A gas carburizing furnace for high-pressure heat treatment

Abstract

This invention discloses a gas carburizing furnace for high-pressure heat treatment, relating to the field of carburizing furnace technology. It includes a cylindrical cavity structure. The top of the furnace body is equipped with a furnace cover that isolates the material inside the furnace from air contact. The outer wall of the furnace body is equipped with a movable support for injecting carburizing medium through a pump port on the furnace cover. The upper surface of the furnace cover is equipped with a motor for rotating the rotor inside the furnace body. The interior of the furnace body is equipped with a planar reciprocating mechanism that increases the contact area between the material to be treated and the carburizing medium through the planar reciprocating movement of multiple square toothed plates. The interior of the furnace body is also equipped with a clamping mechanism that clamps the material to be treated through the rotational reciprocating action of a worm gear plate. By utilizing the cooperation of sickle-shaped buckles, a square-opening chamber, and circular toothed plates, the metal products on different sides of the inner shaft of the rotating cylinder are brought into contact with the carburizing medium. Increasing the contact area between the carburizing medium and the metal products can improve the carburizing rate.

Description

Technical Field

[0001] This invention relates to the field of carburizing furnace technology, and more specifically to a gas carburizing furnace for high-pressure heat treatment. Background Technology

[0002] A carburizing furnace is a device used to carburize the surface of low-carbon steel parts. Its function is to penetrate carbon elements into the surface of steel parts at high temperature to increase their hardness and wear resistance. The steel parts to be treated are placed in the carburizing furnace and heated. During the heating process, a medium containing carbon source is supplied into the carburizing furnace, and carbon atoms diffuse from the atmosphere to the surface of the steel parts and form a carburized layer on the surface.

[0003] Currently, a well-type gas carburizing furnace is disclosed in patent publication number "CN203904436U". This device uses an air guide tube set on the upper end of the hanging plate. At both ends of the air guide tube, a fan and a ventilation structure are matched respectively. Through the action of the air guide tube, the airflow generated by the fan can move along a predetermined path, so that the airflow can pass through the hanging fixture in a regular manner, making the carburizing process more uniform and improving the quality of the carburizing process. However, the surface of the metal material is only affected by carbon atoms in the airflow. Therefore, the penetration depth of gas carburizing is relatively shallow. Moreover, since the metal material itself does not move at multiple angles, the uniformity of gas carburizing may be affected. Especially for parts with complex shapes, such as uneven surfaces or workpieces with many internal holes, gas carburizing may not be able to guarantee the uniform distribution of carbon elements on all surfaces, resulting in uneven thickness of the carburized layer.

[0004] Furthermore, compared with the device in the document and other existing mature technologies, the following shortcomings still exist in practical use:

[0005] 1. Existing technologies typically employ gas carburizing when performing medium carburizing. Gas carburizing usually involves adjusting the direction of the airflow or setting a specific route to allow carbon atoms to diffuse onto the metal surface. However, it only involves planning the direction of the airflow, and the metal material itself does not move at multiple angles. In this case, gas carburizing requires a long processing time to ensure that the carbon elements can fully penetrate the metal surface, which may lead to a decrease in production efficiency, especially in mass production. At the same time, gas carburizing can only be achieved through the linear transport of carbon atoms in the airflow, which may also lead to uneven distribution of the carburized layer on the surface, resulting in uneven thickness variations even within the same time period.

[0006] 2. In existing gas carburizing techniques for metallic materials, the metal surface is rarely clamped due to the tendency for thermal expansion at high temperatures, leading to stress concentration and deformation. However, this can result in gaps or incomplete sealing between the metal surface and the carburizing medium. Consequently, carbon atoms in the carburizing medium may not fully contact the metal surface, leading to uneven carburizing and variations in the thickness and hardness of the carburized layer across different areas. Furthermore, the gaps between the metal surface and the carburizing medium limit the diffusion depth of carburized atoms. When the carburizing medium cannot fully contact the metal surface, the depth of the carburized layer may not meet requirements, resulting in unsatisfactory carburizing effects.

[0007] Therefore, in view of this, the present invention proposes a gas carburizing furnace for high-pressure heat treatment to make up for and improve the deficiencies of the prior art. Summary of the Invention

[0008] To address the aforementioned technical problems, the present invention provides a gas carburizing furnace for high-pressure heat treatment, thereby resolving the technical issues raised in the background section.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a gas carburizing furnace for high-pressure heat treatment, comprising a furnace body with a cylindrical cavity structure, a furnace cover at the top of the furnace body to isolate air from contact with the material inside the furnace, a movable support for injecting carburizing medium through a pump port on the furnace cover on the outer wall of the furnace body, a motor for rotating the rotor inside the furnace body on the upper surface of the furnace cover, a planar reciprocating mechanism inside the furnace body to increase the contact surface between the material to be treated and the carburizing medium by the planar reciprocating movement of multiple square toothed plates, a clamping mechanism inside the furnace body to clamp the material to be treated by the rotation and resetting action of a worm gear plate, and an eccentric stirring mechanism inside the furnace body to generate centrifugal force to promote the diffusion of the carburizing medium to the metal surface by the left and right reciprocating movement of a sliding plate groove.

