A multi-mode wire drawing annealing system and process

Abstract

A multi-mode wire drawing annealing system includes a wire-paying device, a guide wheel group for adjusting the position of tungsten wire, a coating structure for coating graphite emulsion on the surface of tungsten wire, a furnace tube heating device, a tower wheel winding device, and a wire-taking device; the tungsten wire is released from the wire-paying device, passes through the guide wheel, the coating device, and the wire drawing die in sequence, and enters the tower wheel winding device after completing one wire drawing, and enters the next wire drawing after being adjusted by the tower wheel winding device, and after several wire drawing times, the tungsten wire enters the annealing furnace tube through the guide wheel, and after annealing, it is adjusted by the tower wheel winding device for the final wire drawing, and after the final wire drawing is completed, the tungsten wire enters the wire-taking device. The present invention integrates the wire drawing and annealing processes into a continuous production process, reduces the intermediate links, and improves the product quality and consistency.

Description

Technical Field

[0001] The invention belongs to the field of diamond wire manufacturing, and in particular relates to a multi-mode wire drawing annealing system and process. Background Art

[0002] Diamond wire is a cutting tool made by coating or embedding diamond powder and binder on metal wire. It is widely used in the cutting of hard and brittle materials such as photovoltaics, sapphire, and magnetic materials due to its excellent wear resistance and cutting efficiency. At present, most high-quality diamond wires use tungsten wire as the mother wire because tungsten wire has high strength, high hardness and good thermal stability, which can meet the stringent requirements of diamond wire on the substrate.

[0003] The manufacturing of diamond wire is a complex process that involves several critical steps to ensure the performance of the final product. Drawing and annealing are two essential steps in this process. The drawing process involves gradually drawing a thicker tungsten wire to the required diameter through a series of dies. This process not only determines the physical dimensions of the final diamond wire, but also has a direct impact on the mechanical properties of the wire. After the drawing process, the surface finish and internal crystal structure of the tungsten wire will change, affecting the overall quality of the diamond wire. The annealing process aims to improve the microstructure of the tungsten wire by heating and then cooling it, eliminating the internal stress caused by drawing, adjusting the hardness and ductility, and improving the flexibility and fatigue resistance of the wire. This step is crucial to ensure the stability and durability of the diamond wire in subsequent use.

[0004] In the traditional diamond wire manufacturing method, drawing and annealing are usually divided into two independent process flows. Such a separate design leads to a decrease in overall production efficiency. Each conversion process requires additional time to prepare and adjust the equipment, which increases unnecessary waiting time. Since two independent production lines for drawing and annealing need to be established separately, this not only occupies a large space, but also means higher capital expenditure and operating costs. In addition, the two different systems also increase the complexity and difficulty of maintenance work. It is difficult to achieve full automation control in the existing process, and it is impossible to fully utilize the advantages of modern information technology for refined management and optimized scheduling. The large proportion of manual operation makes the entire production process susceptible to human factors, such as changes in the skill level of operators, which poses a challenge to the consistency and reliability of product quality. Due to the above reasons, especially when there is a lot of manual intervention, there may be significant differences in product quality between different batches and within the same batch. This inconsistency not only affects customer satisfaction, but also is not conducive to the company's establishment of a stable market image. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-mode wire drawing annealing system and process, which can reduce the equipment footprint and cost in the diamond wire manufacturing process, while improving production efficiency, ensuring the consistency of product quality, and reducing the impact of human factors on product quality.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of a multi-mode wire drawing annealing system and process of the present invention is as follows:

[0007] A multi-mode wire drawing annealing system includes a wire unwinding device, a guide wheel group for adjusting the position of the tungsten wire, a coating structure for coating the surface of the tungsten wire with graphite emulsion, a furnace tube heating device, a tower wheel winding device, and a wire taking-up device;

[0008] The guide wheel group includes a plurality of guide wheels, the coating structure includes a plurality of coating devices, the furnace tube heating device is provided with an annealing furnace tube and a plurality of wire drawing dies, and the wire drawing dies are provided correspondingly to the coating devices;

[0009] The tungsten wire is released from the wire-releasing device and passes through the guide wheel, the coating device, and the wire drawing die in sequence to complete one wire drawing, and then enters the tower wheel winding device. After being adjusted by the tower wheel winding device, it enters the next wire drawing. After several wire drawing times, the tungsten wire enters the annealing furnace tube through the guide wheel. After annealing, it is adjusted by the tower wheel winding device for the final wire drawing. After the final wire drawing is completed, the tungsten wire enters the wire taking-up device.

