Method for detecting and adjusting central position of cylindrical part

Abstract

The invention relates to the technical field of mechanical detection and assembly, and particularly discloses a cylindrical part center position detection and adjustment method, which comprises a detection device, an adjustment device, a control device and an objective table fixed at the top of the adjustment device and used for placing a cylindrical part, and the control device is electrically connected with the detection device and the adjustment device; the adjusting device can adjust the position of the objective table in the width direction and the height direction of the cylindrical part, and the adjusting device can further adjust the horizontal angle and the vertical angle of the objective table. The detection device comprises a moving assembly, a laser distance sensor and a probe type distance sensor, wherein the laser distance sensor and the probe type distance sensor are connected with the moving assembly, and the moving assembly can drive the laser distance sensor and the probe type distance sensor to move. According to the invention, the accuracy of the detection result and the assembly precision can be improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical inspection and assembly technology, and in particular to a method for detecting and adjusting the center position of a cylindrical part. Background Technology

[0002] Cylindrical parts, as fundamental structural components in mechanical equipment, are widely used in rotating machinery, hydraulic transmission, and precision instruments. These parts typically require internal and external assembly with shafts, rods, or tubular components. Typical applications include air gap fits between motor stators and rotors, sealed fits between hydraulic cylinder barrels and piston rods, and precision fits between bearing housings and bearings.

[0003] Coaxiality is a core technical indicator for measuring the assembly quality of cylindrical parts, defined as the degree of deviation of the actual axis from the reference axis. In engineering practice, this type of assembly generally requires that the coaxiality error be controlled within a very small range. When the coaxiality deviation exceeds the design allowable value, it will lead to a series of performance problems.

[0004] For example, Chinese invention patent CN112104173A discloses a stator support platform and an assembly machine containing a rotor and a stator. In this patent document, the center position of the stator is determined by a visual inspection device. This inspection method is easily affected by the clarity of the camera, defects on the surface of the stator, etc., which leads to inaccurate inspection results and affects the assembly accuracy. Summary of the Invention

[0005] This invention provides a method for detecting and adjusting the center position of cylindrical parts, which can improve the accuracy of detection results and assembly precision.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] This invention provides a method for detecting and adjusting the center position of a cylindrical part, comprising a detection device, an adjustment device, a control device, and a stage fixed to the top of the adjustment device for placing the cylindrical part. The control device is electrically connected to both the detection device and the adjustment device. The adjustment device can adjust the position of the stage along the width and height directions of the cylindrical part, and can also adjust the horizontal and vertical angles of the stage. The detection device includes a moving component and two sets of laser distance sensors and two sets of probe-type distance sensors connected to the moving component. The moving component can drive the laser distance sensors and probe-type distance sensors to move. The method includes the following steps:

[0008] Two sets of laser distance sensors are moved to preset first and second initial positions, respectively. The laser distance sensors emit lasers along the length direction towards the end face of the cylindrical part to detect the distance from the end face of the cylindrical part to the two sets of laser distance sensors. The control device determines the first length direction deviation of the cylindrical part based on the distance detected by the two sets of laser distance sensors, and then controls the adjustment device to initially adjust the horizontal angle of the stage to compensate for the first length direction deviation. Two sets of probe-type distance sensors are moved to preset third and fourth initial positions, respectively. The probe-type distance sensors contact the end face of the cylindrical part to detect the position of the two contact points in the length direction. The control device determines the second length direction deviation of the cylindrical part based on the position of the two contact points in the length direction, and then controls the adjustment device to precisely adjust the horizontal angle of the stage to compensate for the second length direction deviation.

[0009] Two sets of laser distance sensors are moved to preset fifth and sixth initial positions, respectively. The laser distance sensors emit lasers along the length direction towards the end face of the cylindrical part to detect the distance from the end face of the cylindrical part to the two sets of laser distance sensors. The control device determines the third length direction deviation of the cylindrical part based on the distance detected by the two sets of laser distance sensors, and then controls the adjustment device to initially adjust the vertical angle of the stage to compensate for the third length direction deviation. Two sets of probe-type distance sensors are moved to preset seventh and eighth initial positions, respectively. The probe-type distance sensors contact the end face of the cylindrical part to detect the position of the two contact points in the length direction. The control device determines the fourth length direction deviation of the cylindrical part based on the position of the two contact points in the length direction, and then controls the adjustment device to precisely adjust the vertical angle of the stage to compensate for the fourth length direction deviation.

[0010] The laser distance sensor is moved to the preset ninth initial detection position. The laser distance sensor emits a laser along the width direction towards the inner wall of the stop of the cylindrical part to detect the distance from the inner wall of the stop to the laser distance sensor. The control device calculates the first width direction deviation between this distance and the radius of the stop, and then controls the adjustment device to initially adjust the horizontal position of the stage to compensate for the first width direction deviation. The laser distance sensor is moved to the preset tenth initial detection position. The laser distance sensor emits a laser along the height direction towards the inner wall of the stop of the cylindrical part to detect the distance from the inner wall of the stop to the laser distance sensor. The control device calculates the first height direction deviation between this distance and the radius of the stop, and then controls the adjustment device to initially adjust the height position of the stage to compensate for the first height direction deviation.

