JPH07266032A - Brazing jig - Google Patents

Abstract

PURPOSE:To obtain a brazing jig which can apply at the time of brazing-joining curving members in the vacuum in the manufacture of a nuclear fusion apparatus plasma facing device and the other. CONSTITUTION:A fixed metallic mold 1 having an arc corresponding to a curvature inscribed with the curved brazing member and the other base plate 3 as radiating state from the center of the curvature are laid on a base plate 1. A movable metallic mold 4 having an arc circumscribed with the brazing member and a strapped metallic mold having 45 deg. inclining surface at the back surface are laid on the base plate 3. The brazing member inserted with plural pieces of half-cutting copper materials 8 centering a curved copper pipe 7 and winding a brazing filler metal thin piece on the outer periphery and carbon and carbon fiber composite 9 is horizontally arranged on the movable metallic mold by positioning both ends with guide plates 18. Plural pieces of weights 20 are laid on the upper surface of the inclined metallic mold, and the force applied to the vertical direction with the weights 20 and the weight of the inclining metallic mold is transmitted to the strapped metallic mold as the element in the horizontal direction, and the strapped metallic mold and the movable metallic mold 4 are shifted and acted as the pressurizing force to the brazing number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazing jig applied for brazing and joining curved members to each other in the production of a nuclear fusion device, a plasma facing device, and in other vacuum conditions.

[0002]

2. Description of the Related Art Generally, there are brazing and joining techniques in various vacuums in the industrial field, but no technique applied to products such as fusion plasma facing devices exists at the present stage.

[0003]

By the way, there are electric, air, hydraulic pressure, etc. as a drive source for obtaining the pressing force at the time of brazing, but since it is a work in a vacuum, the influence on the degree of vacuum and wiring treatment It is required to reduce the number of components, reduce the size and weight of the mechanism, and have a simple structure.

Further, since brazing is performed in a vacuum at a high temperature, it is necessary to take heat resistance measures.

Furthermore, it is necessary to simultaneously press a plurality of curved brazing members with a uniform pressing force, and it is required to position the plurality of brazing members so as not to shift.

An object of the present invention is to provide a new brazing jig which solves these problems.

[0007]

As a structure for achieving the above object, a brazing jig of the present invention is constructed by assembling a plurality of divided brazing members according to a curved member and simultaneously at high temperature and under vacuum. In a brazing device for brazing and joining with a uniform pressure, these are arranged horizontally on the base plate,
Inscribed on the arc of the curved brazing member on the base plate,
A fixed integral fixed-side die and a movable-side die that is circumscribed in the arc of the brazing member and is radially divided into a plurality of parts are arranged, and a gap between each die and the brazing member is provided. Each of the movable molds is individually adjustable and is configured to have uniform surface contact, and the movable mold is configured to slide horizontally via rollers. To the fixed side mold on the inscribed side, sliding vertically in the horizontal direction through rollers, and a vertical direction having an inclined surface that abuts the inclined surface provided on the mold. It is characterized in that a possible tilting mold is arranged, and a weight for applying a vertical static load is connected and arranged on the upper part of the tilting mold.

[0008]

The brazing jig of the present invention constructed as described above is
When assembling the inner brazing member and the outer brazing member to the curved member, there is no misalignment during brazing, it is easy to arrange, and it is easy to check the contact state with the mold, so that the horizontal horizontal orientation is stable. In this state, the base plate is assembled.

The movable die is moved horizontally toward the fixed die, and the abutment die for pressing the movable die is attached to the inclined surface of the die. The vertical force due to the self-weight of the mold acting on the inclined surface of the inclined mold and the load of the weight applied to the inclined mold is converted into the horizontal force, that is, the pressing force applied to the brazing member side, The pressure can be adjusted by adjusting the number of weights.

Further, the movable mold on the circumscribing side is divided into a plurality of parts so as to uniformly apply a pressing force to each brazing member with respect to the curved member and arranged radially.

Further, the metal molds on the inscribed side and the circumscribed side are brought into surface contact with the brazing member, and the metal molds are individually provided with metal fittings corresponding to the respective brazing members in a radial pattern at equal pitches. Provided. At this time, for the metal fittings on the circumscribing side, bolts should be embedded in the molds in correspondence with the metal fittings so that the metal fittings can be moved back and forth at the tips of the bolts by inserting and removing the bolts. The gap of the contact surface with and was adjusted so that it could be applied uniformly to all brazing members.

As a result, even if a gap is produced between the metal fitting and the metal fitting due to the finishing tolerance of the member, it can be pressed with a bolt to correct the lifting of the brazing member and obtain a uniform surface contact.

The curvature of the entire bending member is corrected to the size of the mold by heating during brazing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a brazing jig of the present invention, FIG. 2 is a sectional view taken along the line AA, and FIG.

In these figures, a fixed side mold 2 having an arc corresponding to a curvature inscribed in a curved brazing member and a center of the curvature are radially disposed on the base plate 1 at three symmetrical positions. Further, another base plate 3 is placed and fixed.

On each of the base plates 3 placed on the base plate 1, there are two alumina-based ceramic members which are opposed to each other with a plurality of rollers 6 of alumina-based ceramic material arranged in parallel at radial front and rear positions. A movable die 4 having an arc corresponding to the curvature circumscribing a brazing member having a curved shape via a sliding plate 5 made of a ceramic material, and a backing die 14 having an inclined surface having an angle of 45 ° on the back surface are provided. I have posted it.

