KR20040026873A - A guide for finishing mill for wire rod - Google Patents

Abstract

PURPOSE: A guide for wire rod finishing mill is provided which promptly adjusts inner diameter of wire rod to prevent excess operation preparing time, prevents guide rollers from being damaged by workpiece shock due to diameter change of the workpiece and prevents centering defects of the wire rod during rolling operation. CONSTITUTION: The guide(1) for wire rod finishing mill is characterized in that holders(10) are mounted on the four sides of a box member(5) having octagonal cross section, respective rollers(30) are rotationally mounted on the holders, long holes(25) are formed at the middle of the holders for the box member, and the holders are fixed by the pivot pin with the long holes being connected by pivot pin(20) in such a way that the holders are moved in a length direction of the box member so that inner diameter of wire rod is adjusted between the rollers to guide wire rods(200) having more various diameters, wherein projected brackets are formed at both sides of the holder groove so that a holder groove(14) is formed on four sides of the box member, pivot pins(20) are insertingly fixed to the respective brackets for forming the holder groove in such a way that the pivot pins traverse the holder groove, and the pivot pins are restingly fixed to the holder groove with the pivot pins being inserted into holders(10).

Description

Guide for wire rod filament rolling mill {A GUIDE FOR FINISHING MILL FOR WIRE ROD}

The present invention relates to a wire rod inlet guide installed at the front of the wire rod rolling mill, which is the final stage in the wire rod rolling process, and more specifically, to adjust the inner diameter quickly so as to prevent excessive preparation time due to frequent replacement of the wire rod. The present invention relates to a guide for an improved wire rod rolling mill in order to prevent the guide roller from being damaged by the impact of the material due to the change in the diameter of the wire during the large diameter of the wire rod, and to prevent the center defect of the wire rod during the rolling operation.

In general, billet, a rolled material in the wire rod process, is heated for about 90 minutes in a heating furnace, extracted to a state of about 1100 ° C., and is subjected to rough rolling, intermediate sand rolling, finishing rolling, and the next process. In the rolling process of the wire rod, the guide is a device installed in the front and rear of the rolling roll from rough rolling to finishing rolling in order to accurately guide the rolled material into the roll mold of the rolling mill.

1 is a perspective view of a finishing inlet guide 100 according to the prior art. Such a guide 100 has a holder 120 is parallel to the longitudinal direction of the box member 110 by a pivot pin 114 is connected to the hollow rectangular box member 110 in the upper, lower side. It is disposed and protrudes to the front side, the rollers 122 are rotatably arranged at the front end of the holder 120, respectively.

In addition, the box member 110 is provided with a front inner diameter adjusting screw 125 and a rear inner diameter adjusting screw 126 to adjust the position of the holder 120, the front of the holder 120 is in direct contact with the rolled material. Roller 122 is coupled to the inside of the box member 110, there is a space in which the insert (INSERT) 130 made of a hollow trumpet shape can be inserted

2 is a cross-sectional view for explaining the operation relationship for adjusting the inner diameter in the conventional wire rod inlet guide 100.

The guide 100 loosens the front inner diameter adjusting screw 125 in a state where the rear inner diameter adjusting screw 126 is loosened, and then tightens the rear inner diameter adjusting screw 126, and each holder 120 is disposed vertically in the middle thereof. The interval between the rollers 122, ie, the inner diameter, is narrowed around the pivot pin 114.

However, in contrast to the above, when the front inner diameter adjusting screw 125 is tightened while the rear inner diameter adjusting screw 126 is loosened, the roller 120 is opened by the holder 120 about the pivot pin 114 and the roller 30. The inner diameter between them becomes large.

If the distance between the rollers 122, that is, the required inner diameter has been adjusted in the same manner as described above, the guide holder 120 is closed by tightening both the front inner diameter adjusting screw 125 and the rear inner diameter adjusting screw 126 so that the gap is maintained. It is fixed in the member 110.

When the necessary distance between the rollers 122 is adjusted in this way, the wire rod 200 having a diameter smaller than the gap may be guided to the finishing mill. However, in the wire rod rolling process, the wire rod 200 having various diameters cannot be guided by the guide 100 maintaining one gap in the process of rolling the wire rod 200 having various diameter sizes.

