WO2017036053A1 - Heating furnace for carburizing or carbonitriding - Google Patents

Heating furnace for carburizing or carbonitriding Download PDF

Info

Publication number
WO2017036053A1
WO2017036053A1 PCT/CN2016/000064 CN2016000064W WO2017036053A1 WO 2017036053 A1 WO2017036053 A1 WO 2017036053A1 CN 2016000064 W CN2016000064 W CN 2016000064W WO 2017036053 A1 WO2017036053 A1 WO 2017036053A1
Authority
WO
WIPO (PCT)
Prior art keywords
furnace
section
carburizing
heating
furnace body
Prior art date
Application number
PCT/CN2016/000064
Other languages
French (fr)
Chinese (zh)
Inventor
戚顺银
魏长富
李振明
Original Assignee
唐山亚捷机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 唐山亚捷机械有限公司 filed Critical 唐山亚捷机械有限公司
Publication of WO2017036053A1 publication Critical patent/WO2017036053A1/en

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20—Carburising
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/28—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases more than one element being applied in one step
    • C23C8/30—Carbo-nitriding

Definitions

  • the invention relates to a heating furnace, in particular to a heating furnace for carburizing or carbonitriding.
  • the lower layer workpiece is pressed by the upper layer workpiece after heating, which is easy to cause adhesion and deformation, affecting the quality of the workpiece; subject to the production form, the medium and small workpiece multi-layer converter can only be transferred and quenched by the whole, very Achieve limited quenching of a single piece.
  • the pusher furnace is suitable for medium-sized parts.
  • the lower part of the workpiece is easy to stick and the workpiece is inconvenient to transfer.
  • the heating waste of the partition is increased, which is not conducive to the limited quenching transfer.
  • the rotary hearth furnace can be transferred in one piece and matched with the limited quenching press for limited quenching, other furnaces need to be carburized by the structure, and then repeated heating on the rotary hearth furnace, which wastes a lot of energy. .
  • the invention aims to solve the above problems, thereby providing a process for realizing carburizing or carbonitriding of a workpiece in the same furnace, and capable of fully automatic limited quenching of a single workpiece, improving production efficiency and reducing deformation of the workpiece.
  • a furnace for carburizing or carbonitriding is a furnace for carburizing or carbonitriding.
  • the present invention solves the problem, and the technical solution adopted is:
  • a heating furnace for carburizing or carbonitriding comprising a furnace body, an inlet furnace door and an outlet furnace door arranged on the furnace body, the inlet furnace door and the outlet furnace door are respectively located at the feeding end and the outlet of the furnace body
  • a furnace gas circulation device is arranged in the furnace body, and a partition wall with a through hole is arranged in the furnace body, and a plurality of rollers passing through the through holes are arranged from the feeding end to the discharge end, and each layer of the rollers is respectively and respectively Drive connection.
  • the workpiece is carburized or carbonitrided, the workpiece is flexible and convenient to move on the stick, there is no contact between the workpieces, there is no adhesion phenomenon, no dead layer between the workpiece and the workpiece, between the workpiece and the tray, seepage
  • the layer structure is more uniform, and it is also possible to realize fully automatic limited quenching of a single piece of workpiece.
  • the furnace body is provided with a roller bar layer, which greatly reduces the furnace length and reduces the equipment investment cost. Improve production efficiency while reducing the amount of deformation of the workpiece, reducing the amount of processing in subsequent processes.
  • the feeding end of the furnace body is provided with an inlet section and a preheating section in sequence, and the partition wall sequentially divides the furnace body into a heating section, a strong infiltration section, a diffusion section and a cooling section. Carburizing or carbonitriding processes such as preheating, heating, strong seepage, diffusion, and cooling in the same furnace are realized.
  • the height of the furnace at the inlet section and the preheating section is the same, and the height of the furnace in the heating section, the strong infiltration section, the diffusion section and the cooling section is the same, and the furnace height in the inlet section is smaller than the furnace height in the heating section.
  • the waste heat of the waste furnace gas from the heating zone can be used to dry and preheat the workpiece, and the flow of the furnace gas is used to take the steam out of the furnace, and at the same time, the influence on the gas flow in the furnace when opening and closing the inlet door is minimized. .
  • the first driving device in the driving device is installed at a position outside the furnace body corresponding to the front end of the inlet section, and the second driving device in the driving device is installed at a position outside the furnace body corresponding to the front end of the heating section, and the third driving device in the driving device Installed outside the furnace The corresponding position in the second half of the cooling section.
  • a sealing door that can move up and down is provided between the inlet section and the preheating section.
  • the sealing door is closed.
  • the inlet furnace door is closed and the sealing door is opened. This prevents the furnace gas from being leaked out during the workpiece charging process, resulting in waste of resources and affecting the workpiece. Heating quality.
  • the number of rollers in the furnace body is 2 to 10 layers. According to the process time of carburizing or carbonitriding required, the number of layers of the roller bar is reasonably designed, thereby greatly reducing the furnace length and reducing the equipment investment cost.
  • the outlet furnace door is arranged obliquely at the discharge end of the furnace body through a transmission device, and the outlet furnace door is provided with a partial outlet and a partial sealing door.
  • the outlet door is provided with a partial outlet and a partial sealing door.
  • the outlet door can be tilted up and down through the transmission system, and the opening is moved to the roller layer where the workpiece needs to be taken out, and the partial sealing door is opened, so that the workpiece can be easily taken out and the workpiece can be removed.
  • the outlet door is moved up and down to align the outlet opening with any layer of roller rods to realize the discharge of any one layer of the workpiece.
  • a loading platform is arranged on one side of the feeding end of the furnace body, and a feeding roller is arranged on the loading table, a horizontal moving device and a lifting device are arranged under the loading table, and a discharge table is arranged on one side of the discharging end, and the discharging device is arranged.
  • the table has the same structure as the loading station. It can realize the separate feeding and discharging of the workpiece on any one of the roller bars, which is convenient for automatic limiting quenching of the workpiece.
  • the first fast and slow drive motor in the first driving device is coaxially connected with the first driving sprocket, the first driving sprocket is connected to the first driven sprocket through the first chain, and the first driven sprocket is placed in the furnace a position corresponding to the middle portion of the preheating section in vitro;
  • the slow driving motor in the second driving device is coaxially connected with the second driving sprocket, and the second driving sprocket is connected to the second driven sprocket through the second chain,
  • the second driven sprocket is placed at a position corresponding to the middle of the cooling section outside the furnace;
  • the second fast and slow driving motor in the third driving device is coaxially connected with the third driving sprocket, and the third driving sprocket passes the third
  • the chain is connected to the third driven sprocket, and the third driven sprocket is placed at a position corresponding to the tail of the cooling section outside the furnace.
  • the first fast and slow speed switching motor realizes the movement of the workpiece fast converter and the slow furnace; the slow speed motor realizes different heat treatment processes of the workpiece in the furnace; the second fast and slow switching motor is set for each layer of the lower half of the cooling section First, slowly move the workpiece to the fast stick and then quickly transfer it out to reduce the transfer time.
  • the number of the first fast slow drive motor, the slow drive motor, and the second fast slow drive motor are respectively set to match the number of layers of the idler. Different roller layers are driven by different fast and slow motors to facilitate the stratification of the workpiece.
  • the driving device comprises a first fast and slow switching motor arranged in the inlet section and the preheating section, a slow motor arranged in the heating half section, the strong infiltration section, the diffusion section and the first half of the cooling section, and the second part arranged in the second half of the cooling section.
  • FIG. 1 is a schematic structural view of an embodiment of the present invention.
  • Figure 2 is a partial enlarged view of A in Figure 1.
  • Figure 3 is a partial enlarged view of B in Figure 1.
  • Figure 4 is a schematic view showing the connection structure of different idler layers and motors.
  • loading station 1 feeding roller 101, horizontal driving motor 102, lifting device 103, horizontal driving driving sprocket 104, horizontal driving driven sprocket 105, feeding roller 106, cylinder 107, inlet furnace door 2
  • the third drive sprocket 10 the third driven sprocket 11, the third chain 12, the second chain 13, the first chain 14, the first fast and slow drive motor 15, the workpiece 16, and the idler 17.
  • the inlet furnace door 2 and the outlet furnace door 3 are provided on the furnace body 7, and the inlet furnace door 2 and the outlet furnace door are divided into 3 points. It is not located at the feeding end and the discharging end of the furnace body 7.
  • the furnace body 7 is provided with a furnace gas circulation device: a circulation fan 213.
  • the heating section 203, the strong infiltration section 204, the diffusion section 205 and the temperature decreasing section 206 in the furnace body 7 are provided with a circulation fan 213, and the furnace gas circulates independently in each section, and mutual interference is small.
  • a partition wall 214 having a through hole 211 is disposed in the furnace body 7.
  • the partition wall 214 sequentially divides the space in the furnace body 7 into a temperature rising section 203, a strong infiltration section 204, an expansion section 205, and a temperature decreasing section 206.
  • a plurality of layers (three layers in this embodiment) are passed through the through rollers 17 of the through holes 211 from the feed end to the discharge end, and each of the rolls 17 is connected to a respective driving device.
  • the feed end of the furnace body 7 is provided with an inlet section 201 and a preheating section 202 in this order.
  • the furnace section height of the inlet section 201 and the preheating section 202 is the same, and the furnace heights of the heating section 203, the strong infiltration section 204, the diffusion section 205 and the cooling section 206 are the same, and the inlet section 201 furnace height is smaller than the heating section 203 furnace height.
  • the furnace height of the inlet section 201 and the preheating section 202 is much smaller than the furnace height of the heating section 203, the strong infiltration section 204, the diffusion section 205 and the cooling section 206, and the waste heat of the waste furnace gas from the heating section 203 can be utilized for the workpiece 16 Drying and preheating, and using the flow of the furnace gas to bring the water vapor out of the furnace, while minimizing the influence on the airflow in the furnace when opening and closing the inlet furnace door, and also preheating the workpiece 16 in the same furnace Carburizing or carbonitriding processes such as temperature rise, strong seepage, diffusion, and cooling.
