Automobile half shaft heat treatment processing device and processing method thereof

Abstract

The application relates to the technical field of automobile half shaft heat treatment, and discloses an automobile half shaft heat treatment processing device and a processing method thereof, which comprise a cooling part, the inside of the cooling part is staggered with a plurality of first cooling areas and a plurality of second cooling areas; a cooling medium providing part is used for providing a gaseous cooling medium to the first cooling areas and a liquid cooling medium to the second cooling areas; and a conveying and clamping part is provided with a plurality of half shafts clamped thereon and is used for sequentially making the half shafts pass through the first cooling areas for precooling and then pass through the second cooling areas for accelerated cooling. The half shafts can be precooled in the first cooling areas, that is, slowly cooled, and when the temperature is cooled to a set temperature, the half shafts are moved into the second cooling areas for accelerated cooling, so that the half shafts can be effectively prevented from being deformed due to the large temperature difference between the surface and the core of the half shafts, the superposition of thermal stress and organizational stress and the like caused by too fast cooling, the heat treatment quality of the half shafts is improved, and defects are reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive half-shaft heat treatment technology, and more specifically, to an automotive half-shaft heat treatment processing apparatus and method. Background Technology

[0002] Heat treatment of automotive half-shafts is a crucial process in automobile manufacturing, essential for improving their hardness, strength, toughness, and wear resistance. Typical heat treatment processes for automotive half-shafts include normalizing, quenching, tempering, straightening, and shot blasting. Among these, quenching significantly enhances the hardness and strength of the half-shaft.

[0003] In the prior art, when the heated half shaft is quenched, it is prone to deformation, which affects the assembly accuracy. This is because when the heated half shaft is rapidly cooled, the temperature difference between the surface and the core of the half shaft is large, and the thermal stress and structural stress are superimposed, resulting in deformation.

[0004] Therefore, it is necessary to propose a heat treatment processing device and method for automobile half-shafts to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides a heat treatment processing apparatus for automotive half-shafts, comprising:

[0007] The cooling section has multiple first cooling zones and multiple second cooling zones arranged in an alternating pattern inside.

[0008] A cooling medium supply unit is used to supply gaseous cooling medium to a first cooling zone and liquid cooling medium to a second cooling zone;

[0009] The conveying clamping part holds multiple half shafts, which are used to pre-cool the half shafts in the first cooling zone and then accelerate their cooling in the second cooling zone.

[0010] Preferably, the cooling section is provided with an annular receiving groove, which is divided into multiple first cooling areas and multiple second cooling areas by multiple partition plates, and the partition plates are provided with openings that allow the half shaft to pass through.

[0011] Within the first cooling area, first nozzles are arranged on both the outer and inner ring walls of the annular receiving groove;

[0012] Within the second cooling region, second nozzles are arranged on both the outer and inner ring walls of the annular receiving groove.

[0013] Preferably, the outer ring wall is provided with a plurality of first outer cavities communicating with the first nozzle and a plurality of second outer cavities communicating with the second nozzle, and the inner ring wall is provided with a plurality of first inner cavities communicating with the first nozzle and a plurality of second inner cavities communicating with the second nozzle;

[0014] The bottom of the cooling section is provided with a first connecting cavity for connecting the first outer cavity and the first inner cavity, and a second connecting cavity for connecting the second outer cavity and the second inner cavity.

[0015] Preferably, the cooling section is further provided with an annular air inlet chamber communicating with the first outer cavity and an annular liquid inlet chamber communicating with the second outer cavity. The annular air inlet chamber is respectively connected to the air outlet of the cooling medium supply section and the first outer cavity, and the annular liquid inlet chamber is respectively connected to the liquid outlet of the cooling medium supply section and the second outer cavity.

[0016] Preferably, the second communicating cavity is provided with a conduit for guiding liquid in the second cooling area to the outside.

