A multi-part hot stamping die, a part thermoforming system having the same, and a part forming method

Abstract

The present application relates to the field of mould, specifically a kind of hot stamping die for multiple parts and the part hot forming system and part forming method with the hot stamping die, including lower die structure and upper die structure;The lower die structure includes lower die holder, and the upper die structure includes upper die holder;Upper die holder and lower die holder between being equipped with mould core structure;The mould core structure includes multiple mould core mechanisms;The present application can realize the forming operation of multiple same or different parts by the design of multiple mould core mechanisms;Stamping frequency cost can be reduced, and multiple parts are formed by one-step hot pressing, which greatly improves the efficiency and stability of hot stamping parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of molds, in particular to a hot stamping die for multiple parts, a part hot forming system with the hot stamping die and a part forming method. BACKGROUND

[0002] With the increasing demand for automobile safety performance, the previous solution to improve the safety of the vehicle body is to increase the thickness of the vehicle body sheet metal. This solution is simple and convenient, but it increases the overall vehicle mass, thereby increasing the manufacturing cost and kinetic energy consumption of the automobile. The hot stamping part solves such problems, and its characteristics are that the strength can be improved by 20%-40% without changing the thickness of the part, and its shortcomings are that the material has high tensile strength, is easy to twist and rebound during forming, has multiple die processes, and has high part development cost.

[0003] At the same time, traditional one-piece die forming a type of part, the vehicle stamping parts are more, which causes the mold types to be numerous, greatly increasing the mold investment cost.

[0004] And the production of multiple types of molds has low overall production efficiency, which is not conducive to improving the part processing efficiency.

[0005] The existing patent CN217346888U-hot forming die with synchronous trimming function does not explicitly disclose the technical content of solving the above technical problems.

[0006] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing hot forming die. SUMMARY

[0007] The purpose of the present application is to provide a hot stamping die capable of forming multiple parts at one time.

[0008] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0009] A hot stamping die for multiple parts, comprising a lower die structure and an upper die structure;

[0010] The lower die structure comprises a lower die seat, and the upper die structure comprises an upper die seat;

[0011] The upper die seat and the lower die seat are provided with a die core structure therebetween;

[0012] The die core structure comprises a plurality of die core mechanisms;

[0013] Each of the die core mechanisms comprises an upper die core provided on the upper die seat and a lower die core provided on the lower die seat; the upper die core and the lower die core are oppositely arranged;

[0014] Each of the mold core mechanisms comprises a limiting assembly; the limiting assembly comprises an end positioning component and a side positioning component;

[0015] The end positioning component comprises a guide pin arranged on the lower mold base;

[0016] The side positioning component comprises a plurality of material positioning racks, and the plurality of material positioning racks are distributed at the peripheral positions of the corresponding lower mold cores; the lower mold base is provided with a water cooling structure.

[0017] The plurality of mold core mechanisms are centrally symmetrically distributed on the lower mold base.

[0018] The water cooling structure comprises a water inlet and a water outlet; the lower mold base is provided with a cooling water channel; the water inlet is connected to the water outlet through the cooling water channel.

[0019] A part hot forming system comprises a machine tool and a feeding system; the machine tool is provided with a workbench, and the workbench is provided with the multi-part hot stamping die; the feeding system comprises a transfer device; the transfer device is used for transferring a part blank to be stamped.

[0020] The part hot forming system further comprises a pre-positioning structure; the pre-positioning structure comprises a positioning box; the positioning box is provided with a placing groove for part placement.

[0021] A part forming method based on the part hot forming system, the forming method comprising the following steps:

[0022] Step 1: Assemble the hot stamping die and calibrate the hot stamping die;

[0023] Step 2: Heat the part blank to be stamped to a predetermined temperature, and place the part blank to be stamped in the mold core structure through the transfer device;

[0024] Step 3: After step 2 is completed, start the driving part of the upper mold structure; control the upper mold structure to move towards the side close to the lower mold structure; realize the forming of the part to be stamped through the extrusion of the upper mold structure and the lower mold structure;

[0025] Step 4: After step 3 is completed, start the driving part of the upper mold structure; make the upper mold structure move away from the lower mold structure; make the upper mold structure and the formed part complete the demolding operation;

[0026] Step 5: After step 4 is completed, transfer the formed part to a predetermined area according to a set motion track through the transfer device; if a new part needs to be stamped, steps 2-4 can be repeated.

