CN115229039A

CN115229039A - Drawing and punching die

Info

Publication number: CN115229039A
Application number: CN202210873280.1A
Authority: CN
Inventors: 赵梦龙; 石宽; 伍建勇; 张现华
Original assignee: Weilai Automobile Technology Anhui Co Ltd
Current assignee: Weilai Automobile Technology Anhui Co Ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-10-25
Also published as: WO2024017002A1

Abstract

The invention relates to the technical field of dies, and particularly provides a drawing and punching die, aiming at solving the problem that the production precision of parts is deviated due to the difficulty in drawing and punching a plate simultaneously by the conventional die. Therefore, the drawing and punching die comprises a first die holder and a second die holder which are correspondingly arranged, a blank holder is arranged in the second die holder, a male die assembly is arranged in the blank holder, and a female die assembly is connected with the first die holder; the female die assembly is provided with an accommodating cavity, the pressing assembly is movably arranged in the accommodating cavity and comprises a pressing block and a pressing profile arranged on the pressing block, and the male die assembly is provided with a local profile; the punching assembly comprises a punch base and a punch which are connected, a through hole is formed in the material pressing block, the punch is movably arranged in the through hole, and a punching concave sleeve is arranged on the male die assembly. The pressing molded surface and the local molded surface can draw a local area of the plate, and the punching accuracy is ensured through the arrangement of the punch and the through hole.

Description

Drawing and punching die

Technical Field

The invention relates to the technical field of dies, and particularly provides a drawing and punching die.

Background

In the traditional stamping process, the drawing die and the punching die are two sets of dies which are independent from each other, firstly, the profile is formed by the drawing die, and then, the punching is completed on the formed profile by the punching die. The traditional independent die has the disadvantages that after drawing of a stamping part is completed, the stamping part is transferred from the drawing die to a punching die, punching is performed after secondary positioning, part shifting is caused due to unstable positioning, the punching completed under the condition cannot be accurately guaranteed relative to the position degree of a molded surface, particularly for flat parts with large resilience, hole position deviation is caused due to poor positioning precision, deviation values of parts in different batches are inconsistent, the die cannot meet matching requirements after repeated rectification, the manufacturing precision of the whole die is influenced, and a large amount of manpower and material resources are wasted. In summary, the existing die is difficult to draw and punch a local area of a plate material at the same time, so that the deviation of parts is difficult to meet the production standard.

Accordingly, there is a need in the art for a new draw-punch die that addresses the above-mentioned problems.

Disclosure of Invention

The invention aims to solve the technical problems, namely, the problem that the deviation of parts is difficult to meet the production standard due to the fact that the existing die is difficult to draw and punch the plate simultaneously is solved.

The invention provides a drawing and punching die which comprises a first die holder, a second die holder, a female die assembly, a male die assembly, a blank holder, a pressing assembly and a punching assembly, wherein the first die holder and the second die holder are correspondingly arranged, the blank holder is arranged in the second die holder, the male die assembly is arranged in the blank holder, and the female die assembly is connected with the first die holder; the female die assembly is provided with an accommodating cavity penetrating through the female die assembly, the material pressing assembly is movably arranged in the accommodating cavity and comprises a material pressing block and a material pressing molded surface arranged on the material pressing block, and the male die assembly is provided with a local molded surface matched with the material pressing molded surface; the punching assembly comprises a punch base and a punch which are connected, a through hole penetrating through the pressing block is formed in the pressing block, the punch is movably arranged in the through hole, and a punching concave sleeve matched with the punch is arranged on the male die assembly.

In a preferred technical scheme of the drawing and punching die, the accommodating cavity comprises a first cavity, a second cavity and a third cavity which are communicated with each other, the second cavity and the third cavity are respectively located on two sides of the first cavity, the cross section area of the first cavity is larger than that of the second cavity, the cross section area of the third cavity is larger than that of the first cavity, the pressing block comprises a first pressing block and a second pressing block, the pressing profile is arranged on the second pressing block, the first pressing block is arranged to be capable of moving in the first cavity, the second pressing block is arranged to be capable of moving in the second cavity, and the third cavity is arranged to be capable of accommodating the punch base.

