{"id":9058,"date":"2020-06-10T08:17:00","date_gmt":"2020-06-10T00:17:00","guid":{"rendered":"\/\/m.letratesoro.com\/?p=9058"},"modified":"2024-01-28T20:56:18","modified_gmt":"2024-01-28T12:56:18","slug":"pih-solder-volume-calculation","status":"publish","type":"post","link":"\/\/m.letratesoro.com\/2020\/06\/pih-solder-volume-calculation\/","title":{"rendered":"\u4e00\u5716\u8aaa\u660eSMT\u901a\u5b54\u56de\u6d41\u710a(PIH)\u88fd\u7a0b\u7684\u5370\u5237\u710a\u932b\u91cf\u5982\u4f55\u8a08\u7b97"},"content":{"rendered":"

<\/p>\n

\u6700\u8fd1\u770b\u5230\u6709\u7db2\u53cb\u983b\u983b\u8a62\u554f\u95dc\u65bc\u901a\u5b54\u56de\u6d41\u710a(ROT, Reflow Of Through hole)\u6216\u901a\u5b54\u932b\u818f(PIH, Paste in Hole)<\/a>\u7684\u901a\u5b54\u586b\u6eff\u932b\u818f\u91cf\u9700\u6c42\u8a08\u7b97\u516c\u5f0f\u3002\u7576\u7136\u672c\u6587\u8aaa\u660e\u7684\u662f\u5047\u8a2d\u7406\u60f3\u72c0\u6cc1\u4e0b\u7684\u710a\u932b\u8207\u932b\u818f\u9700\u6c42\u91cf\uff0c\u800c\u4e14\u662f\u5047\u8a2d\u710a\u8173\u9577\u5ea6\u8d85\u904e\u677f\u539a\u5728\u4e00\u5b9a\u7bc4\u570d\u5167\uff0c\u710a\u8173\u5c16\u7aef\u6cbe\u9644\u7684\u932b\u818f\u5728\u9ad8\u6eab\u4e0b\u7194\u878d\u5f8c\u53ef\u4ee5\u56de\u6d41\u5230\u710a\u8173\u8207PCB\u4e4b\u9593\u3002<\/font><\/p>\n

\u5982\u679c\u4f60\u7684\u6848\u4f8b\u662f\u96f6\u4ef6\u710a\u8173\u9577\u5ea6\u6839\u672c\u5c31\u6c92\u6709\u8d85\u904e\u677f\u539a\uff0c\u90a3\u4f60\u5fc5\u9808\u8981\u5148\u6c7a\u5b9a\u4f60\u7684\u710a\u932b\u662f\u53ea\u8981\u5728\u5b54\u5167\u84cb\u904e\u710a\u8173\u5c16\u7aef\u5c31\u53ef\u4ee5\uff0c\u9084\u662f\u5fc5\u9808\u586b\u6eff\u901a\u5b54\uff1f\u5de5\u4f5c\u718a\u4ee5\u529b\u5b78\u7684\u89d2\u5ea6\u4f86\u770b\uff0c\u9019\u7a2e\u6848\u4f8b\u53ea\u8981\u710a\u932b\u84cb\u904e\u710a\u8173\u5c16\u7aef\u5c31\u53ef\u4ee5\u4e86\uff0c\u710a\u932b\u589e\u52a0\u7121\u52a9\u710a\u932b\u5f37\u5ea6\u3002<\/font><\/p>\n

<\/p>\n

\u53c3\u8003\u6587\u7ae0\u6700\u4e0a\u65b9\u7684\u5716\u4f8b\uff0c\u6700\u5de6\u5716\u70ba\u901a\u5b54\u710a\u63a5\u7684\u7406\u60f3\u60c5\u6cc1\uff0c\u6240\u4ee5\u710a\u932b\u4e0d\u53ea\u5b8c\u5168\u586b\u5145\u901a\u5b54\uff0c\u800c\u4e14\u9084\u53ef\u4ee5\u5728\u677f\u5b50\u7684\u4e0a\u4e0b\u5169\u9762\u90fd\u5f62\u6210\u6709\u6548\u7684\u5713\u5f27(fillet)\u3002<\/font><\/p>\n

