JP2019135063A - Rolling device - Google Patents

Abstract

To provide a rolling device adaptable to a diversity of rolling processes by a simple constitution.SOLUTION: A rolling device 1 comprises two stands 30 for holding both ends of rolling mill rolls 10 and 20, respectively, a first hydraulic cylinder 120 for moving at least one of the two stands 30, and a second hydraulic cylinder 130 for adjusting a space between the two stands 30.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a rolling apparatus.

  Patent Document 1 uses a hole roll having a plurality of types of hole molds (for example, a centering hole mold, a widening hole mold, a groove erase hole mold, and a modeling hole mold) arranged in the axial direction, and the hole roll. A rolling method is disclosed. In this rolling method, rolling using the same hole roll is repeated while changing the hole mold to be used.

JP 2002-45902 A

  When performing various rolling processes with the same rolling apparatus, the configuration of the rolling apparatus tends to be complicated. For example, as exemplified in Patent Document 1, when rolling is repeated using the same roll while changing the hole type to be used, in addition to the mechanism for feeding the work along the direction orthogonal to the roll, the direction along the roll A mechanism for shifting the position of the workpiece along the line is required.

  Therefore, an object of the present disclosure is to provide a rolling apparatus that can be applied to various rolling processes with a simple configuration.

  A rolling device according to one aspect of the present disclosure includes two stands that respectively hold both ends of a rolling roll, a first hydraulic cylinder that moves at least one of the two stands, and a second that adjusts the interval between the two stands. A hydraulic cylinder.

  According to this rolling apparatus, both the position of the two stands and the interval between the two stands can be adjusted by the combination of the first hydraulic cylinder and the second hydraulic cylinder. For example, the positions of the two stands can be adjusted by operating the first hydraulic cylinder while keeping the distance between the two stands by the second hydraulic cylinder. In addition, by operating both the first hydraulic cylinder and the second hydraulic cylinder, the distance between the two stands can be adjusted at a desired position. Therefore, it can be applied to various rolling processes with a simple configuration.

  The rolling machine includes a third hydraulic cylinder that is linked to the first hydraulic cylinder, a hydraulic circuit that transmits hydraulic pressure from the third hydraulic cylinder to the second hydraulic cylinder, and the power of the first hydraulic cylinder through the third hydraulic cylinder. You may further provide the switching part which switches the 1st state transmitted to a 2 hydraulic cylinder, and the 2nd state where the motive power of a 1st hydraulic cylinder is not transmitted to a 2nd hydraulic cylinder. In this case, one hydraulic pressure source can be shared for the movement of the stand by the first hydraulic cylinder and the width adjustment of the two stands by the second hydraulic cylinder. Therefore, it is adaptable to various rolling processes with a simpler configuration.

  The switching unit includes a valve that shuts off the hydraulic circuit in the second state, a bypass circuit that returns the hydraulic pressure from the third hydraulic cylinder to the third hydraulic cylinder in the second state, and a valve that shuts off the bypass circuit in the first state. You may have. In this case, the first state and the second state can be easily switched by opening and closing the valve.

  The switching unit may have a release mechanism that releases the interlock between the first hydraulic cylinder and the third hydraulic cylinder in the second state.

  According to the present disclosure, it is possible to provide a rolling apparatus that can be applied to various rolling processes with a simple configuration.

It is a front view of a rolling device. It is a side view which follows the II-II line | wire in FIG. It is a schematic diagram which shows the structure of a position and width adjustment part. It is a schematic diagram which shows position adjustment operation | movement. It is a schematic diagram which shows width adjustment operation | movement. It is a schematic diagram which shows the modification of a position and width adjustment part. It is a schematic diagram which shows position adjustment operation | movement. It is a schematic diagram which shows width adjustment operation | movement.

  Hereinafter, embodiments will be described in detail with reference to the drawings. In the description, the same elements or elements having the same functions are denoted by the same reference numerals, and redundant description is omitted.

  A rolling device 1 shown in FIGS. 1 and 2 is a device that forms a slab into a shaped steel (for example, H-shaped steel) by rolling, for example. Hereinafter, the slab before molding, the mold steel after molding, and the molded body in an intermediate state thereof are all referred to as “work”. The rolling apparatus 1 includes rolling rolls 10 and 20 that are parallel to each other, two stands 30, torque transmission units 50 and 60, and a position / width adjusting unit 100.

