公开(公告)号：US20020189726A1

公开(公告)日：2002-12-19

申请号：US10222858

申请日：2002-08-19

Applicant: UIT, L.L.C. Company

Inventor： Efim S. Statnikov

IPC: C21D010/00

CPC classification number: B23P9/04 ,  B23K9/32 ,  B23K13/00 ,  C21D7/04 ,  C21D9/50 ,  C21D10/00 ,  C21D2201/00

Abstract: The novel methods, apparatus and reworked rotary braking surface product, for example those exhibited on interior cylindrical braking surfaces of a cast iron brake drum, serve to replace manufacturing defects exhibiting residual tensile stresses and outwardly directed tool marks with smooth compressed braking surfaces in a final manufacturing stage. The plastically deformed surface shape with reduced roughness and surface irregularities furthermore presents improved braking strength above the yield point and approaching the ultimate material strength of the base drum material. An ultrasonic transducer drives individual freely moving impact elements of a set at frequencies up to 55 kHz into the braking surface to effect plastic deformation at surface and sub-surface layers. Physically, the small sized ultrasonic transducer is inserted into a drum cylinder and driven by a lathe producing relative motion between the braking surface and the ultrasonically vibrating impact elements scanning only the braking surface in a readily controlled ultrasonic impact machining cycle for attaining specified braking surface performance.

公开(公告)号：US20040173290A1

公开(公告)日：2004-09-09

申请号：US10797016

申请日：2004-03-11

Applicant: UIT, L.L.C. Company

Inventor： Efim S. Statnikov

IPC: F16D065/02 ,  F16D069/02

CPC classification number: B23P9/04 ,  B23K9/32 ,  B23K13/00 ,  C21D7/04 ,  C21D9/50 ,  C21D10/00 ,  C21D2201/00

Abstract: The novel methods, apparatus and reworked rotary braking surface product, for example those exhibited on interior cylindrical braking surfaces of a cast iron brake drum, serve to replace manufacturing defects exhibiting residual tensile stresses and outwardly directed tool marks with smooth compressed braking surfaces in a final manufacturing stage. The plastically deformed surface shape with reduced roughness and surface irregularities furthermore presents improved braking strength above the yield point and approaching the ultimate material strength of the base drum material. An ultrasonic transducer drives individual freely moving impact elements of a set at frequencies up to 55 kHz into the braking surface to effect plastic deformation at surface and sub-surface layers. Physically, the small sized ultrasonic transducer is inserted into a drum cylinder and driven by a lathe producing relative motion between the braking surface and the ultrasonically vibrating impact elements scanning only the braking surface in a readily controlled ultrasonic impact machining cycle for attaining specified braking surface performance.

公开(公告)号：US20020043313A1

公开(公告)日：2002-04-18

申请号：US10015670

申请日：2001-12-17

Applicant: UIT, L.L.C. Company

Inventor： Efim S. Statnikov

IPC: C21D010/00

CPC classification number: B23P9/04 ,  B23K9/32 ,  B23K13/00 ,  C21D7/04 ,  C21D9/50 ,  C21D10/00 ,  C21D2201/00 ,  Y10T29/49774 ,  Y10T29/53535

Abstract: This invention provides methods of treatment for work products of materials such as steel, bronze, plastic, etc. and particularly welded steel bodies by pulse impact energy, preferably ultrasonic, to relax fatigue and aging and extend expectant life. The treatment may occur (a) at original production, (b) during the active life period for maintenance or (c) after failure in a repair stage. The ultrasonic treatment improves the work product strength. In welded products residual stress patterns near the weld sites are relaxed and micro-stress defects such as voids and unusual grain boundaries are reduced. The basic method steps are non-destructive in nature, inducing interior pulse compression waves with ultrasonic transducers and accessory tools impacting an external product surface with enough impulse energy to heat and temporarily plasticize the metal interior and relax stresses. The nature of the work product interior structure being treated is determined by sensing the mechanical movement at the impact surface of the work body to produce feedback frequency and phase signals responsive to input impact signals. These signals automatically conform driving pulse energy frequency and phase to the input transducers to match the mechanical resonance frequency of the working transducers and increase efficiency of energy transfer. Such feedback signals also are available for automated procedures which can improve product quality and consistency.