CN114178408B - Operation method of progressive deep drawing die - Google Patents
Operation method of progressive deep drawing die Download PDFInfo
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- CN114178408B CN114178408B CN202111390425.4A CN202111390425A CN114178408B CN 114178408 B CN114178408 B CN 114178408B CN 202111390425 A CN202111390425 A CN 202111390425A CN 114178408 B CN114178408 B CN 114178408B
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- male die
- die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
Abstract
The application discloses progressive deep drawing die and operation method thereof, the die comprises a lower die holder, a male die assembly and an electromagnet, a forming cavity is formed in the lower die holder, the forming cavity comprises a plurality of parting cavities arranged from top to bottom, the cross-sectional area of each parting cavity is gradually reduced from top to bottom, the male die assembly comprises a central male die, a middle male die is sleeved on the central male die, an outer male die is sleeved on the middle male die, the central male die and the outer male die can move relative to each other in the vertical direction, the central male die, the middle male die and the outer male die can extend into the corresponding parting cavities, electromagnets are respectively embedded in two side walls of the central male die, two side walls of the middle male die and the inner side wall of the outer male die, and the electromagnets can be powered on and powered off.
Description
Technical Field
The application relates to the technical field of drawing forming, in particular to an operation method of a progressive drawing die.
Background
In the deep drawing forming, a complex external force is applied to the plate by a die to cause a complex stress state to appear in the plate, so that the plate is promoted to flow in an ideal direction. In the deep drawing forming process, a blank holder device is required to be installed to generate friction resistance so as to increase the tensile stress in the plate material, control the flowing of the material and avoid wrinkling. The size of the blank holder force is an important process parameter and a control means in the plate drawing forming. In a traditional plate drawing forming mode, the blank pressing force required by drawing forming is usually generated by an elastic blank holder of a single-action press and a fixed blank holder of a double-action press.
The drawing die is a die for drawing a flat plate blank or a semi-finished blank into an open hollow part, but for a workpiece with an overlarge drawing ratio, one-step drawing forming is difficult due to the limitation of the material and the structure of the die, but the development of a plurality of dies undoubtedly increases the processing cost and reduces the working efficiency.
Disclosure of Invention
The application mainly aims to provide an operation method of a progressive drawing die, and aims to solve the technical problem that an existing drawing die is difficult to draw and form in one step aiming at a workpiece with an overlarge drawing ratio.
In order to achieve the purpose, the application provides a progressive deep drawing die, which comprises a lower die holder, a male die assembly and an electromagnet, wherein a forming cavity is formed in the lower die holder, the forming cavity comprises a plurality of parting cavities which are arranged from top to bottom, the cross-sectional areas of the parting cavities are gradually decreased from top to bottom, the male die assembly comprises a central male die, the central male die is sleeved with a middle male die, the middle male die is sleeved with an outer male die, the central male die, the middle male die and the outer male die can move relative to each other in the vertical direction, the central male die, the middle male die and the outer male die can extend into the corresponding parting cavities, the electromagnets are embedded in two side walls of the central male die, two side walls of the middle male die and the inner side walls of the outer male die, and the electromagnets can be powered on and powered off; the blank holder is arranged on the top of the lower die holder and used for fixing a blank;
an operating method of a progressive drawing die, comprising the steps of:
placing the blank at a corresponding position on the top of the lower die base, and giving the blank holder force to fix the blank;
the male die component integrally moves downwards until the male die component presses the blank into the first-layer parting cavity;
all electromagnets between the middle male die and the outer male die are powered off, the central male die and the middle male die continuously move downwards to press a part of the blank into the second layer parting cavity, and the outer male die is left in the first layer parting cavity;
all electromagnets between the central male die and the middle male die are powered off, the central male die continuously moves downwards to press a part of the blank into the third parting cavity, and the middle male die is left in the second parting cavity to finish drawing and forming the blank into a corresponding workpiece.