[0027] Before step 2 starts, the water cooling structure needs to be started to supply water to the lower mold base.

[0028] After water supply of the lower die base, the water supply is required to be preserved first; then after the part is formed, the water outlet is opened to discharge the water from the inside and outside of the lower die base.

[0029] At least one die core mechanism can realize the synchronous stamping forming of two different parts; by controlling the corresponding die core mechanism, one lower die core can form two different parts.

[0030] The parts after stamping forming also need to be cut into shape.

[0031] The advantages of the present application are:

[0032] The present application discloses a hot stamping die for multiple parts, and a part hot forming system and a part forming method with the hot stamping die.

[0033] The present application can realize the forming operation of multiple same or different parts by one hot stamping die through the design of multiple die core mechanisms; the stamping frequency cost can be reduced, and multiple parts can be one-step hot stamping forming, which greatly improves the efficiency and stability of hot stamping parts. DETAILED DESCRIPTION

[0034] The content expressed by each figure of the present application specification and the marks in the figures are briefly described as follows:

[0035] Figure 1 It is a structural schematic view of the whole structure of the die in the present application;

[0036] Figure 2 It is a structural schematic view of the upper die structure in the present application;

[0037] Figure 3 It is a structural schematic view of the lower die structure in the present application

[0038] Figure 4 It is a structural schematic view of the limiting assembly in the present application.

[0039] Figure 5 It is a structural schematic view of the transfer device in the present application.

[0040] Figure 6 It is a schematic view of the hot forming die surface in the present application.

[0041] The marks in the above figures are as follows:

[0042] 1, upper die structure, 2, lower die structure, 3, water inlet, 4, water outlet, 5, material fixing frame, 6, guide pin, 7, to be stamped part blank, 8, transfer device. DETAILED DESCRIPTION

[0043] The specific embodiments of the present application are further described in detail by comparing the figures and describing the optimal embodiments.

[0044] A hot stamping die for multiple parts, comprising a lower die structure 2 and an upper die structure 1; the lower die structure 2 comprises a lower die seat 21, and the upper die structure 1 comprises an upper die seat 11; a die core structure is arranged between the upper die seat 11 and the lower die seat 21; the die core structure comprises a plurality of die core mechanisms; through the design of the plurality of die core mechanisms, the hot stamping die can realize the forming operation of multiple same or different parts; the stamping frequency cost can be reduced, and multiple parts can be formed by one-step hot pressing, thereby greatly improving the efficiency and stability of hot stamping parts.

[0045] The hot stamping die for multiple parts disclosed in the application is mainly used for one-step forming of multiple parts.

[0046] Specifically, the hot stamping die disclosed in the application mainly comprises a lower die structure 2 and an upper die structure 1; the lower die structure 2 comprises a lower die seat 21, and the upper die structure 1 comprises an upper die seat 11; a die core structure is arranged between the upper die seat 11 and the lower die seat 21; the die core structure comprises a plurality of die core mechanisms; the lower die seat 21 and the upper die seat 11 of the application are main seat body structures, and the die core structure is mainly a forming area of parts; in the application, the die core structure comprises a plurality of die core mechanisms; each die core mechanism can at least realize the forming operation of one part.

[0047] In the application, each die core mechanism comprises an upper die core 12 arranged on the upper die seat 11 and a lower die core 22 arranged on the lower die seat 21; the upper die core 12 and the lower die core 22 are oppositely arranged; through the cooperation of the upper die core 12 and the lower die core 22, the forming operation of the corresponding part can be realized.

[0048] The specific structure of the upper die core 12 and the lower die core 22 can be made according to the shape of the part to be formed.

[0049] Further, in the application, each die core mechanism comprises a limiting assembly; the limiting assembly comprises an end positioning part and a side positioning part; the limiting assembly disclosed in the application can ensure the stability of the arrangement of the part blank to be formed on the corresponding lower die core 22, and is beneficial to ensuring the stability of the position of the part blank to be formed in subsequent forming.

