JPH0565420U - Portable metal pipe forming tool - Google Patents

Abstract

(57) [Summary] [Purpose] To be compact and lightweight, portable, and capable of easily forming a brim on a metal pipe at the site of plumbing using hydraulic pressure. [Structure] A piston 4, which is operated by a hydraulic device 1 by operating a handle 2, is equipped with a cylindrical punch 5 having a step corresponding to a brim formed in a metal pipe 10 on an inner peripheral surface thereof. 5, one end side is detachably connected to the hydraulic device 1 and the other end side has a bottomed gauge fitting hole 8
The gauge support 7 provided with the above is mounted, and the spring 9 for pulling back the cylindrical punch 5 is interposed between the cylindrical punch 5 and the gauge support 7, and the bottomed gauge fitting hole 8 is provided.
A fixing screw 1 for fixing the gauge 12 to the gauge supporting body 7 is fitted with a gauge 12 which is divided into two parts for holding the metal pipe 10 and has a semicircular gauge hole 13 on the opposite surface.
A portable metal pipe forming tool characterized in that 7 is screwed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is a portable metal pipe forming tool intended to form a brim at the end of a metal pipe for piping in a pipe construction site without a pipe forming processing facility. Anyone can easily use it at the plumbing site.

[0002]

[Prior Art]

 Conventionally, as a method of forming a brim that is folded back in the outer peripheral direction at the end of a metal pipe, a press molding machine or lathe installed in the factory has been used, and a molding hole whose inner peripheral surface corresponds to the brim is used. Using the pipe molding die (punch) that he had, the pressure was applied in the axial direction while rotating the positioned metal pipe, and the end was deformed by pushing the end into the forming hole to form the brim. ..

Alternatively, the brim has been molded by pushing the end of the metal pipe into the molding hole of the molding die with a strong pressure to deform the end of the metal pipe.

[0004]

[Problems to be solved by the device]

 Since the conventional brim forming means in metal pipe processing uses a press machine or lathe installed in the factory, at the work site of piping work, a brim for connecting to the end of the metal pipe is formed if necessary. I couldn't do that.

[0005]

[Means for Solving the Problems]

 The present invention solves the problem by providing a small and lightweight hydraulic device that operates a piston with hydraulic pressure by operating a handle, in which the piston has a brim on one end side and a metal on the inner peripheral surface on the other end side. A cylindrical punch with a step corresponding to the brim formed on the pipe is attached, and one end is detachably connected to the hydraulic device 1 on the outside of the piston and the cylindrical punch, and the bottom end has a gauge fitting hole. The gauge support provided with is attached, and a spring for pulling back the cylindrical punch is interposed between the cylindrical punch and the gauge support, and the metal pipe is attached to the bottomed gauge fitting hole in two parts. A gauge having a semicircular gauge hole is fitted on the opposite surface, and a fixing screw for fixing and fixing the positions of the gauge and the metal pipe is screwed to the gauge support body. With metal pipe forming tools That.

[0006]

[Action]

 A two-divided gauge in which a predetermined position of the end of the metal pipe was held in a semi-circular gauge hole was integrated, inserted into the bottomed gauge fitting hole of the gauge support, and then screwed into the gauge support. Tighten the fixing screw to fix the gauge. At this time, the position of the gauge is accurately set by the insertion end abutting the bottom surface of the bottomed gage fitting hole and the tip of the fixing screw fitting into the centering V hole on the side surface of the gauge.

Next, when the grip handle is reciprocated, the cylindrical punch mounted on the tip side of the piston moves forward against the elastic force of the spring due to the operation of the hydraulic device, and the metal pipe fixed as shown in FIG. The exposed end part of is pressed into the inside of the cylindrical punch by hydraulic pressure.

The end of the press-fitted metal pipe is pressed into a small-diameter step formed on the inner peripheral surface of the cylindrical punch while being pressed into a small diameter, and the tip abuts. When the cylindrical punch further advances from this position, the metal pipe portion located in the large diameter step formed at the open end of the inner peripheral surface of the cylindrical punch is deformed by the pressing force and spreads outward, and at the same time. The enlarged diameter portion is bent by a large diameter step by pressing force to form a brim as shown in FIG. After completion of the brim molding, the cylindrical punch, which has stopped advancing, is pulled back by the restoring force of the spring and retreats.

[0009]

【Example】

 FIG. 1 shows an embodiment of the present invention, in which a small and light hydraulic device 1 is provided with a grip handle 2 and the piston main shaft 3 of the hydraulic device 1 is operated by operating the grip handle 2. A piston 4 having a cylindrical punch 5 fitted on the tip side thereof is attached to the tip side of the piston main shaft 3.