Optionally, after the step of drawing the blank into the corresponding workpiece is completed, the method further comprises the following steps:
the central male die moves upwards and returns to the second-layer parting cavity until the central male die and the middle male die are assembled, and all electromagnets between the central male die and the middle male die are electrified;
the central male die and the middle male die integrally move back to the first-layer parting cavity until the middle male die and the outer-layer male die are assembled, and all electromagnets between the middle male die and the outer-layer male die are electrified;
and the male die component integrally moves upwards to exit the first layer of sub-cavity, and the workpiece is taken out.
Optionally, the device further comprises an upper die base, wherein the upper die base is connected to the top of the central male die and is used for driving the central male die to move up and down.
Optionally, the upper die base comprises an upper die plate, the bottom of the upper die plate is detachably connected with a fixing plate, and the central male die is connected to the bottom of the fixing plate.
Optionally, the upper mold plate and the fixing plate are connected by countersunk screws.
Optionally, the central male die is cylindrical or elliptic cylindrical, and the middle male die and the outer male die are both circular sleeves or elliptic sleeves matched with the central male die.
Optionally, the central male die is a polygonal cylinder, and the middle male die and the outer male die are both polygonal sleeves matched with the central male die.
Optionally, the die holder further comprises a base, and the lower die holder is arranged on the top of the base.
The beneficial effect that this application can realize is as follows:
the electromagnet capable of being powered on and powered off is arranged among the male dies, a set of dies with special structures can be formed, the electromagnets among the central male die, the middle male die and the outer male die are respectively powered on or powered off, so that the male die assembly is respectively drawn and formed step by step in each parting cavity, only the central male die is connected with a power source, each male die part is not required to be respectively connected with the power source to carry out independent space, and step-by-step forming through a plurality of dies is not required, so that one-step drawing forming is realized, the die cost is reduced, the die manufacturing cost can be saved by 5-20 ten thousand yuan, the forming period is also shortened, the production efficiency can be improved by more than 10 percent, by adopting the die, a blank is only required to be formed by one-step positioning, and the blank can be ensured not to move in subsequent forming passes, so that the accumulated error caused by repeated positioning in the traditional forming mode is avoided, the size precision of the final formed workpiece is greatly improved, and the practicability is high.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings that are needed in the detailed description of the present application or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural view of a progressive drawing die of the present application;
FIG. 2 is a schematic structural view of a blank during primary drawing in an embodiment of the present application;
FIG. 3 is a schematic structural view of a blank during two-stage drawing in an embodiment of the present application;
FIG. 4 is a schematic structural view of a blank during three-stage drawing in an embodiment of the present application;
FIG. 5 is a schematic structural view of the primary return stroke of the male die assembly in the embodiment of the application;
FIG. 6 is a schematic structural view of a male die assembly in a secondary return stroke in an embodiment of the present application;
fig. 7 is a schematic structural view of the male die assembly at the time of full return stroke in the embodiment of the present application.
Reference numerals:
110-lower die holder, 111-forming die cavity, 120-male die assembly, 121-central male die, 122-middle male die, 123-outer male die, 130-electromagnet, 140-upper die holder, 141-upper die plate, 142-fixing plate, 150-countersunk screw, 160-blank holder, 170-base, 180-blank and 190-workpiece.
The implementation, functional features and advantages of the object of the present application will be further explained with reference to the embodiments, and with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indications (such as up, down, left, right, front, and back … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Example 1
Referring to fig. 1 to 7, the present embodiment provides a progressive deep drawing die, including a lower die holder 110, a male die assembly 120 and an electromagnet 130, a forming cavity 111 is formed in the lower die holder 110, the forming cavity 111 includes a plurality of parting cavities arranged from top to bottom, cross-sectional areas of the parting cavities decrease from top to bottom, the male die assembly 120 includes a central male die 121, a middle male die 122 is sleeved on the central male die 121, an outer male die 123 is sleeved on the middle male die 122, the central male die 121, the middle male die 122 and the outer male die 123 can move relatively in a vertical direction, the central male die 121, the middle male die 122 and the outer male die 123 can extend into the corresponding parting cavities, the electromagnets 130 are respectively embedded in two side walls of the central male die 121, two side walls of the middle male die 122 and inner side walls of the outer male die 123, and the electromagnet 130 can be powered on and off.
