CN113985936B - Casting control Wen Dingzhen and temperature control method thereof - Google Patents
Casting control Wen Dingzhen and temperature control method thereof Download PDFInfo
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- CN113985936B CN113985936B CN202111142408.9A CN202111142408A CN113985936B CN 113985936 B CN113985936 B CN 113985936B CN 202111142408 A CN202111142408 A CN 202111142408A CN 113985936 B CN113985936 B CN 113985936B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The application discloses a temperature control thimble for casting, which comprises a plurality of thimble bodies arranged on a casting mold, wherein the thimble bodies are used for ejecting a workpiece formed in the casting mold, a cavity is arranged in the thimble bodies, a temperature control pipeline is arranged in the cavity, high-temperature resistant medium flows in the temperature control pipeline, the temperature control pipeline is communicated with a circulating pump and a temperature regulating device outside the casting mold to form a temperature control loop, and the temperature control loop is suitable for carrying out temperature regulation on the thimble bodies in real time so as to carry out temperature regulation on the casting mold. The application has the beneficial effects that: compared with the traditional thimble body which has only an ejection function, the temperature control pipeline is arranged in the thimble body to heat and cool the casting mould, so that the functions of the thimble body can be diversified, and meanwhile, the strength and the service life of the casting mould are not influenced.
Description
Technical Field
The application relates to the technical field of dies, in particular to a temperature control thimble for casting.
Background
The casting is a method for pouring liquid metal into a cavity of a casting mold matched with the shape of a part, and obtaining the part or blank after the liquid metal is cooled and solidified, and is widely applied to the metal manufacturing industry.
When casting is performed by adopting a casting mold such as gravity, low pressure, high pressure, extrusion and the like, if the casting mold is directly contacted with high-temperature liquid metal in a cold state, the surface of the casting mold is easy to be rapidly heated to generate alternating thermal stress, and the casting mold can be aged prematurely. Meanwhile, the liquid metal is easy to cause excessively rapid condensation when encountering a cold casting mould, so that the defect of insufficient casting and forming is formed; in the casting process, the part of the mould at the thick and large part of the casting needs to be rapidly cooled so as to prevent the defects of shrinkage cavity, shrinkage porosity and the like.
In order to solve the problems in the prior art, a heating device is generally added or a heating loop is arranged in the die, but the strength and the service life of the casting die are reduced; the space in practical designs is limited and separate arrangements of heating and cooling devices are often not possible. There is a need for an apparatus or method for heating and cooling a casting mold that ensures the strength and life of the casting mold.
Disclosure of Invention
The application aims to provide a casting control Wen Dingzhen, which is used for controlling the temperature of a casting mould through a thimble, so that the influence on the strength and the service life of the casting mould is effectively reduced.
In order to achieve the purpose, the application adopts the following technical scheme: the temperature control thimble for casting comprises a plurality of thimble bodies arranged on a casting mould, wherein the thimble bodies are used for ejecting a workpiece formed in the casting mould; the ejector pin is characterized in that a cavity is formed in the ejector pin body, a port of the cavity is connected with a temperature control pipeline, a high-temperature resistant medium circulates in the temperature control pipeline, and a temperature control loop is formed by the temperature control pipeline and a circulating pump outside the casting die and a temperature adjusting device, and is suitable for real-time temperature adjustment of the ejector pin body, so that the casting die can be temperature-adjusted.
Preferably, the thimble bodies are uniformly arranged in a plurality of rows at intervals, so that the stress is uniform when the thimble bodies eject out of a workpiece, and the temperature of the casting mold is uniformly regulated.
Preferably, the plurality of thimble bodies are arranged in a circumferential mode, so that the stress is uniform when the thimble bodies eject out a workpiece, and the temperature of the casting mold is regulated uniformly.
Preferably, the temperature adjusting device comprises a heater and a cooler, wherein the heater is used for heating the high-temperature-resistant medium in the temperature control pipeline, and the cooler is used for cooling the high-temperature-resistant medium in the temperature control pipeline; thereby realizing the adjustment of the temperature control loop.
