CN100406167C - Powder pressing method and apparatus based on laser shock wave technology - Google Patents
Powder pressing method and apparatus based on laser shock wave technology Download PDFInfo
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- CN100406167C CN100406167C CNB2005100941595A CN200510094159A CN100406167C CN 100406167 C CN100406167 C CN 100406167C CN B2005100941595 A CNB2005100941595 A CN B2005100941595A CN 200510094159 A CN200510094159 A CN 200510094159A CN 100406167 C CN100406167 C CN 100406167C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/356—Working by laser beam, e.g. welding, cutting or boring for surface treatment by shock processing
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- Powder Metallurgy (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
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Abstract
The present invention relates to the field of powder metallurgy, and particularly to provides a powder pressing method and an apparatus thereof on the basis of a laser shock wave technology, which is particularly suitable for the powder pressing of irregular check bars with small size. The apparatus provided by the method is composed of a laser generator, a light guide system, a control apparatus of the laser generator, a restraint layer, an absorption layer material, a powder mould system and a worktable; because laser parameters are precise and controllable and can be loaded by shock repeatedly for multiple times, the present invention can meet the requirements of the powder pressing of different-density check bar blanks.
Description
Technical field
The present invention relates to field of powder metallurgy, refer in particular to a kind of powder pressing method and device, be particularly useful for the press forming of small-sized irregular test specimen based on laser shock wave technology.
Background technology
Traditional powder pressing method is the mechanical compaction method in the powder metallurgy, promptly powder is filled in the mould, utilizes press that piston is exerted pressure then, and the powder in the mould is pressed shaping under the squeezing action of piston.This method not only needs special pressure equipment, and the test specimen porosity of compacting is big, is difficult to press forming for some test specimens in irregular shape in addition.
The most approaching technology of the present invention is a blast powder compaction technology.The blast compacting is to utilize the shock wave of explosive charge generation with powder pressing.This method can obtain high density compacting blank, but blast compacting security is relatively poor, and the blast parameter is wayward, and the blank core is easy to generate and breaks.
Summary of the invention
The objective of the invention is to provide a kind of powder pressing method and device, can satisfy the powder compaction of different densities based on laser shock wave technology.
The invention is characterized in the shock wave that utilizes induced with laser power source, can adopt one-shot or repeatedly impact press forming according to the density requirements of compacting blank as press forming; Whether can adopt indirect compacting or directly compacting respectively according to the work of test specimen shape.
Can adopt indirect compacting for the blank of regular shape is that laser blast wave acts on the piston, makes powder pressing by the piston motion.And for blank in irregular shape, indirectly can adopt direct press forming during compacting inconvenience, promptly powder is filled in the thin-wall metal case, thus laser blast wave act on make on the metal shell shell inwardly compression powder pressing.
The device of implementing this method is characterized in that comprising laser generator control device, laser generator, powder mold system and the workbench that links to each other successively, wherein the powder mold system is divided into indirect pressed powder mold system and two kinds of direct pressed powder mold systems, and press forming powder mold system is made of the mould and the powder of restraint layer, absorbed layer material, piston and the placement piston of combination successively indirectly; Directly press forming powder mold system is made of the absorbed layer material that is mixed with explosive, the metal thin-wall shell of combination successively and powder and the base of placing wherein.
Implementation process of the present invention is as follows:
1. test specimen shape, the size of suppressing as required calculated powder consumption and designing mould or thin-wall metal case.
2. according to energy and the spot diameter of pressing requirements establishment laser controlling program in order to control laser.
3. powder is filled in mould or the metal shell.
4. be coated with the absorbed layer material that is mixed with explosive component at outer surface of piston coating absorbed layer material or on the metal shell surface.
5. whether work is selected to adopt indirect compacting or is directly suppressed indirect pressed powder mold system according to the test specimen shape.
6. according to optimizing the laser pulse that good laser technical parameters is produced by laser generator, shine on the absorbed layer material by constrained layer material, the absorbed layer material is vaporized under laser action, ionization produces shock wave, for indirect compaction piston high-speed motion under the shock wave effect, make powder pressing.Under shock wave and the acting in conjunction of explosive detonation ripple, inwardly shrink compaction of powders for direct pressed metal shell and make powder pressing.
7. the shock wave that simultaneously passes to powder by piston or shell is propagated in powder, is reflected and cause that powder vibrates and make the further compacting of powder, and makes blank density homogenising.
8. can repeatedly impact loading according to test specimen density requirements difference, till meeting the requirements of test specimen density.
