JPS63268526A - Roll device for forming pipe class - Google Patents

Abstract

PURPOSE:To improve the forming accuracy of a work by fitting a roller die to a supporting shaft freely rotatably and arranging the supporting shaft for the rotary center shaft of a core metal with its angle variable. CONSTITUTION:A core metal 1 is provided with its projection on the base body 2 composed of a large diameter circular columnar part 2a and small diameter circular columnar part 2b. The end face of the small diameter circular columnar part 2b forms the stopper face at the tip position for a work P and the base body 2 is connected to the output shaft of a speed reducer 3 at the large diameter circular columnar part 2a side. The rail 6 in the direction orthogonal to the axial direction of the core metal 1 is arranged on a frame 35 to provide a slider 7 freely movably. The supporting shaft 12 of a roller die 13 is subjected to angle adjustment via a turntable 9 to incline the roller die 13 at appropriate angle for the core metal 1. The work P processing is executed by approaching the roll die 13 with the action of a cylinder device 8. Due to the positional setting of the work being done via a stopper face S the forming accuracy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a roll device for forming pipes, which performs bulge processing, spool processing, or other roll processing on metal pipes.

[Prior art] This type of conventional device has a core metal (inner mold) coaxially attached to the output shaft of a rotary drive mechanism, and a roller outer mold attached to a rotating shaft parallel to the central axis of the core metal. A mold, a mechanism that reciprocates the rotating shaft in the direction of the core metal while keeping it parallel to the central axis of the core metal, and a pipe-shaped workpiece inserted onto the core metal, which is pressed against the base of the core metal to move the workpiece. The workpiece pressing mechanism that prevents separation is comprised of a mechanism.

[Problems to be Solved by the Invention] Since the conventional roll device for forming pipes has the above-mentioned configuration, it is difficult to roll the pipe-shaped workpiece at the rear end of the core metal during any type of roll processing. It is necessary to press the workpiece in the direction and hold it, and the mechanism is responsible for this action. As a result, unnecessary pressure is applied to the end of the workpiece, which tends to deform the workpiece and makes it difficult to perform highly accurate machining.

[Means for Solving the Problems] The gist of the configuration of the present invention is as follows: A core metal, which is an inner mold for molding, is attached to the output part of a rotational drive mechanism, and a core metal that moves forward and backward from the side of the core metal. In a forming roll device comprising a roller mold whose circumferential side is brought into pressure contact with the circumferential side of the core bar and then separated.

The roller type is rotatably attached to a support shaft, and the angle of the support shaft can be changed so that the side located on the tip side of the core metal approaches the rotation center axis of the core metal. This is a forming roll device.

As the rotational drive mechanism, an electric motor or other actuator can be freely employed.

The magnitude of the output may be determined depending on the pipe-shaped workpiece to be processed, and it is preferable that the zero rotation speed and the like can be easily controlled.

The rotational drive mechanism is placed on a suitable pedestal.

The support shaft is attached to a bracket on the carriage, for example. The reciprocating table has a rail arranged on the pedestal, and is movably arranged on the rail.

The bracket is, for example, erected on the turntable that is rotatably and fixably arranged on the carriage. That is, by rotating the turntable by an appropriate angle as necessary, the angle of the bracket is changed, and thus the angle of the support shaft with respect to the core metal is changed, and the support shaft is aligned with the tip side of the support shaft with respect to the core metal. The distance between the base and the base can be made narrower than the distance between the base and the base.

In addition, the movement of the above-mentioned carriage back and forth from the side with respect to the core metal is as follows:
For example, it may be configured by a hydraulic mechanism or the like. in particular,
The bottom of the double-acting hydraulic cylinder is pin-coupled to a part of the pedestal, and the tip of the rod is connected to the carriage. In this way, the carriage moves forward and backward along the rail in accordance with the expansion and contraction of the double-acting hydraulic cylinder.

A hydraulic pressure generating mechanism is connected to the double-acting hydraulic cylinder to supply pressure oil to its front end and rear end at appropriate intervals.

Note that the advancing/retracting mechanism of the above-mentioned carriage can also be configured by a rack, a pinion, or the like. Not limited to specific configurations.

Further, the core bar is configured to protrude from the end face of the cylindrical base body, and the end face is used as a stopper surface against which the tip of the pipe-like workpiece comes into contact for positioning.

Naturally, the core metal is formed into a peripheral shape suitable for bulge processing, spool processing, or other applicable roll forming. At this time, it is preferable that the diameter of the portion not involved in forming is made slightly smaller than that of the pipe-shaped workpiece.

The roller type has a circumferential side formed in a shape corresponding to the circumferential shape of the core metal.

[Function] Since the present invention is configured as described above, it can be easily used for rolling a pipe-shaped workpiece as follows.

