Surface roughness and chip morphology of wood-plastic composites manufactured via high-speed milling

Wei, Weihua; Cong, Rui; Xue, Tongming; Abraham, Ayodele Daniel; Yang, Chuanfang

doi:10.15376/biores.16.3.5733-5745

Cited by 10 publications

(7 citation statements)

References 17 publications

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“…These observations were in line with previous studies conducted by Y.Dong [10]. The morphology of the wood chips produced by the milling process is consistent with the milling results of Wei [19]. The procedure for establishing the equations of the chip boundary surface is explained in the subsequent section.…”

Section: Modeling Of Chip Boundary Surface F(xy)supporting

confidence: 90%

“…Substitute Equation ( 16) into Equation (19) to eliminate time t. The result is shown in Equation ( 20):…”

Section: Modeling Of Chip Boundary Surface F (Xy)mentioning

confidence: 99%

“…The overall regression of the model is considered to be highly significant, with a p-value less than 0.0001. The f-value of19.74 indicates that the probability of the model being influenced solely by noise is only 0.01. All variables included in the table are significant, with p < 0.05 indicating high significance, 0.1 < p < 0.05 indicating significance, and p > 0.1 signifying insignificance.…”

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confidence: 99%

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Study of the Movement of Chips during Pine Wood Milling

Yang

Liu

et al. 2023

Forests

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Circumferential milling is used in wood processing, yet it generates vast quantities of dust and chips in a single pass, highlighting the need to predict chip dispersion and prevent associated hazards. This article presents findings from a theoretical and experimental analysis of chip size and kinematics of pine wood during cutting. A chip diffusion boundary surface model was established and its key parameters were determined through CCD testing. Results reveal that chip diffusion can be divided into three distinct areas based on motion state: main diffusion, random diffusion, and vortex. Notably, spindle speed and feed rate are most influential on the orthogonal diffusion angle of the main diffusion zone, whereas cutting depth most heavily impacts the top view diffusion angle. Chip scattering on the table showed an exponential increase in average chip size with sampling distance, whereas the boundary surface model accurately characterizes chip motion and demonstrates a reasonable degree of reliability, offering potential in predicting chip morphology and diffusion state. This model has important implications for wood milling practices, particularly in controlling chip dispersion.

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Section: Modeling Of Chip Boundary Surface F(xy)supporting

confidence: 90%

“…Substitute Equation ( 16) into Equation (19) to eliminate time t. The result is shown in Equation ( 20):…”

Section: Modeling Of Chip Boundary Surface F (Xy)mentioning

confidence: 99%

mentioning

confidence: 99%

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Study of the Movement of Chips during Pine Wood Milling

Yang

Liu

et al. 2023

Forests

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“…Roughness parameters, such as Ra, grow linearly with the increase in feed speed (Atanasov et al 2023a;Smajic and Jovanovic, 2020;. By (Pinkowski et al 2018a) as the feed speed increases, so does the thickness of the chip, and more material is also cut off (Wei et al 2021). With an increase in feed speed, the feed per tooth increases in direct proportion, which significantly worsens conditions below the cutting-edge zone and causes cracks.…”

Section: Introductionmentioning

confidence: 99%

11th Hardwood Conference Proceedings

2024

Hardwood Conference Proceedings

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Black locust (Robinia pseudoacacia L.) is the most widespread non-native tree species in Europe and has had a significant impact on the Central European landscape and forestry. The black locust has many exceptional characteristics that represent considerable potential for use by man. The climate shift in recent decades in Central Europe could further strengthen the importance of this tree species. However, there are also risks arising from the invasiveness of the black locust. Like Hungary, Czechia has had many years of experience with this tree species. Still, the current approach between these two countries, particularly in conventional forestry, differs. This paper attempts to summarise how the management of Robinia and its stands is viewed in Czechia, where the common forestry utilization of black locust is currently not considered due to its invasiveness. The reason for a more reserved forestry attitude in Czechia can be associated with the relatively frequent stem deformities of Robinia stands, which are often attributed to frost. However, the frost deformities and low stem-form quality of some Robinia stands do not affect their vigour and potential to invade adjacent habitats. It often takes considerable effort to remove black locust, especially where the spreading of Robinia threatens valuable adjacent ecosystems. On the other hand, there is great potential for the use of Robinia in Czechia. It can be found in controlled energy crops, fast-growing plantations (lignicultures), some land reclamation projects or urban greenery. Robinia can also be grown in small stands or in groups of trees surrounded by arable land that does not allow the tree to spontaneously spread. Regarding the production plantations of Robinia, the Hungarian experience and breeding program can be very inspiring for Czechia. Generally, there is a move towards 'site-specific management', but with a strong emphasis on the precautionary principle. Finding and then consistently applying a balanced approach to black locust management that not only allows for the potential but also respects the risks of Robiniait is currently a key challenge for Czech forestry, landscape and nature conservation.

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“…1. The positioning label, which is installed on the electric micro-tiller, is powered by the USB/5V interface (Wei et al, 2021a). The positioning base station is arranged at a fixed indoor location, generally divided into master and slave base stations.…”

Section: Introductionmentioning

confidence: 99%

Design and test of a positioning system for a greenhouse electric micro-tiller based on ultra-wideband

et al. 2022

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Abstract. A positioning system for ultra-wideband (UWB) electric micro-tillers suitable for complex greenhouse environments was designed as the basis for realizing unmanned micro-tillers to address the problem of the frequent safety accidents of existing micro-tillers. First, the positioning base station and tag were designed on the basis of the STM32 and DW1000 chip hardware. The real-time coordinate display of the micro-tiller in the greenhouse could also be realized with the design of the upper computer software. Then, the realization method of the positioning function, including the analysis of time difference of arrival (TDOA) and two-way ranging (TWR) positioning methods, and the selection of the best Taylor positioning algorithm through a MATLAB simulation were studied to reduce the influence of noise and measurement errors on measurement accuracy. Finally, a positioning system accuracy test was conducted. Test results revealed that the maximum positioning error of the micro-tiller positioning system is no more than 6 cm, and the average error is 4.4 cm. The optimized positioning error is reduced by 10.2 %, considering that the influence of the base station location on the accuracy. The positioning system of the greenhouse electric micro-tiller designed in this paper demonstrates a stable performance and positioning accuracy to meet the needs of greenhouse rotary tillage operations. This system has certain theoretical importance and reference value for the development of precise positioning technology for working tools in the greenhouse and the further realization of unmanned rotary tillage operations.

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Surface roughness and chip morphology of wood-plastic composites manufactured via high-speed milling

Cited by 10 publications

References 17 publications

Study of the Movement of Chips during Pine Wood Milling

Study of the Movement of Chips during Pine Wood Milling

11th Hardwood Conference Proceedings

Design and test of a positioning system for a greenhouse electric micro-tiller based on ultra-wideband

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