Machining control method for hot forming steel part and related equipment

Abstract

The invention discloses a machining control method and related equipment for a hot forming steel part, and relates to the technical field of stamping forming manufacturing. The method comprises the steps that temperature distribution of the surface of a hot forming steel plate with a zinc-based coating is obtained; based on the temperature distribution and an air cooling control model, the surface of the hot-formed steel plate with the zinc-based coating is pre-cooled, a steel plate to be stamped is obtained, and the air cooling control model comprises an air knife parameter model and an air bellow parameter model; and the steel plate to be stamped is subjected to stamping forming and pressure maintaining quenching, and the zinc-based coating hot forming steel part is obtained.

Description

Technical Field

[0001] The present application relates to the technical field of stamping forming manufacturing, and particularly relates to a processing control method for hot-formed steel parts and related equipment. Background Art

[0002] Hot-formed steel is widely used in the manufacturing of automotive parts, which can improve the strength of parts and achieve lightweight. However, traditional hot-formed steel is prone to generate scale during the production process, affecting the die life and increasing production costs. To solve this problem, aluminized-silicon-coated and zinc-based-coated hot-formed steels have emerged. The former improves corrosion resistance, while the latter provides stronger corrosion resistance. However, the low melting point of the zinc-based coating will cause the liquid zinc to react with the substrate during hot stamping, thereby triggering the LME (Liquid Metal Embrittlement) phenomenon.

[0003] To avoid this problem, traditional hot stamping processes require precise control of heating and stamping temperatures, but the prior art has not effectively solved the liquid zinc embrittlement caused by high temperatures. Therefore, in the hot stamping process of zinc-based-coated hot-formed steel, how to effectively control the temperature of the sheet metal and avoid the occurrence of the LME phenomenon has become an important issue for improving stamping formability. Summary of the Invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description section. The Summary of the Invention section of the present application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] In a first aspect, the present application provides a processing control method for hot-formed steel parts, including:

[0006] Obtaining the temperature distribution on the surface of a zinc-based-coated hot-formed steel sheet;

[0007] Based on the above temperature distribution and an air-cooling control model, performing pre-cooling treatment on the surface of the zinc-based-coated hot-formed steel sheet to obtain a steel sheet to be stamped, wherein the air-cooling control model includes an air knife parameter model and an air box parameter model;

[0008] Performing stamping forming and pressure-holding quenching on the steel sheet to be stamped to obtain a zinc-based-coated hot-formed steel part.

[0009] In a feasible implementation manner, when the current air-cooling control model is the above air knife parameter model, the specific steps for obtaining the air knife jet speed include:

[0010] Determining the heat removed from the steel sheet based on the steel sheet mass, the specific heat capacity of the steel sheet, and the expected temperature drop;

[0011] Based on the heat removed by the steel plate, the surface area of the steel plate, the surface temperature of the steel plate, the temperature of the cooling medium, and the cooling time, determine the convective heat transfer coefficient;

[0012] Based on the above convective heat transfer coefficient, the length of the steel plate, the Prandtl number of the cooling medium, and the thermal conductivity of the cooling medium, determine the Reynolds number of the cooling medium;

[0013] Based on the above Reynolds number of the cooling medium, the above length of the steel plate, the dynamic viscosity of the cooling medium, and the density of the cooling medium, determine the air knife jet velocity.

[0014] In a feasible implementation manner, when the current air-cooling control model is the above air box parameter model, the specific steps for obtaining the air box jet velocity include:

[0015] Based on the mass of the steel plate, the specific heat capacity of the steel plate, and the expected temperature drop, determine the heat removed by the steel plate;

[0016] Based on the hole diameter and the number of holes, determine the total hole area;

[0017] Based on the jet height and the horizontal distance from the nozzle to the steel plate, determine the jet angle efficiency coefficient;

[0018] Based on the above heat removed by the steel plate, the above total hole area, the above jet angle efficiency coefficient, the specific heat capacity of the cooling medium, the temperature of the cooling medium, the surface temperature of the steel plate, and the cooling time, determine the air box jet velocity.

[0019] In a feasible implementation manner, it further includes:

[0020] Based on the steel plate specification and the jet velocity, control the pre-cooling duration to be less than or equal to the first preset time, so that the temperature difference between the steel plate after pre-cooling and the steel plate before pre-cooling is within the first preset range, where the above first preset range is greater than or equal to the first preset temperature and less than or equal to the second preset temperature.

[0021] In a feasible implementation manner, the above pre-cooling treatment includes:

[0022] When it is detected that the steel plate exits the heating furnace, control the start and stop of the pre-cooling device to perform jet cooling treatment on the above steel plate.

[0023] In a feasible implementation manner, it further includes:

[0024] During the pre-cooling process of the steel plate, use infrared imaging or laser scanning to monitor the surface temperature of the steel plate in real time, and optimize the jet velocity and the cooling method based on the above surface temperature of the steel plate to ensure uniform cooling of the steel plate.

[0025] In a feasible implementation manner, it further includes:

[0026] Before the stamping forming operation after the pre-cooling operation ends, control the steel plate to stand still for a second preset time so that the temperature of the steel plate is less than or equal to the preset stamping temperature.

[0027] In a second aspect, the present application provides a processing control device for hot-formed steel parts, including:

[0028] A temperature detection unit for obtaining the temperature distribution on the surface of the hot-formed steel plate with a zinc-based coating;

[0029] A cooling treatment unit for pre-cooling the surface of the hot-formed steel plate with a zinc-based coating based on the above temperature distribution and an air-cooling control model to obtain a steel plate to be stamped, wherein the air-cooling control model includes an air knife parameter model and an air box parameter model;

[0030] A stamping forming unit for stamping and pressure quenching the steel plate to be stamped to obtain a hot-formed steel part with a zinc-based coating.

