Automatic tray centering system and turnover machine

Abstract

The utility model discloses a tray automatic centering system and a tilter, the tilter comprises a roll-over stand which is driven by a driving mechanism to rotate, the roll-over stand is provided with a coiled material receiving surface for receiving coiled materials and a tray receiving surface which is intersected with the coiled material receiving surface and is used for receiving trays, and the system comprises a baffle plate, a controller and a fastening mechanism, the baffle is provided with a datum plane used for making contact with the side, close to the coiled material receiving face, of the tray, the turnover machine comprises a plurality of rows of conveying rollers located on the tray receiving face and used for moving the tray, and the controller is in control connection with a motor in driving connection with the conveying rollers. The controller is used for obtaining the moving distance of the tray from a first position close to the datum plane of the baffle to a second position when the center line of the tray is aligned with the center line of the coiled material and controlling the motor to enable the tray to move to the second position, and the fastening mechanism is installed on the receiving face of the tray and can abut against or leave the tray. The tray is fixed relative to the conveying roller or moves relative to the conveying roller.

Description

Technical Field

[0001] The utility model relates to the technical field of coil turning, in particular to an automatic centering system and a turning machine for a pallet. Background Art

[0002] When packing coils including aluminum coils, the coils need to be placed on pallets to facilitate the movement and lifting of the coils. Specifically, after the packaging production line completes the automatic film wrapping and packaging of the coils, the coil transport trolley transports the coils to the turning machine, which turns them 90 degrees so that the coils are located on the pallet.

[0003] In order to meet the diverse packaging needs of the production line, pallets of different specifications are needed to accommodate coils of different diameters. The flipping machine needs to flip the coil onto a pallet corresponding to the diameter of the coil. After the coil is located on the pallet, there is a defect that the deviation between the center line of the coil and the center line of the pallet is too large, which urgently needs to be improved. Utility Model Content

[0004] The present application provides a pallet automatic centering system and a turning machine, which solves the technical problem in the prior art that the deviation between the center line of the coil and the center line of the pallet is too large after the coil is placed on the pallet.

[0005] The present application provides a pallet automatic centering system, which is applied to a turning machine. The turning machine includes a turning frame driven to rotate by a driving mechanism, the turning frame having a coil receiving surface for receiving the coil and a tray receiving surface for receiving the pallet intersecting the coil receiving surface. The pallet automatic centering system includes a baffle, a controller and a fastening mechanism. The baffle is provided with a reference surface for contacting a side of the pallet close to the coil receiving surface. The turning machine includes a plurality of conveying rollers in a row located on the tray receiving surface for moving the pallet. The controller is connected to a motor control connected to the conveying roller drive. The controller is used to obtain a moving distance of the pallet when it moves from a first position close to the reference surface of the baffle to a second position when the center line of the pallet is aligned with the center line of the coil, and controls the motor to move the pallet to the second position. The fastening mechanism is installed on the tray receiving surface. The fastening mechanism can press against or leave the pallet to fix the pallet relative to the conveying roller or move the pallet relative to the conveying roller.

[0006] In some embodiments, the controller includes:

[0007] A first controller is used to obtain a moving distance of the tray when it moves from a first position close to the baffle to a second position when the center line of the tray is aligned with the center line of the coil;

[0008] A second controller is connected to the first controller by signal and is connected to the motor control;

[0009] In some embodiments, the first controller is a PLC.

[0010] In some embodiments, the second controller includes:

[0011] A frequency converter, connected to the first controller signal and connected to the motor control;

[0012] The encoder is connected to the inverter signal and the motor.

[0013] In some embodiments, the automatic pallet centering system includes:

[0014] The first detection grating is installed on the receiving surface of the tray and is connected to the controller signal. The detection light curtain formed by the first detection grating is located on the receiving surface of the tray.

[0015] In some embodiments, the automatic pallet centering system includes:

[0016] The second detection grating is installed on the receiving surface of the tray and is connected to the controller signal. The tray includes a blocking surface that contacts the tray when the tray is close to the baffle and is in the first position. The detection light curtain formed by the second detection grating is close to the blocking surface.

[0017] In some embodiments, the fastening mechanism comprises:

[0018] At least two driving members are mounted on the turning frame;

[0019] At least two clamps are connected to at least two driving members respectively. Under the driving of the driving members, the at least two clamps move closer to or farther away from each other to leave or press against the tray.

