WO2015106609A1

WO2015106609A1 - Heterogeneous metal wire for use in multi-wire cutting, manufacturing method for same, and preparation method therefor

Info

Publication number: WO2015106609A1
Application number: PCT/CN2014/093153
Authority: WO
Inventors: 钱海鹏
Original assignee: 凡登（常州）新型金属材料技术有限公司
Priority date: 2014-01-19
Filing date: 2014-12-05
Publication date: 2015-07-23
Also published as: CN104084443A; CN104084443B

Abstract

A heterogeneous metal wire (1) for use in multi-wire cutting, comprising two or more sets of heterogeneous parts. Each heterogeneous part consists of a curled part (12) and a twisted part (11). The axes of metal wires in the curled part are on a same plane. The axes of metal wires in the twisted part do not share any plane. The axes of the metal wires of the curled parts of a same set of heterogeneous part are within a same plane. The diameter of an outer envelope is 1.05-1.65 times of the average diameter of the metal wire itself. Also related are an apparatus and method for manufacturing the heterogeneous metal wire for use in multi-wire cutting. The heterogeneous metal wire is provided with a solid multidimensional structure, thus further improving cutting performance at an equal kerf loss; the structural retention capability of the heterogeneous metal wire is also further enhanced, thus facilitating reduced risks of cutting yield fluctuations.

Description

Heterogeneous metal wire for multi-wire cutting, manufacturing device thereof and preparation method thereof

Technical field

The invention relates to an isomerized metal wire for multi-wire cutting, a manufacturing device thereof and a preparation method thereof, which are suitable for multi-wire cutting of hard materials such as crystalline silicon, silicon carbide, sapphire, crystal and the like.

Background technique

In most cases, multi-wire cutting is based on high-strength wire, which carries super-hard abrasives in high-speed motion and high-hard materials (such as crystalline silicon, silicon carbide, sapphire, crystal, etc.) through abrasives. Rolling and grinding to achieve cutting. This method has become the main production mode with the advantages of high cutting efficiency, small cutting kerf, less material loss, high cutting precision and good surface quality. Among them, the wire as the carrier carrying the abrasive, the stability during the cutting process and the ability to carry the abrasive, play an extremely important role in cutting efficiency and product quality.

The currently widely used wire is a circular structure with a smooth surface, which has the outstanding advantage that the wire can uniformly carry the abrasive in the direction around which the cutting feed is carried, thereby providing a stable cutting surface quality. In general, the surface area of the wire can be increased by increasing the diameter of the wire, thereby enhancing the ability of the wire to carry the abrasive to increase the cutting efficiency at the expense of increasing the width of the kerf, resulting in material loss during the cutting process. Increase. The improvement of cutting efficiency can also be achieved by increasing the average particle size of the abrasive and the sharpness of the edges.

At the same time as the multi-line cutting was born, efforts to improve the abrasive carrying capacity of the wire (saw line) have begun and continue to this day, typically divided into three categories:

The first type is to try to make rough wire and increase the wire by increasing the roughness of the wire surface. Abrasive carrying capacity. For example, JP2007 196312 proposes that the surface of the wire is uneven by spraying the electrolyte onto the surface of the wire; WO 9/12670 proposes a micro-cavity wire, a soft surface wire, and a metal whose cross-section changes along the length direction. A concept such as wire; KR 2001 002689 describes a circular saw wire on which a cavity is formed by embossing. Such attempts have not yet been successfully implemented and applied in the field of multi-wire cutting. The core reason is that the abrasive itself has a strong wear capacity. The surface of the wire treated as described above will be polished shortly after entering the cutting process. The surface treated wire no longer differs from the conventional round surface smooth wire.

The second type of attempt is based on the spiral treatment of the wire. For example, JP 2007 044841 proposes a substantially circular saw wire having a flat surface extending helically around the length of the saw wire, CN102380915A being essentially a natural extension of the above concept; US 2860862 is proposed to be pre-flattened The shape of the saw wire applies two helical deformations: first twisting the inner axis of the flat saw wire with a short lay length, and then twisting the saw wire with a longer lay length in a spiral shape. FR 750081 also describes spiral sawing wires with a circular or polygonal cross section. CN102205563A and CN102765141A are basically all natural extensions of the aforementioned ideas. JP 4057666 describes a metal saw wire, which is also twisted into a spiral shape by twisting, and then stretched by a die. So far, the above efforts have not seen successful industrial implementation and application in the field of multi-wire cutting. The core reason is that the spiraling of the wire inevitably requires the twisting of the wire, thereby giving the metal ribbon a high twist. Internal stress, and the longer the wire, the higher the torsional internal stress, which leads to a strong self-winding tendency of the finished wire, which cannot be practically applied to multi-line cutting, which is difficult to complete the uniform long-distance winding take-up line. It is impossible or difficult to wire on the cutting line. Even if it is used for short-distance cutting, the wire will be irregularly shaken due to the high torsional internal stress carried by the wire itself, resulting in unacceptable cutting effect (exposed as surface line). Traces are bad with TTV).

A third type of attempt is to make so-called "structural wires" by bending the wires in one or more planes. For example, in JP 2004 276207, in which a deformed single wire or strand having a spiral shape is described, it is also described that the single wire or strand is guided through a pair of cogwheels to form a zigzag double wrinkle in a single plane. In the zigzag fold, the saw wire is first bent in the first direction, then the second bend is made in the second direction and opposite to the first direction (reverse bend), and then the strand is twisted and twisted The zigzag folds of length are superimposed on the long wave spiral. A significant drawback of this type of attempt is that the stranded structure results in a significant increase in the outer diameter of the utility envelope of the saw wire, resulting in unacceptable kerf widening and corresponding additional material loss.

