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NEWS METALWORKING EQUIPMENT
AND TOOLS
Stages of lifting restrictions in Russian regions Directions for the development of elopment of
Directions for the dev

gear processing equipment
gear processing equipment
Rospotrebnadzor published recommendations to remove restrictions imposed due to the
spread of the new coronavirus. The agency proposed a three-stage scheme, which is based
on three main indicators - the spread of infection, free bed capacity and coverage of the
population with testing. What should be the values of these indicators in order for the abolition The most important directions of the
of restrictions to begin, as well as what they will open and allow at each stage - in the Ria.ru development of gear processing machines
infographic at the current stage of development of
drive technology are considered. The main
design features of the characteristic units
of two scales (vertical and horizontal) gear
hobbing machines with direct drives of
rotation of the tool and the workpiece are
shown.

Despite the limited technological capabilities, Therefore, gaps in the gears are
gearing the equipment is quite expensive since eliminated and high rigidity is ensured
machines are specialized to perform a specific
technological operation. The surfaces obtained on when transmitting rotation from the engine
to the workpiece and tool. This solution
them, in most cases are not feasible on machines allows not to use precise dividing gears
of other types, so they can be the cause of (for rotating the workpiece or tool), which
bottlenecks in production. In this regard, gear have a decisive influence on the kinematic
processing equipment has been in operation for a
long time and requires periodic modernization. accuracy of the machine, which with direct
drives is determined by feedback sensors
The modernization of machines in most and changes little during operation, unlike
cases has the goal of increasing (or restoring) the scheme with intermediate gears. A
kinematic accuracy, expanding technological number of advantages appear, including
capabilities, replacing the main components with
more modern ones, improving service conditions hardening the design of machines (there
are no complex components with kinematic
and requires serious changes in the design. chains), increasing technological reliability
The most common direction of modernization (longer preserving kinematic accuracy), a
of gear hobbing and gear shaping machines is the wider level of unification between machines
replacement of the mechanical forming kinematic
chains of the drive for rotating the tool and the of different sizes (both constructive and
production).
workpiece with electric circuits, the connection In the Russian Federation, several
between which is realized using the CNC system models of gear hobbing machines with direct
(or programmable controllers). This is due to drives have been produced, which have
the lowest possible cost of modernization with a
sufficiently high efficiency. been intensively operated for a number of
years (in particular, 4 machines of 5M370F4
In this case, the drive motors of the tool model from Morena, Kolomna).
and the workpiece are not installed on the final Some features of the construction of
links (as when using direct drives), but transmit gear hobbing machines with direct drives
the rotation through intermediate gears - worm,
cylindrical, etc. In this case, there are certain of the tool and the workpiece based on
the results of creating separate models of
disadvantages compared to the option of using machines, as well as on the basis of the
direct drives. However, these are quite competitive outline design of unified gamut of machines,
solutions to the problem, which can be successfully are discussed below.
applied in individual cases and in the design of
new equipment. Gamma of vertical hobbing machines.
When developing new machines, most firms Diameter of the machined wheel: 200
use direct drives in the shaping chain. In this - 1250 mm (according to GOST 659-89).
case, the source of movement is located on the
Source: rospotrebnadzor.ru For five sizes of machines, the basic model
Author: Valeria Smelova working body of the machine and between it and for the first three is a machine 5320F4 ø200
Editor: Tatyana Averkina the final link carrying the tool or workpiece, there
Lead Designer: Alexey Drozdov are no intermediate gears (gear, belt), as well as mm, and for the rest (800 and 1250 mm.) -
Art Director: Denis Zolotarevria.ru a machine ø800 mm.
couplings.
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