JP2001096309A - Device for increasing thickness of metallic bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which can easily increase the thickness of metallic bars in the specified area along the length without bending them, even for the large diameter and/or heavy weight. SOLUTION: In this device, the first truck 7, which loads the components such as the first guide unit 12 and the second guide unit 13 equipped with the rollers retaining the metallic bar 1, and an induction heating coil 31 for heating the bar 1, is traveled to a desired position and then stopped at the position. At the same time, the bar 1 is compressed at both ends by the first loading compression head 51 built up on a fixed support 50 and the second loading compression head 55 built up on the second moving support truck 54. Successively the bar 1, supported by the first and the second guide unit 12, 13, is heated to increase the thickness in the specified area by moving both the induction heating coil 31 and the second guide unit 13 along the length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal strip thickening apparatus for thickening a part of a metal strip such as a steel pipe in an axial direction.

[0002]

2. Description of the Related Art Conventionally, in a state where a metal strip such as a steel pipe is subjected to an axial compressive force, a small area in the axial direction is locally heated by an annular induction heating coil to increase the wall thickness. 2. Description of the Related Art A technique is known in which an induction heating coil is moved in an axial direction with respect to a metal strip to move a thickening position, thereby continuously increasing the thickness of a desired region in the axial direction of the metal strip (for example, a technique). And JP-B-2-7738). However, an apparatus that takes into account the productivity of the thickening process has not been developed.

[0003] Therefore, the present applicant has previously developed a device capable of performing a thickening process with high productivity and applied for a patent (see Japanese Patent Application Laid-Open No. 10-137841). This device has an induction heating coil for heating a metal strip in a processing zone for performing a thickening process on the metal strip, a first guide device for holding the metal strip movably in an axial direction on both sides thereof, and a second guide device. Provide a guide device,
Further, a first bogie and a second bogie holding a compression force applying head for engaging a compression force by engaging with an end of a metal strip material outside the first guide device and the second guide device, respectively. It is configured to be movable. Then, in this apparatus, the thickening process is performed in the following procedure. That is, first,
The first bogie is largely retracted, and the metal strip to be thickened is sent between the first bogie and the first guide device.
The first bogie is advanced in a state where the compression force applying head of the first bogie is engaged with one end of the metal strip, and the metal strip is fed in the axial direction thereof, so that the induction heating coil of the processing zone and the first and second coils before and after the same are moved. And the other end is engaged with the compression force applying head of the second bogie, and then the induction heating is performed in a state where the first and second compression force applying heads apply a compressive force to the metal strip. By moving the induction heating coil while locally heating the metal strip material with the coil, a desired range of wall thickness increase processing is performed, and after the processing is completed, the second bogie is largely retracted, thereby forming the processed metal strip. The material is drawn out of the second guiding device and then discharged. As described above, this apparatus can easily and promptly supply and discharge the metal strip by using the movement of the first bogie and the second bogie, and can set a desired area of the long metal strip in the processing zone. , And it is possible to perform a thickening process on a desired area.

[0004]

However, it has been found that the apparatus described in Japanese Patent Application Laid-Open No. 10-137841 still has some points to be improved. That is, when handling a metal strip having a large diameter and a long length as a metal strip to be thickened, the entire apparatus becomes extremely long, and the distance for moving a heavy metal strip becomes long, and the strength and rigidity of the apparatus are increased. However, there is a problem that the equipment cost must be increased.

The present invention has been made in view of such a problem, and it is possible to apply a thickening process to a desired region even for a large-diameter and long metal strip. The moving distance of the metal strip when thickening
It is another object of the present invention to provide a thickening apparatus in which the entire length of the apparatus is reduced.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a first method for holding both sides of a thickened region of a metal strip when the metal strip is thickened. A guide device, a second guide device, and a heating device for heating a metal strip are mounted on a first bogie so as to be movable in the axial direction of the metal strip, and one end of the metal strip to be thickened. Is engaged with a first compressive force applying head of a fixed support fixedly provided at a fixed position, and the other end of the second compressive force applying head of a second bogie movable in the axial direction of the metal strip. In the configuration.

With this configuration, when setting the metal strip, the first carriage and the second carriage are retracted in a direction away from the fixed support, and the metal strip is moved between the first carriage and the fixed support. After forming a space larger than the length and supplying a metal strip to the space, the first bogie and the second bogie are advanced, and the metal strip is provided on the fixed support base and the second bogie, respectively. And by holding the second compression force applying head, and moving the first bogie to a desired position in the axial direction of the metal strip, stopping at that position and performing a thickening process, thereby performing metal thickening. The desired thickness of the metal strip can be increased without moving the strip in the axial direction. Then, the operation of moving the first bogie to one desired position with respect to the metal strip and performing the thickening processing and then moving to the next desired position and performing the thickening processing is repeated, whereby the metal strip itself is repeated. It is possible to apply a thickening process to a desired and plural places of the metal strip without moving the metal strip. In addition, during the thickening process, the front and the back of the area heated by the heating device are constrained by the first guide device and the second guide device, so that it is possible to prevent the bending of the metal strip that is likely to occur during the thickening process. In addition, the bending of the final product can be extremely small.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A thickening apparatus according to a first embodiment of the present invention comprises a first bogie movable along a horizontal machining axis, and a first bogie moving means for moving the first bogie. And a first guide device and a second guide device mounted on the first bogie to hold the metal strip on the processing axis and movably in the axial direction, and mounted on the first bogie. And an induction heating coil for heating a predetermined width of the metal strip in the axial direction between the first guide device and the second guide device, and a moving means for moving the induction heating coil along the processing axis. A heating device, and compression means for acting on both ends of the metal strip held on the processing axis to apply a compressive force in an axial direction, the compression means engaging with one end of the metal strip. Holding the first compressive force applying head fixed in place A constant support base, a second carriage movable along the processing axis while holding a second compression force applying head engaged with the other end of the metal strip, In a state where the compressing force applying head is engaged with both ends of the metal strip, by pressing one of the first compressing force applying head and the second compressing force applying head toward the other, the axial line is applied to the metal strip. And a pressurizing mechanism for applying a compressive force in the direction.

