High-temperature-resistant fixing tool for surface heat treatment of cast workpiece

Abstract

The utility model provides a surface heat treatment fixing tool for a high-temperature-resistant cast workpiece, which belongs to the field of surface treatment of high-temperature castings and comprises a placing frame body, a placing component is arranged in the placing frame body, and a ventilation component is arranged on one side of the placing frame body. Stable supporting, dynamic fixing and efficient heat dissipation management of a workpiece are achieved, the bearing platform made of high-temperature-resistant ceramic materials is adopted in the containing assembly, elastic clamping mechanisms distributed at the four corners are combined, the workpiece shape can be self-adapted, stable supporting and dynamic fixing are provided, and the machining efficiency is improved. The ventilation assembly accelerates heat diffusion and guides natural convection of cold air through the design of heat dissipation fins and through type ventilation grooves, directional heat dissipation circulation is formed, the temperature peak value around the workpiece is effectively reduced, heat damage to the tool caused by local overheating is avoided, meanwhile, the temperature control requirement of the heat treatment technology is balanced, and the service life of the tool is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of surface treatment of high-temperature castings, and more specifically, to a heat treatment fixing tool for high-temperature resistant castings. Background Technology

[0002] In the manufacturing process of high-temperature alloy castings, surface heat treatment is the core process to improve the wear resistance, fatigue resistance and high-temperature performance of the workpiece. Usually, the workpiece that needs to be heat treated is placed on top of the support frame for heat treatment.

[0003] In existing technologies, rigid clamping structures are often used. Their planar contact clamping can easily lead to stress concentration when the workpiece expands due to heat. Furthermore, the closed heat dissipation channels can cause local overheating, which can easily cause workpiece deformation during heat treatment. Therefore, a high-temperature resistant casting workpiece surface heat treatment fixing tool is proposed. Utility Model Content

[0004] The purpose of this utility model is to address the fact that existing technologies often employ rigid clamping structures, which are prone to stress concentration when the workpiece expands due to heat due to planar contact clamping. Furthermore, the closed heat dissipation channels can cause localized overheating, which can easily lead to workpiece deformation during heat treatment.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] A heat treatment fixing tool for high-temperature resistant cast workpieces is provided to improve the above-mentioned problems.

[0007] The present invention is as follows: it includes a placement rack body, the interior of which is provided with a placement component, and a ventilation component is provided on one side of the placement rack body;

[0008] The placement assembly includes a horizontal plate, a placement plate, fixing springs, and clamping balls. The horizontal plate is located on the top of the placement frame body, the placement plate is located on the top of the horizontal plate, the four fixing springs are respectively located at the four corners of the top of the placement plate, and the clamping balls are located on the top of the fixing springs. The placement plate is made of high-temperature resistant ceramic.

[0009] As a preferred technical solution of this utility model, the ventilation component includes heat dissipation fins and ventilation slots. A plurality of heat dissipation fins are disposed at the bottom of the horizontal plate, the ventilation slots are opened at the top of the horizontal plate, and the other end extends through to the bottom of the horizontal plate. The heat dissipation fins are located below the ventilation slots.

[0010] As a preferred technical solution of this utility model, the surface of the clamping ball is provided with three protrusions for limiting the workpiece, the width of the protrusions is 3mm, and the protrusions are located above the fixing spring.

[0011] As a preferred technical solution of this utility model, a detachable filter screen is embedded inside the ventilation slot. The detachable filter screen has a pore size of 1mm and is woven from nickel-based high-temperature alloy wire.

[0012] As a preferred technical solution of this utility model, fixing blocks are provided on both sides of the placement rack body, and a baffle plate is slidably connected to the bottom of the fixing blocks, with the baffle plate located on one side of the placement rack body.

[0013] As a preferred technical solution of this utility model, a collection box is provided on the inner side of the placement rack body, the collection box is located below one side of the placement plate, and the collection box is located on one side of the shielding plate.

