JP2012250254A - Clamping device for rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce working load when performing the maintenance and the replacement of a rolling roll by making easy the position restraint in the axial direction of the rolling roll.SOLUTION: The clamping device 10 for rolling mills includes a pair of clamping tools 23 for restraining the position in the axial direction of a roll chock 16 by pressing both sides in the radical direction of the roll chock 16 and a fastening device 24 which is installed between the pair of the clamping tools 23 and with which the position restraint and the release of the restraint of the roll chock 16 are executed by the pair of the clamping tools 23 by expanding and contracting in the longitudinal direction. The fastening device 24 has an actuator 32 which is provided with a cylindrical cylinder 35 connected to the side of one clamping tool 23 and a piston 36 connected to the side of the other clamping tool 23 and slid in the axial direction of the cylinder in the inside of the cylinder 35 by the pressure of fluid fed into the cylinder 35.

Description

  The present invention relates to a rolling mill clamping device that restrains the axial position of a rolling roll.

In a rolling device that rolls strips such as wire rods, grooves extending in the circumferential direction are formed on the outer peripheral surface of a pair of rolling rolls, and a hole mold that allows the strips to pass through is formed by combining the grooves of the pair of rolling rolls. Has been.
However, when the positions of the pair of rolling rolls are shifted from each other in the axial direction, a step is generated in the hole mold, and it becomes difficult to roll a strip having an appropriate cross-sectional shape. For this reason, various types of clamping devices have been conventionally proposed in which the position of the rolling roll in the axial direction is adjusted and fixed at a predetermined position.

  The following Patent Document 1 discloses a clamp device (caliber aligning device) including a pair of sandwiching portions and one turn buckle. The clamping part of this clamp apparatus is comprised so that a pair of ear | edge part provided in the roll chock which supports the axial end part of a rolling roll may be clamped. The turnbuckle includes a nut member and two bolt members screwed to both ends of the nut member, and the lengthwise outer ends of the bolt members are connected to the clamping portions. And this clamp device positions the roll chock clamped by the clamping part in the axial direction by turning the nut member to expand and contract the turnbuckle, and aligns the concave grooves of the pair of rolling rolls to have an appropriate shape. It is comprised so that the hole type of this may be formed.

Japanese Utility Model Publication No. 1-33321 (FIG. 3)

  The clamping device described in Patent Document 1 requires manual operation of a turnbuckle, that is, an operation of manually turning a nut member in order to position the rolling roll in the axial direction. In order to turn the nut member of the turnbuckle, a large spanner, a hammer or the like is required, and a large operating force is also required. For this reason, there is a disadvantage that the burden on the worker is very large and the work takes a long time. Moreover, since a rolling roll needs regular maintenance and replacement | exchange, a heavy burden is imposed on an operator each time. Furthermore, there is a drawback that the operation amount of the nut member is likely to vary from worker to worker.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to facilitate the positioning (position restraint) of a rolling roll and to reduce the work burden during maintenance and replacement of the rolling roll. And

The present invention includes a pair of clamp tools that hold both sides in the radial direction of a roll chock that rotatably supports a rolling roll and restrains the axial position of the roll chock, and a bridge extending between the pair of clamp tools and in the length direction. It is a clamping device for a rolling mill provided with a fastening tool that performs position restraint and release of the roll chock by a pair of clamping tools by expanding and contracting.
The clamping tool is connected to one clamp tool side, and the other clamp tool side is connected to the other clamp tool side, and the inside of the cylinder is moved in the cylinder axis direction by the pressure of the fluid supplied into the cylinder. It has an actuator part provided with a sliding piston.

  Since the clamping device for a rolling mill of the present invention has an actuator portion including a cylinder and a piston, the tightening tool does not need to manually turn the nut member of the turnbuckle as in the prior art. The fastener can be extended or contracted by supplying fluid to the actuator portion. Therefore, the work of restraining the position of the roll chock or releasing it can be performed in a short time with a small work load. Further, by controlling the amount of fluid supplied to the actuator unit, the amount of expansion and contraction of the fastening tool can be easily made constant, and variations in work for each operator can be suppressed.

The actuator unit includes a first chamber to which a fluid is supplied in order to operate the clamp tool in a direction in which the position of the roll chock is restrained, and a fluid in order to operate the clamp tool in a direction of releasing the position restriction of the roll chock. It is preferable that the second chamber is supplied with a double-acting type provided in the cylinder.
According to this configuration, it is possible to use the pressure of the fluid in both the work for restraining the position of the roll chock and the work for releasing it, and the burden on the operator can be further reduced.

