JPH10175063A - Brazing construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve toughness and dimensional precision of a joined part by arranging a brazing filler metal pool to hold a prescribed quantity of the brazing filler metal to a fitting material end part when inserting a fitting end part of a fitting material into a fitting recessed part arranged to a member and conducting vacuum brazing. SOLUTION: When a round bar like member 2 (bar) is vertically brazed to a plate like member 1 (plate) with using a wire brazing filler metal A, a fitting recessed part, which has an inner diameter (bar diameter + 0.2mm) slightly larger than a bar 2, is arranged to a plate 1. Further, a recessed part 4 for an annular brazing filler metal pool is arranged to an outer periphery of a fitting end of the bar 2 as an inserting member. The recessed part 4 for brazing filler metal has a size enough for surely accommodate/hold the wire brazing filler metal A (about 1.8mm height, width in the case of 1.3mm wire brazing filler metal). Also, a depth of the fitting recessed part 3 is set so as to obtain an enough joining area with an outer peripheral face of the bar 2. In brazing, an appropriate quantity of the wire brazing filler metal A is coiled to the recessed part for brazing filler metal and then vacuum brazing is conducted with fixing a conventional fixing jig.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazing structure, and more particularly to a brazing structure suitable for joining members having good appearance and high rigidity and dimensional accuracy.

[0002]

2. Description of the Related Art As one means for joining various members, joining by brazing is widely performed. As the brazing structure at this time, a structure corresponding to the type of the brazing material to be used and the shape of the joint of the members is adopted. For example, a structure in which the paste brazing material is placed in the outer peripheral portion of the joining portion or in a groove around the outer peripheral portion, a structure in which the wire brazing material is placed in the groove around the joining portion, a brazing clad plate material, a brazing foil material, a paste brazing material. There are known a structure in which the paste brazing material is placed inside the joining surface as it is and a groove is formed in the joining surface to place the paste brazing material.

[0003]

However, the conventional brazing structure in brazing (vacuum brazing) is intended to securely join members to be joined, such as the entire joint surface and the strength of the joint. Therefore, it was not possible to reliably control the amount of seepage of the brazing material to the outer periphery of the brazing part and the dimensional accuracy of the main part after brazing.

[0004] For example, if the amount of the exuded wax is large, the commercial value is lost in appearance, or the surface treatment after brazing is affected. Further, the conventional brazing has been inappropriate for products requiring high dimensional accuracy. In particular, when a wafer carrier used in the semiconductor manufacturing process is formed by brazing aluminum members, various ions are eluted from the wafer carrier when the wafer held in the wafer carrier is washed in pure water. Surface treatment to cover the entire wafer carrier with an oxide film, but it is difficult to form a sufficient oxide film on the oozing wax part. I needed to.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a brazing structure that can reduce the amount of wax exudation and can obtain high dimensional accuracy.

[0006]

In order to achieve the above object, a brazing structure according to the present invention is characterized in that a fitting end of another member is inserted into a fitting recess provided in one member and brazing is performed. In the brazing structure to be performed, a hole-shaped or groove-shaped concave portion for holding a brazing material for holding a predetermined amount of brazing material is provided at a fitting end portion of the insertion-side member. At least one of the brazing portions of the member is provided with a capillary portion or a slit through which the molten braze can flow by capillary action, preferably, the diameter of the capillary portion or the width of the slit is 0.01 to 0.1 mm. It is characterized in that it is 6 mm.

According to the above configuration, by controlling the amount of the brazing material to be filled in the recess for brazing, it is possible to control the amount of oozing of the brazing after brazing, and to achieve high dimensional accuracy and high soundness. A joined state is obtained. At this time, if a recess for brazing is provided in the member on the insertion side, it becomes structurally unstable, and it becomes difficult to control the dimensional accuracy after brazing. Further, by providing a thin tube portion or slit having an appropriate space volume in communication with the brazing portion, excess brazing can be absorbed by the thin tube portion or slit,
The amount of wax exudation can be controlled more reliably.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a first embodiment of the present invention, in which a round bar-shaped member (bar material) 2 is vertically brazed to a plate-shaped member (plate material) 1 using a wire brazing material A. is there. The plate member 1 is provided with a fitting recess 3 having an inner diameter slightly larger than the outer diameter of the bar 2, for example, an inner diameter 0.2 mm larger than the outer diameter of the bar 2. A ring-shaped recess 4 for brazing is provided on the outer periphery of the fitting end 2.

