Marine engine base assembly method, engine base and engine

Abstract

The invention relates to a marine engine base assembly method, an engine base and an engine, firstly, an oil pan, a bottom plate, an end plate and a flange are assembled, welded and fixed to form an oil pan-bottom plate assembly, and then the oil pan-bottom plate assembly and an assembled base body assembly composed of a top plate, a single piece and a side plate are assembled, welded and fixed to form an oil pan-bottom plate assembly. By the adoption of the assembling method, the working environment of workers is improved, the labor intensity of the workers is relieved, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of marine engines, and in particular to a marine engine base assembly method, an engine base and an engine. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] like Figure 1 As shown, the current assembly sequence of the engine base of a marine diesel engine in the same industry is to assemble the top plate 1, the single plate 2, the side plate 3, and the bottom plate 4 in sequence, then flip the engine base as a whole and weld it. After welding, assemble the oil pan 5, the end plate 6, the flange 7 and other components in sequence to form a complete engine base assembly, and then perform a second overall flip and welding.

[0004] The top plate of the machine base has poor rigidity. After the welding of the oil pan assembly is completed, the gear spacing becomes larger due to welding deformation and shrinkage of the bottom plate assembly, and the workload of adjusting the shape is very large, resulting in low production efficiency and difficult to ensure product quality. After the secondary assembly of the oil pan and other components, the oil pan is supported by the side plate, top plate and the main machine base assembly composed of a single piece, so its height is located in a small space, the construction space is small, the workers' working environment is poor, the labor intensity is high, and the manufacturing cycle is long. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a marine engine base assembly method, an engine base, and an engine, which overcome the defects of the current marine engine base assembly method.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the present invention provides a method for assembling a marine engine base, wherein an oil pan, a bottom plate, an end plate, and a flange are first assembled and welded to form an oil pan-bottom plate assembly, and then the oil pan-bottom plate assembly is assembled and welded to the assembled base main body assembly consisting of a top plate, a single piece, and a side plate, thereby completing the assembly of the entire marine engine base.

[0008] Optionally, the assembly method includes the following specific steps:

[0009] Step 1: assemble the oil pan-bottom plate assembly and the unit main assembly simultaneously, wherein the assembly of the oil pan-bottom plate assembly includes the following steps:

[0010] Place the base plate on the workbench;

[0011] Assemble the bottom plate with the oil pan, end plate and flange;

[0012] The bottom plate is welded and fixed to the oil pan, the end plate is welded and fixed to the oil pan and the bottom plate, and the flange is welded and fixed to the oil pan, thus completing the assembly of the oil pan-bottom plate assembly;

[0013] Step 2: Assemble the engine base main assembly and the oil pan-bottom plate assembly and weld them in place.

[0014] Optionally, the base main body component and the oil pan-bottom plate component are assembled and then tack welded, and then flip welded.

[0015] Optionally, the workbench includes a first support platform and a second support platform arranged in parallel, and the vertical cross-sections of the first support platform and the second support platform are both isosceles trapezoidal, and the end faces of the first support platform and the second support platform with larger areas are used for fixing to the ground foundation, and the end faces with smaller areas are used for cooperating with the base plate.

[0016] Optionally, both the first supporting platform and the second supporting platform adopt a hollow structure.

[0017] Optionally, after the marine engine base is assembled, VT and / or MT and / or UT tests are performed, and the next process is entered after the test is qualified.

[0018] Optionally, after the base plate is placed on the workbench, the base plate and the workbench are rigidly fixed.

[0019] Optionally, the base plate and the workbench are fixed by spot welding or a pressing block is provided on the base plate, a fixing bolt passes through the pressing block, and the fixing bolt is threadedly connected to a threaded hole provided on the workbench, and the pressing block presses the base plate onto the surface of the workbench.

[0020] In a second aspect, an embodiment of the present invention provides a marine engine base, which is assembled using the marine engine base assembly method described in the first aspect.

[0021] In a third aspect, an embodiment of the present invention provides a marine engine, comprising the marine engine base described in the second aspect.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The assembly method of the present invention first assembles and welds the oil pan and the bottom plate, and then assembles and welds the oil pan-bottom plate assembly of the profile with the machine base main body assembly composed of the top plate, the side plate and the single piece. When the oil pan-bottom plate assembly and the machine base main body assembly are assembled and welded, the oil pan and the bottom plate have been welded, which reduces welding deformation and shrinkage of the bottom plate, reduces the workload of adjustment, and improves production efficiency and product quality.

