Shearing

HS 100 and HS 400 plate can be cut by shearing. We do not recommend shearing HS 450 and HS 500. For best results, the following three points must be observed:

1. Clearance between the stationary and the moveable blade increases as the tensile strength increases. Too much or too little clearance results in a poor surface, which can give rise to cracks when welding and forming.
2. Rake angle is a question of balance. The bigger the angle, the less shearing force is required. However, a larger rake angle increases the risk of slipping sideways and twisting the plate being sheared.
3. Shearing force increases with the increasing tensile strength of the plate. Sharp blades with light edge rounding are recommended.
Shearing Force
Shearing force can be calculated using the following formula:
An Example
Shearing of a Typical 3/8" thick plate in HS 100 with rake angle of 3º
Rake angle 3º - shear force 73 tons
Rake angle 4º - shear force 55 tons
Rake angle 5º - shear force 44 tons
An Example
Shearing of a Typical 3/8" thick plate in HS 400. Rake angle 3º - shear force 107 tons

Recommended Adjustment for Clearance and Rake Angle
GRADE CLEARANCE
% of t
RAKE ANGLE TYPICAL VALUES
RM P.S.I. A%
   
A572-65 9-12 2-5
90,000 20
HS 100 12-15 3-5
125,000 17
HS 400 16-18 3-5
181,000 11
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