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CN-116829287-B - Side milling cutter

CN116829287BCN 116829287 BCN116829287 BCN 116829287BCN-116829287-B

Abstract

The invention relates to a side milling cutter (100) having a main body (10) which extends along a predetermined axis of rotation (R) from a first end (11) having an interface for connection to a rotary drive to a free second end (12) on which a bearing surface (14) for the disc-shaped cutter holder (20) is constructed, which is fastened to the second end (12) and which is supported on the bearing surface (14) by a first main surface (21) facing the main body (10), the periphery of which projects radially from the main body (10) and has a central through opening (23) which passes axially through the disc-shaped cutter holder (20). A plurality of coolant supply channels (60) are configured in the body (10) for supplying coolant to the second end (12) of the body (10). A plurality of coolant distribution channels (50) for supplying coolant to the outer periphery of the tool holder (20) are formed in the disc-shaped tool holder (20). At least two of the plurality of coolant distribution channels (50) branch from a common coolant distribution chamber (70; 55, 61, 62) which is arranged between the main body (10) and the disc-shaped tool holder (20), and to which at least two of the plurality of coolant supply channels (60) open.

Inventors

  • Thunder
  • CHRISTIAN.GOEBEL

Assignees

  • 森拉天时奥地利有限公司

Dates

Publication Date
20260508
Application Date
20220131
Priority Date
20210210

Claims (13)

  1. 1. Side milling cutter (100) having A body (10) extending along a predetermined axis of rotation (R) from a first end (11) having an interface for connection to a rotary drive to a free second end (12) on which a bearing surface (14) for a disc-shaped tool holder (20) is configured, and A disc-shaped blade holder (20) fastened to the second end (12) and supported on the bearing surface (14) by a first main surface (21) facing the main body (10), the periphery of the disc-shaped blade holder protruding radially from the main body (10) and having a central through opening (23) axially through the disc-shaped blade holder (20), A plurality of coolant supply channels (60) for supplying coolant to the second end (12) of the body (10) and configured in the body (10), -A plurality of coolant distribution channels (50) for supplying coolant to the periphery of the disc-shaped tool holder (20) and configured in the disc-shaped tool holder (20), and at least two of the plurality of coolant distribution channels (50) branching off from a common coolant distribution chamber (70; 55, 61, 62), which is configured between the main body (10) and the disc-shaped tool holder (20), and at least two of the plurality of coolant supply channels (60) open into the common coolant distribution chamber, wherein the coolant distribution channels (50) each have a first channel portion (52) extending in the interior of the disc-shaped tool holder (20), having a closed configuration on both the side of the first main surface (21) and on the side of a second main surface (22) opposite the first main surface (21) of the disc-shaped tool holder (20), and having at least one outlet opening (51) on the periphery of the disc-shaped tool holder (20), and an inlet portion (53) opening out from the first main surface (21) of the disc-shaped tool holder (20) and only opening out of the disc-shaped main surface (21) in the central region (23), the axial height of the inlet portion (53) leading to the central through opening (23) is at most one third of the thickness of the disc holder (20) at the central through opening (23).
  2. 2. The side milling cutter according to claim 1, wherein the common coolant distribution chamber (70; 55, 61, 62) extends in an annular manner around the rotation axis (R).
  3. 3. The side mill according to claim 1 or 2, the coolant distribution channels (50) each having a connecting portion (54) connecting the inlet portion (53) to the first channel portion (52) and having a closed configuration in the direction of the central through opening (23) and with respect to the second main surface (22).
  4. 4. The side milling cutter according to claim 1 or 2, the coolant distribution chamber (70; 55, 61, 62) having a holder side portion formed by a recess (55) in the disc holder (20), the recess (55) adjoining the first main surface (21) and the central through opening (23) and extending between the inlet portions (53) of the respective coolant distribution channels (50).
  5. 5. The side milling cutter according to claim 1 or 2, wherein a centering pin (16) axially protruding from the bearing surface (14) is configured at the second end (12) of the body (10), and the central through opening (23) in the disc holder (20) is adapted to the outer contour of the centering pin (16).
  6. 6. The side mill according to claim 5, wherein a through opening (17) opening at the second end (12) extends through the centering pin (16).
  7. 7. The side milling cutter according to claim 5, wherein an inner peripheral surface (23 a) of the central through opening (23) of the disc holder (20) sealingly abuts against an outer peripheral surface (16 a) of the centering pin (16).
  8. 8. The side mill according to claim 5, the plurality of coolant supply channels (60) open into the common coolant distribution chamber (70; 55, 61, 62) radially outside the centering pin (16).
  9. 9. The side mill according to claim 5, the coolant distribution chamber (70; 55, 61, 62) having a first body side portion formed by a groove (61) extending around the centering pin (16) and having a deepened configuration relative to the bearing surface (14).
  10. 10. The side milling cutter according to claim 5, wherein the coolant distribution chamber (70; 55, 61, 62) has a second body side portion formed by a circumferential recess (62) formed on the centering pin (16).
  11. 11. The side milling cutter according to claim 1 or 2, the disc shaped holder (20) having a plurality of pockets (25) distributed over the periphery of the disc shaped holder (20) for receiving replaceable cutter inserts (40).
  12. 12. The side milling cutter according to claim 11, the insert seat (25) being configured to receive replaceable cutter inserts (40) such that they each protrude axially from the disc-shaped tool holder (20) on both sides.
  13. 13. The side milling cutter according to claim 11, having a plurality of replaceable cutter inserts (40) fastened to the insert seat (25) and forming a region of the side milling cutter axially furthest protruding from the body (10).

