CN211588232U

CN211588232U - Stamping die draw bead structure

Info

Publication number: CN211588232U
Application number: CN201921729616.7U
Authority: CN
Inventors: 陈亮
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-09-29
Anticipated expiration: 2029-10-14

Abstract

A drawing rib structure of a stamping die comprises a plurality of discontinuous drawing ribs arranged according to the number and the positions of waste cutters, wherein each drawing rib comprises a main drawing rib section and a secondary drawing rib section, an inflection point is arranged at the junction of the main drawing rib section and the secondary drawing rib section, and a break point is arranged between the secondary drawing ribs.

Description

Stamping die draw bead structure

Technical Field

The utility model relates to an automobile body makes technical field, especially relates to a stamping die draw bead structure.

Background

The manufacturing process of the automobile covering part generally comprises the working procedures of drawing, trimming and punching, side trimming and punching, shaping and the like. Wherein the drawing process plays a crucial role in the surface quality of the covering element.

The drawing step is a stamping step in which a flat sheet material is changed into a desired shape by using a stretch film. And (3) delaying, descending the female die to enable the material sheet to be pressed between the female die and the pressure plate, then clamping the material sheet by the female die and the pressure plate to continue descending, and starting stretch forming of the product when the female die and the male die are contacted until the female die and the male die are completely closed, so that the product is completely drawn and formed.

In the drawing process, the draw bead on the stamping die has the function of adjusting the material inflow in the drawing process, and can ensure that the plate is fully plastically deformed and meet the requirement of system rigidity. In the trimming process after drawing, the scrap cutter is in a vertical edge state at the side wall of the draw bead, the side wall of the draw bead is repeatedly squeezed and cracked, a large amount of scraps are generated in the die, the scraps are easy to be stained on the surface of the die body, and the problems of crushing and scratching are generated on the surface of a part and the like.

Existing solutions to reduce trim debris include a stepped trim configuration and a suction/blow configuration. The grading trimming structure is used for separately designing the trimming knife and the waste material knife, after the trimming knife finishes integral trimming, the die is opened, the waste material falls to the lower die waste material knife through the guide sliding rod, after the die is closed in the next stamping stroke, the waste material is cut off through the upper die waste material knife and the lower die waste material knife, and the waste material is discharged out of the die. The structure only guides the waste to the outside far away from the male die product area for cutting the waste, a large amount of scraps are still generated, and the grading trimming structure is easy to increase the size of the die and increase the cost of the die; the air suction/blowing structure is characterized in that a blowing mechanism is arranged in the trimming and punching die, chips are blown out of the die by air in a compressor, or a suction device is arranged in the die, vacuum is generated between an air inlet end and an air suction port by the aid of a Venturi principle, and the chips generated by trimming are sucked under the action of external atmosphere.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a stamping die draw bead structure that can effectively reduce the production of aluminum plate deburring piece.

The utility model provides a stamping die draw bead structure includes multistage spaced draw bead, can make the normal direction face of waste material sword be located between the adjacent draw bead.

Further, the drawing rib is arranged along the circumferential direction of the die parting line of the stamping die.

Furthermore, the draw bead comprises a main draw bead section and auxiliary draw bead sections arranged at two ends of the main draw bead section.

Furthermore, an inflection point is formed at the junction of the main draw bead section and the auxiliary draw bead section, a break point is formed at the tail end of the auxiliary draw bead section, the main draw bead section is arranged along the circumferential direction of the stamping die, and the auxiliary draw bead section is bent towards the outer side of the stamping die along the direction from the break point to the inflection point.

Furthermore, the two auxiliary sections of the drawing beads of each drawing bead are arranged into a splayed shape.

Further, the adjacent break points of the adjacent draw beads are spaced by a distance which is more than or equal to 10 mm.

Further, the distance between the normal surface of the scrap cutter and the break points of the draw beads at the two sides of the scrap cutter is more than or equal to 5 mm.

Furthermore, an included angle which is larger than or equal to 160 degrees and smaller than or equal to 175 degrees is formed between a connecting line between two adjacent inflection points on the same drawing rib and a connecting line between any inflection point on the same drawing rib and a breakpoint adjacent to the inflection point.

