An oil quenching furnace for heat treatment of metal workpieces

Abstract

This invention relates to the field of workpiece heat treatment technology, and more particularly to an oil quenching furnace for heat treatment of metal workpieces. The conveying assembly includes an annular guide rail disposed between the top of the machine frame and the support frame. The bottom of the annular guide rail has a serrated structure, and sliding frames are arranged at intervals along the annular guide rail. Each sliding frame is equipped with an electric gear that meshes with the serrated structure of the annular guide rail. A connecting plate is disposed at the bottom of the sliding frame, and winding devices are disposed on both sides of the connecting plate. Through the coordinated operation of the conveying assembly and the feeding assembly, combined with the design of the annular guide rail, continuous movement of the workpiece along an annular path within the machine frame is achieved, ensuring seamless connection between the heating and cooling processes. Furthermore, a pusher plate matching the placement table is specially configured, greatly improving the transfer speed of the workpiece heat treatment, realizing integrated continuous operation within the furnace, reducing waiting time between processes, reducing the need for connection with other equipment, and improving the automation level of the production process.

Description

Technical Field

[0001] This invention relates to the field of workpiece heat treatment technology, and in particular to an oil quenching furnace for heat treatment of metal workpieces. Background Technology

[0002] An oil quenching furnace is a piece of equipment used in heat treatment processes to quench metal workpieces. During heat treatment, the metal workpiece is first heated to a certain temperature to change its internal crystal structure, thereby improving its mechanical properties (such as hardness and strength). The heated workpiece needs to be rapidly cooled to lock in these internal changes; this process is called quenching. An oil quenching furnace is a quenching appliance specifically designed to use mineral oil or other special quenching oils as the cooling medium.

[0003] However, current oil quenching processes have certain limitations. Specifically, when using an oil quenching furnace to heat-treat workpieces, the workpiece must first be transported to the furnace inlet using a mobile device, and then fed into the furnace for heating using an internal traction device. After heating, the workpiece is immersed in cooling oil for cooling. This method can only process one workpiece at a time, and because the external transport and the internal transport operations are independent, the entire process is intermittent, requiring constant coordination of the steps. This not only reduces the overall processing efficiency but also makes it difficult to ensure the continuity of operations, severely restricting production efficiency and equipment utilization.

[0004] Therefore, it is necessary to propose an oil quenching furnace for heat treatment of metal workpieces that can achieve continuous operation, in order to overcome the shortcomings of the existing technology and improve the continuity and efficiency of production. Summary of the Invention

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

[0006] The technical solution is as follows: An oil quenching furnace for heat treatment of metal workpieces, comprising:

[0007] The machine frame has an oil-immersed frame inside.

[0008] The support frame is located at the front end of the machine frame;

[0009] The heating chamber is located on the side wall of the machine frame, and a platform is placed inside the heating chamber;

[0010] A conveying assembly for continuously conveying workpieces includes an annular guide rail set between the top of the machine frame and the support frame. The bottom of the annular guide rail has a serrated structure, and sliding frames are arranged at intervals on the annular guide rail. The sliding frames are equipped with electric gears that mesh with the serrated structure of the annular guide rail. A connecting plate is set at the bottom of the sliding frame. Winding devices are set on both sides of the connecting plate. Each end of the rope of the winding devices on both sides is connected to a buckle plate. A multi-stage telescopic rod covering the adjacent rope is set at the bottom of the connecting plate. The telescopic ends of the multi-stage telescopic rod are connected to the buckle plate on the same side.

[0011] A feeding assembly for connecting and conveying workpieces includes a cylinder set in the machine frame, a mounting frame connected to the telescopic end of the cylinder, a chain drive assembly set in the mounting frame, and a pusher plate that slides with the mounting frame on the moving part of the chain drive assembly. The pusher plate is located at the opening of the heating chamber.

[0012] Preferably, the winding device includes a dual-axis motor set on both sides of the top of the connecting plate. A winding drum is connected to each of the output ends of the dual-axis motor. The multi-stage telescopic rod is adapted to the layout of the winding drum. The rope on the winding drum slides through the connecting plate and is connected to the adjacent buckle plate.

