Metal material high-toughness carburizing and quenching machining auxiliary device and machining method

Abstract

The invention relates to the technical field of quenching machining, in particular to a metal material high-toughness carburizing and quenching machining auxiliary device and a machining method.The metal material high-toughness carburizing and quenching machining auxiliary device comprises a handheld frame assembly and a clamping assembly, the clamping assembly comprises a bottom clamping block, a rotating rod and a top clamping block, and the bottom clamping block is rotationally connected to the bottom end of the rotating rod; the top clamping block is rotationally connected to the top end of the rotating rod, the side face of the bottom clamping block is fixedly connected with a T-shaped sliding block, the handheld frame assembly comprises a filling rod, a plurality of T-shaped sliding grooves distributed in an annular array mode are vertically formed in the surface of the filling rod, and the T-shaped sliding grooves are matched to be connected with the T-shaped sliding block in an up-down sliding mode; the invention aims to solve the problem that the surface, facing a furnace wall gas release port, of a workpiece and the opposite surface of the workpiece are far away from the gas release port, so that the carburizing gas concentration of one side of the workpiece is greater than that of the back side of the workpiece, and the carburizing of the workpiece is non-uniform.

Description

Technical Field

[0001] The invention relates to the technical field of quenching processing, and in particular to a high-toughness carburizing and quenching processing auxiliary device and a processing method for a metal material. Background Art

[0002] Carburizing and quenching can make the surface of the carburized workpiece obtain very high hardness and improve its wear resistance. Carburizing refers to the process of making carbon atoms penetrate into the surface layer of steel. It also makes the low-carbon steel workpiece have the surface layer of high-carbon steel. After quenching, the surface layer of the workpiece has high hardness and wear resistance, while the center part of the workpiece still retains the toughness and plasticity of low-carbon steel. In actual production, there are many carburizing methods. According to the different states of the medium, it can be divided into three types: solid carburizing, liquid carburizing and gas carburizing. The most widely used is gas carburizing, which is a carburizing process carried out in a gaseous active medium with a carburizing atmosphere. In reality, the most commonly used workpieces that need to be carburized are annular workpieces, such as gears, bearings, etc., which have a large demand.

[0003] The gas release ports of an existing carburizing and quenching furnace are usually distributed on the four walls of the furnace. Distributing the gas release ports around the furnace chamber can allow the gas to be evenly transferred to the workpiece from all sides compared to installing them on the furnace top or bottom, which helps to reduce the unevenness of the gas concentration in the furnace and ensure the uniformity of carburizing of the workpiece. However, even so, for a single workpiece, the surface facing the gas release port of the furnace wall and the surface opposite to it will be far away from the gas release port, resulting in the carburizing gas concentration on one side of the workpiece being greater than that on the opposite side, which will still cause some uneven carburizing of the workpiece. Summary of the invention

[0004] The purpose of the present invention is to provide a high-toughness carburizing and quenching processing auxiliary device and processing method for metal materials, so as to solve the problem that the surface of the workpiece facing the gas release port of the furnace wall and the surface opposite to it are far away from the gas release port, resulting in the carburizing gas concentration on one side of the workpiece being greater than that on the opposite side, making the carburizing of the workpiece somewhat uneven.

[0005] To achieve the above object, the present invention provides the following technical solutions: A high-toughness carburizing and quenching processing auxiliary device for metal materials includes a handheld frame assembly and a clamping assembly, the clamping assembly includes a bottom clamping block, a rotating rod and a top clamping block, the bottom clamping block is rotatably connected to the bottom end of the rotating rod, the top clamping block is rotatably connected to the top end of the rotating rod, the side of the bottom clamping block is fixedly connected with a T-shaped slider, the handheld frame assembly includes a filling rod, and the surface of the filling rod is vertically opened with a plurality of T-shaped grooves arranged in a circular array, and the T-shaped grooves are used for the T-shaped slider to slide up and down.

