KR200181437Y1 - Apparatus for controlling the pressure of the pinch roll - Google Patents

Abstract

The present invention is a device for adjusting the pressing force of the pinch roll consisting of a lower roll that is supported by both ends to be rotatable by a first support block and an upper roll that is supported by both ends to be rotatable by a second support block and capable of vertical flow. According to the present invention, the pinch roll pressing force adjusting device includes a screw engaging portion screwed to an upper portion of the first support block, a head having a flat upper surface positioned on an upper portion of the screw engaging portion, and a lower portion of the screw engaging portion. It is made of a circular shaft portion and characterized in that it comprises a screw shaft interposed between the first support block and the second support block, the poor progress of the thin steel plate due to the imbalance of the pinch roll and poor pressing force (unbalanced pressing force imbalance) To solve the problems of automatic welding failure at the entrance of each facility of cold rolling mill that produces final products. It is possible to reduce the reprocessing of the final product by keeping the finished product in good condition.

Description

Pinch Roll Pressure Adjusting Device {Apparatus for controlling the pressure of the pinch roll}

The present invention relates to a device for adjusting the pressing force of the pinch rolls used in the production line of the cold rolling mill, and in particular, to improve the quality of the final product and the post-treatment process by adjusting and securing the balance and equal reduction force of the pinch rolls. The present invention relates to a pinch roll reduction force adjusting device capable of reducing energy consumption.

In general, the cold rolling mill of the iron and steel equipment consists of production lines such as continuous annealing line, electroplating line (EGL), continuous plating line (CGL), etc. Rubber pinch rolls are used to advance steel sheets having a relatively thin thickness by rotational force.

That is, in the pinch rolls such as pinch rolls, winger rolls, snubber rolls, etc. used in the production line of the cold rolling mill, as shown in Figure 1, the reduction by the air cylinder (11) Force and rotational force by the electric motor 12 do not sag the relatively thin thicknessless strip (for example, 0.15 mm to 2.5 mm) without tension and the conveyed material does not move from side to side. To be moved in a line center direction.

In such a pinch roll, after adjusting the horizontal level of the bottom roll 14, which is supported at both ends to be fixed and rotatable, the top roll 16 which flows up and down is left and right bearing block 17 , 18) by adjusting the air cylinder rods 11a and 11b to the upper part of the base frame of each other and adjusting the left and right air pressures and the speed adjusting valves of about 0.5 kg / cm 2 to 4 kg / cm 2, thereby adjusting the left and right balance. As used, the iron plate is transferred between the upper roll 16 and the lower roll 14.

However, as the upper roll frequently flows up and down, the rod friction force of the cylinder changes, the environment and temperature change, and the weight of the joint (for example, ball joint, oil joint, gear fastening member, etc.) connected to the motor side changes. Since the left and right balance of the upper roll is easily disturbed, the pressing force or the pressing force of the iron plate is changed, so that the thin iron plate to be transferred cannot be moved in a straight line direction.

As a result, on the input side of each facility of the cold rolling mill, automatic welding failure (camber welding) occurs in which the rear end portion of the preceding iron plate and the front portion of the subsequent iron plate are not aligned, and the iron plate is broken by the steel plate tension. In addition, the winding state of the upper end and the lower end of the final product is poor, and the subsequent processing is performed to unwind and rewind the wound product.

In order to solve the conventional problems as described above, the present invention improves the progress stability of the thin steel sheet by adjusting and securing the balance and equal rolling force of the roll, when transporting the thin steel sheet by the pinch roll to each cold rolling mill It can improve the quality of the final product and reduce the energy required for the post-treatment process by improving the stability of the final welding state of each cold-rolling plant exit facility and reducing the operation stop and post-treatment process. The purpose of the present invention is to provide a pinch roll pressing force adjusting device.

