Alloy steel after-forging heat treatment device with internal heat circulation

Abstract

The invention discloses a heat internal circulation alloy steel post-forging heat treatment device, and relates to the technical field of automobile part heat treatment, the heat internal circulation alloy steel post-forging heat treatment device comprises a quenching treatment box and a heating furnace, the bottom of the heating furnace is fixedly provided with a circulation heating mechanism, and the two sides of the quenching treatment box are provided with transmission quenching mechanisms; and the transmission quenching mechanism drives the movable sealing door to be connected with and separated from the heating furnace. The heating furnace can be controlled to be opened and closed through the opening and closing mechanism, heat in the heating furnace can be prevented from being dissipated when the heating furnace is closed, the heat in the heating furnace can be circularly dispersed through the cyclic heating mechanism, and rapid and uniform temperature rise in the heating furnace is facilitated; and the subsequent heating treatment efficiency of the automobile alloy steel fastener is improved, chippings on the surface of the automobile alloy steel fastener on the top of the containing plate can be effectively removed in the heat circulation process, and the situation that the heat treatment effect is affected by chipping residues is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of heat treatment of automobile parts, in particular to an alloy steel post-forging heat treatment device with internal heat circulation. BACKGROUND

[0002] Automobile fasteners, such as engine cylinder body bolts, chassis connecting nuts, transmission shaft fasteners and the like, are core components for guaranteeing the structural strength and driving safety of vehicles, and the materials thereof are mostly high-strength alloy steel. After being forged into a shape, the alloy steel needs to be subjected to post-forging heat treatment, mainly quenching and high-temperature tempering, to control the microstructure so as to meet the mechanical property requirements of the automobile industry on the tensile strength, yield strength and elongation after fracture of the fasteners, and to ensure the consistency of the performance of batch products and avoid safety accidents caused by failure of a single component. However, the alloy steel post-forging heat treatment device needs to be used when the automobile fasteners are subjected to post-forging heat treatment.

[0003] However, the existing alloy steel post-forging heat treatment device still has some defects when in use. For example, the heat treatment device for cast alloy steel products in the application No. CN202120635194.8 comprises a heating box, a water tank and a cover plate, a pair of supporting rods are welded to the bottom end of the outer wall of the cover plate, a slide rail is arranged on one side of the outer wall of each supporting rod, a slide groove is arranged on the inner wall of the heating box near the supporting rods, a pair of supporting shafts are movably connected between the supporting rods, a coil spring is arranged around each end of the supporting rods, a base table is welded to one side of the bottom end of the heating box, an extension hydraulic cylinder is installed on the top end of the base table, the output end of the extension hydraulic cylinder is fixedly connected with the cover plate, a bottom plate is welded to one side of the outer wall of the cover plate, a first pulley is installed on the bottom end of the bottom plate, a handle is connected to one side of the outer wall of the water tank, the handle penetrates through the water tank and is connected with a pull rod, and the pull rod is connected with a bracket at one end. The heat treatment device in the application has the advantages of simple and reasonable structure, novel design, simple and convenient operation, high work efficiency, protection function for the workers and high practical value. However, the following problems still exist in the actual use process. When the heat treatment device for cast alloy steel products heats the inside, the heating structure at a fixed position is usually used to heat the inside. However, the heating method at a fixed position can easily reduce the uniformity of the heating effect in the inside, thereby reducing the heating efficiency of the alloy steel. In addition, the surface adhered debris of the alloy steel can also affect the subsequent heat treatment effect when the alloy steel enters the inside. When the heat treatment device for cast alloy steel products cools and quenches the heated alloy steel by using the water tank, the liquid close to the alloy steel is first heated, while the liquid far from the alloy steel is slowly heated, thereby causing the liquid in the water tank to be unevenly heated, and thereby reducing the cooling and quenching efficiency of the alloy steel. In addition, the operation of the alloy steel into the water tank is also complicated.

[0004] In view of this, in view of the above problems, in-depth research, and then the case occurs.