[0013] Preferably, the chain drive assembly includes a dual-axis motor II mounted on a mounting frame. A set of spaced sprockets are rotatably mounted on the front and rear sides of the mounting frame. The right sprockets are connected to the output ends of both ends of the dual-axis motor II, while the left sprockets are connected by a coupling shaft. A chain is mounted between two sprockets in the same group, and the bottom of the push plate is connected to the chains on both sides.

[0014] Preferably, the assembly also includes a cooling component disposed within the frame. The cooling component includes flow frames stacked from bottom to top within the frame. Each flow frame has a conveying pipe connected to an oil immersion frame on one side. Each conveying pipe is equipped with a liquid pump. Each flow frame also has a circulation pipe connected to the end of the corresponding conveying pipe. The end of the circulation pipe is connected to the other side of the oil immersion frame.

[0015] Preferably, each circulation frame is equipped with heat dissipation fins surrounding the corresponding circulation tube.

[0016] Preferably, the cooling assembly also includes ventilation frames disposed on both sides of the flow frame, the ventilation frames passing through the side wall of the frame, and the ends of the ventilation frames are provided with filters, and a fan is installed in one ventilation frame.

[0017] Preferably, the machine also includes a draining chamber located in the frame, which is in front of the oil immersion frame and the two are connected. The upper side wall of the draining chamber is provided with a support plate, and an assembly frame is tilted and rotated on the support plate. Fans are installed at intervals in the assembly frame, and a ventilation net is also installed on the assembly frame for airflow treatment. Contact frames that contact and cooperate with the assembly frame are provided on both sides of the sliding frame.

[0018] Preferably, the assembly also includes a filter screen assembly disposed on the upper side wall of the frame. The filter screen assembly includes an electric push rod disposed on the upper side wall of the frame. There are at least two electric push rods, both of which are located above the oil immersion frame. A connecting frame is disposed between the telescopic ends of the electric push rods, and a filter frame is fitted inside the connecting frame.

[0019] Preferably, electric bidirectional lead screws are symmetrically arranged at the opening of the heating chamber, and a set of closed plates with upper and lower spacing are threaded between the lead screw bodies of the electric bidirectional lead screws on both sides, with the closed plates on both sides corresponding to the threads on one side respectively.

[0020] Preferably, the buckle plate has an inwardly extending notch, and a stop block with beveled sides is provided on the notch.

[0021] The beneficial effects of this invention are as follows: 1. By coordinating the operation of the conveying and feeding components, combined with the design of the annular guide rail, winding equipment, and multi-stage telescopic rods, this invention achieves continuous movement of the workpiece along the annular path within the machine frame, ensuring seamless connection between the heating and cooling processes and making the entire conveying process smoother. Furthermore, a pusher plate specifically configured to match the placement table significantly improves the transmission speed of the workpiece during heat treatment and ensures a smooth transition from heating to oil immersion, enabling integrated continuous operation within the furnace. This reduces waiting time between processes, lowers the need for connections with other equipment, and enhances the automation level of the production process, correspondingly reducing manual intervention and significantly improving overall work efficiency. In summary, this device provides an efficient and continuous workpiece processing solution, effectively optimizing the processing flow.

[0022] 2. The cooling component in this invention uses stacked flow frames, which can adaptively extract cooling oil from oil-immersed frames at different heights. Combined with the cooperation of ventilation frames and wind turbines, the cooling oil that has become hot due to temperature rise is circulated and cooled to maintain the optimal working condition. This not only accelerates the circulation of cooling oil, but also enhances air circulation, greatly improves cooling efficiency and uniformity, and helps to ensure the quality of workpieces.

[0023] 3. By using a draining chamber and a filter screen assembly, this invention can effectively remove excess cooling oil from the surface of the workpiece after processing and filter and recycle the cooling oil, which is both environmentally friendly and economical. At the same time, the filter screen assembly can further clean the oil residue in the used cooling oil, ensuring the effective utilization of resources. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the assembly structure of the present invention.

[0025] Figure 2 This is a three-dimensional structural cross-sectional view of the conveying assembly, feeding assembly, and draining chamber of the present invention.