According to the present invention, in order to achieve the above object, both ends are supported and the upper and lower flow is rotatable by the lower roll and the pair of second support blocks that are supported at both ends to be rotatable by a pair of first support blocks. Apparatus for adjusting the pressing force of the pinch roll consisting of the upper roll is a screw coupling portion screwed to the upper portion of the first support block, a head portion having a flat upper surface located on the screw coupling portion, and the screw coupling portion It is made of a circular shaft portion located in the lower portion is characterized in that the screw shaft interposed between the first support block and the second support block.

According to one embodiment of the present invention, between the screw engaging portion and the head is characterized in that the upper and lower level adjustment portion of the hexagonal shape for rotating the screw shaft is formed.

1 is a view schematically showing a configuration of a general pinch roll.

Figure 2 is a view schematically showing a pinch roll is installed a reduction force adjusting device according to the present invention.

Figure 3 is an exploded coupling view of the support block mounted to one end of the lower roll according to an embodiment of the present invention.

Figure 4 is a partial cross-sectional view of the support block is coupled to the screw shaft in accordance with an embodiment of the present invention.

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

20: pinch roll

22: first block

24: 2nd block

30: screw shaft

32: screw connection

34: head

36: round shaft

38: up and down level adjustment unit

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

Referring first to Figure 2, in accordance with an embodiment of the present invention both ends rotatably supported by the first block 22 and rotatably by the upper roll 21 and the second block 24 which is vertically flowable. In order to adjust the pushing force of the pinch roll 20 having the lower roll 23 supported at both ends, it is screwed to an upper portion of the second block 24 rotatably supporting both ends of the lower roll 23. It consists of a screw shaft 30 interposed between the first block 22 and the second block 24.

The rod portion 11a of the air cylinder 11 is connected to the upper portion of the first block 22 to adjust the pressing force of the upper roll 21. That is, the upper roll 21 is moved up and down by the operation of the air cylinder (11). In addition, since the motor connecting portion of one end of the upper roll 21 is connected to the motor, the upper roll 21 is rotated by the driving of the motor. At this time, when the upper roll 21 is moved downward and pressed to the lower roll 23, the pressing force by the upper roll 21 is adjusted by the screw shaft 30.

Meanwhile, as shown in FIG. 3, bearings B, which support both ends of the lower roll 23, are mounted on both sides of the second block 24 rotatably supporting the lower roll 23. The mounting opening 24a penetrates and is formed. The upper part of the second block 24 is formed with a screw insertion hole 24b in which female threads are processed so that the screw shaft 30 for adjusting the pressing force of the pinch roll 20 is screwed.

At this time, the female thread processed in the screw insertion hole (24b) of the cold rolling mill that the compressive strength of the air cylinder 11, the number of threads and the shaft diameter (DIA) is pressed down from the top, for example 0.5kg / ㎠ to about 4㎏ / ㎠ Pinch rolls are processed to a size that can withstand the air pressure of the air cylinder. Meanwhile, the length of the screw coupling portion 32 of the screw shaft 30 screwed to the female thread is also leveled so that the stroke of the rubber pinch roll that is pressed after contacting the center of the upper roll 21 and the lower roll 23 is reduced. Since the crown amount of the upper roll and the lower roll is very small, such as 5 mm to 7 mm, the end of the length of the circular shaft 36 does not contact the lower end of the shaft hole 24c even when the upper roll 21 moves downward. Adjust the length of the screw shaft 30 and the length of the circular shaft 36 so as not to.

And the shaft hole 24c which has a big tolerance is processed in the lower end of the screw insertion port 24b so that the circular shaft 36 formed in the lower part of the screw shaft 30 may fit. In addition, one side of the second block 24 corresponding to the shaft hole 24c is penetrated to the hole 24c so that the female screw portion 24d is machined so that the fixing bolt 1 can be screwed together.

