Automatic polishing tool setting method, system and device

Abstract

An automatic polishing tool setting method, system and device relate to the technical field of optical numerical control polishing equipment. When using a soft polishing tool to polish an optical lens, the system can compensate for the deformation of the polishing tool to ensure the grinding accuracy. The system comprises a machine tool body, the top of which is slidably connected to a base, wherein a mounting seat is fixedly provided on the base, a mounting plate is rotatably connected to the mounting seat, a tool driving device is fixedly provided on the mounting plate, the bottom of the tool driving device is detachably connected to the polishing tool, and a contact sensor is provided on one side of the top of the mounting plate. A workpiece mounting portion and a weight sensor are also provided on the machine tool body, wherein the weight sensor and the workpiece mounting portion can be raised and lowered in the plane where the polishing tool is located. The present solution also provides a polishing tool setting method. The use of the above-mentioned tool setting device for tool setting can make the polishing accuracy of optical elements higher.

Description

Technical Field

[0001] The present invention relates to the technical field of optical numerical control polishing equipment, and in particular to an automatic polishing tool setting method, system and device. Background Art

[0002] Optical polishing technology is primarily used in the manufacture of high-precision optical components, such as telescope lenses, laser reflective lenses, and photolithography lenses. The required surface roughness must reach nanometer or even sub-nanometer levels. It is also used in other lenses, such as eyeglass lenses. There are many methods for achieving ultra-fine polishing, the more mainstream of which include small-head polishing, stress disk polishing, magnetorheological polishing, ion beam polishing, airbag polishing, chemical mechanical polishing, and magnetic jet polishing.

[0003] In optical lens processing, polishing heads are primarily of two types: soft and hard. Soft polishing heads are made from materials such as rubber, polyurethane, or other modified polymers, while hard polishing heads are made from materials such as zirconium oxide, diamond, and nitrided metals. Soft polishing heads offer excellent surface adhesion and minimal damage to the workpiece. However, due to their significant deformation during use, tool setting and compensation are required before each operation to ensure consistent polishing accuracy and force. Existing automatic tool setting systems are primarily designed for hard grinding heads and cannot meet the requirements of soft polishing heads (polishing tools). Summary of the Invention

[0004] 1. Technical Problems Solved

[0005] In response to the deficiencies of the prior art, the present invention proposes a polishing tool control method, which can compensate for the deformation of the polishing tool while ensuring basically consistent polishing force when using a soft polishing tool for polishing optical lenses, thereby ensuring polishing accuracy and polishing consistency.

[0006] 2. Specific technical solutions

[0007] A polishing tool setting control method comprises the following steps:

[0008] S1. Mounting a polishing tool on a tool drive device of a polishing device, wherein the tool drive device is mounted on a mounting plate of a mounting seat, the mounting seat is movable horizontally above the polishing device, and the mounting plate is rotatably connected to the mounting seat; wherein a workpiece mounting portion of the polishing device is movable upward and downward;

[0009] S2. Align the polishing tool with the workpiece mounting portion, then horizontally move the mounting base to one side of the polishing device, raise the weight sensor at a set speed until the weight sensor contacts the polishing tool and the weight sensor reads the set value, and record the height parameter of the weight sensor at this time. The length of the polishing tool can be obtained based on the height parameter;

[0010] S3. The mounting base is reset to the position directly above the workpiece mounting portion. The mounting plate is then rotated so that the contact sensor on the side of the mounting base is aligned with the workpiece mounting portion. The workpiece mounting portion is raised so that it contacts the contact sensor. The height parameters of the workpiece mounting portion at this time are recorded, and the height value of the workpiece is obtained by calculation.

[0011] S4. Move the mounting seat so that the polishing tool is located directly above the workpiece mounting portion; the control system calculates based on the workpiece height value and the polishing tool length value, and controls the workpiece mounting portion to rise so that the height of the workpiece mounting portion reaches a machinable height.

[0012] Implementation principle and working principle:

[0013] Step S1 of this solution is the assembly of the corresponding polishing device, in which the mounting seat can drive the polishing tool to move horizontally, and the workpiece can be polished horizontally. The workpiece mounting part can be raised and lowered, and the polishing force of the workpiece can be adjusted by adjusting the height of the workpiece mounting part, which is more functional; the rotation of the mounting plate can drive the polishing tool to adjust the angle, thereby better completing the workpiece polishing. In step S2, the polishing tool is moved and the weight sensor is raised to contact it, and the height parameter of the weight sensor is recorded when the reading of the weight sensor reaches the set value. The beneficial effect of this step is to calculate the extrusion or force when the polishing tool is deformed by the height value corresponding to the reading, so as to facilitate the compensation of the deformation to the actual workpiece processing process, thereby improving the polishing accuracy and consistency of the workpiece; in step S3, by rotating the mounting plate, the contact sensor at one end of the top of the mounting plate is respectively abutted against the workpiece mounting portion and the workpiece on the workpiece mounting portion, and the thickness of the workpiece can be obtained by the difference; in step S4, the mounting plate is reset, and then the control system compensates the workpiece thickness and the length data of the deformed polishing tool, and then the workpiece is processed. This step makes the polishing and grinding accuracy of the workpiece better; at the same time, in this solution, the contact sensor is set on the mounting plate, which can not only realize the measurement of the workpiece height by rotating the mounting plate, but also facilitate the polishing of the workpiece by the polishing head at different angles. At the same time, the position of the contact sensor will not be affected by polishing debris, while ensuring the polishing accuracy, without the need for other positions or structures to measure the component height, and the integration is higher.

