CN114378195B - Metal plate deep drawing forming die and method capable of controlling edge pressing force - Google Patents
Metal plate deep drawing forming die and method capable of controlling edge pressing force Download PDFInfo
- Publication number
- CN114378195B CN114378195B CN202111591089.XA CN202111591089A CN114378195B CN 114378195 B CN114378195 B CN 114378195B CN 202111591089 A CN202111591089 A CN 202111591089A CN 114378195 B CN114378195 B CN 114378195B
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- die
- blank holder
- metal plate
- heating coil
- heating
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
-
- 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
- B21D37/16—Heating or cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a metal plate drawing forming die with controllable blank holder force and a method thereof, belonging to the field of metal plate drawing forming. The invention can adjust the edge pressing force only by adjusting the tightness of the nut, and can feed back the edge pressing force in real time by matching with the pressure sensor arranged between the spring and the top plate, so that the edge pressing force can be adjusted more accurately.
Description
Technical Field
The invention belongs to the field of sheet metal drawing forming, and relates to a sheet metal drawing forming die and method capable of controlling blank holder force.
Background
The metal sheet is widely applied to living aspects, deep drawing formed products are more visible everywhere, and in the metal sheet hot drawing forming process, the problems of the interactive influence of a plurality of factors such as temperature, blank holder force, drawing speed, die geometric dimension and the like exist. The blank holder force is an important technological parameter for influencing the smooth or non-smooth drawing forming, is too small, is easy to wrinkle at a flange in the drawing deformation process, and is easy to be pulled to crack at a fillet of a concave die of a metal plate when the blank holder force is too large, and can be effectively controlled to inhibit the occurrence of deadly defects such as wrinkling, cracking and the like in the hot drawing process to the greatest extent, so that the production efficiency and the product qualification rate of drawn pieces are remarkably improved. Therefore, how to accurately control and measure the edge pressing force is also one of the challenges facing the drawing die design. The drawing forming comprises two actions of drawing and edge pressing, and a traditional drawing die is required to be arranged on a hydraulic press with a sliding block and a top cylinder in a double-acting mode so as to finish drawing experiments of the metal sheet, and the requirements on experimental equipment are high.
Many metal plates have poor plastic deformation capability at room temperature, but the existing drawing dies often do not have a heating system, so that the drawing experiment cannot be performed on the metal with poor plastic deformation capability at room temperature, and the drawing experiment of the metal plates at high temperature cannot be completed.
Therefore, there is a strong need for a metal sheet drawing die capable of controlling the blank holder force and heating to overcome the above problems, so as to achieve accurate control of the blank holder force of the metal sheet with a simple structure and to perform online heating of the metal sheet.
Disclosure of Invention
In view of the above, the present invention aims to provide a drawing forming die and a drawing forming method for a metal plate with controllable blank holder force, which optimize the accurate regulation of the blank holder force application mode and the blank holder force by the drawing die and perform on-line heating on the metal plate.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The metal plate deep drawing forming die comprises a female die support, a female die, a blank holder, a top plate, a male die, a base, a blank holder lining plate and a screw, wherein one end of the female die support is connected with the base, the other end of the female die support is connected with the female die, the blank holder is positioned on one side of the female die away from the female die support, the blank holder lining plate is arranged on one side of the blank holder away from the female die, the top plate is positioned on one side of the blank holder lining plate away from the female die support, and the male die penetrates from the top plate, the blank holder lining plate and one side of the blank holder away from the female die support to be matched and connected with the female die;
the screw penetrates from one side of the female die support, which is far away from the blank holder lining board, passes through the blank holder lining board, and penetrates out from one side of the top plate, which is far away from the blank holder lining board;
The screw is provided with a spring between the blank holder lining plate and the top plate, a nut is arranged at one end of the screw away from the female die support to adjust the relative position between the blank holder lining plate and the top plate, and a pressure sensor is arranged between the spring and the top plate.
