Method for processing slant oil hole in middle-speed machine crankshaft

A technology of oblique oil holes and crankshafts, which is applied in metal processing equipment, manufacturing tools, boring/drilling, etc., and can solve the problems that the drill bit is easy to break and cannot be drilled

Active Publication Date: 2009-06-24
武汉重工铸锻有限责任公司
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the two oblique oil holes of the same crank are perpendicular to the adjacent crank obliquely crossing 14 (see Figure 6), the drill

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for processing slant oil hole in middle-speed machine crankshaft
  • Method for processing slant oil hole in middle-speed machine crankshaft
  • Method for processing slant oil hole in middle-speed machine crankshaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] refer to image 3 , Figure 4 , The crankshaft of the medium-speed machine mainly consists of free end 3, thrust end 4, main journal 5, turning neck 6, turning arm 7 and other parts. Wherein there are load relief grooves 8, φ20 crossing oblique oil holes 1, and balance block surfaces 9.

[0013] When processing the crankshaft of a medium-speed machine, the crankshaft blank of the medium-speed machine is formed by TR pier forging in one time according to the traditional method, and then the main journal, turning neck, load relief groove, output end, and free end flange are milled, and the shape of the balance block and the crank arm is milled. , Drilling and machining of evenly distributed holes and screw holes on the end face of the flange, grinding the main journal and turning neck, and finishing.

[0014] Machining by gun drilling figure 1 The shown 700mm long, φ206PC crankshaft oblique oil hole can be processed in 30 minutes, and the size and roughness can meet th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for processing an oblique oil hole of a crankshaft of a medium speed machine. A gun drill with length-diameter ratio of 30:1 is adopted for drilling and cutting; the drilling and cutting process of the gun drill comprises the drilling and cutting of a guide hole and an oil hole; the diameter of the guide hole is larger than that of the gun drill by 0.01 to 0.02 mm; the depth of the hole is double of the diameter of the gun drill; in the process of drilling and cutting the guide hole, high-pressure mixed cold air is used to spray and cool temperature; chips are discharged; the oil hole is drilled and cut by stages; a short gun drill drills first and machines the oil hole to the depth of between 300 and 310 mm; after the gun drill passes through a crossed hole, a long gun drill replaces the short gun drill and drills and machines the oil hole to the depth of 709 mm to the crossed hole; a plug is used to plug the processed oblique oil hole; the plug is fixed by screw threads; the gap part of the crossed hole is sealed; and the guide hole is drilled and cut by stages. A phi 20 oblique oil hole of a 6PC crankshaft is machined according to the method, not only can ensure the quality of a product, but also greatly improve production efficiency.

Description

technical field [0001] The invention relates to a method for machining oblique oil holes in the crankshaft of a medium-speed machine. Background technique [0002] The main component of the ship is the diesel engine, and the core component of the diesel engine is the crankshaft. However, the processing of the crankshaft has many processes and the long route has become the bottleneck of the shipbuilding industry. The crankshaft processing progress and quality directly affect the delivery of new ships. For example, the 6PC2-6 crankshaft used to be imported from abroad, and the processing equipment used was a turning-milling compound machining center. However, our company's ordinary CNC machine tools have no processing schemes that can be used for reference. The 6PC2-6 crankshaft is the largest crankshaft among medium-speed diesel engine crankshafts. The crankshaft has the characteristics of high machining accuracy, large metal removal rate, large number of holes, small and de...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B23B41/02
Inventor 陈文曹志勇毕朝双黄新文谭大伟于运海胡美丽沈慧敏王刚刘东静黄继武魏琴
Owner 武汉重工铸锻有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap