Most electrical discharge machining (EDM) machines provide only linear or circular interpolations. To machine a workpiece with a complex geometry, a large number of line segments in terms of G01 codes are used to represent a feeding path in EDM. Periodic jump motions of an electrode are adopted such that the debris concentration in the discharge gap can be reduced and clean dielectric can enter into the discharge gap, thus increasing the effective discharge ratio and improving the machining stability. In the conventional way, the electrode will experience a deceleration to zero, and then an acceleration at junctions connecting two adjacent line segments. To solve this problem, a real-time look-ahead transition algorithm and a motion planning scheme for jump motions with short line segments are proposed. A parametric spline curve is used to blend adjacent short line segments. A transition curve can use the discharge gap as the approximation error tolerance for jump motions in EDM. Analytical calculations for the curvature extrema, real-time performance are also considered in the transition scheme. The motion planning with a look-ahead function for jump motions is developed to obtain a feedrate profile of jump motion. This motion planning scheme includes a path-smoothing, a bidirectional scanning, and a jerk-limited feedrate scheduling. Simulation results show that the velocity profile of the proposed motion planning is smoother. Machining tests for a workpiece with complex curves shows that the proposed method can reduce the machining time by 12.16 % as compared with the traditional method.
The International Journal of Advanced Manufacturing Technology – Springer Journals
Published: Nov 10, 2017
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera