Drawing system and drawing method for a diamond wire busbar

Abstract

The application provides a drawing system and a drawing method for a diamond wire bus. The drawing system comprises a wire feeding device, a wire blank heating device, a coating device, a drawing device, a drawing zone heating device and a wire collecting device. The wire feeding device is used to output a metal wire blank. The wire collecting device is used to receive a metal wire product. The wire blank heating device is arranged between the wire feeding device and the wire collecting device and is used to heat the metal wire blank. The coating device is arranged between the wire blank heating device and the wire collecting device and comprises a coating part mounting seat and a coating part arranged on the coating part mounting seat. The coating part is used to coat lubricating liquid on the metal wire blank passing through the coating part. The drawing device is arranged between the coating device and the wire collecting device and comprises a die mounting seat and a drawing die arranged on the die mounting seat. The drawing die is used to draw the metal wire blank coated with the lubricating liquid passing through the drawing die and draw the metal wire blank into the metal wire product. The drawing zone heating device is used to heat the lubricating liquid output by the coating part and the drawing die.

Description

Technical Field

[0001] This application relates to the field of diamond wire cutting technology, and in particular to a drawing system and drawing method for diamond wire busbars. Background Technology

[0002] Diamond wire cutting (or simply diamond wire) is a cutting tool in which diamond micropowder is fixed to the surface of a diamond wire base through methods such as electroplating, resin bonding, or brazing. It utilizes the high hardness of diamond to achieve efficient and precise cutting. The diamond wire base is the core substrate for manufacturing diamond wire cutting; it is the metal wire base that carries the diamond abrasive grains and directly affects the strength, durability, and cutting performance of the diamond wire cutting. Diamond wire bases require small diameter and high strength. In recent years, due to the ultra-high strength (tensile strength can reach over 6000 MPa), ultra-fine diameter (diameter can be less than or equal to Φ0.030 mm), high temperature resistance, corrosion resistance, and fatigue resistance, tungsten wire has begun to replace high-carbon steel wire as the base for diamond wire cutting of photovoltaic silicon wafers, semiconductor silicon carbide wafers, and other hard and brittle materials, showing broad market prospects.

[0003] Due to the high stiffness and poor plasticity of tungsten wire, traditional tungsten wire drawing methods typically employ hot drawing. Hot drawing requires softening the metal before drawing, which places high demands on both the tungsten wire itself and the drawing die. Ordinary lubricants are insufficient to meet the temperature requirements of hot drawing. Therefore, related technologies often use solid lubricants for hot drawing of tungsten wire, such as graphite hot drawing processes.

[0004] like Figure 1 As shown, the tungsten wire hot drawing system using graphite hot drawing technology includes a wire feeding device 10', a first wire spool 20', a graphite emulsion coating device 30', a heating device 40', a wire drawing device 50', a second wire spool 60', a traction wheel 70', an encoder 80', and a wire take-up device 90'. Combined with... Figure 1 and Figure 2 The graphite hot drawing process uses graphite emulsion as a lubricant. Tungsten filaments, such as Φ0.39mm or finer black tungsten filaments, are first coated with graphite emulsion by a graphite coating device 30', then heated and dried at high temperature by a heating device 40', and then processed into high-strength tungsten filaments by multi-die drawing by a drawing device 50'.

[0005] When drawing tungsten filaments using the graphite hot drawing process, the graphite emulsion requires drying time, resulting in a slow drawing speed, generally not exceeding 150 meters per minute, leading to low production efficiency. Furthermore, because the graphite powder in the graphite emulsion is a solid particle, it is difficult to provide uniform 360° lubrication to the tungsten filament surface during the drawing process. This makes the tungsten filament prone to vibration during drawing, resulting in poor wire diameter and wire breakage.

[0006] To overcome the shortcomings of traditional hot drawing processes in the production of tungsten filaments, a novel electroplating and cold drawing process for tungsten filaments has been proposed. For example... Figure 3 As shown, the electroplating cold drawing process involves first electrolytically cleaning tungsten wires, such as black tungsten wires with a diameter of 0.39mm or less, and then electroplating a layer of brass as a lubricant onto their surface. Finally, at room temperature, the wires are drawn at high speed using a water tank drawing machine to produce high-strength tungsten wires. The electroplating cold drawing process uses a brass plating layer as the drawing lubricant, eliminating the time required for graphite emulsion drying. This allows for rapid and efficient drawing of tungsten wires finer than 0.035mm at speeds exceeding 600 meters per minute, with a low breakage rate, excellent wire diameter, higher strength, and better performance in final cutting. However, the electroplating cold drawing process adds an electroplating step, has higher environmental requirements, requires larger equipment investments, and results in higher drawing costs.

[0007] The above statements are for the purpose of providing background information in relation to this application only, and do not necessarily constitute prior art. Summary of the Invention

[0008] The purpose of this application is to provide a drawing system and method for diamond wire busbars, aiming to propose a new drawing system and method for metal wires that can be used for diamond wire busbars.

[0009] The first aspect of this application provides a drawing system for diamond wire busbars, the drawing system being configured to transport a metal wire blank and draw the metal wire blank into a metal wire product with a diameter smaller than the metal wire blank. The drawing system includes: a wire feeding device configured to output a metal wire blank; a wire take-up device configured to receive the metal wire product; a wire blank heating device disposed between the wire feeding device and the wire take-up device, configured to heat the metal wire blank; a coating device disposed between the wire blank heating device and the wire take-up device, including a coating part mounting base and a coating part disposed on the coating part mounting base, the coating part being configured to coat the metal wire blank passing through the coating part with a lubricant; a drawing device disposed between the coating device and the wire take-up device, including a die mounting base and a drawing die disposed on the die mounting base, the drawing die being configured to draw the lubricant-coated metal wire blank passing through the drawing die and draw the metal wire blank into the metal wire product; and a drawing zone heating device configured to heat the lubricant output from the coating part and the drawing die.

[0010] In some embodiments of the drawing system for diamond wire busbars, the temperature of the heating zone of the wire blank heating device is in the range of 200°C to 1200°C, preferably in the range of 400°C to 950°C; and / or the length of the heating zone of the wire blank heating device along the conveying direction of the metal wire blank is in the range of 0.2m to 2m, preferably in the range of 0.4m to 1.2m; and / or the drawing zone heating device is configured to heat the lubricant to a temperature range of 50°C to 400°C, preferably in the range of 70°C to 350°C; and / or the drawing zone heating device is configured to heat the drawing die to a temperature range of 200°C to 500°C, preferably in the range of 250°C to 400°C.

[0011] In some embodiments of the drawing system for diamond wire busbars, the drawing zone heating device includes a lubricant heating section for heating the lubricant and a die heating section for heating the drawing die; and / or the drawing zone heating device includes a universal heating section that simultaneously heats the lubricant and the drawing die.

[0012] In some embodiments of the drawing system for diamond wire busbars, the lubricant coating device is arranged adjacent to or integrated with the drawing device so that the metal wire blank output from the coating section directly enters the drawing die.

[0013] In some embodiments of the drawing system for diamond wire busbars, the drawing system further includes a recovery device configured to receive redundant lubricant not coated on the metal wire blank output by the lubricant coating device and stripped lubricant scraped off by the drawing die, and to transport the received redundant lubricant and stripped lubricant to the lubricant coating device via a delivery pump.

[0014] In some embodiments of the diamond wire drawing system, the recycling device includes a recycling box. The recycling box is spaced apart from at least one of the coating section mounting base and the mold mounting base; and / or the recycling box is integrally formed with at least one of the coating section mounting base and the mold mounting base.

[0015] In some embodiments of the diamond wire drawing system, the coating part mounting base, the recycling box, and the mold mounting base are integrally arranged. The recycling box is located between the coating part mounting base and the mold mounting base and below the coating part and the drawing die. The coating part mounting base and the mold mounting base constitute part of the wall of the recycling box.

