CN105057527A - Method for forging pump body insert of fuel feed pump - Google Patents
Method for forging pump body insert of fuel feed pump Download PDFInfo
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- CN105057527A CN105057527A CN201510423298.1A CN201510423298A CN105057527A CN 105057527 A CN105057527 A CN 105057527A CN 201510423298 A CN201510423298 A CN 201510423298A CN 105057527 A CN105057527 A CN 105057527A
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- forging
- bar
- temperature
- pump housing
- housing lining
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Abstract
The invention discloses a method for forging a pump body insert of a fuel feed pump. The method includes the following steps that a bar is prepared, and a bar steel ingot subjected to electric furnace smelting, external refining and vacuum degassing smelting serves as a raw material; the bar is heated to the forging temperature of 850-900 DEG C, and heat is preserved for 5-8 minutes; and the surface temperature of a casting blank is cooled to 700-800 DEG C, the center of the casting blank is still kept at high temperature, and when the temperature difference between inside and outside reaches 300-350 DEG C, center compaction forging with the total deformation of 6-10% is conducted on the bar. By means of the method, the defects in the prior art are overcome, as process control parameters are reasonably designed, no crack or segregation is generated in the center of the workpiece in the forging process, net carbide can be crushed, and the quality of forged products is improved.
Description
Technical field
The present invention relates to a kind of oil feed pump pump housing lining forging method.
Background technology
Oil feed pump pump housing lining is as important moving component, and designing requirement is high, simultaneously because of oil feed pump operating mode and severe, thus requires very strict to oil feed pump lagging material, dimensional accuracy, surface roughness, heat treatment and surface peening, dynamic balancing etc.Under the condition produced in enormous quantities, traditional handicraft can not meet current design and Production requirement, long-time, run up under, as easy as rolling off a log too early appearances of pump housing lining was lost efficacy or ruptured, and had a strong impact on life-span and whole aircraft reliability.
Summary of the invention
The object of this invention is to provide a kind of oil feed pump pump housing lining forging method, overcome the deficiencies in the prior art, by appropriate design process control parameter, during forging, workpiece heart portion can not crack, the segregation of heart portion and net carbide can smash, and improve forging product quality.
Technical scheme of the present invention is as follows:
A kind of oil feed pump pump housing lining forging method, comprises the following steps:
A, bar prepare, adopt respectively electric furnace smelting, external refining, vacuum degassing smelt bar steel ingot as raw material;
B, bar is heated to forging temperature 850-900 DEG C, insulation 5-8 minute; The surface temperature of strand is down to 700-800 DEG C, and heart portion still keeps high temperature, when internal-external temperature difference reaches 300-350 DEG C, carries out to bar the center compacting forging that total deformation is 6 ~ 10%;
Send in forging mold after c, bar compacting forging, die forging is first through dull and stereotyped die forging, then carries out final die forging again by after the forging stock heating after dull and stereotyped die forging, forms pump housing lining semi-finished product;
D, heat treatment
Pump housing lining after step c forging is heated to 800-850 DEG C and is incubated 1-2h, and oil cooling is to higher than reheating the temperature range to 650 DEG C-700 DEG C after 100 DEG C and being incubated 2-3h, water-cooled afterwards; After temper, again the head of pump housing lining is heated to 400-480 DEG C, insulation 4-5 hour, then misting cooling process, the afterbody of pump housing lining, at 500-650 DEG C, is incubated 1-1.5 hour, then air cooling, heating to temperature in the middle part of last pump housing lining is again 220 ~ 280 DEG C, and insulation 2-3 hour, puts into iron case cooling in heap.
In step b, bar is heated to forging temperature 870 DEG C, is incubated 6.5 minutes; The surface temperature of strand is down to 750 DEG C, and heart portion still keeps high temperature, when internal-external temperature difference reaches 325 DEG C, carries out to bar the center compacting forging that total deformation is 8%.
The present invention is by appropriate design process control parameter, and during forging, workpiece heart portion can not crack, and the segregation of heart portion and net carbide can smash, and improves forging product quality.Correspondingly reduce energy consumption, decrease material consumption and cost input, machining accuracy improves greatly, compared with prior art stock utilization brings up to more than 94% by present 65%, power consumption reduces about 50%, improves work efficiency about 3 times, the good effect highly significant of generation.
Technology for Heating Processing of the present invention, smash column crystal, improve gross segregation, as-cast structure is become as-forged microstructure, and under suitable temperature and pressure, seam internal voids, improve the density of material, ingot casting, through forging, forms fibr tissue, further by rolling, extruding, die forging, makes forging obtain the distribution of rational machine direction.
Mechanics properties testing data of the present invention are as follows:
Tensile strength sigma b (MPa): >=985
Yield strength σ s (MPa): >=905
Percentage elongation δ 5 (%): >=11
Notched bar impact strength α kv (J/cm2): >=68.
Detailed description of the invention
A kind of oil feed pump pump housing lining forging method, comprises the following steps:
A, bar prepare, adopt respectively electric furnace smelting, external refining, vacuum degassing smelt bar steel ingot as raw material;
B, bar is heated to forging temperature 870 DEG C, is incubated 6.5 minutes; The surface temperature of strand is down to 750 DEG C, and heart portion still keeps high temperature, when internal-external temperature difference reaches 325 DEG C, carries out to bar the center compacting forging that total deformation is 8%;
Send in forging mold after c, bar compacting forging, die forging is first through dull and stereotyped die forging, then carries out final die forging again by after the forging stock heating after dull and stereotyped die forging, forms pump housing lining semi-finished product;
D, heat treatment
Pump housing lining after step c forging is heated to 820 DEG C and is incubated 1.5h, reheats the temperature range to 680 DEG C after oil cooling to 80 DEG C and be incubated 2.5h, water-cooled afterwards; After temper, again the head of pump housing lining is heated to 440 DEG C, be incubated 4.5 hours, then misting cooling process, the afterbody of pump housing lining, at 580 DEG C, is incubated 1.2 hours, then air cooling, heating to temperature in the middle part of last pump housing lining is again 250 DEG C, is incubated 2.5 hours, puts into iron case cooling in heap.
