CN112935039B - Method for forming viscous medium of special-shaped channel part - Google Patents
Method for forming viscous medium of special-shaped channel part Download PDFInfo
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- CN112935039B CN112935039B CN202110185174.XA CN202110185174A CN112935039B CN 112935039 B CN112935039 B CN 112935039B CN 202110185174 A CN202110185174 A CN 202110185174A CN 112935039 B CN112935039 B CN 112935039B
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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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/20—Bending sheet metal, not otherwise provided for
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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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/22—Auxiliary equipment, e.g. positioning devices
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a method for forming viscous media of a special-shaped channel part, which comprises the following steps that I, a blank holder and a female die are used for clamping a plate blank; placing a linear injection mold on the plate blank, wherein the linear injection mold is positioned right above the first-stage linear channel section of the cavity; III, filling viscous media into the linear injection mold; loading a viscous medium by the linear plunger, and enabling the plate blank to be attached to the cavity by the viscous medium so as to form a first-stage channel straight-line segment; taking down the linear injection mold and enabling the circular arc injection mold to be positioned right above the first-stage circular arc channel section of the cavity; VI, filling viscous media into the circular arc injection mold; the circular arc plunger loads a viscous medium, and the viscous medium enables the plate blank to be attached to the cavity so as to form a first-stage channel circular arc section; and VIII, taking down the arc-shaped plunger piston, and repeating the forming step to finish the special-shaped channel part.
Description
Technical Field
The invention relates to the technical field of plate forming, in particular to a method for forming viscous media of a special-shaped channel piece.
Background
The special-shaped channel structure is widely applied to structural designs of key parts of a new generation of aircraft engine, fuel cell bipolar plates and the like. The special-shaped channel parts are complex in structure and thin in wall, high-strength steel, high-temperature alloy, titanium alloy and other difficult-to-machine materials are mostly adopted, and efficient and high-precision machining of the parts is difficult or even impossible to achieve by most machining methods. It is therefore desirable to develop innovative precision forming processes.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem that the special-shaped channel piece cannot be precisely formed.
(II) technical scheme
In order to solve the technical problem, the invention provides a method for forming viscous medium of a special-shaped channel part, which comprises the following steps,
placing a plate blank on a female die, placing a blank holder on the plate blank, and applying pressure to the blank holder to enable the blank holder and the female die to clamp the plate blank;
placing the linear injection mold on the plate blank and pressing one side of the blank holder to ensure that the linear injection mold is positioned right above the first-stage linear channel section of the cavity;
filling a viscous medium into the linear injection mold, and mounting a linear plunger on the viscous medium;
applying pressure to the linear plunger to load a viscous medium, wherein the viscous medium enables the plate blank to be attached to the cavity so as to form a first-stage channel straight-line segment;
taking down the linear injection mold, placing the circular arc injection mold on the plate blank, and enabling the circular arc injection mold to be positioned right above the first-stage circular arc channel section of the cavity;
filling a viscous medium into the circular arc injection mold, and mounting a circular arc plunger on the viscous medium;
applying pressure to the arc-shaped plunger piston to load viscous medium, wherein the viscous medium enables the plate blank to be attached to the cavity so as to form a first-stage channel arc section;
and VIII, taking down the arc-shaped plunger piston, continuously installing a linear injection mold, repeating the forming steps, and finishing the special-shaped channel piece after the last stage of linear channel section is formed.
By adopting the technical scheme, the opposite-sex passage piece is divided into a plurality of stages according to the structural characteristics to be respectively formed, and when each stage of passage is formed, the plate blank of the unformed region can flow and supplement to the deformation region, so that the wall thickness is prevented from being thinned, meanwhile, the step forming is beneficial to precise forming, and the forming size of each region can meet the requirement.
As a further description of the present invention, it is preferable that the cross-section of the injection cavity in the linear injection mold and the circular injection mold is rectangular and a combination of a terrace, wherein the lower end width of the terrace is smaller than the upper end width of the terrace, the rectangular width is the same as the upper end width of the terrace and is located at the upper part of the terrace, and the lower end width of the terrace is the same as the width of the cavity.
Through adopting above-mentioned technical scheme, set up the notch of falling the terrace shape and help viscous medium to collect the die cavity in, set up the rectangular big groove and can deposit more viscous medium to enable under the direction of terrace and make viscous medium can all fill in the die cavity, and then ensure that slab and die cavity are laminated completely.
As a further illustration of the invention, it is preferred that the cross-sectional dimensions of the cavity be in the range of 0.2mm by 0.2mm to 2mm by 2 mm.
By adopting the technical scheme, the female die can form the special-shaped channel piece with small size and specification, and the special-shaped channel piece with small specification can be precisely formed.
As a further illustration of the invention, the slab thickness is preferably between 0.1mm and 0.5 mm.
By adopting the technical scheme, the problems of cracking and uneven thickness can not occur on the premise that the thin-wall plate blank is formed by utilizing the viscous medium, and the high-yield thin-plate forming method has high yield in the field of thin-plate forming.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
the special-shaped channel is formed by adopting the viscous medium, the channel of the special-shaped channel is divided into a straight line segment and an arc segment, and the special-shaped channel is formed by grading two corresponding injection molds. Compared with the method for forming all channels in one step by the existing method, the method provided by the invention can effectively supplement materials by forming the special-shaped channels step by step, and when each stage of channel is formed, the plate blank in the unformed area can flow and supplement to the deformation area, so that the wall thickness is prevented from being reduced. The forming method has simple die structure and flexible and easily realized process.
Drawings
FIG. 1 is a view showing the structure of a female mold of the present invention;
FIG. 2 is a view of the initial installation position of the linear injection mold of the present invention;
FIG. 3 is a view of the initial installation position of the injection mold of the present invention in the shape of a circular arc;
FIG. 4 is a partial cross-sectional view of the invention prior to forming;
FIG. 5 is a partial cross-sectional view of the forming guard of the present invention;
fig. 6 is a structural view of the final forming of the shaped channel piece of the present invention.
In the figure: 1. a female die; 11. a cavity; 2. a blank holder; 3. a sheet blank; 4. injecting the mixture into a mold in a straight line shape; 41. a linear plunger; 42. a push rod; 5. injecting the circular arc into a mold; 51. a circular arc-shaped plunger; 52. pushing the column; 6. a viscous medium.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
A method for forming viscous medium of a profiled channel member, as shown in fig. 1, comprising the steps of:
i, placing a plate blank 3 on a female die 1, placing a blank holder 2 on the plate blank 3, and applying pressure to the blank holder 2 to enable the blank holder 2 and the female die 1 to clamp the plate blank 3;
II, placing the linear injection mold 4 on the plate blank 3 and pressing close to one side of the blank holder 2, so that the linear injection mold 4 is positioned right above the first-stage linear channel section of the cavity 11;
III, filling the linear injection mold 4 with viscous media 6, mounting a linear plunger 41 on the viscous media 6, and clamping a push rod 42 by a power loading device;
IV, starting the power loading device and applying pressure to the linear plunger 41 through the push rod 42 to enable the linear plunger 41 to load the viscous medium 6, and enabling the plate blank 3 to be attached to the cavity 11 through the viscous medium 6 to form a first-stage channel straight-line segment;
taking down the linear injection mold 4, cleaning the viscous medium 6, placing the circular arc injection mold 5 on the plate blank 3, and enabling the circular arc injection mold 5 to be positioned right above the first-stage circular arc channel section of the cavity 1;
VI, filling the circular arc injection mold 5 with viscous medium 6, mounting a circular arc plunger 52 on the viscous medium 6, and clamping the push column 52 by a power loading device;
the power loading device is started, and pressure is applied to the circular arc plunger 51 through the push column 52, so that the circular arc plunger 51 loads the viscous medium 6, and the viscous medium 6 enables the plate blank 3 to be attached to the cavity 11, so that a first-stage channel circular arc section is formed;
and VIII, taking down the arc-shaped plunger 51, cleaning the viscous medium 6, continuously installing the linear injection mold 4, repeating the forming steps, and finishing the special-shaped channel part after the last stage of linear channel section is formed.
