Local heat treatment device for metal castings of different sizes
By setting an adjustable support structure and a carbon removal plate device inside the furnace, the problem of uneven heating in local heat treatment of metal castings was solved, achieving uniformity and adaptability of heat treatment, and improving the overall quality of metal castings and the success rate of heat treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU HUIAN PRECISION MACHINERY CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-19
AI Technical Summary
When using a box-type resistance furnace to perform local heat treatment on metal castings, the bottom of the metal casting is in close contact with the bottom of the furnace, resulting in uneven heating. This may cause asynchronous microstructural transformation and unbalanced stress distribution, leading to quality problems or even the scrapping of the casting, and increasing the cost of heat treatment.
A local heat treatment device adapted to metal castings of different sizes was designed. By setting an adjustable support structure (such as a first placement rod and a second placement rod) inside the furnace, the bottom of the metal casting is prevented from being in close contact with the bottom of the furnace. Carbon deposits in the through groove are cleaned by a carbon cleaning plate, ensuring uniform heat treatment.
It achieves uniform heating of metal castings during heat treatment, improves heat treatment quality and success rate, reduces the probability of damage caused by uneven heating, and can adapt to the heat treatment needs of metal castings of different sizes.
Smart Images
Figure CN224378098U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of metal casting processing technology, specifically relating to a local heat treatment device for metal castings of different sizes. Background Technology
[0002] Heat treatment of metal castings is a key process that uses heating, holding, and cooling techniques to change the internal structure of the castings, thereby improving their mechanical properties, eliminating internal stress, or improving their machinability. Since some metal castings are not integrally formed according to design requirements, heat treatment is performed on local components of the metal castings. Furthermore, box-type resistance furnaces are used for heat treatment of small and medium-sized castings.
[0003] When performing localized heat treatment on metal castings using a box-type resistance furnace, the metal castings are generally placed directly at the bottom of the furnace. Since the heating elements of the box-type resistance furnace are usually located on both sides of the furnace chamber, the metal elements placed on the bottom wall of the furnace chamber are in close contact with the bottom of the furnace chamber. This may cause uneven heating of the bottom of the metal elements compared to the other sides of the metal casting. In severe cases, this may lead to asynchronous microstructural transformation and unbalanced stress distribution, resulting in a series of quality problems, or even scrapping the casting, wasting raw materials, and increasing the cost of heat treatment. Utility Model Content
[0004] The purpose of this invention is to provide a local heat treatment device for metal castings of different sizes, which can make the metal castings heat more evenly during heat treatment, avoid quality problems caused by uneven heating, and improve the quality of heat treatment.
[0005] The specific technical solution adopted in this utility model is as follows:
[0006] A local heat treatment device for metal castings of different sizes includes a furnace body with a furnace chamber inside. An installation plate is fixedly installed at the middle position of the bottom of the furnace chamber. A first connecting rod is fixedly installed on the top of the installation plate. First placement rods are symmetrically arranged on the front and back of the outer wall of the first connecting rod near the top. Second placement rods are symmetrically arranged on both sides of the outer wall of the first connecting rod near the top. The tops of the first placement rods and the second placement rods are both higher than the top of the first connecting rod.
[0007] In a preferred embodiment, a connecting sleeve is fixedly installed on the outer wall of the first connecting rod near the top. A first placement rod is symmetrically fixed on the front and back of the connecting sleeve. The first placement rod is symmetrically fixed on the front and back of the outer wall of the first connecting rod near the top via the connecting sleeve.
[0008] In a preferred embodiment, a rotating sleeve is provided at a position on the outer wall of the first connecting rod below the connecting sleeve for damping rotation. Second placement rods are symmetrically fixed on both sides of the rotating sleeve, and the second placement rods are positioned near the top on both sides of the outer wall of the first connecting rod through the rotating sleeve.
[0009] In a preferred embodiment, a second connecting rod is fixedly provided on both sides of the rotating sleeve, and the second placement rod is fixedly connected to both sides of the rotating sleeve through the second connecting rod, and the height of the second placement rod is the same as the height of the first placement rod.
[0010] In a preferred embodiment, both the second placement rod and the first carbon removal plate have through slots extending through their interiors.
