CN220508809U

CN220508809U - Device for detecting workpiece on material tray

Info

Publication number: CN220508809U
Application number: CN202322094561.XU
Authority: CN
Inventors: 刘军铸
Original assignee: Suzhou Zixiang Electronic Technology Co ltd
Current assignee: Suzhou Zixiang Electronic Technology Co ltd
Priority date: 2023-08-06
Filing date: 2023-08-06
Publication date: 2024-02-20
Anticipated expiration: 2033-08-06

Abstract

The utility model discloses a device for detecting workpieces on a material tray, which comprises: the material tray conveying mechanism is used for conveying the material tray; the shooting mechanism is arranged above the tray conveying mechanism and is used for shooting workpieces on the tray; the scanning device is arranged below the tray conveying mechanism and used for scanning workpieces on the tray. The utility model can detect the front and the back of the workpiece at the same time, thereby improving the detection efficiency.

Description

Device for detecting workpiece on material tray

Technical Field

The utility model relates to the technical field of detection equipment, in particular to a device for detecting workpieces on a material tray.

Background

The material tray is an auxiliary production tool and is mainly used for turnover, auxiliary processing or workpiece storage. During production, a workpiece such as a flexible circuit board (FPC) on a tray needs to be inspected. At present, the main detection method is external visual detection, and most of external visual detection is carried out manually, but detection fatigue may occur in manual detection, so that the detection efficiency is low.

Disclosure of Invention

The utility model aims to provide a device for detecting workpieces on a tray, which is higher in efficiency.

In order to solve the above technical problems, an embodiment of the present utility model discloses a device for detecting workpieces on a tray, including:

the material tray conveying mechanism is used for conveying the material tray;

the shooting mechanism is arranged above the tray conveying mechanism and is used for shooting workpieces on the tray;

the scanning device is arranged below the tray conveying mechanism and used for scanning workpieces on the tray.

According to another embodiment of the utility model, the camera mechanism comprises a telescopic device and a camera unit connected to the telescopic device, the telescopic device being used for adjusting the distance between the camera unit and the tray in a first direction.

According to another embodiment of the utility model, the telescopic device comprises:

the connecting lug is connected with the camera unit;

the driving end of the push rod is connected with the connecting lug.

According to another specific embodiment of the utility model, the number of the connecting lugs and the number of the pushing rods are two, the pushing rods are connected with the connecting lugs in a one-to-one correspondence manner, and the two pairs of pushing rods and the connecting lugs are symmetrically arranged on two sides of the image capturing unit respectively.

According to another embodiment of the present utility model, a tray transfer mechanism includes:

the material tray conveying guide rail is arranged in an extending manner along the workpiece conveying direction and is in sliding connection with the material tray;

a driving unit;

the transmission unit is connected with the driving end of the driving unit and the material tray and is used for driving the material tray to move on the material tray conveying guide rail through the transmission unit under the driving of the driving unit.

According to another embodiment of the utility model, the transmission unit comprises a screw and a transmission wheel arranged at one end of the screw, and the driving end of the driving unit is connected with the transmission wheel through a transmission belt.

According to another embodiment of the utility model, the device for detecting the workpieces on the tray further comprises a control unit connected with the tray conveying mechanism, the camera shooting mechanism and the scanning device.

According to another embodiment of the utility model, the device for detecting the workpieces on the tray further comprises a display unit, wherein the display unit is connected with the control unit and used for displaying the results of the image pick-up mechanism and the scanning device.

According to another embodiment of the utility model, the device for detecting the workpieces on the tray further comprises an alarm unit, which is connected to the control unit.

According to another embodiment of the utility model, the alarm unit comprises an audible and visual alarm.

According to another embodiment of the utility model, the scanning device is an infrared camera.

According to another embodiment of the utility model, the scanning device comprises four infrared cameras, which are arranged in a rectangular shape below the tray conveyor.

