Light-weight B column partition heating forming device and thermal forming process thereof

Abstract

The invention relates to the technical field of B column production, and discloses a lightweight B column partition heating forming device and a thermal forming process thereof, the lightweight B column partition heating forming device comprises a machine base, a machine frame arranged on the machine base, a stamping assembly arranged on the machine base and the machine frame, and an ejection mechanism arranged in the stamping assembly; the stamping assembly comprises an upper die base and a lower die base, a die cavity is formed in the upper side of the lower die base, and a partition heating part for conducting partition heating on the B column is arranged in the lower die base. According to the lightweight B column partition heating forming device, a heater in the heating system controls a plurality of heating plates to conduct partition heating on different areas of a B column product, cooling water in the upper die base continuously flows in combination with the cooling system, differential cooling is achieved, and through the partition heating and differential cooling mode, the weight of the B column product is greatly reduced. The performance of each region of a B column product can be effectively guaranteed, unnecessary material use is reduced, the lightweight design of the B column is achieved, the overall weight of an automobile is reduced, and the development trend of lightweight of the automobile is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of B-pillar production, and in particular relates to a lightweight B-pillar partitioned heating and forming device and a thermoforming process thereof. Background Art

[0002] In the automotive manufacturing industry, the B-pillar, as a key component of the vehicle body structure, bears the important responsibility of ensuring vehicle collision safety and body structural stability. As the automotive industry's requirements for lightweighting, energy conservation and emission reduction, and safety performance continue to increase, more stringent standards have been placed on the performance and manufacturing process of the B-pillar. Traditional B-pillar manufacturing processes often find it difficult to ensure that the B-pillar has sufficient strength and toughness while meeting lightweighting requirements. Heat forming technology, as an advanced manufacturing process, can effectively solve this problem. By heating the B-pillar raw materials to a specific temperature range and stamping them at high temperature, the plasticity of the material can be significantly improved, allowing the B-pillar to better fit the mold shape during the forming process, reducing the occurrence of forming defects and meeting the requirements of the vehicle's collision safety performance. Therefore, heat forming of the B-pillar has become an important technical means to improve B-pillar performance and achieve lightweighting in the automotive manufacturing industry.

[0003] At present, the existing thermoforming devices have the following problems and shortcomings in the process of realizing the heat forming of the B-pillar. First, in the process of stamping the B-pillar, due to the differences in shape, thickness and performance requirements of different areas of the B-pillar, the mold needs to have different temperatures in the corresponding areas of the B-pillar to achieve the best forming effect. However, the existing thermoforming devices have obvious limitations in temperature control. It is difficult to accurately and flexibly control the temperature of different positions of the B-pillar, which in turn affects the forming quality of the B-pillar and causes defects such as rebound and cracking. It is unable to meet the specific requirements of different areas of the B-pillar for forming performance; secondly, after the stamping die completes the stamping, the upper and lower dies are separated from each other, and the molded B-pillar in the die cavity needs to be produced. When the B-pillar product area in the mold cavity is large, a large gripping force will be generated between the B-pillar product and the side wall of the mold cavity. When the existing ejection mechanism ejects the B-pillar product, it is difficult to accurately control the ejection force. Excessive ejection force can easily damage the B-pillar product, resulting in scratches, dents and other damage on the surface of the B-pillar. At the same time, severe ejection force can easily cause deformation of the B-pillar product, such as bending and twisting, making the dimensional accuracy and shape accuracy of the B-pillar product unable to meet the design requirements, thereby significantly increasing the defective rate of the B-pillar product, which not only increases production costs, but also affects the production efficiency and product quality of automobile manufacturing. Therefore, there are deficiencies and it cannot meet the production and use needs of manufacturers. Therefore, it is necessary to further improve it.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a lightweight B-pillar partition heating and forming device and its hot forming process are provided, in order to achieve a more practical purpose. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a lightweight B-pillar partitioned heating and forming device and a thermoforming process thereof, which are achieved by the following specific technical means:

[0006] A lightweight B-pillar zoned heating and forming device includes a machine base, a frame arranged on the machine base, a stamping assembly arranged on the machine base and the frame, and a material ejecting mechanism arranged in the stamping assembly;

[0007] The stamping assembly includes an upper die base and a lower die base, and a die cavity is opened on the upper side of the lower die base. The lower die base is provided with a zoned heating component for zoned heating of the B-pillar, and the upper die base is provided with a cooling component for cooling the B-pillar after heating;

[0008] A positioning column is fixedly installed on the bottom of the upper die base, and a positioning groove matching the positioning column is opened on the lower die base;

[0009] The ejection mechanism includes an ejection plate arranged in the lower mold base, a support assembly is arranged in the positioning groove, the bottom of the support assembly is fixedly connected to the ejection plate, and several ejection assemblies for forming B-pillar unloading are symmetrically arranged on the upper side of the ejection plate.

