A sheet metal assembly line

Abstract

The present invention discloses a sheet metal assembly line, including an upper assembly line, a lower assembly line and a lifting device, the lifting device including a lifting cylinder, a transmission mechanism arranged at the output end of the lifting cylinder, and a sensing mechanism, the upper assembly line is provided with a standby area trigger, the sensing mechanism includes a protection trigger and a lifting trigger arranged in sequence along the direction of the tooling plate entering the lifting device, the distance between the protection trigger and the lifting trigger is less than the length of the tooling plate in its transmission direction. By controlling the standby area trigger, the protection trigger and the lifting trigger, the lifting cylinder can only rise or fall when certain conditions are met, and their cooperation ensures that no accidents occur, each time the tooling plate triggers a trigger, the next step of movement is protected, avoiding new problems, so that the use of the lifting cylinder can also perfectly meet the new form of movement, reducing production costs and having good economic benefits.

Description

Technical Field

[0001] The invention relates to the production field of sheet metal parts, and in particular to a sheet metal assembly line. Background Art

[0002] When sheet metal parts are produced and assembled, they can be installed on a circulating assembly line. The existing circulating assembly line generally uses a motor-driven lifting device to transfer the tooling plates up and down. The cost of some transmission mechanisms such as motors is relatively high, and the precise control of the motor rotation amount to ensure the movement is in place requires stepper motors, servo motors, etc., which increases the production cost.

[0003] In addition, if other transmission methods are used, the new transmission methods may bring new problems, such as how to control the specific transmission logic, when to control the lifting and lowering, how to ensure that no other accidents occur during the transmission process, and how to protect the transmission of the tooling board. These are all problems that need to be solved. Summary of the invention

[0004] In order to solve the problems in the prior art, the purpose of the present invention is to provide a sheet metal assembly line.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A sheet metal assembly line comprises an upper assembly line, a lower assembly line and a lifting device, wherein the lifting device comprises a frame, a lifting cylinder arranged on the frame, a conveying mechanism arranged at the output end of the lifting cylinder, and a sensing mechanism, wherein the lifting cylinder comprises a lifting state and a falling state, wherein the conveying mechanism docks with the upper assembly line in the lifting state, and docks with the lower assembly line in the falling state, wherein the upper assembly line, the lower assembly line and the conveying mechanism are all used for conveying a tooling plate, wherein the sheet metal parts are placed on the tooling plate, wherein a standby area trigger is arranged on the upper assembly line, and wherein the sensing mechanism comprises a protection trigger and a lifting trigger arranged in sequence along the direction in which the tooling plate enters the lifting device, wherein the distance between the protection trigger and the lifting trigger is less than the length of the tooling plate in its transmission direction;

[0007] When the tooling plate triggers the protection triggering member, the lifting cylinder is stationary;

[0008] When the tooling plate triggers the lifting trigger member, the lifting cylinder switches from the falling state to the lifting state;

[0009] When the tooling plate triggers the triggering member in the candidate area, the lifting cylinder is stationary;

[0010] When the tooling plate does not trigger the triggering member in the standby area, the lifting cylinder switches from the raised state to the dropped state.

[0011] As a further improvement of the present invention, the upper assembly line is provided with a plurality of workstations along its conveying direction, and each of the workstations is provided with a roller blocking cylinder and a workstation switch for controlling the movement of the roller blocking cylinder.

[0012] As a further improvement of the present invention, the length L of the tooling plate in its transmission direction, the distance between one end of the upper assembly line close to the lifting device and the roller blocking cylinder adjacent to the lifting device is greater than or equal to 2L and less than 3L.

[0013] As a further improvement of the present invention, in the conveying direction of the tooling plate, the distance between the roller blocking cylinder adjacent to the lifting device and the trigger member in the standby area is greater than L.

[0014] As a further improvement of the present invention, the conveying mechanism includes a horizontal conveyor belt, and the upper assembly line and the lower assembly line both include a conveying surface. In the raised state, the upper surface of the horizontal conveyor belt is flush with the conveying surface of the upper assembly line, and in the dropped state, the upper surface of the horizontal conveyor belt is flush with the conveying surface of the lower assembly line.

[0015] As a further improvement of the present invention, the conveying mechanism includes a carrier, on which two groups of parallel rollers are arranged, and the horizontal conveyor belt is wound around the rollers. One of the rollers is connected to a driving device, and the driving device includes a motor that can rotate forward and reverse.

