A special fixture for machining aerospace parts on a lathe

Abstract

This utility model provides a special fixture for lathe machining of aerospace parts, including: a fixture body, a workpiece, clamping components, and supporting components; the fixture body has a workpiece positioning hole in the middle, the workpiece is movably mounted on the upper surface of the fixture body, workpiece locking screws are arranged adjacent to the side of the fixture body, and supporting components are evenly distributed on the lower surface of the fixture body. When used with a turning-milling composite CNC lathe, the workpiece is accurately positioned and clamped quickly and conveniently, which is suitable for batch processing and production, reducing the workload of employees while improving processing quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathe machining fixture technology, and more specifically, to a special fixture for lathe machining of aerospace parts. Background Technology

[0002] As a key component of the aerospace manufacturing industry, aerospace parts require extremely high precision and quality in their machining. Currently, the machining of irregularly shaped aerospace parts is mainly carried out using CNC milling machines, but this method has many problems: First, the workpiece clamping is unstable, and vibrations are easily generated during machining, affecting machining accuracy; second, workpiece positioning is difficult, and precise positioning cannot be achieved, with positioning errors often exceeding 0.05mm; third, the clamping operation is complex, requiring repeated adjustments, which is not conducive to mass production; finally, the machining efficiency is low, machining errors caused by human factors occur frequently, and the labor intensity of workers is high.

[0003] Existing fixture body equipment mainly includes general-purpose fixtures and special-purpose fixtures. General-purpose fixtures are highly adaptable but have poor positioning accuracy, while special-purpose fixtures have higher accuracy but are complex in structure and expensive. Moreover, most special-purpose fixture bodies lack effective anti-loosening mechanisms and support adjustment functions, which cannot meet the high-precision and high-efficiency processing requirements of aerospace parts. Therefore, it is necessary to provide a special fixture for lathe processing of aerospace parts to solve the above problems. Utility Model Content

[0004] This invention aims to solve the problems of poor positioning accuracy, unstable clamping, complex clamping, unfavorable for mass production, and high labor intensity of existing aerospace parts processing fixtures.

[0005] This utility model provides a special fixture for machining aerospace parts on a lathe, comprising: a fixture body, a workpiece, a clamping component, and a supporting component; the fixture body has a workpiece positioning hole in the middle, a workpiece is movably mounted on the upper surface of the fixture body, workpiece locking screws are arranged adjacent to each other on the side of the fixture body, and supporting components are evenly distributed on the lower surface of the fixture body.

[0006] Furthermore, the fixture body includes: a workpiece positioning hole and screw holes; the workpiece positioning hole is a square through hole structure, the fixture body is provided with two screw holes, and the bottom of the fixture body is a planar support platform.

[0007] Furthermore, the workpiece is embedded in the workpiece positioning hole.

[0008] Furthermore, the clamping component includes: workpiece locking screws; there are two locking screws distributed on adjacent sides of the fixture body and embedded in screw holes.

[0009] Furthermore, the support component includes: a support pad and an adjusting bolt; a total of 3 support pads are evenly distributed on the bottom surface of the fixture body, and the adjusting bolt passes through the support pad and is threadedly connected to the fixture body.

[0010] Beneficial effects:

[0011] 1. In the utility model, the positioning pins in the positioning component are evenly distributed on the two corners of the workpiece positioning hole, which can realize the precise positioning of the workpiece in the X, Y and Z directions. The positioning accuracy can be controlled within 0.02mm, providing a reliable guarantee for the precision machining of aerospace parts.

[0012] 2. In the utility model, the support pad in the support component adopts a three-point support method to ensure the stable installation of the fixture body on the lathe. The adjusting bolt can be finely adjusted according to the flatness of the lathe table to eliminate the tilting of the fixture body caused by the unevenness of the lathe table. The overall structure is simple and compact, and the clamping operation is convenient, which significantly improves production efficiency and reduces the labor intensity of workers. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the fixture body structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the workpiece of this utility model;

[0016] Figure 4 This is a schematic diagram of the workpiece locking screw of this utility model;

[0017] Figure 5 This is a schematic diagram of the supporting component structure of this utility model;

[0018] In the figure, the correspondence between the component names and the attached drawing numbers is as follows: jig body 1, workpiece positioning hole 101, screw hole 102, workpiece 2, workpiece locking screw 3, support component 4, support pad 401, adjusting bolt 402. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] As attached Figure 1 To be continued Figure 5 As shown:

[0021] This embodiment provides a special fixture for machining aerospace parts on a lathe, comprising a fixture body 1, a workpiece 2, workpiece locking screws 3, and support members 4; the fixture body 1 has a workpiece positioning hole 101 in the middle, the workpiece 2 is movably mounted on the upper surface of the fixture body 1, the workpiece locking screws 3 are arranged adjacent to each other on the side of the fixture body 1, and the support members 4 are evenly distributed on the lower surface of the fixture body 1.

