KR102170940B1 - Rest-bar Apparatus for Rolling Mill - Google Patents

Abstract

A rest bar device of a rolling mill is disclosed. The rest bar device of a rolling mill according to an embodiment of the present invention includes a rest bar body that is provided before and after a rolling mill with ball rolls to guide and guide the material, and a clamp bracket for fixing the rest bar body to the stand base. It includes an arm, and the clamp bracket arm includes a gap adjusting member for adjusting the gap with the rest bar body, and the clamp bracket arm includes a bar-shaped bracket body and a first arm provided at one end of the bracket body and coupled to the stand base. It includes a cylinder and a second arm cylinder provided at the other end of the bracket body and coupled to the rest bar body, and the gap adjusting member is screwed with the second arm cylinder to move forward and backward along the screw line, and the position of the cap can be fixed. Includes cap fixing pin.

Description

Rest-bar Apparatus for Rolling Mill}

The present invention relates to a rest bar device of a rolling mill, and more particularly, to a rest bar device of a rolling mill that is easy to respond to when a gap occurs in the rest bar and is easily replaced when wear occurs.

In general, the wire rod is heated in a heating furnace to enable hot rolling, and then passed through a plurality of rolling mills and sequentially decreases the cross-sectional area of the material, thereby manufacturing a coil shape having a dimension required by the customer.

Many rolling mills can be classified into rough rolling, finishing rolling, finish rolling, and the like, depending on the caliber of the roll. In addition, the rolling mill is equipped with an inlet guide that accepts the wire rod (material) on the inlet side of one rolling mill roll and induces it to be accurately inserted into the roll ball, and the wire rod whose cross section is reduced by rotation and pressure of the upper and lower rolls on the outlet side. It includes an exit guide that guides the inlet to the entrance of the next rolling mill by guiding it at a certain interval. The inlet guide and outlet guide are supported by a rest bar connected to the stand base.

In a series of continuous wire rod work, the inlet guide and outlet guide of the rolling mill are continuously hit by the impact force generated when the material is inserted and the speed at the time of entry, and the impact generated at this time is the lower part supporting the inlet guide and the outlet guide. It is delivered as it is to the rest bar.

Accordingly, the rest bar may steadily expand the internal clearance caused by the repeated impact and wear and tear, and as a result, the inlet guide and the outlet guide fixed to the rest bar also flow. The flow of the inlet guide and outlet guide causes the material to be pulled out when it enters the inlet guide of the next rolling mill, causing scratches on the material or accelerating the wear of the side of the guide. This can lead to an accident (misroll) or slip at the tip of the material, resulting in product quality problems.

On the other hand, when replacing the rolls and carriers of the rolling mill that has reached the end of its service life, a pass line center work is performed to align the centers of the ball (many) grooves and the inlet and outlet guides in the rolls. In order to set the pass line, the main body of the high-load rolling mill must be set by moving the body of the high-load rolling mill to the point where the pass line is marked with respect to the rest bar fixed to the ground using hydraulic equipment. However, as described above, the standard is when a gap occurs in the rest bar. Since the rest bar that is used is also moved and the rolling mill has to be moved several times, unnecessary waste occurs in the replacement time.

Korean Patent Registration No. 10-0939881 (2010.01.25)

The rest bar device of a rolling mill according to an embodiment of the present invention is intended to be easy to respond to when a gap occurs in the rest bar and to be easily replaced when wear occurs.

According to one aspect of the present invention, a rest bar body provided before and after a rolling mill in which a ball roll is provided to fix a guide portion for guiding and guiding a material, and a clamp bracket arm for fixing the rest bar body to the stand base, The clamp bracket arm may provide a rest bar device for a rolling mill that includes a rest bar body and a spacing adjustment member for adjusting the spacing.

In addition, the clamp bracket arm includes a bar-shaped bracket body, a first arm cylinder provided at one end of the bracket body and coupled to the stand base, and a second arm cylinder provided at the other end of the bracket body and coupled to the rest bar body. In addition, the gap adjusting member may include a cap that is screwed with the second arm cylinder to advance and retreat along a screw line, and a cap fixing pin capable of fixing a position of the cap.

