The Effect of Tool Edge Preparation of Indexable Carbide Insert

The paper focused on the effect of tool edge preparation of indexable carbide insert on cutting temperature, force and tool wear. The initial wear experiments were carried out to measure flank wear and two criteria to evaluate the effect of tool edge preparation were proposed. The cutting temperature measurement utilized tool-work thermocouple and revealed that the cutting temperature of honed insert was lower. The cutting force measurement with a strain gauge dynamometer showed that tangential cutting force Fz, feed force Fx would be increased and radius force Fy would be decreased after tool edge preparation.

Download Full-text

Influence of tool edge form factor and cutting parameters on milling performance

Advances in Mechanical Engineering ◽

10.1177/16878140211009041 ◽

2021 ◽

Vol 13 (4) ◽

pp. 168781402110090

Author(s):

Xuefeng Zhao ◽

Hao Qin ◽

Zhiguo Feng

Keyword(s):

Form Factor ◽

Simulation Model ◽

Cutting Force ◽

Surface Quality ◽

High Speed ◽

Orthogonal Cutting ◽

Cutting Temperature ◽

Tool Edge ◽

Drag Finishing ◽

Edge Preparation

Tool edge preparation can improve the tool life, as well as cutting performance and machined surface quality, meeting the requirements of high-speed and high-efficiency cutting. In general, prepared tool edges could be divided into symmetric or asymmetric edges. In the present study, the cemented carbide tools were initially edge prepared through drag finishing. The simulation model of the carbide cemented tool milling steel was established through Deform software. Effects of edge form factor, spindle speed, feed per tooth, axial, and radial cutting depth on the cutting force, the tool wear, the cutting temperature, and the surface quality were investigated through the orthogonal cutting simulation. The simulated cutting force results were compared to the results obtained from the orthogonal milling experiment through the dynamometer Kistler, which verified the simulation model correctness. The obtained results provided a basis for edge preparation effect along with high-speed and high effective cutting machining comprehension.

Download Full-text

Instantaneous Cutting Force Variability in Chainsaws

Forests ◽

10.3390/f9100660 ◽

2018 ◽

Vol 9 (10) ◽

pp. 660 ◽

Cited By ~ 2

Author(s):

Adam Maciak ◽

Magda Kubuśka ◽

Tadeusz Moskalik

Keyword(s):

Cutting Force ◽

Rotational Speed ◽

Force Measurement ◽

Timber Harvesting ◽

Test Material ◽

Force Variability ◽

Experimental Stand ◽

Feed Force ◽

Cutting Force Measurement ◽

Force Range

Chainsaws with chipper-type chains are widely used in timber harvesting. While existing research on such saws assumes a continuous cutting process, the objectives of the present study were to determine whether or not that is true, as well as to measure instantaneous cutting forces and active cutting time (the time during which the chainsaw cutters are actually engaged with the wood sample). Tests were conducted on a special experimental stand enabling cutting force measurement with a frequency of 60 kHz. The test material was air-dry pine wood. The feed force range was 51–118 N. The chain was tensioned. The study revealed considerable variability in instantaneous cutting force, which was correlated with the rotational speed of the chainsaw engine, as indicated by frequency analysis. Furthermore, the process of cutting with chainsaws was shown to be discontinuous, and a cutter engagement time ratio was defined as the proportion of active cutting time to the overall time of chainsaw operation when making the cut. It was also found that active cutting time was directly proportionate to the applied feed force and inversely proportionate to the rotational speed of the chainsaw engine. The results may be practically applied to establish an optimum range of rotational speed that should be maintained by the operator to maximize cutting efficiency.

Download Full-text