A trolley type heat treatment furnace for alloy castings

Abstract

A kind of alloy casting piece is with trolley type heat treatment furnace, including furnace body, circulating fan, electric heating module and height-adjusting tooling table.The inside of furnace cavity is equipped with height-adjusting tooling table for carrying casting piece, the height of support surface can be adjusted according to the number of casting piece on support surface, so that the volume of chamber can be changed according to the volume of casting piece, cooperate with multiple groups of independent electric heating module controlled by electric heating module, realize the effective compression and accurate temperature control of heating space;Height-adjusting tooling table is composed of bearing table and spliced height-adjusting tooling, and the side of bearing table is provided with sealed flow guide frame, which is attached to the inner wall of furnace body to form airtight separation, to avoid heat diffusion to cavity, and the flow guide channel structure guides hot air flow to flow evenly along the horizontal direction through the surface of casting, to improve heat exchange efficiency.Electric heating module only heats the corresponding height area of first chamber, and transverse air guide window is synchronously opened and closed, to further reduce invalid heat loss, and solve the problem of heat energy waste caused by fixed furnace cavity and space waste of traditional aging furnace.

Description

Technical Field

[0001] This invention belongs to the field of heat treatment technology for castings, specifically referring to a trolley-type heat treatment furnace for alloy castings. Background Technology

[0002] In the heat treatment of alloy castings, aging furnaces are mainly used to eliminate internal stresses generated after casting and solution treatment, and to stabilize the dimensions of castings. The core function is to accelerate the transformation of the internal structure of castings through precisely controlled low-temperature heating and long-term holding, preventing deformation during subsequent processing and use. This process can promote the decomposition of supersaturated solid solutions, causing fine strengthening phases to precipitate in the alloy and distribute evenly, thereby improving the strength, hardness and corrosion resistance of castings. For non-ferrous alloy castings such as aluminum alloys and magnesium alloys, aging treatment is an indispensable key step to tap the potential of materials and obtain the expected mechanical properties.

[0003] In casting production, the aging process parameters (such as holding temperature and time) of alloy castings with different grades, wall thicknesses, or batch requirements often differ. Therefore, it is not possible to simply mix all the remaining space in the furnace and they must be processed in separate furnaces. However, with a fixed furnace volume, if the number of castings processed each time is small, a large amount of space will not be effectively utilized, resulting in significant waste of thermal energy. As long as the furnace door is closed for heating, regardless of the number of workpieces in the furnace, the fixed heat loss such as furnace body heat storage, air heating, and furnace wall heat dissipation must be fully incurred. This fluctuation in the furnace loading caused by the flexible production requirements makes it difficult to completely avoid the increase in energy consumption per unit product to a certain extent. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a trolley-type heat treatment furnace for alloy castings, so as to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted by this invention is as follows: A trolley-type heat treatment furnace for alloy castings is proposed, comprising: The furnace body has an internal cavity for accommodating castings; A circulating fan is installed at the top of the furnace body and provides circulating airflow into the furnace cavity; An electric heating module is installed on the inner wall of the furnace body; A trolley is installed at the bottom of the furnace body and can move in and out of the furnace cavity along the track at the bottom of the furnace body; The furnace cavity is equipped with a height adjustment fixture for supporting castings. The height adjustment fixture is installed on the top of the trolley and can adjust the height of the support surface according to the number of castings on the support surface. The support surface is divided into two independent chambers in the furnace cavity, which respectively contain a first chamber where the castings are located and a second chamber that does not contain castings. The volume of the chamber can be changed according to the volume of the castings. The electric heating module is configured as multiple independently electrically controlled units in the height direction, and the electric heating module corresponding to the height position of the first chamber is in the heating state, while the electric heating module corresponding to the height position of the second chamber is in the non-heating state.

[0006] Furthermore, the height adjustment fixture includes: A support platform used to hold castings; The height adjustment fixture is placed between the support platform and the trolley and is used to adjust the position and height of the support platform; The support platform includes at least one platform panel distributed in the height direction. A sealing guide frame is fixedly provided on the periphery of the platform panel. The sealing guide frame is attached to the inner periphery of the furnace body and is used to separate the first chamber and the second chamber.

[0007] Furthermore, the tabletop includes a horizontally arranged heat-insulating base plate and a plurality of flow-guiding support plates vertically arranged on the top surface of the heat-insulating base plate, and there is a flow-guiding channel between any two adjacent flow-guiding support plates, the flow-guiding channel being configured to guide the airflow in the horizontal direction.

