Cutting Insert and Tool Having an Anti-Slip Arrangement

Abstract

A cutting tool and a cutting insert each include a base surface and an anti-slip arrangement. Each anti-slip arrangement includes an actuator surface and non-parallel first and second abutment surfaces, and the actuator surface of the cutting tool is a surface of a clamp of the cutting tool. The cutting insert is mounted on the cutting tool via engagement of the base surfaces thereof and the clamp is operable to bias the actuator surfaces against each other and thereby force the first and second abutment surfaces against each other, for preventing slippage of the cutting insert along the tool's base surface.

What is claimed is: 
     
         1 . A cutting insert comprising opposing insert top and base surfaces which are connected by an insert peripheral surface, at least one cutting edge, and an insert anti-slip arrangement formed adjacent to the insert base surface;
 the insert anti-slip arrangement comprising first and second insert abutment surfaces which are non-parallel to each other and to the insert base surface, and an insert actuator surface having a blunt shape and lying in an insert actuator surface plane which is oriented transverse to the insert base surface;   wherein pairs of closest points of the first and second insert abutment surfaces lie within respective common insert abutment surface planes which are parallel to the insert actuator surface plane, are a predetermined distance apart; and   at least one of the predetermined distances has a greater magnitude than another predetermined distance which is associated with a pair of points further spaced from the insert actuator surface plane.   
     
     
         2 . The cutting insert according to  claim 1 , wherein, in a bottom view of the cutting insert, each of the first and second insert abutment surfaces and the insert actuator surface face outward from the insert. 
     
     
         3 . The cutting insert according to  claim 1 , wherein each pair of points of the first and second insert abutment surfaces which are closer to the insert actuator surface plane than another pair of points, have a predetermined distance of greater magnitude than the latter pair of points. 
     
     
         4 . The cutting insert according to  claim 1 , wherein, in a bottom view of the cutting insert, the first and second insert abutment surfaces extend at an acute angle to each other. 
     
     
         5 . The cutting insert according to  claim 1 , wherein the first and second insert abutment surfaces and the insert actuator surface extend in a direction away from the insert top surface. 
     
     
         6 . The cutting insert according to  claim 1 , wherein the insert actuator surface and/or the first and second insert abutment surfaces of the cutting insert are perpendicular to the insert base surface or are at least partially slanted in a downward-outward direction. 
     
     
         7 . The cutting insert according to  claim 1 , wherein the insert actuator surface and the first and second insert abutment surfaces are formed on a single protuberance. 
     
     
         8 . The cutting insert according to  claim 1 , wherein the insert actuator surface has a curvature which is only apparent in a magnified view 
     
     
         9 . The cutting insert according to  claim 1 , further comprising an insert cutting plane which extends perpendicular to the insert base surface and an insert longitudinal plane, the insert longitudinal plane extending longitudinally through the cutting insert and perpendicular to the insert base surface; wherein, in a bottom view of the cutting insert, the insert cutting plane theoretically divides the cutting insert into imaginary first and second insert halves; wherein, in a bottom view of the cutting insert, the first and second insert abutment surfaces are at least partially located at the first insert half and the insert actuator surface is located at the second insert half. 
     
     
         10 . The cutting insert according to  claim 1 , wherein, in a bottom view of the cutting insert, the insert anti-slip arrangement is asymmetric about an insert longitudinal plane. 
     
     
         11 . The cutting insert according to  claim 1 , wherein the insert base surface extends along the entire insert peripheral surface. 
     
     
         12 . The cutting insert according to  claim 1 , wherein a first insert base width of the insert base surface which extends from, and perpendicular to, the first insert abutment surface, can be greater than a second insert base width which extends from, and perpendicular to, the second insert abutment surface. 
     
     
         13 . The cutting insert according to  claim 1 , further comprising an additional insert anti-slip arrangement. 
     
     
         14 . A tool having a cutting direction and comprising: an insert seating region comprising a tool base surface, tool inner and peripheral regions located on opposing sides of the insert seating region, the cutting direction being defined as extending from the tool inner region towards the tool peripheral region, and a tool anti-slip arrangement;
 the tool anti-slip arrangement comprising first and second tool abutment surfaces formed adjacent to the tool base surface and being non-parallel to each other and to the tool base surface, and a clamp located at the tool inner region and comprising a tool actuator surface lying in a tool actuator surface plane which is oriented transverse to the tool base surface;   wherein pairs of closest points of the first and second tool abutment surfaces lie within respective common tool abutment surface planes which are parallel to the tool actuator surface plane, are a predetermined distance apart;   at least one of the predetermined distances has a greater magnitude than another predetermined distance which is associated with a pair of points further spaced from the tool actuator surface plane; and   the clamp is configured for force application in the cutting direction via the tool actuator surface.   
     
     
         15 . The tool according to  claim 14 , wherein the tool actuator surface has a blunt shape. 
     
     
         16 . The tool according to  claim 14 , wherein the force application is in a direction parallel to the tool base surface. 
     
     
         17 . The tool according to  claim 14 , wherein the clamp and/or tool is configured for linear motion of the clamp. 
     
     
         18 . The tool according to  claim 17 , wherein the linear motion of the clamp is in a direction transverse to the cutting direction. 
     
