Metāla štancēšana ar elastīgu vidi

Dotais darbs ir veltīts mūsdienās svarīgu faktoru pētīšanai, kas ietekmē galvenās ražošanas izmaksas katrai detaļai. Pētījumu pamatā ir no lokšņu materiāla biezumā līdz divi milimetri detaļu mazsēriju ražošana. Darbā tika iegūta informācija, kādu tehnoloģiju vajadzētu izvēlēties izgatavojot detaļas no lokšņu materiāla. Analītiskajā darba daļa tika veikti eksperimenti ar dažādu biezumu un materiālu paraugiem. Tika iegūta informācija par minimālajiem urbumu izmēriem, kurus var iegūt pielietojot štancēšanu ar elastīgu vidi. Darbā tika izskatītas arī aprīkojuma uzlabošanas iespējas. Tika veikta esošā aprīkojuma uzlabošana. Uzlabotais formu veidojošai šablons tika ieviests ražošanas procesā, kā rezultātā uzlabojās detaļas kvalitāte. Darba rezultātā tika veikta tehnoloģiskā procesa analīze. Iegūti secinājumi par štancēšanas ar elastīgo vidi pielietojuma iespējām, tehnoloģiskā procesa priekšrocībām un trūkumiem, salīdzinot ar tradicionālo štancēšanas tehnoloģiju

Metal Stamping with Elastic Media

The given work is devoted to the sheet metal stamping with elastic media, with a thickness up to 2 mm. This method is effective for the small scale production. Compared with a traditional punching technology, stamping with elastic media appears to be much cheaper. However, a weak point is relatively large technological wastage size: it is needed to support force, which holds technological bridge in its place. The latest technical developments give an opportunity to elaborate the three-dimensional surface roughness model for the above motioned surfaces. Thus impact of the 3D surface roughness parameters to the metal stamping with elastic media can be determinate. Furthermore, it is possible to define the surface friction correlations between elastic areas, sheet material and base plate. Keywords: Sheet metal, stamping, elastic media, punching tools, 3D surface roughness

Sheet Material Stamping with Poliyrethane

The article covers a part of the PhD research on sheet metal stamping with elastic media. Calculations have confirmed that stamping with elastic media is much cheaper than traditional punching technology. Nevertheless the weak point of the stamping with elastic media is the relatively large technological wastage size deriving from the need to support forces to hold technological bridges. The metrological achievements allow for the creation of a 3D surface roughness model for the working surfaces of the stamp. In its turn, this 3D surface roughness model can help reduce technological wastages. By knowing the surface friction dependence between sheet material, base plate and elastic area, it is possible to calculate the precise minimal size of the technological bridge

Influence of Flexible Body Contact Deformation on the Linear Dimension Measurement Precision

The common measurement error when measuring the component geometrical dimensions using universal contact measurement instruments is caused by different factors, such as error of the measurement instrument, personal reading errors, effect of surface roughness on the measuring line deviation, influence of contact deformation measurement force, and others. The present article examines one of these factors, i.e. contact deformations under the influence of measurement force. To make precise measurements it is essential to find out the effect of roughness of measured components. High roughness creates additional measurement errors. It is particularly important in the measurement of thin components, flexible materials and films, as well as for components with nanocoating. Flexible bodies in the meaning of this article are components of different shape and sizes made of rubber or soft plastic. This article studies principles of error formation based on the deformation of surface roughness and basic material

Influence of Flexible Body Contact Deformation on the Linear Dimension Measurement Precision

The common measurement error when measuring the component geometrical dimensions using universal contact measurement instruments is caused by different factors, such as error of the measurement instrument, personal reading errors, effect of surface roughness on the measuring line deviation, influence of contact deformation measurement force, and others. The present article examines one of these factors, i.e. contact deformations under the influence of measurement force. To make precise measurements it is essential to find out the effect of roughness of measured components. High roughness creates additional measurement errors. It is particularly important in the measurement of thin components, flexible materials and films, as well as for components with nanocoating. Flexible bodies in the meaning of this article are components of different shape and sizes made of rubber or soft plastic. This article studies principles of error formation based on the deformation of surface roughness and basic material

Design of the Experimental Equipment to Improve Stamping with Elastic Media

This paper outlines experimental analysis of rubberpad forming, combined with part of the PhD research into sheet metal forming with elastic media. This paper covers analysis of the literature on rubber-pad forming and exploration of experimental equipment building. This equipment can be used to test dependence on surface roughness friction in the technological process of stamping with elastic media. By identifying the dependence on friction between the sheet material, base plate and elastic area surfaces, it is possible to precisely calculate the minimum size of the technological bridge. Further research is therefore required in order to enhance the efficiency of rubber pad forming technology. Copyright © (2012) by Danube Adria Association for Automation and Manufacturing (DAAAM)

Diagnostics of Drum Type Wood Shredder Machines

This paper investigates diagnostic methods and proposes modern service technologies for wood-processing equipment. The aim of this study is to ensure systematic, research-based wood-processing services and continuous, no-failure operation of facilities. We describe the working principle of a particular industrial, drum-type wood shredder and discuss the problems that occurred during operation, including potential excess engine load or construction imperfections. Cutting regime calculations are provided, along with a description of actual improvements and a comparison of cutting regimes before and after improvements. The intended result of this research is a monitoring unit which, with help of a few modifications, can be used on any drum-type wood processing equipment

Chip Forming Process in Machining of the Different Structure Stainless Steel with Different Type of Nanocoated Cutting Tools

In this paper one turning insert coating technology, which called Duratomic, is choosen to study the 420 and 304 stainless steel machining process. Coated metal carbide inserts characterize high wear resistance, chemical stability, high hardness and its allowing for highen machining speeds. This multilayer coating technology ensure that each layer has its own function, toughness, wear resistance and reduced friction

Experimental Analysis of the Rubber Pad Forming

This paper outlines experimental analysis of rubber pad forming, combined with part of the PhD research into sheet metal stamping with elastic media. For small-scale production, rubber pad stamping is the best choice for thin sheet metal parts, compared with traditional stamping methods. The drawback of stamping with elastic media is the relatively large amount of technological wastage, resulting from the need to withstand the forces involved and hold the technological bridges. By finding out the surface dependence of friction between the sheet material, base plate and elastic area, it is possible to precisely calculate the minimum size of the technological bridge. Further research is therefore required in order to enhance the efficiency of rubber pad stamping technology

A Novel Grinding Technology and 3d Surface Roughness Parameters of the Cranshaft Bearings

Comprehensive study how to improve the renovation of the shipboard diesel engines crankshaft bearings has been done. This particular paper covers calculations of the applied 3D surface roughness parameters as well as description of the novel grinding equipment for the crankshafts bearing surfaces machining. This technology is suitable to the medium size shipboard diesel engines with crankshaft bearing diameter from 100 up to 350 mm. Its advantage is that it permits to do the surface renovation directly in the engine housing, without removing the crankshaft from the engine. It has been determined, that the optimal microtopographical model of the particular surface is composed by the following parameters: roughness height parameter RaT and two spacing parameters Sm1 and Sm2. Calculations for statistical surface roughness parameters are covered as well. Furthermore calculations of the chosen 3D surface roughness parameters in discrete measurements and chosen parameters equations applicable to elaborated grinding equipment are covered, too