CT (Computed Tomography) detection auxiliary tool and detection method for engine semi-ring piece

Abstract

The invention discloses an engine semi-ring piece CT detection auxiliary tool and a detection method. The engine semi-ring piece CT detection auxiliary tool comprises a base, a positioning plate, a rotating shaft, an indexing sleeve, a rotating handle, a plug pin, a bearing, a baffle and a cover plate. The rotating shaft penetrates through the base and is rotationally connected to the base, a positioning groove matched with the plug pin is formed in the circumferential surface of the rotating shaft, the positioning plate is made of plastic steel and connected with the first axial end of the rotating shaft, and the rotating handle is connected with the second axial end of the rotating shaft. The indexing sleeve is fixedly installed on the end face, close to the positioning plate, of the base, the rotating shaft penetrates through the indexing sleeve, and indexing holes are formed in the outer surface of the indexing sleeve. A semicircular groove used for containing an engine semi-ring piece is formed in the end face of the side, away from the base, of the positioning plate. According to the invention, the indexing sleeve is matched with the rotating shaft to carry out segmented detection on the engine semi-ring piece, then images are spliced as a final result, imaging is stable, parts are not damaged, and ray attenuation is avoided through material selection of the positioning plate and the cover plate.

Description

Technical Field

[0001] The present invention belongs to the field of CT detection technology, and in particular relates to a high-precision and adaptable protective clamping tool and a detection method, which are used for fixing and assisting CT detection of engine semi-ring parts. Background Art

[0002] When performing CT inspection on complex semi-ring parts of an engine, in order to ensure clear and reliable test results, it is first necessary to ensure that the parts are firmly clamped on the rotating platform. Slight shaking will cause the image to be blurred, requiring re-clamping and inspection. Secondly, for larger ring parts, it is impossible to image them all at once.

[0003] Currently, in order to achieve overall inspection of complex semi-ring parts, the parts are wrapped with foam tape to prevent scratches, and the angle is manually adjusted in sections. In order to ensure the stability of the parts, the clamping force is usually relatively large. This process can easily cause irreparable damage to the parts, such as pinching. Furthermore, during CT inspection, the radiation must penetrate the entire thickness of the part within the entire CT slice range. Although the tooling for metal parts has good rigidity, the density of steel parts is high and the radiation attenuation is strong. The clamping position not only increases the thickness of the radiation within the penetration range, but also produces artifacts in the CT image of the part, resulting in blurred image details at the part to be inspected, making it difficult to judge.

[0004] Based on the above reasons, it is necessary to design high-precision and adaptable auxiliary clamping tooling for CT inspection of semi-ring parts with complex engine structures. Summary of the Invention

[0005] The present invention aims to provide an auxiliary tooling and detection method for CT detection of engine semi-ring parts, which solves the problem that large-sized semi-ring parts cannot be imaged in one go, meets the high-precision and adaptable clamping requirements in the CT detection process, ensures that the part to be inspected remains vertical during detection, ensures the stability of the detection part, and does not damage the part during the clamping process. At the same time, the clamping tooling material is required to have low attenuation of radiation and will not cause artifacts or other factors that affect the resolution of the detection image of the part. Moreover, when the detection part is replaced, only simple operations are required to achieve it, which reduces dependence on personnel, ensures the reliability of the detection process, and improves detection efficiency.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] Engine half-ring CT inspection auxiliary tooling, including:

[0008] base;

[0009] a rotating shaft, the rotating shaft passing through the base and being rotatably connected to the base, the first axial end and the second axial end of the rotating shaft being respectively located on different sides of the base, and the circumferential surface of the rotating shaft having a positioning groove;

[0010] A positioning plate, the positioning plate is made of plastic steel and is connected to the first axial end of the rotating shaft. A semicircular groove for accommodating the engine half ring is formed on an end surface of the positioning plate away from the base, and the semicircular groove is coaxial with the rotating shaft;

[0011] An indexing sleeve is fixedly mounted on the end surface of the base close to the positioning plate, the rotating shaft passes through the indexing sleeve, and the outer surface of the indexing sleeve is provided with indexing holes, and the plurality of indexing holes are located on a circumference perpendicular to the axis of the rotating shaft;

[0012] a rotating handle connected to the second axial end of the rotating shaft;

[0013] A latch, the latch being inserted into a positioning groove on the surface of the rotating shaft after passing through the indexing hole on the indexing sleeve;

[0014] The cover plate is detachably connected to the semicircular groove on the positioning plate, and the cover plate is made of plastic steel.

