Process for machining wearing ring of cylinder liner of large low-speed marine diesel engine

A marine diesel engine and processing technology, which is applied in metal processing, metal processing equipment, metal processing machinery parts, etc., can solve the problems of increasing the cost of marine main engines and the amazing increase, and achieves solving micro deformation, reducing resonance amplitude, and eliminating stress deformation. Effect

Active Publication Date: 2012-05-16
DALIAN MARINE DIESEL
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  • Description
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  • Application Information

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Problems solved by technology

With the vigorous development of the international shipbuilding industry, the price of imported parts of marine diesel engines i

Method used

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  • Process for machining wearing ring of cylinder liner of large low-speed marine diesel engine
  • Process for machining wearing ring of cylinder liner of large low-speed marine diesel engine

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Embodiment Construction

[0015] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0016] 7RTA72U-B marine diesel engine cylinder liner wear ring processing technology is as follows:

[0017] a. Select the outer diameter as Inner diameter is A 35CrMoA forging blank with a length of 165mm. In order to eliminate the stress effect generated in the turning process, the allowance of the inner and outer circles of the blank should not be too small.

[0018] b. Turn one end face of the wear-resistant ring blank of the cylinder liner flat, and turn out the outer circle to find the alignment ring; at a distance of 10mm from the flat end face of the car, process a 15mm wide and 10mm deep technological ring groove;

[0019] c. Clamping: clamp the above-mentioned workpiece on a vertical lathe through a new type of fixture, such as figure 1 As shown, the new fixture is provided with a circular platform 1, on which six evenly distributed equal...

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Abstract

The invention discloses a process for machining a wearing ring of a cylinder liner of a large low-speed marine diesel engine. Radial clamping force which is applied by a clamping jaw for machining of a vertical lathe to the wearing ring is converted into axial clamping force applied to the wearing ring through a novel fixture to ensure that the action point of the clamping force is separated fromthe machining surface of a blank, and a workpiece is machined in a free state. Therefore, the phenomenon that the workpiece is deformed after the radial clamping force is applied to finish machining can be avoided. By repeatedly adjusting cutting parameters and process steps of a machine tool, the resonance amplitude is reduced so as to guarantee stable cutting and quality. The stress influence which is produced during turning can be eliminated in a mode of increasing processing frequency of a semi-finished product. Before finish machining and forming, stress deformation is eliminated throughone-time heat treatment, so slight deformation caused by machining can be eliminated, and inner stress of the workpiece can be released quickly and balance is achieved.

Description

Technical field: [0001] The invention relates to a process for processing a wear-resistant ring of a cylinder liner of a large low-speed marine diesel engine. Background technique: [0002] In order to enhance the abnormal wear of the relevant parts of the large low-speed marine diesel engine, a wear-resistant ring is set and inlaid on the upper part of the cylinder liner of the diesel engine. Practice has proved that the setting of the wear ring plays a very important role in suppressing the abnormal wear of the relevant parts of the diesel engine. [0003] RTA large low-speed marine diesel engine cylinder liner wear ring, its outer diameter is The wall thickness is only 8-10mm, the upper end is 20° groove, R10 arc transition, and the dimensional tolerance and surface roughness requirements are very strict, which belongs to the typical large diameter and thin wall parts. The processing of such large-diameter, thin-walled parts has always been a difficult point in my coun...

Claims

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Application Information

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IPC IPC(8): B23B5/00B23Q3/06B23P25/00
Inventor 徐国成赵金刚侯新华
Owner DALIAN MARINE DIESEL
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