CN112706897B - Assembly process method of engine base of marine diesel engine - Google Patents
Assembly process method of engine base of marine diesel engine Download PDFInfo
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- CN112706897B CN112706897B CN202011365940.2A CN202011365940A CN112706897B CN 112706897 B CN112706897 B CN 112706897B CN 202011365940 A CN202011365940 A CN 202011365940A CN 112706897 B CN112706897 B CN 112706897B
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- base
- jig frame
- bottom plate
- panel
- engine base
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Automatic Assembly (AREA)
Abstract
The invention relates to the technical field of ship equipment, and discloses an assembly process method of a marine diesel engine base. According to the assembly process method of the marine diesel engine base, the position and the size of the mounting groove are determined according to the model number of the diesel engine base product, the distance between the diesel engine base panel and the bottom plate and the slope data of the side plates, the number of the jig frame tools and the plate thickness and height of the tools are determined by the cylinder number and the cylinder distance data of the diesel engine base product, the design tools are determined, the assembly sequence of parts is optimized, and the assembly process of the diesel engine base is realized.
Description
Technical Field
The invention relates to the technical field of ship equipment, in particular to an assembly process method of a diesel engine base for a ship.
Background
The engine base is an important component in the marine diesel engine and plays a role in bearing the whole weight and the action of bearing the motion inertia force in the diesel engine. The engine base mainly comprises parts such as a bearing seat, a transverse web plate, a bottom plate, a panel, a side plate, an oil pan and the like. The bearing seat is made of cast steel and is used for bearing a transmission crankshaft, so that the requirement on the installation size of the bearing seat is high. The transverse web plate is welded with the bearing seat to support the interior of the machine base. The bottom plate and the panel are positioned on the upper part and the lower part of the engine base, need to be welded and processed, and are used as connecting surfaces of other diesel engine components, so that the mounting size is also highly required. Therefore, in the process of manufacturing the base, how to control the mounting size precision of each part by an assembly method and ensure the size of a machined surface after welding is a great problem. Particularly, with the increasing demand of the market on high-power diesel engines, the diesel engines develop towards the direction of large cylinder diameter and multiple cylinders, and higher requirements are put forward on the size control of the engine base. The traditional assembly process of the engine base is to assemble a bearing seat and a transverse web plate on a platform in advance and then weld the components, and then assemble the bearing seat and the transverse web plate with a bottom plate, a panel and side plates into a box body and then weld the box body together.
Present marine diesel engine frame, in present assembly sequence, welding work volume is big during the totality welding, receive the influence of installation order, in order to keep possessing stable welding effect, guarantee to possess stable antidetonation effect along with base in the propagation navigation, use the contact surface to carry out necessary comprehensive welding as the welding department usually, make the welding work volume of each assembly face very big, and the welding volume accounts for about 80% of all welding work volumes of frame, the welding department is great, the deflection is difficult to control when welding deformation appears, it is not good to use the effect greatly to correct the degree of difficulty after the welding.
In addition, current marine diesel engine frame, in current assembly order, most welding seams are in half confined space during the total welding, the regulation of various angles need be carried out when carrying out weldment work, in order to realize the effective welding of part welding seam position, owing to need frequently adjust welding angle, make welding speed seriously influenced, the welding degree of difficulty is big, welding deviation appears easily, bring the trouble of revising the solder joint, and the weldment work of different angles makes the part remove repeatedly, lack and place neatly nature, the welding operation environment is poor.
On the other hand, in the welding process of the existing marine diesel engine base, the base needs to be lifted and turned over for multiple times to ensure that all welding seams are in a flat welding state, however, a large amount of lifting operation and time for waiting during welding are generated in the lifting and turning process, the manufacturing efficiency is reduced, certain potential safety hazards exist in the lifting and hoisting process, the safety risk is increased due to frequent lifting, and the using effect is poor.
Disclosure of Invention
The invention provides an assembly process method of a marine diesel engine base, which has the advantages of reducing the actual welding amount, reducing the welding difficulty and improving the welding efficiency and solves the problems in the background technology.