[0010] As a further description of the above technical solution: the heater in the heating system controls multiple heating plates to perform zoned heating on different areas of the B-pillar product, and the cooling system is combined to continuously flow cooling water in the upper mold base to achieve differentiated cooling. As the temperature of the B-pillar product drops, the internal austenite structure is transformed into a martensite structure. The martensite content and organizational morphology obtained in different areas are different, forming a gradient of material properties. The high-strength area obtains more martensite, with higher strength and hardness. The medium-strength area has relatively less martensite and has a certain toughness. Through this zoned heating and differentiated cooling method, the performance of each area of ​​the B-pillar product can be effectively guaranteed, unnecessary material use can be reduced, the lightweight design of the B-pillar can be achieved, and the overall weight of the car can be reduced, which is in line with the development trend of lightweight cars.

[0011] Furthermore, a guide column is fixedly installed on the bottom of the upper die base, and a guide groove matching the guide column is opened on the lower die base.

[0012] As a further description of the above technical solution: by continuously moving the upper mold base downward, the guide column is inserted into the guide groove to achieve precise positioning and contact between the upper mold base and the lower mold base, thereby completing the mold closing action.

[0013] Furthermore, the frame is provided with a driving assembly for driving the upper die base to rise and fall, and the driving assembly includes a hydraulic cylinder fixedly assembled on the frame, and the bottom of the hydraulic cylinder is fixedly connected to the upper die base by a piston rod;

[0014] A guide sleeve is also fixedly mounted on the frame, a guide rod is slidably mounted on the inner side of the guide sleeve, and the lower end of the guide rod is fixedly connected to the upper die base.

[0015] As a further description of the above technical solution: by starting the hydraulic cylinder, the piston rod of the hydraulic cylinder pushes the upper die base to move downward. During the downward movement of the upper die base, the guide rod is driven to move downward synchronously. The guide rod slides in the guide sleeve. The cooperation between the guide rod and the guide sleeve ensures the stability of the downward movement of the upper die base.

[0016] Furthermore, the machine base is provided with a transfer assembly for driving the lower mold base to move forward and backward, and the transfer assembly includes a transfer plate fixedly assembled on the rear side of the machine base, a transfer frame fixedly mounted on the bottom of the transfer plate, a drive motor fixedly mounted on one side of the transfer frame, an output end of the drive motor is fixedly connected to a threaded screw, a transfer block is movably mounted on the threaded screw, and the upper side of the transfer block is fixedly connected to the lower mold base;

[0017] A guide rail is fixedly mounted on the upper side of the machine base, and a guide slider is slidably mounted on the guide rail. The upper side of the guide slider is fixedly connected to the lower die base.

[0018] As a further description of the above technical solution: when the lower die base moves, the guide slider is driven to slide on the guide rail. The cooperation between the guide rail and the guide slider provides a stable guide for the movement of the lower die base, ensuring that the lower die base can move smoothly and accurately.

[0019] Furthermore, the zoned heating component includes a mounting frame fixedly assembled in the lower mold base, a heater is fixedly mounted on the mounting frame, and a plurality of heating plates for zoned heating of the B-pillar product are provided on the upper side of the heater;

[0020] Wherein, a heat conduction plate is fixedly installed in the lower mold base, and the upper side of the heating plate is in contact with the heat conduction plate.

[0021] As a further description of the above technical solution: through precise control of the heater, multiple heating plates generate different amounts of heat, so that different areas of the B-pillar product can be heated in different zones.

[0022] Furthermore, an inner cavity is opened inside the upper mold base, and cooling water is arranged in the inner cavity. The cooling component includes a cooling pump fixedly assembled on the left side of the upper mold base, and a cooling pipe is fixedly connected to one side of the cooling pump. The end of the cooling pipe away from the cooling pump is fixedly connected to the right side of the upper mold base.

[0023] As a further description of the above technical solution: by extracting the cooling water in the cavity of the upper mold base through a cooling pump, the cooling water in the cavity of the upper mold base can be continuously circulated, thereby accelerating the cooling effect of the B-pillar product in the cavity.

[0024] Furthermore, the support assembly includes a support link movably installed in the positioning groove, the upper end of the support link is fixedly installed with a limit plate, the lower end of the support link is fixedly connected to the ejection plate, and the outer periphery of the support link is provided with a support spring.

[0025] As a further description of the above technical solution: through this setting, the ejector plate can be driven to drive the unloading ejector rod to independently demold the formed B-pillar product.

[0026] Furthermore, the ejector assembly includes a fixed sleeve rod fixedly assembled in the lower die base, a discharge ejector rod is slidably mounted on the inner side of the fixed sleeve rod, and a plurality of speed reduction grooves are opened on the outer periphery of the discharge ejector rod;

[0027] An elastic telescopic member is fixedly mounted on the inner wall of the fixed sleeve rod, and a knocking member is fixedly connected to one end of the elastic telescopic member facing the unloading ejector rod.