A third type of attempt has achieved a certain application success. It is a monofilament type metal saw wire disclosed by Ansel Mittal through Chinese patent CN100475398C, which performs wire on two or more planes. The bending, thereby enhancing the ability of the wire to carry the abrasive to a certain extent, can achieve good results in some specific application environments. The disadvantage is that the bending of the saw wire is dominated by one plane, and the bending of other planes is gradually turned to the dominant plane during the cutting process, and finally a saw wire which is deformed substantially in only one plane is formed, thereby resulting in good cutting. The rate fluctuates, and at the same time, due to the limited structural retention of the saw wire, in the case of a long cutting path, the bending structure has substantially or largely disappeared when the cutting line reaches the cutting end, resulting in a lower cutting yield than the cutting starting end. The yield has dropped significantly. In order to try to solve the above defects, Bekaert proposed a product concept equivalent to the second type ("spiral wire") and the third type ("structural wire") through CN102528940A. The basic principle is that it is single. The wire is bent on the plane by a bite gear (or other deformation device) by twisting the wire (rotating the plane of the wire around the axis of the wire, or keeping the plane of the deforming device stationary but rotating synchronously) Receiving and releasing the bobbin), forming a spiral wire, and then unwinding the wire (rotating the plane of the deformation device opposite to the twisting direction, or keeping the plane of the deforming device still but The reverse synchronous rotation of the receiving and unwinding shaft) partially or completely releases the torsional internal stress caused by the twisting of the wire. In the implementation, it was found that the wire produced was not improved in comparison with the method provided by CN100475398C in terms of the uniformity of the surrounding axis and the structural retention ability because of the necessary untwisting. Both CN102962901A and CN102310489A are natural extensions in the concepts of CN100475398C and CN102528940A, and no independent technical contributions have been made.

As the industry continues to reduce costs and increase efficiency, multi-line cutting is increasingly using longer workpieces (silicon rods, etc.), finer cutting wire (0.08mm-0.115mm), resulting in longer cutting paths Further limits the scope of application of the above conventional structural lines.

Summary of the invention

The technical problem to be solved by the invention is to improve the ability of the wire to carry the abrasive during the cutting process, and at the same time to solve the problem that the traditional planar crimped structural wire has a risk of falling tail yield due to the lack of structural retention.

The technical solution adopted by the present invention to solve the technical problem thereof is: a heterogeneous metal wire for multi-wire cutting,

1) comprising two or more groups of isomers, each of which is composed of a curled portion and a twisted portion, the wire axis z in the curled portion is on the same plane, and the wire axis z in the twisted portion does not share any Plane; the wire axis z of the curl of the same set of isomers is in the same plane;

2) The outer diameter D is 1.05-1.65 times the average diameter d of the wire itself, and the outer diameter D is measured in the free state of the wire and can be observed by a contour projector.

Due to the presence of the twisted portion, the heterogeneous wire has a surface solid structure compared to the straight wire, which obviously leads to an enhanced abrasive carrying capacity; compared with the conventional curved steel wire of the plane bending, the heterogeneous steel wire In addition to the plane curl, the twisted portion that no longer shares any plane is added, and the three-dimensional structure of the steel wire is more complicated, and the sand-carrying ability is further enhanced. At the same time, because of the existence of twisted isomerism and the deformation strengthening during the heterogeneous molding process, the heterogeneous steel wire has a stronger structural retention ability than the conventional structural steel wire. Similar to the traditional structural steel wire, increasing the outer diameter of the heterogeneous steel wire can improve the sand carrying capacity (indicating the improvement of cutting efficiency), but under the typical thin wire / high tension / long cut combination, too large The diameter of the outer envelope also leads to the easy disappearance of the structure of the heterogeneous wire, which increases the risk of line marks and poor TTV during the cutting process (ie, the stability of the cutting yield decreases); If the diameter of the outer envelope of the steel wire is too small, it will bring about an insignificant improvement in the sand-bearing capacity compared with the ordinary straight steel wire. A large amount of experimental evidence indicates that depending on the process, equipment and raw materials in the manufacturing process of heterogeneous lines, as well as the cutting environment, process and equipment of the client, the diameter of the outer diameter of the heterogeneous steel wire D has considerable choice. However, the diameter W of the outer envelope generally limited to the isomerized wire is 1.05-1.65 times the average diameter d of the wire itself.

The surface of the twisted portion has a wear-resistant region; the wear-resistant region has a higher hardness than other regions.

The hardness of the wear-resistant zone reaches a local maximum at the apex or bottom point of the twisted portion, or the region immediately adjacent to the apex or bottom point.

Due to the uneven distribution of surface hardness and the highest hardness and the highest wear resistance of the apex or bottom point and/or the adjacent area of the isomer, the surface stereostructure of the heterogeneous line will be in the process of wear due to the wire along the cutting process. A certain degree of "self-healing repair" is produced to facilitate maintaining yield consistency from the cutting start end to the cut end.

In order to make the heterogeneous wire as uniform as possible to carry the abrasive around the feed direction, the planes of the crimps of the different sets of isomers intersect at the outer centerline of the heterogeneous line.

In order to make the heterogeneous wire as uniform as possible to carry the abrasive around the feed direction, it is preferred that the planes at which the curled portions of the respective isomers are located intersect each other, and the adjacent angles between the planes are equal. The steel wire is more isotropic.

