JP2844941B2 - Manufacturing method and manufacturing apparatus for cylindrical body with flange - Google Patents

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 manufacturing a flanged cylinder by assembly utilizing diffusion bonding.

[0002]

2. Description of the Related Art A bush used for a power shovel has conventionally been manufactured by cutting a round bar.
FIG. 4 shows a method of manufacturing a bush by shaving from a round bar. In this method, first, a cylindrical body with a flange 2 is cut out from a round bar 1. Next, after the flanged cylindrical body 2 is heat-treated, it is finished to form a bush 3.

[0003]

In such a bush manufacturing method, a large amount of material loss occurs when the flanged cylindrical body 2 is cut from the round bar 1 and the yield is poor. Also, it takes a long time to cut out and the efficiency is low. Therefore, the production cost is high and the productivity is low.

An object of the present invention is to provide a method and an apparatus for manufacturing a cylindrical body with a flange at low cost and efficiency.

[0005]

According to the manufacturing method of the present invention, a cylindrical member and a flange member are concentrically overlapped with an insert material interposed therebetween, and the overlapped member is restrained in the axial direction. At the same time, in a state where the inner surface and the outer surface of the superposed body are replaced with the shielding gas, the vicinity of the mating surface of the superposed body is heated from the inner surface and the outer surface to the melting point of the insert material or more, and both members are diffused. It is characterized by joining.

The manufacturing apparatus according to the present invention is a vertically movable movable support for vertically supporting a superposed body in which a cylindrical member and a flange-shaped member are concentrically superposed with an insert material interposed therebetween. A lid that presses the stacked body on the support from above and restrains the stacked body in the axial direction, a chamber that covers at least the vicinity of the mating surface of the stacked body from the outer surface side,
An annular high-frequency heating coil for the outer surface which is disposed in the chamber and surrounds the vicinity of the mating surface of the superimposed body; and an annular high-frequency heating coil which is located on the inner surface side of the superimposed body and faces the inner peripheral surface near the mating surface. A high-frequency heating coil for the inner surface and gas supply means for supplying a shielding gas into the chamber and the superposed body are provided.

[0007]

In the method of manufacturing a cylindrical body with a flange according to the present invention, the vicinity of the mating surface of the overlapped body is heated by high frequency so that the insert material interposed in the mating surface is melted, and the cylindrical member and the flange forming the overlapped body are heated. The cylindrical member is diffusion bonded to form a flanged cylinder. At this time, since the vicinity of the mating surface is subjected to high-frequency heating from the inner surface side and the outer surface side, uniform heating is performed over the entire mating surface despite the different outer diameters of the cylindrical member and the flange-shaped member. In addition, a sufficient joining pressure is applied to the mating surface due to a reaction force caused by the elongation of the overlapped body in the axial direction accompanying the heating. Accordingly, an assembled flanged cylinder having a strength comparable to that of an integrated flanged cylinder formed by shaving can be obtained.

In the apparatus for manufacturing a cylindrical body with a flange according to the present invention,
With the superposed body placed on the support table, the lid closed, and the superposed body constrained in the axial direction, while supplying shielding gas into the chamber and the superimposed body, each high frequency for the outer surface and the inner surface is supplied. Energize the heating coil. This allows
The vicinity of the mating surface of the stacked body is uniformly heated from the outer surface side and the inner surface side to the entire mating surface, and the insert material interposed in the mating surface is melted. In addition, a sufficient joining pressure is applied to the mating surfaces due to a reaction force due to thermal expansion in the axial direction of the overlapped body. As a result, the cylindrical member and the flange member are diffusion-bonded with sufficient bonding strength. At this time, the support for supporting the superposed body is movable in the vertical direction. Alignment in the axial direction can be prepared and performed with high precision, and further, it is easy to set the superimposed body on the support base and take out the flanged cylinder from the support base. Further, the lid that restrains the superposed body suppresses the escape of the shielding gas supplied into the superposed body.

An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show an example of an apparatus for manufacturing a cylindrical body with a flange according to the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view, and FIG.
Is a front view.

