Method for manufacturing random waterway hot stamping die based on 3D cladding technology and die

Abstract

The invention relates to a method for manufacturing a shape follow-up waterway of a thermal forming die based on a 3D cladding technology. The method comprises the steps that a hot stamping shape follow-up waterway die contour is preprocessed and cast; carrying out cladding by adopting a five-axis linkage CNC cladding machine to form a random water path; the temperature and a molten pool are monitored, and the cladding quality is checked; and after laser cladding is completed, the mold is subjected to finish machining through a CNC machine tool. According to the hot stamping random waterway mold, a waterway system is tailored according to the specific shape of the mold and the actual requirement of a product by means of the 3D cladding technology. Due to the adoption of the technology, the limitation of the traditional waterway design is thoroughly broken through, the waterway arrangement is more scientific and reasonable, the cooling efficiency is greatly improved, the injection molding period is shortened, and the overall production efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mold processing, and particularly relates to a method for manufacturing a conformal water channel hot stamping mold based on 3D cladding technology. Background Art

[0002] With the continuous development of the manufacturing industry, the demand for high-efficiency and precision molds in the production process is increasing day by day. The cooling water channel can realize the efficient stamping forming of metal sheets during the hot stamping process, ensure the cooling of the sheet material in a short time, and obtain sufficient phase transformation. However, the traditional water channels are basically made by machining processes such as milling machines, and it is difficult to produce water channels with bending deformation. The water channels cannot be arranged along the conformal surface, and the cooling efficiency is relatively low. Summary of the Invention

[0003] Aiming at the limitations in the prior art, the present invention aims to provide a method for manufacturing a conformal water channel hot stamping mold based on 3D cladding technology, so as to realize the more flexible and efficient manufacturing of complex-structured water channel hot stamping molds to meet the needs of the manufacturing industry for high-quality and high-performance molds.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a method for manufacturing a conformal water channel hot stamping mold by 3D cladding technology, which is characterized by including the following steps:

[0006] Step 1: Perform pre-processing on the mold base by milling out the rough mold blank and grinding out the plane reference; then install the pre-processed rough mold blank on the numerical control machine tool for rough machining to mill out the general contour of the mold; then perform quenching process through a vacuum quenching furnace and tempering process through an atmosphere tempering furnace;

[0007] Step 2: Perform surface cleaning and surface roughening treatment on the mold base obtained in Step 1;

[0008] Step 3: Start the laser cladding machine, initialize the equipment, load the cladding program, set the key parameters of cladding, and adjust the auxiliary parameters;

[0009] Step 4: Place the mold base obtained in Step 2 on the working table of the laser cladding machine, adjust the position and angle of the mold base, and then preheat the mold base;

[0010] Step 5: Start the laser cladding head to perform laser cladding operation on the mold base, so as to form a conformal water channel on the mold base; during the laser cladding process, monitor the temperature of the surface of the mold in real time to prevent overheating or uneven cooling, and at the same time monitor the formation of the molten pool in real time to ensure the stability and uniformity of the molten pool, finely adjust parameters such as laser power, powder spraying amount, and cladding speed, and regularly check the cladding quality;

[0011] Step Six: After the cladding is completed, let the mold cool down;

[0012] Step Seven: Send the cooled mold back to the CNC machine tool for finish machining.

[0013] Furthermore, in the method for manufacturing a conformal cooling channel hot stamping die by 3D cladding technology provided by the present invention, it can also have the following characteristics: The key parameters set in Step Three for cladding include: the laser power is set to 650 - 3000 W, the cladding speed is adjusted to 480 - 1000 mm / min to ensure that the laser beam is focused on the surface of the mold substrate; the powder spraying parameters are set, the powder spraying amount is 3 - 10 g / min, the powder spraying mode is concentrated local spraying to ensure that the powder is evenly distributed in the cladding area; the powder disk rotation speed is 0.6 - 10 r / min, the overlapping rate is 50%, the Z-axis lifting amount per layer is 0.45 - 1 mm, and the scanning spacing is 0.8 - 1.5 mm; the auxiliary parameters are adjusted including: the nozzle angle is adjusted to 70 - 90° to make the laser cladding head irradiate the surface of the mold substrate, and the gas flow rate is adjusted to 15 - 20 L / min.

