Heat dissipation cover surface flaw detection equipment

Abstract

The invention discloses surface flaw detection equipment for a heat dissipation cover. The surface flaw detection equipment comprises a feeding unit, a lower visual detection unit, a transfer unit, an upper visual detection unit and a discharging unit, the feeding unit adopts a three-stage progressive transplanting mechanism, and high-precision material positioning and reversing are achieved in combination with a dynamic distance adjusting mechanism and a double-station synchronous carrying table. The lower visual detection unit adopts a double-camera structure to detect the lower end surface defects of the heat dissipation cover material; and the transfer unit realizes seamless connection of upper and lower visual detection stations through a servo turntable. The upper visual detection unit detects upper end face flaws through a high-speed camera, and the discharging unit completes classified discharging through an XYZ three-axis transplanting mechanism. Linear motion control is adopted to replace a traditional rotating mechanism, servo synchronous adjustment and double-station parallel detection are combined, the detection efficiency and compatibility are improved, an automatic correction system and an automatic transfer system are integrated, manual intervention is remarkably reduced, and the device is suitable for high-precision automatic detection scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic device detection equipment, and particularly relates to a surface defect detection device for a heat dissipation cover. Background Art

[0002] With the continuous improvement of industrial automation level, the requirements for the surface quality detection of parts are becoming increasingly strict. As a key heat dissipation component, the surface quality of the heat dissipation cover directly affects the product performance and service life. However, the existing heat dissipation cover detection equipment has the following technical defects: Insufficient detection efficiency: Most of the existing detection equipment adopts a single-station detection method, and a mechanical flipping mechanism is required to achieve double-sided detection. The detection cycle is long and the workpiece displacement is likely to occur during the flipping process, seriously affecting the detection efficiency.

[0003] Poor compatibility: Traditional equipment usually uses suction cups or fixtures with fixed spacing. When it is necessary to detect heat dissipation covers of different specifications or when the specifications of the heat dissipation cover trays change, the fixture must be replaced by stopping the machine, seriously affecting the production efficiency. Especially in the production mode of small batches and multiple varieties, the equipment utilization rate is greatly reduced.

[0004] Low degree of automation: The material transfer of the existing technology mostly relies on manual operation, and manual loading and unloading and positioning correction are required. This not only increases the labor cost, but also is difficult to ensure the consistency of operation and is prone to introducing human errors.

[0005] Poor consistency of detection accuracy: Due to the lack of a precise positioning and correction system, the existing equipment has poor repeat positioning accuracy and cannot meet the detection requirements of high-precision heat dissipation covers. Especially during double-sided detection, due to inconsistent positioning references, false detection and missed detection are likely to occur.

[0006] Therefore, in view of the deficiencies of the existing technology, it is necessary to design a surface defect detection device for a heat dissipation cover to solve the above problems.

[0007] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be considered that the above content is well-known to those skilled in the art just because these contents are described in the background art of the present invention. Summary of the Invention

[0008] In order to overcome the above deficiencies in the prior art, the purpose of the present invention is to disclose a surface defect detection device for a heat dissipation cover, which can achieve efficient, high-precision and highly compatible automatic detection.

[0009] The present invention discloses a surface defect detection device for a heat dissipation cover, including: a loading unit, a lower vision detection unit, a transfer unit, an upper vision detection unit and a unloading unit, wherein: The feeding unit adopts a three - stage progressive transplanting mechanism, including a first XYZ three - axis transplanting mechanism, a first Y - axis transplanting mechanism, and a first XZ two - axis transplanting mechanism that are connected in sequence; it realizes the transplanting and positioning of the heat dissipation cover materials, and uses the connection between the first Y - axis transplanting mechanism and the first XZ two - axis transplanting mechanism to replace the traditional rotating shaft commutation. Since the linear motion control is easier than the angular control, it is easier to ensure the consistency of the transplanting and commutation trajectories of the heat dissipation cover materials.

[0010] A dynamic spacing adjustment mechanism is provided at the end of the first XYZ three - axis transplanting mechanism, including at least two first negative pressure suction heads whose spacing is synchronously controlled by a servo motor; it improves the compatibility with different models of heat dissipation cover materials and heat dissipation cover material trays.

