JP3402564B2 - Metal strip thickening processing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, in the state where a compressive force in the axial direction is applied to a metal strip such as a steel pipe, a small area in the axial direction is locally heated by an annular induction heating coil to increase the thickness and A technique is known in which the induction heating coil is moved in the axial direction with respect to the metal strip to move the thickness increasing position, so that the desired region in the axial direction of the metal strip is continuously thickened. , Japanese Patent Publication No. 2-7738). And, the device described in the above-mentioned publication as a device for carrying out this thickening processing is a press bed which is fixedly provided at a fixed position for fixing one end of the metal strip, and a pillar from the press bed. Plate fixed at a certain distance by the, the hydraulic cylinder attached to the plate, the support jig attached to the hydraulic cylinder and holding the other end of the metal strip, the press bed and the support The induction heating coil is provided so as to surround the metal strip held by the jig, and a moving carriage that moves the induction heating coil along the metal strip. Although this publication does not specifically describe the work of attaching and detaching the metal strip to and from the thickness increasing device, the worker usually performed it manually by using a crane.

[0003]

However, the metal strip to be thickened is usually extremely long (for example, 4 to 1).
5 m), as in the device described in the above publication, when the metal thickening is performed by simply holding both ends of the metal strip, the thickened portion is deformed unstablely in the direction perpendicular to the machining axis, After all, there was a problem that a bend occurred. Further, since the region to be thickened with respect to the metal strip is not necessarily at a fixed position, in the apparatus described in the above publication, the induction heating coil must be movable to the entire region in the longitudinal direction of the strip. Since the moving speed of the induction heating coil needs to be precisely controlled, it is not a good idea to increase the moving stroke of the induction heating coil. Furthermore,
In the conventional device, when the length of the metal strip changes, it cannot be easily dealt with, and there is a problem that the range of the length of the metal strip subjected to the thickness increasing process is limited.

Further, in order to attach the metal strip to the thickening apparatus, a heavy metal strip must be manually operated in a narrow place by using a crane, which requires a large number of operators and There is a problem that it imposes a large work load, requires a considerable work time, and is extremely inefficient.

The present invention has been made in view of the above-mentioned conventional problems, and it is possible to increase the thickness of a metal strip without causing bending, and for heating the metal strip. It is an object of the present invention to provide a thickening device for metal strips which can reduce the moving stroke of the induction heating coil and can easily perform thickening processing on metal strips of different lengths.

Further, according to the present invention, it is possible to efficiently set a metal strip in a predetermined processing zone for thickening the metal strip, and to take out the metal strip efficiently after the thickening process. It is also an object to provide a thickening processing device.

[0007]

In order to solve the above-mentioned problems, the present invention provides, in a processing zone for thickening a metal strip, on both sides of an induction heating coil for heating the metal strip.
A first guide device and a second guide device for holding the metal strip material movably in the axial direction on a horizontal processing axis are provided, and further, the metal strips are provided outside the first guide device and the second guide device, respectively. A first carriage that holds a first compressive force applying head that can be engaged with the end portion of the material on the side of the first guide device and that is movable along the processing axis; and a second guide device side of the metal strip. A second carriage that holds a second compression force applying head that can be engaged with an end and is movable along the processing axis is provided, and the first compression force applying head and the second compression force applying head are formed of a metal strip. In the state of being engaged with both ends of the above, by pressing one of the first compression force applying head and the second compression force applying head toward the other, a compressive force in the axial direction is applied to the metal strip. It is configured.

According to the present invention, with this structure, the first carriage and the second carriage having the first compression force applying head and the second compression force applying head, which engage with both ends of the metal strip, are mounted along the processing axis. Can be moved to a desired position by means of this, so that the first and second compressive force applying heads can be engaged with both ends of a metal strip having an arbitrary length, and thickening of the metal strip can be performed. Whatever the position of the region to be, the both ends of the metal strip can be held by the first and second compression force applying heads with the region being located at the induction heating coil. Therefore, the induction heating coil can be subjected to the desired thickness increase processing by simply moving by a length that allows for an appropriate margin in the length of the area to be subjected to the thickness increase processing. Can be set short regardless of the length of the metal strip. In addition, since the first guide device and the second guide device hold the metal strip on both sides of the induction heating coil, it is possible to prevent the metal strip from bending that tends to occur during thickening processing, and to minimize the bending of the final product. .

According to the present invention, in the apparatus having the above-mentioned structure, the first compression force applying head or the second compression force applying head holding one or both of the first carriage and the second carriage and the second compression force applying head adjacent thereto. Between the first guide device or the second guide device, the metal strip can be retracted to a standby position where a space longer than the length of the metal strip can be formed, and the metal strip is in the space in the axial direction on the processing axis. The structure is such that a holding device capable of movably holding is provided. According to the present invention, in this space,
By moving the metal strip in the direction perpendicular to the machining axis, the metal strip can be taken in and out of the machining axis, and the metal strip held on the machining axis of the space can be used as the axis line. By moving in the direction, the metal strip can be inserted into the first guide device, induction heating coil, and second guide device provided in the processing zone, and can also be pulled out by the reverse operation, thus making the metal strip efficient. Good, it can be set in a predetermined processing zone for performing the thickening process, or can be taken out efficiently after the thickening process.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A device according to a first embodiment of the present invention is a first guide device and a second guide device for holding a metal strip movably in the axial direction on a horizontal machining axis, and Heating provided with an induction heating coil arranged between the first guide device and the second guide device for heating a predetermined width in the axial direction of the metal strip and a moving means for moving the induction heating coil along the machining axis. The apparatus includes a device and a compression unit that acts on both ends of a metal strip located through the induction heating coil to apply a compressive force in the axial direction, and the compression unit includes a first guide for the metal strip. A first carriage that holds a first compression force applying head that engages with an end on the device side and is movable along the processing axis, and engages with an end of the metal strip on the second guide device side. A second compressive force holding head that is movable along the machining axis A vehicle, in a state where the first compression force applying head and the second compression force applying head are engaged with both ends of a metal strip, one of the first compression force applying head and the second compression force applying head is applied. And a pressing mechanism that applies a compressive force in the axial direction to the metal strip by pressing it toward the other side.

With this structure, a compressive force is applied to the metal strip by the compression means, and a predetermined width in the axial direction of the metal strip is heated by the induction heating coil, and the induction heating coil is moved relative to the metal strip. By moving the metal strip in the axial direction, a desired region in the longitudinal direction of the metal strip can be thickened. At this time, by arranging the first carriage and the second carriage at positions corresponding to the length of the metal strip and the position of the thickening processing region, it is possible to cope with metal strips of various lengths and to increase the thickness. It is possible to easily cope with metal strips having different regions. Further, since the first guide device and the second guide device hold the metal strip on both sides of the induction heating coil, it is possible to prevent bending of the metal strip during the thickening process.

An apparatus according to another embodiment of the present invention is the same as the apparatus according to the above-mentioned first embodiment, further including a first compressive force applying head for holding the first carriage and a first guide device. A second compression force applying head that holds the second carriage and a second guide that can be retracted to a standby position where a receiving zone having a space longer than the length of the metal strip can be formed. Between the device and the device, it is possible to retract to a standby position where a discharge zone having a space longer than the length of the metal strip can be formed, and the metal strip is provided on the machining axis in the receiving zone and the discharge zone, respectively. It is provided with a configuration in which a holding device capable of holding the movable body in the direction is provided.