[0010] The manufacturing apparatus shown here has a cylindrical member 10.
And a box-shaped support base 14 for supporting the superposed body 13 in which the flange-shaped member 11 is concentrically superposed. The support base 14 is disposed above the gantry 15 and is vertically movable by a plurality of vertical rods 16. A screw 17 is vertically mounted on the lower surface of the support base 14. Screw 1
Reference numeral 7 is screwed to one of the bevel gears 18 and 19, and the other is rotated by the handle 20 to be driven in the axial direction to move the support base 14 up and down.

A single-sided lid 21 is connected to the support base 14 by a connecting body 22. The lid 21 is attached to the support base 14.
The upper body 13 is put on the upper body 13 from above and tightened downward by a plurality of bolts 24 pivotally supported by a projecting portion 23 projecting to the side of the support body 22. Pressure down.

An annular chamber 25 is provided between the support 14 and the lid 21. The chamber 25 includes the flange-shaped member 11 constituting the superimposed body 13 on the support base 14,
A plurality of legs 26 support the gantry 15 so as to surround the upper half of the cylindrical member 10. A heat insulating material 36 is lined in the chamber 25, and a radiation thermometer 27 is attached.

Inside the chamber 25, annular high-frequency heating coils 29, 30 for the outer surface are arranged in two stages. The large-diameter heating coil 29 located at the upper position surrounds the flange-shaped member 11 from the outside, and the small-diameter heating coil 30 located at the lower position surrounds the upper end of the cylindrical member 10 from the outside.
Inside the heating coils 29, 30, high-frequency heating coils 31, 32 for the inner surface having an annular shape and the same diameter are provided inside the heating coils 29, 3.
It is arranged in two stages above and below concentrically with respect to zero. The upper heating coil 31 faces the inner peripheral surface of the flange-shaped member 11,
The lower heating coil 32 faces the inner peripheral surface of the upper end of the cylindrical member 10. Each of these heating coils 29 to 32 is formed of a copper square pipe having a water passage inside, and is connected in series to a transformer (not shown).

Further, a shielding gas such as N ₂ gas is supplied from the nozzle 33 into the chamber 25, and similarly, a shielding gas such as N ₂ gas is supplied from the nozzle 34 into the superimposed body 13. You.

The method for manufacturing a flanged cylinder of the present invention is carried out as follows using the above-described manufacturing apparatus.

First, the handle 20 is turned to raise the support base 14 to a position near the chamber 25. In this state, after opening the lid 21 and placing the cylindrical member 10 on the support base 14,
The flange member 11 is concentrically superimposed on the cylindrical member 10 with the insert material interposed therebetween. The collar member 11 has the same inner diameter as the cylindrical member 10 and a larger outer diameter. As insert material,
For example, a nickel-based amorphous foil is used.

The flange member 1 is attached to the cylindrical member 10 on the support base 14.
When 1 is overlaid, the handle 20 is turned to lower the support base 13 in order to lower the superimposed body 13. At this time, the mating surface 12 of the superimposed body 13 is
2 so that the appropriate level for
Adjust the vertical position while watching the image. When the upper half of the stack 13 is accommodated in the chamber 25 by adjusting the position of the stack 13, the lid 21 is closed and tightened by bolts 24 to apply a vertical load to the stack 13. Then, a shield gas is supplied from the nozzles 33 and 34 into the inside of the chamber 25 and the superimposed body 13, and the inside is replaced with the shield gas. Add. The lid 21 also contributes to the prevention of the escape of the shielding gas supplied into the superimposed body 13.

When the heating coils 29 to 32 are energized, the flange-shaped member 11 of the superposed body 13
The heating coil 30 heats the outer and inner peripheral portions from below and from the lower side. The upper end of the cylindrical member 10 has the heating coil 3.
0, 32 heats from the outer surface side and the inner surface side. As a result, the vicinity of the mating surface 12 is uniformly heated in a short time over the entire mating surface 12 irrespective of the outer diameters of the cylindrical member 10 and the collar member 11 being different. Then, by this heating, the insert material sandwiched between the mating surfaces 12 is melted.