[0011] A double - station synchronous carrier is provided on the first Y - axis transplanting mechanism, including two first placement seats with a fixed spacing; it ensures the relative position stability of the heat dissipation cover materials on the two first placement seats and improves the docking accuracy with the first XZ two - axis transplanting mechanism.

[0012] A docking suction head group is provided at the end of the first XZ two - axis transplanting mechanism, including two second negative pressure suction heads that are synchronously aligned with the first placement seats; it is used to reverse the movement direction of two heat dissipation cover materials moving along the Y - axis direction to move along the X - axis direction.

[0013] The lower vision detection unit includes two lower vision detection cameras, which are respectively arranged below the moving paths of the second negative pressure suction heads, and a first detection light source is provided at the detection port of each lower vision detection camera; it is used to detect whether there are defects on the lower end surface of the heat dissipation cover materials.

[0014] The transfer unit includes a servo turntable, and at least two placement components are arranged in an array along the outer circumference of the servo turntable. The placement component is composed of two symmetrically arranged second placement seats, and the two second placement seats can be simultaneously docked with the two second negative pressure suction heads; by rotating the servo turntable, the two heat dissipation cover materials whose lower end surfaces have been detected can be synchronously moved to the upper vision detection unit, ensuring the orderliness of the heat dissipation cover material detection; at the same time, it realizes the parallel operation of the feeding and detection stations, reducing the cycle time.

[0015] The upper vision detection unit includes two upper vision detection cameras with adjustable spacing, which are respectively arranged above the moving paths of the second placement seats, and a second detection light source is provided at the detection port of each upper vision detection camera; it is used to detect whether there are defects on the upper end surface of the heat dissipation cover materials.

[0016] The discharging unit includes a second XYZ three - axis transplanting mechanism, and at least one third negative pressure suction head is provided at the end of the second XYZ three - axis transplanting mechanism. The detected heat dissipation cover materials are transplanted into the designated heat dissipation cover material trays through the third negative pressure suction head, realizing the classified discharging of the heat dissipation cover materials.

[0017] Preferred technical solution: There are three first negative pressure suction heads in the dynamic spacing adjustment mechanism. The three first negative pressure suction heads are arranged in a straight line. Among them, the middle first negative pressure suction head is fixed, and the first negative pressure suction heads on both sides are driven by a servo motor to achieve synchronous and symmetric displacement, which is convenient for realizing the automatic adjustment of the spacing between the first negative pressure suction heads.

[0018] Preferred technical solution: Both the first placement seat and the second placement seat include: symmetrically arranged V-shaped jaws, and the V-shaped jaws are driven by a cylinder to open, and are pulled by a return spring to close and reset; sensors for detecting whether the heat dissipation cover material is in place are provided at the lower ends of the first placement seat and the second placement seat, realizing the automatic identification of the transfer of the heat dissipation cover material and avoiding material leakage.

[0019] Preferred technical solution: At least one material transfer unit is provided on the moving paths of the first XYZ three-axis transplanting mechanism and the second XYZ three-axis transplanting mechanism. The material transfer unit includes a lifting well, a transfer trolley and a lifting pallet. A side door for the transfer trolley to enter and exit is provided on the side wall of the lifting well. The lifting pallet can be inserted into the bottom of the heat dissipation cover material tray on the transfer trolley to lift the tray to the grasping position of the transplanting mechanism. After the transfer trolley enters the lifting well, the heat dissipation cover material tray on it is automatically docked with the lifting pallet, eliminating the need for manual operation and improving the feeding efficiency.

[0020] Preferred technical solution: Vertical guide plates are provided on the side walls of the lifting well, and the guide plates enclose a guide channel matching the outer shape of the heat dissipation cover material tray to ensure the accuracy of the lifting trajectory of the heat dissipation cover material tray.

[0021] Preferred technical solution: The transfer trolley is provided with a baffle for restricting the lateral movement of the heat dissipation cover material tray.

[0022] Preferred technical solution: Guide wheels are provided on the side of the transfer trolley, and guide rails cooperating with the guide wheels are provided in the lifting well, which is used to facilitate the docking of the transfer trolley with the lifting well and improve the docking accuracy.

