A high-strength steel plate stamping machine for lightweighting of new energy automobile body components

Abstract

The application relates to the stamping technical field and discloses a high-strength steel plate stamping machine for lightweight new energy automobile body parts, which comprises a stamping upper die, a stamping lower die arranged at the bottom of the stamping upper die, a steel plate body arranged between the stamping upper die and the stamping lower die, and a stamping unit arranged in the stamping upper die; the stamping upper die comprises a stamping top plate, a cylinder arranged at the top of the stamping top plate, a sleeve arranged at the bottom of the stamping top plate, a stamping plate arranged at the bottom of the cylinder push rod, and a lower push plate arranged at the bottom of the sleeve. The stamping parts and the expansion parts can improve the bearing capacity of the stamping cutter head during stamping, can vertically and uniformly distribute the stamping force on the cutting edge of the stamping cutter head, can stamp the steel plate body through the expansion block at the bottom and the cutting edge of the stamping cutter head, can enhance the strength of the cutting edge, can reduce the duration of high stress on the cutting edge of the stamping cutter head, can reduce the abrasion, and can prolong the service life of the stamping cutter head.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, and in particular to a high-strength steel plate stamping press for lightweighting of body parts of new energy vehicles. Background Technology

[0002] Currently, countries worldwide are vigorously developing new energy vehicles, and my country has even included them as one of its seven strategic emerging industries. As a crucial component of the vehicle body frame, the automotive reinforcing plate not only bears the responsibility of supporting the body but also plays a vital role in the event of a serious collision. Today, high-strength steel and ultra-high-strength steel have effectively achieved vehicle lightweighting, improving collision strength and safety performance, thus becoming an important development direction for automotive steel. In automobile manufacturing, steel sheet stamping is a common process. To adapt to different body structures and component designs, steel sheets need to undergo various forms of stamping, including punching, stretching, compression, and bending. Punching is one common operation, achieved by drilling holes in the steel sheet. Punching can be done in single-hole or multi-hole form, with different hole diameters and locations selected as needed.

[0003] In existing punching technology, a cylindrical cutter head is often used to punch holes in steel plates. During the punching process, strong friction and shear stress are generated between the cylindrical cutter head and the steel plate, resulting in a large amount of frictional heat and shear deformation on the steel plate surface. The cut surface after punching fractures comes into contact with the sidewall of the punch, causing scraping and generating heat. This causes some material on the fracture surface to adhere to the sidewall of the punch, resulting in a build-up edge. As the build-up edge increases, the punching clearance becomes smaller, producing burrs and a large amount of material chips. On the other hand, the small clearance accelerates the wear of the punch and reduces its service life; at the same time, the increased resistance can easily cause the die or hole to clamp the punch, leading to die accidents or even breakage, resulting in wear and performance degradation of the cutter head, reducing punching quality and efficiency.

[0004] To avoid built-up edge (BUE), existing technologies typically use negative angles on the cutting edge or punch to increase the avoidance zone. During punching, this minimizes the scraping between the material cross-section and the cutting edge, reducing localized high temperatures and shear stress, and preventing changes in the internal structure of the steel plate, thus preventing BUE. However, the larger the negative angle of the cutting edge and punch, the larger the avoidance zone, and the better the scraping can be avoided. But at the same time, the larger the angle, the weaker the cutting edge, and the longer the high stress time on the punch will be. The greater the stress on the punch, the more accelerated the wear will be. Therefore, there is an urgent need for a stamping press that can simultaneously solve the problems of BUE and low cutting edge punching strength. Summary of the Invention

[0005] In view of the problems of existing technology, such as the easy formation of built-up edge and insufficient stamping strength of the cutting head during stamping, which leads to wear of the cutting head, reduced service life and affected stamping quality, a high-strength steel plate stamping machine for lightweighting of new energy vehicle body parts is proposed.

[0006] The purpose is to enhance the stamping strength of the cutting edge of the cutter while avoiding friction between the cutter head and the fracture surface of the steel plate, thereby improving the service life and stamping quality of the cutter head.

