WO2015039524A1

WO2015039524A1 - Metal wire for cutting free abrasive, and manufacturing device and method for same

Info

Publication number: WO2015039524A1
Application number: PCT/CN2014/085266
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: 2013-09-18
Filing date: 2014-08-27
Publication date: 2015-03-26
Also published as: CN104085050A; CN104085050B

Abstract

A metal wire with self-construction capability used in free abrasive cutting, the axis of the metal wire being a straight or approximately straight line, the cross-section thereof being a circle or approximate circle, and a plurality of wear-resistant areas having higher hardness than other areas being regularly arranged axially on the surface of the metal wire; and a metal wire manufacturing device and method. When being used in multi-wire free abrasive cutting, the metal wire will gradually self-construct surface depressions or protrusions in a cutting feed direction following the abrasion to the metal wire caused by the abrasives, such that the resultant surface stereoscopic structure enhances abrasives carrying capacity, thus improving the ability to maintain a consistent good product rate from the cutting starting end to the cutting tail end.

Description

Technical field

The present invention relates to the field of wire technology for free abrasive cutting, and more particularly to a wire for free abrasive cutting and a device for producing the same for a multi-wire free abrasive cutting crystalline silicon, silicon carbide, sapphire, crystal, etc. And methods.

Background technique

The multi-wire cutting uses a wire as a carrier, and the wire carries a super-hard abrasive in a high-speed motion, and the high-hard material (such as crystalline silicon, silicon carbide, sapphire, crystal, etc.) is subjected to roll-cut grinding by the abrasive to realize 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 (straight wire), which has the outstanding advantage that the wire can uniformly carry the abrasive in the direction around which it is cut and fed, 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 improve 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-wire cutting was born, efforts to improve the abrasive carrying capacity of the wire ("saw wire") have begun and continue to this day, typically divided into three categories: The first is to try to make rough wire , increase the wire by increasing the roughness of the wire surface Abrasive carrying capacity. For example, JP2007 196312 proposes to cause irregularities on the surface of the wire by spraying the electrolyte onto the surface of the wire; W0 9/12670 proposes a micro-cavity wire, a soft surface wire, and a metal whose cross-section changes in the length direction. Concept of 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 to make the straight wire into a spiral shape, 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 prominent in the difficulty of completing a 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, JP 2004 276207 describes a single-line or stranded wire having a spiral shape, and it is also described that the single-wire or stranded wire is guided through a pair of cogwheels to form a double wrinkle in a single plane. In the crepe fold, the saw wire is first bent in the first direction, then the second bend in the second direction and opposite to the first direction (reverse bend), and then through the strand and the twist will be shorter The length of the U-shaped folds is 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 only in one plane is formed, thereby resulting in good cutting. The rate fluctuates. 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 to be single. The wire is bent on the plane by means of a bite gear (or other deformation device), by twisting the wire (the plane around the axis of the wire is rotated to deform the device, or the plane of the deformation device is kept stationary but the same Rotate the receiving and unwinding shaft) to form a spiral wire, and then untwist the wire (rotate the plane of the deformation device in the opposite direction to the twisting direction, or keep the plane of the deforming device still but The reverse twist rotates the take-up and take-up spool) to partially or completely release the torsional internal stress caused by the twisting of the wire. During the implementation, it was found that the necessary wire retreat resulted in no improvement in the uniformity of the surrounding axis or the structural retention capability compared to the method provided by CN100475398C. Both CN102962901A and CN102310489A are natural extensions in the concepts of CN100475398C and CN102528940A, and no independent technical contributions have been made. In addition to the fluctuation in cutting yield due to the presence of the main deformation plane, and the limited retention of the structure, the cutting tail yield is significantly reduced compared to the cutting start. Another significant weakness of the above-mentioned structural wire is the outer diameter of the wire. Greater than the wire busbar, resulting in a widening of the kerf, resulting in an increase in material loss during the cutting process. In particular, the use of structural wire at the expense of kerf widening often does not result in an imaginary increase in cutting speed - because the speed of the multi-line cutting is due to the cutting speed at the cutting end: a) cutting At the beginning, the wire has not been worn, the wire diameter is the largest, and the ability to carry the abrasive itself is strong. At this time, the surface three-dimensional structure of the structural metal ribbon is more icing on the cake;

