CN103341740A - Method for preparing electric power steering system hot precision forging section fork - Google Patents

Method for preparing electric power steering system hot precision forging section fork Download PDF

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CN103341740A
CN103341740A CN 201310211663 CN201310211663A CN103341740A CN 103341740 A CN103341740 A CN 103341740A CN 201310211663 CN201310211663 CN 201310211663 CN 201310211663 A CN201310211663 A CN 201310211663A CN 103341740 A CN103341740 A CN 103341740A
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forging
temperature
time
magnetic powder
bar
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CN103341740B (en
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赵昌德
马祖文
马祖斌
王万珍
郭建春
王波
李曰亮
高朋
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Shandong Jinma Industrial Group Co Ltd
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Shandong Jinma Industrial Group Co Ltd
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Abstract

The invention relates to a method for preparing an electric power steering system hot precision forging section fork. The method comprises the following processing steps of blanking, bar material heating, blank roll forging; forging forming, shot blasting before hardening and tempering, shot blasting after hardening and tempering, first-time magnetic powder inspection, machining and second-time magnetic powder inspection. The hot precision forging section fork is specially developed for an energy-absorption-type passenger vehicle electric power steering system, and has the advantages of being high in mechanical performance, stable, reliable, wide in material source, environment-friendly in machining, and high in performance-cost ratio.

Description

The preparation method of the hot finish forge joint of electric boosting steering system fork
Technical field
The invention belongs to the auto parts machinery machining technology, more particularly, the present invention relates to the preparation method of the hot finish forge joint of a kind of electric boosting steering system fork.
Background technology
At present, the servo steering system that disposes on the passenger car roughly is divided three classes: mechanical-hydraulic servo steering system, electro-hydraulic servo steering system and electric boosting steering system.Adopt different servo steering systems, have different influences for running safety, comfortableness and economy.
At present, best steering is electric boosting steering system in the world.Electric boosted being applied on car and the SUV, electric boosting steering system can be adjusted the power-assisted size according to the speed of a motor vehicle on performance, turn to lightly during low speed, and road feel is clear during high speed, and sense of direction on hand is strong, and be stable; Say to be exactly electricity consumption economically, fuel-efficient indirectly, maintenance cost is low.But passenger car is when suffering positive bump, can the absorption portion Impact energy, thus alleviate driver and the suffered impact of passenger.
Summary of the invention
In order to solve the above-mentioned technical problem that exists in the prior art, the object of the present invention is to provide the production new technique of the hot finish forge joint of a kind of electric boosting steering system fork.Hot finish forge joint fork of the present invention is the exploitation of energy-absorption type passenger car electric boosting steering system steering specially, has the advantage that mechanical performance is good and reliable and stable, material source extensive, environmental protection is handled in processing, cost performance is high.
In order to solve the problems of the technologies described above and realize above-mentioned purpose, the invention provides following technical scheme:
The preparation method of the hot finish forge of a kind of energy-absorption type passenger car electric boosting steering system joint fork is characterized in that comprising following processing step: ball blast → modified → modified ball blast afterwards before the blanking → bar heating → roller forging sheet stamping → forging and molding → modified → first time magnetic powder inspection → machining → magnetic powder inspection second time.
Wherein, in the described bar heating steps, utilize induction heating method that bar is heated to 1225 ± 25 ℃, adopt the temperature of infrared radiation thermometer real-time online detection heating bar, strict control temperature flows material and reaches unanimity with resistance of deformation at 1225 ± 25 ℃; As preferably, the present invention also utilizes on-line monitoring and temperature sorting device, and the data that infrared radiation thermometer is detected pass to converter, will be higher than 1250 ℃ overtemperature material and be lower than 1200 ℃ low temperature material according to the temperature height and select, and enters different material frames.
