A method for producing a replaceable cutting head is described. The replaceable cutting head is manufactured by extruding a blank. During extrusion of the blank, a number of helical coolant channels and a number of helical flutes are simultaneously formed. After extrusion, the flutes have a first angle of twist (D1), and the coolant channels have a second angle of twist (D2). After extrusion, the blank is sintered and then reworked to selectively adjust the first angle of twist (D1) and the pitch of the flutes. The method produces an endless blank that is capable of being parted off to a desired length without any sacrificial allowance, which provides significant material and cost savings as compared to conventional methods.

A method for producing a replaceable cutting head is described. The replaceable cutting head is manufactured by extruding a blank. During extrusion of the blank, a number of helical coolant channels and a number of helical flutes are simultaneously formed. After extrusion, the flutes have a first angle of twist (D1), and the coolant channels have a second angle of twist (D2). After extrusion, the blank is sintered and then reworked to selectively adjust the first angle of twist (D1) and the pitch of the flutes. The method produces an endless blank that is capable of being parted off to a desired length without any sacrificial allowance, which provides significant material and cost savings as compared to conventional methods.

Provided are an unequal-channel angular self-bending extrusion die and a method for designing and manufacturing the same and extrusion method thereof and includes following steps: designing a symmetrical streamlined extrusion die based on sine function; making the medial axis of the die cavity of the symmetrical streamlined extrusion die twisted and deformed on a certain plane; establishing the die cavity wall surface equation of the unequal-channel angular self-bending extrusion die; setting a working belt structure downstream the die cavity of the unequal-channel angular self-bending extrusion die.

Provided are an unequal-channel angular self-bending extrusion die and a method for designing and manufacturing the same and extrusion method thereof and includes following steps: designing a symmetrical streamlined extrusion die based on sine function; making the medial axis of the die cavity of the symmetrical streamlined extrusion die twisted and deformed on a certain plane; establishing the die cavity wall surface equation of the unequal-channel angular self-bending extrusion die; setting a working belt structure downstream the die cavity of the unequal-channel angular self-bending extrusion die.

A method for producing a cutting head is specified. The latter is manufactured from a blank, which in turn is manufactured by means of extrusion. During extrusion, a number of coolant channels as well as a number of flutes are formed, wherein the coolant channels and the flutes are in each case formed helically during extrusion. After extrusion, the flutes have a pitch that is adjusted by grinding the flutes to a finished dimension. The method is particularly material-saving. A corresponding cutting head is moreover specified.

A method for producing a cutting head is specified. The latter is manufactured from a blank, which in turn is manufactured by means of extrusion. During extrusion, a number of coolant channels as well as a number of flutes are formed, wherein the coolant channels and the flutes are in each case formed helically during extrusion. After extrusion, the flutes have a pitch that is adjusted by grinding the flutes to a finished dimension. The method is particularly material-saving. A corresponding cutting head is moreover specified.

Provided are an unequal-channel angular self-bending extrusion die and a method for designing and manufacturing the same and extrusion method thereof and includes following steps: designing a symmetrical streamlined extrusion die based on sine function; making the medial axis of the die cavity of the symmetrical streamlined extrusion die twisted and deformed on a certain plane; establishing the die cavity wall surface equation of the unequal-channel angular self-bending extrusion die; setting a working belt structure downstream the die cavity of the unequal-channel angular self-bending extrusion die.

Provided are an unequal-channel angular self-bending extrusion die and a method for designing and manufacturing the same and extrusion method thereof and includes following steps: designing a symmetrical streamlined extrusion die based on sine function; making the medial axis of the die cavity of the symmetrical streamlined extrusion die twisted and deformed on a certain plane; establishing the die cavity wall surface equation of the unequal-channel angular self-bending extrusion die; setting a working belt structure downstream the die cavity of the unequal-channel angular self-bending extrusion die.

A method of producing a die or a die material for extrusion of aluminum profiles, comprising the steps of: providing a first powder, which is a steel powder having the following composition in weight %: C<1.2; Co 6.0-15; Mo 5.0-11.0; Mn 0-1.5; Si 0-1.25; Cr 2-8; Ni 0.5-6.0; P<0.1; balance Fe and unavoidable impurities, said steel powder having a mean particle size of 5-100 um, providing a second powder containing one or more grain growth inhibitors selected among the group comprising carbides, oxides and nitrides, milling at least the steel powder to a mean crystallite size of 20-100 nm, mixing the first and second powders to a powder mixture, wherein the content of the second powder in the powder mixture is in the range of 0.05-2.5 weight %, forming a green body of the powder mixture, and sintering the green body by discharge plasma sintering (SPS), at a temperature in the range of 950-1200 C.

A method of producing a die or a die material for extrusion of aluminum profiles, comprising the steps of: providing a first powder, which is a steel powder having the following composition in weight %: C<1.2; Co 6.0-15; Mo 5.0-11.0; Mn 0-1.5; Si 0-1.25; Cr 2-8; Ni 0.5-6.0; P<0.1; balance Fe and unavoidable impurities, said steel powder having a mean particle size of 5-100 um, providing a second powder containing one or more grain growth inhibitors selected among the group comprising carbides, oxides and nitrides, milling at least the steel powder to a mean crystallite size of 20-100 nm, mixing the first and second powders to a powder mixture, wherein the content of the second powder in the powder mixture is in the range of 0.05-2.5 weight %, forming a green body of the powder mixture, and sintering the green body by discharge plasma sintering (SPS), at a temperature in the range of 950-1200 C.