A high-toughness ductile cast iron detection device for light-weight load vehicles

Abstract

The application discloses a kind of high-strength ductile cast iron detection device for light-weight load truck, and relates to material detection technical field.The detection device includes X-ray thickness measuring device, and casting transfer robot is arranged at the side of X-ray thickness measuring device detection entrance, and conveying machine is arranged at the both sides of casting transfer robot;Casting transfer robot includes base pedestal, first horizontal slide is slidably arranged on the top of base pedestal, center column is rotatably arranged on the top of first horizontal slide, work arm is slidably arranged on the both sides of center column along vertical direction, and electromagnet is slidably arranged on the end of work arm along the extension direction of work arm.The application realizes the automatic feeding and discharging of ductile cast iron by casting transfer robot, replaces traditional manual handling mode, significantly reduces labor intensity, improves the automation level and production efficiency of detection operation;The setting of two-side conveying machine facilitates the shunting transmission of casting to be detected and casting detected, and optimizes production rhythm.

Description

Technical Field

[0001] This invention relates to the field of materials testing technology, specifically to a testing device for high-strength and high-toughness ductile iron castings used in lightweight heavy-duty vehicles. Background Technology

[0002] Ductile iron, also known as ductile iron, is a cast iron material made by adding a spheroidizing agent to molten iron, causing graphite to be distributed in a spherical form within the metal matrix. This differs from the flake graphite in ordinary gray cast iron. Spheroidal graphite has a smaller effect on matrix fragmentation, resulting in significantly higher tensile strength than gray cast iron. It also possesses plasticity and impact toughness, allowing it to withstand certain impact loads. Ductile iron can be used to manufacture heavy-duty components, and is widely used in chassis parts for heavy-duty vehicles.

[0003] In existing technologies, manual measurement or X-ray thickness gauges are commonly used to detect the overall thickness of ductile iron castings. The X-ray thickness gauge process requires manual handling to move the ductile iron casting to be tested onto the testing platform, and also requires transferring the tested ductile iron casting off the testing platform. This results in low testing efficiency. In the process of mass production of ductile iron castings, the efficiency of testing large quantities of castings needs to be further improved. Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight, high-strength and high-toughness ductile iron casting inspection device for heavy-duty vehicles, in order to solve the technical problems mentioned in the background art, such as the need for manual loading and unloading and low inspection efficiency of existing X-ray thickness measuring devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lightweight heavy-duty vehicle high-strength and high-toughness ductile iron casting inspection device, including an X-ray thickness measuring device, a casting transfer robot located on one side of the X-ray thickness measuring device inspection inlet, and conveyors on both sides of the casting transfer robot; The casting material transfer robot includes a base, a first horizontal slide is slidably disposed on the top of the base, a central support is rotatably disposed on the top of the first horizontal slide, working arms are slidably disposed on both sides of the central support along the vertical direction, and an electromagnet is slidably disposed at the end of the working arm along the extension direction of the working arm.

[0006] Preferably, a vertical slide is provided at one end of the working arm that mates with the central support column, and the vertical slide and the central support column are connected by a linear guide rail and a slider to form a sliding fit.

[0007] Preferably, the central support column and the first horizontal slide are connected by an arc-shaped rack and pinion mechanism. The arc-shaped rack and pinion mechanism includes an arc-shaped gear ring fixed to the top of the first horizontal slide and a drive gear installed at the bottom of the central support column and meshing with the arc-shaped gear ring. The bottom of the central support column is fixedly connected to a rotating ring inside the arc-shaped gear ring.

[0008] Preferably, the X-ray thickness measuring device includes a detection chamber, a detection inlet is provided on one side of the chamber, and a door for sealing the detection inlet is also provided on the detection chamber. The detection platform is located inside the detection chamber and below the detection inlet. An X-ray tube is installed inside the inspection chamber and above the inspection platform, while a receiver is installed inside the inspection chamber and below the inspection platform.

[0009] Preferably, the testing platform is made of carbon fiber composite material.