[0016] In some embodiments of the drawing system for diamond wire busbars, the drawing zone heating device includes a universal heating unit that simultaneously heats the lubricant and the drawing die, the universal heating unit being configured to heat the lubricant and the drawing die in the recovery tank by heating the die mounting base.

[0017] In some embodiments of the drawing system for diamond wire busbars, the coating section includes a liquid outlet, the liquid outlet includes a lubricant outlet, and the metal wire blank is spaced apart from the lubricant outlet to allow the flow of lubricant output through the lubricant outlet.

[0018] In some embodiments of the drawing system for diamond wire busbars, the liquid outlet includes a guide groove extending along the conveying direction of the metal wire blank, the lubricant outlet is recessed relative to the top surface of the guide groove and communicates with the guide groove, and the metal wire blank passes through the guide groove.

[0019] In some embodiments of the drawing system for diamond wire busbars, the distance between the heating end position of the wire blank heating device and the coating start position of the coating part is 0.01m to 0.5m, preferably 0.015m to 0.1m.

[0020] In some embodiments of the drawing system for diamond wire busbars, the maximum operating temperature of the lubricant is greater than or equal to 200°C, preferably greater than or equal to 300°C; and / or the lubricant is a polyalphaolefin, ester oil, silicone oil, or perfluoropolyether oil.

[0021] In some embodiments of the drawing system for diamond wire busbars, the take-up device is configured to receive the metal wire product at a take-up speed ranging from 200 m / min to 1200 m / min, preferably from 360 m / min to 800 m / min.

[0022] In some embodiments of the drawing system for diamond wire busbars, the drawing die is configured to receive and draw metal wire blanks with a diameter of 0.03 mm to 0.39 mm, preferably 0.05 mm to 0.18 mm; and / or the drawing die is configured to output metal wire products with a diameter of 0.018 mm to 0.18 mm, preferably 0.024 mm to 0.1 mm.

[0023] In some embodiments of the drawing system for diamond wire busbars, the heating zone of the wire blank heating device includes multiple heating channels for the metal wire blank to pass through; the coating device includes multiple coating sections corresponding one-to-one with the multiple heating channels; the drawing device includes multiple stages of drawing dies corresponding one-to-one with the multiple heating channels; the drawing system is configured such that the metal wire blank is sequentially heated by the heating channels corresponding to each stage of the drawing die and coated with the lubricant by the coating sections before entering each stage of the drawing die.

[0024] The second aspect of this application provides a method for drawing diamond wire busbars, employing the drawing system for diamond wire busbars described in the first aspect of this application to draw a metal wire blank into a metal wire product with a diameter smaller than the metal wire blank, comprising: heating the metal wire blank by the wire blank heating device; coating the outer periphery of the metal wire blank heated by the wire blank heating device with a lubricating liquid heated by the drawing zone heating device through the coating part; and drawing the lubricated metal wire blank through a drawing die heated by the drawing zone heating device to form the metal wire product.

[0025] A third aspect of this application provides a method for drawing diamond wire busbars, comprising: heating a metal wire blank; heating a lubricating fluid; heating a drawing die; coating the heated lubricating fluid onto the outer periphery of the heated metal wire blank; and drawing the lubricated metal wire blank through the heated drawing die to form a metal wire product with a diameter smaller than that of the metal wire blank.

[0026] In some embodiments of the drawing method for diamond wire busbars, the temperature of the heating zone of the heated metal wire blank is in the range of 200°C to 1200°C, preferably in the range of 400°C to 950°C; and / or the length of the heating zone of the heated metal wire blank along the conveying direction of the metal wire blank is in the range of 0.2m to 2m, preferably in the range of 0.4m to 1.2m; and / or the temperature of the heated lubricant is in the range of 50°C to 400°C, preferably in the range of 70°C to 350°C; and / or the temperature of the heated drawing die is in the range of 200°C to 500°C, preferably in the range of 250°C to 400°C.

[0027] In some embodiments of the drawing method for diamond wire busbars, coating the outer periphery of the metal wire blank with a heated lubricant includes passing the metal wire blank through a flow of the lubricant.

[0028] In some embodiments of the drawing method for diamond wire busbars, the maximum operating temperature of the lubricant is greater than or equal to 200°C, preferably greater than or equal to 300°C; and / or the lubricant is a polyalphaolefin, ester oil, silicone oil, or perfluoropolyether oil.

[0029] In some embodiments of the drawing method for diamond wire busbars, the take-up speed of the metal wire product is 200 m / min to 1200 m / min, preferably 360 m / min to 800 m / min.

[0030] In some embodiments of the drawing method for diamond wire busbars, the diameter of the metal wire blank is 0.03 mm to 0.39 mm, preferably 0.05 mm to 0.18 mm; and / or the diameter of the metal wire product is 0.018 mm to 0.18 mm, preferably 0.024 mm to 0.1 mm.

[0031] In some embodiments of the drawing method for diamond wire busbars, the metal wire blank is drawn into the metal wire product through a multi-stage heated drawing die, wherein the metal wire blank is heated and coated with a heated lubricant on the outer periphery of the metal wire blank before entering each stage of the drawing die.

[0032] In some embodiments of the drawing method for diamond wire busbars, the metal wire blank is a black tungsten wire.

[0033] Based on the drawing system and method for diamond wire busbars provided in this application, a wire blank heating device heats the metal wire blank upstream of the coating device, increasing the temperature of the metal wire blank, especially the core temperature. Then, a heated lubricant and a drawing die are passed through the system. After being heated, the metal wire blank is coated with heated lubricant, placing it in a state above room temperature. It is then drawn in an environment above room temperature after entering the heated drawing die. Compared to cold drawing processes, this reduces the stiffness and increases the plasticity of the metal wire blank during drawing, making it easier to draw and reducing wear on the drawing die. Compared to hot drawing processes... The lubricant is easy to distribute evenly around the metal wire blank, which can overcome the problems of wire product vibration, poor wire diameter and wire breakage caused by the difficulty of uniform lubrication of graphite emulsion lubricant. The metal wire product has a uniform diameter, good surface quality, uniform stress without curling, and higher strength than the hot drawing process. It can achieve a drawing speed of more than 150m / min and a low wire breakage rate. Since it does not require the time to heat and dry the graphite emulsion coated on the surface of the metal wire blank as in the hot drawing process or the electroplating step as in the electroplating cold drawing process, it has a strong cost advantage. Thus, it can balance the product quality, production efficiency and production cost of metal wire products.

[0034] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0035] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0036] Figure 1 This is a schematic diagram of the drawing system for diamond wire busbars using the graphite hot drawing process of related technologies.

[0037] Figure 2 This is a schematic diagram of the graphite hot drawing process in related technologies.

[0038] Figure 3 This is a schematic diagram of the electroplating and cold drawing process of related technologies.

[0039] Figure 4 This is a schematic diagram of the structure of a drawing system for diamond wire busbar according to an embodiment of this application.

[0040] Figure 5 for Figure 4 The diagram shows the structure of an integrated base for a diamond wire drawing system.

[0041] Figure 6 for Figure 5 The diagram shows a top view of the integrated base structure.

[0042] Figure 7 This is a schematic flowchart of a method for drawing diamond wire busbars according to an embodiment of this application.

[0043] Figure 1 In the figures, the labels represent:

[0044] 10', Wire feeding device;

[0045] 20', First reel;

[0046] 30' Graphite coating device;

[0047] 40' Heating device;

[0048] 50', wire drawing device;

[0049] 60', Second reel;

[0050] 70', Traction wheel;

[0051] 80', Encoder;

[0052] 90', take-up device.

