A precision deep hole machining tool and machining method for a titanium alloy assembly

Abstract

The application discloses a precision deep hole machining tool and machining method for a titanium alloy assembly, and belongs to the technical field of aerospace part machining.The application solves the problems of unreliable limiting, clamping string movement of precision deep hole machining of the titanium alloy assembly and poor batch consistency of the deep hole diameter, and the rudder surface positioning bottom plate is arranged on the bottom plate, the long-side limiting baffle is arranged on the rudder surface positioning bottom plate, the inclined surface limiting fixing block is arranged on the rudder surface positioning bottom plate, the inclined edge extrusion wedge block is arranged on the rudder surface positioning bottom plate, the inclined edge extrusion wedge block is connected with the inclined edge baffle block, the rudder surface rear edge supporting block is arranged on the rudder surface positioning bottom plate, the rudder surface fastening pressing plate is arranged on the rudder surface positioning bottom plate, the rudder shaft adjusting nut is further arranged on the rudder surface positioning bottom plate, and the rudder shaft is installed on the rudder surface positioning bottom plate through the rudder shaft adjusting nut.The machining tool is stable in limiting of the rudder surface and the rudder shaft, convenient to disassemble and assemble, and good in stability during machining.

Description

Technical Field

[0001] This invention belongs to the field of aerospace parts processing technology, specifically a precision deep hole machining tooling and processing method for titanium alloy components. Background Technology

[0002] In aerospace products, there is a high demand for deep hole machining of titanium alloy components. These deep holes are used in conjunction with precision shafts to realize the product's functionality. Due to the large batch size and high usage of these products, the stability of the deep hole machining quality is particularly important. The main forming indicators of the product include the reliability of tooling positioning, the stability of deep hole diameter, and the stability of deep hole surface quality.

[0003] The existing machining method for a certain titanium alloy composite rudder surface product uses a modular clamping and positioning method, which requires a high degree of uniformity in the relative position of the workpieces after positioning. If the relative position of the workpieces deviates significantly, a reaming process is required for correction, resulting in high machining costs and low efficiency. Furthermore, titanium alloys have low thermal conductivity, high strength, and strong springback and hardening properties. When using a gun drill to complete deep hole machining of titanium alloys in one pass, the small contact area between the gun drill and the chips leads to a large stress response, causing tool wear and tool sticking. This directly results in poor surface quality of the deep hole, making it unsuitable for direct use in the assembly of precision shafts.

[0004] Currently, deep hole machining of this product uses a simple clamping method with a large inclined plane support and random clamping of pressure plates. While the limiting method is simple, the workpiece suffers severe deformation due to weld beads, leading to occasional movement and vibration during machining. This results in axial misalignment and unstable hole diameter, requiring manual secondary reaming. Consequently, the production efficiency of deep hole machining is low, and the processing cost is high. Furthermore, deep hole machining of titanium alloy components uses a one-time forming process with an alloy-tipped welding gun drill. However, due to the influence of the workpiece's titanium alloy material condition (cutting performance, internal defects), drill bit regrinding condition, and drilling system condition, the batch hole diameter and surface quality stability are poor. This makes it difficult to meet the requirements of a deep hole surface finish of 1.6, a hole diameter tolerance of 0.015-0.021, and a deep hole assembly clearance of <0.035 mm. The product has poor interchangeability and is unsuitable for mass production.

[0005] Therefore, this application proposes a tooling that can reliably limit the movement of titanium alloy wing and rudder assemblies, in order to solve the problems of clamping movement and poor batch consistency of deep hole diameter in the precision deep hole machining of such titanium alloy components. Summary of the Invention

[0006] The purpose of this invention is to solve the problems of unreliable positioning in the current processing of titanium alloy components, which leads to clamping misalignment and poor batch consistency of deep hole diameters in precision deep hole machining of titanium alloy components. A brief overview of the invention is provided below to offer a basic understanding of certain aspects of it. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0007] The technical solution of this invention:

