An engine elbow casting inspection tool

Abstract

The utility model belongs to foundry inspection technical field relates to a kind of inspection tool for engine elbow pipe casting, including locating seat, left side plate and right side plate are correspondingly provided in the left and right sides of locating seat, the rear side of locating seat is equipped with rear side plate, let groove matched with engine elbow pipe casting is equipped on left side plate, and the front end of left side plate and right side plate is aligned and set in the middle of front-rear direction of locating seat, the front end of right side plate is also equipped with locating rod, the top of locating seat front end is correspondingly equipped with two locating blocks, the left side of right side plate is evenly distributed with several detection columns along the bending arc shape of engine elbow pipe casting, the utility model structure is simple, test is convenient, and it can be used to the corresponding detection surface of specific engine elbow pipe casting for batch inspection, so as to be favorable for the rapid screening of qualified casting, and provide correction direction to unqualified casting, greatly improve the detection efficiency of casting.

Description

Technical Field

[0001] This utility model belongs to the field of casting inspection technology, specifically, it relates to an inspection fixture for bent pipe castings for engines. Background Technology

[0002] like Figure 1 The engine bend casting shown includes a bend with a top flange at the top and a front flange at the front. A branch pipe is located on the left side of the bend, with a left flange at the end of the branch pipe furthest from the bend. The rear and right sides of the bend, and the lower side of the top flange, are the three inspection surfaces of the engine bend casting. The right, bottom, and rear sides of the front flange are the three positioning surfaces of the engine bend casting. When inspecting the dimensions of this engine bend casting, the dimensions of the inspection surfaces corresponding to the curved surfaces, namely the rear and right sides of the bend, cannot be directly measured. Furthermore, for batch casting inspection, the existing 3D scanning method suffers from low inspection efficiency, impacting production delivery schedules.

[0003] Therefore, there is an urgent need in this field to develop a method for batch dimensional inspection of the aforementioned engine bend castings, so as to quickly screen out qualified castings and provide correction directions for unqualified castings, thereby significantly improving the inspection efficiency of castings. Utility Model Content

[0004] The purpose of this invention is to provide an inspection fixture for bent pipe castings for engines, in order to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An inspection fixture for an engine bend casting includes a positioning seat. A left side plate and a right side plate are correspondingly arranged on the left and right sides of the positioning seat, and a rear side plate is provided on the rear side of the positioning seat. The left side plate has a groove that matches the left side portion of the engine bend casting. The front ends of the left and right side plates are aligned and positioned at the center of the positioning seat in the front-rear direction. The front ends of the left and right side plates correspond to and match the positioning surface on the rear side of the front flange of the engine bend casting. A positioning rod is also provided on the front end of the right side plate, and the positioning rod corresponds to the positioning surface on the right side of the front flange of the engine bend casting. The positioning base is configured with two positioning blocks at its front end. The top surface of the positioning blocks corresponds to and is matched with the positioning surface on the lower side of the front flange of the engine bend casting. Several detection columns are evenly distributed on the left side of the right side plate along the curved direction of the engine bend casting. The detection columns correspond to and are matched with the detection surface on the right side of the bend of the engine bend casting. The front side of the rear side plate corresponds to and is matched with the detection surface on the rear side of the bend of the engine bend casting. The top surfaces of the rear side plate and the right side plate correspond to and are matched with the detection surface at the bottom of the top flange of the engine bend casting.

[0006] Preferably, the positioning seat, rear side plate, left side plate and right side plate are integrally formed, which facilitates processing and helps to ensure the strength of the device.

[0007] Preferably, the top center of the right side plate is provided with an arc-shaped groove, the arc-shaped direction of which matches the arc-shaped direction of the engine bending pipe casting, so as to facilitate the handling of the engine bending pipe casting.

[0008] The working principle of this utility model is as follows: first, the rear positioning surface, right positioning surface, and lower positioning surface of the front flange of the engine bending pipe casting are respectively aligned with the front surfaces of the left and right plates, the left side of the positioning rod, and the top surface of the positioning block, and are in close contact with each other. In this way, the processing reference square bottom part of the engine bending pipe casting (i.e., the front flange of the engine bending pipe casting) has been positioned.

