| 摘要 |
A push test fixture having a cradle and a load pin is provided along with a test sample that reasonably represents the strength and quality of the original welds that hold the wrap wires and axial wires of the sample together. The test sample is placed in the push test fixture such that a particular weld on the test sample is aligned between the cradle and the load pin. A load is applied through the weld using the load pin, and a strength property such as the ultimate strength or the yield strength of the weld is determined. The cradle helps maintain the original, as-wrapped curvature of the wrap wire. The test samples can come, for example, from direct wrap filters or wire-wrap jackets. The strength property can be determined for at least every third wrap wire of the test sample. |
