Automatic continuous material receiving device and method for semi-finished product number plates

Abstract

The invention discloses an automatic continuous material receiving device and method for semi-finished product number plates, and relates to the technical field of receiving the semi-finished product number plates pushed down from a forming die. The automatic continuous material receiving device comprises an inclined conveyor arranged on a base plate and a positioning mechanism used for positioning the semi-finished product number plates; the inclined conveyor is located between the flat belt conveyor and the forming mold, and a plurality of partition plates are fixedly arranged on a conveying belt of the inclined conveyor in the length direction of the conveying belt at intervals. The positioning mechanism is located between the inclined conveyor and the flat belt conveyor and comprises lifting air cylinders arranged on the left side and the right side of the flat belt conveyor respectively, cylinder bodies of the two lifting air cylinders are fixedly arranged on a base plate, and connecting plates are fixedly arranged at the acting ends of piston rods of the two lifting air cylinders. A surrounding frame located over a flat belt of the flat belt conveyor is welded between the two connecting plates. The device has the beneficial effects that the working intensity of workers is greatly relieved, and the production efficiency of subsequent finished number plates is improved.

Description

Technical Field

[0001] The invention relates to the technical field of catching a semi-finished number plate pushed down from a forming die, and in particular to an automatic continuous catching device and method for the semi-finished number plate. Background Art

[0002] The finished license plate for automobiles is made from semi-finished license plates, which are made from forming molds and are in the shape of long strips. The specific processing method of the finished license plate is: S1, the molding die processes the plastic into a semi-finished license plate; S2, the unloading mechanism pushes the semi-finished number plate 1 off the forming mold 2, and the semi-finished number plate 1 falls onto the flat belt 4 of the flat belt conveyor 3, as shown in FIG. Figure 1~Figure 2 As shown; S3, the flat belt 4 of the flat belt conveyor 3 conveys the semi-finished license plate 1 to the grabbing station of the robot grabbing arm; S4, the robot grabbing arm grabs the semi-finished license plate 1 from the flat belt 4 and stacks it in a designated area; S5. After a batch of semi-finished license plates 1 are stacked, workers can put the stacked semi-finished license plates 1 together into the next-level processing station. Through subsequent processing, the semi-finished license plates 1 can be finally processed into the required finished license plates.

[0003] Among them, in step S2, when the unloading mechanism pushes the semi-finished number plate 1 off the forming mold 2, due to the height difference between the forming mold 2 and the flat belt 4 of the flat belt conveyor 3 [the reason for the height difference is: the height of the robot grabbing arm is limited, so the height of the flat belt conveyor 3 must match the height of the robot grabbing arm, so there is a height difference between the flat belt conveyor 3 and the forming mold 2], therefore, when the semi-finished number plate 1 falls onto the flat belt 4 of the flat belt conveyor 3, the semi-finished number plate 1 bounces upward and changes its own position [and the process requires that after the semi-finished number plate 1 falls onto the flat belt 4, the long side of the semi-finished number plate 1 is perpendicular to the movement direction of the flat belt 4, so that the robot grabbing arm can accurately grab the semi-finished number plate 1], for this reason, it is also necessary to manually adjust the position of the semi-finished number plate 1 so that its long side is perpendicular to the movement direction of the flat belt 4, such as Figure 3 As shown, this not only increases the workload of workers, but also reduces the production efficiency of subsequent finished license plates.

[0004] In addition, since there is a large height difference between the forming mold 2 and the flat belt 4 of the flat belt conveyor 3, after a part of the semi-finished license plate 1 falls on the flat belt 4, the semi-finished license plate 1 bounces upward and falls to the outside of the flat belt 4. Therefore, it is necessary to manually put the semi-finished license plate 1 that has fallen on the outside of the flat belt 4 back on the flat belt 4, which undoubtedly further increases the work intensity of the workers.

[0005] Therefore, there is an urgent need for a continuous material receiving device and method that can greatly reduce the workload of workers and improve the production efficiency of subsequent finished license plates. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an automated continuous receiving device and method for semi-finished license plates which greatly reduces the workload of workers and improves the production efficiency of subsequent finished license plates.

[0007] The object of the present invention is achieved by the following technical solutions: an automatic continuous material receiving device for semi-finished number plates, which includes an inclined conveyor arranged on a pad and a positioning mechanism for positioning the semi-finished number plates, the inclined conveyor is located between a flat belt conveyor and a forming mold, the inclined conveyor is arranged to be inclined rightward and downward, a plurality of partitions are fixedly arranged on the conveyor belt of the inclined conveyor and spaced along its length direction, and a receiving groove for receiving the semi-finished number plates is formed between each two adjacent partitions; The positioning mechanism is located between the inclined conveyor and the flat belt conveyor, and includes lifting cylinders respectively arranged on the left and right sides of the flat belt conveyor, the cylinder bodies of the two lifting cylinders are fixed on the pad, the action ends of the piston rods of the two lifting cylinders are fixed with connecting plates, and a surrounding frame located just above the flat belt of the flat belt conveyor is welded between the two connecting plates; A longitudinal push cylinder is fixedly provided on the rear side wall of the frame, and the piston rod of the longitudinal push cylinder penetrates the rear side wall of the frame and extends into the inner cavity of the frame, and a longitudinal push plate is fixedly provided on the action end of the piston rod of the longitudinal push cylinder; side push cylinders are fixedly provided on the left and right outer walls of the frame, and the piston rods of the two side push cylinders extend into the inner cavity of the frame, and side push plates are fixedly provided on the action ends of the piston rods of the two side push cylinders; intercepting cylinders are fixedly provided on the left and right outer walls of the frame, and the piston rods of the two intercepting cylinders extend toward the outside of the frame, and L-plates are connected to the extending ends, the vertical plate of the L-plate is fixedly provided on the piston rod of the intercepting cylinder, and the horizontal plate of the L-plate is in contact with the bottom surface of the frame, and the horizontal plates of the two L-plates block the bottom port of the frame.

[0008] Two brackets are fixedly arranged on the pad, and the inclined conveyor is arranged between the two brackets.

[0009] The partitions are plastic plates, and the distance between every two adjacent partitions is greater than the length of the semi-finished number plate.

[0010] The two side-thrust cylinders are symmetrically arranged with respect to the surrounding frame, and the two lifting cylinders are symmetrically arranged with respect to the surrounding frame.

[0011] The thrust cylinder is located at the rear side of the intercepting cylinder.

[0012] The continuous material receiving device also includes a controller, which is electrically connected to the oblique conveyor, the lifting cylinder, the longitudinal push cylinder, the side push cylinder and the intercepting cylinder via a signal line.

