Heat treatment process for multi-axis finished rough copper wire

Abstract

The embodiment of the invention provides a multi-axis finished product thick copper wire heat treatment process, and relates to the technical field of bonding wire heat treatment. A multi-shaft finished product thick copper wire heat treatment process comprises the following steps that multi-shaft paying-off is conducted, specifically, a pretreated multi-shaft thick copper wire is placed on a chain type conveying belt and conveyed into a heating mechanism through the chain type conveying belt; heating: heating the multi-axis thick copper wire by using a heating mechanism in an electric induction heating manner, so that the heating time and temperature of the multi-axis thick copper wire in the heating mechanism are completely consistent; constant temperature: the heated multi-axis thick copper wire enters a constant temperature device, the constant temperature is the same as the heating temperature, and the constant temperature time is 1-4 hours; cooling: the multi-axis thick copper wire after constant temperature enters a cooling mechanism to be cooled, and the temperature in the cooling mechanism is reduced to room temperature through cooling water; according to the heat treatment process for the multi-axis finished rough copper wire, the treatment efficiency is remarkably improved, the energy consumption is reduced, and the product performance consistency is good.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bonding wire heat treatment, and particularly relates to a multi-shaft finished rough copper wire heat treatment process. BACKGROUND

[0002] In the processing of rough copper wire, annealing is a key process, which aims to eliminate the internal stress of the wire and improve the mechanical properties. At present, rough copper wire annealing usually adopts single-shaft annealing equipment for heat treatment.

[0003] The ordinary annealing equipment consumes a long time for rough wire heat treatment. When operating, the annealing equipment can only heat treat single-shaft copper wire at a time, and the processing efficiency is low. When the enterprise needs to heat treat a large amount of rough copper wire, the ordinary annealing equipment often needs to work continuously for a long time, which not only increases the production cost but also may cause production delay. In addition, the uniformity of heat distribution in the annealing process of the ordinary annealing equipment is difficult to guarantee, which may easily lead to inconsistent annealing effect of the copper wire and affect the product quality. SUMMARY

[0004] The present application aims to at least solve one of the technical problems of low processing efficiency, high energy consumption and poor performance consistency in the prior art. To this end, the present application provides a multi-shaft finished rough copper wire heat treatment process.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the present application is as follows: a multi-shaft finished rough copper wire heat treatment process, comprising the following steps:

[0006] S1, multi-shaft wire laying: placing the pretreated multi-shaft rough copper wire on a chain conveyor belt and conveying it to a heating mechanism by using the chain conveyor belt;

[0007] S2, heating: heating the multi-shaft rough copper wire by using the heating mechanism, and the heating mode adopts electric induction heating, so that the heating time and temperature of the multi-shaft rough copper wire in the heating mechanism are completely consistent;

[0008] S3, constant temperature: the heated multi-shaft rough copper wire enters a constant temperature device, the constant temperature is the same as the heating temperature, and the constant temperature time is 1-4 hours;

[0009] S4, cooling: the constant temperature multi-shaft rough copper wire enters a cooling mechanism for cooling, and the temperature in the cooling mechanism is cooled to room temperature by cooling water;

[0010] S5, multi-shaft wire winding: the cooled multi-shaft rough copper wire is directly taken out from the cooling mechanism.

[0011] As a further supplement to the present scheme, the number of multi-shaft rough copper wires in S1 is 3-8 shafts.

[0012] As a further supplement to the present solution, the heating temperature in S2 is set to 200-400℃ according to the material and performance requirements of the copper wire, and the heating time is set to 10-30 minutes.

[0013] As a further supplement to the present solution, in S3, inert gas is introduced into the constant temperature section for protection to prevent the copper wire surface from being oxidized.

[0014] As a further supplement to the present solution, in S2, a plurality of liftable electromagnetic coils are respectively sleeved on the multi-axis copper wire, and synchronous heating is performed.

[0015] Among them, the plurality of electromagnetic coil housings are provided with heat preservation covers to prevent heat diffusion.

