High-toughness steel wire production quenching furnace and quenching process thereof

Abstract

The invention relates to the technical field of quenching, in particular to a high-toughness steel wire production quenching furnace and a quenching process thereof. The quenching furnace comprises a furnace body, a heating chamber and a cooling chamber are arranged in the furnace body, a blocking mechanism is arranged between the cooling chamber and the heating chamber, a conveying mechanism is arranged in the cooling chamber, a mounting frame is arranged at the bottom of the cooling chamber, and a quenching oil tank used for storing quenching oil is arranged in the mounting frame. A stirring mechanism and a reciprocating mechanism are arranged in the quenching oil tank; oil in the quenching oil tank flows through up-down reciprocating motion of the pressing plate, temperature layering of the upper layer and the lower layer of the oil is broken, heat exchange is promoted, the temperature of the oil is more uniform, when the pressing plate reciprocates up and down and ascends, the through holes are opened, the oil in the upper layer can smoothly pass through, and when the pressing plate descends, the through holes are closed. Therefore, the speed of oil in the lower layer flowing to the upper layer in the oil tank is increased, convection of oil in the quenching oil tank is more sufficient, and the temperature difference between the upper layer and the lower layer is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of quenching, and more specifically, to a quenching furnace for producing high-toughness steel wires and a quenching process thereof. Background Art

[0002] The lead-free environmentally friendly torsion bar oil-quenched special steel wire is a high-performance material, mainly used for key components such as automotive suspension systems and mechanical transmission systems. Its core performance requirements include high strength, high toughness, good fatigue performance, and environmental friendliness. To achieve these performances, quenching treatment is an essential process step, and the quenching furnace is the core equipment for realizing quenching treatment. It heats the steel wire and performs rapid cooling treatment by oil quenching, which changes the microstructure of the steel wire and forms a high-hardness martensite structure, thereby improving strength, hardness, and wear resistance.

[0003] At present, after the quenching furnace heats the steel wire, the steel wire will release a large amount of heat. Then, when these high-temperature steel wires are quickly placed into the fuel tank for oil quenching treatment, the heated steel wire will first contact the oil liquid in the upper part of the fuel tank. Since the temperature of the steel wire is much higher than that of the oil liquid, this temperature difference will cause the steel wire to quickly transfer heat to the oil liquid in contact first, resulting in a local increase in the temperature of the oil liquid in this area. This excessive local temperature of the oil liquid will lead to uneven cooling capacity of the quenching oil. The cooling speed of the contact part between the steel wire and the high-temperature oil liquid is slower, while the cooling speed of other parts may be normal or faster. This uneven cooling speed will affect the quenching effect of the steel wire and may lead to inconsistencies in hardness, hardening depth, and deformation. Summary of the Invention

[0004] The purpose of the present invention is to provide a quenching furnace for producing high-toughness steel wires and a quenching process thereof to solve the problems raised in the above background art.

[0005] To achieve the above purpose, one of the purposes of the present invention is to provide a quenching furnace for producing high-toughness steel wires, including a furnace body. A heating chamber and a cooling chamber are provided inside the furnace body. A blocking mechanism is provided between the cooling chamber and the heating chamber. A conveying mechanism is provided inside the cooling chamber. An installation frame is provided at the bottom of the cooling chamber, and a quenching fuel tank for storing quenching oil liquid is provided inside the installation frame;

[0006] A stirring mechanism and a reciprocating mechanism are provided inside the quenching fuel tank;

[0007] The stirring mechanism is used to increase the fluidity of the quenching oil liquid in the quenching fuel tank and accelerate the aggregation and precipitation of impurities in the quenching oil liquid;

[0008] The reciprocating mechanism is used to enhance the uniformity of the temperature of the quenching oil in the quenching oil tank and perform internal circulation cleaning and filtration on the quenching oil in the quenching oil tank, reducing the impurity content in the oil in contact with the steel wire;

[0009] The reciprocating mechanism includes a pressing plate, a connecting seat A, a connecting seat B, a plurality of filter frames and a plurality of mounting seats. A frame is formed between the plurality of filter frames and the plurality of mounting seats to limit the movement of the pressing plate;

[0010] One end of the connecting seat A is fixedly connected to the outer side of the pressing plate. An arc-shaped groove is formed on the outer side of the connecting seat A. A convex block is arranged on the inner side of the connecting seat, and the end of the convex block is attached to the inner side of the arc-shaped groove. When the connecting seat B rotates, the convex block abuts against the arc-shaped groove to drive the connecting seat A to drive the pressing plate to move up and down reciprocally, so as to strengthen the convection between the quenching oils.

[0011] As a further improvement of the technical solution, a plurality of through holes are formed in the pressing plate, and a connecting rod is rotatably connected between the inner sides of the plurality of through holes. A plurality of clamping plates are arranged on the outer sides of the plurality of connecting rods, and the plurality of clamping plates are respectively located inside the through holes, for adjusting the aperture of the through holes.

[0012] As a further improvement of the technical solution, both ends of the plurality of connecting rods are provided with connecting rods and connecting sleeves. Two key grooves are symmetrically formed on the outer side of the connecting rod. Two protrusions at one end of the connecting sleeve are respectively engaged with the inner sides of the two key grooves. The outer sides of the other ends of the connecting sleeves are rotatably connected with mounting shells. Limiting grooves are formed on both sides inside the mounting shells. A gear A is rotatably connected between the two limiting grooves inside the mounting shell, and one side of the gear A is fixedly connected to the end of the connecting sleeve. Two racks are engaged with the outer edge of the gear A. Blocks are fixedly connected to the vertical surfaces of the two racks. The other sides of the two racks are respectively slidably connected with the inner sides of the two limiting grooves. Memory springs are fixedly connected to the inner sides of the two limiting grooves, and the memory springs are respectively fixedly connected to the racks;

[0013] When the two blocks are pressed to push the two racks to move relatively, the gear A will be forced to pass through the connecting sleeve and the connecting rod, so that the clamping plate of the connecting rod flips at an angle inside the through hole.

[0014] As a further improvement of the technical solution, a plurality of sliding grooves are formed on the outer side of the mounting seat. The inner sides of the plurality of sliding grooves are respectively engaged with the outer sides of the plurality of connecting sleeves. One side of each of the plurality of sliding grooves communicates with an activity groove. Clamping strips are arranged on the left and right sides of the activity groove. First beveled blocks are arranged at the bottoms of the clamping strips. Second beveled blocks are arranged inside the activity groove above the first beveled blocks.

[0015] As a further improvement of the technical solution, the stirring mechanism includes a driving motor A and a support frame. The driving motor A is installed at the bottom of the quenching oil tank, and the end of the output shaft of the driving motor A penetrates through the interior of the quenching oil tank and is fixedly connected with a vortex fan.

[0016] As a further improvement of the technical solution, the bottom end of the support frame is fixedly connected to the inner bottom of the quenching oil tank. An internal gear seat is rotatably connected between the inner ends of the support frame. The upper surface of the internal gear seat is fixedly connected to the bottom end of the connecting seat B. A gear B is arranged inside the internal gear seat. The bottom end of the gear B is fixedly connected to a support rod. The bottom end of the support rod penetrates through the inner wall of the support frame and is fixedly connected to the top end of the vortex fan. The outer edge of the gear B meshes with a gear C. The bottom end of the gear C is fixedly connected to a rotating rod. The bottom end of the rotating rod is rotatably connected to the upper surface of the support frame, and the outer edge of the gear C meshes with the inner edge of the internal gear seat.

[0017] As a further improvement of the technical solution, support plates are arranged on both sides of the quenching oil tank. A lifting cylinder is fixedly connected to the upper surface of the support plate. The output end of the lifting cylinder is fixedly connected to a connecting frame. A rocker is arranged inside the connecting frame. The outer side of the rocker is rotatably connected to a support seat. The bottom end of the support seat is fixedly connected to the upper surface of the quenching oil tank. The other end of the rocker is provided with a bearing frame. Limiting sliding grooves are formed on both sides of the bearing frame, and the two limiting sliding grooves are respectively slidably connected to the ends of the two rockers.

[0018] As a further improvement of the technical solution, a plurality of limiting rods are slidably connected between the inner walls of the bearing frame and the pressing plate. The top ends of the plurality of limiting rods are fixedly connected to a limiting block. The bottom ends of the limiting rods are all fixedly connected to a support block, and the outer sides of the support blocks are all fixedly connected to the outer side of the mounting seat.

[0019] As a further improvement of the technical solution, the blocking mechanism includes a connecting shell. The connecting shell communicates with the interior of the furnace body between the heating chamber and the cooling chamber. Two telescopic cylinders A are symmetrically and fixedly connected to the top end of the connecting shell. The output ends of the two telescopic cylinders A penetrate through the interior of the connecting shell and are fixedly connected to a heat insulation door;

[0020] The conveying mechanism includes a mounting frame, and two cross bars are symmetrically arranged inside the mounting frame. A threaded rod is rotatably connected inside the mounting frame between the two cross bars. A driving motor B is fixedly installed on one side of the mounting frame. The output shaft of the driving motor B penetrates through the inner wall of the mounting frame and is fixedly connected to one end of the threaded rod. An installation block is threadedly connected to the outer side of the threaded rod. The inner side of the installation block is slidably connected to the outer sides of the two cross bars respectively. A telescopic cylinder B is arranged at the bottom of the installation block. The end of the telescopic cylinder B is fixedly connected to a connecting seat C. Two electric push rods are installed inside the connecting seat C. A forklift is connected between the ends of the two electric push rods. A placing rack is erected above the bearing rack below the forklift.

[0021] The second object of the present invention is to provide a quenching process for a quenching furnace for producing high-toughness steel wires, including the following method steps:

[0022] S1. First, place the steel wire to be quenched in the placing rack, and then start the telescopic cylinder A to drive the heat-insulating door to contract into the interior of the connecting shell, so that the cooling chamber and the heating chamber are in a communicating state. Secondly, when the forklift is below the horizontal level of the placing rack, then through the contraction of the telescopic cylinder B, the forklift drives the steel wire in the placing rack to a high position. Then start the driving motor B, so that the installation block drives the placing rack towards the heating chamber through the forklift. By starting the electric push rod, the placing rack is pushed onto the placing table inside the heating chamber. Subsequently, the electric push rod drives the forklift to move out of the interior of the heating chamber, and then close the heat-insulating door. Then the steel wire in the placing rack can be heated inside the heating chamber. After the heating work is completed, open the heat-insulating door, drive the forklift through the electric push rod to move the placing rack out of the heating chamber and return to the cooling chamber. Then, through the installation block, the forklift drives the placing rack to be erected on the upper surface of the bearing rack again, and then the forklift can be separated from the placing rack.

[0023] S2. When the steel wire in the placing rack is re-erected on the upper surface of the bearing rack after heating, start the lifting cylinder to drive the connecting frame to rise. When the connecting frame rises, one end of the rocker will adaptively shift along the inner side of the connecting frame, so that the rocker rotates around the support seat. Then the other end of the rocker will drive the bearing rack to move down into the quenching oil tank through the limiting chute. While the bearing rack descends, it will synchronously drive the steel wire in the placing rack to move down into the quenching oil tank, so that the steel wire contacts the oil in the quenching oil tank to perform oil quenching work.

[0024] S3. Subsequently, start the drive motor A to drive the vortex fan to rotate and stir below the inside of the quenching oil tank, thereby generating a certain centrifugal force. Then, under the action of the centrifugal force, the oil in the quenching oil tank starts to flow, causing the oil in the quenching oil tank to move in an approximate circular motion. The impurities dispersed in the oil will also move along with the oil flow, causing the impurities to gather towards the stirring center of the vortex fan. During the gathering process, the impurities will collide with each other, making it easier for the smaller impurity particles to aggregate into larger particles. The larger particles are then more likely to precipitate at the bottom of the quenching oil tank under the action of gravity.

[0025] S4. Then, while the connecting seat B is rotating, the end of the convex block inside the connecting seat B fits with the arc-shaped groove on the outside of the connecting seat A, causing the connecting seat A to drive the pressing plate to move up and down reciprocally. During the downward movement of the pressing plate, the through-hole is in a closed state, thereby increasing the pressure of the oil at the lower part inside the quenching oil tank when the pressing plate moves downward. Under the influence of the pressure, the oil at the lower part inside the quenching oil tank will flow through the filter frame to the upper part of the quenching oil tank for heat exchange, making the oil temperature more uniform. The filter frame will directly intercept the impurities in the oil for filtration, preventing them from flowing with the oil and contacting the steel wire. When the pressing plate rises, the through-hole is in an open state. Then, as the pressing plate rises, the oil in the quenching oil tank will flow through the through-hole to the lower layer, and the impurities carried in the upper-layer oil will also flow through the through-hole to the lower layer, thereby reducing the impurities contained in the oil in contact with the steel wire in the upper layer of the quenching oil tank.