b) When the end of the cutting is reached, the wire is worn and the wire diameter becomes smaller (the wear of the wire at the cutting edge of the current industry is generally close to 10% when the wire reaches the cutting tail), resulting in a decrease in the abrasive carrying capacity. In the urgent need for the structural three-dimensional structure of the wire surface to transport carbon in the abrasive-carrying snow, the surface structure of the structural wire has often disappeared (especially in the case of long cutting paths). 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. 08 let -0.115 let), resulting in The cutting path continues to lengthen, which further limits the scope of application of the above-mentioned conventional structural lines. Summary of the invention

The technical problem to be solved by the present invention is: In order to resolve the common defects common to the conventional linear wire and the conventional structural wire, the closer the cutting tail is, the worse the ability of the wire to carry the abrasive, and the more serious the cutting yield is lowered. Problem, the present invention provides a wire for free abrasive cutting and a device and method for making same. The technical solution adopted by the present invention to solve the technical problem thereof is: a wire having a self-constructing capability for free abrasive cutting,

a) its axis is straight or nearly straight, the section is circular or nearly circular, and the wire diameter is uniform or uniform;

b) the surface of the wire is regularly distributed along the axis direction with a number of wear-resistant areas;

c) The wear-resistant zone has a higher hardness than the other zones.

The wire of the present invention has an axis which is approximately straight, and the cross section is approximately circular. The uniform change of the wire diameter refers to the deviation of the wire during the processing.

"Self-construction" in the "self-constructing ability" and "self-contained depression or protrusion" according to the present invention means that the free abrasive which is moved at a high speed is continuously sheared in a direction parallel to the axis of the wire of the present invention. Erosion, the surface of the wire will form depressions or projections along the axis.

When applied to a free abrasive cutting environment, the wear-resistant area wears more rapidly than the wear-resistant area under the action of the abrasive, resulting in self-contained depressions or protrusions on the surface of the wire, and the abrasive of the wire is enhanced by the three-dimensional structure of the new surface. Carrying ability to compensate for the loss of abrasive carrying capacity caused by the reduction of wire diameter due to wear. In order to ensure that the self-construction of the wire can bring about a reasonable increase in abrasive carrying capacity, the maximum width of each of the wear-resistant zones is generally controlled to be less than 100 times the diameter of the wire.

Further, preferably, the maximum width of each of the wear-resistant regions is smaller than the diameter of the wire 10 times to achieve better abrasive carrying capacity compensation without affecting other aspects of wire. The wear-resistant region is distributed over the entire circumference of the same portion around the axis. In this case, the self-constructed surface generated after the wire is worn is mainly overlapped by a ring-shaped unevenness.

The wear-resistant zone may also be distributed only in a portion of the circumference of the same portion around the axis. In this case, the self-constructed surface created by the wear of the wire is more complex and multi-dimensional, and is generally more beneficial for improving the carrying abrasive capacity.

The application object of the wire according to the present invention is a multi-line free abrasive precision cutting, and the general wire diameter is

Between 0.08mm and 0.80 mm.

The wire of the present invention is particularly suitable for precision cutting of multi-wire free abrasives which are sensitive to kerf loss. In this case, the wire diameter is generally preferably between 0.09 mm and 0.14 mm to minimize the loss of the kerf.