A brazed thin piece may be wound around the curved copper tube 7 on the movable side mold 4 in the center and sandwiched by a plurality of half-cracked copper materials 8 and carbon-carbon fiber composite material 9. Both ends of the attaching member are positioned horizontally by the guide plates 18 and arranged horizontally.

A contact metal fitting 10 is provided on the contact surface between the fixed mold 2 and each carbon-carbon fiber composite material 9 so as to make surface contact.

On the contact surface between the movable die 4 and each copper material 8, a metal fitting 11 is provided so as to make surface contact, and each metal fitting 11 is attached to the movable metal die 4.
Corresponding to the above, the push bolt 12 is embedded horizontally, and when the push bolt 12 moves in and out, the metal fitting 11 is moved back and forth to adjust the contact state with the copper material 8.

The movable side mold 4 is provided with a carbon material receiving plate 13 having a groove in accordance with the mating surface position so that the movable side mold 4 and the brazing member do not adhere to each other by the brazing material protruding downward during brazing. It is provided.

A support 17 is fixed to the rear end of the base plate 3 arranged radially, and an angle of 45 ° is provided between the support 17 and the pad mold 14 on the surface facing the inclined surface of the pad mold 14. An inclined mold 16 having an inclined surface is formed, and two sliding plates 15 made of carbon material are provided on each contact surface of the vertical surface and the inclined surface.
It is sandwiched between.

On the upper surface of the inclined mold 16, a plurality of weights 20 which penetrate the guide shaft at the center are stacked.

Next, the operation of this apparatus will be described.
At the time of brazing, first, with the contact metal mold 14, the tilt metal mold 16 and the like removed, a push bolt is installed at the rear slide plate 5 on the base plate 3 radially installed on the base plate 1. Two
The bracket 22 to which 1 is attached is installed, and the front and rear positions of the movable side mold 4 at three locations are evenly adjusted by the push and pull of the bolt 21, and fixed and positioned.

Next, the gap between each of the metal fittings 11 and the copper material 8 is adjusted by moving the metal fittings 11 back and forth by pushing in and out of the push bolts 12 so that all of them are in uniform surface contact.

At this time, even if the copper material 8 is lifted up from the copper tube 7 and the brazing material thin piece wound around the outer periphery due to the processing tolerance, the metal fitting 11 is pressed to correct. The tightening torque is
Manage with a torque wrench.

When it is decided that the metal fitting 11 should be removed, the bracket 22 is removed, and the metal mold 14, the inclined metal mold 16 and the like are incorporated.

The pressing force is applied to the inclined mold 16 by the load W in the direction of the arrow due to the weight of the weight 20 and the inclined mold 16 at three locations simultaneously.
Sliding by the sliding plate 15 before and after is transmitted as a component force F to the abutting die 14 in the direction of the arrow, and the abutting die 14 and the movable side die 4 move in the arrow F direction due to the sliding of the sliding plate 5 and 6. , Acts as a pressing force on the brazing member.

For example, when the pressure applied to each of the 26 brazing parts is 15 kgf, the pressure applied to each of the three pressurizing mechanism parts is 120 kgf and 150 kgf if there are 8 and 10 positions, respectively. Becomes

The degree of vacuum may be 1 × 10 ^-6 Torr and the brazing temperature may be 900 to 1,000 ° C. for several hours, that is, the holding time after heating may be 2 to 3 hours.

Although one embodiment of the present invention has been briefly described above, the present invention is not limited to the above embodiment, and design changes can be made within the scope of the technical idea of the present invention.
All of them belong to the technical scope of the present invention.

[0031]

As described above, according to the brazing jig of the present invention, the following effects can be obtained. (1) Since the structure is simple and there is no mechanism by a drive source such as electricity, air or hydraulic pressure for pressurization during brazing, there is no adverse effect on the degree of vacuum and no effect on the mechanism at high temperatures.

(2) A constant pressure can be applied to the entire surface of each brazing member.

(3) Since the pressurizing mechanism is divided into equal parts and is unitized, it is possible to cope with the brazing member being long and large.

[Brief description of drawings]

FIG. 1 is a plan view of a brazing jig according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram showing a brazing member incorporated in the brazing jig shown in FIG. 1;

[Explanation of symbols]

 1 Base Plate 2 Fixed Side Mold 3 Base Plate 4 Movable Side Mold 5 Sliding Plate 6 Roller 7 Copper Tube 8 Copper Material 9 Carbon / Carbon Fiber Composite Material 10, 11 Contact Metal 12 Push Bolt 13 Receiving Plate 14 Contact Metal 15 Sliding Plate 16 Tilt Mold 17 Support 18 Guide Plate 19 Guide Shaft 20 Weight 21 Push Bolt 22 Bracket

Claims (1)

[Claims] 1. In a brazing apparatus for assembling a plurality of brazing members according to a curved member and brazing and joining them simultaneously under high temperature and vacuum with a uniform pressing force, these are laterally arranged on a base plate. Is horizontally arranged on the base plate, is inscribed in the arc of the brazing member having a curved shape, is fixed to the fixed fixed die, and is circumscribed in the arc of the brazing member, and is radially divided into a plurality of parts. The movable side mold is arranged, and the gap between each mold and the brazing member can be individually adjusted so that all of them are in uniform surface contact. Configured to slide horizontally via
An abutting die for sliding the movable die on the circumscribing side toward the stationary die on the inscribed side in a horizontal direction through rollers and pressing it, and an inclination for abutting an inclined surface provided on the die. A brazing jig, comprising: an inclined mold having a surface and slidable in a vertical direction; and a weight connected to an upper part of the inclined mold for applying a vertical static load.