JP2021171769A - One-sided deformed wire, and one-sided deformed wire manufacturing method - Google Patents

Abstract

To provide a one-sided deformed wire which becomes an original material when manufacturing a component, of which a width differs as approaching a tip from a base end, of which one edge in a longitudinal direction is so made as to be horizontal linear along a longer direction, of which the other edge is so made as to be inclined linear or non-linear (linear with curve and step), and to provide a one-sided deformed wire manufacturing method.SOLUTION: A one-sided deformed wire 1 is long and has a rectangular cross section. When locating the wire 1 so that the wire is oriented in a horizontal direction, an edge 2 on one side in a width direction of the wire 1 becomes a reference straight line L, and an edge 3 on the other side in the width direction of the wire 1 becomes "an inclined straight line" or "a curve" with respect to the reference straight line L.SELECTED DRAWING: Figure 1

Description

The present invention relates to a long, strip-shaped square wire rod having a shape in which one edge in the left-right direction and the other edge are different in the longitudinal direction, and a method for manufacturing the same.

In a wire rod factory, a long wire rod having a desired cross-sectional shape is manufactured by continuously rolling the original coil material in a rolling equipment. When manufacturing a wire rod having a square shape (flat shape) with a cross section perpendicular to the longitudinal direction, for example, there is a procedure as shown in FIG. 4 of Patent Document 1.
As shown in FIG. 4 of Patent Document 1, a round rolled material is rolled into a substantially flat shape under pressure in the vertical direction (see (a) of FIG. 4). Next, the rolling material is pressed from the side by changing the rolling direction by 90 ° to roll it into a flat shape (see (b) in FIG. 4). Further, the rolling direction is changed by 90 ° and the rolling is performed into a thin flat shape under the rolling direction (see (c) of FIG. 4). Further, the rolling material is pressed from the side by changing the rolling direction by 90 ° to roll into a narrow flat shape (see (d) in FIG. 4). Then, the rolled material is pulled out to produce a long, strip-shaped wire rod having a flat cross section.

Japanese Unexamined Patent Publication No. 2008-018468 (Fig. 4)

The flat and strip-shaped wire rod as described above is used as a base material for manufacturing, for example, a snap ring (C type, E type, etc.).
For example, in manufacturing a snap ring, first, a flat and strip-shaped wire rod is cut to a predetermined length and curved so that one end and the other end face each other to produce, for example, a C-shaped ring member. Next, the width is adjusted by press working so that the widths of one end and the other end of the C-shaped ring member are narrowed and the width of the intermediate portion (curved portion) is widened. Then, after the press working, the ring member is heat-treated to obtain a product. In this way, the snap ring and the like are manufactured.

However, when a snap ring or the like is manufactured by a conventional manufacturing method, not only a process such as press working is inevitably required, but also a part of the ring member is cut off at the time of press working. The cut-off part becomes scrap wood and is disposed of. When mass-produced, the amount of offcuts increases, causing material loss.
By the way, when narrowing the width of a flat and strip-shaped wire, it is pressed from both the left and right to roll it into a narrow flat shape. It becomes. However, the tapered wire may not be suitable depending on the purpose such as the shape of the parts to be adopted, and conversely, a wire having a flat surface on only one side in the left-right direction may be required. There are situations where it is difficult to apply with wire rods.

Therefore, in view of the above problems, in view of the above problems, in a wire rod as a base material for manufacturing a part, the width is different from the base end to the tip end of the wire rod, and one edge in the left-right direction is along the longitudinal direction. Provided is a method for manufacturing a one-sided deformed wire rod having a horizontal straight line shape and the other edge having an inclined straight line shape or a non-straight line shape (a linear shape with a curved line or a step) along the longitudinal direction, and a one-sided deformed wire rod. The purpose is.

In order to achieve the above object, the following technical measures have been taken in the present invention.
The one-sided deformed wire according to the present invention is a long and rectangular cross section, and when the wire is arranged so as to face the horizontal direction, one edge in the width direction of the wire is a reference straight line. The other edge of the wire rod in the width direction is a "sloping straight line" or a "curve" with respect to the reference straight line.