  The rolling rolls 10 and 20 are arranged so as to be lined up and down. The rolling roll 10 is in contact with the work, and the rolling roll 20 is in contact with the work. In the following, “left and right” means a direction in which one end side of the rolling rolls 10 and 20 (for example, the left side in FIG. 1) is “left” and the other end side of the rolling rolls 10 and 20 is “right”. The rolling roll 10 includes a roll main body 11 extending in the left-right direction, a roll neck 12 extending further left from the left end of the roll main body 11, and a roll neck 13 extending further right from the right end of the roll main body 11. The rolling roll 20 includes a roll body 21 that extends in the left-right direction, a roll neck 22 that extends further to the left from the left end of the roll body 21, and a roll neck 23 that extends further to the right from the right end of the roll body 21.

  The two stands 30 hold both end portions of the rolling rolls 10 and 20 in a rotatable manner. For example, the left stand 30 rotatably holds the left roll necks 12 and 22 of the rolling rolls 10 and 20, and the right stand 30 rotatably holds the right roll necks 13 and 23 of the rolling rolls 10 and 20. To do.

  The left stand 30 includes a housing 31, an upper bearing portion 33, a lower bearing portion 34, and a reduction device 32. The housing 31 surrounds the roll necks 12 and 22. The upper bearing portion 33 rotatably holds the roll neck 12 of the rolling roll 10 in the housing 31. The lower bearing portion 34 rotatably holds the roll neck 22 of the rolling roll 20 in the housing 31. The reduction device 32 is, for example, a hydraulic cylinder, and applies a downward force to the upper bearing portion 33. The reduction device 32 is mounted on the housing 31 and has a reduction rod 35 protruding into the housing 31. The lower end portion of the reduction rod 35 is connected to the upper portion of the upper bearing portion 33.

  The right stand 30 is configured similarly to the left stand 30. The upper bearing portion 33 of the right stand 30 rotatably holds the roll neck 13 of the rolling roll 10. The lower bearing portion 34 of the right stand 30 rotatably holds the roll neck 23 of the rolling roll 20. Hereinafter, as necessary, the left stand 30 is referred to as a stand 30A, and the right stand 30 is referred to as a stand 30B.

  The torque transmission unit 50 transmits torque to the rolling roll 10 while allowing movement of the rolling roll 10 in the axial direction of the rolling roll 10 (direction along the central axis of the rolling roll 10). For example, the torque transmission unit 50 includes a spindle 51 and a joint 52. The spindle 51 is connected to a power source such as an electric motor, for example, and transmits torque from the power source to the vicinity of the roll neck 13 of the rolling roll 10. The joint 52 is a universal joint, for example, and transmits the torque transmitted by the spindle 51 to the rolling roll 10. The joint 52 is connected to the roll neck 13 so as to allow movement of the rolling roll 10 in the axial direction. A specific example of the connection structure that allows the movement of the rolling roll 10 in the axial direction is a coupling structure that can slide along the axial direction. The joint 52 is connected to the roll neck 13 by a non-destructive and detachable fixing method such as bolt fastening.

  The torque transmission unit 60 transmits torque to the rolling roll 20 while allowing movement of the rolling roll 20 in the axial direction of the rolling roll 20 (direction along the central axis of the rolling roll 20). For example, the torque transmission unit 60 includes a spindle 61 and a joint 62 similar to the spindle 51 and the joint 52. The spindle 61 is connected to a power source such as an electric motor, for example, and transmits torque from the power source to the vicinity of the roll neck 23 of the rolling roll 20. The joint 62 transmits the torque transmitted by the spindle 61 to the rolling roll 20.

  The position / width adjusting unit 100 adjusts the position and interval between the two stands 30. As shown in FIG. 3, the position / width adjusting unit 100 includes a first hydraulic cylinder 120, a second hydraulic cylinder 130, a third hydraulic cylinder 140, a connecting member 150, a hydraulic pump 160, a hydraulic circuit 161, 162, a switching unit 170, and a plurality of guide rod units 180.

  The first hydraulic cylinder 120 moves at least one of the two stands 30. The first hydraulic cylinder 120 is disposed outside the two stands 30 in the left-right direction, and moves the stand 30 located proximally. As an example, the first hydraulic cylinder 120 is disposed to the left of the left stand 30A, and moves the stand 30A. The first hydraulic cylinder 120 has a cylinder tube 121, a piston 122, and a piston rod 123.