[0024] 2. In the assembly method of the present invention, the oil pan and the bottom plate are assembled and welded after the bottom plate is set on the workbench. The height of the workbench can be set to meet the ergonomic standards. At the same time, the workbench makes the oil pan and the bottom plate in a semi-open state, avoiding the need for traditional oil pan assembly and welding to be carried out in a small high-altitude space. The construction space is large, the working environment of the staff is improved, and the working efficiency is improved.

[0025] 3. In the assembly method of the present invention, the oil pan-bottom plate assembly and the engine base main body assembly can be assembled synchronously, which shortens the assembly time of the engine base and reduces the manufacturing cycle of the engine base. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 It is an existing marine engine base assembly flow chart;

[0028] Figure 2 This is a flow chart of assembling the engine base of Embodiment 1 of the present invention;

[0029] Among them, 1. bottom plate, 2. single plate, 3. side plate, 4. bottom plate, 5. oil pan, 6. end plate, 7. flange, 8. first support platform, 9. second support platform. DETAILED DESCRIPTION

[0030] Example 1

[0031] This embodiment provides a method for assembling a marine engine base, such as Figure 2 As shown, the following steps are included:

[0032] Step 1: Simultaneously assemble the oil pan-bottom plate assembly and the main assembly of the unit.

[0033] The assembly of the oil pan-bottom plate assembly includes the following steps:

[0034] Step a: Place the base plate 1 on a workbench, use the workbench to support the base plate 1, and rigidly fix the base plate 1 to the workbench.

[0035] In this embodiment, the workbench includes a first support platform 8 and a second support platform 9. The first support platform 8 and the second support platform 9 respectively cooperate with two sides of the bottom plate to support the bottom plate.

[0036] In this embodiment, the vertical cross-sections of the first support platform 8 and the second support platform 9 are both isosceles trapezoids. The larger bottom surfaces of the first support platform 8 and the second support platform 9 are fixed on the ground, and the smaller top surfaces are used to cooperate with the base plate 1 to support the base plate 1. The first support platform 8 and the second support platform 9 adopt a hollow structure.

[0037] After placing the base plate 1 on the first support platform 8 and the second support platform 9, the base plate 1 is spot-welded to the first support platform 8 and the second support platform 9 to achieve a rigid connection between the base plate and the first support platform 8 and the second support platform 9. When the base plate and the first support platform 8 and the second support platform 9 need to be separated later, it is only necessary to grind at the welding position to separate the base plate 1 from the first support platform 8 and the second support platform 9.

[0038] In another embodiment, the first support platform 8 and the second support platform 9 are provided with a plurality of pressing blocks. After the base plate 1 is placed on the first support platform 8 and the second support platform 9, the pressing blocks are pressed on the upper surface of the base plate 1, and then bolts are passed through the pressing blocks and threadedly connected to the first support platform 8 and the second support platform 9 through the threaded holes provided in the first support platform 8 and the second support platform 9. The pressing blocks press the base plate 1 tightly against the upper surfaces of the first support platform 8 and the second support platform 9 to achieve a rigid connection between the base plate 1 and the first support platform 8 and the second support platform 9.

[0039] The bottom plate 1 is rigidly connected to the first support platform 8 and the second support platform 9, thereby reducing deformation in the subsequent welding process.

[0040] In this embodiment, the height of the first support platform 8 and the second support platform 9 is a set height, and the set height meets the ergonomic standards, so that the welder can sit on a chair of appropriate height to perform welding operations.

[0041] Step b: Assemble the oil pan 5, the end plate 6, the flange 7 and the bottom plate 4 according to the dimensions of the drawing. The assembly method can be the existing method, which will not be described in detail here. Then, the oil pan 5, the end plate 6 and the bottom plate 4 are welded and fixed, and the flange 7 is welded and fixed to the oil pan 5 to complete the assembly of the oil pan-bottom plate assembly. After welding is completed, remove the bolts and take off the pressing block.

[0042] In this embodiment, the welder can perform welding operations on the various components of the oil pan-bottom plate assembly on the inside or outside of the workbench. The oil pan-bottom plate assembly is in a semi-open state, which improves the welder's working environment and labor intensity.

[0043] While step a and step b are being carried out, the top plate 1, the single piece 2 and the side plate 3 of the engine base are assembled on the assembly platform according to the drawings and the process, and then welded. After the dimensions are measured to meet the tolerance requirements, the assembly of the main assembly of the base is completed. The assembly of the main assembly of the base can be carried out using existing technology and will not be described in detail here.