[0026] Figure 3 This is a three-dimensional structural cross-sectional view of the components of the present invention, including the electric bidirectional lead screw, the closing plate, and the placement platform.

[0027] Figure 4 This is a three-dimensional structural diagram of some components of the conveying assembly of the present invention.

[0028] Figure 5 This is a three-dimensional structural diagram of the disassembled components of the conveying assembly of the present invention.

[0029] Figure 6 This is a three-dimensional structural diagram of some components of the feeding assembly of the present invention.

[0030] Figure 7 This is a three-dimensional structural diagram of the disassembled components of the feeding assembly of the present invention.

[0031] Figure 8 This is a three-dimensional structural cross-sectional view of some components of the cooling assembly of the present invention.

[0032] Figure 9 This is a three-dimensional structural cross-sectional view of the components of the present invention, such as the delivery pipe, the liquid pump, and the circulation pipe.

[0033] Figure 10 This is a three-dimensional structural cross-sectional view of the contact frame, support plate, and assembly frame of the present invention.

[0034] Figure 11 This is a three-dimensional structural cross-sectional view of the assembly frame, fan, and ventilation mesh of the present invention.

[0035] Figure 12 This is a three-dimensional structural diagram of the components of the oil immersion frame and filter screen assembly of the present invention.

[0036] Figure 13 This is a schematic diagram of the three-dimensional structure of the connecting frame and filter frame after they are separated according to the present invention.

[0037] Explanation of reference numerals in the attached drawings: 100. Workpiece; 1. Machine frame; 11. Oil-immersed frame; 2. Support frame; 3. Heating chamber; 31. Electric bidirectional lead screw; 32. Closing plate; 33. Placement table; 4. Conveying assembly; 41. Circular guide rail; 42. Sliding frame; 43. Electric gear; 44. Connecting plate; 45. Dual-axis motor; 46. Winding drum; 47. Multi-stage telescopic rod; 48. Buckle plate; 481. Stop block; 5. Feeding assembly; 51. Cylinder; 52. Mounting frame; 5 3. Dual-shaft motor II; 54. Sprocket; 55. Chain; 56. Push plate; 6. Cooling assembly; 61. Flow frame; 62. Conveying pipe; 63. Liquid 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 screen; 8. Filter screen assembly; 81. Electric push rod; 82. Connecting frame; 83. Filter frame. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1: An oil quenching furnace for heat treatment of metal workpieces, such as Figures 1-7 As shown, it includes:

[0040] The machine frame 1 has an oil-immersing frame 11 inside it. The oil-immersing frame 11 is located on the rear right side inside the machine frame 1 and is used to hold cooling oil and serve as a cooling place for the workpiece 100.

[0041] The support frame 2 is set at the front end of the machine frame 1 and can extend the front length of the machine frame 1 to facilitate the construction of the subsequent workpiece 100 conveying route.

[0042] Heating chamber 3 is located on the left side wall of machine frame 1, and the opening of heating chamber 3 communicates with machine frame 1. Placement platform 33 is built into heating chamber 3. The top of placement platform 33 has an interval branch plate structure, which serves as a placement platform for workpiece 100 that needs to be heat treated. Electric bidirectional lead screws 31 are symmetrically arranged on the left and right sides of the opening of heating chamber 3. A set of upper and lower spaced closing plates 32 are threaded between the lead screw bodies of electric bidirectional lead screws 31 on both sides. The closing plates 32 on both sides correspond to the threads on one side, so that the closing plates 32 can move relative to each other through the threads on the bidirectional lead screw bodies on both sides to realize the opening and closing operation, ensuring that heating chamber 3 can maintain a completely sealed state during operation.