[0023] Preferred technical solution: A locking mechanism for restricting the movement of the transfer trolley is also provided in the lifting well to ensure the stability of the transfer trolley and facilitate automatic control.

[0024] Preferred technical solution: A calibration mechanism is provided at the top of the lifting well, including a plurality of calibration cylinders arranged circumferentially. The output ends of the calibration cylinders are provided with profiling push plates in contact with the side of the heat dissipation cover material tray, ensuring the stability of the placement of the heat dissipation cover material tray and avoiding the positioning deviation of the heat dissipation cover material on it due to deformation.

[0025] Preferred technical solution: Multiple material transfer units are arranged in a straight line, and a pallet transfer unit is provided above them. The pallet transfer unit includes a transfer and planting mechanism that moves along the arrangement direction of the multiple material transfer units. A transfer lifting mechanism is provided at the moving end of the transfer and planting mechanism, and several suction cups for docking with the heat dissipation cover material pallet are provided at the lower end of the transfer lifting mechanism. The pallet transfer unit is used to transfer and plant the pallets in each material transfer unit, ensuring that the empty pallets are removed in time during feeding, and at the same time ensuring the stability of the pallet supply during discharging.

[0026] Due to the application of the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows: 1) A three-stage progressive transplanting mechanism is adopted to replace the traditional rotary conversion direction, and the material is turned through the combination of linear motions, improving the control accuracy.

[0027] 2) The dynamic spacing adjustment mechanism adopts a negative pressure suction head layout of "1 fixed + 2 adjustable", and with servo synchronous control, it can be compatible with different sizes of heat dissipation cover materials and heat dissipation cover material pallets, and the adjustment response is fast.

[0028] 3) Through the coordination of the double-station design and the servo turntable transfer, seamless connection of the detection stations is achieved, and the detection efficiency is significantly improved.

[0029] 4) The upper and lower vision detection units are separately designed, combined with the precise positioning of the servo turntable, eliminating the flipping action and reducing the single-piece detection time.

[0030] 5) The servo motor synchronously controls the suction head spacing, adapts to various specifications of heat dissipation cover materials and heat dissipation cover material pallets, significantly reduces the changeover time, and improves the compatibility.

[0031] 6) The profiling push plate automatically corrects according to the contour of the heat dissipation cover material, which is better than manual correction.

[0032] 7) The spring reset design of the V-shaped clamping jaws ensures a constant clamping force and avoids damaging the heat dissipation cover material.

[0033] 8) The lifting shaft is used in combination with the lifting pallet to realize the automatic loading and unloading of the heat dissipation cover material pallet on the transfer cart. Description of the Drawings

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a top view of a heat dissipation cover surface defect detection device of the present invention; Figure 2 Isometric view of a surface defect detection device for a heat dissipation cover of the present invention; Figure 3 Schematic structural diagram of the first XYZ three-axis transplanting mechanism in the present invention; Figure 4 Schematic structural diagram of the first Y-axis transplanting mechanism in the present invention; Figure 5 Schematic structural diagram of the first XZ two-axis transplanting mechanism in the present invention; Figure 6 Schematic structural diagram of the lower vision detection camera in the present invention; Figure 7 Schematic structural diagram of the servo turntable in the present invention; Figure 8 Schematic structural diagram of the upper vision detection camera in the present invention; Figure 9 Schematic structural diagram of the second XYZ three-axis transplanting mechanism in the present invention; Figure 10 Schematic structural diagram of the V-shaped gripper in the present invention; Figure 11 Schematic structural diagram of the lift well in the present invention; Figure 12 Schematic structural diagram of the middle transfer transplanting mechanism in the present invention.

