Penetration detection method and detection device

Abstract

The invention discloses a penetration detection method and a detection device.The penetration detection method comprises the following steps: penetration: putting a detected workpiece into a detection inner cavity of a detection container, inputting a penetrant, soaking the detected workpiece in the penetrant, pressurizing the detection container through a pump body, and keeping the pressure for preset time a, the penetrating agent permeates into the defects of the detected workpiece; removing residues, namely taking out the detected workpiece in the detection inner cavity, and removing the redundant penetrant on the surface of the detected workpiece; developing: applying a layer of developing agent with a preset thickness t on the surface of the detected workpiece, and adsorbing the penetrating agent penetrating into the defect of the detected workpiece to the surface of the detected workpiece by using the developing agent to generate a defect image; and determining, observing and recording defect images displayed on the detected workpiece. A pressurization mode is adopted in the permeation step, so that the permeation capacity of the penetrant is improved, a good permeation effect is achieved, and the sensitivity of permeation detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of defect detection, and in particular to a penetration detection method and a detection device. Background Art

[0002] During production and processing, workpieces may form tiny cracks or open defects on the surface. These tiny defects are difficult to observe with the naked eye and usually need to be measured by penetration testing. Penetrant testing technology is a non-destructive testing technology based on the principle of capillary action. The existing testing methods are usually as follows: during testing, a layer of penetrant is sprayed on the surface of the workpiece, and it is left to stand for a period of time. The penetrant is used to penetrate into the tiny defects on the surface of the workpiece by capillary action. Then, the excess penetrant on the surface of the workpiece is wiped off, and a layer of developer is sprayed. The developer is used to make the penetrant be adsorbed to the surface of the workpiece to be inspected, thereby generating a visible defect image in the developer on the surface of the workpiece to determine the shape, size, and location of the defect. The existing penetration testing method is relatively simple. The penetration of the penetrant into tiny defects relies solely on capillary action, and the penetration effect is poor, which affects the subsequent test results. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a penetration detection method, which adopts a pressurization method in the penetration step to improve the penetration ability of the penetrant, achieve a better penetration effect, and is conducive to improving the sensitivity of the penetration detection.

[0004] The invention also provides a detection device applied to the penetration detection method.

[0005] The penetration detection method according to the first aspect of the present invention comprises the following steps:

[0006] Penetration, setting a detection container and a pump body, the detection container has a detection inner cavity, opening the detection container, placing the workpiece to be inspected into the detection inner cavity of the detection container and inputting a penetrant into the detection inner cavity of the detection container, so that the workpiece to be inspected is immersed in the penetrant, closing the detection container, and then pressurizing the detection container through the pump body, so that the pressure of the detection inner cavity is increased and maintained for a preset time a, so that the penetrant penetrates into the defects of the workpiece to be inspected;

[0007] Remove excess: open the test container and take out the workpiece to be tested in the inner cavity of the test, and remove excess penetrant on the surface of the workpiece to be tested;

[0008] Development: applying a layer of developer with a preset thickness t on the surface of the inspected workpiece, and using the developer to adsorb the penetrant that has penetrated into the defect of the inspected workpiece to the surface of the inspected workpiece to produce a defect image;

[0009] Measure, observe and record the defect images displayed on the inspected workpiece.

[0010] The penetration testing method according to the embodiment of the present invention has at least the following beneficial effects: when performing the penetration step, the workpiece to be tested is placed in the testing cavity of the testing container to immerse the penetrant and a pump is used to supply pressure to the testing cavity, so that the penetrant penetrates into the tiny defects on the surface of the workpiece under the combined effect of the higher pressure in the cavity and the capillary action. The high pressure in the cavity is utilized to improve the penetration ability of the penetrant and achieve a better penetration effect, which is beneficial to improving the sensitivity of the penetration test, thereby being able to obtain a more accurate test result.

[0011] According to some embodiments of the present invention, before the penetration step is performed, the surface of the inspected workpiece is cleaned.

[0012] According to some embodiments of the present invention, when performing the infiltration step, a heating component is provided and the detection cavity is heated by the heating component to increase the temperature of the infiltrant in the detection cavity.

[0013] According to some embodiments of the present invention, the heating component heats the penetrant in the detection cavity to a preset temperature b, and the preset temperature b is not higher than 50°C.

[0014] According to some embodiments of the present invention, during the infiltration step, a vibration component is provided to generate vibration and transmit the vibration to the penetrant in the detection cavity.

[0015] According to some embodiments of the present invention, when performing the infiltration step, a driver and a bracket for fixing the workpiece to be inspected are provided, the bracket is rotatably connected in the detection cavity and is transmission-connected to the driver, and when the pump body pressurizes the detection container, the driver drives the bracket to rotate in the detection cavity.

[0016] According to some embodiments of the present invention, after the removal step and before the development step, the surface of the inspected workpiece is dried.

[0017] According to some embodiments of the present invention, during the developing step, the preset thickness t is in the range of 25 to 45 microns.

[0018] According to some embodiments of the present invention, during the development step, the workpiece to be inspected, to which the developer is applied, is placed in the inspection cavity of an inspection container without a penetrant and the inspection container is closed. The inspection container is then pumped by a pump to form a negative pressure in the inspection cavity.

[0019] According to the detection device described in the embodiment of the second aspect of the present invention, it includes a detection container, a pump body and a driver, the detection container has an openable and closable detection cavity, the detection cavity is provided with a bracket for fixing the workpiece to be detected, the detection container is provided with a heating component and a vibration component, the pump body is connected to the detection container, can pressurize the detection cavity and form a negative pressure in the detection cavity, the driver is transmission-connected to the bracket, can drive the bracket to rotate, the heating component can heat the detection cavity, and the vibration component can generate vibration and transmit the vibration to the detection cavity.

[0020] According to the detection device described in the embodiment of the present invention, it has at least the following beneficial effects: when in use, the workpiece to be inspected can be placed in the detection cavity of the detection container to soak the penetrant and a pump body is used to supply pressure to the detection cavity to increase the pressure in the detection cavity, while the heating component heats the detection cavity, the vibration component generates vibration and transmits the vibration to the detection cavity, and the driver drives the bracket to rotate, thereby improving the penetration effect of the penetrant at the defect; in addition, during the development process, the workpiece to be inspected with the developer applied can be placed in the detection cavity of the detection container and a pump body is used to evacuate the detection cavity to help the penetrant in the defect be adsorbed to the surface of the workpiece to be inspected, thereby generating a clearly visible defect display image in the developer on the surface of the workpiece to be inspected, thereby greatly improving the sensitivity of the penetration detection, so that a more accurate detection result can be obtained.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a simplified schematic diagram of the structure of the detection device according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] Detection container 100, detection inner cavity 101, bracket 110, fixture 111, heating component 120, vibration component 130;

[0026] Pump body 200, connecting pipe 210, opening and closing valve 220, pressure gauge 230;

[0027] Driver 300 and magnetic turntable 310 . DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it is necessary to understand that if it involves orientation description, the orientation or position relationship indicated by, for example, up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, if the words such as several, greater than, less than, exceed, above, below, within, etc. appear, among which, several means one or more, more means more than two, greater than, less than, exceed, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself.

[0031] If the first and second are described, they are only used to distinguish the technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] According to the first aspect of the present invention, the penetration detection method comprises the following steps:

[0034] Penetration, setting a detection container 100 and a pump body 200, the detection container 100 has a detection inner cavity 101, opening the detection container 100, placing the workpiece to be inspected into the detection inner cavity 101 of the detection container 100 and inputting a penetrant into the detection inner cavity 101 of the detection container 100, so that the workpiece to be inspected is immersed in the penetrant, closing the detection container 100, and then pressurizing the detection container 100 through the pump body 200, so that the pressure of the detection inner cavity 101 increases and is maintained for a preset time a, so that the penetrant penetrates into the defects of the workpiece to be inspected;

[0035] Remove the excess, open the detection container 100 and take out the workpiece to be detected in the detection inner cavity 101, and remove the excess penetrant on the surface of the workpiece to be detected;

[0036] Development: applying a layer of developer with a preset thickness t on the surface of the inspected workpiece, and using the developer to adsorb the penetrant that has penetrated into the defect of the inspected workpiece to the surface of the inspected workpiece to produce a defect image;

[0037] Measure, observe and record the defect images displayed on the inspected workpiece.

