Hot stamping die for multiple parts, part hot forming system with hot stamping die and part forming method

Abstract

The invention relates to the field of dies, 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. The lower die structure comprises a lower die base, and the upper die structure comprises an upper die base. A mold core structure is arranged between the upper mold base and the lower mold base; the mold core structure comprises a plurality of mold core mechanisms; according to the hot stamping die, through the design of the multiple die core mechanisms, forming operation of multiple identical or different parts can be achieved through one hot stamping die; the stamping frequency cost can be reduced, meanwhile, multiple parts are subjected to one-step hot press forming, and the part hot stamping efficiency and stability are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of dies, in particular to a hot stamping die for multiple parts, a part hot forming system having the hot stamping die, and a part forming method. Background Art

[0002] As people's requirements for automobile safety performance continue to increase, in the past, in order to improve the safety of the car body, most people chose to increase the thickness of the car body sheet metal. This solution is simple and convenient, but it will increase the curb weight of the vehicle, thereby increasing the manufacturing cost and kinetic energy consumption of the vehicle. The emergence of hot stamping parts has solved this problem. Its characteristics are that the strength can be increased by 20%-40% without changing the thickness of the part material. Its disadvantages are high tensile strength of the material, easy distortion and rebound during the molding process, many mold processes, and high cost of part development.

[0003] At the same time, traditionally one mold forms one type of parts, and the whole vehicle has many stamping parts, which results in a wide variety of molds and greatly increases the mold investment cost.

[0004] However, when producing multiple types of molds, the overall production efficiency of parts is low, which is not conducive to improving the processing efficiency of parts.

[0005] The existing patent CN 217346888 U - A thermoforming die with synchronous trimming function does not clearly disclose the technical content for 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 thermoforming mold. Summary of the invention

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

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

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

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

[0011] A mold core structure is provided between the upper mold base and the lower mold base;

[0012] The core structure includes a plurality of core mechanisms;

[0013] Each of the mold core mechanisms comprises an upper mold core arranged on an upper mold base and a lower mold core arranged on a lower mold base; the upper mold core and the lower mold core are arranged opposite to each other;

[0014] Each core mechanism includes a limiting assembly; the limiting assembly includes an end positioning component and a side positioning component;

[0015] The end positioning component includes a guide pin arranged on the lower die seat;

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

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

[0018] The water cooling structure comprises a water inlet and a water outlet; a cooling water channel is arranged in the lower die base; and the water inlet is connected to the water outlet through the cooling water channel.

[0019] A parts hot forming system comprises a machine tool and a feeding system, wherein the machine tool is provided with a workbench, and the workbench is provided with a hot stamping die for multiple parts; the feeding system comprises a transfer device; the transfer device is used to transfer part blanks to be stamped.

[0020] The part hot forming system also includes a pre-positioning structure, which includes a positioning box; a placement groove for placing the part is provided in the positioning box.

[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 blank of the part to be stamped to a predetermined temperature, and place the blank of the part to be stamped in the core structure by a transfer device;

[0024] 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 toward the side close to the lower die structure; and the forming of the part to be stamped is achieved through the extrusion of the upper die structure and the lower die structure;

[0025] Step 4: After step 3 is completed, the driving part of the upper mold structure is started to move the upper mold structure away from the lower mold structure, so that the upper mold structure and the molded part are demolded;

[0026] Step 5: After completing step 4, use the transfer equipment to transfer the formed parts to the preset specified area according to the set motion trajectory. If new parts need to be stamped, repeat steps 2-4.

[0027] Before starting step 2, the water cooling structure needs to be turned on so that the water cooling structure can supply water to the lower mold base.

[0028] After the lower die seat is supplied with water, it is required to supply water to maintain pressure first; then after the parts are formed, the water outlet is opened to drain the water from inside and outside the lower die seat.

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

[0030] After stamping, the parts still need to be cut and formed.

[0031] The advantages of the present invention are:

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

[0033] The present invention can realize the forming operation of multiple identical or different parts by one hot stamping die through the design of multiple core mechanisms; it can reduce the stamping frequency cost, and simultaneously hot-press multiple parts in one step, greatly improving the efficiency and stability of hot stamping parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0035] Figure 1 It is a structural schematic diagram of the overall structure of the mold in the present invention;

[0036] Figure 2 It is a structural schematic diagram of the upper mold structure in the present invention;

[0037] Figure 3 The schematic diagram of the structure of the lower mold structure in the present invention is

[0038] Figure 4 It is a schematic diagram of the structure of the limiting component in the present invention.

