JPH0499297A - Production of joined body of electrocast parts and metallic parts - Google Patents

Abstract

PURPOSE:To obtain the joined body of electrocast parts and metallic parts having high reliability by completely filling the spacing between the mating surfaces of metallic parts and a core with an adhesive and forming a conductive metallic film on the outside surface part of this adhesive. CONSTITUTION:The slight spacing 8 is completely filled and an integral base metal is constituted by adhering the mating surfaces of the metallic parts 1, 2 and the core 3 are adhered with the adhesive. After this core 3 is cut to a required shape, the conductive metallic film 14a is forme by vacuum vapor deposition, ion plating or electroless plating on the surface of this base metal. Electrocasting is executed with this base metal as the cathode. The spacing 8 of the above-mentioned mating surfaces is completely sealed by the adhesive and the surface of the adhesive is provided with an electrical conductivity by the conductive metallic film 14a and, therefore, the continuous plating layer is deposited on the surface of the base metal even in the parts corresponding to the outside edges of the mating parts. The electrocast parts having no pinholes in the joint parts with the metallic parts are obtd. by dissolving the core 3 after the completion of this plating.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electroformed part obtained by an electroforming method in which a mold is electroplated and then the mold is dissolved and removed to leave a plating film.
The present invention relates to a method for manufacturing a joined body with other metal parts.

[Prior Art J] For example, an electrodeposited bellows 101 as shown in FIG. 6 is known as a joined body of an electroformed part and a metal part.

Conventionally, this electrodeposited bellows 101 has an electrodeposited bellows main body 1.
02 is formed by an electroforming method, and both ends 102a, 10
2b is hermetically bonded to the metal parts 103 and 104 by adhesion with a resin material or solder, or by welding with an electron beam or laser beam.

However, those bonded with a resin material have problems with the airtightness and heat resistance of the bonded part, and the electroplated bellows body 102 has a very thin wall thickness of about several tens to several hundred micrometers, so this It is difficult to hold the electrodeposited bellows body 102 so as not to deform it, and furthermore,
Bonding with solder places a high load on both ends 103a and 102b, and welding with an electron beam or the like has the problem of high costs.

[Problem to be solved by the invention]

Therefore, the molding of electroformed parts such as the electrodeposited bellows body, etc.
The method of simultaneously joining the electroformed part and the metal part, that is, as shown in FIG. By applying electricity in a metal electrolyte as a cathode, an electroformed part a, which is a plating film, is deposited on the surface of the integral part of the metal part and core C, and then the core C is dissolved and removed in a solvent. Research has been conducted on a method of obtaining a joined body of an electroformed part a and a metal part C by doing this, but the most problematic aspect of this method is the mating surface d of the metal part and the core C.

In other words, if this mating surface d does not come into perfect contact with the outer periphery and there is a partial gap, a plating layer will not be formed in that area (in fact, the precision of machining On the other hand, it is extremely difficult to make the mating surface d a perfect plane, so there is a high possibility that the gap will be formed.
As mentioned earlier, the film thickness of electroformed parts (plated film) is several 1.0 to several 100 μm when fishing on a boat.
Because the plate is so thin, the part corresponding to the gap cannot be completely covered with the plating film, resulting in pinholes and a defective product.

The present invention has been made in view of these points, and its object is to perfect the airtightness at the joint between an electroformed part and a metal part, and to prevent the occurrence of defects. .

[Means for Solving the Problems] In order to solve the above problems, a method for manufacturing a joined body of an electroformed part and a metal part according to the present invention provides a method for manufacturing a joined body of an electroformed part and a metal part to be joined with the electroformed part and a metal part to be removed after forming. A process of bonding the mating surfaces of the cores facing each other with an adhesive, and cutting the surface of the base metal consisting of the metal parts and the core integrated in this process to form the core into the required shape. The method comprises a step of processing into a shape, a step of forming a conductive metal film on the surface of the base metal, and a step of electroforming the base metal, the conductive metal film comprising: It can be formed by vacuum evaporation, ion plating, or electroless plating.

[For production]

According to the present invention, first, the mating surfaces of the metal component and the core are bonded together with an adhesive, thereby completely filling the minute gap between the mating surfaces and constructing an integrated base metal. and,
In the subsequent cutting process, the core is cut into the desired shape,
Furthermore, a conductive metal film is formed on the surface of this base metal by vacuum deposition, ion plating, or electroless plating, so that the surface of the non-conductive adhesive exposed from the outer edge of the mating surface is also conductive. After holding the base metal, electroforming is performed using this base metal as a cathode. At this time, the gap between the mating surfaces is completely sealed with the adhesive, and since the surface of this adhesive is conductive due to the conductive metal film, there is a portion of the alloy surface that corresponds to the outer edge of the mating surfaces. A continuous plating layer is deposited, and by melting the core after this plating is completed, an electroformed part without pinholes can be obtained at the joint with the metal part.

[Example] The present invention will be described below with reference to the example shown in FIGS. 1 to 5.