[0038] It is understandable that when performing the penetration step, the preset time a should be no less than 10 minutes to avoid the situation where the time is too short and the penetrant fails to effectively penetrate the defect; when performing the residue removal step, the excess penetrant on the surface of the inspected workpiece can be removed by unidirectional wiping or scraping, and the penetrant that has penetrated into the defect should be avoided; when performing the development step, the development time should be no less than 7 minutes to ensure that the penetrant can be effectively adsorbed, and the development time should not be too long to avoid the penetrant spreading on the developer and causing blurred defect images; the measurement step should be completed within 60 minutes after applying the developer. At the same time, the developer, residual traces of penetrant and other contaminants on the surface of the inspected workpiece need to be removed in time after the measurement step.

[0039] The present invention places the workpiece to be inspected in the inspection cavity 101 of the inspection container 100 to immerse the penetrant and uses a pump body 200 to supply pressure to the inspection cavity 101, so that the penetrant penetrates into the tiny defects on the surface of the workpiece under the combined action of the higher pressure in the cavity and the capillary action. The high pressure in the cavity is utilized to improve the penetration ability of the penetrant, achieve a better penetration effect, and help to improve the sensitivity of the penetration test, so that a more accurate test result can be obtained.

[0040] In some embodiments, before the infiltration step, the surface of the inspected workpiece is cleaned.

[0041] It is understandable that by cleaning the surface of the workpiece to be inspected before the penetration step, the contaminants on the workpiece surface that affect the penetration test can be removed to ensure the accuracy of subsequent tests. In actual applications, the cleaning process can be mechanical cleaning, chemical cleaning, solvent cleaning, etc., which can be set accordingly according to actual use needs, as long as the working function of the workpiece to be inspected is not damaged.

[0042] In some embodiments, when performing the infiltration step, a heating component 120 is provided and the detection cavity 101 is heated by the heating component 120 to increase the temperature of the infiltration agent in the detection cavity 101 .

[0043] It is understandable that if Figure 1As shown, by heating the detection cavity 101 through the heating component 120, the temperature of the penetrant can be increased, and its molecular thermal motion can be increased to enhance the penetration effect of the penetrant in the defect, so as to obtain more accurate detection results later. In actual application, the heating method of the heating component 120 can be various. For example, the heating component 120 can be an electric heating rod, which is arranged on the outer wall of the detection container 100 to achieve the purpose of heating the penetrant in the detection cavity 101, or the heating component 120 can be a burner to heat the detection container 100 by combustion heating, or a heat exchange flow channel is set to use a heat medium to exchange heat with the penetrant in the detection cavity 101 to heat the penetrant in the detection cavity 101. The specific setting can be made according to the actual use needs.

[0044] Furthermore, the heating component 120 heats the penetrant in the detection cavity 101 to a preset temperature b, and the preset temperature b is not higher than 50°C.

[0045] It is understandable that when heating the penetrant in the detection cavity 101, the heating temperature should be avoided to be too high, and the preset temperature b should be no higher than 50° C. to prevent the volatilization of water in the penetrant, which causes the penetrant to agglomerate and dry, and affects the penetrant's permeability to small defects. In actual application, the preset temperature b can be set accordingly according to different types of penetrants, and is not limited here.

[0046] In some embodiments, when the infiltration step is performed, a vibration component 130 is provided to generate vibrations and transmit the vibrations to the infiltrant in the detection cavity 101 .

[0047] It is understandable that if Figure 1 As shown, during the penetration step, vibration is generated by the vibration component 130 and transmitted to the detection inner cavity 101. The vibration can facilitate the discharge of air and impurities at the defects of the inspected workpiece, and at the same time can improve the penetration effect of the penetrant at the defects, so as to obtain more accurate detection results later. In actual application, the vibration component 130 can be an ultrasonic generator, which generates ultrasonic vibration and transmits it to the detection inner cavity 101, or the vibration component 130 can also be a mechanical vibrator such as a vibration motor, which can be set accordingly according to actual use needs.

[0048] In some embodiments, when performing the penetration step, a driver 300 and a bracket 110 for fixing the workpiece to be inspected are provided. The bracket 110 is rotatably connected in the detection cavity 101 and is transmission-connected to the driver 300. When the pump body 200 pressurizes the detection container 100, the driver 300 drives the bracket 110 to rotate in the detection cavity 101.

