Vacuum air-cooling oil quenching furnace for fastener production

Abstract

The vacuum air-cooling oil quenching furnace for fastener production comprises a base, a furnace body, a quenching device body and a material conveying device, and the furnace body is installed on the base; the material conveying device comprises a placing frame; the placing frame comprises a frame body, a plurality of net plates and at least four threaded sleeves; the frame body is arranged along the length direction of the furnace body; the threaded sleeve is coaxially arranged on the supporting rod of the frame body in a sleeving mode, and the threaded sleeve is in threaded connection with the supporting rod of the frame body. The plurality of screen plates are arranged in parallel, the plurality of screen plates are distributed in the height direction of the frame body, the screen plates are rotatably connected with the threaded sleeves, and a plurality of placing holes used for placing the fasteners are formed in the screen plates; the quenching device body is mounted on the furnace body; by means of the adjustable placing frame, the distance between every two adjacent net plates and the height of the net plates can be conveniently adjusted according to the size specifications of the fasteners, meanwhile, the stacked fasteners can be conveniently disassembled one by one, the quenching machining uniformity of the fasteners is improved, and then the quenching quality of the fasteners is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fastener heat treatment, and in particular to a vacuum air-cooled oil-quenching furnace for fastener production. Background Art

[0002] Fasteners are mechanical parts used to fasten two or more parts or components. The processing of fasteners includes the following steps: modification of raw materials, wire processing, blank forming, wire heat treatment and surface treatment. Fasteners need to be vacuum quenched during the heat treatment process. The quenching in vacuum includes gas quenching and liquid quenching. Liquid quenching means that after the workpiece is heated in the heating chamber, it is moved to the cooling chamber, filled with high-purity nitrogen and immediately sent to the quenching oil tank for rapid cooling.

[0003] The oil quenching air-cooling vacuum furnace in the prior art includes a furnace body, a walking mechanism for a workpiece, a vacuum system, a cooling system, an electronic control system, an oil quenching processing system, and an oil circulation device for the oil quenching air-cooling vacuum furnace. The oil circulation device includes an oil outlet and an oil inlet arranged on the side wall of the furnace body, an oil pump connected to the oil outlet, and a temperature controller connected to the oil pump and the oil inlet at both ends respectively. The oil outlet, the oil pump, the temperature controller, and the oil inlet are connected by an oil pipe, and the temperature controller is provided with a temperature detection device and an automatic heating or cooling device; the oil outlet is arranged at the lowermost end of the side wall of the furnace body; the oil inlet is arranged on the side wall of the furnace body and is higher than the position where the workpiece is located.

[0004] When the above-mentioned oil-quenching and air-cooling vacuum furnace performs vacuum quenching on fasteners, the fasteners are stacked in the inner cavity of the furnace body. However, since the workpieces are stacked on a placement plate, the surface of the fasteners is unevenly quenched, which affects the quenching quality of the fasteners. Summary of the invention

[0005] In order to improve the quenching quality of fasteners, the present application provides a vacuum air-cooled oil quenching furnace for fastener production.

[0006] The present application provides a vacuum air-cooled oil-quenching furnace for fastener production, which adopts the following technical solution: A vacuum air-cooled oil-quenching furnace for fastener production, comprising a base, a furnace body, a quenching device body and a feeding device, wherein the furnace body is mounted on the base; The feeding device comprises a placing rack placed in the cavity of the furnace body; The placement rack includes a rack body, a plurality of mesh plates, and at least four threaded sleeves rotatably connected to each of the mesh plates; The frame is arranged along the length direction of the furnace body; The threaded sleeve is coaxially sleeved on the support rod of the frame, and the threaded sleeve is threadedly connected to the support rod of the frame; The plurality of mesh plates are arranged in parallel and distributed along the height direction of the frame, the mesh plates are rotatably connected to the threaded sleeves, and the mesh plates are provided with a plurality of placement holes for placing each fastener; The quenching device body is installed on the furnace body, and the quenching device body is used for quenching processing of fasteners.

