Die-casting die temperature control device and control method

Abstract

According to the die-casting die temperature control device and method provided by the invention, the mounting position of the temperature sensor on the die-casting die is determined based on the structural characteristics of the die-casting die, and the temperature sensor is mounted at the mounting position, so that accurate monitoring of the temperature of the die is ensured; determining a temperature range of each temperature sensor, collecting temperature data of the temperature sensors, comparing the temperature data with the temperature ranges, obtaining an abnormal temperature value and a corresponding installation position, selecting a target temperature control mode meeting the process requirement from a temperature control mode library based on the abnormal temperature value and the corresponding installation position, and sending the selected target temperature control mode to a server; and on the basis of the target temperature control mode, the temperature difference is combined, the control parameters are determined, temperature control is conducted on the die-casting die according to the control parameters, the temperature stability and accuracy of the die-casting die in the hub production process are achieved, and therefore the stability of the die and the quality of a hub in the production process are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of die casting moulds, and in particular to a temperature control device and a control method for a die casting mould. Background Art

[0002] The wheel hub is a cylindrical metal part whose center is mounted on an axle and whose inner profile supports the tire. The die-casting mold is an indispensable tool in the wheel hub manufacturing process. It not only determines the shape and size of the wheel hub, but also directly affects its strength and performance. The forging process of the wheel hub is divided into gravity forging and low-pressure casting. Gravity forging is the process of pouring liquid alloy into the die-casting mold and then naturally forming it, while low-pressure casting is the process of using low pressure to press the liquid alloy into the die-casting mold to form it. The mold used in the low-pressure casting process can produce wheels with high metal density, high strength and complex shapes. It is currently the main method for manufacturing aluminum alloy wheels. ‌

[0003] In the process of using die-casting molds to produce wheels, the temperature of the die-casting mold should be kept within a certain range to ensure the stability of the mold and the quality of the wheel during production. The stability of the mold temperature is very important. Temperature fluctuations can cause problems such as mold thermal cracking and product defects, affecting product consistency and mold life. The location and number of temperature sensors should be installed reasonably to ensure accurate monitoring of the mold temperature. Therefore, precise temperature control of the die-casting mold is very important. Summary of the invention

[0004] The present invention provides a die-casting mold temperature control device and a control method, which are used to solve the problems raised in the background technology.

[0005] A die-casting mold temperature control device, comprising: A position determination module, used for determining an installation position of a temperature sensor on the die-casting mold based on structural features of the die-casting mold, and installing the temperature sensor at the installation position; The temperature acquisition module is used to determine the temperature range of each temperature sensor based on the installation position, collect the temperature data of the temperature sensor and compare it with the temperature range, and obtain the abnormal temperature value and its corresponding installation position; A mode determination module is used to select a target temperature control mode that meets the process requirements from a temperature control mode library based on the abnormal temperature value and its corresponding installation position; The temperature control module is used to determine the control parameters based on the target temperature control method and the temperature difference, and to control the temperature of the die-casting mold according to the control parameters.

[0006] Preferably, the location determination module comprises: A feature acquisition unit, for obtaining a mold inlet shape, a flow channel shape, a cavity shape and a cooling system shape, and a mold inlet size, a flow channel length, a cavity surface area and a cooling system size based on structural features of the die-casting mold; An object determination unit, used to set an initial number of temperature sensors based on mold inlet size, runner length, cavity surface area, and cooling system size, and obtain temperature monitoring objects for the mold inlet, runner, cavity, and cooling system; a weight determination unit, configured to determine a first influence weight based on a stable temperature range of a temperature monitoring object, determine a second influence weight based on an influence of the temperature monitoring object on process quality, and determine a comprehensive influence weight on the temperature monitoring object based on the first influence weight and the second influence weight; a quantity determination unit, configured to perform weighted processing on an initial quantity of temperature sensors based on a difference between the comprehensive influence weight and the standard influence weight to obtain a target quantity; A position determination unit is used to determine the key positions of the mold inlet, runner, cavity and cooling system based on the mold inlet shape, runner shape, cavity shape and cooling system shape, and to distribute the positions of the temperature sensors based on the key positions and the target number to obtain the installation positions of the temperature sensors; The installation unit is used to determine an installation method based on the structural characteristics of the installation position, and install the temperature sensor at the installation position according to the installation method.

