Nitriding shaft hanging tool and assembling method

Abstract

The invention relates to the technical field of nitriding shaft machining auxiliary tools, and discloses a nitriding shaft hanging tool and an assembling method.The nitriding shaft hanging tool comprises a nitriding shaft body, a hanging assembly and a connecting assembly, and the connecting assembly is used for fixing the hanging assembly to one end of the nitriding shaft body. According to the invention, the lifting ring is welded on the cover plate, the connecting bolt is inserted from the through hole of the cover plate, and one end of the connecting bolt is screwed into the screw hole, so that the cover plate is fixed on the surface of the nitriding shaft body through the connecting bolt, after the nitriding work is completed, the nitriding shaft body is horizontally placed, and finally the connecting bolt is screwed out; the hanging tool is easy to manufacture and convenient to operate, the working efficiency is improved, only the screw holes need to be formed in the end of the nitriding shaft body, the surface quality of the nitriding shaft body is prevented from being damaged, cracks are prevented from being generated on the surface of the nitriding shaft body, the nitriding shaft body is prevented from being scrapped, and the hanging tool can be repeatedly used and is low in manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of auxiliary tooling technology for nitrided shaft machining, specifically to a nitrided shaft hanging tooling and assembly method. Background Technology

[0002] Nitrided shafts have extremely high surface hardness and wear resistance far exceeding that of ordinary quenched and tempered shafts. They can withstand frequent friction and impact. The nitriding temperature is low, resulting in minimal shaft deformation. No extensive subsequent machining and correction are required. The nitride layer formed on the surface has a certain degree of corrosion resistance and can adapt to mildly corrosive environments. They are commonly used in the field of mechanical transmission.

[0003] During the nitriding process, the shaft is usually suspended inside the nitriding tank. Typically, a lifting ring is welded to one end of the shaft to allow it to be vertically suspended in the furnace. However, after the nitriding process is complete, the lifting ring welded to the shaft needs to be cut off using an oxy-acetylene flame. This gas cutting method can easily damage the surface quality of the shaft, and in some cases, it can even cause cracks on the surface of the shaft, leading to its scrapping. Therefore, a nitriding shaft hanging fixture and assembly method is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a nitrided shaft hanging fixture and assembly method to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a nitrided shaft hanging fixture, comprising: Nitrided shafts; A suspension assembly is installed above the nitrided shaft body for suspending the nitrided shaft body during the nitriding process. A connecting component for securing the hanging component to one end of the nitrided shaft.

[0006] As a further explanation of the present invention, the hanging assembly includes a cover plate and a lifting ring. The upper end of the lifting ring is inverted U-shaped, and the two ends of the lifting ring are respectively welded to the left and right ends of the cover plate. The bottom end of the lifting ring is flush with the bottom of the cover plate.

[0007] As a further explanation of the present invention, the connecting assembly includes a plurality of through holes and a plurality of screw holes. The plurality of through holes are evenly opened on the surface of the cover plate, and the plurality of screw holes are evenly opened at the ends of the nitrided shaft. A connecting bolt is inserted through the through hole, and the other end of the connecting bolt is connected to the internal thread of the screw hole.

[0008] As a further illustration of the invention, a lifting assembly is also included, which is used to support the lifting ring assembly on the top of the nitriding tank, thereby supporting the nitriding shaft on the top of the nitriding tank.

[0009] As a further explanation of the present invention, the hoisting assembly includes a grid frame, a baffle, and a pin. The grid frame is placed on top of the nitriding tank during use to support and suspend the hoisting assembly. The baffle is fixedly welded between the left and right sides of the lifting ring. The pin is disposed between the baffle and the grid frame, and the pin is perpendicular to the length direction of the baffle during use.

[0010] As a further explanation of the present invention, the center of the grid frame is shaped like a square. When the grid frame is placed at the top of the nitriding tank, the top of the lifting ring passes through the square gap in the center of the grid frame, so that the nitriding shaft is in the center of the furnace, ensuring that the nitriding shaft is heated and nitrided evenly and reducing distortion.

