CN111908231A - Novel tension control method for high-speed intermittent traction - Google Patents

Abstract

The invention discloses a novel tension control method for high-speed intermittent traction. The specific structure of the tension control for high-speed intermittent traction is as follows: an unwinding mechanism, a tension mechanism, a tension storage mechanism, a traction roller mechanism and a punching device. The feeding mechanism is composed of servo motors, screw rods, buffer rollers, brackets and other parts. It is composed of air cylinder, tension sensor, etc., the traction roller mechanism is composed of servo motor, driving roller, passive roller, bracket and other parts, the punching device is composed of servo motor, cam mechanism, mold frame, mold, the present invention increases by adding The tension storage mechanism enables real-time adjustment of the tension during the punching process, and maintains a stable tension during the punching and traction process. In addition, the method has a simple structure and low cost.

Description

A Novel Tension Control Method for High-speed Intermittent Traction

technical field

The invention relates to the field of tension control, in particular to a novel tension control method for high-speed intermittent traction.

Background technique

At present, the tension control system of punching equipment in the lithium battery industry mainly includes: unwinding part, tension part, traction part, and punching part. The width dimension of a pole piece is pulled by the traction roller, and the punching part is punched once. This reciprocation. During the traction process, due to the gradual reduction of the material between the traction roller and the unwinding, the tension float will move upward. At this time, the sensor The feedback change value is controlled by the PID real-time operation to control the running speed of the unwinding, so that the tension mechanism maintains a balanced state. In the existing structure, the linear speed of the unwinding is equal to the linear speed of the traction roller. In the case where the traction speed is relatively high, the The hardware response requirements of the unwinding and tension mechanism are extremely high. At the same time, in order to obtain a constant tension, it is difficult to adjust the PID parameters, and a stable tension cannot be obtained, which makes the tension control of the high-speed and long-distance traction of the hardware high-speed die-cutting machine difficult, poor stability, and cost. high question.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a novel tension control method for high-speed intermittent traction, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted in the present invention is: a novel tension control method of high-speed intermittent traction, and the specific structure of the tension control of high-speed intermittent traction is: unwinding mechanism, tension mechanism, tension storage mechanism, traction roller mechanism and punching device, the tension storage mechanism is composed of servo motor, lead screw, buffer roller, bracket and other parts, and the unwinding mechanism is composed of unwinding air shaft, material coil, servo motor, material coil measurement sensor, etc. , The tension mechanism is composed of swing rollers, cylinders, tension sensors, etc., the traction roller mechanism is composed of servo motors, driving rollers, passive rollers, brackets, etc. The punching device is composed of servo motors, cam mechanisms, and mold bases , Mould composition.

Specifically, follow the steps below:

Step 1: Before starting work, the unwinding mechanism, the tension storage mechanism and the traction roller mechanism run at the synchronous speed V of the whole machine. The speed of the unwinding mechanism (1) is V0=V, the speed of the tension storage mechanism is V1=V, and the tension The storage mechanism is stationary, the speed of the tension storage mechanism is V1=0, and the traction roller mechanism V2=V.

Step 2: During the official operation, the traction roller mechanism is driven by the internal servo motor to rotate the driving roller, so that the coil material is fed forward by a length N of coil material. During the conveying process, when the lead screw on the tension storage mechanism (3) actively When a quantitative M is raised, the length of the coil provided by the buffer roller on the tension storage mechanism is M*2, and the length of the material supplied by the unwinding mechanism is N-M*2. Since M<N, it is the traction roller mechanism to the unwinding. The length of the coil material between the mechanisms decreases, the swing roller on the tension mechanism rises, and the tension sensor installed on the tension mechanism feeds back the detected tension signal to the user control end. Through PID operation, when the detected tension deviation is larger, the unwinding speed will increase. The larger V0 is, the smaller the tension deviation is, the smaller the unwinding speed V0 is, that is, the unwinding speed V0 is equal to the traction speed V2, the die-cutting servo motor on the punching device drives the up and down movement of the cam mechanism to complete the cutting of the pole piece forming.

In step 2, N<M*2, PID is the tension correction speed control amount.

Step 3, in the second step, when the speed V1 of the tension storage mechanism is reduced to 0, the speed V0 of the unwinding mechanism and the traction roller mechanism (4) V2 are also reduced to V1 at the same time, that is, V0=V1=V2= 0, the whole working process ends.

Compared with the prior art, the present invention has the following beneficial effects: by adding a tension storage mechanism, the present invention can adjust the size of the tension in real time during the punching process, and maintain a stable tension during the punching and pulling process. The method has simple structure and low cost.

Description of drawings

1 is a schematic structural diagram of a tension control method of a novel high-speed intermittent traction of the present invention;

In the figure: 1. Unwinding mechanism; 2. Tension mechanism; 3. Tension storage mechanism; 4. Traction roller mechanism; 5. Punching device.

