An auxiliary device and processing method for high-toughness carburizing and quenching of metal materials

Abstract

The present invention relates to the technical field of quenching processing, and specifically relates to an auxiliary device and processing method for high-toughness carburizing quenching of metal materials, including a hand-held 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, and the top clamping block is rotatably connected to the top end of the rotating rod. A T-shaped slider is fixedly connected to the side surface of the bottom clamping block. The hand-held frame assembly includes a filling rod, and a plurality of T-shaped sliding grooves arranged in a circumferential array are vertically formed on the surface of the filling rod. The T-shaped sliding grooves are cooperatively provided for the T-shaped slider to slide up and down. A first T-shaped rotating shaft is fixedly connected to the top end of the rotating rod. The purpose of the present invention is to solve the problem that the surface of the workpiece facing the gas release port of the furnace wall and the opposite surface thereof are far from the gas release port, resulting in a higher carburizing gas concentration on one side of the workpiece than on the back side, making the carburizing of the workpiece somewhat uneven.

Description

Technical Field

[0001] The present invention relates to the technical field of quenching processing, and particularly to an auxiliary device and processing method for high-toughness carburizing quenching processing of metal materials. Background Technique

[0002] Carburizing quenching can make the surface of the carburized workpiece obtain very high hardness and improve its wear resistance. Carburizing refers to the process of infiltrating carbon atoms into the surface layer of steel, and also making the workpiece of low-carbon steel have a surface layer of high-carbon steel. After quenching, the surface layer of the workpiece has high hardness and wear resistance, while the central part of the workpiece still retains the toughness and plasticity of low-carbon steel. In actual production, there are many carburizing methods, which can be divided into solid carburizing, liquid carburizing and gas carburizing according to the different states of the medium. 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 carburizing are annular workpieces, such as gears, bearings, etc., and the demand is relatively large.

[0003] The gas release ports of the existing carburizing quenching furnaces are usually distributed on the four walls of the furnace. Distributing the gas release ports around the furnace chamber can make the gas transfer to the workpiece evenly from all four sides compared with installing them on the top or bottom of the furnace, which helps to reduce the non-uniformity of the gas concentration in the furnace and ensure the uniformity of workpiece carburizing. However, even so, for a single workpiece, the side facing the gas release port on the furnace wall is farther from the gas release port than the opposite side, resulting in a higher carburizing gas concentration on one side of the workpiece than the opposite side, and the carburizing of the workpiece is still somewhat uneven. Summary of the Invention

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

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An auxiliary device for high-toughness carburizing quenching processing of metal materials includes a hand-held 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, and the top clamping block is rotatably connected to the top end of the rotating rod. A T-shaped slider is fixedly connected to the side surface of the bottom clamping block. The hand-held frame assembly includes a filling rod, and a plurality of T-shaped sliding grooves arranged in a circular array are vertically opened on the surface of the filling rod. The T-shaped sliding grooves are cooperatively connected for the T-shaped slider to slide up and down.

[0007] Preferably, a first T-shaped rotating shaft is fixedly connected to the top end of the rotating rod, and the top clamping block is provided with a first T-shaped circular groove for the first T-shaped rotating shaft to be rotatably connected. A second T-shaped rotating shaft is fixedly connected to the bottom end of the rotating rod, and the bottom clamping block is provided with a second T-shaped circular groove for the second T-shaped rotating shaft to be rotatably connected. A square embedding block is fixedly connected to the bottom end of the second T-shaped rotating shaft. A docking hole for the second T-shaped rotating shaft to be embedded is formed in the top end of the top clamping block in a matching manner. A third square embedding groove for the square embedding block to be embedded is formed in the top end of the first T-shaped rotating shaft in a matching manner.

[0008] Preferably, the hand-held frame assembly further includes a lifting rod and a positioning block. The lifting rod is fixedly connected to the top of the positioning block. The filling rod is fixedly connected to the top surface of the positioning block. An auxiliary support block is rotatably connected to the top of the positioning block. A first square embedding groove for the square embedding block to be embedded is formed in the top of the auxiliary support block in a matching manner.

[0009] Preferably, a carburizing and quenching furnace is further included. A positioning chassis is installed on the bottom wall of the carburizing and quenching furnace. A positioning groove for the positioning block to be embedded is formed in the upper surface of the positioning chassis in a matching manner. A linkage rod is rotatably connected to the surface of the positioning chassis. A second square embedding groove for the square embedding block to be embedded is formed in the top of the linkage rod in a matching manner. The linkage rod and the auxiliary support block are arranged symmetrically, and the top surfaces of the linkage rod and the auxiliary support block are flush.

