CN-121624320-B - Internal support device, G-shaped part forming progressive die of new energy automobile and stamping method

CN121624320BCN 121624320 BCN121624320 BCN 121624320BCN-121624320-B

Abstract

The invention relates to an internal support device, a G-shaped part forming continuous die of a new energy automobile and a stamping method, wherein the device comprises a floating supporting block, a strip-shaped internal support and a plurality of pillows, the strip-shaped inner support extends along the conveying direction of the material belt and passes through a plurality of steps, the feeding end of the strip-shaped inner support is fixed on the floating supporting block, the discharging end of the strip-shaped inner support is suspended, and the sleeper blocks are fixed on the lower die and are respectively positioned between the adjacent steps. The internal support device meets the bending and forming requirements of the G-shaped piece. The progressive die is provided with punching unit, side cut unit, bending unit, plastic station and blanking station in proper order along the material area direction of delivery, and the back section of second bending workshop section is located to the internal stay device, and the bar internal stay extends to the plastic station from the second bending workshop section. The continuous die realizes the continuous processing of the G-shaped piece. The processing method comprises the steps of punching a positioning hole, cutting an outer edge, bending forwards, bending backwards, shaping and blanking. The stamping method utilizes the G-shaped part forming progressive die of the new energy automobile to process and obtain the G-shaped part, and has simple processing and high manufacturing efficiency.

Inventors

GU DAMING
ZHOU JIAMING
YU TIECHENG

Assignees

苏州铭峰精密机械有限公司

Dates

Publication Date: 20260512
Application Date: 20260205

Claims (9)