[0013] An automatic continuous material receiving method for semi-finished number plates comprises the following steps: S1, control the start of the inclined conveyor and the flat belt conveyor. The inclined conveyor drives the conveyor belt to rotate clockwise, while the flat belt conveyor drives the flat belt to move backward; S2, the molding mold first processes the plastic into a semi-finished license plate, and then the unloading mechanism located on the left side of the molding mold pushes the semi-finished license plate off the molding mold, and the pushed semi-finished license plate falls into the receiving groove located at the upper end of the inclined conveyor; then the conveyor belt of the inclined conveyor moves the semi-finished license plate toward the positioning mechanism; when the semi-finished license plate moves to the low position of the inclined conveyor, the semi-finished license plate falls into the frame of the positioning mechanism under its own gravity, and is just supported on the top surface of the L plate. At this time, the semi-finished license plate is in an irregular arrangement; S3. Positioning the irregularly placed semi-finished number plate: the piston rod of the longitudinal push cylinder of the control positioning mechanism is extended forward, and the piston rod drives the longitudinal push plate to move forward, and the longitudinal push plate pushes the semi-finished number plate against the front side wall of the frame; then the piston rods of the two side push cylinders of the control positioning mechanism are extended, and the piston rods drive the side push plates to move toward the semi-finished number plate. When the piston rods of the side push cylinders are fully extended, the semi-finished number plate just rests between the two side push plates, thereby realizing the positioning of the semi-finished number plate, and the long side of the semi-finished number plate is perpendicular to the movement direction of the flat belt; S4. Place the positioned semi-finished license plate onto the flat belt of the flat belt conveyor. The specific operation steps are as follows: S41, the piston rods of the two lifting cylinders of the control positioning mechanism are retracted downward, the piston rods drive the connecting plate to move downward, the connecting plate drives the surrounding frame to move downward, the surrounding frame drives the longitudinal push cylinder, the side push cylinder and the intercepting cylinder to move downward synchronously, and then drives the L plate and the semi-finished product license plate to move synchronously toward the flat belt direction of the flat belt conveyor. When the L plate drops to the set distance, the controller controls the lifting cylinder to close; S42, the piston rods of the two intercepting cylinders of the control positioning mechanism extend outward, and the piston rods drive the L-plate to move outward, and the two L-plates move in opposite directions relative to the stationary semi-finished number plate. When the two L-plates are separated from the semi-finished number plate, the semi-finished number plate just falls onto the flat belt of the flat belt conveyor under its own gravity, thereby realizing the lowering of the positioned semi-finished number plate onto the flat belt of the flat belt conveyor, and further completing the receiving of a semi-finished number plate; S5. The flat belt of the flat belt conveyor conveys the semi-finished license plate to the grabbing station of the robot grabbing arm. The robot grabbing arm grabs the semi-finished license plate from the flat belt and stacks it in a designated area. S6. The worker repeats the operations of steps S2 to S5 to continuously receive multiple semi-finished license plates, and the robot arm grabs the semi-finished license plates to the designated area.

[0014] The invention has the following advantages: greatly reducing the work intensity of workers and improving the production efficiency of subsequent finished product license plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the semi-finished number plate falling onto the flat belt of the flat belt conveyor; Figure 2 for Figure 1 A-direction schematic diagram; Figure 3 A schematic diagram showing a worker adjusting the position of a semi-finished number plate so that its long side is perpendicular to the direction of movement of the flat belt; Figure 4 It is a structural schematic diagram of the present invention; Figure 5 for Figure 4 The main cross-sectional diagram of Figure 6 for Figure 5 Schematic diagram of direction B; Figure 7 is a schematic diagram of the structure of the enclosure; Figure 8 It is the structural schematic diagram of L plate; Fig. 9 for Figure 8 A top view of Fig.10 It is a structural schematic diagram of the inclined conveyor; Fig.11 A schematic diagram of a semi-finished license plate falling into a receiving groove located at the upper end of an inclined conveyor; Fig.12 It is a schematic diagram of the semi-finished license plate moving to the lower position of the inclined conveyor; Fig.13 This is a schematic diagram of semi-finished license plates in irregular placement; Fig.14 For Fig.13 Schematic diagram of C direction; Fig.15 Schematic diagram for realizing the positioning of semi-finished license plate; Fig.16 for Fig.15 D-direction schematic diagram; Fig.17 It is a schematic diagram of an L-plate approaching a flat belt of a flat belt conveyor; Fig.18 Schematic diagram of the positioned semi-finished license plate being lowered onto the flat belt of the flat belt conveyor; In the figure: 1-semi-finished license plate, 2-forming mold, 3-flat belt conveyor, 4-flat belt; 5- pad, 6- oblique conveyor, 7- positioning mechanism, 8- conveyor belt, 9- partition; 10-lifting cylinder, 11-connecting plate, 12-enclosing frame, 13-longitudinal push cylinder, 14-longitudinal push plate, 15-side push cylinder, 16-side push plate, 17-intercepting cylinder, 18-L plate, 19-bracket. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings, and the protection scope of the present invention is not limited to the following: like Figure 4~Figure 10 As shown, an automated continuous material receiving device for semi-finished license plates comprises an inclined conveyor 6 arranged on a pad 5 and a positioning mechanism 7 for positioning the semi-finished license plate 1, wherein the inclined conveyor 6 is located between the flat belt conveyor 3 and the forming mold 2, and is arranged to be inclined downward to the right, and a plurality of partitions 9 are fixedly arranged on the conveyor belt 8 of the inclined conveyor 6 and spaced along its length direction, and a receiving groove for receiving the semi-finished license plate 1 is formed between each two adjacent partitions 9; the partitions 9 are plastic plates, and the spacing between each two adjacent partitions 9 is greater than the length of the semi-finished license plate 1; two brackets 19 are fixedly arranged on the pad 5, and the inclined conveyor 6 is arranged between the two brackets 19.

