Nondestructive inspection device and method for automobile beam frame

Abstract

The invention relates to the technical field of automobile beam frame material research, development and detection, and provides an automobile beam frame nondestructive flaw detection device and a detection method, the automobile beam frame nondestructive flaw detection device is used for carrying out fluorescent penetrant flaw detection on an automobile beam frame made of a novel material, and the automobile beam frame nondestructive flaw detection device comprises a flaw detection box, a penetrant storage box, a nozzle, a movable cover and a hoisting clamp; and when the hoisting clamp clamps a workpiece to move to the upper part in the flaw detection box, the movable cover blocks the opening in the top side of the penetrant storage box. The penetrant storage box and the nozzle are arranged in the flaw detection box, cleaning, permeating, cleaning and developing procedures in flaw detection of a workpiece can be achieved by means of one-time lifting movement of the workpiece, the occupied space of the flaw detection device is reduced, the detection efficiency of the workpiece is improved, and the movable cover is arranged, so that the flaw detection efficiency is improved. The top side opening of the penetrant storage box is selectively blocked, so that the independence of each process in flaw detection of the workpiece can be improved, and the detection quality of the workpiece is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of research and development and detection of automotive beam materials, and particularly to a non-destructive flaw detection device and detection method for automotive beams. Background Art

[0002] Automotive beams are important components of vehicles. During the vehicle R & D process, especially for new energy vehicles, in order to effectively reduce the weight of the vehicle, new lightweight materials such as aluminum alloy and carbon fiber are selected to replace traditional steel. However, automotive beams made of new materials are prone to unexpected damage defects. To ensure their processing quality, a non-destructive flaw detection device is required to detect the developed automotive beams.

[0003] The utility model with the publication number CN210071689U discloses a penetrant flaw detector, which includes a frame with a workbench, a moving component slid on the workbench, four working pools respectively for penetration, cleaning, imaging, and observation, and a lifting component arranged in the working pool for driving parts to move up and down. Four discharge holes respectively communicating with the openings of the four working pools are arranged on the workbench; the moving component includes two relatively arranged moving plates, two moving cylinders respectively installed on the two moving plates, and a closing plate hinged to the two moving plates respectively. One end of the closing plate is hinged to the piston rod of the moving cylinder, and a channel for parts to leak downward is formed between the two moving plates. The channel is closed when the two closing plates are horizontal. It has the effects of high automation, low labor intensity of operators, and high detection efficiency.

[0004] In the above technical solution, in order to realize the penetrant flaw detection of workpieces, four working pools respectively for penetration, cleaning, imaging, and observation are set, and the workpieces are operated by passing through the four working pools in sequence. However, this penetrant flaw detector occupies a large space and has cumbersome operation steps, which is not conducive to improving the detection efficiency of automotive beams. Summary of the Invention

[0005] In view of this, the present invention provides a non-destructive flaw detection device and detection method for automotive beams, which can reduce the occupied space of the non-destructive flaw detection device and improve its space utilization rate.

[0006] The technical solution of the present invention is realized as follows: On the one hand, the present invention provides a non-destructive flaw detection device for automotive beams, which is used for fluorescent penetrant flaw detection of workpieces, and includes a flaw detection box, a penetrant storage box, a nozzle, a movable cover, and a lifting fixture. Among them,

[0007] The penetrant storage box is fixedly arranged below in the flaw detection box, and the side walls of the two are spaced apart. Openings are provided on the top sides of both the penetrant storage box and the flaw detection box;

[0008] The nozzle is fixedly arranged above the inside of the flaw detection box and is used to remove the penetrant and stains on the surface of the workpiece or spray a developer onto the surface of the workpiece;

[0009] The movable cover is movably arranged in the middle of the flaw detection box;

[0010] When the lifting fixture clamps the workpiece and moves it above the inside of the flaw detection box, the movable cover seals the opening on the top side of the penetrant storage tank to perform the cleaning, washing, coloring and observation processes of the penetrant flaw detection of the workpiece; when the lifting fixture clamps the workpiece and moves it below the inside of the flaw detection box, the movable cover does not seal the opening on the top side of the penetrant storage tank to move the workpiece into the penetrant for the penetration process of the penetrant flaw detection of the workpiece.