[0007] By adopting the above technical scheme, during the fastener quenching process, first, according to the size specifications of the fastener, the staff rotates the threaded sleeve. Since the threaded sleeve is threadedly connected to the support rod of the frame, the threaded sleeve moves along the axial direction of the support rod of the frame, and the threaded sleeve drives the mesh plate to rise and fall, so that the distance between two adjacent mesh plates is greater than the height of the fastener. Then, the staff installs the fasteners one by one in the placement holes, and then adjusts the quenching device body to perform vacuum air-cooling quenching on the fasteners. The designed vacuum air-cooled oil quenching furnace for fastener production, through the adjustable placement rack, is convenient for adjusting the distance between two adjacent mesh plates and adjusting the height of the mesh plates according to the size specifications of the fasteners. At the same time, it is convenient to split the stacked fasteners one by one, thereby improving the uniformity of the fastener quenching process, and then improving the quenching quality of the fasteners.

[0008] Optionally, the feeding device includes a track frame and a driving assembly; The track frame is installed on the bottom wall of the furnace body, and the track frame is located in the inner cavity of the furnace body, and the placement rack can slide along the track frame; The driving assembly includes a driving motor and a threaded rod; The driving motor is mounted on the base, and the output shaft of the driving motor is coaxially connected to the threaded rod; The threaded rod is arranged along the length direction of the furnace body, and the threaded rod is rotationally connected to the furnace body. The threaded rod passes through the placement rack, and the threaded rod is threadedly connected to the placement rack.

[0009] By adopting the above technical solution, the drive motor is adjusted, and the output shaft of the drive motor drives the threaded rod to rotate. Since the threaded rod is threadedly connected to the frame, the frame moves along the length direction of the track frame to achieve the adjustment of the frame position; the designed drive component is connected to the placement frame through the sliding connection between the track frame and the placement frame, which makes it easy to adjust the position of the placement frame, thereby making it convenient for the staff to take and place the fasteners on the placement frame.

[0010] Optionally, the feeding device further includes an auxiliary support seat, an auxiliary support rail and a plurality of hydraulic cylinders; The auxiliary support seat is located above the base, and the plane where the auxiliary support seat is located is parallel to the plane where the base is located, and the auxiliary support seat is arranged close to the discharge end of the furnace body; A plurality of the hydraulic cylinders are installed on the base, and piston rods of the plurality of the hydraulic cylinders are fixedly connected to the auxiliary support seat; The auxiliary support rail is installed on the auxiliary support seat, the auxiliary support rail is used to receive the frame, and the auxiliary support rail is slidably connected to the frame, and the length direction of the auxiliary support rail is the same as the length direction of the track frame.

[0011] By adopting the above technical solution, when the quenching of the fasteners in the furnace body is completed, the hatch of the furnace body is opened, and the hydraulic cylinder is adjusted. The piston rod of the hydraulic cylinder drives the auxiliary support seat to rise until the auxiliary support seat and the bottom wall of the furnace body are located in the same plane, and the auxiliary support track and the top wall of the track frame are located at the same height. Then, the drive motor is adjusted, and the output shaft of the drive motor drives the threaded rod to rotate, and the frame moves along the length direction of the track frame, and then continues to move along the auxiliary support track until the placement frame is completely moved out of the furnace body. Then, the staff can take and place the fasteners to be processed; the designed auxiliary support track is convenient for guiding the placement frame, and at the same time, it is convenient for the placement frame to move out of the furnace body, thereby facilitating the taking and placing of fasteners.

[0012] Optionally, the placement rack also includes an auxiliary support rod installed on each of the threaded sleeves, one end of the auxiliary support rod is hinged to the mesh plate, and the other end is hinged to the threaded sleeve, and the end of the auxiliary support rod rotates along the circumferential direction of the threaded sleeve.

[0013] By adopting the above technical solution, the auxiliary support rod is designed to improve the supporting strength of the mesh plate, avoid damage to the placement frame caused by excessive weight loaded by the fasteners, and extend the service life of the vacuum air-cooled oil quenching furnace.

[0014] Optionally, the quenching device body includes a vacuum component and a heat dissipation component; The heat dissipation assembly includes a heat dissipation frame and a radiator, wherein the heat dissipation frame is mounted on the top wall of the furnace body, and the radiator is mounted on the heat dissipation frame, and the heat dissipation frame and the radiator are located in the inner cavity of the furnace body; The vacuum component is installed on the furnace body, and the vacuum component is used to evacuate the inner cavity of the furnace body.

[0015] By adopting the above technical solution, the designed heat dissipation component is convenient for dissipating heat from the inner cavity of the furnace body, accelerating the cooling of the inner cavity of the furnace body, and improving the cooling effect of the fasteners.

