JPH06277752A - Stretch type tube making device - Google Patents

Abstract

PURPOSE:To make a tube having highly precise thickness regardless of variance of thickness of a strip material. CONSTITUTION:The strip material 3 sent out of an uncoiler 2 is formed to be tube like shape and welded at its seam to be a tube material 3a by a forming machine 22 during transfer process and the tube material 3a is coiled by a coiling machine 23 on an almost horizontal plane. The highly precise tube is made regardless of thickness of the strip material since transferring force in the forming machine is substantially supplied by coiling force of the coiling machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension-type pipe forming apparatus which roll-forms a raw material while pulling it by a horizontal winding-type winder.

[0002]

2. Description of the Related Art Tubular materials such as ultra-precision copper pipes and copper alloy pipes used for electronic parts for low-power applications are usually made by continuously rolling a band-shaped material and welding the joints. The conventional pipe forming apparatus 1 shown in FIG. 3 conveys the band-shaped material 3 wound around the uncoiler 2 rotating in the vertical plane while being roll-formed into a tubular shape by the molding machine 4, and at a position near the final stage. After the seam is welded, the material 3 finished into the pipe material 3a is wound by the vertically winding winding drum 5. The molding machine 4 guides the material 3 sent out from the uncoiler 2 to the entrance guide roller 7 installed on the main body bed 6, and then sequentially conveys it to the first stage roll stand 9 and the side roll stand 10 via the hoop guide 8. . Material 3 molded in the shape shown in Fig. 4 (A) at the first stage
4A to 4C in the roll stand 9 and the side roll stand 10 of the subsequent second to fourth stages.
Roll molding is performed into the shape shown in FIG. The material 3 formed in the circular tubular shape shown in FIG. 4 (E) by the roll stand 9 of the fifth stage is guided by the subsequent seam guide stand 11 to the seam running in the transport direction, and then the squeeze stand. At 12, the seam is welded by a welding torch 13. Material 3 with pipe 3a welded at the seam
Passes through the roll stand 14 for ironing, leaves the main body bed 6, and is finally wound up by the winding drum 5.

The forming rolls used in the roll stands 9 and 14 and the side roll stand 10 are all driven by motor power, and the forming rolls at each stage serve both to form and convey the material 3. Further, the winding drum 5 is also driven to rotate by a dedicated motor (not shown), and winds the material 3 molded into the pipe material 3a.

[0004]

DISCLOSURE OF THE INVENTION The above conventional pipe forming apparatus 1
Is a winding drum that conveys the material 3 by rotationally driving the molding rollers in the roll stands 9 and 14 and the side roll stand 10 by motor power, and rotates the pipe material 3a sent from the molding machine 4 in a vertical plane. It is a structure wound up to 5. Therefore, the material 3 is driven in and out by the front and rear forming rolls in each forming section, and is formed by the roll stand 19 or the side roll stand 10 at each stage with a strict roll clearance according to the forming shape. For this reason, when one molding roll slips with respect to the material 3 due to variations in the plate thickness of the belt-shaped material 3 itself, the material 3 rolls in the molding section, and the material surface However, there is a problem that the molding roll may be damaged.

Further, since the roll stands 9 and 14 are configured to actively perform the required roll forming, the force for pushing and pulling the material 3 between the roll stands 9 and 14 is likely to be different, and the forming section is formed. If there is a difference in transfer force or speed difference between loading and unloading inside, rolling or buckling is more likely to occur unnecessarily as the softer material 3, and the web generated by the edge due to such rolling or buckling causes welding failure. It was. Furthermore, in order to prevent the rolling and buckling from occurring between the molding machine 4 and the winding drum 5, strictly speaking, a winding speed proportional to the winding diameter of the winding drum 5 is required. Needs to be adjusted in accordance with the conveying speed in the molding machine 4, and if such adjustment capability is abandoned, the difference between the minimum winding diameter and the maximum winding diameter of the winding drum 5 cannot be increased without fail, so There is a problem that the amount of the pipe material 3a that can be wound around the winding drum 5 of one roll is limited.

Therefore, the object of the present invention is to carry out the material in the molding machine by the winding force of the winding machine, thereby eliminating the unreasonable molding and highly accurate manufacturing regardless of the variation in the plate thickness of the band-shaped material. It is an object of the present invention to provide a tension type pipe forming apparatus that enables pipes.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to an uncoiler for delivering a wound strip-shaped material, and a strip-shaped material delivered by the uncoiler for forming a tubular material by forming a tubular shape and welding a seam in the conveying process. And a winding machine that winds up the pipe material carried out from the molding machine in a substantially horizontal plane, and that substantially takes the material conveying force in the molding machine with the winding force. The above object is achieved by providing a tension type pipe forming apparatus.

