阅读说明：本技术 一种轿车后地板拉延模具结构 (Drawing die structure for rear floor of car ) 是由 李晶影 邰伟彬 李刚 王强 于 2019-10-30 设计创作，主要内容包括：一种轿车后地板拉延模具结构,其下模座组件包括下模座及设在下模座的第一凸模、第二凸模、导滑板、墩死块及与气缸相连接的顶料器；下模座上具有压边圈,第一凸模的表面包含后地板产品备胎凹槽的底面和立面型面,第二凸模的表面包含后地板产品法兰面上的部分型面。上模组件包括上模座及设在上模座的上模座凹模及上模座导板,上模座凹模与下模座上的第一凸模和第二凸模匹配。压边圈设在下模座组件和上模座组件之间,压边圈具有导板,压边圈的表面包含后地板产品法兰面上的比较平缓的造型型面。本发明通过双凸模结构,减小了板料尺寸,提高了材料利用率,同时消除了拉延过程中由于板料流动产生的产品的质量缺陷。(A drawing die structure for a rear floor of a car comprises a lower die holder assembly, a first male die, a second male die, a guide sliding plate, a heading block and a material ejector, wherein the first male die, the second male die, the guide sliding plate, the heading block and the material ejector are arranged on the lower die holder; the lower die holder is provided with a blank holder, the surface of the first male die comprises the bottom surface and the vertical surface profile of the groove of the spare tire of the rear floor product, and the surface of the second male die comprises the parting surface on the flange surface of the rear floor product. The upper die assembly comprises an upper die base, an upper die base female die and an upper die base guide plate, wherein the upper die base female die and the upper die base guide plate are arranged on the upper die base, and the upper die base female die is matched with the first male die and the second male die on the lower die base. The blank holder is established between lower die holder subassembly and last die holder subassembly, and the blank holder has the baffle, and the surface of blank holder contains the more gentle molding profile on the floor product flange face of back. According to the invention, through the double convex die structure, the size of the plate is reduced, the material utilization rate is improved, and the quality defect of a product caused by plate flowing in the drawing process is eliminated.)

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 molded surface of a spare tire groove of a rear floor product, and the surface of the second male die (6) comprises a part molded surface on a flange surface of the rear floor product, and is a molded surface with a deeper concave-convex shape.

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

Technical Field

The invention relates to a drawing die, in particular to a drawing die for a rear floor of a car.

Background

The rear floor is an important part in a vehicle body floor assembly, most rear floor spare tire grooves are deep in shape and large in forming difficulty, a trimming line is arranged on a drawing male die in the traditional drawing process, process supplement molding is carried out along the product boundary, and the trimming line is connected with a pressure surface. And the material utilization rate is low, which causes high material cost.

One of the improved processes is that the product part except the spare tire groove can be placed on the pressing surface to reduce the drawing depth, but the product shape placed on the pressing surface is integrally formed along with drawing, so that the initial flowing of the plate is adversely affected.

Disclosure of Invention

The invention aims to solve the defects of the background technology and provide a mold structure of a rear floor, which can ensure the quality of a finished piece and improve the utilization rate of materials.

The invention comprises an upper die holder assembly and a lower die holder assembly;

the lower die holder assembly comprises a lower die holder, a first male die, a second male die, a guide sliding plate, a heading block and a material ejector, wherein the first male die, the second male die, the guide sliding plate, the heading block and the material ejector are arranged on the lower die holder; the lower die base is provided with a blank holder, and the lower die base is provided with a first male die hollowing avoiding groove and a second male die hollowing avoiding groove;

the surface of the first male die comprises a bottom surface and a vertical surface molded surface of a spare tire groove of a rear floor product, and the surface of the second male die comprises a part molded surface on a flange surface of the rear floor product, and the surface is a molded surface with deeper concave-convex modeling.

The upper die assembly comprises an upper die base, an upper die base female die and an upper die base guide plate, wherein the upper die base female die and the upper die base guide plate are arranged on the upper die base, and the upper die base female die is matched with the first male die and the second male die on the lower die base.

The blank holder is arranged between the lower die holder component and the upper die holder component and is provided with a guide plate, and the guide plate of the blank holder and the upper die holder complete die assembly.

The surface of the binder ring comprises a relatively flat profiled surface on the flange side of the rear floor product.

