CN210098707U - A front floor stamping die structure - Google Patents

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

A front floor stamping die structure

technical field

The utility model relates to the field of automobile parts processing, in particular to a front floor stamping die structure.

Background technique

In the automotive industry, as the market demand for new energy vehicles gradually increases, the difference between the new energy vehicle body-in-white and the traditional vehicle body-in-white puts forward more stringent requirements for the formability and manufacturing process of body stamping parts. The front floor of the existing new energy vehicles generally includes two types of middle half convex hull drawn flanging and extruded profiles. Among them, the intermediate convex hull drawn flanging needs to be stamped and formed. This part feature proposes a higher formability of the part. requirements.

At present, the front floor molds of new energy vehicles are often drawn (drawing, puncturing) → trimming, punching → shaping, trimming, and flanging, and the three processes are completed. Especially in the third process, there are many processes and it is difficult to debug the mold. Therefore, the stamping of the front floor of the car mainly has the following situations:

(1) The front floor is spliced, and the convex hull is inward, so that the parts are not fully formed, the corner area is easy to wrinkle, and the side wall of the convex hull is easy to crack;

(2) During the debugging process, the state of the flat panel area is unstable;

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

As shown in Figure 1, in the existing first technical solution, by adding a piercing knife 2 on the die 1, when the piercing knife 2 starts to work 10mm before the bottom of the mold, the piercing knife 2 will pierce the sheet metal waste area to prevent pulling Extended cracking, but the movement of this scheme is complex, increasing the steel block, increasing the manufacturing cost and reducing the material utilization rate;

FIG. 2 is a schematic view of the structure of the punch 3 passing through the blank holder 5. As shown in FIG. 2, in the existing second technical solution, the R angle (rounded corner) of the root of the convex hull 4 on the punch 3 is enlarged in the drawing stage. ) to increase the strong pressure in the peripheral area of the R angle on the convex hull 4, and then restore the R angle to the original size during the post-processing process to prevent drawing cracking. This solution requires two moldings, the parts are easy to wrinkle and the debugging is complicated.

Utility model content

In view of this, it is necessary to provide a front floor stamping die structure that can improve stamping stability and avoid forming wrinkles.

The utility model provides a front floor stamping die structure, which comprises an upper die, a lower die and a blank holder matched with the upper die and the lower die, and two semi-convex hulls are arranged on both sides of the lower die , the mutually distant edges of the semi-convex hull are flush with the edge of the side end of the lower die.

Further, the upper mold is a concave mold and is a first molding unit arranged on a slide block on the machine table, the lower mold is a convex mold and is a second molding unit fixed on the lower platform of the machine table, the The blank holder is used to limit the active area of the sheet metal blank.

Further, the semi-convex hull is symmetrically arranged at the edge of the upper surface of the lower die.

Further, the two semi-convex hulls can be joined together to form a whole convex hull.

Further, the blank holder includes a through hole through the middle, and a first frame body and a second frame body arranged around the through hole in the circumferential direction, and the first frame body is arranged between the through hole and the through hole. between the second frame.

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

Further, the active area of the sheet metal blank is the second frame area.

To sum up, in the present invention, the lower die (punch) is designed as a double-half convex hull structure, and the blank holder is designed as a double-layer frame structure, and the active area of the sheet metal blank is limited to the second frame body area. , Improve product stamping stability, avoid the problem of wrinkling caused by stamping instability, make the front floor of new energy vehicles better, reduce debugging time, improve material utilization, and reduce manufacturing costs.

The above description is only an overview of the technical solution of the present invention, in order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the contents of the description, and in order to make the above-mentioned and other purposes, features and advantages of the present invention better. It is obvious and easy to understand, and the preferred embodiments are exemplified below, and the detailed description is as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the upper die (concave die) in the front floor stamping die structure in the existing first technical solution;

2 is a schematic structural diagram of a lower die (punch die) passing through the blank holder ring in the front floor stamping die structure in the existing second technical solution;

3 is a schematic structural diagram of a specific embodiment of the front floor stamping die structure of the present invention;

Fig. 4 is the structural representation of the upper die (concave die) in Fig. 3;

Fig. 5 is the structural representation of the edge holder ring in Fig. 3;

Fig. 6 is the top view of the edge holder ring in Fig. 3;

Fig. 7 is the structural representation of the lower die (punch) in Fig. 3;

FIG. 8 is a top view of the lower mold (punch) in FIG. 3 .

Detailed ways

In order to further illustrate the technical means and effects adopted by the present utility model to achieve the intended purpose of the utility model, the present utility model is described in detail below with reference to the accompanying drawings and preferred embodiments.

As shown in FIG. 3 to FIG. 8 , the present invention provides a front floor stamping die structure, which includes an upper die 10 , a lower die 20 and a blank holder 30 .

As shown in FIG. 3 , FIG. 4 , FIG. 5 and FIG. 7 , in the present invention, the upper mold 10 is a concave mold, and the lower mold 20 is a convex mold. Specifically, the upper die 10 is the first forming unit arranged on the slide block on the machine table, the lower die 20 is the second forming unit fixed on the lower platform of the machine table, and the blank holder 30 is used to limit the movement of the sheet metal blank. In the area unit, the upper die 10 and the lower die 20 are matched with the blank holder 30 respectively, and the front floor die of the new energy vehicle is obtained by stamping.

