Machining method for outer layer shell of inner and outer layer assembly type split structure casing

Abstract

The invention relates to the technical field of split structure casings, in particular to a machining method of an outer layer shell of an inner and outer layer assembly type split structure casing, which mainly comprises three stages of rough machining, semi-finish machining and finish machining, a gap of a longitudinal mounting edge part of the outer layer shell is formed in the outer layer shell semi-finish machining stage, and a gap of a longitudinal mounting edge part of the outer layer shell is formed in the outer layer shell semi-finish machining stage. The longitudinal mounting edge of the outer-layer shell is provided with a process part which is connected with the longitudinal mounting edge through a bolt, and the process part is of a sectional structure. According to the machining method, the technological manufacturing process of machining of the assembly type split casing parts can be broken through, the assembly precision of the inner-layer casing and the outer-layer casing is greatly improved, the problems that the inner layer and the outer layer cannot be assembled due to low precision and a large number of clamps are repaired due to local protrusions after assembly are solved, and the one-time machining efficiency of the parts is improved.

Description

Technical Field

[0001] The invention relates to the technical field of split structure casings, and in particular to a method for processing an outer shell of an inner and outer layer assembled split structure casing. Background Art

[0002] As engine performance continues to improve, inner and outer layer assembled split casings will be increasingly used in engine design concepts to increase the overall performance of the engine. In terms of process flow design, the process route of traditional split casing products cannot be blindly applied. The gap of the outer casing is processed in the finishing stage, and the state of the longitudinal mounting edge joint surface and the subsequent assembly relationship are difficult to guarantee. If forming is considered in the process steps, the rounding and assembly of parts need to be considered. Therefore, it is necessary to improve the process manufacturing process of the inner and outer layer assembled split casing, which opens up new ideas for the processing of the casing casing. Summary of the invention

[0003] In view of the problems existing in the prior art, the object of the present invention is to provide a method for processing the outer shell of an inner and outer layer assembled split structure casing, so as to improve the assembly accuracy of the inner and outer layer casings.

[0004] The technical solution adopted by the present invention is: a method for processing the outer shell of an inner and outer layer assembled split structure casing, the outer shell processing method is mainly divided into three stages: rough machining-semi-finishing-finishing;

[0005] The gap at the longitudinal mounting edge of the outer shell is formed during the semi-finishing stage of the outer shell;

[0006] A process part connected to the outer shell by bolts is provided on the longitudinal installation edge of the outer shell;

[0007] The process part is a segmented structure consisting of 4 sections, and the length of each section is between 250mm and 360mm.

[0008] The beneficial effects of the present invention are as follows: the present invention can open up the process manufacturing flow of the assembled split receiver parts processing, greatly improve the assembly accuracy of the inner and outer receivers, avoid the problem of the inner and outer layers being unable to be assembled due to low accuracy and the problem of a large amount of clamp repairs caused by local protrusions after assembly, and improve the one-time processing efficiency of the parts by 60%. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a partial structural schematic diagram of the outer layer assembled split structure casing;

[0010] Among them: 1. Outer shell; 2. Inner shell; 3. Gap; 4. Process parts. DETAILED DESCRIPTION

[0011] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative work belong to the scope of protection of the present invention.

[0012] First, the most prominent difference between the outer assembly split structure casing and the traditional split casing is that the longitudinal mounting edge of the outer shell 1 is designed with a gap 3 for assembly with the inner shell 2, such as Figure 1 As shown, the focus of the processing scheme of the outer shell 1 is on the stage of the processing of the outer shell 1 at which the gap 3 is formed.

[0013] At present, the processing method for the outer shell 1 is mainly divided into three stages: rough processing - semi-finishing processing - finishing processing;

[0014] Based on the above-mentioned existing processing method of the outer shell of the split-type casing, the present invention provides a processing method of the outer shell of the inner and outer assembled split-structure casing: the gap 3 at the longitudinal installation edge of the outer shell 1 is formed in the semi-finishing stage of the outer shell 1;

[0015] Specifically, if the longitudinal installation edge gap 3 is processed last in the finishing stage, because the outer shell 1 has reached the final state, the overall wall thickness is thin, and the overall height of the outer shell 1 is high and the structure is weak in rigidity, it is difficult to ensure the flatness of the longitudinal installation edge assembly surface, and the quality risk is high;

[0016] After rough machining, machining the gap 3 of the longitudinal installation edge under the condition of reserving a margin for the entire outer shell 1 can not only enhance the rigidity of the system, but also ensure the machining quality of the joint surface.

[0017] At the same time, a process part 4 connected to the outer shell 1 by bolts is provided on the longitudinal installation edge. The size of the process part 4 mainly considers the gap size and the coordination with the inner layer of the outer culvert, thereby ensuring the subsequent precision turning and milling processing requirements.

[0018] In addition, since the height of the outer shell 1 is relatively high, the process part 4 of the integrated structure may be deformed during the manufacturing process due to its poor rigidity and long overall length, which may cause the situation that it cannot be effectively assembled with the outer shell 1;

[0019] Therefore, the process part 4 is designed to be a segmented structure to improve the rigidity of each segment and ensure that the assembly requirements are met.

[0020] As a preferred technical solution, the process part 4 can be designed into 4 sections, and the length of each section is between 250 mm and 360 mm.

[0021] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for processing the outer shell of an inner and outer layer assembled split structure casing, the outer shell processing method is mainly divided into three stages: rough machining-semi-finishing-finishing; It is characterized in that The gap at the longitudinal mounting edge of the outer shell is formed during the semi-finishing stage of the outer shell; A process part connected with the outer shell body by bolts is arranged on the longitudinal installation edge of the outer shell body.

2. The method for processing the outer shell of the outer assembly type split structure casing according to claim 1 is characterized in that: The process piece is a segmented structure consisting of 4 sections, and the length of each section is between 250mm and 360mm.

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