JPS5820320A - Pipe drawing device - Google Patents

Abstract

PURPOSE:To enable observation and primary inspection by a worker and to remove defective pipes quickly by pushing up a pipe after drawing upward and enabling to shift it. CONSTITUTION:A blank pipe is drawn from a forming hole 15 of a die 13 with a vice 14 with a mandrel rod inserted in it. When the tip of drawn and formed pipe 22 is released from holding by a chuck of the vice, it falls by its own weight onto a placing plate 17 and held horizontally. The placing plate 17 is moved upward with the pipe 22 placed on it and stopped when it reaches the upper part of the die 13. The pipe 22 is then transferred to a carrying body 25 provided on other side by a thrusting plate 24 that is reciprocated by a cylinder 23 on the upper side of a stand 16. Since the pipe 22 after drawing is placed in high position, it can be watched and inspected for condition of drawing by a worker at all times.

Description

[Detailed description of the invention] The present invention relates to a tube stretching device.

The elongated tube is made by inserting a core rod 2 into the tube 1 and forming a tapered hole 4 in the die 3, as shown in FIG.
By forcibly pulling it out from the core bar 2a and determining the relative positional relationship between the core bar 2a and the shaping hole 4, a completed tube having a predetermined wall thickness, inner and outer diameters, and smooth inner and outer surfaces is formed. As shown in FIGS. 1 to 3, the conventional pipe drawing device has a pedestal 5 for the raw pipe 1 installed above the die 6, and below the pedestal 5 two endless chains 6 are used to hold the raw pipe 1. A cuff that can be moved reciprocally is provided between the chains 6, a guide table 8 that can be moved up and down by a cylinder is installed between the chains 6, and an endless belt 9 that can be moved laterally is provided below the chain 6.

When elongating the pipe, the core bar 2 is raised in an inclined manner and the core bar 2a is
is inserted into the rear end of the raw pipe 1, and then the raw silicon pipe 1 is pushed along the core metal rod 2 by a pushing body (not shown), so that the entire core metal rod 2 is inserted into the raw pipe 1, and in this state, the core metal rod As the tube 2 descends and moves forward, the tip of the blank tube 1, which is tapered in advance, protrudes from the shaping hole 4 of the die 6 to the opposite side. This protruding tip is held by a ten thousand cuff chuck and the shaping hole 4
The finished pipe that has been elongated as described above is obtained by pulling out the raw pipe 1 from the tube.The completed pipe is placed on the guide stand 8, and further transferred from the guide stand 8 to the belt 9, and the elongated pipe is rotated. The materials are transported to a collection site by a transport body 10 provided on the side of the moving belt 9, and subjected to two-sided processing.

In the above-mentioned pipe stretching device, all the pipes after the pipe stretching are transferred downward, and the raw pipe 1 as described above is transported downward.
Since the insertion of the core rod 2 into the rear end is done manually by the worker, the worker stands on the workbench at the same height as the die 6 and inspects the pipe after it has been drawn and transferred to the lower part. It was impossible to do so.

In addition, since lubricating oil is attached to the inner and outer surfaces of the raw tube 1 to improve the drilling, this lubricating oil becomes droplets and falls onto the lower base of the equipment during the tube drawing process, giving off a strange odor and It was unsanitary.

The above-mentioned drawbacks of conventional tube drawing devices are particularly noticeable in large-scale devices with multiple tubes, such as three or five tubes.
It is common not only in Japan but also in other countries to transport the pipe after elongation from the lower part.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional pipe drawing apparatus, an object of the present invention is to provide a pipe drawing apparatus that allows the pipe after drawing to be transferred above a die and visually inspected by an operator.

Another object of the present invention is to provide a pipe drawing device that is capable of collecting and removing lubricating oil that falls as droplets during pipe drawing work.

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

Figures 4 and 5 show an apparatus for three pieces, in which a cored rod 12 is inserted into a blank tube 11, and the die 13 is shaped using a vise 14 that can be reciprocated relative to the die 13. Hole 1
The process of drawing out the raw pipe 11 from the frame 1 and forming a pipe having the necessary wall thickness and inner and outer diameters according to the relative positional relationship between the core bar 12a and the shaping hole 15 is the same as in the conventional method.
The mounting plate 17, which is normally located below the die 16 installed and fixed between the die 13 and the die 13, can be moved up and down to a position above the die 13 by, for example, a cylinder 18. Vertical movement - When the vise 14 is moved back and forth, it passes between a pair of endless chains 19.

