Preheating device for tungsten filament wire-drawing die

Abstract

The preheating device for the tungsten filament wire-drawing die comprises a hollow preheating support and a conveying pipeline for conveying natural gas for preheating the die, a preheating end used for preheating a mold is formed at the upper end of the preheating support, a plurality of heat supply holes communicated with the hollow interior of the preheating support are formed in the preheating end, a supporting inner pipe is arranged in the preheating support, the hollow interior of the supporting inner pipe is communicated with a conveying pipeline, and a plurality of vent holes are formed in the supporting inner pipe. Natural gas enters the supporting inner pipe from the conveying pipeline and then is exhausted through the vent holes and the heat supply holes in sequence, and the mold is heated after the natural gas is ignited on the surface of the preheating end. According to the utility model, the preheating function of the die is independent, the energy consumption is lower, the production cost is saved, and the production safety is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of diamond wire manufacturing, and in particular relates to a preheating device for tungsten wire drawing dies. Background Technology

[0002] Diamond wire, typically referring to cutting wire with a layer of diamond particles electroplated onto high-strength steel or alloy wire, is widely used in the precision cutting of hard materials such as semiconductors, photovoltaics, and sapphire due to its extremely high hardness and wear resistance. Especially in the solar photovoltaic industry, diamond wire used for silicon wafer cutting has become one of the key technologies for industry development due to its high efficiency and high-quality cutting results.

[0003] In the manufacturing of diamond wire, wire drawing is a crucial step. By drawing a metal billet through a series of dies with progressively smaller diameters, a fine wire of the desired diameter is ultimately formed. To ensure proper lubrication during the wire drawing process, reduce frictional resistance, and improve product quality, the wire drawing dies need to be preheated before use. Proper preheating ensures good lubrication on the inner surface of the die, reduces energy consumption during wire drawing, and extends the die's lifespan.

[0004] Traditional mold preheating methods typically involve placing the wire drawing die directly onto the heating furnace used for diamond wire production. However, this preheating method has significant limitations and shortcomings:

[0005] Energy waste: The heating furnaces used to produce tungsten wire or other high-strength alloy wire are generally long and powerful, while the actual drawing dies used are relatively small. This results in a large amount of energy being wasted on heating the entire furnace body when preheating the dies, increasing unnecessary energy consumption and production costs.

[0006] Inconvenient operation: In the operating environment of a multi-pass wire drawing machine, workers need to thread the wire through each die sequentially. If a traditional heating furnace is used for preheating, workers must avoid other dies that are not yet threaded but are being preheated during the threading process, which undoubtedly increases the difficulty and complexity of the operation.

[0007] Safety hazards: The preheated molds are at a high temperature. During the threading process, these high-temperature molds are located within the workers' operating range, making them prone to accidental contact and burns, which poses a threat to the safety of the operators. Utility Model Content

[0008] The purpose of this utility model is to provide a preheating device for tungsten wire drawing dies, so as to solve the technical problems of energy waste, inconvenient operation and safety hazards in the preheating of drawing dies.

[0009] To achieve the above objectives, the specific technical solution of the preheating device for tungsten wire drawing dies according to this utility model is as follows:

[0010] A preheating device for a tungsten wire drawing die includes an internally hollow preheating support and a pipeline for supplying natural gas to preheat the die.

[0011] The upper end of the preheating support forms a preheating end for heating the mold. The preheating end is provided with a plurality of heating holes communicating with the hollow interior of the preheating support. The interior of the preheating support is provided with a support inner tube, the interior of which is hollow and communicates with the conveying pipeline. The support inner tube is provided with a plurality of vent holes. Natural gas enters the support inner tube from the conveying pipeline and exits through the vent holes and the heating holes in sequence. After being ignited on the surface of the preheating end, it heats the mold.

[0012] As a further improvement of this utility model, the preheating support is a hollow tubular structure closed at both ends, with an opening at the bottom for the conveying pipe to pass through.

[0013] As a further improvement of this utility model, the vent hole is located on the surface of the inner support tube away from the heating hole.

[0014] As a further improvement of this utility model, support portions are provided on both sides of the preheating end, and the support portions are arranged along the upper surface of the preheating support for placing the mold to be preheated.

[0015] As a further improvement of this utility model, the preheating end is recessed relative to the upper surface of the preheating support between the support portions on both sides, and baffles are provided at both ends of the preheating end.

[0016] As a further improvement of this utility model, the inner support tube is a hollow tubular structure with closed ends, which is disposed inside the hollow of the preheating support. The lower opening of the inner support tube is connected to the conveying pipeline, and the vent hole is disposed at the lower part of the inner support tube.

[0017] As a further improvement of this utility model, the preheating holes are arranged in an array at the preheating end, and the vent holes are arranged in an array at the lower part of the inner support tube.