[0007] Preferably, the position determination unit comprises: A position acquisition unit, used for determining the center position of the mold inlet, runner, cavity and cooling system based on the mold inlet shape, runner shape, cavity shape and cooling system shape, and searching based on the center position to obtain the key position based on the processing features of the mold inlet, runner, cavity and cooling system; The parameter acquisition unit is used to determine the position, direction and distance based on the mold inlet shape, runner shape, cavity shape and cooling system shape, combined with the target quantity, and obtain the installation position of the temperature sensor based on the position, direction and distance, and the key position is used as a reference.

[0008] Preferably, the temperature acquisition module comprises: A range determination unit for setting a temperature range for each temperature sensor based on the installation location of the temperature sensor in the mold inlet, runner, cavity and cooling system; A collection unit, used to collect the temperature of each position of the die-casting mold based on a temperature sensor to obtain temperature data; The comparison unit is used to compare the temperature data with the temperature range, obtain an abnormal temperature value corresponding to the temperature data not within the temperature range, and determine an installation position corresponding to the abnormal temperature value based on a temperature sensor of the abnormal temperature value.

[0009] Preferably, the method determining module includes: A method selection unit, used to determine a temperature control object based on an installation position corresponding to an abnormal temperature value, and select a primary temperature control method that satisfies the temperature control object from a temperature control method library; The mode selection unit is further used to determine whether the temperature control operation is a cooling operation or a heating operation based on the relationship between the abnormal temperature value and the temperature range, and select an alternative temperature control mode that satisfies the temperature control operation based on the primary temperature control mode; A mode analysis unit, used for obtaining an action object and an action parameter type of each alternative temperature control mode, determining a control complexity based on the action object, determining a control time length based on the action parameter type, and determining a temperature control cost based on the action object and the action parameter type; A process analysis unit, for determining a process time requirement and a process difficulty constraint based on process requirements, evaluating control complexity based on the process difficulty constraint, selecting a first temperature control method that meets the process difficulty constraint from alternative temperature control methods, evaluating a control time length based on the process time requirement, selecting a second temperature control method that meets the process time requirement from alternative temperature control methods, and selecting a third temperature control method that meets both the first temperature control method and the second temperature control method; The mode determination unit is used to select a temperature control mode with the lowest temperature control cost from the third temperature control modes as a target temperature control mode.

[0010] Preferably, the mode selection unit includes: a temperature reduction determination unit, configured to determine that the temperature control operation is a temperature reduction operation when the abnormal temperature value is greater than the temperature range; The temperature increase determination unit is used to determine that the temperature control operation is a temperature increase operation when the abnormal temperature value is less than the temperature range.

[0011] Preferably, the temperature control module comprises: A value determination unit, configured to determine a control parameter type based on a target temperature control mode, select a data table corresponding to the target temperature control mode, and obtain a control value corresponding to the temperature difference and the control parameter type from the data table; A parameter determination unit, configured to obtain a control parameter based on a control value corresponding to a control parameter type; The control unit is used to determine a control instruction for controlling the temperature of the die-casting mold based on the control parameter, and to control the temperature of the die-casting mold according to the control instruction.

[0012] Preferably, it also includes a data monitoring module for monitoring the temperature control process; The data monitoring module comprises: A data acquisition unit is used to obtain the temperature change value of the temperature sensor during the temperature control process; A data comparison unit, used to compare the temperature change value with the theoretical change trend to obtain a change difference; The parameter adjustment unit is used to determine whether the change difference is greater than a preset difference. If so, it is determined that the control parameter is adjusted; otherwise, it is determined that the temperature control process is normal.

[0013] Preferably, the parameter adjustment unit comprises: An adjustment unit, configured to determine an initial adjustment range based on the value of the change difference, and determine a latest control parameter of the control parameter adjusted according to the initial adjustment range; The safety judgment unit is used to perform temperature control according to the latest control parameter when the latest control parameter meets the safety requirement, otherwise, perform a secondary adjustment on the latest control parameter.

