A product inspection apparatus
By using clamping and flipping components in product testing equipment, the problem of workpiece position deviation during clamping is solved, achieving stable lifting and impurity removal, and improving testing accuracy and the stability of optical testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 东科新能(无锡)电子有限公司
- Filing Date
- 2026-06-24
- Publication Date
- 2026-07-21
AI Technical Summary
Existing product testing equipment generates slight impacts or vibrations when the grippers quickly detach from the workpiece during the clamping process, resulting in workpiece position deviations and affecting testing accuracy and optical focusing precision.
The clamping assembly includes a torsion frame, clamping claws, flexible pads, and a top protrusion. Through arc-shaped trajectory movement and flexible contact, it reduces the impact at the moment of clamping, provides stable lifting and positioning, and, combined with a flipping assembly, removes impurities from the workpiece surface, ensuring the stability of optical inspection.
It improves the accuracy of product inspection and the stability of optical inspection, reduces workpiece position deviation and impurity interference, and ensures the accuracy of inspection results.
Smart Images
Figure CN122430342A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of product testing technology, and specifically to a product testing device. Background Technology
[0002] DC contactors are electromagnetic automatic switching devices that rely on electromagnetic principles to achieve circuit switching. They are mainly used in DC power circuits and belong to the category of power electronic components and electrical equipment. The core working principle of this device is to drive the contact mechanism to move by electromagnetic force, thereby realizing the frequent connection, load bearing and circuit disconnection of DC circuits. The overall performance of DC contactors is closely related to new material technologies: its contact system is mostly made of metal materials such as silver alloy and copper alloy, the arc extinguishing device is made of ceramic and insulating composite materials, and the electromagnetic system is equipped with mild steel, industrial pure iron and permanent magnet materials. The performance of the above core components is optimized by the application of various new materials. At the same time, the development of wide bandgap semiconductor materials such as silicon carbide and gallium nitride has also promoted the technological iteration of hybrid and solid-state DC contactors, which can improve the response speed and service durability of the device. In the production and processing of DC contactors, supporting testing equipment is an important facility for controlling the quality of finished products. The conventional testing process is as follows: the workpiece to be inspected is first transported to the designated testing station by the transfer mechanism, then the workpiece is fixed by the clamping and positioning mechanism, and finally the surface image of the workpiece is acquired by the testing device, and appearance defect identification is carried out. Currently, many workpieces are tested by using grippers that close from both sides or around the workpiece to apply radial clamping force to fix its spatial position. However, when the grippers open to release the field of view, they usually adopt a rapid outward swing around the fixed hinge point. This instantaneous disengagement action will produce a non-negligible micro-impact or vibration on the workpiece. The posture of the workpiece on the support surface will therefore be momentarily disturbed, resulting in a deviation between the workpiece position at the time of testing and the position during clamping and positioning. This affects the optical focusing accuracy and image geometric consistency, and reduces the accuracy of product testing. Summary of the Invention
[0003] The purpose of this invention is to provide a product testing device to address the aforementioned shortcomings in the technology.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a product testing device, comprising a testing frame, a workpiece, and a suction device, wherein a station clamping block, a multi-motion transfer frame, and a positioning plate are sequentially installed inside the testing frame, and the station clamping block and the multi-motion transfer frame are used to stably place the workpiece inside the positioning plate, wherein the positioning plate is provided with a clamping assembly, and the clamping assembly is used to apply constant pressure to the workpiece inside the positioning plate while lifting the workpiece during the testing process to observe the changes on the sample surface; The clamping assembly includes several torsion frames installed inside the positioning plate. Each torsion frame has a clamping claw movably connected to one side, and the middle of the clamping claw is curved, and it is vertical from the curve downward. A flexible pad is fixedly connected to the side of the clamping claw near the workpiece. Several top protrusions are installed inside the positioning plate. The positioning plate is provided with a motion component on its exterior, and the motion component is used to drive the torsion frame to move horizontally and in an arc trajectory. The positioning plate is equipped with a synchronous component that pushes several top protrusions to move synchronously upward or downward. The inspection frame is equipped with a flipping component, which is used to flip the workstation clamping block as it moves along the top of the suction device, while providing a stable inspection environment for the optical inspection of auxiliary workpieces.
[0005] Preferably, the motion component includes a displacement groove formed on the outside of the positioning plate and communicating with its interior, and a knob frame hinged to the bottom of the torsion frame. A first electric push rod is fixedly connected to the top of the knob frame, and there is a floating gap between the first electric push rod and the torsion frame. The output end of the first electric actuator is equipped with an abutment roller, and the top of the torsion frame is provided with an arc-shaped groove for guiding the movement of the abutment roller. An electric push rod frame is connected between the positioning plate and the displacement groove. A frame is fixedly connected to the bottom of the knob frame, and the electric push rod frame is used to drive the frame to move left and right. The clamping jaws and the torsion frame are connected by two symmetrical adaptation components.