[0010] Preferably, the inner walls of the testing chamber are lined with multiple layers of lead plates, and the door of the chamber is lined with lead plates.

[0011] Preferably, an upwardly extending door frame is provided on the outer side of the detection box and at the detection entrance, and a sliding groove is provided on the inner side of the door frame to accommodate the door and support the door to slide up and down.

[0012] Preferably, a winding shaft is rotatably mounted on the top of the door frame, and a winding wheel is coaxially fixed on the winding shaft. A steel wire rope is wound on the winding wheel, and the end of the steel wire rope is connected to the door. A first pulley is coaxially engaged on the winding shaft, and a second pulley is positioned at a height close to the first horizontal slide block, detecting the surface of the box body. The first and second pulleys are engaged by a synchronous belt. A third pulley is coaxially engaged with the second pulley, and a fourth pulley corresponding to the third pulley is mounted on the base. The third and fourth pulleys are engaged by a synchronous belt, and a transmission gear is coaxially engaged with the fourth pulley. A rack that engages with the transmission gear is slidably mounted on the base, and a driving component for moving the rack is mounted on the first horizontal slide block.

[0013] Preferably, the driving component includes a slide rod fixed to the top of the first horizontal slide block, a guide block fixed to the top of the rack, an avoidance hole for the slide rod to pass through the guide block, a spring sleeved on the outside of the guide block, the minimum elastic force of the spring being greater than the weight of the box door, and a limit block fixed to one end of the base near the X-ray thickness measuring device.

[0014] Preferably, the door includes a door frame, the top of the door frame is provided with a lifting lug, and a radiation shield is fixed inside the door frame by bolts.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves automatic loading and unloading of ductile iron castings through a casting transfer robot, replacing the traditional manual handling method, significantly reducing labor intensity, and improving the automation level and production efficiency of the inspection operation; at the same time, the setting of conveyors on both sides facilitates the separate transmission of castings to be inspected and those that have been inspected, further optimizing the production cycle.

[0016] 2. In this invention, the casting transfer robot uses an electromagnet to grasp the casting material. Combined with the horizontal movement of the first horizontal slide, the rotation of the central support, and the vertical lifting and extension of the working arm, it achieves flexible picking and placing with multiple degrees of freedom. It can accurately place the casting material on the inspection platform, adapting to the inspection needs of casting materials of different specifications and sizes. Moreover, the non-contact electromagnetic adsorption avoids the surface damage to the workpiece that may be caused by mechanical clamping.

[0017] 3. This invention achieves automatic opening and closing of the chamber door through a mechanical linkage structure. When the first horizontal slide moves the casting material transfer robot close to the detection entrance, the drive component pushes the rack to move, which in turn drives the winding shaft to rotate through the transmission gear and synchronous pulley set, thus winding up the wire rope to open the chamber door. When the robot moves away, it automatically resets and closes under the action of gravity. This not only ensures the radiation sealing safety during the X-ray detection process, but also eliminates the need for an additional independent power source to control the chamber door, simplifying the equipment structure and reducing energy consumption and maintenance costs.

[0018] 4. This invention uses carbon fiber composite material plates as the detection platform, which are lightweight, high-strength, and have low X-ray absorption rate, effectively reducing background noise interference and improving the detection accuracy of X-ray thickness measurement. At the same time, the inner wall and door of the detection chamber are covered with multiple layers of lead plates, providing good radiation protection performance and ensuring the safety of the operator's working environment.

[0019] 5. This invention, through two working arms, can simultaneously perform the adsorption of the casting material to be tested and the transfer of the casting material that has already been tested, greatly improving the testing efficiency of the casting material. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ; Figure 4 This is a partial structural diagram of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of part A in the image; Figure 6 For the present invention Figure 4 Enlarged view of part B in the image; Figure 7 For the present invention Figure 4 Enlarged view of section C in the image; Figure 8 This is a schematic diagram of the structure of the present invention. Figure 4 ; Figure 9 This is a structural diagram of the X-ray thickness measurement device of the present invention; Figure 10 This is a structural diagram of the cabinet door of the present invention.