[0011] On the basis of the above technical solutions, preferably, the movable cover includes two cover plates, rollers and two guide rails, where,

[0012] The two cover plates are symmetrically arranged about the center line of the penetrant storage tank;

[0013] The rollers are rotatably arranged on the cover plates, and two rollers are oppositely arranged at each end of the cover plates;

[0014] The guide rails are fixedly arranged inside the flaw detection box, the rollers are rollingly arranged inside the guide rails, the two guide rails are symmetrically arranged about the center line of the penetrant storage tank, and the two rollers at the same end of the cover plate are connected to the same guide rail.

[0015] More preferably, the guide rail is in the shape of a gantry structure, and the middle position of the guide rail is high in the middle and low on both sides;

[0016] When the movable cover does not seal the opening on the top side of the penetrant storage tank, the two cover plates are respectively located on both sides of the penetrant storage tank; when the movable cover seals the opening on the top side of the penetrant storage tank, the cover plates are inclined, and the end of the cover plate close to the other cover plate is higher than the end of the cover plate far from the other cover plate.

[0017] More preferably, it further includes a telescopic rod, and the telescopic rod is fixedly arranged on the lifting fixture;

[0018] The movable cover further includes an elastic member, and the elastic member is arranged on the cover plate;

[0019] When the telescopic rod abuts against the elastic member, it drives the cover plate to move to the side of the penetrant storage tank, and when the telescopic rod does not abut against the elastic member, the cover plate moves to the upper part of the penetrant storage tank.

[0020] More preferably, the elastic member includes a sliding shaft, a sliding plate, a tension spring and a connecting rod, wherein,

[0021] The sliding shaft is fixedly arranged in the flaw detection box;

[0022] The sliding plate is slidably arranged on the sliding shaft;

[0023] The tension spring is fixedly arranged on the sliding shaft, and one end of it is fixedly arranged on the top side of the sliding plate;

[0024] Both ends of the connecting rod are rotatably arranged on the cover plate and the sliding plate respectively.

[0025] More preferably, the telescopic rod includes a sleeve, a support rod and a spring, wherein,

[0026] The upper end of the sleeve is fixedly arranged on the lifting fixture;

[0027] The support rod is slidably arranged in the support rod;

[0028] One end of the spring is fixedly arranged in the sleeve, and the other end abuts against the top side of the support rod.

[0029] On the basis of the above technical solutions, preferably, the lifting fixture includes a mounting plate, a workpiece holder and a fixing rod, wherein,

[0030] The mounting plate is used to be connected with the lifting equipment;

[0031] The workpiece holder is located below the mounting plate;

[0032] The fixing rod is fixedly arranged between the mounting plate and the workpiece holder.

[0033] More preferably, a water leakage hole is provided in the middle of the workpiece holder;

[0034] The lifting fixture further includes two water diversion plates and two counterweights, wherein,

[0035] The middle position of the water diversion plate is rotatably arranged in the water leakage hole, and the two water diversion plates are symmetrically arranged about the center line of the water leakage hole;

[0036] The counterweight is fixedly arranged at one end of the bottom side of the water diversion plate away from the center line of the water leakage hole.

[0037] More preferably, the water diversion plate includes a first rotating rod, a second rotating rod, a water receiving plate and a water guiding plate, wherein,

[0038] The middle position of the first rotating rod is rotatably arranged in the water leakage hole;

[0039] One end of the second rotating rod is rotatably arranged in the water leakage hole and is parallel to the first rotating rod;

[0040] The water receiving plate is rotatably arranged between the first rotating rod and the second rotating rod and is parallel to the workpiece rack;

[0041] The water guiding plate is fixedly arranged at one end of the first rotating rod away from the water receiving plate and is in sealing abutment with the water receiving plate, and the counterweight is fixedly arranged on the bottom side of the water guiding plate.

[0042] In a second aspect, the present invention provides a non-destructive flaw detection method for an automobile beam frame, using the above-mentioned non-destructive flaw detection device for an automobile beam frame, including the following steps:

[0043] S1, fix the lifting fixture on the lifting equipment and fix the workpiece on the lifting fixture;

[0044] S2, use the lifting equipment to drive the workpiece to move above the flaw detection box and open the nozzle to clean the workpiece and remove stains on the surface of the workpiece;

[0045] S3, use the lifting equipment to drive the workpiece to move into the penetrant in the penetrant storage tank for penetration;

[0046] S4, use the lifting equipment to drive the workpiece to move above the penetrant storage tank and open the nozzle to remove the penetrant on the surface of the workpiece;

[0047] S5, take out the workpiece, spray a developer, observe the color on the surface of the workpiece, and judge whether there are defects in the workpiece.