[0039] Figure 5 It is a schematic diagram of the structure of the transporting device in the present invention.

[0040] Figure 6 It is a schematic diagram of the thermoforming die surface in the present invention.

[0041] The marks in the above figure are:

[0042] 1. Upper die structure, 2. Lower die structure, 3. Water inlet, 4. Water outlet, 5. Material setting rack, 6. Guide pins, 7. Part blank to be stamped, 8. Transfer device. DETAILED DESCRIPTION

[0043] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0044] A hot stamping die for multiple parts comprises a lower die structure 2 and an upper die structure 1; the lower die structure 2 comprises a lower die base 21, and the upper die structure 1 comprises an upper die base 11; a core structure is provided between the upper die base 11 and the lower die base 21; the core structure comprises a plurality of core mechanisms; the present invention can realize a hot stamping die to realize a plurality of same or different parts forming operations through the design of a plurality of core mechanisms; it can realize the reduction of stamping frequency cost, and at the same time, multiple parts are hot-pressed in one step, which greatly improves the efficiency and stability of hot stamping parts.

[0045] The multi-part hot stamping die disclosed by the present invention is mainly used for one-step forming of multiple parts.

[0046] Specifically, the hot stamping die disclosed in the present invention mainly includes a lower die structure 2 and an upper die structure 1; the lower die structure 2 includes a lower die base 21, and the upper die structure 1 includes an upper die base 11; a core structure is provided between the upper die base 11 and the lower die base 21; the core structure includes a plurality of core mechanisms; the lower die base 21 and the upper die base 11 of the present invention are the main base structure, and the core structure is mainly the molding area of ​​the part, and in the present invention, the core structure includes a plurality of core mechanisms; each core mechanism can realize at least one part molding operation.

[0047] In the present invention, each of the core mechanisms includes an upper core 12 arranged on an upper mold base 11 and a lower core 22 arranged on a lower mold base 21; the upper core 12 and the lower core 22 are arranged opposite to each other; by using the upper core 12 and the lower core 22 in coordination, the molding operation of the corresponding parts can be realized.

[0048] The specific structures of the upper mold core 12 and the lower mold core 22 can be manufactured according to the shape of the part to be molded.

[0049] Furthermore, in the present invention, each core mechanism includes a limiting assembly; the limiting assembly includes an end positioning component and a side positioning component; the limiting assembly disclosed in the present invention can ensure the stability of the arrangement of the part blank to be formed on the corresponding lower core 22, which is beneficial to ensure the stability of the position of the part blank to be formed during subsequent forming.

[0050] Specifically, in the present invention, the end positioning component includes a guide pin 6 arranged on the lower die base 21; the guide pin 6 is inserted into the positioning hole at the end of the part blank to be formed, so as to realize the end position limitation of the part blank to be formed, and the side positioning component includes a plurality of fixing racks 5, and the plurality of fixing racks 5 are distributed at the peripheral positions corresponding to the lower die core 22; the fixing rack 5 is generally an L-shaped bracket structure, which is mainly used to extrude and limit 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, it is required that one of the positioning holes at the end of the blank of the part to be formed is a circular hole and the other is a U-shaped hole or a waist-shaped hole.

[0052] At the same time, a water cooling structure is provided on the lower die base 21 in the present invention; the present invention can realize the cooling operation of the lower die base 21 through the setting of the water cooling structure, conveniently and quickly realize the heat dissipation of the parts after molding, and accelerate the processing efficiency of the parts.

[0053] Furthermore, in the present invention, the plurality of core mechanisms are centrally symmetrically distributed on the lower die base 21; based on the above design, the present invention can ensure that the overall force of the hot stamping die is balanced; in the present invention, the core mechanisms are evenly distributed: the centrally symmetrically distributed core mechanisms can ensure that the die is more evenly stressed during operation, thereby avoiding deformation or damage to the die caused by uneven force.

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

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

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

[0057] The overall structure is compact and space-saving: The central symmetrically distributed core structure can make more effective use of the mold space and make the mold structure more compact. This not only helps to reduce the size of the mold, but also saves costs.

[0058] Movement consistency and stability to avoid interference: Multiple core mechanisms are centrally symmetrically distributed to ensure the consistency and stability of each core mechanism during movement and avoid mutual interference.

