Automatic magnetic powder detection system and method for camshaft

Abstract

The automatic magnetic powder detection system comprises a magnetic powder inspection mechanism, a carrying mechanism and a detection mechanism, and through cooperation of the magnetic powder inspection mechanism, the carrying mechanism and the detection mechanism, the carrying mechanism picks up a camshaft assembly and carries the picked camshaft assembly to the magnetic powder inspection mechanism; the magnetization assembly receives the camshaft assembly carried by the carrying mechanism and magnetizes a to-be-detected camshaft on the camshaft assembly, the magnetic liquid spraying assembly sprays magnetic powder liquid on the surface of the to-be-detected camshaft of the camshaft assembly, and the detection mechanism carries out photographing detection on the magnetized camshaft sprayed with the magnetic powder liquid. The distribution information of the fluorescent magnetic powder liquid on the surface of the cam shaft is recorded, automatic detection of the cam shaft is achieved, the equipment can continuously operate for a long time, frequent manual intervention is not needed, the production efficiency and the detection efficiency are improved, and errors and inconsistency possibly caused by manual operation are reduced.

Description

Technical Field

[0001] The invention belongs to the field of automobile parts detection, and in particular relates to an automatic magnetic powder detection system and method for a camshaft. Background Art

[0002] With the rapid development of the automobile industry, the performance and reliability of the engine have become key factors to ensure the safety and stable operation of the vehicle. As an important component of the engine, the camshaft is responsible for controlling the opening and closing of the valve. Its structure is complex and it is subject to large mechanical stress. In the process of producing new camshafts, due to the influence of processing technology, material properties and mechanical stress, microcracks may have occurred in the manufacturing stage, causing significant economic losses and triggering public doubts about product quality. Therefore, it is extremely necessary to implement microcrack prevention of new camshafts.

[0003] Commonly used inspection methods include visual inspection, ultrasonic inspection, and magnetic particle inspection. Although visual inspection is simple and easy, it has limited ability to identify tiny cracks and is prone to missed detection. Ultrasonic testing has high penetration ability, but it is not effective for parts with complex shapes and surface conditions, and the equipment cost is high. X-ray inspection can provide clearer images of internal structures, but its operation is cumbersome and there are radiation safety risks, which limits its practical application. Eddy current testing is effective for conductive materials, but it is difficult to apply to non-conductive materials or parts with thick coatings. Although the existing inspection methods have their own strengths, they still have limitations in the detection of microcracks in new camshafts.

[0004] Among the many inspection methods, magnetic particle inspection is highly favored due to its many advantages. Magnetic particle inspection can adapt well to the complex shape of the camshaft and can complete the inspection of a large surface area in a relatively short time, which is suitable for mass production. This method has a high sensitivity to tiny cracks and can effectively detect surface and near-surface defects, especially in parts with complex geometries.

[0005] However, there are still some unresolved problems in practical applications. Existing magnetic particle inspection equipment often requires manual operation and judgment, which reduces the inspection efficiency and consistency, and may even result in missed inspections due to negligence, which urgently needs to be solved. Summary of the invention

[0006] The object of the present invention is to provide an automated magnetic particle inspection system and method for a camshaft, so as to solve the problem that conventional magnetic particle inspection equipment in the prior art requires manual operation and judgment, resulting in low inspection efficiency.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, an automated magnetic particle inspection system for a camshaft is provided, which includes a magnetic particle inspection mechanism, a transport mechanism, and a detection mechanism, wherein:

[0009] The transport mechanism is configured to pick up a camshaft assembly and transport the picked-up camshaft assembly to the magnetic particle flaw detection mechanism, wherein the camshaft assembly includes a camshaft to be inspected;

[0010] The magnetic particle flaw detection mechanism comprises a magnetizing component and a magnetic liquid spraying component, wherein the magnetizing component is configured to receive the camshaft component transported by the transport mechanism and magnetize the camshaft to be inspected on the camshaft component, and the magnetic liquid spraying component is arranged on one side of the magnetizing component, and the magnetic liquid spraying component is configured to spray magnetic powder liquid on the surface of the camshaft to be inspected of the camshaft component;

[0011] The detection mechanism is configured to perform photographic detection on the camshaft after magnetization and spraying with magnetic powder liquid, so as to record the distribution information of the fluorescent magnetic powder particles on the surface of the camshaft.