[0011] An assembly method for a nitrided shaft hanger includes the following steps: S1: Manufacturing tooling; S1.1: Multiple threaded holes are made at the end of the nitrided shaft; S1.2: Make the lifting ring. The lifting ring is made of A3 steel. Heat the part that needs to be deformed with an oxy-acetylene flame to soften it and then bend it into the desired shape. S1.3: Make a baffle, the baffle material is one of E36 and D36 low carbon steel plates, process it with a flame cutting machine and deburr it; S1.4: Manufacture the pin, the pin material is A3 steel; S1.5: Make a cover plate. The cover plate is made of either 20 steel or A3 steel. It is processed with a flame cutting machine and deburred. Through holes are machined by a machine tool. The position and number of through holes are the same as the position and number of screw holes at the top of the nitrided shaft. S1.6: Manufacture a grid frame. The grid frame is made of 20Cr13 stainless steel and is formed by welding four strips of 20Cr13 stainless steel together. S2: Assembly tooling; S2.1: Weld the inner sides of both ends of the bottom of the lifting ring symmetrically to the outer perimeter of the cover plate, and make the bottom of the lifting ring flush with the bottom of the cover plate to ensure the weld length; S2.2: Place the cover plate tightly against the end of the nitrided shaft, aligning the through hole on the cover plate with the screw hole on the nitrided shaft; S2.3: Pass the connecting bolt through the through hole and mate it with the threaded hole of the nitrided shaft. Screw the connecting bolt into the threaded hole inside the nitrided shaft. When the nut on the connecting bolt is close to the cover plate, the length of the connecting bolt screw should be at least 30mm. S3: Place the tooling; S3.1: Attach the upper end of a soft rope to the crane hook and the lower end to the top of the lifting eyelet. Use the soft rope to lift the lifting eyelet, thereby lifting the nitrided shaft along with the crane. S3.2: Then transfer the nitriding shaft into the nitriding tank, lower the nitriding shaft to the bottom of the tank, and pull it to the side of the furnace with a soft rope on the crane before removing it; S3.3: Then, use a crane to lift the grid frame and place it on the top of the tank for fixation. Finally, manually thread a soft rope through the U-shaped gap in the center of the grid frame, and use the crane's soft rope to lift the lifting ring, so that the upper part of the lifting ring passes through the U-shaped gap of the grid frame until the gap between the baffle and the grid frame is greater than the diameter of the pin. Stop the crane, insert the pin into the lower part of the baffle, and place it on the grid frame. Run the crane down until the baffle falls on the pin, thereby suspending the entire nitrided shaft. Finally, manually unload the soft rope. S3.4: When the nitrided product is taken out of the furnace, first use a soft rope to loop the upper end of the rope around the crane hook and the lower end around the top of the lifting ring, and move it upward so that the soft rope lifts the lifting ring. S3.5: Then pull out the pin, lower the nitriding shaft to the bottom of the tank, pull it to the side of the furnace with the soft rope on the crane and take it down, then use the crane to lift the grid frame and place it on the ground, and then use the crane to lift the nitriding shaft with its soft rope. S3.6: After transferring the nitrided shaft to the ground, place the nitrided shaft horizontally, and finally unscrew the connecting bolts to separate the cover plate from the end of the nitrided shaft.

[0012] Compared with the prior art, the beneficial effects of the present invention are: In this invention, a screw hole is made at the end of the nitriding shaft, a lifting ring is welded to the cover plate, and a connecting bolt is inserted through the through hole of the cover plate. One end of the connecting bolt is screwed into the screw hole, thereby fixing the cover plate to the surface of the nitriding shaft. The nitriding shaft is then lifted to the center of the nitriding tank by lifting the lifting ring, thus suspending the nitriding shaft vertically. This reduces heat treatment distortion and improves the surface quality of the nitriding shaft. After the nitriding process is completed, the nitriding shaft is placed horizontally, and finally the connecting bolt is unscrewed to separate the cover plate from the end of the nitriding shaft. This hanging fixture is simple to manufacture, easy to operate, and improves work efficiency. It only requires a screw hole at the end of the nitriding shaft to avoid damaging the surface quality of the nitriding shaft and causing cracks that would render it unusable. Moreover, it is reusable and has low manufacturing costs. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the present invention; Figure 3 This is a schematic diagram of the nitrided shaft structure of the present invention; Figure 4 This is a schematic diagram of the cover plate structure of the present invention; Figure 5 This is a schematic diagram of the lifting ring structure of the present invention; Figure 6 This is a schematic diagram of the grid frame structure of the present invention.

