Heat treatment furnace with uniform furnace temperature for automobile mold casting

Abstract

The utility model belongs to the technical field of heat treatment furnaces, and particularly relates to a heat treatment furnace with uniform furnace temperature for an automobile mold casting, which comprises a furnace body, the furnace body is provided with an opening and closing sealing door, the inner bottom of the furnace body is provided with a bottom guide seat, the inner side wall of the furnace body is provided with a heating cavity, and the surface of the heating cavity is provided with a plurality of groups of air outlets; the heat exchanger has the advantages that the conical protrusions can disturb air flow on the surface of the carrying plate, so that a more complex air flow path is formed when hot air flows through the carrying plate and a casting, disturbance of the air flow is improved, the hot air can be promoted to better circulate around the casting, and heat exchange efficiency is improved. And the furnace temperature uniformity is greatly improved, it is ensured that all parts of the casting are heated consistently, local overheating or supercooling is avoided, the organization structure and performance of the casting are effectively improved, the rejection rate is reduced, the product quality is improved, and the service life of the product is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of heat treatment furnace technology, specifically relating to a heat treatment furnace for automotive mold castings with uniform furnace temperature. Background Technology

[0002] In the production process of automotive mold castings, heat treatment is a key process. Its purpose is to improve the microstructure and properties of the castings by heating, holding and cooling them to meet the requirements of automotive molds.

[0003] However, existing heat treatment furnaces for automotive mold castings often suffer from uneven furnace temperature during actual use. In areas with excessively high furnace temperatures, the castings may overheat, leading to a decrease in strength and toughness. In areas with excessively low furnace temperatures, the castings may not fully austenitize, affecting the subsequent cooling transformation process and resulting in insufficient hardness and wear resistance. Uneven furnace temperature causes inconsistent heating of automotive mold castings during heat treatment, resulting in differences in the microstructure and properties of the castings, thus affecting their quality and service life.

[0004] To address the aforementioned issues, this application proposes a heat treatment furnace for automotive mold castings with uniform furnace temperature. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a heat treatment furnace for automotive mold castings with uniform furnace temperature. The conical protrusion disrupts the airflow on the surface of the carrier plate, creating a more complex airflow path as hot air flows over the carrier plate and the casting. This increases airflow turbulence, promotes better circulation of hot air around the casting, and improves heat exchange efficiency. Multiple air outlets, combined with guide plates tilted in opposite directions, further guide the airflow to a uniform distribution, comprehensively enveloping the casting and significantly improving furnace temperature uniformity. This ensures consistent heating of all parts of the casting, avoids localized overheating or undercooling, effectively improves the microstructure and properties of the casting, reduces scrap rate, and enhances product quality and service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat treatment furnace for automotive mold castings with uniform furnace temperature, comprising a furnace body, the furnace body being provided with an openable and sealed door, and a bottom guide seat being provided at the inner bottom of the furnace body;

[0007] The inner wall of the furnace body is equipped with a heating chamber, and the surface of the heating chamber has multiple sets of air outlets. A circulating fan is installed on the top of the furnace body. The air outlet of the circulating fan is connected to the bottom of the heating chamber through an air inlet pipe, and the air inlet of the circulating fan is connected to the top of the heating chamber through an exhaust pipe.

[0008] As a preferred embodiment of the heat treatment furnace for automotive mold castings with uniform furnace temperature according to this utility model, a guide plate is provided at the air outlet. The guide plate is located inside the heating chamber, and the inclination directions of two adjacent guide plates are opposite.

[0009] As a preferred embodiment of the heat treatment furnace for automotive mold castings with uniform furnace temperature according to this utility model, a movable seat is provided on the surface of the bottom guide seat, a carrying plate is provided on the surface of the movable seat, a transmission rod is rotatably connected to the surface of the movable seat, one end of the transmission rod is connected to the carrying plate, and a worm gear is installed at the other end of the transmission rod. The transmission rod is slidably connected in a strip groove one opened on the surface of the bottom guide seat. A rotating frame is symmetrically installed on the bottom surface of the movable seat, and a worm is rotatably connected between the two rotating frames. The worm gear meshes with the worm. A servo motor is installed on one side of one of the rotating frames, and one end of the worm is connected to the output shaft end of the servo motor. The rotating frame is slidably connected in a strip groove two opened on the surface of the bottom guide seat.

[0010] As a preferred embodiment of the heat treatment furnace for automotive mold castings with uniform furnace temperature according to this utility model, a connecting frame is slidably connected inside the strip groove. The connecting frame is connected to the movable seat. A guide block is installed at the bottom of the connecting frame. An electric guide rail is installed inside the bottom guide seat. The guide block is slidably connected to the surface of the electric guide rail.