[0017] Preferably, the cooling medium supply unit includes:

[0018] A support frame with four cylindrical bodies arranged circumferentially on it, and a plug is slidably provided inside the cylindrical body;

[0019] A first check valve and a second check valve are provided at the end of the cylinder. The first check valve is connected to a gas cooling medium or a liquid cooling medium, and the second check valve serves as the gas outlet or liquid outlet of the cooling medium supply section.

[0020] The drive mechanism is connected to the drive body mounted on the support frame. The drive mechanism is connected to four plugs respectively, and is used to make two symmetrically arranged plugs move synchronously.

[0021] Preferably, of the four cylinders, two cylinders are used to provide gaseous cooling medium to the first cooling zone, and the other two cylinders are used to provide liquid cooling medium to the second cooling zone;

[0022] Two symmetrically arranged cylinders are used to provide two different cooling media; or, two symmetrically arranged cylinders are used to provide the same cooling media.

[0023] Preferably, the drive mechanism includes:

[0024] Four hinge rods are hinged to each other at both ends, and the hinge axes of two of the hinge rods are rotatably connected to the plug body.

[0025] Two drive rods are located above and below the four hinge rods respectively, and the centers of the two drive rods are connected to the drive body through a drive shaft;

[0026] The ends of the two drive rods are connected by a fixed shaft. The outer side of the fixed shaft is provided with a first rotating sleeve, and the inner side of the hinge rod is provided with a drive slot corresponding to the first rotating sleeve.

[0027] Preferably, a second rotating sleeve is provided on the outer side of the hinge shaft, and an arc-shaped portion is provided on the drive rod for applying force to the second rotating sleeve.

[0028] A method for heat treatment of automotive half-shafts, comprising:

[0029] The heated half-shaft is conveyed to the first cooling zone of the cooling section using the conveying clamping part;

[0030] Gas cooling medium is supplied to the first cooling zone through the cooling medium supply section, and air is blown evenly onto the surface of the half shaft for pre-cooling.

[0031] After the half shaft is cooled to the set temperature in the first cooling zone, it is transported to the second cooling zone by the conveying clamping part. Liquid cooling medium is provided to the second cooling zone by the cooling medium supply part and sprayed evenly on the surface of the half shaft to accelerate cooling.

[0032] After the half-shaft finishes accelerated cooling in the second cooling zone, it is transported back to the first cooling zone using the conveying clamp and air is blown onto the surface of the half-shaft quickly.

[0033] Compared with the prior art, the present invention has at least the following beneficial effects:

[0034] The automotive half-shaft heat treatment processing device and method described in this invention allow the half-shaft to be pre-cooled in a first cooling zone, i.e., slowly cooled down. When cooled to a set temperature, the half-shaft is moved to a second cooling zone for accelerated cooling. This effectively prevents excessively rapid cooling from causing a large temperature difference between the half-shaft surface and the core, resulting in thermal stress and structural stress superposition and causing half-shaft deformation. This improves the heat treatment quality of the half-shaft and reduces the occurrence of defects.

[0035] The automotive half-shaft heat treatment processing apparatus and method described in this invention, along with other advantages, objectives, and features of this invention, will be partly apparent from the following description and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a schematic diagram of the structure of the automotive half-shaft heat treatment processing device according to the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the automotive half-shaft heat treatment processing device according to the present invention when the half-shaft enters the annular receiving groove;

[0039] Figure 3 This is a top view of the automotive half-shaft in the first cooling zone of the heat treatment processing apparatus for the half-shaft described in this invention.

[0040] Figure 4 This is a schematic diagram of the longitudinal section structure of the cooling section in the first cooling region in the automotive half-shaft heat treatment processing apparatus of the present invention.

[0041] Figure 5 This is a schematic diagram of the cross-sectional structure of the cooling section at the annular air intake cavity in the automotive half-shaft heat treatment processing apparatus of the present invention.

[0042] Figure 6 This is a schematic diagram of the longitudinal section structure of the cooling section in the second cooling region in the automotive half-shaft heat treatment processing apparatus of the present invention.

