KR200204805Y1 - Mandrel for grinding back up roll of rolling mill - Google Patents

Abstract

An object of the present invention is to provide a centering device for grinding a reinforcing roll of a cold rolling mill to improve the product quality by accurately aligning the center axis of the reinforcing roll and the axis for reinforcing roll grinding.

The present invention has a mandrel shaft constituting the center of the rotation axis of the reinforcement roll, the mandrel shaft fixed to one side and the inner frame is fitted to the reinforcement roll, the conical cone member is installed on the outside and slides to the mandrel shaft slidably The fixed cylinder is covered with a member, the outer side of the operation member and bolted to the circular frame, the T slot is formed to a certain depth along the axial direction of the outer surface of the cone member, the inner end is inserted into the T slot and slides, the outer end is formed on the fixed cylinder side A close contact member which protrudes through the long hole and adheres to the inner side of the reinforcement roll, a cover which is installed at the tip of the fixing cylinder and is supported at the tip of the operating member through a hole formed in the center, and a nut that is fitted to the male screw formed on the outer peripheral surface of the end of the operating member from the outside of the cover Rotation knobs for rotating the nut member by being fastened to the outside of the member and the nut member, It provides a device for the centering of the reinforcing rolls cold rolling mill grinding consisting of a clamping member fastened to an annular groove formed in the de relchuk.

Description

Centering device for grinding reinforcement roll of cold rolling mill {Mandrel for grinding back up roll of rolling mill}

The present invention relates to a reinforcement roll installed in a stainless steel cold rolling mill, and more particularly, to a centering device for grinding a reinforcement roll, which allows the center of a reinforcement roll to be accurately aligned during a reinforcing roll surface polishing operation.

In general, hot rolled coils, which have been hot rolled in stainless steel production, are cold rolled again to meet the demands of the users, thereby making them beautiful in appearance and accurate in size.

As shown in FIG. 1, the cold rolling line includes a payload reel 110 in which a rolling body 100 in which rolling is performed and hot rolled coils 150 wound on hot rolling are installed on left and right sides of the rolling mill body 100. In the rolling mill main body 100, a work roll 101, a reinforcement roll 103, and an intermediate roll 102 are continuously installed to transmit pressure step by step to finally strip continuous thickness by the work roll 101. It has a structure in which rolling is performed.

Here, the reinforcement roll 103 is for applying pressure to the work roll 101, the eccentric gear 107, the reinforcement roll 103 and the like on the long axis 105, the key 106 is formed as shown in FIG. Many of these are installed in combination and used as a roll concept.

Therefore, when the rack 108 engaged with the eccentric gear 107 is moved up and down, the eccentric gear 107 is rotated so that the reinforcement roll 103 is moved up and down by the amount of eccentricity to apply the overall pressing force or adjust the strip, which is a mailing strip. It is to control the shape on the front.

After the reinforcement rolls are used for a certain period of time, each reinforcement roll is decomposed to remove the surface fatigue layer and then polished.

Here, the most important point in the polishing operation is to exactly match the center of the reinforcement roll with the polishing axis where the reinforcement roll is installed when polishing. If the two center axes do not coincide, the reinforcement roll is eccentrically polished and strips accordingly. Rolling failure will occur.

7 and 8 is a centering device according to the prior art, after coupling the sleeve 122 formed in one side is cut and the inner surface is inclined to the central shaft 120, the cone-shaped mandrel 121 is installed, the reinforcement roll 103 Insert the inside, and the opposite side of the reinforcing roll 103 is inserted into the sleeve 123 and the mandrel 124 of the same shape, and then through the sleeve 123 to the center axis 120 protruding opposite the reinforcing roll 103 ), The nut 125 is fastened.

Therefore, the sleeves 122 and 123, one side of which is cut by the mandrel 121 and 124 pushed into the reinforcement roll 103 by the tightening of the nut 125, are opened and expanded to couple the central axis 120 and the reinforcement roll 103 to each other. It is structure to let.

However, in the above-described conventional structure, the entire portion of the sleeve is inflated at a constant rate so as not to be in close contact with the inner portion of the sleeve in the process of inflating the sleeve to be in close contact with the inner surface of the reinforcement roll. The roll centers do not coincide with each other.

Therefore, the outer surface of the reinforcement roll is not concentrically ground during grinding, and the eccentric reinforcement roll during the rolling operation causes vibrations in the lower rolls, and as a result, fine vibration marks are generated on the strip surface.

In order to solve the above problems, the present invention is designed to grind the reinforcement roll of a cold rolling mill to improve the quality of the product by precisely aligning the center axis of the reinforcement roll and the reinforcement roll grinding shaft. The purpose is to provide a centering device.