The first device for fabricating the wire comprises at least a reeling wheel arranged in sequence, a pre-deformation mechanism for plastically twisting the wire of the wire or deforming the surface thereof, and performing deformation strengthening on the pre-deformed wire. The deformation strengthening mechanism, the pulling drive wheel for pulling the wire through the deformation strengthening mechanism to provide sufficient pulling tension, the wire tensioning tensioning system and the wire take-up device; the deformation strengthening mechanism is a cylindrical drawing die, the The cylindrical drawing die comprises at least a tapered inlet and a cylindrical sizing belt, the inner diameter of the tapered inlet is gradually reduced from the outside to the inside, the inner diameter of the sizing belt is identical to the minimum inner diameter of the tapered inlet, and the inner diameter of the sizing belt is smaller than or It is equal to the wire diameter of the wire busbar before pre-deformation.

A method for preparing the first wire making device comprises at least the following steps: a) pre-deformation: passing a straight wire bus bar through a wire reel and then entering a pre-deformation mechanism to perform at least one pre-deformation of the wire Processing, processing pre-deformed wire containing plastic distortion or surface concavo-convex deformation; b) deformation strengthening: pulling the driving wheel to pull the pre-deformed wire through the deformation strengthening mechanism, forming a self-constructing metal through the sizing belt Silk; because the sizing belt has a smaller inner diameter than or It is equal to the busbar diameter of the pre-deformed wire. After the pre-deformed wire is drawn, it is drawn into a linear wire with a finer wire diameter. The unevenness along the axial direction caused by the pre-deformation is in the process of deformation strengthening. Being solidified, the surface hardness is unevenly distributed along the axial direction of the wire, and the distribution is periodically repeated along the axial direction of the wire to form a wire having self-constructing ability;

C) Take-up: The wire with self-construction ability is wound up by the wire tensioning system and the wire take-up device.

The second manufacturing apparatus for manufacturing the wire includes at least a reeling wheel, a surface hardness isomerism device, a wire-retracting constant tension system, and a wire take-up device; the surface hardness isomerization device includes at least one A wire surface heating device that intermittently works in time to heat the surface of the wire passing therethrough, the temperature at which the surface of the wire is heated is the same or the same in all directions of the wire axis.

The surface hardness isomerization device further includes a wire surface cooling device for controlling the speed or rapidly cooling the surface of the wire after the wire surface heating device.

The preparation method of the second wire forming device comprises at least the following steps: a) performing surface hardness isomerization on the straight wire bus bar: passing the wire bus bar through the wire wheel, and then entering the surface hardness isomerization The device performs at least one surface hardness isomerization treatment to form a wire having self-construction capability;

The surface hardness isomerization treatment is such that the wire surface heating device intermittently raises a part of the surface of the passing wire to a tempering critical temperature or a tempering critical temperature of the wire, keeps it for a certain time, and then controls the speed thereof. Or rapid cooling; wherein, the controlled rate cooling comprises natural cooling, that is, natural cooling is a special case of the controlled rate cooling according to the present invention;

b) Take-up: The wire with self-construction ability is wound and wound by the wire tensioning system and the wire take-up device. The cooling rate of the wire after the surface is raised to the tempering critical temperature or above and held for a certain period of time depends on the metallographic composition of the original wire itself, the selection of the critical temperature and the surface properties of the wire after tempering. In general, natural cooling or slow cooling causes the metallurgical structure of the wire surface to develop toward finer equiaxed grains, which is manifested by increased plasticity and deformation. However, hardness and wear resistance are reduced together; rapid cooling of high-temperature surfaces generally leads to quenching of the surface, which is accompanied by an increase in hardness, brittleness and wear resistance. Specifically, the wire having the self-constructing ability of the present invention can be selected by the technician according to the specific product specification design and the corresponding manufacturing equipment environment: selecting natural or slow cooling, generally equivalent to guiding the high temperature surface area into low wear resistance. Zone, the choice of rapid cooling, is generally equivalent to guiding the high temperature surface into a high wear zone.