[0028] As a further description of the above technical solution: This setting effectively reduces the upward moving speed and ejection force of the unloading ejector rod, making the ejection process softer and reducing damage to the surface of the B-pillar product. In addition, by reducing the ejection force and upward moving speed of the unloading ejector rod, the B-pillar product can be subjected to more uniform force during the ejection process, reducing deformation caused by uneven force.

[0029] Furthermore, a control panel is fixedly mounted on the front side of the base.

[0030] As a further description of the above technical solution: the setting of the control panel is conducive to the control of the device, further improving its applicability.

[0031] A lightweight B-pillar partition heating and forming process includes the following steps:

[0032] S1: First, the pre-heated sheet material is accurately placed on the lower die base;

[0033] S2: By starting the drive motor, the transfer block and the lower die base are driven to move forward. As the drive motor continues to drive, the lower die base and the sheet material on it gradually move to just below the upper die base. At this time, the drive motor stops running.

[0034] S3: Start the hydraulic cylinder. The piston rod of the hydraulic cylinder pushes the upper die base downward. The guide column and positioning column on the upper die base are inserted into the guide groove and positioning groove on the lower die base respectively, so that the upper die base and the lower die base are accurately positioned and contacted, thereby completing the mold closing action.

[0035] S4: After the mold is closed, the upper mold base and the lower mold base apply pressure to the sheet material to complete the stamping operation, so that the sheet material is formed into a B-pillar product. The stamped B-pillar product is located in the mold cavity of the lower mold base;

[0036] S5: Start the heating system, use the heater to generate kinetic energy and start working. Through the precise control of the heater, multiple heating plates generate different amounts of heat, so that different areas of the B-pillar product can be heated in different areas;

[0037] S6: Start the cooling system. The cooling pump extracts cooling water from the cavity in the upper die base, so that the cooling water in the cavity in the upper die base continuously circulates, thereby accelerating the cooling of the B-pillar product in the cavity.

[0038] S7: Finally, the B-pillar product formed in the cavity of the lower die base is pushed out of the mold by the unloading ejector rod, thereby realizing the autonomous demoulding of the B-pillar product and continuing the next cycle.

[0039] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0040] 1. This lightweight B-pillar zoned heating and forming device controls multiple heating plates through the heater in the heating system to heat different areas of the B-pillar product in different zones, and combines with the cooling system to continuously flow cooling water in the upper mold base to achieve differentiated cooling. As the temperature of the B-pillar product drops, the internal austenite structure transforms into martensite structure. The martensite content and organizational morphology obtained in different areas are different, forming a gradient of material properties. The high-strength area obtains more martensite, with higher strength and hardness, while the medium-strength area has relatively less martensite and has a certain toughness. Through this zoned heating and differentiated cooling method, the performance of each area of ​​the B-pillar product can be effectively guaranteed, unnecessary material use can be reduced, the lightweight design of the B-pillar can be achieved, the overall weight of the vehicle can be reduced, and it helps to improve the vehicle's fuel economy and cruising range, which is in line with the development trend of lightweight vehicles.

[0041] 2. This lightweight B-pillar zoned heating and forming device can effectively reduce the upward speed and ejection force of the unloading ejector rod by causing the deceleration groove on the unloading ejector rod to contact the striking piece during the upward movement of the unloading ejector rod, and the elastic telescopic piece to push the striking piece to contact the deceleration groove, making the ejection process softer. This design greatly reduces damage to the surface of the B-pillar product, avoids defects such as scratches and dents on the product surface caused by excessive ejection force or excessive speed, and improves the appearance quality of the product. At the same time, reducing the ejection force and upward movement speed of the unloading ejector rod can make the B-pillar product more evenly stressed during the ejection process, reduce deformation caused by uneven force, ensure the dimensional accuracy and shape stability of the product, and improve the product qualification rate.

[0042] 3. This lightweight B-pillar zoned heating and forming device uses an elastic telescopic part to push the knocking part into contact with the deceleration groove. The knocking part knocks the discharge ejector rod to induce resonance, which can quickly destroy the adsorption state between the B-pillar product and the side wall of the lower mold base cavity. By converting static friction into dynamic friction, the friction resistance during the ejection process is significantly reduced, and the initial force required by the discharge ejector rod to eject the B-pillar product is greatly reduced, making the ejection process easier and smoother. This design not only shortens the ejection time and improves production efficiency, but also reduces the risk of damage to the product due to long-term ejection. At the same time, it improves the ejection quality and integrity of the product, ensures that the B-pillar product can be ejected from the cavity in good condition, reduces the workload of subsequent processing and repair, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 It shows a schematic diagram of the overall three-dimensional structure provided by an embodiment of the present invention;

