A manufacturing process for corrosion-resistant copper-nickel alloy wire

Abstract

The present invention provides a process for manufacturing corrosion-resistant copper-nickel alloy wire, which relates to the technical field of metal continuous casting. The process includes: S1: selecting raw materials based on the corrosion-resistant copper-nickel alloy wire and accurately weighing them to obtain a mixed raw material; S2: selecting a suitable mold and installing the selected mold in a vacuum continuous casting machine. After heating, melting, and casting, a copper-nickel alloy column is obtained. During the vacuum continuous casting process, a vacuum pump is activated to evacuate the copper-nickel alloy column; S3: placing the obtained copper-nickel alloy column in a wire drawing machine and performing multiple wire drawing operations to obtain copper-nickel alloy wire. During the wire drawing process, a hot drawing process is adopted, and an extended jet protection device is installed on both sides of the wire drawing die of the wire drawing machine; S4: selecting suitable dedicated winding equipment for winding. This invention greatly reduces the difficulty of drawing, avoids breakage of the copper-nickel alloy wire, and prevents the spillage of carcinogens, thereby ensuring the health and safety of workers in the production workshop and ensuring continuous and efficient production and processing of the equipment.

Description

Technical Field

[0001] The present application relates to the field of metal continuous casting, and in particular to a process for manufacturing corrosion-resistant copper-nickel alloy wire. Background Art

[0002] Copper-nickel alloy wire has good corrosion resistance. In order to meet the high-strength requirements of some aviation components, it is necessary to change the internal composition and final form of the copper-nickel alloy by adding some metal elements.

[0003] By adding Be elements, precipitation strengthening phases can be formed, which greatly improves strength and fatigue life. By adding Ti elements, Ti-Ni intermetallic compounds can be formed, which improve strength and heat resistance, inhibit impurities such as sulfur and oxygen, and improve high-temperature oxidation resistance.

[0004] However, the addition of Be increases the hardness, but the die wears severely during drawing, and surface cracks are prone to occur. Be and its oxides are Class I carcinogens, and the powder produced during the drawing process needs to be centrally processed to avoid overflow and impact on the health of workers. The addition of Ti increases the hardness of the alloy, and higher tension is required during drawing, which can easily cause wire breakage and lead to drawing failure. Summary of the Invention

[0005] In view of the above problems, an embodiment of the present application is proposed to provide a corrosion-resistant copper-nickel alloy wire manufacturing process.

[0006] In response to the above problems, the present invention provides a corrosion-resistant copper-nickel alloy wire manufacturing process, which greatly reduces the difficulty of drawing, avoids the breakage of the copper-nickel alloy wire, and at the same time avoids the spillage of carcinogens, thereby ensuring the health and safety of workers in the production workshop and ensuring continuous and efficient production and processing of the equipment.

[0007] In order to solve the above problems, the technical solution adopted by the present invention is:

[0008] A manufacturing process for corrosion-resistant copper-nickel alloy wire comprises the following steps: S1, selecting raw materials according to the corrosion-resistant copper-nickel alloy wire and accurately weighing them, mixing the weighed solid raw materials to obtain mixed raw materials; S2, selecting a suitable mold, and installing the selected mold in a vacuum continuous casting machine, obtaining a copper-nickel alloy column after heating, melting and casting, and starting a vacuum pump for vacuuming during the vacuum continuous casting process; S3, placing the obtained copper-nickel alloy column in a wire drawing machine and performing multiple wire drawing to obtain copper-nickel alloy wire, adopting a hot drawing process during the wire drawing process, using an extended jet protection device installed on both sides of the wire drawing die of the wire drawing machine, and continuously spraying protective gas toward the large end and the small end of the wire drawing die during the drawing process, controlling the copper-nickel alloy to achieve hot drawing in a protective atmosphere, and directionally cleaning and collecting the metal powder generated by the drawing; S4, after the copper-nickel alloy wire is drawn to a predetermined size, selecting suitable special winding equipment for winding.

[0009] Preferably, in step S2, a vacuum pump is started to evacuate the sample to a pressure of 10⁻² to 10⁻³ Pa. While evacuating the sample, the graphite crucible is heated, and the temperature is rapidly raised to 1380 to 1490°C by means of segmented heating. When the temperature reaches above 1400°C, a refining operation is performed, and the refining time is controlled within 5 to 7 minutes.

[0010] Preferably, in step S3, a corresponding drawing die is selected according to the shape requirements of the finished copper-nickel alloy wire, and the drawing speed is controlled at 1.0-1.3 mm / s; during the drawing process, the copper-nickel alloy column and the drawing die are lubricated, and the lubricant selected is a high-temperature resistant lubricant.