[0014] Furthermore, in the method for manufacturing a conformal cooling channel hot stamping die by 3D cladding technology provided by the present invention, it can also have the following characteristics: A hot work die steel metal wire is used as the printing material for 3D cladding; the mold substrate is made of steel.

[0015] Furthermore, in the method for manufacturing a conformal cooling channel hot stamping die by 3D cladding technology provided by the present invention, it can also have the following characteristics: The preheating temperature in Step Four is 400 - 500 °C to promote the bonding between the cladding material and the mold substrate.

[0016] Furthermore, in the method for manufacturing a conformal cooling channel hot stamping die by 3D cladding technology provided by the present invention, it can also have the following characteristics: The surface temperature of the mold is monitored in real time in Step Five to control the temperature within 2000 - 2200 °C.

[0017] Furthermore, in the method for manufacturing a conformal cooling channel hot stamping die by 3D cladding technology provided by the present invention, it can also have the following characteristics: In Step One, the quenching process uses a rapid cooling medium for quenching, and this rapid cooling medium is oil. The tempering process temperature range is 560 °C - 600 °C to improve the hardness and toughness of the mold.

[0018] Furthermore, in the method for manufacturing a conformal cooling channel hot stamping die by 3D cladding technology provided by the present invention, it can also have the following characteristics: The laser cladding machine uses a five-axis linkage CNC cladding machine.

[0019] Furthermore, in the method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology provided by the present invention, it may further have the following feature: The conformal water channels are uniformly arranged longitudinally and penetrate the die base transversely.

[0020] Furthermore, in the method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology provided by the present invention, it may further have the following feature: The diameter of the conformal water channels is 6 - 8 mm, and the interval between adjacent conformal water channels is 18 - 20 mm.

[0021] Furthermore, in the method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology provided by the present invention, it may further have the following feature: The distance from the center of the cross-section of the pipeline of the conformal water channels to the die surface is consistent.

[0022] Furthermore, in the method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology provided by the present invention, it may further have the following feature: The conformal water channels are 4 - 6 mm away from the die surface.

[0023] Furthermore, in the method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology provided by the present invention, it may further have the following feature: During the laser cladding process, the auxiliary gas is nitrogen or argon, and the flow rate range is 10 L / min to 20 L / min. The present invention optimizes the metallurgical bonding performance of the cladding material by adjusting the type and flow rate of the auxiliary gas.

[0024] Furthermore, in the method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology provided by the present invention, it may further have the following feature: During the laser cladding operation on the die base in step five, the laser cladding head is started, and the laser cladding head starts to spray powder. At the same time, the displacement device runs and moves to a predetermined position, and the displacement device is used to move the cladding head according to a predetermined path and speed to ensure the precise forming of the cladding area.

[0025] Furthermore, in the method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology provided by the present invention, it may further have the following feature: The cooling in step six is natural cooling of the die base or controlled cooling. Residual stress is reduced through the cooling treatment.

[0026] Furthermore, in the method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology provided by the present invention, it may further have the following feature: In step seven, the die is sent back to the CNC machine tool and is subjected to finish machining using a material rough polisher and a finish polisher. The surface and functional areas of the die are finish machined to ensure that the dimensional accuracy and surface finish meet the design standards.

[0027] The present invention also provides a hot stamping die manufactured by the above method for manufacturing a conformal water channel hot stamping die by the 3D cladding technology. The die has conformal water channels.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention provides a surface with high temperature resistance, wear resistance and corrosion resistance for the mold through laser cladding technology, effectively extending the service life of the mold.

[0030] 2. The present invention can accurately construct a complex conformal waterway structure through five-axis linkage cladding technology, which is difficult to achieve by traditional manufacturing methods such as casting or machining. Through laser cladding technology, a conformal waterway that meets the requirements of fluid mechanics can be directly generated on the mold surface, greatly improving the cooling effect of the mold, reducing the influence of thermal stress on the mold, and thereby improving the product quality and mold life in the hot stamping process.

