JP2879397B2 - Automatic coil centering method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil automatic centering method for automatically inserting a coil conveyed by a coil car into a pay-off reel drum so that the true width direction center of the coil coincides with the line center.

[0002]

2. Description of the Related Art A conventional coil automatic centering method will be described with reference to FIG. A fixed base 10 is installed on the entrance side of the strip processing equipment and the like, and a payoff reel 12 is supported on the fixed base 10. The payoff reel 12 includes a drum 14 extending in a direction orthogonal to a line direction of a strip processing facility or the like. The payoff reel 12 is supported on the fixed base 10 so as to be slidable in the central axis direction of the drum 14. On the fixed base 10, the drum 14 of the payoff reel 12
The hydraulic cylinder 16 is fixedly installed on the opposite side to
The tip of a piston 16 a of the hydraulic cylinder 16 is fixed to the payoff reel 12. The hydraulic cylinder 16 slides the payoff reel 12 in the center axis direction of the drum 14 under the control of a coil centering (CPC) device 18.

[0003] On the other hand, a coil 20 wound by a winding device (not shown) is moved by an arrow A in the figure by a coil car 22.
And automatically inserted into the drum 14 of the pay-off reel 12. At this time, it is necessary to match the true width direction center of the coil 20 with the line center LC. For this reason, conventionally, the photoelectric sensor 24 is disposed so as to oppose in the direction orthogonal to the transport direction during the transport of the coil car 22. The photoelectric sensor 24 includes a light emitter 24T and a light receiver 2
4R, and is arranged at a position where the light beam LB propagating from the light projector 24T to the light receiver 24R is shielded from light while the coil car 22 is being conveyed. Further, a pulse generator 26 is attached to the coil car 22.
6 generates a pulse in synchronization with the rotation of the wheel of the coil car 22. Then, the photoelectric sensor 24 and the pulse generator (P
LG) 26 is connected to a host computer (not shown).

[0004] The host computer firstly detects the photoelectric sensor 2
4 of the light beam LB is time that is shielded by the coil 20, and calculates the width CW _M of the coil 20 by counting the number of pulses generated from the pulse generator 26. Next, the host computer calculates the calculated coil width CW _M
, The coil car 22 transfers the coil 20 to the drum 14
When inserting the, to stop at a position calculating widthwise center CC _M of the coil 20 coincides with the line center LC, issues a command to the coil car 22. At this point, the payoff reel 12 is supported in advance on the fixed base 10 at a position where the longitudinal center DC of the drum 14 matches the line center LC.

[0005]

As described above, in the conventional coil automatic centering method, the coil is centered on the assumption that the light shielding distance of the coil 20 of the photoelectric sensor 24 is equal to the width of the coil 20. However, in practice, as will be described later, the line center LC and calculating the width direction center CC _M may not match.

FIG. 5 shows an example of a sectional shape of a coil 20 wound by a tension reel of a winding device in a pre-process line. As is apparent from FIG. 5, the actual coil 20 may have a winding deviation in the inner layer portion and the outer layer portion. This is because tension is not released when the tail end of the coil is wound on the tension reel. Thus, using a photoelectric sensor 24 and the pulse generator 26, the width of the coil 20 would be calculated as CW _M. Therefore, the calculated coil width C
Calculating the width direction center of the coil 20 obtained from W _M CC _M
But it will be shifted to the true width direction center CC _T of the coil 20. As described above, as calculated widthwise center CC _M of the coil 20 coincides with the line center LC, since the coil 20 is inserted into the drum 14, naturally, the true width direction center line center LC and the coil 20 It does not coincide with the CC _T. In this state, when a line run of the strip processing facility or the like is started, the strip of the coil 20 unreeled from the drum 14 does not run along the center LC of the facility (line), causing various problems.

