Device for preventing build-up in plasma spraying process
By using the gas ring structure of stainless steel material in the plasma spraying device to pass in inert gas to form an airflow protective layer, the problem of tumor accumulation in rotary target spraying is solved, and product quality and production efficiency are improved.
Patent Information
- Application Number
- CN202421110927.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In the rotating target spraying process, due to uneven thickness ratios of the spray powder and strong viscosity, the melted powder droplets accumulate at the front end of the spray gun, forming a tumor, affecting product quality and production efficiency.
A plasma spraying process device is designed to prevent tumor accumulation, including the outer ring and inner ring of stainless steel material, forming a gas chamber and inert gas is passed through the airflow protective layer to prevent the accumulation of powder droplets and inhibit the generation of tumor accumulation.
It effectively inhibits the occurrence of tumor accumulation during the spraying process, improves product quality and production fluency, and ensures the stability and efficiency of the rotating target spraying process.
Smart Images
Figure CN222250932U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rotating target materials, and more specifically, to a device for preventing nodules from being generated in a plasma spraying process. Background Art
[0002] In the process of rotating target spraying, the proportion of coarse and fine particles in the sprayed powder is often uneven, even -325μm micron-level fine powder accounts for more than 50%, or the material with strong viscosity is sprayed, which makes it very easy to produce molten powder droplets at the front end of the spray gun and the front end of the powder feeding needle during the spraying process, resulting in accumulation and solidification to form nodules, causing the nodules to spray onto the surface of the target or block the powder feeding needle, causing the entire spraying process to cause unstable product quality and reduced production efficiency. For example, when spraying Si-Al alloy targets, due to the fine powder of Si powder itself and the low melting point of Al, spraying without any measures often easily and frequently produces nodules.
[0003] Therefore, how to provide a device for inhibiting the formation of tumors has become a technical problem that urgently needs to be solved in this field. Utility Model Content
[0004] The utility model aims to provide a plasma spraying process device for preventing nodule generation which can suppress nodule generation.
[0005] The utility model provides a device for preventing nodules from forming in a plasma spraying process, comprising an outer ring for connecting to a plasma gun nozzle;
[0006] An inner ring is fixedly connected to the inner periphery of the outer ring, and the inner ring is spaced apart from the outer surface of the plasma gun nozzle to form an air chamber between the plasma gun nozzle and the inner ring, wherein the air outlet of the air chamber surrounds the outer periphery of the ion gun nozzle;
[0007] The air inlet hole is arranged on the outer ring and is communicated with the air chamber.
[0008] Optionally, the inner ring includes a first inner ring in an annular shape and a second inner ring in a truncated cone shape, the outer periphery of the first inner ring is fixedly connected to the inner periphery of the outer ring, and the flared end of the second inner ring is fixedly connected to the inner periphery of the first inner ring; along the spraying direction of the plasma gun nozzle, the flared end and the contracted end of the second inner ring are arranged in sequence.
[0009] Optionally, the inner diameter of the contracted end is 20±0.2 mm, and / or the outer diameter of the outer ring is 42.5±0.2 mm.
[0010] Optionally, in the axial direction of the outer ring, the first inner ring is connected to the extended middle portion of the outer ring, so that an annular air ring groove is formed by the outer ring, the first inner ring and the second inner ring on the side of the outer ring close to the contraction end.
[0011] Optionally, the maximum depth of the air ring groove is 2.5 mm-3.5 mm, and / or the maximum groove width of the air ring groove is 5.5 mm-6.5 mm.
[0012] Optionally, the air inlet hole penetrates the outer ring in the radial direction of the outer ring;
[0013] A plurality of air inlet holes are arranged, and the plurality of air inlet holes are evenly distributed along the circumference of the outer ring.
[0014] Optionally, six air inlet holes are provided, and the six air inlet holes are evenly distributed along the circumference of the outer ring.
[0015] Optionally, the material of the device for preventing nodule formation in the plasma spraying process is stainless steel.
[0016] Optionally, the stainless steel includes 304SUS or 316SUS stainless steel.
[0017] Optionally, the diameter of the air inlet hole is 2 mm.
[0018] According to the technical content disclosed in the utility model, the following beneficial effects are achieved:
[0019] The utility model provides a device for preventing nodules from forming in a plasma spraying process, which uses an outer ring connected to a plasma gun nozzle; an inner ring is spaced apart from the outer surface of the plasma gun nozzle to form an air chamber between the plasma gun nozzle and the inner ring, and an air outlet of the air chamber surrounds the outer periphery of the ion gun nozzle; when in use, an inert gas is introduced into the air chamber through an air inlet, and is sprayed out along with the gun nozzle during the spraying process, and the sprayed inert gas generates an airflow protection layer at the gun nozzle, so that unmelted powder droplets during the spraying process cannot form accumulation and shape at the gun nozzle, thereby inhibiting the formation of nodules and achieving a fundamental optimization and improvement of the quality of the target material.
