JP2864899B2 - Steel plate round blade shearing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for shearing a steel plate with round blades.

[0002]

2. Description of the Related Art In the field of side trimming or slitting a steel sheet such as a hot-rolled sheet, a pickling sheet or the like with upper and lower round blades, shearing the steel sheet with a good shearing surface property can improve quality and yield. It is an important issue from the viewpoint of raising.

[0003] The quality of the shear surface properties of a steel sheet is evaluated by the ratio of the shear surface to the fracture surface in the thickness direction, the presence or absence of a strong burnishing surface, the size of burrs, and the like. Factors that determine the quality of such shearing surface properties include steel sheet conditions such as the thickness and material of the steel sheet; clearance (horizontal spacing) and wrap (vertical overlap) between the upper and lower round blades; Shearing conditions such as the feed speed of the steel sheet and the wear level of the round blade are exemplified.

In an operation in which a steel sheet is sheared by upper and lower round blades, the upper and lower round blades are usually taken into consideration in consideration of the steel sheet conditions such as the thickness and material of the steel sheet, the trim allowance of the steel sheet, and the state of wear of the round blade. By setting the appropriate clearance value and lap value, it is attempted to shear the steel sheet with good shearing properties.

[0005]

However, in the above-mentioned operation, the final quality judgment of the shear surface property of the steel sheet is performed based on the visual inspection result of the trim edge surface of the coil wound after shearing. Since the result of this visual inspection is now generally reflected in the shearing conditions of the next material, there are the following problems (1) to (3).

(1) Inspection of a trim edge of a coil is usually performed by
Since the frequency is once every few pieces, if the clearance and lap conditions of the upper and lower round blades become inappropriate due to the change of various conditions, the shear surface property failure occurs continuously before issuing the trim edge inspection result. Would. (2) Since the trim edge inspection is a sensory inspection seen by human eyes, a large amount of poor shearing surface properties will occur if the quality of the shearing surface properties is inappropriately determined. (3) If all the coils are to be trim-edge inspected, the operating costs increase due to an increase in the number of inspection personnel and a reduction in the efficiency of the shearing line. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a steel plate round blade shearing apparatus capable of constantly shearing a steel sheet with a good shear surface property.

[0007]

The inventor of the present invention has conducted intensive studies in order to solve the above-mentioned problems. As a result, a round blade provided with a pair of round blades for rotating and shearing a steel sheet fed between them. In a shearing device, when a steel sheet is sheared with a good shearing surface property, the shear force is reduced and the vibration of the round blade is also reduced. Was found to be able to be sheared.

Further, it has been found that the vibration of the round blade can be reduced by setting the clearance and the wrap of the pair of round blades to appropriate values according to the time. For example, when the clearance between the pair of round blades and the relationship between the lap and the vibration (shear force) of the round blade are as shown in FIG. 1, the clearance between the pair of round blades is set to 10% of the thickness of the steel plate. The vibration of the round blade can be reduced by setting the wrap between the pair of round blades to 1 mm.

The present invention has been made on the basis of such a viewpoint, and a steel plate fed between them is provided on at least one of a pair of round blades for rotating and shearing, and at least one of the pair of round blades. A vibration sensor for detecting the vibration of the round blade, and control means for controlling the clearance and the lap of the pair of round blades based on the vibration value of the round blade detected by the sensor. This is a steel plate round blade shearing device.

[0010]

According to the steel plate round blade shearing device of the present invention, the steel plate fed between the pair of round blades is sheared while rotating. During the shearing operation, the vibration of the round blade is detected by a vibration sensor provided on at least one of the pair of round blades, and the vibration value of the round blade is determined based on the vibration value of the round blade detected by the sensor. The clearance and the lap between the pair of round blades are controlled by the control means so that the value of the round blade becomes an appropriate value. Thereby, the vibration value of the round blade can be maintained at an appropriate value, and thus the steel plate can always be sheared with a good shearing surface property.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 2 is an explanatory view showing a steel plate round blade shearing apparatus of this embodiment. Reference numeral 1 in the figure denotes a first shearing device main body that shears one end of the fed steel plate B. This first
At a position facing each other across the steel plate B of the shearing device main body 1 of FIG.
A second shearing device main body (not shown), which shears the other end of the steel plate B and has a symmetrical structure with the first shearing device main body 1, is arranged.

A first shearing device main body 1 is disposed above the steel plate B, and has a disk-shaped round blade 2 that shears the steel plate B while rotating along the feed direction of the steel plate B, and a lower portion below the steel plate B. A disk-shaped round blade that is arranged closer to the center of the steel plate B than the round blade 2 and that shears while sandwiching the steel plate B between the round blade 2 while rotating along the feed direction of the steel plate B 3, a rotating shaft 4 having a tip fixed to the center of the round blade 2, a rotating shaft 5 having a tip fixed to the center of the round blade 3, a clearance adjusting mechanism 6, and a lap adjusting mechanism 7. . The pair of round blades 2 and 3 arranged above and below may be rotated by a driving force transmitted through the rotating shafts 4 and 5 or may be rotated by the steel plate B fed between them. It may rotate with the traveling of B. The clearance adjusting mechanism 6 has a motor, and the rotating shaft 4 is moved in the horizontal direction a by the driving force of the motor to adjust the clearance ta which is the horizontal distance between the pair of round blades 2 and 3 shown in FIG. Is what you do.
The lap adjusting mechanism 7 has a motor, and the rotating shaft 4 is moved in the vertical direction b by the driving force of the motor, and the lap t is a vertical overlap of the pair of round blades 2 and 3 shown in FIG.
b is adjusted.

