KR20020049688A - Clutching device of levelling roll - Google Patents

Abstract

PURPOSE: A power cutoff device of a leveling roll is provided to simplify the structure of a speed reducer of the leveling roll and to reduce production cost by clutching the connection between a leveling roll and a universal joint during idling operation of the leveling roll. CONSTITUTION: A power cutoff device of a leveling roll comprises an upper supporting portion, a lower supporting portion and a clutch portion. The upper supporting portion is moved up and down together with the clutch portion which is assembled with a universal joint(70). The upper supporting portion includes a supporting frame which connects a frame(52) with a block(30c), a sensor(30j) for sensing whether or not a movable-side clutch portion(30b) is operated, and a base for fixing the sensor(30j). The lower supporting portion is fixed to a bearing block(30c) of a lower roll(60). The lower supporting portion is moved together with the universal joint(70) during up-and-down movement of the lower roll(60) by a screw jack(62). The lower supporting portion includes a supporting frame(20a) which connects a roll bearing block(61) with a block(20b) of a spline shaft(30f), a sensor(30j) for sensing whether or not a movable-side clutch portion(30b) is operated, and a base for fixing the sensor(30j). The clutch portion is axially movable and rotatable in a spline by means of a cylinder according to operation of a solenoid valve(30i) in order to connect or disconnect power, if required. The clutch portion transmits power only in one way by a ratchet-shaped teeth surface.

Description

Leveling roll power shut-off device {CLUTCHING DEVICE OF LEVELLING ROLL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power cut device of a leveling roll for improving the surface flatness of a hot rolled steel sheet, wherein the leveling roll whose center line changes from time to time is universal when driven by an advancing strip by rolling down the upper roll in a line operation state. A leveling roll power interrupter for preventing the continuous rotation of the joints and gears.

1 to 4, the processor leveling rolls 50 and 60 in continuous lines such as pickling lines, pickling oiling lines, and pickling plating lines, which are post-processing facilities for hot rolled products, are coiled hot rolled steel sheets. When the reel 200 is finished and the trailing coil tip proceeds to the pinch roll 300 at the front of the leveling roll, and the sensor 300a is detected, the upper leveling roll 50 is down and the face April is inserted into the coil to be mounted. Upon completion, the clutch 80b in the speed reducer 80 for driving the leveling roll is operated to transfer the coil tip to the welder 400 by interlocking with the pinch roll 300 by the power of the motor 90 and welding between the leading and trailing strips. When the complete signal is received, the clutch 80b of the leveling roll reducer 80 is opened to block the bite with the input gear 80a connected to the motor 90.

When the roll, the universal joint 70, and the roll drive side gear 80d in the reduction gear continue to be driven by the strip, and the strip is released from the face reel 200 and the END part passes through the pinch roll, the sensor When the 300a is sensed and the upper leveling roll 50 is opened, the operation of stopping the rotation is repeatedly performed. A power transmission device such as gears and universal joints in a reduction gear necessary only to transfer the coil tip to the welding machine. As the drive continues to be driven together with the roll during idling driving, the bearing (BRG, 80e) in the gear box 80 may be shortened, and the universal joint may be damaged during line operation, thereby causing a decrease in productivity due to line stoppage.

That is, when the strip end portion of the preceding coil exits the leveling rolls 50 and 60 and the material of the trailing coil to be worked is determined, the lower three rolls vertically move by the screw jack 62 according to the thickness and the material of the steel sheet ( 60 is fixed at an appropriate position by the input data, and the strip leading end of the trailing coil, which is in standby, goes to the pinch roll 300 and stops by detecting the sensor 300a. 51) is lowered between the lower three rolls and the clutch 80b in the leveling roll reducer 80 can transmit the power of the motor 90 to the roll when the coil mounting completion signal is received from the front reel 200. Then, the leading end of the strip released from the face reel in conjunction with the pinch roll is transferred to the welder 400 at low speed.

When the welding completion signal between the leading and trailing strips falls, the clutch in the leveling roll reducer is disconnected and the motor is disconnected. When the notching for the weld marking is completed, the high speed rotation is performed. While the strip is in progress to improve the flatness of the upper and lower rolls to cross each other while pressing the strip to rotate, due to the limitation on the installation position of the reducer and the center line of the roll does not match the universal joint 70 Power transmission is achieved by this.

