Composite hot forming die for automobile anti-collision beam and a-pillar inner panel

Abstract

The application provides a composite hot forming die for automobile anti-collision beams and A-column inner plates, which comprises an upper die frame and a lower die frame; an upper liquid path pipeline is installed on the upper die frame, and the upper liquid path pipeline is installed on the upper die frame, and through the relatively reasonable combination structure distribution of the automobile anti-collision beams and the A-column inner plates, the operation of one-time hot stamping forming of six groups of product parts, i.e. left front door anti-collision beams, right front door anti-collision beams, left rear door anti-collision beams, right rear door anti-collision beams, left A-column inner plates and right A-column inner plates, can be synchronously completed on four groups of original sheets, and the detachable combined die structure and the gas path pipeline and the liquid path pipeline which are reasonably arranged on the upper die frame and the lower die frame can not only ensure that subsequent local maintenance and replacement are more convenient, but also ensure that the structure after replacement can also provide stable and uniform heat exchange and pneumatic effect for the upper die and the lower die in the die closing stamping process.

Description

Technical Field

[0001] This invention relates to a thermoforming composite mold, and more particularly to a composite thermoforming mold for automotive anti-collision beams and A-pillar inner panels. Background Technology

[0002] Currently, cold stamping is still the most common method for stamping automotive anti-collision beams and A-pillar inner panels. During the stamping process, if the mold frame or a part of the insert is damaged, the whole thing needs to be replaced, resulting in high maintenance costs. In addition, for some workshops that need to produce in large quantities, the raw material sheets are usually transported in an assembly line manner and placed into the stamping station by grippers. However, when stamping automotive anti-collision beams and A-pillar inner panels, if six raw material sheets are transported simultaneously and clamped by grippers, positioning errors are very likely to occur, which will affect the forming quality.

[0003] For example, a composite thermoforming mold (publication number CN204657270U) includes an upper mold base and a lower mold base with a preset positioning structure, as well as a universal forming device and a side-flanging device that are positioned and installed by the positioning structure. The universal forming device includes a movable upper mold, a fixed upper mold, a fixed lower mold, a positioning pin, and an ejector pin. The side-flanging device includes a driving wedge, a driven wedge assembly, and a side-flanging block. The driving wedge is installed on the upper mold base, and the side of the driving wedge is set as a wedge-shaped surface. The driven wedge assembly is installed on the lower mold base, and the driven wedge assembly includes a fixedly set slide and a side baffle. A sliding block matching the driving wedge is installed on the slide, and the other end of the sliding block is installed with the side-flanging block. This utility model completes the flanging operation while the movable upper mold is clamped, achieving the purpose of completing stretching and side-flanging in one step. It solves the thermoforming process problem of complex parts with multiple side-flangings. Although it is a composite mold, it is generally a symmetrical composite mold for the same parts, and it does not solve the aforementioned prior art problems. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide a composite thermoforming mold for automotive anti-collision beams and A-pillar inner panels. Through a more rational structural distribution, it can simultaneously complete the one-time hot stamping forming of six product parts—left front door anti-collision beam, right front door anti-collision beam, left rear door anti-collision beam, right rear door anti-collision beam, left A-pillar inner panel, and right A-pillar inner panel—from four sets of raw material sheets. Furthermore, the detachable and combinable mold structure, along with the rationally arranged air and hydraulic pipelines on the upper and lower mold frames, not only ensures more convenient subsequent local maintenance and replacement but also ensures that the replaced structure can still provide stable and uniform heat exchange and pneumatic effects for the upper and lower molds during the mold closing and stamping process.