[0016] As a further improvement of the present invention, the tooling plate is configured as a double-layer turntable tooling plate.

[0017] As a further improvement of the present invention, the work station switch is configured as a foot-operated switch, and the work station switch includes a reset state and a stepped-down state. In the reset state, the blocking member of the roller blocking cylinder abuts against the notch of the tooling plate, and in the stepped-down state, the blocking member of the roller blocking cylinder moves to below the notch.

[0018] As a further improvement of the present invention, the protection triggering member, the lifting triggering member, and the standby area triggering member are all configured as travel switches.

[0019] The beneficial effects of the present invention are as follows: by changing the form of motor drive to the form of cylinder drive, its production cost is reduced, and further through the cooperation of the sensing mechanism, it can accurately transmit and control the running trajectory of the tooling plate, and by controlling the standby area trigger, the protection trigger and the lifting trigger, the jacking cylinder can only rise or fall when certain conditions are met, and their cooperation ensures that no accidents occur. Each time the tooling plate triggers a trigger, the next step of movement is protected to avoid new problems. In this way, the use of the jacking cylinder can perfectly meet the new form of movement, reduce production costs, and have good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of a circulation pipeline according to an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a lifting device loaded with a tooling plate according to an embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a lifting device unloading a tooling plate according to an embodiment of the present invention;

[0023] Figure 4 is a top view of a falling state of an embodiment of the present invention;

[0024] Figure 5 is a top view of a raised state of an embodiment of the present invention;

[0025] Among them, 1. lifting device; 11. lifting cylinder; 12. transmission mechanism; 121. horizontal conveyor belt; 122. roller; 123. driving rod; 124. sprocket mechanism; 125. motor; 13. frame; 141. interruption trigger; 142. protection trigger; 143. lifting trigger; 2. upper assembly line; 21. roller blocking cylinder; 22. standby area trigger; 3. lower assembly line; 31. blocking cylinder; 4. tooling plate; 41. gap. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific embodiments.

[0027] An embodiment of the present invention provides a sheet metal assembly line, where sheet metal parts are placed on a tooling plate on the line, a plurality of workstations are arranged on the line, and the circulating tooling plate facilitates production, and workers do not need to move and can continue to operate production.

[0028] Specifically, Figure 1As shown, a circulating assembly line of the present embodiment includes an upper assembly line 2, a lower assembly line 3 and a lifting device 1. The lifting device 1 includes a frame 13, a lifting cylinder 11 arranged on the frame 13, a conveying mechanism 12 arranged at the output end of the lifting cylinder 11, and an induction mechanism. The lifting cylinder 11 includes a lifting state and a falling state. In the lifting state, the conveying mechanism 12 is connected to the upper assembly line 2. In the falling state, the conveying mechanism 12 is connected to the lower assembly line 3. The upper assembly line 2 and the lower assembly line 3 are respectively transmitted in opposite directions, and the lifting devices 1 on both sides are respectively raised or lowered. The entire circulating assembly line forms a closed whole, realizing the cyclic transmission of the tooling plate 4.

[0029] The lifting device 1 of this embodiment is as follows Figure 2 As shown in or 3, it mainly describes the lifting device 1 for moving the tooling plate 4 from the lowered position to the raised position on one side. On the other side of the upper assembly line 2 and the lower assembly line 3, there is another lifting device 1 for moving the tooling plate 4 from the raised position to the lowered position.

[0030] Furthermore, the upper assembly line 2 is provided with a plurality of workstations along its conveying direction, each of which is provided with a roller blocking cylinder 21 and a workstation switch for controlling the movement of the roller blocking cylinder 21, and the workstation switch is provided as a foot-operated switch, and the workstation switch includes a reset state and a stepped-down state. In the reset state, the blocking member of the roller blocking cylinder 21 abuts against the notch 41 of the tooling plate 4, and in the stepped-down state, the blocking member of the roller blocking cylinder 21 moves to below the notch 41.

[0031] At each workstation, the worker operates the workstation switch and releases the tooling board 4 on the current workstation by stepping on the foot pedal. The upper assembly line 2 and the lower assembly line 3 are both set as double-speed chain assembly lines, which are always in motion. After the tooling board 4 is released, it is directly transferred to the next workstation, and the tooling board 4 at the previous workstation can be transported to this workstation.

