CN103846619A - Precision-forged combined body cold forging process and realization device thereof - Google Patents

Precision-forged combined body cold forging process and realization device thereof Download PDF

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Publication number
CN103846619A
CN103846619A CN201210520881.0A CN201210520881A CN103846619A CN 103846619 A CN103846619 A CN 103846619A CN 201210520881 A CN201210520881 A CN 201210520881A CN 103846619 A CN103846619 A CN 103846619A
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China
Prior art keywords
district
minute
formula
cold
forging
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Pending
Application number
CN201210520881.0A
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Chinese (zh)
Inventor
周友华
周友锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG MEIYATE PRECISION MACHINERY Co Ltd
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ZHEJIANG MEIYATE PRECISION MACHINERY Co Ltd
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Priority to CN201210520881.0A priority Critical patent/CN103846619A/en
Publication of CN103846619A publication Critical patent/CN103846619A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02Die forging; Trimming by making use of special dies ; Punching during forging
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26Methods of annealing
    • C21D1/32Soft annealing, e.g. spheroidising
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/60Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
    • C23C22/62Treatment of iron or alloys based thereon

Abstract

The invention relates to a precision-forged combined body cold forging process and a realization device thereof and belongs to the field of bearing manufacturing techniques. The prior art has the defects of large machining allowance, low efficiency, great material consumption and low performance and precision. The process provided by the invention specifically comprises the following steps: material obtaining, medium-frequency heating, blanking, upsetting, forming, punching, spheroidizing annealing (softening treatment), shot blasting (descaling), lathe machining, phosphorus saponification (surface lubrication), cold forging and finish (lathe) machining. The realization device provided by the invention comprises a punch press, an upper die, a die holder and a lower die, a conical punching head with a step is arranged on the upper die, the upper die is installed on a sliding block of the punch press, the die holder is fixedly installed in a cavity of the punch press right below the sliding block, the lower die is designed to be a hollow sleeve with a ring bulge, and the ring bulge is embedded into the wall of the inner chamber of the die holder. The precision-forged combined body cold forging process and the realization device thereof have the advantages that the machining allowance is small, the efficiency is high, the performance and the precision are high, the material consumption is small, the consumed materials can be decreased by more than 20 percent, the machining is facilitated, and the service life of products can be improved.

