JP2531573B2 - Metal wire rod, manufacturing method thereof, and manufacturing apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal wire rod for cutting metal thin plates in parallel with a predetermined width to obtain a metal wire rod, a method of manufacturing the same, and a manufacturing apparatus therefor.

In recent years, so-called new materials called difficult-to-add materials have appeared. In many cases, the new raw material is rolled into a flat plate by using a hot rolling roll in a high temperature state after completing the electric melting of the raw material.

Generally, the rolling thickness of 4 mm to 3 mm by the hot rolling method is the limit for the industrial industry (economical).

If a method of molding these new materials into a thin wire rod is economically feasible, its utility value will be significantly increased socially.

Among the new materials mentioned above, titanium or titanium alloy, which is said to be difficult to process, is a fine wire material manufacturing process, and it is a point that the substance is ridden by the manufacturer. As a result, the degree to which the molding tool is worn is large.

Therefore, it is necessary to make the relative friction velocity with the molding tool extremely small.

On the other hand, industrially, the speed is one digit higher (for example, 2
Although it is necessary to manufacture a thin wire at a production rate of 00 m / min), high-speed production has been extremely difficult due to the above characteristics.

The present invention enables high-speed production, which can be industrially sufficiently utilized, from a thin metal plate having characteristics such as titanium or titanium alloy in the new material, and significantly contributes to the industrial field.

[0009]

2. Description of the Related Art Conventionally, a thin metal plate 1 is placed on a rolling roll to form a large number of V-grooves 3 (FIG. 6), which is torn from the bottom of the V-grooves to form a metal wire rod 7, which is formed by forming rolls 9 and 9. An apparatus for manufacturing metal wires is known (Japanese Patent Publication 1)
-26763).

[0010]

According to the conventional manufacturing apparatus described above, not only an excessive pressurizing force is required for forming the V groove by one rolling roll, but also the tear resistance of the residual thickness portion is large. However, there is a problem that requires a large tensile force.

As described above, the reason why the excessive pressurizing force is required is that the pressurizing area (S surface in FIG. 6A) is large in order to form the cross section as shown in FIG. 6A. Because of that. Therefore, the convex portion of the rolling roll is significantly worn out, and the tear cross section cannot be made thin, so that a large tearing force is required. In addition, the need for excessive pressurizing force causes a limitation in the thin metal plate that can be processed at one time, and naturally there is a problem that the number of metal wire rods manufactured at one time decreases. .

Further, in the above-mentioned known technique, since the erection axes of the rolling roll for forming the V groove and the rolling roll for forming the metal wire are parallel to each other, the forming roll is formed on the front and back sides of the thin metal plate. Since the roll comes into contact and the torn surface cannot be molded, the torn surface (XY cross section) of the metal wire remains as a rough surface, so the rough surface must be corrected by cutter cutting or other means after tensile cutting. There was a problem that had to be addressed.

Since the above-mentioned strength requires not only a tensile force but also a correction means such as cutting, there are problems that the manufacturing efficiency of the metal wire is lowered and the manufacturing cost is increased.

Further, according to the above-mentioned known example, since the wire rod has a quadrangular cross section, there is a problem that rolling fins 12 are likely to occur during pressure forming (FIG. 6B).

[0015]

According to the present invention, however, by forming the metal wire rod having the flat portions above and below each wire rod, it is possible to prevent the generation of fins during wire drawing.

Further, since the V-grooves are successively formed in the processing of the thin metal plate, the pressing force is reduced, and further, the V-grooves are made deeper and smaller, so that the pressing force of each rolling roll can be remarkably reduced. did it.

Further, by using the separating plate, it is possible to remarkably reduce the pulling force, and the problems of the prior art are improved.

That is, in the invention of the wire rod, in a cross section perpendicular to the center line of the elongated material, there are parallel sides of a predetermined width at the upper and lower sides, and inclined planes made up of a plurality of broken lines are provided on the left and right sides of the parallel side and the cross section is vertically symmetrical. The metal wire rod is characterized in that Further, the invention of the method is such that a thin plate material is pressure-molded from above and below by a rolling roll to form a V groove symmetrically in the vertical direction, and adjacent wire materials which are separated by the groove portion of the thin plate material are alternately arranged on one surface of a separation plate having an acute angle or A method for manufacturing a metal wire rod, which is characterized in that it is alternately drawn to the other surface, wherein a thin plate material is pressure-molded from above and below by a rolling roll to form V grooves symmetrically in the vertical direction, and the front of the V groove forming portion is formed. In the method of manufacturing a metal wire rod which is alternately separated into upper and lower parts by interposing a separating plate having an acute angle, the V groove is formed by a plurality of freely rotating rolling rolls, and the V groove angle becomes smaller as the depth becomes deeper. This is a method for manufacturing a metal wire rod.