[0005] This invention provides the following technical solution:

[0006] A composite thermoforming mold for automotive anti-collision beams and A-pillar inner panels includes an upper mold frame and a lower mold frame. The upper mold frame is provided with upper mounting processing surfaces 1, 2, 3, and 4. The lower mold frame is provided with lower mounting processing surfaces 1, 2, 3, and 4. Upper mounting surfaces 1, 2, 3, and 4 are correspondingly and detachably positioned and mounted with upper inserts 1, 2, 3, and 4. The lower mounting surfaces 1, 2, 3, and 4 are equipped with detachable lower inserts 1, 2, 3, and 4 respectively. After mold closing, upper insert 1 and lower insert 1 are pressed together to form the inner panel of the left A-pillar, upper insert 2 and lower insert 2 are pressed together to form the left front door anti-collision beam and the right front door anti-collision beam, upper insert 3 and lower insert 3 are pressed together to form the left rear door anti-collision beam and the right rear door anti-collision beam, and upper insert 4 and lower insert 4 are pressed together to form the inner panel of the right A-pillar.

[0007] The upper liquid pipeline is installed on the upper mold frame and includes upper heat exchange channels formed in upper inserts 1, 2, 3, and 4. The inlets of the upper heat exchange channels are connected to an upper liquid inlet manifold via pipes, and the outlets are connected to an upper liquid outlet manifold via pipes. The upper liquid inlet manifold and upper liquid outlet manifold are installed on the upper mold frame and connected to the heat exchange circulating liquid tank via upper liquid inlet valves and upper liquid outlet valves. The lower liquid pipeline is installed on the lower mold frame and includes lower heat exchange channels formed in lower inserts 1, 2, 3, and 4. The inlets of the lower heat exchange channels are connected to a lower liquid inlet manifold via pipes, and the outlets are connected to a lower liquid outlet manifold via pipes. The lower liquid inlet manifold and lower liquid outlet manifold are installed under the lower mold frame and connected to the lower liquid inlet valve and lower liquid outlet valve. The system includes a heat exchange circulating liquid tank; upper inserts 1, 2, 3, and 4 each have an upper fixed insert and an upper movable insert driven by an upper ejector nitrogen cylinder. The air inlet of the upper ejector nitrogen cylinder is connected to an upper compressed air collection block via an air pipe. The upper compressed air collection block is mounted on the upper mold frame and connected to an air source via an upper air inlet valve, thus ensuring that the pressure of each upper ejector nitrogen cylinder connected to the same pressure gauge remains consistent; lower inserts 1, 2, 3, and 4 each have a lower fixed insert and a lower movable insert driven by a lower ejector nitrogen cylinder. The air inlet of the lower ejector nitrogen cylinder is connected to a lower compressed air collection block via an air pipe. The lower compressed air collection block is mounted on the lower mold frame and connected to an air source via a lower air inlet valve, thus ensuring that the pressure of each lower ejector nitrogen cylinder connected to the same pressure gauge remains consistent.

[0008] Preferably, the upper heat exchange channel includes an upper tube hole one disposed in the upper fixed insert and an upper tube hole two disposed in the upper movable insert. The upper tube hole one and the upper tube hole two are independent pipes, and their corresponding liquid inlets and outlets are respectively connected to the upper liquid inlet collection block and the upper liquid outlet collection block through independent upper flexible pipes.

[0009] Preferably, the upper fixing insert is connected to the upper mounting surface 1, upper mounting surface 2, upper mounting surface 3, or upper mounting surface 4 by bolts. Each set of upper fixing inserts is composed of multiple sets of upper unit fixing inserts assembled and fixed by screws. Therefore, when local wear and damage occurs, only the corresponding parts need to be replaced, which saves maintenance costs. In order to ensure the accurate and rapid positioning of each set of upper unit fixing inserts on the corresponding mounting surface, upper mounting surface 1, upper mounting surface 2, upper mounting surface 3, and upper mounting surface 4 are also designed with upper positioning blocks that can quickly position each set of upper unit fixing inserts. The periphery of upper mounting surface 1, upper mounting surface 2, upper mounting surface 3, and upper mounting surface 4 is also provided with upper fixing blocks for quickly limiting and fixing the assembled upper inserts 1, upper insert 2, upper insert 3, and upper insert 4. Upper docking holes are also provided between two adjacent sets of upper unit fixing inserts, which form upper pipe holes 1 after docking.

[0010] Preferably, an upper mating sealing ring is also provided between the upper mating holes to achieve a mating seal.