To eliminate this, the pay-off reel 12
The payoff reel 12 itself slides (shifts) in the direction of the center axis of the drum 14 simultaneously with the start of the line run by using the hydraulic cylinder 16 and the coil centering device 18 attached to the center CC _T have been made to be centered to match the line center LC. However, in this method, when the coil 20 is a thin plate made of aluminum or the like, the strip may be broken at the time of centering.

As another method, a method is also known in which a coil centering device is provided in the middle of a line, and centering is performed so that the strip of the coil 20 runs in the center of the facility from the middle of the line. However, in this method, the strip of the coil 20 runs around the center of the equipment after the coil centering device, but before that, there is a problem that the strip of the coil 20 is not centered.

Therefore, a technical problem of the present invention is that even when a coil having a poor winding is transported, the true width direction center of the coil coincides with the line center when the coil is automatically inserted into the pay-off reel drum. It is an object of the present invention to provide a coil automatic centering method.

[0010]

In the automatic coil centering method according to the present invention, when a coil conveyed by a coil car is automatically inserted into a pay-off reel drum, the true width-wise center of the coil coincides with the line center. A coil automatic centering method, in which a pulse generator attached to a coil car generates a distance in which a light beam of a photoelectric sensor arranged opposite to a direction perpendicular to the conveying direction is shielded by a coil during the conveyance of the coil car. Calculating the width of the coil by counting the number of pulses to be performed, and based on the calculated coil width,
Inserting the coil into the drum such that the center of the calculated width direction of the coil coincides with the center of the line; and, using the measurement result of the centering gauge attached to the payoff reel with the coil inserted into the drum, Calculating the distance between the coil and the side end face of the coil on the payoff reel side, and calculating the center of the calculated width direction of the coil and the true width direction of the coil based on the calculated distance and a preset true coil width. Calculating a deviation from the center, moving the payoff reel in the direction of the center axis of the drum according to the calculated deviation, and matching the true width direction center of the coil with the line center.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, an automatic coil centering method according to an embodiment of the present invention will be described. In order to realize the coil automatic centering method of the present embodiment, a centering gauge 28 is attached to the payoff reel 12. The centering gauge 28 has a piston 28 extending in the same direction as the direction in which the drum 14 extends.
a. Here, the centering gauge 28 is attached to a position outside the position where the inner layer of the coil 20 is unwound. Specifically, as shown in FIG. 1, the distance D between the inner surface of the coil 20 and the outer dimension of the piston 28a is 20 to
The centering gauge 28 should be set so as to be in the range of 50 mm.
Attach.

Referring to FIG. 2, centering gauge 2
8 is provided with a coil confirmation detector. A proximity switch (LS) 30, a pressure switch (PS) 32, or the like is used as a coil confirmation detector. Piston 2
A rack 34a and a pinion 34b are attached to 8a, and a linear motion of the piston 28a is converted into a rotational motion of the pinion 34b. The pinion 34b has a pulse generator 3
6 is attached, and the pulse generator 36 generates a pulse in synchronization with the rotation of the pinion 34b. The pulse generator 36 is fixedly attached to the payoff reel 12, and is connected to a host computer (not shown).

Returning to FIG. 1, since the centering gauge 28 has the above-described structure, by counting the number of pulses generated from the pulse generator 36, the centering gauge 28 is connected to the center PC of the payoff reel 12. it is possible to detect the distance L ₁ between the front end of the piston 28a. The distance L ₁ is referred to as a centering gauge detection distance.

Next, an automatic coil centering method according to this embodiment will be described. It described in the prior art, up to the step of inserting the coil 20 to the drum 14 as calculated widthwise center CC _M of the coil 20 coincides with the line center LC, so is similarly performed also in the present embodiment, the following The following steps will be described.