The recess 4 for brazing is formed to have a size sufficient to securely hold and hold the brazing material A. For example, when the brazing material A having a thickness of 1.3 mm is used. May be formed with a height and a width of about 1.8 mm.
On the other hand, the depth of the fitting concave portion 3 may be set so as to obtain a sufficient joint area with the outer peripheral surface of the bar 2. In addition, it is desirable to perform an appropriate chamfering process on the opening edge of the fitting concave portion 3 in order to facilitate the insertion of the bar 2.

After a suitable amount of the brazing material A is wound around the brazing recess 4 so as to be wound, for example, a known fixing jig 5 as shown in FIG. The two are fixed and heated to a predetermined temperature in a vacuum heating furnace to melt the brazing material, so that the two are brazed and joined (brazing). In addition, as the fixing jig 5,
Although it is possible to use a member having an appropriate configuration according to the shape of the members to be joined, generally, as shown in FIG. 2, upper and lower holding members 5a and 5b for sandwiching both members to be joined, and the holding members It is formed of columnar connecting members 5c and 5d for tightening and fixing 5a and 5b, and bolts and nuts.

When brazing in this manner,
By controlling the amount of the wire brazing material A to be used by weight or length, it is possible to control the amount of brazing that oozes to the outer periphery of the brazing portion while maintaining a sound joining state. It is possible to eliminate it.

FIG. 3 shows a second embodiment of the present invention. In the first embodiment, an axial narrow tube portion 6 opening at an insertion side fitting end which is a brazing portion of the bar 2 is shown. It is provided. The capillary portion 6 is formed in a position and a size near the brazing recess 4 so that the brazing melted at the time of brazing can flow in by capillary action. The diameter is preferably from 01 to 0.6 mm, and the diameter and the length may be appropriate depending on the amount of the brazing material to be absorbed in the thin tube portion 6. By providing the thin tube portion 6 in this manner, an excess amount of wax that is more than necessary for joining the two members can be absorbed into the thin tube portion 6 by capillary action, and the amount of seepage of the wax can be more reliably reduced. Can be controlled. This is because, when performing vacuum brazing in a vacuum heating furnace, after elevating the inside of the furnace to a predetermined degree of vacuum before the heating step, the temperature is raised to a desired temperature, so that when the wax melts, the amount that oozes out into the capillary. This is because it is absorbed.

FIG. 4 shows a third embodiment of the present invention, in which a plate-like member (not shown) having a fitting recess similar to that described above and a bar 7 are clad brazing material or clad brazing material. An example is shown in which a joint is made by using a paste brazing filler metal together with a brazing paste. At the tip of the bar 7, a hole-shaped recess 8 for brazing is provided. In the recess 8 for brazing, a clad brazing material 8a of a controlled amount is placed or brazed. After the clad brazing material 8b and the paste brazing material 8c whose amounts are controlled are placed in the recessed portions 8, they are heated in a vacuum heating furnace using the same fixing jig as described above, and brazed. Also in this case, the clad brazing plates 8a, 8
By controlling the amount of b and the paste brazing material 8c, it is possible to control the amount of wax exudation while maintaining a sound joining state.

FIG. 5 shows a fourth embodiment of the present invention, in which the brazing recess 8 of the bar 7 shown in the third embodiment is shown.
A thin tube portion 6 opening inside is provided. The capillary portion 6 is provided for absorbing excess wax by capillary action, as in the second embodiment.