In addition, the rest bar body includes a pair of front wells spaced apart from the left and right, and a saddle plate is detachably provided inside the front well, and the clamp bracket arm may be closely coupled to the saddle plate. .

In addition, the rest bar body may include a bar pass hole provided through the left and right, and the bar pass hole may be provided with a body fixing portion that slides with respect to the rest bar body by coupling a rolling mill.

In addition, a scraper for removing foreign substances from the main body fixing part may be provided on the upper part of the bar pass hole.

In addition, a seating table slidably coupled to a rail groove provided in the rest bar body and in which the guide part is installed, the seating table includes a guide protrusion corresponding to the rail groove, and a liner provided under the guide protrusion Panels may be included.

In addition, the seating table includes a stopper fixedly provided at the rear so that the guide portion can be firmly attached and detached in the front-rear direction, and a clamp provided corresponding to the stopper in the front, and the clamp is provided to be slidably detachable from the seating table. I can.

In addition, the stopper and the clamp may be fastened to the base of the guide part in a trapezoidal shape, and the clamp may have a locking protrusion so as not to be lifted along the trapezoidal slope when fastened.

The rest bar device of a rolling mill according to an embodiment of the present invention can compensate by appropriately adjusting the internal play using the gap adjusting unit even if a play occurs in the rest bar.

In addition, in the rest bar device of the rolling mill according to an embodiment of the present invention, since the clamp bracket arm that connects and fixes the stand and the rest bar is supported by the saddle plate detachably provided on the rest bar body, it can be easily replaced when the corresponding part is worn. Can be used for a long time.

In addition, in the rest bar device of the rolling mill according to the embodiment of the present invention, a sliding pad made of stainless steel is installed on the upper and lower surfaces of the main body fixing bar on which the main body of the rolling mill slides, thereby improving sliding operation and preventing corrosion, and fixing the main body. A scraper is provided in the bar pass hole of the rest bar body through which the bar passes, so that scale and sludge generated during rolling can be effectively removed.

In addition, the rest bar device of the rolling mill according to an embodiment of the present invention provides a'L'-shaped liner panel to prevent sliding wear on the seating table to improve the sliding operation, thereby effectively solving the sagging problem of the guide part.

1 is a diagram schematically showing a general wire rod manufacturing process.
2 is a view showing a rolling mill including a rest bar device according to an embodiment of the present invention.
3 is a view showing a rolling mill including a rest bar device and an inlet guide and an outlet guide according to an embodiment of the present invention.
4 is an exploded view of a rest bar device according to an embodiment of the present invention.
5 is a view showing a clamp bracket arm of a rest bar device according to an embodiment of the present invention.
6 is a view showing a state in which a body of a rest bar device, a clamp bracket arm, and a body fixing portion are coupled according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those of ordinary skill in the art. The present invention is not limited to the embodiments described below and may be embodied in other forms. In order to clearly describe the present invention, portions irrelevant to the description are omitted from the drawings, and in the drawings, the width, length, thickness, etc. of components may be exaggerated and expressed for convenience. The same reference numbers throughout the specification denote the same elements.

1 is a diagram schematically showing a general wire rod manufacturing process. Wire rod rolling is performed by heating a billet-shaped hot material (1) made in a steelmaking or slab process to 950 ~ 1,100℃ in a state capable of rolling in a heating furnace (2). Then, after going through a series of rolling processes consisting of rough rolling (3), intermediate rough rolling (4) or intermediate fine rolling, finishing rolling (5), and finishing rolling (6), It refers to the process of obtaining a wire coil.

The hot material (1) with a large cross section is cross-rolled with horizontal and vertical rolling mills, and the inferior quality is rolled by cutting off the shear (7), and the products that have passed through the finish rolling (5) and finish rolling (6) are water cooled ( It is first heat treated in 8), and is alternately wound around the first and second reelers (REELER, 9) by the divert switch (DIVERT SW, 8a) to produce a roll-shaped coil. In addition, the hot material 1 with a small cross section is further dropped by the laying head 11 through the finishing rolling (WL, 10) process and transferred to the conveyor 12, followed by subsequent heat treatment (air cooling, slow cooling, cooling). It is dropped into a reform tube after passing through and transferred to the post-process correction line.