[0018] As a further improvement of this utility model, the end of the conveying pipe is provided with an external thread structure for connection with the natural gas supply equipment, and a base for fixing is provided on the outside of the conveying pipe.

[0019] As a further improvement of this utility model, the preheating end is equipped with a temperature sensor to monitor the preheating temperature, and the delivery pipeline is equipped with a regulating valve to control the natural gas flow rate based on the temperature information fed back by the temperature sensor.

[0020] As a further improvement of this utility model, the preheating end is provided with an ignition device to ignite natural gas on the surface of the preheating end.

[0021] Beneficial effects:

[0022] The preheating support features an internal support tube connected to a delivery pipeline. Natural gas enters the support tube via the pipeline and exits through vents and heating holes, igniting at the preheating end surface to heat the mold. This structural design allows the natural gas to release heat evenly at the preheating end. The heating and vent holes ensure uniform heat distribution, effectively improving the mold's preheating effect, ensuring uniform heating, reducing mold damage or performance degradation caused by uneven heating, and extending mold life and wire drawing quality.

[0023] The preheating support is a hollow tubular structure closed at both ends, with an opening at the bottom for the conveying pipe to pass through. The structure is stable, and a base for fixing the conveying pipe is provided on the outside, further enhancing the stability of the entire device. It is not prone to shaking or tipping during use, ensuring operational safety. Meanwhile, supports are provided on both sides of the preheating end for placing the mold to be preheated, facilitating easy placement and removal of the mold by operators, making operation simple and convenient.

[0024] The vent is positioned on the surface of the inner support tube, away from the heating hole, and at the bottom. This allows for a more ample diffusion path between the inner support tube and the preheating support after the natural gas exits through the vent. This ensures more even distribution of the natural gas, resulting in more complete combustion upon reaching the heating hole and igniting, improving combustion efficiency and enhancing the preheating effect on the mold, thus ensuring uniform heating. Backfire is a dangerous phenomenon that can occur during gas combustion. If the vent is too close to the heating hole, the flame may backflow into the inner support tube through the heating hole and vent, causing a hazard. Positioning the vent further away increases the distance between the flame and the vent, reducing the risk of backfire, ensuring equipment safety, preventing explosions and other accidents, and protecting operators and the production environment.

[0025] The preheating end is recessed between the two support sections and equipped with baffles at both ends to prevent the mold from accidentally slipping during preheating, further improving operational safety. A temperature sensor on the preheating end monitors the preheating temperature in real time, and a regulating valve on the delivery pipeline controls the natural gas flow based on the temperature feedback from the sensor. This method allows for precise control of the mold's preheating temperature, meeting the preheating requirements of different molds, ensuring the stability and consistency of the preheating process, and contributing to improved production quality and efficiency in tungsten wire drawing. The preheating end is equipped with an ignition device, allowing direct ignition of natural gas on its surface without the need for additional ignition tools or complex ignition operations. This convenience and speed improve work efficiency and make the entire preheating process smoother. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a preheating device for a tungsten wire drawing die according to the present invention;

[0027] Figure 2 This is a cross-sectional view of the present invention;

[0028] The markings in the diagram are as follows: 1. Preheating support; 11. Preheating end; 111. Heating hole; 12. Inner pipe of the support; 121. Vent hole; 13. Support part; 14. Baffle; 2. Conveying pipe; 21. Base. Detailed Implementation

[0029] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0030] Implementation example:

[0031] like Figure 1-2 The diagram illustrates a preheating device for a tungsten wire drawing die. This device preheats the die before drawing the tungsten wire. It includes a preheating support 1 that supports the die during preheating, and a conveying pipe 2 connected to a natural gas supply device. The preheating device is connected to the natural gas supply device via an external threaded structure at the end of the conveying pipe 2. Natural gas enters the preheating support 1 through the conveying pipe 2, exits through a preheating end 11, and then generates a flame through an ignition device on the preheating end 11, heating the die placed above it. The preheating device is fixed in the processing position by a base 21 located on the outer periphery of the conveying pipe 2.

[0032] The preheating support 1 is a hollow tubular structure, closed at both ends by baffles 14, with an opening at the bottom for the conveying pipe to pass through and enter. The upper part of the preheating support 1 has a concave, arc-shaped preheating end 11. Along the extension direction of the preheating support 1, the preheating end 11 has a protruding cylindrical support part 13. A cylindrical wire drawing die is held between two support parts 13 on both sides, protruding downwards between the support parts 13. The shape of the preheating end 11 matches the die, and its arc-shaped surface is arrayed with several heating holes 111. Natural gas is discharged from the heating holes 111 and ignited to heat the die. Baffles 14 on both sides of the preheating end 11 prevent the die from slipping off during preheating. A temperature sensor is installed at the preheating end 11, and a regulating valve is installed in the conveying pipe 2 to adjust the natural gas flow rate based on the temperature information fed back by the temperature sensor.