[0006] Preferably, each of the adaptation components includes a push rod hinged to one side of the clamping claw and a limiting ring frame slidably connected inside the torsion frame, and one end of the push rod passes through the torsion frame and the limiting ring frame in sequence; A second spring is connected between the top rod and the limiting ring frame, and the second spring is used to provide a reaction force to one end of the top rod.
[0007] Preferably, an inner threaded ring is fixedly connected inside the torsion frame, a concentric ring is movably connected to one end of the limiting ring frame, and an outer threaded ring is fixedly connected to the end of the concentric ring near the inner threaded ring, and the outer threaded ring and the inner threaded ring are screwed together. The second spring adjusts its own elastic tension through the outer threaded ring.
[0008] Preferably, the synchronization component includes a rotating disk rotatably connected inside the positioning plate and a lifting column fixedly connected to the bottom end of the top protrusion. The positioning plate has a through hole communicating with its interior. A lifting frame is fixedly connected to the top of the rotating disk. One end of the lifting column passes through the through hole and abuts against the top of the lifting frame. The lifting frame and the lifting column maintain a slope fit. The bottom of the positioning plate is fixedly connected to a first servo motor, and the output end of the first servo motor extends into the interior of the positioning plate and is fixedly connected to the bottom of the rotating disk.
[0009] Preferably, an upper cover ring is fixedly connected inside the through hole, and the upper cover ring is movably sleeved on the outside of the lifting column; a lower cover ring is fixedly sleeved on the bottom of the lifting column, and the lower cover ring is slidably connected inside the through hole. A first spring is connected between the upper cover ring and the lower cover ring, and the first spring is sleeved on the outside of the lifting column. The lifting column is stably in contact with the top of the lifting frame through the first spring.
[0010] Preferably, the flipping assembly includes a support frame fixedly connected to one end of the workstation clamping block and a centering frame fixedly connected to the side of the inspection frame near the workstation clamping block. The top of the centering frame is provided with a second sliding groove, and one side of the centering frame is provided with a first sliding groove that communicates with the interior of the second sliding groove. The first sliding groove and the second sliding groove together form a C-shaped structure. A sliding plate is slidably connected to one side of the centering frame, and a concentric horizontal column is installed on one side of the centering frame. One end of the concentric horizontal column passes through the first sliding groove and the sliding plate in sequence and is connected to one side of the support frame. A gear is sleeved on the end of the concentric horizontal column located outside the first sliding groove. The first and second slides are internally slidably connected by a short-stroke frame, which is designed as an L-shaped structure. The short-stroke frame is sleeved on the outside of the concentric horizontal column on one side of the first slide. A rack is fixedly connected to one side of the centering frame, and the rack meshes with the gear.
[0011] Preferably, a second electric push rod is fixedly connected to the side of the centering frame near the workstation clamping block, the telescopic end of the second electric push rod is fixedly connected to the top of the sliding plate, a horizontal guide rod is fixedly connected to the side of the centering frame near the second electric push rod, and the sliding plate is slidably sleeved on the outside of the horizontal guide rod.
[0012] The technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. This invention, through the arrangement of a positioning plate, clamping claws, a top protrusion, a flexible pad, a torsion frame, and a knob frame, allows the positioning plate to carry the workpiece to the preset detection position. After the positioning plate moves the workpiece to the preset detection position, the clamping claws open along the bottom of the workpiece in a figure-eight arc motion. The claws retract along an arc trajectory. In the initial separation phase, the claws still slide along the bottom arc surface of the workpiece, gradually reducing the lifting force and preventing the two from separating instantly. The top protrusion pushes the workpiece upward, lifting the bottom of the workpiece away from the claw tip position. The workpiece is in a low-obstruction suspended support state at the detection station. The optical detection equipment can completely capture the bottom image of the workpiece, ensuring smooth detection optical path and helping to maintain the operating rhythm of continuous detection operations. 2. This invention utilizes the clamping claw, flexible pad, and workpiece configuration. The clamping claw employs a composite structure combining arc and vertical elements. In the initial stage of clamping, the arc segment wraps around the bottom curved surface of the workpiece in a surface contact manner, bearing the weight of the workpiece and achieving horizontal centering. The vertical segment adheres to the bottom of the workpiece's side wall, providing vertical limiting force to reduce workpiece tipping and displacement. The two segments respectively undertake the functions of bottom support and lateral protection, decomposing the single clamping force into two types of directional constraints. While ensuring support stability, it is not necessary to apply a large radial clamping force, resulting in a stable workpiece posture during transport and minimizing swaying and tilting. 