[0021] In the picture: 1-X-X-ray thickness gauge, 11-Detection platform, 12-Box door, 121-Door frame, 122-Lifting lug, 123-Radiation shielding plate, 13-Box door frame, 131-Slide groove. 21-Basic base, 211-Limit block, 22-First horizontal slide, 221-Slide rod, 222-Spring, 23-Central support, 24-Working arm, 25-Electromagnet, 26-Vertical slide, 27-Second horizontal slide, 28-Electromagnet mounting base 3-Conveyor 41-Rewinding shaft, 42-Rewinding wheel, 43-First pulley, 44-Second pulley, 45-Third pulley, 46-Fourth pulley, 47-Transmission gear, 48-Rack, 481-Guide block. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1 to 10 As shown, a lightweight heavy-duty vehicle high-strength and high-toughness ductile iron casting inspection device includes an X-ray thickness measuring device 1, a casting transfer robot is set on one side of the inspection entrance of the X-ray thickness measuring device 1, and conveyors 3 are set on both sides of the casting transfer robot.

[0024] Of the two conveyors 3, one conveyor is used to transport the castings to be tested inward, and is temporarily referred to as the "feed conveyor"; the other conveyor is used to transport the tested castings outward, and is temporarily referred to as the "discharge conveyor". Depending on actual needs, an industrial robotic arm, such as a six-axis robot, can be added to the end of the discharge conveyor to stack or transfer the tested castings, and to separate the castings with acceptable thickness from those with unacceptable thickness for stacking or transfer.

[0025] The casting transfer robot can transfer the casting to be inspected from the surface of the feeding conveyor to the inspection platform 11 inside the X-ray thickness measuring device 1; at the same time, it can also transfer the casting that has been inspected on the inspection platform 11 to the discharge conveyor. The X-ray thickness measuring device 1 here plays the role of automatically loading and unloading materials into the X-ray thickness measuring device 1.

[0026] In one specific embodiment, the casting material transfer robot includes a base base 21, on the top of which a first horizontal slide block 22 is slidably disposed. The sliding direction of the first horizontal slide block 22 is consistent with the orientation of the detection inlet of the X-ray thickness measuring device 1. A central support column 23 is rotatably disposed on the top of the first horizontal slide block 22. Working arms 24 are slidably disposed vertically on both sides of the central support column 23, extending horizontally. An electromagnet 25 is slidably disposed at the end of the working arm 24 and along its extension direction.

[0027] In this embodiment, the electromagnet 25 is used to adsorb the ductile iron casting to be tested or the casting that has already been tested. The casting is transferred by electromagnetic adsorption, which can avoid mechanical damage to the surface of the casting caused by clamping and transfer. At the same time, it can facilitate the transfer of castings of various shapes, thereby improving the applicability of this testing device.

[0028] In this embodiment, the working arm 24 is welded from a metal square tube. A vertical slide 26 is provided at one end of the working arm 24 that mates with the central support column 23. The vertical slide 26 and the central support column 23 are connected in a sliding fit via a linear guide rail and a slider. For example, the corresponding linear guide rail is fixed vertically to the surface of the central support column 23 by bolts, and the corresponding slider is fixed to the vertical slide 26 by bolts, thus creating a sliding fit between the linear guide rail and the slider. Since linear guide rails and sliders are conventional technologies, the details regarding the sliding fit between linear guide rails and sliders will not be elaborated further below.

[0029] Preferably, the working arm 24 is driven to slide up and down using a drive motor, gears, and racks. The corresponding drive motor is fixed to the vertical slide 26, the corresponding gear is coaxially engaged with the power output shaft of the drive motor, and the corresponding rack is fixed vertically to the surface of the central support 23, meshing with the corresponding gear. Since the use of a drive motor, gears, and racks for driving is existing technology, the implementation methods and principles of using a drive motor, gears, and racks will not be elaborated further below.