According to this structure, the metal strip can be moved in the direction perpendicular to the processing axis and supplied onto the processing axis of the receiving zone with the first carriage in the standby position. The metal strip can be moved in the axial direction and set in the processing zone equipped with the first guide device, the induction heating coil, and the second guide device. Can be discharged to the outside by moving in the axial direction to the payout zone and moving from that position in the direction perpendicular to the processing axis, and the metal strip can be easily supplied and discharged.

According to still another embodiment of the present invention, instead of providing a receiving zone and a paying zone outside the first guiding device and the second guiding device, respectively, only one of them is provided with a length of metal strip. Also, a receiving and dispensing zone having a long space is provided, and a holding device capable of holding the metal strip movably in the axial direction on the processing axis is provided in the zone. In this configuration, the metal strip is first supplied to the receiving and discharging zone, moved in the axial direction on the processing axis and fed into the processing zone, and after the thickening processing, the metal strip is moved in the axial direction. To discharge the metal into the original receiving and discharging zone, and then to move it in the direction perpendicular to the processing axis to discharge the metal to the outside.
It can be easily discharged.

Here, the holding device provided in the receiving zone, the paying zone or the receiving and paying zone is held by a plurality of holding bases for holding metal strips and holding the plurality of holding bases. It is preferable to have a configuration including an operating position in which the axis of the metal strip coincides with the machining axis and an elevating mechanism for moving the metal strip to a retracted position that is separated downward from the machining axis. With this configuration, the metal strip can be taken in and out in the direction perpendicular to the predetermined machining axis by raising and lowering the holding strip while holding the metal strip on the holding strip. In addition, when moving the metal strip in the axial direction on the machining axis to move it in and out of the machining zone, each holding platform is moved sequentially according to the approaching or passing of the first truck and the second truck. It is possible to retreat to a retracted position that does not interfere with or to move to an operating position that holds the metal strip, and therefore, the first compression force applying head or the second compression force applying head at the end of the metal strip. The metal strip and the first carriage or the second carriage can be moved in a state where they are engaged with each other or in a state where they are brought close to each other.

It is preferable that the holding device is provided with a conveyor for conveying the metal strip in the axial direction. With this configuration, the metal conveyor can be moved in the axial direction by the conveyor, and the operation of moving the metal conveyor can be automated.

Further, it is preferable that at least one of the first guide device and the second guide device is movable in the axial direction of the metal strip. With this configuration, when the induction heating coil is moved along the metal strip to perform the thickness increasing process, the movable first guide device or the second guide device is positioned in the vicinity of the induction heating coil, and the induction heating coil is moved. With this, it is possible to always hold the vicinity of the portion of the metal strip where the thickness increase deformation occurs, and to prevent the bending deformation that may occur in the metal strip more favorably.

Further, the first carriage and the second carriage are movably held on four rails provided at positions surrounding the machining axis in parallel with the machining axis and self-propelled along the rails. And a fixing means for fixing the carriage to the rail, and further, one of the first carriage and the second carriage is provided with a fluid pressure pusher for driving the compression force applying head. preferable. With this configuration, the first carriage and the second carriage are self-propelled to a desired position according to the length of the metal strip and the thickening position, and fixed at that position to exert a compressive force on the metal strip. Therefore, as the movement stroke of the fluid pressure pusher, only the stroke required for increasing the thickness is sufficient, and the movement stroke of the fluid pressure pusher can be reduced. Further, the reaction force acting on the first carriage and the second carriage when the metal strip is compressed is received by the four rails provided at the position surrounding the machining axis, so that the reaction force can be stably received.

Further, at least one of the first compressive force applying head and the second compressive force applying head has a length such that it can penetrate the first guide device or the second guide device adjacent thereto.
Moreover, it is preferable that the metal strip has a long nose having substantially the same outer shape as that of the metal strip. With this configuration, the long nose holding the end of the metal strip is located at a position penetrating the first guide device or the second guide device, so that the thickening process is performed on the end of the metal strip adjacent to the long nose. Can be applied.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention shown in the drawings will be described below. FIG. 1 is a schematic vertical cross-sectional view of a thickening processing apparatus according to an embodiment in which the present invention is applied to thickening processing of a rectangular steel pipe, FIG. 2 is a schematic horizontal sectional view of the apparatus, and FIG. 3 is a processing zone of the thickening processing apparatus. FIG. 4 is a schematic vertical cross-sectional view showing a state during thickening processing. 1 to 3, 1 is a metal strip that is a rectangular steel pipe, 2 is a thickening processing device, 3 is a supply conveyor that supplies the metal strip 1 to be subjected to the thickening processing, and 4 is a thickened material A discharge conveyor that discharges metal strips.

The thickening processing device 2 is constructed so as to hold the metal strip 1 on a horizontal working axis line OO to perform a thickening work, and along the working axis line OO Cart waiting zone A, receiving zone B, processing zone C, payout zone D,
The second trolley waiting zone E is arranged in this order. In addition, the processing axis O-
Four rails 10 are provided at positions surrounding O parallel to the machining axis O-O. As will be described later, the rail 10 holds various carriages movably and receives the reaction force of the compressive force applied to the metal strip 1 during the thickening process, so that each carriage is moved to an accurate position. It is made to the required accuracy so that it can be made strong enough to withstand the reaction force, and to maintain its position accuracy,
It is held by a large number of gate-shaped columns 11 (see FIG. 6).

1 to 3, the processing zone C includes
A first guide device 12A and a second guide device 12 that hold the metal strip 1 movably in the axial direction on a horizontal machining axis OO.
B is provided. The first guide device 12A is for moving the frame 14A movably on the rail 10 so as to be movable in the machining axis OO direction, and for allowing the frame 14A to self-propel along the rail 10 at a desired speed. Drive device (not shown), and a guide roller 15A and an alignment roller 16A attached to the frame 14A thereof.

The guide rollers 15A are for holding the metal strip 1 at a position where its axis coincides with the machining axis O--O, and are provided above and below and on the left and right of the metal strip 1. Further, these guide rollers 15A have an operating mechanism (not shown) for moving the guide rollers 15A between an operating position for positioning the guide rollers 15A in contact with the metal strip 1 and a releasing position opened more than that. It is connected. The operating mechanism is not particularly limited, but one having a centering function is used in this embodiment.
That is, a feed mechanism including a combination of a screw shaft and a nut for vertically moving the guide rollers 15A is connected to the upper and lower guide rollers 15A, and the upper and lower screw shafts or nuts are connected so as to interlock with each other and are connected to a hydraulic motor or the like. It is configured to be rotationally driven by a driving device, and the moving directions of the upper and lower guide rollers 15A at that time are opposite. With this configuration, the upper and lower guide rollers 15A uniformly move in opposite directions about the machining axis O-O, and therefore move symmetrically with respect to the machining axis O-O. Thus, with the metal strip 1 inserted between the upper and lower guide rollers 15A, the upper and lower guide rollers 15A are moved toward the machining axis OO, and the metal strip 1 is sandwiched by
The metal strip 1 can be held at a position where its axis coincides with the machining axis O-O. At this time, the upper and lower guide rollers 15A are irrelevant to the size of the metal strip 1 regardless of the size of the metal strip 1.
Can be held on the machining axis O-O, so that the size change of the metal strip 1 can be directly supported. The moving strokes of the upper and lower guide rollers 15A are determined so that the metal strip material handled by this thickening apparatus can be used from the maximum size to the minimum size. The left and right guide rollers 1
A similar operating mechanism is connected to 5A.