According to this configuration, the first bogie and the second bogie are retracted in a direction away from the fixed support, and a metal strip to be thickened is supplied between the first bogie and the fixed support. Next, the first bogie and the second bogie are advanced, and the metal strip is held by the first and second compressive force applying heads respectively provided on the fixed support base and the second bogie, and the first bogie is made of the metal. After being moved to a desired position in the axial direction of the strip and stopped at that position, in a state where a compression force is applied to the metal strip by the first and second compression force applying heads, the metal strip is heated by the induction heating coil. By heating a predetermined width in the axial direction and moving the induction heating coil in the axial direction with respect to the metal strip,
A desired region in the longitudinal direction of the metal strip can be thickened, and the same operation can be performed by moving the first bogie to another desired area of the metal strip, so that a plurality of the same metal strip can be obtained. Thickening processing can be applied to individual locations. After the end of the thickening process, the first carriage and the second carriage are retracted again in a direction away from the fixed support, separated from the end of the metal strip, and the metal strip is taken out of the apparatus. As described above, it is possible to increase the thickness of a metal strip having an arbitrary length at a desired position. Also,
At the time of thickening, since the first and second guides constrain the area before and after the area where the thickening deformation occurs, it is possible to prevent bending of the metal strip that tends to occur during thickening, and The bend can be extremely small. Furthermore, since the first guide device and the second guide device are mounted on a common first carriage, the first guide device and the second guide device are mounted so that the positional accuracy of the metal strip held by the two devices is increased. Accuracy can be increased, and from this point, the bending caused by the thickening process can be further reduced.

Here, the second guide device can be moved along the machining axis with respect to the first bogie, and a second guide device moving means for moving the second guide device is provided. preferable. With this configuration, when the induction heating coil is moved along the metal strip to perform the thickening process, the second guide device is positioned near the induction heating coil and moved together with the induction heating coil, The second guide device can always hold the vicinity of the portion where the metal strip has undergone the thickening deformation, whereby the bending deformation that may occur in the metal strip can be prevented more favorably.

The above-mentioned first bogie further includes a second induction heating coil for heating a predetermined width of the metal strip in the axial direction between the first guide device and the second guide device, and a second induction heating coil thereof. It is preferable to provide a second heating device provided with a moving means for moving the wafer along the processing axis. When the second heating device is provided in this manner, after the metal strip is thickened by the first heating device, the thickened portion is reheated by the second heating device, and heat treatment can be performed. It is possible to improve the physical properties of the thickening processing region.

When the second heating device is provided on the first carriage, the second heating device is provided between the first guide device and the second guide device instead of being disposed between the first guide device and the second guide device. And a third guide device for holding the metal strip movably in the axial direction is provided on the outside thereof, and the first guide device and the second guide device are each provided with a first guide. It is preferable that the apparatus is configured to be moved with respect to the first carriage by the apparatus moving means and the second guide apparatus moving means.
With this configuration, when performing the thickening process, the metal strip is held by the first guide device and the second guide device, and the thickening process is performed using the induction heating coil disposed between the two. When performing, heat treatment can be performed using an induction heating coil arranged between the third guide device and the first guide device while holding the metal strip, In any case, the interval between the holding positions of the metal strips can be shortened to suppress the occurrence of bending more favorably, and moreover, between the region where the thickening is performed and the region where the next thickening is performed (neck portion). Needs to be long enough for the first guide device to be located,
It is possible to reduce the length (length of the neck portion) between the regions to be subjected to the thickening process.

[0013] In the apparatus having the above-described configuration, the first bogie and the second bogie may be positioned between the first compression force applying head of the fixed support and the metal strip to be thickened. A plurality of holding stands for holding the metal strip movably in the axial direction, and the axes of the metal strips holding the plurality of holding stands, respectively, in the space, which can be retracted to a standby position where a space can be formed. It is preferable to provide a holding device provided with an operating position coinciding with the machining axis and a plurality of elevating mechanisms for elevating and lowering to a retracted position separated downward from the machining axis. With this configuration, the first carriage and the second carriage are retracted to the standby position, and after lowering the plurality of holders to the retracted position, the metal strip is fed onto the holders, and then the holders are raised. In this way, the metal strip can be supplied to the position between the fixed support and the first bogie and at the position where the central axis of the metal strip coincides with the processing axis, and in that state, the first bogie and the second bogie are advanced. A guide in which the fixed support base and the first compression force applying head and the second compression force applying head of the second bogie are engaged with both ends of the metal strip, and the metal strip is mounted on the first bogie. The first carriage can be positioned at the desired position of the metal strip by passing it through the device or induction heating coil, and the metal strip can be discharged by the reverse operation, reducing the space required for loading and unloading the metal strip. Thus, the overall length of the device can be reduced. Also, when the first carriage moves to the desired position of the metal strip, the first carriage can be moved without hindrance by lowering the holding table that may interfere with it, and the other holding tables are raised. The metal strip can be supported by holding the metal strip in the bent state, and even when handling heavy metal strips, the metal strip can be held without causing deflection due to its own weight. Bending can be prevented.

Further, it is preferable that the first and second bogies are respectively movably held on four rails provided parallel to the processing axis at positions surrounding the processing axis. With this configuration, the first bogie and the second bogie are guided by four rails, so that traveling is stable, there is almost no inclination, and the reaction force acting on the second bogie when the metal strip is compressed is reduced. It can be received by four rails provided at positions surrounding the processing axis, can receive a stable reaction force, and can increase the wall thickness without bending the metal strip.