[0048] The non-destructive flaw detection device and method for an automobile beam frame of the present invention have the following

[0049] Advantages:

[0050] (1) By arranging the penetrant storage tank and the nozzle in the flaw detection box, the cleaning, penetration, cleaning and coloring processes in the flaw detection of the workpiece can be realized by using a single lifting movement of the workpiece, which not only reduces the occupied space of the flaw detection device, but also reduces the moving stroke of the workpiece and improves the detection efficiency of the workpiece. By setting the movable cover and using its selective blockage of the opening on the top side of the penetrant storage tank, the independence of each process in the flaw detection of the workpiece can be improved, avoiding mutual contamination of the penetrant, developer and cleaning water, and ensuring the detection quality of the workpiece.

[0051] (2) By setting the elastic member, the cover plate can block the opening on the top side of the penetrant storage tank in the natural state to provide real-time protection for the penetrant flaw detector in the penetrant storage tank. By setting the telescopic rod on the lifting fixture and utilizing the abutting cooperation between the bottom end of the telescopic rod and the elastic member, when the workpiece moves below the flaw detection tank, the cover plate can be automatically moved to the side of the penetrant storage tank to realize the linkage between the lifting fixture and the movable cover plate, improving the operation convenience of the flaw detection device. By setting the telescopic rod to be adjustable in length and utilizing the telescopic change of its own length, when the workpiece moves to the bottom of the penetrant storage tank, the bottom end of the telescopic rod can be flush with the bottom side of the lifting fixture, which is beneficial to further reducing the volume of the flaw detection tank;

[0052] (3) By setting the water separation plate and the counterweight, using the pressure of the counterweight on the water separation plate, the water separation plate can be inclined in the natural state, causing one end of the water separation plate to tilt up and abut against the workpiece on the workpiece rack, which is beneficial to promoting the loss of moisture on the workpiece and accelerating the drying efficiency of the workpiece and the flaw detection efficiency of the workpiece. By setting the water separation plate to include the first rotating rod, the second rotating rod, the water receiving plate and the water guiding plate, the water receiving plate can always be parallel to the workpiece rack, enabling the water separation plate to adapt to the automotive beam frame with a flat bottom side. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0054] Figure 1 Is a perspective view of a non-destructive flaw detection device for an automotive beam frame of the present invention;

[0055] Figure 2 Is a cross-sectional view of a non-destructive flaw detection device for an automotive beam frame of the present invention in a state where the movable cover blocks the opening on the top side of the penetrant storage tank;

[0056] Figure 3 Is Figure 2 An enlarged view of part A in

[0057] Figure 4 Is a cross-sectional view of a non-destructive flaw detection device for an automotive beam frame of the present invention in a state where the movable cover does not block the opening on the top side of the penetrant storage tank;

[0058] Figure 5 Is Figure 4 An enlarged view of part B in

[0059] Figure 6Stereogram of the guide rail in a non-destructive flaw detection device for an automobile beam frame according to the present invention;

[0060] Figure 7 Stereogram of the roller in a non-destructive flaw detection device for an automobile beam frame according to the present invention;

[0061] Figure 8 Stereogram of the cover plate in different states in a non-destructive flaw detection device for an automobile beam frame according to the present invention;

[0062] Figure 9 Stereogram of the elastic member in a non-destructive flaw detection device for an automobile beam frame according to the present invention;

[0063] Figure 10 Cross-sectional view of the telescopic rod in a non-destructive flaw detection device for an automobile beam frame according to the present invention;

[0064] Figure 11 Stereogram of the lifting fixture in a non-destructive flaw detection device for an automobile beam frame according to the present invention;

[0065] Figure 12 Stereogram of the water dividing plate in a non-destructive flaw detection device for an automobile beam frame according to the present invention.

