摘要:
An ultrasonic machining method to improve the wear resistance of locomotive wheels includes ultrasonic machining by ultrasonic machining tool head on the wheel rim and/or surface of the tread that is rotated along the main axis. The ultrasonic machining method mentioned in the invention can not only process the locomotive wheel just after leaving factory, but also repair the worn locomotive wheel. After machining the rim and/or tread of the locomotive wheel with ultrasonic machining, the surface tensile stress of the rim and/or the tread surface will become compressive stress, the surface roughness will be greatly reduced, and the ideal compressive stress will be preset on the surface. Which will improves the hardness of the surface, refines the grain, significantly increases the wear resistance, improves the wheel-rail contact relationship, reduces the rolling contact fatigue damage of the wheelset, reduces the wear rate of the wheel, and prolongs the wheel repair cycle and service life.
摘要:
A surface roughening apparatus (1) includes a first mold (10) and a second mold (20). The first mold (10) has a plurality of protrusions (12) each formed in an angular shape. The first mold 10 presses a metallic material (50) to form recesses (52) corresponding to the respective shapes of the protrusions (12) in a surface (50a) of the metallic material (50). The second mold (20) has a plurality of protrusions (22) each formed in an angular shape. After the first mold (10) presses the metallic material (50), the second mold (20) presses the metallic material (50), thereby deforming each recess (52) into an undercut shape. A height of each protrusion (12) is greater than that of each protrusion (22). A tip angle of each protrusion (12) is smaller than that of each protrusion (22).
摘要:
Die Erfindung betrifft ein Kalibrierwerkzeug zum Bearbeiten einer Vertiefung in einem Werkstück auf ein Endmaß, wobei die Vertiefung in einer Durchgangsbohrung des Werkstücks angeordnet ist. Das Verfahren betrifft die Bearbeitung einer Vertiefung (30) die vorzugsweise als Paßfedernut ausgeführt ist in einem Werkstück (32) auf ein Endmaß, wobei die Vertiefung (30) in einer Durchbrechung (31) des Werkstücks (32) angeordnet ist. Ein Kalibrierstifthalter (14) der zumindest einen Kalibrierstift (15) aufnimmt wird in einer Führungsbuchse mit einer U-förmigen Führung (19) eingesetzt. Der außen vorstehende Kalibrierstift (15) gegenüber der U-förmigen Führung (19) und der Kalibrierstifthalter (14) ist entlang der U-förmigen Führung (19) verschiebbar.Nach dem Einsetzen der Führungsbuchse (12) und des Kalibrierstifthalters (14) in die Durchbrechung (31) des Werkstücks (32) und beim Hindurchführen des Kalibrierstifts (15) durch die Vertiefung (30) der Kalibrierstift (15) zwei einander gegenüber liegende Seitenflächen der Vertiefung (30) auf ein Endmaß aufweitet
摘要:
A method of improving machine life and repairing machine parts is characterised in that onto a part of a machine (1) at least one layer of metallic coating (2) is applied, preferably a composite in such a manner that an external layer of metallic coating (3) preferably a composite is applied by arc spray and subsequently the external layer of metallic coating (3) is subject to burnishing, preferably ultrasonic burnishing.
摘要:
A method of treating a hole in a metallic component (C) includes the following steps in sequence: forming an hole having a first diameter in the component (C); expanding the hole to a second diameter using a cold expansion process, so as to induce residual compressive stresses in the material surrounding the hole; shot peening the hole; and final machining the hole to a finished diameter.
摘要:
A manufacturing method includes providing a component (10), such as a superalloy aircraft component, with a substrate surface (12) having damaged brittle compound particles (16) from machining. The manufacturing method removes the damaged compound particles (16) from the substrate surface without producing significant amount of new damaged compound particles (16) in the substrate surface (12). In one example, the damaged compound particles (16) are removed with an abrasive media. The method results in a machined substrate surface free from damaged intermetallic component particles.