JPH06114721A - Flaw repairing device provided with variable contact roll - Google Patents

Abstract

PURPOSE:To improve the grinding efficiency by providing a plurality of contact rolls, properly used in accordance with a flaw condition of a steel plate, in an endless grinding belt so that the grinding belt is moved to be pressed from the inside. CONSTITUTION:An endless grinding belt l is linked to pulleys arranged in the right and left, to enable the belt to run endlessly by driving the pulley rotated. A head frame unit 3 is mounted on guide rails 22a, 22b, fixedly provided in a common frame unit 21, through guide bearings 23a, 23b. The head frame unit 3 can be transversely moved by a drive shaft 24 and a bearing nut 25. A cylinder 2 is mounted on the head frame unit 3, and a head main unit 5 is provided in a rod point end of this cylinder, to mount contact rolls 7, 10, 16 on the head main unit 5. The head main unit 5 is vertically moved by the cylinder 2, and the contact rolls 10, 16 are advanced/retracted by press attaching cylinders 13, 19, to selectively press each contact roll 7, 10, 16 to the grinding belt 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flaw care device equipped with a variable contact roll for efficiently treating a partial flaw of a steel plate, particularly a thick steel plate.

[0002]

2. Description of the Related Art Conventionally, the defects of thick steel plates are often generated during the rolling process or during transportation, and there are many types such as ridge defects, beards, and crop defects. Is roughly divided into partial maintenance work. Among them, it is usual to introduce a full-scale grinder on the premise of offline for the full-scale maintenance work, but for the partial maintenance work, the partial flaws scattered online are highly efficient, and in addition, chattering, stepping, baking on the quality. Since it requires untidy maintenance, it currently relies on manual work using a wagon grinder tool. For the maintenance with this wagon grinder tool, the device shown in Japanese Utility Model Laid-Open No. 61-75953 and Japanese Utility Model Laid-Open No. 62-104856 can be used. This is a work that requires a great deal of skill because it affects the quality of the work.

Further, although an automatic maintenance machine has a grinding device using a cylindrical grindstone, the cylindrical grindstone has a difficult controllable surface near the start and end of flaw scratches, and the partial flaws scattered in the central portion of the steel plate. Not suitable for grinding. Further, JP-A-58-156
As to a maintenance device in which a grinding roll is provided in an endless grinding belt as shown in Japanese Patent Laid-Open No. 63-63, when a grinding roll is brought into contact with a steel plate, surface contact grinding is performed, resulting in localized recesses, steps, etc. It is advantageous and effective for partial care. However, in belt grinding, the grinding depth per time is as small as about ten and several microns, and the life of the belt is short, so the belt must be frequently replaced.

[0004]

As described above, in the case of the maintenance device in which the grinding roll is provided in the endless grinding belt as in the conventional Japanese Unexamined Patent Publication No. 58-15663, the belt grinding is not performed. The grinding depth per operation is small, the life of the belt is short, and the belt must be frequently replaced, which is problematic in terms of work and cost. Also, since the diameter and width of the grinding roll are usually constant,
Even if the maintenance width is narrow, the roll diameter is constant, and therefore the grinding must be performed widely, which results in a large grinding load and poor grinding efficiency.
In order to solve such a problem, the present invention aims to provide a flaw care device which is provided with a plurality of contact rolls and can be selectively used for rough cutting and finish cutting, and which has improved maintenance grinding efficiency.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to advantageously achieve the above object, and the gist of the invention is to provide an endless grinding belt in a device for caring for flaws in a steel sheet. And a plurality of contact rolls for pushing the inside of the grinding belt are provided, and a contact roll that can be selectively used according to the flaw condition of the steel plate is provided. It is in the defect care device provided.

[0006]

OPERATION AND EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall schematic view of a variable contact roll according to the present invention. As shown in FIG. 1, the endless grinding belt 1 is rotatably stretched by pulleys (not shown) fixed to rollers arranged on the left and right. This one-sided pulley is connected to a driving motor, and the grinding belt 1 stretched around the roller is rotated by driving the driving motor. Reference numerals 2 and 13 and crimping cylinders, 3 head frame, 5 head body, 6 and 9 roller frame, 7 and 10 contact rolls, 8 and 11 shafts, 12 and 14 brackets,
21 is a common frame, 22a and 22b are guide rails, 23
a and 23b are guide bearings, 24 is a drive shaft,
25 is a bearing nut, 26 is a motor, and 27 is a coupling.

