CN1110236C - 电子元器件安装方法及电子元器件安装装置 - Google Patents

电子元器件安装方法及电子元器件安装装置 Download PDF

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CN1110236C
CN1110236C CN96196841A CN96196841A CN1110236C CN 1110236 C CN1110236 C CN 1110236C CN 96196841 A CN96196841 A CN 96196841A CN 96196841 A CN96196841 A CN 96196841A CN 1110236 C CN1110236 C CN 1110236C
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广谷耕司
犬塚良治
大江邦夫
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Abstract

本发明提供一种能根据旋转头状况适当缩短安装间隔的电子元器件安装方法。为此，在将旋转头驱动电动机的连续旋转变换为设有多个安装吸嘴的旋转头的间隔转动，并与所述旋转头驱动电动机的旋转连动使吸嘴作上下运动，一边作间隔转动在多个工位暂停一边由吸嘴安装电子元器件的电子元器件安装过程中，根据旋转头停止时能稳定吸附安装的旋转头驱动电动机的转速和旋转头转动时吸附姿势不会改变的旋转头驱动电动机的转速，当前者小时在旋转头转动时使旋转头驱动电动机高速旋转，当后者小时在旋转头吸附安装时使旋转头驱动电动机高速旋转。

Description

电子元器件安装方法及电子元器件安装装置
技术领域
本发明涉及将电子元器件安装在印刷电路板上的电子元器件安装方法及其装置。
背景技术
下面，参照附图说明已有技术的电子元器件的安装。
图5为已有技术电子元器件安装装置的立体图。电子元器件安装装置主要由可放置印刷电路板并在Z轴方向(XY方向)移动的XY工作台7、可装有电子元器件并供给旋转头驱动部的元件供给台6、及供给并安装电子元器件的旋转头驱动部8构成，借助XY工作台7的移动将印刷电路板移动到规定的安装位置，元件供给台6向旋转头驱动部8的吸咀5供给元器件，吸咀5向印刷电路板提供并安装电子元器件。
图4为已有技术电子元器件安装装置中旋转驱动部8的立体图，旋转头1由设于其周围的多个吸咀5提供并安装电子元器件，旋转头驱动电动机2通过将该电动机2连续旋转变换为间隔转动的机构(未图示)，使旋转头1间隔转动。旋转头驱动电动机2可使旋转头1旋转和使吸咀5上下运动，通过同步齿形带3使凸轮4旋转，从而使吸咀作上下运动。
图3为说明上述旋转头动作的示意图，作为举例，使用有16个安装吸咀5的旋转头1。
该旋转头1在图中ST1至ST16所示各工位，边停止边向图中箭头方向作间隔转动。然后，在第7工位(ST7)安装吸咀5吸附电子元器件，在第15工位(ST15)安装电子元器件。就这样，交替进行电子元器件的安装、吸附和旋转头旋转。
图2为表示上述旋转头驱动电动机的旋转速度曲线的示意图，如该图所示，旋转头驱动电动机2的旋转速度vL(脉冲/秒)在安装间隔(tact)T间不变。这里，旋转头驱动电动机的转速(旋转速度)可定义为脉冲/秒，加速度可定义为脉冲/秒2。旋转头驱动电动机，在AC伺服电动机设有作为角度检测器的编码器，并利用该编码器来的脉冲信号控制电动机的驱动(这里电动机旋转一周输出1000个脉冲的数字信号)。因此，转速vL可定义为每秒电动机驱动编码器的脉冲数，据此可以决定电动机的旋转角度及转速。
安装间隔时间通常为安装一个元器件所需时间，如图2所示，为旋转头的旋转和吸咀安装元器件的合计时间。具体而言，如图3所示，就是旋转头的吸咀5从开始移动到移动到相邻吸咀并开始向下一位置移动的时间，例如，就是从ST7开始移动到ST8中吸咀5开始移动的时间。
已有技术的转速vL使用旋转头1停止时能稳定吸附安装的转速和旋转头1旋转时不会引起吸附姿势变化的转速中较小的一个转速。
但是，在上述已有技术中，因转速仅仅为旋转头1停止时能稳定吸附安装的旋转头驱动电动机2的转速和旋转头1旋转时不引起吸附姿势变化的旋转头驱动电动机2的转速中较小的一个，故存在安装间隔受限制的问题。因此，已有技术不能进行高效电子元器件的安装。
本发明揭示
本发明鉴于上述已往存在的问题，其目的在于提供一种能根据旋转头状况适当缩短安装间隔(节拍)的电子元器件安装方法及电子元器件安装装置。
附图概述
图1为表示本发明一实施形态的电子元器件安装装置中旋转头驱动速度的示意图。
图2为表示已有技术旋转头驱动速度的示意图。
图3为说明旋转头动作的示意图。
图4为表示电子元器件安装装置的旋转驱动部的示意图。
