JP4704095B2 - Inner stand type rolling mill - Google Patents

Description

The present invention is incorporated into, for example, a forming roll stand disposed on a production line of an electric resistance welded tube, and assembled into an inner stand having an opening on a side facing a roll exchange line orthogonal to the production line. The present invention relates to an inner stand type rolling mill that performs forming using a roll assembly.

As shown in FIG. 5 and FIG. 6, a roll that is incorporated in a forming roll stand 81 disposed on an electric sewing tube manufacturing line 80, which is an example of a molding object, and is orthogonal to the electric sewing tube manufacturing line 80. There is known an inner stand type rolling mill 85 that performs molding using a roll assembly 84 assembled in an inner stand 83 having an opening (not shown) on the side facing the exchange line 82 (for example, a patent). Reference 1).
The roll assembly 84 includes an upper roll chock that rotatably supports both ends of the upper horizontal roll 90 in a forming roll stand 81 having four stand posts 86 to 89 that are vertically arranged at intervals in the front-rear and left-right directions. 91, 92, left and right roll chocks 95, 96 for rotating and supporting both ends of left and starboard rolls 93, 94, and lower roll chocks 98, 99 for rotating and supporting both ends of lower horizontal roll 97 are assembled. It is configured. Clamp devices 100 to 103 for clamping the left and right roll chocks 95 and 96 to the inner stand 83 are provided. The blocks 104 to 107 are horizontally advanced and retracted in synchronism with the front-rear direction, and a pair of hydraulic cylinders 108 are provided horizontally and spaced apart in the left-right direction across the stand posts 86 to 89. The rod-side trunnion shaft 109 that is a pair of the hydraulic cylinders 108 is rotatably supported by a pair of bearings 111 that are provided on a bracket 110 that is attached to the outer surface of the inner stand 83 in the front-rear direction. The clamp blocks 104 to 107 and the rod 112 of the hydraulic cylinder 108 are connected via a connection fitting 113. By driving the hydraulic cylinders 108 of the clamp devices 100, 101 and 102, 103, the clamp blocks 104 to 107 are moved in a stroke S inward in the front-rear direction, and the clamp blocks 104 to 107 are moved forward and backward of the left and right roll chocks 95, 96. The left and right roll chocks 95 and 96 can be clamped to the inner stand 83 by being brought into contact with the upper surface of the sliding protrusion 114 formed at the end. Note that when the center of gravity of the clamp blocks 104 to 107 is advanced and retracted by one hydraulic cylinder, the hydraulic cylinder interferes with the stand posts 86 to 89, and therefore is advanced and retracted by two hydraulic cylinders.

JP 2000-288610 A

However, the conventional inner stand type rolling mill 85 still has the following problems to be solved.
In the clamping devices 100 and 102 (101 and 103 are the same), the two hydraulic cylinders 108 are arranged on the bracket 110 via the pair of bearings 111 with the stand posts 86 and 88 interposed therebetween. The center-to-center distance K between the minute stand post 86 and the stand post 88 is increased. As a result, the distance between the left and right bearing centers of the upper horizontal roll 90, the distance between the left and right bearing centers of the lower horizontal roll 97, the distance between the centers of the upper roll chocks 91 and 92, and the distance between the centers of the lower roll chocks 98 and 99 are increased. There is a problem in that the rigidity of the upper horizontal roll 90 and the lower horizontal roll 97 is lowered, and the rigidity of the main body frame of the inner stand type rolling mill 85 including the inner stand 83 is lowered. The increase in the size of the device caused an increase in costs.

The present invention has been made in view of such circumstances, and provides an inner stand type rolling mill capable of shortening the distance between the centers of the stand posts as much as possible and increasing the rigidity of the main body frame including the upper and lower horizontal rolls and the inner stand. For the purpose.

An inner stand type rolling mill according to the present invention that meets the above-described object is disposed on a production line of a molding object, and is erected with a space in the left-right and front-rear directions with respect to the production line of the molding object. Forming roll stand having four stand posts, and incorporated in the forming roll stand, having an opening on the side facing the roll exchange line orthogonal to the production line, and forming a gate-shaped frame in plan view The inner stand and the upper and lower horizontal rolls, which are paired to support both ends of the upper and lower horizontal rolls, and the left and right roll chocks that support the lower and right roll rolls, and the inner roll A roll assembly assembled inside the stand, and the left and right roll chock are a pair of slides provided at both ends in the front-rear direction of the left and right roll chock In the inner stand rolling mill with a clampable four sets of clamping device to the inner stand via an electromotive,
The clamp device is provided below the sliding projection and inside each stand post disposed in the front-rear direction , and has a pivot shaft horizontally supported by the inner stand, and a base portion. An arm member attached to the pivot shaft and having a hook portion formed at a tip thereof capable of being hooked on an upper end of the sliding projection; and a pivot means for pivoting the arm member around the pivot shaft. I have.

