KR0120724Y1 - Exit curving device of pinch roll for wire rolling process - Google Patents

Abstract

The present invention relates to a pinch roll exit curve device for improving a laying head (ie, curve adjustment) in a wire rod rolling process, and is provided between a pinch roll 650 and a laying head 600. The device 10 and the curved device 10 comprise a plurality of roller units 20 which are installed on a substantially rectangular reference plate 12, the roller units 20 facing each other with a suitable interval. The roller holders 22 and 24, which are installed and viewed, and the roller holders 22 and 24 support the upper and lower rollers 32 and 34 therein, and have a rectangular plate arranged vertically. It is fixed to the guide body 40 by the bolted bolt 26, the guide body 40 is a hole for receiving the nozzle 42 in the center, and fixed for fixing the nozzle 42 in one side Bolt 44, oil nipple 46 for oil injection to a predetermined portion and water nipple 47 for cooling water supply And at least two by two respectively, the reference plate (L ₃₎ (12), the grid oblique line (L ₁₎ for the precise angle of attachment of the roller unit _{(20), (L 2)} ,, (L 4), At the same time (L ₅ ) is carved at a predetermined interval, the seating groove portion 18 is formed corresponding to the guide body 40, the seating groove portion 18, the upper and lower for adjusting the height of the roller unit 20 It is characterized in that it has a long hole 19 formed in the direction, and since the grain guide is not composed of a single-piece pipe as in the prior art, it is composed of a system in which the angle change is applied by a plurality of roller units, so that it is transported from the outside. Since the process can be visually checked and the structure of fine adjustment of the inclination angle of the roller can be set, the coil winding state can be set and maintained best.

Description

Pinch roll exit curve device in wire rod rolling process

The present invention relates to the improvement of the laying head in the wire rod rolling process. More specifically, the pinch roll exit curve device in the wire rod rolling process for producing high quality wire rod by enabling the curve adjustment of the wire rod in detail. It is about.

In general, the wire rod manufacturing in the steel mill is made by the following process, which will be described schematically with reference to FIG.

In the reheating furnace 100, the billet of the material is heated to about 1100 ° C.

The heated billet is passed through a roughing mill 200, an intermediate roughing mill 300, an intermediate finishing mill 400 and a finishing mill 500. Gradually roll into wire rod of desired dimensions.

Subsequently, after cooling with high pressure water in the water cooling device 600 to obtain primary material characteristics, a curved process of bending the end of the wire rod to facilitate the wire winding by the pinch roll 650, and the laying head 700. Wire rod having secondary material characteristics is manufactured by going through winding process and air cooling process.

Then, the coil focusing process is performed to integrate the coils to make the binding easier, and then the weight is measured through the final binding process and finished with shipping.

The curved process by the pinch roll 650 during the process is to bend the wire rod rolled in a straight line to the pinch roll inlet guide 652 as shown in FIG. That is, the wire rod to be conveyed in a straight shape is given by a feed force by at least two pinch rolls 650 to facilitate the production, and then by the curved guide 654 of the pinch roll exit formed to be inclined at about 10 ° in the downward direction. It is guided and spirally rolled by the rotational force in the laying head 700 to be transported to the air-cooling equipment side.

At this time, the curved guide 654 is damaged in the A portion that is changed from a straight shape to a curved shape due to friction with the high temperature wire rod by the feed force of the pinch roll 650, or when rolling stainless steel with high material adhesion Since the material is pressed into the portion A, there is a problem of forming scratches on the product. In addition, the scratches formed on the curved portions of the curved guide 654 cause scratches on the wire rod surface on which chips are adsorbed and rolled.

In addition, the rolling process of the wire rod should change the curve inclination of the curve guide 654 according to the rolling speed, the type of rolling steel, and the degree of rolling, and the naked eye according to the structural characteristics of the equipment itself through the pipe. Since it is impossible to confirm, it is impossible to know what curve is formed, and once the slope set in response to a certain condition cannot be adjusted, it does not adequately respond to the change in the rolling condition, which causes a problem of inferior or deteriorated coil winding state. have.

In recent years, the coiling state of the coil becomes even worse as the rolling speed is increased, and as a countermeasure, the upper laying head 700 is improved from a 10 ° fixed type to a 10 ° to 30 ° flexible type laying head. Although there is a tendency to be thin, the conventional curved guide 654 is manufactured by bending an integrated pipe, so that only the inclination angle set once can be supported.

Therefore, due to the difficulty in coping with various angles, the guide of the material was not properly performed, causing a problem of winding up.

