An automatic positioning contact control automobile panel key dimension measurement system

Abstract

The present invention discloses an automatic positioning contact control automobile cover key dimension measurement system, including a base plate, a detection body, a control detection module, an upper tooling and a single chip microcomputer. The detection body is fixed on the upper surface of the base plate, the control detection module is integrated inside the detection body, and a plurality of first sensors are provided on the outer wall of the detection body, and the first sensors are electrically connected to the control detection module to detect the inner size of the automobile cover. A plurality of second sensors are also provided on the lower surface of the upper tooling, and the second sensors are used to detect the movement value of the telescopic rod. The single chip microcomputer is used to control the movement of the mechanical arm and four stepping motors. The positioning reference of the automobile cover of the present invention adopts a mechanical arm to grasp, three-dimensionally move to the inspection fixture, and perform three-dimensional induction adjustment in the X-direction, Y-direction and Z-direction, automatically control the positioning, and the positioning accuracy reaches the micron level; the detection point set such as the surface difference of the automobile cover adopts automatic positioning contact control measurement, and the accuracy reaches the micron level.

Description

Technical Field

[0001] The invention relates to the technical field of automobile component size detection, and more specifically to an automatic positioning contact control automobile cover key size measurement system. Background Art

[0002] In the key dimension detection of automobile panels, the positioning adopted by the current measurement method is generally the main and auxiliary positioning hole structure, and the hole positioning accuracy can only reach +0.1mm; the flushness detection accuracy of the panel can only reach ±0.5mm, and the flushness value determines the overall accuracy of the body assembly size; flushness detection currently uses manual detection tools (feeler gauges, flushness gauges, etc.) for detection, and the measured values ​​will vary to varying degrees due to different people, detection tools, and detection methods. At present, this method requires the calibration accuracy of the inspection tool itself to reach the micron level. However, due to the traditional manual positioning + detection of the panel, the measurement accuracy is required to reach 0.1 mm, and the measurement value variability is large, and the accuracy cannot be guaranteed; while the hole position accuracy cannot be guaranteed, the flushness accuracy cannot be guaranteed. Therefore, the key dimension accuracy of the panel is difficult to guarantee, and body assembly dimension problems frequently occur.

[0003] Therefore, how to provide a system that can effectively detect the size of automobile covering parts has become a technical problem that urgently needs to be solved in this field. Summary of the invention

[0004] The object of the present invention is to provide an automatic positioning contact control automobile panel key dimension measurement system to solve the above-mentioned background technology problems.

[0005] According to a first aspect of the present invention, there is provided an automatic positioning contact control automobile cover key dimension measurement system, comprising a base plate, a detection body, a control detection module, an upper tooling and a single chip microcomputer;

[0006] The inspection body is fixed on the upper surface of the base plate, the control detection module is integrated inside the inspection body, and a plurality of first sensors are provided on the outer side wall of the inspection body, and the first sensors are electrically connected to the control detection module to detect the inner size of the automobile cover;

[0007] A pipe column is provided on the top of the upper tooling, and the pipe column is connected to a mechanical arm so that the mechanical arm can drive the pipe column and the upper tooling to move. Stepper motors are provided at the four corners of the upper tooling, and the output end of the stepper motor is connected to a telescopic rod through a gear. A rubber suction ring is provided at the bottom of the telescopic rod, and the rubber suction ring is used to absorb and clamp the automobile cover and move it to the inspection body; a plurality of second sensors are also provided on the lower surface of the upper tooling, and the second sensors are used to detect the movement value of the telescopic rod;

[0008] The control detection module, the second sensor, and the stepper motor are all electrically connected to the single chip microcomputer, and the single chip microcomputer is used to control the movement of the mechanical arm and the four stepper motors.

[0009] Optionally, according to the automatic positioning contact control automobile cover key dimension measurement system of the present invention, the first sensor is arranged at the four corners of the inspection body, which includes a positioning detection sensor and a flushness detection sensor. The positioning detection sensor is used to detect the distance between the automobile cover and the inspection body in real time; the flushness detection sensor is used to detect the flushness around the automobile cover in real time to ensure the assembly size of the vehicle body.

[0010] Optionally, according to the automatic positioning contact control automobile panel key dimension measurement system of the present invention, the preset distance between the inspection body and the inner side of the automobile panel is 3 mm, and the tolerance range is ±0.5 mm.