[0010] As a further improvement of the present invention, the guide wheel group includes an annealing guide wheel arranged corresponding to the annealing furnace tube and a wire drawing guide wheel arranged corresponding to the wire drawing die.

[0011] As a further improvement of the present invention, the number of the wire drawing guide wheels, the coating device and the wire drawing die corresponds to N, the guide wheel group includes the first wire drawing guide wheel to the N-th wire drawing guide wheel, the coating structure includes the first coating device to the N-th coating device, and the furnace tube heating device is provided with the first wire drawing die to the N-th wire drawing die; the tungsten wire passes through the first wire drawing guide wheel, the first coating device and the first wire drawing die in sequence to complete the first wire drawing... until the tungsten wire passes through the N-th wire drawing guide wheel, the N-th coating device and the N-th wire drawing die in sequence to complete the final wire drawing.

[0012] As a further improvement of the present invention, after the N-1th wire drawing, the tungsten wire passes through the tower wheel winding device and then enters the annealing furnace tube through the annealing guide wheel. After annealing, it enters the Nth wire drawing through the tower wheel winding device. After the Nth wire drawing is completed, the tungsten wire enters the wire taking-up device.

[0013] As a further improvement of the present invention, the annealing furnace tube provides a heat source by mixing compressed air and natural gas and then burning them.

[0014] As a further improvement of the present invention, the wire-releasing device further comprises a counter-tension clamp for controlling the tension of the tungsten wire during the first wire drawing process.

[0015] A multi-mode wire drawing annealing process comprises the following steps:

[0016] S1, after the tungsten wire is released from the wire-paying device, it enters the first wire drawing guide wheel for position adjustment. After the adjustment, it enters the first coating device to coat the surface of the tungsten wire with graphite emulsion. After the coating is completed, the tungsten wire enters the furnace tube heating device for heating, and then passes through the first wire drawing die in the furnace tube heating device to complete the first wire drawing;

[0017] S2, the tungsten wire that has completed the first wire drawing is guided by the tower wheel winding device into the second wire drawing guide wheel for the second wire drawing, until the N-1th wire drawing is completed;

[0018] S3, the tungsten wire that has completed the N-1th drawing is guided into the annealing guide wheel through the tower wheel winding device, and enters the annealing furnace tube for annealing after the annealing guide wheel is adjusted in position;

[0019] S4. After annealing, the tungsten wire is guided into the Nth wire drawing guide wheel through the tower wheel winding device for final wire drawing. After the final wire drawing is completed, the tungsten wire enters the wire taking-up device.

[0020] As a further improvement of the present invention, the tungsten wire speed is 15m / min-20m / min, the wire drawing temperature is 1000℃-1200℃, the annealing temperature is 1400℃-1600℃, and the specific gravity of the graphite emulsion used in the coating device is 1.04g / cm 3 ~1.07g / cm 3 , the particle size range is 3.0um~15um.

[0021] As a further improvement of the present invention, the initial wire diameter of the tungsten wire is 0.77 mm, the wire diameter of the tungsten wire after the N-1th wire drawing is 0.43 mm, and the tungsten wire with a wire diameter of 0.39 mm is obtained after annealing and the Nth wire drawing.

[0022] As a further improvement of the present invention, the process of the present invention includes 6 wire drawing, the tungsten wire in S3 is annealed after the fifth wire drawing is completed, and the wire is wound after the sixth wire drawing after the annealing is completed in S4.

[0023] Beneficial effects:

[0024] By integrating the drawing and annealing processes into one continuous system, the changeover time between processes is reduced and the overall production speed is increased. The system can complete multiple wire drawing and final annealing in one process, making the entire process from tungsten wire pay-off to wire take-up more compact and efficient.

