Innovative Design and Machining Verification of a Dual Axis Swivel Table for a Milling Machine
			
	
 
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				1
				Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan, R.O.C.
				 
			 
						
				2
				Graduate Institute of Precision Manufacturing, National Chin-Yi University of Technology, Taichung 41170, Taiwan, R.O.C.
				 
			 
						
				3
				Green Technology Division, ITRI Central Region Campus, Industrial Technology Research Institute, Nantou 540, Taiwan, R.O.C.
				 
			 
										
				
				
			
			These authors had equal contribution to this work
			 
		 		
				
		
		 
			
			
		
		
		
		
		
		
	
							
																									    		
    			 
    			
    				    					Corresponding author
    					    				    				
    					Jui-Pin  Hung   
    					Graduate Institute of Precision Manufacturing, National Chin-Yi University of Technology
    				
 
    			
				 
    			 
    		 		
			
							 
		
	 
		
 
 
Adv. Sci. Technol. Res. J. 2024; 18(1):306-319
		
 
 
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ABSTRACT
This study was aimed to develop a dual-axis rotary table for small and medium-sized five-axis milling machines. The rotation and tilting axis of swivel table were respectively driven by servo motor with gear reducer to achieve low speed, high torque, high rigidity and high precision machining capability. Essentially, the dynamic interaction between the work piece and the tool in the cutting process is an important factor that affects the machining performance, which also implies that the structural characteristics of the rotary table with the swiveling angle will affect the cutting performance of the five-axis machine. Therefore, at the design stage of a five-axis machine tool, it is a prerequisite to evaluate change of dynamic characteristics of the rotary module within the desired feeding range. To this purpose, this study employed the finite element method to analyze the dynamic characteristics of the rotary table under different configurations. In order to evaluate the application feasibility of the dual axis module on a milling machine, ISO S-shaped machining tests were carried out. Meanwhile, considering the influence of machining vibration on the surface quality of the work piece, the vibration induced at spindle tool and rotary table were assessed for comparisons and used to evaluate the variation of machining vibration with the milling cycles. Based on various experimental results, it is confirmed that the proposed dual-axis rotary table has good structural dynamic characteristics with stable vibration features during a small batch production tests. Current results clearly demonstrate the potential and capability of the proposed dual axis rotary table in practical application and commercialization.