[0066] Wherein: 1, flaw detection box; 2, penetrant storage box; 3, nozzle; 4, movable cover; 41, cover plate; 42, roller; 43, guide rail; 44, elastic member; 441, sliding shaft; 442, sliding plate; 443, tension spring; 444, connecting rod; 5, lifting fixture; 51, mounting plate; 52, workpiece holder; 53, fixed rod; 54, water dividing plate; 541, first rotating rod; 542, second rotating rod; 543, water receiving plate; 544, water guiding plate; 55, counterweight; 501, water leakage hole; 6, telescopic rod; 61, sleeve; 62, support rod; 63, spring. Detailed implementation manners

[0067] Next, in combination with the specific implementation manners of the present invention, the technical solutions in the present invention will be clearly and completely described. Obviously, the described implementation manners are only a part of the implementation manners of the present invention, rather than all the implementation manners. Based on the implementation manners in the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0068] As Figure 1-12 shown, a non-destructive flaw detection device for an automobile beam frame according to the present invention includes a flaw detection box 1, a penetrant storage box 2, a nozzle 3, a movable cover 4, a lifting fixture 5, and a telescopic rod 6, and is used for performing fluorescent penetrant flaw detection on an automobile beam frame (hereinafter referred to as a workpiece) processed with new materials.

[0069] The penetrant inspection operation of the workpiece usually includes steps such as cleaning, penetration, cleaning, color development, and observation. An opening is provided on the top side of the inspection box 1, which is used to provide an environment for the cleaning, penetration, cleaning, color development, and observation processes of the workpiece. The lifting fixture 5 is used to clamp the workpiece and drive the workpiece to move, so that the workpiece can be transferred to different process positions.

[0070] The penetrant storage tank 2 is used to store the penetrant inspection agent. The penetrant storage tank 2 is fixedly arranged below in the inspection box 1. An opening is provided on the top side of the penetrant storage tank 2, and its side wall is spaced from the side wall of the inspection box 1. The nozzle 3 is used to spray cleaning water to remove the penetrant inspection agent and stains on the surface of the workpiece. The nozzle 3 is fixedly arranged above in the inspection box 1. When the workpiece moves above in the inspection box 1, the cleaning water sprayed by the nozzle 3 can be used to clean and remove the stains or penetrant inspection agent on the surface of the workpiece, and the used cleaning water can be stored between the penetrant storage tank 2 and the inspection box 1. When the workpiece moves below in the inspection box 1, the workpiece can be immersed in the penetrant inspection agent in the penetrant storage tank 2, so as to perform the penetration process of the workpiece. Multiple nozzles 3 can be provided, and one of the nozzles 3 can be used to spray the color developer onto the surface of the workpiece, so that the color development and observation operations of the workpiece can also be carried out in the inspection box 1. With this structural design, the cleaning, penetration, cleaning, color development, and observation processes of the workpiece penetrant inspection can all be carried out in the inspection box 1, reducing the occupied space of this inspection device. At the same time, by using a single lifting and moving of the workpiece, all the processes in the workpiece inspection can be realized, without moving and lifting the workpiece to different process positions, and the inspection efficiency of the workpiece is also improved.

[0071] When the workpiece is undergoing the cleaning, cleaning, and color development processes, the cleaning water or color developer is likely to splash into the penetrant storage tank 2, affecting the normal use of the penetrant inspection agent. For this reason, the movable cover 4 is movably arranged in the middle of the inspection box 1; as Figure 2 shown, when the lifting fixture 5 clamps the workpiece and moves it outside the inspection box 1, or when the lifting fixture 5 clamps the workpiece and moves it above in the inspection box 1, the movable cover 4 blocks the opening on the top side of the penetrant storage tank 2 to carry out the cleaning, cleaning, color development, and observation processes of the workpiece penetrant inspection, preventing the cleaning water or color developer from dripping into the penetrant storage tank 2; as Figure 4 shown, when the lifting fixture 5 clamps the workpiece and moves it below in the inspection box 1, the movable cover 4 does not block the opening on the top side of the penetrant storage tank 2, so as to move the workpiece into the penetrant inspection agent in the penetrant storage tank 2 to perform the penetration process of the workpiece penetrant inspection. The setting of the movable cover 4 keeps each process of the workpiece penetrant inspection relatively independent, which can significantly improve the inspection quality of the workpiece.

[0072] As a preferred embodiment, the movable cover 4 is provided to include two cover plates 41, rollers 42, two guide rails 43 and an elastic member 44. The two cover plates 41 are symmetrically arranged with respect to the center line of the penetrant storage tank 2; the rollers 42 are rotatably arranged on the cover plates 41, and two rollers 42 are oppositely arranged at each end of the cover plates 41; the guide rails 43 are fixedly arranged in the flaw detection box 1, and the rollers 42 are rollingly arranged in the guide rails 43. The two guide rails 43 are symmetrically arranged with respect to the center line of the penetrant storage tank 2, and the two rollers 42 located at the same end of the cover plates 41 are connected to the same guide rail 43; as Figure 2-Figure 8 shown, by guiding the rollers 42 by the guide rails 43, the positions of the rollers 42 and the cover plates 41 can be adjusted, so that the cover plates 41 selectively block the opening on the top side of the penetrant storage tank 2. By providing two guide rails 43, good support can be provided for the cover plates 41, so that the cover plates 41 can slide smoothly.