[0016] Optionally, the vacuum assembly includes a vacuum pump, a flow guide cover and an exhaust pipe; The vacuum pump is installed on the furnace body, and the vacuum pump is located at one end of the furnace body away from the auxiliary support seat; The input end of the vacuum pump is connected to the air extraction pipe; One end of the exhaust pipe extending into the inner cavity of the furnace body is connected to the flow guide cover, and the flow guide cover is located in the inner cavity of the furnace body.

[0017] By adopting the above technical solution and adjusting the vacuum pump, under the action of the vacuum pump, the gas in the inner cavity of the furnace body flows into the exhaust pipe along the guide cover and is then discharged along the vacuum pump to achieve vacuum pumping of the inner cavity of the furnace body; the designed vacuum component facilitates vacuum pumping of the inner cavity of the furnace body to achieve vacuum air cooling quenching of fasteners.

[0018] Optionally, the vacuum assembly further comprises a one-way flow member for preventing air backflow, wherein the one-way flow member comprises a connecting pipe, a rubber plug, a threaded plug cap and a return spring; One end of the connecting pipe is connected to the output end of the vacuum pump, and the other end is threadedly connected to the threaded plug cap, and an exhaust hole is opened on the side wall of the connecting pipe; The rubber plug is coaxially installed in the inner cavity of the connecting pipe, and the rubber plug is slidably connected to the connecting pipe; One end of the return spring is fixedly connected to the threaded plug cover, and the other end is fixedly connected to the rubber plug, and the return spring drives the rubber plug to seal the exhaust hole.

[0019] By adopting the above technical scheme, in the process of the vacuum pump evacuating the inner cavity of the furnace body, the gas in the inner cavity of the furnace body flows into the exhaust pipe along the guide cover, and then is discharged to the connecting pipe along the output end of the vacuum pump. The gas flowing into the connecting pipe applies a force to the rubber plug, and the rubber plug applies a force to the reset spring. The reset spring is compressed, causing the rubber plug to move toward the side of the threaded plug cover, and moves until the exhaust hole is connected with the output end of the vacuum pump, thereby realizing the evacuation of the furnace body and further realizing the vacuum air cooling quenching of the fastener. After the inner cavity of the furnace body is in a vacuum state, the vacuum pump stops working, the reset spring recovers, and the reset spring drives the rubber plug to move along the connecting pipe until the rubber plug blocks the exhaust hole. The designed one-way flow component drives the rubber plug to slide along the connecting pipe through the reset spring and air pressure to facilitate the opening or closing of the exhaust hole, so that after the inner cavity of the furnace body is evacuated, the reset spring drives the rubber plug to reset, thereby preventing air from flowing back into the inner cavity of the furnace body, thereby improving the quenching quality of the fastener.

[0020] Optionally, the vacuum assembly also includes a partition, which is arranged near the discharge end of the furnace body; the partition includes a vacuum pump and two groups of air curtain machines, and the two groups of air curtain machines are distributed along the length direction of the furnace body; the air blown out by the air curtain machine forms an air curtain for sealing the outlet of the furnace body, and a partition cavity is formed between the two groups of air curtains, the vacuum pump is installed on the furnace body, and the input end of the vacuum pump is connected to the partition cavity.

[0021] By adopting the above technical solution and the designed partition, a partition cavity is formed through two groups of air curtain machines, so that the processing area of ​​the placement rack is in a vacuum state during the process of the placement rack entering or exiting the furnace body cavity. At the same time, it is prevented that the outside air enters the processing area of ​​the placement rack due to the opening of the furnace door during the process of the placement rack entering and exiting the furnace body cavity.

[0022] Optionally, the partition also includes an air curtain machine installed on the furnace body, and the air curtain machine is located at one end of the furnace body close to the vacuum pump, the air blown out by the air curtain machine forms an air curtain, and the placement rack is located between the air curtain and the air curtain.

[0023] By adopting the above technical solution, the designed air curtain machine is convenient for forming an air curtain, so that a vacuum isolation area for holding the placement rack is formed between the air curtain and the air curtain, thereby facilitating vacuum air cooling and quenching of the fasteners on the placement rack.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The vacuum air-cooled oil quenching furnace designed for fastener production can adjust the distance between two adjacent mesh plates and the height of the mesh plates according to the size specifications of the fasteners through an adjustable placement rack. At the same time, it is convenient to split the stacked fasteners one by one, improve the uniformity of the fastener quenching process, and thus improve the quenching quality of the fasteners; 2. The vacuum air-cooled oil quenching furnace designed for fastener production uses a vacuum component to facilitate vacuuming the furnace cavity to achieve vacuum air-cooling quenching of fasteners; a one-way flow component is used to prevent air from flowing back into the furnace cavity; a partition is used to form a vacuum isolation area for placing the placement rack between the wind curtain and the air curtain, thereby facilitating vacuum air-cooling quenching of the fasteners on the placement rack and improving the quenching quality of the fasteners. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a vacuum air-cooled oil-quenching furnace for fastener production according to Example 1 of the present application; Figure 2 is a cross-sectional view of a vacuum air-cooled oil-quenching furnace for fastener production according to Example 1 of the present application; Figure 3 yes Figure 2 A magnified schematic diagram of part A.

