Flat workpiece detection equipment and detection method

Abstract

The present invention provides a flat workpiece detection device and detection method, wherein the flat workpiece detection device includes an air pump, a workpiece transport device, and an annular conveying device. The workpiece transport device includes a loading platform, a connecting plate, and a connecting air pipe. The bottom of the connecting plate is provided with a first connecting air hole, the side of the connecting plate is provided with a second connecting air hole, and the interior of the connecting plate is provided with a connecting air duct. The upper surface of the loading platform is provided with a loading adsorption hole, the side of the loading platform is provided with a loading air hole, and the interior of the loading platform is provided with a loading air duct. The annular conveying device includes a first conveying track and a second conveying track. The first conveying track and the second conveying track are both provided with a conveying adsorption hole, and the conveying adsorption hole can be connected to the first connecting air hole. The interior of the first conveying track and the second conveying track are both provided with a conveying air duct, and the conveying air duct is connected to the air pump, and the conveying adsorption hole is connected to the conveying air duct. The flat workpiece detection device and detection method of the present invention have more accurate detection results and higher detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of flat workpiece detection, and in particular to a flat workpiece detection device and a detection method. Background Art

[0002] For some flat workpieces, such as mobile phone back panels, laptop computer back panels, tablet computer back panels, power bank back panels, watch back panels, etc., their appearance needs to be inspected after production is completed. Generally, a visual inspection device is used to detect whether the appearance of the mobile phone back panel meets the requirements. For example, a CCD industrial camera is used to detect whether the mobile phone back panel has dirt, different color, glue overflow, light transmittance, concave and convex spots, etc.

[0003] In order to prevent the workpiece from deflecting, existing detection equipment uses suction to fix the workpiece. For example, the patent application with Chinese patent publication number CN221426489U discloses a mobile phone back panel detection device, in which a plurality of vertical air holes are provided in the middle of the fixed plate, and the lower end in the middle of the fixed plate is fixedly connected to the suction plate. Then, the user starts the air pump, and the air valve on the pipe at one end of the cylinder is in the open state. The air pump is connected to the suction plate through a vent pipe. At this time, the gas continuously flows downward from the upper end of the vertical air holes, so that the air flow at the upper end of the fixed plate is continuously sucked into the suction plate through the vertical air holes. During the process of continuous gas inhalation, the gas will fix the mobile phone back panel that falls in the middle of the upper end of the fixed plate, thereby achieving a certain fixing effect. However, this fixing method can only fix one workpiece at a time, and cannot achieve large-scale detection, and the detection efficiency is not high.

[0004] Therefore, how to ensure the fixing effect while also efficiently and in large quantities detecting flat workpieces is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] The first object of the present invention is to provide a flat workpiece detection device that can efficiently and in large quantities detect flat workpieces while ensuring a fixing effect, with more accurate detection results and higher detection efficiency.

[0006] A second object of the present invention is to provide a method for detecting a flat workpiece, which has more accurate detection results and higher detection efficiency.

[0007] In order to achieve the above first purpose, the present invention provides the following technical solutions:

[0008] Provided is a flat workpiece detection device, comprising:

[0009] Workbench;

[0010] air pump;

[0011] A workpiece transport device, wherein the number of the workpiece transport devices is multiple, the workpiece transport device includes a carrier, a connecting plate and a connecting air pipe, the bottom of the connecting plate is provided with a first connecting air hole, the side of the connecting plate is provided with a second connecting air hole, the interior of the connecting plate is provided with a connecting air channel, the connecting air channel is used to connect the first connecting air hole and the second connecting air hole, the upper surface of the carrier is provided with a carrier adsorption hole, the side of the carrier is provided with a carrier air hole, the interior of the carrier is provided with a carrier air channel, the carrier air channel is used to connect the carrier adsorption hole and the carrier air hole, and the carrier air hole is connected to the second connecting air hole through the connecting air pipe;

[0012] An annular conveying device, the annular conveying device includes a first conveying track, a second conveying track, a first conveying mechanism, a second conveying mechanism, a first track-changing mechanism and a second track-changing mechanism, the first conveying mechanism, the first track-changing mechanism, the second conveying mechanism and the second track-changing mechanism are sequentially arranged end to end on the workbench and can all convey the loading platform, the first conveying track is arranged on one side of the first conveying mechanism, the second conveying track is arranged on one side of the second conveying mechanism, the first conveying track and the second conveying track can both be used to support the connecting plate, the upper surface of the first conveying track and the upper surface of the second conveying track are both provided with a plurality of conveying adsorption holes, the plurality of conveying adsorption holes can be communicated with the first connecting air hole, the interior of the first conveying track and the second conveying track are both provided with a conveying air duct, the conveying air duct is communicated with the air pump, and the plurality of conveying adsorption holes are communicated with the conveying air duct;

[0013] A loading device, the loading device being provided on the workbench and located at the conveying starting end of the first conveying mechanism;

[0014] a material unloading device, the material unloading device being arranged on the workbench and located at the conveying end of the second conveying mechanism;

[0015] A detection device, the detection device is arranged on the workbench;

[0016] An industrial computer is electrically connected to the air pump, the annular conveyor, the loading device and the unloading device respectively.

[0017] According to the above scheme, when the worktable is transported on the first conveying mechanism and the second conveying mechanism, the detection device at each position can detect the appearance of the flat workpiece. The detection devices at different positions detect different indicators of the appearance of the flat workpiece. Starting from the flat workpiece entering the first detection device, the industrial computer encodes the serial number of each flat workpiece and records the data obtained by the detection devices at different positions of each flat workpiece in a one-to-one correspondence, thereby realizing the detection function. During the transportation of the worktable by the first conveying mechanism and the second conveying mechanism, the air at the worktable can pass through the load adsorption hole, the load air channel, the connecting air pipe, the connecting air channel and the conveying air channel in sequence and enter the air pump, thereby adsorbing the air at the worktable, that is, adsorbing and fixing the flat workpiece on the worktable, thereby fixing the flat workpiece. It can be understood that the worktable always has an adsorption force to adsorb the flat workpiece during the entire transportation process, thereby achieving a good fixing effect and making the detection result more accurate. In addition, by setting up an annular conveying device and providing multiple workpiece transport devices on the annular conveying device, multiple flat workpieces can be inspected at the same time, thereby enabling large-scale inspection of flat workpieces and higher inspection efficiency.

[0018] Optionally, the flat workpiece detection equipment also includes a positioning device, which is electrically connected to the industrial control computer; the positioning device includes a positioning seat, a first positioning plate, a second positioning plate, a third positioning plate, a fourth positioning plate, a first positioning drive unit and a second positioning drive unit, the positioning seat is arranged on the workbench and is located at the conveying starting end of the first conveying mechanism, the first positioning plate and the third positioning plate are relatively arranged on the positioning seat, the first positioning drive unit is connected to the first positioning plate to drive the first positioning plate close to or away from the third positioning plate, the second positioning plate and the fourth positioning plate are relatively arranged on the positioning seat, and the second positioning drive unit is connected to the second positioning plate to drive the second positioning plate close to or away from the fourth positioning plate.

[0019] Optionally, the loading device includes a loading conveyor belt, a loading seat, a loading plate, a first loading drive unit, a second loading drive unit and a loading suction cup. The loading conveyor belt is arranged on the workbench and is located on the side of the positioning seat away from the first conveying mechanism. The loading seat is arranged on the workbench. The first loading drive unit is arranged on the loading seat. The first loading drive unit is connected to the second loading drive unit to drive the second loading drive unit to move in the horizontal direction. The second loading drive unit is connected to the loading plate to drive the loading plate to move in the vertical direction. The loading plate is provided with two loading stations, and both of the loading stations are provided with the loading suction cup.

