JPH0890399A - Shear burr removing device of thick steel plate - Google Patents

Abstract

PURPOSE: To appropriately and correctly remove the shear burr of a constantly advancing thick steel plate by pushing up a grinding wheel through an oscillating arm and a grinding wheel elevating shaft when a base frame is elevated and a guide roller is pushed down by the steel plate. CONSTITUTION: A grinding wheel 4 is arranged so as to be positioned under the passing position of the shear bun at the edge of a steel plate 1 to be transferred after the shearing, and when the slab 1 passes above the grinding wheel, a base frame 13 is elevated to make a pair of forward and rear guide rollers 7, 7a abutted on the lower surface of the advancing slab 1 and pushed down. At the same time, the grinding wheel 4 at the upper end of a grinding wheel elevating shaft 6b is pushed up to the prescribed position regulated by the guide rollers 7, 7a through forward and rear oscillating arms 9, 9a supported in a sea-saw manner at an intermediate part by arm supporting members 12, 12a, and the shear burr at the edge of the advancing steel plate 1 is ground and removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shear return removing device for thick steel plates.

[0002]

2. Description of the Related Art A thick steel plate is sheared by a shearing device such as a round blade or a down-cut shear in order to finish the width and length to a standard size. The shearing device generally performs shearing by adjusting the clearance of the blade according to the thickness of the steel plate and the elapsed time of use of the blade. Then, during this shearing, as shown in FIG. 4, various shear shears 3 of various sizes are likely to be extruded by the shearing blade in the lower end width direction of the shear plane 2 of the steel sheet 1. There was a problem of impairing the quality of thick plate products such as scratching the lower steel plate when attaching or stacking the steel plates. As one of such shear return removing devices, there is a method of pressing the generated return while pressing it with a roller, but depending on the size of the generated return, the crush degree becomes uneven and accurate removal is difficult. It was In addition, the actual exploitation number 49-145294 or the actual exploitation number 56-
As disclosed in Japanese Patent No. 24549, there is also known a method of removing flaws on a slab and removing slag after gas cutting by grinding with a grindstone.

[0003]

However, in the above grinding removal, since the sheared surface of the steel plate is always ground with a constant pressing force regardless of the presence or absence of shear return, the portion with little return is over-grinded. There is a concern that it will be deeply cut. Further, there is a problem that it becomes difficult to remove accurately due to a diameter change due to abrasion of the grindstone. The present invention has been made in order to advantageously solve such a problem, and an object of the present invention is to provide an apparatus that grinds and removes just enough depending on the size of the return.

[0004]

A shear return removing device for a thick steel plate according to the present invention, which has solved the above-mentioned problems, has a pair of front and rear arm supporting members provided on the upper surface of a vertically movable base frame. Each of the swing arm is supported by a lever support member in a seesaw shape, and its inner ends are pivotally connected to each other, and a guide roller is attached to the outer ends of both swing arms via roller lift shafts. , A grinding wheel for removing shear return is attached to the connecting point of the inner ends of both swinging arms on the outer side of the line connecting both guide rollers via the grinding wheel lifting shaft, and the base frame is raised and the guide roller is pushed down by the steel plate. The grinding wheel is pushed up by the rocking arm and the grinding wheel lifting shaft when it is moved.

[0005]

In such a shear return removing device, the grinding wheel is arranged directly below the sheared thick steel plate conveying table so that the grinding wheel is located below the shear return of the steel plate and the guide roller is located inside thereof. If the base frame is raised when the thick steel plate after shearing is conveyed above it, the front and rear guide rollers abut against the lower surface of the advancing steel plate and are pushed down. Both swinging arms, which are supported like a seesaw, have their outer ends lowered via the roller elevating shaft and the connecting point at the inner end rises, so this connecting point located outside the line connecting both guide rollers The grinding wheel at the upper end of the grindstone lifting shaft whose lower end is attached to the wheel is pushed up to a predetermined position regulated by both guide rollers, and the shearing of the advancing edge of the steel plate is ground and removed. In other words, the grinding wheel responds to the shearing arm of the guide roller by the reaction force of the steel plate contact, and the shearing force of the grinding wheel is properly adjusted by pressing the shearing wheel against the shearing force. Even when the diameter of the grindstone changes due to wear or the like, an appropriate pressing force is maintained, and the shear return can be accurately ground without excess or deficiency.

[0006]

The present invention will now be described in detail with reference to the illustrated embodiments. In the figure, 4 is a grindstone wheel that is rotatably supported by a bearing portion at the upper end of a grindstone lifting shaft 6b and is rotatable by a motor 5, and 7 and 7a are roller lifting shafts 6 different from each other.
Reference numeral 8 denotes a pair of front and rear guide rollers that are rotatably supported by bearings at the upper end of 6a, and 8 is an elevating guide frame. The elevating guide frame 8 is provided with front and rear guide portions at the front and rear positions of its middle portion, through which the roller elevating shafts 6 and 6a described above are inserted and guided, and the roller elevating shafts 6 and 6a are located outside this position. A guide portion similar to the above is provided at an intermediate position of the above, and the grindstone elevating shaft 6b is inserted therethrough, and the roller elevating shafts 6 and 6a and the grindstone elevating shaft 6b are vertically moved under the guide of the elevating guide frame 8. There is something that can be done.