The invention has the beneficial effects that the self-constructing metal wire of the invention is used for the free abrasive cutting, and the wear surface of the wire is regularly worn due to the regular distribution of the wear-resistant area of the wire surface along the axial direction. Differently, the surface of the wire gradually self-constructs the surface depression or protrusion along the cutting feed direction, thereby enhancing the abrasive carrying capacity by the surface three-dimensional structure, and compensating for the wire diameter becoming thin due to the wire cutting wear. Abrasive carrying capacity is reduced, which greatly enhances the ability to maintain consistent yields from the cutting start to the cutting end. DRAWINGS

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

Figure 1 is a schematic view showing the structure of a wire bus bar before pre-deformation.

Figure la is an axial view of the wire axis X of Figure 1.

Figure lb is an axial view of the wire axis Y of Figure 1.

Figure lc is an axial view of the wire axis Z of Figure 1, with black circles indicating the axis of the wire itself. Fig. 2 is a perspective view showing the structure of a pre-deformed wire in the first embodiment of the present invention. Figure 2a is an axial view of the wire axis X of Figure 2.

Figure 2b is an axial view of the wire axis Y of Figure 2.

Fig. 2c is an axial view of the wire axis Z of Fig. 2, and the middle straight line is formed by projecting the axis of the wire itself.

Fig. 3 is a perspective view showing the structure of the pre-deformed wire in the embodiment 2 of the present invention. Figure 3a is an axial view of the wire axis X of Figure 3.

Figure 3b is an axial view of the wire axis Y of Figure 3.

Figure 3c is an axial view of the wire axis Z of Figure 3, in which the center-like twisted line pattern is formed by the projection of the wire itself.

4 is a structural schematic view of the metal ribbon of FIG. 3 having an axial projection surface and a normal plane.

Fig. 5 is a view showing the configuration of a wire forming apparatus in the first embodiment of the present invention.

Fig. 6 is a view showing the configuration of a wire forming apparatus in a second embodiment of the present invention.

Figure 7 is a schematic view showing the structure of a wire forming apparatus in Embodiment 3 of the present invention.

Fig. 8 is a view showing the configuration of a wire forming apparatus in a fourth embodiment of the present invention.

Fig. 9 is a schematic view showing the structure of a drawn cylindrical mold in the apparatus for producing a wire according to the present invention.

Figure 10 is a schematic view showing the three-dimensional structure of the finally prepared wire of the present invention. Fig. 11 is a view showing one of the structural forms of the wire formed by the final preparation of the wire of the first embodiment of the present invention which is abraded by the abrasive and forms a self-contained depression and projection.

Figure 12 is a graph showing the surface of the wire prepared in the final stage of the present invention being abraded by abrasives to form a self-construction. Schematic diagram of one of the recessed and raised wires. Figure 13 is a schematic view showing one of the structures of the wire prepared by the final preparation of the wire according to the first embodiment of the present invention, which is abraded by the abrasive to form a self-contained depression and a raised wire.

Fig. 14 is a view showing the configuration of a tempering device in the wire forming apparatus of the fifth embodiment of the present invention. Fig. 15 is a view showing the configuration of a tempering device in the wire forming apparatus of the sixth embodiment of the present invention. In the figure: la, pre-deformed wire, lb, wire formed by self-contained depression and protrusion after abrasion, 100, wear-resistant zone, 11, twisted part, 13, deformation part, 2 Wheel, 3, pre-deformation mechanism, 4, deformation strengthening mechanism, 41, tapered inlet, 42, sizing belt, 5, line constant tension system, 6, wire take-up device, 72, pull drive wheel, 8, surface Hardness isomerism device, 81, drive device, I, axial projection surface, II, normal plane, d, diameter of the wire itself. detailed description

The invention will now be described in detail with reference to the drawings. The drawings are simplified schematic diagrams, and only the basic structure of the invention is illustrated in a schematic manner, and thus only the configurations related to the present invention are shown. A wire for free abrasive cutting with self-construction capability of the present invention, as shown in FIG. 10, a) its axis is straight or nearly straight, the cross section is circular or approximately circular, and the wire diameter is uniform or evenly changed. ;

b) the surface of the wire is regularly distributed along the axial direction of the wear-resistant area 100;

c) The wear resistant zone 100 has a higher hardness than the other zones.

