Hot bath stamping die and hot bath stamping method suitable for zinc-based coating door ring

Abstract

The invention relates to the technical field of hot stamping, and particularly provides a hot bath stamping die and a hot bath stamping method suitable for a zinc-based coating door ring, the hot bath stamping die comprises an upper die assembly and a lower die assembly, and the upper die assembly comprises an upper die base and an upper die forming male; the upper die forming male part is arranged on the upper die base, a cooling runner is arranged in the upper die forming male part, and the cooling runner is configured to reduce the temperature of the upper die forming male part within a preset time period; the lower die assembly comprises a lower die base, a lower die forming male part and a liquid bearing part. The lower die base and the upper die base are oppositely arranged. The lower die forming male part and the liquid bearing part are both arranged on the lower die base, and the lower die forming male part is used for being matched with the upper die forming male part to form a target part; the liquid bearing piece is arranged on the outer side of the lower die forming male part in a surrounding mode, and the target part is immersed in a pre-cooling medium of the liquid bearing piece in the forming process. According to the hot bath stamping die suitable for the zinc-based coating door ring and the hot bath stamping method, a pre-cooling medium is provided for pre-cooling and die cooling of a zinc-based coating material, and the high-performance integrated door ring is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of hot stamping, in particular to a hot bath stamping die and a hot bath stamping method suitable for a zinc-based plated door ring. Background Art

[0002] Door knockers are one of the key components in a car body, and the performance of door knockers is related to their manufacturing process and materials. In order to meet people's requirements for lightweight and safety of automobiles, one-piece welded door knockers formed by hot-formed steel stamping are widely used. Among hot-formed steels, zinc-based coated steel has attracted the attention of manufacturers due to its cathodic protection and good corrosion resistance. However, the existing zinc-based coated steel is not widely used in the integrated door knockers of the car body.

[0003] In the prior art, hot forming dies can only be used for one-piece door rings without coating or aluminum-silicon coating, or for small-sized zinc-based coated parts. When using existing dies to hot stamp zinc-based coated materials and produce one-piece door rings, it is often difficult to meet the zinc-based coated materials' requirements for multi-stage cooling, resulting in product performance that does not meet the requirements. Summary of the invention

[0004] The hot bath stamping die and hot bath stamping method suitable for zinc-based coated door rings provided in the embodiments of the present invention at least solve the problem that the existing die cannot meet the multi-stage cooling requirements of the zinc-based coated materials, resulting in product performance not meeting the requirements. It can provide pre-cooling medium pre-cooling and die cooling for the zinc-based coated materials to obtain a high-performance integrated door ring.

[0005] In the first aspect, the present invention provides a hot bath stamping die suitable for a zinc-based coated door ring, comprising an upper die assembly, the upper die assembly comprising an upper die base and an upper die forming pin; the upper die forming pin is arranged on the upper die base, and a cooling channel is arranged in the upper die forming pin, and the cooling channel is configured to reduce the temperature of the upper die forming pin within a preset time period; and a lower die assembly, the lower die assembly comprising a lower die base, a lower die forming pin and a liquid receiving part; the lower die base is arranged opposite to the upper die base; the lower die forming pin and the liquid receiving part are both arranged on the lower die base, and the lower die forming pin is used to cooperate with the upper die forming pin to form a target component; the liquid receiving part is arranged around the outer side of the lower die forming pin, and the material of the target component is immersed in the pre-cooling medium of the liquid receiving part during the forming process.

[0006] In one embodiment of the present invention, the height of the liquid receiving member is Satisfies the relationship: ,in, is the mold closing liquid level height, which is the liquid level height of the pre-cooling medium when the upper mold forming male and the lower mold forming male are molded together. The mold closing liquid level height is proportional to the length of the liquid receiving part. , the width of the liquid receiving member , the volume of the lower mold forming , the immersion volume of the upper mold forming rod during forming And the height of the highest point of the lower mold forming Related.

[0007] In one embodiment of the present invention, the lower mold assembly further includes: a filling piece, the filling piece is arranged in the target area; wherein the target area is an idle area in the liquid receiving part, and the volume of the filling piece is Satisfies the relationship: .

[0008] In one embodiment of the present invention, the lower mold assembly further includes: a liquid level detector, the liquid level detector is used to detect the real-time liquid level height of the pre-cooling medium; a first controller, the first controller is electrically connected to the liquid level detector, and the first controller is used to emit a stop signal when a preset height is less than the real-time liquid level height; wherein the stop signal includes a target duration, and the target duration Satisfies the relationship, , is the production rhythm, in seconds; and, a fluid replenisher, which is electrically connected to the first controller, and is used to transport the pre-cooling medium into the liquid receiving member; wherein the fluid replenisher is configured to stop transporting the pre-cooling medium after receiving the stop signal, and the duration of stopping the transport of the pre-cooling medium is the target duration.

[0009] In one embodiment of the present invention, the lower mold assembly further includes: a lifting piece, the lifting piece is arranged on the outer side of the lower mold forming male, and the lifting piece is used to carry the material of the target component; wherein the lifting height of the lifting piece is Satisfies the relationship: , .

[0010] In one embodiment of the present invention, the lower mold assembly also includes: a movable functional part, a through hole is opened on the lower mold base, and the driving end of the movable functional part is movably arranged in the through hole; wherein, the through hole includes two orifices, at least one of the orifices is provided with a receiving groove, and a sealing component is provided in the receiving groove.

[0011] In one embodiment of the present invention, an anti-overflow plate is provided at one end of the liquid receiving part away from the lower mold base, and the anti-overflow plate includes a fixed end and a free end, the fixed end is fixedly connected to the liquid receiving part, and the free end is provided on a side of the liquid receiving part close to the lower mold forming male, and the anti-overflow plate is used to prevent the pre-cooling medium from overflowing the liquid receiving part during the process of the lower mold forming male and the upper mold forming male cooperating to form.

[0012] In one embodiment of the present invention, the lower mold assembly also includes: a temperature detector, which is used to detect the real-time temperature of the pre-cooling medium; a second controller, which is electrically connected to the temperature detector, and is used to transmit an adjustment signal when the preset temperature is not equal to the real-time temperature; wherein the adjustment signal includes heating power; and a heater, which is arranged in the liquid receiving part, the heater is electrically connected to the second controller, and the heater is configured to heat the pre-cooling medium according to the adjustment signal.

[0013] In one embodiment of the present invention, a support is provided on both the upper die base and the lower die base, and a guide member and a guide limit portion corresponding to the guide member are provided on the support; wherein, during the process of the lower die forming pin and the upper die forming pin cooperating to form, the guide member abuts against the corresponding guide limit portion.