[0012] Furthermore, the camshaft assembly includes a clamping jig and a clamping unit, the clamping unit includes two clamping members rotatably arranged at preset positions of the clamping jig, and the two ends of the camshaft to be tested are rotatably arranged on the clamping jig through each of the clamping members, and the two ends of the camshaft to be tested are coaxially connected to the corresponding clamping members.

[0013] Furthermore, the magnetization assembly includes a magnetization platform, a magnetization unit and a rotation drive member, wherein:

[0014] The magnetized platform is configured to carry the camshaft assembly carried by the carrying mechanism;

[0015] The magnetizing unit comprises two magnetizing electrodes arranged on the magnetizing platform at intervals in the horizontal direction, each of the magnetizing electrodes is arranged corresponding to one end of the camshaft to be detected, and the magnetizing electrode is configured to abut against the corresponding clamping member when the camshaft assembly is located on the magnetizing platform and magnetize the camshaft to be detected, and the clamping member is made of metal material;

[0016] The driving end of the rotating driving member is connected to one or two of the magnetized electrodes, and the rotating driving member is configured to drive one or two of the magnetized electrodes to rotate axially when the magnetic liquid spraying assembly sprays magnetic powder liquid on the surface of the camshaft to be inspected, so as to drive the camshaft to be inspected to rotate axially through the two clamping members.

[0017] Furthermore, a positioning component is provided on the magnetizing platform, and the positioning component is configured to fix the clamping fixture located on the magnetizing platform at a preset position to position the camshaft to be inspected.

[0018] Furthermore, the automated magnetic particle inspection system for camshafts also includes a storage platform, on which a loading station and a sorting station are provided, the loading station being configured to place a number of camshaft assemblies to be picked up, and the sorting station having a qualified area for placing qualified camshafts and an unqualified area for placing unqualified camshafts.

[0019] Furthermore, the transport mechanism is also configured to pick up the inspected camshaft assembly and transport it to the qualified area or the unqualified area according to the inspection result of the inspection mechanism.

[0020] Furthermore, the transport mechanism includes a transport drive and a clamping assembly, the driving end of the transport drive is connected to the clamping assembly, the clamping assembly is configured to clamp or lower the camshaft assembly, the transport drive is configured to cooperate with the clamping assembly to clamp the camshaft assembly located at the loading station and then transport it to a preset position of the magnetic particle flaw detection mechanism and then lower it, or is configured to clamp the camshaft assembly after inspection at the magnetic particle flaw detection mechanism and then transport it to the sorting station according to the inspection result of the inspection mechanism and in cooperation with the clamping assembly.

[0021] Further, the clamping assembly includes a clamping frame, a clamping drive, a first clamping portion and a second clamping portion, the driving end of the transport drive is connected to the clamping frame, the first clamping portion and the second clamping portion can be arranged on the clamping frame to be close to or away from each other, the fixed end of the clamping drive is installed on the clamping frame, the driving end of the clamping drive is connected to the first clamping portion and / or the second clamping portion, and the clamping drive is configured to drive the first clamping portion and the second clamping portion to be close to or away from each other;

[0022] The clamping driving member drives the first clamping portion and the second clamping portion to approach each other to clamp the camshaft assembly;

[0023] The clamping driving member drives the first clamping portion and the second clamping portion to move away from each other so as to put down the camshaft assembly.

[0024] Furthermore, the detection mechanism includes a detection frame and a detection component, wherein:

[0025] The detection frame is arranged on one side of the magnetic particle flaw detection mechanism, and the detection component includes a plurality of photographic detection units, which are arranged in an axial array along the camshaft to be detected. Each of the photographic detection units includes an industrial camera and a plurality of positioning light sources evenly distributed around the industrial camera. The industrial camera cooperates with the corresponding positioning light source to perform photographic detection on the camshaft to record the distribution information of the fluorescent magnetic powder particles on the surface of the camshaft.

[0026] In a second aspect, an automated magnetic particle inspection method is provided, which is implemented by the automated magnetic particle inspection system for a camshaft, and includes the following steps:

[0027] The transport mechanism picks up the camshaft assembly and transports the picked-up camshaft assembly to the magnetic particle flaw detection mechanism;

[0028] The magnetizing assembly receives the camshaft assembly carried by the carrying mechanism and magnetizes the camshaft to be tested on the camshaft assembly;

[0029] The magnetic liquid spraying assembly sprays magnetic powder liquid on the surface of the camshaft to be inspected of the camshaft assembly;

[0030] The detection mechanism takes photos and detects the camshaft after magnetization and spraying with magnetic powder liquid, and records the distribution information of fluorescent magnetic powder particles on the surface of the camshaft.