Therefore, when the diameter size of the wire rod 200 is larger or excessively smaller than the current roller 122 spacing, it is necessary to frequently adjust the spacing of the roller 122, that is, the inner diameter of the guide 100.

On the other hand, at the time of the work of the large diameter wire rod 200, the diameter of the raw material is different from the front end and the rear end of the raw material due to the rolling speed, steel grade, temperature, roll piece wear, etc., and thus, the moment when the wire rod 200 enters the roller 122. Excessive force is applied to the guide roller 122 at one time, and the guide roller 122 is broken to cause equipment troubles that cause the material guide function to be lost.

This is because the conventional guide 100 is provided with only two rollers side by side, to apply a large load biased to the rollers 122 when entering the wire rod, so that the roller 122 from the holder 120 Impact to be separated, in this case, the entire guide 100 must be replaced from a rolling mill (not shown).

Therefore, when the entire guide 100 is replaced from the rolling mill as described above, the guide replacement time is excessively consumed each time, and thus the actual rolling operation time is shortened, thereby acting as a factor that inhibits the productivity of the wire rod rolling operation.

In addition, if the guide is not accurately centered on the rolled roll in the process of mounting the new guide 100, the guide 100 may not accurately guide the wire rod 200 to the finishing mill, thereby causing side scratches, etc. of the wire rod. As described above, there is a problem in that the rolling quality is reduced and, more seriously, the exact rolling reduction of the wire rod cannot be obtained, thereby stopping the operation of the rolling mill and causing an equipment shutdown accident.

The present invention has been drawn in order to solve the conventional problems as described above, the purpose is to adjust the inner diameter quickly according to frequent replacement of the diameter to improve the wire rod rolling productivity according to the shortening of the adjustment time, large diameter rolling work of the wire rod It can withstand the large deformation force applied to the roller according to the change of the diameter of the material, which can greatly improve the durability of the equipment, and the guide for wire rod rolling mill which can secure the excellent rolling quality by preventing the center defect of the wire rod during rolling work. In providing.

1 is an external perspective view showing a guide for wire rod mill according to the prior art;

2 is a cross-sectional view showing a guide for wire rod mill according to the prior art;

3 is an external perspective view showing a guide for wire rod mill according to the present invention;

4 is an exploded perspective view showing a guide for wire rod milling mill according to the present invention;

5 is a cross-sectional view showing a guide for wire rod rolling mill according to the present invention;

6 is an operation explanatory diagram showing an operation of guiding the wire rods in front of the rolling rolls, the guide for wire rod rolling mill according to the present invention;

7 is a cross-sectional view showing an operating state in which the guide for wire rod rolling mill according to the present invention guides the wire rod in four directions in front of the rolling roll;

8 is a side sectional view showing an operation of guiding the wire rods in front of the rolling rolls by the guide for wire rod rolling mill according to the present invention.

<Description of the symbols for the main parts of the drawings>

1 ..... Guide 5 ..... Box member

10 .... Holder 14 ..... Holder Home

16 .... Bracket 18 .... Keyway

20 .... pivot pin 25 .... long hole

30 .... Roller 32a, 32b, 32c .... Inner diameter adjusting screw

40 .... Set screw 130 .... Insert

200 .. Wire rod 200a, 200b ... Rolled roll

As a technical configuration for achieving the above object, the present invention is installed in the front of the wire rod rolling mill, which is the final stage in the wire rod rolling process, in the wire rod inlet guide for guiding the wire rod to the rolling mill, in all directions of the box member of the octagonal cross section. Holders are mounted, and the rollers are rotatably mounted to the holders, respectively, and the holders are formed with long holes in the middle of the box members, respectively, connected by pivot pins to be movable in the longitudinal direction with respect to the box members. By being fixed by the guide for the wire rod rolling mill, characterized in that the inner diameter adjustment between the rollers to guide the wire rods of various diameters are made.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

Guide 1 for wire rod rolling mill according to the present invention, as shown in detail in FIGS. 3 and 4, the holders 10 are mounted on the left and right upper and lower four sides of the box member 5 having an octagonal cross section, To this end, the box member 5 forms brackets 16 protruding to both sides of the holder groove 14 so that four surfaces thereof form the holder groove 14.

