Internal combustion engine valve rod crack detection equipment and detection method thereof

Abstract

The invention provides an internal combustion engine valve rod crack detection device and a detection method thereof, and relates to the technical field of valve rod detection, the internal combustion engine valve rod crack detection device comprises a slide rail assembly, a material seat and a material rack, the material seat is slidably mounted on the slide rail assembly, the material rack is mounted on the material seat and is provided with openings along two sides of the slide rail assembly, and the material rack is further provided with four stations in sequence; a table top is arranged on each station, the sliding rail assemblies penetrate through and are connected with the table tops, the table tops are located at the same height and are communicated when the table tops are aligned, the two stations in the middle are each provided with a platform and a lifting assembly for driving the corresponding table top to ascend or descend, a cleaning agent is injected into the previous platform, and a coloring agent is injected into the next platform. According to the automatic crack detection device for the valve rod, automatic detection of cracks of the valve rod is achieved, the cost and errors of manual detection are reduced, and the problem that the working efficiency of crack detection of the valve rod is low is solved.

Description

Technical Field

[0001] This invention relates to the field of valve stem testing technology, and more specifically, to a device and method for detecting cracks in the valve stem of an internal combustion engine. Background Technology

[0002] During the machining process, valve stems may develop pits or micro-cracks due to material inhomogeneity or the influence of the cutting tool. While these pits may be visible to the naked eye after surface treatment, the micro-cracks are often covered by the surface coating, making these potential defects undetectable. These undetected cracks can lead to valve stem breakage after high-intensity use, severely impacting engine operation and potentially causing safety issues.

[0003] To address this issue, Chinese invention patent CN119310095B discloses a valve stem crack detection structure and a feeding machine with the detection structure. This patent uses a single feeding method for detection. Although this method can effectively detect surface cracks and pits, the detection efficiency is relatively low because only one channel is used for continuous processing, which affects the overall production speed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide an internal combustion engine valve stem crack detection device and method, which solves the problem of low efficiency in valve stem crack detection.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a valve stem crack detection device for internal combustion engines, including a slide rail assembly, a material seat, and a material rack. The material seat is slidably mounted on the slide rail assembly, and the material rack is mounted on the material seat with openings along both sides of the slide rail assembly. Four workstations are sequentially arranged, each with a platform. The slide rail assembly passes through and connects these platforms. When all platforms are at the same height and aligned, the slide rail assembly is connected. The two middle workstations each have a platform and a lifting assembly for driving their respective platforms up or down. The first platform is filled with a cleaning agent, and the second platform is filled with a coloring agent. The last workstation is the fourth workstation, with its platform sliding vertically along the slide rail assembly. The fourth workstation includes an auxiliary detection component. Support platforms and a third cylinder are provided on both sides of the fourth platform's sliding path. The auxiliary detection component is connected to the top of the third cylinder and is used to drive the valve stem on the material rack to rotate. An industrial camera is mounted on the support platform via a bracket, and the industrial camera is positioned facing the openings on both sides of the material rack.

[0006] According to one embodiment of the present invention, four workstations are designated as a first workstation, a second workstation, a third workstation, and a fourth workstation, and a power assembly for driving the material holder to move along the slide rail assembly is provided between the four workstations. The first workstation has a first platform and a first table, with the first table mounted on the first platform. The second workstation has a second table, the third workstation has a third table, and the fourth workstation has a fourth platform and a fourth table. The top of the fourth platform is provided with a guide rail perpendicular to the slide rail assembly, and the bottom of the fourth table is connected to a guide block adapted to the guide rail. A lead screw is also installed at the top of the platform, which is located between two guide rails. A fourth motor connected to the lead screw is installed on the fourth platform. A nut block adapted to the lead screw is connected to the lower end of the fourth platform. The second station also includes a second platform and a first lifting assembly. The second platform is installed on the second platform through the first lifting assembly so that the first lifting assembly can drive the second platform to enter or leave the second platform. The third station also includes a third platform and a second lifting assembly. The third platform is installed on the third platform through the second lifting assembly so that the second lifting assembly can drive the third platform to enter or leave the third platform.

[0007] According to one embodiment of the present invention, the slide rail assembly includes a first slide rail, a second slide rail, a third slide rail, and a fourth slide rail. The first slide rail is mounted on a first platform, the second slide rail is disposed on the second platform, the third slide rail is disposed on the third platform, and the fourth slide rail is disposed on a fourth platform. A fifth slide rail is provided between the second and third slide rails and is mounted at the connection between the second and third platforms. A sixth slide rail is provided between the third and fourth slide rails and is mounted at the connection between the third and fourth platforms. A seventh slide rail is also provided at the end of the fourth slide rail away from the sixth slide rail and is mounted on a support platform on one side. The fifth, sixth, and seventh slide rails are used to smoothly transition the gaps between the second, third, and fourth slide rails.

[0008] According to one embodiment of the present invention, the bottom end of the material seat is provided with a slider connected to the slide rail assembly, the material seat is provided with a slot, the material rack is provided with a placement groove for placing a valve stem, and the bottom of the material rack is provided with a positioning post corresponding to the slot.

[0009] According to one embodiment of the present invention, the first lifting assembly includes a first lifting arm, a first guide column, a first top plate, and a first cylinder. The first lifting arm and the first top plate are respectively connected to the two ends of the first guide column. The first guide column is vertically slidably mounted on the top of the second platform. The first lifting arm is fixedly connected to the bottom of the second platform. The first cylinder is vertically mounted on the top surface of the second platform. The second lifting assembly includes a second lifting arm, a second guide column, a second top plate, and a second cylinder. The second lifting arm and the second top plate are respectively connected to the two ends of the second guide column. The second guide column is vertically slidably mounted on the top of the third platform. The second lifting arm is fixedly connected to the bottom of the third platform. The second cylinder is vertically mounted on the top surface of the third platform.

