tailieunhanh - Báo cáo vật lý: "Performance of Carbide Cutting Tool when Machining Cast Iron FC 250 in Dry Condition and Using Cutting Fluid"

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Performance of Carbide Cutting Tool when Machining Cast Iron FC 250 in Dry Condition and Using Cutting Fluid | Journal of Physical Science Vol. 21 2 67-79 2010 67 Prestasi Mata Alat Karbida Semasa Mengisar Hujung Besi Tuang FC 250 dalam Keadaan Kering dan Menggunakan Bendalir Pemotong Performance of Carbide Cutting Tool when Machining Cast Iron FC 250 in Dry Condition and Using Cutting Fluid Jaharah A. Ghani Mohd Noor Azmi Mohd Rodzi Noordin Ibrahim dan Che Hassan Che Haron Jabatan Kejuruteraan Mekanik dan Bahan Fakulti Kejuruteraan dan Alam Bina Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia Corresponding author jaharah@ Abstract The performance of carbide cutting tool in end milling cast iron FC 250 in dry conditions and when using the cutting fluid has been carried out with emphasis on mechanisms of wear experienced by the cutting edge. In addition the effects of other milling parameters were studied cutting speed m min axial depth of cut mm and feed rate mm tooth . Results indicate failure of the cutting edge is dependent on the parameters mentioned above. In dry machining wear mechanisms were caused by adhesion and micro-attrition at low combination of machining parameters. While at high combination of machining parameters the cutting edge failed due to catastrophic failure such as micro-cracks. Wear mechanisms that occur when milling using cutting fluid were abrasion adhesion and diffusion. Longer tool life was achieved when using cutting fluid . about double compared to dry cutting at the optimum milling conditions. Water-based fluid was found to be better than the high viscosity oil to increase the tool life of the cutting tool. Keywords carbide cutting tools cast iron FC 250 milling wear mechanism Abstrak Prestasi mata alat karbida semasa mengisar hujung besi tuang FC 250 dalam keadaan kering dan menggunakan bendalir pemotong telah dikaji dengan penumpuan kepada mekanisme haus yang dialami oleh mata alat tersebut. Selain itu kesan parameter pemesinan lain turut dikaji iaitu laju pemotongan m min dalam pemotongan axial mm dan kadar .