KR100733375B1 - snubber roll capable of preventing a strip to slide - Google Patents

Abstract

According to the present invention, a snubber roll for holding a steel sheet refracted by the bridle roll in transferring a steel sheet such as a cold rolled coil strip to a transport wheel such as a bridle roll can be stopped at the same time without an operation delay when the bridle roll stops. It is related with the snubber roll which can be prevented from slipping.

The non-slip snubber roll of the strip of the present invention is a general snubber roll (8), wherein the hydraulic cylinder (9) of the operating arm (7) to rotatably support the rotating shaft (11) of the snubber roll (8) The base bracket 12 having a cross-section C shape attached to the opposite end, and integrally formed around the rotation shaft 11 so as to rotate together with the rotation shaft 11 of the snubber roll 8 inside the base bracket 12. The brake wheel 15 to control the rotation of the brake wheel 15 through the pressure block 21 is pressed or released by the brake wheel 15, the actuator 19 connected to the air supply line 17 attached to the air supply line 17. A pair of braking bundles 23 provided on both sides, and attached to one extension end 13 of the base bracket 12 so as to surround the braking bundles 23 by the inner space 25 of the longitudinal cross-section C shape. A braking assembly 2 composed of a case body 27 It is characterized by including.

Therefore, according to the present invention, when the interlocking member such as the bridal roll is stopped, the snubber roll can also be stopped without delay, so that the strip being fed can be prevented from further sliding due to the idling of the snubber roll. You can do follow-up work in the state.

Cold rolled coil, strip, mail order, bridal roll, snubber roll, welding, braking, sliding, tension

Description

Snubber roll capable of preventing a strip to slide}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram schematically showing a strip mailing facility used for a cold rolling process of a conventional general steel mill.

2 is a partially enlarged view showing in detail the bonding state of the snubber roll and the bridal roll of FIG.

Figure 3 is a partially enlarged view showing in detail the bonding state of the snubber roll and the bridal roll according to the present invention.

4 is a side view of FIG. 3;

5 is an exploded perspective view of the snubber roll and brake wheel of FIG. 4.

FIG. 6 is a detailed view of portion A of FIG. 4; FIG.

7 is a plan view of FIG.

8 is a perspective view of FIG. 7;

9 is an exploded perspective view of FIG. 7;

FIG. 10 is a detailed view of portion B of FIG. 4. FIG.

11 is a perspective view of FIG. 10.

12 is an exploded perspective view of FIG. 10.                 

            * Explanation of Signs of Major Parts of Drawings *

1: strip 2: braking assembly

6: bridal roll 7: working arm

8: snubber roll 9: hydraulic cylinder

11: rotating shaft 12: base bracket

15: braking wheel 16: braking ring

17: supply line 18: exhaust line

19: Actuator 21: Pressurized block

23: braking bunch 27: case body

35: rack 39: pinion

41: eccentric roll 43: braking lining

51: uneven portion 57: support shaft

59: case frame 61: iron core

The present invention relates to a snubber roll used to prevent the return of strip material wound or coiled in coil shape, and more particularly, a tension of a strip pressurized by the snubber roll by mounting a brake wheel on the roll axis of the snubber roll. The present invention relates to a snubber roll capable of preventing slipping of a strip to maintain a stable strip feeding by stopping a brake wheel by a separate braking device according to a change.

In general, equipment used for threading coil strips in the cold rolling process of steel mills is provided with a pay off reel (102) for releasing the leading and trailing coil strips (101) as shown in FIG. Welder (104) for dividing shear (103) to increase the welding strength by cutting the trailing end and the leading end of the trailing coil strip and arranging the welding surface of each strip, and the welding strip (101) along the weld surface (104). a welder and a looper 105 for storing the strips, and the like, in order to continuously produce the strips 101 using these facilities, the following process is performed.

First, as shown in FIG. 1, when the strip 101 is released from the payoff reel 102, the rear end and the front end of the leading and trailing strip 101 are cut at the shearing machine 103 to remove contaminants and the like. Then, each strip 101 is advanced to the welding machine 104 to reach the welding area within a certain range, and then the bridle roll 106 is stopped to stop the trailing end of the preceding strip and the following strip in the welding area. Weld the tip of.