Preferably, a temperature control system is further installed outside the thimble body, the temperature control system comprises a plurality of temperature sensors, a processing module and a control module, the temperature sensors are mutually independent and correspondingly installed on the side walls of the cavities, the temperature sensors are used for detecting the temperature of the casting mold, the processing module is respectively and electrically connected with the temperature sensors and the control module, the control module is further electrically connected with the heater and the cooler, and the processing module is suitable for sending control signals to the control module according to detection signals of the temperature sensors, so that the temperature regulation of the temperature control loop can be realized through controlling the heater and the cooler.
Preferably, the control module is further electrically connected with the circulating pump, and the processing module is further adapted to send a control signal to the control module according to the detection signal of the temperature sensor, so as to regulate the temperature of the temperature control loop by controlling the flow or the flow rate of the circulating pump.
A temperature control method of a temperature control thimble comprises the following temperature control steps:
s100: temperature T in the casting mold in the vicinity of each thimble body is detected by a temperature sensor 1 、T 2 、……、T N Wherein, N represents the number of the thimble bodies and transmits the detected temperature signal to the control module;
s200: the processing module is used for processing the temperature signal according to the received temperature signal and the set working temperature T 0 In contrast, if the temperature of only one region or a plurality of non-adjacent regions is lower than the operating temperature T 0 When the temperature of the heater is lower than the working temperature T, the processing module sends a control signal to the control module to enable the control module to control the heater to be controlled to be lower than the working temperature T 0 Heating is carried out by a temperature control loop of the device; if the temperature of only one region or of a plurality of non-adjacent regions is higher than the operating temperature T 0 When the temperature of the cooler is higher than the working temperature T, the processing module sends a control signal to the control module to enable the control module to control the cooler to be at the temperature higher than the working temperature T 0 Is cooled by a temperature control loop; if there are several adjacent areas with a temperature lower or higher than the operating temperature T 0 When the method is used, the next step is carried out;
s300: the processing module arranges the temperatures of a plurality of adjacent areas from high to low; when the temperatures of a plurality of adjacent areas are lower than the working temperature T 0 When the temperature of the heater is lower than the working temperature T, the control module controls the heater to be controlled 0 The temperature control loop of the heater is heated, and the heating power is from low to high according to the arrangement so as to realize gradient heating, thereby reducing the energy consumption of the heater; when the temperatures of a plurality of adjacent areas are higher than the working temperature T 0 When the temperature of the cooler is higher than the working temperature T, the control module controls the cooler to be higher than the working temperature T 0 The temperature control loop of the heater is cooled, and the cooling power is increased from high to low according to the arrangement so as to realize gradient cooling, and the energy consumption of the heater can be reduced.
Preferably, the temperature control method of the temperature control thimble further comprises the following steps:
s210: when the temperature of only one region or a plurality of non-adjacent regions is higher than the working temperatureT 0 When the circulating pump is in a working state, the processing module sends a control signal to the control module so that the control module controls the circulating pump to reduce the temperature T higher than the working temperature T 0 The flow rate or the flow velocity of the temperature control loop; and when there are a plurality of adjacent areas, the temperature is higher than the working temperature T 0 When the method is used, the next step is carried out;
s310: the processing module arranges the temperatures of a plurality of adjacent areas from high to low, and the control module controls the circulating pump to reduce the temperature higher than the working temperature T 0 The flow rate or the flow velocity of the temperature control loop of (c) and the degree of decrease is from high to low according to the arrangement described above to achieve gradient control.
Compared with the prior art, the application has the beneficial effects that:
(1) Compared with the traditional thimble body which has only an ejection function, the temperature control pipeline is arranged in the thimble body to heat the casting mould, so that the functions of the thimble body can be diversified, and meanwhile, the strength and the service life of the casting mould are not influenced.
