Half axle automatic tempering production line temperature zone changing mechanism

Abstract

The application discloses a semi-axle automatic tempering production line temperature zone conversion mechanism, which comprises a heating box and a cooling pool arranged at the outlet end of the heating box, a heating pipe and a cooling pipe are arranged in the wall of the heating box, the cooling pool comprises a first cooling pool, a second cooling pool and a third cooling pool, the heating box comprises a first heating box, a second heating box and a third heating box, and a first air inlet pipe, a second air inlet pipe and a third air inlet pipe are arranged on the lower side of the first heating box, the second heating box and the third heating box respectively. The semi-axle automatic tempering production line temperature zone conversion mechanism with the above structure can not only reduce the heating time in the low-temperature zone, but also effectively utilize energy, and the operation of the mechanism is automatically controlled, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a temperature zone changing mechanism for an automatic tempering production line for half-shafts. Background Technology

[0002] The half-shaft is a linkage in a motor vehicle that drives the wheels. It not only bears combined bending and torsional moments but also certain impact loads. Therefore, the half-shaft should have sufficient strength, toughness, and good fatigue resistance.

[0003] Half shafts are generally improved in terms of performance through quenching and tempering during heat treatment. After hot working, quenched and tempered steel must undergo preheating treatment to reduce hardness. This not only facilitates cutting during subsequent processing but also eliminates structural defects caused by hot working, refines grains, improves microstructure, and prepares the material for final heat treatment.

[0004] Currently, half-shafts typically have three temperature zones during heat treatment to achieve heating during the tempering process. Different half-shaft materials have corresponding requirements for the high-temperature, medium-temperature, and low-temperature zones during heating. However, during temperature control, cooling down the high-temperature zone significantly impacts production efficiency. In existing technologies, cooling the high-temperature zone from 910℃ to 800℃ via natural cooling takes approximately two hours, wasting energy and affecting production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a temperature zone changing mechanism for an automatic tempering production line for half-shafts, which not only reduces the heating time in the low-temperature zone and improves work efficiency, but also makes energy more efficient and saves energy consumption.

[0006] To achieve the above objectives, the present invention provides a temperature zone changing mechanism for an automatic half-shaft conditioning production line, comprising a heating box and a cooling pool disposed at the outlet end of the heating box. The heating box has heating pipes and cooling pipes inside its wall. The cooling pool includes a first cooling pool, a second cooling pool, and a third cooling pool. The heating box comprises a first heating box, a second heating box, and a third heating box. A first air inlet pipe, a second air inlet pipe, and a third air inlet pipe are respectively disposed on the lower part of one side of each of the first, second, and third heating boxes. A first air outlet pipe connected to the second and third air inlet pipes is disposed on the upper part of the other side of the first heating box. A second air outlet pipe connected to the third air inlet pipe is disposed on the upper part of the other side of the second heating box. A third air outlet pipe is disposed on the upper part of the other side of the third heating box and extends to the third cooling pool.

[0007] The first heating box, the second heating box, and the third heating box are respectively provided with a first cooling pipe inlet, a second cooling pipe inlet, and a third cooling pipe inlet at one end, and respectively provided with a first cooling pipe outlet, a second cooling pipe outlet, and a third cooling pipe outlet at the other end, and the first cooling pipe outlet, the second cooling pipe outlet, and the third cooling pipe outlet all extend to the third cooling pool.

[0008] Preferably, the output ends of the first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are all trumpet-shaped, and the branch pipes of the first air outlet pipe and the second air outlet pipe extend to the first cooling pool and the second cooling pool, respectively.

[0009] Preferably, the outlet of the first cooling pipe extending to the third cooling pool passes through the first cooling pool and the second cooling pool, and the outlet of the second cooling pipe extending to the third cooling pool passes through the second cooling pool.

[0010] Preferably, both the heating tube and the cooling tube are spring-shaped, and the heating tube and the cooling tube are staggered, with the outer diameter of the cooling tube being larger than the outer diameter of the heating tube.