[0011] Optionally, according to the automatic positioning contact control automobile cover key dimension measurement system described in the present invention, when the contact distance between the inspection body and the automobile cover is 3mm, the control detection module displays blue light; when the contact distance between the inspection body and the automobile cover is within the tolerance range of ±0.5mm, the control detection module displays yellow light and displays the tolerance value at the same time; when the contact distance between the inspection body and the automobile cover exceeds the tolerance range, the control detection module displays red light and displays the excess value at the same time.

[0012] Optionally, according to the automatic positioning contact control automobile cover key dimension measurement system of the present invention, the number of the second sensors is five, four of which are respectively arranged on one side of four stepper motors, and are used to detect in real time the distance that the stepper motor drives the telescopic rod to move; another second sensor is arranged at any point on the lower surface of the upper tooling.

[0013] Optionally, according to the automatic positioning contact control automobile cover key dimension measurement system of the present invention, the first sensor and the second sensor are both Hall sensors, and the sensor chip used is HX6649.

[0014] Optionally, according to the automatic positioning contact control automobile cover key dimension measurement system of the present invention, in the single chip microcomputer, the 2nd to 6th pins of the MCU are electrically connected to five second sensors respectively to detect the real-time distance between the lower surface of the upper tooling and the automobile cover.

[0015] Optionally, according to the automatic positioning contact control automobile cover key dimension measurement system of the present invention, the stepper motor includes a DM-01 stepper motor, a DM-02 stepper motor, a DM-03 stepper motor and a DM-04 stepper motor, and the single chip microcomputer;

[0016] Pins 19 and 20 of the MCU drive and control the DM-01 stepper motor, and the DM-01 stepper motor moves vertically corresponding to position A of the upper tooling;

[0017] Pins 21 and 22 of the MCU drive and control the DM-02 stepper motor, and the DM-02 stepper motor moves vertically corresponding to position B of the upper tooling;

[0018] Pins 25 and 26 of the MCU drive and control the DM-03 stepper motor, and the DM-03 stepper motor moves vertically corresponding to the C position of the upper tooling;

[0019] The 43rd and 44th pins of the MCU drive and control the DM-04 stepper motor, and the DM-01 stepper motor moves vertically corresponding to the D position of the upper tooling.

[0020] Optionally, according to the automatic positioning contact control automobile cover key dimension measurement system of the present invention, the mechanical arm is further provided with a DM-05 stepper motor and a DM-06 stepper motor for controlling the movement of the pipe column, and the single chip microcomputer;

[0021] The 45th and 46th pins of the MCU drive and control the DM-05 stepper motor, and the DM-05 stepper motor corresponds to the longitudinal movement of the upper tooling along the Y-axis direction;

[0022] The 47th and 48th pins of the MCU drive and control the DM-06 stepper motor, and the DM-06 stepper motor corresponds to the lateral movement of the upper tooling along the X-axis direction.

[0023] Optionally, according to the automatic positioning contact control automobile cover key dimension measurement system described in the present invention, the base plate is further provided with brackets on both sides of the inspection body, the brackets are provided with handles, and the lower side of the base plate is provided with universal rollers to facilitate the movement of the inspection body.

[0024] The present invention designs the control detection module inside the inspection fixture, and the automatic positioning detection can perform three-dimensional (X-, Y- and Z-direction) positioning of the cover. It is mainly through the mechanical arm suction cup to locate and grab the center point of the automobile cover, and then move it parallel to the induction detection inspection fixture according to the plane program designed by the automatic control system, and determine the Z-direction positioning by sensing the center point of the inspection plane, and then adjust the X- and Y-directions and sense the positioning to obtain the four-corner main body sensing positioning. The positioning accuracy of the traditional hole is +0.1mm, which belongs to the millimeter level. The induction accuracy of the automatic positioning contact control measurement and positioning system of the present invention can reach the micron level, and the accuracy is improved by 1000 times. The face difference adopts the contact control measurement detection point set. The first sensor of the inspection body can detect the face difference around the stamping part, and the face difference can ensure the assembly size of the car body. Combined with the control drive of the upper tooling to the automobile cover, the detection accuracy of the automobile cover is effectively guaranteed.

[0025] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0027] Figure 1 It is a structural schematic diagram of the upper tooling of the present invention;

[0028] Figure 2 It is the electronic control system diagram of the single chip microcomputer of the present invention;

[0029] Figure 3 It is a schematic structural diagram of the present invention;

[0030] Figure 4 For the present invention Figure 3 A partial enlarged view of .