[0011] Preferably, in the hot drawing process of step S3, different heating methods are selected according to the size of the copper-nickel alloy wire. For thick wires with a diameter greater than 20 mm, radiation or gas heating is selected. For copper-nickel alloy wires with a diameter between 6 mm and 20 mm, high-frequency induction coils are selected for heating. For copper-nickel alloy wires with a diameter less than 6 mm, resistance heating is used.

[0012] Preferably, the extended jet protection equipment described in step S3 includes a protective sleeve 1 located on one side of the big head end of the drawing die, and a cleaning device is arranged inside the protective sleeve 1, and the cleaning device includes a relatively fixed positioning seat 1 and a relatively movable positioning seat 2, and the positioning seat 1 and the positioning seat 2 are both pipe fittings, and the positioning seat is arranged on the outside of the positioning seat 2, and the positioning seat 2 is rotatably connected to the inner wall of the positioning seat 1, and an inclined cleaning nozzle is opened inside the positioning seat 2. In the process of controlling the rotation of the positioning seat 2, the protective gas is controlled to be blown out from the cleaning nozzle and flow toward the big head end of the drawing die.

[0013] Preferably, an annular conducting chamber 1 is formed inside the positioning seat 1, an annular conducting chamber 2 is formed inside the positioning seat 2, the annular conducting chamber 1 and the annular conducting chamber 2 are connected, and the cleaning nozzle is connected to the annular conducting chamber 2.

[0014] Preferably, an exhaust nozzle is further provided at the lower end of the protective sleeve 1, and the exhaust nozzle is externally connected to a negative pressure device to control the rate of negative pressure exhaust at the exhaust nozzle to be lower than the rate of entry of the protective gas.

[0015] Preferably, a driving device and a connecting sleeve 2 are also provided in the protective sleeve 1 for driving the positioning seat 2 to rotate in a certain direction; the driving device includes a driving gear, a connecting sleeve 1 and an offset wheel, the offset wheel is rotatably connected to the inner wall of the protective sleeve 1, the driving gear is located on the outside and connected to the driving power source, the connecting sleeve 1 is located in the middle position and connected to the offset wheel and the driving gear to realize power transmission, and the connecting sleeve 2 is located on the other side and connected to the offset wheel and the positioning seat 2.

[0016] Preferably, the first end of the second connecting sleeve is fixedly connected to the second positioning seat, the second end of the second connecting sleeve is fixedly connected to the offset wheel, and the vertical cross-sectional dimension of the first end of the second connecting sleeve is smaller than the vertical cross-sectional dimension of the second end of the second connecting sleeve.

[0017] Preferably, an offset hole is opened inside the offset wheel, the offset hole is eccentrically arranged relative to the drawing hole in the center of the drawing die, and the offset hole can be directional and rotated around the axis of the drawing hole.

[0018] The beneficial effects of the present invention are:

[0019] Compared with the prior art, the present invention ensures the accuracy of the components and avoids the introduction of impurities to the greatest extent by accurately selecting raw materials and selecting vacuum treatment during vacuum continuous casting, thereby ensuring the quality of the finished copper-nickel alloy; at the same time, a hot drawing process is adopted to maintain the copper-nickel alloy wire at a suitable temperature during the drawing process, which greatly reduces the difficulty of drawing and avoids the breakage of the copper-nickel alloy wire. In addition, an extended jet protection device is installed on the outside of the drawing die, which can form a gas protection atmosphere on the outside of the copper-nickel alloy wire while continuously spraying protective gas toward the inside to continuously collect the metal powder generated by the drawing, ensuring the normal and stable drawing of the copper-nickel alloy wire, and the metal powder is generated and collected in a small range, avoiding the spillage of carcinogens, ensuring the health and safety of the staff in the production workshop, and ensuring the continuous and efficient production and processing of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is a process flow chart of the present invention.

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the extended jet protection device of the present invention.

[0023] Figure 3 For the present invention Figure 2 Schematic diagram of the main structure.

[0024] Figure 4 For the present invention Figure 3 AA section structural diagram.

[0025] Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure in the B direction.

[0026] Figure 6 For the present invention Figure 4 Schematic diagram of the C-section structure.