[0010] Furthermore, the planar reciprocating mechanism includes a square-opening compartment fixedly installed on the inner wall of the carbon furnace body. A circular toothed plate is fixedly installed at the center of the upper surface of the square-opening compartment away from the carbon furnace body. A drive shaft is rotatably connected to the output shaft end of the motor. A drive housing is fixedly installed on the outer wall of the drive shaft. The interior of the square-opening compartment is slidably connected to the square toothed plate. The circular toothed plate is fixedly installed on the outer wall of the drive housing.

[0011] Furthermore, the planar reciprocating mechanism also includes an A-type opening chamber fixedly installed inside the square opening chamber. Four A-type opening chambers are symmetrically arranged around the center of the square opening chamber. The inner walls of the four square opening chambers are rotatably connected with sickle-shaped buckles. The square toothed plate and the circular toothed plate mesh with each other. A circular groove is fixedly installed in the center of the inside of the square opening chamber. The gap between one outer wall of the A-type opening chamber and the circular groove is adapted to the gap between the other outer wall of the A-type opening chamber and the square opening chamber.

[0012] Furthermore, the clamping mechanism includes a rotating inner shaft fixedly installed on the upper surface of the square toothed plate. A rotating outer shell is rotatably connected to both the upper and lower sides of the outer wall of the rotating inner shaft near the square toothed plate. The outer wall of the rotating outer shell away from the rotating inner shaft is rotatably connected to the upper surface of the square toothed plate. A long telescopic rod is slidably connected to the outer wall of the rotating inner shaft away from the square toothed plate. Two long telescopic rods are symmetrically arranged with the center of the rotating inner shaft as the center. The outer walls of the two long telescopic rods near the rotating inner shaft are fixedly installed on the upper surface of the rotating inner shaft. The outer walls of the two long telescopic rods near the rotating outer shell are fixedly installed on the upper surface of the rotating outer shell.

[0013] Furthermore, the clamping mechanism also includes short telescopic rods slidably connected to the outer surface of the end of the inner shaft of the rotating drum away from the square opening compartment. Two short telescopic rods are symmetrically arranged around the center of the inner shaft of the rotating drum. The outer wall of the two short telescopic rods near the inner shaft of the rotating drum is fixedly installed on the upper surface of the inner shaft of the rotating drum. The outer wall of the two short telescopic rods near the outer shell of the rotating drum is fixedly installed on the upper surface of the outer shell of the rotating drum. The outer wall of the outer shell of the rotating drum is fixedly installed with the worm gear plate. A worm is provided on the outer wall of the worm gear plate on the side away from the outer shell of the rotating drum.

[0014] Furthermore, the worm is rotatably connected to the upper surface of the square toothed plate, and the worm wheel plate meshes with the worm.

[0015] Furthermore, the eccentric stirring mechanism includes a tank shell fixedly installed on the inner wall of the carbon furnace body. The tank shell has a sliding groove inside, and a sliding plate groove is slidably connected in the sliding groove inside the tank shell. The sliding plate groove has a slide rail inside, and a rotating shaft is slidably connected in the slide rail inside the sliding plate groove. A connecting shaft is rotatably connected through the eccentric part of the upper surface of the rotating shaft. Opening slots are provided through the two outer walls of the tank shell away from the sliding plate groove.

[0016] Furthermore, the eccentric stirring mechanism also includes connecting rods rotatably connected to the outer wall of the rotating shaft near the outer shell of the tank. Two connecting rods are symmetrically arranged around the center of the connecting shaft. Connecting rods are rotatably connected to the outer walls of the ends of the two connecting rods away from the rotating shaft. Two connecting rods are symmetrically arranged around the center of the connecting shaft. Rotating rods are rotatably connected to the outer walls of the ends of the two rotating rods away from the connecting rods. Rotating rods are rotatably connected to the outer walls of the ends of the two rotating rods away from the connecting rods. Opening plates are rotatably connected to the ends of the two rotating rods away from the rotating rods.