[0050] Specifically, in the application, the end positioning part comprises a guide pin 6 arranged on the lower die seat 21; the guide pin 6 is inserted into a positioning hole at the end of the part blank to be formed, so as to limit the position of the end of the part blank to be formed; and the side positioning part comprises a plurality of material positioning racks 5, and the plurality of material positioning racks 5 are distributed at the peripheral positions of the corresponding lower die cores 22; the material positioning rack 5 is generally an L-shaped support structure, and mainly extrudes and limits the part blank to be formed, so as to realize the lateral fiber of the part blank to be formed.

[0051] In order to avoid interference, the positioning holes at the end of the blank of the part to be formed are required to be one circular hole and one U-shaped hole or a waist-shaped hole.

[0052] Meanwhile, the lower die seat 21 is provided with a water cooling structure in the present application; through the arrangement of the water cooling structure, the cooling operation of the lower die seat 21 can be realized, the heat dissipation of the formed part is facilitated and fast, and the part processing efficiency is accelerated.

[0053] Further, the plurality of die core mechanisms are centrally symmetrically distributed on the lower die seat 21 in the present application; based on the above design, the present application can ensure that the hot stamping die is balanced in overall stress; in the present application, the uniformly distributed and centrally symmetrically distributed die core mechanisms can ensure that the die is more uniformly stressed when working, and avoid deformation or damage of the die due to uneven stress.

[0054] This helps to improve the service life of the die and the quality of the product.

[0055] In addition, based on the above design, the processing and manufacturing of the hot stamping die can be facilitated; that is, the manufacturing process is simplified: the symmetric structure of the die is more convenient to process and manufacture, which can reduce the processing difficulty and cost.

[0056] Whether it is die production or machining method, the symmetric structure can reduce the manufacturing difficulty and improve the production efficiency.

[0057] Compact overall structure saves space: the centrally symmetrically distributed die core mechanism can more effectively utilize the space of the die, making the die structure more compact. This not only helps to reduce the size of the die, but also saves costs.

[0058] Motion consistency and stability avoid interference: the plurality of die core mechanisms are centrally symmetrically distributed, which can ensure the consistency and stability of each die core mechanism when moving, avoiding mutual interference.

[0059] Reduce part adjustment time: the symmetric structure of the die core structure is more convenient to install and debug, which can reduce the adjustment time and improve the production efficiency; at the same time, the symmetric structure of the die is easier to maintain and maintain during use.

[0060] Ensure uniform cooling of product quality: the centrally symmetrically distributed die core mechanism can ensure that the cooling system design inside the die is more reasonable, so that the cooling water is uniformly distributed, thereby ensuring that the heat of the product is uniformly taken away by the cooling water, reducing the temperature difference of each part of the cavity, and improving the product quality.

[0061] Reduce the number of parts: the center-symmetric distribution of the core mechanism can reduce the number of parts, because the mold of symmetrical structure can use more standard parts and universal parts, thereby reducing the manufacturing cost; improve the strength and rigidity of the mold: the mold of symmetrical structure can better consider the overall strength and rigidity of the mold when designing, avoid the deformation or damage of the mold caused by excessive local stress, and improve the service life of the mold.

[0062] The plurality of core mechanisms are centrally symmetrically distributed on the lower die seat 21, which can bring many benefits such as balanced stress, convenient processing and manufacturing, compact structure, consistent and stable movement, improved production efficiency, guaranteed product quality, reduced cost and improved mold strength.

[0063] Further, in the present application, the water cooling structure includes a water inlet 3 and a water outlet 4; the lower die seat 21 is provided with a cooling water channel; the water inlet 3 is connected with the water outlet 4 through the cooling water channel; during use, cooling water enters the cooling water channel in the lower die seat 21 from the water inlet 3; in the cooling water channel, the cooling water contacts the inner wall of the lower die seat 21 and absorbs the heat generated by the lower die seat 21 during operation; after absorbing heat, the cooling water temperature rises and then flows out from the water outlet 4.

[0064] A part hot forming system includes a machine tool and a feeding system, the machine tool is provided with a workbench, and the hot stamping die for multiple parts is arranged on the workbench; the feeding system includes a transfer device 8; the transfer device 8 is used for transferring the part blank 7 to be stamped; in the present application, the machine tool is the core equipment of the whole part hot forming system, which provides an installation platform and a power source for the hot stamping die.

[0065] During the hot forming process, the machine tool can accurately control the up-down movement of the die to realize the stamping forming of the part blank.

