When zirconia ceramics are sintered and formed, tensile specimens can be tested for their toughness. What conditions should be met in order to meet the needs of tensile specimens? Below Pintejin Ceramics Factory will give you an analysis.
The shape of the zirconia ceramic tensile test piece and the shape of the blank are shown in Figure 3-18. In order to meet the needs of the tensile test, the tensile test piece should meet the following requirements:
- ①The surface of the tensile test piece should have a sufficiently low surface roughness
- ②The arc part should have an accurate profile
- ③ Tensile specimens should ensure axisymmetric accuracy.
The metal bond diamond grinding wheel with a particle size of 100 is relatively coarser for fine grinding ceramics, but for diamond and fine ceramics specimens. In addition to brittle collapse, there is also obvious plastic deformation when the zirconia ceramics are compacted. This also makes it easy to obtain a lower surface roughness when precision grinding oxide ceramic specimens. As can be seen from Figure 3-19 and Figure 3-20, when the precision grinding of zirconia ceramics is carried out with low workpiece speed and small grinding wheel cutting depth Sharpening, low surface roughness can be obtained.
Precise parameters: workpiece speed 3 ~ 5mmin-1, grinding wheel cutting depth O0.005 ~ 0.010mm, grinding wheel speed 18ms1. In this way, the surface roughness R value of the test piece can be controlled within 0.16pm. Resin bond diamond grinding wheel for shape grinding.
For the forming and grinding of the arc part of the ceramic tensile test piece, the first problem to be solved is to dress the contour of the diamond sand accurately. Therefore, a new type of forming and dressing device is proposed, as shown in Figure 3-21. The structure of this shaping and dressing device is very simple. It consists of a silicon carbide grinding wheel driven by a motor and a rocker arm equipped with an electroplated diamond sample block.
Semiconductor ceramic manufacturers use electroplated diamond samples to dress the silicon carbide grinding wheel, and then use the repaired silicon carbide grinding wheel to dress the Jinyu stone grinding wheel to obtain the desired profile. The relationship between the electroplated diamond sample block, silicon carbide grinding wheel, diamond grinding wheel and the basic profile of the workpiece is shown in Figure 3-22.
Pintejin Ceramics Factory uniformly uses diamond grinding wheels to grind and cut zirconia ceramics, perform ceramic finishing, and then deliver the precision ceramic parts with excellent quality and precision to the customer’s hands.
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