Partition heating device for preparing gradient hardness PVD (Physical Vapor Deposition) coating

Abstract

The utility model relates to the field of heating devices, in particular to a partition heating device for preparing a gradient hardness PVD (Physical Vapor Deposition) coating, which comprises a heating box and a partition heating assembly, a partition heating assembly used for conducting partition heating on a workpiece according to the temperature is installed in the heating box. The partition heating assembly comprises a supporting base plate, a heating pipe, a partition plate, a constant-temperature plate, a driving motor, a driving rod, a supporting disc, a limiting plate, a rubber plate and a heat insulation plate. According to the utility model, a plurality of groups of heating pipes are arranged in the heating box layer by layer in a progressive increase manner, workpieces are placed in the specified subareas for heating treatment according to the heating requirements of coatings, the workpieces are uniformly heated layer by layer, the uniformity and quality of the coatings are ensured, and the subarea heating allows independent temperature control of different areas, so that the heating efficiency is improved. The temperatures of different areas are accurately controlled, the performance of the coating can be optimized, and the adhesive force of the coating and the base material is improved.

Description

Technical Field

[0001] This utility model relates to the field of heating devices, and in particular to a zoned heating device for preparing gradient hardness PVD coatings. Background Technology

[0002] Gradient hardness PVD coating preparation is a technique for depositing thin films on the surface of an object. It achieves coating by evaporating materials and depositing them onto the surface of a substrate in a vacuum environment. It is widely used in fields such as electronics, optics, medical devices, and tool manufacturing. Gradient hardness PVD coating preparation involves forming a gradient structure of different hardnesses on the surface of the substrate of the coated cemented carbide tool to improve the performance and lifespan of the workpiece. The heating device for gradient hardness PVD coating preparation is a device used in the physical vapor deposition (PVD) process to heat the workpiece to achieve coating deposition.

[0003] Existing heating devices typically use a tray to place workpieces into the equipment for heating. Since different workpieces require different heating temperatures, uniform heating makes it difficult to ensure that each workpiece reaches the ideal heating temperature, resulting in uneven heating, which affects product quality. At the same time, heating in batches requires additional heating time and reduces overall production efficiency.

[0004] Therefore, for the existing heating devices mentioned above, workpieces are usually placed on a tray and put into the equipment for heating treatment. Since different workpieces require different heating temperatures, uniform heating makes it difficult to ensure that each workpiece reaches the ideal heating temperature, resulting in uneven heating and affecting product quality. At the same time, batch heating is required, which consumes additional heating time and reduces overall production efficiency. A zoned heating device for gradient hardness PVD coating preparation can be designed. By setting multiple sets of heating tubes in layers, the workpiece is placed in a designated zone for heating treatment according to the heating requirements of the coating. This allows for independent temperature control of different areas, optimizes the performance of the coating, and improves the adhesion between the coating and the substrate. Utility Model Content

[0005] To overcome the problems of existing heating devices, which typically use a tray to place workpieces into the equipment for heating, it is difficult to ensure that each workpiece reaches the ideal heating temperature due to different heating requirements. This results in uneven heating, affecting product quality. In addition, batch heating is required, which consumes extra heating time and reduces overall production efficiency.

[0006] The technical solution of this utility model is as follows: a zoned heating device for preparing gradient hardness PVD coatings, comprising a heating box and a zoned heating assembly; the heating box is equipped with a zoned heating assembly for heating workpieces in zones according to temperature, the zoned heating assembly includes a support pad, heating tubes, partitions, a constant temperature plate, a drive motor, a drive rod, a support plate, a limiting plate, a rubber plate, and a heat insulation plate; heating tubes are fixedly fixedly arranged on the inner wall of the heating box from bottom to top, a control module is fixedly arranged on the outer wall of the heating box, and a transmission rod is provided on the outer wall of the heating tube at one end of the heating tube, the heating tube being electrically connected to the control module through the transmission rod.