[0053] Figures 4 to 6 In the figures, the labels represent:

[0054] 10. Wire feeding device;

[0055] 20. First reel;

[0056] 30. Wire rod heating device;

[0057] 40. Integrated wire drawing device; 41. Integrated base; 411. Coating device; 4111. Coating section mounting base; 4112. Coating section; 4113. Lubricating fluid outlet; 4114. Guide channel; 412. Drawing device; 4121. Mold mounting base; 4122. Mold mounting groove; 4123. Heating pipe hole; 4124. Thermocouple mounting hole; 413. Recovery device; 4131. Recovery box; 4132. Coating section mounting base inlet; 4133. Recovery box outlet; 419. Wire inlet groove; 410. Mounting hole; 42. Mold base cover;

[0058] 50. Second reel;

[0059] 60. Traction wheel;

[0060] 70. Encoder;

[0061] 80. Retractor;

[0062] 100. Pulling system;

[0063] 200. Metal wire blank;

[0064] 300. Metal wire products. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0066] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0067] In the description of this application, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0068] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0069] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0070] In this application, black tungsten wire refers to a semi-finished tungsten wire produced by a graphite hot-drawing process. Its surface is coated with graphite residue left on the tungsten wire after drawing, giving it a black color; hence the name black tungsten wire. Similarly, molybdenum wire produced by a graphite hot-drawing process is called black molybdenum wire.

[0071] In this application, wires with a diameter of 0.050 mm or less are referred to as fine wires. For example, tungsten wires with a diameter of 0.050 mm or less are referred to as tungsten fine wires. Similarly, molybdenum fine wires and metal fine wires also meet this diameter requirement.

[0072] like Figures 4 to 6As shown, this application embodiment provides a drawing system 100 for diamond wire busbars. The drawing system 100 is configured to transport a metal wire blank 200 and draw the metal wire blank 200 into a metal wire product 300 with a diameter smaller than the metal wire blank 200. The drawing system 100 includes a wire feeding device 10, a wire blank heating device 30, a coating device 411, a drawing device 412, a drawing zone heating device, and a take-up device 80. The wire feeding device 10 is configured to output the metal wire blank 200. The take-up device 80 is configured to receive the metal wire product 300. The wire blank heating device 30 is disposed between the wire feeding device 10 and the take-up device 80 and is configured to heat the metal wire blank 200. The coating device 411 is disposed between the wire blank heating device 30 and the take-up device 80 and includes a coating part mounting base 4111 and a coating part 4112 disposed on the coating part mounting base 4111. The coating section 4112 is configured to coat the metal wire blank 200 passing through the coating section 4112 with lubricant. The drawing device 412 is disposed between the coating device 411 and the take-up device 80, and includes a die mounting base 4121 and a drawing die disposed on the die mounting base 4121. The drawing die is configured to draw the lubricated metal wire blank 200 passing through the drawing die and draw the metal wire blank 200 into a metal wire product 300. The drawing zone heating device is configured to heat the lubricant output from the coating section 4112 and the drawing die.

[0073] In some embodiments of the drawing system 100 for diamond wire busbars, the drawing device 412 may include a single-stage drawing die or a multi-stage drawing die.

[0074] The drawing system for diamond wire busbars provided in this application overcomes the limitation of traditional hot drawing processes that require graphite emulsion as a lubricant. By setting up a wire blank heating device 30 to heat the metal wire blank 200, and by setting up a drawing zone heating device to heat the lubricant and drawing die, the wire blank heating device 30 heats the metal wire blank 200 upstream of the coating device 411, increasing the temperature of the metal wire blank 200, especially the core temperature. After the wire blank is heated, it is coated with heated lubricant, placing it in a state above room temperature. Then, after entering the heated drawing die, it is drawn in an environment above room temperature. Compared to cold drawing processes, this reduces the stiffness of the metal wire blank during drawing compared to room temperature, and increases its plasticity. It is strong, easy to draw, and helps reduce wear on drawing dies. Compared with hot drawing, the lubricant is easier to distribute evenly around the metal wire blank, which can overcome the problems of wire vibration, poor wire diameter and wire breakage caused by the difficulty of uniform lubrication of graphite emulsion lubricant. The metal wire product has a uniform diameter, good surface quality, uniform stress and no curling, and higher strength than hot drawing. It can also achieve a drawing speed of more than 150m / min and a low wire breakage rate. Since it does not require the time to heat and dry the graphite emulsion coated on the surface of the metal wire blank as in hot drawing or the electroplating process as in electroplating cold drawing, it has a strong cost advantage, thus balancing the product quality, production efficiency and production cost of metal wire products.

[0075] In some embodiments of the drawing system 100 for diamond wire busbars, the temperature of the heating zone of the wire blank heating device 30 is in the range of 200°C to 1200°C, preferably in the range of 400°C to 950°C; and / or the length of the heating zone of the wire blank heating device 30 along the conveying direction of the metal wire blank 200 is in the range of 0.2 meters to 2 meters, preferably in the range of 0.4 meters to 1.2 meters; and / or the drawing zone heating device is configured to heat the lubricant to a temperature range of 50°C to 400°C, preferably in the range of 70°C to 350°C; and / or the drawing zone heating device is configured to heat the drawing die to a temperature range of 200°C to 500°C, preferably in the range of 250°C to 400°C.

[0076] The temperature of the heating zone of the wire rod heating device 30 and the length of the heating zone along the conveying direction of the metal wire rod 200 can both be used to adjust the temperature of the metal wire rod 200 when coated with lubricant. These two parameters, in conjunction with the conveying speed of the metal wire rod 200 and the distance between the heating end position of the wire rod heating device 30 and the coating start position of the coating section 4112, can control the temperature of the metal wire rod 200 when coated with lubricant. By setting a temperature of the metal wire rod 200 that is more compatible with the temperature of the lubricant within the maximum operating temperature range of a wider variety of selectable lubricants, the drawing process can proceed smoothly, thus ensuring the quality of the metal wire products.

[0077] The temperature of the heating zone of the wire rod heating device 30 is in the range of 200°C to 1200°C, preferably in the range of 400°C to 950°C. This is beneficial for obtaining temperature parameters that match the conveying speed of the metal wire rod 200, the maximum working temperature of the lubricant, and the length of the heating zone along the conveying direction of the metal wire rod 200 within a suitable temperature adjustment range, so that the temperature of the metal wire rod 200 is in a more reasonable range during drawing.

[0078] For example, the temperature of the heating zone of the wire rod heating device 30 can be 200℃, 300℃, 400℃, 500℃, 550℃, 600℃, 650℃, 700℃, 750℃, 800℃, 850℃, 900℃, 950℃, 1000℃, 1100℃, 1200℃, etc.

[0079] The length of the heating zone of the wire rod heating device 30 along the conveying direction of the metal wire rod 200 is in the range of 0.2m to 2m, preferably in the range of 0.4m to 1.2m, which is conducive to the reasonable configuration of the overall size of the wire rod heating device 30 and the reasonable temperature control of the metal wire rod 200 during drawing.

[0080] For example, the length of the heating zone of the wire rod heating device 30 can be 0.2m, 0.3m, 0.4m, 0.45m, 0.5m, 0.55m, 0.6m, 0.65m, 0.7m, 0.75m, 0.8m, 0.9m, 1m, 1.2m, 1.5m, 2m, etc.

[0081] The temperature of the lubricant and the heating temperature of the drawing die can be adjusted by the parameters of the heating device in the drawing zone. For example, if the heating device in the drawing zone is an electric heating tube, the number of electric heating tubes participating in the heating or the power and heating time of the electric heating tubes can be adjusted. If the heating device in the drawing zone is a fluid heating device, the temperature and flow rate of the heating fluid can be adjusted.

