A tooling for machining a cylinder

Abstract

This utility model relates to the field of hydraulic support technology, and more particularly to a tooling for machining cylinder barrels. This tooling is used to cooperate with the cylinder barrel and hydraulic center support to machine the cylinder barrel's stop. Specifically, it includes an outer sleeve and a connecting piece; the outer sleeve can replace the support socket and is suitable for clamping by the hydraulic center support. This utility model achieves a detachable connection between the outer sleeve and the connecting piece, with the outer sleeve coaxially sleeved onto the cylinder barrel's stop end, effectively solving the problem of "no suitable support socket" in cylinder barrel stop machining. This utility model eliminates the need to machine support sockets on the cylinder barrel body, avoiding machining interference and structural damage caused by dense attachments and deep cylinder wall holes, thus ensuring the integrity of the cylinder barrel. The detachable design of this utility model can also adapt to cylinder barrels of various specifications, enabling reuse. Disassembly after machining is convenient and does not affect subsequent processes. It completely avoids the inner hole deformation caused by post-welding attachments in existing technologies, eliminating inefficient honing repair and significantly improving machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support technology, and in particular to a tooling for machining cylinder barrels. Background Technology

[0002] Hydraulic supports are the core support equipment in fully mechanized coal mining faces. The reliability of their matching cylinders directly determines the safety and efficiency of mining operations. The cylinder barrel, as the core pressure-bearing component of the cylinder, is crucial for ensuring cylinder performance due to its machining precision. A hydraulic support cylinder typically consists of a cylinder body, piston rod, ring sleeve, and sealing assembly. The cylinder body is welded to the cylinder barrel at the cylinder bottom to form a closed pressure chamber. The dimensional accuracy of the cylinder barrel's inner bore, such as diameter tolerance, roundness, and cylindricity, directly affects the piston rod's movement accuracy and sealing reliability, thus determining the jack's service life.

[0003] To simplify the hydraulic circuit layout and reduce external pipeline welding processes, existing hydraulic cylinders generally employ cylinder barrels with deep-hole structures in the cylinder wall. This involves directly machining axial deep holes in the cylinder barrel sidewall as internal hydraulic passages. While this structure optimizes the assembly process, it severely limits the cylinder barrel wall thickness. Furthermore, during the machining of the cylinder barrel's stop, a support recess needs to be installed at one end near the stop for a hydraulic center support to clamp and achieve stable positioning. The outer diameter of this support recess must be smaller than that of the rest of the cylinder barrel. Additionally, multiple accessories such as fixing posts, lugs, and trunnions need to be welded to the cylinder barrel's periphery to connect with external mechanisms. These structural requirements create multiple contradictions: when the accessories are densely distributed around the cylinder barrel, there is insufficient space to machine the support recess; because the central area of ​​the cylinder barrel has deep-holes in the cylinder wall, machining the support recess can easily cause the deep-holes to penetrate or the structure to deform, leading to cylinder barrel failure.

[0004] To address the issue of "no suitable mounting bracket location" in cylinder bore machining, existing technologies generally employ a process path of "machining the mounting bracket first - precision machining the stop and inner hole - then welding accessories in the mounting bracket area." This involves prioritizing welding accessories in other locations while avoiding the mounting bracket area, and then welding the accessories in the mounting bracket location after the cylinder inner hole and stop have been precision machined. However, this process has significant drawbacks: after the inner hole has been precision machined, the cylinder has reached its final precision. Welding in the mounting bracket area at this point can cause localized structural deformation due to high-temperature thermal stress, leading to out-of-tolerance roundness and dimensional deviations in the inner hole, directly reducing the cylinder's sealing performance and service life. Even if the deformed inner hole is repaired through honing, its processing efficiency is extremely low, and the repair accuracy is difficult to guarantee, failing to meet the cylinder repair needs of large-scale production and severely restricting production efficiency and product qualification rates.

[0005] Therefore, there is an urgent need to propose a tooling for machining cylinder barrels that can cooperate with the cylinder barrels to form a support. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a tooling for machining cylinder barrels, which solves the technical problem that there is no suitable position to machine the support recess when machining the stop of the cylinder barrel.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] This utility model provides a tooling for machining cylinder barrels. The tooling is used to cooperate with the cylinder barrel and a hydraulic center frame to machine the stop of the cylinder barrel. The tooling is characterized by: including an outer sleeve and a connecting member; one end of the outer sleeve is adapted to be sleeved on the stop end of the cylinder barrel, and the outer sleeve is coaxially arranged with the cylinder barrel; the outer sleeve is detachably connected to the stop end of the cylinder barrel through the connecting member; the outer sleeve is adapted to be clamped by the hydraulic center frame.