[0010] According to one embodiment of the present invention, the power assembly includes a belt and push blocks. The belt has pulleys at both ends. One pulley at one end of the belt is fixed to the upper surface of the first platform by a mounting base, and the pulley at the other end of the belt is fixed to the upper surface of the support platform by a mounting base. A third motor for driving the pulley at the other end is mounted on the support platform. The belt is located on one side of the slide rail assembly. The push blocks are evenly arranged on the belt. The lower layer of the belt is lower than the lower surface of the material seat, and the upper layer of the belt is higher than the upper surface of the material seat.

[0011] According to one embodiment of the present invention, the auxiliary detection component includes a support cover, a first clamping plate, and a second clamping plate. A connecting plate is connected to the top ends of two adjacent third cylinders. The top end of the support cover is fixedly connected to the connecting plate. The support cover has a U-shaped structure with its opening facing downwards. A lifting plate is provided inside the support cover. A first motor corresponding to a placement slot is provided at the bottom of the lifting plate. A friction disc is connected to the output end of the first motor. The first clamping plate and the second clamping plate are symmetrically arranged on both sides of the first motor, which is arranged in a straight line. Rollers are rotatably provided at the ends of the first clamping plate and the second clamping plate that are close to each other. A first adjusting component and a second adjusting component are respectively connected to the inner walls of both sides of the support cover. The first adjusting component drives the first clamping plate and the second clamping plate to move towards each other. The second adjusting component provides guidance for the first clamping plate and the second clamping plate. The lifting plate is slidably mounted on the support cover via a guide post. A fourth cylinder connected to the top end of the lifting plate is installed on the support cover. An inkjet head is also provided at the bottom of the lifting plate corresponding to each placement slot.

[0012] According to one embodiment of the present invention, the first adjusting assembly includes a first housing, a coupling is provided inside the first housing, a first symmetrical screw and a second symmetrical screw are respectively provided on both sides of the coupling, the first symmetrical screw and the second symmetrical screw are connected by the coupling, a second motor is provided at one end of the first housing and fixedly connected to the second symmetrical screw, two first movable blocks are symmetrically arranged on each of the first symmetrical screws, two second movable blocks are symmetrically arranged on the second symmetrical screw, each of the first movable block and the second movable block is connected to a first clamping plate and a second clamping plate, a first guide rod is provided inside the first housing and slidably connected to the first movable block and the second movable block, the second adjusting assembly includes a second housing, a third movable block corresponding to the first clamping plate and the second clamping plate is provided inside the second housing, and a second guide rod is fixedly connected inside the second housing and slidably connected to each of the third movable blocks.

[0013] This invention also provides a detection method, the specific steps of which are as follows: S1, placing any of the material seats on the first table of the first workstation, and adapting and connecting the slider at the bottom of the material seat to the slide rail assembly, installing the valve stem in the placement groove on the upper part of the material rack, and then placing the material rack with the valve stem on the material seat, with the positioning post at the bottom of the material rack aligned with the slot on the material seat to complete the positioning and installation of the material rack on the material seat; S2, performing the cleaning operation of the valve stem; S2, starting the third motor to drive the belt to rotate, the pusher on the belt pushes the material rack on the material seat forward along the first slide rail and the second slide rail, when the material rack is moved above the second table of the second workstation, turning off the third motor so that the material rack stops on the second table through the material seat, starting the first lifting assembly to lower the second table into the second platform, the material seat and material rack on the second table are lowered into the cleaning agent in the second platform until the material rack is completely immersed, starting the ultrasonic generator to clean the valve stem installed on the material rack on the second platform, and cleaning is completed. Then, the first lifting assembly is activated again to lift the second platform until the second slide rail on the second platform is flush with the first and fifth slide rails on both sides of the second slide rail, thus completing the cleaning operation of the valve stem. Then, step S3 is executed to perform the coloring operation of the valve stem. In step S3, the third motor is activated to drive the belt, and the pusher on the belt pushes the material rack remaining on the second platform to continue moving forward along the third and fifth slide rails. When the material rack is moved above the third platform where the third workstation is located, the third motor is turned off, allowing the material rack to pass through... The material holder rests on the third platform. The second lifting assembly is activated to lower the third platform into the third platform. The material holder and material rack resting on the third platform are lowered to the valve stem and immersed in the colorant in the third platform. After the first station 1 to the belt is left to stand for 5 minutes, the second lifting assembly is activated again to raise the third platform until the third slide rail on the third platform is flush with the fifth and sixth slide rails on both sides of the third slide rail, so as to complete the coloring operation of the valve stem. S4 is executed to perform the detection operation of the valve stem crack.S4, start the third motor to drive the belt to rotate. The pusher on the belt pushes the material rack, which is currently on the third platform, to continue moving forward along the fourth and sixth slide rails. When the material rack is moved above the fourth platform where the fourth workstation is located, turn off the third motor so that the material rack stops on the fourth platform via the material seat. Start the fourth motor to drive the lead screw to rotate. Through the cooperation of the lead screw and the nut block fixed at the bottom of the fourth platform, the guide block at the bottom of the fourth platform moves along the guide rail. When the fourth platform moves below the auxiliary detection component, start the third cylinder to drive the auxiliary detection component to descend and lock the auxiliary detection component onto the top of the material rack. At this time, the first adjustment component and the second adjustment component are located on both sides of the material rack. The first clamping plate and the second clamping plate are pressed against the top surface of the material rack. The first clamping plate and the second clamping plate of each group are located on both sides of any group of valve stem heads on the material rack. Start the coupling to drive the first symmetrical screw to rotate. The first symmetrical screw drives the corresponding first clamping plate and the second clamping plate to move towards each other so that the rollers on the first clamping plate and the second clamping plate clamp together. The valve stem head is activated. The fourth cylinder pushes the lifting plate downward, so that the friction disc presses against the top surface of each valve stem head. Then, the first motor is activated to drive the friction disc to rotate. The friction force causes each valve stem in contact with the friction disc to rotate. At this time, the industrial cameras installed on both sides of the auxiliary detection component visually inspect the colored cracks on the valve stem. The printhead of the inkjet module marks the valve stem with cracks. The coupling is activated to move the first clamping plate and the second clamping plate in opposite directions so that the rollers on the first clamping plate and the second clamping plate release the valve stem head. Then, the third cylinder is activated to lift the auxiliary detection component. The auxiliary detection component is moved away from the top of the material rack. The fourth motor is activated again to move the fourth platform until the fourth slide rail on the fourth platform is flush with the sixth and seventh slide rails on both sides of the fourth slide rail, completing the detection operation of the valve stem crack. S5, the third motor is activated to drive the belt to rotate. The pusher on the belt pushes the material rack that is stopped on the fourth platform to move forward along the seventh slide rail to unload the material. ;

