A tool for barrel lumen subtraction

Abstract

The application discloses a tool for subtracting the inner cavity of a cylinder, relates to the technical field of mechanical tool clamps, and solves one of the problems that deformation is prone to occurring in the process of machining a thin-walled cylinder, a clamping mode is single, or adaptability is poor, and the like in the prior art, and the tool comprises a first positioning end seat, a second positioning end seat, an adjusting rod and a contour clamping assembly; the two ends of the adjusting rod are detachably connected with the first positioning end seat and the second positioning end seat, respectively, and the tool realizes self-adaptive clamping of the thin-walled cylinder to reduce deformation, meets the clamping requirements of the outer wall of a cylinder with different sizes and wall thicknesses, and improves the universality of the tool.

Description

Technical Field

[0001] This invention relates to the field of mechanical tooling and fixture technology, and in particular to a tooling for material reduction in the inner cavity of a cylinder. Background Technology

[0002] Large deep-cavity thin-walled cylinders are widely used in aviation, aerospace, energy equipment and other fields. They are characterized by large cylinder length, high cavity depth, thin wall thickness and strict requirements for the precision of the outer wall surface. They often adopt axial segmented inner and outer wall subtractive processing technology to ensure the overall forming precision of the cylinder.

[0003] Existing clamping fixtures used in subtractive machining of cylinders are mostly one-piece, fixed, rigid structures. The overall length, support position, and support angle of the fixture are all fixed, making it impossible to adaptively adjust to different cylinder lengths, outer diameters, and machining intervals. This results in extremely poor adaptability and versatility. Furthermore, traditional fixtures often employ single-point rigid clamping, leading to concentrated clamping forces. This cannot accommodate the external wall surface deviations and minute dimensional tolerances that arise during cylinder forming, easily causing machining defects such as localized pressure indentation, external wall surface deformation, and dimensional errors in thin-walled cylinders. Existing clamping fixtures also have a limited clamping mode, only capable of either rigid or elastic clamping. They cannot match appropriate support and protection methods based on the actual wall thickness differences of the cylinder: for cylinders with standard wall thicknesses, rigid clamping easily causes stress concentration and machining vibration deformation; for ultra-thin-walled cylinders, conventional elastic clamping easily causes cylinder compression deformation, making it difficult to simultaneously ensure clamping stability and machining protection for cylinders with different wall thicknesses. Furthermore, traditional cylinder clamping fixtures suffer from poor end positioning structure adaptability and low centering accuracy. During machining, problems such as wobbling, eccentricity, and axial movement of the cylinder end are prone to occur, resulting in poor joint accuracy of cylinder segment machining and difficulty in ensuring overall coaxiality. At the same time, traditional fixtures are inconvenient to disassemble, assemble, and repair, and have high maintenance costs, making them difficult to adapt to the continuous, high-precision subtractive machining requirements of large, deep-cavity, thin-walled cylinders of multiple specifications and batches. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a tooling for material reduction in the inner cavity of a cylinder, in order to solve one of the problems in the prior art that are prone to deformation, single clamping mode or poor adaptability during the processing of thin-walled cylinders.

[0005] The objective of this invention is mainly achieved through the following technical solutions: A method for manufacturing by adding or subtracting materials in sections, characterized by comprising the following steps: Divide the cylinder into sections along the axial direction; The number of times materials need to be added or removed is determined based on the number of sections; Select additive substrate; Raw material model design and arc additive manufacturing path planning; Select the cavity material reduction scheme and cavity material reduction positioning fixture according to the internal cavity structural characteristics of different sections of the cylinder; Perform internal cavity feature machining to complete the addition and subtraction of materials in the inner cavity of the cylinder.

[0006] Furthermore, the number of additive manufacturing steps corresponds to the number of structural sections in the cylindrical body.

[0007] Furthermore, a substrate material with properties consistent with the cylinder material is selected; Determine the thickness of the partition and allow for rough machining allowance; A standardized process reference system, including reference surfaces, reference holes, and locating pin holes, is processed on the substrate for positioning and reference transfer in all subsequent processing sections. During the overall machining stage of the cylinder, the substrate is machined into an integrated process reference boss by utilizing the machining allowance reserved on the substrate.

