阅读说明：本技术 一种空气导管电子束焊缝超声检测用人工伤对比试块 (Manual injury comparison test block for ultrasonic detection of air conduit electron beam weld joint ) 是由 朱萍 董德秀 苗旗健 柏镇 于 2021-09-08 设计创作，主要内容包括：本发明涉及一种空气导管电子束焊缝超声检测用人工伤对比试块,所述人工伤对比试块为截取自空气导管的一部分,包括空气导管的端头部分及多圈圆周焊缝,所述人工伤对比试块上开设有半圆周切口,露出内筒体内表面,切口的起止位置在内筒体的凸台附近,但不破坏该凸台处的焊缝,且至少保留一圈完整焊缝；所述人工伤对比试块的焊缝上设置有横孔和平底孔一人工伤；所述端头焊缝对应的外筒体上预制有切口二,切口二底部开设有平底孔二,平底孔二的孔底位于端头焊缝的焊接面。本发明实现了空气导管焊缝检测的灵敏度调整和缺陷评定。(The invention relates to a manual injury comparison test block for ultrasonic detection of an electron beam welding line of an air conduit, which is a part of an air conduit, and comprises an end part of the air conduit and a plurality of circles of circumferential welding lines, wherein the manual injury comparison test block is provided with a semi-circumferential notch which exposes the inner surface of an inner cylinder body, the starting and stopping position of the notch is near a boss of the inner cylinder body, but the welding line at the boss is not damaged, and at least one circle of complete welding line is reserved; a transverse hole and a flat bottom hole are arranged on a welding seam of the artificial injury reference block; a second notch is prefabricated on the outer barrel corresponding to the end welding seam, a second flat-bottom hole is formed in the bottom of the second notch, and the hole bottom of the second flat-bottom hole is located on the welding surface of the end welding seam. The invention realizes the sensitivity adjustment and defect evaluation of the air conduit welding line detection.)

1. The utility model provides an air pipe electron beam welding seam ultrasonic testing is with artifical wound reference test block which characterized in that: the artificial damage reference block is a part cut from the air conduit and comprises an end part of the air conduit and a plurality of circles of circumferential welding seams, a semi-circumferential notch is formed in the artificial damage reference block and exposes the inner surface of the inner cylinder body, the starting and stopping positions of the notch are near a boss of the inner cylinder body, but the welding seams at the boss are not damaged, and at least one circle of complete welding seams are reserved; a transverse hole and a flat bottom hole are arranged on a welding seam of the artificial injury reference block; a second notch is prefabricated on the outer barrel corresponding to the end welding seam, a second flat-bottom hole is formed in the bottom of the second notch, and the hole bottom of the second flat-bottom hole is located on the welding surface of the end welding seam.

2. The artificial injury reference block for the ultrasonic detection of the electron beam welding seam of the air conduit according to claim 1, is characterized in that: the manual injury reference block comprises an end part of an air conduit and 3 circles of circumferential welding seams.

3. The artificial injury reference block for the ultrasonic detection of the electron beam welding seam of the air conduit according to claim 1, is characterized in that: the transverse hole is formed in the position of the welding seam exposed by the semi-circumferential notch and is formed in the axial direction; the first flat-bottom hole is arranged at the position of the complete welding line and is arranged from the inner surface of the inner cylinder body along the radial direction.

4. The artificial injury reference block for the ultrasonic detection of the electron beam welding seam of the air conduit according to claim 3, is characterized in that: the bottom of the first flat bottom hole is a welding surface.

5. The artificial injury reference block for the ultrasonic detection of the electron beam welding seam of the air conduit according to claim 1, is characterized in that: the aperture, the number and the diameter of the flat bottom hole I are determined according to the actual acceptance requirements of the parts.

Technical Field

The invention belongs to the technical field of nondestructive ultrasonic detection, and particularly relates to an artificial injury comparison test block for ultrasonic detection of an electron beam weld of an air conduit.