The invention provides the following technical scheme: the assembling process method of the marine diesel engine base comprises an assembling platform, wherein a base bearing seat is fixedly installed on the top surface of the assembling platform, a jig frame is fixedly installed on the top surface of the assembling platform, a side plate installing surface is arranged on the top surface of the jig frame, a base side plate is arranged on the top surface of the side plate installing surface, a base bottom plate is movably clamped on the left side surface of the top surface of the jig frame, a base panel is movably clamped on the right side surface of the top surface of the jig frame, and a base transverse web plate is movably clamped between the base bottom plate and the base panel.
Preferably, a bottom plate mounting groove is formed in the left side of the top surface of the jig frame, and the outer surface of the bottom plate mounting groove is movably clamped with the base bottom plate.
Preferably, a panel mounting groove is formed in the right side of the top surface of the jig frame, and the inner surface of the panel mounting groove is movably clamped with the base panel.
Preferably, the positions and the sizes of the bottom plate mounting groove, the side plate mounting groove and the panel mounting groove are determined according to the model of the engine base product, the distance between the engine base panel and the engine base bottom plate and the slope data of the engine base side plate.
Preferably, the number, the plate thickness and the height of the moulding beds are determined by the cylinder number and the cylinder distance data of the base product.
A process method for assembling a marine diesel engine base is characterized by comprising the following steps: comprises the following steps of;
the first step is as follows: vertically arranging jig frame tools on an assembly platform, adjusting the distance, parallelism and straightness of each jig frame tool, and connecting the jig frame tools by virtue of distance pipes;
the second step is that: the assembly of the box body component is completed on the jig frame tool by adopting a side assembly method, the box body component consists of a machine seat panel, a machine seat side plate, a machine seat bottom plate and a machine seat transverse web plate component, the assembly sequence is that the machine seat panel component is vertically inserted into a panel mounting groove on the jig frame tool, the machine seat side plate component is placed on the inclined plane of the jig frame tool, the machine seat bottom plate component is vertically inserted into a bottom plate mounting groove on the jig frame tool, the machine seat transverse web plate component is vertically inserted between the machine seat panel and the machine seat bottom plate, and the box body component is rotated to a welding field to perform welding work among the components after being fixed by spot welding;
a third step; marking out the mounting positions of the machine seat bearing block and the whole assembly of the jig frame on the assembly platform, vertically placing the machine seat bearing block on the assembly platform, assembling the whole assembly of the jig frame assembly to the left side and the right side of the machine seat bearing block, and after spot welding and fixing, turning to a welding field to perform the welding work of the whole assembly of the machine seat bearing block and the left jig frame and the right jig frame.
The invention has the following beneficial effects:
1. according to the assembling process method of the marine diesel engine base, the mounting grooves of the panel, the side plate and the bottom plate are arranged on the jig tool through additionally arranging the jig tool design, the position and the size of each mounting groove are determined according to the model of the diesel engine base product, the distance between the diesel engine base panel and the bottom plate and the slope data of the side plate, the number of the jig tools, the plate thickness and the height of the tools are determined according to the cylinder number and the cylinder distance data of the diesel engine base product, the design tool is optimized, the assembling sequence of parts is optimized, the assembling process of the diesel engine base is realized, the proportion of parts to the total welding quantity is well balanced, the welding deformation is easier to control, the risk of size over-tolerance is reduced, and the difficulty of welding and post-welding correction is reduced.
2. According to the assembling process method of the marine diesel engine base, the jig tool is additionally provided with the mounting grooves of the panel, the side plate and the bottom plate through the design of the jig tool, the positions and the sizes of the mounting grooves are determined according to the model of the marine diesel engine base product, the distance between the base panel and the bottom plate and the slope data of the side plate, the side mounting method is adopted to complete the assembling work of the box body part on the jig tool, meanwhile, the welding state under partial semi-closed space is optimized to be welding under an open environment, the welding difficulty is reduced, and the working environment of a welder during welding is improved.
