Heat treatment system for machining shaft forgings

Abstract

The invention relates to a heat treatment system for processing shaft forgings, which comprises a heat treatment furnace, the heat treatment furnace is provided with a cavity, a heat preservation partition plate is arranged in the cavity to divide the cavity into a plurality of heat treatment cavities, and a shaft forge piece placing unit is arranged in each heat treatment cavity; the shaft forge piece placing unit is driven by a horizontal driving mechanism to move into or out of the heat treatment cavities, and an electric heating rod, a temperature sensor and a time relay are arranged in each heat treatment cavity; and the controller is connected with each electric heating rod, the temperature sensor, the time relay and the horizontal driving mechanism, and is used for receiving data signals of the temperature sensor and the time relay and controlling the on-off of the electric heating rods and the action of the horizontal driving mechanism. According to the heat treatment furnace, the heat preservation partition plates are arranged in the heat treatment furnace to divide the heat treatment furnace into the multiple independent heat treatment cavities, and therefore heat treatment machining of different temperatures and different time can be conducted on shaft forgings of different batches in one heat treatment furnace at the same time, and the heat treatment efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of heat treatment of forgings, and particularly to a heat treatment system for machining shaft forgings. Background Technology

[0002] Forgings are workpieces produced by forging. Shafts such as spindles, bushings, gear rings, flanges, and tapered sleeves are also mainly produced by forging. Before or after forging, these workpieces need to undergo heat treatment to improve their performance. Traditional forging heat treatment equipment can basically meet people's needs.

[0003] As the requirements for workpieces become increasingly stringent, the demands on heat treatment of shaft-type workpieces have also risen. Traditional heat treatment typically requires only one step, but with changes in processes, two or even more heat treatment processes are needed to improve the heat treatment effect and thus enhance the performance of the workpiece. In actual production, especially forging processing companies, heat treatment furnaces generally operate continuously to achieve continuous production. When multiple heat treatments are required, the temperature and time for heat treatment vary. This means that a single heat treatment furnace can only heat treat shaft-type workpieces from the same batch and in the same process, while shaft-type workpieces from different processes must wait sequentially, resulting in a longer process cycle. To reduce waiting time, the number of heat treatment furnaces can be increased to meet the requirements of different temperatures and times, thereby shortening the process cycle. However, this increases the company's production costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a heat treatment system for processing shaft forgings, which can simultaneously perform heat treatment processing at different temperatures and for different times on different batches of shaft forgings.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a heat treatment system for machining shaft forgings, the innovation of which lies in: including A heat treatment furnace has a cavity, and a heat-insulating partition is provided in the cavity to divide the cavity into multiple heat treatment chambers. Each heat treatment chamber is provided with a shaft forging placement unit, and the shaft forging placement unit is driven into or out of the heat treatment chamber by a horizontal drive mechanism. The horizontal drive mechanism can realize the independent operation of a single shaft forging placement unit and the synchronous operation of multiple shaft forging placement units. Each heat treatment chamber is also provided with an electric heating rod, a temperature sensor, and a time relay. A controller is connected to each electric heating rod, temperature sensor, time relay and horizontal drive mechanism, and is used to receive data signals from temperature sensor and time relay, and to control the opening and closing of electric heating rod and the operation of horizontal drive mechanism. When using a heat treatment system to heat treat shaft forgings, firstly, select a suitable heat treatment chamber based on the required temperature and time parameters of the shaft forgings to be heat treated. Secondly, place the shaft forgings to be heat treated in the shaft forging placement unit of the corresponding heat treatment chamber, and enter the heat treatment chamber together with the shaft forging placement unit. Finally, the electric heating rod operates to heat treat the shaft forgings.

