JP2001009516A - Sizing roller guide equipment and bar steel sizing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bar steel sizing roller guide equipment with high product accuracy. SOLUTION: In order to obtain products with high accuracy, in bar steel steel sizing, it is desirable to adopt a roller driving system which performs sizing while giving a driving force to the sizing roller. However, it is difficult to install it near the rolling roll because the driving shaft to drive the roller poses an obstacle, and for this reason, it must be installed at a distant position. In this case, one or more pairs of sizing rollers 6 are installed to a guide box 2 via an eccentric roller holder 4 whose position can be adjusted to promote compactness of the equipment, and the rotation of the driving shaft 17 provided at a position away from the rolling roll is transmitted via a gear train R, thus overcoming the obstacle due to the existence of the driving shaft. Since this equipment performs sizing while drawing the bar steel by means of the driving sizing rollers, products of high accuracy can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sizing roller guide device and a method for sizing a steel bar.

[0002]

2. Description of the Related Art A sizing device for sizing a steel strip rolled by a rolling roll is classified into the following two types according to a method of rotating a sizing roller.

[0003] As one of the methods, a bar is fed between a pair of rotatable sizing rollers, and sizing is performed while rotating the roller in accordance with the movement of the bar (for example, Japanese Utility Model Laid-Open No. 63-106510). Gazette). As a second method, sizing is performed by driving a sizing roller to draw a strip from a rolling roll while performing sizing processing (for example, Japanese Utility Model Application Laid-Open No. 61-97307).
No.).

[0004]

The prior art 1
Although there is an advantage that the device is inexpensive and the installation space is small because no driving force transmitting means is required, the cross-sectional expansion of the rolled material in the non-rolling-down direction causes a decrease in the dimensional accuracy of the product cross-sectional shape. There is a problem.

On the other hand, the prior art No. 2 has an advantage that the cross section of the rolled material in the non-roll-down direction can be prevented from expanding in the sizing rolling. However, this requires a power transmission means for driving the sizing roller,
In addition to the cost of the apparatus, a space for providing a power transmission means such as a universal joint above the sizing roller is required, so that it is difficult to provide the apparatus near the rolling roll. Since the presence of the power transmission means causes the distance between the rolling roll and the sizing roller guide to be large, there is a problem that this easily causes a misroll.

It is an object of the present invention to provide a sizing roller guide device and a sizing method that employ a type of driving a sizing roller capable of improving product accuracy while reducing installation space and preventing misrolling. is there.

[0007]

In order to achieve the above object, a sizing roller guide device according to the present invention comprises an eccentric roller having a pair of sizing rollers each having a center position adjusting means and a height position adjusting means. A gear train is used as a means for transmitting rotation from the drive shaft to the roller shaft, attached to the holder, and power can be supplied from a drive source at a position away from the rolling rolls. This simplifies the configuration and allows the sizing roller to be installed at a position close to the rolling roll.

The position adjusting means of the sizing roller has a simple structure by allowing the eccentric roller holders to rotate simultaneously in opposite directions so that the center position can be adjusted.

At the same time, the height position adjusting means of the sizing roller rotates a screw gear provided on the outer periphery of the eccentric roller holder so that the eccentric roller holder can advance and retreat in the axial direction. is there.

When a strip is fed from a rolling roll to the sizing roller guide device, sizing is performed by a sizing roller rotationally controlled to a peripheral speed corresponding to the moving speed of the strip.

The rotational drive of a pair of roller shafts is such that the driving force of a single drive shaft is distributed by a gear train so that the pair of rollers can rotate in opposite directions. Done. As a result, it is possible to greatly suppress the width expansion at the time of rolling down as compared with non-driven sizing. In addition, by driving the roller in a tensionless state by controlling the number of revolutions, the reduction in area with respect to the reduced cross-sectional area can be greatly increased as compared with the non-driven sizing, and the steel strip can be extended in the traveling direction. That is, the dimensional accuracy of the product cross section is improved by making the non-roll-down spread at the time of sizing rolling by the roller drive into the elongation in the rolling material advancing direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a sizing roller guide device according to the present invention (hereinafter referred to as "sizing device").
Is a type provided on the exit side of a rolling roll, and is configured by mounting various elements inside and outside a guide box 2 fixed on a base 1. In the sizing device, the left side of the drawing is a leading end approaching the exit side of the rolling roll, and a delivery guide 3 is provided at the leading end.

[0013] The delivery guide 3 has a function of receiving the steel bar sent from a rolling roll (not shown) and sending it into a sizing device. At the same time, a function of peeling the steel bar so that the steel bar is not wound around the rolling roll. Also have.