[0014] Preferably, in step S3, the initial point calibration is completed first, and the contact point between the polishing tool and the workpiece mounting portion is determined by camera measurement or feeler measurement, and the height of the workpiece mounting portion at this time is used as the Z 标准 , that is, the actual 0 point of the workpiece on the Z axis; the height when the contact sensor contacts the workpiece mounting portion is the Z 探标准, used to calculate the actual thickness of the workpiece; the preferred advantageous effect is that the initial point is calibrated by camera measurement or feeler gauge, so that the accuracy of the initial point is higher, and the height or height difference when the probe and the workpiece mounting portion are in contact is used to determine the component height, which is simple and convenient.

[0015] Preferably, in step S2, the height parameter of the calibrated weight sensor and the polishing tool reaching the set value is used as W 标准 , where W 标准 The polishing tool 0 point is used for calibration reference. When replacing different polishing tools or workpieces, the control system calculates by the following formula: Z 实际 =Z 标准 +(W 实际 -W 标准 )+(Z 探实际 -Z 探标准 After calculation, the Z actual coordinate value is obtained, where Z actual represents the actual coordinate value of the Z axis after the tool setting is completed. 标准 W is the Z-axis coordinate 0 point after calibration; 标准 The W-axis coordinate 0 point when calibrating the reference, Z 探实际 Z is the Z-axis coordinate value during tool setting. 探标准 The coordinate 0 point of the Z-axis probe during calibration, where the W axis is the axis where the weight sensor is located, and the Z axis is the axis where the workpiece mounting part is located.

[0016] Preferably, in step S2, a protection value needs to be set when the weight sensor rises. When the height of the weight sensor is lower than the protection value, the rising speed of the weight sensor is 950-1100 mm / min. When it is within the protection value, the rising speed of the weight sensor is 15-25 mm / min. The beneficial effect of this preferred embodiment is that, by setting the protection value, it is possible to ensure the tool setting speed and avoid hard contact between the polishing tool and the weight sensor, which affects the detection accuracy.

[0017] Preferably, the polishing tool is selected from one of a sponge ball grinding head, a rubber grinding head and a polyester fiber grinding head, and the reading setting value of the weight sensor is 0.05~0.1g; the beneficial effect of this preference is: the use of a sponge ball grinding head can avoid component damage while meeting the polishing accuracy, and the reading setting value of the weight sensor is 0.05~0.1g, which meets the deformation of the polishing tool and uses the deformation as the accuracy compensation during polishing, and the polishing consistency is better.

[0018] This solution also provides a polishing tool setting control system, which applies the above-mentioned polishing tool setting control method to perform tool setting before polishing a workpiece, including a control module, a sensor detection module and an action module electrically connected to each other;

[0019] The sensing detection module includes a position sensing unit, an angle sensing unit, a weight sensor, a first height detection unit and a second height detection unit;

[0020] The action module includes a lifting drive unit of the weight sensor, a sliding drive unit of the mounting seat, a rotation drive unit of the mounting plate, and a lifting drive mechanism of the workpiece mounting portion;

[0021] The position sensing unit is used to locate the position of the mounting seat, the angle sensing unit is used to detect the rotation angle of the mounting plate, the weight sensor is used to detect the interaction force between the polishing tool and the weight sensor, the first height detection unit is used to detect the height of the weight sensor, and the second height detection unit is used to detect the height of the workpiece mounting portion;

[0022] The control module is used to drive the action module to operate according to the detection signal transmitted by the sensor detection module.

[0023] The present solution provides a polishing tool setting device, which adopts the above-mentioned automatic tool setting method for tool setting, including a machine tool body, the top of the machine tool body is slidably connected to a base, wherein a mounting seat is fixedly provided on the base, and a mounting plate is rotatably connected to the mounting seat, and a tool driving device is fixedly provided on the mounting plate, the bottom of the tool driving device is detachably connected to a polishing tool, and a contact sensor is provided on one side of the top of the mounting plate; a workpiece mounting portion and a weight sensor are also provided on the machine tool body, wherein the weight sensor and the workpiece mounting portion can be raised and lowered in the plane where the polishing tool is located.