[0007] Preferably, by progressively arranging multiple sets of heating tubes inside the heating chamber, the workpiece is placed in a designated zone for heating according to the heating requirements of the coating. This ensures uniform layered heating of the workpiece, guaranteeing the uniformity and quality of the coating. Zoned heating allows for independent temperature control of different areas, precisely controlling the temperature of different areas, optimizing coating performance, and improving the adhesion between the coating and the substrate. Furthermore, zoned heating allows for the simultaneous processing of multiple workpieces, adapting to workpieces with different heating requirements. When it is necessary to heat the same batch of parts at the same temperature, the heating tubes are turned off and a constant temperature plate is used for heating, keeping the heating temperature of multiple sets of workpieces in the same batch within a preset range. This ensures the uniformity and quality of coating heating, prevents overheating of workpieces, reduces the processing time required for a single workpiece, and accelerates the coating heating process.

[0008] Preferably, a support pad is fixedly installed inside the heating box between two sets of heating tubes. Multiple sets of constant temperature plates are fixedly laid on the bottom of the support pad. One end of the support pad is electrically connected to the control module, and a partition is fixedly installed on the outer end of the support pad.

[0009] Preferably, a drive motor is fixedly installed at the upper end of the heating box, and a connecting line is provided between the drive motor and the control module. One end of the drive motor is located inside the heating box and has a drive rod. The outer end of the drive rod is located on one side of the support pad and has a support plate symmetrically provided.

[0010] Preferably, multiple sets of limiting plates are provided between the two sets of support plates, and the two sets of support plates are fixed by inserting the limiting plates. One end of the limiting plate is fixed with a limiting bolt at the upper end of the support plate.

[0011] Preferably, the inner walls of the two sets of support plates are covered with multiple sets of rubber plates, and multiple sets of anti-slip pads are fixedly installed on the bottom inner side of the support plates.

[0012] Preferably, a positioning block is fixedly provided at the outer end of the heating box, and a heat insulation plate is movably provided inside the positioning block. A sealing strip is fixedly provided on the inner wall of the heat insulation plate, and the heat insulation plate is fastened and sealed with the heating box through the sealing strip.

[0013] Preferably, the outer end of the heat insulation plate is provided with multiple sets of screws, and the heat insulation plate is threadedly fixed to the heating box by the multiple sets of screws.

[0014] The beneficial effects of this utility model are:

[0015] 1. Compared to traditional heating devices, this system uses multiple heating tubes arranged in layers inside the heating chamber. Workpieces are placed in designated zones for heating according to the coating's heating requirements, ensuring uniform layered heating and guaranteeing coating uniformity and quality. Zoned heating allows for independent temperature control of different areas, precisely controlling the temperature in each zone, optimizing coating performance, and improving adhesion between the coating and the substrate. Furthermore, zoned heating allows for the simultaneous processing of multiple workpieces, adapting to different heating needs. When heating a batch of parts at the same temperature is required, the heating tubes are turned off, and a constant temperature plate is used to maintain the heating temperature of multiple workpieces within a preset range, ensuring uniform coating heating and quality, preventing overheating, reducing the processing time for individual workpieces, and accelerating the coating heating process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a zoned heating device for preparing gradient hardness PVD coating according to this utility model;

[0017] Figure 2 The diagram shown is a schematic diagram of the heating tube structure of a zoned heating device for preparing gradient hardness PVD coating according to this utility model.

[0018] Figure 3 The diagram shown is a schematic of the constant temperature plate structure of a zoned heating device for preparing gradient hardness PVD coating according to this utility model.