It is preferable that the piston has a pressure receiving area for receiving fluid pressure that is larger in the first chamber than in the second chamber.
According to this configuration, when restraining the position of the roll chock, the position of the roll chock can be firmly restrained by applying a larger force to the clamp tool. In addition, when releasing the position restriction of the roll chock, the reaction force accompanying the position restriction acts on the clamp tool and the fastening tool in advance, so that the position restriction of the roll chock can be easily controlled only by applying a relatively small force to the clamp tool. It can be canceled.

  According to the present invention, the position restraint of the rolling roll and its release can be easily performed, and the work load at the time of maintenance and replacement of the rolling roll can be reduced.

It is a side view of the rolling mill using the clamping device for rolling mills concerning an embodiment of the invention. It is a top view of the clamp apparatus for rolling mills. It is a top view which shows the state which open | released the clamp apparatus for rolling mills. It is a front view (one side sectional view) which expands and shows an actuator part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a rolling mill 11 using a rolling mill clamping device 10 according to an embodiment of the present invention. The rolling mill 11 includes a pair of upper and lower rolling rolls 12, a roll housing 13 that supports each rolling roll 12, and a support frame 14 that supports the upper and lower roll housings 13. The upper and lower rolling rolls 12 have, for example, a diameter of 1100 mm, concave grooves (not shown) such as semi-elliptical shapes are formed on the respective outer peripheral surfaces, and the concave grooves of the upper and lower rolling rolls 12 are aligned with each other to form a wire rod or the like A hole mold for rolling the steel bar is formed.

  An end portion in the axial direction of the rolling roll 12 is rotatably supported by a roll chock 16, and the roll chock 16 is attached to the roll housing 13. A roll chock 16 provided at one end in the axial direction of the rolling roll 12 is fixed to the roll housing 13 in a state where the axial position is constrained by the clamping device 10.

  FIG. 2 is a plan view of the rolling mill clamping device 10. In the following description, with respect to the axial direction of the rolling roll 12, the upper side in FIG. 2 is referred to as the axial inner side, and the lower side in FIG. As shown in FIG. 2, a through hole 18 is formed in the roll housing 13, and a roll chock 16 is inserted into the through hole 18 so as to be slidable in the axial direction. The roll chock 16 is formed in a cylindrical shape, and an end 19 of the rolling roll 12 is rotatably supported in the cylinder via a bearing 17.

  A pair of ears 20 projecting radially outward are formed on both sides of the roll chock 16 in the radial direction. An adjustment bolt 21 that protrudes inward in the axial direction toward the roll housing 13 is screwed to the ear portion 20, and a contacted surface in which the tip of the adjustment bolt 21 is formed in a concave shape in the roll housing 13. It is in contact with 13a. And the axial position of the roll chock 16 and the rolling roll 12 with respect to the roll housing 13 can be adjusted by adjusting the screwing amount of the adjusting bolt 21 with respect to the ear portion 20.

  The clamp device 10 restrains the axial position of the roll chock 16 whose position is adjusted by the adjustment bolt 21 and fixes the roll chock 16 to the roll housing 13. The clamp device 10 includes a pair of clamp tools 23 and a fastening tool 24 that is installed between the pair of clamp tools 23. The pair of clamps 23 are rotatably supported by support members 25 provided on both sides in the radial direction of the through-hole 18 on the axially outer side surface of the roll housing 13 via support shafts 26 in the vertical direction.

  The clamp tool 23 includes a pressing portion 28 that presses the ear portion 20 of the roll chock 16 from the outside in the axial direction, and an arm portion 29 that protrudes with respect to the pressing portion 28 with a substantially 90 degree relationship. Both ends of the fastening tool 24 in the length direction are connected to the tip of the arm portion 29 via a support shaft 30 in the vertical direction. Further, as shown in FIG. 3, the rolling roll 12 can be pulled out from the roll housing 13 in the axial direction by releasing the connection between the arm part 29 of one clamp tool 23 and one end of the fastening tool 24. It is possible.

  As shown in FIG. 2, the fastening tool 24 includes an actuator part 32 and two rod parts 33 connected to both ends of the actuator part 32. The outer end portion in the length direction of each rod portion 33 is connected to the arm portion 29 of each clamp tool 23. For example, the actuator portion 32 has a maximum outer diameter of about 200 mm and a length of about 440 mm, and the rod portion 33 has an outer diameter of about 60 mm. However, the dimension of the actuator part 32 and the rod part 33 is not limited to this. Further, the actuator portion 32 and the rod portion 33 are subjected to surface treatment such as nitriding treatment or hard chrome plating, thereby improving corrosion resistance and preventing rust.

