JPH11197827A - Brazing jig for metallic structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hardly develop the deformation and the warping caused by thermal expansion in a brazing jig body part, to stably manufacture a metallic structural body in high precision without needing the coating technique, to easily execute the quality control of the jig and to extend the service life of the jig. SOLUTION: A ceramic-made main body part 25 is constituted of plural sets of assemblies 29 (29a-29e) of a base board 26, center plate 27 laid on this base board and two side plates 28 (28a, 28b) as one set. Sections 30 (30a-30e) for forming each metallic structural body by brazing on the upper surface of this center plate 27 are arranged at plural positions. In a part of each section 30 (30a-30e), a thin metal plate laying part is arranged, and at both sides, thick metal plate laying parts are arranged, and at the both sides of these metal plate laying parts, projecting parts for positioning the ceramic member, are arranged. Further, the surface having the same height as the upper surface of the thin metal plate laying part, is arranged at a part of the upper surface of each plate 28 (28a, 28b) corresponding to each section 30 (30a-30e) of the center plate 27, and projecting parts for positioning the ceramic member and a weight are arranged at both sides of this surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a brazing jig for forming a metal structure by brazing a plurality of metal plates to one surface of a ceramic member and providing a step between metal plates having different thicknesses.

[0002]

2. Description of the Related Art Conventionally, a metal structure 1 as shown in FIG. 14 has been used as an electron gun cathode structure used for a display for a computer or the like. The metal structure 1 has a through-hole 2 in the center, and a small through-hole 4 in the center of the surface of one side of a ceramic disk 3 having a brazing material attached to predetermined positions on both sides thereof. A thin metal plate 5 is arranged, and a thick metal plate 6 is provided on both sides of the thin metal plate 5.
(6a, 6b), and the ceramic disk 3
On the other surface side, the vicinity of one end 7 is fitted into the disk through hole 2, the flange portion 8 is brought into contact with the other surface, and the center line is aligned with the center through hole 4 of the thin metal plate 5. A metal sleeve holder 9 with a flange portion is arranged, and three metal plates 5, 6 and a flange portion 8 of the sleeve holder 9 are brazed to the ceramic disk 3 so that the metal plates 5, 6 having different thicknesses are interposed. Is provided with a step A.

The ceramic disk 3 is an insulating spacer, the central through hole 4 is an electron emission hole, the thin metal plate 5 is a first grid, the thick metal plate 6 is a conductive spacer, the cathode 7 is near one end 7, and the thickness. Steps A between the metal plates 5, 6 correspond to the distance between the first grid 5 and the second grid (not shown). 10 is the first grid 5
Reference numeral 101 denotes a terminal of the sleeve holder 9.

In order to obtain the step A between the metal plates 5 and 6 having different thicknesses of the metal structure 1 with high accuracy, Japanese Patent Application Laid-Open No.
No. 25678 discloses a metal brazing jig 13 composed of a brazing jig main body 11 and a weight 12 as shown in FIG.
Is presented. The brazing jig body 11 includes first, second, third, and fourth jig members 14, 15, 16, 1.
7 and the like, the block-shaped first jig member 14 has a thin metal plate mounting portion 18 on the upper surface and a thin metal plate 5 on the center thereof at the center thereof, and both sides of the thin metal plate mounting portion 18. Metal plate mounting portion 19 (19a, 1a) on which the thick metal plate 6 is mounted
9b). By providing a step A between the upper surface of the thin metal plate receiver 18 and the upper surface of the thick metal plate receiver 19, the step A is formed with high precision between the metal plates 5 and 6 having different thicknesses. I have.

The first jig member 14, the two thick metal plates 6 placed thereon, and the ceramic disk 3 placed thereon are guided and positioned by a plate-shaped second jig member 15 for guiding.
It is. The first jig member 14 is provided for each of a number of metal structure brazing sections provided on the second jig member 15.
It is fitted into a through hole provided there. The third jig member is a plate-shaped third jig member which guides the weight 12 placed on the ceramic disk 3 or the like so as not to rotate, and fits and positions the central projection 20 projecting downward from the center thereof into the inside of the sleeve holder 9. Sixteen. The detent protrusion 21 of the weight 12 fits into a through hole of each section provided in the third jig member 16.

The first, second, and third jig members 1
The plate-shaped fourth jig member 17 is in contact with the substrate on which the substrates 4, 15 and 16 are placed. Then, the stacked second, third, and fourth jig members 15, 16, 17 and the like are integrally joined by, for example, bolting at a number of places. Reference numeral 22 denotes a center pin for inserting the center through hole 4 of the thin metal plate 5 and guiding the center projection 20 of the weight 12, such as a screw 23 inserted from the lower surface of the fourth jig member 17. It is positioned by the fixing means. Reference numeral 24 denotes a detent projection 21 of the weight 12.
And a hole for accommodating the sleeve holder 9 formed between the sleeve holder 9 and the central portion 20.