Further, the winding machine is clamped between the tube material carried out from the molding machine and the pressing roller and is driven to rotate substantially in a horizontal plane, and the tube material is wound and pulled within a range of less than one turn. A tension drum, and a winding bobbin which is arranged substantially adjacent to the tension drum and which is wound around the tension drum and has a winding tendency and is wound around by the winding tendency and its own weight after being separated from the tension drum. By providing and configuring, the above-mentioned object is achieved.

[0009] Furthermore, the forming machine is provided with a plurality of stages of roll stands for roll-forming a band-shaped material into stages, and a joint portion of the roll-shaped material is preheated to perform tungsten / inert gas welding. The above-described object is achieved by providing and configuring welding means.

[0010]

According to the above construction, the band-shaped material sent out by the uncoiler is formed into a tubular shape by the molding machine during the conveying process and the seams are welded to form a pipe material, and the pipe material delivered from the molding machine is taken up by the winding machine. Takes up substantially in the horizontal plane, and the take-up force substantially bears the material conveying force in the molding machine, which enables highly accurate pipe making regardless of the variation in the plate thickness of the band-shaped material.

[0011]

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 are a side view and a plan view, respectively, showing an embodiment of the pulling pipe forming apparatus of the present invention. The pipe forming apparatus 21 shown in FIGS. 1 and 2 is a horizontal winding tension type, and conveys the band-shaped material 3 wound around the uncoiler 2 rotating in the vertical plane while forming and welding it in a tubular shape by the forming machine 22. Finally, it is configured so that it is wound up on a horizontal winding type winding machine 23 which integrally bears the material conveying force.

The uncoiler 2 pulls the wound strip-shaped material 3 to the winding machine 23 and sends it out. The molding machine 22
Similar to the conventional molding machine 4, the band-shaped material 3 sent out by the uncoiler 2 is formed into a tubular shape in the conveying process, and the joints are welded to form the tubular material 3a. Winder 23
The tube material 3a molded by the molding machine 22 is rolled up in a substantially horizontal plane, and the winding force thereof substantially bears the material conveying force in the molding machine 22. Therefore, the molding machine 2
No. 2 drives the forming roll of each stand until the tip of the material 3 reaches the winding machine 23, but after the tip of the material 3 reaches the winding machine 23, the transmission of the motor power to the forming roll is stopped. Then, leave the molding roll in a free rotation state. Therefore, the motor 24, which is the rotational power source of the forming roll, operates only temporarily in the initial stage until the tip of the material 3 is connected to the winder 23.

After the end of the material 3 is tied to the winding machine 23 and the driving of the motor 24 is stopped, the molding machine 22 guides the material 3 fed from the uncoiler 2 to the inlet guide roller 7 on the main body bed 6 and continues. Through the hoop guide 8, it is sequentially conveyed to the 5-stage roll stand 9 and the 4-stage side roll stand 10. The material 3 that has passed through the seam guide stand 11 and reached the squeeze stand 12 is preheated at the welding location and then welded at the seam portion by the welding torch 13. In the embodiment, a method of welding the seam portion that has been preheated by high-frequency heating using the tungsten-inert gas welding method is used.
It prevents rapid heating and quenching, and enables high-quality welding. The pipe material 3 a having the welded seam passes through the roll stand 14 for ironing, leaves the main body bed 6 and is wound up by the winding machine 23.

The take-up machine 23 has a tension drum 26, which is driven by the belt 25 to transmit the rotational power of the motor 25 and is driven to rotate, and a take-up device arranged adjacent to the tension drum 26 on the right side in the pipe material conveying direction. Bobbin 27
Have. The tension drum 26 sandwiches the pipe material 3a carried out from the molding machine 22 with the pressing roller 28,
It is driven to rotate in the horizontal plane. In the embodiment, since the pipe material 3a is wound around the tension drum 26 by about 3/4 circumference and pulled, the pressing rollers 28 are arranged at four positions by shifting by 90 degrees in the circumferential direction. The winding bobbin 27 is
A core 27a, which is arranged adjacent to the tension drum 26 and has a diameter slightly smaller than that of the tension drum 26, is installed upright in the center of the lower end flange 27b in order to naturally wind the pipe material 3a that has left the tension drum 26. There is.