[0005] In view of the above problems, the original alloy steel heat treatment device after forging is innovatively designed on the basis of internal heat circulation. SUMMARY

[0006] The purpose of the present application is to provide a kind of alloy steel heat treatment device after forging of internal heat circulation, to solve the problems of uneven internal heating in the background art, reduce heating efficiency, and not convenient to clean the debris on the surface of alloy steel and the uneven heating of liquid in the water tank, resulting in reduced cooling efficiency and the operation of alloy steel conveying into water tank is complex.

[0007] To achieve the above object, the present application provides the following technical scheme: a kind of alloy steel heat treatment device after forging of internal heat circulation, including quenching treatment box and heating furnace, The left and right sides of the quenching treatment box are symmetrically installed with support angle plate, the rear end top of the quenching treatment box is fixedly installed with heating furnace, and the front end of the heating furnace is installed with opening and closing mechanism; The bottom of the heating furnace is fixedly installed with circulating heating mechanism; The two sides of the quenching treatment box are installed with transmission quenching mechanism, and the transmission quenching mechanism drives the movable sealing door to connect and separate with the heating furnace, the rear side of the movable sealing door is fixedly installed with placing plate, and the placing plate and the movable sealing door are obliquely connected with support rod; The two sides of the quenching treatment box are installed with pneumatic mixing mechanism.

[0008] Preferably, the opening and closing mechanism includes a lifting cylinder fixedly installed on the top surface of the heating furnace, the top end of the lifting cylinder is fixedly sleeved with a connecting plate, the bottom end of the connecting plate is fixedly installed with a sealing door, and the sealing door is slidably connected with the top of the heating furnace.

[0009] The above technical scheme is adopted, the front end of the heating furnace is closed and opened by the opening and closing mechanism, so that the movable sealing door, the placing plate and the automobile alloy steel fastener in the heating furnace can be heated when opened, and the movable sealing door and the placing plate can be closed when leaving the heating furnace for quenching, which is beneficial to prevent the heat in the heating furnace from being discharged in large amount, and improves the use effect.

[0010] Preferably, the circulating heating mechanism includes an electric heating pipe attached to the bottom surface of the heating furnace, the connecting end of the electric heating pipe penetrates the bottom of the heating furnace, the connecting end of the electric heating pipe is fixedly connected with a controller, and the top of the controller is fixedly connected with the bottom surface of the heating furnace.

[0011] Preferably, the circulating heating mechanism further comprises a limiting frame fixedly installed at the bottom of the heating furnace, a circulating fan blade is rotatably connected inside the limiting frame, a connecting rod is fixedly penetrated in the middle of the circulating fan blade, a collecting hopper is fixedly connected to the bottom end of the limiting frame, a first servo motor is installed at the bottom end of the collecting hopper, the shaft end of the first servo motor is fixedly connected with the bottom end of the connecting rod, shunt pipes are fixedly installed at the left and right sides and the rear side of the bottom of the collecting hopper, circulating pipes are fixedly connected to the ends of the shunt pipes away from the collecting hopper, and the top end of the circulating pipe is connected with the top of the heating furnace.

[0012] The above technical scheme facilitates effective heating of the inside of the heating furnace by the circulating heating mechanism, is conducive to effective circulation of heat in the heating furnace, is conducive to improving the uniformity of the temperature rise in the heating furnace during the circulation of heat, and improves the efficiency of subsequent heating of the automobile alloy steel fastener, and the circulating heat can also remove the adhered debris on the surface of the automobile alloy steel fastener, avoiding the influence of the adhered debris on the subsequent quenching effect.

[0013] Preferably, the transmission quenching mechanism comprises positioning shaft seats symmetrically installed on the left and right side surfaces of the quenching treatment box, a first transmission screw is penetrated and connected inside the positioning shaft seat, a driven pulley is fixedly sleeved on the front end of the first transmission screw, a second servo motor is fixedly installed on the front side surface of the quenching treatment box, a driving pulley is installed on the shaft end of the second servo motor, and a transmission belt is connected between the driving pulley and the two driven pulleys.

