摘要:
The present invention provides a method of forming a leading edge for an aerofoil component e.g. an aerofoil blade. The method comprises forming a pre-form having a precursor edge and processing said precursor edge to form the leading edge. The pre-form is formed using metal injection molding. The leading edge may have an elliptical profile.
摘要:
A bearing comprising a plurality of rolling elements arranged between an inner raceway (12) and an outer raceway (22) of the bearing, whereby a rolling contact interface is defined between a first rolling contact surface (31) on at least one rolling element and a second rolling contact surface formed by one of the inner and outer raceways (12, 22). The first rolling contact surface has a first RMS roughness R q1 and has a first roughness pattern y i , expressed in terms of the Peklenik number y. The second rolling contact surface has a second RMS roughness R q2 and has a second roughness pattern y 2 . To minimise micropitting in the bearing, the rolling contact interface has a surface topography in which: - the roughness pattern of the first and of the second rolling contact surfaces are oriented in the direction of rolling, whereby γ 1 ≥ 3.0 and Y 2 ≥ 10.0; and - the first and of the second rolling contact surfaces have substantially equal roughness heights, whereby 0.8 q1 /R q2 ≤ 1.25
摘要:
A method of post processing a laser peened component to remove a laser remelt layer is proposed. The post processing includes a series of steps including grit blasting, chemical etching and mechanical finishing the component. This will ensure that the mechanical property (i.e., damage tolerance) benefit of laser peening is restored to the surface of the component.
摘要:
The present invention relates to a surface treatment apparatus and method for inducing compressive residual stress in the surface of a workpiece with dimensional variations. The method comprises the acts of measuring the dimensions of the workpiece during a surface treatment operation and adjusting the surface treatment process parameters to account for the measured dimensions. In one embodiment, the apparatus comprises two surface treatment elements oriented in opposition to one another in a caliper configuration. The surface treatment elements are positioned and impinged against the surface of a workpiece by an actuator controlled by a computer control unit. The depth to which the surface treatment elements are impinged is precisely controlled to achieve the desired magnitude and depth of compressive residual stress. A sensor operatively connected to the apparatus senses and relays the dimensions of the workpiece to a computer control unit that adjusts the operating parameters accordingly.
摘要:
A method of manufacturing the component member of a VGS type turbo charger capable of efficiently performing a press forming when the manufacture is performed by the press forming using a die by various engineering improvements applied thereto according to forming method and formed shape, comprising the steps of, to form an accepting hole (25) rotatably holding a variable blade in a turbine frame cited, for example, as the component member, opening a prepared hole (25a) with a diameter equal to or smaller than that of a hole in finished state and pressing a steel ball (B) with a diameter approximately equal to that of the accepting hole (25) in finished state into the prepared hole to provide a specified hole diameter accuracy and an inner surface roughness, characterized in that the steel ball (B) is formed integrally with the tip of a punch part (PU) for pressing the steel ball into the prepared hole.
摘要:
A process of stably forming an ultrafine crystal layer in a surface of a metal product at a low cost. A hole 1 is formed in a workpiece W by a drill D, whereby a large strain is imparted to an inner circumferential surface of the formed hole 1, so as to form the nanocrystal layer C2 in the inner circumferential surface. In this instance, the inner circumferential surface of the hole 1 is subjected to a plastic working causing a true strain of at least 1 in the inner circumferential surface, and a temperature at the machined surface is held in a range which is not lower than its Ac1 transformation point and is lower than its melting point. Alternatively, the temperature is held at a value not higher than its Ac1 transformation point. In such a way, the nanocrystal layer C2 can be stably formed in the inner surface of the hole 1 at a low cost.
摘要翻译:的以低成本在金属制品的表面稳定地形成超细晶体层的方法。 甲孔1在工件W进行钻D,从而大的应变被施加到到达的圆周的内表面上形成1形成,以便形成在所述内周面的纳米晶体层C2。 在这种情况下,孔1的内周面进行塑性加工中的内周表面而造成的至少1的真实应变,而在加工表面的温度被保持在一个范围内的所有这是不低于其 Ac 1相变点,比其熔点低。 替代地,温度在不低于它的Ac1相变点高的值保持。 在寻求一种方法,该纳米晶体层C2,能够稳定地在孔1的内表面以较低的成本形成。