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Marine low-speed diesel engine cross-head pin cylindrical surface notch positioning tool and positioning method

A crosshead pin and positioning tooling technology, which is applied in the field of metal cutting, can solve the problems of time-consuming, labor-intensive, low efficiency, and increased processing errors, and achieve the effects of improving production efficiency, reducing processing costs, and saving driving and transportation

Inactive Publication Date: 2019-10-01
CSSC MARINE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before marking the line, it is necessary to lift the crosshead pin to the marking platform with a crane to align it, and then mark the line. It is time-consuming, laborious, inefficient, and increases the processing error

Method used

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  • Marine low-speed diesel engine cross-head pin cylindrical surface notch positioning tool and positioning method
  • Marine low-speed diesel engine cross-head pin cylindrical surface notch positioning tool and positioning method
  • Marine low-speed diesel engine cross-head pin cylindrical surface notch positioning tool and positioning method

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and the positioning tool and positioning method of the crosshead pin cylindrical notch of a certain type of marine low-speed diesel engine.

[0025] Such as Figure 1 to Figure 4 As shown, the positioning tool of this embodiment is a strip-shaped positioning plate 1, and the positioning plate is longitudinally provided with two sets of hinged holes 11, which can be used for crosshead pins 10 of two types. Each group of two reaming holes 11 is respectively matched with the lifting screw hole of the crosshead pin of the corresponding model. The size of the crosshead pin 10 in this embodiment is Φ400mm×600mm, and the size of the positioning plate 1 is 400mm×60mm×10mm. The surface roughness of the side 12 on the positioning plate is Ra=0.8μm~1.6μm, and the flatness tolerance of the side 12 on the positioning plate is ≤0.02mm, which improves the measurement reference accuracy...

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Abstract

The invention discloses a marine low-speed diesel engine cross-head pin cylindrical surface notch positioning tool and a positioning method. The positioning tooling a long strip-shaped positioning plate; the positioning plate is longitudinally provided with a plurality of groups of reaming holes; and each group of two reaming holes are respectively matched with lifting screw holes of a cross-headpin of a corresponding model. The positioning method comprises the following steps of (1), installing a support seat; (2) installing the positioning plate and leveling the upper side of the positioning plate; (3) leveling a cross-head pin upper bus bar and a cross-head pin side bus bar; and (4) rechecking the upper side of the positioning plate. After leveling the positioning plate, the cross-headpin upper bus bar and the cross-head pin side bus bar, a processing coordinate system can be established, so that the marking process is eliminated, 4-5 working hours of crane transfer and alignmentmarking required in the marking process are saved, the production efficiency is improved, and the machining cost of the cross-head pin is reduced.

Description

technical field [0001] The invention relates to a positioning tool for processing diesel engine parts, in particular to a positioning tool and a positioning method for processing crosshead pin cylindrical notches, belonging to the technical field of metal cutting. Background technique [0002] The crosshead pin is the moving part of the marine low-speed diesel engine. It is one of the core parts of the diesel engine and a key part of the high precision of the diesel engine. The processing technology of the existing crosshead pin is as follows: first process the center hole and the lifting hole on both ends of the crosshead pin, then rough turn the outer circle, and then go through the quenching and tempering heat treatment, drilling the middle oil hole and other processes, and then need to make the crosshead pin The purpose of scribing on the front end is to ensure the relative position of each hole on both ends of the crosshead pin and the notch on the cylindrical surface. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/02
CPCB23Q3/02
Inventor 丁健李南饶贵呈张景徐希方朱俊伟徐金荣
Owner CSSC MARINE POWER
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