Visual inspection equipment for PTC thermistor ceramic sheet

Abstract

A visual inspection device for PTC thermistor ceramic sheets includes a frame, a flipping mechanism, a sliding cylinder, a three-axis cylinder, and a vacuum adsorption block. Several ceramic sheets are adsorbed by the vacuum adsorption block and then transported to a detection probe module for resistance testing via the three-axis cylinder and the sliding cylinder. After the three-axis cylinder resets, the flipping cylinder pushes the crank arm, causing the flipping plate to rotate 90° clockwise. At this point, the bottom surface of the ceramic sheet adsorbed on the vacuum adsorption block is exposed. A bottom-surface visual acquisition camera captures images of the bottom of the ceramic sheet. This device not only enables resistance testing of the ceramic sheet but also visual inspection of both the front and back surfaces, achieving extremely high inspection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of physics, and in particular to the technology for detecting defects in thermistor ceramics, especially a visual inspection device for PTC thermistor ceramic sheets. Background Technology

[0002] The PTC thermistor ceramic sheet visual inspection and sorting equipment is an automated device specifically designed for the automatic inspection and sorting of PTC thermistor ceramic sheets. It uses machine vision technology to replace traditional manual visual inspection, achieving high-speed, high-precision, and high-consistency detection and identification of key quality characteristics such as appearance, size, and printed markings of ceramic sheets.

[0003] In existing technologies, when PTC thermistor ceramic sheets are subjected to defect visual inspection, they are laid flat on a conveyor belt and transported to the detection range of the visual inspection camera. Only the upper surface of the ceramic sheet can be detected. When the lower surface needs to be inspected, it is necessary to manually flip it over and perform a second visual inspection, which results in relatively low inspection efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a visual inspection device for PTC thermistor ceramic sheets. This invention adds a flipping mechanism and multiple sets of visual acquisition cameras to the existing resistance detection of ceramic sheets. The front visual acquisition camera captures images of the front of the ceramic sheet on the conveyor line, and the bottom visual acquisition camera captures images of the ceramic sheet with its bottom surface exposed after being flipped 90°. With one set of equipment, not only the resistance of the ceramic sheet can be detected, but also the appearance visual inspection of the front and back of the ceramic sheet can be achieved, with extremely high detection efficiency.

[0005] To achieve the above objectives, this utility model provides a visual inspection device for PTC thermistor ceramic sheets, which includes a frame, a flipping mechanism, a sliding cylinder, a three-axis cylinder, and a vacuum adsorption block.

[0006] The frame includes a base, a front detection module, a bottom detection module, a gantry, a conveyor line, and a detection probe module. The conveyor line divides the base into a visual detection area and a resistance detection area. The front detection module includes a front visual acquisition camera and a first bracket. The first bracket is erected in the visual detection area, and the front visual acquisition camera is positioned directly above the conveyor line and mounted on the first bracket. The bottom detection module includes a bottom visual acquisition camera and a second bracket. The second bracket is erected in the visual detection area, and the bottom visual acquisition camera points horizontally towards one side of the resistance detection area and is mounted on the second bracket. The gantry is erected in the resistance detection area. The detection probe module is located between the conveyor line and the gantry and is mounted on the base.

[0007] The flipping mechanism includes a flipping plate, two crank arms, and two flipping cylinders. The flipping plate has two notches, and a vertical bearing seat is connected to each of the two notches via a rotating shaft. The vertical bearing seat is fixedly installed on the gantry. The lower ends of the two crank arms are respectively connected to the two ends of the flipping plate. The piston rod ends of the two flipping cylinders are each hinged to the upper end of one of the crank arms. The cylinder body of the flipping cylinder is installed on the gantry.

[0008] The slide cylinder is horizontally mounted on the front of the flip plate, the three-axis cylinder is vertically mounted on the slider of the slide cylinder, and the vacuum adsorption block is mounted on the piston rod end of the three-axis cylinder.

[0009] Furthermore, this utility model provides a visual inspection device for PTC thermistor ceramic sheets, wherein a shaft hole is provided along the width direction of the notch, a rotating shaft is inserted into the shaft hole, a bearing is provided in the vertical bearing seat, the bearing is sleeved on the rotating shaft, and the inner end face of the crank arm abuts against the outer end of the rotating shaft.