[0011] In a preferred embodiment, a sliding sleeve is provided on the outer wall of the first connecting rod at a position below the rotating sleeve, which can slide up and down on the outer wall of the first connecting rod. A first carbon cleaning plate is fixedly provided on the outer side of the sliding sleeve at a position corresponding to the first placement rod. The position of the first carbon cleaning plate corresponds to the position of the through groove on the first placement rod and is adapted to the through groove.
[0012] In a preferred embodiment, the outer wall of the first connecting rod is damped and rotatably connected to a movable connecting sleeve that can slide up and down below the sliding sleeve. A second carbon cleaning plate is fixedly provided on the outer side of the movable connecting sleeve at a position corresponding to the through groove on the second placement rod, and the second carbon cleaning plate is adapted to the through groove at that position.
[0013] In a preferred embodiment, a plug rod is fixedly provided on the top of the second carbon removal sheet, and the top of the plug rod extends into the interior of the through groove on the second placement rod.
[0014] In a preferred embodiment, a limiting post is fixedly provided on the outer wall of the first connecting rod below the movable connecting sleeve, and the outer diameter of the limiting post is larger than the outer diameter of the movable connecting sleeve.
[0015] The technical effects achieved by this utility model are as follows:
[0016] This utility model supports the metal casting using a first and a second placement rod, preventing the bottom of the metal casting from coming into close contact with the bottom of the furnace during heat treatment. This avoids uneven heating of the bottom of the metal casting caused by the aforementioned situation, resulting in more uniform heating of the metal casting during heat treatment. This improves the effect and quality of heat treatment, thereby enhancing the overall quality of the metal casting, reducing the probability of gradual damage due to heat treatment, and increasing the success rate of heat treatment.
[0017] This utility model can change the included angle between the second placement rod and the first placement rod, so that metal castings of different sizes can be placed on the first placement rod and the rotating sleeve, thereby enabling the heat treatment device to adapt to the heat treatment of metals of different sizes.
[0018] The second carbon cleaning plate gradually enters the interior of the through groove along with the first carbon cleaning plate. As the second carbon cleaning plate enters and passes through the through groove, it cleans the carbon deposits on the inner wall of the through groove through the side walls of the first and second carbon cleaning plates, preventing the through groove from being blocked by carbon deposits and keeping the through groove unobstructed. This allows the bottom of the metal casting to be heated more evenly during heat treatment, thus improving the heat treatment effect. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this practical application;
[0020] Figure 2 This is a schematic diagram of the internal structure of the practical furnace chamber;
[0021] Figure 3 This is a schematic diagram of the connection structure between the mounting plate and the first connecting rod.
[0022] Figure 4 This is a schematic diagram of the connection structure between the first connecting rod and the second placement rod;
[0023] Figure 5 This is a schematic diagram of the connection structure between the first connecting rod and the connecting sleeve in this utility model;
[0024] Figure 6 This is a practical book Figure 3 Enlarged view of point A in the middle;
[0025] Figure 7 This is a practical book Figure 5 Enlarged view of point B in the middle.
[0026] The attached diagram lists the components represented by each number as follows:
[0027] 1. Furnace body;
[0028] 2. Furnace chamber;
[0029] 3. Mounting plate;
[0030] 4. First connecting rod;
[0031] 5. Connecting sleeve;
[0032] 6. First placement rod; 7. Through groove; 8. Second connecting rod; 9. Second placement rod; 10. Rotating sleeve; 11. Sliding sleeve; 12. First carbon cleaning plate; 13. Movable connecting sleeve; 14. Second carbon cleaning plate; 15. Limiting post; 16. Insertion rod. Detailed Implementation
[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0034] Many specific details are set forth in the following description in order to provide a full understanding of this utility model. However, this utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0035] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this utility model. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.
[0036] Secondly, this utility model is described in detail with reference to the schematic diagrams. When detailing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.
[0037] Please see the appendix Figures 1 to 7 As shown, this utility model provides a local heat treatment device for metal castings of different sizes, including a furnace body 1, a furnace chamber 2 inside the furnace body 1, an installation plate 3 fixedly installed at the middle position of the bottom inside the furnace chamber 2, a first connecting rod 4 fixedly installed on the top of the installation plate 3, a first placement rod 6 symmetrically arranged on the front and back of the outer wall of the first connecting rod 4 near the top, and a second placement rod 9 symmetrically arranged on both sides of the outer wall of the first connecting rod 4 near the top, the tops of the first placement rod 6 and the second placement rod 9 are both higher than the top of the first connecting rod 4.