[0006] Furthermore, the heat treatment method of the heat treatment system includes the following steps: S1: First, label each heat treatment cavity as heat treatment cavity 1#, heat treatment cavity 2#, ... n#, where n is an integer ≥ 3, and store the label data in the controller; S2: Confirm the required heat treatment temperature and time for the shaft forgings to be heat treated, and feed back the heat treatment temperature and time data to the controller. At the same time, the controller also stores the temperature and time of the shaft forgings that are already undergoing heat treatment, as well as the turnaround time required for loading or unloading a single batch of shaft forgings. S3: The controller first judges the time of the shaft forging that has been heat treated based on the data transmitted by the time relay. If the remaining heat treatment time of the shaft forging that has been heat treated is not more than half of the turnover time, then proceed to step S4. If the remaining heat treatment time of the shaft forging that has been heat treated is more than half of the turnover time, then proceed directly to step S5. S4: After all the shaft forgings that meet the conditions in step S3 have completed heat treatment, proceed to step S5; S5: The controller collects the temperature in each empty heat treatment cavity and compares it with the temperature required for the shaft forging to be heat treated, and selects the empty heat treatment cavity that is closest to the required temperature. S6: After the empty heat treatment cavity is determined, the controller controls the horizontal drive mechanism to pull out the corresponding empty shaft forging placement unit from the empty heat treatment cavity and load it. At the same time, the fully loaded shaft forging placement unit that has been heat treated in step S4 is pulled out from the heat treatment cavity and unloaded. After loading and unloading are completed, the controller controls the horizontal drive mechanism to push the shaft forging placement unit containing the shaft forging back into the heat treatment cavity. S7: The controller starts the electric heating rod in the heat treatment chamber to heat treat the shaft forging, and holds the temperature in the heat treatment chamber when the temperature reaches the required value. At the same time, the time relay works to keep track of the time and feeds the time data back to the controller. S8: The controller makes a judgment based on the time data fed back by the time relay. After the set time is reached, the electric heating rod stops working. Then the controller controls the horizontal drive mechanism to pull the shaft forging placement unit out of the heat treatment chamber, unload the material, and complete the heat treatment of the shaft forging.

[0007] Furthermore, in step S5, when selecting the closest empty heat treatment cavity, the real-time temperature of the empty heat treatment cavity is defined as T. 空 The required heat treatment temperature for the shaft forgings to be processed is T. 需， The controller's judgment criterion is T. 差 According to formula T 需 -T 空 =T 差 The calculation yields =T 差 The value of , where the real-time temperature T 空 With T 差 The value is given by the required heat treatment temperature T. 需 For a single value or a range of values, when T 需 When the value is within a range, take T. 需 Substituting the maximum value into the above formula for calculation, the resulting differences T are... 差 Based on the labels of each heat treatment cavity, they are sequentially defined as T. 差1 T 差2 ...T 差n T is controlled by the controller 差 Make a judgment and assign each T to a different T. 差 Perform aggregation, {T 差1 T 差2 , ...T 差n The smallest natural number in the set is selected as the optimal solution, and the controller controls the horizontal drive mechanism corresponding to the solution to pull the corresponding shaft forging placement unit out of the empty heat treatment cavity and load it.

[0008] Furthermore, the shaft forging placement unit includes a placement box, in which at least a pair of placement plates are provided. Several arc-shaped grooves are opened on the upper surface of the placement plates, and the arc-shaped grooves at the same position on each placement plate cooperate to achieve positioning support for the shaft forging. The placement box is driven by a horizontal drive mechanism to perform independent horizontal reciprocating movement or synchronous reciprocating movement of multiple placement boxes.

[0009] Furthermore, the placement box includes a placement box body and a drive side plate connected to the side end of the placement box body. The placement box body is a hollow cuboid box structure with an open top, and the placement plate is placed in the cavity of the placement box body. The horizontal drive mechanism includes a horizontal guide rail, a horizontal drive cylinder, a drive plate and an electromagnet. There are several horizontal guide rails, which are distributed one-to-one in each heat treatment cavity. At the same time, a horizontal slider that corresponds to and cooperates with the horizontal guide rail is installed at the bottom of each placement box body. There is a pair of horizontal drive cylinders, which are respectively installed on both sides of the outer wall of the heat treatment furnace. The drive plate is located on the front side of the heat treatment furnace, and the drive plate is driven by the two horizontal drive cylinders to move closer to or away from each placement box. On the side of the drive plate that is close to the placement box, there is also an electromagnet corresponding to each placement box. At the same time, a magnetic plate that cooperates with the electromagnet is also built into the drive side plate.