\u6240\u4ee5\uff0c\u7406\u60f3\u7684\u710a\u932b\u9ad4\u7a4d Vt <\/sub>= Vpth<\/sub>(\u901a\u5b54\u5167\u7684\u710a\u932b\u91cf)+ 2Vfillet<\/sub>(PCB\u4e0a\u3001\u4e0b\u5169\u9762\u7684\u722c\u932b\u5713\u5f27\u9ad4\u7a4d\uff09<\/font><\/p>\n

\u8acb\u6ce8\u610f\uff1a<\/font><\/strong>\u932b\u818f\u7684\u6210\u4efd\u4e2d\uff0c\u5982\u679c\u4ee5\u9ad4\u7a4d<\/font><\/strong>\u4f86\u8a08\u7b97\u5176\u6bd4\u7387\uff0c\u5247\u932b\u7c89\u8207\u52a9\u710a\u5291\u7684\u6bd4\u7387\u5927\u7d0450%:50%<\/font><\/strong>\u3002\u6240\u4ee5\uff0cVs<\/sub>(\u932b\u818f\u9ad4\u7a4d\u5be6\u969b\u9700\u6c42\u91cf) = 2Vt<\/sub>(\u5169\u500d\u7684\u710a\u932b\u9ad4\u7a4d)\u3002\u53e6\u5916\uff0c\u932b\u818f\u91cf\u7684\u5370\u5237\u9664\u4e86\u8207\u958b\u5b54\u9762\u7a4d\u53ca\u92fc\u677f\u539a\u5ea6\u6709\u95dc\u5916\uff0c\u5b83\u9084\u8207\u92fc\u677f\u958b\u5b54\u7684\u5f62\u72c0\uff0c\u92fc\u677f\u958b\u5b54\u5782\u76f4\u9762\u7684\u8868\u9762\u7c97\u7cd9\u5ea6\uff0c\u522e\u5200\u7684\u901f\u5ea6\u58d3\u529b\u3001\u901f\u5ea6\u3001\u6750\u8cea\u8207\u89d2\u5ea6\u6709\u95dc\uff0c\u901a\u5e38\u7121\u6cd5\u9054\u5230\u767e\u5206\u767e\u7684\u4e0b\u932b\u7387\u3002<\/font><\/p>\n

\u90a3\u901a\u5b54\u56de\u6d41\u710a\u96f6\u4ef6\u7684\u710a\u932b\u9ad4\u7a4d\u662f\u5982\u4f55\u8a08\u7b97\u5f97\u4f86\u7684\u5462\uff1f<\/strong><\/font><\/p>\n

Vt<\/sub>(\u7e3d\u710a\u932b\u9ad4\u7a4d\u9700\u6c42\u91cf) = Vpth<\/sub>(\u901a\u5b54\u5167\u7684\u710a\u932b\u91cf)+ 2Vfillet<\/sub>(PCB\u4e0a\u3001\u4e0b\u5169\u9762\u7684\u722c\u932b\u5713\u5f27\u9ad4\u7a4d\uff09<\/font><\/p>\n

1) Vpth<\/sub>(\u901a\u5b54\u5167\u7684\u710a\u932b\u91cf) = \u901a\u5b54\u9ad4\u7a4d \u2013 \u710a\u8173\u9ad4\u7a4d = \u03c0 x hboard<\/sub> x (R\u00b2 – a\u00b2)<\/font><\/p>\n

\n

<\/font><\/p>\n

R = \u901a\u5b54\u534a\u5f91\uff0ca = \u710a\u8173\u534a\u5f91\uff0chboard<\/sub> =PCB\u677f\u539a<\/font><\/font><\/font><\/p>\n<\/blockquote>\n

2) Vfillet<\/sub>(\u710a\u9ede\u982d\u90e8\u5713\u5f27\u5340\u57df\u7684\u9ad4\u7a4d) = x  =Afillet<\/sub>(\u710a\u9ede\u9802\u90e8\u5713\u5f27\u5340\u57df\u9762\u7a4d) x 2\u03c0X(\u91cd\u5fc3\u4f4d\u7f6e\u5713\u5468\u9577) = 0.215r2<\/sup> x 2\u03c0(0.2234r+a)<\/font><\/font><\/p>\n

\n

<\/font><\/p>\n

r = \u710a\u9ede\u9802\u90e8\u5713\u5f27\u534a\u5f91\uff0c
X =\u710a\u9ede\u9802\u90e8\u5713\u5f27\u5340\u57df\u91cd\u5fc3\u8207\u710a\u8173\u4e2d\u5fc3\u8ddd = 0.2234r + a<\/font>
\u710a\u9ede\u982d\u90e8\u91cd\u5fc3\u4f4d\u7f6e = 0.2234r<\/font>
\u710a\u9ede\u982d\u90e8\u4e2d\u5fc3\u4f4d\u7f6e = 0.2234r + a<\/font><\/p>\n<\/blockquote>\n