[0024] In the polishing tool setting device of this scheme, a weighing sensor is used to abut against the polishing tool, and the detection value of the weighing sensor can be used as compensation for the deformation of the polishing tool during polishing, which can well ensure that the workpiece after polishing is more accurate and has better consistency; the thickness of the component is detected by the contact sensor on the mounting plate. This structure does not require an additional mounting structure, has a higher degree of integration, and is also simple and convenient for tool setting; specifically, the polishing tool can slide laterally above the machine tool body together with the base. At the same time, the polishing tool can rotate on the mounting plate, and can complete polishing at different angles, which is more powerful.

[0025] Preferably, the contact sensor is arranged obliquely on the side of the mounting plate close to the weight sensor, and the angle formed between the probe end of the contact sensor and the polishing tool is 45°; the beneficial effect of this preferred embodiment is that, through the setting of the angle, the diagonal line of the mounting plate can be used as part of the length of the contact sensor, and when performing component detection, the movement of the component mounting part is smaller, which is simpler and more convenient.

[0026] Preferably, the machine tool body includes a base plate, and a first mounting hole and a second mounting hole are provided on the base plate; a guide rail and a lead screw slide matched with the guide rail are vertically arranged on the machine tool body, and the workpiece mounting part is fixedly arranged on the slide of the first lead screw slide, and the workpiece mounting part also includes a first drive motor, and the first drive motor drives the workpiece mounting part to rise and fall in the first mounting hole; a telescopic sealing sleeve is also provided on the edge of the first mounting hole and the edge of the top of the workpiece mounting part; the weight sensor is arranged on the mounting rod, and a second lead screw slide is provided at the bottom of the mounting rod, and the slide of the second lead screw slide is fixedly connected to the bottom of the mounting rod, and the lead screw of the second lead screw slide A second drive motor is connected to the end of the rod, and the second drive motor drives the mounting rod to rise and fall in the second mounting hole; a sealing plate and a third drive motor are provided on the opening side of the second mounting hole, and the output end of the third drive motor is connected to the edge of the sealing plate and can drive the sealing plate to rotate to achieve the sealing of the second mounting hole; the beneficial effect of this preferred embodiment is that the installation of the workpiece mounting part and the weight sensor is facilitated by the arrangement of the base plate and the first mounting hole and the second mounting hole thereon, and at the same time, the arrangement of the telescopic sealing sleeve and the sealing plate can avoid the debris generated during polishing from affecting the components inside that drive the workpiece mounting part and the weight sensor to rise and fall, and the service life is longer, so that the accuracy can be maintained and guaranteed all the time.

[0027] Preferably, it also includes a control unit and a data acquisition unit, and the data acquisition unit is electrically connected to the first drive motor, the second drive motor, the contact sensor and the weight sensor respectively; the control unit controls the first drive motor, the second drive motor, the third drive motor and the tool drive device according to the electrical signals collected by the data acquisition unit.

[0028] Preferably, the polishing tool includes a connecting seat, and the connecting seat includes a first connecting end and a second connecting end arranged opposite to each other; the first connecting end and the second connecting end are both hollow structures, a polishing head is provided at the second connecting end, and an electrically connected pressure sensing unit and a warning light are also provided inside the second connecting end; an observation port is provided on the outside of the second connecting end; the observation port is arranged opposite to the warning light; a power supply unit is provided on the inside of the first connecting end, and the power supply unit is electrically connected to the pressure sensing unit and the warning light respectively; an observation window is provided on the outside of the observation port, and the observation window covers a circle around the observation port.

[0029] The beneficial effects of this program are:

[0030] When using soft polishing tools for polishing, this solution uses a weight sensor to compensate for the accuracy of polishing deformation, and then uses a contact sensor to measure the thickness of the component, making the tool setting faster, and each polishing will be more consistent and accurate.

[0031] In this solution, the base plate and the first mounting hole and the second mounting hole thereon are provided to facilitate the installation of the workpiece mounting part and the weight sensor. At the same time, the provision of the telescopic sealing sleeve and the blocking plate can prevent the debris generated during polishing from affecting the components inside that drive the workpiece mounting part and the weight sensor to rise and fall, thereby extending the service life and ensuring that the accuracy can be maintained and guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the axial side of the polishing tool setting device of the present invention without a base plate.

[0033] Figure 2 This is a front view of the polishing tool setting device of the present invention with a base plate.

[0034] Figure 3 This is a schematic diagram of the polishing tool structure of the polishing tool setting device of the present invention.

[0035] Figure 4 This is a control logic diagram of the polishing tool setting system of the present invention.

