BTM Scandinavia AB
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Franska vägen 32
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S-393 56 KALMAR
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Tel: +46 480 868 75
4.1 Quality Control Tog-L-Loc
Joint quality (strength) is monitored by measurement of the cap thickness (tB) or of
the button dimension (BD). The cap thickness is the main measurement because
tolerances of material thickness causes fluctuations of the button diameter. Cap
thickness is controlled by adjusting punch penetration. As the shut hight is adjusted
down the cap thickness decreases. Backing off the shut hight will increase the cap
thickness. Therefore you will find more informations in capter tool change.
Cap thicknesses, as specified by BTM, are intended to give the optimum of joint
strength and
tool life. Decreasing cap thickness to exceed the recommended figure will increase
peel strength.Without measurable effect on shear strength, but will reduce tool life.
Increasing cap thickness to more than recommended figure will prolong tool life at
the cost of reduced peel strength; again, shear strength is not greatly affected as
long as a lock is achieved.
The joint button allows easy visual inspection. Broken, improperly adjusted or
misaligned tools
produce visually distorted buttons. Defective strippers and part nonconformity will
also show up
in visual inspection. Refer to “Trouble Shooting”pages for specific information.
Checking CT (Cap Thickness)
Checking BD (Button Diameter)
Shear Peel
Tn – Neck T
f – Locking
CT – Cap Thickness
h – Button Height
BD – Button Diameter
CT
