Circular ring adaptive thickness running-in device

Abstract

The invention relates to a circular ring self-adaption thickness running-in device which comprises a distance detection assembly, a grinding wheel, a control panel, a motor and a sliding table. The sliding table is used for horizontally clamping the ring, the lower surface of the ring is completely exposed, and the motor rotates forwards and backwards to control the sliding table to drive the ring to move up and down; when the lower surface of the circular ring abuts against the upper surface of the grinding wheel, the upper surface of the grinding wheel is in running fit with the lower surface of the circular ring, so that the thickness of the circular ring is reduced. The distance detection assembly is located above the circular ring and used for measuring the distance H1 between the distance detection assembly and the upper surface of the circular ring and the distance H2 between the distance detection assembly and the upper surface of the grinding wheel, the thickness of the circular ring is H2-H1 in the running-in process, and the distance detection assembly outputs two corresponding distance signals in real time; the target signal is the required circular ring thickness, and the control panel is used for receiving and processing the distance signal and the target signal and controlling the motor to rotate. According to the invention, the running-in precision is improved, the product rejection rate is greatly reduced, and the labor cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a circular ring self-adaptive thickness running-in device. Background Art

[0002] The rotary transformer plays a vital role in automatic control and is widely used in various industries. The rotary transformer used in a large-scale product needs to be equipped with an additional receiving ring, which is placed between the two bearings of the rotor. The thickness of this receiving ring is required to be 4mm, but the machining accuracy cannot meet this requirement, and it usually exceeds 4mm. If the receiving ring that does not meet the requirements after machining is directly installed between the two bearings, the bearings are too tight, the friction is too large, and the rotor cannot rotate or rotates insensitively. The current solution is for workers to manually run-in. The problems with this method are: 1) It is very time-consuming to disassemble and test repeatedly; 2) The manual method still cannot meet the accuracy requirements; 3) The thickness after grinding is less than 4mm, which will cause the receiving ring to be scrapped. Summary of the invention

[0003] In view of this, the present invention provides a circular ring adaptive thickness running-in device, which improves the running-in accuracy, greatly reduces the product scrap rate, and saves labor costs.

[0004] The present invention is realized by the following technical scheme: a circular ring self-adaptive thickness grinding device, comprising a distance detection component, a grinding wheel, a control panel, a motor and a slide; the slide is used to horizontally clamp the circular ring, the lower surface of the circular ring is completely exposed, and the motor controls the slide to drive the circular ring to move up and down by forward and reverse rotation; the grinding wheel is located directly below the circular ring, the diameter of the grinding wheel is not less than the outer diameter of the circular ring, when the lower surface of the circular ring abuts against the upper surface of the grinding wheel, the upper surface of the grinding wheel grinds the lower surface of the circular ring to reduce its thickness; the distance detection component is located above the circular ring, and is used to measure the distance H1 between the circular ring and the upper surface of the grinding wheel and the distance H2 between the circular ring and the upper surface of the grinding wheel. During the grinding process, the thickness of the circular ring is H2-H1, and the distance detection component outputs two corresponding distance signals in real time; the target signal is the required thickness of the circular ring, and the control panel is used to receive and process the distance signal and the target signal, and control the rotation of the motor:

[0005] The thickness of the ring is greater than the required thickness, and the motor is controlled to rotate forward to drive the ring downward;

[0006] When the ring thickness is equal to the required ring thickness, the running-in is completed and the motor is controlled to reverse and drive the ring upward.

[0007] Furthermore, the slide includes a rotating bearing, a slider and a clamp; the clamp cooperates with the inner surface of the ring and is fixed to the ring by adjusting its own radial size, the clamp is fixed on the slider, the slider is installed on the rotating bearing, and the rotating bearing is connected to the motor to control the slider to move up and down.

[0008] Furthermore, the distance detection component includes a laser detector I and a laser detector II located at the same height; the laser detector I measures the distance H1 between it and the upper surface of the ring and sends a distance signal U1; the laser detector II measures the distance H2 between it and the upper surface of the grinding wheel and sends a distance signal U2.

