JPS6323853B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in a tube straightening machine.

Conventionally, a plurality of annular roller dies are installed in a rotating frame through which the material to be straightened passes from one end to the other, and the annular roller dies are arranged at an inclination angle with the axis of the rotating frame and in a direction perpendicular to the axis. For example, a straightening machine disclosed in Japanese Patent Publication No. 40-4541 is known, in which the position of the straightening machine can be arbitrarily adjusted, and the material to be straightened is sent out sequentially while being straightened by rotating the rotary frame. be.

Therefore, when straightening a hollow tube material, such as a high-frequency induction welded stainless steel pipe, using the known straightening machine, the tube material may not make good line contact with the hollow hole of the die, depending on the amount of change in the outer diameter. Not only will the pipe material not be damaged, but strong pressure may be applied to a portion of the pipe material, causing a local dent.

Other prior art is shown in Japanese Patent Application Laid-Open No. 1061/1983. This prior art also shows a configuration in which a rotating frame is provided with a plurality of die rolls to straighten pipe materials and the like.

In each of these prior art techniques, it is desired to further increase the corrective force. Furthermore, no measures have been taken to accurately straighten various pipe materials with different outer diameters.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pipe straightening machine that has improved straightening power and can accurately straighten various pipes having different outer diameters.

The present invention provides a hollow shaft neck portion 2 that allows passage of the pipe material between two bearings 10 spaced apart along the traveling direction of the pipe material.
Rotating frame 20 rotatably supported via 4
A plurality of hollow die rolls 43 arranged at intervals along the traveling direction of the pipe material on the rotating frame body 20; The die rolls 43 and the shaft neck part 2 on the pipe material outlet side.
4, a pair of hourglass-shaped crush rolls 56 are rotatably mounted on the rotary frame 20, and the crush rolls 56 have their axes inclined with respect to the traveling direction of the pipe material, and The die roll 43 is supported in a plane parallel to the direction of travel of the pipe material, and the die roll 43 is rotatably mounted on the roll holder 41 around an axis inclined with respect to the direction of travel of the pipe material, and the roll holder 41 is a rotating frame. A protrusion 4 extending perpendicularly to the axis of the body 20
1a, and a notch 41b that is formed on the opposite side of the die roll 43 from the protrusion 41a and faces outward, a female threaded member 62 is fitted into the notch 41b, and the female threaded member 62 is connected to the rotating frame. It is screwed into a threaded rod 61 extending in a direction perpendicular to the axis of the body 20, the threaded rod 61 is provided on the main body 21 fixed to the rotating frame 20, and the main body 21 has means for rotationally driving the threaded rod 61. 63 to 65 are provided, and one end of a lid 32 is rotatably supported on the main body 21 by a pin 33 parallel to the axis of the rotating frame 20, and the lid 32 has a protrusion. Concave groove 32a that guides the strip 41a
means for holding the other end of the lid 32 on the main body 21 with the protrusion 41a fitted into the groove 32a of the lid 32, and releasing this holding to enable the roll holder 41 to be removed. This is a pipe material straightening machine characterized by having 34 and 35 provided therein.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 1, a rotary frame body 20, which supports hollow shaft neck portions 24 formed at both ends thereof by bearings 10, is rotationally driven by a motor (not shown) via a V-pulley 1. One bearing 10 is provided on the inlet side (left side in Figure 1) of the tube material to be straightened (hereinafter referred to as tube material), and two bearings are provided on the outlet side (right side in Figure 1). The V-pulley 1 is fitted on the shaft neck between the two outlet side bearings. The rotating frame body 20 has a cylindrical main body 21 whose cross section perpendicular to the direction of travel of the pipe material is approximately square, and end plates 22 fixed to the pipe material inlet side and outlet side of the cylindrical main body 21.The end plate 22 has a center. A circular hole 22a for introducing a tube material is provided in the section. In the circular hole 22a,
A roll guide 23 is attached that communicates with the hollow portion of the shaft neck portion 24 and has a hole having approximately the same diameter as the hollow hole. The roll guide 23 has an inner surface curved in a convex shape along the traveling direction of the tube material, and can freely rotate around the tube material.