[0020] Optionally, the first conveying mechanism includes a first conveying seat, a first conveying belt, a first conveying drive unit, and a first conveying slide rail, wherein the first conveying seat is disposed on the workbench, the first conveying slide rail and the first conveying belt are both disposed on the first conveying seat, and the first conveying drive unit is connected to the first conveying belt;

[0021] The second conveying mechanism includes a second conveying seat, a second conveying belt, a second conveying drive unit, and a second conveying slide rail. The second conveying seat is arranged on the workbench. The second conveying slide rail and the second conveying belt are both arranged on the second conveying seat. The second conveying drive unit is connected to the second conveying belt.

[0022] The bottom of the loading platform is provided with a loading pulley and a loading conveying part, the loading pulley can be slidably connected to the first conveying slide rail and the second conveying slide rail, the first conveyor belt and the second conveyor belt are both toothed conveyor belts, and the loading conveying part is provided with loading conveying teeth, and the loading conveying teeth can be connected to the first conveyor belt and the second conveyor belt.

[0023] Optionally, the first conveying track is provided on a side of the first conveying seat away from the second conveying seat, and the second conveying track is provided on a side of the second conveying seat close to the first conveying seat;

[0024] The first track-changing mechanism includes a first track-changing seat, a first track-changing drive unit, a first track-changing plate, and a first track-changing slide rail. The first track-changing seat is provided on the workbench and is located at the conveying end of the first conveyor belt and the conveying start of the second conveyor belt. The first track-changing drive unit is provided on the first track-changing seat, the first track-changing drive unit is connected to the first track-changing plate, the first track-changing slide rail is provided on the first track-changing plate, and the loading pulley is slidably connected to the first track-changing slide rail.

[0025] The second track changing mechanism includes a second track changing seat, a second track changing drive unit, a second track changing plate and a second track changing slide rail. The second track changing seat is arranged on the workbench and is located at the conveying end of the second conveyor belt and the conveying starting end of the first conveyor belt. The second track changing drive unit is arranged on the second track changing seat. The second track changing drive unit is connected to the second track changing plate. The second track changing slide rail is arranged on the second track changing plate. The loading pulley can be slidably connected to the second track changing slide rail.

[0026] Optionally, the first track-changing mechanism further includes a first track-changing detection unit, a first track-changing blocking column, and a first track-changing blocking cylinder, wherein the first track-changing detection unit is provided on the first track-changing plate, the first track-changing detection unit is electrically connected to the industrial control unit, the first track-changing blocking cylinder is provided on the first track-changing plate, and the first track-changing blocking cylinder is connected to the first track-changing blocking column to drive the first track-changing blocking column to move in a vertical direction;

[0027] The second track change mechanism also includes a second track change detection unit, a second track change blocking column and a second track change blocking cylinder. The second track change detection unit is arranged on the second track change plate. The second track change detection unit is electrically connected to the industrial control machine. The second track change blocking cylinder is arranged on the second track change plate. The second track change blocking cylinder is connected to the second track change blocking column to drive the second track change blocking column to move in the vertical direction.

[0028] Optionally, the flat workpiece detection equipment also includes a limit device, which is electrically connected to the industrial control computer, and the limit device is provided on the first conveying seat and the second conveying seat; the limit device includes a limit seat, a limit cylinder, a limit detection unit, a limit plate and a limit roller, the limit cylinder and the limit detection unit are arranged on the limit seat, the limit cylinder is connected to the limit plate to drive the limit plate to move in the vertical direction, the limit roller is rotatably connected to the limit plate, and the loading platform is provided with a loading limit groove adapted to the limit roller.

[0029] Optionally, the upper surface of the loading platform is provided with a loading positioning block and multiple loading limit blocks, the multiple loading limit blocks are arranged around the loading positioning block, the loading positioning block is provided with multiple loading adsorption grooves, the multiple loading adsorption grooves can all be connected to the loading adsorption holes, and the loading adsorption holes are located on the bottom surface of the loading adsorption grooves.

[0030] Optionally, the unloading device includes an unloading conveyor belt, an unloading seat, an unloading plate, a first unloading drive unit, a second unloading drive unit, an unloading suction cup and a waste conveyor belt. The unloading conveyor belt and the waste conveyor belt are both arranged on the workbench and are both located at the conveying end of the second conveying mechanism. The unloading seat is arranged on the workbench, the first unloading drive unit is arranged on the unloading seat, the first unloading drive unit and the second unloading drive unit drive the second unloading drive unit to move in the horizontal direction, the second unloading drive unit is connected to the unloading plate to drive the unloading plate to move in the vertical direction, and the unloading plate is provided with the unloading suction cup.

[0031] In order to achieve the above second objective, the present invention provides the following technical solutions:

[0032] A method for detecting a flat workpiece is provided, which uses the above-mentioned flat workpiece detection device and includes the following steps:

[0033] S1. The first loading drive unit drives the second loading drive unit to drive the loading plate to move to the conveying end of the loading conveyor belt. The loading conveyor belt conveys the flat workpiece to be inspected to the bottom of the loading plate. The second loading drive unit drives the loading plate to move downward. The loading suction cup picks up the flat workpiece and then moves the flat workpiece to the positioning seat.

[0034] S2. After the flat workpiece is placed on the positioning seat, the first positioning drive unit drives the first positioning plate to push the flat workpiece toward the third positioning plate, and the second positioning drive unit drives the second positioning plate to push the flat workpiece to be inspected toward the fourth positioning plate, so that the flat workpiece is confined to a specified area. The loading suction cup of one of the loading stations of the loading plate absorbs the flat workpiece in the defined position, and the loading suction cup of another loading station of the loading plate can simultaneously absorb the flat workpiece on the loading conveyor. When the flat workpiece in the defined position is transported to the first conveying mechanism, the flat workpiece on the loading conveyor can be transported to the positioning seat.

[0035] S3. The first conveyor belt transports the loading platform to the first track-changing mechanism. During the transport process, the air pump is kept on. The air at the loading platform can pass through the loading suction hole, the loading air channel, the connecting air pipe, the connecting air channel, and the conveying air channel and enter the air pump, thereby absorbing the air at the loading platform and fixing the flat workpiece on the loading platform.

[0036] S4. When the worktable is transported on the first conveying mechanism and the second conveying mechanism, the inspection device at each position can inspect the appearance of the flat workpiece. The inspection devices at different positions inspect different indicators of the flat workpiece's appearance. From the time the flat workpiece enters the first inspection device, the industrial computer encodes a serial number for each flat workpiece and records the data obtained by the inspection devices at different positions of each flat workpiece in a one-to-one correspondence. Qualified workpieces are recorded as good products, and unqualified workpieces are recorded as scrap.

[0037] S5. When the carrier is transported to the first track-changing mechanism, the first conveyor belt transports the carrier from the first conveying slide rail to the first track-changing slide rail. The first track-changing drive unit drives the first track-changing plate to move the flat workpiece to the conveying starting end of the second conveyor belt and connects the carrier's conveying teeth to the surface of the second conveyor belt. The second conveyor belt transports the carrier to the unloading device. The first track-changing drive unit drives the first track-changing plate to move to the conveying end of the first conveyor belt.