[0026] S5. Subsequently, after the steel wire quenching is completed, start the lifting cylinder to drive the connecting frame to descend. When the connecting frame descends, one end of the rocker will adaptively shift along the inside of the connecting frame, causing the rocker to rotate in the opposite direction with the support seat as the center. At this time, the other end of the rocker drives the carrier frame to return to the inside of the cooling chamber again. When the carrier frame drives the placement frame, after a period of idling, the oil stains on the surface of the oil-quenched steel wire can drip back into the quenching oil tank through the gap between the placement frame and the carrier frame. After all the work is completed, the furnace door can be opened to take out the quenched steel wire.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. The reciprocating movement of the pressing plate makes the oil in the quenching oil tank flow, breaking the temperature stratification between the upper and lower layers of the oil, promoting heat exchange, making the oil temperature more uniform. When the pressing plate moves up and down reciprocally, the through-hole opens when rising, allowing the upper-layer oil to flow smoothly through. When descending, the through-hole closes, thereby increasing the flow rate of the lower-layer oil in the oil tank to the upper layer, making the convection of the oil in the quenching oil tank more sufficient, and further reducing the temperature difference between the upper and lower layers.

[0029] 2. The impurity in the oil can be directly intercepted through the set filtering framework. When the pressing plate descends to close the through-hole, the pressure of the lower-layer oil in the fuel tank will increase. And due to the closing of the through-hole, the lower-layer oil in the fuel tank can only flow to the upper layer of the fuel tank through the filtering frame for convection, and then the oil is filtered through the filtering frame, thereby reducing the impurity content in the oil, further reducing the contact between the impurities in the oil and the steel wire, and protecting the surface finish of the steel wire during oil quenching.

[0030] 3. The up-and-down movement of the pressing plate makes the oil form a regular flow change, so that the oil in the quenching fuel tank can pass through the filtering framework more evenly, realizing multiple cycle filtrations. When rising, the through-hole opens, and the upper-layer oil in the fuel tank flows to the lower layer through the through-hole with impurities. When descending, the through-hole closes, pushing the oil to flow through the outside of the filtering frame, making the filtration more sufficient, thus forming the effect of cycle filtration and ensuring the quality of the oil in contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 is a schematic diagram of the overall structure of another perspective of the present invention;

[0033] Figure 3 is a schematic diagram of the internal structure of the cooling chamber of the present invention;

[0034] Figure 4 is a schematic diagram of the structure of the stirring mechanism of the present invention;

[0035] Figure 5 is a schematic diagram of the structure of the lifting mechanism of the present invention;

[0036] Figure 6 is a schematic diagram of the internal structure of the quenching fuel tank of the present invention;

[0037] Figure 7 is a schematic diagram of the cooperation between the reciprocating mechanism and the internal gear seat structure of the present invention;

[0038] Figure 8 is a schematic diagram of the structure of the reciprocating mechanism of the present invention;

[0039] Figure 9 is a schematic diagram of the stirring drive structure of the present invention;

[0040] Figure 10 is a schematic diagram of the deceleration structure of the present invention;

[0041] Figure 11 is a three-dimensional structure schematic diagram of the pressing plate of the present invention;

[0042] Figure 12 is a schematic diagram of the internal cross-sectional structure distribution of the mounting seat of the present invention;

[0043] Figure 13 Schematic diagram of the reciprocating component structure of the present invention;

[0044] Figure 14 Schematic diagram of the extension structure of the present invention;

[0045] Figure 15 Schematic diagram of the conveyor mechanism structure of the present invention

[0046] The meanings of each label in the figure are as follows:

[0047] 1. Furnace body; 101. Heating chamber; 102. Cooling chamber; 103. Installation frame; 104. Quenching oil tank; 2. Stirring mechanism; 201. Driving motor A; 202. Support frame; 203. Scroll fan; 3. Reciprocating mechanism; 31. Pressing plate; 301. Through hole; 302. Connecting rod; 3021. Connecting rod; 3022. Connecting sleeve; 3023. Keyway; 3024. Installation shell; 3025. Limiting groove; 3026. Gear A; 3027. Rack; 3028. Block; 3029. Memory spring; 303. Clamping plate; 32. Connecting seat A; 33. Connecting seat B; 34. Filter frame; 35. Installation seat; 351. Sliding groove; 352. Movable groove; 353. Card strip; 354. First beveled cut block; 355. Second beveled cut block; 36. Arc groove; 4. Internal gear seat; 41. Gear B; 42. Support rod; 43. Gear C; 44. Rotating rod; 5. Support plate; 51. Lifting cylinder; 52. Connecting frame; 53. Rocker; 54. Support seat; 55. Carrying frame; 56. Limiting sliding groove; 6. Limiting rod; 61. Limiting block; 62. Support block; 7. Blocking mechanism; 71. Connecting shell; 72. Telescopic cylinder A; 73. Heat insulation door; 8. Conveyor mechanism; 801. Installation frame; 802. Cross bar; 803. Threaded rod; 804. Driving motor B; 805. Installation block; 806. Telescopic cylinder B; 807. Connecting seat C; 808. Electric push rod; 809. Fork; 810. Placing rack. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0051] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 11 , Figure 12 Figure 13 , and Figure 14 As shown in

[0052] , the purpose of one of the embodiments of the present invention is to provide a quenching furnace for producing high-toughness steel wires, which includes a furnace body 1. Inside the furnace body 1, there are a heating chamber 101 and a cooling chamber 102. A barrier mechanism 7 is provided between the cooling chamber 102 and the heating chamber 101. Inside the cooling chamber 102, there is a conveying mechanism 8. At the bottom of the cooling chamber 102, there is an installation frame 103. Inside the installation frame 103, there is a quenching oil tank 104 for storing quenching oil;