1. The inner support device is used for a G-shaped part forming progressive die of a new energy automobile and is used for processing the G-shaped part, wherein the G-shaped part comprises a base surface part and a lower folding part, the lower folding part is formed by folding down the inner side of the base surface part, and the inner support device is characterized in that: The continuous die is sequentially provided with a punching unit, a trimming unit, a bending unit, a shaping station and a blanking station along the conveying direction of the material belt, the bending unit is used for bending a blank into a G-shaped piece, the shaping station is used for shaping the G-shaped piece, the bending unit comprises a first bending section and a second bending section which are sequentially arranged, and the internal support device is arranged at the rear section of the second bending section; The inner support device comprises a floating support block, a strip-shaped inner support and a plurality of pillow blocks, wherein the floating support block can do lifting motion in a lower die, the strip-shaped inner support extends along the conveying direction of a material belt and passes through a plurality of working steps, the feeding end of the strip-shaped inner support is fixed on the floating support block, the discharging end of the strip-shaped inner support is suspended, the pillow blocks are fixed on the lower die and are respectively positioned between adjacent working steps, when the floating support block descends to the lowest point, all the pillow blocks support the lower part of the strip-shaped inner support, the strip-shaped inner support extends from the second bending working section to the shaping working station, and an avoidance groove matched with the moving track of the lower bending part is formed in the upper part of the strip-shaped inner support.
2. The new energy automobile G-shaped part forming progressive die comprising the internal bracing device of claim 1, wherein the G-shaped part further comprises a first side part, a first plane part, a second side part, a second plane part and a third plane part, the upper edge of the first side part and the upper edge of the second side part are respectively connected with the left side and the right side of the base part, the first side part and the first plane part are sequentially connected into a U-shaped bending structure, the base part, the second side part and the second plane part are sequentially connected into a second U-shaped bending structure, the base part, the second side part and the third plane part are sequentially connected into a third U-shaped bending structure, the second plane part and the third plane part are staggered front and back and have a height difference, and the first plane part, the second plane part and the third plane part are all parallel to the base part, and the new energy automobile G-shaped part forming progressive die is characterized in that: the punching unit is used for cutting a positioning hole on a discharging belt, the range of a processing unit of the discharging belt comprises a connecting area and a forming area, the positioning hole is positioned in the range of the connecting area, the trimming unit is used for cutting a blank in the forming area, and the blanking station is used for cutting the G-shaped piece from the discharging belt; All the directions of the folding angles among the base surface part, the first side surface part, the first plane part, the second side surface part, the second plane part and the third plane part are along the conveying direction of the material belt; the base surface part is in a U-shaped structure, the blank and the connecting area are provided with three connecting positions, two connecting positions are positioned at two ends of the front part of the base surface part, and the third connecting position is positioned at the rear side of the base surface part; The first bending section bends out a first bending angle between the first side surface portion and the first plane portion, a second bending angle between the second side surface portion and the second plane portion, and a third bending angle between the second side surface portion and the third plane portion, and the second bending section bends out a fourth bending angle between the base surface portion and the first side surface portion, and a fifth bending angle between the base surface portion and the second side surface portion.
3. The G-shaped part forming progressive die for the new energy automobile is characterized in that a lower folding part forming working section is arranged in the bending unit, the lower folding part forming working section is arranged between the first folding working section and the second folding working section, the lower folding part forming working section comprises a pre-punching waste material working station, a punching-off working station, a third half-folding working station and a third full-folding working station which are sequentially arranged, the pre-punching waste material working station cuts off two side edge waste materials on the inner side of the basal surface part to obtain a connecting bridge containing materials of the lower folding part, the punching-off working station breaks the connecting bridge, only a single suspension bridge is left, the third half-folding working station downwards folds the single suspension bridge by 30-60 degrees, and the third full-folding working station downwards folds the single suspension bridge by 90 degrees to obtain the lower folding part.
4. The G-shaped part forming progressive die of the new energy automobile according to claim 2, wherein the first bending section comprises a first half-folding station and a first full-folding station which are arranged in sequence, the first half-folding station is used for folding the first folding angle, the second folding angle and the third folding angle by 30-60 degrees, the first full-folding station is used for folding the first folding angle, the second folding angle and the third folding angle by 90 degrees, the second bending section comprises a second half-folding station and a second full-folding station which are arranged in sequence, the second half-folding station is used for folding the fourth folding angle and the fifth folding angle by 30-60 degrees, and the second full-folding station is used for folding the fourth folding angle and the fifth folding angle by 90 degrees in sequence.
5. The G-shaped part forming progressive die of the new energy automobile of claim 4, wherein a plurality of base surface through holes are formed in the base surface part, a base surface punching station is further arranged between the second half-folding station and the second full-folding station, and the base surface through holes are punched in the base surface part by the base surface punching station.
6. A G-shaped part stamping method implemented by using the new energy automobile G-shaped part forming progressive die according to any one of claims 2 to 5, characterized by comprising the steps of: S1, punching positioning holes, namely cutting a plurality of positioning holes on a material belt by using punching units by taking two sides of the material belt as positioning references, wherein the range of a processing unit comprises a connecting area with a square structure and a forming area positioned in the connecting area in design, and the positioning holes are positioned in the connecting area; S2, cutting the outer edge, namely cutting a blank in the forming area by using the trimming unit by taking the positioning hole as a positioning reference; s3, bending forwards, namely bending the first folding angle, the second folding angle and the third folding angle in the first bending section by taking the positioning hole as a positioning reference; S4, back bending, namely taking the positioning hole as a positioning reference, taking the strip-shaped inner support as an inner core, and bending the fourth folding angle and the fifth folding angle in the second bending section; S5, shaping, namely shaping the blank into the G-shaped piece at the shaping station by taking the positioning hole as a positioning reference and the strip-shaped inner support as an inner core; s6, blanking, namely cutting the G-shaped piece from the material belt at the blanking station by taking the positioning hole as a positioning reference.
7. The method of stamping G-shaped parts according to claim 6, wherein two blanks are arranged in the forming area in a mirror symmetry manner, the trimming unit cuts off waste material on the front, rear and outer sides of the blanks in a plurality of stations, and finally cuts off connecting waste material between the two blanks.
8. The method of stamping G-shaped parts according to claim 6 or 7, wherein the punching unit punches a middle positioning hole, two side positioning holes and a plurality of blank positioning holes in the connecting area, the middle positioning hole being located in the conveying center of the material belt, the side positioning holes being located at the side of the connecting area, and the blank positioning holes being located between the blank and the three connecting positions of the connecting area.
9. The method of stamping G-shaped parts according to claim 6, wherein the first, second or third plane parts are provided with plane through holes and/or convex hulls, and the punching unit is provided with the plane through holes and/or convex hulls.

