Tag Archives: Agricultural machinery

301–333 P. Borkar , C. Sakhale, R. Tupkar and S. Shelare
Mechanisation and automation trends in modern threshing systems: from stand-alone machines to intelligent combine harvesting technologies
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Mechanisation and automation trends in modern threshing systems: from stand-alone machines to intelligent combine harvesting technologies

P. Borkar¹ , C. Sakhale², R. Tupkar¹ and S. Shelare¹³*

¹ Department of Mechanical Engineering, Priyadarshini College of Engineering,
Nagpur- 440019, Maharashtra, India
²Department of Aeronautical Engineering, Priyadarshini College of Engineering, Nagpur- 440019, Maharashtra, India
³Centre for Research Impact and Outcome, Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, 140401, Punjab, India
*Correspondence: sagmech24@gmail.com

Abstract:

The mechanical harvesting process commonly known as threshing effects the grain quality, yield recovery, and agricultural profitability. To meet rising global food demands due to population growth along with labour shortages there is a need for efficient and automated threshing systems capable of producing high yields with low loss. This paper will provide a summary of recent advancements in threshing technology and evaluate its overall performance based upon criteria such as: efficiency; ability to accommodate different crops; and level of technology utilised in its design. The classification system used to classify threshing equipment into categories included those related to type of threshing mechanism (drum type, concave type, axial flow type); source of power (electricity, gasoline, diesel, hydraulic fluid, etc.), and type of equipment (single crop, multiple crops, and combine). Previous experimental studies reported that modern threshing systems can achieve high threshing and cleaning efficiencies depending on crop type, machine configuration, and operating parameters. High-capacity axial-flow systems have demonstrated productivity values up to 543 kg h⁻¹ in reported studies, whereas smaller solar- and pedal-operated threshers provide suitable alternatives for smallholder farming systems where affordability and portability are important considerations.

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261–269 M. Pütt and M. Madissoo
CNC drilling of wear-resistant Hardox 450 steel using HSSCo solid drills with variable feed rates
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CNC drilling of wear-resistant Hardox 450 steel using HSSCo solid drills with variable feed rates

M. Pütt* and M. Madissoo

Estonian University of Life Sciences, Institute of Forestry and Engineering, Biosystems Engineering, 56 Kreutzwaldi Str., EE 51006 Tartu, Estonia
*Correspondence: Maicel.pytt@gmail.com

Abstract:

Wear-resistant martensitic plates are widely used in agricultural machinery but are difficult to drill during fabrication and repair. This study compared constant-feed and
depth-adaptive CNC drilling of 12 mm Hardox 450 using cost-effective 8 mm HSS-Co twist drills under flood cooling. Axial force was recorded in real time using a Kistler piezoelectric dynamometer and interpreted together with repeated-hole behaviour, tool-edge condition, and chip morphology. Under constant-feed drilling at Vc = 20 m min⁻¹, the maximum axial force increased from approximately 980 N in the first hole to 2130 N in the third hole.

Under the depth-adaptive feed condition at the same cutting speed, peak axial force remained at approximately 900–910 N across the three-hole sequence and was associated with a smoother breakthrough response, less visible edge deterioration, and more regular chip morphology. Within the limits of this short-run feasibility study, the results suggest that breakthrough-oriented feed reduction may reduce drilling load and support more stable breakthrough behaviour without changing the tool type or machine platform.

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604-614 T. Yezekyan, F. Marinello, G. Armentano and L. Sartori
Analysis of cost and performances of agricultural machinery: reference model for sprayers
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Analysis of cost and performances of agricultural machinery: reference model for sprayers

T. Yezekyan¹*, F. Marinello¹, G. Armentano² and L. Sartori¹

¹University of Padova, Department of Land, Environment, Agriculture and Forestry, Via dell'Università 16, IT35020, Legnaro, Italy
²Edizioni L'Informatore Agrario srl, Via Bencivenga - Biondani, 16, IT37133 Verona, Italy
*Correspondence: tatevik.yezekyan@phd.unipd.it

Abstract:

Management of agricultural operations is currently rapidly changing caused by increased attention to the concepts of sustainable development and sustainable intensification. Enhancement of productivity and efficiency of agricultural machinery are the leading factors in sustainable agriculture. The complete application and exploitation of engineering advances require the revision of traditional agricultural machinery management process. The definition of the farm fleet (tractors and implements), as well as machinery planning and management, must consider different parameters, including not only the cost of the machines but also their dimensions, weight, working width, needed power, etc. All of this information related to an agricultural machine is eventually influencing the impact on productivity, on the return on the investment, and also on the environment.
The present work is aimed at identifying the most relevant parameters which are influencing costs and performances of sprayers, including tank volume, maximum flow, needed power, weight and price. The different parameters are analysed in a correlation matrix, in order to allow identification of dependencies and to extract reference models.
The study is based on linear and multiple linear regression analysis carried out on technical specifications of about 700 models of sprayers. Relevant correlations were highlighted between price and weight, between weight and tank capacity and in some cases between power and weight. Following such correlations, models have been proposed, which can be implemented in order to support the decision making phases.

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68-73 M. Heinloo and J. Olt
A Novel Manipulator for a Stone Protector of Stony Soil Tillage Implement
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A Novel Manipulator for a Stone Protector of Stony Soil Tillage Implement

M. Heinloo and J. Olt

Estonian University of Life Sciences, 56 Kreutzwaldi Str., EE51014 Tartu, Estonia
e-mail: Mati.Heinloo@emu.ee; Jyri.Olt@emu.ee

Abstract:

This paper studies a novel manipulator for a stone protector of stony soil tillage implement. According to the virtual reality technology based method, the composition technology of the virtual model of the novel manipulator is described in detail. This virtual model is used for the compilation of a video clip which simulates the motion of the model. The obtained results and a special computer program, realizing the virtual reality technology based study of the working process of the novel manipulator, can be useful for real time manipulator designers.

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