Preparation process of ADI1200-4 brake disc

Abstract

The invention provides a preparation process of an ADI1200-4 brake disc, and belongs to the technical field of alloy production, the preparation process of the ADI1200-4 brake disc comprises the following steps: step 1, material preparation: preparing raw materials for preparing the ADI1200-4 brake disc according to a mass ratio; the ADI1200-4 brake disc is prepared from the following raw materials: iron, carbon, silicon, manganese, sulfur, phosphorus, copper, nickel and molybdenum. 2, smelting, wherein the raw materials prepared in the step 1 are added into a smelting furnace to be smelted, and molten iron is formed; and 3, the molten iron is poured into a mold, and the temperature of cooling fluid for cooling the mold is controlled in different cooling time periods, so that the molten iron is cooled to form an ADI1200-4 brake disc pouring piece. According to the method, in the pouring and cooling process of the molten iron in the mold, the temperature of the cooling fluid for cooling the mold is controlled in different cooling time periods, it is guaranteed that the molten iron is cooled at the corresponding ideal cooling speed in the different cooling time periods in the mold, the cooling effect is guaranteed, and therefore the quality of the finally prepared ADI1200-4 brake disc pouring piece is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of alloy production, and in particular to a preparation process of an ADI1200-4 brake disc. Background Art

[0002] The brake disc is an essential component of all vehicle braking systems. It is fixed on the axle and rotates with the wheel. When braking, the brake pad is squeezed onto the brake disc under the push of the caliper piston. The friction between the brake pad and the brake disc reduces the wheel speed, thereby achieving the purpose of decelerating and braking the vehicle.

[0003] The existing preparation method of brake discs has a molten iron pouring and cooling step (such as the preparation method disclosed in CN114247851B for the integrated pouring and cooling device for gray cast iron production and its application, which discloses the pouring and cooling of molten iron in the integrated pouring and cooling device), but does not disclose the adjustment of the temperature of the cooling fluid, and cannot adjust the appropriate cooling fluid temperature according to the cooling speed requirements of different stages / cooling periods in the molten iron forming process. Summary of the invention

[0004] The present invention provides a preparation process of an ADI1200-4 brake disc, which is used to solve the technical problems raised by the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a preparation process of an ADI1200-4 brake disc, comprising: Step 1: Ingredients: Prepare the raw materials for preparing ADI1200-4 brake discs according to the mass ratio; the raw materials for preparing ADI1200-4 brake discs include: iron, carbon, silicon, manganese, sulfur, phosphorus, copper, nickel, and molybdenum; Step 2: Smelting: Add the raw materials prepared in step 1 into a smelting furnace for smelting to form molten iron; Step 3: Pour molten iron into the mold, and control the temperature of the cooling fluid for cooling the mold in cooling periods, so that the molten iron is cooled to form an ADI1200-4 brake disc casting.

[0006] Preferably, the raw materials for preparing ADI1200-4 brake discs include, by mass percentage: carbon 3.6%-3.9%; silicon 2.3%-2.7%, manganese less than or equal to 0.35%; sulfur less than or equal to 0.02%; phosphorus less than or equal to 0.03%; copper 0.6%-0.8%; nickel less than 0.2%; molybdenum less than 0.1%; and the rest is iron.

[0007] Preferably, the spheroidization level of the ADI1200-4 brake disc casting is less than or equal to 3, the spheroidization rate is greater than or equal to 80%, and the graphite grade is 5-7.

[0008] Preferably, it also includes: Step 4: Clean the surface of the ADI1200-4 brake disc casting to form an ADI1200-4 brake disc blank; Step 5: Processing the ADI1200-4 brake disc blank to obtain a processed ADI1200-4 brake disc; Step 6: Heat treat the processed ADI1200-4 brake disc.

[0009] Preferably, the molten iron is poured into the mold, and the temperature of the cooling fluid for cooling the mold is controlled in different cooling periods based on a cooling system, the cooling system comprising: A cooling box, a nozzle device is arranged in the cooling box, the fluid inlet of the nozzle device is connected to the main inlet pipe, the main inlet pipe is connected to a number of fluid supply devices, the fluid supply devices include: a storage box and a cooling device, the cooling device is used to adjust the temperature of the cooling fluid in the storage box, each storage box is connected to a branch pipe one, the branch pipe one is connected to a fluid conveying power device, the fluid outlet of the branch pipe one is connected to the main inlet pipe, the cooling box is provided with a fluid discharge pipe, the fluid discharge pipe is connected to the collection box, and the branch pipe one is provided with a control valve; each cooling period of the ADI1200-4 brake disc casting is cooled by the cooling fluid in a storage box.

[0010] Preferably, a plurality of identical current first molds for preparing ADI1200-4 brake disc castings and at least one current test mold for preparing ADI1200-4 brake disc castings are placed in a cooling box, and the cooling system further comprises: A temperature sensor is embedded in the current test mold for preparing the ADI1200-4 brake disc casting. The temperature sensor is used to detect the temperature of molten iron at different positions in the cavity of the current test mold for preparing the ADI1200-4 brake disc casting. The current first mold for preparing the ADI1200-4 brake disc casting and the current test mold for preparing the ADI1200-4 brake disc casting have the same structure and materials except for the temperature sensor. A pressure sensor, the pressure sensor is arranged at the fluid outlet of the nozzle device, and the pressure sensor is used to detect the pressure of the fluid outlet of the nozzle device; A memory storing theoretical cooling parameters of each cooling period during the cooling process of the ADI1200-4 brake disc casting, parameters of the corresponding test mold of the ADI1200-4 brake disc casting, and first parameters of the ADI1200-4 brake disc casting. The theoretical cooling parameters include: an ideal cooling speed range; the parameters of the test mold include: an average wall thickness of the test mold, an area of ​​the test mold in contact with the cooling fluid; thermal conductivity of the test mold; heat transfer coefficient between the test mold and the cooling fluid; the first parameters of the ADI1200-4 brake disc casting include: an average wall thickness of the ADI1200-4 brake disc casting; thermal conductivity of molten iron in the corresponding molten iron state in different cooling periods for preparing the ADI1200-4 brake disc casting; A control device is electrically connected to the temperature sensor, pressure sensor, memory, cooling device and control valve respectively, and the control device controls the operation of the cooling device and control valve based on the memory, temperature sensor and pressure sensor.