Description

Internal support device, G-shaped part forming progressive die of new energy automobile and stamping method Technical Field The invention relates to the technical field of stamping processing, in particular to an internal stay device, a G-shaped part forming progressive die of a new energy automobile and a stamping method. Background Metal stamping is a common process for processing many metal products, and with the diversification of customer demands, the design of the mold also meets various product demands. As shown in fig. 1 and 2, the automobile tail gate welding plate is a G-shaped member for use in an automobile tail gate cover, which is a pair of mirror image members (first G-shaped member 1a, second G-shaped member 1 b). The automobile tail door lock cover is a G-shaped multi-bending structure seen from the side surface, and comprises a base surface part 11, a first side surface part 12a, a first plane part 13a, a second side surface part 12b, a second plane part 13b, a third plane part 13c and a lower bending part 15, wherein the base surface part 11 is of a U-shaped structure, the upper edge of the first side surface part 12a and the upper edge of the second side surface part 12b are respectively connected to the left side and the right side of the base surface part 11, the first side surface part 12a and the first plane part 13a are sequentially connected into a U-shaped bending structure, the base surface part 11, the second side surface part 12b and the second plane part 13b are sequentially connected into a second U-shaped bending structure, the base surface part 11, the second side surface part 12b and the third plane part 13c are sequentially staggered from front to back and have a height difference, the first plane part 13a, the second plane part 13b and the third plane part 13c are parallel to the base surface part 11 and overlap with the second plane part 13a with the second plane part 13b with the second plane part 13a with different projection ranges. The fold-down portion 15 is formed by folding down from the inside of the base surface portion 11. The base surface portion 11 is provided with a plurality of base surface through holes 111, and the lower projection range of a part of the base surface through holes 111 overlaps with the first plane portion 13 a. The first plane portion 13a is provided with a plurality of plane through holes 131, and the upper projection range of the plane through holes 131 is not overlapped with the base surface portion 11, the second plane portion 13b and the third plane portion 13 c. The second flat surface portion 13b is provided with a convex hull 132, and the upper projection range of the convex hull 132 overlaps with the base surface portion 11. The workpiece has the following technical difficulties: 1. the integrity of the base surface part 11 is poor, the two sides are provided with C-shaped bending structures, the left side and the right side of the base surface part 11 are in parallel relation, the base surface part 11 is easy to warp and deform during bending, and the parallelism of the first plane part 13a, the second plane part 13b and the third plane part 13C is difficult to ensure; 2. the base portion 11, the first planar portion 13a, the second planar portion 13b and the third planar portion 13c have a height difference therebetween and overlap in upper and lower positions, and the first planar portion 13a must be formed by bending after the second planar portion 13b and the third planar portion 13c are bent in place, otherwise interference occurs; 3. The base through-hole 111, the plane through-hole 131 and the convex hull 132 cannot be manufactured after all bending is completed, because plane materials with different heights interfere with each other to influence the punch setting; 4. The presence of the turndown 15 can limit the conveying mode of the material belt, and the conveying mode of linear translation cannot be adopted, but the material belt is required to float up and down, otherwise, the die can prevent the material belt from moving forward in the step bending process of the turndown 15. Chinese patent CN116765276a discloses a high-precision C-shaped workpiece extrusion molding method and a molding progressive die, which adopts a rolling insert on a lower die in order to obtain a C-shaped workpiece. The rolling insert is an inner core with an axis along the conveying direction of the material belt and is used for providing inner arc support for the C-shaped structure. The rolling insert extends to a plurality of stations, so that a single-side suspension structure with gradually changed cross section is adopted. The height of the rolling insert cannot be changed, and the moving track of the material belt is limited, so that in the forming method, the material belt is not moved up and down, and the forming method is not suitable for a plurality of products with complex bending structures. Because the bending step will cause th