JPS58149331A - Production of metal fiber - Google Patents

Abstract

PURPOSE:The cutting direction is made same as that of the fiber, the included angle and the radius of the top end of the edge are set sepcific in the edge for cutting the surface of a metal block, to produce good-quality metal fiber with extreme fineness and less quality fluctuation. CONSTITUTION:The cutting speed is set according to the material, the feed rate of the cutting blade is set small. Further, the shape of the cutting blade is designed so that the back clearance angle to the metal block is 2-8 deg., the side clearance angle is 2-4 deg., the included angle of the triangular edge top is 5-45 deg. and the radius at the edge top is as fine as 0.05-0.2mm.. The resultant cutting blade is used to make the direction of cutting same as the fiber direction and cut the surface of a metal block, producing metal fibers of extremely fine thickness of 20-100mu.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a certain length, i.e. approximately 20 yx-L 200 M
w, a method for manufacturing metal fibers with a wire diameter of 20 microns to 100 microns.

Metal fibers have superior properties such as heat resistance, abrasion resistance, and good electrical conductivity compared to non-metallic fibers such as glass and carbon, and are used in various materials such as reinforced plastics, conductive plastic materials, and shielding materials. *Used as a namegawa or functional composite member.

However, the diameter of the metal tamc used for this type of application is 10
Short metal fibers having a length of 0 micron or less and a length of 10 fl or less are often used, and a method for producing these short metal fibers is disclosed in Japanese Patent Publication No. 56-51050 ``Method for producing short metal fibers''.

However, when mixed with resin as a conductive plastic material, radio wave shielding material, or surface heating element, the "
A relatively long metal fiber (diameter 10
0 microns or less in length and 208 to 2003 El in length (hereinafter referred to as long fibers) are desired, but compared to the mass production technology of short metal fibers using automatic vibration, industrial manufacturing methods for long fibers are insufficient. has not been established.

The present invention has a diameter of Lof Miku4 or less and a length of 20WM42Q.
This relates to a method for inexpensively producing large quantities of high-quality long metal fibers that are extremely fine, about Q1111, and have little variation.

In order to create long fibers with an extremely fine wire diameter than metal blocks, the shape of the cutting edge of the blade for cutting lamps and metal blocks is made into a special shape that breaks the conventional wisdom, and the blades are cut directly from the metal blocks to produce Saa This process is characterized by producing long fibers whose axial direction is the same as the cutting direction.

Regarding the shape of the cutting edge of the knife of the present invention, in order to cut a fibrous shape of 100 microns or less from a metal block, the tip of the cutting edge is shaped with an extremely thin radius of 0.2 ff or less in width, and the angle of the cutting edge (θ1) 45 degrees or less, and below a certain speed, for example 2, although there are some differences depending on the metal to be cut.
If a metal material is rotated at a speed of 5011117ffiim and cut with a cutting depth of 0.1ff or less, metal fibers of 100 microns or less can be continuously created.

Embodiments of the present invention will be described below based on the drawings.

Figures 1 to 5 show the Ryuichi method when the metal block to be cut is a round bar. 1 is the Shinshin center, 8°3 a #8
b #... is a groove inserted into the metal block 8, and its depth is represented by 4. The groove is divided into 4 equal parts around the circumference of the metal block, and 6
Divide into equal parts [IJσ1 Also, the length of the circumference of the block is the length of the long fiber. Therefore, the circumference & S dividing groove is
If not, the outer periphery of the block will be the length of the long fibers.

Reference numeral 5 is a cutting tool according to the present invention, and reference numeral 6 is a tip consisting of a tip end 6a and a front flank surface 6b. . 7a*7b are long fibers that can be continuously created by the cutting blade 5.

In the above structure, the method for manufacturing ultrafine long fibers will be explained.The cutting speed can be adjusted to an appropriate range depending on the material, for example, 5.
0~300*/ff Set to 11m and reduce the feed f of the cutting blade, for example, 0.025~Q, l
snw / win, and furthermore, regarding the shape of the cutting blade that forms the basis of the present invention, the front clearance angle (γJ is 20 to 80 and the side clearance angle ψ) with respect to the metal block shown in Fig. 8 is 2.
The angle of the triangular cutting edge (01) on the front side of the cutter when viewed in the direction of arrows A to A shown in the figure is 5"-45°, and the 7-4 angle at the tip of the cutting edge is 0.05". This knife is characterized by its extremely fine size of ~0.2 mm.When cutting with a blade of this shape, ultra-fine fibers of 20 microns to 100 microns are continuously created, resulting in a length of taB. The fiber thickness is determined by the length of the circumference of the metal block divided into grooves, and the fiber thickness can be controlled by the cutter depth (1) and the cutter feed when the cutting speed is constant. speed(
When v) is constant, the smaller the cutter's depth of cut (1>) and the smaller the cutter's feed (fl), the thinner the fiber width becomes. The fibers become thicker.

