JPS61226469A - Tension control method for wire take-up machine - Google Patents

Abstract

PURPOSE:To enable a wire to be taken up in a good shape by controlling a take-up machine in such a way that tension of the wire is set to be greater than a reference tension at the time of starting, but is decreased gradually as the diameter of a winding becomes larger, and is set to be smaller than the reference one when the winding comes to an end. CONSTITUTION:When a wire 10 is taken up by a take-up bobbin 16 of a take-up machine 14 which is rotated by a motor 20 by way of a dancing roller 21, speed TG of the wire 10 is detected by a wire speed detector 22, tension T is detected by a dancing roller position detector 24, and revolving speed R of the bobbin is detected by a revolving speed detector 26. Then, a reference tension To is computed by a tension control means based on a ratio between wire speed TG and revolving speed R, and tension greater than To is applied at the time of starting and is gradually decreased as the diameter of a winding becomes larger. When the winding comes close to an end, a movable roller 12A of the dancing roller 12 is displaced based on the output from a taper setting unit 40 so that tension may be tapered so as to be smaller than the reference tension To.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a method for winding various wire rods supplied through a wire rod processing process such as a wire drawing process or a coating process into a wire rod winding machine while controlling the tension. This invention relates to an improvement in a tension control method for a wire winder.

(Prior art) A dancer roll is generally used to control the tension when winding a wire rod, but this dancer roll is designed to adjust the wire speed and wire winding machine on the premise that the diameter of the winding bobbin does not change. It is controlled to maintain a reference tension value set by the ratio to the rotation speed. However, if the wire rod is always wound with a constant tension from the beginning to the end, depending on the winding diameter of the take-up drum, the wire rod may drop and bite, resulting in poor winding appearance and the need to unwind the wire in the next process. Sometimes it is not possible to unwind the wire,
If the wire is forcibly fed out, the wire may be damaged or broken, which has the disadvantage of degrading quality and reducing productivity. Further, if the wire rod was wound in a bad shape, the first winding control system would be out of order, making it impossible to wind the wire stably.

(Object of the Invention) An object of the present invention is to provide a tension control method for a wire winding machine that can wind the wire well without deteriorating the winding appearance of the wire.

(Structure of the Invention) In the tension control method of the wire winding machine of the present invention, when the wire is wound onto the winding machine via a dancer roll, the dancer roll is set based on the ratio of the wire speed to the rotational speed of the wire winding machine. This dancer roll gives the wire a tension value that is larger than the standard tension value at the beginning of winding, and as the winding diameter of the wire increases, it gives the wire a tension value that becomes smaller than the standard tension value. It is characterized by correcting the reference tension value and supplying it. It is preferable that the tension value larger than this reference tension value is within 130% of the reference tension value, and the tension value smaller than the reference tension value is preferably 70% or more of the reference tension value.

By doing this, the wire rod wound on the S-take bobbin will not have any depressions or bites and will have a good winding appearance. can be wound stably.

(Example) An example of the present invention will be described in detail with reference to the drawings. Fig. 1 systematically shows the tension control method of the wire winding machine according to the present invention, Alternatively, from the coating process, the wire is wound onto the winding bobbin 16 of the wire winding machine 14 while the winding speed is controlled by the dancer roll 12. Wire winding machine 1
4 is rotated by a winder motor 20 whose drive is controlled by a drive unit 18. The linear velocity TG of the wire 10 is detected by a linear velocity detector 22, the tension T of the wire 10 is detected by detecting the dancer roll position with a position detector 24 provided on the dancer roll 12, and the winding bobbin 16 The rotational speed R is detected by a rotational speed detector 26 connected to the winder motor. The drive unit 18 is connected to a speed control unit 28 that sets the rotation speed RO of the wire winding machine based on the linear speed and tension detection values, and compares the rotation speed setting value Ro with the rotation speed detection value R. Wire winding machine 1
4, the winder motor 16 is driven to rotate the wire winder 14 at a predetermined rotational speed.

The dancer roll 12 is connected to a hoist-type displacement machine 30 that displaces the movable roll 12A, and this displacement @30 is connected to a drive source 34 via a powder clutch 32.

