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US 2023/0256508 A1Published application
Method for producing a green body and method for further processing the green body to form a machining segment
AssigneeHilti Aktiengesellschaft
InventorsThorsten KLEIN, Matthaeus HOOP, Thomas BRITT, Jens STRACKE, Steven MOSELEY, Jozsef SZABO
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Abstract
Method for producing a green body for a machining segment (51) from a powdered or granular first matrix material (56), first hard material particles (57) and second hard material particles (58), the machining segment being connected by an underside (61) to a basic body of a machining tool. The machining segment (51) has a projection of the second hard material particles (58) with respect to the first matrix material (56) on the side surfaces.
Claims10
1-9. (canceled)
10:
- A method for producing a green body for a machining segment from a powdered or granular first matrix material, first hard material particles and second hard material particles, the machining segment being connected by an underside to a basic body of a machining tool, the method comprising the following steps:
- applying a lower layer of a powdered or granular supporting material different from the first matrix material;
- arranging the second hard material particles in the lower layer according to a defined second particle pattern, the second hard material particles being partially embedded in the supporting material;
- performing a sequence of a first and a second sequential step performed N times, N≥1, wherein
- in the first sequential step, a matrix layer having a first region is applied, wherein the first matrix material is applied in the first region, and
- in the second sequential step, the first hard material particles are arranged in the matrix layer according to a defined first particle pattern;
- arranging the second hard material particles in the Nth matrix layer according to the defined second particle pattern, wherein the second hard material particles are partially embedded in the first matrix material, and
- applying an upper layer of the supporting material, wherein the second hard material particles are completely covered by the supporting material.
5 more elements
11:
- The method as recited in claim 10 wherein the first hard material particle are arranged in the first matrix material according to the defined first particle pattern.
12:
- The method as recited in claim 10 wherein the matrix layer includes the first region and a second region, the supporting material being applied in the second region, and the first hard material particles being arranged in a transitional region between the first region (and the second region.
13:
- The method as recited in claim 12 wherein the supporting material applied in the second region of the matrix layer has a melting temperature higher than the sintering temperature of the first matrix material applied.
14:
- The method as recited in claim 12 wherein the supporting material applied in the second region of the matrix layer has a melting temperature lower than the sintering temperature of the first matrix material applied.
15:
- A method for forming a machining segment, the method comprising:
- further processing the green body produced by the method as recited in claim 10 to form the machining segment.
16:
- The method as recited in claim 15 wherein the further processing includes compacting the green body under the action of pressure to form a compact body and further processing the compact body to form the machining segment (51).
17:
- The method as recited in claim 16 wherein the compact body is further processed to form the machining segment by free-form sintering or hot pressing.
18:
- The method as recited in claim 15 wherein the green body is further processed to form the machining segment by free-form sintering or hot pressing.