[0014] In the diagram: 100, nitrided shaft; 200, hanging assembly; 201, lifting ring; 202, cover plate; 300, connecting assembly; 301, screw hole; 302, through hole; 303, connecting bolt; 400, lifting assembly; 401, grid frame; 402, baffle; 403, pin. Detailed Implementation

[0015] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example 1: Please refer to the following: Figures 1-6 The present invention provides a technical solution: a nitriding shaft hanging fixture, including a nitriding shaft 100, a hanging assembly 200 and a connecting assembly 300. The hanging assembly 200 is installed above the nitriding shaft 100 and is used to hang the nitriding shaft 100 during the nitriding process. The connecting assembly 300 is used to fix the hanging assembly 200 to one end of the nitriding shaft 100. Specifically, the hanging assembly 200 is fixed to one end of the nitriding shaft 100 by the connecting assembly 300, and the nitriding shaft 100 is hung above the nitriding tank by the hanging assembly 200.

[0017] As a further explanation of the present invention, the hanging assembly 200 includes a cover plate 202 and a lifting ring 201. The upper end of the lifting ring 201 is inverted U-shaped. The two ends of the lifting ring 201 are welded to the left and right ends of the cover plate 202 respectively. The bottom end of the lifting ring 201 is flush with the bottom of the cover plate 202. Specifically, the inner sides of the bottom ends of the lifting ring 201 are symmetrically welded to the outer periphery of the cover plate 202, so that the bottom of the lifting ring 201 is flush with the bottom of the cover plate 202, ensuring the weld length.

[0018] As a further explanation of the present invention, the connecting assembly 300 includes a plurality of through holes 302 and a plurality of screw holes 301. The plurality of through holes 302 are evenly distributed on the surface of the cover plate 202, and the plurality of screw holes 301 are evenly distributed at the end of the nitrided shaft 100. A connecting bolt 303 is inserted through the through hole 302, and the other end of the connecting bolt 303 is connected to the internal thread of the screw hole 301. Specifically, the cover plate 202 is tightly attached to one end of the nitrided shaft 100, so that the through holes 302 on the cover plate 202 correspond to the screw holes 301 at the end of the nitrided shaft 100, and the connecting bolt 303 is screwed into the through holes 302 and the screw holes 301.

[0019] When selecting connecting bolt 303, the diameter of connecting bolt 303 matches the diameter of screw hole 301 of nitrided shaft 100, and its length is such that when the nut on connecting bolt 303 is in close contact with cover plate 202, the length of the screw screw screwed into screw hole 301 is between 30mm and 40mm.

[0020] As a further illustration of the invention, a lifting assembly 400 is also included, which is used to support the lifting ring 201 assembly on the top of the nitriding tank, thereby supporting the nitriding shaft 100 on the top of the nitriding tank.

[0021] As a further explanation of the present invention, the lifting assembly 400 includes a grid frame 401, a baffle 402, and a pin 403. The grid frame 401 is placed on top of the nitriding tank during use to support and suspend the lifting assembly 200. The baffle 402 is fixedly welded between the left and right sides of the lifting ring 201. The pin 403 is disposed between the baffle 402 and the grid frame 401, and is perpendicular to the length direction of the baffle 402 during use. Specifically, the grid frame 401 is lifted by a crane and placed on... After securing it to the top of the tank, a soft rope is manually threaded through the U-shaped gap in the center of the grid frame 401. The lifting ring 201 is then lifted using the crane's soft rope, with the upper part of the lifting ring 201 passing through the U-shaped gap in the grid frame 401. This continues until the gap between the baffle 402 and the grid frame 401 is larger than the diameter of the pin 403. The crane is then stopped, and the pin 403 is inserted into the lower part of the baffle 402 and placed on the grid frame 401. The crane is then moved downwards until the baffle 402 rests on the pin 403, thus suspending the entire nitrided shaft 100.

[0022] As a further explanation of the present invention, the center of the grid frame 401 is shaped like a square. Specifically, when the grid frame 401 is placed at the top of the nitriding tank, the top of the lifting ring 201 passes through the square-shaped gap in the center of the grid frame 401. The square-shaped gap provides space for the lifting ring 201 to pass through, so that the nitriding shaft is in the center of the furnace, ensuring that the nitriding shaft is heated and nitrided evenly and reducing distortion.

