Vertical boring tool for deep-hole thin-wall cylinder section

Abstract

The invention provides a vertical boring tool for a deep-hole thin-wall cylinder section. The vertical boring tool comprises an axial pressing ring assembly. The top of the axial compression ring assembly is coaxially connected and fixed with the upper positioning disc, the circumference of the axial compression ring assembly is coated with a cylinder section, the circumference of the cylinder section is provided with a wood pattern assembly, a cavity is formed between the cylinder section and the wood pattern assembly, the cavity is filled with filling gypsum, and the outer portion of the wood pattern assembly is tensioned and fixed to a bottom plate at the bottom end of the wood pattern assembly through an inclined supporting column. Deformation of thin-wall parts caused by clamping during machining can be effectively avoided, the core problems of rigid supporting and clamping deformation prevention are effectively solved, equipment limitation is effectively avoided, repeated use is easy, economical efficiency is good, the requirement for large-specification aluminum alloy barrel section vertical lathe boring rough and finish machining is met, the structure is simple, the implementation effect is good, and the machining cost is low. A large amount of manpower and material resources are saved, the trial-manufacturing cost is reduced, and the application and popularization value is high.

Description

Technical Field

[0001] The invention relates to a vertical boring tool for a deep hole thin-walled cylinder segment, belonging to. Background Art

[0002] Thin-walled parts are widely used in various fields due to their light weight and small space occupation. For example, in the aerospace field, thin-walled parts are used to manufacture aircraft and rocket structural parts to reduce overall weight and improve efficiency. In engineering practice, thin-walled parts usually refer to parts with a ratio of part diameter to part wall thickness greater than 15. Such parts have poor rigidity, are easy to deform, and are sensitive to cutting heat. Therefore, appropriate clamping and support measures should be taken during processing to reduce deformation to ensure that product accuracy is controlled.

[0003] The following takes an aluminum alloy deep-hole thin-wall workpiece in production practice as an example to illustrate the application of vertical boring tooling for large-sized thin-walled cylinder sections.

[0004] The structural characteristics of aluminum alloy thin-walled workpieces: the inner diameter of the barrel section is mm, the inner hole cylindricality is 0.2mm; the total length is 1844mm; the wall thickness is 9.5mm; the diameter-thickness ratio is greater than 32, and the depth-diameter ratio is greater than 6. It is a typical deep-hole thin-walled part. The part is a rotating body structure, and can be turned to achieve the forming and precision requirements. However, since the boring hole is as deep as 1844mm (it is required to be bored through in one go), and the inner hole is the benchmark for the fine machining of the outer shape, achieving the precision machining of the inner hole is the key to the success of the product processing.

[0005] Due to the lack of an extended horizontal CNC lathe equipped with a deep hole boring bar and a matching deep hole boring tool holder, a 5-meter CNC vertical lathe is actually used to achieve deep hole processing.

[0006] Special tooling was designed and manufactured to solve the core issues of rigid support and prevention of clamping deformation, thus achieving qualified product delivery. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a vertical boring tool for deep hole thin wall cylinder sections, which can effectively solve the problems of rigid support and preventing the core from being deformed by clamping, 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 barrel segment, comprising an axial clamping ring assembly; the top of the axial clamping ring assembly is coaxially connected to a fixed upper positioning plate, the axial clamping ring assembly is circumferentially covered with the barrel segment, a wooden mold assembly is circumferentially provided with the barrel segment and a cavity is formed between the barrel segment and the wooden mold assembly, the cavity is filled with filling gypsum, and the outside of the wooden mold assembly is tightened and fixed to a base plate at the bottom end of the wooden mold assembly by an oblique support column.

[0010] A non-contact cavity is formed between the barrel section and the wooden mold assembly, so that the filled gypsum is integrally formed and circumferentially closed.

[0011] The wooden mold assembly is a longitudinal multi-section structure coaxially butted into a cylindrical shape.

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

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

[0014] The wooden formwork assembly crosses the transverse tie rod assembly at the vertex position of the triangle, and the oblique support column is fixed to the wooden formwork assembly through the uppermost transverse tie rod assembly.

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

[0016] An upper transition ring is fixed on the top of the wooden mold assembly, and the outer diameters of the upper transition ring and the upper positioning plate are consistent.

[0017] Directly below the bottom end of the axial clamping ring assembly is a lower positioning support assembly for placing thin-walled parts on the bottom plate.

[0018] A cylindrical column assembly is tightly arranged on the inner wall of the wooden mold assembly.

[0019] The beneficial effects of the present invention are: 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, economical, and meets the rough and fine processing needs of large-size aluminum alloy barrel section vertical lathe boring, simple structure, good implementation effect, saving a lot of manpower and material resources, reducing trial production costs, and high application and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 yes Figure 1 Top view of the .

