JPS59143837A - Winding control for web and its device - Google Patents

Abstract

PURPOSE:To achieve a high quality winding operation by controlling tension of web and contact pressure etc. according to the result of comparison between the actually wound diameter and the prescribed value obtained from the wound diameter of a winding roll, a wound length, and the average thickness of the web etc. that may suffer from secluar changes. CONSTITUTION:While winding the web (W) around the roll core 2, the first and second rotating speed detector 10 and 11 detect rotating speeds of the roll core 2 and web feeding roller 1, V and Vo respectively, and the length detector 12 detects the length of the wound veb by using the total number of revolutions of the roller 1. These output signals from the detectors 10, 11, 12 are input in the microcomputer 16 together with each output signal from a thickness setting device 13 which sets the product of average thickness (t) of the web (W) by a constant 4/pi in form of an electric signal, from a roll core diameter setting device 14 shich set the diameter (d) of the roll core 2, and from a density setting device 15 which sets the desired density of winding (rho). Then, the value (4tl/pirho+ d<2>)<1/2> is operated through a microcomputer 16 and respective adjusting mechanisms for tension and contact pressure are controlled according the result of comparison between thus operated value and wound diameter D.

Description

[Detailed description of the invention]

The present invention relates to a winding control method for winding up webs while maintaining high quality, and a winding control device suitable for implementing the method. When discussing the quality of a winding roll made by winding a web, emphasis is placed on the quality from its appearance and the quality of the web itself to ensure that there is no 71 f゜ during winding. It can be divided into seven substantive qualities. The former concerns the winding wrinkles of the winding roll and the alignment of the edges. Factors that play a role in this include the arrangement of the rollers and the drive system. Itto/Latter 01 This relates to shrinkage when the web is unrolled from the take-up roll, and the degree of sagging due to changes over time during winding. Examples include sword style. Recently, the demands of users such as 1J' and others have become that the quality of the winding roll web should be at m-point Ti. There are many fine details such as uniformity and appropriate winding hardness, so the setting of tension and contact pressure when winding must be done rationally and scientifically. In general, the reality is that we rely on methods such as selecting appropriate values based on data obtained from actual results and experience that we have cultivated over many years, and determining the product that meets our needs through repeated experiments. However, there are various problems such as it being unscientific and the quality differing depending on the skill of the driver, and it takes a lot of effort to obtain highly reliable data regarding winding. The loss of time and product is not insignificant, and from this point of view, it is strongly desired to develop a winding system that can take into account the quality of the web itself of the winding roll. However, no suitable solution has yet been proposed, and this remains an issue that must be resolved by all concerned parties. In view of this actual situation, the present inventor has conducted various studies in order to provide a rational and scientific winding control system for maintaining high quality, and as a result has completed the present invention. This makes it possible to perform winding while automatically and rationally applying appropriate winding tension and contact force (-1:J), and to extend the length of the winding reweb over the entire length of the winding reweb. This ensures a high level of quality. However, the present invention