[0011] Two sets of probe-type distance sensors are moved to the preset eleventh and twelfth initial detection positions, respectively. The two sets of probe-type distance sensors contact the inner walls of the stops on both sides of the width direction. The second width direction deviation is determined based on the detection data of the two sets of probe-type distance sensors. Then, the adjustment device is controlled to precisely adjust the horizontal position of the stage to compensate for the second width direction deviation. The two sets of probe-type distance sensors are moved to the preset thirteenth and fourteenth initial detection positions, respectively. The two sets of probe-type distance sensors contact the inner walls of the stops on both sides of the height direction, respectively. The second height direction deviation is determined based on the detection data of the two sets of probe-type distance sensors. Then, the adjustment device is controlled to precisely adjust the height position of the stage to compensate for the second height direction deviation.

[0012] In some embodiments, the adjustment device includes a turntable, a first drive assembly, a base plate, a second drive assembly, and an adjustment assembly. The first drive assembly is connected to the turntable and drives the turntable to rotate about the height direction. The base plate is slidably connected to the turntable along the width direction of the cylindrical part. The second drive assembly is fixed on the turntable and connected to the base plate, and drives the base plate to slide along the width direction of the cylindrical part. The adjustment assembly is fixed on the base plate and connected to the stage, and adjusts the height of the stage and the angle of the stage about the width direction of the cylindrical part.

[0013] In some embodiments, the adjustment assembly includes two sets of connecting seats, two sets of adjusting seats, and two sets of third drive assemblies. Both sets of adjusting seats are slidably connected to the base plate along the length of the cylindrical part. Both sets of third drive assemblies are fixed to the base plate and connected to the two sets of adjusting seats respectively. The two sets of third drive assemblies are used to drive the two sets of adjusting seats to slide along the length of the cylindrical part. The two sets of connecting seats are located below the stage on both sides of the cylindrical part along its length, and are fixedly connected to the stage. Both sets of connecting seats are provided with guide rods extending along the width of the cylindrical part. Both sets of adjusting seats are provided with guide grooves. The guide rods on the two sets of connecting seats are inserted into the guide grooves of the two sets of adjusting seats, and the guide rods can slide along the guide grooves and rotate within them. The extension direction of the guide grooves is perpendicular to the width direction of the cylindrical part. The guide grooves on the two sets of adjusting seats are inclined relative to the horizontal direction, and the height of the guide grooves on the two sets of adjusting seats gradually increases in the direction of approaching each other.

[0014] In some embodiments, the first drive assembly includes a motor and a worm gear connected to the output end of the motor, and the outer periphery of the turntable is provided with turbine teeth, the worm gear meshing with the turbine teeth.

[0015] In some embodiments, the moving component includes a length direction moving mechanism, a height direction moving mechanism, a width direction moving mechanism, and a base. The laser distance sensor and the probe-type distance sensor are both fixed on the base. The base is connected to the width direction moving mechanism, which drives the base to move along the width direction of the cylindrical part. The width direction moving mechanism is connected to the height direction moving mechanism, which drives the width direction moving mechanism to move along the height direction of the cylindrical part. The height direction moving mechanism is connected to the length direction moving mechanism, which drives the height direction moving mechanism to move along the length direction of the cylindrical part.

[0016] The present invention has at least the following beneficial effects: Based on the detection data from the laser distance sensor, the present invention calculates the length, width, and height deviations of the cylindrical part, respectively, and then controls the adjustment device to initially adjust the horizontal angle, vertical angle, horizontal position, and vertical position of the stage; simultaneously, based on the detection data from the probe-type distance sensor, the present invention calculates the length, width, and height deviations of the cylindrical part, respectively, and then controls the adjustment device to precisely adjust the horizontal angle, vertical angle, horizontal position, and vertical position of the stage; by adopting a method of initial inspection followed by fine inspection, the accuracy of the inspection results is improved. Furthermore, by performing initial adjustment of the stage based on the inspection results, followed by fine adjustment, assembly accuracy is effectively improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a method for detecting and adjusting the center position of a cylindrical part according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the end face of a cylindrical part according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the end face of a cylindrical part according to another embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the stage and adjustment device according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of an adjustment device according to an embodiment of the present invention;

[0022] Figure 6 This is a side view schematic diagram of an adjustment device according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the detection device according to an embodiment of the present invention.

[0024] The attached figures are labeled as follows:

[0025] Cylindrical part 100, center hole 101, stop 102, first inspection point 110, second inspection point 120, third inspection point 130, fourth inspection point 140, fifth inspection point 150, sixth inspection point 160;

[0026] The detection device 200, the moving component 210, the length direction moving mechanism 211, the height direction moving mechanism 212, the width direction moving mechanism 213, the base 214, the laser distance sensor 221, and the probe-type distance sensor 222.