[0011] As a preferred embodiment of the heat treatment furnace for automotive mold castings with uniform furnace temperature according to this utility model, multiple conical protrusions are evenly distributed on the surface of the carrier plate.

[0012] As a preferred embodiment of the heat treatment furnace for automotive mold castings with uniform furnace temperature according to this utility model, the bottom of the movable seat is equipped with multiple pulleys, and the movable seat is slidably connected to the surface of the bottom guide seat through the pulleys.

[0013] As a preferred embodiment of the heat treatment furnace for automotive mold castings with uniform furnace temperature according to this utility model, the bottom of the carrying plate is integrally formed with an annular guide frame, and the surface of the movable seat is provided with an annular groove adapted to the annular guide frame. The carrying plate is rotatably connected to the surface of the movable seat through the annular guide frame and the annular groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a combination of structures including a furnace body, bottom guide seat, circulating fan, movable seat, carrying plate, conical protrusion, heating chamber, guide plate, rotating frame, and annular guide frame. The circulating fan is connected to the heating chamber via an inlet pipe and an exhaust pipe, forcing the hot air inside the furnace to circulate. Hot air is extracted from the top of the heating chamber and then introduced from the bottom, ensuring full contact between all areas of the furnace and the hot air. This further enhances the uniformity of furnace temperature. Compared to traditional heat treatment furnaces, this significantly improves temperature uniformity, ensuring uniform heating of automotive mold castings during heat treatment. It effectively improves the microstructure and properties of the castings, enhancing key indicators such as strength, toughness, hardness, and wear resistance, reducing scrap rates, and improving product quality and service life.

[0016] Multiple air outlets, combined with guide plates tilted in opposite directions, further guide the airflow to distribute evenly, fully enveloping the casting, significantly improving furnace temperature uniformity, ensuring consistent heating of all parts of the casting, avoiding local overheating or undercooling, effectively improving the microstructure and properties of the casting, reducing scrap rate, and improving product quality and service life. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 In this utility model Figure 1 A schematic diagram of the side view structure;

[0020] Figure 3 This is a schematic diagram of the structure of the conical protrusion, the carrying plate, and the movable seat in this utility model;

[0021] Figure 4 This is a schematic diagram of the annular guide frame and pulley in this utility model;

[0022] Figure 5 This is a schematic diagram of the heating chamber, air outlet, and guide plate in this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the rotating frame, guide block, and connecting frame in this utility model;

[0024] In the picture:

[0025] 1. Furnace body; 2. Opening and sealing door; 3. Bottom guide seat; 4. Circulating fan; 5. Exhaust pipe; 6. Inlet pipe; 7. Moving seat; 8. Carrier plate; 9. Conical protrusion; 10. Annular groove; 11. Pulley; 12. Heating chamber; 13. Air outlet; 14. Guide plate; 15. Electric guide rail; 16. Guide block; 17. Connecting frame; 18. Servo motor; 19. Worm gear; 20. Worm wheel; 21. Transmission rod; 22. Rotating frame; 23. Strip groove one; 24. Strip groove two; 25. Annular guide frame. Detailed Implementation

[0026] 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.

[0027] Example

[0028] like Figures 1-6 As shown;

[0029] A heat treatment furnace for automotive mold castings with uniform furnace temperature includes a furnace body 1, a sealing door 2 for opening and closing, and a bottom guide seat 3 at the inner bottom of the furnace body 1.

[0030] A heating chamber 12 is installed on the inner wall of the furnace body 1. Multiple sets of air outlets 13 are opened on the surface of the heating chamber 12. A circulating fan 4 is installed on the top of the furnace body 1. The air outlet of the circulating fan 4 is connected to the bottom of the heating chamber 12 through the air inlet pipe 6. The air inlet of the circulating fan 4 is connected to the top of the heating chamber 12 through the exhaust pipe 5.

[0031] The circulating fan 4 is connected to the bottom and top of the heating chamber 12 through the air inlet pipe 6 and the air extraction pipe 5, respectively, which enables the hot air flow in the heating chamber 12 to circulate. The hot air enters from the bottom of the heating chamber 12, is extracted from the top, and is then sent back in from the bottom. This cycle repeats, which can avoid local overheating or underheating and ensure that all parts of the furnace are heated relatively evenly. This ensures that the temperature of all parts of the automotive mold casting is consistent during the heat treatment process, thereby improving the heat treatment quality. Multiple sets of air outlets 13 are distributed on the surface of the heating chamber 12, which allows the hot air flow to enter the furnace body 1 from different positions and directions, so as to heat the automotive mold casting in all directions, further eliminating temperature dead zones and ensuring the uniformity of furnace temperature.