[0014] As a preferred technical solution of this utility model, two support plates are respectively provided on both sides of the bottom of the placement rack body, and a reinforcing rod is provided between the two support plates. The two ends of the reinforcing rod pass through the interior of the two support plates respectively, and the top of the support plate and the bottom of the cover plate are engaged.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. By setting up the placement components, a bearing platform and elastic clamping mechanism made of high-temperature resistant materials are realized to provide stable support and dynamic fixation for the workpiece. The elastic elements distributed at the four corners can adapt to the shape of the workpiece. Combined with the friction enhancement structure at the top contact point, it can buffer mechanical impact and prevent workpiece displacement in high-temperature environments. At the same time, the heat resistance properties of the material are used to maintain the rigidity of the overall structure, ensuring accurate positioning and safety protection of the workpiece during heat treatment.

[0017] 2. Through the ventilation components, efficient heat management is achieved by integrating the heat dissipation structure and airflow channel design. The multi-layered extended surface at the bottom accelerates heat diffusion, and the through path from top to bottom guides the natural convection of external cold air, forming a directional heat dissipation cycle. This effectively reduces the temperature peak around the workpiece, avoids local overheating and heat damage to the equipment, and balances the temperature control requirements of the heat treatment process, extending the tool's service life. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the high-temperature resistant casting workpiece surface heat treatment fixing tool provided by this utility model;

[0019] Figure 2 This is a left-side perspective sectional view of the high-temperature resistant casting workpiece surface heat treatment fixing tool provided by this utility model.

[0020] Figure 3 A schematic diagram of the placement plate, fixing spring and clamping ball of the high-temperature resistant casting workpiece surface heat treatment fixing tool provided by this utility model;

[0021] Figure 4 A right-side structural schematic diagram of the high-temperature resistant casting workpiece surface heat treatment fixing tool provided by this utility model;

[0022] Figure 5 This utility model provides a high-temperature resistant casting workpiece surface heat treatment fixing tool. Figure 2 Enlarged structural diagram at point A in the middle.

[0023] The diagram shows: 1. Placement rack body; 2. Placement component; 3. Ventilation component; 4. Raised strip; 5. Removable filter screen; 6. Fixing block; 7. Baffle plate; 8. Collection box; 9. Support plate; 10. Reinforcing rod; 201. Horizontal plate; 202. Placement plate; 203. Fixing spring; 204. Clamping ball; 301. Heat dissipation fins; 302. Ventilation slot. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] like Figure 1-5 As shown, this embodiment proposes a heat treatment fixing tool for high-temperature resistant cast workpieces, including a placement frame body 1, a placement component 2 is provided inside the placement frame body 1, and a ventilation component 3 is provided on one side of the placement frame body 1.

[0029] like Figure 3 and Figure 5As shown, the placement assembly 2 includes a horizontal plate 201, a placement plate 202, fixing springs 203, and clamping balls 204. The horizontal plate 201 is located on top of the placement frame body 1, and the placement plate 202 is located on top of the horizontal plate 201. Four fixing springs 203 are respectively located at the four corners of the top of the placement plate 202, and the clamping balls 204 are located on top of the fixing springs 203. The placement plate 202 is made of high-temperature resistant ceramic. The horizontal plate 201 serves as a basic support structure and is fixed to the top of the placement frame body 1. The placement plate 202 is located on the horizontal plate 201 and directly supports the workpiece. Its material is high-temperature resistant ceramic to ensure stability and resistance to thermal deformation in high-temperature environments. A fixing spring 203 is installed at each of the four corners of the top of the placement plate 202, and the top of the fixing spring 203 is connected to the clamping ball 204 to form a flexible clamping system. By fixing the elastic deformation of the spring 203, the clamping ball 204 can adapt to workpieces of different shapes or sizes, providing a buffering effect to avoid damage to the workpiece from rigid collisions, and achieving stable fixation through elastic pressure, which is especially suitable for the dynamic thermal stress environment of surface heat treatment.

