JPH0518702U - Equipment for cutting both sides of thick steel plate - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the meandering of the steel sheet and improve the cutting accuracy of both edges of the steel sheet. [Structure] In the equipment for cutting both edges of thick steel plate (1),
At least one of the entrance side and exit side table rollers (2, 8) is provided with a pressing roller (21, 22; 81, 82) opposed to the upper side so as to be vertically movable. The body length of the presser roller is made relatively large. The pressing roller is set to non-driving. The outer circumference of the pressing roller is coated with a high friction elastic material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting both edges of a thick steel plate, and more particularly to a device for preventing meandering running of the thick steel plate in the equipment.

[0002]

[Prior Art]

 As shown in FIGS. 1 and 2, the conventional equipment for cutting both edges of a thick steel plate includes a table 2 on the entrance side, a roller 2 on the entrance side, a pinch roll 3 on the entrance side, and a machine for cutting both edges. 4 (Double Side Trimming Shear), an intermediate pinch roll 5, a slitter 6 (Slitter), a delivery pinch roll 7, and a delivery table / roller 8.

By the way, in such a facility, when the steel plate 1 moves while meandering, various irregular trimmings as shown in FIG. 9 occur. In FIG. 9, (A), (B), and (C) are partial plan views of the steel plate 1.

The cause of the meandering of the steel sheet is considered to be as follows.

(1) Slip between steel plate 1 and pinch rolls 3, 5, 7 (2) Speed difference, torque difference, pressing force difference between upper, lower, left and right rolls of each pinch roll 3, 5, 7 Conventional equipment In the above, various methods or devices for preventing the meandering of the steel sheet have been proposed. For example, Japanese Examined Patent Publication No. 60-26644 discloses a method of preventing meandering by controlling the roll pressing force when a speed difference occurs between upper and lower pinch rolls. However, this method is difficult to put into practical use because the meandering state varies depending on the thickness and width of the steel sheet. Japanese Utility Model Laid-Open No. 61-92432 discloses a device in which the pinch rolls provided at each position are all two pairs. However, this device does not provide a basic meandering prevention. Japanese Unexamined Patent Publication No. 54-20479 discloses a device in which two pairs of pinch rolls are provided on the slitter output side. However, even with this device, fundamental prevention of meandering is difficult.

[0006]

[Problems to be solved by the device]

 Even if slip occurs between the steel plate and the pinch rolls, or if there is a speed difference, torque difference, or pressing force difference between the pinch rolls, it is necessary to obtain equipment that can prevent the steel plate from meandering. is there.

[0007]

[Means for Solving the Problems]

 The present invention provides a press plate roller for both sides of a thick steel plate, which is provided with a presser roller which can be driven up and down so as to be opposed to the upper side of at least one of the entrance side and exit side table rollers, and the body length of the presser roller The above problem is solved by means of forming the pressing roller relatively large, setting the pressing roller to be non-driving, and coating the outer circumference of the pressing roller with a high friction elastic material.

The table roller facing the pressing roller may be set to be non-driving.

It is also possible to provide at least one intermediate presser roller having a relatively short body length in the cutting machine in the facility, and the intermediate presser roller may be configured to be substantially the same as the presser roller.

[0010]

[Action]

 In the present invention, the meandering force generated by the pinch rolls arranged at each position is opposed by the pressing force of the presser roller or the intermediate presser roller near each pinch roll to prevent the meandering from occurring. ing.

[0011]

【Example】

 With reference to FIGS. 1-4, an embodiment of the equipment for cutting both edges of thick steel plate of the present invention will be described. Since the schematic configuration of this equipment has been described above, description thereof will be omitted.

In the present invention, pressing rollers 21, 22 and 81, 82 are provided above at least one of the entry side and exit side table rollers 2 and 8 so as to be movable up and down. The body lengths of the press rollers 21, 22, 81, 82 are formed to be relatively large. The press rollers 21, 22, 81, 82 are set to be non-driving. The outer circumferences of the press rollers 21, 22, 81, 82 are covered with a high friction elastic material (not shown).

As the high-friction elastic material, for example, in addition to resin such as rubber and nylon, leather and asbestos are preferable.

As shown in FIG. 3, the pressing rollers 21, 22, 81, 82 can be supported by a fluid pressure cylinder 20 so as to be able to move up and down.

The body length of the pressing roller is preferably 50 to 70% of the maximum plate width of the steel plate 1 to be processed. It is preferable to set the table roller facing the press roller to be non-driving. In this way, by making the upper and lower rollers non-driving, the function of preventing meandering, which will be described later, is further improved.

