Metal sheets having differentthicknesses are welded together using themashresistance welding method- eg in the automotive industry - for thepurpose of weight saving. These sheets are further processed by forming (deepdrawing) them to manufacture car body parts. In order to ensure the deepdrawing quality, the width of the welding zone „a“ (³ 3 * t1) must be checkedfor any lack of fusion.

用滚压电阻缝焊法把不同厚度的金属板焊接在一起，例如：汽车制造业为了减轻重量，这些板材被进一步加工成汽车的车体部位，为了确保深冲压的质量，焊缝宽度区域的任何未熔合都不允许存在。

SOLUTION:

The waterflow probe H 10 MBF, equipped with an 8 mm long nozzle, is guided along the weld - as shownin the figure. The sound beam covers the complete welding zone with asensitivity loss of 6 dB at the twoweld edges.

如图所示,H 10 M BF水柱探头带有8mm的喷嘴,声束覆盖整个焊缝区域，以在两块薄板结合处边缘底波下降6DB作为灵敏度。

xis-Ber / Seite 2

A too narrow weld and any lack offusion are indicated by a series of intermediate echoes within the echosequence from the total thickness of the two welded sheets.

窄焊缝中的任何未熔合通过在两块薄板结合处低波之间出现的一系列中间回波被显示出来。

Defective weld

缺陷焊缝

The amplitude height of the flaw

indication corresponds to a

Æ 1.0 mm flat-bottom hole.

缺陷的幅度显示和Æ 1.0 mm的平底孔相当

Flaw-free weld

无缺陷的焊缝

SUITABLE EQUIPMENT:

设备

• Ultrasonic instrument: 超声设备USD15, USIP 20

• Probe:    探头                   H10 M BF        (67 322)

• Nozzle:   喷水嘴                     8/25              (67 321)

• Cable:    探头线                     PKP2          (66 709)

   

  The nozzle 8/25 was developed for thesheet combination 2 mm (t1) and 3 mm (t2).

  8/25喷嘴用于板厚2 mm (t1) and 3 mm (t2)焊接的检验