[0036] Description of reference numerals:

[0037] Machine tool body 1, base 2, mounting seat 3, mounting plate 4, tool drive device 5, polishing tool 6, contact sensor 7, workpiece mounting part 8, weight sensor 9, base plate 10, first mounting hole 11, second mounting hole 12, guide rail 13, first screw slide 14, first drive motor 15, telescopic sealing sleeve 16, mounting rod 17, second screw slide 18, blocking plate 19, third drive motor 20, connecting seat 21, first connecting end 22, second connecting end 23, polishing head 24, pressure sensing unit 25, warning light 26, observation port 27, power supply unit 28, observation window 29. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings to make the advantages and features of the present invention easier for those skilled in the art to understand, thereby making a clearer and more precise definition of the scope of protection of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] like Figure 1-4 As shown:

[0040] A polishing tool setting device is used for optical lens processing (polishing and grinding), including a machine tool body 1, a slide rail is installed on the top of the machine tool body 1, wherein a base 2 is slidably connected to the slide rail, and a base drive motor (a servo motor or a stepper motor) is provided on the base 2 to drive the base 2 to slide on the slide rail of the machine tool body 1; a mounting seat 3 is fixed on the base 2 by bolts, and the front end of the mounting seat 3 is rotatably connected to the mounting plate 4, and the mounting plate 4 is driven by the rotating motor on the mounting seat 3. When the rotating motor is implemented, it can be a stepper motor or a servo motor, and the rotation angle control of the mounting plate 4 can be completed by controlling the rotating motor; specifically, a tool driving device 5 is installed on the mounting plate 4 by bolts, screws, etc., so that the tool driving device 5 and the polishing tool 6 thereon can be driven to rotate by rotating the mounting plate 4.

[0041] During specific implementation, the tool driving device 5 includes a polishing motor for driving the polishing tool 6 to rotate; specifically, the polishing tool 6 rotates in the tool driving device 5 under the drive of the polishing motor to realize workpiece polishing; a contact sensor 7 is installed on the left side of the top of the mounting plate 4, wherein the contact sensor 7 can be specifically a proximity switch; a workpiece mounting part 8 and a weight sensor 9 are respectively installed on both sides of the front surface of the machine tool body 1. During specific implementation, the weight sensor 9 and the workpiece mounting part 8 are both in the same plane as the polishing tool 6, and the weight sensor 9 and the workpiece mounting part 8 can be raised and lowered on this plane.

[0042] Specifically, during actual installation, the contact sensor 7 is installed on the mounting plate 4 at an angle by means of bolts, specifically on the side close to the weight sensor 9. In specific implementation, when the polishing tool 6 is in a vertical state, the angle formed between the probe end (or detection end) of the contact sensor 7 and the polishing tool 6 is 45°.

[0043] During the specific implementation, that is, when the tool is specifically set, the base 2 is first driven to the corresponding position by the servo motor or stepper motor on the base 2, and then the weight sensor 9 is raised to abut against the polishing tool 6. When the weight sensor 9 reaches the preset parameters, the weight sensor 9 is stopped from rising, and the height of the weight sensor 9 at this time is recorded as the reference height of the length (height) of the polishing tool 6; then the base 2 is reset to directly above the workpiece mounting portion 8, and then the mounting plate 4 on the base 2 is rotated so that the contact sensor 7 on the mounting plate 4 abuts against it, and then the thickness of the optical element to be processed can be obtained by calculation. At this time, the processing accuracy can be ensured by compensating the thickness parameters of the optical element and the length (height) of the polishing tool.

[0044] When implementing it specifically, Figure 2A base plate 10 is fixedly provided at the front end of the machine tool body 1 by bolts. Specifically, a first mounting hole 11 and a second mounting hole 12 are sequentially opened on the base plate 10; wherein, the first mounting hole 11 and the second mounting hole 12 correspond to the top of the workpiece mounting portion 8 and the weight sensor 9 respectively; specifically, a guide rail 13 is installed at the first mounting hole 11 of the machine tool body 1, and a first screw slide 14 is provided on the guide rail 13 to cooperate with the guide rail 13, wherein the workpiece mounting portion 8 also includes a first drive motor 15, and the top of the workpiece mounting portion 8 is used for placing and mounting the workpiece, and the workpiece mounting portion 8 is fixedly provided on the slide of the first screw slide 14 by bolts, and the first drive motor 15 drives the workpiece mounting portion 8 to rise and fall in the first mounting hole 11; the advantage of such a setting is that, through the lifting and lowering adjustment of the workpiece mounting portion 8, it is convenient to complete the thickness measurement of the workpiece during tool setting, and then provide polishing data compensation for the polishing device, which is conducive to ensuring the polishing accuracy of the workpiece.