In the inner stand rolling mill according to the present invention, the pivot means, at the base side of the arm member, and an operating member provided respectively on the outside of which is arranged in the lateral direction each stand post, the operation You may provide the hydraulic cylinder arrange | positioned in the up-down direction so that a member can be rotated around the said rotating shaft.
In the inner stand type rolling mill according to the present invention, the inner stand may be configured to be able to be taken out of the forming roll stand along the roll exchange line.

In claims 1-3 Inner stand rolling mill according, left, below the slide projection of the right roll chock, and, respectively provided on the inner side of each stand posts arranged in the longitudinal direction, the shaft to the inner stand Since the arm member that can rotate around the supported rotation shaft engages and releases the sliding projection, the distance between the centers of the stand posts in the left-right direction can be shortened compared to the conventional clamping device. Therefore, the rigidity of the main body frame including the upper and lower horizontal rolls and the inner stand can be increased. As a result, the apparatus can be configured compactly and the apparatus can be manufactured at low cost.

In particular, in claim 2 inner stand rolling mill according, rotating means, at the base side of the arm member, and an operating member provided respectively on the outside of each stand posts arranged in the lateral direction, the operation Since the member is provided with a hydraulic cylinder arranged in the vertical direction so that the member can be rotated around the rotation axis, the rotation means can be configured compactly.

In the inner stand type rolling mill according to claim 3, since the inner stand can be taken out of the forming roll stand along the roll exchange line, even if the inner stand is damaged, periodic maintenance can be performed. At this time, the inner stand can be taken out of the forming roll stand without using a special jig.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a plan view of an inner stand type rolling mill according to an embodiment of the present invention, FIG. 2 is a plan view of a clamping device of the inner stand type rolling mill, and FIG. 3 is the inner stand. FIG. 4 is a side sectional view of the clamping device of the inner stand type rolling mill.

As shown in FIGS. 1-4, the inner stand type rolling mill 10 which concerns on one embodiment of this invention is arrange | positioned on the production line 11 of the electric sewing pipe which is an example of a molding target object, right and left, front and back Forming roll stand 15 a having four stand posts 12 to 15 erected at intervals in the direction, and on the side facing roll exchange line 16 that is incorporated in forming roll stand 15 a and orthogonal to manufacturing line 11 An inner stand 18 having an opening 17 and constituting a portal frame in plan view is provided.

The inner stand type rolling mill 10 further includes left and right roll chocks that rotatably support both ends of upper roll chocks 20, 21 and left and starboard rolls 22 and 23 that are paired to rotatably support both ends of the upper horizontal roll 19, respectively. 24, 25, and a roll assembly 29 assembled from the lower roll chocks 27, 28 which are paired to rotatably support both ends of the lower horizontal roll 26, and assembled inside the inner stand 18, and left and right roll chock 24, 25, four sets of clamping devices 30, 30a and 31, which can be clamped to the inner stand 18 via a pair of sliding projections 24a, 25a provided at both ends in the front-rear direction of the left and right roll chocks 24, 25, 31a. The direction of the production line 11 is defined as the front-rear direction, the direction of the roll exchange line 16 is defined as the left-right direction, and the direction orthogonal to the front-rear direction and the left-right direction is defined as the up-down direction.

The clamping device 30 and the clamping device 31 are configured to face each other, and similarly, the clamping device 30a and the clamping device 31a are also arranged to face each other.
The center-to-center distance T between the stand post 12 (13) and the stand post 14 (15) is the same as the center-to-center distance between the upper roll chocks 20 and 21 (the same applies to the lower roll chocks 27 and 28).