[0006] Preferably, the top end of the rotating rod is fixedly connected with a first T-shaped rotating shaft, the top clamping block is cooperated with a first T-shaped circular groove for rotationally connecting the first T-shaped rotating shaft, the bottom end of the rotating rod is fixedly connected with a second T-shaped rotating shaft, the bottom clamping block is cooperated with a second T-shaped circular groove for rotationally connecting the second T-shaped rotating shaft, the bottom end of the second T-shaped rotating shaft is fixedly connected with a square embedding block, the top end of the top clamping block is cooperated with a docking hole for embedding the second T-shaped rotating shaft, and the top end of the first T-shaped rotating shaft is cooperated with a third square embedding groove for embedding the square embedding block.

[0007] Preferably, the handcarrying rack assembly further comprises a lifting rod and a positioning block, the lifting rod being fixedly connected to the top of the positioning block, the filling rod being fixedly connected to the top surface of the positioning block, the top of the positioning block being rotatably connected to an auxiliary support block, the top of the auxiliary support block being provided with a first square embedding groove for embedding a square embedding block.

[0008] Preferably, it also includes a carburizing and quenching furnace, the bottom wall of which is installed with a positioning chassis, the upper surface of which is provided with a positioning groove for the positioning block to be embedded, the surface of the positioning chassis is rotatably connected with a linkage rod, the top of the linkage rod is provided with a second square embedding groove for the square embedding block to be embedded, the linkage rod and the auxiliary support block are symmetrically arranged, and the linkage rod is flush with the top surface of the auxiliary support block.

[0009] Preferably, a mounting frame is fixedly connected to the bottom end of the carburizing and quenching furnace, a motor is fixedly mounted on the surface of the mounting frame, the bottom end of the linkage rod movably penetrates the bottom surface of the carburizing and quenching furnace, and the motor is used to drive the linkage rod to rotate.

[0010] A high-toughness carburizing and quenching method for metal materials is performed using the auxiliary device, and the specific steps are as follows: A. Take out a clamping assembly and rotate the top clamping block to make the clamping assembly in a Z shape, then insert the T-shaped slider into the T-shaped slot, and then insert the T-shaped sliders into the remaining T-shaped slots in sequence, and finally put the annular metal piece on the clamping assembly so that the bottom clamping block supports the annular metal piece, and then rotate the top clamping block to make the clamping assembly in a U shape; B. The clamping assembly slides down to the bottom with the annular metal piece, and the square insert on one of the clamping assemblies that falls first is embedded in the first square embedding groove on the auxiliary support block, and the square insert on the clamping assembly that is subsequently filled and dropped is correspondingly embedded in the third square embedding groove on the lower clamping assembly to complete the connection, and so on, until the hand-held rack assembly is filled with the annular metal piece; C. Open the carburizing and quenching furnace, lift the handle, move the hand-held frame assembly, so that the positioning block is embedded in the positioning groove. At the same time, the square embedded block on the other clamping assembly at the bottom is embedded in the second square embedded groove on the linkage rod to complete the connection; D. Start the carburizing and quenching furnace to carburize and heat the annular metal parts in the carburizing and quenching furnace, and start the motor at the same time to drive the linkage rod to rotate, the linkage rod rotates to drive the rotating rod to rotate, and the rotating rod rotates to drive the annular metal parts to rotate; E. Close the carburizing and quenching furnace to stop carburizing, then take out the portable rack assembly, cool the annular metal parts on the portable rack assembly, and complete the quenching.

[0011] Preferably, the diameter of the annular workpiece is between 100 mm and 500 mm, and the rotation speed of the linkage rod is between 10 rpm and 60 rpm.