[0015] As a solution, the base includes vertical plates and horizontal plates that are perpendicular to each other, and ribs that are perpendicular to both the vertical plates and the horizontal plates are provided between the vertical plates and the horizontal plates. There is a distance between the ribs and the edge of the horizontal plates, and this distance forms an area on the horizontal plate for clamping the base, and the rotating shaft passes through and is rotatably connected to the vertical plate.

[0016] As a solution, the rotating shaft is rotatably connected to the base via a bearing.

[0017] As a solution, the engine half-ring CT inspection auxiliary tooling also includes a baffle, which is assembled on the rotating shaft and is located between the bearing and the rotating handle to limit the axial position of the rotating shaft on the base.

[0018] As a solution, the rotating shaft is a stepped shaft, a flange hole is opened on the first axial end of the rotating shaft, and the rotating shaft is connected to the positioning plate through bolts in the flange hole.

[0019] As a solution, a positioning cylinder is provided on one end face of the cover plate. When the cover plate is connected to the positioning plate, the positioning cylinder is inserted into the semicircular groove, and the end of the positioning cylinder is close to the engine half ring in the semicircular groove.

[0020] As a solution, the base, the rotating shaft, the indexing sleeve and the latch are made of metal materials.

[0021] The CT inspection method for engine half-ring components uses the aforementioned CT inspection auxiliary tooling and includes the following steps:

[0022] Step 1: Construct a central angle sequence based on the indexing holes at different positions on the indexing sleeve. Divide the engine half ring into multiple segments along its arc length according to the central angle sequence, and each segment serves as an independent CT inspection area.

[0023] Step 2: Turn the rotating handle to drive the rotating shaft to rotate, thereby driving the semicircular groove on the positioning plate to rotate an angle equal to the first central angle value in the central angle sequence in step 1, and insert the pin into the indexing hole on the indexing sleeve until the end of the pin enters the positioning groove on the rotating shaft;

[0024] Step 3: Install the engine half ring into the semicircular groove of the positioning plate, and then cover the semicircular groove with a cover plate;

[0025] Step 4: Inspect the first CT inspection area on the engine half-ring. After completion, pull out the pin and rotate the rotating handle to drive the rotating shaft to rotate the semicircular groove on the positioning plate by an angle equal to the second central angle value in the central angle sequence in step 1. Insert the pin again into the indexing hole and positioning groove, and repeat step 4 until all CT inspection areas are inspected.

[0026] Step 5: Sequentially stitch together the imaging results of all CT detection areas in step 4

[0027] Furthermore, in step three, after the engine half ring is installed in the semicircular groove of the positioning plate, an elastic filler is filled in the gap between the engine half ring and the semicircular groove, and then the semicircular groove is sealed with a cover plate.

[0028] Compared with the prior art, the present invention has the following characteristics:

[0029] 1. The present invention can effectively improve the stability of the engine half-ring parts during CT inspection, improve the safety of the engine half-ring parts during clamping, ensure the accuracy of the engine half-ring parts during CT inspection, avoid damage to the engine half-ring parts during CT inspection, and also avoid the attenuation of the rays by the tooling, which affects the inspection image quality of the parts to be inspected.

[0030] 2. Since the diameter of the engine semi-ring parts is large, the inspection process is partition imaging. The use of the tooling of the present invention can accurately locate the part to be inspected, reducing the time for repeated rework and inspection due to inaccurate positioning and improving inspection efficiency.

[0031] 3. The present invention can provide ideas for the design of clamping tooling for CT inspection of other types of parts, thereby improving the safety and reliability of the non-destructive testing process.

[0032] 4. The present invention provides a design concept for high-precision protective tooling. By using positioning plates and cover plates made of non-metallic materials (such as plastic steel), the versatility of the tooling is improved and the difficulty of protecting the inspected parts is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the clamping auxiliary tooling for CT inspection of engine half-ring parts;

[0034] Figure 2 This is a schematic diagram of the tooling base;

[0035] Figure 3 This is a schematic diagram of the tooling positioning plate;

[0036] Figure 4 It is a schematic diagram of the tooling shaft;

[0037] Figure 5 It is a schematic diagram of the tooling indexing sleeve;

[0038] Figure 6 Schematic diagram of tooling baffle;