[0073] As Figure 2 and Figure 3 shown, when the movable cover 4 blocks the opening on the top side of the penetrant storage tank 2, it is preferred that the cover plates 41 are inclined, so that one end of one cover plate 41 close to the other cover plate 41 is higher than the end of this cover plate 41 far from the other cover plate 41, so that the cleaning water can flow to both sides, avoiding water accumulation on the top side of the cover plates 41; as Figure 4 and Figure 5 shown, when the movable cover 4 does not block the opening on the top side of the penetrant storage tank 2, it is preferred that the two cover plates 41 are respectively located on both sides of the penetrant storage tank 2, so as to reduce the space occupied by the cover plates 41 and avoid interference between the cover plates 41 and the lifting fixture 5; for the above technical effects, the guide rails 43 are arranged in a gantry-like structure, and the middle position of the guide rails 43 is in a roof-like structure with the middle high and both sides low.

[0074] The elastic member 44 is used to automatically reset the cover plates 41. The elastic member 44 has elasticity and is arranged on the cover plates 41. In the natural state, by the abutment of the elastic member 44 against the cover plates 41, the cover plates 41 can be in a state of being located above the penetrant storage tank 2 and blocking the opening on its top side; when the elastic member 44 is abutted, the cover plates 41 are moved away from the opening on the top side of the penetrant storage tank 2.

[0075] The telescopic rod 6 is used to link the lifting fixture 5 and the movable cover 4. The telescopic rod 6 is fixedly arranged on the lifting fixture 5 and can abut against the elastic member 44. When the telescopic rod 6 abuts against the elastic member 44, it drives the cover plates 41 to move to the side of the penetrant storage tank 2. When the telescopic rod 6 does not abut against the elastic member 44, the cover plates 41 move to the upper part of the penetrant storage tank 2. That is, through the cooperation of the telescopic rod 6 and the elastic member 44, the cover plates 41 can automatically move to the corresponding positions, improving the flaw detection efficiency of the workpiece.

[0076] As Figure 9As shown in the figure, the elastic member 44 includes a sliding shaft 441, a sliding plate 442, a tension spring 443 and a connecting rod 444. The sliding shaft 441 is fixedly arranged in the flaw detection box 1; the sliding plate 442 is slidably arranged on the sliding shaft 441; the tension spring 443 is fixedly arranged on the sliding shaft 441, and one end of it is fixedly arranged on the top side of the sliding plate 442; both ends of the connecting rod 444 are rotatably arranged on the cover plate 41 and the sliding plate 442 respectively; in the natural state, by the pulling of the tension spring 443 on the sliding plate 442, the sliding plate 442 slides upward, thereby driving the connecting rod 444 and the lower end of the cover plate 41 to move upward, so as to move the cover plate 41 to the top side of the penetrant storage tank 2 to block the opening on the top side of the penetrant storage tank 2. When the sliding plate 442 is subjected to the pressure of the telescopic rod 6, it will slide downward and drive the connecting rod 444 and the cover plate 41 to also move downward, so that the cover plate 41 moves to the side of the penetrant storage tank 2 to expose the opening on the top side of the penetrant storage tank 2, allowing the workpiece to enter the penetrant storage tank 2; at the same time, the setting of the connecting rod 444 can make up for the change in the distance between the cover plate 41 and the sliding plate 442, so that the movement of the sliding plate 442 can drive the cover plate 41 to move.

[0077] As Figure 2 and Figure 3 shown, before the workpiece enters the penetrant storage tank 2, in order to avoid the workpiece colliding with the cover plate 41, the cover plate 41 should first be moved to the side of the penetrant storage tank 2, that is, the bottom end of the telescopic rod 6 should be located below the lifting fixture 5, as Figure 4 and Figure 5 shown, after the workpiece enters the penetrant storage tank 2, in order to reduce the occupied space of the device, it is preferably to make the bottom end of the telescopic rod 6 flush with the bottom side of the lifting fixture 5. In order to realize the position change of the bottom end of the telescopic rod 6 relative to the lifting fixture 5, the telescopic rod 6 needs to have a telescopic function.