In a preferred technical scheme of the drawing and punching die, a plurality of first guide members are arranged on the first cavity, and a plurality of matched second guide members are arranged on the first pressing block.

In a preferred technical scheme of the drawing and punching die, a plurality of first sliding components are arranged on the inner wall of the first cavity, a matched second sliding component is arranged on the first pressing block, and the first cavity and the first pressing block move relatively through the first sliding components and the second sliding components.

In the preferable technical scheme of the drawing and punching die, a plurality of first hard-touching blocks are arranged in the first cavity, and a plurality of matched second hard-touching blocks are arranged on the first pressing block.

In the preferable technical scheme of the drawing and punching die, a nitrogen spring is arranged on one side of the pressing block close to the first die holder, a matched nitrogen spring touch hard block is arranged on the punch base, and under the condition that the first die holder and the second die holder are closed in place, the nitrogen spring is compressed and connected with the nitrogen spring touch hard block in an abutting mode.

In a preferred technical solution of the drawing and punching die, a limit member is arranged on one side of the punch base close to the material pressing block, and the limit member is arranged to abut against the material pressing block when the first die holder and the second die holder are closed in place.

In a preferred technical scheme of the drawing and punching die, the drawing and punching die further comprises a waste recovery component, and the waste recovery component is arranged to recover sheet metal waste generated at the punching concave sleeve.

In an optimal technical scheme of the drawing and punching die, the waste recovery component is a waste sliding plate, a first avoidance hole is formed in the male die assembly, a second avoidance hole is formed in the side wall of the blank holder, a third avoidance hole is formed in the second die holder, and the waste sliding plate sequentially penetrates through the first avoidance hole, the second avoidance hole and the third avoidance hole from the inside of the male die assembly and extends out of the second die holder.

In the preferable technical scheme of the drawing and punching die, a plurality of first connecting holes are formed in the female die assembly, a plurality of matched second connecting holes are formed in the punch base, and a fastener penetrates through the first connecting holes and the second connecting holes and is fixed to connect the punching assembly and the female die assembly.

Under the condition of adopting the technical scheme, the drawing and punching die comprises a first die holder, a second die holder, a female die assembly, a male die assembly, a blank holder, a pressing assembly and a punching assembly, wherein the first die holder and the second die holder are correspondingly arranged, the blank holder is arranged in the second die holder, the male die assembly is arranged in the blank holder, and the female die assembly is connected with the first die holder; the female die assembly is provided with an accommodating cavity penetrating through the female die assembly, the material pressing assembly is movably arranged in the accommodating cavity and comprises a material pressing block and a material pressing molded surface arranged on the material pressing block, and the male die assembly is provided with a local molded surface matched with the material pressing molded surface; the punching assembly comprises a punch base and a punch which are connected, a through hole penetrating through the material pressing block is formed in the material pressing block, the punch is movably arranged in the through hole, and a punching concave sleeve matched with the punch is arranged on the male die assembly. According to the invention, the local area of the sheet material can be drawn through the arrangement of the pressing profile and the local profile, the punch is movably arranged in the through hole, so that the sheet material can be punched after being drawn, and meanwhile, the punching accuracy is ensured.

Furthermore, the first pressing block and the first cavity are arranged in a matched mode, and the second pressing block and the second cavity are arranged in a matched mode, so that the pressing component can be prevented from falling off in the containing cavity.

Further, the first guide member and the second guide member are arranged, so that a guide effect can be provided in the moving process of the swaging assembly, and the swaging assembly can be conveniently restored to the original position when not in operation.

Further, the invention also facilitates the movement of the pressing assembly in the accommodating cavity through the arrangement of the first sliding member and the second sliding member.