[0011] Preferably, the control device controls the cooling device and the control valve based on the memory, the temperature sensor and the pressure sensor, including: Step S31: First, the control valves corresponding to the respective storage tanks are controlled to open and the corresponding fluid delivery power devices are controlled to work at rated power, and the pressure sensors are controlled to work, and the initial pressure loss coefficient of the cooling fluid delivered by each storage tank is obtained based on the detection value of the pressure sensor; each time the control valve corresponding to a storage tank is controlled to open and the corresponding fluid delivery power device is controlled to work at rated power, and the initial pressure loss coefficient of the cooling fluid delivered by the corresponding storage tank is obtained; Step S32: obtaining theoretical cooling parameters for each cooling period of the ADI1200-4 brake disc casting based on the memory, and parameters of the current test mold for the ADI1200-4 brake disc casting; Step S33: Perform a casting cooling test on the ADI1200-4 brake disc casting prepared with the current test mold using the molten iron of the current furnace, and determine the target fluid temperature of the cooling fluid for cooling the current first mold in each cooling period of the ADI1200-4 brake disc casting prepared with the molten iron of the current furnace; Step S34: using the molten iron of the current furnace to cast and cool the current first mold used to prepare the ADI1200-4 brake disc casting in the cooling box. When preparing each ADI1200-4 brake disc casting, the actual temperature of the cooling fluid used to cool the current first mold in each cooling period is the target fluid temperature of the cooling fluid in the corresponding cooling period; Step S33 includes: S331: Calculate the initial temperature state value based on all the temperature sensor detection values ​​when the molten iron in the current test mold starts to cool after pouring, and calculate the target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold based on the initial temperature state value, the initial pressure loss coefficient, the parameters of the current test mold for preparing the ADI1200-4 brake disc casting, and the first parameters of the ADI1200-4 brake disc casting, and control the cooling device of the storage box corresponding to the first cooling period to work so that the cooling fluid temperature in the storage box corresponding to the first cooling period is the target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold, and control the control valve of the branch pipe one corresponding to the storage box corresponding to the first cooling period to open, and spray the cooling fluid in the storage box corresponding to the first cooling period through the nozzle device to cool the current test mold; Step S332: The next cooling period calculates the target fluid temperature of the next cooling period for cooling the cooling fluid for cooling the current first mold based on the initial temperature state value, the initial pressure loss coefficient, the temperature sensor detection value of the previous cooling period, the parameters of the current test mold for preparing the ADI1200-4 brake disc casting, and the first parameters of the ADI1200-4 brake disc casting; the next cooling period controls the cooling device of the storage box corresponding to the next cooling period to operate, so that the cooling fluid temperature in the storage box corresponding to the next cooling period is the target fluid temperature of the next cooling period for cooling the cooling fluid for cooling the current first mold, so that the nozzle device sprays the cooling fluid in the storage box corresponding to the next cooling period to cool the current test mold.

[0012] Preferably, the initial pressure loss coefficient of the cooling fluid delivered by the storage tank is calculated based on the following formula: ; is the initial pressure loss coefficient of the cooling fluid delivered by the storage tank corresponding to the i-th cooling period; is the average detection value of the pressure sensor when the fluid transport power device corresponding to the storage box corresponding to the i-th cooling period in step S31 works at rated power; is the theoretical pressure of the fluid outlet of the nozzle device when the fluid delivery power device corresponding to the storage tank corresponding to the i-th cooling period works at rated power; The initial temperature state value is calculated based on the following formula; ; It is the maximum detection value of all temperature sensors when the molten iron in the current test mold starts to cool after being poured; It is the minimum detection value of all temperature sensors when the molten iron in the current test mold starts to cool after being poured; The time interval from the start of pouring molten iron to the start of cooling of the current test mold; for The corresponding theoretical value; The target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold in step S321 is calculated based on the following formula: ; in, a target fluid temperature for a first cooling period of a cooling fluid for cooling a current first mold; is the average detection value of all temperature sensors in the current test mold when the molten iron begins to cool after pouring; c is the specific heat capacity of the molten iron; m is the mass of a single ADI1200-4 brake disc casting, The median value of the ideal cooling rate range for the first cooling period of the ADI1200-4 brake disc casting; is the duration of the first cooling period of the ADI1200-4 brake disc casting, S is the area of ​​the current test mold in contact with the cooling fluid, H is the average wall thickness of the current test mold, is the thermal conductivity of the current test mold; is the heat transfer coefficient between the current test mold and the cooling fluid; h is the average wall thickness of a single ADI1200-4 brake disc casting; is the thermal conductivity of molten iron in the molten iron state corresponding to the first cooling period of the ADI1200-4 brake disc casting; The value is 3.14; is the natural logarithm, e is the natural constant; is the initial pressure loss coefficient of the cooling fluid delivered to the storage tank corresponding to the first cooling period; The target fluid temperature of the next cooling period of the cooling fluid for cooling the current first mold in step S322 is calculated based on the following formula: ; ; is the target fluid temperature of the i-th cooling period of the cooling fluid for cooling the current first mold; i is a positive integer between 2 and N, and N is the total number of cooling periods of the ADI1200-4 brake disc casting; is the average detection value of all temperature sensors at the end of the i-1th cooling period in the current test mold; is the average detection value of all temperature sensors at the end of the i-2th cooling period in the current test mold; is the median value of the ideal cooling rate range of the i-th cooling period of the ADI1200-4 brake disc casting; is the duration of the i-th cooling period of the ADI1200-4 brake disc casting; is the duration of the i-1th cooling period of the ADI1200-4 brake disc casting; is the thermal conductivity of the molten iron in the molten iron state corresponding to the i-th cooling period of the ADI1200-4 brake disc casting; is the cooling temperature correction coefficient of the i-th cooling period of the ADI1200-4 brake disc casting; is the base 10 logarithm.

[0013] Preferably, the processing includes: grinding processing, the grinding processing is performed based on a grinding device, and the grinding device includes: A placing box, the upper end of the placing box is fixedly connected to the grinding box, a compressed gas supply device is installed on the upper end of the grinding box, the front end of the grinding box is connected to the box door, the vertical block is fixedly connected to the upper end of the grinding box, the fixed end of the vertical electric telescopic rod is fixedly installed on the front side of the vertical block, the telescopic end of the vertical electric telescopic rod is fixedly connected to the slider, the slider slides along the up and down direction and is connected to the front side of the vertical block, and the fixed block is fixedly connected to the front side of the lower part of the vertical block; The rotating mechanism is connected to the lower end of the grinding box, and the ADI1200-4 brake disc blank to be ground is installed at the rotating end of the rotating mechanism; Two groups of auxiliary mechanisms are symmetrically arranged on the fixed block. The auxiliary mechanism on the left side includes: a cavity one, an air inlet one is arranged through the upper end of the cavity one, and an air outlet is arranged through the lower end of the cavity. The air inlet one is connected to a branch pipe two, and the branch pipe two is connected to the air supply main pipe. The air supply main pipe is connected to the air outlet of the compressed gas supply device. A connecting block is slidably connected in the cavity one along the left and right directions, and a vertical through hole is arranged in the middle of the connecting block; when the vertical electric telescopic rod is in the initial position, the air inlet one and the air outlet are respectively located directly above and directly below the right side wall of the connecting block, and the air inlet one is located directly above the air outlet. The left side of the connecting block is fixedly connected to a horizontal rod, and the horizontal rod slides along the left and right directions to penetrate the left side wall of the cavity one; the lower end of the air outlet is connected to a connecting pipe, and the connecting pipe is connected to the nozzle; Two groups of connecting rods, the two groups of connecting rods correspond to the two groups of auxiliary mechanisms respectively, the lower end of the connecting rod is hinged to one end of the corresponding horizontal rod located outside the cavity, and the upper end of the connecting rod is hinged to the corresponding side of the lower end of the slider; A grinding mechanism and a cleaning mechanism, the grinding mechanism is connected to the lower end of the horizontal rod on the left, and the cleaning mechanism is connected to the lower end of the horizontal rod on the right; the nozzles on the left and the right spray toward the left and right parts of the ADI1200-4 brake disc blank being ground respectively.

