Large thin-walled fixed-distance ring processing tool

Abstract

The utility model relates to a kind of large thin-walled fixed-distance ring machining tool, including the circular tool plate for hoisting fixed-distance ring, circular tool plate central axis is horizontally arranged, fixed-distance ring is coaxially arranged outside circular tool plate, and it is detachably connected with circular tool plate by several screws, several process thread holes matched with process hole are evenly opened on the outside end face of circular tool plate along circumferential direction, process thread hole and screw are one-to-one correspondence, each screw is threadedly connected in the process thread hole of corresponding circular tool plate after passing through the process hole of corresponding position on fixed-distance ring;The machining tool of the utility model fixes large thin-walled fixed-distance ring on circular tool plate in the mode of hoisting, utilizes the process hole of fixed-distance ring itself, cooperates screw evenly distributed in the circumferential direction of fixed-distance ring, fastens fixed-distance ring on circular tool plate, can effectively prevent fixed-distance ring from deformation, realizes fixed-distance ring stable clamping.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and in particular to a machining fixture for large thin-walled fixed-distance rings. Background Technology

[0002] The stern shaft sealing device is a crucial component for ensuring the tightness of the stern shaft lubrication system and preventing seawater from entering the stern tube. It is a core component for ensuring safe navigation. During navigation, the stainless steel bushing rotating with the stern shaft propeller constantly rubs against the sealing surface of the sealing device's seal. Over time, both the seal and the bushing surface wear down, and grooves gradually form on the stainless steel bushing surface. Therefore, for vessels undergoing special inspections, after the stern shaft is disassembled and inspected, the seal is generally replaced. The worn stainless steel bushing typically needs to be machined or polished on a lathe to remove wear marks, or the bushing surface can be repaired with a paint coating, or the entire bushing can be replaced. For vessels undergoing routine annual inspections, without disassembling the propeller, the seal is usually bonded in place, a half-type spacer ring is added or removed, and the entire sealing device is repositioned. This allows the bonded new seal to be moved a safe distance away from the worn grooves of the old seal, thereby extending the service life of the stainless steel bushing, ensuring sealing quality, shortening the cycle time, and saving costs.

[0003] To ensure the tightness and quality of the seals after installation, high requirements are placed on the parallelism, flatness, concentricity, fit tolerances of the centering groove and shoulder, and accuracy of the lap end face of the half-type spacer ring flange. However, due to the large size and thin thickness of the half-type spacer ring, the clamping force of the conventional clamping fixtures used in the machining process can easily cause deformation of the spacer ring, affecting the machining accuracy.

[0004] Therefore, this utility model proposes a machining fixture for large thin-walled fixed-distance rings to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a machining fixture for large thin-walled fixed-distance rings, so as to achieve stable clamping of the fixed-distance rings and effectively prevent deformation of the fixed-distance rings.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a large thin-walled fixed-distance ring processing fixture, wherein a plurality of process holes are uniformly opened on the end face of the fixed-distance ring along the circumferential direction. The innovation is that the processing fixture includes a circular fixture plate for hoisting the fixed-distance ring. The central axis of the circular fixture plate is set horizontally. The fixed-distance ring is coaxially set on the outside of the circular fixture plate and is detachably connected to the circular fixture plate by a plurality of screws. A plurality of process thread holes matching the process holes are uniformly opened on the outer end face of the circular fixture plate along the circumferential direction. The process thread holes correspond one-to-one with the screws. Each screw passes through the corresponding process hole on the fixed-distance ring and is threaded into the corresponding process thread hole in the circular fixture plate.

