Cutting tool

• US 6,902,357 B2
• Filed: 07/29/2002
• Issued: 06/07/2005
• Est. Priority Date: 08/01/2001
• Status: Active Grant

• Current Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Original Assignee: Hilti Aktiengesellschaft (Hilti Martin Family Trust)
• Inventors: Wanger, Werner, Blessing, Matthias
• Primary Examiner(s): Howell, Daniel W.
• Application Number:
  US10/208,524
• Publication Number:
  US 20030026668A1
• Time in Patent Office: 1,044 Days
• Field of Search: 408/204, 408/205, 408/206, 408/207, 408/208, 408/209, 408/703, 408/231, 408/232, 407/41, 407/49, 407/50, 407/108, 407/109, 407/110
• US Class Current: 408/204
• CPC Class Codes: B23B 2205/02 Fixation using an elastically deformable clamping member
• CPC Class Codes: B23B 51/0426 with centering devices
• CPC Class Codes: B23C 5/2243 for plate-like cutting inserts B23C5/2252, B23C5/226 take precedence
• CPC Class Codes: Y10T 407/1922 Wedge clamp element
• CPC Class Codes: Y10T 407/194 Resilient clamp jaw
• CPC Class Codes: Y10T 408/895 Having axial, core-receiving central portion
• CPC Class Codes: Y10T 408/90987 Wedge means

Abstract

A rotatable cutting tool having s support region (1) with an end surface (2) and a plurality of recesses (4) extending from the end surface (2) and in which, respectively, a plurality of cutting elements (5) are arranged, with each recess having a rigid stop surface (7) for a cutting element (5) and faces in a rotational direction (R) of the tool, and a gripping surface (8) facing in a direction opposite the tool rotational direction (R) and cooperating with the cutting element, with the gripping surface (8) being displaceable by a respective locking element in the direction opposite the tool rotational direction.

Claims

1. A rotatable cutting tool, comprising a receiving region (3);

a tubular-shaped support region (1) having an end surface (2) remote from the receiving region (3) and a plurality of circumferentially spaced from each other, recesses (4) formed in the support region and extending from the end surface (2) in a direction toward the receiving region (3);

a plurality of cutting elements (5) arranged in respective recesses (4); and

a plurality of locking elements displaceable in a direction substantially parallel to a longitudinal extent of the recesses (4) for securing respective cutting elements (5) in the respective recesses (4),

wherein each recess (4) has a rigid stop surface (7) for a cutting element (5) and which is formed by the support region (1) and faces in a rotational direction (R) of the tool, and a gripping surface (8) facing in a direction opposite the tool rotational direction (R) and cooperating with the cutting element, the gripping surface (8) forming part of a segment-shaped section (9) of the support region and being displaceable by a respective locking element in the direction opposite the tool rotational direction (R).

2. A cutting tool according to claim 1, wherein the locking elements are formed as tightening screws, and wherein the support region (1) has a plurality of threaded bores (10) extending substantially parallel to the longitudinal extent of the recesses (4) and into which the tightening screws extend, respectively.

3. A cutting tool according to claim 2, further comprising means for displacing segment-shaped section (9) and, thereby, the gripping surface (8) upon the tightening screw (6) being screwed the respective threaded bore (10), the displacing means comprising at least one of a region (11) provided on the tightening screw (6) and expanding in an operational direction of the tool, and an adjacent region (12) of the segment-shaped section (9) and tapering inward in the tool operational direction.

4. A cutting tool according to claim 3, wherein the tightening screw region (11) is formed by a head (13) of the tightening screw (6) and having a conical outer profile.

7. A cutting tool according to claim 1, further comprising means (18) for formlockingly securing the cuffing elements (5) in respective recesses (7).