(2) The temperature sensor can be used for detecting the temperature of the additional area of each thimble body in the casting mold, so that the temperature of each area is regulated according to the detected temperature signals, the temperature of each area in the module body is ensured to always meet the casting requirement, and the yield of workpieces of the casting mold is improved.
Drawings
Fig. 1 is a schematic view of the mounting structure of the present application.
Fig. 2 is a schematic distribution diagram of one embodiment of the present application.
Fig. 3 is a schematic distribution diagram of another embodiment of the present application.
Fig. 4 is a schematic view of the internal structure of the present application.
Fig. 5 is a schematic of the workflow of the present application.
In the figure: casting mold 100, thimble body 2, cavity 200, temperature control pipeline 3, input pipeline 31, output pipeline 32, temperature control system 4, temperature sensor 41, processing module 42, control module 43, circulating pump 5, cooler 6, heater 7.
Detailed Description
The present application will be further described with reference to the following specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
In the description of the present application, it should be noted that, for the azimuth words such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present application that the device or element referred to must have a specific azimuth configuration and operation.
It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
In one aspect of the present application, as shown in fig. 1 to 5, a temperature control thimble for casting is provided, which includes a plurality of thimble bodies 2 mounted on a casting mold 100, wherein the thimble bodies 2 are mounted on the bottom of the casting mold 100, so that after the casting mold 100 completes the forming of a workpiece, the driving device drives the thimble bodies 2 to move upwards to eject the workpiece formed in the casting mold 100. Meanwhile, the cavity 200 is further formed in the thimble body 2, a port of the cavity 200 is located at the lower end of the thimble body 2 and is communicated with the temperature control pipeline 3, high-temperature resistant media can flow into the cavity 200 through the temperature control pipeline 3, a temperature adjusting device and a circulating pump 5 are arranged outside the casting mold 100, the temperature control pipeline 3, the temperature adjusting device and the circulating pump 5 are mutually communicated to form a temperature control loop in series, so that the temperature of the thimble body 2 can be adjusted in real time through the temperature control loop, and the temperature of a cavity of the casting mold 100 is adjusted.
It can be understood that the existing ejector pin body 2 is only used for demolding, and is not subjected to a large force during use, so that the cavity 200 arranged in the ejector pin body 2 does not affect the demolding function of the ejector pin body 2, and the temperature control of the casting mold 100 can be performed through the temperature control pipeline 3 arranged in the cavity 200, so that the ejector pin body 2 has various functions.
In this embodiment, in order to ensure the stability of the casting mold 100 in heating, it is often necessary to uniformly distribute the plurality of thimble bodies 2, so that the casting mold 100 is divided into regions by the positions of the thimble bodies 2, and the whole temperature adjustment of the casting mold 100 is realized by adjusting the temperature of the regions by the thimble bodies 2.
In this embodiment, as shown in fig. 2 and 3, the plurality of thimble bodies 2 may be divided into a plurality of groups, and the thimble bodies 2 of each group are uniformly distributed at intervals, and meanwhile, the groups are uniformly distributed at intervals, so that the plurality of thimble bodies 2 are orderly arranged into a plurality of rows, and therefore, when the thimble bodies 2 perform demolding of the workpiece, the stress is uniform, and meanwhile, the heating of the casting mold 100 is also uniform. The plurality of thimble bodies 2 can be arranged in a circumferential manner, and the stress is uniform when the thimble bodies 2 perform workpiece demoulding, and the heating of the casting mold 100 is uniform.