Preferably, the other side edge is formed so that the dimension in the width direction of the wire rod changes by changing the interval with respect to the one side edge.
Preferably, the wire rod has a flat shape having a wide cross-sectional shape with respect to the thickness and a strip shape.
In the method for producing a one-sided deformed wire according to the present invention, a long original wire is rolled using a rolling mill. The original wire is rolled so that one edge of the original wire is in contact with the flat surface portion of the flat die and the other edge of the original wire is in contact with the work roll. Passing between the work roll of the machine and the flat die, and while the original wire is passing, the work roll is separated from the flat die in close proximity to process the original wire into the one-sided deformed wire. It is characterized by.

Preferably, the original wire material may pass between the work roll and the flat die in a cold state.

According to the one-sided deformed wire rod and the method for manufacturing the one-sided deformed wire rod of the present invention, the width of the wire rod that is the base material for manufacturing the part differs from the base end to the tip of the wire rod, and one of the left and right directions. The edge is horizontally straight along the longitudinal direction, and the other edge is inclined straight or non-linear (curved or stepped linear) along the longitudinal direction.

It is a figure which showed the outline of the manufacturing method of the one-sided deformed wire rod of this invention schematically. It is a figure which showed the outline of the manufacturing method of the one-sided deformed wire rod of this invention schematically. It is a top view which schematically showed the outline of the manufacturing method of the one-sided deformed wire rod of this invention. It is a top view which schematically showed the outline of the one-sided deformed wire rod of this invention.

Hereinafter, embodiments of the one-sided deformed wire rod 1 and the method for manufacturing the one-sided deformed wire rod 1 according to the present invention will be described with reference to the drawings.
It should be noted that the embodiments described below are examples that embody the present invention, and the specific examples do not limit the configuration of the present invention.
The one-sided deformed wire rod 1 according to the present invention is, for example, a flat and long wire rod used when manufacturing a snap ring (C type, E type, etc.) or the like. The one-sided deformed wire rod 1 of the present invention is not limited to a snap ring or the like, and is a member that can be used when manufacturing parts for mechanical products and electric products. Further, the original wire 6 of the one-sided deformed wire 1 of the present invention is not limited to iron metals such as steel, and non-ferrous metals such as copper and aluminum can also be mentioned.

The one-sided deformed wire rod 1 of the present invention is a long wire rod having a rectangular cross section (flat shape). The one-sided deformed wire rod 1 has an edge 2 (long edge) on one side facing the longitudinal direction, an edge 3 (long edge) on the other side facing the edge 2 on one side thereof, a width edge 4 at the front end, and a rear edge. It is a member having a width edge 5 at an end and having a substantially rectangular shape in a plan view. It should be noted that the above-mentioned "rectangular cross section" includes those with rounded corners (with R).

The edge 2 on one side is a long edge extending from the width edge 4 at the front end to the width edge 5 at the rear end, and is a parallel long edge that does not intersect with a straight line extending straight in the horizontal direction (horizontal line, reference straight line L described later). Is.
The edge 3 on the other side is a long edge extending from the width edge 4 at the front end to the width edge 5 at the rear end, and is a long edge of a line in a direction intersecting (intersecting direction) with respect to a straight line drawn in the horizontal direction. .. That is, the edge 3 on the other side is a "straight line that slopes" or a "curve" with respect to the horizontal line.

In manufacturing the one-sided deformed wire rod 1 of the present invention, first, a long original wire rod 6 (rolled material) having a substantially circular cross section is rolled to form a rectangular cross section (flat shape). To process. In the present embodiment, the cross section is a cross section cut in a direction (vertical direction) orthogonal to the longitudinal direction of the long wire rod.
Specifically, a long original wire 6 (coil material) wound around a drum in a coil shape is unwound from the drum and introduced into a rolling apparatus. The original wire 6 has a substantially circular cross section. The material of the original wire 6 is, for example, steel, copper, aluminum, or the like.

The above rolling apparatus includes a pair of upper and lower rolling rolls (work rolls). By rolling the rolling roll, the base material is rolled from a substantially circular shape to a substantially elliptical shape with the upper and lower surfaces flat and the left and right side surfaces curved.
The substantially elliptical original wire rod 6 is introduced into a downstream rolling mill. This rolling apparatus includes a pair of left and right rolling rolls (work rolls). By rolling from the side of the rolling roll, the original wire rod 6 is processed from a substantially elliptical shape to a rectangular shape in which the left and right surfaces are flat.

