METHOD OF MANUFACTURING A CERAMIC SURGICAL INSTRUMENT

Abstract

The invention relates to a method of manufacturing a surgical instrument having a rotatable shaft 2 and a working part 1 disposed thereon, the working part having at least one cutting edge, wherein the shaft 2 and the working part 1 are made of oxide ceramics, characterized in that for the manufacturing of the contour of the instrument, a rough grinding using a grinding tool having a grain size between 40 μm and 110 μm is performed, and subsequently, a fine grinding of the cutting edges using a grinding tool having a grain size between 20 μm and 50 μm performed.

Description

In the following, the invention is described on the basis of an embodiment in combination with the drawing, in which:

FIG. 1 shows a schematic view of a semi-finished part or basic material,

FIG. 2 shows a state in which a shaft is rough-ground,

FIG. 3 shows a state in which a working part/head is rough-ground,

FIG. 4 shows a state in which the head/working part is finished, and

FIG. 5 shows a state in which the shaft end is finished.

FIG. 1 shows a cylindrical basic material which was rough-ground with respect to its outer diameter and its end dimensions. In the state shown in FIG. 2, the working part 1, which was already processed in FIG. 1 with respect to its outer diameter, is clamped to finish or fine-ground the shaft 2.

In the state shown in FIG. 3, a calibration or pre-processing of the head/working part 1 is performed. In the subsequent production step, the shaft 2 is clamped, while the cutting edges at the working part/head 1 are finished. According to FIG. 5, the end of the shaft 2 is subsequently processed in order to produce the corresponding clamping portion.

Claims

1. A method of manufacturing a surgical instrument having a rotatable shaft (2) and a working part (1) disposed thereon, the working part having at least one cutting edge, wherein the shaft (2) and the working part (1) are made of oxide ceramics, wherein for the manufacturing of the contour of the instrument, a rough grinding using a grinding tool having a grain size between 40 μm and 110 μm is performed, and subsequently, a fine grinding of the cutting edges using a grinding tool having a grain size between 20 μm and 50 μm performed.

2. The method of claim 1, wherein a cutting speed between 30 m/sec and 70 m/sec is selected.

3. The method of claim 1, wherein a feed rate of the grinding tool between 1 mm/min and 10 mm/min is selected.

4. The method of claim 1, wherein a grinding tool having diamond grains as abrasive particles is used.

5. The method of claim 4, wherein a grinding tool is used, in which the grinding grains are bound by a sintered metal bond.

6. The method of claim 4, wherein a grinding tool is used, in which the grinding grains are bound by a ceramic bond.

7. The method of claim 4, wherein a grinding tool is used, in which the grinding grains are bound by a resin bond.

8. The method of claim 1, wherein at first the shaft (2) and subsequently the working part (1) with the cutting edges are formed from a blank.

9. The method of claim 1, wherein at first the working part (1) with the cutting edges and subsequently the shaft (2) are formed from a blank.

10. The method of claim 1, wherein at first the contour of the working part (1) and subsequently the cutting edges are formed.

11. The method of claim 1, wherein the cutting edges are completely ground in one production step.

12. The method of claim 1, wherein the cutting edges are at first rough-ground and then finished.

13. The method of claim 2, wherein a feed rate of the grinding tool between 1 mm/min and 10 mm/min is selected.