[0026] Description of reference numerals: 1, base; 2, furnace body; 21, furnace chamber; 22, hatch; 23, partition chamber; 3, quenching device body; 31, vacuum assembly; 311, vacuum pump; 312, exhaust pipe; 313, air guide cover; 314, one-way flow member; 3141, connecting pipe; 3142, threaded plug; 3143, rubber plug; 3144, return spring; 3145, exhaust hole; 315, partition; 3151, air curtain; 3152, air Curtain machine; 3153, vacuum machine; 32, heat dissipation assembly; 321, heat dissipation frame; 322, radiator; 323, output motor; 324, impeller; 4, feeding device; 41, placement frame; 411, frame body; 412, mesh plate; 413, threaded sleeve; 414, auxiliary support rod; 415, placement hole; 42, track frame; 43, drive assembly; 431, drive motor; 432, threaded rod; 44, hydraulic cylinder; 45, auxiliary support seat; 46, auxiliary support track. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-3 This application is described in further detail.

[0028] The embodiment of the present application discloses a vacuum air-cooled oil-quenching furnace for fastener production.

[0029] Reference Figure 1 and Figure 2 A vacuum air-cooled oil quenching furnace for fastener production includes a base 1, a furnace body 2, a quenching device body 3 and a feeding device 4. The furnace body 2 is installed on the base 1. In this embodiment, the furnace body 2 is fixed to the base 1 by bolts, and the furnace body 2 is arranged along the length direction of the base 1; the quenching device body 3 is installed on the furnace body 2, and the quenching device body 3 is used for quenching processing of fasteners; the feeding device 4 is installed on the base 1, and the feeding device 4 is used to transport the fasteners to the inner cavity of the furnace body 2 or discharge the furnace body 2.

[0030] Reference Figure 1 and Figure 2The feeding device 4 includes a placement frame 41, a track frame 42, an auxiliary support seat 45, an auxiliary support track 46, a driving assembly 43 and a plurality of hydraulic cylinders 44; the track frame 42 is installed on the bottom wall of the furnace body 2, and the track frame 42 is located in the inner cavity of the furnace body 2, and the track frame 42 is arranged along the length direction of the furnace body 2; the auxiliary support seat 45 is located above the base 1, and the plane where the auxiliary support seat 45 is located is parallel to the plane where the base 1 is located, the auxiliary support seat 45 is arranged close to the discharge end of the furnace body 2, and the auxiliary support seat 45 is in contact with one end of the furnace body 2; a plurality of hydraulic cylinders 44 are installed on the base 1, and the piston rods of the plurality of hydraulic cylinders 44 are fixedly connected to the auxiliary support seat 45. In this embodiment, the hydraulic cylinders 44 can be four, five, or six, as long as the lifting of the auxiliary support seat 45 is realized. In this embodiment, the hydraulic cylinders 44 are arranged in four, and the four hydraulic cylinders 44 are arranged close to the four corners of the auxiliary support seat 45, and the hydraulic The pressure cylinder 44 is fixed to the base 1 by bolts, and the piston rod of the hydraulic cylinder 44 is connected to the auxiliary support seat 45 through a connecting joint; the auxiliary support rail 46 is installed on the auxiliary support seat 45, and the auxiliary support rail 46 is used to receive the placement rack 41, and the placement rack 41 can slide along the auxiliary support rail 46, and the length direction of the auxiliary support rail 46 is the same as the length direction of the track rack 42; in addition, the furnace body 2 includes a furnace cavity 21 and a hatch portion 22, and the furnace cavity 21 is open at one end, and the hatch portion 22 is rotatably connected to the furnace cavity 21, so as to facilitate the sealing of the open end of the furnace cavity 21 through the hatch portion 22. Since the height of the inner wall of the furnace cavity 21 is higher than the lowest point of the hatch portion 22, in order to avoid the hatch portion 22 from interfering with the auxiliary support rail 46 during the rotation process, in the present application, the auxiliary support seat 45 can be raised and lowered, thereby facilitating the hatch portion 22 to seal the furnace cavity 21.