[0008] Furthermore, the tabletop includes two or more horizontally arranged heat-insulating base plates, any two adjacent heat-insulating base plates are connected and fixed by a vertical shaft, each heat-insulating base plate has multiple vertical flow guide plates fixed on its top surface, and any two adjacent flow guide plates have a flow guide channel, the flow guide channel being configured to guide the airflow in the horizontal direction.

[0009] Furthermore, the sealing guide frame includes a first frame, a second frame, and a bucket-shaped heat insulation layer. The first frame is fixed to the outer wall of at least one of the heat insulation base plates. The second frame is located outside the first frame and is fixed to the inner wall of the furnace body. The bucket-shaped heat insulation layer is fixedly connected to the first frame and the second frame.

[0010] Furthermore, the height adjustment fixture includes at least one fixture frame, which is constructed as a frame structure. The top of the fixture frame is provided with a positioning groove, and the bottom of the fixture frame is provided with a positioning protrusion that cooperates with the positioning groove. Any two fixture frames can be spliced ​​and fixed in the height direction.

[0011] Furthermore, the bottom of the heat insulation base plate located at the lowest side is fixedly provided with a positioning clip that cooperates with the positioning groove, so that the heat insulation base plate is spliced ​​and fixed with the tooling frame.

[0012] Furthermore, the inner wall of the furnace body is provided with air guide windows, which include longitudinal air guide windows set at the top and transverse air guide windows set on the side walls. The transverse air guide windows are set in multiple groups in the height direction according to the number and position of the electric heating modules, and the transverse air guide windows are configured to open and close synchronously with the corresponding electric heating modules.

[0013] Furthermore, the platform is configured as two, and a sealing guide frame is fixedly provided on the outer side of each platform. The two sets of sealing guide frames divide the first chamber into a first upper chamber and a first lower chamber, and the heating temperature of the electric heating module corresponding to the first upper chamber and the first lower chamber is different.

[0014] Furthermore, the inner wall of the furnace body is provided with multiple slots, and the sealing guide frame is fitted onto the slots.

[0015] Beneficial effects: This invention utilizes an adjustable height fixture to divide the furnace cavity into a first chamber containing only castings and a second chamber not containing castings. Multiple independently controlled electric heating modules are integrated to achieve effective compression and precise temperature control of the heating space. The adjustable height fixture consists of a support platform and connectable height-adjusting fixtures. A sealed flow guide frame is provided around the support platform, forming an airtight separation against the inner wall of the furnace to prevent heat diffusion into the cavity. The flow guide channel structure guides the hot airflow evenly across the casting surface in a horizontal direction, improving heat exchange efficiency. The electric heating modules heat only the corresponding height area of ​​the first chamber, and the horizontal air guide windows open and close simultaneously, further reducing ineffective heat loss. This solution reduces unit energy consumption, improves heat treatment efficiency and temperature control accuracy when dealing with the aging treatment of small batches and various types of castings, solving the problem of heat energy waste caused by the fixed furnace cavity and wasted space in traditional aging furnaces. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a trolley-type heat treatment furnace for alloy castings according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a trolley-type heat treatment furnace for alloy castings according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the furnace cavity under compressed conditions according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the support fixture for the casting provided in an embodiment of the present invention; Figure 5This is a three-dimensional structural diagram of a half-section of the support platform according to an embodiment of the present invention; Figure 6 This is a schematic diagram of airflow guidance in a half-section of the support platform according to an embodiment of the present invention.

[0017] Among them, 10 is the furnace body; 100 is the furnace cavity; 101 is the air guide channel; 11 is the track; 12 is the air guide window; 121 is the longitudinal air guide window; 122 is the transverse air guide window; 13 is the slot; 20 is the circulating fan; 30 is the electric heating module; 40 is the trolley; 50 is the height adjustment fixture; 51 is the fixture frame; 510 is the positioning slot; 511 is the positioning protrusion; 60 is the support platform; 61 is the platform panel; 610 is the flow guide channel; 611 is the heat insulation base plate; 612 is the flow guide support plate; 62 is the sealing flow guide frame; 621 is the first frame; 622 is the second frame; 623 is the bucket-shaped heat insulation layer; and 63 is the positioning clip shaft.

[0018] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0020] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a trolley-type heat treatment furnace for alloy castings, including a furnace body 10, a circulating fan 20, an electric heating module 30, a trolley 40, and a height-adjustable tooling table.

