JPH0255607A - Method for controlling edging in edging press - Google Patents

Abstract

PURPOSE:To accurately edge by finding a predictive deformation amount for a set width based on a spring constant of a stock, a spring constant of a press device, and a predictive load put on the stock, narrowing a gap between dies by the predictive deformation amount from a set width, and largely setting a pushing amount. CONSTITUTION:A temp. T of a stock 8 is detected by a temp. detector 18 and a spring constant Km corresponding to the temp. T is selected from a setter 19 and is inputted to a computing element 20; a spring constant Kp of a press device previously set in the setter 19 and a predictive load Py are also inputted to the element 20 to calculate a predictive deformation amount Wy by a prescribed equation. A value of Wy/2 is inputted to a comparator 21. Concurrently, a pushing amount x of a slide 5 detected by a position detector 16 is inputted to find a value of Wy/2- x and a controller 22 outputs a command to a motor 10 so that the said difference value is made to be zero. The motor 10 is driven to move a nut 7 in the axial direction, the slide 5 reciprocates in the width direction of the stock 8 to adjust a gap between dies 15, 15. Hence, edging with dimensional accuracy is performed and the yield is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a width reduction control method for a width reduction press apparatus.

[Prior Art] Conventionally, in a rolling line for materials such as slabs, the material is heated to a predetermined temperature in a heating furnace, then sent to the rolling line, rolled to a predetermined width by a vertical mill, and then rolled to a horizontal mill. It was horizontally rolled to a specified thickness.

However, with the vertical mill, there is a limit to the amount that can be reduced in width at one time, so in recent years, in order to easily and reliably perform large width reductions, a pair of molds has been placed facing each other on both sides of the material, sandwiching the material. It has been proposed and actually operated to use a width reduction press device that moves the molds toward and away from each other.

[Problems to be Solved by the Invention] However, in the width reduction press device as described above, the distance between the positions where the pair of molds are closest to each other is set to be the same as the width dimension of the material to be width reduced. However, in this case, the width dimension of the material that is actually width-reduced becomes larger than the set value due to the influence of the width-reduction press device and the elastic white compression of the material itself, and the width dimension accuracy of the material is This was extremely poor and led to a decrease in the yield of products that were horizontally rolled after width reduction.

In view of these circumstances, the present invention aims to provide a width reduction control method for a width reduction press device that can obtain a material with high width dimension accuracy and improve the yield of finished products.

[Means for Solving the Problems] The present invention detects the temperature of the material at the start of operation, and determines the spring constant of the material according to the temperature, the type of material, the plate thickness, the rolling length of the mold, and the pressing device. From the spring constant of In addition, after the start of operation, it detects the width dimension of the material that has actually been rolled down, and compares the width dimension with the set width to determine the width of the material that has been rolled down. The present invention is characterized in that an actual amount of distortion with respect to a set width is determined, and the amount of depression of the mold is adjusted in accordance with the actual amount of distortion.

[Function] Therefore, at the start of operation, the temperature of the material is detected, and the spring constant of the material, the spring constant of the press device, and the material according to the temperature, type of material, plate thickness, and rolling length of the die are determined. From the predicted load applied to the material, the predicted strain amount for the set width of the material to be width-reduced is determined, and the die is pushed in so that the gap between the molds is narrowed by the predicted strain amount, and the width reduction of the material is performed. .

On the other hand, after the start of operation, the width dimension of the material that has actually been rolled down in width is detected, and the width dimension and the set width are compared to determine the actual amount of strain for the set width of the material that has been rolled down in width. The amount of indentation of the mold is adjusted accordingly, and the width of the material is reduced.

[Implementation example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which an eccentric portion 2a of a crankshaft 2, which is rotatably supported on both sides of a housing 1 and rotationally driven by a drive device (not shown), has a spherical pressure receiver 3 at its tip. A connecting rod 4 having a shape formed thereon is pivotally mounted, and a spherical pressure receiver 3 of the connecting rod 4 is rotatably fitted into a spherical seat 6 slidably fitted into a hollow portion of a slide 5. A male threaded part of a screw shaft 9 extending in the width direction of a material 8 such as a slab is screwed into a female threaded part of a nut 7 fitted into the hollow part of the slide 5, and a motor is connected to a spline part of the screw shaft 9. A worm wheel 12 is fitted into the hollow part of the slide 5 so that it can be rotationally driven by the worm 11 by lO, and the tip of the rod 14 of the balance cylinder 13 fixed to the housing 1 is attached to the slide 5. The slide 5 is always urged in the width direction and toward the material 8 side with a desired force so that the screw shaft 9 is always in contact with the spherical seat 6, and the material 8 is applied to the slide 5. A mold 15 for width reduction is removably attached, and the screw shaft 9 screwed into the nut 7 is rotated by the rotation of the worm wheel I2 via the worm 11 by the motor IO, and the slide 5 is moved into the material 8. The mold 1 is moved forward and backward in the width direction.
5. The configuration is such that the gap between 15 and 15 can be adjusted.

Further, a position detector 16 for detecting the push-in QAx of the slide 5, a width detector 17 for detecting the width W1 of the material 8 after width reduction in the mold 15.15, and a temperature T of the material 8 are provided. When predictive control is performed at the start of operation by disposing temperature detectors 18 for detecting the
1y1 is selected from the setting device 19 as the spring constant of the material 8 according to the rolling length of
Then, the predicted load py applied to the material 8 is manually inputted to the calculator 20, and the calculator 20 calculates the predicted strain amount AWy, that is, how much larger the width-reduced material will be than the set width Wo.
, the value was calculated using 1. ! The value of IWy/2 and the pushing mAx of the slide 5 detected by the position detector 16 are input to the comparator 21, and a command signal can be output from the lowering control device 22 to the motor IO so that the deviation becomes 0. do it like this.