3. According to the assembling process method of the marine diesel engine base, the mounting positions of the bearing seat and the box body component are marked on the assembling platform, the bearing seat is vertically placed on the assembling platform, the panel part is vertically inserted into the panel mounting groove on the jig frame tool in a matching mode, the side plate part is placed on the inclined plane of the jig frame tool, the bottom plate part is vertically inserted into the bottom plate mounting groove on the jig frame tool, the transverse web plate part is vertically inserted into the panel and the bottom plate in sequence, the time and the lifting labor required by welding are reduced, the production period is shortened, and the production cost is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the mounting of the bearing seat of the stand according to the present invention;
FIG. 3 is a schematic view of the structural assembly of the present invention;
FIG. 4 is a schematic view of the arrangement of the structural jig frame of the present invention;
FIG. 5 is a schematic view of the jig frame structure of the present invention.
In the figure: 1. a base plate of the machine seat; 2. a machine base side plate; 3. a base panel; 4. a machine base bearing seat; 5. a transverse web of the machine base; 6. a jig frame; 7. a bottom plate mounting groove; 8. a side plate mounting groove; 9. a panel mounting groove; 11. and (5) assembling the platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, an assembly process method of a marine diesel engine base comprises an assembly platform 11, a base bearing block 4 is fixedly mounted on the top surface of the assembly platform 11, a jig frame 6 is fixedly mounted on the top surface of the assembly platform 11, a side plate mounting surface 8 is arranged on the top surface of the jig frame 5, a base side plate 2 is arranged on the top surface of the side plate mounting surface 8, a base bottom plate 1 is movably clamped on the left side surface of the top surface of the jig frame 5, a base panel 3 is movably clamped on the right side surface of the top surface of the jig frame 5, and a base transverse web 5 is movably clamped between the base bottom plate 1 and the base panel 3.
Bottom plate mounting groove 7 has been seted up in the left side of 6 top surfaces of bed-jig, and the convenient installation of frame bottom plate 1 is realized to bottom plate mounting groove 7's surface and frame bottom plate 1 activity joint, utilizes bottom plate mounting groove 7.
The positions and sizes of the bottom plate mounting groove 7, the side plate mounting groove 8 and the panel mounting groove 9 are determined according to the model number of the base product, the distance between the base panel 3 and the base bottom plate 1 and the slope data of the base side plate 2.
The number, the plate thickness and the height of the moulding bed 6 are determined by the cylinder number and the cylinder distance data of the base product, so that the related assembly size is ensured, and the size out-of-tolerance risk is reduced.
A process method for assembling a base of a marine diesel engine comprises the following operation steps;
the first step is as follows: vertically arranging the jig frame 6 tools on an assembly platform 11, adjusting the distance, parallelism and straightness of each jig frame 6 tool, and connecting the jig frame 6 tools by distance pipes;
the second step is that: the assembly work of the box body part is finished on a jig frame 6 tool by adopting a side-mounting method, the box body part consists of a machine base panel 3, a machine base side plate 2, a machine base bottom plate 1 and a machine base transverse web plate 5, the assembly sequence is that the machine base panel 3 part is vertically inserted into a panel mounting groove 9 on the jig frame 6 tool, the machine base side plate 2 part is placed on the inclined plane of the jig frame 6 tool, the machine base bottom plate 1 part is vertically inserted into a bottom plate mounting groove 7 on the jig frame 6 tool, the machine base transverse web plate 5 part is vertically inserted between the machine base panel 3 and the machine base plate 1, and the box body part is turned to a welding field to perform welding work among all parts after being fixed by spot welding;