[0022] The furnace body 10 has a furnace cavity 100 inside to accommodate castings. A circulating fan 20 is installed at the top of the furnace body 10 and provides circulating airflow into the furnace cavity 100. An air guide channel 101 is installed on the inner wall of the furnace body 10 to guide the airflow to the electric heating module 30 for heating. The electric heating module 30 is installed on the inner wall of the furnace body 10. A trolley 40 is installed at the bottom of the furnace body 10 and can enter and exit the furnace cavity 100 along the track 11 at the bottom of the furnace body 10.

[0023] Furthermore, the furnace cavity 100 is equipped with a height-adjustable fixture for supporting the castings. This fixture is mounted on top of the trolley 40 and its height can be adjusted according to the number of castings on the support surface. The support surface is attached to the inner wall of the furnace body 10 via a sealing guide frame 62, dividing the furnace cavity 100 into two independent chambers: a first chamber containing the castings and a second chamber not containing castings. By adjusting the height of the support surface, the volumes of the first and second chambers can be changed, ensuring that the heating space always matches the actual space occupied by the castings, thus avoiding ineffective heating of the cavity.

[0024] In some embodiments, setting the ratio of the volume of the first chamber to the volume occupied by the casting in the range of 1.2 to 1.5 ensures sufficient circulation and uniform heat exchange of the hot air around the casting while minimizing ineffective heating space, thus achieving a better level of thermal efficiency. If the ratio is too small, the narrow airflow channel can easily lead to local overheating or poor circulation; if the ratio is too large, the ineffective space increases, and heat loss rises. Therefore, by adjusting the tooling table to the above-mentioned ratio range, energy-saving effects can be achieved while ensuring the quality of heat treatment.

[0025] Furthermore, the electric heating modules 30 are configured as multiple independently electrically controlled groups along the height direction, with the electric heating module 30 corresponding to the height position of the first chamber in a heating state and the electric heating module 30 corresponding to the height position of the second chamber in a non-heating state. This ensures uniform heating of the casting while minimizing heat waste and improving energy utilization efficiency.

[0026] like Figure 4 , Figure 5 and Figure 6 As shown, the height adjustment fixture includes a support platform 60 and a height adjustment fixture 50.

[0027] The support platform 60 is used to hold the castings, and the height adjustment fixture 50 is set between the support platform 60 and the trolley 40 to adjust the position and height of the support platform 60. The height adjustment fixture 50 is composed of multiple splicable fixture frames 51. By increasing or decreasing the number of fixture frames 51, the installation height of the support platform 60 can be changed to accommodate the volume and quantity of castings in different batches.

[0028] Furthermore, the support platform 60 includes at least one platform panel 61 distributed along its height. A sealing guide frame 62 is fixedly provided on the periphery of the platform panel 61. The sealing guide frame 62 is attached to the inner periphery of the furnace body 10 to separate the first chamber and the second chamber. This structure ensures that hot airflow does not enter the cavity area without castings, reducing heat loss.

[0029] In the first embodiment, the platform 61 includes a horizontally arranged heat-insulating base plate 611 and a plurality of flow-guiding supports 612 vertically arranged on the top surface of the heat-insulating base plate 611. A flow-guiding channel 610 is provided between any two adjacent flow-guiding supports 612, and the flow-guiding channel 610 is configured to guide the airflow in a horizontal direction. This structure helps to evenly distribute the hot airflow on the surface of the casting, avoiding localized overheating or excessive temperature differences.

[0030] In the second embodiment, the platform 61 includes two or more horizontally arranged heat-insulating base plates 611. Any two adjacent heat-insulating base plates 611 are connected and fixed by a vertical shaft. Each heat-insulating base plate 611 has multiple vertical flow guide plates 612 fixed to its top surface, and any two adjacent flow guide plates 612 have a flow guide channel 610 configured to guide airflow horizontally. This structure is suitable for larger castings or castings requiring layered arrangement, improving space utilization.

[0031] Furthermore, two platform panels 61 are provided, each with a fixed sealing guide frame 62 on its outer side. The two sets of sealing guide frames 62 divide the first chamber into a first upper chamber and a first lower chamber, with the electric heating modules 30 corresponding to the first upper chamber and the first lower chamber having different heating temperatures. This structure is suitable for simultaneously processing castings with different heat treatment temperature requirements, improving the equipment's versatility and production efficiency.

[0032] For example, when a batch of thin-walled aluminum alloy castings and a batch of thick-walled magnesium alloy castings need to be processed simultaneously, the aluminum alloy castings can be placed in the first upper chamber and the magnesium alloy castings in the first lower chamber. The upper heating temperature can be set to 160°C and the lower heating temperature to 200°C, respectively. Since the two sets of sealed flow guide frames 62 effectively isolate the heat exchange between the upper and lower chambers, and with the independently controlled electric heating module 30, the aging treatment of the two materials can be completed in the same furnace, avoiding the waste of time and energy caused by separate furnace processing, and improving equipment utilization and production flexibility.