[0036] In the above drawings, 101 is the first XYZ three-axis transplanting mechanism; 101a is the first negative pressure suction head; 102 is the first Y-axis transplanting mechanism; 102a is the first mounting seat; 103 is the first XZ two-axis transplanting mechanism; 103a is the second negative pressure suction head; 201 is the lower vision detection camera; 202 is the first detection light source; 301 is the servo turntable; 302 is the second mounting seat; 401 is the upper vision detection camera; 402 is the second detection light source; 501 is the second XYZ three-axis transplanting mechanism; 502 is the third negative pressure suction head; 601 is the cylinder; 602 is the V-shaped gripper; 603 is the return spring; 701 is the lift well; 702 is the transfer trolley; 703 is the lifting support plate; 704 is the vertical guide plate; 705 is the baffle; 706 is the guide wheel; 707 is the guide rail; 708 is the locking mechanism; 709 is the calibration cylinder; 710 is the profiling push plate; 801 is the middle transfer transplanting mechanism; 802 is the middle transfer lifting mechanism; 803 is the suction cup. Detailed implementation mode

[0037] The following specific embodiments illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0038] It should be noted that in the description, claims and the above drawings of the present application, terms such as "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of the present application here. In addition, the terms "including" and "having" and their synonyms are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0040] Moreover, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the terms "installed", "set", "provided with", "connected", "linked", "socketed", "fitted" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. Another example is that "fitted" can be completely close-fitting or partially close-fitting. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] Embodiment: Such as Figure 1 and Figure 2As shown in the figure, the present invention discloses a surface defect detection device for a heat dissipation cover, which includes a feeding unit, a lower vision detection unit, a transfer unit, an upper vision detection unit, and a discharging unit. Each unit is seamlessly connected through servo control. The following will specifically describe the main components of the present invention above: As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in the figure, the feeding unit adopts a three-stage progressive transplanting mechanism, which specifically includes: The first XYZ three-axis transplanting mechanism 101, the end of which is provided with a dynamic pitch adjustment mechanism, including three first negative pressure suction heads 101a arranged in a straight line. The middle suction head is fixed, and the two side suction heads are driven by a servo motor to achieve synchronous and symmetric displacement to adapt to heat dissipation cover material trays of different specifications.

[0044] The first Y-axis transplanting mechanism 102, which is provided with a double-station synchronous carrier. The two first placement seats 102a move synchronously with an unchanged distance, and are used to receive the heat dissipation cover material from the first XYZ three-axis transplanting mechanism 101 and drive it to move along the Y-axis direction.

[0045] The first XZ two-axis transplanting mechanism 103, with two second negative pressure suction heads 103a at the end. After aligning with the first placement seat 102a, it grabs the heat dissipation cover material, changes its direction to move in the X-axis direction, and transports it to the lower vision detection unit.

[0046] As Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown in the figure, the lower vision detection unit includes two lower vision detection cameras 201, which are respectively arranged below the moving paths of the two second negative pressure suction heads 103a. Each camera is equipped with a first detection light source 202 for high-precision defect detection of the lower end face of the heat dissipation cover material.

[0047] As Figure 1 , Figure 2 and Figure 7 As shown in the figure, the transfer unit adopts a servo turntable 301, and two pairs of second placement seats 302 are arranged in an array on its outer circumference.

[0048] As Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown in the figure, the upper vision detection unit includes two upper vision detection cameras 401 with adjustable spacing, which are arranged above the moving paths of the second placement seats 302 on the servo turntable 301. The camera spacing is synchronously adjusted by a servo motor to adapt to heat dissipation cover materials of different specifications. The second detection light source 402 provides uniform illumination to ensure the detection accuracy of the upper end face defects.

[0049] As Figure 1 , Figure 2 , Figure 9 and Figure 12 shown, a third negative pressure suction head 502 is provided at the end of the second XYZ three-axis transfer mechanism 501 of the blanking unit. According to the detection results, the suction head classifies and transfers qualified products and defective products to the designated trays. Four material transfer units, namely heat dissipation cover loading, empty tray transfer, heat dissipation cover OK blanking, and heat dissipation cover NG blanking, are arranged in a straight line along the path of the second XYZ three-axis transfer mechanism 501, and the automatic replacement of empty trays and full trays is realized through the transfer and transfer mechanism 801, the transfer and lifting mechanism 802, and the suction cup 803.