[0045] Figure 2 A schematic diagram of the installation structure of the transfer assembly and the lower mold base provided in an embodiment of the present invention is shown;

[0046] Figure 3 It shows the installation structure diagram of the machine base and the transfer assembly provided in an embodiment of the present invention;

[0047] Figure 4 It shows a schematic structural diagram of a transfer assembly provided according to an embodiment of the present invention;

[0048] Figure 5A schematic diagram of the installation structure of a rack and a drive assembly according to an embodiment of the present invention is shown;

[0049] Figure 6 A schematic structural diagram of an upper die base and a lower die base according to an embodiment of the present invention is shown;

[0050] Figure 7 A schematic diagram of the installation structure of the upper mold base and the cooling component provided in an embodiment of the present invention is shown;

[0051] Figure 8 The schematic diagram of the local structure of the lower die base provided by the embodiment of the present invention is shown. Figure 1 ;

[0052] Figure 9 The schematic diagram of the local structure of the lower die base provided by the embodiment of the present invention is shown. Figure 2 ;

[0053] Figure 10 A schematic diagram of the installation structure of the lower mold base and the zoned heating component provided in accordance with an embodiment of the present invention is shown;

[0054] Figure 11 The embodiment of the present invention provides Figure 8 A magnified schematic diagram of part A;

[0055] Figure 12 The embodiment of the present invention provides Figure 8 Enlarged schematic diagram of part B.

[0056] Description of reference numerals:

[0057] 10. Machine base; 11. Machine frame; 12. Control panel;

[0058] 20. Stamping assembly; 21. Upper die base; 211. Guide column; 212. Positioning column; 22. Lower die base; 221. Guide groove; 222. Positioning groove; 223. Heat conduction plate;

[0059] 30. Drive assembly; 31. Hydraulic cylinder; 32. Piston rod; 33. Guide sleeve; 34. Guide rod;

[0060] 40. Transfer assembly; 41. Transfer plate; 42. Transfer rack; 43. Drive motor; 44. Screw rod; 45. Transfer block; 46. Guide rail; 47. Guide slider;

[0061] 50. Cooling component; 51. Cooling pump; 52. Cooling pipe;

[0062] 60. Zone heating component; 61. Mounting frame; 62. Heater; 63. Heating plate;

[0063] 70. Ejecting mechanism; 71. Ejecting plate; 72. Support assembly; 721. Support connecting rod; 722. Limiting plate; 723. Support spring; 73. Ejecting assembly; 731. Fixed sleeve rod; 732. Unloading ejector rod; 7321. Speed ​​reduction groove; 733. Elastic expansion member; 734. Knocking member. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0065] See also Figures 1 to 12 A lightweight B-pillar zoned heating and forming device includes a machine base 10, a frame 11 arranged on the machine base 10, a stamping assembly 20 arranged on the machine base 10 and the frame 11, and a material ejection mechanism 70 arranged in the stamping assembly 20; the stamping assembly 20 includes an upper die base 21 and a lower die base 22, and a die cavity is opened on the upper side of the lower die base 22, and a zoned heating component 60 for zoned heating of the B-pillar is provided in the lower die base 22, and a zoned heating component 60 for zoned heating of the B-pillar is provided on the upper die base 21. A cooling component 50 for cooling after heating; a positioning column 212 is fixedly installed on the bottom of the upper mold base 21, and a positioning groove 222 matching the positioning column 212 is provided on the lower mold base 22; the ejection mechanism 70 includes an ejection plate 71 arranged in the lower mold base 22, and a support component 72 is provided in the positioning groove 222, and the bottom of the support component 72 is fixedly connected to the ejection plate 71, and a plurality of ejection components 73 for forming B-pillar unloading are symmetrically provided on the upper side of the ejection plate 71.

[0066] The heater 62 in the heating system controls multiple heating plates 63 to perform zoned heating on different areas of the B-pillar product, and the cooling system is combined to keep the cooling water flowing in the upper mold base 21 to achieve differentiated cooling. As the temperature of the B-pillar product drops, the internal austenite structure is transformed into a martensite structure. The martensite content and organizational morphology obtained in different areas are different, forming a gradient of material properties. The high-strength area obtains more martensite, with higher strength and hardness, and the medium-strength area has relatively less martensite and has a certain toughness. Through this zoned heating and differentiated cooling method, the performance of each area of ​​the B-pillar product can be effectively guaranteed, unnecessary material use can be reduced, the lightweight design of the B-pillar can be achieved, and the overall weight of the car can be reduced, which is in line with the development trend of lightweight cars.

[0067] See also Figures 1 to 3 A control panel 12 is fixedly mounted on the front side of the base 10 ; the arrangement of the control panel facilitates the control of the device.

