Effect Of Tool Diameter Research Articles

A Model to Determine the Effect of Tool Diameter on the Critical Feed Rate for Ductile-Brittle Transition in Milling Process of Brittle Material

This paper presents analytical and experimental results of ductile-mode machining of brittle material by milling process. In milling process of brittle material, feed per edge is the predominant parameter to achieve ductile-mode machining and hence it limits the permissible material removal rate. An analytical model has been proposed to evaluate the effect of tool diameter on the critical feed per edge for ductile-brittle transition in milling process of brittle material. The proposed model has been validated experimentally by performing microcutting tests on tungsten carbide workpiece by milling process. It has been established by the model and the experimental results that an end-mill of larger diameter improves the critical feed per edge for ductile-brittle transition in milling process of brittle material.

EFFECT OF TOOL SHOULDER DIAMETER ON THE MECHANICAL PROPERTIES OF 1200 ALUMINUM FRICTION STIR SPOT WELDING

A friction stir spot welding (FSSW) process is an emerging solid state joining process in which the material that is being welded does not melt. In this investigation an attempt has been made to understand the effect of tool shoulder diameter on the mechanical properties of the joint. For this purpose four welding tools diameter (10,13, 16 and 19) mm at constant preheating time and plunging time were used to carryout welding process. Effect of tool diameter on mechanical properties of welded joints was investigated using shear stress test and Microhardness of joint which welded was studied. Based on the stir welding experiments conducted in this study the results show that aluminum alloy (1200) can be welded using (FSSW) process with maximum welding efficiency (80%) shear strength using tool diameter(19mm) with rotation speed (900rpm).

144 アルミニウム合金摩擦スポット接合継手の機械的性質に及ぼす工具径の影響(溶接・接合のプロセスと評価)

144 アルミニウム合金摩擦スポット接合継手の機械的性質に及ぼす工具径の影響(溶接・接合のプロセスと評価)

A study on the precision machinability of ball end milling by cutting speed optimization

This study proposes an optimization cutting speed program developed to improve the machining precision and tool life in high speed machining using the ball end mill. This program optimizes the cutting speed that varies during free surface machining. As for the technique of optimization cutting speed, the NC code generated from CAD/CAM goes through a reverse post process and cutting simulation and the effective tool diameter of the ball end mill is obtained. Then the range of critical cutting speed suitable for the workpiece is selected and the spindle revolution is changed according to the effective tool diameter within the range of the critical cutting speed. In this paper, the machining precision and tool life were compared in the free surface machining conducted by the general cutting method and the technique of optimization cutting speed.

Relationship between machinability additives and machining parameters

This study proposes an optimization cutting speed program developed to improve the machining precision and tool life in high speed machining using the ball end mill. This program optimizes the cutting speed that varies during free surface machining. As for the technique of optimization cutting speed, the NC code generated from CAD/CAM goes through a reverse post process and cutting simulation and the effective tool diameter of the ball end mill is obtained. Then the range of critical cutting speed suitable for the workpiece is selected and the spindle revolution is changed according to the effective tool diameter within the range of the critical cutting speed. In this paper, the machining precision and tool life were compared in the free surface machining conducted by the general cutting method and the technique of optimization cutting speed.