CN218873471U

CN218873471U - Prevent thermoforming mould of plate fracture

Info

Publication number: CN218873471U
Application number: CN202223054258.9U
Authority: CN
Inventors: 郭照宇
Original assignee: Shanghai Bohui Mould Co ltd
Current assignee: Shanghai Bohui Mould Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-04-18
Anticipated expiration: 2032-11-17

Abstract

The utility model belongs to the technical field of the mould technique and specifically relates to a prevent thermoforming mould of plate fracture, including upper die base, die holder, its characterized in that: an upper die cutter block is arranged on one side of the lower end of the upper die base, an upper die material pressing core cutter block is arranged on one side of the upper die cutter block, and the lowest end of the upper die cutter block is higher than that of the upper die material pressing core cutter block; one side of the upper end of the lower die base is provided with a lower blank holder die cutter block, one side of the lower blank holder die cutter block is provided with a lower die cutter block, and two sides of the lower blank holder die cutter block are provided with local breaks. Compared with the prior art, the problem of unstable material feeding and flanging cracking is solved, the stability of mass production is guaranteed, the on-site reforming times are reduced, and the development period of the die is greatly shortened.

Description

Prevent thermoforming mould of plate fracture

Technical Field

The utility model belongs to the technical field of the mould technique and specifically relates to a prevent thermoforming mould of plate fracture.

Background

Along with the development of the mold industry, the development period of the mold is shorter and shorter, and particularly after the localization trend of the hot forming mold, a plurality of parts are directly changed from cold punching parts to hot forming parts to enhance the strength of the automobile body and achieve the aim of lightening the automobile body at the same time. The hot forming is basically completed in one step, and the cold stamping can be realized step by step in a plurality of working procedures, so that the hot forming difficulty of partial parts is far greater than the cold stamping difficulty relative to the cold forming. And the thermoforming mould receives cold and hot alternation to influence mould stability worse, and the stability of volume production is just worse, for reducing the volume production disability rate, solves this kind of turn-ups fracture very urgent.

For parts with upper and lower flanges like a butt plate, when the formability is simulated by using analysis software in the early stage of design, the material feeding of a material sheet is very sensitive, the shapes of the upper and lower flanges of the butt plate are determined, the forming depth of the parts at the upper and lower flanges is deep, and the risk of cracking and wrinkling at corners is avoided. The upper pressing plate can control wrinkling due to dead pressing, but is easy to crack; the increased top platen gap addresses cracking, but the corners may wrinkle. A balance point is found between cracking and wrinkling, and the difficulty in ensuring the stability of mass production is high.

The traditional forming mode is that the main surface of a product is placed flat, the middle of the product is positioned by two holes, and the upper flanging and the lower flanging are pressed by an upper pressing core and a lower pressing core to form the product. The upper and lower pressure plate has more movable cores and complex structure, the number of the movable cores is large, the stability is poor, a time-delay nitrogen cylinder is required to be added, and the cost of the die is increased. The stamping angle determines the forming angle of the side wall, the forming is more difficult, the lateral force of the die is larger, and the grinding and cooling of the side wall of the die have influence on the mechanical performance of the hot forming part. The upper flanging and the lower flanging are formed simultaneously, the upper flanging and the lower flanging need to be fed, the stability of the forming process is poor, and the feeding speed is more difficult to control due to the influence of the movable core gap, so that the flanging risk is higher.

Disclosure of Invention

The utility model provides a thermal forming die for preventing plate cracking, which overcomes the defects of the prior art.

For realizing above-mentioned purpose, design a prevent thermoforming mould of plate fracture, including upper die base, die holder, its characterized in that: an upper die cutter block is arranged on one side of the lower end of the upper die base, an upper die material pressing core cutter block is arranged on one side of the upper die cutter block, and the lowest end of the upper die cutter block is higher than that of the upper die material pressing core cutter block; one side of the upper end of the lower die holder is provided with a lower blank holder die cutter block, one side of the lower blank holder die cutter block is provided with a lower die cutter block, and two sides of the lower blank holder die cutter block are provided with local breaks.

The distance between the upper die cutter block and the upper die pressing core block is 10 mm.

An upper die parting line is arranged between the upper die cutter block and the upper die pressing core block.

The die comprises an upper die base, a lower die base and a positioning block, wherein the upper die base and the lower die base are provided with grooves at the periphery, the positions of the grooves of the upper die base correspond to the positions of the grooves of the lower die base, and the positioning block is arranged in the grooves.