Roll stand 14 for ironing
The pipe material 3 a that has left the first path is first guided to the side surface of the tension drum 26 via the guide roller 29 at the entrance of the winder 23. Here, the pipe material 3 a is pressed against the circumferential surface of the tension drum 26 by the first pressing roller 28, and starts to wind around the tension drum 26. The pipe material 3a wound around the circumferential surface of the tension drum 26 is further 3/4 rounds along the circumferential surface of the tension drum 26 by the pressing rollers 28 which are arranged at three positions spaced 90 degrees apart. It is closely wound. Then, the pipe material 3a separated from the last pressing roller 28
Separates the tension drum 26 in the tangential direction. The pipe material 3a that has detached from the tension drum 26 is guided obliquely downward due to the winding habit and its own weight attached during the 3/4 round of the tension drum 26, and naturally winds around the core 27a of the winding bobbin 27 as it is. Winding bobbin 2
Since the core 27a of No. 7 has a smaller diameter than the tension drum 26, the pipe material 3a is comfortably wound around the winding bobbin 27 while flexibly responding within the elastic range of the winding tendency.

As described above, the tension type pipe forming apparatus 21
The forming machine 22 forms the tubular material 3 sent out by the uncoiler 2 into a tubular shape in the conveying process and welds the seam to form the pipe material 3a, and the pipe material 3a delivered from the forming machine 22 is taken up by the winding machine. Since 23 is wound in a horizontal plane and the winding force is substantially responsible for the material-conveying force in the molding machine 22, the plate-shaped material 3 conveyed in the molding machine 22 is conveyed by each molding step. The winding force of the winding machine 23 is not used by the forming rolls of FIG. Therefore, the roll stands 9, 10, 14
The forming roll provided for each is only passively rotated by the conveying force on the side of the material 3, and by allowing the roll clearance of the forming roll to have some allowance, the strip-shaped material 3 with uneven plate thickness Also,
The band-shaped material 3 can be roll-formed with peace of mind without damaging it. In addition, since there is no difference in the force for pushing and pulling the material 3 between the roll stands 9 and 10, the soft material 3 used for, for example, ultra-precision copper pipes for light electric power and ultra-precision copper pipes
Even if is molded, rolling or buckling does not occur during the transportation process. Therefore, the web generated at the edge portion due to rolling or buckling does not cause welding defects, and the pipe material 3a having a required size can be accurately formed.

Furthermore, the winding machine 23 is the molding machine 2
The tension drum 26 that holds the pipe material 3a discharged from the No. 2 between the pressing roller 28 and the pipe material 3a and is driven to rotate in a substantially horizontal plane, and winds and pulls the pipe material in a range less than one turn.
And a winding bobbin 27 that is disposed almost adjacent to the tension drum 26 and that is wound around the tension drum 26 and has a winding habit and that is wound around by the winding habit and its own weight after being separated from the tension drum 26. Since the tension drum 26 has the same diameter, the tension drum 26 always has the same diameter.
Therefore, the winding speed of the tension drum 26 does not fluctuate as long as it rotates at the same angular velocity, and the conveying speed of the molding machine 22 is centrally determined by the winding speed of the winder 23. Therefore, molding machine 2
No rolling, buckling, or anything similar to this occurs between the two and the winder 23, so no special speed adjusting means is required. Further, since the pipe material 3a having a winding tendency when it is pulled by the tension drum 26 naturally winds around the winding bobbin 27 due to the winding tendency and its own weight, the winding diameter of the winding bobbin 27 should be taken into consideration. It is possible to wind a sufficient amount of the pipe material 3a from the minimum winding diameter to the maximum winding diameter, and it is possible to dramatically improve the amount of the pipe material 3a that can be collected on the one winding bobbin 27.

Further, the forming machine 22 is provided with a multi-stage roll stand for roll-forming the strip-shaped material 3 into a tubular form at each stage,
Since the joint part of the material 3 that is roll-formed into a tubular shape is preheated and tungsten / inert gas welding is performed,
The band-shaped material 3 to the final shape of the pipe material 3a can be gradually molded in several stages, and by distributing the molding load for each stage, the deformation of the material and the edge portion due to unreasonable molding It is possible to eliminate the web formation, etc., and to preheat the welded part and then perform tungsten / inert gas welding, which prevents uneven deformation of the welded part and the periphery due to rapid heating and quenching, and ensures high quality welding. The seams can be welded.

In the above embodiment, the number of molding stages of the molding machine 22 is not limited to four or five, but may be another number. Further, the winding angle of the pipe material 3a with respect to the tension drum 26 of the winding machine 23 may be an angle other than 270 degrees.