[0053] Inside the quenching oil tank 104, there are a stirring mechanism 2 and a reciprocating mechanism 3;

[0054] The stirring mechanism 2 is used to increase the fluidity of the quenching oil in the quenching oil tank 104 and accelerate the aggregation and precipitation of impurities in the quenching oil;

[0055] The reciprocating mechanism 3 includes a pressure plate 31, a connecting seat A 32, a connecting seat B 33, a plurality of filter frames 34 and a plurality of mounting seats 35. A frame is formed between the plurality of filter frames 34 and the plurality of mounting seats 35 to limit the movement of the pressure plate 31;

[0056] One end of the connecting seat A 32 is fixedly connected to the outer side of the pressure plate 31. An arc-shaped groove 36 is formed on the outer side of the connecting seat A 32. A convex block is arranged on the inner side of the connecting seat, and the end of the convex block is attached to the inner side of the arc-shaped groove 36. When the connecting seat B 33 rotates, the convex block abuts against the arc-shaped groove 36 to drive the connecting seat A 32 to drive the pressure plate 31 to move up and down reciprocally, so as to strengthen the convection between the quenching oil liquids;

[0057] A plurality of through holes 301 are formed in the pressure plate 31, and a connecting rod 302 is rotatably connected between the inner sides of the plurality of through holes 301. A plurality of clamping plates 303 are arranged on the outer sides of the plurality of connecting rods 302, and the plurality of clamping plates 303 are respectively located inside the through holes 301 to adjust the aperture of the through holes 301;

[0058] Both ends of the plurality of connecting rods 302 are provided with connecting rods 3021 and connecting sleeves 3022. Two key grooves 3023 are symmetrically formed on the outer side of the connecting rod 3021. Two protrusions at one end of the connecting sleeve 3022 are respectively engaged with the inner sides of the two key grooves 3023. Mounting shells 3024 are rotatably connected to the outer sides of the other ends of the connecting sleeves 3022. Limiting grooves 3025 are formed on both sides inside the mounting shells 3024. A gear A 3026 is rotatably connected inside the mounting shells 3024 between the two limiting grooves 3025, and one side of the gear A 3026 is fixedly connected to the end of the connecting sleeve 3022. Two racks 3027 are engaged with the outer edge of the gear A 3026. Two abutting blocks 3028 are fixedly connected to the vertical planes of the two racks 3027. The other sides of the two racks 3027 are respectively slidably connected to the inner sides of the two limiting grooves 3025. Memory springs 3029 are fixedly connected to the inner sides of the two limiting grooves 3025, and the memory springs 3029 are respectively fixedly connected to the racks 3027;

[0059] When the two abutting blocks 3028 are pressed to push the two racks 3027 to move relatively, the gear A 3026 will be stressed to pass through the connecting sleeve 3022 and the connecting rod 3021, so that the clamping plates 303 of the connecting rod 302 are angularly flipped inside the through hole 301;

[0060] A plurality of sliding grooves 351 are formed on the outer side of the mounting seat 35. The outer sides of the plurality of connecting sleeves 3022 are respectively engaged with the inner sides of the plurality of sliding grooves 351. One sides of the plurality of sliding grooves 351 are communicated with an activity groove 352. Clamping strips 353 are arranged on the left and right sides of the activity groove 352. First beveled cut blocks 354 are arranged at the bottoms of the clamping strips 353. Second beveled cut blocks 355 are arranged inside the activity groove 352 above the first beveled cut blocks 354;

[0061] Support plates 5 are arranged on both sides of the quenching oil tank 104. A lifting cylinder 51 is fixedly connected to the upper surface of the support plate 5. The output end of the lifting cylinder 51 is fixedly connected to a connecting frame 52. A rocker 53 is arranged inside the connecting frame 52. A support seat 54 is rotatably connected to the outer side of the rocker 53. The bottom end of the support seat 54 is fixedly connected to the upper surface of the quenching oil tank 104. The other end of the rocker 53 is provided with a bearing frame 55. Limiting chutes 56 are opened on both sides of the bearing frame 55, and the two limiting chutes 56 are respectively slidably connected to the ends of the two rockers 53.

[0062] In this implementation, when the steel wire in the placement rack 810 is re-erected on the upper surface of the bearing frame 55 after heating is completed, the lifting cylinder 51 is started to drive the connecting frame 52 to rise. When the connecting frame 52 rises, one end of the rocker 53 will adaptively shift along the inner side of the connecting frame 52, so that the rocker 53 rotates around the support seat 54. At this time, the other end of the rocker 53 will drive the bearing frame 55 to move down into the quenching oil tank 104 through the limiting chute 56. While the bearing frame 55 descends, it will synchronously drive the steel wire in the placement rack 810 to move down into the quenching oil tank 104, so that the steel wire contacts the oil in the quenching oil tank 104 to perform oil quenching work. And while the bearing frame 55 moves down, through the limitation of the limiting rod 6, it is used to ensure the stability of the bearing frame 55 during the descending process;

[0063] Then, through the rotation of the connecting seat B33, while the connecting seat B33 is rotating, the end of the convex block inside the connecting seat B33 fits with the arc-shaped groove 36 on the outside of the connecting seat A32. As a result, the connecting seat A32 synchronously drives the pressing plate 31 to move up and down reciprocally along the inside of the connecting seat B33. When the pressing plate 31 moves downward, it drives the connecting sleeve 3022 to move downward synchronously along the inside of the sliding groove 351 through the connecting rod 3021. Then, when the connecting sleeve 3022 moves downward, it synchronously drives the mounting shell 3024 to move downward along one side inside the movable groove 352. During the downward movement of the mounting shell 3024, the two abutting blocks 3028 will contact the two clamping strips 353. As a result, the two abutting blocks 3028 will be forced to contract into the inside of the mounting shell 3024 under the resistance of the clamping strips 353. While the two abutting blocks 3028 are contracting into the inside of the mounting shell 3024, the two memory springs 3029 are synchronously stressed and compressed, and the two racks 3027 will mesh with the gear A3026, causing the gear A3026 to rotate. Then, when the gear A3026 rotates, it will cause the connecting sleeve 3022 to drive the connecting rod 302 to rotate through the connecting rod 3021. While the connecting rod 302 is rotating, it will drive a number of clamping plates 303 on the outside of the connecting rod 302 to respectively flip synchronously within the through-hole 301 of the pressing plate 31. When the pressing plate 31 moves downward, the through-hole 301 is in a closed state. As a result, when the pressing plate 31 moves downward, the pressure of the oil at the lower part inside the quenching oil tank 104 increases. Under the influence of the pressure, the oil at the lower part inside the quenching oil tank 104 will flow through the filter frame 34 to the upper part of the quenching oil tank 104 for heat exchange, making the oil temperature more uniform and avoiding the situation where there is a too large local temperature difference in the oil inside the quenching oil tank 104 when the steel wire is oil quenched in the quenching oil tank 104. This causes the oil at the upper and lower parts inside the quenching oil tank 104 to conduct convection, thereby promoting the heat of the oil on the upper and lower sides. The filter frame 34 will directly intercept the impurities in the oil and filter them to prevent them from flowing with the oil and contacting the steel wire;

