US 7,611,311 B2
Tool for chip removing machining as well as a part and threaded joint therefor
Isak Kakai, Gävle (Sweden); Ralf Lehto, Gävle (Sweden); Kenneth Larsson, Sandviken (Sweden); and Magnus Örtlund, Stockholm (Sweden)
Assigned to Sandvik Intellectual Property AB, Sandviken (Sweden)
Filed on Apr. 19, 2007, as Appl. No. 11/785,742.
Claims priority of application No. 0600875 (SE), filed on Apr. 20, 2006.
Prior Publication US 2007/0248421 A1, Oct. 25, 2007
Int. Cl. B23C 5/22 (2006.01); B23B 31/11 (2006.01); B23B 51/00 (2006.01)
U.S. Cl. 407—54  [408/233; 408/226; 408/239 R; 279/8] 10 Claims
OG exemplary drawing
 
1. A tool for chip removing machining, comprising:
a first part and a second part oriented along a common center axis; and
a threaded joint detachably connecting the first and second parts to each other, the threaded joint including:
a female thread disposed in a mouth of a hollow space in the first part; and
a male thread disposed on a free end of a male-like pin on the second part; wherein
each of the male and female threads includes a helicoidal ridge having a profile shape being defined by a top and two flanks, which delimit a likewise helicoidal groove having a bottom,
a first flank of the male thread ridge facing away from the free end of the pin and a first flank of the female thread ridge facing away from the mouth of the hollow space pressing against one another during screwing-in of the pin into the hollow space,
a second flank of the male thread ridge facing the free end of the pin and a second flank of the female thread ridge facing the mouth pressing against one another during unscrewing of the pin out of the hollow space,
the first flanks of the male and female thread ridges being inclined in relation to the center axis at a first angle that is smaller than a second angle at which the second flanks are inclined in relation to the center axis,
the second flank of the male thread ridge facing the free end of the pin and the second flank of the female thread ridge facing the mouth being spaced from one another during screwing-in of the pin into the hollow space, and
the first flank of the male thread ridge facing away from the free end of the pin and the first flank of the female thread ridge facing away from the mouth of the hollow space being spaced from one another during unscrewing of the pin out of the hollow space.