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    • 4. 发明授权
    • Method for simultaneous peening and smoothing
    • 同时喷丸和平滑的方法
    • US4454740A
    • 1984-06-19
    • US300725
    • 1981-09-10
    • James W. NealJoseph F. Loersch
    • James W. NealJoseph F. Loersch
    • C21D7/06C22F1/00C23C24/04
    • C21D7/06C22F1/00C23C24/04
    • A method for simultaneously shot peening and smoothing includes use of relatively large, smooth, hard, spherical steel shot having a substantially uniform diameter in the range 1-2.5 mm. Titanium workpieces are provided in one step with a compressive stress layer of the order of 0.13 mm and a surface finish of better than 15.times.10.sup.-6 inch AA, compared to conventional peened finishes of the order of 40.times.10.sup.-6 inch AA. Surface finish and peening intensity are inter-related and dependent on shot diameter, mass, velocity, and energy within relatively small limits. The shot diameter is uniform within .+-.0.05 mm; the shot impact velocity is uniform within .+-.4 percent or less, in the range 1.4-12 m/s.
    • 同时喷丸硬化和平滑化的方法包括使用具有在1-2.5mm范围内的基本上均匀直径的较大,光滑,硬的球形钢丸。 相比于40×10 -6英寸AA级的常规喷丸处理,钛工件在一个步骤中具有0.13毫米数量级的压应力层和优于15×10 -6英寸AA的表面光洁度。 表面光洁度和喷丸强度是相关的,并且取决于喷射直径,质量,速度和能量在相对较小的范围内。 射出直径在±0.05mm内均匀; 射击冲击速度在±4%以内是均匀的,在1.4-12m / s的范围内。
    • 8. 发明授权
    • Shot peening apparatus
    • 喷丸硬化设备
    • US4432220A
    • 1984-02-21
    • US300726
    • 1981-09-10
    • Joseph F. LoerschJames W. Neal
    • Joseph F. LoerschJames W. Neal
    • C21D7/02B24C1/00B24C1/10B24C3/00C21D7/06B21J5/00
    • B24C1/00B24C1/10B24C3/00
    • In apparatus for shot peening, gravity is used to accelerate uniform sized steel shot, and thereby impart a combination of good surface finish and uniform compressive stresses to workpieces. It is especially useful for finishing gas turbine airfoils. Shot is introduced into the peening enclosure (28) through a gate (40) at near zero velocity. It is then accelerated along a streamline (31) toward the workpiece (18) with uniform velocity. The workpiece, positioned along the streamline, can be manipulated in three rotational modes: oscillatory rotation to uniformly peen contoured surfaces of a workpiece, periodic incremental rotation to peen different sides of a workpiece; and, tilting motion to enable peening of shoulders (22). The apparatus is especially suited to peening fragile workpieces such as gas turbine airfoils (18). A diverter plate (44) intercepts the shot stream at times when repositioning of a fragile workpiece is undertaken. Thus, possibly damaging impacts are avoided and steady state operation is able to be promptly resumed.
    • 在喷丸硬化装置中,使用重力加速均匀的钢丸,从而赋予工件良好的表面光洁度和均匀压缩应力的组合。 它对于整理燃气轮机翼型特别有用。 射流通过门(40)以接近零速度被引入喷丸罩(28)。 然后沿着流线(31)以均匀的速度朝向工件(18)加速。 沿着流线定位的工件可以以三种旋转模式进行操作:振动旋转到工件的均匀喷丸轮廓表面,周期性地增加旋转到工件的不同侧面; 以及倾斜运动以使肩部(22)硬化。 该装置特别适用于硬化工件,例如燃气轮机翼型件(18)。 在进行易碎工件重新定位的时候,转向板(44)拦截喷射流。 因此,可以避免可能的破坏性影响,并能够迅速恢复稳态运行。
    • 9. 发明授权
    • Duplex peening and smoothing process
    • 双面喷丸和平滑过程
    • US4428213A
    • 1984-01-31
    • US300723
    • 1981-09-10
    • James W. NealJoseph W. SullivanJoseph F. Loersch
    • James W. NealJoseph W. SullivanJoseph F. Loersch
    • C21D7/06F01D5/14
    • C21D7/06
    • Disclosed is a two step process of peening for workpieces having small radii fillets or fragile edges, such as gas turbine airfoils have. In the first step, relatively small size shot of less than 1 mm dia is used to impart a first peening intensity to a workpiece. This results in a first relatively rough surface finish. In the second step, shot of substantially uniform diameter in the range 1-2.5 mm is impacted with uniform velocity to provide a surface finish smoother than 30AA (10.sup.-6 inch). When fillets are peened, improved fatigue life results from the duplex process. When used on edges, where direct edge impact is avoided in the second step, deformed edges are avoided by the process. Yet the workpiece is substantially smooth and the edges have the requisite residual stress distribution.
    • 公开了对具有小的半圆角或脆弱边缘的工件(例如燃气轮机翼型)进行喷丸的两步法。 在第一步骤中,使用小于1mm直径的相对较小的尺寸喷射以对工件施加第一喷丸强度。 这导致了第一个比较粗糙的表面光洁度。 在第二步中,在1-2.5毫米范围内的基本均匀直径的射击以均匀的速度冲击,以提供比30AA(10-6英寸)更光滑的表面光洁度。 当圆角喷丸时,双相过程会导致疲劳寿命的提高。 当在第二步中避免直接边缘冲击的边缘上使用时,通过该过程避免变形的边缘。 然而工件基本上平滑,并且边缘具有必需的残余应力分布。