[0025] Since all operations are completed in one set of equipment, there is no need to set up separate production lines for wire drawing and annealing, which greatly saves factory space. This is especially important for companies with limited land resources or those who want to optimize their layout.

[0026] Not only does the initial investment cost decrease due to the reduction in the number of production equipment, but the daily operation and maintenance costs are also reduced due to the high degree of automation of the system. In addition, the simplified process can also reduce the waste of raw materials and further save costs.

[0027] The design of this system takes into account the pursuit of automation in modern industry. It can be easily connected to information management systems such as MES (Manufacturing Execution System) to realize data monitoring and analysis of the entire process from raw material input to finished product output, ensuring the transparency and controllability of production.

[0028] Reducing the impact of human factors through automation technology can effectively improve product consistency and stability. This is especially critical for products such as diamond wires that have extremely high quality requirements.

[0029] Compared with traditional labor-intensive production processes, this system reduces the chances of workers directly coming into contact with high-temperature, high-speed rotating parts, reduces safety risks, and also improves working conditions in the workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a multi-mode wire drawing annealing system of the present invention;

[0031] Explanation of the marks in the figure: 10, wire-paying device; 20, guide wheel group; 21, wire drawing guide wheel; 21, annealing guide wheel; 30, coating structure; 31, coating device; 40, furnace tube heating device; 41, wire drawing die; 42, annealing furnace tube; 50, tower wheel winding device; 60, wire taking-up device; 70, tungsten wire. DETAILED DESCRIPTION

[0032] In order to better understand the purpose, structure and function of the present invention, a multi-mode wire drawing annealing system and process of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0033] Implementation example:

[0034] like Figure 1As shown, a multi-mode wire drawing annealing system is provided with a guide wheel group 20, a coating structure 30, a furnace tube heating device 40, and a tower wheel winding device 50 in sequence between a wire pay-off device 10 and a wire take-up device 60. In this embodiment, the production of a tungsten wire 70 with a specification of 0.77mm-0.39mm is taken as an example. The tungsten wire of 0.77mm is released from the wire pay-off device 10, passes through the guide wheel, passes through the coating device 31 and the wire drawing die 41 in sequence, and then enters the tower wheel winding device 50 to complete the first wire drawing. After 5 wire drawing, it enters the annealing furnace tube 42 through the guide wheel to complete annealing, and then performs the final wire drawing. After obtaining the tungsten wire 70 of 0.39mm, it enters the wire take-up device 60.

[0035] The guide wheel group 20 includes a plurality of guide wheels, which guide and locate the travel path of the tungsten wire. Through the setting of the plurality of guide wheels, it can be ensured that the wire moves in the correct direction and position during the drawing and annealing process, and the deviation and vibration are reduced. The guide wheels are divided into a wire drawing guide wheel 21 and an annealing guide wheel 22. The tungsten wire passing through the wire drawing guide wheel 21 enters the coating device 31, and the tungsten wire 70 passing through the annealing guide wheel 22 enters the annealing furnace tube 42. The annealing guide wheel 22 is arranged between the last wire drawing guide wheel 21 and the penultimate wire drawing guide wheel 21, so that the tungsten wire completes the final wire drawing after annealing to obtain the finished tungsten wire.

[0036] The tungsten wire 70 passing through the guide wheel enters the coating structure 30, which includes a plurality of coating devices 31. The coating devices 31 coat the surface of the tungsten wire 70 with graphite emulsion to lubricate the surface of the tungsten wire. The tungsten wire 70 generates high friction with the wire drawing die 41 during the drawing preparation process, which is prone to wire breakage and damage to the die. Coating with graphite emulsion can effectively reduce the friction between the metal and the die, make the metal deform evenly, and extend the life of the die. The number of coating devices 31 is consistent with the wire drawing guide wheel 21, and is set corresponding to the wire drawing guide wheel 21.