\u5de5\u4f5c\u718a\u767c\u73fe\u5f88\u591a\u670b\u53cb\u5c0d\u9019\u500b\u516c\u5f0f\u6bd4\u8f03\u6709\u554f\u984c\u7684\u5730\u65b9\u662f\u5982\u4f55\u8a08\u7b97Vfillet<\/sub>(\u710a\u9ede\u982d\u90e8\u5713\u5f27\u5340\u57df\u7684\u9ad4\u7a4d) \uff0c\u5b83\u7684\u8a08\u7b97\u89c0\u5ff5\u57fa\u672c\u4e0a\u662f\u5148\u8a08\u7b97\u51fa\u300c\u722c\u932b\u5713\u5f27\u7684\u622a\u9762\u7a4d\u300d\uff0c\u7136\u5f8c\u518d\u4e58\u4ee5\u300c\u722c\u932b\u5713\u5f27\u91cd\u5fc3\u7684\u5713\u5468\u9577\u300d\uff0c\u9019\u6a23\u5c31\u53ef\u4ee5\u8a08\u7b97\u51fa\u5713\u5f27\u7684\u9ad4\u7a4d\u4e86\u3002<\/font><\/p>\n

\u300c\u722c\u932b\u5713\u5f27\u622a\u9762\u7a4d=0.215r2<\/sup> \u300d\u7684\u9a57\u8b49\uff1a<\/strong><\/font><\/font><\/p>\n

\u300c\u722c\u932b\u5713\u5f27\u91cd\u5fc3\u4f4d\u7f6e=0.2234r\u300d\u67e5\u8a62\u5de5\u7a0b\u8868\u683c\uff1a<\/strong><\/font><\/p>\n

\u722c\u932b\u5713\u5f27\u91cd\u5fc3\u4f4d\u7f6e\u7684\u8ad6\u8b49\u5de5\u4f5c\u718a\u9084\u6c92\u6709\u60f3\u5230\uff0c\u6240\u4ee5\u7528\u67e5\u8868\u7684\u65b9\u5f0f\u4f86\u7372\u5f97\uff0c\u6709\u77e5\u9053\u5982\u4f55\u8a08\u7b97\u7684\u670b\u53cb\u53ef\u4ee5\u5206\u4eab\u4e00\u4e0b\u5982\u4f55\u7b97\u51fa0.2234r\u3002<\/font><\/p>\n

<\/p>\n

\n

\u5ef6\u4f38\u95b1\u8b80\uff1a<\/font>
\u56db\u7a2e\u65b9\u6cd5\u6559\u4f60\u5982\u4f55\u5c40\u90e8\u589e\u52a0SMT\u88fd\u7a0b\u4e2d\u7684\u932b\u818f\u6216\u710a\u932b\u91cf<\/font><\/a>
\u4ecb\u7d39\u4e26\u8a8d\u8b58\u3010\u932b\u818f(solder paste)\u3011\u7684\u57fa\u672c\u77e5\u8b58(\u542b\u52a9\u710a\u5291)<\/font><\/a>
\u628aSMD\u96f6\u4ef6\u6539\u6210\u901a\u5b54\u56de\u6d41\u710a(Paste-In-Hole)\u88fd\u7a0b\u6703\u6709\u4f55\u5dee\u5225\u53ca\u5f71\u97ff?<\/font><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

\u6700\u8fd1\u770b\u5230\u6709\u7db2\u53cb\u983b\u983b\u8a62\u554f\u95dc\u65bc\u901a\u5b54\u56de\u6d41\u710a(ROT, …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,3,4],"tags":[160,75],"aioseo_notices":[],"views":10869,"_links":{"self":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts\/9058"}],"collection":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/comments?post=9058"}],"version-history":[{"count":7,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts\/9058\/revisions"}],"predecessor-version":[{"id":11110,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/posts\/9058\/revisions\/11110"}],"wp:attachment":[{"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/media?parent=9058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/categories?post=9058"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/m.letratesoro.com\/wp-json\/wp\/v2\/tags?post=9058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}