3. The present invention, through the arrangement of the contact roller, the arc groove, the torsion frame, the clamping claw, the flexible pad, and the workpiece, enables the clamping claw to move in an arc shape to maintain a small amount of over-push margin. After the clamping claw has attached to the component, the contact roller can still advance a small distance along the inside of the arc groove. This over-push is absorbed by the elastic deformation of the flexible pad and converted into an eliminating torque on each hinge gap of the entire clamping chain, so that the clamping claw and the workpiece are unidirectionally compacted. The spatial position of the workpiece after clamping has a very high repeatability with respect to the positioning plate, providing a stable and consistent initial coordinate for subsequent top protrusion push and optical detection. 4. By adapting the components, flexible pads, clamping claws, torsion frame and knob frame, the present invention allows the clamping claws to move closer to the workpiece. During this process, the force is transmitted to the flexible pads through the claw skeleton. The flexible pads are gradually compressed and deformed along the arc-shaped contact surface, forming a gradient distribution of contact pressure. When there are local protrusions on the workpiece surface, the flexible structure can adaptively retract, while the remaining contact areas remain tightly fitted, reducing local suspension and stress concentration, expanding the effective contact area, and improving the overall clamping stability. 5. The present invention, through the setting of the flipping component, the station clamping block and the suction device, enables the station clamping block to achieve horizontal movement to flipping movement during the movement along the top of the suction device. During the flipping stage, each surface of the workpiece faces downward in sequence. The loose impurities that were originally adsorbed or embedded in the crevices and edges of the workpiece surface lose their original attachment balance due to the continuous change of the gravity direction relative to the workpiece surface. Under the action of the impurities themselves, they fall off the workpiece surface and fall into the dust collection area near the suction device. The suction port of the suction device is located directly below the workpiece's travel path, and a directional airflow sweeps the workpiece surface. The impurities brought by the flipping are already in a loose and absorbable state. The airflow can capture them with a low negative pressure and suck them into the collection chamber, providing stable initial conditions for the subsequent arc clamping of the clamping claw. 6. By setting up the flipping component, the workpiece is moved to the positioning plate by the station clamping block, and the workpiece is moved in a horizontal, flipping and horizontal multi-posture motion in sequence. As the workpiece moves along the top of the suction device, the relative distance between the two changes gradually, and the cleanliness of the workpiece surface gradually increases with the process, which can reduce the interference of impurities on the detection screen and thus improve the accuracy of the workpiece detection results. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.
[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of section A in the image; Figure 3 This is a schematic diagram of the structure of the workstation clamping block of the present invention; Figure 4 This is a schematic diagram of the positioning plate of the present invention; Figure 5 This is an exploded view of the synchronization component of the present invention; Figure 6 This is a schematic diagram of the assembly of the clamping claw and the workpiece according to the present invention; Figure 7 An exploded view of the component adapted to this invention; Figure 8 This is a schematic diagram of the structure of the short-range frame in the first motion state of the present invention; Figure 9 This is a schematic diagram of the second motion state of the short-range frame of the present invention; Figure 10 This is a schematic diagram of the third motion state of the short-range frame of the present invention.
[0015] Explanation of reference numerals in the attached figures: 1. Inspection frame; 11. Station clamping block; 12. Multi-motion transfer frame; 13. Positioning plate; 14. Workpiece; 15. Suction device; 2. Clamping assembly; 21. Clamping claw; 22. Flexible pad; 23. Torsion frame; 24. Top protrusion frame; 3. Motion assembly; 31. Electric push rod frame; 32. Frame; 33. Knob frame; 34. Arc slide groove; 35. Contact roller; 36. First electric push rod; 37. Displacement groove; 4. Synchronization assembly; 41. Rotary disk; 42. Lifting frame; 43. Through hole; 44. Top cover ring ; 45. First spring; 46. Lower cover ring; 47. Lifting column; 48. First servo motor; 5. Adaptation component; 51. Top rod; 52. Second spring; 53. Limiting ring frame; 54. Concentric ring; 55. External threaded ring; 56. Internal threaded ring; 6. Tilting component; 61. Centering frame; 62. Support frame; 63. Sliding plate; 64. First slide groove; 65. Second slide groove; 66. Concentric horizontal column; 67. Gear; 68. Short-stroke frame; 69. Rack; 601. Second electric push rod; 602. Horizontal guide rod. Detailed Implementation
[0016] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.
