A heat treatment apparatus for enhancing the wear resistance of a ductile iron casting

Abstract

The utility model relates to heat treatment equipment technical field especially for a kind of nodular cast iron casting wear resistance enhanced heat treatment equipment, including shaft furnace, drive assembly is installed on the upper end of shaft furnace, the bottom end of drive assembly is fixedly connected with outer support assembly, inner support assembly is embedded and installed in the inner side of outer support assembly, spherical nodular cast iron casting is placed in the upper end of outer support assembly, and outer support assembly includes extension plate, fixedly connected with bifurcation plate in the one side of extension plate, fixedly connected with the first annular seat in the side away from extension plate of bifurcation plate, annular groove is set up in the upper end of first annular seat, inner support assembly includes blocking column, fixedly connected with fixed column plate outside blocking column, fixedly connected with built-in plate in the one side of fixed column plate, fixedly connected with top plate in the top end of built-in plate, in the utility model, device ensures that casting is heated evenly, avoids local heating shortage, improves production efficiency, guarantees performance consistency after heat treatment, satisfies high-precision demand.

Description

Technical Field

[0001] This utility model relates to the technical field of heat treatment equipment, specifically to a heat treatment equipment for enhancing the wear resistance of ductile iron castings. Background Technology

[0002] Heat treatment equipment for enhancing the wear resistance of ductile iron castings mainly includes isothermal quenching furnaces, tempering furnaces, surface quenching equipment, gas soft nitriding furnaces, and annealing furnaces. These devices, through different heat treatment processes such as isothermal quenching, tempering, surface quenching, gas soft nitriding, and annealing, can significantly improve the hardness, toughness, and wear resistance of ductile iron castings, meeting the high performance requirements of castings in different application scenarios. Ductile iron castings, also known as ductile iron castings, are components made of cast iron material with spheroidal graphite as the main microstructure feature. Compared with ordinary gray cast iron, ductile iron castings have higher strength, toughness, wear resistance, and impact resistance. This is mainly due to their internal spheroidal graphite structure, which can effectively reduce the generation and propagation of cracks. Ductile iron castings are widely used in the automotive, machinery manufacturing, and mining machinery industries to manufacture key components such as engine crankshafts, gears, and pump housings. They are highly favored due to their excellent comprehensive performance. When heat treating spherical ductile iron castings, attention must be paid to their placement in the heat treatment equipment. If the spherical castings are not placed properly in the heating furnace, such as if some castings are blocked by other objects, these parts will be underheated. Therefore, a heat treatment equipment to enhance the wear resistance of ductile iron castings is proposed to address the above problem. Utility Model Content

[0003] The purpose of this invention is to provide a heat treatment device for enhancing the wear resistance of ductile iron castings, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A heat treatment device for enhancing the wear resistance of ductile iron castings includes a pit furnace. A drive assembly is installed at the upper end of the pit furnace. An outer support assembly is fixedly connected to the bottom end of the drive assembly. An inner support assembly is embedded inside the outer support assembly. A spherical ductile iron casting is placed on the upper end of the outer support assembly. The outer support assembly includes an extension plate. A bifurcated plate is fixedly connected to one side of the extension plate. A first annular seat is fixedly connected to the side of the bifurcated plate away from the extension plate. An annular groove is formed at the upper end of the first annular seat. The inner support assembly includes a stop post. A fixed post plate is fixedly connected to the outer side of the stop post. An inner plate is fixedly connected to one side of the fixed post plate. A top plate is fixedly connected to the top of the inner plate. A second annular seat is fixedly connected to the side of the fixed post plate away from the inner plate.

[0005] As a further optimization of this utility model, the drive assembly includes a cover plate, a lifting ring fixedly connected to the top of the cover plate, a guide post fixedly connected to the inner side of the lifting ring, the guide post being slidably connected to the inner side of the guide plate, and a drive motor fixedly connected to the top of the guide plate.

