DE102009024450A1 - Separation method for workpieces, separation device and use of an electron beam source - Google Patents

Separation method for workpieces, separation device and use of an electron beam source Download PDF

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Publication number
DE102009024450A1
DE102009024450A1 DE102009024450A DE102009024450A DE102009024450A1 DE 102009024450 A1 DE102009024450 A1 DE 102009024450A1 DE 102009024450 A DE102009024450 A DE 102009024450A DE 102009024450 A DE102009024450 A DE 102009024450A DE 102009024450 A1 DE102009024450 A1 DE 102009024450A1
Authority
DE
Germany
Prior art keywords
separation
electron
workpiece
free
workpieces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE102009024450A
Other languages
German (de)
Inventor
Daniel Fritsche
Thomas Dr. Krüssel
Jürgen Seilkopf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PRO BEAM TECHNOLOGIES GmbH
PRO-BEAM TECHNOLOGIES GmbH
Original Assignee
PRO BEAM TECHNOLOGIES GmbH
PRO-BEAM TECHNOLOGIES GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PRO BEAM TECHNOLOGIES GmbH, PRO-BEAM TECHNOLOGIES GmbH filed Critical PRO BEAM TECHNOLOGIES GmbH
Priority to DE102009024450A priority Critical patent/DE102009024450A1/en
Publication of DE102009024450A1 publication Critical patent/DE102009024450A1/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00Electron-beam welding or cutting
    • B23K15/06Electron-beam welding or cutting within a vacuum chamber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00Electron-beam welding or cutting
    • B23K15/0013Positioning or observing workpieces, e.g. with respect to the impact; Aligning, aiming or focusing electronbeams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00Electron-beam welding or cutting
    • B23K15/08Removing material, e.g. by cutting, by hole drilling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/22Nets, wire fabrics or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • B23K2103/16Composite materials, e.g. fibre reinforced

Abstract

In order to efficiently carry out a separation process for workpieces with regions of material-free material structure, it is proposed to guide an electron beam (14) along a predeterminable separation line over the workpiece (16).

