CN100360270C - 连体电极的电阻焊焊头及其制备方法 - Google Patents

连体电极的电阻焊焊头及其制备方法 Download PDF

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CN100360270C
CN100360270C CNB2005101212592A CN200510121259A CN100360270C CN 100360270 C CN100360270 C CN 100360270C CN B2005101212592 A CNB2005101212592 A CN B2005101212592A CN 200510121259 A CN200510121259 A CN 200510121259A CN 100360270 C CN100360270 C CN 100360270C
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杨仕桐
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Abstract

本发明涉及一种具有连体电极的电阻焊焊头及其制备方法。该焊头以具有足够强度硬度和耐足够高温的钨钼类金属为二个电极的材料，二个电极的尖端连成一体，在该二个电极之间有一分隔小槽，小槽内填充有绝缘隔层。该焊头的外形通常为柱状体。该焊头的二个电极之间的小槽内填充的绝缘隔层通常是绝缘垫片；可在所述的绝缘垫片的两面涂有绝缘粘胶将二个电极固定；也可在该焊头中部或中上部的外周套有匹配的绝缘套将二个电极固定。本发明连体电极的电阻焊焊头可以焊接漆包线，为电子元器件生产中需要以单面焊焊接漆包线引出接点提供了一种新的电阻焊焊头。