It can be understood that the specific number and arrangement manner of the thimble bodies 2 can be set according to actual needs, for example, as shown in fig. 2, the number of the thimble bodies 2 is eight, and the thimble bodies can be divided into three groups, wherein one group comprises two thimble bodies 2, the other two groups comprises three thimble bodies 2, the thimble bodies 2 of each group are uniformly distributed at intervals, and meanwhile, one group comprising two thimble bodies 2 is arranged between the two groups comprising three thimble bodies 2, so that the area of a heated area of the casting mold 100 corresponding to each thimble body 2 is approximate; this arrangement is more suitable for rectangular casting molds 100. For example, as shown in fig. 3, the number of the thimble bodies 2 is seven, one thimble body 2 is located in the middle of the casting mold 100, and the rest of the thimble bodies 2 are uniformly arranged circumferentially around the thimble body 2 located in the middle, so that the area of the heated area of the casting mold 100 corresponding to each thimble body 2 is similar; this arrangement is more suitable for a circular casting mold 100. It should be understood by those skilled in the art that the arrangement of the thimble body 2 includes, but is not limited to, the two sets of arrangements described above.
In this embodiment, as shown in fig. 4 and 5, the cavity 200 is U-shaped, so that the cavity 200 forms two ports at the lower end of the thimble body 2. Meanwhile, the temperature control pipeline 3 specifically comprises an input pipeline 31 and an output pipeline 32, one ends of the input pipeline 31 and the output pipeline 32 are respectively communicated with two ports of the cavity 200, the other ends of the input pipeline 31 and the output pipeline 32 are respectively communicated with the input end and the output end of the circulating pump 5, the temperature regulating device is communicated with the input pipeline 31, and the temperature regulating device, the circulating pump 5 and the cavity 200 of the thimble body 2 can be connected in series through the input pipeline 31 and the output pipeline 32 to form a temperature control loop. The high-temperature resistant medium passing through the temperature adjusting device can circularly flow along the temperature control loop through the circulating pump 5 so as to adjust the temperature of the thimble body 2, and further, the temperature of the casting mold 100 can be adjusted.
It can be understood that the internal cavity 200 of each thimble body 2 forms a temperature control circuit with the temperature adjusting device and the circulating pump 5 through the temperature control pipeline 3, that is, the plurality of thimble bodies 2 correspond to a plurality of mutually independent temperature control circuits.
In this embodiment, as shown in fig. 5, the temperature adjusting device specifically includes a heater 7 and a cooler 6, where the heater 7 is used to heat a high temperature resistant medium in the temperature control pipeline 3, the cooler 6 is used to cool down the high temperature resistant medium in the temperature control pipeline 3, and the heater 7 and the cooler 6 are respectively communicated with the input pipeline 31 through control valves, so that the conduction or the closing of the heater 7 and the cooler 6 and the input pipeline are respectively controlled through the control valves, and the temperature of the temperature control loop can be adjusted.
In one embodiment of the present application, as shown in fig. 5, a temperature control system 4 is further installed on the outside of the thimble body 2, the temperature control system includes a plurality of temperature sensors 41, a processing module 42 and a control module 43, and the number of the temperature sensors 41 is equal to that of the thimble body 2, so that the temperature sensors 41 are installed on the side walls of the cavities 200 respectively. The temperature sensor 41 is used for detecting the temperature of the heated area of the casting mold 100 where the corresponding thimble body 2 is located. The processing module 42 is electrically connected to the temperature sensor 41 and the control module 43, and the processing module 42 is configured to receive a temperature signal detected by the temperature sensor 41 and send a control signal to the control module 43 according to the detected temperature signal. The control module 43 is further electrically connected with the heater 7 and the cooler 6, so that the control module 43 controls the heater 7 or the cooler 6 according to the control signal to realize temperature adjustment of the temperature control loop, so as to ensure that the cavity temperature of the casting mold 100 meets the use requirement.
In this embodiment, as shown in fig. 5, the control module 43 is further electrically connected to the circulation pump 5, so that the control module 43 can also control the flow rate or the flow velocity of the circulation pump 5 according to the control signal of the processing module 42, thereby performing temperature adjustment on the temperature control circuit.
