A thermoforming device and system

Abstract

The present invention discloses a thermoforming device and system, which is applied to the field of thermoforming technology. The thermoforming device includes: an equipment frame; an upper slider and a lower slider; a transmission assembly mounted on the equipment frame, the transmission assembly including a power component, a power conversion component connected to the power component, a torque transfer mechanism connected to the power conversion component, and a feedback encoder for obtaining the rotation angle of the torque transfer mechanism, wherein the power conversion component and the torque transfer mechanism are both gear-shaped; the torque transfer mechanism is used to drive the upper slider to move toward or away from the lower slider; a controller is connected to the power component and the feedback encoder, and the controller is used to control the movement of the power component based on the rotation angle of the torque transfer mechanism obtained by the feedback encoder. The thermoforming device provided by the present invention can better feedback the moving position of the upper slider, improve the mold closing position accuracy between the upper mold and the lower mold, and further improve the processing accuracy of the workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of thermoforming, and in particular to a thermoforming device and system. Background Art

[0002] With the automotive industry's stricter energy consumption controls and the rapid growth of new energy vehicles, the demand for automotive safety and lightweighting is becoming increasingly urgent. Hot-formed steel, due to its ultra-high strength and easy processing, is widely used in automotive structural components. The primary production process for hot-formed steel involves heating the steel plate to a high temperature, achieving full austenitization, followed by rapid cooling. This significantly increases the overall strength of the steel, achieving a yield strength exceeding 1000 MPa. Simultaneously, the demand for hot and cold-separated components is also increasing significantly, particularly for battery protection, where the same component requires both high strength and guaranteed weldability.

[0003] The stamping forming equipment in the related technology generally adopts a stamping machine structure to perform contour mold pressing on the hot-formed parts and uses water heat transfer for quenching operations. This method requires equipment with a relatively large tonnage, correspondingly high energy consumption, high manufacturing cost, and large floor space. For some special working conditions that require frequent precise positioning at different positions, this type of equipment basically cannot meet the requirements. The main transmission power adopts a hydraulic mechanism, and the use of hydraulic oil will also cause certain adverse factors to the surrounding environment; alternatively, a hot forming machine is used to achieve rapid disassembly and assembly of the upper and lower pressure plates, which is convenient for regular maintenance. However, the traditional hydraulic press model is still used, which has a large tonnage, high cost, long maintenance cost and delivery time, and high investment cost.

[0004] Therefore, how to simplify the production process of thermoforming equipment and reduce costs is a technical problem that those skilled in the art currently need to solve. Summary of the Invention

[0005] The purpose of the present invention is to provide a thermoforming device and system that can effectively reduce the cycle of thermoforming processing of workpieces and improve efficiency and processing accuracy.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A thermoforming device comprising:

[0008] Equipment framework;

[0009] An upper slider and a lower slider are both installed on the equipment frame, the upper slider is used to drive the upper mold to move, and the lower slider is used to support the lower mold;

[0010] a transmission assembly mounted on the device frame, comprising a power component, a power conversion component connected to the power component, a torque transfer mechanism connected to the power conversion component, and a feedback encoder for obtaining a rotation angle of the torque transfer mechanism; the power conversion component and the torque transfer mechanism are both gear-shaped; the torque transfer mechanism is used to drive the upper slider to move toward or away from the lower slider;

[0011] The power component and the feedback encoder are both connected to the controller, and the controller is used to control the action of the power component according to the rotation angle of the torque transfer mechanism obtained by the feedback encoder.

[0012] On the other hand, the transmission assembly also includes a brake transmission component for transmitting the power of the power component to the power conversion component. The brake transmission component is connected between the power component and the power conversion component, and the brake transmission component is connected to the controller. The controller is also used to control the brake transmission component to stop after the upper slider moves to the target position.

[0013] On the other hand, the transmission assembly also includes a rotating connecting component, one end of the rotating connecting component is hinged to the torque transfer mechanism, and the other end is hinged to the upper slider, and the torque transfer mechanism pulls the upper slider up and down through the rotating connecting component; and the number of the power conversion component, the torque transfer mechanism and the rotating connecting component is at least two, and they are symmetrically distributed along the left and right sides of the brake transmission component, and at least one rotating connecting component is connected to the left and right sides of the upper slider.

[0014] On the other hand, a work surface is provided on the upper portion of the lower slider, and a plurality of positioning grooves for positioning the lower mold and a plurality of fixing grooves for fixing the lower mold are provided on the work surface, and the positioning grooves and the fixing grooves are arranged in an array.

[0015] On the other hand, it also includes a thermoforming mold, the thermoforming mold comprising:

[0016] The upper mold and the lower mold form a cavity for placing a workpiece therein, the upper mold and the lower mold both have cavities therein, and hollow portions are provided at target positions on one side of the upper mold and the lower mold near the cavity, the hollow portions being in communication with the cavity so that a medium in the cavity can be sprayed onto the workpiece through the hollow portions;

[0017] a plurality of ejectors, wherein the ejectors are installed in the cavities of the upper mold and / or the lower mold;

[0018] A plurality of medium pipelines are arranged in the cavity, the medium pipelines are used to provide medium to the spray body, and the pressure of the medium pipelines is adjustable.

[0019] On the other hand, it also includes:

[0020] The upper mold water supply installation adapter is used to connect the external pipeline. The upper mold water supply installation adapter is installed on the equipment frame, and the upper mold is provided with a quick-release joint that is detachably connected to the upper mold water supply installation adapter. The quick-release joint is connected to the media pipeline.

[0021] On the other hand, it also includes:

[0022] An exhaust gas collecting component, used for collecting exhaust gas during the quenching process, wherein the exhaust gas collecting component is installed on the top of the equipment frame;

[0023] A water circulation system for collecting media and recycling them; the water circulation system includes: a circulating water collection tank for storing cooling water recovered from the thermoforming mold and performing primary filtration on the cooling water; a return water component for extracting cooling water from the thermoforming mold and delivering it to the circulating water collection tank, the return water component being connected to the circulating water collection tank; a water storage tank component for storing the once filtered circulating water in the circulating water collection tank; a water supply component for obtaining the once filtered circulating water in the circulating water collection tank and delivering it to the water storage tank component, the water storage tank component being connected to a water supply channel for delivering cooling water to the thermoforming mold; a secondary filter and / or a tertiary filter installed on the water supply channel for performing secondary and / or tertiary filtration on the cooling water in the water supply channel; a high-pressure water pump installed on the water supply pipe for adjusting the water supply pressure of the water supply channel, and the adjustable range is 0-3Mpa.

[0024] On the other hand, it also includes a guide mechanism installed in the equipment frame, and the upper slider is slidably connected to the guide mechanism; the lower slider is slidably installed in the equipment frame, and the lower slider can slide from the inside of the equipment frame to the outside to replace the mold.

[0025] The present invention also provides a thermoforming system, comprising any one of the thermoforming devices described above.

[0026] On the other hand, it also includes a tunnel furnace, which is provided with a workpiece placement position, a heating area, an insulation area and an in-furnace grabbing area in sequence from the loading end to the lower end; it also includes a workstation loading device and an automatic loading robot, and the automatic loading robot is used to grab the workpiece in the workstation loading device and place it in the workpiece placement position; it also includes a truss manipulator and a medium supply and recovery device, and the hot forming equipment is located between the truss manipulator and the medium supply and recovery device, and the truss manipulator is used to move the workpiece in the in-furnace grabbing area to the hot forming equipment.