[0078] Specifically, as Figure 1 and Figure 10 shown, the telescopic rod 6 includes a sleeve 61, a support rod 62 and a spring 63. The upper end of the sleeve 61 is fixedly arranged on the lifting fixture 5; the support rod 62 is slidably arranged in the support rod 62; one end of the spring 63 is fixedly arranged in the sleeve 61, and the other end abuts against the top side of the support rod 62. The elastic force of the spring 63 is greater than the elastic force of the tension spring 443. When the support rod 62 abuts against the top side of the sliding plate 442, first let the tension spring 443 extend, drive the sliding plate 442 to slide, and after the sliding plate 442 moves to the lowest point, then make the spring 63 contract, so that the telescopic rod 6 contracts.

[0079] As a preferred embodiment, the lifting fixture 5 includes a mounting plate 51, a workpiece holder 52 and a fixed rod 53, as Figure 11As shown in the figure, the mounting plate 51 is used to connect with the lifting equipment; the workpiece rack 52 is located below the mounting plate 51; the fixing rod 53 is fixedly arranged between the mounting plate 51 and the workpiece rack 52; after the workpiece is fixedly installed on the workpiece rack 52, the driving of the lifting equipment can drive the workpiece to move; at the same time, the mounting plate 51, the workpiece rack 52 and the fixing rod 53 enclose a frame structure, which can not only facilitate the installation and fixation of the workpiece, but also facilitate the contact of cleaning water and penetrant with the workpiece.

[0080] During the cleaning process of the workpiece, the cleaning water attached to the surface of the workpiece cannot be drained immediately, but will drip little by little. In order to accelerate the drying efficiency of the moisture on the surface of the workpiece, it is preferably provided with a water leakage hole 501 in the middle of the workpiece rack 52, and two water dividing plates 54 and two counterweights 55 are arranged in the lifting fixture 5. The middle position of the water dividing plate 54 is rotatably arranged in the water leakage hole 501, and the two water dividing plates 54 are symmetrically arranged about the center line of the water leakage hole 501; the counterweight 55 is fixedly arranged at one end of the bottom side of the water dividing plate 54 away from the center line of the water leakage hole 501; in the natural state, the counterweight 55 drives the water dividing plate 54 to tilt, so that the end of the water dividing plate 54 away from the counterweight 55 abuts against the workpiece, and the moisture on the workpiece can flow along the water dividing plate 54 to both sides of the flaw detection box 1, accelerating the drying efficiency of the surface of the workpiece; and when the lifting fixture 5 moves into the penetrant storage tank 2, the water dividing plate 54 can be rotated and hidden in the water leakage hole 501 to avoid occupying a large space.

[0081] The bottom side of the automobile beam frame is usually relatively flat. In order to increase the contact area between the water dividing plate 54 and the bottom side of the automobile beam frame and accelerate the drying efficiency of the automobile beam frame, the water dividing plate 54 is arranged to include a first rotating rod 541, a second rotating rod 542, a water receiving plate 543 and a water guiding plate 544. The middle position of the first rotating rod 541 is rotatably arranged in the water leakage hole 501; one end of the second rotating rod 542 is rotatably arranged in the water leakage hole 501 and is parallel to the first rotating rod 541; the water receiving plate 543 is rotatably arranged between the first rotating rod 541 and the second rotating rod 542 and is parallel to the workpiece rack 52; the water guiding plate 544 is fixedly arranged at one end of the first rotating rod 541 away from the water receiving plate 543 and is in sealed abutment with the water receiving plate 543, and the counterweight 55 is fixedly arranged at the bottom side of the water guiding plate 544; as Figure 12 shown, the workpiece rack 52, the first rotating rod 541, the second rotating rod 542 and the water receiving plate 543 enclose a parallelogram structure. No matter how the first rotating rod 541 rotates, the water receiving plate 543 is always parallel to the workpiece rack 52, so that the water receiving plate 543 can abut against the flat bottom side of the automobile beam frame, and the moisture on the surface of the workpiece can flow into the water receiving plate 543 as soon as possible and be drained to both sides in the flaw detection box 1 along the water guiding plate 544.

[0082] A non-destructive flaw detection method for an automobile beam frame of the present invention is as follows:

[0083] S1. Fix the lifting fixture 5 on the lifting equipment, and fix the workpiece after 24 hours of processing on the lifting fixture 5. When fixing the workpiece, it is preferable to make the bottom side of the workpiece parallel to the water receiving plate 543.