[0014] In a second aspect, the present invention further provides a hot bath stamping method suitable for zinc-based plated door rings, which is applied to the hot bath stamping method suitable for zinc-based plated door rings as described in any one of the above, comprising: setting a pre-cooling medium for the lower die assembly; wherein the lower die assembly comprises a lower die seat, a lower die forming pin and a liquid receiving part, the lower die forming pin and the liquid receiving part are both arranged on the lower die seat, the liquid receiving part is arranged around the outer side of the lower die forming pin, and the pre-cooling medium is arranged in the liquid receiving part; setting the material of the target component on the lower die assembly; wherein the material of the target component is immersed in the pre-cooling medium during the forming process; controlling the upper die assembly and the lower die assembly to close the mold so that the upper die forming pin of the upper die assembly cooperates with the lower die forming pin to form the target component; wherein the upper die assembly also comprises an upper die seat, the upper die seat is arranged opposite to the lower die seat, the upper die forming pin is arranged on the upper die seat, a cooling channel is arranged in the upper die forming pin, and the cooling channel is configured to reduce the temperature of the upper die forming pin within a preset time period.

[0015] The above technical solution of the present invention has the following beneficial effects compared with the prior art:

[0016] The hot bath stamping die and hot bath stamping method suitable for zinc-based coated door rings described in the present invention provide two-stage cooling for the forming of zinc-based coated door rings by arranging a cooling channel in the upper mold forming male and arranging a liquid receiving part outside the lower mold forming male to set a pre-cooling medium, thereby better realizing the "short-term heating, pre-cooling forming" process of zinc-based coated door rings, and effectively avoiding the LIME phenomenon of zinc-based coated steel materials. The overall production efficiency is high, the cost is low, and the quality of the finished product is good, and zinc-based coated door ring products with performance and size that meet the requirements can be produced. It can effectively increase the application ratio of zinc-based coated steel on automobile bodies, realize the mass production of welded integrated zinc-based coated door rings, and help the industry reduce costs and increase efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 It is a schematic structural diagram of a hot bath stamping die suitable for a zinc-based coated door ring in a preferred embodiment of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the upper mold assembly from a first perspective in a preferred embodiment of the present invention.

[0020] Figure 3 It is a second perspective structural schematic diagram of the upper mold assembly in the preferred embodiment of the present invention.

[0021] Figure 4 It is a schematic structural diagram of the lower mold assembly from the first perspective in a preferred embodiment of the present invention.

[0022] Figure 5 It is a second perspective structural schematic diagram of the lower mold assembly in the preferred embodiment of the present invention.

[0023] Figure 6 It is a third perspective structural schematic diagram of the lower mold assembly in the preferred embodiment of the present invention.

[0024] Figure 7 It is a schematic diagram of the structure of the control component in the preferred embodiment of the present invention.

[0025] Figure 8 It is a structural schematic diagram of the material lifting member in the preferred embodiment of the present invention.

[0026] Fig. 9 It is one of the cross-sectional structural schematic diagrams of the movable functional part in the preferred embodiment of the present invention.

[0027] Fig.10 This is the second schematic cross-sectional structure diagram of the movable functional part in the preferred embodiment of the present invention.

[0028] Fig.11 This is the third schematic cross-sectional structure diagram of the movable functional part in the preferred embodiment of the present invention.

[0029] Fig.12 It is a schematic flow chart of a hot bath stamping method suitable for a zinc-based coated door ring in a preferred embodiment of the present invention.

[0030] The above drawings include the following reference numerals:

[0031] 10. Upper mold assembly; 111. Upper mold base; 112. Upper mold pad; 12. Upper mold forming male; 121. Cooling channel; 14. Upper mold pressing block; 20. Lower mold assembly; 211. Lower mold base; 212. Lower mold pad; 2121. Through hole; 2122. Accommodating groove; 2123. Sealing component; 22. Lower mold forming male; 23. Liquid receiving part; 231. Anti-overflow plate; 2311. Fixed end; 2312. Free end; 232. Heat insulation component; 24. Filling Parts; 251, liquid level detector; 252, liquid replenisher; 26, lifting parts; 271, ejector block; 272, ejector pin; 273, lower mold pressing block; 274, driving part; 281, temperature detector; 282, heater; 291, support platform; 292, guide part; 2921, wear-resistant part; 293, guide limiter; 30, control part; 311, first controller; 312, second controller; 313, cable; 314, socket; 40, press. DETAILED DESCRIPTION

[0032] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0033] It should be noted that as one of the key components of a car body, the performance of the door knocker is related to its material and manufacturing process. As people's requirements for lightweight and safety of cars continue to increase, car door knockers are also constantly being updated.

[0034] As for the material selection of door knockers, compared with lightweight materials such as aluminum alloy and magnesium alloy, hot-formed steel not only meets the requirements of lightweight and safety performance, but also has a high cost-effectiveness. Therefore, the proportion of ultra-high-strength hot-formed steel in the car body continues to increase.

[0035] Among the existing hot-formed steels, the most commonly used are uncoated steel and aluminum-silicon coated steel. Among them, uncoated steel has oxidation and decarburization problems at high temperatures, which not only affects the life of the stamping die, but also has poor corrosion resistance. Although aluminum-silicon coated steel can improve the corrosion resistance of the product to a certain extent, the improvement is limited. Zinc-based coated steel has cathodic protection, so its corrosion resistance is more than three times that of aluminum-silicon coated steel. The raw material components of zinc-based coated steel belong to the existing technology and will not be elaborated here.

[0036] However, zinc-based coated steel is limited by the manufacturing process and is not widely used in existing body integrated door rings. In the prior art, hot forming molds can only adapt to uncoated or aluminum-silicon coated integrated door rings, or small-sized zinc-based coated parts.

[0037] Specifically, taking a certain door ring hot forming mold as an example, it improves the cooling effect by setting flow channels in the forming grooves of the upper and lower molds to ensure that the strength of the door ring meets the requirements after quenching. However, this mold only has a one-stage mold cooling, and the mold quenching cooling rate is relatively large. It is only suitable for uncoated steel and aluminum-silicon coated steel, and is not suitable for forming zinc-based coated steel door rings. When using this mold to produce zinc-based coated door rings, LMIE (Liquefied Metal Induced Embrittlement) is prone to occur, which in turn produces deeper microcracks.

[0038] Some molds also set up hot bath components to achieve pre-cooling during the stamping process of zinc-based coated plates, which effectively solves the problem of LMIE phenomenon in products. However, it is only suitable for simple, small-sized zinc-based coated plate parts. When facing large-sized body door rings, it also cannot meet the needs of multi-stage cooling.