[0037] A wire drawing die 41 and an annealing furnace tube 42 are provided in the furnace tube heating device 40 to provide the necessary high temperature environment for the drawing annealing process. The wire drawing die 41 is made of a polycrystalline die, and the die frame temperature is 300°C. After the tungsten wire 70 passes through the coating device 31 and is fully heated in the furnace tube heating device 40, it enters the wire drawing die 41 to complete the wire drawing. During the drawing process, the tungsten wire needs to be heated at high temperature to improve its crystal structure and performance, eliminate stress, adjust hardness and ductility, and thus improve the quality and stability of the product. By heating the furnace tube, the organizational structure and mechanical properties of the drawn product can be changed. The efficient heat conduction performance of the furnace tube heating device 40 can achieve fast and uniform heating, thereby improving production efficiency. The annealing furnace tube 42 is installed with high-pressure compressed air, mixed with natural gas in a certain proportion, and fully burned to provide a heat source, which can accurately measure and control the temperature in the furnace to ensure uniform temperature distribution to achieve the required annealing temperature.

[0038] In this embodiment, six sets of corresponding wire drawing guide wheels 21, coating devices 31 and wire drawing dies, as well as a set of annealing guide wheels 22 and annealing furnace tubes 42 are provided to achieve six wire drawing and one annealing, and the annealing process is provided between the fifth wire drawing and the sixth wire drawing. The tungsten wire 70 passes through the first wire drawing guide wheel, the first coating device, and the first wire drawing die to complete the first wire drawing, and the sixth wire drawing is the final wire drawing. By annealing before the final wire drawing, the internal stress generated by the tungsten wire during the drawing process can be effectively reduced. This helps to stabilize the size, reduce deformation, improve softness, and facilitate subsequent processing.

[0039] A multi-mode wire drawing annealing process, a tungsten wire with a wire diameter of 0.77mm is released from a wire-paying device at a line speed of 15m / min and enters a first wire drawing guide wheel for position adjustment. After the adjustment is completed, it enters a first coating device to coat the surface of the tungsten wire with graphite emulsion, the graphite emulsion type is -25 / -26 flake graphite, its specific gravity range is 1.04, and its particle size range is 5um. After coating, the tungsten wire enters the furnace tube heating device to be heated to 1000°C, and then passes through the first wire drawing die in the furnace tube heating device to complete the first wire drawing; the tungsten wire that has completed the first wire drawing is guided into the second wire drawing guide wheel through the tower wheel winding device for the second wire drawing, until the fifth wire drawing is completed and the tungsten wire diameter is 0.43mm; then the tungsten wire is guided into the annealing guide wheel through the tower wheel winding device, and after the annealing guide wheel is adjusted in position, it enters the annealing furnace tube for annealing at 1400°C; after annealing, the tungsten wire is guided into the sixth wire drawing guide wheel through the tower wheel winding device for the final wire drawing. After the final wire drawing is completed, the tungsten wire with a wire diameter of 0.39mm enters the wire taking-up device.

[0040] The system and process of the present invention integrate the wire drawing and annealing processes into a continuous production process, reducing intermediate links, saving time and increasing output. The wire drawing-annealing continuous production method has obvious technical and economic effects, fast production speed and high efficiency. Quick mold change reduces the turnover of wire reels, reduces material consumption and saves factory space. Compared with traditional processes, it reduces the generation of waste products such as pull marks and oxidation color on the surface of wires caused by incomplete pickling and water washing of wire billets, and rough surfaces caused by over-pickling of wire billets, thereby improving the yield rate. The system design supports automated production, reduces the impact of human factors on the production process, and improves product consistency and reliability.

[0041] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A multi-mode wire drawing annealing system, characterized in that: It includes a wire-releasing device, a guide wheel group for adjusting the position of the tungsten wire, a coating structure for coating the surface of the tungsten wire with graphite emulsion, a furnace tube heating device, a tower wheel winding device, and a wire-receiving device; The guide wheel group includes a plurality of guide wheels, the coating structure includes a plurality of coating devices, the furnace tube heating device is provided with an annealing furnace tube and a plurality of wire drawing dies, and the wire drawing dies are provided correspondingly to the coating devices; The tungsten wire is released from the wire-releasing device and passes through the guide wheel, the coating device, and the wire drawing die in sequence to complete one wire drawing, and then enters the tower wheel winding device. After being adjusted by the tower wheel winding device, it enters the next wire drawing. After several wire drawing times, the tungsten wire enters the annealing furnace tube through the guide wheel. After annealing, it is adjusted by the tower wheel winding device for the final wire drawing. After the final wire drawing is completed, the tungsten wire enters the wire taking-up device.