[0068] See also Figures 2 to 4 The machine base 10 is provided with a transfer assembly 40 for driving the lower die base 22 to move forward and backward. The transfer assembly 40 includes a transfer plate 41 fixedly assembled on the rear side of the machine base 10. A transfer frame 42 is fixedly installed on the bottom of the transfer plate 41. A drive motor 43 is fixedly installed on one side of the transfer frame 42. The output end of the drive motor 43 is fixedly connected to a threaded screw 44. A transfer block 45 is movably installed on the threaded screw 44. The upper side of the transfer block 45 is fixedly connected to the lower die base 22. A guide rail 46 is also fixedly installed on the upper side of the machine base 10, and a guide slider 47 is slidably installed on the guide rail 46. The guide slider 4 The upper side of 7 is fixedly connected to the lower die base 22; by starting the drive motor 43, after the drive motor 43 is running, its output end drives the threaded screw 44 to start rotating, and the threaded screw 44 drives the transfer block 45 to move forward during the rotation. Since the transfer block 45 is fixedly connected to the lower die base 22, the transfer block 45 will synchronously drive the lower die base 22 to move when it moves. At the same time, when the lower die base 22 moves, it drives the guide slider 47 to slide on the guide slide rail 46. The cooperation of the guide slide rail 46 and the guide slider 47 provides a stable guide for the movement of the lower die base 22, ensuring that the lower die base 22 can move smoothly and accurately.

[0069] See also Figure 1 、 Figure 5 The frame 11 is provided with a driving assembly 30 for driving the upper die base 21 to move up and down. The driving assembly 30 includes a hydraulic cylinder 31 fixedly assembled on the frame 11. The bottom of the hydraulic cylinder 31 is fixedly connected to the upper die base 21 by a piston rod 32; a guide sleeve 33 is also fixedly mounted on the frame 11, and a guide rod 34 is slidably mounted on the inner side of the guide sleeve 33, and the lower end of the guide rod 34 is fixedly connected to the upper die base 21; by starting the hydraulic cylinder 31, the piston rod 32 of the hydraulic cylinder 31 pushes the upper die base 21 to move downward. During the downward movement of the upper die base 21, the guide rod 34 is driven to move downward synchronously, and the guide rod 34 slides in the guide sleeve 33. The cooperation between the guide rod 34 and the guide sleeve 33 ensures the stability of the downward movement of the upper die base 21.

[0070] See also Figures 6 to 8 A guide column 211 is fixedly installed at the bottom of the upper mold base 21, and a guide groove 221 matching the guide column 211 is opened on the lower mold base 22; as the upper mold base 21 continuously moves downward, the guide column 211 is inserted into the guide groove 221, thereby realizing precise positioning and contact between the upper mold base 21 and the lower mold base 22, thereby completing the mold closing action.

[0071] See also Figures 8 to 10The zoned heating component 60 includes a mounting frame 61 fixedly assembled in the lower mold base 22, on which a heater 62 is fixedly mounted. A plurality of heating plates 63 for zoned heating of the B-pillar product are arranged on the upper side of the heater 62; wherein a heat conduction plate 223 is fixedly mounted in the lower mold base 22, and the upper side of the heating plate 63 is in contact with the heat conduction plate 223; kinetic energy is generated by the heater 62 and the work starts. Since a plurality of heating plates 63 are arranged above the heater 62, the plurality of heating plates 63 generate different amounts of heat through precise control of the heater 62, thereby enabling zoned heating of different areas of the B-pillar product.

[0072] See also Figures 6 and 7 An inner cavity is provided inside the upper mold base 21, and cooling water is provided in the inner cavity. The cooling component 50 includes a cooling pump 51 fixedly assembled on the left side of the upper mold base 21, and a cooling pipe 52 is fixedly connected to one side of the cooling pump 51. The end of the cooling pipe 52 away from the cooling pump 51 is fixedly connected to the right side of the upper mold base 21; the cooling water in the inner cavity of the upper mold base 21 is extracted by the cooling pump 51, and the cooling water is transported by the cooling pump 51 and flows through the cooling pipe 52 in the external environment. The cold air in the external environment cools the cooling water in the cooling pipe 52, and the cooled cooling water is transported back to the inner cavity of the upper mold base 21 through the other end of the cooling pipe 52, so that the cooling water in the inner cavity of the upper mold base 21 circulates continuously, thereby accelerating the cooling effect of the B-pillar product in the cavity.

[0073] See also Figures 8 to 11 The support assembly 72 includes a support link 721 movably installed in the positioning groove 222, a limit plate 722 is fixedly installed on the upper end of the support link 721, and the lower end of the support link 721 is fixedly connected to the ejection plate 71. A support spring 723 is sleeved on the outer periphery of the support link 721; through this arrangement, the ejection plate 71 can be driven to drive the unloading ejector rod 732 to perform autonomous demolding of the formed B-pillar product.

