Single-chamber gas quenching vacuum furnace

Abstract

The utility model belongs to the technical field of stove, disclose a single chamber gas quenching vacuum furnace, including vacuum furnace body, the vacuum furnace body includes vacuum inner furnace and vacuum outer furnace, one end of vacuum outer furnace is equipped with air return chamber, and the connecting place of air return chamber and vacuum outer furnace is equipped with fan, the inside of vacuum inner furnace is equipped with heating room, one end of vacuum inner furnace away from fan is equipped with inner furnace door, one end of vacuum outer furnace is equipped with outer furnace door. The utility model discloses through the upper and lower surface of vacuum inner furnace, the outer periphery other parts of inner furnace door and vacuum inner furnace are equipped with multiple one -way air inlet subassembly, and the rotation drive subassembly that is equipped, multi -way air intake and rotating workpiece realize 360 even cooling, reduce deformation, through the auxiliary compression assembly that is equipped, can be adapted to special-shaped or slender workpiece, expands the application range, the output shaft of hydraulic cylinder promotes the fixed compression of auxiliary pressure block to workpiece and presses down, and then cooperates servo motor drive rotating shaft rotation, reduces manual intervention, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of furnace technology, and in particular to a single-chamber gas quenching vacuum furnace. Background Technology

[0002] Single-chamber vacuum quenching furnaces are widely used in the quenching of metallic or non-metallic materials. For example, they are mainly used for bright quenching and tempering of materials such as alloy steel, alloy structural steel, tool and die steel, spring steel, bearing steel, stainless steel, and precision alloy steel, as well as sintering, bright annealing, and vacuum brazing of magnetic materials. They are suitable for both slender shafts and thin-walled long parts, as well as slender and heavy parts, and have a very wide range of applications.

[0003] Traditional single-chamber gas quenching vacuum furnaces have the following technical defects: the gas flows in one direction during quenching, resulting in uneven cooling of the workpiece, easy deformation and cracking, difficulty in adapting to irregular or slender workpieces, easy displacement during rotation, affecting the consistency of heat treatment, and workpiece loading, unloading and positioning rely on manual labor, resulting in low production efficiency. Utility Model Content

[0004] To overcome the technical defects of the existing technology, this utility model provides a single-chamber gas quenching vacuum furnace.

[0005] The technical solution adopted by this utility model is: a single-chamber gas quenching vacuum furnace, including a vacuum furnace body, the vacuum furnace body including a vacuum inner furnace and a vacuum outer furnace, a return air chamber is provided at one end of the vacuum outer furnace, a fan is installed at the connection between the return air chamber and the vacuum outer furnace, a heating chamber is provided inside the vacuum inner furnace, an inner furnace door is provided at the end of the vacuum inner furnace away from the fan, an outer furnace door is provided at one end of the vacuum outer furnace, a number of one-way air outlet components are provided at the end of the vacuum inner furnace facing the fan, a number of one-way air inlet components are provided on the upper and lower surfaces of the vacuum inner furnace, on the inner furnace door and other parts of the outer periphery of the vacuum inner furnace, and a rotary drive component is provided inside the vacuum inner furnace to support and fix the workpiece and rotate the workpiece.

[0006] Preferably, the rotary drive assembly includes a rotary shaft connected to the center of the vacuum furnace via a first sealed bearing, and a support plate for supporting the workpiece is provided on the rotary shaft, with a plurality of through holes formed on the support plate.

[0007] Preferably, the rotating shaft is provided with a mounting strip above the bearing plate, and the bottom end of the mounting strip and the bottom end of the bearing plate above it are both provided with auxiliary clamping components that cooperate with the corresponding bearing plates to fix the workpiece.

[0008] Preferably, the auxiliary clamping assembly includes an electric guide rail disposed at the bottom end of the bearing plate and the mounting strip, a vertically downward hydraulic cylinder is mounted on the slider of the electric guide rail, and the output shaft of the hydraulic cylinder is connected to an auxiliary clamping block.

