Machine Elements I

Standardisation of components. Dimensional tolerances, splices. Dynamic loading. Safety factor. Materials: injuries, basic properties, selection criteria. Welding Melting advantages-disadvantages, types of seams, gaps forms, seam thickness, strength control, good examples of welded structures. Welding pressure: form connections, cross-checking, examples of good construction. Bolts: General description, tightening torque ratio - axial force and its applications. Screws tightening: prestressing and operating forces, cold precipitation, setting the clamping torque, smooth operation specifications gland, control of resistance. Apply screws, rubber liners. Motion screws. Axes - spindles: Form, function, design. Airframe strength test in accordance with the technical directive VDI-Richtlinie 2226: Dynamic loading, equivalent voltage, size factor, area factor, form factor, retaining factor, security against dynamic fracture and against plastic deformation. Pins, splines. Fixed and mobile spindle couplings, clutches. Rolling bearings: Bearing Types and properties of all kinds, fixed-mobile bearing, floating bearing, bearing with preload, bearing damage, static strength check, lifetime calculation examples fitting of bearings.

Objectives

To gain knowledge about the teachings machine parts, form and function, constraints to which they are subject, calculating the strength, the rules for their use.

Prerequisites

No

Syllabus

Standardisation of components. Dimensional tolerances, splices. Dynamic loading. Safety factor. Materials: injuries, basic properties, selection criteria. Welding Melting advantages-disadvantages, types of seams, gaps forms, seam thickness, strength control, good examples of welded structures. Welding pressure: form connections, cross-checking, examples of good construction. Bolts: General description, tightening torque ratio - axial force and its applications. Screws tightening: prestressing and operating forces, cold precipitation, setting the clamping torque, smooth operation specifications gland, control of resistance. Apply screws, rubber liners. Motion screws. Axes - spindles: Form, function, design. Airframe strength test in accordance with the technical directive VDI-Richtlinie 2226: Dynamic loading, equivalent voltage, size factor, area factor, form factor, retaining factor, security against dynamic fracture and against plastic deformation. Pins, splines. Fixed and mobile spindle couplings, clutches. Rolling bearings: Bearing Types and properties of all kinds, fixed-mobile bearing, floating bearing, bearing with preload, bearing damage, static strength check, lifetime calculation examples fitting of bearings.