[0010] Preferably, an installation frame is fixedly connected to the bottom end of the carburizing and quenching furnace. A motor is fixedly installed on the surface of the installation frame. The bottom end of the linkage rod movably penetrates through the bottom surface of the carburizing and quenching furnace, and the motor is used to drive the linkage rod to rotate.

[0011] A high-toughness carburizing and quenching processing method for metal materials is carried out by using the auxiliary device, and the specific steps are as follows:

[0012] A. Take out a clamping component and rotate the top clamping block to make the clamping component in a Z shape. Then embed the T-shaped slider into the T-shaped sliding groove, and then sequentially embed the T-shaped sliders into the remaining T-shaped sliding grooves. Finally, put the circular metal piece on the clamping component, make the bottom clamping block support the circular metal piece, and then rotate the top clamping block to make the clamping component in a U shape;

[0013] B. The clamping component with the circular metal piece slides to the bottom. The square embedding block on one of the clamping components that falls first is embedded into the first square embedding groove on the auxiliary support block. The square embedding blocks on the subsequent filling and falling clamping components are correspondingly embedded into the third square embedding grooves on the lower clamping components to complete the connection. And so on until the hand-held frame assembly is filled with circular metal pieces;

[0014] C. Open the carburizing and quenching furnace, hold the lifting rod by hand, move the hand-held frame assembly, and make the positioning block embed into the positioning groove. At the same time, the square insert block on another clamping assembly at the lowermost end embeds into the second square groove on the linkage rod to complete the connection;

[0015] D. Start the carburizing and quenching furnace to carry out carburizing heating on the annular metal part in the carburizing and quenching furnace. At the same time, start the motor to drive the linkage rod to rotate. The rotation of the linkage rod drives the rotating rod to rotate, and the rotation of the rotating rod drives the annular metal part to rotate self - rotatably;

[0016] E. Close the carburizing and quenching furnace to stop carburizing, then take out the hand-held frame assembly, and cool the annular metal part on the hand-held frame assembly to complete quenching.

[0017] 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.

[0018] Preferably, the diameter of the annular workpiece is between 500 mm and 1000 mm, and the rotation speed of the linkage rod is between 2 rpm and 10 rpm.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. By placing the annular metal part between the bottom clamping block and the top clamping block, the annular metal part can be clamped. The rotating rod contacts the inner ring of the annular metal part. By rotating the rotating rod, the annular metal part can rotate self - rotatably, which is beneficial to making each part on the side of the annular metal part periodically approach the gas release port, ensuring that the concentration of carburizing gas at each part on the side of the annular metal part is relatively uniform;

[0021] 2. By the rotation of the rotating rod, the annular metal part rotates self - rotatably, making the contact parts of the rotating rod, the first ball, the second ball and the annular metal part change periodically, which is beneficial to preventing the clamping part where the clamping assembly contacts the annular metal part from remaining unchanged, resulting in the uneven carburizing of the clamping part on the surface of the annular metal part;

[0022] 3. By connecting the upper and lower adjacent rotating rods to each other, when starting the motor to drive the linkage rod to rotate, all the rotating rods in this vertical column rotate. By setting the motor outside the carburizing and quenching furnace, away from the thermal field inside the carburizing and quenching furnace, it is beneficial to prevent the situation that the motor is damaged due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the auxiliary device of the present invention;

[0024] Figure 2 is a schematic structural diagram of the positioning chassis of the present invention;

[0025] Figure 3 The enlarged view of part A in the present invention Figure 2 ;

[0026] Figure 4 The structural schematic diagram of the portable rack assembly of the present invention

[0027] Figure 5 The present invention Figure 4 The enlarged view of part B in the present invention

[0028] Figure 6 The structural schematic diagram of the clamping assembly of the present invention

[0029] Figure 7 The structural schematic diagram of the vertical section of the bottom clamping block and the top clamping block of the present invention

[0030] Figure 8 The state effect diagram of clamping the metal part of the present invention

[0031] Figure 9 The structural schematic diagram of the carburizing and quenching furnace of the present invention

[0032] Figure 10 The structural schematic diagram of the vertical section of the carburizing and quenching furnace and the positioning chassis of the present invention

[0033] Figure 11 The present invention Figure 10 The enlarged view of part C in the present invention

[0034] In the figure: 1. positioning chassis; 2. positioning groove; 3. positioning block; 4. auxiliary support block; 5. first square embedding groove; 6. linkage rod; 7. second square embedding groove; 8. lifting rod; 9. filling rod; 10. T-shaped sliding groove; 11. T-shaped sliding block; 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 embedding groove; 19. square embedding 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 rod; 28. third bevel gear; 29. fourth bevel gear; 30. suspension rod Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention

[0036] Embodiment 1

[0037] Please refer toFigures 1 to 11 , the present invention provides a technical solution.

