Power-tool parting device

Patent metadata

Field	Value
Publication number	US-10160135-B2
Application number	US-201314394299-A
Country	US
Kind code	B2
Filing date	Mar 5, 2013
Priority date	Apr 25, 2012
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A machine tool separating device has at least one cutting line. The cutting line has a changing cutting edge angle geometry along one cutting direction of the cutting line.

First claim

The invention claimed is:

1. A power-tool parting device, comprising:
a cutting strand including at least two cutting strand segments rotatably coupled to each other,
wherein each cutting strand segment includes at least two cutting elements, each cutting strand segment including a cutting edge configured for cutting a workpiece in a cutting plane,
wherein the cutting edge has a cutting-edge angle geometry that varies along a cutting direction of the cutting strand segment, and
wherein at least one of the at least two cutting elements has a different magnitude of clearance angle from others of the at least two cutting elements, the clearance angle defined in the cutting plane,
wherein the at least two cutting strand segments each include a cutter carrier element, and a connecting element connects the cutter carrier element of adjacent ones of said at least two cutting strand segments, and
wherein each cutter carrier element includes;
a stud integral with the cutter carrier element and extending therefrom perpendicular to the cutting plane, and
a recess configured to receive the stud of a cutter carrier element of an adjacent cutting strand segment to rotatably couple adjacent ones of said at least two cutting strand segments.

2. The power-tool parting device as claimed in claim 1 , wherein:
at least one of the at least two cutting elements has a different magnitude of rake angle than others of the at least two cutting elements, the rake angle defined in the cutting plane.

3. The power-tool parting device as claimed in claim 1 , wherein the at least two cutting strand segments each include at least one cutter carrier element, wherein the at least one carrier element together with the at least two cutting elements have a maximum volume that is less than 15 mm 3 .

4. The power-tool parting device as claimed in claim 1 , wherein the at least two cutting strand segments each include at least one cutter carrier element, wherein the at least one carrier element together with the at least two cutting elements have a maximum weight that is less than 1 g.

5. The power-tool parting device as claimed in claim 1 , wherein each cutting strand segment includes three cutting elements spaced apart in the cutting plane.

6. The power-tool parting device as claimed in claim 5 , wherein two of the three cutting elements have the same magnitude of clearance angle and the third of the three cutting elements has a magnitude of clearance angle that is different from the magnitude of the clearance angle of said two of the three cutting elements.

7. The power-tool parting device as claimed in claim 6 , wherein said of the three cutting elements is separated by said third of the three cutting elements.

8. The power-tool parting device as claimed in claim 6 , wherein said two of the three cutting elements have the same magnitude of rake angle and said third of the three cutting elements has a magnitude of rake angle that is different from the magnitude of the rake angle of said two of the three cutting elements.

9. The power-tool parting device as claimed in claim 5 , wherein two of the three cutting elements have the same magnitude of rake angle and the third of the three cutting elements has a magnitude of rake angle that is different from the magnitude of the rake angle of the two of the three cutting elements.

10. The power-tool parting device as claimed in claim 5 , wherein each of the three cutting elements has a magnitude of clearance angle that is different from the magnitude of the clearance angle of the other two of the three cutting elements.

11. The power-tool parting device as claimed in claim 5 , wherein each of the three cutting elements has a magnitude of rake angle that is different from the magnitude of the rake angle of the other two of the three cutting elements.

12. A power tool, comprising:
at least one coupling device configured to couple in a form-fitting and/or force-fitting manner to a power-tool parting device,
wherein the power-tool parting device has at least one cutting strand, the at least one cutting strand having a cutting edge configured for cutting a workpiece in a cutting plane, the cutting edge having a cutting-edge angle geometry that varies along a cutting direction of the cutting strand,
wherein the at least one cutting strand includes at least two cutting strand segments rotatably coupled to each other, each having at least two cutting elements, and
wherein at least one of the at least two cutting elements of each cutting strand segment has a clearance angle having a magnitude that differs from a magnitude of a clearance angle of others of the at least two cutting elements, the clearance angle defined in the cutting plane,
wherein the at least two cutting strand segments each include a cutter carrier element, and a connecting element connects the cutter carrier element of adjacent ones of said at least two cutting strand segments, and
wherein each cutter carrier element includes;
a stud integral with the cutter carrier element and extending therefrom perpendicular to the cutting plane, and
a recess configured to receive the stud of a cutter carrier element of an adjacent cutting strand segment to rotatably couple adjacent ones of said at least two cutting segments.

13. The power-tool parting device as claimed in claim 12 , wherein said connecting element includes a transverse securing element that secures adjacent ones of said at least two cutting segments against movement relative to each other that is transverse to the cutting plane.

14. A power tool system including the power tool as claimed in claim 12 .

Assignees

• Bosch Gmbh Robert

Inventors

• Bozic Milan

Classifications

• B27B33/142 Primary

  Cutter elements · CPC title

• B27B33/14

  Saw chains {(saw chains for slotting or mortising devices B27F5/08)} · CPC title

• B27B33/145

  having plural teeth on a single link · CPC title

• Y10T83/909

  Cutter assemblage or cutter element therefor [e.g., chain saw chain] · CPC title