The present invention is directed to precision multi-wire cutting that is demanding to reduce kerf loss, and the average diameter d of the wire is between 0.08 mm and 0.40 mm. The wire may be provided with one or more layers of metal or alloy plating, the average diameter d of the wire comprising the thickness of the coating.

In order to improve the sand-carrying capacity by using the three-dimensional twisted structure as much as possible, the distance between two adjacent vertices or two adjacent bottom points of the same isomer portion of the heterogeneous wire is generally designed to be smaller than the average diameter of the isomerized wire. 200 times.

A manufacturing device for fabricating the above-mentioned heterogeneous metal wire, comprising at least a wire reel, a pre-deformation mechanism for deforming a bus bar of a heterogeneous wire in two planes or a plurality of planes, a forward direction of the pre-deformed wire, and a heterogeneous molding mechanism for plastically deforming a pre-deformed wire in a direction of advancing in a direction, a pulling drive wheel for pulling a pre-deformed wire to provide sufficient drawing tension through a heterogeneous molding mechanism, a wire-retracting constant tension system, and a wire take-up device The busbar of the isomerized metal wire is a raw material for preparing an isomeric metal wire.

The pre-deformation mechanism causes the wave height H of each pre-deformed wire in the plane to be between 105% and 300% of the average diameter of the bus bar, the wave height H being the highest point of the wire after pre-deformation in the pre-deformation plane The outer diameter of the outer envelope formed at the lowest point along the direction of travel of the wire. The pre-deformation mechanism may be a pressure roller having a pre-deformed shape on the surface, and the wave height of the pre-deformation of the wire is controlled by changing the shape of the pre-deformation, the depth of penetration between the pressure rollers, and the like.

In order to ensure the effect of subsequent heterogeneous molding while controlling the risk of wire breakage during isoform molding, it is preferred that the pre-deformation mechanism is such that the wave height H of the pre-deformed wire in each plane is between 150% and 200% of the average diameter of the bus bar. .

In order to further improve the torsional effect of the pre-deformed metal wire in the heterogeneous molding mechanism, the apparatus for manufacturing the heterogeneous wire further includes a winding wheel located before the heterogeneous molding mechanism, and the axis of the winding wheel and the axis of the pulling drive wheel There is an angle between them.

Further, in particular, the heterogeneous molding mechanism is a cylindrical drawing die, and the cylindrical drawing is performed. The mold comprises at least a cylindrical sizing belt having an inner diameter smaller than the diameter of the isomerized metal bus bar to ensure sufficient deformation strengthening during the heterogeneous molding process to produce hardness isomerism on the surface of the wire.

In most cases, the above-described cylindrical drawing die further includes a tapered inlet whose inner diameter gradually decreases from the outside to the inside, and the inner diameter of the sizing belt coincides with the minimum inner diameter of the tapered inlet.

The heterogeneous molding mechanism includes a cylindrical drawing die having an inner diameter of 90% to 99%, preferably 95% to 99% of the diameter of the bus bar. At this time, the structural stability and hardness distribution of the wire are optimized.

The heterogeneous molding mechanism includes at least two cylindrical drawing dies, and the inner diameter of the sizing tape of the different cylindrical drawing dies is sequentially changed from the busbar to the direction of the winding, and the inner diameter of the smallest sizing tape is the diameter of the busbar. 90%-99%. At this time, the structural stability and hardness distribution of the wire are optimized.

In order to further improve the torsional effect of the pre-deformed metal wire in the heterogeneous molding mechanism, the apparatus for manufacturing the heterogeneous metal wire further comprises a driving device for driving the sizing axis of the cylindrical drawing die around the sizing axis of the cylindrical drawing die .

A method for preparing the apparatus for producing an isomeric metal wire comprises at least the following steps:

1) Pre-deformation: the busbar of the heterogeneous wire is passed through the reel, and then enters the pre-deformation mechanism for pre-deformation processing, and the pre-deformed wire deformed in two planes or a plurality of planes is processed, and each plane is ensured. The wave height H of the inner pre-deformed wire is between 105% and 300% of the average diameter of the bus bar, and the wave height H is formed along the traveling direction of the wire at the highest point and the lowest point of the pre-deformed wire in the pre-deformation plane. Outer contour diameter;

2) Heterogeneous molding: pulling the driving wheel to pull the pre-deformed wire through the heterogeneous molding mechanism, the twisted internal stress accumulated by the wire itself during the process, or the additional applied metal by the winding wheel and the pulling drive wheel The twisting force of the wire, or the twisting force is applied to the wire by the rotation of the axis of the sizing belt by the heterogeneous forming mechanism, and the pre-deformed wire is plastically deformed in the advancing direction and the direction of advancing to form an isomerized wire;

3) Wire-receiving: The heterogeneous wire is then wound up by the wire tensioning system and the wire-receiving device.

The heterogeneous metal wire for multi-wire cutting of the present invention forms a more complex three-dimensional multi-dimensional structure of the planar curved structural wire by isoform molding, so the cutting performance is further improved than the conventional structural line under the same kerf loss. Because of the existence of heterogeneous distortion and the deformation strengthening caused by the heterogeneous molding process, the ability of the isomeric metal to maintain the structure during the cutting process is superior to the conventional structural line, which is beneficial to reduce the risk of cutting yield fluctuation.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of the metal ribbon of the heterogeneous molding of the present invention having two pre-deformed planes A and B.

Fig. 2 is a schematic perspective view showing the structure of the heterogeneous metal wires of Examples 1 to 4 of the present invention.

Fig. 3 is a schematic perspective view showing the structure of an isomer in an isomerized metal wire according to Examples 1 to 4 of the present invention.