Next, in the invention of the apparatus, in a device for forming a large number of V-grooves on a thin metal plate in parallel by rolling rolls and cutting the V-grooves into metal wire rods, the device is arranged in front of the final rolling roll. An apparatus for manufacturing a metal wire rod is characterized in that an acute-angled separating plate is installed at a central portion of the pinch roll on the drawing-out side of the metal wire rod so that a sharp edge thereof is close to the pinch roll.

Further, a plurality of sets of rolling rolls are installed in parallel, only the first set of rolling rolls is driven, and the other sets of rolling rolls are freely rotated. A plurality of sets of rolling rolls are installed in parallel. The angle of the V-shaped annular ridge of the first rolling roll is maximized, and the angle of the V-shaped annular ridge of the subsequent rolling roll is gradually decreased.

The angle of the V groove in the above is, for example, 90 ° for the first rolling roll, 70 ° for the second rolling roll, and the third.
The rolling rolls of No. 1 and No. 2 gradually reduce it to 50 °.

However, the reduction amount of the angle is not limited to the above.

The first rolling roll has a large diameter and the second,
The third rolling roll has a small diameter, and the pinch roll has an appropriate diameter.

Next, the angle θ of the separating plate is preferably 15 ° to 30 °. For example, if the angle is small, the tearing force will be small, but if the angle is small, the strength of the separating plate will be small. Therefore, the correlation between the strength requirement and the tearing force is as described above.

[0025]

According to the present invention, by providing a flat surface on the metal wire rod, rolling fins do not occur during roll forming (using cassette rollers or rolling rolls) when further guiding the separated metal wire rod to the fine wire process.

Further, since a plurality of sets of rolling rolls are provided and the angle of the annular ridge of the second rolling roll is made smaller than that of the first rolling roll, the rolling can be sufficiently formed with a small force and the force at the time of tearing can be small. It will be. Further, since the metal wire is pulled by using the separating plate, the tearing force can be remarkably reduced (1/4 to 1/2 of that in the conventional case).

[0027]

EXAMPLE A titanium thin plate 1 having a thickness of 4 mm is rolled on first rolling rolls 2 and 2 to form V grooves 3 and 3 having a pitch of 5.6 mm and an angle of 90 °. Next, the second rolling rolls 4 and 4 are formed into V grooves 3a and 3a having an angle of 70 °, and the third rolling rolls 5 and 5 are further formed into V grooves 3b and 3b having an angle of 50 °.
To mold. Since the second and third rolling rolls 4 and 5 are installed so as to be freely rotatable, the pressing force at the time of roll forming is significantly reduced. Therefore, a large number of metal wire rods can be produced by processing once.

For the roll forming described above, the titanium thin plate 1 is used.
Of the pinch rolls 11 and 1 having a large diameter in front of the rolling rolls 4 and 5, since it is necessary to pull them in the forward direction (arrow 10).
1 is installed.

Since the pinch roll 11 is shaped so as to be in contact with the front and back flat surfaces 3c, 3c of the titanium thin plate 1 and the V-groove side wall (90 ° inner wall surface) formed first, a strong tensile force is applied. Obtainable.

On the pull-out side of the pinch rolls 11 and 11, a ceramic (or ceramic-coated metal) separation plate 6 having an acute angle of 15 ° is installed, and the V groove 3 is provided.
The titanium wire rods 7 and 7 separated by b and 3b are drawn up and down, and the titanium wire rods 7 and 7 are wound on the take-up reels 8 and 8.

In the above description, since the separating plate 6 has an acute angle (15 °), the tearing force is about 1/4 of the normal tearing force to achieve the purpose. The titanium wire rods 7 and 7 wound up as described above are successively welded one after another, and then molded by a known cassette roller and drawn to a predetermined diameter to form a titanium wire having a long desired diameter.

In the above embodiment, the first rolling roll 2 has a V groove of 90 °, the second rolling roll 4 has a V groove of 70 °, and the third rolling roll 5 has a V groove of 50 °. However, the number of rolling rolls and the angle thereof are not limited to those described above, and the number of rolling rolls and the V-groove forming angle are appropriately selected depending on the material of the material to be rolled.

Further, as shown in FIG. 3- (b), the roll groove formed by a roll (cassette roller or rolling roll) used for rolling forming when the separated metal wire 7 is further guided to the thin wire process is as shown in FIG.
Since the flat surfaces 3c and 3c are provided between the adjacent V-grooves 3 and 3, a flow gap 14 of the material is generated between the ridges of the forming roll 13 at the time of pressure forming of the wire rod, and fins are generated by the roll forming. Can be prevented in advance.

