11 / 13
Применение ориентированных гиперграфов ограничений при проектировании…
Инженерный журнал: наука и инновации
# 5 2016
11
Application of oriented constraint hypergraphs
in designing manufacturing technology precision structure
P.V. Kruglov, I.A. Bolotina
Bauman Moscow State Technical University, Moscow, 105005, Russia
When designing the assembly processes of engineering products one of the tasks is to
select a sequence of product assembly (assembly route), which is influenced by the re-
quirements for inspection and testing, the availability of standard processes, regulated
sequence of certain operations. In terms of design process automation, multi-variance of
assembly technology is the problem. In addition, in precision structure assembling it is
necessary to take into account the geometry of the components, methods of connection
and patterns of individual surfaces conjugation. To reduce the manual labor in the de-
sign of technology it is necessary to create a system of computer-aided design for tech-
nology of high-precision structure assembling. To develop such a system it is proposed to
use the design algorithm of technological assembly processes based on oriented con-
straint hypergraphs describing variants of part combinations, making impossible subse-
quent assembling other components. When using this algorithm the pairs of conjugated
parts are considered alternately and those parts which cannot be installed in the assem-
bly unit in assembling the pairs are indicated as restrictions. Constraint hypergraph de-
scription can be presented both in graphical and tabular form.
Variants of processes not contradicting with the constraints for a given assembly unit are
calculated on the basis of the constraint hypergraph. This approach can significantly
reduce the number of assembly options under consideration and offer the technology
developer a list of options, ranked according to certain criteria or the value of the objec-
tive function.
This algorithm has been tested in the development of assembly technology for high-
precision shaped charge. It reduced the number of considered technology options from
more than 5000 to 32. It is proposed to consider the possibility of progressive assembly
taking into account production section turnover as a criterion of assembly option selec-
tion.
Keywords:
sequence of assembly, assembly technology, constraint hypergraph.
REFERENCES
[1] Korsakov V.S., Kapustin N.M., Tempelgof
K.Kh., et al.
Avtomatizatsiya proek-
tirovaniya tekhnologicheskikh protsessov v mashinostroenii
[Computer Aided
Design of Technological Processes in Mechanical Engineering]. Moscow,
Mashinostroenie Publ., 1985, 304 p.
[2] Pavlov V.V.
Nekotorye ocobennosti ASTPP v proizvodstve slozhnykh izdeliy.
Avtomatizatsiya tekhnologicheskoy podgotovki na osnove ESTPP
[Some Fea-
tures of the Automated System for Technological Preparation of Production in
Manufacturing Complex Products. Automation of Technological Preparation
Based on Unified System of Technological Preparation of Production]. Moscow,
Standart Publ., 1976, p. 152.
[3] Ershov V.I., Pavlov V.V., et al.
Tekhnologiya sborki samoletov
[Technology of
Aircraft Assembling]. Moscow, Nauka Publ., 1986, 456 p.