Floating Load Piston for a Strain-Gauge Load Cell

Ruge's floating piston takes the load and passes it straight down onto the column. It is bored so the column reaches up inside it, and two diaphragms hold it centred in the shell.

متوسط

A few hours

التعليمات

Watch: boring a hole on a lathe

Boring a hole step by step on a metal lathe.

Turn the outside

Saw a length of round bar, center and face it, and turn the outside to size, leaving clearance inside the shell.

المواد لهذه الخطوة:

قضيب مستدير من صلب طري1 قطعة

الأدوات المطلوبة:

منشار حديد

مخرطة معادن

كلّاب المخرطة

زيت القطع

قدمة ورنية

Bore it

Chuck it, drill a starting hole from the lower end and bore it out with a boring bar, stopping short of the top: the column's rounded end bears on the end of the bore.

الأدوات المطلوبة:

مخرطة معادن

قضيب التجويف

زيت القطع

قدمة ورنية

Limits

Ruge's patent gives the part's shape and job but no material or size. Mild steel and silver-solder brazing are our choice; size it to the load you need. Lathe method after Palmateer, Elementary Machine Shop Practice (1918).