[0011] Preferably, a first cooling solenoid valve is provided on the first cooling pipe located in the first cooling pool, a second cooling solenoid valve is provided on the first cooling pipe located in the second cooling pool, and a third cooling solenoid valve is provided on the second cooling pipe located in the second cooling pool.

[0012] Preferably, the first cooling pipe inlet, the second cooling pipe inlet, and the third cooling pipe inlet are respectively equipped with a first cooling pipe inlet solenoid valve, a second cooling pipe inlet solenoid valve, and a third cooling pipe inlet solenoid valve; the first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are respectively equipped with a first air inlet solenoid valve, a second air inlet solenoid valve, and a third air inlet solenoid valve; the branch pipes of the first air outlet pipe, the branch pipes of the second air outlet pipe, and the third air outlet pipe are respectively equipped with a first air outlet solenoid valve, a second air outlet solenoid valve, and a third air outlet solenoid valve; a second solenoid valve is provided at the connection between the second air inlet pipe and the first air outlet pipe, and a third solenoid valve is provided at the connection between the third air inlet pipe and the first air outlet pipe.

[0013] Preferably, the first cooling pool and the second cooling pool are respectively equipped with a first cooling sensor and a second cooling sensor; the first cooling pipe and the first air outlet pipe located in the first cooling pool, the second cooling pipe and the second air outlet pipe located in the second cooling pool, and the third cooling pipe and the third air outlet pipe located in the third cooling pool are all arranged in a serpentine pattern.

[0014] Preferably, the heating temperatures of the first heating box, the second heating box, and the third heating box decrease sequentially, and a first temperature sensor, a second temperature sensor, and a third temperature sensor are respectively provided on one side of the inner wall of the first heating box, the second heating box, and the third heating box.

[0015] Preferably, the inner wall of the heating box is provided with a heat insulation layer, and the inlet end and outlet end of the heating box are both provided with heat insulation plates. The heat insulation plates are embedded in the inner wall of the heating box, and a thermometer is provided at the top of the heating box.

[0016] Therefore, the automatic tempering production line temperature zone changing mechanism of the present invention adopts the above-mentioned structure and is equipped with heating boxes of three different temperature zones to adapt to half shafts of different heating ranges; when the heating box in the high temperature zone is cooled down, the ingenious design of the air inlet pipe, cooling pipe and cooling pool not only reduces the cooling time and improves the working efficiency, but also saves energy, makes full use of energy, and further reduces the production cost of enterprises.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a top view of an embodiment of the temperature zone changing mechanism for the automatic tempering production line of the present invention.

[0019] Figure 2 This is a front view of the heating box in an embodiment of the temperature zone changing mechanism of the automatic tempering production line of the present invention.

[0020] Figure 3 This is a control flowchart of an embodiment of the temperature zone changing mechanism of the automatic tempering production line for half-shafts of the present invention.

[0021] Figure label:

[0022] 1. First cooling pool; 2. Second cooling pool; 3. Third cooling pool; 4. First heating chamber; 5. Second heating chamber; 6. Third heating chamber; 7. Heating tube; 8. Cooling tube; 9. First temperature sensor; 10. Heat insulation plate; 11. First air outlet pipe; 12. Second air inlet pipe; 13. Third air inlet pipe; 14. Second air outlet pipe; 15. Third cooling tube inlet solenoid valve; 16. Second solenoid valve; 17. Third solenoid valve; 18. Third air outlet solenoid valve; 19. Second air outlet solenoid valve; 20. Second cooling tube inlet solenoid valve; 21. First cooling tube outlet... 22. First cooling solenoid valve; 23. Second cooling solenoid valve; 24. Second cooling pipe outlet; 25. Third cooling solenoid valve; 26. First air inlet solenoid valve; 27. First air outlet solenoid valve; 28. First cooling pipe inlet solenoid valve; 29. ​​Thermometer; 30. Insulation layer; 31. Second temperature sensor; 32. Third temperature sensor; 33. Second air inlet solenoid valve; 34. Third air inlet solenoid valve; 35. First cooling sensor; 36. Second cooling sensor; 37. First air inlet pipe; 38. Third air outlet pipe; 39. Third cooling pipe outlet. Detailed Implementation