[0045] Furthermore, since debris will appear during grinding, in order to prevent the debris from affecting the first screw slide 14 and other components, a telescopic sealing sleeve 16 is provided at the edge of the top of the workpiece mounting portion 8. Specifically, the other end of the telescopic sealing sleeve 16 is fixed to the edge of the upper side of the first mounting hole 11. The advantage of this is that, through the provision of the telescopic sealing sleeve 16, it is possible to prevent debris from entering the lower part of the base plate 10 through the first mounting hole 11 and causing a malfunction. In specific implementation, a mounting rod 17 is provided at the second mounting hole 12, and a second screw slide 18 and a guide rail cooperating with the second screw slide 18 are provided at the bottom of the mounting rod 17. The screw end of the second screw slide 18 is connected to a second drive The third drive motor 20 is used to drive the second screw slide 18 to move up and down, and then the mounting rod 17 on the slide is driven up and down, and more importantly, the mounting rod 17 is driven to move up and down in the second mounting hole 12; in the specific implementation, in order to avoid the accumulation of debris on the weight sensor 9 during polishing, which affects the measurement and measurement accuracy of the polishing tool length, based on this, a third drive motor 20 is provided at the bottom of the opening side of the second mounting hole 12, and the output end of the third drive motor 20 is connected to a blocking plate 19 by bonding or threading, wherein the blocking plate 19 is located at the upper end of the second mounting hole 12, and the second mounting hole 12 can be blocked (completely covered) under the drive of the third drive motor 20.

[0046] The polishing tool 6 includes a connecting seat 21, wherein the connecting seat 21 is specifically two cylinders with different diameters formed as a coaxial unit, wherein the small diameter end of the connecting seat 21 is the first connecting end 22, and the large diameter end is the second connecting end 23. A polishing head 24 is provided at the opening of the second connecting end 23, wherein a positioning pin is provided on the outside of the polishing head 24, and the end of the positioning pin is threaded, so as to facilitate the fixation of the polishing head 24 by the positioning pin, and when the polishing head 24 is pushed upward after the fixation is completed, the polishing head can move upward along the positioning pin, and the setting of the positioning pin can make the rotation and polishing of the polishing head proceed smoothly; an electrically connected pressure sensing unit 25 and a warning light 26 are also provided in the hollow structure of the second connecting end 23. When the extrusion of the polishing head 24 exceeds the set value of the pressure sensing unit 25, the warning light 26 lights up and alarms; a return spring is provided between the pressure sensing unit 25 and the polishing head 24, and the return spring can not only transmit the pressure value to the pressure sensing unit 25, but also reset the polishing head 24 after polishing is completed; an observation port 27 is provided on the outside of the second connecting end 23; wherein the observation port 27 is arranged opposite to the warning light 26; a power supply unit 28 is provided on the inside of the first connecting end 22, and the power supply unit 28 is specifically a battery, and the power supply unit 28 is electrically connected to the pressure sensing unit 25 and the warning light 26 respectively; an observation window 29 is provided on the outside of the observation port 27, and the material of the observation window 29 can be selected from acrylic. The observation window 29 covers a circle of the observation port 27, and a sealing ring is also provided between the observation window 29 and the second connecting end 23, so as to prevent debris from entering during polishing.

[0047] A polishing tool setting control method, which uses the above-mentioned polishing tool setting device to implement the above-mentioned tool setting, comprises the following steps:

[0048] S1. Install the polishing tool 6 onto the tool drive device 5. In specific implementation, the tool drive device 5 is fixed to the mounting plate 4 of the mounting seat 3 with bolts, wherein the rotating motor on the mounting seat 3 can drive the mounting plate 4 to rotate according to the control program (i.e., the setting); at the same time, since the mounting seat 3 can move horizontally on the upper side of the machine tool body 1, wherein the mounting seat 3 is fixedly mounted on the base 2 and is driven by the base drive motor to slide on the slide rail on the machine tool body 1, the workpiece mounting portion 8 of the polishing device can be raised and lowered on the machine tool body 1;

[0049] S2. First, make the polishing tool 6 and the workpiece mounting portion 8 face each other, specifically, be located in the same vertical plane and on the same axis, then move the mounting base 3 horizontally to one side of the polishing device, specifically to just above the weight sensor 9, then raise the weight sensor 9 at a set speed, so that the weight sensor 9 contacts the polishing tool, and it is necessary to make the reading of the weight sensor 9 reach the set value, record the height parameter of the weight sensor 9 at this time (the height parameter of the raising), and the length value of the polishing tool can be calculated based on the height parameter, and the length value is the length value that can ensure the polishing accuracy when the polishing deformation occurs;

[0050] Specifically, the blade of the polishing tool 6 is selected from one of a sponge ball grinding head, a rubber grinding head and a polyester fiber grinding head. The reading setting value of the weight sensor 9 is 0.05~0.1g. The weight value is set as the value of the deformation of the blade during polishing. This parameter can correspond to the rising height of the weight sensor 9. The rising height can be used as the length compensation of the polishing tool 6, which can effectively ensure the accuracy of each polishing. It should be noted that when the polishing tool is grinding, due to the difference in the material of each blade, the interaction force corresponding to the polishing accuracy is also different, and then the deformation of the polishing blade will also be different. This solution can better complete the length compensation of the polishing tool 6 with higher accuracy through the cooperation of the pressure sensing unit 25 inside the polishing tool 6 and the weight sensor 9.

