature in real time and a grinding pressure regulating method thereof. Background Art

[0002] Grinding technology is becoming more and more important in the modern machinery manufacturing industry. Grinding technology can be used to obtain various parts with high precision and high quality. However, the grinding power in the grinding process is mostly converted into heat, which causes the temperature of the grinding area to rise sharply. The large amount of heat generated in the grinding area will damage the quality of the ground workpiece, causing defects such as grinding burns and micro cracks on the workpiece surface, and will also reduce the service life of the grinding wheel.

[0003] There are three methods for measuring grinding temperature: fiber optic temperature measurement, infrared temperature measurement, and thermocouple temperature measurement. In the fiber optic temperature measurement method, the fiber optic sensor is located below the surface of the workpiece and does not contact the measurement area. The measurement is inaccurate and expensive. The infrared temperature measurement method collects infrared thermal radiation emitted by the heat source, converts it into an electrical signal, and then converts it into the temperature value of the object through an amplifier and signal processing circuit. Due to the diffusion and convection of grinding heat in the air, there is a gap between the measured grinding temperature value and the actual temperature value. Thermocouple temperature measurement is

[0004] Thermocouples are used to convert the measured temperature into electromotive force signals, and then after amplification and signal processing, the grinding temperature is finally displayed using temperature measurement software. Thermocouple temperature measurement is accurate and easy to make, but the traditional thermocouple temperature measurement method will destroy the integrity of the workpiece.

[0005] During the end face grinding process of the grinding wheel, the grinding wheel forms a closed space and rotates at high speed. It is difficult to measure the grinding temperature accurately in real time without damaging the workpiece and the grinding wheel.

[0006] Therefore, real-time measurement of the grinding temperature in the grinding zone of the grinding wheel and adjustment of the grinding pressure according to the grinding temperature are of great significance to improving the workpiece processing quality and the service life of the grinding wheel. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a grinding component that can measure the grinding temperature in real time and a grinding pressure control method thereof. Under the premise of not damaging the workpiece and the grinding wheel, the temperature control device can be used to measure the grinding temperature of the grinding processing area of ​​the combined grinding wheel in real time during the grinding process. At the same time, when the grinding temperature exceeds the preset temperature, the industrial computer can control the grinding control device to reduce the grinding pressure between the grinding wheel and the workpiece, prevent the workpiece from being damaged by excessive grinding temperature, and improve the processing quality of the workpiece and the service life of the grinding wheel.

[0008] In order to achieve the above purpose, a technical solution adopted by the present invention is:

[0009] A grinding assembly capable of measuring grinding temperature in real time comprises: a grinding device, comprising a grinding head spindle, a motor pulley and a combined grinding wheel, wherein the grinding head spindle is connected to the motor pulley through a spline sleeve, and the combined grinding wheel is connected to the grinding head spindle through a spindle connecting plate; a temperature control device, comprising a temperature acquisition module and an industrial computer, wherein the temperature acquisition module is arranged between two adjacent grinding wheels of the combined grinding wheel, and the temperature acquisition module is connected to the industrial computer through a communication module; a grinding control device, comprising a grinding head frame, a sleeve and a cylinder, wherein the grinding head frame is located between the motor pulley and the combined grinding wheel, the grinding head frame is connected to the motor pulley through a flange, the sleeve is sleeved outside the grinding head spindle, the sleeve is connected to the grinding head spindle through a first rolling bearing, one end of the sleeve is extended and arranged between the grinding head frame and the grinding head spindle, the free end of the piston rod of the cylinder is arranged on the cylinder connecting plate, the end of the cylinder away from the piston rod is arranged on the grinding head frame, and the cylinder is electrically connected to the industrial computer.

[0010] Furthermore, the grinding device also includes an intermediate connecting plate, which is arranged on a side of the main shaft connecting plate away from the motor pulley through a spring buffer structure, and the combined grinding wheel includes six grinding wheels arranged in a ring array.

