A method for automatically trimming a blanking line aluminum strip speed adaptation

Abstract

The application provides a method for automatically shearing the speed of an aluminum strip of a blanking line, and an aluminum strip conveying device for conveying an aluminum strip between a high-speed conveying end and a low-speed processing end. The device for conveying the aluminum strip comprises a plurality of parallel conveying belts, a fixed conveying guide roller set near the low-speed processing end, and a movable conveying guide roller set near the high-speed conveying end. The conveying surface of the movable conveying guide roller set is slightly higher than the conveying belts but slightly lower than the high-speed conveying end, so that the input aluminum strip first falls into the movable conveying guide roller set to slow down and then falls onto the conveying belts. The conveying surface of the fixed conveying guide roller set is lower than the conveying surface of the conveying belts. When the aluminum strip reaches the fixed conveying guide roller set through the conveying belts, the fixed conveying guide roller set lifts the aluminum strip off the conveying belts and sends the aluminum strip to the low-speed processing end at a speed that can match the low-speed processing end. The application can effectively avoid the impact force from scratching the surface of the aluminum strip when the aluminum strip slows down between different processes.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment technology, and in particular to a method for speed adaptation of aluminum strip in an automatic shearing and blanking line. Background Technology

[0002] When high-gloss aluminum strips are transferred between different processes, if the conveying speeds between processes are different, the surface of the aluminum strip may be scratched by the impact force caused by the acceleration or deceleration of the aluminum strip, which needs to be addressed. Summary of the Invention

[0003] This invention proposes a method for speed adaptation of aluminum strip in automatic shearing and blanking lines, which can effectively avoid scratching the surface of the aluminum strip due to the impact force when the aluminum strip decelerates between different processes.

[0004] The present invention adopts the following technical solution.

[0005] A method for speed adaptation of aluminum strip in an automatic shearing and blanking line is based on an aluminum strip transfer speed adaptation mechanism. The adaptation mechanism is an aluminum strip conveying device for conveying aluminum strip between a high-speed conveying end and a low-speed processing end. The aluminum strip conveying device includes multiple parallel conveyor belts, a fixed transport guide wheel group near the low-speed processing end, and a movable transport guide wheel group near the high-speed conveying end. The conveying surface of the movable transport guide wheel group is slightly higher than the conveyor belts but slightly lower than the high-speed conveying end, so that the aluminum strip input from the high-speed conveying end first falls into the movable transport guide wheel group to decelerate before falling onto the conveyor belts.

[0006] The conveying surface of the fixed transport guide wheel assembly is lower than that of the conveyor belt. When the aluminum strip reaches the fixed transport guide wheel assembly via the conveyor belt, the fixed transport guide wheel assembly lifts the aluminum strip off the conveyor belt and delivers the aluminum strip to the low-speed processing end at a speed that matches the low-speed processing end.

[0007] The conveyor belts are multiple and arranged in parallel; the fixed transport guide wheel group and the movable transport guide wheel group are arranged in parallel on the side of each conveyor belt, and each has a conveying surface formed by multiple brush wheels with good rotational flexibility for conveying aluminum belt and buffering the impact force of aluminum belt speed change; the brush wheels support the aluminum belt with densely distributed bristles on the surface to avoid scratching the aluminum belt.

[0008] The movable transport guide wheel assembly is equipped with a mechanism for driving the brush wheel to rotate. The brush wheel of the movable transport guide wheel assembly conveys the aluminum belt at a speed slightly higher than that of the conveyor belt but lower than that of the aluminum belt at the high-speed conveyor end. When the aluminum belt input from the high-speed conveyor end falls to the brush wheel of the movable transport guide wheel assembly, the aluminum belt is buffered by the brush bristles and decelerated by the rotation of the brush wheel before falling onto the conveyor belt. This reduces the speed difference between the high-speed conveyor end and the conveyor belt and avoids the impact force caused by the aluminum belt decelerating too quickly, which could scratch the surface of the aluminum belt.

[0009] The movable transport guide wheel assembly includes a positioning pin. After the distance between the movable transport guide wheel assembly and the high-speed conveying end is adjusted to the required distance, the movable transport guide wheel assembly is fixed in position by the positioning pin.

[0010] The fixed transport guide wheel assembly is equipped with a hydraulic device at the bottom. When the aluminum belt reaches the fixed transport guide wheel assembly via the conveyor belt, the hydraulic device drives the brush wheel of the fixed transport guide wheel assembly to lift up and contact the aluminum belt, lifting the aluminum belt away from the conveyor belt to avoid the aluminum belt being scratched by the surface of the conveyor belt during subsequent deceleration.