[0019] Figure 4 The diagram shown is a schematic representation of the support plate structure of a zoned heating device for preparing gradient hardness PVD coatings according to this invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Heating box; 201. Support pad; 202. Heating tube; 203. Partition; 204. Constant temperature plate; 205. Control module; 206. Transmission rod; 207. Drive motor; 208. Connecting wire; 209. Drive rod; 210. Support plate; 211. Limiting plate; 212. Limiting bolt; 213. Rubber plate; 214. Anti-slip pad; 215. Heat insulation plate; 216. Positioning block; 217. Screw. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Gradient hardness PVD coating is an advanced surface treatment technology that uses physical vapor deposition to form a coating with a gradient of hardness on the surface of a workpiece. This technology can significantly improve the surface properties of the workpiece, including hardness, wear resistance, and corrosion resistance. PVD coating is a physical vapor deposition coating technology that achieves thin film material deposition through a physical process. In this process, raw materials enter the deposition area in gaseous form and form a solid film on the substrate surface. The preparation of gradient hardness PVD coating involves designing different material layers with different hardnesses in the coating, thus forming a hardness gradient to meet different application requirements. Gradient hardness PVD coatings can provide extremely high surface hardness, typically between 1500 HV and 4500 HV, and in some special cases up to 9000 HV. The coating has advantages such as high purity, high density, high adhesion, and good uniformity, and is widely used in materials science, electronic engineering, optics, and mechanical manufacturing, especially in applications requiring improved hardness, wear resistance, and corrosion resistance. The gradient or multi-layer coating design improves the coating's adhesion to the substrate, coating toughness, and resistance to crack propagation.

[0023] The zoned heating device for gradient hardness PVD coating preparation is used to precisely control the temperature of the workpiece during physical vapor deposition (PVD) to achieve coatings with different hardnesses in different areas. Temperature control is crucial; the process temperature for PVD coatings is typically between 50 and 600 degrees Celsius, a range lower than that of chemical vapor deposition (CVD). Therefore, PVD is suitable for a wider range of substrates, especially those sensitive to high temperatures. Temperature control is essential for ensuring effective coating deposition, minimizing material deformation, and applicability to various materials. Unlike other deposition methods, PVD is highly efficient and requires no additional machining or heat treatment after coating. This efficiency is partly due to the precise temperature control during the coating process, ensuring the coated part maintains its integrity and desired performance. The zoned heating device for gradient hardness PVD coating preparation achieves efficient and uniform heating of the workpiece by precisely controlling the temperature of different areas, thereby preparing PVD coatings with gradient hardness characteristics, improving workpiece performance and service life.

[0024] Although there are many heating devices for preparing gradient hardness PVD coatings on the market, some problems and challenges still exist in practical applications. Existing heating devices usually use a placement tray to put the workpiece into the equipment for heating treatment. Since different workpieces require different heating temperatures, uniform heating makes it difficult to ensure that each workpiece reaches the ideal heating temperature, resulting in uneven heating, which affects product quality. At the same time, batch heating is required, which consumes additional heating time and reduces overall production efficiency.

[0025] Please see Figures 1-4This utility model provides an embodiment: a partitioned heating device for preparing gradient hardness PVD coatings, including a heating box 1 and a partitioned heating assembly; the heating box 1 is equipped with a partitioned heating assembly for partitioned heating of workpieces according to temperature, the partitioned heating assembly includes a support pad 201, heating tubes 202, partitions 203, a constant temperature plate 204, a drive motor 207, a drive rod 209, a support plate 210, a limiting plate 211, a rubber plate 213, and a heat insulation plate 215. Heating tubes 202 are fixedly fixedly arranged in ascending order from bottom to top on the inner wall of the heating box 1, and a control module 205 is fixedly provided on the outer wall of the heating box 1. A transmission rod 206 is provided on the outer wall of the heating box 1 at one end of the heating tubes 202, and the heating tubes 202 are electrically connected to the control module 205 through the transmission rod 206.

[0026] Please see Figures 1-3 In this embodiment, a support plate 201 is fixedly installed inside the heating box 1 between two sets of heating tubes 202. Multiple sets of constant temperature plates 204 are fixedly laid on the bottom of the support plate 201. One end of the support plate 201 is electrically connected to the control module 205, and a partition plate 203 is fixedly installed on the outer end of the support plate 201. By turning off the heating tubes 202 and using the constant temperature plates 204 to heat the same batch of parts when it is necessary to heat them at the same temperature, the heating temperature of multiple sets of workpieces in the same batch is kept within a preset range. This ensures the uniformity and quality of coating heating, prevents the workpieces from being overheated, and reduces the processing time required for a single workpiece. To expedite the heating process of the coating, a drive motor 207 is fixedly installed at the upper end of the heating box 1. A connecting line 208 is provided between the drive motor 207 and the control module 205. One end of the drive motor 207 is located inside the heating box 1 and has a drive rod 209. The outer end of the drive rod 209 is located on one side of the support plate 201 and has a support plate 210 symmetrically provided. By using the drive motor 207 to connect the drive rod 209 to drive the support plate 210, the workpiece is prevented from rotating and heated, so that the coating is evenly distributed on the surface of the workpiece, which helps the coating to better adhere to the surface of the workpiece and enhances the bonding force between the coating and the substrate.