  The cylinder tube 121 is fixed to the column 110 and the like in a state along the left-right direction. The piston 122 is disposed in the cylinder tube 121 so as to be movable in the left-right direction, and partitions the cylinder tube 121 into a left space 121a and a right space 121b. The piston rod 123 protrudes from the center of the piston 122 in the left-right direction. The right end portion of the piston rod 123 protrudes outside the cylinder tube 121 and is connected to the housing 31 of the stand 30A. The left end portion of the piston rod 123 also protrudes outside the cylinder tube 121.

  The second hydraulic cylinder 130 adjusts the interval between the two stands 30. The second hydraulic cylinder 130 may be provided on any of the two stands 30. For example, the second hydraulic cylinder 130 is provided on the stand 30 (for example, the left stand 30 </ b> A) that is proximal to the first hydraulic cylinder 120. The second hydraulic cylinder 130 has a cylinder tube 131, a piston 132, and a piston rod 133.

  The cylinder tube 131 is fixed to the upper part of the housing 31 of the stand 30A in a state along the left-right direction. The piston 132 is disposed in the cylinder tube 131 so as to be movable in the left-right direction, and partitions the cylinder tube 131 into a left space 131a and a right space 131b. The piston rod 133 protrudes from the center of the piston 132 in the left-right direction. The right end portion of the piston rod 133 protrudes outside the cylinder tube 131 and is connected to the upper portion of the housing 31 of the stand 30B.

  The third hydraulic cylinder 140 is disposed so as to interlock with the first hydraulic cylinder 120. For example, the third hydraulic cylinder 140 is disposed in parallel with the first hydraulic cylinder 120. The third hydraulic cylinder 140 has a cylinder tube 141, a piston 142, and a piston rod 143.

  The cylinder tube 141 is disposed in parallel with the cylinder tube 121 of the first hydraulic cylinder 120, and is fixed to the column 110 or the like. The piston 142 is arranged in the cylinder tube 141 so as to be movable in the left-right direction, and divides the cylinder tube 141 into a left space 141a and a right space 141b. The piston rod 143 protrudes in the left-right direction from the center portion of the piston 142, and the right end portion and the left end portion of the piston rod 143 protrude outside the cylinder tube 141. The left end of the piston rod 143 is connected to the left end of the piston rod 123 by a connecting member 150. Accordingly, the piston rod 143 and the piston 142 of the third hydraulic cylinder 140 are interlocked with the piston rod 123 and the piston 122 of the first hydraulic cylinder 120.

  The hydraulic pump 160 generates power in the first hydraulic cylinder 120 by pumping hydraulic oil. The hydraulic circuit 161 connects the space 121 a and the space 121 b of the first hydraulic cylinder 120 via the hydraulic pump 160. The hydraulic circuit 161 includes pipelines 161a and 161b. The pipe line 161a connects the space 121a and the hydraulic pump 160. The pipe line 161b connects the space 121b and the hydraulic pump 160.

  The hydraulic circuit 162 transmits hydraulic pressure from the third hydraulic cylinder 140 to the second hydraulic cylinder 130. The hydraulic circuit 162 includes pipelines 162a and 162b. The pipelines 162a and 162b are piped so that the second hydraulic cylinder 130 moves the stand 30B closer to the stand 30A when the first hydraulic cylinder 120 operates in a direction to move the stand 30A to the distal side. For example, the pipe line 162 a connects the space 141 a of the third hydraulic cylinder 140 and the space 131 a of the second hydraulic cylinder 130. The pipe line 162b connects the space 141b of the third hydraulic cylinder 140 and the space 131b of the second hydraulic cylinder 130.

  The switching unit 170 includes a first state in which the power of the first hydraulic cylinder 120 is transmitted to the second hydraulic cylinder 130 via the third hydraulic cylinder 140, and a first state in which the power of the first hydraulic cylinder 120 is not transmitted to the second hydraulic cylinder 130. Switch between two states. For example, the switching unit 170 includes valves 172 and 173, a bypass circuit 171, and a valve 174. The valves 172 and 173 open the hydraulic circuit 162 in the first state and shut off the hydraulic circuit 162 in the second state. For example, the valves 172 and 173 are provided in the pipe lines 162a and 162b, respectively, and open and close the flow paths in the pipe lines 162a and 162b. Note that the switching unit 170 may have at least one of the valves 172 and 173.