[0009] Furthermore, the control board realizes its functions through the board program, and the control board includes an AD chip and a main chip; the AD chip is used to receive the distance signals U1 and U2, convert them into two digital quantities respectively and send them to the main chip; the main chip smoothes and filters the digital quantities, compares the difference with the target signal, and performs PWM output according to the result, and the PWM output controls the rotation of the motor.

[0010] Furthermore, it also includes an upper interface program, into which the target signal is input, and the upper interface program transmits the target signal to the board card through a network protocol.

[0011] Furthermore, the control board also includes a power module and a voltage conversion chip; the power module converts the external AC 220V into DC 5V, and the DC 5V is used to power the voltage conversion chip and the AD chip; the voltage conversion chip is electrically connected to the two laser detectors to convert U1 and U2 into DC 3.3V, and the DC 3.3V is used to power the main chip; the AD chip is electrically connected to the voltage conversion chip to receive distance signals U1 and U2.

[0012] Furthermore, the two digital quantities are smoothed and filtered by the main chip to become D1 and D2. Setting flag = 0 indicates that the initialization is not ground, and flag = 1 indicates that the thickness of the ring is consistent with the target signal; setting the working start and end points on the fixture moving path, the working start and end points are located directly above the grinding wheel, and their height is lower than the laser detector I, and the distance between the working start and end points and the upper surface of the grinding wheel is H; the ring is placed in the fixture from the working start and end points, and the initialization flag = 0 is set; when flag = 0 and D2-D1>T×K, K is the corresponding ratio of the analog quantity to the digital quantity, and T is the target When the target value of the target signal is reached, the main chip performs PWM output to control the motor to rotate forward, so that the ring moves downward, contacts the grinding wheel, and starts running-in; when D2-D1=T×K, flag=1, the main chip performs PWM output to control the motor to rotate reversely, so that the ring moves upward; when flag=1 and D2-D1<H×K, the main chip continues to output PWM to control the motor to rotate reversely, so that the ring moves upward; when flag=1 and D2-D1=H×K, the ring moves upward to the working start and end points, the motor is controlled to stop rotating, and the ring is manually taken out.

[0013] Furthermore, the main chip controls the rotation speed of the motor by setting the PWM duty cycle, thereby controlling the up and down movement speed of the ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention can realize automatic running-in of the ring, save labor and has high precision, greatly reduces the scrap rate, and can realize the grinding of the ring of any thickness by setting the target value of different target signals; the present invention uses the distance detection component to obtain the real-time thickness of the disc, through the AD chip analog-to-digital conversion, the main chip controls the motor forward and reverse rotation through PWM to control the ring to move downward for grinding, thereby realizing the adaptive running-in function.

[0016] 2. The clamp of the present invention cooperates with the inner diameter of the ring by adjusting its own radial size, that is, the clamp supports the ring inside the ring and is fixed to the ring, so that the lower surface of the ring is completely exposed, which facilitates the complete contact between the entire lower surface and the grinding wheel, thereby improving the overall grinding accuracy.

[0017] 3. The present invention uses the distance H between the working start and end points and the grinding wheel as the information that the control board needs to process, flag = 1 and D2-D1 = H×K, which means that the ring moves upward to the working start and end points. At this time, the control motor stops rotating to facilitate manual removal of the ring.

[0018] 4. The present invention controls the rotation speed of the motor by setting the PWM duty cycle, thereby controlling the up and down movement speed of the ring, and further ensuring the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] like Figure 1 As shown, the present invention provides a circular ring adaptive thickness grinding device, the hardware components of the device include a distance detection component, a grinding wheel, a control box, a motor and a slide; the slide is used to clamp the circular ring, the circular ring is placed horizontally, the axis of the circular ring is perpendicular to the horizontal plane, the lower surface of the circular ring is completely exposed, and a motor is installed above the slide. The motor controls the slide to drive the circular ring to move up and down in the vertical direction through forward and reverse rotation. When the motor rotates forward, the circular ring moves downward, and when the motor rotates reversely, the circular ring moves upward.