[0017] The positioning mechanism 7 is located between the inclined conveyor 6 and the flat belt conveyor 3. The positioning mechanism 7 includes lifting cylinders 10 respectively arranged on the left and right sides of the flat belt conveyor 3. The cylinder bodies of the two lifting cylinders 10 are fixed on the pad 5. The active ends of the piston rods of the two lifting cylinders 10 are fixed with connecting plates 11. A frame 12 located directly above the flat belt 4 of the flat belt conveyor 3 is welded between the two connecting plates 11.

[0018] A longitudinal push cylinder 13 is fixedly provided on the rear side wall of the enclosure 12, and the piston rod of the longitudinal push cylinder 13 passes through the rear side wall of the enclosure 12 and extends into the inner cavity of the enclosure 12, and a longitudinal push plate 14 is fixedly provided on the active end of the piston rod of the longitudinal push cylinder 13; side push cylinders 15 are fixedly provided on the left and right outer walls of the enclosure 12, and the piston rods of the two side push cylinders 15 extend into the inner cavity of the enclosure 12, and side push plates 16 are fixedly provided on the active ends of the piston rods of the two side push cylinders 15; intercepting cylinders 17 are fixedly provided on the left and right outer walls of the enclosure 12, and the piston rods of the two intercepting cylinders 17 extend toward the outside of the enclosure 12, and L-plates 18 are connected to the extended ends, and the vertical plate of the L-plate 18 is fixedly provided on the piston rod of the intercepting cylinder 17, and the horizontal plate of the L-plate 18 contacts the bottom surface of the enclosure 12, and the horizontal plates of the two L-plates 18 block the bottom port of the enclosure 12. The side thrust cylinder 15 is located at the rear side of the intercepting cylinder 17 ; the two side thrust cylinders 15 are symmetrically arranged with respect to the surrounding frame 12 , and the two lifting cylinders 10 are symmetrically arranged with respect to the surrounding frame 12 .

[0019] The continuous material receiving device also includes a controller, which is electrically connected to the inclined conveyor 6, the lifting cylinder 10, the longitudinal push cylinder 13, the side push cylinder 15 and the intercepting cylinder 17 via a signal line. Workers can control the extension or retraction of the piston rods of the lifting cylinder 10, the longitudinal push cylinder 13, the side push cylinder 15 and the intercepting cylinder 17 through the controller, which facilitates the workers' operation and has the characteristics of a high degree of automation.