[0011] Preferably, the lower heat exchange channel includes a lower tube hole one disposed in the lower fixed insert and a lower tube hole two disposed in the lower movable insert. The lower tube hole one and the lower tube hole two are independent pipes, and their corresponding liquid inlets and outlets are respectively connected to the lower liquid inlet collection block and the lower liquid outlet collection block through independent lower flexible pipes.

[0012] Preferably, the lower fixing insert is positioned and connected to the lower mounting surface 1, lower mounting surface 2, lower mounting surface 3, or lower mounting surface 4 by bolts. Each set of lower fixing inserts is composed of multiple sets of lower unit fixing inserts assembled and fixed by screws. Therefore, when local wear and damage occurs, only the corresponding parts need to be replaced, which saves maintenance costs. In order to ensure the accurate and rapid positioning of each set of lower unit fixing inserts under the corresponding mounting surface, lower positioning blocks that can quickly position each set of lower unit fixing inserts can be designed under the lower mounting surface 1, lower mounting surface 2, lower mounting surface 3, and lower mounting surface 4. Lower fixing blocks are also provided around the lower mounting surface 1, lower mounting surface 2, lower mounting surface 3, and lower mounting surface 4 to quickly limit and fix the assembled lower inserts 1, lower inserts 2, lower inserts 3, and lower inserts 4. Lower docking holes are also provided between two adjacent sets of lower unit fixing inserts, which form lower pipe holes 1 after docking.

[0013] Preferably, a lower mating sealing ring is also provided between the lower mating holes for achieving a mating seal.

[0014] Preferably, the outer periphery of the lower insert 1, lower insert 2, lower insert 3, and lower insert 4 is also provided with multiple sets of material sheet shape positioning rails for receiving and supporting the material before pressing. The original flat material sheet is placed into the mold after heating, and is leveled and positioned by this structure.

[0015] Preferably, the material sheet positioning rail includes an L-shaped support frame, a support piece, and a support spring. The horizontal support of the support frame is fixed on the lower mold frame, and a set of through slots is opened on its vertical support frame. The support piece is installed in the through slot through a hinge shaft. One end of the support piece is connected to the support spring connected to the support frame, and the other end supports the material sheet by stretching the support spring to perform horizontal material support before pressing.

[0016] The beneficial effects of this invention are as follows: Through a more reasonable combination structure distribution of the automotive anti-collision beam and A-pillar inner panel, this invention can simultaneously complete the one-time hot stamping forming of six product parts—the left front door anti-collision beam, the right front door anti-collision beam, the left rear door anti-collision beam, the right rear door anti-collision beam, the left A-pillar inner panel, and the right A-pillar inner panel—from four sets of original material sheets. Furthermore, the detachable and combinable mold structure, along with the reasonably arranged air and hydraulic pipelines on the upper and lower mold frames, not only ensures more convenient subsequent local maintenance and replacement, but also ensures that the replaced structure can still provide stable and uniform heat exchange and pneumatic effects for the upper and lower molds during the mold closing and stamping process. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the present invention during mold closing;

[0019] Figure 2 This is a schematic diagram of the structure when the upper mold and lower mold of the present invention are separated;

[0020] Figure 3 This is a schematic diagram of the upper mold frame after separating it from upper insert 1, upper insert 2, upper insert 3, and upper insert 4.

[0021] Figure 4 This is a schematic diagram of the structure of upper insert one, upper insert two, upper insert three, and upper inserts in conjunction with the upper ejector nitrogen cylinder;

[0022] Figure 5 This is a schematic diagram showing the distribution of the upper liquid pipeline that connects to the upper heat exchange channel;

[0023] Figure 6 This is a schematic diagram showing the distribution of the gas pipelines and pipes that connect to the upper nitrogen ejection cylinder;

[0024] Figure 7 This is a partial structural diagram of the upper unit fixing inserts of the upper insert two and three parts, which are assembled by screws.

[0025] Figure 8 This is a partial structural diagram of the upper unit fixing insert, which is assembled by screws.