The cylindrical main body 21 includes one side of the square frame,
Alternately facing the other surface that is turned 90 degrees with respect to the surface,
A plurality of die loading/unloading ports 21a and one crush roll loading/unloading port 21b are provided at regular intervals in the direction of movement of the pipe material.
is provided.

Inside the cylindrical main body 21 facing the die loading/unloading port 21a and the crush roll loading/unloading port 21b, there are a die mounting portion 30 and a crushing portion 50, respectively.
are provided, and each of these parts has a die 40,
Equipped with Crash Roll 56. That is, as shown in FIGS. 2 and 3 in the die mounting portion 30,
A cylindrical main body 21 facing the die loading/unloading port 21a
A die substrate 31 is fixed to a part of the cylindrical body 21 in the width direction (left and right direction in FIG. 2) on the upper surface of the substrate.
A groove 31a is provided along the line. Further, a lid body 32 is pivotally supported on the die loading/unloading port 21a by a pin 33 so as to be rotatable in a plane perpendicular to the direction in which the tube material advances.
At the other end, a wedge piece 34 whose retreat is restricted by a locking pin 35 passes through a portion of the lid 32 and is inserted into the opposing surface of the cylindrical body 21 and locked. The lid body 3
A concave groove 32a is provided on the lower surface of 2 along the width direction thereof. One end of the lid 32 is connected to the rotating frame 20
The main body 21 is rotatably supported by a pin 33 parallel to the axis of the main body 21 . The protrusion 41a is guided by the groove 32a of the lid 32.

Although not shown, the crushing section 50 also includes a crushing section substrate cover and is constructed in the same manner as the die mounting section.

In the die 40, a die roll 43 is freely rotatably attached to a plurality of roll holders 41 (five in this example) arranged in series along the traveling direction of the tube material through a ball bearing 42 in the cylindrical body 21. It becomes. The roll holder 41 is a frame having a generally square shape with respect to the traveling direction of the tube material, and
A protrusion 41a that fits into the groove 32a of the lid 32
along the width direction of the die substrate 31 and the lid body 32 (the left-right direction in FIG. 2, that is, the direction perpendicular to the axis of the rotating frame body 20)
0 indicates that it is movable. Roll holder 41
A rectangular notch 41b facing outward is provided at approximately the center in the width direction of the frame piece located on the opposite side of the lid. The dice roll 43 is hollow in the shape of a truss, and is fitted into the roll holder 41 via a ball bearing 42 with its axis tilted with respect to the axis of the tube.

As shown in FIGS. 4 to 6, the crushing portion 50 includes a pair of opposing drum-shaped crushing rolls 5.
6, whose axes lie in a plane parallel to the direction in which the tube travels, are tilted back and forth so as to be opposite to each other, and both ends thereof are supported by a roll bracket 52 via bearings. The bracket 52 is rotatably supported by a crush roll holder 51 in the shape of a rectangular frame via a shaft 53 and a bottomed sleeve 54.
A square hole 54a for inserting a wrench is provided in the center of the bottomed portion of the sleeve 54.

The roll bracket 52 is rotatable around the shaft 53 by an angle adjustment section 55, and is configured to freely change the tilt angle of the crush roll 56 with respect to the direction of movement of the tube material.

That is, a disc segment 55a having a convex arc surface 55d concentric with the sleeve 54 is fixed to the sleeve 54, and the segment 55a is rotatably supported by the concave arc surface 51a of the holder 51. Further, a pair of arcuate slits 55b are provided in the crush roll holder 51 so as to face each other with the shaft 53 interposed therebetween.

A bolt 55c screwed onto the roll bracket 52 is loosely fitted into the slit 55b. The bolt 55c tightens the crush roll holder 51 by being screwed in, and the roll bracket 52
will be fixed. The square hole 54a is useful for inserting a wrench to change the tilt angle.