1 is a view schematically showing a rolling mill used in general cold rolling,

Figure 2 is a perspective view showing only the reinforcement roll in Figure 1,

Figure 3 is a perspective view showing a centering device for grinding reinforcing rolls according to the present invention,

4 is a configuration diagram of a centering device according to the present invention,

5 is a partial detailed view of FIG. 4 according to the present invention;

6 is a cross-sectional view showing a state of use of the centering device according to the present invention,

Figure 7 is a block diagram showing a centering device for grinding reinforcement rolls according to the prior art,

8 is a cross-sectional view showing a state of use of the centering weight according to the prior art.

Explanation of symbols on the main parts of the drawings

10: mandrel shaft 11: circular frame

12: round flange 13: operating member

14: cone member 15: fixed cylinder

16: T slot 17: T-shaped protrusion

18: close contact member 19: long hole

20: cover 21: nut member

22; Rotary knob 23; Clamping member

24,25 flange 26,27; Annular groove

28: spring

In order to achieve the object as described above, the centering device according to the present invention is such that the reinforcing roll contact member radially protrudes by the same length from the mandrel shaft constituting the center of the rotation axis of the reinforcement roll to the axis center and the mandrel It is characterized by the fact that it is possible to coincide with the center of gravity.

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

FIG. 1 is a view schematically showing a rolling mill used for general cold rolling, and FIG. 2 is a perspective view showing only a reinforcing roll in FIG. 1.

According to the drawing, the cold rolling mill comprises a pay-off reel 110, which is installed on the rolling mill body 100 and the rolling mill body 100 left and right sides of which the rolling is carried out, and the hot rolled coil 150 is wound. The work roll 101, the reinforcement roll 103, and the intermediate roll 102 are continuously installed in the rolling mill main body 100, and the reinforcement roll 103 has an eccentric gear (105) on the long axis 105 having the key 106 formed therein. 107) and a plurality of reinforcement rolls 103 are provided in combination.

3 and 4, the present invention is fixed to the mandrel shaft 10 and the mandrel shaft 10, which forms the center of the rotation axis of the reinforcement roll 103 during grinding, and to the inner surface of the reinforcement roll ( 103) a circular frame 11 having a circular flange 12 fitted on an inner circumferential surface thereof, a conical cone member 14 inclined at a predetermined angle on an outer side thereof, and an operating member 13 slidably fitted to the mandrel shaft 10. ), The fixed cylinder 15, which is covered with the outer side of the operation member 13 and bolted to the circular frame 11, is arranged at an angle along the outer circumferential surface of the cone member 14 and formed to a predetermined depth along the axial direction of the outer circumferential surface T-shaped protrusion 17 is formed so that the slot 16 and the inner end are inserted into the T-slot 16 and slide, and the outer end protrudes through the long hole 19 formed on the side of the fixing tube 15 to reinforce the roll 103. ) Is fastened with a bolt at the tip of the close contact member 18 and the fixed cylinder 15 which are in close contact with the inner side, Cover 20 in which the tip of the actuating member 13 protrudes through the formed hole, and a nut member 21 and a nut member 21 engaged with a male screw formed on the outer peripheral surface of the tip of the actuating member 13 from the outside of the cover 20. To the outer end and the mandrel shaft 10 of the nut member 21 to prevent the rotation knob 22 and the nut member 21 from being disengaged from the mandrel shaft 10. It consists of a clamping member 23 is fastened to the formed annular groove (26, 27).

And between the inner surface of the circular frame 11 and the cone member 14 is provided with an elastic spring 28 to be fitted to the mandrel shaft 10 has a structure for continuously applying the elastic force to the operating member (13).

As shown in FIG. 5, the cone member 14 is installed in two stages of the operating member 13, and the T slots 16 formed on the surface of the cone member 14 are arranged at intervals of 120 ° in three. do. Since the T slot 16 has a predetermined depth along the surface, the diameter of the circle formed by the contact member 18 increases from the upper portion to the lower portion of the contact member 18 fitted to the T slot 16 from the top of the cone member 14. It becomes bigger.

In order to facilitate the rotation of the nut member 21, bearing members 31 and 32 are installed at both ends of the nut member 21 so as to be in close contact with the operating member 13 and the mandrel shaft 10.

On the other hand, the clamping member 23 is separated into two and coupled to each other with a bowl and the inner and outer flanges (24, 25) forming an annular groove on the inner surface of the nut member 21, the outer end and the mandrel shaft (10), respectively. It is fitted to the annular grooves (26, 27) formed in the). Therefore, by the clamping member 23, the nut member 21 can only rotate in place at the current position without falling out of the mandrel shaft 10.