[0007]

The brazing jig body 11 uses stainless steel or the like as a metal, but has a problem. This is because, when the brazing jig 13 is placed in a furnace and heated to 800 to 1000 ° C., the metal has a large thermal expansion, so that the brazing jig body 11 is liable to be deformed or warped. This is because it is difficult to increase the precision of the data. or,
When silver brazing (alloy of silver, copper, and nickel) or the like is used as the brazing material, the brazing material adheres to the brazing jig main body 11, and the main body 11 is coated with titanium nitride. Insufficient, it is necessary to establish coating technology.

The present invention has been made in view of such conventional problems, and the brazing jig, particularly its main body, is unlikely to be deformed or warped due to thermal expansion, and does not require a coating technique. It is an object of the present invention to provide a brazing jig for a metal structure that can stably produce a metal structure with high precision, facilitates quality control of the jig, and has a long tool life.

[0009]

In order to achieve the above object, a brazing jig for a metal structure according to the present invention has a thin metal plate disposed on one surface of a ceramic member and a part of the surface. Place a thick metal plate on one or both sides of a thin metal plate, braze those metal plates to a ceramic member,
It comprises a brazing jig body for forming a metal structure by providing a step between metal plates having different thicknesses, and a weight placed on a member constituting the metal structure during brazing.

The brazing jig body is made of ceramic, the brazing jig body is a substrate, a center plate placed on the substrate, and two side plates arranged side by side on both sides of the center plate. And one or a plurality of sets of brazing plate assemblies, wherein a plurality of sections for brazing each metal structure on the upper surface of each center plate are formed along the longitudinal direction of the center plate. A thin metal plate mounting part is provided in a part of each brazing section, and a thick metal plate mounting part is provided on one side or both sides of the thin metal plate mounting part. Positioning projections for determining the position of the ceramic member are provided on both sides of the part, and the upper surface of each side plate is provided with a corresponding part corresponding to each brazing section of the center plate. Each Deployment, a portion thereof is provided a height approximately equal to the surface as a thin metal plate mounting the upper surface of the portion, provided with a ceramic member and a weight positioning protrusion for positioning the ceramic member and the weight on both sides of the face respectively.

[0011] Further, the substrate is placed on one or more sets of brazing plate assemblies, and two bases with side walls enclosing the opposing two directions from the side, respectively; Or a side receiving plate enclosing a rectangular shape by combining two other directions of a plurality of sets of brazing plate assemblies with two side walls;
It is preferable that the side receiving spring is configured to be detachable from the base, and that one or more sets of brazing plate assemblies are pressed against the side receiving plate by the side receiving spring.

The weight is composed of a metal weight main body, and a ceramic weight pin that is fitted in a pin installation hole provided at the center of the weight main body and protrudes a tip portion, and the weight is formed by a flange portion. Is placed on a metal sleeve holder having a flange portion which comes into contact with the other surface of the ceramic member, the weight pin is fitted inside the sleeve holder, and the flange portion is brazed to the other surface of the ceramic member.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of a main body of a brazing jig for an electron gun cathode structure to which the present invention is applied, and FIG. 2 is a view showing a set of a brazing plate assembly mounted on a substrate of the main body of the brazing jig. FIG. 3 is a side view of the center plate. The brazing jig main body 25 is entirely made of ceramic, and includes a substrate 26, a center plate 27 mounted on the substrate 26, and two side plates 28 (28a, 28b) arranged side by side on both sides of the center plate 27. , One set, for example, five sets of brazing plate assemblies 29 (29a,... 29e). The ceramic material does not require a coating technique because the brazing material does not adhere to the ceramic, and since the ceramic has a small coefficient of thermal expansion, it is unlikely to be deformed or warped due to thermal expansion, and the dimensional correction value is minimized. This is suitable for placing a ceramic disk. In addition, the life of the brazing jig body 25 is prolonged.

A section 30 is formed on each center plate 27 by brazing each metal structure on its upper surface.
Are provided at a plurality of positions along the longitudinal direction of the center plate 27, for example, at five positions, and the brazing sections 30 (3
0a,... 30e), a thin metal plate mounting portion 31
(31a,... 31e) are provided. Also, for each brazing section 30, short protruding portions 32 (32a, 32b) for separating the thin metal plate and the thick metal plate are provided on both sides of the thin metal plate mounting portion 31. A thick metal plate mounting portion 33 (33a, 3a,
3b), and positioning projections 3 for determining the position of the ceramic disk outside both thick metal plate mounting portions 33.
4 (34a, 34b) are provided.