In the prior art, for a workpiece with large drawing ratio, drawing needs to be performed for multiple times, and the workpiece is deformed to a certain extent after drawing every time, so that a plurality of drawing forming dies with different cavities are generally equipped for the workpiece with different deformations after drawing every time, but the use cost of the die is increased undoubtedly, and the die is easy to shift when a new die is replaced in a subsequent forming pass, and the process also generates accumulated errors due to repeated positioning, so that the size precision of the finally formed workpiece is low. If adopt hierarchical mould, tear into its stroke of a plurality of terrace dies control respectively promptly, every terrace die needs the independent connection power supply, can increase equipment manufacturing cost undoubtedly and make the degree of difficulty, and the operation is also troublesome complicated, and the practicality is not high.
Therefore, in the embodiment, the electromagnets 130 capable of being powered on and off are arranged between the male dies, so that a set of dies with a special structure can be formed, during specific operation, the male die assembly 120 is integrally moved downwards until the male die assembly 120 presses the blank 180 into the first layer of sub-cavities (i.e. the uppermost layer of sub-cavities), then all the electromagnets 130 between the middle male die 122 and the outer male die 123 are powered off, the central male die 121 and the middle male die 122 are continuously moved downwards to press a part of the blank 180 into the second layer of sub-cavities, the outer layer male die 123 is left in the first layer of sub-cavities, then all the electromagnets 130 between the central male die 121 and the middle male die 122 are powered off, the central male die 121 is continuously moved downwards to press a part of the blank 180 into the third layer of sub-cavities, the middle male die 122 is left in the second layer of sub-cavities, so as to finish the deep drawing of the blank 180 into the corresponding workpiece 190, and the operation is convenient and fast, is simple and effective. In the embodiment, the electromagnets 130 among the central male die 121, the middle male die 122 and the outer male die 123 are respectively powered on or powered off, so that the male die assembly 120 is respectively and gradually drawn and formed in each parting cavity, only the central male die 121 is connected with a power source (such as a hydraulic press), namely only one group of power source is needed, each male die part is not needed to be respectively connected with the power source to carry out independent space, and further, the multi-step forming through a plurality of dies is not needed, so that the one-step drawing forming is realized, the die cost is reduced, the manufacturing cost of the dies can be saved by 5-20 ten thousand yuan, the forming cycle is also shortened, the production efficiency can be improved by more than 10 percent, by adopting the dies of the embodiment, the blank 180 only needs to be positioned and formed once, the play can be ensured not to occur in the subsequent forming pass, the accumulated error caused by repeated positioning in the traditional forming mode is avoided, and the size precision of the finally formed workpiece 190 is greatly improved, the practicability is high.
In addition, the present embodiment skillfully utilizes the functions of getting magnetism when the electromagnet 130 is energized and losing magnetism when the electromagnet is de-energized, and combines the electromagnet with the mold to achieve unexpected effects, so that the present embodiment can be completely adapted to the mold in a multistage drawing manner, and the structural characteristics of the present embodiment can be easily mechanized and automated. Furthermore, the electromagnet 130 is selected to be a permanent magnet in this embodiment because the electromagnet 130 is beneficial for applications requiring a change in magnetic force or requiring remote control, thereby achieving remote and automated use requirements.
It should be noted that, when the drawing ratio of the formed workpiece 190 is small, the intermediate male dies 122 in this embodiment may be omitted, and when the drawing ratio is large, a plurality of sets of intermediate male dies 122 in this embodiment may be provided to adapt to multistage drawing, so the male die assembly 120 in this embodiment may be flexibly assembled, may be applied to dies with various drawing ratios, has versatility, does not need to separately configure the male die assemblies 120 with corresponding specifications, and further reduces the die cost.