[0023] Example 2: The present invention also provides an assembly method for a nitrided shaft hanger fixture, comprising the following steps: S1: Manufacturing tooling; S1.1: Multiple screw holes 301 are opened at the end of the nitrided shaft 100; S1.2: Make the lifting ring 201. The lifting ring 201 is made of A3 steel. Heat the part that needs to be deformed with an oxy-acetylene flame to soften it and then bend it into the required shape. S1.3: Make baffle 402. The baffle 402 is made of either E36 or D36 low carbon steel plate. It is processed with a flame cutting machine and deburred. S1.4: Manufacture pin 403, the material of pin 403 is A3 steel; S1.5: Make cover plate 202. Cover plate 202 is made of either 20 steel or A3 steel. It is processed with a flame cutting machine and deburred. Through holes 302 are machined by a machine tool. The position and number of through holes 302 are the same as the position and number of screw holes 301 at the top of the nitrided shaft 100. S1.6: Manufacture the grid frame 401. The grid frame 401 is made of 20Cr13 stainless steel and is formed by welding four strips of 20Cr13 stainless steel together.

[0024] S2: Assembly tooling; S2.1: The inner sides of the bottom two ends of the lifting ring 201 are symmetrically welded to the outer periphery of the cover plate 202, so that the bottom of the lifting ring 201 is flush with the bottom of the cover plate 202, ensuring the weld length; S2.2: Place the cover plate 202 tightly against the end of the nitrided shaft 100, so that the through hole 302 on the cover plate 202 is aligned with the screw hole 301 of the nitrided shaft 100.

[0025] S2.3: Pass the connecting bolt 303 through the through hole 302 and engage it with the threaded hole 301 of the nitrided shaft 100. Screw the connecting bolt 303 into the threaded hole 301 inside the nitrided shaft 100. When the nut on the connecting bolt 303 is in close contact with the cover plate 202, the screw length of the connecting bolt 303 should be at least 30mm.

[0026] S3: Place the tooling; S3.1: Loop the upper end of the soft rope onto the crane hook and the lower end of the soft rope onto the top of the lifting eyelet 201. Use the soft rope to lift the lifting eyelet 201, thereby lifting the nitrided shaft 100 together. S3.2: Then transfer the nitriding shaft 100 into the nitriding tank, lower the nitriding shaft 100 to the bottom of the tank, and pull it to the side of the furnace with a soft rope on the crane before removing it; S3.3: Then, use a crane to lift the grid frame 401 and place it on the top of the tank for fixation. Finally, manually thread a soft rope through the U-shaped gap in the center of the grid frame 401 and use the crane's soft rope to lift the lifting ring 201, so that the upper part of the lifting ring 201 passes through the U-shaped gap of the grid frame 401 until the gap between the baffle 402 and the grid frame 401 is greater than the diameter of the pin 403. Stop the crane, insert the pin 403 into the lower part of the baffle 402 and place it on the grid frame 401. Run the crane downwards until the baffle 402 falls on the pin 403, thereby suspending the entire nitrided shaft 100. Finally, manually unload the soft rope. S3.4: When the nitrided product is taken out of the furnace, first use a soft rope to loop the upper end of the rope around the crane hook and the lower end around the top of the lifting ring 201, and move it upwards so that the soft rope lifts the lifting ring 201. S3.5: Then pull out the pin 403, lower the nitrided shaft 100 to the bottom of the tank, pull it to the side of the furnace with the soft rope on the crane and take it down, then use the crane to lift the grid frame 401 and place it on the ground, and then use the crane to lift the nitrided shaft 100 with its soft rope. S3.6: After transferring the nitrided shaft 100 to the ground, place the nitrided shaft 100 horizontally, and finally unscrew the connecting bolt 303 to separate the cover plate 202 from the end of the nitrided shaft 100.