[0027] On the other hand, the truss manipulator includes a first supporting column, a second supporting column, a transverse support, a grasping mechanism and a mechanism motion component, the first supporting column and the second supporting column are respectively placed at the two ends of the transverse support, and the grasping mechanism is suspended at the bottom of the mechanism motion component through a fourth axis connection mechanism; the grasping mechanism includes a grasping frame, a grasping cylinder, a grasping transmission rod, a transmission rod fixing sleeve and a transmission lever, the grasping cylinder is installed on the grasping frame, and a cylinder protective cover is also provided on the outside of the grasping cylinder. The grabbing transmission rod is slidably connected to the transmission rod fixing sleeve, one end of the grabbing transmission rod is connected to the grabbing cylinder, and the other end is connected to the transmission lever; and a first hook is provided at the bottom of the grabbing frame, and a second hook is provided at the bottom of the transmission lever. When the workpiece moves to the grabbing area in the tunnel furnace, one end of the workpiece moves to the first hook, and the grabbing cylinder drives the grabbing transmission rod to translate to drive the transmission lever to swing, and the transmission lever drives the second hook to swing to clamp the other end of the workpiece.

[0028] On the other hand, the mechanism motion assembly includes a mechanism motion support body and a fourth-axis servo motor, a motor protective cover, a harmonic reducer, a driving component and a heat insulation plate installed on the mechanism motion support body. The motor protective cover is arranged on the fourth-axis servo motor, the harmonic reducer is connected between the fourth-axis servo motor and the driving component, the heat insulation plate is installed at one end of the driving component close to the grasping mechanism, the grasping mechanism is installed on the driving component and can follow the movement of the driving component; a cooling component is also installed on the mechanism motion support body, and the cooling component is used to introduce cold air into the mechanism motion support body to cool the fourth-axis servo motor.

[0029] The thermoforming equipment provided by the present invention includes: an equipment frame; an upper slider and a lower slider, both of which are installed on the equipment frame, the upper slider is used to drive the upper mold to move, and the lower slider is used to support the lower mold; a transmission assembly, installed on the equipment frame, the transmission assembly includes a power component, a power conversion component connected to the power component, a torque transfer mechanism connected to the power conversion component, and a feedback encoder for obtaining the rotation angle of the torque transfer mechanism, the power conversion component and the torque transfer mechanism are both gear-shaped; the torque transfer mechanism is used to drive the upper slider to move toward or away from the lower slider; a controller, the power component and the feedback encoder are both connected to the controller, and the controller is used to control the action of the power component according to the rotation angle of the torque transfer mechanism obtained by the feedback encoder. The thermoforming equipment provided by the present invention utilizes the gear transmission between the power component, the power conversion component and the torque transfer mechanism to improve the position movement accuracy of the upper slider, thereby effectively improving the mold closing position accuracy between the upper mold and the lower mold, and further improving the processing accuracy of the workpiece; further, by adding the feedback encoder, the feedback encoder is used to obtain the rotation angle of the torque transfer mechanism and feed it back to the controller, so that the moving position of the block can be better fed back, further improving the mold closing position accuracy between the upper mold and the lower mold, and further improving the processing accuracy of the workpiece.

[0030] In one embodiment, it further includes a guide mechanism installed in the equipment frame, and the upper slider is slidably connected to the guide mechanism; the lower slider is slidably installed in the equipment frame, and the lower slider can slide from the inside of the equipment frame to the outside to replace the mold. In the above arrangement, the guide mechanism can be a guide rail, such as a steel guide rail. Through the arrangement of the guide mechanism, the smoothness of the upper slider during the lifting process can be improved, thereby further improving the moving position accuracy of the upper slider, thereby improving the position accuracy of the upper mold; further, the lower slider can slide from the inside of the equipment frame to the outside, that is, the lower slider is a movable workbench, which can be moved horizontally out of the equipment frame to the left and right to replace the mold, thereby increasing the convenience and timeliness of replacing the mold.

[0031] The thermoforming system provided by the present invention is provided with the above-mentioned thermoforming equipment. Since the thermoforming equipment has the above-mentioned technical effects, the thermoforming system provided with the thermoforming equipment should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. 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 paying any creative work.

[0033] Figure 1 This is a schematic structural diagram of a specific embodiment of the thermoforming equipment provided by the present invention;

[0034] Figure 2 for Figure 1 The transmission control mechanism diagram of the thermoforming equipment shown;

[0035] Figure 3 for Figure 1 The structural diagram of the water circulation system in the thermoforming equipment shown;

[0036] Figure 4 for Figure 1 Schematic diagram of the structure of the thermoforming mold in the thermoforming equipment shown;

[0037] Figure 5 for Figure 4 A schematic structural diagram of the support contact portion and the hollow portion in the upper mold and the lower mold shown;

[0038] Figure 6 for Figure 4 Cross-sectional view of the injection body and the medium pipeline;

[0039] Figure 7 for Figure 4 A schematic diagram of the structure of the thermoforming mold when the upper mold and the lower mold are closed;

[0040] Figure 8 This is one of the implementation methods of hot and cold partitions in the thermoforming mold provided by the present invention;

[0041] Figure 9 This is another way to realize the hot and cold partitions in the thermoforming mold provided by the present invention;

[0042] Figure 10 A schematic diagram of the process of a specific embodiment of the thermoforming system provided by the present invention;

[0043] Figure 11 A schematic structural diagram of a specific embodiment of the thermoforming system provided by the present invention;

[0044] Figure 12 for Figure 10 A cross-sectional view of a truss robot in the thermoforming system shown;

[0045] Figure 13 for Figure 12 The structural diagram of the grasping mechanism in the truss manipulator shown;

[0046] Figure 14 for Figure 12 The schematic diagram of the structure of the motion components of the mechanism in the truss manipulator is shown.

[0047] Reference numerals:

[0048] Thermoforming mold 1; thermoforming equipment 2; thermoforming system 3; workpiece 4;

[0049] Upper mold 11; lower mold 12; hollow portion 13; ejector 14; medium pipeline 15; mold upper connecting plate 16; mold lower connecting plate 17; upper connecting member 18; lower connecting member 19; support contact portion 110;

[0050] Equipment frame 21; upper slider 22; lower slider 23; transmission assembly 24; power component 24-1; power conversion component 24-2; torque transfer mechanism 24-3; feedback encoder 24-4; brake transmission component 24-5; rotation connection component 24-6; balancing cylinder 24-7; upper mold water supply installation adapter 25; upper water channel interface 26; lower water channel interface 27; exhaust gas collection component 28; water circulation system 29; circulating water collection box 29-1; return water component 29-2; water storage tank component 29-3; water supply component 29-4; secondary filter 29-5; tertiary filter 29-6; high-pressure water pump 29-7; water supply pipe 29-8; guide mechanism 210; quenching equipment protective cover 211; mold installation position 212;

[0051] Workpiece placement area 31-1; heating area 31-2; holding area 31-3; grabbing area in the furnace 31-4; workstation loading equipment 32; automatic loading robot 33; truss manipulator 34; first support column 34-1; second support column 34-2; transverse support member 34-3; grabbing mechanism 34-4; grabbing frame 34-4-1; grabbing cylinder 34-4-2; grabbing transmission rod 34-4-3; transmission rod fixing sleeve 34-4-4; transmission dial Rod 34-4-5; cylinder protective cover 34-4-6; first hook 34-4-7; second hook 34-4-8; floating connector 34-4-9; mechanism motion assembly 34-5; fourth-axis servo motor 34-5-1; motor protective cover 34-5-2; harmonic reducer 34-5-3; drive component 34-5-4; heat shield 34-5-5; cooling component 34-5-6; bearing 34-5-7; medium supply recovery device 35. DETAILED DESCRIPTION

[0052] The core of the present invention is to provide a thermoforming device and system, which can improve the clamping position accuracy of the upper mold and the lower mold, thereby improving the processing accuracy of the workpiece.

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] Hot forming technology refers to the process of heating steel plates at high temperatures to fully austenitize their structure, and then rapidly cooling them, thereby comprehensively improving the strength of the steel plates and increasing the yield strength of the steel to over 1000 MPa. For example, using this material in automobile body parts can reduce the weight of the vehicle body while increasing the strength of the vehicle body and achieving higher impact safety. Therefore, hot forming technology has been widely used in the automotive industry.

