JP2768065B2 - Speed control method of die set cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an H-section steel, a C-section steel,
The present invention relates to a method for controlling a speed of a die set cutting machine for cutting materials such as a shape steel such as a shape steel and an L-shape steel, a steel pipe and a steel plate.

[0002]

2. Prior Art and Problems to be Solved by the Invention
In this type of die-set cutting machine, in which the moving speed of the cutting material and the moving speed of the traveling cart are completely synchronized, the cutting end surface of the material comes into contact with the ascending and descending cutting blade at the time of cutting. . For this reason, the cutting blade is not easily returned after cutting, and the hole shape of the cutting blade through which the material penetrates is closed.

As shown in FIG. 2, the die set cutting machine strikes the knocker 3 with the hammer 4 to move the movable blade of the cutting blade 19 to cut the material 7. At this time, the traveling vehicle 16 (see FIG. 1A) is instantaneously sandwiched between the hammer 4 and the traveling rail (not shown), and the traveling speed of the traveling vehicle 16 decreases. The moving cutting material 7 also momentarily stops, and curves and escapes (see FIG. 3). At the same time as the cutting is completed, the restraining force is released, so that the cutting material attempts to return to the original state, the cutting end face advances, and the cutting blade is hit.

Further, even if the cutting line stops or does not stop due to the abutting state of the cutting material, the end surface of the material is shaved by the cutting blade and chipping of the blade occurs. This leads to a problem of shortened life.

[0005] Thus, the control of the movement speed of the die set cutting machine is important in terms of quality control and yield of the cutting material, conventionally about this velocity control, die set Shah the strip (cut material) Only the speed control to enable the vehicle to cut at exactly the same speed (Japanese Patent Application Laid-Open
No. 48-90091) is generally known.

[0006] Therefore, it has been desired to provide a method for controlling the moving speed to prevent the cutting material from hitting as described above.

[0007] The present invention has been made in view of the above-mentioned circumstances, and an object thereof is that when cutting is performed after being completely synchronized with the moving speed of the cutting material, the cutting end face of the material comes into contact with the cutting blade in the cutting machine. An object of the present invention is to provide a speed control method of a die set cutting machine that can prevent a cutting material from hitting a cutting blade, which is generated when the cutting blade returns poorly.

[0008]

DISCLOSURE OF THE INVENTION The die set cutting of the present invention
The speed control method of the cutter is based on the moving blade through which the material to be cut passes.
A cutting knife consisting of a fixed blade and
The moving blade is moved by the hammer of the cutting drive
Press the knocker to move and move the moving blade and return
Die set cutting to return the moving blade by spring
In the cutting machine, set the die set up to the moving speed of the material to be cut.
Speed up the traveling trolley of the cutting machine and tune it to the speed of the material.
Die set cutting that decelerates and returns to the original position after cutting
Cutting speed of the moving blade.
The completion of cutting of the material by the
(Spindle and post) movement, and the same
Sometimes, the traveling vehicle is further shifted by a predetermined value from the synchronized speed.
And the traveling speed of the traveling vehicle is higher than the material traveling speed.
Faster material cutting edge and die set cutting machine
Separate the cutting blade and the moving blade during this time.
Return movement by the spring, and run after detecting the completion of cutting.
When the traveling trolley accelerates by a predetermined distance, the traveling trolley is decelerated.
And return to return.

By separating the cut end face of the material from the cutting blade in the die set cutting machine, the cut end face of the material and the cutting blade in the cutting machine come into contact with each other.
The present invention is intended to prevent a cutting material from hitting the cutting blade, which is caused by the poor return of the cutting blade.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for controlling the speed of a die set cutting machine according to the present invention will be described below with reference to the illustrated embodiments.

