JPH0472607B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a rolling device for stacking and crimping plate materials such as steel plates in multiple layers, and particularly for rolling an intermediate material for adhering plate materials between the plate materials. This invention relates to an automated rolling machine.

[Prior art and its problems]

The configuration of a conventional rolling mill of this type is shown in FIG.

In FIG. 5, both the steel plates of the upper material 1 and the lower material 2 to be crimped and rolled, and the intermediate material 3 such as a plastic material to which the upper and lower materials 1 and 2 are bonded by heating, are each tension-controlled. rewinding machine 4, 5,
6, passes through entry side bridle rolls 7, 8 and intermediate material pinch rolls 9, each of which has a speed controlled, and then passes through a crimping stand 10 whose speed is controlled.
The sheet is passed through the sheet metal plate, is overlapped and crimped and rolled, and further passed through a speed-controlled exit bridle roll 11 and wound up on a winder 12. At that time, intermediate material 3
(hereinafter referred to as intermediate material speed) is the first pinch roll 13, first bridle roll 14, and second bridle roll 15 provided between the unwinding machine 6 and the intermediate material pinch roll 9. and the rotational speed of the second bridle roll 16.

Said roll group 13 for controlling intermediate material speed
16 are rotationally driven by the same drive device 17, and the resulting intermediate material speed is detected by an intermediate material speed detector 18 and fed back to a speed controller 19. The speed control device 19 compares the fed-back intermediate material speed with the target speed set by the operator, which is input from the target speed setting device 20 via the target speed calculation circuit 21, and sets the intermediate material speed equal to the target speed. The drive device 17 is controlled so as to.

In such a conventional apparatus, at the start of overlapping rolling, first, only the upper material 1 and the lower material 2 are passed to the crimping stand 10 at a predetermined low speed. Next, the operator inserts the intermediate material 3 between the upper material 1 and the lower material 2, and starts overlapping rolling at a low speed. Then, while the slack in the intermediate material 3 provided on the input side of the intermediate material pinch roller 9 is being removed, the operator starts the intermediate material 3 and operates the target value setting device 20 to set the intermediate material 3. As the speed increases, the intermediate material 3 and the upper and lower materials 1 and 2 are adjusted to have the same speed when the slack is gone. After confirming that overlapping rolling is being performed reliably at low speed, the operator accelerates the entire line to a predetermined steady rolling speed and begins steady rolling. Further, in the above process, the operator finely adjusts the speed setting device 18 from beginning to end and performs tension control so that an appropriate tension is always applied to the intermediate material 3.

As described above, in conventional rolling equipment, the initial threading of the intermediate material 3 must be done manually by the operator, which poses a great operational risk to the operator, and if the operator is not skilled, the intermediate material 3 may be threaded manually. There was a problem in that the thickness of the material was non-uniform, resulting in poor yield and reduced work efficiency.

[Purpose of the invention]

The present invention was made in view of the above problems, and
It is an object of the present invention to provide a rolling device that can automatically perform an initial threading operation of an intermediate material without relying on manual operations by an operator.

[Summary of the invention]

In order to achieve the above object, the first invention includes a rolling speed detection means for detecting the rolling speed in a crimping stand, and outputs an intermediate material start command upon detecting that the rolling speed has reached a predetermined reference speed. a start timing detection means for detecting the tension of the intermediate material; a re-acceleration time detection means for detecting that the tension has reached a predetermined reference tension and outputting an intermediate material re-acceleration command; A target speed that outputs a first target speed that is lower than the rolling speed in response to an intermediate material start command, and outputs a second target speed that is approximately equal to the rolling speed in response to the intermediate material re-acceleration command. An output means is provided, and the intermediate material speed is controlled according to the target speed from the target speed output means.

In addition to the configuration of the first invention, a second invention includes target speed correction means for correcting the target speed output from the target speed output means based on a speed correction amount; The gist is that tension control means is provided for calculating the speed correction amount and outputting it to the target speed correction means so that the tension is maintained at a predetermined target tension.

[Embodiments of the invention]

The present invention will be explained below with reference to embodiments shown in FIGS. 1 to 4.

