CN106623742A - Efficient automobile hollowed-out front axle forging method - Google Patents
Efficient automobile hollowed-out front axle forging method Download PDFInfo
- Publication number
- CN106623742A CN106623742A CN201610431733.XA CN201610431733A CN106623742A CN 106623742 A CN106623742 A CN 106623742A CN 201610431733 A CN201610431733 A CN 201610431733A CN 106623742 A CN106623742 A CN 106623742A
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- Prior art keywords
- die
- front axle
- forging
- upsetting
- steel plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
Abstract
The invention relates to an efficient automobile hollowed-out front axle forging method, and belongs to the technical field of manufacturing of automobile front axles. The efficient automobile hollowed-out front axle forging method is characterized by comprising the following process steps: (1) carrying out roll forging on a heated steel rod by using a roll forging machine to make a blank; (2) bending the roll forging blank in a bending die by using a 500 T press to obtain a front axle blank; (3) forging the front axle blank in a cavity of a pre-forging and finish-forging die by using an electric screw press to obtain a front axle finish-forging blank; (4) carrying out hot trimming on a fin on the periphery of a front axle forge piece in a trimming, upsetting and correcting composite die by using a 2,000 T oil press, and then carrying out upsetting and correcting; and (5) carrying out punching and correcting in a punching and correcting composite die by using a 500 T press. The integral forging speed of the front axle is increased mainly by bending to form a single process, a trimming, upsetting and correcting composite process and a punching and correcting composite process, the fatigue life of the front axle is prolonged, the cost for equipment and dies is reduced, the cost for tools is saved, waste of personnel is avoided, the utilization rate of materials is high, and therefore, the efficient automobile hollowed-out front axle forging method is suitable for producing automobile front axles on a large scale.
Description
Technical field
The invention belongs to automobile front shaft forging technology field.The efficient process for forging of specifically related to a kind of automobile hollow out front axle, forging production efficiency is improved by the combination process such as heating, roller forging sheet stamping, press-bending, hot trimming upsetting flat correction, punching correction in hollow out front axle forging process, reduce steel plate position amount of machining, mitigate front axle weight, improve front axle service life.
Background technology
Front axle is the important safety part of automobile chassis system, using the production technology or roller die forging combination process of hot forging more than the production of front axle.By taking roller die forging combination process as an example, front axle forging technology flow process：Round steel heating → roller forging sheet stamping → press-bending, blocking, finish-forging → hot trimming → thermal recalibration.Front forging shaft basic forming Jing after the pre- finish-forging of bending, in traditional front axle forging technology for the ease of the shaping of steel plate parallactic angle, be easy to withdrawing pattern and devise inside and outside draft angle, outer draft angle be generally 3 degree, interior draft angle be generally 7 degree.Front axle two ends after trimming can with the punching press of core in trimming modification, this moment Gua Tou centers, steel plate position not point-blank, i.e. front axle center line skew.Last procedure is thermal recalibration, because the die cavity of hot straightening mold is according to the appropriate Enlargement Design in front forging shaft local, hot straightening mold ensure that the center line of front axle.In production, have at withdrawing pattern outside the front of steel plate position at the machining allowance of 6-8mm, interior withdrawing pattern has 6-10mm allowance to general front axle, causes the waste of personnel, equipment, cutter, material.The front axle allowance of the technique productions is big, blank is laid particular stress on, forging disalignment amount is big, is not inconsistent with the front forging shaft lightweight energy-saving material-saving development trend that country advocates.
The content of the invention
The forging method that the purpose of the present invention is aiming at above-mentioned weak point and provides a kind of efficient automobile hollow out front axle replaces traditional front axle forging technology, reduce the machining allowance of 8mm and 10mm at the inside and outside withdrawing pattern in steel plate position, reach and exempt from machining state, mitigate front axle weight, improve front axle total quality, improve front axle production efficiency, it is to avoid personnel, equipment, cutter, the waste of material, be adapted to the method that high-volume efficiently produces automobile front axle.
