A valve body class part alignment tool

Abstract

This utility model tooling belongs to the category of machining and inspection tooling, specifically relating to a tooling for aligning valve body parts. It is used for the rapid clamping and straightening alignment of such parts when measuring the cylindricity tolerances of the centering pin holes with a high-precision aligning instrument. The tooling includes: a clamping handle and a spring block, one end of which is fixed to an eccentric conversion plate; the clamping handle is fixed to the eccentric conversion plate via a locking bolt passing through the spring block, with the spring block and clamping handle having a clearance fit; a positioning pin is threadedly connected to the lower surface of the eccentric conversion plate; the valve body part is fixedly mounted on the upper surface of the eccentric conversion plate. Based on the part's shape characteristics, the eccentric conversion plate acts as a carrier, using the positioning pin to achieve the alignment of the rotation center of the centering pin hole, the rotation center of the eccentric conversion plate, the rotation center of the chuck, and the rotation center of the cylindricity instrument, thus realizing rapid positioning and straightening alignment of the part.

Description

Technical Field

[0001] This utility model tooling belongs to the category of mechanical processing and inspection tooling, specifically involving a tooling for aligning valve body parts. It is used for the rapid clamping and straightening alignment of such parts by measuring the cylindricity of the high-precision centering pin hole shape and position tolerances with a cylindricity instrument. Background Technology

[0002] The hydraulic valve body is the mounting body for various control valves, oil filters, nozzles and other parts of the flight control system. It connects various functional components through a hole system to form a circuit for hydraulic and electromagnetic control. It has the characteristics of high integration, high precision and high complexity, and is a typical complex and precision hydraulic structural component in aviation.

[0003] The centering pin hole on the valve body mates with the centering pin, and its shape requires strict precision. Large shape errors will affect the assembly relationship and consequently the product's sealing performance. The cylindricity tolerance of the centering pin hole is generally required to be 0.001-0.002µm. Currently, only a cylindricity tester can meet the required accuracy. However, the cylindricity tester, using a chuck clamp, is only suitable for quick clamping and straightening of rotating parts. For non-rotating parts such as valve bodies, where the measured element is an eccentric hole, clamping with a vise combined with manual visual inspection is necessary for straightening and alignment. This method is difficult to operate, inefficient, and requires a high level of skill from the operator. Utility Model Content

[0004] This utility model's technical solution solves the problem of high difficulty and low efficiency in clamping and aligning the cylindricity tester for non-rotating valve body parts by using an auxiliary clamping fixture, thereby improving testing efficiency. At the same time, this fixture can be adjusted according to the shape characteristics of valve body parts, quickly forming a series of auxiliary clamping fixtures.

[0005] This utility model provides a valve body part alignment fixture, the fixture includes: a clamping handle 1, a spring block 2, one end of the spring block 2 being fixed on the eccentric conversion plate 5;

[0006] The clamping handle 1 is fixed to the eccentric conversion plate by passing through the spring block 2 with the locking bolt 4. The spring block 2 and the clamping handle 1 are in clearance fit.

[0007] The lower surface of the eccentric conversion plate 5 is threadedly connected to the positioning post 6;

[0008] The valve body parts are fixedly installed on the upper surface of the eccentric conversion plate 5.

[0009] Furthermore,

[0010] The upper surface of the eccentric conversion plate 5 is also provided with a number of cylindrical positioning pins 3. The cylindrical positioning pins 3 are fixedly connected to the eccentric conversion plate 5 by bolts and are used to connect with the mounting holes on the valve body parts.

[0011] The cylindrical positioning pin 3 is positioned so that the rotation center of the centering pin hole of the valve body part, the rotation center of the eccentric conversion plate, the rotation center of the chuck, and the rotation center of the cylindricity gauge coincide.

[0012] Furthermore,

[0013] The eccentric conversion plate 5 has several connection holes for fixed connection with the positioning column 6.

