A vertical boring tool for deep hole thin-wall cylinder segment

Abstract

The application provides a vertical boring tool for deep-hole thin-wall cylinder segments, which comprises an axial compression ring assembly; the top of the axial compression ring assembly is coaxially connected with a fixed upper positioning disc; the axial compression ring assembly is circumferentially covered with a cylinder segment; the cylinder segment is circumferentially provided with a wood mold assembly, and a cavity is formed between the cylinder segment and the wood mold assembly; the cavity is filled with filling gypsum; and the wood mold assembly is externally pulled and fixed to a bottom plate at the bottom end of the wood mold assembly through inclined support columns. The application can effectively avoid deformation of thin-wall parts in machining due to clamping, effectively solve the core problems of rigid support and prevention of clamping deformation, effectively avoid equipment limitations, and is easy to reuse, economical, and good in structure, implementation effect, saving of a large amount of manpower and material resources, reduction of trial production cost, and application and promotion value.

Description

Technical Field

[0001] This invention relates to a vertical boring tool for deep-hole thin-walled cylindrical sections, belonging to the category of... Background Technology

[0002] Thin-walled parts are widely used in various fields due to their lightweight and small footprint. For example, in the aerospace industry, thin-walled parts are used to manufacture aircraft and rocket structural components to reduce overall weight and improve efficiency. In engineering practice, thin-walled parts typically refer to parts with a diameter-to-wall-thickness ratio greater than 15. These parts have poor rigidity, are easily deformed, and are sensitive to cutting heat. Therefore, appropriate clamping and support measures should be taken during machining to reduce deformation and ensure controlled product precision.

[0003] The following example, using a thin-walled aluminum alloy deep-hole workpiece in production practice, illustrates the application of vertical boring tools for large-scale thin-walled cylindrical sections.

[0004] The structural characteristics of this aluminum alloy thin-walled workpiece are as follows: inner diameter of the cylindrical section (mm), inner cylindricity of the inner hole (0.2mm); total length (1844mm); wall thickness (9.5mm); diameter-to-thickness ratio > 32, depth-to-diameter ratio > 6, classifying it as a typical deep-hole thin-walled part. This part has a rotating structure and can be formed and precision-compliant using turning. However, due to the boring depth of 1844mm (requiring a single, continuous boring operation), and the fact that the inner hole serves as the datum for external surface finishing, achieving precise inner hole machining is crucial to the success of the product manufacturing.

[0005] Due to the lack of ideal machining equipment in practice, such as extended horizontal CNC lathes equipped with deep hole boring bar and matching deep hole boring bar holder, deep hole machining is actually achieved by using a 5-meter CNC vertical lathe.

[0006] The design and manufacture of specialized tooling solved the core problems of rigid support and prevention of clamping deformation, thus enabling qualified product delivery. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides a vertical boring tool for deep hole thin-walled cylindrical sections. This vertical boring tool for deep hole thin-walled cylindrical sections can effectively solve the core problems of rigid support and prevention of clamping deformation, effectively avoid equipment limitations, and is easy to reuse and economical.

[0008] The present invention is achieved through the following technical solutions.

[0009] The present invention provides a vertical boring tool for a deep hole thin-walled cylindrical section, including an axial clamping ring assembly; the top of the axial clamping ring assembly is coaxially connected to and fixed to an upper positioning plate, the axial clamping ring assembly is circumferentially covered with a cylindrical section, a wooden mold assembly is circumferentially surrounded by the cylindrical section and a cavity is formed between the cylindrical section and the wooden mold assembly, the cavity is filled with filling plaster, and the wooden mold assembly is externally tightened and fixed to the bottom plate at the bottom end of the wooden mold assembly by inclined support columns.

[0010] A non-contact cavity is formed between the cylindrical section and the wooden mold assembly, allowing the plaster filling to be integrally formed and circumferentially sealed.

[0011] The wooden mold assembly is a longitudinally multi-segment structure coaxially joined into a cylindrical shape.

