Anti-deformation Technology of Machining Diesel Engine Crankcase
A crankcase and diesel engine technology, which is applied to metal processing mechanical parts, metal processing equipment, manufacturing tools, etc., can solve the problems of poor flatness of the bottom surface of the crankcase, poor dimensional accuracy, and large deformation of the box body. The effect of high machining accuracy and improved pass rate
Inactive Publication Date: 2011-11-30
CRRC DALIAN CO LTD
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Problems solved by technology
This kind of processing technology has poor dimensional accuracy. Since the crankcase is an open structure, the deformation of the box body is relatively large after the above-mentioned traditional process is used, resulting in the installation of the crankcase combined with the flatness of the bottom surface. The flatness of the bottom surface is generally 0.29 mm, usually The flatness is required to be 0.102 mm, which is seriously out of tolerance
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[0018] The anti-deformation process of processing diesel engine crankcase of the present invention, the steps are as follows:
[0019] a. If figure 1 As shown: the diesel engine crankcase is fixed upright on the workbench 1 of the gantry machining center, and fixed with the upright fixed pressure plate 2 and bolts, and the fixed positions are on both sides of the lower side of the box. The left bevel L and the right bevel K on both sides above the box are roughly machined according to the design requirements.
[0020] b. If figure 2 , 3 As shown: use the left inclined plane L and right inclined plane K rough processed in the previous step as the reference plane to support the box upside down on the workbench 1 of the gantry machining center. The specific fixing method is: use the two sides positioned above the workbench 1 and The slopes on the symmetrically arranged wedge positioning blocks 6 support the left slope L and the right slope K, and there are six wedge positioni...
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An anti-deformation process for processing diesel engine crankcases, the steps are: the diesel engine casing is erected and fixedly supported on the workbench of the gantry machining center, and the left and right slopes above the casing are roughly machined; the left and right slopes are used to Fix the box upside down on the workbench as a reference plane, and support and fix the left and right bevels with the slopes on both sides of the workbench and symmetrically arranged inclined wedge positioning blocks; remove the left slope and the right slope on the box Rough machining of the processing surface other than the right slope; vibration aging treatment; fix the box according to the fixing method in step b, and finish machining the processing surface except the left slope and the right slope; use the processed bottom plane of the box Fix the box upright on the workbench as a reference, and finish machining the left and right slopes. Compared with the prior art, the invention has the advantages of preventing deformation of the box body, high processing precision and small size error, greatly improves the qualified rate of products, and reduces processing cost.
Description
technical field [0001] The invention relates to a machining process, in particular to an anti-deformation process for machining a crankcase of a diesel engine. Background technique [0002] Diesel engine crankcase is a part of diesel engine body with upper and lower structure. The body is composed of crankcase and machine base. The crankcase blank is cast with nodular cast iron. Cylinder holes and camshaft mounting seat holes are processed on the crankcase, and main bearings are processed on the machine base. Holes and main oil passage holes, there are symmetrical slopes above the crankcase, and the crankcase structure is very complicated, showing a V-shaped structure. At present, the process of machining the crankcase is to first fix the crankcase upright on the worktable of the gantry machining center, and then process the sixteen machining support planes on both sides that are reserved for casting above the crankcase. Then use sixteen planes after processing as reference...
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IPC IPC(8): B23Q3/00
Inventor 孙文新王文国于莲隽
Owner CRRC DALIAN CO LTD