[0039] Figure 7 Schematic diagram of tooling cover;

[0040] In the figure: 1-base, 2-positioning plate, 3-rotating shaft, 4-indexing sleeve, 5-rotating handle, 6-latch, 7-bearing, 8-baffle, 9-cover plate, 10-semicircular groove. DETAILED DESCRIPTION

[0041] The present invention is further described below with reference to specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0042] like Figures 1 to 7 As shown, the engine half-ring CT detection auxiliary tooling designed by the present invention includes a base 1, a positioning plate 2, a rotating shaft 3, a dividing sleeve 4, a rotating handle 5, a latch 6, a bearing 7, a baffle 8 and a cover plate 9.

[0043] The base 1 is made of metal and is responsible for ensuring the stability of the clamping. It is located at the bottom of the tooling and has a protruding part on its side for easy clamping (with the rotating platform or detection platform of the CT machine). The center of its top is a through hole with a bearing 7 installed inside for connecting to the fixed shaft 3. Figure 1 and Figure 2 As shown, the base 1 includes vertical plates and horizontal plates that are perpendicular to each other, and ribs that are perpendicular to both the vertical plates and the horizontal plates are provided between the vertical plates and the horizontal plates ( Figure 1 The middle triangular area is a rib plate), and there is a distance between the rib plate and the edge of the cross plate, which forms an area on the cross plate for clamping the base.

[0044] like Figure 5The indexing sleeve 4 is made of metal material and is connected to the base 1 by welding. It is responsible for positioning when the engine half ring is rotated to change the detection part. There is a through hole every 24° on the outer side of the ring for fixing the pin 6, which improves the angle accuracy of segmented detection during the CT process and ensures the position accuracy when stitching images later.

[0045] like Figure 4 The rotating shaft 3 is made of metal and is fixed to the circular hole of the base 1 through the baffle 8. It is responsible for connecting the rotating handle 5 and the positioning plate 2, and ensuring that the positioning plate 2 and the semicircular groove 10 are in a vertical state. The rotating shaft 3 has a circular groove on the side corresponding to the rotating handle 5 for inserting the baffle 8. The indexing hole (through hole) of the indexing sleeve 4 is mapped to a circular groove as a positioning groove for limiting and fixing the latch 6. The rotating handle 5 on the rotating shaft 3 is convenient for single-person operation.

[0046] like Figure 6 The baffle 8 is made of metal material and is fixed to the base 1 by bolts. The baffle 8 consists of two parts, an upper semicircle and a lower semicircle. The upper and lower baffles 8 are embedded in the circular groove of the rotating shaft 3 to fix the rotating shaft 3 on the base 1.

[0047] like Figure 3 The positioning plate 2 is made of plastic steel material and is semicircular in shape. It has a semicircular protrusion on the upper end at the center of the circle. On the circumference of the semicircular protrusion of the positioning plate 2 with a radius of 80mm, there is a through hole every 90°, which is fixed to the rotating shaft 3 by bolts. There is a semicircular groove 10 on the outer side of the circumference for fixing the semi-ring part of the engine to be inspected. The plastic steel material has a low density and can be well separated from the material to be inspected, thereby ensuring the CT image quality of the semi-ring part of the engine to be inspected.

[0048] like Figure 7 The cover plate 9 is made of plastic-steel and is semicircular in shape. It is fastened to the outside of the semicircular groove 10 of the positioning plate 2 by a mortise and tenon joint. The inner surface of the cover plate 9 (the surface corresponding to the semicircular groove 10) is equipped with multiple sets of cylindrical protrusions to fix the engine semi-ring and prevent it from sliding, according to the characteristics of different engine semi-ring components. The low density of the plastic-steel material can effectively separate it from the material of the engine semi-ring to be inspected, ensuring the CT image quality of the engine semi-ring to be inspected.

[0049] The latch 6 is made of metal and is responsible for fixing the rotating shaft 3 at the angle required for CT detection.

[0050] Example:

[0051] The base 1 is made of aluminum alloy and is responsible for ensuring the stability of the clamping. The base 1 is located at the bottom of the tooling and has a protruding part on its side (corresponding to Figure 2The portion between the dotted line and the solid line at the left and right ends of the middle is convenient for clamping with the rotating platform of the CT machine. The center of the top is a through hole with a bearing 7 installed inside for connecting to the fixed rotating shaft 3.

