Drilling tool and method for producing a drilled hole

1. A tool for forming a drilled hole (B), comprising:

a shank that is rotatable about a tool axis (A);

at least one first portion, which is rotatable about the tool axis (A), for producing and/or widening a drilled hole (B) by chip cutting; and

a second portion, which rotates about the tool axis (A), for widening a drilled hole (B) without chip cutting;

wherein the second portion is arranged behind the first portion in a direction of advance (V) of the tool,

wherein there is/are one or more cutting portions arranged in the first portion,

at least one of the one or more cutting portions is a secondary cutting portion;

the at least one secondary cutting portion(s) is/are arranged substantially parallel to the tool axis (A);

there is at least one forming ridge arranged in the second portion;

the forming ridge extends substantially parallel to the at least one secondary cutting portion(s); and

the forming ridge has a clearance angle (β) oriented contrary to the direction of advance (V).

2. The tool as claimed in claim 1 , wherein at least one of the cutting portions is a primary cutting portion, for cutting and/or widening a drilled hole (B).

3. The tool as claimed in claim 1 , wherein the second portion is designed such that a pore-free drilled-hole wall is produced.

4. The tool as claimed in claim 1 , wherein:

the first portion has a first diameter (D 1 ), and the second portion has a second diameter (D 2 ); and

the first diameter (D 1 ) is less than the second diameter (D 2 ).

5. The tool as claimed in claim 1 , wherein the tool has one or more oil grooves and/or one or more coolant supply channels.

6. A method for producing a drilled hole (B) with a tool as claimed in claim 1 having the following steps:

producing and/or widening a drilled hole (B) by chip cutting; and

widening the drilled hole (B) without chip cutting.

7. The method as claimed in claim 6 , further comprising:

producing a closed, smooth drilled-hole wall from an open-pored drilled-hole wall as the drilled hole (B) is widened.

8. A tool for forming a drilled hole (B), comprising:

a shank that is rotatable about a tool axis (A);

at least one first portion, which is rotatable about the tool axis (A), for producing and/or widening a drilled hole (B) by chip cutting; and

a second portion, which rotates about the tool axis (A), for widening a drilled hole (B) without chip cutting;

wherein the second portion is arranged behind the first portion in a direction of advance (V) of the tool,

wherein there is/are one or more cutting portions arranged in the first portion,

at least one of the one or more cutting portions is a secondary cutting portion;

the at least one secondary cutting portion(s) is/are arranged substantially parallel to the tool axis (A);

the at least one secondary cutting portion(s) having cutting bevels with a length ( 1 s);

wherein the tool comprises a plurality of forming ridges with forming bevels, the forming ridges being arranged parallel to the at least one secondary cutting portion(s);

wherein the forming bevels extend in the first portion and second portion, the forming bevels having a length ( 1 f), the length ( 1 f) of the forming bevels being greater than the length ( 1 s) of the cutting bevels.

9. The tool of claim 8 , wherein the forming ridges and the at least one secondary cutting portion(s) are arranged alternately.

10. The tool of claim 8 , wherein a forming diameter (DF) of the forming ridge is greater than a cutting diameter (DS) of the at least one secondary cutting portion(s).