[0022] The grinding wheel is located directly below the ring. The grinding wheel is placed horizontally, and the axis of the grinding wheel is perpendicular to the horizontal plane. The grinding wheel is installed on the grinding wheel fixing frame. After the grinding wheel is powered on, it can automatically rotate continuously in the horizontal direction. When the ring moves down until the lower surface of the ring contacts the upper surface of the grinding wheel, the upper surface of the grinding wheel begins to grind the lower surface of the ring to reduce its thickness. The thickness of the ring refers to the length in the direction of the axis of the ring. The diameter of the grinding wheel is not less than the outer diameter of the ring, that is, the lower surface of the ring can be completely covered by the upper surface of the grinding wheel. The grinding wheel evenly grinds the lower surface of the ring to reduce the thickness of the ring.

[0023] The distance detection component is located above the ring and is used to measure the distance H1 between it and the upper surface of the ring and the distance H2 between it and the upper surface of the grinding wheel. When the lower surface of the ring abuts against the upper surface of the grinding wheel (the grinding in the present invention refers to the process of abutting and grinding between the lower surface of the ring and the upper surface of the grinding wheel), the thickness of the ring is H2-H1, and the distance detection component outputs two corresponding distance signals in real time, and the output distance signal is a voltage value (analog quantity).

[0024] All functions of the control box are completed by the control board on the box. The target signal is the required ring thickness, and the target value T of the target signal is the required ring thickness value. The control board is used to receive and process the distance signal and the target signal, and control the rotation of the motor: when the ring thickness is greater than the required ring thickness, the motor is controlled to rotate and drive the ring downward; when the ring thickness is equal to the required ring thickness and the running-in is completed, the motor is controlled to rotate and drive the ring upward so that the lower surface of the ring no longer abuts against the upper surface of the grinding wheel.

[0025] The slide includes a rotary bearing, a slider and a fixture; the fixture cooperates with the inner surface of the ring by adjusting its own radial size and is fixed to the ring. In this embodiment, the fixture is a small three-jaw chuck, the clamping claw of the three-jaw chuck can be freely extended and retracted, and the clamping claw is fixed to the ring by supporting the ring inside the ring. The three-jaw chuck is fixed on the slider, and the slider is installed on the rotary bearing. The rotary bearing is connected to the motor to control the slider to move up and down, thereby driving the ring to move up and down. The working start and end points are set on the moving path of the fixture. The working start and end points are located directly above the grinding wheel. The distance between the working start and end points and the upper surface of the grinding wheel is H. The ring is put into the fixture or taken out of the fixture from the working start and end points. After the ring is put into the fixture from the working start and end points, the control board controls the motor to rotate forward, and the ring moves downward toward the grinding wheel; after the ring is run-in, the control board controls the motor to reverse, and the ring moves upward toward the working start and end points. After reaching the working start and end points, the ring is taken out. The slide can also be provided with a measuring tool with a precise scale to facilitate the verification of the ring thickness and ensure the grinding accuracy.

[0026] As an improvement, the distance detection component includes a laser detector I and a laser detector II. The installation height and configuration of the laser detector I and the laser detector II are exactly the same. In this embodiment, the laser detector I and the laser detector II are fixed by the detector bracket. The laser detector I is installed above the fixture (circular ring), measures the distance H1 between it and the upper surface of the circular ring, and sends out a distance signal U1. The installation position of the laser detector I is higher than the working start and end points. In this embodiment, the laser detector I is installed at a height of 10 cm from the working start and end points. The laser detector II is at the same horizontal height as the laser detector I and is installed directly above the center point of the grinding wheel. The laser detector II measures the distance H2 between it and the upper surface of the grinding wheel and sends out a distance signal U2. During initialization, the grinding wheel is placed horizontally to ensure that the center point of the grinding wheel and any point on the upper surface of the grinding wheel are at the same horizontal height. When the lower surface of the circular ring abuts against the lower surface of the grinding wheel, the thickness of the circular ring is H2-H1.