[0010] Furthermore, this utility model provides a visual inspection device for PTC thermistor ceramic sheets, wherein two limiting blocks are provided on the end face of the gantry, the two limiting blocks are respectively provided on both sides of the gantry, the inner end face of the limiting block is fixed to the gantry by bolts, and the outer end face of the limiting block stops the back of the flip plate.

[0011] This invention has the following advantages over the prior art:

[0012] This invention uses a vacuum adsorption block to adsorb several ceramic sheets, and then uses a triaxial cylinder and a sliding cylinder to send the ceramic sheets to the detection probe module for resistance detection. After the triaxial cylinder is reset, the flip cylinder pushes the crank arm, causing the flip plate to rotate 90° clockwise. At this time, the ceramic sheets adsorbed at the bottom of the vacuum adsorption block are exposed, and the bottom visual acquisition camera captures the image of the bottom of the ceramic sheet. With one set of equipment, not only the resistance of the ceramic sheet can be detected, but also the appearance visual inspection of the front and back of the ceramic sheet can be realized, with extremely high detection efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a visual inspection device for PTC thermistor ceramic sheets according to the present invention;

[0014] Figure 2 This is a schematic diagram of the working structure of the bottom visual acquisition camera of a PTC thermistor ceramic sheet visual inspection device according to the present invention.

[0015] Figure 3This is a schematic diagram of a partial assembly structure in a visual inspection device for PTC thermistor ceramic sheets according to the present invention.

[0016] The components include: 1. Slide cylinder; 2. Three-axis cylinder; 3. Vacuum adsorption block; 4. Base; 5. Gantry; 6. Conveyor line; 7. Detection probe module; 8. Visual inspection area; 9. Resistance detection area; 10. Front visual acquisition camera; 11. First bracket; 12. Bottom visual acquisition camera; 13. Second bracket; 14. Flip plate; 15. Crank arm; 16. Flip cylinder; 17. Notch; 18. Rotating shaft; 19. Vertical bearing seat; 20. Shaft hole; 21. Limit block. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] like Figures 1-3 As shown, this embodiment provides a visual inspection device for PTC thermistor ceramic sheets, which includes a frame, a flipping mechanism, a slide cylinder 1, a three-axis cylinder 2, and a vacuum adsorption block 3;

[0021] The frame includes a base 4, a front detection module, a bottom detection module, a gantry 5, a conveyor line 6, and a detection probe module 7. The conveyor line 6 divides the base 4 into a visual detection area 8 and a resistance detection area 9. The front detection module includes a front visual acquisition camera 10 and a first bracket 11. The first bracket 11 is erected in the visual detection area 8, and the front visual acquisition camera 10 is positioned directly above the conveyor line 6 and mounted on the first bracket 11. The bottom detection module includes a bottom visual acquisition camera 12 and a second bracket 13. The second bracket 13 is erected in the visual detection area 8, and the bottom visual acquisition camera 12 points horizontally towards the resistance detection area 9 and is mounted on the second bracket 13. The gantry 5 is erected in the resistance detection area 9. The detection probe module 7 is disposed between the conveyor line 6 and the gantry 5 and is mounted on the base 4.

[0022] The tilting mechanism includes a tilting plate 14, two crank arms 15, and two tilting cylinders 16. The tilting plate 14 has two notches 17, and a vertical bearing seat 19 is connected to each of the two notches 17 via a rotating shaft 18. The vertical bearing seat 19 is fixedly installed on the gantry 5. The specific installation structure in this embodiment is as follows: Figure 3 As shown, a shaft hole 20 is provided along the width direction of the notch 17, and a rotating shaft 18 is inserted into the shaft hole 20. A bearing is provided in the vertical bearing seat 19, and the bearing is sleeved on the rotating shaft 18. The inner end face of the crank arm 15 abuts against the outer end of the rotating shaft 18. The lower ends of the two crank arms 15 are respectively connected to the two ends of the flip plate 14. The piston rod ends of the two flip cylinders 16 are each hinged to the upper end of one of the crank arms 15. The cylinder seat of the flip cylinder 16 is installed on the gantry 5.