[0026] Figure 9 This is a schematic diagram of the structure after the lower mold frame is separated from lower insert 1, lower insert 2, lower insert 3, and lower insert 4 in the lower mold;

[0027] Figure 10 This is a schematic diagram of the structure of the lower insert one, the lower insert two, and the lower ejector nitrogen cylinder;

[0028] Figure 11 This is a schematic diagram showing the distribution of the lower liquid path pipeline that connects to the lower heat exchange channel;

[0029] Figure 12 This is a schematic diagram of the gas pipeline distribution that connects to the lower nitrogen cylinder.

[0030] Figure 13 This is a partial structural diagram of the lower unit fixing insert assembled with screws;

[0031] Figure 14 This is a schematic diagram of the material sheet shape positioning rail structure;

[0032] The markings in the diagram are as follows: 1 for upper mold frame, 2 for lower mold frame, 3 for identification number one, 4 for identification number two, 5 for material sheet shape positioning rail, 6 for ejector rod, 7 for top plate, 51 for support frame, 52 for support piece, 53 for support spring, and 54 for through groove.

[0033] 11 is the first upper mounting surface, 12 is the second upper mounting surface, 13 is the third upper mounting surface, 14 is the fourth upper mounting surface, 15 is the first upper insert, 16 is the second upper insert, 17 is the third upper insert, 18 is the fourth upper insert, 19 is the upper heat exchange channel, 110 is the upper liquid inlet concentrator, 111 is the upper liquid outlet concentrator, 112 is the upper liquid inlet valve, 113 is the upper liquid outlet valve, 114 is the upper nitrogen ejection cylinder, 115 is the upper compressed air concentrator, 116 is the upper unit fixing insert, 117 is the upper positioning block, 118 is the upper fixing block, 119 is the upper docking hole, and 120 is the upper docking sealing ring.

[0034] 21 is the first lower installation machining surface, 22 is the second lower installation machining surface, 23 is the third lower installation machining surface, 24 is the fourth lower installation machining surface, 25 is the first lower insert, 26 is the second lower insert, 27 is the third lower insert, 28 is the fourth lower insert, 29 is the lower heat exchange channel, 210 is the lower liquid inlet concentrator, 211 is the lower liquid outlet concentrator, 212 is the lower liquid inlet valve, 213 is the lower liquid outlet valve, 214 is the lower ejector nitrogen cylinder, 215 is the lower compressed air concentrator, 216 is the lower unit fixing insert, 217 is the lower positioning block, 218 is the lower fixing block, 219 is the lower docking hole, and 220 is the lower docking sealing ring. Detailed Implementation

[0035] Combination Figures 1 to 14 The composite thermoforming mold for automotive anti-collision beams and A-pillar inner panels shown in this embodiment includes an upper mold frame 1 and a lower mold frame 2.

[0036] The upper mold frame 1 is provided with upper mounting machining surface 11, upper mounting machining surface 2 12, upper mounting machining surface 3 13, and upper mounting machining surface 4 14;

[0037] The lower mold frame 2 is provided with lower mounting machining surface 1 21, lower mounting machining surface 22, lower mounting machining surface 3 23, and lower mounting machining surface 4 24;

[0038] Upper mounting surface 11, upper mounting surface 2, upper mounting surface 3, upper mounting surface 4, and upper mounting surface 4 are respectively detachably positioned and mounted with upper insert 15, upper insert 2, upper insert 3, upper insert 4, and upper insert 4.

[0039] The lower mounting surface 1 21, lower mounting surface 22, lower mounting surface 3 23, lower mounting surface 4 24 are respectively detachably positioned and installed with lower insert 1 25, lower insert 26, lower insert 3 27, lower insert 4 28;

[0040] After the mold is closed, the upper insert 15 and the lower insert 25 are pressed together to form the inner panel of the left A-pillar.

[0041] Upper insert 16 and lower insert 26 are pressed together to form the left front door bumper beam and the right front door bumper beam.

[0042] Upper insert 3.17 and lower insert 3.27 are pressed together to form the left rear door anti-collision beam and the right rear door anti-collision beam.