The alignment roller 16A is for returning the center of the thickened portion to the original position when the center position of the thickened portion deviates from the machining axis OO during the thickening processing, and this is also similar to the guide roller 15A. In addition, it is provided above and below and on the left and right of the metal strip 1. Further, the alignment rollers 16A provided on the upper and lower sides and on the left and right sides are respectively provided with detection means (not shown) for detecting the deviation amount of the center position of the thickened portion of the metal strip 1 from the machining axis OO. Depending on the detection signal,
Alignment roller 16A so that the gap is eliminated
A servo mechanism (not shown) for displacing the position of is connected. As this servo mechanism, a publicly known one can be used as appropriate, but in the present embodiment, a servo cylinder is used as a means for moving the alignment roller 16A in a direction approaching and moving away from the machining axis OO. .
Alignment roller 16A with this servo cylinder
The moving stroke is defined so that the metal strip material handled by this thickening apparatus can be used from the maximum size to the minimum size. Accordingly, for metal strips of various sizes, the alignment roller 16A controls so that the center position of the thickened portion does not deviate from the machining axis O-O during the thickening process, and the metal strip is bent. Can be prevented.

The second guiding device 12B is also the first guiding device 12A.
Similarly to, the frame 14B is provided with a guide roller 15B and an alignment roller 16B attached to the frame 14B. However, unlike the first guide device 12A, the frame 14B is fixedly provided at a fixed position. ing.

First guide means 12A and second guide device 12B
An induction heating coil 20 for increasing the thickness is arranged between the two, which heats a predetermined width in the axial direction of the metal strip 1 when increasing the thickness of the metal strip 1. The thickening induction heating coil 20 is held by a moving carriage 21 via a holding member (not shown), and a high frequency transformer 22 mounted on the moving carriage 21.
Are linked to. The movable carriage 21 is configured to be movable at a desired speed in parallel with the machining axis OO direction. Thus, the induction heating coil 20 for thickening has the machining axis O-O.
It is possible to move along the metal strip 1 at a desired speed (either constant speed or variable speed) while surrounding the metal strip 1 held above. Here, the means for moving the moving carriage 21 may be configured such that the moving carriage itself is provided with wheels and a motor for driving the wheels to rotate, or it may move along the moving path of the moving carriage 21. An external drive mechanism (for example, a screw shaft and a drive motor therefor) for causing the carriage 21 to travel may be provided. The traveling range of the moving carriage 21 does not need to be set equal to the entire length of the metal strip 1 to be thickened, and some margin is allowed for the maximum length of the thickened region to be formed on the metal strip 1. Can be any length. Therefore, the traveling range of the moving carriage 21 can be shortened, and the device for moving the moving carriage 21 can be made compact. The thickening induction heating coil 20 heats the metal strip 1 and sprays a cooling medium (for example, cooling water) to the rear side of the region where the metal strip 1 has been thickened and thickened when moving while heating the metal strip for thickening processing. Equipped with cooling means. The thickening induction heating coil 20 is detachable from the moving carriage 21 and the high frequency transformer 22 so that an appropriate one depending on the size of the metal strip 1 to be processed can be used.
Therefore, when changing the size of the metal strip, it is possible to deal with metal strips of various sizes by replacing the size with a suitable one.

Between the thickening induction heating coil 20 and the second guide device 12B, the metal strip 1 is heat-treated during the heat treatment of the metal strip 1.
An induction heating coil 25 for heat treatment for heating a predetermined width in the axial direction of is arranged. This induction heating coil 2 for heat treatment
Similarly to the case of the thickening induction heating coil 20, 5 is held by the moving carriage 26 via a holding member (not shown), and the high frequency transformer 27 mounted on the moving carriage 26.
Are linked to. The moving carriage 26 is configured to move at a desired speed in parallel with the machining axis OO direction. Thus, the induction heating coil 25 for heat treatment also has the machining axis O--O.
It is possible to move along the metal strip 1 at a desired speed while surrounding the metal strip 1 held above. Also,
The induction heating coil 25 for heat treatment is also provided with a cooling means for spraying a cooling medium (for example, cooling water) to the rear side of the heated region of the metal strip 1 when moving while heating the metal strip for heat treatment. . The induction heating coil 25 for heat treatment can also be removed from the moving carriage 26 and the high frequency transformer 27. When the size of the metal strip is changed, the metal strip can be replaced with one suitable for the size. Can be used for metal strips.

The induction heating coil 20 for thickening and the induction heating coil 25 for heat treatment have a reference point at a position close to the second guide device 12B. Normally, the induction heating coil 25 and the induction heating coil 25 are stopped at the reference point, and during thickening or heat treatment, It is configured to move in the direction from the reference point toward the first guiding device 12A.

On the rail 10, the first carriage 31 is located outside the first guide device 12A and the second guide device 12B.
And the second trolley 32 are movably held, and each of the trolleys 31 and 32 includes a drive device for self-propelled along the rail 10 and a fixing means for fixing the trolley to the rail 10. . These structures will be described later.

The first carriage 31 has a first compression force applying head 33 arranged on the processing axis O-O and a fluid pressure pusher for reciprocally driving the first compression force applying head 33 on the processing axis O-O. A (hydraulic servo cylinder in this embodiment) 34 is mounted. The first compressive force applying head 33 is for applying an compressive force by engaging the end portion of the metal strip 1 held by the first guide device 12A, and as shown in FIG. Long nose 3 with the same outer shape as the metal strip 1
3a, a step portion 33b formed at the tip thereof and abutting the end of the metal strip 1, and an insertion portion 33c loosely fitted in the metal strip 1. This long nose 33a
The first guide device 12A (see FIG. 3) is formed to have a length capable of penetrating the long nose 33a.
By holding with 2A, to the end of the metal strip 1,
It is possible to heat with the induction heating coil 20 or 25. Since the long nose 33a of the first compression force applying head 33 has substantially the same outer shape as the metal strip 1 to be treated as described above, it is difficult to use it for metal strips of various sizes. Therefore, when the size of the metal strip 1 is changed, the first compression force applying head having a long nose suitable for a new size metal strip is replaced.

1 to 3, the second carriage 32 includes a second compression force applying head 36 arranged on the machining axis O--O.
Is fixedly held. This second compression force applying head 36
Is for engaging the end of the metal strip 1 held by the second guide device 12B to give a compressive force, and as shown in FIG. A long long nose 36a having a hollow shape, a fitting portion 36b formed at the tip of the long nose 36 for loosely fitting the end portion of the metal strip 1 and a step portion 36c with which the end of the metal strip 1 inside thereof abuts. ing. As can be seen clearly from FIG. 3, the long nose 36a is formed to have a length capable of penetrating the second guide device 12B.
It is possible to heat up to the end portion of the metal strip 1 by the induction heating coil 20 or 25 by holding it at.
A kick-out mechanism (not shown) for removing the metal strip 1 fitted to the fitting portion 36b is provided inside the tip of the long nose 36a. When the size of the metal strip 1 is changed, the second compressive force applying head 36 is also replaced with one suitable for a new size metal strip.