[0031] Compared with the prior art, the automated magnetic particle inspection system for camshafts has the following beneficial effects:

[0032] 1) Through the cooperation of the magnetic particle flaw detection mechanism, the conveying mechanism and the detection mechanism, the conveying mechanism picks up the camshaft assembly and conveys the picked-up camshaft assembly to the magnetic particle flaw detection mechanism, the magnetizing assembly receives the camshaft assembly conveyed by the conveying mechanism and magnetizes the camshaft to be detected on the camshaft assembly, the magnetic liquid spraying assembly sprays magnetic powder liquid on the surface of the camshaft to be detected of the camshaft assembly, the detection mechanism takes pictures and detects the camshaft after magnetization and spraying with magnetic powder liquid, and records the distribution information of the fluorescent magnetic powder liquid on the surface of the camshaft, thereby realizing the automatic detection of the camshaft. The equipment can run continuously for a long time without frequent manual intervention, which not only improves the production efficiency and detection efficiency, but also reduces the errors and inconsistencies that may be caused by manual operation.

[0033] 2) Through the coordination of the positioning component, the magnetization unit and the rotary drive, the camshaft can be precisely positioned while taking into account the magnetization and rotation of the camshaft, ensuring that the parts of the magnetic liquid spraying component will not be touched during the positioning and clamping and handling process, avoiding the formation of unnecessary magnetic marks. It effectively reduces the interference with the test results, and can magnetize in both the axial and circumferential directions to ensure the accuracy of the test process. Through precise clamping and rotation, the entire camshaft can be evenly sprayed with magnetic powder liquid, reducing the potential risks caused by inaccurate detection.

[0034] 3) The industrial camera and positioning light source are arranged in the axial array of the camshaft. Based on the rotation of the camshaft, the entire camshaft can be recorded by the industrial camera. The positioning light source is evenly distributed around the industrial camera to ensure that the positioning light source is evenly distributed during the irradiation of the camshaft, further improving the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following briefly introduces the background technology of the present invention and the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0036] Figure 1 It is a schematic diagram of the three-dimensional structure of an automated magnetic particle inspection system for a camshaft provided by an embodiment of the present invention;

[0037] Figure 2 It is another three-dimensional structural schematic diagram of an automated magnetic particle inspection system for a camshaft provided by an embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of the three-dimensional structure of a camshaft assembly provided by an embodiment of the present invention;

[0039] Figure 4 is a partial schematic diagram of a detection mechanism provided by an embodiment of the present invention;

[0040] Figure 5 It is a schematic diagram of the detection process of an automated magnetic particle detection system for a camshaft provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0042] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood. It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can also be a central component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0043] See also Figures 1 to 5 As shown, in this embodiment, an automated magnetic particle inspection system for a camshaft includes a magnetic particle inspection mechanism 1, a conveying mechanism 2 and a detection mechanism 3, wherein: the conveying mechanism 2 is configured to pick up a camshaft assembly 4 and transport the picked-up camshaft assembly 4 to the magnetic particle inspection mechanism 1, and the camshaft assembly 4 includes a camshaft 40 to be inspected; the magnetic particle inspection mechanism 1 includes a magnetization component and a magnetic liquid spraying component 12, the magnetization component is configured to receive the camshaft assembly 4 transported by the conveying mechanism 2 and magnetize the camshaft 40 to be inspected on the camshaft assembly 4, the magnetic liquid spraying component 12 is arranged on one side of the magnetization component, and the magnetic liquid spraying component 12 is configured to spray magnetic powder liquid on the surface of the camshaft 40 to be inspected of the camshaft assembly 4; the detection mechanism 3 is configured to perform photographic inspection on the camshaft after magnetization and sprayed with magnetic powder liquid, so as to record the distribution information of the fluorescent magnetic powder particles on the surface of the camshaft.

