Method of improving coiling creases in aluminum strip

Abstract

The application provides an implementation method for improving aluminum strip winding creases, a layer of foam glue is attached to the lower surface of a paper covering machine at the head of a second coil, so that the head of a first coil is accurately topped to the foam glue of the second coil during winding, and the creases of the head of the first coil and subsequent coils can be relieved due to the soft material of the foam glue, and it is proved that the winding crease problem can be greatly solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aluminum and aluminum alloy processing, and particularly relates to a method for improving aluminum strip winding creases. BACKGROUND

[0002] In the aluminum strip production line, when the strip is wound at the head, the head of the second coil and the head of the first coil overlap at the winding machine, where traces between layers are prone to occur, such defects are called winding creases, which result in unqualified product quality during the entire head winding process. SUMMARY

[0003] In order to solve the quality defect problem existing in the specific process of the prior art, combined with the actual production needs, the present application proposes a method for improving aluminum strip winding creases, which controls the paper covering machine to paste a layer of foam glue on the lower surface of the head of the second coil, so that the head of the first coil is accurately topped to the foam glue of the second coil during the winding process. Since the foam glue material is relatively soft, it can alleviate the creases of the first coil head and the subsequent number of coils. Practice has proved that it can greatly solve the winding crease problem.

[0004] The specific technical scheme is as follows:

[0005] A method for improving aluminum strip winding creases, characterized by controlling the paper covering machine to paste a layer of foam glue on the lower surface of the head of the second coil, so that the head of the first coil is accurately topped to the foam glue of the second coil during the winding process to alleviate the creases of the first coil head and the subsequent number of coils.

[0006] Further, the following device is used for implementation, comprising:

[0007] A tension roller group (1), a paper covering machine (2), a pinch roller (3), a photoelectric switch (4), a deflector roller (5), a winding core shaft (6), a coil trolley with a saddle (7), a laser range finder (8), a PLC controller, and a transmission device;

[0008] The tension roller group is used for conveying the outlet section strip and speed.

[0009] The paper covering machine is used to paste the foam glue along the longitudinal direction of the strip on the lower surface of the strip.

[0010] The pinch roller is used to pinch and convey the strip forward and backward.

[0011] The photoelectric switch is used to detect the presence or absence of the strip.

[0012] The deflector roller is used to change the movement direction of the strip and guide the winding machine.

[0013] The winding mandrel is driven to rotate by the uncoiler, and the sleeve (9) is transported and installed to the winding mandrel by the strip saddle trolley, and the strip is wound from a strip into a coil;

[0014] The PLC controller is used for logical calculation and control of the operation of the equipment;

[0015] The transmission device is used for controlling the operation of the tension roller group, the pinch roll, the deflector roll, the coiler and the strip saddle trolley.

[0016] Further, the method specifically comprises the following steps:

[0017] Firstly, the definitions are made,

[0018] The speed of the head of the outlet section of the outlet section is V;

[0019] The acceleration is a;

[0020] The distance from the laser range finder to the middle point of the winding mandrel is D, which is a constant;

[0021] The distance from the laser range finder to the surface of the sleeve is D2;

[0022] The radius of the winding mandrel and the sleeve in the working state is D1;

[0023] The distance from the strip head to the displacement when the strip head accelerates from zero speed to V and then decelerates to zero is S;

[0024] The distance from the photoelectric switch to the paper covering machine is L0;

[0025] Step 1: The strip head stops when it runs to the photoelectric switch Y:

[0026] The controller calculates the circumference C required for the first winding as C = 2πD1 (Formula One)

[0027] The controller calculates the radius D1 of the mandrel in the working state as D1 = D-D2 (Formula Two)

[0028] Step 2: The strip head retreats, and the distance of the retreat at this time is L = L0-C (Formula Three)

[0029] There are two cases:

[0030] (1) When L≤S, according to the relationship between displacement and acceleration, it can be divided into two sections, an acceleration section S1 and a deceleration section S2:

[0031] L = S1 + S2 = 1 / 2at12 + 1 / 2at22 (Formula Four)

[0032] t1 = t2 = 1 / 2t (Formula Five) t1 is the acceleration time, and t2 is the deceleration time;

[0033] The time of the backward of the outlet section is calculated by (formula one), (formula two), (formula three), (formula four), (formula five)

[0034] The value is used for controlling the tension roller and the speed of the whole outlet section for rotating the strip;

[0035] (2) When L>S, according to the relationship between displacement and acceleration, it is divided into three sections, the acceleration section S1, the deceleration section S2 and the uniform speed section S3:

[0036] L=S1+S2+S3=1 / 2at12+1 / 2at22+Vt3 (formula seven)

[0037] t=t1+t2+t3 (formula eight) t1 is the time required for the tension roller to accelerate to V, t2 is the time required for the tension roller to stop from V to 0, and t3 is the time of the uniform speed operation of the tension roller:

[0038] t1=t2=V / a (formula nine)

[0039] The time of the backward of the outlet section is calculated by (formula one), (formula two), (formula three), (formula seven), (formula eight) and (formula nine):

[0040]

[0041] According to (formula eight), (formula nine) and (formula ten):

[0042]

[0043] The value is used for controlling the tension roller and the speed of the whole outlet section for rotating the strip;

[0044] The third step is that the paper covering machine covers a layer of foam rubber on the lower surface of the strip at the position.