Description

连体电极的电阻焊焊头及其制备方法
技术领域
本发明涉及电子工业、微电子工业用的电阻焊焊头，尤其是适用于各种电子元器件或贴片电子元器件生产中需要以单面焊对漆包线引出线接点进行焊接的电阻焊焊头，及其制备方法。
背景技术
电阻焊的二个电极都是独立的，一般都认为不能连体，焊接时，把焊件置于二个电极之间，并施加压力，当焊接力达到设定值时接通电源，电流从二个电极流经焊件，产生电阻热并实现焊接。也有一种点电焊焊头(专利号ZL01114808.X)，是以绝缘粘胶作二个电极间的绝缘和固定，而电极的尖端欧姆接触，焊接时焊头尖端会产生电火花，所以这种焊头的二个电极尖端实质上也是分离的。
发明内容
本发明的目的是提供一种具有连体电极的焊头及其制备方法。为各种电子元器件生产中对漆包线引出接点需要进行单面焊提供一种新的电阻焊焊头。
本发明的连体电极的电阻焊焊头，具有二个电极，该二个电极的尖端连成一体(称为连体电极，其连体的一端称为连体端，另一端称为分离端)，在该二个电极之间有一分隔小槽，小槽内填充有绝缘隔层。
上述本发明的连体电极的电阻焊焊头，可以只在靠近二个电极分离端部分的分隔小槽中填充有绝缘隔层，也可以整条分隔小槽中都填充有绝缘隔层。
上述本发明的连体电极的电阻焊焊头的外形通常为柱状体。
上述本发明的连体电极的电阻焊焊头的电极最好由具有足够强度硬度和耐足够高温的钨钼类金属材料做成。该类金属材料有诸如钼金属、钨金属以及钨银、钨铜、铜和碳化钨的烧结材料等。
上述本发明的连体电极的电阻焊焊头，其二个电极之间的小槽内填充的绝缘隔层通常是绝缘垫片。可在所述的绝缘垫片的两面涂有绝缘粘胶将二个电极固定；也可在该焊头中部或中上部的外周套有匹配的绝缘套将二个电极固定。
本发明的连体电极的电阻焊焊头可通过如下方法制作：
(1)以具有足够强度硬度和耐足够高温的钨钼类金属作电极材料，先把电极材料加工成所需要的柱状体，通常可加工成Φ2-Φ5mm，长约25-50mm的棒料(小圆柱体)，也可加工成与该棒料大小相近的其它形状的柱状体，如椭圆形或方形或一端是圆形另一端是方形的柱状体等等；
(2)从柱状体一端开始至距另一端端面0.3-1.5mm处沿柱状体纵轴线加工一条贯通柱状体两侧面的分隔小槽，该小槽把柱状体分隔成一端连体的对称的二半(该连体的一端称连体端，另一端称分离端)，这二半分别作为二个电极；
(3)在连体端以柱状体纵轴线为中心，再过渡加工成需要的形状(如小方柱形或小圆柱形等)；
(4)在分隔小槽中填充绝缘隔层，并将二个电极绝缘固定(即是使二个电极之间相对保持固定状态，并且固定以后，二个电极之间除连体端外，其余部分保持绝缘状态)。这样就做成外形为柱状体的连体电极电阻焊焊头。
上述方法步骤(4)中所述的在分隔小槽中填充绝缘隔层可以是只填充靠近分离端的一部分(该部分通常为焊头的挟持部分)，也可以是填充整条分隔小槽；填充物(绝缘隔层)的厚度和宽度与分隔小槽相致。所述的绝缘隔层通常为绝缘垫片；该绝缘垫片可以是由绝缘材料做成，也可以是由非绝缘材料做成的垫片再在其两面贴上绝缘层而成。绝缘固定二个电极的方法可以是在绝缘垫片的两面涂上绝缘粘胶，再把该绝缘垫片填充于分隔小槽内，以绝缘粘胶把二个电极进行固定；也可以是以匹配的绝缘套套紧连体电极的外周进行固定。
本发明的连体电极的电阻焊焊头在工作时，由于二个电极尖端是连体的，所以不会产生电火花。由于电极连体处比较细和薄，同时，电极材料的电阻率也比较高，工作时大量电流使电极连体部分产生高温，用以熨除漆包线上的绝缘漆，在焊接力的作用下，进而完成焊接。而ZL01114808.X专利的焊头是以二个电极尖端之间的欧姆接触产生的电火花，靠电火花除去漆包线上的绝缘漆。所以本发明连体电极的电阻焊焊头在结构和工作原理上与ZL01114808.X专利焊头都不相同。由于本发明连体电极的电阻焊焊头做成柱状体，故容易把焊头夹做成与之匹配，便于安装使用。加上柱状体可以任意取一定的长度，所以可保证有足够的工作距离和空间，便是于进行焊接操作。另外，二个电极连体部份可以加工得比较细小，便于电子工业在细小的焊盘上使用，需要的电流量也少。所以本发明连体电极的电阻焊焊头可以广泛应用于电子工业微电子工业，尤其适用于各种电子元器件或贴片电子元器件生产中需要以单面焊对于漆包线引出接点的焊接。
以下结合附图和具体实施方式对本发明作进一步说明。
附图说明
图1是本发明连体电极的电阻焊焊头的结构示意图；其中(1-1)为右视图，(1-2)为主视图，(1-3)和(1-4)分别为C，D部分的放大图。
图2是本发明连体电极的电阻焊焊头的一种实施例的立体结构示意图。
图3是本发明连体电极的电阻焊焊头的另一种实施例的立体结构示意图。
具体实施方式
参照图1。本发明的连体电极的电阻焊焊头主要由尖端3连成一体的二个电极1a和1b构成；二个电极之间除尖端部分外，由一贯通的分隔小槽2隔开，该小槽中填充有绝缘隔层4；该绝缘隔层可以是只填充分隔小槽的上部部分即分离端部分(如附图中的4所示)，也可以是填充整个分隔小槽。可在绝缘隔层4的两面涂上热固化绝缘粘胶，然后再将其填充于分隔小槽2中，通过绝缘粘胶实现二个电极之间的绝缘固定。
本发明连体电极的电阻焊焊头的整体外形呈一端为尖形的柱状体(如图1至图3所示)；该焊头的外径(或截面外接圆直径)一般为2-5mm，长度一般为25-50mm；二个电极之间的分隔小槽2的宽度(即二个电极间的分隔距离)，依焊头外径的大小而不同，一般为0.2-0.5mm；二个电极尖端连体部分的厚度d一般为0.3-1.5mm(通常为0.5-1mm)。焊头尖端(即二个电极的连体部分)可按需要过渡加工做成小方形、小圆形等等各种形状的端面。
以下列举本发明连体电极的电阻焊焊头的具体制备实施例。参照图2和图3，取Φ3×30mm的钼棒AB，在钼棒的A端向B端沿纵轴线加工一条贯通钼棒两侧面的分隔小槽2，该分隔小槽宽约0.20mm，长29.4mm，直达离B端末端0.6mm处，这样就把钼棒AB加工成在B端仍连体的对称的二半，该二半将分别成为二个电极1a和1b；然后在B端以仍以AB纵轴线为中心，把B端过渡加工成小方柱状，该小方柱底部(B端端面)的面积约为1×1mm2。最后取厚度与分隔小槽2宽度相同的绝缘片(例如云母片)，在绝缘片的两面涂上绝缘粘胶(例如“502粘胶”)，再将其填充在分隔小槽2上部的AG段，固化后二个电极1a和1b之间即相对固定(如图2所示)；绝缘片也可以不涂粘胶，而直接填充于分隔小槽中，再用一与钼棒AB外周相匹配的绝缘套5(由绝缘材料做成，或者是由金属材料做成后内表面贴有绝缘层的管状体)紧套于二个电极的中部或中上部(如图3所示)，使二个电极之间相对固定；这样即做成连体电极的电阻焊焊头。
把按上述方法做成的连体电极的电阻焊焊头安装在如专利号为ZL01114785.7所公开的“直接焊接漆包线的点电焊机”上，设定的三个焊接参数为：输出脉冲幅度1.30V、输出脉冲时间12ms、焊接力0.7kg，用Φ0.12mm的普通漆包线，在厚为0.12mm镀锡的磷铜材料电子元件引脚上，取得满意的焊接效果。焊接寿命超过10000个焊点。