[0032] The upper assembly line 2 is provided with a candidate area trigger 22, and the sensing mechanism includes a protection trigger 142 and a lifting trigger 143 which are sequentially arranged along the direction in which the tooling board 4 enters the lifting device 1, and the distance between the protection trigger 142 and the lifting trigger 143 is less than the length of the tooling board 4 in its transmission direction;

[0033] The tooling plate 4 blocked by the roller blocking cylinder 21 closest to the lifting device 1 is the first workstation of the upper assembly line 2. A standby area is set upstream of the workstation. When the tooling plate 4 on the first workstation needs to be transported downstream, the tooling plate 4 in the standby area is driven by the speed chain and moves to the first workstation. The standby area trigger 22 is used to ensure that there are always new tooling plates 4 in the standby area to supplement the first workstation.

[0034] The candidate area trigger 22 can be located below the tooling board 4 of the first station to detect whether there is a tooling board 4 at that position, or below the candidate area to detect whether there is a tooling board 4. In particular, in this embodiment, Figure 5 As shown, it is set below the standby area, and the operation logic is clearer and more accurate. There is always a tooling plate 4 in the standby area, and the tooling plate 4 is adjacent to the tooling plate 4 of the first station. At this time, the lifting device 1 is in a raised state, and the standby area trigger 22 is always in a triggered state. When the tooling plate 4 of the first station is transported away, the tooling plate 4 in the standby area moves forward until the standby area trigger 22 is no longer triggered, which means that the state of the standby area is empty at this time. The standby area trigger 22 is used to control the downward movement of the lifting cylinder 11. When the tooling plate 4 does not trigger the standby area trigger 22, the lifting cylinder 11 switches from the raised state to the dropped state.

[0035] A protective trigger 142 and a lifting trigger 143 are also provided on the conveying mechanism 12, which are arranged in sequence along the direction in which the tooling board 4 enters the lifting device 1. When the lifting cylinder 11 drops the conveying mechanism 12, the conveying mechanism 12 can be opened, and the horizontal conveyor belt 121 continues to convey the tooling board 4 to the inside of the lifting device 1. When the tooling board 4 is transported from the lower assembly line 3 to the conveying mechanism 12, the tooling board 4 first triggers the protective trigger 142, and the lifting cylinder 11 is stationary. The significance of this is that when the tooling board 4 reaches this position, the lifting cylinder 11 is controlled not to move, so as to prevent the tooling board 4 from moving into place before the lifting cylinder 11 suddenly moves due to accidental touch or other reasons, causing the tooling board 4 to fall. In other words, the protective trigger 142 is equivalent to a switch, which is triggered to close by the entering tooling board 4.

[0036] When the tooling plate 4 triggers the lifting trigger 143, the lifting cylinder 11 switches from the falling state to the lifting state; after the tooling plate 4 triggers the protection trigger 142, it continues to move into the lifting device 1 until the lifting trigger 143 is triggered. At this time, the conveying mechanism 12 can be controlled to stop conveying, and the lifting cylinder 11 is opened. At this time, the lifting cylinder 11 switches from the falling state to the lifting state, and the tooling plate 4 is transported to the upper assembly line 2. In other words, the protection trigger 142 first closes the lifting cylinder 11, and the lifting trigger 143 opens the lifting cylinder 11 again. Only when both triggers are triggered, the upward movement of the lifting cylinder 11 is started.

[0037] After moving upward to the raised state, the motor 125 reverses, and the horizontal conveyor belt 121 continues to convey the tooling plate 4 to the outside of the lifting device 1 until it is transported to the external upper assembly line 2. The new tooling plate 4 triggers the standby area trigger 22 again, causing the lifting cylinder 11 to stop, that is, it remains in the raised state until the next standby area trigger 22 stops being triggered again. When the tooling plate 4 does not trigger the standby area trigger 22, the lifting cylinder 11 switches from the raised state to the lowered state.

[0038] The length L of the tooling plate 4 in its transmission direction is set, and the distance between the roller blocking cylinder 21 adjacent to the lifting device 1 at one end of the upper assembly line 2 close to the lifting device 1 is greater than or equal to 2L and less than 3L. In other words, only one tooling plate 4 can be accommodated in the standby area, which can make the judgment logic of the standby area trigger 22 clearer and ensure that there is always a tooling plate 4 in the standby area.

[0039] Also, in the conveying direction of the tooling plate 4, the distance between the roller blocking cylinder 21 adjacent to the lifting device 1 and the standby area trigger 22 is greater than L, that is, the standby area trigger 22 is set at the position of the standby area, as described above, which can make the control logic clearer.