Fig. 4 is a view showing the configuration of an apparatus for producing an isomerized metal wire in the first embodiment of the present invention.

Fig. 5 is a view showing the configuration of an apparatus for producing an isomerized metal wire in a second embodiment of the present invention.

Fig. 6 is a view showing the configuration of an apparatus for producing an isomerized metal wire according to a third embodiment of the present invention.

Fig. 7 is a view showing the configuration of an apparatus for producing an isomerized metal wire according to a fourth embodiment of the present invention.

Fig. 8 is a schematic view showing the structure of a drawn cylindrical mold in the apparatus for producing an isomerized metal wire according to the present invention.

In the figure: 1, heterogeneous wire, 11, twisted portion, 12 curled portion, 2, over-wheel, 3, pre-deformation mechanism, 4, heterogeneous molding mechanism, 41, tapered inlet, 42, sizing belt, 5, the line constant tension system, 6, wire take-up device, 71, winding wheel, 72, pull drive wheel, 8, drive device, A and B, pre-deformation plane, Between α and β, the two adjacent angles between the pre-deformed planes, t, the apex of the isomer, b, the bottom of the isomer, z, the wire axis, e, the outer envelope, D, the outer envelope Diameter, d, the average diameter of the wire itself, H, wave height.

detailed description

The invention will now be described in further detail with reference to the drawings. The drawings are simplified schematic diagrams, and only the basic structure of the present invention is illustrated in a schematic manner, and thus only the configurations related to the present invention are shown.

Example 1

A first embodiment of the heterogeneous wire of the present invention as shown in Figures 2 and 3:

There are two sets of heterogeneous portions, each of which is composed of a curling portion 12 and a twisted portion 11, the wire axis z in the curling portion 12 is on the same plane, and the wire axis z in the twisting portion 11 does not share any plane. The wire axis z of the curl portion 12 of the same group of isomers is in the same plane. In this embodiment, the axis z of the curl portion 12 of a group of heterogeneous portions is located in the plane A, and the other group of the isomers The axis z of the curling portion 12 is located in the plane B; the planes A and B where the curling portions 12 of the two sets of the isomers are respectively intersected the outer centerline of the heterogeneous line; the curling portions 12 of the two sets of the heterogeneous portions are respectively located After the planes A and B intersect, the adjacent angles α and β between the planes are equal, and the isotropic of the steel wire is good.

There is a wear-resistant area on the surface of the twisted portion 11; the wear-resistant area has a higher hardness than the other areas, and both reach the local maximum at the vertex t or the bottom point b of the twisted portion 11, or the area immediately adjacent to the vertex t or the bottom point b value;

The outer envelope diameter D is 1.05 times the average diameter d of the wire 1 itself.

The isomeric wire 1 has an average diameter of 0.08 mm.

The distance between two adjacent vertices t or two adjacent bottom points b of the same group of isomers is less than 200 times the average diameter d of the isomerized wires 1.

As shown in FIG. 4, the apparatus for fabricating the isomerized metal wire of the present embodiment includes a plurality of crossing wheels 2 having an angle of rotation between the axes of rotation, and continuously changing the direction of advancement of the wire 2, and the pair of wires are in two a pre-deformation mechanism 3 for deforming the mutually perpendicular planes A and B, a heterogeneous molding mechanism 4 for plastically deforming the pre-deformed wire in the advancing direction of the pre-deformed wire and a direction of advancing and advancing, and pulling the wire The pull drive wheel 72 is provided with a sufficient drawing tension by the heterogeneous molding mechanism to take up the constant tension system 5 and the take-up device 6. The pre-deformation mechanism 3 makes the wave height H of the pre-deformed wire in each plane 105%-115% of the average diameter of the bus bar, and the wave height H is the highest point and the lowest point of the wire pre-deformed in the pre-deformation plane. The outer envelope contour diameter formed by the direction of travel of the wire. The pre-deformation mechanism is a press roll having a pre-deformed shape on the surface, and the wave height of the pre-deformation of the wire is controlled by changing the pre-deformed shape, that is, the tooth height of the surface of the press roll, or by changing the depth of press-in between the press rolls, Two sets of press rolls are used in this embodiment to achieve pre-deformation in two planes.

The heterogeneous molding mechanism 4 is a cylindrical drawing die. As shown in FIG. 8, the cylindrical drawing die includes a tapered inlet 41 and a cylindrical sizing tape 42. The inner diameter of the tapered inlet 41 is gradually reduced from the outside to the inside. The inner diameter of the sizing belt 42 coincides with the minimum inner diameter of the tapered inlet 41; the inner diameter of the sizing belt 42 is 99% of the diameter of the busbar.

A method for preparing the isomerized metal wire of the present embodiment comprises the following steps:

a) Pre-deformation: the straight metal bus bar passes through a plurality of rotation axes between the rotation axes, and continuously switches the wire-passing wheel 2 in the advancing direction of the wire, and then enters the pre-deformation mechanism 3 to perform pre-deformation processing of the wire, and processes the a pre-deformed wire deformed in two mutually perpendicular planes A and B, wherein the wave height H of the pre-deformed wire in each plane is 105% to 115% of the average diameter of the bus bar, as shown in FIG. And B is symmetrically uniform wave shape; the average diameter of the bus bar is 0.085mm.

b) Heterogeneous molding: the pulling drive wheel 72 pulls the wire through the heterogeneous forming mechanism 4, and the pre-deformed wire advances due to the torsional internal stress accumulated by the wire passing through the plurality of pulleys 2 before the pre-deformation Synchronous plastic deformation occurs in the direction of the wraparound, causing the wave shape of the pre-deformed wire to be distorted, and at the same time, a certain surface hardness isomerized due to the deformation strengthening, forming a heterogeneous portion as shown in FIGS. 2 and 3. Isomerized wire 1;

c) Take-up: The isolating wire 1 is then wound up by the take-up constant tension system 5 and the take-up device 6.