[0017] This invention provides, for example Figures 1-7 The product testing equipment shown includes a testing frame 1, a workpiece 14, and a suction device 15. The testing frame 1 is equipped with a station clamping block 11, a multi-motion transfer frame 12, and a positioning plate 13 in sequence. The station clamping block 11 and the multi-motion transfer frame 12 are used to stably place the workpiece 14 inside the positioning plate 13. The positioning plate 13 is provided with a clamping assembly 2. The clamping assembly 2 is used to apply a constant pressure to the workpiece 14 inside the positioning plate 13 while lifting the workpiece 14 during the testing process to observe the changes on the sample surface. The clamping assembly 2 includes several torsion frames 23 installed inside the positioning plate 13. Each torsion frame 23 is movably connected to a clamping claw 21 on one side. The middle part of the clamping claw 21 is curved and vertical from the curve downward. A flexible pad 22 is fixedly connected to the side of the clamping claw 21 near the workpiece 14. Several top protrusions 24 are installed inside the positioning plate 13. Three clamping claws 21 are provided, and the three clamping claws 21 are arranged around the inside of the positioning plate 13. The number of top protrusions 24 is consistent with the number of clamping claws 21. The specific structure and operating principle of the detection frame 1, the station clamping block 11, the multi-motion transfer frame 12 and the component suction device 15 are all existing conventional technologies, and will not be described in detail in this application. The current routine testing process for DC contactors is as follows: After the workpiece 14 is transferred to the designated position of the station clamp 11 via the conveyor frame, the clamping structures on both sides of the station clamp 11 synchronously retract towards each other under electric or pneumatic power. The end limit block preferentially fits the side reference surface of the workpiece 14 to correct the skew, offset, and misalignment of the component, so that the component is placed in the clamping center position. Then, the station clamp 11 moves towards the positioning plate 13 by means of the track conveyor. The negative pressure fan inside the suction device 15 starts to operate, forming a low-pressure negative pressure area in the sealed pipeline and suction chamber. The outside of the chamber is kept at normal pressure, and a stable air pressure difference is formed inside and outside the chamber. Under the action of the air pressure difference, the outside air rushes into the negative pressure chamber at high speed, forming a directional high-speed airflow around the workpiece 14, gaps, and corner grooves. When the airflow washes the surface of the workpiece 14, it peels off the attached dust, processing debris, fine lint, residual particles and other impurities from the surface of the component. The cleaned component continues to be transferred to the optical testing station by the conveyor structure. After receiving the unloading command, the multi-motion transfer frame 12 maintains a constant clamping force to firmly constrain the workpiece 14, reducing the possibility of components falling or shifting positions during the transfer process. The lifting column of the clamping frame is activated, driving the clamping components and the entire component to descend vertically and smoothly. The descent speed can be smoothly adjusted to reduce the possibility of damage to the component from high-speed impacts. After the component is clamped, the mechanism retracts backward. The clamping frame, combined with the horizontal slide rail and servo transmission structure, makes a smooth linear displacement in the horizontal direction under power drive. The displacement encoder monitors the movement stroke in real time until the vertical projection of the workpiece 14 is accurately aligned with the placement point on the top surface of the positioning plate 13, completing the horizontal orientation calibration. The mechanism then descends again to place the component smoothly on the preset point of the positioning plate 13. The positioning plate 13 is moved to the detection area by means of the track, ensuring the smooth and stable progress of the detection operation. The positioning plate 13 is provided with a motion component 3 on its exterior, and the motion component 3 is used to drive the torsion frame 23 to move horizontally and in an arc trajectory. The motion component 3 includes a displacement groove 37 that is opened on the exterior of the positioning plate 13 and communicates with its interior, and a knob frame 33 that is hinged to the bottom of the torsion frame 23. A first electric push rod 36 is fixedly connected to the top of the knob frame 33, and there is a floating gap between the first electric push rod 36 and the torsion frame 23. The output end of the first electric actuator 36 is equipped with an abutment roller 35, and the top of the torsion frame 23 is provided with an arc groove 34 for guiding the movement of the abutment roller 35, and the arc groove 34 is designed as an arc shape. An electric push rod frame 31 is connected between the positioning plate 13 and the displacement groove 37. A frame 32 is fixedly connected to the bottom of