[0009] Preferably, the top end of the rotating shaft is connected to the top end of the vacuum furnace via a second sealed bearing, and a servo motor for driving the rotating shaft is installed at the top end of the vacuum furnace.

[0010] Preferably, the unidirectional exhaust assembly includes an exhaust pipe disposed on the vacuum furnace facing the blower end, the outer end of the exhaust pipe is inclined, and the outer end of the exhaust pipe is connected to an exhaust cover that flips up and down via a rotating shaft.

[0011] Preferably, the one-way air intake assembly includes an air intake pipe disposed on the vacuum inner furnace and the inner furnace door, the air intake end of the air intake pipe is arc-shaped, the inside of the air intake pipe is provided with a sealing ball that matches the arc shape, the inside of the air intake pipe is provided with a return spring, and the air outlet end of the air intake pipe is provided with a first air outlet hole.

[0012] Preferably, one end of the reset spring is provided with a U-shaped connecting plate, and the end of the connecting plate is connected to a load-bearing plate connected to the sealing ball. A second air outlet is provided on the load-bearing plate.

[0013] The beneficial effects of this utility model are: by providing multiple unidirectional air intake components on the upper and lower surfaces of the vacuum furnace, on the furnace door, and on other parts of the outer periphery of the vacuum furnace, as well as a rotation drive component, multidirectional air intake and rotating workpiece achieve 360° uniform cooling, reducing deformation.

[0014] With its auxiliary clamping components, the system can accommodate irregularly shaped or slender workpieces, expanding its application range. The output shaft of the hydraulic cylinder pushes the auxiliary clamping block down to fix and clamp the workpiece, and then the servo motor drives the rotating shaft to rotate, reducing manual intervention and improving production efficiency. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the connection structure between the mounting strip and the auxiliary pressure block of this utility model;

[0018] Figure 3 For the present utility model Figure 1 Enlarged cross-sectional view of the structure at point A in the middle;

[0019] Figure 4 For the present utility model Figure 1 Enlarged cross-sectional view of the structure at point B.

[0020] Explanation of reference numerals in the attached drawings: 1. Vacuum furnace body; 101. Inner vacuum furnace; 102. Outer vacuum furnace; 2. Return air chamber; 3. Fan; 4. Heating chamber; 5. Inner furnace door; 6. Outer furnace door; 7. One-way exhaust assembly; 701. Exhaust pipe; 702. Exhaust cover; 8. One-way intake assembly; 801. Intake pipe; 802. Sealing ball; 803. Return spring; 804. First exhaust hole; 805. Connecting plate; 806. Load-bearing plate; 807. Second exhaust hole; 9. Rotary drive assembly; 901. First sealed bearing; 902. Rotary shaft; 903. Load-bearing plate; 904. Mounting strip; 905. Electric guide rail; 906. Hydraulic cylinder; 907. Auxiliary pressure block; 908. Second sealed bearing; 909. Servo motor; 9010. Through hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0022] like Figures 1-4 As shown, this embodiment provides a single-chamber gas quenching vacuum furnace, including a vacuum furnace body 1. The vacuum furnace body 1 includes an inner vacuum furnace 101 and an outer vacuum furnace 102. One end of the outer vacuum furnace 102 is provided with a return air chamber 2. A fan 3 is installed at the connection between the return air chamber 2 and the outer vacuum furnace 102. The inner vacuum furnace 101 is provided with a heating chamber 4. The end of the inner vacuum furnace 101 away from the fan 3 is provided with an inner furnace door 5. One end of the outer vacuum furnace 102 is provided with an outer furnace door 6. The end of the inner vacuum furnace 101 facing the fan 3 is provided with several one-way gas outlet components 7. Multiple unidirectional air intake components 8 are provided on the upper and lower surfaces of the furnace 101, on the inner furnace door 5, and on other parts of the outer periphery of the vacuum inner furnace 101. The interior of the vacuum inner furnace 101 is provided with a rotary drive component 9 that supports and fixes the workpiece and rotates the workpiece. The arrangement of the unidirectional air outlet component 7 and the multidirectional unidirectional air intake component 8 can form a three-dimensional circulating airflow, which improves the cooling uniformity. The arrangement of the rotary drive component 9 can realize dynamic quenching of the workpiece, avoiding local overheating or overcooling. The double-layer structure of the vacuum inner furnace 101 and the vacuum outer furnace 102 reduces heat loss.

