Figure 1 3DMMS Geometry dialog box
•Cross Section: Defines the type of spring cross-section. It is used for automatic calculation of spring geometry and properties of beam forces. The center of the cross-section is located on the imaginary spline, which is defined the relationship between helix and height of spring.
•Circle: Is the section option for circle type cross section spring.
o Diameter: Defines the circle diameter of spring.
•Sub-Oval: Is the section option for Sub-Oval type cross section spring. This cross section is divided circle area and oval area. Then, Width, Thickness, and Exponent are defined for the sub-oval option
Figure 2 Selection Sub-Oval option of Cross Section
o Width (
): Defines the width of cross
section.
o Thickness (
): Defines the thickness of the cross
section.
o Exponent (
): Defines the exponential number to
define the oval part of cross section in follow formulation.
Figure 3 Cross Section of spring
•Direction of Helix: Defines the direction for coiling of spring.
Figure 4 Right hand helix direction (right spring) & left hand helix direction (left spring)
•Overall height (
): Shows the total length of
spring.
•Inside diameter (
): Defines the inside
diameter of spring coil.
o Outside diameter (
): Is the outside diameter of
spring coil. It is calculated internally. (
)
o Central spline diameter
(
): Is the diameter for
defining the origin of cross-section of wire. It is calculated internally.
(
)
•Num of segment: Shows the number of segments in a helix
•Num
of helix (
): Shows the total number of helixes of
spring.
•Effective num of helix (
): Shows the number of
helixes which can work as spring actually.
•Coil Center Line Profile Information: Defines the number of helix and radius along to height. For more information, click here.
•Pitch angle in B division (
): If some range coils is
denser or sparser than other range, the upper part of this range is named B
division and the other is named A division. Pitch angel in B division is the
inclined angle of the line in the B division range of the imaginary spline for
the center of cross-section of coil.
•Num
of helix in B division (
): Shows the number of helixes in the B
division.
•Thickness of A edge gap (
): Shows the gap between
coils in the range of non-effective helices of bottom.
•Thickness of B edge gap (
): Shows the gap between
coils in the range of non-effective helices of top.
•Spline interpolation coefficient 1(
): The lines in
the below figure are connected with arcs. The blue and red line in below figure
is connected with this RI1. The unit of this coefficient is mm always regardless
the system unit.
•Spline interpolation coefficient 2(
): The red and
green line in below figure is connected with this RI2. The unit of this
coefficient is mm always regardless the system unit.
•Spline interpolation coefficient 3(
): The green and yellow line in Figure 5
is connected with this RI3. The unit of this coefficient is mm always regardless
the system unit.
Figure 5 Imaginary spline for the center of cross-section of coil