Further, the number of the drawing beads is more than or equal to that of the scrap knives.

Further, the scrap cutter trims the press-formed product in sections in a direction perpendicular to a normal plane of the scrap cutter.

The utility model discloses a stamping die draw bead structure reachs through CAE software analysis and CAD design, through the position segmentation design with the draw bead according to the waste material sword to design the interior splayed of draw bead itself for having the flexion, avoided the clastic production of aluminium in the deburring process, improved product surface quality's qualification rate, reduced clear up clastic man-hour, need not additionally increase equipment, do not occupy the mould space.

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 the utility model provides a schematic diagram of stamping die draw bead structure.

Fig. 2 is the schematic diagram of the stamping die draw bead structure with the normal plane of the scrap cutter provided by the utility model.

FIG. 3 is a schematic view of the inflection and break points of a draw bead.

FIG. 4 is a schematic view of two adjacent break points of the bead and the normal plane of the scrap knife.

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.

It should be noted that the present invention relates to a stamping die draw bead structure, which is mainly used for manufacturing aluminum alloy covering parts, such as a hair cover outer plate, a top cover outer plate, etc.

The stamping die draw bead structure is arranged on stamping dies such as a female die and a pressure plate and is used for adjusting the inflow of materials in the drawing process.

The following description will be given taking as an example that the structure of the draw bead of the press die is located on the draw die face of the hood cavity die.

Referring to fig. 1 and 2, the drawbead structure of the stamping die of the present invention includes a plurality of segments of spaced drawbeads 1, wherein the drawbeads 1 are disposed around the cavity of the stamping die 2 according to the trimming position of the scrap knife, and the number of the drawbeads 1 is greater than or equal to the number of the scrap knives. In the embodiment, as twenty waste cutters participate in the bypass cutting of the waste, in order to avoid aluminum scraps caused by shearing and extruding of the aluminum plate at the position of the draw bead 1 by the waste cutters, the draw bead 1 is broken at the position of the waste cutters according to the arrangement positions of the waste cutters, and twenty sections of the draw beads 1 are total.

Referring also to fig. 3, the draw bead 1 includes a main draw bead section 11 and a sub-draw bead section 12. The main draw bead section 11 is circumferentially arranged around a cavity of the stamping die 2, and the shape of the main draw bead section 11 is basically consistent with the shape of the cavity of the stamping die 2 at the corresponding position. In the illustrated embodiment, the main bead sections 11 located at the more gradual portions of the hair-pin cavity are substantially linear, and the main bead sections 11 located at the straight corners of the hair-pin cavity are substantially arc-shaped. The main brake bead section 11 is provided with a brake bead auxiliary section 12, and the brake bead main section 11 is provided with a brake bead auxiliary section 12, and the brake bead auxiliary section 12 is provided with a brake bead auxiliary section 12. In addition, the draw bead 1 is also formed with break points 1b at both ends thereof, i.e., the ends of the sub-draw-bead sections 12. The two auxiliary brake bead sections 12 are bent towards the outer side of the stamping die 2 along the direction from the breaking point 1b to the inflection point 1a, so that the two auxiliary brake bead sections 12 are arranged in a shape of a Chinese character 'Bayonet'. An included angle β is formed between a line between inflection points 1a of the respective draw beads 1 and a line between the inflection point 1a and the adjacent break point 1b, and in an embodiment of the present invention, the included angle β is equal to or greater than 160 ° and equal to or less than 175 °.

Furthermore, referring to fig. 4, a certain distance L1 is provided between adjacent break points 1b of adjacent draw beads 1, so that the multi-section draw bead 1 of the stamping die draw bead structure of the present invention is discontinuous. The utility model discloses an embodiment, distance L1 between the adjacent breakpoint 1b of adjacent brake bead 1 is more than or equal to 10mm to, the normal direction face 3 of waste material sword is located between the adjacent breakpoint 1b of adjacent brake bead 1, makes all waste material sword normal direction faces 3 set up along stamping die 2's die cavity circumference, and the waste material sword is along the cutting of product die face outer lane between adjacent brake bead 1 in the deburring process. In one embodiment of the present invention, the distance L2 between the normal plane 3 of the scrap knife and the break points 1b of the draw beads 1 on both sides thereof is 5mm or more.

