JPH07299714A - Edge grinding machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a device for removing the turning of the edge portion of the steel plate after side trimming of the thin plate. [Structure] A steel plate edge grinding device including a holding mechanism that tilts a grindstone, a tilt angle adjusting mechanism, and a mechanism that periodically slides in the grindstone direction, and a coil spring that generates a grindstone rolling force in the steel plate edge direction. A steel plate edge grinding device that incorporates a grinding wheel holding mechanism that can be adjusted to the rolling force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an edge grinding device for removing edge turning of a strip steel plate edge portion after side trimming in a thin steel plate adjusting line.

[0002]

2. Description of the Related Art For removing the blade edge of the edge portion after side trimming by grinding, for example, as shown in Japanese Patent Application Laid-Open No. 3-294162, the forward force of the plate itself is used to incline the plate surface. In addition, there is known one that grinds and removes the edge portion with a fixed grindstone, and as a cutting removal, there is known a device that cuts and removes the edge portion from a fixed cutting tool installed with respect to the steel plate edge portion.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the method (apparatus) disclosed in Japanese Patent Laid-Open No. 2 publication, the movement of the steel plate is suppressed by the fixed grindstone, and therefore, the difference in the plate thickness and the plate shape causes a grinding failure due to the fluctuation of the contact angle between the steel plate edge and the grindstone and the contact pressure. When grinding is insufficient, trimming primary return (blade return)
However, there is a problem that when the grinding is excessively performed, a secondary return occurs due to the grindstone, and the pieces of the return fall off in the next step, resulting in a flaw in the steel sheet. Further, in the case of cutting, since it is a fixed tool, the load is concentrated on a part of the tool and seizure occurs, resulting in a short tool life.

The present invention solves the above problems, and an object of the present invention is to provide an edge grinding apparatus capable of easily and efficiently removing the turning of the edge portion of the steel plate after side trimming of the thin plate.

[0005]

Means for Solving the Problems The gist of the present invention is as follows: (1) In a device for removing a blade edge of an edge portion after side trimming of a steel sheet that is continuously threaded, a holding mechanism in which a grindstone is inclined and an inclination angle thereof. A steel plate edge grinding device comprising an adjusting mechanism and a mechanism for periodically sliding in the direction of the grindstone. (2) In the steel plate edge grinding device as described in the above item (1), a coil spring that generates a grinding stone pressing force in the steel plate edge direction is incorporated, and a grinding stone holding mechanism that can adjust the pressing force is used. At this time, the inclination angle is 10
It is desirable to be able to adjust in the range of 30 ° to 30 °, and it is effective for removing the blade turning that the rolling force of the grindstone can be adjusted in the range of 0.5 kg to 2 kg.

[0006]

OPERATIONS AND EXAMPLES FIGS. 1A and 1B are front and side views illustrating the present invention. The grindstone 1 is held and fixed to the grindstone base 2 and the coil spring 3 supporting the grindstone base 2
The compression of the book generates a rolling force necessary for grinding, and the expansion and contraction absorbs the fluctuation of the steel plate 9.

The shift frame 4, to which the coil spring 3 is fixed, periodically slides through the link 6 by the rotation of the shift motor 5 to enhance the grinding effect and extend the life of the grindstone by using it on the entire surface of the grindstone.

Shift frame 4 and shift motor 5
The pedestal 7 on which is mounted can be adjusted to an optimum grinding angle with the other end as a fulcrum by an angle adjusting bolt 8 provided on one end side. 10 in the figure
Is an upper pressing roll, 11 is a lower pressing roll, 12 is a pressing roll elevating cylinder, 13 is a grinding dust removing device, and 14 is a whetstone mounting screw.

An example of removing the edge turning of the steel plate edge portion according to the present invention will be described below. The basic configuration of this device is shown in Fig. 1.
Similar to (A) and (B), the rolling force of the coil spring 3 is 0.5 kg to 2 kg, the grinding wheel grinding angle (angle with respect to the horizontal plane) is 10 ° to 30 °, and the shift (sliding) speed of the grinding stone 1 is 10 mm.
It can be adjusted within the range of / sec to 30 mm / sec. This time, the initial rolling force of the coil spring was 1 kg, the grinding wheel grinding angle was 20 °, and the grinding wheel shift (sliding) speed was 20 mm / sec.

