KR100887076B1 - An apparatus for rounding end part of steel strip - Google Patents

Abstract

The present invention relates to a device for rounding the tip of a strip to prevent end marks of a coiled cold rolled product, and to a strip tip rounding device for reducing an end mark due to a step formed in a tension reel when the strip is wound.

The present invention, the front end portion having a flying shear provided on the transport path of the strip; A shape bridge for correcting the shape of the strip front end having a body disposed to be transportable to the rear of the flying shear, a roller table fixed to the body, and a plurality of compression rollers rotated by the first cylinder fixed to the body. government; And a rounding forming unit including a second cylinder installed at upper and lower portions of the body and upper and lower rounding members for rounding the front end of the strip by the second cylinder, respectively.

Therefore, according to the present invention, the effect of reducing the defective rate by correcting the shape defects such as wrinkles generated at the tip of the strip and adjusting the rounding part forming distance to form a rounding part to minimize the end mark according to the strip material or thickness to provide.

Strip, Rounding, Winding Device, End Mark, Flying Sheer

Description

Strip tip rounding device {AN APPARATUS FOR ROUNDING END PART OF STEEL STRIP}

1 illustrates an end mark generated when a strip is wound.

(a) is a perspective view showing that the strip is wound on the tension reel,

(b) is a state diagram showing that an end mark is generated on the strip;

Figure 2 shows a conventional end mark reduction device,

(a) is a process flow diagram,

(b) is a situation in which rounding is formed;

3 is a process diagram of a strip tip rounding device according to the present invention;

Figure 4 shows a strip tip rounding device according to the present invention,

(a) is a full perspective view,

(b) is a partial perspective view;

5 shows a strip tip rounding device according to the present invention,

(a) is a side view,

(b) is the operation of the link member;

Figure 6 shows the operating state of the strip front end rounding device according to the present invention,                 

(a) is an enlarged side view of the lifting and lowering of the shape correction unit and the rounding forming unit;

(b) is a perspective view when the pressing roller is raised;

Figure 7 illustrates the operation and effect of the strip front end rounding device according to the present invention,

(a) is a rounding part formation degree by a rounding formation part,

(b) is a detailed view showing that the end mark generation is reduced when the strip is wound on the tension reel.

Explanation of symbols on the main parts of the drawings

10 ..... Shear 12 ..... Drum

12a ..... Knife 30 .....

32 ..... Body 34 ..... Roller Table

36 ..... 1st cylinder 38 ..... link member

40 ..... Pressing Roller Body 42 ..... Pressing Roller

50 ..... Rounding part 52 ..... 2nd cylinder

54 ..... upper rounding member 56 ..... lower rounding member

62 ..... Motor 64 ..... Ball Screw

68,70 ..... support block 72 ..... frame

74 ..... Flexible Coupling 76 ..... LM Guide

80 ..... Hydraulic Tank 82 ..... Hydraulic Pump                 

100 ..... Tension reel 102 ..... Strip

102a ..... endmark 102b ..... rounding

The present invention relates to an apparatus for rounding the tip of a strip to prevent end marks of a coiled cold rolled product. More particularly, the present invention relates to an end mark, which is a surface defect generated on a surface of a strip by a step formed in a tension reel when the strip is wound. A strip tip rounding device for reducing.

As shown in FIG. 1, when the strip 102 of the produced cold rolled product is cut by a cutter and wound up by a winding device, the tip of the strip is wound up in a state perpendicular to the inner diameter sleeve, and thus the tension reel ( An end mark 102a is formed at the front end of the strip 102 by the step 100a formed in 100, and subsequently the strip 102 overlaps the portion where the end mark 102a is formed. The end mark 102a was generated, resulting in the deterioration of quality.

In order to solve the above problems, conventionally, as shown in FIG. 2, when cutting the strip 102 by the end mark reduction device 110 in which a rounding die is installed in a cutter for cutting the strip 102. Rounding the tip of 102 reduces the occurrence of the end mark 102a upon winding of the strip 102 by the tension reel 100.                         