[0031] Description of reference numerals:

[0032] 11. Base plate; 12. Inspection body; 13. Handle; 14. Positioning detection sensor; 15. Face difference detection sensor;

[0033] 21. Upper tooling; 22. Pipe column; 23. DM-01 stepper motor; 24. DM-02 stepper motor; 25. DM-03 stepper motor; 26. DM-04 stepper motor; 27- Telescopic rod; 28- Rubber suction ring. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0036] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0037] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0038] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] according to Figures 1 to 4 As shown, the present invention provides an automatic positioning contact control automobile cover key dimension measurement system, including a base plate 11, a detection body 12, a control detection module, an upper tooling 21 and a single chip microcomputer.

[0040] The inspection body 12 is fixed on the upper surface of the base plate 11. The base plate 11 is made of 45# steel plate with a thickness of 25mm. Its main function is to ensure the flatness and stability of the inspection body 12. The inspection body 12 is made of 5166 resin material, which has strong resistance to thermal expansion and thermal deformation, stable detection accuracy and high accuracy. The control detection module is integrated into the interior of the inspection body 12, and a plurality of first sensors are provided on the outer wall of the inspection body 12. The first sensors are electrically connected to the control detection module to detect the inner size of the automobile cover.

[0041] A pipe column 22 is provided at the top of the upper tooling 21, and the pipe column 22 is connected to the robot arm so that the robot arm can drive the pipe column 22 and the upper tooling 21 to move. Stepper motors are provided at the four corners of the upper tooling 21. The output end of the stepper motor is connected to a telescopic rod 27 through a gear. A rubber suction ring 28 is provided at the bottom of the telescopic rod 27. The rubber suction ring 28 is used to absorb and clamp the automobile cover and move it to the inspection body 12; a plurality of second sensors are also provided on the lower surface of the upper tooling 21, and the second sensors are used to detect the movement value of the telescopic rod 27.

[0042] The control detection module, the second sensor, and the stepper motor are all electrically connected to the single-chip microcomputer, and the single-chip microcomputer is used to control the movement of the robotic arm and the four stepper motors.

[0043] Furthermore, if Figure 3 and Figure 4 As shown, the first sensors are arranged at the four corners of the inspection body 12, which include positioning detection sensors 14 and flushness detection sensors 15. The positioning detection sensors 14 are arranged at the four corners of the inspection body 12 to detect the distance between the automobile cover and the inspection body 12 in real time; the flushness detection sensors 15 are arranged around the inspection body 12 to detect the flushness around the automobile cover in real time to ensure the vehicle body assembly size.

[0044] Furthermore, the preset distance between the detection body 12 and the inner side of the automobile covering part is 3 mm, and the tolerance range is ±0.5 mm. Within this range, the first sensor can effectively detect the inner size of the automobile covering part.

[0045] Furthermore, when the contact distance between the inspection body 12 and the automobile cover is 3mm, the control detection module displays a blue light; when the contact distance between the inspection body 12 and the automobile cover is within the tolerance range of ±0.5mm, the control detection module displays a yellow light and displays the tolerance value at the same time; when the contact distance between the inspection body 12 and the automobile cover exceeds the tolerance range, the control detection module displays a red light and displays the excess value at the same time. The control detection module displays the value detected by the first sensor in real time, so that the operator can quickly control the movement of the upper tooling 21 according to the value, so as to achieve a predetermined distance value between the automobile cover and the inspection body 12.

[0046] Furthermore, the number of second sensors is five, of which four second sensors are respectively arranged on one side of the four stepping motors; they are used to detect in real time the distance that the stepping motor drives the telescopic rod 27 to move; another second sensor is arranged at any place on the lower surface of the upper tooling 21. Figure 1 As shown, the five positions A, B, C, D, and E are the positions of the five second sensors, which are respectively set to Hall-01, Hall-02, Hall-03, Hall-04, and Hall-05.

[0047] Furthermore, the first sensor and the second sensor are both Hall sensors, and the sensor chip they use is HX6649, and the accuracy can reach micron level.

[0048] Furthermore, in the single chip microcomputer, the 2nd to 6th pins of the MCU are electrically connected to five second sensors respectively to detect the real-time distance between the lower surface of the upper tooling 21 and the automobile cover.