[0031] Reference Figure 1 and Figure 2The placement rack 41 includes a frame 411, multiple mesh plates 412, at least four threaded sleeves 413 rotatably connected to each mesh plate 412, and an auxiliary support rod 414 installed on each threaded sleeve 413; the frame 411 is arranged along the length direction of the furnace body 2, and the frame 411 can slide along the track frame 42 and the auxiliary support track 46; the threaded sleeve 413 is coaxially sleeved on the support rod of the frame 411, and the threaded sleeve 413 is threadedly connected to the support rod of the frame 411. In the present application, the threaded sleeve 413 can be four groups, six groups, or eight groups, as long as the stable support of the mesh plate 412 is achieved. In this embodiment, the threaded sleeve 413 is set to four groups, and the number of groups of the threaded sleeve 413 is the same as the number of support rods of the frame 411. The same; multiple mesh plates 412 are arranged in parallel. In the present application, the mesh plates 412 can be three, four, or five, as long as batch quenching of fasteners can be achieved. In the present embodiment, four mesh plates 412 are arranged, and the four mesh plates 412 are distributed along the height direction of the frame 411, and the number of each group of threaded sleeves 413 is the same as the number of mesh plates 412, and the mesh plates 412 are rotatably connected to the threaded sleeves 413; in addition, a plurality of placement holes 415 for placing fasteners are opened on the mesh plate 412, and a fastener is placed in each placement hole 415; one end of the auxiliary support rod 414 is hinged to the mesh plate 412, and the other end is hinged to the threaded sleeve 413, and the end of the auxiliary support rod 414 rotates along the circumferential direction of the threaded sleeve 413.

[0032] Reference Figure 1 and Figure 2 The driving assembly 43 includes a driving motor 431 and a threaded rod 432. The driving motor 431 is installed on the base 1. In this embodiment, the driving motor 431 is fixed to the base 1 by bolts, and the output shaft of the driving motor 431 is coaxially connected with the threaded rod 432. In this embodiment, the output shaft of the driving motor 431 is fixedly connected with the threaded rod 432 by a coupling; the threaded rod 432 is arranged along the length direction of the furnace body 2, and the threaded rod 432 is rotationally connected to the furnace body 2. One end of the threaded rod 432 extends into the inner cavity of the furnace body 2 and is threadedly connected to the frame 411, so that the frame 411 is driven to move along the axial direction of the threaded rod 432 through the threaded rod 432.

[0033] Reference Figure 2 and Figure 3The quenching device body 3 includes a vacuum component 31 and a heat dissipation component 32; the heat dissipation component 32 is used for heat dissipation in the inner cavity of the furnace body 2, and the heat dissipation component 32 is provided with multiple groups, and the multiple groups of heat dissipation components 32 are evenly arranged along the length direction of the furnace body 2. The heat dissipation component 32 includes an output motor 323, an impeller 324, a heat dissipation frame 321 and a radiator 322. The output motor 323 is installed on the top wall of the furnace body 2, and the output shaft of the output motor 323 extends into the inner cavity of the furnace body 2, and the output motor 323 extends into the furnace The extension section of the inner cavity of the furnace body 2 is fixedly connected to the impeller 324. In the present application, the output motor 323 is key-connected with the impeller 324 to drive the impeller 324 to rotate. In addition, a plurality of exhaust holes are provided on the furnace body 2 to discharge the hot air in the inner cavity of the furnace body 2. The heat sink 321 is installed on the top wall of the furnace body 2, and the radiator 322 is installed on the heat sink 321. The heat sink 321 and the radiator 322 are located in the inner cavity of the furnace body 2. In the present embodiment, the radiator 322 is located below the impeller 324.