[0014] According to one embodiment of the present invention, in step S1, material racks can be continuously placed at the first station. When the previous material seat with the material rack installed enters the second station, a new material rack is installed on the new material seat and waits to enter the second station. This step is repeated to form a continuous detection production line.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. In this solution, the valve stem is automatically transferred between multiple stations through a slide rail assembly, material holder, and material rack, improving inspection efficiency. The two middle stations are equipped with cleaning agent and colorant, respectively, which can effectively clean the valve stem surface and highlight cracks. The fourth station includes an auxiliary inspection component that can drive the valve stem on the material rack to rotate, thereby inspecting cracks on the valve stem surface from all angles. At the same time, an industrial camera mounted on a bracket on the support platform can capture images of the valve stem surface and automatically detect cracks through image recognition technology.

[0016] 2. In this solution, the slide rail assembly includes a first slide rail, a second slide rail, a third slide rail, a fourth slide rail, and a fifth slide rail, a sixth slide rail, and a seventh slide rail connecting the slide rails, enabling smooth and accurate movement of the material holder between the four workstations. The fifth, sixth, and seventh slide rails effectively smooth the gaps between the second, third, and fourth slide rails.

[0017] 3. In this solution, through automated process design, the entire inspection process, from valve stem loading, cleaning, and coloring to crack detection, achieves a high degree of automation, significantly reducing manual operation steps and thus improving inspection efficiency. Utilizing ultrasonic cleaning and colorant impregnation technology, dirt on the valve stem surface can be effectively cleaned, and cracks in the valve stem section can be clearly displayed, providing a good foundation for subsequent visual inspection. Furthermore, visual inspection of the valve stem section is performed using an industrial camera, and combined with an inkjet module to mark valve stems with cracks. This not only improves the accuracy of inspection but also enables rapid location and marking of problematic valve stems, facilitating subsequent processing and analysis. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the detection device from a first-view perspective in this embodiment; Figure 2 This is a structural diagram of the detection device from a second perspective in this embodiment; Figure 3 This is an example. Figure 2 Top view; Figure 4 This is an exploded structural diagram of the material rack and material seat in this embodiment; Figure 5 This is a partial structural diagram of the detection device in this embodiment; Figure 6 This is a structural diagram of the second workstation in this embodiment; Figure 7 This is a structural diagram of the third workstation in this embodiment; Figure 8 This is a partial structural diagram of the first lifting component in this embodiment; Figure 9This is a schematic diagram of the operation of the first lifting component at the second workstation in this embodiment; Figure 10 This is a structural diagram of the fourth workstation in this embodiment; Figure 11 This is a structural diagram of the auxiliary detection component from a first-view perspective in this embodiment; Figure 12 This is a structural diagram of the auxiliary detection component from a second perspective in this embodiment; Figure 13 This is a cross-sectional view of the first adjustment component in this embodiment; Figure 14 This is a cross-sectional view of the second adjustment component in this embodiment.

