CN213256629U

CN213256629U - Double-acting drawing die structure

Info

Publication number: CN213256629U
Application number: CN202021510429.2U
Authority: CN
Inventors: 段宇航; 吴秀兰
Original assignee: Xiangyang Haorui Mold Co ltd
Current assignee: Xiangyang Haorui Mold Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-05-25
Anticipated expiration: 2030-07-27

Abstract

The double-acting drawing die structure relates to the field of automobile product processing, and comprises an upper die body, a lower die body and a blank holder, wherein the upper die body comprises an upper die base and two female dies arranged on the upper die base in a mirror symmetry manner, and a concave guide groove is arranged beside each female die; the lower die body comprises a lower die base and two male dies which are arranged on the lower die base and correspondingly matched with the female dies; the lower die base is provided with a convex boss which is convex and correspondingly matched with the guide groove; the blank holders are arranged on the lower die holder and can move up and down relative to the lower die holder, the number of the blank holders is two, each blank holder surrounds the edge of each male die, and each blank holder is provided with an avoidance notch corresponding to the boss; the two corresponding female dies and male dies are arranged in one die cavity according to the left and right parts, and the two corresponding blank holders are arranged, so that the left and right parts do not influence each other in the material pressing and forming processes, the stability of the die is ensured, and the product forming quality is improved.

Description

Double-acting drawing die structure

Technical Field

The utility model relates to car product processing field specifically is a double acting drawing die structure.

Background

In the existing automobile drawing forming die structure, a die cavity with an upper die body, a lower die body and a blank holder is used as a rule, when the structure is used for forming left and right non-connected pieces in a forming process (namely, the material pieces required by the forming of left and right product are two independent and non-connected material pieces), the two material pieces are arranged on the same blank holder, so that the pressure of a single material piece is difficult to adjust by adjusting the blank holder, great difficulty is brought to debugging work, the material feeding of the product in the drawing forming process is unstable, and the quality of the whole product is influenced.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a processing of controlling of non-disjunctor is satisfied to a new technical scheme, guarantees the quality of product.

The utility model provides a technical scheme as follows:

the double-acting drawing die structure comprises an upper die body, a lower die body and a blank holder, wherein the upper die body comprises an upper die base and two female dies arranged on the upper die base in a mirror symmetry manner, and a concave guide groove is formed beside each female die;

the lower die body comprises a lower die base and two male dies which are arranged on the lower die base and correspondingly matched with the female dies; the lower die base is provided with a convex boss which is convex and correspondingly matched with the guide groove;

the blank holders are arranged on the lower die holder and can move up and down relative to the lower die holder, the two blank holders surround the edge of each male die, and each blank holder is provided with an avoiding notch corresponding to the boss.

Furthermore, the upper die base is provided with two pressure plates which can move up and down relative to the upper die base, and the pressure plates are arranged around the female die.

Furthermore, a plurality of time delay devices are arranged on the blank holder, each time delay device comprises a time delay cylinder and a time delay slide block, and the time delay slide block extends out or retracts under the action of the time delay cylinder; a limiting block is arranged on the material pressing plate; when the delay sliding block is in an extending state, the limiting block is positioned right above the delay sliding block.

Further, the male die comprises a first outer die block, a first inner die block and a first type die block positioned between the first inner die block and the first outer die block, and the first inner die block and the first outer die block are fixedly arranged on the blank holder; the first type module is fixed on the lower die holder; when the blank holder is attached to the lower die holder, the first outer die block, the first inner die block and the first type die block jointly form the male die.

Furthermore, an embedded groove is formed in the first type module, and a floating block capable of sliding up and down is arranged in the embedded groove.

Further, the female die comprises a second outer die block, a second inner die block and a second type die block positioned between the second inner die block and the second outer die block; the second outer module and the second inner module are fixedly arranged on the upper die holder; the second type module is fixedly arranged on the pressure plate; when the pressure plate is attached to the upper die base, the second outer die block, the second inner die block and the second type die block jointly form the female die.

Furthermore, a plurality of guide sliding blocks for improving the guide precision are arranged on the side surface of the boss; and a guide sliding groove corresponding to the guide sliding block is arranged on the side surface of the guide groove.

The beneficial effect that adopts this technical scheme to reach does:

the two corresponding female dies and male dies are arranged in one die cavity according to the left and right parts, and the two corresponding blank holders are arranged, so that the left and right parts do not influence each other in the material pressing and forming processes, the stability of the die is ensured, and the product forming quality is improved.

