JP2001071134A - Build-up welding method for hole part and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To weld a hole part by build-up welding without using a strip in build-up welding method and its device for a hole part. SOLUTION: This method is a build-up welding one for a hole part 3a penetrating a base material 3, and has a step in which a sleeve 14 formed by a weld material is inserted into the hole part, and next step in which a friction bar, a part of outside diameter of which is at least larger than the inside diameter of the sleeve, is pressed into the hole part as it is turned, and in the sleeve, a flange 14a projecting largely toward outside of radius over a hole diameter of the hole part is provided at one side opening end, and the friction bar is pressed into the sleeve from the flange part side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for building a hole in a base material for building up a hole in a base material for repairing wear or cracks.

[0002]

2. Description of the Related Art In some cases, the inside of a hole is overlaid for wear or crack repair of the hole of a mechanical part. In the conventional method, the holes were built up by melt welding such as TIG welding (inert gas arc welding using a tungsten electrode).

When repairing a hole in a light metal such as an aluminum alloy,
When the overlay is formed by fusion welding such as TIG welding, the temperature becomes considerably high, so that the heat may cause deformation of the component or decrease in the mechanical strength of the material, resulting in poor overlay. As a countermeasure, for example, as shown in FIG. 3A, as a means for repairing the inside of a relatively small hole 3a formed in a base material 3 made of an aluminum alloy by overlaying the base material, An outer diameter is larger than an inner diameter of the sleeve 4 in a state in which a backing plate 5 is applied so as to close an opening end of the hole 3a on the lower surface side of the sleeve 3 and a sleeve 4 as a welding material is inserted in the hole 3a. A means has been proposed in which the friction rod 1 is rotated by a driving means 2 such as a motor, and is pressed into the hole 3a as shown in FIG. 3 (b).

According to this means, the friction rod 1 rotating at high speed is used.
The frictional rod 1 causes the plasticized sleeve 4 to plastically flow, and the welding material and the base material 3 are mixed and joined, and the hole 3
The inside of a is overlaid. In such a hole-building means, the welding material is plastically instantaneously flowed without raising the temperature to the melting point of the base material 3, so that deformation and reduction in strength are suppressed,
It is possible to form a good build-up of the hole 3a.

[0005]

However, the following problems remain with the conventional overlaying means. That is, in order to prevent the sleeve 4 as the welding material from shifting or falling off, it is necessary to apply the backing plate 5 to the lower side of the hole 3a, and it is possible to perform the overlaying without using the backing plate. could not. Therefore, when the backing plate cannot be arranged below the hole, it is difficult to build up the hole.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a method and an apparatus for overlaying a hole capable of overlaying the hole without using a backing plate. I do.

[0007]

The present invention has the following features to attain the object mentioned above. That is, in the method for overlaying a hole according to claim 1, a method for overlaying a hole penetrating a base material, wherein a sleeve formed of a welding material is inserted into the hole, Press-fitting the hole while rotating a friction bar having at least a part of the outer diameter larger than the inner diameter of the sleeve, wherein the sleeve includes:
A flange portion protruding radially outward from the hole portion and having a diameter larger than the hole diameter of the hole portion is provided at one opening end, and a technique is employed in which the friction rod is pressed into the sleeve from the flange portion side.

In the above-mentioned apparatus for filling a hole in a hole, it is preferable that the sleeve be formed of a welding material and be inserted into the hole. A friction bar having at least a portion of an outer diameter larger than the inner diameter of the sleeve, and driving means for rotating the friction bar and press-fitting the hole into the hole. Also, a flange portion that protrudes greatly is provided at one opening end, and the driving means employs a technique of press-fitting the friction rod into the sleeve from the flange portion side.

According to the method and the apparatus for building up the hole, the flange is provided at one of the opening ends on the sleeve so as to protrude radially outward beyond the hole diameter of the hole.
Since the friction bar is press-fitted into the sleeve from the flange portion side, the sleeve is supported by the flange portion being locked on the surface of the base material even if there is no abutment plate at the time of press-fitting, so that the sleeve does not shift or fall off.

According to a second aspect of the present invention, there is provided a method for overlaying a hole, the method including a step of inserting a cylindrical stirring member between the sleeve and the base material inserted into the hole from a direction opposite to the sleeve. A technique is employed in which the stirring member is rotated simultaneously with the friction bar and moved in the press-fitting direction in conjunction with the press-fitting of the friction bar.

According to a fourth aspect of the present invention, the cylindrical stirrer is inserted between the sleeve inserted into the hole and the base material from a direction opposite to the sleeve. The driving means employs a technique of rotating the stirring member simultaneously with the friction bar and moving the stirring member in the press-fitting direction in conjunction with the press-fitting of the friction bar.