the knob frame 33, and the electric push rod frame 31 is used to drive the frame 32 to move left and right. Two symmetrical adaptation components 5 are connected between the clamping claw 21 and the torsion frame 23; each adaptation component 5 includes a push rod 51 hinged to one side of the clamping claw 21 and a limiting ring frame 53 slidably connected inside the torsion frame 23, and one end of the push rod 51 passes through the torsion frame 23 and the limiting ring frame 53 in sequence. A second spring 52 is connected between the push rod 51 and the limiting ring frame 53, and the second spring 52 is used to provide a reaction force to one end of the push rod 51; an inner threaded ring 56 is also fixedly connected inside the torsion frame 23, a concentric ring 54 is movably connected to one end of the limiting ring frame 53, and an outer threaded ring 55 is fixedly connected to one end of the concentric ring 54 near the inner threaded ring 56, and the outer threaded ring 55 and the inner threaded ring 56 are kept in a threaded connection; The second spring 52 adjusts its own elastic tension through the outer threaded ring 55; The push rod 51 and the torsion frame 23 are slidably connected. The outer wall of the push rod 51 abuts against the inside of the torsion frame 23 to form a limiting fit. This structure can restrict the range of motion of the push rod 51, so that the push rod 51 can only slide along the inside of the torsion frame 23, while preventing the push rod 51 from coming out of the inside of the torsion frame 23. refer to Figure 3 , Figure 4 and Figure 5 As shown, the positioning plate 13 is provided with a synchronization component 4 that pushes several top protrusions 24 to move synchronously upward or downward. The synchronization component 4 includes a rotating disk 41 rotatably connected inside the positioning plate 13 and a lifting column 47 fixedly connected to the bottom end of the top protrusions 24. The positioning plate 13 is provided with a through hole 43 communicating with its interior. The top end of the rotating disk 41 is fixedly connected to a lifting frame 42. One end of the lifting column 47 passes through the through hole 43 and abuts against the top of the lifting frame 42. The lifting frame 42 and the lifting column 47 maintain a slope fit. The bottom of the positioning plate 13 is fixedly connected to a first servo motor 48, and the output end of the first servo motor 48 extends into the interior of the positioning plate 13 and is fixedly connected to the bottom of the rotating disk 41. An upper cover ring 44 is fixedly connected inside the through hole 43, and the upper cover ring 44 is movably sleeved on the outside of the lifting column 47. A lower cover ring 46 is fixedly sleeved on the bottom of the lifting column 47, and the lower cover ring 46 is slidably connected inside the through hole 43. A first spring 45 is connected between the upper cover ring 44 and the lower cover ring 46, and the first spring 45 is sleeved on the outside of the lifting column 47. The lifting column 47 is stably in contact with the top of the lifting frame 42 through the first spring 45.
[0018] refer to Figure 3 , Figure 8 , Figure 9 and Figure 10 As shown, the inside of the inspection frame 1 is provided with a flipping component 6, which is used to flip the station clamp 11 during the movement of the suction device 15, and at the same time provide a stable inspection environment for the optical inspection of the auxiliary workpiece 14. The flipping component 6 includes a support frame 62 fixedly connected to one end of the station clamp 11 and a centering frame 61 fixedly connected to the side of the inspection frame 1 near the station clamp 11. The top of the centering frame 61 is provided with a second slide groove 65, and one side of the centering frame 61 is provided with a first slide groove 64 that communicates with the inside of the second slide groove 65. The first slide groove 64 and the second slide groove 65 together form a C-shaped structure. A sliding plate 63 is slidably connected to one side of the centering frame 61, and a concentric horizontal column 66 is installed on one side of the centering frame 61. One end of the concentric horizontal column 66 passes through the first sliding groove 64 and the sliding plate 63 in sequence and is connected to one side of the support frame 62. A gear 67 is sleeved on one end of the concentric horizontal column 66 located outside the first sliding groove 64. The first slide groove 64 and the second slide groove 65 are slidably connected to a short-stroke frame 68, which is designed as an L-shaped structure. The short-stroke frame 68 is located on the outside of the first slide groove 64 and is sleeved on the outside of the concentric horizontal column 66. A rack 69 is fixedly connected to one side of the centering frame 61, and the rack 69 meshes with the gear 67. A second electric push rod 601 is fixedly connected to the side of the centering frame 61 near the workstation clamping block 11. The telescopic end of the second electric push rod 601 is fixedly connected to the top of the sliding plate 63. A horizontal guide rod 602 is fixedly connected to the side of the centering frame 61 near the second electric push rod 601, and the sliding plate 63 is slidably sleeved on the outside of the horizontal guide rod 602.