Further, at least one of the first compressing force applying head and the second compressing force applying head has a length capable of penetrating the first guide device, second guide device or third guide device adjacent thereto. In addition, it is preferable that a long nose having substantially the same outer shape as the metal strip is provided. With this configuration, by setting the long nose holding the end of the metal strip to a position penetrating the first guide device, the second guide device, or the third guide device, the end of the metal strip adjacent to the long nose is set. Can be subjected to a thickening process.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention shown in the drawings will be described below. FIG. 1 is a schematic longitudinal sectional view of a wall-thickening apparatus according to an embodiment in which the present invention is applied to wall-thickening processing of a square steel pipe, wherein 1 is a metal strip material which is a square-shaped steel pipe, and 2 is a wall-thickening apparatus. The thickening apparatus 2 performs the thickening while holding the metal strip 1 on a horizontal processing axis OO (at a position where the center axis of the metal strip 1 coincides with the processing axis OO). Configuration
Four rails 4 are provided at positions surrounding the processing axis OO in parallel with the processing axis OO. As will be described later, since this rail 4 holds various carts so as to be movable and receives a reaction force of a compressive force applied to the metal strip 1 at the time of thickening, each cart is moved to an accurate position. It is made to the required accuracy so as to be able to carry out, and is made strong enough to withstand the above-mentioned reaction force, and is held by a large number of columns 5 so as to maintain its position accuracy.

A first carriage 7 is movably held on the rail 4. FIG. 2 is a schematic sectional view of the first bogie 7, FIG.
FIG. 4 is a schematic sectional view taken along arrows AA and BB in FIG. The first bogie 7 includes a frame 8 extending in parallel with and adjacent to the four rails 4, and wheels 9 running against two orthogonal surfaces of the rail 4 corresponding to the respective frames 8.
a and 9b. A mechanism (not shown) for finely adjusting the mounting position of the wheels 9a and 9b with respect to the first bogie 7
Is provided, whereby the center of the first bogie 7 can be made to coincide with the processing axis OO, and can be run on the processing axis OO. A rack 1 is mounted on the upper two rails 4.
0 is attached, and the first truck 7 has its rack 1
A first bogie moving means (not shown) provided with a pinion gear that meshes with zero and a motor that rotates the pinion gear is provided. Thus, the first bogie 7 can move to a desired position along the machining axis OO.

On the first bogie 7, the metal strip 1 is provided with a processing axis O.
-First guide device 1 for holding axially movable on -O
2, a second guide device 13 and a third guide device 14 are mounted. Among them, the first guide device 12 and the second guide device 1
Reference numeral 3 is movably held by using the four frames 8 of the first carriage 7 as rails. In other words, the first guide device 12 and the second guide device 13 respectively have wheels 16a, 16b running in contact with two orthogonal surfaces of each frame 8.
And a mechanism (not shown) for finely adjusting the mounting position of the wheel is provided.
And, the center of the second guide device 13 can be made to coincide with the processing axis OO, and can be run on the processing axis OO.
Further, the first bogie 7 has a first guide device moving means and a second guide device moving means each including a cylinder mechanism for moving the first guide device 12 and the second guide device 13 with respect to the first bogie 7. Means (neither shown) are provided. Incidentally, the first guide device moving means and the second guide device moving means are not limited to those using a cylinder mechanism,
It can be appropriately changed to one using a screw shaft and a nut, one using a rack and a pinion, and the like.

The first guide device 12 includes a guide roller 20 and an alignment roller 21 for holding the metal strip 1 movably. This guide roller 20
This is for holding the metal strip 1 at a position where its axis coincides with the processing axis OO, and is provided above, below, right and left of the metal strip 1. Further, an operation mechanism 23 for moving the guide roller 20 between an operation position for positioning the guide roller 20 in contact with the metal strip 1 and a release position which is more open is connected to the guide rollers 20. . The operating mechanism 23 is not particularly limited, but a mechanism having a centering function is used in the present embodiment. That is, a feed mechanism having a combination of a screw shaft and a nut for vertically moving each is connected to the upper and lower guide rollers 20, and the upper and lower screw shafts or nuts are connected to interlock with each other, and a hydraulic motor or the like is connected. It is configured to be rotationally driven by a driving device, and the moving directions of the upper and lower guide rollers 20 at that time are reversed. With this configuration, the upper and lower guide rollers 20 uniformly move in opposite directions about the processing axis OO, and therefore, move symmetrically with respect to the processing axis OO. Thus, in a state where the metal strip 1 is inserted between the upper and lower guide rollers 20, the upper and lower guide rollers 20 are moved toward the processing axis OO, and the metal strip 1 is clamped. 1 can be held at a position where its axis coincides with the machining axis OO. At this time, the upper and lower guide rollers 2
0 can hold the metal strip 1 on the processing axis OO irrespective of the size of the metal strip 1, so that the size change of the metal strip 1 can be directly handled. Upper and lower guide rollers 2
The movement stroke of 0 is determined so that the metal strip material handled by the thickening apparatus can be used from the maximum size to the minimum size. The same operation mechanism 23 is connected to the left and right guide rollers 20.

The alignment roller 21 serves to return the center position of the thickened portion to the original position when the center position of the thickened portion is shifted from the processing axis OO during the thickening process. The metal strip 1 is provided above and below and on the left and right. Further, each of the upper and lower alignment rollers 21 is provided with a detecting means (not shown) for detecting a shift amount of the center position of the thickened portion of the metal strip 1 from the processing axis OO. A servo mechanism 24 for displacing the position of the alignment roller 21 in accordance with the detection signal so as to eliminate the displacement is connected. As the servo mechanism 24, a known mechanism can be used as appropriate, but in this embodiment, a servo cylinder is used as a means for moving the alignment roller 21 in a direction to approach and separate from the processing axis OO. I have. The movement stroke of the alignment roller 21 by the servo cylinder is determined so that the metal strip material handled by the thickening apparatus can be used from the maximum size to the minimum size.
Thereby, for the metal strips of various sizes, the alignment roller 21 controls the center position of the thickened portion during the thickening processing so as not to be deviated from the processing axis OO, and the metal strip is bent. Can be prevented.