[0017] Furthermore, the opening plate is slidably connected to the opening slots that are opened through the outer walls of the tank shell on both sides away from the slide plate tank, and six stirring blades are fixedly installed through the outer wall of the connecting shaft.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] (1) This invention utilizes the cooperation of sickle-shaped buckle, square opening chamber and circular toothed plate to achieve contact between the carburizing medium and metal products on different sides of the inner shaft of the rotating drum. Increasing the contact area between the carburizing medium and the metal products can improve the carburizing rate. When the carburizing medium is in more sufficient contact with the metal surface, the carbon atoms in the carburizing agent are more likely to diffuse to the metal surface, which accelerates the carburizing reaction. At the same time, by increasing the contact area, the carburizing medium can be evenly distributed on the surface of the metal products. This helps to ensure that the entire metal surface can be uniformly carburized and avoid uneven carburizing, improve the consistency and quality of the carburized layer. Increasing the contact area between the carburizing medium and the metal surface can reduce the thickness gradient of the carburized layer. At the same time, by increasing the contact area, the carburizing agent can be more evenly distributed on the metal surface, reducing the thickness gradient and reducing non-uniformity.

[0020] (2) The present invention utilizes a rotating cylinder, a long telescopic rod, and a short telescopic rod in cooperation to reduce the gap between the symmetrically slidingly connected long telescopic rod and the short telescopic rod, thereby clamping the metal product. Clamping the metal surface can increase the contact force between the carburizing medium and the metal surface, making them more closely connected. This helps to improve the adhesion and diffusion of the carburizing agent on the metal surface, promote the carburizing reaction, and clamping the metal surface can effectively prevent gas penetration during the carburizing process. At the same time, clamping the metal surface can effectively seal the gaps of the metal product, prevent gas penetration, ensure the quality and uniformity of the carburized layer, and clamping the metal surface can limit its deformation and warping at high temperatures. By clamping the metal surface, constraints and support can be provided, reducing the degree of deformation and warping, and maintaining the geometric shape and dimensional stability of the metal product.

[0021] (3) This invention utilizes the cooperation of connecting shaft, connecting rod and stirring blade. The asymmetry of the eccentrically installed stirring blade causes the carburizing medium to generate eddies and shear forces during rotation, which helps to push the carburizing medium to various areas of the metal surface, enhances permeability, and makes the carburizing effect more uniform and in-depth. At the same time, the rotation of the eccentric stirring mechanism can increase the carburizing reaction rate. The rotation of the eccentric stirring mechanism makes the contact between the carburizing medium and the metal surface more sufficient, promotes the transfer of carburizing reaction substances and the increase of reaction rate. The rotation of the eccentric stirring mechanism helps to improve the uniformity of carburizing. Through the rotation of the eccentric stirring mechanism, the unevenness of the carburizing medium on the metal surface can be reduced, making the thickness of the carburized layer more uniform and reducing the possible adverse carburizing conditions. Attached Figure Description

[0022] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a partial three-dimensional structural diagram of the planar reciprocating mechanism of the present invention;

[0024] Figure 3 For the present invention Figure 2 A magnified three-dimensional structural diagram of a portion of point A in the middle;

[0025] Figure 4 This is a partial three-dimensional structural schematic diagram of the planar reciprocating mechanism of the present invention (sectional view).

[0026] Figure 5 For the present invention Figure 3 A magnified three-dimensional structural diagram of a portion of point B in the middle;

[0027] Figure 6 This is a partial three-dimensional structural schematic diagram of the clamping mechanism of the present invention in cross-section;

[0028] Figure 7 This is a partial three-dimensional structural diagram of the eccentric stirring mechanism of the present invention;

[0029] Figure 8 For the present invention Figure 7 A magnified three-dimensional structural diagram of a portion at point D;

[0030] Figure 9 This is a three-dimensional structural diagram showing the positional relationship of the stirring blades in this invention;

[0031] Figure 10 For the present invention Figure 9 A magnified three-dimensional structural diagram of a portion at point D.

[0032] The following are the labels in the diagram: 1. Furnace body; 11. Movable support; 12. Furnace cover; 13. Motor; 2. Planar reciprocating mechanism; 21. Square opening chamber; 22. Circular toothed plate; 23. Drive shaft; 2301. Drive housing; 24. Square toothed plate; 25. Type A opening chamber; 26. Sickle-shaped buckle; 3. Clamping mechanism; 31. Inner shaft of the rotating drum; 32. Rotating drum housing; 33. Long telescopic rod; 34. Short telescopic rod; 35. Worm gear plate; 36. Worm; 4. Eccentric stirring mechanism; 41. Connecting shaft; 42. Rotating shaft; 43. Slide plate trough; 44. Tank housing housing; 45. Connecting rod; 46. Connecting rod; 47. Rotating rod; 48. Rotating rod; 49. Opening plate; 410. Stirring blade. Detailed Implementation

[0033] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] Embodiments of the present invention

[0035] Please refer to Figure 1 As shown, a gas carburizing furnace for high-pressure heat treatment includes a furnace body 1 with a cylindrical cavity structure. The top of the furnace body 1 is provided with a furnace cover 12 to isolate the material inside the furnace from air contact. The outer wall of the furnace body 1 is provided with a movable support 11 that injects carburizing medium through a pump port on the furnace cover 12. The upper surface of the furnace cover 12 is provided with a motor 13 for rotating the rotor inside the furnace body 1.

