Analiza konstrukcijskih i radnih veličina lančane sjekačice

Korman, Tomislav; Kujundžić, Trpimir; Klanfar, Mario

doi:10.17794/rgn.2015.1.5

Cited by 3 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A very good correspondence of the speci c cutting energy tested in the laboratory on a linear cutting machine with the eld tests (chain saw) was proved and presented in the PhD thesis by Korman (2014). In other words, the linear cutting machine can be used to simulate the cutting process of the chain saw (Korman at al., 2015b).…”

Section: Introductionmentioning

confidence: 94%

“…A very similar measurement system was used by Korman when studying the in uence of construction and operating parameters on the ef cacy of the chain saw (Korman, 2014) and the in uence of the physical and mechanical characteristics of rocks on energy consumption of the jaw crusher during crushing (Korman et al, 2015a).…”

Section: Measuring System For Measuring Energy Of Cutting or Drillingmentioning

confidence: 99%

“…The three-axis force transducer measuring system was used to measure forces acting on the cutting tool due to the cutting of the rock sample (see Figure 4). A detailed description of transducer design and of the measuring system is given in another work (Korman, 2014). The measurement begins with horizontal levelling and rming of the rock sample and by engaging the electrical motor of the liner cutting machine.…”

Section: Measuring System With Force Transducermentioning

confidence: 99%

“…23-32, DOI: 10.17794/rgn.2018.3.3 values using the calibration matrix, the routines programmed in the Microsoft Excel program (Korman, 2014) have been used. In addition, the same routine is used to calculate the average and maximum value of force and the energy (work) used for cutting a rock sample.…”

Section: Measuring System With Force Transducermentioning

confidence: 99%

See 3 more Smart Citations

Dependency of Specific Energy of Rock Cutting on Specific Drilling Energy

Antoljak¹,

Kuhinek²,

Korman³

et al. 2018

MGPB

Self Cite

View full text Add to dashboard Cite

Speci c energy is the measure which connects the operating parameters of a machine with the characteristics of the rock in which the machine works and is equal to the total work required to break a unit volume of the rock. It is assumed that in machines with the same or similar rock breaking mechanics used for di erent purposes (e.g. cutting and drilling of rocks), there is a signi cant dependence on their speci c energy values. In the exploitation of dimension stone a chain saw and a rotary drill are often used, i.e. the machines for rock cutting or rock drilling whereas their mechanics of rock breaking are very similar. In order to determine the dependence of the speci c energy of rock cutting on the speci c drilling energy, preliminary laboratory tests were carried out on a linear cutting machine and a laboratory drilling rig with simulated cutting of rocks with a chain saw, and drilling by rotary drilling rig. The analysis of the measurement results has provided the guidelines for the continuation of laboratory testing, i.e. eld testing.

show abstract

Section: Introductionmentioning

confidence: 94%

Section: Measuring System For Measuring Energy Of Cutting or Drillingmentioning

confidence: 99%

Section: Measuring System With Force Transducermentioning

confidence: 99%

Section: Measuring System With Force Transducermentioning

confidence: 99%

See 2 more Smart Citations

Dependency of Specific Energy of Rock Cutting on Specific Drilling Energy

Antoljak¹,

Kuhinek²,

Korman³

et al. 2018

MGPB

Self Cite

View full text Add to dashboard Cite

show abstract

“…The obtained data points to the fact that certain chain constructions are more efficient than others in view of the specific energy and the tool wear. The in-situ tests have shown that in the case of using electrical hydraulic saws, the increase of the ratio between the cart speed and the chain speed increases the depth of the cut and reduces the specific cutting energy (Korman et al, 2015a). Hekimoglu (2014) concluded that the specific energy may be reduced by 45% if the length of the cutting sequence is doubled.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2016

MGPB

View full text Add to dashboard Cite

The cutting design of the chain saw is defined by the number, the arrangement and the geometry of the cutting tools. When using chisel cutting tools, the cross sectional area of the cut and the shape of the groove are determined by the width and depth of the cut. The laboratory tests analyzed the impact of the cross sectional area and the shape of the cut on the forces and the specific energy. The testing was performed on a linear cutting machine with tool holders and cutting tools in real-scale size. According to the processed statistical data, increasing the cross sectional area of the cut reduces the specific energy, whereby the width of the cut has a considerably larger impact. The tests have shown that besides the cross sectional area of cut, the shape of the surface also affects the forces and specific energy. Through increasing the width to depth ratio upon a constant cross sectional area of the cut, the value of the specific energy and the cutting forces are reduced. Above the width to depth ratio of 2.5 the cutting forces and the specific energy appear to be constant.

show abstract