The heating system comprises a female die heating groove, a thermocouple and a spring rod, wherein the female die heating groove wraps the female die and is connected with the female die support, a female die heating coil is arranged in the female die heating groove, a blank holder heating coil is arranged in the blank holder, a cavity is arranged in the female die, the thermocouple is positioned at one end, close to the blank holder, in the cavity of the female die, one end of the spring rod is connected with the base, the other end of the spring rod is connected with the thermocouple, and the female die heating coil, the blank holder heating coil and the thermocouple are all connected with a PID controller.
Further, the number of the screws is three, and the screws are uniformly distributed on the top plate.
A metal plate drawing forming method based on the controllable blank holder force of a metal plate drawing forming die comprises the following steps:
a. preparing a metal plate to be formed;
b. placing the metal plate between the female die and the blank holder, rotating the nut to enable the blank holder to press the metal plate on the female die, and adjusting the blank holder force to a preset value in cooperation with real-time feedback of the pressure sensor;
c. the male die is matched with the female die under the action of externally added experimental equipment, and the metal plate is subjected to drawing forming until the drawing is finished;
d. And loosening the nut, taking out the metal plate after deep drawing forming, and analyzing the cracking of the metal plate after deep drawing forming and the microstructure of the key part.
Further, the method further comprises a heating system, the heating system comprises a female die heating groove, a thermocouple and a spring rod, the female die heating groove wraps the female die and is connected with the female die support, a female die heating coil is arranged in the female die heating groove, a blank holder heating coil is arranged in the blank holder, the female die is of a hollow structure, the thermocouple is located at one end, close to the blank holder, in the cavity of the female die, one end of the spring rod is connected with the base, the other end of the spring rod is connected with the thermocouple, the female die heating coil, the blank holder heating coil and the thermocouple are connected with a PID controller, and in the step b, after the PID controller sets heating temperature, the metal sheet is heated on line through the female die heating coil and the blank holder heating coil.
Further, in step b and/or c, the temperature of the metal plate is monitored in real time through a thermocouple and fed back to the PID controller to adjust the heating temperature of the die heating coil and the blank holder heating coil.
The invention has the beneficial effects that:
1. according to the invention, the screw rod fixed on the female die support is matched with the structures of the blank holder lining plate, the top plate, the spring and the nut to provide blank holder force for the metal plate, the pressure of the nut is transmitted to the spring through the top plate, the spring transmits the pressure to the blank holder lining plate, and the blank holder lining plate is connected with the blank holder to provide blank holder force for the metal plate; the invention can realize the adjustment of the edge pressing force only by adjusting the tightness of the nut, and can feed back the edge pressing force in real time by matching with the pressure sensor arranged between the spring and the top plate, so that the edge pressing force can be adjusted more accurately.
2. According to the invention, the heating coils arranged in the blank holder and the concave die heating groove are utilized, so that the metal plate can be rapidly heated on line, and the thermocouple and the spring rod which are designed in the cavity of the concave die are matched, so that the thermocouple can be directly contacted with the bottom of the metal plate all the time in the drawing deformation process, and the real-time feedback of the temperature of the metal plate is obtained.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a drawing die for sheet metal with controllable blank holder force 1;
fig. 2 is a schematic structural view of a drawing die for sheet metal with controllable edge pressing force.
Reference numerals: 1-male die, 2-top plate, 3-nut, 4-pressure sensor, 5-spring, 6-screw rod, 7-blank holder welt, 8-blank holder heating coil, 9-thermocouple, 10-blank holder, 11-die, 12-die heating coil, 13-die, 14-spring rod, 15-die support, 16-base.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-2, the drawing forming die for a metal plate with controllable blank holder force comprises a die support 15, a die 11, a blank holder 10, a top plate 2, a punch 1 and a screw 6, wherein one end of the die support 15 is connected with a base 16, the other end is connected with the die 11, the blank holder 10 is positioned on one side of the die 11 away from the die support 15, a blank holder lining plate 7 is arranged on one side of the blank holder 10 away from the die 11, the top plate 2 is positioned on one side of the blank holder lining plate 7 away from the die support 15, and the punch 1 penetrates into and is connected with the die 11 in a matching manner from the top plate, the blank holder lining plate and one side of the blank holder 10 away from the die support 15;
The screw rod 6 penetrates from one side of the female die support 15 away from the blank holder lining plate 7, penetrates through the blank holder lining plate 7, and penetrates out from one side of the top plate 2 away from the blank holder lining plate 7.