[0012] Preferably, the diameter of the annular workpiece is 500 mm-1000 mm, and the rotation speed of the linkage rod is 2 rpm-10 rpm.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The annular metal piece can be clamped by placing it between the bottom clamp block and the top clamp block. The rotating rod is in contact with the inner ring of the annular metal piece. By rotating the rotating rod, the annular metal piece can be rotated, which is conducive to making each side of the annular metal piece periodically close to the gas release port, ensuring that the concentration of carburizing gas at each side of the annular metal piece is relatively uniform; 2. The rotating rod rotates to make the annular metal part rotate, so that the contact position between the rotating rod, the first ball, the second ball and the annular metal part changes periodically, which helps to prevent the clamping position between the clamping assembly and the annular metal part from remaining unchanged, resulting in uneven carburization of the clamping position on the surface of the annular metal part; 3. The upper and lower adjacent rotating rods are connected to each other so that when the starting motor drives the linkage rod to rotate, all the rotating rods in the vertical column rotate. By arranging the motor outside the carburizing and quenching furnace, away from the internal heat field of the carburizing and quenching furnace, it is helpful to prevent the motor from being damaged by high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the auxiliary device of the present invention; Figure 2 It is a structural schematic diagram of the positioning chassis of the present invention; Figure 3 For the present invention Figure 2 The enlarged view of point A in the middle; Figure 4 It is a structural schematic diagram of the portable rack assembly of the present invention; Figure 5 For the present invention Figure 4 The enlarged view of point B in the middle; Figure 6 It is a schematic diagram of the structure of the clamping assembly of the present invention; Figure 7 It is a schematic diagram of the vertical section structure of the bottom clamping block and the top clamping block of the present invention; Figure 8 This is an effect diagram of the clamping state of the metal part of the present invention; Fig. 9 It is a structural schematic diagram of the carburizing and quenching furnace of the present invention; Fig.10 It is a schematic structural diagram of a carburizing and quenching furnace and a positioning chassis in vertical section according to the present invention; Fig.11 For the present invention Fig.10 Enlarged view of point C in the middle.

[0015] In the figure: 1. positioning chassis; 2. positioning groove; 3. positioning block; 4. auxiliary support block; 5. first square embedded groove; 6. linkage rod; 7. second square embedded groove; 8. lifting rod; 9. filling rod; 10. T-shaped slide groove; 11. T-shaped slider; 12. bottom clamping block; 13. rotating rod; 14. top clamping block; 15. first ball; 16. second ball; 17. first T-shaped rotating shaft; 18. third square embedded groove; 19. square embedded block; 20. second T-shaped rotating shaft; 21. docking hole; 22. carburizing and quenching furnace; 23. mounting frame; 24. motor; 25. first bevel gear; 26. second bevel gear; 27. transmission shaft; 28. third bevel gear; 29. ​​fourth bevel gear; 30. suspension rod. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example 1

[0018] See also Figures 1 to 11 , the present invention provides a technical solution.

[0019] A high-toughness carburizing and quenching processing auxiliary device for metal materials, including a hand-held frame assembly and a clamping assembly, the clamping assembly includes a bottom clamping block 12, a rotating rod 13 and a top clamping block 14, the bottom clamping block 12 is rotatably connected to the bottom end of the rotating rod 13, the top clamping block 14 is rotatably connected to the top end of the rotating rod 13, the side of the bottom clamping block 12 is fixedly connected with a T-shaped slider 11, the hand-held frame assembly includes a filling rod 9, the surface of the filling rod 9 is vertically opened with a plurality of T-shaped slide grooves 10 arranged in a circular array, and the T-shaped slide grooves 10 cooperate with the supply The T-shaped slider 11 is slidably connected up and down, and the T-shaped slider 11 is embedded in the T-shaped slide groove 10, so that the clamping assembly can move up and down along the track of the T-shaped slide groove 10, which is convenient for installing multiple clamping assemblies from bottom to top in the same T-shaped slide groove 10. When installing the clamping assembly on the filling rod 9, the clamping assembly is filled in at least two T-shaped slide grooves 10 to ensure the stability of the installation of the metal parts and the uniform force, and to ensure that the clamping assemblies after filling are also arranged in a circular array. For example, please refer to Figure 1 , the number of T-shaped chutes 10 on the filling rod 9 is six, and they are arranged in a circular array. Two T-shaped chutes 10 are filled with clamping components. Select two T-shaped chutes 10, one on the left and one on the right, so that the filled clamping components also maintain a circular array arrangement; See also Figure 8 By placing the annular metal part between the bottom clamping block 12 and the top clamping block 14, the annular metal part can be clamped, and the rotating rod 13 is in contact with the inner circle of the annular metal part. By rotating the rotating rod 13, the annular metal part can be rotated, which is beneficial for making each side of the annular metal part periodically close to the gas release port, ensuring that the concentration of carburizing gas at each side of the annular metal part is relatively uniform.

