785 county line rd po box 509 palmyra in.
Sheet metal shear blade clearance.
When the punch impacts the sheet the metal in this clearance quickly bends and then fractures.
Toll free 1 800 235 6433 local 812 364 1448 email.
We supply shear blades for the following machines.
A small clearance typically 10 20 of the material thickness exists between the punch and die.
Metal shearing on machines like.
Grinding can sharpen any shear blade up to 14 within the same precision tolerances as new knives to maintain high productivity and quality cuts.
In imperial units blade clearance is set to 0 06 per each inch of plate thickness up to 1 and to 0 04 per inch of plate thickness over 1.
In imperial units a 1 2 plate should be cut at 0 06 x0 5 0 03 blade clearance.
The hydraulic press drives the punch downward at high speed into the sheet.
Tighten the bolt with forward strength which can help reduce the clearance between upper blade 24 and lower blade 25.
The bow bolt 70 can be adjusted if the cutter head cannot cut the workpiece.
Should information on shear blade clearance not be available general rule would be to set the shear blade clearance at 7 of the material thickness of the material being sheared.
For example a 16 mm thick plate should be cut with a 0 04 16 0 64 mm blade clearance.
The chart is based on 80 000 psi tensile material.
The tolerances for sharpening the width and thickness will be parallel to within 002 from end to end.
The minimum clearance should be adjusted between 0 05 0 1 mm.
Has the best blade and price for your application.
Accurshear amada pacific and standard shears.
See figure 5 to adjust the blade up or down loosen the nut 52 and drop the pin 52 on the treadle 54.
Appie i second what jr says most shears work well on 7 5 10 i have a high speed mechanical shear though which shears 1 7mm mild steel all on the one clearance of 0 1mm this is what the manufacturer recommends and it works 48 cuts a minute at 10ft long if you can push the sheet fast enough the machine cost 70 000 in 1978.
This chart would assume the shear is in good working condition with sharp blades using the proper shear blade clearance and rake angle.