Further, the first hard hitting block and the second hard hitting block are arranged, so that the material pressing assembly can be prevented from being damaged due to collision with the accommodating cavity when the material pressing assembly descends.

Further, the material pressing assembly can be automatically reset through the arrangement of the nitrogen spring.

Furthermore, the moving range of the pressing assembly and the punching assembly can be limited by the arrangement of the limiting component.

Furthermore, the waste recovery component can be used for recovering the waste after the plate punching.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is an exploded view of the structure of the drawing-punch die of the present invention;

FIG. 2 is a cross-sectional view at the receiving cavity of the die assembly of the present invention;

FIG. 3 is a block diagram of the male die assembly of the present invention;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 3;

FIG. 5 is a cross-sectional view of a portion of the structure of FIG. 3;

FIG. 6 is an enlarged view of a portion of the structure of FIG. 5;

FIG. 7 is a cross-sectional view of a portion of the structure of the female die assembly, the swaging assembly, and the punching assembly of the present invention after attachment;

FIG. 8 is a sectional view of the first die holder, die assembly, swage assembly and punch assembly of the invention after attachment;

FIG. 9 is a block diagram of a punch assembly of the present invention;

FIG. 10 is an exploded view of the structure shown in FIG. 9;

fig. 11 is a block diagram of a swaging assembly of the invention;

FIG. 12 is an exploded view of the structure shown in FIG. 11;

FIG. 13 is a cross-sectional view at the scrap slide of the draw-punch of the present invention;

FIG. 14 is a block diagram of the drawing-punch die of the present invention in an initial state;

FIG. 15 is an enlarged view of a portion of the structure of FIG. 14;

FIG. 16 is a block diagram of the drawing-punch die of the present invention being subjected to localized area drawing;

FIG. 17 is an enlarged view of a portion of the structure of FIG. 16;

FIG. 18 is a block diagram of the drawing-punch die of the present invention in a closed position;

FIG. 19 is an enlarged view of a portion of the structure of FIG. 18;

reference numerals:

1. a first die holder; 2. a second die holder; 21. a third avoidance hole; 3. a male die assembly; 31. a male die body; 32. a male die surface; 33. a local profile; 34. a first avoidance hole; 35. a waste chute; 36. punching a concave sleeve; 4. a female die assembly; 41. an accommodating chamber; 411. a first cavity; 412. a second cavity; 413. a third cavity; 4131. a first connection hole; 42. a first guide plate; 43. a guide sleeve; 44. a first hard bump block; 5. a blank holder; 51. a second avoidance hole; 6. a material pressing component; 61. a first pressing block; 611. a second hard bump block; 62. a second pressing block; 63. pressing a molded surface; 64. a through hole; 65. a guide post; 66. a second guide plate; 67. a nitrogen spring; 7. a punching assembly; 71. a punch base; 711. limiting column holes; 712. a second connection hole; 72. connecting columns; 73. a punch; 731. punching a cutter; 74. the nitrogen spring bumps the hard block; 75. a limiting post.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "inside", "outside", "close to", etc., are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as either a fixed connection or a removable connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 12, as shown in fig. 1 to 12, the drawing and punching die of the invention includes a first die holder 1, a second die holder 2, a male die assembly 3, a female die assembly 4, a blank holder 5, a blank holder assembly 6 and a punching assembly 7, wherein the first die holder 1 and the second die holder 2 are arranged correspondingly, the blank holder 5 is arranged in the second die holder 2, the male die assembly 3 is arranged in the blank holder 5, and the female die assembly 4 is connected with the first die holder 1; the female die component 4 is provided with an accommodating cavity 41 penetrating through the female die component 4, the material pressing component 6 is movably arranged in the accommodating cavity 41, the material pressing component 6 comprises a material pressing block and a material pressing molded surface 63 arranged on the material pressing block, and the male die component 3 is provided with a local molded surface 33 matched with the material pressing molded surface 63; the punching assembly 7 comprises a punch base 71 and a punch 73 which are connected, a through hole 64 penetrating through the material pressing block is formed in the material pressing block, the punch 73 is movably arranged in the through hole 64, and a punching concave sleeve 36 matched with the punch 73 is arranged on the male die assembly 3.

