JPH0120008Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a tube drawing device for drawing a raw tube and forming it into a tube having a required wall thickness and inner and outer diameters.

[Conventional technology]

As shown in FIG. 3, the elongated tube is made by forcibly pulling out the tube 1 from the tapered shaped hole 4 of the die 3 with the core rod 2 inserted into the tube 1, and then inserting the core rod 2 into the tube 1. By determining the relative positional relationship with the shaping hole 4, a completed tube having a predetermined wall thickness, inner and outer diameters, and smooth inner and outer surfaces is molded.

Furthermore, a conventional tube drawing device will be explained in detail with reference to FIGS. 3 to 5.

A large number of raw pipes 1 are stacked above the pipe drawing device,
A pedestal 5 is installed in a slightly inclined manner. Two endless chains 6 installed below this pedestal 5 have a vise 7 that can reciprocate with respect to the die 3.
Between both chains 6, a plurality of guide stands 8, which can be moved up and down by cylinders, are installed along the moving direction of the vise 7. Further, below the chain 6 and between each guide table 8, there is provided an endless belt 9 capable of transporting the tube after elongation in a lateral direction orthogonal to the moving direction of the vise 7.

In order to perform the pipe drawing operation in the above configuration, the core bar 2 is raised in an inclined manner, the tip of the core bar 2a is inserted into the rear end of the raw pipe 1, and the raw pipe 1 is moved to the core bar 2 by a pushing body (not shown). By pressing along the core bar 2
The whole will be inserted into the blank tube 1.

In this state, the tip of the raw tube 1, which has been drawn into a tapered shape in advance, is made to protrude from the shaping hole 4 of the die 3 to the opposite side, and the chuck of the vise 7 clamps this protruding tip. Then, by moving the vise 7 in the direction of the arrow in FIG. 3 and forcibly pulling out the raw tube 1 from the shaping hole 4, a completed tube expanded as described above is obtained. The finished pipe is placed on a guide stand 8 by its own weight, the guide stand 8 is lowered, the finished pipe is transferred to a belt 9, and is transported laterally, and is transported to a collection site or a secondary processing site by a transport body 10 consisting of a large number of rollers. is sent.

[Problem that the invention attempts to solve]

In the above-mentioned tube drawing device, the operator stands on the workbench at approximately the same height as the die 3 and inserts the core rod 2 into the tube 1 and into the shaping hole 4 at the tapered end of the tube 1. Insertion, etc., is done manually, but as mentioned above, all the completed tubes are moved to the bottom of the machine after tube drawing, so the operator can check the rear end of the finished tube to determine whether the tube has been drawn well or not. It was not possible to carry out confirmation and inspection work, etc.

In addition, lubricating oil is attached to the inner and outer surfaces of the raw tube 1 in order to make it easier to pull it out from the shaped hole 4.
During the pipe stretching process, this lubricating oil formed droplets and fell onto the base at the bottom of the equipment, emitting a strange odor and being unsanitary.

These problems with conventional pipe drawing equipment are particularly noticeable in large equipment that pulls multiple pipes, such as three or five pipes.Not only in Japan but also in foreign countries, the finished pipe after drawing is drawn from the bottom of the machine. It's supposed to be taken out.

[Means for solving problems]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional pipe drawing apparatus, it is an object of the present invention to provide a pipe drawing apparatus that transports the finished pipe after drawing from a position above the die to another location.

To achieve this objective, the present invention installs a mounting plate, which is normally located below the die, between the endless chains that reciprocate the vise on the drawing side of the raw pipe, and the finished pipe after drawing. This mounting plate allows the die to be transferred above the die and transferred to another location.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show a case where three raw pipes can be expanded at one time.

Insert the core metal rod 12 into the raw tube 11 and press the die 13.
The raw tube 11 is pulled out from the shaping hole 15 of the die 13 using a vise 14 that can be moved back and forth, and a tube having the necessary wall thickness and inner and outer diameters is elongated depending on the relative positional relationship between the core bar 12a and the shaping hole 15. Molding is the same as before.

The present invention is characterized in that the mounting plate 17, which is installed on the drawing side of the raw tube 11 and is normally located below the die 13, can be moved up and down to a position above the die 13 by means of a cylinder 18, for example. There is. The mounting plate 17 passes between a pair of endless chains 19 that reciprocate the vise 14 when moving up and down.

