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    • 2. 发明申请
    • Laser welding seam with reduced end-crater and process for production thereof
    • 具有减少的终点火山口的激光焊缝及其制造方法
    • US20060222457A1
    • 2006-10-05
    • US11344809
    • 2006-02-01
    • Wolfgang BeckerJens BuhlerTilman FroschmeierKlaus GothMarkus KnollerClaus-Dieter ReinigerDaniel Zauner
    • Wolfgang BeckerJens BuhlerTilman FroschmeierKlaus GothMarkus KnollerClaus-Dieter ReinigerDaniel Zauner
    • B23K26/28
    • B23K26/28B23K26/702Y10T403/477
    • During laser beam welding a so-called end crater forms at the end of the weld seam. The end crater is formed by the volume shrinkage of the solidifying melt after the laser beam reaches the seam end and is switched off or repositioned. The end crater acts as a geometric notch or groove and deteriorates the mechanical properties of the weld seam, so that holes or tears in the area of the end crater can occur. The task of the present invention as comprised therein, of providing a laser weld seam with reduced end crater and a process for production thereof. The task is solved thereby, that the seam end is provided at a location, which exhibits a excessive material relative to the surrounding surface or thereby, that the seam towards the seam end exhibits a counter-running direction change of its preferred direction, which is designed in such a manner, that as a consequence of the interaction between cooling forward and counter-running seam a backfill of the melt towards the seam end occurs.
    • 在激光束焊接期间,在焊缝的末端形成所谓的端部火山口。 端部火山口由激光束到达接缝端部之后的凝固熔体的体积收缩而形成,并且被切断或重新定位。 端部火山口用作几何切口或凹槽,并且使焊缝的机械性能恶化,从而可能发生端部火山口区域中的孔或眼泪。 包括其中的本发明的任务是提供具有减少端部火山口的激光焊缝及其制造方法。 因此解决了这个任务,即接缝端部设置在相对于周围表面显示过量的材料的位置上,或者由此形成朝向接缝端部的接缝呈现其优选方向的反向运动方向变化, 以这样的方式设计,由于冷却向前和反向运行的接缝之间的相互作用的结果,熔体朝向接缝端的回填发生。
    • 5. 发明申请
    • Process for laser welding coated plates
    • 激光焊接涂层板的工艺
    • US20060144826A1
    • 2006-07-06
    • US10790388
    • 2004-03-01
    • Wolfgang BeckerMarkus BeckKlaus GothMike PaelmerClaus-Dieter ReinigerDaniel Zauner
    • Wolfgang BeckerMarkus BeckKlaus GothMike PaelmerClaus-Dieter ReinigerDaniel Zauner
    • B23K26/20
    • B29C65/16B23K26/32B23K2101/001B23K2101/34B23K2103/08B23K2103/50B29C66/91645B29C66/93441B29C66/939
    • With many coated plates, in particular zinc (galvanized) and organic coated sheet metal as are employed in the automobile industry, the coating material has a significantly lower boiling point than the melting point of the sheet metal material. Therefore in the case of laser welding of this type of sheet metal with zero gap in the overlap abutment area to a explosion like vaporization of coating material, which take along or entrain molten sheet metal material and strongly damage the quality of the joint. For improving the connection it has already been proposed that no gap be provided between the sheets, but rather these are positioned directly over each other and then first by means of first laser beam to warm until vaporization of the coating and subsequently to weld the uncoated sheets by means of a second laser beam. The disadvantage therein is above all the elaborate apparatus set up or complexity for the two required optical systems. The task of the present invention is thus comprised therein, to reduce the apparatus complexity and at the same time to at least maintain the work quality, preferably to improve it. The task is solved by a process in which by means of a signal laser beam first all plates can be uncoated and thereafter the plates are welded along the uncoated area with the same laser beam.
    • 对于汽车工业中使用的许多涂覆板,特别是锌(镀锌)和有机涂层金属板,涂层材料的沸点明显低于金属板材的熔点。 因此,在重叠对接区域的这种类型的金属片的激光焊接激光焊接时,会发生像涂层材料的蒸发一样的爆炸,这种爆炸伴随或夹带熔融的金属板材料并严重损坏接头的质量。 为了改善连接,已经提出在片材之间不设置间隙,而是直接位于彼此之间,然后首先通过第一激光束加热直到涂层蒸发,然后焊接未涂覆的片材 借助于第二激光束。 其中的缺点首先是两个所需的光学系统的复杂设备设置或复杂性。 因此,本发明的任务包括在内,以减少设备的复杂性,并同时至少保持工作质量,优选地改进它。 这个任务是通过一个过程来解决的,其中通过信号激光束首先所有的板可以是未涂覆的,然后用相同的激光束沿着未涂覆的区域焊接板。
    • 9. 发明授权
    • Method for the laser machining of coated sheets
    • 涂层纸的激光加工方法
    • US07939779B2
    • 2011-05-10
    • US10526989
    • 2003-09-03
    • Daniel ZaunerClaus-Dieter ReinigerWolfgang BeckerKlaus GothMike Paelmer
    • Daniel ZaunerClaus-Dieter ReinigerWolfgang BeckerKlaus GothMike Paelmer
    • G02B5/00
    • B23K26/10B23K26/60B23K2101/34B23K2103/08
    • With many coated sheets, in particular zinc-coated sheets as used in the automobile industry, the coating material has a much lower boiling point than the material of the sheet. On welding said sheets together the above leads to explosive evaporation of coating material which seriously affects the quality of the connection. In order to improve the quality of the connection it has already been disclosed that narrow gaps between the sheets can be produced by means of spacers, through which the coating material can escape. The spacers can be produced for example, by means of laser bombardment of the sheets. A disadvantage is the relatively long time necessary for machining, which causes large costs in particular for serial production. The aim of the invention is to reduce the time necessary for machining the sheets whilst at least maintaining, preferably improving the quality of the machining. Said aim is achieved, by means of a method, whereby the laser beam is deflected onto the surface by means of a scanner device. A scanner device is a particularly rapid and flexible beam-diverting device. The above permits a reduction in the machining time by a factor of 10 without reducing the quality of the machining.
    • 对于许多涂覆片材,特别是用于汽车工业的镀锌片材,涂料具有比片材材料低得多的沸点。 在将所述片材焊接在一起时,上述导致涂层材料的爆炸性蒸发,这严重影响了连接的质量。 为了提高连接的质量,已经公开了通过间隔件可以产生薄片之间的狭窄间隙,涂层材料可以通过间隔件逸出。 间隔物可以例如通过激光轰击片材来制造。 缺点是加工所需的时间相对较长,尤其是连续生产的成本较高。 本发明的目的是减少加工片材所需的时间,同时至少维持,优选地提高加工质量。 所述目的通过一种方法实现,由此激光束通过扫描器装置偏转到表面上。 扫描仪装置是特别快速和灵活的光束转向装置。 上述允许在不降低加工质量的情况下将加工时间缩短10倍。