Water immersion type ultrasonic detection auxiliary device for annular workpiece

Abstract

The utility model belongs to the technical field of ultrasonic detection, and particularly discloses a water immersion type ultrasonic detection auxiliary device for an annular workpiece, which comprises a transition cover body, a mandrel, a workpiece and a chuck, the transition cover body is a circular ring with a closed upper end face, the lower end of the transition cover body is arranged on the chuck, and a positioning hole is arranged on the upper end face of the transition cover body; a circular positioning plate is arranged at the upper end of the mandrel, a positioning shaft is arranged at the lower end of the mandrel, and the positioning shaft is matched with the positioning hole; the positioning shaft of the core shaft is inserted into the positioning hole; an inner hole of the workpiece is sleeved on the positioning plate at the upper end of the mandrel; the lower end surface of the workpiece is in contact with the upper end surface of the transition cover body; the auxiliary device is simple in structure, convenient to install and high in structural stability, the detection requirements of workpieces of different specifications can be met by changing different mandrels, and the detection range of the water immersion type ultrasonic detector is enlarged while the detection precision is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrasonic testing, and particularly relates to a water immersion type ultrasonic testing auxiliary device for annular workpieces. Background Art

[0002] In the process of machining, the internal defect detection of annular workpieces is an essential technological process. Water immersion ultrasonic testing is the main method for detecting internal defects of annular workpieces, especially for ring forging products applied in the aerospace, nuclear industry and other key fields.

[0003] At present, the maximum inner diameter of the annular workpiece that can be clamped and supported by the existing water immersion ultrasonic detector due to the size of the inherent turntable of the device is 600 mm, and the minimum inner diameter of the annular workpiece that can be clamped and supported by using a three-jaw chuck on the inherent turntable is 25 mm. As a result, for annular workpieces with an inner diameter less than 25 mm, the existing water immersion ultrasonic detector cannot be realized. Summary of the Utility Model

[0004] Aiming at the problems existing in the background art, the utility model provides a water immersion type ultrasonic testing auxiliary device for annular workpieces.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: A water immersion type ultrasonic testing auxiliary device for annular workpieces, including a transition cover body, a core shaft, a workpiece and a chuck. The transition cover body is a ring with a closed upper end surface. The lower end of the transition cover body is installed on the chuck, and a positioning hole is arranged on the upper end surface of the transition cover body. The upper end of the core shaft is a circular positioning plate, and the lower end of the core shaft is a positioning shaft, which is adapted to the positioning hole. The positioning shaft of the core shaft is inserted into the positioning hole. The inner hole of the workpiece is sleeved on the positioning plate at the upper end of the core shaft, and the lower end surface of the workpiece is in contact with the upper end surface of the transition cover body.

[0006] The positioning hole is located at the center of the upper end surface of the transition cover body, and the positioning hole is a regular hexagonal through hole.

[0007] The positioning shaft is a regular hexagonal column body, which is located at the center of the lower end surface of the positioning plate, and the length of the positioning shaft is not greater than the depth of the positioning hole.

[0008] A groove is arranged at the junction of the upper end of the positioning shaft and the positioning plate.

[0009] The outer diameter of the positioning plate is adapted to the inner hole of the workpiece.

[0010] The positioning hole, the positioning shaft, the positioning plate, the workpiece and the chuck are coaxial.

[0011] The axis of the positioning hole is perpendicular to the upper end surface of the transition cover body.

[0012] Advantages of the present utility model: The present utility model provides a water immersion type ultrasonic detection auxiliary device for annular workpieces. The auxiliary device has a simple structure, is convenient to install, and has strong structural stability. By changing different mandrels, the detection requirements of workpieces with different specifications can be realized. While ensuring the detection accuracy, the detection range of the water immersion type ultrasonic detector is expanded. Description of the Drawings

[0013] Figure 1 It is the front sectional view of the present utility model.

[0014] Figure 2 It is the top view of the present utility model.

[0015] Figure 3 It is the front view of the transition cover.

[0016] Figure 4 It is the bottom view of the transition cover.

[0017] Figure 5 It is the front view of the mandrel.

[0018] Figure 6 It is the bottom view of the mandrel.

[0019] In the figure: 1. Transition cover, 11. Positioning hole, 2. Mandrel, 21. Positioning shaft, 23. Positioning plate, 3. Workpiece, 5. Chuck. Specific Embodiments

