A device and method for inspecting the appearance and dimensions of an inner hole cylinder

Abstract

The present application relates to a kind of inner hole cylinder appearance and size detection device and method, device includes: moving track unit, workpiece rotating mechanism, first end surface detection unit, second end surface detection unit, outer surface detection unit, inner hole detection unit and control unit, wherein, workpiece rotating mechanism can rotate to drive the workpiece to be measured rotation, and workpiece rotating mechanism can move along moving track unit;First end surface detection unit is used to obtain the image of the first end surface of the workpiece to be measured;Second end surface detection unit is used to obtain the image of the second end surface of the workpiece to be measured;Outer surface detection unit is used to obtain the image of the outer surface of the workpiece to be measured;Inner hole detection unit is used to send sensing signal to the bottom of inner hole and second end surface, receive the sensing signal returned by inner hole bottom and second end surface, and obtain the image of the side surface of inner hole and the bottom of inner hole.The detection device can realize the full-automatic detection of inner hole cylinder, meet the detection requirement of modern manufacturing industry to high-quality product.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of industrial detection equipment, and particularly relates to a device and method for appearance and size detection of an inner hole cylinder. BACKGROUND

[0002] In modern manufacturing, inner hole cylinder parts are widely used in the fields of machinery, automobiles, aerospace, etc. The machining precision and surface quality of these parts directly affect the performance and service life of the final product. Therefore, appearance defect detection, hole depth measurement and size inspection of the inner hole cylinder become important links to ensure product quality.

[0003] The traditional inner hole cylinder detection method mainly relies on manual operation or semi-automatic equipment. Manual operation mainly relies on the experience and visual judgment of the operator, and is easily affected by factors such as fatigue and emotion, resulting in unstable detection results, especially in scenarios requiring high-precision detection, the error rate is high. And the traditional semi-automatic detection equipment usually only has a single function, and cannot realize one-time comprehensive detection of the appearance and size of the inner hole cylinder, and needs to transfer the parts between different equipment multiple times, resulting in a long detection process and low efficiency. SUMMARY

[0004] In order to solve the above problems existing in the prior art, the application provides a device and method for appearance and size detection of an inner hole cylinder. The technical problem to be solved by the application is solved by the following technical scheme:

[0005] The application provides a device for appearance and size detection of an inner hole cylinder, comprising: a moving track unit, a workpiece rotating mechanism, a first end face detection unit, a second end face detection unit, an outer surface detection unit, an inner hole detection unit and a control unit, wherein,

[0006] The moving track unit is arranged along the X-axis direction;

[0007] The workpiece rotating mechanism is used to carry the workpiece to be detected, and can rotate to drive the workpiece to be detected to rotate. The workpiece rotating mechanism is movably connected to the moving track unit and can move along the moving track unit;

[0008] The first end face detection unit is arranged above the moving track unit and is used to obtain the image of the first end face of the workpiece to be detected;

[0009] The second end face detection unit is arranged at the conveying end of the moving track unit and is used to obtain the image of the second end face of the workpiece to be detected. The second end face of the workpiece to be detected is an end face with an inner hole;

[0010] The outer surface detection unit is arranged on one side of the moving track unit, and is configured to acquire an image of the outer surface of the workpiece to be detected.

[0011] The inner hole detection unit is arranged on the side of the second end surface detection unit away from the moving track unit, and is configured to send a sensing signal to the bottom of the inner hole and the second end surface, receive a returned sensing signal of the bottom of the inner hole and the second end surface, and acquire an image of the side surface of the inner hole and the bottom of the inner hole.

[0012] The control unit is electrically connected to the moving track unit, the workpiece rotating mechanism, the first end surface detection unit, the second end surface detection unit, the outer surface detection unit and the inner hole detection unit, and is configured to detect appearance defects of the workpiece to be detected according to the image of the first end surface of the workpiece to be detected, the image of the second end surface of the workpiece to be detected, the image of the outer surface of the workpiece to be detected, the image of the side surface of the inner hole and the image of the bottom of the inner hole, and obtain the size of the inner hole according to the returned sensing signal of the bottom of the inner hole and the second end surface.

[0013] In an implementable manner, the moving track unit comprises a conveying slide rail, a fixed slide rail and a first driving motor, wherein,

[0014] The conveying slide rail is arranged along the X-axis direction and is slidably connected to the workpiece rotating mechanism.

[0015] The fixed slide rail is arranged parallel to the conveying slide rail and is slidably connected to the workpiece rotating mechanism, and a plurality of fixing holes for fixing the workpiece rotating mechanism are formed in the fixed slide rail.

[0016] The first driving motor is fixed at the conveying end of the conveying slide rail and is configured to drive the workpiece rotating mechanism to slide on the conveying slide rail and the fixed slide rail.

[0017] In an implementable manner, the workpiece rotating mechanism comprises a connecting plate, a fixing seat, a second driving motor, a belt pulley transmission assembly, a first rotating shaft and a second rotating shaft, wherein,

[0018] The connecting plate is movably connected to the conveying slide rail and the fixed slide rail and is configured to move along the conveying slide rail and the fixed slide rail under the driving of the second driving motor.

[0019] The fixing seat is fixedly connected to the connecting plate.

[0020] The second driving motor is fixed in the interior of the fixing seat.

[0021] The belt wheel transmission assembly comprises a driving wheel, a transmission belt, a first driven wheel and a second driven wheel, the driving wheel is connected to the output end of the second driving motor, the first driven wheel and the second driven wheel are arranged in parallel, and the driving wheel drives the first driven wheel and the second driven wheel to rotate through the transmission belt.

[0022] The first rotating shaft is vertically arranged between the two ends of the fixed seat, and is fixedly connected to the first driven wheel and can rotate under the driving of the first driven wheel.

[0023] The second rotating shaft is arranged in parallel to the first rotating shaft, and is fixedly connected to the second driven wheel and can rotate under the driving of the second driven wheel.