[0020] In some embodiments, the automatic tray centering system includes at least two baffles, and the at least two baffles are spaced apart from each other.

[0021] In some embodiments, the motor is an AC motor.

[0022] A turning machine comprises a frame, a driving mechanism, a turning frame and the above-mentioned automatic pallet centering system, wherein the driving mechanism is mounted on the frame, the turning frame is rotatably mounted on the frame, the turning frame is drivingly connected to the driving mechanism, the turning frame comprises an intersecting coil receiving surface and a pallet receiving surface, the coil receiving surface is provided with at least two pallets, at least two pallets are spaced in sequence, the pallet receiving surface is used to receive the pallet, the pallet receiving surface is provided with a plurality of conveying rollers in a row for moving the pallet, the automatic pallet centering system comprises a baffle, a controller and a fastening mechanism, the baffle and the fastening mechanism are both arranged on the pallet receiving surface, and the controller is opposite to the turning frame.

[0023] The beneficial effects of the present application are as follows: a pallet automatic centering system is provided, which is applied to a turning machine, and a horizontal coil is turned onto a pallet by the turning machine, and the coil is still horizontal after turning. The system sets a baffle on the side of the pallet receiving surface facing the coil receiving surface, and the baffle protrudes from the coil receiving surface. The pallet is placed on the conveyor roller on the pallet receiving surface, and the pallet position is moved by the conveyor roller, so that the pallet can be moved to a position blocked by the baffle, which is the first position. When the pallet is in the first position, the pallet is close to the baffle, and when the pallet is in the second position, the center line of the pallet is aligned with the center line of the coil. The second position is the key point of the present solution, and the controller can calculate the movement of the pallet from the first position to the second position. The system controls the motor to drive the pallet through the conveyor roller, and makes the pallet move the distance from the first position to the second position. When the pallet is adjusted to the second position, the pallet is fastened in the second position by the fastening mechanism, and then the turning machine rotates the turning frame 90°. The structure of the coil receiving surface receives the coil and places the coil on the pallet on the pallet receiving surface. The system ensures that the center line of the coil is aligned with the center line of the pallet, and can realize automatic centering of the pallet and the coil, which not only reduces human intervention in the production process and reduces workload, but also improves the technical problem of excessive deviation between the center line of the coil and the center line of the pallet after the coil is located on the pallet, which is beneficial to improving the production efficiency of the production unit and the automation level of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model.

[0025] Figure 1 A schematic diagram of an automatic pallet centering system provided for this application;

[0026] Figure 2 A schematic diagram of the structure of a pallet;

[0027] Figure 3 A schematic diagram of placing coils on a pallet;

[0028] Figure 4 A schematic diagram of a pallet automatic centering system provided in the present application when preparing to flip a coil;

[0029] Figure 5 is a schematic diagram of a tray in a first position;

[0030] Figure 6 Schematic diagram of the tray in the second position.

[0031] Figure markings: 10-turning frame, 11-coil receiving surface, 111-pallet, 12-pallet receiving surface, 121-conveying roller, 20-coil, 21-coil center line, r1-coil radius, 30-pallet, 31-base, 32-support rod, 321-pallet center line, h1-pallet application size, h2-moving distance, 40-saddle of coil transport trolley, 50-baffle, 60-fastening mechanism, 61-clamp, 70-first detection grating, 71-detection light curtain formed by the first detection grating, 80-second detection grating, 81-detection light curtain formed by the second detection grating, 90-frame. DETAILED DESCRIPTION

[0032] After the packaging production line completes the automatic film wrapping and packaging of the coils, the coil transport trolley transports the coils to the turning machine, and the turning machine places the coils on the pallet. The turning machine includes a turning frame driven to rotate by a driving mechanism, and the turning frame has a coil receiving surface for receiving the coils and a pallet receiving surface intersecting with the coil receiving surface for receiving the pallet.

[0033] The turning machine targeted by the present application turns over a horizontal coil so that the coil is placed on a pallet, and the turned coil is still horizontal. Figure 3 A diagram showing horizontal coils sitting on a pallet, Figure 4 It is a schematic diagram of a horizontal coil being moved from a coil transport trolley to a coil receiving surface.