[0016] As a further supplement to the present solution, in S4, the cooling mechanism is cooled by a cooling water spraying-evaporation-circulation mode, wherein the cooling water spraying, evaporation and the multi-axis copper wire in the cooling mechanism are separated, and heat exchange is completed by the cooling plate.

[0017] As a further supplement to the present solution, the heating mechanism, the constant temperature device and the cooling mechanism are connected in series, and the heating mechanism, the constant temperature device and the cooling mechanism are all provided with horizontal through import and export, and a temperature insulation section with import and export is further provided between the cooling mechanism and the constant temperature device.

[0018] As a further supplement to the present solution, the heating mechanism includes a heating body provided with import and export, an electric push rod fixed on the heating body, a mounting plate fixed to the lower end of the piston rod of the electric push rod, an insulating terminal fixedly installed on the mounting plate, a heat preservation cover fixed to the lower end of the insulating terminal, and an electromagnetic coil fixed in the heat preservation cover. The two ends of the electromagnetic coil are electrically connected to the insulating terminal through wires, and the insulating terminal is electrically connected to the external power supply through a flexible cable.

[0019] After the chain conveyor belt transports the multi-axis copper wire into the heating body, the electric push rod is started, so that the electric push rod drives the mounting plate to descend, thereby driving the plurality of heat preservation covers and electromagnetic coils to descend synchronously, so as to be respectively sleeved on the outside of the multi-axis copper wire. The electromagnetic coil is energized to heat the copper wire. The plurality of electromagnetic coils can synchronously heat the multi-axis copper wire, and the temperature is uniformly controlled, so as to achieve the purpose of uniform heating of the multi-axis copper wire during heating.

[0020] At the same time, the setting of the heat preservation cover makes the heat overflow less, can save energy consumption, improve the heating efficiency, and achieve the purpose of energy saving and efficiency increasing.

[0021] As a further supplement to the present solution, the cooling mechanism includes a cooling box provided with import and export, a water spraying main pipe connected with the output end of the conveying pump, a steam exhaust main pipe connected with the input end of the suction pump, and a cooling plate fixed to the top wall in the cooling box.

[0022] The bottom of the water spraying main pipe is fixed and communicated with the spray head penetrating through the cooling box and the top of the cooling plate, the bottom of the steam exhaust main pipe is fixed and communicated with the air suction cover penetrating through the cooling box and the top of the cooling plate, the cooling plate forms a cavity, and a plurality of evenly arranged fins are integrally formed on the outer side of the cooling plate.

[0023] As a further supplement to the present scheme, the top of the cooling plate is provided with mounting holes for the spray head and the air suction cover to penetrate through;

[0024] The cavity of the cooling plate is fixed with an exchange net plate, the exchange net plate is a horizontally extending net plate, a plurality of vertical through holes penetrating through the exchange net plate are formed in the exchange net plate, and the top of the exchange net plate is located below the spray head and the air suction cover and is spaced apart from both.

[0025] The heat in the cooling box is absorbed by the fins, then conducted to the exchange net plate through the cooling plate, the spray head sprays cooling water and uniformly distributes it on the exchange net plate, the cooling water absorbs the heat on the exchange net plate and quickly evaporates, the water vapor carrying heat is sucked out by the air suction cover, cooled by the external cooling device and then sprayed out by the spray head, forming a cooling mode of cooling water spraying-evaporation-circulation, which can realize the cooling operation in the cooling box;

[0026] Meanwhile, due to the arrangement of the exchange net plate, the distributed cooling water can quickly flow downward through the inclined surface and the through holes of the exchange net plate, thereby quickly and uniformly dispersing on the entire exchange net plate, realizing quick heat exchange and absorption, thereby improving the cooling efficiency and achieving good cooling effect.

[0027] The multi-shaft finished rough copper wire heat treatment process has the following advantages:

[0028] 1. The multi-shaft finished rough copper wire heat treatment process has the following advantages:

[0029] 2. The multi-shaft finished rough copper wire heat treatment process has the following advantages:

[0030] 3. The multi-shaft finished rough copper wire heat treatment process has the following advantages: BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. Other related drawings can also be obtained by those skilled in the art without creative effort.

