Cutting knife for chip-removing cutting tools with breaking notch
AssigneeHeule, ULF
InventorHeinrich Heule
Life of this patent
Estimating the term…
Abstract
A cutting knife for difficult-to-manipulate, chip-removing cutting tools, that is replaceably held in a knife window of a rotary-driven tool shaft of a base body, in which at least one knife holder that is connected to the cutting knife over a predetermined breaking point, and that assists with manipulation, is attached to the cutting knife, and is broken away for the tool shaft to be put to use.
Claims19
A cutting knife of a size which is difficult to manipulate with a bare hand and which is adapted for use with a chip-removing cutting tool, the cutting knife adapted to be replaceably held in a knife window of a rotary-driven tool shaft of a base body of the cutting tool, wherein at least one knife holder is connected to the cutting knife over a predetermined breaking point, and is configured to be grasped by the bare hand to assist with manipulation of the cutting knife, and is further configured to be broken off of the cutting knife at the breaking point and discarded once the cutting knife has been positioned in the knife window and prior to use of the cutting knife, thereby eliminating any need for a grasping tool to manipulate the cutting knife, the cutting knife further including an indentation in an upper edge thereof and between a cutting edge of the cutting knife and the breaking point, which is adapted to receive a tip of a spring biased pin in the tool shaft for securing the cutting knife in the knife window.
Procedure for fastening a cutting knife in a chip-removing cutting tool, in which a relatively small knife of a size which is difficult to manipulate with a bare hand is held in a knife window of a tool shaft of a base body of the cutting tool, wherein the cutting knife is provided with at least one knife holder attached over a predetermined breaking point, the knife holder which serves as a manipulation aid is grasped with the bare hand to insert the cutting knife into the knife window of the tool shaft, the cutting knife is secured in the knife window with a cutting knife securing mechanism, and after the cutting knife is secured in the knife window, a short press is made on the knife holder which stresses the predetermined breaking point by bending it until it breaks and the knife holder is removed as refuse.
A method of securing a cutting knife in a chip removing cutting tool comprising the steps of:
- providing the cutting tool, the cutting tool having an axially rotary driven base body, a tool shaft secured in the base body, a radially directed knife window in the tool shaft, and a mechanism for securing the cutting knife in the knife window,
- providing the cutting knife, the cutting knife having a discardable knife holder attached thereto over a predetermined breaking point,
- grasping the knife holder with a bare hand and inserting the cutting knife into the knife window,
- actuating the mechanism for securing the cutting knife in the knife window to thereby secure the cutting knife in the knife window,
- pressing on the knife holder to stress the predetermined breaking point until the knife holder breaks off of the cutting knife, and
- discarding the knife holder.
A chip removing cutting tool and cutting knife comprising:
- an axially rotary driven base body, a tool shaft secured in the base body, a radially directed knife window in the tool shaft, and a mechanism for securing the cutting knife in the knife window,
- the cutting knife positioned in the knife window and secured in the knife window with the mechanism for securing the cutting knife in the knife window,
- the cutting knife having a discardable knife holder attached thereto over a predetermined breaking point which permits the knife holder to be grasped with a bare hand and the cutting knife to be inserted into the knife window,
- whereupon after the cutting knife is inserted into the knife window and secured in the knife window the knife holder can be pressed to stress the predetermined breaking point until the knife holder breaks off of the cutting knife, at which time the knife holder can be discarded.
Dependencies are inferred from the claim text.