[0038] S6. The second conveyor belt transports the worktable to the second track-changing mechanism. The first unloading drive unit drives the second unloading drive unit to drive the unloading plate to the conveying end of the second conveyor belt. The second unloading drive unit drives the unloading plate to move downward. The unloading suction cup picks up the flat workpiece and then moves the flat workpiece recorded as good to the unloading conveyor belt. The flat workpiece recorded as defective is moved to the waste collection area.

[0039] S7. After the flat workpiece on the loading platform is transported away, the second conveyor belt transports the loading platform from the second conveying slide rail to the second track-changing slide rail. The second track-changing drive unit drives the second track-changing plate to move the loading platform to the conveying starting end of the first conveyor belt and connects the loading conveying teeth of the loading platform to the surface of the first conveyor belt. The first conveyor belt continues to transport the loading platform. The second track-changing drive unit drives the second track-changing plate to move to the conveying end of the second conveyor belt, thereby completing the detection of the flat workpiece.

[0040] Compared with the prior art, the solution of the present invention has the following advantages:

[0041] 1. In the flat workpiece detection equipment of the present invention, when the worktable is transported on the first conveying mechanism and the second conveying mechanism, the detection device at each position can detect the appearance of the flat workpiece, and the detection devices at different positions detect different indicators of the appearance of the flat workpiece. Starting from the flat workpiece entering the first detection device, the industrial computer encodes the serial number of each flat workpiece, and records the data obtained by the detection devices at different positions of each flat workpiece one by one, thereby realizing the detection function. In the process of the worktable being transported by the first conveying mechanism and the second conveying mechanism, the air at the worktable can pass through the load adsorption hole, the load air duct, the connecting air pipe, the connecting air duct and the conveying air duct in sequence and enter the air pump, thereby being able to adsorb the air at the worktable, that is, the flat workpiece can be adsorbed and fixed on the worktable, thereby being able to fix the flat workpiece. It can be understood that the worktable always has the adsorption force to adsorb the flat workpiece during the entire conveying process, thereby being able to achieve a good fixing effect, making the detection result more accurate. In addition, by providing an annular conveying device, a plurality of workpiece transport devices are provided on the annular conveying device, so that a plurality of flat workpieces can be inspected at the same time, thereby being able to inspect the flat workpieces in large quantities, and the inspection efficiency is higher.

[0042] 2. In the flat workpiece detection method of the present invention, the above-mentioned flat workpiece detection equipment is used to detect the flat workpiece, and the detection result is more accurate and the detection efficiency is higher.

[0043] Additional aspects and advantages of the present invention will be set forth in part in the following description, will become apparent from the following description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0045] Figure 1 A schematic structural diagram of a flat workpiece detection device in one embodiment of the present invention;

[0046] Figure 2 A top view of a flat workpiece detection device according to an embodiment of the present invention;

[0047] Figure 3 Schematic diagram of the structure of a workpiece transport device and an annular conveying device in one embodiment of the present invention;

[0048] Figure 4 A schematic structural diagram of a workpiece transport device and an annular conveying device in an embodiment of the present invention from another angle;

[0049] Figure 5 Schematic diagram of the structure of a workpiece transport device and a first conveying mechanism in one embodiment of the present invention;

[0050] Figure 6 is a side view of a workpiece transport device and a first conveying mechanism in one embodiment of the present invention;

[0051] Figure 7 Schematic diagram of the structure of a workpiece transport device in one embodiment of the present invention;

[0052] Figure 8 2 is a schematic structural diagram of a first track-changing mechanism in an embodiment of the present invention;

[0053] Figure 9 is a schematic structural diagram of a positioning device in an embodiment of the present invention;

[0054] Figure 10 It is a schematic structural diagram of a loading device and a unloading device in one embodiment of the present invention.

[0055] Reference numerals: 1, workbench; 2, workpiece transport device; 21, loading platform; 211, loading adsorption hole; 212, loading air hole; 213, loading limiting groove; 22, connecting plate; 221, first connecting air hole; 222, second connecting air hole; 223, connecting groove; 23, loading pulley; 24, loading conveying portion; 25, loading conveying gear; 26, loading positioning block; 27, loading limiting block; 28, loading adsorption groove; 3, annular conveying device; 31, first conveying track; 32. Second conveyor track; 33. First conveyor mechanism; 331. First conveyor seat; 332. First conveyor belt; 333. First conveyor drive unit; 334. First conveyor slide; 34. Second conveyor mechanism; 341. Second conveyor seat; 342. Second conveyor belt; 343. Second conveyor drive unit; 344. Second conveyor slide; 35. First track-changing mechanism; 351. First track-changing seat; 352. First track-changing drive unit; 353. First track-changing plate; 354. 1. Track-changing slide rail; 355. First track-changing detection unit; 356. First track-changing blocking column; 357. First track-changing blocking cylinder; 36. Second track-changing mechanism; 37. Conveying adsorption hole; 4. Loading device; 41. Loading conveyor belt; 42. Loading seat; 43. Loading plate; 44. First loading drive unit; 45. Second loading drive unit; 46. Loading suction cup; 5. Unloading device; 51. Unloading conveyor belt; 52. Unloading seat; 53. Unloading plate; 54. First unloading drive unit Element; 55. Second unloading drive unit; 56. Unloading suction cup; 57. Waste conveyor belt; 6. Detection device; 7. Positioning device; 71. Positioning seat; 72. First positioning plate; 73. Second positioning plate; 74. Third positioning plate; 75. Fourth positioning plate; 76. First positioning drive unit; 77. Second positioning drive unit; 8. Limiting device; 81. Limiting seat; 82. Limiting cylinder; 83. Limiting detection unit; 84. Limiting plate; 85. Limiting roller; 9. Flat workpiece. DETAILED DESCRIPTION

[0056] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0057] like Figures 1 to 10 As shown, the present invention provides a flat workpiece detection device, which is mainly used to detect flat workpieces, such as the back panel of a mobile phone, to detect whether the back panel of the mobile phone is dirty, discolored, has glue overflow, is light-transmitting, has concave and convex spots, etc.

[0058] The flat workpiece detection device provided in this embodiment includes a workbench 1, an air pump, a workpiece transport device 2, a ring conveying device 3, a loading device 4, an unloading device 5, a detection device 6 and an industrial computer.

[0059] For the convenience of explanation, in this embodiment, each direction is as follows Figure 1 shown.

[0060] Specifically, if Figure 1 and Figure 2 As shown, there are multiple workpiece transport devices 2, and the workpiece transport device 2 includes a carrier 21, a connecting plate 22 and a connecting air pipe, wherein the connecting air pipe is not shown in the drawings, a first connecting air hole 221 is provided at the bottom of the connecting plate 22, a second connecting air hole 222 is provided on the side of the connecting plate 22, a connecting air duct is provided inside the connecting plate 22, and the connecting air duct is used to connect the first connecting air hole 221 and the second connecting air hole 222, a carrier adsorption hole 211 is provided on the upper surface of the carrier 21, a carrier air hole 212 is provided on the side of the carrier 21, a carrier air duct is provided inside the carrier 21, and the carrier air duct is used to connect the carrier adsorption hole 211 and the carrier air hole 212, and the carrier air hole 212 is connected to the second connecting air hole 222 through the connecting air pipe.

[0061] Furthermore, if Figures 1 to 4 As shown, the annular conveying device 3 includes a first conveying track 31, a second conveying track 32, a first conveying mechanism 33, a second conveying mechanism 34, a first track changing mechanism 35 and a second track changing mechanism 36. The first conveying mechanism 33, the first track changing mechanism 35, the second conveying mechanism 34 and the second track changing mechanism 36 are arranged end to end on the workbench 1 and can all convey the workbench 21.