[0007] The technical solution of the present invention is a high-strength steel plate stamping machine for lightweighting of new energy vehicle body parts, including an upper stamping die, a lower stamping die disposed at the bottom of the upper stamping die, and a steel plate body disposed between the upper stamping die and the lower stamping die, and also includes a stamping unit disposed inside the upper stamping die; The upper stamping die includes a stamping top plate, a cylinder disposed on the top of the stamping top plate, a sleeve disposed on the bottom of the stamping top plate, a stamping plate disposed on the bottom of the cylinder push rod, and the stamping plate is slidably connected to the inner wall of the bottom of the sleeve, and a lower push plate disposed on the bottom of the sleeve, and the stamping unit is disposed on the bottom of the stamping plate. The stamping unit includes a stamping component disposed at the bottom of the stamping plate, and an extension component arranged in a ring array on the stamping component; the stamping component is used to stamp the steel plate body, and the extension component is used to expand the stamping component during stamping; The stamping component includes a stamping column disposed at the bottom of the stamping plate, a stamping cutter head disposed at the bottom of the stamping plate, a stamping ring disposed at the bottom of the stamping plate and located around the stamping column, and a lower pressure plate disposed at the top of the stamping cutter head.

[0008] Furthermore, the lower stamping die includes a stamping base plate disposed at the bottom of the stamping top plate, a bearing plate disposed at the top of the stamping base plate, a plurality of positioning rods disposed at the top of the bearing plate, and one end of the steel plate body abutting against the plurality of positioning rods, and a support leg disposed at the bottom of the bearing plate.

[0009] Furthermore, the lower stamping die also includes a stamping hole in the middle of the support plate and a blanking hole at the bottom of the stamping hole.

[0010] Furthermore, the stamping column is in the shape of a frustum with a small bottom and a large top, and the top of the stamping column has a movable groove that matches the stamping column.

[0011] Furthermore, the side of the stamping cutter head is inclined, and the diameter of the bottom of the stamping cutter head is larger than the diameter of its top.

[0012] Furthermore, the outer edge of the lower pressure plate should be slightly longer than the outer edge of the stamping ring, and the outer edge of the bottom of the stamping cutter head should be on the same vertical extension line as the midpoint of the cross section on one side of the lower pressure plate.

[0013] Furthermore, the expansion component includes expansion holes arranged in a ring array on the side wall of the stamping cutter head, three expansion blocks arranged from top to bottom within the expansion holes, movable holes arranged in a ring array on the side wall of the stamping column, extrusion holes between two adjacent movable holes, and one side of each of the three expansion blocks being slidably connected to the extrusion hole, limiting plates symmetrically arranged on both sides of the three expansion blocks, three limiting grooves symmetrically opened on both sides of the expansion holes corresponding to horizontal positions, the three limiting plates being slidably arranged within the three limiting grooves, and the length of the three limiting grooves being longer than the length of the three limiting plates, a lifting plate at the bottom of the stamping column, and connecting blocks symmetrically arranged on both sides of the bottom expansion block, and extension grooves symmetrically opened on both sides of the bottom of the expansion hole to match the connecting blocks, with the groove walls of the two extension grooves being parallel.

[0014] Furthermore, the outer edges of the three extension blocks remain on the same vertical extension line, and the bottom of the bottommost extension block is on the same horizontal plane as the bottom of the stamping cutter head.

[0015] Furthermore, a reset component is provided between the stamping component and the extension component; the reset component includes a reset groove opened at the top of the stamping column, and a reset member disposed in the reset groove, and the top of the reset member is fixedly connected to the movable groove.

[0016] Furthermore, the bottom of the side wall of the bottommost extension block is fitted with a stamping slope, and the slope of the stamping slope is the same as the slope of the side of the stamping cutter head. The height of the stamping slope in the vertical direction is greater than the thickness of the steel plate body.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up stamping components and extension components, the load-bearing capacity of the stamping cutter head during stamping can be improved. The stamping force can be vertically and evenly distributed to the cutting edge of the stamping cutter head. The bottom extension block and the cutting edge of the stamping cutter head work together to stamp the steel plate body, which can enhance the strength of the cutting edge, reduce the duration of high stress on the cutting edge of the stamping cutter head, reduce wear, and improve the service life of the stamping cutter head.