[0024] In an implementable manner, the first end surface detection unit comprises a gantry, a first slide rail assembly, a third driving motor and a first industrial camera, wherein,

[0025] The gantry is arranged above the moving rail unit;

[0026] The fixed part of the first slide rail assembly is fixedly connected to the gantry;

[0027] The output end of the third driving motor is connected to the sliding part of the first slide rail assembly, and drives the sliding part of the slide rail assembly to move along the Y-axis direction;

[0028] The first industrial camera is fixedly connected to the sliding part of the first slide rail assembly, and can move along the Y-axis direction under the driving of the sliding part of the first slide rail assembly, and the first industrial camera is used for shooting the image of the first end surface of the workpiece to be detected.

[0029] In an implementable manner, the outer surface detection unit comprises a second slide rail assembly, a second industrial camera, a fourth driving motor and a support ridge, wherein,

[0030] The fixed part of the second slide rail assembly is arranged on one side of the moving rail unit and located between the first end surface detection unit and the second end surface detection unit;

[0031] The second industrial camera is fixedly connected to the sliding part of the second slide rail assembly, and can move along the Y-axis direction under the driving of the sliding part of the second slide rail assembly, and the second industrial camera is used for shooting the image of the outer surface of the workpiece to be detected;

[0032] The output end of the fourth driving motor is connected to the sliding part of the second slide rail assembly, and drives the sliding part of the second slide rail assembly to move along the Y-axis direction;

[0033] The fixed part of the third slide rail assembly is fixedly connected to the fixed part of the second slide rail assembly.

[0034] In an implementable mode, the inner hole detection unit comprises a third slide rail assembly, a fourth slide rail assembly, a fifth slide rail assembly, a fixed assembly, a sensor and a shooting assembly, wherein,

[0035] The fixed part of the third slide rail assembly is arranged on the side of the second end face detection unit away from the moving rail unit, and the sliding part of the third slide rail assembly can move along the X-axis direction.

[0036] The fixed part of the fourth slide rail assembly is fixedly connected to the sliding part of the third slide rail assembly, and can move along the X-axis direction under the driving of the sliding part of the third slide rail assembly, and the sliding part of the fourth slide rail assembly can move along the Z-axis direction.

[0037] The fixed part of the fifth slide rail assembly is fixedly connected to the sliding part of the fourth slide rail assembly, and can move along the Z-axis direction under the driving of the sliding part of the fourth slide rail assembly, and the sliding part of the fifth slide rail assembly can move along the Y-axis direction.

[0038] The fixed assembly is fixedly connected to the sliding part of the fifth slide rail assembly, and the fixed assembly can approach or move away from the bottom of the inner hole under the driving of the sliding part of the third slide rail assembly.

[0039] The sensor is arranged at the end of the fixed assembly, and is used for sending a sensing signal to the bottom of the inner hole and the second end face and receiving a sensing signal returned by the bottom of the inner hole and the second end face.

[0040] The shooting assembly is arranged on the side of the fixed assembly, and is used for shooting the image of the bottom of the inner hole and the image of the side of the inner hole.

[0041] In an implementable mode, the fixed part of the third slide rail assembly, the fixed part of the fourth slide rail assembly and the fixed part of the fifth slide rail assembly are all provided with displacement detection structures.

[0042] In an implementable mode, the workbench is further included.

[0043] The workbench is used for carrying the moving rail unit, the workpiece rotating mechanism, the first end face detection unit, the second end face detection unit, the outer surface detection unit and the inner hole detection unit.

[0044] The second aspect of the present application provides an inner hole cylindrical body appearance and size detection method, which is used for the inner hole cylindrical body appearance and size detection device provided in the first aspect of the present application, and comprises the following steps:

[0045] Control the workpiece rotating mechanism to carry the workpiece to be tested to move along the moving track unit between the first end face detection unit and the second end face detection unit;

[0046] Control the first end face detection unit to acquire the image of the first end face of the workpiece to be tested;

[0047] Control the second end face detection unit to acquire the image of the second end face of the workpiece to be tested;

[0048] Control the outer surface detection unit to acquire the image of the outer surface of the workpiece to be tested;

[0049] Control the inner hole detection unit to send a sensing signal to the bottom of the inner hole and the second end face, receive the sensing signal returned by the bottom of the inner hole and the second end face, and acquire the image of the side surface of the inner hole and the bottom of the inner hole;

[0050] Detect the appearance defect of the workpiece to be tested according to the image of the first end face of the workpiece to be tested, the image of the second end face of the workpiece to be tested, the image of the outer surface of the workpiece to be tested, the image of the side surface of the inner hole and the image of the bottom of the inner hole, and obtain the size of the inner hole according to the sensing signal returned by the bottom of the inner hole and the second end face.

[0051] In an implementable mode, control the inner hole detection unit to send a sensing signal to the bottom of the inner hole when at a first preset position, receive the sensing signal returned by the bottom of the inner hole, and acquire the image of the side surface of the inner hole;

[0052] Control the inner hole detection unit to send a sensing signal to the second end face when at a second preset position, and receive the sensing signal returned by the second end face;

[0053] The size of the inner hole L=L1-L2+L3; wherein,

[0054] L1 is a distance value obtained according to the sensing signal returned by the bottom of the inner hole;

[0055] L2 is a distance value obtained according to the sensing signal returned by the second end face;

[0056] L3 is the travel value of the inner hole detection unit along the X-axis direction when the inner hole detection unit moves from the first preset position to the second preset position.

[0057] Compared with the prior art, the present application has the following advantages:

[0058] The application provides an inner hole cylinder appearance and size detection device, which comprises a first end face detection unit and a second end face detection unit, which respectively shoot first end face and second end face images of a workpiece to be detected; a workpiece rotating mechanism rotates and drives the workpiece to rotate; an outer surface detection unit shoots an image of an outer surface of the workpiece to be detected when the workpiece rotates; an inner hole detection unit sends a sensing signal to a bottom of an inner hole and a second end face, receives a sensing signal returned by the bottom of the inner hole and the second end face, and shoots an image of a side surface and a bottom of the inner hole; appearance defects of the workpiece to be detected are detected through the first end face image of the workpiece to be detected, the second end face image of the workpiece to be detected, the outer surface image of the workpiece to be detected and the side surface image of the inner hole; and the size of the inner hole is obtained according to the sensing signal returned by the bottom of the inner hole and the second end face, so that appearance and size detection of the workpiece to be detected is completed. The detection device can realize full-automatic detection of the inner hole cylinder, reduces manual intervention, significantly improves detection efficiency, ensures accurate detection of the appearance and size of the inner hole cylinder, greatly reduces error rate, realizes comprehensive detection of the inner hole cylinder, ensures overall quality control of products, and meets detection requirements of modern manufacturing industry on high-quality products. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 FIG. 1 is a structural schematic diagram of an inner hole cylinder appearance and size detection device provided by an embodiment of the application;

