Metal cutting tool

A metal cutting insert for use in a metal cutting tool, said insert comprising:

• upper and bottom faces,
• laterally directed front and rear faces,
• a pair of longitudinally directed side faces,
• a laterally directed front cutting edge defined at a junction of said upper and front faces,
• a rake surface formed in said upper face adjacent said front cutting edge,
• chip forming means forming in said rake surface and including adjoining relatively raised and recessed portions, and
• bore means for cooling said insert and for deflecting a chip cut by said cutting edge away from said insert, said bore means including at least one through-going bore formed in said insert, each said bore extending in a direction towards said cutting edge from a bore inlet formed in said bottom surface to a bore outlet formed in one said recessed portion so as to be superposed by the chip cut by said cutting edge and passing over said rake surface, said bore outlet being spaced from the cut chip by reason of said raised portions on which the cut chip rides, each said bore adapted to be coupled to a cooling fluid duct in an insert holder which releasably retains said insert;
• and a cooling supply means in fluid communication with the cooling fluid duct to supply cooling fluid to the bore means at a pressure of from 1 to 20 atmospheres.

A metal cutting tool comprising:

• a metal insert including:
• upper and bottom faces,
• laterally directed front and rear faces,
• a pair of longitudinally directed side faces,
• a laterally directed front cutting edge defined at a junction of said upper and front faces,
• a rake surface formed in said upper face adjacent said front cutting edge,
• chip forming means formed in said rake surface and having adjoining relatively raised and recessed portions, and
• bore means for cooling said insert and for deflecting a chip cut by said cutting edge away from said insert, said bore means including at least one through-going bore formed in said insert, each said bore extending in a direction towards said cutting edge from a bore inlet formed in said bottom surface to a bore outlet formed in one said recessed portion so as to be superposed by the chip cut by said cutting edge and passing over said rake surface,
• insert holder means for releasably retaining said insert, said insert holder means being formed with a cooling fluid duct having one end adapted to be coupled to a cooling fluid supply source and an opposite end coupled to said bore inlet when said insert is retained in said insert holder means,
• a cooling and fluid source in communication with the cooling fluid duct to provide cooling fluid at a pressure of from 1 to 20 atmospheres to the bore means in the insert.

A metal cutting insert for use in a metal cutting tool, said insert comprising:

• upper and bottom faces,
• laterally directed front and rear faces,
• a pair of longitudinally directed side faces,
• a laterally directed front cutting edge defined at a junction of said upper and front faces,
• a rake surface formed in said face adjacent said front cutting edge,
• chip forming means formed in said rake surface and including adjoining relatively raised and recessed portions, and
• bore means for cooling said insert and for deflecting a chip cut by said cutting edge away from said insert, said bore means including at least one through-going bore formed in said insert, each said bore extending in a direction towards said cutting edge from a bore inlet formed in said bottom surface to a bore outlet formed in one said recessed portion so as to be superposed by the chip cut by said cutting edge and passing over said rake surface, each said bore adapted to be coupled to a cooling fluid duct in an insert holder which releasably retains said insert and
• a cooling fluid supply means in fluid communication with the cooling fluid duct to supply cooling fluid to the bore means at a pressure of from 1 to 20 atmospheres.