[0074] See also Figures 8 to 12The ejector assembly 73 includes a fixed sleeve rod 731 fixedly assembled in the lower die base 22, a discharge ejector rod 732 is slidably installed on the inner side of the fixed sleeve rod 731, and a plurality of speed reduction grooves 7321 are opened on the outer periphery of the discharge ejector rod 732; an elastic telescopic member 733 is fixedly installed on the inner wall of the fixed sleeve rod 731, and a knocking member 734 is fixedly connected to one end of the elastic telescopic member 733 facing the discharge ejector rod 732; during the upward movement of the discharge ejector rod 732, the discharge ejector rod 732 The speed reduction groove 7321 on the upper part will come into contact with the knocking piece 734, and the elastic telescopic piece 733 pushes the knocking piece 734 to contact with the speed reduction groove 7321, effectively reducing the upward moving speed and ejection force of the unloading ejector rod 732, making the ejection process softer and reducing damage to the surface of the B-pillar product. In addition, by reducing the ejection force and upward moving speed of the unloading ejector rod 732, the B-pillar product can be subjected to more uniform force during the ejection process, reducing deformation caused by uneven force.

[0075] A lightweight B-pillar partition heating and forming process includes the following steps:

[0076] S1: First, the preheated sheet material is accurately placed on the lower die base 22;

[0077] S2: By starting the drive motor 43, the transfer block 45 and the lower die base 22 move forward. As the drive motor 43 continues to drive, the lower die base 22 and the sheet material thereon gradually move to just below the upper die base 21. At this time, the drive motor 43 stops running.

[0078] S3: The hydraulic cylinder 31 is started, and the piston rod 32 of the hydraulic cylinder 31 pushes the upper die base 21 downward. The guide column 211 and the positioning column 212 on the upper die base 21 are inserted into the guide groove 221 and the positioning groove 222 on the lower die base 22 respectively, so that the upper die base 21 and the lower die base 22 are accurately positioned and contacted, thereby completing the mold closing action;

[0079] S4: After the mold is closed, the upper mold base 21 and the lower mold base 22 apply pressure to the sheet material to complete the stamping operation, so that the sheet material is formed into a B-pillar product. The stamped B-pillar product is located in the mold cavity of the lower mold base 22;

[0080] S5: Start the heating system, use the heater 62 to generate kinetic energy and start working. Through the precise control of the heater 62, the multiple heating plates 63 generate different amounts of heat, so that different areas of the B-pillar product can be heated in different areas;

[0081] S6: The cooling system is started, and the cooling pump 51 extracts cooling water from the cavity in the upper mold base 21, so that the cooling water in the cavity in the upper mold base 21 continuously circulates, thereby accelerating the cooling of the B-pillar product in the cavity;

[0082] S7: Finally, the B-pillar product formed in the mold cavity of the lower mold base 22 is pushed by the unloading push rod 732 to perform demolding operation, thereby realizing the autonomous demolding of the B-pillar product and continuing the next cycle.

[0083] The specific usage and function of this embodiment are as follows:

[0084] Working principle: First, the preheated sheet material is accurately placed on the lower die base 22. The operator starts the drive motor 43 by operating the control panel 12. After the drive motor 43 is running, its output end drives the screw rod 44 to start rotating. During the rotation, the screw rod 44 drives the transfer block 45 to move forward. Since the transfer block 45 is fixedly connected to the lower die base 22, the transfer block 45 will synchronously drive the lower die base 22 to move when it moves. At the same time, when the lower die base 22 moves, it drives the guide slider 47 to slide on the guide rail 46. The cooperation between the guide rail 46 and the guide slider 47 provides a stable guide for the movement of the lower die base 22, ensuring that the lower die base 22 can move smoothly and accurately. With the continuous driving of the drive motor 43, the lower die base 22 and the sheet material thereon gradually move to the bottom of the upper die base 21. At this time, the drive motor 43 stops running.

[0085] The hydraulic cylinder 31 is started, and the piston rod 32 of the hydraulic cylinder 31 pushes the upper die base 21 to move downward. During the downward movement of the upper die base 21, the guide rod 34 is driven to move downward synchronously. The guide rod 34 slides in the guide sleeve 33. The cooperation between the guide rod 34 and the guide sleeve 33 ensures the stability of the downward movement of the upper die base 21. As the upper die base 21 continues to move downward, the guide column 211 and the positioning column 212 are respectively inserted into the guide groove 221 and the positioning groove 222 on the lower die base 22, so as to realize the precise positioning and contact between the upper die base 21 and the lower die base 22, thereby completing the mold closing action. After the mold is closed, the upper die base 21 and the lower die base 22 apply pressure to the sheet material to complete the stamping operation, so that the sheet material forms a B-pillar product. The stamped B-pillar product is located in the mold cavity of the lower die base 22.

