CN210098707U

CN210098707U - Front floor stamping die structure

Info

Publication number: CN210098707U
Application number: CN201920548267.2U
Authority: CN
Inventors: 张昀; 利晓林; 苏丹; 吴志兵; 尤彬波; 陈晓红
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-02-21
Anticipated expiration: 2029-04-19

Abstract

The utility model provides a preceding floor stamping die structure, including last mould, lower mould and with go up the mould with lower mould complex blank holder, the both sides of lower mould are equipped with half convex closure, the edge of keeping away from each other on the half convex closure with the terminal edge parallel and level of lateral part of lower mould. The utility model discloses a design into two half protruding package structures with lower mould (terrace die), design into double-deck frame structure with the blank holder simultaneously to with the regional restriction of activity of panel beating blank in second frame region, improve product stamping stability, avoid stamping forming unstability to lead to the problem of wrinkling, make before the new forms of energy motorcycle type floor formability better, reduce debug time, promote material utilization ratio, reduce manufacturing cost.

Description

Front floor stamping die structure

Technical Field

The utility model relates to an auto parts machining field especially relates to a front floor stamping die structure.

Background

In the automobile industry, along with the increasing demand of the market on new energy vehicle types, the difference between the white vehicle bodies of the new energy vehicle types and the white vehicle bodies of the traditional vehicle types puts more severe requirements on the formability of vehicle body stamping parts and the manufacturing process, while the front floor of the existing new energy vehicle types generally comprises two types of middle half convex hull drawing flanging and extruded section, wherein the middle convex hull drawing flanging needs to be stamped and formed, and the part characteristic puts higher requirements on the formability of parts.

At present, a new energy automobile front floor mould is often drawn (drawn, punctured) → trimming, punching → reshaping, trimming and flanging, and three processes are completed. In particular, since the third step has many process contents and is difficult to adjust the die, the following cases mainly exist in the automobile front floor stamping:

(1) the front floor is spliced, the convex hulls are inward, so that parts are insufficiently formed, the corner areas are easy to wrinkle, and the side walls of the convex hulls are easy to crack;

(2) in the debugging process, the state of the flat plate area is unstable;

(3) the material utilization rate in actual production is low;

as shown in fig. 1, in the first prior art, a piercing knife 2 is added to a female die 1, and when the die reaches 10mm to the bottom, the piercing knife 2 starts to pierce a metal plate waste region when working, so as to prevent drawing cracking, but the scheme has complex movement, increases steel blocks, increases manufacturing cost, and reduces material utilization rate;

fig. 2 is a schematic structural diagram of the male die 3 penetrating through the blank holder 5, as shown in fig. 2, in a second prior art scheme, an R corner (rounded corner) at the root of a convex hull 4 on the male die 3 is enlarged in a drawing stage, so that a strong pressure is added to the peripheral area of the R corner on the convex hull 4, and the R corner is restored to an original size when being shaped in a later process, so as to prevent drawing cracking.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a front floor stamping die structure capable of improving stamping stability to avoid forming wrinkles.

The utility model provides a preceding floor stamping die structure, including last mould, lower mould and with go up the mould with lower mould complex blank holder, the both sides of lower mould are equipped with two half convex hulls, the edge of keeping away from each other on the half convex hull with the terminal edge parallel and level of lateral part of lower mould.

Furthermore, the upper die is a female die and is a first forming unit arranged on an upper sliding block of the machine table, the lower die is a male die and is a second forming unit fixed on a lower platform of the machine table, and the blank holder is used for limiting the moving area of the sheet metal blank.

Furthermore, the half convex hulls are symmetrically arranged at the edge of the upper surface of the lower die.

Further, the two half convex hulls can be spliced to form a convex hull whole.

Furthermore, the blank holder comprises a through hole with a through middle part, a first frame body and a second frame body, wherein the first frame body and the second frame body are arranged around the through hole in the circumferential direction, and the first frame body is arranged between the through hole and the second frame body.

Further, the through hole is a square hole, and the first frame body and the second frame body are square frame bodies.

Further, the sheet metal blank moving area is the second frame area.

To sum up, the utility model discloses a design into two half convex closure structures with lower mould (terrace die), design into double-deck frame structure with the blank holder simultaneously to with the regional restriction of activity of panel beating blank in second frame region, improve product stamping stability, avoid stamping forming unstability to lead to the problem of wrinkling, make before the new forms of energy motorcycle type floor formability better, reduce debug time, promote material utilization ratio, reduce manufacturing cost.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of an upper die (female die) in a front floor stamping die structure in a first prior art;

FIG. 2 is a schematic structural diagram of a lower die (male die) penetrating through a blank holder in a front floor stamping die structure according to a second prior art;

fig. 3 is a schematic structural view of an embodiment of a front floor stamping die structure according to the present invention;

FIG. 4 is a schematic structural view of the upper mold (female mold) of FIG. 3;

FIG. 5 is a schematic view of the blank holder of FIG. 3;

FIG. 6 is a top view of the bead ring of FIG. 3;

FIG. 7 is a schematic view of the structure of the lower mold (male mold) of FIG. 3;

fig. 8 is a top view of the lower die (punch) of fig. 3.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the invention, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 3-8, the utility model provides a front floor stamping die structure, which comprises an upper die 10, a lower die 20 and a blank holder 30.