[0027] Working principle: In use, the bottom sides of the lifting ring 201 are symmetrically arranged with the outer sides of the cover plate 202, so that the bottom of the lifting ring 201 is flush with the cover plate 202. Then, the cover plate 202 is tightly attached to one end of the nitrided shaft 100, so that the through hole 302 on the cover plate 202 corresponds to the screw hole 301 at the end of the nitrided shaft 100. The connecting bolt 303 is screwed into the through hole 302 and the screw hole 301. When the nut on the connecting bolt 303 is flush with the cover plate 202, the lifting ring 201 is flush with the cover plate 202. When the screw is tightened, the length of the screw inserted into the screw hole 301 is 30mm-40mm, so that the cover plate 202 is stably installed on the surface of the nitriding shaft 100. Then, the upper end of the soft rope is looped on the crane hook, and the lower end of the soft rope is looped on the top of the lifting ring 201. The lifting ring 201 is lifted by the soft rope, so that the nitriding shaft 100 is lifted together. Then, the nitriding shaft 100 is transferred to the nitriding tank and lowered to the bottom of the tank. The soft rope on the crane is pulled to the side of the furnace and then removed. Then, a crane is used to lift the grid frame 401 and place it on top of the tank for fixation. Finally, a soft rope is manually threaded through the U-shaped gap in the center of the grid frame 401, and the lifting ring 201 is lifted by the crane's soft rope, so that the upper part of the lifting ring 201 passes through the U-shaped gap of the grid frame 401 until the gap between the baffle 402 and the grid frame 401 is greater than the diameter of the pin 403. The crane is then stopped, the pin 403 is inserted into the lower part of the baffle 402 and placed on the grid frame 401, and the crane is moved downward until the baffle 402 falls on the pin 403, thus suspending the entire nitrided shaft 100. Finally, the soft rope is manually removed, so that the nitrided shaft 100 is suspended vertically in the air, reducing the occurrence of heat treatment distortion and improving the surface quality of the nitrided shaft 100. When removing it from the furnace after nitriding, the upper end of the soft rope is first looped around the crane hook, and the lower end is looped around the... At the top of the lifting ring 201, the machine moves upwards, causing the soft rope to lift the lifting ring 201. Then, the pin 403 is pulled out, and the nitrided shaft 100 is lowered to the bottom of the tank. The soft rope on the crane is used to pull it to the side of the furnace and then removed. The crane is then used to lift the grid frame 401 and place it on the ground. The crane is then used to lift the nitrided shaft 100 with its soft rope and transfer it to the ground. The nitrided shaft 100 is then placed horizontally. Finally, the connecting bolt 303 is unscrewed to separate the cover plate 202 from the end of the nitrided shaft 100. This hanging fixture is simple to make, easy to operate, and improves work efficiency. Only a screw hole 301 needs to be opened at the end of the nitrided shaft 100 to avoid damaging the surface quality of the nitrided shaft 100 and causing cracks on the surface of the nitrided shaft 100, which would lead to the scrapping of the nitrided shaft 100. Moreover, it can be reused and has low manufacturing costs.

[0028] 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 nitrogenated axle hanger tooling, characterized by, include: Nitrided shaft (100); A suspension assembly (200) is installed above the nitrided shaft (100) for suspending the nitrided shaft (100) during the nitriding process; A connecting assembly (300) is used to fix the hanging assembly (200) to one end of the nitrided shaft (100).

2. The nitrided shaft hanging fixture according to claim 1, characterized in that, The hanging assembly (200) includes a cover plate (202) and a lifting ring (201). The upper end of the lifting ring (201) is inverted U-shaped. The two ends of the lifting ring (201) are welded to the left and right ends of the cover plate (202) respectively. The bottom end of the lifting ring (201) is flush with the bottom of the cover plate (202).

3. The nitrided shaft hanging fixture according to claim 2, characterized in that, The connecting assembly (300) includes multiple through holes (302) and multiple screw holes (301). The multiple through holes (302) are evenly opened on the surface of the cover plate (202), and the multiple screw holes (301) are evenly opened at the end of the nitrided shaft (100). A connecting bolt (303) is inserted through the through hole (302), and the other end of the connecting bolt (303) is connected to the internal thread of the screw hole (301).

4. The nitrided shaft hanging fixture according to claim 2, characterized in that, It also includes a lifting assembly (400) for supporting the lifting ring (201) assembly on top of the nitriding tank, thereby supporting the nitriding shaft (100) on top of the nitriding tank.

