Reamer for machining of through-holes
The invention relates to a reamer for machining through-holes, having a base body comprising a clamping region as well as a front-facing machining region with cutting elements, wherein the machining region comprises front-facing chip chambers and regions that are relief-ground on a circular cylindrical lateral surface defining the maximum radial dimension of the reamer in the machining region, which relief-ground regions are spaced apart from the perforated wall in a circular cylindrical through-hole, wherein the chip chambers and adjacent relief-ground regions are separated from one another by lateral surface portions.
1 . A reamer having a base body comprising:
a clamping region; and
a front-facing machining region with cutting elements, wherein the machining region comprises front-facing chip chambers and regions that are relief-ground on a circular cylindrical lateral surface defining the maximum radial dimension of the reamer in the machining region, such that the relief-ground regions are spaced apart from a perforated wall in a circular cylindrical through-hole being machined by the reamer, wherein the chip chambers and adjacent relief-ground regions are separated from one another by lateral surface portions, each chip chamber is bounded by a cutting edge in sections with the cutting edge extending up to the outer circumference, and wherein the machining region has a front side with a front face and a circumferential chamfer towards the lateral surface, wherein the cutting edge abuts the chamfer.
2 . The reamer according to claim 1 , wherein the lateral surface portions separating the chip chambers and the relief-ground regions from one another are L-shaped.
3 . The reamer according to claim 2 , wherein the L-shaped lateral surface portions comprise a respective first leg arranged axially between a chip chamber and a relief-ground region and a second leg arranged between two relief-ground regions in the circumferential direction.
4 . The reamer according to claim 3 , wherein the first legs each have a length in the circumferential direction of the base body and a width in the axial direction of the base body, wherein the length is at least two times greater than the width.
5 . The reamer according to claim 3 , wherein the first legs are arranged on a line circumferentially surrounding the base body, wherein at least 50% of the line length is occupied by the first legs.
6 . The reamer according to claim 3 , comprising coolant supply channels which are arranged circumferentially and extend in the axial direction of the base body, each coolant supply channel being bounded on a first circumferential side by the second leg and abutting the relief-ground region on an opposite circumferential side.
7 . The reamer according to claim 6 , wherein the coolant supply channels each comprise at least one coolant inlet through which coolant is adapted to pass from the base body into the respective coolant supply channel.
8 . The reamer according to claim 7 , wherein cutting edges are formed on one side of each of the chip chambers, and wherein the coolant supply channels each open into the chip chambers on sides that are circumferentially opposite the cutting edges.
9 . The reamer according to claim 6 , wherein cutting edges are formed on one side of each of the chip chambers, and wherein the coolant supply channels each open into the chip chambers on sides that are circumferentially opposite the cutting edges.
10 . The reamer according to claim 1 , wherein the chip chambers each comprise at least one chip guide surface, which is arranged obliquely to a front side of the base body.
11 . The reamer according claim 1 , wherein a nominal diameter of the machining region is between 6 mm to 10 mm, and wherein the lateral surface portions separating the chip chambers and the relief-ground regions from one another have a width of between 0.2 mm and 0.3 mm in the axial direction of the base body.
12 . A reamer, having a base body comprising:
a clamping region; and
a front-facing machining region with cutting elements, wherein the machining region comprises front-facing chip chambers and regions that are relief-ground on a circular cylindrical lateral surface defining the maximum radial dimension of the reamer in the machining region, such that the relief-ground regions are spaced apart from a perforated wall in a circular cylindrical through-hole being machined by the reamer, wherein the chip chambers and adjacent relief-ground regions are separated from one another by lateral surface portions, wherein the lateral surface portions comprise a respective first leg arranged axially between a chip chamber and a relief-ground region and a second leg arranged between two relief-ground regions in the circumferential direction, the first legs each have a length in the circumferential direction of the base body and a width in the axial direction of the base body, wherein the length is at least two times greater than the width.
13 . The reamer according to claim 12 , wherein each chip chamber is bounded by a cutting edge in sections and wherein the cutting edge extends up to the outer circumference.
14 . The reamer according to claim 13 , wherein the machining region has a front side with a front face and a circumferential chamfer towards the lateral surface, wherein the cutting edge abuts the chamfer.
15 . The reamer according to claim 14 , wherein cutting edges are formed on one side of each of the chip chambers, and wherein the coolant supply channels each open into the chip chambers on sides that are circumferentially opposite the cutting edges.
16 . The reamer according to claim 13 , wherein cutting edges are formed on one side of each of the chip chambers, and wherein the coolant supply channels each open into the chip chambers on sides that are circumferentially opposite the cutting edges.
17 . The reamer according to claim 12 , wherein the lateral surface portions separating the chip chambers and the relief-ground regions from one another are L-shaped.
18 . A reamer, having a base body comprising:
a clamping region; and
a front-facing machining region with cutting elements, wherein the machining region comprises front-facing chip chambers and regions that are relief-ground on a circular cylindrical lateral surface defining the maximum radial dimension of the reamer in the machining region, such that the relief-ground regions are spaced apart from a perforated wall in a circular cylindrical through-hole being machined by the reamer, the chip chambers and adjacent relief-ground regions are separated from one another by lateral surface portions, the lateral surface portions include a respective first leg arranged axially between a chip chamber and a relief-ground region and a second leg arranged between two relief-ground regions in the circumferential direction, the lateral surface portions separating the chip chambers and the relief-ground regions from one another are L-shaped, each chip chamber is bounded by a cutting edge in sections with the cutting edge extending up to the outer circumference, the machining region has a circumferential chamfer extending from a front face of the machining region to the lateral surface, wherein the cutting edge abuts the chamfer.