[0019] Reference numerals: 1. First station; 101. First platform; 102. First tabletop; 2. Second station; 201. Second platform; 202. Second tabletop; 203. First lifting assembly; 2031. First lifting arm; 2032. First guide column; 2033. First top plate; 2034. First cylinder; 3. Third station; 301. Third platform; 302. Third tabletop; 303. Second lifting assembly; 3031. Second lifting arm; 3032. Second guide column; 3033. 1. Second top plate; 3034. Second cylinder; 4. Fourth station; 401. Fourth platform; 4011. Guide rail; 402. Fourth table surface; 4021. Guide block; 403. Support platform; 404. Third cylinder; 4041. Connecting plate; 405. Auxiliary detection component; 4051. Support cover; 4052. Lifting plate; 40521. Guide column; 4053. First motor; 40531. Friction disc; 4054. Fourth cylinder; 4055. First clamping plate; 40 56. Second clamping plate; 4057. First adjusting assembly; 40571. First housing; 40572. First movable block; 40573. First symmetrical screw; 40574. Second movable block; 40575. Second symmetrical screw; 40576. Coupling; 40577. Second motor; 40578. First guide rod; 4058. Second adjusting assembly; 40581. Second housing; 40582. Third movable block; 40583. Second guide rod; 4059. 5. Roller; 6. Belt; 7. Push block; 8. Slide rail assembly; 701. First slide rail; 702. Second slide rail; 703. Third slide rail; 704. Fourth slide rail; 705. Fifth slide rail; 706. Sixth slide rail; 707. Seventh slide rail; 8. Material holder; 801. Slider; 802. Slot; 9. Material rack; 901. Placement slot; 902. Positioning post; 10. Bracket; 11. Industrial camera; 12. Third motor; 13. Fourth motor; 14. Lead screw; 15. Valve rod. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, this embodiment provides a device for detecting cracks in the valve stem 15 of an internal combustion engine. The device includes a slide rail assembly 7, a material holder 8, a material rack 9, and four workstations to achieve efficient and automated detection of the valve stem 15. The material holder 8 is slidably mounted on the slide rail assembly 7, and the material rack 9 is mounted on the material holder 8 with open sides for easy operation and observation. The four workstations are arranged sequentially, each equipped with a work surface. These work surfaces are connected by the slide rail assembly 7, ensuring smooth movement of the valve stem 15 during the detection process. Furthermore, the equipment includes a slide rail assembly 7, a material base 8, and a material rack 9. The material base 8 is slidably mounted on the slide rail assembly 7, and the material rack 9 is mounted on the material base 8 with openings along both sides of the slide rail assembly 7. Four workstations are also provided sequentially, each with a platform. The slide rail assembly 7 passes through and connects these platforms. When all platforms are at the same height and aligned, the slide rail assembly 7 is connected. The two middle workstations each have a platform and a lifting assembly that drives the respective platform to rise or fall. The first platform is filled with cleaning agent, and the second platform is filled with... The final station for the colorant is the fourth station 4. The table surface of the fourth station 4 is slidably arranged along the vertical direction of the slide rail assembly 7. The fourth station 4 includes an auxiliary detection assembly 405. Support platforms 403 and third cylinders 404 are provided on both sides of the sliding track of the fourth table surface 402. The auxiliary detection assembly 405 is connected to the top of the third cylinder 404. The auxiliary detection assembly 405 is used to drive the valve rod 15 on the material rack 9 to rotate. An industrial camera 11 is installed on the support platform 403 through the bracket 10. The industrial camera 11 is set open towards both sides of the material rack 9.

[0022] like Figure 2 and 3As shown, the four workstations are designated as workstation 1, workstation 2, workstation 3, and workstation 4. A power assembly for driving the material holder 8 to move along the slide rail assembly 7 is also provided between the four workstations. Workstation 1 has a first platform 101 and a first table 102, with the first table 102 mounted on the first platform 101. Workstation 2 has a second table 202, workstation 3 has a third table 302, and workstation 4 has a fourth platform 401 and a fourth table 402. A guide rail 4011 is provided on the top of the fourth platform 401 in a direction perpendicular to the slide rail assembly 7. A guide block 4021 adapted to the guide rail 4011 is connected to the bottom of the fourth table 402. A lead screw 14 is also installed on the top of the fourth platform 401, located between two guide rails 4011. A fourth motor 13 connected to the lead screw 14 is mounted on the fourth platform 401. The lower end face of the fourth platform 402 is connected to a nut block adapted to the lead screw 14. The second station 2 also includes a second platform 201 and a first lifting assembly 203. The second platform 202 is mounted on the second platform 201 through the first lifting assembly 203 so that the first lifting assembly 203 can drive the second platform 202 to enter or leave the second platform 201. The third station 3 also includes a third platform 301 and a second lifting assembly 303. The third platform 302 is mounted on the third platform 301 through the second lifting assembly 303 so that the second lifting assembly 303 can drive the third platform 302 to enter or leave the third platform 301. Both the second platform 201 and the third platform 301 are provided with chambers. The chamber of the second platform 201 is used to contain cleaning agent. The chamber of the second platform 201 is also provided with an ultrasonic generator. The chamber of the third platform 301 is used to contain coloring agent.

[0023] like Figure 5As shown, the slide rail assembly 7 in this embodiment includes a first slide rail 701, a second slide rail 702, a third slide rail 703, and a fourth slide rail 704. The first slide rail 701 is mounted on the first platform 102, the second slide rail 702 is mounted on the second platform 202, the third slide rail 703 is mounted on the third platform 302, and the fourth slide rail 704 is mounted on the fourth platform 402. A fifth slide rail 705 is provided between the second slide rail 702 and the third slide rail 703, and the fifth slide rail 705 is mounted between the second platform 201 and the third platform 301. At the connection point, a sixth slide rail 706 is provided between the third slide rail 703 and the fourth slide rail 704. The sixth slide rail 706 is installed at the connection point between the third platform 301 and the fourth platform 401. A seventh slide rail 707 is also provided at the end of the fourth slide rail 704 away from the sixth slide rail 706. The seventh slide rail 707 is installed on a support platform 403 on one side. The fifth slide rail 705, the sixth slide rail 706, and the seventh slide rail 707 are used to smoothly transition the gaps between the second slide rail 702, the third slide rail 703, and the fourth slide rail 704. The slide rail assembly 7 ensures the stability and smoothness of the material seat 8 during movement. The first slide rail 701 to the fourth slide rail 704 correspond to the four workstations respectively, providing guidance for the linear movement of the material seat 8. The design of the fifth slide rail 705, the sixth slide rail 706, and the seventh slide rail 707 cleverly solves the problem of gaps that may exist between the slide rails, so that the material holder 8 can be seamlessly connected when moving from one station to another, avoiding shaking or jamming caused by gaps.