5. The nitrided shaft hanging fixture according to claim 4, characterized in that, The hoisting assembly (400) includes a grid frame (401), a baffle (402), and a pin (403). The grid frame (401) is placed on top of the nitriding tank during use to support and suspend the hoisting assembly (200). The baffle (402) is fixedly welded between the left and right sides of the lifting ring (201). The pin (403) is located between the baffle (402) and the grid frame (401). During use, the pin (403) is perpendicular to the length direction of the baffle (402).

6. The nitrided shaft hanging fixture according to claim 5, characterized in that, The center of the grid frame (401) is shaped like a square. When the grid frame (401) is placed at the top of the nitriding tank, the top of the lifting ring (201) passes through the square gap in the center of the grid frame (401), so that the nitriding shaft is in the center of the furnace, ensuring that the nitriding shaft is heated and nitrided evenly, and reducing distortion.

7. The assembly method of a nitrided shaft hanger according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Manufacturing tooling; S1.1: Multiple screw holes (301) are opened at the end of the nitrided shaft (100). S1.2: Make the lifting ring (201). The lifting ring (201) is made of A3 steel. Heat the part that needs to be deformed with an oxy-acetylene flame to soften it and then bend it into the required shape. S1.3: Make a baffle (402). The baffle (402) is made of either E36 or D36 low carbon steel plate. It is processed with a flame cutting machine and deburred. S1.4: Manufacture the pin (403), the pin (403) material is A3 steel; S1.5: Make a cover plate (202). The cover plate (202) is made of either 20 steel or A3 steel. It is processed by a flame cutting machine and deburred. Through holes (302) are machined by a machine tool. The position and number of through holes (302) are the same as the position and number of screw holes (301) at the top of the nitrided shaft (100). S1.6: Manufacture a grid frame (401). The grid frame (401) is made of 20Cr13 stainless steel and is formed by welding four strips of 20Cr13 stainless steel. S2: Assembly tooling; S2.1: Weld the inner sides of the bottom two ends of the lifting ring (201) symmetrically to the outer periphery of the cover plate (202), and make the bottom of the lifting ring (201) flush with the bottom of the cover plate (202) to ensure the weld length; S2.2: Place the cover plate (202) tightly against the end of the nitrided shaft (100) so that the through hole (302) on the cover plate (202) is aligned with the screw hole (301) of the nitrided shaft (100); S2.3: Pass the connecting bolt (303) through the through hole (302) and engage with the screw hole (301) of the nitrided shaft (100). Screw the connecting bolt (303) into the screw hole (301) inside the nitrided shaft (100). When the nut on the connecting bolt (303) is close to the cover plate (202), the screw length of the connecting bolt (303) should be at least 30mm. S3: Place the tooling; S3.1: Attach the upper end of a soft rope to the crane hook and the lower end of the soft rope to the top of the lifting ring (201). Use the soft rope to lift the lifting ring (201), thereby lifting the nitrided shaft (100) as well. S3.2: Then transfer the nitrided shaft (100) into the nitriding tank, and lower the nitrided shaft (100) to the bottom of the tank. The trolley pulls it to the side of the furnace with a soft rope and then removes it. S3.3: Then, use a crane to lift the grid frame (401) and place it on the top of the tank for fixation. Finally, manually pass the soft rope through the U-shaped gap in the center of the grid frame (401) and use the crane's soft rope to lift the lifting ring (201) so that the upper part of the lifting ring (201) passes through the U-shaped gap of the grid frame (401) until the gap between the baffle (402) and the grid frame (401) is greater than the diameter of the pin (403). Stop running the crane, insert the pin (403) into the lower part of the baffle (402) and place it on the grid frame (401). Run the crane down until the baffle (402) falls on the pin (403), thereby suspending the entire nitrided shaft (100). Finally, manually unload the soft rope. S3.4: When the nitrided product is taken out of the furnace, first put the upper end of the soft rope around the crane hook and the lower end around the top of the lifting ring (201), and move it upward so that the soft rope lifts the lifting ring (201); S3.5: Then pull out the pin (403), lower the nitrided shaft (100) to the bottom of the tank, pull it to the side of the furnace with the soft rope on the crane and take it down, then use the crane to lift the grid frame (401) and place it on the ground, and then use the crane to lift the nitrided shaft (100) with its soft rope. S3.6: After transferring the nitrided shaft (100) to the ground, place the nitrided shaft (100) horizontally, and finally unscrew the connecting bolt (303) to separate the cover plate (202) from the end of the nitrided shaft (100).

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