[0027] In the figure: 100, wire drawing die; 110, wire drawing hole; 200, protective sleeve 1; 210, air inlet nozzle 1; 220, exhaust nozzle; 300, protective sleeve 2; 310, air inlet nozzle 2; 400, copper-nickel alloy wire; 500, driving device; 510, driving gear; 520, connecting sleeve 1; 530, offset wheel; 531, offset hole; 600, cleaning device; 610, positioning seat 1; 611, annular conduction chamber 1; 620, positioning seat 2; 621, annular conduction chamber 2; 622, cleaning nozzle; 700, connecting sleeve 2. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] A higher-strength corrosion-resistant copper-nickel alloy wire comprises, by mass percentage, 78%-85% Cu, 9.0%-11.0% Ni, 4.5%-5.5% Mn, 0.35%-0.85% Ti, 1.1-1.8% Be, 0.2%-1.0% Fe, and unavoidable impurities.

[0030] By adding Be to copper-nickel alloys, precipitation strengthening phases (such as Cu-Be) can be formed, which greatly improves the strength (up to more than 1000 MPa) and fatigue life. However, the addition of Be increases the hardness, causes severe die wear during drawing, and surface cracks are prone to occur. Be and its oxides are first-class carcinogens. Powder generated during the drawing process needs to be centrally processed to avoid overflow and affect the health of workers. By adding Ti, Ti-Ni intermetallic compounds are formed, which improves strength and heat resistance, inhibits impurities such as sulfur and oxygen, and improves high-temperature oxidation resistance. However, Ti increases the hardness of the alloy, requires higher tension during drawing, is prone to wire breakage, and Ti segregation may lead to local brittleness.

[0031] In order to solve the above problems, refer to the attached Figure 1 -Attached Figure 3 The present invention provides a new corrosion-resistant copper-nickel alloy wire manufacturing process for producing the above-mentioned corrosion-resistant copper-nickel alloy wire with higher strength, which specifically comprises the following steps:

[0032] Step 1: Preparation of raw materials; select the above raw materials according to the raw material ratio of higher strength corrosion-resistant copper-nickel alloy wire and accurately weigh them, mix the weighed solid raw materials to obtain mixed raw materials; the purity of each raw material needs to be greater than 99.8%, and the weighing and mixing process needs to be carried out in a relatively closed environment. The mixing equipment and storage device should be deeply cleaned before processing to avoid the introduction of impurities to the greatest extent.

[0033] Step 2: Heating, casting and cooling; select a graphite crucible of appropriate size and quality to ensure that it can withstand high temperature and erosion by the alloy melt; preheat the graphite crucible before use to remove moisture and impurities in the crucible to increase the service life of the crucible and the quality of the alloy; use a vacuum continuous casting machine for heating and casting, and conduct a comprehensive inspection of the vacuum continuous casting machine before casting, including the sealing of the equipment, heating system, cooling system, etc.; ensure that the equipment is in good operating condition to avoid malfunctions during the casting process.

[0034] After the preparation work is completed, carefully place the mixed raw materials into the preheated graphite crucible to avoid spilling the raw materials; during the loading process, pay attention to controlling the bulk density of the raw materials to avoid local over-dense or over-sparse conditions.

[0035] During casting, a suitable mold is selected according to the required size and shape of the copper-nickel alloy column, and the selected mold is installed in the vacuum continuous casting machine. It is necessary to ensure that the mold is installed firmly and positioned accurately to ensure that the cast copper-nickel alloy column meets the requirements.

[0036] During the casting process, vacuum operation is required. Specifically, the vacuum pump is started to evacuate the vacuum to 10⁻²~10⁻³ Pa, so as to reduce the reaction of the copper-nickel alloy with oxygen, nitrogen and other gases in the air during the smelting process and avoid defects such as pores and inclusions.

[0037] While evacuating the crucible, the graphite crucible is heated. A segmented heating method is adopted, with preheating performed at a lower power level first, so that the copper-nickel alloy raw material in the graphite crucible is slowly heated to prevent the crucible from cracking or the raw material from splashing due to rapid temperature changes. When the temperature reaches a certain level, the heating power is gradually increased to rapidly raise the temperature to 1380-1490°C.

[0038] When the temperature reaches above 1400°C, refining operation is carried out; the refining time is controlled at 5 to 7 minutes. During the refining process, stirring, blowing (inert protective gas or reaction gas that reacts with impurities), etc. are used to promote the floating of impurities in the alloy melt, thereby improving the purity and quality of the alloy.

[0039] After refining is completed, heating is stopped and the alloy melt is cooled. An appropriate cooling rate is used to avoid defects such as cracks in the alloy column caused by excessive cooling. The cooling rate can be adjusted by controlling parameters such as the flow rate and temperature of the cooling medium.