[0051] In step S2, the weight sensor 9 is also provided with a protection value when it rises. In the present embodiment, the distance between the weight sensor 9 and the polishing head 24 is less than 1 to 3 mm as a protection value. A distance measuring sensor can be provided on one side of the weight sensor 9 for detection. When the height of the weight sensor 9 is lower than the protection value, the rising speed of the weight sensor 9 is 950 to 1100 mm / min, preferably 980 mm / min in specific implementation. When the protection value is reached, the rising speed of the weight sensor 9 drops to 15 to 25 mm / min, preferably 20 mm / min in this embodiment. The advantage of this is that it can not only ensure the tool setting speed, but also avoid hard contact between the polishing tool 6 and the weight sensor 9, which affects the detection accuracy.

[0052] Further, S3, the mounting base 3 is then reset to just above the workpiece mounting portion 8, and the mounting plate 4 on the mounting base 3 is then rotated so that the contact sensor 7 on one side of the top of the mounting plate 4 corresponds to the workpiece mounting portion 8, and the workpiece mounting portion 8 is raised so that it contacts the contact sensor 7, and the height parameters of the workpiece mounting portion 8 at this time are recorded, and the height value of the workpiece is obtained by calculation;

[0053] S4. Move the mounting base 3 so that the polishing tool 6 is located directly above the workpiece mounting portion 8; the control system calculates based on the workpiece height value and the length value of the polishing tool 6, and controls the workpiece mounting portion 8 to rise so that the height of the workpiece mounting portion reaches a height that can be accurately processed.

[0054] When conducting the test, the process is as follows:

[0055] First complete the initial point calibration, determine the contact point between the polishing tool and the workpiece mounting part by camera measurement or feeler gauge measurement, and calibrate the workpiece mounting part at this time as Z 标准 , and record it as the actual Z-axis 0 point; calibrate the weighing sensor to weigh the W-axis value (W 标准 ) is recorded as the actual "0" point of the workpiece W axis; calibrate the wired probe to measure the Z axis value (Z 探标准 ) is recorded as the actual height value "0" point of the product;

[0056] Then, when the knife length and product height are changed, the measured values ​​of the weight sensor and the contact sensor 7 will differ from the calibrated standard values ​​of the contact. The program calculates the formula Z 实际 =Z 标准 +(W 实际 -W 标准 )+(Z 探实际 -Z 探标准 ) value, get the actual Z coordinate value, because Z has been assigned 标准 The actual "0" point of the workpiece Z axis, that is, at this time (W 实际 -W 标准 )+(Z 探实际 -Z 探标准 ) is the distance the Z axis needs to move relative to the actual "0" point of the workpiece; specifically, Z 实际 : The actual machine coordinate value of the Z axis after automatic tool setting is completed; Z 标准 When calibrating the reference, the Z-axis machine tool coordinate value when just touching is calibrated as the "0" point of the Z-axis workpiece coordinate system; W 实际 : W-axis machine tool coordinate value measured by the weighing sensor; this value can reflect the length of the polishing tool; W 标准 : The W-axis machine tool coordinate value measured during the calibration reference is calibrated as the "0" point of the W-axis workpiece coordinate system; Z 探实际 : Z-axis machine tool coordinate value measured by wired probe; Z 探标准 : The Z-axis machine coordinate value measured during the calibration benchmark is calibrated as the "0" point of the Z-axis probe workpiece coordinate system.

[0057] This solution also provides a polishing tool setting control system, which is loaded in the polishing tool setting device and is also adapted to the polishing tool setting control method, including a control module, a sensor detection module and an action module electrically connected to each other; in specific implementation, the control module is specifically a microprocessor or a microcontroller,

