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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: In order to realize the flexible grasping and large-scale stable transfer operation of large mass and large size shaft parts in the process of cross wedge rolling, a new type of cross wedge rolling feeding robot was designed.The robot used six-bar linkage mechanism and four-bar linkage mechanism respectively to realize the lifting movement and horizontal swing of the body, and realized the opening, closing and turning of the clamp based on the tensioning mechanism and rotary joint, so as to complete the transfer of large size shaft parts. Firstly,the 3D virtual prototype of the robot design was carried out according to the schematic diagram of the mechanism movement, combining with the heavy-load grabbing and transport requirements brought by the large-size shaft parts.Then, forward and inverse solutions of the robot kinematics were derived by using D-H parameter method,the motion simulation model of the robot was established with Robotics Toolbox, and the workspace of the robot was delineated based on Monte Carlo regulations.Finally, ADAMS was used to simulate the dynamics of the robot virtual prototype, and the force and torque curves of each driving part and hinge point of the key rod were obtained.The results show that the horizontal movement range of the robot end clamp is -889mm~1172mm, and the longitudinal movement range is 1548mm~2551mm, which proves that the robot end clamp can flexibly grab materials and complete a large range of stable transfer, and provides a solution for the automatic loading of ultra-large axial wedge rolling equipment.
Key words: heavy-duty robot; mechanism design; kinematics analysis; dynamics analysis;flexible grasping;parts transfer; D-H parameter method