  • the first driving device in the driving device is installed at a position outside the furnace body 7 corresponding to the front end of the inlet portion 201, and the first fast and slow driving motor 15 in the first driving device is coaxially connected with the first driving sprocket 5,
  • a drive sprocket 5 is coupled to the first driven sprocket 6 via a first chain 14, and the first driven sprocket 6 is placed outside the furnace body 7 at a position corresponding to the middle of the preheating section 202.
  • a first intermediate sprocket that is movably engaged with the first chain 14 is disposed between the first drive sprocket 5 and the first driven sprocket 6, and the first drive sprocket 5 is axially coupled to the first driven sprocket 6
  • a roller 17 is mounted on the first intermediate sprocket shaft, and the idler roller 17 is used to carry the workpiece 16.
  • the second driving device in the driving device is installed at a position outside the furnace body 7 corresponding to the front end of the heating section 203, and the slow motor in the second driving device is coaxially connected with the second driving sprocket 8, and the second driving sprocket shaft 8 is connected.
  • a roller is mounted thereon, the second drive sprocket 8 is coupled to the second driven sprocket 9 via the second chain 13, and the second driven sprocket 9 is provided with a roller on the shaft, the second drive sprocket 8 and the second driven sprocket
  • a second intermediate sprocket is movably coupled between the sprocket 9 and the second chain 13.
  • the second intermediate chain is also provided with a roller on the shaft, and the second driven sprocket 9 is placed outside the furnace body 7. The position corresponding to the middle of the cooling section 206.
  • the third driving device in the driving device is installed at a position outside the furnace body 7 corresponding to the second half of the cooling section 206; the second fast slow driving motor in the third driving device is coaxially connected with the third driving sprocket 10,
  • the second driving sprocket 10 is equipped with a roller on the shaft, the third driving sprocket 10 is connected to the third driven sprocket 11 through the third chain 12, and the third driven sprocket 11 is equipped with a roller on the shaft, and the third active chain
  • a third intermediate sprocket is provided between the wheel 10 and the third driven sprocket 11 in a dynamic engagement with the third chain 12.
  • the third intermediate sprocket is provided with a roller, and the third driven sprocket 11 is placed in the furnace. The position outside the body 7 corresponding to the tail of the cooling section 206.
  • the furnace body 7 is horizontally disposed with three layers of rollers 17 penetrating the partition wall from the feeding end to the discharge end, and the idler rollers 17 are independently driven by the layered segments, and the inlet section 201 and the preheating section 202 of each layer of the idler rollers 17 are respectively driven.
  • the first fast and slow switching motor 15 is arranged, the heating unit 203, the strong infiltration section 204, the diffusion section 205 and the cooling section 206 are provided with a slow motor in the first half, and the second half of the cooling section 206 is provided with a second fast and slow switching motor, the inlet section.
  • each of the rollers 17 is provided with a first fast and slow switching motor 15 to realize the movement of the workpiece 16 in the fast converter and the slow furnace, the preheating section 202, the heating section 203, the strong infiltration section 204, the diffusion section 205 and the first half of the cooling section 206.
  • Each layer of the roller is provided with a slow motor to realize different heat treatment processes of the workpiece 16 in the furnace; in the second half of the cooling section 206, each of the rollers 17 is provided with a second fast and slow switching motor, and the workpiece 16 is slowly moved to a fast speed.
  • the multi-layer idler 17 is arranged, and the layered and segmented independent drive design, the workpiece 16 is continuous on the peg 17 in a single piece, single row or multiple rows. Movement, no contact between workpieces 16, no adhesion, work efficiency and heat treatment quality Large increase.
  • a sealing door 212 that can move up and down is disposed between the inlet section 201 and the preheating section 202.
  • the off The sealing door 212 is closed.
  • the inlet furnace door 2 is closed, and the sealing door 212 is opened. This prevents the furnace gas from being leaked out during the loading process of the workpiece 16, causing waste of resources and affecting the workpiece. 16 heating quality.
  • the outlet furnace door 3 is obliquely disposed at the discharge end of the furnace body 7 through a transmission 303 (using a chain), and the outlet furnace door 3 is provided with a partial outlet 301 and a partial sealing door 302.
  • the opening on the partial sealing door 302 slides to the position of the workpiece layer that needs to enter and exit the furnace, and is used for the entry and exit of the workpiece 16, effectively preventing the leakage of the furnace gas, and avoiding the outside air from entering the furnace, saving energy and improving the workpiece 16 Heating efficiency.
  • the outlet furnace door 3 is slid in the sealing cavity of the discharge end of the furnace body 7 through the transmission device, and the sealing chamber is disposed in the furnace body 7 in an inclined state, and the door body of the outlet furnace door is pressed against the inclined surface of the sealing chamber by gravity. Its circumference is sealed.
  • the opening size of the partial outlet 301 is 1/4 to 1/3 of the size of the furnace mouth, and the leakage of the furnace gas is minimized when the outlet door is opened, so that outside air is prevented from entering the furnace.
  • the outlet furnace door 3 is a completely sealed structure, and a sealing ring is arranged at the joint of the furnace mouth, and a cylinder pressing device is arranged on the furnace door to complete the sealing of the furnace mouth.
  • the outer wall of the furnace body 7 to which the outlet door 3 is attached has an annular groove structure, and the annular groove structure is provided with a cooling device; the deformation of the furnace mouth affected by the temperature is reduced, and the sealing property is maintained.
  • the transmission 303 is a chain transmission structure that is moved by the chain to move the partial sealing door 302 into the desired ejection position within the sealed chamber.
  • the partial outlet 301 is moved to the layer of the idler 17 where the workpiece 16 needs to be taken out, and the partial sealing door 302 is opened, so that the workpiece 16 can be easily taken out to avoid convection of the furnace gas with the outside air, and the outlet furnace door 3 is used for sealing when the furnace is not discharged.
  • the effect of the furnace gas on the cooling section 206 is minimized when the workpiece 16 is discharged, and the outlet furnace door 3 is moved up and down to be aligned with any one of the rollers 16 to realize the discharge of any one of the workpieces 16.
  • a loading station 1 is disposed on one side of the feeding end of the furnace body 7.
  • the loading table 1 is provided with a feeding roller 106.
  • the loading table 1 is provided with a horizontal moving device and a lifting device 103, and one side of the discharging end is provided.
  • the discharge table 4 has the same structure as the loading table: a horizontal moving device and a lifting device are also provided.
  • the horizontal moving device is composed of a horizontal driving motor 102 mounted on the bracket of the loading platform 1, a horizontal driving driving sprocket 104, a horizontal driving driven sprocket 105, a cylinder 107, and the like, and an output shaft of the horizontal driving motor 102 drives the center sprocket.
  • the lifting device 103 uses the elevator to drive the loading table 1 for lifting and lowering, so that the workpiece 16 can be aligned with different roller layers, and the workpiece 16 of different layers can be loaded.
  • the waste furnace gas from the temperature rising section 203 moves in the opposite direction to the workpiece 16, and the workpiece 16 is dried and preheated by the waste heat of waste, and the flow of the furnace gas is utilized.
  • the water vapor is taken out of the furnace. Since the height of the furnace in these two working sections is low and the distance is long, the external airflow is not easy to affect the furnace inside the furnace when the furnace is installed.
  • the heating section 203 since there is a small amount of rich gas from the strong infiltration section, only nitrogen gas needs to be introduced into the drip port, and as the workpiece moves slowly, the workpiece 16 is gradually heated to be suitable for carburizing or carbonitriding. temperature.
  • the workpiece 16 maintains a temperature suitable for carburizing or carbonitriding in the strong infiltration section 204, and at the same time, a protective gas and an enriched gas are introduced for carburizing or carbonitriding according to the process requirements.
  • the workpiece 16 continues to maintain a temperature suitable for carburization or carbonitriding in the diffusion section 205, while reducing the amount of enriched gas to be diffused, so that carbon or carbon and nitrogen permeating into the workpiece are diffused, thereby making the layered structure uniform.
  • the workpiece 16 is cooled in the temperature decreasing section 206 according to the process requirements to a temperature suitable for quenching, and the shielding gas and the rich gas are introduced according to the process requirements.
  • the continuous movement of the workpiece 16 in the same furnace passes through different process stages, and the carburizing or carbonitriding process is realized. Since the workpiece 16 is a single layer rolling on the idler 1, the workpiece and the workpiece, the workpiece and the material are cast. The dead angle of the layer between the discs makes the layered structure more uniform.
  • the idler 17 at the through hole 211 of the partition wall 214 has the same pitch as the other position idler 17, and the idler 17 has a small pitch, and the workpiece 16 of the diameter of 80 mm or more (without the loading tray) ) can be passed directly.
  • the workpiece loading furnace the lifting device 103 lifts or lowers the loading table 1 to the same height as the to-be-loaded roller 17, the inlet furnace door 2 is opened, and the horizontal moving device moves the workpiece 16 into the furnace to make the feeding roller 106 and the furnace
  • the inner roller is docked; the idler 17 is fast rotated to transport the workpiece 16 to the inlet section 201, the loading station 1 is removed from the furnace body, and the inlet furnace door 2 is closed to complete the furnace installation.
  • the workpiece is discharged: when the detecting grating detects that the workpiece 16 has reached the lower idle roller 17 of the cooling section 206, the outlet door 3 moves, so that the partial outlet 301 reaches the position of the corresponding discharging roller layer, and the partial sealing door 302 is opened.
  • the second lifting device on the discharge table 4 raises or lowers the discharge roller to the same height as the idler to be discharged, and the second horizontal moving device moves the discharge roller into the furnace to make the roller and the furnace.
  • the inner roller is docked, the roller rotates fast, and the workpiece 16 is conveyed to the discharge roller of the discharge table.
  • the partial sealing door 302 is immediately closed to maintain the atmosphere inside the furnace. .