[0020] An automatic continuous material receiving method for semi-finished number plates comprises the following steps: S1, control the inclined conveyor 6 and the flat belt conveyor 3 to start, the inclined conveyor 6 drives the conveyor belt 8 to rotate clockwise, and the flat belt conveyor 3 drives the flat belt 4 to move backward; S2, the molding mold first processes the plastic into a semi-finished license plate, and then the unloading mechanism located on the left side of the molding mold pushes the semi-finished license plate 1 off the molding mold 2, and the pushed semi-finished license plate 1 falls into the receiving groove located at the upper end of the inclined conveyor 6, such as Fig.11 As shown; then the conveyor belt 8 of the oblique conveyor 6 moves the semi-finished license plate 1 toward the positioning mechanism 7; when the semi-finished license plate 1 moves to the lower position of the oblique conveyor 6, as shown Fig.12 As shown, the semi-finished number plate 1 falls into the frame 12 of the positioning mechanism 7 under its own gravity and is just supported on the top surface of the L plate 18. At this time, the semi-finished number plate 1 is in an irregular arrangement, such as Figure 13~Figure 14 As shown; S3. Positioning the irregularly placed semi-finished number plate 1: Control the piston rod of the longitudinal push cylinder 13 of the positioning mechanism 7 to extend forward, and the piston rod drives the longitudinal push plate 14 to move forward, and the longitudinal push plate 14 pushes the semi-finished number plate 1 against the front side wall of the frame 12; then control the piston rods of the two side push cylinders 15 of the positioning mechanism 7 to extend, and the piston rods drive the side push plates 16 to move toward the semi-finished number plate 1. When the piston rods of the side push cylinders 15 are fully extended, the semi-finished number plate 1 just rests between the two side push plates 16, thereby achieving the positioning of the semi-finished number plate 1. Figure 15-16 As shown, the long side of the semi-finished number plate 1 is perpendicular to the moving direction of the flat belt 4; S4, placing the positioned semi-finished license plate 1 onto the flat belt 4 of the flat belt conveyor 3, and the specific operation steps are as follows: S41, control the piston rods of the two lifting cylinders 10 of the positioning mechanism 7 to retract downward, the piston rods drive the connecting plate 11 to move downward, the connecting plate 11 drives the surrounding frame 12 to move downward, the surrounding frame 12 drives the longitudinal push cylinder 13, the side push cylinder 15 and the intercepting cylinder 17 to move downward synchronously, and then drives the L plate 18 and the semi-finished product license plate 1 to move synchronously toward the flat belt 4 of the flat belt conveyor 3. When the L plate 18 drops to the set distance, the controller controls the lifting cylinder 10 to close, such as Fig.17 As shown; S42, the piston rods of the two intercepting cylinders 17 of the control positioning mechanism 7 extend outward, and the piston rods drive the L-plate 18 to move outward. The two L-plates 18 move in opposite directions relative to the stationary semi-finished number plate 1. When the two L-plates 18 are separated from the semi-finished number plate 1, the semi-finished number plate 1 just falls onto the flat belt 4 of the flat belt conveyor 3 under its own gravity, thereby realizing the lowering of the positioned semi-finished number plate 1 onto the flat belt 4 of the flat belt conveyor 3, as shown in FIG. Fig.18 As shown, the connection of a semi-finished number plate 1 is completed; S5, the flat belt 4 of the flat belt conveyor 3 conveys the semi-finished number plate 1 to the grabbing station of the robot grabbing arm, and the robot grabbing arm grabs the semi-finished number plate 1 from the flat belt 4 and stacks it in a designated area; S6. The worker repeats the operations of steps S2 to S5 to continuously receive multiple semi-finished number plates 1, and the robot arm grabs the semi-finished number plates 1 to the designated area.

[0021] Among them, it can be seen from steps S2 to S4 that the material receiving device first preliminarily receives the semi-finished number plate 1 through the receiving groove of the inclined conveyor 6, and then the semi-finished number plate 1 is conveyed to the enclosure 12 of the positioning mechanism 7 by the inclined conveyor 6, and then the piston rod of the lifting cylinder 10 of the positioning mechanism 7 is retracted downward to make the semi-finished number plate 1 close to the flat belt 4 of the flat belt conveyor 3; finally, the piston rod of the intercepting cylinder 17 of the positioning mechanism 7 is controlled to extend outward, so that the semi-finished number plate 1 can be placed on the flat belt 4, thereby completing the material receiving of the semi-finished number plate 1. It can be seen that the material receiving device realizes the continuous and gradual reduction of the falling height of the semi-finished number plate 1, thereby effectively avoiding the semi-finished number plate 1 from falling directly on the flat belt 4 and then popping out to the outside of the flat belt 4, that is, effectively reducing the bounce height of the semi-finished number plate 1, therefore, there is no need for workers to place the semi-finished number plate 1 that falls to the outside on the flat belt 4 later, thereby greatly reducing the work intensity of the workers.