[0014] A method for controlling a temperature control device of a die casting mold, comprising: S1: Based on the structural characteristics of the die-casting mold, determine the installation position of the temperature sensor on the die-casting mold, and install the temperature sensor at the installation position; S2: Based on the installation position, determine the temperature range of each temperature sensor, collect temperature data of the temperature sensor and compare it with the temperature range to obtain abnormal temperature values ​​and their corresponding installation positions; S3: Based on the abnormal temperature value and its corresponding installation position, a target temperature control method that meets the process requirements is selected from the temperature control method library; S4: Based on the target temperature control method and in combination with the temperature difference, the control parameters are determined, and the temperature of the die-casting mold is controlled according to the control parameters.

[0015] Compared with the prior art, the present invention has achieved the following beneficial effects: Based on the structural characteristics of the die-casting mold, the installation position of the temperature sensor on the die-casting mold is determined, and the temperature sensor is installed at the installation position to ensure accurate monitoring of the mold temperature. Based on the installation position, the temperature range of each temperature sensor is determined, and the temperature data of the temperature sensor is collected and compared with the temperature range to obtain abnormal temperature values ​​and their corresponding installation positions. Based on the abnormal temperature values ​​and their corresponding installation positions, a target temperature control method that meets the process requirements is selected from the temperature control method library. Based on the target temperature control method, the control parameters are determined in combination with the temperature difference. The temperature of the die-casting mold is controlled according to the control parameters to achieve temperature stability and accuracy of the die-casting mold during the production of the wheel hub, thereby ensuring the stability of the mold and the quality of the wheel hub during the production process.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a structural diagram of a temperature control device for a die-casting mold in an embodiment of the present invention; Figure 2 is a structural diagram of the temperature acquisition module described in an embodiment of the present invention; Figure 3 The figure is a flow chart of a method for controlling temperature of a die-casting mold in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] Embodiment 1: The embodiment of the present invention provides a temperature control device for a die casting mold, such as Figure 1 As shown, including: A position determination module, used for determining an installation position of a temperature sensor on the die-casting mold based on structural features of the die-casting mold, and installing the temperature sensor at the installation position; The temperature acquisition module is used to determine the temperature range of each temperature sensor based on the installation position, collect the temperature data of the temperature sensor and compare it with the temperature range, and obtain the abnormal temperature value and its corresponding installation position; A mode determination module is used to select a target temperature control mode that meets the process requirements from a temperature control mode library based on the abnormal temperature value and its corresponding installation position; The temperature control module is used to determine the control parameters based on the target temperature control method and the temperature difference, and to control the temperature of the die-casting mold according to the control parameters.

[0021] In this embodiment, the installation positions include the inlet, runner, cavity and cooling system of the die casting mold; ‌Mold inlet‌: Installing a temperature sensor at the inlet of the mold can monitor the temperature of the metal liquid in real time to ensure that it reaches an appropriate temperature before entering the mold to avoid affecting the molding quality due to too low or too high temperature‌; ‌Runner‌: The runner is the main channel for the flow of metal liquid. Installing a temperature sensor can monitor the temperature change in the runner to ensure that the metal liquid is evenly heated in the runner to avoid local overheating or uneven cooling; ‌Cavity‌: The cavity is where the metal liquid is finally formed. Installing a temperature sensor can monitor the temperature changes in the cavity, ensure the temperature in the cavity is stable, and avoid affecting the molding quality due to temperature fluctuations. ‌Cooling system‌: Installing a temperature sensor in the cooling system can monitor the temperature of the cooling medium, ensure the normal operation of the cooling system, and avoid affecting the service life and molding quality of the mold due to insufficient or excessive cooling.

[0022] In this embodiment, different installation positions correspond to different die-casting mold positions, and different temperature ranges are set.

[0023] In this embodiment, the temperature control method library includes using circulating cooling water cooling to control the mold temperature, using point cooling to control the mold temperature, using an oil heating device to control the mold temperature, controlling the spraying time and spraying amount, controlling the mold temperature, controlling the mold retention time to affect the mold temperature, controlling the alloy temperature to affect the mold temperature, etc.

[0024] In this embodiment, the control parameters include control time, alloy temperature, heating device temperature, etc., and the type of control parameters is determined according to the selected target temperature control method.