In another aspect of the present application, a temperature control method for a temperature control thimble is provided, which specifically includes the following temperature control steps:
s100: the temperature T in the casting mold 100 in the vicinity of each thimble body 2 is detected by the temperature sensor 41 1 、T 2 、……、T N Wherein N represents the number of thimble bodies 2 and transmits the detected temperature signal to the control module 43;
s200: the processing module 42 receives the temperature signal and the set operating temperature T 0 In contrast, if the temperature of only one region or a plurality of non-adjacent regions is lower than the operating temperature T 0 When the processing module 42 sends a control signal to the control module 43, so that the control module 43 controls the heater 7 to be lower than the working temperature T 0 Heating is carried out by a temperature control loop of the device; if the temperature of only one region or of a plurality of non-adjacent regions is higher than the operating temperature T 0 When the temperature control circuit is higher than the working temperature T0, the processing module 42 sends a control signal to the control module 43 so that the control module 43 controls the cooler 6 to cool the temperature control circuit; if there are several adjacent areas with a temperature lower or higher than the operating temperature T 0 When the method is used, the next step is carried out;
s300: the processing module 42 ranks the temperatures of the plurality of adjacent regions from high to low; when the temperatures of a plurality of adjacent areas are lower than the working temperature T 0 When the temperature of the heater 7 is lower than the working temperature T, the control module 43 controls 0 The temperature control circuit of the heater 7, and the heating power is from low to high according to the arrangement to realize gradient heating, so that the energy consumption of the heater 7 can be reduced; when the temperatures of a plurality of adjacent areas are higher than the working temperature T 0 The control module 43 controls the cooler 6 to be higher than the working temperature T 0 The temperature control circuit of (2) is cooled and the cooling power is increased from high to low according to the arrangement to realize gradient cooling, and the energy consumption of the heater 7 can be reduced.
It can be understood that when the temperatures of the adjacent areas are adjusted, the temperatures of the adjacent areas can be mutually influenced through heat conduction, so that when the temperature is raised, the maximum heating power can be provided for the lowest area in the adjacent temperature areas, so that the temperature in the adjacent areas can be raised to a certain extent in the process of raising the temperature, the heating power of the adjacent areas can be properly reduced, gradient temperature raising is realized, and the consumption of energy is reduced to save resources and cost. The same holds true for the cooling process.
In this embodiment, the temperature control method of the temperature control thimble further includes the following steps:
s210: when the temperature of only one region or a plurality of non-adjacent regions is higher than the working temperature T 0 When the processing module 42 sends a control signal to the control module 43, so that the control module 43 controls the circulating pump 5 to reduce the temperature higher than the working temperature T 0 The flow rate or the flow velocity of the temperature control loop; and when there are a plurality of adjacent areas, the temperature is higher than the working temperature T 0 When the method is used, the next step is carried out;
s310: the processing module 42 arranges the temperatures of a plurality of adjacent areas from high to low, and the control module 43 controls the circulating pump 5 to reduce the temperature above the working temperature T 0 Flow or velocity of the temperature control loop of (a) and decreaseThe degree of (2) is from high to low according to the arrangement described above to achieve gradient control.
It is understood that the temperature rising process mainly depends on the temperature of the high temperature resistant medium, so that the increase in the flow rate or flow velocity by the circulation pump 5 does not greatly affect the temperature rising at the time of the temperature rising adjustment. And for the cooling process, the temperature of the high-temperature resistant medium is not only dependent, but also dependent on the amount of the high-temperature resistant medium, so that the cooling adjustment can be realized by controlling the flow or the flow velocity of the high-temperature resistant medium in the temperature control pipeline 3 through the circulating pump 5 during the cooling adjustment.