[0062] Furthermore, the loading device 4 transports the flat workpiece 9 from left to right to the first conveying mechanism 33, the first conveying mechanism 33 transports the flat workpiece 9 from left to right to the first track changing mechanism 35, the first track changing mechanism 35 transports the flat workpiece 9 from front to back to the second conveying mechanism 34, the second conveying mechanism 34 transports the flat workpiece 9 from right to left to the second track changing mechanism 36, the second track changing mechanism 36 transports the worktable 21 from back to front to the first conveying mechanism 33, and the unloading device 5 takes the flat workpiece 9 from the second conveying mechanism 34 from right to left, thereby forming a ring-shaped conveying device that can circulate the worktable 21, so that multiple flat workpieces 9 can be inspected at the same time, that is, the flat workpieces 9 can be inspected in batches, and the inspection efficiency is higher.

[0063] Specifically, if Figures 1 to 6As shown, the first conveying track 31 is arranged on the front side of the first conveying mechanism 33, and the second conveying track 32 is arranged on the front side of the second conveying mechanism 34. The first conveying track 31 and the second conveying track 32 can both be used to support the connecting plate 22. The upper surface of the first conveying track 31 and the upper surface of the second conveying track 32 are both provided with multiple conveying adsorption holes 37, and the multiple conveying adsorption holes 37 can all be connected with the first connecting air hole 221. The interior of the first conveying track 31 and the second conveying track 32 are both provided with conveying air ducts, which are connected with the air pump, and the multiple conveying adsorption holes 37 are all connected with the conveying air ducts.

[0064] In some embodiments, as Figures 5 to 7 As shown, a connecting groove 223 is provided at the bottom of the connecting plate 22, and the connecting groove 223 is connected to the first connecting air hole 221. The connecting groove 223 can be connected to the conveying adsorption hole 37, which can better connect the first connecting air hole 221 and the conveying adsorption hole 37, ensuring that no matter where the connecting plate 22 moves, it can be connected to the conveying adsorption hole 37.

[0065] Furthermore, the loading device 4 is provided on the workbench 1 and is located at the conveying starting end of the first conveying mechanism 33, the unloading device 5 is provided on the workbench 1 and is located at the conveying end of the second conveying mechanism 34, the detection device 6 is provided on the workbench 1, and the industrial computer is electrically connected to the air pump, the annular conveying device, the loading device 4 and the unloading device 5 respectively.

[0066] In this embodiment, when the worktable 21 is transported on the first conveying mechanism 33 and the second conveying mechanism 34, the detection device 6 at each position can detect the appearance of the flat workpiece 9. The detection devices 6 at different positions detect different indicators of the appearance of the flat workpiece 9. Starting from the flat workpiece 9 entering the first detection device 6, the industrial computer serially encodes each flat workpiece 9 and records the data obtained by the detection devices 6 at different positions of each flat workpiece 9 one by one, thereby realizing the detection function.

[0067] Specifically, during the transportation of the carrier 21 by the first conveying mechanism 33 and the second conveying mechanism 34, the air at the carrier 21 can enter the air pump through the carrier adsorption hole 211, the carrier air duct, the connecting air pipe, the connecting air duct and the transporting air duct in sequence, thereby adsorbing the air at the carrier 21, that is, the flat workpiece 9 can be adsorbed and fixed on the carrier 21, thereby fixing the flat workpiece 9. It can be understood that since there are multiple transport adsorption holes 37 on the first transport track 31 and the second transport track 32, the carrier 21 can be adsorbed during the entire transportation process. During the process, the first connecting air hole 221 at the bottom of the connecting plate 22 can always be connected to at least one conveying adsorption hole 37, that is, it ensures that the carrier adsorption hole 211 on the carrier 21 can always be connected to the air pump, and the carrier adsorption hole 211 of the carrier 21 always has the adsorption force to adsorb the flat workpiece 9, thereby achieving a good fixing effect. No matter which detection device 6 the carrier 21 moves to, the flat workpiece 9 on the carrier 21 can always be adsorbed and fixed, ensuring that the detection device 6 can accurately detect the flat workpiece 9 on the carrier 21, and the detection result is more accurate.

[0068] In addition, by providing an annular conveying device 3 on which a plurality of workpiece transport devices 2 are provided, a plurality of flat workpieces 9 can be inspected simultaneously, thereby enabling large-scale inspection of flat workpieces 9 with higher inspection efficiency.

[0069] In addition, in this embodiment, a plurality of detection devices 6 are provided on the workbench 1. The detection devices 6 include a CCD industrial camera and a light source, etc., which can detect different indicators of the flat workpiece 9. The specific selection and placement of the detection devices 6 can be selected according to actual conditions, and will not be described here one by one.

[0070] In some embodiments, as Figure 9 As shown, the flat workpiece detection equipment also includes a positioning device 7, which is electrically connected to the industrial control machine; the positioning device 7 includes a positioning seat 71, a first positioning plate 72, a second positioning plate 73, a third positioning plate 74, a fourth positioning plate 75, a first positioning drive unit 76 and a second positioning drive unit 77, the positioning seat 71 is arranged on the workbench 1 and is located at the conveying starting end of the first conveying mechanism 33, the first positioning plate 72 and the third positioning plate 74 are relatively arranged on the positioning seat 71, the first positioning drive unit 76 is connected to the first positioning plate 72 to drive the first positioning plate 72 to approach or move away from the third positioning plate 74, the second positioning plate 73 and the fourth positioning plate 75 are relatively arranged on the positioning seat 71, and the second positioning drive unit 77 is connected to the second positioning plate 73 to drive the second positioning plate 73 to approach or move away from the fourth positioning plate 75.

[0071] Specifically, the first positioning plate 72 is located at the front side of the positioning seat 71, the second positioning plate 73 is located on the left side of the positioning seat 71, the third positioning plate 74 is located at the rear side of the positioning seat 71, and the fourth positioning plate 75 is located on the right side of the positioning seat 71. The first positioning plate 72, the second positioning plate 73, the third positioning plate 74 and the fourth positioning plate 75 form a specified area for placing the flat workpiece 9. The placement posture of the flat workpiece 9 in the loading device 4 is inconsistent. After the flat workpiece 9 is placed on the positioning seat 71, the first positioning drive unit 76 drives the first positioning plate 72 to push the flat workpiece 9 backward, and the second positioning drive unit 77 drives the second positioning plate 73 to push the flat workpiece 9 to be inspected to the right, so that the flat workpiece 9 is confined to the specified area, so that each flat workpiece 9 can be kept in the same placement posture, and then placed on the worktable 21, so that each flat workpiece 9 can be kept in the same placement posture and go to each detection device 6, with higher detection accuracy.

[0072] In some embodiments, the first positioning drive unit 76 is a linear cylinder, and the second positioning drive unit 77 is a linear module.

[0073] In some embodiments, as Figure 10 As shown, the loading device 4 includes a loading conveyor belt 41, a loading seat 42, a loading plate 43, a first loading drive unit 44, a second loading drive unit 45 and a loading suction cup 46. The loading conveyor belt 41 is arranged on the workbench 1 and is located on the side of the positioning seat 71 away from the first conveying mechanism 33. The loading seat 42 is arranged on the workbench 1. The first loading drive unit 44 is arranged on the loading seat 42. The first loading drive unit 44 and the second loading drive unit 45 drive the second loading drive unit 45 to move in the horizontal direction. The second loading drive unit 45 is connected to the loading plate 43 to drive the loading plate 43 to move in the vertical direction. The loading plate 43 is provided with two loading stations, and the two loading stations are provided with a loading suction cup 46.

