JPH0775807A - Device for applying lubricating oil on inside surface of tube and method thereof - Google Patents

Abstract

PURPOSE:To obviate to take pressure drop at the time of supplying a lube oil into consideration and miniarurize the device by applying by dropping the lube oil to be applied on the outer peripheral surface of a bar-like member on the inside surface of a tube which is moved to the bar-like member. CONSTITUTION:The bar-like member 11 is inserted into a tube 2 to be drawn and revolved around its axial line. The lube oil is supplied from a lube oil tank 18 to nozzles 17 by driving a pump 20 and the lube oil film A is produced by jetting the lube oil on the outer peripheral surface of the bar-like member 11. Next, the tube 2 is moved along the axial line of the bar-like member 11 by driving a moving mechanism 13. When the front end of the tube 2 reaches under the nozzles 17, the lube oil injected from the nozzles 17 is entered into the tube and the pool part B of the lube oil is produced on the inside surfaces of the inlet of the tube 2. When the tube is further moved, the lube oil film A which is produced on the outer peripheral surface of the bar-like member 11 is dropped on the inside surface by becoming oil drops C by the gravity. In this way, when the tube 2 is moved, the oil film D of lube oil is produced on the inside surface of the tube 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for applying a lubricating oil to the inner surface of a pipe for applying the lubricating oil to the inner surface of the pipe.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a device and a method for applying a lubricating oil to the inner surface of a pipe have a pipe 2 engaged with a die 1, and the pipe 2 is pulled out by a chuck 3 to perform a drawing process. A rod-shaped mandrel 4 is inserted inside the pipe 2 to be pulled out in order to prevent the pipe 2 from buckling.
Lubricating oil is supplied by a pump 8 to a nozzle portion 5 provided at the tip of the mandrel 4 through a lubricating oil passage 6 penetrating the center of the mandrel 4, and the inner surface of the pipe 2 and the mandrel 4
A lubricating oil sump 7 is formed between and.

[0003]

However, in the conventional apparatus and method for applying the lubricating oil to the inner surface of the pipe, the pump 8 supplies the lubricating oil from the nozzle portion 5 to the inner surface of the pipe 2 through the lubricating oil passage 6. Therefore, in order to eject the lubricating oil from the nozzle portion 5, it is necessary to increase the pumping pressure of the pump by the pressure loss due to the lubricating oil passage 6, and there is a problem that the pump 8 becomes large. Even if the diameter of the lubricating oil passage 6 is increased to reduce the pressure loss in order to reduce the size of the pump 8, the discharge flow rate of the pump 8 increases and the size of the pump 8 cannot be reduced.

Also, after pulling out one tube 2, the next tube 2
When the mandrel 4 is set in the pipe 2 to draw out the air, the air enters the lubricating oil passage 6 from the nozzle portion 5 of the mandrel 4, so that the air that has entered before the next pipe 2 is removed is removed. There is also a problem that the pump 8 has to be wastefully operated in order to discharge it to the above.

The present invention has been made in view of the above circumstances. It is possible to downsize a pumping device such as a pump for supplying lubricating oil, and it is not necessary to wastefully operate the pumping device immediately before drawing. An object of the present invention is to provide a device and a method for applying a lubricating oil to the inner surface of a pipe.

[0006]

According to the present invention, there is provided a device for applying lubricating oil to an inner surface of a pipe, wherein a rod-shaped member is inserted into the pipe so as to be relatively movable in an axial direction, and the rod-shaped member is exposed from an end of the pipe. And a moving mechanism for relatively moving the rod-shaped member and the pipe in the axial direction.

The method for applying the lubricating oil to the inner surface of the pipe of the present invention is as follows:
A rod-shaped member is inserted into the pipe so as to be relatively movable in the axial direction, and lubricating oil is applied to the rod-shaped member, and then the rod-shaped member and the pipe are relatively moved in the axial direction, and the lubricating oil applied to the rod-shaped member is It is characterized in that it is applied by dropping onto the inner surface of the tube.

[0008]

According to the apparatus for applying the lubricating oil to the inner surface of the pipe of the present invention, the lubricating oil applied to the outer peripheral surface of the rod-shaped member by the application mechanism is moved relative to the rod-shaped member by the moving mechanism. It is dripped onto and applied to the inner surface. Therefore, it is not necessary to consider the pressure loss when supplying the lubricating oil, the lubricating oil pressure feeding device in the coating mechanism can be downsized, and it is not necessary to separately operate the pressure feeding device immediately before withdrawing, Useless operation of the pressure feeding device can be prevented.