[0034] Reference Figure 2 and Figure 3 The vacuum assembly 31 is installed on the furnace body 2, and the vacuum assembly 31 is used to evacuate the inner cavity of the furnace body 2; the vacuum assembly 31 includes a vacuum pump 311, a vacuum pump 3153, a guide cover 313, an exhaust pipe 312, a one-way flow member 314 and a partition 315; the partition 315 includes an air curtain machine 3151, a vacuum pump 3153, a vacuum pump 311 and two sets of air curtain machines 3152, the air curtain machine 3151 and two sets of air curtain machines 3152 are distributed along the length direction of the furnace body 2. The air curtain machine 3151 is installed on the furnace body 2, and the air curtain machine 3151 is located at the end of the furnace body 2 close to the vacuum pump 311. The air blown by the air curtain machine 3151 forms an air curtain, and a transition cavity is formed between the air curtain and the inner end wall of the furnace body 2. The air curtain machine 3152 is installed on the furnace body 2, and the air blown by the air curtain machine 3152 forms an air curtain for blocking the outlet of the furnace body 2. A processing chamber for processing fasteners is formed between the two groups of air curtains, and a partition chamber 23 is formed between the two groups of air curtains. The transition chamber, the processing chamber and the partition chamber 23 are distributed in sequence along the length direction of the furnace body 2; a vacuum pump 311 is installed on the furnace body 2, and the vacuum pump 311 is located at the end of the furnace body 2 away from the hatch portion 22, the input end of the vacuum pump 311 is connected to the exhaust pipe 312, and the exhaust pipe 312 extends into the inner cavity of the furnace body 2 and is connected to the guide cover 313. In the present application, the guide cover 313 is fixed on the inner wall of the furnace body 2, and the guide cover 313 is located in the transition chamber; a vacuum pump 3153 is installed on the furnace body 2, the vacuum pump 3153 is located outside the furnace body 2, and the input end of the vacuum pump 3153 is connected to the partition chamber 23; in addition, the lengths of the processing chamber and the partition chamber 23 are both greater than the total length of the placement rack 41, and the placement rack 41 is located between the wind curtain and the air curtain, so that the placement rack 41 can be vacuum quenched in the processing chamber.

[0035] Reference Figure 2 and Figure 3 The one-way flow member 314 is used to prevent air backflow. The one-way flow member 314 includes a connecting pipe 3141, a rubber plug 3143, a threaded plug cover 3142 and a reset spring 3144. One end of the connecting pipe 3141 is connected to the output end of the vacuum pump 311. In this embodiment, the connecting pipe 3141 is coaxially fixed with the output end of the vacuum pump 311 through a flange, and the other end is threadedly connected to the threaded plug cover 3142. An exhaust hole 3145 is opened on the side wall of the connecting pipe 3141; the rubber plug 3143 is coaxially installed in the inner cavity of the connecting tube 3141, and the rubber plug 3143 is slidingly connected to the connecting tube 3141; one end of the return spring 3144 is fixedly engaged with the threaded plug cover 3142, and the other end is fixedly engaged with the rubber plug 3143, and the return spring 3144 drives the rubber plug 3143 to block the exhaust hole 3145. In this embodiment, the return spring 3144 is in a natural state and the exhaust hole 3145 is located between the threaded plug cover 3142 and the rubber plug 3143.

[0036] The implementation principle of the vacuum air-cooled oil quenching furnace for fastener production in the embodiment of the present application is as follows: during the fastener quenching process, first, the hatch of the furnace body 2 is opened, and the hydraulic cylinder 44 is adjusted. The piston rod of the hydraulic cylinder 44 drives the auxiliary support seat 45 to rise until the auxiliary support seat 45 and the bottom wall of the furnace body 2 are located in the same plane, and the auxiliary support rail 46 and the top wall of the rail frame 42 are located at the same height; then, the drive motor 431 is adjusted, and the output shaft of the drive motor 431 drives the threaded rod 432 to rotate. Since the threaded rod 432 is threadedly connected to the frame 411, the frame 411 moves along the length direction of the rail frame 42. When the frame 411 contacts the auxiliary support rail 46, the frame 411 continues to move, and the frame 411 moves along the auxiliary support rail 46 until the frame 411 is completely moved out of the furnace body 2.

[0037] Then, according to the size specifications of the fastener, the staff rotates the threaded sleeve 413. Since the threaded sleeve 413 is threadedly connected to the support rod of the frame 411, the threaded sleeve 413 moves along the axial direction of the support rod of the frame 411, and the threaded sleeve 413 drives the mesh plate 412 to rise and fall, so that the distance between two adjacent mesh plates 412 is greater than the height of the fastener. The staff then installs the fasteners one by one in the placement hole 415 and adjusts the drive motor 431. The output shaft of the drive motor 431 drives the threaded rod 432 to rotate. Since the threaded rod 432 is threadedly connected to the frame 411, the frame 411 moves along the auxiliary support rail 46, and then moves along the rail frame 42 to the processing chamber, and then the hatch portion 22 is rotated to seal the open end of the furnace body 2.