[0014] Preferably, the grinding mechanism comprises: Connecting frame 1, the connecting frame 1 is fixedly connected to the lower end of the horizontal rod on the left side, and the upper grinding block and the lower grinding block are connected at intervals on the right side of the lower part of the connecting frame, and the upper grinding block and the lower grinding block are used to grind the upper end and the lower end of the ADI1200-4 brake disc blank respectively; The cleaning mechanism includes: a connecting frame 2, the connecting frame 2 is fixedly connected to the lower end of the connecting rod horizontal rod on the right side, and the upper cleaning part and the lower cleaning part are connected at intervals at the lower left side of the connecting frame 2. The upper cleaning part and the lower cleaning part are respectively used to clean the upper and lower ends of the polished ADI1200-4 brake disc blank.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention controls the temperature of the cooling fluid for cooling the mold in different cooling periods during the process of pouring and cooling the molten iron in the mold, thereby ensuring that the molten iron is cooled at corresponding ideal cooling speeds in different cooling periods in the mold, ensuring the cooling effect, and thus ensuring the quality of the finally prepared ADI1200-4 brake disc casting.

[0017] The present invention solves the following problems raised by the background technology: The existing preparation method of brake discs has a molten iron pouring and cooling step (such as the preparation method disclosed in CN114247851B for the integrated pouring and cooling device for gray cast iron production and its application, which discloses the pouring and cooling of molten iron in the integrated pouring and cooling device), but does not disclose the adjustment of the temperature of the cooling fluid, and cannot adjust the appropriate cooling fluid temperature according to the cooling speed requirements of different stages / cooling periods in the molten iron forming process. 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 is a flow chart of the process of the present invention; Figure 2 It is a schematic structural diagram of the cooling system of the present invention; Figure 3 It is a structural schematic diagram of the grinding equipment of the present invention; Figure 4 A schematic diagram of the internal structure of a grinding box of a grinding device of the present invention; Figure 5 for Figure 4 Schematic diagram of the enlarged structure of area A in FIG.

[0019] In the figure: 1, cooling box; 2, storage box; 3, branch pipe 1; 4, main inlet pipe; 5, collection box; 6, grinding equipment; 61, placement box; 62, grinding box; 63, box door; 64, vertical block; 65, vertical electric telescopic rod; 66, slider; 67, fixed block; 68, rotating mechanism; 681, motor box; 682, motor; 683, vertical shaft; 684, driving gear; 685, driven gear; 69, auxiliary mechanism; 691, cavity 1; 692, air inlet 1; 693, branch pipe 2; 694, air outlet; 695, connecting block; 696, vertical through hole; 697, horizontal rod; 698, connecting pipe; 699, nozzle; 610, connecting rod; 611, connecting frame one; 612, upper grinding block; 613, lower grinding block; 614, connecting frame two; 615, upper cleaning piece; 616, lower cleaning piece; 617, cavity two; 618, camera; 619, lens; 620, connecting frame three; 621, lens blocking block; 622, sliding hole; 7, compressed gas supply device; 8, polished ADI1200-4 brake disc blank. DETAILED DESCRIPTION

[0020] 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.

[0021] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The present invention provides the following embodiments Embodiment 1: The embodiment of the present invention provides a preparation process of an ADI1200-4 brake disc, comprising: Step 1: Ingredients: Prepare the raw materials for preparing ADI1200-4 brake discs according to the mass ratio; the raw materials for preparing ADI1200-4 brake discs include: iron, carbon, silicon, manganese, sulfur, phosphorus, copper, nickel, and molybdenum; Step 2: Smelting: Add the raw materials prepared in step 1 into a smelting furnace for smelting to form molten iron; Step 3: pouring molten iron into the mold, and controlling the temperature of the cooling fluid for cooling the mold in different cooling periods, so that the molten iron is cooled to form an ADI1200-4 brake disc casting; The raw materials for preparing the ADI1200-4 brake disc include, by mass percentage: carbon 3.6%-3.9%; silicon 2.3%-2.7%, manganese less than or equal to 0.35%; sulfur less than or equal to 0.02%; phosphorus less than or equal to 0.03%; copper 0.6%-0.8%; nickel less than 0.2%; molybdenum less than 0.1%; the rest is iron; the present invention controls the chemical elements of the ADI1200-4 brake disc casting to determine the appropriate mass percentages of carbon, silicon, manganese, sulfur, phosphorus, copper, nickel and molybdenum, thereby ensuring the quality of the ADI1200-4 brake disc casting formed subsequently; The spheroidization level of ADI1200-4 brake disc casting is less than or equal to 3, the spheroidization rate is greater than or equal to 80%, and the graphite grade is 5-7; Also includes: Step 4: Clean the surface of the ADI1200-4 brake disc casting to form an ADI1200-4 brake disc blank; Step 5: Processing the ADI1200-4 brake disc blank to obtain a processed ADI1200-4 brake disc; Step 6: Heat treat the processed ADI1200-4 brake disc.

[0023] The heat treatment of ADI materials is a technology, and the heat treatment may include: heating, heat preservation, cooling, isothermal treatment; surface cleaning includes: shot blasting surface cleaning; It is an existing technology to process the ADI1200-4 brake disc blank, which may include grinding and drilling.

[0024] The beneficial effects of the above technical solution are: When preparing ADI1200-4, in addition to calculating the five elements of carbon, silicon, manganese, sulfur and phosphorus, a certain amount of alloying element copper must be added as required to ensure that it can be hardened through during subsequent quenching.

[0025] The present invention controls the temperature of the cooling fluid for cooling the mold in different cooling periods during the process of pouring and cooling the molten iron in the mold, thereby ensuring that the molten iron is cooled at corresponding ideal cooling speeds in different cooling periods in the mold, ensuring the cooling effect, and thus ensuring the quality of the finally prepared ADI1200-4 brake disc casting.

[0026] The present invention solves the following problems raised by the background technology: The existing preparation method of brake discs has a molten iron pouring and cooling step (such as the preparation method disclosed in CN114247851B for the integrated pouring and cooling device for gray cast iron production and its application, which discloses the pouring and cooling of molten iron in the integrated pouring and cooling device), but does not disclose the adjustment of the temperature of the cooling fluid, and cannot adjust the appropriate cooling fluid temperature according to the cooling speed requirements of different stages / cooling periods in the molten iron forming process.

[0027] Example 2, based on Example 1, molten iron is poured into the mold, and the temperature of the cooling fluid for cooling the mold is controlled in different cooling periods based on a cooling system, and the cooling system includes: A cooling box 1 is provided with a nozzle device in the cooling box 1, the fluid inlet of the nozzle device is connected to the main inlet pipe 4, the main inlet pipe 4 is connected to a plurality of fluid supply devices, the fluid supply devices include: a storage box 2 and a cooling device, the cooling device is used to adjust the temperature of the cooling fluid in the storage box 2, each storage box 2 is connected to a branch pipe 3, the branch pipe 3 is connected to a fluid conveying power device, the fluid outlet of the branch pipe 3 is connected to the main inlet pipe 4, the cooling box 1 is provided with a fluid discharge pipe, the fluid discharge pipe is connected to the collecting box 5, and the branch pipe 3 is provided with a control valve; each cooling period of the ADI1200-4 brake disc casting is cooled by the cooling fluid in a storage box 2.