[0039] In order to solve the problem that the existing mold cannot meet the multi-stage cooling requirements of zinc-based coating materials, resulting in product performance not meeting the requirements, refer to Figure 1 As shown, the present invention provides a hot bath stamping die suitable for zinc-based coated door rings, including an upper die assembly 10 and a lower die assembly 20. The upper die assembly 10 and the lower die assembly 20 cooperate to stamp the zinc-based coated material in a high-temperature hot bath to obtain a door ring.

[0040] Reference Figure 2 and Figure 3 As shown, the upper mold assembly 10 includes an upper mold base 111 and an upper mold forming male 12 .

[0041] The upper die holder 111 is used to set the corresponding components. When in use, the upper die holder 111 can be connected to a driving device to drive the driving device to achieve hot bath stamping. Exemplarily, the driving device is set as a press 40, and the upper die holder 111 is connected to the upper table of the press 40.

[0042] The forming pin is also called the forming punch. In the stamping die, the forming pin can cause the material to undergo plastic deformation to obtain a target component of a specific shape and size, such as a door knocker.

[0043] The upper die forming male 12 of the upper die assembly 10 is arranged on the upper die base 111 to follow the movement of the upper die base 111 and the driving device to achieve hot bath stamping.

[0044] Preferably, an upper die pad 112 is provided between the upper die forming pin 12 and the upper die seat 111 , and the height of the upper die can be adjusted by replacing different upper die pads 112 .

[0045] A cooling channel 121 is provided in the upper mold forming core 12 , and the cooling channel 121 is configured to reduce the temperature of the upper mold forming core 12 within a preset time period.

[0046] Specifically, during the hot bath stamping process, the upper die forming male 12 can provide die cooling for the material of the target component. However, the temperature of the target component material is high, and during the hot bath stamping process, the target component material deforms and generates heat, causing the temperature of the forming male to rise, and the die cooling effect is limited. By providing a cooling channel 121 in the upper die forming male 12, a cooling medium, such as a coolant, can be provided in the cooling channel 121 to achieve cooling of the upper die forming male 12 so that it maintains a uniform and stable temperature. On this basis, the target component material has a sufficient cooling rate, the production efficiency is improved, and the product performance and size can meet the requirements. In addition, the wall mold can be prevented from being damaged by overheating, thereby extending the service life of the mold.

[0047] Regarding the structure of the cooling channel 121, those skilled in the art can set it according to actual needs. For example, the cooling channel 121 can be set to a strip, ring, spiral, etc. In addition, those skilled in the art can set a corresponding control system according to actual needs to achieve on-off control of the cooling medium in the cooling channel 121, so as to achieve cooling in a preset time period. For example, during the entire hot bath stamping process, the cooling medium circulates in the cooling channel 121 to maintain cooling; or, the cooling medium is only introduced into the cooling channel 121 in a certain time period to achieve cooling.

[0048] Reference Figure 4 , Figure 5 and Figure 6 As shown, the lower mold assembly 20 includes a lower mold base 211 , a lower mold forming male 22 and a liquid receiving member 23 .

[0049] The lower die base 211 is also used to set corresponding components. When in use, the lower die base 211 can be connected to a driving device to be driven by the driving device to achieve hot bath stamping. Exemplarily, the lower die base 211 is connected to the lower table of the press 40, so that the lower die base 211 is arranged opposite to the upper die base 111, so as to facilitate the subsequent mold closing hot bath stamping.

[0050] The lower die forming male 22 and the liquid receiving part 23 are both arranged on the lower die base 211. The lower die forming male 22 is used to cooperate with the upper die forming male 12 to form a target component, such as a zinc-based plated door knocker. Taking the drive of the press 40 as an example, when the press 40 provides power, the upper die base 111 and the lower die base 211 are relatively close to each other, so that the upper die forming male 12 and the lower die forming male 22 contact the material of the target component. Under the action of the two forming males, the material undergoes plastic deformation, thereby obtaining a target component that matches the shape of the two forming males.

[0051] Preferably, a lower die pad 212 is provided between the lower die forming pin 22 and the lower die base 211, and the height of the lower die can be adjusted by replacing different lower die pads 212.

[0052] Preferably, both the upper mold forming male 12 and the lower mold forming male 22 are designed in blocks. By adopting the forming male with a block design, the cooling effect can be improved to a certain extent, the processing difficulty can be effectively reduced, the processing accuracy can be improved, and maintenance is convenient.

[0053] Preferably, the upper mold forming male 12 and the lower mold forming male 22 are both made of materials with high wear resistance, high temperature fatigue resistance and strong corrosion resistance to extend the service life.

[0054] The liquid receiving member 23 is arranged around the outer side of the lower mold forming male 22. Those skilled in the art can set the specific shape and size of the liquid receiving member 23 according to actual needs. Exemplarily, the liquid receiving member 23 is set as a square box-shaped structure.

[0055] A precooling medium is provided in the liquid receiving part 23, and the precooling medium is an oil-water mixture composed in a certain ratio. The precooling medium is provided in the liquid receiving part 23 before the material of the target component is provided, and reaches a preset temperature. Those skilled in the art can provide corresponding devices, such as a control part 30, according to actual needs, so as to heat the precooling medium in the liquid receiving part 23 to a preset temperature.

[0056] During the forming process, the material of the target component is immersed in the pre-cooling medium to be formed under the action of the pre-cooling medium, the upper mold forming male 12 and the lower mold forming male 22 .

[0057] It should be noted that the forming process includes two forming male molds and the period before that. Specifically, before the two forming male molds are not molded, the heated target component is placed in a precooling medium for precooling, and then the molds are closed for forming.

[0058] By providing a liquid receiving part 23 on the lower die seat 211 to provide a pre-cooling medium, the temperature of the material can be reduced during the process of forming the target component, and the oxide layer on the surface of the material can be cleaned, which can effectively avoid the LIME phenomenon of the zinc-based coated steel material. In addition, the lower die forming male 22 does not need to add an additional flow channel, which effectively reduces the time and cost of mold production and processing.

[0059] Those skilled in the art can set the height of the liquid receiving member 23 according to actual needs to set a corresponding volume of pre-cooling medium, thereby avoiding the problem of pre-cooling medium overflow during the mold closing hot bath stamping process and reducing unnecessary waste. In addition, corresponding devices, such as a control member 30, can also be set on the lower mold assembly 20 to monitor the liquid level of the pre-cooling medium in real time to prevent the pre-cooling medium from overflowing.

[0060] In actual hot bath stamping production, first, a pre-cooling medium is set in the liquid receiving member 23, and the temperature of the pre-cooling medium needs to reach a preset temperature.

[0061] Subsequently, the zinc-based coating door ring material is placed on the lower mold assembly 20 so that the zinc-based coating door ring material is immersed in the pre-cooling medium. The zinc-based coating door ring material is a material that has been heated by austenitization.

