Single-chamber multi-temperature-zone vacuum annealing furnace and annealing method

Abstract

The application discloses a single-chamber multi-temperature-zone vacuum annealing furnace and an annealing method, which comprise a furnace body (1) and a rack (2), the furnace body (1) is fixedly installed on the rack (2), the furnace body (1) comprises a plurality of annealing cavities which are separated by isolation valves (3), and the furnace body (1) is connected with a vacuumizing device. The furnace body is separated into a plurality of independent annealing cavities by the isolation valves, independent electric heating wires are installed in each annealing cavity, the heating temperature of the electric heating wire is controlled according to the temperature in the cavity measured by a temperature control thermocouple, each annealing cavity reaches different annealing temperatures to meet the annealing temperature requirements of different annealing elements, and the production efficiency is improved and the finished product quality is stable.

Description

Technical Field

[0001] This invention relates to the field of annealing equipment technology, specifically to a single-chamber multi-temperature zone vacuum annealing furnace and annealing method. Background Technology

[0002] Annealing is a metal heat treatment process that involves heating metallic materials or workpieces to a specific temperature according to process requirements, holding them at that temperature for a period of time, and then cooling them at an appropriate rate. This process alters the metal's microstructure and properties (changing grain structure, refining the microstructure, relieving stress, and softening the material). The purpose is to soften metal materials or workpieces that have undergone casting, forging, welding, or machining, improve their plasticity and toughness, homogenize their chemical composition, remove internal residual stress, fully utilize the potential of the metal material, meet user requirements, and extend the service life of the metal material. However, most existing vacuum annealing furnaces are single-chamber temperature control systems, typically heating only the entire material to a specific temperature at a time. They anneal only a single element at a time, failing to meet the temperature requirements of different annealing elements, resulting in low adaptability and low production efficiency. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art and proposes a single-chamber multi-temperature zone vacuum annealing furnace and annealing method.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A single-chamber multi-temperature zone vacuum annealing furnace includes a furnace body and a frame. The furnace body is fixedly mounted on the frame. The furnace body includes multiple annealing chambers separated by isolation valves. The furnace body is also connected to a vacuum pumping device.

[0006] Furthermore, the vacuum pumping device includes a molecular pump and a fore-vacuum pump, which are mounted on a frame.

[0007] Furthermore, one end of the molecular pump is connected to the furnace body, and the other end is connected to the forestage vacuum pump. A high-vacuum valve is installed on the connecting pipeline between the molecular pump and the furnace body, and one high-vacuum valve is installed for each annealing chamber.

[0008] Furthermore, multiple temperature measuring thermocouples are evenly distributed on the side of the furnace body, and sealed feed doors and sealed discharge doors are respectively provided at both ends of the furnace body.

[0009] Furthermore, the furnace body is a cylindrical structure with an annealing chamber inside. Electric heating wires are evenly arranged on the inner wall of each annealing chamber inside the furnace body, and a temperature control thermocouple is also provided on the outer side of the furnace body.

[0010] Furthermore, each of the annealing chambers has an independently installed electric heating wire, and the electric heating wire and the temperature control thermocouple are connected to the control system.

[0011] Furthermore, the bottom of the furnace body is connected to a high-temperature rapid cooling device, which is a blower and is detachably connected to the furnace body.

[0012] Furthermore, the isolation valve is a water-cooled isolation valve, which is rotatably installed inside the furnace body. A drive motor is installed on the upper part of the furnace body, and the drive motor is connected to the isolation valve.

[0013] An annealing method for a single-chamber multi-temperature zone vacuum annealing furnace includes the following steps:

[0014] S1. Open the sealed feed door on the furnace body, and place the annealing elements into different annealing chambers according to their temperature requirements. Use the drive motor to rotate the isolation valve to close the isolation valve and turn on the vacuum device to create a vacuum environment inside the furnace.

[0015] S2, the control system turns on the electric heating wire and adjusts the temperature of the electric heating wire in each annealing chamber according to the temperature data returned by the temperature control thermocouple, so that each annealing chamber reaches the preset temperature.

[0016] S3. After annealing, open the isolation valve, turn on the rapid cooling device to cool the entire furnace body, and open the sealed discharge door to remove the annealed components.

[0017] Based on the above technical solution, the following technical effects can be achieved:

[0018] This invention provides a single-chamber multi-temperature zone vacuum annealing furnace and annealing method. The furnace body is divided into multiple independent annealing chambers by isolation valves. Each annealing chamber is equipped with an independent electric heating wire. The control system controls the heating temperature of the electric heating wire according to the temperature inside the chamber measured by the temperature control thermocouple, so that each annealing chamber reaches a different annealing temperature to meet the annealing temperature requirements of different annealing elements, thereby improving production efficiency and stabilizing the quality of finished products. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the vacuum annealing furnace structure of the present invention;

[0020] Figure 2 This is a side view of the vacuum annealing furnace of the present invention;

[0021] Figure 3 yes Figure 2 Schematic diagram of the AA section.

[0022] In the diagram: 1-furnace body, 2-frame, 3-isolation valve, 4-molecular pump, 5-forevacuum pump, 6-high vacuum valve, 7-temperature measuring thermocouple, 8-electric heating wire, 9-temperature control thermocouple, 10-high temperature rapid cooling device, 11-drive motor. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figures 1-3 The present invention discloses a single-chamber multi-temperature zone vacuum annealing furnace, comprising a furnace body 1 and a frame 2. The furnace body 1 is fixedly mounted on the frame 2. The furnace body 1 includes multiple annealing chambers separated by isolation valves 3. The furnace body 1 is also connected to a vacuum pumping device. In this embodiment, there are 3 annealing chambers.