Description

Side milling cutter Technical Field The invention relates to a side milling cutter having a body extending along a predetermined axis of rotation from a first end having an interface for connection to a rotary drive to a free second end on which a bearing surface for a disc-shaped tool holder is constructed, which disc-shaped tool holder is fastened to the second end. Background Side mills are often used for the construction of grooves or slots in a workpiece and for cutting through mainly metallic material, in which case a disc-shaped tool holder is arranged on a body which is configured for connection to a rotary drive, the tool holder having a plurality of cutting edges which are arranged distributed over the periphery of the disc-shaped tool holder. Here, the cutting edge (blade) may be formed in particular by a cutter blade which is held on a corresponding seat of the tool holder and is usually formed from a harder and more wear-resistant material than the body and the disc-shaped tool holder. For example, the body and disc holder may be formed of tool steel and the cutting edge may be formed of carbide, cermet, ceramics or a superhard material such as PCD (polycrystalline diamond) or CBN (cubic boron nitride). DE 20 2017 105 606 U1 describes a side milling cutter with a body and a disc-shaped tool holder fastened to the body. A plurality of coolant supply channels are arranged in the body, the coolant supply channels each opening in an end-side elongated coolant distribution chamber, the coolant being conveyed in each case via the end-side elongated coolant distribution chamber into a plurality of inlet openings of the disc-shaped tool holder. Disclosure of Invention It is an object of the present invention to provide an improved side milling cutter, in which case the supply of coolant to the cutting edges is improved, and in which case the degree of freedom of design in relation to the construction of the disc-shaped tool holder is increased. If the terms axial, radial or tangential are used in the context of the following description, each of these specifications refers to the axis of rotation of the side mill, unless a different meaning is obtained from the specific context. This object is achieved by a side milling cutter according to the present invention. Advantageous refinements are specified in the other preferred embodiments. The face milling cutter has a body extending along a predetermined axis of rotation from a first end having an interface for connection to a rotary drive to a free second end on which a bearing surface for a disc-shaped cutter holder is constructed, the disc-shaped cutter holder being fastened to the second end and supported on the bearing surface by a first main surface facing the body, the periphery of the cutter holder projecting radially from the body and having a central through opening axially through the disc-shaped cutter holder. A plurality of coolant supply channels are configured in the body for supplying coolant to the second end of the body. A plurality of coolant distribution channels for supplying coolant to the outer periphery of the disc-shaped tool holder are formed on the disc-shaped tool holder. At least two of the plurality of coolant distribution channels branch from a common coolant distribution chamber, which is configured between the main body and the disc-shaped tool holder, and at least two of the plurality of coolant supply channels open into the common coolant distribution chamber. Since a common coolant distribution chamber is provided, to which at least two coolant supply channels of the plurality of coolant supply channels open, coolant can be reliably supplied to the outer periphery of the tool holder even if the coolant supply channels are blocked, for example, by contaminants. Because of the provision of a central through opening axially through the disc cutter holder, the side mill may be configured as a so-called insert side mill which, starting from the free second end, may be fastened to the rotary drive by means of a central fastening screw, which is coupled thereto by means of an interface configured at its first end. Preferably, it may be provided that all coolant supply channels of the plurality of coolant supply channels open into a common coolant distribution chamber, and that all coolant distribution channels of the tool holder branch off from the common coolant distribution chamber. According to one refinement, the common coolant distribution chamber extends in an annular manner around the axis of rotation. In this case, a particularly uniform distribution of coolant to all coolant distribution channels is achieved. According to one refinement, the coolant distribution channels each have a first channel portion which extends in the interior of the tool holder, has a closed configuration on both the side of the first main surface and on the side of the second main surface opposite the first main surface of the tool holder, an