[0062] Next, the press machine 40 is controlled to move the upper mold assembly 10 and the lower mold assembly 20 relatively close to each other to achieve mold closing, and the zinc-based plated door ring is formed under the cooperation of the pre-cooling medium, the upper mold forming male 12 and the lower mold forming male 22. During the hot bath stamping process, the zinc-based plated door ring material remains immersed in the pre-cooling medium. At the same time, the cooling channel 121 is passed with the cooling medium in a preset time period to achieve temperature reduction.

[0063] Finally, after a certain period of pressure maintenance, the upper mold assembly 10 and the lower mold assembly 20 are separated to carry out unloading, and the processing of the zinc-based plated door ring is completed. When unloading, the unloading and handling can be carried out by a robotic arm. At the same time, a corresponding ejecting device can be provided for the lower mold assembly 20 so that the door ring is separated from the forming male.

[0064] The hot bath stamping die suitable for zinc-based coated door rings described in the present invention provides two-stage cooling for the forming of zinc-based coated door rings by arranging a cooling channel 121 in the upper mold forming male 12 and arranging a liquid receiving part 23 outside the lower mold forming male 22 to set a pre-cooling medium, thereby better realizing the process of "short-time heating, pre-cooling forming" of zinc-based coated door rings, and effectively avoiding the LIME phenomenon of zinc-based coated steel materials. The overall production efficiency is high, the cost is low, and the quality of the finished product is good, and zinc-based coated door ring products with performance and size that meet the requirements can be produced. It can effectively increase the application ratio of zinc-based coated steel on automobile bodies, realize the mass production of welded integrated zinc-based coated door rings, and help the industry reduce costs and increase efficiency.

[0065] The hot bath stamping die for zinc-based plated door knockers of the present invention, in some embodiments, has a height of the liquid receiving member 23 Satisfies the relationship:

[0066] .

[0067] in, is the mold closing liquid level height, It is the liquid level height of the pre-cooling medium when the upper mold forming male 12 and the lower mold forming male 22 are closed.

[0068] Mould closing liquid level height The length of the liquid receiving member 23 , the width of the liquid receiving member 23 , the immersion volume of the upper mold forming male 12 during molding And the height of the highest point of the lower mold forming male 22 Related. Specifically, the mold liquid level height It is expressed as:

[0069] .

[0070] The length of the liquid receiving member 23 , the width of the liquid receiving member 23 , the immersion volume of the upper mold forming male 12 during molding And the height of the highest point of the lower mold forming male 22 All are known quantities.

[0071] The mold closing liquid level height is calculated by the above parameters After that, at the mold closing liquid level height On the basis of the anti-overflow safety height, the overflow of pre-cooling medium can be avoided when the target parts are stamped in batches in hot bath, thereby reducing unnecessary waste and reducing production costs.

[0072] The anti-overflow safety height cannot be set too small. When the anti-overflow safety height value is too small, less than 10cm, it is difficult to effectively prevent overflow. The anti-overflow safety height cannot be set too large. When the anti-overflow safety height value is too large, greater than 20cm, although the pre-cooling medium can be prevented from overflowing, the excessively high liquid receiving part 23 has a low space utilization rate and is prone to interfere with other parts, which in turn reduces production efficiency.

[0073] When the anti-overflow safety height is set at 10 to 20 cm, both the anti-overflow effect and high space utilization can be well taken into account. Those skilled in the art can set specific anti-overflow safety height values ​​according to actual needs, such as 10 cm, 11 cm, 12 cm, 13 cm, 14 cm, 15 cm, 16 cm, 17 cm, 18 cm, 19 cm, 20 cm, etc.

[0074] Furthermore, in the hot bath stamping die for the zinc-based coated door knocker of the present invention, in some embodiments, the height of the liquid receiving member 23 is Satisfies the relationship:

[0075] .

[0076] in, The height of the highest point of the lower mold forming male 22, is the height of the material taking piece, preferably, the material taking piece is configured as a manipulator; It is the height of the lowest surface of the upper mold forming male 12 when the mold is opened.

[0077] The height of the lowest surface of the upper mold forming male 12 when the mold is opened and the height of the liquid receiving member 23 The difference is the mold opening gap size, and the height of the material is And the height of the highest point of the lower mold forming male 22 The difference is the material picking gap size. By setting the material picking gap size smaller than the mold opening gap size, it can ensure that the material picking parts can be picked up safely and efficiently without interference.

[0078] Reference Figure 4 As shown, in the hot bath stamping die for zinc-based plated door knockers of the present invention, in some embodiments, the lower die assembly 20 further includes a filler 24, and the filler 24 is arranged in the target area. The target area is an idle area in the liquid receiving part 23, that is, an area that will not interfere with the corresponding molding male, heater 282 and other components. Preferably, the filler 24 is set to high temperature and corrosion resistant steel, plastic or colloid.

[0079] By arranging the filler 24 in the target area, the amount of precooling medium required to reach the required liquid level can be effectively reduced, thus saving precooling medium. Since the amount of precooling medium required is reduced, firstly, the production cost is reduced; secondly, the time required for the preliminary preparation of the precooling medium is reduced, and the precooling medium can be heated to the preset temperature more quickly, thus effectively improving the production efficiency; finally, the thermal bath stability of the production process is improved.

[0080] Furthermore, in the hot bath stamping die for the zinc-based coated door ring of the present invention, in some embodiments, the volume of the filler 24 is Satisfies the relationship:

[0081] .

[0082] Volume of the filler 24 It should not be too small. Under the production process conditions, a filler 24 with too small a volume will easily make the volume of the precooling medium too large or larger than , thereby increasing production energy consumption. The volume of the filler 24 It should not be too large. A filling piece 24 with too large a volume may easily make the volume of the precooling medium too small or smaller than , which makes the production process conditions unstable and leads to unstable product quality. In addition, a filler 24 with an excessively large volume will require higher requirements for mold design and manufacturing, increasing production cost investment. Therefore, it is necessary to select a suitable volume of the filler 24. , in order to take into account low production energy consumption and production costs, as well as high product quality.

[0083] Considering that even if the precooling medium does not overflow during the hot bath stamping process, there is still a certain loss, the precooling medium needs to be supplemented during the actual hot bath stamping to ensure the quality of the door ring forming. In order to more efficiently supplement the precooling medium, in the hot bath stamping die suitable for the zinc-based plated door ring described in the present invention, in some embodiments, the precooling medium is continuously supplemented according to a certain amount, and the supplementation is stopped when the precooling medium is too much, and the supplementation is continued after the precooling medium is consumed.

[0084] Specifically, refer to Figure 4 , Figure 6 and Figure 7 As shown, the lower mold assembly 20 further includes a liquid level detector 251 , a first controller 311 and a liquid replenisher 252 .