Reference numerals 9 and 9a denote a pair of front and rear swing arms. Both swing arms 9 and 9a are main arm portions extending in the front-rear direction and a sub arm portion inwardly connected to each other. The arms 9 and 9a are supported in a seesaw shape by connecting the intermediate portions of the main arm portions to a pair of front and rear arm support members 12 and 12a arranged on the upper surface of the base frame 13 by shafts 11b and 11c. In addition, each swing arm 9, 9
Slots 10 and 10a are formed at the outer end of the main arm portion of a, and the lower ends of the roller elevating shafts 6 and 6a are intervened in the slots to be pivotally connected by shafts 11 and 11a. Further, the tip ends of the sub-arm portions of the two swing arms 9, 9a located outside the line connecting the guide rollers 7, 7a are fitted in the long groove 10b formed at the tip of one sub-arm portion. The tip of the other sub-arm portion is intervened and connected by a shaft 11b. The guide frame 8 is also fixed to the base frame 13. When the base frame 13 is raised and the guide rollers 7, 7a are pushed down by the steel plate, the swing arms 9, 9a and the grindstone lifting shaft 6b are moved. The grinding wheel 4 is pushed up via the wheel.

In the drawing, 14 is a base frame 1.
3 is a lifting mechanism of the base frame 1 in this embodiment.
6 has the lower end pivotally supported, and the upper end has the base frame 1
It is assumed that the fluid pressure cylinder 15 is composed of frame members 14a and 14b pivotally supported by 3 and a fluid pressure cylinder 15 whose lower end is pivotally supported by the base frame 16 and whose piston rod top end is connected to one frame member 14a. Pressure cylinder 1
The base frame 13 is moved up and down through the two frame members 14a and 14b by the operation of FIG.

In such a structure, the grinding wheel 4 is arranged below the position where the shear return 3 at the edge of the steel plate 1 conveyed after shearing passes, and the steel plate 1 passes above it. At this time, the fluid cylinder 15 is operated to raise the base frame 13 to press the pair of front and rear guide rollers 7, 7a against the lower surface of the steel plate 1 and the motor 5
Is rotated in the direction opposite to the traveling direction of the steel plate 1, the front and rear guide rollers 7, 7a abut against the lower surface of the traveling steel plate 1 and are pushed down, and at the same time, the arm supporting members 12, 12
The front and rear swing arms 9 and 9a, which are supported in a seesaw shape with an intermediate portion on a, have outer ends of the roller lift shaft 6,
Since it descends via 6a and the connecting point at the inner end rises at the same time, the whetstone lifting shaft 6 with the lower end attached to this connecting point located outside the line connecting both guide rollers 7, 7a
The grinding wheel 4 at the upper end of b is pushed up to a predetermined position regulated by both guide rollers 7 and 7a, and the shear return 3 at the edge of the steel plate 1 which is moving forward is ground and removed. That is,
The reaction force of the guide rollers 7, 7a causes the arm support members 12, 12
It is transmitted to the grinding wheel 4 at the upper end of the grindstone lifting shaft 6 through the rocking frames 9 and 9a which swing vertically with a as a fulcrum, and at this time, the traveling direction of the steel plate 1 is balanced by the lever ratio of the rocking frames 9 and 9a. The grinding wheel 4 that rotates in the opposite direction constantly contacts the shear return 3 on the lower surface of the edge of the steel plate 1 and grinds and removes the shear return 3 without excess or deficiency.

Further, the guide rollers 7 and 7a and the grinding wheel 4 are attached to the rocking arms 7 and 7a which are vertically rocked like a seesaw through the roller lifting shafts 6 and 6a and the grinding wheel lifting shaft 6b. Nevertheless, since the roller elevating shafts 6 and 6a and the grindstone elevating shaft 6b are both guided by the elevating guide frame 8 provided above the elevating frame 13, vertical elevating movement can be ensured.

[0011]

As described above, according to the present invention, when the base frame is lifted and the guide roller is pushed down by the steel plate, the grinding wheel is pushed up through the swing arm and the grinding wheel lifting shaft. It is possible to accurately remove the progressing shear return of thick steel plate without excess or deficiency, and it is possible to reliably prevent the conveying roller from being scratched by the remaining shear return or the stacked steel plates from being scratched. In addition, it is possible to prevent quality deterioration due to excessive grinding, improve the quality of the thick steel plate, and further improve the yield. Therefore, the present invention contributes to the industry as a shear return removing device for a thick plate steel plate, which solves the problem in removing the shear return of the conventional thick plate steel plate, and is extremely large.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention.

FIG. 2 is a front view showing an embodiment of the device of the present invention.

FIG. 3 is a plan view of a swing arm.

FIG. 4 is a perspective view showing shear return of a thick steel plate.

[Explanation of symbols]

 4 Grinding wheel 6 Roller lifting shaft 6a Roller lifting shaft 6b Grinding wheel lifting shaft 7 Guide roller 7a Guide roller 8 Lifting guide frame 9 Swing frame 9a Swing frame 12 Arm support member 12a Arm support member 13 Base frame

Claims (2)

[Claims] 1. A pair of front and rear arm supporting members are provided on the upper surface of a vertically movable base frame, and each of the swinging arms is supported by the arm supporting members in a seesaw shape to pivot their inner ends. While freely connecting the guide rollers to the outer ends of both swing arms via the roller lift shafts, the grindstone lift shaft is placed at the connection point of the inner ends of both swing arms outside the line connecting the guide rollers. By attaching a grinding wheel for removing shear return, when the base frame is raised and the guide roller is pushed down by the steel plate, the grinding wheel is pushed up via the swing arm and the grinding wheel lifting shaft. Plate Shear removal device for steel plate. 2. The shear return removing device for a thick steel plate according to claim 1, wherein the roller elevating shaft and the grindstone elevating shaft are guided by an elevating guide frame provided above the elevating frame.