However, in this case, the preceding strip 101 loses the holding force on the payoff reel 102 at the moment when the rear end thereof is detected by the sensor 107 installed at the rear end of the shearing machine 103, so that the rotation of the bridal roll 106 is performed. Since the tension due to the driving force is pulled forward sharply to prevent this, the strip 101 is mounted on the outer circumferential surface of the first bridal roll 106 by mounting a snubber roll 108 as shown in FIG. 2. By pressing above a certain pressure is to keep the traveling speed of the strip 101 gently. Furthermore, if the thickness of the strip 101 is thick, the tension of the bridle roll 106 pulling the strip 101 increases, so that the strip 101 proceeds at a higher speed, so that the thickness of the strip 101 The traveling speed of the strip 101 by the snubber roll 108 according to the specification of the coil 109 inserted into the pay-off reel 102 such that the pressing force of the strip 101 of the snubber roll 108 increases in direct proportion to the width. Control is made appropriately.

However, since the snubber roll 108 is installed to rotate in the form of an idler as shown in FIG. 2, the bridle roll 106 forcibly driven by the drive motor is stopped immediately at the same time as the stop of the drive motor. On the other hand, depending on the width or thickness of the strip 101 or the tension formed in the looper 105 is idle for a predetermined amount or more and then stopped. Because of this, the preceding strip 101 is advanced by the amount of snubber roll 108 idling more than the normal stop position, so that the rear end portion is not accurately positioned in the welding area of the welder 104, as shown in FIG. 2. ) And the loop 110 is formed between the bridle roll 106, and as a result, there is a problem that the quality or work efficiency of the product is degraded due to poor welding or equipment trouble.

Accordingly, the present invention has been proposed to solve the problem of the snubber roll used in conjunction with the driving bridle roll in the conventional coil strip plate installation, braking device to prevent the rotation of the brake wheel mounted on the shaft center of the snubber roll Proper control by means of suppressing idle rotation in the snubber roll regardless of the change in the tension of the looper or the thickness or width of the strip so that the rear end of the preceding strip can always be stopped exactly at the welding position of the welder. The purpose is to prevent the formation of loops between the rolls, and further to prevent troubles or deterioration of the quality of the equipment itself.

The present invention is rotatably mounted to the operating arm to press the strip between the bridle roll while pivoting around the hinge axis of the operating arm by a hydraulic cylinder coupled to one end of the operating arm to achieve the above object. In a snubber roll, a cross-shaped U-shaped base bracket attached to the opposite end of the hydraulic cylinder of the actuating arm to rotatably support the rotating shaft of the snubber roll, so as to rotate together with the rotating shaft of the snubber roll inside the base bracket. Braking wheels integrally attached around the axis of rotation, a pair of braking units installed on both sides of the braking wheels to control the rotation of the braking wheels through a pressing block pressurized or released by an actuator connected to the air supply line, and a vertical cross-section It is attached to one end of the base bracket so as to surround the braking bundle by the inner space. Provided is a non-slip snubber roll of a strip comprising a braking assembly composed of an encased body.

Hereinafter, a snubber roll capable of preventing slippage of a strip according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The snubber roll of the present invention is a strip for the bridle roll 6 used for conveying the strip 1 in the coil strip 1 mailing facility during the cold rolling process of a steel mill, as shown in FIG. 3 and FIG. 8. Like a conventional conventional snubber roll that presses (1) is coupled to one side end of the operating arm (7) rotatably installed in a state adjacent to the upper portion of the bridle roll (6) by the hinge shaft (10) In accordance with the operation of the hydraulic cylinder (9) coupled to the other end of 7) while moving up and down the strip (1) passing over the bridle roll (6) to be repeatedly pressurized against the outer peripheral surface of the bridle roll (6) have.

In addition, the snubber roll 8 of the present invention has a base bracket 12, a braking wheel 15, a braking bundle 23 and one side so as to stop without delay when there is a stop command as shown in FIGS. A braking assembly 2 composed of a case body 27 is provided.

Here, the base bracket 12 is attached to one end of the operating arm 7 to support one end of the rotating shaft 11 of the snubber roll 8 in a rotatable state by the bearing block 20, and at the same time the braking assembly 2 ), Which is formed in a cross-section C shape by a disk-shaped base and an upper extension end 13 and a lower extension end 14 extending from the upper and lower sides of the base, and the upper extension end 13 The braking bundle 23 is attached to the lower extension end 14 with uneven portions 51.