[0085] The liquid level detector 251 is used to detect the real-time liquid level height of the pre-cooling medium. Those skilled in the art can set different liquid level detectors 251 according to actual needs to achieve the detection of the real-time liquid level height of the pre-cooling medium.

[0086] The first controller 311 is electrically connected to the liquid level detector 251. The first controller 311 is used to transmit a stop signal when the preset height is less than the real-time liquid level height. The stop signal includes a target duration. Preferably, the first controller 311 is disposed in an external control component 30, such as a control cabinet. Preferably, the first controller 311 controls the liquid dispenser 252 by programming PID (Proportional Integral Derivative), and a touch screen is provided to realize intelligent parameter setting and ensure the stability of the production process.

[0087] The liquid replenisher 252 is electrically connected to the first controller 311, and is used to deliver the precooling medium into the liquid receiving member 23. The liquid replenisher 252 is configured to stop delivering the precooling medium after receiving the stop signal, and the duration of stopping delivering the precooling medium is the target duration.

[0088] Preferably, at least two liquid replenishing ports are provided on the lower mold base 211, and each liquid replenishing port is provided with a water ball valve. According to the liquid replenishing port pressure and the consumption of the precooling medium, the opening of the water ball valve is controlled to achieve control of the amount of the precooling medium.

[0089] Preferably, the liquid level detector 251 is configured as a pressure sensor, and the pressure sensor is disposed at a preset height. Exemplarily, the pressure sensor is disposed on the liquid receiving member 23 .

[0090] During the hot bath stamping process, when the liquid level of the precooling medium rises to a preset height, the pressure sensor is pressurized and generates a corresponding signal, indicating that the real-time liquid level has reached the preset height. Subsequently, the first controller 311 can control the liquid replenisher 252 to stop delivering the precooling medium. After the target time has passed, the precooling medium has been consumed in a certain amount, and the liquid replenisher 252 resumes delivering the precooling medium.

[0091] Further, in the hot bath stamping die for zinc-based coated door knockers of the present invention, in some embodiments, the target time is Satisfies the relationship:

[0092] .

[0093] in, The production cycle and target duration are in seconds. It is set to be related to the production rhythm and the corresponding parameter values. It can reduce energy consumption and achieve continuous automatic water replenishment under the condition of meeting the production process of zinc-based coated door rings, greatly improving the stability of production.

[0094] Specifically, the parameter value cannot be too small. When the parameter value is too small, less than 80, the pre-cooling medium will always maintain a high liquid level during the production of zinc-based coated door knockers, and the continuous refilling time will be too long, resulting in excessive heating energy consumption of the pre-cooling medium, slow heating and low efficiency.

[0095] The parameter value cannot be too large. When the parameter value is too large and greater than 100, the pre-cooling medium will always maintain a low liquid level during the production process of the zinc-based plated door ring, resulting in insufficient pre-cooling time for the zinc-based plated door ring material before mold closing, affecting the performance of the finished product.

[0096] Those skilled in the art can set corresponding parameter values ​​according to actual needs, such as 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, etc.

[0097] Reference Figure 4 and Figure 8As shown, in the hot bath stamping die for zinc-based plated door knockers of the present invention, in some embodiments, the lower die assembly 20 further includes a material lifting member 26. The material lifting member 26 is arranged on the outer side of the lower die forming male 22, and the material lifting member 26 is used to carry the material of the target component.

[0098] Exemplarily, the lifting member 26 includes an elastic member and a supporting member. The supporting member can support the material before the forming male stamping, provide a certain support for the material, so that the material is kept at the lifting height. The elastic member is connected to the support member to provide elastic force for the support member. When the material is subjected to the force of the forming cylinder, the material exerts pressure on the support member, thereby compressing the elastic member, causing the height of the support block to drop. After forming, with the cooperation of other components, such as the ejector pin 272, the formed target component is lifted up, and at this time, the elastic member loses pressure, causing the support member to return to the lifting height. , for subsequent work.

[0099] Furthermore, in the hot bath stamping die for zinc-based coated door knockers of the present invention, in some embodiments, the lifting height of the lifting member 26 is Satisfies the relationship:

[0100] .

[0101] Specifically, the lifting height of the lifting member 26 is Should be higher than the highest point of the lower mold forming male 22 , so as to lift the material and ensure that the material does not contact the lower die forming male 22 before stamping, so as to smoothly feed the material, improve production efficiency and protect the mold.

[0102] The difference between the two heights cannot be too small. When the difference is too small, less than 1 cm, the material is easy to contact the lower mold forming male 22 in advance. The difference between the two heights cannot be too large. When the difference is too large, greater than 4 cm, although the possibility of interference is reduced, it will also lead to a decrease in the positioning accuracy of the material. In addition, if the material is set higher, the water level of the pre-cooling medium will also be affected, and there is a possibility of overflow.

[0103] The technicians in this field can set the specific lifting height according to the actual needs. The height of the highest point of the lower mold forming male 22 The difference between, for example 1cm, 1.5cm, 2cm, 2.5cm, 3cm, 3.5cm, 4cm, etc.

[0104] Furthermore, in the hot bath stamping die for zinc-based coated door knockers of the present invention, in some embodiments, the lifting height of the lifting member 26 is Satisfies the relationship:

[0105] .

[0106] By setting the lifting height and the immersion volume of the upper mold forming male 12 during molding The relationship can ensure that during the closing process of the upper mold forming male 12, the material contacts the cold medium within the set time, ensuring sufficient pre-cooling time, thereby obtaining a finished door ring with better performance.

[0107] Reference Figure 4 As shown, in the hot bath stamping die for zinc-based plated door knockers of the present invention, in some embodiments, the lower die assembly 20 further includes a movable functional part. A through hole 2121 is provided on the lower die seat 211 and the lower die pad, and the driving end of the movable functional part is movably arranged in the through hole 2121.

[0108] Exemplarily, the movable functional parts include an ejector block 271, an ejector pin 272 and a lower mold pressing block 273, which are driven by corresponding driving parts 274 to achieve corresponding functions, such as ejecting or pressing materials.

[0109] Taking the ejector pin 272 and the ejector block 271 as an example, after completing the corresponding forming process, the two forming males are separated. At this time, the target component still remains on the lower mold forming male 22. In order to facilitate blanking and improve production efficiency, the driving member 274 drives the ejector pin 272 and the ejector block 271 to move relative to the lower mold base 211 to lift the target component. Those skilled in the art can set the specific number and position of the lower mold pressing block 273, the ejector pin 272 and the ejector block 271 according to actual needs, and will not be repeated here. Correspondingly, the upper mold assembly 10 is also provided with an upper mold pressing block 14 for pressing the material.