[0030] like Figure 5 As shown, the ventilation assembly 3 includes heat dissipation fins 301 and ventilation slots 302. Multiple heat dissipation fins 301 are disposed at the bottom of the horizontal plate 201, and the ventilation slots 302 are formed at the top of the horizontal plate 201, with one end extending to the bottom of the horizontal plate 201. The heat dissipation fins 301 are located below the ventilation slots 302. Multiple heat dissipation fins 301 are installed at the bottom of the horizontal plate 201 to accelerate heat dissipation by increasing the surface area. The ventilation slots 302, extending from the top to the bottom of the horizontal plate 201, form a vertical airflow channel. The heat dissipation fins 301 are located below the ventilation slots 302 and work in conjunction with them: when external airflow enters through the ventilation slots 302, the heat dissipation fins 301 further guide the airflow diffusion, enhancing convective heat dissipation efficiency. This design effectively reduces heat accumulation around the placement plate 202 and the workpiece, avoiding long-term thermal damage to the fixed tool structure caused by high temperatures, while ensuring uniform cooling of the workpiece during heat treatment.

[0031] like Figure 3 As shown, the surface of the clamping ball 204 is provided with three protrusions 4 for limiting the workpiece. The protrusions 4 are 3mm wide and are located above the fixing spring 203. The top of the clamping ball 204 has three 3mm wide protrusions 4 arranged in a ring, located above the fixing spring 203 (i.e., on the side in contact with the workpiece). The protrusions 4 achieve a mechanical limiting function by increasing the friction coefficient of the contact surface, preventing the workpiece from shifting due to vibration or thermal expansion during heat treatment. The 3mm width design provides sufficient clamping force while avoiding excessive contact area that would affect heat dissipation. The elastic combination of the protrusions 4 and the fixing spring 203 forms a dual fixing mechanism of "flexible clamping + rigid limiting," further improving workpiece stability.

[0032] like Figure 5 As shown, a removable filter 5 is embedded inside the ventilation slot 302. The removable filter 5 has a pore size of 1mm and is woven from nickel-based high-temperature alloy wire. The removable filter 5 is embedded in the ventilation slot 302 by a snap-fit ​​or threaded structure and can be disassembled for cleaning or replacement periodically.

[0033] like Figure 4 As shown, fixing blocks 6 are provided on both sides of the placement rack body 1, and a baffle plate 7 is slidably connected to the bottom of the fixing blocks 6. The baffle plate 7 is located on one side of the placement rack body 1. Fixing blocks 6 are added to both sides of the placement rack body 1, and their bottoms are slidably connected to the baffle plate 7 through slide rails or guide grooves. The baffle plate 7 can move horizontally along the fixing blocks 6 to cover or expose the side space of the placement rack.

[0034] like Figure 2 As shown, a collection box 8 is provided on the inner side of the placement rack body 1. The collection box 8 is located below one side of the placement plate 202 and on one side of the baffle plate 7. The collection box 8 is installed by a pull-out or flip-up structure and is used to collect oxide layer debris, coolant drips, or other process residues that fall off during heat treatment.

[0035] like Figure 4 As shown, two support plates 9 are respectively provided on both sides of the bottom of the placement rack body 1. A reinforcing rod 10 is provided between the two support plates 9, with both ends of the reinforcing rod 10 penetrating into the interior of the two support plates 9. The top of the support plate 9 is engaged with the bottom of the cover plate 7. Two support plates 9 are installed on each side of the bottom of the placement rack body 1, and the support plates 9 are connected by the reinforcing rod 10. The two ends of the reinforcing rod 10 penetrate the support plate 9 and are fixed by thread or welding to form a rigid frame structure. The top of the support plate 9 is designed with a groove that fits into the protruding structure at the bottom of the cover plate 7 to achieve auxiliary fixation of the cover plate 7.