[0028] The cooling fluid may be cooling water or cooling gas, and the fluid conveying power device may be a water pump or a fan; The beneficial effects of the above technical solution are as follows: each cooling period of the ADI1200-4 brake disc casting is cooled by the cooling fluid in a storage box 2, and the temperature of the cooling fluid in the storage box 2 corresponding to each cooling period is adjusted by the cooling device (for the same furnace of molten iron, the temperature of the cooling fluid in each storage box 2 can be set to a constant temperature), so that the temperature of the cooling fluid sprayed by the nozzle device in each cooling period meets the cooling rate requirement of the molten iron in the corresponding cooling period.

[0029] Embodiment 3, based on embodiment 2, a plurality of identical current first molds for preparing ADI1200-4 brake disc castings and at least one current test mold for preparing ADI1200-4 brake disc castings are placed in a cooling box, and the cooling system further comprises: A temperature sensor is embedded in the current test mold for preparing the ADI1200-4 brake disc casting. The temperature sensor is used to detect the temperature of molten iron at different positions in the cavity of the current test mold for preparing the ADI1200-4 brake disc casting. The current first mold for preparing the ADI1200-4 brake disc casting and the current test mold for preparing the ADI1200-4 brake disc casting have the same structure and materials except for the temperature sensor. A pressure sensor, the pressure sensor is arranged at the fluid outlet of the nozzle device, and the pressure sensor is used to detect the pressure of the fluid outlet of the nozzle device; A memory storing theoretical cooling parameters of each cooling period during the cooling process of the ADI1200-4 brake disc casting, parameters of the corresponding test mold of the ADI1200-4 brake disc casting, and first parameters of the ADI1200-4 brake disc casting. The theoretical cooling parameters include: an ideal cooling speed range; the parameters of the test mold include: an average wall thickness of the test mold, an area of ​​the test mold in contact with the cooling fluid; thermal conductivity of the test mold; heat transfer coefficient between the test mold and the cooling fluid; the first parameters of the ADI1200-4 brake disc casting include: an average wall thickness of the ADI1200-4 brake disc casting; thermal conductivity of molten iron in the corresponding molten iron state in different cooling periods for preparing the ADI1200-4 brake disc casting; A control device, wherein the control device is electrically connected to the temperature sensor, the pressure sensor, the memory, the cooling device, and the control valve, and the control device controls the cooling device and the control valve based on the memory, the temperature sensor, and the pressure sensor, and comprises: Step S31: First, the control valves corresponding to the storage tanks 2 are controlled to open and the corresponding fluid delivery power devices are controlled to work at rated power, and the pressure sensors are controlled to work, and the initial pressure loss coefficient of the cooling fluid delivered by each storage tank 2 is obtained based on the detection value of the pressure sensor; each time the control valve corresponding to one storage tank 2 is controlled to open and the corresponding fluid delivery power device is controlled to work at rated power, the initial pressure loss coefficient of the cooling fluid delivered by the corresponding storage tank 2 is obtained; Step S32: obtaining theoretical cooling parameters for each cooling period of the ADI1200-4 brake disc casting based on the memory, and parameters of the current test mold for the ADI1200-4 brake disc casting; Step S33: Perform a casting cooling test on the ADI1200-4 brake disc casting prepared with the current test mold using the molten iron of the current furnace, and determine the target fluid temperature of the cooling fluid for cooling the current first mold in each cooling period of the ADI1200-4 brake disc casting prepared with the molten iron of the current furnace; Step S34: using the molten iron of the current furnace to cast and cool the ADI1200-4 brake disc casting in the cooling box 1 using the current first mold, when preparing each ADI1200-4 brake disc casting, the actual temperature of the cooling fluid used to cool the current first mold in each cooling period is the target fluid temperature of the cooling fluid in the corresponding cooling period; Step S33 includes: S331: Calculate the initial temperature state value based on all the temperature sensor detection values ​​when the molten iron in the current test mold starts to cool after pouring, and calculate the target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold based on the initial temperature state value, the initial pressure loss coefficient, the parameters of the current test mold for preparing the ADI1200-4 brake disc casting, and the first parameters of the ADI1200-4 brake disc casting, and control the cooling device of the storage box 2 corresponding to the first cooling period to work, so that the cooling fluid temperature in the storage box 2 corresponding to the first cooling period is the target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold, and control the control valve of the branch pipe 3 corresponding to the storage box 2 corresponding to the first cooling period to open, and spray the cooling fluid in the storage box 2 corresponding to the first cooling period through the nozzle device to cool the current test mold; Step S332: The next cooling period calculates the target fluid temperature of the next cooling period for cooling the cooling fluid for cooling the current first mold based on the initial temperature state value, the initial pressure loss coefficient, the temperature sensor detection value of the previous cooling period, the parameters of the current test mold for preparing the ADI1200-4 brake disc casting, and the first parameters of the ADI1200-4 brake disc casting; the next cooling period controls the cooling device of the storage box 2 corresponding to the next cooling period to operate, so that the cooling fluid temperature in the storage box 2 corresponding to the next cooling period is the target fluid temperature of the next cooling period for cooling the cooling fluid for cooling the current first mold, so that the nozzle device sprays the cooling fluid in the storage box 2 corresponding to the next cooling period to cool the current test mold.

[0030] The initial pressure loss coefficient of the cooling fluid delivered by the storage tank 2 is calculated based on the following formula: ; is the initial pressure loss coefficient of the cooling fluid delivered by the storage tank 2 corresponding to the i-th cooling period; is the average detection value of the pressure sensor when the fluid transport power device corresponding to the storage box 2 corresponding to the i-th cooling period in step S31 works at rated power; is the theoretical pressure of the fluid outlet of the nozzle device when the fluid delivery power device corresponding to the storage tank 2 corresponding to the i-th cooling period works at rated power; The initial temperature state value is calculated based on the following formula; ; It is the maximum detection value of all temperature sensors when the molten iron in the current test mold starts to cool after being poured; It is the minimum detection value of all temperature sensors when the molten iron in the current test mold starts to cool after being poured; The time interval from the start of pouring molten iron to the start of cooling of the current test mold; for The corresponding theoretical value; The target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold in step S321 is calculated based on the following formula: ; in, a target fluid temperature for a first cooling period of a cooling fluid for cooling a current first mold; is the average detection value of all temperature sensors in the current test mold when the molten iron begins to cool after pouring; c is the specific heat capacity of the molten iron; m is the mass of a single ADI1200-4 brake disc casting, The median value of the ideal cooling rate range for the first cooling period of the ADI1200-4 brake disc casting; is the duration of the first cooling period of the ADI1200-4 brake disc casting, S is the area of ​​the current test mold in contact with the cooling fluid, H is the average wall thickness of the current test mold, is the thermal conductivity of the current test mold; is the heat transfer coefficient between the current test mold and the cooling fluid; h is the average wall thickness of a single ADI1200-4 brake disc casting; is the thermal conductivity of molten iron in the molten iron state corresponding to the first cooling period of the ADI1200-4 brake disc casting; The value is 3.14; is the natural logarithm, e is the natural constant; is the initial pressure loss coefficient of the cooling fluid delivered by the storage tank 2 corresponding to the first cooling period; The target fluid temperature of the next cooling period of the cooling fluid for cooling the current first mold in step S322 is calculated based on the following formula: ; ; is the target fluid temperature of the i-th cooling period of the cooling fluid for cooling the current first mold; i is a positive integer between 2 and N, and N is the total number of cooling periods of the ADI1200-4 brake disc casting; is the average detection value of all temperature sensors at the end of the i-1th cooling period in the current test mold; is the average detection value of all temperature sensors at the end of the i-2th cooling period in the current test mold; is the median value of the ideal cooling rate range of the i-th cooling period of the ADI1200-4 brake disc casting; is the duration of the i-th cooling period of the ADI1200-4 brake disc casting; is the duration of the i-1th cooling period of the ADI1200-4 brake disc casting; is the thermal conductivity of the molten iron in the molten iron state corresponding to the i-th cooling period of the ADI1200-4 brake disc casting; is the cooling temperature correction coefficient of the i-th cooling period of the ADI1200-4 brake disc casting; is the base 10 logarithm.

[0031] The beneficial effects of the above technical solution are: In the present invention, when pouring each furnace of molten iron, firstly, step S31 is executed to obtain the initial pressure loss state of the cooling fluid transported by each storage box 2 (i.e., the initial pressure loss coefficient of the cooling fluid transported by each storage box 2; due to the change of the internal state of the relevant pipelines for cooling fluid transport over a long period of time and the change of the performance of the fluid transport power device over a long period of time, the pressure loss state may change during the whole process of the cooling fluid being transported from the storage box 2 to the nozzle device, thereby changing the cooling effect of the cooling fluid at the same temperature on the mold); Due to the change of the environmental state in the cooling box 1, the natural cooling state of the molten iron is different, so the initial temperature state value is different; The environment inside the entire cooling box 1 is roughly similar, and the environment is not much different when pouring molten iron from the same furnace. Therefore, when pouring each furnace of molten iron, first use the molten iron from the current furnace to perform a pouring cooling test on the current test mold used to prepare the ADI1200-4 brake disc casting; determine the target fluid temperature of the cooling fluid for cooling the current first mold in each cooling period when the ADI1200-4 brake disc casting is formally prepared based on the current first mold using the molten iron from the current furnace; then, when the ADI1200-4 brake disc casting is formally prepared based on the current first mold using the molten iron from the current furnace, the actual temperature of the cooling fluid for cooling the current first mold in each cooling period is the target fluid temperature of the corresponding cooling period; determine the appropriate target fluid temperature of the cooling fluid for cooling the current first mold in each cooling period through the pouring cooling test of the current test mold, and ensure reliable cooling of the molten iron in the current first mold in each cooling period using the molten iron from the current furnace.

[0032] The present invention calculates the target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold based on the initial temperature state value, the initial pressure loss coefficient, the parameters of the current test mold for preparing the ADI1200-4 brake disc casting, and the first parameters of the ADI1200-4 brake disc casting, so that the target fluid temperature of the first cooling period matches the above-mentioned parameters in various aspects, thereby ensuring that the calculation of the target fluid temperature of the first cooling period is reliable; The next cooling period calculates the target fluid temperature of the next cooling period for the cooling fluid cooled by the current first mold based on the initial temperature state value, the initial pressure loss coefficient, the temperature sensor detection value of the previous cooling period, the parameters of the current test mold for preparing the ADI1200-4 brake disc casting, and the first parameters of the ADI1200-4 brake disc casting, so that the target fluid temperature of the first cooling period matches the above-mentioned parameters, thereby ensuring that the target fluid temperature of the next cooling period is calculated reliably.

[0033] Embodiment 4, on the basis of any one of Embodiments 1-3, as Figure 3-Figure 5 As shown, the processing includes: grinding processing, the grinding processing is performed based on a grinding device 6, and the grinding device 6 includes: A placing box 61 is provided, the upper end of the placing box 61 is fixedly connected to a grinding box 62, a compressed gas supply device 7 is installed on the upper end of the grinding box 62, the front end of the grinding box 62 is connected to a box door 63, a vertical block 64 is fixedly connected to the upper end of the grinding box 62, a fixed end of a vertical electric telescopic rod 65 is fixedly installed on the front side of the vertical block 64, a telescopic end of the vertical electric telescopic rod 65 is fixedly connected to a slider 66, the slider 66 is connected to the front side of the vertical block 64 by sliding in the up-down direction, and a fixed block 67 is fixedly connected to the front side of the lower part of the vertical block 64; the compressed gas supply device 7 can be an air compressor; the vertical electric telescopic rod 65 is used to drive the slider 66 to slide in the up-down direction on the front side of the vertical block 64 by telescoping; A rotating mechanism 68, the rotating mechanism 68 is connected to the lower end of the grinding box 62, and the polished ADI1200-4 brake disc blank 8 is installed on the rotating end of the rotating mechanism 68; Two sets of auxiliary mechanisms 69 are symmetrically arranged on the fixed block 67. The auxiliary mechanism 69 on the left side includes: a cavity 691, an air inlet 692 is provided at the upper end of the cavity 691, and an air outlet 694 is provided at the lower end of the cavity 691. The air inlet 692 is connected to a branch pipe 693, and the branch pipe 693 is connected to the air supply main pipe. The air supply main pipe is connected to the air outlet 694 of the compressed gas supply device 7. The cavity 691 is connected to a connecting block 69 that is slidable in the left and right directions. 5. A vertical through hole 696 is provided in the middle of the connecting block 695; when the vertical electric telescopic rod 65 is in the initial position, the air inlet 692 and the air outlet 694 are respectively located directly above and directly below the right side wall of the connecting block 695, and the air inlet 692 is located directly above the air outlet 694. The left side of the connecting block 695 is fixedly connected to a horizontal rod 697, and the horizontal rod 697 slides along the left and right directions to penetrate the left side wall of the cavity 691; the lower end of the air outlet 694 is connected to a connecting pipe 698, and the connecting pipe 698 is connected to a nozzle 699; Two groups of connecting rods 610, the two groups of connecting rods 610 correspond to the two groups of auxiliary mechanisms 69 respectively, the lower end of the connecting rod 610 is hinged to the end of the corresponding horizontal rod 697 outside the cavity 1 691, and the upper end of the connecting rod 610 is hinged to the corresponding side of the lower end of the slider 66; A grinding mechanism and a cleaning mechanism, the grinding mechanism is connected to the lower end of the horizontal rod 697 on the left, and the cleaning mechanism is connected to the lower end of the horizontal rod 697 on the right; the nozzle 699 on the left and the nozzle 699 on the right spray jets toward the left and right parts of the ADI1200-4 brake disc blank 8 being ground respectively.