Abstract

Provided is a heating furnace for carburizing or carbonitriding, comprising a furnace body (7) and an entrance furnace gate (2) and an exit furnace gate (3) provided on the furnace body (7). The entrance furnace gate (2) and the exit furnace gate (3) are located at a feed end and a discharge end of the furnace body (7) respectively; a furnace gas circulation device (213) is provided in the furnace body (7); partition walls (214) with a through hole (211) are provided in the furnace body (7); multiple layers of carrier rollers (17) extending through the through holes (211) are provided from the feed end to the discharge end, and each layer of the carrier rollers (17) is connected to a respective driving device.

Description

用于渗碳或碳氮共渗的加热炉Heating furnace for carburizing or carbonitriding 技术领域Technical field
本发明涉及加热炉，具体是一种用于渗碳或碳氮共渗的加热炉。The invention relates to a heating furnace, in particular to a heating furnace for carburizing or carbonitriding.
背景技术Background technique
目前诸如轴承套圈、齿套、锥齿或弧形齿轮等中小型零件在加热炉进行长周期渗碳或碳氮共渗淬火工艺时，存在着单件转移困难、工件间容易粘连，工件变形大、有的限型淬火时需要二次重复加热，能耗高等诸多问题。At present, small and medium-sized parts such as bearing rings, toothed sleeves, bevel gears or curved gears have difficulty in single-piece transfer, easy adhesion between workpieces, and workpiece deformation during long-period carburizing or carbonitriding quenching. Large and limited quenching requires secondary heating, high energy consumption and many other problems.
例如箱式多用炉在装件时，下层工件在加热后受上层工件的压迫，容易造成粘连及变形，影响工件质量；受制于生产形式，中小工件多层转炉时只能被整体转移淬火，很实现单件的限型淬火。For example, when the box type multi-purpose furnace is installed, the lower layer workpiece is pressed by the upper layer workpiece after heating, which is easy to cause adhesion and deformation, affecting the quality of the workpiece; subject to the production form, the medium and small workpiece multi-layer converter can only be transferred and quenched by the whole, very Achieve limited quenching of a single piece.
推盘炉适用于中型零件，同样下层工件容易粘连，工件转移不便；使用隔盘时又增加了隔盘的加热浪费，不利于进行限型淬火转移。The pusher furnace is suitable for medium-sized parts. The lower part of the workpiece is easy to stick and the workpiece is inconvenient to transfer. When the partition is used, the heating waste of the partition is increased, which is not conducive to the limited quenching transfer.
转底炉虽可单件转移并与限型淬火压床配套进行限型淬火，但受其结构影响需要其他炉子进行渗碳处理，然后在转底炉上进行二次重复加热，浪费了大量能源。Although the rotary hearth furnace can be transferred in one piece and matched with the limited quenching press for limited quenching, other furnaces need to be carburized by the structure, and then repeated heating on the rotary hearth furnace, which wastes a lot of energy. .
发明内容Summary of the invention
本发明旨在解决上述问题，从而提供一种在同一炉膛内实现工件渗碳或碳氮共渗工艺，并能够实现单件工件全自动限型淬火，提高生产效率同时减少工件变形量的用于渗碳或碳氮共渗的加热炉。The invention aims to solve the above problems, thereby providing a process for realizing carburizing or carbonitriding of a workpiece in the same furnace, and capable of fully automatic limited quenching of a single workpiece, improving production efficiency and reducing deformation of the workpiece. A furnace for carburizing or carbonitriding.
本发明解决所述问题，采用的技术方案是：The present invention solves the problem, and the technical solution adopted is:
一种用于渗碳或碳氮共渗的加热炉，包括炉体，设置在炉体上的入口炉门、出口炉门，入口炉门和出口炉门分别位于炉体的进料端和出料端，炉体内设置有炉气循环装置，炉体内设置有带贯通孔的隔墙，从进料端到出料端设置有多层穿过贯通孔的托辊，每层托辊分别与各自的驱动装置连接。A heating furnace for carburizing or carbonitriding, comprising a furnace body, an inlet furnace door and an outlet furnace door arranged on the furnace body, the inlet furnace door and the outlet furnace door are respectively located at the feeding end and the outlet of the furnace body At the material end, a furnace gas circulation device is arranged in the furnace body, and a partition wall with a through hole is arranged in the furnace body, and a plurality of rollers passing through the through holes are arranged from the feeding end to the discharge end, and each layer of the rollers is respectively and respectively Drive connection.
采用上述技术方案的本发明，与现有技术相比，其突出的特点是：The present invention adopting the above technical solution has outstanding features compared with the prior art:
①在同一炉膛内实现工件渗碳或碳氮共渗工艺，工件在棍棒上移动灵活方便，工件间无接触，不存在粘连现象，工件与工件间、工件与料盘间无渗层死角，渗层组织更加均匀，也能够实现单件工件全自动限型淬火。1In the same furnace, the workpiece is carburized or carbonitrided, the workpiece is flexible and convenient to move on the stick, there is no contact between the workpieces, there is no adhesion phenomenon, no dead layer between the workpiece and the workpiece, between the workpiece and the tray, seepage The layer structure is more uniform, and it is also possible to realize fully automatic limited quenching of a single piece of workpiece.
②炉体内设置有辊棒层，大幅减小炉长，降低设备投资成本。提高生产效率同时减少工件的变形量，降低后续工序的加工量。2 The furnace body is provided with a roller bar layer, which greatly reduces the furnace length and reduces the equipment investment cost. Improve production efficiency while reducing the amount of deformation of the workpiece, reducing the amount of processing in subsequent processes.
作为优选，本发明更进一步的技术方案是：Preferably, a further technical solution of the present invention is:
炉体的进料端依次设置有入口段和预热段，隔墙依次将炉体分为升温段、强渗段、扩散段和降温段。实现工件在同一炉膛内的预热、升温、强渗、扩散、降温等渗碳或碳氮共渗工艺。The feeding end of the furnace body is provided with an inlet section and a preheating section in sequence, and the partition wall sequentially divides the furnace body into a heating section, a strong infiltration section, a diffusion section and a cooling section. Carburizing or carbonitriding processes such as preheating, heating, strong seepage, diffusion, and cooling in the same furnace are realized.
入口段和预热段的炉膛高度相同，升温段、强渗段、扩散段和降温段的炉膛高度相同，入口段炉膛高度小于升温段炉膛高度。可以利用从升温段出来的废炉气的余热对工件进行烘干预热，并利用炉气的流动将水蒸汽带出炉外，同时最大程度削弱在开闭入口炉门时对炉内气流的影响。The height of the furnace at the inlet section and the preheating section is the same, and the height of the furnace in the heating section, the strong infiltration section, the diffusion section and the cooling section is the same, and the furnace height in the inlet section is smaller than the furnace height in the heating section. The waste heat of the waste furnace gas from the heating zone can be used to dry and preheat the workpiece, and the flow of the furnace gas is used to take the steam out of the furnace, and at the same time, the influence on the gas flow in the furnace when opening and closing the inlet door is minimized. .
驱动装置中的第一驱动装置装在炉体外与入口段前端相对应的位置，驱动装置中的第二驱动装置装在炉体外与升温段前端相对应的位置，驱动装置中的第三驱动装置装在炉体外与 降温段后半部相对应的位置。The first driving device in the driving device is installed at a position outside the furnace body corresponding to the front end of the inlet section, and the second driving device in the driving device is installed at a position outside the furnace body corresponding to the front end of the heating section, and the third driving device in the driving device Installed outside the furnace The corresponding position in the second half of the cooling section.
入口段和预热段之间设置有能够上下移动的密封门。当工件装炉时，关闭密封门，当工件进入入口段装炉完毕后，关闭入口炉门，打开密封门，这样可以防止炉气在工件装炉过程中大量外泄，造成资源浪费，影响工件加热质量。A sealing door that can move up and down is provided between the inlet section and the preheating section. When the workpiece is installed in the furnace, the sealing door is closed. When the workpiece enters the inlet section, the inlet furnace door is closed and the sealing door is opened. This prevents the furnace gas from being leaked out during the workpiece charging process, resulting in waste of resources and affecting the workpiece. Heating quality.
炉体内的托辊层数为2～10层。据所需渗碳或碳氮共渗的工艺时间，合理设计辊棒的层数，从而大幅降低炉长，减少设备投资成本。The number of rollers in the furnace body is 2 to 10 layers. According to the process time of carburizing or carbonitriding required, the number of layers of the roller bar is reasonably designed, thereby greatly reducing the furnace length and reducing the equipment investment cost.