[0110] Preferably, each driving member 274 is configured as a nitrogen spring. The nitrogen spring uses high-pressure nitrogen as a working medium to achieve driving, and has high elastic force, adjustable pressure, and stable performance.

[0111] Considering that the lower mold assembly 20 is provided with a pre-cooling medium, it is required to have a leak-proof function and has a high requirement for sealing.

[0112] Preferably, the through hole 2121 includes two openings, at least one of which is provided with a receiving groove 2122, and a sealing component 2123 is provided in the receiving groove 2122. Preferably, the sealing component 2123 is provided as an oily sealing ring, and the oily sealing ring includes but is not limited to a silicone ring, a fluororubber ring, and the like.

[0113] Reference Fig. 9 As shown, taking the ejector block 271 as an example, a receiving groove 2122 is provided on a surface of the lower mold cushion block close to the lower mold forming male 22 , and a U-shaped oily sealing ring is provided in the receiving groove 2122 .

[0114] Reference Fig.10 As shown, taking the ejector pin 272 as an example, a receiving groove 2122 is provided on a surface of the lower mold cushion block close to the lower mold forming male 22 , and a U-shaped oily sealing ring is provided in the receiving groove 2122 .

[0115] Reference Fig.11 As shown, taking the lower molded material block 273 as an example, accommodating grooves 2122 are provided on both surfaces of the lower mold pad, and U-shaped oily sealing rings are provided in the accommodating grooves 2122.

[0116] Other active functional parts of the lower mold assembly 20 also need to be sealed and leakproof accordingly. Depending on the stroke of the active functional parts, the number of sealing components 2123 is required to be different. Preferably, active functional parts with a stroke greater than 50 mm adopt a sealing structure similar to the lower mold pressing block 273, and at least two sealing components 2123 are provided. For those with a stroke less than or equal to 50 mm, the sealing structure is the same as that of the ejector pin 272, and only one sealing component 2123 is required.

[0117] Reference Figure 4 As shown, in the hot bath stamping die for zinc-based coated door rings of the present invention, in some embodiments, an anti-overflow plate 231 is provided at one end of the liquid receiving part 23 away from the lower die seat 211 .

[0118] Specifically, the anti-overflow plate 231 includes a fixed end 2311 and a free end 2312. The fixed end 2311 is fixedly connected to the liquid-receiving part 23, and the free end 2312 is arranged on the side of the liquid-receiving part 23 close to the lower mold forming male 22. The anti-overflow plate 231 is used to prevent the pre-cooling medium from overflowing the liquid-receiving part 23 during the process of the lower mold forming male 22 and the upper mold forming male 12 cooperating to form. Those skilled in the art can set the specific coverage range of the anti-overflow plate 231 according to actual needs, for example, fully setting the anti-overflow plate 231 on the liquid-receiving part 23, or only setting a part. By setting the anti-overflow plate 231, when facing the high-frequency batch production of zinc-based coated door knockers, the pre-cooling medium can be avoided during the mold closing. Preferably, the anti-overflow plate 231 is set to 6061, 7075 aluminum alloy or No. 45 steel.

[0119] Of course, a corresponding anti-overflow structure can also be provided on the upper mold assembly 10, which will not be described in detail here.

[0120] Reference Figure 4 and Figure 7 As shown, in the hot bath stamping die suitable for zinc-based coated door rings of the present invention, in some embodiments, the lower die assembly 20 further includes a temperature detector 281 , a second controller 312 and a heater 282 .

[0121] The temperature detector 281 is used to detect the real-time temperature of the pre-cooling medium. Preferably, the temperature detector 281 is installed on the inner side of the anti-overflow plate 231 or the liquid receiving member 23, and two are arranged relatively to measure and average the temperature at the same time to improve the detection accuracy. Preferably, the temperature detector 281 is set as a PT100 thermocouple.

[0122] The second controller 312 is electrically connected to the temperature detector 281. The second controller 312 is used to transmit an adjustment signal when the preset temperature is not equal to the real-time temperature. The adjustment signal includes the heating power. Preferably, the second controller 312 is arranged in an external control element 30, such as a control cabinet. Preferably, the second controller 312 controls the heater 282 by programming PID.

[0123] The heater 282 is disposed in the liquid receiving member 23, and the heater 282 is electrically connected to the second controller 312. The heater 282 is configured to heat the pre-cooling medium according to the adjustment signal.

[0124] Preferably, the heater 282 is provided with two groups and connected to an independent power supply so as to independently regulate and realize heating. Preferably, the heater 282 is connected to the outside through a socket 314 and a cable 313. Preferably, the socket 314 is set as a high-power heavy-duty connection socket 314, and the cable 313 is set as a quick-plug structure, and the power of the socket 314 is related to the heating power of the heater 282. Exemplarily, the heater 282 is set as a two-phase 380V heating rod with a power of 6KM, a total of twelve are set, and divided into two groups; the model of the cable 313 is set as 6 core 16A, 6 core 32A, 6 core 72A, etc. Preferably, the heater 282 is also provided with a sealing structure, and a waterproof protection box is set at the corresponding wiring port to achieve protection and prevent leakage and short circuit. Considering the large size of the zinc-based plated door knocker, in order to improve the heating efficiency and reduce the production cost, the heating power of the heater 282 is set to 5 to 10KW.

[0125] In the process of hot bath forming, the precooling medium is consumed and needs to be constantly replenished. The newly replenished precooling medium is usually at a lower temperature, which affects the overall temperature of the precooling medium. Therefore, the precooling medium needs to be heated. Correspondingly, if the heating time is too long, the overall temperature of the precooling medium may also exceed the preset temperature. This situation needs to be avoided.

[0126] During the forming process, the pre-cooling medium is heated by the heater 282, and the real-time temperature of the pre-cooling medium is detected by the temperature detector 281. When there is a difference between the real-time temperature and the preset temperature, the second controller 312 transmits an adjustment signal to adjust the heating power of the heater 282 to ensure that the real-time temperature is equal to the preset temperature. By setting this structure, the temperature uniformity can be well guaranteed, and high product performance can be guaranteed.

[0127] Preferably, a heat insulating component 232 is installed on both the liquid receiving part 23 and the lower mold base 211 to achieve heat insulation and heat preservation. Preferably, the heat insulating component 232 is set to be high temperature resistant plastic, and its thickness is not less than 10mm.

[0128] Reference Figure 2 and Figure 4 As shown, in the hot bath stamping die for zinc-based plated door rings of the present invention, in some embodiments, a support 291 is provided on both the upper die base 111 and the lower die base 211. Preferably, the thickness of the support 291 is not less than 10 mm.