[0043] A conveying assembly 4 for continuously conveying workpiece 100 includes an annular guide rail 41 fixedly disposed between the top of the machine frame 1 and the support frame 2. The bottom of the annular guide rail 41 has a serrated structure, and sliding frames 42 are arranged at intervals on the annular guide rail 41. An electric gear 43 is mounted on the sliding frame 42, meshing with the serrated structure of the annular guide rail 41. The electric gear 43 consists of a motor and a drive gear. The motor drives the drive gear to rotate and mesh with the serrated structure of the annular guide rail 41, thereby enabling the sliding frame 42 to move circumferentially along the annular guide rail 41, forming a complete movement trajectory of the workpiece 100 around the entire device. A connecting plate 44 is fixedly disposed at the bottom of the sliding frame 42. Winding devices are disposed on both the front and rear sides of the top of the connecting plate 44, and the rope ends of the winding devices on both sides are each connected to a... Each buckle plate 48 has an inwardly extending notch, and a stop block 481 with beveled sides is provided on the notch. By fastening the workpiece 100 between the notches of the two buckle plates 48, the workpiece 100 can be quickly assembled. Due to the setting of the stop block 481, it acts as a protruding obstruction at the notch, thereby effectively limiting the position of the workpiece 100 after assembly. At the same time, the beveled design of the stop block 481 facilitates the disassembly and assembly of the workpiece 100, making the operation simpler and faster. The bottom of the connecting plate 44 is provided with a multi-stage telescopic rod 47 covering the adjacent rope. The telescopic end of the multi-stage telescopic rod 47 is connected to the buckle plate 48 on the same side, which makes the lifting operation of the buckle plate 48 more stable. It provides additional guidance and support to the workpiece 100 from the multi-stage telescopic rod 47, ensuring the stability of the workpiece 100 during movement.

[0044] Specifically, through this circular conveying trajectory design, the workpiece 100 can proceed circumferentially from the entry device, through the heating chamber 3, and then to the oil immersion frame 11, achieving continuity and integrity of operation, effectively reducing dwell time and connection problems, and making the processing flow of the workpiece 100 simpler and more efficient.

[0045] The feeding assembly 5 is used to connect and transport the workpiece 100. The feeding assembly 5 includes a cylinder 51 set in the machine frame 1. A mounting frame 52 is connected to the telescopic end of the cylinder 51. A chain drive assembly is set in the mounting frame 52. A push plate 56 is set on the moving part of the chain drive assembly and slides with the mounting frame 52. The push plate 56 slides in the left and right direction. The push plate 56 presents a branch shape that is misaligned with the structure of the placement table 33, and the push plate 56 is located at the opening of the heating chamber 3.

[0046] Specifically, since the heating chamber 3 needs to maintain a sealed environment during operation, the workpiece 100 is transferred by controlling the lifting and lowering of the push plate 56 through the cylinder 51. First, cylinder 51 drives push plate 56 to rise, making it contact and lift workpiece 100, ensuring that workpiece 100 is freed from the restriction of buckle plate 48. Then, with the help of chain drive assembly, push plate 56 moves to the left, sending workpiece 100 into the opened heating chamber 3. After workpiece 100 has fully entered the heating chamber, cylinder 51 opens again and drives push plate 56 to descend a certain distance. Utilizing the misalignment design between push plate 56 and placement table 33, push plate 56 is embedded in the gap of placement table 33, thereby detaching from contact with workpiece 100. Finally, push plate 56 moves to the right and exits the heating chamber 3, closing plate 32 closes, allowing heat treatment of the securely placed workpiece 100. This enables seamless transfer of workpiece 100 from conveying assembly 4 to heating chamber 3, reducing unnecessary downtime and enabling the entire conveying process to be integrated into one device for operation. The next process can be carried out as soon as the required position is reached, improving the continuity and efficiency of the entire left and right process.

[0047] like Figure 4 and Figure 5 As shown, the winding device includes a dual-axis motor 45 located on the front and rear sides of the top of the connecting plate 44. A winding drum 46 is connected to each of the output ends of the dual-axis motor 45. A lifting rope is wound on each 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 drums 46, so that the multi-stage telescopic rods 47 are arranged around the connecting plate 44, and are respectively fitted around the perimeter of the adjacent lifting rope. The four-sided layout design of the multi-stage telescopic rods 47 ensures that the lifting rope can remain vertical and stable during operation, reducing instability caused by rope swinging or tilting, and improving the overall stability and safety of operation.