Specifically, with the direction shown in fig. 1 as a reference direction, the first die holder 1 is located above the second die holder 2, the blank holder 5 is sleeved in the second die holder 2, the punch assembly 3 is sleeved in the blank holder 5, the second die holder 2, the blank holder 5 and the punch assembly 3 jointly form the lower half portion of the drawing and punching die when connected in place, the die assembly 4 is vertically provided with a containing cavity 41 penetrating through the die assembly, the pressing assembly 6 is connected with the inner wall of the containing cavity 41 in an abutting mode, the punching assembly 7 penetrates through the pressing assembly 6 and is movably connected with the pressing assembly 6, the first die holder 1, the die assembly 4, the pressing assembly 6 and the punching assembly 7 jointly form the upper half portion of the drawing and punching die when connected in place, the punch assembly 3 and the die assembly 4 jointly complete the integral pressing of a material part under the condition that the upper half portion and the lower half portion of the drawing and punching die assembly are closed in place, the pressing surface 63 and the partial surface 33 jointly complete the pressing of a sheet material on the drawing area of the sheet material, and the partial punch area of the sheet material after the partial drawing and punching sleeve 36 jointly complete the sheet material.

Preferably, the accommodating cavity 41 includes a first cavity 411, a second cavity 412 and a third cavity 413 which are communicated with each other, the second cavity 412 and the third cavity 413 are respectively located at two sides of the first cavity 411, the area of the cross section of the first cavity 411 is larger than that of the cross section of the second cavity 412, the area of the cross section of the third cavity 413 is larger than that of the cross section of the first cavity 411, the pressing block includes a first pressing block 61 and a second pressing block 62, the pressing profile 63 is arranged on the second pressing block 62, the first pressing block 61 is arranged to be movable in the first cavity 411, the second pressing block 62 is arranged to be movable in the second cavity 412, and the third cavity 413 is arranged to be capable of accommodating the punch base 71.

Specifically, with the direction shown in fig. 2 as a reference direction, the first cavity 411 is tetragonal, the second cavity 412 is cylindrical, the second cavity 412 is located below the first cavity 411, the third cavity 413 is tetragonal, the third cavity 413 is located above the first cavity 411, the area of the horizontal cross section of the third cavity 413, the area of the horizontal cross section of the first cavity 411 and the area of the horizontal cross section of the second cavity 412 are sequentially reduced, the first pressing block 61 and the second pressing block 62 are connected and integrated, the shape of the first pressing block 61 matches the shape of the first cavity 411 and can move up and down in the first cavity 411, the shape of the second pressing block 62 matches the shape of the second cavity 412 and can move up and down in the second cavity 412, and based on the above structural arrangement, the matching of the first cavity 411 and the first pressing block 61 can prevent the dropping of the pressing assembly 6, and at the same time, the pressing assembly 6 can determine its initial position; the third cavity 413 is fixedly connected with the punch base 71, so that the punching assembly 7 can be conveniently fixed on the female die assembly 4.

It should be noted that the present invention does not limit the specific shape and structure of the receiving cavity 41, for example, the receiving cavity 41 only includes the first cavity 411 and the second cavity 412 which are communicated, and the punch base 71 is connected and fixed with the first die holder 1; as long as it can satisfy that the accommodating cavity 41 can accommodate and bear the punching assembly 7 and can realize the movable arrangement of the material pressing assembly 6 in the accommodating cavity 41, a person skilled in the art can set the position according to actual conditions.