[0023] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] Example

[0025] like Figure 1-2The automatic tempering production line for half-shafts includes a temperature zone changing mechanism, comprising a heating chamber and a cooling pool located at the outlet of the heating chamber. The heating chamber and cooling pool are correspondingly arranged to facilitate the cooling of the half-shafts after heating. Heating pipes 7 and cooling pipes 8 are installed inside the heating chamber wall. Both heating pipes 7 and cooling pipes 8 are spring-shaped and wound inside the heating chamber wall. The heating pipes 7 and cooling pipes 8 are staggered, making the structure more compact. Preferably, the cross-sections of the cooling pipe 8 and the heating pipe 7 are isosceles triangles, and the outer diameter of the cooling pipe 8 is larger than that of the heating pipe 7, resulting in a larger coverage area and further aiding in the cooling of the heating chamber. The inner wall of the heating chamber is provided with an insulation layer 30 to reduce heat loss and provide insulation. Insulation plates 10 are installed at both the inlet and outlet of the heating chamber. The insulation plates 10 are embedded in the inner wall of the heating chamber, serving not only to insulate heat but also to support the heating chamber and enhance the structural strength. A thermometer 29 is installed at the top of the heating chamber for easy monitoring of real-time temperature and the progress of the operation.

[0026] The cooling tanks include a first cooling tank 1, a second cooling tank 2, and a third cooling tank 3. The specified temperature range for each of the three cooling tanks is 58℃ to 62℃, which is beneficial for the tempering of the half-shaft. The heating chambers include a first heating chamber 4, a second heating chamber 5, and a third heating chamber 6. The heating temperatures of the first heating chamber 4, the second heating chamber 5, and the third heating chamber 6 decrease sequentially. The first heating chamber 4 is the high-temperature zone, with a heating temperature range of 800℃ to 910℃; the second heating chamber 5 is the medium-temperature zone, with a heating temperature range of 600℃ to 800℃; and the third heating chamber 6 is the low-temperature zone, with a heating temperature range of 400℃ to 600℃.

[0027] The lower part of one side of the first heating chamber 4, the second heating chamber 5, and the third heating chamber 6 are respectively provided with a first air inlet pipe 37, a second air inlet pipe 12, and a third air inlet pipe 13. The output ends of the first air inlet pipe 37, the second air inlet pipe 12, and the third air inlet pipe 13 are all flared to guide air to dissipate heat to both sides and accelerate the air circulation speed. The upper part of the other side of the first heating chamber 4 is provided with a first air outlet pipe 11 connected to the second air inlet pipe 12 and the third air inlet pipe 13. The upper part of the other side of the second heating chamber 5 is provided with a second air outlet pipe 14 connected to the third air inlet pipe 13. The upper part of the other side of the third heating chamber 6 is provided with a third air outlet pipe 38 that extends to the third cooling pool 3.

[0028] The branch pipes of the first air outlet pipe 11 and the second air outlet pipe 14 extend to the first cooling pool 1 and the second cooling pool 2, respectively. The corresponding air inlet pipe and air outlet pipe are positioned at an upward angle, which not only maximizes the airflow path but also facilitates air diffusion. The high-temperature air, having absorbed significant heat, is supplied to the heating chambers in the other medium-temperature and low-temperature zones, reducing their heating time. Since the temperature difference between the first heating chamber 4 and the third heating chamber 6 is substantial, the high-temperature air from the first heating chamber 4 is supplied to the third heating chamber 6, resulting in a more significant heating effect and more efficient energy utilization. Simultaneously, it is supplied to the corresponding cooling pools, raising their temperature. This not only ensures effective energy utilization but also improves work efficiency.

