Vector modeling of robotic helical milling hole movement and theoretical analysis on roughness of hole surface

Abstract

To avoid the machine problems of excessive axial force, complex process flow and frequent tool changing during robotic drilling holes, a new hole-making technology (i.e., helical milling hole) was introduced for designing a new robotic helical milling hole system, which could further improve robotic hole-making ability in airplane digital assembly. After analysis on the characteristics of helical milling hole, advantages and limitations of two typical robotic helical milling hole systems were summarized. Then, vector model of helical milling hole movement was built on vector analysis method. Finally, surface roughness calculation formula was deduced according to the movement principle of helical milling hole, then the influence of main technological parameters on surface roughness was analyzed. Analysis shows that theoretical surface roughness of hole becomes poor with the increase of tool speed ratio and revolution radius. Meanwhile, the roughness decreases according to the increase of tool teeth number. The research contributes greatly to the construction of roughness prediction model in helical milling hole.

Keywords

helical milling hole / robotic hole-making system / vector modeling / theoretical surface roughness

References

[1] JiangC-y, WangJ-biao. Key manufacturing technologies of large aircraft development in China [J]. Aeronautical Manufacturing Technology, 200928-31

[2] PoY, XuG-k, XiaoQ-dong. Automatic precision drilling technology of aircraft structural part [J]. Aeronautical Manufacturing Technology, 2009, 24: 61-64

[3] DuB-r, FengZ-m, YaoY-b, BiS-sheng. Robot drilling system for automatic drilling of aircraft component [J]. Aeronautical Manufacturing Technology, 201047-50

[4] KeY-l, YangW-d, YaoB-g, DongH-yueSystem and method of cutting and machining base on robot for aircraft assemble: CN, 200810121353.1 [P], 2008

[5] HeN, LiL, ShanY-c, YangY-feiAutomatic wing-body docking hole-making system and method: CN101804470B [P], 2012

[6] ZhouW-y, ZhouF, XueG-j, GanL, DuB-rui. Research on automatic drill with five axes for flexible assembly of aircraft wing components [J]. Aeronautical Manufacturing Technology, 201044-46

[7] LiangJ, BiS-sheng. Effects of drill end effector’s mounted method on the robot performance [J]. Journal of Mechanical Engineering, 2010, 46(21): 13-18

[8] DenkenaB, BoehnkeD, DegeJ H. Helical milling of CFRP-titanium layer compounds [J]. CIRP Journal of Manufacturing Science and Technology, 2008, 1(2): 64-69

[9] IyerR, KoshyP, NgE. Helical milling: An enabling technology for hard machining precision holes in AISI D2 tool steel [J]. International Journal of Machine Tool & Manufacture, 2007, 47: 205-210

[10] WhinnemE. Development and deployment of orbital drilling at Boeing [C]. Aerospace Automated Fastening Conference and Exposition. Toulouse, France, 2006

[11] WhinnemE, LipczynskiG. Development of orbital drilling for the Boeing 787 [J]. SAE International Journal of Aerospace, 2009, 1(1): 811-816

[12] MarguetB, WiegertF, LebaharO, BretagnolB, OkcuF. Ericsson Ingvar. Advanced portable orbital-drilling unit for airbus final assembly lines [C]. Aerospace Automated Fastening Conference and Exposition, 2007

[13] NiW-yang. Orbital drilling of aerospace materials [C]. Aero Tech Congress and Exhibition, 2007

[14] BrinkmeierE, FangmannS, MeyerI. Orbital drilling kinematics [J]. Production Engineering (WGP), 2008, 2(1): 277-283

[15] ShanY-c, HeN, LiL, ZhaoW, FangWei. Spindle’s prompt normal posture alignment method for assembly hole-making on large suspended panel [J]. Mechanical Science and Technology for Aerospace Engineering, 2011, 11: 1844-1849