CN211027769U - Mold structure for forming outer cover edge - Google Patents
Mold structure for forming outer cover edge Download PDFInfo
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- CN211027769U CN211027769U CN201922010627.6U CN201922010627U CN211027769U CN 211027769 U CN211027769 U CN 211027769U CN 201922010627 U CN201922010627 U CN 201922010627U CN 211027769 U CN211027769 U CN 211027769U
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Abstract
The utility model discloses a mould structure especially relates to a be used for outer covering piece edge shaping mould structure, belongs to car mould manufacturing and designing technical field. A mold structure for outer cover edge molding is provided which is capable of effectively reducing or even eliminating the defects of cover edge molding. The die structure comprises an upper die and a lower die, wherein a gradual change type negative clearance compensation bulge with the width not less than 25 mm is arranged on the inner side of the edge of the upper die, and the edge of the outer covering part is forced to be pressed through the gradual change type negative clearance compensation bulge in the forming process.
Description
Technical Field
The utility model relates to a mould structure especially relates to a be used for outer covering piece edge shaping mould structure, belongs to car mould manufacturing and designing technical field.
Background
With the development of the automobile industry, consumers have higher and higher requirements on the appearance of automobiles, and the cool, smooth and mirror surface effect becomes an important index for purchasing automobiles, and all the requirements are determined by the appearance quality of automobile bodies to a great extent, so that automobile manufacturers have higher and higher requirements on the external covering mold, the surface quality requirement of visible appearance areas of the automobile bodies is highest, any surface defects such as wrinkles, bulges, pits, scratches, pull marks and the like are not allowed, and strict illumination inspection is required. The traditional mode for solving the defects of the appearance surface is mainly finished by grinding and repairing by a fitter, but the mode has very high requirements on the skills of the fitter, the condition of uneven manual correction exists, the correction period is very long, and the manufacturing cost of the die is obviously increased.
The covering part mold forming is a factor causing appearance defects of the edge of the appearance surface and mainly comprises the following points:
1. in the molding process of the die, the plate material at the edge round corner is hardened, the internal stress of the nearby area is intensified, and local deformation is caused;
2. in the opening process of the mold, the side wall surface at the edge of the appearance surface is influenced by friction force, and the fillet is stretched towards the opening direction of the mold, so that the fillet at the edge of the appearance surface is upwarped;
3. in order to improve the wear resistance of the round corners, the convex and round corners of the molded surface are quenched before finish machining, the material of the round corner quenching area is harder during machining, the adjacent appearance surface area is not quenched, the relative hardness is lower, cutter adjustment exists during finish machining due to hardness difference, and the molded surface of the round corner area is 0.06mm higher than that of the adjacent appearance surface.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a mold structure for outer cover edge molding is provided which is capable of effectively reducing or even eliminating the defects of cover edge molding.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a mould structure for outer covering piece edge molding, includes mould and lower mould, is provided with the gradual change formula negative clearance compensation arch that width is no less than 25 mm in the inboard at last mould edge, and in the forming process, the edge of outer covering piece passes through the protruding pressure of gradual change formula negative clearance compensation.
Furthermore, a gradual change type droop compensation surface extending outwards is arranged on the inner side of the lower die edge, and the arrangement position of the gradual change type droop compensation surface on the inner side of the lower die edge is matched with the position of the gradual change type negative clearance compensation protrusion.
In a preferred aspect of the foregoing aspect, the width of the gradual change type sag compensation surface is adapted to the width of the gradual change type negative clearance compensation protrusion, and is 25 to 32 mm.
Further, the height of the outermost side of the gradual-change negative clearance compensation protrusion is not less than 0.13 mm, and the gradual-change negative clearance compensation protrusion smoothly and inwardly extends.
In a preferred aspect of the foregoing aspect, the height of the outermost side of the gradual change type negative clearance compensation protrusion is 0.13 to 0.16 mm.
Further, the sag height of the outermost side of the gradual change type sag compensation surface does not exceed 0.1mm, and the gradual change type sag compensation surface smoothly and inwards extends.
In a preferred aspect of the above aspect, the sag height at the outermost side of the gradient sag compensation surface is 0.08 to 0.10 mm.