出口炉门通过传动装置倾斜设置在炉体的出料端，出口炉门上设置有局部出口和局部密封门。出口炉门上设置有局部出口和局部密封门，出口炉门通过传动***可上下倾斜滑动，将开口移动至需要取出工件的辊棒层处，打开局部密封门，可方便取出工件，使在工件出料时对降温段炉气的影响降到最低，出口炉门上下移动将局出开口对准任意一层辊棒，实现任意一层工件的出料。The outlet furnace door is arranged obliquely at the discharge end of the furnace body through a transmission device, and the outlet furnace door is provided with a partial outlet and a partial sealing door. The outlet door is provided with a partial outlet and a partial sealing door. The outlet door can be tilted up and down through the transmission system, and the opening is moved to the roller layer where the workpiece needs to be taken out, and the partial sealing door is opened, so that the workpiece can be easily taken out and the workpiece can be removed. When the material is discharged, the influence of the furnace gas in the cooling section is minimized, and the outlet door is moved up and down to align the outlet opening with any layer of roller rods to realize the discharge of any one layer of the workpiece.
炉体的进料端的一侧设置有装料台，装料台上设置有送料托辊，装料台下方装有水平移动装置和升降装置，出料端的一侧设置有出料台，出料台与装料台结构相同。可实现任意一层辊棒上的工件的单独进料和出料，便于实现工件的自动限型淬火。A loading platform is arranged on one side of the feeding end of the furnace body, and a feeding roller is arranged on the loading table, a horizontal moving device and a lifting device are arranged under the loading table, and a discharge table is arranged on one side of the discharging end, and the discharging device is arranged. The table has the same structure as the loading station. It can realize the separate feeding and discharging of the workpiece on any one of the roller bars, which is convenient for automatic limiting quenching of the workpiece.
第一驱动装置中的第一快慢速驱动电机与第一主动链轮同轴连接，第一主动链轮通过第一链条与第一从动链轮连接，第一从动链轮置于炉体外与预热段的中部相对应的位置；第二驱动装置中的慢速驱动电机与第二主动链轮同轴连接，第二主动链轮通过第二链条与第二从动链轮连接，第二从动链轮置于炉体外与降温段中部相对应的位置；第三驱动装置中的第二快慢速驱动电机与第三主动链轮同轴连接，第三主动链轮通过第三链条与第三从动链轮连接，第三从动链轮置于炉体外与降温段尾部相对应的位置。第一快慢速切换电机，实现工件快速转炉与慢速炉内移动；慢速电机，实现工件在炉内的不同热处理工艺；降温段后半部每层托辊设置第二快慢速切换电机，先将工件慢速移动到快速棍棒上，然后快转出炉，减少转移时间。The first fast and slow drive motor in the first driving device is coaxially connected with the first driving sprocket, the first driving sprocket is connected to the first driven sprocket through the first chain, and the first driven sprocket is placed in the furnace a position corresponding to the middle portion of the preheating section in vitro; the slow driving motor in the second driving device is coaxially connected with the second driving sprocket, and the second driving sprocket is connected to the second driven sprocket through the second chain, The second driven sprocket is placed at a position corresponding to the middle of the cooling section outside the furnace; the second fast and slow driving motor in the third driving device is coaxially connected with the third driving sprocket, and the third driving sprocket passes the third The chain is connected to the third driven sprocket, and the third driven sprocket is placed at a position corresponding to the tail of the cooling section outside the furnace. The first fast and slow speed switching motor realizes the movement of the workpiece fast converter and the slow furnace; the slow speed motor realizes different heat treatment processes of the workpiece in the furnace; the second fast and slow switching motor is set for each layer of the lower half of the cooling section First, slowly move the workpiece to the fast stick and then quickly transfer it out to reduce the transfer time.
第一快慢速驱动电机、慢速驱动电机和第二快慢速驱动电机设置的个数分别与托辊的层数相适应。不同的托辊层通过不同的快慢速电机进行驱动，利于工件的分层进出。The number of the first fast slow drive motor, the slow drive motor, and the second fast slow drive motor are respectively set to match the number of layers of the idler. Different roller layers are driven by different fast and slow motors to facilitate the stratification of the workpiece.
驱动装置包括设置在入口段和预热段的第一快慢速切换电机、设置在升温段、强渗段、扩散段和降温段前半部的慢速电机、设置在降温段后半部的第二快慢速切换电机，The driving device comprises a first fast and slow switching motor arranged in the inlet section and the preheating section, a slow motor arranged in the heating half section, the strong infiltration section, the diffusion section and the first half of the cooling section, and the second part arranged in the second half of the cooling section. Two fast and slow speed switching motors,
附图说明DRAWINGS
图1是本发明实施例结构示意图。1 is a schematic structural view of an embodiment of the present invention.
图2是图1中A的局部放大图。Figure 2 is a partial enlarged view of A in Figure 1.
图3是图1中B的局部放大图。Figure 3 is a partial enlarged view of B in Figure 1.
图4是不同托辊层与电机连接结构示意图。Figure 4 is a schematic view showing the connection structure of different idler layers and motors.
图中：装料台1、送料托辊101、水平驱动电机102、升降装置103、水平驱动主动链轮104、水平驱动从动链轮105、送料托辊106、气缸107，入口炉门2、入口段201、预热段202、升温段203、强渗段204、扩散段205、降温段206、贯通孔211、密封门212、循环风扇213、隔墙214、出口炉门3、局部出口301、局部密封门302、传动装置303、出料台4、第一主动链轮5、第一从动链轮6、炉体7、第二主动链轮8、第二从动链轮9、第三主动链轮10、第三从动链轮11、第三链条12、第二链条13、第一链条14、第一快慢速驱动电机15、工件16、托辊17。In the figure: loading station 1, feeding roller 101, horizontal driving motor 102, lifting device 103, horizontal driving driving sprocket 104, horizontal driving driven sprocket 105, feeding roller 106, cylinder 107, inlet furnace door 2 The inlet section 201, the preheating section 202, the heating section 203, the strong infiltration section 204, the diffusion section 205, the cooling section 206, the through hole 211, the sealing door 212, the circulation fan 213, the partition wall 214, the outlet furnace door 3, and the partial outlet 301 a partial sealing door 302, a transmission 303, a discharge table 4, a first driving sprocket 5, a first driven sprocket 6, a furnace body 7, a second driving sprocket 8, and a second driven sprocket 9, The third drive sprocket 10, the third driven sprocket 11, the third chain 12, the second chain 13, the first chain 14, the first fast and slow drive motor 15, the workpiece 16, and the idler 17.
本实施例中，炉体7上设置有的入口炉门2和出口炉门3，入口炉门2和出口炉门3分 别位于炉体7的进料端和出料端，炉体7内设置有炉气循环装置：循环风扇213。炉体7内升温段203、强渗段204、扩散段205和降温段206设置有循环风扇213，炉气在每段区域内独自循环，互相干扰小。In this embodiment, the inlet furnace door 2 and the outlet furnace door 3 are provided on the furnace body 7, and the inlet furnace door 2 and the outlet furnace door are divided into 3 points. It is not located at the feeding end and the discharging end of the furnace body 7. The furnace body 7 is provided with a furnace gas circulation device: a circulation fan 213. The heating section 203, the strong infiltration section 204, the diffusion section 205 and the temperature decreasing section 206 in the furnace body 7 are provided with a circulation fan 213, and the furnace gas circulates independently in each section, and mutual interference is small.
炉体7内设置有带贯通孔211的隔墙214，隔墙214依次将炉体7内的空间分置成：升温段203、强渗段204、扩展段205、降温段206。从进料端到出料端设置有多层(本实施例共三层)穿过贯通孔211的托辊17，每层托辊17分别与各自的驱动装置连接。A partition wall 214 having a through hole 211 is disposed in the furnace body 7. The partition wall 214 sequentially divides the space in the furnace body 7 into a temperature rising section 203, a strong infiltration section 204, an expansion section 205, and a temperature decreasing section 206. A plurality of layers (three layers in this embodiment) are passed through the through rollers 17 of the through holes 211 from the feed end to the discharge end, and each of the rolls 17 is connected to a respective driving device.
炉体7的进料端依次设置有入口段201和预热段202。入口段201和预热段202的炉膛高度相同，升温段203、强渗段204、扩散段205和降温段206的炉膛高度相同，入口段201炉膛高度小于升温段203炉膛高度。入口段201和预热段202的炉膛高度远小于升温段203、强渗段204、扩散段205和降温段206的炉膛高度的，可以利用从升温段203出来的废炉气的余热对工件16进行烘干预热，并利用炉气的流动将水蒸汽带出炉外，同时最大程度削弱在开闭入口炉门时对炉内气流的影响，同时也实现了工件16在同一炉膛内的预热、升温、强渗、扩散、降温等渗碳或碳氮共渗工艺。The feed end of the furnace body 7 is provided with an inlet section 201 and a preheating section 202 in this order. The furnace section height of the inlet section 201 and the preheating section 202 is the same, and the furnace heights of the heating section 203, the strong infiltration section 204, the diffusion section 205 and the cooling section 206 are the same, and the inlet section 201 furnace height is smaller than the heating section 203 furnace height. The furnace height of the inlet section 201 and the preheating section 202 is much smaller than the furnace height of the heating section 203, the strong infiltration section 204, the diffusion section 205 and the cooling section 206, and the waste heat of the waste furnace gas from the heating section 203 can be utilized for the workpiece 16 Drying and preheating, and using the flow of the furnace gas to bring the water vapor out of the furnace, while minimizing the influence on the airflow in the furnace when opening and closing the inlet furnace door, and also preheating the workpiece 16 in the same furnace Carburizing or carbonitriding processes such as temperature rise, strong seepage, diffusion, and cooling.