[0019] Working principle: When using: refer to Figure 3 , Figure 8 , Figure 9 and Figure 10 As shown, when performing DC contactor component testing, the area obstructed by the workpiece 14 and the clamping jaw 21 during the testing process is reduced; First, the station clamping block 11 pre-clamps the workpiece 14, removing it from the loading tray. Then, the loading tray moves downwards along the inside of the inspection frame 1, creating a gap between the workpiece 14 and the loading tray. The second electric push rod 601 extends and retracts, causing the sliding plate 63 to move along one side of the centering frame 61 towards the outside of the positioning plate 13. During its movement, the sliding plate 63 is guided by the horizontal guide rod 602, which limits the movement trajectory of the sliding plate 63. Simultaneously, the sliding plate 63 drives the concentric horizontal column 66 and the short-stroke frame 68 to slide along the inside of the first sliding groove 64. The top of the short-stroke frame 68 contacts and slides relative to the inner wall of the first sliding groove 64, thus maintaining the stability of the support frame 62 during movement and allowing the station clamping block 11 to smoothly move towards the suction side along one side of the centering frame 61. As the device 15 moves horizontally, when the short-stroke frame 68 slides out of the first slide groove 64 and enters the second slide groove 65, the short-stroke frame 68 and the second slide groove 65 maintain contact on only one side. The gear 67 and the rack 69 mesh with each other and roll along the top surface of the rack 69. The gear 67 rotates while moving, causing the side of the short-stroke frame 68 that is in contact with the first slide groove 64 to gradually move away from the groove. The other side of the short-stroke frame 68 slowly moves towards the inner wall of the first slide groove 64 under the drive of the gear 67. During this movement, the short-stroke frame 68 completes the posture flipping inside the first slide groove 64 and the second slide groove 65. The concentric horizontal column 66 rotates synchronously and drives the support frame 62 to rotate along one side of the sliding plate 63, so that the station clamp 11 changes from horizontal movement to flipping movement when it moves on top of the suction device 15. refer to Figure 3 , Figure 8 , Figure 9 and Figure 10As shown, the workpiece 14 is rotated synchronously with the station clamp 11, and its surfaces are distributed downwards in sequence. The loose impurities that were originally adsorbed and embedded in the gaps and edges of the workpiece 14 are broken due to the continuous change of their relative gravity direction. Under the action of their own weight, they fall off the surface of the workpiece 14 and fall into the dust collection area around the suction device 15. The suction port of the suction device 15 is set directly below the path of the workpiece 14 and continuously delivers directional sweeping airflow to the surface of the workpiece 14. The impurities that have been loosened by the rotation are more easily captured by the airflow. The equipment can suck the impurities into the collection chamber with a low negative pressure. After the short-stroke frame 68 is re-fitted with the inner wall of the first slide 64, the first slide 64 once again limits the short-stroke frame 68. The second electric push rod 601 continues to extend and retract, driving the short-stroke frame 68 to move horizontally along the inside of the first slide 64. The sliding plate 63 simultaneously drives the support frame 62 and the station clamp 11 to move closer to the positioning plate 13. refer to Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the workstation clamping block 11 sequentially completes horizontal movement, flipping movement, and secondary horizontal movement along one side of the centering frame 61. When the workpiece 14 on the workstation clamping block 11 is attached to the positioning plate 13, the multi-motion transfer frame 12 performs a telescopic action, and its built-in grippers move closer to the workpiece 14, removing the workpiece 14 from the workstation clamping block 11. After the grippers hold the workpiece 14, they lift and move horizontally, gradually approaching the positioning plate 13. Then, the grippers move downward again, placing the workpiece 14 inside the positioning plate 13. The electric push rod frame 31 pushes the frame 32 to move along the guide structure. The frame 32 simultaneously drives the gripping claw 21 and the torsion frame 23 to move along the displacement groove 37 towards the inside of the positioning plate 13. The gripping claw 21 first contacts the bottom of the workpiece 14 and generates mutual squeezing force. After being subjected to force, the gripping claw 21 moves towards the torsion frame 23, and the push rod 51 slides along the inside of the torsion frame 23 and the limiting ring frame 53. The second spring 52 generates elastic compression deformation between the push rod 51 and the limiting ring frame 53. The second spring 52 applies a reverse thrust to the push rod 51 based on its own elasticity, pushing the clamping claw 21 to fit against the outside of the workpiece 14 again. Affected by the local concave and convex structure of the outer contour of the workpiece 14, at the moment the clamping claw 21 contacts the workpiece 14, the elastic adaptation structure is squeezed by the local high point of the surface, and the clamping claw 21 as a whole generates flexible yielding. The remaining contact area can still maintain tight fit. Rotate the outer threaded ring 55 to form a threaded engagement with the inner threaded ring 56. The outer threaded ring 55 can make horizontal reciprocating motion along the inside of the inner threaded ring 56. During the rotation of the outer threaded ring 55, it drives the concentric ring 54 to rotate synchronously along one end of the limiting ring frame 53, and at the same time pushes the limiting ring frame 53 to move horizontally along the inside of the torsion frame 23, thereby adjusting the distance between the limiting ring frame 53 and the push rod 51, and thus changing the elastic compression of the second spring 52. refer to Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, immediately afterwards, the first electric actuator 36 extends and retracts, pushing the contact roller 35 to move horizontally. The contact roller 35 slides along the inside of the arc groove 34, forming a slope fit structure with the arc groove 34. After the two come into contact with each other, they push the torsion frame 23 to rotate in an arc along one side of the knob frame 33. During the movement of the torsion frame 23, it drives the clamping jaw 21 to move in an arc along the outside of the workpiece 14. When the flexible pad 22 of the clamping jaw 21 contacts the workpiece 14, it maintains an arc-shaped fit. The middle part of the clamping jaw 21 is an arc-shaped structure, and the lower part of the arc-shaped section is connected to a vertical structure. In the initial stage of clamping, the arc-shaped section wraps around the workpiece 14 with a large curvature. 