The utility model has the advantages that: according to the forming die, the gradual change type negative clearance compensation protrusion with the width not less than 25 mm is arranged on the inner side of the edge of the upper die, and in the forming process, the edge of the outer covering piece is enabled to pass through the gradual change type negative clearance compensation protrusion to reduce or reduce the forming defects at the edge of the covering piece. The concrete shape of the gradual change type negative clearance compensation protrusion is that the gradual change type protrusion extending outwards is arranged on the inner side of the edge of the upper die, so that the gradual change type protrusion exists, a middle gap, namely a negative clearance, is formed between the upper die and the lower die after the upper die and the lower die are matched in place, and the protrusion is arranged at the edge of the upper die, so that strong pressure on the edge of the covering piece can be formed, over-pressing on the edge of the covering piece is formed, and the defect of forming the edge of the covering piece is reduced or even eliminated. Certainly, in order to strengthen the cooperation effect, improve the ability of eliminating covering piece edge shaping defect, can also set up corresponding structure at the outside edge of lower mould, this application promptly the droop compensation face of gradual change formula, only this moment, the droop compensation face of gradual change formula height or the thickness of calling out are less than the bellied height of gradual change formula negative clearance compensation or the thickness of calling out to satisfy the mesh that forms the negative clearance in the mould middle part.
Drawings
FIG. 1 is a schematic structural view of a mold structure for forming an outer cover edge according to the present invention, in which dotted lines are compensation surfaces of a variable negative clearance compensation protrusion and a variable sag compensation surface;
FIG. 2 is a schematic view of a curvature comb for the compensated front A-side;
fig. 3 is a schematic view of the compensated a-plane curvature comb.
Labeled as: the device comprises an upper die 1, a lower die 2, a gradual change type negative clearance compensation bulge 3 and a gradual change type droop compensation surface 4.
Detailed Description
The utility model provides a mould structure for outer covering part edge forming which can effectively reduce or even eliminate the defects of the covering part edge forming, as shown in figure 1. The die structure comprises an upper die 1 and a lower die 2, wherein a gradual change type negative clearance compensation protrusion 3 with the width not less than 25 mm is arranged on the inner side of the edge of the upper die, and the edge of the outer covering part is forced through the gradual change type negative clearance compensation protrusion 3 in the forming process. According to the forming die, the gradual change type negative clearance compensation protrusion with the width not less than 25 mm is arranged on the inner side of the edge of the upper die, and in the forming process, the edge of the outer covering piece is enabled to pass through the gradual change type negative clearance compensation protrusion to reduce or reduce the forming defects at the edge of the covering piece. The concrete shape of the gradual change type negative clearance compensation protrusion is that the gradual change type protrusion extending outwards is arranged on the inner side of the edge of the upper die, so that the gradual change type protrusion exists, a middle gap, namely a negative clearance, is formed between the upper die and the lower die after the upper die and the lower die are matched in place, and the protrusion is arranged at the edge of the upper die, so that strong pressure on the edge of the covering piece can be formed, over-pressing on the edge of the covering piece is formed, and the defect of forming the edge of the covering piece is reduced or even eliminated. Certainly, in order to strengthen the cooperation effect, improve the ability of eliminating covering piece edge shaping defect, can also set up corresponding structure at the outside edge of lower mould, this application promptly the droop compensation face of gradual change formula, only this moment, the droop compensation face of gradual change formula height or the thickness of calling out are less than the bellied height of gradual change formula negative clearance compensation or the thickness of calling out to satisfy the mesh that forms the negative clearance in the mould middle part.
The gradual change type droop compensation surface 4 extending outwards is arranged on the inner side of the lower die edge, and the arrangement position of the gradual change type droop compensation surface 4 on the inner side of the lower die edge is matched with the position of the gradual change type negative gap compensation protrusion 3. Namely, the gradual change type negative clearance compensation bulge 3 on the upper die and the gradual change type drooping compensation surface 4 on the lower die are tightly matched in the forming process of the covering piece, so that strong pressure can be formed on the edge of the covering piece, a negative clearance is formed in the middle of the covering piece, and the purpose of better eliminating the edge defect of the covering piece is achieved.