[0010] Furthermore, a sealing ring is provided between the drive side plate and the heat treatment furnace. The drive side plate extends out of the main body of the placement box on all four sides, thereby forming a closed section. The closed section is stepped. At the same time, a stepped positioning groove that matches the closed section is opened on the side wall of the heat treatment furnace. An installation groove for installing the sealing ring is opened on the closed section.

[0011] Furthermore, the heat insulation partition includes horizontal partitions and vertical partitions. The horizontal partitions are distributed sequentially from top to bottom in the cavity of the heat treatment furnace and divide the cavity of the heat treatment furnace into several vertically distributed partition cavities. The vertical partitions are horizontally distributed in each partition cavity and divide each partition cavity into several heat treatment cavities.

[0012] The advantages of this invention are as follows: The heat treatment system of this invention, by setting up heat insulation partitions in the heat treatment furnace to separate multiple independent heat treatment chambers, can simultaneously perform heat treatment processing of different batches of shaft forgings at different temperatures and for different times in one heat treatment furnace, thereby improving heat treatment efficiency.

[0013] The heat treatment method of the present invention collects the remaining time of the fully loaded heat treatment chamber and the temperature of the empty heat treatment chamber, and combines the loading and unloading time with the temperature of the shaft forgings to be heat treated. The data is collected and uniformly scheduled by a controller so as to achieve the loading and unloading of more shaft forgings placement units with the fewest actions, while realizing continuous production and reducing the waiting time caused by loading and unloading.

[0014] The horizontal drive mechanism is designed using a combination of a drive plate and electromagnets to achieve the horizontal movement of each heat treatment box. This allows for both individual operation of a single heat treatment box and synchronous operation of multiple heat treatment boxes, providing a solid foundation for the subsequent continuous heat treatment of multiple batches of shaft forgings.

[0015] By setting a sealing ring between the drive side plate and the heat treatment furnace, and by using a stepped closed section on the drive side plate to cooperate with the positioning groove on the heat treatment furnace, the heat treatment chamber can be kept airtight, thus preventing heat loss.

[0016] The heat treatment chambers are divided into several chambers by a combination of horizontal and vertical partitions. This is to ensure that each heat treatment chamber has good heat preservation and to avoid mutual interference between adjacent heat treatment chambers, thereby reducing temperature interference and ensuring the heat treatment temperature within each individual heat treatment chamber. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the interior of the heat treatment furnace in this invention.

[0018] Figure 2 This is a side view of the heat treatment furnace in this invention.

[0019] Figure 3 This is a schematic diagram of the placement box in this invention.

[0020] Figure 4 This is a schematic diagram of the placement plate in this invention. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] like Figures 1-4 The heat treatment system for machining shaft forgings shown includes: A heat treatment furnace 1 has a cavity within it. Insulating partitions are installed within the cavity, dividing it into multiple heat treatment chambers 4. The insulating partitions include horizontal partitions 2 and vertical partitions 3. The horizontal partitions 2 are arranged vertically from top to bottom within the cavity of the heat treatment furnace 1, dividing it into several vertically distributed partitioned chambers. Several vertical partitions 2 are horizontally distributed within each partitioned chamber, dividing each partitioned chamber into several heat treatment chambers 4. This ultimately forms several heat treatment chambers 4 arranged in a rectangular array. Each heat treatment chamber 4 is a cuboid cavity. The arrangement of the heat treatment chambers 4, using the combined action of horizontal partitions 2 and vertical partitions 3, divides the cavity of the heat treatment furnace 1 into several heat treatment chambers 4. This serves two purposes: firstly, to ensure good insulation for each heat treatment chamber 4; and secondly, to prevent mutual interference between adjacent heat treatment chambers 4, reducing temperature interference and ensuring the heat treatment temperature within each individual heat treatment chamber 4.