Further, as shown in FIG. 5 and FIG. 6 , the blank holder 30 includes a through hole 31 penetrating through the middle, and a first frame body 32 and a second frame body 33 surrounding the through hole 31 in the circumferential direction. The body 33 is arranged between the through hole 31 and the first frame body 32, the lower mold 20 is provided with half convex hulls 21 on both sides, and the entire profile of the lower mold 20 (including the two half convex hulls 21) is stamped and formed on the front floor During the process of closing the mold, the through hole 31 is passed through, and the blank holder 30 is pushed up between the upper mold 10 and the lower mold 20 when the mold is opened. The active area of the sheet metal blank is the area of the second frame 33, that is, the sheet metal blank. The gold blank is confined within the area of the second frame body 33 .

By limiting the movable range of the sheet metal blank to the second frame body 33, the utility model makes the formability of the front floor of the new energy vehicle model better, reduces the debugging time, improves the material utilization rate, and reduces the manufacturing cost. In a preferred embodiment, the through hole 31 is a square hole, and the first frame body 32 and the second frame body 33 are square frame bodies.

As shown in FIG. 7 and FIG. 8 , the lower die 20 provided by the present invention has a double-convex hull structure, which improves the stamping stability of the product and solves the problem of instability and wrinkling during stamping. Specifically, in this specific embodiment, The half-convex hulls 21 are symmetrically arranged at the edge of the upper surface of the lower die 20, and the mutually distant edges (bottom side edges) of the two half-convex hulls 21 are flush with the side end edges of the lower die 20. The provided double-convex hulls (two semi-convex hulls 21 ) have relatively high sidewalls and no products on the sidewalls, and the blanks can flow to the sidewalls during the molding process, which is beneficial to improve material utilization.

In the present invention, the two semi-convex hulls 21 can be spliced together to form a whole convex hull; specifically, the formed product is cut along the middle axis relative to the two semi-convex hulls, and the cut part is moved to a position where The edges of the two half convex hulls are aligned and then welded to form the final panel with the full convex hull.

When using this mold, first lift the blank holder 30 higher than the top surface of the lower mold 20 (punch mold), then put the sheet metal blank of the workpiece, and the slider on the machine table drives the upper mold 10 (drawing die) Go down, when the upper die 10 (drawing die) goes down to fit with the profile of the blank holder 30, the forming of the initial sheet metal blank of the part is completed; then the blank holder 30 and the upper die 10 continue to descend to make the sheet metal The blank is in contact with the lower die 20 (drawing double punch) fixed on the lower platform of the machine, and the overall shape of the part starts to be formed; finally, the die formed by the upper die 10, the blank holder 30 and the lower die 20 is continued. When it goes down to the bottom dead center, the entire shape of the part is completed. According to the reverse operation of forming, the upper die 10 is moved upward, the blank holder is lifted up, and the formed product parts are removed.

To sum up, in the present invention, the lower die (punch die) is designed as a double-half convex hull structure, and the blank holder is designed as a double-layer frame structure, so as to limit the active area of the sheet metal blank to the second frame It can improve the stamping stability of the product, solve the problem of instability and wrinkling during stamping, and make the front floor of the new energy vehicle more formable, reduce the debugging time, improve the material utilization rate, and reduce the manufacturing cost.

The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Professional and technical personnel, within the scope of the technical solution of the present invention, can make some changes or modifications to equivalent examples of equivalent changes by using the technical content disclosed above, provided that the content of the technical solution of the present invention is not departed from , any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (7)

1. A front floor stamping die structure, characterized in that it comprises an upper die (10), a lower die (20) and a blank holder (30) matched with the upper die (10) and the lower die (20). ), half convex hulls (21) are provided on both sides of the lower die (20), and the mutually distant edges of the half convex hulls (21) are flush with the side end edges of the lower die (20). 2. The front floor stamping die structure according to claim 1, characterized in that the upper die (10) is a concave die and is a first forming unit arranged on a slider on the machine table, and the lower die (10) 20) is a punch and is a second forming unit fixed on the lower platform of the machine table, and the blank holder (30) is used to limit the active area of the sheet metal blank. 3 . The front floor stamping die structure according to claim 1 , wherein the semi-convex hull ( 21 ) is symmetrically arranged at the edge of the upper surface of the lower die ( 20 ). 4 . 4 . The front floor stamping die structure according to claim 1 , wherein the two semi-convex hulls ( 21 ) can be joined together to form a whole convex hull. 5 . 5 . The front floor stamping die structure according to claim 2 , wherein the blank holder ( 30 ) comprises a through hole ( 31 ) penetrating through the middle part, and a hole ( 31 ) surrounding the through hole ( 31 ) in the circumferential direction. 6 . The first frame body (32) and the second frame body (33) are provided between the through hole (31) and the first frame body (32). 6. The front floor stamping die 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. 7. The front floor stamping die structure according to claim 5 or 6, wherein the active area of the sheet metal blank is the area of the second frame body (33).

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