Page 17 - Станочный парк английская версия
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METALWORKING EQUIPMENT AND TOOLS
Fig. 3. An example of assembly BBT:
1 - shank, 2 - holder, 3 - adapter, 4 - mandrel, 5 -
cutter, 6 - key for the end interference.
The machined surfaces of the holes
with a diameter of 46 mm in the parts
made of steel 45 were controlled using the
equipment of the metrological laboratory
of the State Engineering Center. The size
of the machined holes, the roughness and
Fig. 2. The device axial interference at the ends of the
BBT blocks. deviations of the shape of the holes in
For the calculated value of the force the cross and longitudinal sections were
Q1, tgα = 1.15, the corresponding angle α checked.
= 49 °. Since we considered the limitation A comparison of the results showed
of the disclosure of the junction of the that the developed BBT satisfies the
modules to a minimum, the angle 2α can be conditions of roughing and semi-finishing of
taken in a smaller direction, for example, the holes with the ratio of the extension of
along the normal series of angles 2α = 90 °. the boring mandrel to the diameter of the
The technical documentation was hole within the range from 3.5 to 6.
developed on the design of the BBT The expected economic effect of using
assembly blocks, according to which an the development in one flexible production
experimental batch of the boring tool kit of two multi-purpose machines is at least
was manufactured at the Orsha Tool Plant. 25,000 rubles a year due to a significant
An example of BBT assembly is shown in reduction in the cost of manufacturing
Fig. 3. special boring mandrels when updating
The manufactured blocks and production facilities, reducing the cost of
assembled kits were tested in the laboratory storing the tool and preparing it for work.
of technology for cutting materials at a The development was carried out in
technological training ground and in the the course of implementation of the state
laboratory of the "Machine Tools" department contract of July 11, 2014 No. 9.1557. 2014
of MSTU "STANKIN". Comparison of / K between the Ministry of Education and
assembled kits with prototype of their Science of the Russian Federation and
analogues without joints was carried out. the FSBEI HE "MSTU" STANKIN "and is
Before boring, sets and analogs assembled protected by the utility model patent No.
from blocks were adjusted to a processing 159238 of August 11, 2015 and the priority
radius of 23.00 mm on a BORLETTI device application for the boring tool utility model
(Italy) with an accuracy of 0.02 mm. No. 2016105789 dated 19.02.2016.
Stanochniy park 17