[0006] As a further optimization of this utility model, the following features are provided: a connecting shaft is fixedly connected to the end of the drive motor spindle; a sealing hole is provided on the inner side of the cover plate; the connecting shaft is embedded in the sealing hole; and the bottom end of the connecting shaft is fixedly connected to the top end of the top plate.

[0007] As a further optimization of this utility model, the bottom end of the cover plate is fitted to the top end of the well furnace, and the bottom end of the cover plate is fixedly connected to the top end of the extension plate.

[0008] As a further optimization of this utility model, the lower end of the connecting shaft extends into the lower end of the sealing hole, an asbestos gasket is fixedly connected to the inner side of the sealing hole, and the outer side of the connecting shaft is in contact with the inner side of the asbestos gasket inside the sealing hole.

[0009] As a further optimization of this utility model, the first annular seat is annular in shape, and a gap is provided between the plurality of first annular seats.

[0010] As a further optimization of this utility model, the second annular seat has the same shape and structure as the first annular seat, the second annular seat and the first annular seat are aligned vertically, the lower end of the second annular seat is attached to the upper end of the spherical cast iron through an annular groove, and the built-in plate is disposed on the inner side of the first annular seat.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, by setting up a drive assembly, an outer support assembly, and an inner support assembly, the device optimizes the placement and rotation of spherical cast iron castings within the heat treatment equipment, significantly improving the uniformity and quality of heat treatment. This ensures that the castings will not experience insufficient heating due to obstruction by the support structure during the heating process, thereby effectively avoiding performance differences caused by uneven local heating. This design not only improves production efficiency but also ensures the overall performance consistency of the spherical cast iron castings after heat treatment, meeting the needs of high-precision application scenarios. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the drive component structure of this utility model; Figure 3 This is a cross-sectional structural diagram of the drive component of this utility model; Figure 4This is an exploded structural diagram of the drive component of this utility model; Figure 5 This is a schematic diagram of the spherical cast iron part of this utility model; Figure 6 This is a schematic diagram of the external support assembly structure of this utility model; Figure 7 This is a schematic diagram of the internal support assembly structure of this utility model.

[0013] In the diagram: 1. Pit furnace; 2. Drive assembly; 21. Cover plate; 22. Lifting ring; 23. Guide post; 24. Guide plate; 25. Drive motor; 26. Connecting shaft; 27. Sealing hole; 3. External support assembly; 31. Extension plate; 32. Forked plate; 33. First annular seat; 34. Annular groove; 4. Internal support assembly; 41. Stop column; 42. Column fixing plate; 43. Internal plate; 44. Top plate; 45. Second annular seat; 5. Spherical cast iron parts. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-7 This utility model provides a technical solution: A heat treatment device for enhancing the wear resistance of ductile iron castings includes a pit furnace 1. A drive assembly 2 is installed at the upper end of the pit furnace 1. An outer support assembly 3 is fixedly connected to the bottom end of the drive assembly 2. An inner support assembly 4 is embedded in the inner side of the outer support assembly 3. A spherical ductile iron casting 5 is placed on the upper end of the outer support assembly 3. The outer support assembly 3 includes an extension plate 31. A bifurcated plate 32 is fixedly connected to one side of the extension plate 31. A first annular seat 33 is fixedly connected to the side of the bifurcated plate 32 away from the extension plate 31. An annular groove 34 is opened at the upper end of the first annular seat 33. The inner support assembly 4 includes a stop post 41. A fixed post plate 42 is fixedly connected to the outer side of the stop post 41. An inner plate 43 is fixedly connected to one side of the fixed post plate 42. A top plate 44 is fixedly connected to the top of the inner plate 43. A second annular seat 45 is fixedly connected to the side of the fixed post plate 42 away from the inner plate 43.