[0007] Furthermore, the machining fixture also includes a clamping mechanism for fixing the circular fixture plate, the clamping mechanism including a base, a backing, a C-shaped clamp, a tightening bolt, and a clamping plate; The backrest is set above the base and installed on the top surface of the base through the first connector. The backrest has a reference surface that is perpendicular to the top surface of the base. The reference surface of the backrest has a positioning post with the central axis horizontally set. A positioning hole matching the positioning post is opened on the circular tooling plate. The inner end face of the circular tooling plate is in contact with the reference surface, and the positioning post is inserted into the positioning hole. The C-shaped clamp is movably clamped on the top of the support and cooperates with the reference surface of the support to form a groove for clamping the circular tooling plate. The C-shaped clamp is connected to the support by a first fastening bolt. The first fastening bolt is located on the side of the support away from the reference surface. The C-shaped clamp has a first threaded hole that matches the first fastening bolt. The first fastening bolt is threaded into the first threaded hole, and the end of the first fastening bolt abuts against the support. The tightening bolt is located below the C-shaped clamp and is positioned on the side of the backing plate closest to the reference surface. It is connected to the backing plate via a second connector. The tightening bolt is threaded onto the second connector, and the end of the tightening bolt is vertically pressed against the outer end face of the circular tooling plate. The clamping plate is located below the C-shaped clamp and on the side of the C-shaped clamp away from the tightening bolt. A first fixing block is provided on the top surface of the base. One side of the clamping plate is threadedly connected to the first fixing block by an adjusting bolt, and the other side presses against the outer end face of the circular tooling plate.

[0008] Furthermore, the support includes a base plate, a reference plate, and a rib plate. The base plate is horizontally set on the top surface of the base, and the reference plate is vertically welded to the top surface of the base plate and cooperates with the base plate to form an L-shaped structure. One end face of the reference plate is the reference surface. The rib plate is set on the side of the reference plate away from the reference surface. The rib plate is set perpendicular to the base plate and perpendicular to the reference plate. The two sides of the rib plate are welded to the base plate and the reference plate respectively.

[0009] Furthermore, the first connecting member includes a second fixing block and a pressure plate. The second fixing block is placed on the top surface of the base, and one side of the pressure plate is disposed on the top of the second fixing block, while the other side is pressed onto the top surface of the base plate. The pressure plate and the second fixing block are movably mounted on the base by T-bolts.

[0010] Furthermore, the second connecting member includes an L-shaped rod and a threaded sleeve. One side of the L-shaped rod has an external thread, and a second threaded hole matching the external thread is opened on the reference plate. The L-shaped rod is threaded into the second threaded hole and is relatively fixed to the reference plate by a fastening nut. The threaded sleeve is welded to the end of the L-shaped rod away from the reference plate, and the tightening bolt is threaded into the threaded sleeve.

[0011] Furthermore, the clamp plate has a waist-shaped hole, and the adjusting bolt is movably inserted into the waist-shaped hole.

[0012] The advantages of this utility model are: The processing fixture of this utility model uses a hoisting method to fix a large thin-walled spacer ring on a circular fixture plate. By utilizing the process holes on the spacer ring and the screws evenly distributed in the circumferential direction of the spacer ring, the spacer ring is fastened to the circular fixture plate, which can effectively prevent the spacer ring from deforming and achieve stable clamping of the spacer ring.

[0013] The clamping mechanism of this utility model uses the reference surface of the mountain as a reference. It uses C-shaped clamps, tightening bolts and clamping plates to cooperate with each other. It is adjusted and locked by thread adjustment, forming three stable fixing points distributed in a triangle on the circular tooling plate. The circular tooling plate is tightly attached to the reference surface of the mountain, which can effectively avoid the problem of tool vibration when machining large thin-walled fixed distance rings, improve the machining quality and efficiency of fixed distance rings, and effectively control tool consumption costs.

[0014] The backing of this utility model is composed of a base plate, a reference plate and ribs, which has a simple structure, high stability and is convenient for C-shaped clamps and tightening bolts to install.

[0015] The support of this utility model is movably connected to the base through a second fixing block, a pressure plate, and T-bolts, which facilitates the relocation of the support to match the installation of the circular tooling plate.