[0018] 2. The purpose of the inclined side design of the stamping cutter head is to avoid the side wall of the stamping cutter head rubbing against the fracture surface of the steel plate after stamping during the stamping process. This prevents the fracture surface from scraping against the stamping cutter head, which would cause material on the fracture surface to adhere to the stamping cutter head and form built-up edge. This improves the cleanliness of the stamping cutter head and prevents the built-up edge from affecting subsequent stamping, thereby ensuring the quality of stamping.

[0019] 3. After stamping is completed, the scrap falls directly and the extension block is immediately retracted. While ensuring the stamping strength of the stamping cutter head, it can avoid friction between the stamping cutter head and the fracture surface of the steel plate body, avoid the adhesion of built-up edge, and avoid the generation of stress and heat after the stamping cutter head is rubbed. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a partial cross-sectional bottom view of the structure of the present invention; Figure 3 This is an enlarged structural diagram of point A in section 2 of the present invention; Figure 4 This is an exploded structural diagram of the stamping unit of the present invention; Figure 5 This is a three-dimensional structural diagram of the stamping unit of the present invention; Figure 6 This is a schematic diagram of the overall structure of the stamping component of the present invention; Figure 7 This is a schematic diagram of the overall structure of the extended component of the present invention; Figure 8 This is a partial front cross-sectional view of the stamping ring and lower pressure plate of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B; Figure 10 This is a three-dimensional exploded view of the extension block of the present invention; Figure 11 This is a top view of the stamping unit of the present invention.

[0021] In the picture: 1. Stamping upper die; 11. Stamping top plate; 12. Cylinder; 13. Sleeve; 14. Stamping plate; 15. Lower push plate; 2. Stamping lower die; 21. Stamping bottom plate; 22. Bearing plate; 23. Positioning rod; 24. Stamping hole; 25. Blanking hole; 3. Steel plate body; 4. Stamping component; 41. Stamping column; 42. Stamping cutter head; 43. Stamping ring; 44. Lower pressure plate; 45. Movable groove; 5. Extension component; 51. Extension hole; 52. Extension block; 53. Movable hole; 54. Extrusion hole; 55. Limiting plate; 56. Limiting groove; 57. Lifting plate; 58. Connecting block; 59. Extension groove; 6. Reset component; 61. Reset groove; 62. Reset piece; 7. Stamping inclined surface. Detailed implementation method To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1, referring to Figures 1-6 This invention provides a high-strength steel plate stamping machine for lightweighting body components of new energy vehicles. The machine includes an upper stamping die 1, a lower stamping die 2 installed at the bottom of the upper stamping die 1, and a steel plate body 3 installed between the upper and lower stamping dies 1 and 2. It also includes a stamping unit installed inside the upper stamping die 1. The upper stamping die 1 includes a stamping top plate 11, a cylinder 12 installed at the top of the stamping top plate 11, a sleeve 13 fixedly connected to the bottom of the stamping top plate 11, and a stamping plate 14 fixedly connected to the bottom of the cylinder 12 push rod. The stamping plate 14 is slidably connected to the inner wall of the bottom of the sleeve 13, and a lower stamping plate 14 abutting against the bottom of the sleeve 13. A push plate 15 is provided, and a stamping unit is installed at the bottom of a stamping plate 14. The stamping unit includes a stamping component 4 installed at the bottom of the stamping plate 14, and an extension component 5 arranged in a ring array on the stamping component 4. The stamping component 4 is used to stamp the steel plate body 3, and the extension component 5 is used to extend the stamping component 4 during stamping to improve the stamping bearing capacity of the stamping component 4. The stamping component 4 includes a stamping column 41 fixedly connected to the bottom of the stamping plate 14, a stamping cutter head 42 slidably connected to the bottom of the stamping plate, a stamping ring 43 fixedly connected to the bottom of the stamping plate 14 and located around the stamping column 41, and a lower pressure plate 44 fixedly connected to the top of the stamping cutter head 42.