[0038] According to the above structure, when performing heat treatment on a local metal casting, the metal casting can be placed on the first placement rod 6 and the second placement rod 9. After the metal casting is placed, the furnace body 1 can be closed to perform heat treatment on the metal casting inside the furnace chamber 2. Since the metal casting is supported by the first placement rod 6 and the second placement rod 9, the bottom of the metal casting is prevented from being in close contact with the bottom of the furnace chamber 2 during the heat treatment process. This avoids uneven heating of the bottom of the metal casting caused by the above situation, so that the metal casting is heated more evenly during the heat treatment process, thereby improving the effect and quality of heat treatment, improving the overall quality of the metal casting, reducing the probability of gradual damage due to heat treatment, and increasing the success rate of heat treatment.
[0039] In a preferred embodiment, please refer to Figure 4 and Figure 5 A connecting sleeve 5 is fixedly installed on the outer wall of the first connecting rod 4 near the top. A first placement rod 6 is symmetrically fixed on the front and back of the connecting sleeve 5. The first placement rod 6 is symmetrically fixed on the outer wall of the first connecting rod 4 near the top of the front and back through the connecting sleeve 5.
[0040] In this embodiment, the first placement rod 6 can be fixedly installed at a certain position to prevent the first placement rod 6 from moving.
[0041] Secondly, please refer to it again. Figure 3 and Figure 6 A rotating sleeve 10 is provided at a position on the outer wall of the first connecting rod 4 below the connecting sleeve 5 for damping rotation. A second placement rod 9 is symmetrically fixed on both sides of the rotating sleeve 10. The second placement rod 9 is located on both sides of the outer wall of the first connecting rod 4 near the top through the rotating sleeve 10. A second connecting rod 8 is fixed on both sides of the rotating sleeve 10. The second placement rod 9 is fixedly connected to both sides of the rotating sleeve 10 through the second connecting rod 8, and the height of the second placement rod 9 is the same as the height of the first placement rod 6.
[0042] In the above structure, when it is necessary to place metal castings of different sizes, the position of the second placement rod 9 can be adjusted according to the size of the metal casting to be placed. During adjustment, one of the second placement rods 9 is pushed, and the second placement rod 9 drives the rotating sleeve 10 to rotate through the second connecting rod 8 connected to it. The rotating sleeve 10 drives the other second connecting rod 8 and the second placement rod 9 to rotate, thereby changing the included angle between the second placement rod 9 and the first placement rod 6. Thus, metal castings of different sizes can be placed on the first placement rod 6 and the rotating sleeve 10, so that the heat treatment device can adapt to the heat treatment of metals of different sizes.
[0043] In a preferred embodiment, please refer to Figure 5 and Figure 6 Both the second placement rod 9 and the first carbon removal plate 12 have through grooves 7 that penetrate their interiors.
[0044] In this embodiment, when the metal casting is heat-treated, the hot air inside the furnace 2 can pass through the inside of the through groove 7 and come into contact with the bottom of the metal casting placed on the first placement rod 6 and the second placement rod 9, so that the bottom of the metal casting is heated more evenly, thereby further improving the effect of heat treatment of the metal casting.
[0045] Secondly, please refer to it again. Figure 3 and Figure 6A sliding sleeve 11 is provided on the outer wall of the first connecting rod 4 at a position below the rotating sleeve 10, which can slide up and down on the outer wall of the first connecting rod 4. A first carbon cleaning plate 12 is fixedly provided on the outer side of the sliding sleeve 11 at a position corresponding to the first placement rod 6. The position of the first carbon cleaning plate 12 corresponds to the position of the through groove 7 on the first placement rod 6 and is adapted to the through groove 7.
[0046] In the above structure, when there is carbon buildup inside the through groove 7 on the first placement rod 6, the sliding sleeve 11 can be pushed upward. The sliding sleeve 11 drives the first carbon cleaning plate 12 to gradually enter the through groove 7 on the first placement rod 6. Thus, the carbon buildup inside the through groove 7 is cleaned by the process of the first carbon cleaning plate 12 entering and passing through the side wall of the through groove 7, ensuring the unobstructed flow inside the through groove 7 and preventing the through groove 7 from being blocked by carbon buildup.