2 and 3 illustrate a rolling mill including a rest bar device according to an embodiment of the present invention. In this embodiment, a rough rolling mill used in a rough rolling process is illustrated as an example.

Referring to the drawings, the rolling mill is installed on the stand base (S) and the rolling mill body portion 100 in which two ball rolls 101 and 102 are rotatably installed, and the rolling mill body portion 100 are installed before and after the material It may include a guide portion 200 including an inlet guide 200A and an outlet guide 200B for inducing and guiding, and a rest bar device 300 on which the guide portion 200 is seated.

The rolling mill main body 100 has two ball rolls 101 and 102 rotatably installed on a vertical and horizontal main frame. The balancing cylinder 105 provided in the vertical body frame 103 can adjust and maintain the roll gap between the upper and lower ball rolls 101 and 102 according to the degree of rolling of the material. The upper and lower ball rolls 101 and 102 are supported on both sides by a choke 106 having a bearing built therein, and receive rotational force by a spindle 107 connected to a motor (not shown). The water jacket 108 may always spray cooling water toward the ball rolls 101 and 102 during rolling.

In addition, the rolling mill body portion 100 is provided on the stand base (S) to position the inlet guide (200A) and the outlet guide (200B) provided in the front and rear and the pass line (PASSLINE) through which the material (1) passes. It is provided to be movable left and right. For example, as shown in FIG. 2, a hydraulic cylinder 109 is provided under the main body of the rolling mill 100, so that when the hydraulic cylinder 109 is operated, the main body 100 of the rolling mill is based on the inlet guide 200A. You can shift left and right. At this time, the guide portions 200A and 200B can fix and maintain the pass line because the lower rest bar device 300 is constrained to the stand base S using the clamp bracket arm 340.

Since the inlet guide 200A and the outlet guide 200B have substantially similar configurations only different positions according to the traveling direction of the wire rod, the inlet guide 200A will be described below as an example of the guide part 200.

The inlet guide 200A is provided in front of the rolling mill main body 100 as shown in FIG. 3 and is seated on the rest bar device 300 connected and fixed to the stand base S. The inlet guide 200A may include a panel guide 201, a static 203, and a guide roll 205 along the entry direction of the material 1. The material 1 that has passed through the panel guide 201 and the stationary 203 in sequence is guided by a pair of guide rolls 205 driven by the rotational force of the material, and is a ball roll of the main body of the rolling mill 100 (101,102). The material 1 rolled in the ball rolls 101 and 102 of the main body 100 of the rolling mill is pushed out by the exit guide 200B, and then proceeds again to the inlet guide of the rolling mill.

The rest bar device 300 is located at the lower end of the inlet guide 200A and the outlet guide 200B, and moves the guide part 200 back and forth from the rolling mill body part 100 during maintenance and exchange work such as a carry burr and a roll. The seating table (refer to 320 in FIG. 4) is assembled on the top.

The rest bar device 300 passes through the rest bar body 310, the seating table 320 provided on the upper part of the rest bar body 310, and the rest bar body 310 left and right as shown in FIG. It may include a main body fixing bar 330 provided so as to, and a clamp bracket arm 340 for fixing the rest bar body 310 to the stand base (S).

The rest bar body 310 includes a pair of left and right spaced front wells 311 provided on the front side, and a sliding well on which a seating table 320 for installing the guide part 200 is slidably installed. 313) and a bar pass hole 315 penetrating the rest bar body 310 left and right.

The front well 311 is a place where the clamp bracket arm 340 for connection with the above-described stand base S is installed, and is in close contact with the clamp bracket arm 340 on the inside of the pair of front wells 311 A saddle plate 312 is provided. The saddle plate 312 is detachably provided in the front well 311 through screws or the like. This is a place where the saddle plate 312 is mounted is a place where wear is likely to occur by repeatedly contacting the clamp bracket arm 340, and the wear of the corresponding part generates a play in the rest bar, and the rest bar play is eventually the guide part 200 This is because it induces the flow of. In this embodiment, the saddle plate 312 is interchangeably mounted on the corresponding front well 311 of the rest bar body 310 in constant contact with the clamp bracket arm 340, thereby reducing the clearance with the clamp bracket arm 340. It can be prevented at the source.