[0040] Step 3: Alloy drawing; first debug the wire drawing machine. Before using the wire drawing machine to draw the copper-nickel alloy column, debug the wire drawing machine; adjust the die size, drawing speed, tension and other parameters of the wire drawing machine to ensure the smooth progress of the wire drawing process; control the drawing speed at 1.0~1.3mm / s, and make appropriate adjustments according to the actual situation of the alloy column.

[0041] During the wire drawing process, the copper-nickel alloy column and the wire drawing die are lubricated; appropriate lubricants, such as lubricating oil and grease, are selected to reduce friction during the wire drawing process, improve the wire drawing efficiency and the surface quality of the copper-nickel alloy wire. During the wire drawing process, the alloy wire needs to be monitored, and the operating status of the wire drawing machine and the quality of the copper-nickel alloy wire need to be monitored in real time; the changes in parameters such as the diameter and surface roughness of the copper-nickel alloy wire are observed, and the parameters of the wire drawing machine are adjusted in time to ensure the stability of the quality of the copper-nickel alloy wire; multiple wire drawing operations are performed according to the final diameter of the copper-nickel alloy wire required; the copper-nickel alloy wire is heated or kept warm before each wire drawing to maintain the copper-nickel alloy wire within a certain temperature range for hot drawing. After each wire drawing, the copper-nickel alloy wire is subjected to intermediate annealing to eliminate the internal stress generated during the wire drawing process and improve the plasticity and toughness of the copper-nickel alloy wire.

[0042] Hot drawing (heating to 300~500℃) can reduce deformation resistance, difficulty and resistance of new copper-nickel alloy wires with added Be and Ti, and avoid defects inside the copper-nickel alloy wire that may cause breakage during the drawing process, especially in the later stages of drawing. At the same time, the use of diamond-coated dies can better withstand the temperature during the hot drawing process, extend the service life of the dies, improve the drawing effect, and optimize the lubricant (such as graphite-based high-temperature lubricant). The selection of high-temperature resistant lubricants can better target the new hot drawing process, continuously provide good lubrication effects, and improve the quality of the finished copper-nickel alloy wire.

[0043] Moreover, during the hot drawing process, the outside of the copper-nickel alloy wire is subjected to the rigid extrusion of the die, which can optimize and adjust the component positions and mixed distribution patterns inside the copper-nickel alloy wire, and control the internal components of the copper-nickel alloy wire to be more evenly distributed within a small range. During multiple drawing processes, each drawing can make subtle adjustments to the internal components of the copper-nickel alloy wire, which can greatly improve the problem of local uneven distribution of internal components during the smelting and casting process, thereby optimizing the product quality of the final copper-nickel alloy wire and allowing the final copper-nickel alloy wire to obtain better strength, heat resistance and corrosion resistance.

[0044] The size of the copper-nickel alloy wire continues to decrease during the drawing process. During the drawing process, different heating methods are used to maintain the copper-nickel alloy wire within the appropriate temperature range for hot drawing according to the different sizes of the copper-nickel alloy wire, so as to ensure the stability of the overall temperature of the copper-nickel alloy wire during the drawing process.

[0045] During the initial drawing process, radiation or gas heating is used to maintain the temperature of the copper-nickel alloy column to prevent the copper-nickel alloy column from being too low in temperature and affecting normal drawing. Radiation or gas heating is suitable for thick wires with a diameter greater than 20 mm. The temperature control accuracy is low, but it is suitable for the drawing preparation of large quantities of thick wires and for heating preparation of the entire wire material. At the same time, radiation or gas heating requires processing of the processing environment and needs to be carried out in a relatively isolated environment to avoid oxidation of the copper-nickel alloy column with oxygen in the air during the heating process, avoid the formation of oxidized impurities on the surface, and ensure the quality of the final drawn product.

[0046] In the middle stage of drawing, a high-frequency induction coil is used for heating. The high-frequency induction coil is placed on the outside of the wire, and the eddy current effect is used to accelerate the heating of the wire to maintain the wire within the above-mentioned predetermined temperature for hot drawing operation to ensure the normal progress of drawing. Drawing heating in the above manner has the characteristics of fast temperature response speed, low energy consumption and good control effect. It is suitable for wires of medium thickness and copper-nickel alloy wires with a diameter of 6mm to 20mm. Oxidation also needs to be avoided during high-frequency coil induction heating. A matching extended jet protection device is required to spray protective gas to avoid oxidation. At the same time, the metal powder generated at the big head end during the drawing process can be cleaned to avoid scratches and damage to the surface of the copper-nickel alloy wire caused by metal powder particles. At the same time, the generated metal powder can be collected in a centralized manner to avoid the overflow of metal powder with Be element causing physical damage to the staff, thereby ensuring the normal processing in the processing workshop.