[0048] like Figure 6 and Figure 7 As shown, the chain drive assembly includes a dual-axis motor 53 mounted on a mounting frame 52. A set of spaced sprockets 54 are rotatably mounted on the front and rear sides of the mounting frame 52. The right sprockets 54 are connected to the output ends of the dual-axis motor 53, while the left sprockets 54 are connected by a coupling. A chain 55 is positioned between two sprockets 54 in the same group. The bottom of the push plate 56 is connected to the chains 55 on both sides. The dual-axis motor 53 precisely drives the right sprocket 54, and the chain 55 synchronously drives the left sprocket 54, ensuring the chain 55 rotates taut to maintain overall stable operation. This achieves precise positioning and movement control of the push plate 56, improving the accuracy of workpiece 100 conveying.

[0049] In use, first place the device on a stable support surface and check whether the internal components are operating normally, ensuring that the oil-immersed frame 11 is filled with sufficient cooling oil. Prepare the required number of workpieces 100 according to the processing needs, and then push them one by one between the front left buckle plates 48 of the support frame 2 to secure them. At this time, the winding equipment is in the initial state, that is, the multi-stage telescopic rod 47 has not extended or retracted; then, in this way, assemble the workpieces 100 one by one, and through the drive of 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 screw 31 drives the closing plate 32 to open, the heating chamber 3 opens accordingly, and the cylinder 51 starts, extending its telescopic end, causing the upper part to move upward, pushing the push plate 56 to contact and lift the workpiece 100, so that the workpiece 100 is released from the restriction of the buckle plate 48. The dual-axis motor 53 drives the sprocket 54 to rotate, and under the action of the chain 55, it drives the push plate 56 carrying the workpiece 100 to move to the left, so that the workpiece 100 moves smoothly out of the notch of the buckle plate 48 and is sent into the heating chamber 3 until the workpiece 100 is completely inside the heating chamber 3. Then, the cylinder 51 drives the whole to move down, and then the push plate 56 is embedded in the interval of the placement table 33, so that the workpiece 100 is freed from the contact restriction of the push plate 56 and placed on the placement table 33. Then the push plate 56 moves to the right and exits the heating chamber 3, and closes the closing plate 32 to start the heat treatment of the workpiece 100.

[0050] After the workpiece 100 is processed, according to the above operation, the height position of the push plate 56 is adjusted by the cylinder 51 so that the push plate 56 is flush with the placement table 33. Then, the above operation is repeated to drive the push plate 56 to move to the left into the heating chamber 3 and embed it into the placement table 33. Then, the cylinder 51 drives the push plate 56 to move up to lift the heat-treated workpiece 100 and remove the whole workpiece from the heating chamber 3. Then, the height position of the workpiece 100 is adjusted and it is re-fastened between the fasteners 48. The next processing step can be continued, so that the workpiece 100 moves clockwise along the annular guide rail 41 until it moves above the oil immersion frame 11. The dual-axis motor 45 is started to drive the winding drum 46 to rotate, causing the lifting rope to extend. Then, the multi-stage telescopic rod 47 extends adaptively, so that the workpiece 100 moves down and is immersed in the oil immersion frame 11 for cooling. After cooling is completed, the workpiece 100 is restored to the initial height, completing the entire heat treatment process.

[0051] Example 2: Based on Example 1, such as Figure 1 , Figure 8 and Figure 9As shown, it also includes a cooling assembly 6 disposed within the frame 1. The cooling assembly 6 includes three flow frames 61 stacked from bottom to top within the frame 1, corresponding to the upper, middle, and lower height positions of the oil immersion frame 11. The rear side of each flow frame 61 is connected to a delivery pipe 62 connected to the oil immersion frame 11. Each delivery pipe 62 is equipped with a liquid pump 63, and each flow frame 61 is provided with a circulation pipe 64 connected to the end of the corresponding delivery pipe 62. The circulation pipe 64 is in a serpentine 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.

[0052] like Figure 8 As shown, heat dissipation fins 641 are provided in the flow frame 61 to surround the corresponding circulation tube 64.