[0027] In this embodiment, the software design of the ring adaptive thickness grinding device includes a board card program and an upper interface program. The board card is inserted into the control board, and all functions of the control board are realized through the board card program. According to the situation, it can be selected whether the upper interface (and the upper interface program) is needed. The target signal is manually input in the upper interface (the target value T of the target signal is the required ring thickness value), and the upper interface program is transmitted to the board card program through the network protocol. This situation is applicable to the ring thickness values ​​required by a variety of rings of different sizes; if the upper interface is not required, for example, only a specific ring thickness value is required, then only the corresponding target signal needs to be set in the board card program, and the board card sends the target signal to the control board, and the control board automatically controls the grinding according to the received target signal. That is, the device can realize self-adaptation as follows: first, the upper interface program communicates with the control board to send the target value to realize the adaptive control of the running-in degree; second, the control board can adaptively control the motor to the target value through the board card program.

[0028] The control board includes an AD chip (analog-to-digital chip) and a main chip; the AD chip is used to receive distance signals U1 and U2, convert the two analog signals U1 and U2 into two digital signals and send them to the main chip; after the main chip smoothes and filters the digital signals, the main chip compares the difference between the two with the target signal, and performs PWM output according to the comparison result, and the PWM output controls the rotation of the motor. The main chip can also control the rotation speed of the motor by setting the PWM duty cycle, thereby controlling the speed of the ring moving up and down.

[0029] In this embodiment, the control board also includes a power module and a voltage conversion chip. The power module converts the external AC 220V into DC 5V, and supplies the DC 5V to the voltage conversion chip and the AD chip; the voltage conversion chip is electrically connected to the two laser detectors, and the voltage conversion chip converts the DC voltage (U1 and U2) of the two laser detectors into DC 3.3V, and supplies the DC 3.3V to the main chip; the AD chip is electrically connected to the voltage conversion chip, and adopts 16-bit high-precision multi-channel parallel output to convert the voltage analog quantities (U1 and U2) of the two detectors into two more accurate digital quantities respectively; the main chip performs smoothing and filtering on the two digital quantities and controls the PWM output.

[0030] The two digital quantities are D1 and D2 after smoothing and filtering by the main chip. The flag is set to indicate whether the ring thickness is consistent with the target signal. Flag = 0 indicates that the initialization is not ground, and flag = 1 indicates that the running-in is completed, that is, the ring thickness is consistent with the target value T of the target signal. The entire control process of the main chip is as follows:

[0031] The ring is placed on the slide from the working start and end points, the three-jaw chuck grabs the ring, and the control board sets the initialization flag = 0;

[0032] When flag=0 and D2-D1>T×K, K is the ratio of analog quantity to digital quantity. At this time, the ring is not run-in. The main chip performs PWM output to control the motor to rotate forward, so that the ring moves downward and contacts the grinding wheel to start running-in. During the running-in process, D2-D1 decreases until D2-D1=T×K.

[0033] When D2-D1=T×K, flag=1, the main chip performs PWM output to control the motor to reverse, so that the ring moves upward. That is, when the ring thickness is consistent with the set target value, the ring is no longer run-in and moves upward. During the process from the ring contacting the grinding wheel to the upward stop of the run-in, the downward movement of the ring is the reduction of the ring thickness.

[0034] When flag=1 and D2-D1<H×K, the main chip continuously outputs PWM to control the motor to reverse, so that the ring moves upward. D2-D1<H×K indicates that the distance between the upper surface of the ring and the upper surface of the grinding wheel is less than the distance H between the working start and end points and the upper surface of the grinding wheel, that is, the ring has not reached the working start and end points;