[0038] An auxiliary device for high-toughness carburizing and quenching processing of metal materials, comprising a portable 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, and 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 surface of the bottom clamping block 12. The portable frame assembly includes a filling rod 9. A plurality of T-shaped chutes 10 arranged in a circular array are vertically formed on the surface of the filling rod 9. The T-shaped chutes 10 are configured to cooperate with the T-shaped slider 11 for vertical sliding connection. By inserting the T-shaped slider 11 into the T-shaped chute 10, the clamping assembly can move up and down along the track of the T-shaped chute 10, which is beneficial to conveniently installing multiple clamping assemblies from bottom to top in the same T-shaped chute 10. When installing the clamping assembly on the filling rod 9, at least two T-shaped chutes 10 are filled with the clamping assembly to ensure the stability of the installation of the metal part and the uniformity of the force, and ensure that the filled clamping assemblies also maintain a circular array arrangement. For example, please refer to Figure 1 , the number of T-shaped chutes 10 formed on the filling rod 9 is six and they are arranged in a circular array. Two T-shaped chutes 10 are filled with the clamping assembly. Select two T-shaped chutes 10, one on the left and one on the right, so that the filled clamping assemblies also maintain a circular array arrangement;

[0039] Please refer to Figure 8 , by placing the circular metal part between the bottom clamping block 12 and the top clamping block 14, the circular metal part can be clamped. The rotating rod 13 contacts the inner ring of the circular metal part. By rotating the rotating rod 13, the circular metal part can be rotated, which is beneficial to making each part of the side surface of the circular metal part periodically approach the gas release port, ensuring that the concentration of carburizing gas at each part of the side surface of the circular metal part is relatively uniform.

[0040] A first T-shaped rotating shaft 17 is fixedly connected to the top end of the rotating rod 13. The top clamping block 14 is provided with a first T-shaped circular groove for the first T-shaped rotating shaft 17 to be rotatably connected. A second T-shaped rotating shaft 20 is fixedly connected to the bottom end of the rotating rod 13. The bottom clamping block 12 is provided with a second T-shaped circular groove for the second T-shaped rotating shaft 20 to be rotatably connected. A square insert block 19 is fixedly connected to the bottom end of the second T-shaped rotating shaft 20. A docking hole 21 for the second T-shaped rotating shaft 20 to be inserted is formed at the top end of the top clamping block 14. A third square insert groove 18 for the square insert block 19 to be inserted is formed at the top end of the first T-shaped rotating shaft 17. The length and width of the square insert block 19 are smaller than the diameter of the second T-shaped rotating shaft 20, ensuring that when the second T-shaped rotating shaft 20 is inserted into the docking hole 21, the square insert block 19 can also pass through. By setting the second T-shaped rotating shaft 20 to be interconnected with the first T-shaped rotating shaft 17, the upper and lower clamping assemblies can be interconnected, enabling the rotation of the rotating rod 13 on one clamping assembly, and the rotating rod 13 on the interconnected clamping assembly to follow the rotation, which is beneficial for reducing the energy setting and achieving energy conservation. The bottom end of the second T-shaped rotating shaft 20 penetrates the bottom surface of the bottom clamping block 12. By setting the bottom end of the second T-shaped rotating shaft 20 to penetrate the bottom surface of the bottom clamping block 12, it is beneficial to keep a distance equal to the length that the second T-shaped rotating shaft 20 extends from the bottom surface of the bottom clamping block 12 between the upper and lower clamping assemblies, which is beneficial for ensuring the air circulation between the upper and lower circular metal parts during the carburizing and heating process in the carburizing quenching furnace 22. A first ball 15 is rotatably connected to the bottom end of the top clamping block 14, and a second ball 16 is rotatably connected to the top end of the bottom clamping block 12. When placing the circular metal part between the bottom clamping block 12 and the top clamping block 14, the first ball 15, the second ball 16 contact the surface of the circular metal part, which is beneficial for the contact between the clamping assembly and the circular metal part to be point contact, exposing more surface area of the circular metal part and reducing the carburizing dead angle area. And by rotating the rotating rod 13, the circular metal part rotates, causing the contact parts between the rotating rod 13, the first ball 15, the second ball 16 and the circular metal part to change periodically, which is beneficial for preventing the situation where the clamping parts where the clamping assembly contacts the circular metal part remain unchanged, resulting in uneven carburizing on the surface clamping parts of the circular metal part.

