Method for the machining of workpieces by means of several laser beams
First Claim
Patent Images
1. A process for machining a workpiece using a machining laser beam, comprising:
- bringing at least two laser beams together using a beam-combining mechanism;
passing the combined two laser beams through a beam-guide and to the workpiece; and
wherein the laser pulses of the individual laser beams can be changed over in their time succession relative to each other from synchronous to time-displaced and vice-versa.
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Abstract
In material machining by means of laser beams, in particular when engraving for example metal or when blackening and marking on plastic material, there is to be provided a process in which in spite of a high frequency of machining pulses the required minimum energy per pulse is achieved. For that purpose a plurality of laser beams are brought together by way of a beam-combining means and passed by way of a common beam-guide means on to the workpiece and in particular operated in time-displaced relationship.
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Citations
25 Claims
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1. A process for machining a workpiece using a machining laser beam, comprising:
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bringing at least two laser beams together using a beam-combining mechanism;
passing the combined two laser beams through a beam-guide and to the workpiece; and
wherein the laser pulses of the individual laser beams can be changed over in their time succession relative to each other from synchronous to time-displaced and vice-versa. - View Dependent Claims (2, 3, 7, 17)
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4. A process for machining a workpiece using a machining laser beam, comprising:
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bringing at least two laser beams together using a beam-combining mechanism;
passing the combined two laser beams through a beam-guide and to the workpiece; and
wherein the laser beams are discontinuous laser beams and originate from different laser sources which discontinuously output the light and the light pulses arrive in the beam-combining mechanism simultaneously and impinge on the workpiece simultaneously. - View Dependent Claims (6, 15, 16)
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5. A process for machining a workpiece using a machining laser beam, comprising:
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bringing at least two laser beams together using a beam-combining mechanism;
passing the combined two laser beams through a beam-guide and to the workpiece; and
wherein the laser beams are discontinuous laser beams and originate from different laser sources which discontinuously output the light and the light pulses of the two laser sources arrive in the beam-combining mechanism and impinge on the workpiece in mutually time-displaced relationship.
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8. A process for machining a workpiece using a machining laser beam, comprising:
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bringing together at least three laser beams so that the laser beams jointly form the machining laser beam, wherein the laser beams are brought together by;
bringing together a first discontinuous laser beam and a second discontinuous laser beam in a beam-combining mechanism in mutually time-displaced relationship to form a partial machining beam, passing the partial machining beam through an active optical component which can alter the linear polarisation of the partial machining beam and which is activated whenever the first or second laser beam impinges on the active optical component and thereby alters its polarisation to the polarisation of to other laser beam, but is deactivated when the other laser beam impinges on the component, bringing together the linear polarized partial machining beam and a further laser beam in a further beam-combining mechanism to form the machining laser beam, the further laser beam having a linear polarisation that differs from that of the partial machining beam, and passing the machining laser beam through a beam-guide and to the workpiece. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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18. Apparatus for machining a workpiece using a machining laser beam, comprising:
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at least two laser sources producing at least two laser beams, at least one beam-combining mechanism, at least one beam-guide arranged downstream of the beam-combining mechanism for guiding the laser beams of the laser sources in a direction towards the workpiece, and wherein the optical path length from the laser sources to a coupling point in the beam-combining mechanism is equal. - View Dependent Claims (19, 20, 23, 24, 25)
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21. Apparatus for machining a workpiece using a machining laser beam comprising:
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at least two laser sources producing at least two laser beams, at least one beam-combining mechanism, at least one beam-guide arranged downstream of the beam-combining mechanism for guiding the laser beams of the laser sources in a direction towards the workpiece; and
wherein the beam-combining mechanism is pivotable about an axis parallel to an axis that is parallel to the direction of the laser beam just passing therethrough.
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22. Apparatus for machining a workpiece using a machining laser beam, comprising:
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at least two laser sources producing at least two laser beams, at least one beam-combining mechanism, at least one beam-guide arranged downstream of the beam-combining mechanism for guiding the laser beams of the laser sources in a direction towards the workpiece; and
wherein the beam-combining means is pivotable about an axis that is parallel to an axis perpendicular to the direction of the laser beam just passing therethrough.
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Specification