[0082] The lubricant is heated to a temperature range of 50°C to 400°C, preferably to a temperature range of 70°C to 350°C. This provides a wide range of lubricant options, allowing for the setting of a temperature more suitable for drawing metal wire blanks within the highest operating temperature range of the lubricant. This facilitates the use of lubricants with excellent lubrication performance and low cost for lubricating metal wire blanks.

[0083] For example, provided the maximum operating temperature of the lubricant is tolerable, the lubricant can be heated to temperatures of 50℃, 70℃, 90℃, 100℃, 125℃, 160℃, 175℃, 195℃, 200℃, 225℃, 250℃, 275℃, 300℃, 320℃, 350℃, 375℃, 400℃, etc.

[0084] Heating the drawing die to a temperature range of 200°C to 500°C, preferably to a temperature range of 250°C to 400°C, is suitable for selecting a drawing die temperature that is more compatible with the temperature of the lubricant and the temperature of the metal wire blank, which helps to draw the metal wire blank smoothly and thus helps to ensure the quality of the metal wire product.

[0085] For example, under conditions matching the highest operating temperature of the lubricant, drawing dies can be heated to temperatures of 200℃, 225℃, 250℃, 270℃, 290℃, 300℃, 330℃, 350℃, 375℃, 400℃, 420℃, 450℃, 475℃, 500℃, etc.

[0086] In some embodiments of the drawing system 100 for diamond wire busbars, the drawing zone heating device includes a lubricant heating section for heating the lubricant and a die heating section for heating the drawing die; and / or the drawing zone heating device includes a universal heating section that simultaneously heats the lubricant and the drawing die.

[0087] The heating device in the drawing zone includes a lubricant heating section for heating the lubricant and a die heating section for heating the drawing die. This allows for separate control of the temperature of the lubricant and the temperature of the drawing die, ensuring that the temperature of the lubricant and the temperature of the drawing die are more accurately within their respective preset temperature ranges, thereby improving the quality stability of the metal wire products.

[0088] The heating device in the drawing zone includes a universal heating section that simultaneously heats the lubricant and the drawing die, which simplifies the equipment, reduces parameter adjustment steps, and thus helps ensure the quality of the metal wire products.

[0089] In some embodiments of the drawing system 100 for diamond wire busbars, the lubricant coating device 411 and the drawing device 412 are arranged adjacent to each other or integrated so that the metal wire blank 200 output from the coating part 4112 directly enters the drawing die.

[0090] The lubricant coating device 411 and the drawing device 412 are arranged adjacently and spaced apart or integratedly so that the metal wire blank 200 output from the coating section 4112 can directly enter the drawing die. This facilitates the maintenance of sufficient and uniform lubricant on the outer periphery of the metal wire blank 200 when it enters the drawing die, and helps to maintain the temperature of the metal wire blank 200 and the lubricant on it as much as possible, thereby facilitating the smooth completion of the drawing process and forming a high-quality metal wire product. The spaced arrangement of the coating section mounting base 4111 and the die mounting base 4121 allows for setting or adjusting the positions of the coating section mounting base 4111 and the die mounting base 4121 according to actual working parameters, so as to reasonably set or adjust the distance between the coating completion position of the coating section 4112 and the entrance of the drawing die, making the distance better match and adapt to actual needs.

[0091] The coating unit mounting base 4111 and the mold mounting base 4121 are integrated, which facilitates better and more direct lubrication, facilitates the recycling and reuse of lubricating fluid, simplifies the equipment, and reduces installation and commissioning work. In particular, it is beneficial to configure a universal heating unit that can simultaneously heat the lubricating fluid and the drawing die by the heating device in the drawing zone, thereby reducing the number of parameter adjustment steps.

[0092] In some embodiments of the drawing system 100 for diamond wire busbars, the drawing system 100 further includes a recovery device 413, which is configured to receive redundant lubricant not coated on the metal wire blank 200 output by the lubricant coating device 411 and the stripped lubricant scraped off by the drawing die, and to transport the received redundant lubricant and stripped lubricant to the lubricant coating device 411 via a delivery pump.

[0093] The drawing system 100 includes a recovery device 413, which receives redundant lubricant and delubricant and transports them to a lubricant coating device 411. This facilitates the reuse of the lubricant and the heat carried by the lubricant, thereby reducing the consumption of lubricant and energy and lowering the operating cost.

[0094] In some embodiments of the diamond wire drawing system 100, the recycling device 413 includes a recycling bin 4131. The recycling bin 4131 is spaced apart from at least one of the coating section mounting base 4111 and the mold mounting base 4121; and / or the recycling bin 4131 is integrally formed with at least one of the coating section mounting base 4111 and the mold mounting base 4121.

[0095] The recycling bin 4131 is spaced apart from at least one of the coating section mounting base 4111 and the mold mounting base 4121. This facilitates the coordination between the spaced coating section mounting base 4111 and the mold mounting base 4121, thereby allowing the positions of the coating section mounting base 4111 and the mold mounting base 4121 to be set or adjusted according to actual working parameters. This allows for the reasonable setting or adjustment of the distance between the coating completion position of the coating section 4112 and the entrance of the drawing die, so that the distance can better match and adapt to actual needs.

[0096] The recycling bin 4131 is integrally set with at least one of the coating part mounting base 4111 and the mold mounting base 4121, which helps to simplify the equipment, reduce installation and debugging work, and also helps to more effectively reuse the lubricant and the heat carried by the lubricant. Since the lubricant in the recycling bin 4131 can absorb the heat dissipation of the coating part mounting base 4111 and / or the mold mounting base 4121 integrally set with the recycling bin 4131, it is more conducive to reducing energy consumption.

[0097] In some embodiments of the diamond wire drawing system 100, the coating part mounting base 4111, the recycling box 4131 and the mold mounting base 4121 are integrally arranged. The recycling box 4131 is located between the coating part mounting base 4111 and the mold mounting base 4121 and is located below the coating part 4112 and the drawing die. The coating part mounting base 4111 and the mold mounting base 4121 constitute part of the box wall of the recycling box 4131.

[0098] The coating section mounting base 4111, the recovery box 4131, and the mold mounting base 4121 are integrated into one unit, with the recovery box 4131 located between the coating section mounting base 4111 and the mold mounting base 4121 and below the coating section 4112 and the drawing die. The coating section mounting base 4111 and the mold mounting base 4121 form part of the box wall of the recovery box 4131, which simplifies the equipment, reduces installation and debugging work, and facilitates the rapid return of redundant lubricant and delubricant to the recovery box 4131. This allows for more effective reuse of the lubricant and the heat carried by the lubricant. Since the lubricant in the recovery box 4131 can absorb the heat dissipation of the coating section mounting base 4111 and the mold mounting base 4121 integrated with the recovery box 4131, it is more conducive to reducing energy consumption. At the same time, it is convenient to configure a heating device for the drawing zone to heat the lubricant and the drawing die simultaneously, thereby reducing the number of parameter adjustment steps.

[0099] In some embodiments of the drawing system 100 for diamond wire busbars, the drawing zone heating device includes a universal heating unit that simultaneously heats the lubricant and the drawing die. The universal heating unit is configured to heat the lubricant and the drawing die in the recovery tank 4131 via the heating die mounting base 4121.

[0100] The general heating section is configured to heat the lubricant and drawing dies in the recovery box 4131 via the heating die mounting base 4121, which simplifies the equipment, reduces parameter adjustment steps, and thus helps ensure the quality of the metal wire products. When multiple coating sections are installed in the coating section mounting base 4111 and multiple sets of drawing dies are installed in the die mounting base 4121, it is beneficial to achieve multiple drawing passes for the same metal wire and improve wire drawing efficiency.