Wherein, in the described forging and molding step, comprise blocking and finish-forging in sequence; With large tracts of land flame mould drying tool, make die surface be preheating to 120-200 ℃ before forging; Blow away oxide skin in the forging die die cavity with compressed air then; Even release agent spraying is in the forging die die cavity again; Blow off the oxide skin at blank two ends afterwards with compressed air; At last blank is placed on the forging die, opens hotdie forging press and carry out blocking and finish-forging.As preferably, the blocking temperature is 1220 ℃, and final forging temperature is 950 ℃.Above-mentioned Forging Technology can guarantee that the forging streamline is good, the stock utilization height; And can reduce the offsetting amount, guarantee follow-up machined precision.
Wherein, in the ball blast step, adopt crawler type shot-blasting machine ball blast before the described modulation, adopt steel wire cut pill in the shot-blasting machine, double-deck dust-removal cloth-bag.Steel wire cut pill is difficult for pulverizing, and can not increase dust, and through double-deck bag-type dust, the oxide skin that the product surface ball blast falls is fully filtered, and can not fly away in the air.
Wherein, described modified step is carried out in net belt type protective atmosphere continuous oven, handles 5-10 minute at 840-860 ℃ of following constant temperature, 60 ℃ of quenching oil quenching 5-30 seconds, is heated to 625-645 ℃ after the quenching, temper 110-130 minute then.Product surface hardness HB216-245 after the heat treatment, tension is by force 650-800MPa, minimum 430 MPa of yield strength Re, percentage elongation A 〉=16%.The constant temperature that at first carries out in the modified step of the present invention is in short-term handled, workpiece is at high temperature behind overshoot and heat convection, can guarantee that temperature is tending towards identical, when workpiece entered the quenching oil quenching, internal and external temperature all was consistent, and had guaranteed the stable of workpiece quenching quality, not only significantly improved quenching degree, suppress grain growth, but also eliminated internal stress significantly, significantly reduced the deflection after splined hole in the mechanical processing process mills open slot.
Wherein, in the described magnetic powder inspection step, described aqua magnetic flaw detection ink comprises: the antirust agent of the fluorescentmagnetic particle(powder) of 3-5g/L, the dispersant of 0.1-0.5wt% and 0.2-0.5wt%; And the circumferential magnetization electric current is 0.5-0.8 KA, and the longitudinal magnetization electric current is 10-12KA, and magnetizing time is 3s.As preferably, described aqua magnetic flaw detection ink comprises: the sodium dihydrogen phosphate of the fluorescentmagnetic particle(powder) of 3-5g/L, the natrium nitrosum of 0.05-0.1wt%, 0.05-0.1wt%, the silicone defoaming agent of 0.1-0.2wt%, the EDTA disodium of 0.1-0.2wt% and the methenamine of 0.15-0.25wt%.That described aqua magnetcisuspension supernatant liquid has is mobile, good dispersion, suspension time are long, shows that the magnetic trace is highly sensitive, and the workpiece non-corroding phenomenon that finishes of flaw detection.
Wherein said mechanical processing steps is included in face work, boring, bore hole and the chamfer angle technique that carries out on the Digit Control Machine Tool; Mill opening process what square milling machine carried out; The garland key technology of carrying out at vertical spline broaching machine; Plant with Cutter Body Processing with Machining Center.
Wherein, described face work, boring, bore hole, chamfer angle technique are finished at numerically controlled lathe.At first, workpiece is positioned in the turning attachment, guarantees workpiece front end cambered surface contact anchor clamps location cambered surface, compress then; Use facing tool face work thereafter; Use the bit drills bottom outlet then, then boring endoporus shaped hole; And formation chamfering.
Wherein, the described opening step of milling is carried out at square milling machine.Be that milling cutter mills open slot with cutterhead, remove all burrs.
Wherein, adopt vertical spline broaching machine to pull out spline, the process points for attention in the described garland key technology: must clean out anchor clamps locating surface and surface of the work before the each processing of workpiece; After clamping workpiece finishes, check whether reliable whether the workpiece location put in place, clamp; Check that broaching oil cleaning nothing is rotten, broaching speed 4-6 rice/minute, fastening spring φ 4 * φ 30 * 30.
