CN102825206A - Forging method of balance shaft of engine - Google Patents
Forging method of balance shaft of engine Download PDFInfo
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- CN102825206A CN102825206A CN2012103497290A CN201210349729A CN102825206A CN 102825206 A CN102825206 A CN 102825206A CN 2012103497290 A CN2012103497290 A CN 2012103497290A CN 201210349729 A CN201210349729 A CN 201210349729A CN 102825206 A CN102825206 A CN 102825206A
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Abstract
The invention discloses a forging method of a balance shaft of an engine with low cost, high efficiency and high strength. Isothermal finish forging is adopted in the method, the comprehensive performance of a material part can be improved, the internal density is increased, and the fiber direction is arranged along the shape of the part, so that each index can be met; the strength of the part is improved by over 1.1 times by adopting solid solution treatment and aging treatment; a cleaning and finishing method is adopted to remove a surface oxidation layer, and compared with the appearance obtained by a mechanical processing method, the surface finishing degree of the appearance of the part is greatly improved, and the part with requirements for the appearance size is easily met; and the processing efficiency is greatly improved, the processing cost can be reduced by over 10%, massive valuable material resources can be saved, and the material utilization ratio is improved by over 10% compared with that of a traditional method.
Description
Technical field
The present invention relates to a kind of forging processing method of engine component.
Background technology
Trunnion shaft is the critical component in the auxiliary balance mechanism on automobile engine crankshaft next door, when bent axle rotates, and crankshaft toothed wheel driven equilibrium shaft gear and make the trunnion shaft rotation.At this moment, reciprocal inertia force or its moment of the centrifugal force of the generation of the balance weight on the trunnion shaft or its moment and bent axle generation balance each other.Owing to the effect of trunnion shaft, effectively eliminated the vibration and the noise of engine, improved the comfortableness of taking, increased the durability of automobile and engine.
At present, a kind of forging method of balance shaft of engine employing is: through heating, blocking, finish-forging, side cut, finishing.The shortcoming of this scheme is: need large tonnage pressing machine, energy consumption is big, stock utilization is low, causes the forging cost high.
A kind of main forging method in addition is that at first employing cuts material, this section material is heated again, and processes the trunnion shaft blank through base, molding procedure again; Adopt the minus deviation edger with the burr of excision trunnion shaft blank and the pattern draft of blank two ends then; Trunnion shaft blank after cutting edge carried this blank to be cooled off naturally be transported to Equipment for Heating Processing through conveyer belt heat-treat technology, pass through thermal recalibration, surface treatment procedure again and make.
But forging method operation of the prior art is many, and efficient is low, and cost is high, causes the waste of material.The method of the employing compression casting that has can overcome the problem of waste of material, but the intensity of making the axle part does not reach the serviceability requirement far away.
Summary of the invention
The purpose of this invention is to provide a kind of low cost, high efficiency, the forging method of the balance shaft of engine that intensity is high.
The forging method of balance shaft of engine of the present invention comprises the steps:
(1) forging stock, the intercepting ingot casting is heated to 950～1050 ℃, behind insulation 40～50min, on forging equipment, forges, and earlier to radially compressing pulling, in that axially to compress big and heavy stone thick, is radially compressing pulling more again when forging;
(2) isothermal blocking, heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
(3) isothermal finish forge, its heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
(4) parts behind the finish forge are carried out molten admittedly the processing and Ageing Treatment, wherein, Gu molten the processing is parts to be put into heating furnace be heated to 960～1040 ℃, insulation 20～40min takes out smart base, is seated in the air and cools off; Ageing Treatment is smart base to be put into heating furnace be heated to 260～380 ℃, insulation 4～6h, and then be heated to 280～400 ℃, insulation 1～2h checks its structure and tensile strength then.
Firing rate in said forging stock, blocking, finish forge and the heat treatment process is controlled at 8～9 ℃/min.
Mould in said blocking, the precision forging process is preheated to 680～780 ℃ before forging and pressing.
Adopt above-mentioned forging method, its beneficial effect is: 1) adopt the isothermal finish forge, parts material combination property is improved; Internal density increases; Machine direction satisfies each item index, 2 with the shape layout of parts) adopt solid molten processing and Ageing Treatment can make strength of parts improve more than 1.1 times.3) working (machining) efficiency improves greatly, and processing cost can reduce more than 10%, and can practice thrift a large amount of precious materials resources, and stock utilization improves more than 10% than conventional method.
The specific embodiment
In order to make the forging method of the clearer understanding of those skilled in the art balance shaft of engine of the present invention, describe its technical scheme in detail through the specific embodiment below.