[0014] Furthermore,

[0015] The clamping handle 1, the spring block 2, and the locking bolt 4 are an integral assembly, and there are several integral assemblies, which are evenly distributed on the edge of the eccentric conversion plate 5.

[0016] Furthermore,

[0017] The valve body parts have multiple mounting hole bosses on their edges.

[0018] The clamping handle 1 in the overall assembly is pressed against the mounting hole boss to fix the valve body parts.

[0019] Furthermore,

[0020] The mounting holes on the valve body parts are aligned with the cylindrical positioning pins 3 on the eccentric conversion plate 5 to ensure that the bottom surface of the valve body parts is flush with and fits the mating surface of the eccentric conversion plate 5. The clamping handle 1 presses the spring block 2 onto the mounting hole boss of the valve body parts to lock the valve body parts. The tooling together with the valve body parts is then loaded into the cylindricity gauge chuck through the positioning pin 6 and the chuck is locked to achieve quick clamping of non-rotating valve body parts and correction of eccentricity in the length direction.

[0021] The technical solution of this utility model is as follows: Based on the shape characteristics of the part, the eccentric conversion plate 5 is used as a carrier by the positioning pin 3 to complete the coincidence of the rotation center of the centering pin hole, the rotation center of the eccentric conversion plate, the rotation center of the chuck and the rotation center of the cylindricity gauge, so as to realize the rapid positioning and straightening of the part; the spring pressure block 2 realizes the quick and convenient locking of the part. Attached Figure Description

[0022] Figure 1 A cross-sectional view of a valve body alignment fixture provided for an embodiment of this utility model;

[0023] Figure 2 A top view of a valve body alignment fixture provided for an embodiment of this utility model;

[0024] Figure 3 A three-dimensional outline drawing of a valve body alignment fixture provided for an embodiment of this utility model;

[0025] Figure 4 A schematic diagram illustrating the use of a valve body alignment fixture provided in this embodiment of the utility model;

[0026] The components include: 1. Clamping handle; 2. Spring block; 3. Locating pin; 4. Locking bolt; 5. Eccentric conversion plate; 6. Locating post. Detailed Implementation

[0027] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] This utility model provides a tooling for aligning valve body parts, such as... Figure 1 , 2 As shown in Figure 3, the tooling includes: a clamping handle 1 and a spring block 2, one end of which is fixed to the eccentric conversion plate 5;

[0029] The clamping handle 1 is fixed to the eccentric conversion plate by a locking bolt 4 passing through the spring block 2, and the spring block 2 and the clamping handle 1 are in clearance fit.

[0030] The lower surface of the eccentric conversion plate 5 is threadedly connected to the positioning post 6;

[0031] The valve body parts are fixedly installed on the upper surface of the eccentric conversion plate 5.

[0032] The upper surface of the eccentric conversion plate 5 is also provided with a number of cylindrical positioning pins 3. The cylindrical positioning pins 3 are fixedly connected to the eccentric conversion plate 5 by bolts and are used to connect with the mounting holes on the valve body parts.

[0033] The cylindrical positioning pin 3 is positioned so that the rotation center of the centering pin hole of the valve body part, the rotation center of the eccentric conversion plate, the rotation center of the chuck, and the rotation center of the cylindricity gauge coincide.

[0034] The eccentric conversion plate 5 has several connection holes for fixed connection with the positioning column 6.

[0035] The clamping handle 1, the spring block 2, and the locking bolt 4 are an integral assembly, and there are several integral assemblies, which are evenly distributed on the edge of the eccentric conversion plate 5.

[0036] The valve body parts have multiple mounting hole bosses on their edges.

[0037] The clamping handle 1 in the overall assembly is pressed against the mounting hole boss to fix the valve body parts.