Description

A kind of finish forge association's cold-forging technique and implement device thereof
Technical field
The invention belongs to bearing manufacturing technology field, especially relevant with a kind of finish forge association's cold-forging technique and implement device thereof.
Background technology
The inside and outside circle processing technology of traditional conical bearing adopts outer ring reaming inner ring extrusion forming process, and its particular content is as follows: outer ring reaming process: the processing of the clap → reaming → shaping → spheroidizing → ball blast of type (descale) of drawing materials → heating in medium frequency → blanking → jumping-up → jacking → rise → thick (car) processing → essence (car); The cold extrusion shaped step of inner ring: with the processing of the clap → spheroidizing → ball blast of material core → jumping-up → extrusion modling → punching after the jacking of outer ring → thick (car) processing → essence (car).
The forge hot processing technology allowance of above-mentioned employing is large, yield poorly, feed consumption, time-consuming, difficulty of processing is large, precision performance is low, need further machining to improve the precision of product, this production model is day by day difficult to meet high-quality, high accuracy, high efficiency, the low consumed requirement in the industrial production such as current bearing manufacture.For this reason, people imagine best metal forming technique, and it is exactly cold-forging technique, and tool has the following advantages: improve machining accuracy, reduce energy consumption, improve working (machining) efficiency.
Summary of the invention
Object of the present invention is exactly to have for above-mentioned prior art the defect that allowance is large, precision performance is low, provides that a kind of allowance is little, efficiency is high, feed consumption is few, easy processing, performance and high finish forge association cold-forging technique and the implement device thereof of precision.
For this reason, the present invention is by the following technical solutions: a kind of finish forge association cold-forging technique, is characterized in that: described association's Cold Precision Forging Process of Spur concrete steps are as follows: (softening processing) → ball blast (descale) → Vehicle Processing → phospholeum (surface lubrication) → cold forging → essence (car) of drawing materials → heating in medium frequency → blanking → jumping-up → moulding → punching → spheroidizing is processed.
The heating-up temperature that above-mentioned heating in medium frequency operation adopts is positioned at 1140 ± 30 ℃ and is advisable.
Above-mentioned spheroidizing can adopt the mode of isothermal spheroidizing.
Above-mentioned spheroidizing can decompose in following each processing district:
One, intensification 1:I district: 780 ± 10 ℃, 1.6h ± 10 ';
II district: 780 ± 10 ℃, 1.6h ± 10 ';
III district: 780 ± 10 ℃, 1.6h ± 10 ';
Two, insulation 1: IV district: 800 ± 10 ℃, 1.6h ± 10 ';
V district: 800 ± 10 ℃, 1.6h ± 10 ';
Three, cooling 1 (air blast cooling): VI district: 720 ± 10 ℃, 1.0h ± 10 ';
Four, insulation 1: VII district: 720 ± 10 ℃, 1.25h ± 10 ';
VIII district: 720 ± 10 ℃, 1.25h ± 10 ';
Five, cooling 2:IX district is cooling with stove: 2.15h ± 10 ';
X district is cooled to 600 ℃ with stove, 2.15h ± 10 ';
Six, lower the temperature 3:XI district water-cooled to 250-280 ℃, 3.5h ± 10 ';
Above-mentioned phospholeumization can decompose in following each processing district:
I district: degreasing, 60-70 ℃, 5-15 minute; Formula: degreasing agent is watered 5%;
II district: clean normal temperature, 1-2 minute; Formula: clear water;
III district: clean normal temperature, 1-2 minute; Formula: clear water;
IV district: pickling, normal temperature, 10-15 minute; Formula: 10% watery hydrochloric acid;
V district: clean normal temperature, 1-2 minute; Formula: clear water;
VI district: table is adjusted, normal temperature, 3-6 minute; Formula: table is adjusted and is watered 2%;
VII district: clean normal temperature, 1-2 minute; Formula: clear water;
VIII district: phosphatization, 70-90 ℃, 15-30 minute; Formula: bonderite is watered 8%;
IX district: clean normal temperature, 1-2 minute; Formula: clear water;
X district: clean 70-80 ℃, 2-3 minute; Formula: clear water;
XI district: saponification, 70-90 ℃, 2-8 minute; Formula: saponification agent is watered 4%.