[0059] Reduce part adjustment time: The symmetrical mold core structure is more convenient during installation and debugging, which can reduce adjustment time and improve production efficiency. At the same time, the symmetrical mold is easier to maintain during use.

[0060] Ensure product quality with uniform cooling: The central symmetrically distributed core structure can ensure that the cooling system design inside the mold is more reasonable, so that the cooling water is evenly distributed, thereby ensuring that the heat of the product is evenly taken away by the cooling water, reducing the temperature difference between the various parts of the cavity, and improving product quality.

[0061] Reduce the number of parts: The core structure with symmetrical distribution of the center can reduce the number of parts, because the mold with symmetrical structure can use more standard parts and common parts, thereby reducing manufacturing costs; improve mold strength and enhance rigidity: The mold with symmetrical structure can better consider the overall strength and rigidity of the mold during design, avoid mold deformation or damage caused by excessive local force, and increase the service life of the mold.

[0062] The multiple core mechanisms are centrally symmetrically distributed on the lower die base 21, which can bring many benefits such as balanced force, convenient processing and manufacturing, compact structure, movement consistency and stability, improved production efficiency, guaranteed product quality, reduced costs and improved mold strength.

[0063] Furthermore, the water cooling structure in the present invention includes a water inlet 3 and a water outlet 4; a cooling water channel is provided in the lower mold base 21; the water inlet 3 is connected to the water outlet 4 through the cooling water channel; when in use, cooling water enters the cooling water channel in the lower mold base 21 from the water inlet 3; in the cooling water channel, the cooling water will contact the inner wall of the lower mold base 21, and absorb the heat generated by the lower mold base 21 during operation; the temperature of the cooling water increases after absorbing the heat, and then flows out from the water outlet 4.

[0064] A parts hot forming system includes a machine tool and a feeding system, wherein the machine tool is provided with a workbench, and the workbench is provided with the hot stamping die for multiple parts; the feeding system includes a transfer device 8; the transfer device 8 is used to transfer the part blanks 7 to be stamped; in the present invention, the machine tool is the core equipment of the entire parts hot forming system, and it 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 and down movement of the mold to achieve stamping 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 worktable needs to be strong and rigid enough to withstand the weight of the die and part blanks as well as the impact forces during the stamping process.

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

[0070] The transfer device 8 can be of various types, such as a robot, a conveyor belt, a hopper, etc.

[0071] Take the robot arm as an example. It can accurately grab the part blank and place it at the specified position of the mold according to the preset path.

[0072] The robot's motion accuracy and flexibility are very important to ensure accurate placement of the part blank.

[0073] The conveyor belt is suitable for large-scale continuous production. It can continuously transport the blank to the vicinity of the machine tool, and then send the blank into the mold through other auxiliary devices.

[0074] System workflow

[0075] Blank preparation stage

[0076] First, the part blank 7 to be punched needs to be prepared.

[0077] These blanks are usually metal sheets 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 make it more plastic and facilitate subsequent stamping.

[0079] Feeding stage

[0080] The feeding system starts to work. The transfer device 8 (such as a robot) grabs the heated blank from the blank storage position according to a 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 die on the workbench to move downward.

[0083] The upper die and the lower die cooperate with each other during the stamping process to exert tremendous pressure on the blank.

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

[0085] Finished product removal stage: After the stamping is completed, the upper die will move upward and leave the lower die.

[0086] At this time, the transfer device 8 (such as a robot) in the feeding system plays a role again, taking the formed parts out of the mold and placing them in the finished product storage area or the subsequent processing step location.

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

[0088] This part hot forming system achieves efficient and precise hot forming processing of parts through the coordinated work of machine tools and feeding systems.

[0089] Furthermore, in the present invention, the part hot forming system also includes a pre-positioning structure, which includes a positioning box; the positioning box is provided with a placement groove for placing the part; the positioning box is the main carrier of the pre-positioning structure, and it is usually a box structure with certain strength and rigidity.

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

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

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

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

[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, and can adapt to harsh working environments.

[0095] Function: The placement slot is a special area inside the positioning box for placing part blanks.

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

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

[0098] The bottom and sides of the placement groove are usually designed with positioning protrusions or positioning grooves. These positioning features cooperate with corresponding features on the blank to achieve precise positioning.

[0099] For example, for some blanks with positioning holes, positioning pins are designed at the corresponding positions of the placement grooves. When the blank is placed in the placement grooves, the positioning pins are inserted into the positioning holes of the blanks, thereby fixing the position of the blanks.