[0036] Please refer to Figure 1 As shown, the interior of the carbon furnace body 1 is provided with a planar reciprocating mechanism 2, which increases the contact area between the material to be processed and the carburizing medium by moving the plane back and forth of multiple square toothed plates 24; the interior of the carbon furnace body 1 is provided with a clamping mechanism 3, which clamps the material to be processed by rotating and resetting the worm gear plate 35; and the interior of the carbon furnace body 1 is provided with an eccentric stirring mechanism 4, which generates centrifugal force by moving the slide groove 43 left and right to promote the diffusion of the carburizing medium to the metal surface.

[0037] Please refer to Figure 2As shown, preferably, the planar reciprocating mechanism 2 includes a square-opening compartment 21 fixedly installed on the inner wall of the carbon furnace body 1. A circular toothed plate 22 is fixedly installed at the center of the upper surface of the square-opening compartment 21 on the side away from the carbon furnace body 1. A drive shaft 23 is rotatably connected to the output shaft end of the motor 13. A drive housing 2301 is fixedly installed on the outer wall of the drive shaft 23. The interior of the square-opening compartment 21 is slidably connected to the square toothed plate 24. The circular toothed plate 22 is fixedly installed on the outer wall of the drive housing 2301. ， When the side of the sickle-shaped buckle 26 near the square opening chamber 21 deflects to the right, it will cause the side of the sickle-shaped buckle 26 near the circular toothed plate 22 to deflect to the right simultaneously. This will cause the square toothed plate 24 to move and deflect to the left, thereby enabling the metal products on different sides of the inner shaft 31 of the rotating drum to contact the carburizing medium.

[0038] Please refer to Figure 3 As shown, preferably, the planar reciprocating mechanism 2 also includes an A-type opening chamber 25 fixedly installed inside the square opening chamber 21. Four A-type opening chambers 25 are symmetrically arranged around the center of the square opening chamber 21. The inner walls of the four square opening chambers 21 are rotatably connected with sickle-shaped buckles 26. A circular toothed plate 22 is fixedly installed on the outer wall of the drive housing 2301. The square toothed plate 24 and the circular toothed plate 22 mesh with each other. A circular groove is fixedly installed in the center of the inside of the square opening chamber 21. The gap between one side of the outer wall of the A-type opening chamber 25 and the circular groove and the gap between the other side of the outer wall of the A-type opening chamber 25 and the square opening chamber 21 are matched. When the carburizing medium is in more sufficient contact with the metal surface, the carbon atoms in the carburizing agent are more likely to diffuse to the metal surface, accelerating the carburizing reaction. At the same time, by increasing the contact area, the carburizing medium can be evenly distributed on the surface of the metal product, which helps to ensure that the entire metal surface can be uniformly carburized.

[0039] Please refer to Figure 4 As shown, preferably, the clamping mechanism 3 includes a rotating inner shaft 31 fixedly installed on the upper surface of the square toothed plate 24. A rotating outer shell 32 is rotatably connected to the outer wall of the rotating inner shaft 31 near the square toothed plate 24. The outer wall of the rotating outer shell 32 away from the rotating inner shaft 31 is rotatably connected to the upper surface of the square toothed plate 24. A long telescopic rod 33 is slidably connected to the outer wall of the rotating inner shaft 31 away from the square toothed plate 24. Two long telescopic rods 33 are symmetrically arranged with the center of the rotating inner shaft 31 as the center. The outer walls of the two long telescopic rods 33 near the rotating inner shaft 31 are fixedly installed on the upper surface of the rotating inner shaft 31. The outer walls of the two long telescopic rods 33 near the rotating outer shell 32 are fixedly installed on the upper surface of the rotating outer shell 32. As the rotating outer shell 32 rotates counterclockwise, the long telescopic rods 33 and the short telescopic rods 34 will extend and retract, thereby reducing the gap between the symmetrically slidably connected long telescopic rods 33 and the short telescopic rods 34.

[0040] Please refer to Figure 5 As shown, preferably, the clamping mechanism 3 further includes a short telescopic rod 34 slidably connected to the outer surface of the end of the inner shaft 31 away from the square opening chamber 21. Two short telescopic rods 34 are symmetrically arranged around the center of the inner shaft 31. The outer wall of the two short telescopic rods 34 near the inner shaft 31 is fixedly installed on the upper surface of the inner shaft 31. The outer wall of the two short telescopic rods 34 near the outer wall of the outer shell 32 is fixedly installed on the upper surface of the outer shell 32. The outer wall of the outer shell 32 is fixedly installed with the worm gear plate 35. A worm 36 is provided on the outer wall of the worm gear plate 35 away from the outer shell 32. Clamping the metal surface can increase the contact force between the carburizing medium and the metal surface, making them contact more closely. This helps to improve the adhesion and diffusion of the carburizing agent on the metal surface, promotes the carburizing reaction, and clamping the metal surface can effectively prevent gas penetration during the carburizing process.