[0044] It can be seen that through the cooperation of the magnetic particle flaw detection mechanism 1, the conveying mechanism 2 and the detection mechanism 3, the conveying mechanism 2 picks up the camshaft assembly 4 and conveys the picked up camshaft assembly 4 to the magnetic particle flaw detection mechanism 1, the magnetizing assembly receives the camshaft assembly 4 conveyed by the conveying mechanism 2 and magnetizes the camshaft 40 to be detected on the camshaft assembly 4, the magnetic liquid spraying assembly 12 sprays magnetic powder liquid on the surface of the camshaft 40 to be detected of the camshaft assembly 4, the detection mechanism 3 takes pictures to detect the camshaft after magnetization and spraying with magnetic powder liquid, and records the distribution information of the fluorescent magnetic powder liquid on the surface of the camshaft, thereby realizing the automatic detection of the camshaft. The equipment can operate continuously for a long time without frequent manual intervention, which not only improves the production efficiency and detection efficiency, but also reduces the errors and inconsistencies that may be caused by manual operation.

[0045] As an embodiment, the camshaft assembly 4 includes a clamping fixture 41 and a clamping unit, the clamping unit includes two clamping members 42 rotatably arranged at preset positions of the clamping fixture 41, and the two ends of the camshaft 40 to be tested are rotatably arranged on the clamping fixture 41 through a clamping member 42 respectively, and the two ends of the camshaft 40 to be tested are coaxially connected to the corresponding clamping members 42.

[0046] As an embodiment, the magnetization assembly includes a magnetization platform 10, a magnetization unit and a rotating drive member, wherein: the magnetization platform 10 is configured to carry the camshaft assembly 4 carried by the carrying mechanism 2; the magnetization unit includes two magnetization electrodes 11 arranged on the magnetization platform 10 at intervals in the horizontal direction, each magnetization electrode 11 is arranged corresponding to one end of the camshaft 40 to be detected, and the magnetization electrode 11 is configured to abut against the corresponding clamping member 42 when the camshaft assembly 4 is located on the magnetization platform 10 and magnetize the camshaft 40 to be detected, and the clamping member 42 is made of metal material; the driving end of the rotating drive member is connected to one or two of the magnetization electrodes 11, and the rotating drive member is configured to drive one or two of the magnetization electrodes 11 to rotate axially when the magnetic liquid spraying assembly 12 sprays magnetic powder liquid on the surface of the camshaft 40 to be detected, so as to drive the camshaft 40 to be detected to rotate axially through the two clamping members 42.

[0047] As an implementation manner, a positioning assembly 5 is disposed on the magnetizing platform 10 , and the positioning assembly 5 is configured to fix a clamping fixture 41 located on the magnetizing platform 10 at a preset position to position the camshaft 40 to be inspected.

[0048] Specifically, the positioning assembly 5 includes two positioning protrusions, and the two positioning protrusions are arranged at an interval to form a positioning area that conforms to the shape of the clamping fixture 41. During positioning, the bottom of the clamping fixture 41 is located in the positioning area.

[0049] It can be seen that through the cooperation of the positioning component 5, the magnetization unit and the rotating drive, the camshaft can be precisely positioned while taking into account the magnetization and rotational movement of the camshaft, ensuring that the part of the magnetic liquid spraying component 12 will not be touched during the positioning and clamping and handling process, avoiding the formation of unnecessary magnetic marks. It effectively reduces the interference with the test results, and can magnetize in both the axial and circumferential directions to ensure the accuracy of the test process. Through precise clamping and rotational movement, it is ensured that the entire camshaft can be evenly sprayed with magnetic powder liquid, reducing the potential risks caused by inaccurate detection.

[0050] As an embodiment, an automated magnetic particle inspection system for camshafts also includes a storage platform 6, on which a loading station 60 and a sorting station 61 are provided. The loading station 60 is configured to place a number of camshaft assemblies 4 to be picked up, and the sorting station 61 has a qualified area for placing qualified camshafts and an unqualified area for placing unqualified camshafts.

[0051] As an embodiment, the transport mechanism 2 is further configured to pick up the inspected camshaft assembly 4 and transport it to a qualified area or an unqualified area according to the inspection result of the inspection mechanism 3 .