[0032] Figure 1 is a whole flow chart of the present application;

[0033] Figure 2 is a detailed flow chart of the present application;

[0034] Figure 3 is a schematic diagram of the heating mechanism, constant temperature device, cooling mechanism and temperature insulation section in series of the present application;

[0035] Figure 4 is a sectional view of the heating mechanism of the present application;

[0036] Figure 5 is a sectional view of the heat preservation cover of the present application;

[0037] Figure 6 is a sectional view of the cooling mechanism of the present application;

[0038] Figure 7 is a sectional view of the cooling plate of the present application;

[0039] Figure 8 is a schematic diagram of the half sectional structure of the cooling plate of the present application.

[0040] Marked in the figure: 1, heating mechanism; 11, heating body; 12, electric push rod; 13, mounting plate; 131, heat insulation terminal; 14, heat preservation cover; 15, electromagnetic coil; 2, constant temperature device; 3, cooling mechanism; 31, cooling box; 32, water spraying main pipe; 321, spray head; 33, steam discharging main pipe; 331, air suction cover; 34, cooling plate; 341, fin; 342, mounting hole; 35, exchange net plate; 351, through hole; 4, temperature insulation section; 5, inlet and outlet. DETAILED DESCRIPTION

[0041] The present application will be specifically introduced below in combination with the drawings and specific embodiments.

[0042] As shown in the drawings, Figure 1 - Figure 2 A multi-axis finished rough copper wire heat treatment process of the present application includes the following steps:

[0043] S1, multi-shaft wire drawing: the pretreated multi-shaft copper wire is placed on a chain conveyor, the number of multi-shaft copper wire is 3-8 shafts (rolls), and the chain conveyor is used to convey the multi-shaft copper wire to the heating mechanism 1;

[0044] S2, heating: the multi-shaft copper wire is heated by the heating mechanism 1, the heating mode is inductive heating, the heating temperature is set to 200-400℃ according to the material and performance requirements of the copper wire, and the heating time is set to 10-30 minutes, so that the heating time and temperature of the multi-shaft copper wire in the heating mechanism 1 are completely consistent. Specifically, a plurality of liftable electromagnetic coils 15 are respectively sleeved on the multi-shaft copper wire and are synchronously heated; wherein the plurality of electromagnetic coils 15 are provided with a heat preservation cover 14 to prevent heat diffusion;

[0045] S3, constant temperature: the heated multi-shaft copper wire enters the constant temperature device 2, the constant temperature is the same as the heating temperature, inert gas (such as nitrogen or nitrogen-hydrogen mixed gas) is introduced into the constant temperature section for protection, to prevent the copper wire surface from being oxidized, and the constant temperature time is 1-4 hours;

[0046] S4, cooling: the constant temperature multi-shaft copper wire enters the cooling mechanism 3 for cooling, the temperature in the cooling mechanism 3 is cooled to room temperature by cooling water, specifically, the cooling mechanism 3 is cooled by the cooling water spray-evaporation-circulation method, wherein the cooling water spray, evaporation and the multi-shaft copper wire in the cooling mechanism 3 are separated, and heat exchange is completed by the cooling plate 34;

[0047] S5, multi-shaft wire winding: the cooled multi-shaft copper wire is directly taken out from the cooling mechanism 3.

[0048] The processing efficiency of the above process is significantly improved, the synchronous processing of 3-8 shafts is adopted, compared with the single shaft processing process, the processing efficiency is increased by 3-8 times, which can meet the demand of mass production; at the same time, the energy consumption is reduced, the idle time and heat loss of the equipment are reduced by multi-shaft synchronous processing, and the energy consumption per unit product is reduced by 20%-30%; and since the processing conditions of each shaft copper wire are consistent, the hardness fluctuation range of the treated copper wire is controlled within 1%, the conductivity fluctuation range is controlled within 0.5%, the product performance consistency is good, and it is much better than the existing single shaft processing process;

[0049] In addition, the operation is simplified, the multi-shaft synchronous feeding and discharging reduces the operation times and reduces the labor cost; the surface quality of the treated copper wire is excellent, the inert gas protection in the constant temperature device 2 effectively reduces the oxidation of the copper wire surface, and improves the appearance quality and use performance of the product.