[0030] In this embodiment, the central support column 23 and the first horizontal slide 22 are connected by an arc-shaped rack and pinion rotation mechanism. The arc-shaped rack and pinion rotation mechanism includes an arc-shaped gear ring fixed to the top of the first horizontal slide 22 and a drive gear installed at the bottom of the central support column 23 and meshing with the arc-shaped gear ring. Simultaneously, the bottom of the central support column 23 is fixedly connected to a rotating ring inside the arc-shaped gear ring. A rotary motor that meshes with the drive gear is fixed on the first horizontal slide 22. The rotary motor drives the drive gear to rotate, causing the drive gear to rotate circumferentially along the arc-shaped gear ring, which in turn drives the central support column 23 to rotate along the axis of the arc-shaped gear ring.

[0031] In this embodiment, the base 21 is welded from a metal square tube, and adjustable anchor bolts are added according to actual usage requirements. The first horizontal slide 22 and the base 21 are connected by a linear guide rail and a slider to form a sliding fit; the first horizontal slide 22 is driven by a drive motor, gears, and racks to move along the base 21.

[0032] In one specific embodiment, a second horizontal slide block 27 is slidably mounted on the top of the working arm 24 via a linear guide rail and a slider. The second horizontal slide block 27 is driven by a drive motor, gears, and a rack, causing it to move along the working arm 24. An electromagnet mounting base 28 is fixedly connected below the second horizontal slide block 27, and the electromagnet 25 is fixed to the bottom of the electromagnet mounting base 28. Thus, the second horizontal slide block 27 can move along the working arm 24. Combined with the rotatable function of the central support column 23 and the working arm 24, the electromagnet 25 can be precisely adjusted in the horizontal plane to accurately adsorb ductile iron castings from the surface of the feed conveyor and inside the X-ray thickness gauge 1.

[0033] In this embodiment, the X-ray thickness measuring device 1 includes a detection chamber with a detection inlet on one side. The detection chamber also has a door 12 for sealing the detection inlet. The detection platform 11 is located inside the detection chamber and below the detection inlet. An X-ray tube is located inside the detection chamber and above the detection platform 11, and a receiver is located inside the detection chamber and below the detection platform 11. The X-ray tube and receiver are positioned vertically opposite each other for penetrating thickness measurement of the ductile iron casting located on the detection platform 11.

[0034] Preferably, the detection platform 11 is made of carbon fiber composite material, which is lightweight, high-strength, and has low X-ray absorption, effectively reducing signal interference during the detection process and improving detection accuracy. The surface of the detection platform 11 may be provided with anti-slip textures or positioning grooves to prevent the ductile iron casting from sliding or shifting during detection, ensuring the stability and accuracy of the detection data. The X-ray beam emitted by the X-ray tube penetrates the ductile iron casting located on the detection platform 11 and is received by the receiver below. The receiver converts the received X-ray signal into an electrical signal and transmits it to the processing unit of the control system. The processing unit calculates the real-time thickness value of each part of the casting based on a preset algorithm model and the material density parameters of the ductile iron casting, and compares it with the standard thickness range. If the thickness exceeds the allowable tolerance range, the control system determines that the casting is a defective product.

[0035] In this embodiment, the inner walls of the detection chamber are covered with multiple layers of lead plates, and the door 12 is also covered with lead plates to shield X-ray radiation and ensure the safety of operators and the surrounding environment.

[0036] As one specific implementation method, such as Figure 9 As shown, an upwardly extending door frame 13 is provided on the outer side of the detection chamber and at the detection entrance. The inner side of the door frame 13 is provided with a sliding groove 131 for accommodating the door 12 and supporting the door 12 to slide up and down. By driving the door 12 to move upward, the detection entrance of the detection chamber can be opened. When the door 12 slides downward and blocks the detection entrance, the door 12, made of lead plate, can effectively shield the detection entrance.

