CN-116441424-B - Mould for shaping side of part with negative angle structure at two ends

Abstract

The invention provides a die for shaping the sides of parts with negative angle structures at two ends, which comprises an upper die assembly and a lower die assembly, wherein two groups of mutually matched side shaping wedge units and side pressing material core units are arranged in the die assembly in the invention, so that the negative angle structures at two ends of a part along the length direction can be shaped, the shaping of the negative angle structures at two ends of the part can be realized by once die assembly, the shaping process and the labor intensity of operators are simplified, and the side pressing material core is separated from the part along the longitudinal direction after shaping, thereby facilitating demoulding.

Inventors

• HUANG PI
• WU SHENGYU
• CHEN WENLI
• QIN JINYUN
• ZHOU XIANGYANG
• DU XIANMING
• MO SHENGMING
• LI JIANQIANG
• LV YI
• WEI QINGYUN
• XU XIANG

Assignees

• 柳州五菱汽车工业有限公司

Dates

Publication Date

20260508

Application Date

20230313

Claims (13)

1. 1. A mould for side shaping of a part with a negative angle structure at both ends, comprising the following components: The upper die assembly comprises an upper die holder and two lateral pressing core units, wherein the two lateral pressing core units are respectively positioned at two ends of the upper die holder in the longitudinal direction; each side pressing material core unit is provided with a slotting tool fixed on the upper die holder, the inner side wall of the slotting tool is provided with a first driving surface, the side pressing material core units also comprise side pressing material cores and material core resetting parts, the side pressing material cores are positioned on the inner sides of the slotting tools on the same side and can longitudinally reciprocate relative to the upper die holder, the side pressing material cores are provided with cavities with downward openings, the side walls of the side pressing material cores are also provided with second inclined surfaces, and the material core resetting parts are used for driving the side pressing material cores to longitudinally move to an initial working position when the dies are demolded, wherein the longitudinal direction is the length direction of a part; The lower die assembly comprises a lower die holder, wherein supporting male dies are arranged at two ends of the lower die holder, side trimming wedge units are arranged at two ends of the lower die holder in the longitudinal direction, each side trimming wedge unit comprises a side trimming wedge and a wedge resetting component, each side trimming wedge can longitudinally reciprocate relative to the lower die holder, a first inclined surface is arranged on the outer side of each side trimming wedge, a second driving surface is arranged on the inner side of each side trimming wedge, and each wedge resetting component is used for driving each side trimming wedge to move to an initial installation position when the die is demolded; In the process of die assembly of the upper die assembly and the lower die assembly, the first driving surface is contacted with the first inclined surface to drive the side trimming wedge to move towards the part to a first preset position, then the second inclined surface is abutted against the second driving surface to drive the side pressing material core to longitudinally move inwards, and finally the cavity and the supporting male die are matched to form a negative angle structure of the part; in the process of separating the upper die assembly from the lower die assembly, the lateral pressing material core longitudinally moves outwards to reset under the action of the material core resetting component, and the lateral adjusting wedge longitudinally moves outwards to reset under the action of the wedge resetting component.
2. 2. The mold for side shaping of a negative angle structural part according to claim 1, wherein the side shaping wedge unit comprises a side shaping insert detachably connected to an inner side wall of the side shaping wedge, and the second driving surface is provided on the side shaping insert.
3. 3. A mould for side shaping of a part having a negative angle structure at both ends according to claim 2, wherein the side shaping inserts are locally convex towards the surface of the part to form mating surfaces for abutment with the ends of the part.
4. 4. The mold for side shaping of parts with negative angle structures at both ends according to claim 2, wherein the side pressing core unit is further provided with a core guiding assembly comprising a first runner and a first slider, one of the first runner and the first slider is provided to the side pressing core, the other is provided to the upper mold base, and the first runner and the first slider cooperate to guide the side pressing core in a longitudinal movement.
5. 5. The mold for shaping side of negative angle structural part according to claim 4, wherein guide plates are protruded from both side walls of the side pressing core extending in the longitudinal direction, the first sliding blocks are the guide plates, detachable pressing plates are arranged at positions of the upper mold base corresponding to the two guide plates, and the pressing plates and the inner side walls of the upper mold base form the first sliding grooves.
6. 6. The die for side shaping of a part having a negative angle structure at both ends thereof according to claim 1, wherein the upper die holder has a first wall and a second wall disposed opposite to each other, the side press core is reciprocally moved between the first wall and the second wall, and both the first wall and the second wall are elastically abutted against both sides of the side press core to restrict a maximum displacement of the side press core in a longitudinal direction to both sides.
7. 7. The die for side shaping of a part with negative angle structure at both ends according to claim 1, wherein the outer sidewall of the side shaping wedge further comprises a first vertical surface connected to the lower end of the first inclined surface, the slotting tool further comprises a second vertical surface connected to the upper end of the first driving surface, and the first vertical surface and the second vertical surface can be vertically guided and matched during die assembly.
8. 8. The mold for side shaping of a negative angle structural member at both ends according to claim 7, further comprising a lower driving blade detachably attached to an outer sidewall of said side shaping wedge, said first inclined surface and said first vertical surface being provided at said lower driving blade.
9. 9. The mold for side shaping of a negative angle structural part at both ends according to claim 1, wherein the first driving surface is a bevel; Or/and the second driving surface is an inclined surface; Or/and, the device further comprises a wedge limiting component which is arranged on the lower die holder and positioned at the outer side of the side inclined wedge and used for limiting the maximum outward displacement of the side inclined wedge; alternatively/or additionally, the cam resetting component comprises a telescopic cylinder which is longitudinally arranged, and the telescopic cylinder is compressed in the process of die assembly; Alternatively or in addition, the core return member includes a longitudinally disposed spring assembly that is stretched or compressed during clamping.
10. 10. The mold for side shaping of a part with negative angle structures at two ends according to claim 1, wherein the side shaping wedge unit further comprises a wedge guiding assembly, the wedge guiding assembly comprises a second chute and a second slide block, one of the second chute and the second slide block is arranged on the side shaping wedge, the other is arranged on the lower mold base, and the second chute and the second slide block are matched to guide the side shaping wedge in a longitudinal movement manner.
11. 11. The mold for side shaping of a negative angle structural member of claim 10, wherein the second runner is a V-shaped runner and the second slider is a V-shaped guide block mated with the V-shaped runner.
12. 12. The mold for side shaping of negative angle structural parts according to any one of claims 1 to 11, wherein both side walls of each of said side press cores extending in the longitudinal direction are provided with outwardly extending limit projections having upwardly raised arc-shaped convex surfaces, said side shaping wedge unit further comprises two guide plates fixed to said lower die holder, said two guide plates being disposed on both sides of said supporting punch, said arc-shaped convex surfaces being gradually restricted under said guide plates and being capable of sliding relatively in the longitudinal direction when said side press cores are lowered.
13. 13. The mold for side shaping of a negative angle structural member at both ends according to claim 12, wherein said limit projection has opposite extending lateral walls provided with said arcuate convex surfaces.