[0038] Taking a certain type of valve body tooling as an example, the positioning pin 6 is connected to the eccentric conversion plate 5 by threads, and the two cylindrical positioning pins 3 are fixed to the eccentric conversion plate by bolts. The relative position of the two cylindrical positioning pins is consistent with the relative position between the valve body mounting holes. The eccentricity of the valve body centering pin hole in the length direction is offset by the design of the relative position between the positioning pin 6 and the cylindrical positioning pins 3. The four clamping handles are connected to the eccentric conversion plate 5 by threads. The position of the clamping handles is determined according to the position of the boss in the valve body mounting hole. The spring block 2 and the clamping handle 1 adopt a clearance fit.

[0039] like Figure 4 As shown, during use, align the valve body's mounting hole with the cylindrical positioning pin 3 on the eccentric conversion plate and place it on the eccentric conversion plate 5, ensuring that the bottom surface of the valve body is flush with and fits against the mating surface of the eccentric conversion plate 5. Use the clamping handle to press the spring block against the valve body mounting hole boss to lock the part. Then, the tooling and the part as a whole are installed into the cylindricity gauge chuck through the positioning pin 6 and the chuck is locked. This allows for the quick clamping of non-rotating valve body parts and the correction of eccentricity in the length direction.

[0040] The tooling provided in this embodiment of the utility model can solve the problem of straightening and aligning non-rotating valve body parts on a cylindricity tester. By introducing an eccentric conversion plate onto the cylindricity tester, it can achieve rapid positioning with a single clamping, reduce the technical skill requirements of personnel, simplify operation, improve measurement consistency, and reduce the measurement time from the original average of about 15 minutes per piece to less than 3 minutes. With the help of program measurement, the efficiency is improved by more than 90%.

Claims

1. A tooling for aligning valve body parts, characterized in that, The tooling includes: a clamping handle (1) and a spring block (2), one end of which is fixed on the eccentric conversion plate (5); The clamping handle (1) is fixed to the eccentric conversion plate by passing through the spring block (2) with the locking bolt (4). The spring block (2) and the clamping handle (1) are in clearance fit. The lower surface of the eccentric conversion plate (5) is threaded with a positioning post (6); The valve body parts are fixedly installed on the upper surface of the eccentric conversion plate (5).

2. The alignment fixture for valve body parts according to claim 1, characterized in that, The upper surface of the eccentric conversion plate (5) is also provided with a number of cylindrical positioning pins (3). The cylindrical positioning pins (3) are fixedly connected to the eccentric conversion plate (5) by bolts and are used to connect with the mounting holes on the valve body parts. The cylindrical positioning pin (3) is positioned so that the rotation center of the centering pin hole of the valve body part, the rotation center of the eccentric conversion plate, the rotation center of the chuck and the rotation center of the cylindricity gauge coincide.

3. The alignment fixture for valve body parts according to claim 1, characterized in that, The eccentric conversion plate (5) has several connection holes for fixed connection with the positioning column (6).

4. The alignment fixture for valve body parts according to claim 1, characterized in that, The clamping handle (1), spring block (2) and locking bolt (4) are integral components, and there are several integral components, which are evenly distributed on the edge of the eccentric conversion plate (5).

5. The alignment fixture for valve body parts according to claim 4, characterized in that, The valve body parts have multiple mounting hole bosses on their edges. The clamping handle (1) in the overall assembly is clamped to the mounting hole boss to fix the valve body parts.

6. The alignment fixture for valve body parts according to claim 4, characterized in that, The mounting holes on the valve body parts are aligned with the cylindrical positioning pins (3) on the eccentric conversion plate (5) to ensure that the bottom surface of the valve body parts is flush with the mating surface of the eccentric conversion plate (5). The clamping handle (1) presses the spring block (2) onto the mounting hole boss of the valve body parts to lock the valve body parts. The tooling together with the valve body parts are installed into the cylindricity gauge chuck through the positioning pin (6). The chuck is locked to achieve quick clamping of non-rotating valve body parts and correction of the eccentricity in the length direction.

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