[0043] Upper insert 4.18 and lower insert 4.28 are pressed together to form the inner panel of the right A-pillar;

[0044] Therefore, when the upper mold 1 moves toward the lower mold 2 and completes one stamping and mold closing operation, the stamping of six products can be completed at one time. The combined distribution forming method of the car anti-collision beam and the A-pillar inner panel, as well as the composite thermoforming mold structure designed for forming the car anti-collision beam and the A-pillar inner panel, can not only improve the processing efficiency of thermoforming, but also ensure that the stamping force of each part of the upper mold 1 and the lower mold 2, which are equipped with four sets of mounting processing surfaces, can be as balanced and uniform as possible to achieve a stable distribution, so as to improve the pass rate of six products when forming them at one time.

[0045] The upper liquid pipeline is installed on the upper mold frame 1, which includes upper heat exchange channels 19 opened in upper insert 15, upper insert 2 16, upper insert 3 17, and upper insert 4 18. The liquid inlet of the upper heat exchange channel 19 is connected to the upper liquid inlet collection block 110 through a pipe, and the liquid outlet of the upper heat exchange channel 19 is connected to the upper liquid outlet collection block 111 through a pipe. The upper liquid inlet collection block 110 and the upper liquid outlet collection block 111 are installed on the upper mold frame 1 and are connected to the heat exchange circulation liquid tank through the upper liquid inlet valve 112 and the upper liquid outlet valve 113.

[0046] The lower liquid pipeline is installed on the lower mold frame 2, which includes a lower heat exchange channel 29 opened in the lower insert 1 25, lower insert 26, lower insert 3 27, and lower insert 4 28. The liquid inlet of the lower heat exchange channel 29 is connected to the lower liquid inlet collection block 210 through a pipe, and the liquid outlet of the lower heat exchange channel 29 is connected to the lower liquid outlet collection block 211 through a pipe. The lower liquid inlet collection block 210 and the lower liquid outlet collection block 211 are installed under the lower mold frame 2 and are connected to the heat exchange circulation liquid tank through the lower liquid inlet valve 212 and the lower liquid outlet valve 213.

[0047] Upper insert 15, upper insert 2 16, upper insert 3 17, and upper insert 4 18 include upper fixed inserts and upper movable inserts driven by upper ejection nitrogen cylinder 114. The air inlet of upper ejection nitrogen cylinder 114 is connected to upper compressed air collection block 115 through an air pipe. Upper compressed air collection block 115 is installed on upper mold frame 1 and connected to air source through upper air inlet valve, thereby ensuring that the pressure of each upper ejection nitrogen cylinder 114 connected to the same pressure gauge is consistent.

[0048] Lower insert 1 25, lower insert 26, lower insert 3 27, and lower insert 4 28 include a lower fixed insert and a lower movable insert driven by a lower ejector nitrogen cylinder 214. The air inlet of the lower ejector nitrogen cylinder 214 is connected to a lower compressed air collection block 215 through an air pipe. The lower compressed air collection block 215 is installed on the lower mold frame 2 and is connected to an air source through a lower air inlet valve, thereby ensuring that the pressure of each lower ejector nitrogen cylinder 214 connected to the same pressure gauge is consistent.

[0049] The upper heat exchange channel 19 includes an upper tube hole 1 disposed in the upper fixed insert and an upper tube hole 2 disposed in the upper movable insert. The upper tube hole 1 and the upper tube hole 2 are independent pipes, and their corresponding liquid inlets and outlets are respectively connected to the upper liquid inlet collection block 110 and the upper liquid outlet collection block 111 through independent upper flexible hose pipes.

[0050] The upper fixed inserts are correspondingly positioned and connected to the upper mounting surface 11, upper mounting surface 212, upper mounting surface 313, or upper mounting surface 414 via bolts. Each set of upper fixed inserts consists of multiple sets of upper unit fixed inserts 116 assembled and fixed with screws. Therefore, when local wear and damage occurs, only the corresponding part needs to be replaced, saving maintenance costs. Furthermore, to ensure accurate and rapid positioning of each set of upper unit fixed inserts 116 on the corresponding mounting surface, upper mounting surface 11, upper mounting surface 213, upper mounting surface 414 can be designed... The upper mounting surface 13 and the upper mounting surface 14 are also provided with upper positioning blocks 117 that can quickly position each set of upper unit fixing inserts 116. The upper mounting surface 11, the upper mounting surface 22, the upper mounting surface 33, and the upper mounting surface 4 are also provided with upper fixing blocks 118 around them to quickly limit and fix the combined upper inserts 15, 16, 17, and 18. The upper docking holes 119 are also provided between two adjacent sets of upper unit fixing inserts 116. After the upper docking holes 119 are docked, they form the upper pipe hole 1.