[0037] To further ensure the effective sealing of the chamber door 12 during X-ray thickness measurement operations and avoid the risk of X-ray leakage due to the chamber door failing to close, a transmission mechanism is provided between the first horizontal slide 22 and the chamber door 12. When the first horizontal slide 22, carrying the central support 23 and the working arm 24, approaches the X-ray thickness measurement device 1, the chamber door 12 opens. After the casting to be inspected is placed on the surface of the inspection platform 11, when the first horizontal slide 22 moves away from the X-ray thickness measurement device 1, the transmission mechanism drives the chamber door 12 to close.

[0038] In one specific embodiment, the transmission mechanism includes a winding shaft 41 rotatably mounted on the top of the door frame 13. A winding wheel 42 is coaxially fixed on the winding shaft 41, and a steel wire rope is wound on the winding wheel 42. The end of the steel wire rope is connected to the door 12. A first pulley 43 is coaxially engaged on the winding shaft 41. A second pulley 44 is positioned at a height close to the first horizontal slide block 22, detecting the surface of the box body. The first pulley 43 and the second pulley 44 are engaged by a synchronous belt. A third pulley 45 is coaxially engaged with the second pulley 44. A fourth pulley 46 corresponding to the third pulley 45 is provided on the base base 21. The third pulley 45 and the fourth pulley 46 are engaged by a synchronous belt. A transmission gear 47 is coaxially engaged with the fourth pulley 46. A rack 48 that engages with the transmission gear 47 is slidably mounted on the base base 21. A driving member for pushing the rack 48 to move is provided on the first horizontal slide block 22. When the first horizontal slide 22 moves, it moves synchronously with the rack 48. The rack 48 drives the transmission gear 47 to rotate, which in turn drives the winding shaft 41 to rotate through the transmission chain of the fourth pulley 46, the third pulley 45, the second pulley 44, and the first pulley 43. When the first horizontal slide 22 moves away from the detection box, the winding shaft 41 rotates to release the wire rope. Under the action of gravity, the box door 12 moves downward and slides down along the slide groove 131 until the detection entrance is completely closed. Conversely, when the first horizontal slide 22 moves towards the detection box, the winding shaft 41 rotates in the opposite direction to wind up the wire rope. Under the tension of the wire rope, the box door 12 slides up along the slide groove 131 to open the detection entrance. This linkage mechanism ensures that the detection entrance is open when the casting transfer robot is performing loading and unloading operations, and closed and shielded during X-ray inspection, achieving automated interlocking protection.

[0039] In this embodiment, the process of the working arm 24 attracting the casting to be tested via the electromagnet 25 and transferring the casting to the X-ray thickness measuring device 1 is mainly divided into two stages. The first stage is the process of the working arm 24 moving the casting towards the detection chamber, and the second stage is the process of the working arm 24 carrying the casting into the interior of the detection chamber. Therefore, to ensure that the working arm 24 can smoothly deliver the casting to be tested into the detection chamber in the second stage, it is necessary to ensure that the opening of the chamber door 12 is completed during the first stage to avoid interference from the chamber door 12 in the entry of the working arm 24 into the detection chamber. During the movement of the working arm 24 in the second stage, the chamber door 12 does not need to move; otherwise, it would accelerate the wear of the chamber door 12, reduce its service life, and increase the risk of X-ray leakage. Therefore, to prevent the door 12 from moving synchronously during the second stage of the working arm 24's movement, the driving component on the first horizontal slide 22 for pushing the rack 48 includes a slide rod 221 fixed to the top of the first horizontal slide 22. The extension direction of the slide rod 221 is consistent with the movement direction of the first horizontal slide 22. A guide block 481 is fixed to the top of the rack 48, and the guide block 481 has a clearance hole for the slide rod 221 to pass through. A spring 222 is sleeved on the outside of the guide block 481, and the minimum elastic force of the spring 222 is greater than the weight of the door 12. A limit block 211 is fixed to one end of the base 21 near the X-ray thickness measuring device 1. During the first stage of the working arm 24's movement, the first horizontal slide 22 pushes the guide block 481 to move via the spring 222, which in turn drives the rack 48 to move. This, in turn, drives the winding shaft 41 to rotate and wind up the wire rope through the aforementioned transmission chain, causing the door 12 to slide upward and open. As the first horizontal slide 22 continues to move toward the detection box, the rack 48 contacts the limiting block 211. Due to the obstruction of the limiting block 211, the rack 48 cannot continue to move. When the first horizontal slide 22 continues to move, it enters the second stage of the movement of the working arm 24. At this time, the first horizontal slide 22 and the slide rod 221 continue to move toward the X-ray thickness measuring device 1. The slide rod 221 slides in the clearance hole of the guide block 481, and the spring 222 is compressed until the working arm 24 moves the casting attracted by the electromagnet 25 to a suitable horizontal position and stops. Then the working arm 24 lowers or rises to place the casting from the electromagnet 25 onto the detection platform 11, or to attract and lift the casting located on the detection platform 11. During this process, the rack 48 is stopped by the limit block 211 and remains stationary. The slide bar 221 slides relative to the guide block 481 and compresses the spring 222, so that the door 12 remains fully open. At the same time, the door 12 remains stationary during the process of the working arm 24 entering into the detection box or moving out of the detection box, thus avoiding mechanical interference and wear caused by the synchronous movement of the door 12 with the working arm 24.