[0074] Specifically, during loading, the loading suction cup 46 of the loading station on the right side of the loading plate 43 absorbs the flat workpiece 9 in a defined position, and the loading suction cup 46 of the loading station on the left side of the loading plate 43 can simultaneously absorb the flat workpiece 9 on the loading conveyor 41. While the flat workpiece 9 in a defined position is transported to the first conveying mechanism 33, the flat workpiece 9 on the loading conveyor 41 can be transported to the positioning seat 71. The same action can complete the transportation of two flat workpieces 9, which is more efficient.

[0075] In some embodiments, the first loading drive unit 44 is a linear module, and the second loading drive unit 45 is a linear cylinder.

[0076] In some embodiments, as Figures 1 to 7As shown, the first conveying mechanism 33 includes a first conveying seat 331, a first conveying belt 332, a first conveying drive unit 333, and a first conveying slide 334. The first conveying seat 331 is arranged on the workbench 1, the first conveying slide 334 and the first conveying belt 332 are both arranged on the first conveying seat 331, and the first conveying drive unit 333 is connected to the first conveying belt 332; the second conveying mechanism 34 includes a second conveying seat 341, a second conveying belt 342, a second conveying drive unit 343, and a second conveying slide 344. The second conveying seat 341 is arranged on the workbench 1, and the first conveying slide 334 and the first conveying belt 332 are both arranged on the first conveying seat 331. Platform 1, the second conveying slide 344 and the second conveyor belt 342 are all arranged on the second conveying seat 341, and the second conveying drive unit 343 is connected to the second conveyor belt 342; the bottom of the loading platform 21 is provided with a loading pulley 23 and a loading conveying part 24, the loading pulley 23 can be slidably connected to the first conveying slide 334 and the second conveying slide 344, the first conveyor belt 332 and the second conveyor belt 342 are both toothed conveyor belts, and the loading conveying part 24 is provided with a loading conveying tooth 25, and the loading conveying tooth 25 can be connected to the first conveyor belt 332 and the second conveyor belt 342.

[0077] Specifically, the toothed conveyor belt cooperates with the load conveying teeth 25 for conveying, and the conveying is smoother and more stable. The first conveying slide 334 and the second conveying slide 344 can play a certain role in supporting the load platform 21. By setting the load pulley 23 in cooperation with the two conveying slides, the stability and smoothness of the load platform 21 during movement can be improved, further improving the detection efficiency.

[0078] In some embodiments, the first conveying drive unit 333 and the second conveying drive unit 343 are both motors, which respectively drive the first conveying belt 332 and the second conveying belt 342 to rotate through transmission gears.

[0079] In some embodiments, the first conveying track 31 is arranged on the side of the first conveying seat 331 away from the second conveying seat 341, and the second conveying track 32 is arranged on the side of the second conveying seat 341 close to the first conveying seat 331, that is, the first conveying track 31 is arranged on the front side of the first conveying mechanism 33, and the second conveying track 32 is arranged on the front side of the second conveying mechanism 34.

[0080] Furthermore, if Figure 8As shown, the first track-changing mechanism 35 includes a first track-changing seat 351, a first track-changing drive unit 352, a first track-changing plate 353 and a first track-changing slide 354. The first track-changing seat 351 is provided on the workbench 1 and is located at the conveying end of the first conveyor belt 332 and the conveying start of the second conveyor belt 342. The first track-changing drive unit 352 is provided on the first track-changing seat 351, the first track-changing drive unit 352 is connected to the first track-changing plate 353, and the first track-changing slide 354 is provided on the first track-changing plate 353. The pulley 23 can be slidably connected to the first track changing slide 354; the second track changing mechanism 36 includes a second track changing seat, a second track changing drive unit, a second track changing plate and a second track changing slide. The second track changing seat is arranged on the workbench 1 and is located at the conveying end of the second conveyor belt 342 and the conveying starting end of the first conveyor belt 332. The second track changing drive unit is arranged on the second track changing seat, the second track changing drive unit is connected to the second track changing plate, the second track changing slide is arranged on the second track changing plate, and the loading pulley 23 can be slidably connected to the second track changing slide.

[0081] Specifically, when the carrier 21 is transported to the first track-changing mechanism 35, the first conveyor belt 332 transports the carrier 21 from the first conveying slide 334 to the first track-changing slide 354 to complete the transition, the first track-changing drive unit 352 drives the first track-changing plate 353 to drive the flat workpiece 9 to move to the conveying starting end of the second conveyor belt 342 and connects the carrier conveying teeth 25 of the carrier 21 to the surface of the second conveyor belt 342, the second conveyor belt 342 transports the carrier 21 to the unloading device 5, the first track-changing drive unit 352 drives the first track-changing plate 353 to move to the conveying end of the first conveyor belt 332 and then transports the next carrier 21, and the carrier 2 located at the conveying end of the second conveyor belt 342 After the flat workpiece 9 on 1 is transported away, the second conveyor belt 342 transports the worktable 21 from the second conveying slide 344 to the second track-changing slide, and the second track-changing drive unit drives the second track-changing plate to drive the worktable 21 to move to the conveying starting end of the first conveyor belt 332 and connects the load conveying teeth 25 of the worktable 21 to the surface of the first conveyor belt 332. The first conveyor belt 332 continues to convey the worktable 21, and the second track-changing drive unit drives the second track-changing plate to move to the conveying end of the second conveyor belt 342 and then transports the next worktable 21. The worktable 21 is transported back and forth in this way to form an annular conveying device, so that the flat workpieces 9 can be inspected in large quantities with higher inspection efficiency.

[0082] In some embodiments, the first track-changing drive unit 352 and the second track-changing drive unit are both linear modules.

[0083] In some embodiments, the first track-changing seat 351 is also provided with a conveying adsorption hole 37 to ensure that the loading platform 21 still has good adsorption force when in the first track-changing mechanism 35 .

[0084] In some embodiments, as Figure 8 As shown, the first track-changing mechanism 35 also includes a first track-changing detection unit 355, a first track-changing blocking column 356 and a first track-changing blocking cylinder 357. The first track-changing detection unit 355 is arranged on the first track-changing plate 353, and the first track-changing detection unit 355 is electrically connected to the industrial control machine. The first track-changing blocking cylinder 357 is arranged on the first track-changing plate 353, and the first track-changing blocking cylinder 357 is connected to the first track-changing blocking column 356 to drive the first track-changing blocking column 356 to move in the vertical direction; the second track-changing mechanism 36 also includes a second track-changing detection unit, a second track-changing blocking column and a second track-changing blocking cylinder. The second track-changing detection unit is arranged on the second track-changing plate, and the second track-changing detection unit is electrically connected to the industrial control machine. The second track-changing blocking cylinder is arranged on the second track-changing plate, and the second track-changing blocking cylinder is connected to the second track-changing blocking column to drive the second track-changing blocking column to move in the vertical direction.

[0085] Specifically, the first track change detection unit 355 and the second track change detection unit are both used to detect the position of the carrier 21. When there is a carrier 21 on the first track change plate 353, the first track change blocking cylinder 357 drives the first track change blocking column 356 to move upward and block the carrier 21, so that the carrier 21 remains in a fixed position. Similarly, when there is a carrier 21 on the second track change plate, the second track change blocking cylinder drives the second track change blocking column to move upward and block the carrier 21, so that the carrier 21 remains in a fixed position, and the track change work can be completed more smoothly and accurately.