Drawings

Fig. 1 is an overall perspective view of the double-acting drawing die structure of the present invention.

Fig. 2 is a part display diagram provided in the upper die holder.

Fig. 3 is a part display view provided in the nip plate.

Fig. 4 is a structural diagram of the whole upper die body after the whole upper die base, the material pressing plate and the female die are assembled.

Fig. 5 is an illustration of a part set in the lower die holder.

Fig. 6 is a schematic structural diagram of the flotation device.

FIG. 7 is a view showing a structure of a part provided in the blank holder.

Fig. 8 is a schematic structural diagram of the delay device.

FIG. 9 is a structural diagram of the whole lower die body after the lower die holder, the floating device, the blank holder, the time delay device and the male die are assembled.

Fig. 10 is a schematic diagram of the matching of the delay slider and the limiting block in the extending state.

Wherein: 10 upper die bodies, 11 upper die seats, 12 female dies, 13 guide grooves, 20 lower die bodies, 21 lower die seats, 22 male dies, 23 bosses, 30 blank holders, 31 notches, 40 pressure plates, 41 limiting blocks, 50 time delay devices, 51 time delay cylinders, 52 time delay sliders, 121 second outer modules, 122 second inner modules, 123 second type modules, 221 first outer modules, 222 first inner modules, 223 first type modules and 224 floating blocks.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

The present embodiment provides a double-acting drawing die structure, referring to fig. 1, which comprises an upper die body 10, a lower die body 20 and a blank holder 30 disposed between the upper and lower die bodies, wherein the upper die body 10, the lower die body 20 and the blank holder 30 together form a die cavity for pressing.

Referring to fig. 4 and 9, the upper die body 10 includes an upper die holder 11 and two female dies 12 arranged in mirror symmetry on the upper die holder 11, in this embodiment, the upper die holder 11 is provided with two guide grooves 13, and each guide groove 13 is arranged beside each female die 12; the lower die body 20 comprises a lower die base 21 and two male dies 22 which are arranged on the lower die base 21 and correspondingly matched with the female die 12; and a convex boss 23 which is convex and correspondingly matched with the guide groove 13 is arranged on the lower die base 21.

The guide groove 13 and the boss 23 are matched with each other to play a guiding role so as to ensure the stability of the upper die body 10 and the lower die body 20 in the die assembling process.

In this embodiment, in order to further ensure the guiding precision, a plurality of guiding sliders are arranged on the side surface of the boss 23; and a guide sliding groove corresponding to the guide sliding block is arranged on the side surface of the guide groove 13, and the guide sliding block and the guide sliding groove are matched with each other at high precision to reduce the deformation of the plate material in the die closing process.

The blank holder 30 is arranged on the lower die holder 21 and can move up and down relative to the lower die holder 21; in order to ensure the forming precision of the left and right pieces of sheet metal, referring to fig. 7 and 9, two blank holders 30 are arranged, and each blank holder 30 surrounds the edge of each male die 22; therefore, the left plate and the right plate are drawn and formed at the corresponding positions without mutual interference, the stability of the die is ensured, and the forming quality of the product is improved.

In this embodiment, each blank holder 30 is provided with an avoiding notch 31 corresponding to the boss 23, where the avoiding notch 31 is equal to an avoiding hole, so as to avoid the influence on the matching of the boss 23 and the guide groove 13 in the mold closing process.

Referring to fig. 5-9, the blank holder 30 can move up and down relative to the lower die holder 21, and is implemented by a press ejector rod (not shown), that is, a plurality of top holes are formed in the lower die holder 21, the top holes are distributed around the male die 22, the ejector rod can slide in the top holes in a telescopic manner to be matched with the blank holder 30, the blank holder 30 is in a floating state due to the upward pushing action of the ejector rod, and the blank holder 30 and the lower die holder 21 are attached to each other due to the retraction of the ejector rod.

It should be noted that the operation of the ram is performed by an air cushion provided on the press, but the ram and the air cushion are not the only driving elements for driving the pressing ring 30, and a nitrogen spring may be used instead of the ram and the air cushion of the present embodiment.

Optionally, referring to fig. 2 to 4, a pressing plate 40 capable of moving up and down relative to the upper die holder 11 is disposed on the upper die holder 11, two pressing plates 40 correspond to the two blank holders 30, and each pressing plate 40 surrounds the die 12.