[0100] At the same time, the surface of the placement groove will undergo certain surface treatments, such as adding anti-slip textures or coatings, to increase the friction between the groove and the blank and prevent the blank from sliding.

[0101] The workflow of the pre-positioning structure in the system

[0102] Blank placement stage

[0103] After the feeding system transfers the blank 7 of the part to be stamped to the pre-positioning position near the machine tool worktable, the transfer device 8 (such as a robot) places the blank into the placement slot of the positioning box.

[0104] During this process, the transfer device 8 needs to accurately place the blank into the placement slot according to the shape and position of the placement slot, and ensure that the blank matches the positioning features in the placement slot. For example, the gripping device of the manipulator will adjust the gripping angle and force according to the shape of the blank and the position of the placement slot, and smoothly place the blank into the placement slot.

[0105] Pre-positioning stage;

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

[0107] The positioning protrusion or positioning groove in the placement groove cooperates with the blank to perform preliminary positioning on 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 aligned with the symmetry axis of the die, reducing the deviation of the blank during the stamping process and improving the forming accuracy.

[0110] During the blank transfer to the die stage, after pre-positioning is completed, the feeding system starts again to transfer the pre-positioned blank to the hot stamping die on the machine tool workbench.

[0111] During the transfer process, since the blank has been pre-positioned, it can maintain a relatively stable position and posture, allowing it to be accurately placed on the lower die part of the hot stamping die, and then proceed to the subsequent stamping process.

[0112] By adding a 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: heating the blank part 7 to be stamped to a predetermined temperature, and placing the blank part 7 to be stamped in the core structure by a transfer device 8;

[0116] Step 3: After step 2 is completed, the driving part of the upper die structure 1 is started; the upper die structure 1 is controlled to move toward the side close to the lower die structure 2; and the forming of the part to be stamped is achieved through the extrusion of the upper die structure 1 and the lower die structure 2;

[0117] Step 4: After step 3 is completed, the driving part of the upper mold structure 1 is started to move the upper mold structure 1 away from the lower mold structure 2, so that the upper mold structure 1 and the molded part are demoulded;

[0118] Step 5: After step 4 is completed, the formed parts are transferred to a preset specified area by the transfer device 8 according to the set motion trajectory. If a new part needs to be stamped, steps 2-4 can be repeated.

[0119] The present invention can realize the forming process of parts through the above-mentioned part forming method.

[0120] specific:

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

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

[0123] This process needs to ensure the matching accuracy between the various components. For example, the matching clearance between the upper mold and the lower mold must meet the requirements, and the geometric accuracy such as the coaxiality of the mold core and the mold cavity must also meet the standards. During assembly, professional assembly tools and equipment are usually used, such as precision bolt tightening equipment, positioning fixtures, etc., to ensure assembly quality.

[0124] Calibration;

[0125] After assembly, the hot stamping die must be calibrated.

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

[0127] The calibration contents include the dimensional accuracy and position accuracy of the mold.

[0128] For example, a three-coordinate measuring machine can be used to measure the key dimensions of the mold (such as cavity size, locating pin hole position, etc.), compare them with the design dimensions, and make adjustments if there are deviations.

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

[0130] Step 2: heating the blank part 7 to be stamped to a predetermined temperature, and placing the blank part 7 to be stamped in the core structure by a transfer device 8;

[0131] Heating the blank: The blank 7 of the part to be stamped 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 stamping process.

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

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

[0134] The heated blank is transported by a transport device 8 (such as a robot) of the feeding system. The transport device 8 needs to select a suitable grasping method according to the temperature and shape characteristics of the heated blank.

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

[0136] The blank is then positioned accurately within the core structure.

[0137] The core structure is the part of the mold used to form 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, the driving part of the upper die structure 1 is started; the upper die structure 1 is controlled to move toward the side close to the lower die structure 2; and the forming of the part to be stamped is achieved through the extrusion of the upper die structure 1 and the lower die structure 2;

[0139] Starting the driving part of the upper mold structure 1;

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

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

[0142] Different driving modes have different characteristics. For example, hydraulic drive has a larger driving force and is suitable for stamping large molds and thick blanks; electric servo drive has higher control accuracy and response speed and can realize complex stamping processes.

[0143] Extrusion molding 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 core structure.

[0145] Under the action of high temperature and high pressure, the blank undergoes plastic deformation, gradually filling the mold cavity to form the desired part shape.