Wherein, in the described Cutter Body Processing with Machining Center step, check before the processing whether workpiece arrives, clamps, parts fixation adds on the anchor clamps for sleeping in, and the workpiece location puts clamping force 25N.m, reliable clamping in place; The rust preventive cutting fluid cleaning does not have rotten, matched proportion density: 5~8%; Utilize milling cutter to mill opening then; Auger shell line bottom outlet; Bore the tapping hole; With boring the dead eye bottom outlet; With boring cutter heavy boring dead eye bottom outlet; Use the countersink spot-facing; And chamfering; Right boring bearing saddle bore, and chamfering; Mill circular arc.
Wherein, in the described secondary magnetic powder inspection step, identical with magnetic powder inspection first time step.
Compared with prior art, the present invention has following beneficial effect:
The present inventor is by carrying out theory analysis to the function of joint fork, material property, process characteristic, mechanical model etc., and repeatedly group experiment research, satisfactorily resolve the problem that exists in the development process and finished preparation method of the present invention, reached the ability of producing in batches.Hot finish forge joint fork by method of the present invention preparation has that the mechanical performance good stable is reliable, material source extensively, processing handles environmental protection, cost performance advantages of higher; By improving temperature, prolonging temperature retention time, improved forging stability in addition, for the precision that improves machining lays the foundation, it is yielding to have solved workpiece, has guaranteed requirement on machining accuracy.
Description of drawings
Fig. 1 is the product structure figure of the hot finish forge joint of electric boosting steering system of the present invention fork.
Fig. 2 is the schematic diagram of on-line monitoring of the present invention and temperature sorting device.
The specific embodiment
As shown in Figure 1, present embodiment relates to the hot finish forge joint of a kind of energy-absorption type passenger car electric boosting steering system fork.The preparation method of described joint fork specifically comprises following processing step: ball blast → modified → modified ball blast afterwards before the blanking → bar heating → roller forging sheet stamping → forging and molding → modified → first time magnetic powder inspection → face work, boring, bore hole, chamfering → mill opening → garland key → Cutter Body Processing with Machining Center → marking → second time magnetic powder inspection → cleaning, drying → packing.
Wherein, in the described blanking step, the product raw material adopt 45 steel of φ 40, because the hot precision forging of product adopts two technologies of a mould, so cutting stock weight is the weight of two forging blanks.Cutting stock weight 1.1 ± 0.02 Kg, the perpendicularity 0.1mm in bar cross section.The effect of weight and the control of cross section perpendicularity: 1. save material, reduce cost; 2. bar is overweight is easy to generate defectives such as folding in the forging and molding process; Defectives such as material appear lacking in bar deficiency easily in the forging and molding process; 3. bar cross section deflection is easy to generate fold defect in forging process.
Wherein, in the described bar heating steps, 1225 ± 25 ℃ of bar heating-up temperatures.For accurate control rod material temperature, reduce energy consumption, this process is taked two aspect measures: 1. adopt the induction furnace heating that the bar efficiency of heating surface is improved, reduce heat exhaustion simultaneously, energy savings reduces discharge amount of exhaust gas; And can make bar homogeneous heating inside and outside heating process, temperature unanimity in the table is avoided overheated, burn-off phenomenon, reduces the bar surface oxidation, makes bar in forging deformation process, inside and outside drag unanimity, and metal flow is smooth and easy, thereby makes the product streamline more intact.2. adopt the temperature of infrared radiation thermometer real-time online detection heating bar, strict control temperature flows material and reaches unanimity with resistance of deformation in 1200-1250 ℃, has guaranteed the uniformity of forging structure property; Utilize accompanying drawing 2 described on-line monitorings and temperature sorting device in addition, the data that infrared radiation thermometer is detected pass to converter, according to the temperature height overtemperature material (being higher than 1250 ℃) and low temperature material (being lower than 1200 ℃) are sub-elected from the left and right sides respectively, enter different material frames, the high temperature material is scrapped processing, and the low temperature material can add heat utilization once again.The overtemperature bar causes that easily top and final forging temperature are higher, thereby makes product integral body or local grain thick, and the plasticity of forging and toughness are reduced, and fatigue behaviour obviously descends.The low temperature bar can cause bar tension, shearing stress or additional potential stress iso-stress bigger in forging deformation process, reduces the moulding of material, thereby too fast in deformation velocity, forging cracked when deformation extent was excessive.In addition, the bar temperature is low excessively, causes metal flow poor, and forging is prone to lack of fill.