[0031] 3. By precisely controlling the cladding thickness and powder spraying amount, the present invention avoids the material waste common in traditional casting or welding methods. The high precision of laser cladding can ensure that the coating only covers the areas that need to be strengthened, thus minimizing the waste of excess materials, and the performance of the mold can be optimized by precisely controlling the thickness of each layer of material in the design. Compared with traditional processing methods, the present invention significantly improves the material utilization rate and reduces the production cost.

[0032] 4. The shape of the cooling water channel of the present invention can change with the shape of the mold, and is no longer linear, which well solves the problem that the distance between the traditional cooling water channel and the mold cavity surface is inconsistent, maximizes the rational design and layout of the cooling water channel system, thereby achieving a uniform cooling effect, shortening the cooling time in the hot forming cycle, improving the quality of the formed product, making it closer to the outer surface, not restricted by the shape and structure of the part, and enabling the hot formed part to be uniformly cooled with higher cooling efficiency.

[0033] 5. By precisely controlling the temperature and cooling during the cladding process, the present invention makes the surface temperature of the mold uniform and the cooling process more stable, avoiding the common problem in the manufacture of hot stamping molds - residual stress. This not only improves the thermal stability of the mold and prevents the mold from deforming or cracking due to stress concentration problems. Compared with traditional cooling methods, the present invention provides a more precise and controllable cooling method, significantly improving the durability and reliability of the mold. Description of the Drawings

[0034] Figure 1 It is a flow chart of the method for manufacturing a conformal waterway hot stamping mold based on 3D cladding technology of the present invention;

[0035] Figure 2 It is an upper mold drawing of the conformal waterway in the present invention;

[0036] Figure 3It is the lower die drawing of the conformal water channel in the present invention;

[0037] Figure 4 It is the assembly drawing of the upper and lower dies of the conformal water channel in the present invention;

[0038] Figure 5 It is the 1 / 4 traditional water channel stamping assembly drawing in the prior art;

[0039] Figure 6 It is the 1 / 4 conformal water channel stamping assembly drawing in the present invention;

[0040] Figure 7 It is the temperature reduction distribution diagram of the highest temperature points of the conformal water channel and the traditional water channel upper die stamping in the present invention;

[0041] Figure 8 It is the temperature reduction distribution diagram of the highest temperature points of the conformal water channel and the traditional water channel lower die stamping in the present invention;

[0042] Figure 9 It is the distribution nephogram when the austenite ratio of the sheet material transformed into martensite is 0.35 in the conformal water channel of the present invention at the end of the stamping and mold closing stage:

[0043] Figure 10 It is the distribution nephogram when the austenite ratio of the sheet material transformed into martensite is 0.35 in the traditional water channel at the end of the stamping and mold closing stage;

[0044] Figure 11 It is the distribution nephogram when the austenite ratio of the sheet material transformed into martensite is 0.97 in the conformal water channel of the present invention at the end of the stamping and mold closing stage;

[0045] Figure 12 It is the distribution nephogram when the austenite ratio of the sheet material transformed into martensite is 0.97 in the traditional water channel at the end of the stamping and mold closing stage;

[0046] Figure 13 It is the comparison diagram of the martensite transformation degree at the same position of the sheet material of the traditional water channel and the conformal water channel. Markings in the figure: 1. Upper die base; 2. Conformal water channel; 3. Lower die base; 4. Conformal water channel; 5. Sheet material; 6. Stamping block; 7. Traditional water channel; 8. Traditional water channel. Specific embodiments

[0047] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments.

[0048] <Example>

[0049] Step 1: Blanking and rough machining

[0050] The mold base is made of steel. After blanking with a sawing machine, the rough blank of the mold is machined with a milling machine, and the plane reference is ground with a grinding machine. Subsequently, rough machining is carried out on a CNC machine tool to mill out the general contour of the mold. Then, the quenching process is carried out in a vacuum quenching furnace, and the tempering process is carried out in an atmosphere tempering furnace.

[0051] Step 2: Surface treatment

[0052] Use tools such as brushes and air guns to remove impurities, oil stains, dust, etc. on the surface of the mold base. Carry out surface roughening treatment with sandpaper or steel grit, remove impurities and oxide layers on the surface of the mold base, increase surface roughness, and ensure the adhesion of cladding.