Example 2

A second embodiment of the heterogeneous wire of the invention as shown in Figures 2 and 3:

The outer envelope diameter D is 1.40 times the average diameter d of the wire 1 itself.

The average diameter d of the isomerized wire 1 is 0.11 mm.

As shown in FIG. 5, the apparatus for fabricating the isomerized metal wire of the embodiment includes the wire wheel 2 The pre-deformation mechanism 3, the winding wheel 71, which deforms the wire in two mutually perpendicular planes A and B, and the plastic deformation of the pre-deformed wire in synchronization with the advancing direction of the pre-deformed wire and the direction of the advancing direction The constituting mechanism 4 is a pulling driving wheel 72 for pulling the wire through the heterogeneous forming mechanism to provide sufficient pulling tension, and an angle between the axis of the winding wheel 71 and the axis of the pulling driving wheel 72 is present, and the tension is constant. System 5 and take-up device 6. The pre-deformation mechanism 3 makes the wave height H of the pre-deformed wire in each plane 150%-165% of the average diameter of the bus bar, and the wave height H is the highest point and the lowest point of the pre-deformed wire in the pre-deformation plane. The outer envelope contour diameter formed by the direction of travel of the wire. The pre-deformation mechanism is a press roll having a pre-deformed shape on the surface, and the wave height of the pre-deformation of the wire is controlled by changing the pre-deformed shape, that is, the tooth height of the surface of the press roll, or by changing the depth of press-in between the press rolls, Two sets of press rolls are used in this embodiment to achieve pre-deformation in two planes.

The heterogeneous molding mechanism 4 is a cylindrical drawing die. As shown in FIG. 8, the cylindrical drawing die includes a tapered inlet 41 and a cylindrical sizing tape 42. The inner diameter of the tapered inlet 41 is from the outside to the outside. The inner diameter is gradually reduced, and the inner diameter of the sizing belt 42 coincides with the minimum inner diameter of the tapered inlet 41; the inner diameter of the sizing belt 42 is 90% of the diameter of the busbar.

a) Pre-deformation: the straight metal bus bar passes through a plurality of rotation axes between the rotation axes, and continuously switches the wire-passing wheel 2 in the advancing direction of the wire, and then enters the pre-deformation mechanism 3 to perform pre-deformation processing of the wire, and processes the a pre-deformed wire deformed in two mutually perpendicular planes A and B, wherein the wave height H of the pre-deformed wire in each plane is 150%-165% of the average diameter of the bus bar, as shown in Fig. 1, in plane A And B is symmetrically uniform wave shape; the average diameter of the bus bar is 0.125mm.

b) Heterogeneous molding: the preformed wire is wound one turn on the winding wheel 71, and then enters the heterogeneous molding mechanism 4, and the drawing drive wheel 72 pulls the wire through the heterogeneous molding mechanism 4, through the winding wheel 71 and pulls Pulling the drive wheel 72 with the additional applied twisting force on the wire, pre-deforming the wire in the forward direction and Synchronous plastic deformation occurs in the direction of the advancing direction, which causes the wave shape of the pre-deformed wire to be distorted, and at the same time, a certain surface hardness isomerized due to the deformation strengthening, forming an isomeric metal with an isomerized portion as shown in FIGS. 2 and 3. Silk 1;

Example 3

A third embodiment of the heterogeneous metal wire of the present invention as shown in Figures 2 and 3:

The outer envelope diameter D is 1.65 times the average diameter d of the wire 1 itself.

The isomeric wire 1 has an average diameter d of 0.4 mm.

As shown in FIG. 6, the apparatus for manufacturing the isomerized metal wire of the embodiment is prepared, and the device includes a wire wheel 2 A pre-deformation mechanism 3 for deforming a wire in two mutually perpendicular planes A and B, a heterogeneous molding mechanism for plastically deforming a pre-deformed wire in a forward direction of the pre-deformed wire and a direction of advancement in advance 4 a pull drive wheel 72 for pulling the wire through the heterogeneous molding mechanism to provide sufficient drawing tension, the wire tensioning constant tension system 5 and the wire take-up device 6, and a driving heterogeneous molding mechanism surrounding the cylindrical drawing die The sizing belt 42 is rotated by the drive unit 8 of the axis 42. The pre-deformation mechanism 3 makes the wave height H of the pre-deformed wire in each plane 190%-200% of the average diameter of the bus bar, and the wave height H is the highest point and the lowest point of the wire pre-deformed in the pre-deformation plane. The outer envelope contour diameter formed by the direction of travel of the wire. The pre-deformation mechanism is a press roll having a pre-deformed shape on the surface, and the wave height of the pre-deformation of the wire is controlled by changing the pre-deformed shape, that is, the tooth height of the surface of the press roll, or by changing the depth of press-in between the press rolls, Two sets of press rolls are used in this embodiment to achieve pre-deformation in two planes.