[0129] The support platform 291 is provided with a guide member 292 and a guide stopper 293 corresponding to the guide member 292. Preferably, the guide stopper 293 is provided as a guide step. Exemplarily, four guide members 292 and four guide stoppers 293 are provided on each of the two mold bases, respectively provided at the four corners of the square, to achieve guidance.

[0130] During the process of the lower mold forming male 22 and the upper mold forming male 12 being formed in cooperation, the guide member 292 abuts against the corresponding guide stopper 293. By providing the guide member 292 and the guide stopper 293, a guide can be provided for the mold closing, thereby ensuring high quality of the finished product. Preferably, a wear-resistant component 2921 is provided on the guide member 292 to extend the service life.

[0131] On the other hand, refer to Fig.12 As shown, an embodiment of the present invention further provides a hot bath stamping method applicable to a zinc-based coated door ring, which is applied to a hot bath stamping die applicable to a zinc-based coated door ring as described in any one of the above. The hot bath stamping method applicable to a zinc-based coated door ring comprises:

[0132] First, a pre-cooling medium is provided for the lower mold assembly 20 .

[0133] The lower die assembly 20 includes a lower die seat 211, a lower die forming male 22 and a liquid receiving member 23. When in use, the lower die seat 211 can be connected to a driving device to be driven by the driving device to achieve hot bath stamping. Exemplarily, the lower die seat 211 is connected to the lower table of the press 40.

[0134] The lower mold forming male 22 and the liquid receiving member 23 are both arranged on the lower mold base 211. The liquid receiving member 23 is arranged around the outer side of the lower mold forming male 22, and the precooling medium is arranged in the liquid receiving member 23. The precooling medium is an oil-water mixture composed of a certain ratio, which is heated to a preset temperature.

[0135] Next, the material of the target component is placed on the lower die assembly 20 .

[0136] The target component material is immersed in the pre-cooling medium during the forming process, so as to be formed under the action of the pre-cooling medium and the forming cylinder. The target component material is a material that has been heated by austenitization.

[0137] Finally, the upper mold assembly 10 and the lower mold assembly 20 are controlled to close the mold, so that the upper mold forming male 12 of the upper mold assembly 10 and the lower mold forming male 22 cooperate to form the target component.

[0138] The upper die assembly 10 further includes an upper die seat 111, which is arranged opposite to the lower die seat 211. When in use, the upper die seat 111 can be connected to a driving device to be driven by the driving device to achieve hot bath stamping. Exemplarily, the driving device is set as a press 40, and the upper die seat 111 is connected to the upper table of the press 40. The upper die forming male 12 is set on the upper die seat 111, and a cooling channel 121 is arranged in the upper die forming male 12. The cooling channel 121 is configured to reduce the temperature of the upper die forming male 12 in a preset time period.

[0139] Specifically, during the hot bath stamping process, the upper die forming male 12 can provide die cooling for the material of the target component. However, the temperature of the target component material is high, and during the hot bath stamping process, the target component material deforms and generates heat, causing the temperature of the forming male to rise, and the die cooling effect is limited. By providing a cooling channel 121 in the upper die forming male 12, a cooling medium, such as a coolant, can be provided in the cooling channel 121 to achieve cooling of the upper die forming male 12 so that it maintains a uniform and stable temperature. On this basis, the target component material has a sufficient cooling rate, the production efficiency is improved, and the product performance and size can meet the requirements. In addition, the wall mold can be prevented from being damaged by overheating, thereby extending the service life of the mold.

[0140] The hot bath stamping method suitable for zinc-based coated door rings described in the present invention provides two-stage cooling for the forming of zinc-based coated door rings by setting a cooling channel 121 in the upper mold forming male 12 and setting a liquid receiving part 23 outside the lower mold forming male 22 to set a pre-cooling medium, thereby better realizing the "short-term heating, pre-cooling forming" process of zinc-based coated door rings, and effectively avoiding the LIME phenomenon of zinc-based coated steel materials. The overall production efficiency is high, the cost is low, and the quality of the finished product is good, and zinc-based coated door ring products with performance and size that meet the requirements can be produced. It can effectively increase the application ratio of zinc-based coated steel on automobile bodies, realize the mass production of welded integrated zinc-based coated door rings, and help the industry reduce costs and increase efficiency.

[0141] Working principle:

[0142] First, a pre-cooling medium is placed in the liquid receiving member 23 and heated by the heater 282 so that the temperature of the pre-cooling medium reaches a preset temperature.

[0143] Subsequently, the austenitized and heated zinc-based coated door ring material is placed on the material lifting member 26 of the lower die assembly 20, and the material is immersed in the pre-cooling medium to achieve pre-cooling.

[0144] Next, the press machine 40 is controlled to move the upper mold assembly 10 and the lower mold assembly 20 relatively close to each other to achieve mold closing. The zinc-based plated door ring is formed under the cooperation of the pre-cooling medium, the upper mold forming male 12 and the lower mold forming male 22. During the hot bath stamping forming process, the zinc-based plated door ring material remains immersed in the pre-cooling medium. At the same time, the cooling medium is introduced into the cooling channel 121 during a preset time period to achieve temperature reduction.

[0145] During the forming process, the precooling medium is heated by the heater 282, and the real-time temperature of the precooling medium is detected by the temperature detector 281. When there is a difference between the real-time temperature and the preset temperature, the second controller 312 transmits a regulation signal to adjust the heating power of the heater 282 to ensure that the real-time temperature is equal to the preset temperature.

[0146] Finally, after a certain period of pressure maintenance, the upper mold assembly 10 and the lower mold assembly 20 are separated, and the ejector pin 272 and the ejector block 271 cooperate with the robot arm to unload the material, and then reload the material to achieve quantitative production.

[0147] During the production process, the precooling medium is consumed, and the precooling medium is delivered and replenished through the liquid replenisher 252. When the precooling medium is excessive and its liquid level rises to a preset height, the pressure sensor is pressurized and generates a corresponding signal, so that the first controller 311 controls the liquid replenisher 252 to stop delivering the precooling medium. After the target time has passed, the precooling medium has been consumed by a certain amount, and the liquid replenisher 252 resumes delivering the precooling medium.

[0148] The hot bath stamping die and hot bath stamping method suitable for zinc-based coated door rings described in the present invention provide two-stage cooling for the forming of zinc-based coated door rings by setting a cooling channel 121 in the upper mold forming male 12 and setting a liquid receiving part 23 outside the lower mold forming male 22 to set a pre-cooling medium, which better realizes the process of "short-term heating and pre-cooling forming" of zinc-based coated door rings and effectively avoids the LIME phenomenon of zinc-based coated steel materials. In addition, through the design of the height of the liquid receiving part 23, the filling part 24, the pre-cooling medium, the height of the lifting part 26, the sealing structure, etc., the welding process, the spot welding patch process and the different area material thickness forming process are realized. The application of the zinc-based coated door ring forming process can effectively increase the application ratio of zinc-based coated steel on the car body, realize the mass production of welded integrated zinc-based coated door rings, and help the industry reduce costs and increase efficiency.

