JPH038669A - Control device of winder - Google Patents

Abstract

PURPOSE:To control tension fluctuation and eliminate the difference in level of a strip at the time of winding by controlling the stepped part position of the mandrel of a winder in such a manner that the mandrel stepped part coincides with the strip top end position. CONSTITUTION:When the top end of a strip 1 is moved from a strip top detector 7 to the winding stopped position of a stepped mandrel 3, the mandrel 3 circumferential speed is accelerated at the time when the strip 1 top end is reached to the stepped part, and controlled so that the strip 1 top end coincides with the stepped part at a timing of its reaching to the mandrel 3. Hence, by fitting the mandrel 3 stopped part to the position of the strip 1 top end, the coil diameter form after winding is made circular to restrain tension fluctuation. Consequently, in a rolling machine, material characteristic imbalance caused by the tension fluctuation is reduced to improve yield, and the winding form is also improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a control device for a winding machine installed in, for example, cold rolling equipment, pickling equipment, galvanizing equipment, etc.

(Prior Art) In the conventional art, the mandrel does not have a stepped portion, and the strip is transported by a strip transport device and wound around the mandrel by a belt wrapper.

(Problem to be Solved by the Invention) In the prior art, a mandrel with a stepped portion was not used, so when the strip was wound around the mandrel, a step in the thickness of the strip occurred, which appeared as a fluctuation in tension. .

The object of the present invention is to use a mandrel with a single step,
It is an object of the present invention to provide a control device for a winding machine that allows the tip of a strip to reach a stepped portion of a mandrel with high accuracy and suppresses tension fluctuations.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a step position based on the rotation angle of the stepped mandrel of the winder when the leading end of the strip passes through a strip end detector provided on the exit side of the strip conveying device. is detected, and when the strip tip reaches the mandrel position, the mandrel stepped part and the strip tip position match 1.
It is characterized by controlling the stepped portion position of the mandrel of the winder.

(Function) By controlling the timing of increasing the mandrel circumferential speed until the strip tip reaches the stepped part of the mandrel and aligning the position of the stepped part of the mandrel and the tip of the strip.

The diameter of the coil after winding becomes a perfect circle, suppressing tension fluctuations.

(Example) Next, one embodiment of the present invention will be described.

FIG. 1 shows a winding machine that winds the tip of a strip onto a stepped mandrel 3 via a belt wrapper, and a speed detector 5 attached to a strip conveying device 4 to detect the speed of the strip.
A strip tip detector 7 provided on the output side of the strip conveying device 4, a pulse transmitter 6 attached to a stepped mandrel shaft of a winder (not shown) to detect its rotation angle, and a strip tip detector 7 provided at the strip tip. a calculation function 11 that calculates a correction signal for correcting a position error from the rotation angle θ of the stepped mandrel 3 detected via the pulse transmitter 6 when passing through the step position of the stepped mandrel 3 of the winding machine; This figure shows a control device for a winding machine having a correction function 12 for correcting the circumferential speed of the stepped mandrel 3 so as to align the circumferential speed of the stepped mandrel 3 with the tip of the strip.

That is, in FIG. 1, when the strip tip moves a distance L (m) from the strip tip detector 7 to the stepped position of the stepped mandrel 3 at the time of winding, and the strip speed is V, the stepped portion of the mandrel The time t until arrival is expressed as t=-...(1).

The initial peripheral speed of the mandrel is V, (<V), and at the time t when the strip tip reaches the stepped part, the mandrel peripheral speed is accelerated from vll to V, and at the timing when the strip tip reaches the mandrel, the stepped part The mandrel circumferential speed is controlled so that it matches. In FIG. 2, the change in the mandrel circumferential speed after the time when the strip tip was detected by the strip tip detector 7 was set to 1=0 is shown by a solid line. Here, if the mandrel acceleration rate is α, then t + 1. +1. =1
...(2) V-v.

t, =
...(3) α If the angle of the stepped part of the mandrel at the time when the strip tip is detected by the strip tip detector 7 in 22 is θ, then the sum of the nozzles, L, and L in Figure 2 is: It is expressed as

Here, n is an integer value, and is the amount of rotation of the mandrel axis required for the tip of the strip to reach the mandrel, or =v, Xt.

L3=vXt.

Therefore, when tl is found from equations (4), (5), and (6), it is found as o-V. The value of the mandrel rotation amount n at tl determined by equation (7) is tx + ti + ti≦
t, the strip tip, is required to complete control during the mandrel arrival.

〔Effect of the invention〕

According to this control device, there is no step difference in the strip when winding it onto the mandrel, so tension fluctuations can be suppressed.
In a rolling mill, imbalances in material properties caused by tension fluctuations are reduced, resulting in improved yield and improved winding shape.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the control device of the present invention, and FIG.
FIG. 3 is an explanatory diagram of mandrel circumferential speed and line speed. 1...Strip, 2...Belt wrapper 3...
Stepped mandrel, 4... Strip conveyance device, 5...
・Speed detector, 6...Pulse transmitter, 7...Strip tip detector.

Claims (1)

[Claims] A control device for a winding machine that winds the leading edge of a strip onto a stepped mandrel via a belt wrapper includes a speed detector attached to a strip conveying device to detect its speed, and a strip leading edge detection device installed on the exit side of the strip conveying device. a pulse transmitter that is attached to the stepped mandrel shaft of the winder and detects its rotation angle; and a pulse transmitter that detects the rotation angle of the stepped mandrel when the strip tip passes the strip tip detector; a calculation function for calculating a correction signal for correcting a position error from the rotation angle of the stepped mandrel; and a correction function for correcting the circumferential speed of the stepped mandrel so that the stepped position of the stepped mandrel is aligned with the tip of the strip. A control device for a winding machine comprising: