JPS6328528A - Coil member cutting type metal fiber manufacturing device - Google Patents

Abstract

PURPOSE:To easily manufacture a various sorts of metal fibers having the superior quality with high productivity by installing a number of coil materials having a narrow winding width on a same axis line or the parallel shafts nd cutting the small winding coil members by the equal number of cutters. CONSTITUTION:A small winding coil member 3 is obtained by winding a thin metal plate onto a core metal 4, with a winding width of about 10-30mm. The coil member 3 is installed onto a driving shaft 2 directly connected with a main shaft 8 through the core metal 4, and fixed, keeping a ring-shaped stopper 10 and a cylindrical spacer 11 interposed. Simultaneously with the revolution of the driving shaft 2, a cutting edge 5 is applied with a minute feed. In this case, the tool angle of the cutting edge 5 is set at 30-50 deg., and the rake angle is set at 30-45 deg., and the cutting width is set at 5-15mm, and a proper approach angle is provided, and a metal fiber can be manufactured easily and favorably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a metal fiber manufacturing apparatus, and particularly to a manufacturing apparatus for manufacturing long metal fibers by cutting a coil material.

[Conventional technology and its problems]

Compared to non-metallic fibers, metal fibers have excellent properties such as thermal conductivity, electrical conductivity, heat resistance, friction resistance, sinterability, and elastic modulus, so they are used as fillers for various composite materials and as bases for fiber metallurgy. It tends to be used as wood.

As a method for manufacturing such metal fibers, especially long fibers,
Various methods are known, such as the drawing method of a single wire or a bundled wire, the melt spinning method, and the cutting method. Among these methods, the cutting method requires simpler equipment and has relatively high production efficiency than other methods.
It has features such as a wide selection of materials.

A typical method under this criminal law is the wire cutting method. This method involves winding a large number of wire rods around a pair of left and right rolls with guide grooves, and pressing a grooved cutting blade onto these rolls to comb them.This method has the advantage of being able to efficiently produce long fibers at low cost. Since the cutting force 1 is provided exclusively by the elasticity of the wire, if slipping occurs or the mechanical strength of the wire is low, it is easy to break between the rolls, and for this reason, the fiber materials that can be manufactured are essentially limited to steel. It had the disadvantage of being exposed.

As another cutting method, a method is known in which a thin metal plate wound into a coil shape is used as a raw material and the material is turned.

However, in the conventional method for manufacturing metal fibers by cutting coil material, the end face of the coil material, which is wound to a large diameter and layered, is generally cut with one large width blade or multiple blades lined up. There is a difference in the circumferential speed on the inside and the inside, and the large cutting width tends to cause chatter, making stable cutting difficult.Furthermore, the fiber generation speed is different, making it difficult to take off, and the material weight is large, making it difficult to install. The reality is that it is rarely used industrially due to problems such as difficulty in handling.

[Means for solving problems]

The present invention was devised after repeated research in view of the above-mentioned circumstances, and its purpose is to provide an apparatus that can mass-produce high-quality long metal fibers of various materials at low cost and without any restrictions on manufacturing efficiency. .

In order to achieve this object, the present invention has developed a plurality of small-wound coil materials whose winding width is narrowed to a range in which the difference in cutting speed due to the difference in inner and outer diameters does not affect cutting, and these small-wound coil materials are arranged in series or in parallel. The installation consists of a shaft that rotates simultaneously, a plurality of blades corresponding to each small-wound coil, and these blades as a device that combines the shaft and the means.

〔Example〕

Figures 1 to 3 are an embodiment of the present invention (first embodiment)
1 is a bed installed on a base floor, and a main shaft 8 driven by a drive device 7 such as a deceleration motor is provided on the minus side.

A long drive shaft 2 is directly connected to the main shaft 8, extends horizontally on the bed 1, and has its tip supported by a tailstock 9.

3 is a plurality of small-wound coil materials, and a thin plate of a desired material is wrapped around a pipe-shaped core metal 4 with a winding width t such that the difference in cutting speed due to the difference in the inner and outer diameters does not affect the actual cutting. , preferably 10 to 30 mm). The small-wound coil members 3, 3 are fitted and fixed onto the drive shaft 2 at predetermined intervals via the core bar 4.

This fixing mechanism is optional, and in the one shown, the drive shaft 2
A ring-shaped stopper 10 that can be reduced in diameter in the radial direction is attached to the cylindrical spacer 11 to arbitrarily position the core metal 4 in the axial direction.
Connection in the circumferential direction is achieved by fitting the keys 13 and 13 of the core bar 4 into L and 2.

5 is a number of cutting blades corresponding to the number of the small coil material 3, and either a smooth blade or one with fine grooves on the flank side is used. The cutting blades 5゜5 are each fixed to a turret 15゜15 installed on the feed stand 14, and
4 is adapted to be fed parallel to the drive shaft 2 by a drive device 15. This drive device 15 may transmit the power of the main shaft motor, but in order to obtain minute feed, it is better to use a dedicated continuously variable speed motor and a worm gear reduction mechanism. This first embodiment has the advantage that the structure is simple because the drive can be performed by one axis.

4 and 5 show another embodiment (second embodiment) of the present invention, in which a wide headstock 1' is erected on a bed 1,
A large number of spindles 2' are arranged at required intervals on this headstock 1'.
, 2' are installed in parallel, each main shaft 2'.