[0149] It should be noted that the term "including" and its variations used in the embodiments of the present invention are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "multiple" mentioned in the embodiments of the present invention are illustrative and not restrictive. Those skilled in the art should understand that unless the context clearly indicates otherwise, it should be understood as "one or more".

[0150] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the embodiments of the present invention are all information and data authorized by the user or fully authorized by all parties, and corresponding operation entrances are provided for the user to choose to authorize or refuse.

[0151] The various steps described in the method implementation methods provided by the embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method implementation methods may include additional steps and / or omit the steps shown. The scope of protection of the present invention is not limited in this respect.

[0152] The term "embodiment" in this specification refers to specific features, structures or characteristics described in conjunction with the embodiment that can be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. The various embodiments in this specification are described in a related manner, and the same or similar parts between the various embodiments refer to each other. In particular, for the device, equipment, and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts refer to the partial description of the method embodiment.

[0153] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A hot bath stamping die suitable for zinc-based coated door knockers, characterized in that: include: An upper die assembly, the upper die assembly comprising an upper die seat and an upper die forming male; The upper die forming male is arranged on the upper die seat, a cooling channel is arranged in the upper die forming male, and the cooling channel is configured to reduce the temperature of the upper die forming male in a preset time period; and, A lower die assembly, the lower die assembly comprising a lower die seat, a lower die forming male and a liquid receiving part; the lower die seat is arranged opposite to the upper die seat; the lower die forming male and the liquid receiving part are both arranged on the lower die seat, the lower die forming male is used to cooperate with the upper die forming male to form a target component; the liquid receiving part is arranged around the outer side of the lower die forming male, and the material of the target component is immersed in the pre-cooling medium of the liquid receiving part during the forming process.

2. The hot bath stamping die suitable for zinc-based coated door knockers according to claim 1, characterized in that: The height of the liquid receiving member Satisfies the relationship: ， in, is the mold closing liquid level height, which is the liquid level height of the pre-cooling medium when the upper mold forming male and the lower mold forming male are molded together. The mold closing liquid level height is equal to the length of the liquid receiving part. , the width of the liquid receiving member , the immersion volume of the upper mold forming rod during forming And the height of the highest point of the lower mold forming Related.

3. The hot bath stamping die suitable for zinc-based coated door knockers according to claim 1 or 2, characterized in that: The lower mold assembly also includes: A filling piece, the filling piece is arranged in the target area; wherein the target area is an idle area in the liquid receiving part, and the volume of the filling piece is Satisfies the relationship: 。 4. The hot bath stamping die suitable for zinc-based coated door knockers according to claim 1, characterized in that: The lower mold assembly also includes: A liquid level detector, the liquid level detector is used to detect the real-time liquid level height of the pre-cooling medium; A first controller, the first controller is electrically connected to the liquid level detector, and the first controller is used to send a stop signal when a preset height is less than the real-time liquid level height; wherein the stop signal includes a target duration, and the target duration Satisfies the relationship, , is the production cycle in seconds; and A fluid replenisher, the fluid replenisher is electrically connected to the first controller, and the fluid replenisher is used to transport the pre-cooling medium into the liquid receiving member; wherein the fluid replenisher is configured to stop transporting the pre-cooling medium after receiving the stop signal, and the duration of stopping the transport of the pre-cooling medium is the target duration.

5. The hot bath stamping die suitable for zinc-based coated door knockers according to claim 1, characterized in that: The lower mold assembly also includes: A lifting piece, the lifting piece is arranged on the outer side of the lower mold forming male, and the lifting piece is used to carry the material of the target component; wherein the lifting height of the lifting piece is Satisfies the relationship: ， 。 6. The hot bath stamping die for zinc-based coated door knockers according to claim 1, characterized in that: The lower mold assembly also includes: A movable functional part, wherein a through hole is provided on the lower die base, and the driving end of the movable functional part is movably arranged in the through hole; wherein the through hole includes two orifices, at least one of the orifices is provided with a receiving groove, and a sealing component is provided in the receiving groove.

7. The hot bath stamping die for zinc-based coated door knockers according to claim 1, characterized in that: An anti-overflow plate is provided at one end of the liquid-receiving part away from the lower mold base, and the anti-overflow plate includes a fixed end and a free end, the fixed end is fixedly connected to the liquid-receiving part, and the free end is provided on a side of the liquid-receiving part close to the lower mold forming male, and the anti-overflow plate is used to prevent the pre-cooling medium from overflowing the liquid-receiving part during the process of the lower mold forming male and the upper mold forming male cooperating to form.

8. The hot bath stamping die for zinc-based coated door knockers according to claim 1, characterized in that: The lower mold assembly also includes: A temperature detector, the temperature detector is used to detect the real-time temperature of the precooling medium; a second controller, the second controller being electrically connected to the temperature detector, and the second controller being used for transmitting an adjustment signal when the preset temperature is not equal to the real-time temperature; wherein the adjustment signal includes heating power; and A heater is disposed in the liquid receiving member, the heater is electrically connected to the second controller, and the heater is configured to heat the precooling medium according to the adjustment signal.

9. The hot bath stamping die for zinc-based coated door knockers according to claim 1, characterized in that: The upper die seat and the lower die seat are both provided with a support platform, and the support platform is provided with a guide member and a guide limit portion corresponding to the guide member; wherein, during the process of the lower die forming pin and the upper die forming pin cooperating to form, the guide member abuts against the corresponding guide limit portion.

10. A hot bath stamping method for zinc-based coated door knockers, applied to the hot bath stamping die for zinc-based coated door knockers as claimed in any one of claims 1 to 9, characterized in that: include: A pre-cooling medium is provided for the lower mold assembly; wherein the lower mold assembly comprises a lower mold base, a lower mold forming male and a liquid receiving member, the lower mold forming male and the liquid receiving member are both provided on the lower mold base, the liquid receiving member is provided around the outer side of the lower mold forming male, and the pre-cooling medium is provided in the liquid receiving member; The target component material is arranged on the lower mold assembly; wherein the target component material is immersed in the pre-cooling medium during the forming process; Control the upper mold assembly and the lower mold assembly to close the mold so that the upper mold forming pin of the upper mold assembly cooperates with the lower mold forming pin to form the target component; wherein, the upper mold assembly also includes an upper mold base, the upper mold base is arranged opposite to the lower mold base, the upper mold forming pin is arranged on the upper mold base, and a cooling channel is arranged in the upper mold forming pin, and the cooling channel is configured to reduce the temperature of the upper mold forming pin within a preset time period.

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