JPS6363965A - Driving apparatus for press-in echo ultrasonic probe - Google Patents

Abstract

PURPOSE:To continuously detect the reflected wave intensity distribution form of a press-in part, in an ultrasonic probe driving apparatus suitable for the automatic flaw detection of a press-in echo, by providing two transmitting ultrasonic probes and arranging one receiving ultrasonic probe between them. CONSTITUTION:A frame-shaped track 2 is mounted to a press-in ring 1 and the main body 3 of a press-in echo ultrasonic probe driving apparatus is fixed to the opposed sides parallel to in an axial direction of said track 2. Said main body 3 is constituted of a Z-direction drive part 4, a drive part 6 for scanning a receiving ultrasonic probe 5 in an X-direction and a drive part 9 for driving the drive part 6, transmitting ultrasonic probes 7, 8 and the probe 5 in a Y- direction and these parts are pressed by pressing mechanisms 10-12. By this constitution, the ultrasonic waves from the probes 7, 8 are reflected from a press-in part 13 on both sides thereof to scan the probe 5 in the X-direction and the intensity distribution form of the reflected waves is detected. Further, manual moving mechanisms 14, 15 sliding in the X-direction are provided to the mechanisms 10, 12 to be allowed to cope with the difference of a ring diameter or the angle of refraction of ultrasonic waves.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a press-fit echo ultrasonic probe drive device, and particularly relates to a press-fit echo ultrasonic probe drive device suitable for automatic flaw detection of press-fit echoes. .

[Conventional technology]

The conventional ultrasonic inspection method for press-fitted parts is disclosed in Japanese Patent Application Laid-open No. 59-141.
As described in Japanese Patent No. 062, there is a method that focuses on the difference in waveform of reflected waves in order to distinguish between a press-fit echo of a press-fit part and a defect echo caused by a defect.

Another ultrasonic inspection method is a method that focuses on the distribution form of reflected wave intensity at one position in order to identify defects in concave corners. However, no consideration has been given to a mechanism for automatically ultrasonically detecting the entire press-fit group having the length and width of press-fit rings of axles, various rotors, etc.

[Problem that the invention seeks to solve]

The above conventional technology does not take into consideration a mechanism for automatically ultrasonic flaw detection of the entire press-in area, but instead an ultrasonic probe and device are attached to the press-in part, and the entire press-in area is continuously and automatically ultrasonic tested. The problem was that it was not possible.

An object of the present invention is to provide two transmitting ultrasonic probes, one receiving ultrasonic probe between them, and scan the receiving ultrasonic probe from the press-fitting part surface side. By detecting the intensity distribution form of the reflected wave of the ultrasonic signal and scanning the entire ultrasonic probe in the circumferential and axial directions of the press-fit ring, the entire press-fit group can be continuously and automatically detected by ultrasonic flaws. An object of the present invention is to provide a press-fit echo ultrasound probe driving device.

[Means for solving the problem] - [First, two ultrasonic probes for transmitting (J) are provided, one ultrasonic probe for receiving is provided between them, and three ultrasonic probes are provided. This is achieved by providing three drives for scanning the probe.

[Effect]

By scanning the transmitting ultrasonic probe between the two transmitting ultrasonic probes, it operates to detect the intensity distribution form of the reflected wave on the press-fitting surface side. Further, by scanning the entire three ultrasonic probes in the axial direction of the press-fit ring, it operates to continuously detect the axial direction of the press-fit portion. Furthermore, by scanning the entire three probes in the circumferential direction of the press-fit ring, each of the press-fit portions scattered in the circumferential direction is operated to detect flaws.

Thereby, the entire press-in area can be continuously and automatically subjected to ultrasonic flaw detection.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1, 2, and 3. A raceway 2 is attached to the press-fit ring 1. The main body 3 is attached to the track 2.
a Z-direction drive unit 4 that drives the reception ultrasound probe 5 in the X direction, an X-direction drive unit 6 that scans the reception ultrasound probe 5 in the X direction, and an X-direction drive unit 6 and the transmission ultrasound probes 7, 8 . It has a Y-direction drive section 9 that drives the reception ultrasonic probe 5 in the Y direction. The ultrasonic probe is pressed by pressing mechanisms 10, 11, and 12.

The ultrasonic waves from the transmitting ultrasonic probes 7 and 8 are reflected on both sides of the press-fitting part 13, and by scanning the receiving ultrasonic probe 5 in the X direction, the intensity distribution form of the reflected waves is detected. . or,
The probe stamping machine 10.12 has a manual adjustment mechanism 14.15 that slides in the X direction, which allows it to adapt to differences in press-fit ring diameter, plate thickness, and ultrasonic refraction angle. ing.

In FIG. 2, by scanning the receiving ultrasonic probe 5 in the X direction, the intensity distribution form of the reflected wave of the press-fit part is detected, and by scanning the three ultrasonic probes in the Y direction, ,
Ultrasonic flaw detection can be performed continuously in the Y direction of the press-fitted part. By comparing the X-direction reflected wave intensity distribution form at each point in the Y-direction, press-fitting any and defective echoes can be more accurately identified. Further, by driving the entire main body 3 in the Z direction, press-fit portions scattered in the circumferential direction can be ultrasonically detected.

According to this embodiment, the intensity distribution form of the reflected waves from both sides of the press-fit portion can be continuously ultrasonically detected for the entire press-fit group.

〔Effect of the invention〕

According to the present invention, the intensity distribution form of the reflected wave of the press-fitted portion can be continuously detected for the entire press-fitted ring, so that ultrasonic flaw detection of the press-fitted portion can be performed more accurately.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of an embodiment of the present invention.
FIG. 3 is a diagram of the scanning locus of the ultrasonic probe in y and z, and details of the ultrasonic probe and the X scanning section. 4...Z drive section, 6...X direction drive section, 9...Y direction drive section.

Claims (1)

[Claims] 1. By providing transmitting ultrasonic probes on both sides of the shaft and the press-fitting part of the press-fitting ring, and providing a drive unit for scanning the receiving ultrasonic probe between them, A press-fit echo ultrasonic probe driving device characterized in that the shape of the intensity distribution of reflected waves from both sides of the press-fit portion is detected to determine the presence or absence of a defect. 2. In claim 1, a manual adjustment mechanism is provided that can adjust the interval between the transmitting ultrasonic probes, and the adjustment mechanism is provided to accommodate differences in the diameter of the press-fit ring, the plate thickness, and the refraction angle of the ultrasonic probes. A press-fit echo ultrasound probe drive device characterized by adaptability. 3. In claim 1, a drive shaft is provided for scanning the three ultrasonic probes in the axial direction of the press-fit ring, and the reflected wave intensity distribution form in the circumferential direction at each point in the axial direction is provided. A press-fit echo ultrasonic probe driving device characterized in that the press-fit echo and the defective echo are discriminated more accurately by comparison. 4. In claim 1, a drive shaft is provided for scanning the entire three ultrasonic probes in the circumferential direction of the press-fit ring, and ultrasonic flaw detection of the press-fit portions scattered in the circumferential direction is provided. A press-fitting echo ultrasonic probe drive device.