The heterogeneous molding mechanism 4 is a two-tube drawing die. As shown in FIG. 8, the cylindrical drawing die includes at least a tapered inlet 41 and a cylindrical sizing tape 42. The inner diameter of the tapered inlet 41 is The outer diameter is gradually reduced, and the inner diameter of the sizing belt 42 coincides with the minimum inner diameter of the tapered inlet 41. From the direction of the busbar to the take-up line, the inner diameter of the sizing belt 42 of the different cylindrical drawing dies is sequentially reduced, wherein the inner diameter of the smallest sizing belt is 90% of the diameter of the busbar.

a) Pre-deformation: the straight metal bus bar passes through a plurality of rotation axes between the rotation axes, and continuously switches the wire-passing wheel 2 in the advancing direction of the wire, and then enters the pre-deformation mechanism 3 to perform pre-deformation processing of the wire, and processes the a pre-deformed wire deformed in two mutually perpendicular planes A and B, wherein the wave height H of the pre-deformed wire in each plane is 190%-200% of the average diameter of the bus bar, as shown in Fig. 1, in plane A And B is symmetrically uniform wave shape; the average diameter of the bus bar is 0.45mm.

b) Heterogeneous molding: the pulling drive wheel 72 pulls the wire through the heterogeneous molding mechanism 4, and the driving device 8 drives the heterogeneous molding mechanism 4 to rotate, and rotates around the axis of the sizing belt by the heterogeneous molding mechanism 4, pre-variation The shaped wire encounters plastic deformation synchronously in the advancing direction and the direction of advancing, causing the wave shape of the pre-deformed wire to be distorted, and at the same time, a certain surface hardness isomerized due to the deformation strengthening, forming a belt as shown in FIGS. 2 and 3. Isomerized wire 1 having an isomer;

Example 4

A fourth embodiment of the heterogeneous wire of the present invention as shown in Figures 2 and 3:

The outer envelope diameter D is 1.25 times the average diameter d of the wire 1 itself.

The average diameter d of the isomerized wire 1 is 0.130 mm.

As shown in FIG. 7, the apparatus for fabricating the isomerized metal wire of the present embodiment includes several a pre-deformation mechanism 2 having an angle between the rotation axes and constantly changing the advancement direction of the wire, and a pre-deformation mechanism 3 for deforming the wire in two mutually perpendicular planes A and B, advancement of the pre-deformed wire The direction and the direction of the advancement are synchronous. The heterogeneous molding mechanism 4 that plastically deforms the pre-deformed wire, the pulling drive wheel 72 that pulls the wire through the heterogeneous molding mechanism to provide sufficient drawing tension, and the line-retracting constant tension system 5 and Wire take-up device 6. The pre-deformation mechanism 3 makes the wave height H of the pre-deformed wire in each plane 180%-190% of the average diameter of the bus bar, and the wave height H is the highest point and the lowest point of the wire pre-deformed in the pre-deformation plane. The outer envelope contour diameter formed by the direction of travel of the wire. The pre-deformation mechanism is a press roll having a pre-deformed shape on the surface, and the wave height of the pre-deformation of the wire is controlled by changing the pre-deformed shape, that is, the tooth height of the surface of the press roll, or by changing the depth of press-in between the press rolls, Two sets of press rolls are used in this embodiment to achieve pre-deformation in two planes.

The heterogeneous molding mechanism 4 is a three-tube drawing die. As shown in Fig. 8, the cylindrical drawing die includes a tapered inlet 41 and a cylindrical sizing tape 42. The inner diameter of the tapered inlet 41 gradually increases from the outside to the inside. Shrinking, the inner diameter of the sizing belt 42 coincides with the minimum inner diameter of the tapered inlet 41. From the direction of the busbar to the take-up line, the inner diameter of the sizing belt 42 of the different cylindrical drawing dies is sequentially reduced, wherein the inner diameter of the smallest sizing belt is 98% of the diameter of the busbar. And in the three cylindrical drawing dies, the first two cylindrical drawing dies in the direction from the busbar to the take-up line are continuous, and the wire is first taken after the two cylindrical drawing dies (not shown in FIG. 7) Draw the take-up device here) and then enter the third cylindrical drawing die.

a) Pre-deformation: the straight metal bus bar passes through a plurality of rotation axes between the rotation axes, and continuously switches the wire-passing wheel 2 in the advancing direction of the wire, and then enters the pre-deformation mechanism 3 to perform pre-deformation processing of the wire, and processes the a pre-deformed wire deformed in two mutually perpendicular planes A and B, wherein the wave height H of the pre-deformed wire in each plane is between 180% and 190% of the average diameter of the bus bar, as shown in FIG. And B is symmetrically uniform wave shape; the average diameter of the bus bar is 0.135mm.

b) Heterogeneous molding: the pulling drive wheel 72 pulls the wire through the heterogeneous forming mechanism 4, and the pre-deformed wire is in the advancing direction due to the torsional internal stress accumulated by the wire passing through the plurality of pulleys 2 before the pre-deformation Synchronous plastic deformation occurs in the direction of the advancing direction, causing the wave shape of the pre-deformed wire to be distorted, and at the same time, a certain surface hardness isomerized due to the deformation strengthening, forming a heterogeneous heterogeneous portion as shown in FIGS. 2 and 3. Wire 1;

Example 5

A first embodiment of the heterogeneous steel wire of the present invention as shown in Figures 2 and 3:

There are two sets of heterogeneous portions, each of which is composed of a curling portion 12 and a twisted portion 11, the steel wire axis z in the curling portion 12 is on the same plane, and the steel wire axis z in the twisting portion 11 does not share any plane. The steel wire axis z of the curl portion 12 of the same group of isomers is in the same plane. In this embodiment, the axis z of the curl portion 12 of a group of heterogeneous portions is located in the plane A, and the other group of the isomers The axis z of the curling portion 12 is located in the plane B; the planes A and B where the curling portions 12 of the two sets of the isomers are respectively intersected the outer centerline of the heterogeneous line; the curling portions 12 of the two sets of the heterogeneous portions are respectively located After the planes A and B intersect, the adjacent angles α and β between the planes are equal, and the isotropic of the steel wire is good.