图5为表示电子元器件安装装置的示意图。
实施本发明的最佳形态
为实现上述目的，本发明的电子元器件安装方法及电子元器件安装装置，是使旋转头驱动电动机的连续旋转变换为设有多个安装吸咀的旋转头的间隔转动，并与所述旋转头驱动电动机旋转连动使所述多个安装吸咀作上下运动，一边间隔转动在多个工位暂停，一边借助所述多个安装吸咀安装电子元器件，其特征在于，根据所述旋转头停止时能稳定吸附安装的所述旋转头驱动电动机的转速和所述旋转头转动时吸附姿势不会变化的所述旋转头驱动电动机的转速，当前者转速小时在所述旋转头转动时使所述旋转头驱动电动机高速旋转，当后者转速小时在所述旋转头吸附安装时使所述旋转头驱动电动机高速旋转。
按照本发明的方法及装置，在旋转头停止时能稳定吸附安装的旋转头驱动电动机的转速和旋转头转动时吸附姿势不会变化的旋转头驱动电动机的转速中，前者小时，由于在旋转头转动时使旋转头驱动电动机高速旋转，故能缩短安装间隔(节拍)，后者小时，由于在旋转头停止时，即吸附安装时，使旋转头驱动电动机高速旋转，故能缩短安装间隔。
(第一实施形态)
下面，参照附图说明本发明一实施例。与图1、图3说明的构件相对应的构件标以同一标号并省略其详细说明。
本实施例中旋转头1的基本结构与已说明的已有技术的相同，如图3所示，具有16个安装吸咀的旋转头1边停止在各工位边向图中箭头方向作间隔转动。在第七工位(ST7)吸附电子元器件，在第十五工位(ST15)安装电子元器件。
图1(a)～(d)为表示本实施例中旋转头驱动电动机2的驱动速度的示图，图1(a)、(b)表示旋转头1停止时能稳定吸附安装的旋转头驱动电动机2的转速比旋转头1转动时吸附姿势不会变化的旋转头驱动电动机2的转速小的情况，图1(c)、(d)表示上述前者转速比后者转速大的情况。
在图1(a)中，旋转头1旋转时用加速度α(脉冲/S2)将旋转头驱动电动机2加速到转速为vH(脉冲/S)，经过规定时间后，以同样的加速度α减速(加速度为-α)至转速为vL(脉冲/S)。所述α、及vH的值设定为旋转头1旋转时吸附姿势不会变化的值。
如图1(b)所示在vH未到达最高速时，加速后(加速度为α)立即减速(加速度为-α)。图1(a)、(b)两种情况，在旋转头1停止，即吸附安装时，旋转头驱动电动机2的转速保持VL。
在图1(c)中，在旋转头1停止时，即吸附安装时以加速度α将旋转头驱动电动机2加速至转速vH(脉冲/S)，经过规定时间后以同样的加速度α减速至转速vH。所述α、vH的值设定为旋转头1旋转时能稳定吸附安装的值。另外，如图1(d)所示，在vH未达到最高速时，加速后(加速度α)立即减速(加速度-α)。旋转头1旋转时，旋转头驱动电动机2的转速保持vL。
这样一来，在旋转头停止时能稳定吸附安装的旋转头驱动电动机的转速和旋转头旋转时吸附姿势不会变化的旋转头驱动电动机的转速中，前者转速小时，由于在旋转头旋转时使旋转头驱动电动机高速旋转，故能缩短安装间隔，后者转速小时，由于在旋转头停止时，即吸附安装时使旋转头驱动电动机高速旋转，故可缩短安装间隔。其结果，可在稳定的吸附安装操作下缩短安装间隔(节拍)。
下面，图1(a)～(d)表示各个安装间隔T的计算式。旋转头1停止时，即吸附安装时，所需编码器的脉冲数表示为I1，旋转头1旋转时所需编码器的脉冲数表示为I2。
图1(a)场合的安装间隔T表示为(式1)。
T＝(vH-vL)2/(α·vH)+I1/vH+I2/vL              …式(1)
图1(b)场合的安装间隔T表示为(式2)。
T＝t+I2/vL                                      …(式2)
这里t按下面方程求解。
(1/2)·α·t2+vL·t-I1/2＝0
图1(c)场合的安装间隔T表示为(式3)
T＝(vH-vL)2/(α·vH)+I2/vH+I1/vL               …(式3)
图1(d)场合的安装间隔T表示为(式4)。
T＝t+I1/vL                                      …(式4)
这里t按下面方程求解。
(1/2)·α·t2+vL·t-I2/2＝0
这样在图1和图2中，斜线部分的面积表示检测旋转用编码器的脉冲数，该面积不变。如图清楚可见，通过使用本实施例中上述旋转头驱动电动机2的速度曲线，可缩短间隔T。
工业上的应用性
如上所述，按照本发明的电子元器件安装方法及电子元器件安装装置，在旋转头停止时，能稳定进行吸附安装的旋转头驱动电动机的转速，和旋转头旋转时吸附姿势不会变化的旋转头驱动电动机的转速中，由于前者转速小时在旋转头旋转时使旋转头驱动电动机高速旋转，和当后者转速小时在旋转头停止时，即吸附安装时使旋转头驱动电动机高速旋转，故能缩短安装间隔，从而在稳定吸附安装操作下降缩短安装间隔。

