Four-axis machining tool for aviation products

Abstract

The utility model relates to the technical field of clamp tools, in particular to a four-axis machining tool for aviation products, which comprises a four-axis rotary table and a tool frame. The tool frame is detachably connected with the output end of the four-axis rotary table, a clamp base used for containing a product is fixedly connected to the upper portion of the tool frame, and a clamp locked with a blind hole of the product is arranged on the clamp base. The four-axis rotary table is adopted to control the tool frame to rotate, under the action of a program of a numerical control machining center, the four-axis rotary table can rotate by + / -degree in the axis of an aviation product, the radian machining requirement of the product is met, the characteristics of holes, grooves and the like on an arc section are machined, the tool can effectively guarantee machining precision, and the machining efficiency is improved. Compared with a three-axis machine tool and a four-axis machining scheme, the clamping frequency is reduced, compared with a five-axis machining scheme and a four-axis machining scheme, the four-axis machining scheme has excellent economic applicability, meanwhile, the precision is not affected by the machine tool, and the four-axis machining scheme can obtain a stable post-process machining state.

Description

Technical Field

[0001] This utility model relates to the field of fixture and tooling technology, and in particular to a four-axis machining fixture for aerospace products. Background Technology

[0002] In the manufacturing of aerospace products, parts are increasingly designed to be thinner, larger, and more irregularly shaped to achieve weight reduction and easier assembly. These designs require high-precision machining to ensure performance standards are met. Traditional machining methods, such as multiple clamping operations, are prone to introducing machining errors, reducing production efficiency, and affecting the surface quality of the parts.

[0003] To address these issues, multi-axis machining solutions are widely used in the manufacturing of aerospace products. This approach effectively reduces the risks and errors associated with multiple clamping operations, improving production efficiency and surface finish. Multi-axis machining is particularly important when machining aerospace parts with complex geometries.

[0004] With reference to the attached diagram in the instruction manual Figure 3 Taking the cross-section of a large aerospace product as an example, its features include an arc shape, a blind hole passing through the axis, and a weight-reducing groove on the sidewall parallel to the axis. The machining of these features, especially the machining of the blind hole at a 5° angle, can only be achieved using a multi-axis machine tool.

[0005] In multi-axis machining solutions, five-axis machining centers are favored for their ability to machine complex angles and shapes. However, the main drawback of five-axis machining is its high cost, which makes it less economical. Therefore, to further optimize its applicability to the machining of aerospace products, we propose a four-axis machining fixture for aerospace products. Utility Model Content

[0006] The purpose of this invention is to address the main drawback of existing five-axis machining solutions, namely their high cost, which leads to their economic shortcomings, and to propose a four-axis machining fixture for aerospace products.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] Design a four-axis machining fixture for aerospace products, including:

[0009] Four-axis rotary table and tooling fixture;

[0010] The tooling frame is detachably connected to the output end of the four-axis rotary table. A fixture base for placing products is fixedly connected above the tooling frame. The fixture base has a clamp that locks with the blind hole of the product.

[0011] The tooling frame includes a left side plate and a right side plate located on both sides of the four-axis rotary table, and a top plate is fixedly connected between the top of the left side plate and the top of the right side plate.

[0012] Furthermore, a front positioning shaft is fixedly installed on the output end of the four-axis rotary table, and the front positioning shaft is detachably connected to the left side plate.

[0013] Furthermore, the front positioning shaft includes a circular base and a boss located in the circular base, and the circular base is fixedly connected to the output end of the four-axis turntable.

[0014] The left side plate has a positioning hole on its end face, and the boss is inserted into the positioning hole.

[0015] Furthermore, a rear positioning shaft is rotatably connected to the back end hole of the four-axis rotary table, and the rear positioning shaft is detachably connected to the right side plate.

[0016] Furthermore, the rear positioning shaft includes a connecting portion and a shaft diameter portion, the shaft diameter portion being rotatably connected to the back end hole of the four-axis turntable, and the connecting portion being connected to the right side plate.

[0017] Furthermore, a screw that passes through the front positioning shaft is provided on the end face of the left side plate, and the screw is threadedly connected to the shaft diameter portion.