[0035] When flag=1 and D2-D1=H×K, the ring moves upward to the work start and end points, and the ring is taken out. In this state, the board program can also be set to wait for 1 minute to take out the ground ring, put in the ring to be ground again, set the initialization flag=0 after putting in the new ring, and continue to repeat the above steps.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ring adaptive thickness running-in device, characterized in that: It includes a distance detection component, a grinding wheel, a control panel, a motor and a slide; the slide is used to clamp the circular ring horizontally, the lower surface of the circular ring is completely exposed, and the motor controls the slide to drive the circular ring to move up and down by forward and reverse rotation; the grinding wheel is located directly below the circular ring, the diameter of the grinding wheel is not less than the outer diameter of the circular ring, and when the lower surface of the circular ring contacts the upper surface of the grinding wheel, the upper surface of the grinding wheel grinds the lower surface of the circular ring to reduce its thickness; The distance detection component is located above the ring and is used to measure the distance H1 between it and the upper surface of the ring and the distance H2 between it and the upper surface of the grinding wheel. During the running-in process, the thickness of the ring is H2-H1. The distance detection component outputs two corresponding distance signals in real time; the target signal is the required thickness of the ring. The control board is used to receive and process the distance signal and the target signal, and control the rotation of the motor: The thickness of the ring is greater than the required thickness, and the motor is controlled to rotate forward to drive the ring downward; When the ring thickness is equal to the required ring thickness, the running-in is completed and the motor is controlled to reverse and drive the ring upward.

2. The ring adaptive thickness grinding device according to claim 1, characterized in that: The slide includes a rotary bearing, a slider and a clamp; the clamp cooperates with the inner surface of the ring by adjusting its own radial size and is fixed to the ring. The clamp is fixed on the slider, the slider is installed on the rotary bearing, and the rotary bearing is connected to the motor to control the slider to move up and down.

3. The ring adaptive thickness grinding device according to claim 2, characterized in that: The distance detection component includes a laser detector I and a laser detector II located at the same height; the laser detector I measures the distance H1 between it and the upper surface of the ring and sends out a distance signal U1; the laser detector II measures the distance H2 between it and the upper surface of the grinding wheel and sends out a distance signal U2.

4. The ring adaptive thickness grinding device according to claim 3, characterized in that: The control board realizes its functions through the board program. The control board includes an AD chip and a main chip. The AD chip is used to receive distance signals U1 and U2, convert them into two digital quantities respectively and send them to the main chip. The main chip smoothes and filters the digital quantities, compares the difference with the target signal, and performs PWM output according to the result. The PWM output controls the rotation of the motor.

5. The ring adaptive thickness grinding device according to claim 3, characterized in that: It also includes an upper-layer interface program, into which a target signal is input, and the upper-layer interface program transmits the target signal to the board card through a network protocol.

6. The ring adaptive thickness grinding device according to claim 4, characterized in that: The control board also includes a power module and a voltage conversion chip; the power module converts the external AC 220V into DC 5V, and the DC 5V is used to power the voltage conversion chip and the AD chip; the voltage conversion chip is electrically connected to the two laser detectors to convert U1 and U2 into DC 3.3V, and the DC 3.3V is used to power the main chip; the AD chip is electrically connected to the voltage conversion chip to receive distance signals U1 and U2.

7. The ring adaptive thickness grinding device according to claim 4, characterized in that: The two digital quantities are D1 and D2 after smoothing and filtering by the main chip. Setting flag = 0 indicates that the initialization is not ground, and flag = 1 indicates that the thickness of the ring is consistent with the target signal; Set the working start and end points on the fixture moving path. The working start and end points are located directly above the grinding wheel and their height is lower than the laser detector I. The distance between the working start and end points and the upper surface of the grinding wheel is H. Put the ring into the fixture from the working start and end points, and set the initialization flag = 0. When flag=0 and D2-D1>T×K, K is the ratio of analog quantity to digital quantity, T is the target value of the target signal, the main chip performs PWM output to control the motor to rotate forward, so that the ring moves downward and contacts the grinding wheel to start running-in; When D2-D1=T×K, flag=1, the main chip performs PWM output to control the motor to reverse, so that the ring moves upward; When flag = 1 and D2-D1 < H×K, the main chip continues to output PWM to control the motor to reverse, causing the ring to move upward; When flag = 1 and D2-D1 = H×K, the ring moves upward to the working start and end points, the motor is controlled to stop rotating, and the ring is taken out manually.

8. The ring adaptive thickness grinding device according to any one of claims 4 to 7, characterized in that: The main chip controls the motor rotation speed by setting the PWM duty cycle, thereby controlling the up and down movement speed of the ring.

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