[0027] Please see Figures 2-3In this embodiment, multiple sets of limiting plates 211 are provided between the two sets of support plates 210. The two sets of support plates 210 are fixed by insertion of the limiting plates 211. One end of the limiting plate 211 is fixed with a limiting bolt 212 at the upper end of the support plate 210. By using the limiting plates 211 and the limiting bolts 212 to fix the support plates 210, they can be disassembled and replaced according to the heating requirements of different workpieces, reducing equipment adjustment and preparation time and improving equipment flexibility. Multiple sets of rubber plates 213 are laid around the inner wall of the two sets of support plates 210, and multiple sets of anti-slip pads 214 are fixed at the bottom inner side of the support plates 210. By using the rubber plates 213 to prevent the workpiece from being impacted during rotation heating, the impact force that may occur during the rotation of the workpiece is effectively absorbed and reduced, protecting the surface of the workpiece from damage, avoiding bumps and collisions, and ensuring the appearance quality of the product.

[0028] Please see Figures 2-4 In this embodiment, a positioning block 216 is fixedly provided at the outer end of the heating box 1, and a heat insulation plate 215 is movably provided inside the positioning block 216. A sealing strip is fixedly provided on the inner wall of the heat insulation plate 215. The heat insulation plate 215 is fastened and sealed to the heating box 1 through the sealing strip. By using the heat insulation plate 215 for sealing and heat insulation, heat transfer is reduced, the internal temperature of the equipment is lowered, energy consumption is reduced, and the uniformity and quality of the coating are improved. Multiple sets of screws 217 are provided at the outer end of the heat insulation plate 215. The heat insulation plate 215 is threadedly fixed to the heating box 1 by the multiple sets of screws 217. By using the screws 217 to fix the heat insulation plate 215, accidental opening is prevented, so that the heat insulation plate 215 remains stable under high temperature and pressure changes, preventing heat leakage or equipment damage caused by accidental opening, thereby improving operational safety.

[0029] During operation, two sets of support plates 210 are first installed on the outer wall of the drive rod 209 using a limiting plate 211. The limiting plate 211 is fixed with limiting bolts 212 to prevent loosening and detachment during rotation. The support plates 210 can be easily replaced according to the heating requirements of different workpieces, reducing equipment adjustment and preparation time. After the support plates 210 are installed, the workpieces to be heated are placed sequentially inside the support plates 210, supported by anti-slip pads 214. When placing the workpieces, they are placed in designated zones according to their required heating temperatures. After placement, the heat insulation plate 215 is closed to seal the heating chamber 1, reducing heat transfer during heating and lowering energy consumption. After the heat insulation plate 215 is closed, the heating tubes 202 inside each zone are activated using the control module 205. Zoned heating allows for independent temperature control of different areas, ensuring uniform heating. Layered heating of the workpiece allows for precise temperature control in different areas, optimizing coating performance and ensuring adhesion between the coating and the substrate. The zoned heating process enables simultaneous processing of multiple workpieces to meet varying heating requirements. When heating a batch of parts at the same temperature, the control module 205 shuts off the heating tube 202 and activates the constant temperature plate 204, maintaining the heating temperature of multiple workpieces within a preset range. This ensures uniformity and quality of coating heating, prevents overheating, reduces processing time for individual workpieces, and accelerates coating heating. Furthermore, during workpiece heating, the drive motor 207, connected to the drive rod 209, can be activated to drive the support plate 210 to prevent workpiece rotation during heating. This ensures uniform distribution of the coating across the workpiece surface, aiding in better adhesion and achieving zoned heating of the coating.