The utility model discloses a stamping die draw bead structure is mainly through leading-in the product digifax of aluminum alloy covering into the automatic simulation analysis software, carries out CAE analysis, obtains reference drawing die face and draw bead coefficient; then, constructing a drawing die surface in CAD software according to the reference drawing die surface and the drawing rib coefficient; then, the drawing die surface is further improved in CAD software, and the related work contents such as trimming, punching, and shaping are introduced to produce a drawing DL drawing (drawing of die process component).

According to the utility model discloses a stamping die draw bead structure, in the drawing process, draw bead 1 control sheet material flows in and guarantees that product plastic deformation is abundant. In the trimming process, the trimming knife cuts off stripped waste from the boundary of a punch-formed product along the direction vertical to the normal surface 3 of the waste knife, the waste knife carries out sectional trimming on the waste, the waste is discharged out of the die, and because the shearing position of the waste knife is positioned between the corresponding breakpoints 1b of the adjacent draw beads 1, the normal surface 3 of the waste knife has no structure of the draw beads 1, namely, aluminum scraps caused by extruding and cutting the draw beads 1 by the waste knife are not generated at the position, so that the generation of the aluminum scraps in the trimming process is reduced.

To sum up, the utility model discloses a stamping die draw bead structure reachs through CAE software analysis and CAD design, through the position segmentation design with the draw bead according to the waste material sword to design draw bead itself for having the interior splayed of flexion, avoided the production of aluminium piece in the deburring process, improved product surface quality's qualification rate, reduced the clastic man-hour of clearance, need not additionally increase equipment, do not occupy the mould space.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the present invention.

Claims

1. The utility model provides a stamping die draw bead structure which characterized in that: the device comprises a plurality of sections of drawing beads (1) at intervals, and the normal surface (3) of a scrap cutter can be positioned between the adjacent drawing beads (1).

2. The stamping die draw bead structure of claim 1, wherein: the drawing rib (1) is arranged along the circumferential direction of a parting line of the stamping die (2).

3. The stamping die draw bead structure of claim 1, wherein: the draw bead (1) comprises a draw bead main section (11) and draw bead auxiliary sections (12) arranged at two ends of the draw bead main section (11).

4. The stamping die draw bead structure of claim 3, wherein: an inflection point (1a) is formed at the junction of the main draw bead section (11) and the auxiliary draw bead section (12), a break point (1b) is formed at the tail end of the auxiliary draw bead section (12), the main draw bead section (11) is arranged along the circumferential direction of the stamping die, and the auxiliary draw bead section (12) is bent towards the outer side of the stamping die (2) along the direction from the break point (1b) to the inflection point (1 a).

5. The stamping die draw bead structure of claim 4, wherein: the two auxiliary brake bead sections (12) of each brake bead (1) are arranged in a splayed shape.

6. The stamping die draw bead structure of claim 4, wherein: the distance between adjacent break points (1b) of adjacent draw beads (1) is more than or equal to 10 mm.

7. The stamping die draw bead structure of claim 4, wherein: the distance between the normal surface (3) of the scrap cutter and the break points (1b) of the draw beads (1) on the two sides of the scrap cutter is more than or equal to 5 mm.

8. The stamping die draw bead structure of claim 4, wherein: an included angle which is more than or equal to 160 degrees and less than or equal to 175 degrees is formed between a connecting line between two adjacent inflection points (1a) on the same drawing rib (1) and a connecting line between any inflection point (1a) and a breakpoint (1b) adjacent to the inflection point on the same drawing rib (1).

9. The stamping die draw bead structure of claim 1, wherein: the number of the drawing beads (1) is more than or equal to that of the scrap knives.

10. The stamping die draw bead structure of claim 1, wherein: the waste material knife cuts the punch forming products in a sectional mode along the direction perpendicular to the normal surface (3) of the waste material knife.