The second guide device 13 is, as shown in FIG.
It is configured symmetrically with respect to the first guide device 12, and includes a guide roller 20, an operating mechanism 23, an alignment roller 21, and a servo mechanism 24, like the first guide device 12.

The third guide device 14 is fixed to one end of the first carriage 7 and has the same configuration as the guide roller 20 provided on the first guide device 12 and its operating mechanism 23. And an operating mechanism 23.

The first bogie 7 further heats a predetermined width in the axial direction of the metal strip 1 between the first guide means 12 and the second guide device 13 at the time of thickening the metal strip 1. A first (thickening) heating device 30 having an induction heating coil 31 (for thickening) and a moving means for moving it, a third guiding device 14 and a first A second (for heat treatment) including a second (for heat treatment) induction heating coil 34 for heating a predetermined width of the metal strip 1 in the axial direction between the guide devices 12 and a moving means for moving the same. Heating device 33
Is installed. That is, a horizontal support member 36 is attached to the first carriage 7 above the upper frame 8, and guide rails 37 and 38 are provided on the upper surface thereof, and the movable carriages 40 and 41 are movably held. . And
High-frequency transformers 42 and 43 are held on the movable carts 40 and 41, respectively.
4 is held via holding members 45 and 46 held by movable carts 40 and 41, respectively, and is connected to high-frequency transformers 42 and 43, respectively. A moving means for moving at a desired speed in parallel with the processing axis line OO is connected to the moving carriages 40 and 41, respectively. Thus, each of the induction heating coils 31 and 34 surrounds the metal strip 1 held on the processing axis OO and at a desired speed (either a constant speed or a variable speed) along the metal strip 1. You can move.

Here, the moving means for moving the movable carriages 40 and 41 may be configured such that the movable carriage itself is provided with wheels and a motor for driving the wheels to rotate, and the movable carriages 40 and 41 may be self-propelled. , 41 may be provided with an external drive mechanism (for example, a screw shaft and its drive motor, etc.) for running the movable carriage. The traveling range of the movable carts 40 and 41 may be a length that allows some margin for the maximum length of the thickened region to be formed in the metal strip 1. The induction heating coil 31 for thickening moves the metal strip 1 while heating it to increase the thickness of the metal strip 1, and cools the rear of the thickened area to cool and solidify it. Cooling means for blowing a medium (for example, cooling water) is provided. In addition, the induction heating coil 34 for heat treatment
In addition, when the metal strip is moved while being heated for the heat treatment, a cooling means for blowing an appropriate cooling medium is provided so that the area immediately after the heating can be cooled at a speed required for the desired heat treatment. The induction heating coils 31, 34
Are exchangeable so that an appropriate material corresponding to the size of the metal strip 1 to be treated can be used. Therefore, when changing the size of the metal strip, it is possible to cope with metal strips of various sizes by replacing the metal strip with an appropriate one.

In FIG. 2, a clamp mechanism 49 is provided at the tip (left end in the drawing) of the first bogie 7 for holding the metal strip 1 located on the machining axis OO by holding it from left and right. . The clamp mechanism 49 is operated by a driving mechanism such as an air cylinder, and temporarily clamps the metal strip 1 when the metal strip 1 is attached to and detached from a first compression force applying head 51 described later. The first carriage 7 is used to move the metal strip 1 in the axial direction.

In FIG. 1, at one end of the rail 4, a fixed support base 50 is fixedly provided at a fixed position. The fixed support 50 fixedly holds the first compressive force applying head 51 disposed on the processing axis OO. The first compressive force applying head 51 is for applying a compressive force by engaging with the end of the metal strip 1, and is substantially the same as the metal strip 1 as shown in FIG. A long nose 51a having an outer shape and a hollow shape, a fitting portion 51b formed at the tip of the long nose 51a for loosely fitting the end of the metal strip 1, and a step 51c with which the end of the metal strip 1 inside the end abuts. are doing. In FIG. 1, the long nose 51a is formed to have a length that can penetrate the third guide device 14 and the first guide device 12 closest to the third guide device 14 when the first bogie 7 is approached.
By holding the long nose 51 a with the third guide device 14 or the first guide device 12, it is possible to heat up to the end of the metal strip 1 with the induction heating coil 31 or 34. As described above, since the long nose 51a of the first compressive force applying head 51 has substantially the same outer shape as the metal strip 1 to be treated, it is difficult to use the long nose 51a for metal strips of various sizes. Therefore, when the size of the metal strip 1 is changed, the head is replaced with a first compression force applying head having a long nose suitable for a metal strip of a new size.

In FIG. 1, a fixed support 50 of the rail 4 is shown.
A second carriage 54 is movably held near the end opposite to the end. The second bogie 54 is also movably held on the four rails 4 in the same manner as the first bogie 7, and a pinion gear that meshes with the rack 10 (see FIG. 3) provided on the rail 4, and It is provided with a motor that rotates and is capable of self-propelled to a desired position along the rail 4. Furthermore,
The second carriage 54 is provided with fixing means (not shown) for fixing the second carriage 54 to the rail 4 so as not to move. The rail 4 receives the reaction force. In addition, as this fixing means, a known means can be appropriately used, and for example, a fixing means described in JP-A-10-137841 can be used.

The second carriage 54 includes a second compression force applying head 55 disposed on the processing axis OO, and a fluid for reciprocating the second compression force applying head 55 on the processing axis OO. Pressure pusher (hydraulic servo cylinder in this embodiment) 5
6 is installed. This second compressive force applying head 55
This is for applying a compressive force by engaging with the end of the metal strip 1, and as shown in FIG. 5 (b), a long nose 55 a having substantially the same outer shape as the metal strip 1 and a tip thereof. It has a stepped portion 55b formed and abutting against the end of the metal strip 1 and an insertion section 55c that fits loosely into the metal strip 1. The long nose 55a is formed so as to penetrate the second guide device 13 and the first guide device 12 closest to the second guide device 13 when the first bogie 7 is approached. By holding the metal strip 1 at the end by the device 12 or the second guide device 13, it is possible to heat the metal strip 1 with the induction heating coil 31 or 34. When the size of the metal strip 1 is changed, the second compression force applying head 55 is also replaced with a head suitable for a metal strip of a new size.