A pair of eccentric roller holders 4 and 4 are mounted in a space 2a provided in the guide box 2 at a position near the front end (see FIG. 3). The lower half of the eccentric roller holder 4 is formed in a cylindrical shape with an outer peripheral portion having a step, and is rotatable in a state of contacting an arcuate concave surface formed in the space 2a of the guide box 2, The upper part is a cutout for providing a gear train to be described later.

The eccentric roller holder 4 is used for the guide box 2
The outer periphery of the portion mounted in the space 2a has a large diameter, and a cylindrical space having a step is formed therein. In this space, a sizing roller 6 supported on a roller shaft 5 so as to be integrally rotatable therewith is located. Tapered roller bearings 7, 7 are provided on the upper and lower sides of the sizing roller 6, respectively.
Is rotatably supported.

A spline portion 5a is engraved on the outer periphery of substantially the upper half of the roller shaft 5, and a roller driving gear 8 is provided here.
Is mounted so as to be integrally rotatable via the shaft and the spline. The roller driving gear 8 has both ends of a boss 8a extending vertically, and a driving force can be transmitted to the roller shaft 5 by a spline groove formed in an inner diameter portion thereof. The boss portions 8a on both sides of the roller drive gear 8 are supported by tapered roller bearings 7b, 7b, respectively. Each bearing 7b is attached to the eccentric roller holder 4, and supports the roller drive gear 8 so that the roller shaft 5 is indirectly rotatably supported.

A large-diameter portion of the eccentric roller holder 4 located in the space 2a of the guide box 2 is provided with a cooling water supply device 9 for cooling the sizing roller. The cooling water supply device 9 includes the guide box 2
The cooling water can be supplied by connecting to a pipe joint (not shown) provided on one side of.

Below the roller shaft 5, there is provided a bearing tightening adjusting means 10 for adjusting the tightening of the tapered roller bearing 7 which supports both ends of the sizing roller 6. The tightening adjusting means 10 includes a pressing member 10a for pressing the lower end of the roller bearing 7, a rod member 10c formed integrally with the screw gear 10b and supporting the pressing member 10a from below, and rotatably mounting the screw gear. And a screw gear 10d. As described above, this screw gear 10d meshes with the screw gear 10b attached to the base 1, and by turning this screw gear, it is possible to adjust the tightening of the tapered roller bearing.

The eccentric roller holder 4 is fixed immovably in the axial direction by a lid member 11 placed so as to cover the space 2a of the guide box 2. The lid member 11 and the upper surface of the guide box 2 on which the lid member is not mounted are flush with each other, and a gear box 12 for storing a gear train R described later is fixed to the upper surfaces of both of them. .

A worm wheel 4h constituting the center position adjusting means A1 is formed on the side of each eccentric roller holder 4 above the space 2a of the guide box 2.

As shown in FIG. 3, worm gears 13b and 13c having opposite twist angles mesh with the worm wheel portion 4h. The worm gear device 13 including these worm gears 13a and 13b
A shaft portion 13a rotatably supported by a bearing member 14 fixed to the guide box 2, and worm gears 13b and 13c having twist angles opposite to each other and one end of the shaft portion so as to be integrally rotatable therewith. Screw gear 1 attached
3d. A screw gear 15a that rotates integrally with the handle shaft 15 that passes through a hole communicating with the side of the guide box 2 meshes with the screw gear 13d. Therefore, when the handle shaft 15 is manually turned, the pair of eccentric roller holders 4 and 4 rotate in opposite directions through the rotation of the worm gear 13 to move the axial positions C and C of the roller drive shaft 5. It is possible.

In this way, the center position adjusting means A1 enables the axis positions C, C to be minutely moved by the rotation of the worm gear device 13, so that the roller position can be set with high precision.

On the outer peripheral portion near the lower end portion of the eccentric roller holder 4, there is provided a screw gear portion 4s constituting a height position adjusting means A2 of the sizing roller 6. A screw gear 16 rotatably provided from outside the guide box 2 meshes with the screw gear portion 4s. The eccentric roller holder 4 can be moved up and down by rotating the screw gear 16 from outside.

As shown in FIG. 2, the gearbox 1
In the arrangement of the gear train R in 2, the first gear 18 that rotates integrally with the drive shaft 17 and the second gear 19 that is an intermediate wheel are meshed. A third gear 20 meshes with the second gear 19, and a fourth gear 21 meshes with the third gear in parallel with the third gear. The third gear 20 meshes with one roller driving gear 8 that rotates integrally with the roller shaft 5 together with the fourth gear. The other roller drive gear 9 meshes with the fourth gear 21. Since the third gear 20 and the fourth gear 21 are combined to rotate in opposite directions due to the distribution of rotation, the roller driving gears 8 and 9 meshing with the third gear 20 and the fourth gear 21 also rotate in opposite directions. Has become. Therefore, when each gear rotates in the direction indicated by the arrow, the sizing roller 6 rotates integrally with the roller drive gear.
In the same manner, rotational forces in the opposite directions are applied to each other, so that the strip steel fed from the rolling roll can be pulled out and sizing processing can be performed.