[0101] In some embodiments of the drawing system 100 for diamond wire busbars, the coating section 4112 includes a liquid outlet, which includes a lubricant outlet 4113. The metal wire blank 200 is spaced apart from the lubricant outlet 4113 to allow the flow of lubricant output through the lubricant outlet 4113.

[0102] The coating section 4112 includes a liquid outlet nozzle and a lubricant outlet 4113. The lubricant flow from the lubricant outlet 4113 through the metal wire blank 200 facilitates the complete and uniform coating of the lubricant on the outer periphery of the metal wire blank 200, thereby facilitating the smooth completion of the drawing process and forming a high-quality metal wire product. In some embodiments of the diamond wire drawing system 100, the liquid outlet nozzle includes a guide groove 4114 extending along the conveying direction of the metal wire blank 200. The lubricant outlet 4113 is recessed relative to the top surface of the guide groove 4114 and communicates with the guide groove 4114. The metal wire blank 200 passes through the guide groove 4114.

[0103] The outlet nozzle includes a guide groove 4114 extending along the conveying direction of the metal wire blank 200. The metal wire blank 200 passes through the guide groove 4114. When the metal wire blank 200 moves at a speed greater than that of conventional hot drawing processes, such as 600 m / min, it can drive the flow of lubricant from the lubricant outlet 4113 all the way to the drawing die inlet. This ensures that the outer periphery of the metal wire blank 200 is completely and uniformly coated with lubricant throughout the drawing process, thereby facilitating the smooth completion of the drawing process and forming a high-quality metal wire product.

[0104] In some embodiments of the drawing system 100 for diamond wire busbars, the distance between the heating end position of the wire blank heating device 30 and the coating start position of the coating part 4112 is 0.01m to 0.5m, preferably 0.015m to 0.1m.

[0105] The heating end position of the wire rod heating device 30 refers to the last position where the metal wire rod 200 has been heated, for example, in Figures 4 to 6 In the diamond wire drawing system 100 of the embodiment shown, the wire blank heating device 30 is a heating box with uniform temperature, and the heating end position of the wire blank heating device 30 is the wire blank outlet position of the heating box.

[0106] The coating start position of coating section 4112 refers to the position where the lubricant is just applied to the metal wire blank 200. For example, in Figures 4 to 6 In the diamond wire drawing system 100 of the illustrated embodiment, the coating start position corresponds to the edge of the guide groove 4114 near the wire blank heating device 30. Alternatively, in an alternative embodiment, if the coating section 4112 is provided with an outlet nozzle but not with a guide groove 4114, the coating start position corresponds to the edge of the lubricant outlet 4113 near the wire blank heating device 30.

[0107] The distance between the heating end position of the wire blank heating device 30 and the coating start position of the coating section 4112 is 0.01m to 0.5m, preferably 0.015m to 0.1m, so that the surface temperature of the metal wire blank 200 is reduced to below the maximum working temperature of the lubricant, but the core can still maintain a higher temperature, which is conducive to the smooth completion of the drawing process and the formation of a metal wire product with better quality.

[0108] For example, the distance between the heating end position of the wire blank heating device 30 and the coating start position of the coating section 4112 can be 0.01m, 0.25m, 0.05m, 0.075m, 0.08m, 0.1m, 0.18m, 0.2m, 0.25m, 0.3m, 0.35m, 0.4m, 0.45m, 0.5m, etc.

[0109] In some embodiments of the drawing system 100 for diamond wire busbars, the maximum operating temperature of the lubricant is greater than or equal to 200°C, preferably greater than or equal to 300°C; and / or the lubricant is a polyalphaolefin, ester oil, silicone oil, or perfluoropolyether oil.

[0110] The maximum operating temperature of the lubricant is greater than or equal to 200°C, preferably greater than or equal to 300°C, which allows the metal wire blank 200 to be drawn at a relatively high temperature of its own body and the temperature of the drawing die, thus making it easier to draw.

[0111] Polyalphaolefin, ester oil, silicone oil or perfluoropolyether oil have relatively high maximum operating temperatures and good lubrication performance, and can effectively lubricate metal wire blanks 200 within their respective maximum operating temperatures.

[0112] In some embodiments of the drawing system 100 for diamond wire busbars, the take-up device 80 is configured to receive the metal wire product 300 at a take-up speed ranging from 200 m / min to 1200 m / min, preferably from 360 m / min to 800 m / min.

[0113] The take-up device 80 is configured to receive the metal wire product 300 at a take-up speed ranging from 200 m / min to 1200 m / min, preferably from 360 m / min to 800 m / min. This facilitates maximizing the drawing speed without increasing the wire breakage rate, thereby improving work efficiency. Furthermore, it is beneficial to improve the strength of the metal wire product compared to a lower take-up speed.

[0114] The take-up speed can be, for example, 200 m / min, 250 m / min, 280 m / min, 300 m / min, 340 m / min, 360 m / min, 375 m / min, 400 m / min, 430 m / min, 450 m / min, 480 m / min, 500 m / min, 520 m / min, 545 m / min, 550 m / min, 580 m / min, 600 m / min, 650 m / min, 680 m / min, 700 m / min, 725 m / min, 760 m / min, 800 m / min, 820 m / min, 850 m / min, 870 m / min, 900 m / min, 920 m / min, 940 m / min, 960 m / min, 980 m / min, 1000 m / min, and 1050 m / min. 1100m / min, 1150m / min, 1200m / min, etc.

[0115] In some embodiments of the drawing system 100 for diamond wire busbars, the drawing die is configured to receive and draw a metal wire blank 200 with a diameter of 0.03 mm to 0.39 mm, preferably 0.05 mm to 0.18 mm; and / or the drawing die is configured to output a metal wire product 300 with a diameter of 0.018 mm to 0.18 mm, preferably 0.024 mm to 0.1 mm.

[0116] In this embodiment of the drawing system 100, when the diameter of the drawn metal wire blank 200 is 0.03 mm to 0.39 mm, preferably 0.05 mm to 0.18 mm and / or the diameter of the formed metal wire product 300 is 0.018 mm to 0.18 mm, preferably 0.024 mm to 0.1 mm, the metal wire blank 200 is more likely to obtain a uniform self-temperature due to heating and heat exchange with the lubricant, thereby obtaining a metal wire product of better quality suitable for diamond wire rods.

[0117] In some embodiments of the drawing system 100 for diamond wire busbars, the heating zone of the wire blank heating device 30 includes multiple heating channels for the metal wire blank 200 to pass through; the coating device 411 includes multiple coating portions 4112 corresponding to the multiple heating channels; the drawing device 412 includes multi-stage drawing dies corresponding to the multiple heating channels; the drawing system 100 is configured such that the metal wire blank 200 is sequentially heated by the heating channel corresponding to each stage of the drawing die and coated with lubricant by the coating portion 4112 before entering each stage of the drawing die.

[0118] The heating zone of the wire blank heating device 30 includes multiple heating channels, the coating device 411 includes multiple coating sections 4112, and the drawing device 412 includes multi-stage drawing dies, which facilitates multiple continuous and stable drawing operations in one unwinding and rewinding operation to produce finer metal wire products 300, thereby improving processing efficiency.

[0119] This application also provides a drawing method for diamond wire busbars. The drawing method uses the drawing system 100 for diamond wire busbars of this application to draw a metal wire blank 200 into a metal wire product 300 with a diameter smaller than the metal wire blank 200. The method includes: heating the metal wire blank 200 by a wire blank heating device 30; coating the outer periphery of the metal wire blank 200 heated by the wire blank heating device 300 with a lubricating liquid heated by a drawing zone heating device by a coating part 4112; and drawing the lubricated metal wire blank 200 through a drawing die heated by a drawing zone heating device to form the metal wire product 300.