In the drawing, the mounting plate 17 is composed of a plurality of units, and the overall length is the same as or longer than that of the finished pipe after elongation, but the mounting plate 17 as a whole is a single long plate. It may be formed by

When a plurality of mounting plates 17 are formed as shown in the figure, all the mounting plates 17 may be raised and lowered at the same time, or only the mounting plates 17 within a range corresponding to the length of the completed pipe may be interlocked. It may also be moved up and down.

On one side of the upper part of the pedestal 16 on which the die 13 is installed and fixed, there is installed a pushing plate 22 that can be reciprocated laterally by a cylinder 21, that is, horizontally toward the mounting plate 17 side, and on the other side of the pedestal 16, the pushing plate 22 is installed. A transport body 23 consisting of a large number of rollers is provided opposite to.

In the above configuration, the raw pipe 11 is pulled out from the shaping hole 15 of the die 13 with the vise 14, and the vise 1
When released from the clamping by chuck 4, the expanded and formed completed tube 20 falls onto the mounting plate 17 due to its own weight and is supported horizontally. Then, the mounting plate 17 is raised with the completed pipe 20 placed thereon, and the first
As shown by the chain line in the figure, it stops at a position above the die 13 and at the same height as the pushing plate 22.
Next, the pushing plate 22 is moved forward in the horizontal direction to transfer the tubes 20 on the mounting plate 17 onto the transfer body 23, and the tubes 20 are sent to a collection site or a secondary treatment site.

After transferring the tube 20 to the transfer body 23, the pushing plate 22 returns to the predetermined position, the mounting plate 17 descends to a predetermined position below the die 13, and the vise 14 moves the raw tube 1
The pipe returns to the drawing position of No. 1, and the pipe stretching operation continues.

Incidentally, if a mounting table 24 is installed above the pedestal 16 and a large number of raw pipes 11 are placed on this mounting table 24, the raw pipes 11 according to the number of cored rods 12 can be placed in the same way as in the conventional method. It can be set by

In the figure, 25 is a cover plate, below the mounting plate 17,
That is, the entire lower part of the pedestal 16 is covered in an inclined manner, and a discharge groove 26 is connected to the lower part of the inclination of the covering plate 25. Therefore, the lubricating oil that falls during the pipe drawing operation flows through the drain groove 26 along the slope of the covering plate 25.
It can flow inward and be discharged to the outside.

When the cover plate 25 is horizontal, the lubricating oil can be discharged to the outside by forming discharge holes at several locations and connecting each discharge hole to a discharge pipe communicating with the outside of the apparatus.

[Effect of idea]

According to the present invention described above, the finished pipe 20 after elongation
is pushed upwards from the die 13 by the mounting plate 17, so the worker stands while holding the finished pipe 20.
By looking at the rear end, it is possible to visually check and check whether the tube is in good or bad elongated condition on the spot, and defective tubes can be quickly removed.

Furthermore, if the lower part of the device is covered and the lubricating oil can be discharged to the outside, the lubricating oil will not accumulate.

[Brief explanation of the drawing]

Fig. 1 is a front view of the tube drawing device of the present invention, Fig. 2 is a side view of the tube drawing device of the present invention with a portion thereof in cross section, and Fig. 3 is a side view of a conventional tube drawing device with a portion thereof in cross section. , FIG. 4 is a schematic front view of the same, and FIG. 5 is a plan view of the same. 11 is a raw pipe, 12 is a core metal rod, 13 is a die, 1
4 is a vise, 15 is a shaping hole, 16 is a frame, 17 is a mounting plate, 19 is a chain, and 20 is a completed pipe.

Claims (1)

[Scope of utility model registration request] Core metal 12a of core metal rod 12 inserted into raw pipe 11
and the shaped hole 1 of the die 13 installed between the mount 16
5, it is installed on the drawing side of the raw tube 11 in a device that expands and forms the raw tube 11 pulled out from the shaping hole 15 to the required wall thickness and inner and outer diameter, and is normally located below the die 13. The placed mounting plate 17 can be moved up and down above the die 13, and the pushing plate 22 installed on one side of the upper part of the pedestal 16 can be horizontally reciprocated toward the mounting plate 17 side. A pipe stretching device characterized in that a transport body 23 consisting of a large number of rollers is provided.