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Dry cylinder liner preparation technology

A technology for preparing technology and cylinder liners, which is applied in the direction of cylinders, cylinder heads, mechanical equipment, etc., can solve problems such as unreasonable process layout and long process flow, and achieve the effect of lean equipment layout, low comprehensive cost and reasonable process

Active Publication Date: 2018-03-30
ZYNP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The flow of the original process: rough turning outer circle, rough boring inner hole, heat treatment, repairing, fine boring inner hole, semi-finishing turning, finishing turning outer circle, rough grinding outer circle, fine grinding outer circle, milling notch; the original process The process is long, the process layout is unreasonable, and it needs to be solved harshly

Method used

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  • Dry cylinder liner preparation technology
  • Dry cylinder liner preparation technology
  • Dry cylinder liner preparation technology

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a preparation process of a Euro VI dry cylinder liner comprises the following steps:

[0030] (1) Cylinder liner castings are prepared by metal-type wet coating centrifugal casting process, and then the cylinder liner castings are sawn into individual cylinder liner blanks by high-precision sawing machine and subjected to heat treatment. The heat treatment refers to stress-relief annealing at 530°C for 3 hours; The total length of the blank workpiece is 158-158.5mm and the runout of the end surface is less than 0.8mm;

[0031] (2) Boring the inner hole: use the three-jaw boring tool to clamp the outer circle of the workpiece for high-speed boring inner hole; use a CNC lathe (model: T65 / 750, manufacturer: Zhejiang Headman Intelligent Equipment Co., Ltd.), the machining allowance 3mm, divided into 3 passes, the speed S is 1200 rpm, the feed rate F is 0.3-0.5mm / rotation, and the inner hole size is 81.1±0.09mm, the machining accuracy is 0.005mm, ...

Embodiment 2

[0036] Such as figure 2 Shown, a kind of preparation technology of dry type cylinder liner comprises the following steps:

[0037] (1) Cylinder liner castings are prepared by centrifugal casting process of steel pipe or metal mold wet paint, and then the cylinder liner castings are cut into individual cylinder liner blanks by high-precision sawing machine and heat treated. The heat treatment refers to stress relief annealing at 530°C for 3 hours ;The total length of the workpiece conforming to the design is 134.3-134.8mm and the runout of the end surface is less than 0.8mm;

[0038] (2) Boring the inner hole: use the three-jaw boring tool to clamp the outer circle for high-speed boring inner hole; use a CNC lathe (model: T65 / 750, manufacturer: Zhejiang Heideman Intelligent Equipment Co., Ltd.), machining allowance 2 -3mm, divided into 2-3 passes, the speed S is 1000-1500 rpm, the feed rate F is 0.3-0.6 mm / rotation, and the inner hole size is 90.74±0.09mm, the machining accur...

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Abstract

The invention discloses a dry cylinder liner preparation technology, and belongs to the technical field of cylinder liner production. The dry cylinder liner preparation technology comprises casting and machining, and specifically comprises the following preparation steps that (1) a cylinder liner casting piece is prepared through a steel pipe or metal mold wet coating centrifugal casting technology, then, the cylinder liner casting piece is sawn into cylinder liner casting piece blanks, and heat treatment is conducted on the blanks; and (2) the cylinder liner casting piece obtained in the step(1) is subjected to inner hole cutting and outer circle cutting and then follow-up outer circle grinding and milling through a high-precision machine tool, and specifically, inner hole boring, outercircle finish turning, outer circle finish grinding and opening milling are conducted. According to equipment adopted in the technological method, sawing is conducted through a high-precision sawing machine, inner hole boring and outer circle finish turning are conducted through a full-featured numerically-controlled machine tool, outer circle finish grinding is conducted through a high-precisiongrinding machine, and opening milling is conducted through a numerically-controlled machining center. The technological method is suitable for cast iron cylinder liner machining and steel cylinder liner machining. The dry cylinder liner preparation technology has the beneficial effects that the process flow is short, layout is reasonable, the production efficiency is high, the quality is stable, and the comprehensive cost is low.

Description

technical field [0001] The invention belongs to the field of cylinder liner production, and in particular relates to a preparation process of a dry type cylinder liner. Background technique [0002] The cylinder liner is one of the key parts of the engine, and the technological process of the cylinder liner directly affects the performance, cost and technical indicators of the cylinder liner. The complexity of the processing process of the cylinder liner and whether the process layout is reasonable are the basis for judging whether the processing technology is good or bad. [0003] The engine cylinder liner can be divided into wet cylinder liner, dry cylinder liner and air-cooled cylinder liner according to the cooling method. The so-called wet cylinder liner is that the coolant directly contacts the outer circle of the cylinder liner water jacket. The typical feature is that the cylinder liner wall is thicker, It is heavy, and the outer circle is in clearance fit with the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F02F1/00
CPCB23P15/00F02F1/004
Inventor 张伦敦周广辉曾应歌李永峰刘金萍朱强赵艳稳
Owner ZYNP GRP
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