Mechanics of Wood Machining

Csanády, Etele; Magoss, Endre

doi:10.1007/978-3-642-29955-1

Cited by 52 publications

(41 citation statements)

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“…In the thesis [6][7][8] it is indicated that the hardness of fruit wood depends on its humidity (accuracy up to 1 %) and ambient temperature (the information is given in Table 1). The thickness of the movable blade of the pruner is not more than 2 mm.…”

Section: Fig 2 Interaction Of Blade With Materialsmentioning

confidence: 99%

Electromechanical secateurs based on linear electric motor and determination of cutting force of branches of fruit trees

Антонов

Nikitenko

Grinchenko

et al. 2018

Engineering for Rural Development

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Abstract. Pruning trees is one of the most laborious processes in fruit growing. The level of mechanization, electrification and automation of caring for fruit trees is high, but a number of technological operations are carried out manually. The use of manual labor when pruning tree branches leads to a decrease in the productivity of workers and makes their work ineffective. The use of a manual electrified tool will improve the efficiency of the technology of detailed tree trimming. The existing Russian secateurs have disadvantages that prevent their wide introduction into production. These drawbacks are the use of asynchronous electric motors and an electric current source of increased frequency, large mass and overall dimensions. Foreign analogs of secateurs have improved mass and dimensional indicators, but have a high cost. Taking into account all the mentioned disadvantages, electromechanical secateurs based on a linear electric motor are offered, which have the following set of properties: low power consumption, easy maintenance, high operational reliability, small weight and overall dimensions, high speed. These advantages of the secateurs are achieved by using a linear electric motor. The main advantage of the linear electric drive is the lack of transmission, it is easy to manufacture, reliable in operation and has a high speed. The main parameter for calculating the linear electric motor is the cutting force of the branches. Fruit trees have a certain hardness, which depends on the temperature and humidity of the environment. For successful trimming of fruit tree branches, the optimal combination of the mechanical characteristics of the cutting pair and the linear electric drive is necessary.Keywords: electromotor, secateurs, hacksaw, power, electrotechnology. IntroductionPruning fruit trees is carried out for their formation, control of fruiting and growth, improving crown lighting, rejuvenating, improving the quality of fruits, as well as removing sick, broken and dry branches. Important for the effective development of domestic gardening is the mechanization of the process of detailed pruning of fruit trees, using electrified hand tools.Analysis of existing tools for detailed pruning fruit trees, allowed determining the following types of tools: manual, pneumatic, hydraulic and electric. The cheapest is the hand tool, but the labor costs are much higher than for the rest. Pneumatic tools reduce labor costs for trimming, but they have a number of disadvantages: low reliability of the pneumatic system; short service life; significant reduction in the characteristics of the cut during operation; vibration; limited range of work. Hydraulic tool in comparison with pneumatic, has an extended period of operation and reliability, but it also has characteristic drawbacks. The disadvantages include the danger of malfunctions in the hydraulic system, the complexity of repair in the field, large mass, lack of mobility. The application of the electric drive is most effective according to the analysis of domestic...

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Section: Fig 2 Interaction Of Blade With Materialsmentioning

confidence: 99%

Electromechanical secateurs based on linear electric motor and determination of cutting force of branches of fruit trees

Антонов

Nikitenko

Grinchenko

et al. 2018

Engineering for Rural Development

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“…On the contrary, particles of hardwood species with higher individual strength will be compacted more uniformly as a function of displacement resulting in lower exponent n. Due to the anatomical structure of wood, the individual strength of particles depends not only on wood species but also on the size of particles. With decreasing particle size, the surface-volume ratio increases (Csanády et al, 2013; R.C. Akdeniz et al, 2013).…”

Section: Theoretical Considerations 2 Teorijska Osnovamentioning

confidence: 99%

“…This is also due to the fact that for the construction of Figure 7 and 8, the middle fraction of the three fractions was used and therefore, the points of the other two fractions are placed on the opposite sides of the resultant straight line. The fi nal similarity equation is given in the following form: (4) where the constant C has the value of 3.12 · 10 -5 It should fi nally be noted that in these experiments a plunger with bottom face was used. In practice, however, due to the continuous operation requirements, the chip material is pressed into the boreholes of a die ring and the counter-force is assured by friction forces.…”

Section: Speciesmentioning

confidence: 99%

Study on Energy Requirement of Wood Chip Compaction

Kocsis

Csanády

2015

Drvna ind.

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“…The chip acceleration power P ac variation as a function of mass fl ow and tool velocity is given by: (5) where: m · (kg·s -1 ) represents the mass of wood (chips) evacuated in a certain period of time at the certain cut- 6) where: v f is feed speed and ρ is the density of sawn wood. It should be emphasized, that in these analyses, it was assumed that the power P ac is not a function of the number of working teeth.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Thus, in this case TC = 0.834 cm/m, and for this data middle log diameter is d = 30.66 cm. The latter value was applied in calculations of the total kerf height H Σ as follows (Csanády and Magoss, 2013): (11) where:…”

Section: Materijal I Metodementioning

confidence: 99%