[0041] Please refer to Figure 6 As shown, preferably, the worm 36 is rotatably connected to the upper surface of the square toothed plate 24, and the worm wheel plate 35 meshes with the worm 36.

[0042] Please refer to Figure 7 , Figure 8 As shown, preferably, the eccentric stirring mechanism 4 includes a tank shell 44 fixedly installed on the inner wall of the carbon furnace body 1. The tank shell 44 has a sliding groove inside, and a sliding plate groove 43 is slidably connected in the sliding groove inside the tank shell 44. The sliding plate groove 43 has a sliding rail inside, and a rotating shaft 42 is slidably connected in the sliding rail inside the sliding plate groove 43. A connecting shaft 41 is rotatably connected through the eccentric part of the upper surface of the rotating shaft 42. Opening slots are opened through the two outer walls of the tank shell 44 away from the sliding plate groove 43. The connecting shaft 41 is rotatably connected to the connecting rod 45 through the connecting shaft 41. A plurality of stirring blades 410 are fixedly installed on the outer wall of the connecting rod 45. As the connecting shaft 41 rotates, it will drive the stirring blades 410 to rotate. Thus, the rotation of the stirring blades 410 installed on the eccentric shaft can generate a strong centrifugal force.

[0043] Please refer to Figure 9As shown, preferably, the eccentric stirring mechanism 4 further includes a connecting rod 45 rotatably connected to the outer wall of the rotating shaft 42 near the outer shell 44 of the tank body. Two connecting rods 45 are symmetrically arranged around the connecting shaft 41. A connecting rod 46 is rotatably connected to the outer wall of the two connecting rods 45 away from the rotating shaft 42. Two connecting rods 46 are symmetrically arranged around the connecting shaft 41. A rotating rod 47 is rotatably connected to the outer wall of the two connecting rods 46 away from the connecting rod 45. Two rotating rods 47 are symmetrically arranged around the connecting shaft 41. A rotating rod 48 is rotatably connected to the outer wall of the two rotating rods 47 away from the connecting rod 46. Two rotating rods 48 are symmetrically arranged around the connecting shaft 41. An opening plate 49 is rotatably connected to the end of the two rotating rods 48 away from the rotating rod 47. The asymmetry of the eccentrically installed stirring blades 410 causes the carburizing medium to generate eddies and shear forces during rotation, which helps to push the carburizing medium to various areas of the metal surface, enhances permeability, and makes the carburizing effect more uniform and in-depth.

[0044] Please refer to Figure 10 As shown, preferably, the opening plate 49 is slidably connected to the opening slots that are opened through the outer walls of the tank shell 44 away from the slide plate tank 43, and six stirring blades 410 are fixedly installed through the outer wall of the connecting shaft 41.

[0045] The following are the complete usage steps and working principle of the above embodiments:

[0046] The device is mainly used to: place the metal products to be carburized into the carbon furnace body 1. These metal products are usually steel materials, and a carbon-rich carburized layer needs to be formed on the surface to improve hardness and wear resistance. Secondly, the carbon furnace body 1 provides heat through a heat source such as an electric heater or a gas flame to raise the temperature in the furnace cavity to the required carburizing temperature. Once the carburizing temperature is reached, the carburizing agent, usually a solid or liquid containing carbon, is added into the furnace cavity through the pump port on the motor 13. The carburizing agent will decompose at high temperature and release carbon atoms. These carbon atoms will penetrate into the metal surface. Under the action of the carburizing agent, the carbon atoms will penetrate into the metal surface and combine with the metal atoms to form a carbon-rich carburized layer.

[0047] The planar reciprocating mechanism 2, used to increase the contact surface between the carburizing medium and the metal product, is used in the following specific applications:

[0048] like Figure 2 As shown, the metal product is first placed manually into the inner shaft 31 of the rotating drum. Since the furnace body 1 itself starts the motor 13 to drive the rotor during use, it increases the movement and convection of the material, which helps improve the heat transfer effect, thus... Figure 4As shown, a drive shaft 23 is rotatably connected to the output shaft end of the motor 13, and a drive housing 2301 is fixedly installed on the outer wall of the drive shaft 23. The motor 13 starts, driving the drive shaft 23 to rotate, and the rotation of the drive shaft 23 synchronously drives the drive housing 2301 to rotate. Furthermore, a circular toothed plate 22 is fixedly installed at the bottom end of the drive housing 2301. Since the drive housing 2301 rotates along with the drive shaft 23, the circular toothed plate 22 will also rotate along with the rotation of the drive housing 2301. Figure 3 As shown, since the circular toothed plate 22 and the square toothed plate 24 mesh with each other, and the square toothed plate 24 is slidably connected to the inside of the square opening compartment 21, when the circular toothed plate 22 rotates, it will drive the square toothed plate 24 to rotate, and at the same time push the square toothed plate 24 to slide inside the square opening compartment 21. Furthermore, four A-type opening compartments 25 are symmetrically fixedly installed inside the square opening compartment 21 with respect to the center of the square opening compartment 21, and the inner wall of the A-type opening compartment 25 is rotatably connected with a sickle-shaped buckle 26. Therefore, when the square toothed plate 24 slides to abut against the sickle-shaped buckle 26... When the square toothed plate 24 is slid again, the side of the sickle-shaped buckle 26 near the square opening chamber 21 will deflect to the right as the square toothed plate 24 slides. When the side of the sickle-shaped buckle 26 near the square opening chamber 21 deflects to the right, it will drive the side of the sickle-shaped buckle 26 near the circular toothed plate 22 to deflect to the right. This will cause the square toothed plate 24 to deflect to the left while moving, so that the metal products on different sides of the inner shaft 31 of the rotating drum come into contact with the carburizing medium, increasing the contact area between the carburizing medium and the metal products, thereby ensuring that each area is evenly covered.