[0120] This application embodiment also provides a method for drawing diamond wire busbars. The drawing system includes: heating a metal wire blank 200; heating a lubricating fluid; heating a drawing die; coating the outer periphery of the heated metal wire blank 200 with the heated lubricating fluid; and drawing the lubricated metal wire blank 200 through the heated drawing die to form a metal wire product 300 with a diameter smaller than that of the metal wire blank 200.

[0121] In some embodiments of the drawing method for diamond wire busbars, the temperature of the heated metal wire blank 200 is in the range of 80°C to 500°C, preferably in the range of 120°C to 400°C; and / or the temperature of the heated lubricant is in the range of 50°C to 400°C, preferably in the range of 70°C to 350°C; and / or the temperature of the heated drawing die is in the range of 200°C to 500°C, preferably in the range of 250°C to 400°C.

[0122] In some embodiments of the drawing method for diamond wire busbars, coating the outer periphery of the metal wire blank 200 with a heated lubricant includes passing the metal wire blank 200 through a flow of lubricant.

[0123] In some embodiments of the drawing method for diamond wire busbars, the maximum operating temperature of the lubricant is greater than or equal to 200°C, preferably greater than or equal to 300°C; and / or the lubricant is a polyalphaolefin, ester oil, silicone oil, or perfluoropolyether oil.

[0124] In some embodiments of the drawing method for diamond wire busbars, the take-up speed of the metal wire product 300 is 200 m / min to 1200 m / min, preferably 360 m / min to 800 m / min.

[0125] In some embodiments of the drawing method for diamond wire busbars, the diameter of the metal wire blank 200 is 0.03 mm to 0.39 mm, preferably 0.05 mm to 0.18 mm; and / or the diameter of the metal wire product 300 is 0.018 mm to 0.18 mm, preferably 0.024 mm to 0.1 mm.

[0126] In some embodiments of the drawing method for diamond wire busbars, the metal wire blank 200 is drawn into a metal wire product 300 through a multi-stage heated drawing die, wherein the metal wire blank 200 is heated and a heated lubricant is coated on the outer periphery of the metal wire blank 200 before entering each stage of the drawing die.

[0127] The drawing method for diamond wire busbars in the above embodiments of this application has the advantages of the drawing system for diamond wire busbars corresponding to the above embodiments of this application.

[0128] In some embodiments of the drawing method for diamond wire busbars, the metal wire blank 200 is a black tungsten wire. For example, in some embodiments, it can be a black tungsten wire with a diameter less than or equal to Φ0.39 mm.

[0129] The surface of the black tungsten wire is coated with graphite emulsion that remains on the tungsten wire after hot drawing in a graphite hot drawing process. Therefore, the black tungsten wire itself has certain lubricating properties. After coating the surface of the black tungsten wire with lubricant, the lubricant covers the outer periphery of the black tungsten wire and fills the micro-spaces between the graphite emulsions remaining on the tungsten wire. This effectively compensates for the uneven distribution of graphite emulsion and increases the ability of the lubricant to adhere to the black tungsten wire. The lubricating effect after coating with lubricant is stronger than that of tungsten wire without graphite emulsion residue (also referred to as white tungsten wire in this application). This facilitates the smooth progress of the drawing process and improves the product quality of tungsten filaments.

[0130] The following combination Figures 4 to 7 The drawing system and method for diamond wire busbars in this application are further illustrated by taking the drawing of tungsten filaments that can be used in diamond wire busbars as an example.

[0131] The drawing system 100 for diamond wire busbars in this embodiment is used to draw a metal wire blank 200 into a metal wire product 300 with a diameter smaller than that of the metal wire blank 200. For example... Figures 4 to 7 As shown, the diamond wire busbar drawing system 100 along... Figure 4 The wire feeding device 10, first wire spool 20, wire blank heating device 30, integrated wire drawing device 40, second wire spool 50, traction wheel 60, encoder 70, and take-up device 80 are arranged in a roughly left-to-right direction. The drawing system 100 also includes a control device (not shown).

[0132] The wire feeding device 10 outputs the metal wire blank 200. The first wire spool 20 tensions the metal wire blank 200. The wire blank heating device 30 heats the metal wire blank 200. The integrated wire drawing device 40 coats the metal wire blank 200 with heated lubricant and then draws it into a metal wire product 300 through a heated drawing die. The second wire spool 50 tensions the metal wire product 300. The traction wheel 60 provides traction force to the metal wire product 300. The encoder 70 detects the take-up speed of the metal wire product 300. The encoder 70 and the traction wheel 60 are respectively connected to a control device to control the take-up speed and tension of the metal wire product 300. The take-up device 80 receives the metal wire product 300.

[0133] The integrated wire drawing device 40 includes an integrated base 41 and a mold cover 42 covering the integrated base 41. The coating device 411, the drawing device 412, the recycling device 413, and the drawing zone heating device (not shown) are all integrated or installed on the integrated wire drawing device 40.

[0134] The integrated base 41 mainly includes a coating section mounting base 4111 of the coating device 411, multiple coating sections 4112 disposed on the coating section mounting base 4111, a mold mounting base 4121 of the drawing device 412, and a recycling box 4131 of the recycling device 413. The coating section mounting base 4111, the multiple coating sections 4112, the mold mounting base 4121, and the recycling box 4131 are integrally formed. The recycling box 4131 is located between the coating section mounting base 4111 and the mold mounting base 4121, and is located below the coating sections 4112 and the drawing mold. The coating section mounting base 4111 and the mold mounting base 4121 constitute part of the box wall of the recycling box 4131.

[0135] The coating section 4112 includes a nozzle, above which a lubricant outlet 4113 and a guide channel 4114 extending along the conveying direction of the metal wire blank 200 are formed. The lubricant outlet 4113 is recessed relative to the top surface of the guide channel 4114 and communicates with the guide channel 4114. The metal wire blank 200 passes through the guide channel 4114. A portion of the redundant lubricant flowing out of the lubricant outlet 4113 that fails to be carried away from the coating section 4112 by the metal wire blank 200 flows back to the recovery tank 4131 along the guide channel 4114, while the remainder falls onto the top surface of the nozzle and flows back to the recovery tank 4131. Thus, the recovery and recycling of redundant lubricant can be achieved without adding any components or performing any operations. When the metal wire blank 200 passes through the guide groove 4114, the lubricant in the guide groove 4114 will also participate in the lubricant coating of the metal wire blank 200, so that the metal wire blank 200 can be fully coated with lubricant even when it passes through the coating section 4112 at a speed of more than 150 m / min.

[0136] Multiple mold mounting slots 4122 are formed on the mold mounting base 4121, each corresponding to a plurality of coating portions 4112. Each mold mounting slot 4122 can accommodate a drawing die (not shown). The structure of the drawing die can be that of existing drawing dies, and its specifications can be selected according to the specifications of the metal wire blank and the metal wire product. In this embodiment, the drawing die is, for example, a multi-stage diamond die. Diamond dies have high hardness, good wear resistance, and can be used for a long time. When the metal wire blank 200 carrying lubricant enters the drawing die, as the die orifice narrows, most of the lubricant on the metal wire blank 200 is scraped off, forming a stripped lubricant. This stripped lubricant can flow directly back to the recycling tank 4131 along the orifice of the drawing die, achieving the recycling and reuse of the stripped lubricant without adding any components or performing any operations.

[0137] The mold mounting base 4121 is also provided with two heating tube holes 4123, and an electric heating tube (not shown) can be inserted into each heating tube hole 4123. In this embodiment, the two electric heating tubes constitute the general heating part of the drawing zone heating device.

[0138] It should be noted that the heating device in the drawing zone can be configured in other forms. For example, more or fewer electric heating tubes can be set, a flow channel can be set at the position of the integrated base 41 that needs to be heated, and a hot fluid of a certain temperature and flow rate can be introduced into the flow channel.