In addition, the brake wheel 15 installed coaxially adjacent to the base bracket 12 at the end of the rotation shaft 11 of the snubber roll 8 outside the base bracket 12 may have a snubber roll (as shown in FIG. 5). 8) Rotating in the form of a disc that rotates in conjunction with the rotation, is coupled to the rotary shaft 11 by a pair of fixing nuts 67 coupled to the threaded portion 65 of the rotary shaft 11 on both sides, and penetrates radially The braking ring 16 is fixed to the outer peripheral surface is fixed by the bolt 69 is inserted.                     

As described above, a braking bundle is installed at the bottom of the upper end end 13 of the base bracket 12 to brake the braking wheel 15 that is integrally coupled with the rotation shaft 11 and surrounds the upper portion of the braking wheel 15. 23 is to stop the braking wheel 15 through the pressure block 21 in accordance with the operation of the actuator 19, which is controlled from the outside, for this purpose, as shown in more detail in Figures 6 and 7 Actuator (19), rack (35) and pinion (39), eccentric roll (41), pressure block (21) and the upper and lower tension spring (49), each component (19, 35, 39, 41, 21, 49 are paired symmetrically.

Here, the actuator 19 pressurizes the internal piston 73 by a working fluid supplied into the cylinder 71 through the check valve 29 from the air supply line 17 connected to the external air source (not shown). The push rod 33 connected to the piston rod 72 is advanced, and the on / off valve 31 is opened to release the working fluid inside the cylinder 71 through the exhaust line 18. By reversing the push rod 33 by the restoring force of the pinion 39 engaged by the rack 35 processed on one side of the outer circumferential surface of the push rod 33 is repeatedly rotated forward and backward, for this purpose 17) and the cylinder 71 connected to the exhaust line 18, the piston 73 is slidably inserted into the cylinder 71, the push rod 33 is pushed or pulled in accordance with the movement of the piston 713 Piston rod 72 connected to push rod 33 and piston Fitted around the 72 is configured between the piston 73 and the cylinder inner peripheral surface of the compression spring 75 for repeating the compression and restoration.

The rack 35 machined on one side of the push rod 33 which repeats the forward and backward movement by the actuator 19 and the pinion 39 engaged with the rack 35 are used to control the driving force of the actuator 19 to the rotation axis ( 37 to rotate the eccentric roll 41 attached to the rotating shaft 37.

6, 7 and 8 and 9 is rotatably mounted to the bottom of the fixed plate 80 and the case body 27 through the radial bearing 77 at the top and the thrust bearing 79 at the bottom. In the rotating shaft 37, the eccentric roll 41 is mounted in an offset state in the middle portion, and the bearing 45 is inserted into the eccentric roll 41 up and down. At this time, each bearing stand 45 is fixed around the rotating shaft 37 in the state which allows rotation of the rotating shaft 37 by the bearing 81. As shown in FIG.

The pressing block 21 installed between the eccentric roll 41 and the brake wheel 15 so as to be pressed by the eccentric roll 41 of the rotating shaft 37 is the upper and lower bearing 45 as shown in Figs. Long board-shaped member located between the), the braking lining 43 is attached to the inner surface facing the brake wheel 15, and vertically in the middle of the wing portion 82 extending from the upper and lower edge portion to the rear A pair of guide rolls 83 are rotatably attached by a bearing.

In addition, the upper and lower tension spring 49 faces a pair of upper and lower protrusions 47 protruding upward and downward from the upper and lower inner edges of the wing portion 82 of the pressing block 21 to face the protrusions 47. Since the left and right ends are attached to the upper and lower bearing stands 45 fitted to the rotary shaft 37 at the positions, the length increases when the pressing block 21 is pressed by the eccentric roll 41, and then returns to its original state when the pressing force disappears. The pressure block 21 is returned to its original position.                     

The case body 27 having a longitudinal cross-section forming the U-shaped inner space 25 surrounds the braking bundle 23 arranged to be symmetrical, and as shown in FIG. 6, an upper portion of the base bracket 12 is illustrated. It is attached to the bottom of the extended end 13 by a bolt 84 to partially surround the outer circumferential surface of the brake wheel 15 including the brake ring 16 portion from above.