Description

Mould for shaping side of part with negative angle structure at two ends Technical Field The invention relates to the technical field of molding dies for vehicle parts, in particular to a die for shaping sides of parts with negative angle structures at two ends. Background The rear floor beam is a beam part under the rear floor of a certain vehicle type, and plays a role in supporting and reinforcing the strength of the rear floor. The middle of the part supports the rear floor, and the two ends of the part are connected with longitudinal beams and are of a negative angle structure. The part is characterized by being an elongated part (length: width: 1712 mm: 137 mm) besides the negative angles at the two ends. Referring to fig. 1, fig. 1 is a schematic flow chart of a vehicle rear floor beam forming in the prior art. The mould of the shaping hole flanging mould at one side of the rear floor beam is in the form of a casting mould, and the structure of the mould comprises a mould body and two sets of devices for shaping and hole flanging at the side. The die body is an upper die holder (not shown in the figure) and a lower die holder 2', and the lower die holder 2' shown in fig. 1 is provided with side shaping, hole flanging and other device components on the die body of the lower die holder 2 '. In the production process, the whole die is arranged on a press, the upper die base and parts thereof move downwards, and the side pressing material core presses the part and then drives the synchronous side shaping part end of the side shaping wedge of the lower die to make the plastic deformation of the lower die reach the structural shape required by production welding. In the prior art, two sets of side shaping die cavities are usually designed on the lower die holder 2', namely a first side shaping die cavity 21' and a second side shaping die cavity 22', which respectively carry out side shaping on two ends of the rear floor beam 1', each end corresponds to one set of side shaping die cavity, after the first end 11 'is shaped on the side, the rear floor beam 1' needs to be rotated 180 degrees to put the second end 12 'into the second side shaping die cavity, and an arrow in fig. 1 indicates the turning direction of the rear floor beam 1', so that a part with a required structural shape can be obtained by two times of press and die actions. In the prior art production mode, because the part is comparatively slender, 63% of the part floats outside the die cavity and the press in the production process, a certain potential safety hazard exists, and from the operation perspective, after one end of the side shaping is finished, the other end of the side shaping is required to be put into a second set of side shaping die cavity by rotating 180 degrees, so that the press and the die act twice to obtain the part with the required structural shape, the part is more complicated, and the labor intensity of operators is also greatly tested. How to solve the technical problems is a technical problem to be solved by the person skilled in the art. Disclosure of Invention The invention aims to provide a die capable of shaping the negative angle structure sides of two ends of a part at the same time by once die assembly. The invention provides a die for shaping the side of a part with a negative angle structure at two ends, which comprises the following components: The upper die assembly comprises an upper die holder and two lateral pressing core units, wherein the two lateral pressing core units are respectively positioned at two ends of the upper die holder in the longitudinal direction; the side pressing material core unit is provided with a slotting tool fixed on the upper die holder, the inner side wall of the slotting tool is provided with a first driving surface, the side pressing material core unit further comprises a side pressing material core and a material core resetting component, the side pressing material core is positioned on the inner side of the slotting tool on the same side and can longitudinally reciprocate relative to the upper die holder, the side pressing material core is provided with a cavity with a downward opening, the side wall of the side pressing material core is also provided with a second inclined surface, and the material core resetting component is used for driving the side pressing material core to longitudinally move to an initial working position when the die is demolded, wherein the longitudinal direction is the length direction of a part; The lower die assembly comprises a lower die holder, wherein supporting male dies are arranged at two ends of the lower die holder, side trimming wedge units are arranged at two ends of the lower die holder in the longitudinal direction, each side trimming wedge unit comprises a side trimming wedge and a wedge resetting component, each side trimming wedge can longitudinally reciprocate relative to the lower die holder, a first inclined surface is arrange