[0034] In order to meet the diverse packaging needs of the production line, pallets of different specifications are needed to accommodate coils of different diameters. The turning machine needs to turn the coil to the pallet corresponding to the diameter of the coil. There is a defect that the center line of the coil is too far away from the center line of the pallet after the coil is placed on the pallet. When the center line of the coil is too far away from the center line of the pallet after the coil is placed on the pallet, the coil shakes during the turning process, and the coil is affected by the pallet, which can cause damage to the outer layer of the coil.

[0035] In order to solve the above problems, the present application provides an automatic centering system for a tray 30, hereinafter referred to as the system. The system is applied to a turning machine and includes a baffle 50, a controller and a fastening mechanism 60.

[0036] Please refer to Figure 1, the baffle 50 is arranged on the side of the tray receiving surface 12 facing the coil receiving surface 11, and protrudes from the coil receiving surface 11. The turning machine includes a plurality of conveying rollers 121 in a row, and the plurality of conveying rollers 121 in a row are used to move the tray 30. The plurality of conveying rollers 121 in a row are located on the tray receiving surface 12. The conveying rollers 121 are configured with a motor for driving. The motor is connected to the conveying rollers 121 for driving, and the conveying rollers 121 can be driven by the motor to rotate forward and reverse. The tray 30 is placed on the conveying rollers 121 of the tray receiving surface 12. When the tray 30 drives the conveying rollers 121 and moves toward the side of the tray receiving surface 12 facing the coil receiving surface 11, until the reference surface of the baffle 50 blocks the tray 30. The baffle 50 is provided with a reference surface for contacting the side of the tray 30 close to the coil receiving surface. At this time, the tray 30 is in the first position. When the tray 30 is in the first position, the tray 30 is close to the baffle 50. Please refer to Figure 5 , Figure 5 is a schematic diagram of the tray 30 in the first position, Figure 5 The dotted line in φ expresses the estimated spatial position of the coil 20 and the saddle 40 of the coil transport trolley, and shows the relative relationship between the estimated spatial position of the tray 30 and the coil 20 when the tray 30 is in the first position.

[0037] In the present system, the controller is connected to the motor drivingly connected to the conveying roller 121 , and the operation of the conveying roller 121 is controlled by the controller. Figure 6 3 is a schematic diagram of the tray 30 in the second position. When the tray 30 is in the second position, the tray centerline 321 is aligned with the coil centerline 21. The position of the coil centerline 21 in the coil 20 is certain. The tray centerline 321 refers to the centerline of the saddle in the tray 30 for receiving the coil 20. Figure 2 The centerline 321 of the tray is shown in FIG. Figure 2 When the tray includes two parallel supporting rods 32 , the center line 321 of the tray is the symmetry axis of the two supporting rods 32 , and the symmetry axis is located between the two supporting rods 32 .

[0038] The controller in this system can obtain the moving distance h2 of the tray 30 from the first position to the second position, and control the motor to move the tray 30 to the second position based on the moving distance h2. It can be seen that the second position is the key point of this solution. Please refer to Figure 5 and Figure 6 , at least the pallet application size h1, the coil radius r1 of the coil 20 at that time and the size of the relevant structure of the turning machine are needed to calculate the moving distance h2.

[0039] The fastening mechanism 60 is installed on the tray receiving surface 12, and the fastening mechanism 60 can be pressed against or away from the tray 30, so that the tray 30 is fixed relative to the conveying roller 121 or moves relative to the conveying roller 121. The fastening mechanism 60 has a relatively fastened state and a released state. The fastening mechanism 60 in the fastened state is used to fasten the tray 30 at the second position, and the fastening mechanism 60 in the released state is spaced from the tray 30.

[0040] In one mode of operation of the turning machine with this system, please refer to Figure 4 and Figure 5 , the coil transport trolley delivers the coil 20 to the top of the coil receiving surface 11, the coil 20 is relatively close to the coil receiving surface 11, and the coil 20 is still placed on the saddle 40 of the coil transport trolley. Figure 5 In the state shown, the relative positions of the coil transport trolley and the turning machine in the height direction are unique and unchanged, that is, the relative positions of the saddle 40 of the coil transport trolley and the coil receiving surface 11 of the turning machine in the height direction are unique and unchanged. Under the condition that the baffle plate 50 and the coil receiving surface 11 are relatively fixed, no matter which turning operation is performed, when the coil transport trolley and the turning machine are in Figure 5 In the state shown, the relative position of the baffle 50 and the saddle 40 of the coil transport trolley in the height direction is also unique and unchanged.