[0047] Secondly, please refer to the following as well. Figure 3 and Figure 6 The outer wall of the first connecting rod 4 is located below the sliding sleeve 11 and is connected to a movable connecting sleeve 13 that can slide up and down. A second carbon cleaning plate 14 is fixedly installed on the outer side of the movable connecting sleeve 13 at a position corresponding to the position of the through groove 7 on the second placement rod 9, and the second carbon cleaning plate 14 is compatible with the through groove 7 at that position.
[0048] In this embodiment, when there is carbon buildup inside the through groove 7, the second carbon cleaning plate 14 can be pushed upward. The second carbon cleaning plate 14 drives the movable connecting sleeve 13 to slide upward. During the upward sliding of the movable connecting sleeve 13, the movable connecting sleeve 13 pushes the sliding sleeve 11 to slide upward at the same time. Thus, the second carbon cleaning plate 14 and the first carbon cleaning plate 12 simultaneously enter and pass through the interior of the corresponding through groove 7. In this way, the carbon buildup inside multiple through grooves 7 can be cleaned simultaneously through the cooperation of the first carbon cleaning plate 12 and the second carbon cleaning plate 14, thereby improving the carbon buildup cleaning efficiency.
[0049] Secondly, please refer to the following as well. Figure 6 and Figure 7 A plug rod 16 is fixedly provided on the top of the second carbon cleaning sheet 14, and the top of the plug rod 16 extends into the inside of the through groove 7 on the second placement rod 9.
[0050] According to the above structure, when the second placement rod 9 rotates, since the insertion rod 16 is inserted into the through groove 7 on the second placement rod 9, during the rotation of the second placement rod 9, the through groove 7 and the insertion rod 16 cooperate with each other to make the second carbon cleaning plate 14 rotate synchronously with the second placement rod 9. Thus, during the rotation of the second placement rod 9, the position of the second carbon cleaning plate 14 and the through groove 7 on the second placement rod 9 always correspond, which facilitates the second carbon cleaning plate 14 to clean the carbon deposits inside the through groove 7.
[0051] Secondly, please refer to the following as well. Figure 6A limiting post 15 is fixedly installed on the outer wall of the first connecting rod 4 below the movable connecting sleeve 13. The outer diameter of the limiting post 15 is larger than the outer diameter of the movable connecting sleeve 13.
[0052] According to the above structure, after the carbon deposits on the through groove 7 are cleaned, the second carbon cleaning plate 14 can be loosened. Due to gravity, the second carbon cleaning plate 14 and the components connected to it fall back to the initial position. During the fall of the movable connecting sleeve 13, the movable connecting sleeve 13 is limited by the limiting post 15.
[0053] The working principle of this utility model is as follows: when it is necessary to heat treat a local part of a metal casting, the furnace body 1 can be opened, and the local part can be placed on the first placement rod 6 and the second placement rod 9. The furnace body 1 is then closed to heat treat the metal casting placed inside the furnace chamber 2. During the heat treatment process, the support of the first placement rod 6 and the second placement rod 9 ensures that the bottom of the furnace chamber 2 does not need to be in close contact with the bottom of the metal casting, thereby making the metal casting heat more evenly.
[0054] During the placement of metal castings, the second placement rod 9 can be rotated and adjusted according to the different sizes of the metal castings. When adjusting, one of the second placement rods 9 is pushed, so that the second placement rod 9 drives the rotating sleeve 10 to rotate through the second connecting rod 8 connected to it. This causes the rotating sleeve 10 to drive the other second connecting rod 8 and the second placement rod 9 to rotate simultaneously, thereby changing the included angle between the second placement rod 9 and the first placement rod 6. This allows the first placement rod 6 and the second placement rod 9 to support and place metal castings of different sizes.
[0055] After the heat treatment device has been used for a period of time, there may be some carbon deposits on the inner wall of the through groove 7. After a period of time, the through groove 7 may become blocked to a certain extent. At this time, the two second carbon cleaning plates 14 can be pushed upward. The second carbon cleaning plates 14 push the sliding sleeve 11 to slide upward on the outer wall of the first connecting rod 4 through the movable connecting sleeve 13. During the sliding process of the sliding sleeve 11, the sliding sleeve 11 drives the first carbon cleaning plate 12 to move synchronously with the second carbon cleaning plate 14. When the second carbon cleaning plate 14 and the first carbon cleaning plate 12 move upward a certain distance, the second carbon cleaning plate 14 and the first carbon cleaning plate 12 gradually enter the interior of the through groove 7. At the same time, during the process of the second carbon cleaning plate 14 entering and passing through the through groove 7, the carbon deposits on the inner wall of the through groove 7 are cleaned through the side walls of the first carbon cleaning plate 12 and the second carbon cleaning plate 14 to prevent the through groove 7 from being blocked by carbon deposits.