[0011] Optionally, a plurality of threaded holes are evenly provided on the circumferential side of one end of the outer sleeve; the connecting member is a bolt corresponding to each threaded hole; the bolt is threadedly connected to the threaded hole, and the end of the bolt is adapted to abut against the outer wall surface of the cylinder barrel's stop end.

[0012] Optionally, the outer sleeve includes two symmetrically arranged semicircular sleeves that can be enclosed to form a circular structure; the connecting part includes a screw and a nut, and each end of the two semicircular sleeves is provided with a connecting part, and the connecting part is provided with multiple coaxial through holes. The screw can pass through the through holes on the connecting part and be threadedly connected to the nut, so as to be suitable for the two semicircular sleeves to be fitted onto the outer wall surface of the stop end of the cylinder.

[0013] Optionally, the tooling also includes an elastic washer for fitting onto the stop end of the cylinder. The elastic washer is disposed on the inner wall of the outer sleeve and is adapted to abut against the stop end of the cylinder. Anti-slip patterns are provided on both sides of the elastic washer.

[0014] Optionally, the elastic washer is a polyurethane rubber washer with a thickness of 5mm-10mm.

[0015] Optionally, the inner wall of the outer sleeve is provided with an annular positioning inner step, which is adapted to fit against the stop end face of the cylinder, and the inner diameter of the positioning inner step is adapted to be larger than the inner diameter of the cylinder.

[0016] Optionally, the outer wall of the outer sleeve is also provided with an annular stop step, which is used to cooperate with the hydraulic center frame to form the clamping position of the hydraulic center frame.

[0017] Optionally, both the inner positioning step and the outer stop step are located in the middle of the outer sleeve, and the width values ​​of the inner positioning step and the outer stop step are the same.

[0018] Optionally, the length of the outer sleeve is 80mm-120mm, and the thickness of the outer sleeve is 50mm-100mm.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this utility model are as follows: The tooling for machining cylinder barrels in this utility model is detachably connected to the connecting piece via an outer sleeve, and the outer sleeve is coaxially fitted to the cylinder barrel stop end. The outer sleeve directly acts as a support socket for clamping by the hydraulic center support, eliminating the need to machine a support socket on the cylinder barrel body. This completely avoids the spatial conflicts caused by the dense attachments around the cylinder barrel, as well as the risk of deep hole penetration or deformation that can easily be caused by machining support sockets in the deep hole area of ​​the cylinder wall. It effectively solves the problem of "no suitable support socket" in the machining of cylinder barrel stops in the prior art.

[0021] This invention eliminates the need for machining brackets in the cylinder body, avoiding machining interference and structural damage caused by dense attachments and deep cylinder wall holes, thus ensuring the integrity of the cylinder. The detachable design adapts to various cylinder sizes, allowing for reuse to reduce costs. Easy disassembly after machining does not affect subsequent processes, completely avoiding the inner hole deformation caused by post-welding attachments in existing technologies, eliminating inefficient honing repairs, and significantly improving efficiency. The coaxial design ensures positioning accuracy, guarantees that the stop surface machining tolerances meet standards, improves the cylinder's sealing performance and lifespan, and the external sleeve can stably withstand clamping forces and vibrations, enhancing applicability in complex scenarios. Attached Figure Description

[0022] Figure 1 This is a front view of the tooling used for machining the cylinder barrel in Example 1;

[0023] Figure 2 for Figure 1 The diagram shows a sectional view of the tooling used for machining the cylinder barrel, taken along a vertical plane containing the cylinder barrel's axial direction.

[0024] Figure 3 for Figure 2 A partial schematic diagram of point A in the tooling used for machining the cylinder barrel is shown;

[0025] Figure 4 for Figure 1 A side view of the tooling used for machining the cylinder barrel is shown;

[0026] Figure 5 This is a side view of the tooling used for machining the cylinder barrel in Example 2;

[0027] Figure 6 This is a cross-sectional view of the vertical plane containing the cylinder axial direction in Example 3.

