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    • 2. 发明授权
    • Twin spot laser welding
    • 双点激光焊接
    • US4691093A
    • 1987-09-01
    • US854633
    • 1986-04-22
    • Conrad M. BanasBrian M. Doyle
    • Conrad M. BanasBrian M. Doyle
    • B23K20060101B23K26/02B23K26/067B23K26/00
    • B23K26/0608B23K15/004B23K26/067B23K26/24
    • A novel multiple spot laser welding apparatus includes a bendable mirror capable of deformation, which receives a laser beam at a single reflective surface thereof. A deformation device deforms the single reflective surface of the bendable mirror to provide a plurality of laser sub-beams to a workpiece, generating laser spots on surfaces thereof. The apparatus can be used in a laser welding method that provides a common weld pool formed by laser spots transverse to the weld seam. Another laser welding method provides multiple laser spots oriented along a weld seam producing a common weld pool therebetween. Still another laser welding method provides multiple laser spots along a weld seam producing distinct weld pools.
    • 一种新颖的多点激光焊接装置包括能够变形的可弯曲镜,其在其单个反射表面处接收激光束。 变形装置使可弯曲反射镜的单个反射表面变形,以向工件提供多个激光子光束,在其表面上产生激光光斑。 该设备可以用于激光焊接方法,该方法提供通过横向于焊缝的激光点形成的公共焊池。 另一种激光焊接方法提供沿着焊缝定向的多个激光斑点,其产生在它们之间的公共焊接池。 另一种激光焊接方法沿焊缝提供多个激光点,产生不同的熔池。
    • 3. 发明授权
    • Apparatus for high frequency optical beam oscillation
    • 高频光束振荡装置
    • US4261636A
    • 1981-04-14
    • US1101
    • 1979-01-04
    • Karl A. StetsonConrad M. Banas
    • Karl A. StetsonConrad M. Banas
    • G02B26/08G02B26/10G02B27/17
    • G02B26/10G02B26/0816
    • A mechanical scanning apparatus adapted for oscillating the focus zone of a beam of radiation having high power to modify and control the nature and extent of the interaction zone on a workpiece is disclosed. The apparatus includes a compound beam adapted for being vibrated in a vibratory mode resulting in oscillatory motion of at least a first end of the compound beam; a reflective surface attached to the first end of the compound beam and adapted for focussing radiation incident thereon to a focus zone, and means for vibrating the compound beam to induce oscillatory motion of the reflective surface resulting in oscillatory motion of the focus zone. For vibration frequencies greater than the characteristic thermal response time of the workpiece material, the effect is a broadening of the interaction zone with a beam-material interaction characteristic of a reduced incident average power intensity while maintaining a high local intensity essential to the establishment of effective radiation-material coupling.
    • 公开了一种机械扫描装置,其适用于振荡具有高功率的辐射束的聚焦区域,以修改和控制工件上的相互作用区域的性质和程度。 该装置包括适于以振动模式振动的复合梁,导致复合梁的至少第一端的振荡运动; 反射表面,其附接到复合光束的第一端并且适于将入射到其上的辐射聚焦到聚焦区域;以及用于使复合光束振动以诱导反射表面的振荡运动的装置,导致聚焦区域的振荡运动。 对于大于工件材料的特征热响应时间的振动频率,效应是相互作用区域的扩大,具有降低的入射平均功率强度的束 - 材料相互作用特性,同时保持建立有效的 辐射材料耦合。
    • 4. 发明授权
    • Method of material processing utilizing an interrupted beam of
continuous wave laser radiation
    • 利用连续波激光辐射中断的光束进行材料处理的方法
    • US4152575A
    • 1979-05-01
    • US915085
    • 1978-06-12
    • Conrad M. Banas
    • Conrad M. Banas
    • B23K26/24H01S3/00B23K9/00
    • B23K26/24H01S3/0057
    • A method of material processing, in particular welding, utilizing high frequency interruption of a continuous wave beam of radiation is disclosed. The pulses of laser radiation are generated at a pulse repetition rate more rapid than the thermal response time of the material, typically greater than one kilohertz, wherein the material reacts with the pulses such that the characteristics of the surface reflectivity of the material are dominated by the peak power in the pulse and the characteristics of the melting of the material are controlled by the average power of the pulses. The duration of each pulse is controlled to be less than the time required to generate a beam absorbing plasma adjacent the weld zone. The absence of beam absorbing plasma and the efficient destruction of the reflectivity of the surface of the material results in increased welding efficiency and/or increased welding speed.
    • 公开了一种利用连续波束辐射的高频中断的材料加工方法,特别是焊接方法。 激光辐射的脉冲以比材料的热响应时间更快的脉冲重复频率产生,通常大于1千赫,其中材料与脉冲反应,使得材料的表面反射率的特性由 脉冲的峰值功率和材料的熔化特性由脉冲的平均功率控制。 每个脉冲的持续时间被控制为小于在焊接区附近产生光束吸收等离子体所需的时间。 没有光束吸收等离子体和材料表面的反射率的有效破坏导致提高的焊接效率和/或增加的焊接速度。
    • 5. 发明授权
    • Welding shield and plasma suppressor apparatus
    • 焊接屏蔽和等离子体抑制装置
    • US4078167A
    • 1978-03-07
    • US767110
    • 1977-02-09
    • Conrad M. BanasHarry C. Rogers, Jr.
    • Conrad M. BanasHarry C. Rogers, Jr.
    • B23K10/02B23K9/00B23K9/16
    • B23K10/02B23K26/14B23K26/1464B23K26/1476B23K26/702
    • A welding device capable of providing a blanket of nonreactive gas to isolate atmospheric gases from a weld zone to prevent weld contamination and capable of providing a stream of suppression gas across the path of a welding beam to suppress the formation of a beam absorbing plasma is disclosed. The device comprises a housing having a welding beam entrance port, a structure wall cooperating with the housing to form a first cavity therein and having an exit port aligned with the entrance port, means for supplying suppression gas to the first cavity, means for exhausting the suppression gas from the first cavity, a base cooperating with the housing and the structure wall to form a second cavity within the housing, means for providing a nonreactive gas to the second cavity, and means for passing the nonreactive gas from the second cavity to the weld zone.
    • 一种焊接装置,其能够提供一层非反应性气体,以将大气中的气体与焊接区隔离,以防止焊接污染,并且能够提供穿过焊接梁的路径的抑制气体流,以抑制波束吸收等离子体的形成。 。 该装置包括具有焊接梁入口的壳体,与壳体协作以在其中形成第一腔并具有与入口端口对准的出口的结构壁,用于向第一空腔供应抑制气体的装置, 来自第一腔的抑制气体,与壳体配合的底座和结构壁,以在壳体内形成第二腔,用于向第二腔提供非反应性气体的装置,以及用于将非反应性气体从第二腔传递到 焊接区。
    • 6. 发明授权
    • Fusion zone purification by controlled laser welding
    • 通过受控激光焊接融合区域净化
    • US4000392A
    • 1976-12-28
    • US639145
    • 1975-12-09
    • Conrad M. BanasEdward M. Breinan
    • Conrad M. BanasEdward M. Breinan
    • B23K26/12B23K26/24B23K27/00
    • B23K26/127B23K26/064B23K26/0643B23K26/0648B23K26/0665B23K26/12B23K26/123B23K26/24B23K2203/04B23K2203/05B23K2203/10B23K2203/14
    • A method of accomplishing a controlled weld with a beam of laser radiation is disclosed. The workpiece is cleaned and fitted prior to joining and a flow of a gas is provided in the weld region to prevent the formation of radiation insulating plasma between the laser source and the workpiece and to aspirate gaseous impurities from the weld zone. In addition, a trailing cover gas is provided to both the top and the bottom of the weld until the joint is sufficiently cooled to prevent reaction between the metal and the atmosphere. The beam must contain more than two kilowatts of power and be focusable on the workpiece to a power density of at least one megawatt per square inch in order to produce a keyhole in the fusion zone. Further, a weld speed in excess of twenty inches per minute and a progressive solidification technique of the weld contribute to the expulsion of contaminants from the weld.
    • 公开了一种用激光束照射完成受控焊接的方法。 工件在接合之前被清洁和装配,并且在焊接区域中提供气体流以防止在激光源和工件之间形成辐射绝缘等离子体并且从焊接区域吸出气态杂质。 另外,在焊接的顶部和底部都提供了后盖气体,直到接头被充分冷却以防止金属和大气之间的反应。 梁必须包含超过两千瓦的功率,并可在工件上聚焦至至少1兆瓦/平方英寸的功率密度,以便在熔融区产生锁孔。 此外,超过二十英寸每分钟的焊接速度和焊接的渐进凝固技术有助于从焊缝排出污染物。
    • 10. 发明授权
    • Method and apparatus for high frequency optical beam oscillation
    • 高频光束振荡的方法和装置
    • US4369348A
    • 1983-01-18
    • US186867
    • 1980-09-12
    • Karl A. StetsonConrad M. Banas
    • Karl A. StetsonConrad M. Banas
    • G02B7/182G02B26/10B23K27/00
    • G02B26/10B23K26/082B23K26/32G02B7/1821B23K2203/04B23K2203/10
    • A mechanical scanning apparatus adapted for oscillating the focus zone of a beam of radiation having high power to modify and control the nature and extent of the interaction zone on a workpiece is disclosed. The apparatus includes a compound beam adapted for being vibrated in a vibratory mode resulting in oscillatory motion of at least a first end of the compound beam; a reflective surface attached to the first end of the compound beam and adapted for focussing radiation incident thereon to a focus zone, and means for vibrating the compound beam to induce oscillatory motion of the reflective surface resulting in oscillatory motion of the focus zone. For vibration frequencies greater than the characteristic thermal response time of the workpiece material, the effect is a broadening of the interaction zone with a beam-material interaction characteristic of a reduced incident average power intensity while maintaining a high local intensity essential to the establishment of effective radiation-material coupling.
    • 公开了一种机械扫描装置,其适用于振荡具有高功率的辐射束的聚焦区域,以修改和控制工件上的相互作用区域的性质和程度。 该装置包括适于以振动模式振动的复合梁,导致复合梁的至少第一端的振荡运动; 反射表面,其附接到复合光束的第一端并且适于将入射到其上的辐射聚焦到聚焦区域;以及用于使复合光束振动以诱导反射表面的振荡运动的装置,导致聚焦区域的振荡运动。 对于大于工件材料的特征热响应时间的振动频率,效应是相互作用区域的扩大,具有降低的入射平均功率强度的束 - 材料相互作用特性,同时保持建立有效的 辐射材料耦合。