[0049] Summary 1: Compared with existing technologies that only allow the carburizing medium to contact metal products at one angle, this technology achieves a situation where, when the side of the sickle-shaped latch 26 near the square opening chamber 21 deflects to the right, it also causes the side of the sickle-shaped latch 26 near the circular toothed plate 22 to deflect to the right simultaneously. This, in turn, causes the square toothed plate 24 to move and deflect to the left. This allows the carburizing medium to contact metal products on different sides of the inner shaft 31 of the rotating drum. Increasing the contact area between the carburizing medium and the metal product can improve the carburizing rate. When the carburizing medium has more sufficient contact with the metal surface, carbon atoms in the carburizing agent can more easily diffuse to the metal surface, accelerating the carburizing reaction. The process should be carried out accordingly. At the same time, by increasing the contact area, the carburizing medium can be evenly distributed on the surface of the metal product. This helps to ensure that the entire metal surface can be uniformly carburized and avoid uneven carburizing, thereby improving the consistency and quality of the carburized layer. Increasing the contact area between the carburizing medium and the metal surface can reduce the thickness gradient of the carburized layer. If the thickness gradient of the carburized layer is too large, it may lead to uneven quality of the carburized layer, or even cause problems such as stress concentration and cracking. By increasing the contact area, the carburizing agent can be more evenly distributed on the metal surface, reducing the thickness gradient and reducing unevenness.

[0050] Clamping mechanism 3, used to improve carburizing uniformity, is specifically used as follows:

[0051] like Figure 5 As shown, when the operator places the metal product inside the inner shaft 31 of the rotating drum, the outer shell 32 of the rotating drum will first move horizontally in sync with the square toothed plate 24, as... Figure 6 As shown, when the square toothed plate 24 moves to the sickle-shaped latch 26 and deflects to the left, since the rotating drum housing 32 is rotatably connected to the upper surface of the square toothed plate 24, the deflection of the square toothed plate 24 will simultaneously drive the rotating drum housing 32 to rotate. At this time, the worm gear plate 35 fixedly installed on the outer wall of the rotating drum housing 32 will move on the worm 36 as the rotating drum housing 32 rotates. Thus, the rotating drum housing 32 first rotates counterclockwise, as... Figure 5 As shown, when the rotating drum shell 32 rotates counterclockwise, the long telescopic rod 33, which is symmetrically slidably connected, is fixedly installed on the upper surface of the rotating drum shell 32 at one end, and the short telescopic rod 34, which is symmetrically slidably connected, is fixedly installed on the upper surface of the rotating drum shell 32 at one end. As the rotating drum shell 32 rotates counterclockwise, the long telescopic rod 33 and the short telescopic rod 34 will extend and retract synchronously, thereby reducing the gap between the long telescopic rod 33 and the short telescopic rod 34, which are symmetrically slidably connected, thus clamping the metal product.

[0052] Summary 2: Compared with existing technologies, when carburizing metal materials, clamping is not performed. As the outer shell 32 of the rotating cylinder rotates counterclockwise, the long telescopic rod 33 and the short telescopic rod 34 extend and retract synchronously. This reduces the gap between the symmetrically slidingly connected long telescopic rod 33 and the short telescopic rod 34, thereby clamping the metal product. Clamping the metal surface increases the contact force between the carburizing medium and the metal surface, making them more closely connected. This helps to improve the adhesion and diffusion of the carburizing agent on the metal surface, promotes the carburizing reaction, and effectively prevents gas penetration during the carburizing process. If the metal surface is not clamped, the gas in the carburizing medium may enter the metal through tiny gaps, causing uneven formation or defects in the carburized layer. Clamping the metal surface can effectively seal these gaps, prevent gas penetration, and ensure the quality and uniformity of the carburized layer. Clamping the metal surface can also limit its deformation and warping at high temperatures. During the carburizing process, the metal material is subjected to high temperature and the action of the carburizing agent, which may cause thermal expansion and shape changes. By clamping the metal surface, a certain degree of constraint and support can be provided, reducing the degree of deformation and warping, and maintaining the geometric shape and dimensional stability of the metal product.

