JPS6021138A - Method and device for producing rolled ring - Google Patents

Abstract

PURPOSE:To progress smoothly bending formation and to obtain easily a ring having a desired diameter by inclining a driven shaft roll by a prescribed angle with respect to a main shaft roll and subjecting the wall thickness from the root part to the end part in the collar part of an angle steel strip to skew rolling. CONSTITUTION:A driven shaft roll 17 which is pressed to a main shaft roll 12 fixed by a main shaft 11 provided to a base plate 10 and is given an angle theta with respect to the plane of the roll 12 is provided to a driven shaft 16. The shaft 16 is fixed via a self-aligning bearing 20. The shaft 11 and the shaft 16 are meshed with each other by driving gears 21-1, 21-2, by which the roll 12 and the roll 17 are pressed to a pressing roll 19. An angle steel strip 1 is introduced between said rolls 12 and 17 and the wall thickness from the root part to the end part in the inside direction of the L shape is subjected to skew rolling while said thickness is decreased in accordance with the angle theta. The other side of the L shape is then pressed by the roll 19, by which the ring having a prescribed diameter is successively formed.

Description

[Detailed description of the invention] The present invention relates to a method and apparatus for manufacturing a rolled ring.

For example, when a copper strip is wound into a coil and transported, rings are used to be inserted into both end faces of the coil to protect the inner diameter of the coil.

FIG. 1 is a partial schematic diagram of a ring. Usually, a round cold-rolled steel strip is formed into a ring shape using a bender, or a so-called spatula drawing method is used. However, according to the single bender method, bending of the ring end 3 did not go well, and when the width L2 of the flange 2 exceeded 20 mm, the flange 2 became difficult to form, and cracks occurred in the flange 2.

The present inventors proposed that when giving an L-shaped steel strip a wall thickness that is inclined in the width direction of the rib 2, the end portion is subjected to a large reduction and rolled at an inclination in the longitudinal direction of the copper strip. Accordingly, it has been found that the L-shaped steel strip is formed into a ring shape.

The present invention was completed as a result of various studies based on such knowledge, and the gist of the first invention is to
The shaped steel strip is introduced into a rolling roll having an angle θ, and the entire wall thickness from the base to the end in the width direction of the L shape is reduced while being inclined and rolled in accordance with the angle θ. It is characterized in that it is sequentially formed into a ring shape by pressing with a pressing roll on all the other sides, and the ring having a predetermined diameter is scaled.

Furthermore, the gist of the second invention is that the main shaft is provided on the base, the roll is fixed, the main shaft is in contact with the main shaft roll, and the angle θ is set with respect to the main shaft roll.
A roll given by the above is installed on a slave shaft, the slave shaft is fixed with a fully automatic centering bearing, and the main shaft and slave shaft are engaged by a drive gear, and a presser roll is brought into contact with the master roll and the slave roll. It is characterized by having a.

An example of the present invention will be described below with reference to the drawings.

The bender of the present invention has a main shaft 11 vertically mounted on a base 10,
A roll 12 is fixed to the tip of the main shaft 11. The main shaft 1 is preferably fixed via a tapered roll bear link 13-1, and a bevel gear 14 is provided at a desired position to transmit the driving force of the motor J5 to the main shaft 11. A bearing 13-2 is provided from the required VC.

A roll 17 is fixed to the slave shaft 16 of the present invention so as to come into contact with the mouth to mj of the main roll J2.
is inclined at an angle θ with respect to the main shaft 11j.The rolls 12 and 17 are made to have the same diameter to match their circumferential speeds.

Further, the slave shaft 16 is rotatably mounted on self-aligning bearings 20-1 and 20-2. Furthermore, the slave shaft 16 has an adjusting screw 1) 3-
1, 1.8-2 adjusts the angle θ.

The main shaft 11 and the slave shaft 16 are each provided with a drive gear 2171° 21-2 with one tooth. Although the adjustment mechanism for setting the angle θ is not particularly limited, experiments have shown that a screw structure is more stable and preferable than a hydraulic structure.