[0020]

As described above, according to the present invention,
The belt-shaped material sent out by the uncoiler is molded into a tubular shape by the molding machine during the transportation process and the joints are welded to form a pipe material, and the pipe material discharged from the molding machine is wound up in a substantially horizontal plane, Since the winding force is set to substantially bear the material conveying force in the molding machine,
The transportation of the plate-shaped material that is transported in the molding machine is not performed by the molding roll for each molding stage, but is performed by the winding force of the winding machine, and the molding rolls provided for each roll stand are Since it can only be passively rotated by the conveying force, by allowing a little clearance for the roll clearance of the forming roll, roll-shaped rolls can be formed with confidence without damaging the strip-shaped material even if the strip-shaped material has uneven thickness. Since there is no difference in the force of pushing and pulling the material between the roll stands, even if soft materials such as ultra-precision copper tubes for low-power electrical applications and ultra-precision copper tubes are molded, they can be rolled in the conveying process. There is no buckling, so the web generated at the edge due to rolling or buckling does not cause welding defects, and the required dimensions Tubing the effects of the like can be accurately roll molding.

Furthermore, the winding machine holds the pipe material carried out from the molding machine between the pressing roller and is driven to rotate in a substantially horizontal plane, and winds and pulls the pipe material in a range less than one turn. Consists of a tension drum and a winding bobbin which is arranged substantially adjacent to the tension drum and which is wound around the tension drum and has a winding tendency and is wound around by the winding tendency and its own weight after being separated from the tension drum. Since the tension drum can always pull the pipe material with the same diameter, the winding speed of the tension drum does not fluctuate as long as it rotates at the same angular velocity, and the conveying speed of the molding machine is the winding speed of the winding machine. Since the speed is centrally determined by the speed, there is no rolling, buckling, or something similar to this between the molding machine and the winding machine. Special rate adjustment means is not required,
In addition, the pipe material with a winding habit when it is pulled by the tension drum naturally winds around the winding bobbin due to the winding habit and its own weight, so the winding diameter of the winding bobbin does not have to be a concern. To a maximum winding diameter, it is possible to wind a sufficient amount of the pipe material, and thereby it is possible to dramatically improve the amount of the pipe material that can be collected on one winding bobbin.

In addition, the molding machine comprises a plurality of stages of roll stands for roll-forming the band-shaped material into tubular stages, and a welding means for preheating the joint portion of the tubular roll-formed material to perform tungsten / inert gas welding. Since it is configured with and, it is possible to gradually mold from the band-shaped material to the pipe material that is the final shape in several stages, and by distributing the molding load at each stage, it is possible to make molding unreasonably. It is possible to eliminate the accompanying deformation of the material and the formation of webs at the edges, and because the welding means preheats the welded portion and then tungsten-inert gas welding, the welded portion and the periphery are deformed unevenly by rapid heating and quenching. And the effect that the seam portion can be welded with high quality welding.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a tension type pipe forming apparatus of the present invention.

FIG. 2 is a plan view of the tension type pipe forming apparatus shown in FIG.

FIG. 3 is a side view showing an example of a conventional tensile type pipe forming apparatus.

FIG. 4 is a front view showing a molding shape in each roll molding stage of the tension type pipe forming apparatus shown in FIG.

[Explanation of symbols]

 2 Uncoiler 3 Band material 3a Pipe material 9,14 Roll stand 10 Side roll stand 21 Tension type pipe forming device 22 Forming machine 23 Winding machine 26 Tension drum 27 Winding bobbin

Claims (3)

[Claims] 1. An uncoiler for feeding a wound strip-shaped material, a molding machine for shaping the strip-shaped material fed by the uncoiler into a tubular shape in the conveying process and welding a joint to form a tubular material, and the molding machine. And a winding machine that substantially winds the material conveying force in the molding machine by the winding force of the pipe material carried out from the inside in a substantially horizontal plane. 2. The tension-type pipe forming apparatus according to claim 1, wherein the winding machine holds the pipe material carried out from the molding machine between the pressing roller and is driven to rotate substantially in a horizontal plane, After the tension drum that winds the pipe material in a range less than one turn and pulls it, and the pipe material that is disposed almost adjacent to the tension drum and that has a winding habit around the tension drum is released from the tension drum. A tension type pipe forming apparatus comprising: a winding bobbin that is wound by a winding tendency and its own weight. 3. The tensile type pipe forming apparatus according to claim 1, wherein the molding machine comprises a plurality of stages of roll stands for roll-forming a band-shaped material into tubular forms at each stage, and a tubular roll-forming of the material. Preheat the seam to make tungsten
A tension-type pipe forming apparatus, comprising: a welding means for performing inert gas welding.