Method for casting cylinder cover of low-speed diesel for large-bore vessel

A cylinder head and diesel engine technology, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of uneven product materials, large product processing allowances, local stress concentration, etc., to shorten the production cycle and reduce production costs The effect of reducing and reducing the production cycle

Inactive Publication Date: 2010-06-09
HUDONG HEAVY MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the past, all products of this type used forgings, and steel ingots were first cast by casting, and then forged. This process has a long production cycle, high cost, and a large processing allowance. Cause uneven product material and local stress concentration

Method used

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  • Method for casting cylinder cover of low-speed diesel for large-bore vessel
  • Method for casting cylinder cover of low-speed diesel for large-bore vessel
  • Method for casting cylinder cover of low-speed diesel for large-bore vessel

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Embodiment 1

[0026] In order to illustrate the casting method of the cylinder head of the marine low-speed large-bore diesel engine of the present invention, the practical application of the method of the present invention is described in detail by taking the casting process of the cylinder head of the S70MC marine low-speed large-bore diesel engine as an example.

[0027] The parameters of S70MC marine low-speed large-bore diesel engine cylinder head castings are as follows:

[0028] Dimensions of casting: Φ1322mm×650mm;

[0029] Maximum wall thickness of the casting (at the exhaust valve): 467mm

[0030] Minimum casting wall thickness: 177mm

[0031] Casting blank weight: ~4700kg

[0032] The volume of the whole casting: 568145941mm 3

[0033] The entire casting surface area: 5770550mm 2

[0034] Casting cross-sectional area: 210961mm 2

[0035] Circumference of casting cross section: 2131mm

[0036] According to the casting method of the present invention, the casting of the cy...

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Abstract

The invention relates to a method for casting a cylinder cover of a low-speed diesel for a large-bore vessel, which mainly comprises the steps of planning a casting process, manufacturing a wood mould, manufacturing a sand mould, assembling the moulds, pouring, cooling and cleaning cast. The method comprises the following steps in details: (1) planning the casting process of the cylinder cover, and designing a parting surface and a casting system according to a flat parting method; (2) manufacturing the wood mould according to the technological requirement, and positioning the wood mould on a template; (3) manufacturing cast and placing risers; (4) assembling the moulds, and drying the sand mould; (5) smelting cast solution, blowing inert gas and feeding in the smelting process; (6) pouring the cast; and (7) preserving the heat and cooling the cast, and carrying out performance heat treatment on the cast. The method manufactures the cylinder cover of the low-speed large-bore diesel by a casting mode instead of forging, can greatly reduce production cost, and shorten production period.

Description

technical field [0001] The invention relates to material molding, in particular to a casting method for a cylinder head of a large-bore marine low-speed diesel engine. Background technique [0002] The cylinder head is a high-demand steel casting on a diesel engine. Together with the cylinder liner and the piston, it forms a closed combustion chamber space. The working condition of the cylinder head is very harsh, it is subjected to the action of high temperature and high pressure gas, it bears great thermal stress and mechanical stress, and the water chamber is also corroded by cooling water. Many holes have been drilled, and the design and process requirements are relatively high. According to the technical specifications of the low-speed diesel engine patent company, the casting material is: S17MoF, and the performance requirements of the casting conjoined test bar are: tensile strength 640-740N / mm 2 , yield strength ≥ 450N / mm 2 , elongation ≥ 18%, reduction of area ≥ ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22
Inventor 许驰华金志宏蔡常林
Owner HUDONG HEAVY MACHINERY
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