Wherein, in the described roller forging sheet stamping step, the bar that heating-up temperature is fit to (300-800 ℃) enters the forging roll guide rail along material guide device, carries out base at forging roll.
Wherein, in the described forging and molding step, comprise blocking, finish-forging and side cut in sequence.Forging and molding adopts the 1000T hotdie forging press to carry out blocking, finish-forging, and the 200T forcing press is cut edge.With the slow mould drying tool of large tracts of land flame, make die surface be preheating to 120-200 ℃ before forging; Blow away oxide skin in the forging die die cavity with compressed air then; Even release agent spraying is in the forging die die cavity again; Blow off the oxide skin at blank two ends afterwards with compressed air; At last blank is placed on the forging die, opens hotdie forging press and carry out blocking, finish-forging.Wherein, the blocking temperature is 1220 ℃, and final forging temperature is 950 ℃.Workpiece with forging and molding is positioned on the edger afterwards, and workpiece must be in place, and determines that profile and the die cavity back opening pressure machine of fitting cuts edge.
Wherein, in the ball blast step, adopt 800Kg crawler type shot-blasting machine ball blast before the described modulation, adopt steel wire cut pill in the shot-blasting machine, double-deck dust-removal cloth-bag.Steel wire cut pill is difficult for pulverizing, and can not increase dust, and through double-deck bag-type dust, the oxide skin that the product surface ball blast falls is fully filtered, and can not fly away in the air.Installation amount: be not more than 1500, device current: 20~28A, ball blast time: 6-9min, shot specification: φ 0.8-1mm steel wire cut pill.
Wherein, in the described modified step; adopt net belt type protective atmosphere continuous oven to carry out modifier treatment, during shove charge workpiece evenly is tiled on the driving-chain, per hour batch is not more than 600Kg; handled 5-10 minute at 840-860 ℃ of following constant temperature; then 60 ℃ of quenching oil quenching 5-30 seconds, product surface hardness HB216-245 after the heat treatment, tension is by force 650-800MPa; minimum 430 MPa of yield strength Re, percentage elongation A 〉=16%.
Wherein, in the ball blast step of described modified back, adopt 800Kg or 200Kg crawler type shot-blasting machine ball blast, adopt steel wire cut pill in the shot-blasting machine, double-deck dust-removal cloth-bag.Steel wire cut pill is difficult for pulverizing, and can not increase dust, and through double-deck bag-type dust, the oxide skin that the product surface ball blast falls is fully filtered, and can not fly away in the air.Product labelling is clear, surperficial flawless, non-scale, no oil residues, does not have defective such as seriously damage.800Kg crawler type shot-blasting machine installation amount: be not more than 1500, device current: 20~28A, ball blast time: 16-20min, shot specification: φ 0.8-1mm steel wire cut pill.200Kg crawler type shot-blasting machine installation amount: be not more than 450, device current: 16~22A, ball blast time: 15-20min, shot specification: φ 0.8-1mm steel wire cut pill.
Wherein, in the described magnetic powder inspection step, can adopt the CJW-3000D magnaflux to detect a flaw.When reaching 2500-3000 spare, the flaw detection number of packages changes the aqua magnetic flaw detection ink.Detected the crackle product, defective is indicated and isolated and deposit.In the described magnetic powder inspection technology, the aqua magnetic flaw detection ink of employing comprises: the fluorescentmagnetic particle(powder) of 3-5g/L, 0.2% dispersant and 0.5% antirust agent; And the circumferential magnetization electric current is 0.5-0.8 KA, and the longitudinal magnetization electric current is 10-12KA, and magnetizing time is 3s.