Thus, with the first carriage 31 and the second carriage 32 stopped at appropriate positions and fixed so as not to move, as shown in FIG. 3, the first compressive force is applied to both ends of the metal strip 1. By engaging the head 33 and the second compression force applying head 36 and operating the fluid pressure pusher 34 (see FIG. 1) to push the first compression force applying head 33 toward the second compression force applying head 36, A compressive force in the axial direction can be applied to the metal strip 1. Therefore, the first carriage 31, the second carriage 32, the first compression force applying head 33, the fluid pressure pusher 34, the second compression force applying head 36, etc. act on both ends of the metal strip to exert the compression force in the axial direction. The fluid pressure pusher 34 presses at least one of the first compression force applying head 33 and the second compression force applying head 36 toward the other to form an additional compression means, thereby compressing the metal strip in the axial direction. It constitutes a pressure mechanism that applies force. Here, as the fluid pressure pusher 34, one having a capacity capable of exerting a compressive force necessary for increasing the thickness on the metal strip 1 is used. Further, the stroke of the fluid pressure pusher 34 is set to a length that allows for an appropriate margin in the pushing length of the metal strip required to cause the metal strip 1 to be thickened to a desired length. .

The pressurizing mechanism is not necessarily limited to the fluid pressure pusher 34, and other publicly known pressurizing mechanism may be used. Furthermore, as shown in the embodiment, the pressurizing mechanism is provided on the first carriage 31. Not limited to this, the first compression force application head 33 may be fixed to the first carriage 31 and the entire first carriage 31 may be pushed in a direction toward the second carriage 32 by an appropriate means.

In FIGS. 1 and 2, the first carriage 31 is a first carriage waiting zone A far from the first guide device 12A.
The position of the first carriage standby zone A is such that, when the first carriage 31 retracts to the standby zone A, between the first guide device 12A and the first compression force applying head 33, It is determined that the receiving zone B having a space longer than the entire length of the metal strip 1 can be formed.
Further, the second carriage 32 can also move backward to the second carriage standby zone E far away from the second guide device 12B, and the position of the second carriage standby zone E is also the second carriage in the standby zone E. It is defined that the pay-out zone D having a space longer than the entire length of the metal strip 1 can be formed between the second guide device 12B and the second compression force applying head 36 when the 32 is retracted. Thus, with the first carriage 31 retracted to the waiting zone A, the metal strip 1 can be supplied on the machining axis OO of the receiving zone B by moving it in the direction perpendicular to the machining axis OO. It is possible to insert the metal strip 1 into the first guide device 12A, the induction heating coils 20, 25, and the second guide device 12B by moving the metal strip 1 in the axial direction on the machining axis O-O. By moving the second carriage 32 back to the standby zone E and moving the metal strip 1 for which the thickness increasing process is finished in the axial direction on the machining axis O-O, the metal strip 1 can be discharged to the payout zone D, and at that position the machining axis O −
It can be discharged by moving it in the direction perpendicular to O.

In FIG. 3, the second carriage 32 further includes a core 40 that can be expanded and contracted, and a connecting rod 41 that supports the core 40.
And a drive device 42 for reciprocally moving the connecting rod 41 in the axial direction. The drive device 42 reciprocates the connecting rod 41 to move the core 40 to the second compression force applying head 36. It can be positioned at a standby position pulled in and a desired operating position in the metal strip 1 engaged with the second compression force applying head 36. The core 40 is for restricting the inner surface shape of the metal strip 1 at the time of increasing the thickness of the metal strip 1 and at the time of heat treatment. It has a structure in which it can be expanded and contracted to a reduced diameter state, and is configured to be expanded and contracted by an expansion and contraction hydraulic cylinder (not shown).

Next, the structure for holding the first carriage 31 on the rail 10 will be described. 6 is a schematic front view of the first carriage 31 held on the rail 10, FIG. 7A is a schematic plan view of the first carriage 31, and FIG. 7B is a fixing provided on the first carriage 31. It is a schematic plan view which shows the means 53 in an open state. The first bogie 31 is provided with rollers 45 on the upper and lower sides of the side surface thereof, and by supporting the rollers 45 on the upper and lower surfaces of the rail 10, positioning is performed in the vertical direction. The first bogie 31 is also provided with wheels 48 on its upper and lower surfaces, and lateral positioning is performed by bringing the wheels 48 into contact with the side surfaces of the rail 10. The four rails 10 are provided with racks 47 on their opposite sides. On the other hand, the first trolley 3
A drive gear 49 that meshes with the rack 47 and a drive motor 50 that drives the drive gear 49 are provided on the upper surface of 1 as a drive device for self-propelling the first carriage 31.
A drive gear 49 that meshes with the rack 47 is also provided on the lower surface of the drive unit 1, and is drivingly connected to a drive motor 50. Thus, the first carriage 31 is held on the rail 10 in a state in which the axis of the first compression force applying head 33 is aligned with the machining axis OO, and the first motor 31 is driven by the drive motor 50.
You can self-run along 0.

Further, on the upper surface and the lower surface of the first carriage 31,
Fixing means 53 (only the fixing means 53 on the upper surface is shown) for fixing the carriage to the rail 10 is provided. This fixing means 53
Is a pair of braking heads 5 that are held so as to be rotatable around support shafts 55 that are respectively arranged near both sides of the first carriage 31.
6, a split pinion 57 provided on the braking head 56 and capable of meshing with the rack 47, and a booster link for rotating the pair of braking heads 56 between a position where the split pinion 57 meshes with the rack 47 and a position apart from each other. Mechanism 58
And the hydraulic cylinder 5 that drives the boosting link mechanism 58.
9 and the like, the manufacturing head 56 is swung by the hydraulic cylinder 59, and the split pinion 57 is engaged with the rack 47 as shown in FIG. On the other hand (in normal use, since the fixing means on the lower surface side of the trolley 31 is also activated at the same time, the trolley 31 can be fixed so as not to move), and as shown in FIG. As shown, by separating the split pinion 57 from the rack 47, the first carriage 31
Can be movable along the rail 10.

Here, the pair of braking heads 56 are provided symmetrically with respect to the central axis of the first bogie 31, and the boosting link mechanism 58 has a drive block 58a which reciprocates in the central axis direction and both ends thereof. In a state in which the pair of symmetrically linked links 58b are provided and the pair of braking heads 56 are engaged with the racks 47 on both sides [the state shown in FIG. 7 (a)], the links 58b on both sides are substantially perpendicular to the central axis. The dimensions are set so that By adopting this configuration,
At the time of thickening, a large reaction force in the direction of the central axis acts on the first bogie 31, and when the pair of braking heads 56 meshing with the rack 47 receives a reaction force in the direction of disengaging from the rack 47, As shown in FIG. 7 (a), the reaction forces act in opposite directions on the drive block 58a via a link 58b substantially perpendicular to the central axis, and thus,
It is canceled in the drive block 58a. Therefore, the reaction force hardly acts on the hydraulic cylinder 59 that drives the drive block 58a, and even if a large reaction force is generated on the pair of braking heads 56, the reaction force is not increased without increasing the capacity of the hydraulic cylinder 59. Thus, the pair of braking heads 56 can be held in a state of being meshed with the rack 47.

Although the braking head 56 having the split pinion 57 that meshes with the rack 47 is used as the fixing means 53 in the above-described embodiment, the fixing means 53 is not limited to this structure and can be changed as appropriate. For example, drive gear 49
May be locked by an appropriate means. However, the configuration of the illustrated embodiment is preferable because the first bogie 31 can be fixed to the rail 10 with a large restraining force with a relatively simple configuration.