In the method and the apparatus for building up the hole, the stirring member is rotated simultaneously with the friction bar and moved in the press-fitting direction in conjunction with the press-fitting of the friction bar. Can rotate at the boundary between the sleeve and the base material to directly agitate the joint surface, thereby making plastic flow more active.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a method and an apparatus for overlaying a hole according to the present invention will be described below with reference to FIG. In this figure, reference numeral 1 denotes a friction bar, 2
Is a driving means, 3 is a base material, and 14 is a sleeve.

As shown in FIG. 1, a cladding device used in the cladding method of this embodiment is, for example, a base material 3 made of an aluminum alloy (in this embodiment, a plate-like material having a uniform thickness). ) Is a device for repairing the inside of a relatively small hole 3a (for example, a hole for a pin) formed in
A friction rod 1 which is a rotatable plug formed of tool steel;
A driving means 2 for rotating the friction rod 1 at a predetermined number of rotations and for moving back and forth in the axial direction, and a hole 3 formed of a welding material.
a inserted into the sleeve 14.

The sleeve 14 is formed of an aluminum alloy, which is the same material as the base material 3, as a welding material, and has a flange projecting outwardly in the radial direction from the one end thereof with a diameter larger than the diameter of the hole 3a. A portion 14a is provided. The outer diameter of the sleeve 14 other than the flange portion 14a is slightly smaller than that of the hole 3a. The outer diameter of the friction bar 1 is set to be larger than the inner diameter of the sleeve 14.

A method for overlaying the holes 3a using the overlaying apparatus will be described below.

First, the sleeve 14 is inserted into the hole 3a of the base material 3.
And the flange portion 14a is brought into contact with the surface of the base material 3. Next, in this state, the driving means 2 rotates the friction bar 1 at a predetermined number of revolutions, and
Press into the sleeve 14 from the 4a side. At this time, the outer edge of the tip surface 1a of the friction bar 1 mainly contacts the sleeve 14 to generate frictional heat. The sleeve 14 and the base material 3 are heated by the frictional heat to a temperature lower than the melting point of the aluminum alloy forming the sleeve 14 and the base material 3 and to a temperature sufficient for plastic flow.

Further, when the friction rod 1 is press-fitted, the plasticizing component of the sleeve 14 flows on the tip end surface 1a, and the welding material and the base material 3 are mixed and joined, and the inside of the hole 3a is built up. Is done. At this time, the flange portion 14a is locked on the surface of the base material 3, and the sleeve 14 is supported. After the build-up, the flange portion 14a remaining on the opening end side of the hole 3a
Is removed by machining.

As described above, in this embodiment, the flange portion 14a projecting larger than the hole diameter of the hole portion 3a is provided at the open end of the sleeve 14, and the friction rod 1 is connected to the flange portion 14a.
Since the sleeve 14 is pressed into the sleeve 14 from the side, the flange 14a is locked to the surface of the base material 3 and the sleeve 14 is supported even if there is no contact plate at the time of press-fitting.

Next, a second embodiment of a method and an apparatus for overlaying holes according to the present invention will be described with reference to FIG.

The difference between the second embodiment and the first embodiment is that in the first embodiment, the sleeve 14 is directly inserted into the hole 3a.
With the friction rod 1 inserted, the sleeve 1
In contrast, in the second embodiment, as shown in FIG. 2, the sleeve 14 inserted into the hole 3a and the base material 3 are pressed into the hole 3a.
And the cylindrical stirring member 21 is inserted from the opposite direction to the sleeve 14 so that the stirring member 21 is rotated simultaneously with the friction bar 20 and moved in the press-fitting direction in conjunction with the press-fitting of the friction bar 20. different.

That is, the hole filling apparatus of the second embodiment includes a rotating shaft member 23 in which a stirring member 21 and a friction bar 20 are coaxially fixed and driven to rotate by the driving means 2. A press-fit portion 20a provided on the distal end side and having an outer diameter larger than the inner diameter of the sleeve 14 and an insertion rod portion 20b provided on the base end side having an outer diameter smaller than the inner diameter of the sleeve 14 and longer than the sleeve 14 are provided. It is detachably attached to the member 23.

The hole 3 using the cladding device of the second embodiment
The method of overlaying a will be described below.

First, the friction bar 20 is removed from the rotary shaft member 23 in advance, and the stirring member 21 is inserted into the hole 3a, and the sleeve 14 is inserted into the stirring member 21 from the opposite side. At this time, the flange 14a of the sleeve 14 is brought into contact with the surface of the base material 3, and the tip of the stirring member 21 is brought into contact with the flange 14a. Then, the removed friction bar 20 is attached to the rotating shaft member 23. The insertion rod portion 20b of the friction rod 20 is formed with a male screw portion (not shown) which is reversely threaded with respect to the rotation direction, and the male screw portion is formed on the rotary shaft member 23 with a female screw. It is screwed into a hole (not shown).

