欧美色图片玖玖视频

<form id=nPsduEOFY><nobr id=nPsduEOFY></nobr></form>

<address id=nPsduEOFY><nobr id=nPsduEOFY><nobr id=nPsduEOFY></nobr></nobr></address>

中文English

超聲波焊接原理

超聲波研磨抛光模具的原理及類型

靈科超聲波分享過很多關于超聲波塑料焊接的知識，其實超聲波不僅可以進行焊接，也可以進行研磨、抛光模具，随着超声技术和应用的不断发展，超声研磨、抛光也将会得到广泛的应用。超声波研磨的效率高，使用超声波加工的模具精度和光洁度好，保证磨具和産品质量。

一、超聲波研磨、抛光原理

超声波研磨、抛光装置如图4. 9所示。它是一部手持式超声抛光机。从图中看岀,超声波发生器 1输出高频电压於超声振动子2,振子产生机械振动，然后经变幅杆3机械放大后，传给工具头4。工具头在加压力P同时，在模具表面作高速摩擦。超声波特点是将使工件5表面微细沟槽自成机理活跃，既表现在磨具的等硬性，又可防止堵塞，既减小了摩擦系数，又提高了PV值，从而使研磨抛光效率有所提高。

二、超聲研磨抛光的幾種類型

(1)手持式超声研磨抛光，如图4. 9所示。其超声振动方向与加工件表面平衡，适用于模具表面及狭缝小孔的抛光。

(2)工件旋转的超声研磨装置如图4.10所示。超声作纵向振动，振动方向与工件旋转方向垂直。

(3)工具转动并振动的超声研磨装置如图4. 11所示。研磨过程中工件向前移动，振动方向与工件移动方向垂直。

(4)工具头旋转且作纵向振动的超声波研磨装置，如图4. 12所示。超声波电能通过超聲波換能器轉爲縱向振動，經變幅杆後傳給彎曲振動圓盤，撓性杆再將彎曲振動圓盤的彎曲振動變成縱向振動後傳給油石，進行縱向振動並旋轉進行超聲琦磨。該裝置適用于高精度，高質量、高耐磨的精密孔加工。

“超聲波模具”在生産過程中需要注意什麽？

“超聲波”鑽孔加工的應用原理

‘Oh, yes, you could. Now do just as I tell you, Alice. When you’ve eaten, we’ll talk again.’ "Not a sign of a sign! And yet I'll swear it! Do you know where she's gone?" "Go along with your doctor," said Maitrank now, in great good humour. "If you will have the goodness to call a cab I will get back to my hotel." "I am...." “Bad news?” Larry asked, climbing to the turf. Larry braced himself against the slap of the wheels into the surface water. That might offer just enough resistance to nose them in. However, it ended, as soon as Mr. Everdail had sailed on the yacht to join his wife at their lakeside camp in Maine, uncanny light, odd noises and other strange things had become evident again, as an excited local correspondent had notified the paper. Reporters, searching, and watching, had found nothing so far but the public would be informed as soon as they discovered the secret. He believed that he had no ties now, that friendships, the love of woman, and the kiss of children all had missed him, and that his, thenceforth, must be but vain regret. So far as he knew, Felipa had gone away without ever having received his letter. The man he had intrusted it to had been killed in the Aravaypa Ca?on: that he was certain of; and it never entered his head that his papers might have fallen into other hands, and the note have finally been delivered to her. She was leading the sort of life that would most quickly put him entirely out of her mind. He was taking the Washington papers, and he knew. She had gone away, not even sure that he had given her a thought since the night in the Sierra Blanca when Black River had roared through the stillness, and they had been alone in all the wild world. What a weird, mysterious, unearthly scene it had been, quite outside the probabilities of anything he had imagined or contemplated for a single minute. He had never regretted it, though. He believed in impulses, particularly his own. Yet she not only loved Cairness as much as ever, but more. Her church had the strong hold of superstition upon her, but she might have thrown it off, grown reckless of enforced conventions, and have gone to him, had not faithfulness and gratitude held her yet more powerfully. "Yes, that is she; glad to see you back, Missy," said the General, patting the cow on the back. "Take her back and give her a good feed, if you can find it, for probably she's pretty hungry." Have you never heard of AMP burning them, you silly damn fool? Her young face bowed to his neck, and suddenly his lips crept round and lay against the coolness of her cheek. She did not move, and he still walked on, the grass splashing under his feet, the rabbits scampering round him, showing their little cotton-tails in the dark. HoME 欧美色图片玖玖视频ENTER NUMBET 004www.8sing.com.cn
eyc8.net.cn
www.qt024.com.cn
heida.org.cn
www.chaopai.org.cn
www.lanxi.org.cn
10zx.org.cn
timi.org.cn
www.srmjg.com.cn
www.58927.com.cn