JPH0780149B2 - Numerical control tuning method for a rotary cutter with two units for cutting a sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a corrugating machine, which is a machine for producing corrugated board sheets, for each cutting dimension in a direction perpendicular to a direction in which plate-like sheets continuously flow. A downstream rotary cutter that cuts into two parts, and an upstream order production length of plate-shaped sheets when changing orders and removal of defects, or an upstream that cuts the length of defective parts in a direction perpendicular to the direction in which the plate-shaped sheets continuously flow. The present invention relates to a method for tuning the numerical control of a two-piece rotary cutter for cutting a plate-shaped sheet, which is adapted to perform numerical control tuning with a side rotary cutter.

Conventional technology Conventionally, a rotary shear and a rotary cutter were placed at appropriate positions in the flow direction of the plate-like sheet, and the upstream rotary shear cuts them for order replacement or removal of defective parts. In the mechanism in which the functions are divided so as to perform the cutting of the sheet, the upstream rotary shear is appropriately activated to cut the sheet into a plate shape when the worker changes the order and the defect is removed. Since the rear end of the sheet cut by the rotary shear and the rear end of the sheet cut by the downstream cutter do not coincide with each other, there is a drawback that an unnecessary loss sheet is generated.

Further, as disclosed in Japanese Patent Laid-Open No. 61-242999, a means for detecting the sheet length passing through a rotary cutter for continuously cutting a plate-like sheet and a means for cutting the sheet after the defective removal shear is activated. A device for controlling the start timing of the shear is provided so that a means for calculating the passing sheet length is provided and the sheet cutting portion first cut by the shear matches the sheet cutting portion by the rotary cutter. However, according to the apparatus, the sheet position immediately below the shear is constantly detected to calculate the sheet cutting total length, and thereby the target cutting position is started at the predetermined timing and the shear is started to load the sheet. Since it is cut, even if the sheet speed is slight after the start to the shear until the cutting, the sheet production speed will be 250 m / min ~ 300 m / min In the high-speed area, the shear cuts a point deviating from the target position, and the cutting position of the shear and the cutting position of the cutter do not match, which causes unnecessary sheets and confusion in the downstream process. Therefore, it has a drawback that the productivity is lowered.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the dry end control section of the corrugating machine system, which is the above-mentioned drawback, the present invention is to cut the upstream side cutter and the plate-shaped sheet for changing the order of the plate-shaped sheet or removing the defective part. Cuts for each cutting dimension, eliminates the generation of unnecessary loss sheets due to the mismatch of cutting positions with the downstream cutter, improves productivity, and attaches simple electronic devices and sensors to existing equipment It is intended to provide a numerical control tuning method of a two-piece rotary cutter for cutting a plate-shaped sheet, which is capable of performing accurate synchronous control only by itself.

[Structure of Invention]

Means for Solving the Problems In view of this point, the present invention has two rotary cutters arranged at appropriate positions in the flow direction of a plate-like sheet, and cuts for order change or removal of defective parts by an upstream cutter. In addition to the above, in the mechanism that divides the function so that the downstream side cutter cuts at the order cutting length, the order change cutting position for the position where the downstream side cutter cuts in the future, or the nearest cutting position of the defective part Judgment is made, the distance between these positions and the upstream cutter is calculated, and this value is transferred to the upstream cutter as the distance between the upstream cutter and its first cutting target point, and when this value reaches the specified value Is the cutting timing of the upstream cutter,
After the upstream cutter cuts, normal cutting is performed while measuring the distance between the trailing edge of the sheet and the downstream cutter, and after the cutting to the trailing edge of the sheet is completed, the cutting mode of the downstream cutter is set to normal cutting length. Change to the leading edge cutting mode for cutting the leading edge of the sheet that arrives after cutting, wait, and measure the distance between the leading edge of the sheet after the upstream cutter and the downstream cutter according to the sheet flow length. When the value reaches a preset value, the tip cutting mode of the downstream cutter is activated, and after this cutting, the cutting length is changed to normal cutting length cutting, and to the appropriate position in the plate sheet flow direction. Place a rotary cutter on the table, and use the upstream cutter to change the order or cut to remove defective parts,
In a mechanism that divides the function so that the downstream cutter cuts at the order cutting length, the downstream cutter cuts the upstream cutter that performs cutting operation for order replacement or defect removal with the previous order cutting length in the future. After driving so that the target cutting point is the final cutting point to be cut, cutting is performed zero to several times at a specified cutting length, and if a separated sheet portion occurs, this is cut downstream. Remove it further, do not cut the downstream cutter at the rear end of the previous order cutting length and the tip of the next order cutting length, and cut from the position moved by the next order cutting length from the tip of the next order cutting length. By controlling the start of the cutting, the downstream cutter is configured to prevent the cutting of the sheet having the cutting length other than the preceding order cutting length and the next order cutting length. Provides a numerical control method of synchronizing configuration rotary cutter is obtained by St. overcome the above drawbacks.