Because laser parameter is accurately adjustable, can repeat repeatedly to impact to load according to the blank density requirements and suppress, therefore can satisfy the powder compaction of different densities, the defective that the common excessive blank core that causes of an on-load pressure breaks in the compacting of can also avoiding exploding is compared with the blast compacting and not to be had safety problem.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing:
The indirect powder pressing device schematic diagram of test specimen that Fig. 1 proposes for the present invention based on the regular shape of laser shock wave technology.
The direct powder pressing device schematic diagram of the test specimen in irregular shape based on laser shock wave technology that Fig. 2 proposes for the present invention.
1. laser generator control device 2. laser generators 3. laser beams 4. restraint layers 5. absorbed layer materials 6. pistons 7. moulds 8. powder 9. workbench 10. numerical control devices 11. computers 12. are mixed with absorbed layer material 13. metal thin-wall shells 14. bases of explosive
The specific embodiment
Describe the details and the working condition of the concrete device of the present invention's proposition in detail below in conjunction with accompanying drawing.
The device that carries out powder compaction with this method comprises that laser generator control device 1, laser generator 2, workbench 9 and powder mold system constitute.Wherein the powder mold system is divided into indirect press forming powder mold system and direct press forming powder mold system.Press forming powder mold system is made of restraint layer 4, absorbed layer material 5, piston 6, mould 7 and powder 8 indirectly.Directly press forming powder mold system is made of the absorbed layer material 12 that is mixed with explosive, metal thin-wall shell 13, base 14 and powder 8.
The laser generator produce power is the laser pulse of 8～80 nanoseconds in 10～100 Jiao Er, duration, and the facular model of laser beam 3 can be various modes such as basic mode, multimode, and it is regulated and control by laser generator control device 1.Shine on the absorbed layer material 5 through restraint layer 4 by the laser beam 3 that laser generator 2 produces for indirect press forming shown in Figure 1, make absorbed layer vaporization, ionization produce shock wave, piston 6 moves right under the shock wave effect fast, powder 8 in the compression mould 7, while is transmitted the shock wave that forms fluctuation by the shock wave that piston passes to powder between powder particle, make the further compacting of powder, and because of the propagation of shock wave between powder 8, mould 7, piston 6, reflect to form vibration, thereby make blank density trend towards homogenising.
The laser beam 3 that is produced by laser generator 2 for direct press forming shown in Figure 2 shines directly into metal thin-wall shell 13 surfaces and is mixed with on the absorbed layer material 12 of explosive, absorbed layer material 12 absorbs laser energy and produces shock wave, simultaneously the fuel factor of laser and blast effect cause that again the explosive that mixes in the absorbed layer blasts, and metal thin-wall shell 13 inwardly shrinks compaction of powders 8 under shock wave and the acting in conjunction of explosive detonation ripple makes powder pressing.When shell shrink to finish, the shock wave that passes to powder by shell was propagated between powder and is made the further compacting of powder.
Because laser parameter is accurately controlled, can repeat repeatedly to impact to load according to the blank density requirements and suppress, therefore can satisfy the blank compacting of different densities requirement.And compare with blast compacting and not have safety problem.
Claims (5)
1. the powder pressing method based on laser shock wave technology is characterized in that utilizing the power source of the shock wave of induced with laser as press forming, whether adopts compacting indirectly or directly compacting respectively according to the work of test specimen shape.
2. a kind of powder pressing method according to claim 1 based on laser shock wave technology, it is characterized in that according to optimizing the laser pulse that good laser technical parameters is produced by laser generator, shine on the absorbed layer material by constrained layer material, the absorbed layer material is vaporized under laser action, ionization produces shock wave, suppressing indirectly for the blank employing of regular shape is that laser blast wave acts on the piston, makes powder pressing by the piston motion; And for blank in irregular shape, adopt direct press forming when compacting is inconvenient indirectly, promptly powder is filled in the thin-wall metal case, thus laser blast wave and by the detonation wave acting in conjunction that the explosive charge that laser blast wave causes produces on metal shell, make shell inwardly compression powder pressing; Simultaneously the shock wave that passes to powder by piston or shell is propagated in powder, is reflected and cause that powder vibrates and make the further compacting of powder, and makes blank density homogenising.
3. a kind of powder pressing method based on laser shock wave technology according to claim 1 is characterized in that impacting loading according to test specimen density requirements different mining with one or many, till meeting the requirements of test specimen density.
4. powder pressing device based on laser shock wave technology, it is characterized in that comprising laser generator control device (1), laser generator (2), powder mold system and the workbench (9) that links to each other successively that wherein the powder mold system is by restraint layer (4), absorbed layer material (5), the piston (6) of combination successively and the mould (7) and powder (8) formation of placing piston for the indirect stroke compression moulding device that the test specimen of regular shape adopts.
5. powder pressing device based on laser shock wave technology, it is characterized in that comprising laser generator control device (1), laser generator (2), powder mold system and the workbench (9) that links to each other successively that wherein the powder mold system is made of with base (14) the absorbed layer material (5) that is mixed with explosive, the metal thin-wall shell (13) of combination successively and the powder of placing wherein (8) for the direct impact compression moulding device that test specimen in irregular shape adopts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100941595A CN100406167C (en) | 2005-08-31 | 2005-08-31 | Powder pressing method and apparatus based on laser shock wave technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100941595A CN100406167C (en) | 2005-08-31 | 2005-08-31 | Powder pressing method and apparatus based on laser shock wave technology |
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| Publication Number | Publication Date |
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| CN1772420A CN1772420A (en) | 2006-05-17 |
| CN100406167C true CN100406167C (en) | 2008-07-30 |
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| CNB2005100941595A Expired - Fee Related CN100406167C (en) | 2005-08-31 | 2005-08-31 | Powder pressing method and apparatus based on laser shock wave technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170630A (en) * | 2013-04-19 | 2013-06-26 | 安徽工业大学 | Forming method and device of anisotropic neodymium iron boron bonded permanent magnet |
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| CN101837457B (en) * | 2009-03-18 | 2011-12-21 | 南京理工大学 | Method for preparing nanocrystalline copper by explosive loading and device thereof |
| CN104999773B (en) * | 2015-08-27 | 2017-01-18 | 中国工程物理研究院材料研究所 | Laser precise die pressing thin film preparing method, die pressing device and demoulding device |
| CN105632749B (en) * | 2015-12-29 | 2017-12-05 | 江苏大学 | A kind of preparation method of high-performance anisotropy Nanocomposite magnet |
| CN106181045A (en) * | 2016-08-18 | 2016-12-07 | 江苏大学 | A kind of laser-impact pressure setting compressing for part and method thereof |
| CN106271067B (en) * | 2016-08-18 | 2018-04-03 | 江苏大学 | Strengthen the device and method of foil bonding strength under a kind of Laser shock loading |
| CN109079316A (en) * | 2018-10-25 | 2018-12-25 | 广东工业大学 | A kind of labeling method based on laser-impact |
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| WO2003061868A1 (en) * | 2002-01-25 | 2003-07-31 | Ck Management Ab | A dynamic forging impact energy retention machine |
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2005
- 2005-08-31 CN CNB2005100941595A patent/CN100406167C/en not_active Expired - Fee Related
Patent Citations (5)
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| CN2265262Y (en) * | 1996-04-02 | 1997-10-22 | 吉林工业大学 | Laser sintering thermal extruding device for powder metallurgy parts |
| CN1157198A (en) * | 1996-09-15 | 1997-08-20 | 吉林工业大学 | Heat source non-contact temp, pressure forming method for powder metallurgy pressed compact |
| CN1374165A (en) * | 2001-10-19 | 2002-10-16 | 江苏大学 | Laser shock method and equipment for precise formation |
| WO2003061868A1 (en) * | 2002-01-25 | 2003-07-31 | Ck Management Ab | A dynamic forging impact energy retention machine |
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Non-Patent Citations (4)
| Title |
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| 激光冲击波技术用于材料加工的研究进展. 周建忠，刘会霞，冯爱新，杨超君，王广龙，张兴权，张永康.应用激光，第25卷第1期. 2005 |
| 激光冲击波技术用于材料加工的研究进展. 周建忠，刘会霞，冯爱新，杨超君，王广龙，张兴权，张永康.应用激光，第25卷第1期. 2005 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103170630A (en) * | 2013-04-19 | 2013-06-26 | 安徽工业大学 | Forming method and device of anisotropic neodymium iron boron bonded permanent magnet |
| CN103170630B (en) * | 2013-04-19 | 2015-03-04 | 安徽工业大学 | Forming method and device of anisotropic neodymium iron boron bonded permanent magnet |
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| Publication number | Publication date |
|---|---|
| CN1772420A (en) | 2006-05-17 |
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