A kind of forging apparatus of realizing above-mentioned cold-forging technique, comprise punch press, patrix, die holder and counterdie, patrix is arranged on the slide block of punch press, die holder is packed in the punch press cavity being positioned under slide block, it is characterized in that: on described patrix, be provided with drift, described counterdie is arranged to the hollow sleeve with annular projection, and this annular projection is inlaid on described die holder internal chamber wall.
The taper with step can be arranged in described drift top, adds man-hour when workpiece is placed in this forging apparatus, and drift falls and by this workpiece cold-forge forming.
The finish forge association that described forging apparatus cold extrusion forms is shaped as circular cone tower, and this finish forge association is the sub-assembly that jacket and inner sleeve combines as a whole, and inside and outside cover internal diameter is without machining.
The present invention can reach following beneficial effect: the present invention has improved the dimensional accuracy of part and good surface roughness, the precision of part can reach IT8~IT9 level, surface roughness can reach Ra0.8~Ral.6, the part of gained only has a small amount of fine finishining that needs like this, circular cone inner-outer sleeve internal diameter is all without reprocessing, make allowance little, reduced material consumption; Production efficiency of the present invention is high, its productivity ratio can be up to 30/per minute more than, can be good at production task; The present invention improves mechanical property and the precision of part, can ensure well the quality of part.
Accompanying drawing explanation
Fig. 1 is the partial structurtes generalized section of apparatus of the present invention.
Fig. 2 is the cutaway view of the finish forge association after apparatus of the present invention cold forging completes.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
The concrete steps of technique of the present invention are as follows: (temperature is 1140 ± 30 ℃) → blanking → jumping-up → moulding → punching → spheroidizing of drawing materials → heating in medium frequency (softening processing) → ball blast (descale) → Vehicle Processing → phospholeum (surface lubrication) → cold forging → essence (car) processing.
Spheroidizing can be further divided into following processing district:
One, intensification 1:I district: 780 ± 10 ℃, 1.6h ± 10 ';
II district: 780 ± 10 ℃, 1.6h ± 10 ';
III district: 780 ± 10 ℃, 1.6h ± 10 ';
Two, insulation 1: IV district: 800 ± 10 ℃, 1.6h ± 10 ';
V district: 800 ± 10 ℃, 1.6h ± 10 ';
Three, cooling 1 (air blast cooling): VI district: 720 ± 10 ℃, 1.0h ± 10 ';
Four, insulation 1: VII district: 720 ± 10 ℃, 1.25h ± 10 ';
VIII district: 720 ± 10 ℃, 1.25h ± 10 ';
Five, cooling 2:IX district is cooling with stove: 2.15h ± 10 ';
X district is cooled to 600 ℃ with stove, 2.15h ± 10 ';
Six, lower the temperature 3:XI district water-cooled to 250-280 ℃, 3.5h ± 10 ';
Above-mentioned phospholeumization can decompose in following each processing district:
I district: degreasing, 60-70 ℃, 5-15 minute; Formula: degreasing agent is watered 5%
II district: clean normal temperature, 1-2 minute; Formula: clear water;
III district: clean normal temperature, 1-2 minute; Formula: clear water;
IV district: pickling, normal temperature, 10-15 minute; Formula: 10% watery hydrochloric acid;
V district: clean normal temperature, 1-2 minute; Formula: clear water;
VI district: table is adjusted, normal temperature, 3-6 minute; Formula: table is adjusted and is watered 2%;
VII district: clean normal temperature, 1-2 minute; Formula: clear water;
VIII district: phosphatization, 70-90 ℃, 15-30 minute; Formula: bonderite is watered 8%;
IX district: clean normal temperature, 1-2 minute; Formula: clear water;
X district: clean 70-80 ℃, 2-3 minute; Formula: clear water;
XI district: saponification, 70-90 ℃, 2-8 minute; Formula: saponification agent is watered 4%;
As shown in Figure 1, comprise punch press 5, patrix 1, die holder 4 and counterdie 3 for the forging apparatus of realizing technique of the present invention, on patrix 1, be provided with the tapered punch 2 with step, patrix 1 is arranged on the slide block of punch press 5, die holder 4 is packed in punch press 5 cavitys that are positioned under slide block, and counterdie 3 is arranged to the hollow sleeve with annular projection, and this annular projection is inlaid on described die holder 4 internal chamber walls, add man-hour when workpiece 6 is placed in this forging apparatus, drift falls and by these workpiece 6 cold-forge formings.