The seating table 320 is coupled to the pair of spaced sliding wells 313 so as to be slidable in the front and rear direction with respect to the rest bar body 310. That is, a rail groove 314 is provided in the sliding well 313, and a guide protrusion 324 corresponding to the rail groove 314 is provided in the seating table 320 to be slidably coupled to each other.

The bar pass hole 315 is provided through the rest bar body 310 to the left and right so that the main body fixing bar 330 can pass therethrough. A scraper 316 is provided on the top of the bar pass hole 315 to remove scale or foreign matter generated during rolling falling to the main body fixing bar 330 while sliding the bar pass hole 315 left and right. Reference numeral 317, which is not described, is a wedge-shaped stopper for preventing shaking of the seating table 320.

The seating table 320 is a liner panel 322 under the guide protrusion 324 that is slidingly coupled to the rail groove 314 of the rest bar body 310 to improve sliding movement with the rail groove 414 and prevent friction. ) Can be included. The liner panel 322 may be provided in a'L' shape and installed on the left and right sides of the seating table 320, and through this, the sagging problem of the guide part 200 may be solved.

In addition, the seating table 320 is provided with a stopper 321 at the rear so that the guide part 200 can be firmly attached and detached in the front and rear direction, and a clamp 323 may be provided in correspondence with the stopper 321 at the front. have. The stopper 321 and the clamp 323 protruding from the top of the seating table 320 are provided to be inclined downward from the longitudinal end to the inward, and the guide part 200 to be inclined upward from the end to the inward along the longitudinal direction at the bottom. Since a pedestal (not shown) is provided, the guide part 200 can be securely fixed without shaking while being seated on the seating table 320 in a trapezoidal shape.

The clamp 323 is provided to be slidably assembled to the seating table 320. As described above, the clamp 323 is detachably installed on the seating table 320 in the longitudinal direction so that the guide portion 200 and the seating table 320 can be fastened and assembled in a trapezoidal shape, and the seating table 320 It may include a locking projection 325 in the lower part so that the clamp is not lifted along the inclined surface when fastened to. The clamp 323 has a clamp hole 326 and is firmly fixed to the seating table 320 with bolts (not shown).

The main body fixing bar 330 is a rectangular horizontal body fixing bar 332 passing through the bar pass hole 315 of the rest bar body 310 left and right, and in a vertical direction at both ends of the horizontal body fixing bar 332. It includes a vertical body fixing bar 334 provided. The horizontal body fixing bar 332 has sliding pads 335 and 336 made of stainless material to facilitate sliding and prevent corrosion on the upper and lower surfaces, respectively, and the vertical body fixing bar 334 is It is coupled to the vertical body frame 103. A groove for collecting foreign matter is provided at the center of the sliding pads 335 and 336 in the longitudinal direction.

The clamp bracket arm 340 has one end coupled to the stand base S, and the other end coupled to the saddle plate 312 of the rest bar body 310. To this end, the clamp bracket arm 340 includes a first arm cylinder 342 and a second arm cylinder 343 in a hollow shape at both ends of the bar-shaped bracket body 341 as shown in FIGS. 5 and 6. Equipped. The first arm cylinder 342 coupled to the support (S1) of the stand base (S) is fixed with a bolt (B) penetrating the inner hollow, and is coupled to the saddle plate 312 of the rest bar body 310. The two arm cylinders 343 are tightly fixed to the saddle plate 312 so that both sides do not shake.

In addition, between the second arm cylinder 343 of the clamp bracket arm 340 and the saddle plate 312, a gap adjusting member for compensating the gap due to wear of the saddle plate 312 or the clamp bracket arm 340 is provided. Can be. The gap adjusting member may adjust the gap with the saddle plate 312 while advancing and retreating along a screw line formed in the inner circumference of the second arm cylinder 343 with a cap 344 in the form of an adjusting screw. A cap fixing pin 346 for fixing the position of the cap 344 may be provided in the radial direction of the second arm cylinder 343.