[0023] Each heat treatment chamber 4 is equipped with a shaft forging placement unit, which is driven by a horizontal drive mechanism to move into or out of the heat treatment chamber 4. The horizontal drive mechanism can realize the independent action of a single shaft forging placement unit, as well as the synchronous action of multiple shaft forging placement units. Each heat treatment chamber 4 is also equipped with an electric heating rod, a temperature sensor, and a time relay.

[0024] like Figure 3 , Figure 4 As shown in the schematic diagram, the shaft forging placement unit includes a placement box, in which a pair of placement plates 5 are provided. Several arc-shaped grooves 6 are opened on the upper surface of the placement plates 5, and the arc-shaped grooves 6 on each placement plate 5 at the same position work together to achieve positioning support for the shaft forging. The placement box is driven by a horizontal drive mechanism to move horizontally independently or to move synchronously with multiple placement boxes. On one side of the heat treatment furnace 1, there is also an opening for each placement box to be inserted one by one, and the side of the heat treatment furnace 1 with the opening is defined as the front side of the heat treatment furnace 1.

[0025] Specifically, the placement box includes a placement box body 7 and a drive side plate 8 connected to the side of the placement box body 7. The placement box body 7 is a hollow cuboid box structure with an open top, and the placement plate 5 is placed in the cavity of the placement box body 7.

[0026] The horizontal drive mechanism includes a horizontal guide rail 11, a horizontal drive cylinder 12, a drive plate 13, and an electromagnet 14. There are several horizontal guide rails 11, which are distributed one-to-one in each heat treatment cavity 4. There are two horizontal guide rails 11 in the same heat treatment cavity 4, which are arranged side by side in the heat treatment cavity 4. At the same time, a horizontal slider 10 is installed at the bottom of each placement box body 7, which corresponds to and cooperates with each horizontal guide rail 11. There are two horizontal sliders 10 that cooperate with the same horizontal guide rail 11.

[0027] A pair of horizontal drive cylinders 12 are installed on both sides of the outer wall of the heat treatment furnace 1. The drive plate 13 is located on the front side of the heat treatment furnace 1, and the drive plate 13 is driven by the two horizontal drive cylinders 12 to move closer to or away from each placement box. On the side of the drive plate 13 closer to the placement box, an electromagnet 14 corresponding to each placement box is also installed. At the same time, a magnetic plate 9 that cooperates with the electromagnet 14 is also built into the drive side plate 8. The horizontal drive mechanism is designed to achieve the horizontal movement of each heat treatment box by cooperating with the drive plate 13 and the electromagnet 14. It can realize the individual movement of a single heat treatment box or the synchronous movement of multiple heat treatment boxes, providing a good foundation for the continuous heat treatment of multiple batches of shaft forgings.

[0028] A sealing ring is also provided between the drive side plate 8 and the heat treatment furnace 1. The drive side plate 8 extends out of the placement box body 7 on all four sides, thus forming a closed section. The closed section is stepped. At the same time, a stepped positioning groove that matches the closed section is opened on the side wall of the heat treatment furnace 1. An installation groove 15 for installing the sealing ring is opened on the closed section.

[0029] A controller is connected to each electric heating rod, temperature sensor, time relay, horizontal drive cylinder 12 of the horizontal drive mechanism, and electromagnet 14. The temperature sensor is used to detect the temperature inside the heat treatment chamber 4 and transmit the temperature data to the controller. The time relay is used to time the heat treatment chamber 4 that is undergoing heat treatment and also transmits the time data to the controller. The controller is also used to control the opening and closing of the electric heating rods and the action of the horizontal drive mechanism. The action of the horizontal drive mechanism includes the horizontal drive cylinder 12 pushing the drive plate 13 closer to or away from the placement plate and whether the electromagnet 14 is energized.