[In order to achieve this purpose, we directly control the winding density based on the fact that the winding density has a correlation with the winding hardness and is an important factor that affects the quality of the web. This is a specific winding rJ system characterized by the following configuration. In other words, during the winding process in which the web is wound around the core without applying tension or contact pressure, the winding diameter (island and winding length) of the winding roll that changes over time is continuously detected. Here, the average thickness of this web (tJ), the outer diameter (d) of the winding core and the circumference (π) are constants, and the winding density (ρ is the set number) is the value of 4t'A + 627M (I πe Calculated by a microcomputer, this value (A) is continuously compared with the winding diameter (DJ), and depending on whether the winding diameter (DJ) is large or small, the winding density # of the winding roll is set to the set value. This is a control method that increases or decreases at least one of the tension and the contact force so that the calculated value (A) and the winding diameter (DJ) match, assuming that the small force (small force) is large compared to the above-mentioned winding diameter (DJ). The present invention includes a tension adjustment mechanism that can increase or decrease the torque applied to the winding core, a contact pressure adjustment mechanism that can increase or decrease the contact force of the touch roller, and the rotational speed (V) of one winding core.
The first rotational speed detector detects the rotational speed fi [Vo] of the web feeding roller, and detects the diameter! A second rotational speed detector that converts an electrical signal multiplied by Do), and a length detector that detects the number of rotations on the abrasive surface of the web feeding roller and converts it into an electrical signal corresponding to the nib winding length. The vessel and
A thickness setting device sets the product of the average web thickness (1) and a constant (7), a core diameter setting device sets the entire winding core diameter (d), and a desired winding density is set. a density setter, a microcomputer that receives electrical signals from the detector and setter as information, performs predetermined calculations, and then issues a control output; and a tension adjustment mechanism that receives the control output of the microcomputer. A control device is constituted by a tension control program system that controls the tension control program system and a contact force control program system that controls the contact force adjustment mechanism in response to the control output of the microcomputer, and the microcomputer Another feature is that the corresponding electric signal is appropriately divided and outputted into the control output to the tension control program system, the contact pressure control, and the control output to the program system. In this way, it is possible to always match the winding density (ρ) of the winding roll to a desired value throughout the winding process, thereby achieving the objective G of stably maintaining web quality.
．． Ru. In this specification, there is a correlation between the winding density and the hardness of the winding layer of the winding roll. It is clear that the value is less than 1 in the case of flexible winding with many intervening parts, and the value is more than 1 in the case of hard winding where the tension and contact force are doubled. However, the winding density (p) of the lever can be defined by the following equation. In this equation, the denominator on the right side is the total cross-sectional area of the wound web, -10,000, and the numerator is 6 turns of the winding roll.
° To 2-
1 - It is the cross-sectional area of the part excluding the core. The above factors t, t, and d are values unrelated to the tension value and contact force, and DG and other factors during winding are all taken into account when the winding roll is completed. It's easy to understand. Therefore, it is easy to calculate the winding density (ρ) by knowing each factor related to a standard product.Hereinafter, an example of a winding control device according to the method of the present invention will be explained based on the attached drawings. In addition, aspects of the winding control method will be described. Fig. 1 is an example of a control device for winding 0 pieces and 1 lil J. It is a schematic structural diagram of a winding machine with all the equipment. A pair of rollers [R,], (R2+) are placed in the web feed-out roller (1) and a cylindrical winding core (2), which is disposed at the winding position, is attached temporarily to rotate the web for winding. a winding shaft (4), a touch roller (5) parallel to the winding shaft (4) and movable toward and away from the winding shaft (4), and a motor (5) that applies rotational force to the winding shaft (4). A winding machine of a central winding type is constituted by comprising a winding core including a winding core (6), a drive system, and an air cylinder (7) for moving the one-touch roller (5) toward and away from each other. The system is equipped with a tension adjustment mechanism (81) that transmits torque in a stepless manner, such as an electromagnetic clutch, related to the output shaft of the motor (6), and an air cylinder (7+). Pneumatic line G coated roller (
51 winding roll 3N: Contact pressure to stepless G
It is equipped with a contact pressure adjustment mechanism (9+) that can increase or decrease this, and uses an electro-pneumatic converter that can convert the illustrated example G2-primary air pressure (P1) into a decreased secondary air pressure (P2). 7)) (The tension adjustment mechanism (8+) and the contact force adjustment mechanism i91 are activated in the configured winding machine to appropriately adjust the winding tension of the web (clasp) and the contact force to the winding roll (3i). By doing so, it is possible to obtain a winding roll (3) having a predetermined hardness and a defined degree of air entrainment. In addition to the tension adjustment mechanism (8) and the contact force adjustment mechanism (9), the control device that continuously controls the density continuously detects the rotational speed (V) of the one-turn core (2'') and sends an electric signal. Continuously detects the first rotational speed detector (10+) and the rotational speed 1a-'Vo of the web feeding roller (11) and converts it into an electrical signal multiplied by its diameter [D,)'fi: a second rotational speed 82 output device (11); a length detector (12) that detects the number of rotations in the rolling direction of the web feeding roller (1) and converts it into an electrical signal corresponding to the web winding θ length;
A thickness setting device (13) that sets the product of the average thickness 'iJ (t) of the web (W) and a constant -(-] using an electrical signal, and a diameter (d) of the winding core f21 using an electrical signal. A winding core diameter setting device (14) and a sound intensity setting device (15) capable of setting a desired winding density (ρ) with an electric signal are provided as control input signal elements, and each of the detectors (20+, (III,
f12] and each of the setting devices (+37. (+41.
A microcomputer receives each electrical signal If+l as information, performs predetermined calculations, and then issues a control output.