[0041] Therefore, the controller in the present system can calculate the relative distance between the coil centerline 21 and the saddle 40 of the coil transport trolley when obtaining the coil radius r1 of the coil 20 at that time and under the condition that the saddle 40 of the coil transport trolley remains unchanged. Figure 5 In the state of , the relative position of the baffle 50 and the saddle 40 of the coil transport trolley in the height direction is unique and unchanged, so the distance h3 between the baffle 50 and the center line 21 of the coil in the height direction can be calculated. The controller combines the tray application size h1 of the tray 30 adapted to the coil 20 at that time, and when the tray 30 is adjusted to Figure 6 In the second position shown, it can be known that the distance between the baffle 50 and the center line 21 of the coil in the height direction is the sum of the moving distance h2 and the above-mentioned pallet application size h1, and the moving distance h2 can be successfully calculated using the subtraction formula.

[0042] A specific working scheme of a turning machine with the present system is provided herein. First, the tray receiving surface 12 is placed in a horizontal state. Then, a tray 30 matching the diameter of the current coil 20 is placed on the tray receiving surface 12. The motor is controlled to rotate the conveying roller 121 to drive the tray 30 to move until the tray 30 is blocked by the baffle 50. At this time, the tray 30 is in the first position. Then, the controller calculates the current moving distance h2, controls the conveying roller 121 to move the tray 30 upward by the moving distance h2, so that the tray 30 is in the second position. The tray 30 is fixed in the second position by the fastening mechanism 60. Then, the turning machine is turned 90° and switched to the position as shown in FIG. Figure 1 In the state shown, the tray receiving surface 12 is in a vertical direction, and the coil receiving surface 11 is in a horizontal direction. Then the coil transport trolley delivers the coil 20 to the top of the coil receiving surface 11. The distance between the coil 20 and the coil receiving surface 11 is small, and the coil 20 is still placed on the saddle 40 of the coil transport trolley. Finally, the turning machine rotates. During this process, the support plate 111 located on the coil receiving surface 11 is lifted up, and the support plate 111 is connected with the coil 20. When the turning machine completes its rotation of 90°, the coil 20 is smoothly seated on the tray 30, achieving a smooth landing.

[0043] The working process of the system is not limited to the specific working scheme described in the previous paragraph, and can be adaptively adjusted according to the structure of the turning machine, such as directly placing the coil 20 on the coil receiving surface 11 of the turning machine.

[0044] This system ensures that the center line 21 of the coil is aligned with the center line 321 of the pallet, and can realize automatic centering of the pallet 30 and the coil 20, which not only reduces human intervention in the production process and reduces workload, but also improves the technical problem of excessive deviation between the center line 21 of the coil and the center line 321 of the pallet after the coil 20 is placed on the pallet 30, which is beneficial to improving the production efficiency of the production unit and improving the automation level of the production line.

[0045] It should be noted that the coil 20 in the present system includes but is not limited to an aluminum coil, and may also be a coil 20 of other materials.

[0046] In some embodiments, the motor is an AC motor, which can smoothly realize the forward and reverse rotation of the conveying roller 121 .

[0047] In some embodiments, see Figure 2 The pallet 30 includes two opposite bases 31 and two supporting rods 32 installed on the two bases 31. The two supporting rods 32 are opposite and parallel. Each supporting rod 32 is connected to the two bases 31. The two supporting rods 32 together constitute a saddle of the pallet 30, and the saddle of the pallet 30 is used to receive the coil 20.

[0048] In this system, when the tray 30 is in the first position, one end of the base 31 of the tray 30 is connected to the baffle 50. The tray application size h1 involved in the above system is Figure 2 It is reflected in Figure 2 The symmetry plane between the two support rods 32 is depicted in FIG. 1 , and the distance between one end of the base 31 connected to the baffle 50 and the symmetry plane is the tray application dimension h1.