[0050] Further, the heating mechanism 1, the constant temperature device 2 and the cooling mechanism 3 are connected in series, the heating mechanism 1, the constant temperature device 2 and the cooling mechanism 3 are all provided with the transversely penetrating import and export 5, and the cooling mechanism 3 and the constant temperature device 2 are further provided with the temperature insulation section 4 with the import and export 5, the heat transfer between the cooling mechanism 3 and the constant temperature device 2 is reduced by the temperature insulation section 4, the energy consumption is reduced, and the mutual influence of the two is avoided.

[0051] Further, the heating mechanism 1 comprises the heating body 11 provided with the import and export 5, the electric push rod 12 fixed on the heating body 11, the mounting plate 13 fixed with the lower end of the piston rod of the electric push rod 12, the heat insulation terminal 131 fixed on the mounting plate 13, the heat preservation cover 14 fixed with the lower end of the heat insulation terminal 131 and the electromagnetic coil 15 fixed in the heat preservation cover 14, the two ends of the electromagnetic coil 15 are electrically connected with the heat insulation terminal 131 through wires, the heat insulation terminal 131 is electrically connected with the external power supply through a flexible cable, the heat preservation cover 14 is made of a material commonly used in the prior art and suitable for the embodiment, for example, ceramic fiber, aluminum silicate fiber, alumina ceramic fiber composite material and the like, and has good heat insulation performance.

[0052] Through the arrangement of the electric push rod 12, the mounting plate 13 and the plurality of heat preservation covers 14 and electromagnetic coils 15, after the multi-shaft rough copper wire is conveyed into the heating body 11 by the chain conveyor belt, the electric push rod 12 is started to drive the mounting plate 13 to descend, thereby driving the plurality of heat preservation covers 14 and electromagnetic coils 15 to synchronously descend, so as to be respectively covered outside the multi-shaft rough copper wire, the electromagnetic coil 15 is powered on to heat the rough copper wire, the plurality of electromagnetic coils 15 can synchronously heat the multi-shaft rough copper wire, and the temperature is uniformly controlled, so as to achieve the purpose of uniformly heating the multi-shaft rough copper wire during heating.

[0053] Meanwhile, the arrangement of the heat preservation cover 14 can reduce heat overflow, save energy consumption, improve heating efficiency and achieve the purpose of energy saving and efficiency increasing.

[0054] Further, the cooling mechanism 3 comprises the cooling box 31 provided with the import and export 5, the water spraying main pipe 32 connected with the output end of the conveying pump, the steam discharging main pipe 33 connected with the input end of the suction pump, the cooling plate 34 fixed on the top wall in the cooling box 31, the conveying pump and the suction pump (not shown in the figure) are all prior art, and the specific model can be selected by the person skilled in the art according to the use requirement, and the specific structure and working principle are well known to the person skilled in the art, which will not be described here.

[0055] The bottom of the water spraying pipe 32 is fixed and communicated with the spray head 321 penetrating through the cooling box 31 and the top of the cooling plate 34, and the bottom of the steam exhaust pipe 33 is fixed and communicated with the air suction cover 331 penetrating through the cooling box 31 and the top of the cooling plate 34. The cooling plate 34 forms a cavity, and the outer side of the cooling plate 34 is integrally formed with a plurality of evenly arranged fins 341.

[0056] The top of the cooling plate 34 is provided with a mounting hole 342 for the spray head 321 and the air suction cover 331 to penetrate;

[0057] The cooling plate 34 is fixed with an exchange net plate 35 in the cavity, and the exchange net plate 35 is a horizontally extending net plate. A plurality of through holes 351 vertically penetrating the exchange net plate 35 are formed in the exchange net plate 35. The top of the exchange net plate 35 is located below the spray head 321 and the air suction cover 331 and is spaced apart from both.