[0023] Specifically, during stamping, the steel plate body 3 is placed between the upper stamping die 1 and the lower stamping die 2. The cylinder 12 is activated, and the stamping plate 14 is pushed downward through the push rod of the cylinder 12. The stamping plate 14 slides downward in the sleeve 13 and pushes the lower push plate 15 downward. The lower push plate 15 pulls the tension spring set on its top and moves downward together with the stamping plate 14 to stamp the steel plate body 3. During stamping, the stamping plate 14 pushes the stamping column 41, and the stamping column 41 pushes the cutting head downward. When the stamping cutting head 42 contacts the steel plate body 3, the stamping column 41 continues to move downward. When the stamping ring 43 abuts against the lower pressure plate 44, the stamping cutting head 42 begins to stamp the steel plate body 3.

[0024] Reference Figures 1-2 The stamping die 2 includes a stamping base plate 21 installed at the bottom of the stamping top plate 11, a bearing plate 22 fixedly connected to the top of the stamping base plate 21, a plurality of positioning rods 23 fixedly connected to the top of the bearing plate 22, and one end of the steel plate body 3 abutting against the plurality of positioning rods 23, and a support leg fixedly connected to the bottom of the bearing plate 22.

[0025] Specifically, the stamping base plate 21 and the bearing plate 22 are used to support the stamping of the steel plate body 3, and the positioning rod 23 is used to position the steel plate body 3 after it is placed in.

[0026] Reference Figures 1-2 The stamping die 2 also includes a stamping hole 24 in the middle of the support plate 22, and a blanking hole 25 at the bottom of the stamping hole 24.

[0027] Specifically, when the steel plate body 3 is stamped, the waste generated after stamping falls into the stamping hole 24 and is collected from the discharge hole 25.

[0028] Reference Figures 1-6 The stamping column 41 is in the shape of a frustum with a small bottom and a large top, and the top of the stamping column 41 is provided with a movable groove 45 that matches the stamping column 41.

[0029] Specifically, the stamping column 41 is designed to push the extension member 5 when it moves downward, so that the extension member 5 can evenly distribute the stamping force on the stamping head 42, avoid excessive fatigue of the cutting edge at the bottom of the head after long-term stress, and improve the service life of the stamping head 42.

[0030] Reference Figure 4 and Figure 6 The side of the stamping cutter head 42 is inclined, and the diameter of the bottom of the stamping cutter head 42 is larger than the diameter of its top.

[0031] Specifically, the side of the stamping cutter head 42 is designed to be inclined in order to avoid the side wall of the stamping cutter head 42 rubbing against the fracture surface of the steel plate after stamping during the stamping process. This prevents the fracture surface from scraping against the stamping cutter head 42, which would cause the material on the fracture surface to adhere to the stamping cutter head 42 and form built-up edge. This improves the cleanliness of the stamping cutter head 42, prevents the built-up edge from affecting subsequent stamping, and thus ensures the quality of stamping.

[0032] Reference Figures 8-9 The outer edge of the lower pressure plate 44 is slightly longer than the outer edge of the stamping ring 43, and the outer edge of the bottom of the stamping cutter head 42 is on the same vertical extension line as the midpoint of one side section of the lower pressure plate 44.

[0033] Specifically, the outer edge of the lower pressure plate 44 is slightly longer than the outer edge of the stamping ring 43. This ensures the stamping support strength of the lower pressure plate 44, while allowing the stamping force on the lower pressure plate 44 to be symmetrical about the central axis of one side of its cross-section. When the extension component 5 is fully extended, the projection of the side of the extension component 5 in the vertical direction completely coincides with the circle formed by the bottom cutting edge of the stamping cutter head 42. The side of this circle is on the central axis of one side of the cross-section of the lower pressure plate 44 and the stamping ring 43. That is, the stamping pushes the lower pressure plate 44, the lower pressure plate 44 pushes the stamping cutter head 42, and the extension component 5 is fully extended, so that the stamping force on the lower pressure plate 44 can be concentrated symmetrically along the central axis onto the cutting edge of the stamping cutter head 42. This allows the bottom cutting edge of the stamping cutter head 42 to quickly stamp the steel plate body 3, improving stamping efficiency.