As shown in FIG. 4, the unevenness forming part 51 attached to the upper surface of the lower extension end 14 of the base bracket 12 so as to be inserted into the lower end of the braking wheel 15 is a braking lining 43 of the pressure block 21. A base block 53, a pair of support shafts, as shown in more detail in FIGS. 10 to 12, as a member for forming irregularities on both sides of the relatively soft braking ring 16 to increase frictional force against (57), a plurality of iron cores 61, a spring 62 for connecting the support shaft 57 in one, and a guide roll (63).

Here, the base block 53 is attached to the bottom surface of the lower extension end 14 of the base bracket 12, as shown in Figs. 10 to 12, a pair of supports 85 in front and back on both side edges Protrudingly installed to support the pair of guide rolls 63 so as to be rotatable, and the guide rolls 63 are installed between the supports 85 so as to contact the brake wheels 15 and rotated by the brake wheels 15. While supporting the brake wheel 15 in a rotating state. In addition, a pair of support shafts 57 are pivotally coupled to the bottom surface of the base block 53 in a space between the front and rear support members 85 by a hinge 55, and the support shafts on both the left and right sides ( 57 is attached with a tension spring 62 at the outer peripheral surface interruption facing each other. The vane-shaped case frame 59 is rotatably mounted on the upper end of each support shaft 57 so as to press both sides of the brake ring 16 when the brake wheel 15 is fitted between the support shafts 57. On the inner surface of each case frame 59, a plurality of conical iron cores 61 having different lengths for each row protrude.

Now, the operation of the non-slip snubber roll of the strip according to the present invention configured as described above is as follows.

Once the snubber roll 8 is spaced apart from the bridle roll 6, the mailing operation is carried out, and the snubber roll 8 is unfolded when the rear end of the strip 1 is released from the payoff reel shown at 102 in FIG. It lowers by the hydraulic cylinder 9 of and presses the strip 1 with a constant pressure with respect to the outer peripheral surface of the bridal roll 6.

At this time, the operation of the braking assembly 2 interlocked with the snubber roll 8 is started, first through the air supply line 17 from the air supply source in association with the operation signal of the shearing machine shown in FIG. The working fluid is supplied into the cylinder 71 of the actuator 19. Accordingly, the piston 73 is advanced along the inner circumferential surface of the cylinder 71, and the piston rod 72 is also advanced together with the pinion (3) by the rack 35 processed on the inner surface of the push rod 33 connected to the front. 39).

As described above, when the pair of pinions 39 installed symmetrically rotate in opposite directions about the respective rotation shafts 37 by the racks 35, the pair of pinions 39 are mounted symmetrically on the rotation shafts 37. The eccentric roll 41 is also rotated in opposite directions with respect to the rotation axis 37 to press the pair of pressure blocks 21 facing each other through the guide roll 83 at the same time inward. That is, as the large diameter side of the eccentric roll 41 rotates toward the guide roll 83, the pushing block 21 is gradually pressed while the amount of pushing the guide roll 83 increases.

In this way, the pair of pressure blocks 21 pressed inwardly have the brake lining 43 attached to the inner side facing each other to be pressed against both sides of the brake ring 16 on the outer circumferential surface of the brake wheel 15 of the brake wheel 15. The rotation is stopped, and thus the rotation of the snubber roll 87 that interlocks with the brake wheel 15 is also stopped.

In this way, the braking roll 8 can be braked in a timely manner by the braking assembly 2, so that the bridle roll 6 and the snubber roll 8 can be stopped at the same time, and thus the idling of the snubber roll 8 is performed. It is possible to suppress the sliding of the strip (1) due to this, even if the braking lining 43 is worn due to the continuous braking action at all times according to the rotation amount of the eccentric roll 41 braking ring (16) You can press on.

In this way, when the welding work of the strip 1 is finished and the next mailing operation continues while the strip 1 is fixed, the snubber roll 8 is first raised by the operation of the hydraulic cylinder 9 and at the same time the exhaust line ( When the on-off valve 31 of 18) is opened and the working fluid is released from the actuator 19, the spring 75, which has been compressed by the piston 73 in the cylinder 71, is restored and the push rod 33 is retracted. The pinion 39 is rotated in the reverse direction by the rack 35. Subsequently, when the eccentric roll 41 rotates in the reverse direction and the portion which presses the guide roll 83 gradually moves from the large diameter side to the small diameter side, the spring 49 that has been tensioned between the bearing 45 and the protrusion 47. ), The brake lining 43 is separated from the left and right sides of the brake wheel 15 and the brake ring 16 by pulling the pressure block 21 toward the rotation shaft 37 while the snubber roll by the brake assembly 2 is restored. The restraint of (8) is released.                     