Further, in the preferred embodiment, a plurality of first guiding members are disposed on the first cavity 411, and a plurality of matching second guiding members are disposed on the first pressing block 61. Specifically, referring to fig. 2, with the direction shown in fig. 2 as a reference direction, four guide sleeve holes are formed in the bottom wall of the first cavity 411, guide sleeves 43 are disposed in the guide sleeve holes, referring to fig. 11 and 12, with the direction shown in fig. 11 as the reference direction, a second pressing block 62 is disposed at a middle position above the first pressing block 61, four guide posts 65 are further disposed above the first pressing block 61, the four guide posts 65 are circumferentially distributed around the second pressing block 62, and referring to fig. 7 and 8, the guide posts 65 can be inserted into the guide sleeves 43, and the guide posts 65 and the guide sleeves 43 can provide a guiding effect for the movement of the swaging assembly 6 in the accommodating cavity 41.

It should be noted that, the present invention does not limit any specific structure or specific number of the first guide member and the second guide member, one of the first guide member and the second guide member is the guide post 65, and the other of the first guide member and the second guide member is the guide sleeve 43, and those skilled in the art can set the guide sleeve according to actual situations.

In addition, in the preferred embodiment, a plurality of first sliding members are disposed on the inner wall of the first cavity 411, a matching second sliding member is disposed on the first pressing block 61, and the first cavity 411 and the first pressing block 61 are relatively moved by the first sliding member and the second sliding member. Specifically, referring to fig. 2, the first sliding member is a first guide plate 42, two first guide plates 42 are disposed on each of four side walls of the first cavity 411, referring to fig. 11 and 12, the second sliding member is a second guide plate 66, two second guide plates 66 are disposed on each of four side walls of the first pressing block 61, when the pressing assembly 6 and the accommodating cavity 41 are connected in place, the first guide plate 42 and the second guide plate 66 are connected in an abutting manner and can move relatively therebetween, the arrangement of the first guide plate 42 and the second guide plate 66 can reduce a contact area between the side wall of the first pressing block 61 and the side wall of the first cavity 411, so as to further facilitate the up-and-down movement of the pressing assembly 6 in the accommodating cavity 41, and the first guide plate 42 and the second guide plates 66 can play a guiding role in the up-and-down movement process of the pressing assembly 6.

It should be noted that the present invention does not limit any specific structure or specific number of the first sliding member and the second sliding member, for example, one of the first sliding member and the second sliding member is a sliding slot, and the other of the first sliding member and the second sliding member is a sliding block matched with the sliding slot, and those skilled in the art can set the configuration according to actual circumstances.

Further, a plurality of first hard hitting blocks 44 are arranged in the first cavity 411, and a plurality of matched second hard hitting blocks 611 are arranged on the first pressing block 61. Specifically, referring to fig. 2, a plurality of first hard bumps 44 are arranged on the bottom wall of the first cavity 411, and the first hard bumps 44 are arranged on both sides of each guide sleeve 43, referring to fig. 11 and 12, a plurality of second hard bumps 611 are arranged above the first pressing block 61, and the second hard bumps 611 are arranged on both sides of each guide post 65, so that when the pressing assembly 6 and the accommodating cavity 41 are connected in place, the first hard bumps 44 and the second hard bumps 611 are connected in an abutting manner, and based on the above structural arrangement, when the pressing assembly 6 moves up and down in the accommodating cavity 41, the contact surface between the first pressing block 61 and the first cavity 411 can be prevented from being damaged, and meanwhile, the arrangement of the first hard bumps 44 and the second hard bumps 611 can accurately set the initial position of the pressing assembly 6.

Preferably, a nitrogen spring 67 is arranged on one side of the swaging block close to the first die holder 1, a matched nitrogen spring hard-touching block 74 is arranged on the punch base 71, and when the first die holder 1 and the second die holder 2 are closed in place, the nitrogen spring 67 is compressed and the nitrogen spring 67 and the nitrogen spring hard-touching block 74 are connected in an abutting mode. Specifically, referring to fig. 11 and 12, four nitrogen springs 67 are disposed below the first presser block 61, referring to fig. 9 and 10, a nitrogen spring hard-bumping block 74 is disposed above the punch base 71, and when the pressing assembly 6 moves upward in the accommodating chamber 41, the pressing assembly can move to a position where the nitrogen springs 67 abut against the nitrogen spring hard-bumping block 78, and at this time, the nitrogen springs 67 are compressed.