[0031] In a third aspect, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program stored in the memory, it implements the steps of the processing control method for hot-formed steel parts according to any one of the first aspects.

[0032] In a fourth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the processing control method for hot-formed steel parts according to any one of the first aspects.

[0033] In summary, through the pre-cooling technology of the air knife device and the air box device, the present application can accurately control the surface temperature of the steel plate blank with a zinc-based coating before it is transferred from the heating furnace to the press die. By adjusting the parameters of the air knife and the air box, such as the jet speed, the jet angle, and the air volume, the uniformity and efficiency of pre-cooling are ensured, and the occurrence of the LME phenomenon is avoided. This method can adjust the pre-cooling parameters according to the blank specifications and different part sizes, improving the adaptability of the production line and facilitating the transformation of the existing production line. Compared with the traditional process, the present application effectively reduces the temperature of the blank, ensuring the formability of hot stamping and the strength and corrosion resistance of the parts. Overall, this method not only improves the stability of the hot stamping process but also improves the part quality, having broad industrial application prospects and economic benefits. Description of the Drawings

[0034] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of this specification. Also, throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0035] Figure 1 Schematic diagram of the processing control method for hot-formed steel parts provided by an embodiment of the present application;

[0036] Figure 2(a) is a schematic cross-sectional view of the bellows provided by an embodiment of the present application;

[0037] Figure 2(b) is a schematic cross-sectional view of the bellows with an internal air duct provided by an embodiment of the present application;

[0038] Figure 3 Stereogram of the bellows provided by an embodiment of the present application.

[0039] Figure 4 Schematic diagram of the structure of the processing control device for hot-formed steel parts provided by an embodiment of the present application;

[0040] Figure 5 Schematic diagram of the structure of the processing control electronic device for hot-formed steel parts provided by an embodiment of the present application. Specific embodiments

[0041] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0042] Please refer to Figure 1 , which is a schematic diagram of the processing control method for a hot-formed steel part provided by an embodiment of the present application, and specifically may include:

[0043] S110. Obtain the temperature distribution on the surface of the zinc-based coated hot-formed steel plate;

[0044] Exemplarily, the surface temperature distribution of the hot-formed steel sheet with zinc-based coating is obtained by a temperature detection device. Due to the uneven temperature distribution in the heating furnace and the temperature difference during the heating and transfer of the steel sheet, an infrared imager or a laser scanning device can be used to scan the surface of the steel sheet in real time and accurately, and obtain the temperature data of different regions. These devices can provide temperature distribution images to help identify regions with higher or lower temperatures, thus providing a basis for optimizing the subsequent cooling process. Specifically, by analyzing the temperature differences in each region, key data such as the average temperature, maximum temperature, minimum temperature, and temperature gradient of the sheet can be calculated, providing detailed support for formulating the subsequent cooling strategy. According to the temperature distribution data, the system can accurately adjust the parameters of the air knife and air box devices to ensure uniform cooling of the steel sheet surface, avoid local overheating or overcooling, and reduce the occurrence of the LME phenomenon.

[0045] S120. Based on the temperature distribution and the air-cooling control model, perform pre-cooling treatment on the surface of the hot-formed steel sheet with zinc-based coating to obtain a steel sheet to be stamped, where the air-cooling control model includes an air knife parameter model and an air box parameter model;

[0046] Exemplarily, according to the obtained temperature distribution data and the air-cooling control model, the system performs pre-cooling treatment on the surface of the hot-formed steel sheet with zinc-based coating. The air-cooling control model includes an air knife parameter model and an air box parameter model, which determine appropriate cooling strategies based on factors such as the surface temperature distribution of the steel sheet, the steel sheet specifications, and the temperature of the cooling medium. The air knife parameter model mainly adjusts parameters such as the jet speed, jet angle, and jet air volume to achieve rapid cooling of high-temperature regions; the air box parameter model adjusts the distribution and intensity of the air flow in the air box according to characteristics such as the aperture, the number of holes, and the jet height, so as to achieve the effect of uniform cooling.

[0047] By combining the temperature distribution data and the control model, the system can accurately adjust the injection parameters of the cooling medium during the pre-cooling process to ensure that the surface temperature of the steel sheet drops uniformly. This process not only effectively avoids the LME phenomenon caused by overheated regions, but also can reduce the mold inlet temperature and improve the forming quality of the stamped parts on the premise of ensuring the formability of the sheet. The implementation of this method can perform dynamic adjustment for steel sheets of different specifications and thicknesses, improve the cooling efficiency and uniformity, and thus ensure the stability of the production process and the high-quality forming of parts.

[0048] S130. Perform stamping and pressure maintaining and quenching on the above-mentioned steel sheet to be stamped to obtain a hot-formed steel part with zinc-based coating.

[0049] Exemplarily, the steel sheet to be stamped after pre-cooling treatment is transferred to a stamping die for stamping and forming. At this time, the temperature of the steel sheet has dropped to a range suitable for stamping, usually not exceeding 750 °C, avoiding the occurrence of the LME phenomenon. The stamping process deforms the steel sheet in the die by applying pressure, thereby forming the required part shape. The precise adjustment of temperature control ensures the plasticity and strength of the steel sheet during the forming process, avoiding the influence of too high or too low temperature on the deformation ability of the material.

[0050] After stamping and forming, the steel sheet part enters the pressure-holding quenching stage. During this process, an appropriate pressure-holding pressure is applied and maintained for a certain time to ensure that the internal structure of the part is properly hardened. This step helps to improve the strength and toughness of the finished part and ensure the surface quality and durability of the part by controlling the cooling rate and pressure-holding time. Pressure-holding quenching can not only effectively improve the mechanical properties of zinc-based coating hot-formed steel parts, but also reduce microcracks or other defects that may occur during the forming process, thus ensuring that the performance of the final part meets the requirements.

