JP5914950B2 - Brazed joint parts - Google Patents

Description

  The present invention relates to a brazed joint component. More specifically, the present invention relates to a brazed joint part in which two parts paired are joined by a brazing material.

  Machine parts with complex structures, such as planetary gear mechanisms (planetary carriers) for automatic transmissions of automobiles, are manufactured by using sintered materials for each member or part that constitutes the machine part. Is mainly performed by brazing (see, for example, Patent Documents 1 and 2).

  The brazing material used for brazing is disposed in a vertical hole or a horizontal hole formed in one member to be joined, and the brazing material melted by heating spreads uniformly on the joining surface of both members, so that Joining is performed.

  For example, as shown in FIG. 4, a member in which three column portions 21 are erected at equal intervals on the periphery of one surface 20 a of a circular plate body 20 and a member made of a circular plate body 23 are joined. In this case, a brazing material is disposed in the vertical hole 24 of the plate body 23 formed at a position corresponding to the tip end surface 21a of the column portion 21 serving as a joining surface.

  The both members are obtained by supplying iron-based metal powder into a mold and press-molding with a punch. At that time, if a burr comes out from the tip surface 21a of the column part 21, both members are obtained. Prior to joining, the tip 21a of the column 21 and the corresponding surface (the lower surface in FIG. 4) of the plate body 23 may be lifted up. Further, when the tip surface shape is such that burrs appear (a shape in which the angle formed by the edge of the tip surface 21a of the column part and the edges of the side surfaces 21b to 21d is a right angle), the member including the plate body 20 and the column part 21 The end face of the punch for molding is easily damaged. Therefore, conventionally, as shown in FIG. 5, a chamfered portion 25 is formed on the periphery of the tip end surface 21 a of the column portion 21. As shown in FIG. 6, the chamfered portion 25 is composed of a stepped portion composed of an inclined surface 26 and a flat surface 27, and the shape of a corresponding portion of a mold used when pressing metal powder. Can be formed by stepping.

JP 2003-251457 A JP 2008-290105 A

  However, when the groove portion 28 for component insertion is formed on the outer peripheral side surface 21 b of the column portion 21, a part of the molten brazing material gathered in the chamfered portion 25 due to capillary action is caused by the corner portion 28 a of the groove portion 28. It may overflow from the inside and flow downward in the groove 28 due to its own weight.

  When the brazing material is hardened in the groove portion 28, depending on the position and amount of the brazing material, an assembling operation for inserting a predetermined part into the groove portion 28 cannot be performed, so that the obtained joined part becomes a defective product and can be used. Can not.

  The present invention has been made in view of such circumstances, and in a joined part using a member in which a groove portion is formed on the side surface on the outer peripheral side of the column portion, the molten brazing material is prevented from flowing into the groove portion. It is an object of the present invention to provide a brazed joint component that can be made.

(1) brazing component of the present invention includes a plate body, a first member comprising a pillar portion having a groove, and a second member made of a plate member, said pillar portion is standing on one side of the plate body are set, the grooves are formed along the longitudinal direction on the side surface of the pillar portion, the pillar portion distal end face is brazed parts ing joined by brazing material on one surface of the second member Because
Of the peripheral edge of the front end surface of the column portion, there is a chamfered portion at a peripheral edge other than a portion desired for the groove part in order to prevent the molten brazing material from collecting at the edge part of the groove part.

In the brazed joint component according to the present invention, since the chamfered portion is not formed in the portion of the peripheral edge of the tip surface of the column portion that is desired for the groove portion, it is possible to prevent the molten brazing material from collecting on the edge portion of the groove portion. It is possible to prevent the molten brazing material from flowing into the groove. As a result, it is possible to insert a predetermined part into the groove, thereby eliminating the occurrence of defective products as in the prior art and improving the product yield.
In addition, since it is possible to prevent the molten brazing material from flowing into the groove, the molten brazing material can be widely supplied to the joint surface that should be spread over. Thereby, the joint strength of a joining component can be improved.

(2) In the brazing part of the (1), wherein the first member has a plurality of column portions, the plurality of pillar portions are erected on the periphery of the circular plate member, said groove there may be a shaped groove of a substantially U on the side of the outer peripheral side of the pillar portion.

(3) In the brazing part of the (1) or (2), wherein the chamfered portion is a stepped portion, the stepped portion may be Tei formed on the periphery of the distal end surface.

  According to the brazing material joining component of the present invention, in the joining component using a member in which a groove portion is formed on the side surface on the outer peripheral side of the column portion, it is possible to prevent the molten brazing material from flowing into the groove portion.

It is a disassembled perspective view before joining of one embodiment of a brazing joint part of the present invention. It is a plane explanatory view of the tip end face of the pillar part in the brazing joint component shown in FIG. It is side surface explanatory drawing of the brazing joining component shown by FIG. It is a disassembled perspective view before joining of the conventional brazing joining component. It is a plane explanatory view of the tip end face of the column part in the brazing joint component shown in FIG. It is II sectional view explanatory drawing of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a brazing material joining component according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a brazed joint component 1 according to an embodiment of the present invention before joining, and FIG. 2 is a plan view of a front end surface of a pillar portion in the brazed joint component 1 shown in FIG. FIG. 3 is an explanatory view, and FIG. 3 is an explanatory side view after joining the brazed joint component 1.

  The brazed joint component 1 includes a first member in which a pillar portion 3 is erected on the peripheral edge of one side 2 a of a circular plate body 2, and a second member made of a circular plate body 4.