[0049] It is understandable that if Figure 1As shown, the bracket 110 is rotatably connected to the detection container 100 and is located in the detection inner cavity 101. The driver 300 is a motor and is transmission-connected to the bracket 110, which can drive the bracket 110 to rotate relative to the detection container 100. When performing the penetration step, the bracket 110 can be driven to rotate, thereby driving the workpiece to be inspected thereon to rotate. On the one hand, the penetrant in the detection inner cavity 101 can be stirred to increase its fluidity. On the other hand, the flipping of the bracket 110 can be used to make different surfaces of the workpiece face upward, so that the opening of the defect faces upward, which is conducive to the discharge of air in the defect and the penetration of the penetrant, thereby improving the penetration effect of the penetrant in the defect. In actual application, the specific structure of the driver 300 and the bracket 110 can be set accordingly according to actual use needs.

[0050] In some embodiments, after the removal step and before the development step, the surface of the inspected workpiece is dried.

[0051] It is understandable that after the removal step, the surface of the inspected workpiece is dried to remove moisture from the surface of the inspected workpiece, which is conducive to allowing the penetrant to fully penetrate the defect or to seep back onto the developer in the subsequent development step, so as to facilitate the subsequent development step. In actual application, the drying method can be natural air drying, air drying or heating drying, which can be set accordingly according to actual use needs.

[0052] In some embodiments, during the development step, the preset thickness t is in the range of 25 to 45 microns.

[0053] It is understandable that, when performing the development step, the thickness of the developer applied should not be too thick or too thin. The preset thickness t is set in the range of 25 to 45 microns, which is conducive to avoiding the developer on the surface of the inspected workpiece being too thick, resulting in blurred imaging, and avoiding the developer on the surface of the inspected workpiece being too thin, resulting in the penetrant not being effectively adsorbed from the defect, affecting subsequent determination. In actual application, the preset thickness t can be 25 microns, 35 microns or 45 microns, etc., which can be set accordingly according to actual use needs.

[0054] In some embodiments, during the development step, the workpiece to be inspected with the developer applied thereto is placed into the inspection cavity 101 of the inspection container 100 without a penetrant and the inspection container 100 is closed. The inspection container 100 is then pumped through the pump body 200 to form a negative pressure in the inspection cavity 101.

[0055] It is understandable that when the development step is performed, the workpiece to be inspected with the developer applied is placed in the detection cavity 101 of the detection container 100 without the penetrant, and the detection cavity 101 is evacuated by the pump body 200 to form a negative pressure in the detection cavity 101. The penetrant in the defect is adsorbed to the surface of the workpiece to be inspected by utilizing the capillary action principle and the negative pressure in the detection cavity 101, thereby producing a clearly visible defect display image, and utilizing the negative pressure in the cavity to enhance the effect of the penetrant being adsorbed from the defect, thereby improving the detection sensitivity, so as to obtain a more accurate detection result later. In actual application, the detection container 100 used in the development step and the detection container 100 used in the penetration step can be the same container, and before the development step is performed, the penetrant in the detection cavity 101 can be output, or the detection container 100 used in the development step and the detection container 100 used in the penetration step are two containers respectively, which can be set accordingly according to actual use needs.

[0056] According to the second aspect of the present invention, the detection device comprises a detection container 100, a pump body 200 and a driver 300. The detection container 100 has an openable and closable detection cavity 101. The detection cavity 101 is provided with a bracket 110 for fixing a workpiece to be detected. The detection container 100 is provided with a heating component 120 and a vibration component 130. The pump body 200 is connected to the detection container 100 and can pressurize the detection cavity 101 and form a negative pressure in the detection cavity 101. The driver 300 is transmission-connected to the bracket 110 and can drive the bracket 110 to rotate. The heating component 120 can heat the detection cavity 101. The vibration component 130 can generate vibration and transmit the vibration to the detection cavity 101.