[0027] Adjustment device 300, turntable 310, first drive assembly 320, motor 321, worm gear 322, base plate 330, second drive assembly 340, adjustment assembly 350, connecting seat 351, adjustment seat 352, third drive assembly 353, guide rod 354, guide groove 355;

[0028] Stage 400. Detailed Implementation

[0029] The present invention is provided below with reference to the accompanying drawings to aid in a full understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0030] In the description of this invention, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intermediary element (e.g., the third element) between the element and the other element.

[0032] Before providing a detailed description of the invention, it is necessary to explain the structure of the cylindrical part, such as... Figure 2 and Figure 3As shown, the cylindrical part 100 can be cylindrical or approximately cylindrical, with its axial direction parallel to its length direction. It has an end face with a central hole 101 axially formed on the end face, and the end face is perpendicular to the axial direction. During assembly, other components to be assembled need to be coaxially aligned with the cylindrical part 100. Therefore, it is necessary to determine the deviation between the central axis of the cylindrical part 100 and the ideal axis by inspecting the end face of the cylindrical part 100, and then adjust the central axis of the cylindrical part 100 as close as possible to the ideal axis. Specifically, the cylindrical part 100 can be a stator, a piston cylinder, or other parts. The stop 102 is a circular groove located on the end face of the cylindrical part 100. The stop 102 is coaxially aligned with the central hole 101, and its outer diameter is larger than the diameter of the central hole 101. The stop 102 effectively enlarges the diameter of the central hole 101 at the end face, and the central hole 101 is essentially formed on the bottom wall of the stop 102.

[0033] Embodiments of the present invention provide a method for detecting and adjusting the center position of a cylindrical part, such as... Figure 1 As shown, the device includes a detection device 200, an adjustment device 300, a control device (not shown), and a platform 400 fixed on top of the adjustment device 300 for placing cylindrical parts. The control device is electrically connected to both the detection device 200 and the adjustment device 300. The control device includes, but is not limited to, a microcontroller, PLC, or other control chip. The detection device 200 can send the detected data to the control device. The control device processes and calculates the detected data according to a pre-set program, and then sends corresponding control signals to the adjustment device 300, enabling the adjustment device 300 to operate.

[0034] The adjusting device 300 can adjust the position of the stage 400 along the width and height directions of the cylindrical part, and correspondingly adjust the position of the cylindrical part on the stage 400 along the width and height directions of the cylindrical part. The adjusting device 300 can also adjust the horizontal and vertical angles of the stage 400, and correspondingly adjust the horizontal and vertical angles of the cylindrical part on the stage 400. The horizontal angle refers to the angle where the rotation axis is parallel to the height direction, and the vertical angle refers to the angle where the rotation axis is parallel to the width direction.

[0035] The detection device 200 includes a moving component 210 and two sets of laser distance sensors 221 and two sets of probe-type distance sensors 222 connected to the moving component 210. The moving component 210 can move the laser distance sensors 221 and the probe-type distance sensors 222. The moving component 210 can move the laser distance sensors 221 closer to the end face or the inner wall of the stop of the cylindrical part, and can also move the probe-type distance sensors 222 closer to the end face or the inner wall of the stop of the cylindrical part, so that the laser distance sensors 221 and the probe-type distance sensors 222 can perform detection. One set of laser distance sensors 221 may include a first laser distance sensor that emits laser light along the length direction of the cylindrical part and a second laser distance sensor that emits laser light along the radial direction of the cylindrical part. The first laser distance sensor is used to detect the end face of the cylindrical part, and the second laser distance sensor is used to detect the inner wall of the stop. A set of probe-type distance sensors 222 includes a first probe-type distance sensor extending along the length direction of the cylindrical part and a second probe-type distance sensor extending along the radial direction of the cylindrical part. The first probe-type distance sensor is used to detect the end face of the cylindrical part, and the second probe-type distance sensor is used to detect the inner wall of the stop.

[0036] The method for detecting and adjusting the center position of this cylindrical part includes the following steps:

[0037] S100: Move the two sets of laser distance sensors to the preset first initial position and second initial position respectively. The laser distance sensors emit lasers along the length direction towards the end face of the cylindrical part to detect the distance from the end face of the cylindrical part to the two sets of laser distance sensors. The control device determines the first length direction deviation of the cylindrical part based on the distance detected by the two sets of laser distance sensors, and then controls the adjustment device to initially adjust the horizontal angle of the stage to compensate for the first length direction deviation. Move the two sets of probe-type distance sensors to the preset third initial position and fourth initial position respectively. The probe-type distance sensors contact the end face of the cylindrical part to detect the position of the two contact points in the length direction. The control device determines the second length direction deviation of the cylindrical part based on the position of the two contact points in the length direction, and then controls the adjustment device to precisely adjust the horizontal angle of the stage to compensate for the second length direction deviation.