Claims (8)

1. a finish forge association cold-forging technique, is characterized in that: described finish forge association cold-forging technique concrete steps are as follows: (softening processing) → ball blast (descale) → Vehicle Processing → phospholeum (surface lubrication) → cold forging → essence (car) processing of drawing materials → heating in medium frequency → blanking → jumping-up → moulding → punching → spheroidizing.
2. according to a kind of finish forge association cold-forging technique described in claim l, it is characterized in that: the heating-up temperature that described heating in medium frequency adopts is positioned at 1140 ± 30 ℃ and is advisable.
3. a kind of finish forge according to claim 1 and 2 association cold-forging technique, is characterized in that: described spheroidizing can adopt the mode of isothermal spheroidizing.
4. a kind of finish forge according to claim 3 association cold-forging technique, is characterized in that: described spheroidizing can decompose in following each processing district:
One, intensification 1:I district: 780 ± 10 ℃, 1.6h ± 10 ';
II district: 780 ± 10 ℃, 1.6h ± 10 ';
III district: 780 ± 10 ℃, 1.6h ± 10 ';
Two, insulation 1: IV district: 800 ± 10 ℃, 1.6h ± 10 ';
V district: 800 ± 10 ℃, 1.6h ± 10 ';
Three, cooling 1 (air blast cooling): VI district: 720 ± 10 ℃, 1.0h ± 10 ';
Four, insulation 1: VII district: 720 ± 10 ℃, 1.25h ± 10 ';
VIII district: 720 ± 10 ℃, 1.25h ± 10 ';
Five, cooling 2: IX district is cooling with stove: 2.15h ± 10 ';
X district is cooled to 600 ℃ with stove, 2.15h ± 10 ';
Six, lower the temperature 3:XI district water-cooled to 250-280 ℃, 3.5h ± 10 '.
5. a kind of finish forge according to claim 4 association cold-forging technique, is characterized in that: described phospholeumization can decompose in following each processing district:
I district: degreasing, 60-70 ℃, 5-15 minute; Formula: degreasing agent is watered 5%;
II district: clean normal temperature, 1-2 minute; Formula: clear water;
III district: clean normal temperature, 1-2 minute; Formula: clear water;
IV district: pickling, normal temperature, 10-15 minute; Formula: 10% watery hydrochloric acid;
V district: clean normal temperature, 1-2 minute; Formula: clear water;
VI district: table is adjusted, normal temperature, 3-6 minute; Formula: table is adjusted and is watered 2%;
VII district: clean normal temperature, 1-2 minute; Formula: clear water;
VIII district: phosphatization, 70-90 ℃, 15-30 minute; Formula: bonderite is watered 8%;
IX district: clean normal temperature, 1-2 minute; Formula: clear water;
X district: clean 70-80 ℃, 2-3 minute; Formula: clear water;
XI district: saponification, 70-90 ℃, 2-8 minute; Formula: saponification agent is watered 4%.
6. realize the forging apparatus of finish forge as claimed in claim 1 association cold-forging technique for one kind, comprise punch press (5), patrix (1), die holder (4) and counterdie (3), patrix (1) is arranged on the slide block of punch press, die holder (4) is packed in punch press (5) cavity being positioned under slide block, it is characterized in that: on described patrix (1), be provided with drift (2), described counterdie (3) is arranged to the hollow sleeve with annular projection, and this annular projection is inlaid on described die holder (4) internal chamber wall.
7. forging apparatus according to claim 6, is characterized in that: the taper with step can be arranged in described drift (2) top.
8. forging apparatus according to claim 7, it is characterized in that: the finish forge association that described forging apparatus cold extrusion forms is shaped as circular cone tower, this finish forge association is the sub-assembly that jacket and inner sleeve combines as a whole, and inside and outside cover internal diameter is without machining.
CN201210520881.0A 2012-12-06 2012-12-06 Precision-forged combined body cold forging process and realization device thereof Pending CN103846619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210520881.0A CN103846619A (en) 2012-12-06 2012-12-06 Precision-forged combined body cold forging process and realization device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210520881.0A CN103846619A (en) 2012-12-06 2012-12-06 Precision-forged combined body cold forging process and realization device thereof

Publications (1)

Publication Number Publication Date
CN103846619A true CN103846619A (en) 2014-06-11

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104308473A (en) * 2014-09-25 2015-01-28 徐州徐工液压件有限公司 Processing method of local-reinforcement type full fiber cylinder barrel of hydraulic cylinder
CN104827249A (en) * 2015-04-30 2015-08-12 湖州哈特贝尔精密锻造有限公司 Hole shrinkage process for bearing ring
CN105057998A (en) * 2015-08-25 2015-11-18 重庆创精温锻成型有限公司 Manufacturing method for precisely-forged blank of outer input shaft II of automatic dual clutch transmission (DCT) of automobile
CN105156635A (en) * 2015-06-30 2015-12-16 山东温岭精锻科技有限公司 Differential shell and forging process and forging equipment thereof
CN106001341A (en) * 2016-06-17 2016-10-12 宾科汽车紧固件(昆山)有限公司 Cold forging process for rotor and reverse hole extrusion die
CN106111874A (en) * 2016-07-14 2016-11-16 江苏保捷精锻有限公司 A kind of processing method of automobile-use bearing forging
CN110549079A (en) * 2019-09-24 2019-12-10 杭州万鼎实业有限公司 Preparation process of grain streamline high-precision matching bearing outer ring