First, an example of a control device for controlling the moving speed of the die set cutting machine by the speed control method of the present invention will be described. The control device 1 (FIG. 1 (A) and FIG.
Hammer 4 that hits a knocker 3 (which moves a moving blade of a cutting blade 19) in a die set cutting machine 2.
The cutting condition detecting unit 6 is provided in the lifting drive unit 5 for detecting the completion of cutting, the material condition detecting unit 8 for detecting the traveling distance and speed of the cutting material 7, and the cutting condition and material condition detecting unit. A digital regulator 9 to which values from 6, 8 are inputted, and an analog regulator to which a speed reference voltage from this digital regulator 9 is inputted
It consists of 10. In FIG. 2, reference numeral 24 denotes a return spring, 25 denotes a slide block, and 26 denotes a guide block.

The controller 1 sends an operation signal from the analog regulator 10 to the DC motor 12 via the thyristor 11 based on the speed reference voltage from the digital regulator 9 based on the information of the cutting state and material state detecting sections 6 and 8. The DC motor 12 rotates the pinion 14 via the speed reducer 13 to move the rack 15, thereby moving the traveling cart 16 of the cutting machine 2.

When the traveling vehicle 16 moves, a position feedback signal is transmitted from the DC motor 12 via the pulse oscillator 17 to the digital regulator 9, and a speed feedback signal is transmitted from the DC motor 12 via the pulse oscillator 17 and the voltage converter 18. It is sent to analog regulator 10.

In this embodiment, the material condition detecting section 8 comprises:
It consists of a measuring roll and a pulse oscillator
The amount of material transfer is sent to the digital regulator 9 via 17. As shown in FIG. 1A, a cutting state detecting unit 6 includes a limit switch provided on a knitting core shaft 5a of the lifting drive unit 5.
The cutting condition of the material 7 is detected by detecting the rotation condition of the knitting core shaft 5a. The cutting status detection unit 6 may detect the lifting status of the post 21 that raises and lowers the hammer 4.

Further, the cutting material 7 in this embodiment is an H-section steel. In addition, C-shaped steel, T-shaped steel, L-shaped steel, steel pipe, steel plate, and the like can also be cut.

When cutting the material 7 with the die set cutting machine 2 based on the speed control method of the present invention by the control device 1 having such a configuration, first, the measuring roll Thus, the moving distance of the cutting material 7 is measured, and at the same time, the moving speed is detected.

Next, when the material 7 approaches the set length, the traveling cart 16 of the cutting machine 2 starts, and the pulse oscillator 17 performs control to synchronize with the moving speed of the material 7 while feeding back its own position. It should be noted that the set length is completed when the material speed is synchronized with the material speed.

Next, the material 7 is cut by the cutting blade 19 while the moving speed of the cutting machine 2 is synchronized with the moving speed of the material 7.
This cutting is performed by the motor in the lifting drive unit 5 of the cutting machine 2.
The flywheel 23 is constantly rotated at 22 and the brake 5b side of the lifting drive unit 5 is released by the disconnection command, and the eccentric shaft 5a is rotated by connecting the clutch 5c, and the hammer 4 of the post 21 connected thereto is connected. Pushes down the knocker 3 of the cutting machine 2 and the pressing force of the return spring 24
When the moving blade of the cutting blade 19 moves downward against
The material 7 is cut, and the cutting is completed at the lower limit of the hammer 4.
Will be. After that, the hammer 4 of post 21 moved up.
Then, the brake 5b is connected, and the eccentric shaft 5a is stopped at the original position . The moving blade of the cutting blade 19 is a return spring 24.
To move up by the pressing force of
One cycle ends.

The cutting blade 19 is moved downward by the movable blade.
Limit switch 20 that the completion of cutting, attached to the eccentric shaft 5a
(Or raising and lowering of the hammer 4 connected to the post 21)
The traveling cart 16 of the cutting machine 2 is accelerated by a predetermined value (5 to 30% of the tuning speed) simultaneously with the detection of the completion of the cutting. As a result, the cutting end face of the material 7 is separated from the moving blade of the cutting blade 19, and the moving blade is returned to the original position during the separation. At this time, if the acceleration value of the traveling vehicle 16 is small, the effect is small, and if the acceleration value is too large, the traveling amount of the traveling vehicle 16 becomes large, and the cut end face of the material 7 may come off the die set.