In each figure, numerals 1 and 2 are metal parts made of steel (SUS304), etc., which are to be joined with the electrodeposited bellows body 15, which is an electroformed part, and 3 is a core made of aluminum, etc., and these metal parts 1. 2 and the core 3 are shaped so that they can be fitted into each other in the axial direction. A mating surface 4, 5 is formed at the axially opposing ends of the metal part 1 and the core 3, and a mating surface 6,7 is formed at the axially opposing end of the metal part 2 and the core 3, respectively.

Figure 1 shows metal parts 1, 2 and core 3 with synthetic resin adhesive 8 applied to their mating surfaces 4.5 and 6.7, and then the mating surfaces 4, 5 and 6, 7 are This figure shows the state in which they are press-fitted to each other so as to be in close contact with each other via adhesive 8 to form an integral base metal 10, that is, the mating surfaces 4, 5, and 6
．． By completely filling the space between 7 and 7 with adhesive 8, generation of minute gaps is prevented.

A machining allowance 9 is set on the outer periphery of the base metal 10 (metal parts 1, 2 and core 3), as shown by the broken line in FIG. By cutting the steps at the outer peripheral surface of the base metal 10 bordering the mating surfaces 4.5 and 6, 7, the adhesive 8 is removed from between the mating surfaces 4, 5 and 6.7 to the outside. Remove the soil and
On the surface of the core 3, folds 11 are cut to form a bellows shape of an electrodeposited bellows body 15, which will be described later.

After the cutting is completed, a conductive metal film 12 is formed on the surface of the base metal 10, as shown in FIG. This is because the adhesive 8 interposed between the mating surfaces 4.5 and 6.7 is non-conductive, so by making the outer surface of the adhesive 8 conductive as well, it can be used during electroforming. The purpose is to deposit a continuous plating layer on the surface of the base metal 10 including the outer surface of the adhesive 8. This conductive metal film 12 can be formed by vacuum evaporation, ion plating, or electroless plating.

Next, electroforming is performed in a plating solution using the base metal 10 as a cathode. The metal parts 1.2 and the core 3 constituting the base metal 10 are conductors, and the outer edges between the mating surfaces 45 and 6 and 7 have no gaps (there are none) due to the interposition of the adhesive 8. Since the outer surface of the adhesive 8 has conductivity due to the conductive metal film 12, as shown in FIG.
A continuous thickening layer 14a is deposited on the surface of.

When the plating layer 14a reaches the required thickness, the core 3 is dissolved and removed using a solvent, and as shown in FIG. An electrodeposited bellows 13 is obtained as a joined body in which the electrodeposited bellows main body 14 made of the film 12 and the metal parts 1 and 2 are integrally joined. Therefore, according to the method of the above embodiment, a high-quality product can be obtained in which there are no pinholes or the like in the electrodeposited bellows body 14 at the portions corresponding to the outer edges of the mating surfaces 4, 5 and 6, 7.

It goes without saying that the present invention is not limited to the materials and shapes of the electroformed parts and metal parts, the number of joined parts, the joined positions, etc., to those shown in the drawings.

〔Effect of the invention〕

As described above, according to the present invention, the area between the mating surfaces of the metal component and the core is completely filled with adhesive, and a conductive metal film is formed on the outer surface of this adhesive, so that the mating surface is filled during electroforming. Since a continuous plating layer is also deposited on the portion corresponding to the outer edge, it is possible to obtain a highly reliable joined body of electroformed parts and metal parts without pinholes etc. due to the gaps between the mating surfaces, It has an excellent effect in that it does not require post-processes that are difficult to implement, such as bonding or welding electroformed parts and metal parts.

[Brief explanation of the drawing]

Figures 1 to 5 show 1ift as an embodiment of the present invention.
FIGS. 6 and 7 are explanatory diagrams showing the manufacturing process of bellows in order of process, respectively, and are explanatory diagrams showing conventional methods. 1.2... Metal parts 3... Core 4.5, 6.7
...Matching surface 8...Adhesive 10...Base metal 1
2... Conductive metal film 13... Electrodeposited bellows (joint body)

Claims (1)

[Claims] 1. A step of bonding the opposing mating surfaces of the metal part to be joined with the electroformed part and the core to be removed after molding using an adhesive; A step of cutting the surface of the base metal made up of the metal parts and the core to process the core into a desired shape, a step of forming a conductive metal film on the surface of the base metal, and then a step of forming a conductive metal film on the surface of the base metal; 1. A method for producing a joined body of electroformed parts and metal parts, comprising the step of electroforming a base metal. 2. The method of manufacturing a joined body of an electroformed part and a metal part according to claim 1, wherein the conductive metal film is formed by vacuum deposition. 3. The method of manufacturing a joined body of an electroformed part and a metal part according to claim 1, wherein the conductive metal film is formed by ion plating. 4. The method of manufacturing a joined body of an electroformed part and a metal part according to claim 1, wherein the conductive metal film is formed by electroless plating.