[0011] When the fixed transport guide roller assembly lifts the aluminum belt with brush wheels, the brush wheels of the fixed transport guide roller assembly are driven to rotate by the aluminum belt to reduce the kinetic energy of the aluminum belt and thus slow down the aluminum belt slightly.

[0012] After the aluminum strip reaches the low-speed processing end via the fixed transport guide roller group and the low-speed processing end completes the processing of the aluminum strip, the hydraulic device drives the brush wheel of the fixed transport guide roller group to descend, so that the processed aluminum strip falls back onto the conveyor belt and is transported by the conveyor belt.

[0013] The low-speed processing end uses a swing shear to cut the aluminum strip, and the cut aluminum strip is then conveyed to the stacking device via a conveyor belt.

[0014] The speed of the strip before it reaches the scissor blade: Vc, in m / min;

[0015] Sheet metal cutting length: L, in meters;

[0016] Length of movable transport guide wheel assembly: B, in meters;

[0017] The conveyor belt is a fixed conveyor belt, and the length of the fixed conveyor belt is A, in meters, and L≤A;

[0018] Fixed conveyor belt speed: V A The unit is m / min;

[0019] During the shearing process of the oscillating shear, the strip material is continuously transported and the oscillating shear continuously cuts. The oscillating shear uses its front measuring wheel to measure the length of the strip material passing through the oscillating shear blade to control the cutting length of the strip material. Let t0 be the time point when the oscillating shear blade closes to cut the strip material. Starting from time point t0, the oscillating shear automatically opens after cutting the strip material. The strip material is continuously transported forward before the oscillating shear. After the strip material is transported to the length of the sheet L, the oscillating shear closes again to cut the strip material. During this period, the oscillating shear continuously moves towards the oscillating shear blade closing position. If the strip material to be cut is long, the oscillating shear stops at the waiting position to wait.

[0020] During the shearing process of the swing shear, the conveyor belt after shearing transports the sheared sheet material to the stacker for stacking. The conveyor belt of the fixed conveyor belt has a conveying speed V. A >V c To allow sufficient time for stacking operations, the method for adapting the speed of aluminum strip on an automatic shearing and blanking line is used for the conveying speed V of a fixed conveyor belt. A The speed is balanced with the strip speed Vc before shearing to prevent the belt conveyor surface from scratching the aluminum strip sheet surface due to speed difference. The balancing method specifically includes the following steps.

[0021] Step S1: After the first piece of sheet material is scrapped, the shearing time is recorded as zero t0, which is also the zero point of the time for each subsequent piece.

[0022] Step S2: The movable transport guide wheel assembly is in a movable working condition and begins to fall at time zero t0 to begin receiving the strip material.

[0023] Step S3, duration t of the movable transport guide wheel assembly falling. b =B*60 seconds / V A , until t B Time point, duration in seconds, where t B =t b This ensures that the sheet material to be sheared passes completely through the movable transport guide roller assembly;

[0024] Step S4: The movable transport guide wheel assembly at time point t B The lifting starts at a certain time, and the lifting duration is t. a = (L / V) c -B / V A ) * 60 seconds, until t A Time point, where t A =t a +t b =L*60 seconds / V c This allows the sheet material to pass through the shear blades again;

[0025] The cycle of execution from step S1 to step S4 is calculated using the following formula:

[0026] Period T=t A =t a +t b =L*60s / V c Time node t A =t0;

[0027] t0 is the zero point of time, T is the time of a single cycle, and the second is seconds: the cycle starts when the t0 condition is met.

[0028] The fixed transport guide wheel assembly is fixed to the frame of the conveyor belt; the movable transport guide wheel assembly can be manually pulled to move its position.

[0029] This invention, through the supporting and buffering effect of the brush wheel, can effectively avoid scratches on the lower surface of the sheet material caused by the inconsistent transport speed between the conveyor belt and the aluminum strip (sheet material) between different processes, thereby solving the problem of aluminum strip speed matching in the automatic shearing and blanking line process of coil material. Attached Figure Description

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0031] Appendix Figure 1 This is a schematic diagram of the present invention;

[0032] Appendix Figure 2 This is a schematic diagram showing the corresponding stages of the formulas in steps S3 and S4.