[0043] Figure 7 This is a schematic diagram of the cross-sectional structure of the cooling section at the annular liquid inlet chamber in the automotive half-shaft heat treatment processing device of the present invention.

[0044] Figure 8 This is a schematic diagram of the cross-sectional structure of the cooling section at the first and second connecting cavities in the automotive half-shaft heat treatment processing apparatus of the present invention.

[0045] Figure 9 This is a schematic diagram of the longitudinal section of the cooling medium supply unit in the automotive half-shaft heat treatment processing apparatus of the present invention;

[0046] Figure 10 This is a schematic diagram of the connection structure between the drive mechanism and the plug body in the automotive half-shaft heat treatment processing device of the present invention;

[0047] Figure 11 This is a schematic diagram of the structure of the automobile half-shaft heat treatment processing device according to the present invention, when the first rotating sleeve enters the drive groove.

[0048] Figure 12 This is a schematic diagram of the structure of the automotive half-shaft heat treatment processing device described in this invention, showing the drive rod spreading out the four hinge rods.

[0049] Figure 13 This is a schematic diagram of the structure of the automotive half-shaft heat treatment processing device according to the present invention when the drive rod rotates 90 degrees. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0051] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0052] like Figures 1-3 As shown, the present invention provides a heat treatment processing apparatus for automotive half-shafts, comprising:

[0053] The cooling section 1 has multiple first cooling zones 11 and multiple second cooling zones 12 arranged in an alternating manner inside;

[0054] The cooling medium supply unit 2 is used to supply gaseous cooling medium to the first cooling zone 11 and liquid cooling medium to the second cooling zone 12;

[0055] The conveying clamping part 3 holds multiple half shafts 6, which are used to pre-cool the half shafts 6 in the first cooling zone 11 and then accelerate their cooling in the second cooling zone 12.

[0056] The conveying and clamping part 3 (not shown in the specific structural diagram) includes a robotic arm and a clamping disk. The clamping disk is equipped with multiple clamping components for clamping the half-shafts 6. The robotic arm can move multiple half-shafts 6 from the heating part to the cooling part 1. The robotic arm can control the clamping disk to rotate along its axis to move the half-shafts 6 within the first cooling area 11 and the second cooling area 12 for sequential cooling. The clamping components can clamp and release the half-shafts 6.

[0057] The clamping disc may also be equipped with a rotary drive assembly for driving the clamping assembly to rotate along the axis of the half shaft 6. When the half shaft 6 is quenched, the rotary drive assembly can drive the half shaft 6 to rotate, so that the cooling medium can be evenly applied to the surface of the half shaft 6, ensuring the quenching quality of the half shaft 6.

[0058] Through the above design, the half-shaft 6 can be pre-cooled in the first cooling zone 11, that is, slowly cooled down. When it is cooled to a set temperature (for example, below the critical temperature of the material of the half-shaft 6), the half-shaft 6 is moved to the second cooling zone 12 for accelerated cooling. This can effectively prevent the temperature difference between the surface and the core of the half-shaft 6 from being too fast, and prevent the deformation of the half-shaft 6 caused by the superposition of thermal stress and structural stress. This improves the heat treatment quality of the half-shaft 6 and reduces the occurrence of defects.

[0059] like Figure 2 and Figure 3In one embodiment, the cooling section 1 is provided with an annular receiving groove, which is divided into a plurality of first cooling regions 11 and a plurality of second cooling regions 12 by a plurality of partition plates 4. The partition plates 4 are provided with openings 41 through which the half shaft 6 can pass.

[0060] Within the first cooling zone 11, first nozzles 14A are arranged on both the outer and inner ring walls of the annular receiving groove.

[0061] Within the second cooling zone 12, second nozzles 14B are arranged on both the outer and inner ring walls of the annular receiving groove.

[0062] like Figure 3 As shown, the first cooling zone 11 is set to 6 units and the second cooling zone 12 is set to 6 units, which are arranged alternately. The actual number can be adjusted according to the situation.