The pressing plate 40 can move up and down by a pressure source arranged in the upper die holder 11, the pressure source is formed by a plurality of nitrogen springs, and the nitrogen springs are used for providing power for the pressing plate 40.

Referring to fig. 5 to 10, in order to avoid damage and deformation of the formed product, in the present embodiment, a plurality of delay devices 50 are disposed on the blank holder 30, each delay device 50 includes a delay cylinder 51 and a delay slider 52, and the delay slider 52 extends or retracts under the action of the delay cylinder 51; a limiting block 41 is arranged on the material pressing plate 40; when the delay sliding block 52 is in the extended state, the limiting block 41 is located right above the delay sliding block 52.

It should be noted that, the extension of the delay slider 52 in the delay device 50 is that the upper die body 10 extends when rising gradually after die assembly, specifically, after the die assembly product is formed, the upper die body 10 rises gradually, the pressure received by the lower die body 20 is reduced, the ejector rod drives the lower die body 20 to reset and rebound, at this time, the situation that the blank holder 40 and the blank holder 30 push and punch the product at the same time will occur, in order to prevent the formed product from being damaged by pressing, the mode of the delay device 50 and the limiting block 41 is provided, that is, at this time, the delay slider 52 in the delay device 50 extends to the right below the limiting block 41, so as to keep the blank holder 30 and the blank holder 40 at a stable fall distance all the time, and avoid the product from deforming.

In the present embodiment, the structure of the male die 22 is further optimized, that is, the male die 22 comprises a first outer die block 221, a first inner die block 222 and a first type die block 223 positioned between the two die blocks, wherein the first outer die block 221 and the first inner die block 222 are fixedly arranged on the blank holder 30; the first type module 223 is fixed on the lower die holder 21; when the blank holder 30 is attached to the lower die holder 21, the first outer die block 221, the first inner die block 222 and the first die block 223 together form the male die 22.

Moreover, a floating device is further arranged on the male die 22, specifically, a caulking groove is arranged in the first type die block 223, a floating block 224 capable of sliding up and down is arranged in the caulking groove, and the floating block 224 and the first type die block 223 are matched and integrated with each other to ensure that the machined molded surfaces are tightly attached.

The up-and-down sliding of the floating blocks 224 is realized by a cylinder, that is, each floating block 224 is fixed with an output shaft of the cylinder, and the telescopic motion of the cylinder causes the floating blocks 224 to slide up and down in the caulking groove.

Referring to fig. 2 to 4, the female mold 12 is further optimized in this embodiment, that is, the female mold 12 includes a second outer mold block 121, a second inner mold block 122, and a second type mold block 123 located between the second inner mold block 122 and the second outer mold block 121; the second outer module 121 and the second inner module 122 are fixedly arranged on the upper die holder 11; the second type module 123 is fixedly arranged on the material pressing plate 40; when the pressure plate 40 is attached to the upper die holder 11, the second outer die block 121, the second inner die block 122 and the second type die block 123 together form the female die 12.

The working principle of the drawing die set forth in this embodiment is further explained below:

referring to fig. 1 to 10, before operation, the delay cylinder 51 retracts to enable the delay slider 52 to be in a retracted state; the air cylinder in the floating device retracts to enable the floating material block 224 to be in a retracted state, and then a jacking rod (not shown) is jacked up to enable the blank holder 30 to be in a floating state; then, the material sheet is fed, and the material sheet is fed to and positioned on the first outer mold 221 and the first inner mold 222 provided on the blank holder 30 by using the guide frame.

The upper die body 10 starts to move downwards, in the moving process, the guide groove 13 in the upper die body 10 is gradually attached to the boss 23 of the lower die body 20, and the guide accuracy of the upper die body 10 and the lower die body 20 is ensured by the matching mode of the guide sliding block and the sliding groove.

The upper mold body 10 is moved further downwards, and then the second outer mold piece 121 and the second inner mold piece 122 in the female mold 12 come into contact with the material sheet and form a pressing effect on the material sheet with the first outer mold piece 221 and the first inner mold piece 222 on the blank holder 30.