[0033] The inner wall of the furnace body 10 is provided with multiple slots 13, and the sealing guide frame 62 is fitted into the slots 13 to facilitate installation and positioning, while ensuring the separation effect.

[0034] like Figure 5 and Figure 6As shown, the sealing guide frame 62 includes a first frame 621, a second frame 622, and a funnel-shaped heat insulation layer 623. The first frame 621 is fixed to the outer wall of at least one heat-insulating base plate 611. The second frame 622 is located outside the first frame 621 and is fixed to the inner wall of the furnace body 10. The funnel-shaped heat insulation layer 623 is fixedly connected to the first frame 621 and the second frame 622. This structure not only provides a sealing function but also effectively blocks heat conduction from the first chamber to the second chamber, further improving the heat preservation effect.

[0035] The funnel-shaped insulation layer 623 is made of high-temperature resistant ceramic fiber felt or aluminum silicate needle-punched blanket, which can effectively block the conduction of heat from the first chamber to the second chamber. At the same time, the surface of the funnel-shaped insulation layer 623 is cured, which has a certain resistance to airflow erosion and prevents fiber shedding or structural deformation caused by the high-speed airflow generated by the circulating fan 20.

[0036] In some embodiments, the bucket-shaped insulation layer 623 adopts an expanding bucket-shaped structure from the inside out. Its inclined inner surface forms a natural guiding slope in the airflow direction. When the circulating fan 20 drives the hot airflow downward and turns along the inner wall of the furnace body 10, the slope of the bucket-shaped insulation layer 623 can smoothly guide part of the hot airflow flowing down the furnace wall to the inlet of the guiding channel 610, reducing the eddy loss of airflow at the corner and improving the efficiency of airflow entering the guiding channel 610. At the same time, the bucket-shaped structure forms a transition area between the insulation base plate 611 and the inner wall of the furnace body 10, avoiding local airflow obstruction or backflow caused by right-angle turns, thereby ensuring a more uniform and stable airflow organization in the first chamber.

[0037] Furthermore, the height adjustment fixture 50 includes at least one fixture frame 51. The fixture frame 51 is constructed as a frame structure. The top of the fixture frame 51 is provided with a positioning groove 510, and the bottom of the fixture frame 51 is provided with a positioning protrusion 511 that mates with the positioning groove 510. Any two fixture frames 51 can be spliced ​​and fixed in the height direction. This structure facilitates quick assembly and disassembly and height adjustment, adapting to the loading requirements of different castings.

[0038] Furthermore, the bottom of the lowest heat-insulating base plate 611 is fixedly equipped with a positioning clip 63 that mates with the positioning groove 510, so that the heat-insulating base plate 611 is spliced ​​and fixed to the tooling frame 51. This structure ensures a stable connection between the support platform 60 and the height adjustment tooling 50, preventing displacement during the movement of the trolley 40 or during heat treatment.

[0039] like Figure 2 and Figure 3As shown, the inner wall of the furnace body 10 is provided with air guide windows 12. The air guide windows 12 include a longitudinal air guide window 121 disposed at the top and a transverse air guide window 122 disposed on the side wall. The transverse air guide windows 122 are arranged in multiple groups in the height direction according to the number and position of the electric heating modules 30, and the transverse air guide windows 122 are configured to open and close synchronously with the corresponding electric heating modules 30. This design ensures that the hot airflow only flows to the area being heated, avoiding hot air from entering the cavity area, and further improving thermal efficiency.

[0040] In conjunction with the above embodiments, this invention, through the structural design of the heightened tooling platform, combined with multiple independently controlled electric heating modules 30 and synchronously opening and closing air guide windows 12, achieves dynamic adjustment of the heating space within the heat treatment furnace cavity 100, solving the problems of space waste and high energy consumption in traditional aging furnaces when the furnace load fluctuates. Simultaneously, through structural optimization of the flow guide channel 610 and the sealing flow guide frame 62, uniform distribution of hot airflow on the surface of the casting is ensured, improving the quality and efficiency of heat treatment.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A trolley-type heat treatment furnace for alloy castings, characterized in that, include: The furnace body (10) has a furnace cavity (100) inside to accommodate castings. A circulating fan (20) is provided at the top of the furnace body (10) and provides circulating airflow into the furnace cavity (100); An electric heating module (30) is disposed on the inner wall of the furnace body (10); A trolley (40) is located at the bottom of the furnace body (10) and can enter and exit the furnace cavity (100) along the track (11) at the bottom of the furnace body (10). The furnace cavity (100) is equipped with a height adjustment fixture for supporting castings. The height adjustment fixture is installed on the top of the trolley (40) and can adjust the height of the support surface according to the number of castings on the support surface. The support surface is divided into two independent chambers in the furnace cavity (100), which respectively contain a first chamber where the castings are located and a second chamber that does not contain castings. The volume of the chamber can be changed according to the volume of the castings. The electric heating module (30) is configured as multiple independently electrically controlled units in the height direction, and the electric heating module (30) corresponding to the height position of the first chamber is in a heating state, while the electric heating module (30) corresponding to the height position of the second chamber is in a non-heating state.