By repeating the rolling by the upper and lower rolling rolls and the rolling by the left and right rolling rolls, a desired rectangular (flat shape) cross-sectional shape is obtained, and the edge 2 on one side and the edge 3 on the other side in the width direction are formed. The original wire rod 6 drawn on the linear edge along the transport direction (pass line) is formed. That is, in the rolling process up to this point, the original wire 6 in which the edge 2 on one side and the edge 3 on the other side are aligned in parallel and straightly drawn is manufactured.

Subsequently, as shown in FIGS. 1 to 3, the original wire rod 6 having a rectangular cross section (flat shape) and a long original wire 6 is drawn and rolled. By this pultrusion rolling, the one-sided deformed wire rod 1 of the present invention can be finished. The black arrows shown in FIGS. 1 to 3 and the like are the transport directions (pass lines).
The straightly drawn original wire 6 is introduced into the finishing rolling mill 7. The rolling mill 7 is configured such that the work roll 8 and the flat die 9 are arranged so as to face each other. The flat die 9 is fixed to the rolling mill 7. The work roll 8 is movable in a direction orthogonal to the transport direction, and is configured to be close to and separated from the flat die 9 (see the arrows in both directions in white in FIGS. 1 to 3). The work roll 8 may be a drive roll or a free roll.

For example, as shown in FIG. 1, the finishing rolling mill 7 includes a flat die 9 having a work roll 8 and a flat surface portion 10 provided with a flat surface portion 10 having a constant size on a surface in contact with the original wire rod 6 in the transport direction. They are deployed facing each other.
Further, as shown in FIG. 2, in the finishing rolling mill 7, a work roll 8 and a grooved flat die 9 having a groove 11 formed on a surface in contact with the original wire 6 are arranged so as to face each other. The groove portion 11 of the grooved flat die 9 is formed along the transport direction, and the original wire rod 6 is slidably fitted and guided in the transport direction.

Regarding FIG. 2, the work roll 8 may be provided with a groove portion along the transport direction. That is, the rolling mill 7 may have a structure in which the groove portion 11 of the flat die 9 and the groove portion of the work roll 8 are arranged so as to face each other. That is, if the work roll 8 and the flat die 9 face each other, various combinations are possible.
The original wire 6 is pulled out so that the edge 2 on one side of the original wire 6 is in contact with the flat surface portion 10 of the flat die 9 and the edge 3 on the other side of the original wire 6 is in contact with the work roll 8. By passing between the work roll 8 and the flat die 9 and separating the work roll 8 from the flat die 9 while passing through the original wire 6, the original wire 6 is processed into a one-sided deformed wire 1. ..

Preferably, the original wire 6 is rolled by pulling out between the work roll 8 and the flat die 9 in a cold state. Preferably, the wire rod (original wire rod 6) is a flat wire rod having a cross-sectional shape wider than the thickness and is drawn in a strip shape. That is, the original wire rod 6 is a "flat strip plate" having a flat cross section and a strip-shaped wire in the longitudinal direction.
For example, when the original wire rod 6 having a length of about 1 m, a width of about 10.0 mm, and a thickness of about 2.5 mm is pulled out to manufacture a one-sided deformed wire rod 1, it is 0.5 mm with one reduction (pressing). The work roll 8 is brought close to the flat die 9 so as to be narrowed. That is, the distance between the work roll 8 and the flat die 9 is set to 9.5 mm, and the work roll 8 is pressed against the original wire 6 for a certain period of time. The width of the original wire 6 is 9.5 mm.

Further, the work roll 8 is brought close to the flat die 9 so as to be narrowed by 0.5 mm by one reduction (pressing). That is, the distance between the work roll 8 and the flat die 9 is set to 9.0 mm, and the work roll 8 is pressed against the original wire 6 for a certain period of time. The width of the original wire 6 is 9.0 mm. This is repeated 6 times at regular intervals, and the width of the rear end side is drawn to about 7.0 mm to manufacture the one-sided deformed wire rod 1.