  FIG. 4 is an enlarged front view (one-side sectional view) showing the actuator portion 32. The actuator part 32 has a cylinder 35 and a piston 36. The cylinder 35 includes a cylindrical first cylindrical portion 37 and a cylindrical second cylindrical portion 38 attached to the inner surface of one end portion side (left end portion side in FIG. 4) of the first cylindrical portion 37 in the cylindrical axis direction. And a cylindrical third cylindrical portion 39 attached to the inner surface of the second cylindrical portion 38. A female screw portion 40 is formed on the other end side (right end portion side in FIG. 4) of the first tube portion 37 in the tube axis direction. The female screw portion 40 is connected to the end portion of one rod portion 33. The formed male screw portion 41 is screwed together. Further, a lock nut 42 is screwed into the male screw portion 41 to prevent the male screw portion 41 screwed into the female screw portion 40 from rotating.

  Inside the cylinder of the first cylinder portion 37, an annular protrusion 44 that protrudes radially inward is formed on the right side of the cylinder axis direction in the circumferential direction, and the female screw portion is on the right side of the protrusion 44. 40 is formed. Further, a small diameter portion 45 is formed on the left side of the projecting portion 44 inside the first cylindrical portion 37, and a large diameter portion 46 having a larger inner diameter than the small diameter portion 45 is further provided on the left side via the step portion 47. Is formed.

  A female screw portion 49 is formed at the left end portion of the large diameter portion 46 of the first cylindrical portion 37, and the male screw portion 50 formed on the outer peripheral surface of the second cylindrical portion 38 is screwed into the female screw portion 49. As a result, the second cylinder part 38 is connected to the first cylinder part 37. Two O-rings 51 a and 51 b are provided between the inner peripheral surface of the first cylindrical portion 37 and the outer peripheral surface of the second cylindrical portion 38 with an interval in the cylindrical axis direction.

  The third cylinder part 39 is fitted to the inner peripheral surface of the second cylinder part 38 and the position in the cylinder axis direction is restricted by the retaining ring 53. Two O-rings 54 a and 54 b are provided between the second cylinder portion 38 and the third cylinder portion 39 with a space in the cylinder axis direction, and a seal member is provided on the inner peripheral surface of the third cylinder portion 39. 55 and an O-ring 56 are provided at intervals in the cylinder axis direction. Oil chambers 57 and 58 are formed between the second and third cylindrical portions 38 and 39 and the stepped portion 47 on the inner peripheral side of the first cylindrical portion 37.

  The piston 36 is formed in a cylindrical shape, and a female screw portion 60 is formed on one end side (left end portion side) in the cylindrical axis direction. Then, a male screw portion 61 formed at the end of the other rod portion 33 is screwed into the female screw portion 60. The female screw portion 60 is in a reverse screw relationship with the female screw portion 40 on the opposite side in the axial direction. In addition, a lock nut 62 that stops the rotation of the male screw portion 61 screwed into the female screw portion 60 is screwed into the male screw portion 61.

  An annular partition wall 64 that protrudes outward in the radial direction is formed in the middle portion of the piston 36 in the length direction. The partition wall 64 is disposed in the oil chambers 57 and 58 and divides the oil chamber into a first oil chamber 57 and a second oil chamber 58. An O-ring 65 is provided between the outer peripheral surface of the partition wall portion 64 and the inner peripheral surface of the first tube portion 37. The first cylinder portion 37 of the cylinder 35 has a first supply port 66 for supplying hydraulic oil to the first oil chamber 57, and a second supply port 67 for supplying hydraulic oil to the second oil chamber 58. Is formed. As shown in FIG. 2, the first supply port 66 and the second supply port 67 are connected to a hydraulic pump 69 via an oil pipe 68, and hydraulic oil is supplied from the hydraulic pump 69.

  The piston 36 is slidably fitted to the inner peripheral surface of the third cylindrical portion 39 of the cylinder 35 on the left side of the partition wall portion 64. Further, the piston 36 is slidably fitted to the inner peripheral surface of the small diameter portion 45 of the first cylindrical portion 37 on the right side of the partition wall portion 64. An O-ring 71 is provided between the inner peripheral surface of the small diameter portion 45 and the outer peripheral surface of the piston 36. The seal member 55 and the O-rings 51a, 51b, 54a, 54b, 56, 65, 71 have a function of preventing the hydraulic oil supplied into the first and second oil chambers 57, 58 from leaking outside. And has a function of preventing external moisture such as cooling water from entering the cylinder 35.

  When hydraulic oil is supplied from the first supply port 66 to the first oil chamber 57, the left side surface 64a of the partition wall 64 receives the pressure of the hydraulic oil, and the piston 36 slides in the right direction. At this time, the two rod portions 33 move in a direction approaching each other, and the entire fastening tool 24 contracts. Therefore, as shown in FIG. 2, the pair of clamps 23 rotate in a direction in which the arm portions 29 approach each other, and the pressing portion 28 presses the ear portion 20 of the roll chock 16 to move in the axial direction of the roll chock 16. Constrain the position.