[0034] The grinding mechanism comprises: A connecting frame 611, the connecting frame 611 is fixedly connected to the lower end of the horizontal rod 697 on the left side, and an upper grinding block 612 and a lower grinding block 613 are connected at intervals on the lower right side of the lower part of the connecting frame 611, and the upper grinding block 612 and the lower grinding block 613 are used to grind the upper end and the lower end of the ADI1200-4 brake disc blank 8 respectively; The cleaning mechanism includes: a second connecting frame 614, the second connecting frame 614 is fixedly connected to the lower end of the connecting rod horizontal rod 697 on the right side, and the upper cleaning member 615 and the lower cleaning member 616 are connected to the lower left side of the second connecting frame 614 at intervals, and the upper cleaning member 615 and the lower cleaning member 616 are respectively used to clean the upper end and the lower end of the polished ADI1200-4 brake disc blank 8. The upper cleaning member 615 and the lower cleaning member 616 can be brushes; The rotating mechanism 68 includes: a motor box 681, which is fixedly connected to the lower end of the grinding box 62, a motor 682 is installed in the motor box 681, a vertical shaft 683 rotates and passes through the upper end of the motor box 681, a driven gear 685 is connected to the vertical shaft 683, and the output shaft of the motor 682 is connected to the driving gear 684, the driving gear 684 is meshed with the driven gear 685, and the polished ADI1200-4 brake disc blank 8 is used to be installed on the upper part of the vertical shaft 683. The installation of the brake disc on the shaft is a prior art, such as CN221658992U; A cavity 2 617 is set in the fixed block 67 between the left and right cavities 1 691, and a camera 618 is installed in the cavity 2 617. A lens 619 of the camera 618 is located below the fixed block 67, and the lens 619 of the camera 618 is set downward. A side of the connecting block 695 away from the corresponding horizontal rod 697 is fixedly connected to a connecting frame 3 620, and a lens blocking block 621 is set on a side of the connecting frame 3 620 away from the corresponding horizontal rod 697. A sliding hole 622 is set at the lower end of the cavity 1 691 for the connecting frame 3 620 to slide horizontally left and right.

[0035] Among them, a dust hood is arranged in the polishing box 62 of the present invention, and the dust hood is connected to the dust collecting device / vacuum cleaner through a pipeline, which is a prior art, and can be seen in CN218398554U. The dust collector, pipeline, and dust hood are used to remove the debris after polishing in the polishing box 62; The present invention can also set a lower nozzle at the upper end of the motor box 681, and the lower nozzle is connected to the connecting pipe 698 on the corresponding side through the air pipe, and the lower nozzle sprays air toward the corresponding side of the lower end of the polished ADI1200-4 brake disc blank 8; In the present invention, an air cooling device may be provided on the second branch pipe 693 on the left side, so that the compressed gas is cooled and then ejected through the nozzle 699 on the left side to cool the upper grinding block 612 and the lower grinding block 613; The working principle and beneficial effects of the above technical solution are: 1. The vertical electric telescopic rod 65 is only started during the grinding process, such as Figure 4 As shown, when the vertical electric telescopic rod 65 is not started (in the initial position), the upper grinding block 612 and the lower grinding block 613 are located to the left of the installation position of the grinded ADI1200-4 brake disc blank 8 on the vertical shaft 683, and the upper cleaning member 615 and the lower cleaning member 616 are located to the right of the installation position of the grinded ADI1200-4 brake disc blank 8 on the vertical shaft 683, which does not affect the installation of the grinded ADI1200-4 brake disc blank 8 to the vertical shaft 683; When the vertical electric telescopic rod 65 is not started, the lens blocking block 621 does not block the lens 619 of the camera 618; when the vertical electric telescopic rod 65 is not started, the air inlet 1 692 and the corresponding air outlet 694 are blocked by the side wall of the corresponding connecting block 695, and the air inlet 1 692 and the corresponding air outlet 694 are not connected, so as to avoid the compressed gas affecting the operator to install the ADI1200-4 brake disc blank when not grinding; 2. During the grinding process of the present invention, the ADI1200-4 brake disc blank 8 to be ground is first installed on the vertical shaft 683, and then the vertical electric telescopic rod 65 is controlled to work so that the slider 66 moves upward, and the slider 66 drives the two horizontal rods 697 to approach each other through the two connecting rods 610: First, the upper grinding block 612 and the lower grinding block 613 are respectively located at the upper and lower ends of the left part of the ADI1200-4 brake disc blank 8 to be ground (the ADI1200-4 brake disc blank to be ground 8 is a ring structure), so that the upper cleaning member 615 and the lower cleaning member 616 are located at the upper and lower ends of the right part of the polished ADI1200-4 brake disc blank 8; secondly, the vertical through hole 696 is connected to the corresponding air inlet 692 and the air outlet 694; thirdly, the left and right lens blocking blocks 621 are close to each other to block the lens 619 of the blocking camera 618 as a whole; the present invention can realize the above three functions by controlling the vertical electric telescopic rod 65, and the control is convenient; Then, the motor 682 is controlled to work, and the motor 682 drives the driving gear 684 to rotate. Through the meshing of the driving gear 684 and the driven gear 685, the vertical shaft 683 and the polished ADI1200-4 brake disc blank 8 are rotated synchronously, and the upper and lower ends of the polished ADI1200-4 brake disc blank 8 are polished by the upper polishing block 612 and the lower polishing block 613 respectively, and the upper and lower ends of the polished ADI1200-4 brake disc blank 8 are cleaned by the upper cleaning piece 615 and the lower cleaning piece 616 respectively. Debris cleaning, while controlling the compressed gas supply device 7 to work, so that the compressed gas enters the nozzle 699 through the gas supply main pipe, the second branch pipe 693, the air inlet 1 692, the vertical through hole 696, the air outlet 694, and the connecting pipe 698 and is sprayed out, so as to blow away the debris on the polished ADI1200-4 brake disc blank 8, and suck it out through the above-mentioned dust hood; at this time, the left and right lens blocking blocks 621 block the lens 619 of the camera 618 as a whole, so as to prevent the debris from damaging the lens 619 of the camera 618; 3. After polishing is completed, the left and right lens blocking blocks 621 do not block the lens 619 of the camera 618, and the camera 618 can be used to capture the image of the polished upper surface 8 of the ADI1200-4 brake disc blank 8 to perform appearance inspection (appearance inspection by camera is a prior art, such as CN107941816A), and evaluate the quality of the polished upper surface 8 of the ADI1200-4 brake disc blank; 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 fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A preparation process of ADI1200-4 brake disc, characterized in that: include: Step 1: Ingredients: Prepare the raw materials for making ADI1200-4 brake disc according to the mass ratio; The raw materials used to make ADI1200-4 brake discs include: iron, carbon, silicon, manganese, sulfur, phosphorus, copper, nickel, and molybdenum; Step 2: Smelting: Add the raw materials prepared in step 1 into a smelting furnace for smelting to form molten iron; Step 3: Pour molten iron into the mold, and control the temperature of the cooling fluid for cooling the mold in cooling periods, so that the molten iron is cooled to form an ADI1200-4 brake disc casting.

