High-precision processing tool clamp for marine diesel engine cylinder liner

Abstract

This invention provides a high-precision machining fixture for marine diesel engine cylinder liners, comprising an upper fixture, a lower fixture, and a connecting screw. The upper fixture is a single piece with screw holes at both ends. The lower fixture consists of two separate fixtures fixed to a base, each with a screw hole at its top that aligns with the screw holes in the upper fixture. The connecting screw can be positioned between the upper and lower fixtures. One side of each lower fixture is inclined, and a detachable support assembly is mounted on this inclined surface. The marine engine cylinder liner to be machined is placed on the support assembly of the lower fixture, and the upper and lower fixtures are connected by the connecting screw, effectively preventing displacement of the cylinder liner during machining. For cylinder liners of different specifications, only the upper fixture needs to be replaced; the specifications of the support assembly can be adjusted to accommodate different cylinder liner sizes, thus improving machining efficiency.

Description

Technical Field

[0001] This utility model relates to the field of marine diesel engine cylinder liner processing technology, and in particular to a high-precision marine diesel engine cylinder liner processing tooling fixture. Background Technology

[0002] In marine propulsion systems, marine engines are core components, and their performance and reliability directly affect the ship's operational efficiency and safety. Cylinder liners, as a critical component of marine engines, play a vital role in the engine's power output, fuel economy, and service life.

[0003] With the development of the shipbuilding industry, the performance requirements for marine engines are increasing, necessitating higher precision, wear resistance, and sealing performance for cylinder liners. The machining quality of cylinder liners largely depends on the tooling fixtures. Traditional cylinder liner machining tooling fixtures have several drawbacks: positioning accuracy is insufficient to meet increasingly stringent dimensional tolerance requirements; displacement easily occurs during machining, leading to deviations in cylinder liner geometric accuracy; the clamping method is not ideal, failing to apply force evenly, easily causing cylinder liner deformation and affecting its cylindricity and roundness; furthermore, traditional tooling fixtures have poor versatility, requiring frequent fixture changes for different cylinder liner specifications, reducing machining efficiency and increasing production costs. Utility Model Content

[0004] To address the aforementioned technical problems, this invention provides a high-precision machining fixture for marine diesel engine cylinder liners, aiming to solve technical issues such as unstable tooling positioning and insufficient clamping accuracy in existing machining processes. Through innovative structural design, it improves the efficiency and quality of cylinder liner machining. The technical means employed in this invention are as follows:

[0005] A high-precision machining fixture for marine diesel engine cylinder liners includes an upper fixture, a lower fixture, and a connecting screw. The upper fixture is an integral piece with screw holes at both its left and right ends. The lower fixture consists of two separate fixtures fixed to a base. Each of the two lower fixtures has a screw hole at its top that matches the position of the screw hole in the upper fixture. The connecting screw can be placed between the upper and lower fixtures. One side of each of the two lower fixtures is an inclined surface, on which a detachable support assembly is provided.

[0006] Furthermore, the upper clamp includes a bolted connection part, an inclined part, and a horizontal connection part. Both bolted connection parts are horizontally arranged, and there is one horizontal connection part that is also horizontally arranged. There is a preset height difference between the horizontal connection part and the bolted connection part. The left and right inclined parts are used to connect the bolted connection part and the horizontal connection part on that side, respectively.

[0007] Furthermore, the support component is a positioning plate, and the positioning plate has a screw hole on the side near the inclined surface. The inclined surface also has a screw hole, and the lower clamp has a mounting hole for the screw and nut to pass through.

[0008] This invention has the following advantages: The marine engine cylinder liner to be processed is placed on the support assembly of the lower clamp, and the upper and lower clamps are connected by a connecting screw, which effectively prevents the cylinder liner from shifting during processing; the upper clamp with a regular structure and two symmetrically arranged lower clamps effectively clamp the cylinder liner while dispersing the pressure on it, preventing deformation during processing; for cylinder liners of different specifications, only the upper clamp needs to be replaced, and the clamping of cylinder liners of different specifications can be met by adjusting the specifications of the support assembly, thus improving processing efficiency. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the structure of this utility model installed in the cylinder liner of a diesel engine.