Effect The present invention is a downstream rotary cutter that cuts a plate-shaped sheet at each cutting dimension in a dry end section in a corrugated machine that is a machine for producing corrugated board sheets, and an order of plate-shaped sheets when order change and defect removal. In the configuration with the upstream rotary cutter that cuts the plate length sheet of the entire production length or the length of the defective portion, the remaining production length of the upstream cutter is calculated by a counter and a calculator, etc., rather than a sensor and a pulse generator. When the remaining production length reaches a predetermined value, the upstream cutter cuts the trailing edge of the sheet by the cutting signal of the downstream cutter, and the downstream cutter cuts the trailing edge of the sheet. Control tuning is performed.

In addition, the upstream cutter calculates the final cutting point of the cutting length of the downstream cutter with the signal from the sensor and the pulse generator by the counter and the arithmetic unit, cuts by the upstream cutter, and then cuts each order by the downstream cutter. Numerical control tuning is performed so that cutting is performed only by the cutting length.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 is a dry end mechanism, in which an upstream cutter 2 and a downstream cutter 3 are appropriately arranged in a flow direction of a plate-like sheet W, and a slitter scorer 4 and 5 is appropriately arranged between the upstream cutter 2 and the downstream cutter 3.

The upstream cutter 2 has a sheet flow length detection pulse generator 6,
Installed the proximity sensor 7 for cutter cutting detection,
A drive DC motor 8 and a cutter blade tip rotation length detection pulse generator 9 are installed.

The downstream cutter 3 has a sheet flow length detection pulse generator 10,
A cutter cutting detection proximity sensor 11 is installed, and a drive DC motor 12 and a cutter blade edge rotation length detection pulse generator 13 are installed.

Reference numeral 14 denotes a dry end controller, which includes a cutter controller 15, a cutter controller 16, a defective portion management control unit 17,
Calculator 18, production quantity preset type subtraction counter 19, cutting length register 20, tip tracking preset type subtraction counter 2
1, pulse train signal switch 22, logic circuit 23, data switch 2
4. The cutting length correction controller 25 is used.

Next, the numerical control tuning circuit according to the present invention will be described. The output signals from the sheet flow length detecting pulse generator 6 are the cutter controller 15, the defective portion management control unit 17, the tip tracking preset type subtraction counter 21 and the pulse train signal. The output signals from the cutter cut detection proximity sensor 7 are input to the switch 22 respectively, and the cutter controller 15 and the defective portion management control unit.
17, the tip tracking preset type subtraction counter 21 and the pulse train signal switch 22 are respectively input, and the output signal from the production number preset type subtractor 19 is the pulse train signal switch 22.
The output signal from the cutter cutting detection proximity sensor 11 is input to the cutter controller 16, the defective portion management control unit 17, the pulse train signal switching unit 22, the logic circuit 23, and the production number preset type subtraction counter 19.

In addition, the production number output signal from the production number preset type subtraction counter 19 is input to the calculator 18, and the cutting length register
The cutting length output signal from 20 is input to the D terminal of the computing unit 18 and the cutter controller 16, the cutting length data from the computing unit 18 is input to the D terminal of the cutter controller 15, and the number of discriminating signal is input to the logic circuit 23. The cutting length data from the defective portion management control unit 17 is sent to the cutter controller 15.
Of the cutter controller 15 and the cutter controller 16 so that the start signal from the logic circuit 23 is input to the S terminal of the cutter controller 15.
The start signal from is input to the S terminal of the cutter controller 16.

Then, the switching signal is input from the pulse train signal switch 22 to the cutter controller 16, the drive signal from the cutter controller 15 is given to the drive DC motor 8, and the output signal from the cutter blade edge rotation length detection pulse generator 9 is supplied. The cutter controller 15 is fed back, the drive signal from the cutter controller 16 is given to the drive DC motor 12, and the output signal from the cutter blade edge rotation length detection pulse generator 13 is fed back to the cutter controller 16, and the data switch 24 is Connected between the D terminal of the cutter controller 16 and the cutting length register 20, and at the gate of the data switching unit 24, the production number preset type subtraction counter
The output signal from 19 when the remaining number of sheets is zero is input.