In each brazing section 30, a pin mounting hole 35 is provided at the center of the thin metal plate mounting portion 31, and a center pin 36 is provided at each pin mounting hole 35 (35a,... 35e) at the upper end. The parts are set so that they protrude from the upper surface. Each of the center pins 36 (36
a,... 36e) are concentric tubular holders 37 (37e).
a,... 37e) are housed except for the upper end, respectively, and inserted into the installation holes 35 together with the cylindrical holder 37 to be installed.

Further, as shown in FIG.
8 has a section 38 (38) corresponding to each brazing section 30 of the center plate 27 on the upper surface thereof.
a,... 38e), a surface 39 having a height slightly lower than the upper surface of the thin metal plate mounting portion 31 is provided at the center thereof, and ceramic discs are provided on both sides of the center surface 39 (39a,. And a ceramic disk / weight positioning projection 40 (40a, 40b) for positioning the weight. As described above, each of the brazing plate assemblies 29
2 are arranged side by side on the center plate 27 and on both sides thereof.
Each plate is divided into two side plates 28
This is to improve the processing accuracy by simply processing a simple shape such as a straight line or a circle for each 7, 28, and avoiding difficulties in processing hard and brittle ceramic materials.

The board 26 on which the five sets of brazing plate assemblies 29 are mounted has two side walls 41 (4) which respectively surround the two opposite directions of the assemblies 29 from the side.
1a, 41b) Side receiving plate 43 (43a, 43a) which surrounds the mounting base portion 42 and the other two directions of the five brazing plate assemblies 29 in combination with the two side walls 41.
b), and a side receiving spring 44. It is preferable to use silicon nitride (Si ₃ N ₄ ) for the base 42 with the two side walls 41, the side receiving plate 43, and the side receiving spring 44. The pedestal portion 42 is formed in a rectangular plate as shown in FIG. 5, and each side wall 41 is protruded at a predetermined height along two edges on the upper surface. In addition, concave portions 45 (45a, 45b), 46 (46) for assembling in a cross-girder shape by fitting both end portions of the elongated side receiving plate 43 near both end portions of each side wall 41.
a, 46b) are provided. Then, both side receiving plates 43 can be freely detached from the two side walls 41, respectively, and can be attached to and detached from the base 42. FIG.
Is a side view of the front side of the base 42 with the two side walls 41, and FIG. 7 is a left side view.

The side receiving spring 44 has projections 47, 4 projecting in opposite directions at the center and both ends as shown in FIG.
8 (48a, 48b) is used. Then, the side receiving spring 44 is disposed inside one of the side receiving plates, for example, 43a, with the central projection 47 facing outward, for example, and the both-ends projecting 48 inward, and the side receiving spring 44 moves The set of brazing plate assemblies 29 can be pressed against the other side receiving plate 43b. Therefore, the center plates 27, the side plates 28, etc., contact without any play on the pedestal 42, and each of the five sets of brazing plate assemblies 29 can be positioned. The part 25 is completed. Note that FIG.
When the side receiving spring 49 is used as shown in (1), the side receiving spring 49 need only be used instead of the side receiving plate 43b. However, the central projection 50 of the side receiving spring 49
To face inward.

A weight 51 having a longitudinal sectional shape as shown in FIG. 10 is provided at each place where the electron gun cathode structure is brazed to the brazing jig main body 25. The weight 51 is made of a metal weight main body 52.
And a ceramic weight pin 54 that fits into a pin installation hole 53 provided to penetrate the center of the weight body 52 vertically and protrudes the tip. The weight main body 52 is formed of a large-diameter cylindrical portion 55 and a rectangular parallelepiped detent protrusion 56 projecting downward from the lower center portion thereof, and a pin is provided at the central portion of the detent projection 56. A sleeve holder storage hole 57 having a large diameter communicating with the hole 53 and reaching the inside of the cylindrical portion 55 is provided. However, the weight body 5
2 forms a ceramic on the entire surface including the pin installation hole 53 and the sleeve holder storage hole 57 by heat treatment. The weight pin 54 is formed in an elongated cylindrical shape having a tapered tip, and is disposed concentrically in the weight main body 52. The weight main body 52 is made of metal having a small coefficient of thermal expansion, but is made of metal in order to obtain a necessary load by making it heavy, and the weight pin 54 made of ceramic is used for the sleeve holder. This is for improving the accuracy of the center of the weight 51 to be fitted.