First, we prepare the pipe-shaped workpiece for bulge processing, spool processing, and other roll forming processing that will be performed from now on.
First, a core metal having a circumferential shape corresponding to the applicable roll processing is coaxially connected and fixed to a rotating part of a rotational drive mechanism using a cylindrical base.

Further, a roller mold having a circumferential shape corresponding to the circumferential shape of the core metal is rotatably attached to the support shaft.

Next, the angle of the support shaft is adjusted, and the support shaft is tilted at an appropriate angle with respect to the center axis of the core metal so that the distance between it and the tip side is narrower than the distance between it and the cylindrical base body. The inclination of the support shaft is determined by adjusting the angle of the support shaft with respect to the core metal by rotating the turntable when the turntable is attached to a bracket provided upright. Then, fix the turntable at an appropriate angle. The rotation angle of the turntable, that is, the rotation angle of the support shaft, is the rotation angle of a roller type, which will be explained later.
Roll processing is actually carried out on a trial basis to confirm the dimensions and shape of the product while inspecting it.

After preparing in this manner, the roll device for forming the pipes is operated.

That is, the rotary drive mechanism is rotationally driven to move the carriage back and forth.

Thus, the roller type moves back and forth in the direction of the core metal as the carriage moves back and forth. First, while the roller mold is retracting, the pipe-shaped workpiece is inserted into the core metal manually or automatically.In either case, the roller mold is It is necessary to lightly support the pipe-shaped work to hold it on the core metal until it advances and comes into contact with it.

While the pipe-shaped workpiece is being held on the core metal as described above, the roller mold approaches, and first, the portion of the core metal located on the tip side comes into contact with the pipe-shaped workpiece. Due to such roller-type contact, a slight acting force is applied to the pipe-shaped workpiece that advances toward the cylindrical base side of the core metal, and even if the manual or automatic holding described above is released, the tip of the pipe-shaped workpiece remains circular. It will maintain contact with the end of the columnar base. Subsequently, the roller mold moves forward and comes into pressure contact with the pipe-shaped workpiece, and the driving force for one revolution to perform roll forming is applied from the core metal side, and the roller mold is pressed against the pipe-shaped workpiece that is inserted into the core metal. This is transmitted through the shaft, and while rotating in the opposite direction, roll forming is performed together with the core metal.

After the roll processing is completed, the roller mold retreats, and during this time, the formed pipe body is manually or automatically removed from the core metal, and the next pipe-shaped workpiece is again inserted onto the core metal. After this, the procedure described above is repeated again. By repeating this process, continuous roll forming is performed.

Therefore, as mentioned above, even though there is no means to press the pipe-like workpiece from its rear end toward the cylindrical base, the tip of the pipe-like workpiece remains firmly in contact with the end face of the cylindrical base from the start of roll forming to the completion. They are in contact with each other, allowing accurate roll forming.

In addition, as mentioned above, since the suppression operation is not performed from the rear end, no unnecessary external force is applied to the rear end of the pipe-shaped workpiece, and unnecessary deformation does not occur. Therefore, highly accurate roll forming can be performed. Can be done.

[Example] An embodiment of the present invention will be described below based on the drawings.

First, an example of a configuration for bulge processing will be shown, that is, an example of a configuration for enlarging and forming the end of a pipe, which is a work, into a predetermined shape.

As shown in FIGS. 1 and 2, a core metal 1 is configured to protrude from a base body 2. The base body 2 is composed of a large diameter cylindrical part 2a and a small diameter cylindrical part 2b formed at the end thereof.
The core bar 1 is provided on the end face of the core bar 1 so as to protrude in the axial direction thereof.゛The above-mentioned core metal 1 is
As shown in the figure and FIG.
The connecting end side is formed into a shape corresponding to the corresponding enlarged shape, and the distal end side from this part is formed into a cylindrical shape with a slightly smaller diameter.

The end surface of the small diameter cylindrical portion 2b serves as a stopper surface S that determines the tip position when the pipe p, which is a workpiece, is extrapolated onto the core metal 1.

The base body 2 shown in E is connected to the output shaft of the reducer 3 on its large-diameter cylindrical portion 2a side. The speed reducer 3 is connected to the electric motor 4.

Note that the electric motor 4 and the speed reducer 3 connected thereto are installed on a pedestal 5.

As shown in ti, a rail 6 is disposed on the pedestal 5 in a direction perpendicular to the axial direction of the core metal 1, and a slider 7 is movably disposed on this rail 6. A double-acting cylinder device 8 is connected to the slider 7 for moving the slider back and forth along the rail 6. Specifically, the bottom of the double-acting cylinder device 8 is rotatably pin-coupled to a part of the pedestal 5, and the tip of the rod is rotatably pin-coupled to the slider 7. Further, a hydraulic pressure generating device is connected to the double-acting cylinder device 8 to supply pressure oil to extend and contract the double-acting cylinder device 8 at a predetermined period.

