CN211539138U - A drawing die structure for the rear floor of a car - Google Patents

Abstract

A drawing die structure for the rear floor of a car, the lower die base assembly includes a lower die base, a first punch, a second punch, a guide plate, a pier block and an ejector connected to a cylinder set on the lower die base ; There is a blank holder on the lower die base, the surface of the first punch includes the bottom surface and elevation profile of the spare tire groove of the rear floor product, and the surface of the second punch includes part of the profile on the flange surface of the rear floor product . The upper die assembly includes an upper die base, an upper die base concave die and an upper die base guide plate arranged on the upper die base, and the upper die base concave die matches the first and second punches on the lower die base. The blank holder ring is arranged between the lower die base assembly and the upper die base assembly, the blank holder ring has a guide plate, and the surface of the blank holder ring includes a relatively gentle modeling surface on the flange surface of the rear floor product. The utility model reduces the size of the sheet metal, improves the utilization rate of the material, and simultaneously eliminates the quality defect of the product due to the flow of the sheet metal during the drawing process through the double-pull die structure.

Description

A drawing die structure for the rear floor of a car

technical field

The utility model relates to a drawing die, in particular to a drawing die for the rear floor of a car.

Background technique

The rear floor is an important part of the body floor assembly. Most of the rear floor spare tires have deep grooves and are difficult to form. In the traditional drawing process, the trimming line is set on the drawing punch, and the process is supplemented along the product boundary. The shape is connected to the binder surface, which further increases the drawing depth, and is prone to cracking and necking risks during drawing. And the material utilization rate is low, resulting in high material cost.

One of the improved processes is that the part of the product other than the groove of the spare tire can be placed on the binder surface, which can reduce the drawing depth, but the shape of the product placed on the binder surface is integrally formed with the drawing, which has a negative impact on the initial flow of the sheet. Negative Effects.

SUMMARY OF THE INVENTION

The purpose of this utility model is to solve the above-mentioned deficiencies of the background technology, and to provide a mold structure for the rear floor which can not only ensure the quality of the parts, but also improve the utilization rate of materials.

The utility model comprises an upper die base assembly and a lower die base assembly;

The lower die base assembly includes a lower die base, a first punch, a second punch, a guide plate, a block block and an ejector connected to the cylinder; the lower die base is provided with a blank holder ring, the lower die base is provided with a first punch hollowing and avoiding groove and a second punching hollowing and avoiding groove;

The surface of the first punch includes the bottom surface and the elevation profile of the spare tire groove of the rear floor product, and the surface of the second punch includes part of the profile on the flange surface of the rear floor product, which is a profile with deep concave and convex shapes.

The upper die base assembly includes an upper die base, an upper die base concave die and an upper die base guide plate arranged on the upper die base, and the upper die base concave die matches the first punch and the second punch on the lower die base. .

The blank holder ring is arranged between the lower die base assembly and the upper die holder assembly, the blank holder ring has a guide plate, and the guide plate of the blank holder ring and the upper die holder complete the mold clamping action.

The surface of the blank holder contains a relatively gentle profile on the flange surface of the rear floor product.

The working principle of the present utility model:

The secondary tow bar on the blank holder is pushed up by the pressure provided by the equipment. At this time, the blank holder moves relative to the lower die seat through the guide plate. The concave die of the upper die seat and the blank holder are pressed together, and the rear floor profile set on the blank holder is formed during this process. Then, the upper die holder and the blank holder move together, and by cooperating with the guide plate of the lower die holder, they move relative to the lower die holder at the same time. Sheet metal flow forming, the first punch and the second punch are matched with the upper die base, until the pressing plate contacts the dead block of the lower die base, forming to the end, and the rear floor completes the drawing process.

The working process of the utility model:

The blank holder is matched with the lower die holder through the guide plate, and the blank holder is moved upward by the jacking force of the equipment. When the blank holder is stationary, the upper die holder starts to move downward, and contacts with the blank holder through the upper die holder guide plate and the blank holder. Ring and close the mold. At this time, the molding surface on the blank holder is formed on the sheet material. As the upper die seat and the blank holder move downward together, the first punch and the second punch start to work. When the lower support plane of the blank holder is in contact with the dead block of the lower die base, the upper die and the lower die are closed, and the drawing of the part is completed.

The shape of the rear floor part of the utility model is not only included in the first punch and the second punch, but also included in the blank holder, the traditional process supplementary part is omitted, the material is saved, and the material utilization is improved. Moreover, the profile surface with large variation in product concave and convex is arranged on the second punch, which eliminates the defect of the product caused by the flow of the sheet material on the profile surface with complex shape.

The beneficial effects of the present utility model:

Through the double punch structure of the first punch and the second punch, the supplementary modeling of the drawing process is cancelled, the trimming line is set on the pressing surface, the size of the sheet is reduced, and the material utilization rate is improved. Material costs are reduced, while product quality defects due to sheet flow during drawing are eliminated.