[0036] Specifically, in use, this high-temperature resistant casting workpiece surface heat treatment fixing tool works as follows: the horizontal plate 201 is fixed to the top of the placement frame body 1; the placement plate 202 is made of high-temperature resistant ceramic material and directly supports the workpiece; fixing springs 203 are installed at the four corners of the top of the placement plate 202; the top of the fixing springs 203 is connected to the clamping ball 204; the surface of the clamping ball 204 is provided with three 3mm wide protrusions 4, forming a dual fixing mechanism of "flexible clamping + rigid limiting", which can adapt to workpieces of different shapes or sizes and prevent workpiece displacement due to vibration or thermal expansion during heat treatment. Through the coordinated work of the vertical airflow channel and the heat dissipation fins 301, heat dissipation is accelerated. Meanwhile, the ventilation slot 302 is internally embedded with a removable filter screen 5, which is woven from nickel-based high-temperature alloy wire with a pore size of 1mm, to filter impurities and ensure heat dissipation efficiency. Fixing blocks 6 are set on both sides of the placement rack body 1, and a baffle plate 7 is slidably connected to the bottom. The baffle plate 7 can cover or expose the side space of the placement rack. At the same time, a collection box 8 is set on the inside of the placement rack body 1 to receive oxide layer debris or other residues that fall off during heat treatment. Support plates 9 are set on both sides of the bottom of the placement rack body 1. The support plates 9 are connected by reinforcing rods 10 to form a rigid frame structure. The top slot fits into the bottom of the baffle plate 7 to further enhance the structural stability.

[0037] All technical features in this embodiment can be freely combined according to actual needs.

[0038] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A high-temperature-resistant fixing tool for surface heat treatment of a cast workpiece, comprising a placing rack body (1), characterized in that, The inside of the placing frame body (1) is provided with a placing assembly (2), and one side of the placing frame body (1) is provided with a ventilation assembly (3); The placing assembly (2) comprises a horizontal plate (201), a placing plate (202), a fixing spring (203) and a clamping ball (204), the horizontal plate (201) is arranged on the top of the placing frame body (1), the placing plate (202) is arranged on the top of the horizontal plate (201), four fixing springs (203) are arranged at the top of the four corners of the placing plate (202) respectively, and the clamping ball (204) is arranged on the top of the fixing spring (203); the material of the placing plate (202) is high-temperature-resistant ceramic.

2. The high-temperature-resistant tool for fixing a surface of a cast workpiece for heat treatment according to claim 1, characterized in that, The ventilation assembly (3) comprises heat dissipation fins (301) and a ventilation groove (302), a plurality of heat dissipation fins (301) are arranged on the bottom of the horizontal plate (201), the ventilation groove (302) is arranged on the top of the horizontal plate (201) and penetrates through to the bottom of the horizontal plate (201) at the other end, and the heat dissipation fins (301) are located below the ventilation groove (302).

3. The tool of claim 1, wherein the tool is made of a material having a melting point of at least 1,600 °C. The surface of the clamping ball (204) is provided with three convex stripes (4) for limiting workpieces, the width of the convex stripes (4) is 3mm, and the convex stripes (4) are located above the fixing springs (203).

4. The high-temperature-resistant tool for fixing a surface of a cast workpiece for heat treatment according to claim 2, characterized in that, The inside of the ventilation groove (302) is inlaid with a detachable filter screen (5), the aperture of the detachable filter screen (5) is 1mm, and the detachable filter screen (5) is woven by a nickel-based high-temperature alloy wire.

5. The tool of claim 1, wherein the tool is made of a material having a melting point of at least 1,600 °C. Both sides of the placing frame body (1) are provided with fixing blocks (6), the bottom of the fixing block (6) is slidably connected with a shielding plate (7), and the shielding plate (7) is located on one side of the placing frame body (1).

6. The tool of claim 5, wherein the tool is made of a material having a melting point of at least 1,600 °C. The inside of the placing frame body (1) is provided with a collecting box (8), the collecting box (8) is located below one side of the placing plate (202), and the collecting box (8) is located on one side of the shielding plate (7).

7. The tool of claim 5, wherein the tool is made of a material having a melting point of at least 1,600 °C. Both sides of the bottom of the placing frame body (1) are respectively provided with two support plates (9), a reinforcing rod (10) is arranged between the two support plates (9), both ends of the reinforcing rod (10) penetrate into the inside of the two support plates (9) respectively, and the top of the support plate (9) is clamped with the bottom of the shielding plate (7).

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