Since the fixed support base 50 and the second carriage 54 are configured as described above, as shown in FIG.
Is engaged with the first compression force applying head 51 of the fixed support base 50, the other end is engaged with the second compression force applying head 55 of the second carriage 54, and the second carriage 54 is not moved. By operating the fluid pressure pusher 56 in the fixed state to push the second compression force applying head 55 toward the first compression force applying head 51, it is possible to apply an axial compressive force to the metal strip 1. it can. Therefore, the fixed support table 50, the first compressive force applying head 51, the second carriage 54, the second compressive force applying head 55, the fluid pressure pusher 56, and the like act on both ends of the metal strip to reduce the axial compressive force. The fluid pressure pusher 56 presses at least one of the second compression force applying head 55 and the first compression force applying head 51 toward the other, thereby compressing the metal strip in the axial direction. A pressure mechanism for applying a force is configured. Here, the fluid pressure pusher 56 has a capacity capable of applying a compressive force required for increasing the wall thickness to the metal strip 1. Further, the stroke of the fluid pressure pusher 56 is set to a length that allows an appropriate margin for the pushing length of the metal strip required to cause the metal strip 1 to have a desired thickness. .

The hydraulic pusher 56 is connected to the second carriage 54
Instead, the first compression force applying head 51 may be pushed out by being provided on the fixed support base 50. However,
In this embodiment, as described later, the core 60 is inserted into the metal strip 1 through the first compression force applying head 51, so that the fluid pressure pusher 56 does not interfere with the insertion of the core. It is provided on the second carriage 54. Further, the pressurizing mechanism is not necessarily limited to the fluid pressure pusher 56, and other known mechanisms may be used. Further, the pressurizing mechanism is not limited to the case where the pressurizing mechanism is provided on the second carriage 54 as shown in the embodiment. ,
The second compression force applying head 55 may be fixed to the second carriage 54, and the entire second carriage 54 may be pushed in a direction toward the fixed support base 50 by an appropriate means.

In FIG. 1, the fixed support base 50 further includes an expandable / reducible core 60 and a connecting rod 6 supporting the core 60.
1 and a driving device (not shown) for reciprocating the connecting rod 61 in the axial direction, and the like. It can be located at the standby position pulled into the force applying head 51 and at a desired operating position in the metal strip 1 engaged with the first compressive force applying head 51. Core 60
Means that the metal strip 1 is used at the time of thickening and heat treatment of the metal strip 1
It has a structure capable of expanding and contracting between an expanded state for restricting the inner surface of the metal strip 1 and a reduced state for insertion and removal. (Not shown).

The length of the rail 4 is determined by the first bogie 7 and the second bogie 5
4 is retracted in a direction away from the fixed support table 50 to the standby position shown in the drawing, before the thickening process is performed between the first bogie 7 and the tip of the first compressive force applying head 51 of the fixed support table 50. The metal strip 1 is set so as to secure a space where its axis can be taken in and out with its axis parallel to the processing axis OO. In this space, a holding device 63 for supplying and discharging the metal strip is provided so as to be located below the processing axis OO. This holding device 6
3 is a plurality of holding tables 64 arranged in the processing axis direction,
A conveyor 65 provided with a plurality of rollers for mounting and holding the metal strip 1 thereon and transporting the metal strip 1 in a direction parallel to the processing axis OO, and an elevating mechanism 66 for raising and lowering each of the holders 64 Etc. are provided. Here, the lifting mechanism 6
Reference numeral 6 denotes an operating position in which the holding base 64 is moved so that the central axis of the metal strip 1 held thereon coincides with the processing axis OO, and the held metal strip 1 is separated from the processing axis OO below and It is configured to be able to move up and down to a retracted position that does not interfere with the traveling of the one truck 7 and the second truck 54. Therefore, when the holding table 64 is raised to the operating position, the holding table 64 can hold the metal strip 1 at a position where the central axis coincides with the processing axis OO. The elevating mechanism 66 is provided with a position control device in the height direction, so that the holding table 64 can be stopped at an operating position corresponding to the size of the metal strip.

Although not shown, the machining axis O
On both sides of -O, the holding device 63 raised to the operating position
A centering mechanism for contacting the metal strip 1 held by the holding table 64 from both sides and positioning the horizontal position of the metal strip 1 on the processing axis OO is provided.

Before the holding device 63 (on the fixed support table 50 side)
Is provided with a conveyor 68 for taking in and out the metal strip 1 on the holding table 64 lowered to the retreat position, and is configured to pass the metal strip 1 under the fixed support table 50. . In this way, the metal strip 1 is put in and out under the fixed support base 50, so that the holding base 64 in the area surrounded by the plurality of columns 11 holding the rails 4 is externally provided. The metal strip 1 can be fed without any trouble. If the spacing between the columns 11 is large and the metal strip can be fed into the holding table 64 from the lateral direction, change the metal strip into the holding table 61 from above or from the side. You may. In that case, the metal strip 1 may be fed in a state where the holding table 64 is in the operating position.

Next, the thickening operation by the thickening apparatus having the above-mentioned structure will be described with reference to the schematic longitudinal sectional views shown in FIGS. The following operation is automatically performed by a sequence control device (not shown).