[0016] The L-shaped rod of the second connecting member of this utility model is threadedly connected to the reference plate. By rotating the L-shaped rod, the position of the tightening bolt at the pressing point of the circular tooling plate can be adjusted. After the adjustment is in place, tighten the fastening nut to fix the L-shaped rod and prevent the tightening bolt from deflecting.

[0017] This invention allows for height adjustment of the clamping plate by opening an oblong hole in the clamping plate and changing the relative position of the adjusting bolt within the oblong hole, thus adapting to the clamping requirements of circular tooling plates. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the large thin-walled fixed-distance ring of this utility model.

[0020] Figure 2 This is a schematic diagram of the machining fixture for the large thin-walled fixed-distance ring of this utility model.

[0021] Figure 3 This is a schematic diagram of the circular tooling plate of this utility model.

[0022] Figure 4 This is a cross-sectional view of the clamping mechanism of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the second connector of the present invention. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0025] Example This embodiment provides a machining fixture for large thin-walled fixed-distance rings, such as... Figure 1 As shown, several process holes 701 are uniformly opened along the circumferential direction on the end face of the spacer ring 7.

[0026] like Figure 2-5 As shown, the machining fixture includes a circular fixture plate 6 for hoisting the spacer ring 7 and a clamping mechanism for fixing the circular fixture plate 6.

[0027] The central axis of the circular tooling plate 6 is set horizontally, and the spacer ring 7 is coaxially set on the outside of the circular tooling plate 6 and is detachably connected to the circular tooling plate 6 by a number of screws. A number of process thread holes 601 that match the process holes 701 are evenly opened on the outer end face of the circular tooling plate 6 in the circumferential direction. The process thread holes 601 correspond one-to-one with the screws. Each screw passes through the process hole 701 at the corresponding position on the spacer ring 7 and is threaded into the corresponding process thread hole 601 of the circular tooling plate 6.

[0028] The clamping mechanism includes a base 1, a backrest 5, a C-shaped clamp 2, a tightening bolt 3, and a clamping plate 4.

[0029] The base 1 is horizontally positioned, and the top surface of the base 1 has several T-shaped guide rail grooves 101 arranged in parallel.

[0030] The support plate 5 is positioned above the base 1 and is mounted on the top surface of the base 1 via a first connector. The support plate 5 has a reference surface A that is perpendicular to the top surface of the base 1. In this embodiment, the support plate 5 includes a base plate 502, a reference plate 501, and a rib plate 503. The base plate 502 is horizontally positioned on the top surface of the base 1. The reference plate 501 is vertically welded to the top surface of the base plate 502 and forms an L-shaped structure with the base plate 502. One end face of the reference plate 501 is the reference surface A. The rib plate 503 is positioned on the side of the reference plate 501 away from the reference surface A. The rib plate 503 is perpendicular to both the base plate 502 and the reference plate 501. Both sides of the rib plate 503 are welded to the base plate 502 and the reference plate 501, respectively.

[0031] Two first connecting members are respectively disposed on both sides of the base plate 502. The first connecting member includes a second fixing block 504 and a pressure plate 505. The second fixing block 504 is placed on the top surface of the base 1. One side of the pressure plate 505 is disposed on the top surface of the second fixing block 504, and the other side is pressed against the top surface of the base plate 502. The pressure plate 505 and the second fixing block 504 are movably mounted on the base 1 by means of a T-bolt 506. One side of the T-bolt 506 is slidably installed in the T-shaped guide groove 101 of the base 1, and the other side passes upward through the second fixing block 504 and the pressure plate 505 in sequence and is threadedly connected to a matching first nut 507. By tightening the first nut 507, the pressure plate 505 is pressed tightly against the base plate 502, thereby fixing the backrest 5 to the base 1.

[0032] The reference surface A of the mountain 5 has a positioning post 508 with its central axis horizontally set. The circular tooling plate 6 has a positioning hole 602 that matches the positioning post 508. The inner end face of the circular tooling plate 6 is in contact with the reference surface A, and the positioning post 508 passes through the positioning hole 602.