  A plurality of (for example, four) guide rod units 180 are arranged at the four corners of the housing 31 (see FIG. 2). Each guide rod unit 180 extends in the left-right direction between the two stands 30 and connects the left and right housings 31 to each other. The plurality of guide rod units 180 keep the housings 31 parallel to each other while allowing the interval between the housings 31 to be changed. Each guide rod unit 180 has a built-in lock mechanism (not shown). The lock mechanism allows the interval between the housings 31 to be changed (hereinafter referred to as “free state”) and between the housings 31. It is possible to switch between a state in which the interval cannot be changed (hereinafter referred to as a “lock state”).

  The bypass circuit 171 returns the hydraulic pressure from the third hydraulic cylinder 140 to the third hydraulic cylinder 140 in the second state. The bypass circuit 171 includes a pipe line 171a. The pipe line 171 a connects the pipe lines 162 a and 162 b between the valves 172 and 173 and the third hydraulic cylinder 140.

  The valve 174 blocks the bypass circuit 171 in the first state and opens the bypass circuit 171 in the second state. For example, the valve 174 is provided in the pipe line 171a, and opens and closes the flow path in the pipe line 171a.

  According to the position / width adjusting unit 100, with the distance between the two stands 30 fixed, an operation of moving the two stands 30 in the same direction (hereinafter referred to as “operation in a position change mode”), two Both of the operations for changing the interval between the two stands 30 (hereinafter referred to as “operation in the width change mode”) can be executed.

  As shown in FIG. 4, in the operation in the position change mode, the switching unit 170 is set to the second state (the valves 172 and 173 are closed and the valve 174 is opened), the guide rod unit 180 is set to the locked state, and the hydraulic pump The piston 122 of the first hydraulic cylinder 120 is moved by 160. Thereby, the stand 30 </ b> A connected to the piston rod 123 moves. In conjunction with the movement of the piston 122, the piston 142 of the third hydraulic cylinder 140 also moves. However, the hydraulic oil pushed out from the piston 142 does not pass through the second hydraulic cylinder 130 but passes through the bypass circuit 171. To reflux. For this reason, the second hydraulic cylinder 130 does not operate, and the interval between the two stands 30 is kept constant. Accordingly, the stand 30B also moves with the stand 30A.

  As shown in FIG. 5, in the operation in the width change mode, the switching unit 170 is set to the first state (the valves 172 and 173 are opened and the valve 174 is closed), the guide rod unit 180 is set to the free state, and the hydraulic pump The piston 122 of the first hydraulic cylinder 120 is moved by 160. Thereby, the stand 30 </ b> A connected to the piston rod 123 moves. In conjunction with the movement of the piston 122, the piston 142 of the third hydraulic cylinder 140 also moves. The hydraulic oil pushed out from the piston 142 is sent to the second hydraulic cylinder 130 by the hydraulic circuit 162 to move the piston 132. Thereby, the space | interval of the two stands 30 is changed. The positions of the two stands 30 after the interval change can be adjusted as appropriate by executing the operation of the position change mode again.

  The switching unit 170 is not limited to the configuration described above. The switching unit 170 may be configured in any way as long as it can switch between the first state and the second state. For example, the switching unit 170A illustrated in FIG. 6 includes a release mechanism 175 instead of the valves 172, 173, 174 and the bypass circuit 171 described above. The release mechanism 175 is provided on the connecting member 150 and releases the interlock between the first hydraulic cylinder 120 and the second hydraulic cylinder 130 in the second state. For example, the release mechanism 175 can be configured to release at least one of the connection between the connecting member 150 and the piston rod 123 and the connection between the connecting member 150 and the piston rod 143 by removing a bolt or releasing the clamp mechanism. Has been. Also with this configuration, both the operation in the position change mode and the operation in the width change mode can be executed.

  As shown in FIG. 7, in the operation in the position change mode, the switching unit 170A is in the second state (the connection between the connecting member 150 and the piston rod 123 or the connection between the connecting member 150 and the piston rod 143 is released). Then, the guide rod unit 180 is locked, and the piston 122 of the first hydraulic cylinder 120 is moved by the hydraulic pump 160. Thereby, the stand 30 </ b> A connected to the piston rod 123 moves. Since the piston 142 does not move, the power of the first hydraulic cylinder 120 is not transmitted to the second hydraulic cylinder 130. For this reason, the second hydraulic cylinder 130 does not operate, and the interval between the two stands 30 is kept constant. Accordingly, the stand 30B also moves with the stand 30A.