[0028] Explanation of reference numerals in the attached figures

[0029] 1: Cylinder; 2: Hydraulic center frame; 3: Outer sleeve; 31: Semicircular sleeve; 32: Positioning inner step; 33: Stop outer step; 4: Connecting piece; 41: Bolt piece; 5: Elastic washer ring. Detailed Implementation

[0030] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1:

[0032] Reference Figures 1 to 4 This embodiment proposes a tooling for machining cylinder 1, which mates with cylinder 1 to form a support recess, solving the problem that there is no suitable position on cylinder 1 to serve as a support recess. Specifically, the tooling for machining cylinder 1 in this embodiment includes an outer sleeve 3 and a connecting member 4, as detailed below.

[0033] In this embodiment, the tooling used for machining cylinder 1 is used in conjunction with cylinder 1 and hydraulic center support 2. It is particularly suitable for machining scenarios where the peripheral accessories of cylinder 1 are densely distributed and the cylinder 1 also has deep holes in the cylinder wall. This tooling solves the machining positioning problem by replacing the traditional support structure on the cylinder 1 body.

[0034] The outer sleeve 3 adopts a circular design with a symmetrical overall structure. One end of it can be smoothly fitted into the stop end of the cylinder 1. After being fitted, it maintains a coaxial state with the cylinder 1, providing a precise positioning reference for subsequent stop machining. The outer sleeve 3 restricts its axial movement through the connecting piece 4, avoiding relative sliding during machining and preventing damage to the outer circle of the cylinder 1 caused by rigid contact.

[0035] The connector 4 is used to detachably fix the outer sleeve 3 to the cylinder 1, adapting to different processing requirements. During assembly, the corresponding end of the outer sleeve 3 is fitted onto the stop end of the cylinder 1 and adjusted to be coaxial with the cylinder 1. A radial force is applied through the connector 4 to make the outer sleeve 3 and the cylinder 1 fit tightly together, forming a stable connection.

[0036] The outer sleeve 3 has a dedicated clamping position on its outer wall. The surface of the clamping position is flat and smooth, allowing it to stably abut against the hydraulic center frame 2. During machining, the hydraulic center frame 2 clamps the clamping position of the outer sleeve 3, and the rigid support of the outer sleeve 3 achieves stable positioning of the cylinder 1. Then, the machining equipment can be started to perform machining operations such as turning and grinding on the stop of the cylinder 1. After machining is completed, the connecting piece 4 is released, and the outer sleeve 3 can be easily removed from the stop end of the cylinder 1. The entire process is convenient and requires no additional processing of the cylinder 1.

[0037] In summary, the tooling is detachably connected to the connecting piece 4 via the outer sleeve 3, and the outer sleeve 3 is coaxially fitted to the end of the cylinder 1. The outer sleeve 3 directly serves as a support socket for the hydraulic center support 2 to clamp, eliminating the need to machine a support socket on the cylinder 1 body. This completely avoids spatial conflicts caused by the dense attachments around the cylinder 1, as well as the risk of deep hole penetration or deformation that can easily be caused by machining a support socket in the deep hole area of ​​the cylinder wall. It effectively solves the problem of "no suitable support socket" in the machining of the cylinder 1 end in the existing technology.

[0038] Furthermore, the tooling eliminates the need for machining brackets on the cylinder body 1, avoiding machining interference and structural damage caused by dense attachments and deep cylinder wall holes, thus ensuring the integrity of cylinder 1. The detachable design adapts to multiple cylinder 1 specifications, allowing for reuse to reduce costs. Easy disassembly after machining does not affect subsequent processes, completely avoiding inner hole deformation caused by post-welding attachments in existing technologies, eliminating inefficient honing repairs, and significantly improving efficiency. The coaxial design ensures positioning accuracy, guarantees that the stop surface machining tolerances meet standards, improves cylinder sealing performance and lifespan, and the external sleeve 3 can stably withstand clamping forces and vibrations, enhancing applicability in complex scenarios.

[0039] Furthermore, the outer sleeve 3 is used to fit one end of the cylinder 1's stop end, and multiple threaded holes are evenly arranged around its circumference. The axis of the threaded holes is aligned with the radial direction of the outer sleeve 3, and the threaded holes are through holes to ensure direct contact with the cylinder 1 during tightening. The multiple threaded holes are distributed at equal angles, so that the radial tightening force applied by the subsequent bolts 41 is evenly applied to the outer wall of the cylinder 1, preventing the outer sleeve 3 from skewing due to uneven force and ensuring coaxiality with the cylinder 1. The connecting piece 4 uses bolts 41 that are individually matched with the threaded holes, and by adjusting the length of the multiple bolts 41 screwed into the bolt holes, the outer sleeve 3 remains coaxial with the cylinder 1.