[0047] In the later stage of drawing, resistance heating is used for precise temperature control, which is suitable for smaller filaments, that is, copper-nickel alloy wires with a size of less than 6mm. The resistance heating method has the advantages of uniform heating and precise temperature control, which is suitable for copper-nickel alloy wires to be used for wire drawing and casting. A resistance heating device is installed in the wire drawing machine. The resistance wire is electrically heated before drawing, and the temperature of the heating equipment is maintained by resistance heating. There are multiple groups of resistance wire heating devices, which are distributed according to the final drawn size of the copper-nickel alloy wire. The heating power and temperature are determined according to the size of the copper-nickel alloy wire to avoid overheating damage caused by excessively high temperature, and to avoid excessive drawing resistance caused by excessively low temperature, which causes damage to the surface of the finished copper-nickel alloy wire.

[0048] A large amount of powder will also be generated in the later stage of drawing. An extended jet protection device also needs to be installed on the outside of the drawing die. The extended jet protection device is installed on the big head end of the drawing die. During the drawing process, the protective gas is continuously sprayed toward the big head end and the small head end of the drawing die to achieve directional cleaning and collection of the drawing powder; at the same time, the above-mentioned resistance wire heating device can also be installed in the extended jet protection device, and the ejected gas can be used to protect the copper-nickel alloy wire heated by the resistance wire to avoid oxidation during the heating process, and the directionally flowing protective gas contains a certain amount of heat, which can heat and clean the surface of the unheated copper-nickel alloy wire that enters later, so as to increase the surface temperature of the copper-nickel alloy wire, achieve preheating, and achieve efficient utilization of resources. The high-speed airflow can clean some impurities on the surface of the copper-nickel alloy wire to avoid residual powder particles from affecting the subsequent drawing processing of the copper-nickel alloy wire.

[0049] The present application document also provides an extended jet protection device, which is installed on both sides of the wire drawing die 100, including a protective sleeve 200 located on the large end side of the wire drawing die 100 and a protective sleeve 2 300 located on the small end side of the wire drawing die 100. An unwinding wheel and a rewinding wheel are respectively installed on both sides of the wire drawing die 100. The linear rotation rate of the rewinding wheel is controlled to be greater than the linear rotation rate of the unwinding wheel to achieve the drawing of the copper-nickel alloy wire 400. The copper-nickel alloy wire 400 passes through the protective sleeve 200 and the wire drawing die 100 in turn and finally passes through the protective sleeve 2 300.

[0050] The heating equipment is installed in the protective sleeve 200 to maintain the protective sleeve 200 at a predetermined heating temperature, thereby heating the copper-nickel alloy wire 400 and facilitating the drawing of the copper-nickel alloy wire 400 at the drawing die 100. An air inlet nozzle 210 is provided at the upper end of the protective sleeve 200, and an air inlet nozzle 2 310 is provided at the upper end of the protective sleeve 2 300. The protective gas enters the corresponding protective sleeve 200 and the protective sleeve 2 300 through the air inlet nozzle 210 and the air inlet nozzle 2 310 respectively to maintain the interior in a protective atmosphere, thereby avoiding oxidation of the copper-nickel alloy wire 400 during the heating process and ensuring the quality of the finished copper-nickel alloy wire 400.

[0051] A cleaning device 600 is provided in the protective sleeve 200. The cleaning device 600 can continuously blow gas toward the big head end of the wire drawing die 100, which can dissipate heat from the big head end of the wire drawing die 100 and clean the metal powder generated by the big head end of the wire drawing die 100 with gas, thereby avoiding continuous accumulation of metal powder at the big head end of the wire drawing die 100, ensuring the smoothness of the copper-nickel alloy wire 400 during the wire drawing process, ensuring the smoothness of the surface of the copper-nickel alloy wire 400, reducing the resistance during the wire drawing process, and ensuring the normal progress of the wire drawing.

[0052] The cleaning device 600 here includes a relatively fixed positioning seat 1 610 and a relatively movable positioning seat 2 620. The positioning seat 1 610 and the positioning seat 2 620 are both pipe fittings. The positioning seat 1 610 is sleeved on the outside of the positioning seat 2 620. The positioning seat 2 620 is rotatably connected to the inner wall of the positioning seat 1 610. An annular conductive chamber 1 611 is formed inside the positioning seat 1 610. An annular conductive chamber 2 621 is formed inside the positioning seat 2 620. There is a gap between the annular conductive chamber 1 611 and the annular conductive chamber 2 621. In the connected state, the annular conducting chamber 1 611 and the air inlet nozzle 1 210 are in a connected state, so that the protective gas is pumped in. At the same time, an inclined cleaning nozzle 622 is opened inside the positioning seat 2 620, and the cleaning nozzle 622 is connected to the annular conducting chamber 2 621. In the process of controlling the rotation of the positioning seat 2 620, the protective gas is blown out from the cleaning nozzle 622, and the gas blown out from the cleaning nozzle 622 flows toward the big head end of the drawing die 100, thereby realizing continuous cleaning of the metal powder generated at the big head end of the drawing die 100.