[0057] It is understandable that if Figure 1 As shown, one side of the detection container 100 is connected to the pump body 200, and the pump body 200 and the detection container 100 are connected by a connecting pipe 210 to supply pressure or vacuum to the detection container 100 through the connecting pipe 210. A linkage structure is provided between the driver 300 and the bracket 110, and the driver 300 drives the bracket 110 to rotate through the linkage structure. The wall of the detection container 100 is respectively connected to the heating component 120 and the vibration component 130. In this embodiment, the heating component 120 includes an electric heating rod, and the vibration component 130 is an ultrasonic generator. The detection cavity 101 has an opening (not shown in the figure), and the detection container 100 can be provided with a cover or a door corresponding to the opening to control the opening and closing of the detection cavity 101.

[0058] The detection device of the second embodiment of the present invention is mainly applied to the penetration detection method of the first embodiment of the present invention. When in use, the workpiece to be inspected can be placed in the detection cavity 101 of the detection container 100 to soak the penetrant and the pump body 200 is used to supply pressure to the detection cavity 101 to increase the pressure of the detection cavity 101. At the same time, the heating component 120 heats the detection cavity 101, the vibration component 130 generates vibration and transmits the vibration to the detection cavity 101, and the driver 300 drives the bracket 110 to rotate, thereby improving the penetration effect of the penetrant at the defect. In addition, during the development process, the workpiece to be inspected with the developer applied can be placed in the detection cavity 101 of the detection container 100 and the pump body 200 is used to vacuum the detection cavity 101 to help the penetrant in the defect be adsorbed to the surface of the workpiece to be inspected, thereby generating a clearly visible defect display image in the developer on the surface of the workpiece to be inspected, thereby greatly improving the sensitivity of the penetration detection, so that a more accurate detection result can be obtained.

[0059] In actual application, the detection container 100 may be provided with two, corresponding to the penetration step and the imaging step respectively, and the pump body 200 may also be provided with two, for pressure supply and vacuum use respectively, or the detection container 100 may be provided with one, and the pump body 200 may be provided with one and specifically a dual-purpose vacuum pump for pumping and beating; the support 110 and the detection container 100 may be detachably connected. When used for detection, the support 110 can be disassembled and taken out through the opening of the detection inner cavity 101, and after the workpiece to be detected is fixed on the support 110, the support 110 and the workpiece to be detected are removed together. The workpiece to be tested is placed into the detection cavity 101, and the bracket 110 is connected to the detection container 100. Alternatively, when used for detection, the bracket 110 can be kept intact, and the workpiece to be tested can be placed into the detection cavity 101 from the opening of the detection cavity 101 and fixed on the bracket 110; the penetrant can be injected into the detection cavity 101 through the opening of the detection cavity 101, or the detection container 100 is connected to an infusion tube for conveying the penetrant, so that the penetrant is injected into the detection cavity 101 through the infusion tube, and the specific setting can be made according to the actual use needs.

[0060] Furthermore, the connecting pipe 210 is provided with an opening and closing valve 220, which can connect or disconnect the detection inner cavity 101 with the external atmosphere; and the connecting pipe 210 is provided with a pressure gauge 230 for displaying the internal pressure of the connecting pipe 210. It is understandable that, if Figure 1As shown, when the pump body 200 supplies pressure or suction to the detection cavity 101, the opening and closing valve 220 remains in a closed state. After the inspected workpiece in the detection cavity 101 completes the penetration step or the imaging step, the opening and closing valve 220 on the connecting pipe 210 can be opened to connect the detection cavity 101 with the external atmosphere, thereby facilitating the detection cavity 101 to return to a normal pressure state; by providing a pressure gauge 230 on the connecting pipe 210, the user can obtain the pressure condition of the detection cavity 101 through the pressure gauge 230, which is convenient for controlling the progress of the detection process and convenient for use.

[0061] Furthermore, a fixture 111 for fixing the workpiece to be inspected is provided on the bracket 110. It is understandable that Figure 1 As shown, the bracket 110 is provided with a plurality of clamps 111. When in use, the workpiece to be inspected can be fixed on the bracket 110 by the clamps 111 to prevent it from loosening and facilitate use. In actual application, in addition to the above structure, a clamping structure can be provided to clamp the workpiece to be inspected on the bracket 110, or a magnetic structure can be provided to magnetically attract the workpiece to the bracket 110 to achieve the fixation of the workpiece. The specific setting can be made according to the actual use needs.