At this time, the insert material is uniformly melted by the uniform heating of the mating surface 12. Further, with this heating, the laminated body 13 also thermally expands in the vertical direction. Since the overlapping body 13 is restrained in the vertical direction by the fastening of the lid 21, a sufficient joining load is applied to the mating surface 12 by the reaction force of the thermal expansion. Thus, the flange-shaped member 11 and the cylindrical member 10 are diffusion-bonded with sufficient strength, and a high-quality flanged cylinder is manufactured.

When the flanged cylinder is manufactured, the support 20 is raised by turning the handle 20, the lid 21 is opened, and the flanged cylinder is taken out. At this time, the support 1
4, the heating coils 29, 30 and the heating coil 3
Since the upper half of the cylindrical body with the flange is exposed above the chamber 25 from between the first and second chambers, the work of taking out the cylindrical body with the flange becomes easy. The manufactured cylindrical body with a flange is subjected to a finishing process after a heat treatment to be a bush for a power shovel.

Using the apparatus shown in FIGS. 1 to 3, the method of the present invention was carried out under the conditions shown in Table 1 to produce a cylinder with a flange used for a bush for a power shovel. The manufactured flanged cylinder was evaluated by various tests such as a succession test, a flat (compression) test, and a shear test. As a result, the tensile strength was 60 ° kgf /
mm ² , flatness 18.5 TON, shear stress 40.3 kg
It was confirmed that the flanged cylindrical body had a joint performance of f / mm ² and the same level as that manufactured by conventional machining.

[0022]

[Table 1]

Although the above embodiment is an example in which a flanged cylinder used for a bush for a power shovel is manufactured, it goes without saying that the present invention can be applied to the manufacture of a flanged cylinder used for other applications. .

[0024]

As is apparent from the above description, the method of manufacturing a flanged cylinder according to the present invention requires a flange-shaped irregular shape for which high strength is required, such as for a bush, which had to rely on shaving. The cylinder can be manufactured to a problem-free strength by the assembly method using diffusion bonding. Therefore, pipes and the like can be used for the production thereof, and the material cost and the number of processing steps can be significantly reduced.

Further, in addition to the above effects, the manufacturing apparatus of the present invention allows the support for supporting the superimposed body to move up and down, so that the superimposed body and the high-frequency heating coil can be easily positioned. Since it becomes easy to set and take out the superimposed body from the support table, the above method can be efficiently performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a method for manufacturing a cylindrical body with a flange, showing an embodiment of the present invention.

FIG. 2 is a plan view of an apparatus for manufacturing a cylindrical body with a flange, showing an embodiment of the present invention.

FIG. 3 is a front view of an apparatus for manufacturing a cylindrical body with a flange, showing an embodiment of the present invention.

FIG. 4 is a schematic view showing a bush manufacturing process using a conventional method of manufacturing a flanged cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cylindrical member 11 Flange member 13 Laminated body 14 Support base 21 Lid 29, 30 High frequency heating coil for outer surface 31, 32 High frequency heating coil for inner surface 33, 34 Shield gas supply nozzle

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23K 20/00 H05B 6/10 371

Claims (2)

(57) [Claims] 1. A cylindrical member and a flange-like member are concentrically superposed on each other with an insert material interposed therebetween, and the superposed body is restrained in an axial direction, and an inner surface side and an outer surface side of the superposed body. In a state in which is replaced with a shielding gas, the vicinity of the mating surface of the superimposed body is heated from the inner surface and the outer surface to the melting point of the insert material or more, and the two members are diffusion-bonded, wherein Manufacturing method. 2. A vertically movable movable supporter for vertically supporting a superposed body in which a cylindrical member and a flange-shaped member are concentrically superposed with an insert material interposed therebetween, and the supporter is vertically movable. A lid that presses the upper superposed body from above to constrain it in the axial direction, a chamber that covers at least the vicinity of the mating surface of the superposed body from the outer surface side, An annular high-frequency heating coil for the outer surface surrounding the mating surface and an annular high-frequency heating coil for the inner surface positioned on the inner surface side of the superposed body and facing the inner peripheral surface near the mating surface,
A gas supply means for supplying a shielding gas into the chamber and the superimposed body.