  Conversely, when hydraulic oil is supplied from the second supply port 67 to the second oil chamber 58, the right side surface 64b of the partition wall 64 receives the pressure of the hydraulic oil and the piston 36 moves to the left. Thereby, the two rod parts 33 move in a direction away from each other, and the entire fastening tool 24 is extended. Therefore, as shown in FIG. 2, the pair of clamps 23 rotate in a direction in which the arm portions 29 are separated from each other, the pressing portion 28 is separated from the ear portion 20 of the roll chock 16, and the axial position of the roll chock 16 is reached. Restraint is released.

  And in this state, by removing one rod part 33 from one clamp tool 23, as shown in Drawing 3, a pair of clamp tools 23 are opened and roll chock 16 and rolling roll 12 are pivoted from roll housing 13. Can be extracted outward in the direction.

  As described above, the clamping device 10 according to the present embodiment has a pair of clamping tools 23 and a fastening tool 24 installed on the pair of clamping tools 23, and the fastening tool 24 is made of hydraulic oil. It has an actuator part 32 that expands and contracts in the length direction by pressure. Therefore, it is not necessary to manually turn the nut member of the turnbuckle as in the prior art, and it is possible to reduce the burden of the work of restraining the position of the roll chock 16 in the axial direction and shorten the work time.

Further, since the actuator unit 32 is a double-acting type in which hydraulic oil is supplied in both contraction and extension, not only the work of restraining the position of the roll chock 16 in the axial direction but also the work of releasing the position restraint. It can be done easily.
As shown in FIG. 4, in the partition wall 64 of the piston 36, the areas of the pressure receiving surfaces 64 a and 64 b that receive the hydraulic oil pressure are larger on the first oil chamber 57 side than on the second oil chamber 58 side. ing. Therefore, when the position restriction of the roll chock 16 in the axial direction is performed, a larger force can be applied to the piston 36 to contract the fastening tool 24, and the position restriction of the roll chock 16 can be performed firmly. On the contrary, when the position restriction of the roll chock 16 is released, since the reaction force accompanying the position restriction is applied to the clamp tool 23 and the fastening tool 24, even if the force for extending the fastening tool 24 is relatively small. The clamp tool 23 can be easily rotated.

The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the invention described in the claims.
For example, the pressure receiving area of the piston 36 can be formed to the same dimension. The actuator unit 32 can be a single-acting type instead of a double-acting type. In the case of the single-acting type, it is preferable that the hydraulic pressure is supplied when the position of the roll chock 16 is restricted (when the fastening tool 24 is contracted). However, in the single-acting type, there is a possibility that the piston 36 may move in the reverse direction due to the hydraulic pressure being cut off, and that a large spring or the like is required to extend the fastener 24, It is more preferable that the actuator unit 32 be a double-acting type for the reason that a reliable operation is possible even in a situation where the use environment is poor such as a rolling mill.

  The clamp tool 23 may be configured to restrain the position of the roll chock 16 when the fastening tool 24 is extended, and to release the position restraint of the roll chock 16 when the fastening tool 24 is contracted. The actuator portion 32 of the fastener 24 is not limited to the hydraulic pressure but can supply pressure of other fluids. However, it is more preferable to use the hydraulic pressure in terms of ensuring a higher output and a sufficient stroke. Further, the present invention can be applied not only to a rolling mill for bar steel but also to a rolling mill for sheet material.

DESCRIPTION OF SYMBOLS 10: Clamp apparatus 11: Rolling mill 12: Roll roll 13: Roll housing 16: Roll chock 20: Ear part 23: Clamp tool 24: Fastening tool 32: Actuator part 33: Rod part 35: Cylinder 36: Piston 57: 1st Oil chamber 58: Second oil chamber

Claims (3)

A pair of clamps for restraining the axial position of the roll chock by pressing both sides in the radial direction of the roll chock that rotatably supports the rolling roll, and extending and contracting in the length direction between the pair of clamps A clamping device for a rolling mill provided with a tightening tool that performs position restraint and release of the roll chock by a pair of clamp tools,
The clamping tool is connected to one clamp tool side, and the other clamp tool side is connected to the other clamp tool side, and the inside of the cylinder is moved in the cylinder axis direction by the pressure of the fluid supplied into the cylinder. A clamping device for a rolling mill, comprising: an actuator unit including a sliding piston.   The actuator unit includes a first chamber to which a fluid is supplied in order to operate the clamp tool in a direction in which the position of the roll chock is restrained, and a fluid in order to operate the clamp tool in a direction of releasing the position restriction of the roll chock. The clamping device for a rolling mill according to claim 1, wherein the second chamber is supplied with a second chamber in the cylinder.   3. The clamping device for a rolling mill according to claim 2, wherein the piston is formed such that a pressure receiving area for receiving fluid pressure is larger in the first chamber than in the second chamber.

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