[0040] During assembly, first, fit the corresponding end of the outer sleeve 3 onto the stop end of the cylinder 1. Then, screw the bolts 41 one by one into the threaded holes, maintaining a uniform speed and force during tightening until the ends of the bolts 41 are tightly abutted against the outer wall of the stop end of the cylinder 1. By applying radial tightening force synchronously through the circumferentially evenly distributed bolts 41, and ensuring that the length of each bolt 41 is screwed in is consistent, the outer sleeve 3 and the cylinder 1 are rigidly fixed together, and the coaxiality is controlled within the range that meets the requirements of the stop machining.

[0041] After processing, loosen the bolts 41 one by one in diagonal order. The bolts 41 separate from the cylinder 1, and the outer sleeve 3 can be easily pulled out along the axial direction. The whole assembly and disassembly process is convenient and quick.

[0042] Furthermore, the tooling also includes an elastic washer 5, which, together with the outer sleeve 3 and the cylinder 1, forms an anti-slip positioning structure. The elastic washer 5 is ring-shaped, with its inner diameter precisely matching the outer diameter of the cylinder 1's stop end, and its outer diameter fitting snugly against the inner wall of the outer sleeve 3. After assembly, it completely fills the gap between the two, achieving a tight connection. The elastic washer 5 is made of polyurethane rubber with a thickness of 5mm-10mm and a Shore hardness controlled at 85-90A. It possesses both good elasticity and wear resistance, and can undergo moderate deformation under bolt tightening force, enhancing the fit.

[0043] The elastic washer 5 corresponds to one side of the positioning inner step 32 of the outer sleeve 3. Thus, the elastic washer 5 is clamped between the inner wall of the outer sleeve 3 and the outer wall of the cylinder barrel 1's stop end. Axial limiting is achieved through the positioning inner step 32, preventing the elastic washer 5 from moving axially during processing. To further strengthen the fixation, the outer circumference of the elastic washer 5 can be bonded to the inner wall of the outer sleeve 3. The adhesive layer thickness is controlled at 0.1-0.2mm to ensure a firm connection without affecting the overall fit accuracy.

[0044] Both ends of the elastic washer 5 are machined with anti-slip patterns. The patterns adopt a continuous wave-shaped or diamond-shaped grid design, with a depth of 0.5-0.8mm and a spacing of 2-3mm. Among them, the pattern on the side facing the cylinder 1 directly contacts the outer wall of the cylinder 1 stop end, increasing the static friction to prevent relative rotation between the outer sleeve 3 and the cylinder 1; the pattern on the side facing the outer sleeve 3 fits against the inner wall of the outer sleeve 3, improving the connection stability between the elastic washer 5 and the outer sleeve 3, and avoiding washer displacement caused by local stress.

[0045] During assembly, the elastic washer 5 is first bonded to the preset position on the inner wall of the outer sleeve 3 to ensure that it is aligned with the end face of the positioning inner step 32; then, the end of the outer sleeve 3 with the elastic washer 5 is inserted into the stop end of the cylinder 1, so that the inner wall of the elastic washer 5 is naturally in contact with the outer wall of the cylinder 1; finally, by tightening the bolts 41 around the outer sleeve 3, the elastic washer 5 is compressed and deformed under radial pressure, and abuts against the outer surface of the cylinder 1 to form a double anti-slip constraint.

[0046] This structural design not only compensates for minor dimensional deviations in the outer diameter of the cylinder 1 through elastic deformation, ensuring uniform fit, but also utilizes bidirectional anti-slip patterns to block the sliding path between the outer sleeve 3 and the cylinder 1, and between the elastic washer ring 5 and the outer sleeve 3. Simultaneously, the polyurethane rubber material isolates the rigid metal contact between the outer sleeve 3 and the cylinder 1, preventing indentations or scratches on the outer diameter of the cylinder 1 when the bolts are tightened, making it particularly suitable for cylinder 1 machining scenarios requiring high surface precision.