[0024] like Figure 4 As shown, in this embodiment, the bottom end of the material holder 8 is provided with a slider 801 connected to the slide rail assembly 7. The material holder 8 has a slot 802, and the material rack 9 has a placement groove 901 for placing the valve stem 15. The bottom of the material rack 9 has a positioning post 902 corresponding to the slot 802. The material holder 8 is tightly connected to the slide rail assembly 7 via the slider 801 at its bottom end, ensuring stable movement of the material holder 8 on the slide rail. The design of the slot 802 allows the material rack 9 to be securely installed on the material holder 8, preventing it from easily falling off.

[0025] Next, as Figure 6 and Figure 8 As shown, the first lifting assembly 203 of this embodiment includes a first lifting arm 2031, a first guide column 2032, a first top plate 2033, and a first cylinder 2034. The first lifting arm 2031 and the first top plate 2033 are respectively connected to the two ends of the first guide column 2032. The first guide column 2032 is vertically slidably mounted on the top of the second platform 201. The first lifting arm 2031 is fixedly connected to the bottom of the second platform 202. The first cylinder 2034 is vertically mounted on the top surface of the second platform 201. The first lifting assembly 203 and the second lifting assembly 303 have the same structure. Therefore... Figure 7 Combination Figure 8As shown, the second lifting assembly 303 includes a second lifting arm 3031, a second guide column 3032, a second top plate 3033, and a second cylinder 3034. The second lifting arm 3031 and the second top plate 3033 are respectively connected to the two ends of the second guide column 3032. The second guide column 3032 is vertically slidably mounted on the top of the third platform 301. The second lifting arm 3031 is fixedly connected to the bottom of the third platform 302. The second cylinder 3034 is vertically mounted on the top surface of the third platform 301. Figure 9 As shown, when the piston rod of the first cylinder 2034 extends, the first top plate 2033 drives the material seat 8 to rise. When the piston rod of the first cylinder 2034 retracts, the first top plate 2033 drives the material seat 8 to fall, so that the valve rod 15 is immersed in the cleaning agent. The working principle of the second lifting assembly 303 is the same as that of the first lifting assembly 203. The extension and retraction movement of the second cylinder 3034 drives the second top plate 3033 and the second guide column 3032 connected thereto to move vertically up and down, so that the valve rod 15 is immersed in the colorant, thereby controlling the lifting and lowering of the other material seat 8.

[0026] For example Figure 5 As shown, the power assembly includes a belt 5 and push blocks 6. The belt 5 has pulleys at both ends. One pulley of the belt 5 is fixed to the upper surface of the first platform 101 by a mounting seat, and the other pulley is fixed to the upper surface of the support platform 403 by a mounting seat. A third motor 12 for driving the pulley at the other end is installed on the support platform 403. The belt 5 is located on one side of the slide rail assembly 7. The push blocks 6 are evenly arranged on the belt 5. The lower belt body of the belt 5 is lower than the lower surface of the material seat 8, and the upper belt body of the belt 5 is higher than the upper surface of the material seat 8.

[0027] like Figures 10 to 14As shown, the auxiliary detection component 405 in this embodiment includes a support cover 4051, a first clamping plate 4055, and a second clamping plate 4056. A connecting plate 4041 is connected to the top of two adjacent third cylinders 404. The top of the support cover 4051 is fixedly connected to the connecting plate 4041. The support cover 4051 has a U-shaped structure with its opening facing downwards. A lifting plate 4052 is provided inside the support cover 4051. A first motor 4053 corresponding to the placement slot 901 is provided at the bottom of the lifting plate 4052. A friction disc 40531 is connected to the output end of the first motor 4053. The first clamping plate 4055 and the second clamping plate 4056 are symmetrically arranged on both sides of the first motor 4053, which is arranged in a straight line. Rollers 4059 are rotatably provided at the ends of the first clamping plate 4055 and the second clamping plate 4056 that are close to each other. The first adjustment component 4057 and the second adjustment component 4058 are respectively connected to the inner walls of both sides of the support cover 4051. The first adjustment component 4057 drives the first clamping plate 4055 and the second clamping plate 4056 to move towards each other. The second adjustment component 4058 provides guidance for the first clamping plate 4055 and the second clamping plate 4056. The lifting plate 4052 is slidably mounted on the support cover 4051 through the guide post 40521. A fourth cylinder 4054 connected to the top of the lifting plate 4052 is installed on the support cover 4051. An inkjet head is also provided at the bottom of the lifting plate 4052 corresponding to each placement slot 901.

[0028] like Figure 13 As shown, the first adjustment assembly 4057 includes a first housing 40571, a coupling 40576 is provided inside the first housing 40571, and a first symmetrical screw 40573 and a second symmetrical screw 40575 are respectively provided on both sides of the coupling 40576. The first symmetrical screw 40573 and the second symmetrical screw 40575 are linked together by the coupling 40576. A second motor 4 is fixedly connected to the second symmetrical screw 40575 at one end of the first housing 40571. 0577, two first movable blocks 40572 are symmetrically arranged on the first symmetrical screw 40573, and two second movable blocks 40574 are symmetrically arranged on the second symmetrical screw 40575. Each of the first movable blocks 40572 and the second movable blocks 40574 is connected to a first clamping plate 4055 and a second clamping plate 4056. The first box body 40571 is provided with a first guide rod 40578 that is slidably connected to the first movable blocks 40572 and the second movable blocks 40574.

[0029] like Figure 14 As shown, the second adjustment component 4058 includes a second housing 40581. The second housing 40581 is provided with a third movable block 40582 corresponding to the first clamping plate 4055 and the second clamping plate 4056. A second guide rod 40583 is also fixedly connected inside the second housing 40581. The second guide rod 40583 is slidably connected to each of the third movable blocks 40582.