2. The preparation process of an ADI1200-4 brake disc according to claim 1, characterized in that: The raw materials for preparing ADI1200-4 brake discs include, by mass percentage: carbon 3.6%-3.9%; silicon 2.3%-2.7%, manganese less than or equal to 0.35%; sulfur less than or equal to 0.02%; phosphorus less than or equal to 0.03%; copper 0.6%-0.8%; nickel less than 0.2%; molybdenum less than 0.1%; and the rest is iron.

3. The preparation process of the ADI1200-4 brake disc according to claim 1, characterized in that: The spheroidization level of ADI1200-4 brake disc castings is less than or equal to 3, the spheroidization rate is greater than or equal to 80%, and the graphite grade is 5-7.

4. The preparation process of an ADI1200-4 brake disc according to claim 1, characterized in that: Also includes: Step 4: Clean the surface of the ADI1200-4 brake disc casting to form an ADI1200-4 brake disc blank; Step 5: Processing the ADI1200-4 brake disc blank to obtain a processed ADI1200-4 brake disc; Step 6: Heat treat the processed ADI1200-4 brake disc.

5. The preparation process of the ADI1200-4 brake disc according to claim 1, characterized in that: The molten iron is poured into the mold, and the temperature of the cooling fluid for cooling the mold is controlled in different cooling periods based on a cooling system, which includes: A cooling box (1) is provided in the cooling box (1), wherein a nozzle device is provided in the cooling box (1), wherein a fluid inlet of the nozzle device is connected to a main inlet pipe (4), wherein the main inlet pipe (4) is connected to a plurality of fluid supply devices, wherein the fluid supply devices include: a storage box (2) and a cooling device, wherein the cooling device is used to adjust the temperature of the cooling fluid in the storage box (2), wherein each storage box (2) is connected to a branch pipe (3), wherein the branch pipe (3) is connected to a fluid conveying power device, wherein a fluid outlet of the branch pipe (3) is connected to the main inlet pipe (4), wherein a fluid discharge pipe is provided in the cooling box (1), wherein the fluid discharge pipe is connected to a collecting box (5), and wherein a control valve is provided on the branch pipe (3); wherein each cooling period of the ADI1200-4 brake disc casting is cooled by the cooling fluid in a storage box (2).

6. The preparation process of the ADI1200-4 brake disc according to claim 5, characterized in that: A plurality of identical first molds for preparing ADI1200-4 brake disc castings and at least one current test mold for preparing ADI1200-4 brake disc castings are placed in a cooling box, and the cooling system further comprises: A temperature sensor is embedded in the current test mold for preparing the ADI1200-4 brake disc casting. The temperature sensor is used to detect the temperature of molten iron at different positions in the cavity of the current test mold for preparing the ADI1200-4 brake disc casting. The current first mold for preparing the ADI1200-4 brake disc casting and the current test mold for preparing the ADI1200-4 brake disc casting have the same structure and materials except for the temperature sensor. A pressure sensor, the pressure sensor is arranged at the fluid outlet of the nozzle device, and the pressure sensor is used to detect the pressure of the fluid outlet of the nozzle device; A memory storing theoretical cooling parameters of each cooling period during the cooling process of the ADI1200-4 brake disc casting, parameters of the corresponding test mold of the ADI1200-4 brake disc casting, and first parameters of the ADI1200-4 brake disc casting. The theoretical cooling parameters include: an ideal cooling speed range; the parameters of the test mold include: an average wall thickness of the test mold, an area of ​​the test mold in contact with the cooling fluid; thermal conductivity of the test mold; heat transfer coefficient between the test mold and the cooling fluid; the first parameters of the ADI1200-4 brake disc casting include: an average wall thickness of the ADI1200-4 brake disc casting; thermal conductivity of molten iron in the corresponding molten iron state in different cooling periods for preparing the ADI1200-4 brake disc casting; A control device is electrically connected to the temperature sensor, pressure sensor, memory, cooling device and control valve respectively, and the control device controls the operation of the cooling device and control valve based on the memory, temperature sensor and pressure sensor.

7. The preparation process of the ADI1200-4 brake disc according to claim 6, characterized in that: The control device controls the cooling device and the control valve based on the memory, the temperature sensor and the pressure sensor, including: Step S31: First, the control valve corresponding to each storage tank (2) is controlled to open and the corresponding fluid transport power device is controlled to operate at rated power, and the pressure sensor is controlled to operate, and the initial pressure loss coefficient of the cooling fluid transported by each storage tank (2) is obtained based on the detection value of the pressure sensor; each time the control valve corresponding to one storage tank (2) is controlled to open and the corresponding fluid transport power device is controlled to operate at rated power, the initial pressure loss coefficient of the cooling fluid transported by the corresponding storage tank (2) is obtained; Step S32: obtaining theoretical cooling parameters for each cooling period of the ADI1200-4 brake disc casting based on the memory, and parameters of the current test mold for the ADI1200-4 brake disc casting; Step S33: Perform a casting cooling test on the ADI1200-4 brake disc casting prepared with the current test mold using the molten iron of the current furnace, and determine the target fluid temperature of the cooling fluid for cooling the current first mold in each cooling period of the ADI1200-4 brake disc casting prepared with the molten iron of the current furnace; Step S34: using the molten iron of the current furnace to cast and cool the ADI1200-4 brake disc casting in the cooling box (1) using the current first mold, when preparing each ADI1200-4 brake disc casting, the actual temperature of the cooling fluid used to cool the current first mold in each cooling period is the target fluid temperature of the cooling fluid in the corresponding cooling period; Step S33 includes: S331: Calculate the initial temperature state value based on all the temperature sensor detection values ​​when the molten iron in the current test mold begins to cool after being poured, and calculate the target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold based on the initial temperature state value, the initial pressure loss coefficient, the parameters of the current test mold for preparing the ADI1200-4 brake disc casting, and the first parameters of the ADI1200-4 brake disc casting, and control the cooling device of the storage box (2) corresponding to the first cooling period to operate so that the cooling fluid temperature in the storage box (2) corresponding to the first cooling period is the target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold, and control the control valve of the branch pipe 1 (3) corresponding to the storage box (2) corresponding to the first cooling period to open, and spray the cooling fluid in the storage box (2) corresponding to the first cooling period through the nozzle device to cool the current test mold; Step S332: The target fluid temperature of the next cooling period for cooling the cooling fluid for cooling the current first mold is calculated based on the initial temperature state value, the initial pressure loss coefficient, the temperature sensor detection value of the previous cooling period, the parameters of the current test mold for preparing the ADI1200-4 brake disc casting, and the first parameters of the ADI1200-4 brake disc casting; the cooling device of the storage box (2) corresponding to the next cooling period is controlled to operate so that the temperature of the cooling fluid in the storage box (2) corresponding to the next cooling period is the target fluid temperature of the next cooling period for cooling the cooling fluid for cooling the current first mold, so that the nozzle device sprays the cooling fluid in the storage box (2) corresponding to the next cooling period to cool the current test mold.

