Draw-bending method

Details Draw-bending method Draw-bending method

1986-06-30

1987-09-01

Combs, E. Michael

Metal deforming

By deflecting successively-presented portions of work during...

By use of work-contacting wiper and moving, work-holding form

72710, B21D 905

Patent

active

046899812

ABSTRACT:
Apparatus for draw-bending metal tubes and other elongated workpieces of hollow section, in which a mandrel, supported on a bar within the tube, bears against the inner wall of the tube in the region of the bend and helps to prevent the tube section from collapsing or distorting. Vibration transducers are attached to the bar to set up a standing wave of resonant vibration within the mandrel and bar which has the effect of reducing friction between the mandrel and the tube. A special coupling device may be used to attach the transducers to the bar and may also serve to connect the bar to the fixed structure of the apparatus, and the invention includes the complete apparatus when tuned so as to generate a displacement antinode of vibration at the mandrel tip, a displacement node at the point of attachment of the coupling device to the structure, and generally so as to minimize waste of the vibratory energy.

REFERENCES:
patent: 3212312 (1965-10-01), Boyd et al.
patent: 3828596 (1974-08-01), Usui et al.
patent: 3878720 (1975-04-01), Stange et al.
patent: 4292826 (1981-10-01), Langenecker
patent: 4380917 (1983-04-01), Uchida et al.

Affiliated with

Also associated with

Rating

Draw-bending method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Draw-bending method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Draw-bending method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1257108