[0020] The top of the rotating rod 13 is fixedly connected with a first T-shaped rotating shaft 17, the top clamping block 14 cooperates with a first T-shaped circular groove for rotationally connecting the first T-shaped rotating shaft 17, the bottom end of the rotating rod 13 is fixedly connected with a second T-shaped rotating shaft 20, the bottom clamping block 12 cooperates with a second T-shaped circular groove for rotationally connecting the second T-shaped rotating shaft 20, the bottom end of the second T-shaped rotating shaft 20 is fixedly connected with a square insert 19, the top of the top clamping block 14 cooperates with a docking hole 21 for embedding the second T-shaped rotating shaft 20, the top of the first T-shaped rotating shaft 17 cooperates with a second T-shaped circular groove for embedding the square insert 19 The length and width of the square insert 19 of the triangular embedding groove 18 are smaller than the diameter of the second T-shaped rotating shaft 20, ensuring that when the second T-shaped rotating shaft 20 is embedded in the docking hole 21, the square insert 19 can also pass through. By setting the second T-shaped rotating shaft 20 to be connected to the first T-shaped rotating shaft 17, the upper and lower clamping components can be connected to each other, and the rotating rod 13 on one of the clamping components is rotated, and the rotating rod 13 on the clamping component connected to it rotates with it, which is conducive to reducing the energy setting and realizing energy saving. The bottom end of the second T-shaped rotating shaft 20 penetrates the bottom clamping block 12. The bottom surface of the bottom clamp block 12 is provided with the bottom end of the second T-shaped rotating shaft 20 penetrating the bottom surface of the bottom clamp block 12, which is conducive to making the distance between the upper and lower clamping components equal to the length of the second T-shaped rotating shaft 20 extending from the bottom surface of the bottom clamp block 12, which is conducive to ensuring the air circulation between the upper and lower annular metal parts during the carburizing heating process in the carburizing quenching furnace 22. The bottom end of the top clamp block 14 is rotatably connected to the first ball 15, and the top end of the bottom clamp block 12 is rotatably connected to the second ball 16. When the annular metal part is placed between the bottom clamp block 12 and the top clamp block 14, the first ball 15 , the second ball 16 is in contact with the surface of the annular metal part, which is beneficial to make the contact between the clamping assembly and the annular metal part point contact, so that the surface of the annular metal part is more exposed, reducing the carburizing dead angle area, and the rotating rod 13 is rotated to make the annular metal part rotate, so that the contact part between the rotating rod 13, the first ball 15, the second ball 16 and the annular metal part changes periodically, which is beneficial to prevent the clamping part of the clamping assembly and the annular metal part from remaining unchanged, resulting in uneven carburization of the clamping part on the surface of the annular metal part.

[0021] The hand-held rack assembly also includes a lifting rod 8 and a positioning block 3. The lifting rod 8 is fixedly connected to the top of the positioning block 3, and the filling rod 9 is fixedly connected to the top surface of the positioning block 3. The top of the positioning block 3 is rotatably connected to an auxiliary support block 4. The top of the auxiliary support block 4 is provided with a first square embedding groove 5 for the square embedding block 19 to be embedded. By setting the auxiliary support block 4, it is beneficial to ensure that the clamping assembly located at the lowest point of all clamping assemblies is separated from the positioning block 3 by a distance of corresponding length, which is beneficial to ensure the air circulation between the clamping assembly located at the lowest point of all clamping assemblies and the positioning block 3 during the carburizing heating process in the carburizing quenching furnace 22.