[0014] Preferably, the transmission quenching mechanism further comprises a sliding seat sleeved on the first transmission screw on the two sides, a fixed shaft seat is fixedly installed at the bottom end of the sliding seat inside the quenching treatment box, a second transmission screw is penetrated and installed inside the fixed shaft seat, a lifting seat is sleeved on the top outer ring of the second transmission screw, the rear end of the lifting seat is fixedly connected with the top front side of the movable door, a driven gear is fixedly installed at the bottom end of the second transmission screw, and fixed racks are symmetrically installed on the top inside of the front end of the quenching treatment box.

[0015] Preferably, the second transmission screw on the two sides is rotatably connected with the fixed shaft seat, and the threads on the second transmission screws on the two sides are oppositely arranged.

[0016] Adopting the technical scheme, the transmission quenching mechanism can drive the movable sealing door to connect with the heating furnace and separate from the heating furnace, facilitating the taking out of the automobile alloy steel fastener after the heating treatment, and the automobile alloy steel fastener can be driven to descend into the quenching treatment box to realize quenching treatment during the taking-out movement, the transmission quenching mechanism can also drive the movable sealing door to move to the heating furnace after the quenching is completed, and the automobile alloy steel fastener after the quenching can be driven to ascend to realize the discharging work during the movement, thereby improving the structural linkage and operation convenience of the feeding and discharging work and the quenching work.

[0017] Preferably, the pneumatic mixing mechanism comprises a driving bevel gear fixedly installed at the front end of the first transmission screw rod, connecting seats are symmetrically installed at the front end of the quenching treatment box, sealing sleeves are fixedly installed at the inner rings of the connecting seats, fixed bearings are inlaidly installed in the upper and lower ends of the sealing sleeves, reciprocating lead screws are fixedly connected to the inner rings of the fixed bearings, movable pressing plates are sleeved on the outer rings of the reciprocating lead screws in the sealing sleeves, driven bevel gears are fixedly installed at the top ends of the reciprocating lead screws, and the driven bevel gears are perpendicularly meshed and connected with the driving bevel gear.

[0018] Preferably, the reciprocating lead screw drives the movable pressing plate to reciprocate and slide in the sealing sleeve when the reciprocating lead screw rotates, and the outer ring of the movable pressing plate is in close contact and slidingly connected with the inner wall of the sealing sleeve.

[0019] Preferably, the pneumatic mixing mechanism further comprises one-way air inlet valves fixedly inlaid at the inner sides of the upper and lower ends of the sealing sleeves on the two sides, one-way air outlet valves are fixedly inlaid at the outer sides of the upper and lower ends of the sealing sleeves on the two sides, connecting pipes are fixedly connected to the air outlet ends of the one-way air outlet valves, nozzles are installed at equal intervals on the inner sides of the connecting pipes on the two sides, and the nozzles are fixedly connected with the two sides of the quenching treatment box.

[0020] Adopting the technical scheme, the transmission quenching mechanism can drive the movable sealing door to connect with the heating furnace and separate from the heating furnace, facilitating the taking out of the automobile alloy steel fastener after the heating treatment, and the automobile alloy steel fastener can be driven to descend into the quenching treatment box to realize quenching treatment during the taking-out movement, the transmission quenching mechanism can also drive the movable sealing door to move to the heating furnace after the quenching is completed, and the automobile alloy steel fastener after the quenching can be driven to ascend to realize the discharging work during the movement, thereby improving the structural linkage and operation convenience of the feeding and discharging work and the quenching work.