[0063] The partition plate 4 is used to separate the first nozzle 14A on the adjacent first cooling zone 11 and the second nozzle 14B on the second cooling zone 12;

[0064] Multiple half-shafts 6 are first placed in the first cooling zone 11. Then, a gaseous cooling medium, such as filtered air, is supplied to the first nozzle 14A through the cooling medium supply unit 12. Multiple evenly arranged first nozzles 14A simultaneously blow air onto the surface of the half-shafts 6. A low-speed airflow can be used to pre-cool the half-shafts 6 and achieve slow cooling. Then, when the temperature reaches the set temperature, the multiple half-shafts 6 are moved as a whole to the second cooling zone 12. Similarly, a liquid cooling medium, such as water, quenching oil, or water-based quenching liquid, is supplied to the second nozzle 14B through the cooling medium supply unit 12. Multiple evenly arranged second nozzles 14B simultaneously spray the liquid cooling medium onto the surface of the half-shafts 6, so that the half-shafts 6 are cooled quickly and the quenching is completed.

[0065] After quenching, the half shaft 6 can be moved to the first cooling zone 11 again. At this time, gas is supplied to the first nozzle 14A through the cooling medium supply unit 12 and blown to the surface of the half shaft 6 to blow off the liquid and impurities attached to the surface of the half shaft 6, so as to facilitate the next heat treatment of the half shaft 6, such as tempering, and ensure that the surface of the half shaft 6 can be heated or cooled evenly during the heat treatment process.

[0066] like Figures 4-7 As shown, in one embodiment, the outer ring wall is provided with a plurality of first outer cavities 16 communicating with the first nozzle 14A and a plurality of second outer cavities 17 communicating with the second nozzle 14B, and the inner ring wall is provided with a plurality of first inner cavities 18 communicating with the first nozzle 14A and a plurality of second inner cavities 19 communicating with the second nozzle 14B.

[0067] The bottom of the cooling section 1 is provided with a first connecting cavity 13A for connecting the first outer cavity 16 and the first inner cavity 18, and a second connecting cavity 13B for connecting the second outer cavity 17 and the second inner cavity 19.

[0068] Furthermore, pressure sensors can be installed in the first outer cavity 16, the first inner cavity 18, the second outer cavity 17, and the second inner cavity 19 to detect gas or liquid pressure.

[0069] like Figure 4 and Figure 5 As shown, when pre-cooling the half-shaft 6, gaseous cooling medium is introduced into the first outer cavity 16 through the cooling medium supply unit 2, and then the gaseous cooling medium enters the first inner cavity 18 through the first connecting cavity 13A. After the pressure in the first outer cavity 16 and the first inner cavity 18 reaches the first set pressure, the first nozzle 14A is opened to provide a low-speed airflow to the surface of the half-shaft 6 for pre-cooling.

[0070] like Figure 6 and Figure 7 As shown, when accelerating the cooling of the half-shaft 6, liquid cooling medium is introduced into the second outer cavity 17 through the cooling medium supply unit 2, and then the liquid cooling medium enters the second inner cavity 19 through the second connecting cavity 13B. After the pressure in the second outer cavity 17 and the second inner cavity 19 reaches the second set pressure, the second nozzle 14B is opened to spray onto the surface of the half-shaft 6 to accelerate its cooling.

[0071] When removing liquid and impurities from the surface of the half-shaft 6 after accelerated cooling, gaseous cooling medium is introduced into the first outer cavity 16 through the cooling medium supply unit 2. Then, the gaseous cooling medium enters the first inner cavity 18 through the first connecting cavity 13A. After the pressure in the first outer cavity 16 and the first inner cavity 18 reaches the third set pressure, the first nozzle 14A opens to provide high-speed airflow to the surface of the half-shaft 6, quickly cleaning the surface of the half-shaft 6. The third set pressure is greater than the first set pressure.