[0032] A guide plate 14 is provided at the air outlet 13. The guide plate 14 is located inside the heating chamber 12, and the inclination directions of two adjacent guide plates 14 are opposite.

[0033] Adjacent guide plates 14 are inclined in opposite directions, guiding the hot airflow from the outlet 13 outwards in different directions and angles. This prevents the airflow from concentrating in one direction, promoting a more uniform distribution of the hot airflow within the furnace. This ensures that the automotive mold castings in different locations within the furnace are exposed to a uniform flow of hot air, improving furnace temperature uniformity. The guide plates 14 also alter the airflow direction, creating complex flow paths that increase the contact area and time between the airflow, the furnace air, and the mold castings. This results in more thorough heat exchange between the hot airflow and the mold castings, leading to more efficient heat transfer and more uniform heating of all parts of the mold castings. This improves the heat treatment effect and ensures the quality and performance stability of the castings.

[0034] A movable seat 7 is provided on the surface of the bottom guide seat 3, and a carrying plate 8 is provided on the surface of the movable seat 7. A transmission rod 21 is rotatably connected to the surface of the movable seat 7. One end of the transmission rod 21 is connected to the carrying plate 8, and a worm gear 20 is installed at the other end of the transmission rod 21. The transmission rod 21 is slidably connected in a slot 23 on the surface of the bottom guide seat 3. A rotating frame 22 is symmetrically installed on the bottom surface of the movable seat 7. A worm gear 19 is rotatably connected between the two rotating frames 22. The worm gear 20 meshes with the worm gear 19. A servo motor 18 is installed on one side of one of the rotating frames 22. One end of the worm gear 19 is connected to the output shaft end of the servo motor 18. The rotating frame 22 is slidably connected in a slot 24 on the surface of the bottom guide seat 3.

[0035] The servo motor 18 can be activated as needed to drive the worm gear 19 to rotate, causing the carrier plate 8 to rotate around the transmission rod 21, so that all parts of the casting are fully heated.

[0036] A connecting frame 17 is slidably connected inside the strip groove 23. The connecting frame 17 is connected to the movable seat 7. A guide block 16 is installed at the bottom of the connecting frame 17. An electric guide rail 15 is installed inside the bottom guide seat 3. The guide block 16 is slidably connected to the surface of the electric guide rail 15.

[0037] The position of the moving seat 7 can be adjusted by the electric guide rail 15 as needed to change the heating area of ​​the casting in the furnace. Through the precise control of the electric guide rail 15 and the guiding effect of the strip groove 23, the moving seat 7 can accurately reach the preset position each time it moves. Whether in the heat treatment process of different batches of automotive mold castings or when the same casting is subjected to multiple different treatment steps, the position of the moving seat 7 can be kept consistent, thereby improving the stability of the heat treatment process and the reliability of product quality.

[0038] Multiple conical protrusions 9 are evenly distributed on the surface of the carrier plate 8.

[0039] The conical protrusion 9 can disrupt the airflow on the surface of the carrier plate 8, making the hot air form a more complex airflow path when flowing through the carrier plate 8 and the casting, increasing the turbulence of the airflow, which can promote better circulation of hot air around the casting, improve heat exchange efficiency, and make all parts of the casting more evenly heated, which helps to improve the quality of heat treatment and reduce the occurrence of local overheating or undercooling of the casting.

[0040] Multiple pulleys 11 are installed at the bottom of the movable seat 7, and the movable seat 7 is slidably connected to the surface of the bottom guide seat 3 via the pulleys 11.

[0041] The rolling friction of the pulley 11 replaces the sliding friction between the movable seat 7 and the bottom guide seat 3, greatly reducing the friction and making the movable seat 7 move more smoothly on the bottom guide seat 3.

[0042] The bottom of the carrying plate 8 is integrally formed with an annular guide frame 25, and the surface of the movable seat 7 is provided with an annular groove 10 that is adapted to the annular guide frame 25. The carrying plate 8 is rotatably connected to the surface of the movable seat 7 through the annular guide frame 25 and the annular groove 10.

[0043] The annular guide 25 is adapted to the annular groove 10, providing precise guidance and positioning reference for the rotation of the carrying plate 8. During the rotation of the carrying plate 8, the annular guide 25 can rotate precisely along the annular groove 10.