[0040] Furthermore, such as Figure 10As shown in Figure 1, the container door 12 includes a door frame 121. A lifting lug 122 is provided at the top of the door frame 121 for connecting the wire rope on the winding reel 42. A radiation shielding plate 123, made of lead, is bolted to the inside of the door frame 121. Thus, if the casting material transfer robot malfunctions and the container door 12 cannot be opened, the radiation shielding plate 123 can be removed to open the container door 12 for emergency handling in case of malfunction.

[0041] This embodiment also includes a controller for controlling the operation of electrical components such as drive motors, conveyor 3, X-ray tube, and receiver, such as a PLC control system. PLC control is an existing technology, and the specific control method can be adaptively programmed and adjusted according to the actual detection requirements, which will not be elaborated further.

[0042] To further improve the precise adsorption performance of the electromagnet 25, an image recognition device can be installed at the top of the working arm 24. This device can quickly locate the specific position of the casting to be inspected or the casting that has already been inspected, enabling the casting transfer robot to quickly identify and transfer the casting.

[0043] Workflow: Step 1 (e.g.) Figure 8 As shown), the feed conveyor 3 transports the ductile iron casting to be tested to the vicinity of the casting transfer robot. The two working arms 24 are responsible for adsorbing the casting for feeding and testing and discharging, respectively. The feeding working arm 24 rotates above the feed conveyor via the central support 23, and then descends to the vicinity above the casting to be tested. The specific position of the casting is identified by the image recognition device. Then, through the precise control of the first horizontal slide 22 and the second horizontal slide 27, the electromagnet 25 is made to stick to the upper surface of the casting. Then, the electromagnet 25 is energized to generate a magnetic field and adsorb the casting.

[0044] Step 2 (as shown) Figure 1 As shown), the working arm 24 rises to the height of the detection inlet of the detection box, while the central support 23 rotates to align the working arm 24 with the detection inlet.

[0045] Step 3 (as shown) Figure 2as shown), the first horizontal sliding seat 22 moves in the direction toward the X-ray thickness measuring device 1, so that the working arm 24 gradually approaches the X-ray thickness measuring device 1. This process belongs to the first stage of the above-mentioned movement of the working arm 24. In this stage, the first horizontal sliding seat 22 drives the sliding rod 221 to move synchronously, and the sliding rod 221 pushes the guide block 481 and the rack 48 to move through the spring 222. The movement of the rack 48 passes through the transmission chain composed of the transmission gear 47, the fourth pulley 46, the third pulley 45, the second pulley 44 and the first pulley 43, drives the winding shaft 41 to rotate and wind the steel wire rope, thereby pulling the box door 12 to slide upward along the sliding groove 131 until the detection inlet is fully opened. In this process, due to the elastic force of the spring 222, the box door 12 can be smoothly lifted, and this opening action is completed before the rack 48 contacts the limit block 211, leaving sufficient passage space for the subsequent feeding of the cast material.