Further, a turntable 9 is rotatably arranged on the slider 7. Screws 10 and 10 are screwed into the slider 7 from its side, and these screws are tightened with screws 1O510.
By tightening, the turntable 9 can be fixed to prevent rotation. A bracket 11 is erected on the turntable 9, a support shaft 12 is arranged on the bracket 11, and a roller, ! ! i
13 so that it can rotate freely.

As shown in FIGS. 1 to 3, the roller type 13 has the following features:
It is formed into a circumferential shape corresponding to the core metal 1.

Since this embodiment is configured as described above, it can be used as follows.

First, the angle of the support shaft 12 is adjusted, and as shown in FIG. Tilt it at an appropriate angle. The angle of this roller mold 13 is adjusted by rotating the turntable 9. The turntable 9 is temporarily fixed at an appropriate rotation angle, the apparatus is moved on a trial basis, and the bulge processing step described later is executed to find the optimum inclination angle and fixed definitively. The turntable 9 is fixed by tightening the screws 1O110.

After the setup is completed in this way, the forming phase roll device for the pipes is driven in earnest.

Then, the roller type 13 is
As the slider 7 moves forward and backward, the movement starts to be repeated.

Therefore, while the roller mold 13 is retracting, a pipe P, which is a workpiece, is manually supplied to the core metal 1 in an extrapolated state.

The core metal 1 is rotated by an electric motor 4, and the pipe p is also rotated at the same time. In the meantime, the roller mold 13 approaches, and in particular, as shown in FIGS. 2 and 3, the large diameter portion 14 of the roller mold 13 is first attached to the tip side of the core metal 1. The step corner 15 on the side where it is located is the base 2
It will make contact before the other side. As a result, an acting force is generated in the pipe p in the direction of the base body 2 of the core metal 1. Thus, at this point, let go of pipe p.

Subsequently, the roller type 13 is attached to the double acting cylinder device 2! i8
The roller mold 13 progresses under the action of the metal core 1, presses against the pipe p, and continues to be in pressure contact for a certain period of time, during which time the roller mold 13 performs bulge forming together with the core metal 1 while rotating in the opposite direction as the core metal 1 rotates.

In this way, the tip of the pipe p reliably comes into contact with the stopper surface S of the end face of the small diameter cylindrical portion 2b from the start to the completion of roll forming, and accurate bulge forming can be performed.

Further, since no mechanical pressing operation is performed from the rear end of the pipe P to the above-mentioned strainer surface S side, unnecessary deformation of the pipe P does not occur, and highly accurate bulge forming can be performed.

After completion of the bulge forming process, the roller die 13 is moved back by the action of the double-acting cylinder device 8, and during this time, the formed pipe p is manually removed from the core metal 1, and the primary pipe p is cored again. Extrapolate to gold 1. After this, the procedure described above is repeated again. By repeating this process, a continuous bulge forming process is performed.

[Effects of the Invention] According to the present invention, the workpiece can be accurately held on the core bar during roll forming, even if pressing the pipe from the rear end toward the protruding end of the core bar does not constitute a means. Ru. Since roll forming can be performed without applying unnecessary external force to the pipe, there is no unnecessary deformation and highly accurate forming can be performed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an explanatory plan view thereof, and FIG. 2 is an enlarged explanatory view showing a state in which a roller mold approaches a pipe inserted on a core metal and starts contacting it. , 3rd
This figure is an enlarged partial view showing a state in which the roller mold and the pipe start contacting each other in FIG. 2. l...Core metal, 2...Base body, 2a...Large diameter cylindrical part,
2b... Small diameter cylindrical part, 3... Reducer, 4... Electric motor, 5... Frame, 6... Rail, 7... Slider, 8... Double acting cylinder device, 9 ．． ...Turntable, lO...Tighten with screw, 11...Bracket, 12...Support shaft, 13...Roller type, 14...
Large diameter portion, 15...step corner, p...pipe, S...
...Stopper surface. Patent applicant Sudo Iron Works Co., Ltd. Patent attorney Yukio Kobata Figure 2

Claims (1)

[Scope of Claims] A core metal, which is an inner mold for molding, is attached to the output part of the rotary drive mechanism, and the peripheral side is pressed against the peripheral side of the core metal by moving forward and backward from the side of the core metal. In a forming roll device consisting of a roller mold that is spaced apart from each other, the roller mold is rotatably attached to a support shaft, and the support shaft is aligned with the center of rotation of the core metal so that the tip of the core metal is A roll device for forming pipes, characterized in that the angle can be changed so that the sides located closer together.