According to another embodiment of the utility model, the device further comprises a detection rack, wherein the detection rack comprises an outer frame, a top frame connected with the top end of the frame, a bottom frame connected with the bottom end of the frame and a middle fixed frame, and the middle fixed frame is connected with the frame and is positioned below the tray conveying mechanism; wherein the tray conveying mechanism is connected with the frame, the camera shooting mechanism is connected with the frame and the top frame, and the scanning device is connected with the middle fixed frame.

According to another embodiment of the utility model, the detection frame has a cubic structure.

According to another embodiment of the utility model, the four corners of the detection frame are provided with support foot pads or casters.

According to the device for detecting the workpieces on the tray, provided by the utility model, the imaging mechanism is arranged above the tray conveying mechanism to shoot the front faces of the workpieces on the tray, the scanning device is arranged below the tray conveying mechanism to scan and detect the back faces of the workpieces on the tray, and the upper imaging mechanism is matched with the combination of the scanning devices below to detect the front faces and the back faces of the workpieces at the same time, so that the detection efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of an apparatus for inspecting workpieces on a tray according to an embodiment of the present utility model;

FIG. 2 is a partial top view of a tray conveyor rail according to an embodiment of the utility model;

fig. 3 is a schematic structural diagram of an image capturing mechanism according to an embodiment of the present utility model;

fig. 4 is a top view of a middle fixing frame according to an embodiment of the present utility model.

Reference numerals: 1. a push rod; 2. a connecting lug; 3. a collar; 4. an image pickup unit; 5. a frame; 6. a supporting plate; 7. a tray conveying guide rail; 8. a scanning device; 9. a middle fixing frame; 10. a first support frame; 11. a support foot pad; 12. a chassis; 13. an alarm unit; 14. fixing the angle; 15. a top frame; 16. a second support frame; 17. a display unit; 18. a material tray; 19. a driving unit; 20. a mounting base; 21. a trough; 22. a screw; 23. a mounting head; 24. a mounting port; 25. reinforcing the transverse plate; 26. a connecting frame; 27. a driving wheel; 141. a first edge; 142. a second side.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present utility model provides an apparatus for inspecting workpieces on a tray, comprising: a tray transfer mechanism for transferring the tray 18; the shooting mechanism is arranged above the tray conveying mechanism and is used for shooting workpieces on the tray 18; the scanning device 8 is arranged below the tray conveying mechanism and is used for scanning the workpieces on the tray 18.

By adopting the technical scheme, the front surface of the workpiece on the material tray 18 can be shot by arranging the shooting mechanism above the material tray conveying mechanism; meanwhile, the scanning device 8 is arranged below the tray conveying mechanism, so that the back surface of the workpiece on the tray 18 can be scanned and detected in a strange mode. Therefore, according to the device for detecting the workpieces on the tray, the front and the back of the workpieces can be detected at the same time, and the detection efficiency can be improved.

Specifically, as shown in fig. 2, in the present embodiment, the tray 18 is an adsorption tray, and a trough 21 is provided above the inside of the tray 18, and the trough 21 stores and fixes the workpieces. The workpieces may be placed one by one in a trough 21 in the tray 18 by means conventional in the art. For example, when the workpiece is an FPC board, the shape and size of the trough 21 are designed according to the shape and size of the FPC board, and each trough 21 just accommodates one FPC board, the upper image pickup mechanism may be used to detect the appearance defect of the front surface of the FPC board, and the lower scanner 8 may be used to detect the appearance defect of the back surface of the FPC board. These defects may be defects such as whether or not foreign matter is present, whether or not the board surface is copper-leaking, whether or not the element is offset, and the like. Because the front and back sides of the FPC board may have different components, the specific detection content may be set according to conventional requirements in the art.

Further, as shown in fig. 1, in the present embodiment, the apparatus for inspecting a workpiece on a tray further includes an inspection rack, the inspection rack includes an outer frame 5, a top frame 15 connected to the top end of the frame 5, a bottom frame 12 connected to the bottom end of the frame 5, and a middle fixing frame 9, wherein the middle fixing frame 9 is connected to the frame 5 and is located below the tray conveying mechanism; wherein the tray conveying mechanism is connected with the frame 5, the camera shooting mechanism is connected with the frame 5 and the top frame 15, and the scanning device 8 is connected with the middle fixed frame 9.