When brazing the electron gun cathode structure at each of the 25 brazing locations provided on the brazing jig body 25 at the time of brazing, the necessary components for each brazing location are automated. Alternatively, they are manually arranged at predetermined locations. At this time, as shown in FIG. 11, a small center hole is first provided in each center section 31 of the center plate 27, and a terminal 58 is provided at the edge.
A thin metal plate 59 having a rectangular shape provided thereon is placed, and is positioned so that the upper end of the center pin 36 fits into the center hole thereof and projects upward. Note that the terminal 58 is disposed on the central surface 39 of the one side plate 28. Also, the rectangular thick metal plates 60 (60a, 6a) are placed on the mounting portions 33 on both sides.
0b).

A through-hole is provided at the center of the metal plates 59 and 60, and a substantially rectangular ceramic disk 61 having opposing end surfaces formed on an arc-shaped surface is placed thereon. Positioning is performed by the part 34.
The ceramic disk 61 is provided on both side plates 28.
Positioning is also performed by the protrusions 40 on both sides of each central surface 39. Further, a metal sleeve holder 63 with a flange portion 62 is placed on the ceramic disk 61,
The flange 62 is brought into contact with the upper surface of the ceramic disk 61, and the vicinity of one end of the sleeve holder 63 is fitted into the center hole of the ceramic disk 61 for positioning. The flange portion 62 is formed in a similar shape slightly smaller than the upper surface shape of the ceramic disk 61, and a part thereof is bent to be a terminal.

After the necessary constituent members 59 to 63 are assembled in the respective brazing portions of the brazing jig main body 25 in this way, the weights 51 are placed on them as shown in FIG. Place each with 56 down. At this time, the distal end of the weight pin 54 is fitted in the sleeve holder 63, and the positioning is performed so that the upper end of the center pin 36 fits in the distal end. Further, the detent protrusion 56 of the weight 51 is fitted between the positioning protrusions 40 provided on both side plates 28 as shown in FIG. Then, a required load is applied to the constituent members 59 to 63 by the weight 51, and between the thin metal plate 59 at the center and the thick metal plates 60 on both sides thereof, the metal plate mounting portions 31 and 33 are placed. Step B between upper surfaces
Can be accurately formed as it is.

Then, the brazing jig is put into a furnace, the flange 62 of the sleeve holder 63 is brazed to the upper surface of the ceramic disk 61, and the thin metal plate 59 and both thick metal plates 60 are brazed to the lower surface. I do. At this time, the brazing jig main body 25 is entirely made of ceramic, and
Since the first pin 54 is made of ceramic, it is unlikely to be deformed or warped due to thermal expansion. Then, a step formed between the metal plates 59 and 60 having different thicknesses can be maintained with high precision as it is, and the ceramic disk 61
Can be brazed to the sleeve holder 63 with high precision. Therefore, the electron gun cathode structure 1 shown in FIG.
Products with the same structure as above can be stably produced with higher precision.

When a part of the main body 25, for example, a part of the center plate 27, the side plate 28, or the like is damaged during use of the brazing jig, the side receiving spring 44 is freely movable with respect to the base 42. The center plate 27, the side plate 28, and the like can be removed and replaced as needed because the structure is such that the center plate 27 and the side plates 28 can be attached and detached. Therefore, quality control of the brazing jig can be easily performed.

[0025]

According to the present invention described above, claim 1
In the described invention, since the brazing jig main body is made of ceramic, the brazing material does not adhere to the jig and does not require a coating technique. Ceramic has a small coefficient of thermal expansion, so that the jig is unlikely to be deformed or warped due to thermal expansion. In addition, the life is long. Therefore, the metal structure can be made into a high-precision product, and stable production is also possible. Also, one or more sets of brazing plates, each of which is a set of a brazing jig main body, a center plate placed on the substrate, and two side plates arranged side by side on both sides of the center plate. When the brazing jig is partially broken during use, it is possible to replace only the member corresponding to the damaged portion, and the quality control of the brazing jig is facilitated.

According to the second aspect of the present invention, each center plate is provided so that one or a plurality of sets of brazing plate assemblies can be attached to and detached from the base by pressing the side receiving springs against the side receiving plates. If the side plates are damaged, simply remove the pressing force applied to them and remove them.
It can be replaced with an undamaged one. Therefore,
Quality control of the brazing jig can be performed more easily.

According to the third aspect of the present invention, since the weight pin provided at the center of the weight main body is made of ceramic, the sleeve holder can be positioned by the weight pin and brazed to the ceramic member with high precision.