The working principle of the invention is as follows:

the second-level drag rod on the blank holder is jacked up by the pressure provided by the equipment, and the blank holder moves relative to the lower die holder through the guide plate. The female die of the upper die base is matched and pressed with the blank holder, and the molded surface of the rear floor arranged on the blank holder is molded in the process. Then the upper die holder and the blank holder move together, and are matched with the guide sliding plate of the lower die holder and move relative to the lower die holder. And (3) performing flow forming on the plate, matching the first male die and the second male die with the female die of the upper die base until the pressure plate is contacted with the upsetting block of the lower die base, forming to the bottom, and finishing the drawing process of the rear floor.

The working process of the invention is as follows:

the blank holder is matched with the lower die holder through a guide plate, the blank holder moves upwards under the jacking force of equipment, when the blank holder is static, the upper die holder starts to move downwards and contacts with the blank holder to be matched with the blank holder through the guide plate of the upper die holder and the blank holder, the molding surface on the blank holder is molded on a sheet material, and the first male die and the second male die start to work along with the downward movement of the upper die holder and the blank holder. And when the lower supporting plane of the blank holder is attached to the upsetting block of the lower die holder, closing the upper die and the lower die, and finishing the drawing forming of the workpiece.

The shape of the rear floor part is contained on the blank holder besides the first male die and the second male die, so that a traditional process supplement part is omitted, materials are saved, the material utilization rate is improved, and the molded surface with large concave-convex change of a product is arranged on the second male die, so that the defect of the part caused by the flowing of a plate material on the molded surface with a complex shape is eliminated.

The invention has the beneficial effects that:

through the double convex die structure of the first convex die and the second convex die, the process supplement modeling of the drawing process is cancelled, the trimming line is arranged on the pressure surface, the size of the plate is reduced, the material utilization rate is improved, the material cost is reduced, and the quality defect of the product caused by the flow of the plate in the drawing process is eliminated.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a perspective view of the lower die holder of the present invention.

FIG. 3 is a schematic view of a blank holder of the present invention.

Detailed Description

As shown in fig. 1, 2 and 3, the present invention includes an upper die holder assembly and a lower die holder assembly;

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, the structure of the blank holder 2 is shown in figures 1 and 3, 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 molded surface of a spare tire groove of a rear floor product, and the surface of the second male die 6 comprises a part molded surface on a flange surface of the rear floor product, and is a molded surface with deeper concave-convex modeling.

The upper die assembly comprises an upper die base 3, an upper die base female die 13 and an upper die base guide plate 4, wherein the upper die base female die 13 is arranged on the upper die base 3, and the upper die base female die 13 is matched with the first male die 5 and the second male die 6 on the lower die base 1.

The blank holder 2 is arranged between the lower die holder component and the upper die holder component, 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 2 comprises a relatively gentle profiling 12 on the flange side of the rear floor product.

The working principle of the invention is as follows:

the secondary towing rod on the blank holder 2 is jacked up by the pressure provided by the equipment, and at the moment, the blank holder 2 and the lower die holder 1 move relatively through the guide plate 11. The upper die base female die 13 is matched and pressed with the blank holder 2, and the molded surface of the rear floor arranged on the blank holder 2 is molded in the process. The upper die holder 3 and the blank holder 2 move together and simultaneously move relative to the lower die holder 1 by being matched with the guide sliding plate 7 of the lower die holder 1. And (3) performing flow forming on the plate, matching the first male die 5 and the second male die 6 with the female die 1 of the upper die base until the pressure plate is contacted with the upsetting block 8 of the lower die base 1, forming to the bottom, and finishing the drawing process of the rear floor.

The working process of the invention is as follows:

as shown in fig. 1, the blank holder 2 is matched with the lower die holder 1 through a guide plate 11, the blank holder 2 moves upwards under the jacking force of equipment, when the blank holder 2 is static, the upper die holder 3 starts to move downwards and contacts with the blank holder 2, the blank holder 2 is matched with the blank holder through an upper die holder guide plate 4, the molding surface 12 on the blank holder 2 is molded on a sheet material, and the first male die 5 and the second male die 6 start to work along with the downward movement of the upper die holder 3 and the blank holder 2. And when the supporting plane at the lower part of the blank holder 2 is attached to the upsetting block 8 of the lower die holder 1, closing the upper die and the lower die, and finishing the drawing forming of the workpiece.

The shape of the rear floor part is contained on the blank holder 2 besides the first male die 5 and the second male die 6, so that the traditional process supplement part is omitted, the material is saved, the material utilization rate is improved, and the molded surface with large concave-convex change of the product is arranged on the second male die 6, so that the defect of the part caused by the flowing of the plate on the molded surface with a complex shape is eliminated.