Claims (2)
1. an oil feed pump pump housing lining forging method, is characterized in that, comprise the following steps:
A, bar prepare, adopt respectively electric furnace smelting, external refining, vacuum degassing smelt bar steel ingot as raw material;
B, bar is heated to forging temperature 850-900 DEG C, insulation 5-8 minute; The surface temperature of strand is down to 700-800 DEG C, and heart portion still keeps high temperature, when internal-external temperature difference reaches 300-350 DEG C, carries out to bar the center compacting forging that total deformation is 6 ~ 10%;
Send in forging mold after c, bar compacting forging, die forging is first through dull and stereotyped die forging, then carries out final die forging again by after the forging stock heating after dull and stereotyped die forging, forms pump housing lining semi-finished product;
D, heat treatment
Pump housing lining after step c forging is heated to 800-850 DEG C and is incubated 1-2h, and oil cooling is to higher than reheating the temperature range to 650 DEG C-700 DEG C after 100 DEG C and being incubated 2-3h, water-cooled afterwards; After temper, again the head of pump housing lining is heated to 400-480 DEG C, insulation 4-5 hour, then misting cooling process, the afterbody of pump housing lining, at 500-650 DEG C, is incubated 1-1.5 hour, then air cooling, heating to temperature in the middle part of last pump housing lining is again 220 ~ 280 DEG C, and insulation 2-3 hour, puts into iron case cooling in heap.
2. oil feed pump pump housing lining forging method according to claim 1, is characterized in that, in step b, bar is heated to forging temperature 870 DEG C, be incubated 6.5 minutes; The surface temperature of strand is down to 750 DEG C, and heart portion still keeps high temperature, when internal-external temperature difference reaches 325 DEG C, carries out to bar the center compacting forging that total deformation is 8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510423298.1A CN105057527A (en) | 2015-07-20 | 2015-07-20 | Method for forging pump body insert of fuel feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510423298.1A CN105057527A (en) | 2015-07-20 | 2015-07-20 | Method for forging pump body insert of fuel feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105057527A true CN105057527A (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510423298.1A Pending CN105057527A (en) | 2015-07-20 | 2015-07-20 | Method for forging pump body insert of fuel feed pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN105057527A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636891A (en) * | 2016-11-17 | 2017-05-10 | 马鞍山市银鼎机械制造有限公司 | Preparation method of ball milling cast iron for shock resisting railway steel rail |
| CN114210897A (en) * | 2021-12-28 | 2022-03-22 | 扬州志程机械锻造有限公司 | Forging method of high-carbon high-chromium steel forging and forging |
| CN115199530A (en) * | 2022-06-17 | 2022-10-18 | 安徽凯特泵业有限公司 | Pump body bush assembly of constant temperature delivery pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1962177A (en) * | 2006-12-06 | 2007-05-16 | 国营重庆重型铸锻厂 | Method for making hammer stem for forging equipment |
| JP2007301581A (en) * | 2006-05-09 | 2007-11-22 | Sanyo Special Steel Co Ltd | Method for manufacturing forged product |
| CN102380565A (en) * | 2011-11-17 | 2012-03-21 | 江苏金源锻造股份有限公司 | Method for forging large forging |
| CN102989953A (en) * | 2012-08-22 | 2013-03-27 | 昌利锻造有限公司 | Forging method of automotive eccentric shaft |
| CN103042144A (en) * | 2012-09-11 | 2013-04-17 | 昌利锻造有限公司 | Method for forging automobile engine crankshaft |
| CN204171262U (en) * | 2014-04-24 | 2015-02-25 | 上海腾辉锻造有限公司 | A kind of high strength forged shaft |
-
2015
- 2015-07-20 CN CN201510423298.1A patent/CN105057527A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007301581A (en) * | 2006-05-09 | 2007-11-22 | Sanyo Special Steel Co Ltd | Method for manufacturing forged product |
| CN1962177A (en) * | 2006-12-06 | 2007-05-16 | 国营重庆重型铸锻厂 | Method for making hammer stem for forging equipment |
| CN102380565A (en) * | 2011-11-17 | 2012-03-21 | 江苏金源锻造股份有限公司 | Method for forging large forging |
| CN102989953A (en) * | 2012-08-22 | 2013-03-27 | 昌利锻造有限公司 | Forging method of automotive eccentric shaft |
| CN103042144A (en) * | 2012-09-11 | 2013-04-17 | 昌利锻造有限公司 | Method for forging automobile engine crankshaft |
| CN204171262U (en) * | 2014-04-24 | 2015-02-25 | 上海腾辉锻造有限公司 | A kind of high strength forged shaft |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636891A (en) * | 2016-11-17 | 2017-05-10 | 马鞍山市银鼎机械制造有限公司 | Preparation method of ball milling cast iron for shock resisting railway steel rail |
| CN114210897A (en) * | 2021-12-28 | 2022-03-22 | 扬州志程机械锻造有限公司 | Forging method of high-carbon high-chromium steel forging and forging |
| CN115199530A (en) * | 2022-06-17 | 2022-10-18 | 安徽凯特泵业有限公司 | Pump body bush assembly of constant temperature delivery pump |
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Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |