CN105537363A - Molding device and method for heat expansion of aluminum alloy hollow part - Google Patents
Molding device and method for heat expansion of aluminum alloy hollow part Download PDFInfo
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- CN105537363A CN105537363A CN201510930791.2A CN201510930791A CN105537363A CN 105537363 A CN105537363 A CN 105537363A CN 201510930791 A CN201510930791 A CN 201510930791A CN 105537363 A CN105537363 A CN 105537363A
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- drift
- pipe
- feeding
- supercharging
- alloy
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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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
Abstract
The invention discloses a molding device and method for heat expansion of an aluminum alloy hollow part. The molding device for heat expansion of the aluminum alloy hollow part comprises pressurized punches (2), feeding punches (8), a mold (5), heating wires (10) and elastic elements (3); a pressurized head (4) is arranged at one end of each pressurized punch (2), and the heating wires (10) are arranged in the mold (5); the outer diameter of the feeding punches (8) is equal to the diameter of a pipe blank (6), and the feeding punches (8) plug the two ends of the pipe blank (6) so as to play a role in sealing the pipe blank (6); the heating wires in the mold are utilized for heating the pipe blank to the molding temperature, and at the moment, a low-melting-point alloy is molten into liquid; and under the simultaneous effect of the composite punches at the two ends, heat expansion of the aluminum alloy pipe blank is achieved, and the aluminum alloy hollow part which is complex in space shape and good in performance is finally obtained.
Description
Technical field
The invention belongs to metal hollow component advanced manufacturing technology field, particularly the building mortion of aluminum alloy hollow part temperature bulging and method.
Background technology
Automobile lightweight is the modern important research content of automobile product, the weight now mainly through adopting light alloy material and the method such as " real with empty generation ", variable cross-section to alleviate automobile.Light alloy material is if aluminium alloy is owing to having lower density, and in the field such as Aeronautics and Astronautics, automobile making, application is more and more extensive.But because under room temperature, the plasticity of aluminium alloy is lower, forming property is poor, strongly limit the shaping of light-alloy complicated shape part, and then have impact on the production of aluminium alloy in actual industrial and application.In recent years, the warm bulging adopting method of warm compaction to carry out light-alloy hollow pipe fitting has become the focus of research field.
Because existing hydraulic expanding-forming technology cannot meet the requirement of heating, therefore preparation aluminum alloy hollow part mainly at room temperature directly carries out bulging, i.e. cold forming process, and uses conventional methods, and will there is following shortcoming:
(1) the Plastic Forming performance due to aluminium alloy is very poor, therefore at room temperature directly carries out hydraulic expanding-forming, and the shape of the hollow object that can be shaped is very limited, and this just causes the structure of aluminium alloy bulging hollow object single, cannot meet the demand in market;
(2) aluminium alloy is in cold Bulging Process, and because forming property is not good, material flowing is unreasonable, and the thinning meeting in some region is very serious, and this just causes the quality of drip molding and serviceability greatly to reduce, and limits the use of aluminum alloy hollow part.
Summary of the invention
Existing aluminium alloy hydraulic pressure Bulging Technology, owing to cannot meet the requirement of tubing heating, therefore cannot meet the shaping of Complex Aluminum Alloy hollow object.The present invention is directed to the drawback of existing preparation method, propose new building mortion and method.Adopt the method for warm bulging to prepare the aluminum alloy hollow part of uniform wall thickness, function admirable, efficiently solve the problem that aluminium alloy pipe hydraulic expanding-forming is difficult, forming quality is not high in practical application.
A kind of aluminum alloy hollow part temperature expansion forming device, comprise supercharging drift (2), feeding drift (8), mould (5), heater strip (10), flexible member (3), supercharging drift (2) one end is pressurization head (4), pressurization head (4) connects one end of supercharging axle (11), supercharging axle (11) is through the through hole at described feeding drift (8) middle part, and supercharging axle (11) other end is connected to form compound punch by bolt, nut (1) with feeding drift (8) outside; Mould (5) inside arranges heater strip (10); The equal diameters of feeding drift (8) external diameter and pipe (6), feeding drift (8) gets lodged in the two ends of pipe (6), plays the effect of sealing pipe (6); Pipe (6) inside is filled with low-melting alloy bar (9), supercharging drift (2) inserts between low-melting alloy bar (9), utilize heater strip (10) to add the temperature needed for hot temperature bulging to pipe (6), now low-melting alloy bar (9) all melts as liquid; According to the volume of low-melting alloy, calculate the amount of feeding of compound punch in conjunction with pipe diameter, feeding compound punch, feeding drift (8) feed supplement, supercharging drift (2) extruding low-melting alloy, provides bulging pressure to pipe inside.
Described aluminum alloy hollow part temperature expansion forming device, overlaps have elastic component (3) to transmit the pressure of feeding drift (8) to supercharging drift (2) in the middle part of the bolt of connection supercharging axle (11) and feeding drift (8)
Carry out the method for aluminum alloy hollow part temperature bulging according to described aluminum alloy hollow part temperature expansion forming device, realized through the following steps:
The first step, puts into mould (5) by aluminum-alloy tubes, load pipe, upper and lower mould matched moulds with low-melting alloy bar (9);
Second step, carry out encapsulation process with the two ends, left and right of compound punch to pipe of being combined by supercharging drift and feeding drift, wherein the external diameter of feeding drift is identical with the external diameter of pipe;
3rd step, utilize the heater strip in mould to the temperature needed for heating of pipe blank to warm bulging, now low-melting alloy all melts as liquid;
4th step, utilizes compound punch to carry out bulging to aluminum-alloy tubes, obtains complex-shaped part;
5th step, release, opening mold, take out the part be shaped;
6th step, is put into obtained part in hot water to soak and takes out, finally obtain the complicated hollow object of aluminium alloy.
Described method, in the first step, tubing inside is filled up by low-melting alloy.
Described method, temperature required in warm Bulging Process is 100-150 DEG C.
Beneficial effect:
1, the present invention is that the warm bulging of aluminum alloy hollow part provides a kind of new manufacturing process; The maximum reduction of final drip molding wall thickness is less than 12.5%;
2, present invention efficiently solves the problem of aluminium alloy hydraulic expanding-forming Complex Parts forming difficulty, for improve aluminium alloy forming property, raising forming quality etc., there is great importance simultaneously;
3, the inventive method simple possible, production efficiency is high, has important engineer applied be worth and obvious economic benefit at the engineering field such as Aeronautics and Astronautics, automobile making.
Accompanying drawing explanation
Fig. 1 is aluminium alloy temperature bulging principle schematic;
1 nut, 2 supercharging drifts, 3 flexible members, 4 pressurization heads, 5 moulds, 6 pipes, 7 wedge sections, 8 feeding drifts, 9 low-melting alloy bars, 10 heater strips, 11 supercharging axles.
Detailed description of the invention
Below by specific embodiment, describe the forming technology that 5182 aluminium alloys, 5083 aluminium alloys and 7075 aluminium alloy temperature bulgings become complicated hollow object in detail.
Embodiment 1
With reference to figure 1, aluminum alloy hollow part temperature expansion forming device comprises supercharging drift 2, feeding drift 8, mould 5, heater strip 10, flexible member 3, supercharging drift 2 one end is pressurization head 4, pressurization head 4 connects one end of supercharging axle 11, supercharging axle 11 is through the through hole in the middle part of described feeding drift 8, supercharging axle 11 other end is connected to form compound punch by bolt, nut 1 with feeding drift 8 outside, and in the middle part of the bolt of connection supercharging axle 11 and feeding drift 8, cover has elastic component 3 to transmit the pressure of feeding drift 8 to supercharging drift 2; Mould 5 inside arranges heater strip 10; The equal diameters of feeding drift 8 external diameter and pipe 6, feeding drift 8 gets lodged in the two ends of pipe 6, plays the effect of sealing pipe 6; Pipe 6 inside is filled with low-melting alloy bar 9, and supercharging drift 2 inserts between low-melting alloy bar 9, utilizes heater strip 10 pairs of pipes 6 to add temperature needed for hot temperature bulging, and now low-melting alloy bar 9 all melts as liquid; According to the volume of low-melting alloy, calculate the amount of feeding of compound punch in conjunction with pipe diameter, feeding compound punch, feeding drift (8) feed supplement, the volume entered in low-melting alloy due to supercharging drift 2 becomes large, and extruding low-melting alloy, provides bulging pressure to pipe inside.Supercharging drift is similar to the effect of hydraulic piston, is raised by the pressure of tubing inside and carries out bulging, is boosting medium.
Embodiment 2
5182 aluminium alloys of long 300mm, diameter 50mm, wall thickness 2mm are put into tee joint forming mould by the first step, load pipe, upper and lower mould matched moulds with low-melting alloy bar;
Second step, carry out encapsulation process with the two ends, left and right of compound punch to tubing of being combined by supercharging drift and feeding drift, wherein the external diameter of feeding drift is identical with the external diameter of pipe;
3rd step, utilize heater strip in mould to heating of pipe blank to 150 DEG C, low-melting alloy all melts as liquid;
4th step, utilizes compound punch to carry out bulging to aluminum-alloy tubes, obtains the part of aluminium alloy threeway;
5th step, release, opening mold, take out the part be shaped;
6th step, obtained part is put in the hot water of 100 DEG C soak take out, finally obtain aluminium alloy threeway hollow object.
Embodiment 3
5083 aluminum-alloy tubes of long 350mm, diameter 60mm, wall thickness 3mm are put into square cup mold, are filled up tubing with low-melting alloy bar, upper and lower mould matched moulds by the first step;
Second step, carry out encapsulation process with the two ends, left and right of compound punch to tubing of being combined by supercharging drift and feeding drift, wherein the external diameter of feeding drift is identical with the external diameter of pipe;
3rd step, utilize heater strip in mould to heating of pipe blank to 120 DEG C, now low-melting alloy all melts as liquid;
4th step, utilizes compound punch to carry out bulging to aluminum-alloy tubes, obtains formation of parts;
5th step, release, opening mold, take out the part be shaped;
6th step, is put into obtained part in the hot water of 100 DEG C to soak and takes out, finally obtain the hollow object of aluminium alloy box part.
Embodiment 4
The first step, puts into ladder pipe fitting mold by long 400mm, diameter 40mm, wall thickness 2mm aluminum-alloy tubes, fills up tubing, upper and lower mould matched moulds with low-melting alloy bar;
Second step, carry out encapsulation process with the two ends, left and right of compound punch to tubing of being combined by supercharging drift and feeding drift, wherein the external diameter of feeding drift is identical with the external diameter of pipe;
3rd step, utilize heater strip in mould to heating of pipe blank to 100 DEG C, now low-melting alloy all melts as liquid;
4th step, utilizes compound punch to carry out bulging to aluminum-alloy tubes, obtains the part of stairstepping;
5th step, release, opening mold, take out the part be shaped;
6th step, is put into obtained part in the hot water of 100 DEG C to soak and takes out, finally obtain the stairstepping hollow object of aluminium alloy.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (5)
1. an aluminum alloy hollow part temperature expansion forming device, it is characterized in that, comprise supercharging drift (2), feeding drift (8), mould (5), heater strip (10), flexible member (3), supercharging drift (2) one end is pressurization head (4), pressurization head (4) connects one end of supercharging axle (11), supercharging axle (11) is through the through hole at described feeding drift (8) middle part, and supercharging axle (11) other end is connected to form compound punch by bolt, nut (1) with feeding drift (8) outside; Mould (5) inside arranges heater strip (10); The equal diameters of feeding drift (8) external diameter and pipe (6), feeding drift (8) gets lodged in the two ends of pipe (6), plays the effect of sealing pipe (6); Pipe (6) inside is filled with low-melting alloy bar (9), supercharging drift (2) inserts between low-melting alloy bar (9), utilize heater strip (10) to add the temperature needed for hot temperature bulging to pipe (6), now low-melting alloy bar (9) all melts as liquid; According to the volume of low-melting alloy, calculate the amount of feeding of compound punch in conjunction with pipe diameter, feeding compound punch, feeding drift (8) feed supplement, supercharging drift (2) extruding low-melting alloy, provides bulging pressure to pipe inside.
2. aluminum alloy hollow part temperature expansion forming device according to claim 1, it is characterized in that, in the middle part of the bolt of connection supercharging axle (11) and feeding drift (8), overlap have elastic component (3) to transmit the pressure of feeding drift (8) to supercharging drift (2).
3. aluminum alloy hollow part temperature expansion forming device according to claim 1 and 2 carries out the method for aluminum alloy hollow part temperature bulging, it is characterized in that, is realized through the following steps:
The first step, puts into mould (5) by aluminum-alloy tubes, load pipe, upper and lower mould matched moulds with low-melting alloy bar (9);
Second step, carry out encapsulation process with the two ends, left and right of compound punch to pipe of being combined by supercharging drift and feeding drift, wherein the external diameter of feeding drift is identical with the external diameter of pipe;
3rd step, utilize the heater strip in mould to the temperature needed for heating of pipe blank to warm bulging, now low-melting alloy all melts as liquid;
4th step, utilizes compound punch to carry out bulging to aluminum-alloy tubes, obtains complex-shaped part;
5th step, release, opening mold, take out the part be shaped;
6th step, is put into obtained part in hot water to soak and takes out, finally obtain the complicated hollow object of aluminium alloy.
4. method according to claim 3, is characterized in that: in the first step, tubing inside is filled up by low-melting alloy.
5. method according to claim 3, is characterized in that: temperature required in warm Bulging Process is 100-150 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510930791.2A CN105537363A (en) | 2015-12-15 | 2015-12-15 | Molding device and method for heat expansion of aluminum alloy hollow part |
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| CN201510930791.2A CN105537363A (en) | 2015-12-15 | 2015-12-15 | Molding device and method for heat expansion of aluminum alloy hollow part |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052123A (en) * | 2017-01-05 | 2017-08-18 | 哈尔滨工业大学（威海） | A kind of metal tube part thermal state metal air-pressure forming method |
| CN109482703A (en) * | 2018-12-28 | 2019-03-19 | 哈尔滨工业大学 | A kind of big section difference titanium alloy pipe fitting differential temperature pneumatic shaping method and device |
| CN112877621A (en) * | 2021-01-14 | 2021-06-01 | 西北工业大学 | Cold bulging method for regulating residual stress of aluminum alloy ring piece and improving mechanical property |
| CN113231526A (en) * | 2021-05-28 | 2021-08-10 | 威海盈创金属成形科技有限公司 | Internal pressure automatic forming device and method for large-diameter cylindrical part |
| CN113617918A (en) * | 2021-08-06 | 2021-11-09 | 山东盛润汽车有限公司 | Liquid tank bulging forming principle and process |
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| JP2001212627A (en) * | 2000-01-31 | 2001-08-07 | Opton Co Ltd | Bulge forming machine |
| US20040065394A1 (en) * | 2002-10-04 | 2004-04-08 | Sungwoo Hitech Co., Ltd. | Warm hydro-forming method and apparatus for aluminum alloys |
| CN1751819A (en) * | 2005-10-25 | 2006-03-29 | 哈尔滨工业大学 | Thermal internal high pressure formation method for light alloy tube (or pipe) |
| CN1792493A (en) * | 2005-12-19 | 2006-06-28 | 河南科技大学 | Method for forming magnesium alloy pipe fitting |
| CN1868631A (en) * | 2005-05-25 | 2006-11-29 | 中国科学院金属研究所 | Hydranlic external pressure shaping method and device for fusible internal mould pipe kind parts |
| CN102107240A (en) * | 2009-12-25 | 2011-06-29 | 中国科学院金属研究所 | Simple tube hydro-bulging device and bulging method |
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2015
- 2015-12-15 CN CN201510930791.2A patent/CN105537363A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001212627A (en) * | 2000-01-31 | 2001-08-07 | Opton Co Ltd | Bulge forming machine |
| US20040065394A1 (en) * | 2002-10-04 | 2004-04-08 | Sungwoo Hitech Co., Ltd. | Warm hydro-forming method and apparatus for aluminum alloys |
| CN1868631A (en) * | 2005-05-25 | 2006-11-29 | 中国科学院金属研究所 | Hydranlic external pressure shaping method and device for fusible internal mould pipe kind parts |
| CN1751819A (en) * | 2005-10-25 | 2006-03-29 | 哈尔滨工业大学 | Thermal internal high pressure formation method for light alloy tube (or pipe) |
| CN1792493A (en) * | 2005-12-19 | 2006-06-28 | 河南科技大学 | Method for forming magnesium alloy pipe fitting |
| CN102107240A (en) * | 2009-12-25 | 2011-06-29 | 中国科学院金属研究所 | Simple tube hydro-bulging device and bulging method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052123A (en) * | 2017-01-05 | 2017-08-18 | 哈尔滨工业大学（威海） | A kind of metal tube part thermal state metal air-pressure forming method |
| CN109482703A (en) * | 2018-12-28 | 2019-03-19 | 哈尔滨工业大学 | A kind of big section difference titanium alloy pipe fitting differential temperature pneumatic shaping method and device |
| CN112877621A (en) * | 2021-01-14 | 2021-06-01 | 西北工业大学 | Cold bulging method for regulating residual stress of aluminum alloy ring piece and improving mechanical property |
| CN113231526A (en) * | 2021-05-28 | 2021-08-10 | 威海盈创金属成形科技有限公司 | Internal pressure automatic forming device and method for large-diameter cylindrical part |
| CN113617918A (en) * | 2021-08-06 | 2021-11-09 | 山东盛润汽车有限公司 | Liquid tank bulging forming principle and process |
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Inventor after: Guo Xunzhong Inventor after: Pan Lei Inventor after: Tao Jie Inventor after: Guo Qun Inventor after: Ma Fuye Inventor after: Wang Liuan Inventor before: Guo Xunzhong Inventor before: Pan Lei Inventor before: Tao Jie Inventor before: Ma Fuye Inventor before: Wang Liuan Inventor before: Guo Qun |
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Application publication date: 20160504 |
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