The forging method of balance shaft of engine of the present invention reaches operations such as etching cleaning once more through forging stock, isothermal blocking, etching cleaning, isothermal finish forge, heat treatment; Make the material one-shot forming; And through its internal crystal framework arrange again, refinement; The density and the tensile strength of part interior tissue are strengthened greatly, be applicable to high-strength parts such as balance shaft of engine.
Embodiment 1
The forging method of balance shaft of engine of the present invention comprises the steps:
(1) forging stock, the intercepting ingot casting is heated to 950～1050 ℃, behind insulation 40～50min, on forging equipment, forges, and earlier to radially compressing pulling, in that axially to compress big and heavy stone thick, is radially compressing pulling more again when forging;
(2) isothermal blocking, heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
(3) isothermal finish forge, its heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
(4) parts behind the finish forge are carried out molten admittedly the processing and Ageing Treatment, wherein, Gu molten the processing is parts to be put into heating furnace be heated to 960～1040 ℃, insulation 20～40min takes out smart base, is seated in the air and cools off; Ageing Treatment is smart base to be put into heating furnace be heated to 260～380 ℃, insulation 4～6h, and then be heated to 280～400 ℃, insulation 1～2h checks its structure and tensile strength then.
Firing rate in said forging stock, blocking, finish forge and the heat treatment process is controlled at 8～9 ℃/min.
Mould in said blocking, the precision forging process is preheated to 680～780 ℃ before forging and pressing.
Embodiment 2
The forging method of balance shaft of engine of the present invention comprises the steps:
(1) forging stock, the intercepting ingot casting is heated to 950～1050 ℃, behind insulation 40～50min, on forging equipment, forges, and earlier to radially compressing pulling, in that axially to compress big and heavy stone thick, is radially compressing pulling more again when forging;
(2) isothermal blocking, heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
(3) blank behind the blocking is inserted carry out etching in the cleaning fluid and clean, remove surface oxide layer, wherein; Cleaning fluid adopts the sulfuric acid of mass percent 5～15% and the mixed aqueous solution of hydrochloric acid, adds the kalium carbide of mass percent 1～3%, and rinse liquid temperature is 70～80 ℃;
(4) isothermal finish forge, its heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
(5) will the smart base after Overheating Treatment insert and carry out etching in the cleaning fluid and clean; Remove surface oxide layer, wherein, cleaning fluid is the sulfuric acid of mass percent 5～15% and the mixed aqueous solution of hydrochloric acid; Add the kalium carbide of mass percent 1～3%, rinse liquid temperature is 70～80 ℃.
Embodiment 3
The forging method of balance shaft of engine of the present invention comprises the steps:
(1) forging stock, the intercepting ingot casting is heated to 950～1050 ℃, behind insulation 40～50min, on forging equipment, forges, and earlier to radially compressing pulling, in that axially to compress big and heavy stone thick, is radially compressing pulling more again when forging;
(2) isothermal blocking, heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
(3) blank behind the blocking is inserted carry out etching in the cleaning fluid and clean, remove surface oxide layer, wherein; Cleaning fluid adopts the sulfuric acid of mass percent 5～15% and the mixed aqueous solution of hydrochloric acid, adds the kalium carbide of mass percent 1～3%, and rinse liquid temperature is 70～80 ℃;
(4) isothermal finish forge, its heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
(5) parts behind the finish forge are carried out molten admittedly the processing and Ageing Treatment, wherein, Gu molten the processing is parts to be put into heating furnace be heated to 960～1040 ℃, insulation 20～40min takes out smart base, is seated in the air and cools off; Ageing Treatment is smart base to be put into heating furnace be heated to 260～380 ℃, insulation 4～6h, and then be heated to 280～400 ℃, insulation 1～2h checks its structure and tensile strength then;
(6) will the smart base after Overheating Treatment insert and carry out etching in the cleaning fluid and clean; Remove surface oxide layer, wherein, cleaning fluid is the sulfuric acid of mass percent 5～15% and the mixed aqueous solution of hydrochloric acid; Add the kalium carbide of mass percent 1～3%, rinse liquid temperature is 70～80 ℃.