2. The multi-mode wire drawing annealing system according to claim 1, characterized in that: The guide wheel group includes an annealing guide wheel arranged corresponding to the annealing furnace tube and a wire drawing guide wheel arranged corresponding to the wire drawing die.

3. The multi-mode wire drawing annealing system according to claim 2, characterized in that: The number of the wire drawing guide wheels, the coating devices, and the wire drawing dies is N, the guide wheel group includes the first wire drawing guide wheel to the Nth wire drawing guide wheel, the coating structure includes the first coating device to the Nth coating device, and the furnace tube heating device is provided with the first wire drawing die to the Nth wire drawing die; The tungsten wire passes through the first wire drawing guide wheel, the first coating device, and the first wire drawing die in sequence to complete the first wire drawing... until the tungsten wire passes through the Nth wire drawing guide wheel, the Nth coating device, and the Nth wire drawing die in sequence to complete the final wire drawing.

4. The multi-mode wire drawing annealing system according to claim 3, characterized in that: After the N-1th wire drawing, the tungsten wire passes through the tower wheel winding device and then enters the annealing furnace tube through the annealing guide wheel. After annealing, it passes through the tower wheel winding device and enters the Nth wire drawing. After the Nth wire drawing is completed, the tungsten wire enters the wire taking-up device.

5. The multi-mode wire drawing annealing system according to claim 1, characterized in that: The annealing furnace tube provides a heat source by mixing compressed air and natural gas and then burning them.

6. The multi-mode wire drawing annealing system according to claim 1, characterized in that: The wire-releasing device also includes a counter-tension clamp for controlling the tension of the tungsten wire during the first wire drawing process.

7. A multi-mode wire drawing annealing process, characterized in that: The following steps are involved: S1, after the tungsten wire is released from the wire-paying device, it enters the first wire drawing guide wheel for position adjustment. After the adjustment, it enters the first coating device to coat the surface of the tungsten wire with graphite emulsion. After the coating is completed, the tungsten wire enters the furnace tube heating device for heating, and then passes through the first wire drawing die in the furnace tube heating device to complete the first wire drawing; S2, the tungsten wire that has completed the first wire drawing is guided by the tower wheel winding device into the second wire drawing guide wheel for the second wire drawing, until the N-1th wire drawing is completed; S3, the tungsten wire that has completed the N-1th drawing is guided into the annealing guide wheel through the tower wheel winding device, and enters the annealing furnace tube for annealing after the annealing guide wheel is adjusted in position; S4. After annealing, the tungsten wire is guided into the Nth wire drawing guide wheel through the tower wheel winding device for final wire drawing. After the final wire drawing is completed, the tungsten wire enters the wire taking-up device.

8. The multi-mode wire drawing annealing process according to claim 7, characterized in that: The wire speed of the tungsten wire is 15m / min~20m / min, the wire drawing temperature is 1000℃~1200℃, the annealing temperature is 1400℃~1600℃, and the specific gravity of the graphite emulsion used in the coating device is 1.04g / cm 3 ~1.07g / cm 3 , the particle size range is 3.0um~15um.

9. The multi-mode wire drawing annealing process according to claim 7, characterized in that: The initial wire diameter of the tungsten wire is 0.77 mm. After the N-1th wire drawing, the wire diameter of the tungsten wire is 0.43 mm. After annealing and the Nth wire drawing, a tungsten wire with a wire diameter of 0.39 mm is obtained.

10. The multi-mode wire drawing annealing process according to claim 7, characterized in that: Including 6 wire drawing, the tungsten wire in S3 is annealed after the fifth wire drawing, and the tungsten wire in S4 is wound after the sixth wire drawing after annealing.

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