Example 1

5 is a manufacturing apparatus of the wire according to the embodiment, comprising a reeling wheel 2 arranged in sequence, a pre-deformation mechanism 3 for performing a concavo-convex deformation in one plane of the wire bus bar, and a wire for pre-deforming the wire The deformation strengthening mechanism 4 for deforming the deformation, the pulling drive wheel 72 for pulling the wire through the deformation strengthening mechanism to provide sufficient drawing tension, the wire drawing constant tension system 5 and the wire take-up device 6; the deformation strengthening mechanism 4 is a tube The drawing die, as shown in FIG. 9, 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, and the sizing tape 42 The inner diameter of the sizing belt is 0. 08mm. The inner diameter of the sizing belt is 0. 08mm. The inner diameter of the sizing belt is 0. 08mm.

The method for preparing the wire manufacturing apparatus of the embodiment includes the following steps:

a) Pre-deformation: 0. 09mm straight wire busbar passes through the reel 2, and then enters the pre-deformation mechanism 3 to perform pre-deformation processing of the wire, and processes the pre-deformed wire la in a plane; the wire busbar The structure is shown in Figure 1, Figure la, Figure lb and Figure lc;

b) deformation strengthening: the pulling drive wheel 72 pulls the pre-deformed wire la through the deformation strengthening mechanism 4, and after passing through the sizing belt, a wire having a self-constructing capability and a diameter of 0.08 mm is formed, and the wire structure is as shown in the figure 10;

c) Take-up: The wire with self-construction capability is then wound through the wire tensioning system.

2, 2a, 2b and 2c are schematic views showing the structure of the straight metal bus bar in the present embodiment after passing through the pre-deformation mechanism 3. The deformation method of the pre-deformation mechanism 3 of this embodiment is as follows:

The straight wire passes through the reel 2 in turn, and then enters the pre-deformation mechanism 3 to perform pre-deformation processing of the wire once, and the wire la deformed in one plane is processed, and the deformation portion 13 is symmetrically uniform as shown in FIG. Wavy.

11-13 are conceptual diagrams showing three structures of the wire prepared by the final preparation of the wire of the present invention which are abraded by the abrasive to form a self-concave recessed and raised wire, wherein the structure of FIG. 11 and the embodiment of the present invention are used. The method of obtaining the wire corresponds. A three-dimensional view is not shown in Figures 11-13, but the present invention There are various cases in which protrusions or depressions are formed along the wire axis and/or the surrounding axis, and the self-construction protrusions and depressions may be uniformly distributed or non-uniformly distributed.

Example 2

6 is a manufacturing apparatus of the wire according to the embodiment. The difference from the first embodiment is that the pre-deformation mechanism 3 includes a mechanism for performing unevenness deformation in one plane of the wire bus bar, and further includes deformation of the unevenness. The wire is mechanically twisted in the forward direction and in the direction of advancement. This embodiment can be understood as a plastic distortion of the wire bus.

The preparation method of this embodiment is different from that of the first embodiment in that after the uneven deformation, the plastic twisting mechanism is further passed, and the pulling drive wheel 72 pulls the wire through the plastic twisting mechanism, because the wire passes between the plurality of rotation axes before the pre-deformation. There is a twisted internal stress accumulated in the direction of the wire passing through the reel 2, and the deformed wire is plastically deformed in the forward direction and the direction of advancement, so that the wire after the deformation is deformed The wavy deformation portion 13 is twisted to form the wire 1a with the twisted portion 11 as shown in FIG.