Detailed ways

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

As shown in Figure 1, a new tension control method of high-speed intermittent traction, the specific structure of the tension control of high-speed intermittent traction is: unwinding mechanism 1, tension mechanism 2, tension storage mechanism 3, traction roller mechanism 4 and punching Device 5, the tension storage mechanism 3 is composed of a servo motor, a screw, a buffer roller, a bracket, etc., and the unwinding mechanism 1 is composed of an unwinding air shaft, a coil, a servo motor, and a coil measuring sensor, etc. , the tension mechanism 2 is composed of a swing roller, a cylinder, a tension sensor, etc., the traction roller mechanism 4 is composed of a servo motor, a driving roller, a passive roller, a bracket, etc., and the punching device 5 is composed of a servo motor, a cam mechanism, etc. , mold base, mold composition.

Specifically, follow the steps below:

Step 1: Before starting work, the unwinding mechanism 1, the tension storage mechanism 3 and the traction roller mechanism 4 run at the synchronous speed V of the whole machine, the speed of the unwinding mechanism 1 is V0=V, and the speed of the tension storage mechanism 3 is V1=V , the tension storage mechanism 3 is stationary, the speed of the tension storage mechanism 3 is V1=0, and the traction roller mechanism 4V2=V.

Step 2: During the official operation, the traction roller mechanism 4 is driven by the internal servo motor to rotate the active roller, so that the coil material is fed forward by a length N of the coil material. During the conveying process, when the lead screw on the tension storage mechanism 3 actively rises A quantitative M, at this time, the length of the coil provided by the buffer roller on the tension storage mechanism 3 is M*2, and the length of the material supplied by the unwinding mechanism 1 is N-M*2. Since M<N, it is the traction roller mechanism 4 to The length of the coil material between the unwinding mechanism 1 decreases, the swing roller on the tension mechanism 2 rises, and the tension sensor installed on the tension mechanism 2 feeds back the detected tension signal to the user control end. The larger the unwinding speed V0 is, the smaller the tension deviation is, the smaller the unwinding speed V0 is, that is, the unwinding speed V0 is equal to the traction speed V2, and the die-cutting servo motor on the punching device 5 drives the cam mechanism to move up and down. Complete the cutting and shaping of the pole piece.

In step 2, N<M*2, PID is the tension correction speed control amount.

Step 3, in the second step, when the speed V1 of the tension storage mechanism 3 is reduced to 0, the speed V0 of the unwinding mechanism 1 and the pulling roller mechanism 4V2 are also reduced to V1 at the same time, that is, V0=V1=V2=0 , the whole working process is over.

To sum up, the present invention adjusts the size of the tension by adjusting the up and down heights of the screw rod on the tension storage mechanism 3 during the discharging process. When the screw rod on the tension storage mechanism 3 rises or falls by a certain amount , the position of the swinging roller on the tension mechanism 2 will change, and the tension sensor installed on the tension mechanism 2 will send the detected tension signal to the control terminal. The roll speed is consistent with the pulling speed, so as to provide a stable tension during the punching and pulling process.

The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only for illustrating the present invention. In principle, without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (1)

1. A novel tension control method for high-speed intermittent traction is characterized by comprising the following steps: the tension control component of high-speed intermittent traction has the following specific structure: unwinding mechanism (1), tension mechanism (2), tension storage mechanism (3), traction roller mechanism (4) and die-cut device (5), tension storage mechanism (3) comprises parts such as servo motor, lead screw, cushion roller, support, unwinding mechanism (1) comprises unwinding inflatable shaft, material book, servo motor, material book measuring transducer etc. tension mechanism (2) comprises swing roller, cylinder, tension sensor etc. traction roller mechanism (4) comprises parts such as servo motor, drive roll, passive roller, support, die-cut device (5) comprises servo motor, cam mechanism, die carrier, mould.

The method is implemented according to the following steps:

before the work is started, the unwinding mechanism (1), the tension storage mechanism (3) and the traction roller mechanism (4) run at a complete machine synchronous speed V, the speed V0 of the unwinding mechanism (1) is equal to V, the speed V1 of the tension storage mechanism (3) is equal to V, the tension storage mechanism (3) is static, the speed V1 of the tension storage mechanism (3) is equal to 0, and the traction roller mechanism (4) V2 is equal to V.

Step two, when in formal work, the traction roller mechanism (4) drives the driving roller to rotate by an internal servo motor, so that the coiled material is sent to a coiled material by a length N, when a screw rod on the tension material storage mechanism (3) actively rises by a fixed amount M in the conveying process, the coiled material provided by a buffer roller on the tension material storage mechanism (3) has a length M2, the feeding length of the unwinding mechanism (1) is N-M2, because M < N, namely the coiled material length between the traction roller mechanism (4) and the unwinding mechanism (1) is reduced, a swinging roller on the tension mechanism (2) rises, a tension sensor arranged on the tension mechanism (2) feeds detected tension signals back to a user control end, and through PID operation, when the detected tension deviation is larger, the unwinding speed V0 is larger, when the tension deviation is smaller, the unwinding speed V0 is smaller, namely the unwinding speed V0 is equal to the traction speed V2, and a die cutting servo motor on the die cutting device (5) drives the cam mechanism to move up and down to finish the cutting and forming of the pole piece.

In the second step, N < M2, PID is the tension correction speed control quantity.

And step three, in the step two, when the speed V1 of the tension storing mechanism (3) is reduced to 0, the speed V0 of the emptying mechanism (1) and the speed V2 of the traction roller mechanism (4) are simultaneously reduced to V1, namely V0-V1-V2-0, and the whole working process is finished.

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