By adopting the forming method, the opposite-shaped channel piece is divided into a plurality of stages according to the structural characteristics to be formed respectively, and when each stage of channel is formed, the plate blank 3 of the unformed area can flow and supplement to the deformation area, so that the wall thickness is prevented from being thinned, and meanwhile, the step forming is beneficial to precise forming, and the forming size of each area can meet the requirement.
With reference to fig. 4 and 5, the sectional dimension of the cavity 11 is determined by actual requirements, generally ranges from 0.2mm × 0.2mm to 2mm × 2mm, so that the female die 1 can form a special-shaped channel part with a small dimension and specification, and the special-shaped channel part with a small specification can be precisely formed. The thickness of the outer plate blank 3 is 0.1 mm-0.5 mm, the problems of cracking and uneven thickness can not occur on the premise that the thin-wall plate blank 3 can be formed by utilizing the viscous medium 5, and the outer plate blank has very high qualification rate in the field of thin plate forming. Compare current thermoforming and carry out small-size to the slab material 3 of above-mentioned size and take shape, if heating temperature can not satisfy higher control accuracy, either make the material excessively warp, or its rebound rate of panel cooling after shaping is extremely high, and size after kick-backing and required size difference are very big. The punching forming mode can easily lead the thin plate to be cracked or the thin plate to be uneven in thickness, the invention can not only avoid the problems, but also lead the rebound quantity of the integrally formed plate blank 3 to be not more than 0.002mm and the thickness to be even, and lead the qualification rate to reach 98 percent after 50 times of forming tests.
With reference to fig. 4 and 5, the cross-section of the injection cavity in the linear injection mold 4 and the circular arc injection mold 5 is rectangular and combined with the terrace, wherein the width of the lower end of the terrace is smaller than the width of the upper end of the terrace, the rectangular width is the same as the width of the upper end of the terrace and is positioned on the upper part of the terrace, the width of the lower end of the terrace is the same as the width of the cavity 11, the inverted terrace-shaped notch is arranged to help the viscous medium 6 to gather in the cavity 11, the rectangular big groove is arranged to store more viscous medium 6, and the viscous medium 6 can be completely filled in the cavity 11 under the guidance of the terrace, thereby ensuring that the slab blank 3 is completely attached to the cavity 11.
In summary, the viscous medium 6 is adopted to form the special-shaped channel part, the channel of the special-shaped channel part is divided into a straight line section and an arc section, and two corresponding injection dies are utilized to form the special-shaped channel step by step. Compared with the method for forming all channels in one step by the existing method, the method provided by the invention can effectively supplement materials by forming the special-shaped channels step by step, and when each stage of channel is formed, the plate blank in the unformed area can flow and supplement to the deformation area, so that the wall thickness is prevented from being reduced. The forming method has simple die structure and flexible and easily realized process.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for forming viscous media for a special-shaped channel part is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
i, placing a plate blank (3) on a female die (1), placing a blank holder (2) on the plate blank (3), and applying pressure to the blank holder (2) to enable the blank holder (2) and the female die (1) to clamp the plate blank (3);
II, placing the linear injection mold (4) on the plate blank (3) and pressing close to one side of the blank holder (2) to enable the linear injection mold (4) to be positioned right above the first-stage linear channel section of the cavity (11);
III, filling a linear injection mold (4) with viscous medium (6), and mounting a linear plunger (41) on the viscous medium (6);
applying pressure to the linear plunger (41) to enable the linear plunger (41) to load the viscous medium (6), and enabling the plate blank (3) to fit the cavity (11) through the viscous medium (6) to form a first-stage channel straight-line segment;
taking down the linear injection mold (4), placing the circular arc injection mold (5) on the plate blank (3), and enabling the circular arc injection mold (5) to be positioned right above the first-stage circular arc channel section of the cavity (11);
VI, filling the circular arc injection mold (5) with a viscous medium (6), and mounting a circular arc plunger (51) on the viscous medium (6);
applying pressure to the circular arc plunger (51) to enable the circular arc plunger (51) to load the viscous medium (6), and enabling the plate blank (3) to be attached to the cavity (11) through the viscous medium (6) to form a first-stage channel circular arc section;
and VIII, taking down the arc-shaped plunger (5), continuously installing a linear injection mold (4), repeating the forming steps, and finishing the special-shaped channel piece after the linear section of the last stage of channel is formed.
2. A method for forming a profiled channel member with viscous medium as claimed in claim 1, wherein: the sections of injection cavities in the linear injection mold (4) and the circular arc injection mold (5) are both rectangular and combined with a step, wherein the width of the lower end of the step is smaller than the width of the upper end of the step, the rectangular width is the same as the width of the upper end of the step and is positioned on the upper part of the step, and the width of the lower end of the step is the same as the width of the cavity (11).
3. A method for forming a profiled channel member with viscous medium as claimed in claim 1, wherein: the cross section of the cavity (11) is 0.2mm multiplied by 0.2mm to 2mm multiplied by 2 mm.
4. A method for forming a profiled channel member with viscous medium according to claim 3, characterized in that: the thickness of the plate blank (3) is between 0.1mm and 0.5 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110185174.XA CN112935039B (en) | 2021-02-10 | 2021-02-10 | Method for forming viscous medium of special-shaped channel part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110185174.XA CN112935039B (en) | 2021-02-10 | 2021-02-10 | Method for forming viscous medium of special-shaped channel part |
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| CN112935039A CN112935039A (en) | 2021-06-11 |
| CN112935039B true CN112935039B (en) | 2021-08-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2341857B1 (en) * | 1973-08-18 | 1975-02-06 | Mueller Hermann Gmbh | Tool arrangement for making pipe arches |
| DE202012002012U1 (en) * | 2012-02-27 | 2013-05-28 | Christoph Lenz | Cold-formed punch for producing a media-tight stamped seam |
| CN203944747U (en) * | 2014-05-21 | 2014-11-19 | 天津市英辰精密模具有限公司 | A kind of diel |
| CN105215127A (en) * | 2015-10-12 | 2016-01-06 | 天津职业技术师范大学 | A kind of sheet material soft mode thermal forming device based on heterogeneous body metal-rubber and method |
| CN109675998A (en) * | 2019-01-23 | 2019-04-26 | 哈尔滨工业大学 | A kind of viscous pressure forming method of local curvature's mutation sheet cover |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10369613B2 (en) * | 2017-02-06 | 2019-08-06 | GM Global Technology Operations LLC | Die assembly for a stamping press |
-
2021
- 2021-02-10 CN CN202110185174.XA patent/CN112935039B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2341857B1 (en) * | 1973-08-18 | 1975-02-06 | Mueller Hermann Gmbh | Tool arrangement for making pipe arches |
| DE202012002012U1 (en) * | 2012-02-27 | 2013-05-28 | Christoph Lenz | Cold-formed punch for producing a media-tight stamped seam |
| CN203944747U (en) * | 2014-05-21 | 2014-11-19 | 天津市英辰精密模具有限公司 | A kind of diel |
| CN105215127A (en) * | 2015-10-12 | 2016-01-06 | 天津职业技术师范大学 | A kind of sheet material soft mode thermal forming device based on heterogeneous body metal-rubber and method |
| CN109675998A (en) * | 2019-01-23 | 2019-04-26 | 哈尔滨工业大学 | A kind of viscous pressure forming method of local curvature's mutation sheet cover |
Non-Patent Citations (1)
| Title |
|---|
| 板材软模成形数值模拟研究现状;刘建光 等;《材料科学与工艺》;20080630(第3期);第430-434页 * |
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