An industrial CT inspection method and auxiliary tooling for large and complex aluminum precision castings

Abstract

The present invention discloses an industrial CT detection method and auxiliary tooling for large and complex aluminum precision castings. The auxiliary tooling for detecting large and complex aluminum precision castings is used, including: auxiliary rings for auxiliary support of the middle and side edges of the castings and a support table for vertical support of the castings, forming a step for convenient reversing CT scanning and detection of the castings without disassembling the auxiliary tooling. The castings are auxiliary supported by the auxiliary rings for auxiliary support of the middle and side edges of the castings, and the support table for vertical support of the castings. When reversing inspection of castings with larger vertical dimensions is required, there is no need to disassemble the support table or the auxiliary rings a second time, thereby improving the detection efficiency and meeting the needs of mass production. It solves the problem that the bull's eye universal ball needs to be disassembled a second time when the casting is supported from top to bottom during reversing inspection.

Description

Technical Field

[0001] The invention relates to an industrial CT detection method and detection auxiliary tooling for large and complex aluminum precision castings, belonging to the technical field of casting detection. Background Art

[0002] For castings formed by aluminum alloy casting, since the castings have large vertical dimensions and complex structures, when placed directly on the industrial CT turntable, they cannot be firmly in contact with the industrial CT turntable, and auxiliary tooling is required to support the castings.

[0003] In the industrial CT detection device and detection method based on the 3D ball detection platform, which is disclosed in Chinese patent publication number CN106018443A, the technology adopted is: the bull's eye universal ball on the upper and lower support frames is in close contact with the outer ball shell of the spherical workpiece tray to play a supporting and guiding role; although the bull's eye universal ball can provide support from above and below, when it is necessary to reversing inspection of castings with larger vertical dimensions, there is a problem of needing to disassemble and assemble the bull's eye universal ball twice, which reduces the detection efficiency and cannot meet the needs of mass production. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an industrial CT detection method and detection auxiliary tooling for large and complex aluminum precision castings.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides an industrial CT inspection method for large and complex aluminum precision castings, which uses auxiliary tooling for inspection of large and complex aluminum precision castings, including: auxiliary rings for auxiliary support of the middle and side edges of the castings and a support platform for vertical support of the castings, forming a step that facilitates reversing CT scanning inspection of the castings without disassembling the auxiliary tooling.

[0007] The step of performing reversing CT scanning on the casting is divided into two steps: root detection and head detection.

[0008] The root detection step comprises: placing the root of the casting on the support platform of the lower support plate through the through hole in the middle of the auxiliary circular ring for vertical contact support, the through hole of the auxiliary circular ring providing auxiliary support for the side of the middle part of the casting, forming an effective root detection area in the space between the bottom surface of the auxiliary circular ring and the support layer of the top surface of the support platform, and using industrial CT scanning to detect the effective root detection area of ​​the casting;

[0009] The head detection steps are as follows: the casting is lifted from the through hole in the middle of the auxiliary ring, the casting is reversed, and the head of the casting is placed on the support platform of the lower support plate through the through hole in the middle of the auxiliary ring for vertical contact support. The through hole of the auxiliary ring provides auxiliary support for the side of the middle of the casting, and an effective head detection area is formed in the space between the bottom surface of the auxiliary ring and the support rod layer from the top surface of the support platform. The effective head detection area of ​​the casting is detected using industrial CT scanning.

[0010] An auxiliary tool for detecting large and complex aluminum precision castings, comprising:

[0011] A lower support plate, the top surface of which is fixedly connected to a support platform, the support platform being located in the middle of the lower support plate;

[0012] A support rod, the bottom end of which is fixedly connected to the top surface of the lower support plate;

[0013] The auxiliary ring is fixedly connected with the top of the support rod and the bottom surface of the auxiliary ring. A through hole is provided in the middle of the auxiliary ring to form a window for installing the casting.

[0014] There are three support rods, which are inclined to narrow from the bottom to the top to support the auxiliary ring.

[0015] The auxiliary ring is made of hard PVC or PP material; the lower support plate, support platform and support rod are made of wood.

[0016] The lower support plate is in a disc shape.

