Four-push-disc carburizing and intercooling production line

Abstract

The utility model relates to the field of carburizing production lines, in particular to a four-push-disc carburizing and intercooling production line which is characterized in that a pre-oxidation area is arranged at an outlet of the feeding end of an upper discharging table, an outlet of the pre-oxidation area is connected with a strong carburizing area, four electric push rods are fixedly arranged on one side of the strong carburizing area, and a diffusion area is arranged in the strong carburizing area in a communicated mode; an intercooling area is connected behind the diffusion area, a heat preservation area is arranged behind the intercooling area, an outlet of the heat preservation area is communicated with a quenching area, a cleaning machine is arranged behind the catalysis area, a tempering area is arranged behind the cleaning machine, and an outlet of the tempering area is connected to the upper discharging table through a roller table. According to the utility model, the four electric push rods are adopted in the device, so that not only can the mass production and flexible production of workpieces be realized, but also the steps of pre-oxidation, strong permeation, diffusion, intercooling, heat preservation, quenching, cleaning and tempering are sequentially performed in the process, the process range is widened, and the flexibility is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of carburizing production lines, especially a production line for four-pusher carburizing and medium cooling. Background Art

[0002] The production line for pusher carburizing and medium cooling is an advanced production line specially used for heat treatment of metal parts. It combines the continuous operation characteristics of the pusher furnace and the carburizing and medium cooling processes to meet the heat treatment requirements of large quantities and high quality.

[0003] At present, although the two-pusher production lines on the market can achieve mass production of workpieces, they can only achieve strong carburizing, diffusion, and heat preservation in terms of process. This process has poor flexibility. For materials with certain specific performance requirements, only through strong carburizing, diffusion, and heat preservation may not be able to meet all needs, restricting the application range of the process. Therefore, there is an urgent need for a production line for pusher carburizing and medium cooling with flexible production. Summary of the Utility Model

[0004] The purpose of the utility model is to propose a production line for four-pusher carburizing and medium cooling to solve the disadvantages existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A production line for four-pusher carburizing and medium cooling, including a loading and unloading table. A pre-oxidation area is arranged at the outlet of the loading end of the loading and unloading table. The outlet of the pre-oxidation area is connected to a strong carburizing area. Four electric push rods are fixedly arranged on one side of the strong carburizing area, and a diffusion area is communicated inside the strong carburizing area; the rear of the diffusion area is connected to a medium cooling area, the rear of the medium cooling area is provided with a heat preservation area, the outlet of the heat preservation area is communicated with a quenching area, the rear of the quenching area is provided with a cleaning machine, the rear of the cleaning machine is provided with a tempering area, and the outlet of the tempering area is connected to the loading and unloading table through a roller table.

[0007] In addition, preferably, a plurality of radiant tubes are arranged inside the diffusion area, and a plurality of air cooling tubes are arranged inside the medium cooling area.

[0008] In addition, preferably, an operation table is arranged on one side of the loading and unloading table, and the operation table faces the strong carburizing area.

[0009] In addition, preferably, the strong carburizing area is located inside the furnace shell, and a furnace lining is arranged at the rear of the inner wall of the furnace shell.

[0010] In addition, preferably, a push-pull chain is arranged below the electric push rods on one side of the strong carburizing area. A lifting platform is arranged at the outlet of the push-pull chain, and the lifting platform is adapted to the electric push rods.

[0011] In addition, a preferred structure is that an electric rear limit is provided on the furnace shell, and the electric rear limit is adapted to the electric push rod.

[0012] In addition, a preferred structure is that a middle door is provided inside the furnace shell, and the middle door is located behind the lifting table.

[0013] In addition, a preferred structure is that a plurality of radiant tubes are vertically arranged in the furnace shell, and a circulation fan is provided at the top of the furnace shell.

[0014] The beneficial effects of the present utility model are as follows: Four electric push rods are adopted in this device, which can not only realize mass production and flexible production of workpieces, but also successively pass through pre-oxidation, strong carburization, diffusion, intermediate cooling, heat preservation, quenching, cleaning, and tempering steps in terms of process, improving the process range and having high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a four-push-plate carburizing and intermediate cooling production line proposed by the present utility model;

[0016] Figure 2 is a schematic structural diagram of the furnace shell and the electric push rod of the four-push-plate carburizing and intermediate cooling production line proposed by the present utility model.