[0008] Furthermore, for narrow and deep cavity areas, a horizontal machining center is selected in conjunction with a high-rigidity extended rod tool for machining, and the material reduction operation is completed by using segment internal cavity material reduction fixtures and integral workpiece internal cavity material reduction fixtures respectively.

[0009] Furthermore, the planned arc additive manufacturing path adopts a composite motion mode that combines circular motion with reciprocating short linear motion.

[0010] Furthermore, based on the location of the ribs in the inner cavity of the cylinder and the location of the end sealing partitions, and combined with the limit depth of the inner cavity that the equipment can process, the cylinder is divided into several independent structural process sections along the axial direction.

[0011] Furthermore, after each material addition or subtraction processing step is completed, process benchmark testing and correction are performed.

[0012] Furthermore, after completing the alternating processing of added and subtracted materials, the process also includes precision machining of the cylinder's shape.

[0013] Furthermore, clamping bosses are symmetrically machined at the front and rear ends of the cylinder. These clamping bosses are used for positioning and machining the features of the front and rear end faces of the cylinder.

[0014] Furthermore, during the internal cavity material reduction process, an internal cavity material reduction positioning fixture is used for clamping and fixing.

[0015] Furthermore, the positioning fixture for the internal cavity subtractive material includes a first end, a positioning rod, a second end, and a clamping part. The two ends of the positioning rod are respectively connected to the first end and the second end, and multiple sets of the clamping parts are arranged at intervals along the length direction of the positioning rod. The clamping part includes a fixing part, a support frame, and a conforming mechanism. The fixing part is locked and fixed to the outside of the positioning rod. The support frame is fixedly installed on the outside of the fixing part. The conforming mechanism is disposed on the support frame and is used to fit against the outer wall of the cylinder.

[0016] Furthermore, the conformal mechanism includes a conformal fixing part, a movable part, a spring, and a conformal plate. One end of the conformal fixing part is mounted on the support frame, and the other end of the conformal fixing part is connected to the movable part. The movable part can slide along the axial direction of the conformal fixing part. The spring is sleeved on the outside of the rod of the conformal fixing part, and both ends of the spring abut against the movable part and the support frame, respectively. The conformal plate is disposed at the end of the movable part and fits against the outer wall of the cylinder.

[0017] Furthermore, the support frame includes a first support plate and a second support plate. The first support plate has an arc-shaped plate structure and the arc radius matches the arc radius of the outer wall of the cylinder. The second support plate is arranged along the circumference of the first support plate. The conformal fixing part is arranged on the inner side of the first support plate, and the conformal mechanism is arranged along the length direction of the second support plate.

[0018] Furthermore, both the first end and the second end are provided with mounting holes for installing the positioning rod. The mounting holes are elongated structures, and the positioning rod can be adjusted in assembly position along the length of the elongated adjustment hole to adapt to cylinders of different diameters.

[0019] Furthermore, a tooling for subtractive material from the inner cavity of a cylinder includes a first positioning end seat, a second positioning end seat, and an adjusting rod; the two ends of the adjusting rod are detachably connected to the first positioning end seat and the second positioning end seat, respectively.

[0020] Furthermore, the adjusting rod is a threaded screw telescopic structure.

[0021] Furthermore, both the first positioning end seat and the second positioning end seat are hollow structures, and the edges of both the first positioning end seat and the second positioning end seat are provided with mounting holes for installing the adjusting rod.

[0022] Furthermore, the ends of the first positioning end seat and the second positioning end seat are provided with grooves, which are used to press the end face of the cylinder.

[0023] Furthermore, the first positioning end seat includes a cover plate and an insertion protrusion, the insertion protrusion being used to insert into the interior of the cylinder end.

[0024] Furthermore, the first positioning end seat and the second positioning end seat have symmetrical structures.

[0025] Furthermore, the mounting hole is an elongated hole.

[0026] Furthermore, the mounting hole extends toward the center of the cover plate and is used to mount the adjusting rod.