[0045] The fourth step is to start the head winding action, and the winding machine is controlled at a speed of 1.05-1.1 times of V, and the other transmission rollers of the outlet section are controlled at a speed of V of the tension roller group.

[0046] The present application and its preferred schemes cover a layer of foam rubber on the lower surface of the second circle at the head position, so that the head of the first circle is accurately positioned at the foam rubber of the second circle during the winding process. Since the foam rubber material is soft, the creases of the first circle head and the subsequent circles can be relieved, and it is proved that the winding crease problem can be solved to a great extent. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 The present application and its preferred schemes cover a layer of foam rubber on the lower surface of the second circle at the head position, so that the head of the first circle is accurately positioned at the foam rubber of the second circle during the winding process. Since the foam rubber material is soft, the creases of the first circle head and the subsequent circles can be relieved, and it is proved that the winding crease problem can be solved to a great extent. DETAILED DESCRIPTION

[0048] In order to make the features and advantages of the present patent more apparent, the following detailed description is made with reference to the preferred embodiments.

[0049] The embodiment of the present application provides an implementation method for improving aluminum strip coiling creases, and is applied to the actual production field to improve the stability of product quality.

[0050] The device based on the embodiment comprises a tension roller set 1, a paper covering machine 2, a pinch roller 3, a photoelectric switch 4, a deflector roller 5, a coiling mandrel 6, a strip saddle coiling trolley 7, a laser range finder 8, a PLC controller and a transmission device.

[0051] The tension roller set is used for conveying the strip at the outlet section and the speed.

[0052] The paper covering machine is used for pasting foam glue on the lower surface of the strip along the longitudinal direction of the strip.

[0053] The pinch roller is used for clamping and conveying the strip forward and backward.

[0054] The photoelectric switch is used for detecting whether the strip exists.

[0055] The deflector roller is used for changing the movement direction of the strip and guiding the coiling machine.

[0056] The coiling mandrel is driven to rotate by an uncoiler, and the sleeve 9 is transported and installed on the coiling mandrel by the strip saddle coiling trolley, so that the strip is coiled from a strip shape to a roll shape.

[0057] Preferably, the PLC controller can be a Siemens 400 series or the like, and is used for logical calculation and control of the operation of the device.

[0058] The transmission device is used for controlling the operation of the tension roller set, the pinch roller, the deflector roller, the coiling machine and the strip saddle coiling trolley.

[0059] Based on the preferred device design, the specific implementation steps of the present application are as follows:

[0060] Firstly, the definitions are as follows,

[0061] The speed of the head of the outlet section is V, m / min.

[0062] The acceleration is a, m / min2.

[0063] The distance from the laser range finder to the middle point of the coiling mandrel is D, m (the value is a constant)

[0064] The distance from the laser range finder to the surface of the sleeve is D2, m.

[0065] The radius of the coiling mandrel and the sleeve in the working state is D1, m.

[0066] The distance from zero speed to V is S, m;

[0067] The distance from the photoelectric switch to the paper covering machine is L0, m.

[0068] First step: the tape head stops at the photoelectric switch Y:

[0069] The controller calculates the circumference of the first loop as C = 2πD1 (Equation 1)

[0070] The controller calculates the radius of the mandrel in working condition as D1 = D - D2 (Equation 2)

[0071] Second step: the tape head needs to retreat, and the distance of retreat is L = L0 - C (Equation 3)

[0072] There are two cases:

[0073] (1) L ≤ S, according to the relationship between displacement and acceleration, it can be divided into two sections, the acceleration section S1 and the deceleration section S2:

[0074] L = S1 + S2 = 1 / 2at12 + 1 / 2at22 (Equation 4)

[0075] t1 = t2 = 1 / 2t (Equation 5) t1 is the acceleration time, and t2 is the deceleration time

[0076] The time of retreat at the exit section is calculated from (Equation 1), (Equation 2), (Equation 3), (Equation 4), and (Equation 5)

[0077] This value is used to control the tension roller and the speed of the entire exit section for rotating the tape.

[0078] (2) L > S, according to the relationship between displacement and acceleration, it can be divided into three sections, the acceleration section S1, the deceleration section S2, and the constant speed section S3:

[0079] L = S1 + S2 + S3 = 1 / 2at12 + 1 / 2at22 + Vt3 (Equation 7)

[0080] t = t1 + t2 + t3 (Equation 8) t1 is the time required for the tension roller to accelerate to V, t2 is the time required for the tension roller to stop from V to 0, and t3 is the time for the tension roller to run at a constant speed:

[0081] t1 = t2 = V / a (Equation 9)

[0082] The time of retreat at the exit section is calculated from (Equation 1), (Equation 2), (Equation 3), (Equation 7), (Equation 8), and (Equation 9):

[0083]

[0084] According to (Formula Eight), (Formula Nine), (Formula Ten) can be obtained:

[0085]

[0086] The value is used to control the tension roller and the rotation of the entire outlet section to drive the strip.