Example 3

Fig. 7 is a view showing a manufacturing apparatus for a wire according to the present embodiment. Unlike the first embodiment, the pre-deformation mechanism 3 includes means for performing unevenness deformation on two planes of the wire bus bar, the two planes being perpendicular to each other. Accordingly, the preparation method of the present embodiment is different from that of Embodiment 1 in the process of pre-deformation.

Example 4

Fig. 8 is a view showing a manufacturing apparatus for a wire according to the present embodiment. Unlike the first embodiment, the pre-deformation mechanism 3 includes a mechanism for plastically twisting the wire bus bar. Accordingly, the preparation method of the present embodiment is different from that of Embodiment 1 in the process of pre-deformation.

Example 5

The apparatus for fabricating the wire of the embodiment shown in FIG. 14 includes at least a reel provided in sequence 2. Surface hardness isomerization device 8. Wire-retracting constant tension system 5 and wire-receiving device 6; said surface hardness isomerization device 8 includes at least one intermittently working in time to surface-heat the wire passing therethrough The annular wire surface heating device has a heating temperature on the surface of the wire that is the same around the wire axis.

The surface hardness isomerization device 8 further includes a wire surface cooling device for rapidly cooling the surface of the wire after the wire surface heating device.

The preparation method of the wire for fabricating the self-structuring ability of the embodiment includes the following steps:

a) Surface hardness isomerization of the wire: The ordinary straight wire is passed through the reel at a certain speed and enters the surface isomerization device. The first part of the device is an intermittent working annular metal surface heating device, which utilizes medium and high frequency alternating current The skin effect is rapidly heated by the surface of the wire passing through it. When the heating is turned on, the temperature of a part of the wire passing through it is raised to the tempering critical temperature or higher, and a certain holding time is obtained by the heating device along the axis, and the wire passing through the heating is stopped. The surface temperature is substantially constant, thus producing a high temperature and low temperature alternating wire surface; the second part of the surface isomerization device is a cooling device, and the surface temperature exceeds the critical temperature or higher after the wire having the high temperature and low temperature alternately enters the cooling zone. The quenching occurs in part, the surface hardness is greatly increased, and the surface hardness of the surface where the surface temperature has not reached the critical temperature remains unchanged, thereby completing the hardness isomerism on the surface of the wire.

b) Take-up: The wire with self-construction capability is wound through the wire-retracting constant tension system.

The surface of the finally prepared wire of this embodiment can also form a wire with self-contained depressions and projections as shown in Figs. 11-13 after being worn by the abrasive.

This embodiment can also produce a wire having a similar effect to that of Embodiments 1-5, and the structure in which the surface of the wire is worn by the abrasive includes the three structures shown in Figs. Of course, it also includes along the wire axis and / or Various cases of forming protrusions or depressions around the axis, and the self-construction protrusions and depressions may be uniformly distributed or non-uniformly distributed.

Example 6

15 is a manufacturing apparatus of the wire according to the embodiment. Unlike the embodiment 5, the wire surface heating device is not annular, but is rotated by a device for simultaneously heating both side surfaces of the wire together with the driving thereof. The driving device 81 is composed of, and the rotation axis of the device for simultaneously heating the both sides of the wire is the wire advancing direction. The manufacturing apparatus of the wire of this embodiment is produced in the same manner as in the fifth embodiment.

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 in accordance with the scope of the claims.

Claims

claims

1. A metal wire with self-forming ability for free abrasive cutting, characterized by: a) Its axis is straight or approximately straight, the cross-section is circular or approximately circular, and the wire diameter is consistent or uniformly varied;

b) Several wear-resistant zones (100) are regularly distributed along the axial direction on the surface of the metal wire;

c) The wear-resistant zone (100) has a higher hardness than other zones.

2. The metal wire for free abrasive cutting with self-constructing ability as claimed in claim 1, characterized in that: the maximum width of each wear-resistant zone is less than 100 times the diameter of the metal wire.

3. The metal wire for free abrasive cutting with self-constructing ability as claimed in claim 2, characterized in that: the maximum width of each wear-resistant zone is less than 10 times the diameter of the metal wire.