[0046] The fourth step (as Figure 3 shown), the first horizontal sliding seat 22 continues to move toward the inside of the detection box, and this process belongs to the second stage of the above-mentioned movement of the working arm 24. At this time, the first horizontal sliding seat 22 continues to move toward the detection box, while the rack 48 remains stationary as it abuts against the limit block 211. With the displacement of the first horizontal sliding seat 22, the sliding rod 221 fixed thereon slides relatively with respect to the guide block 481, and compresses the spring 222 sleeved thereon. In this process, since the power input end (the rack 48) of the transmission chain is locked, the winding shaft 41 stops rotating, and the length of the steel wire rope remains unchanged, thereby ensuring that the box door 12 remains stationary at the highest position where it is fully opened.

[0047] In the fifth step, the working arm 24 descends to make the cast material contact the detection platform 11, then the electromagnet 25 is powered off to place the cast material to be detected on the detection platform 11, and then the working arm 24 moves out of the detection box, and the box door 12 is closed.

[0048] In the sixth step, the thickness of the cast material is detected by the X-ray tube and the receiver. After the rays emitted by the X-ray tube penetrate the ductile iron cast material placed on the detection platform 11, the receiver below captures the attenuated ray signal in real time and converts it into an electrical signal for transmission to the control system. The control system quickly calculates the actual thickness value of each detection point of the cast material according to the preset material density parameters and algorithm model, and compares and judges it with the standard tolerance range. If the data is within the allowable range, it is judged as a qualified product; if it exceeds the tolerance range, it is judged as an unqualified product, and the detection result is marked and stored.

[0049] Step 7: After the inspection is completed, the unloading arm 24 rotates to the height of the inspection inlet of the inspection chamber via the central support 23, and then moves into the inspection chamber. This process also includes the first and second stages of the movement of the unloading arm 24 (the specific process will not be described in detail). After the unloading arm 24 enters the inspection chamber, it descends and uses the electromagnet 25 to attract the inspected casting. Subsequently, the first horizontal slide 22 drives the unloading arm 24 to move out of the inspection chamber, and the inspected casting is taken out from inside the X-ray thickness measuring device 1.

[0050] Step 8: If there are still castings to be tested and further testing is required, repeat step 1. While repeating step 1, the unloading arm 24 moves to the upper surface of the unloading conveyor 3, the corresponding electromagnet 25 on the unloading arm 24 is de-energized, the tested casting is placed on the upper surface of the unloading conveyor 3, and the casting is transferred to the next process.

[0051] Once all castings have been inspected, simply place the last casting to be inspected on the upper surface of the conveyor 3 used for discharging.

[0052] Here, the adsorption of the casting material to be tested and the transfer of the casting material that has been tested can be carried out simultaneously through two working arms 24, which greatly improves the testing efficiency of the casting material.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A testing device for high-strength and high-toughness ductile iron castings for lightweight heavy-duty vehicles, comprising an X-ray thickness measuring device (1), characterized in that: A casting transfer robot is installed on one side of the X-ray thickness measuring device (1) detection entrance, and conveyors (3) are installed on both sides of the casting transfer robot. The casting material transfer robot includes a base base (21), a first horizontal slide (22) is slidably arranged on the top of the base base (21), a central support (23) is rotatably arranged on the top of the first horizontal slide (22), working arms (24) are slidably arranged on both sides of the central support (23) along the vertical direction, and an electromagnet (25) is slidably arranged at the end of the working arm (24) along the extension direction of the working arm (24).