The second carriage 32 can also be self-propelled with respect to the rail 10 by the same mechanism as the first carriage 31 and can be fixed at an arbitrary position. In addition, the first guidance device 12A
Also, the same mechanism as that of the first bogie 31 enables self-propelling with respect to the rail 10. However, the first guide device 12A is rail 1
Since it is not necessary to strongly fix it to 0, the fixing means 5
No. 3 is not necessary, and a motor with a brake is used as a drive motor for simply moving the motor.

In FIGS. 1 and 2, the receiving zone B is provided with a holding device 60 for supplying a metal strip so as to be located below the processing axis line OO. This holding device 6
0 is a plurality of holding bases 61 arranged in the processing axis direction,
It is equipped with a carrier conveyor 62 that is attached to the holding table 61, holds the metal strip 1 and holds it, and carries a plurality of rollers that carry it in the direction parallel to the processing axis, and an elevating mechanism 63 that raises and lowers each holding table 61. ing. Here, the elevating mechanism 63 causes the holding base 61 to be in an operating position in which the central axis of the metal strip 1 held on the holding platform 61 coincides with the machining axis OO, and the metal strip 1 held by the lifting mechanism 63 moves from the machining axis OO. Separated downward and the first trolley 3
It is configured to be able to move up and down to a retracted position (position shown in FIG. 1) which is lower than the traveling position of 1. Therefore,
When the holding table 61 is raised to the operating position, the holding table 61 allows the metal strip 1 to be inserted into the first guiding device 12A from the outside of the first guiding device 12A on the machining axis OO. Can be held movably. The elevation mechanism 63 is provided with a position control device in the height direction so that the holding base 61 can be stopped at an operating position corresponding to the size of the metal strip.

Further, in the receiving zone B, the metal strip 1 held at the same height as the machining axis OO by the holding table 61 of the holding device 60 which is raised to the operating position is contacted from both sides, A centering mechanism for positioning the horizontal position of the metal strip 1 on the machining axis OO is provided. FIG. 8 is a schematic plan view showing an example of this centering mechanism. The centering mechanism indicated by reference numeral 65 includes a pair of swing arms 67 symmetrically arranged on both sides of the machining axis OO and pivotable about a fulcrum 66.
The guide roller 6 held at the tip of the swing arm 67
8 and a hydraulic cylinder 69 for rotating a pair of swing arms 67 in synchronization with each other, and a plurality of such centering mechanisms 65 are provided along the machining axis OO.

In FIG. 1, in the first trolley waiting zone A located between the receiving zone B and the supply conveyor 3, the metal strip 1 is placed in the direction parallel to the machining axis below the region where the first trolley 31 is located. A transfer conveyor 64 is provided for transferring the sheet to. The height of the transport conveyor 64 is set to be the same as the height of the transport conveyor 62 of the holding table 61 lowered to the retracted position.

In FIGS. 1 and 2, the supply conveyor 3 is
A roller conveyor 3a which is arranged below the processing axis OO and conveys the metal strip 1 in a direction parallel to the processing axis OO;
The machining axis OO is arranged adjacent to the roller conveyor 3a and holds the metal strip 1 in parallel with the machining axis OO.
A belt conveyor 3b that conveys the metal strip 1 from the belt conveyor 3b at a right angle to the roller conveyor 3a.
A transfer means (not shown) for transferring on top is provided. The height of the roller conveyor 3a is set to be equal to the height of the transfer conveyor 64. Thus, when one metal strip 1 is supplied onto the roller conveyor 3a of the supply conveyor 3,
The metal strip 1 can be supplied to the transport conveyor 64 adjacent to the roller conveyor 3a, and then the transport conveyor 64 can supply the metal strip 1 onto the transport conveyor 62 of the holding table 61 in the retracted position. .

In this embodiment, as described above, the metal strip 1 to be thickened is moved through the first carriage standby zone A in parallel with the machining axis O-O, so that the holding base 6 is moved.
1 has been adopted to supply the above. By adopting this configuration, a large number of gate-shaped columns 11 holding the rail 10 are provided.
(See FIGS. 6 and 7) Holding table 61 in the area surrounded by
The metal strip 1 can be fed from the outside without any trouble. If the space between the columns 11 is large and the metal strip can be fed to the holding base 61 from above or from the lateral direction, the metal strip can be fed from above or from the horizontal direction to the holding platform 61. You may change it. In that case, the metal strip 1 may be fed in with the holding table 61 in the operating position.

The dispensing zone D is also provided with a holding device 70 for discharging the metal strip so as to be located below the machining axis OO. This holding device 70 is also provided with a plurality of holding bases 71 arranged in the machining axis direction, and a plurality of rollers attached to the holding bases 71 for holding the metal strip 1 and conveying it in the direction parallel to the machining axis OO. A transfer conveyor 72 including
An elevating mechanism 73 for elevating and lowering each holding table 71 and the like are provided. Here, the elevating mechanism 73 causes the holding base 71 to be in an operating position where the central axis of the metal strip 1 held on the holding base 71 coincides with the machining axis O-O, and the held metal strip 1 has the machining axis O-O.
It is configured to be able to move up and down to a retracted position (position shown in FIG. 1) that is further lowered and is lower than the traveling position of the second carriage 32. Therefore, when the holding base 71 is raised to the operating position, the holding base 71 is movable so as to discharge the metal strip 1 on the machining axis OO from the second guide device 12B to the outside. Can be held. The elevation mechanism 73 is also provided with a position control device in the height direction so that the holding base 71 can be stopped at an operating position according to the size of the metal strip.

In order to convey the metal strip 1 to the second carriage waiting zone E located between the payout zone D and the discharge conveyor 4 below the region where the second carriage 32 is located, in the direction parallel to the machining axis. Is provided. The height of the transport conveyor 74 is determined to be the same as the height of the transport conveyor 72 of the holding table 71 lowered to the retracted position. Further, the discharge conveyor 4 is also disposed below the processing axis O-O, and is arranged adjacent to the roller conveyor 4a that conveys the metal strip 1 in a direction parallel to the processing axis O-O and the metal conveyor. A belt conveyor 4b that conveys the material 1 in a direction perpendicular to the machining axis OO while holding the material 1 parallel to the machining axis OO, and a transfer that transfers the metal strip 1 on the roller conveyor 4a to the belt conveyor 4b. Means (not shown) are provided. The height of the roller conveyor 4a is
The height is set equal to the height of the transport conveyor 74. Thus, the transfer conveyor 72 of the holding table 71 in the retracted position
However, the metal strip 1 held on it is conveyed by the conveyor 7
4 and the transport conveyor 74 can further discharge it onto the roller conveyor 4a of the discharge conveyor 4. Even in this case, if the spacing between the columns 11 holding the rails 10 is large and the metal strip can be discharged upward or laterally with respect to the holding base 71,
The metal strip may be discharged upward or laterally with respect to the holding base 71. In that case, the holding table 71
Alternatively, the metal strip may be discharged in the operating position.

Next, the thickness increasing operation by the thickness increasing 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).