[0025] The beneficial effects of the above design scheme are: by determining the installation position of the temperature sensor on the die-casting mold based on the structural characteristics of the die-casting mold, and installing the temperature sensor at the installation position to ensure accurate monitoring of the mold temperature, by determining the temperature range of each temperature sensor based on the installation position, and collecting the temperature data of the temperature sensor for comparison with the temperature range, obtaining the abnormal temperature value and its corresponding installation position, based on the abnormal temperature value and its corresponding installation position, selecting the target temperature control method that meets the process requirements from the temperature control method library, based on the target temperature control method, combining the temperature difference, determining the control parameters, and controlling the temperature of the die-casting mold according to the control parameters, so as to achieve the temperature stability and accuracy of the die-casting mold during the production of the wheel hub, thereby ensuring the stability of the mold and the quality of the wheel hub during the production process.

[0026] Embodiment 2: Based on Example 1, an embodiment of the present invention provides a die-casting mold temperature control device, wherein the position determination module comprises: A feature acquisition unit, for obtaining a mold inlet shape, a flow channel shape, a cavity shape and a cooling system shape, and a mold inlet size, a flow channel length, a cavity surface area and a cooling system size based on structural features of the die-casting mold; An object determination unit, used to set an initial number of temperature sensors based on mold inlet size, runner length, cavity surface area, and cooling system size, and obtain temperature monitoring objects for the mold inlet, runner, cavity, and cooling system; a weight determination unit, configured to determine a first influence weight based on a stable temperature range of a temperature monitoring object, determine a second influence weight based on an influence of the temperature monitoring object on process quality, and determine a comprehensive influence weight on the temperature monitoring object based on the first influence weight and the second influence weight; a quantity determination unit, configured to perform weighted processing on an initial quantity of temperature sensors based on a difference between the comprehensive influence weight and the standard influence weight to obtain a target quantity; A position determination unit is used to determine the key positions of the mold inlet, runner, cavity and cooling system based on the mold inlet shape, runner shape, cavity shape and cooling system shape, and to distribute the positions of the temperature sensors based on the key positions and the target number to obtain the installation positions of the temperature sensors; The installation unit is used to determine an installation method based on the structural characteristics of the installation position, and install the temperature sensor at the installation position according to the installation method.

[0027] In this embodiment, the temperature monitoring objects of the mold inlet, runner, cavity and cooling system are respectively the metal liquid, the temperature change in the runner, the temperature change in the cavity and the temperature of the cooling medium.

[0028] In this embodiment, the smaller the stable temperature range is, the larger the corresponding first influence weight is, and the greater the influence of the temperature monitoring object on the process quality is, the larger the second influence weight is.

[0029] In this embodiment, the standard influence weight is pre-designed, and the greater the difference between the comprehensive influence weight and the standard influence weight, the greater the adjustment range of the initial quantity.

[0030] In this embodiment, the installation method is, for example, hanging.

[0031] The beneficial effect of the above design scheme is: by considering the structural characteristics of the die-casting mold, the mold inlet shape, flow channel shape, cavity shape and cooling system shape, and the mold inlet size, flow channel length, cavity surface area and cooling system size are obtained to determine the number and installation positions of the temperature sensors, ensure the rationality of the position and number of the obtained temperature sensors, and realize accurate monitoring of the mold temperature, providing an accurate temperature monitoring basis for the temperature control of the casting mold.

[0032] Embodiment 3: Based on Example 2, an embodiment of the present invention provides a die-casting mold temperature control device, wherein the position determination unit includes: A position acquisition unit, used for determining the center position of the mold inlet, runner, cavity and cooling system based on the mold inlet shape, runner shape, cavity shape and cooling system shape, and searching based on the center position to obtain the key position based on the processing features of the mold inlet, runner, cavity and cooling system; The parameter acquisition unit is used to determine the position, direction and distance based on the mold inlet shape, runner shape, cavity shape and cooling system shape, combined with the target quantity, and obtain the installation position of the temperature sensor based on the position, direction and distance, and the key position is used as a reference.

[0033] The beneficial effects of the above design scheme are: by determining the center position of the mold inlet, runner, cavity and cooling system based on the mold inlet shape, runner shape, cavity shape and cooling system shape, and based on the processing characteristics of the mold inlet, runner, cavity and cooling system, searching based on the center position to obtain the key position, based on the mold inlet shape, runner shape, cavity shape and cooling system shape, combined with the target quantity, determining the position, direction and distance, based on the position, determining the direction and distance, using the key position as a reference, obtaining the installation position of the temperature sensor, and ensuring the rationality of the obtained installation position of the temperature sensor.

