tool die design metal stamping


 

Tool & Die Making
Articles
Bend Radius
Deep Drawn
Fine Blanking
Formular
Progression strip layout

Slug pulling prevention
Tool die Design
Tool die design book


Jig and Fixture
Jigs and Fixture Design


Materials treatment
Annealing metal
Case hardening
Density
Electrical Conductivity
heat treatment process
heat treating steel

Thermal Expansion


Material
Aluminum
Alu comparison table
Aluminum Tempering
Carbon Steel
Copper alloy
Low alloys
Material nations & Equivalents
Nickel alloys

Stainless Steel

Stainless Steel comparison table
Tool Steel equivalent
Tungsten Carbide
Wrought stainless Steel


Manufacturing
Conversion Charts
Drill Angle
Drill size
Energy Efficiency
Math Area
Machining Cutting Time
Technical articles
Work Done
Velocity


Geometric Tolerancing
GDT
Tolerance chart ISO
Surface Roughness
Surface Texture


Quality Control
AQL
Process Capability CPK
Sampling plan
Level I, II, III


Engineering Plastic
Machining of plastic
Selection of plastic


 

Surface Texture and its symbol

A surface roughness value, cut off value or reference length. The processing method, grain direction ( machining direction ) are indicated around the surface texture symbol as shown below :-

       
  surface texture   a = Ra Value
b = Machining method
c = Cut off value, length
d = Grain direction
e = Parameter
f = Parameter other than Ra value
g = Surface undulation
       

 
 
 
Symbol
Meaning
 
 
surface texture
Surface Symbol
 
 
Surface texture symbol
Removal od material by machining is required
 
 
surface finish
Removal of material is prohibited
 
 
Ra value
Upper limit of Ra Value
 
 
Ra
Grain direction
 
 
surface texture
Machining Method
 
 
surface finish
Upper and lower limit of Ra value  
 
 

Surface finished its roughness