[0053] When using the eccentric stirring mechanism 4 for eccentric rotation:

[0054] like Figure 8As shown, when the drive shaft 23 is fixedly installed at the bottom of the motor 13, after the motor 13 starts and drives the drive shaft 23 to rotate, the end of the drive shaft 23 away from the motor 13 is fixedly installed at the eccentric position of the connecting shaft 41, and the bottom end of the connecting shaft 41 is rotatably connected to the rotating shaft 42. Thus, the rotation of the connecting shaft 41 will drive the rotating shaft 42 to rotate. At the same time, the rotating shaft 42 is rotatably connected to the inside of the connecting rod 45. At this time, the rotation of the rotating shaft 42 will cause the connecting rod 45 to slide left and right inside the slide groove 43. It can be seen that when the eccentric rotation amplitude of the connecting shaft 41 is large, the connecting rod 45 will slide left and right inside the slide groove 43. While sliding left and right, the sliding plate 43 is pushed to slide back and forth inside the outer shell 44. When the sliding plate 43 slides towards the side closer to the outer shell 44, it simultaneously pushes the connecting rod 45 to move away from the outer shell 44, and the connecting rod 45 deflects to the left. This deflection of the connecting rod 45 then causes the connecting rod 46 to deflect towards the side closer to the outer shell 44. Furthermore, the deflection of the connecting rod 46 causes the rotating rod 47 to deflect towards the side closer to the outer shell 44. This deflection of the rotating rod 47 then pushes the rotating rod 48 to move backward, thus allowing the opening plate 49 to slide backward inside the outer shell 44. Figure 10 As shown, since the connecting shaft 41 is rotatably connected to the connecting rod 45, and multiple stirring blades 410 are fixedly installed on the outer wall of the connecting rod 45, as the connecting shaft 41 rotates, it will drive the stirring blades 410 to rotate. Thus, the rotation of the stirring blades 410 installed on the eccentric shaft can generate a strong centrifugal force, which promotes the diffusion of the carburizing medium to the metal surface.