[0053] like Figure 8 and Figure 9 As shown, the cooling assembly 6 also includes ventilation frames 65 disposed on the front and rear sides of the flow frame 61. The ventilation frames 65 pass through the side wall of the frame 1, and the ends of the ventilation frames 65 are provided with filters 66. The front ventilation frames 65 are equipped with fan turbines 67 to accelerate airflow and push cold air to further improve the cooling effect.

[0054] Specifically, to ensure that the operating temperature of the oil inside the immersion frame 11 remains stable, a cooling component 6 is installed to maintain the oil temperature. The heated oil inside the immersion frame 11 is extracted by the pump 63. Due to the different heights of the delivery pipe 62, the oil at the upper, middle and lower heights of the immersion frame 11 is extracted accordingly to further improve the processing effect. The extracted oil flows through the delivery pipe 62 into the circulation frame 61, and then flows into the circulation pipe 64. At this time, the fan turbine 67 operates simultaneously and introduces cold air into the ventilation frame 65. The air flows from front to back, and the filter screen 66 simultaneously blocks impurities in the air. When the air flows over the heat dissipation fins 641, it quickly conducts the temperature to the circulation pipe 64. The heat is quickly carried away by the air flow, thereby cooling the oil in the circulation pipe 64. Finally, the cooled oil flows back into the immersion frame 11 through the end of the circulation pipe 64, achieving the cooling effect and ensuring the cooling effect of the workpiece 100.

[0055] like Figure 2 , Figure 10 and Figure 11As shown, it also includes a draining chamber 7 located on the right side of the frame 1. The draining chamber 7 is located in front of the oil immersion frame 11 and the two are connected. A support plate 72 is provided on the upper side wall of the draining chamber 7. An assembly frame 73 is tilted and rotated 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. A ventilation net 75 is installed on the opening of each compartment of the assembly frame 73 for airflow treatment. Contact frames 71 that 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 triangular in shape along the front and rear edges.

[0056] After 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 gradually contact the assembly frame 73. Since the contact frame 71 is designed in a triangular shape with a certain tilt angle, it pushes the assembly frame 73 and its internal components upwards upon contact, and tilts and rotates at a certain angle along the rotating end of the support plate 72. This causes the air outlet of the fan 74 to face the workpiece 100, ensuring that the airflow can cover the workpiece 100 that has just been taken out of the oil immersion frame 11. The airflow blows away the oil adhering to the surface of the workpiece 100, causing the oil to fall to the bottom of the draining chamber 7 and flow back into the oil immersion frame 11. As the contact frame 71 continues to move forward, the assembly frame 73 reaches its highest point and gradually detaches from the contact frame 71, beginning to gradually reset. Finally, the workpiece 100 is completely conveyed out of the device, completing the entire processing flow.

[0057] like Figure 2 , Figure 12 and Figure 13 As shown, it also includes a filter screen assembly 8 disposed on the upper side wall of the frame 1. The filter screen assembly 8 includes four electric push rods 81 disposed on the upper side wall of the frame 1, all of which are located above the oil immersion frame 11. A connecting frame 82 is disposed between the telescopic ends of the electric push rods 81. A filter frame 83 is fitted inside the connecting frame 82. The height adjustment of the connecting frame 82 and the filter frame 83 is controlled by the electric push rods 81, and 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 matter in the cooling oil after use, ensuring the purity of the oil. At the same time, the locking design of the connecting frame 82 and the filter frame 83 makes them detachable for subsequent maintenance.