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

[0147] Step 4: After step 3 is completed, the driving part of the upper mold structure 1 is started to move the upper mold structure 1 away from the lower mold structure 2, so that the upper mold structure 1 and the molded part are demoulded;

[0148] Start the driving part of the upper mold structure 1 to demould;

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

[0150] Demolding is an important step in the stamping process. It is necessary to ensure that the formed parts can be smoothly removed from the mold without damage or deformation.

[0151] During the demoulding process, the upward movement speed of the upper mold should be moderate. Too fast may cause the parts to collide and be damaged in the mold, while too slow will affect production efficiency.

[0152] Step 5: After step 4 is completed, the formed parts are transported to the preset specified area by the transport device 8 according to the set motion trajectory. If new parts need to be stamped, repeat steps 2-4.

[0153] The molded parts are transferred and the demoulded parts are transferred through the transfer device 8 of the feeding system.

[0154] The transfer device 8 transfers the parts to the finished product storage area or the subsequent processing step according to the preset motion trajectory. The design of the motion trajectory should take into account the spatial layout of the production site and the rationality of the production process.

[0155] For example, in an automated production line, the movement trajectory of the transfer device 8 may match the position of subsequent testing equipment, heat treatment equipment, etc., to achieve continuous processing of parts.

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

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

[0158] In actual production, high-efficiency and high-quality mass production of parts can be achieved through precise control procedures and automated equipment.

[0159] The molding method disclosed by the invention is suitable for producing parts of various materials and shapes.

[0160] By adjusting the heating temperature, mold shape and stamping parameters, it is possible to produce parts of different materials (such as various steels, aluminum alloys, etc.) and different levels of complexity. For example, in automobile manufacturing, both simple covering parts and complex reinforcements and structural parts can be produced.

[0161] Furthermore, before starting step 2 described in the present invention, it is necessary to turn on the water cooling structure so that the water cooling structure can supply water to the lower die base 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 parts to the lower die core 22 after heating; before starting step 2 (heating the blank 7 of the part to be stamped to a predetermined temperature, and placing the blank 7 of the part to be stamped in the die core structure through the transfer device 8), the water cooling structure needs to be turned on first.

[0162] This is because the lower die base 21 will be exposed to a large amount of heat during the subsequent stamping process, especially when the high-temperature blank is placed in the mold and stamping begins, the temperature of the lower die base 21 will rise rapidly; turning on the water cooling structure in advance can allow the cooling water to pre-fill the cooling water channel to prepare for effective cooling.

[0163] Furthermore, in the present invention, 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 discharge the water from inside and outside the lower die seat 21; in the present invention, water supply and pressure maintenance requires that 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 functions of pressure maintenance are as follows: First, it plays a good protective role and effectively protects the cooling of the lower die base 21 and / or the lower die core 22. In addition, it can also prevent pressure fluctuations or cooling water leakage in the cooling water channel due to deformation of the blank or vibration of the mold during the stamping process.

[0166] At the same time, stable water pressure can ensure the uniformity and continuity of the cooling effect. Secondly, maintaining pressure can also enhance the sealing 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 seals (such as sealing rings) fit better, reduce the leakage of cooling water, and avoid the cooling water from having adverse effects on the mold or other parts of the machine tool.

[0168] Drainage after molding: After the parts are molded (after step 3 is completed), the water outlet 4 is opened to drain the water from inside and outside the lower mold base 21.

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

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

[0171] When the parts are formed, the temperature control requirements of the stamping process are 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 can not only take away the heat in the lower die base 21 and reduce the temperature of the lower die base 21, but also prevent the cooling water from staying in the lower die base 21 for a long time and affecting the service life of the mold; in addition, the continuous flow of cooling water can quickly realize the cooling operation of the formed parts on the lower die core 22.

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

[0173] Furthermore, in the present invention, the parts after stamping need to be cut and formed; the parts after stamping need to be cut and formed; the cutting here is to cut the edge materials or expected cutting of the two pieces after forming, and the other function is to cut the two parts produced by the above-mentioned lower mold core 22, so as to separate the two different parts.

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

[0175] specific:

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

[0177] The technical solution adopted by the present invention is: a multi-piece one-step hot forming process, including an upper mold structure 1 and a lower mold structure 2, the upper mold structure 1 includes an upper mold base 11, and an upper mold core 12 is provided on the upper mold base 11.

[0178] The lower mold structure 2 includes a lower mold base 21 , and a lower mold core 22 is disposed on the lower mold base 21 .