[0049] Optionally, according to the automatic positioning contact control automobile panel critical dimension measurement system of the present invention, the stepper motors include DM-01 stepper motor 23 , DM-02 stepper motor 24 , DM-03 stepper motor 25 and DM-04 stepper motor 26 .

[0050] In the single-chip microcomputer, the 19th and 20th pins of the MCU drive and control the DM-01 stepper motor 23, and the DM-01 stepper motor 23 corresponds to the A position of the upper tooling 21 for vertical movement; the 21st and 22nd pins of the MCU drive and control the DM-02 stepper motor 24, and the DM-02 stepper motor 24 corresponds to the B position of the upper tooling 21 for vertical movement; the 25th and 26th pins of the MCU drive and control the DM-03 stepper motor 25, and the DM-03 stepper motor 25 corresponds to the C position of the upper tooling 21 for vertical movement; the 43rd and 44th pins of the MCU drive and control the DM-04 stepper motor 26, and the DM-04 stepper motor 26 corresponds to the D position of the upper tooling 21 for vertical movement. During implementation, the distance between the cover and the inspection body 12 is detected in real time by the positioning detection sensor 14, so that it reaches the preset distance within the range of 3±0.5mm. When its value is greater than the range, it indicates that the distance between the automobile cover and the inspection body 12 is far, and the corresponding stepper motor drives the telescopic rod 27 to move toward the inspection body 12, thereby shortening the distance between the automobile cover and the inspection body 12 until the preset distance is reached; when its value is less than the range, it indicates that the distance between the automobile cover and the inspection body 12 is close, and the corresponding stepper motor drives the telescopic rod 27 to move toward the column 22, thereby increasing the distance between the automobile cover and the inspection body 12 until the preset distance is reached. When the positioning detection sensors 14 on the four corners of the inspection body 12 all detect that the distance between the automobile cover and the inspection body 12 is within the range, the face difference detection sensor 15 starts to detect the face difference around the automobile cover, and the face difference can ensure the assembly size of the vehicle body.

[0051] The second sensors at A, B, C, D, and E can display the movement values ​​of the corresponding stepper motors in real time, and combined with the first sensor, they can jointly realize the distance control between the automobile cover and the detection body 12. Generally, three points can meet the spatial positioning. The present invention adopts five detection points in order to improve the response time of the algorithm.

[0052] Furthermore, the robot arm is also provided with a DM-05 stepper motor and a DM-06 stepper motor for controlling the movement of the pipe column 22 .

[0053] In the single chip microcomputer, the 45th and 46th pins of the MCU drive and control the DM-05 stepper motor, and the DM-05 stepper motor corresponds to the longitudinal movement of the upper fixture 21 along the Y-axis direction; the 47th and 48th pins of the MCU drive and control the DM-06 stepper motor, and the DM-06 stepper motor corresponds to the lateral movement of the upper fixture 21 along the X-axis direction. Figure 2 As shown in the figure, the automatic positioning contact control measurement circuit diagram of the present invention is shown. The preset program of the workpiece is input through the 41st pin Clock and the 42nd pin DATA port of the U1 single-chip microcomputer MCU, and the upper tooling 21 places the workpiece at the preset program position through the DM-05 stepper motor and the DM-06 stepper motor. Then the U1 single-chip microcomputer MCU drives the corresponding stepper motor for precise positioning according to the real-time distance information of the four detection points A, B, C, and D of the second sensor after analysis and processing.