[0038] Then, the vacuum pump 311 is adjusted, and the gas in the inner cavity of the furnace body 2 flows into the exhaust pipe 312 along the guide cover 313, and then is discharged to the connecting pipe 3141 along the output end of the vacuum pump 311. The gas flowing into the connecting pipe 3141 applies a force to the rubber plug 3143, and the rubber plug 3143 applies a force to the return spring 3144. The return spring 3144 is compressed, so that the rubber plug 3143 moves toward the side of the threaded plug cover 3142, and moves until the exhaust hole 3145 is connected with the output end of the vacuum pump 311, so as to realize the vacuum extraction of the furnace body 2, and then realize the vacuum air cooling quenching of the fastener. After the inner cavity of the furnace body 2 is in a vacuum state, the vacuum pump 311 stops working, the return spring 3144 recovers, and the return spring 3144 drives the rubber plug 3143 to move along the connecting pipe 3141 until the rubber plug 3143 blocks the exhaust hole 3145.

[0039] Then, the air curtain machine 3152 and the wind curtain machine 3151 are adjusted to form a transition chamber, a processing chamber and a partition chamber 23, and then the fasteners are vacuum quenched through the quenching device body 3; after the fasteners are quenched, the hatch 22 is opened, the drive motor 431 is adjusted, and the output shaft of the drive motor 431 drives the threaded rod 432 to rotate, so that the frame 411 moves along the length direction of the track frame 42, and moves along the processing chamber to the partition chamber 23 during the movement of the furnace body 2. In this process, since the partition chamber 23 is in a vacuum state, during the movement of the frame 411 Since the frame 411 blocks the gas from the air curtain machine 3152 from blowing out, after the gas in the partition chamber 23 enters the processing chamber, the processing chamber is still in a vacuum state. When the frame 411 completely moves into the partition chamber 23, the air curtain completely covers it again, so that the processing chamber is still in a vacuum state, preventing external gas from entering the processing chamber. The frame 411 moves along the track frame 42 until the frame 411 contacts the auxiliary support track 46, and then moves along the auxiliary support track 46 until the frame 411 completely moves out of the furnace body 2. The staff removes the fasteners on the mesh plate 412 one by one.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vacuum air-cooled oil-quenching furnace for fastener production, characterized in that: It comprises a base (1), a furnace body (2), a quenching device body (3) and a feeding device (4), wherein the furnace body (2) is mounted on the base (1); The material conveying device (4) comprises a placement rack (41) placed in the inner cavity of the furnace body (2); The placement rack (41) comprises a rack body (411), a plurality of mesh plates (412), and at least four threaded sleeves (413) rotatably connected to each of the mesh plates (412); The frame (411) is arranged along the length direction of the furnace body (2); The threaded sleeve (413) is coaxially sleeved on the support rod of the frame (411), and the threaded sleeve (413) is threadedly connected to the support rod of the frame (411); The plurality of mesh plates (412) are arranged in parallel and distributed along the height direction of the frame (411); the mesh plates (412) are rotatably connected to the threaded sleeve (413); and the mesh plates (412) are provided with a plurality of placement holes (415) for placing each fastener; The quenching device body (3) is installed on the furnace body (2), and the quenching device body (3) is used for quenching processing of fasteners.

2. The vacuum air cooling oil quenching furnace for fastener production according to claim 1, characterized in that: The feeding device (4) comprises a track frame (42) and a driving assembly (43); The track frame (42) is installed on the bottom wall of the furnace body (2), and the track frame (42) is located in the inner cavity of the furnace body (2), and the placement frame (41) can slide along the track frame (42); The driving assembly (43) comprises a driving motor (431) and a threaded rod (432); The driving motor (431) is mounted on the base (1), and the output shaft of the driving motor (431) is coaxially connected to the threaded rod (432); The threaded rod (432) is arranged along the length direction of the furnace body (2), and the threaded rod (432) is rotationally connected to the furnace body (2); the threaded rod (432) passes through the placement rack (41), and the threaded rod (432) is threadedly connected to the placement rack (41).

