| 摘要: |
| 分别采用Sn-40Pb,Sn-3.5Ag和Sn-52In钎料对PZT8压电陶瓷和铜定子弹性体进行了钎焊试验,对比分析了3种钎料钎焊定子的振动性能以及钎焊压力对振动性能的影响. 结果表明,采用Sn-52In钎料,配合松香类有机钎剂,在峰值温度141 ℃,回流时间116 s,钎焊压力38.26~114.78 kPa内的工艺条件下,钎焊形成定子的振动性能最好;在电压峰峰值80 V的激励下,钎焊定子的振幅为2.5 μm,达到了胶粘定子的振动水平;钎焊接头的抗剪强度达到6.88 MPa,超过了超声电机定子对力学性能(≥5 MPa)应用的要求,有望解决胶粘工艺胶接层老化的问题,从而提高超声电机的使用寿命. |
| 关键词: 钎焊 回流曲线 抗剪强度 压电陶瓷 超声电机 |
| DOI：10.12073/j.hjxb.20150904 |
| 分类号: |
| 基金项目:中央高校基本科研业务费专项资金资助项目;江苏高校优势学科建设工程资助项目(PAPD);江苏科技大学先进焊接技术省级重点实验室资助项目(JSAWT-14-04) |
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| Soldering of piezoelectric ceramics to copper stator elastomer for ultrasonic motor |
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LI Zhiqiang1, XUE Songbai1, DING Qingjun2, ZHAO Chunsheng2, YIN Yucong2
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1.College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2.State Key Lab of Mechanics and Control for Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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| Abstract: |
| Three kinds of solders, Sn-40Pb, Sn-3.5Ag and Sn-52In, were respectively used to join PZT8 piezoelectric ceramics and copper stator elastomer to test the vibration performance of different stators and analyze the effect of soldering pressure. The results show that with peak reflow temperature of 141 ℃, reflux time of 90 s and soldering pressure of 38.26-114.78 kPa, the stators joined with Sn-52In solder accompanying with rosin organic flux FS113A showed the best vibration performance. Under the excitation voltage whose peak-to-peak value was 80 V, the amplitude of the stators was 2.5 μm, which could reach the level of vibration of adhesive stator. The shear strength of soldered joint reached 6.88 MPa, exceeding the practical requirement of ultrasonic motor (≥5 MPa). It is expected to solve the aging problem of adhesive layer and thereby improve the service life of ultrasonic motor. |
| Key words: soldering reflow profile shear strength piezoelectric ceramics ultrasonic motor |