[0055] In the thermoforming process of related technologies, press quenching is the key link to achieve the final performance, and the mold is the key factor in controlling the cooling process. The initial design of the indirect thermoforming mold is to calculate the energy of the hot workpiece per unit time through the thermal conductivity parameters of the water channel and the material, and to achieve the defined strength of the workpiece by defining the cooling rate. However, press quenching has the following difficulties: First, it is difficult to precisely control the placement of the heated steel workpiece into the mold cavity, which increases the difficulty of process control. Second, the shape of the heated steel workpiece is usually not flat. If there are structures such as corners, the cooling rate will be inconsistent, resulting in uneven internal hardness of the workpiece and uncontrollable strength. Third, the water channel in the mold does not directly contact the steel workpiece, which results in slow cooling and low cooling efficiency. Fourth, the thermoforming mold for thermoforming is expensive, which is difficult for ordinary companies to afford, and has greatly limited the promotion of indirect thermoforming.

[0056] In this embodiment, please refer to Figures 1 to 3 , the thermoforming equipment 2 includes:

[0057] Equipment frame 21;

[0058] The upper slider 22 and the lower slider 23 are both installed on the equipment frame 21. The upper slider 22 is used to drive the upper mold 11 to move, and the lower slider 23 is used to support the lower mold 12.

[0059] The transmission assembly 24 is mounted on the equipment frame 21 and includes a power component 24-1, a power conversion component 24-2 connected to the power component 24-1, a torque transfer mechanism 24-3 connected to the power conversion component 24-2, and a feedback encoder 24-4 for obtaining the rotation angle of the torque transfer mechanism 24-3. The power conversion component 24-2 and the torque transfer mechanism 24-3 are both gear-shaped. The torque transfer mechanism 24-3 is used to drive the upper slider 22 to move toward or away from the lower slider 23.

[0060] The controller, the power component 24 - 1 and the feedback encoder 24 - 4 are all connected to the controller, and the controller is used to control the action of the power component 24 - 1 according to the rotation angle of the torque transfer mechanism 24 - 3 obtained by the feedback encoder 24 - 4 .

[0061] Specifically, the rotation of the torque transfer mechanism 24-3 drives the upper slider 22 to move up and down, realizing the opening and closing of the mold of the entire equipment; the power component 24-1 provides power support for the downward pressure, positioning and lifting of the upper slider 22. The power component 24-1 can adjust the equipment torque according to the actual needs of the equipment, and then control the pressure of the equipment. Its tonnage can be controlled between 1-600T and can be adjusted; the power component 24-1 can cooperate with the torque transfer mechanism 24-3 and provide signal feedback to form a closed-loop control of the transmission position, so as to achieve control of position accuracy, and its repeated positioning accuracy can reach ±0.03mm; by replacing power conversion components 24-2 and torque transfer mechanisms 24-3 of different specifications, the transmission ratio between the power conversion component 24-2 and the torque transfer mechanism 24-3 can be 1 to 100 to meet different usage requirements.

[0062] The thermoforming equipment 2 utilizes the gear transmission between the power component 24-1, the power conversion component 24-2 and the torque transfer mechanism 24-3 to improve the position movement accuracy of the upper slider 22, thereby effectively improving the mold closing position accuracy between the upper mold 11 and the lower mold 12, and further improving the processing accuracy of the workpiece 4; further, by adding a feedback encoder 24-4, the feedback encoder 24-4 is used to obtain the rotation angle of the torque transfer mechanism 24-3, and the feedback is fed back to the controller, so that the moving position of the upper slider 22 can be better fed back, further improving the mold closing position accuracy between the upper mold 11 and the lower mold 12, and further improving the processing accuracy of the workpiece 4.

[0063] In some embodiments, the transmission assembly 24 also includes a brake transmission component 24-5, which is used to transmit the power of the power component 24-1 to the power conversion component 24-2. The brake transmission component 24-5 is connected between the power component 24-1 and the power conversion component 24-2, and the brake transmission component 24-5 is connected to the controller. The controller is also used to control the brake transmission component 24-5 to stop after the upper slider 22 moves to the target position; the brake transmission component 24-5 is also a transmission gear, and the brake transmission component 24-5 is connected to the power component 24-1 and engages with the power conversion component 24-2 to transmit the action of the power component 24-1 to the power conversion component 24-2; the brake transmission component 24-5 can protect the power component 24-1, and can also improve the positioning accuracy of the equipment and support the positioning stability of the entire equipment.

[0064] In some embodiments, the transmission assembly 24 also includes a rotating connecting component 24-6, one end of the rotating connecting component 24-6 is hinged to the torque transfer mechanism 24-3, and the other end is hinged to the upper slider 22. The torque transfer mechanism 24-3 pulls the upper slider 22 up and down through the rotating connecting component 24-6 to ensure the smooth lifting and lowering of the upper slider 22; the transmission assembly 24 constitutes the power source of the equipment and the position closed-loop control mechanical part of the entire equipment.

[0065] In some embodiments, the number of the power conversion component 24-2, the torque transfer mechanism 24-3 and the rotating connection component 24-6 is at least two, and they are symmetrically distributed along the left and right sides of the brake transmission component 24-5, and at least one rotating connection component 24-6 is distributed and connected to the left and right sides of the upper slider 22; with this arrangement, the two sides of the upper slider 22 move synchronously, so that its positioning accuracy is better.

[0066] In some embodiments, the transmission assembly 24 also includes a balancing cylinder 24-7, which is used to balance the physical weight of the upper slider 22 and the upper mold 11, reducing the torque and power of the power component 24-1, thereby saving energy. The device can achieve a maximum mold opening and closing speed of 2 m / s, and its opening and closing speed can also be adjusted to 0.1-2 m / s. The stroke of the upper mold 11 can be 0-4 m, and the mold opening distance can be adjusted to a range of 0-3 m. Due to the device's high control precision, the work surface size of the lower module can be as large as 3500 mm by 5000 mm, meeting the processing requirements of small-tonnage and large-sized workpieces 4.

[0067] In some embodiments, a work surface is provided on the upper portion of the lower slider 23, and a plurality of positioning grooves for positioning the lower mold 12 and a plurality of fixing grooves for fixing the lower mold 12 are provided on the work surface, and the positioning grooves and the fixing grooves are arranged in an array; specifically, the work surface of the lower slider 23 has a cross-shaped positioning groove, which is used to replace the mold and position the mold for installation, that is, when the same model of thermoforming mold 1 is used, a positioning block can be installed in the positioning groove, without repeated positioning, thereby improving the mold installation efficiency; the fixing groove is a T-slot, which can be connected and fixed to the lower mold 12 of the thermoforming mold 1 through the T-slot to ensure the stable position of the lower mold 12.

[0068] In some embodiments, see Figures 4 to 9 , also includes a thermoforming mold 1, the thermoforming mold 1 includes: an upper mold 11 and a lower mold 12, a cavity for placing the workpiece 4 is formed between the upper mold 11 and the lower mold 12, and a cavity is provided inside the upper mold 11 and the lower mold 12, and a hollow part 13 is provided at the target position on one side of the upper mold 11 and the lower mold 12 close to the cavity, and the hollow part 13 is connected to the cavity so that the medium in the cavity can be sprayed onto the workpiece 4 through the hollow part 13; a plurality of ejectors 14, and the ejectors 14 are installed in the cavity of the upper mold 11 and / or the lower mold 12; a plurality of medium pipelines 15, which are arranged in the cavity, and the medium pipeline 15 is used to provide medium to the ejector 14, and the pressure of the medium pipeline 15 is adjustable. Specifically, the thermoforming die 1 is suitable for most thermoforming materials in the automotive industry, including high-corrosion-resistant steel plates with single or composite coatings such as hot-dip galvanizing, hot-dip zinc-nickel, hot-dip galvanized iron alloy, electro-galvanizing, electro-galvanizing nickel, hot-dip aluminum-zinc, and hot-dip aluminum-silicon. Products produced using this die exhibit excellent mechanical properties and corrosion resistance during use and are suitable for use in front and rear bumpers, longitudinal load-bearing beams, roof side rails, door panel reinforcements, transverse support beams, floor tunnels, suspension mounts, A / B pillars, door sill safety structures, and battery casings for both traditional fuel-powered and new energy vehicles.