[0064] When the installation shell 3024 drops to a certain extent, it will come into contact with the inclined plane of the first inclined cutting block 354. Subsequently, under the influence of the inclined plane of the first inclined cutting block 354, the installation shell 3024 will adaptively move along the inclined plane of the first inclined cutting block 354 to fit with the other side of the movable slot 352. At this time, the two abutting blocks 3028 will lose the resistance of the latch 353. Subsequently, the two racks 3027 are pushed back to their initial positions by the elastic force of the memory spring 3029. And while the two racks 3027 are reset, they will drive the connecting rod 3021 through the gear A3026 by meshing with the gear A3026, so that the connecting rod 3021 drives the clamping plate 303 to flip inside the through hole 301 through the connecting rod 302, making the through hole 301 in an open and closed state. Then, with the rise of the pressing plate 31, the oil in the quenching oil tank 104 will flow to the lower layer through the through hole 301, and the impurities carried in the upper layer of the oil will also flow to the lower layer through the through hole 301, so as to reduce the impurities contained in the oil in contact with the steel wire in the upper layer of the quenching oil tank 104. And while the pressing plate 31 rises, the installation shell 3024 will also rise synchronously. And when the installation shell 3024 rises to a certain extent, it will come into contact with the inclined plane of the second inclined cutting block 355. Subsequently, under the influence of the inclined plane of the second inclined cutting block 355, the installation shell 3024 will move back above the ends of the two latches 353, thus completing the reciprocating work of the pressing plate 31 up and down, waiting for the next reciprocating work. Thus, through the up and down movement of the pressing plate 31, the oil forms a regular flow change, so that the oil in the quenching oil tank 104 can pass through the filter frame 34 more evenly, thus forming a circulating filtration effect, so as to increase the uniformity of the oil flow in the quenching oil tank 104, prevent the occurrence of a large local temperature, and ensure the quality of the oil in contact with the steel wire.

[0065] In this embodiment, as Figure 6 , Figure 9 and Figure 10 shown, the stirring mechanism 2 includes a driving motor A201 and a support frame 202. The driving motor A201 is installed at the bottom of the quenching oil tank 104, and the end of the output shaft of the driving motor A201 penetrates through the inside of the quenching oil tank 104 and is fixedly connected with a vortex fan 203;

[0066] The bottom end of the support frame 202 is fixedly connected to the inner bottom of the quenching oil tank 104. A internal gear seat 4 is rotatably connected between the inner ends of the support frame 202. The upper surface of the internal gear seat 4 is fixedly connected to the bottom end of the connecting seat B33. A gear B41 is provided inside the internal gear seat 4. The bottom end of the gear B41 is fixedly connected to a support rod 42. The bottom end of the support rod 42 penetrates through the inner wall of the support frame 202 and is fixedly connected to the top end of the vortex fan 203. The outer edge of the gear B41 meshes with a gear C43. The bottom end of the gear C43 is fixedly connected to a rotating rod 44. The bottom end of the rotating rod 44 is rotatably connected to the upper surface of the support frame 202, and the outer edge of the gear C43 meshes with the inner edge of the internal gear seat 4.

[0067] In this embodiment, by starting the drive motor A201, the vortex fan 203 is driven to rotate and stir below the inside of the quenching oil tank 104, thereby generating a certain centrifugal force. Subsequently, under the action of the centrifugal force, the oil liquid in the quenching oil tank 104 starts to flow, making the oil liquid in the quenching oil tank 104 perform an approximate circular motion. And the impurities dispersed in the oil liquid will also move along with the oil flow, causing the impurities to gather towards the stirring center of the vortex fan 203. And during the gathering process, the impurities will collide with each other, making the smaller particles of impurities easily aggregate into larger particles. And the increased particles are more likely to precipitate at the bottom of the quenching oil tank 104 under the action of gravity. Thus, by the rotation and stirring of the vortex fan 203, to a certain extent, it plays a role in increasing the fluidity of the oil liquid in the quenching oil tank 104 and accelerating the aggregation and precipitation of impurities in the oil liquid. And while the vortex fan 203 is rotating, it will also drive the gear B41 to rotate synchronously through the support rod 42. When the gear B41 rotates, it meshes with the gear C43, and then makes the gear C43 rotate synchronously. When the gear C43 rotates, it meshes with the inner edge of the gear seat and then drives the gear seat to rotate. And when the gear seat rotates, by switching the tooth number ratio between the gear B41 and the gear C43, the gear seat can drive the connecting seat B33 to rotate at a speed lower than that of the gear C43.