In this one-sided deformed wire rod 1, the edge 2 on one side becomes a straight line parallel to the transport direction by the flat die 9, and the edge 3 on the other side is the width of the wire due to the proximity of the work roll 8 to the flat die 9. Is processed into a shape that gradually narrows. The width of the front end of the one-sided deformed wire 1 is about 10.0 mm, the width of the wire is gradually narrowed, and the width of the rear end is about 7.0 mm.

In this way, when the original wire rod 6 is pulled out between the work roll 8 and the flat die 9 and rolled, the edge 2 on one side is along the flat die 9, so that the edge 2 on one side is parallel to the transport direction. The work roll 8 repeatedly approaches and separates from the edge 3 on the other side, so that the edge 3 on the other side is deformed and the width dimension increases as it advances in the transport direction. A one-sided deformed wire rod 1 having a changing edge is formed.

By the way, the relationship between the work roll 8 and the flat die 9 may be as follows.
For example, the length of the flat surface portion 10 of the flat die 9 in the transport direction may take into consideration the material, cross-sectional shape, and the like of the original wire rod 6. In addition, the diameter of the work roll 8, the force and speed at which the work roll 8 is pressed (see the white arrows in FIGS. 1 to 3), the speed at which the original wire 6 is pulled, the material of the original wire 6, the cross-sectional shape, etc. Should be taken into consideration.

However, if the length of the flat die 9 is too long, the resistance between the flat die 9 and the original wire increases, and the force for pulling the original wire 6 increases. On the other hand, if the length of the flat die 9 becomes too short, the surface pressure of the flat die 9 with respect to the original wire rod 6 becomes large (close to point contact). That is, since the flat die 9 holds the original wire 6 on the surface, the original wire is considered in consideration of the relationship between the work roll 8 and the flat die 9 so that the surface pressure of the flat die 9 with respect to the original wire 6 is low. The resistance when pulling 6 becomes small. In other words, there is a desirable dimensional relationship and surface pressure relationship between the work roll 8, the flat die 9, and the original wire rod 6.

The one-sided deformed wire rod 1 of the present invention is a long wire rod having a rectangular cross section, and when the wire rod 1 is arranged so as to face the horizontal direction, the one-sided edge in the width direction of the wire rod 1 2 is a reference straight line L, and the edge 3 on the other side of the wire rod 1 in the width direction is a “straight line inclined” or a “curve” with respect to the reference straight line L.
In the present embodiment, the reference straight line L is a straight line parallel to the transport direction (pass line).

It is preferable that the one-sided deformed wire rod 1 is formed so that the dimension of the wire rod in the width direction changes by changing the distance between the edge 3 on the other side and the edge 2 on the one side.
However, the one-sided deformed wire rod 1 does not include a tapered shape in which the edge 2 on one side and the edge 3 on the other side gradually approach each other with respect to the transport direction (pass line).
The one-sided deformed wire rod 1 of the present invention has, for example, a shape as shown in FIG. The two-dot broken line shown in FIG. 4 is a line indicating the shape of the original wire rod 6.

In the first example, the one-sided deformed wire rod 1 shown in FIG. 4A is a long straight edge in which the edge 2 on one side is parallel and straight along the transport direction (reference straight line L) in a plan view. The wire drawing material is a straight long edge in which the side edge 3 is inclined toward the one side edge 2.
That is, the one-sided deformed wire rod 1 of the first example is a trapezoidal wire rod whose width gradually narrows from the width edge 4 at the front end toward the width edge 5 at the rear end. In this first example, the linear inclination of the edge 3 on the other side is continuous.

In the second example, the one-sided deformed wire rod 1 shown in FIG. 4B is a long straight edge in which the edge 2 on one side is parallel and straight along the transport direction (reference straight line L) in a plan view. The edge 3 on the other side is a wire drawing material which is a long edge in a staircase shape whose width narrows to the edge 2 on the one side.
That is, the one-sided deformed wire rod 1 of the second example is a wire rod having step portions 12 whose width becomes narrower at regular intervals from the width edge 4 at the front end toward the width edge 5 at the rear end. Regarding this second example, the inclination of the staircase shape of the edge 3 on the other side is discontinuous. Further, with respect to the edge 3 on the other side, the inclination of the staircase shape becomes a straight line that inclines when the start point and the end point are connected.