In addition, the edge chamfers of the central male die 121, the middle male die 122 and the outer male die 123 are between 5 mm and 10mm, so that the central male die 121, the middle male die 122 and the outer male die 123 can be assembled and combined smoothly when sliding, and the contact surfaces among the central male die 121, the middle male die 122 and the outer male die 123 are designed roughly, so that the friction force among the male dies is increased, and the structural stability during assembly is improved.
As an optional embodiment, the punch holder further comprises an upper die holder 140, the upper die holder 140 is connected to the top of the central punch 121, and the upper die holder 140 is used for driving the central punch 121 to move up and down. The upper die holder 140 is used for connecting a power source so as to apply mechanical power to the central punch 121, wherein the mechanical power can move up and down.
As an alternative embodiment, the upper die base 140 includes an upper die plate 141, a fixing plate 142 is detachably connected to the bottom of the upper die plate 141, the central male die 121 is connected to the bottom of the fixing plate 142, and the upper die plate 141 and the fixing plate 142 are connected by a countersunk screw 150.
In this embodiment, a mounting hole may be formed in the fixing plate 142, the top of the mounting hole is a stepped hole, the central male die 121 may pass through the mounting hole, and a stepped groove matched with the stepped hole is formed in the top of the central male die 121, after the central male die 121 is assembled on the fixing plate 142, the upper die plate 141 is fixed on the fixing plate 142 by using the countersunk head screw 150, so that the central male die 121 can be firmly assembled, and the upper die plate and the upper die base 140 form a whole to move.
As an alternative embodiment, the central punch 121 is cylindrical or elliptic, and the middle punch 122 and the outer punch 123 are both circular sleeves or elliptic sleeves that are matched with the central punch 121.
As another alternative, the central punch 121 is a polygonal cylinder, and the middle punch 122 and the outer punch 123 are polygonal sleeves matched with the central punch 121.
According to the shape of the formed workpiece 190, the shape and structure of the punch assembly 120 should be configured correspondingly, and the workpiece 190 is generally cylindrical, elliptical cylindrical or multi-surface sleeve, so that the central punch 121, the middle punch 122 and the outer punch 123 are configured correspondingly to meet the requirement of the appearance of the formed workpiece.
It should be noted that, when the central male die 121 is cylindrical or elliptic cylindrical, the electromagnet 130 should be an arc-shaped block with a corresponding radian so as to be embedded into the side walls of the central male die 121, the middle male die 122 and the outer male die 123, thereby ensuring that the inner and outer wall surfaces of each male die have no protrusions and can slide with each other.
As an alternative embodiment, a blank holder 160 is further included, the blank holder 160 is disposed on the top of the lower die base 110, and the blank holder 160 is used for fixing the blank 180. The binder 160 is used to apply a binder force to the initial blank 180, so as to fix the blank 180 on the top of the lower die holder 110, thereby preventing the blank 180 from shifting, and the binder 160 can be removed after the blank 180 is pressed into the molding cavity 111.
As an alternative embodiment, the die holder further comprises a base 170, and the lower die holder 110 is arranged on the top of the base 170. The lower die base 110 may be attached to a base 170 by a number of screws, and the base 170 is used to increase the bottom stability of the die.
Example 2
Referring to fig. 1 to 7, the present embodiment provides an operation method of a progressive drawing die, including the steps of:
placing the blank 180 at a corresponding position on the top of the lower die holder 110, and giving the blank holder force of the blank holder 160 to fix the blank 180;
the male die assembly 120 moves downwards integrally until the male die assembly 120 presses the blank 180 into the first-layer parting cavity;
all the electromagnets 130 between the middle male die 122 and the outer male die 123 are powered off, the central male die 121 and the middle male die 122 move downwards continuously to press a part of the blank 180 into the second-layer parting cavity, and the outer male die 123 is left in the first-layer parting cavity;
all the electromagnets 130 between the central male die 121 and the intermediate male die 122 are powered off, the central male die 121 continues to move downwards to press a part of the blank 180 into the third parting cavity, the intermediate male die 122 remains in the second parting cavity, and drawing forming of the blank 180 to form the corresponding workpiece 190 is completed.