[0058] Through the arrangement of the spray head 321, the air suction cover 331, the cooling plate 34 and the exchange net plate 35, the heat in the cooling box 31 is absorbed by the fins 341, then conducted to the exchange net plate 35 through the cooling plate 34, the cooling water is sprayed out of the spray head 321 and evenly distributed on the exchange net plate 35, the cooling water absorbs the heat on the exchange net plate 35 and quickly evaporates, the water vapor carrying heat is sucked out by the air suction cover 331, cooled by an external cooling device and then sprayed out by the spray head 321 again, forming a cooling mode of cooling water spraying-evaporating-circulating, which can realize the cooling operation in the cooling box 31.

[0059] At the same time, due to the arrangement of the exchange net plate 35, the sprayed cooling water (not evaporated) can quickly flow downward through the inclined surface of the exchange net plate 35 and the through holes 351, so as to be quickly and evenly distributed on the entire exchange net plate 35, realizing quick heat exchange and absorption, thereby improving the cooling efficiency and achieving good cooling effect.

[0060] It should be further explained that the spray head 321, the air suction cover 331, the cooling plate 34 and the exchange net plate 35 can be provided with multiple groups and evenly distributed in the cooling box 31 (for example, arranged around the side of the cooling box 31 or arrayed), so as to further improve the cooling efficiency and ensure the uniformity of cooling, thereby improving the consistency of the finished product performance of the rough copper wire after heat treatment.

[0061] A multi-shaft finished rough copper wire heat treatment process working principle: the pretreated multi-shaft rough copper wire is placed on the chain conveyor, the number of multi-shaft rough copper wire is 3-8 shafts, and the chain conveyor is used to convey to the heating mechanism 1; the multi-shaft rough copper wire is heated by the heating mechanism 1, the heating mode adopts electric induction heating, the heating temperature is set to 200-400 DEG C according to the material and performance requirements of the rough copper wire, and the heating time is set to 10-30 minutes, so that the heating time and temperature of the multi-shaft rough copper wire in the heating mechanism 1 are completely consistent, specifically, a plurality of liftable electromagnetic coils 15 are respectively sleeved on the multi-shaft rough copper wire, and synchronous heating is carried out; wherein, the plurality of electromagnetic coils 15 are provided with heat preservation covers 14 for preventing heat diffusion;

[0062] The heated multi-shaft rough copper wire enters the constant temperature device 2, the constant temperature temperature is the same as the heating temperature, inert gas is introduced into the constant temperature section for protection, so as to prevent the copper wire surface from being oxidized, and the constant temperature time is 1-4 hours; the multi-shaft rough copper wire after constant temperature enters the cooling mechanism 3 for cooling, the temperature in the cooling mechanism 3 is cooled to room temperature by cooling water, specifically, the cooling mechanism 3 is cooled by the cooling water spraying-evaporation-circulation mode, wherein, the cooling water spraying, evaporation and the multi-shaft rough copper wire in the cooling mechanism 3 are separated, and heat exchange is completed by the cooling plate 34; the multi-shaft rough copper wire after cooling is directly taken out from the cooling mechanism 3.

[0063] Finally, it should be pointed out that the chain conveyor, the electric push rod, the electromagnetic coil, the heat insulation terminal, the heat preservation cover and the temperature insulation section need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0064] The specific structure and principle of the chain conveyor, the electric push rod, the electromagnetic coil, the heat insulation terminal, the heat preservation cover and the temperature insulation section are clear to those skilled in the art, and will not be described in detail here.

[0065] It can be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. A heat treatment process for multi-axis finished thick copper wire, characterized in that: The following steps are involved: S1. Multi-axis wire unwinding: placing the pre-treated multi-axis thick copper wire on a chain conveyor and transporting it to a heating mechanism (1) using the chain conveyor; S2. Heating: The multi-axis thick copper wire is heated by the heating mechanism (1), and the heating method adopts electric induction heating, so that the heating time and temperature of the multi-axis thick copper wire in the heating mechanism (1) are completely consistent; S3, constant temperature: the heated multi-axis thick copper wire enters the constant temperature device (2), the constant temperature is the same as the heating temperature, and the constant temperature time is 1 to 4 hours; S4, cooling: the multi-axis thick copper wire after constant temperature enters the cooling mechanism (3) for cooling, and the temperature in the cooling mechanism (3) is cooled to room temperature by cooling water; S5. Multi-axis wire taking-up: The cooled multi-axis thick copper wire is directly taken out from the cooling mechanism (3).