Claims (3)

1.一种电子元器件安装方法，使旋转头驱动电动机的连续旋转变换为设有多个安装吸咀的旋转头的间隔转动，并与所述旋转头驱动电动机旋转连动使所述多个安装吸咀作上下运动，一边间隔转动在多个工位暂停，一边借助所述多个安装吸咀安装电子元器件，其特征在于，根据所述旋转头停止时能稳定吸附安装的所述旋转头驱动电动机的转速和所述旋转头转动时吸附姿势不会变化的所述旋转头驱动电动机的转速，当前者转速小时在所述旋转头转动时使所述旋转头驱动电动机高速旋转，当后者转速小时在所述旋转头吸附安装时使所述旋转头驱动电动机高速旋转。
2.一种电子元器件安装装置，其备有多个安装吸咀的旋转头具有：将旋转头驱动电动机的连续旋转变换为旋转头间隔转动的装置；和与所述旋转头驱动电动机的旋转连动使安装吸咀作上下运动的装置，所述装置一边间隔转动在多个工位暂停一边安装电子元器件，其特征在于，所述装置具有使所述旋转头驱动电动机在所述旋转头转动时和吸附安装时以相互不同的速度旋转的装置。
3.如权利要求2所述的装置，其特征在于，构成使所述旋转头驱动电动机在所述旋转头转动时和吸附安装时以相互不同速度旋转的装置，按照所述旋转头停止时能稳定吸附安装的所述旋转头驱动电动机的转速和所述旋转头转动时吸附姿势不会改变的所述旋转头驱动电动机的转速，当前者转速小时在所述旋转头转动时使所述旋转头驱动电动机高速旋转，当后者转速小时在所述旋转头吸附安装时使所述旋转头驱动电动机高速旋转。
CN96196841A 1995-09-11 1996-09-11 电子元器件安装方法及电子元器件安装装置 Expired - Fee Related CN1110236C (zh)

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