[0012] The top and bottom of the wooden mold assembly are tightened and fixed by a transverse tie rod assembly.

[0013] The cross-section of the wooden mold assembly is triangular, and the cross-section of the cylindrical section is circular. The center of the cylindrical section is located at the center point of the cross-section of the wooden mold assembly, and the fixing point of the inclined support column on the wooden mold assembly is located at the vertex of the triangle of the wooden mold assembly.

[0014] The wooden mold assembly passes through the transverse tie rod assembly at the apex of the triangle, and the inclined support column is fixed to the wooden mold assembly through the uppermost transverse tie rod assembly.

[0015] The base plate is disc-shaped, and the fixing points of the inclined support columns on the base plate are located at the edge of the base plate.

[0016] The top of the wooden mold assembly is fixed with an upper transition ring, and the outer diameter of the upper transition ring is the same as that of the upper positioning plate.

[0017] The bottom of the axial clamping ring assembly is directly opposite a lower positioning support assembly for placing thin-walled parts on the base plate.

[0018] The inner wall of the wooden mold assembly is fitted with a cylindrical column assembly.

[0019] The beneficial effects of this invention are as follows: it can effectively avoid deformation of thin-walled parts during processing due to clamping reasons, effectively solve the core problems of rigid support and prevention of clamping deformation, effectively avoid equipment limitations, and is easy to reuse. It is economical, realizes the rough and fine machining needs of large-size aluminum alloy cylinder sections on vertical lathes, has a simple structure, good implementation effect, saves a lot of manpower and material resources, reduces trial production costs, and has high application and promotion value. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of at least one embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Top view.

[0022] In the figure: 1-Axial clamping ring assembly, 2-Upper positioning plate, 3-Column assembly, 4-Upper transition ring, 5-Inclined support column, 6-Cylinder section, 7-Transverse tie rod assembly, 8-Wooden mold assembly, 9-Filling plaster, 10-Lower positioning support assembly, 11-Base plate. Detailed Implementation

[0023] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0024] Example 1

[0025] like Figure 1 , Figure 2 The vertical boring tool for a deep-hole thin-walled cylindrical section shown includes an axial clamping ring assembly 1; the top of the axial clamping ring assembly 1 is coaxially connected to and fixed to an upper positioning plate 2, the axial clamping ring assembly 1 is circumferentially covered with a cylindrical section 6, the cylindrical section 6 is circumferentially surrounded by a wooden mold assembly 8 and a cavity is formed between the cylindrical section 6 and the wooden mold assembly 8, the cavity is filled with filling plaster 9, and the wooden mold assembly 8 is externally tightened and fixed to the bottom plate 11 at the bottom end of the wooden mold assembly 8 by an inclined support column 5.

[0026] Example 2

[0027] Consistent with Example 1, but with further optimizations in details, a non-contact cavity is formed between the cylindrical section 6 and the wooden mold assembly 8, so that the filling plaster 9 is integrally formed and circumferentially closed.

[0028] Furthermore, the wooden mold component 8 is a longitudinally multi-segment structure coaxially connected into a cylindrical shape.

[0029] Furthermore, the top and bottom of the wooden mold assembly 8 are tightened and fixed by the transverse tie rod assembly 7.

[0030] Furthermore, the cross-section of the wooden mold component 8 is triangular, the cross-section of the cylindrical segment 6 is circular, the center of the cross-section of the cylindrical segment 6 is located at the center point of the cross-section of the wooden mold component 8, and the fixing point of the inclined support column 5 on the wooden mold component 8 is located at the vertex of the triangle of the wooden mold component 8.

[0031] Furthermore, the wooden mold assembly 8 passes through the transverse tie rod assembly 7 at the apex of the triangle, and the inclined support column 5 is fixed to the wooden mold assembly 8 through the uppermost transverse tie rod assembly 7.

[0032] Example 3

[0033] Consistent with Embodiment 1, but with further optimizations in details, the base plate 11 is disc-shaped, and the fixing point of the inclined support column 5 on the base plate 11 is located at the edge of the base plate 11.