Based on these configurations, the guide rails 22a and 22b are fixedly mounted on the common frame body 21, and the guide bearings 23a and 23b are provided on the head frame body 3 by being fitted into the guide rails 22a and 22b. . Drive shaft 24
Is inserted into a bearing nut 25 provided on the head frame body 3 and connected to a motor 26 via a coupling 27. Then, the contact roll pushes the grinding belt 1 by rotating the motor 26 forward and backward.

FIG. 2 is an explanatory view of the contact roll according to the present invention. FIG. 2B is a contact roll arrangement view taken along the line AA. The cylinder 2 is fixed to the upper part of the head frame 3 and the tip of the lot is connected to the head body 5.
The guide rails 4a and 4b are fixed to the head frame body 3, and the guide rails 4a and 4b have guide bearings 2
3a and 23b are inserted. The guide bearings 23a and 23b are fixed to the back of the head body 5. Therefore, the head body 5 is configured to be movable up and down along the guide rails 4a and 4b. Reference numeral 15 is a roller frame,
16 is a contact roll, 17 is a shaft, 18 and 20 are brackets, and 19 is a crimping cylinder.

FIG. 3 is a schematic illustration of grinding according to the present invention. FIG. 3 (A) is a diagram showing a pressure bonding operation of the contact roll 7, and an operating mechanism in the case of using the contact roll 7 in the case of rough grinding, that is, heavy grinding, depending on the condition of the flaw on the thick steel plate, First, the crimping cylinders 13 and 19 are contracted, and the contact rolls 10 and 16 are retracted. Then, the crimping cylinder 2 is operated and the head body 5
The contact roll 7 presses against the grinding belt 1 by lowering. In this way, rough grinding is performed using the contact roll 7.

FIG. 3B is a diagram showing the pressure bonding operation of the contact roll 10. In the case of the contact roll 10, when the contact roll has a large diameter and is used for finish grinding, the crimp cylinder 19 is contracted, the contact roll 16 is retracted, and then the crimp cylinder 2 is operated.
The head body 3 is lowered, and then the pressure bonding cylinder 13
Is operated to lower the contact roll 10 and press the grinding belt 1. As a result, when so-called light grinding and the maintenance width is narrow, the effect can be obtained by using this method.

FIG. 3C shows the contact rolls 10 and 1.
It is a figure which shows the pressure bonding operation of 6. This is used when grinding the contact rolls 10 and 16 while pushing them simultaneously, and adds the following operation to the pressure bonding operation of the contact roll 10. That is, the pressure bonding cylinder 19 is operated to lower the contact roll 16 and press the grinding belt 1. As a result, the effect can be obtained by using this method in the case of light grinding and wide maintenance.

By arranging a plurality of contact rolls in this way, for example, a large diameter roll and a small diameter contact roll are arranged, a small diameter roll is used for rough grinding, and a large diameter roll is used for finish grinding. It becomes possible to perform finish grinding after grinding, and the contact rolls can be divided in the longitudinal direction and used according to the maintenance width.If the maintenance range is small, use a narrow contact roll. By using a wide contact roll, the one with a large value could be extremely improved in the care effect.

[0013]

As described above, according to the present invention, rough grinding and finish grinding are selectively used, and when the maintenance range is small depending on the size of the maintenance range, a narrow contact roll is used to reduce the grinding load. In addition, when the maintenance range is large, a wide contact roll is used to improve the maintenance grinding effect, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a variable contact roll according to the present invention.

FIG. 2 is an explanatory view of a contact roll according to the present invention.

FIG. 3 is a schematic explanatory view of grinding according to the present invention.

[Explanation of symbols]

 1 Grinding Belt 2, 13, 19 Crimping Cylinder 3 Head Frame 4a, 4b Guide Rail 5 Head Main Body 6, 9, 15 Roller Frame 7, 7, 16 Contact Rolls 8, 11, 17 Shafts 12, 14, 18, 20 bracket 21 common frame 22a, 22b guide rails 23a, 23b guide bearing 24 drive shaft 25 bearing nut 26 motor 27 coupling

Front Page Continuation (72) Inventor Hiroshi Fukuchi 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd. Technology Development Division

Claims (1)

[Claims] 1. An apparatus for caring for flaws in a steel sheet, wherein an endless grinding belt is stretched, and a plurality of contact rolls for pushing inside the grinding belt are provided, which are used properly according to the flaw condition of the steel sheet. Scratch care device equipped with a variable contact roll characterized by arranging