In this embodiment, based on the progressive deep drawing die, by respectively powering on or powering off the electromagnets 130 between the central male die 121, the middle male die 122 and the outer male die 123, the male die assembly 120 can be respectively and gradually deep-drawn and formed in each parting cavity, only the central male die 121 is connected with a power source, only one group of power sources is needed, each male die part is not needed to be respectively connected with a power source to carry out independent space, step-by-step forming through a plurality of dies is not needed, and therefore, one-step deep drawing forming is realized, the die cost is reduced, the forming period is also shortened, and the phenomenon of play in subsequent forming passes can be avoided, so that the accumulated error caused by repeated positioning in the traditional forming mode is avoided, the size precision of the finally-formed workpiece 190 is greatly improved, and the practicability is high.
Example 3
Referring to fig. 1 to 7, in the present embodiment, two sets of intermediate male dies 122 in the progressive deep-drawing die are provided, which are respectively an intermediate male die a and an intermediate male die B, the intermediate male die a is sleeved on the central male die 121, the intermediate male die B is sleeved on the intermediate male die a, the outer male die 123 is sleeved on the intermediate male die B, and corresponding electromagnets 130 are also embedded between the male dies, so that the parting chamber should be provided with four layers, and therefore, the present embodiment provides an operation method of the progressive deep-drawing die, which includes the following steps:
placing the blank 180 at a corresponding position on the top of the lower die holder 110, and giving the blank holder force of the blank holder 160 to fix the blank 180;
the male die assembly 120 moves downwards integrally until the male die assembly 120 presses the blank 180 into the first-layer parting cavity;
all the electromagnets 130 between the middle male die B and the outer male die 123 are powered off, the central male die 121, the middle male die A and the middle male die B continuously move downwards to press a part of the blank 180 into the second-layer parting cavity, and the outer male die 123 is left in the first-layer parting cavity;
all the electromagnets 130 between the middle male die A and the middle male die B are powered off, the central male die 121 and the middle male die A continuously move downwards to press a part of the blank 180 into the third parting cavity, and the middle male die B is left in the second parting cavity;
all the electromagnets 130 between the central punch 121 and the middle punch A are powered off, the central punch 121 continues to move downwards to press a part of the blank 180 into the fourth layer parting cavity, and the middle punch A remains in the third layer parting cavity to finish drawing and forming the blank 180 into the corresponding workpiece 190.
Example 4
Referring to fig. 1 to 7, the present embodiment further includes, after completing the step of drawing the blank 180 into the corresponding workpiece 190 in addition to embodiment 2, the steps of:
the central male die 121 moves upwards and retracts into the second-layer parting cavity until the central male die 121 and the middle male die 122 are assembled, and all the electromagnets 130 between the central male die 121 and the middle male die 122 are electrified;
the central male die 121 and the middle male die 122 integrally move upwards and return to the first-layer parting cavity until the middle male die 122 and the outer-layer male die 123 are assembled, and all the electromagnets 130 between the middle male die 122 and the outer-layer male die 123 are electrified;
the punch assembly 120 is moved up to exit the first parting cavity as a whole and the workpiece 190 is removed.