[0068] In this embodiment, as Figure 3 and Figure 15 shown, a plurality of limiting rods 6 are slidably connected between the inner walls of the carrier frame 55 and the pressing plate 31. The top ends of the plurality of limiting rods 6 are fixedly connected to a limiting block 61. The bottom ends of the limiting rods 6 are all fixedly connected to a support block 62, and the outer sides of the support blocks 62 are all fixedly connected to the outer side of the mounting seat 35;

[0069] The blocking mechanism 7 includes a connecting shell 71. The connecting shell 71 is communicated with the inside of the furnace body 1 between the heating chamber 101 and the cooling chamber 102. Two telescopic cylinders A72 are symmetrically and fixedly connected to the top of the connecting shell 71. The output ends of the two telescopic cylinders A72 penetrate through the inside of the connecting shell 71 and are fixedly connected to a heat insulation door 73;

[0070] The conveying mechanism 8 includes a mounting frame 801. Two cross bars 802 are symmetrically arranged on the inner side of the mounting frame 801. A threaded rod 803 is rotatably connected between the two cross bars 802 on the inner side of the mounting frame 801. A driving motor B804 is fixedly installed on one side of the mounting frame 801. The output shaft of the driving motor B804 penetrates through the inner wall of the mounting frame 801 and is fixedly connected to one end of the threaded rod 803. A mounting block 805 is threadedly connected to the outer side of the threaded rod 803. The inner side of the mounting block 805 is respectively slidably connected to the outer sides of the two cross bars 802. A telescopic cylinder B806 is arranged at the bottom of the mounting block 805. The end of the telescopic cylinder B806 is fixedly connected to a connecting seat C807. Two electric push rods 808 are installed inside the connecting seat C807. A forklift 809 is connected between the ends of the two electric push rods 808. A placement rack 810 is erected above the carrier 55 below the forklift 809.

[0071] In this implementation, first, the placement rack 810 is initially placed on the upper surface of the bearing rack 55 inside the cooling chamber 102. Subsequently, during use, the furnace door at the cooling chamber 102 is opened, and the steel wire to be quenched is placed in the placement rack 810. Then, the telescopic cylinder A72 is activated to drive the heat insulation door 73 to contract into the interior of the connection housing 71, putting the cooling chamber 102 and the heating chamber 101 in a communicating state. Secondly, by activating the telescopic cylinder B806 to extend, the connecting seat C807 drives the forklift 809 below the horizontal level of the placement rack 810 through the electric push rod 808. Subsequently, by activating the drive motor 804 to drive the threaded rod 803 to rotate, when the threaded rod 803 rotates, it drives the forklift 809 to slide along the outer edges of the two crossbars 802 through the mounting block 805. When the forklift 809 moves below the placement rack 810, through the contraction of the telescopic cylinder B806, the forklift 809 drives the placement rack 810 and the steel wire in the placement rack 810 to a high position. Then, the drive motor B804 is continued to be activated, so that the mounting block 805 drives the placement rack 810 towards the heating chamber 101 through the forklift 809. When the placement rack 810 is located at the communicating position between the cooling chamber 102 and the heating chamber 101, by activating the electric push rod 808, the electric push rod 808 pushes the forklift 809, and the forklift 809 drives the placement rack 810 to continue moving onto the placement table in the heating chamber 101. When moving above the placement rack 810, the forklift 809 is driven to descend through the telescopic cylinder B806, thereby placing the placement rack 810 on the placement table in the heating chamber 101. Then, by driving the threaded rod 803 to rotate in the reverse direction through the drive motor B, the forklift 809 is moved out of the heating chamber 101. Then, the heat insulation door 73 is driven to move downward by the telescopic cylinder A72 to complete the closing work of the heating chamber 101. Subsequently, the steel wire in the placement rack 810 can be heated inside the heating chamber 101. After the heating work is completed, by opening the heat insulation door 73, the mounting block 805 drives the placement rack 810 to be re-placed on the upper surface of the bearing rack 55 through the forklift 809. Then, through the continuous movement of the mounting block 805, the forklift 809 is separated from the placement rack 810.

[0072] The second objective of this embodiment is to provide a quenching process for a quenching furnace for producing high-toughness steel wire, including the following method steps:

[0073] S1. First, place the steel wire to be quenched in the placement rack 810. Then, start the telescopic cylinder A72 to drive the heat-insulating door 73 to contract into the interior of the connection housing 71, so that the cooling chamber 102 and the heating chamber 101 are in a communicating state. Secondly, when the forklift 809 is below the horizontal level of the placement rack 810, then, by the contraction of the telescopic cylinder B806, the forklift 809 drives the steel wire in the placement rack 810 to a high position. Then, start the drive motor B804, so that the mounting block 805 drives the placement rack 810 through the forklift 809 and moves towards the heating chamber 101. By starting the electric push rod 808, the placement rack 810 is pushed onto the placement table in the heating chamber 101. Subsequently, the electric push rod 808 drives the forklift 809 to move out of the interior of the heating chamber 101. Then, close the heat-insulating door 73. Subsequently, the steel wire in the placement rack 810 can be heated inside the heating chamber 101. After the heating work is completed, open the heat-insulating door 73. Drive the forklift 809 through the electric push rod 808 to move the placement rack 810 out of the heating chamber 101 and return it to the cooling chamber 102. Then, through the mounting block 805, the forklift 809 drives the placement rack 810 to be re-mounted on the upper surface of the bearing rack 55. Then, separate the forklift 809 from the placement rack 810;

[0074] S2. When the steel wire in the placement rack 810 is re-mounted on the upper surface of the bearing rack 55 after heating, start the lifting cylinder 51 to drive the connecting frame 52 to rise. When the connecting frame 52 rises, one end of the rocker 53 will adaptively shift along the inner side of the connecting frame 52, so that the rocker 53 rotates around the support seat 54. Then, the other end of the rocker 53 will drive the bearing rack 55 to move down into the quenching oil tank 104 through the limit sliding groove 56. While the bearing rack 55 descends, it will synchronously drive the steel wire in the placement rack 810 to move down into the quenching oil tank 104, so that the steel wire contacts the oil in the quenching oil tank 104 to perform oil quenching work;

[0075] S3. Subsequently, start the drive motor A201 to drive the vortex fan 203 to rotate and stir below the interior of the quenching oil tank 104, so as to generate a certain centrifugal force. Then, under the action of the centrifugal force, the oil in the quenching oil tank 104 starts to flow, making the oil in the quenching oil tank 104 move in an approximate circular motion. And the impurities dispersed in the oil will also move along with the oil flow, making the impurities gather towards the stirring center of the vortex fan 203. And during the gathering process, the impurities will collide with each other, making the smaller particles of impurities easily aggregate into larger particles. And the increased particles are more likely to precipitate at the bottom of the quenching oil tank 104 under the action of gravity.