[0018] Furthermore, the clamp is an air-expanding chuck, and the clamping end of the air-expanding chuck is inserted into the blind hole of the product.

[0019] The present invention proposes a four-axis machining fixture for aerospace products, which has the following advantages: This invention uses a four-axis rotary table to control the rotation of the fixture. Under the control of the CNC machining center program, the aerospace product can be rotated ± degrees by the four-axis rotary table to meet the product's arc machining requirements, thereby machining features such as holes and grooves on the arc cross-section. This fixture effectively ensures machining accuracy. Compared to three-axis machine tools, the four-axis machining solution saves on clamping times. Compared to five-axis machining, the four-axis machining solution has excellent economic applicability, and its accuracy is not affected by the machine tool. This four-axis machining solution can achieve a stable subsequent processing state, improving the reliability of the production process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the product structure of this utility model.

[0023] In the diagram: 1. Four-axis rotary table; 11. Front positioning axis; 111. Round base; 112. Boss; 12. Rear positioning axis; 121. Connecting part; 122. Shaft diameter part; 2. Tooling frame; 21. Left side plate; 211. Positioning hole; 22. Right side plate; 23. Top plate; 24. Screw; 3. Product; 4. Fixture base. Detailed Implementation

[0024] 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.

[0025] Reference Figure 1-3 As an embodiment of this utility model, a four-axis machining fixture for aerospace products is disclosed. Specifically, the machining fixture includes a four-axis rotary table 1 and a fixture frame 2. The four-axis rotary table 1 is the fourth axis of a CNC machine tool and is linked with the X, Y, Z and other coordinate axes of the machine tool. The key component of this type of rotary table is a worm gear pair. The middle part of the worm gear can be set as a hollow structure and connected to a hollow output shaft. Its specific structure has been disclosed in the prior art and will not be described in detail here.

[0026] The tooling frame 2 is detachably connected to the output end of the four-axis rotary table 1. A fixture base 4 for placing the product 3 is fixedly connected above the tooling frame 2. The fixture base 4 has a fixture that locks with the blind hole of the product 3.

[0027] The tooling frame 2 includes a left side plate 21 and a right side plate 22 located on both sides of the four-axis turntable 1. A top plate 23 is fixedly connected between the top of the left side plate 21 and the top of the right side plate 22. Specifically, in this embodiment, the left side plate 21, the right side plate 22 and the top plate 23 are all connected by fasteners such as bolts.

[0028] Of course, based on the above embodiments, the clamp base 4 described in this utility model can also be fixed to the top plate 23 by fasteners such as bolts.

[0029] In some embodiments, a front positioning shaft 11 is fixedly installed on the output end of the four-axis turntable 1 in this invention, and the front positioning shaft 11 is detachably connected to the left side plate 21.

[0030] Based on the above embodiments, the front positioning shaft 11 in this embodiment includes a circular base 111 and a boss 112 located in the circular base 111. The circular base 111 is fixedly connected to the output end of the four-axis turntable 1.

[0031] The left side plate 21 has a positioning hole 211 on its end face, and the boss 112 is inserted into the positioning hole 211.

[0032] Specifically, in this embodiment, the left side plate 21 is positioned by inserting the positioning hole 211 into the boss 112.

[0033] Of course, in this embodiment, a rear positioning shaft 12 is also rotatably connected in the back end hole of the four-axis turntable 1, and the rear positioning shaft 12 is detachably connected to the right side plate 22.

[0034] In a preferred embodiment, the rear positioning shaft 12 of the present invention includes a connecting portion 121 and a shaft diameter portion 122. The shaft diameter portion 122 is rotatably connected to the back end hole of the four-axis turntable 1. The connecting portion 121 is connected to the right side plate 22. Specifically, in this embodiment, the connecting portion 121 and the right side plate 22 are connected by fasteners such as bolts.

[0035] The shaft diameter portion 122 is configured as a circular boss structure. In this embodiment, the output shaft of the four-axis turntable 1 is a hollow structure. Therefore, by inserting the shaft diameter portion 122 into the hollow structure, the concentricity of the installation of the left side plate 21 and the right side plate 22 can be ensured, thus ensuring the stability of the rotation.