[0038] The first, second, third, and fourth initial positions, as well as the other initial positions described below, are the standard positions of the laser distance sensor and the probe-type distance sensor when detecting a cylindrical part in a standard position. These positions are pre-stored, and the moving component can move the laser distance sensor and the probe-type distance sensor to the corresponding initial positions. At these positions, the laser distance sensor and the probe-type distance sensor detect standard and correct values. Therefore, when the values ​​detected by the laser distance sensor and the probe-type distance sensor deviate from the standard values, it indicates that the central axis of the cylindrical part is deviated from the ideal axis.

[0039] like Figure 2 As shown, after the two sets of laser distance sensors move to the preset first initial position and second initial position respectively, the laser emitted by the laser distance sensors can form two first detection points 110 on the end face of the cylindrical part 100, thereby detecting the distances from the two first detection points 110 to the two sets of laser distance sensors respectively. If the distance from the right first detection point 110 to the laser distance sensor is greater than the distance from the left first detection point 110 to the laser distance sensor, when viewing the cylindrical part 100 from a top-down perspective, it is necessary to rotate the cylindrical part 100 clockwise horizontally so that the right first detection point 110 is closer to the laser distance sensor, while the left first detection point 110 is farther away from the laser distance sensor, until the distances from the two first detection points 110 to the two sets of laser distance sensors are equal. Then the line connecting the two first detection points 110 is perpendicular to the length direction of the cylindrical part 100, which can compensate for the first length direction deviation. Conversely, when the distance from the first detection point 110 on the right to the laser distance sensor is less than the distance from the first detection point 110 on the left to the laser distance sensor, when viewing the cylindrical part 100 from a top-down perspective, the cylindrical part 100 needs to be rotated horizontally counterclockwise so that the first detection point 110 on the right moves away from the laser distance sensor, while the first detection point 110 on the left moves closer to the laser distance sensor, until the distances from the two first detection points 110 to the two sets of laser distance sensors are equal.

[0040] Similarly, after the two sets of probe-type distance sensors move to the preset third and fourth initial positions respectively, they can form two contact points on the end face of the cylindrical part 100. If the distance between the right contact point and the left contact point in the length direction is greater than that between the left and right contact points, when viewing the cylindrical part 100 from a top-down perspective, the cylindrical part 100 needs to be rotated clockwise horizontally to bring the right contact point closer to the probe-type distance sensor and the left contact point further away from it, until the distance between the two contact points in the length direction is equal. Then, the line connecting the two contact points is perpendicular to the length direction of the cylindrical part 100, which can compensate for the second length direction deviation. Conversely, if the distance between the right contact point and the left contact point in the length direction is less than that between the left and right contact points, when viewing the cylindrical part 100 from a top-down perspective, the cylindrical part 100 needs to be rotated counterclockwise horizontally to move the right contact point further away from the probe-type distance sensor and the left contact point closer to it, until the distance between the two contact points in the length direction is equal.

[0041] The first and second initial positions can be located on opposite sides of the width direction of the central hole 101 of the cylindrical part 100, and they can be at the same height. The third and fourth initial positions can be located on opposite sides of the width direction of the central hole 101 of the cylindrical part 100, and they can be at the same height.

[0042] S200: Move the two sets of laser distance sensors to the preset fifth and sixth initial positions respectively. The laser distance sensors emit lasers along the length direction towards the end face of the cylindrical part to detect the distance from the end face of the cylindrical part to the two sets of laser distance sensors. The control device determines the third length direction deviation of the cylindrical part based on the distance detected by the two sets of laser distance sensors, and then controls the adjustment device to initially adjust the vertical angle of the stage to compensate for the third length direction deviation. Move the two sets of probe-type distance sensors to the preset seventh and eighth initial positions respectively. The probe-type distance sensors contact the end face of the cylindrical part to detect the position of the two contact points in the length direction. The control device determines the fourth length direction deviation of the cylindrical part based on the position of the two contact points in the length direction, and then controls the adjustment device to precisely adjust the vertical angle of the stage to compensate for the fourth length direction deviation.

[0043] Similar to step S100, such as Figure 2As shown, after the two sets of laser distance sensors move to the preset fifth and sixth initial positions respectively, the laser emitted by the laser distance sensors can form two second detection points 120 on the end face of the cylindrical part 100, thereby detecting the distances from the two second detection points 120 to the two sets of laser distance sensors respectively. If the distance from the upper second detection point 120 to the laser distance sensor is greater than the distance from the lower second detection point 120 to the laser distance sensor, when observing the cylindrical part 100 from right to left in the figure, it is necessary to rotate the cylindrical part 100 counterclockwise around the width direction so that the upper second detection point 120 is closer to the laser distance sensor and the lower second detection point 120 is farther away from the laser distance sensor, until the distances from the two second detection points 120 to the two sets of laser distance sensors are equal. Then the line connecting the two second detection points 120 is perpendicular to the length direction of the cylindrical part 100, which can compensate for the deviation in the third length direction. Conversely, if the distance from the upper second detection point 120 to the laser distance sensor is less than the distance from the lower second detection point 120 to the laser distance sensor, when observing the cylindrical part 100 from right to left in the diagram, it is necessary to rotate the cylindrical part 100 clockwise around its width direction. This will cause the upper second detection point 120 to move away from the laser distance sensor, while the lower second detection point 120 will move closer to the laser distance sensor, until the distances from the two second detection points 120 to the two sets of laser distance sensors are equal.