Next, the operation of the numerical control tuning method of the two-piece rotary cutter for cutting plate-like sheets according to the present invention will be explained. Basically, the operation at the time of order change is the residual production length at the cutting position of the upstream cutter 2. In order to output, the production number preset type subtraction counter 19 and the cutting length register 20 respectively, the production number (this data is subtracted from the previous production number each time the cutting detection signal from the cutter cutting detection proximity sensor 11 is input. .) And the cutting length data are input to the calculator 18, and the calculator 18 calculates the remaining production number at the cutting position of the upstream cutter 2, and calculates when the remaining production number is 2 or less. vessel
The output signal from 18 is input to the logic circuit 23, and the logic circuit 23
A flip-flop (not shown) built in is set, the flip-flop is reset by a cutting signal of the next cutter cutting detection proximity sensor 11, and the S circuit of the cutter controller 15 is connected to the upstream side cutter 2 from the logic circuit 23. The cutting start signal is input to the D terminal of the cutter controller 15 from the computing unit 18 and the cutting length data calculated at the same time as the remaining production number (this data is the cutting detection signal from the cutter cutting detection proximity sensor 11). Is subtracted from the previous cutting length data for each time), and the cutter controller 15 is supplied with the production speed from the sheet flow length detection pulse generator 6 and the cutting edge rotation speed from the cutter blade edge rotation length detection pulse generator 9. Is input and the rear end of the sheet is cut by the upstream cutter 2 when the remaining production number at the cutting position of the upstream cutter 2 is zero. There.

Next, regarding the operation of the downstream cutter 3 after the cutting of the upstream cutter 2, the output signal of the cutter cutting detection proximity sensor 7 that detects the cutting of the final end of the sheet by the upstream cutter 2 is the pulse train signal switcher. 22 is input to the gate, and its output is switched from the output signal of the sheet flow length detection pulse generator 6 to the output signal of the sheet flow length detection pulse generator 10 and at the same time, the cutting position of the upstream cutter 2 remains. An output signal of the sheet flow length detecting pulse generator 6 when the trailing edge of the sheet is cut by the upstream cutter 2 when the number of produced sheets is zero, and a predetermined value is preset in the leading edge tracing preset type subtraction counter 21. It is input to the S terminal of the cutter controller 16 and then the downstream side cutter 3 cuts the number of products in the front order, and the output signal of the cutter cutting detection proximity sensor 11 that detects the cutting at that time When the production number preset type subtraction counter 19 becomes zero, a signal indicating that the number of remaining sheets is zero is input to the D terminal of the cutter controller 16 at the gate of the data switching device 24, and at the same time the upstream cutter 2 stops at the top dead center position. The output signal from the cutter disconnection detection proximity sensor 11 switches the output of the pulse train signal switch 22 from the output signal of the sheet flow length detection pulse generator 10 to the output signal of the sheet flow length detection pulse generator 6. The leading edge tracking preset type subtraction counter 21 which tracks the leading edge of the order becomes zero, the leading edge start signal of the downstream cutter 3 is added to the downstream cutter 3, and the leading edge of the next order is cut.

Next, the second invention will be described. It is the same as the first invention until the final cutting of the previous order, and therefore the description thereof will be omitted.

After cutting the previous order at the position of the upstream cutter 2, the production number preset type subtraction counter 19 is preset so that the upstream cutter 2 can be cut several times as appropriate, and the interval between the previous order and the next order is set. A preset type subtraction counter for the number of products and cutting length for the next order
9. The cutting length register 20 is set, the cutter controller 16 transfers the next order from the leading end of the next order by the cutting length of the next order, and then the downstream cutter 3 cuts the next order.

Next, several seconds to ten seconds before the order change, the slitter scorer 4, the slitter scorer 5 and the suction conveyor 26 are increased in advance by several 10% from the speed of the double facer, and the sheet on the downstream side after the first cutting by the upstream cutter 2 is performed. The cutting length correction of the downstream cutter 3 when the double facer speed is sequentially increased to match the speeds of the slitter scorer 4, the slitter scorer 5 and the suction conveyor 26, thereby creating a gap at the cutting point. The production speed transferred from the upstream side of the cutter 2, the distance between the upstream cutter 2 and the downstream cutter 3, the distance between the downstream cutter 3 and the slitter scorer 4, the downstream cutter 3
And the slitter scorer 5, the distance between the downstream cutter 3 and the suction conveyor 26 are input to the cutting length correction controller 25, and the set cutting length of the downstream cutter 3, slitter scorer 4, slitter scorer 5, suction Cutting speed correction controller 25 for each speed of conveyor 26
The downstream cutter 3 cuts after the initial cutting of the upstream cutter 2 is corrected every time by correcting the cutting length of the previous order, and the downstream cutter 3 keeps the accuracy even if there is a speed change. I try to make high cuts.