[0034] Embodiment 4: Based on Example 1, the present invention provides a temperature control device for a die casting mold, such as Figure 2 As shown, the temperature acquisition module includes: A range determination unit for setting a temperature range for each temperature sensor based on the installation location of the temperature sensor in the mold inlet, runner, cavity and cooling system; A collection unit, used to collect the temperature of each position of the die-casting mold based on a temperature sensor to obtain temperature data; The comparison unit is used to compare the temperature data with the temperature range, obtain an abnormal temperature value corresponding to the temperature data not within the temperature range, and determine an installation position corresponding to the abnormal temperature value based on a temperature sensor of the abnormal temperature value.

[0035] The beneficial effect of the above design scheme is: by determining the temperature range of each temperature sensor based on the installation position, and collecting the temperature data of the temperature sensor and comparing it with the temperature range, the abnormal temperature value and its corresponding installation position are obtained, providing a basis for further temperature control.

[0036] Embodiment 5: Based on Example 1, an embodiment of the present invention provides a die-casting mold temperature control device, wherein the mode determination module includes: A method selection unit, used to determine a temperature control object based on an installation position corresponding to an abnormal temperature value, and select a primary temperature control method that satisfies the temperature control object from a temperature control method library; The mode selection unit is further used to determine whether the temperature control operation is a cooling operation or a heating operation based on the relationship between the abnormal temperature value and the temperature range, and select an alternative temperature control mode that satisfies the temperature control operation based on the primary temperature control mode; A mode analysis unit, used for obtaining an action object and an action parameter type of each alternative temperature control mode, determining a control complexity based on the action object, determining a control time length based on the action parameter type, and determining a temperature control cost based on the action object and the action parameter type; A process analysis unit, for determining a process time requirement and a process difficulty constraint based on process requirements, evaluating control complexity based on the process difficulty constraint, selecting a first temperature control method that meets the process difficulty constraint from alternative temperature control methods, evaluating a control time length based on the process time requirement, selecting a second temperature control method that meets the process time requirement from alternative temperature control methods, and selecting a third temperature control method that meets both the first temperature control method and the second temperature control method; The mode determination unit is used to select a temperature control mode with the lowest temperature control cost from the third temperature control modes as a target temperature control mode.

[0037] In this embodiment, the object of action is, for example, a die-casting mold, alloy temperature, a spraying object, etc.

[0038] In this embodiment, the action parameter types include, for example, cooling with cooling water, heating with a heating device, controlling the spraying time and the spraying amount, and the like.

[0039] The beneficial effect of the above design scheme is: by selecting the temperature control method layer by layer based on the temperature control object, the relationship between the abnormal temperature value and the temperature range, the process requirements and the cost requirements, it is ensured that the selected target temperature control method is the best choice in terms of control accuracy, control time and control cost, providing a theoretical basis for the actual operation of temperature control.

[0040] Embodiment 6: Based on Example 5, an embodiment of the present invention provides a die-casting mold temperature control device, wherein the mode selection unit includes: a temperature reduction determination unit, configured to determine that the temperature control operation is a temperature reduction operation when the abnormal temperature value is greater than the temperature range; The temperature increase determination unit is used to determine that the temperature control operation is a temperature increase operation when the abnormal temperature value is less than the temperature range.

[0041] The beneficial effect of the above design scheme is: when the abnormal temperature value is greater than the temperature range, the temperature control operation is determined to be a cooling operation, and when the abnormal temperature value is less than the temperature range, the temperature control operation is determined to be a heating operation, thereby providing a basis for selecting the temperature control method.

[0042] Embodiment 7: Based on Example 1, the embodiment of the present invention provides a temperature control device for a die casting mold, wherein the temperature control module comprises: A value determination unit, configured to determine a control parameter type based on a target temperature control mode, select a data table corresponding to the target temperature control mode, and obtain a control value corresponding to the temperature difference and the control parameter type from the data table; A parameter determination unit, configured to obtain a control parameter based on a control value corresponding to a control parameter type; The control unit is used to determine a control instruction for controlling the temperature of the die-casting mold based on the control parameter, and to control the temperature of the die-casting mold according to the control instruction.