As shown in FIGS. 1, 2 and 4, at least one intermediate press roller 41, 42 having a relatively short body length is provided in the cutting machine 4 in the equipment, and the intermediate press rollers 41, 42 are pressed by the presser foot. It can be configured almost the same as the roller.

As shown in FIG. 4, the intermediate presser rollers 41 and 42 are supported by a fluid pressure cylinder 40 so as to be movable up and down. A support roller 43 may be provided below the rollers 41 and 42.

The intermediate presser rollers 41 and 42 are used when the steel plate 1 has a relatively short length. The body length of the roller is preferably 70 to 80% of the minimum width of the steel plate.

It is preferable that the outer circumference of the intermediate pressing roller is coated with a high-friction elastic material like the pressing roller.

A mechanism for generating the meander will be devised. As shown in FIG. 5, a case where only one pair of pinch rolls 3 press against the steel plate 1 and the pinch roll 3 acts on the front or rear end of the steel plate 1 will be considered as an example.

As shown in FIG. 5B, when the steel plate 1 is pressed by the pair of pinch rolls 3, as shown in FIG. 5A, points at two points (G, H) The state is close to contact. At this time, if a torque difference occurs (force F ₁ at point G, force F _{2 at} point H), a rotational moment of (F ₂ −F ₁ ) × L occurs at point G, causing the meandering of the steel plate. Is generated (FIG. 6). The same can be considered when slip or speed difference occurs.

When the steel plate 1 is pressed by two pairs of pinch rolls, a relatively small meander occurs. As shown in (A) and (B) of FIG. 7, a moment M _J of (F ₂ −F ₁ ) × L is generated at the point G. However, in this case, since two moments M _G and M _J are generated in one steel plate 1, the steel plate basically does not meander (because there are two supporting points).

However, if the grip force at the support points (G, J) is small, the moment force is lost and the meandering occurs. The relational expression at this time is shown below. However, P _G , P _H , P _J , and P _K indicate the pressing forces at the supporting points G, H, J, and K, respectively. μ is the coefficient of friction.

[0024]

As shown in FIG. 3, when the pressing force of the pressing roller 22 against the steel plate 1 is P on one side, the frictional force is 2Pμ (μ is a friction coefficient).

As shown in FIG. 8, when a moment of magnitude M _G is generated at the point _G , the force F generated at the position of the presser roller 21 is F = MG / l. At this time, if F <2Pμ, the steel plate does not meander. It depends on the magnitude of the pressing force P, the distance l, and the generated moment M, but if the idle presser rollers 21, 22, 81, and 82 of the two input side tables and the two output side tables are installed, the meandering will occur. It can be prevented almost completely.

As shown in FIG. 3, a long object is prevented from meandering by the idle pressing roller 21 described above. In the case of a short product, meandering is prevented by the intermediate pressing rollers 41 and 42 as shown in FIG. This is effective when the steel plate 1 is conveyed only by the pinch roll 5 on the output side of the DSTS 4. The intermediate pressing rollers 41 and 42 are movable together with the support roll 43, and are always at the intermediate position between the reference side and the moving side.

[0028]

[Effect of the device]

 According to the present invention, the meandering of the steel sheet can be completely prevented, the precision of cutting both edges of the steel sheet is improved, maintenance work is unnecessary, and the yield and productivity can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a schematic configuration of a double-sided ear cutting facility for a thick steel plate according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view seen from the line III-III in FIG.

FIG. 4 is a front view seen from the line IV-IV in FIG.

FIG. 5 is an operation explanatory view of a conventional pinch roll,
(A) is a plan view and (B) is a side view.

6 is a partially enlarged view of FIG. 5 (A).

FIG. 7 is an explanatory diagram of the cause of meandering in the conventional equipment, in which (A) shows the imbalance of the conveying force of the pinch rolls.
Figure (B) shows the resulting moment imbalance.

FIG. 8 is an explanatory view of a meandering preventive action according to the present invention.

FIG. 9 is a partial plan view of a thick steel plate after cutting both ears by conventional equipment.

[Explanation of symbols]

 1 thick steel plate 2,8 table roller 4 both-sides edge cutting machine 3,5,7 pinch roll 21,22,81,82 presser roller 41,42 intermediate presser roller 20,40 fluid pressure cylinder

Claims (1)

[Scope of utility model registration request] 1. In a double-sided edge cutting facility for thick steel plates, a pressing roller is provided so as to be vertically movable so as to oppose at least one of an input side table and an output side table roller. An apparatus for cutting both edges of thick steel plates, characterized in that the pressing roller is set to be non-driving, and the outer circumference of the pressing roller is covered with a high friction elastic material.