[0066] The workbench is an important part of the machine tool, which is located on the main structure of the machine tool.

[0067] The hot stamping die is installed on the workbench.

[0068] The workbench needs to have sufficient strength and rigidity to bear the weight of the die and the part blank and the impact force in the stamping process.

[0069] The feeding system mainly includes a transfer device 8, which is a key component of the feeding system, and its main function is to transfer the part blank 7 to be stamped from the storage position or the previous process to the hot stamping die on the workbench of the machine tool.

[0070] The transfer device 8 can have many types, such as a mechanical hand, a conveyor belt, a hopper, etc.

[0071] For example, a robot can precisely grasp a blank and place it in the designated position of the mold according to the preset path.

[0072] The movement precision and flexibility of the robot are crucial for ensuring the accurate placement of the blank.

[0073] Conveyors are suitable for mass production and continuous production. They can continuously transport blanks to the vicinity of the machine tool and then use other auxiliary devices to feed the blanks into the mold.

[0074] System workflow

[0075] Blank preparation stage

[0076] First, the blank 7 for stamping needs to be prepared.

[0077] These blanks are usually metal plates or profiles that have undergone preliminary processing such as shearing, heating, etc.

[0078] For example, in the hot forming of automobile body parts, the blank may be a high-strength steel plate heated to a certain temperature in a heating furnace to improve its plasticity and facilitate subsequent stamping forming.

[0079] Feeding stage

[0080] The feeding system starts working. The transfer device 8 (such as a robot) grasps the heated blank from the blank storage location according to the preset program.

[0081] Stamping forming stage; when the blank is placed, the machine tool starts working.

[0082] The power system of the machine tool drives the upper die of the hot stamping mold on the workbench to move downward.

[0083] The upper and lower dies cooperate with each other during stamping to exert a large pressure on the blank.

[0084] Under the combined action of high temperature and high pressure, the blank undergoes plastic deformation and gradually forms the required part according to the shape of the mold.

[0085] Finished product removal stage; after stamping forming is completed, the upper die moves upward and away from the lower die.

[0086] At this time, the transfer device 8 (such as a robot) in the feeding system again plays a role in removing the formed part from the mold and placing it in the finished product storage area or subsequent processing process position.

[0087] When the above system is working, it needs to be operated carefully to avoid damaging the formed part.

[0088] The part hot forming system realizes efficient and accurate hot forming processing of the part through the cooperation of the machine tool and the feeding system.

[0089] Further, the part hot forming system further comprises a pre-positioning structure, the pre-positioning structure comprising a positioning box; the positioning box is provided with a placing groove for placing the part; the positioning box is the main carrier of the pre-positioning structure, and is usually a box structure with certain strength and rigidity.

[0090] The size and shape of the positioning box are designed according to the size and shape of the blank 7 of the part to be stamped.

[0091] The material of the positioning box needs to have the characteristics of high temperature resistance and wear resistance.

[0092] Because the blank is usually in a high temperature state during the part hot forming process, and may rub against the positioning box during the transfer and pre-positioning process.

[0093] Commonly used materials include high-strength aluminum alloy and stainless steel.

[0094] Aluminum alloy has the advantages of light weight and high strength, which can reduce the burden of the entire feeding system; stainless steel has good high temperature resistance and corrosion resistance, which can adapt to harsh working environments.

[0095] The placing groove is a special area inside the positioning box for placing the part blank.

[0096] Its main function is to preliminarily position the blank and ensure that the blank is in the correct position and posture before entering the hot stamping die.

[0097] The shape and size of the placing groove match the shape and size of the blank, and can tightly accommodate the blank, reducing the movement and shaking of the blank during the transfer process.

[0098] The bottom and side surface of the placing groove are usually designed with positioning protrusions or positioning grooves, which cooperate with the corresponding features on the blank to achieve accurate positioning.

[0099] For example, for some blanks with positioning holes, the corresponding position of the placing groove is designed with a positioning pin, which is inserted into the positioning hole of the blank when the blank is placed in the placing groove, thereby fixing the position of the blank.

[0100] At the same time, the surface of the placing groove is subjected to certain surface treatment, such as adding anti-skid texture or coating, to increase the friction between the blank and the placing groove and prevent the blank from sliding.