[0021] Compared with the prior art, the alloy steel post-forging heat treatment device with internal heat circulation has the following beneficial effects: the opening and closing mechanism can control the opening and closing of the heating furnace, thereby preventing the heat inside the heating furnace from being dissipated when the heating furnace is closed, improving the heat preservation effect; the circulation heating mechanism can circulate and disperse the heat inside the heating furnace, which is beneficial to the rapid and uniform heating of the heating furnace, and improves the heating treatment efficiency of the automobile alloy steel fastener; in the heat circulation process, the debris on the surface of the automobile alloy steel fastener placed on the top of the placement plate can be effectively removed, avoiding the influence of the residual debris on the heat treatment effect of the automobile alloy steel fastener. The transmission quenching mechanism can drive the movable sealing door, the placement plate and the automobile alloy steel fastener placed thereon to separate from the heating furnace after heating, and can realize the lowering of the automobile alloy steel fastener during the separation process, which is beneficial to the quenching of the automobile alloy steel fastener in the quenching liquid in the quenching treatment box after heating, and the automobile alloy steel fastener after quenching can be lifted to realize discharging when the transmission quenching mechanism drives the movable sealing door to move towards the heating furnace, improving the discharging convenience. During the operation of the transmission quenching mechanism, the first transmission screw rod drives the pneumatic mixing mechanism to perform reciprocating piston movement, so that the gas discharged during the piston movement can pneumatically mix the liquid inside the quenching treatment box, which is beneficial to the uniform heating of the mixed liquid, improves the cooling and quenching efficiency of the automobile alloy steel fastener, and improves the use effect of the alloy steel post-forging heat treatment device with internal heat circulation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a side view structure schematic diagram of the present application; Figure 2 It is a heating furnace and movable sealing door separation structure schematic diagram of the present application; Figure 3 It is a heating furnace side section and electric heating pipe distribution structure schematic diagram of the present application; Figure 4 It is a limiting frame and collecting hopper side section structure schematic diagram of the present application; Figure 5 It is a first transmission screw rod and movable sealing door transmission structure schematic diagram of the present application; Figure 6 It is a first transmission screw rod and second servo motor transmission structure schematic diagram of the present application; Figure 7 It is a driven gear and fixed rack meshing transmission structure schematic diagram of the present application; Figure 8 It is a sealing sleeve and connecting pipe connection structure schematic diagram of the present application; Figure 9 It is a sealing sleeve side section structure schematic diagram of the present application; Figure 10 Figure is a schematic diagram of the connecting structure of the reciprocating wire rod and the movable pressing plate of the application.

[0023] In the figure: 1, quenching treatment box; 2, support angle plate; 3, heating furnace; 4, lifting cylinder; 5, connecting plate; 6, sealing door; 7, electric heating pipe; 8, controller; 9, limiting frame; 10, circulating fan blade; 11, connecting rod; 12, collecting hopper; 13, first servo motor; 14, shunt pipe; 15, circulating pipe; 16, positioning shaft seat; 17, first transmission screw; 18, driven pulley; 19, second servo motor; 20, driving pulley; 21, transmission belt; 22, sliding seat; 23, fixed shaft seat; 24, second transmission screw; 25, lifting seat; 26, driven gear; 27, fixed rack; 28, movable sealing door; 29, placing plate; 30, support rod; 31, driving bevel gear; 32, connecting seat; 33, sealing sleeve; 34, fixed bearing; 35, reciprocating wire rod; 36, movable pressing plate; 37, driven bevel gear; 38, one-way air inlet valve; 39, one-way air outlet valve; 40, connecting pipe; 41, spray head. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0025] Please refer to Figures 1-10 The application provides a technical solution: an alloy steel post-forging heat treatment device with internal heat circulation, comprising a quenching treatment box 1 and a heating furnace 3, support angle plates 2 are symmetrically installed on the left and right sides of the quenching treatment box 1, a heating furnace 3 is fixedly installed at the top of the rear end of the quenching treatment box 1, an opening and closing mechanism is installed at the front end of the heating furnace 3, the opening and closing mechanism comprises a lifting cylinder 4 fixedly installed on the top surface of the heating furnace 3, a connecting plate 5 is fixedly sleeved at the top end of the lifting cylinder 4, a sealing door 6 is fixedly installed at the bottom end of the connecting plate 5, and the sealing door 6 is in through sliding connection with the top of the heating furnace 3. The design of the above structure enables the sealing door 6 to be lifted and lowered on the top of the front end of the heating furnace 3 by the connecting plate 5 through the control of the lifting cylinder 4, the front end of the heating furnace 3 can be opened when the sealing door 6 is lifted, at this time, the movable sealing door 28 can be used to close the front end of the heating furnace 3, and the placed automobile alloy steel fastener can be lifted to the inside of the heating furnace 3 by the placing plate 29 to realize the heating work, and the front end of the heating furnace 3 can be closed when the sealing door 6 is lowered, which is beneficial to the automobile alloy steel fastener being lifted away from the heating furnace 3 by the movable sealing door 28 and the placing plate 29 and being quenched, and the sealing door 6 can prevent the heat in the heating furnace 3 from being quickly dissipated, thereby improving the heat preservation effect.

