JPH0659497B2 - Coarse universal rolling mill guide - Google Patents

Description

TECHNICAL FIELD The present invention relates to a guide for guiding an H-shaped rough billet to a rough universal rolling mill in an H-shaped steel rolling facility.

<Prior Art> Generally, H-shaped steel is produced by continuous casting in which blooms and beam blanks are heated and rough-rolled into H-shaped rough billets, and then rough universal mills and edger Is subjected to rough rolling in a plurality of passes, and further finish-rolled by a finish universal rolling mill.

As shown in FIG. 4, the H-shaped rough steel slab roughly rolled by a rough universal rolling mill (hereinafter, simply referred to as a rough U mill) is trimmed into an H shape by a pair of horizontal rolls 3 and a pair of hard rolls 4. However, in order to guide the H-shaped rough billet 1 to the rough U mill 2, guides 6, 7, 8 as shown in FIG. 5 are used. That is, guides 6 are provided on the inlet and outlet sides of the rough U mill 2.
A and 6B are also the flange tip portion 1 of the H-shaped rough steel piece 1.
Guides 7 are provided on the entrance and exit sides of the edger 5 that shapes a and 1b.
A and 7B, and an intermediate guide 8 is arranged between the guides 6B and 7A. Here, the guide 6 of the rough U mill 2
The widths of A and 6B are usually configured to be slightly narrower than the width of the horizontal roll 3.

<Problems to be Solved by the Invention> However, since the width of the guide of the rough U-mill is fixed, the guide along with the horizontal roll of the rough U-mill is changed every time the dimension of the H-shaped steel to be rolled is changed. Since it needs to be replaced, there is a problem that a large number of man-hours are required for replacement.

As means for solving such a problem, for example
-22132 and Jpn. Pat. Appln. KOKAI No. 58-76314, it has been proposed that the vertical distance between the web guide and the intermediate guide can be adjusted. For the shaped steel slab, the guide with only the web is not sufficient, and there is a problem that the web is flawed when stable guidance cannot be performed.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a guide for a rough universal rolling mill that can be used regardless of the dimensions of the H-shaped steel to be rolled.

<Means for Solving Problems> A first aspect of the present invention is a guide used in a rough universal rolling mill for rolling an H-shaped rough shaped steel slab, which is an inner surface of a flange of the H shaped rough shaped slab. A pair of width guides, a width adjusting mechanism for moving the width guides closer to and away from each other in the width direction, and a support shaft extending outside the width guides,
And a taper roller guide which is rotatably supported by the support shaft and which guides the flange tip of the H-shaped rough steel piece together with the width guide, and an ascending / descending device capable of vertically ascending and descending them integrally. A guide for a rough universal rolling machine, characterized in that a pair of structured guides are provided above and below a rolling pass line, and a second aspect of the present invention is a rough universal rolling of H-shaped rough billet. A guide used in a rolling mill, comprising a pair of width guides for guiding the inner surface of the flange of the H-shaped rough steel slab, a width adjusting mechanism for moving the width guides toward and away from each other in the width direction, and the width guides. An eccentric support shaft extending outward, a taper roller guide that is rotatably supported by the eccentric support shaft, moves with the width guide, and guides the flange tip of the H-shaped rough steel piece; A pair of guides are provided above and below the rolling pass line, each of which is provided with a taper roller guide height adjusting device that rotationally drives the eccentric support shaft, and an elevating device that can integrally elevate them vertically. This is a guide for a rough universal rolling mill characterized by that.

<Operation> According to the present invention, since the width guide for guiding the inner surface of the flange is divided into two and the width can be adjusted, it is not necessary to change the guide even if the size of the rolled H-section steel is changed. .

Further, since the taper roller guides for guiding the upper and lower ends of the flange are provided outside the width guide, it is possible to prevent the occurrence of flaws in the H-section steel web.

Further, since the positional relationship in the height direction between the taper roller guide and the width guide can be adjusted, H as the rolling progresses
It is also possible to follow changes in the web thickness and flange height of rough steel billets.

<Example> Below, the Example of this invention is described in detail based on drawing.

FIG. 1 is a front view showing an embodiment of a guide according to the present invention including a partial cross section. In addition, in this figure, the guide on the lower flange side of the H-shaped rough steel billet is shown.
The upper flange side is omitted. In addition, in the following description, reference numerals not shown in the drawings are indicated by ().