[0017] As a further implementation of this solution, the drive assembly 2 includes a cover plate 21, a lifting ring 22 fixedly connected to the top of the cover plate 21, a guide post 23 fixedly connected to the inner side of the lifting ring 22, the guide post 23 slidably connected to the inner side of the guide plate 24, and a drive motor 25 fixedly connected to the top of the guide plate 24. Through the above arrangement, the guide plate 24 and the drive motor 25 are limited when they move, and the guide plate 24 is prevented from twisting after the drive motor 25 is started. As a further implementation of this solution, a connecting shaft 26 is fixedly connected to the end of the main shaft of the drive motor 25. A sealing hole 27 is opened on the inner side of the cover plate 21. The connecting shaft 26 is embedded in the sealing hole 27. The bottom end of the connecting shaft 26 is fixedly connected to the top end of the top plate 44. Through the above arrangement, the connection strength of the structure is enhanced, the shear resistance and stability of the device are improved, and at the same time, this structural design can effectively transmit power and ensure the reliability of the device when it is running at high speed. As a further implementation of this scheme, the bottom end of the cover plate 21 is attached to the top end of the pit furnace 1, and the bottom end of the cover plate 21 is fixedly connected to the top end of the extension plate 31. Through the above settings, the overall structural stability of the device is ensured. As a further implementation of this solution, the lower end of the connecting shaft 26 extends to the lower end of the sealing hole 27. An asbestos gasket is fixedly connected to the inner side of the sealing hole 27. The outer side of the connecting shaft 26 is in contact with the inner side of the asbestos gasket inside the sealing hole 27. Through the above arrangement, the asbestos gasket can effectively insulate heat and prevent high temperature from damaging the connection between the connecting shaft 26 and the sealing hole 27. At the same time, it plays a sealing role, preventing heat leakage and improving heat treatment efficiency. As a further implementation of this solution, the first annular seat 33 is annular in shape, and there is a gap between multiple first annular seats 33. The shape and structure of the second annular seat 45 are the same as those of the first annular seat 33. The second annular seat 45 is aligned vertically with the first annular seat 33. The lower end of the second annular seat 45 is attached to the upper end of the spherical cast iron casting 5 through an annular groove 34. The inner plate 43 is set inside the first annular seat 33. Through the above arrangement, it can be ensured that the casting is subjected to uniform force during rotation, and the unevenness of the support structure can be avoided, which can lead to insufficient local heating of the casting, thereby further improving the uniformity and quality of heat treatment.

[0018] Workflow: When feeding spherical ductile iron castings, a rope is installed inside the lifting ring 22 and looped onto the hook of the crane. At this time, the drive assembly 2, outer support assembly 3, and inner support assembly 4 are placed on the ground by the crane. Due to gravity, the extension plate 31 slides on the outside of the stop post 41 through the forked plate 32. The extension plate 31 contacts the ground. The stop post 41 is located inside the second annular seat 45 and has a clearance fit with the second annular seat 45 to prevent the outer support assembly 3 from separating from the inner support assembly 4. At the same time, the support of the stop post 41 maintains a certain gap between the second annular seat 45 and the first annular seat 33, allowing the spherical ductile iron casting 5 to be placed in the annular groove 34. At the upper end, when multiple first annular seats 33 are placed with spherical iron castings 5, it is important to leave a gap between the spherical iron castings 5. After all the spherical iron castings 5 ​​are placed on the upper end of multiple first annular seats 33, the drive assembly 2, outer support assembly 3 and inner support assembly 4 are lifted as a whole by the crane tower. During the lifting process, under the action of gravity, the guide plate 24 and drive motor 25 move downward. The guide plate 24 slides on the outside of the guide column 23, and the connecting shaft 26 slides on the inside of the sealing hole 27. At the same time, the inner support assembly 4 moves downward as a whole until the bottom end of the second annular seat 45 is in contact with the spherical iron castings 5 ​​at the upper end of the first annular seat 33. The outer support assembly 3 and the inner support assembly 4 are aligned with the inside of the pit furnace 1. The cover plate 21 is placed at the upper end of the pit furnace 1. At this time, the outer support assembly 3 and the inner support assembly 4 are in a suspended state, and the drive motor 25 is located on the outside of the pit furnace 1. When performing uniform heat treatment on the spherical cast iron casting 5, the drive motor 25 is started to drive the connecting shaft 26 to rotate. The guide post 23 and the guide plate 24 limit the guide plate 24 to prevent it from twisting. The way the guide post 23 is embedded in the fixed cover plate 21 can improve the shear resistance of the guide post 23. The rotation of the connecting shaft 26 causes the inner support assembly 4 to rotate as a whole. Since the annular groove 34 at the lower end of the second annular seat 45 and the annular groove 34 at the upper end of the first annular seat 33 are both in contact with the spherical cast iron casting 5, the spherical cast iron casting 5 is rotated by the friction between the second annular seat 45 and the first annular seat 33 and the spherical cast iron casting 5. The stop post 41 rotates inside the first annular seat 33 to prevent the second annular seat 45 from rotating excessively and causing the second annular seat 45 to become misaligned. This avoids the problem of insufficient heating of some castings due to being blocked by the support structure, thereby improving the uniformity and quality of heat treatment of the spherical cast iron casting 5.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat treatment device for enhancing the wear resistance of ductile iron castings, comprising a pit furnace (1), characterized in that: The pit furnace (1) is equipped with a drive assembly (2) at the upper end, and an outer support assembly (3) is fixedly connected to the bottom end of the drive assembly (2). An inner support assembly (4) is embedded in the inner side of the outer support assembly (3), and a spherical cast iron piece (5) is placed on the upper end of the outer support assembly (3). The external support assembly (3) includes an extension plate (31), a forked plate (32) is fixedly connected to one side of the extension plate (31), and a first annular seat (33) is fixedly connected to the side of the forked plate (32) away from the extension plate (31). An annular groove (34) is provided at the upper end of the first annular seat (33). The inner support assembly (4) includes a stop post (41), a fixed plate (42) is fixedly connected to the outside of the stop post (41), an inner plate (43) is fixedly connected to one side of the fixed plate (42), a top plate (44) is fixedly connected to the top of the inner plate (43), and a second annular seat (45) is fixedly connected to the side of the fixed plate (42) away from the inner plate (43).