The mounting plate 17 may be a long plate having a length equal to or longer than the tube after elongation, and the entire plate may be moved up and down.
Alternatively, as shown in the figure, a plurality of mounting plates 17 may be arranged at appropriate intervals in the tube elongation direction, and each mounting plate 17 may be movable up and down.

Further, the present invention is characterized in that the lower part of the mounting plate 17, that is, the lower part between the frames 16 is entirely covered with the covering plate 20.

This cover plate 20 may be installed horizontally, and discharge holes may be bored in several places, and a discharge pipe communicating with the outside of the apparatus may be connected to the discharge holes. The entire structure may be installed in an inclined manner, and the discharge groove 21 may be connected to the lower part of the inclination.

The present invention has the above-mentioned configuration, and with the core rod 12 inserted, the raw tube 11 is held in the shaping hole 15 of the die 13 using a vise 14''.
When the tip of the tube is released from the chuck of the vise 14, it falls onto the mounting plate 17 by its own weight and is supported horizontally. The mounting plate 17 with the tube 22 mounted thereon is raised and stopped when the die 13 is at the upper position as shown by the chain line, and a pushing plate 2jK, which can be reciprocated by means of a cylinder 23, for example, is placed on the side of the upper part of the pedestal 16. A large number of rows 2 with a cross pipe 22 installed on the other side
It is only necessary to transfer the pipe onto the transfer body 25 consisting of the pipe 2 after elongation.
2 is located at the top so it is always visible to the operator.
The expanded state of the tube 22 can be inspected. In particular, tube 2
No. 2 is a type in which the elongated state of the pipe can be determined by checking the final end, and if there is a defective part at the final end, the entire pipe can be removed by the operator as a defective product.

After the inspection, the pipe 22 is transferred by the transfer body 25 to a collection site, a secondary treatment site, etc.

After the pipe 22 has been transferred to the transfer body 25, the mounting plate 17 is lowered to a fixed position, and the vise 14 is returned to the position where the raw pipe 11 can be pulled out by the chain 19 (1), and the next pipe stretching operation is performed. .

Regarding the replenishment of prizes and raw pipes 11, a mounting stand 2 is placed above the company stand 16.
6, place the raw tubes 11 (three in this example) according to the number of core metal rods 12 on the mounting table 26, and set them on the core metal rods 12 in the same manner as in the conventional method. .

“According to the above-mentioned invention, the pipe 22 after elongation is pushed upward and can be transferred, which allows the worker to visually check and carry out subsequent inspections, and to quickly remove defective pipes. be able to.

Furthermore, since the entire lower part of the pedestal 16 is covered with the covering plate 20, the used lubricating oil that falls in the form of droplets during the pipe drawing operation can be discharged to the outside from the covering plate 20. There is no accumulation and the area around the device can be kept clean.

Further, if a plurality of mounting plates 17 are provided and each of them is independently movable up and down, only the mounting plates 17 within an interval corresponding to the length of the tube can be moved up and down.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a conventional pipe drawing device with a part thereof in cross section, Fig. 2 is a front view of the same, Fig. 3 is a plan view of the same, and Fig. 4 is a cross section of a part of the pipe drawing device of the present invention. FIG. 5 is a front view of the same. 11 is a raw pipe, 12 is a core bar, 13 is a die, 14 is a vise, 15 is a shaping hole, 16 is a frame, 17 is a mounting plate, 20 is a covering plate, and 22 is a pipe after elongation. Patent applicant: Toshida Kogyo Co., Ltd.

Claims (2)

[Claims] (1) Depending on the relative position of the core bar 12m inserted into the raw pipe 11 and the shaping hole 15 of the die 13, the raw pipe 11 pulled out from the shaping hole 15 is expanded to the required wall thickness and inner and outer diameter. In the device for carrying out the tube elongation, the tube 22 after tube expansion is transferred to the upper part of the device, and the tube 22 is
2. A pipe stretching device that is characterized in that it enables inspection. (2) Core metal 12m and die 16 inserted into the raw pipe '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 diameters, the lubricating oil droplets that fall during the tube expansion process are discharged to the outside of the device. A pipe drawing device characterized in that it is possible to