[0051] An upper mating sealing ring 120 is also provided between the upper mating holes 119 for achieving a mating seal. And as... Figure 7 , 8 In order to show the connection relationship of each upper unit fixed insert, some upper unit fixed inserts are omitted from the figure.

[0052] The lower heat exchange channel 29 includes a lower tube hole 1 disposed in the lower fixed insert and a lower tube hole 2 disposed in the lower movable insert. The lower tube hole 1 and the lower tube hole 2 are independent pipes, and their corresponding liquid inlets and outlets are respectively connected to the lower liquid inlet collection block 210 and the lower liquid outlet collection block 211 through independent lower flexible hose pipes.

[0053] The lower fixed inserts are correspondingly positioned and connected to the lower mounting surface 1 21, lower mounting surface 22, lower mounting surface 3 23, or lower mounting surface 4 24 via bolts. Each set of lower fixed inserts consists of multiple sets of lower unit fixed inserts 216 assembled and fixed with screws. Therefore, when local wear and damage occurs, only the corresponding parts need to be replaced, saving maintenance costs. Furthermore, to ensure accurate and rapid positioning of each set of lower unit fixed inserts 216 on the corresponding mounting surface, the lower mounting surface 1 21, lower mounting surface 22, lower mounting surface 23, and lower mounting surface 4 24 can be designed... The lower mounting surface 23 and the lower mounting surface 24 are also provided with a lower positioning block 217 that can quickly position each set of lower unit fixing inserts 216. The lower mounting surface 21, the lower mounting surface 22, the lower mounting surface 23, and the lower mounting surface 24 are also provided with a lower fixing block 218 for quickly limiting and fixing the combined lower inserts 25, 26, 27, and 28. The lower docking holes 219 are also provided between two adjacent sets of lower unit fixing inserts 216. After the lower docking holes 219 are docked, they form the lower pipe hole 1.

[0054] A lower mating sealing ring 220 is also provided between the lower mating holes 219 for achieving mating sealing.

[0055] Furthermore, in order to enable rapid assembly and positioning of each upper and lower insert, identification numbers 1-3 corresponding to the left A-pillar inner panel, left front door anti-collision beam, right front door anti-collision beam, left rear door anti-collision beam, right rear door anti-collision beam, and right A-pillar inner panel can be marked on the upper mold frame 1 and lower mold frame 2. At the same time, identification numbers 2-4 corresponding to the positions of the upper unit fixing insert 116 and lower unit fixing insert 216 are also set on the periphery of each set of upper and lower installation processing surfaces. Thus, when assembling and connecting the upper insert 15, upper insert 26, upper insert 37, upper insert 418, lower insert 125, lower insert 26, lower insert 327, and lower insert 428, as well as when positioning and fixing them on the corresponding installation processing surfaces, direct alignment and installation can be carried out more conveniently, saving time and effort.

[0056] The outer periphery of the lower insert 1 25, lower insert 26, lower insert 3 27, and lower insert 4 28 is also provided with multiple sets of material sheet shape positioning rails 5 for receiving and supporting the material before pressing. The original flat material sheet is placed into the mold after heating, and is leveled and positioned by this structure.

[0057] The material sheet positioning rail includes an L-shaped support frame 51, a support piece 52, and a support spring 53. The horizontal support of the support frame 51 is fixed on the lower mold frame 2, and a set of through slots 54 are opened on its vertical support. The support piece 52 is installed in the through slot 54 through a hinge shaft. One end of the support piece is connected to the support spring 53 connected to the support frame 51, and the other end supports the material sheet by stretching the support spring 53 to perform horizontal material support before pressing. Due to the slanted design at the top of the support frame and the design of the support spring, it not only has a certain correction effect when supporting the material, but also has a flexible material support effect.