FIG. 2 shows grindstone grinding angles of 10 °, 15 °, 20
The return height after grinding at 25 °, 25 °, 30 °, line speed 50 mpm, no whetstone sliding, plate thickness 0.4 mm, 0.
The results are measured under the conditions of 8 mm, 1.2 mm and initial rolling force of 1 kg. The thinning material (sheet thickness 0.4 mm) has a cutting angle of 25 °, while the thick material (sheet thickness 1.2 mm) has a cutting angle of around 15 °, which is the lowest return height. This is because in thin materials, the plate itself bends due to the pressing force from the side of the grinding machine, the contact angle between the plate and the grindstone becomes small, and a large grinding angle is apparently required.
It is also considered that the thick material has a high plate rigidity and thus the plate itself has a small curvature and is not affected by the contact angle.

FIG. 3 shows initial rolling forces of 0.5, 1.0, 1.
The return height after grinding at 5, 2.0 kg is line speed 50 mpm, no whetstone sliding, plate thickness 0.4 mm, 0.8 mm,
The results are measured under the conditions of 1.2 mm and a grinding wheel grinding angle of 20 °. When the plate thickness is 0.8 mm or 1.2 mm, the return height decreases when the reduction force is increased, and when the plate thickness is 0.4 mm, the return amount increases when the reduction force exceeds 1.5 kg. It is considered that the thin material, which has low rigidity, bends under high pressure and the contact angle changes, and secondary return occurs.

FIG. 4 shows the whetstone sliding speed of 10, 20, 30 mm / s.
Return speed after grinding at ec is line speed 30, 4
The results are measured under the conditions of 0,50 mpm, a plate thickness of 0.8 mm, and a grindstone grinding angle of 20 °. Line speed high speed range (80
At m / min), the higher the grinding wheel sliding speed, the lower the return, and in the low line speed range (30 m / min), the grinding wheel sliding speed is too fast (20 mm / sec), and the return is high. This is because the higher the sliding speed of the grindstone is, the higher the grinding ability is, but it is considered that when a part of the steel plate is ground too much, a secondary return occurs and the grinding effect is reduced.

[0013]

As described above, according to the present invention, it is possible to easily remove the blade turning back without installing expensive side trimming equipment which is devised so as not to cause the blade turning back. In addition, since the blade turning can be removed, the allowable range of the shape of the cut surface of the steel plate by the trimmer is expanded, the blade replacement interval of the side trimmer is extended, the line down time required for blade replacement can be reduced, and the grindstone life is increased. It has a remarkable effect that it significantly extends and the purchase cost of the grindstone can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the apparatus of the present invention (A).
And a side view (B) thereof.

FIG. 2 is a diagram showing a relationship between a grinding angle and a return height when a steel plate edge portion is ground according to the present invention.

FIG. 3 is a diagram showing a relationship between pressure and return height when a steel plate edge portion is ground according to the present invention.

FIG. 4 is a diagram showing a relationship between a sliding speed and a return height when a steel plate edge portion is ground according to the present invention.

[Explanation of symbols]

 1 Grindstone 2 Grindstone base 3 Coil spring 4 Shift frame 5 Shift motor 6 Link 7 Pedestal 8 Angle adjustment bolt 10 Upper holding roll 11 Lower holding roll 12 Lifting cylinder

Claims (2)

[Claims] 1. An edge grinding apparatus for removing edge turning of an edge portion after side trimming of a steel sheet which is continuously threaded, a holding mechanism in which a grindstone is inclined, its inclination angle adjusting mechanism, and a grindstone direction. A steel plate edge grinding device consisting of a mechanism that slides periodically. 2. The steel plate edge grinding apparatus according to claim 1, wherein a coil spring that generates a grinding stone pressing force in the steel plate edge direction is incorporated, and a grinding stone holding mechanism that can adjust the pressing force is used.