[0011] Furthermore, each of the grinding wheels is arranged on the middle connecting plate via a grinding wheel fixing block, and a baffle is arranged on the outer side wall of the grinding wheel fixing block.

[0012] Furthermore, the temperature acquisition module includes a thermocouple wire, a thermocouple amplifier, the communication module, a single-chip microcomputer and a wireless power supply module. The thermocouple wire is arranged on two adjacent grinding wheel fixing blocks through a temperature transfer fixing block. The thermocouple wire is located between two adjacent grinding wheels. The thermocouple amplifier, the communication module, the single-chip microcomputer and the wireless power supply module are arranged on the intermediate connecting disk through a bottom plate. The thermocouple amplifier is electrically connected to the thermocouple wire and the single-chip microcomputer. The single-chip microcomputer is connected to the industrial computer through the communication module. The wireless power supply module provides electrical energy to the thermocouple amplifier, the communication module and the single-chip microcomputer. The industrial computer is electrically connected to the cylinder. The bottom plate is located in a circular area composed of grinding wheels arranged in a ring array.

[0013] Furthermore, the temperature transfer fixed block is arranged on the grinding wheel fixed block through a fixed base, and the temperature transfer fixed block is provided with square holes, two thermocouple wires are arranged in each of the square holes, a heat insulation layer is arranged between adjacent thermocouple wires, and a heat insulation layer is arranged between the thermocouple wires and the inner wall of the square hole.

[0014] Furthermore, the axis of the square hole is parallel to the axis of the grinding head spindle, and the heat insulation layer is a mica sheet.

[0015] Furthermore, the communication module is a Bluetooth communication module.

[0016] Furthermore, the grinding head control device also includes at least two guide rods, both ends of the guide rods are provided with external threads, the outer wall of the grinding head frame is provided with a limit portion, the limit portion is provided with a guide hole, one end of the guide rod is connected to the cylinder connecting plate, and the other end of the guide rod is provided with a limit nut passing through the guide hole, and the axis of the guide rod is parallel to the axis of the grinding head spindle.

[0017] Furthermore, the first rolling bearing includes an inner ring, an outer ring and a rolling body sandwiched between the inner ring and the outer ring, the inner ring is arranged on the grinding head main shaft, the outer ring is arranged on the cylinder connecting plate, a retaining ring is arranged on the grinding head main shaft, and the inner ring is located between the retaining ring and the cylinder connecting plate.

[0018] The present invention also provides a grinding pressure control method for a grinding component that can measure the grinding temperature in real time based on any one of the above items, comprising the following steps: S10 the user sets the upper limit of the working temperature, the safe use temperature and the safe grinding pressure of the grinding wheel through an industrial computer; S20 the grinding component is turned on to grind the workpiece, and when the temperature control device detects that the temperature of the grinding processing area of ​​the combined grinding wheel reaches the upper limit of the working temperature, the industrial computer controls the cylinder of the grinding control device to reduce the pressure applied to the workpiece; S30 when the temperature control device detects that the temperature of the grinding processing area of ​​the combined grinding wheel reaches the safe use temperature, the industrial computer controls the grinding control device to restore the grinding pressure between the combined grinding wheel and the workpiece, continues to grind the workpiece, and completes the processing task.

[0019] The above technical solution of the present invention has the following advantages compared with the prior art:

[0020] The present invention provides a grinding component capable of measuring grinding temperature in real time and a grinding pressure control method thereof. Under the premise of not damaging the workpiece and the grinding wheel, the grinding temperature of the combined grinding wheel can be measured in real time during the grinding process by utilizing the temperature control device. Meanwhile, when the grinding temperature exceeds a preset temperature, the industrial computer can control the grinding control device to reduce the grinding pressure between the grinding wheel and the workpiece, thereby preventing damage to the workpiece due to excessively high grinding temperature and improving the processing quality of the workpiece and the service life of the grinding wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solutions and beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0022] Figure 1 Shown is a structural diagram of a grinding assembly capable of measuring grinding temperature in real time according to an embodiment of the present invention;