The rest bar device of the rolling mill according to the present embodiment can compensate by appropriately adjusting the gap between the rest bar body 310 and the clamp bracket arm 340 using the gap adjusting unit even if a gap occurs in the rest bar body 310. In addition, since the clamp bracket arm 340 connecting and fixing the stand base (S) and the rest bar body 310 is supported by the saddle plate 312 detachably provided on the rest bar body 310, the saddle plate The setting time can be shortened by simply replacing it when it is worn.

In addition, the rest bar device of the rolling mill according to the present embodiment improves the sliding operation by installing replaceable sliding pads 335 and 336 made of stainless, respectively, on the upper and lower surfaces of the main body fixing bar 330 on which the rolling mill body portion 100 slides. And it is possible to prevent corrosion, and effectively remove scale and sludge generated during rolling by providing a scraper 316 in the bar pass hole 315 of the rest bar body 310 through which the main body fixing bar 330 passes. In addition, in order to prevent sliding wear on the seating table 320, a'L'-shaped liner panel 322 is provided under the guide protrusion 324 to improve shaking and sliding motion, and thereby sagging of the guide unit 200 Can also be solved effectively.

100..Roller main body 101,102..open furnace
200..guide part 200A..entrance guide
200B..Exit guide 300..rest bar device
310..Front well 312..Saddle plate
314..rail groove 315..bar pass hole
320..seat table 321..stopper
322..Liner panel 323..clamp
324..guide protrusion 325..jaw
330..Main body fixing bar 335,336..Sliding pad
340..clamp bracket arm 342..first arm cylinder
343..second arm cylinder 344..cap

Claims (8)

A rest bar body that is provided before and after a rolling mill in which a ball roll is provided, and fixes a guide that guides and guides the material
A clamp bracket arm for fixing the rest bar body to the stand base,
Including a gap adjusting member for adjusting the gap between the clamp bracket arm and the rest bar body,
The clamp bracket arm includes a bar-shaped bracket body, a first arm cylinder provided at one end of the bracket body and coupled to the stand base, and a second arm cylinder provided at the other end of the bracket body and coupled to the rest bar body,
The gap adjusting member
A rest bar device of a rolling mill comprising a cap that is screwed with the second arm cylinder to advance and retreat along a screw line, and a cap fixing pin capable of fixing a position of the cap. delete The method of claim 1,
The rest bar body includes a pair of front wells with left and right spaced apart,
A saddle plate is detachably provided inside the front well,
The clamp bracket arm is a rest bar device of a rolling mill that is closely coupled to the saddle plate. The method of claim 1,
The rest bar body includes a bar pass hole provided through right and left,
The rest bar device of the rolling mill is provided with a main body fixing unit that is coupled to the bar pass hole and slides with respect to the rest bar body. The method of claim 4,
A rest bar device of a rolling mill is provided with a scraper for removing foreign substances from the main body fixing portion at an upper portion of the bar pass hole. A rest bar body that is provided before and after a rolling mill in which a ball roll is provided, and fixes a guide portion for guiding and guiding the material;
A clamp bracket arm for fixing the rest bar body to the stand base,
A gap adjusting member provided on the clamp bracket arm to adjust the gap between the clamp bracket arm and the rest bar body,
And a seating table slidably coupled to a rail groove provided in the rest bar body and in which the guide part is installed,
The seating table is a rest bar device of a rolling mill including a guide protrusion corresponding to the rail groove and a liner panel provided under the guide protrusion. The method of claim 6,
The seating table includes a stopper fixedly provided at the rear so that the guide part can be firmly attached and detached in the front and rear directions, and a clamp provided corresponding to the stopper at the front,
The clamp is a rest bar device of a rolling mill that is provided to be slidably detachable from the seating table. The method of claim 7,
The stopper and the clamp are fastened in a trapezoidal shape with the base of the guide part,
The clamp is a rest bar device of a rolling mill having a locking step so as not to be lifted along a trapezoidal slope when fastened.

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