[0053] Step 3: Equipment preparation

[0054] Use hot work die steel metal wire as the printing material for the five-axis CNC cladding machine. Start the five-axis CNC cladding machine for self-check and initialization, load the cladding program, and set the key parameters: the laser power is set to 650 - 3000W, adjust the cladding speed to 480 - 1000mm / min, ensure that the laser beam is focused on the surface of the mold base to achieve the best cladding effect. Set the powder spraying parameters, the powder spraying amount is 3 - 10g / min, the powder spraying mode is concentrated local spraying, ensure that the powder is evenly distributed in the cladding area. The powder disk rotation speed is 0.6 - 10r / min, the overlapping rate is 50%, the Z-axis lifting amount per layer is 0.45 - 1mm, and the scanning spacing is 0.8 - 1.5mm. Then adjust the auxiliary parameters, adjust the nozzle angle to 70 - 90°, so that the laser cladding head accurately irradiates the surface of the base, and the gas flow rate is adjusted to 15 - 20L / min.

[0055] Step 4: Clamping and preheating

[0056] Install the mold base on the working table of the five-axis linkage laser cladding machine, and start the sliding table module and the support plate to adjust the position of the three-jaw chuck, adjust the position and angle of the mold base, and ensure that the laser cladding head accurately irradiates the surface of the mold base. And adjust the preheating temperature to 400 - 500°C.

[0057] Step 5: Laser cladding

[0058] Start the laser cladding head, control the displacement device to run along the predetermined trajectory to complete the cladding, so that a conformal water channel is formed on the mold base. Monitor the temperature (2000 - 2200°C) and the quality of the molten pool in real time, and fine-tune the parameters when necessary according to the actual situation to ensure stable cladding.

[0059] Step 6: Cooling and finish machining

[0060] After the cladding is completed, let the mold base cool naturally or under control to reduce the residual stress. Finally, carry out finish machining on a CNC machine tool.

[0061] <Stamping Simulation Experiment>

[0062] Since it is difficult to directly measure the internal temperature field distribution and the martensitic transformation process of the conformal water channel manufactured based on the 3D cladding technology in the present invention by experimental means, it is impossible to intuitively display its performance advantages compared with the traditional water channel design. Therefore, the present invention uses the numerical simulation software LS-DYNA to precisely simulate and analyze the performance of the conformal water channel manufactured by the 3D cladding technology in the hot stamping process. By constructing a three-dimensional thermal-mechanical coupling simulation model of the conformal water channel and the traditional water channel, the transient temperature field distribution characteristics, cooling effect, and degree of martensitic transformation of the two in the hot stamping process are deeply studied.

[0063] Refer to Figure 2 and Figure 3 , Figure 2 are the upper die and the lower die of the hot stamping die with a conformal water channel in the present invention. The design parameters of the water channel are as follows: the distances between the water channel and the upper side wall of the die and between the side walls are both 4 mm, the diameter of the water channel is 6 mm, and the distance between the centers of adjacent water channels is 20 mm (as Figure 4 shown).

[0064] Refer to Figure 5 and Figure 6 , Figure 5 and Figure 6 respectively show the assembly situations of the traditional water channel and the conformal water channel dies. This assembly model will be used for hot stamping simulation and temperature distribution analysis.

[0065] 1. Stamping Simulation and Material Definition

[0066] The LS-DYNA simulation software is used to simulate the hot stamping process. To ensure the accuracy of the simulation results, according to the material properties and cross-sectional properties of the upper die, lower die, stamping block, and sheet metal, the material cards are set, and the corresponding definitions are made for each component and node set, so as to effectively organize and manage the materials, geometries, and boundary conditions in the model. At the same time, the global parameters and control parameters for adjusting and managing the entire simulation process are set. Through the reasonable setting of these parameters, the physical properties of the die and the sheet metal in the hot stamping process are accurately reflected in the simulation model. The simulation process is divided into three stages: 0 - 0.0901 s is the state before stamping, the stamping stage starts at 0.901 s, the stamping stops at 0.904 s, and 0.904 - 1.014 s is the cooling and pressure-holding stage after the die stamps the sheet metal (this time period is reduced by 100 times in the simulation, so the data in this time period is enlarged by 100 times during analysis).

[0067] 2. Cooling Effect Simulation and Analysis

[0068] Compare and analyze the cooling effects of traditional water channels and conformal cooling water channels. First, use simulation software to analyze the temperature distribution during the hot stamping process of molds with two types of water channel designs, and obtain the temperature curves of the molds with conformal cooling water channels and traditional water channels respectively, as Figure 7 and Figure 8 shown.

[0069] According to the simulation results, the highest stamping temperature of the upper mold with conformal cooling water channels is 556K, and the temperature drops to 361K after cooling for 10s after stamping; while the highest stamping temperature of the upper mold with traditional water channels is 582K, and the temperature drops to 371K after cooling for 10s after stamping. The highest stamping temperature of the lower mold with conformal cooling water channels is 535K, and the temperature drops to 398K after cooling for 10s; while the highest stamping temperature of the lower mold with traditional water channels is 543K, and the temperature drops to 412K after cooling for 10s.

[0070] It can be seen from the above data that the cooling effect of the mold with conformal cooling water channels is significantly better than that of the traditional water channels. Specifically, the conformal cooling water channels can effectively reduce the peak stamping temperature on the mold surface, and can more quickly reduce the mold temperature during the cooling process, reduce thermal stress, and significantly improve the cooling efficiency.

[0071] 3. Martensitic transformation analysis

[0072] In order to further verify the advantages and disadvantages of the cooling effect, in this embodiment, 22MnB5 steel is selected as the sheet material, and a martensitic transformation analysis is carried out on the comparison of the cooling effects of the two water channel designs. The martensitic transformation start temperature of this steel grade is between about 350°C and 400°C. Therefore, compare the process of the sheet material transforming from austenite to martensite under the two water channel designs.

[0073] As Figure 9 and Figure 10 shown, they are the distribution nephograms of the austenite proportion of 35% when the austenite of the sheet material transforms into martensite at the mold closing stage after stamping for the conformal cooling water channel and the traditional water channel respectively. It can be clearly seen from the figure that under the conformal cooling water channel design, the austenite proportion of the sheet material transformed into martensite is more, and the transformation distribution is more uniform.

[0074] As Figure 11 and Figure 12 shown, at the mold closing stage after stamping, they are the distribution nephograms of the austenite proportion of 97% when the austenite of the sheet material transforms into martensite. At this time, although the sheet materials of both the traditional water channel and the conformal cooling water channel have reached the martensitic transformation temperature, the transformation of the upper side wall area of the sheet material of the traditional water channel is insufficient, and the transformation degree is significantly lower than that of the conformal cooling water channel. This can be further verified by Figure 13 further Figure 13Shows the comparison curve of the martensite transformation degree of the sheet metal at the same position. Among them, the austenite of the conformal water channel sheet metal gradually transforms into martensite, and the transformation ratio is as high as 96.5%. While the traditional water channel sheet metal begins to gradually form martensite at 6 s, and the transformation ratio after the pressure holding ends is only 59.5%.

[0075] It can be seen from this that there is a significant under-transformation phenomenon in the side wall area of the sheet metal of the traditional water channel, while the conformal water channel effectively avoids this problem, making the martensite transformation of the sheet metal more uniform, and significantly improving the cooling efficiency and transformation efficiency.

[0076] 4. Analysis of the advantages of the conformal water channel

[0077] Through the above analysis, the significant advantages of the conformal water channel design in the hot stamping process can be summarized as follows:

[0078] High phase transformation efficiency: The conformal water channel design can significantly increase the transformation ratio of austenite to martensite, improving the mechanical properties and material toughness of the sheet metal.

[0079] Short transformation time: By optimizing the water flow path and increasing the contact area between the water flow and the die surface, the conformal water channel can trigger the phase transformation earlier, significantly shortening the production cycle.

[0080] Uniform tissue distribution: The more uniform cooling effect brought by the conformal water channel design helps to improve the reliability of the sheet metal, reduce the concentration of thermal stress, and enhance the consistency and accuracy of the product.

