Oil quenching furnace for heat treatment of metal workpiece

Abstract

The invention relates to the technical field of workpiece heat treatment, in particular to an oil quenching furnace for metal workpiece heat treatment. The conveying assembly comprises an annular guide rail arranged between the machine frame and the inner top of the supporting frame, a sawtooth structure is arranged at the bottom of the annular guide rail, sliding frames are arranged on the annular guide rail at intervals in a sliding mode, electric gears meshed with the sawtooth structure of the annular guide rail are arranged on the sliding frames, and connecting plates are arranged at the bottoms of the sliding frames. Winding devices are arranged on the two sides of the connecting plate. Through cooperative operation of the conveying assembly and the feeding assembly and combination of the design of the annular guide rail, continuous movement of workpieces in the machine frame along an annular path is achieved, seamless connection between the heating process and the cooling process is ensured, in addition, the pushing plate matched with the containing table is specially arranged, the conveying speed of workpiece heat treatment is greatly increased, and the heat treatment efficiency is improved. Integrated continuous operation in the furnace is achieved, waiting time between procedures is shortened, the requirement for connection with other equipment is lowered, and the automation level of the production process is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece heat treatment, and particularly to an oil quenching furnace for heat treating metal workpieces. Background Art

[0002] An oil quenching furnace is a device used for quenching metal workpieces in the heat treatment process. During the heat treatment, the metal workpiece is first heated to a certain temperature to change its internal crystal structure, so as to achieve the purpose of improving mechanical properties (such as hardness, strength, etc.). The heated workpiece needs to be quickly cooled to lock these internal changes, and this process is called quenching. The oil quenching furnace is a special quenching tool that uses mineral oil or other special quenching oils as the cooling medium.

[0003] However, the current oil quenching process flow has certain limitations. Specifically, when using an oil quenching furnace to heat treat a workpiece, first, a mobile device is needed to transport the workpiece to the furnace inlet, and then the workpiece is sent into the furnace for heating by means of a traction device inside the furnace. After heating, the workpiece is immersed in the cooling oil to complete the cooling process. This conveying method can only process one workpiece at a time, and since the external transportation and the internal furnace conveying operations are independent of each other, the entire process is intermittent and requires continuous coordination of each step. This not only reduces the overall processing effect but also makes it difficult to ensure the continuity of the operation, seriously restricting the production efficiency and equipment utilization rate.

[0004] Therefore, it is necessary to propose an oil quenching furnace for heat treating metal workpieces that can achieve continuous operation, aiming to overcome the deficiencies in the prior art and improve the continuity and efficiency of production. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an oil quenching furnace for heat treating metal workpieces that can achieve continuous operation, aiming to overcome the deficiencies in the prior art and improve the continuity and efficiency of production.

[0006] The technical solution is as follows: An oil quenching furnace for heat treating metal workpieces, comprising: A machine frame, with an oil immersion frame disposed inside the machine frame; A support frame, arranged at the front end of the machine frame; A heating chamber, arranged on the side wall of the machine frame, and a placement table is disposed inside the heating chamber; A conveying assembly for continuously conveying workpieces. The conveying assembly includes an annular guide rail disposed between the inner top of the machine frame and the support frame. The bottom of the annular guide rail is provided with a serrated structure, and sliding frames are arranged at intervals on the annular guide rail. An electric gear meshing with the serrated structure of the annular guide rail is installed on the sliding frame. A connecting plate is provided at the bottom of the sliding frame. Coiling devices are provided on both sides of the connecting plate. The rope ends of the coiling devices on both sides are respectively connected to a buckle plate, and a multi-stage telescopic rod covering the adjacent rope body is provided at the bottom of the connecting plate. The telescopic end of the multi-stage telescopic rod is connected to the buckle plate on the same side; A feeding assembly for connecting and conveying workpieces. The feeding assembly includes a cylinder disposed in the machine frame. The telescopic end of the cylinder is connected with a mounting frame. A chain drive assembly is arranged in the mounting frame. A push plate slidably matched with the mounting frame is arranged on the moving member of the chain drive assembly. The push plate is located at the opening of the heating chamber.