Further, the detection frame is in a cube structure.

Specifically, the inspection rack includes four frames 5 arranged vertically. Four top frames 15 are arranged at the upper end positions among the four frames 5, and two ends of each top frame 15 are respectively connected with the upper ends of the two frames 5, and optionally, the top frames 15 and the frames 5 are fixedly connected through welding. Four underframes 12 are arranged at the lower end positions among the four frames 5, and two ends of each underframe 12 are respectively connected with the lower ends of the two frames 5, and optionally, the underframes 12 and the frames 5 are fixedly connected through welding. By adopting the technical scheme, the firmness of the detection rack can be enhanced.

Further, the four corners of the detection frame are provided with support foot pads 11 or casters.

Specifically, the four corners of the detection frame can be provided with the support foot pads 11 according to actual needs, the support foot pads 11 can enhance the stability of a device for detecting workpieces on a material tray, and the balance of the detection frame can be adjusted by adjusting the support foot pads 11; of course, casters may be provided at the four corners of the inspection rack to facilitate movement of the apparatus for inspecting workpieces on the tray.

Further, the image capturing mechanism includes a telescopic device for adjusting a distance between the image capturing unit 4 and the tray 18 in a first direction (as shown in an x direction in fig. 1) and the image capturing unit 4 connected to the telescopic device.

By adopting the technical scheme, the height of the shooting unit 4 can be adjusted in the first direction through the telescopic device according to the requirement, so that a workpiece is in the shooting range of the shooting unit, and the detection efficiency of the shooting mechanism is improved.

Alternatively, the image pickup unit 4 is a visual detection mechanism such as a visual detection camera. The visual detection mechanism is a mechanism for measuring and judging by using a machine instead of human eyes. The visual detection means that a captured target is converted into an image signal through a machine visual product (namely an image capturing device, namely a CMOS (complementary metal oxide semiconductor) and a CCD (charge coupled device)), and the image signal is transmitted to a special image processing system and converted into a digital signal according to pixel distribution, brightness, color and other information; the image system performs various operations on these signals to extract characteristics of the object, and further controls the operation of the on-site device according to the result of the discrimination. In the present utility model, the visual inspection mechanism may be selected among visual inspection mechanisms existing in the prior art.

Further, referring to fig. 1 and 3 in combination, the telescopic device includes a connection lug 2 and a push rod 1, wherein the connection lug 2 is connected with the camera unit 4, and the driving end of the push rod 1 is connected with the connection lug 2.

Specifically, be equipped with the collar 3 outward the camera unit 4, the outside of collar 3 is equipped with engaging lug 2, connects fixedly to camera unit 4 through collar 3 to the convenience is dismantled and assembled camera unit 4. The drive end of push rod 1 is connected with engaging lug 2, through the extension and the withdrawal of the drive end of push rod 1, can adjust the height of camera shooting unit 4 in first direction, and then adjusts the distance between camera shooting unit 4 and the charging tray 18 for charging tray 18 is in the detection scope of camera shooting unit 4.

Alternatively, the connection lugs 2 are ear plates extending from the outside of the cuff 3, and the connection lugs 2 may be integrally formed with the cuff 3 or fixedly connected to the cuff 3 by welding or the like. The connecting lug 2 is provided with a connecting hole for connecting with the push rod 1.

Alternatively, the push rod 1 may be one of an electric push rod, a hydraulic push rod, or a cylinder assembly. After the driving end of the push rod 1 is inserted through the connecting hole, the driving end of the push rod 1 is fixed with the connecting lug 2 through a fastener.