[0008] Option 1: A precision deep hole machining fixture for titanium alloy components, comprising a rudder surface positioning base plate, a base plate, a long side limiting baffle, a pressure plate support block, a rudder surface fastening pressure plate, a rudder shaft adjusting nut, a rudder surface inclined extrusion pad, an inclined surface limiting fixing block, an inclined side block, an inclined side extrusion wedge, and a rudder surface trailing edge support block. The rudder surface positioning base plate is mounted on the base plate and has a mounting groove for placing the rudder surface. A long side limiting baffle is provided on the rudder surface positioning base plate, contacting the long side of the rudder surface. An inclined surface limiting fixing block is provided on the rudder surface positioning base plate, and a lateral screw is installed on the inclined surface limiting fixing block. The rudder surface is equipped with a rudder surface bevel compression pad at the end of the rudder surface screw. The end of the rudder surface bevel compression pad contacts the bevel of the rudder surface. The rudder surface positioning base plate is equipped with a bevel compression wedge block, which is connected to a bevel stop block and contacts the bevel of the rudder surface. The rudder surface positioning base plate is equipped with a rudder surface trailing edge support block, which contacts the trailing edge of the rudder surface. The rudder surface positioning base plate is equipped with multiple rudder surface fastening pressure plates, which are mounted on the base plate through pressure plate support blocks. The rudder surface positioning base plate is also equipped with a rudder shaft adjusting nut, which is mounted on the rudder surface positioning base plate through the rudder shaft adjusting nut.

[0009] Furthermore, the rudder surface positioning base plate is connected to the base plate by multiple positioning pins, and the rudder surface positioning base plate is fixed to the base plate by multiple long bolts and short bolts.

[0010] Furthermore, multiple first bolts are evenly distributed on the long side limiting baffle.

[0011] Furthermore, the rudder surface fastening plate is connected to the bottom plate by a second bolt.

[0012] Furthermore, the inclined plane limiting and fixing block is connected to the rudder surface positioning base plate by a third bolt.

[0013] Furthermore, the inclined extrusion wedge is connected to the rudder surface positioning base plate by a fourth bolt.

[0014] Furthermore, a rudder surface trailing edge stop is provided on the rudder surface trailing edge support block, and the rudder surface trailing edge stop is connected to the rudder surface trailing edge support block by a fifth bolt.

[0015] Option 2: A machining method based on the precision deep hole machining fixture for titanium alloy components described in Option 1, comprising the following steps:

[0016] Preparation: Install the long side limit baffle, the inclined side stop block, the inclined side extrusion wedge block, and the rudder surface trailing edge support block on the rudder surface positioning base plate, and install the rudder shaft adjusting nut on the base plate.

[0017] Fixing the workpiece: Connect the tooling to the machine tool via a base plate using threads. Place the rudder surface on the rudder surface positioning base plate, ensuring complete contact between the rudder surface and the effective support surface of the rudder surface positioning base plate. Install the rudder surface trailing edge support block and the rudder surface trailing edge stop block, and circumferentially compress and tighten the rudder surface. Use the rudder surface inclined surface compression pad and inclined surface limiting fixing block to compress and tighten the inclined surface of the rudder surface. Insert the rudder shaft into the tenon groove of the rudder surface. Use the rudder shaft adjusting nut to support and fine-tune the rudder shaft, ensuring that the contact gap between the rudder shaft and the rudder surface positioning base plate is less than 0.03mm, and the contact gap between the rudder shaft and the rudder surface tenon groove is less than 0.03mm. Finally, use the pressure plate support block and the rudder surface fastening pressure plate to tighten and limit the rudder surface and the rudder shaft respectively, achieving accurate positioning of the rudder surface and the rudder shaft. Then, perform deep hole drilling on the rudder surface.

[0018] Dismantling work: After completing the deep hole drilling of the rudder surface, first remove the rudder surface fastening pressure plate and pressure plate support block, then tighten the rudder shaft adjusting nut to remove the rudder shaft, then remove the rudder surface inclined extrusion pad and inclined limit fixing block, and finally remove the rudder surface trailing edge support block and rudder surface trailing edge stop block, and remove the rudder surface from the rudder surface positioning base plate.

[0019] The present invention has the following beneficial effects:

[0020] 1. The precision deep hole machining fixture for titanium alloy components of the present invention solves the problem of unstable accurate positioning of the rudder surface and rudder shaft during deep hole machining of wing-rudder assemblies, which leads to clamping deformation, resulting in skewness of the deep hole axis and instability of the hole diameter.