驱动装置中的第一驱动装置装在炉体7外与入口段201前端相对应的位置，第一驱动装置中的第一快慢速驱动电机15与第一主动链轮5同轴连接，第一主动链轮5通过第一链条14与第一从动链轮6连接，第一从动链轮6置于炉体7外与预热段202的中部相对应的位置。第一主动链轮5和第一从动链轮6之间装有与第一链条14动配合的第一中间链轮，第一主动链轮5轴上、第一从动链轮6轴上和第一中间链轮轴上分别装有托辊17，托辊17用于承载工件16。The first driving device in the driving device is installed at a position outside the furnace body 7 corresponding to the front end of the inlet portion 201, and the first fast and slow driving motor 15 in the first driving device is coaxially connected with the first driving sprocket 5, A drive sprocket 5 is coupled to the first driven sprocket 6 via a first chain 14, and the first driven sprocket 6 is placed outside the furnace body 7 at a position corresponding to the middle of the preheating section 202. A first intermediate sprocket that is movably engaged with the first chain 14 is disposed between the first drive sprocket 5 and the first driven sprocket 6, and the first drive sprocket 5 is axially coupled to the first driven sprocket 6 A roller 17 is mounted on the first intermediate sprocket shaft, and the idler roller 17 is used to carry the workpiece 16.
驱动装置中的第二驱动装置装在炉体7外与升温段203前端相对应的位置，第二驱动装置中的慢速电机与第二主动链轮8同轴连接，第二主动链轮轴8上装有托辊，第二主动链轮8通过第二链条13与第二从动链轮9连接，第二从动链轮9轴上装有托辊，第二主动链轮8与第二从动链轮9两者之间装有与第二链条13动配合的第二中间链轮，第二中间链的轴上也装有托辊，第二从动链轮9置于炉体7外与降温段206中部相对应的位置。The second driving device in the driving device is installed at a position outside the furnace body 7 corresponding to the front end of the heating section 203, and the slow motor in the second driving device is coaxially connected with the second driving sprocket 8, and the second driving sprocket shaft 8 is connected. A roller is mounted thereon, the second drive sprocket 8 is coupled to the second driven sprocket 9 via the second chain 13, and the second driven sprocket 9 is provided with a roller on the shaft, the second drive sprocket 8 and the second driven sprocket A second intermediate sprocket is movably coupled between the sprocket 9 and the second chain 13. The second intermediate chain is also provided with a roller on the shaft, and the second driven sprocket 9 is placed outside the furnace body 7. The position corresponding to the middle of the cooling section 206.
驱动装置中的第三驱动装置装在炉体7外与降温段206后半部相对应的位置；第三驱动装置中的第二快慢速驱动电机与第三主动链轮10同轴连接，第二主动链轮10轴上装有托辊，第三主动链轮10通过第三链条12与第三从动链轮11连接，第三从动链轮11轴上装有托辊，第三主动链轮10与第三从动链轮11两者之间装有与第三链条12动配合的第三中间链轮，第三中间链轮上装有托辊，第三从动链轮11置于炉体7外与降温段206尾部相对应的位置。The third driving device in the driving device is installed at a position outside the furnace body 7 corresponding to the second half of the cooling section 206; the second fast slow driving motor in the third driving device is coaxially connected with the third driving sprocket 10, The second driving sprocket 10 is equipped with a roller on the shaft, the third driving sprocket 10 is connected to the third driven sprocket 11 through the third chain 12, and the third driven sprocket 11 is equipped with a roller on the shaft, and the third active chain A third intermediate sprocket is provided between the wheel 10 and the third driven sprocket 11 in a dynamic engagement with the third chain 12. The third intermediate sprocket is provided with a roller, and the third driven sprocket 11 is placed in the furnace. The position outside the body 7 corresponding to the tail of the cooling section 206.
炉体7内从进料端到出料端水平设置有3层贯通隔墙的托辊17，托辊17采用分层分段独立驱动，每层托辊17的入口段201和预热段202设置第一快慢速切换电机15，升温段203、强渗段204、扩散段205和降温段206前半部设置慢速电机，降温段206后半部设置第二快慢速切换电机，入口段201每层托辊17设置第一快慢速切换电机15，实现工件16快速转炉与慢速炉内移动，预热段202、升温段203、强渗段204、扩散段205和降温段206前半部每层辊棒设置慢速电机，实现工件16在炉内的不同热处理工艺；降温段206后半部每层托辊17设置第二快慢速切换电机，先将工件16慢速移动到快速托辊17上，然后快转出炉，减少转移时间，多层托辊17布置，分层分段独立驱动的设计，工件16在以单件、单排或多排的形式在托棍17上连续移动，工件16间无接触，不存在粘连现象，工作效率和热处理质量大大提高。The furnace body 7 is horizontally disposed with three layers of rollers 17 penetrating the partition wall from the feeding end to the discharge end, and the idler rollers 17 are independently driven by the layered segments, and the inlet section 201 and the preheating section 202 of each layer of the idler rollers 17 are respectively driven. The first fast and slow switching motor 15 is arranged, the heating unit 203, the strong infiltration section 204, the diffusion section 205 and the cooling section 206 are provided with a slow motor in the first half, and the second half of the cooling section 206 is provided with a second fast and slow switching motor, the inlet section. 201 each of the rollers 17 is provided with a first fast and slow switching motor 15 to realize the movement of the workpiece 16 in the fast converter and the slow furnace, the preheating section 202, the heating section 203, the strong infiltration section 204, the diffusion section 205 and the first half of the cooling section 206. Each layer of the roller is provided with a slow motor to realize different heat treatment processes of the workpiece 16 in the furnace; in the second half of the cooling section 206, each of the rollers 17 is provided with a second fast and slow switching motor, and the workpiece 16 is slowly moved to a fast speed. On the idler 17 and then quickly transferred out of the furnace to reduce the transfer time, the multi-layer idler 17 is arranged, and the layered and segmented independent drive design, the workpiece 16 is continuous on the peg 17 in a single piece, single row or multiple rows. Movement, no contact between workpieces 16, no adhesion, work efficiency and heat treatment quality Large increase.
入口段201和预热段202之间设置有能够上下移动的密封门212。当工件16装炉时，关 闭密封门212，当工件16进入入口段201装炉完毕后，关闭入口炉门2，打开密封门212，这样可以防止炉气在工件16装炉过程中大量外泄，造成资源浪费，影响工件16加热质量。A sealing door 212 that can move up and down is disposed between the inlet section 201 and the preheating section 202. When the workpiece 16 is installed, the off The sealing door 212 is closed. When the workpiece 16 enters the inlet section 201, the inlet furnace door 2 is closed, and the sealing door 212 is opened. This prevents the furnace gas from being leaked out during the loading process of the workpiece 16, causing waste of resources and affecting the workpiece. 16 heating quality.
出口炉门3通过传动装置303(采用链条)倾斜设置在炉体7的出料端，出口炉门3上设置有局部出口301和局部密封门302。局部密封门302上的开口滑动至需要进出炉的工件层位置，用于工件16的进出炉，有效阻止了炉气的外泄，同时避免外界空气进入炉内，节约了能源，提高了工件16加热效率。The outlet furnace door 3 is obliquely disposed at the discharge end of the furnace body 7 through a transmission 303 (using a chain), and the outlet furnace door 3 is provided with a partial outlet 301 and a partial sealing door 302. The opening on the partial sealing door 302 slides to the position of the workpiece layer that needs to enter and exit the furnace, and is used for the entry and exit of the workpiece 16, effectively preventing the leakage of the furnace gas, and avoiding the outside air from entering the furnace, saving energy and improving the workpiece 16 Heating efficiency.
出口炉门3通过传动装置在炉体7出料端的密封腔内滑动，密封腔呈倾斜状态设置在炉体7内，利用出口炉门3门体自重力压紧在密封腔的斜面上，使其四周达到密封状态。The outlet furnace door 3 is slid in the sealing cavity of the discharge end of the furnace body 7 through the transmission device, and the sealing chamber is disposed in the furnace body 7 in an inclined state, and the door body of the outlet furnace door is pressed against the inclined surface of the sealing chamber by gravity. Its circumference is sealed.
局部出口301的开口大小为炉口大小的1/4～1/3，在开启出口门时最大程度减少炉气的外泄，避免外界空气进入炉内。The opening size of the partial outlet 301 is 1/4 to 1/3 of the size of the furnace mouth, and the leakage of the furnace gas is minimized when the outlet door is opened, so that outside air is prevented from entering the furnace.
出口炉门3为完全密封式结构，与炉口配合处设置有密封圈，炉门上设置有气缸压紧装置，使炉口达到全部密封。The outlet furnace door 3 is a completely sealed structure, and a sealing ring is arranged at the joint of the furnace mouth, and a cylinder pressing device is arranged on the furnace door to complete the sealing of the furnace mouth.
出口炉门3所贴合的炉体7的外壁呈环状槽结构，环状槽结构上套装有冷却装置；减小炉口受温度影响出现的变形，并保持密封性。The outer wall of the furnace body 7 to which the outlet door 3 is attached has an annular groove structure, and the annular groove structure is provided with a cooling device; the deformation of the furnace mouth affected by the temperature is reduced, and the sealing property is maintained.