The screw rod 6 is provided with a spring 5 between the blank holder lining plate 7 and the top plate 2, one end of the screw rod 6 far away from the die bracket 15 is provided with a nut 3 to adjust the relative position between the blank holder lining plate 7 and the top plate 2, and a pressure sensor 4 is arranged between the spring 5 and the top plate 2.
Specifically, the invention utilizes the screw rod 6 fixed on the die bracket 15 to cooperate with the blank holder lining plate 7, the top plate 2, the spring 5 and the blank holder structure of the nut 3 to provide blank holder force for the metal sheet, the pressure generated by the nut 3 is transmitted to the spring 5 through the top plate 2, the spring 5 transmits the pressure to the blank holder lining plate 7, the blank holder lining plate 7 is connected with the blank holder 10 to provide blank holder force for the metal sheet, the invention can realize the adjustment of the blank holder force by adjusting the tightness of the nut 3, does not need to additionally provide a power source as the blank holder force, has simple and reliable structure, saves cost, can monitor the pressure in real time by arranging the pressure sensor 4 between the spring 5 and the top plate 2, can precisely control the blank holder force, and one end of the male die 1 far away from the female die 11 is connected with the press head of a press as the power source for drawing the male die 1.
The invention further comprises a heating system, the heating system comprises a female die heating groove 13, a thermocouple 9 and a spring rod 14, the female die heating groove 13 wraps the female die 11 and connects the female die 11 with the female die support 15, a female die heating coil 12 is arranged in the female die heating groove 13, a blank holder heating coil 8 is arranged in the blank holder 10, a cavity is arranged in the female die 11, the thermocouple 9 is positioned at one end, close to the blank holder 10, in the cavity of the female die 11, one end of the spring rod 14 is connected with the base 16, the other end is connected with the thermocouple 9, and the female die heating coil 12, the blank holder heating coil 8 and the thermocouple 9 are all connected with a PID controller. In order to realize the heating function, the conventional deep drawing die is generally carried out on a universal testing machine with a thermal environment box, the time is long, the efficiency is low, the real-time temperature of the metal plate is difficult to obtain, and the temperature of the plate is generally estimated approximately only by controlling the temperature of the die. According to the heating system, the heating coil is arranged in the die and can be used for heating the metal plate on line, the heating coil is closer to the metal plate, the heating efficiency is higher, the female die is of a hollow structure and is matched with the thermocouple 9 arranged in the cavity of the female die 11, the thermocouple 9 is connected to the base 16 through the spring rod 14, the thermocouple 9 can be ensured to be always in contact with the metal plate in the drawing forming process under the action of the spring rod 14, the temperature of the metal plate can be fed back in real time, the accurate control of the temperature of the metal plate can be realized, and the requirement of the metal plate such as magnesium alloy on the deformation temperature can be met.
Further, the number of the screws 3 is three, the screws 3 are uniformly distributed on the top plate 2, and the screws 3 are arranged to be three so as to ensure that the nuts 3 can provide stable pressure and stability of blank holder force.