FIG. 1 is a configuration diagram showing an embodiment of a rolling apparatus according to the present invention. Components that are the same as those in FIG. 5 are denoted by the same reference numerals, and explanations thereof will be omitted.

In FIG. 1, a target speed calculation circuit 22 calculates a speed that is lower by a predetermined speed difference than the target speed set by the operator according to the output voltage of the target speed setting device 20 operated by the operator, and calculates a speed that is lower by a predetermined speed difference than the target speed set by the operator. When a start command is received, the calculated low speed is output to the intermediate material speed control device 19 as the target speed during initial rolling, and when a re-acceleration command, which will be described later, is received, the target speed set by the operator is set as the target speed during steady rolling. It is output to the intermediate material speed control device 19. Here, the target speed during steady rolling is usually set to the same speed as the steady rolling speed in the crimping stand 10. Further, the speed difference is the intermediate material 3
It is set according to the thickness of the intermediate material, the control characteristics of the intermediate material speed control device 19, etc. Incidentally, the operator may set both the steady rolling target speed and the initial sheet passing target speed using the target speed setting device 20, and store these in the target speed calculation circuit 22.

The target speed output from the target speed calculation circuit 22 is sent to the intermediate material speed control device 19 via the adder 23.
is input to. The adder 23 adds a speed correction amount, which will be described later, to the target speed.

On the downstream side of the roll groups 13 to 16 that control the intermediate material speed, there is a tension detector 2 that detects the tension of the intermediate material 3.
4 is provided, and a tension detection signal from this tension detector 24 is input to a tension control device 25. The tension control device 25 functions as a tension control means, and also functions as a re-acceleration timing detection means in conjunction with a timing detection device 27, which will be described later. That is, when the tension control device 25 detects that the tension detection value by the tension detector 24 has risen above a predetermined reference tension, it outputs a rise detection signal to the timing detection device 27, and the timing detection device 27 detects the rise. Immediately upon receiving the detection signal, a tension control start command is output to the tension control device 25. Tension control device 2
5 calculates the speed correction amount based on the tension deviation in order to adjust the intermediate material speed so that the tension deviation between the tension detection value and the target tension is minimized at the same time as receiving the tension control start command; Adder 2
Output to 3.

The crimping stand 10 is provided with a rolling speed detector 28 for detecting the rolling speed, and the rolling speed detection signal is input to the timing detecting device 27. When the timing detection device 27 detects that the rolling speed detection value from the rolling speed detector 28 has reached the steady rolling speed, it sends the intermediate material start command to the target speed calculation circuit 22, and then, as described above, When the rising detection signal is input from the tension control device 25, the tension control start signal is sent back to the tension control device 25, and the target speed calculation circuit 22
The intermediate material re-acceleration command is sent to the intermediate material re-acceleration command.

Next, the operation of this embodiment will be explained.

First, the operation during the initial threading of the intermediate material 3 will be explained.

FIG. 2 is a speed pattern diagram illustrating speed control during initial threading of the intermediate material 3 according to this embodiment.

In FIGS. 1 and 2, at the start of rolling, only the upper material 1 and the lower material 2 are passed through the crimping stand 10, and rolling of only the upper material 1 and the lower material 2 is started (time t ₁ ). When the rolling speed (FIG. 2a) increases and reaches the steady rolling speed, the intermediate material start command is output from the timing detection device 27 to the target speed calculation circuit 22, and the target speed calculation circuit 2
2, the speed reference at the time of initial sheet passing is outputted (time t ₂ ). At this time, since the speed correction amount has not yet been output from the tension control device 25, the target speed at the time of initial sheet passing is inputted to the speed control device 19 as is. As a result, the speed control device 19 starts the roll groups 13 to 16 via the drive device 17 (time
t ₃ ), the intermediate material 3 is accelerated toward the initial sheet passing speed reference as shown in graph b.