[0007] Preferably, the coiling device includes a dual-axis motor I disposed on both sides of the top of the connecting plate. A winding cylinder is connected to both output ends of the dual-axis motor I. The multi-stage telescopic rod is adapted to the layout of the winding cylinder. The rope on the winding cylinder slidably passes through the connecting plate and is connected to the adjacent buckle plate.

[0008] Preferably, the chain drive assembly includes a dual-axis motor II disposed on the mounting frame. A group of sprockets arranged at intervals are respectively rotatably disposed on the front and rear sides of the mounting frame. The right sprockets are respectively connected to both output ends of the dual-axis motor II, and a coupling shaft is arranged between the left sprockets. A chain is arranged between two sprockets in the same group. The bottom of the push plate is connected to the chains on both sides.

[0009] Preferably, a cooling assembly is further included and disposed in the machine frame. The cooling assembly includes circulation frames stacked from bottom to top in the machine frame. A conveying pipe communicating with an oil immersion frame is connected to one side of each circulation frame. A liquid extraction pump is installed on each conveying pipe, and a circulation pipe connected to the end of the corresponding conveying pipe is arranged in each circulation frame. The end of the circulation pipe communicates with the other side of the oil immersion frame.

[0010] Preferably, heat dissipation fins surrounding the corresponding circulation pipe are arranged in each circulation frame.

[0011] Preferably, the cooling assembly further includes ventilation frames disposed on both sides of the circulation frames. The ventilation frames penetrate through the side walls of the machine frame, and filters are arranged at the ends of the ventilation frames. A wind turbine is installed in each ventilation frame on one side.

[0012] Preferably, a draining chamber is further included and disposed in the machine frame. The draining chamber is located in front of the oil immersion frame and is communicated with it. A support plate is arranged on the upper side wall of the draining chamber. An assembly frame is rotatably inclined on the support plate. Fans are installed at intervals in the assembly frame, and a ventilation net is further assembled on the assembly frame for the circulation treatment of air flow. Contact frames in contact with the assembly frame are arranged on both sides of the sliding frame.

[0013] Preferably, it further includes a filter screen assembly disposed on the upper side wall of the machine frame. The filter screen assembly includes electric push rods disposed on the upper side wall of the machine frame. There are at least two electric push rods and they are all located above the oil immersion frame. A connecting frame is arranged between the telescopic ends of the electric push rods, and a filter frame is clamped in the connecting frame.

[0014] Preferably, electric bidirectional lead screws are symmetrically arranged at the opening of the heating chamber. A set of upper and lower spaced closing plates are threadedly arranged between the lead screw bodies of the electric bidirectional lead screws on both sides, and the closing plates on both sides respectively correspond to the threads on one side.

[0015] Preferably, a notch extending inward is formed on the buckle plate, and a block with two inclined surfaces on both sides is arranged on the notch.

[0016] Advantages of the present invention: 1. Through the coordinated operation of the conveying assembly and the feeding assembly, combined with the design of the annular guide rail, winding equipment and multi-stage telescopic rod, the present invention realizes the continuous movement of the workpiece along the annular path in the machine frame, ensures the seamless connection between the heating and cooling processes, makes the entire conveying process smoother. In addition, a push plate matching the placement table is specially configured, which greatly improves the transmission speed of the workpiece heat treatment, ensures the smooth transition from heating to oil immersion, realizes the integrated continuous operation in the furnace, reduces the waiting time between processes, reduces the need for connection with other equipment, and also improves the automation level of the production process, correspondingly reducing manual intervention and significantly improving the overall work efficiency. In summary, the present device provides an efficient and continuous workpiece processing solution, effectively optimizing the processing flow.

[0017] 2. The cooling assembly in the present invention adopts stacked circulation frames, which can adaptively extract the cooling oil in the oil immersion frames at different height positions, and combined with the cooperation of the ventilation frame and the wind turbine, perform circulating cooling treatment on the heated cooling oil to maintain the best working state. This not only accelerates the circulation of the cooling oil but also enhances the air circulation, greatly improving the cooling efficiency and uniformity, and helping to ensure the quality of the workpiece.