A metal plate drawing forming method based on the controllable blank holder force of a metal plate drawing forming die comprises the following steps:
a. preparing a metal plate to be formed;
b. placing a metal plate between a female die 11 and a blank holder 10, rotating a nut 3, transmitting pressure generated by the nut 3 to a spring 5 through a top plate 2, transmitting the pressure to a blank holder lining plate 7 by the spring 5, connecting the blank holder lining plate 7 with the blank holder 10, providing blank holder force for the metal plate, enabling the blank holder 10 to press the metal plate on the female die 11, adjusting the blank holder force to a preset value in cooperation with real-time feedback of a pressure sensor 4, and heating the metal plate to a preset temperature;
c. The male die 1 is pressed under the action of external experimental equipment, a preset pressing speed and a preset pressing distance are set, and the male die 1 is matched with the female die 11 to carry out drawing forming on a metal plate until the drawing is finished;
d. and loosening the nut 3, loosening the metal plate by the blank holder 10, upwards displacing the blank holder 10, taking out the metal plate subjected to deep drawing, putting the metal plate subjected to deep drawing into the metal plate subjected to deep drawing, carrying out the next round of deep drawing, and analyzing the cracking of the metal plate subjected to deep drawing and the microstructure of the key part.
Further, the method further comprises a heating system, the heating system comprises a female die heating groove 13, a thermocouple 9 and a spring rod 14, the female die heating groove 13 wraps the female die 11, the female die 11 is connected with the female die support 15, a female die heating coil 12 is arranged in the female die heating groove 13, a blank holder heating coil 8 is arranged in the blank holder 10, the female die 11 is of a hollow structure, the thermocouple 9 is positioned at one end, close to the blank holder 10, in the cavity of the female die 11, of the thermocouple 9, one end of the spring rod 14 is connected with the base 16, the other end of the spring rod is connected with the thermocouple 9, the female die heating coil 12, the blank holder heating coil 8 and the thermocouple 9 are all connected with a PID controller, after the PID controller sets the heating temperature, the metal sheet is heated on line through the female die heating coil 12 and the blank holder heating coil 8, and in steps b and/or c, the temperature of the metal sheet is monitored in real time through the thermocouple 9, and fed back to the PID controller so as to adjust the heating temperature of the female die heating coil 12 and the blank holder heating coil 8.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (5)
1. A sheet metal deep drawing forming die with controllable blank holder force is characterized in that: the die comprises a die support (15), a die (11), a blank holder (10), a top plate (2), a male die (1), a base (16), a blank holder lining plate (7) and a screw (6), wherein one end of the die support (15) is connected with the base (16), the other end of the die support is connected with the die (11), the blank holder (10) is positioned on one side, far away from the die support (15), of the die (11), the blank holder (10) is provided with the blank holder lining plate (7), the top plate (2) is positioned on one side, far away from the die support (15), of the blank holder lining plate (7), and the male die (1) penetrates into and is connected with the die (11) in a matched manner from one side, far away from the die support (15), of the blank holder (10);
The screw (6) penetrates from one side of the female die support (15) far away from the blank holder lining plate (7), penetrates through the blank holder lining plate (7), penetrates out from one side of the top plate (2) far away from the blank holder lining plate (7), and is provided with a spring (5) arranged between the blank holder lining plate (7) and the top plate (2); one end of the screw rod (6) far away from the female die bracket (15) is provided with a nut (3) for adjusting the relative position between the blank holder lining plate (7) and the top plate (2), and a pressure sensor (4) is arranged between the spring (5) and the top plate (2)
Still include heating system, heating system includes die heating groove (13), thermocouple (9) and spring beam (14), die heating groove (13) will die (11) parcel is including, and will die (11) with die support (15) link to each other be equipped with die heating coil (12) in die heating groove (13), be equipped with blank holder heating coil (8) in blank holder (10), be equipped with the cavity in die (11), thermocouple (9) are located be close to in the cavity of die (11) one side of blank holder (10), spring beam (14) one end with base (16) link to each other, the other end with thermocouple (9) link to each other, die heating coil (12), blank holder heating coil (8) and thermocouple (9) all link to each other with the PID controller.
2. The controlled edge pressure sheet metal drawing die as set forth in claim 1, wherein: the number of the screws is three, and the screws are uniformly distributed on the top plate (2).
3. A method for drawing and forming a metal plate with controllable blank holder force based on the metal plate drawing and forming die with controllable blank holder force as claimed in any one of claims 1-2, comprising the steps of:
a. preparing a metal plate to be formed;
b. placing a metal plate between a female die (11) and a blank holder (10), rotating a nut (3) to enable the blank holder (10) to press the metal plate on the female die (11), and adjusting the blank holder force to a preset value by matching with real-time feedback of a pressure sensor (4);
c. The male die (1) is matched with the female die (11) under the action of externally added experimental equipment, and the metal plate is subjected to deep drawing forming until the deep drawing is finished;
d. And loosening the nut (3), taking out the drawn metal plate, and analyzing the cracking of the drawn metal plate and the microstructure of the key part.
4. A method of controlled edge pressure sheet metal deep drawing as defined in claim 3, wherein: still include heating system, heating system includes die heating groove (13), thermocouple (9) and spring beam (14), die heating groove (13) will die (11) parcel is including, and will die (11) with die support (15) link to each other be equipped with die heating coil (12) in die heating groove (13), be equipped with blank holder heating coil (8) in blank holder (10), die (11) are hollow structure, thermocouple (9) are located be close to in the cavity of die (11) the one end of blank holder (10), spring beam (14) one end with base (16) link to each other, the other end with thermocouple (9) link to each other, die heating coil (12), blank holder heating coil (8) and thermocouple (9) all link to each other with the PID controller, in step b, after the PID controller sets for the heating temperature, heat sheet metal through die heating coil (12), blank holder heating coil (8).
5. The method for drawing and forming a metal plate with controllable blank holder force according to claim 4, wherein the method comprises the following steps: in the step b and/or c, the temperature of the metal plate is monitored in real time through a thermocouple (9), and is fed back to a PID controller to adjust the heating temperature of the die heating coil (12) and the blank holder heating coil (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591089.XA CN114378195B (en) | 2021-12-23 | 2021-12-23 | Metal plate deep drawing forming die and method capable of controlling edge pressing force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591089.XA CN114378195B (en) | 2021-12-23 | 2021-12-23 | Metal plate deep drawing forming die and method capable of controlling edge pressing force |
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| CN114378195A CN114378195A (en) | 2022-04-22 |
| CN114378195B true CN114378195B (en) | 2024-06-25 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786123A (en) * | 2010-02-05 | 2010-07-28 | 江苏大学 | Temperature-differential forming terrace die of metal sheet material |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL181914C (en) * | 1977-07-05 | 1900-01-01 | Toyo Seikan Kaisha Ltd | DEVICE FOR MANUFACTURE OF DRAWN OBJECTS. |
| CN101912928A (en) * | 2010-09-15 | 2010-12-15 | 上海应用技术学院 | Sheet metal warm drawing die |
| CN107649586B (en) * | 2017-09-22 | 2019-02-15 | 贵州航天新力铸锻有限责任公司 | It is a kind of for circular cone involucrum shaping dies and its manufacturing process of circular cone involucrum |
| CN211135119U (en) * | 2019-11-08 | 2020-07-31 | 中南大学 | An ultra-low temperature forming device for aluminum-lithium alloy complex curved thin-walled components |
| CN111774472B (en) * | 2020-07-31 | 2022-02-11 | 重庆交通大学 | Floating Support Single Point Incremental Thermoforming Device |
| CN214814162U (en) * | 2021-04-19 | 2021-11-23 | 太原科技大学 | Multi-size deep drawing die capable of adjusting blank pressing force |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786123A (en) * | 2010-02-05 | 2010-07-28 | 江苏大学 | Temperature-differential forming terrace die of metal sheet material |
Non-Patent Citations (1)
| Title |
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| 镁合金板热拉深模具设计及应用;闫凯民;方刚;;轻合金加工技术;20170520(第05期);全文 * |
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