CN101658858A - Cross wedge rolling forming method of hollow shaft head of automobile rear bridge - Google Patents
Cross wedge rolling forming method of hollow shaft head of automobile rear bridge Download PDFInfo
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- CN101658858A CN101658858A CN200910092659A CN200910092659A CN101658858A CN 101658858 A CN101658858 A CN 101658858A CN 200910092659 A CN200910092659 A CN 200910092659A CN 200910092659 A CN200910092659 A CN 200910092659A CN 101658858 A CN101658858 A CN 101658858A
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- hollow shaft
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Abstract
The invention provides a cross wedge rolling forming method of a hollow shaft head blank of an automobile rear bridge, belonging to the technical field of metal plastic shaping. The forming method comprises the steps of heating a round seamless pipe to 800-1100 DEG C, penetrating a core rod in the pipe, and sending the pipe with the core rod between two roll type moulds through an axial pushing device. The module has two pairs of wedges, the pipe is rolled firstly under the action of the first pair of wedges and then pushed to the second pair of wedges through the axial pushing device; when the module rotates for the second turn, the axial automatic positioning of a rolled piece is realized by the initial segment of the second pair of wedges, and then the whole rolled piece is formed by rolling; and the production of one hollow shaft head blank of an automobile rear bridge is finished every two turns. The cross wedge rolling forming method has the advantages of high productivity effectand material utilization rate, small machining allowance, low equipment manufacturing cost and good production environment.
Description
Technical field
The invention belongs to the metal forming technical field, a kind of method of cross wedge rolling forming truck back axle hollow shaft head blank is provided especially, be applicable to the production of the rolling hollow shaft class of cross wedge rolling cored bar blank.
Technical background
As shown in Figure 1, hollow shaft head of automobile rear bridge is one of strength member of automobile, in the vehicle driving process be bearing part be again force transmission element, directly affect the Acceptable life of security, load and the automobile of car load.
All truck axle housings all are to produce with Forging Technology with hollow shaft head basically both at home and abroad.Cross wedge rolling is the advanced technologies that axial workpiece is shaped, and main rolling solid shafting is at present used lessly on hollow shaft, and only limits to the hollow shaft of inwall conformal.And the back axle hollow shaft head requires the internal diameter approximately equal, and this just needs the rolling internal diameter with the control rolled piece of cored bar, when making rolled piece outside under the wall pressure, forces wall thickness reduction.Because the main distortion of cross wedge rolling is a radial compression, extend axially, the hollow shaft of cored bar was both pind down unlike the solid member lateral flow in the operation of rolling, also can be to internal flow unlike hollow conformal spare.When the radial compression amount with extend axially flux matched badly, metal is easy to lateral flow, causes bigger ellipse, causes the operation of rolling to cut off or can not get qualified part.Because problems such as flattening appear in the operation of rolling especially easily, the parameter area of mould and rolling solid member difference are very big, and especially the value of broadening angle significantly reduces, and cause adopting the method mould diameter of common individual pen cross wedge rolling will reach 2000mm, equipment and investment are all very big, performance difficulty.
Summary of the invention
The object of the present invention is to provide a kind of cross wedge rolling roll-forming method of truck back axle hollow shaft head blank.
The present invention is a kind of method of cross wedge rolling forming hollow shaft head of automobile rear bridge blank, earlier seamless steel pipe is heated to 800～1100 ℃, penetrates plug, by axial material-pulling device it is sent into the first secondary pass between two moulds; The steel pipe of cored bar is done gyration under the effect of the first secondary wedge, with the mid portion roll forming of rolled piece, vertically rolled piece is pushed the second secondary pass again, and the second secondary wedge participates in roll forming during mould rotation second circle; When rolled piece enters the second secondary pass by the first secondary pass, in order to guarantee workpiece measurement, between positioning area long about the initial period of second secondary wedge design 200mm---the L section, the cooperation on the inclined-plane by first secondary wedge is rolling when the finishing rolled piece two ends and the forming angle inclined-plane of the second secondary wedge realizes axially location automatically; Finish the hollow shaft head blank of shaping and between two moulds, release, eject plug by axial material-pulling device; Per two circles are finished the rolling of a hollow shaft head blank; Mould forming wedge angle α value α=25～50 °, broadening angle β value β=2～6 °.