[0033] C-shaped clamp 2 is movably clamped on the top of the reference plate 501 of the backing 5, and cooperates with the reference surface A of the backing 5 to form a clamping groove for clamping the circular tooling plate. C-shaped clamp 2 is connected to the reference plate 501 of the backing 5 by a first fastening bolt 201. The first fastening bolt 201 is located on the side of the reference plate 501 away from the reference surface A. The C-shaped clamp 2 has a first threaded hole that matches the first fastening bolt 201. The first fastening bolt 201 is threaded into the first threaded hole. The end of the first fastening bolt 201 abuts against the side wall of the reference plate 501 away from the reference surface A. By rotating the first fastening bolt 201, the size of the clamping groove is adjusted so that the circular tooling plate can be clamped smoothly.

[0034] The tightening bolt 3 is located below the C-shaped clamp 2 and is positioned on the side of the support 5 closest to the reference surface A. It is connected to the reference plate 501 of the support 5 via a second connector. The tightening bolt 3 is threaded onto the second connector, and its central axis is perpendicular to the reference surface A. The second connector includes an L-shaped rod 301 and a threaded sleeve 302. One side of the L-shaped rod 301 has an external thread. The reference plate 501 has a second threaded hole that matches the external thread. The L-shaped rod 301 is threaded into the second threaded hole and is fixed relative to the reference plate 501 by two fastening nuts 303. The two fastening nuts 303 are respectively located on both sides of the reference plate 501. The threaded sleeve 302 is welded to the end of the L-shaped rod 301 away from the reference plate 501. The tightening bolt 3 is threaded into the threaded sleeve 302, and its end is vertically pressed against the outer end face of the circular tooling plate 6. By loosening the two fastening nuts 303 and rotating the L-shaped rod, the position of the top bolt 3 at the fixed point of the circular tooling plate 6 can be adjusted. After the adjustment is in place, tighten the fastening nuts 303 to fix the second connecting piece relative to the reference plate 501 and prevent the top bolt 3 from deflecting.

[0035] The clamping plate 4 is positioned below the C-shaped clamp 2 and on the side of the C-shaped clamp 2 furthest from the tightening bolt 3. A first fixing block 402 is provided on the top surface of the base 1. The connection method between the first fixing block 402 and the base 1 is the same as the connection method between the first connecting piece and the base 1. The clamping plate 4 is vertically positioned on the side of the backrest 5 near the reference surface A. One side of the clamping plate 4 is threadedly connected to the first fixing block 402 via an adjusting bolt 401, and the other side presses against the outer end face of the circular tooling plate. The clamping plate 4 has an oblong hole 403, and the side wall of the first fixing block 402 has a third threaded hole. The adjusting bolt 401 is movably inserted into the oblong hole 403 and threadedly connected into the third threaded hole.

[0036] When using the machining fixture, suspend the circular fixture plate 6 on the positioning column, hoist the spacer ring to the circular fixture plate 6, manually rotate the circular fixture plate 6 so that the process thread hole 601 of the circular fixture plate 6 is aligned with the process hole 701 of the spacer ring 7, install the screws to fix the spacer ring 7 on the circular fixture plate 6, and then tighten the first fastening bolt 201, the top tightening bolt 3 and the adjusting bolt 401 of the clamping plate 4 of the C-shaped clamp 2 to firmly clamp and fix the circular fixture plate 6 on the reference surface A of the backing 5, thus completing the spacer ring fixing.