[0029] The first heating chamber 4, the second heating chamber 5, and the third heating chamber 6 are respectively equipped with a first cooling pipe inlet, a second cooling pipe inlet, and a third cooling pipe inlet at one end. The other ends of the first heating chamber 4, the second heating chamber 5, and the third heating chamber 6 are respectively equipped with a first cooling pipe outlet 21, a second cooling pipe outlet 24, and a third cooling pipe outlet 39. Water flows into the cooling pipe inlets and circulates periodically within the cooling pipes inside the heating chamber walls. The water carries away heat at the cooling pipe outlets. Water has a high specific heat capacity and absorbs a significant amount of heat, effectively reducing the temperature of the heating chambers. The first cooling pipe outlet 21, the second cooling pipe outlet 24, and the third cooling pipe outlet 39 all extend to the third cooling pool 3. The first cooling pipe outlet 21, extending to the third cooling pool 3, passes through the first cooling pool 1 and the second cooling pool 2. The second cooling pipe outlet 24, extending to the third cooling pool 3, passes through the second cooling pool 2. Water that has absorbed a high amount of heat is injected into the cooling pool, providing conditions for subsequent cooling of the half-shaft in the cooling pool and effectively utilizing energy, thus saving energy consumption.

[0030] The first cooling pipe and the first air outlet pipe 11 located in the first cooling pool 1, the second cooling pipe and the second air outlet pipe 14 located in the second cooling pool, and the third cooling pipe and the third air outlet pipe 38 located in the third cooling pool 3 are all arranged in a serpentine pattern, which makes the heating area of ​​the cooling pool larger, absorbs more heat, and facilitates the cooling pool to reach the specified temperature of 58℃~62℃ more quickly.

[0031] The first cooling pool 1 and the second cooling pool 2 are respectively equipped with a first cooling sensor 35 and a second cooling sensor 36, both of which regulate a temperature of 62°C. A first cooling solenoid valve 22 is installed on the first cooling pipe located in the first cooling pool 1, a second cooling solenoid valve 23 is installed on the first cooling pipe located in the second cooling pool 2, and a third cooling solenoid valve 25 is installed on the second cooling pipe located in the second cooling pool 2. The heat absorbed in the cooling pipes is preferentially supplied to the corresponding cooling pool. When the temperature of the corresponding cooling pool is higher than 62°C, the corresponding temperature sensor regulates the opening and closing of the relevant cooling solenoid valve.

[0032] The inner walls of the first heating box 4, the second heating box 5, and the third heating box 6 are respectively equipped with a first temperature sensor 9, a second temperature sensor 31, and a third temperature sensor 32. The adjustable temperatures of the first temperature sensor 9, the second temperature sensor 31, and the third temperature sensor 32 are 870℃, 760℃, and 540℃, respectively. The first cooling pipe inlet, the second cooling pipe inlet, and the third cooling pipe inlet are respectively equipped with a first cooling pipe inlet solenoid valve 28, a second cooling pipe inlet solenoid valve 20, and a third cooling pipe inlet solenoid valve 15; the first air inlet pipe 37, the second air inlet pipe 12, and the third air inlet pipe 13 are respectively equipped with a first air inlet solenoid valve 26, a second air inlet solenoid valve 33, and a third air inlet solenoid valve 34; the branch pipes of the first air outlet pipe 11, the branch pipes of the second air outlet pipe 14, and the third air outlet pipe 38 are respectively equipped with a first air outlet solenoid valve 27, a second air outlet solenoid valve 19, and a third air outlet solenoid valve 18; a second solenoid valve 16 is provided at the connection between the second air inlet pipe 12 and the first air outlet pipe 11, and a third solenoid valve 17 is provided at the connection between the third air inlet pipe 13 and the first air outlet pipe 11. Different temperature sensors sense their corresponding control temperatures, raising or lowering them to control the opening and closing of the corresponding cooling pipe inlet solenoid valve, air inlet solenoid valve, air outlet solenoid valve, second solenoid valve 16, and third solenoid valve 17.