4. The metal wire with self-constructing ability for free abrasive cutting according to any one of claims 1 to 3, characterized in that: the wear-resistant zone is distributed in the entire circumference of the same part around the axis.

5. The metal wire for free abrasive cutting with self-constructing ability according to any one of claims 1 to 3, characterized in that: the wear-resistant zone is only distributed in part of the same part around the axis. Towards.

6. The metal wire with self-constructing ability for free abrasive cutting as claimed in claim 1, characterized in that: the wire diameter is between 0.08 mm and 0.80 mm.

7. The metal wire with self-constructing ability for free abrasive cutting as claimed in claim 6, characterized in that: the wire diameter is between 0.09mm-0.14mm.

8. A manufacturing device for making metal wires according to any one of claims 1 to 7, characterized in that: it at least includes wire passing wheels (2) arranged in sequence, plastically twisting the metal wire busbars or performing plastic distortion on its surface. Pre-deformation mechanism (3) that performs concave and convex deformation, and deformation strengthening mechanism that performs deformation strengthening on the pre-deformed wire.

(4), a drawing driving wheel (72) that provides sufficient drawing tension for pulling the metal wire through the deformation strengthening mechanism, a take-up constant tension system (5) and a take-up device (6); the deformation strengthening mechanism (4) ) is a cylindrical drawing die. The cylindrical drawing die at least includes a tapered entrance (41) and a cylindrical sizing belt (42). The inner diameter of the tapered inlet (41) gradually decreases from the outside to the inside. The inner diameter of the sizing band (42) is consistent with the minimum inner diameter of the tapered inlet (41). The inner diameter of the sizing band (42) is less than or equal to the metal wire busbar before pre-deformation. wire diameter.

9. A method for preparing a metal wire manufacturing device as claimed in claim 8, characterized in that it at least includes the following steps:

a) Pre-deformation: Pass the straight metal wire busbar through the wire wheel (2), and then enter the pre-deformation mechanism (3) to perform at least one pre-deformation process of the metal wire to process the pre-deformed metal wire containing plastic distortion or surface concave and convex deformation. ;

b) Deformation strengthening: The drawing driving wheel (72) pulls the pre-deformed metal wire through the deformation strengthening mechanism (4), and forms a self-constructing metal wire after passing through the sizing belt;

c) Take-up: The metal wire with self-structuring ability is wound and taken up sequentially through the take-up constant tension system (5) and the take-up device (6).

10. A device for manufacturing metal wire according to any one of claims 1 to 7, characterized by: at least including a wire passing wheel (2), a surface hardness isomerization device (8), and a wire take-up arranged in sequence Constant tension system (5) and take-up device (6); the surface hardness isomerization device (8) includes at least one metal wire surface heating device that works intermittently in time and performs surface heating on the metal wire passing through it. , the heating temperature of the surface of the metal wire is completely the same or partially the same in all directions around the axis of the metal wire.

11. The metal wire manufacturing device according to claim 10, characterized in that: the surface hardness isomerization device further includes a metal wire surface cooling device placed behind the metal wire surface heating device for speed control or rapid cooling of the metal wire surface. device.

12. A method for preparing a metal wire manufacturing device as claimed in claim 10 or 11, characterized in that it at least includes the following steps:

a) Perform surface hardness isomerization on the straight metal wire busbar: Pass the metal wire busbar through the wire wheel (2), and then enter the surface hardness isomerization device (8) for at least one surface hardness isomerization treatment to form a self-structured The surface hardness isomerization treatment is to use the metal wire surface heating device to intermittently heat part of the surface of the passing metal wire to the tempering critical temperature of the metal wire or above the tempering critical temperature, and keep it warm for a certain period of time. Then control its speed or cool it quickly;

b) Take-up: The metal wire with self-structuring ability is wound and taken up sequentially through the take-up constant tension system (5) and the take-up device (6).