CN102071298A - Shot blasting and strengthening process - Google Patents
Shot blasting and strengthening process Download PDFInfo
- Publication number
- CN102071298A CN102071298A CN200910234100XA CN200910234100A CN102071298A CN 102071298 A CN102071298 A CN 102071298A CN 200910234100X A CN200910234100X A CN 200910234100XA CN 200910234100 A CN200910234100 A CN 200910234100A CN 102071298 A CN102071298 A CN 102071298A
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- China
- Prior art keywords
- shot blasting
- upper belt
- strength
- strengthening
- fatigue
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a shot blasting and strengthening process. In the invention, after cylinder liner processing is ended, a part of an upper belt adjacent to a circular bead part is reserved with 1/4 of the width of the upper belt, the rest part is protected by using a semi-circle ring made of two steel plates, and a mobile handheld type shot blasting machine which is convenient to process a grinding undercut, a lower table-board and a part of the upper belt part can be used; and the requirements on shot blasting quality parameters of the anti-fatigue strengthening of the lower end surface of a ship engine cylinder sleeve supporting shoulder are as follows: cast steel balls of which the diameter is 1mm are adopted for shot blasting, and the shot blasting strength is the strength of a most frequently used test piece A of 0.008-0.01 inch, thus after the surface of the cylinder liner to be processed is subjected to shot blasting, the surface pressure stress is increased, and the anti-fatigue strength is enhanced.
Description
Affiliated technical field
Large-power marine diesel engines cylinder sleeve strengthening treatment process in the present invention relates to.
Background technology
High-power diesel engine in peculiar to vessel is because its working load is bigger, and again because of many combusting heavy oils, its Working environment is also relatively more abominable, and cylinder sleeve is frequently impacted, and causes shoulder fracture incident more because of fatigue failure.
Summary of the invention
The invention provides a kind of cylinder sleeve reinforcing process,, improve the anti-fatigue ability of cylinder sleeve, reduce the generation of cylinder sleeve shoulder fracture failure incident by shoulder is carried out the shot blasting on surface processing in assembling grinding undercut position down.
It is after the cylinder sleeve machining is finished that the present invention solves the method that its technical problem adopts, and to Metal Ball shot peening being carried out at the grinding undercut position of its shoulder lower surface, has increased surface stress, reduces the structural stress at grinding undercut position under the shoulder.
The invention has the beneficial effects as follows that anti-fatigue ability improves, reduce disconnected platform incident and take place.
Specific implementation method
It is as follows that the present invention solves ball blasting method flow process and method that its technical problem adopts:
The flow process that the shot peening strengthening of cylinder sleeve is handled is, liner blank goes the thermal stresses and the rough machined machining stress of casting through tempering after the roughing, endoporus and the semi-finishing of cylindrical position then, the cylindrical finish turning is worked into final dimension again, then thick, the microhoning of endoporus is worked into final dimension, follow shot peening, back purged and packed again.
Concrete blasting technology parameter is as follows: will go up waistband after cylinder sleeve mechanical workout finishes and leave 1/4 of waistband width near the shoulder position; all the other positions will be protected with the semicircular ring that two block plates are made; with removable hand-held shotblasting machine; can conveniently go up the waistband position to its grinding undercut that need strengthen, following table and part and handle, the speed of its shot-peening, flow and shot-peening time formulate according to the shot-peening area of blaster and cylinder sleeve workpiece.The shot-peening mass parameter that supports the antifatigue reinforcement of shoulder lower surface for ship machine cylinder sleeve requires as follows; it is 1mm cast steel ball that shot-peening adopts diameter; shot peening strength is the most frequently used A test piece 0.008-0.01 inch; the pending surface of cylinder sleeve is through after the shot peening like this; the protection of dismounting semicircular ring; bearing stress improves fatigue resistance.
Claims (1)
1. a stress peening process is characterized in that:
1. strengthening the position is that grinding undercut, following table and part go up the waistband position.
2. blasting technology parameter diameter is a 1mm cast steel ball, and intensity is the most frequently used A test piece 0.008-0.01 inch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234100XA CN102071298A (en) | 2009-11-20 | 2009-11-20 | Shot blasting and strengthening process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234100XA CN102071298A (en) | 2009-11-20 | 2009-11-20 | Shot blasting and strengthening process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102071298A true CN102071298A (en) | 2011-05-25 |
Family
ID=44030055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910234100XA Pending CN102071298A (en) | 2009-11-20 | 2009-11-20 | Shot blasting and strengthening process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102071298A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014313A (en) * | 2012-11-30 | 2013-04-03 | 河南省中原内配股份有限公司 | Method for strengthening cylinder sleeve |
| CN104561480A (en) * | 2015-01-21 | 2015-04-29 | 柳州聚龙科技有限公司 | Surface treatment method for automobile engine cylinder jacket |
-
2009
- 2009-11-20 CN CN200910234100XA patent/CN102071298A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014313A (en) * | 2012-11-30 | 2013-04-03 | 河南省中原内配股份有限公司 | Method for strengthening cylinder sleeve |
| CN104561480A (en) * | 2015-01-21 | 2015-04-29 | 柳州聚龙科技有限公司 | Surface treatment method for automobile engine cylinder jacket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110525 |