[0023] Figure 2 Shown is a front view of a grinding assembly capable of measuring grinding temperature in real time according to an embodiment of the present invention;

[0024] Figure 3 Shown is a cross-sectional view of a grinding assembly capable of measuring grinding temperature in real time according to an embodiment of the present invention;

[0025] Figure 4 The figure shows a structural diagram of a temperature transfer fixing block according to an embodiment of the present invention;

[0026] Figure 5 Shown Figure 4 Cross-sectional view along FF direction;

[0027] Figure 6 Shown Figure 4 Cross-sectional view along DD direction;

[0028] Figure 7 FIG. 1 is a connection structure diagram of a temperature control device according to an embodiment of the present invention.

[0029] Reference numerals in the figures:

[0030] 11 grinding head spindle, 12 motor pulley, 13 spline sleeve, 14 spindle connecting plate, 151 grinding wheel fixing block, 152 grinding wheel, 153 baffle, 16 intermediate connecting plate, 17 second rolling bearing, 21 bottom plate, 22 thermocouple wire, 23 thermocouple amplifier, 24 communication module, 25 single chip microcomputer, 26 wireless power supply module, 28 temperature transfer fixing block, 281 square hole, 282 thermal insulation layer, 31 grinding head frame, 32 sleeve, 33 cylinder, 34 first rolling bearing, 341 inner ring, 342 outer ring, 35 cylinder connecting plate, 36 guide rod, 37 limit part, 38 flange, 39 retaining ring, 4 metal wire. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] This embodiment provides a grinding component that can measure the grinding temperature in real time, such as Figures 1 to 3As shown, it includes a grinding device, a temperature control device and a grinding control device, the grinding device is used to grind the workpiece, the temperature control device is used to measure the temperature of the grinding processing area of ​​the combined grinding wheel of the grinding device in real time, and the grinding control device is used to adjust the grinding work of the grinding device. When the temperature of the grinding processing area of ​​the combined grinding wheel exceeds the preset temperature value, the grinding control device will reduce the grinding pressure between the combined grinding wheel and the workpiece to prevent irreversible damage to the workpiece caused by excessive temperature. When the temperature of the grinding processing area of ​​the combined grinding wheel returns to the safe use temperature, the grinding control device will control the combined grinding wheel to continue grinding the workpiece.

[0033] The grinding body includes a grinding head spindle 11, a motor pulley 12, a combined grinding wheel, and an intermediate connecting plate 16. The grinding head spindle 11 is provided with a spline matched with a spline sleeve 13. The grinding head spindle 11 is connected to the motor pulley 12 through the spline sleeve 13, and the motor pulley 12 drives the grinding head spindle 11 to rotate at high speed through the spline sleeve 13. Since the grinding force is very large during the end face grinding process, and the grinding head spindle 11 is a hollow shaft rotating at high speed, if the motor pulley 12 and the grinding head spindle 11 are connected by a flat key, it may cause insufficient strength of the shaft. Considering that compared with the flat key connection, the total contact area of ​​the spline connection is increased, and a larger torque can be transmitted. The combined grinding wheel is connected to the grinding head spindle 11 through the spindle connecting plate 14. The grinding head spindle 11 drives the combined grinding wheel to rotate during high-speed rotation, thereby realizing the grinding of the workpiece by the combined grinding wheel. The intermediate connection plate 16 is arranged on the side of the spindle connection plate 14 away from the motor pulley 12 through a spring buffer structure. The buffer structure includes a spring seat, a grinding head seat and a spring. The spring seat is arranged on the intermediate connection plate 16, and the grinding head seat is arranged on the grinding head spindle 11. One end of the spring is connected to the step of the spring seat, and the other end of the spring is connected to the step of the grinding head seat. The buffer structure protects the workpiece and the combined grinding wheel. The combined grinding wheel includes six grinding wheels 152 arranged in a circular array. Each of the grinding wheels 152 is arranged on the intermediate connection plate 16 through a grinding wheel fixing block 151. A baffle 153 is arranged on the outer wall of the grinding wheel fixing block 151 to prevent the grinding fluid and grinding waste from splashing.