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CN1851281A (en) * 2006-05-25 2006-10-25 杭州友谐冷精锻技术有限公司 Cold fine forging process for automobile bearing innerand outer ring, and its forging die
WO2008151399A1 (en) * 2007-06-14 2008-12-18 Gabriel Abuhab Hot, cold or warm forging process for forming hollow metallic parts and associated punch
CN101342566A (en) * 2008-08-25 2009-01-14 江苏创一精锻有限公司 Integral cold forging technique for angular wheel shaft
CN201239774Y (en) * 2008-08-01 2009-05-20 上海东芙冷锻制造有限公司 Closed forging die for cold-forging gear sleeve
CN101579800A (en) * 2009-06-12 2009-11-18 大丰市中德精锻件有限公司 Warm/cold forging process for precision forgings with integrated long shafts and inner ball cages
JP2009279611A (en) * 2008-05-22 2009-12-03 Nsk Ltd Method for manufacturing cylindrical ring member
CN102294570A (en) * 2010-06-22 2011-12-28 刘发扬 Process for producing cold forged bearing blank
CN202894175U (en) * 2012-12-06 2013-04-24 浙江美亚特精密机械有限公司 Precise forging combined body cold forging device

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Publication number Priority date Publication date Assignee Title
CN1851281A (en) * 2006-05-25 2006-10-25 杭州友谐冷精锻技术有限公司 Cold fine forging process for automobile bearing innerand outer ring, and its forging die
WO2008151399A1 (en) * 2007-06-14 2008-12-18 Gabriel Abuhab Hot, cold or warm forging process for forming hollow metallic parts and associated punch
JP2009279611A (en) * 2008-05-22 2009-12-03 Nsk Ltd Method for manufacturing cylindrical ring member
CN201239774Y (en) * 2008-08-01 2009-05-20 上海东芙冷锻制造有限公司 Closed forging die for cold-forging gear sleeve
CN101342566A (en) * 2008-08-25 2009-01-14 江苏创一精锻有限公司 Integral cold forging technique for angular wheel shaft
CN101579800A (en) * 2009-06-12 2009-11-18 大丰市中德精锻件有限公司 Warm/cold forging process for precision forgings with integrated long shafts and inner ball cages
CN102294570A (en) * 2010-06-22 2011-12-28 刘发扬 Process for producing cold forged bearing blank
CN202894175U (en) * 2012-12-06 2013-04-24 浙江美亚特精密机械有限公司 Precise forging combined body cold forging device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104308473A (en) * 2014-09-25 2015-01-28 徐州徐工液压件有限公司 Processing method of local-reinforcement type full fiber cylinder barrel of hydraulic cylinder
CN104308473B (en) * 2014-09-25 2016-05-25 徐州徐工液压件有限公司 The processing method of the full fiber Barrel of Hydraulic Cylinders of local strengthening
CN104827249A (en) * 2015-04-30 2015-08-12 湖州哈特贝尔精密锻造有限公司 Hole shrinkage process for bearing ring
CN105156635A (en) * 2015-06-30 2015-12-16 山东温岭精锻科技有限公司 Differential shell and forging process and forging equipment thereof
CN105057998A (en) * 2015-08-25 2015-11-18 重庆创精温锻成型有限公司 Manufacturing method for precisely-forged blank of outer input shaft II of automatic dual clutch transmission (DCT) of automobile
CN106001341A (en) * 2016-06-17 2016-10-12 宾科汽车紧固件(昆山)有限公司 Cold forging process for rotor and reverse hole extrusion die
CN106111874A (en) * 2016-07-14 2016-11-16 江苏保捷精锻有限公司 A kind of processing method of automobile-use bearing forging
CN106111874B (en) * 2016-07-14 2018-01-30 江苏保捷精锻有限公司 A kind of processing method of automobile-use bearing forging
CN110549079A (en) * 2019-09-24 2019-12-10 杭州万鼎实业有限公司 Preparation process of grain streamline high-precision matching bearing outer ring

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