JPH0220618A - Roller leveler - Google Patents

Abstract

PURPOSE:To prevent bending damages of work rollers and burr of the front end of the stock by disposing plural backup rollers backward work rollers arranged zigzag upward and downward, reducing the diameter of several ones on the central part to expand fixing positions and magnifying the embracing angle. CONSTITUTION:The straightening load is received by the large diameter backup rollers 4 through the work rollers 2, the lateral load is received by the small diameter backup rollers 5 embracing the work rollers 2 widely to prevent that the work rollers 2 are not to be pushed out of the outlet side, even if the front end of the stock thrusts into the drums of the work rollers. Further, when a large rolling reduction is loaded by miss rolling reduction, etc., its lateral load is received by a stopper 6 set up between the work rollers 2 to prevent the moving of the work rollers 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a roller leveler that corrects the shape of a plate.
In particular, it relates to a roller leveler that is suitable for wide and small diameter rollers on a cutting line that threads sheets under pressure on the cutting line.

[Conventional technology]

Regarding the roller leveler of the present invention, Japanese Patent Application Laid-Open No. 54-2986
This method is disclosed in Publication No. 7 and Japanese Utility Model Application No. 61-41416.

However, with regard to small-diameter rollers for wide and thin sheets, no consideration has been given to passing the sheets under rolling pressure.

[Problem to be solved by the invention]

This conventional technology does not take into consideration the tip threading of thin sheets of material that require a large amount of reduction in the leveler specifications, and when the material is straightened under strong reduction, the tip of the material may be damaged by the work roll. If the work roller hits the body of the material and pushes the work roller to the exit side, causing bending damage to the work roller, or even if the work roller is not bent, if the work roller is pushed out by the tip of the material, the work roller will support it. There were problems such as rolling on a back-up roller that was holding the material and applying a reduction greater than the set reduction amount, causing a phenomenon in which the leading edge of the material was bent and the product was ruined.

The present invention prevents the leading edge of the material from pushing into the body of the work roller and shifting the work roller from its original backup roller holding position even when the material is passed through with the tip pressed down.
The purpose is to prevent bending of the work roller and curling of the tip of the material.

[Means to solve the problem]

This purpose can be achieved by increasing the embrace angle of the backup roller that embraces the work roller, causing the work roller to sink greatly into the banked up roller, but if the embrace angle of this backup roller is simply increased, the Since the backup rollers interfere with each other, their diameters have to be made smaller. This is not possible due to the capacity to receive the straightening load. In other words, it can be classified into two types: backup rollers that receive the straightening load and backup rollers that hold the work roller, or by forcibly stopping the work roller from jumping over the backup roller. You can achieve your purpose.

[Effect]

The large-diameter backup roller of the two types of backup rollers receives the straightening load necessary to straighten the material via the work roller, and the small-diameter backup roller largely embraces the work roller so that the tip of the material is on the work roller. To receive a lateral load so that a work roller is not pushed out to the exit side even if it plunges into the body. Furthermore, if a larger reduction is applied due to an error in reduction, a larger lateral load will be applied, but the stopper installed between the work rollers will receive this lateral load, so the work roller will always move away from the specified position. There is no movement, the work roller can be prevented from jumping out, and problems such as the backup roller running over and increasing the actual rolling reduction amount can be eliminated.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 3.

Figure 3 shows a conventional leveler, in which there are five upper work rollers and four lower work rollers, and when the material 1 passes between these work rollers 2, it is given a counter-bending force. The backup roller 3 receives this correction load. Normally, this straightening load is very large, so to prevent the work roller 2 from deflecting, the backup roller 3 is made large in diameter as long as it does not interfere with the backup roller 3 for the adjacent work roller 3, and is divided in the surface length direction of the work roller 2. It is.

On the contrary, since the backup roller 3 is made as large as possible, the embrace angle β of the backup roller 3 becomes small as shown in FIG. 1, and the work roller 2 can hardly be reinforced in the lateral direction. As shown in FIG. 1, a small-diameter backup roller 5 is partially installed in the work roller surface length direction with respect to the large-diameter backup roller 4 at a position where the largest possible embrace angle β' is given to the work roller 2.

Furthermore, as shown in FIG.
Therefore, a stopper 6 is installed between the work rollers 2.

The stoppers 6, like the small-diameter backup roller 5, are installed at several locations in the longitudinal direction of the work roller 2.

According to this embodiment, the small-diameter backup roller 5 allows the work roller 2 to be held at a large angle, and the use of the stopper prevents the work roller 2 from deflecting in the path flow direction, thereby increasing the lateral rigidity of the work roller 2. It can be uploaded.

〔Effect of the invention〕

According to the present invention, even when a thin plate material is passed under strong pressure, the work roller remains stable even if the tip of the material hits the body of the work roller. By moving on the backup roller, even stronger pressure is applied without damaging the leading edge of the material.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the arrangement of backup rollers according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the configuration of a stopper installed between work rollers of the present invention, and Fig. 3 is an explanatory diagram of a conventional roller leveler. 61...Material, 2...Work roller, 3...Backup roller, 4...Large diameter backup roller, 5...Small diameter backup roller, 6
...stopper, 7...backup bearing. (α) α→

Claims (1)

[Claims] 1. It has several work rollers arranged in a staggered manner above and below, and a plurality of backup rollers are installed alternately behind the work rollers to prevent deflection, and the backup rollers are arranged in a staggered manner. A roller leveler characterized in that several central portions of the back-up roller have diameters smaller than the other backup rollers, their mounting positions are wider than the other backup rollers, and the embrace angle between the work roller and the backup roller is larger than the other portions. 2. According to claim 1, a stopper fixed to the backup roller is provided between the work rollers, and a slight gap is provided between the work roller and the stopper. Laura Leveler.