[0021] 2. The precision deep hole machining fixture for titanium alloy components of the present invention has a simple structure. The components are generally connected by screws or bolts, which makes disassembly and assembly convenient. It has good stability during machining and is suitable for continuous batch production. The fixture itself is reasonably and practically designed, has low manufacturing cost, and its structural principle can be replicated, making it highly scalable.

[0022] 3. The precision deep hole machining fixture for titanium alloy components of the present invention uses a rudder shaft adjusting nut to fine-tune and support the assembly position of rudder shaft-type workpieces, ensuring the accuracy and stability of the relative position between the rudder surface and the rudder shaft during the machining process, and realizing stable control of the non-deep space position assembly relationship of deep hole assemblies. Attached Figure Description

[0023] Figure 1This is a top view of a precision deep-hole machining fixture for titanium alloy components;

[0024] Figure 2 yes Figure 1 AA section view;

[0025] Figure 3 yes Figure 1 BB cross-sectional view;

[0026] Figure 4 yes Figure 1 CC section view;

[0027] Figure 5 yes Figure 1 DD sectional view.

[0028] In the diagram, 1-long bolt, 3-rudder surface positioning base plate, 4-bottom plate, 5-short bolt, 6-long side limiting baffle, 7-first bolt, 9-pressure plate support block, 10-rudder surface fastening pressure plate, 12-second bolt, 13-positioning pin, 14-rudder shaft adjusting nut, 16-rudder surface inclined extrusion pad, 17-inclined surface limiting fixing block, 18-lateral screw, 19-third bolt, 20-inclined side stop block, 21-inclined side extrusion wedge block, 22-fourth bolt, 24-rudder surface trailing edge support block, 25-rudder surface trailing edge stop block, 26-fifth bolt. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0030] The connections mentioned in this invention are divided into fixed connections and detachable connections. Fixed connections (i.e., non-detachable connections) include, but are not limited to, conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include, but are not limited to, conventional disassembly methods such as threaded connections, snap-fit ​​connections, pin connections, and hinged connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can always be found to achieve the function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for fixed connections, and a hinged connection can be chosen for detachable connections.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] Example 1, combined with Figures 1-5 This embodiment describes a precision deep hole machining fixture for a titanium alloy component, comprising a rudder surface positioning base plate 3, a base plate 4, a long side limiting baffle 6, a pressure plate support block 9, a rudder surface fastening pressure plate 10, a rudder shaft adjusting nut 14, a rudder surface inclined extrusion pad 16, an inclined surface limiting fixing block 17, an inclined side block 20, an inclined side extrusion wedge 21, and a rudder surface trailing edge support block 24.

[0033] The base plate 4 is used to connect with the machine tool. The rudder surface positioning base plate 3 is installed on the base plate 4 and positioned by multiple positioning pins 13. Then, the rudder surface positioning base plate 3 is fixed on the base plate 4 by multiple long bolts 1 and short bolts 5. The rudder surface positioning base plate 3 is machined with a full contour groove of the rudder surface and a weld bead avoidance groove of the rudder surface. The weld bead avoidance groove of the rudder surface effectively avoids the weld bead on the rudder surface, reduces the contact area between the rudder surface and the tooling, and reduces clamping deformation.

[0034] Before placing the rudder surface on the rudder surface positioning base plate 3, first install the long side limiting baffle 6 on the rudder surface positioning base plate 3 with screws. Multiple first bolts 7 are evenly distributed on the long side limiting baffle 6. Then, install the inclined block baffle 20 and the inclined side extrusion wedge 21 on the rudder surface positioning base plate 3. The inclined side extrusion wedge 21 is connected to the rudder surface positioning base plate 3 by the fourth bolt 22. The inclined side baffle 20 is connected to the rudder surface positioning base plate 3 by screws. Then, install the rudder surface trailing edge support block 24 on the rudder surface positioning base plate 3. Place a 1mm thick rubber pad in the weld clearance groove on the rudder surface positioning base plate 3. The rubber pad provides flexible support and shock absorption for the rudder surface. Finally, install the rudder surface adjusting nut 14 on the base plate 4. The rudder surface trailing edge baffle 25 is not installed yet.