Further, in the preferred embodiment, a side of the punch base 71 close to the swaging block is provided with a limiting member, and the limiting member is arranged to abut against the swaging block when the first die holder 1 and the second die holder 2 are closed in place. Specifically, referring to fig. 9 to 12, a connecting column 72 is arranged in the middle above a punch base 71, a punch 73 is connected above the connecting column 72, a punching blade 731 is arranged above the punch 73, a through hole 64 penetrates through a first pressing block 61 and a second pressing block 62, the shape of the through hole 64 is matched with the shape of the connecting column 72, the punch 73 and the punching blade 731 after connection, the structure of the connecting column 72, the punch 73 and the punching blade 731 after connection can move relative to the through hole 64, four limiting column holes 711 are further arranged above the punch base 71, the limiting members are limiting columns 75, the limiting columns 75 are arranged in the limiting column holes 711, when the pressing assembly 6 moves upwards in the accommodating cavity 41, the punching blade 731 is exposed from the through hole 64, the distance of the punching blade 731 can be limited due to the arrangement of the limiting columns 75, and the precision of plate punching is further improved.

Preferably, the drawing-and-punching die also comprises scrap recovery means arranged to recover the scrap of sheet material produced at the punching pocket 36. Specifically, referring to fig. 3 to 6, the male die assembly 3 includes a male die body 31, a male die surface 32 is disposed on the male die body 31, a female die surface (not shown in the drawings) matched with the male die surface 32 is disposed on the female die assembly 4, the male die surface 32 and the female die surface together complete compression molding of a plate material, a local surface 33 with a downward concave local area is disposed on the male die surface 32, a punching concave sleeve 36 is disposed in the local surface 33, a blade of a punching knife 731 is inserted into the punching concave sleeve 36 to complete punching, the waste recovery member is disposed below the punching concave sleeve 36, and the waste generated by punching is recovered by the waste recovery member.

Referring to fig. 13, specifically, as a preferred arrangement mode, the waste recycling member is a waste slide 35, the male mold assembly 3 is provided with a first avoiding hole 34, the side wall of the blank holder 5 is provided with a second avoiding hole 51, the second mold base 2 is provided with a third avoiding hole 21, and the waste slide 35 sequentially passes through the first avoiding hole 34, the second avoiding hole 51 and the third avoiding hole 21 from the inside of the male mold assembly 3 and extends to the outside of the second mold base 2. Waste material slide 35 slope sets up, and the waste material falls outside the sliding of second die holder 2 behind waste material slide 35, can not cause the jam of waste material.

It should be noted that the present invention does not impose any limitation on the specific structure of the scrap recovery member, for example, in a possible embodiment, the scrap recovery member is a recovery box which is detachably disposed in the punch body 31, and a person skilled in the art can set it according to the actual situation.

Referring next to fig. 7 and 8, the die assembly 4 is provided with a plurality of first coupling holes 4131, the punch base 71 is provided with a plurality of matching second coupling holes 712, and a fastener passes through the first coupling holes 4131 and the second coupling holes 712 and is fixed to couple the punch assembly 7 and the die assembly 4. Specifically, four first connecting holes 4131 are formed in the bottom wall of the third cavity 413, four matching second connecting holes 712 are formed in the punch base 71, and the fastening member fixes the first connecting holes 4131 and the second connecting holes 712 to fix the punching assembly 7 and the die assembly 4.