[0051] In some examples, when the current air-cooling control model is the above air knife parameter model, the specific steps for obtaining the air knife jetting speed include:

[0052] Based on the mass of the steel sheet, the specific heat capacity of the steel sheet, and the expected temperature drop, determine the heat removed from the steel sheet;

[0053] Based on the above heat removed from the steel sheet, the surface area of the steel sheet, the surface temperature of the steel sheet, the temperature of the cooling medium, and the cooling time, determine the convective heat transfer coefficient;

[0054] Based on the above convective heat transfer coefficient, the length of the steel sheet, the Prandtl number of the cooling medium, and the thermal conductivity of the cooling medium, determine the Reynolds number of the cooling medium;

[0055] Based on the above Reynolds number of the cooling medium, the above length of the steel sheet, the dynamic viscosity of the cooling medium, and the density of the cooling medium, determine the air knife jetting speed.

[0056] Exemplarily, first, based on the mass of the steel sheet, the specific heat capacity of the steel sheet, and the expected temperature drop, the heat that needs to be removed from the steel sheet can be determined. This process is based on the specific heat capacity of the steel sheet, that is, the heat absorbed or released by a unit mass of the steel sheet under a unit temperature change, as well as the mass of the steel sheet and the expected temperature drop, to calculate the total heat to be removed from the surface of the steel sheet. This is to ensure that the surface temperature of the steel sheet is reduced to the predetermined stamping temperature range through the cooling process, thereby avoiding the influence of overheating or overcooling on the stamping and forming performance.

[0057] The above content is expressed as:

[0058] Q = m s × c s × ΔT

[0059] Among them, Q is the heat to be removed from the steel plate, m s is the mass of the steel plate, c s is the specific heat capacity of the steel, and ΔT is the expected temperature drop.

[0060] m s = ρ s ×V s = ρ s ×A s ×d

[0061] A s = W × L

[0062] Among them, ρ s is the density of the steel plate, V s is the volume of the steel plate, A s is the surface area of the steel plate, d is the thickness of the steel plate, W is the width of the steel plate, and L is the length of the steel plate.

[0063] Next, based on the heat removed from the steel plate, the surface area of the steel plate, the surface temperature of the steel plate, the temperature of the cooling medium, and the cooling time, the convective heat transfer coefficient can be calculated using Newton's law of cooling. The convective heat transfer coefficient reflects the heat exchange efficiency between the surface of the steel plate and the cooling medium. The calculation of the convective heat transfer coefficient depends on factors such as the surface temperature difference of the steel plate, the temperature of the cooling medium, and the cooling time. The larger this coefficient, the higher the cooling efficiency, and the faster the temperature of the steel plate can be reduced, thus ensuring the effect of the cooling process.

[0064] The above content is expressed as:

[0065]

[0066] Among them, h is the convective heat transfer coefficient, T s is the surface temperature of the steel plate, t c is the cooling time, and T a is the temperature of the cooling medium.

[0067] After determining the convective heat transfer coefficient, further use parameters such as the Prandtl number of the cooling medium, the thermal conductivity of the cooling medium, and the length of the steel plate to calculate the Reynolds number of the cooling medium. The Reynolds number is an important parameter describing the flow characteristics of the fluid and determines whether the cooling medium is in a laminar or turbulent state during the spraying process. Turbulent flow has a higher heat transfer capacity. Therefore, by calculating the Reynolds number, the flow state of the cooling medium can be determined, and the air knife jet parameters can be adjusted accordingly.

[0068] The above content is expressed as:

[0069]

[0070] Among them, Re L is the Reynolds number of the cooling medium, P ris the Prandtl number of the cooling medium, k a is the thermal conductivity of the cooling medium, A is an empirical coefficient applicable to the heat transfer process in a flat plate with turbulent flow, B is the exponent of the Reynolds number of the cooling medium, and C is the exponent of the Prandtl number of the cooling medium, representing the thermo-viscous interaction in convective heat transfer.

[0071] Exemplarily, in the embodiments of the present application, the empirical coefficient is an empirical coefficient obtained from experimental data for the flat plate cooling case with turbulent flow under forced convection. Its source is mainly the Dittus-Boelter equation, which is applicable to the heat transfer situation of turbulent flow on the surface of a pipe or a flat plate. In the case of turbulent flow, the Nusselt number is usually proportional to the 0.8th power of the Reynolds number, and the exponent is derived from the Prandtl-Batchelor empirical formula. The Prandtl number exponent comes from the Colburn empirical formula, which is used to describe the thermo-viscous effect in the fluid. The Prandtl number is a dimensionless quantity representing the ratio between the viscosity and the thermal conductivity of the fluid. It has different values for different fluids and is set according to the actual cooling medium.

[0072] Finally, based on the Reynolds number of the cooling medium, the length of the steel plate, the dynamic viscosity of the cooling medium, and the density of the cooling medium, the air knife jet velocity can be further calculated. The greater the jet velocity, the stronger the cooling effect, and more heat can be removed quickly. When calculating the jet velocity, it is necessary to balance the requirements of cooling efficiency and the formability of the steel plate to avoid forming defects caused by too rapid temperature drop.

[0073] The above content is expressed as:

[0074]

[0075] where ρ a is the density of the cooling medium, V f is the air knife jet velocity, and μ is the dynamic viscosity of the cooling medium.

[0076] The technical solution of the present application will be further described in detail below through specific embodiments.

[0077] The length L of the steel plate is 1 m, the width W is 0.5 m, the thickness d is 0.001 m, and the initial temperature T of the steel plate s is 900 °C, that is, 1173 K, and the target temperature T of the steel plate f is 750 °C, that is, 1023 K, the temperature T of the cooling medium a is 25 °C, that is, 298 K, and the cooling time t c is 4 s, the density ρ of steel s is 7850 kg / m 3 , the specific heat capacity c of steel s is 500 J / (kg×K), and the density ρ of the cooling medium ais 1.184 kg / m 3 , the dynamic viscosity μ of the cooling medium is 1.85×10 -5 Pa·s, the specific heat capacity c a of the cooling medium is 1005 J / (kg×K), and the thermal conductivity k a of the cooling medium is 0.0262 W / m×K.

