JPH072104Y2 - Metal pipe end processing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The metal pipe end processing machine according to the present invention is used for processing a taper screw on the end of a metal pipe for transferring various fluids. .

(Prior Art) When connecting the end of a metal pipe for transferring various fluids to a joint such as an elbow, when forming a taper screw having an outer diameter that decreases toward the tip at the end of this metal pipe There are many.

The work of forming such a taper screw was previously performed by cutting, but in recent years it has become possible to form such a taper screw by rolling. When making a screw by rolling, since the screw groove is formed by crushing the outer peripheral surface of the end of the metal pipe, the metal material of the screw groove portion becomes dense, and the strength of the screw to be made is Compared to this, it dramatically improves.

FIGS. 3 to 4 show a conventional metal pipe end processing machine which is used when performing such taper screw forming work and the like.

This metal pipe end processing machine is provided with a plastic processing machine 2 on one side of the upper surface of the base 1 (front side in FIG. 3, right side in FIG. 4) for narrowing the end of the metal pipe into a tapered shape. , A rolling machine 3 is provided on the other side of the upper surface, and the tip end of the metal pipe for which a taper screw is to be formed at the end is drawn by the plastic working machine 2 into a tapered shape, and then rolled. The machine 3 forms a male screw on the outer peripheral surface of the drawn portion.

When performing a drawing process for forming the tip of the metal pipe into a tapered shape, the metal pipe to be drawn is formed by the plastic working machine 2
With the through hole 5 of the clamp mechanism 4 constituting the
It is held down by a hydraulic cylinder 6 that constitutes the clamp mechanism 4, and another hydraulic cylinder 7 arranged coaxially with the through hole 5 presses a drawing die having a tapered hole toward the tip of the metal pipe. .

When the drawing die is strongly pressed against the tip, the metal tube is tapered so that its tip follows the inner peripheral surface of the tapered hole provided in the drawing die.

As mentioned above, the metal pipe with the tapered tip is
After being pulled out from the through hole 5 of the clamp mechanism 4, it is inserted into the through hole 8 of the rolling machine 3 provided next to it.

A plurality of rolling dies that are movable in the radial direction by a hydraulic cylinder and a cam mechanism are provided in a drum-shaped casing 9 that constitutes the rolling machine 3. Rotates around the metal tube while being strongly pressed against the outer peripheral surface of the end portion of the metal tube by the hydraulic cylinder, and forms a male screw by rolling on the outer peripheral surface of the end portion of the metal tube. During this rolling process, a coolant (cooling oil) is poured on the outer peripheral surface of the end of the metal tube to suppress the temperature rise due to the process.

Inside the base 1, a tank 1 for storing hydraulic oil for the hydraulic cylinders 6 and 7 in addition to the coolant
0, 11 are provided, and hydraulic pumps 12, 1 attached to each tank 10, 11
The oil provided in the tanks 10 and 11 can be sent out to a predetermined portion by the hydraulic pressure switching valve 14 provided inside the base 3 and the hydraulic pressure changeover valve 14. Reference numeral 15 is a motor also provided inside the base 1, which rotates a rotary shaft communicating with the rolling die through a belt to rotate each rolling die around the metal tube.

(Problems to be solved by the invention) However, the conventional metal pipe end processing machine configured and used as described above is only a large stationary type machine, and it is not always possible to effectively utilize the machine.

For example, in building sites of buildings, male threads are often formed at the ends of metal pipes for piping, but in the case of conventional processing machines, it is a small-scale building site that does not have a crane, etc. If is narrow, large and heavy (for example, about 800 kg)
It was difficult to carry in the processing machine, and it was difficult to perform male screw forming work on site.

For this reason, the present inventor combined the constituent parts of the metal pipe end processing machine so that they can be disassembled and assembled, and disassembles the constituent parts at the time of carry-in, so that a crane can be installed on a small scale. We thought about making it possible to install a metal pipe end processing machine even in a small field.

In the case of disassembling and disassembling the constituent parts, the constituent parts are connected to the base 1 by bolts (studs) and nuts, and a part of the hydraulic circuit is constituted by a pressure hose. And the end of the hydraulic passage provided in each of the above-mentioned components are detachable by a one-touch type connection plug.

In this way, by disassembling and assembling each component of the metal pipe end processing machine, the processing machine can be disassembled,
Although it can be used by manually loading it into a construction site and assembling it at the site, simply disassembling and assembling the processing machine having the structure shown in FIGS.
Even after dismantling, the base 1 with the tanks 10 and 11 incorporated
It is difficult to carry by hand because the weight of the

The metal pipe end processing machine of the present invention eliminates the above-mentioned inconvenience.

(Means for Solving the Problem) The metal pipe end processing machine of the present invention, like the conventional metal pipe end processing machine described above, includes a clamp mechanism for holding down the metal pipe to be processed, To press the rolling die on the outer peripheral surface of the tip of the metal pipe by the second hydraulic cylinder to the plastic working machine that has the first hydraulic cylinder that presses the machining die onto the tip of the metal tube fixed by the clamp mechanism. Then, it is configured by combining a rolling machine for plastically working the outer peripheral surface of the tip portion.