As shown in FIG. 4, the cylindrical punch 5 has a flange for supporting one end of the spring 9 on one end side, and the inner peripheral surface on the other end side is the shape of the flange 11 of the metal pipe 10 to be formed. Accordingly, a small diameter step 6a is provided on the back side and a large diameter step 6b is provided on the opening side.

On the outside of the piston 4 and the cylindrical punch 5, a gauge support 7 having one end connected to a hydraulic device and having a bottomed gauge insertion hole 8 opened at the other end in the direction perpendicular to the axis is fitted. To do. In addition, the cylindrical punch 5 is fitted between the gauge support 7 and both ends are supported by the flange of the cylindrical punch 5 and the stepped portion of the inner peripheral surface of the gauge support 7, and the cylindrical punch 5 is formed after the brim molding. 5 and the spring 9 for pulling back the piston 4 are interposed.

As shown in FIGS. 2 and 3, the bottomed gauge fitting hole 8 is fitted with a gauge 12 which is divided into two parts for fixing the metal pipe 10 by sandwiching it and has a semi-circular gauge hole 13 on the opposite surface. To wear. The guide pin 16 is fitted into the pin hole 15 so that the gauge 12 divided into two parts is accurately matched and integrated.

Further, as shown in FIGS. 2 and 3, a fixing screw 17 is inserted whose tip is fitted into a centering V hole 14 provided on the side surface of the gauge 12 to fix the positions of the gauge 12 and the metal pipe 10 and fix them. It is screwed to a part of the gauge support 7.

According to the present invention having such a structure, as shown in FIG. 5, the end portion of the metal pipe fixed by being fixed by the gauge 12 fitted in the bottomed gauge fitting hole 8 is fixed by oil pressure. It is strongly pushed into the cylindrical punch 5 by the pressing force of the piston 4. Therefore, the end of the metal pipe 10 is formed by the small diameter step 6a and the large diameter step 6b provided on the inner peripheral surface of the cylindrical punch 5, and the metal pipe 10 having the brim 11 at the end is exemplified as shown in FIG. Can be formed. After the brim molding is completed, the hydraulic pressure is removed, and the cylindrical punch 5 and the piston 4 are pulled back by the restoring force of the spring 9 and retreat to the original state, so loosen the fixing screw 17 and remove the gauge 12. This allows the metal pipe after brim molding to be easily removed.

[0015]

[Effect of the device]

 INDUSTRIAL APPLICABILITY The present invention enables a worker to carry a brim at the end of a metal pipe by a simple operation of operating a grip handle at a piping construction site. Also, because the gauge and cylindrical punch can be easily attached and detached and replaced, it is possible to replace with a gauge with semi-circular gauge holes of different sizes and a cylindrical punch with different sizes of small diameter steps and large diameter steps on the inner peripheral surface. By doing so, the brim can be molded into metal pipes of various sizes.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is an end view of the AA ′ portion in FIG.

FIG. 3 is a perspective view of an embodiment of a gauge that is an essential part of the present invention.

FIG. 4 is a first embodiment of a cylindrical punch which is an essential part of the present invention.
It is a partial incision front view.

FIG. 5 is a front view showing a partial incision for explaining the operation of the present invention.

FIG. 6 is a partially cutaway front view of a metal pipe with a brim formed according to the present invention.

[Explanation of symbols]

 1 Hydraulic device 2 Grip handle 3 Piston spindle 4 Piston 5 Cylindrical punch 6a Small diameter step 6b Large diameter step 7 Gauge support 8 Bottom gauge fitting hole 9 Spring 10 Metal pipe 11 Flange 12 Gauge 13 Semi-circular gauge hole 14 Centering V hole 15 Pin hole 16 Guide pin 17 Fixing screw

Claims (1)

[Scope of utility model registration request] 1. A piston 4, which is operated by a hydraulic device 1 by operating a handle 2, is equipped with a cylindrical punch 5 having a step corresponding to a brim formed in a metal pipe 10 on an inner peripheral surface thereof. A gauge support 7 having one end removably connected to the hydraulic device 1 and a bottomed gauge fitting hole 8 provided at the other end is attached to the outside of the shaped punch 5, and the cylindrical punch 5 and the gauge support are attached. 7, a spring 9 for pulling back the cylindrical punch 5 is interposed, the gauge is divided into two in order to hold the metal pipe 10 in the bottomed gauge fitting hole 8, and has a semicircular gauge hole 13 on the opposite surface. 12. A portable metal pipe forming tool, wherein 12 is fitted and a fixing screw 17 for fixing the gauge 12 is screwed on the gauge support 7.