Broaching tool, in particular keyway broaching tool
AssigneeHartmetall-Werkzeugfabrik Paul Horn GmbH
InventorHans Schaefer
Life of this patent
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Abstract
The invention relates to a broaching tool, in particular a keyway broaching tool, comprising a holder which defines a longitudinal axis and has a shank, extending in the longitudinal direction, as support for a cutting body which can be fixed in a seat of the shank by means of a clamping device. The seat has a passage which is at a distance from the free end of the shank and extends transversely to the longitudinal axis and the inside of which forms guide surfaces for bearing surfaces of the cutting body, which can be inserted into the passage in an insertion direction. An end-position limit for the inserted cutting body is formed on guide surfaces and on associated bearing surfaces. The clamping device produces a force component on the cutting body which presses the latter against the end-position limit.
Claims17
A broaching tool comprising:
- a cutting body;
- a holder which defines a longitudinal axis and has a shank, extending in the longitudinal direction, as support for the cutting body;
- a clamping device for fixing the cutting body in a seat of the shank;
- wherein the seat has a passage which is at a distance from the free end of the shank and extends transversely to the longitudinal axis and the inside of which forms guide surfaces for bearing surfaces of the cutting body, which can be inserted into the passage in an insertion direction,
- wherein an end-position limit for the inserted cutting body is formed on guide surfaces and on associated bearing surfaces, and
- wherein the clamping device produces a force component on the cutting body which presses the latter against the end-position limit, wherein to form the end-position limit, at least one surface part projecting from a bearing surface is provided on the cutting body, said surface part forming a stop surface which, when the cutting body is inserted, comes to bear against a step, forming a counter-stop, of a guide surface of the passage.
A cutting body for a broaching tool, said broaching tool comprising a holder which defines a longitudinal axis and has a shank, extending in the longitudinal direction, as support for the cutting body, a clamping device for fixing the cutting body in a seat of the shank, wherein the seat has a passage which is at a distance from the free end of the shank and extends transversely to the longitudinal axis and the inside of which forms guide surfaces for bearing surfaces of the cutting body, which can be inserted into the passage in an insertion direction, wherein an end-position limit for the inserted cutting body is formed on guide surfaces and on associated bearing surfaces, and wherein the clamping device produces a force component on the cutting body which presses the latter against the end-position limit, wherein the cutting body comprises a plate-like parent member which has at least one extension forming a cutting edge, and comprising a hump projecting on a wide side of the plate-like parent member and having a step which forms a stop surface for a counter-stop in the seat of the tool holder.
A cutting body for a broaching tool, said broaching tool comprising a holder which defines a longitudinal axis and has a shank, extending in the longitudinal direction, as support for the cutting body, a clamping device for fixing the cutting body in a seat of the shank, wherein the seat has a passage which is at a distance from the free end of the shank and extends transversely to the longitudinal axis and the inside of which forms guide surfaces for bearing surfaces of the cutting body, which can be inserted into the passage in an insertion direction, wherein an end-position limit for the inserted cutting body is formed on guide surfaces and on associated bearing surfaces, and wherein the clamping device produces a force component on the cutting body which presses the latter against the end-position limit, wherein the cutting body comprises a plate-like parent member which has at least one extension forming a cutting edge and has a sloping surface on a narrow side, which sloping surface, for the end-position limit, can be brought to bear against a sloping surface formed in the seat of the tool holder.
A broaching tool comprising:
- a cutting body;
- a holder which defines a longitudinal axis and has a shank, extending in the longitudinal direction, as support for the cutting body;
- a clamping device for fixing the cutting body in a seat of the shank;
- wherein the seat has a passage which is at a distance from the free end of the shank and extends transversely to the longitudinal axis and the inside of which forms guide surfaces for bearing surfaces of the cutting body, which can be inserted into the passage in an insertion direction,
- wherein an end-position limit for the inserted cutting body is formed on guide surfaces and on associated bearing surfaces, and
- wherein the clamping device produces a force component on the cutting body which presses the latter against the end-position limit, wherein the cutting body has a parent member in the form of a plate which is to be accommodated in the passage of the shank and whose wide sides opposite one another form bearing surfaces for the guide surfaces of the passage wherein the clamping device has a clamping screw which passes through a hole in the parent member of the cutting body, said hole running perpendicularly to the wide sides, defining parallel planes, of said parent member, and in that, for the clamping screw, a tapped hole is provided on the shank in one of the guide surfaces of the passage.
Dependencies are inferred from the claim text.