Step a: Initial state [see FIG. 9 (a)] The initial state is as follows. 1st bogie 31 ... Stops in 1st bogie standby zone A 2nd bogie 32 ... Stops in 2nd bogie standby zone E 1st guide device 12A ... Stops at reference point Guide Roller, Alignment Roller ... Retaining Stand 61 of Releasing State Supply Holding Device 60 ... Retracting Position Ejecting Position Holding Device 71 ... Retracting Position Core 40 Position ... Inside Second Car 32 The state of the retractable core 40: Reduced state Fluid pressure pusher 34: Reduced position Induction heating coil 20 for increasing the wall thickness: Stop at the reference point Heat treatment induction heating coil 25: Stop at the reference point

Step b: Preparation 1 for receiving the blank tube [Fig. 9
(B)] The first guide device 12A moves toward the thickening induction heating coil 20 and stops at the initial position in the vicinity thereof. This initial position is a fixed position regardless of the size of the metal strip.

Step c: Preparation for receiving blank tube 2 [Fig. 9
Refer to (c)] The second carriage 32 is released from the fixation to the rail 10, and the second carriage 32 moves toward the second guide device 12B, depending on the length of the metal strip and the position to be thickened. It stops at the set predetermined position. Here, the stop position of the second carriage 32 is the position where the thickening process of the metal strip should be started when the metal strip is engaged with the tip of the second compression force applying head 36 of the second truck 32. Induction heating coil 20 for thickening at which is the reference point
It is set so that it almost coincides with the position of. In the illustrated embodiment, the case where the thickening is performed from the vicinity of the end of the metal strip is shown. Therefore, the second compressive force applying head 36 attached to the second carriage 32 penetrates the second guide device 12B. It is in a state of being held by the guide roller 15B and the alignment roller 16B. It should be noted that when the thickening process is performed on the center of the metal strip, the second compression force applying head 36 is located outside the second guide device 12B. When the second carriage 32 moves to a predetermined position and stops, the fixing means (having the same structure as the fixing means 53 in FIG. 7) operates to fix the second carriage 32 to the rail 10.

Step d: Bringing in the raw pipe 1 [see FIG. 9 (d)] By this time, as shown in FIGS. 1 and 2, the raw pipe to be thickened on the roller conveyor 3a of the supply conveyor 3 A certain metal strip 1 is supplied. Then, the roller conveyor 3a, the transfer conveyor 64, and the transfer conveyor 62 start rotating, and the metal strip 1 on the roller conveyor 3a is sent to the transfer conveyor 62 on the holding table 61 via the transfer conveyor 64, and the metal strip When the material 1 reaches the position shown in FIG. 9D (that is, within the receiving zone B), the conveyor 62
Stops.

Step e: Raw tube loading 2 [see FIG. 10 (e)] Next, the elevating mechanism 63 raises the holding table 61 to match the height of the axis of the metal strip 1 with the machining axis OO. , Stop at that position. Next, the centering mechanism 65 (see FIG. 8) operates to make the horizontal position of the axis of the metal strip 1 coincide with the machining axis OO. As a result, the axis of the metal strip 1 held by the transport conveyor 62 of the holding table 61 exactly coincides with the processing axis O-O. After that, the centering mechanism 65 separates to both sides of the metal strip 1.

Step f: Mounting of the raw pipe on the machine 1 [see FIG. 10 (f)] Next, the conveyor 62 on the holding table 61 is operated to move the metal strip 1 in the axial direction to the first guide device 12A. And the metal strip 1 is inserted into the first guide device 12A and the induction heating coils 20 and 25.

Step g: Mounting of the raw pipe on the machine 2 [see FIG. 10 (g)] Next, the fixation of the first carriage 31 to the rail 10 is released,
The first carriage 31 moves toward the first guiding device 12A,
The tip of the first compressive force applying head 33 is inserted into the end of the metal strip 1. After that, the first carriage 31 continues to move, the metal strip 1 is moved forward, and the tip end thereof is moved to the second compression applying head 36.
Insert it at the tip of. The holding table 61 holding the metal strip 1 descends when the rear end of the metal strip 1 passes,
Retract to a position that does not interfere with the passage of the first carriage 31. The first carriage 31 stops when it moves to a predetermined position according to the stop position of the second carriage 32 and the length of the metal strip 1, and the fixing means 53 (see FIG. 7) operates at that position to activate the first carriage 31. 31 is fixed to the rail 10. After that, the fluid pressure pusher 34 is pressed to apply a small pressing force to the first compression force applying head 33. As a result, both ends of the metal strip 1 are securely fitted to the first compression force applying head 33 and the second compression force applying head 36. After that, the first guiding device 12A and the second guiding device 12
The guide rollers 15A and 15B of B and the alignment rollers 16A and 16B are set to the tightening position for restraining the metal strip 1, the first and second compression force applying heads 33 and 36, and the like.

Step h: Start of thickening process [Fig. 10
(See (h)] The core 40 provided on the second carriage 32 is the metal strip 1
It is inserted inside the region to be subjected to the thickness increasing process, and the diameter is expanded when it reaches a predetermined position. Next, the fluid pressure pusher 34 starts the servo operation to apply the compression force necessary for increasing the thickness to the metal strip 1 via the first compression force applying head 33, and in this state, the induction heating coil 20 for increasing the thickness. However, while heating the narrow region of the metal strip 1 so as to be easily plastically deformed, the metal strip 1
Along the direction of the arrow, and at the same time, a cooling medium is sprayed on the rear end of the thickened portion to be cooled. As a result, the metal strip 1 is continuously thickened. At this time, the first guidance device 1
2A moves at the same speed in the direction of the arrow in conjunction with the movement of the induction heating coil 20 for thickening, and keeps the interval between the thickened deformed portion of the metal strip 1 and the alignment roller 16A substantially constant. . For this reason, the increased thickness deformed portion is the machining axis O
It is prevented that the metal strip is bent from being displaced from -O. In addition, the alignment rollers 16A and 16B
Corrects the deviation from the processing axis O-O in the thickened and deformed portion, and also from this point, the bending of the metal strip is prevented. Since the core 40 is inserted inside the metal strip 1 during the thickening process, the inner surface shape of the metal strip 1 is restricted by the core 40, and the inner surface having a desired shape can be obtained.

Step i: End of thickening processing [Fig. 11
(I)] When the thickened region having a predetermined length is formed on the metal strip 1, the thickening induction heating coil 20 stops energization and movement, and at the same time, the first guide device 12A also stops. Next, the fluid pressure pusher 34 ends the servo operation and switches to the holding mode (pressure reduction).

Step j: Post heat treatment 1 [see FIG. 11 (j)] The induction heating coil 25 for heat treatment is moved to a position where the post heat treatment of the metal strip 1 is started.

Step k: Post-heat treatment 2 [see FIG. 11 (k)] The induction heating coil 25 for heat treatment is energized, and the induction heating coil 25 moves in the direction of the arrow while heating the metal strip 1. The metal strip 1 is heated and heat-treated. At this time, if necessary, a cooling medium is blown behind the heating region to cool it. When the induction heating coil 25 for heat treatment has finished passing through the region where the post heat treatment is to be performed, energization and movement are stopped. Even during the subsequent heat treatment, the core 40 is inserted inside the region to be heat-treated, so that undesired thermal deformation of the metal strip 1 can be prevented.

Step l: Removal of thickening pipe 1 [Fig. 11
(L)] Guide rollers 15A and 15B of the first guide device 12A and the second guide device 12B, alignment rollers 16A and 16
Release B.