a third step; marking the mounting positions of the machine seat bearing block 4 and the whole assembly of the jig frame 6 on the assembly platform, vertically placing the machine seat bearing block 4 on the assembly platform 11, assembling the whole assembly of the rack 6 to the left side and the right side of the machine seat bearing block 4, and after spot welding and fixing, turning to a welding field to perform the whole welding work of the assembly of the machine seat bearing block 4 and the left jig frame 6 and the right jig frame 6.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The assembly process method of the marine diesel engine base comprises an assembly platform (11), and is characterized in that: a base bearing seat (4) is fixedly mounted on the top surface of the assembly platform (11), a jig frame (6) is fixedly mounted on the top surface of the assembly platform (11), a side plate mounting surface (8) is formed in the top surface of the jig frame (6), a base side plate (2) is arranged on the top surface of the side plate mounting surface (8), a base bottom plate (1) is movably clamped on the left side of the top surface of the jig frame (6), a base panel (3) is movably clamped on the right side of the top surface of the jig frame (6), and a base transverse web (5) is arranged between the base bottom plate (1) and the base panel (3);
comprises the following steps of;
the first step is as follows: vertically arranging the jig frames (6) on an assembly platform (11), adjusting the distance, parallelism and straightness of each jig frame (6), and connecting the jig frames (6) by distance pipes;
the second step: the side-mounting method is adopted to complete the assembly work of the box body part on the jig frame (6), the box body part consists of a machine seat panel (3), machine seat side plates (2), a machine seat bottom plate (1) and a machine seat transverse web plate (5), the assembly sequence is that the machine seat panel (3) is vertically inserted into a panel mounting groove (9) on the jig frame (6), the machine seat side plates (2) are placed on the side plate mounting surface of the jig frame (6), the machine seat bottom plate (1) is vertically inserted into a bottom plate mounting groove (7) on the jig frame (6), the machine seat transverse web plate (5) is vertically inserted between the machine seat panel (3) and the machine seat bottom plate (1), and after spot welding and fixation, the box body part is turned to a welding field to perform the welding work among all parts;
a third step; marking out the mounting positions of the box body parts assembled by the base bearing seat (4) and the jig frame (6) on the assembly platform, vertically placing the base bearing seat (4) on the assembly platform (11), respectively assembling the box body parts assembled by the jig frame (6) to the left side and the right side of the base bearing seat (4), and after spot welding is fixed, rotating to a welding field to weld the left box body part and the right box body part assembled by the base bearing seat (4) and the jig frame (6).
2. The assembly process method of the marine diesel engine base according to claim 1, characterized in that: the positions and the sizes of the bottom plate installation groove (7), the side plate installation surface (8) and the panel installation groove (9) are determined according to the model of the engine base product, the distance between the engine base panel (3) and the engine base bottom plate (1) and the slope data of the engine base side plate (2).
3. The assembly process method of the marine diesel engine base according to claim 1, characterized in that: the number, the plate thickness and the height of the moulding bed (6) are determined by the cylinder number and the cylinder distance data of the base product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011365940.2A CN112706897B (en) | 2020-11-29 | 2020-11-29 | Assembly process method of engine base of marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011365940.2A CN112706897B (en) | 2020-11-29 | 2020-11-29 | Assembly process method of engine base of marine diesel engine |
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| CN112706897A CN112706897A (en) | 2021-04-27 |
| CN112706897B true CN112706897B (en) | 2022-11-18 |
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| CN202011365940.2A Active CN112706897B (en) | 2020-11-29 | 2020-11-29 | Assembly process method of engine base of marine diesel engine |
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| CN115055859A (en) * | 2022-07-28 | 2022-09-16 | 大连船用柴油机有限公司 | Assembling and welding method for large-scale low-speed marine diesel engine base |
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| CN109434350A (en) * | 2018-11-14 | 2019-03-08 | 中船海洋动力部件有限公司 | Automated assembly device suitable for a variety of marine diesel housiung separator components |
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2020
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405482A (en) * | 2002-11-11 | 2003-03-26 | 沪东重机股份有限公司 | Low-speed diesel engine frame welding method |
| JP2007024029A (en) * | 2005-07-13 | 2007-02-01 | Man B & W Diesel As | Crosshead two-stroke internal combustion engine having oil pan installed under bed plate |
| CN101025113A (en) * | 2006-02-24 | 2007-08-29 | 瓦特西拉瑞士股份有限公司 | Large crosshead diesel engine |
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