As shown in FIG. 6A, while the first bogie 7 and the second bogie 54 are stopped at the standby position at the right end of the rail 4, the holding base 64 of the holding device 63 is moved to the retracted position. And the metal strip 1 to be thickened on the holding table 64 is
It is sent in the axial direction below the fixed support table 50. Then, when the rear end of the metal strip 1 is conveyed to a position past the front end of the first compressive force applying head 51 of the fixed support table 50, the conveyance of the metal strip 1 is stopped, and FIG. As shown in b), the holding base 64 holds the metal strip 1 and moves upward, so that the axis of the metal strip 1 coincides with the processing axis OO. Next, the first carriage 7 is moved to the clamp mechanism 49 at the tip.
The metal strip 1 is advanced to a position where the end of the metal strip 1 can be gripped, and the end of the metal strip 1 is gripped by the clamp mechanism 49 at that position. Is fitted to the tip of the first compressive force applying head 51. Next, the clamp mechanism 49 releases the grip of the metal strip 1, and thereafter,
As shown in FIG. 6C, the first bogie 7 and the second bogie 54
Moves forward, and the third guide device 14, the induction heating coil 34, and the first guide device 1 that mount the metal strip 1 on the first carriage 7.
2. Pass through the induction heating coil 31, the second guide device 13, and the like. At this time, the holding base 64 at a position where it interferes with the traveling of the first bogie 7 retreats one after another, and after the first bogie 7 has passed, rises again to hold the metal strip 1.

Then, as shown in FIG. 7A, when the second carriage 54 moves forward to a position where the second compressive force applying head 55 of the second carriage 54 abuts on the end of the metal strip 1 and fits. The second carriage 54 stops at that position and is fixed to the rail 4. Thereafter, the fluid pressure pusher 56 pushes out the second compressive force applying head 55, whereby the metal strip 1 is in a state where both ends are restrained by the first compressive force applying head 51 and the second compressive force applying head 55. On the other hand, the first bogie 7 continues to advance, and stops at the position where the induction heating coil 31 is located at the thickening start position on the tip side of the metal strip 1 as shown in FIG. At this time, the induction heating coil 34, the first guide device 12, the induction heating coil 31, and the second guide device 13 mounted on the first bogie 7 are all on the left side of the first bogie 7 in the drawing. It occupies the reference position that is set at the closer position.

Next, the first guide device 12, the second guide device 1
3. Each guide roller 20 and alignment roller 21
Is set at a contracted position for restraining the metal strip 1 at a predetermined position. Further, a core 60 provided on the fixed support base 50 is provided.
Is inserted into a region where the metal strip 1 is subjected to a wall-thickening process, and is expanded when reaching a predetermined position. Thus, the preparation for the thickening process is completed.

Next, the hydraulic pressure pusher 56 starts servo operation, and the metal strip 1
In this state, the thickening induction heating coil 31 is heated along the metal strip 1 while heating the narrow area of the metal strip 1 so as to be easily plastically deformed. hand,
It moves in the direction toward the second carriage 54, and at the same time, cools by blowing a cooling medium to the rear end of the heated thickened portion. This allows
The metal strip 1 is continuously thickened. At this time, the first guide device 12 is stopped at a fixed position, but the second guide device 1
Numeral 3 moves at the same speed in the same direction in conjunction with the movement of the induction heating coil 31, and keeps the distance between the thickening deformed portion of the metal strip 1 and the alignment roller 21 almost constant. For this reason, it is possible to prevent the bent metal portion from being bent from being shifted from the machining axis OO by the thickened deformed portion. Also,
The alignment roller 21 corrects the deviation of the thickening deformed portion from the processing axis OO, and this also prevents the metal strip from bending. Since the core 60 is inserted into the metal strip 1 during the thickening process, the inner surface shape of the metal strip 1 is regulated by the core 60, and an inner surface having a desired shape can be obtained.

As shown in FIG. 7 (b), when the induction heating coil 31 moves by a desired distance to form a thickened region 1a of a predetermined length with respect to the metal strip 1, the induction heating coil 3
1 stops the energization and the movement, and at the same time, the second guide device 13 also stops. Next, the fluid pressure pusher 56 ends the servo operation, and switches to the holding mode (decompression).

Next, as shown in FIG.
Moves the induction heating coil 34 for heat treatment to the position where the post-heat treatment of the metal strip 1 is started (slightly before the start position of the thickened region 1a formed by the thickening process first), The carriage 7 stops at that position. Also, the first guide device 12
Moves to a position close to the thickened area 1a of the metal strip 1 and stops at that position, and the guide roller 20 and the alignment roller 21 hold the unthickened processed area of the metal strip 1. After that, the induction heating coil 34 for heat treatment is energized, and the induction heating coil 34 moves in the direction toward the second carriage 54 while heating the metal strip 1, and heats the metal strip 1, I do. At this time, if necessary, a cooling medium is sprayed behind the heating area to cool it. When the induction heating coil 34 moves and approaches the first guide device 12, thereafter, as shown in FIGS.
Also moves in the same direction at the same speed as the induction heating coil 34.
Then, when the induction heating coil 34 finishes passing through the region where the post heat treatment is to be performed, the energization and the movement are stopped. In the subsequent heat treatment, the core 60 is inserted into the region to be heat-treated, so that undesired thermal deformation of the metal strip 1 can be prevented. Thus, the thickening process and the heat treatment for one location of the metal strip 1 are completed.

Next, in order to increase the thickness of the other area of the metal strip 1, as shown in FIG. 8C, the first guide device 12, the second guide device 13, Induction heating coil 3
1, 34 etc. are returned to the original reference positions, and in this state, the first bogie 7 is moved to move the induction heating coil 31 for thickening to the next position where thickening is to be started. Stops at that position. In parallel with this, the second carriage 54
Is released from the rail 4, and the fluid pressure pusher 56 is retracted while being advanced toward the fixed support base 50. Then, when the fluid pressure pusher 56 is fully retracted, the second carriage 54 is stopped and fixed at that position. After that, the same operation as the previous time is repeated to
As shown in (a), a thickened region 1b is formed, and thereafter,
Heat treatment is performed on the region.