Step m: Removal of thickening pipe 2 [Fig. 12
(See (m)] The fluid pressure pusher 34 contracts, and the first compression force applying head 3
3 is returned to the origin position with respect to the first carriage 31. As a result, the tip end of the first compression force applying head 33 has the metal strip 1
Is pulled out from the end of. Then, the fixation of the second carriage 32 to the rail 10 is released, and the second carriage 31 self-propels toward the standby zone E. At this time, the end of the metal strip 1 is fitted into the second compression force applying head 36, and therefore the metal strip 1 also moves in the direction of the payout zone D together with the second carriage 31. Do it. At this time, payout zone D
As the second carriage 31 passes by, the holding table 71 provided on the upper side sequentially rises to support the metal strip 1 and prevent the metal strip 1 from hanging down. When the second carriage 32 reaches the standby zone E, the second carriage 32 stops at that position and the fixing means operates to fix the second carriage 32 to the rail 10.

Step n: Removal of thickening pipe 3 [Fig. 12
See (n)] The core 40 has a reduced diameter and is pulled out from the metal strip 1. Next, the kick-out mechanism provided at the tip of the second compressive force applying head 36 operates to remove the metal strip 1 from the tip of the second compressive force applying head 36. As a result, the metal strip 1 is held in the payout zone D only by the holding table 71. Further, in parallel with these operations, the fixation of the first carriage 31 to the rail 10 is released, the first carriage 31 self-propels, returns to the original standby zone A, and is fixed to the rail 10.

Step o: Carrying out the thickened pipe [Fig. 12 (o)]
Reference] The holding table 71 holding the metal strip 1 descends, and the metal strip 1
Is moved below the machining axis O-O. After that, the transport conveyor 72 on the holding table 71 sends the metal strip 1 in the axial direction and sends it to the adjacent transport conveyor 74 (see FIGS. 1 and 2). After that, the transport conveyor 74 transports the metal strip 1 to a predetermined place.

Step p: Return to initial state [Fig. 12
(P)] The induction heating coils 20 and 25 return to their initial positions (reference points) and stop. By the above, the original initial state is returned to prepare for the next operation.

As described above, in the wall thickness increasing apparatus of this embodiment, the metal strip 1 to be subjected to the wall thickness increasing process can be automatically supplied, the wall thickness increasing process and the discharge can be carried out, so that the work load on the operator is reduced. It can be reduced significantly.

It should be noted that the above embodiment shows a preferred mode of the present invention, and the present invention is not limited to this, and can be appropriately modified. For example, in the above-described embodiment, the thickening induction heating coil 20 and the heat treatment induction heating coil 25 are provided in the working zone C to perform the thickening work and the heat treatment, but there is a case where the heat treatment is not necessary. ,
The induction heating coil 25 for heat treatment and the apparatus related thereto may be omitted. Although the core 40 is inserted into the metal strip 1, it may be omitted if the core 40 is unnecessary.

Further, in the above embodiment, the first guiding device 12
A and the second guide device 12B to the alignment roller 16
A and 16B are provided. This alignment roller 1
6A and 16B are very effective because bending is likely to occur when performing a thickening process with a large thickening rate. However, when the thickness increase rate is small and bending is unlikely to occur during the thickness increase process, the alignment rollers 16A, 16B
May be omitted, and only the guide roller may be provided.

In the above embodiment, the first guiding device 12A is also used.
Is configured to be movable and the second guide device 12B is fixed, but conversely, the first guide device 12A may be fixed and the second guide device 12B may be movable. Both the device 12A and the second guide device 12B may be movable. Further, both the first guide device 12A and the second guide device 12B may be fixed at positions spaced apart from the length of the thickened portion formed on the metal strip.

Further, in the above embodiment, the receiving zone B and the payout zone D are provided on both sides of the processing zone C, but one of them can be omitted. For example, it is also possible to provide only the receiving zone B of the processing zone C on the side of the first carriage 31 and use the zone B as a receiving and paying-out zone that can be used for both supply and discharge of the metal strip. With this configuration, there is an advantage that the length of the thickness increasing device 2 can be shortened. On the other hand, as in the illustrated embodiment, when the receiving zone B and the payout zone D are provided on both sides of the processing zone C, the length of the thickness increasing processing device 2 becomes long, but the flow of the metal strip is in one direction. Therefore, there is an advantage that a new metal strip can be efficiently supplied and the metal strip that has undergone the thickening process can be efficiently discharged.

[0070]

The present invention is carried out in the form described above, and has the following effects.

On both sides of the induction heating coil for heating the metal strip, a first guide device and a second guide device for holding the metal strip movably in the axial direction on a horizontal machining axis are provided, and further,
A first compression force applying head capable of engaging with the end of the metal strip on the side of the first guide device is held outside the first guide device and the second guide device, respectively, and moves along the machining axis. A possible first trolley, and a second trolley that is movable along the processing axis while holding a second compression force applying head that can be engaged with the end of the metal strip on the second guide device side, By applying a compressive force in the axial direction to the metal strip, it is possible to perform thickening processing on the metal strip of any length and on any position of the metal strip. In addition, the moving stroke of the induction heating coil can be set short regardless of the length of the metal strip, which has the effect of simplifying the structure of the device. In addition, since the first guide device and the second guide device hold the metal strip on both sides of the induction heating coil, it is possible to prevent the metal strip from bending that tends to occur during thickening processing, and the bending of the final product is extremely small. it can.

In addition, a stand-by capable of forming a receiving zone having a space longer than the length of the metal strip between the first compressing force applying head holding the first carriage and the first guide device. Between the second compressing force applying head and the second guide device holding the second carriage, which is capable of retracting to a position.
Retractable to a standby position that can form a dispensing zone with a space longer than the length of the metal strip, and hold the metal strip in the receiving zone and the dispensing zone so as to be movable in the axial direction on the processing axis. By providing a holding device that can be operated, the metal strip is fed on the machining axis of the receiving zone in the direction perpendicular to the machining axis with the first carriage in the standby position. Then
Then, the metal strip can be moved in the axial direction to be set in the processing zone equipped with the first guide device, the induction heating coil, and the second guide device, and after the thickness increase processing, the second carriage is retracted to the standby position, The metal strip can be discharged to the outside by moving it in the axial direction to the pay-out zone and moving it from that position in the direction perpendicular to the machining axis. It can be carried out in a short time and can be easily automated, resulting in significant labor saving and productivity improvement.

Further, a receiving and dispensing zone having a space longer than the length of the metal strip is provided outside one of the first guide device and the second guide device, and the metal strip is provided in the zone on the processing axis. With the configuration that the holding device capable of holding movably in the axial direction is provided,
First supply the metal strip to the receiving and discharging zone, move it axially on the machining axis to feed it into the machining zone, and after thickening the metal strip, move it axially to the original receiving In addition, the metal strip can be supplied and discharged easily and in a short time by performing the operation of discharging the metal strip to the discharge zone and moving it in the direction perpendicular to the processing axis from the discharge zone to the outside. Therefore, it is possible to greatly reduce labor and improve productivity.