[0022] It also includes a carburizing and quenching furnace 22, the bottom wall of which is installed with a positioning chassis 1, the upper surface of the positioning chassis 1 is provided with a positioning groove 2 for the positioning block 3 to be embedded, the surface of the positioning chassis 1 is rotatably connected with a linkage rod 6, the top of the linkage rod 6 is provided with a second square embedding groove 7 for the square embedding block 19 to be embedded, the linkage rod 6 and the auxiliary support block 4 are symmetrically arranged, the linkage rod 6 is flush with the top surface of the auxiliary support block 4, the linkage rod 6 is used in conjunction with the auxiliary support block 4 to support the clamping assembly, so that air can circulate between the clamping assembly located at the lowest point of all clamping assemblies and the positioning block 3.

[0023] A mounting frame 23 is fixedly connected to the bottom end of the carburizing and quenching furnace 22, and a motor 24 is fixedly installed on the surface of the mounting frame 23. The bottom end of the linkage rod 6 movably penetrates the bottom surface of the carburizing and quenching furnace 22, and the motor 24 is used to drive the linkage rod 6 to rotate. Since the rotating rods 13 on the upper and lower clamping assemblies are connected to each other through the upper second T-shaped rotating shaft 20 and the lower first T-shaped rotating shaft 17, and the rotating rod 13 on the clamping assembly located at the lowest point of all clamping assemblies is connected to the linkage rod 6 through the second T-shaped rotating shaft 20, the linkage rod 6 is driven to rotate by starting the motor 24, so that all the rotating rods 13 on the vertical column rotate, thereby realizing the self-rotation of all the annular metal parts on the filling rod 9. By arranging the motor 24 to be located outside the carburizing and quenching furnace 22, away from the internal heat field of the carburizing and quenching furnace 22, it is beneficial to prevent the motor 24 from being damaged by heat.

[0024] Example 2

[0025] Embodiment 2 is based on embodiment 1, the number of filling rods 9 is multiple, and the ring array is arranged on the surface of the positioning block 3, the number of linkage rods 6 is the same as the number of filling rods 9, and the ring array arrangement is the same as the filling rods 9. The lower end of each linkage rod 6 is coaxially fixedly connected to the fourth bevel gear 29, and the bottom end of the carburizing and quenching furnace 22 is fixedly connected to a plurality of suspension rods 30, the number of the suspension rods 30 is the same as the number of the linkage rods 6, and the surface of each suspension rod 30 is rotatably connected to a transmission shaft 27, and one end of the transmission shaft 27 is coaxially fixedly connected to the third The bevel gear 28, the third bevel gear 28 and the fourth bevel gear 29 are meshingly connected, the other end of the transmission shaft 27 is fixedly connected to the second bevel gear 26, the output end of the motor 24 is coaxially fixedly connected to the first bevel gear 25, the first bevel gear 25 and the second bevel gear 26 are meshingly connected, and by providing a plurality of filling rods 9, it is beneficial to increase the number of annular metal parts installed on the hand rack assembly, and by providing a transmission shaft 27, it is beneficial to use one motor 24 to drive all the linkage rods 6 to rotate, which is beneficial to reduce energy consumption and is more environmentally friendly.

[0026] The operation steps of loading the annular metal piece on the portable rack assembly are as follows: first take out the two clamping assemblies, and rotate the top clamping block 14 to make the clamping assembly in a Z shape, and then respectively insert the two clamping assemblies into the T-shaped slide groove 10 on the loading rod 9 through the T-shaped slider 11, and the top clamping block 14 is blocked on the upper surface of the loading rod 9, so that the clamping assembly is suspended at the top position of the loading rod 9, and then the annular metal piece can be put on the two clamping assemblies, so that the bottom clamping block 12 supports the annular metal piece, and then the top clamping block is rotated. Block 14 makes the clamping assembly U-shaped. At this time, the clamping assembly with the annular metal parts freely falls to the bottom along the track of the T-shaped slide groove 10. The first to fall will have a square insert 19 on one of the clamping assemblies embedded in the first square embedding groove 5 on the auxiliary support block 4. The subsequent clamping assemblies that fall and are filled, the two square inserts 19 are respectively embedded in the third square embedding groove 18 on the clamping assembly below to complete the connection, and so on, until the handheld rack assembly is filled with annular metal parts.