Description

  • The The invention relates to a separation method for workpieces with partially material-free Material structure and a separator for performing the Method and use of an electron beam source.
  • Out the prior art are separation methods and separation devices known, with whose help workpieces can be divided and / or provided with recesses. Next a large number of separation methods with geometrically determined cutting edges and geometrically indeterminate cutting edge such as saws or cutoffs also contactless separation processes such as flame cutting for metallic Materials, laser cutting for a variety of different materials and water jet cutting, that in particular for hard materials is known. Each of the above Separation process requires fulfillment a number of constraints to get a good separation result to get. Moreover, each of the separation methods is only for a particular one Spectrum of materials to be processed suitable.
  • The The object of the invention is to provide a separation method for workpieces provide partially material-free material structure.
  • These The object is achieved by a method having the features of the claim 1 solved.
  • at the method according to claim 1 is advantageous that due to the strong interaction of the electron beam with the material structure a high cutting performance and thus a compared to other separation methods high cutting speed can be achieved. This is especially true in comparison to the known laser cutting method. Furthermore, the use of an electron beam allows Cuts with a big one Aspect ratio, d. H. with a big one Cutting depth and a small cutting width, so that also workpieces with large material thickness through very fine cuts, that is with narrow kerfs, can be separated from each other. The predetermined dividing line is preferably a continuous cutting line, if complete Separation of workpieces is made. Likewise, it can be provided by means of the electron beam only cutouts from workpieces separate out.
  • advantageous Further developments of the invention are the subject of dependent claims.
  • at the method according to the claim 2 is advantageous that the efficiency of the separation process in Vacuum is particularly high, so that with little energy high separation efficiency can be achieved. Small workpieces will be Completely housed in a vacuum chamber, larger workpieces may depend on their material structure also only partially vacuum-loaded. Thus, can the equipment required for the implementation of the method even for large workpieces low being held.
  • at the method according to the claim 3 is advantageous that a variety of materials with different Material structures can be edited.
  • At the Method according to the claim 4 is advantageous in that the electron beam is particularly precise and reproducibly guided becomes. In the process implementation can static charge the workpiece by placing the workpiece on a potential-free, preferably grounded, workpiece carrier avoided become. This will build up an electric potential avoided, which could lead to a deterioration of the cutting performance.
  • at the method according to the claim 5 is advantageous that workpieces from the listed materials due to their strength properties so far exclusively with Laser cutting in satisfactory quality to separate were and now by the use of an electron beam at same or improved cut quality separated much faster can be. Such materials could hitherto with separation processes in which geometrically determined or indefinite cutting edges are used, can not be satisfactorily processed because of the addressed materials (Knitted, woven, knitted) a partial ripping of Fibers can occur. With contactless separation process, in particular Waterjet cutting, could also not satisfactory Be achieved results, since the water jet used Abrasives are stored in the material structure and thus the workpiece pollute.
  • at the method according to the claim 6 is advantageous in that thereby a narrow local heating of the takes place to be separated workpiece, while surrounding areas are subjected to virtually no warming and Thus material properties in the cutting area are not or only slightly changed. In this case, the electron beam as a continuous beam or act as a pulsed beam on the workpiece, depending on the material structure a favorable cutting result to achieve.
  • In the method according to claim 7 is advantageous that hereby a very narrow parting line between the Be to be separated from each other rich of the workpiece can be achieved, so that the workpiece is only a small waste and only a small amount of material must be melted to perform the separation process. Thereby, the separation process can be performed at high speed.
  • at the method according to the claim 8 is advantageous in that the cut edge has a surface structure that has for many use cases none Post-processing is needed and especially for crocheted, knitted fabrics or tissues through the fused fiber structures a closed cut edge is formed, which is a resolution of the Counteracts fiber composite.
  • at the method according to the claim 9 is advantageous that thereby the process costs in the implementation of Can be kept low, because no expensive inert gases provided for the procedure Need to become. Likewise omitted a time-consuming Injecting or discharging from a workspace filled with inert gas, as is the case in particular with the use of laser cutting methods is required.
  • According to one Another aspect of the invention is a separating device with the Features of claim 10 is provided. The relative mobility between electron beam source and workpiece carrier can by a corresponding Arrangement of the electron beam source and / or by a movable Workpiece carrier reached become. Preferably, a relative movement between the electron beam source and workpiece carrier in at least two spatial directions possible. By at least one pivot axis for the electron beam source can Even complex cutting geometries are executed. Preferably the electron beam source and the workpiece in a common vacuum chamber added.
  • One Another aspect of the invention is the use of an electron beam source according to the claim 11th
  • below is an embodiment of Invention with reference to the drawing described. In this, the single figure shows a schematic Representation of an electron beam source for separating workpieces with partially material-free material structure.
  • An electron gun 10 is in a vacuum chamber 12 arranged and sends an electron beam 14 on a workpiece to be separated 16 out. The workpiece 16 is on an XY table 18 applied, which is a relative movement of the workpiece 16 against over the electron gun 10 allows in two mutually perpendicular directions in space. The workpiece 16 is produced as knitted fabric from metal threads which are intertwined and / or pressed together in such a way that they form a substantially shape-resistant material structure. Between the individual metal threads of the workpiece 16 are material-free, air-filled spaces.
  • The electron gun 10 has a filament 20 , a Wehnelt cylinder 22 and two plate pairs each offset by 90 ° from each other 24 . 26 on. By applying an electrical voltage to the filament 20 This is heated so much that they are under the influence of the Wehneltzylinders 22 , the opposite of the filament 20 is at negative electrical potential, electrons in the direction of the Wehneltzylinders 22 emitted. The electrons are bundled by the applied potential difference to a beam through the in the Wehneltzylinder 22 provided hole in the direction of the workpiece 16 passes. The Wehnelt cylinder 22 downstream plate pairs 24 and 26 can be acted upon by control voltages not shown for steering and shaping of the electron beam. The thus concentrated to a thin, high-energy beam electron beam 14 passes through one at the bottom of the electron gun 10 attached, on one opposite the filament 20 positive electric potential lying anode plate 28 through and going in the direction of the workpiece 16 issued.
  • Due to the interaction of the on the workpiece 16 incoming, high-energy electrons with the material structure of the workpiece 16 occurs a local melting of the metal filaments, which are severed in the melting region and - as in the 1 is shown schematically - due to the surface tension of the melt each end form a small metal ball. Through the electron beam 14 The stacked metal threads are melted through, allowing a complete separation of the workpiece 16 is reached. By a relative movement of the workpiece 16 opposite the electron gun 10 can cut patterns in the workpiece 16 are introduced so that almost any shapes from the workpiece 16 can be cut out.
  • To carry out the separation process, it is important that the workpiece 16 Has cavities or spaces in which the molten material can retreat due to its surface tension. Evaporation of the material is not desirable because this uneconomically large amounts of energy would have to be used and also the evaporated material would be reflected elsewhere, resulting in contamination of the workpiece 16 and the electron gun 10 could lead.
  • The XY table 18 is to ensure the potential freedom of the workpiece 16 during irradiation with the electron beam 14 via a grounding line 30 grounded, leaving a stream of the as an electron beam 14 on the workpiece 16 incident electrons can take place.