[0030] It can be seen that through the coordinated action of the first adjusting component 4057 and the second adjusting component 4058, precise control and stable guidance of the first clamping plate 4055 and the second clamping plate 4056 are achieved. The second motor 40577 drives the second symmetrical screw 40575 to rotate. Since the first symmetrical screw 40573 and the second symmetrical screw 40575 are linked through the coupling 40576, the first symmetrical screw 40573 will also rotate synchronously. In this way, the first movable block 40572 and the second movable block 40574 will slide along the first guide rod 40578 under the drive of the first symmetrical screw 40573 and the second symmetrical screw 40575, thereby driving the first clamping plate 4055 and the second clamping plate 4056 to move towards or away from each other, realizing the clamping or releasing of the valve stem 15. Meanwhile, the third movable block 40582 in the second adjustment assembly 4058 is fixedly connected to the first clamping plate 4055 and the second clamping plate 4056. Through the guiding action of the second guide rod 40583, the stability of the first clamping plate 4055 and the second clamping plate 4056 during the movement is further enhanced, ensuring the accuracy and safety of the valve stem 15 during the testing process.

[0031] The present invention also provides a detection method, the specific steps of which are as follows: S1, place any material holder 8 on the first table 102 where the first work station 1 is located, and adapt and connect the slider 801 at the bottom of the material holder 8 to the slide rail assembly 7, install the valve stem 15 in the placement groove 901 on the upper part of the material rack 9, and then place the material rack 9 with the valve stem 15 on the material holder 8, and align the positioning post 902 at the bottom of the material rack 9 with the slot 802 on the material holder 8 to complete the positioning and installation of the material rack 9 on the material holder 8; S2, perform the cleaning operation of the valve stem 15; S2, start the third motor 12 to drive the belt 5 to rotate, and the pusher 6 on the belt 5 pushes the material... The material rack 9 on seat 8 moves along the first slide rail 701 and the second slide rail 702. When the material rack 9 is moved above the second platform 202 where the second work station 2 is located, the third motor 12 is turned off, allowing the material rack 9 to stop on the second platform 202 via the material seat 8. The first lifting assembly 203 is activated to lower the second platform 202 into the second platform 201. The material seat 8 and material rack 9 on the second platform 202 are immersed in cleaning agent until the material rack 9 is completely submerged in the second platform 201. The ultrasonic generator is activated to clean the valve stem 15 installed on the material rack 9 in the second platform 201. After cleaning, the first lifting assembly 203 is activated again. The lowering component 203 lifts the second table 202 until the second slide rail 702 on the second table 202 is flush with the first slide rail 701 and the fifth slide rail 705 on both sides of the second slide rail 702, so as to complete the cleaning operation of the valve stem 15. Then, S3 is executed to perform the coloring operation of the valve stem 15. In S3, the third motor 12 is started to drive the belt 5 to rotate. The pusher 6 on the belt 5 pushes the material rack 9, which is stationary on the second table 202, to continue moving forward along the third slide rail 703 and the fifth slide rail 705. When the material rack 9 is moved above the third table 302 where the third station 3 is located, the third motor 12 is turned off to allow the material rack 9 to pass through the material rack. The seat 8 rests on the third platform 302. The second lifting assembly 303 is activated to lower the third platform 302 into the third platform 301. The material seat 8 and material rack 9 resting on the third platform 302 are immersed in the colorant in the third platform 301 by the rod part of the valve stem 15. After standing for 1 to 5 minutes, the second lifting assembly 303 is activated again to lift the third platform 302 until the third slide rail 703 on the third platform 302 is flush with the fifth slide rail 705 and the sixth slide rail 706 on both sides of the third slide rail 703, so as to complete the coloring operation of the rod part of the valve stem 15. S4 is executed to perform the crack detection operation of the rod part of the valve stem 15.S4, the third motor 12 is started to drive the belt 5 to rotate. The pusher 6 on the belt 5 pushes the material rack 9, which is stopped on the third table 302, to continue moving forward along the fourth slide rail 704 and the sixth slide rail 706. When the material rack 9 is moved above the fourth table 402 where the fourth station 4 is located, the third motor 12 is turned off, so that the material rack 9 stops on the fourth table 402 via the material seat 8. The fourth motor 13 is started to drive the lead screw 14 to rotate. Through the cooperation of the lead screw 14 and the nut block fixed at the bottom of the fourth table 402, the guide block 4021 at the bottom of the fourth table 402 is driven to move along the guide rail 4011. When the fourth table 402 moves to the bottom of the auxiliary detection component 405, the third motor 12 is started. Cylinder 404 drives the auxiliary detection component 405 to descend, causing it to lock onto the top of the material rack 9. At this time, the first adjustment component 4057 and the second adjustment component 4058 are located on both sides of the material rack 9, and the first clamping plate 4055 and the second clamping plate 4056 are pressed against the top surface of the material rack 9. The first clamping plate 4055 and the second clamping plate 4056 of each group are located on both sides of the head of any group of valve stems 15 on the material rack 9. The actuation coupling 40576 drives the first symmetrical screw 40573 to rotate. The first symmetrical screw 40573 drives the corresponding first clamping plate 4055 and the second clamping plate 4056 to move towards each other, so that the first clamping plate 4055 and the second clamping plate 4056 can move towards each other. Roller 4059 clamps the head of valve stem 15. The fourth cylinder 4054 is activated to push the lifting plate 4052 downwards, causing the friction disc 40531 to press against the top surface of each valve stem 15 head. Then, the first motor 4053 is activated to rotate the friction disc 40531. Friction causes each valve stem 15 in contact with the friction disc 40531 to rotate. At this time, industrial cameras 11 mounted on both sides of the auxiliary detection component 405 visually inspect the colored cracks on the valve stem 15. The printhead of the inkjet module marks the valve stems 15 with cracks. The coupling 40576 is activated to move the first clamping plate 4055 and the second clamping plate 4056 in opposite directions, so that… S5. Rollers 4059 on the first clamping plate 4055 and the second clamping plate 4056 release the head of the valve stem 15. Then, the third cylinder 404 is activated to lift the auxiliary detection component 405. The auxiliary detection component 405 is moved away from the top of the material rack 9. The fourth motor 13 is activated again to move the fourth table 402 until the fourth slide rail 704 on the fourth table 402 is flush with the sixth slide rail 706 and the seventh slide rail 707 on both sides of the fourth slide rail 704, completing the detection operation of the valve stem 15 crack. S6. The third motor 12 is activated to drive the belt 5 to rotate. The pusher 6 on the belt 5 pushes the material rack 9, which is stationary on the fourth table 402, to move forward along the seventh slide rail 707 to unload the material.