[0017] In the figure: 1 upper and lower loading table, 2 pre-oxidation zone, 3 strong carburization zone, 4 diffusion zone, 41 radiant tube, 5 intermediate cooling zone, 51 air cooling tube, 6 heat preservation zone, 7 quenching zone, 8 cleaning machine, 9 tempering zone, 10 roller table, 11 operation table, 12 electric push rod, 13 push and pull chain, 14 lifting table, 15 middle door, 16 circulation fan, 17 furnace shell, 18 furnace lining, 19 electric rear limit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0019] Referring to Figure 1-2 , a four-push-plate carburizing and intermediate cooling production line includes an upper and lower loading table 1. A pre-oxidation zone 2 is provided at the outlet of the loading end of the upper and lower loading table 1. The outlet of the pre-oxidation zone 2 is connected to a strong carburization zone 3. Four electric push rods 12 are fixedly provided on one side of the strong carburization zone 3, and a diffusion zone 4 is communicated inside the strong carburization zone 3. The rear of the diffusion zone 4 is connected to an intermediate cooling zone 5. The rear of the intermediate cooling zone 5 is provided with a heat preservation zone 6. The outlet of the heat preservation zone 6 is communicated with a quenching zone 7. The rear of the quenching zone 7 is provided with a cleaning machine 8. The rear of the cleaning machine 8 is provided with a tempering zone 9, and the outlet of the tempering zone 9 is connected to the upper and lower loading table 1 through a roller table 10.

[0020] Among them, the workpiece first enters from the loading and unloading table 1 in the process of this production line, and then the workpiece successively passes through pre-oxidation, strong carburizing, diffusion, intermediate cooling, heat preservation, quenching, cleaning, and tempering, and is then re-transported to the loading and unloading table 1 via the roller table 10, so as to realize the processing of the workpiece.

[0021] Among them, multiple radiant tubes 41 are arranged in the diffusion zone 4, and multiple air-cooling tubes 51 are arranged in the intermediate cooling zone 5. The radiant tubes 41 are made of high-quality heat-resistant steel, and the inside of the tubes is nickel-chromium high-resistance electric heating alloy wire. The workpiece can be heated through the radiant tubes 41. The air-cooling tubes 41 are cooled by suction of a negative-pressure air duct, and the workpiece in the intermediate cooling zone 5 can be cooled through the air duct tubes 51.

[0022] Among them, an operating platform 11 is arranged on one side of the loading and unloading table 1, and the operating platform 11 faces the strong carburizing zone 3. Through the setting of the operating platform 11, it is convenient for the staff to operate this production line.

[0023] Among them, the strong carburizing zone 3 is located inside the furnace shell 17, and a furnace lining 18 is arranged behind the inner wall of the furnace shell 17. The furnace shell 17 is a welded assembly of steel plates and steel sections, and all the steel plates in the inner cavity of the shell are sealed welded and inspected by kerosene leakage. The furnace lining 18 is composed of anti-carburizing bricks and high-quality heat-insulating materials. Through the setting of the furnace shell 17 and the furnace lining 18, the stability of the strong carburizing zone 4 during operation can be ensured.

[0024] Among them, a push-pull chain 13 is arranged below the electric push rod 12 on one side of the strong carburizing zone 3, a lifting platform 14 is arranged at the outlet of the push-pull chain 13, and the lifting platform 14 is adapted to the electric push rod 12. The push-pull chain 13 is used for the transportation and transfer of the workpiece between these devices. The lifting platform 14 is used for the transfer of the workpiece.

[0025] Among them, an electric rear limit 19 is arranged on the furnace shell 17, and the electric rear limit 19 is adapted to the electric push rod 12. The electric rear limit 19 is composed of a heat-resistant steel limit rod, a motor, a transmission device, a travel switch, etc. It is used to position the pushing position of the electric push rod 12 to prevent the material tray from colliding with the middle door 15 after deviating from the normal position during lateral transfer. And it should be noted that the specific structure and working mode of the electric rear limit 19 are both prior arts, so they will not be elaborated in this utility model.

[0026] Among them, a middle door 15 is arranged inside the furnace shell 17, and the middle door 15 is located behind the lifting platform 14. The middle door 15 is mainly composed of a heat-insulating furnace door, a lifting mechanism, a transmission mechanism, a sealed box body, etc. It can separate one physical area from another as much as possible so that the atmosphere and heat of the two areas do not interfere with each other.

[0027] Among them, a plurality of radiant tubes 41 are vertically arranged inside the furnace shell 17, and a circulating fan 16 is arranged at the top of the furnace shell 17. A forced circulation variable-frequency blower made of heat-resistant alloy is installed at the top of the circulating fan 16, and oil cooling is used for cooling the bearing position of the circulating blower. It can ensure the uniformity of the furnace atmosphere.