It is not only rotated at a certain angle, but also changes in speed such as high speed, low speed, stop, etc., resulting in universal joint spline wear or cross kit bearing damage. The failure leading to the stop occurs frequently and the gear 80d of the roll driving side of the rear end of the clutch in the reducer is always rotated in the same manner as the roll, which contributes to shortening the life of the bearing 80e that supports it, as well as the operation of the clutch 80b in the reducer. There are many problems such as not only the disassembling of the reducer casing at the time of inspection and repair, but also the inability to check the clutch operation during line operation.

The present invention was created in order to solve the above conventional problems, the leveling roll for blocking the rotation of the universal joint and gear during the idle driving in the leveling roll that the center line of the drive side and the driven side changes according to the power transmission from time to time The purpose is to provide a power interruption device.

The above object of the present invention is a clutch unit assembled with the universal joint and the upper and lower movement at the same time and the support frame for connecting the frame and the block and the upper support including a sensor for detecting the operation of the flow-side clutch unit and a base for fixing it; Sensors that are fixed to the lower roll bearing block and that the universal joint moves together when the roll jack is rolled down by the screw jack, is connected to the roll bearing block, and connects the roll bearing block and the block on the spline shaft, A lower support including a base fixing the same; It is achieved by including a clutch that is capable of axial movement and rotation in the spline by the cylinder and actuated only in one direction by the ratchet type tooth according to the solenoid valve operation to interrupt power when necessary.

1 is a configuration diagram showing a leveling process of a typical strip,

Figure 2 is a front view showing a leveling roll installation cross section according to the prior art,

Figure 3 is a side view showing a leveling roll installation cross section according to the prior art,

4 is a perspective view showing the arrangement of the device according to the prior art;

5 is a perspective view showing the arrangement of the device according to the invention,

6 is a side cross-sectional view of a leveling roll power shutoff device according to the present invention;

Figure 7 is an assembled perspective view showing a leveling roll power cut device according to the present invention.

Explanation of symbols on the main parts of the drawings

10,20: support portion, 10a: support frame,

30: clutch portion, 52: roll frame,

70: universal joint.

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

According to FIGS. 5 to 7, in the leveling roll power shut-off device of the present invention, the upper support part 10 has a base assembleable as a bolt (BOLT, 10d) to an existing roll frame 52 and has a universal joint ( 70 of the cylinder 30h which operates simultaneously with the bolt 10e and is connected to the spline shaft block 10b in which the bearing 10c is incorporated so as to rotate while engaging the clutches 30a and 30b. Universal joint with a fixed side base (10f) including two proximity sensors (30j) and a base (30k) that can detect the opening (OPEN) and close (CLOSE) of the clutch by the cylinder on the top and It is configured to have sufficient strength to fix the block.

The lower support portion 20 has a base which can be assembled to the existing leveling roll block BLOCK 61 by bolts 20d, and has a universal joint 70 and a roll up-down by a screw jack 62. Fixed side base of cylinder 30h which operates at the same time by connecting bolt 20e to spline shaft block 20b with built-in bearing 20c so as to be rotated when clutch 30a, 30b is engaged. It is configured to have sufficient strength to fix the universal joint and the block, including 20f and two proximity sensors 30j capable of detecting the opening and closing of the clutch by the cylinder on the side, and a base capable of fixing them.

On the other hand, one side of the clutch portion 30 is a flange (FLANGE) is fastened by the existing universal joint 70 and the bolt (30g), the shaft portion (SPLINE) to form a spline (spline) to form a flow side clutch (30b) Axial sliding on the spline shaft by the spline shaft 30f and the pneumatic cylinder (AIR CYLINDER, 30h) which allow the sliding to be axially slidable and allow rotation during clutch engagement via the bearing 30e. Flow side clutch 30b which is capable of being formed and has a ratchet-shaped tooth surface to facilitate power transmission in the strip traveling direction and is rotatable via a bearing 30e when engaged with the fixed clutch portion 30a on the roll side. The fixed side base is assembled to the block 30c having the cylinder rod (ROD) side fixing portion 30d and the supporting portions 10a and 20a so as to fix it, support the bearing, and smoothly slide the clutch by the cylinder 30h. Being The rod is assembled to the flow side clutch block 30c so that the strip is assembled to the pneumatic cylinder 30h actuated by the solenoid valve 30i operation, if necessary, to the leveling roll shaft and engages against the flow side clutch 30b. It consists of the fixed side clutch 30a which provided the ratchet type tooth surface so that power may be transmitted to an advancing direction easily.