[0086] When the upper die base 21 moves downward and drives the positioning column 212 to insert into the positioning groove 222, the positioning column 212 moves downward continuously, pushing the limit plate 722 and the supporting link 721 to move downward, thereby driving the ejection plate 71 and the unloading ejector rod 732 to move downward synchronously, so that the upper end of the unloading ejector rod 732 is flush with the die cavity surface of the lower die base 22; at the same time, after the stamping of the B-pillar product is completed, the heating system is started by operating the control panel 12, and the heater 62 is used to generate kinetic energy and start working. Since a plurality of heating plates 63 are arranged above the heater 62, the plurality of heating plates 63 generate different amounts of heat through the precise control of the heater 62, so that different areas of the B-pillar product can be heated in different areas; and while maintaining pressure, the cooling system starts to operate, and the cooling pump 51 extracts cooling water from the cavity in the upper die base 21. The cooling water is transported by the cooling pump 51 and flows through the cooling pipe 5 in the external environment. 2. The cold air in the external environment cools the cooling water in the cooling pipe 52, and the cooled cooling water is then transported back to the inner cavity of the upper mold base 21 through the other end of the cooling pipe 52, so that the cooling water in the inner cavity of the upper mold base 21 continuously circulates, thereby accelerating the cooling effect of the B-pillar product in the cavity; as the temperature of the B-pillar product drops, the austenite structure inside it begins to transform into a martensite structure. Due to the use of zoned heating and differentiated cooling methods, the martensite content and microstructure obtained in different areas of the B-pillar product are different, realizing a gradient of material properties. The high-strength area obtains more martensite and has higher strength and hardness, while the medium-strength area has a relatively small martensite content and has a certain toughness. After appropriate zoned heating treatment, the performance of each area can be effectively guaranteed, thereby reducing unnecessary material use, realizing a lightweight design of the B-pillar, and reducing the overall weight of the car;

[0087] When the locking cam 721 is in the state of being unlocked, the locking cam 721 is in the state of being unlocked, and the lock cam 722 is in the state of being unlocked, and the lock cam 722 is in the state of being unlocked, and the lock cam 722 is in the state of being unlocked. And, it reduces the damage to the surface of the B-pillar product, and by reducing the ejection force and upward speed of the unloading ejector rod 732, the B-pillar product can be subjected to more uniform force during the ejection process, reducing deformation caused by uneven force; and the moment the elastic telescopic member 733 pushes the knocking member 734 to contact the speed reduction groove 7321, the knocking member 734 knocks the unloading ejector rod 732, causing resonance. The resonant vibration can quickly destroy the adsorption state between the B-pillar product and the side wall of the mold cavity of the lower mold base 22, so that the intermolecular force between the B-pillar product and the mold cavity is broken, the adsorption relationship becomes loose, and the adsorption force is greatly reduced. In addition, the vibration will also cause the B-pillar product and the mold cavity surface to undergo a slight relative movement, converting static friction into dynamic friction, significantly reducing the friction resistance during the ejection process, and greatly reducing the initial force required for the unloading ejector rod 732 to eject the B-pillar product, making the ejection process easier and smoother.

[0088] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A lightweight B-pillar partition heating and forming device, comprising a machine base (10) and a frame (11) arranged on the machine base (10), characterized in that: It also includes a punching assembly (20) disposed on the machine base (10) and the machine frame (11), and a material ejecting mechanism (70) disposed in the punching assembly (20); The stamping assembly (20) comprises an upper die base (21) and a lower die base (22), wherein a die cavity is provided on the upper side of the lower die base (22), a zone heating component (60) for zone heating the B-pillar is provided in the lower die base (22), and a cooling component (50) for cooling the B-pillar after heating is provided on the upper die base (21); A positioning column (212) is fixedly mounted on the bottom of the upper die base (21), and a positioning groove (222) matching the positioning column (212) is provided on the lower die base (22); The ejection mechanism (70) comprises an ejection plate (71) arranged in the lower die base (22), a support assembly (72) is arranged in the positioning groove (222), the bottom of the support assembly (72) is fixedly connected to the ejection plate (71), and a plurality of ejection assemblies (73) for unloading the formed B-pillar are symmetrically arranged on the upper side of the ejection plate (71).

2. The lightweight B-pillar partition heating and forming device according to claim 1, characterized in that: A guide column (211) is fixedly mounted on the bottom of the upper die base (21), and a guide groove (221) matching the guide column (211) is provided on the lower die base (22).

3. The lightweight B-pillar partition heating and forming device according to claim 1, characterized in that: The frame (11) is provided with a driving assembly (30) for driving the upper die base (21) to rise and fall. The driving assembly (30) includes a hydraulic cylinder (31) fixedly mounted on the frame (11). The bottom of the hydraulic cylinder (31) is fixedly connected to the upper die base (21) by a piston rod (32). A guide sleeve (33) is fixedly mounted on the frame (11), a guide rod (34) is slidably mounted on the inner side of the guide sleeve (33), and the lower end of the guide rod (34) is fixedly connected to the upper die base (21).