[0179] The hot stamping die disclosed in the present invention can reduce the stamping frequency cost, and simultaneously hot-press multiple parts in one step, greatly improving the efficiency and stability of hot stamping parts.

[0180] A method for using a stamping die, the method comprising the following steps:

[0181] Step 1: Assemble the hot stamping die and calibrate each component;

[0182] Step 2: heating the blank part 7 to be stamped to a predetermined temperature, and placing the blank part in the lower die core 22 of the lower die structure 2 by means of a transfer device 8;

[0183] Step 3: After step 2 is completed, the driving part of the upper die seat 11 is started; the upper die structure 1 is controlled to move toward 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 force of the pressure source is driven to move, so as to realize the forming of the part to be stamped;

[0184] Step 4: After step 3 is completed, the driving part of the upper mold structure 1 is started to move the upper mold structure 1 away from the lower mold structure 2; under the action of the reset mechanism and the force release of the pressure source, the upper mold structure 1 and the molded part are demoulded;

[0185] Step 5: After step 4 is completed, the formed parts are transferred to a preset specified area by the transfer device 8 according to the set motion trajectory. If other parts need to be stamped, steps 2-4 can be repeated.

[0186] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A hot stamping die for multiple parts, characterized in that: It includes a lower mold structure and an upper mold structure; The lower die structure includes a lower die seat, and the upper die structure includes an upper die seat; A mold core structure is provided between the upper mold base and the lower mold base; The core structure includes a plurality of core mechanisms; Each of the mold core mechanisms comprises an upper mold core arranged on an upper mold base and a lower mold core arranged on a lower mold base; the upper mold core and the lower mold core are arranged opposite to each other; Each core mechanism includes a limiting assembly; the limiting assembly includes an end positioning component and a side positioning component; The end positioning component includes a guide pin arranged on the lower die seat; The side positioning component includes a plurality of material fixing racks, and the plurality of material fixing racks are distributed at the peripheral positions of the corresponding lower mold core; a water cooling structure is provided on the lower mold base.

2. A hot stamping die for multiple parts according to claim 1, characterized in that: The plurality of core mechanisms are centrally symmetrically distributed on the lower die base.

3. A hot stamping die for multiple parts according to claim 1, characterized in that: The water cooling structure comprises a water inlet and a water outlet; a cooling water channel is arranged in the lower die base; and the water inlet is connected to the water outlet through the cooling water channel.

4. A part hot forming system, characterized in that: It comprises a machine tool and a feeding system, wherein the machine tool is provided with a workbench, and the workbench is provided with a hot stamping die for multiple parts as claimed in any one of claims 1 to 3; the feeding system comprises a transfer device; and the transfer device is used to transfer blanks of parts to be stamped.

5. A part hot forming system according to claim 4, characterized in that: The part hot forming system also includes a pre-positioning structure, which includes a positioning box; a placement groove for placing the part is provided in the positioning box.

6. A part forming method based on the part hot forming system according to any one of claims 4 to 5, characterized in that: The molding method comprises the following steps: Step 1: Assemble the hot stamping die and calibrate the hot stamping die; Step 2: Heat the blank of the part to be stamped to a predetermined temperature, and place the blank of the part to be stamped in the core structure by a transfer device; 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 toward the side close to the lower die structure; and the forming of the part to be stamped is achieved through the extrusion of the upper die structure and the lower die structure; Step 4: After step 3 is completed, the driving part of the upper mold structure is started to move the upper mold structure away from the lower mold structure, so that the upper mold structure and the molded part are demoulded; Step 5: After completing step 4, use the transfer equipment to transfer the formed parts to the preset specified area according to the set motion trajectory. If new parts need to be stamped, repeat steps 2-4.

7. The part forming method of the part hot forming system according to claim 6, characterized in that: Before starting step 2, the water cooling structure needs to be turned on so that the water cooling structure can supply water to the lower mold base.

8. The part forming method of the part hot forming system according to claim 7, characterized in that: After the lower die seat is supplied with water, it is required to supply water to maintain pressure first; then after the parts are formed, the water outlet is opened to drain the water from inside and outside the lower die seat.

9. The part forming method of the part hot forming system according to claim 6, characterized in that: At least one mold core mechanism can realize the synchronous stamping and forming of two different parts; by controlling the corresponding mold core mechanism, one lower mold core can form two different parts.

10. The part forming method of the part hot forming system according to claim 9, characterized in that: After stamping, the parts still need to be cut and formed.

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