Hereinafter, by repeating the same operation, a plurality of portions of one metal strip 1 are successively subjected to a thickening process and a heat treatment is performed. Then, as shown in FIG. 9B, when the heat treatment for the final thickened region 1c is completed,
As shown in FIG. 9C, the hydraulic pressure pusher 56 is retracted to pull out the second compressive force applying head 55 from the end of the metal strip 1, and the second bogie 54 and the first bogie 7 are returned to the original standby position. To retreat. In parallel with this operation, core 6
0 is reduced in diameter and pulled out of the metal strip 1. When the clamp mechanism 49 reaches a position where the end of the metal strip 1 can be clamped during the backward movement of the first bogie 7, the clamp mechanism 49 is operated to grip the metal strip 1, and in this state, the clamp mechanism 49 grips the metal strip 1. When the carriage 7 moves backward again, the metal strip 1 is pulled, and the metal strip 1 is detached from the tip of the first compressive force applying head 51. Thereafter, the clamp mechanism 49 releases the metal strip 1, and the first strip 1 is released. The carriage 7 moves back to the original standby position. Thus, the metal strip 1 is held by only the holding table 64. The method of removing the metal strip 1 from the distal end of the first compressive force applying head 51 is not limited to the above-described method, and is fitted inside the distal end of the first compressive force applying head 51 to the fitting portion 51b. A kick-out mechanism for removing the metal strip 1 may be provided, and the kick-out mechanism may be operated to remove the metal strip 1 from the tip of the first compression force applying head 51.

Thereafter, the holding table 64 is lowered and the metal strip 1
Is lowered, and the metal strip 1 is discharged to the outside under the fixed support base 50. This completes one operation and prepares for the next metal strip. As described above, in the thickening apparatus of this embodiment, the operations of supplying, thickening, heat-treating, and discharging the metal strip to be thickened are automatically performed, greatly reducing the work load of the operator. Can be reduced.

The above embodiment shows a preferred embodiment of the present invention, and the present invention is not limited to the embodiment, and can be appropriately changed. For example, in the above embodiment, the first guide 7 is provided with the first guide device 12, the second guide device 13, and the third guide device 14, and the first guide device 12
And the second guide device 13 holds the metal strip 1, and at the time of heat treatment, the third guide device 14 and the first guide device 12 hold the metal strip 1, but instead of this, as shown in FIG. ,
The first guide device 12A is fixedly provided at one end of the first carriage 7, and an induction heating coil 31 for thickening and heat treatment is provided between the first guide device 12A and the movable second guide device 13,
The first guide device 12 </ b> A and the second guide device 13 may hold the metal strip 1 in any case of the wall thickness increase processing and the heat treatment. With this configuration, there is an advantage that the number of guide devices that hold the metal strip 1 can be reduced. However, in this case, the first guide device 12A
Two induction heating coils 31, between the second guiding device 13 and
34, the distance between the first guide device 12A and the second guide device 13 must be increased, but in the embodiment shown in FIG. 1 can be narrowed, and the embodiment shown in FIG. 1 has a higher holding accuracy of the metal strip 1 and is more effective in preventing bending. In addition, as shown in FIG. 11B, when the thickened regions 1a and 1b are formed close to the metal strip 1,
Since it is necessary to hold the region that has not been thickened by the first guide device 12A, the interval (neck portion length) d between the thickened regions 1a and 1b is not long by the induction heating coil 34 for heat treatment. In the embodiment shown in FIG. 1, as shown in FIG. 11A, the induction heating coil 31 can be positioned near the first guide device 12 to start the thickening process, so that the neck portion length d is reduced. The possible benefits are obtained.

In the above embodiment, the first bogie 7 has the induction heating coil 31 for increasing the thickness and the induction heating coil 3 for heat treatment.
4 to increase the thickness and heat treatment.
In some cases, heat treatment is not necessary, and therefore, the induction heating coil 34 for heat treatment and its related devices may be omitted. Although the core 60 is inserted into the metal strip 1, it may be omitted if the core 60 is unnecessary.

Further, in the above embodiment, the first guiding device 12
The second guide device 13 is provided with an alignment roller 21. This alignment roller 21 is extremely effective because it is likely to bend when performing a thickening process with a large thickness increase rate. However, in the case where the wall thickness increase rate is small and the bending at the time of wall thickness processing is unlikely to occur, the alignment roller 21 may be omitted and only the guide roller may be provided.

[0048]

According to the present invention as described above,
The first bogie and the second bogie are retracted away from the fixed support to form a space between the first bogie and the fixed support that is longer than the length of the metal strip, and the metal strip is inserted into the space. After the supply, the first bogie and the second bogie are advanced, and the metal strip is held by the first and second compression force applying heads respectively provided on the fixed support base and the second bogie, and the first bogie is provided. It is possible to perform an operation of moving the metal strip to a desired position in the axial direction, stopping at that position, and performing a wall-thickening process. Therefore, the first bogie is moved to one desired position with respect to the metal strip. After performing the thickening process by moving to the next desired position, by repeating the operation of moving to the next desired position and performing the thickening process, without moving the metal strip itself, the desired and multiple Can be processed to increase the thickness of parts
In addition, during the thickening process, the front and the back of the area heated by the heating device are constrained by the first guide device and the second guide device, so that it is possible to prevent the bending of the metal strip that is likely to occur during the thickening process. In addition, the bending of the final product can be extremely small.

Further, since the first guide device and the second guide device are mounted on a common first carriage, the first guide device and the second guide device are so arranged as to increase the positional accuracy of the metal strip held by both. It is possible to increase the installation accuracy of the device,
From this point, the bending caused by the thickening process can be further reduced. Further, since it is not necessary to move the metal strip much during the thickening process, good bending can be performed even for a large-diameter and heavy metal strip, and the overall length of the apparatus can be shortened.

As described above, according to the present invention, the operation of increasing the thickness of a metal strip can be automated without increasing the overall length of the apparatus, and even for a metal strip having a large diameter and a large weight.
It is possible to provide a thickening apparatus capable of favorably performing a thickening process while suppressing a bend, thereby having an effect that a significant labor saving and an improvement in productivity can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a schematic sectional view of a first bogie used in the apparatus shown in FIG.