[0052] The indexing sleeve 4 is made of aluminum alloy and is shaped like a circular ring. It is welded to the base 1 and is responsible for positioning the rotating engine half-ring when replacing the detection part. Its outer surface is provided with through-holes every 24° as indexing holes for securing the latch 6. Selecting different through-hole combinations can form an arithmetic sequence of central angles (for example, a continuously distributed through-hole pattern) or a non-uniform sequence of central angles (for example, a non-continuous distribution of through-holes with varying intervals).

[0053] The rotating shaft 3 is made of stainless steel and is fixed to the circular hole of the base 1 through the baffle 8. It is responsible for connecting the rotating handle 5 and the positioning plate 2. The rotating handle 5 has a circular groove on its side for embedding the baffle 8. A circular positioning groove is provided at the mapping position of the through hole of the indexing sleeve 4 for fixing the end of the pin 6. Figure 4 The leftmost end of the rotating shaft 3 is connected to the rotating handle 5. To the right is a circle of circular grooves for embedding the baffle 8. To the right is the part for matching the bearing 7. Further to the right is the part that matches the dividing sleeve 4. This part has a positioning groove machined on it. The rightmost end is the part for connecting with the positioning plate 2.

[0054] The baffle 8 is made of stainless steel and is fixed to the base by bolts. The upper and lower baffles 8 are embedded in the circular groove of the rotating shaft 3 to fix the rotating shaft 3 on the base 1.

[0055] The positioning plate 2 is made of plastic-steel material and is semicircular in shape. It has a semicircular protrusion on the upper end at the center of the circle. On the circle with a radius of 80mm at the center of the semicircle of the positioning plate 2, there is a through hole every 90°, which is fixed to the rotating shaft 3 by bolts. There is a semicircular groove 10 on the outer side of the circumference for fixing the semi-ring part of the engine to be inspected. The low density of the plastic-steel material can be well separated from the material to be inspected, ensuring the CT image quality of the part to be inspected.

[0056] The cover plate 9 is a semicircular plastic-steel material, fastened to the outside of the semicircular groove of the positioning plate 2 by a mortise and tenon joint. Its inner surface features multiple sets of cylinders, adapted to the specific specifications of the engine semi-rings, to secure and prevent them from sliding. Furthermore, the plastic-steel material's low density allows for excellent separation from the material of the semi-rings being inspected, ensuring high-quality CT images of these semi-rings.

[0057] The latch 6 is made of stainless steel and is responsible for fixing the rotating shaft 3 at the angle required for CT detection.

[0058] Determine the number of segments based on the diameter of the engine half-ring and select the corresponding indexing sleeve 4. Before using the fixture, first insert the bearing into the circular hole of the base 1, then insert the shaft 3 into the bearing. Bolt the upper and lower baffles 8 to the side of the rotating handle 5, secure the rotating handle 5 and the positioning plate on both sides, and screw the latch 6 into the indexing sleeve 4. Once the fixture is assembled, it can be fixed without further disassembly.

[0059] When using the tooling, place the engine half-ring in the semicircular groove 10 of the positioning plate 2. Fill the gap between the engine half-ring and the semicircular groove 10 of the positioning plate 2 with elastic filler. Then, snap the cover plate 9 onto the positioning plate 2 to press the engine half-ring to prevent it from moving or detaching. Tighten the latch 6 into the positioning groove of the rotating shaft 3 to fix the angle. When the detection part needs to be changed, first loosen the latch 6, rotate the engine half-ring to the required angle by turning the handle 5, and then tighten the latch 6.

[0060] Any matters not described in detail in the present specification are prior art known to those skilled in the art. Although the above description of the present invention is based on illustrative embodiments to facilitate understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the specific embodiments. As long as various modifications are within the spirit and scope of the present invention as defined and determined by the appended claims, such modifications will be obvious to those skilled in the art, and all inventions and creations utilizing the concepts of the present invention are protected.