Further, between the screw insertion hole 24b and the shaft hole 24c, a screw fastening portion 24e to which the screw engaging portion 32 formed on the outer circumferential surface of the screw shaft 30 is fastened is machined, and the screw fastening portion 24e is processed. One side of the second block 24 corresponding to) is provided with a grease supply port 24f in which a grease feeder 2 for supplying grease to the screw fastening portion 24e is mounted.

The head 34 of the upper portion of the screw shaft 30 is generally circular, and a groove is formed on the surface of the screw shaft 30 by grooves or knurling, so as to be in contact with the surface and the lower portion of the first block 22 in contact therewith. Lubricant is supplied in between to reduce the compression suction force so that the first block 22 is easily separated from the surface.

On the other hand, by using a fastening tool such as a spanner (spanner) by rotating the screw shaft 30, the head and screw coupling portion 32 of the screw shaft 30 to adjust the upper and lower levels of the screw shaft 30 Between the upper and lower level adjustment portion 38 is generally formed in a hexagonal shape.

Therefore, according to the present invention, when the upper roll 21 pressed down by the air cylinder 11 is moved downward, the one-side crown, that is, the circular crown and the tapered crown are kept at 0.5 mm to 2 mm, and the upper roll ( Taking into account the size of the crown, that is, the gap between the lower roll 23 and the lower roll 23, the pressure of the air cylinder and the cap of the air cylinder is checked by checking the pressing state of the steel plate pressed between the upper roll 21 and the lower roll 23. Determine the size of.

At this time, the pressing force of the pinch roll is determined by the air cylinder pressure, but depending on the thickness and width of the thin steel strips of each cold rolling mill, the pressure is reduced so as not to cause slippage of the steel sheets or release of rubber coated on the rolls. Should be set.

After setting the pressure, the vertical movement speed of the left and right air cylinders is adjusted, and the upper roll (flow roll) is moved downward to set the moment at which the upper roll 21 and the lower roll 23 come into contact with each other. Then, the size of the gap is checked by repeatedly pressing the pinch roll by the air-pressing force while operating the air cylinder up and down, and the top and bottom of the screw shaft 30 provided in the second block 24 of the left and right lower rolls. The level adjuster 38 is rotated with a spar to precisely adjust the upper and lower pinch roll gaps on the right and left sides of the block. Thereafter, by fixing the circular shaft 36 with the fixing bolt (1) to fix the position of the screw shaft 30, the pinch roll balance of the left and right and the pressure reduction force state is maintained.

On the other hand, even if the air pressure is increased to about 0.5 kg / cm 2 to 1 kg / cm 2 than before, the pressing area (length) does not increase, but the pressing force is increased, thereby reducing the slip phenomenon of the steel sheet and increasing the compression rotational force.

Therefore, according to the present invention, by adjusting the pressing force of the pinch rolls, each cold rolling mill equipment that solves the progression of the thin steel sheet due to the unbalance of the pinch rolls and the poor pressing force (unbalanced pressing force), and also produces the final product It can eliminate the trouble of automatic welding defect at the entrance side and keep the finished product in good condition and reduce the reprocessing of the final product.

The foregoing is merely illustrative of a preferred embodiment of the present invention as those skilled in the art to which the present invention pertains can make modifications and changes to the present invention without departing from the spirit and gist of the present invention described in the appended claims. have.

Claims (2)

For adjusting the pressing force of the pinch roll, which is composed of a lower roll having both ends rotatably supported by a pair of first supporting blocks and an upper roll supported at both ends so as to be rotatable by a pair of second supporting blocks and capable of vertical flow. In the apparatus, A screw coupling portion screwed to an upper portion of the first support block, a head portion positioned on the screw coupling portion and having a flat upper surface, and a circular shaft portion positioned below the screw coupling portion, wherein the first support Pinch roll reduction force adjusting device comprising a screw shaft interposed between the block and the second support block. The pinch roll pressing force adjusting device of claim 1, wherein a hexagonal upper and lower level adjustment part is formed between the screw coupling part and the head part to rotate the screw shaft.