It should be noted that, the connecting lugs 2 and the push rods 1 are connected in a one-to-one correspondence, the number of the connecting lugs 2 and the number of the push rods 1 can be two, and the connecting lugs 2 and the push rods 1 are respectively and symmetrically arranged at two sides of the image pickup unit 4; of course, the number of the connecting lugs 2 and the pushing rods 1 can be more than three, and the number can be specifically set according to actual needs.

Specifically, as shown in fig. 3, in the present embodiment, an angle fixing frame 14 is provided inside the top corner of the detection frame, the push rod 1 is mounted on the angle fixing frame 14, and the angle fixing frame 14 is mounted on the frame 5 and the top frame 15, so that the push rod 1 is fixed on the top of the detection frame. The corner bracket 14 has a first side 141 connected to the frame 5 and a second side 142 connected to the top frame 15, the first and second sides 141 and 142 being perpendicular to each other. The first side 141 has a screw hole, and the first side 141 is fixedly coupled to the frame 5 by a bolt. Optionally, the fixed end of the push rod 1 is inlaid on the second edge 142, so as to facilitate the installation of the push rod 1. By adopting the technical scheme, the push rod 1 with proper specification can be selected according to actual needs, so that the detection rack has compatibility.

Further, the tray transfer mechanism includes:

a tray conveying rail 7 extending in a workpiece conveying direction (as shown in a y direction in fig. 1) and slidably connected to the tray 18;

a driving unit 19;

the transmission unit is connected with the driving end of the driving unit 19 and the tray 18 and is used for driving the tray 18 to move on the tray conveying guide rail 7 through the transmission unit under the driving of the driving unit 19.

Specifically, referring to fig. 1 and 2, the tray conveyance guide 7 is two guide rails disposed side by side in the workpiece conveyance direction. The tray conveyance rails 7 pass through the inside of the frame 5 and extend to the outside of the frame 5, respectively. In the workpiece conveying direction, the outer sides of the left side and the right side of the frame 5 are respectively provided with a supporting plate 6 for supporting a tray conveying guide rail 7, and the supporting plates 6 are fixedly connected to the frame 5 through bolts. Therefore, the supporting plate 6 can play a supporting role on the tray conveying guide rail 7, and the part of the tray conveying guide rail 7 in the detection rack is not provided with the supporting plate, so that the detection of the workpiece by the scanning device 8 is not influenced.

It should be noted that the sliding connection between the tray 18 and the tray conveying rail 7 may be implemented in a manner of the prior art, for example, the tray conveying rail 7 is configured as a chute, and the bottom of the tray 18 is provided with a slider, which is only for illustration and not limitation of the present utility model.

Alternatively, the drive unit 19 is a servo motor. Below the distal end of the one-sided pallet 6 is provided a motor mount 20, and the drive unit 19 is fixed to the distal end of the pallet 6 by means of the motor mount 20. The driving end of the driving unit 19 is connected with the transmission unit to drive the material tray 18 to reciprocate in the workpiece conveying direction, so that automatic feeding and discharging are realized.

Further, as shown in fig. 2, in the present embodiment, the transmission unit includes a screw 22 and a transmission wheel provided at one end of the screw 22, and the driving end of the driving unit 19 is connected to the transmission wheel through a transmission belt.

Specifically, the screw 22 extends in the workpiece conveying direction and is disposed between the two tray conveying rails 7 in parallel with the tray conveying rails 7. For fixing the screws 22, connecting brackets 26 are provided at both ends of the tray conveying rails 7, and alternatively, both ends of the connecting brackets 26 are respectively connected with the ends of the two tray conveying rails 7 by welding. One of the connection frames 26 is provided with a screw hole through which the screw 22 passes, the other connection frame 26 is provided with a bearing, one end of the screw 22 extends outward through the screw hole, and the other end is fixed to the connection frame 26 through the bearing. One end of the threaded rod 22 passing through the threaded hole is provided with a driving wheel 27, which driving wheel 27 is connected to the driving end of the driving unit 19 by means of a driving belt. When the driving end of the driving unit 19 rotates, the driving wheel is driven to rotate by the driving belt, so that the screw 22 is driven to rotate, and the tray 18 can be stably conveyed.