That is, in the 10 ° to 30 ° control chamber laying head 700, as shown in FIG. 3, the hinge 602 supports one bottom of the laying head 700, and the other side drives the driving means, for example, a hydraulic cylinder. The curved head tilt angle is changed by raising and lowering the laying head 700 by 604. In this case, the laying head 700 is operated by the hydraulic cylinder 604, and the laying head 700 is operated. Is operated up to the straight line guide 610 in front of it, but because the pinch roll exit curve guide 654 is separated from each other can not work together, the straight guide 61 and the pinch roll ( Curve guide part 654 of 650 does not fit well with each other there was a problem that can not guide the material smoothly.

The present invention is designed to solve the conventional problems as described above, it is possible to prevent the occurrence of scratches caused by the curved guide and friction in the rolling process of the wire rod, the wire rod manufacturing process passing through the curved guide can be visually confirmed. It is an object of the present invention to provide a pinch roll exit curve device in a pre-rolling process to adjust the laying head at various inclination angles to cope with various rolling conditions.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic explanatory drawing which shows the normal wire rod rolling process.

Figure 2 is an enlarged front view of the pinch roll curve guide portion.

3 is a cross-sectional view of a winding apparatus showing a winding process in a typical wire rod rolling step.

4 is a schematic front view of a state in which the pinch roll exit curved device of the present invention is installed in the device of FIG. 3;

Figure 5 is an enlarged front view of the curved device of the present invention.

Figure 6 (a) is a perspective view of the roller unit of the present invention.

Figure 6 (b) is an exploded perspective view showing a roller attached state of the present invention.

Figure 7 is a front view of the reference plate for explaining the installation inclination angle of the roller unit of the present invention.

* Explanation of symbols for main parts of the drawings

10: curve device 12: reference plate

14: guide tube 16: fixed clamp

17: fixing bolt 18: seating groove

19: long hole 20: roller unit

22, 24: Roller holder 26: Stud bolt

27: nut 32,34: upper, lower roller

33: ball bearing 35: cap spring

36: seal plate 37: roller pin

37a: oil inlet 37b: split pin hole

39: split pin 40: guide body

42: nozzle 44: fixing bolt

46: oil nipple 47: water nipple

650: pinch roll 700: laying head

L _o : Reference line L ₁ , L ₂ , L ₃ , L ₄ , L ₅ : Scale slope

W: wire rod

The present invention for achieving the above object, by adjusting the angle on the reference plate 12 provided between the pinch roll 650 and the laying head 700 of the wire rod rolling process continuously a plurality of roller units 20 The roller unit 20 has a pair of upper and lower rollers 32 and 34, upper and lower roller holders 22 and 24 supporting the rollers 32 and 34, and the rollers. A guide body 40 for connecting and fixing the holders 32 and 34, and a nozzle 42 which is fixed in a state penetrating a hole formed in the guide body 40 to guide the material, The reference plate 12 is characterized in that each mounting groove 18 is formed so that each roller unit 20 can be installed according to a predetermined angle.

Therefore, according to the above configuration, the transfer process can be visually confirmed and the coil winding state can be set and maintained best because the structure can finely adjust the inclination angle of the roller.

Hereinafter, the structure of the pinch roll exit curve guide in the wire rod rolling process of the present invention will be described in detail with reference to the accompanying drawings.

4 is a cross-sectional view of a winding apparatus showing a winding process in a typical wire rod rolling step.

In this figure, the curved device 10 of the present invention is installed between the pinch roll 650 and the laying head 700.

The curve device 10 will be described in more detail with reference to FIG. 5.

Reference numeral 20 denotes a roller unit of the same configuration. Since these structures are all the same, only the structure of the 1st roller unit 20 is demonstrated typically.

6 is an exploded perspective view showing the configuration of the roller unit 20 of the present invention.

In this figure, 22 and 24 are roller holders which support the upper and lower rollers 32 and 34. As shown in FIG. These upper and lower roller holders 22 and 24 are provided to face each other while maintaining a proper interval, and both of them are fixed by the bolts 26 to the guide plates 40 having a rectangular plate shape arranged vertically. do.

The upper and lower rollers 32 and 34 of the roller unit 20 of the present invention preferably use a cemented carbide (WC) having high wear resistance, so that both sides of the rollers 32 and 34 can withstand high-speed rotation. A ball spring 33 is provided, and a cup spring 35 together with the ball bearing 33 is configured to absorb the axial sliding load received at the time of entry of the material tip as shown in FIG. 6 (b). Is installing.

Reference numeral 37 denotes a roller pin having an oil inlet 37a and a semicircular split pin hole 37b, and 39 denotes a split pin.

The roller holders 22 and 24 are processed so that the concentricity of both holes is accurate, and the bushings having high wear resistance are forcibly fitted into the holes.

Reference numeral 36 is a seal plate installed outside the shafts (not shown) of the upper and lower rollers 32 and 34 to prevent oil exposure. This prevents cooling water or the like from penetrating from the outside during rolling.

