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在制造SBT声波测井仪极板时,有关换能器的精度、密封平衡盖板的激光焊接质量、极板骨架的数控加工质量以及极板外圆弧面喷涂工艺均存在一些问题。为此,对SBT声波测井仪极板的制造工艺进行分析,得到如下结论:换能器必须采用性能稳定的压电片,保证其频率的稳定性;密封平衡盖板要保证补偿膜片的平整度以及膜片与盖板焊接环面的配合公差,并选择合适的激光焊接参数焊接,确保膜片焊接的密封性;极板骨架的制造,须准确计算精密铸造模具的收缩余量,保证铸件外形尺寸;采用成型刀具加工环形空腔密封面,保证极板的密封性能;膜片与盖板焊接环面的间隙为0～0.05mm,高压插针密封圆环面与螺纹孔同轴度公差小于Φ0.02mm,极板两端环形空腔近端距离控制在(306.9±0.1)mm。
There are some problems with the accuracy of the transducers, the laser welding quality of the sealing plate, the CNC machining quality of the plate skeleton and the spraying process of the outer arc surface of the plate when manufacturing the SBT sonotrode plate. To this end, SBT sonic logging tool manufacturing process analysis, the following conclusions: The transducer must be stable performance of the piezoelectric film, to ensure the stability of its frequency; sealed balance cover plate to ensure the compensation Flatness and diaphragm and cover welding torus with the tolerance, and select the appropriate laser welding parameters welding, diaphragm seal to ensure the welding; plate skeleton manufacturing, precision casting mold to be accurate calculation of shrinkage margin, to ensure Casting dimensions; the use of molding tool processing ring cavity sealing surface, to ensure the sealing performance of the plate; diaphragm and cover welding ring surface clearance of 0 ~ 0.05mm, high-pressure pin sealing torus coaxial with the threaded hole Tolerance is less than Φ0.02mm, the distance between the proximal ends of annular cavity at both ends of the plate is controlled at (306.9 ± 0.1) mm.