[0018] 3. Through the application of the draining chamber and the filter screen assembly, the present invention can effectively remove the excess cooling oil on the surface of the processed workpiece and filter and recycle the cooling oil, which is environmentally friendly and economical. At the same time, the filter screen assembly can further clean the oil residue in the used cooling oil to ensure the effective utilization of resources. Description of the Drawings

[0019] Figure 1 It is a schematic assembly structure diagram of the present invention.

[0020] Figure 2 It is a three-dimensional structural sectional view of components such as the conveying assembly, feeding assembly and draining chamber of the present invention.

[0021] Figure 3 This is a three-dimensional structural sectional view of components such as the electric bidirectional lead screw, closing plate, and placement table of the present invention.

[0022] Figure 4 This is a three-dimensional structural schematic diagram of some components of the conveying assembly of the present invention.

[0023] Figure 5 This is a three-dimensional structural schematic diagram of the disassembled components of the conveying assembly of the present invention.

[0024] Figure 6 This is a three-dimensional structural schematic diagram of some components of the feeding assembly of the present invention.

[0025] Figure 7 This is a three-dimensional structural schematic diagram of the disassembled components of the feeding assembly of the present invention.

[0026] Figure 8 This is a three-dimensional structural sectional view of some components of the cooling assembly of the present invention.

[0027] Figure 9 This is a three-dimensional structural sectional view of components such as the conveying pipe, liquid extraction pump, and circulation pipe of the present invention.

[0028] Figure 10 This is a three-dimensional structural sectional view of components such as the contact frame, support plate, and assembly frame of the present invention.

[0029] Figure 11 This is a three-dimensional structural sectional view of components such as the assembly frame, fan, and ventilation net of the present invention.

[0030] Figure 12 This is a three-dimensional structural schematic diagram of the components of the oil immersion frame and filter screen assembly of the present invention.

[0031] Figure 13 This is a three-dimensional structural schematic diagram of the disassembled connection frame and filter frame of the present invention.

[0032] Description of reference numerals: 100, workpiece; 1, machine frame; 11, oil immersion frame; 2, support frame; 3, heating chamber; 31, electric bidirectional lead screw; 32, closing plate; 33, placement table; 4, conveying assembly; 41, annular guide rail; 42, sliding frame; 43, electric gear; 44, connecting plate; 45, first dual-shaft motor; 46, winding drum; 47, multi-stage telescopic rod; 48, clamping plate; 481, abutting block; 5, feeding assembly; 51, cylinder; 52, mounting frame; 53, second dual-shaft motor; 54, sprocket; 55, chain; 56, pushing plate; 6, cooling assembly; 61, circulation frame; 62, conveying pipe; 63, liquid pumping pump; 64, circulation pipe; 641, heat dissipation fins; 65, ventilation frame; 66, filter screen; 67, wind turbine; 7, draining chamber; 71, contact frame; 72, support plate; 73, assembly frame; 74, fan; 75, ventilation net; 8, filter sieve assembly; 81, electric push rod; 82, connecting frame; 83, filter frame. Detailed implementation manners

[0033] The present invention will be further described below in conjunction with the accompanying drawings and detailed implementation manners.