[0053] At the same time, by controlling the continuous rotation of the positioning seat 2 620, the cleaning nozzle 622 can be concentrated on one point to perform annular cleaning on the drawing hole 110 between the copper-nickel alloy wire 400 and the drawing die 100 during the rotation process. During the continuous rotation of the positioning seat 2 620, the circumferential cleaning of the drawing hole 110 is achieved, thereby avoiding the residue of metal powder debris to the greatest extent.

[0054] The length of positioning seat 2 620 is greater than that of positioning seat 1 610, and both sides of positioning seat 2 620 partially extend beyond positioning seat 1 610, forming an annular step structure between positioning seat 1 610 and positioning seat 2 620, which can prevent metal powder from entering the rotating connection between positioning seat 1 610 and positioning seat 2 620, thereby ensuring the normal and smooth rotation of positioning seat 2 620.

[0055] The heating device here can be specifically installed in the positioning seat 610 or outside the positioning seat 610. The heating device is arranged in a ring shape to achieve efficient ring heating of the inner copper-nickel alloy wire 400.

[0056] Furthermore, as a structure for driving the positioning seat 2 620 to rotate, a driving device 500 and a connecting sleeve 2 700 are also provided in the protective sleeve 1 200. The driving device 500 includes a driving gear 510, a connecting sleeve 1 520 and an offset wheel 530. The offset wheel 530 is rotatably connected to the inner wall of the protective sleeve 1 200. The driving gear 510 is located on the outside and connected to the driving power source. The connecting sleeve 1 520 is located in the middle position and connected to the offset wheel 530 and the driving gear 510 to realize power transmission. The connecting sleeve 2 700 is located on the other side and connected to the offset wheel 530 and the positioning seat 2 620, and finally drives the positioning seat 2 620 to transmit. The driving device 500 and the connecting sleeve 2 700 here are both hollow pipes, which can allow the copper-nickel alloy wire 400 to pass through for directional movement.

[0057] The connecting sleeve 2 700 here is in the shape of a hollow truncated cone. The first end of the connecting sleeve 2 700 is fixedly connected to the positioning seat 2 620, and the second end of the connecting sleeve 2 700 is fixedly connected to the offset wheel 530. The vertical cross-sectional dimension of the first end of the connecting sleeve 2 700 is smaller than the vertical cross-sectional dimension of the second end of the connecting sleeve 2 700. Through the above-mentioned structural design, a narrow and long channel can be formed on the inner side of the connecting sleeve 2 700, which can prevent copper powder from entering the interior of the connecting sleeve 2 700 and affecting the normal transmission of the copper-nickel alloy wire 400. At the same time, a larger accommodating area can be formed on the outer side of the connecting sleeve 2 700, especially on the side close to the wire drawing die 100, which can collect the metal powder blown off by the gas cleaning.

[0058] In order to reduce the replacement frequency of the overall structure, an exhaust nozzle 220 is further opened at the lower end of the protective sleeve 200. The exhaust nozzle 220 is externally connected to a negative pressure device, which can quickly and centrally discharge the metal powder cleaned by air blowing at the drawing hole 110. During the drawing process, a directional airflow is synchronously formed inside the protective sleeve 200 to achieve continuous discharge of metal powder, thereby avoiding the continuous accumulation of metal powder affecting the rotation of related structures and avoiding the frequent disassembly and replacement of related structures due to excessive accumulation of metal powder. This greatly improves the service life of related components and the production efficiency of copper-nickel alloy wire 400.

[0059] It should be noted that it is necessary to control the rate of negative pressure exhaust at the exhaust nozzle 220 to be lower than the rate of entry of the protective gas, so as to control the remaining difference of the protective gas to flow toward the outside along the length direction of the protective sleeve 200, discharge the air in the protective sleeve 200, and control the interior of the protective sleeve 200 to be in the atmosphere of protective gas, thereby further avoiding oxidation of the copper-nickel alloy wire 400 during processing and improving the quality of the finished product.