4. The bottom rounded corners and arc-shaped edges support the weight of the workpiece 14 through surface contact, while providing initial centering constraints in the horizontal direction. The vertical section fits against the side wall of the workpiece 14 near the bottom, applying a vertical supporting force to the workpiece 14 and reducing the probability of the workpiece 14 tipping over during transportation. The arc-shaped section and the vertical section respectively realize the functions of bottom support and lateral protection, decomposing the clamping force in a single direction into two types of directional constraints: lifting and support. Under the premise of ensuring support stability, the clamping claw 21 does not need to apply a large radial clamping force. The workpiece 14 can maintain a stable posture before being transported to the inspection station and is not prone to slight shaking or tilting. refer to Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, finally, the gripper 21 moves outward along the arc-shaped trajectory towards the workpiece 14. After the flexible pad 22 contacts the workpiece 14, it gradually undergoes compression deformation. The pressure is distributed sequentially along the arc-shaped contact surface, preventing the entire contact surface from being simultaneously compressed. Ultimately, a gradient pressure field is formed in the contact area. The positioning plate 13 moves smoothly towards the detection area along the inside of the detection frame 1. When the workpiece 14 moves into the detection area, the first electric push rod 36 retracts, driving the abutment roller 35 to reset along the arc-shaped slide groove 34, thereby driving the torsion frame 23. The clamping jaws retract along an arc along one side of the frame 32, and simultaneously move in an arc along the outer side of the workpiece 14, opening outward in a figure-eight shape. The clamping jaws 21 use an arc trajectory to complete the opening action, rather than a straight retraction. In the initial stage of structural separation, the jaws still slide slightly along the bottom arc surface of the workpiece 14, gradually reducing the lifting force, and will not detach from the workpiece 14 instantly. The figure-eight outward movement can leave a complete space below the bottom of the workpiece 14. The first servo motor 48 starts, driving the rotating disk 41 to rotate along the inside of the positioning plate 13, lifting... The frame 42 and the lifting column 47 form a slope transmission engagement, pushing the lifting column 47 to slide upward along the inside of the through hole 43. Simultaneously, the lifting column 47 drives the lower cover ring 46 to move upward along the inside of the through hole 43, while also sliding along the inside of the upper cover ring 44, pushing the top protrusion 24 to abut against the bottom of the workpiece 14. This causes the workpiece 14 to rise upward along the flexible pad 22 and the positioning plate 13. The first spring 45 generates elastic compression between the lower cover ring 46 and the upper cover ring 44. The spring, relying on its own elasticity, applies a downward reverse thrust to the lower cover ring 46, causing the lifting column... 47 maintains a stable contact with the lifting frame 42, ensuring that the lifting column 47 moves smoothly along the inside of the through hole 43. After the bottom of the workpiece 14 is lifted above the tip of the clamping claw 21, the workpiece 14 is supported by the top protrusion 24. The bottom of the workpiece 14 is only limited by the clamping claw 21 in a small area. Most of the workpiece 14 is out of the contact range of the positioning plate 13, forming a low-obstruction suspended support state at the inspection station, so that the optical inspection equipment can completely obtain the imaging field of view of the bottom of the workpiece 14, ensuring effective coverage of the inspection optical path.
[0020] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A product testing device, comprising a testing frame (1), a workpiece (14), and a suction device (15), wherein a station clamping block (11), a multi-motion transfer frame (12), and a positioning plate (13) are sequentially installed inside the testing frame (1), and the station clamping block (11) and the multi-motion transfer frame (12) are used to stably place the workpiece (14) inside the positioning plate (13), characterized in that: The positioning plate (13) is provided with a clamping assembly (2) inside, and the clamping assembly (2) is used to apply a constant pressure to the workpiece (14) inside the positioning plate (13) while lifting the workpiece (14) during the detection process to observe the changes on the sample surface. The clamping assembly (2) includes several torsion frames (23) installed inside the positioning plate (13). Each torsion frame (23) is movably connected to a clamping claw (21) on one side. The middle part of the clamping claw (21) is curved and vertical from the curve downward. A flexible pad (22) is fixedly connected to the side of the clamping claw (21) near the workpiece (14). Several top protrusions (24) are installed inside the positioning plate (13). The positioning plate (13) is provided with a motion component (3) on its exterior, and the motion component (3) is used to drive the torsion frame (23) to move horizontally and in an arc trajectory. The positioning plate (13) is provided with a synchronization component (4) that pushes several top protrusions (24) to move synchronously upward or downward. The inspection frame (1) is equipped with a flipping component (6) inside, and the flipping component (6) is used to flip the station clamp (11) during the movement along the top of the suction device (15), while providing a stable inspection environment for the optical inspection of the auxiliary workpiece (14).
