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style="color:#999999"><strong>å‘布旉™—´åQ?/strong>2020-08-11 <strong>æ¥æºåQ?/strong>沈阳å¨å…‹åˆ›æ–°ç„ŠæŽ¥è®‘Ö¤‡æœ‰é™å…¬å¸ </td> </tr> <tr> <td height="20"> </td> </tr> <tr> <td> <p>ä¸ç­‰åŽšåº¦å?qi¨¢ng)ä¸åŒææ–™çš?a href="http://www.clhczs.com/">点焊</a>åQ?/p> <p>    在通常æ¡äšg下,ä¸åŒåŽšåº¦å’Œä¸åŒæ料点焊时åQŒç†”æ æ€¸ä»¥è„“(chu¨¤ng)åˆé¢ä¸ºå¯¹¿UŽÍ¼Œè€Œå‘厚æ¿æˆ–导ç”üc(di¨£n)€å¯¼çƒ­æ€§å·®çš„焊件中å移åQŒå…¶¾l“果使其在脓(chu¨¤ng)åˆé¢ä¸Šçš„ž®ºå¯¸ž®äºŽè¯¥ç†”核直径,åŒæ—¶åQŒä¹Ÿä½¿å…¶åœ¨è–„件或导电(sh¨´)ã€å¯¼çƒ­æ€§å¥½çš„焊件中焊é€çŽ‡ž®äºŽè§„定数å€û|¼Œ˜q™å‡ä½¿ç„Šç‚ÒŽ(gu¨©)‰¿è½½èƒ½åŠ›é™ä½Žã€?/p> <p>1ã€å¿UÖMñ”生的原因åQ?/p> <p>    熔核å移的根本原因是焊接区在加热˜q‡ç¨‹ä¸­ä¸¤ç„Šäšgæžçƒ­å’Œæ•£çƒ­å‡ä¸ç›¸½{‰æ‰€è‡ß_(d¨¢)¼Œå移方å‘自然å‘ç€æžçƒ­å¤šã€æ•£çƒ­ç¼“慢的一方移动ã€?/p> <p>    ä¸åŒåŽšåº¦ç‚¹ç„Šæ—Óž¼ŒåŽšäšgç”?sh¨´)阻大æžçƒ­å¤šåQŒè€Œå…¶æžçƒ­ä¸­å¿ƒç”׃ºŽ˜qœç¦»ç”‰|žè€Œæ•£çƒ­ç¼“慢,薄äšg情况正相å,˜q™å°±é€ æˆç„ŠæŽ¥æ¸©åº¦åœºåŠ(qi¨¢ng)熔核厚æ¿å移ã€?/p> <p>    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<p>3ã€é‡‡ç”¨ä¸åŒæ料的甉|žåQ?/p> <p>    ç”׃ºŽä¸Šä¸‹ç”‰|žæ料的ä¸åŒï¼Œå…¶æ•£çƒ­ç¨‹åº¦ä¸ç›¸åŒåQŒå¯¼çƒ­æ€§å¥½çš„æ料放于厚ä»Óž¼ˆæˆ–导ç”üc(di¨£n)€å¯¼çƒ­æ€§å¥½çš„ç„Šä»Óž¼‰(j¨ª)é‚£é¢ä½¿å…¶çƒ­æŸå¤×ƒ¹Ÿå¤§ï¼Œä¹Ÿå¯è°ƒèŠ‚温度场分布,å‡å°ç†”æ ¸å移ã€?/p> <p>3ã€ä‹É用特ŒDŠç”µ(sh¨´)æžï¼š(x¨¬)</p> <p>    在电(sh¨´)æžå¤´éƒ¨åŠ ä¸é”ˆé’¢çŽ¯ã€é»„铜套ã€æˆ–采用ž®–锥状电(sh¨´)æžå¤´åQŒå‡å¯ä‹É焊接甉|µå‘中间集中,从而ä‹Éè–„äšgåQˆæˆ–导电(sh¨´)ã€å¯¼çƒ­æ€§å¥½çš„ç„Šä»Óž¼‰(j¨ª)æžçƒ­å¼ºåº¦å¢žåŠ åQŒä‹É温度场分布åˆç†ã€?/p> <p>    在薄ä»Óž¼ˆæˆ–导ç”üc(di¨£n)€å¯¼çƒ­æ€§å¥½çš„ç„Šä»Óž¼‰(j¨ª)上附加工艺垫片,工艺垫片由导热性差的æ料制作,厚度ä¸?.2-0.3mmåQŒæœ‰é™ä½Žè–„äšgåQˆæˆ–导电(sh¨´)ã€å¯¼çƒ­æ€§å¥½çš„ç„Šä»Óž¼‰(j¨ª)散热ã€å¢žåŠ ç”µ(sh¨´)‹¹å¯†åº¦çš„作用åQŒä¾‹å¦‚,ä¸é”ˆé’¢ç®”(d¨¡ng)片å¯ä½œäØ“(f¨´)é“œã€é“åˆé‡‘的点焊工艺垫片,低碳钢箔(d¨¡ng)片å¯ä½œäØ“(f¨´)金ä¸ä¸Žé‡‘½Ž”的点焊工艺垫片½{‰ï¼Œåœ¨ä‹É用工艺垫片时应注æ„规范ä¸è¦è¿‡å¤§ï¼Œä»¥é¿å…垫片与零äšg表é¢äº§ç”Ÿ¾_˜ç»“åQŒç„ŠåŽåº”很容易将其æ­æŽ‰ã€?/p> <p>    ç„Šå‰åœ¨è–„件或厚äšg上预先加工出凸点或凸圆,˜q›è¡Œå‡¸ç„Šæˆ–环焊是克æœç†”æ ¸å移现象的一æ¡å¾ˆæœ‰æ•ˆçš„措施ã€?/p> <p> </p> <p> </p> <p>                                              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