[0047] Furthermore, an annular positioning inner step 32 is integrally formed on the inner wall of the outer sleeve 3 near the end into which it fits into the cylinder 1. The positioning inner step 32 is coaxially arranged with the outer sleeve 3. During processing, the flatness of the end face is ensured to be ≤0.01mm and the perpendicularity of the step surface to the axis of the outer sleeve 3 is ≤0.01mm / m through turning process, ensuring the positioning accuracy when fitting together.

[0048] The inner diameter of the positioning inner step 32 is precisely matched with the outer diameter of the cylinder barrel 1 stop end, and the fitting clearance is controlled at 0.02-0.05mm. During the insertion process, it can guide the outer sleeve 3 to automatically center and initially limit radial offset.

[0049] During assembly, align one end of the outer sleeve 3 with the inner positioning step 32 with the stop end of the cylinder 1, and slowly slide it in axially until the step end face of the inner positioning step 32 is tightly fitted with the stop end face of the cylinder 1. At this time, the inner positioning step 32 forms an axial limit, preventing the outer sleeve 3 from moving excessively into the cylinder 1, and providing a reference for the subsequent tightening of the bolt 41.

[0050] After fitting, the step end face of the inner positioning step 32, in conjunction with the radial tightening force of the bolts 41 on the periphery of the outer sleeve 3, forms a dual constraint of "axial positioning + radial fixing". This structure ensures a high degree of coaxiality between the outer sleeve 3 and the cylinder 1, meeting the positioning accuracy requirements of the stop machining, while avoiding axial movement caused by machining vibration and improving the consistency of the stop dimensions.

[0051] The inner edge of the positioning inner step 32 is chamfered with a chamfer radius of 1-2mm. This prevents scratching the end face of the cylinder barrel 1 during insertion and guides the cylinder barrel 1 smoothly into the outer sleeve 3, simplifying the assembly operation. The surface of the step is polished to reduce friction and wear with the end face of the cylinder barrel 1 and extend the service life of the tooling.

[0052] Furthermore, the outer wall of the outer sleeve 3 is integrally formed with an annular stop step 33, which is coaxial with the outer sleeve 3 and serves as the clamping and limiting surface of the hydraulic center frame 2. The stop step 33 protrudes radially outward along the outer sleeve 3, forming a "flange-type" limiting structure, with its two end faces perpendicular to the axis of the outer sleeve 3. The step end face near the fitting end of the outer sleeve 3 is the main limiting surface, parallel to the hydraulic center frame 2, directly preventing the hydraulic center frame 2 from moving excessively towards the cylinder 1, preventing the hydraulic center frame 2 from sliding in the opposite direction due to vibration, and ensuring the effective clamping of the hydraulic center frame 2.

[0053] During assembly, after the outer sleeve 3 is fixed to the cylinder 1 via the connector 4, the outer step 33 of the stop is aligned with the machining datum of the cylinder 1's stop. When operating the hydraulic center frame 2, it moves along the outer wall of the outer sleeve 3 until it contacts the main limiting surface of the outer step 33. At this point, the hydraulic center frame 2 is in the preset clamping position, requiring no additional measurement or positioning. After activating the locking mechanism of the hydraulic center frame 2, it clamps the outer circumferential surface of the cylinder 1, and the outer step 33 of the stop prevents the hydraulic center frame 2 from axially moving, ensuring a stable clamping position.

[0054] During the machining process, the limiting effect of the outer step 33 of the stop minimizes the positional error of each clamping operation, ensuring the consistency of machining multiple batches of cylinder barrel 1. At the same time, the clearly defined clamping position prevents the hydraulic center frame 2 from being mistakenly clamped into the weak area of ​​the outer sleeve 3 or the position of the connecting part 4, preventing tooling deformation or connection failure, effectively resisting cutting vibration, and providing stable support for the machining of the cylinder barrel 1 stop.

[0055] Specifically, the width of the inner positioning step 32 is the same as the width of the outer stop step 33, both ranging from 5mm to 10mm. This satisfies the effective contact area requirement between the inner positioning step 32 and the end face of the cylinder 1 stop, ensuring axial positioning stability. It also ensures the stopping effect of the outer stop step 33 and the hydraulic center frame 2, guaranteeing a proper clamping position for the hydraulic center frame 2. This symmetrical design with consistent width simplifies the machining process of the outer sleeve 3, eliminating the need for separate adjustments to the axial dimensions of different steps, thus improving production efficiency. Simultaneously, it ensures the fitting accuracy between the outer sleeve 3 and the cylinder 1 and hydraulic center frame 2, further optimizing the positioning stability of the stop machining.