The third example, the one-sided deformed wire rod 1 shown in FIG. 4C, has a straight long edge in which the edge 2 on one side is parallel and straight along the transport direction (reference straight line L) in a plan view. The edge 3 on the other side is a wire drawing material which is a long edge having a shape in which the width is widened from the front end to the middle portion in the longitudinal direction and then narrowed to the rear end.
That is, the one-sided deformed wire rod 1 of the third example is a convex wire rod that swells from the width edge 4 at the front end to the middle portion in the longitudinal direction and then gradually narrows toward the width edge 5 at the rear end.

Regarding the fact that the edge 3 on the other side is curved, although not shown, for example, a wave shape that meanders while repeatedly increasing and decreasing in width can be mentioned. Further, the edge 3 on the other side may be an "inclined curve" with respect to the reference straight line L.
According to the one-sided deformed wire rod 1 and the method for manufacturing the one-sided deformed wire rod 1 of the present invention, the width of the wire rod used as a base material for manufacturing a part is different from the base end to the tip of the wire rod, and the width is different in the left-right direction. One edge is horizontal straight along the longitudinal direction, and the other edge is inclined straight or non-linear (curved or stepped linear) along the longitudinal direction.

That is, the one-sided deformed wire rod 1 of the present invention is manufactured by drawing rolling using a rolling mill having a structure in which the work roll 8 and the flat die 9 are arranged facing each other, and one side edge of the original wire rod 6. The original wire 6 is passed between the work roll 8 and the flat die 9 so that the 2 is in contact with the flat surface portion 10 of the flat die 9 and the other edge 3 of the original wire 6 is in contact with the work roll 8. While the wire rod 6 is passing, the work roll 8 is moved away from the flat die 9 in close proximity to the flat die 9, and the long original wire rod 6 is rolled (drawn) to produce a wire drawn rod having a deformed shape on only one side. NS.

The one-sided deformed wire rod 1 of the present invention can be used as a base material when manufacturing various parts. For example, when a snap ring or the like is manufactured using the one-sided deformed wire rod 1 according to the present invention, the number of steps (pressing step) can be reduced by one. Further, if the one-sided deformed wire rod 1 of the present invention is used, it can be incorporated even if the space inside the component is narrow, and the size of the component can be reduced.

It should be noted that the embodiments disclosed this time are exemplary in all respects and are not considered to be restrictive.
In particular, in the embodiments disclosed this time, matters not specified, such as operating conditions, operating conditions, dimensions and weights of components, do not deviate from the range normally practiced by those skilled in the art, and are normal. If you are a person skilled in the art, you are adopting items that can be easily assumed.

1 Deformed wire on one side 2 Edge on one side 3 Edge on the other side 4 Width edge at the front end 5 Width edge at the rear end 6 Original wire 7 Roller 8 Work roll 9 Flat die 10 Flat surface 11 Groove 12 Step L Reference straight line

Claims (5)

A long wire with a rectangular cross section
When the wire rod is arranged so as to face the horizontal direction, one edge in the width direction of the wire rod is a reference straight line.
A one-sided deformed wire rod characterized in that the other edge in the width direction of the wire rod is a "sloping straight line" or a "curve" with respect to the reference straight line. The one-sided variant according to claim 1, wherein the other side edge is formed so that the dimension in the width direction of the wire rod changes by changing the interval with respect to the one side edge. wire. The one-sided deformed wire rod according to claim 1 or 2, wherein the wire rod has a flat shape having a wide cross-sectional shape with respect to the thickness and a strip shape. In producing the one-sided deformed wire according to any one of claims 1 to 3, by rolling a long original wire using a rolling mill.
The rolling mill is configured such that the work roll and the flat die are arranged facing each other.
The original wire is placed on the work roll of the rolling mill and the flat die so that one edge of the original wire is in contact with the flat surface portion of the flat die and the other edge of the original wire is in contact with the work roll. Manufacture of a one-sided deformed wire, characterized in that the original wire is processed into the one-sided deformed wire by passing through a space and causing the work roll to move away from the flat die while passing through the original wire. Method. The method for producing a one-sided deformed wire according to claim 4, wherein the original wire passes between the work roll and the flat die in a cold state.

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