[0034] Embodiment 1: An oil quenching furnace for heat treatment of metal workpieces, as Figures 1 - 7 shown, includes: A machine frame 1, with an oil immersion frame 11 built therein. The oil immersion frame 11 is located at the rear right side inside the machine frame 1, used to accommodate cooling oil and serve as a cooling place for the workpiece 100; A support frame 2, arranged at the front end of the machine frame 1, capable of expanding the extension length of the front side of the machine frame 1 to facilitate the subsequent construction of the conveying route of the workpiece 100; A heating chamber 3, arranged on the left side wall of the machine frame 1, and the opening of the heating chamber 3 communicates with the machine frame 1. A placement table 33 is arranged inside the heating chamber 3. The top of the placement table 33 has an intermittent branch plate-like structure and serves as a placement platform for the workpiece 100 to be heat-treated. Electric bidirectional lead screws 31 are symmetrically arranged on the left and right at the opening of the heating chamber 3. A set of upper and lower spaced closing plates 32 are threadedly arranged between the screw bodies of the two-sided electric bidirectional lead screws 31, and the two-sided closing plates 32 respectively correspond to the threads on one side, so that the closing plates 32 can move relatively through the threads on the two-sided bidirectional screw bodies to realize the opening and closing operation, ensuring that the heating chamber 3 can maintain a completely sealed state during operation; The conveying assembly 4 for continuously conveying the workpiece 100, the conveying assembly 4 includes an annular guide rail 41 fixedly arranged between the inner top of the machine frame 1 and the support frame 2. A sawtooth structure is provided at the bottom of the annular guide rail 41, and sliding frames 42 are arranged on the annular guide rail 41 at intervals. An electric gear 43 meshing with the sawtooth structure of the annular guide rail 41 is installed on the sliding frame 42. The electric gear 43 is composed of a motor and a driving gear. The electric motor drives the driving gear to rotate and mesh with the sawtooth structure of the annular guide rail 41, so as to realize the circumferential movement of the sliding frame 42 along the annular guide rail 41, constituting a complete movement track for the workpiece 100 to move around the entire device. A connecting plate 44 is fixedly arranged at the bottom of the sliding frame 42. Winding devices are arranged on both the front and rear sides of the top of the connecting plate 44. The rope ends of the winding devices on both sides are respectively connected to a buckle plate 48. An inward-extending notch is provided on the buckle plate 48, and a blocking block 481 with two inclined surfaces is arranged on the notch. By buckling the workpiece 100 between the notches of the buckle plates 48 on both sides, the rapid assembly of the workpiece 100 to be processed is realized. And due to the arrangement of the blocking block 481, it acts as a protrusion at the notch to effectively limit the position of the workpiece 100 after assembly. At the same time, the inclined surface design of the blocking block 481 facilitates the disassembly and assembly of the workpiece 100, making the operation more simple and fast. A multi-stage telescopic rod 47 covering the adjacent rope body is arranged at the bottom of the connecting plate 44. The telescopic end of the multi-stage telescopic rod 47 is connected to the buckle plate 48 on the same side. This makes the lifting operation of the buckle plate 48 more stable, and obtains the additional guidance and support provided by the multi-stage telescopic rod 47 for the workpiece 100, ensuring the stability of the workpiece 100 during the movement; Specifically, through the design of this annular conveying track, the workpiece 100 can start from entering the device in a circumferential progressive manner, successively pass through the heating chamber 3 and then reach the oil immersion frame 11, realizing the coherence and integrity of the operation, effectively reducing the residence time and connection problems, and making the processing flow of the workpiece 100 simpler and more efficient.

[0035] The feeding assembly 5 for connecting and conveying the workpiece 100, the feeding assembly 5 includes a cylinder 51 arranged in the machine frame 1. An installation frame 52 is connected to the telescopic end of the cylinder 51. A chain drive assembly is arranged in the installation frame 52. A push plate 56 slidably matched with the installation frame 52 is arranged on the moving part of the chain drive assembly. The push plate 56 operates in a left-right sliding manner. The push plate 56 presents a branched form misaligned with the structure of the placement table 33, and the push plate 56 is located at the opening of the heating chamber 3.