[0044] Similarly, after the two sets of probe-type distance sensors move to the preset seventh and eighth initial positions respectively, the two sets of probe-type distance sensors can form two contact points on the end face of the cylindrical part 100. If the distance of the upper contact point in the length direction is greater than the distance of the lower contact point in the length direction, when observing the cylindrical part 100 from right to left in the figure, it is necessary to rotate the cylindrical part 100 counterclockwise around the width direction so that the upper contact point is closer to the probe-type distance sensor and the lower contact point is farther away from the probe-type distance sensor, until the distance of the two contact points in the length direction is equal. Then the line connecting the two contact points is perpendicular to the length direction of the cylindrical part 100, which can compensate for the deviation in the fourth length direction. Conversely, if the distance between the upper contact point and the lower contact point in the length direction is less than the distance between the lower contact point in the length direction, when viewing the cylindrical part 100 from right to left in the figure, it is necessary to rotate the cylindrical part 100 clockwise around the width direction so that the upper contact point moves away from the probe-type distance sensor and the lower contact point moves closer to the probe-type distance sensor, until the distance between the two contact points in the length direction is equal.

[0045] The fifth and sixth initial positions can be located on opposite sides of the height direction of the central hole 101 of the cylindrical part 100, and they can be in the same vertical plane. The seventh and eighth initial positions can be located on opposite sides of the height direction of the central hole 101 of the cylindrical part 100, and they can be in the same vertical plane.

[0046] After steps S100 and S200, the end face of the cylindrical part 100 is perpendicular to the length direction, i.e., parallel to the ideal axis. Subsequently, the position of the cylindrical part 100 in the width and height directions needs to be adjusted so that the axis of the cylindrical part 100 is coaxial with the ideal axis.

[0047] S300: Move the laser distance sensor to the preset ninth initial detection position. The laser distance sensor emits a laser along the width direction towards the inner wall of the stop of the cylindrical part to detect the distance from the inner wall of the stop to the laser distance sensor. The control device calculates the first width direction deviation between this distance and the radius of the stop, and then controls the adjustment device to initially adjust the horizontal position of the stage to compensate for the first width direction deviation. Move the laser distance sensor to the preset tenth initial detection position. The laser distance sensor emits a laser along the height direction towards the inner wall of the stop of the cylindrical part to detect the distance from the inner wall of the stop to the laser distance sensor. The control device calculates the first height direction deviation between this distance and the radius of the stop, and then controls the adjustment device to initially adjust the height position of the stage to compensate for the first height direction deviation.

[0048] by Figure 3For example, the laser distance sensor emits a laser beam to the right along the width direction onto the inner wall of the stop 102 of the cylindrical part 100 to form a third detection point 130 on the inner wall of the stop 102 of the cylindrical part 100. If the cylindrical part 100 is coaxially arranged with an ideal axis, then the distance from the third detection point 130 to the laser distance sensor should be equal to the radius of the stop 102. When the distance from the third detection point 130 to the laser distance sensor is greater than the radius of the stop 102, the stage is moved to the left along the width direction until the distance from the third detection point 130 to the laser distance sensor is equal to the radius of the stop 102. Conversely, when the distance from the third detection point 130 to the laser distance sensor is less than the radius of the stop 102, the stage is moved to the right along the width direction until the distance from the third detection point 130 to the laser distance sensor is equal to the radius of the stop 102. Similarly, the laser distance sensor emits a laser upward along the height direction onto the inner wall of the stop 102 of the cylindrical part 100 to form a fifth detection point 150 on the inner wall of the stop 102 of the cylindrical part 100. If the cylindrical part 100 is coaxially arranged with an ideal axis, then the distance from the fifth detection point 150 to the laser distance sensor should be equal to the radius of the stop 102. When the distance from the fifth detection point 150 to the laser distance sensor is greater than the radius of the stop 102, the stage is moved downward along the height direction until the distance from the fifth detection point 150 to the laser distance sensor is equal to the radius of the stop 102. Conversely, when the distance from the fifth detection point 150 to the laser distance sensor is less than the radius of the stop 102, the stage is moved upward along the height direction until the distance from the fifth detection point 150 to the laser distance sensor is equal to the radius of the stop 102.

[0049] After step S300, the position of the cylindrical part 100 in the width and height directions is initially adjusted so that the axis of the cylindrical part 100 is close to the ideal axis.

[0050] S400: Move the two sets of probe-type distance sensors to the preset eleventh and twelfth initial detection positions respectively. The two sets of probe-type distance sensors contact the inner walls of the stops on both sides of the width direction. Determine the second width direction deviation based on the detection data of the two sets of probe-type distance sensors. Then control the adjustment device to precisely adjust the horizontal position of the stage to compensate for the second width direction deviation. Move the two sets of probe-type distance sensors to the preset thirteenth and fourteenth initial detection positions respectively. The two sets of probe-type distance sensors contact the inner walls of the stops on both sides of the height direction respectively. Determine the second height direction deviation based on the detection data of the two sets of probe-type distance sensors. Then control the adjustment device to precisely adjust the height position of the stage to compensate for the second height direction deviation.