[0036] Of course, considering the locking between the left side plate 21 and the right side plate 22, in this embodiment, a screw 24 is provided on the end face of the left side plate 21, which passes through the front positioning shaft 11. The screw 24 is threadedly connected to the shaft diameter portion 122. Specifically, in this embodiment, three screws 24 are provided. The three screws 24 pass through the left side plate 21 and the front positioning shaft 11 in sequence and are finally threadedly connected to the shaft diameter portion 122. Since the right side plate 22 is fixedly connected to the connecting portion 121, the installation of the left side plate 21 and the right side plate 22 can be completed after the screws 24 are connected. Finally, the top plate 23 is installed to complete the assembly of the entire tooling frame 2.

[0037] It should be noted that the clamp described in this embodiment is an air-expanding chuck, and the clamping end of the air-expanding chuck is inserted into the blind hole of the product 3. The air-expanding chuck is a prior art technology, which uses gas as a driving medium to generate deformation to tighten the blind hole and achieve a fixing effect, thus ensuring the stability of the product 3 during processing.

[0038] In summary, this utility model utilizes a four-axis rotary table 1 to control the rotation of the tooling fixture 2. Under the control of the CNC machining center program, the aerospace product 3 can be rotated ±8 degrees around its axis by the four-axis rotary table 1, meeting the arc machining requirements of the product 3. This allows for the machining of features such as holes and grooves on the arc cross-section. Furthermore, the four-axis rotary table 1 has a simple structure and, given the current machining accuracy requirements, offers advantages such as convenient assembly and high stability. It effectively overcomes the limitations of three-axis vertical machine tool machining and the high cost of five-axis machining, while also improving production efficiency. The use of the tooling fixture 2 maximizes the reliability of the machining process and the stability of the aerospace product machining quality.

[0039] 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 four-axis machining fixture for aerospace products, characterized in that, include: A four-axis rotary table (1) and a tooling fixture (2); The tooling frame (2) is detachably connected to the output end of the four-axis rotary table (1). A fixture base (4) for placing the product (3) is fixedly connected above the tooling frame (2). The fixture base (4) has a fixture that locks to the blind hole of the product (3). The tooling frame (2) includes a left side plate (21) and a right side plate (22) located on both sides of the four-axis turntable (1), and a top plate (23) is fixedly connected between the top of the left side plate (21) and the top of the right side plate (22).

2. The four-axis machining fixture for aerospace products according to claim 1, characterized in that: A front positioning shaft (11) is fixedly installed on the output end of the four-axis turntable (1), and the front positioning shaft (11) is detachably connected to the left side plate (21).

3. The four-axis machining fixture for aerospace products according to claim 2, characterized in that: The front positioning shaft (11) includes a circular base (111) and a boss (112) located in the circular base (111). The circular base (111) is fixedly connected to the output end of the four-axis turntable (1). The left side plate (21) has a positioning hole (211) on its end face, and the boss (112) is inserted into the positioning hole (211).

4. The four-axis machining fixture for aerospace products according to claim 2, characterized in that: A rear positioning shaft (12) is rotatably connected in the back end hole of the four-axis turntable (1), and the rear positioning shaft (12) is detachably connected to the right side plate (22).

5. The four-axis machining fixture for aerospace products according to claim 4, characterized in that: The rear positioning shaft (12) includes a connecting part (121) and a shaft diameter part (122). The shaft diameter part (122) is rotatably connected to the back end hole of the four-axis turntable (1). The connecting part (121) is connected to the right side plate (22).

6. The four-axis machining fixture for aerospace products according to claim 5, characterized in that: A screw (24) that passes through the front positioning shaft (11) is provided on the end face of the left side plate (21), and the screw (24) is threadedly connected to the shaft diameter portion (122).

7. A four-axis machining fixture for an aerospace product according to any one of claims 1-6, characterized in that: The clamp is an air-expanding chuck, and the clamping end of the air-expanding chuck is inserted into the blind hole of the product (3).

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