[0036] Specifically, since the heating chamber 3 needs to maintain a sealed environment during operation, the cylinder 51 is used to control the lifting and lowering of the push plate 56 to achieve the delivery of the workpiece 100 . First, the cylinder 51 drives the push plate 56 to rise, so that it contacts and lifts the workpiece 100, ensuring that the workpiece 100 is free from the restriction of the buckle plate 48, and then the push plate 56 is pushed to the left with the help of the chain drive assembly to send the workpiece 100 into the opened heating chamber 3. When the workpiece 100 completely enters the heating chamber, the cylinder 51 is turned on again and drives the push plate 56 to descend a certain distance. By utilizing the misaligned design of the push plate 56 and the placement table 33, the push plate 56 is embedded in the gap of the placement table 33, thereby breaking away from the contact with the workpiece 100. Finally, the push plate 56 moves right to exit the heating chamber 3, and the closing plate 32 is closed, so that the workpiece 100 that has been safely placed can be heat treated, so that the workpiece 100 is seamlessly transferred from the conveying assembly 4 to the heating chamber 3, reducing unnecessary pause time, and making the entire conveying process in one device to realize integrated operation. When the required position is reached, the next process can be carried out, thereby improving the continuity and efficiency of the entire left and right processes.

[0037] like Figure 4 and Figure 5 As shown, the winding equipment includes a dual-axis motor 45 arranged on the front and rear sides of the top of a connecting plate 44, and a winding drum 46 is connected to the output ends on both sides of the dual-axis motor 45. A lifting rope is wound on the winding drum 46. The rope on the winding drum 46 slides through the connecting plate 44 and is connected to the adjacent buckle plate 48. At the same time, the number and layout of the multi-stage telescopic rods 47 are adapted to the winding drum 46, so that the multi-stage telescopic rods 47 are arranged on the connecting plate 44 in a surrounding manner, and are respectively mounted on the periphery of the adjacent lifting rope. The surrounding layout design of the multi-stage telescopic rods 47 ensures that the lifting rope can remain vertical and stable during operation, reduces the unstable factors caused by the swinging or tilting of the rope, and improves the stability and safety of the overall operation.

[0038] like Figure 6 and Figure 7 As shown, the chain drive assembly includes a dual-axis motor 53 arranged on a mounting frame 52, and a group of spaced sprockets 54 are rotatably arranged on the front and rear sides of the mounting frame 52, the right sprocket 54 is respectively connected to the output ends of the dual-axis motor 53, and a connecting shaft is arranged between the left sprockets 54, and a chain 55 is arranged between the two sprockets 54 in the same group, and the bottom of the push plate 56 is connected to the chains 55 on both sides, the right sprocket 54 is accurately driven by the dual-axis motor 53, and the left sprocket 54 is synchronously driven by the chain 55, to ensure that the chain 55 is tensioned and rotated, so as to maintain the overall smooth operation, realize the precise positioning and movement control of the push plate 56, and improve the accuracy of the workpiece 100 conveying.

[0039] During use, first place the device on a stable support surface and check whether all internal components are operating normally to ensure that the oil immersion frame 11 is filled with sufficient cooling oil. Prepare the required number of workpieces 100 according to the processing requirements, and then push them one by one between the buckle plates 48 at the front left of the support frame 2 to make a stable assembly. At this time, the winding device is in the initial state, that is, the multi-stage telescopic rod 47 does not perform telescopic operation; and so on, assemble the workpieces 100 one by one, and driven by each electric gear 43, drive the sliding frame 42 to rotate clockwise along the annular guide rail 41 until the workpiece 100 is conveyed above the feeding assembly 5. At this time, the electric bidirectional lead screw 31 drives the closing plate 32 to open, and the heating chamber 3 is opened accordingly. At the same time, the cylinder 51 is started, and its telescopic end extends, causing the upper part on it to move upward, pushing the pushing plate 56 to contact and lift the workpiece 100, so that the workpiece 100 is released from the restriction of the buckle plate 48. Then, the double-shaft motor II 53 drives the sprocket 54 to rotate, and under the action of the chain 55, drives the pushing plate 56 loaded with the workpiece 100 to move leftward, so that the workpiece 100 smoothly moves out of the notch of the buckle plate 48 and is sent into the heating chamber 3 until the workpiece 100 completely enters the interior of the heating chamber 3. Immediately, the whole is driven to move downward by the cylinder 51, and then the pushing plate 56 is embedded in the interval of the placing table 33, so that the workpiece 100 is released from the contact restriction of the pushing plate 56 and placed on the placing table 33. Then, the pushing plate 56 moves rightward and exits the heating chamber 3, and the closing plate 32 is closed to start the heat treatment of the workpiece 100; After the workpiece 100 is processed, according to the above operation, adjust the height position of the pushing plate 56 through the cylinder 51 so that the pushing plate 56 is flush with the placing table 33. Then repeat the above operation, drive the pushing plate 56 to move leftward into the heating chamber 3 and embed it in the placing table 33. Then, the cylinder 51 drives the pushing plate 56 to move upward to lift the heat-treated workpiece 100 and make the whole exit the heating chamber 3. Then adjust the height position of the workpiece 100 and re-fasten it between the buckle plates 48, and then the next step of processing can be continued, so that the workpiece 100 moves clockwise along the annular guide rail 41 again until it moves above the oil immersion frame 11. Start the double-shaft motor I 45, drive the winding drum 46 to rotate, cause the lifting rope to extend, and then the multi-stage telescopic rod 47 extends adaptively, so that the workpiece 100 moves downward and immerses in the oil immersion frame 11, thereby performing the cooling treatment. After the cooling is completed, restore the workpiece 100 to the initial height to complete the entire heat treatment process.