[0041] The hand-held frame assembly further 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. The filling rod 9 is fixedly connected to the top surface of the positioning block 3. An auxiliary support block 4 is rotatably connected to the top of the positioning block 3. A first square insert groove 5 for the square insert block 19 to be inserted is formed at the top of the auxiliary support block 4. By setting the auxiliary support block 4, it is beneficial to keep a corresponding length of distance between the clamping assembly at the lowest position among all clamping assemblies and the positioning block 3, which is beneficial for ensuring the air circulation between the clamping assembly at the lowest position among all clamping assemblies and the positioning block 3 during the carburizing and heating process in the carburizing quenching furnace 22.

[0042] It further includes a carburizing and quenching furnace 22. A positioning chassis 1 is installed on the bottom wall of the carburizing and quenching furnace 22. A positioning groove 2 for the positioning block 3 to be embedded is cooperatively opened on the upper surface of the positioning chassis 1. A linkage rod 6 is rotatably connected to the surface of the positioning chassis 1. A second square groove 7 for the square insert 19 to be embedded is cooperatively opened at the top of the linkage rod 6. The linkage rod 6 and the auxiliary support block 4 are arranged symmetrically, and the top surfaces of the linkage rod 6 and the auxiliary support block 4 are flush. The linkage rod 6 is used to support the clamping components in cooperation with the auxiliary support block 4, so that the air can circulate between the clamping component at the lowest position of all the clamping components and the positioning block 3.

[0043] A mounting frame 23 is fixedly connected to the bottom end of the carburizing and quenching furnace 22. 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. The motor 24 is used to drive the linkage rod 6 to rotate. Since the rotating rods 13 on the upper and lower clamping components 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 component at the lowest position of all the clamping components is connected to the linkage rod 6 through the second T-shaped rotating shaft 20, by starting the motor 24 to drive the linkage rod 6 to rotate, all the rotating rods 13 on this vertical column can be rotated, so as to realize the self-rotation of all the annular metal parts on the filling rod 9. By arranging the motor 24 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.

[0044] Embodiment 2

[0045] On the basis of Embodiment 1, the number of filling rods 9 is multiple, and they are arranged in an annular array 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 they are arranged in the same annular array as the filling rods 9. A fourth bevel gear 29 is coaxially and fixedly connected to the lower end of each linkage rod 6. A plurality of suspension rods 30 are fixedly connected to the bottom end of the carburizing and quenching furnace 22. The number of suspension rods 30 is the same as the number of linkage rods 6. A transmission shaft rod 27 is rotatably connected to the surface of each suspension rod 30. A third bevel gear 28 is coaxially and fixedly connected to one end of the transmission shaft rod 27. The third bevel gear 28 and the fourth bevel gear 29 are meshed. A second bevel gear 26 is fixedly connected to the other end of the transmission shaft rod 27. A first bevel gear 25 is coaxially and fixedly connected to the output end of the motor 24. The first bevel gear 25 and the second bevel gear 26 are meshed. By arranging a plurality of filling rods 9, it is beneficial to increase the number of annular metal parts installed on the hand-held frame assembly. By arranging the transmission shaft rod 27, it is beneficial to enable all the linkage rods 6 to be rotated by using one motor 24, which is beneficial to reducing energy consumption and being more environmentally friendly.

[0046] Operation steps for loading the ring-shaped metal parts on the portable rack assembly: First, take out two clamping assemblies and rotate the top clamping block 14 to make the clamping assemblies in a Z shape. Then, respectively insert the two clamping assemblies into the T-shaped sliding grooves 10 on the loading rod 9 through the T-shaped sliding blocks 11. The top clamping block 14 blocks the upper surface of the loading rod 9, so that the clamping assemblies are suspended at the top of the loading rod 9. Then, the ring-shaped metal parts can be sleeved on the two clamping assemblies, and the bottom clamping block 12 supports the ring-shaped metal parts. Then, rotate the top clamping block 14 again to make the clamping assemblies in a U shape. At this time, the clamping assemblies carry the ring-shaped metal parts and freely fall to the bottom along the track of the T-shaped sliding groove 10. The first to fall will be that the square insert block 19 on one of the clamping assemblies is inserted into the first square insert groove 5 on the auxiliary support block 4. For the subsequent clamping assemblies that fall and are loaded, the two square insert blocks 19 are respectively inserted into the third square insert grooves 18 on the lower clamping assembly to complete the connection. And so on until the portable rack assembly is fully loaded with ring-shaped metal parts.