Adopt above-mentioned forging method, its beneficial effect is: 1) adopt the isothermal finish forge, parts material combination property is improved; Internal density increases; Machine direction satisfies each item index, 2 with the shape layout of parts) adopt solid molten processing and Ageing Treatment can make strength of parts improve more than 1.1 times.3) adopt the method for cleaning and putting in order, remove surface oxide layer, with respect to the profile that machining process obtained, its appearance surfaces fineness has great improvement, and the parts that have appearance and size to require are also very easily met the demands.4) working (machining) efficiency improves greatly, and processing cost can reduce more than 10%, and can practice thrift a large amount of precious materials resources, and stock utilization improves more than 10% than conventional method.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (3)
1. the forging method of a balance shaft of engine is characterized in that, said forging method comprises the steps:
Forging stock, the intercepting ingot casting is heated to 950～1050 ℃, behind insulation 40～50min, on forging equipment, forges, and earlier to radially compressing pulling, in that axially to compress big and heavy stone thick, is radially compressing pulling more again when forging;
Isothermal blocking, heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
Isothermal finish forge, its heating-up temperature are 1150～1250 ℃, and temperature retention time is 40～50min, 1160～1240 ℃ of initial forging temperatures, 750 ℃～790 ℃ of final forging temperatures;
Parts behind the finish forge are carried out molten admittedly the processing and Ageing Treatment, and wherein, Gu molten the processing is parts to be put into heating furnace be heated to 960～1040 ℃, insulation 20～40min takes out smart base, is seated in the air and cools off; Ageing Treatment is smart base to be put into heating furnace be heated to 260～380 ℃, insulation 4～6h, and then be heated to 280～400 ℃, insulation 1～2h.
2. forging method as claimed in claim 1 is characterized in that: the firing rate in said forging stock, blocking, finish forge and the heat treatment process is controlled at 8～9 ℃/min.
3. forging method as claimed in claim 1 is characterized in that: the mould in said blocking, the precision forging process is preheated to 680～780 ℃ before forging and pressing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103497290A CN102825206A (en) | 2012-09-20 | 2012-09-20 | Forging method of balance shaft of engine |
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| CN2012103497290A CN102825206A (en) | 2012-09-20 | 2012-09-20 | Forging method of balance shaft of engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266504A (en) * | 2020-02-13 | 2020-06-12 | 建龙北满特殊钢有限责任公司 | Forging method for reducing bending degree of slender steel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137888A (en) * | 1996-11-13 | 1998-05-26 | Toa Steel Co Ltd | Manufacture of hot forged parts excellent in wear resistance |
| CN101185954A (en) * | 2007-12-19 | 2008-05-28 | 河南中光学集团有限公司 | Aluminum alloy special-shaped member equivalent temperature precision forging technique method |
| US7815750B2 (en) * | 2005-11-28 | 2010-10-19 | Nippon Steel Corporation | Method of production of steel soft nitrided machine part |
| CN102039364A (en) * | 2010-11-12 | 2011-05-04 | 无锡宏达重型锻压有限公司 | Shaping process of fan shaft |
| CN102274921A (en) * | 2011-05-13 | 2011-12-14 | 北京机电研究所 | Method for forming train shaft forgings |
| CN102284670A (en) * | 2011-07-13 | 2011-12-21 | 南阳市红阳锻造有限公司 | Heavy truck balance shaft forging method |
| CN102444573A (en) * | 2010-10-11 | 2012-05-09 | 上海腾辉锻造有限公司 | Manufacturing method of forging pump shaft |
-
2012
- 2012-09-20 CN CN2012103497290A patent/CN102825206A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137888A (en) * | 1996-11-13 | 1998-05-26 | Toa Steel Co Ltd | Manufacture of hot forged parts excellent in wear resistance |
| US7815750B2 (en) * | 2005-11-28 | 2010-10-19 | Nippon Steel Corporation | Method of production of steel soft nitrided machine part |
| CN101185954A (en) * | 2007-12-19 | 2008-05-28 | 河南中光学集团有限公司 | Aluminum alloy special-shaped member equivalent temperature precision forging technique method |
| CN102444573A (en) * | 2010-10-11 | 2012-05-09 | 上海腾辉锻造有限公司 | Manufacturing method of forging pump shaft |
| CN102039364A (en) * | 2010-11-12 | 2011-05-04 | 无锡宏达重型锻压有限公司 | Shaping process of fan shaft |
| CN102274921A (en) * | 2011-05-13 | 2011-12-14 | 北京机电研究所 | Method for forming train shaft forgings |
| CN102284670A (en) * | 2011-07-13 | 2011-12-21 | 南阳市红阳锻造有限公司 | Heavy truck balance shaft forging method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266504A (en) * | 2020-02-13 | 2020-06-12 | 建龙北满特殊钢有限责任公司 | Forging method for reducing bending degree of slender steel |
| CN111266504B (en) * | 2020-02-13 | 2021-09-14 | 建龙北满特殊钢有限责任公司 | Forging method for reducing bending degree of slender steel |
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Application publication date: 20121219 |