[0032] In this embodiment, through automated process design, the entire inspection process, from loading, cleaning, and coloring of the valve stem 15 to crack detection, is highly automated, greatly reducing manual operation steps and thus improving inspection efficiency. Using ultrasonic cleaning and colorant impregnation technology, dirt on the surface of the valve stem 15 can be effectively cleaned, and cracks in the valve stem 15 can be clearly displayed, providing a good foundation for subsequent visual inspection. Furthermore, visual inspection of the valve stem 15 is performed using an industrial camera 11, and valve stems with cracks are marked using an inkjet module. This not only improves the accuracy of inspection but also allows for rapid location and marking of problematic valve stems 15, facilitating subsequent processing and analysis.

[0033] Furthermore, in step S1, material racks 9 can be continuously placed on the first station 1. When the previous material seat 8 with a material rack 9 installed enters the second station 2, a new material rack 9 is installed on the new material seat 8 and waits to enter the second station 2. This step is repeated to form a continuous inspection production line. In this way, the entire inspection equipment can continuously inspect the valve stem 15, further improving the inspection efficiency.

[0034] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A valve stem crack detection device for an internal combustion engine, comprising a slide rail assembly (7), a material holder (8), and a material rack (9), characterized in that, The material seat (8) is slidably mounted on the slide rail assembly (7), and the material rack (9) is installed on the material seat (8) with open sides; the equipment has four workstations in sequence, each workstation has a table, and the slide rail assembly (7) passes through and connects the table; when the table is at the same height and level, the slide rail assembly (7) is connected; the two middle workstations are equipped with platforms and lifting components to drive the table to rise and fall, the front platform is injected with cleaning agent, and the rear platform is injected with colorant; the last position is the fourth workstation (4), whose table slides vertically along the slide rail assembly (7); the fourth workstation (4) includes an auxiliary detection component (405), and a support platform (403) and a third cylinder (404) are provided on both sides of the table sliding track. The auxiliary detection component (405) is connected to the top of the third cylinder (404) to drive the valve rod (15) on the material rack (9) to rotate; an industrial camera (11) is installed on the support platform (403) through a bracket (10), and the industrial camera (11) is set facing the open side of the material rack (9).

2. The internal combustion engine valve stem crack detection device according to claim 1, characterized in that, The four workstations are designated as Workstation 1 (1), Workstation 2 (2), Workstation 3 (3), and Workstation 4 (4); Workstation 1 (1): includes a first platform (101) and a first tabletop (102) mounted thereon; Workstation 2 (2): includes a second platform (201), a first lifting assembly (203), and a second tabletop (202), the second tabletop (202) being lifted and lowered by the first lifting assembly (203) to enter and exit the second platform (201); Workstation 3 (3): includes a third platform (301), a second lifting assembly (303), and a third tabletop (302), the third tabletop (302) being lifted and lowered by the second lifting assembly (203) to enter and exit the second platform (201); The component (303) is raised and lowered to enter and exit the third platform (301); the fourth station (4): is equipped with a fourth platform (401), a guide rail (4011), a fourth motor (13) and a lead screw (14). The bottom of the fourth table (402) is slidably connected to the guide rail (4011) through a guide block (4021) and is engaged with the lead screw (14) through a nut block. It is driven to move laterally by the fourth motor (13); the power component drives the material seat (8) to move between stations along the slide rail assembly (7); in the fourth station, the guide rail (4011) is arranged perpendicular to the slide rail assembly (7), and the lead screw (14) is located between the guide rails and connected to the fourth motor (13).

3. The internal combustion engine valve stem crack detection device according to claim 2, characterized in that, The slide rail assembly (7) includes a first slide rail (701), a second slide rail (702), a third slide rail (703), and a fourth slide rail (704). The first slide rail (701) is mounted on the first platform (102), the second slide rail (702) is mounted on the second platform (202), the third slide rail (703) is mounted on the third platform (302), and the fourth slide rail (704) is mounted on the fourth platform (402). A fifth slide rail (705) is provided between the second slide rail (702) and the third slide rail (703), and is mounted on the second platform (201) and the third platform (402). 301) Connection point; A sixth slide rail (706) is provided between the third slide rail (703) and the fourth slide rail (704), and is installed at the connection point between the third platform (301) and the fourth platform (401); A seventh slide rail (707) is also provided at the end of the fourth slide rail (704) away from the sixth slide rail (706), and is installed on the support platform (403); The fifth slide rail (705), the sixth slide rail (706) and the seventh slide rail (707) are used to smoothly transition the gap between the second slide rail (702), the third slide rail (703) and the fourth slide rail (704).