Run for a set distance from the cutting completion detection
When the traveling trolley 16 accelerates , the traveling trolley 16 is decelerated and retracted, and the cutting operation of the cutting machine 2 is completed. The traveling cart of the cutting machine 2 at the time of cutting the material by the method of the present invention.
The 16 speed control situations are shown in the schematic diagram of FIG.

[0021]

According to the control method of the present invention, since the cutting edge of the material can be separated from the moving blade of the cutting blade in the cutting machine after the completion of cutting, the moving blade of the cutting blade is returned to the original position. Since there is no resistance, the return of the moving blade at the cutting blade is quick. Therefore, even if the movement of the movable blade is somewhat slow due to the intrusion of foreign matter, etc., since there is much time margin when returning the movable blade to its original position,
During this time it can be completely restored.

Therefore, it is possible to eliminate an accident in which the end face of the cutting material collides with the moving blade face, thereby reducing the wear and chipping of the cutting blade, and at the same time, cutting off the cutting edge of the material. Flaws) can be eliminated. In addition, the end of the cutting movement of the movable blade, that is, the cutting
After the traveling bogie is accelerated by the disconnection completion detection, the moving blade returns.
Deceleration and retreat immediately without detecting
Therefore, the traveling distance of the traveling cart can be minimized,
Preventing the cut end surface of the material from coming off the traveling cart
And shorten the cutting cycle time
Can be.

[Brief description of the drawings]

FIG. 1A is a schematic front view showing a control device for implementing a speed control method of a die set cutting machine according to the present invention, and FIG. It is a schematic diagram which shows a speed control situation.

FIG. 2 is a schematic cross-sectional view taken along line AA of FIG.

FIG. 3 is a schematic front view showing a state in which a cutting material is hit against a cutting machine at the time of cutting.

[Explanation of symbols]

1 ... Control device, 2 ... Die set cutting machine, 3 ... Knocker,
4 hammer, 5 elevating drive unit, 5a braided core shaft, 5b brake, 5c clutch, 6 cutting state detecting unit, 7 cutting material, 8 material state detecting unit, 9 digital regulator, 10 ... Analog regulator, 11 ... Thyristor, 12
... DC motor, 13 ... reducer, 14 ... pinion, 15 ... rack, 16 ... carriage, 17 ... pulse oscillator, 18 ... voltage converter, 19 ... cutting knife, 20 ... limit switch, 21 ... post, 22 ... motor , 23 ... flywheel, 24 ... return spring, 25 ... slide block, 26 ... guide block.

Claims (1)

(57) [Claims] A moving blade and a fixed blade through which a material to be cut passes.
A cutting blade consisting of
Knock of the movable blade by the hammer of the cutting drive unit
Key to cut and move the moving blade and return spring
Die set cutting machine that moves the movable blade
In the speed control method in the die set cutting machine, the traveling cart of the die set cutting machine is accelerated to the moving speed of the material to be cut, and after cutting in synchronization with the speed of the material, the cutting speed is reduced and returned to the original position. Yes, the completion of the cutting of the material by the cutting movement of the movable blade is cut.
Detected by the movement of the drive member of the drive unit,
At the same time , the traveling vehicle is accelerated by a predetermined value more than the synchronization speed , the traveling speed of the traveling vehicle is made faster than the traveling speed of the material, and the cutting end face of the material and the cutting by the die set cutting machine are performed. along with the pulling away to a knife, Rita moving blade during this time
Return movement by the spring
When the traveling vehicle accelerates by a predetermined distance, the traveling vehicle is decelerated.
A method for controlling the speed of a die set cutting machine, wherein the speed of the die set cutting machine is returned .