Method and a device for manufacturing a cutting insert green body
AssigneeSeco Tools AB
InventorDirk Sterkenburg
Life of this patent
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Abstract
A device for manufacturing a cutting insert green body by compacting a powder includes a die having an upper die part and a lower die, an upper punch and a lower punch, at least one of which is moveable along a pressing axis in relation to the die. The upper and lower die parts, when joined, define a die cavity that defines the shape of the green body to be formed by the compaction. At least one of the lower and upper die part has a pressing bore extending from the cavity for receiving the lower and upper punch. The upper die part has an upper surface that, at least in one direction, extends rectilinearly, and the upper die part has an upper opening in the upper surface, through which the upper punch is arranged to be forwarded into the cavity.
Claims14
A method of compacting a powder into a cutting insert green body, such that said cutting insert green body obtains a barrel-shape having a parting line on an outer peripheral surface thereof, which is at least partially non-perpendicular to a pressing axis along which said compacting is performed, said method comprising the steps of:
- providing a compaction tool including a die having an upper die part, a lower die part, an upper punch and a lower punch, wherein the upper and lower die parts, when joined together, define a die cavity that is delimited by an inner peripheral surface that defines the shape of the outer peripheral surface of the barrel-shaped green body to be formed by said compaction;
- providing at least one of the lower die part and the upper die part with a pressing bore extending from said die cavity, for receiving the lower punch or the upper punch in connection with said compacting;
- providing the lower die part with an upper inner edge that extends along a line defining the parting line of the green body;
- providing the upper die part with a lower inner edge that extends along a line defining the parting line of the green body;
- providing the upper die part with an upper surface that, at least in one direction, extends rectilinearly;
- providing the upper die part with an upper opening in said upper surface, through which the upper punch is arranged to be forwarded into said cavity;
- positioning the upper die part above the lower die part such that the lower inner edge of the upper die part is contiguously arranged in relation to the upper inner edge of the lower die part;
- positioning the upper punch in a retracted position relative the upper opening of the upper die part;
- filling powder into the die through said upper opening in the upper surface of the upper die part;
- compacting the powder by forwarding at least the upper punch towards said cavity;
- retracting the upper punch;
- and
- exposing the green body by retracting the upper die part from the lower die part.
A device for manufacturing a cutting insert green body by compacting a powder, said device comprising:
- a die including an upper die part and a lower die part that are separable from each other, an upper punch, and a lower punch, at least one of which is moveable along a pressing axis in relation to the die, wherein the upper and lower die parts, when joined, define a die cavity that is delimited by an inner peripheral surface that defines the shape of the outer peripheral surface of the green body to be formed by said compaction, and wherein said inner peripheral surface of the die cavity is arranged such that the green body obtains a barrel-shape having a parting line on the outer peripheral surface thereof which at least partially is non-perpendicular to said pressing axis, and wherein at least one of the lower die part and the upper die part has a pressing bore extending from said cavity, for the lower punch and upper punch respectively to be received in the device;
- the lower die part having an upper inner edge that extends along a line defining the parting line of the green body;
- the upper die part having a lower inner edge that extends along a line defining the parting line of the green body;
- the upper die part having an upper surface that, at least in one direction, extends rectilinearly;
- and
- the upper die having an upper opening in said upper surface, through which the upper punch is arranged to be forwarded into said cavity.
Dependencies are inferred from the claim text.