However, in the metal pipe end processing machine of the present bill, the above plastic processing machine and rolling processing machine, and an oil supply mechanism for supplying oil to each processing machine are provided on the upper surface of the hollow base. In addition to
The inside of this hollow base is partitioned into a plurality of chambers, and in each chamber, hydraulic oil for operating the first and second hydraulic cylinders,
Alternatively, it is characterized in that the coolant poured on the outer peripheral surface of the tip of the metal pipe is stored during the rolling process.

(Function) The metal pipe end processing machine of the present invention configured as described above may be used to draw the tip of the metal pipe, or a male screw may be formed on the outer peripheral surface of the metal pipe by rolling. The operation itself when doing is the same as that of the conventional metal pipe end processing machine described above.

However, in the case of the metal pipe end processing machine of the present invention, a plastic processing machine and a rolling processing machine and an oil supply mechanism for supplying oil to each processing machine are provided on the upper surface of the hollow base. Since it is possible to disassemble each component into small parts, it is easy to disassemble and transport the parts manually.

Further, the inside of the hollow base is partitioned into a plurality of chambers, and in each chamber, hydraulic oil for operating the first and second hydraulic cylinders,
Alternatively, since the coolant is stored, the size and weight of the entire device can be reduced as compared with the case where a tank for storing the hydraulic oil and the coolant is provided separately.

(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment.

1 and 2 show an embodiment of a metal pipe end processing machine according to the present invention. FIG. 1 is a side view and FIG. 2 is a view seen from the left side of FIG.

This metal pipe end processing machine has casters 16 provided on the lower surface,
On the upper surface of the base 17 which can be moved freely by 16 is a kind of plastic working machine, a drawing machine 18 for tapering the end of the metal pipe and the end of the tapered metal pipe. The outer peripheral surface is provided with a rolling machine 19 for forming a male screw.

The drawing machine 18 has a sufficient rigidity and is configured by connecting two support plates 25a and 25b arranged in parallel to each other by connecting rods 24 and 24. A clamp mechanism 20 for holding down a metal pipe to be machined is fixed to the inner surface of one of the support plates 25a, and a machining die having a tapered hole is provided at the tip of the metal pipe fixed by the clamp mechanism 20 (not shown). The first hydraulic cylinder 21 that presses the () is fixed to the outer surface of the other support plate 25b.

Then, the clamp mechanism 20 includes the other support plate 25b.
Hydraulic clamp cylinder 22 fixed to the inner surface of
With the supply of pressure oil to the clamp cylinder 22, the first
The rod 23 is pushed to the left in the figure, and the clamp die is built in the clamp case 32, and includes a clamp die which is pushed to the upper surface of the metal pipe through a taper cam when the rod 23 moves to the left. Further, the processing die having the tapered hole, by the pressure oil supply to the first hydraulic cylinder 21,
It is adapted to be pressed against the end of the metal tube fixed by the clamp mechanism 20 via the pressing rod 26.

In addition, the rolling machine 19 includes a plurality of rolling dies (three in the normal case) which are each radially displaceable by a second hydraulic cylinder and a cam mechanism provided inside the drum-shaped casing 27. (Not shown) and a nozzle for pouring the coolant on the outer peripheral surface of the tip of the metal tube inserted into the center of the casing 27, and a male screw is formed at the end of the metal tube. In this case, while pouring a coolant to the outer peripheral surface of the end portion of the metal pipe, the outer peripheral surface of the tip portion is plastically deformed by pressing the rolling die onto the outer peripheral surface, and a male screw is formed in this portion. .

The drawing machine 18 and the rolling processing machine 19 as described above are provided on the upper surface of the base 17 provided on the upper surface thereof, in addition to the both processing machines 18 and 19,
An oil supply mechanism for supplying oil to each processing machine 18, 19 is provided.

That is, a low-pressure oil pump 28 for supplying the coolant to the nozzle for the coolant is provided on the upper surface of the intermediate portion of the base 17, and the first hydraulic cylinder 21 and the second hydraulic cylinder 21 and the second hydraulic cylinder 21 are provided on the upper surface of the end portion of the base 17. High-pressure oil pumps 29 for feeding hydraulic oil to the hydraulic cylinder and the clamp cylinder 22 are provided respectively.

As described above, the drawing machine 18, the rolling machine 19, the low-pressure oil pump 28, and the high-pressure oil pump 29 on the upper surface, respectively, the base 17 which is detachably provided, is formed in a rectangular parallelepiped shape and is hollow. The inside of the hollow base 17 is partitioned into a plurality of chambers 30a and 30b.

Then, in the one chamber 30a, the first hydraulic cylinder 21,
The hydraulic oil for operating the second hydraulic cylinder and the clamp cylinder 22 is stored, and the coolant is stored in the other chamber 30b.

In FIGS. 1 and 2, reference numeral 35 is a motor for revolving the rolling die, and 36 is a hydraulic switching valve for switching the supply and discharge of pressure oil to and from each cylinder.

