Automatic system for blade inspection

Automatic system for inspecting one cutting edge of a ring shaped blade, wherein said ring shaped blade is configured to be used in a plant for cutting one sheet of metallic material and extends around a central symmetry axis, said system comprising:

• one supporting and moving group rotatably mounted around one rotation axis and configured to support said ring shaped blade between at least one parking position and at least one reading position and for putting it in rotation around said rotation axis, wherein when said ring shaped blade is supported in said at least one reading position, said rotation axis is coincident with said central symmetry axis of said ring shaped blade;
• one first emitting unit, configured to emit at least one first inspection light beam toward said supporting and moving group and toward said cutting edge of said ring shaped blade, when said ring shaped blade is supported by said supporting and moving group in said at least one reading position;
• one second emitting unit, configured to emit at least one second inspection light beam toward said supporting and moving group and toward said cutting edge of said ring shaped blade, when said ring shaped blade is supported by said supporting and moving group in said at least one reading position;
• one first detecting unit, configured to detect a first light beam reflected from said ring shaped blade, when said first inspection light beam is emitted toward said ring shaped blade, and
• one second detecting unit, configured to detect a second light beam reflected from said ring shaped blade, when said second inspection light beam is emitted toward said ring shaped blade,
• said first detecting unit and said second detecting unit being both positioned at said supporting and moving group and configured to detect, individually or simultaneously, said first light beam reflected from said ring shaped blade and second light beam reflected from said ring shaped blade, respectively, when supported by said supporting and moving group in said at least one reading position and output at least one respective detection signal;
• one control and processing unit operatively connected to said supporting and moving group, said first emitting unit, said second emitting unit, said first detecting unit and to said second detecting unit, configured to receive and process said at least one respective detection signal, and output at least one quality index of the cutting edge of said ring shaped blade.