[0076] S4. Then, while the connecting seat B33 is rotating, the end of the convex block inside the connecting seat B33 fits with the arc-shaped groove 36 on the outside of the connecting seat A32, so that the connecting seat A32 drives the pressing plate 31 to move up and down reciprocally. When the pressing plate 31 moves downward, the through hole 301 is in a closed state. Thus, when the pressing plate 31 moves downward, the pressure of the oil fluid below inside the quenching oil tank 104 increases. Under the influence of the pressure, the oil fluid below inside the quenching oil tank 104 will flow through the filter frame 34 to the upper part of the quenching oil tank 104 for heat exchange, making the temperature of the oil fluid more uniform. The filter frame 34 will directly intercept the impurities in the oil fluid to filter them and prevent them from flowing with the oil fluid to contact the steel wire. When the pressing plate 31 moves upward, the through hole 301 is in an open state. Then, as the pressing plate 31 moves upward, the oil fluid inside the quenching oil tank 104 will flow to the lower layer through the through hole 301, and the impurities carried in the upper layer of the oil fluid will also flow to the lower layer through the through hole 301, thereby reducing the impurities contained in the oil fluid in contact with the steel wire in the upper layer of the quenching oil tank 104.

[0077] S5. Subsequently, after the steel wire quenching is completed, start the lifting cylinder 51 to drive the connecting frame 52 to descend. When the connecting frame 52 descends, one end of the rocker 53 will adaptively shift along the inside of the connecting frame 52, so that the rocker 53 rotates in the opposite direction with the support seat 54 as the center. At this time, the other end of the rocker 53 drives the bearing frame 55 to return to the inside of the cooling chamber 102 again. And when the bearing frame 55 drives the placement frame 810, after a period of vacancy, the oil stains on the surface of the steel wire after oil quenching can drip back into the quenching oil tank 104 through the gap between the placement frame 810 and the bearing frame 55. Then, after all the work is completed, the furnace door can be opened to take out the quenched steel wire.

[0078] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A quenching furnace for producing high-toughness steel wire, comprising a furnace body, a heating chamber and a cooling chamber are arranged inside the furnace body, a blocking mechanism is arranged between the cooling chamber and the heating chamber, and a conveying mechanism is arranged inside the cooling chamber, characterized in that: A mounting frame is provided at the bottom of the cooling chamber, and a quenching oil tank for storing quenching oil is provided inside the mounting frame; The quenching oil tank is provided with a stirring mechanism and a reciprocating mechanism inside; The stirring mechanism is used to increase the fluidity of the quenching oil in the quenching oil tank and accelerate the aggregation and precipitation of impurities in the quenching oil; The reciprocating mechanism is used to enhance the uniformity of the temperature of the quenching oil in the quenching oil tank and to perform internal circulation, cleaning and filtering of the quenching oil in the quenching oil tank, thereby reducing the impurity content in the oil in contact with the steel wire; The reciprocating mechanism includes a pressing plate, a connecting seat A, a connecting seat B, a plurality of filter frames and a plurality of mounting seats, wherein a frame is formed between the plurality of filter frames and the plurality of mounting seats to limit the movement of the pressing plate; One end of the connecting seat A is fixedly connected to the outer side of the pressure plate, an arc-shaped groove is provided on the outer side of the connecting seat A, a protrusion is provided on the inner side of the connecting seat, and the end of the protrusion is in contact with the inner side of the arc-shaped groove. When the connecting seat B rotates, the protrusion contacts the arc-shaped groove to drive the connecting seat A to drive the pressure plate to move back and forth up and down, so as to enhance the convection between the quenching oil.

2. A high-toughness steel wire production quenching furnace according to claim 1, characterized in that: The pressure plate is provided with a plurality of through holes, and connecting rods are rotatably connected between the inner sides of the plurality of through holes, and a plurality of clamping plates are provided on the outer sides of the plurality of connecting rods, and the plurality of clamping plates are respectively located on the inner sides of the through holes for adjusting the aperture of the through holes.

3. A high-toughness steel wire production quenching furnace according to claim 2, characterized in that: Both ends of the plurality of connecting rods are provided with connecting rods and connecting sleeves, two key grooves are symmetrically provided on the outer side of the connecting rod, two protrusions on one end of the connecting sleeve are respectively engaged with the inner sides of the two key grooves, the outer side of the other end of the connecting sleeve is rotatably connected with a mounting shell, both sides of the interior of the mounting shell are provided with limiting grooves, a gear A is rotatably connected between the two limiting grooves on the inner side of the mounting shell, and one side of the gear A is fixedly connected to the end of the connecting sleeve, and the outer edge of the gear A is meshed with two racks, the vertical surfaces of the two racks are fixedly connected with abutments, the other sides of the two racks are respectively slidably connected with the inner sides of the two limiting grooves, the inner sides of the two limiting grooves are fixedly connected with memory springs, and the memory springs are respectively fixedly connected with the racks; When the two blocks are pressed to push the two racks to move relative to each other, the gear A will be forced through the connecting sleeve and the connecting rod, causing the connecting rod clamping plate to flip at an angle inside the through hole.

4. A high-toughness steel wire production quenching furnace according to claim 1, characterized in that: A plurality of slide grooves are provided on the outer side of the mounting seat, the inner sides of the plurality of slide grooves are respectively engaged with the outer sides of the plurality of connecting sleeves, one side of the plurality of slide grooves is connected with a movable groove, the left and right sides of the movable groove are provided with clamping strips, the bottom of the clamping strips is provided with a first bevel block, and a second bevel block is provided on the inner side of the movable groove above the first bevel block.

5. A high-toughness steel wire production quenching furnace according to claim 1, characterized in that: The stirring mechanism includes a driving motor A and a support frame. The driving motor A is installed at the bottom of the quenching oil tank. The end of the output shaft of the driving motor A passes through the interior of the quenching oil tank and is fixedly connected with a turbofan.

6. A high-toughness steel wire production quenching furnace according to claim 5, characterized in that: The bottom end of the support frame is fixedly connected to the inner bottom of the quenching oil tank, an inner gear seat is rotatably connected between the ends inside the support frame, the upper surface of the inner gear seat is fixedly connected to the bottom end of the connecting seat B, a gear B is provided inside the inner gear seat, the bottom end of the gear B is fixedly connected to a support rod, the bottom end of the support rod passes through the inner wall of the support frame and is fixedly connected to the top of the turbofan, the outer edge of the gear B is meshed with a gear C, the bottom end of the gear C is fixedly connected with a rotating rod, the bottom end of the rotating rod is rotatably connected to the upper surface of the support frame, and the outer edge of the gear C is meshed with the inner edge of the inner gear seat.