[0060] Figure 2 FIG. 5 is a structural schematic diagram of a moving track unit and a workpiece rotating mechanism provided by an embodiment of the application;

[0061] Figure 3 FIG. 6 is a structural schematic diagram of a workpiece rotating mechanism provided by an embodiment of the application;

[0062] Figure 4 FIG. 7 is a structural schematic diagram of a first end face detection unit provided by an embodiment of the application;

[0063] Figure 5 FIG. 8 is a structural schematic diagram of an outer surface detection unit provided by an embodiment of the application;

[0064] Figure 6 FIG. 9 is a structural schematic diagram of an inner hole detection unit provided by an embodiment of the application.

[0065] REFERENCE SIGNS:

[0066] 1: moving track unit; 11: transport slide rail; 12: fixed slide rail; 13: first drive motor; 2: workpiece rotating mechanism; 21: connecting plate; 22: fixed seat; 23: second drive motor; 24: pulley transmission assembly; 241: driving wheel; 242: transmission belt; 243: first driven wheel; 244: second driven wheel; 25: first rotating shaft; 26: second rotating shaft; 3: first end face detection unit; 31: gantry; 32: first slide rail assembly; 33: third drive motor; 34: first industrial camera; 4: second end face detection unit; 5: outer surface detection unit; 51: second slide rail assembly; 52: second industrial camera; 53: fourth drive motor; 54: support ridge; 6: inner hole detection unit; 61: third slide rail assembly; 62: fourth slide rail assembly; 63: fifth slide rail assembly; 64: fixing assembly; 65: sensor. DETAILED DESCRIPTION

[0067] The application will be further described below in connection with specific embodiments, but the embodiments of the application are not limited thereto.

[0068] Example 1

[0069] See Figure 1 , Figure 1 is a structural schematic diagram of an inner hole cylindrical body appearance and size detection device provided by the embodiments of the application.

[0070] The embodiment provides a kind of inner hole cylinder appearance and size detection device, including: mobile track unit 1, workpiece rotating mechanism 2, first end face detection unit 3, second end face detection unit 4, outer surface detection unit 5, inner hole detection unit 6 and control unit.Wherein, mobile track unit 1 is arranged along X axis direction.Workpiece rotating mechanism 2 is used to carry the workpiece to be measured, workpiece rotating mechanism 2 can rotate to drive the workpiece to be measured to rotate, and workpiece rotating mechanism 2 is movably connected mobile track unit 1, can move along mobile track unit 1.First end face detection unit 3 is erected in the upper of mobile track unit 1, for obtaining the image of the first end face of the workpiece to be measured.Second end face detection unit 4 is erected in the conveying end of mobile track unit 1, for obtaining the image of the second end face of the workpiece to be measured.The second end face of the workpiece to be measured is the end face with inner hole.Outer surface detection unit 5 is arranged in the side of mobile track unit 1, for obtaining the image of the outer surface of the workpiece to be measured.Inner hole detection unit 6 is arranged in the side of second end face detection unit 4 away from mobile track unit 1, for sending sensing signal to the bottom of inner hole and second end face, receiving the sensing signal returned by inner hole bottom and second end face, and obtaining the image of the side of inner hole and the bottom of inner hole.Control unit is electrically connected mobile track unit 1, workpiece rotating mechanism 2, first end face detection unit 3, second end face detection unit 4, outer surface detection unit 5 and inner hole detection unit 6, for detecting the appearance defect of the workpiece to be measured according to the image of the first end face of the workpiece to be measured, the image of the second end face of the workpiece to be measured, the image of the outer surface of the workpiece to be measured and the image of the side of inner hole, and the size of inner hole is obtained according to the sensing signal returned by inner hole bottom and second end face.

[0071] Specifically, when detecting the workpiece to be measured, workpiece rotating mechanism 2 carries the workpiece to be measured and moves to the first end face detection unit 3 and the second end face detection unit 4 between along the X axis, the first end face detection unit 3 and the second end face detection unit 4 respectively shoot the first end face and the second end face image of the workpiece to be measured, workpiece rotating mechanism 2 rotates, drives the workpiece to be measured to rotate, and outer surface detection unit 5 shoots the image of the outer surface of the workpiece to be measured when the workpiece to be measured rotates.Inner hole detection unit 6 sends sensing signal to the bottom of inner hole and second end face, receives the sensing signal returned by inner hole bottom and second end face, and shoots the image of the side and bottom of inner hole.Control unit detects the appearance defect of the workpiece to be measured according to the image of the first end face of the workpiece to be measured, the image of the second end face of the workpiece to be measured, the image of the outer surface of the workpiece to be measured and the image of the side of inner hole, and the size of inner hole is obtained according to the sensing signal returned by inner hole bottom and second end face, and the appearance and size detection of the workpiece to be measured is completed.

[0072] In the embodiment, in reference to Figure 2The moving track unit 1 comprises a conveying slide rail 11, a fixed slide rail 12 and a first driving motor 13. The conveying slide rail 11 is arranged along the X-axis direction and is slidably connected with the workpiece rotating mechanism 2. The fixed slide rail 12 is arranged parallel to the conveying slide rail 11 and is slidably connected with the workpiece rotating mechanism 2. The fixed slide rail 12 is provided with a plurality of fixing holes for fixing the workpiece rotating mechanism 2. The first driving motor 13 is fixed at the conveying end of the conveying slide rail 11 and is used to drive the workpiece rotating mechanism 2 to slide on the conveying slide rail 11 and the fixed slide rail 12.

[0073] Specifically, the conveying slide rail 11 and the fixed slide rail 12 are both arranged along the X direction. The workpiece rotating mechanism 2 is driven by the first driving motor 13 to slide on the conveying slide rail 11 and the fixed slide rail 12, so as to realize the movement of the workpiece to be tested along the X-axis direction.