Compared with the prior art, the utility model, solved the unstable problem with the turn-ups fracture of walking the material, guaranteed the stability of volume production, reduce on-the-spot rectification number of times, shorten mould development cycle greatly.

Drawings

Fig. 1 is the schematic diagram of the upper die structure of the present invention.

Fig. 2 is the schematic view of the lower mold structure of the present invention.

Fig. 3 is a schematic view of the positioning block of the present invention.

Fig. 4 is a schematic overall cross-sectional view of the present invention.

Fig. 5 is a schematic overall cross-sectional view of the present invention.

Fig. 6 is a schematic view of a product suitable for the present invention.

Referring to fig. 1-6, wherein 1 is an upper die holder, 2 is an upper die cutter block, 3 is an upper die pressing core cutter block, 4 is a lower edge pressing ring die cutter block, 5 is a lower die cutter block, 6 is a lower die holder, 7 is a groove, 8 is a positioning block, 9 is an upper die parting line, 10 is a partial break, 11 is an upper flanging position, and 12 is a lower flanging position.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-6, an upper die cutter block 2 is arranged on one side of the lower end of an upper die holder 1, an upper die core pressing cutter block 3 is arranged on one side of the upper die cutter block 2, and the lowest end of the upper die cutter block 2 is higher than that of the upper die core pressing cutter block 3; one side of the upper end of the lower die seat 6 is provided with a lower blank holder die cutter block 4, one side of the lower blank holder die cutter block 4 is provided with a lower die cutter block 5, and two sides of the lower blank holder die cutter block 4 are provided with local breaks 10.

The distance between the upper die cutter block 2 and the upper die pressing core block 3 is 10 mm.

An upper die parting line 9 is arranged between the upper die cutter block 2 and the upper die pressing core block 3.

The die comprises an upper die base 1 and a lower die base 6, wherein grooves 7 are formed in the peripheries of the upper die base 1 and the lower die base 6, the positions of the grooves 7 of the upper die base 1 correspond to the positions of the grooves 7 of the lower die base 6, and positioning blocks 8 are arranged in the grooves 7.

The utility model discloses during the use, on the thermoforming panel was put to the die holder 6, fixed a position through locating piece 8, made the shaping more stable.

The upper die cutter block 2 is formed corresponding to the upper flanging 11 of the product, and the upper die pressing core block 3 is formed corresponding to the lower flanging 12 of the product. The lowest end of the upper die cutter block 2 is 10 mm higher than the lowest end of the upper die material pressing core cutter block 3, so that the upper die cutter block 2 can be firstly contacted with a thermal forming sheet material to directly press the upper flanging part 11 for forming, and the problem of wrinkling and material stacking of the upper flanging corner part is solved.

The upper flanging 11 is formed and then the lower flanging 12 is formed again, and the lower edge pressing ring die cutter block 4 is provided with a local break 10 at the position corresponding to the lower flanging 12 at the two sides of the product, so that the lower flanging is stretched freely, the instability of drawing and feeding is avoided, and the cracking is prevented.

The upper template parting line 9 is arranged at the upper part of the lower flanging part 12 of the product, so that the material is prevented from being torn to cause cracking when the product is flanged downwards.

Claims

1. The utility model provides a prevent thermoforming mould of plate fracture, includes upper die base, die holder, its characterized in that: an upper die cutter block (2) is arranged on one side of the lower end of the upper die base (1), an upper die material core cutter block (3) is arranged on one side of the upper die cutter block (2), and the lowest end of the upper die cutter block (2) is higher than that of the upper die material core cutter block (3); one side of the upper end of the lower die seat (6) is provided with a lower blank holder die cutter block (4), one side of the lower blank holder die cutter block (4) is provided with a lower die cutter block (5), and two sides of the lower blank holder die cutter block (4) are provided with local breaks (10).

2. The thermoforming mold for preventing cracking of panels as claimed in claim 1, wherein: the distance between the upper die cutter block (2) and the upper die pressing core cutter block (3) is 10 mm.

3. The thermoforming mold for preventing the cracking of the sheet according to claim 1, wherein: an upper die parting line (9) is arranged between the upper die cutter block (2) and the upper die pressing core cutter block (3).

4. The thermoforming mold for preventing the cracking of the sheet according to claim 1, wherein: the die is characterized in that grooves (7) are formed in the peripheries of the upper die base (1) and the lower die base (6), the positions of the grooves (7) of the upper die base (1) correspond to the positions of the grooves (7) of the lower die base (6), and positioning blocks (8) are arranged in the grooves (7).