[0035] In use, the tooling is mounted on the machine tool via the base plate 4. The rudder surface is placed into the full-contour groove of the rudder surface positioning base plate 3. When the rudder surface is fully in contact with the effective support surface of the rudder surface positioning base plate 3, the rudder surface trailing edge support block 24 and the rudder surface trailing edge stop block 25 are installed and locked with the fifth bolt 26 to circumferentially compress and secure the rudder surface. The inclined surface limiting fixing block 17 is connected to the rudder surface positioning base plate 3 via the third bolt 19. The rudder surface inclined surface compression pad 16 is installed on the inclined surface limiting fixing block 17 via the side screw 18. The side screw 18 drives the rudder surface inclined surface compression pad 16 to compress and secure the inclined surface of the rudder surface. The rudder shaft is installed in the tenon groove of the rudder surface, and the rudder shaft adjusting nut 14 is used to support and fine-tune the rudder shaft. Ensure that the fit gap between the rudder shaft and the rudder surface positioning base plate 3 is less than 0.03mm, and the fit gap between the rudder shaft and the rudder surface tenon groove is less than 0.03mm. Finally, use the rudder surface fastening plate 10 to fasten and limit the rudder surface and rudder shaft. The rudder surface fastening plate 10 is installed on the base plate 4 through the pressure plate support block 9. The rudder surface fastening plate 10 is connected to the base plate 4 through the second bolt 12. By tightening the second bolt 12, the rudder surface fastening plate 10 is controlled to fasten and limit the rudder surface and rudder shaft. At this time, the tooling achieves accurate positioning of the rudder surface and rudder shaft, avoiding the problem of deep hole axis misalignment and hole diameter instability caused by workpiece processing movement. It also achieves effective avoidance of rudder surface weld beads, reduces clamping deformation, and further ensures the stability of deep hole diameter forming.

[0036] The material of the rudder surface is titanium alloy TA15. The tooling scheme for deep hole machining of the product assembly is as follows: a non-standard ordinary welded integral alloy gun is used as the bottom hole machining tool, and a customized guide bar indexable insert gun drill is used as the final forming tool. During the machining process, a special high-precision deep hole guide sleeve is used to complete the deep hole machining. A 0.4mm allowance is left in the bottom hole to compensate for the dimensional requirements of the annular grooves on the hole wall generated when machining the titanium alloy bottom hole with an ordinary alloy gun drill. The secondary machining with the guide bar indexable insert gun drill solves the problems of high cutting resistance of the drilling system, poor heat dissipation, and chip retention caused by the removal of a large amount of metal material. It improves the cutting state, achieves stable and uniform material removal, ensures the quality stability of the deep hole diameter and surface roughness, and realizes the mass production of deep hole assembly direct parts.

[0037] The method of using the non-standard cutting tool of this invention: Deep hole machining is performed using a vertical / horizontal convertible five-axis boring and milling machining center (spindle cooling system, HSK-A63 tool holder) or a deep hole drilling machine. The machining process is as follows:

[0038] Deep Hole 1: ① Drill the deepest hole Φ30, with a bottom hole Φ29.4 and a depth of 80 → ② Fine boring to 80m deep → ③ Drill a Φ18 deep hole with a Φ17.4m guide hole and a depth of 35m → ④ Precision bore a Φ18 deep hole with a guide hole to... 30mm depth → ⑤ Drill a 17.6mm diameter hole with an alloy gun drill, 191mm depth → ⑥ Precision bore the guide hole to... 30 deep → ⑦ Drill a deep hole Φ18 with a machine-clamped blade gun drill → ⑧ Drill a hole Φ13.6 with a guide alloy gun drill after lowering the drill sleeve → ⑨ Drill a hole Φ14 with a machine-clamped blade gun drill after lowering the drill sleeve;

[0039] Deep Hole 2: ① Drill the deepest hole Φ15 and the pilot hole Φ14.4 to a depth of 35 → ② Fine boring to 30mm depth → ③ Drill a Φ14.6mm deep hole using an alloy gun drill → ④ Precision bore a Φ15mm deep guide hole to... 30 deep → ⑤ Use a mechanically clamped insert gun drill to drill a deep hole Φ15 deep 221 → ⑥ After lowering the drill sleeve, guide the alloy gun drill to drill a deep hole Φ8 deep 327;

[0040] In this invention, the deep hole machining of the titanium alloy assembly is completed by a single machine tool operation, which can further ensure the stability of the deep hole diameter. All machining processes use mm as the unit to ensure the surface roughness of the deep hole Ra1.6, making the batch parts interchangeable, avoiding the need for matching with deep hole assembly parts, having good batch production applicability, facilitating production planning, reducing production costs, and improving production efficiency.