[0081] In summary, compared with the traditional water channel, the conformal water channel manufactured by the present invention based on the 3D cladding technology has higher cooling efficiency, more uniform temperature distribution, and shorter phase transformation time. In the hot stamping process, the conformal water channel can not only more quickly reduce the die temperature, reduce the risks of heat accumulation and thermal fatigue, but also significantly improve the material properties and transformation uniformity of the sheet metal, thereby improving the production efficiency and product quality. This technology has brought significant improvements to the design and application of hot stamping dies, and provided an important reference for the development of manufacturing technologies in related fields.

[0082] The above embodiments are only exemplary cases of the present invention and are not used to limit the protection scope of the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A method for manufacturing a conformal waterway hot stamping die using 3D cladding technology, characterized in that: The following steps are involved: Step 1: Pre-process the mold base by milling out the mold rough blank and grinding out the plane reference; then install the pre-processed mold rough blank on the CNC machine tool for rough processing to mill out the mold contour; then perform the quenching process in a vacuum quenching furnace, and then perform the tempering process in an atmosphere tempering furnace; Step 2: cleaning and roughening the surface of the mold substrate obtained in step 1; Step 3: Start the laser cladding machine, initialize the equipment, load the cladding program, set the key parameters of the cladding, and adjust the auxiliary parameters; Step 4: placing the mold substrate obtained in step 2 on a workbench of a laser cladding machine, adjusting the position and angle of the mold substrate, and then preheating the mold substrate; Step 5: Start the laser cladding head to perform laser cladding operation on the mold substrate, so that a conformal waterway is formed on the mold substrate; during the laser cladding process, monitor the surface temperature of the mold in real time, monitor the formation of the molten pool in real time, and check the cladding quality regularly; Step 6: After cladding is completed, let the mold cool; Step 7: Send the cooled mold back to the CNC machine for finishing.

2. The method for manufacturing a conformal waterway hot stamping die using 3D cladding technology according to claim 1, characterized in that: in, The key parameters for setting the cladding in step 3 include: setting the laser power to 650-3000W, adjusting the cladding speed to 480-1000mm / min, ensuring that the laser beam is focused on the surface of the mold substrate; setting the powder spraying parameters, the powder spraying amount is 3-10g / min, and the powder spraying mode is concentrated local spraying to ensure that the powder is evenly distributed in the cladding area; the powder disk speed is 0.6-10r / min, the overlap rate is 50%, the Z-axis lift of each layer is 0.45-1mm, and the scanning spacing is 0.8-1.5mm; The auxiliary parameters are adjusted to include: adjusting the nozzle angle to 70-90°, allowing the laser cladding head to irradiate the surface of the mold substrate, and adjusting the gas flow rate to 15-20 L / min.

3. The method for manufacturing a conformal waterway hot stamping die using 3D cladding technology according to claim 1, characterized in that: in, Use hot-working die steel metal welding wire as the printing material for 3D cladding; The mold substrate is made of steel.

4. The method for manufacturing a conformal waterway hot stamping die using 3D cladding technology according to claim 1, characterized in that: in, In step 5, the mold surface temperature is monitored in real time to control the temperature at 2000-2200°C.

5. The method for manufacturing a conformal waterway hot stamping die using 3D cladding technology according to claim 1, characterized in that: in, The conformal water channels are evenly arranged in the longitudinal direction and penetrate the mold base in the transverse direction.

6. The method for manufacturing a conformal waterway hot stamping die using 3D cladding technology as claimed in claim 5, characterized in that: in, The diameter of the conformal water channel is 6-8 mm, and the interval between adjacent conformal water channels is 18-20 mm.

7. The method for manufacturing a conformal waterway hot stamping die using 3D cladding technology as claimed in claim 5, characterized in that: in, The distance between the center of the cross section of the pipeline of the conformal water channel and the mold surface is consistent.

8. The method for manufacturing a conformal waterway hot stamping die using 3D cladding technology as claimed in claim 7, characterized in that: in, The conformal water channel is 4-6 mm away from the mold surface.

9. The method for manufacturing a conformal waterway hot stamping die using 3D cladding technology as claimed in claim 1, characterized in that: in, During the laser cladding process, the auxiliary gas is nitrogen or argon, and the flow rate range is 10L / min to 20L / min.

10. A hot stamping die manufactured by the method for manufacturing a hot stamping die with a conformal water channel using 3D cladding technology as claimed in any one of claims 1 to 9, wherein the die has a conformal water channel.

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