[0058] As shown in the figure, in order to facilitate unloading after mold closing, ejector pins 6 and ejector plates 7 are provided to eject the molded product and separate it from the upper mold base 1 and lower mold base 2, and to facilitate unloading by the grippers. This part is existing technology and will not be described in detail.

[0059] The working principle of this invention is as follows: During mold closing, firstly, the conveyor transports four sets of material sheets, which are then gripped by the grippers and placed onto the material sheet shape positioning rail, where they are supported and positioned. Then, the upper mold frame 1 descends under the drive of the pressure cylinder and simultaneously presses down. The upper liquid pipeline transports coolant, which can cool the heat transferred to the corresponding inserts during the stamping process in a timely manner, preventing bursting. In this invention, the air and liquid pipelines ensure better uniform and rapid heat conduction, while also ensuring the uniform and stable supply of air pressure. This further reduces the probability of defective stamping and improves the overall stable stamping effect after assembly.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite thermoforming mold for automotive anti-collision beams and A-pillar inner panels, characterized in that, Including the upper die frame (1), the lower die frame (2); The upper die frame (1) is provided with upper installation processing surface one (11), upper installation processing surface two (12), upper installation processing surface three (13), upper installation processing surface four (14); The lower die frame (2) is provided with lower installation processing surface one (21), lower installation processing surface two (22), lower installation processing surface three (23), lower installation processing surface four (24); Upper installation processing surface one (11), upper installation processing surface two (12), upper installation processing surface three (13), upper installation processing surface four (14) correspond detachable positioning installation upper insert block one (15), upper insert block two (16), upper insert block three (17), upper insert block four (18); Lower installation processing surface one (21), lower installation processing surface two (22), lower installation processing surface three (23), lower installation processing surface four (24) correspond detachable positioning installation lower insert block one (25), lower insert block two (26), lower insert block three (27), lower insert block four (28); After clamping, upper insert block one (15) and lower insert block one (25) correspond and are pressed together for forming left A column inner plate, Upper insert block two (16) and lower insert block two (26) correspond and are pressed together for forming left front door anti-collision beam and right front door anti-collision beam, Upper insert block three (17) and lower insert block three (27) correspond and are pressed together for forming left rear door anti-collision beam and right rear door anti-collision beam, Upper insert block four (18) and lower insert block four (28) correspond and are pressed together for forming right A column inner plate; The upper liquid path pipeline is installed on the upper die frame (1), which includes upper heat exchange channels (19) opened in the upper insert block one (15), the upper insert block two (16), the upper insert block three (17), the upper insert block four (18), the liquid inlet of the upper heat exchange channel (19) is connected with the upper liquid inlet collecting block (110) through a pipeline, the liquid outlet of the upper heat exchange channel (19) is connected with the upper liquid outlet collecting block (111) through a pipeline, the upper liquid inlet collecting block (110) and the upper liquid outlet collecting block (111) are installed on the upper die frame (1), and are connected with the heat exchange circulating liquid tank through the upper liquid inlet valve (112) and the upper liquid outlet valve (113); The lower liquid path pipeline is installed on the lower die frame (2), which includes lower heat exchange channels (29) opened in the lower insert block one (25), the lower insert block two (26), the lower insert block three (27), the lower insert block four (28), the liquid inlet of the lower heat exchange channel (29) is connected with the lower liquid inlet collecting block (210) through a pipeline, the liquid outlet of the lower heat exchange channel (29) is connected with the lower liquid outlet collecting block (211) through a pipeline, the lower liquid inlet collecting block (210) and the lower liquid outlet collecting block (211) are installed on the lower die frame (2), and are connected with the heat exchange circulating liquid tank through the lower liquid inlet valve (212) and the lower liquid outlet valve (213). The upper insert block one (15), upper insert block two (16), upper insert block three (17), upper insert block four (18) include upper fixed insert block and upper movable insert block driven by upper ejection nitrogen cylinder (114), and the gas inlet of upper ejection nitrogen cylinder (114) is connected with upper gas collecting block (115) through air pipe, the upper gas collecting block (115) is installed on the upper die holder (1), and is connected with gas source through upper air inlet valve; The lower insert block one (25), lower insert block two (26), lower insert block three (27), lower insert block four (28) include lower fixed insert block and lower movable insert block driven by lower ejection nitrogen cylinder (214), and the gas inlet of lower ejection nitrogen cylinder (214) is connected with lower gas collecting block (215) through air pipe, the lower gas collecting block (215) is installed on the lower die holder (2), and is connected with gas source through lower air inlet valve; The upper heat exchange hole (19) includes upper pipe hole one arranged in the upper fixed insert block and upper pipe hole two arranged in the upper movable insert block, the upper pipe hole one and the upper pipe hole two are independent pipes, and the corresponding liquid inlet and liquid outlet are connected with upper liquid inlet collecting block (110) and upper liquid outlet collecting block (111) through independent upper hose pipes respectively; The lower heat exchange hole (29) includes lower pipe hole one arranged in the lower fixed insert block and lower pipe hole two arranged in the lower movable insert block, the lower pipe hole one and the lower pipe hole two are independent pipes, and the corresponding liquid inlet and liquid outlet are connected with lower liquid inlet collecting block (210) and lower liquid outlet collecting block (211) through independent lower hose pipes respectively; The lower insert block one (25), lower insert block two (26), lower insert block three (27), lower insert block four (28) are further provided with a plurality of material sheet shape positioning rails (5) for supporting material before pressing; The material sheet shape positioning rail includes L-shaped support frame body (51), supporting piece (52) and supporting spring (53), the horizontal support of the support frame body (51) is fixed on the lower die holder (2), a group of through grooves (54) are formed in the vertical stand of the support frame body (51), the supporting piece (52) is installed in the through groove (54) through hinge shaft, one end of the supporting piece (52) is connected with the supporting spring (53) connected with the support frame body (51), and the other end supports the material sheet by stretching the supporting spring (53) to support the material before pressing.