[0030] When using a heat treatment system to heat treat shaft forgings, firstly, select a suitable heat treatment chamber based on the required temperature and time parameters of the shaft forgings to be heat treated. Secondly, place the shaft forgings to be heat treated in the shaft forging placement unit of the corresponding heat treatment chamber, and enter the heat treatment chamber together with the shaft forging placement unit. Finally, the electric heating rod operates to heat treat the shaft forgings.

[0031] Specifically, based on the above-mentioned heat treatment system, the heat treatment method for shaft forgings of the present invention is implemented through the following steps: S1: First, each heat treatment cavity 4 is labeled as heat treatment cavity 1#, heat treatment cavity 2#, ..., n#, where n is an integer ≥ 3. The label data is stored in the controller. At the same time, each electromagnet 14 is also labeled as electromagnet 1#, electromagnet 2#, ..., n#, with each electromagnet 14 corresponding to each heat treatment cavity 4.

[0032] S2: Confirm the required heat treatment temperature and time for the shaft forgings to be heat treated, and feed back the heat treatment temperature and time data to the controller. At the same time, the controller also stores the temperature and time of shaft forgings that are already undergoing heat treatment, as well as the turnaround time required for loading or unloading a single batch of shaft forgings.

[0033] S3: The controller first judges the time of the shaft forging that has been heat-treated based on the data transmitted by the time relay. If the remaining heat treatment time of the shaft forging that has been heat-treated is not more than half of the turnover time, then proceed to step S4. If the remaining heat treatment time of the shaft forging that has been heat-treated is more than half of the turnover time, then proceed directly to step S5.

[0034] S4: After all shaft forgings that meet the conditions in step S3 have completed heat treatment, proceed to step S5. The design of steps S3-S4 is to reduce the number of subsequent actions of the horizontal drive cylinder 12, provided that time permits. The time required for loading and unloading is relatively short. Therefore, by detecting the heat treatment time, if there is a heat treatment cavity 4 that is about to complete heat treatment, the corresponding placement box of the heat treatment cavity can be pulled out together after the heat treatment is completed, thus reducing the number of actions of the horizontal drive cylinder 12.

[0035] S5: The controller collects the temperature inside each empty heat treatment cavity and compares it with the temperature required for the shaft forging to be heat treated, and selects the empty heat treatment cavity that is closest to the required temperature.

[0036] When selecting the closest empty heat treatment cavity, the real-time temperature of the empty heat treatment cavity is defined as T. 空 The required heat treatment temperature for the shaft forgings to be processed is T. 需， The controller's judgment criterion is T. 差 According to formula T 需 -T 空 =T 差 The calculation yields =T 差 The value of , where the real-time temperature T 空 With T 差 The value is given by the required heat treatment temperature T. 需 For a single value or a range of values, when T 需 When the value is within a range, take T. 需 Substituting the maximum value into the above formula for calculation, the resulting differences T are... 差 Based on the labels of each heat treatment cavity, they are sequentially defined as T. 差1 T 差2 ...T 差n T is controlled by the controller 差 Make a judgment and assign each T to a different T. 差 Perform aggregation, {T 差1 T 差2 , ...T 差n The smallest natural number in the set is selected as the optimal solution, and the controller controls the horizontal drive mechanism corresponding to the solution to pull the corresponding shaft forging placement unit out of the empty heat treatment cavity and load it.

[0037] When selecting an empty heat treatment chamber, the temperature inside the empty heat treatment chamber is first compared with the temperature required by the shaft forging to be heat treated. The closest empty heat treatment chamber is then selected before loading the shaft forging. This allows the shaft forging to reach the required heat treatment temperature more quickly and also reduces the energy consumption of the corresponding electric heating rod, making it more energy-efficient.

[0038] S6: After the empty heat treatment cavity is determined, the controller controls the horizontal drive mechanism to pull out the corresponding empty shaft forging placement unit from the empty heat treatment cavity and load it. At the same time, the fully loaded shaft forging placement unit that has been heat treated in step S4 is pulled out from the heat treatment cavity and unloaded. After loading and unloading are completed, the controller controls the horizontal drive mechanism to push the shaft forging placement unit containing the shaft forging back into the heat treatment cavity.