[0027] Furthermore, the insertion protrusion is located at the center of the end face of the cover plate.

[0028] Furthermore, a tooling clamping method for reducing material in the inner cavity of a cylinder, using any of the toolings described above, includes: selecting a suitable tooling according to the length of the cylinder; completing the positioning and clamping of the cylinder end; clamping the cylinder as a whole; and carrying out the inner cavity material reduction operation after clamping is completed.

[0029] Furthermore, the tooling also includes a conformal clamping assembly, which includes a conformal fitting mechanism, a support frame, and a fixing assembly. The fixing assembly is sleeved on the outside of the adjusting rod, the support frame is disposed on the fixing assembly, and the conformal fitting mechanism is installed on the support frame. The conformal fitting mechanism is used to adjust the fitting state between the tooling and the outer wall of the cylinder.

[0030] Furthermore, the conformal fitting mechanism includes a mechanism fixing base, a buffer member, a telescopic sliding base, and a conformal fitting plate; the mechanism fixing base is disposed inside the bearing support frame; the telescopic sliding base is sleeved on one end of the mechanism fixing base and can slide along the axial direction of the mechanism fixing base; the buffer member is sleeved on the outside of the mechanism fixing base, and the two ends of the buffer member abut against the inner end face of the telescopic sliding base and the inner end face of the bearing support frame, respectively; the conformal fitting plate is disposed at the outer end of the telescopic sliding base.

[0031] Furthermore, the tooling also includes a clamping part, which is disposed on the outer wall of the insertion protrusion for clamping the inner wall of the cylinder; the clamping part includes a guide clamping rod, a clamping block and a clamping spring, the guide clamping rod is disposed in a guide hole opened on the cover plate; the clamping block is disposed at the end of the guide clamping rod; the clamping spring is sleeved on the outside of the guide clamping rod, and the two ends of the clamping spring abut against the end face of the guide clamping rod and the bottom of the guide hole, respectively.

[0032] Furthermore, a fixing post is provided at the bottom of the guide hole, and the two ends of the tightening spring are respectively sleeved on the guide tightening rod and the fixing post.

[0033] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. To address the problems of concentrated force during clamping by traditional rigid tooling, inability to adapt to minute dimensional deviations in cylinder forming, or easy deformation during processing of thin-walled cylinders, the clamping tooling of this invention includes a first positioning end seat, an adjusting rod, a conformal clamping assembly, and a second positioning end seat. The conformal clamping assembly can finely adjust the fitting state according to the curvature of the outer wall of the cylinder, uniformly bearing force and providing support. This overcomes the drawbacks of point-type concentrated clamping by traditional rigid tooling, disperses cutting stress, vibration stress, and processing thermal stress, reduces the probability of deformation during processing of thin-walled cylinders, and improves the overall forming quality of the cylinder.

[0034] 2. To address the shortcomings of traditional tooling clamping methods, which are limited in their versatility and inability to simultaneously meet the requirements of clamping stability for cylinders with standard wall thicknesses and preventing deformation in ultra-thin-walled cylinders, this invention proposes differentiated clamping and support modes for cylinders with varying wall thicknesses. For cylinders with standard thicknesses (≥3mm), elastic clamping is employed to enhance clamping firmness and processing stability. For thin-walled cylinders (<3mm), rigid surface support clamping is used to reduce elastic clamping stress and minimize defects such as cylinder indentation, surface deformation, and dimensional deviations. This approach balances the processing adaptability and protection for cylinders with different wall thicknesses, thereby improving the tooling's versatility.

[0035] 3. To address the issues of insecure fixing and poor adaptability of traditional tooling at the cylinder end, this invention employs an insert protrusion positioned at the center of the inner end face of the cover plate. Both the cover plate and the insert protrusion utilize a hollow, through-structure, reserving space for material reduction within the inner cavity. The insert protrusion can be inserted into the cylinder end to achieve sealing and limiting of the cylinder end, completing the initial axial positioning of the cylinder. Multiple sets of clamping parts are arranged in a ring array on the outer peripheral sidewall of the insert protrusion. Through adaptive telescoping, they can adapt to cylinders of different inner diameters, achieving multi-point clamping and positioning on the inner wall of the cylinder. This enables bidirectional axial limiting and radial elastic centering clamping of the cylinder end, correcting the coaxiality of the cylinder clamping, reducing problems such as cylinder end swaying, eccentricity, and axial movement during processing, further improving the tooling clamping accuracy and overall support stability.