In addition, the intermediate material pinch rolls 9 are also activated around the time when the intermediate material 3 starts to be conveyed, and when the tip of the intermediate material 3 is inserted between the upper and lower materials 1 and 2, the upper and lower materials 1 and 2
Pressing and rolling of the intermediate material 3 and the intermediate material 3 is started. Since this compression rolling is carried out at the steady rolling speed,
The slack in the intermediate material 3 provided on the entry side of the intermediate material pinch roll 9 disappears, and in the meantime, the intermediate material speed reaches the target speed at the initial threading (time
_t4 ). Since this target speed at the time of initial sheet passing is lower than the rolling speed of the crimping stand 10 at this time, that is, the steady rolling speed by the speed difference α, the intermediate material 3 is is pulled from the crimping stand 10 and the tension suddenly rises. In other words, this rise in tension is caused by the intermediate material 3
is an index indicating that the sheet has been reliably passed through the crimp stand 10. When the tension control device 25 detects the rise based on whether the tension reaches a predetermined reference tension or more, it outputs the rise detection signal to the timing detection device 27. As a result, the intermediate material re-acceleration command is sent from the timing detection device 27 to the target speed calculation circuit 22, and the target speed during steady rolling is outputted from the target speed calculation circuit 22.
At the same time, the timing detection device 27 sends the tension control start command to the tension control device 25, and the tension control device 25 outputs a speed correction amount corresponding to the tension deviation. The steady rolling target speed and the speed correction amount are added by the adder 23 and input to the speed control device 19, and the speed control device 19 re-accelerates the intermediate material 3 according to the input target speed ( time _t5 ). That is, the speed control device 19 accelerates the intermediate material 3 toward the steady rolling speed while performing tension control so that the tension of the intermediate material 3 approaches the target tension, and rolls the intermediate material 3 to almost the steady rolling speed. After accelerating to the same speed (time t ₆ ), the speed control shifts to steady rolling. In this way, the initial threading of the intermediate material 3 is automatically and smoothly performed.

Next, the operation during steady rolling will be explained.

FIG. 3 is a time chart illustrating the speed control of the intermediate material 3 during steady rolling according to this embodiment,
Figure A shows the relationship between the tension of the intermediate material 3 and the target tension, Figure B shows the holding operation of the speed correction amount performed inside the tension control device 25, and Figure C shows the state of the speed correction amount. Each is shown below.

As shown in FIG. 3, the tension control device 2
5, when the target tension is given, sets a tension control range of a predetermined width centered on the target tension as shown by hatching, and sets its upper limit as the target tension upper limit,
The lower limit value is determined as the target tension lower limit value. When the tension of the intermediate material 3 is larger than the target tension upper limit value, the tension control device 25 calculates and outputs a speed correction amount corresponding to the tension deviation, whereby the intermediate material 3 is accelerated and its tension is lowered. controlled. As a result, when the tension decreases and enters the tension control range (time _t7 ), the tension control device 26 maintains the speed correction amount at that time.

As a result, the speed correction amount is kept constant regardless of changes in the pre-tension, so the tension will eventually deviate from either the tension reference upper limit or lower limit. For example, if the tension becomes equal to or less than the target tension lower limit (time t ₈ ), the tension control device 25 releases the holding of the speed correction amount and again calculates and outputs the speed correction amount corresponding to the tension deviation. . As a result, the intermediate material 3 is decelerated and its tension is controlled in the upward direction.

In this way, the tension control device 25 maintains the speed correction amount when the tension is within the tension control range, and when the tension falls outside the tension control range, the tension control device 25 corrects the speed according to the tension deviation. Control is executed to output the amount and accelerate/decelerate the intermediate material 3 to return the tension to the tension control range. As a result, the intermediate material 3 is threaded while its tension is almost always kept within the tension control range, and as a result, the thickness of the intermediate material 3 is kept almost uniform, improving the product yield. .

FIG. 4 is a configuration diagram showing a modification of the embodiment shown in FIG. 1, and the same components as in FIG. 1 are given the same reference numerals.

In this modification, the timing detection device 2
7 outputs only the intermediate material re-acceleration command when receiving the rising detection signal from the tension control device 25;
As a result, the intermediate material is accelerated again, and the tension control start command is output when the speed reaches a predetermined ratio to the steady rolling speed, for example, when the speed becomes equal to the steady rolling speed. Therefore, tension control is not performed while the intermediate material 3 is being re-accelerated, but there is no problem as long as the re-acceleration is done quickly, and even if this is done, the initial threading of the intermediate material 3 can be carried out smoothly. It can be carried out.

