Tool for chip removing machining as well as a cutting edge exchange mechanism therefor

Patent metadata

Field	Value
Publication number	US-9737939-B2
Application number	US-201515303351-A
Country	US
Kind code	B2
Filing date	Feb 18, 2015
Priority date	Apr 16, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A tool for a chip removing machining includes a basic body and a replaceable cutting insert, which is indexable by a cutting edge exchange mechanism. The cutting edge mechanism includes an ejector, which in a front part has an attachment for the cutting insert and interacts with a device for transforming a rectilinear, axial projection of the ejector into a simultaneous turning of the same. The cutting edge exchange mechanism includes a stop collar, which is fixedly anchored in relation to the basic body, and through which the ejector is movable back and forth and a carrier included in a rear part of the ejector. In addition, between the carrier and the stop collar, there is arranged a mechanical compression spring, which spaces the carrier from the stop collar. In addition, an autonomous cutting edge exchange mechanism is disclosed.

First claim

The invention claimed is:

1. A cutting edge exchange mechanism for tools for chip removing machining, the cutting edge exchange mechanism comprising:
an ejector, which, in a front part, includes an attachment for replaceable cutting inserts;
a turning device for transforming a rectilinear, axial movement of the ejector into a simultaneous turning of the same;
a fixedly anchorable stop collar, through which the ejector is movable back and forth;
a carrier included in a rear part of the ejector; and
a compressible force generator disposed between the carrier and the stop collar, the force generator spacing apart the carrier from the stop collar.

2. The cutting edge exchange mechanism according to claim 1 , further comprising a pair of sleeves, the stop collar being disposed in one sleeve and the carrier being disposed in another sleeve, each sleeve including a cylinder wall, each cylinder wall being radially separated from the ejector, the force generator being located between the ejector and each of the cylinder walls, wherein the turning device is included in each of the cylinder walls of the sleeves.

3. The cutting edge exchange mechanism according to claim 2 , wherein the turning device comprises two sets of pointed teeth pointing at each other, a set of teeth being arranged in the cylinder wall of each sleeve, each tooth including an obliquely cut edge surface, which extends between a point and a tooth gap bottom.

4. The cutting edge exchange mechanism according to claim 3 , wherein the stop collar includes a seat arranged to receive the cutting insert, the seat being a gear rim having tangentially spaced-apart cogs, each cog including a shallowly tilted flank surface and a steeply tilted flank surface, which together the shallowly and steeply tilted flank surface delimit an individual gash.

5. A cutting edge exchange mechanism according to claim 1 , wherein the force generator is a mechanical compression spring.

6. A tool for chip removing machining, comprising:
a basic body;
a replaceable cutting insert; and
a cutting edge exchange mechanism including an ejector, which, in a front part, includes an attachment for the replaceable cutting inserts, a turning device for transforming a rectilinear, axial movement of the ejector into a simultaneous turning of the same, a fixedly anchorable stop collar, through which the ejector is movable back and forth, a carrier included in a rear part of the ejector, and a compressible force generator disposed between the carrier and the stop collar, the force generator spacing apart carrier from the stop collar, the cutting insert being indexable by means of the cutting edge exchange mechanism.

7. The tool for chip removing machining according to claim 6 , wherein the stop collar includes a seat arranged to receive the cutting insert, the seat being a gear rim having tangentially spaced-apart cogs, each cog including a shallowly tilted flank surface and a steeply tilted flank surface, which together the shallowly and steeply tilted flank surface delimit an individual gash.

8. The tool according to claim 7 , wherein the cutting insert includes a second gear rim having analogous cogs arranged to engage gashes of the first gear rim.

Assignees

• Sandvik Intellectual Property

Inventors

• Norstedt Anders
• Sunnvius Ulrik

Classifications

• B23C5/2252

  for plate-like cutting inserts fitted on an intermediate carrier, e.g. shank fixed in the cutter body · CPC title

• B23C5/2213

  having a special shape · CPC title

• B23C5/24 Primary

  adjustable · CPC title

• B23C5/06

  Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface · CPC title

• B23C2210/161

  Elastically deformable clamping members · CPC title