[0036] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the specification or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the content specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0037] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0038] Figure 1 A schematic diagram of the structure of a large, deep-cavity, thin-walled cylindrical body; Figure 2 This is a schematic diagram of the overall tooling structure in Example 1; Figure 3 This is a schematic diagram of the conformal clamping assembly structure in Embodiment 1; Figure 4 This is a schematic diagram of the conformal fitting mechanism structure in Embodiment 1; Figure 5 This is a schematic diagram (a) of the first positioning end seat structure in Embodiment 2; Figure 6 This is a schematic diagram (II) of the first positioning end seat structure in Embodiment 2; Figure 7 This is a cross-sectional view of the first positioning end seat structure in Embodiment 2; Figure 8 This is a magnified view of part A in Example 2.

[0039] Figure label: 1-First positioning end seat; 11-Cover plate; 111-Guide hole; 112-Fixing post; 12-Plug-in protrusion; 13-Tightening part; 131-Tightening block; 132-Guide tightening rod; 133-Tightening spring; 14 - Mounting holes; 2-Adjusting rod; 3-Conformal clamping assembly; 31-Conformal fitting mechanism; 311-Mechanism fixing base; 312-Buffer component; 313-Telescopic sliding base; 314-Conformal fitting plate; 32-Bearing support frame; 321-Fitting support plate; 322-Lateral reinforcement support base; 33-Fixing component; 331-Sleeve; 332-Tightening bolt; 4-Second positioning end seat. Detailed Implementation

[0040] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0041] Example 1 This invention provides a tooling (hereinafter referred to as "tooling") for subtractive manufacturing of the inner cavity of a cylindrical body. It aims to solve the problem that existing tooling for subtractive manufacturing of the inner cavity of large, deep-cavity, thin-walled cylindrical bodies is mostly fixed in structure, lacking versatility or having a single clamping mode. The large, deep-cavity, thin-walled cylindrical body structure, such as... Figure 1 As shown.

[0042] Specifically, such as Figure 2As shown, the fixture includes a first positioning end seat 1, an adjusting rod 2, a conformal clamping assembly 3, and a second positioning end seat 4. The adjusting rod 2 employs a threaded screw telescopic structure, enabling stepless adjustment of its axial length to accommodate cylinders of different lengths. Both ends of the adjusting rod 2 are detachably connected to the first positioning end seat 1 and the second positioning end seat 4, respectively. The first and second positioning end seats 1 and 4 are hollow structures, with mounting holes for the adjusting rod 2 on their edges, secured with bolts. Grooves are provided at both ends, engaging with the cylinder edges to facilitate disassembly, inspection, and maintenance of the fixture, reducing equipment operation and maintenance costs.

[0043] Preferably, multiple sets of conformal clamping components 3 are provided, arranged along the axial length of the adjusting rod 2, with the spacing between the components matching the length of the cylinder to be processed. This allows for simultaneous multi-point support and positioning across multiple processing areas of the cylinder, eliminating the need for changing tooling in different sections and adapting to the requirements of continuous subtractive processing of the cylinder. The multiple sets of conformal clamping components 3 are fixedly assembled on the outside of the adjusting rod 2, serving as the core clamping structure for fitting and limiting the clamping of the cylinder wall, thus improving the structural stability during the cylinder processing.

