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PRODUCTION AUTOMATION

calculating this diameter. It is indicated teeth of the gearwheel cutter and blunting
only that for x <xmin a cut occurs. Since of the longitudinal edges, cut, modification
undercutting reduces the coefficient of of the teeth of the wheel);
mechanical overlap εα, it is necessary to ●about the possibility of radial
know what size it will be when undercutting. assembly of the internal gear transmission.
The calculation of dl for x <xmin is carried Upon completion, the program generates
out according to the method described in three text files in the doc format:
[3], Ch. 6. The formulas of this chapter ● calculation results;
are transformed taking into account the ● tables according to GOST 2.403-75
fact that in the end plane of the machined for the drawing of gears and wheels (the
helical gear or wheel of the gear producing columns "designation of the conjugate
contour of the rack tool, it has a rounding wheel drawing" of these tables are not
along the ellipse arc (radius of curvature formed).
of the transition curve of the initial contour The file of calculation results contains
ρf *> 0). In the case of processing a two sections:
straight tooth, this rounding degenerates ●input data for calculating the transfer
into an arc of a circle. The diameter of the and, if processing by the cutters is specified,
boundary points dl of the tooth profile for the initial data of the cutters;
gears and wheels with an external tooth ● calculation results.
during undercutting is also calculated in the Each of these sections consists of a
absence of rounding of the tip of the cutting table and text.
edge of the rack type tool (ρf * = 0). When The source data section begins with a table
cutting with a gear cutter, the diameter of of the initial data of the transmission and
the boundary points dl of the tooth profile the cutters (if processing is done with the
for gears and wheels with an external tooth cutters) and ends with the text part in which
during cutting is calculated for straight the messages about the selected method
and oblique teeth only for cutters without for controlling the relative position of the
rounding the longitudinal edge of the tooth opposite tooth and wheel tooth profiles and
(rk0 = 0). Geometric calculation of gears, messages (if any) are displayed, which are
the tooth gear and (or) the wheel of which issued by the program when controlling the
are undercut and processed by the cutter source data.
with the blunting of the longitudinal edge of The section of calculation results
the tooth (νk0> 0), is not performed. The begins with the text part, in which the
program checks the quality of engagement results of checking the transmission quality
according to geometric indicators provided indicators are written, and ends with the
for in the standards, displays information: table of values of all calculated geometric
● about the calculated radial clearance transmission parameters with the input
in the gear and gear wheels data entered and, if the degree of accuracy
●on the method of hardening, for is specified, the dimensional tolerances
which the normal thickness of the gear tooth for controlling the relative position of
and wheel on the surface of the vertices is the opposite profiles of gear teeth and
sufficient; wheels, tolerances on the center distance,
● on the possibility of radial feed of the parallelism and skew of the axes in the
gearwheel cutter when machining a wheel gear, the direction of the tooth line, the size
with an internal tooth (it is made relative to of the contact spot in the gear.
the possible interference of the tops of the In fig. 1 ... 8 are tables on the
teeth of the gearwheel cutter with the tops drawings of wheels and gears created by
of the teeth of the machined wheel without the program. Files of tables of calculation
taking into account possible blunting of the results are not given due to their large size.

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