[0040] Embodiment 2: On the basis of Embodiment 1, as Figure 1 、 Figure 8 and Figure 9As shown in the figure, it further includes a cooling component 6 disposed within the cabinet 1. The cooling component 6 includes circulation frames 61 stacked from bottom to top within the cabinet 1. There are three circulation frames 61, corresponding to the upper, middle, and lower height positions of the oil immersion frame 11 respectively. The rear sides of the circulation frames 61 are all connected to a delivery pipe 62 that interfaces with the oil immersion frame 11. A liquid extraction pump 63 is installed on each delivery pipe 62, and a circulation pipe 64 connected to the end of the corresponding delivery pipe 62 is disposed within each circulation frame 61. The circulation pipe 64 is in a serpentine surrounding shape, and the end of the circulation pipe 64 is connected to the other side of the oil immersion frame 11, forming a complete cooling oil circulation system.

[0041] As Figure 8 shown, heat dissipation fins 641 surrounding the corresponding circulation pipe 64 are disposed within each circulation frame 61.

[0042] As Figure 8 and Figure 9 shown, the cooling component 6 further includes ventilation frames 65 disposed on the front and rear sides of the circulation frames 61. The ventilation frames 65 all pass through the side walls of the cabinet 1, and filter nets 66 are disposed at the ends of the ventilation frames 65. A wind turbine 67 is installed within each front ventilation frame 65 to accelerate air flow and push cold air, further enhancing the cooling effect.

[0043] Specifically, to ensure that the operating temperature of the oil inside the oil immersion frame 11 remains stable, the cooling component 6 is installed to maintain the oil temperature. The liquid extraction pump 63 extracts the heated oil inside the oil immersion frame 11. Due to the distribution of the delivery pipes 62 at different heights, the oil at the upper, middle, and lower height positions of the oil immersion frame 11 is correspondingly extracted to further enhance the processing effect. The extracted oil then flows through the delivery pipe 62 into the circulation frame 61, and then the oil flows into the circulation pipe 64. At this time, the wind turbine 67 operates synchronously, introducing cold air into the ventilation frame 65. The air flows from front to back, and the filter net 66 simultaneously blocks impurities in the air. When the air passes through the heat dissipation fins 641, the temperature is quickly conducted to the circulation pipe 64, and the heat is quickly carried away through air flow, thereby cooling the oil within the circulation pipe 64. Finally, the cooled oil flows back into the oil immersion frame 11 through the end of the circulation pipe 64, achieving the cooling effect and ensuring the cooling effect of the workpiece 100.