Description of drawings

Figure 1 is a cross-sectional view of the utility model.

FIG. 2 is a three-dimensional schematic diagram of a lower die seat of the present invention.

3 is a schematic diagram of a blank holder of the present invention.

Detailed ways

As shown in Figure 1, Figure 2 and Figure 3, the utility model includes an upper die base assembly and a lower die base assembly;

The lower die base assembly includes a lower die base 1 and a first punch 5, a second punch 6, a guide plate 7, a dead block 8 and an ejector 14 connected to the cylinder; The lower die base 1 is provided with a blank holder ring 2. The structure of the blank holder ring 2 is shown in Figures 1 and 3. The lower die holder 1 has a first punch hollowing and avoiding groove 9 and a second punching hollowing and avoiding groove. 10;

The surface of the first punch 5 includes the bottom surface and the elevation profile of the spare tire groove of the rear floor product, and the surface of the second punch 6 includes part of the profile on the flange surface of the rear floor product, which is a type with deep concave and convex shapes. noodle.

The upper die base assembly includes an upper die base 3, an upper die base concave die 13 and an upper die base guide plate 4 arranged on the upper die base 3, an upper die base concave die 13 and a first punch on the lower die base 1. 5 and the second punch 6 are matched.

The said blank holder 2 is arranged between the lower die base assembly and the upper die holder assembly, the blank holder 2 has a guide plate 11, and the guide plate 11 of the blank holder 2 and the upper die holder 3 complete the mold clamping action.

The surface of the blank holder 2 includes a relatively gentle molding profile 12 on the flange surface of the rear floor product.

The working principle of the present utility model:

The secondary tow bar on the blank holder 2 is pushed up by the pressure provided by the equipment, and at this time the blank holder 2 moves relative to the lower die base 1 through the guide plate 11. The upper die seat concave die 13 cooperates with the blank holder ring 2 to be pressed tightly, and the rear floor profile provided on the blank holder ring 2 is formed during this process. Then the upper die holder 3 and the blank holder 2 move together, and at the same time move relative to the lower die holder 1 by cooperating with the guide plate 7 of the lower die holder 1 . Sheet metal flow forming, the first punch 5 and the second punch 6 are matched with the upper die base 1 until the pressing plate is in contact with the die block 8 of the lower die base 1, forming to the end, and the rear floor completes the drawing process .

The working process of the utility model:

As shown in Figure 1, the blank holder 2 and the lower die base 1 are matched through the guide plate 11, and the blank holder 2 is moved upward by the jacking force of the equipment. When the blank holder 2 is stationary, the upper die holder 3 starts to move downward, and is moved downward with the The blank holder 2 is in contact with the blank holder 2 through the guide plate 4 of the upper die base, and at this time, the molding surface 12 on the blank holder 2 is formed on the sheet material, and the upper die holder 3 and the blank holder 2 move toward each other together. Down movement, the first punch 5 and the second punch 6 start to work. When the lower support plane of the blank holder 2 is in contact with the dead block 8 of the lower die base 1, the upper die and the lower die are closed, and the drawing of the part is completed.

The shape of the rear floor part of the present invention is not only included in the first punch 5 and the second punch 6, but also included in the blank holder 2, which saves the traditional process supplementary part, saves materials, and improves the The material utilization rate is improved, and the profile surface with large variation in product concave and convex is arranged on the second punch 6, which eliminates the defect of the workpiece caused by the flow of the sheet material on the profile surface with complex shape.

Claims (1)

1. A car rear floor drawing die structure is characterized in that: comprises an upper die holder component and a lower die holder component;

the lower die holder assembly comprises a lower die holder (1), a first male die (5), a second male die (6), a guide sliding plate (7), a heading block (8) and a material ejector (14) connected with an air cylinder, wherein the first male die (5) and the second male die (6) are arranged on the lower die holder (1); the lower die holder (1) is provided with a blank holder (2), and the lower die holder (1) is provided with a first male die hollowing avoiding groove (9) and a second male die hollowing avoiding groove (10);

the surface of the first male die (5) comprises a bottom surface and a vertical surface profile of a spare tire groove of a rear floor product, and the surface of the second male die (6) comprises a part profile on a flange surface of the rear floor product, and is a profile with a deeper concave-convex shape;

the upper die holder assembly comprises an upper die holder (3), an upper die holder female die (13) and an upper die holder guide plate (4), wherein the upper die holder female die (13) is arranged on the upper die holder (3), and the upper die holder female die (13) is matched with a first male die (5) and a second male die (6) on the lower die holder (1);

the blank holder (2) is arranged between the lower die holder assembly and the upper die holder assembly, the blank holder (2) is provided with a guide plate (11), and the guide plate (11) of the blank holder (2) and the upper die holder (3) complete die assembly;

the surface of the binder ring (2) comprises a relatively gentle profiling (12) on the flange face of the rear floor product.

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