[0039] S7: The controller starts the electric heating rod in the heat treatment chamber to heat treat the shaft forging. When the temperature in the heat treatment chamber reaches the required value, it is kept at that temperature. At the same time, the time relay works to keep track of the time and feeds the time data back to the controller.

[0040] S8: The controller makes a judgment based on the time data fed back by the time relay. After the set time is reached, the electric heating rod stops working. Then the controller controls the horizontal drive mechanism to pull the shaft forging placement unit out of the heat treatment chamber, unload the material, and complete the heat treatment of the shaft forging.

[0041] The heat treatment method of the present invention collects the remaining time of the fully loaded heat treatment chamber and the temperature of the empty heat treatment chamber, and combines the loading and unloading time with the temperature of the shaft forgings to be heat treated. The data is collected and uniformly scheduled by a controller so as to achieve the loading and unloading of more shaft forgings placement units with the fewest actions, while realizing continuous production and reducing the waiting time caused by loading and unloading.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A heat treatment system for machining shaft forgings, characterized in that: include A heat treatment furnace has a cavity, and a heat-insulating partition is provided in the cavity to divide the cavity into multiple heat treatment chambers. Each heat treatment chamber is provided with a shaft forging placement unit, and the shaft forging placement unit is driven into or out of the heat treatment chamber by a horizontal drive mechanism. The horizontal drive mechanism can realize the independent operation of a single shaft forging placement unit and the synchronous operation of multiple shaft forging placement units. Each heat treatment chamber is also provided with an electric heating rod, a temperature sensor, and a time relay. A controller is connected to each electric heating rod, temperature sensor, time relay and horizontal drive mechanism, and is used to receive data signals from temperature sensor and time relay, and to control the opening and closing of electric heating rod and the operation of horizontal drive mechanism. When using a heat treatment system to heat treat shaft forgings, firstly, select a suitable heat treatment chamber based on the required temperature and time parameters of the shaft forgings to be heat treated. Secondly, place the shaft forgings to be heat treated in the shaft forging placement unit of the corresponding heat treatment chamber, and enter the heat treatment chamber together with the shaft forging placement unit. Finally, the electric heating rod operates to heat treat the shaft forgings.

2. The heat treatment system for machining shaft forgings according to claim 1, characterized in that: The heat treatment method of the heat treatment system includes the following steps: S1: First, label each heat treatment cavity as heat treatment cavity 1#, heat treatment cavity 2#, ... n#, where n is an integer ≥ 3, and store the label data in the controller; S2: Confirm the required heat treatment temperature and time for the shaft forgings to be heat treated, and feed back the heat treatment temperature and time data to the controller. At the same time, the controller also stores the temperature and time of the shaft forgings that are already undergoing heat treatment, as well as the turnaround time required for loading or unloading a single batch of shaft forgings. S3: The controller first judges the time of the shaft forging that has been heat treated based on the data transmitted by the time relay. If the remaining heat treatment time of the shaft forging that has been heat treated is not more than half of the turnover time, then proceed to step S4. If the remaining heat treatment time of the shaft forging that has been heat treated is more than half of the turnover time, then proceed directly to step S5. S4: After all the shaft forgings that meet the conditions in step S3 have completed heat treatment, proceed to step S5; S5: The controller collects the temperature in each empty heat treatment cavity and compares it with the temperature required for the shaft forging to be heat treated, and selects the empty heat treatment cavity that is closest to the required temperature. S6: After the empty heat treatment cavity is determined, the controller controls the horizontal drive mechanism to pull out the corresponding empty shaft forging placement unit from the empty heat treatment cavity and load it. At the same time, the fully loaded shaft forging placement unit that has been heat treated in step S4 is pulled out from the heat treatment cavity and unloaded. After loading and unloading are completed, the controller controls the horizontal drive mechanism to push the shaft forging placement unit containing the shaft forging back into the heat treatment cavity. S7: The controller starts the electric heating rod in the heat treatment chamber to heat treat the shaft forging, and holds the temperature in the heat treatment chamber when the temperature reaches the required value. At the same time, the time relay works to keep track of the time and feeds the time data back to the controller. S8: The controller makes a judgment based on the time data fed back by the time relay. After the set time is reached, the electric heating rod stops working. Then the controller controls the horizontal drive mechanism to pull the shaft forging placement unit out of the heat treatment chamber, unload the material, and complete the heat treatment of the shaft forging.