[0027] The operating steps for installing the hand-held rack assembly into the carburizing and quenching furnace 22 are as follows: open the carburizing and quenching furnace 22, lift the lifting rod 8, move the hand-held rack assembly, and embed the positioning block 3 into the positioning groove 2. At the same time, the square embedding block 19 on the other clamping assembly at the lower end is embedded into the second square embedding groove 7 on the linkage rod 6 to complete the connection.

[0028] The operation steps of the clamping assembly driving the annular metal part to rotate are as follows: by starting the motor 24, the first bevel gear 25 is driven to rotate, the rotation of the first bevel gear 25 drives the second bevel gear 26 to rotate, the rotation of the second bevel gear 26 drives the transmission shaft 27 to rotate, the rotation of the transmission shaft 27 drives the third bevel gear 28 to rotate, the rotation of the third bevel gear 28 drives the fourth bevel gear 29 to rotate, the rotation of the fourth bevel gear 29 drives the linkage rod 6 to rotate, the rotation of the linkage rod 6 drives the second T-shaped rotating shaft 20 connected thereto to rotate, and the rotation of the second T-shaped rotating shaft 20 causes the rotation The rod 13 and the first T-shaped rotating shaft 17 rotate, and at the same time, the second T-shaped rotating shaft 20, the rotating rod 13, and the first T-shaped rotating shaft 17 connected in sequence rotate together. The rotation of the rotating rod 13 will cause the corresponding annular metal part to rotate, completing the self-rotation of the annular metal part. When the diameter of the annular workpiece is within 100mm-500mm, the rotation speed of the linkage rod 6 is controlled to be 10rpm-60rpm. When the diameter of the annular workpiece is within 500mm-1000mm, the rotation speed of the linkage rod 6 is controlled to be 2rpm-10rpm.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-toughness carburizing and quenching processing auxiliary device for metal materials, comprising a hand-held frame assembly and a clamping assembly, characterized in that: The clamping assembly comprises a bottom clamping block (12), a rotating rod (13) and a top clamping block (14); the bottom clamping block (12) is rotatably connected to the bottom end of the rotating rod (13); the top clamping block (14) is rotatably connected to the top end of the rotating rod (13); a T-shaped slider (11) is fixedly connected to the side of the bottom clamping block (12); the handcarrying rack assembly comprises a filling rod (9); a surface of the filling rod (9) is vertically provided with a plurality of T-shaped slide grooves (10) arranged in a circular array; the T-shaped slide grooves (10) cooperate with the T-shaped slider (11) to slide up and down.

2. The high-toughness carburizing and quenching processing auxiliary device for metal materials according to claim 1 is characterized in that: The top end of the rotating rod (13) is fixedly connected to a first T-shaped rotating shaft (17), the top clamping block (14) is matched with a first T-shaped circular groove for rotationally connecting the first T-shaped rotating shaft (17), the bottom end of the rotating rod (13) is fixedly connected to a second T-shaped rotating shaft (20), the bottom clamping block (12) is matched with a second T-shaped circular groove for rotationally connecting the second T-shaped rotating shaft (20), the bottom end of the second T-shaped rotating shaft (20) is fixedly connected to a square insert (19), the top end of the top clamping block (14) is matched with a docking hole (21) for embedding the second T-shaped rotating shaft (20), and the top end of the first T-shaped rotating shaft (17) is matched with a third square insert groove (18) for embedding the square insert (19).