The position of the die 40 is adjusted by moving the roller holder 41 in a direction perpendicular to the traveling direction of the tube material via the die moving section 60.
That is, as shown in FIG. 2, the die moving section 60 is provided in the main body 21 along the width direction of the die substrate 31 (left-right direction in FIG. 2), and includes a rotatable threaded rod 61 and the threaded rod. Female screw member 6 screwed into 61
2, a worm 63, a worm wheel 64, and a motor 6 for moving the female threaded member 62.
Consists of 5. The motor 65 is rotated by operating a switch even when the rotating frame 20 is rotating. The female screw member 62 is connected to the notch 41 of the roll holder 41.
b, and the threaded rod 6 is activated by the motor 65.
1, the roll holder 41 is moved in the length direction of the threaded rod 61.

In the crush roll moving part, as shown in FIGS. 4 to 6, a protrusion 51c is provided on one side (upper side in the figure) of the holder 51, and a notch 51b and a groove 51d are provided on the other side (lower side in the figure). , the holder 51 is movable in the left-right direction as shown in the fourth figure by a driving member such as a motor, a worm, a worm wheel, a threaded rod, a female screw member, etc. (all not shown) similar to the die moving unit 60.

To straighten a tube using the straightening machine having the above structure, the tube is inserted into the hollow shaft neck 24 from the inlet side (left side in FIG. 1) with respect to the rotating rotating frame 20.
Insert it through the guide roll 2. When the inserted tube material reaches the first die 40, the die 4
Due to the revolution and rotation of the die roll 43, it comes into line contact with the inner surface of the hollow hole of the die roll 43, and a bending moment is applied. The free rotation of the die roll 43 prevents the generation of frictional force. Therefore, the tube material will not be scratched or excessive pressing force will be applied. While the tube progresses in a zigzag pattern according to the mounting angles of the five dies, a bending moment is applied by the line contact, and the tube is straightened by uniform pressure over its entire circumference. A propulsive force is applied to the tube material by the inclination of the rotation axis of the die roll 43.
Then, at the final crushing part 50, crushing force and bending force are applied to increase the straightening force. 3 in FIG. 1 is a freely rotating pinch roll.

In the above, when the outer diameter of the tube material changes, instead of changing the inclination angle of the die 40, the die roll 43 with a different hole diameter is used for correction, so that full line contact is possible without straining the tube material. Moreover, since each die can move in a direction perpendicular to the direction in which the tube material travels, the amount of bending can be adjusted by operating a switch while rotating the rotary frame.

Further, since the crushing part 50 is arranged at the final position in the direction of movement of the tube material, the straightening force is high, and since the crushing part can also be replaced and moved like the die, more appropriate straightening can be performed.

Furthermore, since the present invention eliminates the need to rotate the tube by rotating the frame 20, it is suitable for straightening tubes and bars wound around a winding shaft.

As the means for moving the dice 40, in addition to the motor used in the embodiment, a hydraulic cylinder may be used. Further, in the embodiment, all the dice are movable, but some of the dice may be fixed.

As described above, since the present invention rotates the frame, there is no need to rotate the tube to be straightened, and therefore it can be used for straightening tubes and bars wound around a winding shaft.
In addition, a plurality of die rolls are arranged in series within the rotating frame at an angle with respect to the traveling direction of the material to be straightened, so that the entire surface of the material to be straightened is in line contact with the die rolls, and the inclination of the die rolls is A feeding force is applied to the material to be straightened, so that no excessive partial pressure is applied to the material to be straightened, and even in the case of a welded pipe material, no partial dents occur. Furthermore, in the final stage, a pair of drum-shaped crush rolls are arranged so that their axes are tilted with respect to the direction in which the pipe material travels and are in parallel planes, and the pipe material is held in place for straightening, resulting in highly accurate correction. Many results were achieved, including the ability to implement In particular, in the present invention, the crush roll 5
6 is the die roll 43 on the tube outlet side and the rotating frame 2
Since it is rotatably provided between the shaft neck portion 24 of the tube material and the shaft neck portion 24 of the tube material, it is possible to improve the straightening force of the tube material.