The working process of the drawing and punching die is as follows:

referring to fig. 14 and 15, the drawing and punching die is in an inoperative state, the nitrogen spring 67 is not compressed, the first hard catch block 44 and the second hard catch block 611 are connected in an abutting manner, the guide post 65 is located in the guide sleeve 43, the pressing profile 63 on the second pressing block 62 is lower than the die profile of the die assembly 4, and the first die holder 1 and the second die holder 2 are in an unclosed state.

Referring next to fig. 16 and 17, the first die holder 1 moves downwards, the pressing profile 63 first contacts the sheet, the nitrogen spring 67 is compressed, the nitrogen spring 67 provides a reaction force, so that the pressing profile 63 and the local profile 33 jointly draw a local area of the sheet, and the male die profile 32 and the female die profile on the female die assembly 4 jointly press the whole sheet to integrally press and form the sheet.

Referring to fig. 18 and 19, the first die holder 1 continues to move downwards, the first hard collision block 44 is separated from the second hard collision block 611, the pressing assembly 6 moves upwards in the accommodating cavity 41, so that the punching knife 731 is exposed out of the pressing profile 63 until the limiting column 75 abuts against the first pressing block 61, at this time, the nitrogen spring 67 is compressed to the shortest distance, the pressing profile 63 and the partial profile 33 press the plate therebetween together, the edge of the punching knife 731 is inserted into the punching concave sleeve 36, punching of the plate after partial area drawing is completed, and the waste after punching is dropped into the waste slide way 35 from the lower part of the punching concave sleeve 36 and is discharged to the outside of the drawing and punching die through the waste slide way 35.

The female die component 4 and the male die component 3 of the drawing and punching die are used for processing and forming the vehicle front cover outer plate in a pressing mode, the pressing molded surface 63 and the local molded surface 33 are used for processing a Logo mounting and positioning hole of the vehicle front cover outer plate, and the local area of the front cover outer plate can be accurately drawn and punched through the pressing component 6 and the punching component 7, so that Logo mounting deviation caused by processing deviation is prevented.

It should be noted that, the present invention does not set any limitation to the application scenario of the drawing-punching die, and the present invention can also be applied to drawing-punching of local areas of other parts, and those skilled in the art can set the drawing-punching die according to actual situations.

The depth of the edge of a punching knife 731 of the drawing and punching die entering the punching concave sleeve 36 is 5mm, the stroke of a material pressing assembly 6 is set to be 10mm, specifically, 10mm before the first die holder 1 and the second die holder 2 are closed in place, the drawing of a local area of a plate is completed, 4mm (minus the thickness of the plate) before the first die holder 1 and the second die holder 2 are closed in place is used for completing the punching of the local area, an independent tool body is set through Autoform software, the forming force required by the drawing of the local area is simulated, the forming force is simulated by taking a front cover outer plate as an example and is 1.8T, four X750 nitrogen springs are used, the 3T initial pressing force can be provided, and the forming requirement can be met through simulation confirmation.

Because the first die holder 1 and the second die holder 2 are not closed in place when punching occurs, a 4mm plate is drawn in place after punching is completed, in the 4mm drawing process, the punching shape cannot avoid the outward expansion phenomenon, and the outer expansion amount of the periphery is determined to be between 0.02mm and 0.08mm, so that when the size of the cutting edge of the punch 731 is selected, the processing of-0.1 mm is carried out on the basis of a target aperture, for example, the target aperture is 10mm, the processing of-0.1 mm is carried out on the basis of the target aperture, the punching aperture is 9.9mm, and the numerical value of the specific aperture of the target aperture is not limited by the invention, and the technical personnel in the field can set the numerical value according to the actual situation.

The punching direction of the drawing procedure needs to be finely adjusted according to the punching angle requirement, the punching angle is 16.8 degrees in the initial punching direction, and in order to ensure the punching precision, the punching angle is changed into 9.8 degrees after the punching direction is integrally rotated for 7 degrees around the Y-axis direction of the vehicle body on the premise of not changing the molded surface of a die and the shape of a sheet material, the original drawing depth and the material utilization rate are not changed, and the formability of a part is kept unchanged after verification.