Further, since the V groove is sequentially formed by a plurality of rolling rolls, the reaction force at the time of forming by one set of rolling rolls becomes relatively small, the rolling speed is improved, and the number of wire rods that can be formed simultaneously is increased. The binding rolling efficiency can be improved.

Further, the final shape of the V groove has a more acute angle (for example, 5
0 °) makes the stress concentration at the time of tearing rational, and a large tearing force can be obtained with a relatively small force. In combination with the effect of the separating plate, a large tearing force can be obtained with a relatively small force. The same effect as above can be obtained, and the forming speed can be increased and the width of the metal thin plate that can be processed at one time can be increased.

[0036]

According to the wire of the present invention, since fins are not generated at the time of rolling and forming, the secondary processing for cutting off the fins is unnecessary, and as a result, the processing cost can be reduced. According to the method and apparatus of the present invention, the V groove is sequentially processed, so that the pressing force when passing through one set of rolling rolls is relatively small and the object can be sufficiently achieved.
Therefore, there is an effect that it is possible to perform roll forming from a wider metal thin plate at a higher speed. In addition, since a separating plate is used, the tearing force can be small, which saves power and the winding tightening force of the take-up reel.Because the tightening force at the time of winding is small, there is no risk of being caught too hard. There are various effects such as no.

According to the present invention, since the tear cross section becomes extremely small, there is an effect that there is no need for deburring of cutting, the intermediate rolling roll is allowed to freely rotate, and the ridge angle is successively reduced. The frictional relative speed is small, and the friction of the annular projection is significantly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of an implementation device of the present invention.

FIG. 2 is a plan view showing a processed state of a thin metal plate in each part.

FIG. 3 (a) is a partially enlarged view of the AA cross section in FIG. (B) Similarly, a partially enlarged view of the BB cross section in FIG. 2. (C) Similarly, a partially enlarged view of the C-C cross section in FIG. 2. (D) Similarly, a partially enlarged view of the DD cross section in FIG. 2. (E) Similarly, an enlarged cross-sectional view of the wire rod.

FIG. 4 is an enlarged front view showing the set state of the separation plate.

FIG. 5 is a partially enlarged view showing the plastic deformation of the material when the separated metal wire rod is applied to the first rolling roll for forming.

FIG. 6 (a) is a partially enlarged cross-sectional view of conventional roll forming. (B) A partially enlarged cross-sectional view of the same molding.

[Explanation of symbols]

 1 Titanium thin plate 2, 4, 5 Rolling roll 3 V groove 6 Separation plate 7 Wire rod 8 Winding reel 11 Pinch roll

Claims (6)

(57) [Claims] 1. A cross section perpendicular to the centerline of an elongated material, having parallel sides of a predetermined width at the top and bottom, and sloping surfaces made up of a plurality of broken lines on the left and right sides of the parallel sides so as to have a vertically symmetrical cross section. A metal wire rod characterized by. 2. A thin plate material is pressure-formed from above and below by a rolling roll to form a V groove symmetrically in the vertical direction, and adjacent wire rods separated by the groove portion of the thin plate material are alternately formed on one surface of a separation plate having an acute angle or A method for producing a metal wire rod, which is characterized in that the metal wire rod is alternately drawn to the other surface. 3. A thin plate material is pressure-formed from above and below by a rolling roll to form V grooves vertically symmetrically, and alternately in the vertical direction in front of the V groove forming portion with an interposed separation plate having an acute angle. In the method for producing a metal wire rod to be separated, the V groove is formed by a plurality of freely rotating rolling rolls, and the V groove angle is decreased as the depth becomes deeper. 4. An apparatus for forming a large number of V-grooves on a thin metal plate in parallel by rolling rolls and cutting the V-grooves to form metal wire rods, wherein a pinch roll arranged in front of the final rolling roll is used. An apparatus for manufacturing a metal wire, characterized in that a separation plate having an acute angle is erected at a central portion on a drawing side of the metal wire so that a sharp edge thereof is close to a pinch roll. 5. The metal wire rod according to claim 4, wherein a plurality of sets of rolling rolls are installed in parallel, and only the first set of rolling rolls is driven and the other sets of rolling rolls are freely rotated. Manufacturing equipment. 6. A plurality of sets of rolling rolls are installed in parallel, and the angle of the V-shaped annular ridge of the first rolling roll is maximized, and the angle of the V-shaped annular ridge of the subsequent rolling roll is made smaller successively. The apparatus for manufacturing a metal wire according to claim 4, which is characterized in that.