The experimental analysis of the burnishing process using the methods : NPS

• Autorzy: Dyl T. C.

Identyfikatory

DOI

10.5604/12314005.1213532

• Języki publikacji: EN

Abstrakty

EN

The paper presents selected results of experimental research of burnishing process of the steel tube holes. The ballizing process (NPS) is the method of burnishing where consists of pushing the tool through the hole, wherein the ball is greater in size than the opening of the value of the reduction ratio. Used tools to burnishing are hard and smooth surface. Burnishing elements are made of shape: ball, roll and disk. The ballizing process is carry out by a ball. The precise tube holes are made mostly methods abrasive machining. Machining these methods can usually maintain a within the tolerances established by the constructor size and shape and surface roughness. However, not achieved a satisfactory state surface layer of tube holes. Improve the properties of the surface layer can be obtained after application, as finishing, the slide burnishing. Modelling of the burnishing process using the method, NPS is to determine the impact of a specific curvature a rigid tool with of the workpiece. Ballizing process can increase the dimensional accuracy of tube holes, reducing the surface roughness, the strengthening of the surface layer, compressive residual stresses constitution. Compressive internal stresses substantially influence the fatigue life of machine parts. The aim of experimental research was to obtain surface layer state of compressive residual stress and the material ratio curve of convexity shape.

Słowa kluczowe

EN

ballizing process; steel tube holes; surface plastic forming; roughness surface

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 1
• Strony: 107--113
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Dyl T. C.

• Gdynia Maritime University, Faculty of Marine Engineering Department of Marine Maintenance Morska Street 81-87, 81-225 Gdynia, Paland tel.: [phone], fax: [phone]

Bibliografia

• 1. After ballizing process steel tube holes it was determined that successfully replaces the machining such as grinding, reaming, honing, but not the abrasive contaminants in the surface layer characteristic of the grinding.
• 2. An increase in the value of relative plastic deformation (εnp), the value of the rate increases of surface roughness reduction.
• 3. After ballizing process, an improvement in roughness and condition of the surface and specifically more advantageous share of the material ratio curve.
• 4. The arithmetical mean deviation profile roughness after burnishing process has adopted very low values.
• 5. For relative plastic deformation εnp =1.4% (sample No 23) and εnp = 2.0% (sample No 33) after ballizing process determined that the arithmetical mean deviation of the assessed profile and the material ratio curve surface roughness parameters take the smallest value.
• 6. After the studies carried out, it was determined that the relative plastic deformation has significantly influenced on the alteration roughness of the inner tube holes after burnishing.
• 7. In the paper presented the relationship between relative plastic deformation (εnp) and the surface roughness reduction rate (KRa). Therefore, knowing the initial roughness and the degree of deformation ballizing process you can specify the expected roughness recommended by the producer of a steel tube holes

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.