[0069] The thermoforming mold 1 forms a specific shape and size of the workpiece 4 through the cavity structure between the upper mold 11 and the lower mold 12; in order to meet the soft and hard zoning requirements of the workpiece 4, the present application provides cavities inside the upper mold 11 and the lower mold 12, and provides a hollow part 13 on the side of the upper mold 11 and the lower mold 12 close to the cavity. The hollow part 13 should be located at the target position of the upper mold 11 and the lower mold 12, and the target position is determined according to the soft and hard zoning on the workpiece 4. Specifically, the cooling rate corresponding to the hard area of ​​the workpiece 4 is larger, and the hollow part 13 can be set at the corresponding position; by arranging a medium pipeline 15 in the cavity, a number of ejectors 14, i.e., nozzles, are distributed on the medium pipeline 15. Through the setting of the ejector 14, the medium in the medium pipeline 15 is sprayed onto the workpiece 4 to ensure that the cooling rate of the hard area in the workpiece 4 is increased, and for In the soft zone of the workpiece 4, there is no need to provide the hollow portion 13, thereby reducing the cooling rate of the workpiece 4. More specifically, the number and size of the hollow portions 13 at the positions corresponding to the hard zone of the workpiece 4 can be appropriately increased to increase the contact area between the medium and the workpiece 4, thereby increasing the cooling rate of the workpiece 4 in this area. Furthermore, the arrangement direction of the medium pipeline 15 is adapted to the shape of the workpiece 4, and the medium pressure in the same medium pipeline 15 is the same. For example, the pressure in the medium pipeline 15 corresponding to the hard zone of the workpiece 4 can be greater than the pressure in the medium pipeline 15 corresponding to the soft zone of the workpiece 4. Alternatively, different medium types or different medium temperatures can be provided in different medium pipelines 15 to achieve different temperature control in the soft and hard zones, thereby improving the forming accuracy and efficiency of the workpiece 4, effectively eliminating quenching deformation of the workpiece 4, and achieving good weldability and preventing oxidation of the workpiece 4 surface. This thermoforming die can meet the thermoforming processing requirements of soft and hard zones or full hard zones, while also having the characteristics of precise forming, good weldability, effective elimination of quenching deformation, and preventing oxidation of the workpiece 4 surface after quenching.

[0070] In some embodiments, the pressures within at least two media pipelines 15 differ; the higher the pressure, the faster the workpiece 4 cools. Different pressure settings can be used for the soft and hard zones to meet different requirements. In some embodiments, the temperatures of the media within at least two media pipelines 15 differ; the lower the temperature, the faster the workpiece 4 cools. Different temperature settings can be used for the soft and hard zones to meet different requirements. In some embodiments, the media within at least two media pipelines 15 contain different types of media. For example, liquid water, compressed air, or a gas-liquid mixture can be selected. By introducing different media types into the media pipelines 15, different cooling requirements can be met.

[0071] In some embodiments, it also includes a mold upper connecting plate 16 and a mold lower connecting plate 17. The upper mold 11 is installed on the mold upper connecting plate 16 and moves according to the mold upper connecting plate 16. The lower mold 12 is installed on the mold lower connecting plate 17 and moves with the mold lower connecting plate 17. Further, the mold upper connecting plate 16 and the mold lower connecting plate 17 are respectively installed on the upper slider 22 and the lower slider 23 of the thermoforming equipment 2. The mold upper connecting plate 16 and the mold lower connecting plate 17 are moved closer or farther away from each other by the upper slider 22 and the lower slider 23, thereby completing the mold closing and mold opening of the upper mold 11 and the lower mold 12.

[0072] In some embodiments, the location of the hollow portion 13 corresponds to the hard area of ​​the workpiece 4. Since the medium in the hollow portion 13 is in direct contact with the workpiece 4, the medium can cool the workpiece 4 more quickly through the hollow portion 13, thereby increasing the hardness of the workpiece 4 in this area. Furthermore, to enhance the effect of the jet 14 on the workpiece 4, the installation position of the jet 14 corresponds to the location of the hollow portion 13. Of course, the position of the jet 14 can also be adjusted as needed or according to the size and shape of the cavity. The cooling rate of the workpiece 4 is primarily adjusted by the location and size of the hollow portion 13, as well as the pressure, temperature, and type of the medium.

[0073] In some embodiments, the hollow portions 13 are located between adjacent support contact portions 110, and the support contact portions 110 and the hollow portions 13 are arranged alternately. By arranging the support contact portions 110 and the hollow portions 13 alternately, processing can be facilitated and the positional constraints on the workpiece 4 can be improved. In addition, the density of the hollow portions 13 can be appropriately increased at positions corresponding to the hard areas of the workpiece 4. The support contact portions 110 are in the shape of elastic slats. Specifically, the support contact portions 110 adopt a slat-shaped structure. By leaving a certain elastic margin in the support contact portions 110, the entire quenching process of the workpiece 4, which is heated to a temperature above Ac3, can be compatible with cooling to a temperature below a preset temperature, thereby transforming from austenite to martensite. The preset temperature can be 0-400°C. Since the workpiece 4 undergoes a large deformation during the entire quenching process, the slat-shaped structure can constrain the shape change of the workpiece 4 to a certain extent, which is beneficial to the hot forming of the workpiece 4 and improves the forming accuracy of the workpiece 4.

[0074] In some embodiments, the width of the support contact portion 110 is 3-50 mm. The width of the support contact portion 110 should not be too small, as it should provide support for the workpiece 4, nor should it be too large, as this will result in poor cooling effect. The width of the hollow portion 13 is 3-90 mm. The width of the hollow portion 13 should not be too small, as this will result in poor cooling effect, nor should it be too large, as this will affect the width of the support contact portion 110, thereby failing to provide good support for the workpiece 4. And / or, the distance between the ejector 14 and the workpiece 4 is 120-600 mm. The distance between the ejector 14 and the workpiece 4 refers to the distance between the ejector 14 and the workpiece 4 after the upper mold 11 and the lower mold 12 are closed. The size of the distance between the ejector 14 and the workpiece 4 will be adjusted according to the injection rate and flow rate of the medium. The injection shape of the ejector 14 is conical, and the central angle of the cone is less than or equal to 125°. This setting can better spray the medium on the workpiece 4 and increase the cooling rate of the workpiece 4. Furthermore, the transition zone between the soft and hard partitions is 3mm to 60mm, which has a wide range of applications. The support contact portion 110 is made of stainless steel, and / or the surface of the support contact portion 110 has a wear-resistant coating to increase the service life.

[0075] In some embodiments, a connector for installing the media pipeline 15 into the cavity is further included. The position of the connector is adjustable to change the position and angle of the media pipeline 15 in the cavity. Specifically, the connector includes an upper connector 18 and a lower connector 19. There are two upper connectors 18 and two lower connectors 19. The media pipeline 15 in the upper mold 11 is installed between the two upper connectors 18, and the media pipeline 15 in the lower mold 12 is installed between the two lower connectors 19. The installation height of the media pipeline 15 in the upper mold 11 can be adjusted by the upper connector 18, and the installation height of the media pipeline 15 in the lower mold 12 can be adjusted by the lower connector 19, thereby changing the distance between the ejector 14 and the workpiece 4.

[0076] In some embodiments, the process further includes: a plurality of boosting devices, wherein the number of media pipelines 15 is the same as that of the boosting devices, and the number of the media pipelines 15 corresponds to one another; a controller connected to the boosting devices, the controller being used to obtain the positions of the soft and hard areas of the workpiece 4, and to determine the target pressure required for each media pipeline 15 based on the positions of the soft and hard areas of the workpiece 4; and the controller being used to control the operation of the boosting devices based on the target pressure. In the above arrangement, the controller controls the boosting devices and adjusts the pressure in the media pipelines 15 to meet the injection pressure of the ejector 14 on each media pipeline 15. Since the media pipelines 15 correspond to the boosting devices one by one, it is only necessary to obtain the distribution positions of the soft and hard areas in the workpiece 4 to adjust the pressure applied by the boosting devices accordingly, thereby achieving automatic control, which is conducive to improving the degree of automation, reducing interference from human factors, maximizing the accuracy and efficiency of the thermoforming of the workpiece 4, and improving product quality.