[0023] The rotary drive assembly 9 includes a rotary shaft 902 connected to the middle of the vacuum furnace 101 via a first sealed bearing 901. The rotary shaft 902 is provided with a support plate 903 for supporting the workpiece. The support plate 903 has several through holes 9010 to accelerate the gas penetration through the gap of the workpiece and improve the heat exchange efficiency.

[0024] The rotating shaft 902 is provided with a mounting strip 904 located above the support plate 903. The bottom end of the mounting strip 904 and the bottom end of the support plate 903 above it are provided with auxiliary clamping components that cooperate with the corresponding support plate 903 to fix the workpiece. The auxiliary clamping components include electric guide rails 905 located at the bottom ends of the support plate 903 and the mounting strip 904. A vertically downward hydraulic cylinder 906 is mounted on the slider of the electric guide rail 905. The output shaft of the hydraulic cylinder 906 is connected to an auxiliary pressure block 907. The auxiliary clamping components adaptively clamp workpieces of different sizes by setting the electric guide rail 905 and the hydraulic cylinder 906, avoiding displacement of the workpiece during rotation and ensuring the consistency of heat treatment.

[0025] The top end of the rotating shaft 902 is connected to the top end of the vacuum furnace 102 via a second sealed bearing 908. A servo motor 909 is installed at the top end of the vacuum furnace 102 to drive the rotating shaft 902 to rotate. The output shaft of the servo motor 909 drives the rotating shaft 9002 to rotate. The arrangement of the first sealed bearing 901 and the second sealed bearing 908 ensures vacuum sealing and avoids gas leakage.

[0026] The one-way exhaust component 7 includes an exhaust pipe 701 located on the vacuum furnace 101 facing the blower 3. The outer end of the exhaust pipe 701 is inclined. The outer end of the exhaust pipe 701 is connected to an exhaust cover 702 that flips up and down via a rotating shaft. The airflow guidance is optimized. When there is negative pressure, the exhaust cover 702 automatically closes to maintain the vacuum level inside the vacuum furnace 101.

[0027] The unidirectional air intake assembly 8 includes an air intake pipe 801 installed on the vacuum furnace 101 and the furnace door 5. The air intake end of the air intake pipe 801 is arc-shaped, and a sealing sphere 802 matching the arc shape is installed inside the air intake pipe 801. A return spring 803 is installed inside the air intake pipe 801, and a first air outlet 804 is installed at the air outlet end of the air intake pipe 801. A U-shaped connecting plate 805 is installed at one end of the return spring 803, and a load-bearing plate 806 connected to the end of the connecting plate 805 is connected to the sealing sphere 802. A second air outlet 807 is opened on the load-bearing plate 806. When under negative pressure, the sealing sphere 802 is pressed by the negative pressure spring 803 to isolate external gas. When under positive pressure quenching, the airflow pushes open the sphere and diffuses through the first air outlet 804 and the second air outlet 807 to improve the uniformity of air intake.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] During operation, the outer furnace door 6 and the inner furnace door 5 are opened in sequence. The workpiece is placed on the support plate 903. The slider of the electric guide rail 905 drives the hydraulic cylinder 906 to move horizontally, which can adjust the position of the auxiliary pressure block 907. The output shaft of the hydraulic cylinder 906 presses down to fix the workpiece in place. After closing the inner furnace door 5 and the outer furnace door 6, the heating chamber 4 is put into operation after vacuuming. The output shaft of the servo motor 909 drives the rotating shaft 902 to rotate, and the workpiece rotates at a uniform speed and is heated. The blower 3 is started, and high-pressure inert gas enters the return air chamber 2. When the vacuum inner furnace 101 is under negative pressure, the sealing ball 802 is tightly attached to the arc opening to prevent gas backflow. The exhaust cover 702 is closed to maintain vacuum under negative pressure and is pushed open by the airflow to exhaust gas under positive pressure.

