New Indicators Of Burnished Surface Evaluation – Reasons Of Application

Abstract

Modern production technology requires new ways of surface examination and a special kind of surface profile parameters. Industrial quality inspection needs to be fast, reliable and inexpensive. In this paper it is shown how stochastic surface examination and its proper parameters could be a solution for many industrial problems not necessarily related with smoothing out a manufactured surface. Burnishing is a modern technology widely used in aircraft and automotive industries to the products as well as to process tools. It gives to the machined surface high smoothness, and good fatigue and wear resistance. Every burnished material behaves in a different manner. Process conditions strongly influence the final properties of any specific product. Optimum burnishing conditions should be preserved for any manufactured product. In this paper we deal with samples made of conventional tool steel -Sverker 21 (X153CrMoV12) and powder metallurgy (P/M) tool steel -Vanadis 6. Complete investigations of product properties are impossible to perform (because of constraints related to their cost, time, or lack of suitable equipment). Looking for a global, all-embracing quality indicator it was found that the correlation function and the frequency analysis of burnished surface give useful information for controlling the manufacturing process and evaluating the product quality. We propose three new indicators of burnishing surface quality. Their properties and usefulness are verified with the laboratory measurement of material samples made of the two mentioned kinds of tool steel.

The Influence of Diamond Burnishing Process Parameters on Surface Roughness of Low-Alloyed Aluminium Workpieces

“…Burnishing of external cylindrical surfaces can be done on universal or CNC lathes, and Figure 1 (on the basis of [35,36]) shows how the required compressive force, which must exceed the flow limit of the workpiece material, is generated by a spring integrated in the tool, and then the tool is pulled along the surface of the rotating workpiece at a feed rate (f). Our burnishing experiments were executed with an OPTIMUM type OPTIturn S600 CNC lathe with a PCD spherical burnishing tool (r = 3.5 mm) and the kinematic viscosity of the applied manual dosing oil was ν = 70 mm 2 /s.…”

Investigation of the Effect of Surface Burnishing on Stress Condition and Hardening Phenomena

“…1.) was chosen as the demand is growing for adaption of non-ferrous materials due to their low density and good mechanical properties [6,8,14,26,27,30,31]. Fig.…”

“…It has the same measuring principle as all other hardness measurement equipment: examining how a material is subject to plastic deformation by using a standard force. As the localized plastic deformation at the surface will take place in a 0.01 -0.2 mm thick layer in the subsurface area because of burnishing [8,30,31], and furthermore an aluminium alloy material is examined, during measuring the 136° diamond pulley is pressed at 10 N for 10 seconds on the surface. To make the change in hardness between the turned and the burnished state more illustrative, we created dimensionless ratios, which were calculated using the following formulas:…”

A felületvasalás felkeményedésre és feszültségállapot-változásra gyakorolt hatásának elemzése

“…A kísérletsorozatokhoz gyengén ötvözött alumíniumot választottunk (EN AW-2011), mivel az autó-, repülőgép-és űripari vállalatok egyre inkább megkövetelik a nem-vasalapú anyagok alkalmazását [8][9][10], köszönhetően azok alacsony sűrűségének és jó mechanikai tulajdonságainak.…”