[0049] In some embodiments, the automatic centering system of the tray 30 includes at least two baffles 50, and the at least two baffles 50 are spaced apart from each other. Figure 2 When the system includes two bases 31 and two supporting rods 32 , there are two baffles 50 in the system, and the two baffles 50 are opposite to the two bases 31 of the tray 30 .

[0050] In some embodiments, see Figure 1 The automatic centering system of the pallet 30 includes a first detection grating 70, which is installed on the pallet receiving surface 12. The first detection grating 70 is connected to the controller signal, and the detection light curtain 71 formed by the first detection grating is located on the pallet receiving surface 12. The first detection grating 70 is used to detect whether the pallet 30 exists on the pallet receiving surface 12. When the pallet 30 is placed on the pallet receiving surface 12, the pallet 30 will be within the range of the detection light curtain 71 formed by the first detection grating. The detection signal generated by the first detection grating 70 is transmitted to the controller. After the controller determines that the pallet 30 exists in the flip machine, the next step is performed.

[0051] In some embodiments, see Figure 1 The automatic centering system of the tray 30 includes a second detection grating 80, which is installed on the tray receiving surface 12. The second detection grating 80 is connected to the controller signal. The tray 30 includes a blocking surface that contacts the tray 30 when the tray 30 is close to the baffle 50 and is in the first position. The detection light curtain 81 formed by the second detection grating is close to the blocking surface. When the second detection grating 80 generates a detection signal, it means that the tray 30 is initially close to the blocking surface of the baffle 50. After the controller obtains this detection signal, it controls the conveying roller 121 to continue running for several seconds, so that the conveying roller 121 stops rotating after a delay. The delay time can be 2 to 3 seconds. Through this operation, the tray 30 is clearly aligned at the blocking surface of the baffle 50, ensuring that the tray 30 is in the first position, thereby improving the accuracy of the system.

[0052] In some embodiments, see Figure 1The fastening mechanism 60 includes at least two driving members and at least two clamps 61. The at least two driving members are installed on the flip frame 10. The at least two clamps 61 are connected to the at least two driving members respectively. Under the driving of the driving members, the at least two clamps 61 move closer to each other or farther away from each other to leave or press against the tray. When the at least two clamps 61 move away from each other, the at least two clamps 61 tighten the tray 30. When the at least two clamps 61 tighten the tray 30, the purpose of tightening the tray 30 in the second position is achieved. When the at least two clamps 61 move closer to each other, the clamps 61 separate from the tray 30, and the fastening of the tray 30 is released.

[0053] In some embodiments, the driving member in the fastening mechanism 60 is a cylinder.

[0054] In some embodiments, the controller includes a first controller and a second controller, the first controller is used to obtain the movement distance h2 of the tray 30 when it moves from a first position close to the baffle 50 to a second position when the center line 321 of the tray is aligned with the center line 21 of the coil, the second controller is connected to the first controller signal, and the second controller is connected to the motor control. The second controller obtains the movement distance h2 of the tray 30 when it moves from the first position close to the baffle 50 to the second position when the center line 321 of the tray is aligned with the center line 21 of the coil calculated by the first controller, and then controls the motor connected to the conveying roller 121 to operate.

[0055] The first controller includes but is not limited to a PLC. In the manner in which the packaging production line automatically wraps and packages the coil 20 and then transports the coil 20 to the turning machine for turning by the coil transporting trolley, the first controller may be a production line PLC of the packaging production line. The first controller may also be a computer or a single chip microcomputer.

[0056] In some embodiments, the second controller includes a frequency converter and an encoder. The frequency converter is connected to the first controller by signal, and the frequency converter is connected to the motor control, and the operation of the motor is controlled by the frequency converter. The encoder is connected to the frequency converter by signal, and the encoder is connected to the motor, and the operating parameters of the motor are monitored by the encoder to ensure that the tray 30 can be accurately moved from the first position to the second position.