[0101] Working process of the pre-positioning structure in the system

[0102] Blank placing stage

[0103] After the feeding system transports the blank 7 of the part to be stamped to the predetermined position near the worktable of the machine tool, the transfer device 8 (such as a robot) places the blank into the placing groove of the positioning box.

[0104] During this process, the transfer device 8 needs to accurately place the blank into the placing groove according to the shape and position of the placing groove, and ensure that the blank cooperates with the positioning features in the placing groove. For example, the gripping device of the robot adjusts the gripping angle and force according to the shape of the blank and the position of the placing groove, and smoothly places the blank into the placing groove.

[0105] The pre-positioning stage;

[0106] When the blank is placed into the placing groove, the pre-positioning structure begins to work.

[0107] The positioning protrusions or grooves in the placing groove cooperate with the blank to preliminarily position the blank.

[0108] This pre-positioning process can ensure that the position and posture of the blank meet certain accuracy requirements before entering the hot stamping die.

[0109] For example, when hot forming some parts with complex shapes, pre-positioning can ensure that the symmetry axis of the blank is basically coincident with the symmetry axis of the die, reducing the deviation of the blank during stamping and improving the forming accuracy.

[0110] After the pre-positioning is completed, the feeding system is started again to transport the pre-positioned blank to the hot stamping die on the worktable of the machine tool.

[0111] During the transportation process, since the blank has been pre-positioned, it can maintain a relatively stable position and posture, so that it can be accurately placed in the lower die part of the hot stamping die, and then the subsequent stamping forming process is carried out.

[0112] By adding the pre-positioning structure, the part hot forming system can more accurately control the position and posture of the blank, improve the forming accuracy and quality stability of the part, and is especially suitable for hot forming processing of complex parts with high precision requirements.

[0113] A part forming method based on the part hot forming system, the forming method comprising the following steps:

[0114] Step 1: Assemble the hot stamping die and calibrate the hot stamping die;

[0115] Step 2: Heat the blank 7 of the part to be stamped to a predetermined temperature, and place the blank 7 of the part to be stamped in the core structure by the transfer device 8;

[0116] Step 3: After step 2 is completed, start the driving part of the upper die structure 1; control the upper die structure 1 to move towards the side close to the lower die structure 2; through the extrusion of the upper die structure 1 and the lower die structure 2, the forming of the parts to be punched is realized;

[0117] Step 4: After step 3 is completed, start the driving part of the upper die structure 1; make the upper die structure 1 move away from the lower die structure 2; make the upper die structure 1 complete the demolding operation with the formed parts;

[0118] Step 5: After step 4 is completed, the formed parts are transferred to the pre-set specified area by the transfer device 8 according to the set motion track, and if new parts need to be punched, steps 2-4 can be repeated.

[0119] The part forming method can realize the forming processing of the parts.

[0120] Specifically,

[0121] Step 1: Assemble the hot stamping die and calibrate the hot stamping die;

[0122] Assembling the hot stamping die first requires assembling the various components of the hot stamping die (such as the upper die, the lower die, the die core, etc.) according to the design drawings and technical requirements.

[0123] This process needs to ensure the cooperation precision between the components, for example, the cooperation gap of the upper die and the lower die should meet the requirements, and the coaxiality of the die core and the die cavity should also meet the geometric precision standards. During assembly, professional assembly tools and equipment such as precise bolt tightening equipment and positioning clamps are usually used to ensure the assembly quality.

[0124] Calibration and calibration;

[0125] After assembly, the hot stamping die needs to be calibrated and calibrated.

[0126] This step is to ensure that the die can accurately form parts during actual use.

[0127] The calibration and calibration content includes the dimensional accuracy and positional accuracy of the die.

[0128] For example, a three-coordinate measuring instrument can be used to measure the key dimensions of the die (such as the cavity size, positioning pin hole position, etc.), and the measured size is compared with the designed size. If there is a deviation, it needs to be adjusted.

[0129] At the same time, the installation position of the die also needs to be calibrated to ensure that the installation position of the die on the machine tool workbench is accurate and matches the motion coordinate system of the machine tool, so as to ensure the cooperation accuracy of the die and the machine tool during the stamping process.