[0058] Among them, the control module adopts a microcontroller, and its sensing detection module mainly includes a position sensing unit, an angle sensing unit, a weight sensor, a first height detection unit and a second height detection unit; specifically, the position sensing unit in this solution is specifically a proximity switch, which is installed on the machine tool body 1, and its main positioning position is directly above the weight sensor 9 and directly above the workpiece mounting seat 3, which is convenient for positioning the mounting seat 3 and thus ensuring smooth tool setting; the angle sensing unit in this embodiment is specifically a Hall sensor installed on the stator of the rotating motor, or it can be a rotary encoder installed at the rear end of the motor shaft of the rotating motor, which can simply and conveniently complete the rotation angle detection of the mounting plate 4, and also detect the angular velocity and total rotation angle of the rotating motor on the mounting plate 4; wherein, the weight sensor 9 is used to detect the relative position between the polishing tool 6 and the weight sensor 9. Interaction force, thereby ensuring the consistency of polishing of the processed parts, wherein the first height detection unit is used to detect the height of the weight sensor, and the second height detection unit is used to detect the height of the workpiece mounting portion 8. Specifically, the first height detection unit and the second height detection unit are both encoders, which are used for motion detection of the action module; during specific operations, the length of the polishing tool 6 will be different, and the density or elasticity of the polishing head 24 in the polishing tool 6 is also different, and the deformation of the polishing head 24 is inseparable from the force. The first height detection unit can be used to unify the polishing force during polishing, and the value detected by it can compensate for the influence of the material and length of the polishing tool; the second height detection unit can be used to compensate for components of different thicknesses or when there is a thickness difference between components, to ensure consistent polishing force and thus ensure consistency in polishing accuracy.

[0059] In a specific implementation, the action module includes a lifting drive unit of the weight sensor, which is a second drive motor. The drive motor drives the mounting rod 17 to move up and down on the second screw slide 18; wherein, the control module collects the height value of the weight sensor 9 on the mounting rod 17 according to the first height detection unit,

[0060] Specifically, the second drive motor is a servo motor, and the first height detection unit is an encoder, which is installed at the shaft end of the servo motor. The rotation measurement of the servo motor can be converted into the height increase of the mounting rod 17 on the second screw slide 18, so as to better compensate for the lifting and lowering of the workpiece mounting portion 8;

[0061] The lifting drive mechanism for the workpiece mounting portion 8 is specifically a first drive motor 15. The control module controls the rotation of the first drive motor 15 and the lifting and lowering of the workpiece mounting portion 8 based on the height increase. The first drive motor 15 is also a servo motor, and the second height detection unit is an encoder mounted on the shaft end of the servo motor. The sliding drive unit of the mounting seat is specifically a base drive motor, and the control signal of this drive motor is generated by the control module based on the electrical signal of the proximity switch. The rotation drive unit of the mounting plate is specifically a rotary motor. The lifting drive mechanism for the workpiece mounting portion is the first drive motor. The control module drives the lifting and lowering of the workpiece mounting portion and the rotation of the rotary motor based on the compensation value and the set value, thereby achieving compensation for different tools and components, and ensuring the consistency and accuracy of component grinding.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims

1. A polishing tool setting control method, characterized in that: The following steps are involved: S1. Mounting a polishing tool on a tool drive device of a polishing device, wherein the tool drive device is mounted on a mounting plate of a mounting seat, the mounting seat is movable horizontally on an upper side of the polishing device, and the mounting plate is rotatable on the mounting seat; wherein a workpiece mounting portion of the polishing device is movable; S2. Align the polishing tool with the workpiece mounting portion, then horizontally move the mounting base to one side of the polishing device, raise the weight sensor at a set speed until the weight sensor contacts the polishing tool and the weight sensor reading reaches the set value, and record the height parameter of the weight sensor at this time. The length value of the polishing tool can be obtained based on the height parameter; S3. The mounting base is reset to the position directly above the workpiece mounting portion. The mounting plate is then rotated so that the contact sensor on the side of the mounting plate is aligned with the workpiece mounting portion. The workpiece mounting portion is raised so that it contacts the contact sensor. The height parameters of the workpiece mounting portion at this time are recorded. The height value of the workpiece can be obtained by calculation. S4. Move the mounting seat so that the polishing tool is located directly above the workpiece mounting portion; the control system calculates based on the workpiece height value and the polishing tool length value, and then controls the workpiece mounting portion to rise according to the calculated parameters, so that the height of the workpiece mounting portion reaches the height at which the workpiece can be processed.

2. The polishing tool setting control method according to claim 1, characterized in that: In step S3, the initial point calibration is completed first, and the contact point between the polishing tool and the workpiece mounting portion is determined by camera measurement or feeler measurement, and the height of the workpiece mounting portion at this time is used as the Z 标准 , that is, the actual 0 point of the workpiece on the Z axis; the height when the contact sensor contacts the workpiece mounting portion is the Z 探标准 , used to calculate the actual thickness of the workpiece.

3. The polishing tool setting control method according to claim 2, characterized in that: In step S2, the height parameter of the weight sensor and the polishing tool reaching the set value is calibrated as W 标准 , where W 标准 The polishing tool 0 point is used for calibration reference. When changing different polishing tools or workpieces, the control system calculates by the following formula: Z 实际 =Z 标准 +(W 实际 -W 标准 )+(Z 探实际 -Z 探标准 After calculation, the Z actual coordinate value is obtained, where Z actual represents the actual coordinate value of the Z axis after the tool setting is completed. 标准 W is the Z-axis coordinate 0 point after calibration; 标准 The W-axis coordinate 0 point when calibrating the reference, Z 探实际 Z is the Z-axis coordinate value during tool setting. 探标准 The coordinate 0 point of the Z-axis probe during calibration, where the W axis is the axis where the weight sensor is located, and the Z axis is the axis where the workpiece mounting part is located.