[0017] The outer periphery of the lower support plate is provided with dovetail grooves, and the dovetail grooves are four in a circumferential array and spaced apart.

[0018] The bottom end and the top end of the support rod are fixedly connected to the lower support plate and the auxiliary ring via mortise and tenon structures.

[0019] The beneficial effects of the present invention are as follows: since the casting is supported by auxiliary rings on the middle side of the casting, and the support platform supports the casting vertically, when a reversal inspection of a casting with a larger vertical dimension is required, there is no need to disassemble and assemble the support platform or the auxiliary ring for a second time, thereby improving the inspection efficiency, meeting the needs of mass production, and solving the problem that the bull's eye universal ball needs to be disassembled and assembled for a second time when the casting is supported from top to bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main view of the detection auxiliary tooling of the present invention;

[0021] Figure 2 1 is a schematic top view of the detection auxiliary tooling of the present invention;

[0022] Figure 3 It is a schematic diagram of the main view of the casting with the root downward on the auxiliary inspection tooling.

[0023] Figure 4 This is a schematic diagram of the main view of the casting with the head downward on the auxiliary inspection tooling.

[0024] In the figure: 1-lower support plate; 11-support platform; 12-dovetail groove; 2-support rod; 3-auxiliary ring; 31-through hole; 5-casting. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0026] like Figures 1 to 4 shown.

[0027] The present invention provides an industrial CT inspection method for large and complex aluminum precision castings, using an auxiliary inspection tool for large and complex aluminum precision castings, including the following steps:

[0028] Step 1: Root inspection: The root of the casting 5 is placed on the support platform 11 of the lower support plate 1 through the through hole 31 in the middle of the auxiliary ring 3 for vertical contact support. The through hole 31 of the auxiliary ring 3 provides auxiliary support for the side of the middle part of the casting 5. The space between the bottom surface of the auxiliary ring 3 and the two layers of support rods on the top surface of the support platform 11 constitutes an effective root inspection area. Use industrial CT scanning to inspect the effective root inspection area of ​​the casting 5;

[0029] Step 2, head detection: the casting 5 is lifted from the through hole 31 in the middle of the auxiliary ring 3, the casting 5 changes direction, and the head of the casting 5 is placed on the support platform 11 of the lower support plate 1 through the through hole 31 in the middle of the auxiliary ring 3 for vertical contact support. The through hole 31 of the auxiliary ring 3 provides auxiliary support for the side of the middle part of the casting 5, and an effective head detection area is formed in the space between the bottom surface of the auxiliary ring 3 and the top surface of the support platform 11. Use industrial CT scanning to detect the effective head detection area of ​​the casting 5.

[0030] Since the casting 5 is auxiliary supported by the auxiliary ring 3 on the side of the middle part of the casting 5, and the support platform 11 supports the casting 5 vertically, when it is necessary to reversing the inspection of the casting with larger vertical dimensions, there is no need to disassemble and assemble the support platform 11 or the auxiliary ring 3 for the second time, which improves the inspection efficiency and meets the needs of mass production. It solves the problem of the bull's eye universal ball being supported from top and bottom and requiring the bull's eye universal ball to be disassembled and assembled for the second time when the casting is reversing.

[0031] The present invention provides an auxiliary tool for detecting large and complex aluminum precision castings, comprising:

[0032] The lower support plate 1 is made of a rigid material such as wood, whose rigidity is less than that of the casting 5. The top surface of the lower support plate 1 is fixedly connected to a support platform 11 by mortise and tenon joints or bonding. The support platform 11 is located in the middle of the lower support plate 1. The support platform 11 is made of a rigid material such as wood, whose rigidity is less than that of the casting 5. The use of wood can protect the casting 5 when supporting it.

[0033] The lower support plate 1 is in the shape of a disc, and a dovetail groove 12 is provided on the outer periphery of the lower support plate 1. The dovetail grooves 12 are four spaced apart in a circumferential array, so that the lower support plate 1 can be fixed to the industrial CT turntable using bolts and nuts through the dovetail grooves 12.

[0034] It also includes a support rod 2, which is made of rectangular wood. The bottom end of the support rod 2 is fixedly connected to the top surface of the lower support plate 1 by mortise and tenon joints or bonding.