3. The vacuum air cooling oil quenching furnace for fastener production according to claim 2, characterized in that: The material conveying device (4) further comprises an auxiliary support seat (45), an auxiliary support rail (46) and a plurality of hydraulic cylinders (44); The auxiliary support seat (45) is located above the base (1), and the plane where the auxiliary support seat (45) is located is parallel to the plane where the base (1) is located, and the auxiliary support seat (45) is arranged close to the discharge end of the furnace body (2); The plurality of hydraulic cylinders (44) are mounted on the base (1), and the piston rods of the plurality of hydraulic cylinders (44) are fixedly connected to the auxiliary support seat (45); The auxiliary support rail (46) is installed on the auxiliary support seat (45), the auxiliary support rail (46) is used to receive the frame (411), and the auxiliary support rail (46) is slidably connected to the frame (411), and the length direction of the auxiliary support rail (46) is the same as the length direction of the track frame (42).

4. The vacuum air cooling oil quenching furnace for fastener production according to claim 1, characterized in that: The placement rack (41) also includes an auxiliary support rod (414) installed on each of the threaded sleeves (413), one end of the auxiliary support rod (414) is hinged to the mesh plate (412), and the other end is hinged to the threaded sleeve (413), and the end of the auxiliary support rod (414) rotates along the circumferential direction of the threaded sleeve (413).

5. The vacuum air cooling oil quenching furnace for fastener production according to claim 3, characterized in that: The quenching device body (3) comprises a vacuum component (31) and a heat dissipation component (32); The heat dissipation component (32) comprises a heat dissipation frame (321) and a radiator (322), wherein the heat dissipation frame (321) is mounted on the top wall of the furnace body (2), and the radiator (322) is mounted on the heat dissipation frame (321), and the heat dissipation frame (321) and the radiator (322) are located in the inner cavity of the furnace body (2); The vacuum component (31) is installed on the furnace body (2), and the vacuum component (31) is used to evacuate the inner cavity of the furnace body (2).

6. The vacuum air cooling oil quenching furnace for fastener production according to claim 5, characterized in that: The vacuum assembly (31) comprises a vacuum pump (311), a flow guide cover (313) and an exhaust pipe (312); The vacuum pump (311) is installed on the furnace body (2), and the vacuum pump (311) is located at an end of the furnace body (2) away from the auxiliary support seat (45); The input end of the vacuum pump (311) is connected to the air extraction pipe (312); One end of the exhaust pipe (312) extending into the inner cavity of the furnace body (2) is connected to the air guide cover (313), and the air guide cover (313) is located in the inner cavity of the furnace body (2).

7. The vacuum air cooling oil quenching furnace for fastener production according to claim 6, characterized in that: The vacuum assembly (31) further comprises a one-way flow member (314) for preventing air backflow, wherein the one-way flow member (314) comprises a connecting pipe (3141), a rubber plug (3143), a threaded plug cover (3142) and a return spring (3144); One end of the connecting pipe (3141) is connected to the output end of the vacuum pump (311), and the other end is threadedly connected to the threaded plug cover (3142); an exhaust hole (3145) is provided on the side wall of the connecting pipe (3141); The rubber plug (3143) is coaxially installed in the inner cavity of the connecting pipe (3141), and the rubber plug (3143) is slidably connected to the connecting pipe (3141); One end of the return spring (3144) is fixedly engaged with the threaded plug cover (3142), and the other end is fixedly engaged with the rubber plug (3143), and the return spring (3144) drives the rubber plug (3143) to seal the exhaust hole (3145).

8. The vacuum air cooling oil quenching furnace for fastener production according to claim 6, characterized in that: The vacuum assembly (31) further comprises a partition (315), wherein the partition (315) is arranged close to the discharge end of the furnace body (2); the partition (315) comprises a vacuum pump (3153) and two groups of air curtain machines (3152), wherein the two groups of air curtain machines (3152) are distributed along the length direction of the furnace body (2); the air blown out by the air curtain machine (3152) forms an air curtain for blocking the outlet of the furnace body (2), and a partition cavity (23) is formed between the two groups of air curtains; the vacuum pump (3153) is installed on the furnace body (2), and the input end of the vacuum pump (3153) is connected to the partition cavity (23).

9. The vacuum air cooling oil quenching furnace for fastener production according to claim 8, characterized in that: The partition (315) further comprises an air curtain machine (3151) installed on the furnace body (2), and the air curtain machine (3151) is located at one end of the furnace body (2) close to the vacuum pump (311), the air blown out by the air curtain machine (3151) forms an air curtain, and the placement rack (41) is located between the air curtain and the air curtain.

Images