[0034] Example 2, refer to Figures 1-7This is the second embodiment of the present invention, which differs from the first embodiment in that: the extension component 5 includes an extension hole 51 arranged in a ring array on the side wall of the stamping head 42, three extension blocks 52 slidably connected in the extension hole 51 and distributed from top to bottom, movable holes 53 arranged in a ring array on the side wall of the stamping column 41, extrusion holes 54 opened between two adjacent movable holes 53, and one side of the three extension blocks 52 is slidably connected to the extrusion hole 54, and limiting plates 55 are symmetrically fixedly connected to both sides of the three extension blocks 52, and three limiting grooves 56 are symmetrically opened on both sides of the extension hole 51 corresponding to the horizontal position. The corresponding sliding connection is in the three limiting grooves 56, and the length of the three limiting grooves 56 is longer than the length of the three limiting plates 55. The lifting plate 57 is detachably connected to the bottom of the stamping column 41, and the two sides of the bottom extension block 52 are symmetrically fixedly connected with connecting blocks 58. The two sides of the bottom of the expansion hole 51 are symmetrically opened with extension grooves 59 that match the connecting blocks 58, and the groove walls of the two extension grooves 59 are parallel. The connecting blocks 58 are slidably connected in the extension grooves 59. The parallel groove walls of the two extension grooves 59 make it easy for the bottom extension block 52 to form a complete circle with the cutting edge of the stamping cutter head 42 when it expands, ensuring the neatness of the stamping edge.

[0035] Specifically, when the stamping column 41 moves downward, it simultaneously presses the three extension blocks 52 through the openings 53 and 54, allowing the three extension blocks 52 to move synchronously towards the edge of the stamping head 42. When the stamping column 41 moves downward and the three extension blocks 52 are fully moved into position and coincide with the cutting edge of the stamping head 42, the stamping ring 43 just abuts against the lower pressure plate 44. The limiting plate 55 serves two purposes: first, to limit the movement of the three extension blocks 52; and second, to reapply the pressure on the extension blocks 52 to the stamping head 42, thus achieving the stamping of the steel plate body 3 by the cutting head. 2 is fan-shaped, and the limiting block is also fan-shaped. During the movement of the limiting block in the limiting groove 56, it will never leave the limiting groove 56, ensuring that the extension block 52 can apply the pressure to the stamping head 42. The three extension blocks 52 can be replaced with a whole shape. The three are set to facilitate subsequent maintenance or replacement. Since the bottom extension block 52 directly stamps the steel plate body after unfolding, its edge is prone to wear or damage. When wear occurs, the lifting plate 57 can be directly disassembled and the bottom extension block 52 can be replaced, avoiding the need to replace the entire extension block 52 and avoiding material waste. When the stamping head 42 presses and causes the scrap to fall, the scrap no longer resists the stamping head 42, causing the reset component 6 to reset. The stamping column 41 resets inside the stamping head 42, causing the three extension blocks 52 to immediately reset and retract, preventing the extension blocks 52 from rubbing against the fracture surface formed after stamping. The lifting plate 57 is pressed and moved upward, synchronously moving the bottom extension blocks 52 upward, thus synchronously moving the entire stamping head 42 upward, preventing the stamping head 42 from falling during the reset process.

[0036] Reference Figures 1-8 The outer edges of the three extension blocks 52 remain on the same vertical extension line, and the bottom of the bottom extension block 52 is on the same horizontal plane as the bottom of the stamping head 42.

[0037] Specifically, the outer surfaces of the three extension blocks 52 are kept on the same vertical extension line, ensuring the consistency of the force on the edges of the three extension blocks 52. This allows the force on the lower pressure plate 44 to be better transmitted to the cutting edge at the bottom of the stamping head 42. Furthermore, the three extension blocks 52 can improve the load-bearing capacity of the stamping head 42 during stamping, distributing the stamping force vertically and evenly to the cutting edge of the stamping head 42. The bottommost extension block 52 and the cutting edge of the stamping head 42 work together to stamp the steel plate body 3, enhancing the strength of the cutting edge, reducing the duration of high stress on the cutting edge of the stamping head 42, reducing wear, and increasing the service life of the stamping head 42. The remaining structure is the same as in Embodiment 1.