Claims (11)

  1. Separation method for workpieces ( 16 ) with partially material-free material structure, characterized in that an electron beam ( 14 ) along a predefinable parting line over the workpiece ( 16 ) to be led.
  2. Separating method according to claim 1, characterized in that the workpiece ( 16 ) at least in the impact area of the electron beam ( 14 ) is vacuum-charged.
  3. Separation method according to claim 1 or 2, characterized in that a volume fraction of material-free areas of the workpiece ( 16 ) is more than 0.1%.
  4. Separation method according to one of the preceding claims, characterized in that the workpiece ( 16 ) is free of electrical potential during the separation process.
  5. Separation method according to one of the preceding claims, characterized in that the workpiece ( 16 ) has a partially material-free material structure from the group: sintered material, knitted fabric, woven fabric, knitted fabric, sponge, foam, in particular with metal content.
  6. Separation method according to one of the preceding claims, characterized in that the electron beam has a power density of at least 100,000 watts / cm 2 .
  7. Separation method according to one of the preceding claims, characterized in that the electron beam has a focal spot with a Diameter of less than 0.5 mm.
  8. Separation method according to one of the preceding claims, characterized characterized in that the power density of the electron beam so is set, that the workpiece partially melted and molten material evades into material-free areas and / or evaporates and / or sublimates.
  9. Separation method according to one of the preceding claims, characterized characterized in that ambient air, preferably under negative pressure standing ambient air, used as process fluid for the separation process becomes.
  10. Separating device for carrying out the method according to a the claims 1 to 9, characterized in that at least one electron beam source and a workpiece carrier relative are arranged to move each other.
  11. Use of an electron beam source for performing a Separation method, in particular according to one of claims 1 to 9, on workpieces with partially material-free material structure.
DE102009024450A 2009-06-10 2009-06-10 Separation method for workpieces, separation device and use of an electron beam source Pending DE102009024450A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102009024450A DE102009024450A1 (en) 2009-06-10 2009-06-10 Separation method for workpieces, separation device and use of an electron beam source

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009024450A DE102009024450A1 (en) 2009-06-10 2009-06-10 Separation method for workpieces, separation device and use of an electron beam source
PCT/EP2010/003481 WO2010142444A1 (en) 2009-06-10 2010-06-10 Separation method for work pieces having a material structure that in some regions is free of material, separation device and use of an electron beam source

Publications (1)

Publication Number Publication Date
DE102009024450A1 true DE102009024450A1 (en) 2010-12-16

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DE102009024450A Pending DE102009024450A1 (en) 2009-06-10 2009-06-10 Separation method for workpieces, separation device and use of an electron beam source

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DE (1) DE102009024450A1 (en)
WO (1) WO2010142444A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160083898A1 (en) * 2013-05-16 2016-03-24 Laserax Inc. Process and system for laser-cutting a shape in a moving web

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417222A (en) * 1965-03-01 1968-12-17 Gen Electric Apparatus for holding electrically non-conductive material and improving electron beam cutting thereof
US3737036A (en) * 1970-08-26 1973-06-05 Bendix Corp Filter for polymer processing and method of manufacture
DE2443563B2 (en) * 1974-09-12 1979-06-28 Institut Elektrosvarki Imeni E.O. Patona Akademii Nauk Ukrainskoj Ssr, Kiew (Sowjetunion)
JPS58141886A (en) * 1982-02-19 1983-08-23 Sumitomo Electric Ind Ltd Production of sintered hard parts having intricate shape
EP0912267B1 (en) * 1996-05-03 2000-02-09 Inter-Caylian Anstalt Arrangement and method for producing expanded material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320475A (en) * 1963-04-30 1967-05-16 Gen Electric Nonthermionic hollow cathode electron beam apparatus
US3301949A (en) * 1964-03-02 1967-01-31 United Aircraft Corp Stored image control system for beam machining
JPS6448690A (en) * 1987-08-17 1989-02-23 Mitsubishi Electric Corp Cutting method for metal made mesh cloth
JP2597891B2 (en) * 1988-07-04 1997-04-09 産栄機設株式会社 Papermaking wet mat and cutting method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417222A (en) * 1965-03-01 1968-12-17 Gen Electric Apparatus for holding electrically non-conductive material and improving electron beam cutting thereof
US3737036A (en) * 1970-08-26 1973-06-05 Bendix Corp Filter for polymer processing and method of manufacture
DE2443563B2 (en) * 1974-09-12 1979-06-28 Institut Elektrosvarki Imeni E.O. Patona Akademii Nauk Ukrainskoj Ssr, Kiew (Sowjetunion)
JPS58141886A (en) * 1982-02-19 1983-08-23 Sumitomo Electric Ind Ltd Production of sintered hard parts having intricate shape
EP0912267B1 (en) * 1996-05-03 2000-02-09 Inter-Caylian Anstalt Arrangement and method for producing expanded material

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