[0077] In some embodiments, further comprising:

[0078] The upper mold water supply installation adapter 25 is used to connect to the external pipeline. The upper mold water supply installation adapter 25 is installed on the equipment frame 21, and the upper mold 11 is provided with a quick-release joint that is detachably connected to the upper mold water supply installation adapter 25, and the quick-release joint is connected to the medium pipeline 15. Specifically, the upper mold water supply installation adapter 25 can be directly integrated into the equipment frame 21, or connected to the equipment frame 21 by bolts. The external pipeline transfers the medium to be cooled to the upper mold water supply installation adapter 25 through a flexible connection or a hard connection. The upper mold 11 of the thermoforming mold 1 has a quick-change joint, and a hose or a hard pipe can be connected in the middle to supply the cooling medium. Of course, it can also include a lower mold water supply installation adapter for connecting to the external pipeline. The lower mold water supply installation adapter is installed on the equipment frame 21, and the lower mold 12 is provided with a quick-release joint that is detachably connected to the lower mold water supply installation adapter, and the quick-release joint is connected to the medium pipeline 15. Specifically, the lower mold water supply adapter can be directly integrated into the equipment frame 21 or connected to it via bolts. External piping transfers the cooling medium to the lower mold water supply adapter via flexible or rigid connections. The lower mold 12 of the thermoforming mold 1 has a quick-change connector, which can be connected to a flexible hose or rigid pipe to supply the cooling medium. Furthermore, the upper mold water supply adapter 25 and the lower mold water supply adapter are compatible with high and low pressures, and can accommodate different pressures from 0.1 MPa to 30 MPa, adapting to different working conditions.

[0079] In some embodiments, an upper water channel interface 26 and a lower water channel interface 27 are further included. The upper water channel interface 26 is installed on the upper slider 22, and the lower water channel interface 27 is installed on the lower slider 23. The upper water channel interface 26 is connected to the quick-release connector. The upper water channel interface 26 is connected to the upper mold water supply installation adapter 25 through a hose or a hard pipe, so that the medium is transported to the upper mold 11 to facilitate the quenching process.

[0080] In some embodiments, further comprising:

[0081] The exhaust gas collecting component 28 is used to collect the exhaust gas during the quenching process. The exhaust gas collecting component 28 is installed on the top of the equipment frame 21;

[0082] The water circulation system 29 is used to collect the medium and recycle it. The water circulation system 29 includes: a circulating water collection tank 29-1, which is used to store the cooling water recovered from the self-heating forming mold 1 and perform a primary filtration on the cooling water; a return water component 29-2, which is used to extract the cooling water from the heat forming mold 1 and transport it to the circulating water collection tank 29-1. The return water component 29-2 is connected to the circulating water collection tank 29-1; a water storage tank component 29-3, which is used to store the once filtered circulating water in the circulating water collection tank 29-1. The water storage tank component 29-3 can stabilize the water pressure and water volume, making the water supply process of the quenching equipment smoother and smoother; a water supply component 29-4, which is used to obtain the circulating water collection tank 29-1. The primary filtered circulating water in the collecting tank 29-1 is delivered to the water storage tank component 29-3, and the water storage tank component 29-3 is connected to a water supply channel for delivering cooling water to the thermoforming mold 1; the secondary filter 29-5 and / or the tertiary filter 29-6 are installed on the water supply channel to perform secondary and / or tertiary filtration on the cooling water in the water supply channel, the secondary filter 29-5 is used to filter the water in the water supply channel, and the tertiary filter 29-6 filters the water in the water supply channel again to ensure the cleanliness of the water used by the equipment; the high-pressure water pump 29-7 is installed on the water supply pipe 29-8 to adjust the water supply pressure of the water supply channel, and its adjustable range is 0-3Mpa.

[0083] In some embodiments, a guide mechanism 210 is further included, which is installed in the equipment frame 21, and the upper slider 22 is slidably connected to the guide mechanism 210; the lower slider 23 is slidably installed in the equipment frame 21, and the lower slider 23 can slide from the inside of the equipment frame 21 to the outside to replace the mold. In the above arrangement, the guide mechanism 210 can be a guide rail, such as a steel guide rail. By setting the guide mechanism 210, the smoothness of the upper slider 22 during the lifting process can be improved, thereby further improving the moving position accuracy of the upper slider 22, thereby improving the position accuracy of the upper mold 11; further, the lower slider 23 can slide from the inside of the equipment frame 21 to the outside, that is, the lower slider 23 is a movable workbench, which can be moved horizontally out of the equipment frame 21 to the left and right to replace the mold, thereby increasing the convenience and timeliness of replacing the mold.

[0084] In some embodiments, a device base is further provided at the bottom of the device frame 21. The device frame 21 is installed on the device base, which can better support the device frame 21 and ensure the stability of the device frame 21, thereby ensuring the smooth movement of the upper mold 11 and the lower mold 12.

[0085] In some embodiments, a quenching equipment protective cover 211 is also installed on the equipment frame 21 to protect the medium from splashing during the quenching process. A mold mounting position 212 is also installed on the equipment frame 21, and the thermoforming mold 1 is installed and replaced through the mold mounting position 212.

[0086] In a specific embodiment, the thermoforming equipment 2 includes an equipment frame 21 and an equipment base. The equipment frame 21 includes two parts, one part is installed on the equipment base, and the other part carries the transmission component 24. These three parts are the main frame part of the equipment, which carries all the mechanism installation and mechanism support, as well as the installation position of standard parts; the power component 24-1 provides power system support for the up and down movement and positioning of the equipment, and the brake transmission component 24-5 is used to transmit the power of the power component 24-1, and use the brake transmission component 24-5 for braking when positioning is required; the power conversion component 24-2 is used to lengthen the space of the transfer power system so that its entire work surface can be evenly stressed; the torque transfer mechanism 24-3 is used to expand the force space of the equipment and increase the downward pressure tonnage of the equipment. The guide mechanism 210 is used to balance the smoothness of the up and down movement of the entire upper slider 22. The upper slider 22 is provided with a mounting groove and a mounting plate for installing the upper Mold 11; the thermoforming mold 1 is a hot and cold partitioned thermoforming mold 1, which is used for quenching operations of the entire process of quenching thermoforming parts; the lower slider 23 is provided with a mounting groove and a mounting plate, which is the mounting part of the lower mold 12, and is used to fix the lower mold part of the thermoforming mold 1; the balancing cylinder 24-7 is used to balance the mounting groove and mounting plate of the upper slider 22, as well as the physical dead weight of the upper mold 11, reducing the torque and power of the power system, and playing a role in energy saving; the exhaust gas collection device is used to collect exhaust gas in the thermoforming quenching process for centralized recycling and treatment, and its flow rate can replace the air in the equipment once every 10 seconds; the upper water channel interface 26 is used to connect the upper mold 11 of the soft and hard partitioned thermoforming mold 1, and the upper water channel interface 26 provides a medium for quenching operations for the upper thermoforming mold 1; the lower water channel interface 27 is used to connect the lower mold 12 of the soft and hard partitioned thermoforming mold 1, and the lower water channel interface 27 provides a medium for quenching operations for the lower mold 12. Through the above settings, the power consumption of the device is reduced, the efficiency of the device is improved, and the floor space of the device is reduced.