[0130] Step 2: Heat the blank 7 of the part to be punched to a predetermined temperature, and place the blank 7 of the part to be punched in the core structure through the transfer device 8;

[0131] The blank of the part to be punched needs to be heated first. Heating to a predetermined temperature is to make the blank have better plasticity, so as to facilitate plastic deformation in the subsequent punching process.

[0132] The heating equipment can be a heating furnace. The heating temperature should be determined according to the material properties of the blank. For example, for some high-strength steel plate blanks, the heating temperature may be around 800-900 degrees Celsius. During heating, the heating speed and holding time should be controlled to ensure uniform temperature of the blank and avoid overheating or underheating.

[0133] Transfer the blank and place it in the core structure;

[0134] The heated blank is transferred by the transfer device 8 (such as a robot) of the feeding system. The transfer device 8 needs to choose the appropriate grabbing method according to the temperature and shape characteristics of the heated blank.

[0135] For example, for high-temperature blanks, the grabbing device of the robot may need to be wrapped with heat insulation materials to prevent high temperature from damaging the robot.

[0136] Then, the blank is accurately placed in the core structure.

[0137] The core structure is the part of the mold that forms the internal shape of the part. After the blank is placed in the core structure, it is necessary to ensure that its position is correct and matches the positioning features of the core.

[0138] Step 3: After step 2 is completed, start the drive part of the upper die structure 1; control the upper die structure 1 to move towards the side close to the lower die structure 2; realize the forming of the part to be punched by the extrusion of the upper die structure 1 and the lower die structure 2;

[0139] Start the drive part of the upper die structure 1;

[0140] After the blank is placed, start the drive system of the machine tool to drive the upper die structure 1 to move downward.

[0141] The drive part can be a hydraulic cylinder, a pneumatic cylinder, or an electric servo drive device, etc.

[0142] Different driving methods have different characteristics. For example, hydraulic drive has greater driving force, suitable for punching of large molds and thick blanks; electric servo drive has higher control accuracy and response speed, and can realize complex punching process.

[0143] Extrusion forming of the upper die structure 1 and the lower die structure 2;

[0144] The upper die structure 1 moves downward and cooperates with the lower die structure 2 to extrude the blank placed in the die core structure.

[0145] Under the action of high temperature and high pressure, the blank undergoes plastic deformation and gradually fills the die cavity to form the required part shape.

[0146] During this process, the downward speed and pressure of the upper die need to be controlled to ensure the forming quality of the part.

[0147] Step 4: After step 3 is completed, start the driving part of the upper die structure 1; make the upper die structure 1 move away from the lower die structure 2; make the upper die structure 1 complete the demolding operation with the molded part;

[0148] Start the driving part of the upper die structure 1 to perform demolding;

[0149] After molding is completed, start the driving part of the upper die structure 1 again, this time making the upper die move upward and away from the lower die.

[0150] Demolding is an important part of the stamping forming process, which needs to ensure that the molded part can be smoothly taken out of the die without damage or deformation.

[0151] During demolding, the upward speed of the upper die should be moderate, too fast may cause the part to collide in the die and be damaged, too slow will affect the production efficiency.

[0152] Step 5: After step 4 is completed, transfer the molded part to the pre-set specified area by the transfer tool 8 according to the set motion trajectory, if new parts need to be stamped, repeat steps 2-4.

[0153] Transfer the molded part, the demolded part is transferred by the transfer tool 8 of the feeding system.

[0154] The transfer tool 8 transfers the part to the finished product storage area or the subsequent processing procedure position according to the pre-set motion trajectory. The design of the motion trajectory should consider the space layout of the production site and the rationality of the production process.

[0155] For example, in an automatic production line, the motion trajectory of the transfer tool 8 may match the positions of subsequent detection equipment, heat treatment equipment, etc., to realize continuous processing of the parts.

[0156] Cyclic operation, when the stamping forming process of a part is completed, if new part stamping operation is needed, repeat steps 2-4.

[0157] This cyclic operation reflects the characteristics of automation and continuous production of the part hot forming system.

[0158] In actual production, through precise control program and automatic equipment, high efficiency and high quality batch production of parts can be realized.

[0159] The forming method disclosed by the application is suitable for production of parts of various materials and shapes.

[0160] By adjusting the heating temperature, the mold shape and the stamping parameters, parts of different materials (such as various steels, aluminum alloys and the like) and different complexity can be produced. For example, in automobile manufacturing, both simple cover parts and complex reinforcing parts and structural parts can be produced.