[0040] The upper assembly line 2, the lower assembly line 3 and the conveying mechanism 12 are all used to transport the tooling plate 4. A notch 41 is set at at least one end of the tooling plate 4 along the transmission direction. In this embodiment, there are notches 41 at both ends. A blocking cylinder 31 is set at a position of the lower assembly line 3 near the lifting device 1. The blocking position of the blocking cylinder 31 corresponds to the notch 41. The sensing mechanism includes an interrupt trigger 141. When the interrupt trigger 141 is triggered, the blocking cylinder 31 moves away from the notch 41. The distance between the interrupt trigger 141 and the blocking cylinder 31 is equal to the length of the tooling plate 4 in its transmission direction.

[0041] Since the lifting cylinder 11 has only two states, a falling state and a lifting state, the positions corresponding to the two states are accurately fixed every time, so there is no need to control the movement stroke like the motor 125, control the rotation amount of the motor 125, and no complicated transmission mechanism is required, thereby greatly reducing costs.

[0042] In addition, if Figure 4As shown, when multiple tooling plates 4 move together along the lower assembly line 3 toward the lifting device 1, the notch 41 position of the first tooling plate 4 is first blocked by the blocking cylinder 31, and after the lifting cylinder 11 is actuated and descends to a dropped state, the blocking cylinder 31 releases the tooling plate 4. In the process of multiple tooling plates 4 moving forward in sequence, the first tooling plate 4 reaches the interruption trigger 141, and since the distance between the interruption trigger 141 and the blocking cylinder 31 is equal to the length of the tooling plate 4 in its transmission direction, the blocking cylinder 31 is raised just after the first tooling plate 4 reaches this position, and the blocking cylinder 31 is inserted into the notch 41 position between the first tooling plate 4 and the second tooling plate 4, thereby forming a blockage for the following tooling plate 4, and only one tooling plate 4 is lifted at a time.

[0043] Furthermore, the conveying mechanism 12 includes a horizontal conveyor belt 121, and both the upper assembly line 2 and the lower assembly line 3 include a conveying surface. In the raised state, the upper surface of the horizontal conveyor belt 121 is flush with the conveying surface of the upper assembly line 2, and in the dropped state, the upper surface of the horizontal conveyor belt 121 is flush with the conveying surface of the lower assembly line 3. In this way, the smooth transportation of the tooling plate 4 can be ensured, and the cylinder transmission position is accurate, and the height consistency can be ensured every time.

[0044] And, if Figure 2 or Figure 3 As shown, the conveying mechanism 12 includes a carrier, and two groups of parallel rollers 122 are arranged on the carrier. A horizontal conveyor belt 121 is wound around the rollers 122. One of the rollers 122 is connected to a driving device, and the driving device includes a motor 125 that can rotate forward and reverse. The motor 125 drives the sprocket mechanism 124 to rotate, and the link mechanism drives the driving rod 123 to rotate. The driving rod 123 is simultaneously connected to the rollers 122 on both sides. Multiple groups of rollers 122 are arranged, and one group of parallel rollers 122 is the driving wheel, and the other rollers 122 are driven wheels, and a horizontal conveyor belt 121 is wound around them. In this way, when the motor 125 rotates, it drives the horizontal conveyor belt 121 to rotate forward or reverse, thereby realizing that when the lower assembly line 3 is docked, the tooling plate 4 is transported into the lifting device 1, and when the upper assembly line 2 is docked, the tooling plate 4 is transported out from the inside of the lifting device 1.

[0045] Furthermore, the interrupt trigger 141, the protection trigger 142, the lifting trigger 143, and the standby area trigger 22 are all configured as travel switches, and the tooling plate 4 abuts against the travel switch, and the travel switch can be rotated or pressed to trigger its action.

[0046] Of course, it can also be achieved if it is set to a photoelectric switch, etc., but the cost of the travel switch is low, and it does not require more requirements for the control voltage and circuit structure design like the photoelectric switch. The use of the travel switch here can perfectly meet the use requirements.

[0047] The tooling plate 4 is configured as a double-layer turntable tooling plate 4 , and the sheet metal parts are placed on the double-layer turntable tooling plate 4 , so that they can be easily rotated to any desired position.

[0048] Compared with the prior art, this embodiment has the following beneficial effects:

[0049] (1) By changing the driving mode of the motor 125 to the cylinder driving mode, the production cost is reduced, and further, through the cooperation of the sensing mechanism, the running trajectory of the tooling plate 4 can be accurately transmitted and controlled. By controlling the control mode and position relationship between the interrupt trigger 141 and the blocking cylinder 31, it is ensured that only one tooling plate 4 is transmitted each time, and the next tooling plate 4 can be stopped by the blocking cylinder 31.