The present invention technical solution be：A kind of efficient automobile hollow out front axle forging method, it is characterised in that comprise the following steps that：
(1) round steel roller forging sheet stamping will be heated using forging roll；
(2) in bending die bent roll forging base using 500T forcing presses axis blank before making；
(3) using electric screw press front axis blank is carried out in pre- finish-forging die die cavity being forged into front axle finish-forging base；
(4) the flat correction of upsetting is carried out after the overlap of front forging shaft periphery being carried out into hot trimming in the flat correcting combined die of trimming upsetting using 2000T hydraulic presses；
(5) correction is punched out in punching correction compound die tool using 500T forcing presses.
Drift described in the technical solution of the present invention is 1-5, is determined according to the hollow out number of automobile front axle.
The angle of inclination of the melon head pressing plate described in the technical solution of the present invention is consistent with automobile front axle melon head tilt angle.
Lower of steel plate position block described in the technical solution of the present invention is arranged on the straightening die of left and right by attaching nut and positioning key, replaceable, and left straightening die is connected with oil cylinder is pushed.
The present invention the（2）Press-bending in step is independent operation, and equipment adopts 500T forcing presses, reduces equipment investment, improves solid forging production efficiency, is improved to 34/hour by 28/hour.
The present invention the（4）The flat correction of front axle trimming upsetting in step uses the flat correcting combined die of a set of trimming upsetting, equipment is 2000T forcing presses, and the flat correcting combined die of trimming upsetting includes other auxiliary accessories such as the first upper bolster, the first die shoe, core in trimming, the trimming edge of a knife, material-pulling device, two steel plate position pressing plates, two melon head pressing plates, four lower of steel plate position blocks, taper pin device, left straightening die, right straightening die, mobile guide block, guide rail, splicing support, promotion oil cylinders；Wherein, core is fixed on the first upper bolster in trimming, the trimming edge of a knife is fixed on the first die shoe by support plate, and the blanking space of certain altitude is left in edge of a knife lower section, facilitate material-pulling device that the front axle for falling is pushed on splicing support, material-pulling device can not be fixed on mould, and steel plate position pressing plate and melon head pressing plate are fixed on the first upper bolster, and four lower of steel plate position blocks are separately fixed on the straightening die of left and right by shape of product；Taper pin device is fixed on the first upper bolster；Right straightening die is fixed on die shoe, and left straightening die is fixed on mobile guide block, and mobile guide block is connected with oil cylinder is promoted, and guide rail is fixed on the first die shoe, and mobile guide block coordinates with guide rail；Promote oil cylinder pushing movement guide block, drive left straightening die movement to form closure state with right straightening die by guide rail and constitute correction station, first upper bolster is pushed, steel plate position pressing plate, melon head pressing plate, taper pin device and left and right straightening die, lower of steel plate position block and front axle is driven to constitute the flat correction station of upsetting, taper pin device is contacted more and more closely with left straightening die during pushing, and during upsetting is flat the tight obvolvent of left and right straightening die is made；Four lower of steel plate position blocks and two steel plate position clamp surface shapes are consistent with the flat design size of the inside and outside draft angle upsetting in steel plate position；Melon head pressing plate angle is consistent with front axle melon brilliance degree.Automobile front axle steel plate position top and bottom are plane after upsetting is flat, exempt from machining.Upsetting is flat using upsetting mode is embraced, and left and right straightening die die cavity is consistent with automobile front axle profile.
The present invention the（5）Front axle punching correction in step is had using a set of punching correction compound die, makes forging shaft before hollow out.Equipment is 500T forcing presses；Punching correction compound die tool includes mould on second, second time mould, drift, drift die holder, spring or ejecting rod of cylinder；Wherein, drift is fixed on the drift die holder of 500T forcing presses；Spring is loaded on spring guide pillar or uses ejecting rod of cylinder, and between mould on second and drift die holder, mould, second time mould and spring or ejecting rod of cylinder constitute punching correction station on second.
