JPH0824959B2 - Warp adjustment device for metal strips - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention relates to a warp adjusting device for a metal strip for unwinding a metal strip unwound from a coil.

(2) Prior Art Conventionally, as the above-mentioned warp adjusting device, for example, the actual opening 63-
As disclosed in Japanese Patent No. 53314 and Japanese Patent Publication No. 52-11659, a plurality of lower rollers arranged below and above the moving path of the metal strip unwound from the coil and arranged in parallel along the moving path. And a plurality of upper rollers, which are respectively arranged so that the upper and lower rollers are displaced from each other, and a drive mechanism for adjusting the amount of reduction of the upper roller toward the strip plate side is connected to the upper roller. Already known.

By the way, since the warp of the metal strip corresponds to the radius of curvature centered on the axis of the rewind reel when the strip is coiled, conventionally, the radius of the coil is adjusted to correct the warp. The amount of reduction of the upper roller by the drive mechanism is controlled according to the detected radius.

(3) Problems to be Solved by the Invention However, in the one disclosed in Japanese Utility Model Laid-Open No. 63-53314, the upper roller is composed of an eccentric cam roller which is interlocked with the motor. The relative position of the roller with respect to the lower roller may be displaced not only in the vertical direction but also in the moving direction of the strip plate, which may cause an error in warp correction due to the cooperation of the eccentric cam roller and the lower roller. The one disclosed in Japanese Patent Publication No. 52-11659 discloses that the output of the motor is transmitted to the support portion of the plurality of upper rollers via the chain transmission mechanism.
Due to the elongation of the chain or the like, the amount of reduction of the upper roller with respect to the strip plate may be deviated, which may cause an error in warp correction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a warp adjusting device for a metal strip, which solves the above problems of the conventional device and is capable of accurately and accurately performing warp correction.

B. Configuration of the Invention (1) Means for Solving the Problems According to the present invention for achieving the above object, the metal strips unwound from the coil are provided on the lower side and the upper side of the moving path and on the moving path. A plurality of lower rollers and a plurality of upper rollers, which are arranged in parallel along each other, are respectively arranged so that the rollers are displaced from each other on the lower side and the upper side, and the upper roller is adjusted to adjust the warp of the metal strip. In a warp adjusting device for a metal strip, which is formed by connecting a drive mechanism for pressing down to the plate side to an upper roller, a detector for detecting the radius of a coil, and a calculation for calculating a target value based on the detected value of the detector. And a drive mechanism, wherein the drive mechanism is arranged parallel to each roller and rotatably supported on a fixed base, and a motor supported by the base to rotationally drive the rotary shaft. And a rotary connected to the end of the rotary shaft The encoder, the pair of lifts that rotatably support both ends of the upper roller, and the rotary shafts that are respectively screwed to the lifts and erected on the base rotatably around a vertical axis. And a pair of screw rods that rotate in conjunction with each other via a gear, the computing unit,
In order to control the amount of reduction of the upper roller according to the radius of the coil, the motor is operated based on the target value and the rotation amount detected by the rotary encoder.

(2) Operation According to the above configuration, the rotation amount of the motor is always transmitted linearly to the rotary encoder and the pair of screw rods (and by extension, both ends of the upper roller) via the rotary shaft with high accuracy, and the upper roller is , The target of the upper roller is simply because it moves up and down along the screw rod in conjunction with the rotation of the motor, and there is no risk of the relative position with the lower roller being unintentionally displaced in the moving direction of the metal strip. The reduction amount and the target operation amount of the motor can be accurately associated with each other, and the reduction amount control of the upper roller according to the coil radius can always be performed accurately.

Further, although a pair of screw rods are installed to individually drive both ends of the upper roller, both screw rods surely rotate in synchronization by a common rotating shaft, and the upper roller is properly tilted. Maintained in a horizontal position.

(3) Embodiment One embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, a coil 2 formed by winding a metal plate material 3 is wound around a rewind reel 1, and the coil 2 is formed in accordance with the operation of a decoiler 4 including a pair of upper and lower pinch rollers. The metal strip 3 is unwound from the coil 2 by rotating. Thus, the metal strip 3 sent out from the decoiler 4 is bent downward in the louving pit 8 between the pair of rollers 5 and 6 arranged at intervals along the feeding direction 7, and further the leveler. After adjusting the warp by 9, the feeder 10 intermittently feeds the blanking press 11 by a predetermined length. In the blanking press machine 11, the metal strip 3 is blanked into a predetermined shape, and the obtained metal strip 3 ′ is unloaded from the blanking press 11 via the unloading conveyor 12.