Background

The air conduit is an important component of a turbine rotor assembly of the engine, an inner cylinder and an outer cylinder are welded by adopting an electron beam welding mode to form the conduit cylinder, and the air conduit is mainly used for guiding air in the engine. Due to the fact that the working temperature is high, the control process of the electron beam welding process is not good, the position of a welding line is prone to generating defects, and the flight safety of the airplane is directly affected. The electron beam welding seam of the air duct needs to be subjected to ultrasonic detection according to design requirements, but the total axial height of parts exceeds 900mm, but the diameter of a cylinder body is only 120mm, and the inner cavity is long and narrow and has larger curvature; 5 circles of circumferential welding seams are axially distributed on the cylinder body, six electron beam welding seams are uniformly distributed on each circumference, the welding seams are located at the center of the boss structure where the inner cylinder body and the outer cylinder body are in butt joint, as shown in the figure 1-2, the circumferential length of each welding seam is about 8mm, and the axial length of each welding seam is about 2 mm. Because the part is long and narrow and the camber is big, and boss beam welding seam structural feature, welding seam and near structure in addition are special, including having boss, fretwork, chamfer, incident position narrow and small, conventional supersound test block can't be used for ultrasonic testing, needs a standard component for air conduit electron beam welding seam ultrasonic testing urgently.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an artificial damage comparison test block for ultrasonic detection of an electron beam weld of an air conduit, and the artificial damage comparison test block is designed according to the structural characteristics of a circumferential lug boss beam weld of a cylinder body of the air conduit, so that the sensitivity adjustment and defect evaluation of the weld detection are realized.

A kind of air conduit electron beam weld seam ultrasonic testing uses the comparison test block of artificial injury, the said artificial injury compares the test block to intercept from a part of the air conduit, including end part and many circles of circumferential weld seams of the air conduit, offer the semicircular cut on the said artificial injury compares the test block, expose the inner surface of inner cylinder, the starting and stopping position of the cut is near boss of the inner cylinder, but does not destroy the weld seam in the boss, and keep a complete weld seam of at least circle; a transverse hole and a flat bottom hole are arranged on a welding seam of the artificial injury reference block; a second notch is prefabricated on the outer barrel corresponding to the end welding seam, a second flat-bottom hole is formed in the bottom of the second notch, and the hole bottom of the second flat-bottom hole is located on the welding surface of the end welding seam.

The manual injury reference block comprises an end part of an air conduit and 3 circles of circumferential welding seams.

The transverse hole is formed in the position of the welding seam exposed by the semi-circumferential notch and is formed in the axial direction; the first flat-bottom hole is arranged at the position of the complete welding line and is arranged from the inner surface of the inner cylinder body along the radial direction.

The bottom of the first flat bottom hole is a welding surface.

The aperture, the number and the diameter of the flat bottom hole I are determined according to the actual acceptance requirements of the parts.

The invention has the beneficial effects that: the invention provides a manual injury comparison test block for ultrasonic detection of an air conduit electron beam weld joint, which can be used for detection before leaving a factory and regular detection in the using process of the air conduit electron beam weld joint. The invention can be used for regular monitoring of the quality of the welding seam, thereby avoiding the occurrence of faults, and the test block is convenient to carry, can be simultaneously suitable for various water immersion methods and contact methods, and has great economic benefits.

Drawings

FIG. 1 is a schematic view of an air duct electron beam weld position (wherein (a) is a schematic view of a cross section of an air duct and (b) is an enlarged schematic view of the weld position);

FIG. 2 is a schematic diagram illustrating a relationship between a semi-circumferential incision and an artificial wound in an artificial wound reference block according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of three types of artificial injuries provided by an embodiment of the present invention (wherein, FIG. (a) is a cross-hole artificial injury with a diameter of φ 1.2, FIG. (b) is a cross-hole artificial injury with a diameter of φ 0.8, and FIG. (c) is a flat-bottom hole artificial injury with a diameter of φ 1.2);

FIG. 4 is a schematic view of a tip portion of the present invention;

wherein the content of the first and second substances,

1-outer cylinder, 2-inner cylinder, 3-welding line, 4-boss, 5-semi-circumference cut, 6-transverse hole, 7-first flat bottom hole, 8-end welding line, 9-second cut and 10-second flat bottom hole.

Detailed Description

For better understanding of the present invention, the technical solutions and effects of the present invention will be described in detail by the following embodiments with reference to the accompanying drawings.