Another technical scheme of the present invention be hollow shaft head of automobile rear bridge roll forming process at a cross wedge rolling machine, a secondary mould, finish continuously on the two secondary wedges.
The cross wedge rolling forming method that another technical scheme of the present invention is described hollow shaft head of automobile rear bridge blank is applicable to two rollers and the rolling hollow axial workpiece of the three-roll-wedge transverse rolling one above cored bar of circle.
Adopt cross wedge rolling to produce hollow shaft head and traditional forging method comparison, advantage is:
1) operation is few, production efficiency is high.Forging method will pass through multiple working procedure, a plurality of station forging and moldings, and the cross wedge rolling method needs only a station roll forming, production efficiency is high more than 3 times;
2) stock utilization height.Cross wedge rolling forming can obtain accurate step shape and size, and every part raw material are reduced to about 25 kilograms from 42 kilograms;
3) machining allowance is little.Machining allowance has reduced 60%～70%;
4) equipment manufacturing cost is low.Equipment manufacturing cost has only 1/3rd of forging equipment;
5) production environment is good.Do not have and impact, low noise is easy to realize mechanization, automated production.
The method of cross wedge rolling hollow shaft two cycle roll-forming and common individual pen are shaped to compare to have and significantly reduce mould diameter, alleviate weight of equipment, reduce the advantage of equipment manufacturing cost and die cost, and structure and technology is simple, stable processing technique is good.
Description of drawings:
Fig. 1 is a hollow shaft head of automobile rear bridge cross wedge rolling blank drawing of the present invention.
Fig. 2 is a hollow shaft head of automobile rear bridge cross wedge rolling blank profile of the present invention.
Fig. 3 is the graphics of rolled piece of the present invention when the mould first secondary wedge is rolling, the 1st, and top roll, the 2nd, lower roll, the 3rd, rolled piece, the 4th, plug.
Fig. 4 is the graphics of rolled piece of the present invention when the mould second secondary wedge is rolling, the 5th, and rolled piece.
Fig. 5 is a mould expanded view of the present invention.The 6th, former blank, 7 is first width of cloth groove rolling rolled pieces when finishing, and 8 is first secondary wedges, and 9 is second secondary wedges.
Fig. 6 is mould flute profile figure of the present invention.
Fig. 7 is the A-A section of mould expanded view 5 of the present invention.
Fig. 8 is the B-B section of mould expanded view 5 of the present invention.
The specific embodiment
The present invention utilizes more small-sized equipment and investment, realizes the economization production of automobile hollow shaft head blank (as Fig. 1,2).
Embodiment 1:
Adopt Wedge cross-rolling two cycle roll-forming technology, processing two secondary wedges are to finish the rolling of hollow shaft head on a secondary roll-type mould.Seamless steel pipe is heated to 950 ℃, penetrates plug, the difference of diameter of mandrel and pipe diameter is not more than 1mm, by axial material-pulling device it is sent into the first secondary pass between two moulds.The steel pipe of cored bar is done gyration under the effect of the first secondary wedge, with the mid portion roll forming of rolled piece, as shown in Figure 3.Vertically rolled piece is pushed the second secondary pass again, the second secondary wedge participates in roll forming during mould rotation second circle, as shown in Figure 4.Finish the hollow shaft head blank of shaping and between two moulds, release, eject plug, obtain the hollow shaft head of automobile rear bridge blank shown in Fig. 1,2 by axial material-pulling device.Two circle forming processes of hollow shaft head blank are finished on a cross wedge rolling machine, a secondary mould, two secondary wedges.