The opening 17 of the inner stand 18 is provided with a eaves roll drive unit 32 that can be moved up and down, and the roll assembly 29 is attached to the roll by raising the eaves roll drive unit 32 and opening the opening 17. It is possible to separately move on the roll exchange line 16 from the position X toward the roll exchange position outside the figure using an exchange device.
竪 The roll drive unit 32 opens the opening 17 of the inner stand 18 so that the roll assembly 29 can be inserted into and removed from the inner stand 18, and the opening 17 of the inner stand 18 is closed in plan view. Thus, a rigid rectangular frame is formed, and is configured to move up and down between a lower position (position shown in FIG. 1) which is a roll driving position capable of driving the port roll 22.

The four stand posts 12 to 15 of the forming roll stand 15a are respectively erected at corners on a rectangular base plate (not shown), and the inner stand is positioned at an intermediate height position on the inner surfaces of the stand posts 12 to 15. 18 is attached. In the inner stand 18, a roll assembly 29 is disposed so as to be able to enter and exit toward the roll exchange line 16.

As shown in FIG. 1, the inner stand 18 has a pair of front and rear lateral plates 33 and 34 and a pair of front and rear lateral plates 33 and 34 arranged at intervals in the front-rear direction. It is comprised by the coffin roll drive part 35 connected integrally. The left and right ends of the front and rear horizontally long plates 33 and 34 are connected to each other by an elevating and lowering eaves roll drive unit 32. The eaves roll drive unit 32 elevates and lowers the roll drive unit provided on the upper part of the forming roll stand 15a. It is moved up and down by a device (not shown).

A lower surface of a reduction block attached to a lower end of a pair of reduction devices that are operated in synchronization by a reduction device driving motor (not shown) is brought into pressure contact with upper surfaces of center portions of the upper roll chocks 20 and 21 in the front-rear direction. ing. On the other hand, the lower surface of the lower roll chocks 27 and 28 are in contact with the lower surface of the central part in the front-rear direction of the upper surface of the ram of the pair of boosting devices that operate in synchronism with a booster driving motor (not shown). .

The heel roll drive unit 32 includes an advance / retreat ram 32a disposed so as to freely advance and retract toward the left roll chock 24, and a roll drive motor (not shown) for driving the advance / retreat ram 32a, and drives the roll drive motor. Then, the left roll chock 24 can be horizontally moved in the left-right direction by moving the advance / retreat ram 32a back and forth. On the other hand, the right roll chock 25 is horizontally moved in the left-right direction by the advance / retreat ram 35a of the eaves roll drive unit 35 attached to the right end of the inner stand 18. The heel roll drive unit 35 is connected to a roll chock drive motor attached to the upper part of the forming roll stand 15a via a power transmission shaft (not shown).

The clamp devices 30a and 31a (30 and 31 are the same) will be described in detail with reference to FIGS. The clamping device 30a and the clamping device 31a are configured differently.
The clamp devices 30a and 31a are below the sliding protrusions 24a and 25a of the left and right roll chocks 24 and 25 and inside the front and rear direction of the stand posts 13 and 15 (in FIG. 2, above the stand posts 13 and 15). Rotating shafts 40 and 41 that are horizontally disposed and are pivotally supported via bearings 36, 37, 38, and 39 whose opposite ends are paired with the inner stand 18, and a base portion is attached to the rotating shafts 40 and 41. In addition, arm members 44 and 45 having engaging portions 42 and 43 that can be engaged with the upper ends of the sliding protrusions 24a and 25a are provided at the front portion.

The clamp devices 30a and 31a are further provided on the base side of the arm members 44 and 45 and on the outer side in the left-right direction of the stand posts 13 and 15 (in FIG. 3, the left side of the stand post 13 and the right side of the stand post 15 respectively). The operating members 46 and 47 and hydraulic cylinders 48 and 49 that rotate the operating members 46 and 47 around the rotating shafts 40 and 41 are provided. Here, the rotating means of the arm member 44 (45) includes an operation member 46 (47) and a hydraulic cylinder 48 (49).

As shown in FIG. 4, the arm member 44 (45 is the same) is formed in a U shape when viewed from the side, and is substantially rectangular when viewed from the front as shown in FIG. Protrusions 50 to 53 having different lengths are formed horizontally on each part.
As shown in FIG. 4, a lower liner 55 that is in contact with the upper surface of the liner 54 that is screwed to the upper end of the sliding protrusion 24 a of the left roll chock 24 is screwed to the lower portion of the engaging portion 42 (43 is the same). On the other hand, an upper liner 57 that is in contact with the lower surface of the reaction force support block 56 provided on the inner stand 18 is screwed to the upper portion of the engaging portion 42.
A sleeve-like boss portion 58 is provided at the base portion of the arm member 44 (same for 45), and the boss portion 58 is fixed to the rotating shaft 40 via a key 59.