Moreover, in the present invention, one end of the lid 32 is rotatably supported on the main body 21 by the pin 33, and the other end of the lid 32 is supported by the holding means 34,
35 and separates from the main body 21,
Thereby, by angularly displacing the rotary frame body 20 around the pin 33, the die roll 43 to which the roll holder 41 is attached can be easily replaced. Therefore, the die rolls 43 with different hole diameters
can be exchanged to straighten pipes with various outer diameters, so compared to a configuration where the inclination angle of the die 40 is changed, it is possible to make full line contact without putting strain on the pipe, allowing for accurate straightening. becomes possible.

Furthermore, according to the present invention, by driving the threaded rod 61 with the rotation drive means 63 to 65, the female threaded member 62 is displaced in a direction perpendicular to the axis of the rotating frame 20, and thereby the die roll 43 Since the position of the tube can be adjusted, the amount of bending of the tube can be easily adjusted even during operation.

[Brief explanation of the drawing]

1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view of FIG. 1, FIG. 3 is a sectional view of FIG. 2, and FIG. 4 is a sectional view of FIG. 1. of-
Enlarged sectional view, Figure 5 is the right side view of Figure 4, Figure 6 is the right side view of Figure 4.
The figure is a - sectional view of FIG. 4. 20 is a rotating frame body, 21 is a cylindrical main body, 21a is a die loading/unloading port, 21b is a crush roll loading/unloading port,
30 is a die attachment part, 31 is a die substrate, 32 is a lid, 2 is a guide roll, 40 is a die, 41 is a roll holder, 43 is a die roll, 50 is a crush part, 51 is a crush roll holder, 52
53 is a roll bracket, 53 is a shaft, 54 is a sleeve, 55 is an angle adjustment portion, 55a is a disc segment, 5
6 is a crush roll, and 60 is a die moving part.

Claims (1)

[Scope of Claims] 1. A rotating frame 20 that is rotatably supported via a hollow shaft neck portion 24 that allows passage of the tubular material between two bearings 10 that are spaced apart along the traveling direction of the tubular material; A plurality of lap-like hollow die rolls 43 are arranged at intervals along the traveling direction of the pipe material on the body 20, and the die rolls 43 and the shaft neck part 2 on the pipe material exit side
4, a pair of hourglass-shaped crush rolls 56 are rotatably mounted on the rotary frame 20, and the crush rolls 56 have their axes inclined with respect to the traveling direction of the pipe material, and The die roll 43 is supported in a plane parallel to the direction of travel of the pipe material, and the die roll 43 is rotatably mounted on the roll holder 41 around an axis inclined with respect to the direction of travel of the pipe material, and the roll holder 41 is a rotating frame. A protrusion 4 extending perpendicularly to the axis of the body 20
1a, and a notch 41b that is formed on the opposite side of the die roll 43 from the protrusion 41a and faces outward, a female threaded member 62 is fitted into the notch 41b, and the female threaded member 62 is connected to the rotating frame. It is screwed into a threaded rod 61 extending in a direction perpendicular to the axis of the body 20, the threaded rod 61 is provided on the main body 21 fixed to the rotating frame 20, and the main body 21 has means for rotationally driving the threaded rod 61. 63 to 65 are provided, and one end of a lid 32 is rotatably supported on the main body 21 by a pin 33 parallel to the axis of the rotating frame 20, and the lid 32 has a protrusion. Concave groove 32a that guides the strip 41a
means for holding the other end of the lid 32 on the main body 21 with the protrusion 41a fitted into the groove 32a of the lid 32, and releasing this holding to enable the roll holder 41 to be removed. A straightening machine for pipe material, characterized in that it is provided with 34 and 35.