Next, in this state, while the friction bar 20 and the stirring member 21 are rotated, the press-fitting portion 20a is
The rotating shaft member 23 is moved in the axial direction so as to be pressed into the inside. That is, the press-fitting portion 20a is press-fitted so that the friction bar 20 inserted into the hole 3a is pulled out while rotating from the side opposite to the insertion side. Then, by the rotation and press-fitting of the press-fitting portion 20a, the plasticizing component of the sleeve 14 flows, and the welding material and the base material 3 are mixed and joined. At this time,
At the same time, the tip of the stirring member 21 rotating at the same time mixes the boundary between the sleeve 14 and the base material 3, and the inside of the hole 3a is filled up.

As described above, in the present embodiment, the stirring member 21
Is rotated simultaneously with the friction bar 20 and is moved in the press-fitting direction in conjunction with the press-fitting of the friction bar 20.
At the time of press-fitting, the tip of the stirring member 21 rotates at the boundary between the sleeve 14 and the base material 3 to directly stir the joint surface, and the plastic flow in the rotation direction can be further activated.

In each of the above embodiments, the sleeve 14
Although a welding material of the same material as the base material 3 was used in the above, the welding material may be formed of another material as long as the material is applicable to the overlay as the welding material.

[0028]

According to the present invention, the following effects can be obtained.
According to the hole-building method of the first aspect and the hole-building apparatus of the third aspect, the sleeve has a flange portion that projects radially outward and that is larger than the hole diameter of the hole portion. It is provided at the end, and the friction bar is pressed into the sleeve from the flange side, so the sleeve is supported by the flange at the time of press-fitting, so the sleeve does not shift or drop off, eliminating the need to use a contact plate etc. In addition, the present invention can be applied to parts and the like in which a backing plate cannot be installed.

According to the hole filling method of the second aspect and the hole filling apparatus of the fourth aspect, the stirring member is rotated simultaneously with the friction bar, and the press-fitting direction is interlocked with the press-fitting of the friction bar. During the press-fitting of the friction rod, the tip of the stirring member rotates at the boundary between the sleeve and the base material to directly stir the joint surface, which can further activate the plastic flow and further improve the joint. Obtainable.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a state at the time of press-fitting in a first embodiment of a method for overlaying holes and an overlaying apparatus according to the present invention.

FIG. 2 is a sectional view of a main part showing a state at the time of press-fitting in a second embodiment of a method for overlaying holes and an overlaying apparatus according to the present invention.

FIG. 3 is a cutaway perspective view of a main part showing a state before press-fitting and a cross-sectional view of a main part showing a state at the time of press-fitting in a conventional example of a method of building up a hole and a building-up device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 20 Friction rod 2 Drive means 3 Base material 3a Hole 14 Sleeve 14a Flange 20a Press-fitting part 20b Insertion rod 21 Stirring member 23 Rotary shaft member

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takeshi Kashiwagi 229 Togaya, Mizuho-cho, Nishitama-gun, Tokyo Ishikawashima-Harima Heavy Industries, Ltd. Mizuho Plant F-term (reference) 4E067 AA05 BG00 BG02 EA00

Claims (4)

[Claims] 1. A hole (3a) penetrating through a base material (3).
A step of inserting a sleeve (14) formed of a welding material into the hole, and rotating a friction rod (1) having at least a part of an outer diameter larger than the inner diameter of the sleeve. Press-fitting into the hole while the sleeve is provided with a flange portion (14a) projecting radially outward beyond the hole diameter of the hole at one of the open ends, A method for overlaying a hole by press-fitting the inside of the sleeve from the side of the flange. 2. A step of inserting a cylindrical stirring member (21) between the sleeve (14) inserted into the hole (3a) and the base material (3) from a direction opposite to the sleeve. The method according to claim 1, wherein the stirring member is rotated simultaneously with the friction bar (20) and is moved in the press-fitting direction in conjunction with the press-fitting of the friction bar. 3. A hole (3a) penetrating the base material (3).
A cladding device comprising: a sleeve (1) formed of a welding material and inserted into the hole;
4), a friction bar (1) having at least a portion of an outer diameter larger than the inner diameter of the sleeve, and a driving means (2) for rotating the friction bar and press-fitting the hole into the hole. A flange portion (14a) protruding radially outward beyond the hole diameter of the hole portion is provided at one opening end; and the driving means press-fits the friction bar into the sleeve from the flange portion side. A filling device for a hole portion, characterized in that: 4. A cylindrical stirring member (21) inserted from a direction opposite to the sleeve between the sleeve (14) inserted into the hole (3a) and the base material (3). The driving means (2) is configured to connect the stirring member to the friction rod (2).
4. The hole overlaying apparatus according to claim 3, wherein the apparatus is rotated simultaneously with 0) and is moved in the press-fitting direction in conjunction with the press-fitting of the friction bar.