A BURNING OR EARTHING TOOL CONTAINING AN INSERT AND A RING OF A CEMENTED TUNGSTEN CARBIDE, A MACHINE FOR REMOVING MATERIAL, INCLUDING SUCH A TOOL AND A METHOD FOR MANUFACTURING THESE TAKE

摘要

1. A chipping or digging tool (102) comprising a housing (104) having a mounting end (106) and a working end (108), a supporting surface (112) at the working end (108), including a cavity (114) and axially protruding side walls (116), made in one piece with the body (104), an insert (120) fixed in the cavity (114), containing a tip (122) on the axially most front end (124), a conical front surface (126), a side surface (128) and a transition edge (130) at the intersection of the front surface (126) and the side surface (128), and a ring (140) located radially outside the protruding side walls (116), and the ring (140) is made of material, having a higher hardness compared to the tool body (104) (102),! characterized in that the axial position of the transition edge (130) and the axial position of the axially most front surface (118) of the side walls (116) are essentially the same. ! 2. The tool according to claim 1, characterized in that the axially most rear surface (160) of the insert (120) is located at an axial distance L ′ from the tip (122) of the insert (120), and the axially most front surface (142) of the ring (140) ) is located at an axial distance D ′ from the tip (122) of the insert (120), where 0.5L′≤D′≤0.9L ′, preferably 0.5L′≤D′≤0.8L ′. ! 3. The tool according to claim 2, characterized in that the axially most rear surface (156) of the ring (140) is located at an axial distance d ′ from the tip (122) of the insert (120), where d ′ is greater than D ′ and d ′ Is smaller than L ′, and the ring (140) is the radially outermost part of the tool (102) in the interval between D ′ and d ′. ! 4. The tool according to any one of claims 1 to 3, characterized in that the radial thickness of the side walls (116) is max