FIG. 3 is a schematic sectional view taken along the line AA of FIG. 2;

FIG. 4 is a schematic sectional view taken along the line BB of FIG. 2;

5A is a schematic sectional view showing a first compressive force applying head of the apparatus shown in FIG. 1; FIG. 5B is a schematic sectional view showing a second compressive force applying head of the apparatus shown in FIG. 1;

FIGS. 6A, 6B and 6C are schematic cross-sectional views illustrating the operation of the embodiment shown in FIG.

FIGS. 7A, 7B and 7C are schematic sectional views illustrating the operation of the embodiment shown in FIG. 1;

FIGS. 8A, 8B and 8C are schematic cross-sectional views illustrating the operation of the embodiment shown in FIG.

FIGS. 9A, 9B, and 9C are schematic cross-sectional views illustrating the operation of the embodiment shown in FIG.

FIG. 10 is a schematic sectional view showing another embodiment of the present invention.

11A is a schematic cross-sectional view showing the positional relationship when the next thickening is started near the thickening region 1a in the embodiment of FIG. 1; FIG. , A schematic cross-sectional view showing a positional relationship when the next thickening is started near the thickening region 1a.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal strip material 2 Thickening processing device 4 Rail 5 Strut 7 1st trolley 8 Frame 12 1st guide device 13 2nd guide device 14 3rd guide device 20 Guide roller 21 Alignment roller 30 Thickness (first) Heating device 31 (First) induction heating coil for thickening 33 (Second) heating device for heat treatment 34 (Second) induction heating coil for heat treatment 50 Fixed support table 51 First compressive force applying head 54 Second bogie 55 Second compressive force applying head

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fumiaki Tada 2-17-8 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Within Dai-ichi High Frequency Industry Co., Ltd. (72) Nobuyoshi Kitayama 2-chome Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 17-8 Inside Daiichi Kogyo Kogyo Co., Ltd. (72) Inventor Osamu Mochizuki 2-17-8 Tonomachi, Kawasaki Ward, Kawasaki City, Kanagawa Prefecture Inside Daiichi Kogyo Kogyo Co., Ltd. (72) Inventor Takahiro Yoshidome Kawasaki, Kawasaki City, Kanagawa Prefecture 2-17-8, Tonomachi-ku, Daiichi High-frequency Industrial Co., Ltd. (72) Inventor Naoki Hayashi 2-17-8, Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa Prefecture F-term in Daiichi High-frequency Industrial Co., Ltd. 4E028 EA04 EA07 4E087 AA03 AA07 AA08 AA10 BA02 BA03 BA17 BA18 CA31 CB12 CC03 DB15 DB16 DB22 DB24 EB03 EC22 FB06 GA02 GA09 GA20

Claims (7)

[Claims] 1. A first carriage movable along a horizontal machining axis, a first carriage moving means for moving the first carriage, and a first carriage mounted on the first carriage, the first carriage moving the metal strip to the machining shaft. A first guide device and a second guide device that are positioned on a line and movably hold in the axial direction, and are mounted on the first bogie, and the metal strip is provided between the first guide device and the second guide device. A heating device having an induction heating coil for heating a predetermined width in the axial direction of the material and a moving means for moving the induction heating coil along the processing axis, and a heating device having both ends of the metal strip held on the processing axis. Compression means for acting to apply an axial compression force, said compression means holding a first compression force applying head engaged with one end of said metal strip and fixed at a fixed position. With a support and a second compressive force to engage the other end of the metal strip The second carriage movable along the processing axis while holding the application head, and the first compression force applying head and the second compression force applying head engaged with both ends of the metal strip, A pressurizing mechanism for applying an axial compressive force to the metal strip by pressing one of the one compressive force applying head and the second compressive force applying head toward the other. Metal strip processing machine. 2. The second guide device is held movably with respect to the first bogie along the processing axis, and further provided is a second guide device moving means for moving the second guide device. The thickening processing apparatus according to claim 1, wherein: 3. The first carriage further includes a second induction heating coil for heating a predetermined width of the metal strip in the axial direction between the first guide device and the second guide device, and a second induction coil thereof. The thickening processing apparatus according to claim 1 or 2, further comprising a second heating device including a moving unit configured to move the heating coil along the processing axis. 4. The first bogie further includes an axially movable metal strip on a side opposite to the second guide device with respect to the first guide device so as to be positioned on the processing axis. A third guiding device to be held, a second induction heating coil disposed between the third guiding device and the first guiding device, and heating a predetermined width in the axial direction of the metal strip, and a second induction heating thereof It has a second heating device provided with a second moving means for moving the coil along the processing axis, the third guide device is fixed to the first carriage, the first guide device and the second The guide device is held movably along the processing axis with respect to the first bogie, a first guide device moving means for moving the first guide device, and a second device for moving the second guide device. Guide device moving means is provided. The thickening processing apparatus according to claim 1, wherein: 5. A standby state in which the first carriage and the second carriage can form a space longer than the length of the metal strip to be thickened between the first compression force applying head of the fixed support base. A plurality of holding stands that can move back in the axial direction so that the metal strip can be moved in the space, and the axes of the metal strips that respectively hold the plurality of holding stands coincide with the processing axis. The metal strip according to any one of claims 1 to 4, further comprising a holding device including an operating position for performing the operation and a plurality of elevating mechanisms for elevating and lowering the operating position to a retracted position separated from the processing axis. Material thickening processing equipment. 6. The first carriage and the second carriage are respectively:
The metal strip member according to any one of claims 1 to 5, wherein the metal strip member is movably held by four rails provided in parallel with the processing axis at a position surrounding the processing axis. Meat processing equipment. 7. A length of at least one of the first compression force applying head and the second compression force applying head that can penetrate the first guide device, the second guide device, or the third guide device adjacent thereto. The thickening apparatus for a metal strip according to any one of claims 1 to 6, further comprising a long nose having substantially the same outer shape as the metal strip.