[0051] by Figure 3For example, two sets of probe-type distance sensors contact the inner walls of the stops 102 on both sides of the width direction, forming a third detection point 130 and a fourth detection point 140, respectively. When the detection data of the two sets of probe-type distance sensors for the third detection point 130 and the fourth detection point 140 are equal, it indicates that the axis of the cylindrical part 100 is at the same position as the ideal axis in the width direction. When the distance data of the fourth detection point 140 is greater than the distance data of the third detection point 130, the stage is moved to the left along the width direction until the distance data of the fourth detection point 140 is equal to the distance data of the third detection point 130. Conversely, when the distance data of the fourth detection point 140 is less than the distance data of the third detection point 130, the stage is moved to the right along the width direction until the distance data of the fourth detection point 140 is equal to the distance data of the third detection point 130.

[0052] Two sets of probe-type distance sensors contact the inner walls of the stops 102 on both sides of the height direction, forming a fifth detection point 150 and a sixth detection point 160, respectively. When the detection data of the two sets of probe-type distance sensors for the fifth detection point 150 and the sixth detection point 160 are equal, it indicates that the axis of the cylindrical part 100 is at the same position as the ideal axis in the height direction. When the distance data of the fifth detection point 150 is greater than the distance data of the sixth detection point 160, the stage is moved downward along the height direction until the distance data of the fifth detection point 150 equals the distance data of the sixth detection point 160. Conversely, when the distance data of the fifth detection point 150 is less than the distance data of the sixth detection point 160, the stage is moved upward along the height direction until the distance data of the fifth detection point 150 equals the distance data of the sixth detection point 160.

[0053] The eleventh and twelfth initial positions can be located on opposite sides of the width direction of the central hole 101 of the cylindrical part 100, and they can be at the same height. The thirteenth and fourteenth initial positions can be located on opposite sides of the height direction of the central hole 101 of the cylindrical part 100, and they can be in the same vertical plane.

[0054] After step S400, the position of the cylindrical part 100 in the width and height directions is precisely adjusted so that the axis of the cylindrical part 100 is closer to the ideal axis.

[0055] This embodiment calculates the length, width, and height deviations of the cylindrical part based on the detection data from the laser distance sensor, and then controls the adjustment device to initially adjust the horizontal angle, vertical angle, horizontal position, and vertical position of the stage. Simultaneously, it calculates the length, width, and height deviations of the cylindrical part based on the detection data from the probe-type distance sensor, and then controls the adjustment device to precisely adjust the horizontal angle, vertical angle, horizontal position, and vertical position of the stage. This approach of initial inspection followed by fine inspection improves the accuracy of the inspection results. Furthermore, by initially adjusting the stage based on the inspection results and then performing fine adjustment, the assembly accuracy is effectively improved.

[0056] In some embodiments, such as Figure 4 and Figure 5 As shown, the adjustment device 300 includes a turntable 310, a first drive assembly 320, a base plate 330, a second drive assembly 340, and an adjustment assembly 350. The first drive assembly 320 is connected to the turntable 310 and is used to drive the turntable 310 to rotate around the height direction, which can adjust the horizontal angle of the platform 400. The base plate 330 is slidably connected to the turntable 310 along the width direction of the cylindrical part. The second drive assembly 340 is fixed on the turntable 310 and connected to the base plate 330. The second drive assembly 340 is used to drive the base plate 310 to rotate around the height direction. The stage 400 can be adjusted along the width direction of the cylindrical part by sliding the stage 30 along the width direction of the cylindrical part; the adjustment component 350 is fixed on the base plate 330 and connected to the stage 400. The adjustment component 350 is used to adjust the height of the stage 400, which can adjust the position of the stage 400 along the height direction of the cylindrical part; the adjustment component 350 is also used to adjust the angle of the stage 400 around the width direction of the cylindrical part, which can adjust the vertical angle of the stage 400.

[0057] Furthermore, such as Figure 5 and Figure 6As shown, the adjustment assembly 350 includes two sets of connecting seats 351, two sets of adjusting seats 352, and two sets of third drive assemblies 353. Both sets of adjusting seats 352 are slidably connected to the base plate 330 along the length of the cylindrical part. Both sets of third drive assemblies 353 are fixed to the base plate 330 and are respectively connected to the two sets of adjusting seats 352. The two sets of third drive assemblies 353 are used to drive the two sets of adjusting seats 352 to slide along the length of the cylindrical part. The two sets of connecting seats 351 are located below the stage on both sides of the cylindrical part along its length, and both sets of connecting seats 351 are slidably connected to the base plate 330 along the length of the cylindrical part. The stages are fixedly connected, and both sets of connecting seats 351 are provided with guide rods 354 extending along the width direction of the cylindrical part; both sets of adjusting seats 352 are provided with guide grooves 355, and the guide rods 354 on the two sets of connecting seats 351 are respectively inserted into the guide grooves 355 of the two sets of adjusting seats 352, and the guide rods 354 can slide along the guide grooves 355 and rotate in the guide grooves 355; the extension direction of the guide grooves 355 is perpendicular to the width direction of the cylindrical part, and the guide grooves 355 on the two sets of adjusting seats 352 are inclined relative to the horizontal direction. In the direction of approaching each other, the height of the guide grooves 355 on the two sets of adjusting seats 352 gradually increases.

