WEAR CHARACTERISTICS OF WOOD CUTTING TOOLS CAUSED BY EXTRACTIVE AND ABRASIVE MATERIALS IN SOME TROPICAL WOODS

Tropical woods and wood-based materials are processed in large and increasing quantities in many countries for building constructions and decorative purposes. In the secondary wood manufacturing industry, where wood and wood-based materials are machined extensively, tool wear becomes an important ec...

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Bibliographic Details
Published in:Journal of tropical forest science 2011-07, Vol.23 (3), p.345-353
Main Authors: Darmawan, W, Rahayu, I, Nandika, D, Marchal, R
Format: Article
Language:English
Subjects:
Corrosion
Cutting tools
Forestry
Material properties
Materials
Steels
Timber
Tropical forests
Tungsten carbides
Weight loss
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Summary:Tropical woods and wood-based materials are processed in large and increasing quantities in many countries for building constructions and decorative purposes. In the secondary wood manufacturing industry, where wood and wood-based materials are machined extensively, tool wear becomes an important economic parameter. Therefore, investigating the machining characteristics of the wood and wood-based materials will lead to making better choices of cutting tool materials used to cut them. For many wood cutting processes, the interest in high speed tool steels and tungsten carbides remains very important because of their good tool edge accuracy and easy grinding. This paper presents the wear characteristics of SKH51 high speed steel and K10 tungsten carbide caused by extractive and abrasive materials present in Indonesian tropical timbers of mersawa, oil palm, white meranti, damar laut and ulin. Experimental results showed that extractive and silica contained in the woods affected wearing of both cutting tools. Mersawa contained an extractive that was the most corrosive to the cutting tools. Mersawa and oil palm, which are also high in silica content, caused severe damages to the cutting edge of the SKH51 high speed steel. However, K10 tungsten carbide tool retained high wear resistance in cutting the tested woods. Kayu tropika dan bahan berasaskan kayu diproses dalam kuantiti yang besar dan semakin meningkat di banyak negara bagi tujuan pembinaan bangunan serta hiasan. Dalam industri penghasilan kayu sekunder, kayu dan bahan berasaskan kayu dimesin dengan banyak. Justeru hausan perkakas merupakan parameter ekonomi yang penting. Kajian tentang ciri pemesinan dapat membantu dalam pemilihan bahan yang digunakan untuk perkakas potong. Proses pemotongan kayu banyak menggunakan keluli perkakas tahan lasak dan tungsten karbida kerana ketepatan mata perkakas yang baik serta mudah untuk dicanai. Artikel ini melaporkan ciri kehausan keluli tahan lasak SKH51 dan tungsten karbida K10 yang disebabkan oleh bahan-bahan ekstraktif serta pelelas yang wujud dalam kayu tropika di Indonesia iaitu mersawa, kelapa sawit, meranti putih, damar laut and ulin. Keputusan kajian menunjukkan bahawa bahan esktraktif dan silika dalam kayu mempengaruhi hausan kedua-dua perkakas potong yang diuji. Mersawa mengandungi ekstraktif yang paling kuat mengkakis perkakas potong. Mersawa dan kelapa sawit yang mempunyai kandungan silika yang tinggi mengakibatkan kerosakan teruk pada mata pemotong keluli
ISSN:0128-1283
2521-9847