hei'ya Rahul, welcome to the forum,
see att-prt, to get you started,
hope this helps- have a good'n kelef
helical-spring.SLDPRT.zip 659.3 KB
This is not my need. I want detail procedure how to design closed and ground end helical spring, if you know then help me but please don't reply with a spring snapshot. This snapshot cann't help anyone.
Welcome to SOLIDWORKS forums Rahul.
Please be generous and check the attachment Kelef has shared before making any comments. He has added the snapshot to give you the quick glimpse of the file he has made.If that is not what you need then please add more details like size, pictures, links, etc.
You might also find this post helpful for your future reference.
For myself, still being fairly new to SW, I find that springs are rather complex geometries for beginners to design. I have attached a spring generating macro that SW will run. It is a great timesaver. You can create compression, extension, spiral, and torsion springs, all using the same macro. Also, you can select different end types, as well as various shapes for the section profile.
(1) Download the attached file, and save it to your computer.
(2) Sketch a circle in a new part document to represent the diameter of your spring.
(3) Go to Tools- near the bottom of the list, click Macro, then select Run.
(4) Browse to your storage location of the file, select it, and open.
(5) The macro dialogue box will populate your feature manager, and you can fill in your options, just like a standard SW feature.
Hope this is helpful.
Spring Macro.swp.zip 169.0 KB
hei'ya Rahul, sorry I've apparantley have misunderstood,
"anyone suggest me procedure how to make it in solidwork 2012??",
let's see if we can get you on with the project more positively-
you wish to "design" a closed end helical compression spring- ok
my pointers would be-starting with
The selection of material is usually the first step in design.
Material can be based on tensile strength, temperatures,
elastic modulii, fatigue boundaries, corrosion, and not least of all-cost,
other factors than these will also need to be adhered to as in the design brief stipulations
samples may be:-HCSS - High-carbon spring steels as (ASTM A228),(ASTM A227)
High Tensile Hard Drawn (ASTM A679),Oil Tempered (ASTM A229),
Carbon Valve (ASTM A230)
your design brief may stipulate:-
Geometry - Length, Wire Diameter, Coil Diameter, Mass - you have none given
Material Data - Elastic Modulie, Poisson's Ratio, Density - you have none given
End Treatment - Closed and Ground- but no conditions thereof
required considerations for modeling/designing:-
primary spring geometric design parameters would be-
Free Length (Lo) - The length of uncompressed spring.
Wire Diameter (d) - The diameter of the wire
Coil Diameter (D) - The mean diameter of the helix, i.e., (D outer + D inner)/2.
Total Coils (Nt)- The number of coils or turns in your spring.
Active Coils (Na) - The number of coils that are live and compress
Solid Length (Ls) - The minimum length at full duress of the coils.
Pitch (p) - The distance from center to center of one revolution of live coil
Pitch Angle (a) - Angle between coils and base.
The angle would be calculated thru: a=arctan(p/(pi*D))
Geometric Notations and calculation-
Live Coils, =Na i.e. = Nt-2
Free Length, =Lo i.e.= Nap+2d
Solid Length, =Ls i.e.= (Na+2)d
Pitch, =p i.e.= (Lo-2d)/Na
(as in the att.prt I assumed one inactive coil at each end of the spring)
Outer Diameter (Do) - Do=D+d - The outer diameter of the spring
Inner Diameter (Di) - Di=D-d - The inner diameter of the spring
Spring Index (C) - C=D/d - The ratio of mean coil diameter to wire diameter
beyond these there are also e.g.:-
Wire Length (Lw) - The length needed for the spring. Lw=(pi*D)*((Na/cos(a))+Ni*a)
Spring Mass (M)
Natural Frequency (fn)
Maximum Load (Pmax) - full compression
Maximum Deflection (dmax) - to reach full compression
Spring Rate (k)- unit deflection
Slenderness Ratio (Lo / D)
Shear Modulus (G)
Uncorrected Maximum Shear Stress (tmax)
Corrected Maximum Shear Stress (tmax')
but I'm rambling now-
these will all, and more be required to define a final design,
that will have to adhere to the letter of the design brief-
I unfortunately have no experience in designing any type of springs
but please see the att.prt as a representation
you can change the global variables in the Equations folder
and hopefully this will be of some use to you
my apologies once again for misunderstanding you- kelef
varispring.SLDPRT.zip 877.2 KB
Thank you so much, Kelef. I am applying your guide to design a new spring for Pogo pin. Thanks again.