[0052] As an embodiment, the conveying mechanism 2 includes a conveying drive 20 and a clamping assembly 21. The driving end of the conveying drive 20 is connected to the clamping assembly 21. The clamping assembly 21 is configured to clamp or put down the camshaft assembly 4. The conveying drive 20 is configured to cooperate with the clamping assembly 21 to clamp the camshaft assembly 4 located at the loading station 60 and then convey it to a preset position of the magnetic particle flaw detection mechanism 1 and put it down, or is configured to clamp the camshaft assembly 4 located at the magnetic particle flaw detection mechanism 1 after inspection according to the inspection result of the inspection mechanism 3 and cooperate with the clamping assembly 21 to convey it to the sorting station 61.

[0053] As an embodiment, the clamping assembly 21 includes a clamping frame, a clamping drive, a first clamping part and a second clamping part. The driving end of the transport drive 20 is connected to the clamping frame, and the first clamping part and the second clamping part can be arranged on the clamping frame close to or far away from each other. The fixed end of the clamping drive is installed on the clamping frame, and the driving end of the clamping drive is connected to the first clamping part and / or the second clamping part. The clamping drive is configured to drive the first clamping part and the second clamping part to move closer to or away from each other; the clamping drive drives the first clamping part and the second clamping part to move closer to each other to clamp the camshaft assembly 4; the clamping drive drives the first clamping part and the second clamping part to move away from each other to lower the camshaft assembly 4.

[0054] As an embodiment, the detection mechanism 3 includes a detection frame 30 and a detection component 31, wherein: the detection frame 30 is arranged on one side of the magnetic particle flaw detection mechanism 1, and the detection component 31 includes a plurality of photographic detection units, and the plurality of photographic detection units are arranged in an axial array along the camshaft 40 to be detected, and each photographic detection unit includes an industrial camera 310 and a plurality of positioning light sources 311 evenly distributed around the industrial camera 310, and the industrial camera 310 cooperates with the corresponding positioning light source 311 to perform photographic detection on the camshaft to record the distribution information of the fluorescent magnetic powder particles on the surface of the camshaft.

[0055] It can be seen that the industrial camera 310 and the positioning light source 311 are arranged in an axial array according to the camshaft, and on the basis of the rotational movement of the camshaft, the entire camshaft can be recorded by the industrial camera 310. The positioning light source 311 is evenly distributed around the industrial camera 310, and the positioning light source 311 is evenly distributed as much as possible during the process of irradiating the camshaft, which further improves the accuracy of detection.

[0056] Specifically, the detection mechanism 3 includes an image processing algorithm, which includes three main stages: the pre-processing stage ensures the quality of the input image through data collection, annotation and enhancement; the mid-processing stage designs and trains a convolutional neural network (CNN) to extract features, and evaluates the model performance through a validation set; the post-processing stage uses the trained model to predict the image, optimizes the extraction of the magnetic trace area through threshold processing and morphological operations, and finally visualizes the judgment results.

[0057] It can be seen that relying on advanced detection components 31 and image processing algorithms, magnetic traces can be quickly and accurately identified, enhancing the stability and consistency of detection. The introduction of machine vision enables the system to automatically analyze and identify potential defects in complex detection environments, which not only improves the efficiency of detection, but also reduces the probability of false detection and missed detection. Real-time analysis of detection results using image processing algorithms can provide operators with intuitive visual feedback to better monitor the production process. This intelligent discrimination capability enables the system to quickly respond to and adapt to production needs in mass production, ensuring efficient and comprehensive defect detection, and fundamentally solving the problems of low efficiency and high human resource consumption of traditional magnetic particle detection.

[0058] Based on the above-mentioned implementation of the automated magnetic particle inspection system for camshafts, an automated magnetic particle inspection method is provided, comprising the following steps:

[0059] The transport mechanism 2 picks up the camshaft assembly 4 and transports the picked-up camshaft assembly 4 to the magnetic particle flaw detection mechanism 1;

[0060] The magnetizing assembly receives the camshaft assembly 4 transported by the transporting mechanism 2 and magnetizes the camshaft 40 to be inspected on the camshaft assembly 4;

[0061] The magnetic liquid spraying assembly 12 sprays magnetic powder liquid on the surface of the camshaft 40 to be inspected of the camshaft assembly 4;

[0062] The detection mechanism 3 performs photographic detection on the camshaft after magnetization and spraying with magnetic powder liquid, and records the distribution information of the fluorescent magnetic powder particles on the surface of the camshaft.