[0043] The beneficial effect of the above design scheme is: by determining the control parameter type based on the target temperature control method, selecting the data table corresponding to the target temperature control method, obtaining the control value corresponding to the temperature difference and the control parameter type from the data table, and obtaining the control parameter based on the control value corresponding to the control parameter type, and determining the control instruction for the temperature control of the die-casting mold based on the control parameter, and controlling the temperature of the die-casting mold according to the control instruction, so as to achieve the temperature stability and accuracy of the die-casting mold in the process of producing the wheel hub, thereby ensuring the stability of the mold and the quality of the wheel hub during the production process.

[0044] Embodiment 8: Based on Example 7, the embodiment of the present invention provides a die-casting mold temperature control device, further comprising a data monitoring module for monitoring the temperature control process; The data monitoring module comprises: A data acquisition unit is used to obtain the temperature change value of the temperature sensor during the temperature control process; A data comparison unit, used to compare the temperature change value with the theoretical change trend to obtain a change difference; The parameter adjustment unit is used to determine whether the change difference is greater than a preset difference. If so, it is determined that the control parameter is adjusted; otherwise, it is determined that the temperature control process is normal.

[0045] The beneficial effects of the above design scheme are: by obtaining the temperature change value of the temperature sensor during the temperature control process; comparing the temperature change value with the theoretical change trend to obtain the change difference, and judging whether the change difference is greater than the preset difference, if so, determining to adjust the control parameters, otherwise, determining that the temperature control process is normal, and monitoring and adjusting the temperature control in Xi'an to ensure the accuracy of the temperature control of the die-casting mold in real time.

[0046] Embodiment 9: Based on Example 8, an embodiment of the present invention provides a die-casting mold temperature control device, wherein the parameter adjustment unit includes: An adjustment unit, configured to determine an initial adjustment range based on the value of the change difference, and determine a latest control parameter of the control parameter adjusted according to the initial adjustment range; The safety judgment unit is used to perform temperature control according to the latest control parameter when the latest control parameter meets the safety requirement, otherwise, perform a secondary adjustment on the latest control parameter.

[0047] The beneficial effects of the above design scheme are: by determining the initial adjustment range based on the value of the change difference, determining the latest control parameter of the control parameter adjusted according to the initial adjustment range; when the latest control parameter meets the safety requirements, temperature control is performed according to the latest control parameter, otherwise, the latest control parameter is adjusted for a second time, thereby ensuring the safety and accuracy of parameter adjustment.

[0048] Embodiment 10: Based on Example 1, the present invention provides a method for controlling a temperature control device for a die casting mold, such as Figure 3 As shown, including: S1: Based on the structural characteristics of the die-casting mold, determine the installation position of the temperature sensor on the die-casting mold, and install the temperature sensor at the installation position; S2: Based on the installation position, determine the temperature range of each temperature sensor, collect temperature data of the temperature sensor and compare it with the temperature range to obtain abnormal temperature values ​​and their corresponding installation positions; S3: Based on the abnormal temperature value and its corresponding installation position, a target temperature control method that meets the process requirements is selected from the temperature control method library; S4: Based on the target temperature control method and in combination with the temperature difference, the control parameters are determined, and the temperature of the die-casting mold is controlled according to the control parameters.

[0049] In this embodiment, the installation positions include the inlet, runner, cavity and cooling system of the die casting mold; ‌Mold inlet‌: Installing a temperature sensor at the inlet of the mold can monitor the temperature of the metal liquid in real time to ensure that it reaches an appropriate temperature before entering the mold to avoid affecting the molding quality due to too low or too high temperature‌; ‌Runner‌: The runner is the main channel for the flow of metal liquid. Installing a temperature sensor can monitor the temperature change in the runner to ensure that the metal liquid is evenly heated in the runner to avoid local overheating or uneven cooling; ‌Cavity‌: The cavity is where the metal liquid is finally formed. Installing a temperature sensor can monitor the temperature changes in the cavity, ensure the temperature in the cavity is stable, and avoid affecting the molding quality due to temperature fluctuations. ‌Cooling system‌: Installing a temperature sensor in the cooling system can monitor the temperature of the cooling medium, ensure the normal operation of the cooling system, and avoid affecting the service life and molding quality of the mold due to insufficient or excessive cooling.

[0050] In this embodiment, different installation positions correspond to different die-casting mold positions, and different temperature ranges are set.