传动装置303为链条传动结构，通过链条拉动局部密封门302在密封腔内移动至所需出件位置。The transmission 303 is a chain transmission structure that is moved by the chain to move the partial sealing door 302 into the desired ejection position within the sealed chamber.
将局部出口301移动至需要取出工件16的托辊17层处，打开局部密封门302，可方便取出工件16，避免炉气与外界气体形成对流，出口炉门3用于不出炉时的密封。使在工件16出料时对降温段206炉气的影响降到最低，出口炉门3上下移动可对准任意一层托辊16，实现任意一层工件16的出料。The partial outlet 301 is moved to the layer of the idler 17 where the workpiece 16 needs to be taken out, and the partial sealing door 302 is opened, so that the workpiece 16 can be easily taken out to avoid convection of the furnace gas with the outside air, and the outlet furnace door 3 is used for sealing when the furnace is not discharged. The effect of the furnace gas on the cooling section 206 is minimized when the workpiece 16 is discharged, and the outlet furnace door 3 is moved up and down to be aligned with any one of the rollers 16 to realize the discharge of any one of the workpieces 16.
炉体7的进料端的一侧设置有装料台1，装料台1上设置有送料托辊106，装料台1下方装有水平移动装置和升降装置103，出料端的一侧设置有出料台4，出料台4与装料台结构相同：也同样设置有水平移动装置和升降装置。水平移动装置由安装在装料台1的支架上的水平驱动电机102、水平驱动主动链轮104和水平驱动从动链轮105以及气缸107等组成，水平驱动电机102的输出轴带动中心链轮旋转，中心链轮的旋转通过链条带动水平驱动主动链轮104和水平驱动从动链轮105进行旋转，从而带动送料托辊106转动，将工件16慢慢向炉体7的进料端靠近的同时，气缸107(或采用液压缸)将装料台1向前运送，使送料托辊106与炉体7内的托辊17对接。A loading station 1 is disposed on one side of the feeding end of the furnace body 7. The loading table 1 is provided with a feeding roller 106. The loading table 1 is provided with a horizontal moving device and a lifting device 103, and one side of the discharging end is provided. The discharge table 4 has the same structure as the loading table: a horizontal moving device and a lifting device are also provided. The horizontal moving device is composed of a horizontal driving motor 102 mounted on the bracket of the loading platform 1, a horizontal driving driving sprocket 104, a horizontal driving driven sprocket 105, a cylinder 107, and the like, and an output shaft of the horizontal driving motor 102 drives the center sprocket. Rotating, the rotation of the center sprocket drives the horizontal drive drive sprocket 104 and the horizontal drive driven sprocket 105 to rotate by the chain, thereby driving the feed roller 106 to rotate, and slowly moving the workpiece 16 toward the feed end of the furnace body 7. At the same time, the cylinder 107 (or a hydraulic cylinder) transports the loading table 1 forward, and the feeding idler 106 abuts the idler 17 in the furnace body 7.
升降装置103采用升降机带动装料台1进行升降，以方便工件16对准不同的托辊层，能够实现对不同层的工件16进行装炉操作。The lifting device 103 uses the elevator to drive the loading table 1 for lifting and lowering, so that the workpiece 16 can be aligned with different roller layers, and the workpiece 16 of different layers can be loaded.
热处理过程中，在入口段201和预热段202，来自于升温段203的废炉气与工件16移动方向相反，利用废弃的余热对工件16进行烘干预热，并利用炉气的流动将水蒸汽带出炉外，由于在这两个工作段的炉膛高度低且距离较长，因此外界的气流在装炉时不易对加热炉内部炉膛产生影响。During the heat treatment, in the inlet section 201 and the preheating section 202, the waste furnace gas from the temperature rising section 203 moves in the opposite direction to the workpiece 16, and the workpiece 16 is dried and preheated by the waste heat of waste, and the flow of the furnace gas is utilized. The water vapor is taken out of the furnace. Since the height of the furnace in these two working sections is low and the distance is long, the external airflow is not easy to affect the furnace inside the furnace when the furnace is installed.
在升温段203由于存在来自于强渗段的少量的富化气，仅需要在滴注口通入氮气，随着工件的缓慢移动，工件16被逐步加热至适合渗碳或碳氮共渗的温度。In the heating section 203, since there is a small amount of rich gas from the strong infiltration section, only nitrogen gas needs to be introduced into the drip port, and as the workpiece moves slowly, the workpiece 16 is gradually heated to be suitable for carburizing or carbonitriding. temperature.
工件16在强渗段204保持适合渗碳或碳氮共渗的温度，同时根据工艺要求通入保护气和富化气进行渗碳或碳氮共渗。The workpiece 16 maintains a temperature suitable for carburizing or carbonitriding in the strong infiltration section 204, and at the same time, a protective gas and an enriched gas are introduced for carburizing or carbonitriding according to the process requirements.
工件16在扩散段205继续保持适合渗碳或碳氮共渗的温度，同时降低富化气的通入量，使渗入工件的碳或碳、氮扩散，从而使渗层组织均匀。 The workpiece 16 continues to maintain a temperature suitable for carburization or carbonitriding in the diffusion section 205, while reducing the amount of enriched gas to be diffused, so that carbon or carbon and nitrogen permeating into the workpiece are diffused, thereby making the layered structure uniform.
工件16在降温段206根据工艺要求降温至适合淬火的温度，根据工艺要求通入保护气和富化气。The workpiece 16 is cooled in the temperature decreasing section 206 according to the process requirements to a temperature suitable for quenching, and the shielding gas and the rich gas are introduced according to the process requirements.
工件16在同一炉膛内的连续移动经过不同的工艺阶段，实现了渗碳或碳氮共渗工艺，由于工件16是单层在托辊1上滚动，因此投有工件与工件间、工件与料盘间的渗层死角，使渗层组织更加均匀。The continuous movement of the workpiece 16 in the same furnace passes through different process stages, and the carburizing or carbonitriding process is realized. Since the workpiece 16 is a single layer rolling on the idler 1, the workpiece and the workpiece, the workpiece and the material are cast. The dead angle of the layer between the discs makes the layered structure more uniform.
由于托辊17间不存在较厚的中门，隔墙214的贯通孔211处的托辊17与其它位置托辊17间距相同，托辊17间距小，80mm直径以上工件16(不装料盘)可直接通过。Since there is no thick middle door between the idle rollers 17, the idler 17 at the through hole 211 of the partition wall 214 has the same pitch as the other position idler 17, and the idler 17 has a small pitch, and the workpiece 16 of the diameter of 80 mm or more (without the loading tray) ) can be passed directly.
工作步骤如下：The work steps are as follows:
工件装炉：升降装置103将装料台1提升或下降至与待装层托辊17等高处，入口炉门2打开，水平移动装置将工件16移入炉内，使送料托辊106与炉内托辊对接；托辊17快转将工件16运送至入口段201，装料台1移出炉体，入口炉门2关闭，完成装炉。The workpiece loading furnace: the lifting device 103 lifts or lowers the loading table 1 to the same height as the to-be-loaded roller 17, the inlet furnace door 2 is opened, and the horizontal moving device moves the workpiece 16 into the furnace to make the feeding roller 106 and the furnace The inner roller is docked; the idler 17 is fast rotated to transport the workpiece 16 to the inlet section 201, the loading station 1 is removed from the furnace body, and the inlet furnace door 2 is closed to complete the furnace installation.
工件炉内工作：打开密封门212，入口段201托辊与炉内托辊以等速慢转，使工件16进入炉内，工件在炉内完成加热、渗碳或碳氮共渗以及降温等工艺。Working in the furnace: opening the sealing door 212, the inlet section 201 roller and the furnace idler rotate at a constant speed to make the workpiece 16 enter the furnace, and the workpiece is heated, carburized or carbonitrided and cooled in the furnace. Process.
工件出炉：当检测光栅检测到工件16已经到达降温段206后半部快速托辊17上时，出口炉门3移动，使局部出口301达到相应出料托辊层位置，局部密封门302打开。出料台4上的第二升降装置将出料托辊提升或下降至与待出料层托辊等高处，第二水平移动装置将出料托辊移入炉内，使其托辊与炉内托辊对接，托辊快转，将工件16传送至出料台的出料托辊上，出料台4的出料托辊移出加热炉后，局部密封门302马上关闭，保持炉内气氛。The workpiece is discharged: when the detecting grating detects that the workpiece 16 has reached the lower idle roller 17 of the cooling section 206, the outlet door 3 moves, so that the partial outlet 301 reaches the position of the corresponding discharging roller layer, and the partial sealing door 302 is opened. The second lifting device on the discharge table 4 raises or lowers the discharge roller to the same height as the idler to be discharged, and the second horizontal moving device moves the discharge roller into the furnace to make the roller and the furnace The inner roller is docked, the roller rotates fast, and the workpiece 16 is conveyed to the discharge roller of the discharge table. After the discharge roller of the discharge table 4 is removed from the heating furnace, the partial sealing door 302 is immediately closed to maintain the atmosphere inside the furnace. .
以上所述仅为本发明较佳可行的实施例而已，并非因此局限本发明的权利范围，凡运用本发明说明书及其附图内容所作的等效变化，均包含于本发明的权利范围之内。 The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. The equivalent changes made by the present specification and the contents of the drawings are included in the scope of the present invention. .

