CN103045829A - Rolling treatment process - Google Patents
Rolling treatment process Download PDFInfo
- Publication number
- CN103045829A CN103045829A CN 201110324069 CN201110324069A CN103045829A CN 103045829 A CN103045829 A CN 103045829A CN 201110324069 CN201110324069 CN 201110324069 CN 201110324069 A CN201110324069 A CN 201110324069A CN 103045829 A CN103045829 A CN 103045829A
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- China
- Prior art keywords
- rolling
- cylinder sleeve
- hob
- diameter
- treatment process
- Prior art date
- 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 rolling treatment process. The shoulder part of a marine diesel engine cylinder sleeve which is fine machined previously is clamped on a mandril in the vicinity of the main shaft flange of a lathe; and the mandril is supported by a tailstock thimble. GCr15 hob which is quenched previously is employed. The diameter of the hob is determined so that the ratio of the hob diameter to the rolling diameter is between 1/3-1/2. Rolling force can not be ovehigh so as to prevent shoulder breakage caused by pressing; the rolling force is about 10000 N, the rolling direction is 60 degrees, the rolling times are 8-12 and the rolling speed is 30 r/min. The starting point of rolling is coincident with the finishing point of rolling. Magnetic powder inspection is performed to prevent the cylinder sleeve product from crazing due to rolling.
Description
Affiliated technical field
The present invention relates to a kind of novel process of marine diesel cylinder liner intensive treatment.
Background technology
Cylinder sleeve is core part, the vulnerable part of engine, as the marine diesel cylinder liner of high-power because its work under bad environment, working load is very large, simultaneously because the volume of this part is large, Heavy Weight, the place of product repairing is poor, facility is simple and crude, assembled condition is very poor, and assembly precision is relatively poor, has caused the disconnected platform accident of cylinder sleeve often to occur.
Summary of the invention
In order to improve the mechanical property of cylinder sleeve, the resistance to compression of the shoulder lower surface ability of bursting particularly, reduce cylinder sleeve because the inefficacy of the shoulder fracture that assembling is improper and use procedure causes, the invention provides a kind of rolling and processing method, by this processing, can increase fatigue resistance and the routed ability of resistance to compression of cylinder sleeve.
The technical solution adopted for the present invention to solve the technical problems is, after the product cutting processing to its supporting shoulder under the grinding undercut position carry out a kind of special process parameter roll extrusion process.
The invention has the beneficial effects as follows that process by roll extrusion is carried out at the lower relief groove position of the supporting shoulder of cylinder sleeve, the anti-fatigue performance of cylinder sleeve improves, cylinder sleeve fracture failure probability lowers, and improves the work-ing life of product.
Embodiment
The technical solution adopted for the present invention to solve the technical problems is: this marine diesel cylinder liner is through after the precision work, utilize engine lathe or other lathe, cylinder sleeve is assemblied on the axle of lathe spindle, at the close lathe spindle flange of plug, axle will support with the tailstock thimble with shoulder position clamping.The hobboing cutter material adopts GCr15, and between the about 62HRC-65HRC of hardness after the quench treatment, the hobboing cutter surfaceness is not more than Ra 0.8.Cutter diameter get and roll extrusion diameter ratio 1/3-1/2 between.Prevent from weighing wounded and cause shoulder fracture, roll extrusion power is got about 10000 Ns, 60 ° in roll extrusion direction, rolling times 8-12 time, rolling speed 15r/min.Roll extrusion starting point and terminal point must overlap.Surface roughness value after the roll extrusion reduces.Must pass through magnetic-particle inspection by the cylinder sleeve after the roll extrusion processing, prevent that the cylinder sleeve product is owing to the reasons such as roll extrusion crack.
Claims (1)
1. a roll extrusion treatment process is characterized in that: roll extrusion power is got about 10000 Ns, 60 ° in roll extrusion direction, rolling times 8-12 time, rolling speed 15r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110324069 CN103045829A (en) | 2011-10-17 | 2011-10-17 | Rolling treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110324069 CN103045829A (en) | 2011-10-17 | 2011-10-17 | Rolling treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103045829A true CN103045829A (en) | 2013-04-17 |
Family
ID=48058688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110324069 Pending CN103045829A (en) | 2011-10-17 | 2011-10-17 | Rolling treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103045829A (en) |
-
2011
- 2011-10-17 CN CN 201110324069 patent/CN103045829A/en active Pending
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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: 20130417 |