Underfloor panel thermoforming die

Abstract

The utility model relates to mould technical field especially is bottom guard board thermoforming mould, including lower die holder, lower backing plate, lower forming public, upper die holder, punch driver, mounting seat, upper backing plate and upper forming public, mounting seat is equipped with punch via clamping plate entry son, clamping plate entry son can adjust the horizontal position of punch on the bottom surface of mounting seat, upper backing plate is equipped with the embedded hole and the bushing, the bushing can adjust the horizontal position in the embedded hole, the bushing is equipped with the center hole, upper forming public is equipped with the upper via hole, punch can slide and penetrate the center hole and the upper via hole, lower forming public is equipped with mounting hole and knife edge entry son, knife edge entry son can adjust the horizontal position in mounting hole, knife edge entry son is equipped with forming hole, lower backing plate and lower die holder all are equipped with the blanking hole of coaxial intercommunication. The application completes the forming and punching of bottom guard plate in the same station, and can adjust the horizontal position of punch, clamping plate entry son, bushing and knife edge entry son, to ensure the position degree accuracy of punching, reduces the cost and time of modifying mould.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to thermoforming molds for finger bottom guards. Background Technology

[0002] The underbody protection plate is a very important barrier to protect the battery pack of electric vehicles. Compared with the 1.2mm thick high-strength plate (Rm=590-630MPa) required for cold stamping, the thermoformed underbody protection plate with a thickness of 0.6-0.8mm currently in use can save 40% of the material weight and achieve higher strength (Rm=1380-1600MPa).

[0003] The existing thermoforming process for bottom plates mainly consists of three production steps: ① 2D planar laser engraving, ② thermoforming, and ③ 3D laser engraving. In the ① 2D planar laser engraving step, the raw material needs to be laser-processed with a 2D planar laser engraving machine to add a circular hole for positioning in the ③ 3D laser engraving step. In the thermoforming step, due to the thermal expansion and contraction characteristics of the thermoformed workpiece during hot stamping, the position of the circular hole after laser forming may shift, making it difficult to guarantee the product's pass rate.

[0004] Therefore, the defects are very obvious, and a solution is urgently needed. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a thermoforming mold for bottom guard plate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bottom guard plate thermoforming mold includes a lower mold base, a lower backing plate mounted on the lower mold base, a lower forming die mounted on the lower backing plate, an upper mold base that is lifted and positioned above the lower mold base, a punching driver mounted on the upper mold base, a mounting base mounted on the drive end of the punching driver, an upper backing plate mounted on the upper mold base, and an upper forming die mounted on the upper backing plate and engaging with the lower forming die. A lifting space is provided between the upper mold base and the upper backing plate. The mounting base is lifted and positioned within the lifting space. A punch is mounted on the mounting base via a clamping insert. The clamping insert can adjust the horizontal position of the punch on the bottom surface of the mounting base. The upper backing plate has an insert hole in which a bushing is installed. The bushing can be adjusted horizontally within the mounting hole. The bushing has a center hole. The upper forming die has an upper through hole with a diameter larger than that of the punch. The punch can slide through the center hole and the upper through hole. The top surface of the lower forming die has a recessed mounting hole with a cutting edge insert installed inside. The cutting edge insert can be adjusted horizontally within the mounting hole. The cutting edge insert has a forming hole. The lower backing plate and the lower die base both have coaxially connected blanking holes. The forming hole and the blanking hole are connected, and the punch can be inserted into the forming hole. The punch, center hole, and forming hole are coaxially arranged. The displacement of the punch, clamping insert, bushing, and cutting edge insert in adjusting horizontal position is equal.

[0008] Furthermore, the clamp insert is secured to the mounting base via a first locking fastener.

[0009] Furthermore, the clamp insert is provided with a first adjustment hole, the mounting base is provided with a first threaded hole communicating with the first adjustment hole, the first locking device is a first locking bolt, and the stud of the first locking bolt passes through the first adjustment hole and is threadedly connected to the first threaded hole.

[0010] Furthermore, the bushing is secured to the upper pad by a second fastener.