4. The lightweight B-pillar partition heating and forming device according to claim 1, characterized in that: The machine base (10) is provided with a transfer assembly (40) for driving the lower die base (22) to move forward and backward, and the transfer assembly (40) includes a transfer plate (41) fixedly assembled on the rear side of the machine base (10), a transfer frame (42) fixedly mounted on the bottom of the transfer plate (41), a drive motor (43) fixedly mounted on one side of the transfer frame (42), an output end of the drive motor (43) is fixedly connected to a threaded screw (44), a transfer block (45) is movably mounted on the threaded screw (44), and an upper side of the transfer block (45) is fixedly connected to the lower die base (22); A guide rail (46) is fixedly mounted on the upper side of the machine base (10), and a guide slider (47) is slidably mounted on the guide rail (46). The upper side of the guide slider (47) is fixedly connected to the lower die base (22).

5. The lightweight B-pillar partition heating and forming device according to claim 1, characterized in that: The zoned heating component (60) includes a mounting frame (61) fixedly assembled in the lower mold base (22), a heater (62) fixedly mounted on the mounting frame (61), and a plurality of heating plates (63) for zoned heating of the B-pillar product are provided on the upper side of the heater (62); A heat conduction plate (223) is fixedly installed in the lower die base (22), and the upper side of the heating plate (63) is in contact with the heat conduction plate (223).

6. The lightweight B-pillar partition heating and forming device according to claim 1, characterized in that: An inner cavity is provided inside the upper die base (21), and cooling water is provided in the inner cavity. The cooling component (50) includes a cooling pump (51) fixedly assembled on the left side of the upper die base (21), a cooling pipe (52) is fixedly connected to one side of the cooling pump (51), and an end of the cooling pipe (52) away from the cooling pump (51) is fixedly connected to the right side of the upper die base (21).

7. The lightweight B-pillar partition heating and forming device according to claim 1, characterized in that: The support assembly (72) includes a support connecting rod (721) movably mounted in a positioning groove (222), a limit plate (722) being fixedly mounted on the upper end of the support connecting rod (721), a lower end of the support connecting rod (721) being fixedly connected to the ejecting plate (71), and a support spring (723) being sleeved around the outer periphery of the support connecting rod (721).

8. The lightweight B-pillar partition heating and forming device according to claim 1, characterized in that: The ejector assembly (73) includes a fixed sleeve rod (731) fixedly assembled in the lower die base (22), a discharge ejector rod (732) is slidably mounted on the inner side of the fixed sleeve rod (731), and a plurality of speed reduction grooves (7321) are formed on the outer periphery of the discharge ejector rod (732); An elastic telescopic member (733) is fixedly mounted on the inner wall of the fixed sleeve rod (731), and a knocking member (734) is fixedly connected to one end of the elastic telescopic member (733) facing the discharge push rod (732).

9. The lightweight B-pillar partition heating and forming device according to claim 1, characterized in that: A control panel (12) is fixedly mounted on the front side of the machine base (10).

10. A lightweight B-pillar partition heating and forming process, applied to a lightweight B-pillar partition heating and forming device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: First, the preheated sheet material is accurately placed on the lower die base (22); S2: By starting the driving motor (43), the transfer block (45) and the lower die base (22) are driven to move forward, and as the driving motor (43) continues to drive, the lower die base (22) and the plate material thereon gradually move to the position directly below the upper die base (21), at which time the driving motor (43) stops running; S3: The hydraulic cylinder (31) is started, and the piston rod (32) of the hydraulic cylinder (31) pushes the upper die base (21) to move downward, and the guide column (211) and the positioning column (212) on the upper die base (21) are respectively inserted into the guide groove (221) and the positioning groove (222) on the lower die base (22), so as to achieve accurate positioning and contact between the upper die base (21) and the lower die base (22), thereby completing the mold closing action; S4: After the mold is closed, the upper mold base (21) and the lower mold base (22) apply pressure to the sheet material to complete the stamping operation, so that the sheet material is formed into a B-pillar product, and the stamped B-pillar product is located in the mold cavity of the lower mold base (22); S5: starting the heating system, using the heater (62) to generate kinetic energy and start working, and through the precise control of the heater (62), the multiple heating plates (63) generate different amounts of heat, so that different areas of the B-pillar product can be heated in different zones; S6: starting the cooling system, the cooling pump (51) extracts the cooling water in the cavity of the upper die base (21), so that the cooling water in the cavity of the upper die base (21) continuously circulates, thereby accelerating the cooling of the B-pillar product in the cavity; S7: Finally, the B-pillar product formed in the mold cavity of the lower mold base (22) is pushed by the unloading push rod (732) to perform demoulding operation, thereby realizing the self-demolding of the B-pillar product and continuing the next cycle.

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