2. The composite hot-stamping die for an automobile bumper beam and A-pillar inner panel according to claim 1, characterized by The upper fixed insert block is connected on the upper installation machining surface one (11), upper installation machining surface two (12), upper installation machining surface three (13) or upper installation machining surface four (14) through corresponding positioning connection of bolts, and each group of upper fixed insert blocks is fixed by a plurality of upper unit fixed insert blocks (116) through screw splicing and combination, the upper installation machining surface one (11), upper installation machining surface two (12), upper installation machining surface three (13), upper installation machining surface four (14) are further provided with upper positioning blocks (117) capable of quickly positioning each group of upper unit fixed insert blocks (116), and upper butt joints (119) are further provided between two adjacent groups of upper unit fixed insert blocks (116), the upper butt joints (119) form upper pipe hole one after butt joint.

3. The composite hot-stamping die for an automobile bumper beam and A-pillar inner panel according to claim 2, characterized by The upper butt joint holes (119) are further provided with upper butt joint sealing rings (120) for butt joint sealing.

4. The composite hot-stamping die for an automobile bumper beam and A-pillar inner panel according to claim 1, characterized by The lower fixed inserts are correspondingly positioned and connected on the lower installation machining surface one (21), the lower installation machining surface two (22), the lower installation machining surface three (23) or the lower installation machining surface four (24) through bolts, and each group of lower fixed inserts is fixed by a plurality of groups of lower unit fixed inserts (216) through screw splicing and combination, the lower installation machining surface one (21), the lower installation machining surface two (22), the lower installation machining surface three (23), the lower installation machining surface four (24) are further provided with lower positioning blocks (217) capable of quickly positioning each group of lower unit fixed inserts (216), and lower butt joint holes (219) are further provided between the two adjacent groups of lower unit fixed inserts (216), and the lower butt joint holes (219) form a lower pipe hole one after butt joint.

5. The composite hot-stamping die for an automobile bumper beam and A-pillar inner panel according to claim 4, characterized by The lower butt joint holes (219) are further provided with lower butt joint sealing rings (220) for butt joint sealing.

Images