[0072] like Figures 4-7 As shown, the cooling section 1 is further provided with an annular air inlet chamber 15A communicating with the first outer cavity 16 and an annular liquid inlet chamber 15B communicating with the second outer cavity 17. The annular air inlet chamber 15A is respectively connected to the air outlet of the cooling medium supply section 2 and the first outer cavity 16, and the annular liquid inlet chamber 15B is respectively connected to the liquid outlet of the cooling medium supply section 2 and the second outer cavity 17.

[0073] The outlet of the cooling medium supply unit 2 is connected to the annular air inlet chamber 15A, and the outlet of the cooling medium supply unit 2 is connected to the annular liquid inlet chamber 15B. Gas cooling medium and liquid cooling medium are supplied to the first outer cavity 16 and the second outer cavity 17 of the cooling unit 1, respectively, to ensure the uniformity of the gas cooling medium supplied to each first outer cavity 16 and the uniformity of the liquid cooling medium supplied to each second outer cavity 17. This further ensures that the pre-cooling effect of the multiple first cooling zones 11 on the multiple half shafts 6 is the same, and that the accelerated cooling effect of the multiple second cooling zones 12 on the multiple half shafts 6 is the same, thereby improving the heat treatment effect of the half shafts 6.

[0074] like Figure 6 and Figure 8 As shown, in one embodiment, a conduit 5 is provided in the second communicating cavity 13B, the conduit 5 being used to guide the liquid in the second cooling zone 12 to the outside.

[0075] The second cooling zone 12 sprays the half shaft 6 for cooling. The cooled liquid can be discharged into the waste liquid storage tank through the conduit 5, and the waste liquid can be recycled and reused to achieve the recycling of waste liquid.

[0076] like Figure 9 and Figure 10 As shown, in one embodiment, the cooling medium supply unit 2 includes:

[0077] A support frame 21 has four cylindrical bodies 22 arranged circumferentially on it, and a plug 23 is slidably provided inside the cylindrical body 22;

[0078] A first check valve 24 and a second check valve 25 are provided at the end of the cylinder 22. The first check valve 24 is connected to a gas cooling medium or a liquid cooling medium, and the second check valve 25 serves as the gas outlet or liquid outlet of the cooling medium supply unit 2.

[0079] The drive mechanism 26 is connected to the drive body 27 mounted on the support frame 21. The drive mechanism 26 is connected to four plugs 23 respectively, and is used to make two symmetrically arranged plugs 23 move synchronously.

[0080] The first one-way valve 24 is disposed on the end face of the cylinder 22, and the second one-way valve 25 is disposed on the outer side of the end of the cylinder 22. After the driving body 27 works, it drives the driving mechanism 26 to move, so that a set of symmetrically arranged plugs 23 move closer to each other. Then, the cylinder 22 corresponding to this plug 23 is sucked in by the first one-way valve 24, so that the gas or liquid enters into the cylinder 22. At the same time, the other set of symmetrically arranged plugs 23 moves away from each other, so that the cylinder 22 corresponding to this plug 23 is discharged out by the second one-way valve 25, so that the gas or liquid is provided to the cooling section 1 for cooling the half shaft 6.

[0081] Furthermore, of the four cylinders 22, two cylinders 22 are used to provide gaseous cooling medium to the first cooling zone 11, and the other two cylinders 22 are used to provide liquid cooling medium to the second cooling zone 12.

[0082] The two symmetrically arranged cylinders 22 are used to provide two different cooling media;

[0083] In other words, of the two symmetrically arranged cylinders 22, one is used to provide gaseous cooling medium to the first cooling zone 11, and the other is used to provide liquid cooling medium to the second cooling zone 12;

[0084] Under the above conditions, gaseous cooling medium and liquid cooling medium can be continuously supplied to the annular air inlet chamber 15A and the annular liquid inlet chamber 15B simultaneously. When the first nozzle 14A and the second nozzle 14B are in the open state, they can continuously blow air or spray air onto the half-shaft 6 and maintain the pressure balance in the corresponding chambers, providing stable blowing (low-speed cooling) and spraying pressure. Of course, as mentioned above, the first nozzle 14A and the second nozzle 14B can be controlled to open when the pressure in the corresponding chambers meets the conditions.