The upper die body 10 continues to move downwards, the blank holder 30 compresses the ejector rod (not shown) to gradually elastically retract under the action of pressure, and in the continuous pressing process, the first type module 223 of the male die 22 gradually abuts against the material sheet, so that the material sheet is gradually deformed and is gradually contacted with the second type module 123 of the female die 12 until the die assembly of the female die 12 and the male die 22 is completed, and the material sheet is drawn and molded.

The above operation is referred to as the first half cycle of the draw forming, and then described as the latter half cycle of the draw forming.

After the die 12 and the male die 22 are assembled and kept for a certain time, the delay cylinder 51 on the blank holder 30 is started to extend, so that the delay slide block 52 extends to the position right below the limiting block 41; then the upper die body 10 starts to gradually go upwards to enable the pressure plate 40 to gradually reduce the pressure on the blank holder 30, and the blank holder 30 is then floated upwards and rebounded under the action of the rebounding force of the ejector rod.

Meanwhile, the air cylinder of the floating device is inflated and extended in the rebounding process of the blank holder 30, so that the floating block 224 is extended and matched with the first type module 223 into a whole; and in the gradual upward floating process of the blank holder 30, due to the abutting action of the delay sliding block 52 and the limiting block 41, the blank holder 30 and the material pressing plate 40 are always in a certain fall distance, the precision quality of a formed product is ensured, and the product deformation is avoided.

After the blank holder 30 floats to the right position, the pressure plate 40 is ejected out under the action of the pressure source, and the product falls off, so that one stamping and drawing action is finished.

The foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. A double-acting drawing die structure comprises an upper die body (10), a lower die body (20) and a blank holder (30), and is characterized in that,

the upper die body (10) comprises an upper die base (11) and two female dies (12) which are arranged on the upper die base (11) in a mirror symmetry mode, and an inwards concave guide groove (13) is arranged beside each female die (12);

the lower die body (20) comprises a lower die base (21) and two male dies (22) which are arranged on the lower die base (21) and are correspondingly matched with the female die (12); a convex boss (23) which is convex and correspondingly matched with the guide groove (13) is arranged on the lower die seat (21);

the blank holders (30) are arranged on the lower die holder (21) and can move up and down relative to the lower die holder (21), the blank holders (30) are two, each blank holder (30) surrounds the edge of each male die (22), and each blank holder (30) is provided with an avoiding notch (31) corresponding to the boss (23).

2. The double-acting drawing die structure according to claim 1, wherein the upper die holder (11) is provided with a pressure plate (40) which can move up and down relative to the upper die holder (11), two pressure plates (40) are arranged, and each pressure plate (40) is arranged around the female die (12).

3. The double-acting drawing die structure according to claim 2, wherein a plurality of time delay devices (50) are arranged on the blank holder (30), each time delay device (50) comprises a time delay cylinder (51) and a time delay slide block (52), and the time delay slide blocks (52) extend or retract under the action of the time delay cylinders (51); a limiting block (41) is arranged on the pressure plate (40); when the delay sliding block (52) is in a stretching state, the limiting block (41) is positioned right above the delay sliding block (52).

4. The double-action drawing die structure according to claim 1, characterized in that the male die (22) comprises a first outer die block (221), a first inner die block (222), and a first type die block (223) located between the first inner die block (222) and the first outer die block (221), the first inner die block (222) and the first outer die block (221) being fixedly arranged on the blank holder (30); the first type module (223) is fixed on the lower die holder (21); when the blank holder (30) is attached to the lower die holder (21), the male die (22) is formed by the first outer die block (221), the first inner die block (222) and the first type die block (223) together.

5. Double-action drawing die structure according to claim 4, characterised in that a caulking groove is arranged in the first type module (223), and a floating block (224) capable of sliding up and down is arranged in the caulking groove.

6. The double-action drawing die structure according to claim 2, characterized in that the female die (12) comprises a second outer die block (121), a second inner die block (122) and a second type die block (123) located between the second inner die block (122) and the second outer die block (121); the second outer module (121) and the second inner module (122) are fixedly arranged on the upper die holder (11); the second type module (123) is fixedly arranged on the pressure plate (40); when the pressure plate (40) is attached to the upper die base (11), the second outer die block (121), the second inner die block (122) and the second type die block (123) jointly form the female die (12).

7. The double-action drawing die structure according to claim 1, characterized in that the side of the boss (23) is provided with a plurality of guide sliders for improving the guide accuracy; and a guide sliding groove corresponding to the guide sliding block is arranged on the side surface of the guide groove (13).