[0011] Furthermore, the bushing is provided with a second adjustment hole, the upper pad is provided with a second threaded hole communicating with the second adjustment hole, and the second locking device is a second locking bolt, the stud of the second locking bolt passes through the second adjustment hole and is threadedly connected to the second threaded hole.

[0012] Furthermore, the cutting edge insert is secured to the lower forming male via a third locking fastener.

[0013] Furthermore, the lower forming die is provided with a third adjustment hole, the cutting edge insert is provided with a third threaded hole that communicates with the third adjustment hole, and the third locking fastener is a third locking bolt, the stud of the third locking bolt passes through the third adjustment hole and is threadedly connected to the third threaded hole.

[0014] Furthermore, the bottom surface of the mounting base is recessed with an assembly hole, the clamp insert is located in the assembly hole, and the gap between the inner wall of the assembly hole and the side of the clamp insert is filled with filler.

[0015] Furthermore, the gap between the inner wall of the mounting hole and the side of the bushing is filled with a filler.

[0016] Furthermore, the gap between the inner wall of the mounting hole and the side of the blade insert is filled with a filler.

[0017] The beneficial effects of this utility model are as follows: In practical applications, the thermoformed workpiece is placed on the lower forming die, the upper and lower die bases are closed, and the upper and lower forming dies cooperate to stamp the workpiece. Simultaneously, the punching driver drives the mounting base, along with the punch, to move downwards, allowing the punch to penetrate the upper through-hole and insert into the forming hole of the cutting edge insert, thus cutting a through-hole on the workpiece. The waste material cut from the workpiece is discharged through the blanking hole. Due to the thermal expansion and contraction characteristics of the thermoformed workpiece, the position of the through-hole will shift when the thermoformed workpiece cools to room temperature. Therefore, the horizontal position offset of the clamping insert, bushing, and cutting edge insert can be adjusted according to the shift of the through-hole position, ensuring that even after thermal expansion and contraction, the position of the through-hole on the thermoformed workpiece remains within acceptable limits. This application completes the forming and punching of thermoformed workpieces in the same station, simplifying the production process (saving the 2D planar laser engraving process). It can also adjust the horizontal position of the punch, clamping plate insert, bushing, and cutting edge insert according to the hole position offset caused by the thermal expansion and contraction of the thermoformed workpiece, so as to ensure the accuracy of the position of the through hole on the thermoformed workpiece after stamping and punching, thereby ensuring the quality of the thermoformed workpiece, reducing the cost and time of mold modification, and improving production efficiency and quality. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Lower die holder; 2. Lower backing plate; 3. Lower forming die; 4. Upper die holder; 5. Punch driver; 6. Mounting base; 7. Upper backing plate; 8. Upper forming die; 9. Lifting space; 10. Clamping plate insert; 11. Punch; 12. Insertion hole; 13. Center hole; 14. Upper through hole; 15. Mounting hole; 16. Cutting edge insert; 17. Forming hole; 18. Blanking hole; 19. First locking fastener; 20. Second locking fastener; 21. Third locking fastener; 22. Assembly hole; 23. Bottom guard plate; 24. Bushing. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0022] like Figure 1As shown, the thermoforming mold for the bottom guard plate provided by this utility model includes a lower mold base 1, a lower pad 2 mounted on the lower mold base 1, a lower forming male 3 mounted on the lower pad 2, an upper mold base 4 that is lifted and disposed above the lower mold base 1, a punching driver 5 mounted on the upper mold base 4, a mounting base 6 mounted on the driving end of the punching driver 5, an upper pad 7 mounted on the upper mold base 4, and an upper forming male 8 mounted on the upper pad 7 and engaging with the lower forming male 3. A lifting space 9 is provided between the upper mold base 4 and the upper pad 7. The mounting base 6 is lifted and disposed in the lifting space 9. A punch 11 is mounted on the mounting base 6 via a clamping insert 10. The clamping insert 10 can adjust the horizontal position of the punch 11 on the bottom surface of the mounting base 6. The upper pad 7 is provided with an inserting hole 12. A bushing 24 is installed in the inserting hole 12. The bushing 24 can adjust its horizontal position within the inserting hole 12. The punch 11 is provided with a center hole 13 and an upper through hole 14. The diameters of both the center hole 13 and the upper through hole 14 are larger than the diameter of the punch 11. The punch 11 can slide through the center hole 13 and the upper through hole 14. The top surface of the lower forming die 3 is recessed with a mounting hole 15. A cutting edge insert 16 is installed in the mounting hole 15. The cutting edge insert 16 can be adjusted horizontally within the mounting hole 15. The cutting edge insert 16 has a forming hole 17. The lower pad 2 and the lower die base 1 both have coaxially connected blanking holes 18. The forming hole 17 is connected to the blanking hole 18. The diameters of both the blanking hole 18 and the forming hole 17 are larger than the diameter of the punch 11. The punch 11 can be inserted into the forming hole 17. The punch 11, the center hole 13, and the forming hole 17 are coaxially arranged. The displacement of the punch 11, the clamping insert 10, the bushing 24, and the cutting edge insert 16 in adjusting their horizontal positions are equal.