Wherein, described face work, boring, bore hole, chamfering step are finished at numerically controlled lathe.At first, workpiece is positioned in the turning attachment, guarantees workpiece front end cambered surface contact anchor clamps location cambered surface, compress then; Use facing tool face work thereafter; Use the bit drills bottom outlet then, then boring endoporus shaped hole; And formation chamfering.
Wherein, the described opening step of milling is carried out at square milling machine.Be that milling cutter mills open slot with cutterhead, remove all burrs.
Wherein, adopt vertical spline broaching machine to pull out spline, the process points for attention in the described garland key step: must clean out anchor clamps locating surface and surface of the work before the each processing of workpiece; After clamping workpiece finishes, check whether reliable whether the workpiece location put in place, clamp; Check that broaching oil cleaning nothing is rotten, broaching speed 4-6 rice/minute, fastening spring φ 4 * φ 30 * 30.
Wherein, in the described Cutter Body Processing with Machining Center step, check before the processing whether workpiece arrives, clamps, parts fixation adds on the anchor clamps for sleeping in, and the workpiece location puts clamping force 25N.m, reliable clamping in place; The rust preventive cutting fluid cleaning does not have rotten, matched proportion density: 5~8%; Utilize milling cutter to mill opening then; Auger shell line bottom outlet; Bore the tapping hole; With boring the dead eye bottom outlet; With boring cutter heavy boring dead eye bottom outlet; Use the countersink spot-facing; And chamfering; Right boring bearing saddle bore, and chamfering; Mill circular arc.
Wherein, described marking step adopts the pneumatic marking machine marking.The requirement mark is clear, and the position is accurate.
Wherein, in the described secondary magnetic powder inspection step, can adopt the CJW-3000D magnaflux to detect a flaw.When reaching 2500-3000 spare, the flaw detection number of packages changes the aqua magnetic flaw detection ink.Detected the crackle product, defective is indicated and isolated and deposit.In the described magnetic powder inspection technology, the aqua magnetic flaw detection ink of employing comprises: the fluorescentmagnetic particle(powder) of 3-5g/L, 0.2% dispersant and 0.5% antirust agent; And the circumferential magnetization electric current is 0.5-0.8 KA, and the longitudinal magnetization electric current is 10-12KA, and magnetizing time is 3s.Detected have a crackle product, defective is indicated and isolates and deposit.
Wherein, in the described cleaning, drying step, cleaning agent adopts the 9701-VFMT rust preventive cutting fluid, matched proportion density 7-10% cleans the storehouse temperature and is set at 50 ℃, and oven dry storehouse temperature is set at 120 ℃, the cleaning, drying process time is 16 ± 1min, and the workpiece behind the cleaning, drying is placed on the packaging tray in turn.
Though specific embodiment part elaborates technical scheme of the present invention by embodiment, but those of ordinary skill in the art is to be understood that and can breaking away from the scope disclosed by the invention, can adopt to be equal to and replace or the enforcement of equivalent transformation form.Therefore, protection scope of the present invention is not limited to above-described embodiment, and the embodiment of short of disengaging invention essence all is interpreted as having dropped within protection scope of the present invention.

Claims (10)

1. the preparation method of the hot finish forge joint of energy-absorption type passenger car electric boosting steering system fork is characterized in that comprising following processing step: ball blast → modified → modified ball blast afterwards before the blanking → bar heating → roller forging sheet stamping → forging and molding → modified → first time magnetic powder inspection → machining → magnetic powder inspection second time.
2. preparation method according to claim 1, it is characterized in that: in the described bar heating steps, utilize induction heating method that bar is heated to 1225 ± 25 ℃, adopt the infrared radiation thermometer real-time online to detect the temperature of heating bar, strict control temperature flows material and reaches unanimity with resistance of deformation at 1225 ± 25 ℃.