According to statistics, the positions of the defects at the edge of the covering part are shown, and the specific structures of the gradual change type negative clearance compensation protrusion 3 and the gradual change type droop compensation surface 4 are that the width of the gradual change type droop compensation surface 4 naturally needs to be adapted to the width of the gradual change type negative clearance compensation protrusion 3, namely, the widths are both 25-32 mm; the height original side of the outermost side of the gradual-change type negative clearance compensation bulge 3 is not less than 0.13 mm, and the gradual-change type negative clearance compensation bulge smoothly and inwards extends gradually; preferably, the height of the outermost side of the gradual-change negative clearance compensation protrusion 3 is 0.13-0.16 mm; the sagging height of the outermost side of the gradual-change-type sagging compensation surface 4 does not exceed 0.1mm in principle, and the gradual-change-type sagging compensation surface smoothly and inwards extends gradually; preferably, the sag height of the outermost side of the gradual change type sag compensation surface 4 is 0.08-0.10 mm.
In summary, the press molding of the automobile covering part by using the mold structure of the present application has the following advantages,
the edge of the appearance surface is simply compensated, so that the appearance defect of the area is effectively overcome, the workload of a bench worker is reduced, and the quality of the appearance surface is ensured.
Example one
The scheme of the present application is further illustrated by the following specific examples.
The technical scheme of this application mainly through compensation edge outward appearance face processing digifax, measures such as the preparation negative clearance of mould profile outward appearance face edge under and, solve the problem of the edge outward appearance defect of face, concrete mode is as follows:
1. the edge area of the appearance surface of the lower die of the forming die is downwards provided with a compensation protrusion of 0.1mm, namely the gradual negative clearance compensation protrusion, the width of which is 30mm, along the boundary of the appearance surface, as shown in figure 1.
The A-surface curvature combs before and after the appearance surface compensation are compared, wherein FIG. 2 shows the A-surface curvature combs before the compensation, and FIG. 3 shows the A-surface curvature combs after the compensation.
2. In the same area, the upper mold surface is compensated, and a compensation surface with width of 30mm, namely the gradual change type droop compensation surface, is manufactured downwards along the boundary of the appearance surface, and is shown in figure 1. The compensation amount of the upper die is 0.05mm more than that of the lower die, so that the grinding and coloring rate of the upper die and the lower die in a boundary area reaches 100% in debugging and grinding of the die, and the quality of an appearance surface is ensured.
Claims (7)
1. A mould structure for outer cover edge forming, includes mould (1) and lower mould (2), its characterized in that: and a gradual change type negative clearance compensation bulge (3) with the width not less than 25 mm is arranged on the inner side of the edge of the upper die, and the edge of the outer covering part is forced to press through the gradual change type negative clearance compensation bulge (3) in the molding process.
2. A mold structure for outer cover edge molding according to claim 1, characterized in that: and a gradually-changing type droop compensation surface (4) extending outwards is arranged on the inner side of the lower die edge, and the arrangement position of the gradually-changing type droop compensation surface (4) on the inner side of the lower die edge is matched with the position of the gradually-changing type negative clearance compensation protrusion (3).
3. A mold structure for outer cover edge molding according to claim 2, characterized in that: the width of the gradual change type droop compensation surface (4) is adaptive to the width of the gradual change type negative clearance compensation protrusion (3), and the widths are 25-32 mm.
4. A mold structure for outer cover edge molding according to claim 2 or 3, characterized in that: the height of the outermost side of the gradual negative clearance compensation bulge (3) is not less than 0.13 mm, and the gradual negative clearance compensation bulge smoothly and inwards extends gradually.
5. A mold structure for outer cover edge molding according to claim 4, characterized in that: the height of the outermost side of the gradual-change negative clearance compensation protrusion (3) is 0.13-0.16 mm.
6. A mold structure for outer cover edge shaping according to claim 5, characterized in that: the sagging height of the outermost side of the gradual-change-type sagging compensation surface (4) is not more than 0.1mm, and the gradual-change-type sagging compensation surface smoothly and inwards extends gradually.
7. A mold structure for outer cover edge molding according to claim 6, characterized in that: the droop height of the outermost side of the gradual change type droop compensation surface (4) is 0.08-0.10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922010627.6U CN211027769U (en) | 2019-11-20 | 2019-11-20 | Mold structure for forming outer cover edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922010627.6U CN211027769U (en) | 2019-11-20 | 2019-11-20 | Mold structure for forming outer cover edge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211027769U true CN211027769U (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922010627.6U Active CN211027769U (en) | 2019-11-20 | 2019-11-20 | Mold structure for forming outer cover edge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211027769U (en) |
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2019
- 2019-11-20 CN CN201922010627.6U patent/CN211027769U/en active Active
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