[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.
[0022] Figure 1 This is a first-view structural diagram of the plasma spraying process device for preventing nodule generation of the utility model.
[0023] Figure 2 This is a structural diagram of the plasma spraying process anti-tumor generation device from the second viewing angle of the utility model.
[0024] Figure 3It is a cross-sectional view of a device for preventing nodules from forming in a plasma spraying process according to the utility model.
[0025] Figure 4 This is a third-angle perspective view of the device for preventing tumor formation in a plasma spraying process of the utility model.
[0026] Explanation of the reference numerals: 1. outer ring; 11. air inlet; 2. inner ring; 21. first inner ring; 22. second inner ring; 221. contraction end; 222. expansion end; 3. air chamber; 4. air ring groove. DETAILED DESCRIPTION
[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.
[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.
[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.
[0030] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.
[0031] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0032] The utility model aims to provide a plasma spraying process nodule prevention device which can solve the problem of nodule easily generated at the front end of a plasma gun body during the spraying process of a rotating target material, inhibit the generation of nodules, and improve production fluency and product quality and performance.
[0033] See also Figure 1The utility model discloses a device for preventing nodules from forming in a plasma spraying process. The device comprises an outer ring 1 and an inner ring 2 of an integrally formed metal ring structure. The material selected is 304SUS or 316SUS stainless steel. The reason for using stainless steel is that stainless steel has good high temperature resistance, high hardness, low plasticity, and stable corrosion resistance and oxidation resistance. From the perspective of material properties, a device that can withstand high temperatures and is smooth and corrosion-resistant is installed on the gun head, which can withstand a temperature of thousands of degrees at the center of the plasma flame, so that the device can reliably play a physical role in suppressing nodules. Generally speaking, the plasma spraying process nodule prevention device of the utility model is roughly annular in structure. After the outer ring 1 is installed at the junction of the plasma gun nozzle and the cathode, an air chamber 3 is formed between the plasma gun nozzle and the plasma spraying process nodule prevention device. The air outlet of the air chamber 3 surrounds the outer periphery of the ion gun nozzle. When in use, an inert gas is introduced into the air chamber 3 through the air inlet 11. During the spraying process, the inert gas is sprayed out together with the gun nozzle. The sprayed inert gas produces an airflow protection layer at the gun nozzle, so that the unmelted powder droplets during the spraying process cannot accumulate and form at the gun nozzle, thereby inhibiting the formation of nodules and achieving a fundamental optimization and improvement of the quality of the target material.
[0034] Combination Figures 2 to 4. Specifically, the outer ring 1 is used to connect to the plasma gun nozzle and plays a positioning role. Its outer dimensions are matched and processed according to the size of the plasma gun nozzle; the inner edge of the inner ring 2 is the outlet of the inert gas and plays a key role in isolating the accumulation; the inner ring 2 is fixedly connected to the inner circumference of the outer ring 1, and the inner ring 2 is spaced apart from the outer surface of the plasma gun nozzle to form an air chamber 3 between the plasma gun nozzle and the inner ring 2, and the outlet of the air chamber 3 surrounds the outer circumference of the ion gun nozzle; the air inlet 11 is opened on the outer ring 1 and communicates with the air chamber 3. The inner ring 2 includes a first inner ring 21 in an annular shape and a second inner ring 22 in a truncated cone shape. The plane where the first inner ring 21 is located is perpendicular to the axis of the plasma gun nozzle. The outer circumference of the first inner ring 21 is fixedly connected to the inner circumference of the outer ring 1, and the flared end 222 of the second inner ring 22 is fixedly connected to the inner circumference of the first inner ring 21; along the spraying direction of the plasma gun nozzle, the flared end 222 and the contracted end 221 of the second inner ring 22 are arranged in sequence. The second inner ring 22 is made into a truncated cone to simulate the angle of the flame ejected from the gun nozzle. The principle is: the flame of the plasma gun body is ejected from the muzzle at a certain angle. If there is no step, the flame will be hindered to a certain extent, and the impact force of our flame flow will be weakened. Then, by adding a step angle, the flame will be ejected along the step angle to form a natural flame angle, so that the intensity and heat of the flame will be better. Specifically, in the axial direction of the outer ring 1, the first inner ring 21 is connected to the extended middle part of the outer ring 1, so that the outer ring 1, the first inner ring 21 and the second inner ring 22 form an annular air ring groove 4 on the side of the outer ring 1 close to the contraction end 221. The maximum depth of the air ring groove 4 is 2.5mm-3.5mm, preferably 3mm; the maximum groove width of the air ring groove 4 is 5.5mm-6.5mm, preferably 6mm. The role of the air ring groove 4 is to improve the cooling effect, so that the air ring temperature is kept at room temperature under the action of strong cooling water. The thicker the material, the worse the cooling. It should be noted that the so-called cooling water is not directly introduced into the gas cap device. The cooling water flows inside the large nozzle of the plasma gun body. Our gas cap is in contact with the nozzle. The purpose of the groove on the gas ring is to better transfer the low temperature of the large nozzle to the gas cap.