[0009] Next, align the inspection surface on the right side of the engine bend casting with the inspection post on the left side of the right side plate. Align the inspection surface on the rear side of the bend of the engine bend casting with the front side of the rear side plate. Align the inspection surface at the bottom of the top flange of the engine bend casting with the top surfaces of the rear and right side plates. Observe the gap between each inspection surface and its opposite surface. If necessary, use a feeler gauge for measurement. A gap less than 0.3 mm is considered a qualified casting. A gap greater than 0.3 mm requires recalibration. After calibration, use the inspection fixture for inspection.

[0010] Compared with the prior art, the utility model has the following beneficial effects: This utility model has a simple structure and is easy to test. It can be used for batch inspection of the corresponding inspection surfaces of the engine bend castings mentioned in the background art, thereby facilitating the rapid screening of qualified castings and providing correction directions for unqualified castings, and greatly improving the inspection efficiency of castings. Attached Figure Description

[0011] The utility model will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional model of the bent pipe casting for the engine in the embodiment; Figure 2 yes Figure 1 A 3D model of the machined bent pipe casting for the engine. Figure 3 This is a three-dimensional structural solid view of the bent pipe casting for the engine in the embodiment; Figure 4 yes Figure 3 A three-dimensional structural solid image of the bent pipe casting for the engine from another perspective; Figure 5 This is a three-dimensional structural schematic diagram of the present invention in the embodiment; Figure 6 This is a schematic diagram of the assembly structure of the present invention when inspecting the bent pipe casting for the engine in an embodiment.

[0012] In the diagram: 1. Positioning seat; 2. Left side plate; 3. Right side plate; 4. Rear side plate; 5. Groove; 6. Positioning rod; 7. Positioning block; 8. Detection column; 9. Arc groove; 10. Bend; 11. Top flange; 12. Front flange; 13. Branch pipe; 14. Left flange. Detailed Implementation

[0013] The utility model will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the utility model without inventive effort to obtain all other embodiments should be included within the protection scope of the utility model.

[0014] Example 1 like Figures 1-4As shown, the casting is an engine bend casting, which includes a bend 10. The top of the bend 10 has a top flange 11, and the front end of the bend 10 has a front flange 12. A branch pipe 13 is also provided on the left side of the bend 10, and a left flange 14 is provided at the end of the branch pipe 13 away from the bend 10. The rear and right sides of the bend 10 and the lower side of the top flange 11 are the three inspection surfaces of the engine bend casting. In this embodiment, the three inspection surfaces are sequentially labeled as inspection surface c, inspection surface a, and inspection surface b. The right side, bottom side, and rear side of the front flange 12 are the three positioning surfaces of the engine bend casting. In this embodiment, the three positioning surfaces are sequentially labeled as positioning surface d, positioning surface f, and positioning surface e. The bend 10 has a wall thickness of 3mm. The engine bend casting has been scribing and 3D scanned to show the position of the top flange 11 (see figure). Figure 1 The deviation (indicated by the middle arrow) and the deformation to one side will lead to two problems: first, the flange wall thickness will be out of tolerance after subsequent machining; second, the position of the holes on both sides from the centerline will be out of tolerance after machining (see...). Figure 2 (as indicated by the middle arrow), so the position and dimensions of the top flange 11 of the engine bend casting must be controlled.

