CN114570820A - Plate forming method based on viscoelastic particle medium - Google Patents
Plate forming method based on viscoelastic particle medium Download PDFInfo
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- CN114570820A CN114570820A CN202210331390.5A CN202210331390A CN114570820A CN 114570820 A CN114570820 A CN 114570820A CN 202210331390 A CN202210331390 A CN 202210331390A CN 114570820 A CN114570820 A CN 114570820A
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- forming
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- viscoelastic
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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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 plate forming method based on a viscoelastic particle medium, which adopts the viscoelastic particle medium to replace the traditional hydraulic pressure, air pressure and particle medium to carry out soft die forming on plate metal. The method comprises the following steps: step S1: proportioning a solid particle medium and a binder; step S2: drawing and forming the plate; the method for preparing the plate forming part can reduce the forming force required to be formed, improve the forming quality of the plate, further improve the forming limit of the plate, reduce the forming pass of forming a complex section, and has the advantages of simple process control, low investment cost, environmental protection, no pollution, easy recovery of forming medium, strong anti-interference capability and easy sealing.
Description
Technical Field
The invention relates to the technical field of metal plate forming, in particular to a plate forming method based on a viscoelastic particle medium.
Background
With the rapid development of industries such as automobiles, aerospace, war industry and the like and the improvement of requirements on energy conservation and consumption reduction, the requirements on some formed parts with high precision and complex shapes are increasingly greater. But has certain problems for the traditional rigid punch-die drawing process and the soft punch (die) forming process. The traditional rigid male and female die deep drawing process has poor quality of a formed part, has great difficulty in deep drawing and forming of a low-plasticity material and a large-deformation part, has high requirement on quality precision of a required matched die in the face of a complex section member, and increases the production cost and the processing difficulty of the die; the half-die forming process using oil or water (emulsion) as a force transmission medium has difficult control on the thickness of a formed part, has very high sealing requirements in the forming process, has a destabilization wrinkling phenomenon on a plate, causes oil splashing to pollute the environment and endanger operators, and needs to be provided with a complex control system; the half-mold forming process using viscous materials as media has high sealing requirement, a control system is complex, and a formed part is difficult to clean after forming; the forming process using solid particle medium as soft male die (female die) has the problems that the quality of formed parts is determined by particle size and material, the uniformity of thickness is difficult to ensure, and the like, and the particle medium is difficult to recover after forming.
The problems that a formed part is difficult to clean and a die needs to be provided with an independent control system after the plate viscous medium is formed are solved; the solid particle medium has the problems of difficult recovery of particles, unstable forming quality and the like after forming; these become problems to be solved in the deep drawing process.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for forming a sheet material based on a viscoelastic granular medium, which can improve the quality of a formed article, and which is energy-saving and environment-friendly, and the formed medium is easy to recycle.
The technical scheme adopted by the invention is as follows:
the invention provides a plate forming method based on a viscoelastic particle medium, which specifically comprises the following steps:
s1: proportioning a solid particle medium and a binder;
(S1.1) selecting a solid particulate medium;
(S1.2) selecting a binder;
(S1.3) mixing and proportioning the selected binder and the solid particles to finally obtain a viscoelastic particle medium required by final forming;
s2: drawing and forming the plate; and (3) according to the shape of the formed piece, carrying out viscoelastic particle medium drawing forming on the plate by adopting a drawing die, and finally obtaining the plate to be formed.
Further, the deep drawing die comprises a shape female die, a male die, a blank holder and a charging basket; the shape concave die is fixed on the working table of the press, and the shape of the side wall of the cavity of the shape concave die is determined according to the shape of a formed piece; a blank holder is arranged at the edge part of the upper end face of the shape concave die; a charging barrel is coaxially arranged above the blank holder and is used for containing viscoelastic particle media; the male die is coaxially arranged at the upper end of the charging barrel and is positioned above the viscoelastic particle medium in the charging barrel.
Further, the step S2 specifically includes:
(S2.1) determining the size of the original blank of the plate according to the shape of the required forming piece;
(S2.2) determining the shape of the shape concave die according to the shape of the required plate forming piece;
(S2.3) during drawing forming, firstly, placing a plate blank above a shape female die, and correspondingly arranging a blank holder above the edge of the blank; and a lubricant is coated on the surface of the shape female die, which is contacted with the blank, of the blank holder, and then a blank holder force P is applied to the blank holder, so that the sheet is prevented from wrinkling in the deformation process; adding a viscoelastic particle medium into a cavity between the charging barrel and the upper end surface of the blank, wherein the addition amount of the viscoelastic particle medium is approximately equal to the volume of a formed piece; and then setting a loading route of a male die according to the parameters of the material, the shape and the wall thickness of the processed formed part, loading the male die according to the set route, descending the male die, applying pressure F to the viscoelastic particle medium to generate forming pressure to enable the plate blank to generate downward plastic deformation until the plate blank is deformed to the shape of the required formed part, finally recovering the viscoelastic particle medium, and unloading the formed plate.
Further, the solid particle medium is a metal ball or a non-metal ball or an irregularly-shaped metal or an irregularly-shaped non-metal and is used for bearing the action of transmission force.
Furthermore, the particle size of the solid particles is 0.1-4 mm.
Furthermore, the binder is a composite binding material formed by mixing silica gel, bentonite and water, or a composite binding material formed by mixing bentonite and wax, or silica gel, bentonite or wax, and is used for binding solid particles.
Compared with the prior art, the invention has the following beneficial effects:
1. the addition of the binder can improve the fluidity of the particle medium, and the purpose of controlling the force transmission characteristic of the viscoelastic particle medium is achieved by adjusting the proportion of the binder and the particles and adjusting the shape or the gradation of the particles, particularly, the addition of the solid particles with irregular shapes can improve the friction characteristic of the forming medium, and is beneficial to improving the forming limit of the plate and the uniformity of the forming wall thickness of the plate under the condition of fitting the beneficial friction with the plate; when the formed piece with high drawing ratio or other complex shapes is processed, the drawing passes can be reduced, and the production efficiency is improved.
2. The energy-saving environment-friendly sealing device is easy to seal and pollution-free, and the viscous particle medium can be recycled.
Drawings
FIG. 1 is a simplified initial schematic illustration of the process of the present invention;
figure 2 is a final schematic diagram of the process of the present invention.
Wherein, the reference numbers: 1-blank holder; 2-a charging basket; 3-a male die; 4-a solid particulate medium; 5-a binder; 6-plate blank; 7-shaped concave die.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
The invention provides a plate forming method based on a viscoelastic particle medium, which is shown in the attached figures 1 and 2 and specifically comprises the following steps:
s1: proportioning a solid particle medium and a binder;
(S1.1) selecting a solid particulate medium 4; the solid particle medium 4 is a metal ball or a non-metal ball or an irregular metal or an irregular non-metal, and is used for bearing the action of transmission force to form a required component; the particle size of the solid particles is 0.1-4 mm. In this embodiment, non-metallic particles having a median diameter of 1mm and composed of silica, calcium carbonate, silicon carbide, and the like are selected as the solid particle portion in the viscoelastic particle medium;
(S1.2) selecting a binder 5; the binder 5 is a composite binding material formed by mixing silica gel, bentonite and water, or a composite binding material formed by mixing bentonite and wax, or silica gel, bentonite or wax and the like, is used for binding solid particles and is used as a binding part in a viscoelastic particle medium;
(S1.3) mixing and proportioning the selected binder and the solid particles, wherein the proportioning is different according to different molding piece materials and geometric dimensions, and the specific proportioning principle is as follows: the solid particle medium is used for transferring the force main body, the binder only has the function of ensuring that the surface of the solid particle medium has certain weak viscosity, and the viscous medium cannot overflow in a liquid state after bearing high pressure, so that the viscoelastic particle medium required by final forming is finally obtained.
S2: drawing and forming the plate; according to the shape of a formed piece, a drawing die is adopted to carry out viscoelastic particle medium drawing forming on the plate, and finally the plate required to be formed is obtained; the method specifically comprises the following steps:
(S2.1) determining the size of the original blank of the plate according to the shape of the required forming piece; in the embodiment, a linear cutting tool is used for cutting and blanking AZ31 magnesium alloy plates with the thickness of 1mm to obtain circular drawing plate blanks 6;
(S2.2) determining the shape of the shape concave die 7 according to the shape of the required plate forming piece; in the embodiment, the drawing die comprises a shape female die 7, a male die 3, a blank holder 1 and a charging basket 2; the shape concave die 7 is fixed on a working table of a press, and the shape of the side wall of a cavity of the shape concave die 7 is determined according to the shape of a formed piece; the edge part of the upper end face of the shape concave die 7 is provided with a blank holder 1; a charging barrel 2 is coaxially arranged above the blank holder 1 and used for containing viscoelastic particle media; the male die 3 is coaxially arranged at the upper end of the charging barrel 2 and is positioned above the viscoelastic particle medium in the charging barrel 2;
(S2.3) during drawing forming, firstly, placing the plate blank 6 above the shape female die 7, and correspondingly arranging the blank holder 1 above the periphery of the edge of the plate blank 6; the lubricant is coated on the contact surfaces of the shape female die 7 and the blank holder 1 and the plate blank 6, and then a downward blank holder force P is applied to the blank holder to prevent the plate blank 6 from wrinkling in the deformation process; viscoelastic particle media are added into a closed space formed by the upper end surfaces of the charging barrel 2 and the plate blank 6, and the addition amount of the viscoelastic particle media is approximately equal to the volume of a formed piece; and then setting a loading route of the male die 3 according to parameters such as the material, the shape and the wall thickness of the processed plate blank 6, loading the male die 3 according to the set route, descending the male die 3, applying pressure F to the viscoelastic particle medium in the charging barrel 2 from top to bottom to generate forming pressure on the viscoelastic particle medium, enabling the plate blank 6 to generate plastic deformation to the side wall of the cavity of the shape female die 7 until the plate blank is deformed to the shape of a required formed part, finally recovering the viscoelastic particle medium, and unloading the formed plate.
According to the method provided by the invention, the pressure provided by the male die 3 is transmitted to the viscoelastic particle medium, and the non-uniform force is transmitted to the plate blank 6 through the viscoelastic particle medium, so that the plate blank 6 is continuously subjected to plastic deformation, and finally the target forming piece is obtained. Compared with the traditional process, the forming limit of the material is improved; the forming medium is easy to recover, and the working efficiency is improved.
The invention is not the best known technology.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (6)
1. A method for forming a sheet material based on a viscoelastic granular medium, the method comprising the steps of:
s1: proportioning a solid particle medium and a binder;
(S1.1) selecting a solid particulate medium;
(S1.2) selecting a binder;
(S1.3) mixing and proportioning the selected binder and the solid particles to finally obtain a viscoelastic particle medium required by final forming;
s2: drawing and forming the plate; and (3) according to the shape of the formed piece, carrying out viscoelastic particle medium drawing forming on the plate by adopting a drawing die, and finally obtaining the plate to be formed.
2. The method of claim 1, wherein the method comprises the steps of: the deep drawing die comprises a shape female die, a male die, a blank holder and a charging basket; the shape concave die is fixed on the working table of the press, and the shape of the side wall of the cavity of the shape concave die is determined according to the shape of a formed piece; a blank holder is arranged at the edge part of the upper end face of the shape concave die; a charging barrel is coaxially arranged above the blank holder and is used for containing viscoelastic particle media; the male die is coaxially arranged at the upper end of the charging barrel and is positioned above the viscoelastic particle medium in the charging barrel.
3. The method of claim 2, wherein the method comprises the steps of: the step S2 specifically includes:
(S2.1) determining the size of the original blank of the plate according to the shape of the required forming piece;
(S2.2) determining the shape of the shape concave die according to the shape of the required plate forming piece;
(S2.3) during deep drawing, firstly, placing a plate blank above a shape female die, and correspondingly arranging a blank holder above the edge part of the blank; and a lubricant is coated on the surface of the shape female die, which is contacted with the blank, of the blank holder, and then a blank holder force P is applied to the blank holder, so that the sheet is prevented from wrinkling in the deformation process; adding a viscoelastic particle medium into a cavity between the charging barrel and the upper end surface of the blank, wherein the addition amount of the viscoelastic particle medium is approximately equal to the volume of a formed piece; and then setting a loading route of a male die according to the parameters of the material, the shape and the wall thickness of the processed formed part, loading the male die according to the set route, descending the male die, applying pressure F to the viscoelastic granular medium to enable the viscoelastic granular medium to generate forming pressure, enabling the plate blank to generate downward plastic deformation until the plate blank is deformed to the shape of the required formed part, finally recovering the viscoelastic granular medium, and unloading the formed plate.
4. The method of claim 1, wherein the method comprises the steps of: the solid particle medium is a metal ball or a non-metal ball or an irregular metal or an irregular nonmetal and is used for bearing the action of transmission force.
5. The method of claim 4, wherein the method comprises the steps of: the particle size of the solid particles is 0.1-4 mm.
6. The method of claim 1, wherein the method comprises the steps of: the binder is a composite binding material formed by mixing silica gel, bentonite and water, or a composite binding material formed by mixing bentonite and wax, or silica gel, bentonite or wax, and is used for binding solid particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210331390.5A CN114570820B (en) | 2022-03-30 | 2022-03-30 | Plate forming method based on viscoelastic particle medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210331390.5A CN114570820B (en) | 2022-03-30 | 2022-03-30 | Plate forming method based on viscoelastic particle medium |
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| CN114570820A true CN114570820A (en) | 2022-06-03 |
| CN114570820B CN114570820B (en) | 2023-03-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1644262A (en) * | 2005-01-24 | 2005-07-27 | 燕山大学 | Half-mould forming process for metal plate material |
| CN101279339A (en) * | 2008-05-16 | 2008-10-08 | 无锡金球机械有限公司 | Mold for leveling aluminum plate for special-shaped curved face quick former |
| CN106363068A (en) * | 2016-11-15 | 2017-02-01 | 沈阳航空航天大学 | Method for improving thermal conductivity of viscous medium based on warm-hot forming of viscous medium |
| CN107522906A (en) * | 2016-06-17 | 2017-12-29 | 住友橡胶工业株式会社 | Highly attenuating rubber composition and viscoplasticity damper |
| CN111299395A (en) * | 2019-11-28 | 2020-06-19 | 哈尔滨理工大学 | Magnetic medium auxiliary plate blanking forming device and method |
-
2022
- 2022-03-30 CN CN202210331390.5A patent/CN114570820B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1644262A (en) * | 2005-01-24 | 2005-07-27 | 燕山大学 | Half-mould forming process for metal plate material |
| CN101279339A (en) * | 2008-05-16 | 2008-10-08 | 无锡金球机械有限公司 | Mold for leveling aluminum plate for special-shaped curved face quick former |
| CN107522906A (en) * | 2016-06-17 | 2017-12-29 | 住友橡胶工业株式会社 | Highly attenuating rubber composition and viscoplasticity damper |
| CN106363068A (en) * | 2016-11-15 | 2017-02-01 | 沈阳航空航天大学 | Method for improving thermal conductivity of viscous medium based on warm-hot forming of viscous medium |
| CN111299395A (en) * | 2019-11-28 | 2020-06-19 | 哈尔滨理工大学 | Magnetic medium auxiliary plate blanking forming device and method |
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| CN114570820B (en) | 2023-03-03 |
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