At least one of the main shafts 2' is used as a drive shaft, and is driven by a drive device 7' such as a deceleration motor, and the other main shafts are synchronously driven by a transmission mechanism 16 such as a gear. A stopper 17 is provided on each shaft 2', 2', and the core metal 4 around which the small coil material 3 is wound is fitted and fixed via the stopper 17.

Furthermore, a table 18 is disposed on the bed, and a tool rest 1 on which a cutting blade 5 for each small coil material 3 is attached.
5 is mounted, and a feed parallel to the main shaft 2' is provided by a feed drive device similar to that shown in FIGS. 1 to 3. In this case, the feeding movement may be carried out by synchronously feeding the entire tool rest 15, or by dividing the tool rest 15 into a plurality of independent parts and performing the feeding movement by each individual feeding drive device.

The latter method has the advantage of being able to simultaneously produce metal fibers with different fiber diameters.

This second embodiment has a slightly more complicated device structure than the first embodiment, but since each cutting operation is independent, the cutting conditions do not affect each other, and the small-wound coil material 3 It has the advantage that it is easy to attach and detach.

In other drawings, 20 is a fiber guide roller, and 21 is a winding roller.

[Effect of the embodiment]

Since the present invention has the above-described configuration, a small coil material 3 is prepared in manufacturing the metal fiber. This can be done easily by winding a thin metal plate made of the material for manufacturing purpose around the core bar 4 with a narrow winding width, and only requiring the effort of rewinding the large diameter coil material.

Then, the obtained small-wound coil material 3 is externally fitted and fixed to the drive shaft 2 or main shaft 2', 2' through the core bar 4, and as the shaft is rotated as shown in the figure, the cutting blade is cut by the drive device 15. 5 gives a slight feed.

Manufacturing conditions vary depending on the material characteristics of the fiber raw material, etc.
Generally, the feed rate should be selected from the range of 0.01 to 0.05 m/re and the cutting speed of 5 to 80 m/min.
The smaller the feed rate, the finer the fibers can be produced.

The blade has, for example, a blade angle of 30 to 50 degrees, a rake angle of 30 to 45@, and a cutting width of 5 to 15 nn, preferably with an approach angle α. Adoption of this approach angle α is particularly effective when working with hard materials such as brass, and because the force applied to the material from the blade is dispersed, it stabilizes the feed and reduces chatter vibrations, making it possible to reduce the cutting width even in a high cutting speed range. It is possible to produce large and good quality fibers.

Figure 7 shows approach angle: 15°, rake angle: 40°, blade angle = 38°, cutting width: 5m, raw material: diamond steel, plate thickness: 0.
08nn, winding width: 10 mm, shows the state of fiber formation in each small-wound coil material.

In the figure, Δ is the area where powdery chips are generated, * is the area where the fibers are curled or split, the mouth is the area where smoke is generated due to high temperature or chips are generated where the fibers are welded together, and O is the area where the chips are good. It is a bull's territory. The dotted line in the figure shows the case where the approach angle is 0°, and it can be seen that the fiber production area has been significantly expanded.

FIG. 9 shows the relationship between the number of small coils (=number of blades), production amount, and fiber diameter when the cutting speed is 20 m/win, and it can be seen that good productivity can be obtained.

Figure 8 shows data when aluminum fiber was produced using the apparatus of the present invention, and the winding width of the small coil material was 3.
0nn, plate thickness 0.30nn+, approach angle 15°, cutting width 15ma+, rake angle 4oa, and blade angle 38°. In the figure, 0 is the powder production area, and the mouth was good, but slightly curled fibers were produced. The region O is a good fiber production region.

As is clear from this figure, compared to brass, the fiber production area is wider and production is easier.

The obtained long fibers have a substantially rectangular cross section, and since the rolling direction and the fiber axis direction are the same, they are difficult to break and have good strength. Therefore, any material that can be wound into a coil shape, such as ordinary steel, stainless steel, copper, and nickel, can be used, in addition to the above-mentioned brass and aluminum.

〔Effect of the invention〕

According to the present invention as described above, a large number of coil materials with narrow winding widths are mounted on the same axis or on parallel shafts, and each of the small winding coil materials is cut with the same number of blades, so that various materials can be cut with good quality. Metal fibers can be manufactured easily and with high production efficiency, the weight of the material is small, so it is easy to handle, and the fiber production speed is the same, so it is easy to take off and has good workability. You can get the same effect.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the coil material cutting type metal fiber manufacturing apparatus according to the present invention, Fig. 2 is a partially enlarged view of Fig. 1, and Fig. 3 is taken along the line TV-IV in Fig. 2. 4 is a perspective view showing another embodiment of the present invention, FIG. 5 is a sectional view thereof, FIG. 6 is a perspective view showing a fiber manufacturing state according to the present invention, and FIGS. The figure is a graph showing fiber production according to the present invention, and FIG. 9 is a graph showing the relationship between fiber diameter and production amount.

Claims (1)

[Claims] A plurality of small-wound coil materials whose winding width is narrowed to a range where the difference in cutting speed due to the difference in the inner and outer diameters does not affect cutting, and a shaft on which the small-wound coil materials are attached in series or parallel and rotated simultaneously; A coil material cutting type metal fiber manufacturing apparatus characterized by comprising a plurality of blades corresponding to each small-wound coil, and the blades are provided with the shaft and the means.