The host computer (not shown) includes a coil 2
0 is inserted into the drum 14, the payoff reel 1
The distance L ₂ between the line center LC and the side end face of the coil 20 on the payoff reel 12 side is calculated using the measurement result of the centering gauge 28 attached to the center ₂ . This will be described in more detail. As shown in FIG.
The distance between the center PC of the payoff reel 12 and the line center LC is W. This distance W is constant and is stored in the host computer in advance. By extending and retracting the piston 28a of the centering gauge 28, the host computer counts the number of pulses from the pulse generator 36 up to the point when the coil-side end surface is detected, and the centering gauge detection distance L
Calculate ₁ . Host computer subtracts a centering gauge detection distance L ₁ from the fixed distance W, and calculates the distance L _2.

Next, the host computer is true widthwise center CC of calculating the width direction center CC _M and the coil 20 of the coil 20 on the basis of the true coil width L ₃ in advance is set as the distance L ₂ which is the calculated _The payoff reel 12 is moved in the direction of the center axis of the drum 14 using the hydraulic cylinder 16 in accordance with the calculated difference ε, and the true center CC of the coil 20 in the width direction is calculated. _T is line center L
Match with C. To be a little more in detail, the host computer is stored in advance the true coil width L _3. The host computer calculates the deviation ε from the equation ε = L ₃ / 2−L ₂ . The host computer gives the obtained deviation ε to the hydraulic cylinder 16 and moves the payoff reel 12 in the direction of the center axis of the drum 14 by a distance corresponding to the deviation ε. Thus, it is possible to match the true width direction center CC _T of the coil 20 to the line center LC.

FIG. 3 shows an example of the configuration of the hydraulic cylinder 16. A digital gauge 38 is attached to the piston 16 a of the hydraulic cylinder 16. The digital gauge 38 is fixed to the cylinder body. When the movement amount of the piston 16a detected by the digital gauge 38 matches the deviation ε, the host computer stops driving the hydraulic cylinder 16.

The hydraulic cylinder 16 may be provided with a rack, a pinion, and a pulse generator in place of the digital gauge 38, similarly to the centering gauge 28 shown in FIG.

Conversely, as the centering gauge 28, similarly to the hydraulic cylinder 16 shown in FIG.
A digital gauge may be provided instead of the pinion 34b and the pulse generator 36.

[0021]

As is apparent from the above description, the coil automatic centering method of the present invention uses the photoelectric sensor and the pulse generator attached to the coil sensor to calculate and determine the coil based on the coil width. In addition to performing centering, the centering gauge attached to the payoff reel is used to compensate for misalignment, so even if a coil with poor winding is transported,
There is an effect that the true width direction center of the coil can be matched with the line center.

[Brief description of the drawings]

FIG. 1 is a schematic front view for explaining a coil automatic centering method according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of a centering gauge shown in FIG.

FIG. 3 is a schematic view showing an example of the hydraulic cylinder shown in FIG.

4A and 4B are views for explaining a conventional coil automatic centering method, wherein FIG. 4A is a schematic plan view and FIG. 4B is a schematic front view.

FIG. 5 is a schematic sectional view showing an example of a sectional shape of a coil wound by a tension reel of the winding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fixed base 12 Payoff reel 14 Drum 16 Hydraulic cylinder 28 Centering gauge 36 Pulse generator 38 Digital gauge

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65H 19/12 B21C 47/24

Claims (1)

(57) [Claims] 1. A coil automatic centering method for automatically inserting a coil conveyed by a coil car into a drum of a pay-off reel so that a true center in a width direction of the coil coincides with a line center. The distance in which the light beam of the photoelectric sensor arranged opposite to the transport direction is shielded by the coil is counted by counting the number of pulses generated from a pulse generator attached to the coil car. Calculating the width of the coil based on the calculated coil width, inserting the coil into the drum such that the center of the calculated width direction of the coil coincides with the center of the line, and Measurement result of the centering gauge attached to the payoff reel in the inserted state Calculating the distance between the line center and the side end face of the coil on the payoff reel side, and calculating the coil based on the calculated distance and a preset true coil width. Calculating a deviation between the width direction center and the true width direction center of the coil, moving the payoff reel in the center axis direction of the drum in accordance with the calculated deviation, and setting the true width direction center of the coil to Matching the center of the line.