WO2005108001A1 - Clamping device for laser welding nickel shims - Google Patents
Clamping device for laser welding nickel shims Download PDFInfo
- Publication number
- WO2005108001A1 WO2005108001A1 PCT/EP2005/004985 EP2005004985W WO2005108001A1 WO 2005108001 A1 WO2005108001 A1 WO 2005108001A1 EP 2005004985 W EP2005004985 W EP 2005004985W WO 2005108001 A1 WO2005108001 A1 WO 2005108001A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clamping device
- clamping
- vacuum
- force
- fixing
- Prior art date
Links
Classifications
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0461—Welding tables
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Definitions
- the invention relates to a clamping device for laser welding
- the forces F1 and F2 indicate the direction of pull of the people. While one person pulls the film off, the tensioning device is held by a second person with F2.
- the magnetic adhesive force which is dependent on the peeling length, is large at the beginning of the peeling and decreases continuously as the sheet is removed. If one of the two people pulls too much, permanent deformation of the welded sheet can occur. The parts can also slip away from the people, the film and that
- the aim of the invention is to improve the clamping tools used, the following requirements and criteria are to be met:
- the parts are to be fixed with respect to the laser beam, taking into account the component tolerance depending on the type of welding joint. A reduction in the joint gap and a distortion during welding should be prevented, which requires a good fixation. Any joining errors that occur should nevertheless be able to be eliminated without great effort.
- the welding point should be easily accessible and allow easy removal of the workpiece without the risk of damage after welding. Splashes and metal vapor deposits can occur during the welding process, the seam underside and seam seams should be protected against oxidation by a protective gas, furthermore the clamping device can also be exposed to laser beams, which has to be taken into account by a suitable material selection of the clamping device.
- the object of the invention is therefore a clamping device for aligning and fixing molded parts to be welded, consisting of at least one lower part with means for holding the molded parts, characterized in that the lower parts are vacuum clamping plates and that the holding forces by means of a fluidic control with at least one Clamping plate for a holding force for aligning the weld metal and a fixing force for welding are variably adjustable.
- the solution to the stated task is a special vacuum clamping device with a special control for the contact pressure.
- vacuum technology is used according to the invention instead of the magnetic clamping device.
- the permanent magnets are replaced by vacuum clamping bars, where the structure shown in Fig.1 a remains essentially unchanged.
- a vacuum clamping device generally consists of a clamping plate and a vacuum pump. Other accessories include liquid separators, valves, rotary unions and multiple distributors.
- the actual clamping force arises from the atmospheric air pressure or the pressure difference between the workpiece top and the clamping plate and is influenced by the size of the clamping surface.
- the principle applies to the application of vacuum clamping technology: the larger the workpiece support, the greater the holding force.
- vacuum technology is important due to the material-independent clamping. Almost all materials such as aluminum, all non-ferrous metals, all plastics, glass, ceramics, graphite, rubber, wood, foils, steel and partly also porous materials can be held. In addition to the clamping surface, all workpiece surfaces (unevenness of the workpiece surface can be carried out to a certain degree) are possible for machining if the device is designed accordingly. Damage or tensioning of the workpieces such as when holding with vices, mechanical or hydraulic quick clamps, or clamps are largely excluded, which is an important aspect for the non-positive and form-fitting joining of the nickel foils.
- Vacuum clamping technology is also suitable for a large number of other types of processing such as grinding, turning, milling, testing, measuring or welding. It is irrelevant whether the workpiece to be clamped has a flat surface or whether it is a spatial component.
- sintered metal plates or ceramic clamping plates are used as vacuum clamping plates.
- Porous sintered clamping plates and ceramic clamping plates are ideally suited for clamping extremely thin-walled parts down to less than 0.1 mm and soft materials (rubber, metal foils). A deformation of the component when fixing is almost completely impossible due to the good contact surface.
- Sintered metal plates are usually made of sintered bronze or aluminum, ceramic clamping plates made of aluminum oxide. Compared to the previous magnetic clamping device, the device according to the invention has the following advantages:
- a high fixing force can be set for the welding process.
- the clamping times are significantly shorter due to the vacuum clamping, since no further mechanical fastenings are required.
- Wood and partly also porous materials can be held with the clamping device.
- FIG.2 An exemplary embodiment of the claimed invention is shown in Fig.2.
- 2 mean the clamping bars, 3 the 2/2 way valves, 4 the vacuum manometer, 5 the display with LED, 6 the adjustable throttle valves.
- the vacuum to be generated must be used in a targeted manner.
- a fluid power circuit diagram with fluid power components, it is not only possible to generate a single constant contact pressure, but also to create variably adjustable forces as required.
- the 2/2 way valves for the adjustable throttle valves are switched to the forward direction, as are the 2/2 way valves for the vacuum pump.
- the maximum achievable vacuum is determined and thus the clamping force for the weld metal is controlled. If the LED of the pressure switch lights up, it is no longer necessary to adjust the throttles. The desired pressure has then been achieved.
- the maximum adhesive force should be set for welding. To do this, the 2/2 way valves for the throttles must be set to the blocking direction, the other 2/2 way valves to the forward direction. This means that the maximum vacuum that can be generated by the vacuum pump can act on the clamping surfaces, making it impossible for the foils to slip.
- four clamping bars are to be used, all of which are individually pneumatically switched. Their length is chosen so that the two variable film widths can be stretched and welded.
- the four vacuum gauges are only used for further securing and to check whether there are any leaks.
- a rotary vacuum pump without oil lubrication can be used as a vacuum pump. These can work maintenance-free over large periods.
- leakage losses mainly depend on the workpiece size, its flatness and roughness. Leakages occur, for example, from the protective gas flowing in on the underside, but they only occur to a small extent.
- liquid separator is not necessary with the present solution. Liquid separators are only used where coolants and lubricants are used. To the tightness of To secure hose connections, special greases are used for vacuum technology for sealing.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05747724A EP1750895A1 (en) | 2004-05-08 | 2005-05-09 | Clamping device for laser welding nickel shims |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004022825 | 2004-05-08 | ||
DE102004022825.6 | 2004-05-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005108001A1 true WO2005108001A1 (en) | 2005-11-17 |
Family
ID=34969125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/004985 WO2005108001A1 (en) | 2004-05-08 | 2005-05-09 | Clamping device for laser welding nickel shims |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1750895A1 (en) |
WO (1) | WO2005108001A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5632915A (en) * | 1994-08-29 | 1997-05-27 | Gerber Garment Technology, Inc. | Laser material processing apparatus and a work table therefor |
US5671910A (en) * | 1992-05-06 | 1997-09-30 | James C. Carne | Vacuum plates |
-
2005
- 2005-05-09 WO PCT/EP2005/004985 patent/WO2005108001A1/en not_active Application Discontinuation
- 2005-05-09 EP EP05747724A patent/EP1750895A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5671910A (en) * | 1992-05-06 | 1997-09-30 | James C. Carne | Vacuum plates |
US5632915A (en) * | 1994-08-29 | 1997-05-27 | Gerber Garment Technology, Inc. | Laser material processing apparatus and a work table therefor |
Also Published As
Publication number | Publication date |
---|---|
EP1750895A1 (en) | 2007-02-14 |
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