2. The trolley-type heat treatment furnace for alloy castings according to claim 1, characterized in that: The height adjustment fixture includes: A support platform (60) is used to hold castings; The height adjustment fixture (50) is set between the support platform (60) and the trolley (40) and is used to adjust the position and height of the support platform (60); The support platform (60) includes at least one platform panel (61) distributed in the height direction. A sealing guide frame (62) is fixedly provided on the periphery of the platform panel (61). The sealing guide frame (62) is attached to the inner wall of the furnace body (10) and is used to separate the first chamber and the second chamber.

3. The trolley-type heat treatment furnace for alloy castings according to claim 2, characterized in that: The tabletop (61) includes a horizontally arranged heat-insulating base plate (611) and a plurality of flow guide plates (612) vertically arranged on the top surface of the heat-insulating base plate (611), and there is a flow guide channel (610) between any two adjacent flow guide plates (612), the flow guide channel (610) being configured to guide the airflow in the horizontal direction.

4. The trolley-type heat treatment furnace for alloy castings according to claim 2, characterized in that: The tabletop (61) includes two or more horizontally arranged heat-insulating base plates (611). Any two adjacent heat-insulating base plates (611) are connected and fixed by a vertical shaft. Each heat-insulating base plate (611) has multiple vertical flow guide plates (612) fixed on its top surface. Any two adjacent flow guide plates (612) have a flow guide channel (610). The flow guide channel (610) is configured to guide the airflow in the horizontal direction.

5. The trolley-type heat treatment furnace for alloy castings according to any one of claims 3 or 4, characterized in that: The sealed flow guide frame (62) includes a first frame (621), a second frame (622), and a bucket-shaped heat insulation layer (623). The first frame (621) is fixed on the outer wall of at least one of the heat insulation base plates (611). The second frame (622) is located outside the first frame (621) and is fixed to the inner wall of the furnace body (10). The bucket-shaped heat insulation layer (623) is fixedly connected to the first frame (621) and the second frame (622).

6. The trolley-type heat treatment furnace for alloy castings according to claim 5, characterized in that: The height adjustment fixture (50) includes at least one fixture frame (51), which is constructed as a frame structure. The top of the fixture frame (51) is provided with a positioning groove (510), and the bottom of the fixture frame (51) is provided with a positioning protrusion (511) that cooperates with the positioning groove (510). Any two fixture frames (51) can be spliced ​​and fixed in the height direction.

7. The trolley-type heat treatment furnace for alloy castings according to claim 6, characterized in that: The bottom of the heat insulation base plate (611) located at the lowest side is fixedly provided with a positioning clip (63) that cooperates with the positioning groove (510), so that the heat insulation base plate (611) is spliced ​​and fixed with the tooling frame (51).

8. The trolley-type heat treatment furnace for alloy castings according to claim 1, characterized in that: The inner wall of the furnace body (10) is provided with air guide windows (12). The air guide windows (12) include a longitudinal air guide window (121) set at the top and a transverse air guide window (122) set on the side wall. The transverse air guide windows (122) are set in multiple groups in the height direction according to the number and position of the electric heating modules (30), and the transverse air guide windows (122) are configured to open and close synchronously with the corresponding electric heating modules (30).

9. The trolley-type heat treatment furnace for alloy castings according to claim 4, characterized in that: The tabletop (61) is configured as two, and a sealing guide frame (62) is fixedly provided on the outer side of each tabletop (61). The two sets of sealing guide frames (62) divide the first chamber into a first upper chamber and a first lower chamber, and the heating temperature of the electric heating module (30) corresponding to the first upper chamber and the first lower chamber is different.

10. The trolley-type heat treatment furnace for alloy castings according to claim 9, characterized in that: The inner wall of the furnace body (10) is provided with multiple slots (13), and the sealing guide frame (62) is fitted onto the slots (13).

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