16), and in response to this control output, the front 1 tension adjustment mechanism (
a tension control program system 07) that controls 81;
A contact pressure control program system (TATOOBIKO TIi') that receives the control output and controls the contact pressure adjustment mechanism (J).
;b. The microcomputer group [Ko basic Ni0PJJ (
It consists of a central processing unit, memory, and an interface, and the interface includes each of the detectors (
10) to (12) and each setting device (13) to 05) as an electric signal or a digital signal. - A program to control the memory c=c-acpU has been written into the cptr, and according to this program data is exchanged with the Lee memory which has fetched the necessary data from the interface. Performs arithmetic processing and outputs the processed data to the output port of the interface. This output boat & ZCPU receive the nine output boat designation signals given to it, temporarily store the data in that boat, and output it to the -DyAK converter to convert the digital signal into an analog signal and output it as a control blade. Teiwa. As the arithmetic processing means is shown in FIG. 2, the microcomputer 06) reads each detector (]01. It takes in a signal, performs the following calculations in sequence, and outputs a control output to both program systems Q71.(18). The arithmetic circuit (23) calculates the winding diameter [DJ] of the winding roll (3) at the detection point by dividing CvoDθ by the electric signal (Vl) from the first rotational speed detector (10j). After multiplying the electric signal (V) of the thickness setting device (13) read from the length detector (12j and memory 711) by the multiplication circuit (24), this value (
[square] is divided by the electric signal (ρ) of the density setter (151) read from the memory by the dividing circuit (25). At the same time as the above calculation is performed, the square circuit (12G) Multiply the read core diameter setting device (14) by the electric signal (d). Then, process this calculated value (d2) and the division circuit (calculated value at 251) by the square root calculation circuit (28). Illusion!+
- Obtain the value (A) of d2)%πρ. The above value σ is determined by the winding diameter (IJη) as is clear from the above formula (IJη
Needless to say, it corresponds to ko. After that, the value (29) is compared with the result value ('D) of the division circuit (23), and the electric signal f corresponding to the difference between them is outputted as an analog quantity. , this analog H & CO tension control program system Q card return switch 10 control program system (formed to be sent as a control output that is appropriately divided including the total amount j distribution to -10,000 for pigeons) In this case, the tension control program system is an open control system that uses α force, for example, the winding diameter (DJ and the tension set by adding the tension setting device) as input elements, from a multiplication circuit (22). (The target tension G is roughly determined according to the material in use, and the contact pressure control program system (18) is an oven control system that uses the contact pressure setting device 08) as an element. Similarly to the tension, the contact force can be set to an appropriate value T.The following is an explanation of the interlocking movement that controls the winding density using the winder configured as described above. Both systems Q71
．． (18) At the same time as the winding is started under the setting condition
Equation ~ (The microcomputer receives the electric signal from 151 (161) and synchronizes with the basic clock pulse C to perform predetermined calculations moment by moment, and the resulting value J (''-!
The difference between '-+ a%%πρ and the winding diameter (D) activates the control output J'r5+ 1-, and when the winding diameter (Dl) is larger than
) means that the winding density (p) of
The adjustment is made between the force and (187 Jl), thus increasing the winding tension and the contact force by at least -1.On the contrary, when the winding diameter (DJ's blade is small) The control for making the winding density match the set value is carried out almost continuously in synchronization with the basic clock pulse. What proportional division ratio should be applied to the control output k of θG), the tension control system and the contact pressure control system? However, it is of course possible to operate sequentially, for example, by performing priority control and then switching to the other control. If the winding density is known, by setting the same winding density (ρ), a rewind product with the same conditions can be obtained, but it is also possible to use so-called Taber winding, which gradually decreases according to the roll thickness. It is possible, and in this case, it can be done automatically by transforming the density setting device 05 as shown in Figure 3. Then, it changes proportionally to the winding diameter.
When decreasing gradually (this will be according to the formula below. p=po(z-α ID -d> ) -・--
−0−= (y) However, −e. : Density of initial diameter α : Density setting device (+5) with all the above formulas applied, density setting device of initial diameter (30), density reduction rate setting device (31), etc. The output [ρ.α] of the multiplication circuit (321) and the multiplication circuit (32) that multiplies the outputs of the setters (30) and (31) by n is multiplied by the winding diameter (I) l. 331, a multiplication circuit (3) for multiplying the output (ρ0αJ) of the multiplication circuit (32) by the winding core diameter (dJ), and an inverter (3ω) for inverting the polarity of the output (ρ0αD) of the multiplication circuit (33).
output of the inverter (35) (-ρoQ!DJ
and the output of the multiplication circuit (34I/(ρ0αd)), and the output of this summation circuit (36) (ρo(11!d-ρ.α-DJ) and the density setter (30
) and the output (ρ.) of the summation circuit (3 forces and 1
J) is formed. The output (ρ.+ρ.αd-ρ0αD) of the density setter (15J'G) having such a structure corresponds to the above formula Cf, and the - of the multiplication circuit (33) is The division times j% in Fig. 2 to the input terminal of 1, <23
In addition to guiding the output of It is possible to perform so-called taper winding in which the winding density gradually decreases depending on the thickness. As described above, according to the present invention, the winding I during the single winding operation
Since it is possible to control the winding so that the J density matches the set value/), it is possible to directly control the winding ratio/#, which is determined as the overall result of the winding tension, touch roller contact force, and winding method.G : [, S on the quality of the product! This is an innovative method for scientifically controlling the quality of winding, and compared to conventional winding methods that relied on experience and intuition, winding is performed that maintains the quality that meets the user's side wave requests. It is a very useful tool to improve your skills. Since the winding operation can be performed using numerical control in this way, it is possible to operate easily and repeatedly based on data without being affected by the skill level of the operator, which leads to improved productivity. This method has many advantages, and the practical effects of this method are remarkable, as it reduces the number of defective products and enables a winding operation with stable quality and high yield.