[0074] In the embodiment, please refer to Figure 2 and Figure 3 The workpiece rotating mechanism 2 comprises a connecting plate 21, a fixed seat 22, a second driving motor 23, a belt pulley transmission assembly 24, a first rotating shaft 25 and a second rotating shaft 26. The connecting plate 21 is movably connected with the conveying slide rail 11 and the fixed slide rail 12 and can move along the conveying slide rail 11 and the fixed slide rail 12 under the driving of the second driving motor 23. The fixed seat 22 is fixedly connected with the connecting plate 21. The second driving motor 23 is fixed in the fixed seat 22. The belt pulley transmission assembly 24 comprises a driving pulley 241, a transmission belt 242, a first driven pulley 243 and a second driven pulley 244. The driving pulley 241 is connected with the output end of the second driving motor 23. The first driven pulley 243 and the second driven pulley 244 are arranged in parallel. The driving pulley 241 drives the first driven pulley 243 and the second driven pulley 244 to rotate through the transmission belt 242. The first rotating shaft 25 is arranged perpendicularly between the two ends of the fixed seat 22 and is fixedly connected with the first driven pulley 243 and can rotate under the driving of the first driven pulley 243. The second rotating shaft 26 is arranged parallel to the first rotating shaft 25 and is fixedly connected with the second driven pulley 244 and can rotate under the driving of the second driven pulley 244.

[0075] Specifically, the bottom of the connecting plate 21 is provided with a sliding groove matched with the transport slide rail 11 and the fixed slide rail 12, and the connecting plate 21 can move along the transport slide rail 11 and the fixed slide rail 12 under the driving of the second driving motor 23. The fixed seat 22 is fixed on the top of the connecting plate 21. The inside of the fixed seat 22 is a cavity, and the upper surface of the fixed seat 22 is hollowed out, and the side walls at both ends in the X-axis direction are provided with grooves, and the first rotating shaft 25 and the second rotating shaft 26 are fixed between the two ends of the fixed seat 22 in the X-axis direction, and the first rotating shaft 25 and the second rotating shaft 26 are located in the same horizontal plane and are located on the two sides of the grooves respectively. The distance from the first driven wheel 243 and the second driven wheel 244 to the driving wheel 241 is equal, that is, the driving wheel 241, the first driven wheel 243 and the second driven wheel 244 are arranged in an isosceles triangle, the driving wheel 241 is connected with the output end of the second driving motor 23, the first driven wheel 243 and the second driven wheel 244 are connected with the first rotating shaft 25 and the second rotating shaft 26 respectively, and the driving wheel 241 drives the first driven wheel 243 and the second driven wheel 244 to rotate synchronously through the transmission belt 242, and the first driven wheel 243 and the second driven wheel 244 drive the first rotating shaft 25 and the second rotating shaft 26 to rotate respectively. When detecting, the workpiece to be detected is placed on the first rotating shaft 25 and the second rotating shaft 26, and the first rotating shaft 25 and the second rotating shaft 26 drive the workpiece to be detected to rotate when rotating. In this embodiment, the pulley transmission assembly 24 further comprises a belt pressing wheel, and the fixed end of the belt pressing wheel is arranged at the bottom of the groove provided on the side wall of the fixed seat 22, and the wheel surface of the belt pressing wheel is pressed on the upper surface of the transmission belt 242, so that the transmission belt 242 has a recess between the first driven wheel 243 and the second driven wheel 244, so as to match the groove provided on the side wall of the fixed seat 22, and the surface of the workpiece to be detected can be attached to the first driven wheel 243 and the second driven wheel 244.

[0076] Specifically, please refer to Figure 4 , the first end face detection unit 3 comprises: a gantry 31, a first slide rail assembly 32, a third driving motor 33 and a first industrial camera 34. Wherein, the gantry 31 is erected above the moving rail unit 1. The fixed part of the first slide rail assembly 32 is fixedly connected with the gantry 31. The output end of the third driving motor 33 is connected with the sliding part of the first slide rail assembly 32, and drives the sliding part of the slide rail assembly 32 to move along the Y-axis direction. The first industrial camera 34 is fixedly connected with the sliding part of the first slide rail assembly 32, and can move along the Y-axis direction under the driving of the sliding part of the first slide rail assembly 32, and the first industrial camera 34 is used for shooting the image of the first end face of the workpiece to be detected.

[0077] In the embodiment, the middle axis of the gantry 31 is aligned with the middle axis of the workpiece rotating mechanism 2, the fixed part of the first slide rail assembly 32 is fixed at the middle part of the crossbeam of the gantry 31, and the sliding part of the first slide rail assembly 32 moves along the Y-axis direction. During detection, the sliding part of the first slide rail assembly 32 can be located at the center of the first end face of the workpiece by moving along the Y-axis direction. Further, the fixed part of the first slide rail assembly 32 is threadedly connected with the gantry 31, and the first industrial camera 34 can be adjusted in the Z-axis direction according to the actual working condition.

[0078] In an implementable manner, the gantry 31 is composed of two vertically placed aluminum profile frames and a horizontally placed aluminum profile frame, and the corners of the vertical aluminum profile frame and the horizontal aluminum profile frame are fixedly connected by two 6060 corner connectors.

[0079] In the embodiment, the structure of the second end face detection unit 4 is the same as that of the first end face detection unit 3, the second end face detection unit 4 and the first end face detection unit 3 are oppositely arranged, the gantry of the second end face detection unit 4 is arranged at the conveying end of the conveying slide rail 11, the industrial camera of the second end face detection unit 4 and the first industrial camera 34 are oppositely arranged, and the shooting direction of the industrial camera of the second end face detection unit 4 is the positive direction of the X-axis, and the shooting direction of the first industrial camera 34 is the negative direction of the X-axis.

[0080] Specifically, referring to Figure 5 , the outer surface detection unit 5 comprises a second slide rail assembly 51, a second industrial camera 52, a fourth driving motor 53 and a support ridge 54. The fixed part of the second slide rail assembly 51 is arranged at one side of the moving track unit 1 and located between the first end face detection unit 3 and the second end face detection unit 4. The second industrial camera 52 is fixedly connected with the sliding part of the second slide rail assembly 51 and can move along the Y-axis direction under the driving of the sliding part of the second slide rail assembly 51. The second industrial camera 52 is used for shooting the image of the outer surface of the workpiece. The output end of the fourth driving motor 53 is connected with the sliding part of the second slide rail assembly 51, and the fourth driving motor 53 drives the sliding part of the second slide rail assembly 51 to move along the Y-axis direction. The support ridge 54 is fixedly connected with the fixed part of the second slide rail assembly 51.