[0028] According to one embodiment of the present invention, the vacuum pumping device includes a molecular pump 4 and a forestage vacuum pump 5, which are mounted on a frame 2.

[0029] According to one embodiment of the present invention, one end of the molecular pump 4 is connected to the furnace body 1 and the other end is connected to the pre-vacuum pump 5. A high vacuum valve 6 is provided on the connecting pipeline between the molecular pump 4 and the furnace body 1. A high vacuum valve 6 is provided for each annealing chamber. Since the inner cavity of the furnace body 1 is large, in this embodiment, a high vacuum valve 6 is provided at the corresponding position of each annealing chamber to ensure the vacuum environment inside the furnace body 1.

[0030] According to one embodiment of the present invention, multiple temperature measuring thermocouples 7 are evenly distributed on the side of the furnace body 1, and sealed feed gates and sealed discharge gates are respectively provided at both ends of the furnace body 1. The temperature measuring thermocouples 7 measure the temperature in the corresponding annealing chamber in real time, and the operator can monitor the temperature in the furnace in real time.

[0031] According to one embodiment of the present invention, the furnace body 1 is a columnar structure with an annealing chamber inside. Electric heating wires 8 are uniformly arranged on the inner wall of each annealing chamber inside the furnace body 1. Temperature control thermocouples 9 are also provided on the outer side of the furnace body 1. The temperature is measured by the temperature control thermocouples 9 and transmitted to the control system. The control system then determines the heating temperature of the electric heating wires 8 so that each annealing chamber reaches the preset temperature.

[0032] According to one embodiment of the present invention, each of the annealing chambers is independently provided with an electric heating wire 8, and the electric heating wire 8 and the temperature control thermocouple 9 are connected to the control system.

[0033] According to one embodiment of the present invention, the bottom of the furnace body 1 is connected to a high-temperature rapid cooling device 10, which is a blower and is detachably connected to the furnace body 1.

[0034] According to one embodiment of the present invention, the isolation valve 3 is a water-cooled isolation valve, which is rotatably disposed inside the furnace body 1. A drive motor 11 is installed on the upper part of the furnace body 1, and the drive motor 11 is connected to the isolation valve 3.

[0035] An annealing method for a single-chamber multi-temperature zone vacuum annealing furnace includes the following steps:

[0036] S1, open the sealed feed door on the furnace body 1, and put the annealing elements into different annealing chambers according to the temperature requirements of each annealing element. Drive the motor 11 to rotate the isolation valve 3 to close the isolation valve, and turn on the vacuum device to create a vacuum environment inside the furnace body 1.

[0037] S2, the control system turns on the electric heating wire 8 to heat, and adjusts the temperature of the electric heating wire 8 in each annealing chamber according to the temperature data transmitted back by the temperature control thermocouple 9, so that each annealing chamber reaches the preset temperature;

[0038] S3. After annealing, open isolation valve 3, turn on rapid cooling device to cool the entire furnace body 1, and open sealed discharge door to remove annealed components.

[0039] This invention can form multiple different temperature zones within the cavity each time, with electric temperature isolation valves separating the temperature zones. This allows for the one-time annealing of annealing elements with different temperature requirements, resulting in high efficiency and stable product quality.

[0040] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A single-chamber multi-temperature zone vacuum annealing furnace, comprising a furnace body (1) and a frame (2), characterized in that, The furnace body (1) is fixedly installed on the frame (2). The furnace body (1) includes multiple annealing chambers separated by isolation valves (3). The furnace body (1) is also connected to a vacuum pumping device. The vacuum pumping device includes a molecular pump (4) and a pre-vacuum pump (5). The molecular pump (4) and the pre-vacuum pump (5) are installed on the frame (2). One end of the molecular pump (4) is connected to the furnace body (1), and the other end is connected to the pre-vacuum pump (5). A high vacuum valve (6) is provided on the connecting pipeline between the molecular pump (4) and the furnace body (1). Each annealing chamber is provided with a corresponding high vacuum valve (6). Multiple temperature measuring thermocouples (7) are evenly distributed on the side of the furnace body (1), and sealed feed gate and sealed discharge gate are respectively provided at both ends of the furnace body (1); The isolation valve (3) is a water-cooled isolation valve. The isolation valve (3) is rotatably installed inside the furnace body (1). A drive motor (11) is installed on the upper part of the furnace body (1). The drive motor (11) is connected to the isolation valve (3). The bottom of the furnace body (1) is connected to a high-temperature rapid cooling device (10), which is a blower and is detachably connected to the furnace body (1). The furnace body (1) is a columnar structure with an annealing chamber inside. Electric heating wires (8) are evenly arranged on the inner wall of each annealing chamber inside the furnace body (1). Temperature control thermocouples (9) are also arranged on the outer side of the furnace body (1). The electric heating wires (8) in each annealing chamber are independently arranged. The electric heating wires (8) and temperature control thermocouples (9) are connected to the control system.

2. An annealing method for a single-chamber multi-temperature zone vacuum annealing furnace, implemented based on the single-chamber multi-temperature zone vacuum annealing furnace described in claim 1, characterized in that, Includes the following steps: S1, open the sealed feed door on the furnace body (1), put the annealing elements into different annealing chambers according to the temperature requirements of each annealing element, and turn the isolation valve (3) by driving the motor (11) to close the isolation valve and turn on the vacuum device to create a vacuum environment inside the furnace body (1). S2, the control system turns on the electric heating wire (8) to heat, and adjusts the temperature of the electric heating wire (8) in each annealing chamber according to the temperature data transmitted back by the temperature control thermocouple (9) so that each annealing chamber reaches the preset temperature; S3. After annealing, open the isolation valve (3), turn on the rapid cooling device to cool the entire furnace body (1), and open the sealed discharge door to take out the annealing elements.

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