[0030] Through the above steps, by progressively arranging multiple sets of heating tubes 202 inside the heating chamber 1, the workpiece is placed in a designated zone for heating according to the heating requirements of the coating. The workpiece is heated uniformly in layers, ensuring the uniformity and quality of the coating. Zoned heating allows for independent temperature control of different areas, precisely controlling the temperature of different areas, which can optimize the performance of the coating and improve the adhesion between the coating and the substrate. Furthermore, zoned heating can process multiple workpieces simultaneously, adapting to workpiece processing with different heating requirements. When it is necessary to heat the same batch of parts at the same temperature, the heating tubes 202 are turned off and the constant temperature plate 204 is used for heating treatment, keeping the heating temperature of multiple sets of workpieces in the same batch within a preset range, ensuring the uniformity and quality of coating heating, preventing overheating of workpieces, reducing the time required to process a single workpiece, and accelerating the heating process of the coating.

Claims

1. A zoned heating device for preparing gradient hardness PVD coatings, comprising a heating chamber (1); characterized in that: It also includes a zoned heating assembly; the interior of the heating box (1) is equipped with a zoned heating assembly for heating workpieces in zones according to temperature. The zoned heating assembly includes a support pad (201), a heating tube (202), a partition (203), a constant temperature plate (204), a drive motor (207), a drive rod (209), a support plate (210), a limit plate (211), a rubber plate (213), and a heat insulation plate (215). The inner wall of the heating box (1) is fixed with heating tubes (202) in ascending order from bottom to top. The outer wall of the heating box (1) is fixed with a control module (205). One end of the heating tube (202) is connected to the outer wall of the heating box (1) with a transmission rod (206). The heating tube (202) is electrically connected to the control module (205) through the transmission rod (206).

2. The partitioned heating device for preparing gradient hardness PVD coatings according to claim 1, characterized in that: Inside the heating box (1), a support plate (201) is fixedly installed between two sets of heating tubes (202). Multiple sets of constant temperature plates (204) are fixedly laid on the bottom of the support plate (201). One end of the support plate (201) is electrically connected to the control module (205). A partition plate (203) is fixedly installed on the outer end of the support plate (201).

3. The partitioned heating device for preparing gradient hardness PVD coatings according to claim 1, characterized in that: A drive motor (207) is fixedly installed at the upper end of the heating box (1). A connecting line (208) is provided between the drive motor (207) and the control module (205). One end of the drive motor (207) is located inside the heating box (1) and a drive rod (209) is provided. The outer end of the drive rod (209) is located on one side of the support pad (201) and a support plate (210) is symmetrically provided.

4. The partitioned heating device for preparing gradient hardness PVD coatings according to claim 3, characterized in that: Multiple sets of limiting plates (211) are provided between the two sets of support plates (210). The two sets of support plates (210) are fixed by inserting the limiting plates (211). One end of the limiting plate (211) is located at the upper end of the support plate (210) and a limiting bolt (212) is fixed thereon.

5. The partitioned heating device for preparing gradient hardness PVD coatings according to claim 3, characterized in that: Multiple sets of rubber plates (213) are laid around the inner walls of the two sets of support plates (210), and multiple sets of anti-slip pads (214) are fixedly installed on the inner bottom of the support plates (210).

6. The partitioned heating device for preparing gradient hardness PVD coatings according to claim 5, characterized in that: A positioning block (216) is fixedly provided at the outer end of the heating box (1). A heat insulation plate (215) is movably provided inside the positioning block (216). A sealing strip is fixedly provided on the inner wall of the heat insulation plate (215). The heat insulation plate (215) is sealed to the heating box (1) by means of the sealing strip.

7. The partitioned heating device for preparing gradient hardness PVD coatings according to claim 6, characterized in that: The outer end of the heat insulation plate (215) is provided with multiple sets of screws (217), and the heat insulation plate (215) is threadedly fixed to the heating box (1) by the multiple sets of screws (217).

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