[0037] The machining fixture uses a hoisting method to fix the large thin-walled spacer ring onto a circular fixture plate. Utilizing the process holes on the spacer ring and screws evenly distributed in the circumferential direction of the spacer ring, the spacer ring is fastened to the circular fixture plate, which can effectively prevent deformation of the spacer ring and achieve stable clamping of the spacer ring.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A machining fixture for a large thin-walled spacer ring, wherein a plurality of process holes are uniformly formed along the circumferential direction on the end face of the spacer ring, characterized in that: The machining fixture includes a circular fixture plate for hoisting the spacer ring. The central axis of the circular fixture plate is horizontally set, and the spacer ring is coaxially set on the outside of the circular fixture plate and is detachably connected to the circular fixture plate by a number of screws. A number of process thread holes matching the process holes are evenly opened on the outer end face of the circular fixture plate along the circumferential direction. The process thread holes correspond one-to-one with the screws. Each screw passes through the corresponding process hole on the spacer ring and is threaded into the corresponding process thread hole in the circular fixture plate.

2. The machining fixture for large thin-walled fixed-distance rings according to claim 1, characterized in that: The machining fixture also includes a clamping mechanism for fixing the circular fixture plate. The clamping mechanism includes a base, a backrest, a C-shaped clamp, a tightening bolt, and a clamping plate. The backrest is set above the base and installed on the top surface of the base through the first connector. The backrest has a reference surface that is perpendicular to the top surface of the base. The reference surface of the backrest has a positioning post with the central axis horizontally set. A positioning hole matching the positioning post is opened on the circular tooling plate. The inner end face of the circular tooling plate is in contact with the reference surface, and the positioning post is inserted into the positioning hole. The C-shaped clamp is movably clamped on the top of the support and cooperates with the reference surface of the support to form a groove for clamping the circular tooling plate. The C-shaped clamp is connected to the support by a first fastening bolt. The first fastening bolt is located on the side of the support away from the reference surface. The C-shaped clamp has a first threaded hole that matches the first fastening bolt. The first fastening bolt is threaded into the first threaded hole, and the end of the first fastening bolt abuts against the support. The tightening bolt is located below the C-shaped clamp and is positioned on the side of the backing plate closest to the reference surface. It is connected to the backing plate via a second connector. The tightening bolt is threaded onto the second connector, and the end of the tightening bolt is vertically pressed against the outer end face of the circular tooling plate. The clamping plate is located below the C-shaped clamp and on the side of the C-shaped clamp away from the tightening bolt. A first fixing block is provided on the top surface of the base. One side of the clamping plate is threadedly connected to the first fixing block by an adjusting bolt, and the other side presses against the outer end face of the circular tooling plate.

3. The machining fixture for large thin-walled fixed-distance rings according to claim 2, characterized in that: The support includes a base plate, a reference plate, and ribs. The base plate is horizontally set on the top surface of the base. The reference plate is vertically welded to the top surface of the base plate and forms an L-shaped structure with the base plate. One end face of the reference plate is the reference surface. The ribs are set on the side of the reference plate away from the reference surface. The ribs are perpendicular to the base plate and the reference plate. The two sides of the ribs are welded to the base plate and the reference plate, respectively.

4. The machining fixture for large thin-walled fixed-distance rings according to claim 3, characterized in that: The first connecting member includes a second fixing block and a pressure plate. The second fixing block is placed on the top surface of the base. One side of the pressure plate is located on top of the second fixing block, and the other side is pressed onto the top surface of the base plate. The pressure plate and the second fixing block are movably installed on the base by T-bolts.

5. The machining fixture for large thin-walled fixed-distance rings according to claim 3, characterized in that: The second connector includes an L-shaped rod and a threaded sleeve. The L-shaped rod has an external thread on one side, and a second threaded hole matching the external thread is opened on the reference plate. The L-shaped rod is threaded into the second threaded hole and is relatively fixed to the reference plate by a fastening nut. The threaded sleeve is welded to the end of the L-shaped rod away from the reference plate, and the tightening bolt is threaded into the threaded sleeve.

6. The machining fixture for large thin-walled fixed-distance rings according to claim 2, characterized in that: The clamp plate has a waist-shaped hole, and the adjusting bolt is movably inserted into the waist-shaped hole.

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