That is, the conventional end mark reduction device 110 cuts the strip 102 by using shear force generated between the upper cutter 112 fixed to the upper portion and the lower cutter 116 rising by the cylinder 114. At this time, the tip of the strip 102 cut by the upper mold 118 fixed to the upper cutter 112 and the lower mold 120 fixed to the lower cutter 116 and rising together is rounded and rounded. To form 102b.

When the rounding part 102b formed as described above is wound around the tension reel 100, it is possible to reduce the surface defects of the strip 102 generated during winding by reducing the occurrence of the end mark 102a.

However, when the thick strip of the strip 102 having a thickness of 2.5 t or more is cut by the upper and lower cutters 112 and 116 applied to the conventional end mark reduction device 110, the pinch roll 122 is connected to the strip 102. ), The front end of the strip 102 is slightly reversed due to the elasticity of the strip 102 and the longitudinal bending generated in the strip 102 when the strip is cut.

Therefore, when the rounded portion 102b is not formed at a predetermined distance from the front end of the strip and the shape of the front end of the cut strip 102 is poor, wrinkles occur in the width direction of the strip 102 or the upper and lower molds 118 and 120. When the rounding part 102b is formed, there is a problem in that the rounding part 102b is not formed at the same distance from the tip.

That is, due to the positional deviation of the rounding part 102b according to the material type or thickness of the strip 102, there is a problem that the reduction effect of the end mark is reduced.

 The present invention is to solve the above conventional problems, the object of the present invention is to transfer the strip leading end cut in the cutter to correct the shape defect of the strip leading edge and then to detect the strip leading edge, to form a rounding portion at a certain position It is an object of the present invention to provide a strip tip rounding device for improving the reduction effect of the end mark.

In order to achieve the above object, the present invention is a device for rounding the front end of the strip during winding the strip in order to prevent the end mark of the coiled cold-rolled product, the flying shear is installed on the transport path of the strip to cut the strip a shear having a shear; A shape bridge for correcting the shape of the strip front end having a body disposed to be transportable to the rear of the flying shear, a roller table fixed to the body, and a plurality of compression rollers rotated by the first cylinder fixed to the body. government; And a rounding forming unit including a second cylinder installed at upper and lower portions of the body and upper and lower rounding members for rounding the front end of the strip by the second cylinder, respectively.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a process diagram of a strip tip rounding device according to the present invention, FIG. 4 shows a strip tip rounding device according to the present invention, FIG. 5 shows a strip tip rounding device according to the present invention, and FIG. It shows the operating state of the strip front end rounding device according to the present invention, Figure 7 shows the action and effect of the strip front end rounding device according to the present invention.

3 to 6 shows a strip tip rounding device 1 according to the present invention, the components of which are described in detail as follows.

The strip tip rounding device 1 according to the present invention includes a front end 10, a shape corrector 30, and a rounding forming unit 50. First, the front end 10 will be described below. same.

As shown in FIG. 3, the front end portion 10 has a flying shear for cutting the strip 102. The flying sheath is cylindrically fixed to the upper and lower portions of the strip so as to be rotatable. Rotary type continuous shear with two knives (12a) on the outer surface of the drum 12, the knife 12a mounted on the outer peripheral surface of the drum 12 rotates together with the drum 12, the continuous strip Cutting of 102 is possible.

The structure of the flying sheer is the same structure as a general flying sheer widely used.

In addition, the shape correction unit 30 disposed at the rear of the front end portion 10 includes a body 32, a roller table 34, a pressing roller 42, the configuration is as follows.

As shown in Figures 4a and 4b, the body 32 is fixed to be transportable on the frame 72 provided on both sides of the transfer path of the strip 102, the bearing is inserted on the frame (72) The ball screw 64 is rotatably fixed by the supported support blocks 68 and 70, and one side of the ball screw 64 is fixed on the frame 72 by the flexible coupling 74. 62).                     