Claims (10)

  1. 一种用于渗碳或碳氮共渗的加热炉，包括炉体，设置在炉体上的入口炉门、出口炉门，入口炉门和出口炉门分别位于炉体的进料端和出料端，炉体内设置有炉气循环装置，其特征在于：炉体内设置有带贯通孔的隔墙，从进料端到出料端设置有多层穿过贯通孔的托辊，每层托辊分别与各自的驱动装置连接。A heating furnace for carburizing or carbonitriding, comprising a furnace body, an inlet furnace door and an outlet furnace door arranged on the furnace body, the inlet furnace door and the outlet furnace door are respectively located at the feeding end and the outlet of the furnace body At the material end, a furnace gas circulation device is arranged in the furnace body, wherein the furnace body is provided with a partition wall with a through hole, and a plurality of rollers passing through the through hole are arranged from the feeding end to the discharge end, and each layer is provided The rollers are each connected to a respective drive.
  2. 根据权利要求1所述的用于渗碳或碳氮共渗的加热炉，其特征在于：炉体的进料端依次设置有入口段和预热段，隔墙依次将炉体分为升温段、强渗段、扩散段和降温段。The heating furnace for carburizing or carbonitriding according to claim 1, wherein the feeding end of the furnace body is sequentially provided with an inlet section and a preheating section, and the partition wall sequentially divides the furnace body into a heating section. , strong infiltration section, diffusion section and cooling section.
  3. 根据权利要求2所述的用于渗碳或碳氮共渗的加热炉，其特征在于：入口段和预热段的炉膛高度相同，升温段、强渗段、扩散段和降温段的炉膛高度相同，入口段炉膛高度小于升温段炉膛高度。The heating furnace for carburizing or carbonitriding according to claim 2, wherein the inlet section and the preheating section have the same furnace height, and the furnace height of the heating section, the strong infiltration section, the diffusion section and the cooling section. Similarly, the furnace height at the inlet section is less than the furnace height in the heating section.
  4. 根据权利要求1所述的用于渗碳或碳氮共渗的加热炉，其特征在于：驱动装置中的第一驱动装置装在炉体外与入口段前端相对应的位置，驱动装置中的第二驱动装置装在炉体外与升温段前端相对应的位置，驱动装置中的第三驱动装置装在炉体外与降温段后半部相对应的位置。The heating furnace for carburizing or carbonitriding according to claim 1, wherein the first driving device in the driving device is installed at a position outside the furnace body corresponding to the front end of the inlet portion, and the first in the driving device The second driving device is installed at a position corresponding to the front end of the heating section before the furnace body, and the third driving device in the driving device is installed at a position corresponding to the second half of the cooling section outside the furnace.
  5. 根据权利要求2所述的用于渗碳或碳氮共渗的加热炉，其特征在于：入口段和预热段之间设置有能够上下移动的密封门。A heating furnace for carburizing or carbonitriding according to claim 2, wherein a sealing door movable up and down is provided between the inlet section and the preheating section.
  6. 根据权利要求1所述的用于渗碳或碳氮共渗的加热炉，其特征在于：炉体内的托辊层数为2～10层。A heating furnace for carburizing or carbonitriding according to claim 1, wherein the number of idler layers in the furnace body is 2 to 10 layers.
  7. 根据权利要求1所述的用于渗碳或碳氮共渗的加热炉，其特征在于：出口炉门通过传动装置倾斜设置在炉体的出料端，出口炉门上设置有局部出口和局部密封门。The heating furnace for carburizing or carbonitriding according to claim 1, wherein the outlet furnace door is disposed obliquely at the discharge end of the furnace body through a transmission device, and the outlet door is provided with a partial outlet and a part. Seal the door.
  8. 根据权利要求1所述的用于渗碳或碳氮共渗的加热炉，其特征在于：炉体的进料端的一侧设置有装料台，装料台上设置有送料托辊，装料台下方装有水平移动装置和升降装置，出料端的一侧设置有出料台，出料台与装料台结构相同。The heating furnace for carburizing or carbonitriding according to claim 1, wherein a charging station is arranged on one side of the feeding end of the furnace body, and a feeding roller is arranged on the loading table, and the charging device is provided. A horizontal moving device and a lifting device are arranged under the table, and a discharging table is arranged on one side of the discharging end, and the discharging table has the same structure as the loading table.
  9. 根据权利要求4所述的用于渗碳或碳氮共渗的加热炉，其特征在于：第一驱动装置中的第一快慢速驱动电机与第一主动链轮同轴连接，第一主动链轮通过第一链条与第一从动链轮连接，第一从动链轮置于炉体外与预热段的中部相对应的位置；第二驱动装置中的慢速电机与第二主动链轮同轴连接，第二主动链轮通过第二链条与第二从动链轮连接，第二从动链轮置于炉体外与降温段中部相对应的位置；第三驱动装置中的第二快慢速驱动电机与第三主动链轮同轴连接，第三主动链轮通过第三链条与第三从动链轮连接，第三从动链轮置于炉体外与降温段尾部相对应的位置。The heating furnace for carburizing or carbonitriding according to claim 4, wherein the first fast and slow driving motor in the first driving device is coaxially connected with the first driving sprocket, the first active The sprocket is connected to the first driven sprocket through the first chain, the first driven sprocket is placed at a position corresponding to the middle of the preheating section outside the furnace; the slow motor and the second active chain in the second driving device The wheel is coaxially connected, the second driving sprocket is connected to the second driven sprocket through the second chain, and the second driven sprocket is placed at a position corresponding to the middle of the cooling section outside the furnace; the second in the third driving device The fast and slow drive motor is coaxially connected with the third drive sprocket, the third drive sprocket is connected to the third driven sprocket through the third chain, and the third driven sprocket is placed outside the furnace corresponding to the tail of the cooling section. position.
  10. 根据权利要求9所述的用于渗碳或碳氮共渗的加热炉，其特征在于：第一驱动电机、第二驱动电机和第三驱动电机设置的个数分别与托辊的层数相适应。 The heating furnace for carburizing or carbonitriding according to claim 9, wherein the number of the first driving motor, the second driving motor and the third driving motor is respectively set to be the number of layers of the roller adapt.
PCT/CN2016/000064 2015-09-01 2016-01-29 Heating furnace for carburizing or carbonitriding WO2017036053A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201520676423.5 2015-09-01
CN201520676423.5U CN204849000U (en) 2015-09-01 2015-09-01 A heating furnace for carburization or carbonitriding