8. The preparation process of the ADI1200-4 brake disc according to claim 7, characterized in that: The initial pressure loss coefficient of the cooling fluid delivered by the storage tank (2) is calculated based on the following formula: ； is the initial pressure loss coefficient of the cooling fluid delivered by the storage tank (2) corresponding to the i-th cooling period; is the average detection value of the pressure sensor when the fluid transport power device corresponding to the storage box (2) corresponding to the i-th cooling period in step S31 works at rated power; is the theoretical pressure of the fluid outlet of the nozzle device when the fluid delivery power device corresponding to the storage box (2) corresponding to the i-th cooling period works at rated power; The initial temperature state value is calculated based on the following formula; ； It is the maximum detection value of all temperature sensors when the molten iron in the current test mold starts to cool after being poured; It is the minimum detection value of all temperature sensors when the molten iron in the current test mold starts to cool after being poured; The time interval from the start of pouring molten iron to the start of cooling of the current test mold; for The corresponding theoretical value; The target fluid temperature of the first cooling period of the cooling fluid for cooling the current first mold in step S321 is calculated based on the following formula: ； in, a target fluid temperature for a first cooling period of a cooling fluid for cooling a current first mold; is the average detection value of all temperature sensors in the current test mold when the molten iron begins to cool after pouring; c is the specific heat capacity of the molten iron; m is the mass of a single ADI1200-4 brake disc casting, The median value of the ideal cooling rate range for the first cooling period of the ADI1200-4 brake disc casting; is the duration of the first cooling period of the ADI1200-4 brake disc casting, S is the area of ​​the current test mold in contact with the cooling fluid, H is the average wall thickness of the current test mold, is the thermal conductivity of the current test mold; is the heat transfer coefficient between the current test mold and the cooling fluid; h is the average wall thickness of a single ADI1200-4 brake disc casting; is the thermal conductivity of molten iron in the molten iron state corresponding to the first cooling period of the ADI1200-4 brake disc casting; The value is 3.14; is the natural logarithm, e is the natural constant; an initial pressure loss coefficient of the cooling fluid delivered to the storage tank (2) corresponding to the first cooling period; The target fluid temperature of the next cooling period of the cooling fluid for cooling the current first mold in step S322 is calculated based on the following formula: ； ； is the target fluid temperature of the i-th cooling period of the cooling fluid for cooling the current first mold; i is a positive integer between 2 and N, and N is the total number of cooling periods of the ADI1200-4 brake disc casting; is the average detection value of all temperature sensors at the end of the i-1th cooling period in the current test mold; is the average detection value of all temperature sensors at the end of the i-2th cooling period in the current test mold; is the median value of the ideal cooling rate range of the i-th cooling period of the ADI1200-4 brake disc casting; is the duration of the i-th cooling period of the ADI1200-4 brake disc casting; is the duration of the i-1th cooling period of the ADI1200-4 brake disc casting; is the thermal conductivity of the molten iron in the molten iron state corresponding to the i-th cooling period of the ADI1200-4 brake disc casting; is the cooling temperature correction coefficient of the i-th cooling period of the ADI1200-4 brake disc casting; is the base 10 logarithm.

9. The preparation process of the ADI1200-4 brake disc according to claim 4, characterized in that: The processing includes: a grinding process, the grinding process is performed based on a grinding device (6), and the grinding device (6) includes: A placing box (61), the upper end of the placing box (61) is fixedly connected to a polishing box (62), a compressed gas supply device (7) is installed on the upper end of the polishing box (62), the front end of the polishing box (62) is connected to a box door (63), a vertical block (64) is fixedly connected to the upper end of the polishing box (62), a fixed end of a vertical electric telescopic rod (65) is fixedly installed on the front side of the vertical block (64), a telescopic end of the vertical electric telescopic rod (65) is fixedly connected to a slider (66), the slider (66) is slidably connected to the front side of the vertical block (64) along the up and down direction, and a fixed block (67) is fixedly connected to the lower front side of the vertical block (64); A rotating mechanism (68), the rotating mechanism (68) is connected to the lower end of the polishing box (62), and the polished ADI1200-4 brake disc blank (8) is installed on the rotating end of the rotating mechanism (68); Two groups of auxiliary mechanisms (69), the two groups of auxiliary mechanisms (69) are symmetrically arranged on the fixed block (67) on the left and right, the auxiliary mechanism (69) on the left side comprises: a cavity (691), an air inlet (692) is provided at the upper end of the cavity (691), and an air outlet (694) is provided at the lower end of the cavity (691), the air inlet (692) is connected to a branch pipe (693), the branch pipe (693) is connected to a main air supply pipe, the main air supply pipe is connected to the air outlet (694) of the compressed gas supply device (7), and a connecting block (695) is slidably connected in the cavity (691) along the left and right directions. ), a vertical through hole (696) is provided in the middle of the connecting block (695); when the vertical electric telescopic rod (65) is in the initial position, the air inlet 1 (692) and the air outlet (694) are respectively located directly above and directly below the right side wall of the connecting block (695), and the air inlet 1 (692) is located directly above the air outlet (694); the left side of the connecting block (695) is fixedly connected to a horizontal rod (697), and the horizontal rod (697) slides along the left and right directions and penetrates the left side wall of the cavity 1 (691); the lower end of the air outlet (694) is connected to a connecting pipe (698), and the connecting pipe (698) is connected to a nozzle (699); Two groups of connecting rods (610), the two groups of connecting rods (610) correspond to the two groups of auxiliary mechanisms (69) respectively, the lower end of the connecting rod (610) is hinged to one end of the corresponding horizontal rod (697) located outside the cavity (691), and the upper end of the connecting rod (610) is hinged to the corresponding side of the lower end of the slider (66); A grinding mechanism and a cleaning mechanism, wherein the grinding mechanism is connected to the lower end of the horizontal rod (697) on the left side, and the cleaning mechanism is connected to the lower end of the horizontal rod (697) on the right side; the nozzle (699) on the left side and the nozzle (699) on the right side spray air toward the left and right parts of the ADI1200-4 brake disc blank (8) being ground, respectively.

10. The preparation process of the ADI1200-4 brake disc according to claim 9, characterized in that: The grinding mechanism comprises: A connecting frame (611), the connecting frame (611) is fixedly connected to the lower end of the horizontal rod (697) on the left side, and an upper grinding block (612) and a lower grinding block (613) are connected to the right side of the lower part of the connecting frame (611) at an interval, and the upper grinding block (612) and the lower grinding block (613) are respectively used to grind the upper end and the lower end of the ADI1200-4 brake disc blank (8) to be polished; The cleaning mechanism comprises: a second connecting frame (614), the second connecting frame (614) is fixedly connected to the lower end of the connecting rod horizontal rod (697) on the right side, and an upper cleaning member (615) and a lower cleaning member (616) are connected at an interval at the upper and lower parts of the left lower part of the second connecting frame (614), and the upper cleaning member (615) and the lower cleaning member (616) are respectively used to clean the upper end and the lower end of the polished ADI1200-4 brake disc blank (8).

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