[0022] In addition, in step S3, since the irregularly placed semi-finished license plate 1 has been automatically positioned by the positioning mechanism 7, when the semi-finished license plate 1 falls onto the flat belt 4, the long side of the semi-finished license plate 1 is always perpendicular to the movement direction of the flat belt 4. Therefore, the worker does not need to manually adjust the position of the semi-finished license plate 1 so that its long side is perpendicular to the movement direction of the flat belt 4. This not only greatly reduces the work intensity of the workers, but also greatly improves the production efficiency of subsequent finished license plates.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic continuous receiving device for semi-finished license plates, characterized in that: It comprises an inclined conveyor (6) arranged on a pad (5) and a positioning mechanism (7) for positioning a semi-finished number plate (1); the inclined conveyor (6) is located between a flat belt conveyor (3) and a forming mold (2); the inclined conveyor (6) is arranged to be inclined rightward and downward; a plurality of partitions (9) are fixedly arranged on a conveyor belt (8) of the inclined conveyor (6) and spaced along its length direction; a receiving groove for receiving the semi-finished number plate (1) is formed between each two adjacent partitions (9); The positioning mechanism (7) is located between the inclined conveyor (6) and the flat belt conveyor (3), and comprises lifting cylinders (10) respectively arranged on the left and right sides of the flat belt conveyor (3), the cylinder bodies of the two lifting cylinders (10) are fixed on the pad (5), the action ends of the piston rods of the two lifting cylinders (10) are fixed with connecting plates (11), and a surrounding frame (12) located directly above the flat belt (4) of the flat belt conveyor (3) is welded between the two connecting plates (11); A longitudinal thrust cylinder (13) is fixedly provided on the rear side wall of the enclosure (12); a piston rod of the longitudinal thrust cylinder (13) penetrates the rear side wall of the enclosure (12) and extends into the inner cavity of the enclosure (12); a longitudinal thrust plate (14) is fixedly provided on the active end of the piston rod of the longitudinal thrust cylinder (13); side thrust cylinders (15) are fixedly provided on the left and right outer side walls of the enclosure (12); piston rods of the two side thrust cylinders (15) extend into the inner cavity of the enclosure (12); and the active ends of the piston rods of the two side thrust cylinders (15) are fixedly provided. A side thrust plate (16) is fixedly provided on each of the left and right outer walls of the enclosure (12); an interception cylinder (17) is fixedly provided on each of the left and right outer walls of the enclosure (12); the piston rods of the two interception cylinders (17) extend toward the outside of the enclosure (12), and an L-plate (18) is connected to the extended end; the vertical plate of the L-plate (18) is fixedly provided on the piston rod of the interception cylinder (17); the horizontal plate of the L-plate (18) contacts the bottom surface of the enclosure (12); and the horizontal plates of the two L-plates (18) block the bottom port of the enclosure (12).

2. The automatic continuous receiving device for semi-finished number plates according to claim 1 is characterized in that: Two brackets (19) are fixedly provided on the pad (5), and the inclined conveyor (6) is arranged between the two brackets (19).

3. The automatic continuous material receiving device for semi-finished number plates according to claim 2 is characterized in that: The partitions (9) are plastic plates, and the distance between each two adjacent partitions (9) is greater than the length of the semi-finished number plate (1).

4. The automatic continuous receiving device for semi-finished number plates according to claim 3 is characterized in that: The two side-thrust cylinders (15) are symmetrically arranged with respect to the surrounding frame (12), and the two lifting cylinders (10) are symmetrically arranged with respect to the surrounding frame (12).

5. The automatic continuous receiving device for semi-finished number plates according to claim 4 is characterized in that: The thrust cylinder (15) is located at the rear side of the intercepting cylinder (17).