5. A rotatable cutting tool, comprising a receiving region (3);

a support region (1) having an end surface (2) remote from the receiving region (3) and a plurality of circumferentially spaced from each other, recesses (4) formed in the support region and extending from the end surface (2) in a direction toward the receiving region (3);

a plurality of cutting elements (5) arranged in respective recesses (4); and

a plurality of locking elements displaceable in a direction substantially parallel to a longitudinal extent of the recesses (4) for securing respective cutting elements (5) in the respective recesses (4),

wherein each recess (4) has a rigid stop surface (7) for a cutting element (5) and which is formed by the support region (1) and faces in a rotational direction (R) of the tool, and a gripping surface (8) facing in a direction opposite the tool rotational direction (R) and cooperating with the cutting element, the gripping surface (8) forming part of a segment-shaped section (9) of the support region and being displaceable by a respective locking element in the direction opposite the tool rotational direction (R), and

wherein the support region (1) comprises a plurality of indentions (14) formed in the end surface (2) and adjoining respective recesses (4) at a side of the respective recesses (4) remote from the stop surface (7), the indentations (14) extending each in the tool rotational direction (R) by a distance greater than a distance between a respective tightening screw (6) and the gripping surface of the respective recess (4).

6. A cutting tool according to claim 5, wherein each indentation (14) has a depth (T), measured from the end surface (2) and which increases in the rotational direction (R) from the respective recess (4) toward the respective tightening screw (6).

8. A cutting tool according to claim 5, further comprising means (18) for formlockingly securing the cutting elements (5) in respective recesses (7).

9. A rotatable cutting tool, comprising a receiving region (3);

a support region (1) having an end surface (2) remote from the receiving region (3) and a plurality of circumferentially spaced from each other, recesses (4) formed in the support region and extending from the end surface (2) in a direction toward the receiving region (3);

a plurality of cutting elements (5) arranged in respective recesses (4); and

a plurality of locking elements displaceable in a direction substantially parallel to a longitudinal extent of the recesses (4) for securing respective cutting elements (5) in the respective recesses (4),

wherein each recess (4) has a rigid stop surface (7) for a cutting element (5) and which is formed by the support region (1) and faces in a rotational direction (R) of the tool, and a gripping surface (8) facing in a direction opposite the tool rotational direction (R) and cooperating with the cuffing element, the gripping surface (8) forming part of a segment-shaped section (9) of the support region and being displaceable by a respective locking element in the direction opposite the tool rotational direction (R), and

wherein the support region (1) comprises a plurality of first openings (15) extending behind respective recesses (4), and a plurality of second openings (17) located circumferentially adjacent to respective first openings (15) and forming therebetween articulations (16) elastically deformable by respective tightening screws (6).

10. A cutting tool according to claim 9, further comprising means (18) for formlockingly securing the cutting elements (5) in respective recesses (7).

11. A rotatable cutting tool, comprising a receiving region (3);

a support region (1) having an end surface (2) remote from the receiving region (3) and a plurality of circumferentially spaced from each other, recesses (4) formed in the support region and extending from the end surface (2) in a direction toward the receiving region (3);

a plurality of cutting elements (5) arranged in respective recesses (4); and

a plurality of locking elements displaceable in a direction substantially parallel to a longitudinal extent of the recesses (4) for securing respective cutting elements (5) in the respective recesses (4),

wherein each recess (4) has a rigid stop surface (7) for a cutting element (5) and which is formed by the support region (1) and faces in a rotational direction (R) of the tool, and a gripping surface (8) facing in a direction opposite the tool rotational direction (R) and cooperating with the cutting element, the gripping surface (8) forming part of a segment-shaped section (9) of the support region and being displaceable by a respective locking element in the direction opposite the tool rotational direction (R), and

wherein each recess (4) has opposite rigid stop surface (7) and gripping surface (8), and the cutting tool includes means for formlockingly connecting a respective cutting element (5) with at least one of the rigid stop surface (7) and the gripping surface (8) of a respective recess (4),

wherein the formlockingly connecting means comprises a cylindrical pin (18) extending into complementary grooves formed in the respective cutting element (5) and the at least one of the rigid stop surface and the gripping surface of the respective recess.