[0038] Example 3, referring to Figures 1-4This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that a reset component 6 is installed between the stamping component 4 and the extension component 5. The reset component 6 includes a reset groove 61 opened on the top of the stamping column 41, and a reset member 62 fixedly connected in the reset groove 61, and the top of the reset member 62 is fixedly connected to the movable groove 45.

[0039] Specifically, during reset, the reset member 62 is reset. The reset member 62 can be a spring, which causes the reset member 62 to pop out downwards into the stamping head 42, causing the extension block 52 to quickly retract into the stamping head 42, and ejecting the waste material directly from the discharge port, thus achieving rapid collection of waste material.

[0040] Reference Figures 1-11 The bottom of the side wall of the bottommost extension block 52 is fitted with a stamping inclined surface 7, and the slope of the stamping inclined surface 7 is the same as the slope of the side of the stamping cutter head 42. The height of the stamping inclined surface 7 in the vertical direction is greater than the thickness of the steel plate body 3. The rest of the structure is the same as that of Embodiment 2.

[0041] Specifically, when the stamping head 42 performs stamping, the three extension blocks 52 are fully extended. The bottommost extension block 52 and the cutting edge at the bottom of the stamping head 42 jointly stamp the steel plate body 3. The stamping inclined surface 7 and the side of the stamping head 42 have the same slope, so that during the stamping process of the steel plate body 3, the sidewalls of the stamping inclined surface 7 and the extension blocks 52 will not rub against the fracture surface of the steel plate body 3. After the stamping is completed, the scrap falls directly, and the extension blocks 52 immediately retract. While ensuring the stamping strength of the stamping head 42, friction between the stamping head 42 and the fracture surface of the steel plate body 3 can be avoided, thus preventing the adhesion of built-up edge and the generation of stress and heat after the stamping head 42 is rubbed.

[0042] Based on embodiments 1-3, the working principle of this invention is as follows: During stamping, the steel plate body 3 is placed between the upper stamping die 1 and the lower stamping die 2. The cylinder 12 is activated, causing the cylinder 12 push rod to push the stamping plate 14 and the stamping column 41 downward. During the downward movement, when the stamping cutter head 42 is blocked by the baffle body, the stamping column 41 continues to move in the movable groove 45, causing the stamping column 41 to push the three extension blocks 52 to unfold synchronously in all directions. The stamping ring 43 presses down the lower pressure plate 44, causing the lower pressure plate 44 to push the stamping cutter head 42 and the extension blocks 52 to stamp the steel plate body 3 simultaneously. After stamping is completed, the reset member 62 resets and pushes the stamping cutter head 42 downward, causing the stamping cutter head 42 to eject the scrap downward. At the same time, the extension block 52 is driven by the extrusion hole 54 in the stamping column 41 to retract into the stamping cutter head 42, avoiding friction between the extension block 52 and the fracture surface formed after stamping.