[0022] Preferably, the fixture body 1 includes: a workpiece positioning hole 101 and screw holes 102; the workpiece positioning hole 101 is a square through hole structure, and the fixture body 1 is provided with two screw holes 102.

[0023] Preferably, the workpiece 2 is embedded in the workpiece positioning hole 101.

[0024] In a specific embodiment: the fixture body 1 is made of high-strength alloy steel. The size of the workpiece positioning hole 101 is determined according to the external dimensions of the aerospace part workpiece 2, and the tolerance is controlled within ±0.01mm. The workpiece 2 is movably connected to the workpiece positioning hole 101, and the depth of the screw hole 102 is 2-3mm.

[0025] Preferably, the workpiece locking screw 3 includes: workpiece locking screw 3; a total of 2 workpiece locking screws 3 are provided and distributed on adjacent sides of the fixture body 1.

[0026] In a specific embodiment: the workpiece locking screw 3 is made of high-strength alloy steel. This screw features an M10×1.25 fine-pitch thread design. This precision thread fit provides higher preload control accuracy compared to coarse-pitch threads, while effectively preventing self-loosening under vibration. The inner wall of the screw hole 102 is machined with a corresponding fine-pitch internal thread, forming a clearance fit with the locking screw 3, allowing the screw to rotate freely within the hole without significant radial wobble, thus achieving a movable connection with the fixture body 1.

[0027] Preferably, the support member 4 includes: a support pad 401 and an adjusting bolt 402; the support pad 401 is provided with 3 evenly distributed on the bottom surface of the fixture body 1, and the adjusting bolt 402 passes through the support pad 401 and is threadedly connected to the fixture body 1.

[0028] In a specific embodiment: the support pad 401, as a key load-bearing component of the fixture, is precision-machined from a high-strength wear-resistant alloy material. The support pad 401 has an M12 internal threaded hole at its top center, which is reliably connected via a high-strength stainless steel adjusting bolt 402. The two work together to achieve a height adjustment range of ±5mm, effectively compensating for the 0.1-0.5mm unevenness error of the lathe table caused by long-term use. The upper part of the adjusting bolt 402 is rigidly connected to the mounting hole at the bottom of the fixture body 1 via a precision thread.

[0029] Working principle: The fixture body 1 is clamped and fixed by the lathe three-jaw chuck, and the workpiece 2 is placed into the workpiece positioning hole 101 from above. Then, the workpiece locking screw 3 is operated to firmly clamp the workpiece. The adjusting bolt 402 in the support component 4 can adjust the level of the fixture body as needed. The whole clamping process is simple and quick, with high positioning accuracy and reliable clamping. It can meet the requirements of high-precision lathe machining of aerospace parts and significantly improve production efficiency and machining quality.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A special fixture for machining aerospace parts on a lathe, comprising: The fixture body (1), workpiece (2), workpiece locking screw (3) and support member (4) are characterized in that: a workpiece positioning hole (101) is provided in the middle of the fixture body (1), a workpiece (2) is movably installed on the upper surface of the fixture body (1), a workpiece locking screw (3) is provided adjacent to the side of the fixture body (1), and support members (4) are evenly distributed on the lower surface of the fixture body (1).

2. The special fixture for machining aerospace parts on a lathe as described in claim 1, characterized in that: The fixture body (1) includes: a workpiece positioning hole (101) and a screw hole (102); the workpiece positioning hole (101) is a square through hole structure, and the fixture body (1) is provided with two screw holes (102).

3. The special fixture for machining aerospace parts on a lathe as described in claim 1, characterized in that: The workpiece (2) is embedded in the workpiece positioning hole (101).

4. The special fixture for machining aerospace parts on a lathe as described in claim 1, characterized in that: The workpiece locking screw (3) includes: locking screw (301); there are two locking screws (301) distributed on the adjacent sides of the fixture body (1) and embedded in the screw hole (102).

5. The special fixture for machining aerospace parts on a lathe as described in claim 1, characterized in that: The support member (4) includes: a support pad (401) and an adjusting bolt (402); the support pad (401) has three evenly distributed support pads on the bottom surface of the fixture body (1), and the adjusting bolt (402) passes through the support pad (401) and is threadedly connected to the fixture body (1).

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