[0056] After cleaning the carbon deposits inside the through groove 7, the second carbon cleaning plate 14 is released, and due to the force of gravity, the aforementioned upward-moving components fall back to their initial positions.
[0057] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model shall be implemented according to conventional methods in the art unless otherwise specified or limited.
Claims
1. A device for local heat treatment of metal castings of different sizes, characterized in that: The furnace includes a furnace body (1), and a furnace chamber (2) is provided inside the furnace body (1). An installation plate (3) is fixedly installed at the middle position of the bottom of the furnace chamber (2). A first connecting rod (4) is fixedly installed on the top of the installation plate (3). A first placement rod (6) is symmetrically arranged on the front and back of the outer wall of the first connecting rod (4) near the top. A second placement rod (9) is symmetrically arranged on both sides of the outer wall of the first connecting rod (4) near the top. The tops of the first placement rod (6) and the second placement rod (9) are both higher than the top of the first connecting rod (4).
2. The local heat treatment device for metal castings of different sizes according to claim 1, characterized in that: A connecting sleeve (5) is fixedly installed on the outer wall of the first connecting rod (4) near the top. A first placement rod (6) is symmetrically fixed on the front and back of the connecting sleeve (5). The first placement rod (6) is symmetrically fixed on the front and back of the outer wall of the first connecting rod (4) near the top through the connecting sleeve (5).
3. The local heat treatment device for metal castings of different sizes according to claim 1, characterized in that: A rotating sleeve (10) is provided at a position on the outer wall of the first connecting rod (4) below the connecting sleeve (5) for damping rotation. A second placement rod (9) is symmetrically fixed on both sides of the rotating sleeve (10). The second placement rod (9) is located on both sides of the outer wall of the first connecting rod (4) near the top through the rotating sleeve (10).
4. The local heat treatment device for metal castings of different sizes according to claim 3, characterized in that: The rotating sleeve (10) is fixedly provided with a second connecting rod (8) on both sides. The second placement rod (9) is fixedly connected to both sides of the rotating sleeve (10) through the second connecting rod (8), and the height of the second placement rod (9) is the same as the height of the first placement rod (6).
5. The local heat treatment device for metal castings of different sizes according to claim 1, characterized in that: Both the second placement rod (9) and the first carbon removal plate (12) have through slots (7) that penetrate their interiors.
6. The local heat treatment device for metal castings of different sizes according to claim 1, characterized in that: A sliding sleeve (11) is provided on the outer wall of the first connecting rod (4) at a position below the rotating sleeve (10), which can slide up and down on the outer wall of the first connecting rod (4). A first carbon cleaning plate (12) is fixedly provided on the outer side of the sliding sleeve (11) at a position corresponding to the first placement rod (6). The position of the first carbon cleaning plate (12) corresponds to the position of the through groove (7) on the first placement rod (6) and is adapted to the through groove (7).
7. A local heat treatment device for metal castings of different sizes according to claim 6, characterized in that: The outer wall of the first connecting rod (4) is connected to a movable connecting sleeve (13) that can slide up and down, located below the sliding sleeve (11). A second carbon cleaning plate (14) is fixedly installed on the outer side of the movable connecting sleeve (13) at a position corresponding to the position of the through groove (7) on the second placement rod (9), and the second carbon cleaning plate (14) is compatible with the through groove (7) at that position.
8. A local heat treatment device for metal castings of different sizes according to claim 7, characterized in that: The top of the second carbon removal plate (14) is fixedly provided with a plug rod (16), the top of which extends into the inside of the through groove (7) on the second placement rod (9).
9. A local heat treatment device for metal castings of different sizes according to claim 7, characterized in that: A limiting post (15) is fixedly installed on the outer wall of the first connecting rod (4) below the movable connecting sleeve (13), and the outer diameter of the limiting post (15) is larger than the outer diameter of the movable connecting sleeve (13).