Claims

1. A high-strength steel plate stamping machine for lightweighting body components of new energy vehicles, comprising an upper stamping die (1), a lower stamping die (2) disposed at the bottom of the upper stamping die (1), and a steel plate body (3) disposed between the upper stamping die (1) and the lower stamping die (2), characterized in that, It also includes a stamping unit disposed inside the upper stamping die (1); The upper stamping die (1) includes a stamping top plate (11), a cylinder (12) disposed on the top of the stamping top plate (11), a sleeve (13) disposed on the bottom of the stamping top plate (11), a stamping plate (14) disposed on the bottom of the push rod of the cylinder (12), and the stamping plate (14) is slidably connected to the inner wall of the bottom of the sleeve (13), and a lower push plate (15) disposed on the bottom of the sleeve (13), and the stamping unit is disposed on the bottom of the stamping plate (14); The stamping unit includes a stamping component (4) disposed at the bottom of the stamping plate (14) and an extension component (5) arranged in a ring array on the stamping component (4); the stamping component (4) is used to stamp the steel plate body (3), and the extension component (5) is used to extend the stamping component (4) during stamping; The stamping component (4) includes a stamping column (41) disposed at the bottom of the stamping plate (14), a stamping cutter head (42) disposed at the bottom of the stamping plate (14), a stamping ring (43) disposed at the bottom of the stamping plate (14) and located around the stamping column (41), and a lower pressure plate (44) disposed at the top of the stamping cutter head (42). The expansion component (5) includes expansion holes (51) arranged in a ring on the side wall of the stamping head (42), three expansion blocks (52) arranged from top to bottom in the expansion holes (51), movable holes (53) arranged in a ring on the side wall of the stamping column (41), extrusion holes (54) opened between two adjacent movable holes (53), and one side of the three expansion blocks (52) is slidably connected to the extrusion hole (54). Limiting plates (55) are symmetrically arranged on both sides of the three expansion blocks (52) and are symmetrically opened at horizontal positions. The expansion hole (51) has three limiting grooves (56) on both sides, and three limiting plates (55) are respectively slidably disposed in the three limiting grooves (56). The length of the three limiting grooves (56) is longer than the length of the three limiting plates (55). The lifting plate (57) is disposed at the bottom of the stamping column (41). Connecting blocks (58) are symmetrically disposed on both sides of the expansion block (52) at the bottom. Extension grooves (59) matching the connecting blocks (58) are symmetrically opened on both sides of the bottom of the expansion hole (51). The groove walls of the two extension grooves (59) are parallel. The outer edges of the three extension blocks (52) remain on the same vertical extension line, and the bottom of the bottom extension block (52) is on the same horizontal plane as the bottom of the stamping head (42).

2. The high-strength steel plate stamping machine for lightweighting new energy vehicle body components according to claim 1, characterized in that: The lower stamping die (2) includes a stamping base plate (21) disposed at the bottom of the stamping top plate (11), a bearing plate (22) disposed at the top of the stamping base plate (21), a plurality of positioning rods (23) disposed at the top of the bearing plate (22), and one end of the steel plate body (3) abutting against the plurality of positioning rods (23), and a support leg disposed at the bottom of the bearing plate (22).

3. The high-strength steel plate stamping machine for lightweighting new energy vehicle body components according to claim 2, characterized in that: The lower stamping die (2) also includes a stamping hole (24) in the middle of the support plate (22) and a blanking hole (25) at the bottom of the stamping hole (24).

4. The high-strength steel plate stamping machine for lightweighting new energy vehicle body components according to claim 1, characterized in that: The stamping column (41) is a frustum-shaped column with a small bottom and a large top, and the top of the stamping column (41) is provided with a movable groove (45) that matches the stamping column (41).

5. The high-strength steel plate stamping machine for lightweighting new energy vehicle body components according to claim 1, characterized in that: The side of the stamping cutter head (42) is inclined, and the diameter of the bottom of the stamping cutter head (42) is larger than the diameter of its top.

6. The high-strength steel plate stamping machine for lightweighting new energy vehicle body components according to claim 5, characterized in that: The outer edge of the lower pressure plate (44) is slightly longer than the outer edge of the stamping ring (43), and the outer edge of the bottom of the stamping cutter head (42) is on the same vertical extension line as the midpoint of the cross section on one side of the lower pressure plate (44).

7. The high-strength steel plate stamping machine for lightweighting new energy vehicle body components according to claim 1, characterized in that: A reset component (6) is provided between the stamping component (4) and the extension component (5); the reset component (6) includes a reset groove (61) opened on the top of the stamping column (41) and a reset member (62) provided in the reset groove (61), and the top of the reset member (62) is fixedly connected to the movable groove (45).

8. The high-strength steel plate stamping machine for lightweighting new energy vehicle body components according to claim 1, characterized in that: The bottom of the side wall of the extension block (52) at the bottom is fitted with a stamping slope (7), and the slope of the stamping slope (7) is the same as the slope of the side of the stamping cutter head (42). The height of the stamping slope (7) in the vertical direction is greater than the thickness of the steel plate body (3).

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