[0078] Calculate the heat Q to be removed, expressed as:

[0079] ΔT = T s - T f = 150 K

[0080] A s = L×W = 1×0.5 = 0.5 m 2

[0081] m s = ρ s ×A s ×d = 7850×0.5×0.001 = 3.925 kg

[0082] Q = m s ×c s ×ΔT = 3.925×500×150 = 294375 J

[0083] Calculate the convective heat transfer coefficient h, expressed as:

[0084]

[0085] Calculate the Prandtl number P r of the cooling medium, expressed as:

[0086]

[0087] Calculate the Reynolds number Re L of the cooling medium, expressed as:

[0088]

[0089] Calculate the air knife jet velocity V f , expressed as:

[0090]

[0091] In summary, the process of obtaining the air knife jet velocity is through a series of thermodynamic models and fluid mechanics calculations, comprehensively considering the physical properties, temperature changes, and flow characteristics of the steel plate and the cooling medium, ensuring the efficiency and uniformity of the pre-cooling process, so as to provide an appropriate steel plate temperature for subsequent stamping forming.

[0092] In some instances, when the current air-cooling control model is the above-mentioned bellows parameter model, the specific steps for obtaining the bellows jet velocity include:

[0093] Determine the heat removed from the steel plate based on the mass of the steel plate, the specific heat capacity of the steel plate, and the expected temperature drop.

[0094] Determine the total hole area based on the hole diameter and the number of holes.

[0095] Determine the jet angle efficiency coefficient based on the jet height and the horizontal distance from the nozzle to the steel plate.

[0096] Determine the bellows jet velocity based on the heat removed from the steel plate, the total hole area, the jet angle efficiency coefficient, the specific heat capacity of the cooling medium, the temperature of the cooling medium, the surface temperature of the steel plate, and the cooling time.

[0097] Exemplarily, first, determine the heat that needs to be removed from the steel plate according to the mass of the steel plate, the specific heat capacity of the steel plate, and the expected temperature drop. The purpose of this process is to calculate how much heat needs to be removed from the surface of the steel plate so that the temperature of the steel plate can be reduced to the predetermined stamping forming temperature range during the cooling process. This is a key step to ensure the effectiveness of the cooling process and avoid the impact of overheating or overcooling on formability.

[0098] The above content is expressed as:

[0099] Q = m s × c s × ΔT

[0100] where Q is the heat to be removed from the steel plate, m s is the mass of the steel plate, c s is the specific heat capacity of the steel, and ΔT is the expected temperature drop.

[0101] m s = ρ s × V s = ρ s × A s × d

[0102] A s = W × L

[0103] where ρ s is the density of the steel plate, V s is the volume of the steel plate, A s is the surface area of the steel plate, d is the thickness of the steel plate, W is the width of the steel plate, and L is the length of the steel plate.

[0104] Next, based on the inner aperture diameter and the number of holes in the bellows, the total hole area is calculated. The total hole area determines the distribution and flow velocity of the cooling medium flow rate, thereby affecting the cooling effect. A larger total hole area can increase the air flow rate, and thus enhance the cooling capacity. A reasonable hole design helps to ensure that the cooling medium can evenly cover the surface of the steel plate, avoiding uneven cooling or local overcooling.

[0105] The above content is expressed as:

[0106]

[0107] Among them, A h is the total hole area, d h is the aperture size, and N h is the number of holes.

[0108] Then, based on the blowing height and the horizontal distance from the nozzle to the steel plate, the blowing angle efficiency coefficient is determined. The blowing angle efficiency coefficient reflects how the angle and distance between the nozzle and the steel plate affect the cooling effect when spraying the cooling medium. Adjusting the blowing angle can optimize the efficiency of the contact between the cooling medium and the steel plate surface, thereby increasing the cooling rate. A reasonable blowing angle can ensure that the cooling medium is evenly sprayed onto the steel plate surface, avoiding the generation of cooling dead zones.

[0109] The above content is expressed as:

[0110]

[0111] Among them, η θ is the blowing angle efficiency coefficient, H b is the blowing height, D is the horizontal distance from the nozzle to the steel plate, and the blowing height and the horizontal distance determine the blowing angle θ.

[0112] Finally, by combining the heat removed from the steel plate, the total hole area, the blowing angle efficiency coefficient, the specific heat capacity of the cooling medium, the temperature of the cooling medium, the surface temperature of the steel plate, and the cooling time mentioned above, the blowing speed of the bellows can be calculated. The magnitude of the blowing speed determines the flow velocity of the cooling medium and directly affects the heat exchange efficiency on the steel plate surface. A higher blowing speed can remove heat more quickly, but at the same time, it is necessary to balance the requirements of the cooling speed and formability to avoid excessive stress concentration or deformation of the material caused by too high a cooling rate. By calculating the blowing speed, the efficiency and uniformity of the cooling process can be ensured, thereby achieving an ideal pre-cooling effect.

[0113] The above content is expressed as:

[0114]

[0115] Among them, V b is the blowing speed of the bellows, c ais the specific heat capacity of the cooling medium, T a is the temperature of the cooling medium, T s is the temperature of the steel plate surface, t c is the cooling time, η θ is the air jet angle efficiency coefficient.

[0116] The above formula is determined based on the law of conservation of energy,

[0117] The energy balance equation is expressed as:

[0118]

[0119] Cooling medium mass flow rate is expressed as:

[0120]

[0121] where Q is the heat carried away by the cooling air during the cooling process, representing the heat lost by the steel plate; the mass flow rate represents the mass of air passing through the cooling system per unit time, and the mass flow rate directly affects the cooling effect. The larger the mass flow rate, the more heat is carried away. The heat on the steel plate is transferred to the cooling air by convection. The heat absorbed by the air depends on the mass flow rate of the air, the specific heat capacity of the air, the temperature difference between the steel plate and the air, and the cooling time.