[0081] Specifically, the sliding part of the second slide rail assembly 51 moves along the Y-axis direction so that the second industrial camera 52 is aligned with the central axis of the workpiece to be measured. When the workpiece to be measured rotates, the second industrial camera 52 takes a picture to obtain an image of the outer surface of the workpiece to be measured. Optionally, when the workpiece to be measured rotates, the second industrial camera 52 takes multiple instantaneous photos, or the second industrial camera 52 takes a panoramic photo of the workpiece to be measured rotating one revolution. The support ridge 54 is used to further fix the fixed part of the second slide rail assembly 51. In one possible implementation, the first industrial camera 34, the second industrial camera 52, and the industrial camera of the second end face detection unit 4 are Hikvision industrial CS series area array cameras. In one possible implementation, the workpiece to be measured rotates 360 degrees, and the second industrial camera 52 takes 8 instantaneous photos, that is, the second industrial camera 52 takes a photo every 45 degrees of rotation of the workpiece to be measured.

[0082] Specifically, please refer to Figure 6 , the inner hole detection unit 6 includes: a third slide rail assembly 61, a fourth slide rail assembly 62, a fifth slide rail assembly 63, a fixed assembly 64, a sensor 65, and a shooting assembly. Wherein, the fixed part of the third slide rail assembly 61 is arranged on the side of the second end face detection unit 4 away from the moving rail unit 1, and the sliding part of the third slide rail assembly 61 can move along the X-axis direction. The fixed part of the fourth slide rail assembly 62 is fixedly connected to the sliding part of the third slide rail assembly 61, and can move along the X-axis direction under the driving of the sliding part of the third slide rail assembly 61. The sliding part of the fourth slide rail assembly 62 can move along the Z-axis direction. The fixed part of the fifth slide rail assembly 63 is fixedly connected to the sliding part of the fourth slide rail assembly 62, and can move along the Z-axis direction under the driving of the sliding part of the fourth slide rail assembly 62. The sliding part of the fifth slide rail assembly 63 can move along the Y-axis direction. The fixed assembly 64 is fixedly connected to the sliding part of the fifth slide rail assembly 63, and the fixed assembly 64 can approach or move away from the bottom of the inner hole under the driving of the sliding part of the third slide rail assembly 61. The sensor 65 is arranged at the end of the fixed assembly 64, and is used to send a sensing signal to the bottom of the inner hole and the second end face, and receive a sensing signal returned by the bottom of the inner hole and the second end face. The shooting assembly is arranged on the side of the fixed assembly 64, and is used to shoot an image of the bottom of the inner hole and an image of the side of the inner hole.

[0083] Specifically, the fourth slide rail assembly 62 and the fifth slide rail assembly 63 drive the sensor 65 and the photographing assembly to move along the Y-axis and the Z-axis, so that the sensor 65 and the photographing assembly are aligned with the inner hole, the third slide rail assembly 61 drives the sensor 65 and the photographing assembly to move along the X-axis, so that the sensor 65 and the photographing assembly enter the interior of the inner hole, the sensor 65 moves to a first preset position, sends a sensing signal to the bottom of the inner hole, receives a sensing signal returned by the bottom of the inner hole, and the photographing assembly acquires an image of the side surface of the inner hole and the bottom of the inner hole. After receiving the sensing signal returned by the bottom of the inner hole, the third slide rail assembly 61 drives the sensor 65 and the photographing assembly to move along the X-axis, so that the sensor 65 moves to a second preset position, the sensor 65 sends a sensing signal to the second end surface when at the second preset position, and receives a sensing signal returned by the second end surface. The control unit obtains the distance value L1 according to the sensing signal returned by the bottom of the inner hole, obtains the distance value L2 according to the sensing signal returned by the second end surface, and obtains the size of the inner hole according to the distance between the first preset position and the second preset position in the X-axis direction.

[0084] In the embodiment, the size of the inner hole is the depth, the distance between the first preset position and the second preset position in the X-axis direction is the travel value of the inner hole detection unit 6 along the X-axis direction when the inner hole detection unit 6 moves from the first preset position to the second preset position, and the distance between the first preset position and the bottom of the inner hole and the distance between the second preset position and the second end surface are within the effective measurement range of the sensor 65. It should be understood that, in order to enable the sensor 65 and the photographing assembly to enter the interior of the inner hole, the maximum size of the fixing assembly 64 along the Y-axis and the Z-axis direction is less than the diameter of the inner hole. In an implementable manner, the fixing assembly 64 is composed of a long rod and a square block fixed at the end of the long rod, the sensor 65 is fixed on the square block, and the photographing assembly is fixed on the long rod. The length of the long rod along the X-axis direction is 150-200 mm, the width of the long rod along the Y-axis direction is 40-60 mm, and the thickness of the long rod along the Z-axis direction is 5-10 mm. The side length of the square block along the Z-axis direction and the Y-axis direction is less than 30 mm, and the thickness of the square block along the X-axis direction is 5-10 mm. The sensor 65 is a depth laser sensor, and the photographing assembly is an endoscope. Exemplarily, the sensor 65 is a Keens CL-3000 series color laser coaxial displacement meter, and the photographing assembly is a Jietai industrial endoscope.

[0085] In the embodiment, the fixed part of the third slide rail assembly 61, the fixed part of the fourth slide rail assembly 62 and the fixed part of the fifth slide rail assembly 63 are all provided with displacement detection structures. Furthermore, the transport slide rail 11, the fixed part of the first slide rail assembly 32 and the fixed part of the second slide rail assembly 51 are all provided with displacement detection structures. The displacement detection structures are used to obtain the movement information of the slide rail. Exemplarily, the displacement detection structure comprises a grating and a photoelectric sensor. The reading head of the grating is installed on the fixed part of the slide rail assembly, and the scale of the grating is fixed on the sliding part of the slide rail assembly. When the sliding part of the slide rail assembly moves, the reading head and the scale grating also move relatively.