[0033] In the diagram: 1-Movable transport guide wheel assembly; 2-Fixed transport guide wheel assembly; 3-Conveyor belt; 4-High-speed conveyor end; 5-Low-speed processing end. Detailed Implementation

[0034] As shown in the figure, a method for speed adaptation of aluminum strip in an automatic shearing and blanking line is based on an aluminum strip transfer speed adaptation mechanism. The adaptation mechanism is an aluminum strip conveying device for conveying aluminum strip between a high-speed conveying end 4 and a low-speed processing end 5. The aluminum strip conveying device includes multiple parallel conveyor belts 3, a fixed transport guide wheel group 2 near the low-speed processing end, and a movable transport guide wheel group 1 near the high-speed conveying end. The conveying surface of the movable transport guide wheel group is slightly higher than the conveyor belts but slightly lower than the high-speed conveying end, so that the aluminum strip input from the high-speed conveying end first falls into the movable transport guide wheel group for deceleration before falling onto the conveyor belt. The movable transport guide wheel group adjusts the deceleration distance of the aluminum strip by adjusting its distance from the high-speed conveying end.

[0035] The conveying surface of the fixed transport guide wheel assembly is lower than that of the conveyor belt. When the aluminum strip reaches the fixed transport guide wheel assembly via the conveyor belt, the fixed transport guide wheel assembly lifts the aluminum strip off the conveyor belt and delivers the aluminum strip to the low-speed processing end at a speed that matches the low-speed processing end.

[0036] The conveyor belts are multiple and arranged in parallel; the fixed transport guide wheel group and the movable transport guide wheel group are arranged in parallel on the side of each conveyor belt, and each has a conveying surface formed by multiple brush wheels with good rotational flexibility for conveying aluminum belt and buffering the impact force of aluminum belt speed change; the brush wheels support the aluminum belt with densely distributed bristles on the surface to avoid scratching the aluminum belt.

[0037] The movable transport guide wheel assembly is equipped with a mechanism for driving the brush wheel to rotate. The brush wheel of the movable transport guide wheel assembly conveys the aluminum belt at a speed slightly higher than that of the conveyor belt but lower than that of the aluminum belt at the high-speed conveyor end. When the aluminum belt input from the high-speed conveyor end falls to the brush wheel of the movable transport guide wheel assembly, the aluminum belt is buffered by the brush bristles and decelerated by the rotation of the brush wheel before falling onto the conveyor belt. This reduces the speed difference between the high-speed conveyor end and the conveyor belt and avoids the impact force caused by the aluminum belt decelerating too quickly, which could scratch the surface of the aluminum belt.

[0038] The movable transport guide wheel assembly includes a positioning pin. After the distance between the movable transport guide wheel assembly and the high-speed conveying end is adjusted to the required distance, the movable transport guide wheel assembly is fixed in position by the positioning pin.

[0039] The fixed transport guide wheel assembly is equipped with a hydraulic device at the bottom. When the aluminum belt reaches the fixed transport guide wheel assembly via the conveyor belt, the hydraulic device drives the brush wheel of the fixed transport guide wheel assembly to lift up and contact the aluminum belt, lifting the aluminum belt away from the conveyor belt to avoid the aluminum belt being scratched by the surface of the conveyor belt during subsequent deceleration.

[0040] When the fixed transport guide roller assembly lifts the aluminum belt with brush wheels, the brush wheels of the fixed transport guide roller assembly are driven to rotate by the aluminum belt to reduce the kinetic energy of the aluminum belt and thus slow down the aluminum belt slightly.

[0041] After the aluminum strip reaches the low-speed processing end via the fixed transport guide roller group and the low-speed processing end completes the processing of the aluminum strip, the hydraulic device drives the brush wheel of the fixed transport guide roller group to descend, so that the processed aluminum strip falls back onto the conveyor belt and is transported by the conveyor belt.

[0042] The low-speed processing end uses a swing shear to cut the aluminum strip, and the cut aluminum strip is then conveyed to the stacking device via a conveyor belt.

[0043] The speed of the strip before it reaches the scissor blade: Vc, in m / min;

[0044] Sheet metal cutting length: L, in meters;

[0045] Length of movable transport guide wheel assembly: B, in meters;

[0046] The conveyor belt is a fixed conveyor belt, and the length of the fixed conveyor belt is A, in meters, and L≤A;

[0047] Fixed conveyor belt speed: V A The unit is m / min;

[0048] During the shearing process of the oscillating shear, the strip material is continuously transported and the oscillating shear continuously cuts. The oscillating shear uses its front measuring wheel to measure the length of the strip material passing through the oscillating shear blade to control the cutting length of the strip material. Let the closing point of the oscillating shear blade be t0. Starting from time point t0, the oscillating shear automatically opens after cutting the strip material. The strip material is continuously transported forward before the oscillating shear. After the strip material is transported to the length of the sheet L, the oscillating shear closes again to cut the strip material. During this period, the oscillating shear continuously moves towards the closing position of the oscillating shear blade. If the strip material to be cut is long, the oscillating shear stops at the waiting position to wait.