3. The high-toughness carburizing and quenching processing auxiliary device for metal materials according to claim 2 is characterized in that: The hand-held rack assembly further comprises a lifting rod (8) and a positioning block (3), wherein the lifting rod (8) is fixedly connected to the top of the positioning block (3), the filling rod (9) is fixedly connected to the top surface of the positioning block (3), the top of the positioning block (3) is rotatably connected to an auxiliary support block (4), and the top of the auxiliary support block (4) is provided with a first square embedding groove (5) for embedding a square embedding block (19).

4. The high-toughness carburizing and quenching processing auxiliary device for metal materials according to claim 3 is characterized in that: It also includes a carburizing and quenching furnace (22), the bottom wall of which is mounted a positioning chassis (1), the upper surface of which is provided with a positioning groove (2) for a positioning block (3) to be embedded, a linkage rod (6) rotatably connected to the surface of the positioning chassis (1), the top of which is provided with a second square embedding groove (7) for a square embedding block (19) to be embedded, the linkage rod (6) and the auxiliary support block (4) being symmetrically arranged, and the linkage rod (6) is flush with the top surface of the auxiliary support block (4).

5. The high-toughness carburizing and quenching processing auxiliary device for metal materials according to claim 4, characterized in that: The bottom end of the carburizing and quenching furnace (22) is fixedly connected to a mounting frame (23), a motor (24) is fixedly mounted on the surface of the mounting frame (23), the bottom end of the linkage rod (6) movably penetrates the bottom surface of the carburizing and quenching furnace (22), and the motor (24) is used to drive the linkage rod (6) to rotate.

6. A high-toughness carburizing and quenching method for metal materials, characterized in that: The auxiliary device according to claim 1 is used, and the specific steps are as follows: A. Take out a clamping assembly and rotate the top clamping block (14) to make the clamping assembly in a Z shape, then insert the T-shaped slider (11) into the T-shaped slot (10), then insert the T-shaped sliders (11) into the remaining T-shaped slots (10) in sequence, and finally put the annular metal piece on the clamping assembly so that the bottom clamping block (12) supports the annular metal piece, and then rotate the top clamping block (14) to make the clamping assembly in a U shape; B. The clamping assembly slides down to the bottom with the annular metal piece, and the square insert (19) on one of the clamping assemblies that falls first is embedded in the first square embedding groove (5) on the auxiliary support block (4), and the square insert (19) on the clamping assembly that is subsequently filled and dropped is correspondingly embedded in the third square embedding groove (18) on the lower clamping assembly to complete the connection, and so on, until the hand-held rack assembly is filled with the annular metal piece; C. Open the carburizing and quenching furnace (22), lift the lifting rod (8), move the lifting frame assembly, and make the positioning block (3) fit into the positioning groove (2). At the same time, the square insert block (19) on the other clamping assembly at the bottom is inserted into the second square insert groove (7) on the linkage rod (6), and the connection is completed; D. starting the carburizing and quenching furnace (22) to carburize and heat the annular metal piece in the carburizing and quenching furnace (22), and simultaneously starting the motor (24) to drive the linkage rod (6) to rotate, the rotation of the linkage rod (6) drives the rotating rod (13) to rotate, and the rotation of the rotating rod (13) drives the annular metal piece to rotate; E. The carburizing and quenching furnace (22) is closed to stop carburizing, and then the portable rack assembly is taken out, and the annular metal parts on the portable rack assembly are cooled to complete quenching.

7. The high-toughness carburizing and quenching method for metal materials according to claim 6, characterized in that: The diameter of the annular workpiece is between 100 mm and 500 mm, and the rotation speed of the linkage rod (6) is between 10 rpm and 60 rpm.

8. The high toughness carburizing and quenching method for metal materials according to claim 6, characterized in that: The diameter of the annular workpiece is between 500 mm and 1000 mm, and the rotation speed of the linkage rod (6) is between 2 rpm and 10 rpm.

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