[0054] Furthermore, brackets are provided on both sides of the inspection body 12 on the base plate 11, and handles 13 are provided on the brackets. Universal rollers are provided on the lower side of the base plate 11 to facilitate the movement of the inspection body 12, and the main function is to ensure the position movement and transfer during the use of the inspection tool. Correspondingly, a plurality of support columns should be provided at the bottom of the base plate 11, and the universal rollers can be retracted upward so that the support columns can fix the base plate 11 on the ground. Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An automatic positioning contact control automobile panel key dimension measurement system, It is characterized in that Including base board, inspection body, control and inspection module, upper tooling and single chip microcomputer; The inspection body is fixed on the upper surface of the base plate, the control detection module is integrated inside the inspection body, and a plurality of first sensors are provided on the outer side wall of the inspection body, and the first sensors are electrically connected to the control detection module to detect the inner size of the automobile cover; A pipe column is provided on the top of the upper tooling, and the pipe column is connected to a mechanical arm so that the mechanical arm can drive the pipe column and the upper tooling to move. Stepper motors are provided at the four corners of the upper tooling, and the output end of the stepper motor is connected to a telescopic rod through a gear. A rubber suction ring is provided at the bottom of the telescopic rod, and the rubber suction ring is used to absorb and clamp the automobile cover and move it to the inspection body; a plurality of second sensors are also provided on the lower surface of the upper tooling, and the second sensors are used to detect the movement value of the telescopic rod; The control detection module, the second sensor, and the stepper motor are all electrically connected to the single chip microcomputer, and the single chip microcomputer is used to control the movement of the mechanical arm and the four stepper motors; The first sensor is arranged at the four corners of the inspection body, and includes a positioning detection sensor and a flushness detection sensor. The positioning detection sensor is used to detect the distance between the automobile cover and the inspection body in real time; the flushness detection sensor is used to detect the flushness around the automobile cover in real time to ensure the assembly size of the vehicle body.

2. The automatic positioning contact control automobile panel key dimension measurement system according to claim 1, It is characterized in that The preset distance between the inspection body and the inner side of the automobile covering part is 3 mm, and the tolerance range is ±0.5 mm.

3. The automatic positioning contact control automobile panel key dimension measurement system according to claim 2, It is characterized in that When the contact distance between the detector body and the automobile cover is 3mm, the control detection module displays blue light; when the contact distance between the detector body and the automobile cover is within the tolerance range of ±0.5mm, the control detection module displays yellow light and displays the tolerance value at the same time; when the contact distance between the detector body and the automobile cover exceeds the tolerance range, the control detection module displays red light and displays the excess value at the same time.

4. The automatic positioning contact control automobile panel key dimension measurement system according to any one of claims 1 to 3, It is characterized in that The number of the second sensors is five, of which four second sensors are respectively arranged on one side of the four stepper motors, and are used to detect in real time the distance that the stepper motor drives the telescopic rod to move; another second sensor is arranged at any point on the lower surface of the upper tooling.

5. The automatic positioning contact control automobile panel key dimension measurement system according to claim 4, It is characterized in that The first sensor and the second sensor are both Hall sensors, and the sensor chip they use is HX6649.

6. The automatic positioning contact control automobile panel key dimension measurement system according to claim 4, It is characterized in that In the single chip microcomputer, the 2nd to 6th pins of the MCU are electrically connected to five second sensors respectively to detect the real-time distance between the lower surface of the upper tooling and the automobile cover.

7. The automatic positioning contact control automobile panel key dimension measurement system according to claim 6, It is characterized in that The stepper motors include DM-01 stepper motors, DM-02 stepper motors, DM-03 stepper motors and DM-04 stepper motors, and the single chip microcomputer; Pins 19 and 20 of the MCU drive and control the DM-01 stepper motor, and the DM-01 stepper motor moves vertically corresponding to position A of the upper tooling; Pins 21 and 22 of the MCU drive and control the DM-02 stepper motor, and the DM-02 stepper motor moves vertically corresponding to position B of the upper tooling; Pins 25 and 26 of the MCU drive and control the DM-03 stepper motor, and the DM-03 stepper motor moves vertically corresponding to the C position of the upper tooling; The 43rd and 44th pins of the MCU drive and control the DM-04 stepper motor, and the DM-01 stepper motor moves vertically corresponding to the D position of the upper tooling.

8. The automatic positioning contact control automobile panel key dimension measurement system according to claim 7, It is characterized in that The mechanical arm is also provided with a DM-05 stepper motor and a DM-06 stepper motor for controlling the movement of the pipe column, and the single chip microcomputer; The 45th and 46th pins of the MCU drive and control the DM-05 stepper motor, and the DM-05 stepper motor corresponds to the longitudinal movement of the upper tooling along the Y-axis direction; The 47th and 48th pins of the MCU drive and control the DM-06 stepper motor, and the DM-06 stepper motor corresponds to the lateral movement of the upper tooling along the X-axis direction.

9. The automatic positioning contact control automobile panel key dimension measurement system according to claim 1, It is characterized in that Brackets are provided on both sides of the base plate located on the inspection body, and handles are provided on the brackets. Universal rollers are provided on the lower side of the base plate to facilitate the movement of the inspection body.

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