6. The automatic continuous receiving device for semi-finished number plates according to claim 5, characterized in that: The continuous material receiving device also includes a controller, which is electrically connected to the inclined conveyor (6), the lifting cylinder (10), the longitudinal push cylinder (13), the side push cylinder (15) and the intercepting cylinder (17) via a signal line.

7. An automatic continuous material receiving method for semi-finished number plates, using the automatic continuous material receiving device for semi-finished number plates according to claim 6, characterized in that: It includes the following steps: S1, controlling the inclined conveyor (6) and the flat belt conveyor (3) to start, the inclined conveyor (6) drives the conveyor belt (8) to rotate clockwise, and the flat belt conveyor (3) drives the flat belt (4) to move backward; S2, the molding die first processes the plastic into a semi-finished number plate, and then the unloading mechanism located on the left side of the molding die pushes the semi-finished number plate (1) down from the molding die (2), and the pushed-down semi-finished number plate (1) falls into the receiving groove located at the upper end of the inclined conveyor (6); then the conveyor belt (8) of the inclined conveyor (6) moves the semi-finished number plate (1) toward the positioning mechanism (7); when the semi-finished number plate (1) moves to the lower position of the inclined conveyor (6), the semi-finished number plate (1) falls into the frame (12) of the positioning mechanism (7) under its own weight, and is just supported on the top surface of the L plate (18), and at this time, the semi-finished number plate (1) is in an irregular arrangement; S3, positioning the irregularly placed semi-finished number plate (1): the piston rod of the longitudinal push cylinder (13) of the positioning mechanism (7) is controlled to extend forward, and the piston rod drives the longitudinal push plate (14) to move forward, and the longitudinal push plate (14) pushes the semi-finished number plate (1) against the front side wall of the frame (12); then the piston rods of the two side push cylinders (15) of the positioning mechanism (7) are controlled to extend, and the piston rods drive the side push plates (16) to move toward the semi-finished number plate (1). When the piston rods of the side push cylinders (15) are fully extended, the semi-finished number plate (1) just abuts between the two side push plates (16), thereby achieving the positioning of the semi-finished number plate (1), and the long side of the semi-finished number plate (1) is perpendicular to the movement direction of the flat belt (4); S4. Place the positioned semi-finished number plate (1) onto the flat belt (4) of the flat belt conveyor (3). The specific operation steps are as follows: S41, the piston rods of the two lifting cylinders (10) of the control positioning mechanism (7) are retracted downward, the piston rods drive the connecting plate (11) to move downward, the connecting plate (11) drives the surrounding frame (12) to move downward, the surrounding frame (12) drives the longitudinal push cylinder (13), the side push cylinder (15) and the intercepting cylinder (17) to move downward synchronously, thereby driving the L plate (18) and the semi-finished product number plate (1) to move synchronously toward the flat belt (4) of the flat belt conveyor (3), and when the L plate (18) drops to a set distance, the controller controls the lifting cylinder (10) to close; S42, the piston rods of the two intercepting cylinders (17) of the control positioning mechanism (7) extend outward, and the piston rods drive the L-plate (18) to move outward, and the two L-plates (18) move in opposite directions relative to the stationary semi-finished number plate (1). When the two L-plates (18) are separated from the semi-finished number plate (1), the semi-finished number plate (1) just falls onto the flat belt (4) of the flat belt conveyor (3) under its own weight, thereby achieving the goal of placing the positioned semi-finished number plate (1) onto the flat belt (4) of the flat belt conveyor (3), and further completing the connection of a semi-finished number plate (1); S5, the flat belt (4) of the flat belt conveyor (3) conveys the semi-finished number plate (1) to the grabbing station of the robot grabbing arm, and the robot grabbing arm grabs the semi-finished number plate (1) from the flat belt (4) and stacks it in a designated area; S6. The worker repeats the operations of steps S2 to S5 to continuously receive multiple semi-finished number plates (1), and the robot arm grabs the semi-finished number plates (1) to the designated area.

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