[0023] The slide cylinder 1 is horizontally mounted on the front of the flip plate 14, the three-axis cylinder 2 is vertically mounted on the slider of the slide cylinder 1, and the vacuum adsorption block 3 is mounted on the piston rod end of the three-axis cylinder 2.

[0024] To ensure that the flip plate 14 is in a vertical position after it is in place, two limiting blocks 21 are provided on the end face of the gantry 5. The two limiting blocks 21 are respectively provided on both sides of the gantry 5. The inner end face of the limiting block 21 is fixed to the gantry 5 by bolts, and the outer end face of the limiting block 21 blocks the back of the flip plate 14.

[0025] The working process and principle of the PTC thermistor ceramic sheet visual inspection equipment in this embodiment are as follows: The front-facing visual acquisition camera 10 acquires front-facing images of the ceramic sheet laid flat on the conveyor line 6. When the ceramic sheet reaches below the vacuum adsorption block 3, the conveyor line 6 stops running. The three-axis cylinder 2 pushes the vacuum adsorption block 3 close to the ceramic sheet. After the ceramic sheet is adsorbed onto the lower end face of the vacuum adsorption block 3, the three-axis cylinder 2 resets. The sliding cylinder 1 brings the ceramic sheet above the detection probe module 7, and the three-axis cylinder 2 pushes the ceramic sheet down, making it contact the detection probe module 7. The probe module 7 performs resistance measurement and detection. After the detection is completed, the three-axis cylinder 2 is reset, the slide cylinder 1 pushes out the three-axis cylinder 2, and at this time the flip cylinder 16 pushes down the crank arm 15. The flip plate 14 rotates 90° clockwise around the vertical bearing seat 19. The ceramic sheet adsorbed on the lower end face of the vacuum adsorption block 3 faces the bottom visual acquisition camera 12 to acquire the image of the bottom face of the ceramic sheet. After the detection is completed, the flip cylinder 16 is reset, the three-axis cylinder 2 pushes down the vacuum adsorption block 3, the negative pressure is removed, and the ceramic sheet returns to the conveyor line 6 to continue the next set of tests.

[0026] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0027] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A PTC thermistor ceramic sheet visual inspection apparatus, characterized by, Includes frame, tilting mechanism, slide cylinder, three-axis cylinder and vacuum adsorption block; The frame includes a base, a front detection module, a bottom detection module, a gantry, a conveyor line, and a detection probe module. The conveyor line divides the base into a visual detection area and a resistance detection area. The front detection module includes a front visual acquisition camera and a first bracket. The first bracket is erected in the visual detection area, and the front visual acquisition camera is positioned directly above the conveyor line and mounted on the first bracket. The bottom detection module includes a bottom visual acquisition camera and a second bracket. The second bracket is erected in the visual detection area, and the bottom visual acquisition camera points horizontally towards one side of the resistance detection area and is mounted on the second bracket. The gantry is erected in the resistance detection area. The detection probe module is located between the conveyor line and the gantry and is mounted on the base. The flipping mechanism includes a flipping plate, two crank arms, and two flipping cylinders. The flipping plate has two notches, and a vertical bearing seat is connected to each of the two notches via a rotating shaft. The vertical bearing seat is fixedly installed on the gantry. The lower ends of the two crank arms are respectively connected to the two ends of the flipping plate. The piston rod ends of the two flipping cylinders are each hinged to the upper end of one of the crank arms. The cylinder body of the flipping cylinder is installed on the gantry. The slide cylinder is horizontally mounted on the front of the flip plate, the three-axis cylinder is vertically mounted on the slider of the slide cylinder, and the vacuum adsorption block is mounted on the piston rod end of the three-axis cylinder.

2. The visual inspection equipment for PTC thermistor ceramic sheets according to claim 1, characterized in that, A shaft hole is provided along the width direction of the notch, a rotating shaft is inserted into the shaft hole, a bearing is provided in the vertical bearing seat, the bearing is sleeved on the rotating shaft, and the inner end face of the crank arm abuts against the outer end of the rotating shaft.

3. The visual inspection equipment for PTC thermistor ceramic sheets according to claim 1, characterized in that, The end face of the gantry is provided with two limiting blocks, which are respectively located on both sides of the gantry. The inner end face of the limiting block is fixed to the gantry by bolts, and the outer end face of the limiting block stops the back of the flip plate.

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