[0049] During the shearing process of the swing shear, the conveyor belt after shearing transports the sheared sheet material to the stacker for stacking. The conveyor belt of the fixed conveyor belt has a conveying speed V. A >V c To allow sufficient time for stacking operations, the method for adapting the speed of aluminum strip on an automatic shearing and blanking line is used for the conveying speed V of a fixed conveyor belt. A The speed is balanced with the strip speed Vc before shearing to prevent the belt conveyor surface from scratching the aluminum strip sheet surface due to speed difference. The balancing method specifically includes the following steps.

[0050] Step S1: After the first piece of sheet material is scrapped, the shearing time is recorded as zero t0, which is also the zero point of the time for each subsequent piece.

[0051] Step S2: The movable transport guide wheel assembly is in a movable working condition and begins to fall at time zero t0 to begin receiving the strip material.

[0052] Step S3, duration t of the movable transport guide wheel assembly falling. b =B*60 seconds / V A until t B Time point, duration in seconds, where t B =t b This ensures that the sheet material to be sheared passes completely through the movable transport guide roller assembly;

[0053] Step S4: The movable transport guide wheel assembly at time point t B The lifting starts at a certain time, and the lifting duration is t. a = (L / V) c -B / V A ) * 60 seconds, until t A Time point, where t A =t a +t b =L*60 seconds / V c This allows the sheet material to pass through the shear blades again;

[0054] The cycle of execution from step S1 to step S4 is calculated using the following formula:

[0055] Period T=t A =t a +t b =L*60s / V c Time node t A =t0;

[0056] t0 is the zero point of time, T is the time of a single cycle, and the second is seconds: the cycle starts when the t0 condition is met.

[0057] The fixed transport guide wheel assembly is fixed to the frame of the conveyor belt; the movable transport guide wheel assembly can be manually pulled to move its position.

[0058] In this example, the aluminum strip is a sheet material, and the conveying surface formed by the brush wheels on the movable transport guide wheel assembly is slightly higher than the conveyor belt by 2 to 3 centimeters, while the brush bristles are elastic.

[0059] In this example, the fixed transport guide wheel group has a length of A, and the movable transport guide wheel group has a length of B. By moving the movable transport guide wheel group, the lengths of the two groups of devices are matched, and a sheet material with a maximum width and length of A+B can be produced.

[0060] In this example, when the movable transport guide wheel assembly moves toward the high-speed conveyor end, it can extend below the high-speed conveyor end.

Claims

1. A method for speed adaptation of aluminum strip in an automatic shearing and blanking line, based on an aluminum strip transfer speed adaptation mechanism, characterized in that: The adapter is an aluminum strip conveying device for conveying aluminum strip between a high-speed conveying end and a low-speed processing end. The aluminum strip conveying device includes multiple parallel conveyor belts, a fixed transport guide wheel assembly near the low-speed processing end, and a movable transport guide wheel assembly near the high-speed conveying end. The conveying surface of the movable transport guide wheel assembly is slightly higher than the conveyor belt but slightly lower than the high-speed conveying end, so that the aluminum strip input from the high-speed conveying end first falls into the movable transport guide wheel assembly to decelerate before falling onto the conveyor belt. The conveying surface of the fixed transport guide wheel assembly is lower than that of the conveyor belt. When the aluminum strip reaches the fixed transport guide wheel assembly via the conveyor belt, the fixed transport guide wheel assembly lifts the aluminum strip off the conveyor belt and delivers the aluminum strip to the low-speed processing end at a speed that matches the low-speed processing end.

2. The method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 1, characterized in that: The conveyor belts are multiple and arranged in parallel; the fixed transport guide wheel group and the movable transport guide wheel group are arranged in parallel on the side of each conveyor belt, and each has a conveying surface formed by multiple brush wheels with good rotational flexibility for conveying aluminum belt and buffering the impact force of aluminum belt speed change; the brush wheels support the aluminum belt with densely distributed bristles on the surface to avoid scratching the aluminum belt.

3. The method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 2, characterized in that: The movable transport guide wheel assembly is equipped with a mechanism for driving the brush wheel to rotate. The brush wheel of the movable transport guide wheel assembly conveys the aluminum belt at a speed slightly higher than that of the conveyor belt but lower than that of the aluminum belt at the high-speed conveyor end. When the aluminum belt input from the high-speed conveyor end falls to the brush wheel of the movable transport guide wheel assembly, the aluminum belt is buffered by the brush bristles and decelerated by the rotation of the brush wheel before falling onto the conveyor belt. This reduces the speed difference between the high-speed conveyor end and the conveyor belt and avoids the impact force caused by the aluminum belt decelerating too quickly, which could scratch the surface of the aluminum belt.