FIGS. 6 and 7 show a fifth embodiment of the present invention, in which plate members 11 and 12 are joined by brazing. One of the plate members 11 is provided with a groove-shaped fitting recess 13 for inserting the fitting end of the other plate member 12, and a wire brazing material or a paste is provided on the insertion-side fitting end surface of the other plate member 12. A groove-shaped recess 14 for holding the brazing material for holding the brazing material is provided.

Also in this embodiment, after a predetermined amount of brazing material is placed in the brazing recess 14 of the plate 12, the plate 12 is inserted into the fitting recess 13 of the plate 11, and brazing is performed in the same manner as described above. By doing so, it is possible to perform brazing joining in which the exudation of the brazing is suppressed.

FIGS. 8 and 9 show a sixth embodiment of the present invention, in which a slit 15 opening in the brazing recess 14 is provided in the plate member 12 of the fourth embodiment. . This slit 15 is provided to absorb excess wax by capillary action, like the capillary section 6 shown in the second embodiment and the fourth embodiment, in order to surely generate capillary action. It is preferable to form the groove with a groove width of 0.01 to 0.6 mm.

FIGS. 10 and 11 show a seventh embodiment of the present invention, in which groove-shaped recesses 17 for holding a brazing paste for holding a paste brazing material are provided on both sides of a fitting end of a plate 16. It is provided. The brazing groove 17 is formed on a side surface of a portion to be inserted into a fitting recess formed in a member to be joined.

FIG. 12 shows an eighth embodiment of the present invention, in which a fitting end of a plate member 18 has a groove-shaped recess 19a for opening the end face, and a corner portion of the fitting end. And a recess 19b for a brazing pool having a notch. A wire brazing material is mainly placed in the groove 19a for brazing, and a paste brazing material is mainly placed in the recess 19b for brazing.

As described in the above embodiments, the fitting end of the member inserted into the fitting recess is provided with a recess for a brazing reservoir having an appropriate shape according to the type of the brazing material to be used. By placing a predetermined amount of brazing material in the concave portion and brazing and joining, a sound joining state with high dimensional accuracy can be obtained, and a good joint portion with a small amount of wax oozing can be obtained.

[0021]

As described above, according to the brazing structure of the present invention, by controlling the amount of the brazing material to be filled in the recess for brazing, the amount of the exuded brazing after brazing is controlled. And a sound joining state with high dimensional accuracy can be obtained. In addition, by providing the thin tube portion or the slit, the amount of the exuded wax can be more reliably controlled. Thereby, the surface treatment after brazing can be performed reliably.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing a first embodiment of the present invention.

FIG. 2 is a partially sectional front view showing an example of a fixing jig.

FIG. 3 is a sectional front view showing a second embodiment of the present invention.

FIG. 4 is a partial cross-sectional front view showing a third embodiment of the present invention.

FIG. 5 is a partially sectional front view showing a fourth embodiment of the present invention.

FIG. 6 is a partial sectional front view showing a fifth embodiment of the present invention.

FIG. 7 is a bottom view of the same.

FIG. 8 is a partially sectional front view showing a sixth embodiment of the present invention.

FIG. 9 is a sectional side view of the same.

FIG. 10 is a front view showing a seventh embodiment of the present invention.

FIG. 11 is a sectional side view of the same.

FIG. 12 is a sectional side view showing an eighth embodiment of the present invention.

[Explanation of symbols]

1,11,12,16,18 ... plate-like member (plate material),
2, 7: round bar-shaped member (bar material), 3, 13: fitting recess,
4, 8, 14, 17, 19a, 19b: concave portion for brazing, 5: fixing jig, 6: thin tube portion, 15: slit

Claims (3)

[Claims] In a brazing structure for performing brazing by inserting a fitting end of another member into a fitting recess provided in one member, a predetermined amount of the fitting end of the insertion-side member is provided. A brazing structure, characterized in that a brazing recess for holding a brazing material is provided. 2. A brazing structure according to claim 1, wherein at least one of the brazing portions of the two members is provided with a thin tube portion or a slit into which the molten braze can flow by capillary action. 3. The brazing structure according to claim 2, wherein the diameter or width of the narrow tube portion or the slit is 0.01 to 0.6 mm.