More specifically, a guide lug is provided at a position below the tray 18 where the screw 22 is connected, the guide lug being provided with an internally threaded hole through which the screw 22 is screwed with the guide lug, so that when the screw 22 rotates, the rotational movement of the screw 22 is changed into a linear movement of the tray 18 along the tray conveying rail 7, whereby the work can be stably conveyed.

Further, the scanning device 8 is an infrared camera. By adopting the technical scheme, the workpiece can be observed more clearly through the infrared camera, and twenty-four hours of monitoring can be realized on the workpiece.

Further, as shown in fig. 1 and 4, in the present embodiment, the scanning device 8 includes four infrared cameras, which are arranged in a rectangular shape below the tray conveyance mechanism. By adopting the technical scheme, the front and back of the workpiece in the conveying process can be detected simultaneously, and the detection efficiency is improved.

Specifically, a middle fixing frame 9 is provided below the tray conveying mechanism, the middle fixing frame 9 extends along the workpiece conveying direction (as shown in the y direction in fig. 1), both ends of the middle fixing frame 9 are provided with mounting heads 23, and the middle fixing frame 9 is mounted on the frame 5 through the mounting heads 23. It should be noted that the height of the middle fixing frame 9 may be set according to the actual detection requirement, which is not limited in the present utility model, so long as the scanning device 8 can scan the tray 18 from below.

The two middle fixing frames 9 are arranged, and reinforcing transverse plates 25 are arranged between the two middle fixing frames 9 and at the two ends of the middle fixing frames 9 respectively, so that the two reinforcing transverse plates 25 are arranged in the workpiece conveying direction, are positioned in the detection frame and are close to the feeding end and the discharging end of the detection frame respectively. Optionally, the reinforcing cross plate 25 is fixedly connected to the middle fixing frame 9 by welding. The reinforcing transverse plate 25 is provided with two mounting openings 24 in a dividing manner, and the scanning device 8 is mounted at each mounting opening 24. The scanning device 8 is thus connected to the central frame 9 by means of the reinforcing cross plate 25. Thus, four scanning devices 8 are provided below the tray transfer mechanism and arranged in a rectangular shape, so that the tray 18 can be scanned and detected.

Specifically, as shown in fig. 1, in the present embodiment, in order to enhance the stability of the connection between the middle fixing frame 9 and the frame 5, a first supporting frame 10 and a second supporting frame 16 extending in a first direction are respectively provided at the upper and lower sides of the middle fixing frame 9, wherein the top end of the first supporting frame 10 is connected to the top frame 15, the bottom end is connected to the middle fixing frame 9, the top end of the second supporting frame 16 is connected to the middle fixing frame 9, and the bottom end is connected to the bottom frame 12.

Further, the device for detecting the workpieces on the tray further comprises a control unit connected with the tray conveying mechanism, the camera mechanism and the scanning device 8 to control the operation of the tray conveying mechanism, the camera mechanism and the scanning device.

Further, the device for detecting the workpieces on the tray further comprises a display unit 17 connected with the control unit for displaying the results of the image pick-up mechanism and the scanning device 8.

Specifically, as shown in fig. 1, in the present embodiment, the display unit 17 is fixed to the top frame 15 for the convenience of observation.

Further, the device for detecting the workpieces on the material tray further comprises an alarm unit connected with the control unit and used for giving an alarm when abnormality occurs in the device so as to remind operators. Optionally, the alarm unit comprises an audible and visual alarm.

The working principle of the device for detecting the workpieces on the tray is as follows: when in use, the guide lugs below the material tray 18 are connected with the screw 22 and place the material tray 18 on the material tray conveying guide rail 7, and the driving unit 19 drives the screw 22 to rotate through the driving belt and the driving wheel 27, so that the material tray 18 is driven to move on the material tray conveying guide rail 7. When the tray 18 enters the detection rack, the height of the shooting unit 4 is adjusted through the push rod 1, so that a workpiece enters the shooting range of the shooting unit 4, the tray 18 is visually detected above the tray conveying mechanism through the shooting unit 4, and the detection result is displayed on the display unit 17; meanwhile, in the conveying process of the tray 18, the scanning device 8 arranged below the tray conveying mechanism scans the tray 18 and displays the scanning result on the display unit 17, so that the front and back detection can be simultaneously carried out, and the detection efficiency is improved.