The press roll 19 of the present invention is provided in contact with the end surface of the slave roll 7, and presses the portion S of the L-shaped rolled steel strip 1 to facilitate bending. The presser roll 19 may not be driven. FIG. 3 is an explanatory plan view of the roll arrangement of the present invention, and shows the centers O0 and 0 of the main roll 12 and the slave roll 17.
The line G of No. 2 and the roll axis P of the presser roll 19 are arranged in parallel. The presser roll 19 is a cantilever type and has a mounting base 22.
However, it is movable in the inlet and outlet directions of the steel strip 1 by means of screws 23-1 and 23-2, and is movable in the horizontal and vertical directions in the drawing.

According to experiments, the edges E, , E of the presser roll 19.

and line G have a close relationship with the ring diameter to be formed. For example, when the presser roll 19 is installed on the input side of the steel strip 1, the ring diameter becomes small, and on the contrary, when it is installed on the exit side, the ring diameter becomes small. becomes large. However, if the presser roll 19 is located at a position where the edge E1 or E2 is deviated from the center line G, the bending function of the steel strip 1 will be lost.

Therefore, when the above conditions are met, the desired ring diameter is roughly adjusted by the angle θ formed by the main roll 12 and the slave roll 17, and the ring diameter is finely adjusted by the positioning of the presser roll 1≦. It is a good idea to do this.

That is, according to the present invention, the main roll 12 and the slave roll 17
The collar 2 works as a rolling roll by engaging the collar 2, and therefore, when setting the angle θ between the main shaft 11 and the slave shaft 16 to a predetermined angle, the base and tip of the collar 2 should be set at an angle θ according to the angle θ. The reduction works, the desired reduction rate is obtained, the pendent forming of the copper strip proceeds smoothly, and the presser roll is positioned (thereby, a ring with an accurate diameter is manufactured).

In the present invention, the main shaft 11 is preferably fixed using a Taber roll bearing 13-1, and the driving force of the bracket motor 15 is transmitted by the bevel gear 14.
This sufficiently absorbs the load of upward movement of the main shaft caused by the rolling operation of the collar during ring forming by the main roll 12 and the slave roll 17, so that bending is smooth. That is, in the bender of the present invention, the load of arrow a acts on the main shaft 11,
Since the load shown by the arrow is applied to the slave shaft 16, it is preferable to provide a gap Qk at the bottom of the slave shaft 16.

According to experiments, in Fig. 1, tl:L6mm.

t2 (base of brim): l, 43 mal, L+
: 601IlrRI L2: When forming a ring with an inner diameter of 380 to 800 mm using a 40 rough L-shaped steel strip, t
3 (Brim tip): When the angle θ was set and bent to reduce the pressure to 1.34 mm, an accurate ring was obtained that did not require a nose bevel. There were no cracks on the brim.

In addition, the hardness increased, making it suitable for use as a coil insert ring.

According to the present invention, when forming a ring, only a light pressure is applied to the ring portion and the ring is bent while being rolled, so the work is easy, and a ring of a desired diameter can be easily obtained, resulting in great industrial effects.

Hereinafter, the present invention has mainly been described with respect to an apparatus in which the slave shaft is inclined at an angle θ with respect to the main shaft.
The basic idea is that the wall thickness from the base to the end of the collar of the L-shaped steel strip is reduced in accordance with the angle θ, and in actual design, the above-mentioned deformation of the device is Various modifications may be made without departing from the scope of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a partial schematic diagram of a coil inserting ring, FIG. 2 is a front explanatory view of the present invention, and FIG. 3 is a partial plan explanatory diagram of the present invention. 1]: Main shaft 12.17: Roll 13: Tapered roll bear link 16: Slave shaft 19: Presser roll 18: Adjustment screw 20: Self-aligning bearing

Claims (1)

[Scope of Claims] 1. An L-shaped steel strip of a desired length is introduced into a rolling roll having an angle θ, and the wall thickness from the base to the end in the width direction of the L-shape is determined according to the angle θ. A method for manufacturing a rolled ring, characterized in that the other side of the L-shape is pressed with a presser roll while inclined rolling while reducing the thickness in accordance with the above, to form a ring shape sequentially, and the ring having a predetermined diameter is scaled. . 2. A main shaft is provided on the base to fix the roll, a roll that contacts the main shaft roll and is given an angle θ to the main shaft roll surface is provided on the slave shaft, and the slave shaft fully automatic alignment bearing is installed. 1. An apparatus for manufacturing a rolling ring, characterized in that a presser roll is provided, the main shaft and the slave shaft are engaged with each other by a drive gear, and the presser roll is in contact with the main shaft roll and the slave roll.