[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-barrel section, 7-lateral tie rod assembly, 8-wooden mold assembly, 9-filling gypsum, 10-lower positioning support assembly, 11-base plate. DETAILED DESCRIPTION

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

[0024] Example 1

[0025] like Figure 1 , Figure 2 The vertical boring tool for a deep-hole thin-walled barrel segment shown in the figure includes an axial clamping ring assembly 1; the top of the axial clamping ring assembly 1 is coaxially connected to a fixed upper positioning plate 2, the axial clamping ring assembly 1 is circumferentially covered with a barrel segment 6, the barrel segment 6 is circumferentially provided with a wooden mold assembly 8 and a cavity is formed between the barrel segment 6 and the wooden mold assembly 8, the cavity is filled with filling gypsum 9, and the outside of the wooden mold assembly 8 is tightened and fixed to a base 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, and further optimized in details, a non-contact cavity is formed between the barrel section 6 and the wooden mold assembly 8, so that the filling gypsum 9 is integrally formed and circumferentially closed.

[0028] Furthermore, the wooden mold assembly 8 is a longitudinal multi-section structure coaxially butted into a cylindrical shape.

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

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

[0031] Furthermore, the wooden formwork assembly 8 crosses the transverse tie rod assembly 7 at the vertex of the triangle, and the oblique support column 5 is fixed to the wooden formwork assembly 8 through the uppermost transverse tie rod assembly 7 .

[0032] Example 3

[0033] Consistent with Example 1, and further optimized in details, the bottom plate 11 is disc-shaped, and the fixing points of the inclined support columns 5 on the bottom plate 11 are located at the edge of the bottom plate 11 .

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

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

[0036] Furthermore, a cylindrical column assembly 3 is closely disposed on the inner wall of the wooden mold assembly 8 .

[0037] Example 4

[0038] Combined with the above embodiment, assembled on a 5-meter vertical lathe workbench;

[0039] The barrel section 6 is positioned, limited, and axially locked by the upper positioning plate 2, the lower positioning support assembly 10, the bottom 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 protection layer;

[0041] The tooling wood mold assembly 8 is fixed layer by layer to the periphery of the column assembly 3 by means of the transverse tie rod assembly 7, and a non-contact cavity is formed between the barrel section 6 and the wood mold assembly 8;

[0042] The filling plaster 9 is poured layer by layer in the cavity; after the filling plaster 9 is (approximately) half-solidified, the filling plaster 9 is poured upward layer by layer, and finally the barrel section 6, the filling plaster 9, and the column assembly 3 form a fully covered radial support body;

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

Claims

1. A vertical boring tool for a deep hole thin-walled cylinder section, comprising an axial clamping ring assembly (1), characterized in that: The top of the axial clamping ring assembly (1) is coaxially connected to a fixed upper positioning plate (2); the axial clamping ring assembly (1) is circumferentially covered with a barrel section (6); a wooden mold assembly (8) is circumferentially provided around the barrel section (6); and a cavity is formed between the barrel section (6) and the wooden mold assembly (8); the cavity is filled with filling gypsum (9); the outside of the wooden mold assembly (8) is tightened and fixed to a bottom plate (11) at the bottom end of the wooden mold assembly (8) by an oblique support column (5).

2. The vertical boring tool for deep hole thin wall cylinder section as claimed in claim 1, characterized in that: A non-contact cavity is formed between the barrel section (6) and the wooden mold assembly (8), so that the filling gypsum (9) is integrally formed and circumferentially closed.

3. The vertical boring tool for deep hole thin wall cylinder section as claimed in claim 1, characterized in that: The wooden mold assembly (8) is a longitudinal multi-section structure coaxially butt-jointed into a cylindrical shape.

4. The vertical boring tool for deep hole thin wall cylinder section as claimed in claim 3, characterized in that: The top and bottom ends of the wooden mold assembly (8) are tightened and fixed by a transverse tie rod assembly (7).

5. The vertical boring tool for deep hole thin wall cylinder section as claimed in claim 1, characterized in that: The cross section of the wooden mold assembly (8) is triangular, the cross section of the barrel section (6) is circular, the center of the cross section of the barrel section (6) is located at the center point of the cross section of the wooden mold assembly (8), and the fixing point of the inclined support column (5) on the wooden mold assembly (8) is located at the triangular vertex of the wooden mold assembly (8).

6. The vertical boring tool for deep hole thin wall cylinder section as claimed in claim 5, characterized in that: The wooden formwork assembly (8) crosses the transverse tie rod assembly (7) at the vertex position of the triangle, and the oblique support column (5) is fixed to the wooden formwork assembly (8) through the uppermost transverse tie rod assembly (7).

7. The vertical boring tool for deep hole thin wall cylinder section as claimed in claim 1, characterized in that: The bottom plate (11) is disc-shaped, and the fixing point of the oblique support column (5) on the bottom plate (11) is located at the edge of the bottom plate (11).

8. The vertical boring tool for deep hole thin wall cylinder section as claimed in claim 1, characterized in that: An upper transition ring (4) is fixed on the top of the wooden mold assembly (8), and the outer diameters of the upper transition ring (4) and the upper positioning plate (2) are consistent.

9. The vertical boring tool for deep hole thin wall cylinder section as claimed in claim 1, characterized in that: Directly below the bottom end of the axial clamping ring assembly (1), there is a lower positioning support assembly (10) on the bottom plate (11) for placing thin-walled parts.

10. The vertical boring tool for deep hole thin wall cylinder section according to claim 1, characterized in that: A cylindrical column assembly (3) is tightly arranged on the inner wall of the wooden mold assembly (8).

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