4. The method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 1, characterized in that: The movable transport guide wheel assembly includes a positioning pin. After the distance between the movable transport guide wheel assembly and the high-speed conveying end is adjusted to the required distance, the movable transport guide wheel assembly is fixed in position by the positioning pin.

5. A method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 2, characterized in that: The fixed transport guide wheel assembly is equipped with a hydraulic device at the bottom. When the aluminum belt reaches the fixed transport guide wheel assembly via the conveyor belt, the hydraulic device drives the brush wheel of the fixed transport guide wheel assembly to lift up and contact the aluminum belt, lifting the aluminum belt away from the conveyor belt to avoid the aluminum belt being scratched by the surface of the conveyor belt during subsequent deceleration.

6. A method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 5, characterized in that: When the fixed transport guide roller assembly lifts the aluminum belt with brush wheels, the brush wheels of the fixed transport guide roller assembly are driven to rotate by the aluminum belt to reduce the kinetic energy of the aluminum belt and thus slow down the aluminum belt slightly.

7. A method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 5, characterized in that: After the aluminum strip reaches the low-speed processing end via the fixed transport guide roller group and the low-speed processing end completes the processing of the aluminum strip, the hydraulic device drives the brush wheel of the fixed transport guide roller group to descend, so that the processed aluminum strip falls back onto the conveyor belt and is transported by the conveyor belt.

8. A method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 5, characterized in that: The low-speed processing end uses a swing shear to cut the aluminum strip, and the cut aluminum strip is then conveyed to the stacking device via a conveyor belt. The speed of the strip before it reaches the scissor blade: Vc, in m / min; Sheet metal cutting length: L, in meters; Length of movable transport guide wheel assembly: B, in meters; The conveyor belt is a fixed conveyor belt, and the length of the fixed conveyor belt is A, in meters, and L≤A; Fixed conveyor belt speed: V A The unit is m / min; During the shearing process of the swing shear, the strip material is continuously transported and the swing shear continuously shears. The swing shear uses its front measuring wheel to measure the length of the strip material passing through the swing shear blade to control the shearing length of the strip material. Let the closing cut point of the swing shear blade be t0. Starting from the t0 time point, the swing shear automatically opens after cutting the strip material. Before the oscillating shear, the strip is continuously conveyed forward. Once the conveyed length of the strip reaches the length L of the sheet, the oscillating shear closes again to cut the strip. During this process, the oscillating shear continues to move towards the oscillating shear blade closing position. If the strip sheet to be cut is long, the oscillating shear stops at the waiting position to wait.

9. A method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 8, characterized in that: During the shearing process of the swing shear, the conveyor belt after shearing transports the sheared sheet material to the stacker for stacking. The conveyor belt of the fixed conveyor belt has a conveying speed V. A >V c To allow sufficient time for stacking operations, the method for adapting the speed of aluminum strip on an automatic shearing and blanking line is used for the conveying speed V of a fixed conveyor belt. A The speed is balanced with the strip speed Vc before shearing to prevent the belt conveyor surface from scratching the aluminum strip sheet surface due to speed difference. The balancing method specifically includes the following steps. Step S1: After the first piece of sheet material is scrapped, the shearing time is recorded as zero t0, which is also the zero point of the time for each subsequent piece. Step S2: The movable transport guide wheel assembly is in a movable working condition and begins to fall at time zero t0 to begin receiving the strip material. Step S3, duration t of the movable transport guide wheel assembly falling. b =B*60 seconds / V A until t B Time point, duration in seconds, where t B =t b This ensures that the sheet material to be sheared passes completely through the movable transport guide roller assembly; Step S4: The movable transport guide wheel assembly at time point t B The lifting starts at a certain time, and the lifting duration is t. a = (L / V) c -B / V A ) * 60 seconds, until t A Time point, where t A =t a +t b =L*60 seconds / V c This allows the sheet material to pass through the shear blades again; The cycle of execution from step S1 to step S4 is calculated using the following formula: Period T=t A =t a +t b =L*60s / V c Time node t A =t0; t0 is the zero point of time, T is the time of a single cycle, and the second is seconds: the cycle starts when the t0 condition is met.

10. A method for speed adaptation of aluminum strip in an automatic shearing and blanking line according to claim 2, characterized in that: The fixed transport guide wheel assembly is fixed to the frame of the conveyor belt; the movable transport guide wheel assembly can be manually pulled to move its position.

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