In the figure, the width guides 31a and 31b are divided into two,
The H-shaped rough shaped steel pieces 1 are arranged so as to respectively guide the inner surfaces of the flanges 1a. Screw members 38a, (38b) are interposed at the lower ends of the width guides 31a, 31b, and the screw members 38a, (38b) are screwed in opposite directions to each other at their both ends. The outer frame 36a, 36b is screwed to a rotary shaft 37 that is pivotally supported. The rotation shaft 37 is rotated by a drive device 42 via a coupling joint member 41, and a width adjusting device that allows a pair of width guides 31a and 31b to approach and separate from each other.
Make up 40. In addition, in the substantially middle part of this rotating shaft 37,
A sprocket wheel 39 is attached, and has a function of synchronously driving a rotary shaft (see FIG. 2) provided in the longitudinal direction of the guide by an interlocking device such as a chain.

On the other hand, the outer frame 36 is provided in the middle of the width guides 31a and 31b.
The support shaft 32 attached to a and 36b penetrates, and the width guides 31a and 31b can be smoothly slid in the width direction via the sliding members 33 and (33b). At one end of the sliding members 33a, (33b) fitted to the support shaft 32, bearings 34a, (34
Tapered roller guides 35a and (35b) are rotatably supported via b), and the tip of the flange 1a of the H-shaped rough steel piece 1 is guided. These taper roller guides 35a, 35b
The outer peripheral surface of the taper is tapered at the same angle as the inclination angle of the tip of the flange 1a of the H-shaped rough steel piece 1.

In this embodiment, the support shaft 32 is provided so as to penetrate the width guides 31a and 31b. However, if the rigidity of the width guides 31a and 31b can be sufficiently increased, the support shaft 32 may be divided into the width guides. It can be directly fixed to each of 31a and 31b by a cantilever method. Therefore, in this case the outer frame 36
Since there is no need to support with, the configuration becomes simple.

The guide mechanism 30 configured in this way can be raised and lowered by an elevating device 43 provided via a frame 47 attached to the housing of a rough U mill, for example. That is, the lifting device 43 includes worm jacks 44a and 44b provided at the lower end of the frame 47 and a lifting shaft 45 having a screw at one end.
a, 45b and a guide holding member 46, and the guide holding member 46 is joined to the outer frames 36a, 36b. The worm jacks 44a, 44b have shafts 48a,
It is rotated by a worm gear 49 rotated by a drive device (not shown) via 48b, so that the elevating shafts 45a, 45b can be moved up and down.

FIG. 2 is a side view showing a state in which the guide according to the present invention is vertically attached to the pass line PL on the entry side of the rough U mill 2. Note that, for the sake of consistency in the description, the reference numeral of the upper guide is attached with ′.

In the figure, the lifting devices 43, 4 of the vertical guide mechanisms 30, 30 '
3 ′ are frames 47, 47 ′ on the mill housing 2a, respectively
Is fixed through. Further, the rotary shafts 37, 37 'for adjusting the width direction of the width guides 31, 31' are respectively provided at two positions in the longitudinal direction of the guides, and the taper roller guides 35, 35 'are provided.
Are also provided at two places as indicated by the support shafts 32, 32 '. However, these are not necessarily limited to two places, and in the case of the rotary shafts 37 and 37 ', they may be provided at one place as long as the parallelism of the width guides 31 and 31' can be maintained. 35 and 35 'can also be provided in one or three places as required. The guide may be installed not only on the inlet side of the rough U mill 2 but also on the outlet side thereof, and may be provided on the edger 5 side as required.

The following describes how to use this guide.

First, the height of the upper and lower taper roller guides 35, 35 'is adjusted to the height of the flange of the H-shaped rough billet 1 by raising and lowering devices 43, 4'.
Align each by 3 '. Then the width guide 3
The outer width of 1,31 'is the inner width between the flanges of the H-shaped rough billet 1 _WH
Accordingly, as shown in FIG. 1, _WH −2α (where α:
Drive device so that the flange taper + allowance)
Adjust 42, 42 '. After adjusting the respective parts in this manner, the H-shaped rough billet 1 is fed into the guide and centered, and then rough rolling is performed by the rough U mill 2.
Since the height of the flange 1a is slightly reduced by the edger 5 in the rolling pass, the height of the taper roller guides 35, 35 'is adjusted by operating the elevating devices 43, 43' for each pass. Good.

