Peening position control device of ultrasound inner wall peening system

Abstract

A peening position control apparatus, includes: an ultrasonic wave generation unit generating ultrasonic waves; an ultrasonic wave radiation unit disposed to contact the ultrasonic wave generation unit, the ultrasonic wave radiation unit receiving an ultrasonic medium transmitting the ultrasonic waves therethrough; and an insert member configured to be inserted into a treatment object disposed inside the ultrasonic wave radiation unit.

1 . A peening position control apparatus, comprising:
 an ultrasonic wave generation unit generating ultrasonic waves;   an ultrasonic wave radiation unit disposed to contact the ultrasonic wave generation unit, the ultrasonic wave radiation unit receiving an ultrasonic medium transmitting the ultrasonic waves therethrough; and   an insert member configured to be inserted into a treatment object disposed inside the ultrasonic wave radiation unit,   wherein the insert member is inserted into the treatment object from one side of the treatment object; the ultrasonic waves generated by the ultrasonic wave generation unit are transmitted through the ultrasonic medium from the other side of the treatment object; the ultrasonic waves transmitted through the ultrasonic medium are reflected from a surface of the insert member located inside the treatment object to be converted into a standing wave inside the ultrasonic medium such that an inner wall of the treatment object is peened by the standing wave; and peening points on the inner wall of the treatment object are adjusted according to a degree of insertion of the insert member.   
     
     
         2 . The peening position control apparatus according to  claim 1 , wherein the peening points correspond to pressure antinodes of the standing wave. 
     
     
         3 . The peening position control apparatus according to  claim 2 , wherein the inner wall of the treatment object is peened by cavitation at points corresponding to the pressure antinodes. 
     
     
         4 . The peening position control apparatus according to  claim 1 , wherein the surface of the insert member located inside the treatment object has a reflective facet formed thereon to reflect the ultrasonic waves generated by the ultrasonic wave generation unit. 
     
     
         5 . The peening position control apparatus according to  claim 4 , wherein the reflective facet comprises a rigid body. 
     
     
         6 . The peening position control apparatus according to  claim 1 , wherein the treatment object comprises an inner wall of a nozzle. 
     
     
         7 . The peening position control apparatus according to  claim 1 , wherein the insert member comprises a rod. 
     
     
         8 . The peening position control apparatus according to  claim 4 , wherein the reflective facet has different acoustic impedance than the ultrasonic medium such that the ultrasonic waves are reflected by the reflective facet to be amplified into the standing wave inside the ultrasonic medium. 
     
     
         9 . The peening position control apparatus according to  claim 1 , wherein the ultrasonic wave generation unit is at least partially inserted into the treatment object from the other side of the treatment object.