7. A high-toughness steel wire production quenching furnace according to claim 1, characterized in that: Support plates are provided on both sides of the quenching oil tank, and a lifting cylinder is fixedly connected to the upper surface of the support plate, and a connecting frame is fixedly connected to the output end of the lifting cylinder, a rocker is provided on the inner side of the connecting frame, and a support seat is rotatably connected to the outer side of the rocker, and the bottom end of the support seat is fixedly connected to the upper surface of the quenching oil tank, and a bearing frame is provided at the other end of the rocker, and limiting slide grooves are provided on both sides of the bearing frame, and the two limiting slide grooves are slidably connected to the ends of the two rockers respectively.

8. A high-toughness steel wire production quenching furnace according to claim 7, characterized in that: A plurality of limit rods are slidably connected between the inner wall of the support frame and the pressure plate, the top ends of the limit rods are fixedly connected to the limit blocks, the bottom ends of the limit rods are fixedly connected to the support blocks, and the outer sides of the support blocks are fixedly connected to the outer sides of the mounting seats.

9. A high-toughness steel wire production quenching furnace according to claim 1, characterized in that: The blocking mechanism includes a connecting shell, which is connected to the interior of the furnace body between the heating chamber and the cooling chamber, and two telescopic cylinders A are symmetrically fixedly connected to the top of the connecting shell, and the output ends of the two telescopic cylinders A pass through the interior of the connecting shell and are fixedly connected to the insulation door; The conveying mechanism includes a mounting frame, two cross bars are symmetrically arranged on the inner side of the mounting frame, a threaded rod is rotatably connected between the two cross bars on the inner side of the mounting frame, a driving motor B is fixedly installed on one side of the mounting frame, the output shaft of the driving motor B passes through the inner wall of the mounting frame and is fixedly connected to one end of the threaded rod, a mounting block is threadedly connected to the outer side of the threaded rod, the inner side of the mounting block is respectively slidably connected to the outer sides of the two cross bars, a telescopic cylinder B is arranged at the bottom of the mounting block, the end of the telescopic cylinder B is fixedly connected to a connecting seat C, two electric push rods are installed on the inner side of the connecting seat C, a fork is connected between the ends of the two electric push rods, and a placement rack is arranged below the fork and above the load-bearing frame.

10. A quenching process for operating a quenching furnace for producing high-toughness steel wire according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1. First, place the steel wire that needs to be quenched in the placement rack, and then start the telescopic cylinder A to drive the heat insulation door to shrink to the inside of the connecting shell, so that the cooling chamber and the heating chamber are connected. Secondly, the fork is below the level of the placement rack, and then the telescopic cylinder B is contracted to make the fork drive the steel wire in the placement rack to be at a high position, and then start the driving motor B, so that the mounting block drives the placement rack to move toward the heating chamber through the fork, and the placement rack is pushed to the placement table in the heating chamber by starting the electric push rod. Then, the electric push rod drives the fork to move out of the heating chamber, and then the heat insulation door is closed, and then the steel wire in the placement rack can be heated inside the heating chamber. After the heating work is completed, the heat insulation door is opened, and the electric push rod drives the fork to move the placement rack from the heating chamber to the cooling chamber, and then the fork is driven by the mounting block to re-erect the placement rack on the upper surface of the carrier, and then the fork is separated from the placement rack; S2. When the steel wire in the placement rack is re-erected on the upper surface of the bearing rack after heating, the connecting rack is driven to rise by starting the lifting cylinder. When the connecting rack rises, one end of the rocker arm will be adaptively offset along the inner side of the connecting rack, so that the rocker arm rotates with the support seat as the center. Then, at this time, the other end of the rocker arm will drive the bearing rack to move down to the inside of the quenching oil tank through the limiting slide groove. When the bearing rack descends, it will simultaneously drive the steel wire in the placement rack to move down to the inside of the quenching oil tank, so that the steel wire contacts the oil in the quenching oil tank, so as to perform oil quenching; S3. Then, the driving motor A is started to drive the turbofan to rotate and stir at the bottom of the quenching oil tank, thereby generating a certain centrifugal force. Then, the oil in the quenching oil tank flows under the action of the centrifugal force, so that the oil in the quenching oil tank makes an approximately circular motion, and the impurities dispersed in the oil will also move with the oil flow, so that the impurities gather toward the stirring center of the turbofan, and the impurities will collide with each other during the gathering process, so that the impurities with smaller particles are easy to gather into larger particles, and the enlarged particles are more likely to settle at the bottom of the quenching oil tank under the action of gravity. S4. Then, while the connecting seat B is rotating, the end of the inner protrusion of the connecting seat B fits with the arc groove on the outer side of the connecting seat A, so that the connecting seat A synchronously drives the pressure plate to move up and down reciprocatingly, wherein the through hole is in a closed state during the downward movement of the pressure plate, thereby increasing the pressure of the oil at the bottom of the quenching oil tank when the pressure plate moves downward, so that the oil at the bottom of the quenching oil tank will pass through the filter frame under the influence of pressure and flow to the top of the quenching oil tank for heat exchange, making the oil temperature more uniform, and the filter frame will directly intercept the impurities in the oil and filter them, preventing them from contacting the steel wire with the flow of the oil, and when the pressure plate rises again, the through hole is in an open and closed state, and then the pressure plate rises, the oil in the quenching oil tank will flow to the lower layer through the through hole, and the impurities carried in the upper layer of the oil will also flow to the lower layer through the through hole, thereby reducing the impurities contained in the oil in the upper layer of the quenching oil tank that contacts the steel wire. S5. After the quenching of the steel wire is completed, the connecting frame is driven to move downward by starting the lifting cylinder. When the connecting frame is lowered, one end of the rocker arm will be adaptively offset along the inner side of the connecting frame, so that the rocker arm rotates in the opposite direction with the support seat as the center. Then, the other end of the rocker arm drives the supporting frame to return to the inside of the cooling chamber. When the supporting frame drives the placing frame, it needs to be idle for a period of time so that the oil stains on the surface of the steel wire after oil quenching can drip back into the quenching oil tank through the gap between the placing frame and the supporting frame. Then, after all the work is completed, the furnace door can be opened to take out the quenched steel wire.

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