[0050] (2) By controlling the standby area trigger 22, the protection trigger 142 and the lifting trigger 143, the lifting cylinder 11 can rise or fall only when certain conditions are met, and their coordination ensures that no accidents occur. Each time the tooling plate 4 triggers a trigger, the next movement is protected to avoid new problems. In this way, the use of the lifting cylinder 11 can also perfectly meet the new form of movement.

[0051] (3) All operations can be completed automatically without human intervention, which improves assembly efficiency, reduces workers' workload, reduces production costs, and has good economic benefits.

[0052] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A sheet metal assembly line, comprising an upper assembly line (2), a lower assembly line (3) and a lifting device (1), characterized in that: The lifting device (1) comprises a frame (13), a lifting cylinder (11) arranged on the frame (13), a transmission mechanism (12) arranged at the output end of the lifting cylinder (11), and a sensing mechanism. The lifting cylinder (11) comprises a lifting state and a lowering state. In the lifting state, the transmission mechanism (12) is connected to the upper assembly line (2). In the lowering state, the transmission mechanism (12) is connected to the lower assembly line (3). The upper assembly line (2 ), the lower assembly line (3) and the conveying mechanism (12) are both used for conveying the tooling board (4), the upper assembly line (2) is provided with a standby area trigger (22), the sensing mechanism comprises a protection trigger (142) and a lifting trigger (143) sequentially arranged along the direction in which the tooling board (4) enters the lifting device (1), and the distance between the protection trigger (142) and the lifting trigger (143) is less than the length of the tooling board (4) in its transmission direction; When the tooling plate (4) triggers the protection triggering member (142), the lifting cylinder (11) is stationary; When the tooling plate (4) triggers the lifting trigger member (143), the lifting cylinder (11) switches from the falling state to the lifting state; When the tooling plate (4) triggers the candidate area triggering member (22), the lifting cylinder (11) is stationary; When the tooling plate (4) does not trigger the candidate area triggering member (22), the lifting cylinder (11) switches from the raised state to the lowered state.

2. The sheet metal assembly line according to claim 1, characterized in that: The upper assembly line (2) is provided with a plurality of workstations along its conveying direction, and each of the workstations is provided with a roller blocking cylinder (21) and a workstation switch for controlling the movement of the roller blocking cylinder (21).

3. The sheet metal assembly line according to claim 2, characterized in that: The length L of the tooling plate (4) in its transmission direction, the distance between one end of the upper assembly line (2) close to the lifting device (1) and the roller blocking cylinder (21) adjacent to the lifting device (1) is greater than or equal to 2L and less than 3L.

4. The sheet metal assembly line according to claim 3, characterized in that: In the conveying direction of the tooling plate (4), the distance between the roller blocking cylinder (21) adjacent to the lifting device (1) and the standby area triggering member (22) is greater than L.

5. The sheet metal assembly line according to claim 2, characterized in that: The workstation switch is configured as a foot-operated switch, and the workstation switch includes a reset state and a stepped-on state. In the reset state, the blocking member of the roller blocking cylinder (21) abuts against the notch (41) of the tooling plate (4), and in the stepped-on state, the blocking member of the roller blocking cylinder (21) moves to below the notch (41).

6. The sheet metal assembly line according to claim 1, characterized in that: The conveying mechanism (12) comprises a horizontal conveyor belt (121), and the upper assembly line (2) and the lower assembly line (3) both comprise conveying surfaces. In the raised state, the upper surface of the horizontal conveyor belt (121) is flush with the conveying surface of the upper assembly line (2), and in the lowered state, the upper surface of the horizontal conveyor belt (121) is flush with the conveying surface of the lower assembly line (3).

7. The sheet metal assembly line according to claim 6, characterized in that: The conveying mechanism (12) comprises a carrier, on which two groups of parallel rollers (122) are arranged, and the horizontal conveyor belt (121) is wound around the rollers (122). One of the rollers (122) is connected to a driving device, and the driving device comprises a motor (125) that can rotate forward and backward.

8. The sheet metal assembly line according to claim 1, characterized in that: The tooling plate (4) is configured as a double-layer turntable-type tooling plate (4).

9. The sheet metal assembly line according to claim 1, characterized in that: The protection trigger (142), the lifting trigger (143), and the standby area trigger (22) are all configured as travel switches.

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