[0030] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A single-chamber gas quenching vacuum furnace, comprising a vacuum furnace body (1), wherein the vacuum furnace body (1) comprises an inner vacuum furnace (101) and an outer vacuum furnace (102), one end of the outer vacuum furnace (102) is provided with a return air chamber (2), a fan (3) is installed at the connection between the return air chamber (2) and the outer vacuum furnace (102), the inner vacuum furnace (101) is provided with a heating chamber (4), the inner vacuum furnace (101) is provided with an inner furnace door (5) at the end away from the fan (3), and the outer vacuum furnace (102) is provided with an outer furnace door (6) at one end, characterized in that: The vacuum furnace (101) is provided with several one-way air outlet components (7) at one end facing the blower (3). The upper and lower surfaces of the vacuum furnace (101), the inner furnace door (5) and other parts of the outer periphery of the vacuum furnace (101) are provided with multiple one-way air inlet components (8). The interior of the vacuum furnace (101) is provided with a rotary drive component (9) for supporting and fixing the workpiece and rotating the workpiece.

2. The single-chamber gas quenching vacuum furnace according to claim 1, characterized in that: The rotary drive assembly (9) includes a rotary shaft (902) connected to the middle of the vacuum furnace (101) via a first sealed bearing (901). The rotary shaft (902) is provided with a support plate (903) for supporting the workpiece, and the support plate (903) is provided with a plurality of through holes (9010).

3. A single-chamber gas quenching vacuum furnace according to claim 2, characterized in that: The rotating shaft (902) is provided with a mounting strip (904) located above the bearing plate (903). The bottom end of the mounting strip (904) and the bottom end of the bearing plate (903) above it are both provided with auxiliary clamping components that cooperate with the corresponding bearing plate (903) to fix the workpiece.

4. A single-chamber gas quenching vacuum furnace according to claim 3, characterized in that: The auxiliary pressing assembly includes an electric guide rail (905) located at the bottom of the bearing plate (903) and the mounting strip (904). A vertically downward hydraulic cylinder (906) is mounted on the slider of the electric guide rail (905), and the output shaft of the hydraulic cylinder (906) is connected to an auxiliary pressing block (907).

5. A single-chamber gas quenching vacuum furnace according to claim 2, characterized in that: The top end of the rotating shaft (902) is connected to the top end of the vacuum furnace (102) via a second sealed bearing (908). A servo motor (909) for driving the rotating shaft (902) to rotate is installed on the top end of the vacuum furnace (102).

6. A single-chamber gas quenching vacuum furnace according to claim 1, characterized in that: The one-way exhaust assembly (7) includes an exhaust pipe (701) on the vacuum furnace (101) facing the blower (3). The outer end of the exhaust pipe (701) is inclined, and the outer end of the exhaust pipe (701) is connected to an exhaust cover (702) that flips up and down via a rotating shaft.

7. A single-chamber gas quenching vacuum furnace according to claim 1, characterized in that: The one-way air intake assembly (8) includes an air intake pipe (801) provided on the vacuum inner furnace (101) and the inner furnace door (5). The air intake end of the air intake pipe (801) is arc-shaped. The inside of the air intake pipe (801) is provided with a sealing ball (802) that matches the arc shape. The inside of the air intake pipe (801) is provided with a return spring (803). The air outlet end of the air intake pipe (801) is provided with a first air outlet hole (804).

8. A single-chamber gas quenching vacuum furnace according to claim 7, characterized in that: One end of the reset spring (803) is provided with a U-shaped connecting plate (805), and the end of the connecting plate (805) is connected to a load-bearing plate (806) connected to the sealing ball (802). A second air vent (807) is provided on the load-bearing plate (806).

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