When an external tension of 5 Newtons is applied to the heterogeneous steel wire, the outer diameter D of the heterogeneous steel wire is 1.45 times the average diameter d of the heterogeneous steel wire.

The heterogeneous steel wire 1 has an average diameter of 0.15 mm, a carbon content of more than 0.70% and a metal plating layer.

The distance between two adjacent vertices t or two adjacent bottom points b of the same group of isomers is less than 200 times the average diameter d of the heterogeneous steel wire 1.

There is a wear-resistant area on the surface of the twisted portion 11; the hardness of the wear-resistant area is higher than other areas, and both are The vertex t or the bottom point b of the twisted portion 11, or the region immediately adjacent to the vertex t or the bottom point b reaches a local maximum.

As shown in FIG. 4, the apparatus for fabricating the heterogeneous steel wire of the present embodiment is provided. The device includes a plurality of intersecting wheels 2 and a pair of steel wires which have an angle between the axes of rotation and continuously change the forward direction of the steel wire. a pre-deformation mechanism 3 for deforming the mutually perpendicular planes A and B, a heterogeneous molding mechanism 4 for plastically deforming the pre-deformed steel wire in the advancing direction of the pre-deformed steel wire and the direction of the advancing and advancing direction, for pulling the steel wire The pull drive wheel 72 is provided with a sufficient drawing tension by the heterogeneous molding mechanism to take up the constant tension system 5 and the take-up device 6. The pre-deformation mechanism 3 makes the wave height H of the pre-deformed steel wire in each plane 280%-300% of the average diameter of the bus bar, and the wave height H is the highest point and the lowest point of the steel wire pre-deformed in the pre-deformation plane. The outer envelope contour diameter formed by the direction of travel of the steel wire. The pre-deformation mechanism is a pressure roller having a pre-deformed shape on the surface, and the wave height of the pre-deformation of the steel wire is controlled by changing the pre-deformed shape, that is, the tooth height of the surface of the pressure roller. In this embodiment, two sets of pressure rollers are used to realize Pre-deformation in two planes.

The heterogeneous molding mechanism 4 is a cylindrical drawing die. As shown in FIG. 8, the cylindrical drawing die includes a tapered inlet 41 and a cylindrical sizing tape 42. The inner diameter of the tapered inlet 41 is gradually reduced from the outside to the inside. The inner diameter of the sizing belt 42 coincides with the minimum inner diameter of the tapered inlet 41; the inner diameter of the sizing belt 42 is 95% of the diameter of the busbar.

The preparation method of the heterogeneous steel wire of the embodiment comprises the following steps:

a) Pre-deformation: the straight steel wire passes through a plurality of rotation axes between the rotation axes, and continuously converts the wire-passing wheel 2 in the forward direction of the steel wire, and then enters the pre-deformation mechanism 3 to perform pre-deformation processing of the steel wire, and is processed in Two pre-deformed steel wires deformed in mutually perpendicular planes A and B, wherein the wave height H of the pre-deformed steel wire in each plane is 280%-300% of the average diameter of the bus bar, as shown in Fig. 1, in plane A and B has a symmetrical uniform wave shape; the average diameter of the bus bar is 0.16 mm.

b) Heterogeneous molding: the pulling drive wheel 72 pulls the steel wire through the heterogeneous forming mechanism 4, and the pre-deformed steel wire is in the forward direction due to the accumulated internal stress accumulated by the steel wire passing through the plurality of pulleys 2 before the pre-deformation Ring Synchronous plastic deformation occurs in the direction of advancement, which causes the wave shape of the pre-deformed steel wire to be distorted, and at the same time, a certain surface hardness isomerized due to deformation strengthening, forming a heterogeneous heterogeneous portion as shown in Figs. Steel wire 1;

c) Closing line: The isolating steel wire 1 is then wound up by the winding tension constant system 5 and the wire take-up device 6 in turn.

In the above embodiments, when the wire is pre-deformed, not only the wavy shape as described in the above embodiments may be formed into a symmetrical uniform wave shape, but also may be formed into a rectangular shape, a trapezoidal shape or an irregular bending, or Asymmetrical bending. Similarly, in the apparatus for fabricating the heterogeneous wire shown in FIG. 4, by adding a pair of press rolls in the other direction, the wire can be pre-deformed in three planes, and so on.

In each of the above embodiments, the planes of the curled portions 12 of the respective groups of the isomers intersect at the outer centerline of the heterogeneous line; the planes of the curled portions 12 of the two sets of heterogeneous portions intersect each other, and the interplanar phase The angle between the adjacent sides is equal, and the isotropic of the steel wire is good. It is foreseeable that the steel wire is slightly less isotropic when one of these two characteristics is not met. However, as the number of heterogeneous groups increases, the effects of these two features on isotropic will be impaired.

In view of the above-described embodiments of the present invention, various changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and the technical scope thereof must be determined according to the scope of the claims.