[Brief description of the drawings]

FIG. 1 is a plan view of a main body of a brazing jig for an electron gun cathode structure to which the present invention is applied.

FIG. 2 is a plan view of a center plate constituting a set of brazing plate assemblies mounted on a substrate of the brazing jig main body.

FIG. 3 is a side view of the center plate.

FIG. 4 is a side view of a side plate constituting the brazing plate assembly.

FIG. 5 is a plan view of a base portion with two side walls constituting the same substrate.

FIG. 6 is a front view of the pedestal portion with the second side wall.

FIG. 7 is a side view of the pedestal portion with the second side wall.

FIG. 8 is a plan view of a side receiving spring constituting the substrate.

FIG. 9 is a plan view of another side receiving spring constituting the substrate.

FIG. 10 is a longitudinal sectional view of a weight constituting the brazing jig.

FIG. 11 is a plan view showing a state where the components for the electron gun cathode structure are assembled at one brazing portion of the brazing jig main body.

FIG. 12 is a vertical sectional view showing a state where a weight is placed on a constituent member for the electron gun cathode structure, corresponding to a position taken along line XX in FIG. 11;

FIG. 13 is a vertical sectional view showing a state where a weight is placed on a component for the electron gun cathode structure, corresponding to the position of line YY in FIG. 11;

FIG. 14 is a partial longitudinal sectional view of the electron gun cathode structure as viewed from the front side.

FIG. 15 is a longitudinal sectional view showing a state where a weight is placed on a component for an electron gun cathode structure using a conventional brazing jig.

[Explanation of symbols]

25 Brazing jig main body 26 Board 27 Center plate 28 Side plate 29 Brazing plate assembly 30 Brazing section 31 Thin metal plate mounting portion 32 Separating projection 33 Thick Metal plate mounting parts 34, 40 ... Positioning projections 35, 53 ... Pin installation holes 36 ... Center pins 37 ... Cylindrical holder
39 ... Central surface 41 ... Side wall 42 ... Stand 43 ... Side receiving plate 44,49 ... Side receiving spring 45,46 ... Recess 51 ... Weight 52 ... Weight main body 54 ... Weight pin 5
5 ... Cylindrical part 56 ... Detent protrusion 57 ... Sleeve holder storage hole 59 ... Thin metal plate 60 ... Thick metal plate 6
DESCRIPTION OF SYMBOLS 1 ... Ceramic disk 62 ... Flange part 63 ... Sleeve holder B ... Step

Claims (3)

[Claims] 1. A thin metal plate is disposed on one side of a ceramic member, and a thick metal plate is disposed on one or both sides of the thin metal plate. A brazing jig comprising: a brazing jig body for forming a metal structure by providing a step between metal plates having different thicknesses; and a weight placed on a member constituting the metal structure during brazing. In the above, the brazing jig body is made of ceramic, the brazing jig body is a substrate,
One or a plurality of brazing plate assemblies each including a center plate mounted on the substrate and two side plates arranged side by side on the center plate. A plurality of sections for brazing each metal structure are formed on the upper surface along the longitudinal direction of the center plate, and a thin metal plate mounting portion is provided in a part of each brazing section. A thick metal plate mounting part is provided on one side or both sides of the part, positioning projections for determining the position of the ceramic member are provided on both sides of the metal plate mounting part, and a center plate is provided on the upper surface of each side plate. Corresponding to each brazing section, for each section, a surface with a height almost equal to the upper surface of the thin metal plate mounting part is provided in a part, and ceramics are provided on both sides of the surface. Brazing fixture of the metal structure, characterized by providing a ceramic member and a weight positioning protrusion for positioning the click member and the weight, respectively. 2. A board having one or more sets of brazing plate assemblies mounted thereon, and two sets of side wall-mounted bases which respectively enclose two opposing directions from the side, The other two directions of the plural sets of brazing plate assemblies are
Composed of a side receiving plate and a side receiving spring that surround in a rectangular shape in combination with the side wall, and the side receiving spring is detachably attached to the base portion, and one or more sets of brazing plates are set by the side receiving spring. The jig for brazing a metal structure according to claim 1, wherein the assembly is pressed against a side receiving plate. 3. A weight is composed of a metal weight main body and a ceramic weight pin which is fitted in a pin installation hole provided at the center of the weight main body and protrudes a tip portion. The metal member holder having a flange portion which comes into contact with the other surface of the ceramic member, the weight pin is fitted inside the sleeve holder, and the flange portion is brazed to the other surface of the ceramic member. 3. A jig for brazing a metal structure according to claim 1 or 2.