In the embodiment, after the blank 180 is drawn to form the corresponding workpiece 190, the return stroke control method is performed on the center punch 121, the middle punch 122 and the outer punch 123 until the punch assembly 120 is integrally withdrawn, and then the workpiece 190 can be taken out.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (8)
1. A method of operating a progressive drawing die, the progressive drawing die comprising:
the die comprises a lower die base, a die cavity and a die cavity, wherein a forming cavity is formed in the lower die base, the forming cavity comprises a plurality of layers of parting cavities which are arranged from top to bottom, and the cross sectional areas of the parting cavities are gradually reduced from top to bottom;
the male die assembly comprises a central male die, a middle male die is sleeved on the central male die, an outer male die is sleeved on the middle male die, the central male die, the middle male die and the outer male die can move relatively in the vertical direction, and the central male die, the middle male die and the outer male die can extend into corresponding parting cavities;
electromagnets are embedded in the two side walls of the central male die, the two side walls of the middle male die and the inner side wall of the outer male die, and the electromagnets can be powered on and off;
the blank holder is arranged at the top of the lower die holder and used for fixing a blank;
the method comprises the following steps:
placing a blank at a corresponding position on the top of the lower die holder, and giving a blank pressing force of the blank pressing ring to fix the blank;
the male die assembly integrally moves downwards until the male die assembly presses the blank into the first-layer parting cavity;
all electromagnets between the middle male die and the outer male die are powered off, the central male die and the middle male die continuously move downwards to press a part of the blank into a second parting cavity, and the outer male die is left in a first parting cavity;
and all electromagnets between the central male die and the middle male die are powered off, the central male die continuously moves downwards to press a part of the blank into a third parting cavity, and the middle male die is remained in the second parting cavity to finish the deep drawing of the blank into a corresponding workpiece.
2. The method of operation of claim 1 wherein said step of deep drawing said blank into a corresponding workpiece is completed and further comprising the steps of:
the central male die moves upwards and returns to a second-layer parting cavity until the central male die and the middle male die are assembled, and all electromagnets between the central male die and the middle male die are electrified;
the central male die and the middle male die integrally move back to a first layer parting cavity until the middle male die and the outer male die are assembled, and all electromagnets between the middle male die and the outer male die are electrified;
and the male die component integrally moves upwards and exits the first layer of sub-cavity, and the workpiece is taken out.
3. The method of claim 1, further comprising an upper die holder attached to the top of the central punch, the upper die holder configured to move the central punch up and down.
4. The method of claim 3, wherein the upper die base comprises an upper die plate having a retainer plate removably attached to a bottom portion thereof, and the central male die is attached to a bottom portion of the retainer plate.
5. The method of claim 4, wherein the upper plate and the fixing plate are connected by countersunk screws.
6. The method of claim 1, wherein the central punch is cylindrical or elliptical and the intermediate punch and the outer punch are both circular or elliptical sleeves that mate with the central punch.
7. The method of claim 1, wherein the central punch is a multi-faceted cylindrical shape and the intermediate punch and the outer punch are multi-faceted sleeves associated with the central punch.
8. The method of claim 1, further comprising a base, wherein the lower die holder is disposed atop the base.
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| CN202111390425.4A CN114178408B (en) | 2021-11-22 | 2021-11-22 | Operation method of progressive deep drawing die |
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| CN202111390425.4A CN114178408B (en) | 2021-11-22 | 2021-11-22 | Operation method of progressive deep drawing die |
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| US6474126B1 (en) * | 2000-09-14 | 2002-11-05 | Robert H. Webster | Method of deep drawing heavy-gage parts, and related apparatus and article |
| CN104324998B (en) * | 2014-11-05 | 2016-08-17 | 湖南农业大学 | A kind of drawing die with variable blank holding pressure tool with automatic control function |
| EP3328570A1 (en) * | 2015-07-29 | 2018-06-06 | ABB Schweiz AG | Loading dies in a press |
| EP3178580B1 (en) * | 2015-12-11 | 2020-11-11 | Bora S.r.l. | Progressive die that allows to localize and control of the stretching of a sheet steel during forming of a brake plate |
| CN210208319U (en) * | 2019-06-07 | 2020-03-31 | 青岛民海模具机械有限公司 | Metal continuous stamping die |
| CN210936740U (en) * | 2019-10-21 | 2020-07-07 | 黄丹虹 | Novel machine tool die for producing broken steel plate nails |
| CN110743955A (en) * | 2019-10-31 | 2020-02-04 | 马鞍山钢铁股份有限公司 | Deep-tube-shaped metal shell drawing forming method and multi-channel one-step forming die |
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