JPH084831B2 - Clamping device for rolling mill entrance / exit guide - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entrance guide for a rolling mill and a clamp device for the guide.

[0002]

2. Description of the Related Art It is well known that, in the past, an entrance guide was used and a roller guide was frequently used when rolling steel bars, wire rods, etc., but recently, the guide body has become larger as the material cross section becomes larger. ing.

On the other hand, with the production of a wide variety of products and small sizes in a large number, the rolls and sizes are often changed to simplify the guide mounting.
The demand for labor saving is increasing.

As a method of attaching the guide, as shown in FIGS. 5 and 6, the guide main body 11 is placed on the rest bar 12 attached to the stand, and the legs 16 are attached to the clamp plate 1.
3, a hammer 14 and a nut 15 for the rest bar 12
The most commonly used method is to fix the In the figure, a'denotes the length of the leg of the guide body, and b'denotes the distance between the tightening position of the leg and the pass line.

[0005]

In this method, when the guide body is small, there is not much problem, but as the size of the guide body increases, the bolts and nuts become larger and the clamping force must be increased. Work has become difficult and large-scale special tools are needed.

In the rolling mill entrance / exit guide, the guide is constantly adjusted by moving the rolls. When the guide is tightened in an unbalanced manner with the bolt axis tilted, work is carried out in a short time while being hung by a crane. At the same time, the guide may drop from above the bulken due to poor balance.In particular, the output side guide is in direct contact with the force of the rolled material coming out of the rolling rolls, so the conventional clamp bolt method causes a lot of loosening and increases. Many cases are tightened. Further, in this method, unless the clamp is always set vertically, the bolt head nut may come into point contact, which may cause settling, resulting in loss of bolt tension and loosening. Further, the tightening by human power has a problem that the tightening torque lacks stability because the tightening torque varies depending on the age difference and the friction coefficient of the screw portion.

Recently, a method has been used in which the hydraulic power is used for tightening and loosening the mallet bolt 14 and the nut 15 to save labor. As this kind, for example, JP-A-49
Although there is one shown in Japanese Patent Publication No. 87557 (see FIG. 6),
The method using bolts and nuts uses the elasticity of the bolts, and is greatly affected by the properties of the crimping surface of each part, and the tightening force is greatly attenuated by a slight distortion, so retightening during operation was forced. . In the figure, c'is the clamp plate 1
3 shows the distance between the leg tightening position of 3 and the center line of the mounting axis of the clamp plate 13 to the rest bar 12, and e'is between the grounding wire of the clamp plate 13 to the rest bar 12 and the leg tightening position of the guide body 11. The leg tightening force is a distance d '/ e' = (e ') of the pulling force of the mallet bolt 14.
-C ') / e', and the longer the distance of c ', the smaller the leg tightening force.

In the method using the hydraulic device 18 shown in FIG. 6, a removable rhombic block 17 is interposed between the guide leg portions 16 held by the clamp plate 13, and the clamp plate is used to remove the guide body 11. The guide body 11 cannot be removed from the rest bar 16 unless the diamond block 17 is removed by loosening and retreating.
It is troublesome because the work of fitting and removing is required. The present invention aims to solve these problems.

[0009]

SUMMARY OF THE INVENTION The present invention was developed in order to eliminate such drawbacks, and it is a guide for a rolling mill entrance / exit guide.
Clamp device that detachably tightens the legs on the rest bar
The fixed clamp section provided on the
Attaching a rest bar to clamp the legs of the guide in collaboration
The clamp plate that is swingably mounted on the shaft and this clamp
To swing the lamp plate
It is equipped with a fluid pressure cylinder connected to one end,
The guide legs are offset so that the
Pressure on the other end of the clamp plate
Clamp plate as close as possible to the pass line of the rolling machine
Lever-shaped, from the mounting shaft to the other end clamp
The distance from the mounting shaft to the one end connection part of the fluid pressure cylinder
It is smaller than the distance to.

[0010]

[Action] Oite the invention of the above configuration, a gas or liquid
The clamp plate is closed by the operation of the fluid pressure cylinder.
Oscillate in the direction of
Tighten and fix the leg part of the guide with the constant clamp part.
Also, release the fluid pressure of the fluid pressure cylinder to
Swing the rate in the opening direction to release the guide tightening,
The roll of the rolling mill can be moved and removed in the axial direction.
The fluid pressure control is used for both the tightening and releasing operations of this guide.
One-touch because it can be done by turning the roll valve on and off
The guide can be attached and detached. Also a guide
By making the legs 6 of the offset type
The other end of the rate clamp is more rolling than the fixed clamp.
Since it is as close as possible to the pass line of
The other end clan against the load applied to the guide from the thread passing through
It is possible to reduce the rotation moment of the push section. Only
Also, the clamp plate is configured in a lever shape, and
The distance from the mounting shaft to the fluid pressure cylinder
Since it is smaller than the distance to one end of the
Can exert the tightening effect several times compared with the method of
It Therefore, the stability of the guide against tipping
Can be increased. Also, in the fluid pressure cylinder
Since it reduces the load, it can be used as a fluid pressure cylinder.
You can use a compact one and place it under the rest bar.
Can also be easily installed. In addition, leg clamp
Increase the length a between the parts, and adjust the position and path of the other end clamp part.
Make the distance b to the line as short as possible to increase a / b.
Stable, even if the guide body falls due to threading
The degree can be increased.