[0122] The technical solution of the present application will be further described in detail below through specific embodiments.

[0123] The length L of the steel plate is 1 m, the width W is 0.5 m, the thickness d is 0.001 m, and the initial steel plate temperature T s is 900 °C (1173 K), the target steel plate temperature T f is 750 °C (1023 K), the cooling medium temperature T a is 25 °C, i.e., 298 K, the density ρ of steel s is 7850 kg / m 3 , the density ρ of the cooling medium a is 1.184 kg / m 3 , the specific heat capacity c of the cooling medium a is 1005 J / (kg×K), the specific heat capacity c of steel s is 500 J / (kg×K), the cooling time t c is 4 s, the pore size d h is 0.01 m, the number of holes N h is 100, and the air jet angle θ is 45°.

[0124] Calculate the heat Q to be removed, expressed as:

[0125] ΔT = Ts -T f = 150K

[0126] A s = L × W = 1 × 0.5 = 0.5 m 2

[0127] m s = ρ s × A s × d = 7850 × 0.5 × 0.001 = 3.925 kg

[0128] Q = m s × c s × ΔT = 3.925 × 500 × 150 = 294375 J

[0129] Calculate the total hole area A h , expressed as:

[0130]

[0131] Calculate the air box jet velocity V b , expressed as:

[0132]

[0133] In summary, the process of obtaining the air box jet velocity is calculated by comprehensively combining the heat removal requirements of the steel plate, the air box hole design, the jet angle efficiency, and the flow characteristics of the cooling medium. This process ensures the uniformity and efficiency of the cooling effect, providing suitable temperature control conditions for subsequent hot stamping forming.

[0134] In some examples, it also includes:

[0135] Based on the steel plate specifications and jet velocity, control the pre-cooling duration to be less than or equal to a first preset time, so that the temperature difference between the steel plate after pre-cooling and the steel plate before pre-cooling is within a first preset range, where the above first preset range is greater than or equal to a first preset temperature and less than or equal to a second preset temperature.

[0136] Exemplarily, when controlling the pre-cooling duration, it is first necessary to accurately adjust according to the steel plate specifications and jet velocity. Larger steel plates generally require a longer pre-cooling time and may require a higher jet velocity to ensure that the surface temperature of the larger steel plate can be evenly reduced to a suitable range for stamping. Conversely, smaller steel plates can be cooled faster, so they require a shorter pre-cooling time and a moderate jet velocity. This adjustment based on the steel plate specifications and jet velocity ensures that the surface temperature of the steel plate can reach the expected temperature drop within the set time.

[0137] To ensure the effectiveness of the cooling process, the temperature difference between the steel plate after pre-cooling and before heating must be maintained within a specific range, namely the first preset range. This range is defined by two temperature values: the first preset temperature and the second preset temperature. The first preset temperature is the lowest temperature acceptable for the steel plate to ensure it does not become brittle due to excessive cooling; while the second preset temperature is the maximum allowable temperature to ensure the steel plate still has sufficient plasticity for subsequent stamping. By controlling the pre-cooling duration so that the temperature difference of the steel plate is between these two temperature values, it can be ensured that the steel plate is in a suitable temperature state before being transferred to the mold.

[0138] It should be noted that in the embodiment of the present application, the first preset time can be set to 4s, the first preset temperature can be set to 100 °C, and the second preset temperature can be set to 200 °C.

[0139] By this method, it is possible to dynamically adjust the pre-cooling duration according to the steel plate specifications, jet speed, and real-time temperature data, thereby ensuring the temperature control accuracy in each production process. This can not only improve the cooling efficiency and shorten the production cycle, but also ensure the part quality and formability in the hot stamping process, and avoid stamping failures or material damage caused by improper temperatures.

[0140] In some examples, the above pre-cooling treatment includes:

[0141] When it is detected that the steel plate exits the heating furnace, control the start and stop of the pre-cooling device, and perform jet cooling treatment on the above-mentioned steel plate.

[0142] Exemplarily, during the above pre-cooling treatment process, it is first necessary to monitor the temperature of the steel plate in real time after it exits the heating furnace. At this time, grating or thermal induction methods are used to detect the surface temperature of the steel plate. These methods can accurately capture the changes in the surface temperature of the steel plate and obtain temperature data in real time in a non-contact manner. The grating technology uses a laser beam to scan the surface of the steel plate and measure the temperature changes, while the thermal induction method captures the thermal radiation through infrared technology and then calculates the surface temperature of the steel plate. These detection means provide accurate temperature distribution data, providing a basis for the control of the subsequent pre-cooling process.

[0143] Based on the real-time monitoring results of the steel plate surface temperature, the system can automatically control the start and stop of the pre-cooling device. When the steel plate exits the furnace, the detection system starts the pre-cooling device according to the real-time temperature data and adjusts the jet speed and cooling time when necessary to ensure that the steel plate temperature can be reduced to the predetermined range. The pre-cooling device sprays a cooling medium, such as air flow or water mist, to quickly remove the excess heat on the surface of the steel plate and meet the temperature control requirements. Through this closed-loop control system, the pre-cooling process can be efficiently executed to ensure that the steel plate is in an ideal temperature state when entering the hot stamping die, and avoid forming defects or material damage caused by uneven or excessive temperatures.

[0144] In some examples, it further includes:

[0145] During the pre-cooling process of the steel plate, infrared imaging or laser scanning is used to monitor the surface temperature of the steel plate in real time. Based on the above surface temperature of the steel plate, the jet speed and cooling method are optimized to ensure uniform cooling of the steel plate.