[0085] Alternatively, two symmetrically arranged cylinders 22 are used to provide the same cooling medium;

[0086] That is, the two symmetrically arranged cylinders 22 are both used to provide gaseous cooling medium to the first cooling zone 11, and the two symmetrically arranged cylinders 22 are both used to provide liquid cooling medium to the second cooling zone 12;

[0087] In the above situation, if the cylinder 22 corresponding to the first nozzle 14A discharges gas outward through the second one-way valve 25, then the cylinder 22 corresponding to the second nozzle 14B draws liquid inward through the first one-way valve 24. That is, the discharge or intake of gas and liquid is simultaneously in the opposite state. In this way, each time the two symmetrically arranged plugs 23 move away from each other, they can provide more gas or liquid to the first nozzle 14A or the second nozzle 14B.

[0088] For example, when the half-shaft 6 is pre-cooled, it is necessary to blow air at low speed. After the pressure in the first outer cavity 16 and the first inner cavity 18 reaches the first set pressure, the first nozzle 14A is opened, which can make the two plugs 23 corresponding to the first nozzle 14A move away from each other slowly once, providing a low-speed airflow to the surface of the half-shaft 6 for pre-cooling.

[0089] When the half-shaft 6 is being cooled rapidly, after the pressure in the second outer cavity 17 and the second inner cavity 19 reaches the second set pressure, the second nozzle 14B is opened, causing the two corresponding plugs 23 to move away from each other multiple times at a set speed (the movement can be accelerated when the two plugs 23 are close to each other), and spraying water onto the surface of the half-shaft 6.

[0090] When removing liquid and impurities from the surface of the half-shaft 6, after the pressure in the first outer cavity 16 and the first inner cavity 18 reaches the second set pressure, the first nozzle 14A opens, which can cause the two plugs 23 corresponding to the first nozzle 14A to move away from each other quickly once, and quickly blow air onto the surface of the half-shaft 6.

[0091] like Figures 9-13 As shown, in one embodiment, the drive mechanism 26 includes:

[0092] Four hinge rods 261 are hinged to each other at their ends, and the hinge shafts 262 of two hinge rods 261 are rotatably connected to the plug body 23.

[0093] Two drive rods 263 are located above and below the four hinge rods 261, and the centers of the two drive rods 263 are connected to the drive body 27 through the drive shaft 28.

[0094] The ends of the two drive rods 263 are connected by a fixed shaft 264. A first rotating sleeve 265 is provided on the outer side of the fixed shaft 264, and a drive slot 266 corresponding to the first rotating sleeve 265 is provided on the inner side of the hinge rod 261.

[0095] The drive body 27 operates, causing the drive shaft 28 to rotate, and simultaneously causing the two drive rods 263 to rotate clockwise. Figure 10 Rotate to Figure 11 As shown, the first rotating sleeve 265 enters the drive slot 266; the drive rod 263 continues to rotate clockwise, i.e. Figure 12 In the indicated state, the four hinge rods 261 are extended, causing the four plugs 23 to move (one set of symmetrical plugs 23 moves away from each other, while the other set of symmetrical plugs 23 moves closer to each other); the drive rod 263 continues to rotate clockwise until... Figure 13 As shown, the drive rod 23 has rotated 90 degrees. By continuing to rotate in this way, the four plugs 23 can achieve cyclic linear motion.

[0096] The aforementioned drive mechanism 26 has a simple structure and can simultaneously deliver gas cooling medium and liquid cooling medium using the same mechanical drive to achieve the purpose of cooling the half-shaft 6, thus saving costs.