[0058] The weight of the stage and the cylindrical parts on it is loaded onto the connecting seat 351, and then the guide rod 354 is supported by the bottom wall of the guide groove 355. When the height of the stage needs to be increased, the two sets of third drive components 353 drive the two sets of adjusting seats 352 away from each other, and the guide rod 354 moves to a higher position in the guide groove 355, thereby lifting the stage upward to increase its height. Conversely, when the height of the stage needs to be decreased, the two sets of third drive components 353 drive the two sets of adjusting seats 352 towards each other, and the guide rod 354 moves to a lower position in the guide groove 355, thereby lowering the stage downward to reduce its height.

[0059] When the vertical height of the stage needs to be adjusted, one set of third drive components 353 drives the corresponding adjustment seat 352 to slide along the length of the cylindrical part, creating a height difference between the two sets of connecting seats 351, thus changing the vertical height of the stage. Since the guide rod 354 can rotate within the guide groove 355, it can adapt to changes in the vertical height of the stage.

[0060] In this embodiment, the third drive component 353 may be an electric push rod, which is equipped with a servo motor to precisely control the position of the adjustment seat 352 in the length direction of the cylindrical part.

[0061] In some embodiments, such as Figure 5 and Figure 6As shown, the first drive assembly 320 includes a motor 321 and a worm gear 322 connected to the output end of the motor 321. The outer periphery of the turntable 310 is provided with worm gear teeth, and the worm gear 322 meshes with the worm gear teeth. The motor 321 can drive the worm gear 322 to rotate, and the worm gear 322, through meshing with the worm gear teeth, drives the turntable 310 to rotate, thereby adjusting the horizontal angle of the turntable.

[0062] Among them, motor 321 can be a servo motor to improve the adjustment accuracy.

[0063] In some embodiments, the laser distance sensor includes a laser distance sensor, and the probe-type distance sensor includes a probe-type distance sensor. The laser distance sensor can emit laser light along the length direction of the cylindrical part, and the probe-type distance sensor can also be arranged along the length direction of the cylindrical part.

[0064] In some embodiments, such as Figure 1 and Figure 7 As shown, the moving assembly 210 includes a length direction moving mechanism 211, a height direction moving mechanism 212, a width direction moving mechanism 213, and a base 214. The laser distance sensor 211 and the probe-type distance sensor 212 are both fixed on the base 214. The base 214 is connected to the width direction moving mechanism 213, which drives the base 214 to move along the width direction of the cylindrical part. The width direction moving mechanism 213 is connected to the height direction moving mechanism 212, which drives the width direction moving mechanism 213 to move along the height direction of the cylindrical part. The height direction moving mechanism 212 is connected to the length direction moving mechanism 211, which drives the height direction moving mechanism 212 to move along the length direction of the cylindrical part. Thus, the laser distance sensor 211 and the probe-type distance sensor 212 can be moved in three dimensions.

[0065] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the invention. Therefore, those skilled in the art will understand that the foregoing description of various embodiments of the invention is illustrative only and not intended to limit the invention as defined by the appended claims and their equivalents.