[0033] The solenoid valves, cooling sensors, and temperature sensors are all electrically connected to the PLC controller. The PLC is characterized by high reliability, anti-interference ability, and strong practicality. It senses the corresponding control temperature through the temperature sensor and cooling sensor and sends the signal to the PLC controller, which then controls the opening and closing of each solenoid valve to realize the automated control of energy circulation.

[0034] In use, the first heating chamber 4 operates at a high temperature of 800℃ to 910℃. Due to varying usage requirements, the diameter and material of the half-shaft differ, resulting in different required heating temperatures. When the first temperature sensor 9 detects that the temperature of the first heating chamber 4 is higher than the current half-shaft heating temperature, the temperature of the first heating chamber 4 needs to be lowered. During the cooling of the high-temperature heating chamber, high-temperature air is preferentially supplied to the heating chambers in the medium-temperature and low-temperature zones.

[0035] When the temperature of the first heating chamber 4 exceeds 870℃, the first temperature sensor 9 will transmit a signal to the first air inlet solenoid valve 26, the second solenoid valve 16, and the third solenoid valve 17, causing them to open simultaneously. The high-temperature air will diffuse from the first heating chamber 4 to the second heating chamber 5 and the third heating chamber 6, delivering heat to the low-temperature and medium-temperature zones, reducing the temperature of the first heating chamber 4, and at the same time, reducing the heating time of the medium-temperature and low-temperature heating chambers, thus improving work efficiency.

[0036] When the temperature of the first heating chamber 4 is less than 870℃, the temperature of the first heating chamber 4 drops significantly. The first temperature sensor 9 will transmit a signal to the first air inlet solenoid valve 26, the second solenoid valve 16, the third solenoid valve 17, the first air outlet solenoid valve 27, and the first cooling pipe inlet solenoid valve 28, causing them to open simultaneously. The high-temperature air will not only diffuse from the first heating chamber 4 to the second heating chamber 5 and the third heating chamber 6, transferring heat to the heating chambers in the medium-temperature zone and the low-temperature zone to reduce the temperature of the first heating chamber 4; moreover, the opening of the first air outlet solenoid valve 27 and the first cooling pipe inlet solenoid valve 28 will transfer some heat to the first cooling pool 1 and the second cooling pool 2, which will not only raise the temperature of the cooling pools, but also further shorten the cooling time of the first heating chamber 4.

[0037] Heat in the cooling pipes is preferentially transferred only to the corresponding cooling pools. When the temperature of the first cooling pool 1 exceeds 62℃, the PLC controller opens the first cooling solenoid valve 22 and the second cooling solenoid valve 23 to transfer heat to the second cooling pool 2 and the third cooling pool 3, raising their temperature. Simultaneously, the temperature of the first cooling pool 1 is controlled within the range of 58℃ to 62℃ to provide a suitable temperature for the half-shaft cooling. Similarly, the cooling process for the second heating box 5 and the third heating box 6 is similar to the above process. Figure 3 As shown, I will not go into further detail here.

