Experimental Study on Working Parameters of Automatic Self-adjusting Deck Plates Corn Header

According to the forage of mountain region harvesting requirements, a transmission of montanic mower conditioner was designed. The drive system was combined with automatic tension sprocket and double chain wheel of upper and lower crushers, firstly, to realize the automatic regulation and relative motion of two flattening roller, secondly, the power was passed to reel device and achieved forage feeding function; the off-center slider crank mechanism drove the horizontal header to realize the grass cutting function. Through the theoretical analysis and experimental study of the system working performance, applied comprehensive scoring method to obtain the optimal combination of working parameters: the cutting ration was3, the press roller circumferential speed was 4.5m/s, the reel speed ratio was 3. Measured with the optimal combination of operational parameters, the results showed that: the working stubble was 40mm, the recutting rate was 0.8%, the flattening ratio was 42.8% and the crushed grass loss rate was 2.3%, which could meet the demand of forage harvest operation.

Download Full-text

Experimental Study on Unsynchronized Ultrasonic Assistance of Electro Discharge Machining Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.657.241 ◽

2014 ◽

Vol 657 ◽

pp. 241-245

Author(s):

Sergiu Nanu ◽

Niculae Marinescu ◽

Daniel Ghiculescu

Keyword(s):

Experimental Study ◽

Electrical Discharge Machining ◽

Machining Process ◽

Plastic State ◽

Technological Parameters ◽

Workpiece Material ◽

Electrode Tool ◽

Working Parameters ◽

Experimental Data Analysis ◽

Edm Process

The paper deals with experimental study on unsynchronised (out of phase) ultrasonic assistance (US) of electrical discharge machining (EDM) process, considering finishing and semi-finishing operations. The main output technological parameters at classic EDM are not as good as they are expected due to instability of material removal process and long duration of gas bubble formed around plasma channel. The US longitudinal oscillations of electrode-tool produce cavitation within frontal working gap leading to collective implosion of gas bubbles. This hydraulic phenomenon can remove the workpiece material in solid or plastic state or even in liquid state. The goal of our study is to emphasize and quantify the influence of US assistance into EDM process and also to determine a correlation between EDM and US parameters, considering an unsynchronised condition. Nevertheless some optimization conditions of working parameters are needed to attain notable expected performances. From experimental data analysis, it can be noticed that significant growth in process productivity is achieved when EDM process frequency is equal with the ultrasonic assistance frequency.

Download Full-text

Experimental Manipulation of Gold Nano-Particles by Atomic Force Microscope and Investigating Effect of Various Working Parameters

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.829.831 ◽

2013 ◽

Vol 829 ◽

pp. 831-835

Author(s):

Seyed Abbas Shahmoradi Zavareh ◽

Hamid Akbari Moayyer ◽

Mohammad Amin Ahouei

Keyword(s):

Experimental Study ◽

Atomic Force Microscope ◽

Scanning Speed ◽

Experimental Manipulation ◽

Nano Particles ◽

Mica Surface ◽

Contact Mode ◽

Atomic Force ◽

Gold Nano Particles ◽

Working Parameters

Due to involvement of various fields of engineering and bio researchers in nanoprojects and their need in achieving certain layout of nanoparticles (NPs) in many research studies, considerable attention is paid to nanomanipulation nowadays. The present experimental study employs Atomic Force Microscope (AFM) in order to push gold nanoparticles on a highly flat mica surface. A silicon probe in contact mode is used to both image and manipulate nanoparticles and Topo and L-R images have been obtained to show the successes of manipulation when proper conditions are fulfilled. The effect of AFM parameters such as applied force, scanning speed and number of pixels of image on nanomanipulation efficiency is investigated. Moreover, the tip is moved along a special path which can be set by software to study manipulation of nanoparticles aggregates. Finally, possible applications of nanomanipulation in nanomechanics, nanoelectronics, nanomaterials and bio-technology are reported and further experimental research works on nanomanipulation are proposed.

Download Full-text

Study the Surface and Chip Formation of Wood Materials by Milling Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1047.74 ◽

2021 ◽

Vol 1047 ◽

pp. 74-81

Author(s):

Nguyen Huu Loc ◽

Tring Quoc Hung

Keyword(s):

Experimental Study ◽

Chip Formation ◽

Chip Thickness ◽

Response Surfaces ◽

Geometrical Parameters ◽

Milling Cutter ◽

Milled Surface ◽

Milling Method ◽

Working Parameters ◽

Tip Radius

This paper discusses the experimental study and the mechanism of chip formation, sliding and cutting in processing wood milling surface. The main objective is to determine chip thickness upon the coefficient k and tool tip radius ρ. Technically, when analysing we use FCCCD's second-order response surfaces method and analysis of variance (ANOVA) for determining the coefficient k upon the factors of milling cutter diameter D, the feeding per tooth Sz and tool tip radius ρ. According to the obtained experimental results, we determined the value domain of the machine's working factors so that the cutter tool tip can slide or cut the chip on the milled surface of tropical wood materials. From the coefficient k, we can determine the slide length Lsl which gives reason for the abrasion phenomenon of the front or rear sides of the cutter. The results allow us to choose the geometrical parameters for milling cutter, apart from the working parameters for processing the surface of wood materials with the highest quality as possible.

Download Full-text

Determination of working parameters of measure to ensure metrological research tribological characteristics of plain bearings

Forestry Engineering Journal ◽

10.12737/19969 ◽

2017 ◽

Vol 6 (2) ◽

pp. 123-129

Author(s):

Серебрянский ◽

Aleksey Serebryanskiy

Keyword(s):

Experimental Study ◽

Experimental Studies ◽

Design Parameters ◽

Laboratory Equipment ◽

The Real ◽

Metrological Research ◽

Real Size ◽

Working Parameters ◽

Conditions Of Work

The characteristics of plain bearings used in the industry are given in the article. The directions that increase their ser-vice life are defined. The need for experimental studies of bearing is justified, and laboratory equipment is offered. Experimental study of bearings is necessary to verify calculations and to determine the effect of changing some design parameters on their work as well. It is usually difficult or even impossible to experience the bearing in the real size and under conditions identical to real conditions of work.

Download Full-text

A light optical diffractometer for electron microscopical images operating in line

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107575 ◽

1978 ◽

Vol 36 (1) ◽

pp. 86-87

Author(s):

P. Bonhomme ◽

A. Beorchia

Keyword(s):

Electron Microscopy ◽

Electron Transfer ◽

Electron Microscope ◽

Image Converter ◽

Coherent Light ◽

Spatial Filters ◽

Electron Image ◽

Electron Microscopical ◽

Working Parameters ◽

Amorphous Part

We have already described (1.2.3) a device using a pockel's effect light valve as a microscopical electron image converter. This converter can be read out with incoherent or coherent light. In the last case we can set in line with the converter an optical diffractometer. Now, electron microscopy developments have pointed out different advantages of diffractometry. Indeed diffractogram of an image of a thin amorphous part of a specimen gives information about electron transfer function and a single look at a diffractogram informs on focus, drift, residual astigmatism, and after standardizing, on periods resolved (4.5.6). These informations are obvious from diffractogram but are usualy obtained from a micrograph, so that a correction of electron microscope parameters cannot be realized before recording the micrograph. Diffractometer allows also processing of images by setting spatial filters in diffractogram plane (7) or by reconstruction of Fraunhofer image (8). Using Electrotitus read out with coherent light and fitted to a diffractometer; all these possibilities may be realized in pseudoreal time, so that working parameters may be optimally adjusted before recording a micrograph or before processing an image.

Download Full-text

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

Download Full-text