[0086] In an implementable manner, the inner hole cylindrical body appearance and size detection device further comprises a workbench. The workbench is used to carry the mobile rail unit 1, the workpiece rotating mechanism 2, the first end face detection unit 3, the second end face detection unit 4, the outer surface detection unit 5 and the inner hole detection unit 6. Specifically, the transport slide rail 11 and the fixed slide rail 12 are fixed on the workbench along the X-axis direction, and the first driving motor 13 is fixed on the conveying end of the transport slide rail 11. The bottom of the gantry 31, the bottom of the gantry in the second end face detection unit 4, the bottom of the fixed part of the second slide rail assembly 51, the bottom of the support ridge 54 and the bottom of the fixed part of the third slide rail assembly 61 are all fixed on the workbench.

[0087] The embodiment provides an inner hole cylindrical body appearance and size detection device. The workpiece rotating mechanism 2 carries the workpiece to be detected to move along the X-axis between the first end face detection unit 3 and the second end face detection unit 4. The first end face detection unit 3 and the second end face detection unit 4 respectively shoot the first end face image and the second end face image of the workpiece to be detected. The workpiece rotating mechanism 2 rotates to drive the workpiece to be detected to rotate. The outer surface detection unit 5 shoots the image of the outer surface of the workpiece to be detected when the workpiece rotates. The inner hole detection unit 6 sends a sensing signal to the bottom of the inner hole and the second end face. The sensing signal returned by the bottom of the inner hole and the second end face is received, and the image of the side and the bottom of the inner hole is shot. The control unit detects the appearance defects of the workpiece to be detected according to the first end face image of the workpiece to be detected, the second end face image of the workpiece to be detected, the image of the outer surface of the workpiece to be detected and the image of the side of the inner hole. The size of the inner hole is obtained according to the sensing signal returned by the bottom of the inner hole and the second end face, and the appearance and size detection of the workpiece to be detected is completed. The detection device can realize the full-automatic detection of the inner hole cylindrical body, reduces the manual intervention, significantly improves the detection efficiency, ensures the accurate detection of the appearance and size of the inner hole cylindrical body, greatly reduces the error rate, realizes the comprehensive detection of the inner hole cylindrical body, ensures the omnibearing quality control of the product and meets the detection requirements of modern manufacturing industry on high-quality products.

[0088] Embodiment two

[0089] The embodiment provides a hole cylinder appearance and size detection method, which is used for a hole cylinder appearance and size detection device provided in the embodiment one and comprises the following steps.

[0090] Step one: control the workpiece rotating mechanism 2 to carry the workpiece to be detected to move along the moving track unit 1 to between the first end surface detection unit 3 and the second end surface detection unit 4.

[0091] Specifically, the device is started, the workpiece to be detected is placed on the first rotating shaft 25 and the second rotating shaft 26, the first driving motor 13 is started, and the workpiece rotating mechanism 2 carrying the workpiece to be detected moves along the conveying slide rail 11 and the fixed slide rail 12 to between the first end surface detection unit 3 and the second end surface detection unit 4.

[0092] Step two: control the second end surface detection unit 4 to obtain the image of the second end surface of the workpiece to be detected.

[0093] Specifically, the industrial camera in the second end surface detection unit 4 is controlled to move along Y to a preset shooting position, and then the image of the second end surface of the workpiece to be detected is shot. After shooting, the slide rail assembly in the second end surface detection unit 4 is controlled to rise along the Y axis to the maximum height.

[0094] Step three: control the hole detection unit 6 to send a sensing signal to the bottom of the hole and the second end surface, receive the sensing signal returned by the bottom of the hole and the second end surface, and obtain the image of the side surface of the hole and the bottom of the hole.

[0095] In the embodiment, step three comprises:

[0096] The hole detection unit 6 is controlled to send a sensing signal to the bottom of the hole when at the first preset position, receive the sensing signal returned by the bottom of the hole, and obtain the image of the side surface of the hole and the bottom of the hole. The hole detection unit 6 is controlled to send a sensing signal to the second end surface when at the second preset position, and receive the sensing signal returned by the second end surface.

[0097] Specifically, the first drive motor 13 is activated, causing the workpiece rotation mechanism 2, carrying the workpiece to be tested, to move along the transport slide rail 11 and the fixed slide rail 12 to the transport end of the transport slide rail 11. The fourth slide rail assembly 62 and the fifth slide rail assembly 63 drive the sensor 65 and the imaging assembly to move along the Y and Z axes, aligning the sensor 65 and the imaging assembly with the inner hole. The third slide rail assembly 61 drives the sensor 65 and the imaging assembly to move along the X axis, allowing the sensor 65 and the imaging assembly to enter the interior of the inner hole. When the sensor 65 moves to the first preset position, it sends a sensing signal to the bottom of the inner hole and receives the sensing signal returned from the bottom of the inner hole. After receiving the sensing signal returned from the bottom of the inner hole, the imaging assembly captures an image of the bottom of the inner hole. After the image of the bottom of the inner hole is completed, the second drive motor 23 is activated, causing the workpiece to be tested to rotate. While the workpiece is rotating, the imaging assembly captures an image of the side of the inner hole. The control system 61 moves the sensor 65 and the imaging component along the X-axis, causing the sensor 65 to move to a second preset position. At this second preset position, the sensor 65 sends a sensing signal to the second end face and receives a sensing signal returned from the second end face. In this embodiment, the distance between the first preset position and the bottom of the inner hole, as well as the distance between the second preset position and the second end face, are within the effective measurement range of the sensor 65.

[0098] Step 4: Control the first end face detection unit 3 to acquire an image of the first end face of the workpiece to be tested.

[0099] Specifically, the first drive motor 13 is activated, causing the workpiece rotation mechanism 2, carrying the workpiece to be tested, to move along the transport slide rail 11 and the fixed slide rail 12 to between the first end face detection unit 3 and the second end face detection unit 4. The sliding part of the first slide rail assembly 32 is controlled along the Y-axis direction, causing the first industrial camera 34 to move to a preset shooting position and capture an image of the first end face of the workpiece to be tested. After the image is captured, the sliding part of the first slide rail assembly 32 is controlled to rise to its maximum height along the Y-axis.

