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US 2004/0120778 A1Published application
Profile turning tool
AssigneeJakob Lach GmbH & Co. KG
InventorsHorst Lach, Eugen Maurer
Life of this patent
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AssigneeJakob Lach GmbH & Co. KG
InventorsHorst Lach, Eugen Maurer
Estimating the term…
The profile turning tool is used for rough-turning and dressing circumferential and flat surfaces, in particular of workpieces made of light metals. It consists of a holder (10) with a receiver (16) for a diamond cutting head (18) as well as a claw (20), which is embodied as a chip breaker, engages a longitudinal groove (26) in the holder (10) and braces the cutting head (18) by means of a tightening screw (22). The groove (26) is located directly behind the cutting head (18). In longitudinal section, its base has an arcuate, concave shape and represents a pivot bearing for the claw (20) that has a correspondingly shaped underside and is guided on the lateral walls of the groove (26). The tightening screw (22) extends in front of the center of the arc with play through a hole in the claw (20).
A profile turning tool for rough-turning and dressing circumferential and flat surfaces, in particular of workpieces made of light metals, consisting of a rod-shaped holder (10) with a receiver (16) for a cutting element (18) with a rounded cutting head, whose cutting edge (42) is made of a material such as diamonds or cubical boron nitride and extends over a circumferential angle of more than 90°, and of a claw (20), engaging a longitudinal groove (26) in the holder (10) and having a front end (32) in form of a chip breaker, which claw clamps the cutting element (18) to the holder (10) by means of a tightening screw (22) being screwed into the holder (10), characterized in that the center longitudinal axis of the cutting head (18) extends in the longitudinal direction through the groove (26), whose base has a concave form in cross section and forms a pivot bearing for the claw (20), which is convexly shaped on its underside in the engagement area and is guided on the lateral walls of the groove (26), and that ahead of the center of the convexity the tightening screw (22) extends with play through a hole (28) in the claw (20).
The turning tool in accordance with one of the preceding claims, characterized in that from a defined distance from the hole (28) on, the height of the claw (20) behind the hole (28) is at most as large as the depth of the groove (26) receiving it at the same location.
The turning tool in accordance with one of the preceding claims, characterized in that the front end (32) of the claw (20), which can be pressed against the cutting element (18), is made of hard metal and has the shape of a chip breaker.
The turning tool in accordance with one of the preceding claims, characterized in that the cutting element (18, 18′) consists only of a cutting head in the form of a cutting plate which is circular, or has at the front and the sides a cutting face (42) in the shape of an arc of a circle extending over more than 180°, and at the rear has a contact face (44) which, in a view from above, differs from the shape in the arc of a circle of the cutting edge (42).
Dependencies are inferred from the claim text.