[0041] After the deep hole machining of the titanium alloy assembly is completed, first remove the rudder surface fastening pressure plate 10 and pressure plate support block 9, loosen the rudder shaft adjusting nut 14, and take out the rudder shaft. Then remove the rudder surface inclined extrusion pad 16 and inclined limit fixing block 17. Finally, remove the rudder surface trailing edge support block 24 and rudder surface trailing edge stop block 25, and take out the rudder surface.

[0042] Example 2, combined with Figure 1 This embodiment describes a machining method for a precision deep hole machining fixture for a titanium alloy component, comprising the following steps:

[0043] Preparation: Install the long side limit baffle 6, the inclined side block 20, the inclined side extrusion wedge 21, and the rudder surface trailing edge support block 24 on the rudder surface positioning base plate 3, and install the rudder shaft adjusting nut 14 on the base plate 4.

[0044] Fixing the workpiece: The tooling is threaded to the machine tool via the base plate 4. The rudder surface is placed on the rudder surface positioning base plate 3, so that the effective support surface of the rudder surface and the rudder surface positioning base plate 3 are completely in contact. The rudder surface trailing edge support block 24 and the rudder surface trailing edge stop block 25 are installed to circumferentially compress and tighten the rudder surface. The rudder surface inclined surface compression pad 16 and the inclined surface limiting fixing block 17 are used to compress and tighten the inclined surface of the rudder surface. The rudder shaft is installed in the tenon groove of the rudder surface. The rudder shaft adjusting nut 14 is used to support and fine-tune the rudder shaft to ensure that the contact gap between the rudder shaft and the rudder surface positioning base plate 3 is less than 0.03mm and the contact gap between the rudder shaft and the rudder surface tenon groove is less than 0.03mm. Finally, the pressure plate support block 9 and the rudder surface fastening pressure plate 10 are used to fasten and limit the rudder surface and the rudder shaft respectively to achieve accurate positioning of the rudder surface and the rudder shaft. Then, the rudder surface is drilled for deep hole work.

[0045] Dismantling work: After completing the drilling and deep hole machining of the rudder surface, first remove the rudder surface fastening pressure plate 10 and pressure plate support block 9, then tighten the rudder shaft adjusting nut 14 to remove the rudder shaft, then remove the rudder surface inclined extrusion pad 16 and inclined limit fixing block 17, and finally remove the rudder surface trailing edge support block 24 and rudder surface trailing edge stop block 25, and remove the rudder surface from the rudder surface positioning base plate 3.

[0046] This embodiment is merely an exemplary illustration of this patent and does not limit its scope of protection. Those skilled in the art can make partial changes to it, as long as they do not exceed the spirit and essence of this patent, they are all within the scope of protection of this patent.

Claims

1. A precision deep hole machining fixture for titanium alloy components, characterized in that: The system includes a rudder surface positioning base plate (3), a base plate (4), a long side limiting baffle (6), a pressure plate support block (9), a rudder surface fastening pressure plate (10), a rudder shaft adjusting nut (14), a rudder surface inclined extrusion pad (16), an inclined surface limiting fixing block (17), an inclined side stop block (20), an inclined side extrusion wedge block (21), and a rudder surface trailing edge support block (24). The rudder surface positioning base plate (3) is mounted on the base plate (4). The rudder surface positioning base plate (3) has a mounting groove for placing the rudder surface. The long side limiting baffle (6) is mounted on the rudder surface positioning base plate (3) and contacts the long side of the rudder surface. The inclined surface limiting fixing block (17) is mounted on the rudder surface positioning base plate (3) and is fitted with a lateral screw (18). The end of the rudder is provided with a rudder surface inclined extrusion pad (16), the end of the rudder surface inclined extrusion pad (16) is in contact with the inclined surface of the rudder surface, the rudder surface positioning base plate (3) is provided with an inclined edge extrusion wedge (21), the inclined edge extrusion wedge (21) is connected with an inclined edge stop (20), the inclined edge stop (20) is in contact with the inclined edge of the rudder surface, the rudder surface positioning base plate (3) is provided with a rudder surface rear edge support block (24), the rudder surface rear edge support block (24) is in contact with the rear edge of the rudder surface, the rudder surface positioning base plate (3) is provided with multiple rudder surface fastening pressure plates (10), the rudder surface fastening pressure plates (10) are installed on the bottom plate (4) through the pressure plate support block (9), the rudder surface positioning base plate (3) is also provided with a rudder shaft adjusting nut (14), the rudder shaft is installed on the rudder surface positioning base plate (3) through the rudder shaft adjusting nut (14).