Publications (1)

Publication Number Publication Date
WO2017036053A1 true WO2017036053A1 (en) 2017-03-09

Family

ID=54739568

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/000064 WO2017036053A1 (en) 2015-09-01 2016-01-29 Heating furnace for carburizing or carbonitriding

Country Status (2)

Country Link
CN (1) CN204849000U (en)
WO (1) WO2017036053A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108277476A (en) * 2018-03-14 2018-07-13 深圳市志橙半导体材料有限公司 A kind of depositing SiC processing equipment using thermal cvd
CN111378920A (en) * 2020-04-21 2020-07-07 河南德佰特机电设备制造有限公司 Zinc impregnation device and zinc impregnation method
CN114716264A (en) * 2022-05-18 2022-07-08 河南万贯实业有限公司 Full-automatic dipping system is used in graphite processing

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105063548B (en) * 2015-09-01 2018-04-10 亚捷科技（唐山）股份有限公司 Heating furnace for carburizing or carbonitriding
CN204849000U (en) * 2015-09-01 2015-12-09 唐山亚捷机械有限公司 A heating furnace for carburization or carbonitriding
CN105737598A (en) * 2016-03-07 2016-07-06 苏州新凌电炉有限公司 High-efficiency roller bed kiln
CN106140995A (en) * 2016-07-14 2016-11-23 镇江裕久智能装备股份有限公司 A kind of dual pathways blank wheel hub heating furnace
CN109735792B (en) * 2018-12-28 2020-12-08 嘉兴华竹电子有限公司 Carburizing and carbonitriding heating furnace
CN110657667B (en) * 2019-09-11 2021-04-06 山西太钢工程技术有限公司 Continuous heating furnace, hanging wall for continuous heating furnace and manufacturing method of hanging wall
CN115305333A (en) * 2022-08-05 2022-11-08 江苏江顺精密机电设备有限公司 Continuous aging furnace
CN117512500B (en) * 2024-01-08 2024-03-26 江苏丰东热技术有限公司 Carbonitriding heating device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168788A2 (en) * 1984-07-17 1986-01-22 Chugai Ro Co., Ltd. Continuous type atmosphere heat treating furnace
JPH11189858A (en) * 1997-12-25 1999-07-13 Dowa Mining Co Ltd Gas carburizing method and device therefor
JP2003042664A (en) * 2001-07-31 2003-02-13 Daido Steel Co Ltd Vacuum heating furnace
JP2005120439A (en) * 2003-10-17 2005-05-12 Nachi Fujikoshi Corp Vacuum carburizing furnace
EP1612291A1 (en) * 2004-06-25 2006-01-04 Fuji Jukogyo Kabushiki Kaisha Multistage continuous carburizing and quenching furnace and continuous carburizing and quenching method
CN105063548A (en) * 2015-09-01 2015-11-18 唐山亚捷机械有限公司 Heating furnace for carburizing or carbonitriding
CN204849000U (en) * 2015-09-01 2015-12-09 唐山亚捷机械有限公司 A heating furnace for carburization or carbonitriding

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168788A2 (en) * 1984-07-17 1986-01-22 Chugai Ro Co., Ltd. Continuous type atmosphere heat treating furnace
JPH11189858A (en) * 1997-12-25 1999-07-13 Dowa Mining Co Ltd Gas carburizing method and device therefor
JP2003042664A (en) * 2001-07-31 2003-02-13 Daido Steel Co Ltd Vacuum heating furnace
JP2005120439A (en) * 2003-10-17 2005-05-12 Nachi Fujikoshi Corp Vacuum carburizing furnace
EP1612291A1 (en) * 2004-06-25 2006-01-04 Fuji Jukogyo Kabushiki Kaisha Multistage continuous carburizing and quenching furnace and continuous carburizing and quenching method
CN105063548A (en) * 2015-09-01 2015-11-18 唐山亚捷机械有限公司 Heating furnace for carburizing or carbonitriding
CN204849000U (en) * 2015-09-01 2015-12-09 唐山亚捷机械有限公司 A heating furnace for carburization or carbonitriding

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108277476A (en) * 2018-03-14 2018-07-13 深圳市志橙半导体材料有限公司 A kind of depositing SiC processing equipment using thermal cvd
CN108277476B (en) * 2018-03-14 2024-01-16 深圳市志橙半导体材料有限公司 Silicon carbide deposition treatment equipment utilizing thermal CVD method
CN111378920A (en) * 2020-04-21 2020-07-07 河南德佰特机电设备制造有限公司 Zinc impregnation device and zinc impregnation method
CN114716264A (en) * 2022-05-18 2022-07-08 河南万贯实业有限公司 Full-automatic dipping system is used in graphite processing

Also Published As

Publication number Publication date
CN204849000U (en) 2015-12-09

Similar Documents

Publication Publication Date Title
WO2017036053A1 (en) Heating furnace for carburizing or carbonitriding
FI88809B (en) Furnace apparatus for heat treatment of objects
US4627814A (en) Continuous type atmosphere heat treating furnace
CN107588662B (en) Vacuum degreasing sintering furnace
US7377774B2 (en) Change-over apparatus for cooling gas passages in vacuum heat treating furnace
CN105063548B (en) Heating furnace for carburizing or carbonitriding
JPS6141759A (en) Rotary furnace floor having ring shaped structure for heat treatment of works
CN211112112U (en) Sectional type continuous heat treatment furnace
US4626203A (en) Furnace
US4628615A (en) Process and installation for the heat treatment of cylindrical bodies, especially pipes
CN111254263A (en) Heat treatment device and process for advancing clutch hub
CN206109546U (en) Push away set pressure device of quenching
CN108298269A (en) A kind of grain transporter with drying and refrigerating function
JPH03257119A (en) Roller hearth type vacuum furnace
CN102116572A (en) Baking furnace for refractory bricks
KR200318436Y1 (en) Roller Hearth kiln for forming paste film in PDP
CN106435602A (en) Tray push type press quenching device
CN111962011A (en) Carburizing furnace for metal forging heat treatment and operation method thereof
JP2020085286A (en) Baking furnace
US5997290A (en) Revolving transfer furnace for treating workpieces
CN112524942B (en) Continuous sealing high-temperature mesh belt furnace
CN204824985U (en) High temperature gyration elevating system
CN116026126B (en) Drying device of bearing ring
CN111947455B (en) Polymorphic tunnel kiln processing method for kiln brick molding
JP2003183724A (en) Heat treatment furnace

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16840493

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16840493

Country of ref document: EP

Kind code of ref document: A1