[0026] The bottom of the heating furnace 3 is fixedly provided with a circulating heating mechanism, the circulating heating mechanism comprises an electric heating pipe 7 attached to the bottom surface of the inside of the heating furnace 3, the connecting end of the electric heating pipe 7 penetrates through the bottom of the heating furnace 3, the connecting end of the electric heating pipe 7 is fixedly connected with a controller 8, the top of the controller 8 is fixedly connected with the bottom surface of the heating furnace 3, the circulating heating mechanism further comprises a limiting frame 9 fixedly installed at the bottom of the heating furnace 3, a circulating fan blade 10 is rotatably connected in the limiting frame 9, a connecting rod 11 is fixedly penetrated in the middle of the circulating fan blade 10, a collecting hopper 12 is fixedly connected at the bottom end of the limiting frame 9, a first servo motor 13 is installed at the bottom end of the collecting hopper 12, the shaft end of the first servo motor 13 is fixedly connected with the bottom end of the connecting rod 11, and a shunt pipe 14 is fixedly installed at the left and right sides and the back of the bottom of the collecting hopper 12, one end of the shunt pipe 14 away from the collecting hopper 12 is fixedly connected with a circulating pipe 15, and the top end of the circulating pipe 15 is connected with the top of the heating furnace 3 in a penetrating manner; The design of the above structure enables the sealing door 6 to be lifted and lowered on the top of the front end of the heating furnace 3 by the connecting plate 5 through the control of the lifting cylinder 4, the front end of the heating furnace 3 can be opened when the sealing door 6 is lifted, at this time, the movable sealing door 28 can be used to close the front end of the heating furnace 3, and the placed automobile alloy steel fastener can be lifted to the inside of the heating furnace 3 by the placing plate 29 to realize the heating work, and the front end of the heating furnace 3 can be closed when the sealing door 6 is lowered, which is beneficial to the automobile alloy steel fastener being lifted away from the heating furnace 3 by the movable sealing door 28 and the placing plate 29 and being quenched, and the sealing door 6 can prevent the heat in the heating furnace 3 from being quickly dissipated, thereby improving the heat preservation effect.

