Modeling of Drilling Forces Based on Twist Drill Point Angles Using Multigene Genetic Programming

Table 1

Measured values of drill point angles.

Number	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20
rd	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
	7	8	9	12	12	15	16	16	16	19	23	31	33	34	34	37	37	38	44	50
	54	53	67	73	51	61	53	55	57	65	40	41	60	36	43	45	49	39	55	48
	59	59	59	59	59	59	59	59	59	59	59	59	59	59	59	59	59	59	59	59