[0023] In practical applications, the thermoformed workpiece (bottom guard plate 23) is placed on the lower forming die 3. The upper die holder 4 and the lower die holder 1 are closed, and the upper forming die 8 and the lower forming die 3 cooperate to stamp the workpiece. At the same time, the punching driver 5 drives the mounting base 6 to move the punch 11 downward, so that the punch 11 passes through the upper through hole 14 and inserts into the forming hole 17 of the cutting edge insert 16 to cut and form a through hole on the thermoformed workpiece. The waste material cut off from the thermoformed workpiece is discharged through the blanking hole 18. Due to the thermal expansion and contraction characteristics of the thermoformed workpiece, the position of the through hole will shift when the thermoformed workpiece cools to room temperature. Therefore, the horizontal position offset of the clamping plate insert 10, bushing 24 and cutting edge insert 16 can be adjusted according to the position offset of the through hole, so that even if the thermoformed workpiece expands and contracts after stamping and punching, the position of the through hole on the thermoformed workpiece is qualified. This application completes the forming and punching of thermoformed workpieces in the same station, simplifying the production process (saving the 2D planar laser engraving process). Furthermore, it can adjust the horizontal positions of the punch 11, clamping plate insert 10, bushing 24, and cutting edge insert 16 according to the hole position offset caused by the thermal expansion and contraction of the thermoformed workpiece. This ensures the accurate positioning of the through holes on the thermoformed workpiece after stamping and punching, thereby guaranteeing the quality of the thermoformed workpiece, reducing the cost and time of mold modification, and improving production efficiency and quality. This utility model is particularly suitable for the hot stamping forming of bottom guard plates 23 with a material thickness of 0.6-0.8mm.

[0024] Specifically, the punching actuator 5 can be a hydraulic cylinder. In practical applications, based on the relationship between the hole diameter circumference and the fixed tensile strength (e.g., 1250 MPa), the punching force is calculated using the thermoforming punching and trimming force calculation method (existing calculation methods can be used). A matching hydraulic cylinder is selected, and the hydraulic cylinder driving force needs to be twice as large as the calculated punching force. The hydraulic cylinder is connected to a controller to control the start / end time of the hydraulic cylinder punching, and can also control the magnitude of the hydraulic cylinder driving force.

[0025] In this embodiment, the clamping insert 10 is locked to the mounting base 6 via the first locking fastener 19. This structural design not only ensures that the clamping insert 10 is securely mounted on the mounting base 6, but also facilitates adjustment of the horizontal position of the clamping insert 10 on the mounting base 6.

[0026] In this embodiment, the clamping plate insert 10 is provided with a first adjustment hole, and the mounting base 6 is provided with a first threaded hole communicating with the first adjustment hole. The first locking fastener 19 is a first locking bolt, and the stud of the first locking bolt passes through the first adjustment hole and is threadedly connected to the first threaded hole. In practical applications, when it is necessary to adjust the horizontal position of the clamping plate insert 10 and the punch 11, the first locking bolt is loosened, and the clamping plate insert 10 and the punch 11 are adjusted horizontally relative to the mounting base 6. After the adjustment is completed, the first locking bolt is tightened to lock the clamping plate insert 10 onto the mounting base 6.

[0027] In this embodiment, the bushing 24 is locked to the upper pad 7 via the second fastener 20. This structural design not only ensures that the bushing 24 is securely mounted on the upper pad 7, but also facilitates adjustment of the horizontal position of the bushing 24 on the upper pad 7.