The present invention has advanced and creativeness, and it shows：
1. front axle is designed using hollow out loss of weight, mitigates automobile front axle weight.
2. press-bending operation configuration Special purpose pressing machine, lifts solid forging beat, and by 28/hour 34/hour are promoted to.
3. hot trimming, the gentle centreline correction of steel plate position upsetting are carried out to front axle using 2000T hydraulic presses, reduce equipment investment（20%）, save die cost（40%）, mitigate forge weight（8%）, save the cost of charp tool（40%）, reduce cost of labor（20%）.
4. punching correction compound die tool, reduces mould and equipment investment, mitigates forge weight.
Description of the drawings
Fig. 1 is hollow out（2 holes）Front axle schematic diagram.
Fig. 2 is hollow out（3 holes）Front axle schematic diagram.
Fig. 3 is hollow out（5 holes）Front axle schematic diagram.
Fig. 4 is traditional front axle steel plate position schematic diagram.
Fig. 5,6 are the flat correcting combined die schematic cross-section of trimming upsetting.
Fig. 7 is that punching correction compound die has schematic cross-section.
Fig. 8 is the flat rear front axle steel plate position schematic cross-section of upsetting.
Diagram numbering parts title：1. splicing support, 2. push oil cylinder, 3. left straightening die, 4. right straightening die, 5. lower of steel plate position block, 6. taper pin, 7. steel plate position pressing plate, 8. melon head pressing plate, 9. material-pulling device, 10. go up mould, 11. times moulds, 12. drift die holders, 13. drifts, 14. springs, 15. spring guide pillars.
Specific embodiment
Specific embodiment is described in detail below in conjunction with the accompanying drawings.
Fig. 1 to Fig. 3 is respectively the front axle schematic diagram in the hole of hollow out 2,3 holes and 5 holes.The form of front axle hollow out can be " O " type hole, or rectangular opening, or irregular hole etc..The shape of these hollow outs and position are depended primarily on depending on front axle stressing conditions, and this method is applied to the hollow out front axle of form of ownership.
The forging method of efficiently hollow out automobile front axle of the invention is comprised the following steps that.
(1) by round steel after intermediate-frequency heating furnace is heated to 1100-1250 DEG C, round steel roll forging embryo will be heated with forging roll.
(2) in bending die bent the straight embryo of roll forging using 500T forcing presses axis blank before making.
(3) front axis blank is carried out by forging in pre- finish-forging die die cavity using 16000T electric screw press and make front axle finish-forging embryo.
(4) the flat correction of upsetting is carried out after the overlap of front forging shaft periphery being carried out into hot trimming in the flat correcting combined die of trimming upsetting using 2000T hydraulic presses；The flat correcting combined die of trimming upsetting includes the first upper bolster, the first die shoe, two lower of steel plate position of the melon head pressing plate 8, four of steel plate position pressing plate 7, two blocks 5, taper pin device 6, left straightening die 3, right straightening die 4, mobile guide block, guide rail, splicing support 1, promotion oil cylinders 2, as shown in Figure 5, Figure 6；Wherein, steel plate position pressing plate 7 and melon head pressing plate 8, taper pin device 6 are fixed on the first upper bolster, and splicing support 1 is arranged on the first die shoe, and in the middle of left straightening die 3 with right straightening die 4, lower of steel plate position block 5 is separately fixed on left straightening die 3 and right straightening die 4；Right straightening die 4 is fixed on the first die shoe, and left straightening die 3 is connected on mobile guide block, and mobile guide block is connected with oil cylinder 2 is promoted, and guide rail is fixed on the first die shoe, and mobile guide block coordinates with guide rail；Oil cylinder 2 is promoted to promote mobile guide block, drive left straightening die 3 to move by guide rail and form closure state composition correction station with right straightening die 4, first upper bolster is pushed, steel plate position pressing plate 7, melon head pressing plate 8, taper pin device 6 is driven to constitute the flat correction station of upsetting with left and right straightening die, lower of steel plate position block 5 and front axle, taper pin device 6 is contacted more and more closely with left straightening die 3 during pushing, and makes the obvolvent all the time during upsetting is flat of left straightening die 3 and right straightening die 4；Four lower of steel plate position blocks 5 and two surface configurations of steel plate position pressing plate 7 are consistent with the flat design size of the inside and outside draft angle upsetting in steel plate position；The angle of melon head pressing plate 8 is consistent with front axle melon brilliance degree, prevents the upsetting of steel plate position from lifting on front axle stress melon head at ordinary times.Finally forging is transferred to into lower road sequence by manipulator.