[0063] The automated magnetic particle inspection system for camshafts described above performs the following steps during inspection:

[0064] S1, the transport driving member 20 drives the clamping assembly 21 to move to the loading station 60, and cooperates with the clamping assembly 21 to pick up a camshaft assembly 4. After the picking is completed, the transport driving member 20 drives the clamping assembly 21 to transport the picked camshaft assembly 4 to the positioning assembly 5 of the magnetizing platform 10, and the positioning assembly 5 positions the clamping fixture 41;

[0065] S2, the magnetized electrode 11 abuts against the corresponding clamping member 42 and magnetizes the camshaft 40 to be detected, and at the same time, the rotating driving member drives the two magnetized electrodes 11 to rotate axially, and drives the camshaft 40 to be detected to rotate axially through the two clamping members 42;

[0066] S3, the industrial camera 310 cooperates with the corresponding positioning light source 311 to take pictures of the camshaft after magnetization and sprayed with magnetic powder liquid, records the distribution information of the fluorescent magnetic powder particles on the surface of the camshaft, and sends the detection information to the transport drive 20 and the image processing algorithm, and the image processing algorithm analyzes the detection information;

[0067] S4, if it is determined that there is a magnetic mark, that is, the camshaft has a crack defect, the transport drive 20 moves it to the unqualified area of ​​the sorting platform, otherwise it moves it to the qualified parts area for the operator to perform unloading operations;

[0068] S5, the operator takes out and packs the clamping fixtures 41 of the unqualified area and the qualified area;

[0069] S6, the transport driving component 20 transports the clamping fixture 41 on the sorting platform to the storage platform 6, and the transport driving component 20 picks up the next camshaft assembly 4 and repeats the above operation until all camshafts are tested.

[0070] It should be noted that:

[0071] 1) The magnetizing unit applies magnetization to the camshaft in both axial and circumferential directions. During the circumferential magnetization process, the magnetizing electrode 11, the clamping member 42, and the camshaft itself form a current circuit, and the current passing through forms a circumferential magnetizing magnetic field. During the axial magnetization process, the clamping member 42 and the camshaft itself constitute a part of the magnetic circuit, thereby forming a magnetizing magnetic field along the axial direction of the camshaft.

[0072] 2) The positioning light source 311 uses an ultraviolet light source with a wavelength of about 365 nm to ensure that the fluorescence is repeatedly excited. The minimum spatial resolution of the industrial camera 310 is 10 nm.

[0073] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above examples. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automated magnetic particle inspection system for a camshaft, characterized in that: The automatic magnetic particle inspection system for the camshaft includes a magnetic particle flaw detection mechanism, a transport mechanism and a detection mechanism, wherein: The transport mechanism is configured to pick up a camshaft assembly and transport the picked-up camshaft assembly to the magnetic particle flaw detection mechanism, wherein the camshaft assembly includes a camshaft to be inspected; The magnetic particle flaw detection mechanism comprises a magnetizing component and a magnetic liquid spraying component, wherein the magnetizing component is configured to receive the camshaft component transported by the transport mechanism and magnetize the camshaft to be inspected on the camshaft component, and the magnetic liquid spraying component is arranged on one side of the magnetizing component, and the magnetic liquid spraying component is configured to spray magnetic powder liquid on the surface of the camshaft to be inspected of the camshaft component; The detection mechanism is configured to perform photographic detection on the camshaft after magnetization and spraying with magnetic powder liquid, so as to record the distribution information of the fluorescent magnetic powder particles on the surface of the camshaft.

2. The automated magnetic particle inspection system for camshafts according to claim 1, characterized in that: The camshaft assembly includes a clamping fixture and a clamping unit, the clamping unit includes two clamping members rotatably arranged at preset positions of the clamping fixture, the two ends of the camshaft to be tested are rotatably arranged on the clamping fixture through one of the clamping members respectively, and the two ends of the camshaft to be tested are coaxially connected to the corresponding clamping members.