2. The product testing equipment according to claim 1, characterized in that: The motion component (3) includes a displacement groove (37) opened on the outside of the positioning plate (13) and communicating with its interior, and a knob frame (33) hinged to the bottom of the torsion frame (23). The top of the knob frame (33) is fixedly connected to a first electric push rod (36), and there is a floating gap between the first electric push rod (36) and the torsion frame (23). The output end of the first electric actuator (36) is equipped with an abutment roller (35), and the top of the torsion frame (23) is provided with an arc groove (34) for guiding the movement of the abutment roller (35), and the arc groove (34) is designed as an arc shape. An electric push rod frame (31) is connected between the positioning plate (13) and the displacement groove (37). A frame (32) is fixedly connected to the bottom of the knob frame (33), and the electric push rod frame (31) is used to drive the frame (32) to move left and right. The clamping claw (21) and the torsion frame (23) are connected by two symmetrical adaptation components (5).
3. The product testing equipment according to claim 2, characterized in that: Each of the aforementioned adaptation components (5) includes a push rod (51) hinged to one side of the clamping claw (21) and a limiting ring frame (53) slidably connected inside the torsion frame (23), and one end of the push rod (51) passes through the torsion frame (23) and the limiting ring frame (53) in sequence. A second spring (52) is connected between the top rod (51) and the limiting ring (53), and the second spring (52) is used to provide a reaction force to one end of the top rod (51).
4. The product testing equipment according to claim 3, characterized in that: The inside of the torsion frame (23) is also fixedly connected to an inner threaded ring (56), and one end of the limiting ring frame (53) is movably connected to a concentric ring (54). The end of the concentric ring (54) near the inner threaded ring (56) is fixedly connected to an outer threaded ring (55), and the outer threaded ring (55) and the inner threaded ring (56) are screwed together. The second spring (52) adjusts its own elastic tension through the outer threaded ring (55).
5. The product testing equipment according to claim 1, characterized in that: The synchronization component (4) includes a rotating disk (41) rotatably connected inside the positioning plate (13) and a lifting column (47) fixedly connected to the bottom end of the top protrusion (24). The positioning plate (13) has a through hole (43) communicating with its interior. The top end of the rotating disk (41) is fixedly connected to a lifting frame (42). One end of the lifting column (47) passes through the through hole (43) and abuts against the top of the lifting frame (42). The lifting frame (42) and the lifting column (47) maintain a slope fit. The bottom of the positioning plate (13) is fixedly connected to a first servo motor (48), and the output end of the first servo motor (48) extends into the interior of the positioning plate (13) and is fixedly connected to the bottom of the rotating disk (41).
6. The product testing equipment according to claim 5, characterized in that: An upper cover ring (44) is fixedly connected inside the through hole (43), and the upper cover ring (44) is movably sleeved on the outside of the lifting column (47). A lower cover ring (46) is fixedly sleeved on the bottom of the lifting column (47), and the lower cover ring (46) is slidably connected inside the through hole (43). A first spring (45) is connected between the upper cover ring (44) and the lower cover ring (46), and the first spring (45) is sleeved on the outside of the lifting column (47). The lifting column (47) is stably in contact with the top of the lifting frame (42) through the first spring (45).
7. The product testing equipment according to claim 1, characterized in that: The flipping assembly (6) includes a support frame (62) fixedly connected to one end of the workstation clamp (11) and a centering frame (61) fixedly connected to the side of the inspection frame (1) near the workstation clamp (11). The top of the centering frame (61) is provided with a second slide groove (65), and one side of the centering frame (61) is provided with a first slide groove (64) communicating with the interior of the second slide groove (65). The first slide groove (64) and the second slide groove (65) together form a C-shaped structure. A sliding plate (63) is slidably connected to one side of the centering frame (61), and a concentric horizontal column (66) is installed on one side of the centering frame (61). One end of the concentric horizontal column (66) passes through the first sliding groove (64) and the sliding plate (63) in sequence and is connected to one side of the support frame (62). A gear (67) is sleeved on one end of the concentric horizontal column (66) located outside the first sliding groove (64). The first slide groove (64) and the second slide groove (65) are slidably connected to a short-stroke frame (68), and the short-stroke frame (68) is designed as an L-shaped structure. The short-stroke frame (68) is located on the outside of the first slide groove (64) and sleeved on the outside of the concentric horizontal column (66). A rack (69) is fixedly connected to one side of the centering frame (61), and the rack (69) meshes with the gear (67).
8. The product testing equipment according to claim 7, characterized in that: The centering frame (61) is fixedly connected to a second electric push rod (601) on the side near the workstation clamp (11). The telescopic end of the second electric push rod (601) is fixedly connected to the top of the sliding plate (63). The centering frame (61) is fixedly connected to a horizontal guide rod (602) on the side near the second electric push rod (601), and the sliding plate (63) is slidably sleeved on the outside of the horizontal guide rod (602).