[0087] The hot stamping process using the hot forming equipment 2 includes:

[0088] Step S1: Galvanized steel sheet blanking: Process the steel into coils or sheets and cut them according to the required size; or Al-Si steel sheet blanking can also be applied;

[0089] Step S2: cold stamping: using a mold to cold stamp to form a steel workpiece 4;

[0090] Step S3: Heating: The steel workpiece 4 is heated to a temperature above Ac3. When the steel surface is uncoated in step S1, the steel workpiece 4 is first heated to above 700°C at a rate of 12-28°C / s, then heated to above Ac3 at a rate of 1-5°C / s, and maintained at this temperature for 28-55 seconds. When the steel is surface treated by any of Zn plating, Al plating, Al-Si plating, and high-temperature oxidant coating in step S1, the steel workpiece 4 is heated at a rate of 8-15°C / s when the temperature is below 500°C, then heated to between 560°C and 980°C at a rate of 15-30°C / s, then heated to above Ac3 at a rate of 1-5°C / s, and maintained at this temperature for 28-55 seconds.

[0091] Step S4: transferring the workpiece 4 to the thermoforming equipment 2 of the soft and hard partitions and the full hard zone;

[0092] Step S5: The upper slider 22 is used to close the mold so that the upper and lower molds of the thermoforming mold 1 are fitted together;

[0093] Step S6: The high-pressure water pump 29-7 activates the booster device to supply water to the medium pipeline 15. Under the action of the pressure, the multiple ejectors 14 begin to spray the medium to perform hot forming and quenching on the workpiece 4. The exhaust gas collection device on the upper part of the patented device is also activated to collect the exhaust gas.

[0094] Step S7: After quenching is completed, the supercharging device stops, and the exhaust gas collection device also stops synchronously;

[0095] Step S8: The upper slider 22 performs the mold opening action until the mold opening is completed;

[0096] In the above process, the upper and lower pressing and releasing of the equipment and the clamping of the formed workpiece 4 are completed through the opening and closing action of the upper slider 22, wherein the opening of the booster device causes multiple ejectors 14 to perform quenching spraying, the opening of the booster device is after the clamping action, and the mold opening action is performed before the booster device is closed, the opening of the exhaust gas collection device is after the mold closing action is completed, and the work is stopped after the mold opening action is completed; the water circulation system 29 starts synchronously with the start of the mold closing of the patented equipment and stops synchronously after the quenching is completed.

[0097] In addition to the above-mentioned thermoforming device 2 , the present invention further provides a thermoforming system 3 including the above-mentioned thermoforming device 2 .

[0098] In some embodiments, see Figures 10 to 14, and also includes a tunnel furnace, which is provided with a workpiece placement position 31-1, a heating zone 31-2, a heat preservation zone 31-3 and a grabbing area 31-4 in the furnace from the loading end to the lower end; it also includes a workstation loading device 32 and an automatic loading robot 33, the automatic loading robot 33 is used to grab the workpiece 4 in the workstation loading device 32 and place it in the workpiece placement position 31-1; it also includes a truss manipulator 34 and a medium supply and recovery device 35, the hot forming equipment 2 is located between the truss manipulator 34 and the medium supply and recovery device 35, the truss manipulator 34 is used to move the workpiece 4 in the grabbing area 31-4 in the furnace to the hot forming equipment 2. Specifically, the workstation loading equipment 32 can be a six-workstation loading equipment 32: used for manual loading, one workstation for loading, and five workstations for standby. Each workstation can make 1 to 4 workpieces 4, which are loaded by the automatic loading robot 33. The automatic loading robot 33 is responsible for the automatic loading and grabbing of the six-workstation loading equipment 32. The automatic loading robot 33 cooperates with the truss manipulator 34 to perform end-to-end grabbing and pick and place the workpiece 4; the workpiece placement position 31-1 is the area outside the furnace where the automatic loading robot 33 grabs the workpiece 4; in the heating zone 31-2, the tunnel furnace can perform the same top and bottom loading of the workpiece 4. The workpiece 4 is heated at the same time; the heat preservation zone 31-3 can be used to heat and convey the heated workpiece 4; the grabbing zone 31-4 in the furnace can position and grab the heated workpiece 4 at this station; the truss manipulator 34 is used to position and grab the workpiece 4 that has been heated and kept warm, and place it in the thermoforming mold 1; the thermoforming equipment 2 quenches and forms the heated workpiece 4 to meet the preset mechanical performance requirements; the medium supply and recovery device 35 is used to filter, pressurize and convey the cooling medium, and recycle it for secondary use; the thermoforming mold 1 is used to quench the workpiece 4 placed in the thermoforming equipment 2.

[0099] Of course, the tunnel furnace can also be replaced by a box furnace, the hot forming mold 1 is located in the box furnace, the workpiece 4 is placed in the box furnace for the entire process, and the position of the workpiece 4 in the box furnace remains unchanged.

[0100] In some embodiments, the truss manipulator 34 includes a first supporting column 34-1, a second supporting column 34-2, a transverse support member 34-3, a gripping mechanism 34-4 and a mechanism motion assembly 34-5. The first supporting column 34-1 and the second supporting column 34-2 are respectively placed at both ends of the transverse support member 34-3, and the gripping mechanism 34-4 is suspended at the bottom of the mechanism motion assembly 34-5 through a fourth axis connection mechanism; further, a floating connection 34-4-9 is provided at the end of the gripping cylinder 34-4-2, and the floating connection 34-4-9 is hinged to the end of the gripping transmission rod 34-4-3. The accompanying drawings show the structure when the floating connection 34-4-9 is not connected to the gripping transmission rod 34-4-3. Specifically, the first support column 34-1 and the second support column 34-2 are used to support the grasping mechanism 34-4, the first hook 34-4-7 and the second hook 34-4-8 are located at the grasping end of the grasping mechanism 34-4, and the grasping cylinder 34-4-2 can realize the left and right movement of the grasping end; the transverse support member 34-3 is used to carry the transverse movement of the truss manipulator 34; the grasping mechanism 34-4 can also move forward and backward, that is, the grasping mechanism 34-4 can move in three directions: up and down, left and right, and front and back; A supporting column 34-1 and a second supporting column 34-2 together constitute the cantilever structure of the truss manipulator 34, which increases the flexibility and space of the equipment installation; the installation base of the truss manipulator 34 is used to fix the truss manipulator 34 to ensure the operating stability of the equipment; the grasping mechanism 34-4 is used to continuously grasp the workpiece 4 in the furnace in a high-temperature environment; the grasping frame 34-4-1 serves as the fourth axis mechanism of the truss manipulator 34, and is used to bear the gravity and overturning force of the hook at the picking end of the grasping mechanism 34-4.

[0101] In some embodiments, the grabbing mechanism 34-4 includes a grabbing frame 34-4-1, a grabbing cylinder 34-4-2, a grabbing transmission rod 34-4-3, a transmission rod fixing sleeve 34-4-4 and a transmission lever 34-4-5. The grabbing cylinder 34-4-2 is mounted on the grabbing frame 34-4-1. A cylinder protective cover 34-4-6 is further provided on the outside of the grabbing cylinder 34-4-2. The grabbing transmission rod 34-4-3 is slidably connected to the transmission rod fixing sleeve 34-4-4. One end of the grabbing transmission rod 34-4-3 is connected to the grabbing cylinder 34-4-2, and the other end is connected to the grabbing cylinder 34-4-2. The end is connected to the transmission lever 34-4-5; and, a first hook 34-4-7 is provided at the bottom of the grabbing frame 34-4-1, and a second hook 34-4-8 is provided at the bottom of the transmission lever 34-4-5. When the workpiece 4 moves to the grabbing area 31-4 in the tunnel furnace, one end of the workpiece 4 moves to the first hook 34-4-7, and the grabbing cylinder 34-4-2 drives the grabbing transmission rod 34-4-3 to move horizontally, so as to drive the transmission lever 34-4-5 to swing, and the transmission lever 34-4-5 drives the second hook 34-4-8 to swing to clamp the other end of the workpiece 4. Specifically, the grabbing frame 34-4-1 is used to support the overall mechanical structure installation of the grabbing mechanism 34-4, and the use of high-temperature resistant materials can continuously work in a high-temperature environment; the cylinder protective cover 34-4-6 is used to isolate heat radiation and protect the transmission mechanism, that is, the durability of the grabbing cylinder 34-4-2; the floating connector 34-4-9 is used to connect the grabbing cylinder 34-4-2 and the grabbing transmission rod 34-4-3; the grabbing transmission rod 34-4-3 is used to transmit the movement of the entire mechanical mechanism, including supporting, moving and other actions, and the transmission rod fixing sleeve 34-4-4 is used to fix the forward and backward movement stability of the grabbing transmission rod 34-4-3 during the transmission process; the transmission lever 34-4-5 is clamped or rotated under the action of the grabbing transmission rod 34-4-3 to complete the clamping of the workpiece 4.

