Cutting tool as well as a holder blade therefor

• US 9,457,410 B2
• Filed: 11/07/2013
• Issued: 10/04/2016
• Est. Priority Date: 11/08/2012
• Status: Active Grant

• Current Assignee: Sandvik Intellectual Property AB (Sandvik AB)
• Original Assignee: Sandvik Intellectual Property AB (Sandvik AB)
• Inventors: Trnstrm, Roger
• Primary Examiner(s): Addisu, Sara
• Application Number:
  US14/074,061
• Publication Number:
  US 20140126969A1
• Time in Patent Office: 1,062 Days
• Field of Search: 407/117, 407/101, 407/106, 407/110, 407/109, 407/107, 407/111, 407/88, 821/13
• US Class Current: 1/1
• CPC Class Codes: B23B 2205/02 Fixation using an elastically deformable clamping member
• CPC Class Codes: B23B 2210/027 Means for adjusting the grooving inserts
• CPC Class Codes: B23B 2260/12 Stops depth controls B23B2260/0482
• CPC Class Codes: B23B 2260/136 Springs
• CPC Class Codes: B23B 25/06 Measuring, gauging, or adjusting equipment on turning-machines for setting-on, feeding, controlling, or monitoring the cutting tools or work measuring devices or gauges G01B
• CPC Class Codes: B23B 27/086 with yieldable support for the cutting insert
• CPC Class Codes: B23B 29/06 Tool holders equipped with longitudinally-arranged grooves for setting the cutting tool
• CPC Class Codes: B23B 29/248 with individually adjustable toolholders
• CPC Class Codes: B23B 5/14 Cutting-off lathes B23D21/00 takes precedence shearing B23D
• CPC Class Codes: Y10T 407/2244 by movement of seat relative to holder
• CPC Class Codes: Y10T 407/227 with separate means to fasten tool seat to holder

Abstract

A cutting tool for tube cutting machines includes a tool holder and a dismountable holder blade having replaceable cutting inserts. The tool holder includes a basic body, as well as a support body for the holder blade. There is arranged between the basic body and the support body a set-up body, by means of which the support body, and thereby the holder blade, can be set and fixed in the exact, desired spatial positions in the machine without time-consuming measuring and fine adjustment operations. In addition, the holder blade is fixed in the support body by means of a single simple screw, which allows a flexible mounting and dismounting of the same.

Claims

1. A cutting tool, comprising:

a tool holder including a basic body and a support body, the support body having a slot countersunk in a front side facing away from the basic body, the slot being delimited by a bottom and two mutually parallel limiting edges;

a holder blade formed with at least one seat for a replaceable cutting insert, the holder blade having an elongate basic shape including two plane-parallel side surfaces, two opposite and mutually parallel longitudinal edges, and two opposite ends, the holder blade being detachably mounted in the slot and adjustable and fixable in different axial projection positions in relation to the basic body; and

a set-up body arranged between the basic body and the support body, the set-up body being actuated by a spring device to displace the set-up body axially in relation to the basic body against a force of the spring device, the set-up body being fixable in a desired position in relation to the basic body by a screw joint, wherein the holder blade is fixed in a predetermined, axial position in the slot of the support body by a stop member including a screw that extends through a through hole through the holder blade and is tightened in a threaded hole that mouths in the bottom of the slot.

2. A cutting tool according to claim 1, wherein a width of the slot between the limiting edges is greater than a width of the holder blade between the longitudinal edges to allow mounting and dismounting of the holder blade with a side surface facing the bottom of the slot, the through hole in the holder blade having a keyhole-like contour shape including a circular section, a diameter of which is greater than a diameter of a screw head of the screw, and an elongate section that extends from the circular section to an end surface thereof, the elongate section having a width that is smaller than the diameter of the screw head.

3. A cutting tool according to claim 2, wherein the holder blade includes two seats disposed in corners between the longitudinal edges and ends of the holder blade, the through hole including two elongate sections running from a common, circular section, the end surfaces of which elongate sections are situated at equally large axial distances from adjacent seats.

4. A cutting tool according to claim 2, wherein the holder blade includes two seats disposed in corners between the longitudinal edges and ends of the holder blade, the holder blade having two separate through holes having a keyhole-like contour, each keyhole-like contour including a single elongate section running from a circular section, the end surfaces of each elongate section being situated at the same axial distance from adjacent seats.

5. A cutting tool according to claim 1, wherein the set-up body includes means for detachably receiving a projecting sensor for determining the axial position of the detached and spring-loaded set-up body in relation to the basic body depending on the distance to a work piece.

6. A cutting tool according to claim 1, wherein the support body is axially displaceable in relation to the set-up body via a guide in the form of a straight chute and a male member engaging the same.

7. A cutting tool according to claim 1, wherein the support body is fixable in one of a plurality of axial positions in relation to the set-up body by means of at least one fixing screw that extends through one of a plurality of axially separated holes through the support body and is tightened in a threaded hole in the set-up body.

8. A cutting tool according to claim 7, wherein in the set-up body there are included a plurality of threaded holes that are axially separated.

9. A holder blade for a cutting tool comprising:

two plane-parallel side surfaces;

two opposite and mutually parallel longitudinal edges;

two opposite ends;

two diagonally opposite seats for replaceable cutting inserts, the seats each having an elongate basic shape and being disposed in corners between the longitudinal edges and the ends; and

two separate through holes arranged to receive a single fixing screw, each through hole having a keyhole-like contour, each keyhole-like contour including a circular section and a single elongate section having an end surface and running from the circular section to the end surface, the elongate section having a width that is smaller than a diameter of the circular section, the end surfaces of each elongate section being disposed at the same axial distance from an adjacent seat, wherein the through holes are located equidistantly from the longitudinal edges, each through hole being oriented such that the elongate section of the through hole is parallel to the longitudinal edges, the end surface being part of the through hole located closest to the adjacent seat.

10. A holder blade according to claim 9, wherein the through hole of the holder blade includes two elongate sections running from a common, circular section to an end surface thereof, the end surfaces of the elongate sections being situated at equally large axial distances from adjacent seats.