[0044] Furthermore, to address the issues of concentrated force during rigid clamping in traditional tooling, inability to accommodate minute dimensional deviations in cylinder forming, and easy deformation of thin-walled workpieces, such as... Figure 3 As shown, the conformal clamping assembly 3 includes a conformal fitting mechanism 31, a support frame 32, and a fixing assembly 33. The fixing assembly 33 includes a sleeve 331 and a tightening bolt 332. The sleeve 331 is slidably fitted onto the outside of the adjusting rod 2. After the position is adjusted, it is radially tightened and locked by the tightening bolt 332, improving the stability of the assembly position of each clamping assembly. The fixing assembly 33 is located at the end of the support frame 32, which serves as the support carrier for the conformal fitting mechanism 31, providing the installation support foundation and force-bearing carrier for the conformal fitting mechanism 31. The conformal fitting mechanism 31 is an adaptive adjustment component, which can adaptively fine-tune the fitting state according to the curvature of the outer wall surface and the actual wall thickness of the cylinder to be processed, achieving gapless fitting and uniform force clamping, adapting to minor dimensional deviations after the cylinder is formed.

[0045] Specifically, such as Figure 4As shown, the conformal fitting mechanism 31 includes a mechanism fixing base 311, a buffer 312, a telescopic sliding base 313, and a conformal fitting plate 314. The mechanism fixing base 311 is a columnar rigid fixing body, with one end fixed to the inner side of the bearing support frame 32 for structural positioning. The telescopic sliding base 313 is slidably sleeved on the outer side of the free end of the mechanism fixing base 311, and can reciprocate and extend along the axial direction of the mechanism fixing base 311. The buffer 312 is preferably a compression spring, coaxially sleeved on the outside of the rod of the mechanism fixing base 311, with both ends of the buffer 312 connected to the inner end of the telescopic sliding base 313. The inner end face of the support frame 32 elastically abuts against the telescopic sliding base 313, continuously providing an outward elastic clamping force to form a buffer protection structure, which can not only ensure the clamping tightness, but also buffer processing vibration and offset local overpressure stress; the conformal fitting plate 314 is fixed to the outer end of the telescopic sliding base 313, and is a fitting component that directly contacts the outer wall of the cylinder. It can move axially in sync with the telescopic sliding base 313, adapting to the irregular outer wall curved surface and small dimensional deviations of the cylinder, realizing adaptive fitting and positioning, so that the force on the outer wall of the cylinder is evenly distributed.

[0046] The support frame 32 includes a fitting support plate 321 and lateral reinforcement support seats 322. The fitting support plate 321 is a large-radius arc-shaped plate structure, with its surface curvature matching the standard outer wall arc of the cylinder to be processed. This allows for a large-area surface contact support structure with the outer wall of the cylinder, replacing traditional point clamping. The lateral reinforcement support seats 322 are flat, rigid support structures, with multiple sets of lateral reinforcement support seats 322 evenly arranged and fixedly connected along the circumference of the fitting support plate 321. Mechanism fixing bases 311 are evenly arrayed on the inner surface of the fitting support plate 321, and the overall conformal fitting mechanism 31 is arrayed along the length of the lateral reinforcement support seats 322, further optimizing the overall stress structure and improving the stability and structural strength of the tooling support.

[0047] It is worth noting that when performing material reduction in the inner cavity of the cylinder, this tooling is equipped with two differentiated support modes to specifically reduce clamping deformation defects: For conventional cylinders with a wall thickness ≥3mm, the elastic clamping effect of the buffer 312 is used to make the conformal fitting plate 314 adaptively fit the outer wall of the cylinder, flexibly clamping and positioning, buffering processing vibration and stress, and improving processing stability; For ultra-thin-walled cylinders with a wall thickness <3mm, the buffer 312 is manually compressed to eliminate the elastic clamping force, and the cylinder is rigidly supported only by the arc-shaped plate surface of the fitting support plate 321, reducing thin-wall deformation defects caused by elastic compression.

[0048] Compared with existing technologies, the clamping fixture adopts a flexible, conformal, and adaptive structure that can adapt to the irregular curved surface error of the outer wall of the cylinder, ensuring uniform fit and distributed force, reducing deformation during the processing of thin-walled workpieces, and improving the processing connection accuracy of each section; at the same time, it distinguishes different wall thickness support modes, taking into account both the stability of conventional cylinder clamping and the protection of ultra-thin cylinder processing, thus improving adaptability and versatility.