The utility model provides an air pipe electron beam welding seam ultrasonic testing is with artifical wound comparison test block, for intercepting from a part of air pipe, air pipe distributes along its axial has many circles circumferential weld 3, every circle six electron beam welding seams 3 of equipartition, welding seam 3 is located the position at the center of the boss 4 structure of interior barrel 2 and outer barrel 1 butt joint, end welding seam 8 is located the tip, and is far away with outer barrel 1 distance, and the air pipe axial distribution that provides in this embodiment has 5 circles circumferential weld 3. This artifical contrast test piece of hindering includes air conduit's end part and many circles circumferential weld 3, and the artifical contrast test piece of hindering that provides in this embodiment includes air conduit's end part and 3 circles circumferential weld 3, and every circle contains 6 equipartition electron beam welding seams 3, and 3 sizes of welding seam are axial 2mm circumferential 8 mm. The artificial injury reference block is provided with a semi-circle notch 5, the inner surface of the inner cylinder body 2 is exposed, the starting and stopping positions of the notch are near a boss 4 of the inner cylinder body 2, but a welding seam 3 at the boss 4 is not damaged, and at least one circle of complete welding seam 3 is reserved for providing the complete welding seam 3 as a contrast, and playing a role of keeping the shape of the circumference undeformed, facilitating water immersion to detect workpiece clamping, and reserving one circle of complete welding seam 3 in the embodiment. A transverse hole 6 and a flat bottom hole I7 are arranged on a welding seam 3 of the artificial injury reference block for artificial injury, the selection basis of the type and the size of the artificial injury is the ultrasonic acceptance requirement of a detected piece, and the transverse hole 6 is arranged at the position of the welding seam 3 exposed by the semi-circumferential notch 5 and is axially arranged; the first flat bottom hole 7 is formed in the position of the complete welding seam 3 and is formed in the inner surface of the inner cylinder 2 in the radial direction, and the bottom of the first flat bottom hole 7 is a welding surface. The positional relationship between the semi-circumferential cuts 5 and the artificial wound is shown in fig. 2.

As shown in fig. 3, the weld 3 in this embodiment has three types of artificial injuries, namely, three types of defects are produced: a defect A, wherein a transverse hole 6 with the diameter of 1.2mm is axially arranged at the position of the welding seam 3 exposed by the semi-circumferential notch 5, and the transverse hole 6 penetrates through the welding seam 3; a transverse hole 6 with the diameter of 0.8mm is axially arranged at the position of the welding seam 3 exposed by the semi-circumferential notch 5, and the transverse hole 6 penetrates through the welding seam 3; and a defect C is that a first flat-bottom hole 7 with the diameter of 1.2mm and the burial depth of 3.3mm is formed in the inner cylinder 2 at the position of the complete welding seam 3. In the embodiment, the circumferential length of each welding seam 3 is 8mm, the axial length is 2mm, the manufactured defect types are a transverse hole 6 and a first flat bottom hole 7, and the transverse hole 6 is used for simulating a long defect of an air conduit and can be used for calibrating the length of a large defect; the first flat-bottom hole 7 is used for simulating the area type defects of the air guide pipe and can be used for calibrating the equivalent of small defects. The aperture and the number of the transverse holes 6 and the first plain bottom holes 7 are determined according to the actual acceptance requirements of the parts.

The end part comprises a whole circle of end welding seams 8, the welding seams are far away from the excircle, an internal hollow area is arranged for shielding incidence of sound beams, and flat-bottom holes cannot be directly manufactured from the outer barrel 1, therefore, notches II 9 are prefabricated on the outer barrel 1 corresponding to the end welding seams 8, as shown in fig. 4, flat-bottom holes II 10 are formed in the bottoms of the notches II 9, and the bottoms of the flat-bottom holes II 10 are located on the welding surface of the end welding seams 8. The diameter of the second flat bottom hole 10 is determined according to the actual acceptance requirement of the part.

The air conduit electron beam welding line ultrasonic artificial injury comparison test block is manufactured by cutting out air conduit parts, combines the acceptance requirements and the defect characteristics of easy generation of welding lines, and is provided with a notch for prefabricating a space for manufacturing artificial injury. The rest main parts of the test block are consistent with the parts, and the clamping tool or the detection tool which is the same as the parts can be used.

The ultrasonic probe is placed at the outer circumference position of a circumferential welding seam, the probe is moved until the maximum amplitude position of the height of the reflected wave of the flat bottom hole or the transverse hole is found, the gain value of the ultrasonic equipment is adjusted to enable the height of the reflected wave to be 80% of the full-screen height, the gain at the moment is the detection sensitivity, and the defect exceeding the standard is found when the defect exceeding 80% is found in the detection process.

The ultrasonic probe is placed at the position of the outer circumference and the inner circumference of the end welding seam, the probe is moved until the position of the maximum amplitude of the height of the reflected wave of the flat-bottom hole is found, the gain value of the ultrasonic equipment is adjusted to enable the height of the reflected wave to be 80% of the full-screen height, the gain at the moment is the detection sensitivity, and the defect exceeding the standard is found when the defect exceeding 80% is found in the detection process.