[0058] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An oil quenching furnace for heat treatment of metal workpieces, comprising: Machine frame (1), wherein an oil-immersed frame (11) is built into the machine frame (1); A support frame (2) is provided at the front end of the machine frame (1); A heating chamber (3) is disposed on the side wall of the machine frame (1), and the heating chamber (3) has a built-in placement platform (33). Its characteristic is that it further includes: A conveying assembly (4) for continuously conveying workpieces (100) includes an annular guide rail (41) disposed between the top of the machine frame (1) and the support frame (2). The bottom of the annular guide rail (41) is provided with a serrated structure, and sliding frames (42) are arranged at intervals on the annular guide rail (41). An electric gear (43) that meshes with the serrated structure of the annular guide rail (41) is mounted on the sliding frame (42). A connecting plate (44) is provided at the bottom of the sliding frame (42). Winding devices are provided on both sides of the connecting plate (44). Each end of the rope of the winding devices on both sides is connected to a buckle plate (48). A multi-stage telescopic rod (47) covering the adjacent rope is provided 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. An inwardly extending notch is provided on the buckle plate (48), and a stop block (481) with inclined surfaces on both sides is provided on the notch. A feeding assembly (5) for connecting and conveying workpieces (100) includes a cylinder (51) disposed in the machine frame (1), a mounting frame (52) is connected to the telescopic end of the cylinder (51), a chain drive assembly is disposed in the mounting frame (52), and a push plate (56) that slides with the mounting frame (52) is disposed on the moving part of the chain drive assembly, and the push plate (56) is located at the opening of the heating chamber (3). It also includes a cooling assembly (6) disposed in the frame (1). The cooling assembly (6) includes a flow frame (61) stacked from bottom to top in the frame (1). One side of each flow frame (61) is connected to a delivery pipe (62) connected to the oil immersion frame (11). Each delivery pipe (62) is equipped with a liquid pump (63). Each flow frame (61) is provided with a circulation pipe (64) connected to the end of the corresponding delivery pipe (62). The end of the circulation pipe (64) is connected to the other side of the oil immersion frame (11). Each flow frame (61) is provided with heat dissipation fins (641) surrounding the corresponding circulation pipe (64). The cooling assembly (6) also includes ventilation frames (65) disposed on both sides of the flow frame (61). The ventilation frames (65) all pass through the side wall of the frame (1), and the ends of the ventilation frames (65) are all provided with filters (66). A wind turbine (67) is installed in one side of the ventilation frame (65). It also includes a draining chamber (7) set in the frame (1), the draining chamber (7) is located in front of the oil immersion frame (11) and the two are connected. A support plate (72) is provided on the upper side wall of the draining chamber (7), and an assembly frame (73) is tilted and rotated on the support plate (72). Fans (74) are installed at intervals in the assembly frame (73), and a ventilation net (75) is also installed on the assembly frame (73) for airflow processing. Contact frames (71) that contact and cooperate with the assembly frame (73) are provided on both sides of the sliding frame (42).

2. The oil quenching furnace for heat treatment of metal workpieces according to claim 1, characterized in that, The winding device includes a dual-axis motor (45) set on both sides of the top of the connecting plate (44). A winding drum (46) is connected to each of the output ends of the dual-axis motor (45). The multi-stage telescopic rod (47) is adapted to the layout of 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).

3. The oil quenching furnace for heat treatment of metal workpieces according to claim 2, characterized in that, The chain drive assembly includes a dual-axis motor (53) mounted on the mounting frame (52). A set of spaced sprockets (54) are rotatably mounted on the front and rear sides of the mounting frame (52). The right sprocket (54) is connected to the output ends of the dual-axis motor (53) at both ends, while the left sprockets (54) are connected by a connecting shaft. A chain (55) is provided between the two sprockets (54) in the same group. The bottom of the push plate (56) is connected to the chains (55) on both sides.

4. The oil quenching furnace for heat treatment of metal workpieces according to claim 3, characterized in that, It also includes a filter screen assembly (8) disposed on the upper side wall of the machine frame (1). The filter screen assembly (8) includes an electric push rod (81) disposed on the upper side wall of the machine frame (1). There are at least two electric push rods (81) and both are located above the oil immersion frame (11). A connecting frame (82) is disposed between the telescopic ends of the electric push rods (81). A filter frame (83) is fitted inside the connecting frame (82).

5. The oil quenching furnace for heat treatment of metal workpieces according to claim 4, characterized in that, The opening of the heating chamber (3) is symmetrically provided with electric bidirectional lead screws (31), and a set of closed plates (32) with vertical spacing are threaded between the lead screw bodies of the electric bidirectional lead screws (31) on both sides, and the closed plates (32) on both sides correspond to the threads on one side respectively.

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