[0038] Therefore, the automatic tempering production line temperature zone changing mechanism of the present invention adopts the above-mentioned structure and is equipped with heating boxes of three different temperature zones to adapt to half shafts of different heating ranges; when the heating box in the high temperature zone is cooled down, the ingenious design of the air inlet pipe, cooling pipe and cooling pool not only reduces the cooling time and improves the working efficiency, but also saves energy, makes full use of energy, and further reduces the production cost of enterprises.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A temperature zone changing mechanism for an automatic tempering production line with a half-shaft, characterized in that: The device includes a heating chamber and a cooling pool located at the outlet end of the heating chamber. The heating chamber has heating pipes and cooling pipes inside its wall. The cooling pool includes a first cooling pool, a second cooling pool, and a third cooling pool. The heating chamber includes a first heating chamber, a second heating chamber, and a third heating chamber. The lower part of one side of the first heating chamber, the second heating chamber, and the third heating chamber is respectively provided with a first air inlet pipe, a second air inlet pipe, and a third air inlet pipe. The upper part of the other side of the first heating chamber is provided with a first air outlet pipe connected to the second air inlet pipe and the third air inlet pipe. The upper part of the other side of the second heating chamber is provided with a second air outlet pipe connected to the third air inlet pipe. The upper part of the other side of the third heating chamber is provided with a third air outlet pipe that extends to the third cooling pool. One end of the first heating box, the second heating box, and the third heating box is respectively provided with a first cooling pipe inlet, a second cooling pipe inlet, and a third cooling pipe inlet, and the other end of the first heating box, the second heating box, and the third heating box is respectively provided with a first cooling pipe outlet, a second cooling pipe outlet, and a third cooling pipe outlet, and the first cooling pipe outlet, the second cooling pipe outlet, and the third cooling pipe outlet all extend to the third cooling pool; The first cooling pipe inlet, the second cooling pipe inlet, and the third cooling pipe inlet are respectively equipped with a first cooling pipe inlet solenoid valve, a second cooling pipe inlet solenoid valve, and a third cooling pipe inlet solenoid valve; the first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are respectively equipped with a first air inlet solenoid valve, a second air inlet solenoid valve, and a third air inlet solenoid valve; the branch pipes of the first air outlet pipe, the branch pipes of the second air outlet pipe, and the third air outlet pipe are respectively equipped with a first air outlet solenoid valve, a second air outlet solenoid valve, and a third air outlet solenoid valve; a second solenoid valve is provided at the connection between the second air inlet pipe and the first air outlet pipe, and a third solenoid valve is provided at the connection between the third air inlet pipe and the first air outlet pipe; The heating temperatures of the first heating box, the second heating box, and the third heating box decrease sequentially. A first temperature sensor, a second temperature sensor, and a third temperature sensor are respectively provided on one side of the inner wall of the first heating box, the second heating box, and the third heating box.

2. The temperature zone changing mechanism of the automatic tempering production line for half-shafts according to claim 1, characterized in that: The output ends of the first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are all trumpet-shaped, and the branch pipes of the first air outlet pipe and the second air outlet pipe extend to the first cooling pool and the second cooling pool, respectively.

3. The temperature zone changing mechanism of the automatic tempering production line for half-shafts according to claim 1, characterized in that: The outlet of the first cooling pipe extending to the third cooling pool passes through the first cooling pool and the second cooling pool, and the outlet of the second cooling pipe extending to the third cooling pool passes through the second cooling pool.

4. The temperature zone changing mechanism of the automatic tempering production line for half-shafts according to claim 1, characterized in that: Both the heating tube and the cooling tube are spring-shaped, and the heating tube and the cooling tube are arranged alternately, with the outer diameter of the cooling tube being larger than that of the heating tube.

5. The temperature zone changing mechanism of the automatic tempering production line for half-shafts according to claim 1, characterized in that: A first cooling solenoid valve is provided on the first cooling pipe located in the first cooling pool, a second cooling solenoid valve is provided on the first cooling pipe located in the second cooling pool, and a third cooling solenoid valve is provided on the second cooling pipe located in the second cooling pool.

6. The temperature zone changing mechanism of the automatic tempering production line for half-shafts according to claim 1, characterized in that: The first cooling pool and the second cooling pool are respectively equipped with a first cooling sensor and a second cooling sensor; the first cooling pipe and the first air outlet pipe located in the first cooling pool, the second cooling pipe and the second air outlet pipe located in the second cooling pool, and the third cooling pipe and the third air outlet pipe located in the third cooling pool are all arranged in a serpentine pattern.

7. The temperature zone changing mechanism of the automatic tempering production line for half-shafts according to claim 1, characterized in that: The heating box has an insulation layer on its inner wall, and heat insulation plates are provided at both the inlet and outlet ends of the heating box. The heat insulation plates are embedded in the inner wall of the heating box, and a thermometer is provided at the top of the heating box.

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