[0161] Further, in the application, before step 2 starts, the water cooling structure needs to be started to supply water to the lower die seat 21; based on this design, the lower die core 22 can be pre-cooled by the water cooling structure to reduce the damage of the heated parts to the lower die core 22; before step 2 (heating the part blank 7 to be stamped to a predetermined temperature and placing the part blank 7 to be stamped in the die core structure by the transfer device 8) starts, the water cooling structure needs to be started first.

[0162] This is because the lower die seat 21 will receive a large amount of heat in the subsequent stamping process, especially when the high-temperature blank is put into the mold and the stamping starts, the temperature of the lower die seat 21 will rise rapidly; starting the water cooling structure in advance can make the cooling water pre-fill the cooling water channel to prepare for effective cooling.

[0163] Further, in the application, after the lower die seat 21 is supplied with water, it is required to supply water and maintain pressure first; then after the part is formed, the water outlet 4 is opened to drain the water from the inside and outside of the lower die seat 21; in the application, after the lower die seat 21 is supplied with water, it is required to supply water and maintain pressure first.

[0164] This is to ensure that the cooling water channel is filled with cooling water and maintains a certain pressure.

[0165] The pressure maintaining function is as follows: first, it plays a good protection role, effectively protecting the cooling of the lower die seat 21 and / or the lower die core 22, and in addition, it can prevent pressure fluctuations or cooling water leakage in the cooling water channel due to blank deformation or mold vibration during stamping.

[0166] At the same time, stable water pressure can ensure the uniformity and continuity of the cooling effect, and secondly, pressure maintaining can also enhance the sealing performance of the cooling water channel to a certain extent.

[0167] At the interface or connection of the cooling water channel, appropriate water pressure can make the sealing element (such as a sealing ring) fit better, reduce the leakage of cooling water, and avoid the adverse effects of cooling water on the mold or other parts of the machine tool.

[0168] After forming, drain water, after the part is formed (after step 3 is completed), open the water outlet 4 again, and drain the water from the inside and outside of the lower die seat 21.

[0169] Based on the above design, the influence of continuously flowing water on the stamping forming temperature of the part can be avoided.

[0170] This is because during the stamping forming process, the lower die seat 21 needs to continuously absorb heat to ensure that the temperature of the mold is relatively stable, thereby facilitating the forming quality of the blank.

[0171] When the part is formed, the control requirement of the stamping process on the temperature is relatively reduced, at this time, the cooling water that has absorbed heat can be discharged to prepare for the cooling cycle of the next stamping process; discharging hot water not only can take away the heat in the lower die seat 21 and reduce the temperature of the lower die seat 21, but also can avoid the influence of the long-term residence of the cooling water in the lower die seat 21 on the service life of the mold; in addition, the continuously flowing cooling water can quickly realize the cooling operation of the formed part on the lower die core 22.

[0172] Further, in the present application, at least one die core mechanism can realize the synchronous stamping forming of two different parts; by controlling the corresponding die core mechanism, one lower die core 22 can form two different parts; based on such a setting, material waste can be reduced, and the production cost of the part can be reduced.

[0173] Further, in the present application, the parts after stamping forming also need to be cut; the parts after stamping forming also need to be cut; here, one thing is to cut the edge material or pre-material of the two formed parts, and the other thing is to cut the two parts produced by the above-mentioned one lower die core 22, so as to facilitate the separation of the two different parts.

[0174] Based on the above design and operation, the generation of waste material can be greatly reduced, the material utilization rate can be optimized, and the production cost can be reduced.

[0175] Specifically:

[0176] The purpose of the present application is to provide a hot stamping die which can be used for one-step forming of multiple parts, and in the use process, the state of the produced parts is stable, and the mold is convenient for later maintenance and maintenance.

[0177] The technical scheme adopted by the present application is: a one-step hot forming process for multiple parts, comprising an upper die structure 1 and a lower die structure 2, the upper die structure 1 comprising an upper die seat 11, the upper die seat 11 being provided with an upper die core 12.

[0178] The lower die structure 2 comprises a lower die seat 21, and the lower die seat 21 is provided with a lower die core 22.