[0087] Step 3: Control the paper covering machine to cover a layer of foam adhesive on the lower surface of the strip at this position;

[0088] Step 4: Start the head winding action, and the winding machine is controlled at a speed of 1.05-1.1 times V, and the other driving rollers of the outlet section are controlled at a speed of V of the tension roller group.

[0089] The above method can accurately control the paper covering machine to cover a layer of foam adhesive on the lower surface at the head of the second coil, so that the head of the first coil is accurately positioned on the foam adhesive of the second coil during winding. Since the foam adhesive has a soft material, the creases between the first coil head and the subsequent coils can be relieved, thereby achieving the purpose of the present application and solving the problems found in the background art.

[0090] The present patent is not limited to the above best embodiment, and anyone can derive other various forms of improved aluminum strip winding crease implementation methods under the inspiration of the present patent. Any equivalent changes and modifications made within the scope of the present patent application should be included in the scope of the present patent.

Claims

1. A method of improving the implementation of a coil set mark in an aluminum strip, characterized by: By controlling the lower surface of the paper covering machine to paste a layer of foam glue at the head of the second coil, the head of the first coil is accurately topped to the foam glue of the second coil during the winding process to relieve the crease between the head of the first coil and the subsequent coils; The following device is adopted to realize the method, comprising: a tension roller group (1), a paper covering machine (2), a pinch roller (3), a photoelectric switch (4), a deflector roller (5), a winding core shaft (6), a strip carriage with a saddle (7), a laser range finder (8), a PLC controller, and a transmission device; The tension roller group is used to transport the outlet section strip and control the speed of the outlet section strip. The paper covering machine is used to paste the foam glue along the longitudinal direction of the strip on the lower surface of the strip. The pinch roller is used to clamp and transport the strip forward and backward. The photoelectric switch is used to detect whether the strip exists. The deflector roller is used to change the movement direction of the strip and guide the winding machine. The winding core shaft is driven to rotate by the uncoiler, and the sleeve (9) is transported and installed to the winding core shaft by the strip carriage with a saddle, so that the strip is wound from a strip shape to a roll shape. The PLC controller is used for logical calculation and control of the operation of the equipment. The transmission device is used to control the operation of the tension roller group, the pinch roller, the deflector roller, the winding machine, and the strip carriage with a saddle. Specifically, the following steps are included: First, define, When the head winding action starts, the speed of the outlet section is V. The acceleration is a. The distance from the laser range finder to the middle point of the winding core shaft is D, and the value of the distance is a constant. The distance from the laser range finder to the surface of the sleeve is D2. In the working state, the radius of the winding core shaft and the sleeve together is R1. The distance of the strip head from zero speed to V and then to zero speed is S. The distance from the photoelectric switch to the paper covering machine is L0. First step: stop when the strip head runs to the photoelectric switch: The controller calculates the circumference of the first coil that needs to be wound as C=2πR1 (Formula I) The controller calculates the radius of the core shaft in the working state as R1=D-D2 (Formula II) Second step: the strip head retreats backward, and the distance of the backward retreat is L=L0-C (Formula III) There are two cases: (1) L≤S, according to the relationship between displacement and acceleration, it can be divided into two sections, the acceleration section S1 and the deceleration section S2: L=S1+S2=1 / 2at1²+1 / 2at2² (Formula IV) t1=t2=1 / 2t (Formula V) t1 is the acceleration time, and t2 is the deceleration time. Calculate the time of the outlet section backward retreat according to (Formula I), (Formula II), (Formula III), (Formula IV), and (Formula V): t= (Formula Six), which value is used to control the tension roller and the speed of the entire exit section; (2) L>S, according to the relationship between displacement and acceleration, it can be divided into three sections, the acceleration section S1, the deceleration section S2, and the uniform speed section S3: L=S1+S2+S3=1 / 2at1²+1 / 2at2²+Vt3 (Formula VII) t=t1+t2+t3 (Formula VIII) t1 is the time required for the tension roller to accelerate to V, t2 is the time required for the tension roller to stop from V to 0, and t3 is the time required for the tension roller to run at a uniform speed: t1=t2=V / a (Formula IX) Calculate the time of the outlet section backward retreat according to (Formula I), (Formula II), (Formula III), (Formula VII), (Formula VIII), and (Formula IX): t3= (Formula Ten) According to (Formula VIII), (Formula IX), and (Formula X), we get: t = t1+ t2+ t3= 2V / a+ (Formula Eleven) Third step: control the paper covering machine to cover a layer of foam glue on the lower surface of the strip at this place; Fourth step: start the head winding action, the winding machine is controlled at 1.05-1.1 times the speed of V, and the other transmission rollers in the outlet section are controlled at the speed V of the tension roller group.

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