[0028] In the present utility model, a pre-oxidation zone 2 is arranged at the outlet of the loading end of the loading and unloading table 1. The outlet of the pre-oxidation zone 2 is connected to a strong carburizing zone 3. Four electric push rods 12 are fixedly arranged on one side of the strong carburizing zone 3. And a diffusion zone 4 is communicated inside the strong carburizing zone 3. The rear of the diffusion zone 4 is connected to an intermediate cooling zone 5. The rear of the intermediate cooling zone 5 is provided with a heat preservation zone 6. The outlet of the heat preservation zone 6 is communicated with a quenching zone 7. The rear of the quenching zone 7 is provided with a cleaning machine 8. The rear of the cleaning machine 8 is provided with a tempering zone 9. And the outlet of the tempering zone 9 is connected to the loading and unloading table 1 through a roller table 10. The loading and unloading table 1 is used for conveying the workpiece and the tray, including loading and unloading.

[0029] Further, the workpiece on the loading and unloading table 1 is pushed into the pre-oxidation furnace 2 by a pusher head to complete the pre-oxidation work of the workpiece. After the pre-oxidation is completed, the workpiece enters the strong carburizing zone 3, the diffusion zone 4, and the intermediate cooling zone 5. After the carburizing is completed, the workpiece enters the heat preservation zone 6 to ensure the quenching temperature. Then the workpiece is quenched. After the quenching is completed, it enters the cleaning machine 8 for degreasing cleaning of the workpiece. After the cleaning is completed, tempering is carried out. After the tempering is completed, the workpiece is conveyed to the loading and unloading table 1 by the roller table 10.

[0030] In the present utility model, four electric push rods 12 are adopted in the device, which can not only realize the mass production and flexible production of workpieces, but also sequentially go through the steps of pre-oxidation, strong carburizing, diffusion, intermediate cooling, heat preservation, quenching, cleaning, and tempering in terms of process, improving the process scope and having high flexibility.

[0031] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. Four-pusher carburizing and intercritical cooling production line, including loading and unloading table (1), characterized in that, The outlet of the loading end of the upper loading table (1) is provided with a pre-oxidation zone (2), the outlet of the pre-oxidation zone (2) is connected to a strong carburizing zone (3), four electric push rods (12) are fixedly arranged on one side of the strong carburizing zone (3), and a diffusion zone (4) is communicated in the strong carburizing zone (3); The rear of the diffusion zone (4) is connected to an intermediate cooling zone (5), the rear of the intermediate cooling zone (5) is provided with a heat preservation zone (6), the outlet of the heat preservation zone (6) is communicated with a quenching zone (7), the rear of the quenching zone (7) is provided with a cleaning machine (8), the rear of the cleaning machine (8) is provided with a tempering zone (9), and the outlet of the tempering zone (9) is connected to the upper loading table (1) through a roller table (10).

2. The four-push-plate carburizing and intercritical cooling production line according to claim 1, wherein A plurality of radiant tubes (41) are arranged in the diffusion zone (4), and a plurality of air-cooled tubes (51) are arranged in the intermediate cooling zone (5).

3. The four-push-plate carburizing and intercooling production line according to claim 1, characterized in that An operating platform (11) is arranged on one side of the upper loading table (1), and the operating platform (11) faces the strong carburizing zone (3).

4. The production line for four-push-plate carburizing and intermediate cooling according to claim 1, characterized in that, The strong carburizing zone (3) is located inside the furnace shell (17), and a furnace lining (18) is arranged at the rear of the inner wall of the furnace shell (17).

5. The four-push-plate carburizing and intercritical cooling production line according to claim 4, characterized in that, A push-pull chain (13) is arranged below the electric push rod (12) on one side of the strong carburizing zone (3), a lifting platform (14) is arranged at the outlet of the push-pull chain (13), and the lifting platform (14) is adapted to the electric push rod (12).

6. The four-push-plate carburizing and intercooling production line according to claim 5, characterized in that, An electric rear limit (19) is arranged on the furnace shell (17), and the electric rear limit (19) is adapted to the electric push rod (12).

7. The four-push-plate carburizing and intermediate cooling production line according to claim 6, characterized in that A middle door (15) is arranged inside the furnace shell (17), and the middle door (15) is located behind the lifting platform (14).

8. The four-push-plate carburizing and intermediate cooling production line according to claim 7, characterized in that, A plurality of radiant tubes (41) are vertically arranged inside the furnace shell (17), and a circulation fan (16) is arranged at the top of the furnace shell (17).

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