[0056] Specifically, the length direction of the outer sleeve 3 is along the axial direction of the cylinder 1, the length of the outer sleeve 3 is 80mm-120mm, and the thickness of the outer sleeve 3 is 50mm-100mm.

[0057] Example 2:

[0058] Reference Figure 5 The difference between this embodiment and embodiment 1 is that the outer sleeve 3 in this embodiment includes two symmetrically arranged semi-circular sleeves 31, as detailed below.

[0059] In this embodiment, the two semicircular sleeves 31 can form a complete annular structure after being joined together. The inner diameter of the sleeve is adapted to the outer wall surface of the cylinder barrel 1 stop end. After being joined together, the sleeves can fit tightly against the outer circumference of the cylinder barrel 1, ensuring the coaxiality after assembly.

[0060] Each semicircular sleeve 31 has an integrally formed connecting part at both ends. The connecting part is flat and protrudes outward along the radial direction of the semicircular sleeve 31. The connecting parts at corresponding ends of the two semicircular sleeves 31 can be completely overlapped after mating. Multiple through holes are provided on the connecting part. The axis of the through holes is perpendicular to the radial direction of the semicircular sleeve 31, and the through holes on the corresponding connecting parts of the two semicircular sleeves 31 are completely coaxial, ensuring that the screw can smoothly pass through the connecting parts on both sides.

[0061] The connector 4 includes a high-strength screw and a matching nut. The screw material is adapted to the stress requirements of the machining conditions, and the nut is a lock-lock nut to prevent loosening caused by machining vibration. During assembly, the two semi-circular sleeves 31 are respectively fastened to the outer wall of the stop end from both sides of the cylinder 1, so that the inner wall of the semi-circular sleeves 31 fits against the outer circumference of the cylinder 1, and the through holes of the connecting parts at both ends are aligned. Then, the screw is passed through the through holes of the connecting parts on both sides in sequence, and the nuts are tightened at both ends of the screw. The axial locking force is applied by the thread engagement between the nuts and the screw, which causes the two semi-circular sleeves 31 to contract radially, tightly hugging the outer wall of the stop end of the cylinder 1, forming a stable and reliable fixation.

[0062] During processing, the symmetrically distributed connecting parts and screw and nut structure can evenly distribute the clamping force, avoiding excessive local stress on the cylinder 1, while ensuring the coaxiality of the outer sleeve 3 and the cylinder 1. After processing, the nut is loosened and the screw is removed, and the two semi-circular sleeves 31 can be separated and removed from both sides of the cylinder 1. The assembly and disassembly are convenient and do not cause any damage to the outer surface of the cylinder 1.

[0063] The remaining parts that are the same as in Example 1 will not be repeated here.

[0064] Example 3:

[0065] To address the problem of "no suitable location for machining the support bracket" in the machining of the cylinder barrel 1 stop, this embodiment provides an improved method in terms of pure process flow, which differs from the physical tooling methods of embodiments 1-2 described above. (Refer to...) Figure 6 This embodiment addresses the problem of "no suitable location for machining the support socket" in the machining of the cylinder barrel 1 stop. It provides a method for machining the cylinder barrel, specifically abandoning the traditional external tooling-assisted positioning method. By extending the length of the cylinder barrel 1 blank to reserve space for the support socket machining, the excess part is cut off after the cylinder barrel 1 stop is machined, achieving efficient positioning while simplifying the machining process.

[0066] Before machining cylinder barrel 1, the first blank material with a length greater than that of the conventionally machined blank material is selected as the blank material. The length of the first blank material is 90mm-150mm longer than the blank material required for the normal finished cylinder barrel 1 of the same specification. The extended part is specially used for machining the positioning bracket socket to avoid occupying the space of the finished section of cylinder barrel 1.

[0067] The core problem of "no suitable location for machining the mounting bracket" lies in the dense arrangement of various accessories around the periphery of the cylinder barrel 1's stop end, and the cylinder barrel 1 also has deep holes machined in the cylinder wall. Machining the mounting bracket directly near the stop end is prone to interference with the existing structure, and may even lead to damage to the deep holes or failure of the accessory mounting positions. Based on this, the location for machining the mounting bracket is selected in the extension section of the first blank, that is, the redundant part on the outer side of the cylinder barrel 1's stop end. This area is far away from the densely packed accessory area and the deep holes in the cylinder wall, and has sufficient machining space.