[0011]

1 is a side view showing the structure of the present invention, FIG. 2 is the same front view, FIG. 3 is the same top view, and FIG. Ru 1 of the cross section of a main portion der. In the figure, a guide body 1 in which a leg portion 6 of a rolling mill entrance / exit guide is offset is placed on a rest bar 2 attached to a stand, and the leg portion 6 is fixed to the rest bar 2 by a clamp device. That is, of the guide
Offsetting the legs 6 means that the rest bar 2
Than the fixed clamp part 2a of
The other end of the clamp plate 3 which is
It means to approach the line A side. The position and 2 shown in the phantom line in FIG.
It is arranged in a row, or in the case of a single row, one rolling mill entrance / exit guide 1 is arbitrarily moved and mounted on the rest bar according to the pass line of the rolled material.
Cylinder for fluid pressure to install 3 in the width of the rest bar
4 is also installed in two places. Reference numeral 10 in the drawing denotes a twist roller incorporated in the guide body 1.

[0012] clamping device includes a clamp plate 3 of the lever type, a hydraulic cylinder 4 using air or hydraulic, etc.
The clamp plate 3 is attached to the rest bar 2.
It is swingably mounted via a mounting shaft 7. Fluid pressure
The cylinder body of the cylinder 4 is the rest bar 2.
It is attached to the lower side via a mounting pin 9 so that it can swing freely.
Cylinder rod 5 is
It is connected to one end of the board 3. This fluid pressure cylinder
-4 is a separate fluid pressure unit such as air or pressure oil,
It is connected by piping through a control valve on the way. The guide body 1 is detachably fixed to the rest bar 2 by turning on / off the control valve.

The fluid pressure cylinder 4 is, of course, designed to generate a necessary force according to the size of the guide and the resistance force of the threading material, but as shown in FIG.
By making the leg 6 of the offset type offset, making the distance b between the clamping position of the clamp plate 3 and the pass line as small as possible, and making the length a of the leg 6 as large as possible and making a / b large, The stability of the guide body 1 against falling and wobbling due to the material is doubled.

Further, the clamp plate 3 is formed into a lever shape to shorten the distance c between the mounting shaft 7 and the tightening position of the leg portion 6 and lengthen the distance d between the mounting shaft 7 and the cylinder rod connecting pin 8 to obtain c / By making d large and doubling the tightening effect of the guide body leg portion 6, the fluid pressure cylinder 4 can be made extremely small, and the compact design is built in the space under the rest bar 2.

As described above, the legs of the guide body are offset, and the tightening position is as close as possible to the pass line, whereby it is possible to increase the stability of the guide body against falling due to threading. In addition, a lever-shaped clamp plate is used with the center of the clamp plate that clamps the guide legs as a fulcrum, and the guide body is clamped by swingably fixing the fulcrum to the rest bar and pushing the other end. By doing so, it is possible to exhibit a tightening effect several times that of the conventional method.

[0016]

As described above, the present invention exhibits a clamping effect several times that of the conventional method, which enables a compact design and can be applied to both large and small guides.
Clamping force is not attenuated by constant direct pressure clamping of the guide, and there is no need to retighten during operation, and the guide is placed on the rest bar to clamp the fluid pressure control valve on / off. Since it can be tightened and loosened, it is possible to provide a highly efficient guide clamp device having extremely high safety and workability.

[Brief description of drawings]

FIG. 1 is a side view showing a configuration of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a top view of the same.

FIG. 4 is a cross-sectional view of an essential part of FIG.

FIG. 5 is a side view showing a conventional clamp device.

FIG. 6 is a side view showing another conventional clamp device.

[Explanation of symbols]

 1 Guide Body 2 Rest Bar 3 Clamp Plate 4 Fluid Pressure Cylinder 5 Cylinder Rod 6 Guide Body Leg 7 Clamp Plate Mounting Shaft 8 Cylinder Rod Connecting Pin 9 Cylinder Mounting Pin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 55-17648 (JP, U) Rikai 63-157407 (JP, U) Rikai 3-91108 (JP, U)

Claims (1)

[Claims] 1. A foot bar of a rolling mill entrance / exit guide is a rest bar.
In the clamp device that is detachably fastened on the
The guide works in cooperation with a fixed clamp part provided on the bar.
Can be swung freely on the mounting shaft of the rest bar to clamp the legs of
Clamp plate provided on the
Connected to one end of the clamp plate to rock
Fluid pressure cylinders, and the legs of the guide are offset,
Attach the other end clamp part of the lamp plate to the fixed clamp part.
The pass line of the rolling mill as close as possible to
The pump plate is constructed in a lever shape, and the other end clip is
The distance to the ramp part from the mounting shaft to the fluid pressure cylinder
Clamping device for rolling mill entrance / exit guide, characterized in that the distance is smaller than the distance to one end connection part of the rolling mill.