The control means 36 that controls the tension F applied to the dancer roll 12 determines the reference tension value T by determining the ratio between the linear velocity TG and the detected rotational speed Ro of the wire winding machine.

This reference tension value T is set at the divider 38 and at the beginning of winding.
The taper coefficient Sl from the taper setting device 40 is used as a reference, and the taper coefficient Sl is set to be larger than O and gradually decreases as the winding diameter of the wire 10 increases, and at the end of winding, a tension value smaller than the reference tension value is given to taper the tension. A multiplier 42 that multiplies the tension value To to obtain a correction value T1, and a multiplier 46 that multiplies the correction value T1 by a line coefficient S2 from a tension setting device 44 that sets tension according to the wire diameter, wire type, etc. to obtain a correction value T2. It consists of. This correction value T2 is the drive source 3 of the dancer roll 12.
4. If the reference tension value To is 100%,
As for the correction value T2, the upper limit of the taper is 13 as shown in Figure 2.
The correction value T3, which is preferably within 0% and the lower limit is 70% or more, is set within this range depending on the wire diameter or wire type.

Taper setter 40 is also connected to multiplier 46, and contacts 48a, 48b of timer 48 are provided between multipliers 42 and 46 and between taper setter 40 and multiplier 46.

This is because the timer 48 operates for about 2 seconds when TG and RO are stabilized at the start of the line, opens the contact 48a and closes the contact 48b to mask TI, and the multiplier 46 calculates the difference between the taper coefficient S1 and the line coefficient S2. The powder clutch 32 is driven by the product, and then steady operation begins. As already mentioned, in this steady operation, T3 is 52xT2=S2xSlxT1=S2
xS 1xTG/Roc7) Control the tension of the wire with the tension value. Therefore, as shown in Fig. 2, the wire rod is wound so that it is larger than the reference tension value To at the beginning of winding, gradually decreases as the diameter of one turn becomes larger, and becomes smaller than the reference tension value at the end of 9 turns. .

(Effects of the Invention) According to the present invention, as described above, the tension of the wire is greater than the standard tension value at the beginning of the 9th winding, gradually decreases as the diameter of the 9th winding increases, and becomes smaller than the standard tension value at the end of the 2nd winding. Since the wire rod is wound in such a manner that there is no depression or digging in the wire rod wound on the winding bobbin, the winding appearance is good, and the wire rod can be easily and reliably fed out in the next process. Damage and wire breakage are eliminated, which improves quality, yields improve, and productivity improves.Furthermore, since the winding appearance is good, winding control can be performed stably, which is a practical benefit.

[Brief explanation of the drawing]

FIG. 1 is a schematic system diagram of a tension control method for a wire winding machine according to the present invention, and FIG. 2 is a characteristic diagram of the tension controlled by the present invention. 10---One wire rod, 12---Dancer roll, 1
4---Single wire winding machine, 16---Winding bobbin,
22 - Linear velocity detector. 26-----Rotation speed detector, 34-----One drive source,
36-----control means, 38-----divider, 40
--- Taper setting device, 42.46 ----- Multiplier, 44 ----- Tension setting device, TG --- Linear speed, R
o----Rotational speed of the wire winding machine, Tl----1 reference tension value, T2, T3----1 correction value. Nt Figure 2a; - Shizuka Yingkei

Claims (3)

[Claims] (1) When the wire is wound onto the wire winding machine via the dancer roll, the dancer roll is controlled to maintain a reference tension value set by the ratio of the wire speed to the rotation speed of the wire winding machine. In the tension control method for a wire winding machine, the dancer roll applies a tension value larger than the reference tension value to the wire rod at the beginning of winding, and as the winding diameter of the wire becomes larger, the tension value is applied to the wire rod larger than the reference tension value. A tension control method for a wire winding machine, characterized in that the reference tension value is corrected and supplied so as to provide a tension value that is smaller than the reference tension value. (2) The tension control method for a wire winding machine according to claim 1, wherein the tension value larger than the reference tension value is within 130% of the reference tension value. (3) The tension control method for a wire winding machine according to claim 1, wherein the tension value smaller than the reference tension value is 70% or more of the reference tension value.