[0049] Example 2 This embodiment provides a clamping fixture for subtractive material from the inner cavity of a cylinder, such as... Figure 5 As shown, the difference from Embodiment 1 is that the structures of the first positioning end seat 1 and the second positioning end seat 4 are different, which aims to solve the problems of unstable fixing and poor adaptability of the cylinder end, and further improve the adaptability of the tooling to cylinders with different inner diameters and the stability of end positioning.

[0050] Specifically, the first positioning end seat 1 and the second positioning end seat 4 have symmetrical structures and identical functions. The following explanation uses the first positioning end seat 1 as an example. Figure 6 and 7 As shown, the first positioning end seat 1 includes a cover plate 11, an insertion protrusion 12, a tightening part 13, and a mounting hole 14. The insertion protrusion 12 is integrally set at the center of the inner end face of the cover plate 11. Both the cover plate 11 and the insertion protrusion 12 adopt a hollow through structure, reserving space for material reduction in the inner cavity. The insertion protrusion 12 can be inserted into the end of the cylinder to achieve the limiting of the end of the cylinder and complete the initial axial positioning of the cylinder.

[0051] Furthermore, to address the issue of poor adaptability of the clamping fixture to cylinders with different inner diameters, the edge of the cover plate 11 is provided with an elongated mounting hole 14. The mounting hole 14 extends toward the center of the cover plate, allowing for flexible fine-tuning of the end assembly position of the adjusting rod 2, changing the enclosing angle of the outer support structure, adapting to cylinders with different inner diameters, and improving the versatility of the fixture.

[0052] Furthermore, to address the problems of rigid fixation in traditional end-clamping structures, inability to adapt to cylinders with different inner diameters, and loose end clamping, multiple sets of clamping parts 13 are provided. These multiple sets of clamping parts 13 are arranged in a ring array and installed on the outer peripheral sidewall of the insertion protrusion 12. They can adaptively expand and contract to adapt to cylinders with different inner diameters, achieving multi-point clamping and positioning on the inner wall of the cylinder. Figure 8As shown, the clamping part 13 includes a clamping block 131, a guide clamping rod 132, and a clamping spring 133. The edge of the cover plate 11 extends outward and has a guide hole 111 for accommodating the clamping rod 132. A fixing post 112 is provided at the bottom of the guide hole 111. The two ends of the clamping spring 133 are respectively sleeved on the clamping rod 132 and the fixing post 112 and abut against the end face of the clamping rod 132 and the bottom of the hole 111. The clamping block 131 adopts an arc-shaped curved surface structure that matches the inner wall of the cylinder, which can form a surface contact clamping support with the inner wall of the cylinder. Multiple sets of clamping parts 13 synchronously and adaptively extend and retract to adapt to cylinders with different inner diameters, realize radial elastic centering correction at the end, reduce problems such as clamping eccentricity, end shaking, and axial movement, and improve the overall clamping coaxiality and machining connection accuracy of the cylinder.

[0053] Example 3 This embodiment provides a clamping method for a cylinder with internal cavity material reduction, using the clamping fixture described in the above embodiment to clamp the cylinder, specifically including: Step 1: Select the appropriate tooling based on the cylinder length. Based on the overall length, outer diameter, and processing section spacing of the cylinder to be processed, adjust the axial extension length of the adjusting rod 2 to achieve overall tooling length adaptation. Based on the processing length of the cylinder, adjust the assembly spacing of multiple sets of conformal clamping components 3 on the adjusting rod 2 to match the component arrangement spacing with the cylinder segment processing spacing. Tighten the top bolts 332 of the fixing components 33 to fix the assembly position of each set of conformal clamping components 3. Simultaneously, based on the inner diameter of the cylinder, use the elongated mounting holes 14 of the first positioning end seat 1 and the second positioning end seat 4 to fine-tune the end mounting position of the adjusting rod 2, calibrate the enclosing support angle of the fitting support plate 321, and adapt to the outer wall curvature of the cylinder.