[0034] The temperature control device includes a temperature acquisition module and an industrial computer. The temperature acquisition module is arranged between two adjacent grinding wheels 152 of the combined grinding wheel, and the temperature acquisition module is connected to the industrial computer through a communication module 24. The temperature acquisition module includes a thermocouple wire 22, a thermocouple amplifier 23, the communication module 24, a single-chip microcomputer 25, and a wireless power supply module 26. Figures 4 to 6As shown, the thermocouple wire 22 is arranged on two adjacent grinding wheel fixing blocks 151 through a temperature transfer fixing block 28, the thermocouple wire 22 is located between two adjacent grinding wheels 152, and the thermocouple amplifier 23, the communication module 24, the single chip microcomputer 25 and the wireless power supply module 26 are arranged on the middle connection plate 16 through a bottom plate 21. Figure 7 As shown, the thermocouple amplifier 23 is electrically connected to the thermocouple wire 22 and the single-chip microcomputer 25 through the metal wire 4, the single-chip microcomputer 25 is connected to the industrial computer through the communication module 24, and the wireless power supply module 26 provides power to the thermocouple amplifier 23, the communication module 24 and the single-chip microcomputer 25. The grinding wheel 152 is fan-shaped, and the grinding wheel 152 is evenly fixed to the end face of the grinding wheel fixing block 151 through a dovetail groove. The six fan-shaped grinding wheels 152 are arranged in a circular array, and the bottom plate 21 is located in a circular area composed of the grinding wheels 152 arranged in the circular array. Preferably, the communication module 24 is a Bluetooth communication module 24.

[0035] The temperature transfer fixed block 28 is arranged on the grinding wheel fixed block 151 through a fixed base, and the temperature transfer fixed block 28 is provided with a square hole 281, two thermocouple wires 22 are arranged in each of the square holes 281, a heat insulation layer 282 is arranged between adjacent thermocouple wires 22, and a heat insulation layer 282 is arranged between the thermocouple wires 22 and the inner wall of the square hole 281. The axis of the square hole 281 is parallel to the axis of the grinding head spindle 11, and the heat insulation layer 282 is a mica sheet.

[0036] The grinding control device includes a grinding head frame 31, a sleeve 32, a cylinder 33 and at least two guide rods 36. The grinding head frame 31 is located between the motor pulley 12 and the combined grinding wheel. The grinding head frame 31 is connected to the motor pulley 12 through a flange 38. The flange 38 is connected to the motor pulley 12 through a second rolling bearing 17. The inner ring of the second rolling bearing 17 is connected to the motor pulley 12. The outer ring of the second rolling bearing 17 is connected to the flange 38. The inner ring of the second rolling bearing 17 is supported on the retaining ring of the motor pulley 12. The outer ring of the second rolling bearing 17 is supported on the retaining ring of the flange 38. The sleeve 32 is sleeved on the outside of the grinding head spindle 11. The sleeve 32 is connected to the grinding head spindle 11 through a first rolling bearing 34. The first rolling bearing 34 includes an inner ring 341, an outer ring 342, and a rolling element sandwiched between the inner ring 341 and the outer ring 342. The inner ring 341 is arranged on the grinding head spindle 11, and the outer ring 342 is arranged on the cylinder connecting plate 35. A retaining ring 39 is arranged on the grinding head spindle 11, and the inner ring 341 is located between the retaining ring 39 and the cylinder connecting plate 35. The retaining ring 39 is embedded in the grinding head spindle 11, so that the industrial computer controls the combined grinding wheel upward to reduce the grinding pressure between the combined grinding wheel and the workpiece, thereby realizing the axial positioning of the grinding head spindle 11 and the sleeve 32. One end of the sleeve 32 is inserted between the grinding head frame 31 and the grinding head spindle 11, and the other end of the sleeve 32 is arranged on the cylinder connecting plate 35. The free end of the piston rod of the cylinder 33 is arranged on the cylinder connecting plate 35, and the end of the cylinder 33 away from the piston rod is arranged on the grinding head frame 31. The cylinder 33 is electrically connected to the industrial computer. External threads are arranged at both ends of the guide rod 36, and a limit portion 37 is arranged on the outer wall of the grinding head frame 31. A guide hole is arranged on the limit portion 37. One end of the guide rod 36 is connected to the cylinder connecting plate 35, and the other end of the guide rod 36 is provided with a limit nut through the guide hole. The axis of the guide rod 36 is parallel to the axis of the grinding head spindle 11. The industrial computer can control the air pressure of the cylinder 33 and then control the force of the piston rod of the cylinder 33, thereby realizing the adaptive adjustment of the grinding pressure of the combined grinding wheel. During the movement, the guide rod 36 slides up and down under the action of the guide hole of the limiting portion 37, and at the same time limits the piston rod of the cylinder 33 arranged on the cylinder connecting plate 35 to extend and retract along the guide. The two cylinders 33 are symmetrically distributed on both sides of the grinding head spindle 11 to prevent the combined grinding wheel from swinging left and right during the lifting and grinding process.