In addition, the box member 5 having the octagonal cross section recesses the key grooves 18 to form a keyway between the holder grooves 14, and the key grooves 18 are rolled mills (not shown). Is used to mount the present invention.

That is, the guide 1 of the present invention is the key groove (18) is fitted to the key (not shown) provided on the front side of the rolling roll of the rolling mill, is fixed by a separate fixing bolt (not shown) to be detachable.

Meanwhile, the pivot pins 20 are inserted into and fixed to the brackets 16 forming the holder grooves 14 so as to cross the holder grooves 14, and the holders 10 are fitted to the pivot pins 20. It has a structure that is fixed to the holder groove (14). Long holes 25 are formed in the center of both sides of the holder 10 to allow the pivot pins 20 to be fitted thereto, and to coincide with the stepped portions 14a formed on the bottom surface of the holder groove 14. A step 10a is formed at the bottom of the step 10, and the long holes 25 are formed at both sides of the step 10a.

In addition, the holder 10 is rotatably mounted on the front side with respect to the long hole 25 into which the pivot pins 20 are inserted, and the front, middle, and rear sides of the long hole 25. Inner diameter adjusting screws 32a, 32b, and 32c are respectively installed to penetrate the holders 10 upward and downward, and the lower ends of the inner diameter adjusting screws 32a, 32b, and 32c are holders. It is supported by the bottom surface of the groove 14, respectively.

In addition, the inside of the box member 5 having an octagonal cross section as described above is formed with a space in which a conventional trumpet-shaped insert 130 can be inserted, and fixed to penetrate one side of the box member 5. The screw 40 extends to the insert 130 so that the insert 130 is firmly fixed to the inner side of the box member 5.

As described above, according to the present invention, the holders 10 are fixed to the outer surface of the box member 5 of the octagonal cross section in all directions, and the rollers 30 are fixed to the front of the holder 10 so as to be rotatable. The material of the wire rod 200 passing through the insert 130 of the box member 5 is supported in four directions by the rollers 30 on all four sides.

In addition, since the pivot pins 20 are inserted into the elongated holes 25 in the holder grooves 14, the holders 10 are moved in the longitudinal direction of the box member 5 in the holder grooves 14. Post-positioning is possible.

The inlet guide 1 of the present invention configured as described above adjusts the inner diameter of the roller 30 according to the diameter of the wire rod 200 when the inner diameter adjustment is necessary for rolling the wire finishing mill.

The present invention is a method of adjusting the inner diameter of the holder 10, the inner diameter adjusting screws 32a, 32b, 32c of the front, middle, and rear of the holder 10, respectively, the rear inner diameter adjusting screw 32c When tightening, i.e., inserting it deeply into the inside of the holder 10 so that the inner diameter adjusting screw 32c extends long to the bottom surface of the holder groove 14, the front of the holder 10 is centered about the pivot pin 20. The inner diameter between the rollers 30 is reduced as a result toward the center of the box member 5, and conversely, the front inner diameter adjusting screws 32a are removed with the inner diameter adjusting screws 32a, 32b, and 32c loosened. When tightened, the front of the holder 10 is moved away from the center of the box member 5 about the pivot pin 20, and consequently, the inner diameter between the rollers 30 is opened.

After adjusting the inner diameter corresponding to the diameter of the wire rod 200 to be produced for each holder 10 in this manner, tightening the front inner diameter adjusting screw 32a and the rear inner diameter adjusting screw 32c, the guide holder ( 10 is fixed in the holder groove 14 and the inner diameter is determined.

On the other hand, the present invention not only stably guides the wire rod 200 in four directions as described above, the diameter range of the wire rod 200 that can be supported by the rollers 30 of the holder 10 as compared to the prior art widely Grows

That is, the holder supported by the pivot pin 20 in the state of releasing the inner diameter adjusting screws 32a, 32b, 32c of the front, middle, and rear in the process of adjusting the inner diameter between the rollers 30 as described above. Pull the pivot pin hole 25 of the back to the maximum, that is, the roller 30 is as close as possible to the tip of the insert 130, and in this state, the front, middle and rear inner diameter adjusting screws 32a and 32b. When the inner diameter is adjusted using 32c, the large diameter wire rod 200 can be guided.