Further, the holding device provided in the receiving zone, the payout zone or the receiving and paying zone described above,
A plurality of holding bases on which metal strips are placed and held, and the plurality of holding bases are moved to an operating position where the axis of the held metal strips coincides with the machining axis and a retracted position which is separated downward from the machining axis. By providing a lifting mechanism that allows the metal strip to be held on the holder, the holder is raised and lowered to move the metal strip in a direction perpendicular to the predetermined processing axis. It can be taken in and out and does not require a separate device for loading the metal strip. In addition, when moving the metal strip in the axial direction on the machining axis to move it in and out of the machining zone, each holding platform is moved sequentially according to the approaching or passing of the first truck and the second truck. It is possible to retreat to a retracted position that does not interfere with or to move to an operating position that holds the metal strip, and therefore, the first compression force applying head or the second compression force applying head at the end of the metal strip. The metal strip and the first carriage or the second carriage can be moved with or without the metal strip being engaged, and the feeding operation of the metal strip to the processing zone and the discharging operation from the processing zone. Can be carried out promptly, and the cycle time for thickening processing can be shortened to improve productivity.

Further, by providing the holding device with a conveyer conveys the metal strip in the axial direction, the metal conveyer can be moved in the axial direction by the conveyer. The movement work of can be automated.

Further, by making at least one of the first guide device and the second guide device movable in the axial direction of the metal strip, the metal strip is thickened at the time of thickening processing. Since the vicinity of the deformed portion can be always held, the bending deformation that may occur in the metal strip can be prevented more favorably, and a good product without bending can be obtained.

Further, the first carriage and the second carriage are movably held on four rails provided at positions surrounding the machining axis in parallel with the machining axis, and self-propelled along the rails. And a fixing means for fixing the carriage to the rail, and further, one of the first carriage and the second carriage is provided with a fluid pressure pusher for driving the compression force applying head. One truck and a second truck,
It can be self-propelled to a desired position according to the length of the metal strip and the thickening position, and can be fixed at that position to exert a compressive force on the metal strip, so that the movement of the first carriage and the second carriage Is automated, and the work load is further reduced. Further, the movement stroke of the fluid pressure pusher can be reduced, and the device can be downsized. Further, since the reaction force acting on the first carriage and the second carriage when the metal strip is compressed is received by the four rails provided at the position surrounding the processing axis, the reaction force can be stably received.

Further, at least one of the first compressive force applying head and the second compressive force applying head has such a length that it can penetrate the first guide device or the second guide device adjacent thereto.
And by providing the long nose having substantially the same outer shape as the metal strip, the long nose holding the end of the metal strip can be positioned to penetrate the first guide device or the second guide device, It is possible to increase the thickness of the metal strip adjacent to the long nose.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a thickening processing apparatus according to a preferred embodiment of the present invention.

FIG. 2 is a schematic horizontal sectional view of the thickening processing device.

FIG. 3 is a schematic vertical cross-sectional view showing a processing zone of the thickness increasing processing apparatus in a state during thickness increasing processing.

FIG. 4 is a schematic sectional view of a first compression force applying head.

FIG. 5 is a schematic sectional view of a second compressive force applying head.

FIG. 6 is a schematic front view of the first bogie.

FIG. 7 (a) is a schematic plan view of a first carriage, and FIG. 7 (b) is a schematic plan view showing a fixing means provided in the first carriage in a released state.

FIG. 8 is a schematic plan view of a centering mechanism.

9 (a), (b), (c), and (d) are schematic vertical sectional views for explaining the operation of the above embodiment.

10 (e), (f), (g), and (h) are schematic vertical sectional views for explaining the operation of the above embodiment.

11 (i), (j), (k), and (l) are schematic vertical sectional views for explaining the operation of the above embodiment.

12 (m), (n), (o), and (p) are schematic vertical sectional views for explaining the operation of the above-described embodiment.

[Explanation of symbols]

1 metal strip 2 thickening machine 3 supply conveyor 4 discharge conveyor 10 rails 11 props 12A First guidance device 12B Second guidance device 14A, 14B frame 15A, 15B Guide roller 16A, 16B alignment roller 20 Induction heating coil for thickening 21 Mobile trolley 25 Induction heating coil for heat treatment 26 Mobile trolley 31 first trolley 32 second trolley 33 First compression force applying head 34 Fluid pressure pusher 36 Second compression force applying head 45 rolls 47 racks 49 drive gear 50 drive motor 53 Fixing means 56 braking head 57 split pinion 58 Boost Link Mechanism 59 hydraulic cylinder A first trolley waiting zone B acceptance zone C processing zone D payout zone E second trolley waiting zone

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-223115 (JP, A) JP-A-2-200324 (JP, A) JP-A-62-45442 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B21C 37/00 B21C 37/16 B21J 5/08

Claims (8)

(57) [Claims] 1. A first guide device and a second guide device for holding a metal strip movably in the axial direction on a horizontal machining axis, and the first guide device and the second guide device are arranged between the first guide device and the second guide device.
A heating device equipped with an induction heating coil for heating a predetermined width in the axial direction of the metal strip and a moving means for moving the induction heating coil along the machining axis, and a metal strip positioned penetrating the induction heating coil. Compression means for acting on both ends of the material to apply a compressive force in the axial direction, the compression means comprising:
A first carriage that holds a first compression force applying head that engages with an end portion of the metal strip on the side of the first guide device and is movable along the processing axis, and a second guide device for the metal strip. A second carriage that holds a second compression force applying head that is engaged with the end on the side and is movable along the processing axis, and the first compression force applying head and the second compression force applying head are metal strips. With either end of the first compression force applying head or the second compression force applying head pressed toward the other, the metal strip is applied with an axial compression force. An apparatus for thickening a metal strip, which is provided with a pressure mechanism. 2. The first trolley can be retracted to a standby position where a receiving zone longer than the length of the metal strip can be formed between the first compressing force applying head and the first guide device held by the first trolley. Yes, the second carriage is retractable to a standby position that can form a payout zone longer than the length of the metal strip between the second compression force applying head and the second guide device that are held,
The holding device capable of holding a metal strip movably in the axial direction on the processing axis is provided in each of the receiving zone and the payout zone. Thickening equipment. 3. A first compression force applying head or a second compression force applying head held by one of the first carriage and the second carriage and a first guide device or a second guide device on the side close to the head. Retractable to a standby position capable of forming a receiving and discharging zone that is longer than the length of the metal strip, and holding the metal strip in the receiving and dispensing zone so as to be movable in the axial direction on the processing axis. The thickening device for a metal strip according to claim 1, wherein a holding device capable of 4. The holding device, wherein the holding device holds a plurality of holding bases on which metal strips are mounted, and the plurality of holding bases. The thickening device for metal strips according to claim 2 or 3, further comprising an elevating mechanism that elevates and lowers to a retracted position that is apart from the axis. 5. The thickening device for a metal strip material according to claim 2, wherein the holding device includes a transport conveyor for transporting the metal strip material in the axial direction. . 6. The metal strip according to claim 1, wherein at least one of the first guide device and the second guide device is movable in the axial direction of the metal strip material. Material thickening processing equipment. 7. The first bogie and the second bogie, respectively,
A driving device that is movably held on four rails that are provided parallel to the machining axis at a position surrounding the machining axis and that is self-propelled along the rails, and a fixing unit that fixes a carriage to the rails. 7. The metal strip according to claim 1, further comprising a fluid pressure pusher for driving a compression force applying head provided on one of the first carriage and the second carriage. Material thickening processing equipment. 8. The metal strip having a length such that at least one of the first compression force applying head and the second compression force applying head can penetrate the first guide device or the second guide device adjacent thereto. 8. The thickening device for metal strips according to claim 1, further comprising a long nose having substantially the same outer shape as that of.