[0139] The mold mounting base 4121 is also provided with a thermocouple mounting hole 4124, in which a thermocouple is installed. Both the thermocouple and the electric heating tube are electrically connected to the control device to control the temperature of the mold mounting base, thereby simultaneously controlling the temperature of the drawing die and the temperature of the lubricant in the return oil tank 4131.

[0140] The recovery device 413 also includes a coating section mounting seat inlet 4132 provided on the coating section mounting seat 4111 and a recovery box outlet 4133 provided on the recovery box 4131. Lubricating fluid pipelines (not shown) are installed at the coating section mounting seat inlet 4132 and the recovery box outlet 4133. A delivery pump is installed on the lubricating fluid pipeline. The lubricating fluid pipeline may also be equipped with flow regulating valves and / or pressure regulating valves and / or check valves to regulate the lubricating fluid dynamic parameters. A filter device may also be installed to purify the lubricating fluid, and a lubricating fluid heating section in the drawing zone may be installed to finely regulate the lubricating fluid temperature. The flow rate and pressure of the lubricating fluid outlet 4113 can be adjusted by regulating the pumping pressure of the delivery pump and / or the opening of the regulating valve, thereby controlling the size of the lubricating fluid flow. Preferably, the lubricating fluid flow at the lubricating fluid outlet 4113 is controlled so that the height of the lubricating fluid flow is near the top surface of the guide channel, so as to minimize the consumption of lubricating fluid while ensuring sufficient lubrication of the metal wire blank 200, thereby saving operating costs.

[0141] To facilitate the smooth entry of the metal wire blank 200 into the integrated wire drawing device 40, the integrated base 41 is provided with a plurality of wire inlet grooves 419 corresponding to a plurality of coating sections 4112 at one end. In addition, to securely mount the integrated wire drawing device 40, the integrated base 41 is also provided with a plurality of mounting holes 410 for connection with mounting brackets.

[0142] In this embodiment, the wire rod heating device 30 is a heating furnace with a heating zone including multiple heating channels for the passage of the metal wire rod 200. The coating device 411 includes multiple coating sections 4112 corresponding to each of the multiple heating channels. The drawing device 412 includes multiple die mounting slots 4122 corresponding to each of the multiple heating channels, which can accommodate multi-stage drawing dies. Before entering each stage of the drawing die, the metal wire rod 200 is sequentially heated by the heating channel corresponding to that stage of the drawing die and coated with lubricant by the coating section 4112.

[0143] The control device in this application embodiment can be implemented as a general-purpose processor, programmable logic controller (PLC), digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof for performing the functions described in this disclosure.

[0144] In some embodiments, the drawing system 100 for diamond wire busbars may further include a display device and an input / output device connected to a control device. The display device is used to display the operating parameters of the drawing system 100, such as the temperature of the drawing die, the wire winding speed, the internal temperature of the wire blank heating device, and the temperature of the lubricating fluid.

[0145] like Figure 7 As shown in the drawing method for diamond wire busbars in this embodiment of the application, a black tungsten wire with a diameter Φ of 0.39 mm or less is used as the metal wire blank 200. After the metal wire blank 200 is heated, it is coated with a heating lubricant. After the lubricant is applied to the outer periphery of the metal wire blank 200, it is directly drawn into a drawing die for multi-die drawing to produce a finer tungsten wire as the metal wire product 300. The wire is then wound up to obtain a high-strength tungsten wire.

[0146] The temperatures at which the metal wire blank 200 is heated in the wire blank heating device 30, the temperatures at which the lubricant is heated, and the temperatures at which the drawing die is heated are all preferably lower than the maximum operating temperature of the lubricant, the temperature of the lubricant coated on the outer periphery of the metal wire blank 200, and the temperature of the lubricant that enters the drawing die with the metal wire blank 200. This is to avoid affecting the normal working performance of the lubricant and to allow the lubricant to be used for a long time.

[0147] The measured data of tungsten wire drawing with different parameters on the diamond wire drawing system 100 of the above embodiments using the drawing method for diamond wires of the above embodiments show that the production efficiency and product quality of the drawing method of the present application embodiments are better than those of tungsten wire products of the same diameter formed by graphite hot drawing process using tungsten wire blanks under the same conditions.

[0148] Using tungsten wire as the metal wire blank material Figures 4 to 6 Taking the tungsten wire drawing system of the illustrated embodiment as an example, when the lubricant used is perfluoropolyether oil, the lubricant temperature is 80°C, the heating zone length of the wire blank heating device is 0.4m, and the drawing die temperature is 300°C, when different heating zone temperatures and winding speeds are used in the process of producing tungsten wire products of different diameters from tungsten wire blanks, the surface quality and tensile strength of the tungsten wire products are all relatively good. The specific parameters of different examples are shown in the table below.

[0149] Although the foregoing embodiments of this application use tungsten wire as an example to illustrate the drawing system and drawing method for diamond wire busbars, the drawing system and drawing method of this application for diamond wire busbars can also be used for drawing other types of metal wires suitable as diamond wire busbars, especially for drawing metal wires with high rigidity, poor plasticity and high strength, such as for drawing molybdenum wires.

[0150] As can be seen from the above description, the drawing system and drawing method for diamond wire busbars of the present application embodiments have at least one of the following advantages:

[0151] Since graphite emulsion is not used as a lubricant, drying is not required. Instead, lubricating fluid is used as the lubricant. With appropriate heating of the lubricating fluid and drawing die, high winding speed can be achieved while obtaining qualified diamond wire, resulting in higher production efficiency. For example, for finer tungsten wires below Φ0.035mm, the winding speed can reach about 600m / min or more.

[0152] Since electroplated brass is not used as a lubricant, the electroplating process, which involves significant investment, high operating costs, and stringent environmental requirements, is eliminated.

[0153] Using lubricating fluid as the lubricant for tungsten wire drawing is an environmentally friendly process because it avoids the dust pollution from graphite emulsions and the electroplating process.

[0154] The metal wire products meet the requirements for diamond wire busbars, with excellent coil diameter and higher strength.

[0155] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features, all of which should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A diamond wire drawing system (100), configured to convey a metal wire blank (200) and draw the metal wire blank (200) into a metal wire product (300) with a diameter smaller than the metal wire blank (200), characterized in that, include: The wire feeding device (10) is configured to output metal wire blanks (200). A take-up device (80) is configured to receive the metal wire product (300). A wire blank heating device (30) is disposed between the wire feeding device (10) and the wire taking device (80) and is configured to heat the metal wire blank (200). A coating device (411) is disposed between the wire blank heating device (30) and the take-up device (80), including a coating part mounting base (4111) and a coating part (4112) disposed on the coating part mounting base (4111), the coating part (4112) being configured to coat the metal wire blank (200) passing through the coating part (4112) with a lubricant; A drawing device (412), disposed between the coating device (411) and the take-up device (80), includes a die mounting base (4121) and a drawing die disposed on the die mounting base (4121), the drawing die being configured to draw the lubricated metal wire blank (200) through the drawing die and draw the metal wire blank (200) into the metal wire product (300); and The drawing zone heating device is configured to heat the lubricant output from the coating section (4112) and the drawing die.

2. The drawing system (100) for diamond wire busbars according to claim 1, characterized in that, The temperature of the heating zone of the wire rod heating device (30) is in the range of 200°C to 1200°C, preferably in the range of 400°C to 950°C; the length of the heating zone of the wire rod heating device (30) along the conveying direction of the metal wire rod (200) is in the range of 0.2m to 2m, preferably in the range of 0.4m to 1.2m; and / or The drawing zone heating device is configured to heat the lubricant to a temperature range of 50°C to 400°C, preferably to a temperature range of 70°C to 350°C; and / or The drawing zone heating device is configured to heat the drawing die to a temperature range of 200°C to 500°C, preferably to a temperature range of 250°C to 400°C.