[0027] Both sides of the quenching treatment box 1 are provided with a transmission quenching mechanism, the transmission quenching mechanism drives the movable sealing door 28 to connect and separate from the heating furnace 3, the rear side of the movable sealing door 28 is fixedly provided with a placing plate 29, the placing plate 29 and the movable sealing door 28 are obliquely connected with a supporting rod 30, the transmission quenching mechanism comprises a positioning shaft seat 16 symmetrically arranged on the left and right surfaces of the quenching treatment box 1, the first transmission screw rod 17 is connected through the inside of the positioning shaft seat 16, the driven pulley 18 is fixedly sleeved on the front end of the first transmission screw rod 17, the second servo motor 19 is fixedly arranged on the front surface of the quenching treatment box 1, the driving pulley 20 is arranged on the shaft end of the second servo motor 19, the transmission belt 21 is connected between the driving pulley 20 and the driven pulley 18, the transmission quenching mechanism further comprises a sliding seat 22 sleeved on the first transmission screw rod 17, the fixed shaft seat 23 is fixedly arranged on the bottom end of the sliding seat 22 in the quenching treatment box 1, the second transmission screw rod 24 is arranged through the inside of the fixed shaft seat 23, the lifting seat 25 is sleeved on the top of the second transmission screw rod 24, the rear end of the lifting seat 25 is fixedly connected with the top front side of the movable sealing door 28, the driven gear 26 is fixedly arranged on the bottom end of the second transmission screw rod 24, the fixed rack 27 is symmetrically arranged on the top of the front end inside of the quenching treatment box 1. The rotation of the second servo motor 19 drives the driving pulley 20 to rotate, then the driving pulley 20 drives the driven pulley 18 to rotate through the transmission belt 21, at this time the driven pulley 18 drives the first transmission screw rod 17 to rotate in the inside of the positioning shaft seat 16, at this time the forward rotation of the first transmission screw rod 17 drives the second transmission screw rod 24 to move through the sliding seat 22 and the fixed shaft seat 23, and drives the lifting seat 25 and the movable sealing door 28 to move away from the heating furnace 3, and then drives the placing plate 29 and the automobile alloy steel fastener placed on the placing plate 29 to move away from the heating furnace 3, and at the same time the driven gear 26 meshes and drives the fixed rack 27 during the moving process, at this time the driven gear 26 drives the second transmission screw rod 24 to rotate forward, and drives the lifting seat 25, the movable sealing door 28, the placing plate 29 and the automobile alloy steel fastener to descend into the quenching treatment box 1, which is beneficial to quenching treatment of the automobile alloy steel fastener. When the quenching is completed, the reverse rotation of the first transmission screw rod 17 drives the sliding seat 22, the fixed shaft seat 23, the second transmission screw rod 24, the lifting seat 25 and the movable sealing door 28 to move towards the heating furnace 3, at this time the meshing and driving of the driven gear 26 and the fixed rack 27 drives the second transmission screw rod 24 to rotate reversely, and drives the lifting seat 25 and the movable sealing door 28 to ascend, and drives the automobile alloy steel fastener to ascend through the placing plate 29, until the automobile alloy steel fastener leaks out of the liquid in the quenching treatment box 1, so that the automobile alloy steel fastener can be discharged at this time. After the discharging is completed, the automobile alloy steel fasteners to be heat treated can continue to be placed on the placing plate 29, and then the reverse rotation of the second transmission screw 24 is utilized to drive the sliding seat 22, the fixed shaft seat 23, the second transmission screw 24, the lifting seat 25 and the movable sealing door 28 to move towards the heating furnace 3 until the movable sealing door 28 closes the front end of the heating furnace 3, at which time the placing plate 29 and the automobile alloy steel fasteners placed thereon are located inside the heating furnace 3 to realize the heating treatment work.