[0179] The hot stamping die disclosed by the application can reduce stamping frequency cost, and multiple parts can be one-step hot press formed, thereby greatly improving hot stamping part efficiency and stability.

[0180] A use method of the stamping die, the use method comprising the following steps:

[0181] Step 1: Assemble the hot stamping die, and calibrate and demarcate each component.

[0182] Step 2: Heat the to-be-stamped part blank 7 to a predetermined temperature, and place the part blank in the lower die core 22 of the lower die structure 2 through the transfer device 8.

[0183] Step 3: After step 2 is completed, start the driving part of the upper die seat 11; control the upper die structure 1 to move to the side close to the lower die structure 2; through extrusion of the upper die structure 1 and the lower die structure 2, drive the force movement of the pressure source, and realize forming of the to-be-stamped part.

[0184] Step 4: After step 3 is completed, start the driving part of the upper die structure 1, so that the upper die structure 1 moves to the side away from the lower die structure 2; under the action of the reset mechanism and force release of the pressure source; make the upper die structure 1 and the formed part complete demolding operation.

[0185] Step 5: After step 4 is completed, transfer the formed part to a predetermined area according to a set movement track through the transfer device 8, and if other parts need to be stamped, steps 2-4 can be repeated.

[0186] Obviously, the specific implementation of the application is not limited by the above method, and various non-essential improvements using the method concept and technical scheme of the application are within the protection scope of the application.

Claims

1. A method of forming a part based on a hot forming system of the part, characterized by, The part hot forming system comprises a machine tool and a feeding system, the machine tool is provided with a workbench, and the workbench is provided with a multi-part hot stamping die; The feeding system comprises a transfer device; the transfer device is used for transferring a part blank to be stamped; The part hot forming system further comprises a pre-positioning structure, and the pre-positioning structure comprises a positioning box; the positioning box is provided with a placing groove for part placement; The multi-part hot stamping die comprises a lower die structure and an upper die structure; The lower die structure comprises a lower die seat, and the upper die structure comprises an upper die seat; The upper die seat and the lower die seat are provided with a die core structure therebetween; The die core structure comprises a plurality of die core mechanisms; Each die core mechanism comprises an upper die core arranged on the upper die seat and a lower die core arranged on the lower die seat; the upper die core and the lower die core are oppositely arranged; Each die core mechanism comprises a limiting assembly; the limiting assembly comprises an end positioning component and a side positioning component; The end positioning component comprises a guide pin arranged on the lower die seat; The side positioning component comprises a plurality of material positioning racks, and the plurality of material positioning racks are distributed at the peripheral positions of the corresponding lower die cores; the lower die seat is provided with a water cooling structure; The part forming method comprises the following steps: Step 1: assemble the hot stamping die and calibrate the hot stamping die; Step 2: heat the part blank to be stamped to a predetermined temperature, and place the part blank to be stamped in the die core structure through the transfer device; Before the step 2 starts, the water cooling structure needs to be started to supply water to the lower die seat; After the lower die seat is supplied with water, the water supply needs to be kept constant; then, after the part is formed, the water outlet is opened to drain the water from the lower die seat; Step 3: after step 2 is completed, the driving part of the upper die structure is started; the upper die structure is controlled to move towards the side close to the lower die structure; through the extrusion of the upper die structure and the lower die structure, the forming of the part to be stamped is realized; Step 4: after step 3 is completed, the driving part of the upper die structure is started; the upper die structure is moved away from the lower die structure; the upper die structure and the formed part are demolded; Step 5: after step 4 is completed, the formed part is transferred to a predetermined area through the transfer device according to a set motion track; if a new part needs to be stamped, steps 2-4 are repeated.

2. The method of claim 1, wherein the forming of the part is based on a hot forming system. The plurality of die core mechanisms are centrally symmetrically distributed on the lower die seat.

3. The method of claim 1, wherein the forming of the part is based on a hot forming system. The water cooling structure comprises a water inlet and a water outlet; the lower die seat is provided with a cooling water channel; the water inlet is connected with the water outlet through the cooling water channel.

4. The method of claim 1, wherein the system is a hot forming system. At least one die core mechanism can realize the synchronous stamping forming of two different parts; by controlling the corresponding die core mechanism, one lower die core can form two different parts.

5. The method of claim 1, wherein the system is a hot forming system. The stamped part needs to be cut into shape.

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