Claims

1. Engine half-ring CT inspection auxiliary tooling, characterized by: include: Base (1); a rotating shaft (3), the rotating shaft (3) passing through the base (1) and being rotatably connected to the base (1), the first axial end and the second axial end of the rotating shaft (3) being respectively located on different sides of the base (1), and a positioning groove being provided on the circumferential surface of the rotating shaft (3); A positioning plate (2), the positioning plate (2) is made of plastic steel and is connected to the first axial end of the rotating shaft (3); a semicircular groove (10) for accommodating the engine semi-ring member is formed on an end surface of the positioning plate (2) away from the base (1); the semicircular groove (10) is coaxial with the rotating shaft (3); A graduation sleeve (4), the graduation sleeve (4) is fixedly mounted on the end surface of the base (1) close to the positioning plate (2), the rotating shaft (3) passes through the graduation sleeve (4), and the outer surface of the graduation sleeve (4) is provided with graduation holes, and the plurality of graduation holes are located on a circumference perpendicular to the axis of the rotating shaft (3); A rotating handle (5), the rotating handle (5) being connected to the second axial end of the rotating shaft (3); A latch (6), wherein the latch (6) is inserted into a positioning groove on the surface of the rotating shaft (3) after passing through the indexing hole on the indexing sleeve (4); The cover plate (9) is detachably connected to the semicircular groove (10) on the positioning plate (2), and the cover plate (9) is made of plastic steel.

2. The engine half-ring CT inspection auxiliary tooling according to claim 1 is characterized by: The base (1) comprises a vertical plate and a horizontal plate perpendicular to each other, and a rib plate perpendicular to both the vertical plate and the horizontal plate is provided between the vertical plate and the horizontal plate. There is a distance between the rib plate and the edge of the horizontal plate, and this distance forms an area on the horizontal plate for clamping the base (1). The rotating shaft (3) passes through and is rotatably connected to the vertical plate.

3. The engine half-ring CT inspection auxiliary tooling according to claim 1 is characterized by: The rotating shaft (3) is rotatably connected to the base (1) via a bearing (7).

4. The engine half-ring CT inspection auxiliary tooling according to claim 3 is characterized by: The invention also comprises a baffle (8), which is assembled on the rotating shaft (3) and is located between the bearing (7) and the rotating handle (5) and is used to limit the axial position of the rotating shaft (3) on the base (1).

5. The engine half-ring CT inspection auxiliary tooling according to claim 1 is characterized in that: The rotating shaft (3) is a stepped shaft, a flange hole is formed on the first axial end thereof, and the rotating shaft (3) is connected to the positioning plate (2) via bolts in the flange hole.

6. The engine half-ring CT inspection auxiliary tooling according to claim 1 is characterized in that: A positioning cylinder is provided on one end surface of the cover plate (9). When the cover plate (9) is connected to the positioning plate (2), the positioning cylinder is inserted into the semicircular groove (10), and the end of the positioning cylinder is closely attached to the engine half ring in the semicircular groove (10).

7. The engine half-ring CT inspection auxiliary tooling according to claim 1 is characterized by: The base (1), the rotating shaft (3), the indexing sleeve (4) and the latch (6) are made of metal materials.

8. CT inspection method for engine half ring parts, characterized in that: The CT detection auxiliary tooling according to claim 1 is used, and the following steps are included: Step 1: construct a central angle sequence according to the indexing holes at different positions on the indexing sleeve (4), and divide the engine half ring into multiple sections along its own arc length sequence with reference to the central angle sequence, with each section serving as an independent CT detection area; Step 2: Rotate the rotating handle (5) to drive the rotating shaft (3) to rotate, thereby driving the semicircular groove (10) on the positioning plate (2) to rotate an angle equal to the value of the first central angle in the central angle sequence in step 1, and insert the pin (6) into the indexing hole on the indexing sleeve (4) until the end of the pin (6) enters the positioning groove on the rotating shaft (3); Step 3: Install the engine half ring into the semicircular groove (10) of the positioning plate (2), and then cover the semicircular groove (10) with a cover plate (9); Step 4: inspect the first CT inspection area on the engine half ring. After completion, pull out the pin (6), rotate the rotating handle (5) to drive the rotating shaft (3) to rotate, thereby driving the semicircular groove (10) on the positioning plate (2) to rotate an angle equal to the second central angle value in the central angle sequence in step 1, insert the pin (6) into the indexing hole and the positioning groove again, and repeat step 4 until the inspection work of all CT inspection areas is completed; Step 5: Sequentially stitch together the imaging results of all CT detection areas in step 4.

9. The engine half-ring CT inspection method according to claim 8, characterized in that: In the step 3, after the engine half ring is installed in the semicircular groove (10) of the positioning plate (2), an elastic filler is filled in the gap between the engine half ring and the semicircular groove (10), and then the semicircular groove (10) is covered with a cover plate (9).

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