[0012] In the diagram: 1. Upper clamp; 2. Base; 3. Lower clamp; 4. Support assembly; 5. Connecting screw; 6. Nut; 7. Mounting hole. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] like Figure 1 , Figure 2As shown in the figure, this utility model embodiment discloses a high-precision marine diesel engine cylinder liner machining tooling fixture, including an upper fixture 1, a lower fixture 3 and a connecting screw 5. The upper fixture is an integral piece with screw holes at both its left and right ends. The lower fixture consists of two separate fixtures fixed on a base 2. Each of the two lower fixtures has a screw hole at its top that matches the position of the screw hole in the upper fixture. The connecting screw can be placed between the upper fixture and the lower fixture. The opposite side of the two lower fixtures is an inclined surface, and a detachable support assembly 4 is provided on the inclined surface.

[0015] Furthermore, the upper clamp includes a bolted connection part, an inclined part, and a horizontal connection part. Both bolted connection parts are horizontally arranged, and there is one horizontal connection part that is also horizontally arranged. There is a preset height difference between the horizontal connection part and the bolted connection part. The left and right inclined parts are used to connect the bolted connection part and the horizontal connection part on that side, respectively.

[0016] After determining the screw insertion position, the screw position is limited by the nut 6 set above the bolt connection. As an optional implementation, a nut can also be set below the bolt connection before the screw is installed, and a more stable locking can be achieved by the cooperation of the two nuts.

[0017] Furthermore, the support component is a positioning plate, and the positioning plate has a screw hole on the side near the inclined surface. The inclined surface also has a screw hole, and the lower clamp has a mounting hole 7 for the passage of a screw and a nut.

[0018] As an extended implementation, the bottom of the cylinder liner is provided with a cylinder liner positioning reference hole, and the support component is a positioning pin structure. The high-precision positioning pin cooperates with the cylinder liner positioning reference hole to ensure the accurate circumferential and axial positioning of the cylinder liner in the fixture, effectively restricting the cylinder liner's degree of freedom, reducing displacement deviation during the machining process, and ensuring the cylinder liner's dimensional accuracy and geometric tolerances.

[0019] The functional modules of this invention can be quickly disassembled and assembled. Furthermore, adjustable components allow for fine-tuning to accommodate marine engine cylinder liners of different sizes, improving the versatility of the fixture and reducing changeover time and costs.

[0020] Specifically, during use, the base of the tooling fixture is installed on the machine tool worktable, and high-precision measuring instruments are used to ensure the levelness and positional accuracy of the base installation, with the error controlled within ±0.02mm.

[0021] Precise alignment is achieved between the support components and the machine tool's coordinate system. The position of each support component can be finely adjusted using fine-tuning bolts, followed by tightening the fixing nuts to ensure that the support components do not shift during machining. The surface roughness of the support components must be below Ra 0.8 μm.

[0022] Install the upper clamp by selecting an upper clamp of the appropriate specifications and model. After installation, fix the upper clamp and lower clamp in place using screws.

[0023] like Figure 2 As shown, depending on the specifications of the marine diesel engine cylinder liners, multiple clamps can be set up to clamp different positions of different cylinder liners.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-precision marine diesel engine cylinder liner processing tooling fixture, characterized in that, The device includes an upper clamp, a lower clamp, and a connecting screw. The upper clamp is a single piece with screw holes at both its left and right ends. The lower clamp consists of two separate clamps fixed to the base. Each of the two lower clamps has a screw hole at its top that matches the position of the screw hole in the upper clamp. The connecting screw can be placed between the upper and lower clamps. The opposite side of the two lower clamps is an inclined surface, on which a detachable support assembly is provided.

2. The high-precision marine diesel engine cylinder liner processing tooling fixture according to claim 1, characterized in that, The upper clamp includes a bolted connection part, an inclined part, and a horizontal connection part. Both bolted connection parts are horizontally arranged. There is one horizontal connection part, which is also horizontally arranged. There is a preset height difference between the horizontal connection part and the bolted connection part. The two inclined parts on the left and right are used to connect the bolted connection part and the horizontal connection part on that side, respectively.

3. The high-precision marine diesel engine cylinder liner processing tooling fixture according to claim 1, characterized in that, The support component is a positioning plate, and the positioning plate has a screw hole on the side near the inclined surface. The inclined surface also has a screw hole, and the lower clamp has a mounting hole for the passage of a screw and a nut.

Images