[0050] Refer to Figures 1 to 12 shown, the usage method and principle of the present invention are as follows: When in use, at the material transfer unit for heat dissipation cover loading, the heat dissipation cover material tray loaded with heat dissipation cover materials enters the lifting shaft 701 by the transfer trolley 702, and the lifting support plate 703 lifts the tray to the grasping position; the first XYZ three-axis transfer mechanism 101 grabs the heat dissipation cover materials by dynamically adjusting the suction head spacing, and transfers them to the XZ two-axis transfer mechanism 103 through the Y-axis transfer mechanism 102 to complete commutation and positioning; the XZ two-axis transfer mechanism 103 drives the heat dissipation cover materials and pauses above the lower vision detection camera 201, and the camera collects images and analyzes surface defects through algorithms; after the lower end surface detection of the heat dissipation cover materials is completed, the XZ two-axis transfer mechanism 103 places the heat dissipation cover materials on the second placement seat 302; the servo turntable 301 rotates 180°, and synchronously transfers the heat dissipation cover materials to the upper vision detection camera 401. This design realizes parallel operation of the upper and lower detection stations and reduces the cycle time; after the detection is completed, the servo turntable 301 rotates 90°, and the second XYZ three-axis transfer mechanism 501 adsorbs the heat dissipation cover materials after detection through the third negative pressure suction head 502, and respectively places the heat dissipation cover materials into the material transfer units at the heat dissipation cover OK blanking and heat dissipation cover NG blanking according to the detection results. At the same time, the transfer and transfer mechanism 801, the transfer and lifting mechanism 802, and the suction cup 803 automatically transfer and replace the empty trays at the four material transfer units of heat dissipation cover loading, empty tray transfer, heat dissipation cover OK blanking, and heat dissipation cover NG blanking.

[0051] As Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 10 shown, both the first placement seat 102a and the second placement seat 302 are provided with V-shaped jaws 602, which are driven to open by the cylinder 601, and the return spring 603 provides a constant clamping force. After the jaws are closed, the sensor detects the in-position state of the heat dissipation cover materials.

[0052] As Figure 1 , Figure 2 andFigure 11 As shown in the figure, the material transfer unit includes a lifting shaft 701, a transfer trolley 702 and a lifting pallet 703. A side door for the transfer trolley 702 to enter and exit is provided on the side wall of the lifting shaft 701. The lifting pallet 703 can be inserted into the bottom of the heat dissipation cover material tray on the transfer trolley 702 to lift the tray to the grasping position of the transplanting mechanism; A vertical guide plate 704 is provided on the side wall of the lifting shaft 701, and the vertical guide plates 704 enclose a guide channel matching the outer shape of the heat dissipation cover material tray; The transfer trolley 702 is provided with a baffle 705 for restricting the lateral movement of the heat dissipation cover material tray; Guide wheels 706 are provided on the side of the transfer trolley 702, and guide rails 707 cooperating with the guide wheels 706 are provided in the lifting shaft 701; A locking mechanism 708 for restricting the movement of the transfer trolley 702 is also provided in the lifting shaft 701; A calibration mechanism is provided at the top of the lifting shaft 701, including a plurality of calibration cylinders 709 arranged circumferentially. The output end of the calibration cylinder 709 is provided with a profiling push plate 710 in contact with the side of the heat dissipation cover material tray; The transfer trolley 702 enters the lifting shaft 701 along the guide rail 707. After the locking mechanism 708 fixes the trolley, the lifting pallet 703 lifts the tray to the grasping position.