[Brief explanation of drawings]

- Fig. 1 & 1 A schematic structural diagram of a winding machine according to one embodiment of the present invention, the second text shows a diagram of the microcomputer in Fig. 1, and the third text shows another embodiment of the present invention. It is a flow diagram of the main part of the mooring control circuit. (1)...Tip feed roller, (2)...Winding core. (3)...Take-up reroll, '[151...Touch roll. (8]...Tension adjustment mechanism, (9) Contact pressure adjustment mechanism. +101... First rotation speed detector. (111... Second rotation speed detector. (12j... Length detector, (+31... Thickness setting device. (14j... core diameter setting device, (15j) density setting device. [16 units... micro core h, 1-ta. αη... tension control program system. ...Contact pressure control program system. Fig. 1 2 Fig. 2 Fig. 3

Claims (1)

[Claims] / Web CW + full core (without applying tension and contact pressure)
21, the winding diameter [D] and winding length (G) of the winding roll (3) are continuously detected, and the winding diameter (D) and winding length (G) of the winding roll (3) are continuously detected. f
The outer diameter (d) and the uniformity ratio (π) of 21 are constants, the web projection volume is set to the volume of the four parts of the winding core [2i] in the winding roll (3), and this value (a) and the winding diameter (seasonal Compared to the diameter of one roll (whether the sword is large or small, the winding roll f
3] No'% Assuming that the density to be taken is smaller or larger than the set value, increase or decrease the tension and contact force by at least 10,000 - the calculated value (Ino and the winding diameter (toughness) A web winding control method characterized by controlling v and ni so as to match.] A tension adjustment mechanism (8 )and,
A contact force adjustment mechanism (9) that can increase or decrease the contact force of the touch roller [51] brought into contact with the winding core (2j), and a contact pressure adjustment mechanism (9) that can increase or decrease the contact force of the touch roller [51] that is brought into contact with the winding core (2j), and a contact pressure adjustment mechanism (9) that can detect the rotational speed (V) of the winding core (2j) and convert it into an electrical signal. 1 rotation speed checker (10) and web feeding roller (
The second rotational speed detector (Ig and the abrasive surface rotation of the nib feed-out roller fil) detects the rotational speed i [”o] of 11 and converts it into an electric signal corresponding to its diameter [Do]. The number is detected and an electric signal G corresponding to the web winding length C1 is generated.
The length detector (12) to be converted and the web to be taken in one roll (
A thickness setting device (+ 3j) that sets the average thickness J (tJ of The winding core diameter setting device (I4) and the winding core f in the winding roll (3)
Winding density (ρ) representing the web loss volume ratio to the surrounding volume of 2 + circumference
15] and - those detectors 110i. to+, (121 and setting device (13), (14+
, (15) as information, performs a predetermined calculation, and then issues a control output. A microcomputer (16) that receives the control output of the microcomputer (1G) is connected to the tension adjustment mechanism (8). ) and the tension control program system (17) that controls the contact force JM node mechanism (9j
It consists of a contact pressure control program system (l(8)) that controls the contact pressure control program system (18), and the microcombi signal is appropriately divided into a control output to the tension control program system (171) and a control output to the contact pressure control program system (18). What is claimed is: 1. A web winding control device, characterized in that it has a calculation function that lowers the output.