Above the round blade 2 of the first shearing device main body 1, a piano wire vibration sensor 8 is provided. The piano wire vibration sensor 8 includes a piano wire portion 9 that contacts the outer peripheral surface of the round blade 2 and an acceleration sensor portion 10 connected to the piano wire portion 9.

A vibration amplifier 11, which is an amplifier, a band-pass filter 12, a rectifier 13, and an envelope processor 14 are connected in this order at the subsequent stage of the piano wire vibration sensor 8. These vibration amplifier 11, bandpass filter 12,
The rectifier 13 and the envelope processor 14 are for transmitting the vibration value of the round blade 2 detected by the piano wire vibration sensor 8 to an alarm circuit 15 and a personal computer 16 described later as electric signals.

At the subsequent stage of the envelope processor 14, an alarm circuit 1 is provided.
5 and the personal computer 16 are branched and connected. The alarm circuit 15 is connected to a buzzer 17 that sounds an alarm when the vibration value of the round blade 2 is too large.

At the subsequent stage of the personal computer 15, the personal computer 16
Is connected to a system computer 18 which is a higher-level computer. The system computer 18 is connected to the clearance adjustment mechanism 6 and the lap adjustment mechanism 7. The personal computer 16, the system computer 18, the clearance adjusting mechanism 6 and the lap adjusting mechanism 7 adjust the vibration value of the round blade 2 to an appropriate value based on the vibration value of the round blade 2 detected by the piano wire vibration sensor 8. Control means for controlling the clearance ta and the lap tb of the pair of round blades 2 and 3 is configured. Next, the operation of the steel plate round blade shearing device will be described.

The clearance ta and the lap tb of the pair of round blades 2 and 3 are set to appropriate values in advance so that the steel sheet B is sheared with a good shearing surface property. The steel sheet B supplied and fed between the pair of round blades 2 and 3 is rotated and sheared. During the shearing operation, the vibration of the round blade 2 is detected by the piano wire vibration sensor 10, and the detected vibration value of the round blade 2 is converted to a vibration amplifier 1.
1 and the like, and based on this vibration value, for example, as described below, the clearance t of the pair of round blades 2 and 3
a and the lap tb. First, the personal computer 16 determines the vibration value of the round blade 2 as follows.

The shear force (shear resistance) of a steel sheet varies depending on its material. For this reason, the determination of the vibration value of the round blade 2 is roughly divided into three types: a low-carbon material, a low-carbon material, and a high-tensile steel plate.
For each material of these steel sheets, the upper limit of the vibration value of the round blade 2 when the steel sheet is sheared with the best shearing property is set as the first threshold value, and the steel sheet is sheared with almost good shearing property. Is set as the second threshold value. Thereby, the vibration value of the round blade 2 is determined separately for three levels of vibration levels 1 to 3 as shown in Table 1 below.

Table 1 Vibration value level: Vibration value of the round blade 2 detected by the sensor 10 Vibration level 1: Less than the first threshold value. Vibration level 2: greater than or equal to the first threshold and less than the second threshold. Vibration level 3: not less than the second threshold. The determined level of the vibration value of the round blade 2 is sent to the system computer 16 as an electric signal.

The system computer 18 controls the clearance ta and the lap tb of the pair of round blades 2 and 3 according to the level of the vibration value of the round blade 2 determined by the personal computer 16 as shown in Table 2 below. To the clearance adjustment mechanism 6 and the lap adjustment mechanism 7 as electric signals.

Table 2 Levels of vibration values: adjustment contents of clearance ta and lap tb Vibration level 1: current clearance ta and lap tb
To maintain. Vibration level 2: Clearance ta to clearance ta-
(2% of the thickness of the steel sheet B + α). Vibration level 3: Clearance ta is set to clearance ta-
{(2% of thickness of steel plate B + α) × 2} and wrap tb is adjusted to wrap tb− (0.2 mm + α).

The clearance ta and the lap of the pair of round blades 2 and 3 are set such that the vibration value of the round blade 2 becomes the vibration level 1 and 2 based on the vibration value of the round blade 2 detected by the sensor 10 in this manner. Feedback control of tb (automatic control)
I do. Thereby, the vibration value of the round blade 2 is reduced to the vibration levels 1 and 2.
Therefore, the steel sheet B can always be sheared with a good shearing surface property.

[0024]

As described above in detail, according to the present invention, there is provided a steel plate round blade shearing apparatus capable of constantly shearing a steel sheet with a good shearing surface property.

[Brief description of the drawings]

FIG. 1 is a characteristic diagram showing the relationship between the clearance and wrap of a pair of round blades and the vibration and shear force of the round blade.

FIG. 2 is an explanatory view showing a steel plate round blade shearing device of the present embodiment.

FIG. 3 is an explanatory view showing a clearance and a wrap between a pair of round blades.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 1st shearing apparatus main body, 2 ... upper round blade, 3 ... lower round blade, 6 ... clearance adjustment mechanism, 7 ... lap adjustment mechanism, 8 ... piano wire vibration sensor, 16 ... personal computer, 18 ...
System computer, B ... steel plate.

Claims (1)

(57) [Claims] 1. A steel plate round blade shearing device, comprising: a pair of round blades that rotate and shear; a vibration sensor provided on at least one of the pair of round blades for detecting vibration of the round blade; Control means for changing and controlling the clearance and lap of the pair of round blades so that the vibration value is always minimized based on the vibration value of the round blade detected by the sensor. Round blade shearing device.