[0057] The present embodiment also provides a turning machine, including a frame 90, a driving mechanism, a turning frame 10 and the above-mentioned automatic centering system for the pallet 30, wherein the driving mechanism is mounted on the frame 90, the turning frame 10 is rotatably mounted on the frame 90, the turning frame 10 is transmission-connected to the driving mechanism, the turning frame 10 includes an intersecting coil receiving surface 11 and a pallet receiving surface 12, the coil receiving surface 11 is provided with at least two pallets 111, at least two pallets 111 are spaced in sequence, the pallet receiving surface 12 is used to receive the pallet 30, the pallet receiving surface 12 is provided with a plurality of conveying rollers 121 in a row for moving the pallet 30, the automatic centering system for the pallet 30 includes a baffle 50, a controller and a fastening mechanism 60, the baffle 50 and the fastening mechanism 60 are both provided on the pallet receiving surface 12, and the controller is opposite to the turning frame 10.

[0058] The working scheme of the turning machine is consistent with a specific working scheme of the turning machine with the present system described above, and will not be described in detail here. By adopting the automatic centering system of the pallet 30 of the present application, the pallet 30 and the coil 20 can be automatically centered, which improves the technical problem that the center line 21 of the coil 20 deviates too much from the center line 321 of the pallet after the coil 20 is seated on the pallet 30.

[0059] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0060] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pallet automatic centering system, characterized in that: Applicable to a turning machine, the turning machine comprises a turning frame driven to rotate by a driving mechanism, the turning frame having a coil receiving surface for receiving a coil and a tray receiving surface intersecting with the coil receiving surface for receiving a tray; The automatic pallet centering system comprises: a baffle having a reference surface for contacting a side of the tray close to the coil receiving surface; A controller, wherein the turning machine includes a plurality of conveying rollers arranged in a row and located on the receiving surface of the tray for moving the tray, the controller is connected to a motor drivingly connected to the conveying rollers, the controller is used to obtain a moving distance of the tray when it moves from a first position close to the reference surface of the baffle to a second position when the center line of the tray is aligned with the center line of the coil, and control the motor to move the tray to the second position; A fastening mechanism is installed on the tray receiving surface, and the fastening mechanism can be pressed against or away from the tray to fix the tray relative to the conveying roller or move relative to the conveying roller.

2. The automatic pallet centering system according to claim 1, characterized in that: The controller comprises: A first controller is used to obtain a moving distance of the tray when it moves from a first position close to the baffle to a second position when a center line of the tray is aligned with a center line of the coil; The second controller is signal-connected to the first controller and is control-connected to the motor.

3. The automatic pallet centering system according to claim 2, characterized in that: The first controller is a PLC.

4. The automatic pallet centering system according to claim 2, characterized in that: The second controller comprises: A frequency converter, connected to the first controller by signal and connected to the motor by control; An encoder is connected to the frequency converter signal and to the motor.

5. The automatic pallet centering system according to claim 1, characterized in that: The automatic pallet centering system comprises: The first detection grating is installed on the tray receiving surface and is connected to the controller signal. The detection light curtain formed by the first detection grating is located on the tray receiving surface.

6. The automatic pallet centering system according to claim 1, characterized in that: The automatic pallet centering system comprises: A second detection grating is installed on the tray receiving surface and is connected to the controller signal. The tray includes a blocking surface that contacts the tray when the tray is close to the baffle and is in the first position. The detection light curtain formed by the second detection grating is close to the blocking surface.

7. The automatic pallet centering system according to claim 1, characterized in that: The fastening mechanism comprises: At least two driving members are mounted on the overturning frame; At least two clamps are connected to at least two driving members respectively. Under the driving of the driving members, at least two clamps move closer to each other or away from each other to leave or press against the tray.

8. The automatic pallet centering system according to claim 1, characterized in that: The automatic pallet centering system comprises at least two baffles, and the at least two baffles are spaced apart from each other.

9. The automatic pallet centering system according to claim 1, characterized in that: The motor is an AC motor.

10. A turning machine, characterized in that: include: frame; A driving mechanism, mounted on the frame; A turning frame is rotatably mounted on the frame and is in driving connection with the driving mechanism, the turning frame comprises a coil receiving surface and a tray receiving surface intersecting each other, the coil receiving surface is provided with at least two trays, at least two of the trays are sequentially spaced, the tray receiving surface is used to receive the tray, and the tray receiving surface is provided with a plurality of conveying rollers in a row for moving the tray; The automatic centering system for a pallet as described in any one of claims 1 to 9 comprises the baffle, the controller and the fastening mechanism, wherein the baffle and the fastening mechanism are both arranged on the pallet receiving surface, and the controller is opposite to the flip frame.

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