Unexplained reference numeral 30 is installed in the long hole 19 formed in the fixing cylinder 15 is a support member for supporting the close contact member 18 by matching the size of the long hole 19 to the contact member 18 thickness. .

Hereinafter, the operation of the present invention will be described.

First, the reinforcing roll 103 for performing the grinding operation is removed from the long axis, and then the centering device of the present invention is inserted into the reinforcing roll 103.

Therefore, as shown in Figure 6, the circular frame 11 installed on the mandrel shaft 10 is in close contact with the front end of the reinforcement roll 103, the outer side of the circular flange 12 formed on the inner surface of the circular frame 11 Side is mounted in close contact with the inner surface of the reinforcement roll (103).

In this state, when the rotary knob 22 installed on the nut member 21 is rotated, as the nut member 21 rotates, the operating member 13 engaged with the male screw on the inner surface of the nut member 21 is male threaded. The circular frame 11 is moved toward.

That is, the nut member 21 rotates in place while being in close contact with the cover 20 by the clamping member 23, and the operating member 13 engaged with the nut member 21 is the nut member 21. As it slides on the mandrel shaft 10 as it rotates, it is pushed inward.

As the operating member 13 moves, the cone member 14 moves in the same manner. At this time, the contact member 18 fitted in the T slot 16 of the cone member 14 is moved toward the side of the fixing cylinder 15. Since the lifting and lowering is controlled by the formed long hole 19, the contact member 18 moves along the T-slot 16 to the larger diameter of the cone member 14 as the cone member 14 moves. (15) It protrudes outward.

Therefore, as shown in FIG. 6, when the nut member 21 is continuously rotated, the close contact member 18 fitted into the T slot 16 is pushed out by the cone member 14, and finally, the inner surface of the reinforcement roll 103. It will come in close contact.

As such, the locking member installed in the radial direction of the cone member 14 is moved by the same distance to be in close contact with the inner surface of the reinforcement roll 103 so that the center of the mandrel shaft 10 on which the cone member 14 is installed and the center of the reinforcement roll 103 are provided. This can be mutually consistent.

In this state, the grinding operation is performed on the surface of the reinforcement roll 103 using the mandrel shaft 10 as the rotation shaft.

On the other hand, if the rotary knob 22 is reversely rotated after the grinding operation, the operating member 13 is pushed back by the elastic return force of the elastic spring fitted to the mandrel shaft 10, and the cone member 14 is pushed out to bring the contact member into close contact. 18 collects upward along the cone slot 14 along the T-slot 16 of the cone member 14, so that the mandrel shaft 10 is easily reinforced from the reinforcing roll 103 because it is separated from the inner side of the reinforcing roll 103. You can remove it.

According to the centering device according to the present invention as described above, it is possible to reduce the time and effort required to match the center of the mandrel shaft and the reinforcement roll, and to accurately match the center to prevent grinding failure due to eccentricity In addition, there is an effect that can improve the quality of the product.

Claims (3)

When grinding, the mandrel shaft forming the center of the revolving roll and the circular frame fixed to one side of the mandrel shaft, and the inner side is fitted to the inner circumferential surface of the reinforcing roll, and a conical cone member inclined at a predetermined angle on the outer side are slidable to the mandrel shaft. The operation member is fitted to the safety member, the fixed cylinder is covered with the outer member and bolted to the circular frame, the T slot is arranged at a predetermined angle along the outer peripheral surface of the cone member and formed at a predetermined depth along the axial direction of the outer surface, the inner end is the T slot T-shaped projection is formed so as to slide in the outer end is protruding through the long hole formed on the side of the fixed cylinder is in close contact with the inner surface of the reinforcing roll, the fastening member is fastened with a bolt to the end of the fixed cylinder and the operating member through the hole formed in the center The protruding support cover, the nut member to be engaged with the male screw formed on the outer peripheral surface of the front end of the operating member, Reinforcement roll of a cold rolling mill, which consists of a clamping member which is fastened to the outside of the nut member and is rotated to rotate the nut member, and the nut member is fastened to an annular groove formed on the outer end of the nut member and the mandrel shaft to prevent the nut member from being separated from the mandrel shaft. Centering device for grinding The centering device for reinforcing roll grinding of a cold rolling mill according to claim 1, wherein an elastic spring fitted to the mandrel shaft is installed between the inner surface of the circular frame and the cone member to apply an elastic force to the operation member. The centering device for reinforcing roll grinding of a cold rolling mill according to claim 1, wherein the operating member is provided with two stages of cone members, and the T slots formed on the surface of the cone members are arranged at intervals of 120 degrees.