However, contrary to the above, the pivot pin hole 25 of the holder 10 supported by the pivot pin 20 in the state of loosening the inner diameter adjusting screws 32a, 32b, and 32c of the front, middle, and rear ends as far as possible. Pulling, i.e., as shown by the dotted line in Fig. 5, so that the roller 30 protrudes as far forward as possible from the tip of the insert 130, and in this state the front, middle and rear inner diameter adjusting screws 32a and 32b. When the inner diameter is adjusted using 32c, the wire rod 200 having a smaller diameter can be guided.

In addition, the upper and lower holder 10 is left as it is, as shown in Figure 6, the left and right rollers 30 are positioned in front of the upper and lower rollers 30, the wire rods 200 are guided from the top and bottom first Then, the left and right are subsequently guided to be guided to the rolling roll (200a) (200b) side.

By doing so, the wire rods 200 having various diameters can be stably supported in four directions and guided to the finishing mill side as compared with the conventional ones, thereby contributing to the improvement of the wire rod rolling productivity by reducing the rolling down time and the maintenance time.

In addition, the present invention, when rolling the large diameter wire 200, the impact load from the material that was concentrated on any one because the rollers 30 disposed on the left and right upper and lower four sides of the material to absorb and absorb the impact of the material This is distributed so that the roller 30 does not fall off from the holder 10.

Accordingly, it is possible to prevent equipment troubles and to prevent frequent replacement of the guide, thereby realizing the productivity improvement according to the reduction of the maintenance work time and the actual rolling work time.

According to the present invention as described above, the diameter of the various wire rods by changing the left and right inner diameter, upper and lower inner diameter of the roller 30 assembled in the holder 10 that caused excessive rolling pause time due to frequent diameter replacement in the wire rod rolling As maintenance is replaced quickly, the rolling break time can be shortened.

In addition, the roller 30 is damaged due to the impact of the material due to the size change of the material during the work of the large diameter wire, so that the roller 30 is not damaged by absorbing the impact of the material in four directions. Work productivity can be achieved by shortening maintenance work time and increasing wire rolling time.

In addition, due to frequent guide replacement to prevent the material scratching caused by poor centering between the guide and the rolling roll, and to prevent the poor rolling of the wire rod has a great effect on improving the quality of rolling.

Claims (4)

In the wire rod inlet guide which is installed on the front surface of the wire rod rolling mill which is the final stage in the wire rod rolling process to guide the wire rod to the rolling mill, Holders 10 are mounted on all sides of the box member 5 in an octagonal cross section, and rollers 30 are rotatably mounted on the holder 10, respectively, and the holders 10 are attached to the box member 5. Long holes 25 are formed in the middle thereof, respectively, and are connected to the pivot pins 20 so as to be movable in the longitudinal direction with respect to the box member 5 so as to guide the wire rods 200 having various diameters. Guide for wire rod milling, characterized in that the inner diameter adjustment is made between the 30). 2. The box member (5) according to claim 1, wherein the box member (5) forms brackets (16) protruding on both sides of the holder groove (14) so that four surfaces form the holder groove (14), and the holder groove (14) is formed. Pivot pins 20 are inserted into and fixed to the bracket grooves 14 so as to cross the holder grooves 14, and holders 10 are fitted to the pivot pins 20 so as to be fixed to the holder grooves 14. Guide for wire rod rolling mill characterized in that the. According to claim 2, wherein the holder groove 14 is formed with a step (14a) in the bottom surface, the step 10a is formed on the bottom surface of the holder 10 to match the step 14a, the step Guide for wire rod rolling mill, characterized in that the long holes (25) are formed on both sides of the (10a). 2. The box member (5) according to claim 1, wherein the box member (5) forms recesses of the key grooves (18) between the holder grooves (14), and the key grooves (18) are provided on a rolling mill (not shown). When the key groove (18) is fitted and coupled, the guide for the wire mill rolling mill, characterized in that the removable is fixed by a separate fixing bolt (not shown).