4. The polishing tool setting control method according to claim 1, characterized in that: In step S2, a protection value needs to be set when the weight sensor rises. When the height of the weight sensor is lower than the protection value, the rising speed of the weight sensor is 950-1100 mm / min. When it is within the protection value, the rising speed of the weight sensor is 15-25 mm / min.

5. The polishing tool setting control method according to claim 1, characterized in that: The polishing head of the polishing tool is selected from one of a sponge ball grinding head, a rubber grinding head and a polyester fiber grinding head, and the reading setting value of the weight sensor is 0.05-0.1g.

6. A polishing tool setting control system, applied to the polishing tool setting control method according to any one of claims 1 to 5, characterized in that: It includes a control module, a sensor detection module and an action module that are electrically connected to each other; The sensing detection module includes a position sensing unit, an angle sensing unit, a weight sensor, a first height detection unit and a second height detection unit; The action module includes a lifting drive unit of the weight sensor, a sliding drive unit of the mounting seat, a rotation drive unit of the mounting plate, and a lifting drive mechanism of the workpiece mounting portion; The position sensing unit is used to locate the position of the mounting seat, the angle sensing unit is used to detect the rotation angle of the mounting plate, the weight sensor is used to detect the interaction force between the polishing tool and the weight sensor, the first height detection unit is used to detect the height of the weight sensor, and the second height detection unit is used to detect the height of the workpiece mounting portion; The control module is used to drive the action module to operate according to the detection signal transmitted by the sensor detection module.

7. A polishing tool setting device, characterized in that: The polishing tool setting control system according to claim 6 also includes a machine tool body (1), wherein the top of the machine tool body (1) is slidably connected to a base (2), wherein a mounting seat (3) is fixedly provided on the base (2), a mounting plate (4) is rotatably connected to the mounting seat (3), a tool driving device (5) is fixedly provided on the mounting plate (4), the bottom of the tool driving device (5) is detachably connected to a polishing tool (6), and a contact sensor (7) is provided on one side of the top of the mounting plate (4); a workpiece mounting portion (8) and a weight sensor (9) are also provided on the machine tool body (1), wherein the weight sensor (9) and the workpiece mounting portion (8) can both be raised and lowered in the plane where the polishing tool (6) is located.

8. The polishing tool setting device according to claim 7, characterized in that: The contact sensor (7) is arranged obliquely on a side of the mounting plate (4) close to the weight sensor (9), and the angle formed between the probe end of the contact sensor (7) and the polishing tool (6) is 45°.

9. The polishing tool setting device according to claim 7, characterized in that: The machine tool body (1) includes a base plate (10), and a first mounting hole (11) and a second mounting hole (12) are provided on the base plate (10); a guide rail (13) is provided vertically on the machine tool body (1), and a first screw slide (14) matched with the guide rail (13) is provided on the guide rail (13); the workpiece mounting portion (8) is fixedly arranged on the slide of the first screw slide (14), and the workpiece mounting portion (8) also includes a first drive motor (15), and the first drive motor (15) drives the workpiece mounting portion (8) to rise and fall in the first mounting hole (11); a telescopic sealing sleeve ( 16); the weight sensor (9) is arranged on the mounting rod (17); a second screw slide (18) is arranged at the bottom of the mounting rod (17); the slide of the second screw slide (18) is fixedly connected to the bottom of the mounting rod (17); the screw end of the second screw slide (18) is connected to a second drive motor, and the second drive motor drives the mounting rod (17) to rise and fall in the second mounting hole (12); a blocking plate (19) and a third drive motor (20) are arranged on the opening side of the second mounting hole (12); the output end of the third drive motor (20) is connected to the edge of the blocking plate (19) and can drive the blocking plate (19) to rotate to achieve blocking of the second mounting hole (12).

10. The polishing tool setting device according to claim 7, characterized in that: The polishing tool (6) includes a connecting seat (21), and the connecting seat (21) includes a first connecting end (22) and a second connecting end (23) arranged opposite to each other; the first connecting end (22) and the second connecting end (23) are both hollow structures, a polishing head (24) is arranged at the end of the second connecting end (23), and an electrically connected pressure sensing unit (25) and a warning light (26) are arranged inside the second connecting end (23); an observation port (27) is arranged outside the second connecting end (23); the observation port (27) and the warning light (26) are arranged opposite to each other; a power supply unit (28) is arranged inside the first connecting end (22), and the power supply unit (28) is electrically connected to the pressure sensing unit (25) and the warning light (26) respectively; an observation window (29) is arranged outside the observation port (27), and the observation window (29) covers a circle around the observation port (27).

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