A cutter head assembly for a wood planing machine, comprising:
- a shaft which is elongated along an axis in an axial direction, and which has two ends opposite to each other along the axis, and a mount segment that is interposed between said ends;
- a plurality of cutter-mounting sleeve modules, each having outer and inner wall surfaces opposite to each other in radial directions, said outer wall surface defining a slot which extends towards said inner wall surface to form a leading seat sidewall and a trailing opposing sidewall that are angularly spaced apart from each other by said slot, said trailing opposing sidewall having an abutment surface facing said slot, each of said cutter-mounting sleeve modules including a raised addendum which extends radially from said outer wall surface adjacent to said slot, and which has a rest wall surface extending circumferentially and towards said inner wall surface such that said rest wall surface is connected to and is co-planar with said leading seat sidewall in an abutting plane;
- a plurality of cutter modules, each having a cutting edge and an abutting edge opposite to said cutting edge, each of said cutter modules being secured to said leading seat sidewall of a respective one of said cutter-mounting sleeve modules such that said cutting edge extends beyond said outer wall surface of the respective one of said cutter-mounting sleeve modules, and said abutting edge abuts against said abutment surface when a respective one of said cutter modules is secured to said leading seat sidewall, each of said cutter modules including a central body which is interposed between said cutting edge and said abutting edge, and which has inner and outer major surfaces opposite to each other along a line that is normal to the abutting plane such that, when each of said cutter modules is secured to said leading seat sidewall, said inner major surface is brought to abut against both said leading seat sidewall and said rest wall surface so as to permit said cutting edge to extend beyond said rest wall surface;
- and
- an angularly-variable positioning mechanism including a guiding member disposed on said mount segment and extending along the axis, and
- a plurality of guided members which extend axially, which are disposed on said inner wall surface, and which are angularly displaced from one another, each of said guided members being configured to mate with said guiding member such that said cutter-mounting sleeve modules are non-rotatably retained on said mount segment along the axis, and such that, when said cutter-mounting sleeve modules are sequentially brought to be sleeved onto said mount segment along the axis, with a selected one of said guided members in each of said cutter-mounting sleeve modules matingly engaging said axially guiding member, said cutting edges on said cutter-mounting sleeve modules thus sleeved on said mount segment together define a cutting contour line that winds around said mount segment angularly and axially.