[0035] The auxiliary ring 3 also includes a central through-hole 31, which forms a window for the casting 5. The top of the support rods 2 are fixedly connected to the bottom of the auxiliary ring 3 via mortise and tenon joints or adhesive bonding. The support rods 2 are three in number and taper from the bottom to the top, supporting the auxiliary ring 3. The auxiliary ring 3 is made of materials such as rigid PVC / PP and aluminum alloy.

[0036] The lower support plate 1, support platform 11 and support rod 2 made of wood, and the auxiliary ring 3 made of hard PVC / PP and aluminum alloy are all made of low-density materials to reduce the impact on light transmission during subsequent CT inspection.

[0037] The mortise and tenon connection is adopted mainly to ensure that the tooling does not affect the radiographic quality of the casting 5 .

Claims

1. An industrial CT inspection method for large and complex aluminum precision castings, characterized in that: A large and complex aluminum precision casting detection auxiliary tooling is used, comprising: an auxiliary ring (3) for auxiliary support of the middle side of the casting (5) and a support table (11) for vertically supporting the casting (5), forming a step for convenient reversing CT scanning detection of the casting (5) without disassembling the auxiliary tooling; The step of performing a reversing CT scanning test on the casting (5) is divided into two steps: root detection and head detection; The root detection step is as follows: the root of the casting (5) is placed on the support platform (11) of the lower support plate (1) through the through hole (31) in the middle of the auxiliary ring (3) for vertical contact support, the through hole (31) of the auxiliary ring (3) provides auxiliary support for the side of the middle of the casting (5), and an effective root detection area is formed in the space between the bottom surface of the auxiliary ring (3) and the support rod (2) layer on the top surface of the support platform (11), and the effective root detection area of ​​the casting (5) is detected by industrial CT scanning; The head detection step is as follows: the casting (5) is lifted from the through hole (31) in the middle of the auxiliary circular ring (3), the casting (5) is reversed, and the head of the casting (5) is placed on the support platform (11) of the lower support plate (1) through the through hole (31) in the middle of the auxiliary circular ring (3) for vertical contact support, the through hole (31) of the auxiliary circular ring (3) provides auxiliary support for the side of the middle of the casting (5), and an effective head detection area is formed in the space between the bottom surface of the auxiliary circular ring (3) and the support rod (2) layer on the top surface of the support platform (11), and the effective head detection area of ​​the casting (5) is detected by industrial CT scanning.

2. The industrial CT inspection method for large and complex aluminum precision castings according to claim 1, characterized in that: The auxiliary tooling for detecting large and complex aluminum precision castings includes: A lower support plate (1), wherein the top surface of the lower support plate (1) is fixedly connected to a support platform (11), and the support platform (11) is located in the middle of the lower support plate (1); A support rod (2), the bottom end of the support rod (2) is fixedly connected to the top surface of the lower support plate (1); The auxiliary ring (3) is fixedly connected to the top of the support rod (2) and the bottom surface of the auxiliary ring (3). A through hole (31) is provided in the middle of the auxiliary ring (3) to form a window for installing the casting (5).

3. The industrial CT inspection method for large and complex aluminum precision castings according to claim 2, characterized in that: There are three support rods (2) which are inclined to narrow from the bottom to the top to support the auxiliary ring (3).

4. The industrial CT inspection method for large and complex aluminum precision castings according to claim 2, wherein: The auxiliary ring (3) is made of hard PVC or PP material; the lower support plate (1), the support platform (11) and the support rod (2) are made of wood.

5. The industrial CT inspection method for large and complex aluminum precision castings according to claim 2, characterized in that: The lower support plate (1) is in the shape of a disc.

6. The industrial CT inspection method for large and complex aluminum precision castings according to claim 2, characterized in that: The outer periphery of the lower support plate (1) is provided with dovetail grooves (12), and the dovetail grooves (12) are four in a circumferential array and spaced apart.

7. The industrial CT inspection method for large and complex aluminum precision castings according to claim 2, characterized in that: The bottom end and the top end of the support rod (2) are fixedly connected to the lower support plate (1) and the auxiliary ring (3) via mortise and tenon structures.

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