According to the method of applying the lubricating oil to the inner surface of the pipe of the present invention, the lubricating oil applied to the outer peripheral surface of the rod-shaped member is dropped onto the inner surface of the pipe moved with respect to the rod-shaped member and applied to the inner surface. To be done. Therefore, there is no need to consider the pressure loss when supplying the lubricating oil, the lubricating oil pressure feeding device in the coating mechanism can be downsized, and it is not necessary to separately operate the pressure feeding device immediately before withdrawal. Useless operation of the pressure feeding device can be prevented.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a device for applying a lubricating oil to the inner surface of a pipe according to this embodiment has a rod-shaped member (mandrel) 11 fixed to a base 10 and a lubricating oil on the outer peripheral surface of the rod-shaped member 11. And a moving mechanism 13 for moving the rod 2 in the axial direction with the tube 2 inserted in the rod-shaped member 11.
And is roughly configured.

2 to 4 show a more specific structure of the lubricating oil applying apparatus of this embodiment. 2 is a side view of the coating device, FIG. 3 is a front view thereof, and FIG. 4 is a plan view thereof.

The base 10 is fixed to the floor surface 14, and the rod-shaped member 11 is horizontally fixed to the base 10 via a bracket 15 so as to be rotatable about the axial direction. A pedestal 16 is provided on a side portion of the rod-shaped member 11 in parallel with the rod-shaped member 11, and an application mechanism 12 is fixed to the pedestal 16 along the axial direction of the rod-shaped member 11.

In the coating mechanism 12, the nozzle 17 has the pipe 1
It is configured to be connected to the lubricating oil tank 18 via 9.
The nozzle 17 is connected to a cylinder 22 attached to the pedestal 16 via a link 27, and by expanding and contracting the cylinder 22, the nozzle 17 can rotate about an axis line. The direction of injection of lubricating oil is swingable.

A recovery tray 23 for recovering excess lubricating oil sprayed toward the rod-shaped member 11 by the nozzle 17 is attached to a portion of the base 10 facing the coating mechanism 12. This recovery tray 23 is a pipe 24
It is connected to the lubricating oil recovery tank 25 via. The lubricating oil recovery tank 25 is connected to the lubricating oil tank 18 via a pipe 26, and a pump 20 for pumping the lubricating oil toward the nozzle 17 is installed in the pipe 26 in series.

Next, referring to FIG. 1, the operation of the lubricating oil coating apparatus of this embodiment will be described, and the coating method of one embodiment of the present invention will be described.

First, the pipe 2 to be drawn is inserted into the rod-shaped member 11, and the rod-shaped member 11 is rotated around the axial line. Next, the pump 20 is driven to supply the lubricating oil from the lubricating oil tank 18 to the nozzle 17. As a result, the lubricating oil is sprayed from the nozzle 17 to the rod-shaped member 11 toward the outer peripheral surface, and the lubricating oil film A is formed on the outer peripheral surface of the rod-shaped member 11.

Next, the moving mechanism 13 is driven to press the rear end of the tube 2 to move the tube 2 along the axis of the rod-shaped member 11. When the tip of the pipe 2 reaches below the nozzle 17, the lubricating oil sprayed from the nozzle 17 enters the inside of the pipe 2 to form a lubricating oil reservoir B on the inner surface of the inlet of the pipe 2. To be done.

Further, when the moving mechanism 13 is driven to move the pipe 2, the lubricating oil adhered to the outer peripheral surface of the rod-like member 11 and formed into the film A becomes an oil droplet C due to gravity, and the inner surface of the pipe 2 is formed. Drop on. As a result, when the pipe 2 is moved, a film D of lubricating oil is formed on the inner surface of the pipe 2.

As described above, the pipe 2 having the lubricating oil reservoir B and the film D formed on the inner surface thereof is inserted into the drawing die, and the rod-shaped member (mandrel) 11 is inserted into the pipe 2 to form the pipe 2 The tube 2 is subjected to a drawing process by drawing. At this time, since the lubricating oil reservoir portion B is formed on the inner surface of the inlet of the pipe 2, the contact portion with the end portion of the mandrel is lubricated by the lubricating oil, and a smooth drawing process can be performed. Further, as the pipe 2 is drawn out, the oil film D is continuously absorbed by the lubricating oil sump B, and a smooth drawing process is performed over the entire length of the pipe 2 with the lubricating oil sump B being maintained. Can be given.

