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Technology News

www.read-tpt.com

74

S

eptember

2015

Ultrasonic tube drawing system

THE Tube Drawing System and

components from Sonobond Ultrasonics

are

designed

to

accommodate

manufacturers of fine metal tubing

products used to transport critical fluids.

“In conventional tube drawing

systems, lubricants are used to reduce

friction between tooling and metal

tubing,” explained Sonobond president

Janet Devine. “With our ultrasonic

system, high-frequency vibrations create

a continuous cycle of increasing and

decreasing pressure between tooling

and work piece, resulting in less friction

and a reduction of force needed for

the draw, and consequently significant

improvement in the internal surface

finish of the tube, which is absolutely

essential for critical fluid transmission.

Optimum results are achieved when

the ultrasonic activation is used in

conjunction with ‘best practices’ such as

lubricants.”

In a standard rod draw operation, a

controller first positions the tube to be

drawn over a long back support rod,

terminated in a plug, so that the tube

to be drawn can be loaded onto the

machine. Draw carriage jaws then grasp

the tube and pull it through a die, which

is on the outside of the tube and aligned

with the plug inside the tube, thinning

the tube walls and achieving the desired

wall thickness and internal diameter.

Multiple draws are often required, with

progressively smaller dies and plugs to

reach the desired tube size.

In an ultrasonic system, a power

supply converts line power to the high

voltage, high frequency electrical power

needed to drive the transducer, which

is attached to a coupler at the back end

of the back support rod and mounted

on a carriage on the draw bench. The

transducer converts electrical energy to

vibratory energy.

Adding ultrasonic energy to a tube-

drawing operation can reduce the draw

force required, and permit heavier re-

ductions, reducing the number of draws

required to achieve a finished product.

Sonobond Ultrasonics

– USA

Email:

info@sonobondultrasonics.com

Website:

www.sonobondultrasonics.com

Sonobond’s ultrasonic tube drawing system