In addition, the LM guide 76 is fixed on the frame 72 and disposed between the support blocks 68 and 70. The ball screw 64 is connected to the connecting portions 32a formed on both sides of the body 32. Rotating is coupled to the nut member 64a coupled to be transported on the ball screw 64, the lower portion of the connecting portion 32a is coupled to the L block 76a coupled to the LM guide 76 is As the motor 62 rotates, the body 32 is configured to be transportable on the frame 72.

As shown in FIG. 4B, the roller table 34 is fixed to the rear part of the body 32 and the guide table 35 is fixed to the front part to support the lower surface of the strip 102. And a plurality of rollers 34a are rotatably fixed to the roller table 34.

On the other hand, the first cylinder 36 is hinged to be rotatable on both sides of the body 32, respectively, and the rod 36a of the first cylinder 36 is rotatable on both sides of the body 32 The link members 38 hinged to each other are rotatably connected to each other.

In addition, between the link member 38, a plurality of pressing rollers 42, the support member 41 is fixed to the pressing roller body 40 to be rotatable, the pressing roller body 40 is shown in FIG. As shown in 4b, one side is fixed to the body 32 so as to be rotatable, and the link portions 40a formed at both sides of the pressing roller body 40 are rotatably connected to the link member 38. .

That is, as shown in Figure 4a, the pressing roller body 40 is inserted into both sides of the body 32, respectively, supported by the upper frame 73 is fixed to the upper portion of the body 32, the rotating shaft fixed It is fixed to the body 32 to be rotatable by being fixed to the rotatable (33).

In addition, on the upper frame 73 fixed to the upper portion of the body 32, the hydraulic tank 80 and the hydraulic pump for supplying a working fluid to the first and second cylinders 36 and 52 through a pipe (not shown). (82) is fixed.

6A and 6B, an edge sensor 48 is mounted at the front end of the support member 41 to detect the front end of the strip 102.

The rounding forming unit 50 includes a second cylinder 52 and upper and lower rounding members 54 and 56 which are molds, and the second cylinder 52 is crimped as shown in FIG. 6. A plurality of pieces are fixed to the front of the roller body 40 so as to be operated downward, and a plurality of pieces thereof are fixed to the lower part of the body 32 to operate upward.

As described above, the upper rounding member 54 and the lower rounding member 56 are respectively formed on the rods 52a of the plurality of second cylinders 52 fixed to the pressing roller body 40 and the lower portion of the body 32. Is fixed so that the tip of the strip 102 is compressed and rounded as the second cylinder 52 is operated.

The strip tip rounding device 1 according to the present invention configured as described above is controlled by a controller (not shown) electrically connected to the motor 62, the first and second cylinders 36 and 52, and the edge detection sensor 48. It works and operates as follows.

As shown in FIG. 3, when the produced strip 102 of the cold rolled product is wound on the preceding tension reel 100 of the winding device, the strip 102 is cut and wound on a new tension reel 100. In this case, the cutting of the strip 102 is continuously cut for the flying shear of the front end 10.

That is, while the conventional cutting method of the up pass shear type cutter is difficult to cut continuously, the flying shear is a knife that the drum 12 rotates and is fixed on the outer circumference of the drum 12. The strip 102 is cut by 12a so that continuous cutting is possible.

As shown in FIG. 6A, the tip of the strip 102 cut by the flying sheer is paused after being transported 200 to 300 mm to the rear of the flying sheer, wherein the shape corrector 30 The rounding forming part 50 is operated.

As described above, when the shape correction portion 30 and the rounding forming portion 50 are operated, the strip 102 is advanced so that the tip is transferred to 1,200 ± 100 mm so that the shape correction portion 30 and the rounding forming portion are formed. 50 is transported into the mounted body 32, wherein the strip 102 is supported by the guide table 35 fixed to the front of the body 32 and the body ( 32) You will enter.

Thereafter, the motor 62 fixed on the frame 72 rotates the ball screw 64 so that the body 32 along the LM guide 76 has a predetermined distance toward the front end portion 10. 350 mm) and then stops. At this time, the front end of the strip 102 is supported by a lower surface fixed roller table 34 of the body 32.