In the present invention configured as described above, the flow side clutch block 30c is opened by the support portions 10a and 20a by opening the flow side clutch 30b in a state where pressure is normally applied to the head HEAD side of the pneumatic cylinder 30h. And the spline shaft blocks 10b and 20b are fixed, the universal joint 70 connected thereto is held still and the leveling rolls 50 and 60 are driven with idle according to the fixed side clutch 30a and the strip progression. When the coil end portion passes through the pinch roll 300, the photo sensor (PHOTO SENSOR, 300a) senses this and the power cut-off device is lifted up by the upper support portion 10 together with the upper leveling roll 50 by the hydraulic cylinder 51. When the data DATA of the waiting material is input, the lower three rolls 60 are respectively turned up or down together with the power cut-off device connected to the lower support 20a by the screw jack 62.

Subsequently, when the trailing coil tip part is introduced into the pinch roll 300, the upper roll is down by the hydraulic cylinder, and when the coil mounting is completed on the front reel 200, upper and lower solenoid valves 30i operate to operate the pneumatic cylinder 30h. By operating the spline shaft portion 30f, the flow side clutch portion 30b and the block 30c are engaged with the fixed side clutch 30a of the leveling roll, and when the proximity sensor 30j for detecting this is detected, As the roll is rotated by the power of the leveling roll motor 90 in conjunction with the pinch roll, the strip end portion released from the page reel is transferred to the welder 400. The fixed side 30a and the flow side clutch 30b are operated by a cylinder. If the ratchet type of teeth does not fit correctly, there is a clearance with the pinch roll, so that the floating clutch part is smoothly engaged as it rotates with the universal joint.

On the other hand, when the welding completion signal between the leading and trailing strips is received, the solenoid valve 30i is operated again to return the flow-side clutch 30b to the original state by the cylinder 30h, and the proximity sensor 30j confirms the return. When sensing, the leveling rolls 50 and 60 are driven at high speed to normal idle, and this operation is repeatedly performed, so that the universal joint 70 and the reducer 80 by the leveling roll power cut device (FIG. 9) can be repeatedly operated. This is to prevent the continuous rotation of the gear bearing (80e).

As described above, according to the present invention, the universal joint and the gear bearing are moved by interrupting the connection between the leveling roll and the universal joint by using a power cut-off device when driving the leveling roll by the normal line operation after the completion of welding. It prevents rotation of the machine and shortens the lifespan of the machine, and prevents accidental breakdown such as universal joint spline wear or cross kit bearing breakage and the resulting line stop, reducing productivity and reducing the structure of the reducer. You will get a drop effect.

Claims (1)

A sensor for detecting whether the universal joint 70 and the assembled clutch unit 30 are simultaneously moved up and down and the support frame 10a and the floating side clutch unit 30b which connect the frame 52 and the block 30c are operated. 30j) and an upper support portion 10 including a base 30k fixing the same; The lower roll 60 is fixed to the bearing block 30c, and the universal joint 70 moves together when the roll 60 is moved up and down by the screw jack 62, connected to the roll bearing block 61, and the roll bearing block 61. Lower support including a support frame (20a) for connecting the block 20b of the spline shaft (30f) and a sensor (30j) for detecting the operation of the flow-side clutch portion (30b) and the base (30k) for fixing it ( 20); It is configured to include a clutch portion 30 which is capable of axial movement and rotation in the spline by the cylinder according to the operation of the solenoid valve 30i so as to control the power if necessary, and the power transmission in one direction only by the ratchet type tooth surface. Leveling roll power shut-off device, characterized in that.