As shown in fig. 3, 4, 5, and 7, in the present invention, the upper mold 10 is a female mold, and the lower mold 20 is a male mold. Specifically, the upper die 10 is a first forming unit arranged on an upper sliding block of a machine table, the lower die 20 is a second forming unit fixed on a lower platform of the machine table, the blank holder 30 is used for limiting an area unit of movement of a sheet metal blank, and the upper die 10 and the lower die 20 are respectively matched with the blank holder 30 to obtain a front floor die of the new energy automobile through punching.

Further, as shown in fig. 5 and 6, the blank holder 30 includes a through hole 31 penetrating through the middle, and a first frame 32 and a second frame 33 surrounding the through hole 31, the second frame 33 is disposed between the through hole 31 and the first frame 32, the two sides of the lower die 20 are provided with the half-convex hulls 21, the whole profile of the lower die 20 (including the two half-convex hulls 21) passes through the through hole 31 in the process of closing the die by the front floor press forming, the blank holder 30 is jacked up between the upper die 10 and the lower die 20 when the die is opened, and the sheet metal blank active area is the second frame 33 area, that is, the sheet metal blank is limited within the range of the second frame 33 area.

The utility model discloses a restrict panel beating blank home range on second framework 33, make before the new forms of energy motorcycle type floor formability better, reduce debug time, promote material utilization ratio, reduce manufacturing cost. In a preferred embodiment, the through hole 31 is a square hole, and the first frame 32 and the second frame 33 are square frames.

As shown in fig. 7 and 8, the lower mold 20 provided by the present invention has a double convex structure, so as to improve the stamping stability of the product and solve the problem of instability and wrinkling caused by stamping forming; specifically, in this embodiment, the edge of the upper surface of lower mould 20 is located to half convex closure 21 symmetry, and the edge (bottom side edge) that keeps away from each other on two half convex closures 21 is the terminal marginal parallel and level of lateral part of lower mould 20, because the utility model provides a higher and lateral wall of the lateral wall of biconvex closure (2 half convex closures 21) does not have the product, and the blank can flow to the lateral wall in the forming process, is favorable to promoting material utilization.

In the utility model, two half convex hulls 21 can be spliced to form a convex hull whole body; specifically, the molded product is cut along a medial axis relative to the two half-domes, one of the cut portions is moved to bring the two half-dome edges into alignment, and then the final panel with the complete dome is formed by welding.

When the die is used, the blank holder 30 is jacked to be higher than the top surface of the lower die 20 (male die), then a sheet metal blank of an upper workpiece is placed, an upper sliding block of a machine table drives the upper die 10 (drawing female die) to move downwards, and when the upper die 10 (drawing female die) moves downwards to be attached to the molded surface of the blank holder 30, the forming of the sheet metal blank of a part is completed; then the blank holder 30 and the upper die 10 continue to move downwards, so that the sheet metal blank is contacted with a lower die 20 (a drawing double-convex die) of a double-half convex hull fixed on a lower platform of the machine table, and the integral shape of the part is formed; and finally, when the mold formed by the upper mold 10, the blank holder 30 and the lower mold 20 continuously descends to a bottom dead center, completing the whole molding of the whole shape of the part. And (4) moving the upper die 10 upwards according to the reverse operation of the forming, jacking the blank holder, and taking down the formed product part.

To sum up, the utility model discloses a design into two half convex closure structures with lower mould (terrace die), design into double-deck frame structure with the blank holder simultaneously to restrict the active area of panel beating blank in the second frame region, improve product stamping stability, lead to the unstability problem of wrinkling when solving stamping forming, make before the new forms of energy motorcycle type floor formability better, reduce debug time, promote material utilization ratio, reduce manufacturing cost.

The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, but the present invention is not limited to the above embodiments, and any skilled person familiar with the art can make some changes or modifications to equivalent embodiments of equivalent changes within the technical scope of the present invention without departing from the technical scope of the present invention, but any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the technical scope of the present invention.

Claims

1. The front floor stamping die structure is characterized by comprising an upper die (10), a lower die (20) and a blank holder (30) matched with the upper die (10) and the lower die (20), wherein two sides of the lower die (20) are provided with half convex hulls (21), and edges, far away from each other, of the half convex hulls (21) are flush with the tail end edge of the side part of the lower die (20).

2. The front floor stamping die structure according to claim 1, wherein the upper die (10) is a female die and is a first forming unit provided on a slide block on a machine table, the lower die (20) is a male die and is a second forming unit fixed on a platform under the machine table, and the blank holder (30) is used for limiting the moving area of the sheet metal blank.

3. Front floor stamping die structure according to claim 1, characterized in that the half-convex hulls (21) are symmetrically provided at the edge of the upper surface of the lower die (20).

4. Front floor stamping die structure according to claim 1, characterized in that two half-domes (21) can be spliced to form a dome whole.

5. The front floor stamping die structure according to claim 2, wherein the blank holder (30) includes a through hole (31) penetrating in the middle, and a first frame body (32) and a second frame body (33) surrounding the through hole (31) in the circumferential direction, and the second frame body (33) is provided between the through hole (31) and the first frame body (32).

6. The front floor press mold structure according to claim 5, wherein the through hole (31) is a square hole, and the first frame body (32) and the second frame body (33) are square frame bodies.

7. Front floor stamping die structure according to claim 5 or 6, characterized in that the sheet metal blank active area is the second frame (33) area.