[0015] like Figure 5 As shown, this embodiment provides an inspection fixture for engine bend castings, specifically for the inspection of batch castings of the aforementioned products. The fixture includes a positioning base 1, with a left side plate 2 and a right side plate 3 correspondingly arranged on its left and right sides, and a rear side plate 4 on its rear side. The left side plate 2 has a groove 5 that matches the bifurcated pipe 13 and left flange 14 on the left side of the engine bend casting. The front ends of the left side plate 2 and right side plate 3 are aligned and positioned at the center of the positioning base 1 in the front-rear direction. The front ends of the left side plate 2 and right side plate 3 correspond to and match the positioning surface e on the rear side of the front flange 12 of the engine bend casting. A positioning rod 6 is also provided on the front end of the right side plate 3. The positioning rod 6 is aligned with the positioning surface e on the rear side of the engine bend casting. The positioning surface d on the right side of the front flange 12 of the pipe casting corresponds to and matches the positioning surface d. The front end of the top of the positioning seat 1 is provided with two positioning blocks 7. The top surface of the positioning block 7 corresponds to and matches the positioning surface f on the lower side of the front flange 12 of the engine bending pipe casting. Three detection columns 8 are evenly distributed on the left side of the right side plate 3 along the curved direction of the engine bending pipe casting. The detection columns 8 correspond to and match the detection surface a on the right side of the bending pipe 10 of the engine bending pipe casting. The front side of the rear side plate 4 corresponds to and matches the detection surface c on the rear side of the bending pipe 10 of the engine bending pipe casting. The top surfaces of the rear side plate 4 and the right side plate 3 correspond to and match the detection surface b at the bottom of the top flange 11 of the engine bending pipe casting.

[0016] In this embodiment, the positioning seat 1, rear side plate 4, left side plate 2, and right side plate 3 are integrally formed, which facilitates processing and helps ensure the strength of the device. The top center of the right side plate 3 is provided with an arc-shaped groove 9, the arc direction of which matches the arc direction of the engine bending pipe casting, facilitating the handling of the engine bending pipe casting.

[0017] like Figure 6 As shown: The working principle of this utility model is that the rear side (i.e., positioning surface e), the right side (i.e., positioning surface d), and the lower side (i.e., positioning surface f) of the front flange 12 of the engine bending pipe casting are respectively aligned with the front surfaces of the left side plate 2 and the right side plate 3, the left side of the positioning rod 6, and the top surface of the positioning block 7, and are mutually fitted. In this way, the processing reference square bottom part of the engine bending pipe casting (i.e., the front flange 12 of the engine bending pipe casting) has been positioned.

[0018] Next, align the inspection surface a on the right side of the engine bend casting with the inspection post 8 on the left side of the right side plate 3. Align the inspection surface c on the rear side of the bend 10 of the engine bend casting with the front side of the rear side plate 4. Align the inspection surface b at the bottom of the top flange 11 of the engine bend casting with the top surfaces of the rear side plate 4 and the right side plate 3. Observe the gap between each inspection surface and its opposite surface. If necessary, a feeler gauge can be used for measurement. A gap less than 0.3 mm is considered a qualified casting. A gap greater than 0.3 mm needs to be recalibrated. After calibration, use this utility model for testing.

[0019] The above description is merely a preferred embodiment of the present invention and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An engine elbow casting inspection tool, comprising a positioning seat, left and right sides of the positioning seat are provided with left and right side plates respectively, and the back side of the positioning seat is provided with a back side plate, characterized in that: The left side plate has a groove that matches the left side of the engine bend casting. The front ends of the left and right side plates are aligned and positioned at the center of the positioning seat in the front-rear direction. The front ends of the left and right side plates correspond to and match the positioning face on the rear side of the front flange of the engine bend casting. The front end of the right side plate also has a positioning rod that corresponds to and matches the positioning face on the right side of the front flange of the engine bend casting. The top front end of the positioning seat has two positioning blocks that correspond to and match the positioning face on the lower side of the front flange of the engine bend casting. The left side of the right side plate has several detection columns evenly distributed along the curved direction of the engine bend casting. The detection columns correspond to and match the detection face on the right side of the bend of the engine bend casting. The front side of the rear side plate corresponds to and matches the detection face on the rear side of the bend of the engine bend casting. The top ends of the rear and right side plates correspond to and match the detection face on the bottom of the top flange of the engine bend casting.

2. The inspection fixture for an engine bent pipe casting according to claim 1, characterized in that: The positioning base, rear side plate, left side plate, and right side plate are integrally formed.

3. The inspection fixture for an engine bent pipe casting according to claim 1 or 2, characterized in that: The top center of the right side plate is provided with an arc-shaped groove, and the arc-shaped direction of the arc-shaped groove matches the arc-shaped direction of the engine bending pipe casting.

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