[0102] In some embodiments, the mechanism motion assembly 34-5 includes a mechanism motion support body and a fourth-axis servo motor 34-5-1, a motor protective cover 34-5-2, a harmonic reducer 34-5-3, a driving component 34-5-4 and a heat shield 34-5-5 installed on the mechanism motion support body. The motor protective cover 34-5-2 is provided on the fourth-axis servo motor 34-5-1, the harmonic reducer 34-5-3 is connected between the fourth-axis servo motor 34-5-1 and the driving component 34-5-4, the heat shield 34-5-5 is installed at one end of the driving component 34-5-4 close to the grasping mechanism 34-4, the grasping mechanism 34-4 is installed on the driving component 34-5-4, and can follow the movement of the driving component 34-5-4; the mechanism motion support body is also provided with a cooling component 34-5 -6, the cooling component 34-5-6 is used to introduce cold air into the mechanism motion support body to cool the fourth-axis servo motor 34-5-1; the fourth axis of the truss manipulator 34 adopts a servo motor plus a harmonic reducer 34-5-3, and a bearing 34-5-7 is also provided between the driving component 34-5-4 and the mechanism motion support body. The bearing 34-5-7 can be a double angular contact bearing 34-5-7 or a cross roller bearing 34-5-7 structure. In order to offset the lateral force of the grasping mechanism 34-4, its axial load is designed to withstand 500KG. In order to ensure the working life of the bearing 34-5-7 in a heat radiation environment, a double insurance of heat insulation material and heat insulation coating is adopted, so that it can continuously work in a high-temperature heat radiation environment; the heat insulation board 34-5-5 is used to block heat conduction and radiation heat components.

[0103] The hot forming system 3 adopts an in-furnace grasping solution, which reduces the air cooling time of the hot formed parts. The cycle time from grasping the workpiece 4 to placing it in the hot forming die 1 can be achieved within 11 seconds, better ensuring the structural changes of the parts. In addition, the quenching equipment, the hot forming die 1 and the water cooling system operate according to automated logic. In the first stage, a fluid water spray method is used to directly contact the fluid cooling medium with the surface of the steel workpiece 4 heated to above Ac3, causing it to drop to 250-450℃ within a control time of 3-15 seconds. In the second stage, the cooling medium is directly cooled to 250-450℃. The first stage adopts the fluid water blowing method to make the fluid cooling medium directly contact the surface of the steel workpiece 4, so that the temperature of the surface of the steel workpiece 4 is reduced to below 180°C within a control time of 3 seconds to 10 seconds; of course, the temperature of the surface of the steel workpiece 4 can also be cooled continuously without two stages, for example, it can be reduced to below 100°C within a control time of 2 seconds to 30 seconds; this process adopts the heat exchange method to achieve the purpose of quenching the workpiece 4; the pressure and positioning dual-mode control type of the quenching equipment is used to maintain the overall fit of the upper and lower molds, and the pressure requirement is not large. The overall tonnage is controlled at 2 -300 tons; the gripping mechanism 34-4 of the truss manipulator 34 is made of high temperature resistant material and can work continuously at a temperature of 1000 degrees Celsius; the gripping frame 34-4-1 of the truss manipulator 34 is treated with a high temperature resistant coating and has circulating cold air inside, so that it can continuously maintain its mechanical properties and mechanical properties in a 1100°C heat radiation environment, so that it can continue to work continuously in this environment; the fourth axis of the truss manipulator 34 adopts a servo motor plus a harmonic reducer 34-5-3, in order to offset the gripping mechanism In order to reduce the lateral force of structure 34-4, a double angular contact bearing 34-5-7 or a cross roller bearing 34-5-7 structure is designed, and its axial load can withstand 500KG. In order to ensure the working life of bearing 34-5-7 in a heat radiation environment, a double insurance of heat insulation material and heat insulation coating is adopted, so that it can continuously work in a high-temperature heat radiation environment; the thermoforming system 3 only has manual loading in the first station 6 station turntable loading area, and all other operations are fully automatic, with complete automatic program control to ensure fully automatic production of the production line.

[0104] Specifically, the hot stamping process using the hot forming system 3 includes:

[0105] Step S1: Galvanized steel sheet blanking: Process the steel into coils or sheets and cut them according to the required size; or Al-Si steel sheet blanking can also be applied;

[0106] Step S2: cold stamping: using a mold to cold stamp to form a steel workpiece 4;

[0107] Step S3: Heating: The steel workpiece 4 is heated to a temperature above Ac3. When the steel surface is uncoated in step S1, the steel workpiece 4 is first heated to above 700°C at a rate of 12-28°C / s, then heated to above Ac3 at a rate of 1-5°C / s, and maintained at this temperature for 28-55 seconds. When the steel is surface treated by any of Zn plating, Al plating, Al-Si plating, and high-temperature oxidant coating in step S1, the steel workpiece 4 is heated to a temperature below 500°C at a rate of 8-15°C / s in step S3, then heated to a temperature between 560°C and 980°C at a rate of 15-30°C / s, then heated to above Ac3 at a rate of 1-5°C / s, and maintained at this temperature for 28-55 seconds.

[0108] Step S4: transferring the workpiece 4 to the thermoforming equipment 2 through the truss machine robot;

[0109] Step S5: The upper mold 11 assembly is clamped along the X direction so that it gradually fits the workpiece 4 and is pressed against the lower mold 12 assembly;

[0110] Step S6: activating the quenching equipment in the hot forming equipment 2 to perform quenching. Under the action of pressure, the multiple ejectors 14 begin to eject the medium to perform hot forming quenching on the workpiece 4.

[0111] Step S7: After quenching is completed, the supercharging device stops;

[0112] Step S8: The upper mold 11 assembly moves in the opposite direction until the mold opening is completed;

[0113] Step S9: The robot grabs the quenched product and places it in the shot blasting and oiling equipment to proceed to the next process.

[0114] The hot forming system 3 can enhance the controllability of steel quenching, simplify the production process of the hot forming process, reduce the power consumption of the hot forming equipment 2, improve the efficiency of the equipment, and reduce the equipment's footprint.

[0115] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0116] The above describes in detail the thermoforming equipment provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The above examples are intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art will be able to make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention.

Claims

1. A thermoforming device, characterized in that: include: Device Frame (21); An upper slider (22) and a lower slider (23) are both mounted on the equipment frame (21), the upper slider (22) is used to drive the upper mold (11) to move, and the lower slider (23) is used to support the lower mold (12); A transmission assembly (24) is mounted on the equipment frame (21), the transmission assembly (24) comprising a power component (24-1), a power conversion component (24-2) connected to the power component (24-1), a torque transfer mechanism (24-3) connected to the power conversion component (24-2), and a feedback encoder (24-4) for obtaining the rotation angle of the torque transfer mechanism (24-3), the power conversion component (24-2) and the torque transfer mechanism (24-3) both being gear-shaped; the torque transfer mechanism (24-3) is used to drive the upper slider (22) to move toward or away from the lower slider (23); A controller, the power component (24-1) and the feedback encoder (24-4) are both connected to the controller, and the controller is used to control the action of the power component (24-1) according to the rotation angle of the torque transfer mechanism (24-3) obtained by the feedback encoder (24-4); It also includes a thermoforming mold (1), wherein the thermoforming mold (1) includes: The upper mold (11) and the lower mold (12) form a cavity for placing the workpiece (4) therein, and the upper mold (11) and the lower mold (12) are both provided with a cavity therein, and a hollow portion (13) is provided at a target position on one side of the upper mold (11) and the lower mold (12) close to the cavity, and the hollow portion (13) is communicated with the cavity so that the medium in the cavity can be sprayed onto the workpiece (4) through the hollow portion (13); the setting position of the hollow portion (13) corresponds to the hard area position of the workpiece (4); a plurality of ejectors (14), wherein the ejectors (14) are installed in the cavities of the upper mold (11) and / or the lower mold (12); A plurality of medium pipelines (15) are arranged in the cavity, the medium pipelines (15) are used to provide medium to the injection body (14), and the pressure of the medium pipelines (15) is adjustable.