[0097] like Figure 11 As shown, the hinge shaft 262 is further provided with a second rotating sleeve 267 on its outer side, and the drive rod 263 is provided with an arc-shaped portion 268 for applying force to the second rotating sleeve 267.

[0098] Rotate drive lever 263 to Figure 11In the indicated state, the arc-shaped portion 268 can exert a force on the second rotating sleeve 267, thereby assisting in opening the hinge rod 261, and the second rotating sleeve 267 and the arc-shaped portion 268 roll against each other, which can reduce the wear of both.

[0099] The present invention also provides a method for heat treatment of automotive half-shafts, comprising:

[0100] The heated half-shaft 6 is conveyed to the first cooling zone 11 of the cooling section 1 using the conveying clamping part 3;

[0101] Gas cooling medium is supplied to the first cooling zone 11 by the cooling medium supply unit 2, and air is blown evenly onto the surface of the half shaft 6 for pre-cooling;

[0102] After the half-shaft 6 is cooled to the set temperature in the first cooling zone 11, the half-shaft 6 is transported to the second cooling zone 12 by the conveying clamping part 3. The cooling medium supply part 2 provides liquid cooling medium to the second cooling zone 12 and sprays it evenly onto the surface of the half-shaft 6 to accelerate cooling.

[0103] After the half-shaft 6 finishes accelerated cooling in the second cooling zone 12, the half-shaft 6 is transported back to the first cooling zone 11 by the conveying clamping part 3, and air is quickly blown onto the surface of the half-shaft 6.

[0104] The half-shaft 6 can be pre-cooled in the first cooling zone 11, i.e., slowly cooled down. When it is cooled to a set temperature (e.g., below the critical temperature of the half-shaft 6 material), the half-shaft 6 is moved to the second cooling zone 12 for accelerated cooling. This can effectively prevent the half-shaft 6 from deforming due to excessively rapid cooling and large temperature difference between the surface and core of the half-shaft 6, which would result in thermal stress and structural stress superimposed on the half-shaft 6. This improves the heat treatment quality of the half-shaft 6 and reduces the occurrence of defects. After the half-shaft 6 is cooled, it can continue to move to the first cooling zone 11, where air is quickly blown onto the surface of the half-shaft 6 to remove liquid and impurities, preparing it for subsequent heat treatment and improving the efficiency and quality of heat treatment.

[0105] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0106] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0107] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A heat treatment processing device for automobile half-shafts, characterized in that, include: The cooling section (1) has multiple first cooling zones (11) and multiple second cooling zones (12) arranged alternately inside it; The cooling medium supply unit (2) is used to supply gaseous cooling medium to the first cooling zone (11) and liquid cooling medium to the second cooling zone (12); The conveying clamping part (3) clamps a plurality of half shafts (6) to allow the half shafts (6) to pass through the first cooling zone (11) for pre-cooling and then through the second cooling zone (12) for accelerated cooling. The cooling medium supply unit (2) includes: A support frame (21) has four cylinders (22) arranged circumferentially on it, and a plug (23) is slidably provided inside the cylinders (22); A first check valve (24) and a second check valve (25) are provided at the end of the cylinder (22). The first check valve (24) is connected to the gas cooling medium or the liquid cooling medium, and the second check valve (25) serves as the gas outlet or liquid outlet of the cooling medium supply unit (2). The drive mechanism (26) is connected to the drive body (27) set on the support frame (21). The drive mechanism (26) is connected to four plugs (23) respectively, and is used to make two symmetrically arranged plugs (23) move synchronously.

2. The automotive half-shaft heat treatment processing apparatus according to claim 1, characterized in that, The cooling section (1) is provided with an annular receiving groove, which is divided into multiple first cooling areas (11) and multiple second cooling areas (12) by multiple partition plates (4). The partition plates (4) are provided with openings (41) that allow the half shaft (6) to pass through. Within the first cooling zone (11), first nozzles (14A) are arranged on both the outer and inner ring walls of the annular receiving groove; Within the second cooling zone (12), a second nozzle (14B) is arranged on both the outer and inner ring walls of the annular receiving groove.