3. preparation method according to claim 2, it is characterized in that: utilize on-line monitoring and temperature sorting device, the data that infrared radiation thermometer is detected pass to converter, and the overtemperature material that will be higher than 1250 ℃ according to the temperature height is selected with the low temperature material that is lower than 1200 ℃, enters different material frames.
4. according to each described preparation method of claim 1-3, it is characterized in that: in the described forging and molding step, comprise blocking and finish-forging in sequence; With large tracts of land flame mould drying tool, make die surface be preheating to 120-200 ℃ before forging; Blow away oxide skin in the forging die die cavity with compressed air then; Even release agent spraying is in the forging die die cavity again; Blow off the oxide skin at blank two ends afterwards with compressed air; At last blank is placed on the forging die, opens hotdie forging press and carry out blocking and finish-forging.
5. preparation method according to claim 4, it is characterized in that: the blocking temperature is 1220 ℃, final forging temperature is 950 ℃.
6. according to claim 4 or 5 described preparation methods; it is characterized in that: described modified step is carried out in net belt type protective atmosphere continuous oven; handled 5-10 minute at 840-860 ℃ of following constant temperature; then 60 ℃ of quenching oil quenching 5-30 seconds; carry out temper after the quenching; temperature 625-645 ℃, tempering time 110-130 minute.
7. preparation method according to claim 6, it is characterized in that: in the described magnetic powder inspection first time and the step of magnetic powder inspection for the second time, described aqua magnetic flaw detection ink comprises: the antirust agent of the fluorescentmagnetic particle(powder) of 3-5g/L, the dispersant of 0.1-0.5wt% and 0.2-0.5wt%; And the circumferential magnetization electric current is 0.5-0.8 KA, and the longitudinal magnetization electric current is 10-12KA, and magnetizing time is 3s.
8. preparation method according to claim 7, it is characterized in that: described aqua magnetic flaw detection ink comprises: the sodium dihydrogen phosphate of the fluorescentmagnetic particle(powder) of 3-5g/L, the natrium nitrosum of 0.05-0.1wt%, 0.05-0.1wt%, the silicone defoaming agent of 0.1-0.2wt%, the EDTA disodium of 0.1-0.2wt% and the methenamine of 0.15-0.25wt%.
9. preparation method according to claim 8, it is characterized in that: described mechanical processing steps is included in face work, boring, bore hole and the chamfer angle technique that carries out on the Digit Control Machine Tool; Mill opening process what square milling machine carried out; The garland key technology of carrying out at vertical spline broaching machine; Plant with Cutter Body Processing with Machining Center.
10. preparation method according to claim 1, it is characterized in that: adopt two technologies of a mould, the preparation method specifically comprises following processing step: ball blast before the blanking → bar heating → roller forging sheet stamping → forging and molding → modified → modified → modified back ball blast → first time magnetic powder inspection → face work, boring, bore hole, chamfering → mill opening → garland key → Cutter Body Processing with Machining Center → marking → second time magnetic powder inspection → cleaning, drying → packing; Wherein, in the described blanking step, the product raw material adopt 45 steel, in the described bar heating steps, utilize induction heating method that bar is heated to 1225 ± 25 ℃, adopt the temperature of infrared radiation thermometer real-time online detection heating bar, strict control temperature flows material and reaches unanimity with resistance of deformation at 1225 ± 25 ℃; In the described forging and molding step, comprise blocking and finish-forging in sequence; With large tracts of land flame mould drying tool, make die surface be preheating to 120-200 ℃ before forging; Blow away oxide skin in the forging die die cavity with compressed air then; Even release agent spraying is in the forging die die cavity again; Blow off the oxide skin at blank two ends afterwards with compressed air; At last blank is placed on the forging die, opens hotdie forging press and carry out blocking and finish-forging; And the blocking temperature is 1220 ℃, and final forging temperature is 950 ℃; Described modified step is carried out in net belt type protective atmosphere continuous oven, handles 5-10 minute at 840-860 ℃ of following constant temperature, 60 ℃ of quenching oil quenching 5-30 seconds, is heated to 625-645 ℃ after the quenching, temper 110-130 minute then; In the described magnetic powder inspection first time and the step of magnetic powder inspection for the second time, described aqua magnetic flaw detection ink comprises: the sodium dihydrogen phosphate of the fluorescentmagnetic particle(powder) of 3-5g/L, the natrium nitrosum of 0.05-0.1wt%, 0.05-0.1wt%, the silicone defoaming agent of 0.1-0.2wt%, the EDTA disodium of 0.1-0.2wt% and the methenamine of 0.15-0.25wt%; And the circumferential magnetization electric current is 0.5-0.8 KA, and the longitudinal magnetization electric current is 10-12KA, and magnetizing time is 3s; Described mechanical processing steps is included in face work, boring, bore hole and the chamfer angle technique that carries out on the Digit Control Machine Tool; Mill opening process what square milling machine carried out; The garland key technology of carrying out at vertical spline broaching machine; Plant with Cutter Body Processing with Machining Center.