Next, examples will be shown based on the present invention.

Example 1 ■ The material to be cut is aluminum with a diameter of 16θφ and a length of 200 rin.
The tool is shown in Fig. 2 using a material (JIS5056).

Cutting edge angle (θ1) θ, = -15° Front relief angle γ = 5° Side relief angle (p> β = 2° Tail of cutting edge @ R = 0.1j Length of cutting edge ←) Radiation = 10m Cutting edge The material is set to high-speed steel, cutting speed Y=25011/win, feed f
=0-025 m/remer 0-05 HH/
rev.

Cutting depth t=0.1m and 0.851 at 0.1m1rev
Long fibers were produced under 11 conditions.

For the delicate length, divide the metal block into 8 equal parts and divide the groove width into 2+11 pieces.
．． Processing was carried out with a groove depth of 25+11.1) As a result, fine continuous metal fibers with the luster of aluminum, about 40 microns in diameter and about 60 m long, could be reliably created.

The relationship between the thickness of the fibers created by changing the feed <1> and the cut (1) as a result of this implementation is shown in FIGS. 5(a) and 5(b).

■ Regarding (a) in Figure 5, if the cutting speed (ma) and depth of cut (1) are constant in the relationship between the fiber diameter and the feed (
As f) increases, the fiber diameter gradually becomes thicker, and in the ←] period, if the cutting speed (V) and feed (f) are constant in the relationship between the fiber diameter and the depth of cut (t), the depth of cut (1 ) indicates that the larger the fiber diameter, the thicker the fiber diameter.

G) Feed (f) shown in Figure 5 (a) and stem) d f = O
Even when cutting at -11 F'rev or more and the depth of cut (t) t = 0.4n or more, the cutting material did not connect into fibers and buckled, resulting in a chip state similar to that of the conventional example. 2 (A round bar made of 545C steel with a diameter of 15 (11, length 200) was used as the material to be cut, and the cutting edge angle (θ1) θ1 = 10° Front relief angle Q) γ = 5° Side relief angle ψ) β = 2゜The length of the cutting edge I R = 0.21ff The length of the cutting blade) = 10M Cutting blade material Set to high speed steel, ma = 250 ” / win s f = 0
Long fibers are produced under the conditions of -05"/r・ma, t=Q, and 1m. The length of the fibers is divided into 8 equal parts of the metal block, and the groove width is 2M.
The groove was machined to a depth of 5 sm.

1) As a result, fine continuous metal fibers with a diameter of about 50 microns and a length of about 6011 mm and having the luster of steel were reliably created.

■For comparison, the cutting edge angle (θ1) = 5o with a normal tool.

, radius of the cutting edge ■l=1. The test was carried out under the same conditions as above, but the result was a so-called chip with a thickness of 2 inches and 150 microns, which was fibrous and non-continuous.

As explained above, the present invention has a wire diameter of 20 microns to 100 microns.
It is possible to produce large quantities of micron-thin metal fibers with a large surface area and strength, has high productivity, requires simple equipment, and is extremely effective.

[Brief explanation of the drawing]

The figures are enlarged views of the cutting blade of the present invention, (a) is a side view of the blade, trunk) is a view taken along the line A-A in (a), and (c) is an enlarged view of the tip of the blade. FIG. 4 is a side view of an embodiment according to the invention, and FIG. 5 is a side view of an embodiment according to the invention, and FIG. A graph showing the relationship between the fiber diameter and the feed and the depth of cut, where (a) is a graph showing the relationship between the fiber diameter and the feed, and ←) is a graph showing the relationship between the fiber diameter and the depth of cut. 8...Metal block, 5.・
・Cutting knife, 6 &... Ending rule at the tip of the blade, '7m
, 7bego...metal fiber. Patent Applicant Aisin Seiki Co., Ltd. Representative Reio Nakai No. 1"l Figure 4 Figure 3 Figure 5

Claims (1)

[Claims] The length of gold Rtt% fiber is 2Qm by directly cutting the Kinya block.
~200fi, wire diameter OQ micron ~ 100 micron In the method of manufacturing ultrafine metal fibers, the van axis direction is the same as the cutting direction, the shape of the cutting blade that cuts the surface of the metal block, and the cutting edge angle (θ1) 5'-45°, and the cutting edge of the cutting edge is set at 0.05ff to 0.2mm, and the surface layer of the metal block is cut to create metal fibers. Law.