[0037] The present invention also provides a method for controlling the grinding pressure of a grinding assembly capable of measuring the grinding temperature in real time, comprising the following steps: S10 The user sets the upper limit of the working temperature, the safe use temperature and the safe grinding pressure of the grinding wheel 152 through an industrial computer. S20 Turn on the grinding assembly to grind the workpiece. When the temperature control device detects that the temperature of the grinding processing area of ​​the combined grinding wheel reaches the upper limit of the working temperature, the industrial computer controls the cylinder of the grinding control device to reduce the pressure applied to the workpiece. S30 When the temperature control device detects that the temperature of the grinding processing area of ​​the combined grinding wheel reaches the safe use temperature, the industrial computer controls the grinding control device to restore the safe grinding pressure between the combined grinding wheel and the workpiece, and continues to grind the workpiece to complete the processing task.

[0038] When the temperature control device detects that the temperature of the grinding processing area of ​​the combined grinding wheel reaches the upper limit of the working temperature, the industrial computer controls the air pressure in the cylinder 33 to decrease, thereby reducing the force on the piston rod of the cylinder 33, thereby reducing the pressure between the combined grinding wheel and the workpiece to be ground to a safe range.

[0039] When the temperature control device detects that the temperature of the grinding processing area of ​​the combined grinding wheel reaches the safe operating temperature, the industrial computer controls the air pressure in the cylinder 33 to increase, the piston rod of the cylinder 33 extends, and pushes the cylinder connecting plate 35 to move toward the direction close to the workpiece to be ground, thereby allowing the combined grinding wheel and the workpiece to be ground to restore the original safe grinding pressure to continue grinding.