On the other hand, after the start of operation, the width dimension W of the material 8 that was actually reduced in width
1 can be detected by the width detector 17, the aforementioned predictive control is switched to feedback control, and the setting width W0, which is preset by the setting device 23, is input to the arithmetic unit 20. At the same time, the width dimension W1 detected by the width detector 17 is manually input, and the actual distortion amount AW is calculated by the calculator 20 as ΔWs-Wo-w, -(2), and the value of ΔW/2 and the position are Input the push mAx of the slide 5 detected by the detector 16 to the comparator 21,
From the lowering control device 22 to the motor 1 so that the deviation becomes 0,
It is possible to output a command signal for 0.

The slides 5 are guided by a guide (not shown) and reciprocate in the width direction with the material 8 in between by rotation of the crankshaft 2, so that the slides 5 approach and move away from each other.

When actually starting operation, the temperature T of the material 8 is detected by the temperature detector 18, and the spring constant Km of the material 8 corresponding to the temperature T is selected from the setting device 19 and input manually to the calculator 20. At the same time, the spring constant KP and predicted load py of the press device, which are set in advance by the setting device 19, are manually inputted to the calculator 20, and the predicted strain amount Δwy is calculated by the calculator 20 from the above-mentioned formula (
1), and the value of ΔWy/2 is calculated based on the comparator 21
is input to. At the same time, the comparator 21 has a position detector 1θ.
The push-in IkAx of the slide 5 detected at is input, the value of AWy/2-Ax is determined, and a command signal is output from the lowering control device 22 to the motor 10 so that the deviation becomes O, and the motor lO The worm wheel 12 is rotationally driven via the worm 11. When the worm wheel 12 is rotationally driven, the worm wheel 1
2 through a spline rotates, and the nut 7 screwed onto the screw shaft 9 moves in the axial direction of the screw shaft 9, so that the slide 5 moves along a guide (not shown). The material 8 is moved forward and backward in the width direction of the material 8, and the gap between the left and right molds 15, 15 is adjusted to a value that takes into account the pressing device and the elastic white compression of the material 8. When the crankshaft 2 is rotated by a drive device (not shown) in this state, the slide 5 moves toward and away from the material 8 along the guide via the connecting rod 4, and the conveyor table The material 8 placed on top (not shown) and fed is reduced in width by a mold 15.degree. 15 to a size quite close to the set width Wo.

Subsequently, when the width dimension W1 of the material 8 that has been actually width-reduced is detected by the width detector 17, the width dimension W1 detected by the width detector 17 and the setting device 23 are stored in the arithmetic unit 20. Only the set width Wo, which is preset by , is inputted, the actual distortion QIJW is calculated by the arithmetic unit 20 based on the above-mentioned formula (2), and the value of AW/2 is inputted to the comparator 21. . At the same time, the comparator 21 is manually inputted with the push-in ff1fflx of the slide 5 detected by the position detector 16, and the value of AW/2-Ax is obtained, and the reduction control device 22 is operated so that the deviation becomes 0. A command signal is output to the motor 10, the slide 5 moves forward and backward in the width direction of the material 8 in the same way as described above, and the gap between the left and right molds 15 and 15 is adjusted based on the actual detected value, The mold 15.
At step 15, the material 8 is rolled down to the set width Wo with high precision.

In this way, the width dimensional accuracy of the apparatus configured from the start of operation can be greatly improved, and the yield of the product that is horizontally rolled after width reduction is also improved.

Note that the width reduction control method of the width reduction press device of the present invention is not limited to the above-described embodiments, but may include a method in which each of the slides is slidable in the slab width direction on a feed guide that can reciprocate in the slab longitudinal direction. It goes without saying that various modifications may be made without departing from the gist of the present invention, such as being applicable to a sliding width reduction press device in which the present invention is fitted.

[Effects of the Invention] As explained above, according to the width reduction control method of the width reduction press device of the present invention, materials of various materials and thicknesses can always be reduced in width with good width dimension accuracy, and after width reduction This has the excellent effect of improving the yield of horizontally rolled products.

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the present invention. 8 is a material, 15 is a mold, 16 is a position detector, 17 is a width detector, 18 is a temperature detector, 19.23 is a setting device, 20 is a calculator, 21 is a comparator, and 22 is a reduction control device. show.

Claims (1)

[Claims] 1) At the start of operation, the temperature of the material is detected, and the spring constant of the material and the spring constant of the press device are determined according to the temperature, the type of material, the plate thickness, and the rolling length of the mold. , From the predicted load applied to the material, calculate the predicted strain amount for the set width of the material to be width-reduced, and set the indentation amount of the mold to be large so that the gap between the molds is narrower than the set width by the predicted strain amount. A width reduction control method for a width reduction press device characterized by: 2) At the start of operation, the temperature of the material is detected, and the spring constant of the material, the spring constant of the press device, and the predicted load applied to the material are determined according to the temperature, material type, plate thickness, and rolling length of the mold. From this, calculate the predicted strain amount for the set width of the material to be rolled down, and set the pushing amount of the mold large so that the gap between the molds is narrower than the set width by the predicted strain amount, and after starting the operation, Detect the width dimension of the material that has actually been rolled down in width, compare the width dimension with the set width to find the actual amount of strain for the set width of the material that has been rolled down in width, and press the mold according to the actual amount of strain. A width reduction control method for a width reduction press device, the method comprising adjusting the amount.