[0060] Furthermore, an offset hole 531 is opened inside the offset wheel 530, and the offset hole 531 is eccentrically arranged relative to the drawing hole 110 in the center of the drawing die 100. The offset hole 531 can rotate in a directional manner around the axis of the drawing hole 110. Through the above-mentioned structural design, during the rotation of the offset wheel 530, the copper-nickel alloy wire 400 can be tangentially pulled and guided through the offset hole 531, and the moving position of the copper-nickel alloy wire 400 can be slightly changed at a farther position to realize deflection drive control. Without affecting the normal wire drawing production of the copper-nickel alloy wire 400, the gap between the copper-nickel alloy wire 400 and the inner wall of the drawing hole 110 can be periodically enlarged, so that the protective gas can enter the gap to clean the generated metal powder, thereby further avoiding the residue of metal powder generated by wire drawing.

[0061] The angle between the copper-nickel alloy wire 400 and the axis of the drawing hole 110 after it is deflected at the offset hole 531 should be less than 2° to avoid the copper-nickel alloy wire 400 having a large deflection angle that affects the normal drawing of the copper-nickel alloy wire 400 and reduces the wear of the copper-nickel alloy wire 400. At the same time, it also avoids the gap between the copper-nickel alloy wire 400 and the drawing hole 110 being too small to enhance the cleaning effect of the metal powder.

[0062] The inner diameter of the offset hole 531 is larger than the outer diameter of the copper-nickel alloy wire 400, and the inner wall of the offset hole 531 is made of a smooth coating, which minimizes the friction generated during the bending and pulling process and ensures the normal subsequent wire drawing of the copper-nickel alloy wire 400.

[0063] It should also be noted that the offset hole 531 and the cleaning nozzle 622 are respectively located on both sides of the axis of the drawing hole 110. While the offset hole 531 pulls the copper-nickel alloy wire 400 upward, the cleaning nozzle 622 can be located at a lower position to blow gas toward the larger gap at the drawing hole 110. The two are in a relatively fixed state. During the rotation of the offset wheel 530 and the positioning seat 620, the positions of the two change synchronously, realizing synchronous control of adaptive gas deep cleaning.

[0064] During the assembly process, first fix the positioning seat 1 610 to the predetermined position, and control the annular conduction chamber 1 611 to be opposite to the air inlet nozzle 1 210; then push the pre-fixed driving device 500, positioning seat 2 620 and connecting sleeve 2 700 in from the other side, control the positioning seat 2 620 to be opposite to the positioning seat 1 610, and control the annular conduction chamber 1 611 to be relatively consistent with the annular conduction chamber 2 621 to achieve a relative rotational sealing connection. The matching accuracy requirements between the positioning seat 1 610 and the positioning seat 2 620 are relatively low, and the pressure in the annular conduction chamber 2 621 can be maintained to increase. Finally, a certain pressure of protective gas is sprayed from the cleaning nozzle 622 to clean the metal powder generated at the drawing hole 110.