[0054] Step 2, positioning and clamping the end of the cylinder, specifically includes the following steps: Step 21: Place the adjusted tooling into the central area inside the cylinder to be processed, and manually fine-tune the position of the tooling so that the central axis of the adjusting rod 2 coincides with the central axis of the cylinder.

[0055] Step 22, Axial limiting and fixing of the cylinder: Insert the insertion protrusions 12 of the first positioning end seat 1 and the second positioning end seat 4 into the inside of the two end ports of the cylinder respectively, so that the limiting protrusions at both ends press against the end face of the cylinder.

[0056] Step 23, radial centering and clamping of the end of the cylinder: After the end of the cylinder is inserted into place, the elastic pushing force of the clamping spring 133 inside the self-adaptive clamping part 13 at both ends drives multiple sets of annular array of bow-shaped clamping blocks 131 to push outward synchronously and fit against the inner wall of the cylinder; the bow-shaped structure forms a surface contact support with the inner wall of the cylinder.

[0057] Step 3, clamping the cylinder: Select the appropriate support mode according to the wall thickness of the cylinder to be processed: When the wall thickness of the cylinder is ≥3mm, the buffer 312 of the conformal fitting mechanism 31 is kept in an elastic pressing state, and the telescopic sliding base 313 is driven to extend outward by the buffer spring, so that the conformal fitting plate 314 is tightly fitted to the outer wall of the cylinder. When the wall thickness of the cylinder is less than 3mm, manually press the retractable sliding base 313 to compress the buffer 312 to eliminate the elastic clamping force, and rely solely on the arc-shaped plate surface of the support plate 321 to fit against the outer wall of the cylinder for large-area support.

[0058] Step 4, clamping complete, perform internal cavity material reduction: After clamping, perform internal and external wall material reduction processing on each section of the cylinder in sequence. During the processing, multiple sets of conformal clamping components 3 provide full-area support and limit simultaneously, without the need to disassemble or replace the tooling; after a batch of cylinder processing is completed, loosen the top bolt 332 and the end positioning structure to quickly disassemble the workpiece. The tooling can be directly adapted to the next specification or finely adjusted to adapt to internal cavity material reduction of cylinders of different sizes, and can be reused in cycles.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A tooling for subtractive processing of material in the inner cavity of a cylinder, characterized in that, include: The first positioning end seat (1), the second positioning end seat (4), and the adjusting rod (2); the two ends of the adjusting rod (2) are detachably connected to the first positioning end seat (1) and the second positioning end seat (4), respectively.

2. The tooling according to claim 1, characterized in that, The adjusting rod (2) is a threaded screw telescopic structure.

3. The tooling according to claim 1, characterized in that, Both the first positioning end seat (1) and the second positioning end seat (4) are hollow structures, and the edges of the first positioning end seat (1) and the second positioning end seat (4) are provided with mounting holes (14) for installing the adjusting rod (2).

4. The tooling according to claim 1, characterized in that, The ends of the first positioning end seat (1) and the second positioning end seat (4) are provided with grooves, which are used to press the end face of the cylinder.

5. The tooling according to claim 3, characterized in that, The first positioning end seat (1) includes: a cover plate (11) and an insertion protrusion (12), the insertion protrusion (12) being used to be inserted into the interior of the cylinder end.

6. The tooling according to claim 1, characterized in that, The first positioning end seat (1) and the second positioning end seat (4) are structurally symmetrical.

7. The tooling according to claim 5, characterized in that, The mounting hole (14) is an elongated hole.

8. The tooling according to claim 7, characterized in that, The mounting hole (14) extends toward the center of the cover plate (11) and is used to mount the adjusting rod (2).

9. The tooling according to claim 3, characterized in that, The insertion protrusion (12) is located at the center of the end face of the cover plate (11).

10. A tooling clamping method for subtractive material from the inner cavity of a cylinder, characterized in that, The tooling according to any one of claims 1 to 9 comprises: Step 1: Select the appropriate tooling according to the length of the cylinder; Step 2: Positioning and clamping the end of the cylinder; Step 3: Clamp the cylinder; Step 4: After clamping, perform material reduction in the inner cavity of the cylinder.

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