[0051] In this embodiment, the temperature control method library includes using circulating cooling water cooling to control the mold temperature, using point cooling to control the mold temperature, using an oil heating device to control the mold temperature, controlling the spraying time and spraying amount, controlling the mold temperature, controlling the mold retention time to affect the mold temperature, controlling the alloy temperature to affect the mold temperature, etc.

[0052] In this embodiment, the control parameters include control time, alloy temperature, heating device temperature, etc., and the type of control parameters is determined according to the selected target temperature control method.

[0053] The beneficial effects of the above design scheme are: by determining the installation position of the temperature sensor on the die-casting mold based on the structural characteristics of the die-casting mold, and installing the temperature sensor at the installation position to ensure accurate monitoring of the mold temperature, by determining the temperature range of each temperature sensor based on the installation position, and collecting the temperature data of the temperature sensor for comparison with the temperature range, obtaining the abnormal temperature value and its corresponding installation position, based on the abnormal temperature value and its corresponding installation position, selecting the target temperature control method that meets the process requirements from the temperature control method library, based on the target temperature control method, combining the temperature difference, determining the control parameters, and controlling the temperature of the die-casting mold according to the control parameters, so as to achieve the temperature stability and accuracy of the die-casting mold during the production of the wheel hub, thereby ensuring the stability of the mold and the quality of the wheel hub during the production process.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention belong to the scope of this application document and its equivalent technology, the present invention is also intended to include these changes and variations.

Claims

1. A die casting mold temperature control device, characterized in that: include: A position determination module, used for determining an installation position of a temperature sensor on the die-casting mold based on structural features of the die-casting mold, and installing the temperature sensor at the installation position; The temperature acquisition module is used to determine the temperature range of each temperature sensor based on the installation position, collect the temperature data of the temperature sensor and compare it with the temperature range, and obtain the abnormal temperature value and its corresponding installation position; A mode determination module is used to select a target temperature control mode that meets the process requirements from a temperature control mode library based on the abnormal temperature value and its corresponding installation position; The temperature control module is used to determine the control parameters based on the target temperature control method and the temperature difference, and to control the temperature of the die-casting mold according to the control parameters.

2. A die-casting mold temperature control device according to claim 1, characterized in that: The position determination module comprises: A feature acquisition unit, for obtaining a mold inlet shape, a flow channel shape, a cavity shape and a cooling system shape, and a mold inlet size, a flow channel length, a cavity surface area and a cooling system size based on structural features of the die-casting mold; An object determination unit, used to set an initial number of temperature sensors based on mold inlet size, runner length, cavity surface area, and cooling system size, and obtain temperature monitoring objects for the mold inlet, runner, cavity, and cooling system; a weight determination unit, configured to determine a first influence weight based on a stable temperature range of a temperature monitoring object, determine a second influence weight based on an influence of the temperature monitoring object on process quality, and determine a comprehensive influence weight on the temperature monitoring object based on the first influence weight and the second influence weight; a quantity determination unit, configured to perform weighted processing on an initial quantity of temperature sensors based on a difference between the comprehensive influence weight and the standard influence weight to obtain a target quantity; A position determination unit is used to determine the key positions of the mold inlet, runner, cavity and cooling system based on the mold inlet shape, runner shape, cavity shape and cooling system shape, and to distribute the positions of the temperature sensors based on the key positions and the target number to obtain the installation positions of the temperature sensors; The installation unit is used to determine an installation method based on the structural characteristics of the installation position, and install the temperature sensor at the installation position according to the installation method.

3. A die-casting mold temperature control device according to claim 2, characterized in that: The position determination unit comprises: A position acquisition unit, used for determining the center position of the mold inlet, runner, cavity and cooling system based on the mold inlet shape, runner shape, cavity shape and cooling system shape, and searching based on the center position to obtain the key position based on the processing features of the mold inlet, runner, cavity and cooling system; The parameter acquisition unit is used to determine the position, direction and distance based on the mold inlet shape, runner shape, cavity shape and cooling system shape, combined with the target quantity, and obtain the installation position of the temperature sensor based on the position, direction and distance, and the key position is used as a reference.