[0044] As Figure 2 、 Figure 10 and Figure 11As shown in the figure, it further includes a draining chamber 7 provided on the right side inside the machine frame 1. At the same time, the draining chamber 7 is located on the front side of the oil immersion frame 11 and the two are interconnected. A support plate 72 is provided on the upper side wall of the draining chamber 7. An assembly frame 73 is rotatably tilted on the support plate 72. The assembly frame 73 has six compartments. A fan 74 is installed in each compartment of the assembly frame 73. And ventilation nets 75 are assembled on the openings of each compartment of the assembly frame 73 for the circulation treatment of air flow. And contact frames 71 that are in contact and cooperate with the assembly frame 73 are provided on both the left and right sides of the sliding frame 42. The contact frames 71 are in a triangular shape along the front and rear directions.

[0045] When the workpiece 100 completes the cooling process, it continues to move along the annular guide rail 41. The contact frames 71 on both sides of the sliding frame 42 will gradually come into contact with the assembly frame 73. Since the contact frames 71 are designed in a triangular shape and have a certain inclination angle, when contacting, they will push the assembly frame 73 and its internal components upward, and rotate at a certain angle along the rotating end of the support plate 72, so that the air outlet of the fan 74 faces the workpiece 100, ensuring that the air flow can cover the workpiece 100 just taken out from the oil immersion frame 11. By blowing the oil attached to the surface of the workpiece 100 with wind, the oil drops to the bottom of the draining chamber 7 and flows back into the oil immersion frame 11. As the contact frames 71 continue to move forward, after the assembly frame 73 reaches the highest point and gradually disengages from the contact frames 71, it begins to gradually reset. Finally, the workpiece 100 is completely conveyed out of the device, completing the entire processing flow.

[0046] As Figure 2 、 Figure 12 and Figure 13 shown in the figure, it further includes a filter screen assembly 8 provided on the upper side wall of the machine frame 1. The filter screen assembly 8 includes electric push rods 81 provided on the upper side wall of the machine frame 1. There are four electric push rods 81 and they are all located above the oil immersion frame 11. A connecting frame 82 is provided between the telescopic ends of the electric push rods 81. A filter frame 83 is clamped in the connecting frame 82. By controlling the height adjustment of the connecting frame 82 and the filter frame 83 by the electric push rods 81, the position of the filter frame 83 can be flexibly adjusted according to actual needs. The filter frame 83 can effectively filter impurities and particulate matters in the cooling oil after use, ensuring the purity of the oil. At the same time, the clamping design of the connecting frame 82 and the filter frame 83 makes the two detachable for subsequent maintenance and care.

[0047] The above embodiments are only for illustrating the technical concept and characteristics of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A metal workpiece heat treatment oil quenching furnace, comprising: A machine frame (1), with an oil immersion frame (11) built therein; A support frame (2), arranged at the front end of the machine frame (1); A heating chamber (3), arranged on the side wall of the machine frame (1), and a placement table (33) is built in the heating chamber (3); It is characterized in that it further comprises: A conveying assembly (4) for continuously conveying the workpiece (100), the conveying assembly (4) includes an annular guide rail (41) arranged between the top of the inner part of the machine frame (1) and the support frame (2), a sawtooth structure is opened at the bottom of the annular guide rail (41), and sliding frames (42) are arranged on the annular guide rail (41) at intervals. An electric gear (43) meshing with the sawtooth structure of the annular guide rail (41) is installed on the sliding frame (42). A connecting plate (44) is arranged at the bottom of the sliding frame (42). Winding devices are arranged on both sides of the connecting plate (44). The rope ends of the winding devices on both sides are respectively connected to a clamping plate (48). And a multi-stage telescopic rod (47) covering the adjacent rope body is arranged at the bottom of the connecting plate (44), and the telescopic end of the multi-stage telescopic rod (47) is connected to the clamping plate (48) on the same side; A feeding assembly (5) for connecting and conveying the workpiece (100), the feeding assembly (5) includes a cylinder (51) arranged in the machine frame (1), an installation frame (52) is connected to the telescopic end of the cylinder (51), a chain drive assembly is arranged in the installation frame (52), and a pushing plate (56) slidingly matched with the installation frame (52) is arranged on the moving part of the chain drive assembly. The pushing plate (56) is located at the opening of the heating chamber (3).