2. The testing device for lightweight heavy-duty vehicle high-strength and high-toughness ductile iron castings according to claim 1, characterized in that: The working arm (24) is equipped with a vertical slide (26) at one end that cooperates with the central support (23). The vertical slide (26) and the central support (23) are connected by a linear guide rail and a slider to form a sliding fit.

3. The testing device for lightweight heavy-duty vehicle high-strength and high-toughness ductile iron castings according to claim 1, characterized in that: The central support (23) and the first horizontal slide (22) are connected by an arc-shaped rack and pinion mechanism. The arc-shaped rack and pinion mechanism includes an arc-shaped gear ring fixed to the top of the first horizontal slide (22) and a drive gear installed at the bottom of the central support (23) and meshing with the arc-shaped gear ring. The bottom of the central support (23) is fixedly connected to the rotating ring inside the arc-shaped gear ring.

4. The testing device for lightweight heavy-duty vehicle high-strength and high-toughness ductile iron castings according to claim 1, characterized in that: The X-ray thickness measuring device (1) includes a detection box, a detection inlet is provided on one side of the box, and a door (12) for sealing the detection inlet is also provided on the detection box. The detection platform (11) is located inside the detection box and below the detection inlet. An X-ray tube is installed inside the detection chamber and above the detection platform (11), and a receiver is installed inside the detection chamber and below the detection platform (11).

5. The testing device for lightweight heavy-duty vehicle high-strength and high-toughness ductile iron castings according to claim 4, characterized in that: The testing platform (11) is made of carbon fiber composite material.

6. The testing device for lightweight heavy-duty vehicle high-strength and high-toughness ductile iron castings according to claim 4, characterized in that: The inner walls of the testing box are covered with multiple layers of lead plates, and the door (12) is covered with lead plates.

7. The testing device for lightweight heavy-duty vehicle high-strength and high-toughness ductile iron castings according to claim 4, characterized in that: An upwardly extending door frame (13) is provided on the outside of the detection box and at the detection entrance. The inner side of the door frame (13) is provided with a sliding groove (131) for accommodating the door (12) and supporting the door (12) to slide up and down.

8. The testing device for lightweight heavy-duty vehicle high-strength and high-toughness ductile iron castings according to claim 7, characterized in that: A winding shaft (41) is rotatably mounted on the top of the door frame (13). A winding wheel (42) is coaxially fixed on the winding shaft (41). A steel wire rope is wound on the winding wheel (42), and the end of the steel wire rope is connected to the door (12). A first pulley (43) is coaxially fitted on the winding shaft (41). A second pulley (44) is positioned at a height close to the first horizontal slide block (22) and is fitted with the first pulley (43) and the second pulley (44) by a synchronous belt. 4) A third pulley (45) is coaxially fitted, and a fourth pulley (46) corresponding to the third pulley (45) is provided on the base base (21). The third pulley (45) and the fourth pulley (46) are connected by a synchronous belt. The fourth pulley (46) is coaxially fitted with a transmission gear (47). The base base (21) is also slidably fitted with a rack (48) that cooperates with the transmission gear (47). The first horizontal slide (22) is provided with a driving member for pushing the rack (48) to move.

9. The testing device for lightweight heavy-duty vehicle high-strength and high-toughness ductile iron castings according to claim 8, characterized in that: The driving component includes a slide rod (221) fixed to the top of the first horizontal slide (22), a guide block (481) fixed to the top of the rack (48), a clearance hole for the slide rod (221) to pass through the guide block (481), a spring (222) sleeved on the outside of the guide block (481), the minimum elastic force of the spring (222) being greater than the weight of the box door (12), and a limit block (211) fixed to one end of the base base (21) near the X-ray thickness measuring device (1).

10. The testing device for lightweight heavy-duty truck high-strength and high-toughness ductile iron castings according to claim 4, characterized in that: The door (12) includes a door frame (121), the top of the door frame (121) is provided with a lifting lug (122), and the interior of the door frame (121) is fixed with a radiation shield (123) by bolts.

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