[0062] Furthermore, the linkage structure includes two magnetic turntables 310, one of which is fixedly connected to the bracket 110 and located in the detection cavity 101, and the other is drivingly connected to the driver 300 and located on the outside of the detection container 100. The two magnetic turntables 310 can be magnetically coordinated and linked, so that when the magnetic turntable 310 connected to the driver 300 rotates, it can drive the magnetic turntable 310 connected to the bracket 110 to rotate.

[0063] It is understandable that if Figure 1 As shown, one of the two magnetic turntables 310 is fixedly connected to the bracket 110 and is located in the detection inner cavity 101, and the other is drivingly connected to the driver 300 and is located outside the detection container 100. Each magnetic turntable 310 is provided with a plurality of magnetic parts (not shown in the figure) distributed around the rotation axis. The two magnetic turntables 310 can be magnetically matched through their respective magnetic parts to achieve linkage between the two, so that the driver 300 can drive the bracket 110 to rotate. By adopting the above linkage structure, the detection container 100 does not need to be provided with a rotating shaft passing through the inside and outside, and the gap on the detection container 100 can be reduced, which is conducive to ensuring the airtightness of the detection container 100 and is convenient for pressurization and vacuuming. In actual application, the specific structure of the magnetic turntable 310 can be set accordingly according to actual use needs.

[0064] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A penetration detection method, characterized in that: The following steps are involved: Penetration, setting a detection container and a pump body, the detection container has a detection inner cavity, opening the detection container, placing the workpiece to be inspected into the detection inner cavity of the detection container and inputting a penetrant into the detection inner cavity of the detection container, so that the workpiece to be inspected is immersed in the penetrant, closing the detection container, and then pressurizing the detection container through the pump body, so that the pressure of the detection inner cavity is increased and maintained for a preset time a, so that the penetrant penetrates into the defects of the workpiece to be inspected; Remove excess: open the test container and take out the workpiece to be tested in the inner cavity of the test, and remove excess penetrant on the surface of the workpiece to be tested; Development: applying a layer of developer with a preset thickness t on the surface of the inspected workpiece, and using the developer to adsorb the penetrant that has penetrated into the defect of the inspected workpiece to the surface of the inspected workpiece to produce a defect image; Measure, observe and record the defect images displayed on the inspected workpiece.

2. The penetration detection method according to claim 1, characterized in that: Before the penetration step, the surface of the workpiece to be inspected is cleaned.

3. The penetration detection method according to claim 1, characterized in that: When performing the infiltration step, a heating component is provided and the detection inner cavity is heated by the heating component so as to increase the temperature of the infiltration agent in the detection inner cavity.

4. The penetration detection method according to claim 3, characterized in that: The heating component heats the penetrant in the detection cavity to a preset temperature b, which is no higher than 50°C.

5. The penetration detection method according to claim 1, characterized in that: When the penetration step is performed, a vibration component is provided to generate vibration and transmit the vibration to the penetrant in the detection cavity.

6. The penetration detection method according to claim 1, characterized in that: During the penetration step, a driver and a bracket for fixing the workpiece to be inspected are provided. The bracket is rotatably connected to the detection cavity and is transmission-connected to the driver. When the pump body pressurizes the detection container, the driver drives the bracket to rotate in the detection cavity.

7. The penetration detection method according to claim 1, characterized in that: After the removal step and before the development step, the surface of the inspected workpiece is dried.

8. The penetration detection method according to claim 1, characterized in that: When performing the developing step, the preset thickness t is in the range of 25 to 45 microns.

9. The penetration detection method according to claim 1, characterized in that: During the development step, the workpiece to be inspected with the developer applied thereto is placed into the inspection cavity of the inspection container without the penetrant, the inspection container is closed, and then the inspection container is pumped by the pump body to form a negative pressure in the inspection cavity.

10. A detection device, characterized in that: The invention comprises a detection container, a pump body and a driver, wherein the detection container has an openable and closable detection inner cavity, wherein a bracket for fixing a workpiece to be detected is provided in the detection inner cavity, and wherein a heating component and a vibration component are provided in the detection container. The pump body is connected to the detection container and can pressurize the detection inner cavity and form a negative pressure in the detection inner cavity. The driver is transmission-connected to the bracket and can drive the bracket to rotate. The heating component can heat the detection inner cavity, and the vibration component can generate vibration and transmit the vibration to the detection inner cavity.

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