[0068] During processing, the support recess is first machined according to the design dimensions on the extended section of the first blank. The hydraulic center support 2 clamps the support recess to achieve precise positioning of the cylinder 1, ensuring the coaxiality and dimensional accuracy of the subsequent stop machining. After the stop machining of the cylinder 1 is completed and all accuracy indicators meet the standards, the excess part of the extended section is cut off along the design length reference of the finished cylinder 1 using flame cutting or mechanical cutting, leaving only the finished structure of the cylinder 1.

[0069] The entire process requires no additional external positioning fixtures. The selection of the extended raw material and the removal of excess parts are both mature processing procedures, making the operation simple and quick. Machining the bracket recess on the redundant section avoids interference with the functional structure of cylinder 1. After removal, the end face of cylinder 1 is flat, requiring no secondary repair, effectively improving processing efficiency and the yield rate of finished products.

[0070] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0072] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tooling for machining a cylinder barrel, the tooling being used to cooperate with the cylinder barrel (1) and a hydraulic center support (2) to machine the stop of the cylinder barrel (1), characterized in that: Includes an outer sleeve (3) and a connector (4); One end of the outer sleeve (3) is adapted to be sleeved on the stop end of the cylinder (1), and the outer sleeve (3) and the cylinder (1) are coaxially arranged; The outer sleeve (3) is detachably connected to the stop end of the cylinder (1) via the connector (4); the outer sleeve (3) is adapted to be clamped by the hydraulic center frame (2).

2. The tooling for machining cylinder barrels as described in claim 1, characterized in that: Multiple threaded holes are evenly provided on the circumferential side of one end of the outer sleeve (3); The connecting member (4) is a bolt (41) that corresponds one-to-one with the threaded hole; The bolt (41) is threadedly connected to the threaded hole, and the end of the bolt (41) is adapted to abut against the outer wall surface of the stop end of the cylinder (1).

3. The tooling for machining cylinder barrels as described in claim 1, characterized in that: The outer sleeve (3) includes two symmetrically arranged semicircular sleeves (31), which can be enclosed to form a circular ring structure; The connector (4) includes a screw and a nut. Both ends of the two semicircular sleeves (31) are provided with connecting parts, and the connecting parts are provided with multiple coaxial through holes. The screw can pass through the through holes on the connecting parts and be threaded to the nut, so that the two semicircular sleeves (31) can be fitted onto the outer wall surface of the stop end of the cylinder (1).

4. The tooling for machining cylinder barrels as described in claim 1, characterized in that: The tooling also includes an elastic washer (5) for fitting onto the stop end of the cylinder (1). The elastic washer (5) is disposed on the inner wall of the outer sleeve (3). The elastic washer (5) is adapted to abut against the stop end of the cylinder (1). Anti-slip patterns are provided on both sides of the elastic washer (5).

5. The tooling for machining cylinder barrels as described in claim 4, characterized in that: The elastic gasket (5) is a polyurethane rubber gasket, and the thickness of the elastic gasket (5) is 5mm-10mm.

6. The tooling for machining cylinder barrels as described in claim 1, characterized in that: The inner wall of the outer sleeve (3) is provided with an annular positioning inner step (32), the positioning inner step (32) is adapted to fit against the stop end face of the cylinder (1), and the inner diameter of the positioning inner step (32) is adapted to be larger than the inner diameter of the cylinder (1).

7. The tooling for machining cylinder barrels as described in claim 6, characterized in that: The outer wall of the outer sleeve (3) is also provided with an annular stop step (33), which is used to cooperate with the hydraulic center frame (2) to form the clamping position of the hydraulic center frame (2).

8. The tooling for machining cylinder barrels as described in claim 7, characterized in that: The positioning inner step (32) and the stop outer step (33) are both located in the middle of the outer sleeve (3), and the width values ​​of the positioning inner step (32) and the stop outer step (33) are the same.

9. The tooling for machining cylinder barrels as described in claim 1, characterized in that: The length of the outer sleeve (3) is 80mm-120mm, and the thickness of the outer sleeve (3) is 50mm-100mm.

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