JPS5893560A - Production of composite fibrous metallic material - Google Patents

Abstract

PURPOSE:To produce a composite fibrous metallic material which is infiltrated with molten metal among fibers and is easy to machine by setting fiber moldings molded in conformity with the shapes of the reinforcing parts and machining parts of products in dies and casting the products. CONSTITUTION:In producing pistons for diesel engines, etc., first fiber moldings 1 which are formed into a torus shape in conformity with the shapes of the parts to be reinforced of products and are formed with annular grooves 1a in the outside circumferential parts in conformity with the parts to be machined away after working are produced by using fibers of ceramics, metals, etc. After such fiber moldings 1 are set in dies 2 by bringing the outside circumferential surfaces thereof into tight contact with the inside surfaces of the dies 2, a melt of aluminum or the like is filled in cavities 3, and the melt is pressurized so as to be infiltrated in the moldings 1, whereby the melt is cast. The casting is machined along the working lines B and the grooves 1a are machined by spacings (m), (n), whereby the product is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a fiber composite metal material, which is applied to, for example, a piston for a diesel engine, and which is a composite of a fiber molded body made of fibers such as ceramics or glass.

When manufacturing a fiber composite metal material by casting a fiber molded body, conventionally, the shape of the fiber molded body has not been sufficiently considered, and a simple rectangular parallelepiped or cylindrical shape has been used. For example, when manufacturing pistons, a simple ring-shaped fiber molded body with a rectangular cross section is used. Conventionally, such a fiber molded body is set in a predetermined position in a mold and then cast. , this fiber-reinforced portion was cut to form a ring groove.

However, when the fiber molded body is placed in the mold and pressure cast, the am air of the fiber molded body escapes to the center of the molded body and the part that is in contact with the metal. The problem was that the water circulation was poor and the molten metal did not penetrate easily. In addition, when cutting the fiber-reinforced part, there is a problem that the processing cost for the fiber-reinforced part is large.

The present invention is intended to solve the above ε problem, and takes into consideration the product shape of the cast-in part of the fiber molded body, so that the melt can sufficiently penetrate into the fiber molded body, and the cutting side processing of the fiber #IA reinforced part can be carried out. The purpose of the present invention is to provide a method for easily producing nine-fiber composite metal materials.

The present invention involves forming a fiber molded body according to the shape of the part of the product to be reinforced and after processing [according to the part to be removed], and setting the fiber molded body at a predetermined position on a metal circle. This is a method for manufacturing a fiber composite metal material, which is characterized by casting.

Embodiments of the present invention will be described below with reference to the drawings.

When manufacturing pistons for diesel engines etc. by the method of the present invention, K, ceramics,
A fiber molded article 1 made of metal fibers and formed into an 8-square shape according to the unusual shape of the part to be reinforced in the product, and an i-shaped cross 1a on the outer periphery according to the part to be #%IJIIj after processing. Manufacture. Next, as shown in FIG. 2, the fiber molded body 1 is formed into $ 1 a and the outer m surface is brought into close contact with the inner box of the metal lid 2, and after setting it in a predetermined position of the metal lid 2, it is placed in the cavity 5. The molded fiber body 1 is filled with a molten metal such as , aluminum, etc., and the molten metal is pressurized to penetrate into the fiber molded body 1 and cast.

In this case, the new dimensions (
For example, when using a conventional fiber molded body 1't- of the same dimensions as 10 cm long x 1 Q wm wide (see Figure 5)
In the case of K6, the penetration of the molten metal was poor in the area surrounded by the 2nd circular image of the metal lid in Figure 3 and the dotted line, but in the case of this example, the center was hollow due to $1aK. Therefore, the molten metal permeates from the outer shell of the fiber molded body 1 toward the center while letting residual air in the fiber molded body 1 escape into the grooves 1a, and thus penetrates throughout the fiber molded body 1.

In addition, in Figure 2 and Figure 7113, one-point chain koji B
indicates the processing line, and is marked by the processing gilB and gold ff12 Uchiyama III! # The part of the molded body 1 indicates the part to be scraped off after processing.The range of this part to be removed is, for example, in Fig. 2 of Rattan 2, the interval t is 1 inch, the interval m is 5 to 4 cm, and the interval am is 6 - It is the range of rank.

The thus cast product is cut along machining line B.

Therefore, depending on the manufacturing method of delicate composite metal materials as described above, when casting the fiber molded body after setting it in a predetermined position in the metal interior, grooves etc. formed in the fiber molded body may be removed. By adjusting the shape to match the part to be removed after processing, the K11L hot water can be sufficiently permeated throughout the fiber-formed body, and a product with quality suitable for the soil can be obtained. Good.

When machining after casting, the machining allowance f of the fiber-reinforced part, which is difficult to cut, is smaller than that of conventional products, making it easier to process and has the great effect of making it possible to use cast metal for processing tools, etc. play.

[Brief explanation of the drawing]

Figure #11 is a perspective view showing the fiber molded body used in the method of the present invention, 11211m is a cut-away box diagram showing the thing in Figure j11 set in a predetermined position in Venus, and Figure 5 is a conventional fiber. This is a partially cutaway diagram showing the molded body set in a predetermined position inside the metal lid. ′Yabitei”゛”
(1 person) t/l! 3 a Year 2 Figure 23

Claims (1)

[Claims] (1) A fiber molded body is molded to match the shape of the part of the product to be reinforced and the part to be removed, and the fiber molded body is set in a predetermined position within a metal molding, and then cast. A method for producing a fiber composite metal material.