Inside and outside at front axle steel plate position draft angle can pass through Fig. 4 and Fig. 8 intuitively find out upsetting it is flat before and after processing capacity difference.
Traditional front axle steel plate position is as shown in Figure 4.The size that part at the front of steel plate position more than " size 17 " requires machining for, machining needs two knives to complete milling flat, and " size 17 " is with down to " size at the back side of steel plate position（62）" similar to triangle region to need mach part, the knife of monolateral needs one to complete, totally four knives are completed.
Front axle steel plate position section is as shown in Figure 8 after pier of the present invention is flat.With respect to the machining allowance that existing process can reduce 8mm and 10mm at the inside and outside withdrawing pattern in steel plate position.
(5) punching correction is carried out on punching correction mould using 500T forcing presses, make forging shaft before hollow out；Punching correction compound die tool includes mould 10 on second, second time mould 11, drift die holder 12, drift 13, spring 14 or ejecting rod of cylinder, spring guide pillar 15, as shown in Figure 7；Wherein, drift 13 is fixed on the drift die holder 12 of 500T forcing presses；Spring 14 is loaded on spring guide pillar 15 or uses ejecting rod of cylinder, and between mould on second 10 and drift die holder 12, mould 10, second time mould 11 and spring 14 or ejecting rod of cylinder constitute punching correction station on second.On second during punching mould 10 and second time mould 11 by front axle obvolvent in die cavity, drift die holder 12 drives drift 13 to continue to push and be punched out, wherein drift 13 is through mould 10 on second, mould 10 is coordinated with drift die holder 12 by spring 14 and spring guide pillar 15 on second, certain volume under pressure is left, is separated by spring 14 or ejecting rod of cylinder drift 13 and front axle when punching back punching head die holder 12 is up.
The invention has the characteristics that：（1）All hollow out front axle models are adapted to, mitigates automobile front axle weight；（2）Improve solid forging speed；（3）Forging's block dimension precision is improved；（4）With the forging that a small amount of equipment and mold input completes complicated front axle；（5）The upsetting of steel plate position is flat to reduce forging machine dosage, saves the cost of charp tool.