[0028] The quenching treatment box 1 is provided with a pneumatic mixing mechanism on both sides, which comprises a driving bevel gear 31 fixedly installed at the front end of the first transmission screw 17, and connecting seats 32 symmetrically installed on both sides of the front end of the quenching treatment box 1. A sealing sleeve 33 is fixedly installed in the inner ring of the connecting seat 32. Fixed bearings 34 are inlaidly installed in the upper and lower ends of the sealing sleeve 33. Reciprocating lead screws 35 are fixedly connected to the inner ring of the fixed bearings 34. Movable pressing plates 36 are sleeved on the outer ring of the reciprocating lead screws 35 in the sealing sleeve 33. The movable pressing plates 36 slide in the sealing sleeve 33 under the driving of the reciprocating lead screws 35. The outer ring of the movable pressing plate 36 is in close contact with the inner wall of the sealing sleeve 33. A driven bevel gear 37 is fixedly installed at the top end of the reciprocating lead screw 35. The driven bevel gear 37 is perpendicularly engaged with the driving bevel gear 31. The pneumatic mixing mechanism further comprises one-way air inlet valves 38 fixedly inlaid in the inner sides of the upper and lower ends of the sealing sleeves 33 on both sides. One-way air outlet valves 39 are fixedly inlaid on the outer sides of the upper and lower ends of the sealing sleeves 33 on both sides. Connecting pipes 40 are fixedly connected to the air outlet ends of the one-way air outlet valves 39. Nozzles 41 are installed at equal intervals on the inner sides of the connecting pipes 40 on both sides. The nozzles 41 are fixedly connected to both sides of the quenching treatment box 1. The above structure enables the driving bevel gear 31 to rotate under the forward and reverse rotation of the first transmission screw 17, and then the driving bevel gear 31 drives the driven bevel gear 37 to rotate through the perpendicular engagement with the driven bevel gear 37. The driven bevel gear 37 drives the reciprocating lead screw 35 to rotate in the sealing sleeve 33 in cooperation with the fixed bearings 34, and then drives the movable pressing plate 36 to reciprocate in the sealing sleeve 33. In the process of reciprocating, the one-way air inlet valve 38 is used for air inlet, and the one-way air outlet valve 39 is used for air outlet. The discharged gas is discharged into the quenching treatment box 1 through the connecting pipe 40 and the nozzle 41, which is beneficial to the pneumatic mixing of the liquid in the quenching treatment box 1, the uniform heating of the mixed liquid, and the rapid quenching cooling of the heated automobile alloy steel fasteners.

[0029] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0030] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. An alloy steel post-wrought heat treatment device with internal heat circulation, comprising a quenching treatment box (1) and a heating furnace (3), characterized in that: supporting angle plates (2) are symmetrically installed on the left and right sides of the quenching treatment box (1), a heating furnace (3) is fixedly installed on the top of the rear end of the quenching treatment box (1), and an opening and closing mechanism is installed on the front end of the heating furnace (3); a circulating heating mechanism is fixedly installed on the bottom of the heating furnace (3); a driving quenching mechanism is installed on the two sides of the quenching treatment box (1), the driving quenching mechanism drives a movable sealing door (28) to connect and separate from the heating furnace (3), a placing plate (29) is fixedly installed on the rear side of the movable sealing door (28), and a supporting rod (30) is obliquely connected between the movable sealing door (28) and the placing plate (29); a pneumatic mixing mechanism is installed on the two sides of the quenching treatment box (1).

2. A device for heat post-wrought heat treatment of an alloy steel according to claim 1, characterized in that: The opening and closing mechanism comprises a lifting air cylinder (4) fixedly installed on the top surface of the heating furnace (3), a connecting plate (5) fixedly sleeved on the top end of the lifting air cylinder (4), a sealing door (6) fixedly installed on the bottom end of the connecting plate (5), and the sealing door (6) is in through sliding connection with the top of the heating furnace (3).

3. A device for heat post-wrought heat treatment of an alloy steel according to claim 1, characterized in that: The circulating heating mechanism comprises an electric heating pipe (7) attached to the inner bottom surface of the heating furnace (3), the connecting end of the electric heating pipe (7) penetrates through the bottom of the heating furnace (3), a controller (8) is fixedly connected to the connecting end of the electric heating pipe (7), and the top of the controller (8) is fixedly connected with the bottom surface of the heating furnace (3).

4. A device for heat post-wrought heat treatment of an alloy steel according to claim 3, characterized in that: The circulating heating mechanism further comprises a limiting frame (9) fixedly installed on the bottom of the heating furnace (3), a circulating fan blade (10) rotatably connected in the limiting frame (9), a connecting rod (11) fixedly penetrating through the middle of the circulating fan blade (10), a collecting hopper (12) fixedly connected to the bottom end of the limiting frame (9), a first servo motor (13) installed on the bottom end of the collecting hopper (12), the shaft end of the first servo motor (13) fixedly connected with the bottom end of the connecting rod (11), shunt pipes (14) fixedly installed on the left and right sides and the rear side of the bottom of the collecting hopper (12), a circulating pipe (15) fixedly connected to one end of the shunt pipes (14) away from the collecting hopper (12), and the top end of the circulating pipe (15) in through connection with the top of the heating furnace (3).