Guide body 40 has a hole for installing the nozzle 42 for guiding the material in the center, the fixing bolt 44 for fixing the nozzle 42 is fastened to one side.

Reference numeral 46 is an oil nipple for oil injection, and 47 is a water nipple for cooling water supply. These oil nipples 46 and water nipples 47 are arranged in the respective roller holders 22 and 24 so that oil and cooling water are supplied toward the rollers 32 and 34.

A plurality of roller units 20 having such a structure are installed on a substantially rectangular reference plate 12. In FIG. 5, six roller units 20 are provided on the reference plate 12, but the number of roller units 20 is not limited thereto.

7 is a front view showing an angle display scale engraved on the reference plate 12 before attaching the roller unit 20 of the present invention to the reference plate 12.

Reference numeral 14 is a relatively short guide tube installed in the outlet of the pinch roll 650, the guide tube 14 has a bell mouth shape in order to prevent the separation of the material, It is attached to the reference plate 12 by a fixing clamp 16.

In addition, a seating groove 18 is formed at the position where the plurality of roller units 20 are to be attached to the reference plate 12 corresponding to the guide body 40, and the seating groove 18 is provided with a roller unit ( It has a long hole 19 formed in the vertical direction for adjusting the height of 20).

In addition, the reference plate 12 has scale inclination lines L ₁ , L ₂ , L ₂ , and L ₃ which sequentially increase an angle in a downward direction with respect to a horizontal line, that is, a reference line Lo of a straight portion. ₄ ), (L ₅ ) are inscribed at 5 ° intervals.

In an embodiment of the present invention, 10 °, 15 °,... , But set in 5 steps of 30 °, not necessarily limited to this, the scale gradient line (L ₁₎ ~ (L ₅₎ is abutting the side and one side, i.e., the reference plate 12 side of the guide body (40) In combination with the center line (not shown) inscribed in the center to set the angle of inclination, respectively, the roll unit 20 is installed.

Reference numeral 17 is a fixing bolt for installing the reference plate 12 of the present invention on the wire rod main body. In the present invention, since the reference plate 12 is in a vertical state, it is fixed using four hexagon bolts. .

The operation of the pinch roll exit curve device 10 in the wire rod rolling process of the present invention having such a structure will be described.

First, the wire rod W passing through the pinch roll 650 is charged into the bell mouse-shaped guide tube 14 and guided to the curved device 10.

The wire rod W guided by the first roller unit 20 is guided between the upper and lower rollers 32 and 34 by the nozzle 42 as shown in FIG. 5, and the first upper and lower rollers 32 and 34. Wire rod (W) passing through the) is guided to the second roller unit (20).

Since these roller units 20 have different installation angles, the wire rod W is guided to the laying head 700 in a gentle curve.

Therefore, even if the setting position of the laying head 700 is changed according to the rolling conditions, the pinch roll 650 can be installed variably by changing the position in response to the change. To the laying head 700 is made of a continuous forced supply of the curved wire, thereby reducing the occurrence of defects in the wire rolling process.

On the other hand, in order to adjust the gap between the upper and lower rollers 32 and 34, first, the fixing bolt 44 is disassembled to disassemble the nozzle 42, and then the nozzle 42 is divided into various sizes not shown. Insert the roller center rod of the desired size among the roller center rods.

Then, after fastening the fixing bolt 44 again, loosen the nut 27 fastening the stud bolt 26 to adjust the vertical gap and tighten again, remove the roller center rod of the desired diameter and remove the nozzle 42 again. You can install and use it.

Therefore, the roller unit 20 corresponding to the diameter of each wire rod W is provided suitably.

As described above, when the pinch roll exit curve device in the wire rod rolling process of the present invention is used, the curved guide is not constituted by a single-piece pipe as in the prior art, but a system corresponding to the angle change by a plurality of roller units is used. Because of the structure, the transfer process of the material can be visually checked from the outside, and since the structure of the roller can be finely adjusted, the coil winding state can be set and maintained most appropriately.

In particular, it is possible to prevent the device from being damaged or scratched by the frictional force generated in the pipe-shaped curved guide, and to prevent the damage of the guide because the upper and lower rollers absorb the frictional force generated at the curved portion. There is.

Claims (1)

While adjusting the angle on the reference plate 12 installed between the pinch roll 650 and the laying head 700 of the wire rod rolling process, a plurality of roller units 20 are continuously installed, but the roller units 20 are a pair. Upper and lower rollers 32 and 34 and upper and lower roller holders 22 and 24 supporting the rollers 32 and 34 and the roller holders 32 and 34 to be fixed. And a nozzle 42 for guiding a material to be fixed while penetrating a hole formed in the guide body 40, wherein the reference plate 12 includes the respective roller units. Pinch roll exit curve device in the wire rod rolling process, characterized in that each seating groove 18 is formed so that the 20 can be installed at a predetermined angle.