4. A die-casting mold temperature control device according to claim 1, characterized in that: The temperature acquisition module comprises: A range determination unit for setting a temperature range for each temperature sensor based on the installation location of the temperature sensor in the mold inlet, runner, cavity and cooling system; A collection unit, used to collect the temperature of each position of the die-casting mold based on a temperature sensor to obtain temperature data; The comparison unit is used to compare the temperature data with the temperature range, obtain an abnormal temperature value corresponding to the temperature data not within the temperature range, and determine an installation position corresponding to the abnormal temperature value based on a temperature sensor of the abnormal temperature value.

5. The die-casting mold temperature control device according to claim 1, characterized in that: The method determines the module, including: A method selection unit, used to determine a temperature control object based on an installation position corresponding to an abnormal temperature value, and select a primary temperature control method that satisfies the temperature control object from a temperature control method library; The mode selection unit is further used to determine whether the temperature control operation is a cooling operation or a heating operation based on the relationship between the abnormal temperature value and the temperature range, and select an alternative temperature control mode that satisfies the temperature control operation based on the primary temperature control mode; A mode analysis unit, used for obtaining an action object and an action parameter type of each alternative temperature control mode, determining a control complexity based on the action object, determining a control time length based on the action parameter type, and determining a temperature control cost based on the action object and the action parameter type; A process analysis unit, for determining a process time requirement and a process difficulty constraint based on process requirements, evaluating control complexity based on the process difficulty constraint, selecting a first temperature control method that meets the process difficulty constraint from alternative temperature control methods, evaluating a control time length based on the process time requirement, selecting a second temperature control method that meets the process time requirement from alternative temperature control methods, and selecting a third temperature control method that meets both the first temperature control method and the second temperature control method; The mode determination unit is used to select a temperature control mode with the lowest temperature control cost from the third temperature control modes as a target temperature control mode.

6. A die casting mold temperature control device according to claim 5, characterized in that: The mode selection unit includes: a temperature reduction determination unit, configured to determine that the temperature control operation is a temperature reduction operation when the abnormal temperature value is greater than the temperature range; The temperature increase determination unit is used to determine that the temperature control operation is a temperature increase operation when the abnormal temperature value is less than the temperature range.

7. A die-casting mold temperature control device according to claim 1, characterized in that: The temperature control module comprises: A value determination unit, configured to determine a control parameter type based on a target temperature control mode, select a data table corresponding to the target temperature control mode, and obtain a control value corresponding to the temperature difference and the control parameter type from the data table; A parameter determination unit, configured to obtain a control parameter based on a control value corresponding to a control parameter type; The control unit is used to determine a control instruction for controlling the temperature of the die-casting mold based on the control parameter, and to control the temperature of the die-casting mold according to the control instruction.

8. A die-casting mold temperature control device according to claim 7, characterized in that: Also included is a data monitoring module for monitoring the temperature control process; The data monitoring module comprises: A data acquisition unit is used to obtain the temperature change value of the temperature sensor during the temperature control process; A data comparison unit, used to compare the temperature change value with the theoretical change trend to obtain a change difference; The parameter adjustment unit is used to determine whether the change difference is greater than a preset difference. If so, it is determined that the control parameter is adjusted; otherwise, it is determined that the temperature control process is normal.

9. A die-casting mold temperature control device according to claim 8, characterized in that: The parameter adjustment unit comprises: An adjustment unit, configured to determine an initial adjustment range based on the value of the change difference, and determine a latest control parameter of the control parameter adjusted according to the initial adjustment range; The safety judgment unit is used to perform temperature control according to the latest control parameter when the latest control parameter meets the safety requirement, otherwise, perform a secondary adjustment on the latest control parameter.

10. The control method of a die-casting mold temperature control device according to claim 1, characterized in that: include: S1: Based on the structural characteristics of the die-casting mold, determine the installation position of the temperature sensor on the die-casting mold, and install the temperature sensor at the installation position; S2: Based on the installation position, determine the temperature range of each temperature sensor, collect temperature data of the temperature sensor and compare it with the temperature range to obtain abnormal temperature values ​​and their corresponding installation positions; S3: Based on the abnormal temperature value and its corresponding installation position, a target temperature control method that meets the process requirements is selected from the temperature control method library; S4: Based on the target temperature control method and in combination with the temperature difference, the control parameters are determined, and the temperature of the die-casting mold is controlled according to the control parameters.

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