3. The automotive half-shaft heat treatment processing apparatus according to claim 2, characterized in that, The outer ring wall is provided with a plurality of first outer cavities (16) communicating with the first nozzle (14A) and a plurality of second outer cavities (17) communicating with the second nozzle (14B). The inner ring wall is provided with a plurality of first inner cavities (18) communicating with the first nozzle (14A) and a plurality of second inner cavities (19) communicating with the second nozzle (14B). The bottom of the cooling section (1) is provided with a first connecting cavity (13A) for connecting the first outer cavity (16) and the first inner cavity (18), and a second connecting cavity (13B) for connecting the second outer cavity (17) and the second inner cavity (19).

4. The automotive half-shaft heat treatment processing apparatus according to claim 3, characterized in that, The cooling section (1) is also provided with an annular air inlet chamber (15A) communicating with the first outer cavity (16) and an annular liquid inlet chamber (15B) communicating with the second outer cavity (17). The annular air inlet chamber (15A) is connected to the air outlet of the cooling medium supply section (2) and the first outer cavity (16), respectively. The annular liquid inlet chamber (15B) is connected to the liquid outlet of the cooling medium supply section (2) and the second outer cavity (17), respectively.

5. The automotive half-shaft heat treatment processing apparatus according to claim 3, characterized in that, The second connecting cavity (13B) is provided with a conduit (5), which is used to guide the liquid in the second cooling zone (12) to the outside.

6. The automotive half-shaft heat treatment processing apparatus according to claim 4, characterized in that, Of the four cylinders (22), two cylinders (22) are used to provide gaseous cooling medium to the first cooling zone (11), and the other two cylinders (22) are used to provide liquid cooling medium to the second cooling zone (12); Two symmetrically arranged cylinders (22) are used to provide two different cooling media; or, two symmetrically arranged cylinders (22) are used to provide the same cooling media.

7. The automotive half-shaft heat treatment processing apparatus according to claim 4, characterized in that, The drive mechanism (26) includes: Four hinge rods (261) are hinged to each other at both ends, and the hinge shafts (262) of two hinge rods (261) are rotatably connected to the plug body (23); Two drive rods (263) are located above and below the four hinge rods (261), respectively. The centers of the two drive rods (263) are connected to the drive body (27) through the drive shaft (28). The ends of the two drive rods (263) are connected by a fixed shaft (264). The outer side of the fixed shaft (264) is provided with a first rotating sleeve (265), and the inner side of the hinge rod (261) is provided with a drive slot (266) corresponding to the first rotating sleeve (265).

8. The automotive half-shaft heat treatment processing apparatus according to claim 7, characterized in that, The hinge shaft (262) has a second rotating sleeve (267) on its outer side, and the drive rod (263) has an arc-shaped part (268) for applying force to the second rotating sleeve (267).

9. A method for heat treatment of an automobile half-shaft, comprising processing the half-shaft using the automobile half-shaft heat treatment apparatus according to any one of claims 1-8, characterized in that, include: The heated half shaft (6) is conveyed to the first cooling zone (11) of the cooling section (1) using the conveying clamp (3); Gas cooling medium is supplied to the first cooling zone (11) through the cooling medium supply unit (2), and air is blown evenly onto the surface of the half shaft (6) for pre-cooling; After the half shaft (6) is cooled to the set temperature in the first cooling zone (11), the half shaft (6) is transported to the second cooling zone (12) by the conveying clamp (3). The cooling medium supply unit (2) provides liquid cooling medium to the second cooling zone (12) and sprays it evenly onto the surface of the half shaft (6) to accelerate cooling. After the half shaft (6) finishes accelerated cooling in the second cooling zone (12), the half shaft (6) is transported to the first cooling zone (11) again by the conveying clamp (3), and air is blown quickly onto the surface of the half shaft (6).

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