[0100] Step 5: Control the outer surface detection unit 5 to acquire an image of the outer surface of the workpiece to be tested.

[0101] Specifically, the second drive motor 23 is turned on to make the workpiece under test rotate. While the workpiece under test is rotating, the second industrial camera 52 takes pictures to obtain an image of the outer surface of the workpiece under test.

[0102] Step 6: Detect the appearance defects of the workpiece under test based on the images of the first end face, the second end face, the outer surface, and the side of the inner hole. Obtain the size of the inner hole based on the sensor signals returned from the bottom and the second end face.

[0103] Specifically, the size of the inner hole is L=L1-L2+L3. Wherein, L1 is the distance value obtained according to the sensing signal returned by the bottom of the inner hole. L2 is the distance value obtained according to the sensing signal returned by the second end face. L3 is the travel value of the inner hole detection unit 6 along the X-axis direction when the inner hole detection unit 6 moves from the first preset position to the second preset position. In this embodiment, the size of the inner hole is the depth, and the travel value of the inner hole detection unit 6 along the X-axis direction when the inner hole detection unit 6 moves from the first preset position to the second preset position is the distance of the X-axis direction between the first preset position and the second preset position.

[0104] The method for detecting the appearance and size of the inner hole cylinder provided in the embodiment detects the appearance defects of the workpiece to be detected by acquiring the image of the first end face of the workpiece to be detected, the image of the second end face of the workpiece to be detected, the image of the outer surface of the workpiece to be detected and the image of the side of the inner hole, and obtains the size of the inner hole according to the sensing signals returned by the bottom of the inner hole and the second end face, thereby completing the appearance and size detection of the workpiece to be detected. The detection method is used in an automatic detection device, can realize full-automatic detection of the inner hole cylinder, reduces manual intervention, significantly improves the detection efficiency, ensures accurate detection of the appearance and size of the inner hole cylinder, greatly reduces the error rate, realizes comprehensive detection of the inner hole cylinder, ensures overall quality control of the product, and meets the detection requirements of modern manufacturing industry for high-quality products.

[0105] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. An apparatus for inspecting the appearance and dimensions of an inner hole cylinder, characterized by comprising: The device comprises a moving track unit (1), a workpiece rotating mechanism (2), a first end face detection unit (3), a second end face detection unit (4), an outer surface detection unit (5), an inner hole detection unit (6) and a control unit, wherein, The moving track unit (1) is arranged along the X-axis direction; The workpiece rotating mechanism (2) is used for carrying a workpiece to be detected and can rotate to drive the workpiece to rotate, and the workpiece rotating mechanism (2) is movably connected to the moving track unit (1) and can move along the moving track unit (1); The first end face detection unit (3) is arranged above the moving track unit (1) and is used for acquiring an image of a first end face of the workpiece to be detected; The second end face detection unit (4) is arranged at a conveying end of the moving track unit (1) and is used for acquiring an image of a second end face of the workpiece to be detected, wherein the second end face of the workpiece to be detected is an end face with an inner hole; The outer surface detection unit (5) is arranged at one side of the moving track unit (1) and is used for acquiring an image of an outer surface of the workpiece to be detected; The inner hole detection unit (6) is arranged at a side of the second end face detection unit (4) away from the moving track unit (1) and is used for sending a sensing signal to the bottom of the inner hole and the second end face, receiving a sensing signal returned by the bottom of the inner hole and the second end face, and acquiring an image of a side surface of the inner hole and an image of the bottom of the inner hole; The control unit is electrically connected to the moving track unit (1), the workpiece rotating mechanism (2), the first end face detection unit (3), the second end face detection unit (4), the outer surface detection unit (5) and the inner hole detection unit (6) and is used for detecting appearance defects of the workpiece to be detected according to the image of the first end face of the workpiece to be detected, the image of the second end face of the workpiece to be detected, the image of the outer surface of the workpiece to be detected, the image of the side surface of the inner hole and the image of the bottom of the inner hole, and obtaining the size of the inner hole according to the sensing signal returned by the bottom of the inner hole and the second end face. The moving track unit (1) comprises a conveying slide rail (11), a fixed slide rail (12) and a first driving motor (13), wherein, 2. The device for inspecting the appearance and dimensions of an inner cylindrical body according to claim 1, characterized in that, The conveying slide rail (11) is arranged along the X-axis direction and is slidably connected to the workpiece rotating mechanism (2); The fixed slide rail (12) is arranged parallel to the conveying slide rail (11) and is slidably connected to the workpiece rotating mechanism (2), and a plurality of fixing holes for fixing the workpiece rotating mechanism (2) are formed in the fixed slide rail (12); The first driving motor (13) is fixed at a conveying end of the conveying slide rail (11) and is used for driving the workpiece rotating mechanism (2) to slide on the conveying slide rail (11) and the fixed slide rail (12). The workpiece rotating mechanism (2) comprises a connecting plate (21), a fixing seat (22), a second driving motor (23), a belt pulley transmission assembly (24), a first rotating shaft (25) and a second rotating shaft (26), wherein, 3. The device for inspecting the appearance and dimensions of an inner cylindrical body according to claim 2, characterized in that, ​ The connecting plate (21) movably connects the transport slide rail (11) and the fixed slide rail (12), and can move along the transport slide rail (11) and the fixed slide rail (12) under the driving of the second driving motor (23); The fixed seat (22) is fixedly connected with the connecting plate (21); The second driving motor (23) is fixed in the fixed seat (22); The belt wheel transmission assembly (24) comprises: a driving wheel (241), a transmission belt (242), a first driven wheel (243) and a second driven wheel (244), the driving wheel (241) is connected with the output end of the second driving motor (23), the first driven wheel (243) and the second driven wheel (244) are arranged in parallel, and the driving wheel (241) drives the first driven wheel (243) and the second driven wheel (244) to rotate through the transmission belt (242); The first rotating shaft (25) is vertically arranged between the two ends of the fixed seat (22), and the first rotating shaft (25) is fixedly connected with the first driven wheel (243) and can rotate under the driving of the first driven wheel (243); The second rotating shaft (26) is arranged in parallel with the first rotating shaft (25), and the second rotating shaft (26) is fixedly connected with the second driven wheel (244) and can rotate under the driving of the second driven wheel (244).