The foregoing has outlined the basic principles, features, and advantages of the present application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (5)
1. The temperature control method of the temperature control thimble for casting comprises a plurality of thimble bodies arranged on a casting mold, wherein the thimble bodies are used for ejecting a workpiece molded in the casting mold, and the temperature control method is characterized in that: the temperature control pipeline is communicated with the circulating pump and the temperature regulating device to form a temperature control loop, and the temperature control loop is suitable for carrying out temperature regulation on the thimble body in real time, so that the casting mould can be subjected to temperature regulation;
the temperature regulating device comprises a heater and a cooler, wherein the heater is used for heating the high-temperature-resistant medium in the temperature control pipeline, and the cooler is used for cooling the high-temperature-resistant medium in the temperature control pipeline;
the temperature control system is further arranged outside the thimble body and comprises a plurality of temperature sensors, a processing module and a control module, wherein the temperature sensors are mutually independent and correspondingly arranged on the side wall of the cavity, the temperature sensors are used for detecting the temperature of the casting mould, the processing module is respectively and electrically connected with the temperature sensors and the control module, the control module is further electrically connected with the temperature adjusting device, and the processing module is suitable for sending control signals to the control module according to detection signals of the temperature sensors so that the control module can carry out temperature adjustment on the temperature control loop by controlling the temperature adjusting device;
the temperature control method comprises the following steps:
s100: temperature T in the casting mold in the vicinity of each thimble body is detected by a temperature sensor 1 、T 2 、……、T N Transmitting the detected temperature signal to a control module;
s200: the processing module is used for processing the temperature signal according to the received temperature signal and the set working temperature T 0 In contrast, if the temperature of only one region or a plurality of non-adjacent regions is lower than the operating temperature T 0 When the temperature of the heater is lower than the working temperature T, the processing module sends a control signal to the control module to enable the control module to control the heater to be controlled to be lower than the working temperature T 0 Heating is carried out by a temperature control loop of the device; if the temperature of only one region or of a plurality of non-adjacent regions is higher than the operating temperature T 0 When the temperature of the cooler is higher than the working temperature T, the processing module sends a control signal to the control module to enable the control module to control the cooler to be at the temperature higher than the working temperature T 0 Is cooled by a temperature control loop; if there are several adjacent areas with a temperature lower or higher than the operating temperature T 0 When the method is used, the next step is carried out;
s300: the processing module arranges the temperatures of a plurality of adjacent areas from high to low; when the temperatures of a plurality of adjacent areas are lower than the working temperature T 0 When the temperature of the heater is lower than the working temperature T, the control module controls the heater to be controlled 0 The temperature control loop of the device is heated, and the heating power is from low to high according to the arrangement so as to realize gradient heating; when a plurality of adjacent areasThe temperature of the domains is higher than the working temperature T 0 When the temperature of the cooler is higher than the working temperature T, the control module controls the cooler to be higher than the working temperature T 0 The temperature control circuit of (2) is cooled, and the cooling power is from high to low according to the arrangement so as to realize gradient cooling.
2. The temperature control method of the temperature control thimble for casting according to claim 1, wherein: the thimble bodies are uniformly arranged in a plurality of rows at intervals.
3. The temperature control method of the temperature control thimble for casting according to claim 1, wherein: the thimble bodies are arranged in a circumferential mode.
4. A temperature control method of a temperature control thimble for casting according to any one of claims 1-3, wherein: the control module is also electrically connected with the circulating pump, and the processing module is also suitable for sending a control signal to the control module according to the detection signal of the temperature sensor, so that the control module can regulate the temperature of the temperature control loop by controlling the flow or the flow rate of the circulating pump.
5. The method for controlling the temperature of the temperature control thimble for casting according to claim 4, wherein: the temperature control method also comprises the following steps:
s210: when the temperature of only one region or a plurality of non-adjacent regions is higher than the working temperature T 0 When the circulating pump is in a working state, the processing module sends a control signal to the control module so that the control module controls the circulating pump to reduce the temperature T higher than the working temperature T 0 The flow rate or the flow velocity of the temperature control loop; and when there are a plurality of adjacent areas, the temperature is higher than the working temperature T 0 When the method is used, the next step is carried out;
s310: the processing module arranges the temperatures of a plurality of adjacent areas from high to low, and the control module controls the circulating pump to reduce the temperature higher than the working temperature T 0 The flow rate or the flow velocity of the temperature control loop of the device, and the degree of the reduction is from high to low according to the arrangement so as to realize gradientAnd (5) controlling.
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