[0065] Step 4: Winding of raw materials; after the copper-nickel alloy wire is drawn to the predetermined size, select appropriate special winding equipment to ensure that it can meet the winding requirements of the copper-nickel alloy wire; the winding speed of the winding equipment should be kept stable to ensure that the copper-nickel alloy wire is evenly wound on the outer surface of the equipment; during the winding process, control the tension of the special winding equipment to avoid excessive tension causing the copper-nickel alloy wire to break, or too little tension causing the copper-nickel alloy wire to be loosely wound; the tension can be controlled by adjusting the motor speed and brake device of the winding equipment; finished product inspection and packaging: after winding is completed, the copper-nickel alloy wire coil is inspected to check whether its appearance quality, dimensional accuracy, etc. meet the requirements; qualified copper-nickel alloy wire coils are packaged with appropriate packaging materials, such as plastic film, cartons, etc. to prevent damage during transportation and storage, and copper-nickel alloy wires with abnormal appearance and winding are picked out for individual inspection and testing to ensure the quality of the packaged finished products.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A process for manufacturing corrosion-resistant copper-nickel alloy wire, characterized in that: The steps include: S1. Select raw materials according to the corrosion-resistant copper-nickel alloy wire, accurately weigh them, and mix the weighed solid raw materials to obtain a mixed raw material; S2. Select a suitable mold and install the selected mold in a vacuum continuous casting machine. After heating, melting and casting, a copper-nickel alloy column is obtained. During the vacuum continuous casting process, a vacuum pump is started to evacuate the vacuum; S3. The obtained copper-nickel alloy column is placed in a wire drawing machine and subjected to multiple wire drawing to obtain a copper-nickel alloy wire. A hot drawing process is adopted during the wire drawing process. An extended jet protection device is installed on both sides of the wire drawing die (100) of the wire drawing machine. During the drawing process, a protective gas is continuously sprayed toward the large end and the small end of the wire drawing die (100). The copper-nickel alloy is controlled to be hot drawn in a protective atmosphere, and the metal powder generated by the drawing is directionally cleaned and collected. S4. After the copper-nickel alloy wire is drawn to a predetermined size, a suitable winding device is selected for winding; The extended jet protection device described in step S3 includes a protective sleeve 1 (200) located on one side of the large head end of the wire drawing die (100), and a cleaning device (600) is provided in the protective sleeve 1 (200). The cleaning device (600) includes a relatively fixed positioning seat 1 (610) and a relatively movable positioning seat 2 (620). The positioning seat 1 (610) and the positioning seat 2 (620) are both pipe fittings. The positioning seat 1 (610) is sleeved on the outer side of the positioning seat 2 (620), and the positioning seat 2 (620) is rotatably connected to the inner wall of the positioning seat 1 (610). An inclined cleaning nozzle (622) is provided inside the positioning seat 2 (620). During the process of controlling the rotation of the positioning seat 2 (620), the protective gas is controlled to be blown out from the cleaning nozzle (622) and flow toward the large head end of the wire drawing die (100); An annular conductive chamber 1 (611) is formed inside the positioning seat 1 (610), and an annular conductive chamber 2 (621) is formed inside the positioning seat 2 (620). The annular conductive chamber 1 (611) and the annular conductive chamber 2 (621) are connected, and the cleaning nozzle (622) is connected to the annular conductive chamber 2 (621); The protective sleeve 1 (200) is further provided with a driving device (500) and a connecting sleeve 2 (700) for driving the positioning seat 2 (620) to rotate in a directional manner; the driving device (500) includes a driving gear (510), a connecting sleeve 1 (520) and an offset wheel (530); the offset wheel (530) is rotatably connected to the inner wall of the protective sleeve 1 (200); the driving gear (510) is located on the outside and connected to the driving power source; the connecting sleeve 1 (520) is located in the middle and connected to the offset wheel (530) and the driving gear (510) to achieve power transmission; the connecting sleeve 2 (700) is located on the other side and connected to the offset wheel (530) and the positioning seat 2 (620); The first end of the second connecting sleeve (700) is fixedly connected to the second positioning seat (620), the second end of the second connecting sleeve (700) is fixedly connected to the offset wheel (530), and the vertical cross-sectional dimension of the first end of the second connecting sleeve (700) is smaller than the vertical cross-sectional dimension of the second end of the second connecting sleeve (700); An offset hole (531) is provided inside the offset wheel (530), and the offset hole (531) is eccentrically arranged relative to the drawing hole (110) at the center of the drawing die (100). The offset hole (531) can be directional and rotated around the axis of the drawing hole (110).

2. A process for manufacturing corrosion-resistant copper-nickel alloy wire according to claim 1, characterized in that: In step S2, a vacuum pump is started to evacuate the sample to a temperature of 10⁻² to 10⁻³ Pa. While evacuating the sample, the graphite crucible is heated, and the temperature is rapidly raised to 1380 to 1490°C by staged heating. When the temperature reaches above 1400°C, a refining operation is performed, and the refining time is controlled within 5 to 7 minutes.

3. The process for manufacturing corrosion-resistant copper-nickel alloy wire according to claim 1, characterized in that: In step S3, a corresponding drawing die (100) is selected according to the shape requirements of the finished copper-nickel alloy wire, and the drawing speed is controlled at 1.0-1.3 mm / s; during the drawing process, the copper-nickel alloy column and the drawing die are lubricated, and the lubricant selected is a high-temperature resistant lubricant.

4. The process for manufacturing corrosion-resistant copper-nickel alloy wire according to claim 1, characterized in that: In step S3, different heating methods are selected according to the size of the copper-nickel alloy wire in the hot drawing process. For thick wires with a diameter greater than 20 mm, radiation or gas heating is selected. For copper-nickel alloy wires with a diameter between 6 mm and 20 mm, high-frequency induction coils are selected for heating. For copper-nickel alloy wires with a diameter less than 6 mm, resistance heating is used.

5. The process for manufacturing corrosion-resistant copper-nickel alloy wire according to claim 1, characterized in that: The lower end of the protective sleeve (200) is also provided with an exhaust nozzle (220), and the exhaust nozzle (220) is externally connected to a negative pressure device to control the rate of negative pressure exhaust at the exhaust nozzle (220) to be lower than the rate of protective gas entering.

Images