4. The device for inspecting the appearance and dimensions of an inner cylindrical body according to claim 1, characterized in that, The first end surface detection unit (3) comprises: a gantry (31), a first slide rail assembly (32), a third driving motor (33) and a first industrial camera (34), wherein, The gantry (31) is arranged above the moving track unit (1); The fixed part of the first slide rail assembly (32) is fixedly connected with the gantry (31); The output end of the third driving motor (33) is connected with the sliding part of the first slide rail assembly (32), and drives the sliding part of the slide rail assembly (32) to move along the Y-axis direction; The first industrial camera (34) is fixedly connected with the sliding part of the first slide rail assembly (32) and can move along the Y-axis direction under the driving of the sliding part of the first slide rail assembly (32), and the first industrial camera (34) is used for shooting the image of the first end surface of the workpiece to be detected.

5. The device for inspecting the appearance and dimensions of an inner cylindrical body according to claim 1, characterized in that, The outer surface detection unit (5) comprises: a second slide rail assembly (51), a second industrial camera (52), a fourth driving motor (53) and a support ridge (54), wherein, The fixed part of the second slide rail assembly (51) is arranged on one side of the moving track unit (1) and located between the first end surface detection unit (3) and the second end surface detection unit (4); The second industrial camera (52) is fixedly connected with the sliding part of the second slide rail assembly (51) and can move along the Y-axis direction under the driving of the sliding part of the second slide rail assembly (51), and the second industrial camera (52) is used for shooting the image of the outer surface of the workpiece to be detected. The output end of the fourth driving motor (53) is connected with the sliding part of the second slide rail assembly (51), and drives the sliding part of the second slide rail assembly (51) to move along the Y-axis direction; The support ridge (54) is fixedly connected with the fixed part of the second slide rail assembly (51).

6. The device for inspecting the appearance and dimensions of an inner cylindrical body according to claim 1, characterized in that, The inner hole detection unit (6) comprises a third slide rail assembly (61), a fourth slide rail assembly (62), a fifth slide rail assembly (63), a fixing assembly (64), a sensor (65) and a shooting assembly, wherein, The fixed part of the third slide rail assembly (61) is arranged on the side of the second end face detection unit (4) away from the moving track unit (1), and the sliding part of the third slide rail assembly (61) can move along the X-axis direction; The fixed part of the fourth slide rail assembly (62) is fixedly connected with the sliding part of the third slide rail assembly (61) and can move along the X-axis direction under the driving of the sliding part of the third slide rail assembly (61), and the sliding part of the fourth slide rail assembly (62) can move along the Z-axis direction; The fixed part of the fifth slide rail assembly (63) is fixedly connected with the sliding part of the fourth slide rail assembly (62) and can move along the Z-axis direction under the driving of the sliding part of the fourth slide rail assembly (62), and the sliding part of the fifth slide rail assembly (63) can move along the Y-axis direction; The fixing assembly (64) is fixedly connected with the sliding part of the fifth slide rail assembly (63), and the fixing assembly (64) can approach or move away from the bottom of the inner hole under the driving of the sliding part of the third slide rail assembly (61); The sensor (65) is arranged at the end of the fixing assembly (64) and is used for sending sensing signals to the bottom of the inner hole and the second end face and receiving the sensing signals returned by the bottom of the inner hole and the second end face; The shooting assembly is arranged on the side of the fixing assembly (64) and is used for shooting the image of the bottom of the inner hole and the image of the side of the inner hole.

7. The device for inspecting the appearance and dimensions of an inner cylindrical body according to claim 6, characterized in that, The fixed part of the third slide rail assembly (61), the fixed part of the fourth slide rail assembly (62) and the fixed part of the fifth slide rail assembly (63) are all provided with displacement detection structures.

8. The apparatus for inspecting the appearance and dimensions of an inner cylindrical body according to claim 1, characterized in that, Further comprising a workbench; The workbench is used for carrying the moving track unit (1), the workpiece rotating mechanism (2), the first end face detection unit (3), the second end face detection unit (4), the outer surface detection unit (5) and the inner hole detection unit (6).

9. A method of inspecting the appearance and dimensions of an internal cylindrical body, characterized in that, A kind of inner hole cylinder appearance and size detection device for any one of claims 1-8, comprising: Control the workpiece rotating mechanism (2) to carry the workpiece to be measured to move to the first end face detection unit (3) and the second end face detection unit (4) along the moving track unit (1); Control the first end face detection unit (3) to obtain the image of the first end face of the workpiece to be measured; Control the second end face detection unit (4) to obtain the image of the second end face of the workpiece to be measured; Control the outer surface detection unit (5) to obtain the image of the outer surface of the workpiece to be measured; The inner hole detection unit (6) is controlled to send a sensing signal to the bottom of the inner hole and the second end face, receive a sensing signal returned by the bottom of the inner hole and the second end face, and acquire an image of the side surface of the inner hole and the bottom of the inner hole; According to the image of the first end face of the workpiece to be detected, the image of the second end face of the workpiece to be detected, the image of the outer surface of the workpiece to be detected, the image of the side surface of the inner hole and the image of the bottom of the inner hole, the appearance defect of the workpiece to be detected is detected, and the size of the inner hole is obtained according to the sensing signal returned by the bottom of the inner hole and the second end face.

10. The method of claim 9, wherein The inner hole detection unit (6) is controlled to send a sensing signal to the bottom of the inner hole and the second end face, receive a sensing signal returned by the bottom of the inner hole and the second end face, and acquire an image of the side surface of the inner hole and the bottom of the inner hole; The inner hole detection unit (6) is controlled to send a sensing signal to the bottom of the inner hole and the second end face, receive a sensing signal returned by the bottom of the inner hole and the second end face, and acquire an image of the side surface of the inner hole and the bottom of the inner hole; The size of the inner hole L=L1-L2+L3; wherein, L1 is a distance value obtained according to the sensing signal returned by the bottom of the inner hole; L2 is a distance value obtained according to the sensing signal returned by the second end face; L3 is the travel value of the inner hole detection unit (6) along the X-axis direction when the inner hole detection unit (6) moves from the first preset position to the second preset position.

Images