CN201310211663.3A 2013-05-31 2013-05-31 The preparation method of electric boosting steering system hot finish forge joint fork Active CN103341740B (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104330408A (en) * 2014-10-28 2015-02-04 南京化工特种设备检验检测研究所 Antirust non-fluorescent water-based magnetic suspension and preparation method thereof
CN104696379A (en) * 2015-02-10 2015-06-10 山东金马工业集团股份有限公司 Yoke product and preparation method thereof
CN104985401A (en) * 2015-07-06 2015-10-21 浙江美亚特精密机械有限公司 Joint yoke machining method
CN105328414A (en) * 2015-11-16 2016-02-17 重庆建设工业(集团)有限责任公司 Forming method of automotive joint yoke
CN105855799A (en) * 2016-04-21 2016-08-17 昌利锻造有限公司 Machining method of axial joint fork
CN109108194A (en) * 2018-07-24 2019-01-01 许昌中兴锻造有限公司 The heavy novel forging technology of slip shaft yoke
CN109940122A (en) * 2019-03-26 2019-06-28 吉林大学 The split type axle box near-net-shape method of standard EMU
CN111843404A (en) * 2020-07-15 2020-10-30 浙江跃进锻造有限公司 Manufacturing process of automotive steering tie rod arm
CN111843403A (en) * 2020-07-15 2020-10-30 浙江跃进锻造有限公司 Manufacturing process of automobile steering knuckle arm

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104330408A (en) * 2014-10-28 2015-02-04 南京化工特种设备检验检测研究所 Antirust non-fluorescent water-based magnetic suspension and preparation method thereof
CN104696379A (en) * 2015-02-10 2015-06-10 山东金马工业集团股份有限公司 Yoke product and preparation method thereof
CN104985401A (en) * 2015-07-06 2015-10-21 浙江美亚特精密机械有限公司 Joint yoke machining method
CN104985401B (en) * 2015-07-06 2017-12-26 浙江美亚特精密机械有限公司 Section fork processing method
CN105328414A (en) * 2015-11-16 2016-02-17 重庆建设工业(集团)有限责任公司 Forming method of automotive joint yoke
CN105855799A (en) * 2016-04-21 2016-08-17 昌利锻造有限公司 Machining method of axial joint fork
CN109108194A (en) * 2018-07-24 2019-01-01 许昌中兴锻造有限公司 The heavy novel forging technology of slip shaft yoke
CN109940122A (en) * 2019-03-26 2019-06-28 吉林大学 The split type axle box near-net-shape method of standard EMU
CN111843404A (en) * 2020-07-15 2020-10-30 浙江跃进锻造有限公司 Manufacturing process of automotive steering tie rod arm
CN111843403A (en) * 2020-07-15 2020-10-30 浙江跃进锻造有限公司 Manufacturing process of automobile steering knuckle arm

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