Referring also to FIG. 2, the rewinding reel 1 is rotatably supported by the upper ends of a pair of columns 14, 14 standing on a substrate 13 arranged at a fixed position on the floor. It is a thing.
Further, on the substrate 13, a pair of columns 15, 15 are erected on both sides of the metal strip 3 which is unwound from the coil 2.
A rotating shaft 16 having an axis parallel to the rewind reel 1 is rotatably supported between the upper ends of the parts 15. Moreover, the coil 2 wound around the rewind reel 1 is provided at the intermediate portion of the rotating shaft 16.
The base end 1 of the arm 17 that slides the roller 17a at the tip on the outer surface of
7b is fixed. In addition, the rotary shaft 16 and both columns 14,14
In between, springs 33, 33 for urging the rotating shaft 16 in a direction in which the roller 17a of the arm 17 is brought into sliding contact with the outer surface of the coil 2 are provided.

Thus, the rotating shaft 16 is fixed to the rotating shaft 16 at a position higher than the highest position on the outer peripheral surface of the coil 2, and accordingly, when the metal strip plate 3 is unwound, the radius of the coil 2 becomes smaller. The arm 17 rotates so that the roller 17a is at the lower position, and the rotating shaft 16 also rotates accordingly.

One end of the rotating shaft 16 is connected to a rotary encoder as a detector 18 supported by one of the columns 15 and 15, and the detector 18 detects the amount of rotation of the rotating shaft 16. As described above, the rotating shaft 16 rotates in response to the rotation of the arm 17, that is, the radius change of the coil 2, and the detector 18 includes the rotating amount of the rotating shaft 16, that is, the coil 2.
Will detect the radius of.

Referring also to FIG. 3, the leveler 9 includes a metal strip 3
Is arranged in the middle of the moving path from the decoiler 4 to the blanking press machine 11, and is arranged at a fixed position and is in parallel with each other along the moving path.
19 and a plurality of upper rollers 20 that are staggered so as to deviate from the lower rollers 19 and that are also parallel to each other along the movement path, and that can move up and down each upper roller 20. The driving mechanism 21 is provided to correct the warp of the metal strip 3 in accordance with the distance between the upper roller 20 and the lower roller 19, that is, the amount of reduction of the upper roller 20.

Both ends of each upper roller 20 are rotatably supported by a pair of lifting bodies 22 and 22, respectively. Then, as the lifting bodies 22, 22 are driven up and down by the drive mechanism 21, the upper rollers
20 will move up and down.

The drive mechanism 21 is a pair of screw rods 2 each having a rod shape extending along a vertical line and having upper portions screwed into both the lifting bodies 22 and 22, respectively.
3, 23 and a rotary shaft 26 rotatable about a horizontal axis while having worm gears 25, 25 meshing with the worms 24, 24 provided at the lower ends of the screw rods 23, 23, respectively, and the rotary shaft 26.
And a motor 28 connected to one end of the roller 28 via a gear train 27, and the rotating shaft 26 is parallel to the rollers 19 and 20. The lower ends of the screw rods 23, 23 and the both ends of the rotary shaft 26 are rotatably supported by gear boxes 30, 30 fixedly arranged on a fixed base 29, respectively, and each worm 24 And each worm gear 25 is housed in their gear box 30,30. The motor 28 is, for example, an inverter motor whose rotation speed is variable from low speed to high speed, and the motor 28 is normally rotated at a low speed.

The amount of reduction of the upper roller 20 in the leveler 9, that is, the amount of operation of the motor 28 in the drive mechanism 21 is controlled by the calculator 31, which includes the arm 17 detected by the detector 18. The amount of rotation, that is, the radius of the coil 2 is input. Thus, in the calculator 31, the amount of rotation of the arm 17, that is, the amount of reduction as the target value of the leveler 9 corresponding to the radius of the coil 2 is set to the fourth value depending on the type of the metal strip 3, that is, the difference in material and plate thickness. It is preset as shown by the curves A and B in the figure, the calculator 31 calculates the reduction amount as the target value based on the detected value of the coil radius input to this,
The motor 28 is operated by the amount corresponding to the reduction amount. Thus, the base 29 of the leveler 9 is provided with the rotary encoder 32 connected to the other end of the rotary shaft 26, and the rotation amount detected by the rotary encoder 32 is input to the calculator 31. It Therefore, the computing unit 31 operates the motor 28 until the amount of rotation detected by the rotary encoder 32 reaches the set value.

Next, the operation of this embodiment will be described. When adjusting the warp of the metal strip plate 3 by the leveler 9, the type of the metal strip plate 3, that is, the material and the plate thickness thereof is given to the calculator 31, and the metal strip plate 3 is adjusted. The calculator 31 selects a reduction amount setting program corresponding to the type.

Thus, the metal strip 3 is unwound from the coil 2 by the operation of the decoiler 4, and the metal strip 3 intermittently operates the feeder 10 to intermittently pass through the leveler 9 at a constant length for a blanking press. It is sent to machine 11. However, when the metal strip 3 is sent to the blanking press machine 11 while having a warp, the metal plate material 3 ′ obtained by the blanking press machine 11 also has a warp. Therefore, the metal strip 3 whose warpage has been adjusted by the leveler 9 is sent to the blanking press machine 11.
The warp corresponds to the radius of curvature centered on the axis of the rewind reel 1 when the metal strip 3 has a coil shape.