[0086] In some embodiments, the first track-changing detection unit 355 and the second track-changing detection unit are both photoelectric switches.

[0087] In some embodiments, as Figure 4 As shown, the flat workpiece detection equipment also includes a limit device 8, which is electrically connected to the industrial control machine, and a limit device 8 is provided on the first conveying seat 331 and the second conveying seat 341; the limit device 8 includes a limit seat 81, a limit cylinder 82, a limit detection unit 83, a limit plate 84 and a limit roller 85, the limit cylinder 82 and the limit detection unit 83 are arranged on the limit seat 81, the limit cylinder 82 is connected to the limit plate 84 to drive the limit plate 84 to move in the vertical direction, the limit roller 85 is rotatably connected to the limit plate 84, and the loading platform 21 is provided with a loading limit groove 213 adapted to the limit roller 85.

[0088] Specifically, the detection position of the detection device 6 is fixed after installation, and the positions of the limit device 8 and the detection device 6 correspond one to one. When the limit detection unit 83 detects that the worktable 21 has reached the detection position, the limit cylinder 82 drives the limit plate 84 to move upward, driving the limit roller 85 to enter the worktable limit groove 213, which can prevent the worktable 21 from continuing to move, so that the flat workpiece 9 on the worktable 21 can be maintained in the detection position, thereby improving the accuracy of the detection. By setting the limit roller 85 to limit the movement of the worktable 21, damage to the worktable 21 can be prevented.

[0089] In some embodiments, the limit detection unit 83 is a photoelectric switch.

[0090] In some embodiments, as Figure 5 As shown, the upper surface of the loading platform 21 is provided with a loading positioning block 26 and multiple loading limit blocks 27. The multiple loading limit blocks 27 are arranged around the loading positioning block 26. The loading positioning block 26 is provided with multiple loading adsorption grooves 28. The multiple loading adsorption grooves 28 can all be connected to the loading adsorption holes 211. The loading adsorption holes 211 are located on the bottom surface of the loading adsorption grooves 28.

[0091] Specifically, the load positioning block 26 is located in the middle of the load platform 21, and multiple load limiting blocks 27 are distributed around the load positioning block 26, thereby forming a placement area for the flat workpiece 9. By setting a protruding load positioning block 26, it can better adapt to flat workpieces 9 with grooves such as the back panel of a mobile phone, so that the load adsorption hole 211 is closer to the flat workpiece 9, the adsorption effect is better, and the fixing effect is better.

[0092] In some embodiments, as shown in 10, the unloading device 5 includes an unloading conveyor belt 51, an unloading seat 52, an unloading plate 53, a first unloading drive unit 54, a second unloading drive unit 55, an unloading suction cup 56 and a waste conveyor belt 57. The unloading conveyor belt 51 and the waste conveyor belt 57 are both arranged on the workbench 1 and are both located at the conveying end of the second conveying mechanism 34. The unloading seat 52 is arranged on the workbench 1, the first unloading drive unit 54 is arranged on the unloading seat 52, the first unloading drive unit 54 and the second unloading drive unit 55 drive the second unloading drive unit 55 to move in the horizontal direction, the second unloading drive unit 55 is connected to the unloading plate 53 to drive the unloading plate 53 to move in the vertical direction, and the unloading plate 53 is provided with an unloading suction cup 56.

[0093] Specifically, the second conveyor belt 342 transports the worktable 21 to the second track changing mechanism 36, the first unloading drive unit 54 drives the second unloading drive unit 55 to drive the unloading plate 53 to move to the conveying end of the second conveyor belt 342, the second unloading drive unit 55 drives the unloading plate 53 to move downward, the unloading suction cup 56 sucks the flat workpiece 9, and then transports the flat workpiece 9 recorded as a good product to the unloading conveyor belt, and transports the flat workpiece 9 recorded as a waste product to the waste conveyor belt 57, which increases work efficiency.

[0094] In some embodiments, the first blanking drive unit 54 is a linear module, and the second blanking drive unit 55 is a linear cylinder.

[0095] The present invention also provides a flat workpiece detection method, which uses the above-mentioned flat workpiece detection device and includes the following steps:

[0096] S1: The first loading drive unit 44 drives the second loading drive unit 45 to drive the loading plate 43 to move to the conveying end of the loading conveyor belt 41. The loading conveyor belt 41 conveys the flat workpiece 9 to be inspected to the bottom of the loading plate 43. The second loading drive unit 45 drives the loading plate 43 to move downward. The loading suction cup 46 picks up the flat workpiece 9 and then moves the flat workpiece 9 to the positioning seat 71.

[0097] S2. After the flat workpiece 9 is placed on the positioning seat 71, the first positioning drive unit 76 drives the first positioning plate 72 to push the flat workpiece 9 in the direction of the third positioning plate 74, and the second positioning drive unit 77 drives the second positioning plate 73 to push the flat workpiece 9 to be detected in the direction of the fourth positioning plate 75, so that the flat workpiece 9 is confined to the specified area. The loading suction cup 46 of one of the loading stations of the loading plate 43 absorbs the flat workpiece 9 in the defined position, and the loading suction cup 46 of the other loading station of the loading plate 43 can simultaneously absorb the flat workpiece 9 on the loading conveyor belt 41. When the flat workpiece 9 in the defined position is transported to the first conveying mechanism 33, the flat workpiece 9 on the loading conveyor belt 41 can be transported to the positioning seat 71.

[0098] S3. The first conveyor belt 332 conveys the loading platform 21 to the first track-changing mechanism 35. During the conveying process, the air pump is kept on. The air at the loading platform 21 can pass through the loading suction hole 211, the loading air channel, the connecting air pipe, the connecting air channel, and the conveying air channel and enter the air pump, thereby absorbing the air at the loading platform 21 and fixing the flat workpiece 9 on the loading platform 21.

[0099] S4. When the stage 21 is transported on the first conveying mechanism 33 and the second conveying mechanism 34, the inspection device 6 at each position can inspect the appearance of the flat workpiece 9. The inspection devices 6 at different positions inspect different indicators of the appearance of the flat workpiece 9. From the time the flat workpiece 9 enters the first inspection device 6, the industrial computer encodes the serial number of each flat workpiece 9 and records the data obtained by the inspection devices 6 at different positions of each flat workpiece 9 one by one. Qualified products are recorded as good products, and unqualified products are recorded as waste products.

[0100] S5. When the carrier 21 is transported to the first track-changing mechanism 35, the first conveyor belt 332 transports the carrier 21 from the first conveying slide 334 to the first track-changing slide 354. The first track-changing drive unit 352 drives the first track-changing plate 353 to move the flat workpiece 9 to the conveying starting end of the second conveyor belt 342 and connects the carrier conveying teeth 25 of the carrier 21 to the surface of the second conveyor belt 342. The second conveyor belt 342 transports the carrier 21 to the unloading device 5. The first track-changing drive unit 352 drives the first track-changing plate 353 to move to the conveying end of the first conveyor belt 332.

[0101] S6. The second conveyor belt 342 conveys the worktable 21 to the second track-changing mechanism 36. The first unloading drive unit 54 drives the second unloading drive unit 55 to drive the unloading plate 53 to the conveying end of the second conveyor belt 342. The second unloading drive unit 55 drives the unloading plate 53 to move downward. The unloading suction cup 56 sucks up the flat workpiece 9 and then moves the flat workpiece 9 recorded as good to the unloading conveyor belt. The flat workpiece 9 recorded as defective is moved to the waste collection area or the waste conveyor belt.