2. The thermoforming equipment according to claim 1, characterized in that The transmission assembly (24) further includes a brake transmission component (24-5) for transmitting the power of the power component (24-1) to the power conversion component (24-2). The brake transmission component (24-5) is connected between the power component (24-1) and the power conversion component (24-2), and the brake transmission component (24-5) is connected to the controller. The controller is also used to control the brake transmission component (24-5) to stop after the upper slider (22) moves to the target position.

3. The thermoforming equipment according to claim 2, characterized in that The transmission assembly (24) further includes a rotating connection component (24-6), one end of the rotating connection component (24-6) is hinged to the torque transfer mechanism (24-3), and the other end is hinged to the upper slider (22), and the torque transfer mechanism (24-3) pulls the upper slider (22) up and down through the rotating connection component (24-6); and the number of the power conversion component (24-2), the torque transfer mechanism (24-3) and the rotating connection component (24-6) is at least two, and they are symmetrically distributed along the left and right sides of the brake transmission component (24-5), and at least one rotating connection component (24-6) is distributed and connected to the left and right sides of the upper slider (22).

4. The thermoforming equipment according to claim 1, characterized in that A work surface is provided on the upper portion of the lower sliding block (23), and a plurality of positioning grooves for positioning the lower mold (12) and a plurality of fixing grooves for fixing the lower mold (12) are provided on the work surface, wherein the positioning grooves and the fixing grooves are arranged in an array.

5. The thermoforming equipment according to claim 1, characterized in that Also includes: An upper mold water supply installation adapter (25) is used to connect an external pipeline. The upper mold water supply installation adapter (25) is installed on the equipment frame (21), and the upper mold (11) is provided with a quick-release joint that is detachably connected to the upper mold water supply installation adapter (25). The quick-release joint is connected to the medium pipeline (15).

6. The thermoforming equipment according to claim 1, characterized in that Also includes: An exhaust gas collecting component (28) for collecting exhaust gas during the quenching process, wherein the exhaust gas collecting component (28) is installed on the top of the equipment frame (21); A water circulation system (29) is used to collect media and recycle them; the water circulation system (29) includes: a circulating water collection box (29-1) for storing cooling water recovered from the self-heating forming mold (1) and performing a primary filtration on the cooling water; a return water component (29-2) for extracting cooling water from the heat forming mold (1) and delivering it to the circulating water collection box (29-1), the return water component (29-2) being connected to the circulating water collection box (29-1); a water storage tank component (29-3) for storing the primary filtered circulating water in the circulating water collection box (29-1); a water supply component (29 -4), used to obtain the primary filtered circulating water in the circulating water collection box (29-1) and deliver it to the water storage tank component (29-3), the water storage tank component (29-3) is connected to a water supply channel for delivering cooling water to the thermoforming mold (1); a secondary filter (29-5) and / or a tertiary filter (29-6), installed on the water supply channel, used to perform secondary and / or tertiary filtration on the cooling water in the water supply channel; a high-pressure water pump (29-7), installed on the water supply pipe (29-8), used to adjust the water supply pressure of the water supply channel, and its adjustable range is 0-3Mpa.

7. The thermoforming equipment according to any one of claims 1 to 6, characterized in that The device further comprises a guide mechanism (210) installed in the device frame (21), and the upper slider (22) is slidably connected to the guide mechanism (210); the lower slider (23) is slidably installed in the device frame (21), and the lower slider (23) can slide from the inside of the device frame (21) to the outside to replace the mold.

8. A thermoforming system, characterized in that: Comprising a thermoforming device (2) as claimed in any one of claims 1 to 7.

9. The thermoforming system according to claim 8, characterized in that The invention also includes a tunnel furnace, wherein the tunnel furnace is provided with a workpiece placement position (31-1), a heating zone (31-2), a heat preservation zone (31-3) and a furnace grabbing zone (31-4) in sequence from the loading end to the lower feeding end; the invention also includes a station loading device (32) and an automatic loading robot (33), wherein the automatic loading robot (33) is used to grab the workpiece (4) in the station loading device (32) and place it in the workpiece placement position (31-1); the invention also includes a truss manipulator (34) and a medium supply and recovery device (35), wherein the thermoforming device (2) is located between the truss manipulator (34) and the medium supply and recovery device (35), and the truss manipulator (34) is used to move the workpiece (4) in the furnace grabbing zone (31-4) to the thermoforming device (2).

10. The thermoforming system according to claim 9, characterized in that The truss manipulator (34) comprises a first supporting column (34-1), a second supporting column (34-2), a transverse supporting member (34-3), a grasping mechanism (34-4) and a mechanism motion assembly (34-5), wherein the first supporting column (34-1) and the second supporting column (34-2) are respectively placed at two ends of the transverse supporting member (34-3), and the grasping mechanism (34-4) is suspended on the mechanism motion assembly (34-5) via a fourth axis connection mechanism. 34-5); the grabbing mechanism (34-4) includes a grabbing frame (34-4-1), a grabbing cylinder (34-4-2), a grabbing transmission rod (34-4-3), a transmission rod fixing sleeve (34-4-4) and a transmission lever (34-4-5); the grabbing cylinder (34-4-2) is mounted on the grabbing frame (34-4-1); a cylinder protective cover (34-4-6) is further provided on the outside of the grabbing cylinder (34-4-2); The grabbing transmission rod (34-4-3) is slidably connected to the transmission rod fixing sleeve (34-4-4); one end of the grabbing transmission rod (34-4-3) is connected to the grabbing cylinder (34-4-2), and the other end is connected to the transmission shift rod (34-4-5); and a first hook (34-4-7) is provided at the bottom of the grabbing frame (34-4-1), and a second hook (34-4-8) is provided at the bottom of the transmission shift rod (34-4-5). When the workpiece (4) moves to the grabbing area (31-4) in the tunnel furnace, one end of the workpiece (4) moves to the first hook (34-4-7), and the grabbing cylinder (34-4-2) drives the grabbing transmission rod (34-4-3) to move horizontally, thereby driving the transmission lever (34-4-5) to swing, and the transmission lever (34-4-5) drives the second hook (34-4-8) to swing, thereby clamping the other end of the workpiece (4).

11. The thermoforming system according to claim 10, characterized in that The mechanism motion assembly (34-5) includes a mechanism motion support body and a fourth-axis servo motor (34-5-1) mounted on the mechanism motion support body, a motor protective cover (34-5-2), a harmonic reducer (34-5-3), a driving component (34-5-4) and a heat shield (34-5-5), wherein the motor protective cover (34-5-2) is provided on the fourth-axis servo motor (34-5-1), the harmonic reducer (34-5-3) is connected to the fourth-axis servo motor (34-5-1) and the driving component ( 34-5-4), the heat insulation plate (34-5-5) is installed on one end of the driving component (34-5-4) close to the grasping mechanism (34-4), and the grasping mechanism (34-4) is installed on the driving component (34-5-4) and can follow the movement of the driving component (34-5-4); a cooling component (34-5-6) is also installed on the mechanism motion support body, and the cooling component (34-5-6) is used to introduce cold air into the mechanism motion support body to cool the fourth-axis servo motor (34-5-1).

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