Effect of metallurgical parameters on the drilling and tapping characteristics of aluminum cast alloys
作者： H. Barakat , Y. Zedan , A. M. Samuel , H. W. Doty , S. Valtierra
DOI: 10.1007/S00170-019-04322-9
关键词:
摘要: The present study was performed on an Al-6% Cu-0.7%Si alloy, and 319 356 alloys following different heat treatments. main task to evaluate the drilling tapping characteristics of Al-Cu alloy with respect Al-Si-based alloys. work carried out a Huron K2X8five CNC machine at 15,000 rpm continuous cooling absorb clean holes from chips formed during operation. results show that addition Si coupled T6 aging treatment produces highest cutting forces (about 360 N) among studied (approximately 270 N) after 2500 holes. Considering Al-Cu-based alloys, varying has practically no significant bearing forces. Apparently, high Cu content acts as self-lubricant, facilitating process up 2700 holes, sign tool wear. However, due low level in built edge (BUE) is more frequent, conical chips, which would affect precision size drilled hole. are normally dull characterized by their rough surfaces compared those obtained A356.0 alloy. Tapping using Guhring 971 H6 M6 6HX- HSSE taps. HT200-based revealed excellent machinability wearing In contrast, failed 1600 case 2160 for Thus, it concluded presence 3.5% helped reducing severity eutectic particles. reached 120 N prior failure about 75 N T200-based
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