Claims (9)

1.一种连体电极的电阻焊焊头，其特征在于该焊头的二个电极的尖端连成一体，在该二个电极之间有一分隔小槽，小槽内填充有绝缘隔层。
2.如权利要求1所述的连体电极的电阻焊焊头，其特征在于只在靠近二个电极分离端部分的分隔小槽中填充有绝缘隔层。
3.如权利要求1所述的连体电极的电阻焊焊头，其特征在于整条分隔小槽中都填充有绝缘隔层。
4.如权利要求1所述的连体电极的电阻焊焊头，其特征在于该焊头的外形为柱状体。
5.如权利要求4所述的连体电极的电阻焊焊头，其特征在于该焊头的外径或截面外接圆直径为2-5mm，长度为25-50mm；二个电极之间的分隔小槽2的宽度为0.2-0.5mm；二个电极尖端连体部分的厚度为0.3-1.5mm。
6.如权利要求1-5之一所述的连体电极的电阻焊焊头，其特征在于二个电极之间的分隔小槽内填充的绝缘隔层为绝缘垫片，该绝缘垫片的两面涂有绝缘粘胶将二个电极绝缘固定。
7.如权利要求1-5之一所述的连体电极的电阻焊焊头，其特征在于在该焊头中部或中上部的外周套有能使二个电极绝缘固定的绝缘套。
8.如权利要求1-5之一所述的连体电极的电阻焊焊头，其特征在该焊头的电极材料由具有足够强度硬度和耐足够高温的钨钼类金属做成。
9.权利要求1-8之一所述的连体电极的电阻焊焊头的制备方法，其特征是包括以下步骤：
(1)以具有足够强度硬度和耐足够高温钨钼类金属作电极材料，先把电极材料加工成所需要的柱状体；
(2)从柱状体一端开始至距另一端端面0.3-1.5mm处沿柱状体纵轴线加工一条贯通柱状体两侧面的分隔小槽，该小槽把柱状体分隔成一端连体的对称的二半，这二半分别作为二个电极；
(3)在连体端以柱状体纵轴线为中心，再过渡加工成需要的形状；
(4)在分隔小槽中填充绝缘隔层，并将二个电极绝缘固定。
CNB2005101212592A 2005-12-23 2005-12-23 连体电极的电阻焊焊头及其制备方法 Ceased CN100360270C (zh)

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PCT/CN2006/003404 WO2007071162A1 (fr) 2005-12-23 2006-12-14 Tete de soudage pour soudage electrique par resistance, et son procede de production
US12/158,565 US20090266798A1 (en) 2005-12-23 2006-12-14 Resistance welding head and method for manufacturing the same
CN2006800486352A CN101394968B (zh) 2005-12-23 2006-12-14 电阻焊焊头及其制备方法
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US20090266798A1 (en) 2009-10-29
WO2007071162A1 (fr) 2007-06-28
CN101394968B (zh) 2010-12-15
CN1792538A (zh) 2006-06-28

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Assignee: Guangzhou Micro Welding Equipment Co., Ltd.

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Denomination of invention: Resistance welding head for conjoined electrode and preparation method thereof

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