Claims

1. A method for detecting and adjusting the center position of a cylindrical part, characterized in that, The device includes a detection device, an adjustment device, a control device, and a platform fixed on top of the adjustment device for placing a cylindrical part. The control device is electrically connected to both the detection device and the adjustment device. The adjustment device can adjust the position of the platform along the width and height directions of the cylindrical part, and can also adjust the horizontal and vertical angles of the platform. The detection device includes a moving component and two sets of laser distance sensors and two sets of probe-type distance sensors connected to the moving component. The moving component can drive the laser distance sensors and probe-type distance sensors to move. The device includes the following steps: Two sets of laser distance sensors are moved to preset first and second initial positions, respectively. The laser distance sensors emit lasers along the length direction towards the end face of the cylindrical part to detect the distance from the end face of the cylindrical part to the two sets of laser distance sensors. The control device determines the first length direction deviation of the cylindrical part based on the distance detected by the two sets of laser distance sensors, and then controls the adjustment device to initially adjust the horizontal angle of the stage to compensate for the first length direction deviation. Two sets of probe-type distance sensors are moved to preset third and fourth initial positions, respectively. The probe-type distance sensors contact the end face of the cylindrical part to detect the position of the two contact points in the length direction. The control device determines the second length direction deviation of the cylindrical part based on the position of the two contact points in the length direction, and then controls the adjustment device to precisely adjust the horizontal angle of the stage to compensate for the second length direction deviation. Two sets of laser distance sensors are moved to preset fifth and sixth initial positions, respectively. The laser distance sensors emit lasers along the length direction towards the end face of the cylindrical part to detect the distance from the end face of the cylindrical part to the two sets of laser distance sensors. The control device determines the third length direction deviation of the cylindrical part based on the distance detected by the two sets of laser distance sensors, and then controls the adjustment device to initially adjust the vertical angle of the stage to compensate for the third length direction deviation. Two sets of probe-type distance sensors are moved to preset seventh and eighth initial positions, respectively. The probe-type distance sensors contact the end face of the cylindrical part to detect the position of the two contact points in the length direction. The control device determines the fourth length direction deviation of the cylindrical part based on the position of the two contact points in the length direction, and then controls the adjustment device to precisely adjust the vertical angle of the stage to compensate for the fourth length direction deviation. The laser distance sensor is moved to the preset ninth initial detection position. The laser distance sensor emits a laser along the width direction towards the inner wall of the stop of the cylindrical part to detect the distance from the inner wall of the stop to the laser distance sensor. The control device calculates the first width direction deviation between this distance and the radius of the stop, and then controls the adjustment device to initially adjust the horizontal position of the stage to compensate for the first width direction deviation. The laser distance sensor is moved to the preset tenth initial detection position. The laser distance sensor emits a laser along the height direction towards the inner wall of the stop of the cylindrical part to detect the distance from the inner wall of the stop to the laser distance sensor. The control device calculates the first height direction deviation between this distance and the radius of the stop, and then controls the adjustment device to initially adjust the height position of the stage to compensate for the first height direction deviation. Two sets of probe-type distance sensors are moved to the preset eleventh and twelfth initial detection positions, respectively. The two sets of probe-type distance sensors contact the inner walls of the stops on both sides of the width direction. The second width direction deviation is determined based on the detection data of the two sets of probe-type distance sensors. Then, the adjustment device is controlled to precisely adjust the horizontal position of the stage to compensate for the second width direction deviation. The two sets of probe-type distance sensors are moved to the preset thirteenth and fourteenth initial detection positions, respectively. The two sets of probe-type distance sensors contact the inner walls of the stops on both sides of the height direction, respectively. The second height direction deviation is determined based on the detection data of the two sets of probe-type distance sensors. Then, the adjustment device is controlled to precisely adjust the height position of the stage to compensate for the second height direction deviation.

2. The method for detecting and adjusting the center position of a cylindrical part according to claim 1, characterized in that: The adjustment device includes a turntable, a first drive assembly, a base plate, a second drive assembly, and an adjustment assembly. The first drive assembly is connected to the turntable and drives the turntable to rotate around the height direction. The base plate is slidably connected to the turntable along the width direction of the cylindrical part. The second drive assembly is fixed on the turntable and connected to the base plate, and drives the base plate to slide along the width direction of the cylindrical part. The adjustment assembly is fixed on the base plate and connected to the stage, and adjusts the height of the stage and the angle of the stage around the width direction of the cylindrical part.

3. The method for detecting and adjusting the center position of a cylindrical part according to claim 2, characterized in that: The adjustment assembly includes two sets of connecting seats, two sets of adjusting seats, and two sets of third drive assemblies. Both sets of adjusting seats are slidably connected to the base plate along the length of the cylindrical part. Both sets of third drive assemblies are fixed to the base plate and connected to the two sets of adjusting seats respectively. The two sets of third drive assemblies are used to drive the two sets of adjusting seats to slide along the length of the cylindrical part. The two sets of connecting seats are located below the stage on both sides of the cylindrical part along its length and are fixedly connected to the stage. Both sets of connecting seats are provided with guide rods extending along the width of the cylindrical part. Both sets of adjusting seats are provided with guide grooves. The guide rods on the two sets of connecting seats are inserted into the guide grooves of the two sets of adjusting seats, and the guide rods can slide along the guide grooves and rotate within them. The extension direction of the guide grooves is perpendicular to the width direction of the cylindrical part. The guide grooves on the two sets of adjusting seats are inclined relative to the horizontal direction, and the height of the guide grooves on the two sets of adjusting seats gradually increases in the direction they approach each other.

4. The method for detecting and adjusting the center position of a cylindrical part according to claim 2, characterized in that: The first drive assembly includes a motor and a worm gear connected to the output end of the motor. The outer periphery of the turntable is provided with worm gear teeth, and the worm gear meshes with the worm gear teeth.

5. The method for detecting and adjusting the center position of a cylindrical part according to any one of claims 1-4, characterized in that: The moving component includes a length direction moving mechanism, a height direction moving mechanism, a width direction moving mechanism, and a base. The laser distance sensor and the probe-type distance sensor are both fixed on the base. The base is connected to the width direction moving mechanism, which drives the base to move along the width direction of the cylindrical part. The width direction moving mechanism is connected to the height direction moving mechanism, which drives the width direction moving mechanism to move along the height direction of the cylindrical part. The height direction moving mechanism is connected to the length direction moving mechanism, which drives the height direction moving mechanism to move along the length direction of the cylindrical part.

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