Here, although the thickness of the web 1b naturally decreases as the rolling pass progresses, the amount of reduction of the tip portion of the flange 1a by the edger 5 is smaller than the amount of reduction of the web 1b by the rough U mill 2. Since it is small, the height F _H from the web 1b to the tip of the flange 1a as shown in FIG.
Will increase on the contrary. At the same time, the radius of curvature R of the circular arc at the joint between the web 1b and the flange 1a shown in FIG. 1 also gradually decreases, so that the distance β between the web 1b and the width guides 31, 31 'increases with each pass.

Therefore, if the heights of the width guides 31 and 31 'are kept constant during the rolling pass, there is a possibility that the guide function may not be sufficiently exerted. Therefore, in the present invention, the taper roller guide 35 is further used as necessary. A means for finely adjusting the height of 35 'may be added.

That is, as shown in FIG. 3, the shaft center line C of the support shaft 32 is
Shaft portion 32a supporting the taper roller guide 35a with respect to ₁
The center line C ₂ of the shaft is an eccentric shaft having an eccentric amount of e, and the support shaft 32 is driven by the drive device 51 to the gears 52a,
It is rotatable via 52b.

In this case, the sliding member 33a and the width guide 31 are fitted to each other via the eccentric bush 33a '.
a ′ is such that the center of the outer diameter is aligned with the center line C ₁ of the support shaft 32,
The center of the inner diameter is aligned with the axis center line C ₁ of the eccentric portion 32a. Therefore, even if the support shaft 32 is an eccentric shaft, it can be freely rotationally driven.

The taper roller guide height adjusting device 50 configured in this way
By adjusting the height interval h between the tip end position of the width guide 31a and the taper roller guide 35a by operating the driving device 51 for each rolling pass by using the. Is possible.

The taper roller guide height adjusting device 50 has a simple device if an eccentric shaft is used, but the device is not limited to this. For example, a device for raising and lowering a bearing box used for a pinch roll or the like. May be

<Effects of the Invention> As described above, according to the present invention, it is possible to significantly reduce the types of guides, it is possible to omit the work of changing the guides associated with the size change, and the rolling pass. Since each adjustment is possible, it contributes to improvement of dimensional accuracy of H-section steel and improvement of product quality.

[Brief description of drawings]

FIG. 1 is a front view showing a guide according to an embodiment of the present invention including a partial cross-section, FIG. 2 is a side view showing a mounting state of the guide, and FIG. 4 is a front view schematically showing a rolled state of an H-shaped rough steel slab, and FIG. 5 is a side view showing a conventional example of a guide. is there. 1 …… H type rough billet, 2 …… Coarse universal rolling mill (coarse U mill), 5 …… Edger, 30 …… Guide mechanism, 31 …… Width guide, 32 …… Support shaft, 34 …… Bearing , 35 …… Taper roller guide, 36 …… Outer frame, 37 …… Rotary axis, 40 …… Width adjustment mechanism, 43 …… Lift device, 50 …… Taper roller guide height adjustment device

Claims (2)

[Claims] 1. A guide used in a rough universal rolling machine for rolling an H-shaped rough steel slab, comprising a pair of width guides for guiding an inner surface of a flange of the H-shaped rough steel slab, and the width guides A width adjustment mechanism that moves closer and further away from each other,
A support shaft extending outward of the width guide, and a taper roller guide rotatably supported by the support shaft and moving together with the width guide to guide the flange tip of the H-shaped rough steel piece. A guide for a rough universal rolling mill, characterized in that a pair of guides, each of which is composed of an elevating device capable of vertically elevating these units integrally, are provided above and below a rolling pass line. 2. A guide used in a rough universal rolling machine for rolling a rough H-shaped steel slab, comprising a pair of width guides for guiding the inner surface of the flange of the rough H-shaped steel slab, and the width guides. A width adjustment mechanism that moves closer and further away from each other,
An eccentric support shaft penetrating the width guide and extending to the outside of the width guide, and a flange tip portion of the H-shaped rough shaped steel piece that is rotatably supported by the eccentric support shaft and moves together with the width guide. A rolling path for a guide including a taper roller guide for guiding and a taper roller guide height adjusting device for rotationally driving the eccentric support shaft, and an elevating device for vertically elevating these integrally A guide for a rough universal rolling mill, characterized in that a pair is provided above and below the line.