[0055] Summary 3: Compared with existing technologies for stirring carburizing media, this method achieves a continuous rotatable connection between the connecting shaft 41 and the connecting rod 45. Multiple stirring blades 410 are fixedly installed on the outer wall of the connecting rod 45. As the connecting shaft 41 rotates, it drives the stirring blades 410 to rotate. The rotation of the stirring blades 410 mounted on the eccentric shaft generates a strong centrifugal force, promoting the diffusion of the carburizing media to the metal surface. The asymmetry of the eccentrically mounted stirring blades 410 causes eddies and shear forces to be generated in the carburizing media during rotation, further pushing the carburizing media towards the metal surface. The eccentric stirring mechanism 4 enhances the permeability of various areas, making the carburizing effect more uniform and in-depth. At the same time, the rotation of the eccentric stirring mechanism 4 can increase the rate of the carburizing reaction. The rotation of the eccentric stirring mechanism 4 makes the contact between the carburizing medium and the metal surface more sufficient, promotes the transfer of carburizing reaction substances and increases the reaction rate. The rotation of the eccentric stirring mechanism 4 also helps to improve the uniformity of carburizing. Through the rotation of the eccentric stirring mechanism 4, the unevenness of the carburizing medium on the metal surface can be reduced, making the thickness of the carburized layer more uniform and reducing the possibility of undesirable carburizing conditions.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas carburizing furnace for high pressure heat treatment, comprising a cylindrical cavity structure of a carbon furnace body (1), the top end of the carbon furnace body (1) is provided with a furnace cover (12) to isolate the contact of air with the furnace materials, the outer wall of the carbon furnace body (1) is provided with a movable support (11) for injecting carburizing medium through the pump port on the furnace cover (12), the upper surface of the furnace cover (12) is provided with a motor (13) for the rotation of the rotor inside the carbon furnace body (1), characterized in that: The inside of the carbon furnace body (1) is provided with a plane reciprocating mechanism (2) which increases the contact surface of the material to be treated with the carburizing medium through the plane reciprocating action of the plurality of square tooth plates (24), the inside of the carbon furnace body (1) is provided with a clamping mechanism (3) which realizes the clamping of the material to be treated through the rotating reset action of the worm gear plate (35), the inside of the carbon furnace body (1) is provided with an eccentric stirring mechanism (4) which generates centrifugal force to promote the diffusion of the carburizing medium to the metal surface through the left and right reciprocating action of the sliding plate groove body (43); The plane reciprocating mechanism (2) comprises a square opening cabin (21) fixedly installed on the inner wall of the carbon furnace body (1), a circular tooth plate (22) is fixedly installed on the center of the upper surface of the side away from the carbon furnace body (1) of the square opening cabin (21), the output shaft end of the motor (13) is rotationally connected with a drive shaft (23), a drive shell (2301) is fixedly installed on the outer wall of the drive shaft (23), the inside of the square opening cabin (21) is in sliding connection with the square tooth plate (24), and the circular tooth plate (22) is fixedly installed on the outer wall of the drive shell (2301); The plane reciprocating mechanism (2) further comprises four A-shaped opening cabins (25) fixedly installed in the inside of the square opening cabin (21), the four A-shaped opening cabins (25) are symmetrically provided at the center of the square opening cabin (21), the inner wall of each of the four square opening cabins (21) is rotationally connected with a sickle-shaped buckle (26), the square tooth plate (24) and the circular tooth plate (22) are in meshing connection with each other, a circular groove table is fixedly installed at the center of the inside of the square opening cabin (21), and the gap between the outer wall of one side of the A-shaped opening cabin (25) and the circular groove table is matched with the gap between the outer wall of the other side of the A-shaped opening cabin (25) and the square opening cabin (21); The clamping mechanism (3) comprises a rotary drum inner shaft (31) fixedly installed on the upper surface of the square tooth plate (24), rotary drum housings (32) are rotationally connected to the upper surface of the square tooth plate (24) on the outer wall of one side of the rotary drum inner shaft (31) and on the outer wall of the other side of the rotary drum inner shaft (31), a long telescopic rod (33) is slidingly connected to the outer surface of one end of the rotary drum inner shaft (31) away from the square tooth plate (24), the two long telescopic rods (33) are symmetrically provided at the center of the rotary drum inner shaft (31), the outer wall of one end of the two long telescopic rods (33) close to the rotary drum inner shaft (31) is fixedly installed on the upper surface of the rotary drum inner shaft (31), and the outer wall of one end of the two long telescopic rods (33) close to the rotary drum housing (32) is fixedly installed on the upper surface of the rotary drum housing (32). The clamping mechanism (3) further comprises a short telescopic rod (34) slidingly connected to the outer surface of the inner shaft (31) of the rotating drum away from the square opening cabin (21), the short telescopic rod (34) is provided with two on the center of the inner shaft (31) of the rotating drum, the two short telescopic rods (34) are fixedly installed on the upper surface of the inner shaft (31) of the rotating drum, the two short telescopic rods (34) are fixedly installed on the upper surface of the rotating drum shell (32) away from the outer wall of the rotating drum shell (32), the outer wall of the rotating drum shell (32) is fixedly installed with the worm plate (35), the worm plate (35) is provided with a worm (36) away from the outer wall of the rotating drum shell (32). The worm (36) is rotatably connected to the upper surface of the square tooth plate (24), and the worm plate (35) and the worm (36) are meshed with each other.

2. A gas carburizing furnace for high pressure heat treatment according to claim 1, characterized in that: The eccentric stirring mechanism (4) comprises a groove shell (44) fixedly installed on the inner wall of the carbon furnace body (1), a sliding groove is formed in the groove shell (44), a sliding plate groove (43) is slidingly connected in the sliding groove formed in the groove shell (44), a sliding rail is formed in the sliding plate groove (43), a rotating shaft (42) is slidingly connected in the sliding rail formed in the sliding plate groove (43), a connecting shaft (41) is rotatably connected through the eccentric upper surface of the rotating shaft (42), and opening grooves are formed in the outer walls of the groove shell (44) away from the sliding plate groove (43).

3. A gas carburizing furnace for high pressure heat treatment according to claim 2, characterized in that: The eccentric stirring mechanism (4) further comprises a connecting rod (45) rotatably connected to the outer wall of the rotating shaft (42) close to the groove shell (44), the connecting rod (45) is provided with two on the center of the connecting shaft (41), a connecting rod (46) is rotatably connected to the outer wall of one end of the connecting rod (45) away from the rotating shaft (42), the connecting rod (46) is provided with two on the center of the connecting shaft (41), a rotating rod (47) is rotatably connected to the outer wall of one end of the connecting rod (46) away from the connecting rod (45), the rotating rod (47) is provided with two on the center of the connecting shaft (41), a rotating rod (48) is rotatably connected to the outer wall of one end of the rotating rod (47) away from the connecting rod (46), the rotating rod (48) is provided with two on the center of the connecting shaft (41), and an opening plate (49) is rotatably connected to the outer wall of one end of the rotating rod (48) away from the rotating rod (47).

4. A gas carburizing furnace for high pressure heat treatment according to claim 3, characterized in that: The opening plate (49) is slidingly connected in the opening groove formed in the outer walls of the groove shell (44) away from the sliding plate groove (43), and six stirring blades (410) are fixedly installed on the outer wall of the connecting shaft (41).

Images