2. The heat treatment equipment for enhancing the wear resistance of ductile iron castings according to claim 1, characterized in that: The drive assembly (2) includes a cover plate (21), a lifting ring (22) is fixedly connected to the top of the cover plate (21), a guide post (23) is fixedly connected to the inner side of the lifting ring (22), the guide post (23) is slidably connected to the inner side of the guide plate (24), and a drive motor (25) is fixedly connected to the top of the guide plate (24).

3. The heat treatment equipment for enhancing the wear resistance of ductile iron castings according to claim 2, characterized in that: The drive motor (25) has a connecting shaft (26) fixedly connected to the end of its main shaft. The cover plate (21) has a sealing hole (27) on its inner side. The connecting shaft (26) is embedded in the sealing hole (27). The bottom end of the connecting shaft (26) is fixedly connected to the top end of the top plate (44).

4. The heat treatment equipment for enhancing the wear resistance of ductile iron castings according to claim 2, characterized in that: The bottom end of the cover plate (21) is attached to the top end of the pit furnace (1), and the bottom end of the cover plate (21) is fixedly connected to the top end of the extension plate (31).

5. The heat treatment equipment for enhancing the wear resistance of ductile iron castings according to claim 3, characterized in that: The lower end of the connecting shaft (26) extends to the lower end of the sealing hole (27). An asbestos gasket is fixedly connected to the inner side of the sealing hole (27). The outer side of the connecting shaft (26) is in contact with the inner side of the asbestos gasket inside the sealing hole (27).

6. The heat treatment equipment for enhancing the wear resistance of ductile iron castings according to claim 1, characterized in that: The first annular seat (33) is annular in shape, and there is a gap between the multiple first annular seats (33).

7. The heat treatment equipment for enhancing the wear resistance of ductile iron castings according to claim 1, characterized in that: The shape and structure of the second annular seat (45) are the same as those of the first annular seat (33). The second annular seat (45) and the first annular seat (33) are aligned vertically. The lower end of the second annular seat (45) is attached to the upper end of the spherical cast iron piece (5) through an annular groove (34). The inner plate (43) is located on the inner side of the first annular seat (33).

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