[0084] S2. Use the lifting equipment to drive the workpiece to move above the flaw detection box 1, and turn on the nozzle 3 to clean the workpiece, removing stains such as oil stains, scale, rust, paint, welding flux, and spatter on the surface of the workpiece. Among them, the cleaning water sprayed by the spray nozzle 3 has a temperature of 80 - 95 °C, and the cleaning time is 10 - 15 min. According to the situation of the stains on the surface of the workpiece, a cleaning agent can be appropriately added.

[0085] S3. After the surface of the workpiece is cleaned, let the workpiece stand still to make the surface of the workpiece in a dry state. Then use the lifting equipment to drive the workpiece to move into the penetrant in the penetrant storage box 2 for penetration, and let the workpiece stand still in the penetrant for 10 - 15 min to allow the penetrant to fully penetrate the workpiece.

[0086] During this penetration process, the temperature of the penetrant is maintained at 20 - 45 °C, and there is no component in the penetrant that reacts with the material of the workpiece.

[0087] S4. After the workpiece is penetrated, use the lifting equipment to drive the workpiece to move above the penetrant storage box 2, and turn on the nozzle 3 to remove the penetrant on the surface of the workpiece. At this time, the water pressure of the cleaning water sprayed by the cleaning spray 3 is not greater than 0.34 MPa, and the water temperature does not exceed 45 °C.

[0088] S5. Let the cleaned workpiece stand still and dry. After it is dry, take the workpiece out of the flaw detection box 1, and use the nozzle 3 to spray a developer on the surface of the workpiece, so that a developer with a thickness of about 0.05 mm adheres to the surface of the workpiece. Observe the color of the surface of the workpiece 10 - 30 min later to judge whether there are defects in the workpiece. If fluorescence appears on the surface of the workpiece, it indicates that there are defects in the workpiece; otherwise, it indicates that there are no defects in the workpiece.

[0089] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A nondestructive flaw detection device for automobile beams, used for performing fluorescent penetrant flaw detection on workpieces, characterized in that: It comprises a flaw detection box (1), a penetrant storage box (2), a nozzle (3), a movable cover (4) and a lifting fixture (5), wherein: The penetrant storage box (2) is fixedly arranged at the bottom of the flaw detection box (1), and the side walls of the two are arranged at a distance, and the top sides of the penetrant storage box (2) and the flaw detection box (1) are both provided with openings; The nozzle (3) is fixedly arranged at the top of the flaw detection box (1) and is used to remove the penetrant flaw detection agent and stains on the surface of the workpiece or to spray a color developer onto the surface of the workpiece; The movable cover (4) is movably arranged in the middle of the flaw detection box (1); When the lifting fixture (5) clamps the workpiece and moves it to the upper part of the flaw detection box (1), the movable cover (4) blocks the opening on the top side of the penetrant storage box (2) to carry out the cleaning, washing, coloring and observation processes of the workpiece penetrant flaw detection; when the lifting fixture (5) clamps the workpiece and moves it to the lower part of the flaw detection box (1), the movable cover (4) does not block the opening on the top side of the penetrant storage box (2) to move the workpiece into the penetrant flaw detection agent to carry out the penetration process of the workpiece penetrant flaw detection.

2. The nondestructive flaw detection device for automobile beam frame according to claim 1, characterized in that: The movable cover (4) comprises two cover plates (41), rollers (42) and two guide rails (43), wherein: The two cover plates (41) are symmetrically arranged about the center line of the penetrant storage box (2); The roller (42) is rotatably arranged on the cover plate (41), and two rollers (42) are arranged opposite to each other on each end of the cover plate (41); The guide rail (43) is fixedly arranged in the flaw detection box (1), and the roller (42) is rollingly arranged in the guide rail (43). The two guide rails (43) are symmetrically arranged about the center line of the penetrant storage box (2), and the two rollers (42) located at the same end of the cover plate (41) are connected to the same guide rail (43).

3. A nondestructive flaw detection device for automobile beams as claimed in claim 2, characterized in that: The guide rail (43) is a gantry-shaped structure, and the middle position of the guide rail (43) is high in the middle and low on both sides; When the movable cover (4) does not block the opening on the top side of the penetrant storage box (2), the two cover plates (41) are respectively located on both sides of the penetrant storage box (2); when the movable cover (4) blocks the opening on the top side of the penetrant storage box (2), the cover plates (41) are inclined, and one end of the cover plate (41) closer to the other cover plate (41) is higher than the end of the cover plate (41) farther from the other cover plate (41).