A rectangular attachment plate 60 of the operation member 46 is screwed to the outside of the lower part of the arm member 44 (same for 45), and a base portion of a plate-like drive piece 61 is fixed to the outer surface of the attachment plate 60. A mounting hole 62 is formed at the tip of the drive piece 61, and a fork-shaped connection fitting 64 screwed to the rod 63 of the hydraulic cylinder 48 is connected to the mounting hole 62 via a pin 65.
The head-side trunnion shaft 66 that is a pair of the hydraulic cylinders 48 is rotatably supported by bearings 67 and 68 that are screwed to the reaction force support block 56. 4 represents a liner that is screwed to the lower end of the sliding protrusion 24a and that contacts and slides on the upper surface of the reaction force support portion 70 provided on the inner stand 18.

With such a configuration, the arm member 44 is rotated about the rotation axis 40 by the rotation angle α by the forward / backward movement of the rod 63 of the hydraulic cylinder 48. At the time of molding, as shown by the solid line in FIG. While contacting the upper surface of the liner 54 of the left roll chock 24 and the upper liner 57 abutting the lower surface of the reaction force support block 56 to clamp the left roll chock 24 to the inner stand 18, while replacing the roll assembly 29, As indicated by a two-dot chain line in FIG. 4, the lower liner 55 moves away from the upper surface of the liner 54 of the left roll chock 24, and the upper liner 57 moves away from the lower surface of the reaction force support block 56 toward the lower outer side. The left roll chock 24 can be unclamped to the inner stand 18. Reference numerals 71 and 72 in FIGS. 1 and 2 denote keeper plates.

Next, the usage method and operation of the inner stand type rolling mill 10 according to the embodiment of the present invention will be described mainly with reference to FIG.
When forming the electric sewing tube, the arm members 44 and 45 of the clamp devices 30a and 31a (30 and 31 are the same) are rotated counterclockwise with respect to the rotation shafts 40 and 41, and the lower liner 55 is moved to the left. While abutting on the upper surface of the liner 54 of the right roll chock 24, 25 and the upper liner 57 abutting on the lower surface of the reaction force support block 56, the vertical movement of the left and right roll chock 24, 25 is restrained and clamped ( (Indicated by the solid line in FIG. 4).

With the left and right roll chocks 24, 25 clamped to the inner stand 18, the upper horizontal roll 19 is crushed through the upper roll chock 20, 21 by the rolling down device, and the lower roll chock 27, 28 is pushed by the rolling up device. On the other hand, the lower horizontal roll 26 is raised, and the left and right side rolls 22 and 23 are moved back and forth in the left-right direction via the left and right roll chocks 24 and 25 by the side roll drive units 32 and 35.

When the roll assembly 29 is replaced, the arm members 44 and 45 of the clamp devices 30a and 31a (30 and 31 are the same) are rotated clockwise with respect to the rotation shafts 40 and 41, and the lower liner 55 is moved to the left. The upper roll 57 moves away from the upper surface of the liner 54 of the right roll chock 24, 25 and the upper liner 57 moves away from the lower surface of the reaction force support block 56 to move the left roll chock 24, 25 upward. The constraint is released (indicated by a two-dot chain line in FIG. 4).

In this state, a roll assembly 29 is formed in the inner stand 18, the roll drive unit 32 is raised to open the opening 17 of the inner stand 18, and the roll is separately rolled toward the roll exchange line 16 by an exchange device. The assembly 29 is removed.

Thus, in the inner stand type rolling mill 10, the clamp devices 30 a and 31 a (30 and 31 are the same) rotate around the rotation shafts 40 and 41 disposed on the inner sides in the front-rear direction of the stand posts 13 and 15. The arm members 44 and 45 for clamping the sliding protrusions 24a and 25a of the left and right roll chocks 24 and 25 are provided, and the operation members 46 and 47 and the hydraulic cylinders 48 and 49 for rotating the rotation shafts 40 and 41 are provided. Since the stand posts 13 and 15 are provided on the outer sides in the left and right direction, the stand post 12 (13) and the stand post 14 (15) are compared with the case where the conventional clamp blocks 104 to 107 are driven by the two hydraulic cylinders 108. Can be made shorter than the center distance K between the stand post 86 (87) and the stand post 88 (89).
Therefore, since the rigidity of the main body frame including the upper horizontal roll 19, the lower horizontal roll 26, and the inner stand 18 can be increased, the apparatus can be configured compactly and can be manufactured at low cost.