〔Effect of the invention〕

As explained above, according to the first and second inventions, the intermediate material is threaded between the plates at a speed lower than the rolling speed, and the threading of the intermediate material is ensured from the rise of tension in the intermediate material. Since this is detected and the intermediate material is accelerated to the rolling speed, the initial threading of the intermediate material can be performed automatically without relying on manual operations by an operator.

Furthermore, according to the second invention, in addition to the speed control described above, tension control is also performed to maintain the tension of the intermediate material at a predetermined target tension, so the operator does not need to perform tension control, and the product quality is improved. Yield is also improved.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of a rolling apparatus according to the present invention, FIG. 2 is a diagram illustrating speed control during initial sheet passing of an intermediate material according to the same embodiment, and FIG. 3 is a diagram showing the same embodiment. FIG. 4 is a block diagram showing a modification of the same embodiment, and FIG. 5 is a block diagram showing a conventional rolling apparatus. 1...Top material, 2...Bottom material, 3...Intermediate material, 4...
... Rewinding machine for upper material 1, 5... Rewinding machine for lower material 2,
6... Unwinding machine for intermediate material 3, 7... Entry side bridle roll for upper material 1, 8... Entry side bridle roll for lower material 2, 9... Pinch roll for intermediate material, 10...
...Crimp stand, 13...First pinch roll,
14...first bridle roll, 15...second
Bridle roll, 16...Second pinch roll, 17...Drive device, 18...Intermediate material speed detector, 19...Speed control device, 20...Target speed setting device, 22...Target speed calculation circuit , 23... Adder, 24... Tension detector, 25... Tension control device, 26... Target tension setting device, 27... Timing detection device, 28... Rolling speed detector.

Claims (1)

[Claims] 1. A crimping stand for overlapping and crimping a plurality of plate materials, a plate conveyance mechanism for feeding each plate material to the crimping stand, and an intermediate material for adhering plate materials between the plate materials fed to the crimping stand. and an intermediate material speed control means that drives and controls the intermediate material transport mechanism so that the speed of the intermediate material matches an input target speed. a rolling speed detection means for detecting the rolling speed of the plate material; a start time detection means for detecting that the rolling speed detected by the rolling speed detection means has reached a predetermined reference speed and outputting an intermediate material start command; a tension detection means for detecting the tension of the intermediate material; a re-acceleration time detection means for detecting that the tension detected by the tension detection means has reached a predetermined reference tension and outputting an intermediate material re-acceleration command; In response to an intermediate material start command from the start timing detection means, the first rolling speed is lower than the rolling speed.
outputting a target speed of to the intermediate material speed control means;
Target speed output means for outputting a second target speed substantially equal to the rolling speed to the intermediate material speed control means in response to an intermediate material acceleration command from the re-acceleration time detection means. rolling equipment. 2. A crimping stand for superimposing and crimping a plurality of plate materials, a plate conveyance mechanism for feeding each of the plate materials to the crimping stand, and an intermediate material conveyance mechanism for feeding an intermediate material for bonding plate materials between the plate materials fed to the crimping stand. and intermediate material speed control means for driving and controlling the intermediate material conveying mechanism so as to match the speed of the intermediate material to the input target speed, wherein the rolling speed of the plate material in the crimping stand is detected. a rolling speed detection means for detecting that the rolling speed detected by the rolling speed detection means has reached a predetermined reference speed, and a start timing detection means for outputting an intermediate material start command; a tension detection means for detecting; a re-acceleration time detection means for detecting that the tension detected by the tension detection means has reached a predetermined reference tension and outputting an intermediate material re-acceleration command; and the start time detection means. In response to the intermediate material start command, the first rolling speed is lower than the rolling speed.
outputting a target speed of to the intermediate material speed control means;
Target speed output means for outputting a second target speed substantially equal to the rolling speed to the intermediate material speed control means in response to an intermediate material re-acceleration command from the re-acceleration time detection means; target speed correction means for correcting an output target speed based on a speed correction amount, and adjusting the speed correction amount based on the tension detected by the tension detector so that the tension is approximately maintained at a predetermined target tension. A rolling apparatus comprising tension control means for calculating and outputting the calculated result to the target speed correction means.