〔The invention's effect〕

In short, according to the present invention, two rotary cutters are arranged at appropriate positions in the flow direction of the plate-shaped sheet W, and the upstream cutter 2 is provided.
In the mechanism in which the downstream cutter 3 cuts for the purpose of order change or removal of defective parts, and the downstream cutter 3 cuts the function at the order cutting length, The order changing cutting position or the cutting position closest to the defective portion is determined, the distance between these positions and the upstream cutter 2 is calculated, and this value is transferred to the upstream cutter 2 and the upstream cutter 2 and its first cutting target. The distance between the sheet is transferred as a distance to the point, and the time when this value reaches a predetermined value is set as the cutting timing of the upstream cutter 2, and after the upstream cutter 2 cuts, the distance between this sheet rear end and the downstream cutter 3 is measured. Then, the normal cutting is performed while the cutting to the trailing edge of the sheet is completed, and the cutting mode of the downstream cutter 3 is cut to cut the leading edge of the sheet that reaches after the normal cutting length cutting. When the value reaches a preset value by measuring the distance between the sheet front end and the downstream cutter 3 after the upstream cutter 2 cuts after changing to the leading edge cutting mode The start-up cutting mode of the downstream cutter 3 is executed, and after this cutting, the cutting length is changed to a normal cutting length cutting, and two rotary cutters are placed at appropriate positions in the flow direction of the plate-shaped sheet W. In the mechanism in which the upstream cutter 2 cuts the order or cuts for removing the defective portion, and the downstream cutter 3 cuts the function by the order cutting length, the order change or the defect occurs. After the upstream cutter 2 that performs the cutting operation for removal is driven so that the downstream cutter 3 cuts at the final cutting point that should be cut in the future with the previous order cutting length, The cutting length is appropriately cut zero to several times, and when a separated sheet portion is generated, this is removed before the downstream cutter 3, and the downstream cutter 3 is further cut in the entire length of the front order cutting. By cutting the trailing end and the leading end of the next order cutting length without cutting, and starting the cutting from a position moved by the next order cutting length from the leading end of the next order cutting length, the downstream cutter 3 can control A sheet having a cutting length other than the order cutting length and the next order cutting length is not cut, and the cutting points at the sheet rear end portion and the front end portion are set to the upstream cutter 2 and the downstream cutter 3.
Since the dry end control is performed so as to match the cutting position with high precision, order change and defect removal can be performed according to the sheet production speed, and the cutting point between the upstream cutter 2 and the downstream cutter 3 can be changed. Unnecessary lost sheets due to inconsistency can be eliminated, work to remove defects in the plate-like sheet production process is reduced, and extra production operation by each downstream cutter is not performed, so productivity can be improved and costs can be reduced. The practical effect is extremely great.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and FIG. 1 is a mechanical circuit diagram of a dry end section of a numerical control tuning method for a rotary cutter for two plate cutting according to the present invention. Upstream cutter 2, downstream cutter 3

Claims (2)

[Claims] Claims: 1. Two rotary cutters are arranged at appropriate positions in the flow direction of a plate-like sheet and cut by an upstream cutter for order change or removal of defective parts, and a downstream cutter cuts an order cut length. In a mechanism that divides the function so that cutting is performed, the downstream cutter determines the order change cutting position for the future cutting position, or the nearest cutting position of the defective part,
The distance between these positions and the upstream cutter is calculated, and this value is transferred to the upstream cutter as the distance between the upstream cutter and its first cutting target point. After the upstream cutter cuts at the cutting timing of the cutter, normal cutting is performed while measuring the distance between the sheet trailing edge and the downstream cutter, and after cutting to the sheet trailing edge, cutting of the downstream cutter Change the mode from the normal cutting length cutting to the cutting mode for cutting the leading edge of the sheet that arrives later and wait, and set the distance between the leading edge of the upstream cutter and the downstream cutter according to the sheet flow length after cutting. When the value reaches a preset value, the tip cutting mode of the downstream cutter is activated, and after this cutting, it is changed to normal cutting length cutting. Plate-shaped Two configurations rotary cutter of a numerical control method of synchronizing preparative cutting. 2. A pair of rotary cutters are arranged at appropriate positions in the flow direction of the plate-like sheet, and are cut by an upstream cutter for order change or removal of a defective portion, and a downstream cutter is used for cutting an order length. In a mechanism that divides the functions so that cutting is performed, the upstream cutter that performs cutting operation for order replacement or defect removal is cut by the downstream cutter with the previous cutting length and the final cutting point to be cut in the future. After driving so that it will be cut appropriately at a specified cutting length from zero to several times, if a separated sheet part occurs, remove it before the downstream cutter, and further downstream The cutter is not cut at the rear end of the previous order cutting length and the tip of the next order cutting length, and is cut from the position moved by the next order cutting length from the tip of the next order cutting length. By controlling the start of the cutting, the downstream cutter is configured so as not to cut a sheet having a cutting length other than the previous-order cutting length and the next-order cutting length. Numerical control tuning method of rotary cutter.