2. The heat treatment process for multi-axis finished thick copper wire according to claim 1, characterized in that: The number of multi-axis thick copper wires in S1 is 3-8 axes.

3. The heat treatment process for multi-axis finished thick copper wire according to claim 2, characterized in that: The heating temperature in S2 is set to 200-400° C. according to the material and performance requirements of the thick copper wire, and the heating time is set to 10-30 minutes.

4. The heat treatment process for multi-axis finished thick copper wire according to claim 3, characterized in that: In S3, an inert gas is introduced into the constant temperature section for protection to prevent oxidation of the copper wire surface.

5. The heat treatment process for multi-axis finished thick copper wire according to claim 4, characterized in that: In said S2, a plurality of electromagnetic coils (15) that can be raised and lowered are respectively sleeved on the multi-axis thick copper wires and are heated synchronously; The outer covers of the plurality of electromagnetic coils (15) are provided with heat-insulating covers (14) for preventing heat diffusion.

6. The heat treatment process for multi-axis finished thick copper wire according to claim 5, characterized in that: In the above S4, the cooling water spray-evaporation-circulation method is used to cool the cooling mechanism (3), wherein the cooling water spray-evaporation is separated from the multi-axis thick copper wire in the cooling mechanism (3), and heat exchange is completed through the cooling plate (34).

7. The heat treatment process for multi-axis finished thick copper wire according to claim 1, characterized in that: The heating mechanism (1), the constant temperature device (2), and the cooling mechanism (3) are arranged in series. The heating mechanism (1), the constant temperature device (2), and the cooling mechanism (3) are all provided with an inlet and outlet (5) extending transversely therethrough. A temperature insulating section (4) with an inlet and outlet (5) is also provided between the cooling mechanism (3) and the constant temperature device (2).

8. The heat treatment process for multi-axis finished thick copper wire according to claim 7, characterized in that: The heating mechanism (1) comprises a heating body (11) with an inlet and outlet (5), an electric push rod (12) fixed on the heating body (11), a mounting plate (13) fixed to the lower end of the piston rod of the electric push rod (12), a heat-insulating terminal (131) fixedly mounted on the mounting plate (13), a heat-insulating cover (14) fixed to the lower end of the heat-insulating terminal (131), and an electromagnetic coil (15) fixed in the heat-insulating cover (14), wherein both ends of the electromagnetic coil (15) are electrically connected to the heat-insulating terminal (131) via a wire, and the heat-insulating terminal (131) is electrically connected to an external power supply via a flexible cable.

9. The heat treatment process for multi-axis finished thick copper wire according to claim 8, characterized in that: The cooling mechanism (3) comprises a cooling box (31) with an inlet and outlet (5), a water spray main pipe (32) connected to the output end of the delivery pump, a steam exhaust main pipe (33) connected to the input end of the suction pump, and a cooling plate (34) fixed to the top wall of the cooling box (31); The bottom of the water spray main pipe (32) is fixed and connected to a nozzle (321) that passes through the cooling box (31) and the top of the cooling plate (34); the bottom of the steam exhaust main pipe (33) is fixed and connected to an air suction hood (331) that passes through the cooling box (31) and the top of the cooling plate (34); a cavity is formed in the cooling plate (34); and a plurality of evenly arranged fins (341) are integrally formed on the outer side of the cooling plate (34).

10. The heat treatment process for multi-axis finished thick copper wire according to claim 9, characterized in that: The top of the cooling plate (34) is provided with a mounting hole (342) for the nozzle (321) and the air suction cover (331) to pass through; An exchange mesh plate (35) is fixed in the cavity of the cooling plate (34). The exchange mesh plate (35) is a horizontally extending mesh plate. A plurality of through holes (351) vertically penetrating the exchange mesh plate (35) are provided on the exchange mesh plate (35). The top of the exchange mesh plate (35) is located below the nozzle (321) and the suction hood (331) and is spaced apart from both.

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