[0044] The working principle and usage process of this utility model are as follows: First, open the opening and closing sealing door 2, and control the moving seat 7 to move to the furnace mouth position through the electric guide rail 15. Place the automobile mold casting on the carrying plate 8, and use the conical protrusion 9 to stabilize the casting and increase the heating area. Then, move the moving seat 7 into the furnace body 1, close the opening and closing sealing door 2, start the heat treatment furnace body 1, and the heating element starts to heat the heating chamber 12. The hot air flows out through the air outlet 13, so that the hot air in the furnace forms a circulation under the action of the guide plate 14. At the same time, start the circulating fan 4 to realize the circulation of hot air and ensure uniform distribution of furnace temperature.

[0045] During the heat treatment process, the position of the moving seat 7 can be adjusted by the electric guide rail 15 as needed to change the heating area of ​​the casting in the furnace. At the same time, the servo motor 18 can be started as needed to drive the worm gear 19 to rotate, so that the carrier plate 8 rotates around the transmission rod 21, allowing all parts of the casting to be fully heated.

[0046] After the preset heat treatment time and temperature are reached, the heating chamber 12 is stopped. According to the casting cooling requirements, the speed of the circulating fan 4 is controlled or it is stopped to allow the casting to cool gradually. After cooling is completed, the moving seat 7 is moved to the furnace mouth position via the electric guide rail 15, the opening and closing sealing door 2 is opened, and the heat-treated automobile mold casting is taken out.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automobile mold casting heat treatment furnace with uniform furnace temperature, comprising a furnace body (1) provided with an openable and closable sealing door (2), and a bottom guide base (3) provided at the inner bottom of the furnace body (1). characterized in that A heating cavity (12) is mounted on the inner side wall of the furnace body (1), a plurality of air outlets (13) are formed on the surface of the heating cavity (12), a circulating fan (4) is mounted on the top of the furnace body (1), the air outlet of the circulating fan (4) is connected to the bottom of the heating cavity (12) through an air inlet pipe (6), and the air inlet of the circulating fan (4) is connected to the top of the heating cavity (12) through an air outlet pipe (5).

2. The heat treatment furnace for an automobile mold casting having uniform furnace temperature according to claim 1, characterized in that: A guide plate (14) is arranged at the air outlet (13), the guide plate (14) is arranged inside the heating cavity (12), and the inclination directions of adjacent two guide plates (14) are opposite.

3. The heat treatment furnace for an automobile mold casting having uniform temperature according to claim 1, characterized in that: A moving seat (7) is arranged on the surface of the bottom guide base (3), a load plate (8) is arranged on the surface of the moving seat (7), a transmission rod (21) is rotatably connected to the surface of the moving seat (7), one end of the transmission rod (21) is connected to the load plate (8), the other end of the transmission rod (21) is provided with a worm wheel (20), the transmission rod (21) is slidably connected in a strip-shaped slot one (23) formed on the surface of the bottom guide base (3), and a rotating frame (22) is symmetrically arranged on the bottom surface of the moving seat (7). A worm (19) is rotatably connected between the two rotating frames (22), the worm wheel (20) is engaged with the worm (19), one side of one of the rotating frames (22) is provided with a servo motor (18), one end of the worm (19) is connected to the output shaft end of the servo motor (18), and the rotating frame (22) is slidably connected in a strip-shaped slot two (24) formed on the surface of the bottom guide base (3).

4. The heat treatment furnace for an automobile mold casting having uniform temperature according to claim 3, characterized in that: A connecting frame (17) is slidably connected in the strip-shaped slot one (23), the connecting frame (17) is connected to the moving seat (7), a guide block (16) is arranged on the bottom of the connecting frame (17), and an electric guide rail (15) is arranged in the bottom guide base (3). The guide block (16) is slidably connected to the surface of the electric guide rail (15).

5. The heat treatment furnace for an automobile mold casting having uniform temperature according to claim 3, characterized in that: A plurality of tapered convexities (9) are uniformly arranged on the surface of the load plate (8).

6. The heat treatment furnace for an automobile mold casting having uniform temperature according to claim 3, characterized in that: A plurality of pulleys (11) are arranged on the bottom of the moving seat (7), and the moving seat (7) is slidably connected to the surface of the bottom guide base (3) through the pulleys (11).

7. The heat treatment furnace for an automobile mold casting having uniform temperature according to claim 3, characterized in that: An annular guide frame (25) is integrally formed on the bottom of the load plate (8), an annular groove (10) matched with the annular guide frame (25) is formed on the surface of the moving seat (7), and the load plate (8) is rotatably connected to the surface of the moving seat (7) through the annular guide frame (25) and the annular groove (10).

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