As shown in FIG. 1, the gears 18 to 21 constituting the gear train R have rotatably supported shafts formed integrally with each other via roller bearings 22. These roller bearings 22 have bearing housings 23, 2
4 protects the device from dust and the like entering from the outside.

Next, the operation will be described.

First, the worm gear device 13 of the roller center position adjusting means A1 is turned from the outside of the guide box 2 to adjust the center positions C, C of the sizing roller 6 (see FIG. 3). Subsequently, the screw gear 16 of the roller height position adjusting means A2 is turned to adjust the height position of the sizing roller 6.

Next, a rotational force is transmitted from the drive shaft 17 via the gear train R to the roller drive shaft 5 by a roller drive motor (not shown), and rotational forces are applied to the sizing rollers 6 and 6 in opposite directions. The rotation of the sizing roller 6 is controlled by the control of the drive motor so that the transport speed of the strip fed from the rolling rolls matches the peripheral speed of the roller. The above steel bar is a pair of sizing rollers 6, 6
The sizing process is performed when passing through the space, and the sizing device exits from the rear (the right side in FIGS. 1 and 2).

As described above, when the sizing roller is driven at a controlled rotation speed to perform the sizing process, the reduction in area is greatly increased to 80% with respect to the reduced cross-sectional area, and the amount of reduction is increased. The result was that it grew. It can be seen that when the roller was not driven, the reduction in area relative to the reduction cross-sectional area was significantly improved as compared with 15%. This indicates that the non-roll-down spread at the time of sizing rolling by roller driving becomes elongation in the rolling material advancing direction, and the dimensional accuracy of the product cross section can be improved.

In the above description, it is assumed that the number of sizing rollers is one. However, the present invention is also applicable to a device having two or more sizing rollers.

[0031]

According to the present invention, since the sizing process is performed by driving the sizing roller by controlled rotation, it is possible to perform sizing of a steel bar having excellent dimensional accuracy of a product cross section. The sizing device adopting such a roller drive system is realized by adopting an eccentric roller holder and a gear train for power transmission, and can drive a pair of sizing rollers with a simple configuration. Since the apparatus can be installed at a position close to the rolling roll, mis-rolling can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an entire configuration.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIGS. 3A and 3B are cross-sectional views taken along a line BB in FIG. 1A, wherein FIG. 3A shows a state in which the core is located between the maximum cores, and FIG.

[Explanation of symbols]

 Reference Signs List 4 Eccentric roller holder 5 Roller shaft 6 Sizing roller 8 Roller drive gear 17 Drive shaft R Gear train A1 Center position adjusting means A2 Height position adjusting means

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshitaka Nakamura 3434 Shimada, Hikari-shi, Yamaguchi Prefecture Nippon Steel Corporation Hikari Works (72) Inventor Yuji Mori 3434, Shimada, Hikari-shi, Yamaguchi Prefecture New Japan (72) Inventor Sadao Yoshizawa No. 13-12-12, Cold, 13-cho, Nishi-ku, Sapporo, Hokkaido Inventor Shoji Okada Shoji Factory (72) Inventor Shoji Okada, 13-cho, 12-cho, Nishi-ku, Sapporo, Hokkaido No. 13 in Kotobuki Sangyo Co., Ltd.

Claims (3)

[Claims] 1. A pair of sizing rollers provided on an outlet side of a rolling roll for sizing a steel bar fed from the rolling roll, and a roller shaft supporting each of the sizing rollers so as to be integrally rotatable. An eccentric roller holder rotatably supporting the roller shaft, comprising a position adjusting means for the sizing roller, and a drive shaft for applying a driving force to the roller shaft via a gear train. A sizing roller guide device, characterized in that: 2. The eccentric roller holder according to claim 1, wherein the position adjusting means includes one or more eccentric roller holders attached to the guide box so as to rotate about an axis different from the eccentric roller axis. A sizing roller guide device comprising: a center position adjusting means for moving the roller holder in a reverse direction; and a height position adjusting means for moving the roller holder in a vertical direction. 3. A sizing roller, which is integrally rotated with a roller shaft, is fed from a rolling roll by at least one pair of sizing rollers supported by an eccentric roller holder provided with a center position adjusting means and a height position adjusting means of a sizing roller. When sizing the strip steel, the rotation direction is distributed by a gear train that transmits a driving force to the rollers, and the rollers are driven to rotate in opposite directions to each other. A method for sizing a steel bar, characterized by sizing.