With the metal pipe end processing machine of the present invention configured as described above, a drawing die is pressed against the end of the metal pipe to taper the end of the metal pipe, or The operation itself when forming a male screw by rolling on the outer peripheral surface of the tip portion is the same as that of the conventional metal pipe end processing machine described above.

That is, when performing a drawing process for forming the tip of the metal pipe in a tapered manner, the metal pipe to be drawn is inserted into the through hole 31 of the clamp mechanism 20 constituting the drawing machine 18, and the clamp is formed. By supplying pressure oil to the clamp cylinder 22 that constitutes the mechanism 20 and moving the rod 23 to the left, the clamp die is lowered through the taper cam that is built in the clamp case 32, and the clamp die Hold down the metal tube.

Next, the first hydraulic cylinder 21 arranged coaxially with the through hole 31 presses a drawing die having a tapered hole toward the tip of the metal tube to draw the tip of the metal tube into the drawing. The taper is tapered to a shape along the inner peripheral surface of the taper hole formed in the die.

As mentioned above, the metal pipe with the tapered tip is
After being pulled out from the through hole 31 of the clamp mechanism 20, the through hole 34 provided in the supporting tool 33 attached to the rolling machine 19 provided underneath.
Through, and is inserted into the casing 27 of the rolling machine 19.

In this way, a plurality of rolling dies are pressed by the second hydraulic cylinder and the cam mechanism on the outer peripheral surface of the tip end portion of the metal tube inserted into the casing 27. The motor 35 rotates around the metal tube via a belt, and a male screw is formed by rolling on the outer peripheral surface of the end portion therebetween. At the time of this rolling process, the coolant (cooling oil) sucked from the chamber 30b by the low-pressure oil pump 28 is poured onto the outer peripheral surface of the end of the metal tube, and the temperature rise due to the process is suppressed.

In the case of the metal pipe end processing machine of the present invention configured and operating as described above, the drawing machine 18, which is a plastic working machine, and the rolling machine
19, high-pressure oil pump for supplying pressure oil to each processing machine 18, 19
29, the motor 35 for revolving the drawing die, the low pressure oil pump 28 for supplying coolant, etc. are provided on the upper surface of the hollow base 17, so that it is possible to disassemble each component into a small size. The work of disassembling and carrying by human power becomes easy.

Also, the inside of the hollow base 17 is partitioned into a plurality of chambers 30a, 30b,
The hydraulic oil for operating the first hydraulic cylinder 21, the second hydraulic cylinder, and the clamp cylinder 22 or the coolant is stored in each of the chambers 30a and 30b. Therefore, the hydraulic oil and the coolant are stored. It is possible to reduce the size and weight of the entire device as compared with the case where a separate tank is provided.

(Effect of the Invention) The metal pipe end processing machine of the present invention is configured and operates as described above, so that it is easy to disassemble the processing machine and transport it manually, and the metal pipe end processing is performed. The usable range of the machine can be expanded.

[Brief description of drawings]

1 and 2 show an embodiment of a metal pipe end processing machine of the present invention. FIG. 1 is a side view, FIG. 2 is a view seen from the left side of FIG. 1, and 3 to 4 are shown. The figure shows an embodiment of a conventional metal pipe end processing machine. Fig. 3 is a side view, and Fig. 4 is a view seen from the left side of Fig. 3. 1: base, 2: plastic working machine, 3: rolling machine, 4: clamping device, 5: through hole, 6, 7: hydraulic cylinder, 8: through hole, 9: casing, 10, 11: tank, 12, 13: pressure oil pump, 14: hydraulic switching valve, 15: motor, 16: caster, 17: base, 18: drawing machine, 19: rolling machine, 20: clamp mechanism, 21: first Hydraulic cylinder, 22: Clamp cylinder, 23: Rod, 24: Connecting rod, 25a, 25b: Support plate, 26: Push rod, 27: Casing, 28: Low pressure oil pump, 29: High pressure oil pump, 30a, 30b:
Chamber, 31: through hole, 32: clamp case, 33: support tool, 34: through hole, 35: motor, 36: hydraulic switching valve.

Claims (1)

[Scope of utility model registration request] 1. A plastic working machine comprising: a clamp mechanism for holding down a metal pipe to be worked; and a first hydraulic cylinder for pushing a working die against the tip of the metal pipe fixed by the clamp mechanism. In a metal pipe end processing machine that combines a rolling machine that plastically processes the outer peripheral surface of the tip of this metal tube by pressing the rolling die on the outer peripheral surface of the metal tube with a hydraulic cylinder, The plastic working machine and the rolling processing machine, and an oil supply mechanism for supplying oil to each processing machine are provided on the upper surface of the hollow base, and the inside of the hollow base is partitioned into a plurality of chambers. A metal pipe end characterized by storing hydraulic oil for operating the first and second hydraulic cylinders, or a coolant pouring on the outer peripheral surface of the tip of the metal pipe during rolling in each chamber. Processing machine.