[0033] The enclosed hollow interior houses the inner support tube 12. The delivery pipe 2 enters the preheating support 1 and connects to the inner support tube 12. The inner support tube 12 is also a closed-end tubular structure matching the preheating support 1. The lower opening of the inner support tube 12 connects to the delivery pipe 2, allowing natural hot air to enter the inner support tube 12 via the delivery pipe 2. A vent hole 121 is provided at the lower part of the inner support tube 12. Natural hot air is discharged through the vent hole 121 into the gap area between the preheating support 1 and the inner support tube 12. The vent hole 121 is located away from the heating hole 111, allowing the natural hot air to diffuse evenly inside the preheating support 1 before being discharged, achieving uniform combustion and preventing flames from flowing back into the delivery pipe 2 through the heating hole 111 and the vent hole 121, which could cause a hazard.

[0034] The original heating method used a long, high-power furnace to preheat small-sized dies, resulting in significant energy waste. This invention connects to a natural gas supply via a pipeline 2, delivering natural gas to the preheating support for localized heating of the die, effectively avoiding energy waste and reducing production costs. In multi-pass wire drawing machines, the original method required workers to avoid multiple dies preheating in the furnace while threading the wire, making operation complex. This preheating device is fixed to the processing position by a base, with the upper part of the preheating support recessed to form a preheating end that matches the die. The cylindrical drawing die can be directly clamped between two supports, with a fixed and clear position, facilitating worker operation during threading and improving production efficiency. Furthermore, in the original heating method, the preheated die was within the worker's threading range, easily causing burns from accidental contact. This preheating device has baffles on both sides of the preheating end to prevent the die from slipping during preheating, and the overall structural design makes the preheating position of the die relatively independent and fixed, reducing the possibility of workers accidentally touching the high-temperature die and improving operational safety. The device has a vent hole at the bottom of the inner tube of the support. Natural gas is discharged through the vent hole into the hollow area between the preheating support and the inner tube of the support. After being evenly diffused inside the preheating support, it is discharged from the heating hole and ignited. This makes the mold more evenly heated. Compared with the original heating method, it can effectively improve the preheating effect and quality of the wire drawing mold, thereby improving the wire drawing quality.

[0035] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A preheating device for a tungsten wire drawing die, characterized in that, This includes a hollow preheating support and a pipeline for supplying natural gas to preheat the mold. The upper end of the preheating support forms a preheating end for heating the mold. The preheating end is provided with a plurality of heating holes communicating with the hollow interior of the preheating support. The interior of the preheating support is provided with a support inner tube, the interior of which is hollow and communicates with the conveying pipeline. The support inner tube is provided with a plurality of vent holes. Natural gas enters the support inner tube from the conveying pipeline and exits through the vent holes and the heating holes in sequence. After being ignited on the surface of the preheating end, it heats the mold.

2. The preheating device for tungsten wire drawing dies according to claim 1, characterized in that, The preheating support is a hollow tubular structure closed at both ends, with an opening at the bottom for the conveying pipe to pass through.

3. The preheating device for tungsten wire drawing dies according to claim 1, characterized in that, The vent is located on the surface of the inner support tube away from the heating hole.

4. The preheating device for tungsten wire drawing dies according to claim 1, characterized in that, Support portions are provided on both sides of the preheating end, and the support portions are arranged along the upper surface of the preheating support for placing the mold to be preheated.

5. The preheating device for tungsten wire drawing dies according to claim 4, characterized in that, The preheating end is recessed between the support portions on both sides relative to the upper surface of the preheating support, and baffles are provided at both ends of the preheating end.

6. The preheating device for tungsten wire drawing dies according to claim 2, characterized in that, The inner support tube is a hollow tubular structure with closed ends, which is installed inside the hollow part of the preheating support. The lower opening of the inner support tube is connected to the conveying pipeline, and the vent is located at the lower part of the inner support tube.

7. The preheating device for tungsten wire drawing dies according to claim 1, characterized in that, The preheating holes are arranged in an array at the preheating end, and the venting holes are arranged in an array at the lower part of the inner support tube.

8. The preheating device for tungsten wire drawing dies according to claim 1, characterized in that, The end of the conveying pipe is provided with an external thread structure for connection with the natural gas supply equipment, and a base for fixing is provided on the outside of the conveying pipe.

9. The preheating device for tungsten wire drawing dies according to claim 1, characterized in that, The preheating end is equipped with a temperature sensor to monitor the preheating temperature, and the delivery pipeline is equipped with a regulating valve to control the natural gas flow rate based on the temperature information fed back by the temperature sensor.

10. The preheating device for tungsten wire drawing dies according to claim 1, characterized in that, The preheating end is equipped with an ignition device to ignite natural gas on the surface of the preheating end.

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