[0044] Step 2: Assemble the assembled oil pan-bottom plate assembly with the main engine base assembly to form the engine base assembly component, and perform positioning welding on the oil pan-bottom plate assembly and the main engine base assembly. After the positioning welding is completed, the engine base assembly component is flipped and welded as a whole. After the welding is completed, the assembly of the entire engine base is completed.

[0045] After the marine engine base is assembled, VT and / or MT and / or UT tests are carried out, and the next process is entered after the test is qualified. VT test, MT test and UT test can adopt existing test methods, which will not be described in detail here.

[0046] By adopting the assembly method of the present embodiment, when the oil pan-bottom plate assembly and the engine base main body assembly are assembled and welded, the oil pan and the bottom plate have been welded, which reduces welding deformation and shrinkage of the bottom plate, reduces the workload of adjusting the shape, and improves production efficiency and product quality. Moreover, the height of the workbench can be set to meet ergonomic standards. At the same time, the workbench puts the oil pan and the bottom plate in a semi-open state, avoiding the traditional oil pan assembly and welding in a small space. The construction space is large, the working environment of the staff is improved, and the working efficiency is improved. In addition, the oil pan-bottom plate assembly and the engine base main body assembly can be assembled synchronously, which shortens the assembly time of the engine base and reduces the manufacturing cycle of the engine base.

[0047] Example 2

[0048] This embodiment provides a marine engine base, which is assembled using the marine engine base assembly method described in Embodiment 1.

[0049] Example 3

[0050] This embodiment provides a marine engine, which is provided with the marine engine base described in Embodiment 2. The remaining structures of the marine engine can adopt the existing technology and will not be described in detail here.

[0051] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for assembling a marine engine base, characterized in that: First, the oil pan, bottom plate, end plate and flange are assembled and welded to form an oil pan-bottom plate assembly. Then the oil pan-bottom plate assembly is assembled and welded with the assembled engine base main body assembly consisting of the top plate, single piece and side plates to complete the assembly of the entire marine engine base.

2. The method for assembling a marine engine seat according to claim 1, characterized in that: After the main engine base assembly and the oil pan-bottom plate assembly are assembled, positioning welding is performed, and after the positioning welding is completed, flip welding is performed.

3. The method for assembling a marine engine base according to claim 1, characterized in that: The specific steps include: Step 1: assemble the oil pan-bottom plate assembly and the unit main assembly simultaneously, wherein the assembly of the oil pan-bottom plate assembly includes the following steps: Place the base plate on the workbench; Assemble the bottom plate with the oil pan, end plate and flange; The bottom plate is welded and fixed to the oil pan, the end plate is welded and fixed to the oil pan and the bottom plate, and the flange is welded and fixed to the oil pan, thus completing the assembly of the oil pan-bottom plate assembly; Step 2: Assemble the engine base main assembly and the oil pan-bottom plate assembly and weld them in place.

4. The method for assembling a marine engine base according to claim 3, characterized in that: The workbench includes a first support platform and a second support platform arranged in parallel. The vertical cross-sections of the first support platform and the second support platform are both isosceles trapezoidal. The end faces of the first support platform and the second support platform with larger areas are used for fixing to the ground foundation, and the end faces with smaller areas are used for cooperating with the base plate.

5. The method for assembling a marine engine base according to claim 4, characterized in that: The first supporting platform and the second supporting platform both adopt a hollow structure.

6. The method for assembling a marine engine base according to claim 3, characterized in that: After the base plate is placed on the workbench, the base plate and the workbench are rigidly fixed.

7. The method for assembling a marine engine base according to claim 6, characterized in that: The bottom plate and the workbench are fixed by spot welding or a pressing block is arranged on the bottom plate, a fixing bolt passes through the pressing block, and the fixing bolt is threadedly connected with a threaded hole arranged on the workbench, and the pressing block presses the bottom plate onto the surface of the workbench.

8. The method for assembling a marine engine base according to claim 1, characterized in that: After the marine engine base is assembled, VT and / or MT and / or UT tests are carried out, and the next process is entered after passing the test.

9. A marine engine base, characterized in that: The marine engine base is assembled by the marine engine base assembly method according to any one of claims 1 to 8.

10. A marine engine, characterized in that: The invention comprises the marine engine base as claimed in claim 9.

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