JPS5997848A - Light tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to lightweight tools made using composite metal materials.

Currently, tools such as spanners and wrenches are made of steel for general use, and tools used in areas where open flames are strictly prohibited are made of beryllium copper alloy. The drawback is that its weight is very large,
The larger the tool, the greater the burden on the worker, and because the specific gravity of both tools is similar, it becomes difficult to tell the difference if the surface becomes dirty after long periods of use, and there is a high risk of using the tool incorrectly. It is a certain thing.

Therefore, it is lightweight, reduces the burden on the worker, and
There is a need to produce lightweight tools that are easily distinguishable from tools made from 7um copper alloys.

It has been reported in foreign literature that one experimentally produced spanner made of carbon fiber reinforced plastic could be used as a substitute for tools made of beryllium copper alloy, but there were problems with wear resistance, etc. C is unsuitable for lightweight tools.

However, the present invention has revealed that such a desire can be easily achieved by manufacturing a tool using a lightweight composite metal material that is toughened by using inorganic fibers.

Examples of inorganic fibers include alumina fibers, carbon fibers, boron fibers, silicon carbide fibers, and silica fibers.

Alumina fibers contain alumina as a main component and subcomponents such as silica and magnesia, and have unique characteristics such as high strength, high modulus of elasticity, and transparency.

In addition, when comparing carbon fibers, boron fibers, silica fibers, etc., alumina fibers are less likely to react even when they come into contact with molten light metal materials, resulting in fiber deterioration. As the reinforcing fiber, C is preferable.

There are two types of alumina fibers: wool-like short fibers and continuous long fibers.
When short fibers are used as fibers for reinforcing light metal materials, metallic materials with very high strength cannot be obtained. An inorganic fiber-reinforced lightweight composite metal material with high strength can be obtained.

Alumina long fibers also have different properties depending on the manufacturing method, composition, crystal type, etc., and the strength of the reinforced lightweight composite metal material changes. The fiber that can most significantly exhibit the effects of the invention is the alumina fiber described in Japanese Patent Publication No. 51-18768.

That is, silica alumina fibers obtained from polyaluminoxane having a structural unit represented by the general formula % formula % (wherein Y represents one or more of organic residues, halogens, and hydroxyl groups) as a raw material and from this glue. Alumina fibers obtained by mixing one or more compounds containing nail diel with a silica content of 28% or less, and firing the precursor a-fiber obtained by blocking the mixture. The alumina fiber preferably has a silica (Sin2) content of 2% by weight or more and 25% by weight or less, and shows substantially no reflection of α-A40g in its X-ray structure. This alumina fiber contains lithium, beryllium, boron, sodium, etc. within a range that does not impair the effects of the present invention.
Magnesium, phosphorus, potassium, calcium, titanium,
It may contain refractory compounds such as oxides of one or more of chromium, manganese, yttrium, zirconium, lanthanum, tungsten, barium, and the like.

The content of these fibers in the composite metal material is 10-60
A range of volume % is appropriate.

Examples of the ax gold material include aluminum, aluminum alloy, magnesium, and magnesium alloy.

Examples of lightweight tools include single-ended spanners, double-ended spanners, adjustable wrenches, pipe wrenches, single-ended box-end wrenches, double-ended box-end wrenches, drum handles, pliers, and pliers.

Table 1 shows the physical properties of various tool materials. Further, an example of a spanner is shown in FIGS. 1 and 2.

Table 1 Material properties for tools Density (1 layer) Approx. 8 Approx. 8 Approx. 8 Magnetism
None None With Tensile strength (kgM
) 9o 185 ≧96 Yield point (k-) approx. 90 90 >g.

Elongation rate (%) 0.6-1.0 2-4〉8* Luminous fiber reinforced aluminum (50% alumina fiber)
) (5) As can be seen from the physical property values of various tool materials, the single-layer product of the present invention is extremely lightweight, and even in terms of yield point, it has the same strength as other tool materials.

Furthermore, since it has no magnetism, it can be used even in strong magnetic fields.

Example I When filling alumina fiber into a mold having a shape corresponding to JI584680 round piece loss spanner 22ff, alumina fiber (AltOs content 85 weight 1 to 96.5 inch 2
Jl content: 15% by weight, average fiber diameter: 17-18μ, tensile strength: 160#/+d, elastic modulus: 28,500 kg/d
) was immersed in a dicrotane solution (II degree approximately 10%) of polymethyl methacrylate/dibutyl phthalate (70/80) to prepare a ribbon-like thin plate-like presheet made of alumina fibers in advance.

These presheets were filled into the part of the mold corresponding to the shaded area in FIG. 1 to a fiber content of about 50%, and composited with aluminum (6) ram using a molten metal forging machine. For composite strips, the mold temperature is 450°C1
Molten metal temperature soo'c1 Molten metal forging pressure 1.000kg/c
d1 Pressure was applied for 8 minutes to produce a round single-ended spanner.

When I used a wooden cross-head spanner, I was able to use it without any problems just like a regular single-head spanner.

Example 2 JIS84682 Mega: 4 Wrench IF; Short 22f
A mold having a shape similar to fx24n was filled with alumina fibers in the same manner as in Example 1, and then composited with aluminum using a molten metal forging machine to produce the box wrench shown in Fig. 2.

When I used this double-ended box end wrench, I was able to use it without any problems, just like a regular double-ended box wrench.

[Brief explanation of the drawing]

FIG. 1 is a drawing of a single-end spanner showing an example of the tool of the present invention, and the shaded area shows that the tool is not filled with alumina fibers. FIG. 2 is a drawing of a box wrench showing an example of the pond of the present invention, and the shaded area indicates that it is not filled with alumina fibers. (1 content unchanged) Figure 1゜1co 2゜Procedural amendment (method) % formula % 1. Indication of the case 1982 Patent application No. 205808 2. Name of the invention Lightweight tool 8. Amendment Relationship with the case of a person making a patent application Patent applicant address: 5-1, Kitahama, Higashi-ku, Osaka City February 22, 1982 (shipment date) 6. Drawing subject to amendment 7, content of amendment as shown in attached sheet (2 complete) )

Claims (1)

[Claims] A lightweight tool made from lightweight composite metal material toughened by inorganic fibers.