Claims

A heterogeneous wire for multi-wire cutting, characterized in that:

1) comprising two or more groups of isomers, each of which is composed of a curling portion (12) and a twisted portion (11), and the wire axis z in the curling portion (12) is on the same plane, The wire axis z in the twisted portion (11) does not share any plane; the wire axis z of the curl portion (12) of the same group of isomers is in the same plane;

2) The outer diameter D is 1.05-1.65 times the average diameter d of the wire (1) itself.
The isomeric wire for multi-wire cutting according to claim 1, characterized in that the surface of the twisted portion (11) has a wear-resistant region; the hardness of the wear-resistant region is higher than other regions.
The isomeric wire for multi-wire cutting according to claim 2, wherein the hardness of the wear-resistant region is at the apex (t) or bottom point (b) of the twisted portion (11), or in the immediate vicinity The area of vertex (t) or bottom point (b) reaches a local maximum.
The isomeric wire for multi-wire cutting according to claim 1, characterized in that the isoelectric wire (1) has an average diameter d of between 0.08 mm and 0.40 mm.
The isomeric wire for multi-wire cutting according to claim 1, wherein the planes of the curl portions (12) of the different sets of isomers are respectively intersected at the outer centerline of the heterogeneous line.
The isomeric wire for multi-wire cutting according to claim 1 or 5, wherein the planes of the curl portions (12) of the respective isomers are equal, and the adjacent angles between the planes are equal. .
The isomeric wire for multi-wire cutting according to claim 1, wherein the distance between two adjacent vertices (t) or two adjacent bottom points (b) of the same group of isomers It is less than 200 times the average diameter d of the isomerized metal wire (1).
An apparatus for fabricating an isomeric metal wire according to any one of claims 1 to 7, characterized in that at least the wire rod (2) and the bus bar of the isomerized metal wire (1) are arranged in two planes or a pre-deformation mechanism (3) that performs deformation in a plurality of planes, in the advancing direction of the pre-deformed wire and in the direction of encircling advancement A heterogeneous molding mechanism (4) for plastically deforming a pre-deformed wire, a pulling drive wheel (72) for pulling a pre-deformed wire to provide sufficient drawing tension through a heterogeneous molding mechanism, and a wire-retracting constant tension system (5) And the wire take-up device (6), the bus bar of the isomerized wire (1) is a raw material for preparing the isomerized wire.
The apparatus for fabricating an isomeric metal wire according to claim 8, wherein said pre-deformation mechanism (3) causes a wave height H of each of the in-plane pre-deformed wires to be between 105% and 300% of an average diameter of the bus bar. Meanwhile, the wave height H is an outer envelope contour diameter formed along the traveling direction of the wire at the highest point and the lowest point of the pre-deformed wire in the pre-deformation plane.
The apparatus for fabricating an isomeric metal wire according to claim 9, wherein said pre-deformation mechanism (3) causes a wave height H of each of the in-plane pre-deformed wires to be 150%-200% of an average diameter of the bus bar. between.
The apparatus for producing an isomeric metal wire according to claim 8, further comprising a winding wheel (71) located before the heterogeneous molding mechanism (4), and an axis of the winding wheel (71) and a drawing drive wheel ( There is an angle between the axes of 72).
The apparatus for producing an isomeric metal wire according to claim 8, wherein said heterogeneous molding mechanism (4) is a cylindrical drawing die, and said cylindrical drawing die comprises at least a cylindrical shape. The diameter of the sizing belt (42) is smaller than the diameter of the isomerized metal bus bar.
The apparatus for producing an isomeric metal wire according to claim 12, wherein said cylindrical drawing die further comprises a tapered inlet (41), and an inner diameter of said tapered inlet (41) is from outside to inside Gradually, the inner diameter of the sizing belt (42) coincides with the minimum inner diameter of the tapered inlet (41).
The apparatus for manufacturing an isomerized wire for multi-wire cutting according to claim 12, wherein said heterogeneous molding mechanism (4) comprises a cylindrical drawing die, and the inner diameter of the sizing tape (42) is a bus bar. 90%-99% of the diameter.
The apparatus for manufacturing a heterogeneous wire for multi-wire cutting according to claim 14, wherein: The inner diameter of the sizing belt (42) is 95% to 99% of the diameter of the bus bar.
The apparatus for manufacturing an isomerized wire for multi-wire cutting according to claim 12, wherein said heterogeneous molding mechanism (4) comprises at least two cylindrical drawing dies extending from the bus bar to the wire take-up In the direction, the inner diameter of the sizing belt (42) of different cylindrical drawing dies is sequentially reduced, and the inner diameter of the minimum sizing belt (42) is 90%-99% of the diameter of the bus bar.
The apparatus for producing an isomeric metal wire according to claim 12, further comprising a driving device for driving the heterogeneous molding mechanism (4) to rotate around the axis of the sizing belt (42) of the cylindrical drawing die ( 8).
A method of fabricating an apparatus for producing an isomeric metal wire according to any one of claims 8 to 17, characterized in that it comprises at least the following steps:

1) Pre-deformation: the busbar of the isomerized wire (1) is passed through the reel (2), and then enters the pre-deformation mechanism (3) for pre-deformation processing, and the pre-deformation in two planes or planes is processed. Deforming the wire and ensuring that the wave height H of the pre-deformed wire in each plane is between 105% and 300% of the average diameter of the bus bar, the wave height H being the highest point of the wire after pre-deformation in the pre-deformation plane The outer contour contour diameter formed by the lowest point along the direction of travel of the wire;

2) Heterogeneous molding: the pulling drive wheel (72) pulls the pre-deformed wire through the heterogeneous molding mechanism (4), during the process due to the twisted internal stress accumulated by the wire itself, or through the winding wheel and the pulling drive wheel The pre-deformed wire is subjected to a torsional force in the advancing direction and the advancing direction by the twisting force applied to the wire or the twisting force of the wire by the rotation of the axis of the sizing belt by the heterogeneous forming mechanism (4). Forming an isomeric metal wire (1);

3) Take-up: The isolating wire (1) is wound and wound by the wire-retracting constant tension system (5) and the wire-receiving device (6).