[0040] The above description is only an exemplary embodiment of the present invention, and does not limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. A grinding component capable of measuring grinding temperature in real time, characterized in that: include: A grinding device, comprising a grinding head spindle, a motor pulley and a combined grinding wheel, wherein the grinding head spindle is connected to the motor pulley through a spline sleeve, and the combined grinding wheel is connected to the grinding head spindle through a spindle connecting plate; a temperature control device, comprising a temperature acquisition module and an industrial computer, wherein the temperature acquisition module is arranged between two adjacent grinding wheels of the combined grinding wheel, and the temperature acquisition module is connected to the industrial computer through a communication module; a grinding control device, comprising a grinding head frame, a sleeve and a cylinder, wherein the grinding head frame is located between the motor pulley and the combined grinding wheel, the grinding head frame is connected to the motor pulley through a flange, the sleeve is sleeved outside the grinding head spindle, the sleeve is connected to the grinding head spindle through a first rolling bearing, one end of the sleeve is extended and arranged between the grinding head frame and the grinding head spindle, the other end of the sleeve is arranged on a cylinder connecting plate, the free end of the piston rod of the cylinder is arranged on the cylinder connecting plate, the end of the cylinder away from the piston rod is arranged on the grinding head frame, and the cylinder is electrically connected to the industrial computer; The grinding device also includes an intermediate connecting plate, which is arranged on a side of the spindle connecting plate away from the motor pulley through a spring buffer structure, and the combined grinding wheel includes six grinding wheels arranged in a ring array; Each of the grinding wheels is arranged on the middle connecting plate through a grinding wheel fixing block, and a baffle is arranged on the outer side wall of the grinding wheel fixing block; The temperature acquisition module includes a thermocouple wire, a thermocouple amplifier, the communication module, a single-chip microcomputer and a wireless power supply module. The thermocouple wire is arranged on two adjacent grinding wheel fixing blocks through a temperature transfer fixing block. The thermocouple wire is located between two adjacent grinding wheels. The thermocouple amplifier, the communication module, the single-chip microcomputer and the wireless power supply module are arranged on the middle connection plate through a bottom plate. The thermocouple amplifier is electrically connected to the thermocouple wire and the single-chip microcomputer. The single-chip microcomputer is connected to the industrial computer through the communication module. The wireless power supply module provides power for the thermocouple amplifier, the communication module and the single-chip microcomputer. The industrial computer is electrically connected to the cylinder. The bottom plate is located in a circular area composed of grinding wheels arranged in a ring array. The temperature transfer fixed block is arranged on the grinding wheel fixed block through a fixed base, the temperature transfer fixed block is provided with a square hole, two thermocouple wires are arranged in each of the square holes, a heat insulation layer is arranged between adjacent thermocouple wires, and a heat insulation layer is arranged between the thermocouple wires and the inner wall of the square hole; The grinding control device also includes at least two guide rods, both ends of the guide rods are provided with external threads, the outer wall of the grinding head frame is provided with a limit portion, the limit portion is provided with a guide hole, one end of the guide rod is connected to the cylinder connecting plate, the other end of the guide rod is passed through the guide hole to provide a limit nut, and the axis of the guide rod is parallel to the axis of the grinding head spindle.

2. The grinding component capable of measuring grinding temperature in real time according to claim 1, characterized in that: The axis of the square hole is parallel to the axis of the grinding head spindle, and the heat insulation layer is a mica sheet.

3. The grinding component capable of measuring grinding temperature in real time according to claim 1, characterized in that: The communication module is a Bluetooth communication module.

4. The grinding component capable of measuring grinding temperature in real time according to claim 1, characterized in that: The first rolling bearing includes an inner ring, an outer ring and a rolling body sandwiched between the inner ring and the outer ring. The inner ring is arranged on the grinding head main shaft, the outer ring is arranged on the cylinder connecting plate, a retaining ring is arranged on the grinding head main shaft, and the inner ring is located between the retaining ring and the cylinder connecting plate.

5. The grinding pressure control method of a grinding component capable of measuring grinding temperature in real time according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: S10, a user sets the upper limit of the working temperature, the safe use temperature and the safe grinding pressure of the grinding wheel through an industrial computer; S20, the grinding assembly is turned on to grind the workpiece, and when the temperature control device detects that the temperature of the grinding processing area of ​​the combined grinding wheel reaches the upper limit of the working temperature, the industrial computer controls the cylinder of the grinding control device to reduce the pressure applied to the workpiece; S30, when the temperature control device detects that the temperature of the grinding processing area of ​​the combined grinding wheel reaches the safe use temperature, the industrial computer controls the grinding control device to restore the grinding pressure between the combined grinding wheel and the workpiece, and continues to grind the workpiece to complete the processing task.

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