Байланысты: Мехатроника 1 том Баймухамедов М.Ф., Джаманбалин Қ.Қ.,Ақгул м.К.
4.7.3 Final assembly drawing The peculiarity of this stage in its duality: on the one hand, a final drawing
of the final layout (a general view or an assembly drawing) is finished, the result
225 of the long-time work done previously is summed up; on the other hand, it’s
not just a drawing, it’s a design that starts from the very beginning, from the
very first line and ends with the creation of a drawing that almost completely
provides the stage of detailing.
Starting the final drawing of the final layout, the designer decides to refuse
further searches, from comparison and selection of options.At the same time,
the entire drawing technique should leave the designer with maximum freedom
of variation throughout the course of the work. The need for current changes in
the design being created makes it necessary to draw the drawing in two steps:
in thin lines, followed by their stroke.
At first, it is possible to exclude design elements from the graphic work on
the final layout drawing. If you transfer a sketch layout drawing to the sheet
without large changes, we get a kind of «skeleton» – the basis for the drawing
of the future design of the mechatronic module. The skeleton of the drawing is
constructed in several projections. If the sketch layout is rendered unsuitable for
such a construction, then this is evidence of its underdevelopment. The sequence
of drawing the final composition of the skeleton elements in the drawing
basically coincides with the sequence of application of the same elements in the
sketch layout drawing.The unsuccessful selection of the sequence of drawing
the elements of the skeleton of the final layout layout can make itself felt later
and createconsiderable difficulties in the detailed constructive implementation
of a particular node.
The complexity, the many-part nature, the operation of the criteria for mini-
mizing the mass-dimensions parameters, reliability criteria-all these factors
require a strict sequence of a final drawing of the final layout.
After drawing the skeleton of the drawing, the designer gets the opportunity
to concentrate his efforts on the specific development of individual units and
details. At design development of units and details not only the correctness of
assumptions accepted at the previous stages is checked, but layout errors are
also corrected to some extent.
Detailing of assemblies and parts must be conducted from the middle part
to the periphery in order to avoid «looseness» or excessive compression in
radial directions. To put on the sheet elements that are uniquely determined in
form and location in order to take advantage of the restrictions they impose,
and also not to postpone the last stage the development of units and parts with
undetected dimensions in order to be able to compensate for the increase in
their dimensions in due time by compacting neighboring ones.
The reduction in the number of parts in the mechatronic module is often
achieved due to the complication of the character of the motion of the links.
The simplest example is a planetary gearbox. At the cost of complicating the
226 nature of the motion of the planetary wheel, it is possible to reduce the number
of toothedpairs (compared to a conventional gear reducer).
It should be noted that the issues related to the methods of manufacturing