3. The automated magnetic particle inspection system for camshafts according to claim 2, characterized in that: The magnetization assembly comprises a magnetization platform, a magnetization unit and a rotation drive member, wherein: The magnetized platform is configured to carry the camshaft assembly carried by the carrying mechanism; The magnetizing unit comprises two magnetizing electrodes arranged on the magnetizing platform at intervals in the horizontal direction, each of the magnetizing electrodes is arranged corresponding to one end of the camshaft to be detected, and the magnetizing electrode is configured to abut against the corresponding clamping member when the camshaft assembly is located on the magnetizing platform and magnetize the camshaft to be detected, and the clamping member is made of metal material; The driving end of the rotating driving member is connected to one or two of the magnetized electrodes, and the rotating driving member is configured to drive one or two of the magnetized electrodes to rotate axially when the magnetic liquid spraying assembly sprays magnetic powder liquid on the surface of the camshaft to be inspected, so as to drive the camshaft to be inspected to rotate axially through the two clamping members.

4. The automated magnetic particle inspection system for camshafts according to claim 3, characterized in that: A positioning component is disposed on the magnetizing platform, and the positioning component is configured to fix the clamping fixture on the magnetizing platform at a preset position so as to position the camshaft to be inspected.

5. The automated magnetic particle inspection system for camshafts according to claim 2, characterized in that: The automated magnetic particle inspection system for camshafts also includes a storage platform, on which a loading station and a sorting station are provided. The loading station is configured to place a number of camshaft assemblies to be picked up, and the sorting station has a qualified area for placing qualified camshafts and an unqualified area for placing unqualified camshafts.

6. The automated magnetic particle inspection system for camshafts according to claim 5, characterized in that: The transport mechanism is further configured to pick up the inspected camshaft assembly and transport it to the qualified area or the unqualified area according to the inspection result of the inspection mechanism.

7. The automated magnetic particle inspection system for camshafts according to claim 6, characterized in that: The transport mechanism includes a transport drive and a clamping assembly, the driving end of the transport drive is connected to the clamping assembly, the clamping assembly is configured to clamp or put down the camshaft assembly, the transport drive is configured to cooperate with the clamping assembly to clamp the camshaft assembly located at the loading station and then transport it to a preset position of the magnetic particle flaw detection mechanism and put it down, or is configured to clamp the camshaft assembly after inspection at the magnetic particle flaw detection mechanism and then transport it to the sorting station according to the inspection result of the inspection mechanism and in cooperation with the clamping assembly.

8. The automated magnetic particle inspection system for camshafts according to claim 7, characterized in that: The clamping assembly comprises a clamping frame, a clamping drive, a first clamping portion and a second clamping portion, the driving end of the transport drive is connected to the clamping frame, the first clamping portion and the second clamping portion can be arranged on the clamping frame to be close to or far away from each other, the fixed end of the clamping drive is installed on the clamping frame, the driving end of the clamping drive is connected to the first clamping portion and / or the second clamping portion, and the clamping drive is configured to drive the first clamping portion and the second clamping portion to be close to or far away from each other; The clamping driving member drives the first clamping portion and the second clamping portion to approach each other to clamp the camshaft assembly; The clamping driving member drives the first clamping portion and the second clamping portion to move away from each other so as to lower the camshaft assembly.

9. The automated magnetic particle inspection system for camshafts according to claim 1, characterized in that: The detection mechanism includes a detection frame and a detection component, wherein: The detection frame is arranged on one side of the magnetic particle flaw detection mechanism, and the detection component includes a plurality of photographic detection units, which are arranged in an axial array along the camshaft to be detected, and each of the photographic detection units includes an industrial camera and a plurality of positioning light sources evenly distributed around the industrial camera. The industrial camera cooperates with the corresponding positioning light source to perform photographic detection on the camshaft after magnetization and sprayed with magnetic powder liquid, so as to record the distribution information of the fluorescent magnetic powder particles on the surface of the camshaft.

10. An automated magnetic particle testing method, characterized in that: The automated magnetic particle inspection method is implemented by an automated magnetic particle inspection system for a camshaft according to any one of claims 1 to 9, and includes the following steps: The transport mechanism picks up the camshaft assembly and transports the picked-up camshaft assembly to the magnetic particle flaw detection mechanism; The magnetizing assembly receives the camshaft assembly carried by the carrying mechanism and magnetizes the camshaft to be tested on the camshaft assembly; The magnetic liquid spraying assembly sprays magnetic powder liquid on the surface of the camshaft to be inspected of the camshaft assembly; The detection mechanism performs photographic detection on the camshaft after magnetization and spraying with magnetic powder liquid, and records the distribution information of fluorescent magnetic powder particles on the surface of the camshaft.

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