Milling tool for machining workpieces of wood, a derived timer product, a plastic material, etc.

A milling tool for machining workpieces of wood, a derived timber product, or a plastic material, said milling tool comprising:

• a support (1, 21) comprising a receiving portion (3, 23) and a cutting portion (2, 22);
• at least two exchangeable cutting tips (6, 20, 20′, 30, 30′, 33);
• said cutting portion (2, 22) having cutouts (4, 4′, 24) with a support surface (5, 25) for receiving said cutting tips (6, 20, 20′, 30, 30′, 33);
• said cutting tips (6, 20, 20′, 30, 30′, 33) connected to said cutouts (4, 4′, 24) of said cutting portion (2, 22) by at least one screw (10), respectively;
• said cutting portion (2, 22) having bores (8) extending from said support surface (5, 25) of said cutouts (4, 4′, 24) into said cutting portion (2, 22);
• said bores (8) comprising a threaded portion (18) and a threadless portion (19);
• said screws (10) threaded into said threaded portion of said bores (18) for pressing said cutting tips (6, 20, 20′, 30, 30′, 33) against said support surface (5, 25);
• said cutting tips (6, 20, 20′, 30, 30′, 33) having receiving openings (26, 26′);
• said screws (10) having a guide shaft (13) penetrating said receiving opening (26, 26′) of said cutting tips (6, 20, 20′, 30, 30′, 33) and extending into said threadless portion (19), whereby said threadless portion (19) has a tight clearance fit relative to said guide shaft (13);
• said screws (10) having a head (11) and said head (11) having a clamping surface (11′) extending parallel to said support surface (5, 25);
• said guide shaft (13) arranged adjacent to said clamping surface (11′);
• said screws (10) having at least one notch (15, 17) positioned adjacent to said guide shaft (13);
• said receiving openings (26, 26′) dimensioned such that said guide shaft (13) is received with minimal play;
• said screws (10) securing said cutting tips (6, 20, 30, 33) statically precisely in position and loaded exclusively by tensile load;
• wherein loss of frictional forces between said cutting tips (6, 20, 30, 33) and said cutouts (4, 4′, 24) results in a maximum displacement of said cutting tips (6, 20, 30, 33) by said minimal play between said guide shaft (13) and said receiving opening (26, 26′) and wherein the resulting deformation of said screws (10) occurs in a defined manner in said notch (15, 17).