  The first member and the second member are both molded bodies obtained by, for example, feeding Fe-2% Cu-0.8% C iron-based metal powder into a mold and press-molding with a punch. It is sintered together when the brazing material is heated and melted. In addition, the 1st member and the 2nd member can also be made into the sintered compact which was sintered beforehand before joining with a brazing material.

  The plate body 2 has a circular central opening 5. Three column portions 3 are erected at equal intervals along the periphery of the upper surface (the upper surface in FIG. 1) 2 a of the plate body 2, and the side surfaces 3 b on the outer peripheral side are the outer peripheral surfaces 2 b of the plate body 2. And is flush. Further, a groove 6 extending along the longitudinal direction of the pillar 3 is formed on the side surface 3 b on the outer peripheral side of each pillar 3. A cutout 7 that communicates with the groove 6 is formed on the outer peripheral surface 2 b of the plate body 2. The size of the groove portion 6 may be appropriately selected according to the size of the parts disposed in the groove portion 6 and is not particularly limited in the present invention. Usually, both the width w and the depth d are about several millimeters. It is.

  The cross-sectional shape of the groove 6 in the present embodiment is substantially U-shaped. As shown in FIGS. 1 and 2, the groove 6 is formed not at the center in the circumferential direction of the side surface 3 b of the pillar 6 but at a position biased to one side.

  The plate body 4 is disposed on the front end surface 3a of the column portion 3 so as to face the plate body 2 of the first member. The plate body 4 also has a circular central opening 8, and at the time of joining, the central opening 8 and the central opening 5 of the plate body 2 are concentric. In addition, a brazing material (not shown) is disposed on the distal end surface 3a at the peripheral portion of the plate body 4 in a state where the plate body 4 is disposed on the distal end surface 3a of the column portion 3. The vertical hole 9 is formed. Three vertical holes 9 are formed at equal intervals along the peripheral edge of the plate body 4 corresponding to the position of the front end surface 3 a of the column portion 3. In addition, as a brazing material, what consists of a green compact which has a composition of a Ni-Cu-Mn-Fe type | system | group, for example, and exhibits a short cylinder shape can be used.

  A chamfered portion 10 having a stepped portion similar to that shown in FIG. 6 is formed on the periphery of the tip surface 3a of the column portion 3, but in this embodiment, a groove portion is included in the periphery of the tip surface 3a. The chamfered portion 10 is formed only at the peripheral edge other than the portion desired for 6. Since the chamfered portion is not formed in the peripheral portion 11 desired for the groove portion 6, it is possible to suppress the brazing material melted by heating from collecting in the peripheral portion 11, and as a result, as in the conventional brazed joint component It is possible to prevent the molten brazing material from overflowing into the groove. Thereby, it is possible to insert a predetermined part into the groove 6, thereby eliminating the occurrence of defective products as in the prior art and improving the yield of products. Moreover, since it is possible to prevent the molten brazing material from flowing into the groove portion 6, the molten brazing material can be widely supplied to the joint surface that should be spread over. As a result, the bonding strength of the bonded component can be improved.

  The chamfered portion 10 can be formed by stepping the shape of the corresponding part of the mold used when pressing the metal powder. In addition, although the burr | flash of the past arises in the peripheral part 11 desired in the groove part 6 which does not form a chamfer part, such a burr | flash removes by carrying out the brushing process of the front end surface 3a of the pillar part 3, for example after press molding. Can do.

[Other variations]
It should be noted that the embodiment disclosed this time is merely an example in all respects and is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  For example, in the above-described embodiment, the cross-sectional shape of the groove portion formed on the outer peripheral side surface of the column portion is substantially U-shaped, but the cross-sectional shape of the groove portion is another shape such as a triangle or a semicircle. May be. Moreover, although the position of the groove is biased from the center to one side, it may be near the center.

  In the above-described embodiment, a stepped portion such as an inclined surface and a flat surface is adopted as the chamfered portion, but a chamfered portion made of a simple inclined surface or a chamfered portion made of a curved surface may be used.

  Further, in the above-described embodiment, two perforated circular plates are connected by three pillars as brazed joint parts, but this is merely an example, and is described in the claims. In addition, as long as the conditions of the first member and the second member are satisfied, a brazed joint part having an appropriate form can be obtained according to the use, purpose, and the like.

  In the above-described embodiment, a vertical hole is used as a space for accommodating the brazing material, but a space having another shape such as a rectangular recess may be used.

1 Brazed joint part 2 Plate body 2a Upper surface (single side)
3 Column portion 3a Tip surface 3b Side surface on the outer peripheral side 4 Plate body 6 Groove portion 10 Chamfered portion

Claims (3)

A plate body, a first member comprising a pillar portion having a groove, and a second member made of a plate member, said pillar portion is erected on one side of the plate member, said groove of said pillar portion are formed along the longitudinal direction on the side surfaces, the distal end surface of the pillar portion is a brazing parts ing joined by brazing material on one surface of the second member,
Brazing, characterized in that there is a chamfered portion at the periphery other than the portion desired for the groove portion in order to suppress the molten brazing material from gathering at the edge portion of the groove portion among the periphery of the front end surface of the pillar portion. Joined parts. The first member has a plurality of column portions, the plurality of pillar portions are erected on the periphery of the circular plate member, the groove is a substantially on the side of the outer peripheral side of the pillar portion The brazed joint according to claim 1, wherein the brazed joint is a U-shaped groove. The chamfered portion is a stepped portion, the stepped portion brazed component according to claim 1 or 2 is formed on the periphery of the distal end surface.

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