5. A device for heat post-wrought heat treatment of an alloy steel according to claim 1, characterized in that: The driving quenching mechanism comprises positioning shaft seats (16) symmetrically installed on the left and right side surfaces of the quenching treatment box (1), first driving screws (17) penetratingly connected in the positioning shaft seats (16), driven pulleys (18) fixedly sleeved on the front ends of the first driving screws (17), a second servo motor (19) fixedly installed on the front side surface of the quenching treatment box (1), a driving pulley (20) installed on the shaft end of the second servo motor (19), and a driving belt (21) connected between the driving pulley (20) and the two driven pulleys (18).

6. A device for heat post-wrought heat treatment of an alloy steel according to claim 5, characterized in that: The transmission quenching mechanism further comprises a sliding seat (22) sleeved on the first transmission screw rod (17) on both sides, a fixed shaft seat (23) fixedly installed at the bottom end of the sliding seat (22) inside the quenching treatment box (1), a second transmission screw rod (24) penetratingly installed in the fixed shaft seat (23), a lifting seat (25) sleeved on the top outer ring of the second transmission screw rod (24), the rear end of the lifting seat (25) fixedly connected with the top front side of the movable sealing door (28), a driven gear (26) fixedly installed at the bottom end of the second transmission screw rod (24), and a fixed rack (27) symmetrically installed at the top of the inner side of the front end of the quenching treatment box (1).

7. A device for heat post-wrought heat treatment of an alloy steel according to claim 6, characterized in that: The second transmission screw rod (24) on both sides is rotationally connected with the fixed shaft seat (23), and the threads on the second transmission screw rod (24) on both sides are oppositely formed.

8. A device for heat post-wrought heat treatment of an alloy steel according to claim 5, characterized in that: The pneumatic mixing mechanism comprises a driving bevel gear (31) fixedly installed at the front end of the first transmission screw rod (17), a connecting seat (32) symmetrically installed at the front end of the quenching treatment box (1), a sealing sleeve (33) fixedly installed at the inner ring of the connecting seat (32), fixed bearings (34) inlaidly installed at the upper and lower ends of the inner part of the sealing sleeve (33), a reciprocating screw rod (35) fixedly connected with the inner ring of the fixed bearing (34), a movable pressing plate (36) sleeved on the outer ring of the reciprocating screw rod (35) inside the sealing sleeve (33), a driven bevel gear (37) fixedly installed at the top end of the reciprocating screw rod (35), and the driven bevel gear (37) vertically meshingly connected with the driving bevel gear (31).

9. A device for heat post-wrought heat treatment of an alloy steel according to claim 8, characterized in that: The reciprocating screw rod (35) rotates to drive the movable pressing plate (36) to reciprocally slide in the sealing sleeve (33), and the outer ring of the movable pressing plate (36) is tightly connected with the inner wall of the sealing sleeve (33) in sliding mode.

10. A device for heat post-wrought heat treatment of an alloy steel according to claim 9, characterized in that: The pneumatic mixing mechanism further comprises one-way air inlet valves (38) fixedly inlaid at the inner sides of the upper and lower ends of the sealing sleeve (33) on both sides, one-way air outlet valves (39) fixedly inlaid at the outer sides of the upper and lower ends of the sealing sleeve (33) on both sides, a connecting pipe (40) fixedly connected with the air outlet end of the one-way air outlet valve (39), spray heads (41) installed at the inner sides of the connecting pipe (40) on both sides at equal intervals, and the spray heads (41) penetratingly fixedly connected with the quenching treatment box (1) on both sides.

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