A constraint-based operation sequencing for a knowledge-based process planning

Pallet operation sequencing based on network part program logic

“…The input MWSs are the extremities of the ordered 6 sub-groups (not considering the fictitious MWSs): 18,1,19,2,20,3,8,23,12,29,34,17. These extremities are respectively renamed 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. The fictitious MWS 0 is added to the MWSs.…”

“…Second, the proposed approach, integrating production planning aspects, copes with actual production conditions according to which it is normal to mount several workpieces and different part types on the same pallet. Indeed, the majority of the examined papers [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] are based on the hypothesis that only one workpiece is loaded on the pallet and the few papers considering more workpieces [29][30][31] seem to be valid only when the number of operations in the analysis is low. Thus, the applicability of these methods becomes strictly limited in opposition to the real production trend that aims to perform hundreds of operations on the same pallet to save the time of tool and pallet changes.…”

Intelligent feature based process planning for five-axis mill-turn parts

“…Therefore, The left-hand features (Process number [17][18][19][20][21][22][23][24][25][26][27][28][29] can use the same processes and the same set of cutting tools after the work in process part is synchronously taken over to the sub-spindle.…”

Automated process planning and cost estimation under material quality uncertainty

“…Tremendous effort has been put into developing an automated process planner as documented in a number of past studies. Those works evolved around feature recognition [12][13][14][15][16][17][18], knowledge representation [19][20][21][22][23][24][25] and inference engine [26,27], and integration of process planning, and upstream or downstream processes [28,29]. Some researchers applied different methods/technologies such as OPPS-PRI 2.0 system [30], genetic algorithms (GA) [31][32][33][34][35][36], imperialist competitive algorithm [37], energy-efficient oriented method [38], neural network-based system [39][40][41], fuzzy set theory/fuzzy logic method [39,42,43], agent-based methodology [44,45], Internet-based technology [46,47], functional blocks [48,49], Petri net model [50] and STEP-compliant method [51][52][53][54], just to name a few, f...…”