  As shown in FIG. 8, in the operation in the width change mode, the switching unit 170A is in the first state (the connection member 150, the piston rod 123 and the piston rod 143 are connected), and the guide rod unit 180 is in the free state. The piston 122 of the first hydraulic cylinder 120 is moved by the hydraulic pump 160. Thereby, the stand 30 </ b> A connected to the piston rod 123 moves. In conjunction with the movement of the piston 122, the piston 142 of the third hydraulic cylinder 140 also moves. The hydraulic oil pushed out from the piston 142 is sent to the second hydraulic cylinder 130 by the hydraulic circuit 162 to move the piston 132. Thereby, the space | interval of the two stands 30 is changed.

  As described above, the rolling apparatus 1 includes the two stands 30 that respectively hold both ends of the rolling rolls 10 and 20, the first hydraulic cylinder 120 that moves at least one of the two stands 30, and the two stands. And a second hydraulic cylinder 130 that adjusts the interval of 30.

  According to the rolling device 1, both the position of the two stands 30 and the interval between the two stands 30 can be adjusted by the combination of the first hydraulic cylinder 120 and the second hydraulic cylinder 130. For example, the position of the two stands 30 can be adjusted by operating the first hydraulic cylinder 120 while keeping the distance between the two stands 30 by the second hydraulic cylinder 130. In addition, by operating both the first hydraulic cylinder 120 and the second hydraulic cylinder 130, the distance between the two stands 30 can be adjusted at a desired position. Therefore, it can be applied to various rolling processes with a simple configuration. For example, the use part (part in contact with the work) of the rolls 10 and 20 can be changed without shifting the position of the work in the axial direction of the work rolls 10 and 20. Moreover, various rolling rolls 10 and 20 having different lengths can be used by adjusting the width.

  The rolling device 1 includes a third hydraulic cylinder 140 that is linked to the first hydraulic cylinder 120, a hydraulic circuit 162 that transmits hydraulic pressure from the third hydraulic cylinder 140 to the second hydraulic cylinder 130, and the power of the first hydraulic cylinder 120 is the first. And a switching unit 170 that switches between a first state that is transmitted to the second hydraulic cylinder 130 via the three hydraulic cylinders 140 and a second state in which the power of the first hydraulic cylinder 120 is not transmitted to the second hydraulic cylinder 130. May be. In this case, one hydraulic pressure source can be shared for the movement of the stand 30 by the first hydraulic cylinder 120 and the width adjustment of the two stands 30 by the second hydraulic cylinder 130. Therefore, it is adaptable to various rolling processes with a simpler configuration.

  The switching unit 170 includes valves 172 and 173 that shut off the hydraulic circuit in the second state, a bypass circuit 171 that returns the hydraulic pressure from the third hydraulic cylinder 140 to the third hydraulic cylinder 140 in the second state, and a bypass in the first state. A valve 174 that shuts off the circuit may be included. In this case, the first state and the second state can be easily switched by opening and closing the valves 172, 173, and 174.

  The switching unit 170 may include a release mechanism 175 that releases the interlock between the first hydraulic cylinder 120 and the third hydraulic cylinder 140 in the second state.

  Although the embodiment has been described above, the present invention is not necessarily limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  DESCRIPTION OF SYMBOLS 1 ... Rolling apparatus, 10, 20 ... Roll, 30, 30A, 30B ... Stand, 120 ... First hydraulic cylinder, 130 ... Second hydraulic cylinder, 140 ... Third hydraulic cylinder, 170 ... Switching part, 171 ... Bypass circuit 172, 173, 174... Valve, 175.

Claims (4)

Two stands each holding both ends of the rolling roll,
A first hydraulic cylinder for moving at least one of the two stands;
A rolling device comprising: a second hydraulic cylinder that adjusts an interval between the two stands. A third hydraulic cylinder linked to the first hydraulic cylinder;
A hydraulic circuit for transmitting hydraulic pressure from the third hydraulic cylinder to the second hydraulic cylinder;
Switching between a first state in which the power of the first hydraulic cylinder is transmitted to the second hydraulic cylinder via the third hydraulic cylinder and a second state in which the power of the first hydraulic cylinder is not transmitted to the second hydraulic cylinder The rolling device according to claim 1, further comprising a section. The switching unit is
A valve that shuts off the hydraulic circuit in the second state;
A bypass circuit for returning the hydraulic pressure from the third hydraulic cylinder to the third hydraulic cylinder in the second state;
The rolling apparatus according to claim 2, further comprising a valve that shuts off the bypass circuit in the first state.   The rolling device according to claim 2, wherein the switching unit includes a release mechanism that releases the interlock between the first hydraulic cylinder and the third hydraulic cylinder in the second state.

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