[0102] S7. After the flat workpiece 9 on the worktable 21 is transported away, the second conveyor belt 342 transports the worktable 21 from the second conveying slide 344 to the second track change slide, and the second track change drive unit drives the second track change plate to drive the worktable 21 to move to the conveying starting end of the first conveyor belt 332 and connects the load conveying teeth 25 of the worktable 21 to the surface of the first conveyor belt 332. The first conveyor belt 332 continues to convey the worktable 21, and the second track change drive unit drives the second track change plate to move to the conveying end of the second conveyor belt 342, thereby completing the detection of the flat workpiece 9.

[0103] The flat workpiece detection method of this embodiment uses the above-mentioned flat workpiece detection equipment to detect the flat workpiece 9, and the detection result is more accurate. Moreover, by looping the above-mentioned steps, the flat workpieces 9 can be detected in large quantities, and the detection efficiency is higher.

[0104] The above descriptions are only partial embodiments of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A flat workpiece detection device, characterized in that: include: Workbench (1); air pump; A workpiece transport device (2), wherein the number of the workpiece transport devices (2) is plural, and the workpiece transport device (2) comprises a carrier (21), a connecting plate (22) and a connecting air pipe, wherein the bottom of the connecting plate (22) is provided with a first connecting air hole (221), the side of the connecting plate (22) is provided with a second connecting air hole (222), the interior of the connecting plate (22) is provided with a connecting air channel, the connecting air channel is used to connect the first connecting air hole (221) and the second connecting air hole (222), the upper surface of the carrier (21) is provided with a carrier adsorption hole (211), the side of the carrier (21) is provided with a carrier air hole (212), the interior of the carrier (21) is provided with a carrier air channel, the carrier air channel is used to connect the carrier adsorption hole (211) and the carrier air hole (212), and the carrier air hole (212) is connected to the second connecting air hole (222) through the connecting air pipe; An annular conveying device (3), the annular conveying device (3) comprising a first conveying track (31), a second conveying track (32), a first conveying mechanism (33), a second conveying mechanism (34), a first track-changing mechanism (35) and a second track-changing mechanism (36), wherein the first conveying mechanism (33), the first track-changing mechanism (35), the second conveying mechanism (34) and the second track-changing mechanism (36) are sequentially arranged end to end on the workbench (1) and can all convey the loading platform (21), the first conveying track (31) is arranged on one side of the first conveying mechanism (33), the second conveying track (32) is arranged on one side of the first conveying mechanism (33), and the second conveying track (32) is arranged on the other side of the first conveying mechanism (33). ) is provided on one side of the second conveying mechanism (34), the first conveying track (31) and the second conveying track (32) can both be used to support the connecting plate (22), the upper surface of the first conveying track (31) and the upper surface of the second conveying track (32) are both provided with a plurality of conveying adsorption holes (37), the plurality of conveying adsorption holes (37) can all be communicated with the first connecting air hole (221), the interior of the first conveying track (31) and the second conveying track (32) are both provided with a conveying air duct, the conveying air duct is communicated with the air pump, and the plurality of conveying adsorption holes (37) are all communicated with the conveying air duct; A loading device (4), the loading device (4) being arranged on the workbench (1) and located at the conveying starting end of the first conveying mechanism (33); a material unloading device (5), the material unloading device (5) being arranged on the workbench (1) and located at the conveying end of the second conveying mechanism (34); A detection device (6), wherein the number of the detection devices (6) is multiple, and the multiple detection devices (6) are all arranged on the workbench (1); An industrial computer is electrically connected to the air pump, the annular conveyor, the loading device (4) and the unloading device (5).

2. The flat workpiece detection device according to claim 1, characterized in that: The flat workpiece detection equipment further includes a positioning device (7), which is electrically connected to the industrial control machine; the positioning device (7) includes a positioning seat (71), a first positioning plate (72), a second positioning plate (73), a third positioning plate (74), a fourth positioning plate (75), a first positioning drive unit (76) and a second positioning drive unit (77), wherein the positioning seat (71) is provided on the workbench (1) and is located at the conveying starting end of the first conveying mechanism (33), the first positioning plate (72) and the third positioning plate (74) are relatively provided on the positioning seat (71), the first positioning drive unit (76) is connected to the first positioning plate (72) to drive the first positioning plate (72) to approach or move away from the third positioning plate (74), the second positioning plate (73) and the fourth positioning plate (75) are relatively provided on the positioning seat (71), and the second positioning drive unit (77) is connected to the second positioning plate (73) to drive the second positioning plate (73) to approach or move away from the fourth positioning plate (75).

3. The flat workpiece detection device according to claim 2, characterized in that: The loading device (4) includes a loading conveyor belt (41), a loading seat (42), a loading plate (43), a first loading drive unit (44), a second loading drive unit (45) and a loading suction cup (46), wherein the loading conveyor belt (41) is arranged on the workbench (1) and is located on the side of the positioning seat (71) away from the first conveying mechanism (33), the loading seat (42) is arranged on the workbench (1), the first loading drive unit (44) is arranged on the loading seat (42), the first loading drive unit (44) and the second loading drive unit (45) are connected to the loading plate (43) to drive the loading plate (43) to move in the vertical direction, and the loading plate (43) is provided with two loading stations, and both of the two loading stations are provided with the loading suction cup (46).

4. The flat workpiece detection device according to claim 2, characterized in that: The first conveying mechanism (33) comprises a first conveying seat (331), a first conveying belt (332), a first conveying drive unit (333), and a first conveying slide rail (334); the first conveying seat (331) is arranged on the workbench (1); the first conveying slide rail (334) and the first conveying belt (332) are both arranged on the first conveying seat (331); and the first conveying drive unit (333) is connected to the first conveying belt (332); The second conveying mechanism (34) includes a second conveying seat (341), a second conveying belt (342), a second conveying drive unit (343), and a second conveying slide rail (344); the second conveying seat (341) is arranged on the workbench (1); the second conveying slide rail (344) and the second conveying belt (342) are both arranged on the second conveying seat (341); and the second conveying drive unit (343) is connected to the second conveying belt (342); The bottom of the loading platform (21) is provided with a loading pulley (23) and a loading conveying part (24), the loading pulley (23) can be slidably connected to the first conveying slide rail (334) and the second conveying slide rail (344), the first conveyor belt (332) and the second conveyor belt (342) are both toothed conveyor belts, and the loading conveying part (24) is provided with loading conveying teeth (25), and the loading conveying teeth (25) can be connected to the first conveyor belt (332) and the second conveyor belt (342).

5. The flat workpiece detection device according to claim 4, characterized in that: The first conveying track (31) is provided on a side of the first conveying seat (331) away from the second conveying seat (341), and the second conveying track (32) is provided on a side of the second conveying seat (341) close to the first conveying seat (331); The first track-changing mechanism (35) comprises a first track-changing seat (351), a first track-changing drive unit (352), a first track-changing plate (353) and a first track-changing slide rail (354); the first track-changing seat (351) is arranged on the workbench (1) and is located at the conveying end of the first conveyor belt (332) and the conveying start of the second conveyor belt (342); the first track-changing drive unit (352) is arranged on the first track-changing seat (351); the first track-changing drive unit (352) is connected to the first track-changing plate (353); the first track-changing slide rail (354) is arranged on the first track-changing plate (353); and the loading pulley (23) is slidably connected to the first track-changing slide rail (354); The second track-changing mechanism (36) includes a second track-changing seat, a second track-changing drive unit, a second track-changing plate, and a second track-changing slide rail. The second track-changing seat is arranged on the workbench (1) and is located at the conveying end of the second conveyor belt (342) and the conveying start of the first conveyor belt (332). The second track-changing drive unit is arranged on the second track-changing seat. The second track-changing drive unit is connected to the second track-changing plate. The second track-changing slide rail is arranged on the second track-changing plate. The loading pulley (23) can be slidably connected to the second track-changing slide rail.