In this embodiment, if some of the slots 21 on the tray 18 of a certain type are blocked by the screw 22 or the guide rail 7, during the detection, no workpiece may be placed in the slots 21, and only the workpiece to be detected is placed in the slots 21 without blocking, so as to ensure the accuracy of the detection.

According to the device for detecting the workpieces on the material tray, the driving unit drives the screw to rotate through the driving belt and the driving wheel, so that the material tray is driven to convey along the workpiece conveying direction, automatic feeding and discharging are realized, and the workpiece conveying stability is improved. Through setting up camera device in charging tray transport mechanism top and shooing the front of the work piece on the charging tray, scan the back of the work piece on the charging tray through the scanning device that transport mechanism below set up simultaneously, can carry out the detection of front and back simultaneously to the work piece to improve detection efficiency.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims

1. An apparatus for detecting workpieces on a tray, comprising:

the tray conveying mechanism is used for conveying the trays;

the scanning device is arranged below the tray conveying mechanism and is used for scanning workpieces on the tray.

2. The apparatus for detecting workpieces on a tray according to claim 1, wherein the image pickup mechanism includes a telescopic device for adjusting a distance between the image pickup unit and the tray in a first direction, and an image pickup unit connected to the telescopic device.

3. The apparatus for inspecting workpieces on a tray of claim 2, wherein the telescoping device comprises:

the connecting lug is connected with the camera unit;

the driving end of the push rod is connected with the connecting lug.

4. The device for detecting workpieces on a tray according to claim 3, wherein the number of the connecting lugs and the number of the push rods are two, the push rods are connected with the connecting lugs in a one-to-one correspondence manner, and the two pairs of the push rods and the connecting lugs are symmetrically arranged on two sides of the camera unit respectively.

5. The apparatus for inspecting workpieces on a tray of claim 1, wherein the tray transfer mechanism comprises:

a driving unit;

6. The apparatus for inspecting workpieces on a tray according to claim 5, wherein the driving unit comprises a screw and a driving wheel provided at one end of the screw, and the driving end of the driving unit is connected to the driving wheel through a driving belt.

7. The apparatus for inspecting workpieces on a tray of claim 1, further comprising a control unit coupled to the tray transfer mechanism, the camera mechanism, and the scanning device.

8. The apparatus for detecting workpieces on a tray according to claim 7, further comprising a display unit connected to the control unit for displaying results of the image pickup mechanism and the scanning device.

9. The apparatus for detecting workpieces on a tray according to claim 7, further comprising an alarm unit, wherein the alarm unit is connected to the control unit.

10. The apparatus for inspecting workpieces on a tray of claim 9, wherein the alarm unit comprises an audible and visual alarm.

11. The apparatus for inspecting workpieces on a tray of claim 1, wherein the scanning device is an infrared camera.

12. The apparatus for inspecting workpieces on a tray of claim 11, wherein the scanning device comprises four infrared cameras arranged in a rectangular pattern below the tray conveyor.

13. The apparatus for inspecting workpieces on a tray of claim 1, further comprising an inspection rack comprising an outer frame, a top frame connected to a top end of the frame, a bottom frame connected to a bottom end of the frame, and a middle fixed frame connected to the frame and positioned below the tray transfer mechanism; the tray conveying mechanism is connected with the frame, the camera shooting mechanism is connected with the frame and the top frame, and the scanning device is connected with the middle fixing frame.

14. The apparatus of claim 13, wherein the inspection rack is of a cubic configuration.

15. The apparatus of claim 14, wherein four corners of the inspection rack are provided with support foot pads or casters.