However, in the process of braking the snubber roll 8 by the braking assembly 2 as described above, the friction coefficient between the braking ring 16 and the braking lining 43 is maintained by a predetermined value or more by a predetermined value or more. That is, if the snubber roll 8 is lowered to come into contact with the strip 1 and the bridle roll 6 and continues to rotate without being braked by the braking assembly 2, the bottom of the braking wheel 15 The case frame 59 of the concave-convex forming part 51 inserted into the spring is rotated about the support shaft 57 by the rotational force of the brake wheel 15, and thus, the spring is formed by a plurality of radially protruding iron cores 61. By forming a plurality of uneven portions on the side of the braking ring 16 in close contact with (62), it is possible to keep the braking force of the pressing block 21 against the braking wheel 15 constant.

As described above, according to the snubber roll capable of preventing slipping of the strip according to the present invention, the brake wheel of the braking assembly provided on the rotation shaft of the snubber roll and the pressurizing block for stopping the braking wheel are used to control the rotation of the snubber roll. , The snubber roll can be stopped at the same time as the bridle roll when stopping the bridle roll to stop the feeding of the strip by maintaining the surface friction coefficient of the braking ring wound on the brake wheel by the iron core of the unevenness forming portion. Therefore, it is possible to effectively prevent the sliding phenomenon of the snubber roll due to the strip tension change.

Therefore, it is possible to prevent equipment troubles that may occur during strip mailing operations in the cold rolling equipment, as well as to produce high quality strip products.

Claims (3)

Press the strip 1 between the bridle roll 6 while pivoting about the hinge axis 10 of the operating arm 7 by means of a hydraulic cylinder 9 coupled to one end of the operating arm 7. In the snubber roll (8) rotatably mounted to the operating arm (7), Base bracket 12 having a cross-sectional U shape that is attached to an end of the hydraulic cylinder 9 opposite side of the operating arm 7 so as to rotatably support the rotating shaft 11 of the snubber roll 8, the base bracket. An actuator 19 connected to the brake wheel 15 and the air supply line 17, which are integrally attached to the rotary shaft 11 so as to rotate together with the rotary shaft 11 of the snubber roll 8 from the inside of the 12. A pair of braking bundles 23 installed on both sides of the brake wheel 15 and a longitudinal cross-section C-shaped inner space to control the rotation of the brake wheel 15 through the pressure block 21 pressed or released by the pressing block 21. And a case body (27) attached to one end (13) of the base bracket (12) so as to surround the braking bundle (23) by means of (25). Snubber Roll. According to claim 1, The braking bundle 23 is activated when the working fluid is supplied from the air supply line 17 via the check valve 29 and is restored when the on / off valve 31 of the exhaust line 18 is opened to release the working fluid. The rotating shaft 37 is engaged with the rack 35 and the rack 35 processed on the actuator 19, the push rod 33 of the actuator 19 and rotatably supported by the case body 27 ) The eccentric roll (41) and the brake wheel (15) to be pressed by the pinion (39), the eccentric roll (41) mounted in an offset state around the rotary shaft (37), and the eccentric roll (41). The upper and lower bearing 45 and the upper and lower bearing 45 for rotatably supporting the pressing block 21 and the rotating shaft 37 is installed between the brake wheel 15, the braking lining 43 is attached to the side surface The upper and lower tension springs 49 of the pressure block 21 are respectively composed of upper and lower tension springs 49 attached to each end. That the listener can beorol slip of the strip, it characterized. According to claim 1, A braking ring 16 is wound around the braking wheel 15, and a base block 53 and a bottom of the base block 53 forming a base at the other end 14 of the base bracket 12. A pair of support shafts 57 pivotally coupled by hinges 55 on both sides of the face, and a plurality of protrusions protruded inside the vane-shaped case frame 59 rotatably mounted on top of the support shafts 57. A spring 62 coupled to an outer circumferential surface facing the pair of support shafts 57 and an iron core 61 and rotatably mounted to the base block 53 to support the brake wheel 15 in a rotational state. A snubber roll capable of slipping the strip, characterized in that the concave-convex forming part (51) made of a guide roll (63) is attached.

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