6. The flat workpiece detection device according to claim 5, characterized in that: The first track-changing mechanism (35) further comprises a first track-changing detection unit (355), a first track-changing blocking column (356), and a first track-changing blocking cylinder (357); the first track-changing detection unit (355) is provided on the first track-changing plate (353); the first track-changing detection unit (355) is electrically connected to the industrial control machine; the first track-changing blocking cylinder (357) is provided on the first track-changing plate (353); the first track-changing blocking cylinder (357) is connected to the first track-changing blocking column (356) to drive the first track-changing blocking column (356) to move in a vertical direction; The second track-changing mechanism (36) further comprises a second track-changing detection unit, a second track-changing blocking column and a second track-changing blocking cylinder, wherein the second track-changing detection unit is arranged on the second track-changing plate, the second track-changing detection unit is electrically connected to the industrial control machine, the second track-changing blocking cylinder is arranged on the second track-changing plate, and the second track-changing blocking cylinder is connected to the second track-changing blocking column to drive the second track-changing blocking column to move in a vertical direction.

7. The flat workpiece detection device according to claim 6, characterized in that: The flat workpiece detection equipment also includes a limiting device (8), which is electrically connected to the industrial control computer. The limiting device (8) is provided on the first conveying seat (331) and the second conveying seat (341); the limiting device (8) includes a limiting seat (81), a limiting cylinder (82), a limiting detection unit (83), a limiting plate (84) and a limiting roller (85). The limiting cylinder (82) and the limiting detection unit (83) are provided on the limiting seat (81), the limiting cylinder (82) is connected to the limiting plate (84) to drive the limiting plate (84) to move in the vertical direction, the limiting roller (85) is rotatably connected to the limiting plate (84), and the loading platform (21) is provided with a loading limiting groove (213) adapted to the limiting roller (85).

8. The flat workpiece detection device according to claim 1, characterized in that: The upper surface of the loading platform (21) is provided with a loading positioning block (26) and a plurality of loading limiting blocks (27), the plurality of loading limiting blocks (27) are arranged around the loading positioning block (26), the loading positioning block (26) is provided with a plurality of loading adsorption grooves (28), the plurality of loading adsorption grooves (28) can all be communicated with the loading adsorption holes (211), and the loading adsorption holes (211) are located on the bottom surfaces of the loading adsorption grooves (28).

9. The flat workpiece detection device according to claim 1, characterized in that: The unloading device (5) includes an unloading conveyor belt (51), an unloading seat (52), an unloading plate (53), a first unloading drive unit (54), a second unloading drive unit (55), an unloading suction cup (56) and a waste conveyor belt (57). The unloading conveyor belt (51) and the waste conveyor belt (57) are both arranged on the workbench (1) and are both located at the conveying end of the second conveying mechanism (34). The unloading seat (52) is arranged on the workbench (1). The first unloading drive unit (54) is arranged on the unloading seat (52). The first unloading drive unit (54) and the second unloading drive unit (55) are used to drive the second unloading drive unit (55) to move in a horizontal direction. The second unloading drive unit (55) is connected to the unloading plate (53) to drive the unloading plate (53) to move in a vertical direction. The unloading plate (53) is provided with the unloading suction cup (56).

10. A method for detecting a flat workpiece, characterized in that: The flat workpiece detection device according to claim 6 comprises the following steps: S1, the first loading drive unit (44) drives the second loading drive unit (45) to drive the loading plate (43) to move to the conveying end of the loading conveyor belt (41), the loading conveyor belt (41) conveys the flat workpiece (9) to be inspected to the bottom of the loading plate (43), the second loading drive unit (45) drives the loading plate (43) to move downward, the loading suction cup (46) sucks the flat workpiece (9), and then moves the flat workpiece (9) to the positioning seat (71); S2. After the flat workpiece (9) is placed on the positioning seat (71), the first positioning drive unit (76) drives the first positioning plate (72) to push the flat workpiece (9) toward the third positioning plate (74), and the second positioning drive unit (77) drives the second positioning plate (73) to push the flat workpiece (9) to be detected toward the fourth positioning plate (75), so that the flat workpiece (9) is limited to a specified area, and the loading suction cup (46) of one loading station of the loading plate (43) absorbs the flat workpiece (9) at the defined position, and the loading suction cup (46) of another loading station of the loading plate (43) can simultaneously absorb the flat workpiece (9) on the loading conveyor (41), and while the flat workpiece (9) at the defined position is transported to the first conveying mechanism (33), the flat workpiece (9) on the loading conveyor (41) can be transported to the positioning seat (71); S3, the first conveyor belt (332) conveys the loading platform (21) to the first track-changing mechanism (35). During the conveying process, the air pump is kept turned on, and the air at the loading platform (21) can pass through the loading adsorption hole (211), the loading air channel, the connecting air pipe, the connecting air channel and the conveying air channel in sequence and enter the air pump, thereby adsorbing the air at the loading platform (21) and fixing the flat workpiece (9) on the loading platform (21); S4, when the loading platform (21) is transported on the first conveying mechanism (33) and the second conveying mechanism (34), the detection device (6) at each position can detect the appearance of the flat workpiece (9), and the detection devices (6) at different positions detect different indicators of the appearance of the flat workpiece (9). When the flat workpiece (9) enters the first detection device (6), the industrial control computer encodes the serial number of each flat workpiece (9), and records the data obtained by the detection devices (6) at different positions of each flat workpiece (9) in a one-to-one correspondence, wherein qualified records are recorded as good products, and unqualified records are recorded as waste products; S5, when the carrier (21) is transported to the first track-changing mechanism (35), the first conveyor belt (332) transports the carrier (21) from the first conveying slide rail (334) to the first track-changing slide rail (354), the first track-changing drive unit (352) drives the first track-changing plate (353) to drive the flat workpiece (9) to move to the conveying start end of the second conveyor belt (342) and connects the carrier conveying teeth (25) of the carrier (21) to the surface of the second conveyor belt (342), the second conveyor belt (342) transports the carrier (21) to the unloading device (5), and the first track-changing drive unit (352) drives the first track-changing plate (353) to move to the conveying end end of the first conveyor belt (332); S6, the second conveyor belt (342) transports the loading platform (21) to the second track-changing mechanism (36), the first unloading drive unit (54) drives the second unloading drive unit (55) to drive the unloading plate (53) to move to the conveying end of the second conveyor belt (342), the second unloading drive unit (55) drives the unloading plate (53) to move downward, the unloading suction cup (56) sucks the flat workpiece (9), and then transports the flat workpiece (9) recorded as a good product to the unloading conveyor belt, and transports the flat workpiece (9) recorded as a waste product to the waste collection area; S7. After the flat workpiece (9) on the carrier (21) is transported away, the second conveyor belt (342) transports the carrier (21) from the second conveying slide (344) to the second track-changing slide, and the second track-changing driving unit drives the second track-changing plate to drive the carrier (21) to move to the conveying starting end of the first conveyor belt (332) and connects the carrier (21) conveying teeth (25) to the surface of the first conveyor belt (332). The first conveyor belt (332) continues to transport the carrier (21), and the second track-changing driving unit drives the second track-changing plate to move to the conveying end of the second conveyor belt (342), thereby completing the detection of the flat workpiece (9).

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