Fineboring machine and process for producing bores with any polar and/or axial generating line

Fineboring machine with a turning tool on a boring rod which rotates about an axis, which attaches to a tool holder tangentially to the direction of rotation and can be deflected radially by spring action, for producing bores with any polar and/or axial generating line, comprising:

• (a) a translatory driving servomotor;
• a spring-mounted tool holder which can be deflected by said translatory driving servomotor;
• and
• a turning tool mounted on said tool holder;
• (b) said turning tool having an operation direction;
• said servomotor having a driving direction;
• and the driving direction of the servomotor is perpendicular to the operation direction of the turning tool;
• (c) said servomotor having a driving force;
• a connecting rod having one end and a second end and mounted separately from the servomotor;
• and
• the driving force of the servomotor acting on said one end of the connecting rod;
• (d) said tool holder having a free deflectable end;
• the second end of the connecting rod attached to the free, deflectable end of the tool holder in a fixed position relative to the latter;
• and
• (e) a membrane having a first end which runs perpendicular to the driving direction at its first end;
• and
• said connecting rod attached to said membrane.