[0146] Exemplarily, during the pre-cooling process of the steel plate, infrared imaging or laser scanning technology is used to monitor the surface temperature of the steel plate in real time. These technologies accurately detect the temperature distribution of each area on the surface of the steel plate in a non-contact manner. The infrared imaging device can capture the temperature changes on the surface of the steel plate through thermal radiation, generate a temperature distribution image, and provide comprehensive temperature data; while the laser scanning system accurately measures the temperature of specific points on the surface of the steel plate through laser beams. These real-time monitoring data can reflect the thermal state of different areas of the steel plate, providing a basis for the subsequent cooling process.

[0147] Based on the surface temperature data of the steel plate obtained in real time, the system can optimize the jet speed and cooling method. By analyzing the temperature differences in different areas, the system can dynamically adjust the injection parameters of the cooling medium, such as jet speed, jet angle, and jet air volume, to ensure uniform distribution of the cooling medium on the surface of the steel plate and achieve the best cooling effect. For areas with higher temperatures, the system can increase the jet speed or extend the injection time; for areas with lower temperatures, the jet speed is appropriately reduced to avoid uneven cooling or overcooling. Through this intelligent temperature control optimization, it can ensure that the steel plate cools evenly during the pre-cooling process, thereby improving the forming quality and avoiding stamping defects caused by uneven temperature.

[0148] In some examples, it further includes:

[0149] Before the stamping forming operation after the pre-cooling operation ends, the steel plate is controlled to stand still for a second preset time so that the temperature of the steel plate is less than or equal to the preset stamping temperature.

[0150] Exemplarily, after the pre-cooling operation ends and before the steel plate enters the stamping forming operation, a standing still stage is required. The core purpose of this stage is to ensure that the temperature of the steel plate is within an ideal range when it enters the stamping die. Specifically, the steel plate is controlled to stand still for a second preset time, and the setting of this time period is determined according to the temperature drop rate of the steel plate and material characteristics. Through a reasonable standing still time, the temperature of the steel plate will be further stabilized, avoiding the occurrence of LME phenomenon due to too high temperature, and ensuring uniform temperature on the surface and inside of the steel plate, meeting the requirements for stamping.

[0151] The goal of the static stage is to keep the temperature of the steel plate less than or equal to the preset stamping temperature, which helps to avoid the steel plate becoming too soft due to excessive temperature during the subsequent stamping process, affecting formability and part accuracy. At the same time, the static period also helps to eliminate the temperature gradient that may occur during the pre-cooling process, ensuring the uniformity and stability of the steel plate when it enters the die. By precisely controlling the static time and temperature, the stamping process can be optimized, reducing material defects or stamping failures caused by inappropriate temperature, thereby improving the quality and production efficiency of the final part.

[0152] It should be noted that in the embodiment of the present application, the second preset time can be set to 2s.

[0153] In some examples, it further includes:

[0154] In this pre-cooling method, cooling is mainly achieved through an air knife and an air box device. The air knife is a slender strip-shaped air outlet, similar to the shape of a knife edge, which can generate a strong and concentrated air flow to quickly remove the heat from the surface of the steel plate. The core parameters of the air knife device include air velocity, knife-edge width, knife-edge length, etc., and these parameters will directly affect the cooling efficiency. The air knife is usually arranged at the outlet position of the hot-formed steel billet to ensure that the hot steel plate can be effectively cooled immediately after coming out of the heating furnace. To achieve the best cooling effect, the number of air knives is generally not less than 1, and these parameters need to be precisely optimized through simulation analysis to ensure the uniformity and efficiency of the cooling process. In addition, a gas recovery device is set on both sides of the knife edge, which can effectively recover the air flow generated during the cooling process, improve the air flow utilization rate and reduce energy waste.

[0155] The air box device similar to the air knife is also applicable to the method proposed in this application, aiming to achieve a more uniform cooling effect. The air box is internally designed with partitions, and different-sized small holes are provided on the partitions to control the spraying distribution of the cooling medium. Such a design can ensure that the flow of the cooling medium through the air box is more uniform, avoiding problems such as local over-cooling or insufficient cooling, so as to ensure that the temperature of the steel plate surface can be stably reduced to the predetermined range. The design of the air box device takes into account factors such as air volume and air spraying angle. Through reasonable aperture design, the cooling effect is optimized, and at the same time, the disturbance of the air flow inside the air box is reduced, improving the cooling efficiency. This cooling scheme that comprehensively applies the air knife and the air box can efficiently adjust the temperature in actual production and provide an ideal steel plate state for subsequent hot stamping.

[0156] In some examples, it further includes:

[0157] The injection medium is mainly jet air, and other media such as water mist or dry ice are used according to actual production requirements. Different cooling media have different effects on the cooling effect, especially in terms of injection speed and cooling efficiency. Therefore, before actual production, it is necessary to determine the optimal injection speed through tests. This is because the jet speed is directly related to the heat exchange efficiency between the cooling medium and the steel plate surface, which in turn affects the temperature drop rate of the steel plate. If different media such as water mist or dry ice are used, the injection speed also needs to be adjusted to ensure that the cooling process is both efficient and uniform, avoiding affecting the quality of the parts or causing unnecessary material damage due to uneven cooling.

[0158] In some examples, it also includes:

[0159] The number of air knives and air boxes, and their configuration needs to be reasonably set according to the size and thickness of the actual parts. For parts with smaller size or thinner thickness, since their heat is relatively easy to be carried away by the air cooling process, usually 1 air knife or air box can meet the cooling requirements. However, for parts with larger size and thicker thickness, the cooling capacity of a single air knife or air box may not be sufficient to cover the entire surface. At this time, the number of air knives or air boxes can be increased to improve the cooling efficiency. Generally, the number of air knives and air boxes is set to 1 to 3. According to specific production conditions and the size requirements of the parts, the number can be appropriately increased to ensure that the steel plate can be cooled evenly and effectively before entering the mold. By flexibly configuring the number of air knives and air boxes, the best cooling effect can be achieved in different production scenarios, improving the stamping forming quality of the parts.

[0160] In some examples, it also includes:

[0161] Based on the consideration of cooling uniformity, a wind guiding plate can also be set inside the air box to guide the air flow distribution and direction entering the air box. The schematic cross-sectional view and three-dimensional view of the air box provided by the embodiment of the present application are shown in Figure 2(a) and Figure 3 as shown. Among them, the air inlet 1 is located at the top of the air box for introducing external air; the internal pipeline 2 connects the air inlet 1 and the inside of the box body 3, responsible for guiding the air into the air box; the box body 3 is the main part of the air box, usually made of high-temperature resistant materials to meet the working requirements in a high-temperature environment; the wind guiding plate 4 is located inside the box body 3 for guiding and adjusting the air flow direction; the air outlet 5 is located at the bottom of the air box for discharging the cooled air. As shown in Figure 2(b), on the basis of the above content, an internal air duct 6 can also be set to further make the air flow change direction multiple times inside the box, increasing the contact area between the air flow and the steel plate and improving the cooling efficiency.

[0162] Exemplarily, air enters the bellows from the air inlet 1 at the top. The air inlet 1 is usually equipped with a filter device to ensure that the incoming air is clean and reduce the impact of impurities on the cooling effect. The incoming air is guided to the main part of the bellows through the internal duct 2. The design of the internal duct 2 ensures smooth airflow, reduces resistance, and improves cooling efficiency. The air entering the main part of the bellows is guided and adjusted by the air guide plate 4. The air guide plate 4 is located inside the box body 3. Its design purpose is to ensure that the cooling airflow can be evenly distributed and cover the surface of the steel plate to be cooled. The design of the air guide plate 4 usually considers the uniformity of the airflow and the cooling effect, and adopts an adjustable design to meet different cooling requirements. Through the guidance of the air guide plate 4, the airflow is evenly distributed to various parts of the steel plate to ensure the uniformity and efficiency of the cooling process. Under the guidance of the air guide plate 4, the cooling airflow evenly covers the surface of the steel plate, takes away the heat of the steel plate through heat exchange, and achieves a cooling effect. The cooled air is discharged from the bellows through the air outlet 5 at the bottom. The design of the air outlet 5 ensures smooth discharge of the airflow, reduces the internal air pressure, and improves the cooling efficiency. The entire process ensures uniform temperature of the steel plate during cooling by precisely controlling the direction and speed of the airflow, thereby improving the cooling effect and part quality. The internal air duct 6 adopts a multi-layer structure design, which can better guide the airflow and ensure that the airflow is evenly distributed in the box. The multi-layer air duct design allows the airflow to change direction multiple times in the box, increasing the contact area between the airflow and the steel plate, thereby improving the cooling effect.

[0163] The technical solution of the present application is further described in detail below through specific embodiments, wherein Table 1 is a comparison result of steel plates with and without pre-cooling.

[0164] Table 1 Comparison results between precooling and non-precooling

[0165] Thickness / mm Heating temperature / °C Insulation time / min Maximum temperature / °C Example 1 1 910 5 637 Example 2 1.6 910 5 679 Example 3 1.9 910 5 735 Comparative Example 1 1 910 5 710 Comparative Example 2 1.6 910 5 783 Comparative Example 3 1.9 910 5 802

[0166] The examples and comparative examples in Table 1 respectively show the different performances of the steel plate during processes such as heating, heat preservation, and cooling. Each example describes the change in the maximum temperature of steel plates with different thicknesses under the same heating temperature and the same heat preservation time. By comparing the maximum temperature differences between the examples and the comparative examples, the actual effect of this method can be further analyzed. In Example 1, after the pre-cooling treatment of the steel plate, through heating and heat preservation, the finally reached maximum temperature is relatively low, indicating that the pre-cooling effectively reduces the temperature of the steel plate and may help improve the stability of the subsequent forming process. In Example 2, after the pre-cooling of the thicker steel plate, the temperature is lower compared to Comparative Example 2, indicating that the pre-cooling treatment can effectively control the temperature of steel plates with different thicknesses. In Example 3, although the steel plate has a larger thickness, the pre-cooling treatment still effectively reduces the final maximum temperature, but the temperature is still higher compared to the thinner steel plate. This shows that with the increase in the sheet thickness, the pre-cooling effect will be different, but it is still better than the comparative data without pre-cooling.

[0167] As can be seen from the above data analysis, the maximum temperatures reached by steel plates with different thicknesses after heating and heat preservation are all lower than the data of the comparative group without pre-cooling. This indicates that the method proposed in this application can effectively increase the cooling rate of the steel plate, thereby reducing the initial forming temperature when the sheet enters the mold. It is of great significance for temperature control management, material property optimization, and prevention of forming defects during the steel plate forming process.

[0168] Please refer to Figure 4 , which is a schematic structural diagram of a processing control device for a hot-formed steel part provided by an embodiment of this application, including:

[0169] A temperature detection unit 21, used to obtain the temperature distribution on the surface of the zinc-based coating hot-formed steel plate;

[0170] A cooling treatment unit 22, used to perform pre-cooling treatment on the surface of the zinc-based coating hot-formed steel plate based on the above temperature distribution and the air-cooling control model to obtain a steel plate to be stamped, wherein the air-cooling control model includes an air knife parameter model and an air box parameter model;

[0171] A stamping and forming unit 23, used to perform stamping and forming and pressure maintaining and quenching on the steel plate to be stamped to obtain a zinc-based coating hot-formed steel part.

[0172] Please refer to Figure 5 , an embodiment of this application also provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored on the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, it implements the steps of any of the methods for processing control of the above-mentioned hot-formed steel part.