[0020] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments; based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] The following combines the attached Figure 1-6A further detailed description of the specific embodiments of the present utility model is as follows: A water immersion ultrasonic testing auxiliary device for annular workpieces includes a transition cover 1, a mandrel 2, a workpiece 3, and a chuck 5. The transition cover 1 is a ring with a closed upper end surface. The lower end of the transition cover 1 is installed on the chuck 5, and a positioning hole 11 is provided on the upper end surface of the transition cover 1. The upper end of the mandrel 2 is a circular positioning plate 23, and the lower end of the mandrel 2 is a positioning shaft 21. The positioning shaft 21 is adapted to the positioning hole 11. The positioning shaft 21 of the mandrel 2 is inserted into the positioning hole 11. The positioning hole 11 is located at the center of the upper end surface of the transition cover 1, and the positioning hole 11 is a regular hexagonal through hole. The positioning shaft 21 is a regular hexagonal cylinder, and the positioning shaft 21 is located at the center of the lower end surface of the positioning plate 23. The length of the positioning shaft 21 is not greater than the depth of the positioning hole 11. Since this experiment needs to be carried out underwater, the chuck 5 needs to drive this device to rotate slowly underwater. When rotating, in order to prevent the positioning shaft 21 from rotating and displacing due to resistance in the positioning hole 11. In this embodiment, the positioning shaft 21 and the positioning hole 11 are set as regular hexahedrons. This design can ensure that the positioning shaft 21 and the positioning hole 11 do not generate displacement when rotating. Since the coaxiality between the positioning shaft 21 and the positioning hole 11 should not be greater than 0.1 mm, in order to ensure the coaxiality between the positioning shaft 21 and the positioning hole 11, the positioning shaft 21 and the positioning hole 11 are connected by a plug-in method. A groove is provided at the junction of the upper end of the positioning shaft 21 and the positioning plate 23. The groove is for making it easier to pull out the mandrel 2 when inserting and removing it. The inner hole of the workpiece 3 is sleeved on the positioning plate 23 at the upper end of the mandrel 2. The outer diameter of the positioning plate 23 is adapted to the inner hole of the workpiece 3. In order to facilitate the taking and placing of the workpiece 3, a notch is provided on the circular positioning plate 23, and the size of the notch can be changed according to the actual use situation (such as Figure 6 as shown). In the actual use process, since there are various specifications of the workpiece 3, in order to increase the versatility of this device, when it is necessary to replace workpieces 3 of different specifications, only the corresponding mandrel 2 needs to be replaced. The axis of the positioning hole 11 is perpendicular to the upper end surface of the transition cover 1, and the lower end surface of the workpiece 3 is in contact with the upper end surface of the transition cover 1. The positioning hole 11, the positioning shaft 21, the positioning plate 23, the workpiece 3, and the chuck 5 are coaxial. The coaxiality of the positioning hole 11, the positioning shaft 21, the positioning plate 23, the workpiece 3, and the chuck 5 can reduce the rotational error generated during the experiment and make the experimental results more accurate.

[0022] The using process of the utility model is as follows: First, install the transition cover 1 on the chuck 5; then insert a suitable mandrel 2 into the positioning hole 11 of the transition cover 1, and sleeved the lower end of the workpiece 3 on the positioning plate 23 of the mandrel 2; finally, use bolts to install the chuck 5 on the workbench of the immersion ultrasonic detector; start the immersion ultrasonic detector to detect the upper end of the workpiece 3. After detecting the upper end of the workpiece 3, turn the workpiece 3 over and place it on the positioning plate 23 for detection again; after the detection is completed, it can be determined whether the workpiece 3 is qualified through the detection data; when it is necessary to replace different workpieces 3, just take out the mandrel 2 and replace it with a mandrel 2 adapted to the new workpiece 3.

[0023] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

[0024] The parts not detailed in the present utility model are the prior art.

Claims

1. An immersion ultrasonic testing auxiliary device for an annular workpiece, comprising a transition cover (1), a mandrel (2), a workpiece (3) and a chuck (5), wherein: The transition cover (1) is a circular ring with a closed upper end face, the lower end of the transition cover (1) is mounted on the chuck (5), and a positioning hole (11) is provided on the upper end face of the transition cover (1); the upper end of the mandrel (2) is a circular positioning plate (23), the lower end of the mandrel (2) is a cylindrical positioning shaft (21), and the positioning shaft (21) is adapted to the positioning hole (11); the positioning shaft (21) of the mandrel (2) is inserted into the positioning hole (11); the inner hole of the workpiece (3) is sleeved on the positioning plate (23) at the upper end of the mandrel (2), and the lower end face of the workpiece (3) is in contact with the upper end face of the transition cover (1).

2. According to claim 1, a water-immersion ultrasonic detection auxiliary device for annular workpieces is characterized in that: The positioning hole (11) is located at the center of the upper end surface of the transition cover body (1), and the positioning hole (11) is a regular hexagonal through hole.

3. The water-immersion ultrasonic detection auxiliary device for annular workpieces according to claim 1 is characterized in that: The positioning shaft (21) is a regular hexagonal column. The positioning shaft (21) is located at the center of the lower end surface of the positioning plate (23). The length of the positioning shaft (21) is not greater than the depth of the positioning hole (11).

4. The water-immersion ultrasonic detection auxiliary device for annular workpieces according to claim 3 is characterized in that: A groove is provided at the junction of the upper end of the positioning shaft (21) and the positioning plate (23).

5. The water-immersion ultrasonic detection auxiliary device for annular workpieces according to claim 1 is characterized in that: The outer diameter of the positioning plate (23) is matched to the inner hole of the workpiece (3).

6. The water-immersion ultrasonic testing auxiliary device for annular workpieces according to claim 1 is characterized in that: The positioning hole (11), the positioning shaft (21), the positioning plate (23), the workpiece (3) and the chuck (5) are coaxial.

7. The water-immersion ultrasonic detection auxiliary device for annular workpieces according to claim 1 is characterized in that: The axis of the positioning hole (11) is perpendicular to the upper end surface of the transition cover body (1).

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