[0053] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat dissipation cover surface defect detection device, characterized in that: include: Loading unit, lower visual inspection unit, transfer unit, upper visual inspection unit and unloading unit, wherein: The loading unit adopts a three-stage progressive transplanting mechanism, including a first XYZ three-axis transplanting mechanism (101), a first Y-axis transplanting mechanism (102) and a first XZ two-axis transplanting mechanism (103) connected in sequence; A dynamic spacing adjustment mechanism is provided at the end of the first XYZ three-axis transplanting mechanism (101), comprising at least two first negative pressure suction heads (101a) whose spacing is synchronously controlled by a servo motor; The first Y-axis transplanting mechanism (102) is provided with a double-station synchronous carrier, comprising two first placement seats (102a) with a fixed spacing; A docking suction head group is provided at the end of the first XZ dual-axis transplanting mechanism (103), comprising two second negative pressure suction heads (103a) synchronously aligned with the first placement seat (102a); The lower visual inspection unit comprises two lower visual inspection cameras (201), which are respectively arranged below the moving path of the second negative pressure suction head (103a), and a first inspection light source (202) is provided at the inspection port of each lower visual inspection camera (201); The transfer unit comprises a servo turntable (301), on which at least two placement components are arranged in an array along the outer circumference thereof, the placement component is composed of two symmetrically arranged second placement seats (302), and the two second placement seats (302) are capable of docking with two second negative pressure suction heads (103a) at the same time; The upper visual inspection unit comprises two upper visual inspection cameras (401) with adjustable spacing, which are respectively arranged above the moving path of the second placement seat (302), and a second inspection light source (402) is provided at the inspection port of each upper visual inspection camera (401); The material unloading unit comprises a second XYZ three-axis transplanting mechanism (501), and at least one third negative pressure suction head (502) is provided at the end of the second XYZ three-axis transplanting mechanism (501).

2. The heat dissipation cover surface defect detection device according to claim 1, characterized in that: There are three first negative pressure suction heads (101a) in the dynamic spacing adjustment mechanism, and the three first negative pressure suction heads (101a) are arranged in a straight line, wherein the middle first negative pressure suction head (101a) is fixed, and the first negative pressure suction heads (101a) on both sides are driven by a servo motor to achieve synchronous symmetrical displacement.

3. The heat dissipation cover surface defect detection device according to claim 1, characterized in that: The first placement seat (102a) and the second placement seat (302) both comprise: symmetrically arranged V-shaped clamping jaws (602), the V-shaped clamping jaws (602) being driven to open by a cylinder (601), and being pulled to close and reset by a reset spring (603); the lower ends of the first placement seat (102a) and the second placement seat (302) are both provided with sensors for detecting whether the heat dissipation cover material is in place.

4. The heat dissipation cover surface defect detection device according to claim 1, characterized in that: At least one material transfer unit is provided on the moving paths of the first XYZ three-axis transplanting mechanism (101) and the second XYZ three-axis transplanting mechanism (501), and the material transfer unit comprises a lifting shaft (701), a transfer trolley (702) and a lifting pallet (703). The side wall of the lifting shaft (701) is provided with a side door for the transfer trolley (702) to enter and exit, and the lifting pallet (703) can be inserted into the bottom of the heat dissipation cover material tray on the transfer trolley (702) to lift the tray to the grabbing position of the transplanting mechanism.

5. The heat dissipation cover surface defect detection device according to claim 4, characterized in that: The side wall of the lifting shaft (701) is provided with a vertical guide plate (704), and the vertical guide plate (704) encloses a guide channel that matches the shape of the heat dissipation cover material tray.

6. The heat dissipation cover surface defect detection device according to claim 4, characterized in that: The transfer trolley (702) is provided with a baffle (705) for limiting the lateral movement of the heat dissipation cover material tray.

7. The heat dissipation cover surface defect detection device according to claim 4, characterized in that: A guide wheel (706) is provided on the side of the transfer trolley (702), and a guide rail (707) cooperating with the guide wheel (706) is provided in the lifting shaft (701).

8. The heat dissipation cover surface defect detection device according to claim 4, characterized in that: A locking mechanism (708) for limiting the movement of the transfer trolley (702) is also provided in the lifting shaft (701).

9. The heat dissipation cover surface defect detection device according to claim 4, characterized in that: A correction mechanism is provided at the top of the lifting shaft (701), comprising a plurality of correction cylinders (709) arranged along the circumferential direction, and a contoured push plate (710) is provided at the output end of the correction cylinder (709) for contacting the side edge of the heat dissipation cover material tray.

10. The heat dissipation cover surface defect detection device according to claim 4, characterized in that: The plurality of material transfer units are arranged in a straight line, and a pallet transfer unit is provided above them, the pallet transfer unit comprises a transfer mechanism (801) that moves along the arrangement direction of the plurality of material transfer units, a transfer lifting mechanism (802) is provided at the moving end of the transfer mechanism (801), and a plurality of suction cups (803) that are connected to the heat dissipation cover material tray are provided at the lower end of the transfer lifting mechanism (802).

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