2. The precision deep hole machining fixture for a titanium alloy component according to claim 1, characterized in that: The rudder positioning base plate (3) is connected to the base plate (4) by multiple positioning pins (13), and the rudder positioning base plate (3) is fixed to the base plate (4) by multiple long bolts (1) and short bolts (5).

3. The precision deep hole machining fixture for titanium alloy components according to claim 2, characterized in that: Multiple first bolts (7) are evenly distributed on the long side limiting baffle (6).

4. The precision deep hole machining fixture for a titanium alloy component according to claim 3, characterized in that: The rudder fastening plate (10) is connected to the bottom plate (4) by the second bolt (12).

5. The precision deep hole machining fixture for a titanium alloy component according to claim 4, characterized in that: The inclined plane limiting fixing block (17) is connected to the rudder surface positioning base plate (3) by the third bolt (19).

6. The precision deep hole machining fixture for a titanium alloy component according to claim 5, characterized in that: The inclined extrusion wedge (21) is connected to the rudder positioning base plate (3) by the fourth bolt (22).

7. The precision deep hole machining fixture for a titanium alloy component according to claim 6, characterized in that: The rudder trailing edge support block (24) is provided with a rudder trailing edge stop block (25), which is connected to the rudder trailing edge support block (24) by a fifth bolt (26).

8. The machining method of the precision deep hole machining fixture for titanium alloy components as described in claim 7, characterized in that, Includes the following steps: Preparation: Install the long side limiting baffle (6), the inclined side block (20), the inclined side extrusion wedge (21), and the rudder surface trailing edge support block (24) on the rudder surface positioning base plate (3), and install the rudder shaft adjusting nut (14) on the base plate (4); Fixed work: The tooling is threaded to the machine tool through the bottom plate (4), the rudder surface is placed on the rudder surface positioning base plate (3) so that the rudder surface and the effective support surface of the rudder surface positioning base plate (3) are completely in contact. The rudder surface rear edge support block (24) and the rudder surface rear edge stop block (25) are installed to circumferentially press and tighten the rudder surface. The rudder surface inclined surface pressing pad (16) and inclined surface limiting fixing block (17) are used to press and tighten the inclined surface of the rudder surface. The rudder shaft is installed in the tenon groove of the rudder surface. The rudder shaft is supported and finely adjusted by the rudder shaft adjusting nut (14) to ensure that the contact gap between the rudder shaft and the rudder surface positioning base plate (3) is less than 0.03mm and the contact gap between the rudder shaft and the rudder surface tenon groove is less than 0.03mm. Finally, the pressure plate support block (9) and the rudder surface fastening pressure plate (10) are used to fasten and limit the rudder surface and the rudder shaft respectively to achieve accurate positioning of the rudder surface and the rudder shaft. Then, the rudder surface is drilled for deep hole work. Dismantling work: After completing the drilling and deep hole machining of the rudder surface, first remove the rudder surface fastening pressure plate (10) and pressure plate support block (9), then tighten the rudder shaft adjusting nut (14) to take out the rudder shaft, then remove the rudder surface inclined extrusion pad (16) and inclined limit fixing block (17), and finally remove the rudder surface trailing edge support block (24) and rudder surface trailing edge stop block (25) to take the rudder surface out of the rudder surface positioning base plate (3).

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