[0173] Since the electronic device introduced in this embodiment is the device adopted by a processing control device for a hot-formed steel part in the embodiments of the present application, based on the method introduced in the embodiments of the present application, those skilled in the art can understand the specific implementation manners of the electronic device in this embodiment and their various forms of variation. Therefore, the specific implementation of how this electronic device implements the method in the embodiments of the present application will not be described in detail here. As long as the device adopted by those skilled in the art to implement the method in the embodiments of the present application belongs to the scope protected by the present application.

[0174] In the specific implementation process, when the computer program 311 is executed by the processor, it can implement any implementation manner in the corresponding embodiments of the first aspect.

[0175] It should be noted that in the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0176] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0177] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0178] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0179] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide for implementing the process Figure 1 one process or multiple processes and / or blocks Figure 1 the steps of the functions specified in one block or multiple blocks.

[0180] The embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions run on a processing device, the processing device is caused to execute Figure 1 the process corresponding to a processing control method for a hot-formed steel part in the corresponding embodiment.

[0181] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, a computer, a server, or a data center to another website, a computer, a server, or a data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be stored by a computer or a data storage device such as a server, a data center, etc. that integrates one or more available media. The available medium can be a magnetic medium, an optical medium, or a semiconductor medium, etc.

[0182] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be described herein again.

[0183] In several embodiments provided by the present application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling, direct coupling, or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of devices or units can be in electrical, mechanical, or other forms.

[0184] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0185] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0186] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories, random access memories, magnetic disks, or optical discs, and other media that can store program codes.

[0187] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

[0188] Although the preferred embodiments of the present specification have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present specification.

[0189] Obviously, those skilled in the art can make various changes and deformations to the present specification without departing from the spirit and scope of the present specification. Thus, if these modifications and variations of the present specification fall within the scope of the claims of the present specification and their equivalent technologies, the present specification is also intended to include these modifications and variations.

Claims

1. A processing control method for hot-formed steel parts, characterized in that: The method comprises: Obtain the temperature distribution on the surface of zinc-coated hot-formed steel sheet; Based on the temperature distribution and the air cooling control model, the surface of the zinc-based coated hot-formed steel plate is pre-cooled to obtain a steel plate to be stamped, wherein the air cooling control model includes an air knife parameter model and a bellows parameter model; The steel plate to be stamped is subjected to stamping forming and pressure-maintaining quenching to obtain a zinc-based coated hot-formed steel part.

2. The processing control method of hot-formed steel parts according to claim 1, characterized in that: When the current air cooling control model is the air knife parameter model, the specific steps of obtaining the air knife jet speed include: Determine the amount of heat removed from the steel plate based on the steel plate mass, specific heat capacity of the steel plate, and expected temperature drop; Determining a convective heat transfer coefficient based on the heat removed from the steel plate, the surface area of ​​the steel plate, the surface temperature of the steel plate, the temperature of the cooling medium, and the cooling time; Determining a cooling medium Reynolds number based on the convection heat transfer coefficient, the length of the steel plate, the cooling medium Prandtl number and the cooling medium thermal conductivity; The air knife jet velocity is determined based on the cooling medium Reynolds number, the steel plate length, the cooling medium dynamic viscosity and the cooling medium density.

3. The processing control method of hot-formed steel parts according to claim 1, characterized in that: When the current air cooling control model is the bellows parameter model, the specific steps of obtaining the bellows jet speed include: Determine the amount of heat removed from the steel plate based on the steel plate mass, specific heat capacity of the steel plate, and expected temperature drop; Based on the hole diameter and the number of holes, determine the total hole area; Determine the efficiency coefficient of the air jet angle based on the air jet height and the horizontal distance from the nozzle to the steel plate; The air box jet velocity is determined based on the heat removed from the steel plate, the total area of ​​the holes, the efficiency coefficient of the air jet angle, the specific heat capacity of the cooling medium, the cooling medium temperature, the surface temperature of the steel plate and the cooling time.

4. The processing control method of hot-formed steel parts according to claim 2 or 3, characterized in that: Also includes: Based on the steel plate specifications and the jet speed, the precooling duration is controlled to be less than or equal to a first preset time so that the temperature difference between the steel plate after precooling and the steel plate before precooling is between a first preset range, wherein the first preset range is greater than or equal to the first preset temperature and less than or equal to the second preset temperature.

5. The processing control method of hot-formed steel parts according to claim 1, characterized in that: The pre-cooling process comprises: When it is detected that the steel plate comes out of the heating furnace, the start and stop of the pre-cooling device are controlled to perform jet cooling treatment on the steel plate.

6. The processing control method of hot-formed steel parts according to claim 1, characterized in that: Also includes: During the pre-cooling process of the steel plate, infrared imaging or laser scanning is used to monitor the surface temperature of the steel plate in real time, and based on the surface temperature of the steel plate, the jet speed and cooling method are optimized to ensure uniform cooling of the steel plate.

7. The processing control method of hot-formed steel parts according to claim 1, characterized in that: Also includes: After the pre-cooling operation is completed and before the stamping operation is performed, the steel plate is controlled to stand still for a second preset time so that the temperature of the steel plate is less than or equal to the preset stamping temperature.

8. A processing control device for hot-formed steel parts, characterized in that: include: A temperature detection unit, used to obtain the temperature distribution on the surface of the zinc-based hot-formed steel plate; A cooling treatment unit, used for pre-cooling the surface of the zinc-based coated hot-formed steel plate based on the temperature distribution and the air cooling control model to obtain a steel plate to be stamped, wherein the air cooling control model includes an air knife parameter model and a bellows parameter model; The stamping unit is used to perform stamping and pressure-holding quenching on the steel plate to be stamped to obtain zinc-based coated hot-formed steel parts.

9. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is used to implement the steps of the processing control method for a hot-formed steel part as described in any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the processing control method of the hot-formed steel part according to any one of claims 1 to 7 is implemented.

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