4. The internal combustion engine valve stem crack detection device according to claim 1, characterized in that, The bottom end of the material seat (8) is provided with a slider (801) connected to the slide rail assembly (7). The material seat (8) is provided with a slot (802). The material rack (9) is provided with a placement slot (901) for placing the valve stem (15). The bottom of the material rack (9) is provided with a positioning post (902) corresponding to the slot (802).

5. A valve stem crack detection device for an internal combustion engine according to claim 2 or 3, characterized in that, The first lifting assembly (203) includes a first lifting arm (2031), a first guide column (2032), a first top plate (2033), and a first cylinder (2034). The first lifting arm (2031) and the first top plate (2033) are respectively connected to the two ends of the first guide column (2032). The first guide column (2032) is vertically slidably mounted on the top of the second platform (201). The first lifting arm (2031) is fixedly connected to the bottom of the second platform (202). The first cylinder (2034) is vertically mounted on the top surface of the second platform (201). The second lifting assembly (303) includes a second lifting arm (3031), a second guide column (3032), a second top plate (3033), and a second cylinder (3034). The second lifting arm (3031) and the second top plate (3033) are respectively connected to the two ends of the second guide column (3032). The second guide column (3032) is vertically slidably installed on the top of the third platform (301). The second lifting arm (3031) is fixedly connected to the bottom of the third platform (302). The second cylinder (3034) is vertically installed on the top surface of the third platform (301).

6. The internal combustion engine valve stem crack detection device according to claim 5, characterized in that, The power assembly includes a belt (5) and push blocks (6). The belt (5) has pulleys at both ends. One pulley of the belt (5) is fixed to the upper surface of the first platform (101) by a mounting seat, and the other pulley is fixed to the upper surface of the support platform (403) by a mounting seat. A third motor (12) for driving the pulley at the other end is installed on the support platform (403). The belt (5) is located on one side of the slide rail assembly (7). The push blocks (6) are evenly arranged on the belt (5). The lower belt body of the belt (5) is set below the lower surface of the material seat (8), and the upper belt body of the belt (5) is set above the upper surface of the material seat (8).

7. The internal combustion engine valve stem crack detection device according to claim 1 or 2, characterized in that: The auxiliary detection component (405) includes a support cover (4051), a first clamping plate (4055), a second clamping plate (4056), and a connecting plate (4041); the connecting plate (4041) is connected to the top of an adjacent third cylinder (404); the support cover (4051) is a U-shaped opening cover, and its top is fixed to the connecting plate (4041); a lifting plate (4052) is provided inside the cover, which is slidably installed on the support cover (4051) through a guide post (40521) and driven by a fourth cylinder (4054); the bottom of the lifting plate (4052) is provided with The first motor (4053) and inkjet head are corresponding to the placement slot (901). The output end of the first motor is provided with a friction disk (40531). The first clamping plate (4055) and the second clamping plate (4056) are symmetrically arranged on both sides of the linearly arranged first motor (4053), and rollers (4059) are rotatably provided at their opposite ends. The inner walls of both sides of the support cover (4051) are provided with a first adjustment component (4057) and a second adjustment component (4058). The first adjustment component (4057) drives the two clamping plates to move towards each other, and the second adjustment component (4058) provides guidance for the clamping plates.

8. The internal combustion engine valve stem crack detection device according to claim 7, characterized in that, The first adjustment assembly (4057) includes a first housing (40571), which contains a coupling (40576), and two symmetrical screws (40573 and 40575) on both sides are connected by the coupling. One end of the housing is provided with a second motor (40577) that is fixedly connected to the second symmetrical screw. Two first movable blocks (40572) are symmetrically arranged on the first symmetrical screw, and two second movable blocks (40574) are symmetrically arranged on the second symmetrical screw. Each movable block is connected to a first clamping plate (4055) or a second clamping plate (4056). The first housing contains a first guide rod (40578) that is slidably connected to the movable blocks. The second adjustment assembly (4058) includes a second housing (40581), which contains a third movable block (40582) corresponding to the clamping plate and a fixedly connected second guide rod (40583). The second guide rod is slidably connected to each third movable block.

9. A method for detecting valve stem cracks in an internal combustion engine, using the valve stem crack detection equipment for an internal combustion engine as described in claim 3, characterized in that... The specific steps are as follows: S1, place the material holder (8) on the first station (1) and install the valve stem (15) on the material rack (9), and complete the positioning of the material rack (9) on the material holder (8) through the positioning structure; execute S2; S2, move the material rack (9) to the second station (2) through the conveying mechanism, immerse the material rack (9) in the cleaning agent using the lifting device, start the ultrasonic generator to clean the valve stem (15), and lift the material rack (9) to the conveying position after cleaning; execute S3; S3, the material rack (9) is moved to the third station (3) by the conveying mechanism, the valve stem (15) is immersed in the colorant for coloring by the lifting device, and after a preset time, the material rack (9) is lifted to the conveying position; S4 is executed. S4, the material rack (9) is moved to the fourth station (4) by the conveying mechanism, the material rack (9) is positioned to the detection position by the moving device, the detection device is started to clamp and rotate the head of the valve stem (15), the crack in the stem is detected by the visual inspection device, and the valve stem (15) with crack is marked by the marking device. After completion, the detection device is removed and the material rack (9) is reset. S5, the material rack (9) is moved to the unloading position by the conveying mechanism for unloading.

10. The method for detecting valve stem cracks in an internal combustion engine according to claim 9, characterized in that, In S1, the first station (1) continuously places the material rack (9); when the material seat (8) enters the second station (2), a new material rack (9) is installed on the new material seat (8) and waits; repeat this step to form a continuous inspection production line.

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