4. A nondestructive flaw detection device for automobile beams as claimed in claim 3, characterized in that: It also includes a telescopic rod (6), wherein the telescopic rod (6) is fixedly arranged on the lifting fixture (5); The movable cover (4) further comprises an elastic member (44), wherein the elastic member (44) is arranged on the cover plate (41); When the telescopic rod (6) abuts against the elastic member (44), the cover plate (41) is driven to move to the side of the penetrant storage box (2); when the telescopic rod (6) does not abut against the elastic member (44), the cover plate (41) moves to the top of the penetrant storage box (2).

5. The nondestructive flaw detection device for automobile beam frame according to claim 4, characterized in that: The elastic member (44) comprises a sliding shaft (441), a sliding plate (442), a tension spring (443) and a connecting rod (444), wherein: The sliding shaft (441) is fixedly arranged in the flaw detection box (1); The sliding plate (442) is slidably arranged on the sliding shaft (441); The tension spring (443) is fixedly arranged on the sliding shaft (441), and one end thereof is fixedly arranged on the top side of the sliding plate (442); The two ends of the connecting rod (444) are rotatably arranged on the cover plate (41) and the sliding plate (442) respectively.

6. The nondestructive flaw detection device for automobile beam frame according to claim 4, characterized in that: The telescopic rod (6) comprises a sleeve (61), a support rod (62) and a spring (63), wherein: The upper end of the sleeve (61) is fixedly arranged on the lifting fixture (5); The support rod (62) is slidably disposed inside the support rod (62); One end of the spring (63) is fixedly disposed in the sleeve (61), and the other end is abutted against the top side of the support rod (62).

7. The nondestructive flaw detection device for automobile beam frame according to claim 1, characterized in that: The lifting fixture (5) comprises a mounting plate (51), a workpiece frame (52) and a fixing rod (53), wherein: The mounting plate (51) is used to be connected to a lifting device; The workpiece rack (52) is located below the mounting plate (51); The fixing rod (53) is fixedly arranged between the mounting plate (51) and the workpiece frame (52).

8. The nondestructive flaw detection device for automobile beam frame according to claim 7, characterized in that: A water leakage hole (501) is provided in the middle of the workpiece rack (52); The lifting fixture (5) further comprises two water distribution plates (54) and two counterweights (55), wherein: The middle position of the water dividing plate (54) is rotatably arranged in the water leakage hole (501), and the two water dividing plates (54) are symmetrically arranged about the center line of the water leakage hole (501); The counterweight block (55) is fixedly arranged on the bottom side of the water distribution plate (54) at one end away from the center line of the water leakage hole (501).

9. The nondestructive flaw detection device for automobile beam frame according to claim 8, characterized in that: The water distribution plate (54) comprises a first rotating rod (541), a second rotating rod (542), a water receiving plate (543) and a water guide plate (544), wherein: The middle position of the first rotating rod (541) is rotatably disposed in the water leakage hole (501); One end of the second rotating rod (542) is rotatably disposed in the water leakage hole (501) and is parallel to the first rotating rod (541); The water receiving plate (543) is rotatably disposed between the first rotating rod (541) and the second rotating rod (542), and is parallel to the workpiece frame (52); The water guide plate (544) is fixedly arranged at one end of the first rotating rod (541) away from the water receiving plate (543) and is sealed against the water receiving plate (543). The counterweight block (55) is fixedly arranged on the bottom side of the water guide plate (544).

10. A non-destructive flaw detection method for automobile beams, using the non-destructive flaw detection device for automobile beams as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1, fixing the lifting fixture (5) on the lifting device, and fixing the workpiece on the lifting fixture (5); S2, using the lifting device to move the workpiece to the upper part of the flaw detection box (1), and opening the nozzle (3) to clean the workpiece and remove stains on the surface of the workpiece; S3, using the lifting device to move the workpiece into the penetrant testing agent in the penetrant storage box (2) for penetration; S4, using the lifting device to move the workpiece to the top of the penetrant storage box (2), and opening the nozzle (3) to remove the penetrant flaw detection agent on the surface of the workpiece; S5, using the nozzle (3) to spray a color developer onto the workpiece, observing the color of the workpiece surface, and determining whether the workpiece has defects.

Images