3. The drawing system (100) for diamond wire busbars according to claim 1 or 2, characterized in that, The drawing zone heating device includes a lubricant heating section for heating the lubricant and a die heating section for heating the drawing die; and / or The heating device for the drawing zone includes a universal heating section that simultaneously heats the lubricant and the drawing die.

4. The drawing system (100) for diamond wire busbars according to any one of claims 1 to 3, characterized in that, The lubricant coating device (411) and the drawing device (412) are arranged adjacent to each other or integrated so that the metal wire blank (200) output from the coating part (4112) directly enters the drawing die.

5. The drawing system (100) for diamond wire busbars according to any one of claims 1 to 4, characterized in that, It also includes a recycling device (413) configured to receive redundant lubricant not coated on the metal wire blank (200) output by the lubricant coating device (411) and the stripped lubricant scraped off by the drawing die, and to transport the received redundant lubricant and stripped lubricant to the lubricant coating device (411) via a delivery pump.

6. The drawing system (100) for diamond wire busbars according to claim 5, characterized in that, The recycling device (413) includes a recycling bin (4131), wherein, The recycling bin (4131) is spaced apart from at least one of the coating section mounting base (4111) and the mold mounting base (4121); and / or The recycling bin (4131) is integrally disposed with at least one of the coating part mounting base (4111) and the mold mounting base (4121).

7. The drawing system (100) for diamond wire busbars according to claim 6, characterized in that, The coating part mounting base (4111), the recycling bin (4131), and the mold mounting base (4121) are integrally formed. The recycling bin (4131) is located between the coating part mounting base (4111) and the mold mounting base (4121) and below the coating part (4112) and the drawing die. The coating part mounting base (4111) and the mold mounting base (4121) constitute part of the box wall of the recycling bin (4131).

8. The drawing system (100) for diamond wire busbar according to claim 7, characterized in that, The drawing zone heating device includes a universal heating unit that simultaneously heats the lubricant and the drawing die, the universal heating unit being configured to heat the lubricant and the drawing die in the recovery tank (4131) by heating the die mounting base (4121).

9. The drawing system (100) for diamond wire busbars according to any one of claims 1 to 8, characterized in that, The coating section (4112) includes a liquid outlet, which includes a lubricant outlet (4113). The metal wire blank (200) is spaced apart from the lubricant outlet (4113) to allow the flow of the lubricant output through the lubricant outlet (4113).

10. The drawing system (100) for diamond wire busbar according to claim 9, characterized in that, The outlet nozzle includes a guide groove (4114) extending along the conveying direction of the metal wire blank (200), the lubricant outlet (4113) is recessed relative to the top surface of the guide groove (4114) and communicates with the guide groove (4114), and the metal wire blank (200) passes through the guide groove (4114).

11. The drawing system (100) for diamond wire busbars according to any one of claims 1 to 10, characterized in that, The distance between the heating end position of the wire rod heating device (30) and the coating start position of the coating part (4112) is 0.01m to 0.5m, preferably 0.015m to 0.1m.

12. The drawing system (100) for diamond wire busbars according to any one of claims 1 to 11, characterized in that, The maximum operating temperature of the lubricant is greater than or equal to 200°C, preferably greater than or equal to 300°C; and / or The lubricant is a polyalphaolefin, ester oil, silicone oil, or perfluoropolyether oil.

13. The drawing system (100) for diamond wire busbars according to any one of claims 1 to 12, characterized in that, The take-up device (80) is configured to receive the metal wire product (300) at a take-up speed ranging from 200 m / min to 1200 m / min, preferably from 360 m / min to 800 m / min.

14. The drawing system (100) for diamond wire busbars according to any one of claims 1 to 13, characterized in that, The drawing die is configured to receive and draw metal wire blanks (200) with a diameter of 0.03 mm to 0.39 mm, preferably 0.05 mm to 0.18 mm; and / or The drawing die is configured to output a wire product (300) with a diameter of 0.018 mm to 0.18 mm, preferably 0.024 mm to 0.1 mm.

15. The drawing system (100) for diamond wire busbar according to any one of claims 1 to 14, characterized in that, The heating zone of the wire rod heating device (30) includes multiple heating channels for the metal wire rod (200) to pass through; The coating apparatus (411) includes a plurality of coating sections (4112) that correspond one-to-one with the plurality of heating channels. The drawing device (412) includes a multi-stage drawing die that corresponds one-to-one with the plurality of heating channels; The drawing system (100) is configured to heat the metal wire blank (200) sequentially through the heating channel corresponding to the drawing die of each stage and coat it with the lubricant by the coating section (4112) before it enters the drawing die of each stage.

16. A method for drawing diamond wire busbars, characterized in that, Drawing a metal wire blank (200) into a metal wire product (300) with a diameter smaller than that of the metal wire blank (200) using the drawing system (100) for diamond wire busbars according to any one of claims 1 to 15, comprising: The metal wire blank (200) is heated by the wire blank heating device (30). The coating section (4112) coats the outer periphery of the metal wire blank (200) heated by the wire blank heating device (30) with a lubricant heated by the drawing zone heating device. The lubricated metal wire blank (200) is drawn through a drawing die heated by the drawing zone heating device to form the metal wire product (300).

17. A method for drawing diamond wire busbars, characterized in that, include: Heating the metal wire blank (200); Heating the lubricating fluid; Heated drawing die; The heated lubricant is applied to the outer periphery of the heated metal wire blank (200); The lubricated metal wire blank (200) is drawn through the heated drawing die to form a metal wire product (300) with a diameter smaller than that of the metal wire blank (200).

18. The method for drawing diamond wire busbars according to claim 17, characterized in that, The temperature of the heating zone for heating the metal wire blank (200) is in the range of 200°C to 1200°C, preferably in the range of 400°C to 950°C; the length of the heating zone along the conveying direction of the metal wire blank (200) is in the range of 0.2m to 2m, preferably in the range of 0.4m to 1.2m; and / or The temperature of the heated lubricant is in the range of 50°C to 400°C, preferably in the range of 70°C to 350°C; and / or The temperature of the heated drawing die is in the range of 200°C to 500°C, preferably in the range of 250°C to 400°C.

19. The method for drawing diamond wire busbars according to claim 17 or 18, characterized in that, Coating the outer periphery of the metal wire blank (200) with a heated lubricant involves a flow of the lubricant through which the metal wire blank (200) passes.

20. The method for drawing diamond wire busbars according to any one of claims 17 to 19, characterized in that, The maximum operating temperature of the lubricant is greater than or equal to 200°C, preferably greater than or equal to 300°C; and / or The lubricant is a polyalphaolefin, ester oil, silicone oil, or perfluoropolyether oil.

21. The method for drawing diamond wire busbars according to any one of claims 17 to 20, characterized in that, The take-up speed of the metal wire product (300) is 200 m / min to 1200 m / min, preferably 360 m / min to 800 m / min.

22. The method for drawing diamond wire busbars according to any one of claims 17 to 21, characterized in that, The diameter of the metal wire blank (200) is 0.03 mm to 0.39 mm, preferably 0.05 mm to 0.18 mm; and / or The diameter of the metal wire product (300) is 0.018 mm to 0.18 mm, preferably 0.024 mm to 0.1 mm.

23. The method for drawing diamond wire busbars according to any one of claims 17 to 22, characterized in that, The metal wire blank (200) is drawn into the metal wire product (300) through a multi-stage heated drawing die, wherein the metal wire blank (200) is heated and coated with heated lubricant on the outer periphery of the metal wire blank (200) before entering each stage of the drawing die.

24. The method for drawing diamond wire busbars according to any one of claims 17 to 23, characterized in that, The metal wire blank (200) is a black tungsten wire.

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