     
         19 . The tool according to  claim 14 , wherein the tool is formed with a track which is bounded by an inner wall of the tool, the track and clamp being configured for continuous contact of the inner wall and clamp at each position thereof. 
     
     
         20 . The tool according to  claim 14 , wherein each pairs of points of the first and second tool abutment surfaces which are closer to the tool actuator surface plane than another pair of points of the first and second tool abutment surfaces, have a predetermined distance of greater magnitude than the latter pair of points. 
     
     
         21 . The tool according to  claim 14 , wherein the first and second tool abutment surfaces and the tool actuator surface are recessed into the insert seating region. 
     
     
         22 . The tool according to  claim 14 , wherein the first and second tool abutment surfaces are formed in a single tool recess. 
     
     
         23 . The tool according to  claim 14 , wherein a first tool base width of the tool base surface which extends from, and perpendicular to, the first tool abutment surface, can be greater than a second tool base width which extends from, and perpendicular to, the second tool abutment surface. 
     
     
         24 . A tool assembly comprising in combination a tool configured for cutting in a cutting direction and a cutting insert mounted to the tool: the tool comprising an insert seating region comprising a tool base surface, tool inner and peripheral regions located on opposing sides of the insert seating region, the cutting direction being defined as extending from the tool inner region towards the tool peripheral region, and a tool anti-slip arrangement;
 the tool anti-slip arrangement comprising first and second tool abutment surfaces formed adjacent to the tool base surface and being non-parallel to each other and to the tool base surface, and a clamp located at the tool inner region and comprising a tool actuator surface which is oriented transverse to the insert base surface;   the cutting insert comprising opposing insert top and base surfaces which are connected by an insert peripheral surface, at least one cutting edge, and an insert anti-slip arrangement formed adjacent to the insert base surface   the insert anti-slip arrangement comprising first and second insert abutment surfaces which are non-parallel to each other and to the insert base surface, and an insert actuator surface which is oriented transverse to the insert base surface;   wherein: the cutting insert and the tool are configured for a position in which the insert base surface contacts the tool base surface; and   the clamp is configured to bias the tool actuator surface against the insert actuator surface which consequently biases the first and second insert abutment surfaces against the first and second tool abutment surfaces for preventing slippage of the cutting insert along the tool base surface.   
     
     
         25 . The tool assembly according to  claim 24 , wherein the tool anti-slip arrangement and the insert anti-slip arrangement are configured to prevent motion of the cutting insert in a plane parallel with the tool base surface. 
     
     
         26 . The tool assembly according to  claim 24 , wherein the tool further comprises a biasing arrangement configured to bias the insert base surface against the tool base surface and the biasing arrangement is configured to allow slippage of the cutting insert along the tool base surface. 
     
     
         27 . The tool assembly according  claim 24 , wherein the only surfaces of the tool which contact a periphery of the cutting insert are the tool actuator surface and the first and second tool abutment surfaces. 
     
     
         28 . The tool assembly according to  claim 24 , wherein the only surfaces of the tool which contact the cutting insert are the tool actuator surface, the tool base surface and the first and second tool abutment surfaces. 
     
     
         29 . The tool assembly according to  claim 24 , wherein: pairs of closest points of the first and second tool abutment surfaces lie within respective common tool abutment surface planes which are parallel to a tool actuator surface plane, are a predetermined distance apart; at least one of the predetermined distances has a greater magnitude than another predetermined distance which is associated with a pair of points further spaced from the tool actuator surface plane; and pairs of closest points of the first and second insert abutment surfaces lie within respective common insert abutment surface planes which are parallel to an insert actuator surface plane, are a predetermined distance apart; and at least one of the predetermined distances has a greater magnitude than another predetermined distance which is associated with a pair of points further spaced from the insert actuator surface plane. 
     
     
         30 . The tool assembly according to  claim 24 , wherein the tool actuator surface and the insert actuator surface are both blunt. 
     
     
         31 . The tool assembly according to  claim 30 , wherein one of the tool actuator surface and the insert actuator surfaces is flat, and the other is curved. 
     
     
         32 . A method of clamping a cutting insert to a tool: the tool comprising an insert seating region comprising a tool base surface, tool inner and peripheral regions located on opposing sides of the insert seating region, and a tool anti-slip arrangement; the tool anti-slip arrangement comprising first and second tool abutment surfaces formed adjacent to the tool base surface and being non-parallel to each other and to the tool base surface, and a clamp located at the tool inner region and comprising a tool actuator surface which is oriented transverse to the tool base surface; the cutting insert comprising opposing insert top and base surfaces which are connected by an insert peripheral surface, at least one cutting edge, and an insert anti-slip arrangement formed adjacent to the insert base surface; the insert anti-slip arrangement comprising first and second insert abutment surfaces which are non-parallel to each other and to the insert base surface, and an insert actuator surface which is oriented transverse to the insert base surface; wherein the method comprises:
 a. mounting the cutting insert on the tool in a position in which the insert base surface contacts the tool base surface; and   b. biasing the clamp's tool actuator surface against the insert actuator surface, thereby biasing the first and second insert abutment surfaces respectively against the first and second tool abutment surfaces for preventing slippage of the cutting insert along the tool base surface.   
     
     
         33 . The method of clamping according to  claim 32 , wherein said biasing is in a cutting direction defined as extending from the tool inner region towards the tool peripheral region.