[0047] Operation steps for installing the portable rack assembly into the carburizing and quenching furnace 22: Open the carburizing and quenching furnace 22, lift the lifting rod 8, move the portable rack assembly, and make the positioning block 3 inserted into the positioning groove 2. At the same time, the square insert block 19 on the other clamping assembly at the lowermost end is inserted into the second square insert groove 7 on the linkage rod 6 to complete the connection.

[0048] Operation steps for the clamping assembly to drive the ring-shaped metal parts to rotate: 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 rod 27 to rotate. The rotation of the transmission shaft rod 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 to it to rotate. The rotation of the second T-shaped rotating shaft 20 will cause the rotating rod 13 and the first T-shaped rotating shaft 17 to rotate. At the same time, the second T-shaped rotating shaft 20, the rotating rod 13, and the first T-shaped rotating shaft 17 that are connected in sequence will rotate together. The rotation of the rotating rod 13 will cause the corresponding ring-shaped metal parts to rotate, completing the rotation of the ring-shaped metal parts. When the diameter of the ring-shaped workpiece is within 100 mm - 500 mm, control the rotation speed of the linkage rod 6 at 10 rpm - 60 rpm. When the diameter of the ring-shaped workpiece is within 500 mm - 1000 mm, control the rotation speed of the linkage rod 6 at 2 rpm - 10 rpm.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. 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 carrying frame assembly and a clamping assembly, characterized in that: The clamping assembly includes a bottom clamping block (12), a rotating rod (13) and a top clamping block (14), wherein the bottom clamping block (12) is rotatably connected to the bottom end of the rotating rod (13), and 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 handheld rack assembly includes a filling rod (9), and a surface of the filling rod (9) is vertically provided with a plurality of T-shaped slide grooves (10) arranged in a circular array, and the T-shaped slide grooves (10) cooperate with the T-shaped slider (11) to slide up and down. The top end of the rotating rod (13) is fixedly connected to a 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 end of the second T-shaped rotating shaft (20) is fixedly connected to a square insert (19); The top end of the first T-shaped rotating shaft (17) is provided with a third-shaped embedding groove (18) for embedding a square embedding block (19); The top clamping block (14) is provided with a first T-shaped circular groove for rotationally connecting the first T-shaped rotating shaft (17), the bottom clamping block (12) is provided with a second T-shaped circular groove for rotationally connecting the second T-shaped rotating shaft (20), and the top end of the top clamping block (14) is provided with a docking hole (21) for embedding the second T-shaped rotating shaft (20); The bottom end of the second T-shaped rotating shaft (20) penetrates the bottom surface of the bottom clamping block (12).

2. The high-toughness carburizing and quenching processing auxiliary device for metal materials according to claim 1, 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), 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), 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).

3. The high-toughness carburizing and quenching processing auxiliary device for metal materials according to claim 2, 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 the positioning block (3) to be embedded, the surface of which is rotatably connected to a linkage rod (6), the top of which 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) being symmetrically arranged, and the linkage rod (6) is flush with the top surface of the auxiliary support block (4).

4. The high-toughness carburizing and quenching processing auxiliary device for metal materials according to claim 3, characterized in that: The bottom end of the carburizing and quenching furnace (22) is fixedly connected to a mounting frame (23), and 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.

5. A high-toughness carburizing and quenching method for metal materials, characterized in that: The auxiliary device according to claim 4 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 Z-shaped, then insert the T-shaped slider (11) into the T-shaped slot (10), and 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 U-shaped; 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 subsequent clamping assembly that falls is correspondingly embedded in the third square embedding groove (18) on the lower clamping assembly to complete the connection, and so on, until the handheld rack assembly is filled with the annular metal piece; C. Open the carburizing and quenching furnace (22), lift the lifting lever (8), and move the lifting frame assembly so that the positioning block (3) is embedded in the positioning groove (2). At the same time, the square insert (19) on the other clamping assembly at the bottom is embedded in the second square insert groove (7) on the linkage rod (6), completing the connection; D. Start the carburizing and quenching furnace (22) to carburize and heat the annular metal piece in the carburizing and quenching furnace (22), and simultaneously start the motor (24) to drive the linkage rod (6) to rotate, the linkage rod (6) rotates to drive the rotating rod (13) to rotate, and the rotating rod (13) rotates to drive the annular metal piece to rotate; E. Close the carburizing and quenching furnace (22) to stop carburizing, then remove the portable rack assembly, cool the annular metal parts on the portable rack assembly, and complete the quenching.

6. The high toughness carburizing and quenching method for metal materials according to claim 5, 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.

7. The high toughness carburizing and quenching method for metal materials according to claim 5, characterized in that: The diameter of the annular workpiece is 500 mm to 1000 mm, and the rotation speed of the linkage rod (6) is 2 rpm to 10 rpm.

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