2. The oil quenching furnace for heat treatment of metal workpieces according to claim 1, characterized in that, The winding device includes a double-shaft motor one (45) arranged on both sides of the top of the connecting plate (44). A winding drum (46) is connected to both output ends of the double-shaft motor one (45). The multi-stage telescopic rod (47) is adapted to the layout of the winding drum (46). The rope on the winding drum (46) slidably passes through the connecting plate (44) and is connected to the adjacent clamping plate (48).

3. A metal workpiece heat treatment oil quenching furnace according to claim 2, characterized in that, The chain drive assembly includes a double-shaft motor two (53) arranged on the installation frame (52). A group of chain wheels (54) with an interval layout are respectively rotatably arranged on the front and rear sides of the installation frame (52). The right-side chain wheels (54) are respectively connected to both output ends of the double-shaft motor two (53), and a coupling shaft is arranged between the left-side chain wheels (54). A chain (55) is arranged between two chain wheels (54) in the same group. The bottom of the pushing plate (56) is connected to the chains (55) on both sides.

4. A metal workpiece heat treatment oil quenching furnace according to claim 3, characterized in that, It further includes a cooling component (6) disposed within the cabinet (1). The cooling component (6) includes a circulation frame (61) stacked from bottom to top within the cabinet (1). One side of each circulation frame (61) is communicated with a delivery pipe (62) connected to the oil immersion frame (11). A liquid extraction pump (63) is installed on each delivery pipe (62). A circulation pipe (64) connected to the end of the corresponding delivery pipe (62) is disposed within each circulation frame (61). The end of the circulation pipe (64) is communicated with the other side of the oil immersion frame (11).

5. A metal workpiece heat treatment oil quenching furnace according to claim 4, characterized in that, Radiating fins (641) surrounding the corresponding circulation pipe (64) are disposed within each circulation frame (61).

6. A metal workpiece heat treatment oil quenching furnace according to claim 5, characterized in that, The cooling component (6) further includes ventilation frames (65) disposed on both sides of the circulation frame (61). The ventilation frames (65) penetrate through the side walls of the cabinet (1). A filter screen (66) is disposed at the end of each ventilation frame (65). A wind turbine (67) is installed within one of the ventilation frames (65).

7. A metal workpiece heat treatment oil quenching furnace according to claim 6, characterized in that, It further includes a draining chamber (7) disposed within the cabinet (1). The draining chamber (7) is located in front of the oil immersion frame (11) and is communicated with it. A support plate (72) is disposed on the upper side wall of the draining chamber (7). An assembly frame (73) is rotatably inclined on the support plate (72). A fan (74) is installed at intervals within the assembly frame (73). A ventilation net (75) is further assembled on the assembly frame (73) for air flow circulation processing. Contact frames (71) in contact with the assembly frame (73) are disposed on both sides of the sliding frame (42).

8. A metal workpiece heat treatment oil quenching furnace according to claim 7, characterized in that, It further includes a filter screen assembly (8) disposed on the upper side wall of the cabinet (1). The filter screen assembly (8) includes electric push rods (81) disposed on the upper side wall of the cabinet (1). There are at least two electric push rods (81), and they are all located above the oil immersion frame (11). A connection frame (82) is disposed between the telescopic ends of the electric push rods (81). A filter frame (83) is clamped within the connection frame (82).

9. A metal workpiece heat treatment oil quenching furnace according to claim 8, characterized in that, Electrically driven bidirectional lead screws (31) are symmetrically disposed at the opening of the heating chamber (3). A set of upper and lower spaced closing plates (32) are threadedly disposed between the screw bodies of the electrically driven bidirectional lead screws (31) on both sides. The closing plates (32) on both sides respectively correspond to the threads on one side.

10. A metal workpiece heat treatment oil quenching furnace according to claim 9, characterized in that, A notch extending inward is formed on the buckle plate (48). A resisting block (481) with inclined surfaces on both sides is disposed on the notch.

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