Claims (4)
1. a kind of efficient automobile hollow out front axle forging method, it is characterised in that comprise the following steps that：
(1) round steel roller forging sheet stamping will be heated using forging roll；
(2) in bending die bent roll forging base using 500T forcing presses axis blank before making；
(3) using electric screw press front axis blank is carried out in pre- finish-forging die die cavity being forged into front axle finish-forging base；
(4) the flat correction of upsetting is carried out after the overlap of front forging shaft periphery being carried out into hot trimming in the flat correcting combined die of trimming upsetting using 2000T hydraulic presses；The flat correcting combined die of trimming upsetting includes core, the trimming edge of a knife, material-pulling device, two steel plate position pressing plates, two melon head pressing plates, four lower of steel plate position blocks, taper pin device, left straightening die, right straightening die, mobile guide block, guide rail, splicing support and promotion oil cylinders in the first upper bolster, the first die shoe, trimming；Wherein, core is fixed on the first upper bolster in trimming, the trimming edge of a knife is fixed on the first die shoe by support plate, and blanking space is left in edge of a knife lower section, steel plate position pressing plate and melon head pressing plate are fixed on the first upper bolster, and four lower of steel plate position blocks are separately fixed on the straightening die of left and right by shape of product；Taper pin device is fixed on the first upper bolster；Right straightening die is fixed on die shoe, and left straightening die is fixed on mobile guide block, and mobile guide block is connected with oil cylinder is promoted, and guide rail is fixed on the first die shoe, and mobile guide block coordinates with guide rail；Four lower of steel plate position blocks and two steel plate position clamp surface shapes are consistent with the flat design size of the inside and outside draft angle upsetting in steel plate position；Melon head pressing plate angle is consistent with front axle melon brilliance degree；Automobile front axle steel plate position top and bottom are plane after upsetting is flat, exempt from machining.Upsetting is flat using upsetting mode is embraced, and left and right straightening die die cavity is consistent with automobile front axle profile；
(5) correction is punched out in punching correction compound die tool using 500T forcing presses；Punching correction compound die tool includes mould on second, second time mould, drift, drift die holder, spring or ejecting rod of cylinder；Wherein, drift is fixed on the drift die holder of 500T forcing presses；Spring is loaded on spring guide pillar or uses ejecting rod of cylinder, and between mould on second and drift die holder, mould, second time mould and spring or ejecting rod of cylinder constitute punching correction station on second.
2. a kind of efficient automobile hollow out front axle forging method according to claim 1, it is characterised in that：Described drift（13）For 1-5.
3. a kind of efficient automobile hollow out front axle forging method according to claim 1 and 2, it is characterised in that：The angle of inclination of described melon head pressing plate is consistent with automobile front axle melon head tilt angle.
4. a kind of efficient automobile hollow out front axle forging method according to claim 1 and 2, it is characterised in that：Lower of described steel plate position block is arranged on the straightening die of left and right by attaching nut and positioning key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610431733.XA CN106623742B (en) | 2016-06-17 | 2016-06-17 | A kind of efficient automobile hollow out front axle forging method |
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| CN201610431733.XA CN106623742B (en) | 2016-06-17 | 2016-06-17 | A kind of efficient automobile hollow out front axle forging method |
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| CN106623742A true CN106623742A (en) | 2017-05-10 |
| CN106623742B CN106623742B (en) | 2018-11-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107282840A (en) * | 2017-06-21 | 2017-10-24 | 桂林福达重工锻造有限公司 | It is a kind of to realize the mould of preceding forging shaft trimming and two-way finishing shape |
| CN111590004A (en) * | 2020-05-26 | 2020-08-28 | 江苏龙城精锻有限公司 | Manufacturing integral stainless steel oil rail forging and manufacturing process thereof |
| CN111687604A (en) * | 2020-06-19 | 2020-09-22 | 山西中晋工业机械有限公司 | Manufacturing process of front axle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107282840A (en) * | 2017-06-21 | 2017-10-24 | 桂林福达重工锻造有限公司 | It is a kind of to realize the mould of preceding forging shaft trimming and two-way finishing shape |
| CN111590004A (en) * | 2020-05-26 | 2020-08-28 | 江苏龙城精锻有限公司 | Manufacturing integral stainless steel oil rail forging and manufacturing process thereof |
| CN111590004B (en) * | 2020-05-26 | 2022-01-11 | 江苏龙城精锻集团有限公司 | Manufacturing process for manufacturing integral stainless steel oil rail forging |
| CN111687604A (en) * | 2020-06-19 | 2020-09-22 | 山西中晋工业机械有限公司 | Manufacturing process of front axle |
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| Publication number | Publication date |
|---|---|
| CN106623742B (en) | 2018-11-06 |
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