[0028] In this embodiment, the bushing 24 is provided with a second adjustment hole, and the upper pad 7 is provided with a second threaded hole communicating with the second adjustment hole. The second locking fastener 20 is a second locking bolt, and the stud of the second locking bolt passes through the second adjustment hole and is threadedly connected to the second threaded hole. In practical applications, when it is necessary to adjust the horizontal position of the bushing 24, the second locking bolt is loosened, and the bushing 24 is adjusted horizontally relative to the upper pad 7. After adjustment, the second locking bolt is tightened to lock the bushing 24 onto the upper pad 7.

[0029] In this embodiment, the cutting edge insert 16 is secured to the lower forming male 3 via the third locking fastener 21. This structural design not only ensures that the cutting edge insert 16 is securely installed on the lower forming male 3, but also facilitates adjustment of the horizontal position of the cutting edge insert 16 on the lower forming male 3.

[0030] In this embodiment, the lower forming male 3 is provided with a third adjustment hole, and the cutting edge insert 16 is provided with a third threaded hole communicating with the third adjustment hole. The third locking fastener 21 is a third locking bolt, and the stud of the third locking bolt passes through the third adjustment hole and is threadedly connected to the third threaded hole. In practical applications, when it is necessary to adjust the horizontal position of the cutting edge insert 16, the third locking bolt is loosened, and the cutting edge insert 16 is adjusted horizontally relative to the lower forming male 3. After adjustment, the third locking bolt is tightened to lock the cutting edge insert 16 onto the lower forming male 3.

[0031] In this embodiment, the bottom surface of the mounting base 6 is recessed with an assembly hole 22. The clamping plate insert 10 is located within the assembly hole 22, and the gap between the inner wall of the assembly hole 22 and the side of the clamping plate insert 10 is filled with a filler. In practical applications, based on the hole position offset and offset direction caused by the thermal expansion and contraction of the thermoformed workpiece, the operator grinds the corresponding side of the clamping plate insert 10. The amount of grinding is equal to the hole position offset. After grinding, the ground surface of the clamping plate insert 10 is in close contact with the inner wall of the assembly hole 22, thus completing the adjustment of the horizontal position of the clamping plate insert 10. Then, the filler is filled into the gap between the inner wall of the assembly hole 22 and the side of the clamping plate insert 10 to improve the stability of the clamping plate insert 10 mounted on the mounting base 6. Specifically, the filler can be solder, which is used to weld the mounting base 6 and the clamping plate insert 10 together.

[0032] In this embodiment, the gap between the inner wall of the mounting hole 12 and the side of the bushing 24 is filled with filler. In practical applications, based on the hole position offset and offset direction caused by the thermal expansion and contraction of the thermoformed workpiece, the operator grinds the corresponding side of the bushing 24. The amount of grinding is equal to the hole position offset. After grinding, the ground surface of the bushing 24 is in close contact with the inner wall of the mounting hole 12, thus completing the adjustment of the horizontal position of the bushing 24. Then, filler is filled into the gap between the inner wall of the mounting hole 12 and the side of the bushing 24 to improve the stability of the bushing 24 mounted on the upper pad 7. Specifically, the filler can be solder, which is used to weld the bushing 24 and the upper pad 7 together.

[0033] In this embodiment, the gap between the inner wall of the mounting hole 15 and the side of the cutting edge insert 16 is filled with a filler. In practical applications, based on the hole position offset and offset direction caused by the thermal expansion and contraction of the thermoformed workpiece, the operator grinds the corresponding side of the cutting edge insert 16. The amount of grinding is equal to the hole position offset. After grinding, the ground surface of the cutting edge insert 16 is in close contact with the inner wall of the mounting hole 15, thus completing the adjustment of the horizontal position of the cutting edge insert 16. Then, the filler is filled into the gap between the inner wall of the mounting hole 15 and the side of the cutting edge insert 16 to improve the stability of the cutting edge insert 16 installed on the lower forming male 3. Specifically, the filler can be solder, which is used to weld the cutting edge insert 16 and the lower forming male 3 together.