3. The heat treatment system for machining shaft forgings according to claim 2, characterized in that: In step S5, when selecting the closest empty heat treatment cavity, the real-time temperature of the empty heat treatment cavity is defined as T. 空 The required heat treatment temperature for the shaft forgings to be processed is T. 需， The controller's judgment criterion is T. 差 According to formula T 需 -T 空 =T 差 The calculation yields =T 差 The value of , where the real-time temperature T 空 With T 差 The value is given by the required heat treatment temperature T. 需 For a single value or a range of values, when T 需 When the value is within a range, take T. 需 Substituting the maximum value into the above formula for calculation, the resulting differences T are... 差 Based on the labels of each heat treatment cavity, they are sequentially defined as T. 差1 T 差2 ...T 差n T is controlled by the controller 差 Make a judgment and assign each T to a different T. 差 Perform aggregation, {T 差1 T 差2 , ...T 差n The smallest natural number in the set is selected as the optimal solution, and the controller controls the horizontal drive mechanism corresponding to the solution to pull the corresponding shaft forging placement unit out of the empty heat treatment cavity and load it.

4. The heat treatment system for machining shaft forgings according to claim 1, characterized in that: The shaft forging placement unit includes a placement box, in which at least one pair of placement plates are provided. Several arc-shaped grooves are opened on the upper surface of the placement plates, and the arc-shaped grooves at the same position on each placement plate work together to achieve positioning support for the shaft forging. The placement box is driven by a horizontal drive mechanism to perform independent horizontal reciprocating movement or synchronous reciprocating movement of multiple placement boxes.

5. The heat treatment system for machining shaft forgings according to claim 4, characterized in that: The placement box includes a placement box body and a drive side plate connected to the side of the placement box body. The placement box body is a hollow cuboid box structure with an open top, and the placement plate is placed in the cavity of the placement box body. The horizontal drive mechanism includes a horizontal guide rail, a horizontal drive cylinder, a drive plate and an electromagnet. There are several horizontal guide rails, which are distributed one-to-one in each heat treatment cavity. At the same time, a horizontal slider that corresponds to and cooperates with the horizontal guide rail is installed at the bottom of each placement box body. There is a pair of horizontal drive cylinders, which are respectively installed on both sides of the outer wall of the heat treatment furnace. The drive plate is located on the front side of the heat treatment furnace, and the drive plate is driven by the two horizontal drive cylinders to move closer to or away from each placement box. On the side of the drive plate that is close to the placement box, there is also an electromagnet corresponding to each placement box. At the same time, a magnetic plate that cooperates with the electromagnet is also built into the drive side plate.

6. The heat treatment system for machining shaft forgings according to claim 5, characterized in that: A sealing ring is also provided between the drive side plate and the heat treatment furnace. The drive side plate extends out of the main body of the placement box on all four sides, thus forming a closed section. The closed section is stepped. At the same time, a stepped positioning groove that matches the closed section is opened on the side wall of the heat treatment furnace. An installation groove for installing the sealing ring is opened on the closed section.

7. The heat treatment system for machining shaft forgings according to claim 1, characterized in that: The heat insulation partition includes horizontal partitions and vertical partitions. The horizontal partitions are distributed sequentially from top to bottom in the cavity of the heat treatment furnace, dividing the cavity of the heat treatment furnace into several vertically distributed partition cavities. The vertical partitions are horizontally distributed in each partition cavity, dividing each partition cavity into several heat treatment cavities.

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