[0035] Further, the inner diameter of the contraction end 221 is 20±0.2 mm, and / or the outer diameter of the outer ring 1 is 42.5±0.2 mm.
[0036] Furthermore, the air inlet hole 11 penetrates the outer ring 1 in the radial direction of the outer ring 1; a plurality of air inlet holes 11 are provided, and the plurality of air inlet holes 11 are evenly distributed along the circumference of the outer ring 1. Specifically, six holes with a diameter of φ2 mm are drilled at 60° radially around the radial direction of the outer ring 1, and the function is to connect the inert gas, which is sprayed out along with the gun nozzle during the spraying process, and form an airflow protection layer at the gun nozzle to isolate the formation of nodules.
[0037] In summary, the plasma spraying process anti-tumor generation device provided by the utility model adds a metal gas ring at the front end of the plasma spray gun body, introduces a certain amount and pressure of inert gas, and forms an inert gas protection ring around the nozzle so that the unmelted powder droplets cannot form accumulation and shape at the nozzle mouth during the spraying process, thereby inhibiting the generation of tumors and optimizing and improving the quality of the target material. The utility model has a simple structure and a clear function. By installing a SUS gas ring outside the plasma gun body, it can inhibit the generation of tumors, ensure the smoothness of the process of the rotating target during the spraying process, improve production efficiency, and improve the quality and performance of the target product.
[0038] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.
Claims
1. A device for preventing nodule formation in a plasma spraying process, characterized in that: include: An outer ring, used to connect to the plasma gun nozzle; An inner ring, fixedly connected to the inner circumference of the outer ring, the inner ring and the outer surface of the plasma gun nozzle are spaced apart to form an air chamber between the plasma gun nozzle and the inner ring, and the air outlet of the air chamber surrounds the outer circumference of the ion gun nozzle; An air inlet hole is provided on the outer ring and is communicated with the air chamber.
2. The device for preventing buildup during plasma spraying according to claim 1, characterized in that: The inner ring includes a first inner ring in a ring shape and a second inner ring in a truncated cone shape. The outer periphery of the first inner ring is fixedly connected to the inner periphery of the outer ring, and the flared end of the second inner ring is fixedly connected to the inner periphery of the first inner ring. Along the spraying direction of the plasma gun nozzle, the flared end and the contracted end of the second inner ring are arranged in sequence.
3. The device for preventing buildup during plasma spraying according to claim 2, characterized in that: The inner diameter of the contracted end is 20±0.2 mm, and / or the outer diameter of the outer ring is 42.5±0.2 mm.
4. The device for preventing nodule formation in plasma spraying process according to claim 2 or 3, characterized in that: In the axial direction of the outer ring, the first inner ring is connected to the extended middle portion of the outer ring, so that an annular air ring groove is formed by the outer ring, the first inner ring and the second inner ring on the side of the outer ring close to the contraction end.
5. The device for preventing buildup during plasma spraying process according to claim 4, characterized in that: The maximum depth of the air ring groove is 2.5 mm-3.5 mm, and / or the maximum groove width of the air ring groove is 5.5 mm-6.5 mm.
6. The device for preventing buildup in a plasma spraying process according to any one of claims 1 to 3, characterized in that: The air inlet hole penetrates the outer ring along the radial direction of the outer ring; A plurality of air inlet holes are provided, and the plurality of air inlet holes are evenly distributed along the circumference of the outer ring.
7. The device for preventing buildup during plasma spraying according to claim 6, characterized in that: Six air inlet holes are provided, and the six air inlet holes are evenly distributed along the circumference of the outer ring.
8. The device for preventing buildup during plasma spraying process according to claim 1 or 2, characterized in that: The material of the device for preventing nodule generation in the plasma spraying process is stainless steel.
9. The device for preventing buildup during plasma spraying according to claim 8, characterized in that: The stainless steel includes 304SUS or 316SUS stainless steel.
10. The device for preventing buildup in a plasma spraying process according to any one of claims 1 to 3, characterized in that: The diameter of the air inlet hole is 2 mm.