[0034] All technical features in this embodiment can be freely combined according to actual needs.

[0035] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A thermoforming mold for a bottom protective plate, characterized in that: The assembly includes a lower die base (1), a lower backing plate (2) mounted on the lower die base (1), a lower forming male (3) mounted on the lower backing plate (2), an upper die base (4) vertically mounted above the lower die base (1), a punching driver (5) mounted on the upper die base (4), a mounting base (6) mounted on the drive end of the punching driver (5), an upper backing plate (7) mounted on the upper die base (4), and an upper forming male (8) mounted on the upper backing plate (7) and engaging with the lower forming male (3). A lifting space (9) is provided between the mold base (4) and the upper pad (7). The mounting base (6) is lifted and positioned in the lifting space (9). The mounting base (6) is equipped with a punch (11) via a clamping insert (10). The clamping insert (10) can adjust the horizontal position of the punch (11) on the bottom surface of the mounting base (6). The upper pad (7) is provided with an insert hole (12). A bushing (24) is installed in the insert hole (12). The bushing (24) can be adjusted within the insert hole (12). In the horizontal position, the bushing (24) is provided with a center hole (13), the upper forming male (8) is provided with an upper through hole (14), the diameter of the upper through hole (14) is larger than the diameter of the punch (11), the punch (11) can slide through the center hole (13) and the upper through hole (14), the top surface of the lower forming male (3) is recessed with a mounting hole (15), a knife-edge insert (16) is installed in the mounting hole (15), the knife-edge insert (16) can adjust the horizontal position in the mounting hole (15). The cutting edge insert (16) has a forming hole (17), and the lower pad (2) and the lower die base (1) both have coaxially connected blanking holes (18). The forming hole (17) is connected to the blanking hole (18), and the punch (11) can be inserted into the forming hole (17). The punch (11), the center hole (13) and the forming hole (17) are coaxially arranged. The horizontal position adjustment displacement of the punch (11), the clamping plate insert (10), the bushing (24) and the cutting edge insert (16) is equal.

2. The bottom guard plate thermoforming mold according to claim 1, characterized in that: The clamp insert (10) is secured to the mounting base (6) via the first locking fastener (19).

3. The bottom guard plate thermoforming mold according to claim 2, characterized in that: The clamp insert (10) is provided with a first adjustment hole, the mounting base (6) is provided with a first threaded hole that communicates with the first adjustment hole, the first locking fastener (19) is a first locking bolt, and the stud of the first locking bolt passes through the first adjustment hole and is threadedly connected to the first threaded hole.

4. The bottom guard plate thermoforming mold according to claim 1, characterized in that: The bushing (24) is secured to the upper pad (7) via the second fastener (20).

5. The bottom guard plate thermoforming mold according to claim 4, characterized in that: The bushing (24) is provided with a second adjustment hole, the upper pad (7) is provided with a second threaded hole that communicates with the second adjustment hole, the second locking fastener (20) is a second locking bolt, and the stud of the second locking bolt passes through the second adjustment hole and is threadedly connected to the second threaded hole.

6. The bottom guard plate thermoforming mold according to claim 1, characterized in that: The cutting insert (16) is locked onto the lower forming male (3) via the third locking fastener (21).

7. The bottom guard plate thermoforming mold according to claim 6, characterized in that: The lower forming part (3) is provided with a third adjustment hole, the knife-edge insert (16) is provided with a third threaded hole that communicates with the third adjustment hole, the third locking part (21) is a third locking bolt, and the stud of the third locking bolt passes through the third adjustment hole and is threadedly connected to the third threaded hole.

8. The bottom guard plate thermoforming mold according to claim 1, characterized in that: The bottom surface of the mounting base (6) is recessed with an assembly hole (22), and the clamp insert (10) is located inside the assembly hole (22). The gap between the inner wall of the assembly hole (22) and the side of the clamp insert (10) is filled with filler.

9. The bottom guard plate thermoforming mold according to claim 1, characterized in that: The gap between the inner wall of the fitting hole (12) and the side of the bushing (24) is filled with filler.

10. The bottom guard plate thermoforming mold according to claim 1, characterized in that: The gap between the inner wall of the mounting hole (15) and the side of the knife insert (16) is filled with filler.

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