The present invention is not limited to the above-described embodiments, and can be changed without departing from the gist of the present invention. For example, some or all of the above-described embodiments and modifications are included. The case where the inner stand type rolling mill of the present invention is configured in combination is also included in the scope of the right of the present invention.
In the present embodiment, the rotating means is configured to include the operation member and the hydraulic cylinder, but is not limited thereto, and may be configured in other ways as necessary.

Although the engagement between the inner stand and the forming roll stand has not been described in detail, the inner stand can be configured to be removable outside the forming roll stand along the roll exchange line.
Although the electric resistance welded tube is used as the molding object, the shape is not limited to this, and a shape steel can be used as necessary.

It is explanatory drawing which looked at the cross section of the inner stand type rolling mill which concerns on one embodiment of this invention. It is a top view of the clamp apparatus of the inner stand type rolling mill. It is a front view of the clamp apparatus of the inner stand type rolling mill. It is a sectional side view of the clamp apparatus of the inner stand type rolling mill. It is explanatory drawing which planarly viewed the inner stand type rolling mill which concerns on a prior art example. It is a sectional side view of the clamp apparatus of the inner stand type rolling mill.

Explanation of symbols

10: Inner stand type rolling mill, 11: Production line, 12-15: Stand post, 15a: Molding roll stand, 16: Roll exchange line, 17: Opening, 18: Inner stand, 19: Upper horizontal roll, 20, 21: Upper roll chock, 22: Port roll, 23: Star roll, 24: Left roll chock, 24a: Sliding protrusion, 25: Right roll chock, 25a: Sliding protrusion, 26: Lower horizontal roll, 27, 28: Lower Roll chock, 29: Roll assembly, 30, 30a: Clamp device, 31, 31a: Clamp device, 32: Reed roll drive unit, 32a: Advance / retract ram, 33: Front horizontally long plate, 34: Rear horizontally long plate, 35: Reed roll Drive part, 36-39: Bearing, 40, 41: Rotating shaft, 42, 43: Engagement part, 44, 45: Arm member, 46, 47: Manipulation Member, 48, 49: Hydraulic cylinder, 50-53: Protruding part, 54: Liner, 55: Lower liner, 56: Reaction force support block, 57: Upper liner, 58: Boss part, 59: Key, 60: Mounting plate 61: drive piece, 62: mounting hole, 63: rod, 64: connection fitting, 65: pin, 66: head side trunnion shaft, 67, 68: bearing, 69: liner, 70: reaction force support portion, 71, 72: Keeper plate

Claims (3)

A forming roll stand having four stand posts disposed on a manufacturing line of a molding object, and standing up and down in the left-right and front-rear directions with respect to the manufacturing line of the molding object, and the molding roll Built in the stand, has an opening on the side facing the roll exchange line orthogonal to the production line, and has an inner stand that forms a portal frame in plan view, and both ends of the upper and lower horizontal rolls, respectively. The roll assembly assembled from the left and right roll chock that rotates and supports both the upper and lower roll chock and the left and right side roll rolls, and is assembled inside the inner stand, and the left and right 4 sets of clampable roll chock can be clamped to the inner stand via a pair of sliding projections provided at both ends of the left and right roll chock in the front-rear direction. In the inner stand rolling mill that includes a lamp unit,
The clamp device is provided below the sliding projection and inside each stand post disposed in the front-rear direction , and a pivot shaft horizontally supported by the inner stand,
An arm member in which a base portion is attached to the rotating shaft, and a hook portion that can be hooked on an upper end of the sliding protrusion is formed on the tip portion;
An inner stand type rolling mill comprising: a rotation means for rotating the arm member about the rotation axis. In claim 1 the inner stand rolling mill according said pivot means, at the base side of the arm member, and an operating member provided each of the arranged in the lateral direction on the outside of each stand post, the An inner stand type rolling mill comprising: a hydraulic cylinder disposed in a vertical direction and capable of rotating an operation member around the rotation shaft. The inner stand type rolling mill according to any one of claims 1 and 2, wherein the inner stand is configured to be able to be taken out of the forming roll stand along the roll exchange line. Inner stand type rolling mill.

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