[0034] Furthermore, an upper transition ring 4 is fixed to the top of the wooden mold assembly 8, and the outer diameter of the upper transition ring 4 is the same as that of the upper positioning plate 2.

[0035] Furthermore, directly below the bottom end of the axial clamping ring assembly 1, there is a lower positioning support assembly 10 on the base plate 11 for placing thin-walled parts.

[0036] Furthermore, a cylindrical column assembly 3 is tightly attached to the inner wall of the wooden mold assembly 8.

[0037] Example 4

[0038] In conjunction with the above embodiments, it is assembled on a 5-meter vertical lathe workbench;

[0039] The cylindrical section 6 is positioned, limited, and axially locked by the upper positioning plate 2, the lower positioning support assembly 10, the base plate 11, the column assembly 3, and the inclined support column 4;

[0040] After the tooling and parts are assembled as required, the outer circumference of the cylinder section 6 is covered with a plastic film to form an isolation and protective layer;

[0041] The tooling wooden mold assembly 8 is fixed layer by layer to the periphery of the column assembly 3 by the horizontal tie rod assembly 7, and a non-contact cavity is formed between the cylindrical section 6 and the wooden mold assembly 8.

[0042] The cavity is filled with plaster 9 layer by layer; after the plaster 9 has partially solidified, the plaster 9 is poured upwards layer by layer, so that the cylinder section 6, the plaster 9, and the column assembly 3 form a fully covered radial support.

[0043] This ultimately achieves axial compression and radial full-coverage rigid support without localized stress, meeting normal processing requirements.

Claims

1. A vertical boring tool for boring a deep hole thin-wall cylinder segment, comprising an axial compression ring assembly (1), characterized in that: The axial compression ring assembly (1) is coaxially connected and fixed at the top of the upper positioning disc (2), the axial compression ring assembly (1) is circumferentially covered by a cylinder segment (6), the cylinder segment (6) circumferentially has a wood mold assembly (8) and a cavity is formed between the cylinder segment (6) and the wood mold assembly (8), the cavity is filled with filling gypsum (9), and the wood mold assembly (8) is externally pulled and fixed to the bottom plate (11) at the bottom end of the wood mold assembly (8) through the inclined support column (5); a non-contact cavity is formed between the cylinder segment (6) and the wood mold assembly (8), so that the filling gypsum (9) is integrally formed and circumferentially closed; the wood mold assembly (8) is longitudinally segmented and coaxially butted to form a cylindrical shape; the cross section of the wood mold assembly (8) is triangular, the cross section of the cylinder segment (6) is circular, the center of the cross section of the cylinder segment (6) is located at the center point of the cross section of the wood mold assembly (8), and the fixing point of the inclined support column (5) on the wood mold assembly (8) is located at the triangular vertex of the wood mold assembly (8); the wood mold assembly (8) crosses the horizontal pull rod assembly (7) at the triangular vertex position, and the inclined support column (5) is fixed to the wood mold assembly (8) through the uppermost horizontal pull rod assembly (7); the bottom plate (11) is disc-shaped, and the fixing point of the inclined support column (5) on the bottom plate (11) is located at the edge of the bottom plate (11); the wood mold assembly (8) is fixed with an upper transition ring (4) at the top, the outer diameter of the upper transition ring (4) is consistent with that of the upper positioning disc (2); the axial compression ring assembly (1) is opposite to the lower positioning support assembly (10) for placing thin-walled parts below the bottom plate (11).

2. The vertical boring tooling for deep hole thin wall cylinder segment as claimed in claim 1, wherein: The top end and the bottom end of the wood mold assembly (8) are pulled and fixed by the horizontal pull rod assembly (7).

3. The vertical boring tooling for deep hole thin wall cylinder segment as claimed in claim 1 wherein: The inner wall of the wood mold assembly (8) is tightly provided with a cylindrical column assembly (3).

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