At this time, as shown in Figure 6b, when the pressing roller body 40 is raised and the body 32 moves and stops as described above, as shown in Figures 5a and 6a, the first cylinder (36) is operated to rotate and lower the pressing roller body 40 by 90 ° strip 102 located on the roller (34a) fixed to the roller roller 34 to be rotatable to the roller table (34) ).

On the other hand, the reason for the ascending and descending by rotating the pressing roller body 40 to 90 ° as described above is the front end of the strip 102 by the bending portion generated in the strip 102 passing through each roller This is to press the roller 42 and the rollers 34a of the roller table 34 without causing interference with the rollers 42.

In addition, as shown in FIG. 5B, the link member 38 connecting the first cylinder 36 and the pressing roller body 40 is folded when the pressing roller body 40 rotates and rises. When descending, the compression roller body 40 is raised and lowered by an unfolded structure, and the upper rounding member 54 fixed to the rod 52a of the second cylinder 52 and the second cylinder 52 is raised and lowered. ) Also rotates and descends.

As described above, when the strip 102 is squeezed between the pressing roller 42 and the roller 34a of the roller table 34, the body 32 is driven by the motor 62. Proceed until the edge detection sensor 48 fixed to the support member 41 in the advancing direction detects the leading edge of the strip 102 to correct the crumpled shape of the strip (102).

Subsequently, the body 32 is transferred in the opposite direction to the traveling direction of the strip 102 by a set value and completes the shape correction of the front end of the strip. Thus, the front end of the strip 102 has the upper and lower rounding members ( 54, 56).                     

At this time, as shown in Figure 7a, by changing the set value according to the material or the thickness of the strip 102 so that the end mark is generated to the minimum distance (L) from which the rounded portion 102b is formed from the end of the strip I can regulate it.

Subsequently, the tip of the strip located on the upper and lower rounding members 54 and 56 is compressed between the upper and lower rounding members 54 and 56 as the second cylinder 52 is operated, thereby rounding 102b. Will form.

Thereafter, the body 32 returns to the initial position, thereby repeatedly forming a rounding part 102b at the tip of the strip.

Table 1

Table 1 shows the experimental values for the rounding part forming distance (L) and the end mark generation length when the rounding part 102b is formed with a curvature radius of 70 for ultra low carbon steel having a thickness of 1.2 mm and a width of 1230 mm. As shown in Table 1, it can be seen that the end mark is minimally generated when the distance between the rounded portion 102b is formed at the tip of the strip 102 is 25 mm.

Therefore, as shown in FIG. 7B, when the strip 102 is wound around the tension reel 100, end mark generation due to the step 100a formed in the tension reel 100 may be minimized.

According to the present invention as described above, by rounding the portion to correct the shape defects such as wrinkles generated at the tip of the strip and adjust the rounding portion forming distance (L) to minimize the end mark according to the material or thickness of the strip (102) By forming 102b), the effect of reducing the defective rate can be obtained.

While the invention has been shown and described with respect to particular embodiments, it will be appreciated that the invention can be varied and modified without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (3)

In a device for rounding the tip of the strip when the strip 102 is wound to prevent end marks of the coiled cold rolled product, A front end portion 10 provided on a conveying path of the strip 102 and having a flying shear for cutting the strip 102; A plurality of rotating by a body 32 disposed to be transportable behind the flying sheer, a roller table 34 fixed to the body 32, and a first cylinder 36 fixed to the body 32 A shape correction unit (30) having two compression rollers (42) for correcting the shape of the strip tip; And A second cylinder (52) installed at the upper and lower portions of the body (32) and upper and lower rounding members (54, 56) for rounding the tip of the strip (102) by the second cylinder (52). Rounding forming unit 50; Strip leading edge rounding device comprising a. 2. The strip tip rounding device according to claim 1, wherein the body (32) is transportable by the motor (62) and the ball screw (64) so as to be parallel to the direction of travel of the strip (102). The strip tip rounding device according to claim 1, wherein the body (32) is equipped with an edge sensor (48) to detect the tip of the strip (102) during transfer of the body (32).

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