In the present embodiment, the lubricating oil applied to the outer peripheral surface of the rod-shaped member 11 by the application mechanism 12 drops onto the inner surface of the pipe 2 which is moved with respect to the rod-shaped member 11 by the moving mechanism 13 and is applied to the inner surface. Is applied. Therefore, it is not necessary to consider the pressure loss at the time of supplying the lubricating oil, and the lubricating oil pump 20 in the application mechanism can be downsized. Further, it is possible to prevent useless operation of the pump 20.

Further, in this embodiment, since the mandrel is used as the rod-shaped member 11, the pipe 2 is coated on the inner surface thereof and then the pipe 2
Can be continuously drawn out by a drawing die, and productivity can be improved.

Further, in this embodiment, since the nozzle 17 is swung by the cylinder 22 and the rod-shaped member 11 is rotated around the axis, the lubricating oil is applied to the outer surface of the rod-shaped member 11. The coating can be applied uniformly, so that the film D of the lubricating oil can be uniformly formed on the inner surface of the pipe 2, whereby the drawing process can be performed smoothly.

[0024]

As described above, according to the lubricating oil cloth device for the inner surface of the pipe of the present invention, the rod-shaped member inserted into the pipe so as to be relatively movable in the axial direction, and the pipe of the rod-shaped member. A coating mechanism that applies lubricating oil to the outer peripheral surface exposed from the end,
Since the rod-shaped member and the pipe are provided with a moving mechanism that relatively moves the pipe in the axial direction, the lubricating oil applied to the outer peripheral surface of the rod-shaped member by the coating mechanism is moved by the moving mechanism with respect to the rod-shaped member. No need to consider the pressure loss when supplying lubricating oil, as it is dropped onto the inner surface of the
The pumping device for lubricating oil in the coating mechanism can be downsized, and it is not necessary to separately operate the pumping device immediately before withdrawing, so that wasteful operation of the pumping device can be prevented.

According to the method of applying the lubricating oil to the inner surface of the pipe of the present invention, the rod-shaped member is inserted into the pipe so as to be relatively movable in the axial direction, the lubricating oil is applied to the rod-shaped member, and then the rod-shaped member is applied. And the pipe are moved relative to each other in the axial direction, and the lubricating oil applied to the rod-shaped member is dropped onto the inner surface of the pipe to be applied, so that the inner surface of the pipe moved while being inserted into the rod-shaped member. No need to consider the pressure loss at the time of supplying the lubricating oil, which is applied to the inner surface of the lubricating oil, and the lubricating oil pressure feeding device in the applying mechanism can be downsized. There is no need to drive separately,
Useless operation of the pressure feeding device can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic view showing a device for applying a lubricating oil to an inner surface of a pipe according to an embodiment of the present invention.

FIG. 2 is a side view showing an apparatus for applying a lubricating oil to an inner surface of a pipe according to an embodiment of the present invention.

FIG. 3 is a front view of FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is a cross-sectional view showing a conventional device and method for applying lubricating oil to the inner surface of a pipe.

[Explanation of reference numerals] 2 tube 10 base 11 bar-shaped member 12 coating mechanism 13 moving mechanism

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B21B 17/08 Z 45/02 310 8015-4E

Claims (2)

[Claims] 1. A device for applying lubricating oil to an inner surface of a pipe for applying lubricating oil to the inner surface of the pipe, wherein the rod-shaped member is inserted into the pipe so as to be relatively movable in the axial direction. Application of lubricating oil to the inner surface of the pipe, characterized by including a coating mechanism for applying lubricating oil to the outer peripheral surface exposed from the end, and a moving mechanism for relatively moving the rod-shaped member and the pipe in the axial direction. apparatus. 2. A method for applying lubricating oil to an inner surface of a pipe, wherein a rod-shaped member is inserted into the pipe so as to be relatively movable in an axial direction, and the lubricating oil is applied to the rod-shaped member. After application, the rod-shaped member and the pipe are relatively moved in the axial direction, and the lubricating oil applied to the rod-shaped member is dropped onto the inner surface of the pipe to be applied to the inner surface of the pipe. Lubricant application method.