The front cover outer plate can be allowed to rotate within 20 degrees on the basis of the conventional stamping direction without worrying about the problem of lateral force, and meanwhile, the material pressing surface of the front cover outer plate is more flat, and through simulation verification, the problem of unstable material sheet positioning does not need to be worried about.

In summary, according to the drawing and punching die provided by the invention, the local area of the sheet material can be drawn through the arrangement of the pressing molded surface 63 and the local molded surface 33, and the punch 73 is movably arranged in the through hole 64, so that the sheet material can be punched after being drawn, and the punching accuracy is ensured.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims

1. A drawing and punching die is characterized by comprising a first die holder, a second die holder, a female die assembly, a male die assembly, a blank holder, a pressing assembly and a punching assembly,

the first die holder and the second die holder are correspondingly arranged, the blank holder is arranged in the second die holder, the male die assembly is arranged in the blank holder, and the female die assembly is connected with the first die holder;

the female die assembly is provided with an accommodating cavity penetrating through the female die assembly, the material pressing assembly is movably arranged in the accommodating cavity and comprises a material pressing block and a material pressing molded surface arranged on the material pressing block, and the male die assembly is provided with a local molded surface matched with the material pressing molded surface;

the punching assembly comprises a punch base and a punch which are connected, a through hole penetrating through the material pressing block is formed in the material pressing block, the punch is movably arranged in the through hole, and a punching concave sleeve matched with the punch is arranged on the male die assembly.

2. The draw-and-punch die of claim 1, wherein the receiving cavity comprises a first cavity, a second cavity and a third cavity that are in communication, the second cavity and the third cavity are located on two sides of the first cavity respectively, the cross-sectional area of the first cavity is larger than that of the second cavity, the cross-sectional area of the third cavity is larger than that of the first cavity, the pressing block comprises a first pressing block and a second pressing block, the pressing profile is arranged on the second pressing block, the first pressing block is arranged to be movable in the first cavity, the second pressing block is arranged to be movable in the second cavity, and the third cavity is arranged to receive the punch base.

3. The draw-punch die of claim 2 wherein the first cavity is provided with a plurality of first guide members and the first press block is provided with a plurality of mating second guide members.

4. The draw-punch die of claim 3 wherein the first cavity has a plurality of first slide members disposed on an inner wall thereof and the first press block has a mating second slide member disposed thereon, the first cavity and the first press block being relatively movable by the first and second slide members.

5. The draw-punch die of claim 4 wherein a plurality of first bumper blocks are disposed within the first cavity and a plurality of mating second bumper blocks are disposed on the first press block.

6. The draw-punch die of any one of claims 1 to 5 wherein the swage block is provided with a nitrogen spring on a side thereof adjacent the first die holder, and a matching nitrogen spring stop is provided on the punch base, the nitrogen spring being compressed and in abutting engagement with the nitrogen spring stop when the first and second die holders are closed in position.

7. The draw-punch die of claim 6 wherein a side of the punch base adjacent the pad is provided with a stop member arranged to abut the pad when the die holders are closed in place.

8. Drawing-punch die according to any one of claims 1 to 5, characterised in that it further comprises scrap recovery means arranged to enable recovery of sheet metal scrap generated at the punch pocket.

9. The drawing-punching die as claimed in claim 8, wherein the waste recovery component is a waste sliding plate, a first avoidance hole is formed in the male die assembly, a second avoidance hole is formed in the side wall of the blank holder, a third avoidance hole is formed in the second die holder, and the waste sliding plate penetrates through the first avoidance hole, the second avoidance hole and the third avoidance hole from the inside of the male die assembly in sequence and extends out of the second die holder.

10. The draw-punch die of any one of claims 1 to 5 wherein the die assembly is provided with a plurality of first attachment holes and the punch base is provided with a plurality of mating second attachment holes, fasteners passing through the first and second attachment holes and being secured to attach the punch assembly and the die assembly.