Therefore, the warp of the metal strip 3 can be estimated by constantly detecting the radius of the coil 2 by the detector 18, and the calculator based on the radius of the coil 2 obtained by the detector 18.
The amount of reduction as a target value is set by 31 and the drive mechanism 21 of the leveler 9 is operated based on the target amount of reduction and the amount of rotation detected by the rotary encoder 32, whereby the warp of the metal strip 3 is automatically performed. Therefore, it is not necessary to arrange a special worker to adjust the warp of the metal strip 3.

Moreover, the detection of the radius of the coil 2 does not depend on the feeding condition of the metal strip 3 but is the condition that the feeding of the metal strip 3 is intermittent and that a constant tension is not always applied. Even if the radius of the coil 2 is constantly detected, the warp of the metal strip 3 can be automatically adjusted.

C. Effects of the Invention As described above, according to the present invention, the drive mechanism for the upper roller supports the rotary shaft rotatably supported on the fixed base and the base for rotationally driving the rotary shaft. Motor,
A rotary encoder connected to the end of the rotary shaft, a pair of lifts that rotatably support both ends of the upper roller, and screwed to both lifts and rotated around the vertical axis on the base. A pair of screw rods that are freely erected and rotate in conjunction with each other via a gear on a rotating shaft are provided, and a calculator calculates a target value calculated based on a detected value of a coil radius and a rotation amount detected by a rotary encoder. Based on the above, the motor is operated to control the amount of rolling down of the upper roller according to the coil radius.Therefore, the amount of rotation of the motor is controlled by the rotary encoder and a pair of screw rods (and by extension the upper roller) via the rotary shaft. It is possible to always transmit linearly to both ends) with high accuracy, and the upper roller simply moves up and down along the threaded rod in conjunction with the rotation of the motor, and the relative position with the lower roller is gold. As a result of the above, it is possible to always accurately associate the target amount of reduction of the upper roller with the target operation amount of the motor without the risk of inadvertent displacement in the direction of movement of the strip. It can contribute to the improvement of the accuracy of quantity control.

In addition, even though a pair of screw rods are installed to individually drive both ends of the upper roller, both screw rods can be surely rotated in synchronization by a common rotation shaft. Instead, it can be maintained in an appropriate horizontal posture, and the metal strip can always be appropriately pressed.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a simplified overall side view, FIG. 2 is a perspective view of a coil showing a state of being mounted on a rewind reel, and FIG. 3 is a simplified leveler. FIG. 4 is a diagrammatic view showing the relationship between the coil radius and the amount of reduction. 2 ... Coil, 3 ... Metal strip, 9 ... Leveler, 18 ... Detector, 19 ... Lower roller, 20 ... Upper roller, 21 ... Driving mechanism,
22 ... Lifting body, 23 ... Screw rod, 24; 25 ... Worm as gear; Worm gear, 26 ... Rotating shaft, 28 ... Motor, 29 ... Base, 31 ... Computing unit, 32 ... Rotary encoder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Hirai 285-4 Higashi Mitsugi, Sayama City, Saitama Prefecture (72) Inventor Masahiro Kurata 2-6-29 Shin Sayama City, Sayama City, Saitama Prefecture No. 203 Hirose Mansion (72) Inventor Masahiro Yamamoto 2-9-23-204 Takeoka, Kiyose-shi, Tokyo (56) References Showa 63-53314 (JP, U) JP-B 44-10203 (JP, B1) JP-B 52-11659 (JP, B2)

Claims (1)

[Claims] 1. A plurality of lower rollers (19) and a plurality of lower rollers (19) which are respectively arranged in parallel along a moving path of a metal strip (3) unwound from a coil (2) below and above the moving path. The upper rollers (20) are arranged so that the rollers (19, 20) are displaced from each other on the lower side and the upper side, and the upper rollers (20) are arranged to adjust the warp of the metal strip (3). The drive mechanism (21) for pressing down the plate (3) side is connected to the upper roller (2
In a warp adjusting device for a metal strip connected to (0), a detector (18) for detecting the radius of the coil (2) and a target value are calculated based on the detection value of the detector (18). A rotating shaft (26) provided with a computing unit (31), the drive mechanism (21) being rotatably supported on a fixed base (29) arranged in parallel with the rollers (19, 20). A motor (28) supported by the base (29) to drive the rotary shaft (26) to rotate, and a rotary encoder (32) connected to an end of the rotary shaft (26).
And a pair of lifting bodies (22) that rotatably support both ends of the upper roller (20), and screwed to both the lifting bodies (22), and around the vertical axis on the base (29). And a pair of screw rods (23) rotatably erected on the rotary shaft (26) via the gears (24, 25) to rotate the rotary shaft (26), and the computing unit (31) includes the coil (2). ), The motor (28) is actuated based on the target value and the rotation amount detected by the rotary encoder (32) in order to control the amount of reduction of the upper roller (20) according to the radius. A warp adjusting device for a metal strip, which is characterized in that