Fig. 5, Fig. 6 are the mould expanded view and the flute profile figure of cross wedge rolling forming truck back axle hollow shaft head blank embodiment, and the mould outside diameter circle is Φ 1000mm, forming angle α=40 °, broadening angle β=3.1 °.Blank external diameter Φ 114mm, internal diameter Φ 60mm, cutting length 430mm.When rolled piece enters the second secondary pass by the first secondary pass, in order to guarantee the rolled piece axial dimension, between the long positioning area of the initial period design 200mm of the second secondary wedge---the L section.During the rolling end of first lap, the bevel angle that the rolled piece two ends are shaped equates with the forming angle of the second secondary wedge.There was bigger gap on the forming angle inclined- plane 12,13 of rolled piece inclined- plane 10,11 and wedge when the L section began, as shown in Figure 7, along with wedge increases broadening, as long as there is the inclined-plane of a side to enter contact, must apply axial force to rolled piece, make the rolled piece adjustable axle, on the inclined-plane of both sides all contacts just when the L section finishes to the position, as shown in Figure 8, the axial location of rolled piece is promptly decided.The second secondary pass only relates to the step that is not shaped fully.
Embodiment 2:
Adopt Wedge cross-rolling two cycle roll-forming technology, processing two secondary wedges are to finish the rolling of hollow shaft head on a secondary roll-type mould.Seamless steel pipe is heated to 1100 ℃, penetrates plug, the difference of diameter of mandrel and pipe diameter is not more than 1mm, by axial material-pulling device it is sent into the first secondary pass between two moulds.The steel pipe of cored bar is done gyration under the effect of the first secondary wedge, with the mid portion roll forming of rolled piece, as shown in Figure 3.Vertically rolled piece is pushed the second secondary pass again, the second secondary wedge participates in roll forming during mould rotation second circle, as shown in Figure 4.Finish the hollow shaft head blank of shaping and between two moulds, release, eject plug, obtain the hollow shaft head of automobile rear bridge blank shown in Fig. 1,2 by axial material-pulling device.Two circle forming processes of hollow shaft head blank are finished on a cross wedge rolling machine, a secondary mould, two secondary wedges.
Fig. 5, Fig. 6 are the mould expanded view and the flute profile figure of cross wedge rolling forming truck back axle hollow shaft head blank embodiment, and the mould outside diameter circle is Φ 1400mm, forming angle α=25 °, broadening angle β=2 °.Blank external diameter Φ 114mm, internal diameter Φ 60mm, cutting length 430mm.When rolled piece enters the second secondary pass by the first secondary pass, in order to guarantee the rolled piece axial dimension, between positioning area long about the initial period design 200mm of the second secondary wedge---the L section.During the rolling end of first lap, the bevel angle that the rolled piece two ends are shaped equates with the forming angle of the second secondary wedge.There was bigger gap on the forming angle inclined- plane 12,13 of rolled piece inclined- plane 10,11 and wedge when the L section began, as shown in Figure 7, along with wedge increases broadening, as long as there is the inclined-plane of a side to enter contact, must apply axial force to rolled piece, make the rolled piece adjustable axle, on the inclined-plane of both sides all contacts just when the L section finishes to the position, as shown in Figure 8, the axial location of rolled piece is promptly decided.The second secondary pass only relates to the step that is not shaped fully.
Embodiment 3:
Adopt Wedge cross-rolling two cycle roll-forming technology, processing two secondary wedges are to finish the rolling of hollow shaft head on a secondary roll-type mould.Seamless steel pipe is heated to 800 ℃, penetrates plug, the difference of diameter of mandrel and pipe diameter is not more than 1mm, by axial material-pulling device it is sent into the first secondary pass between two moulds.The steel pipe of cored bar is done gyration under the effect of the first secondary wedge, with the mid portion roll forming of rolled piece, as shown in Figure 3.Vertically rolled piece is pushed the second secondary pass again, the second secondary wedge participates in roll forming during mould rotation second circle, as shown in Figure 4.Finish the hollow shaft head blank of shaping and between two moulds, release, eject plug, obtain the hollow shaft head of automobile rear bridge blank shown in Fig. 1,2 by axial material-pulling device.Two circle forming processes of hollow shaft head blank are finished on a cross wedge rolling machine, a secondary mould, two secondary wedges.
Fig. 5, Fig. 6 are the mould expanded view and the flute profile figure of cross wedge rolling forming truck back axle hollow shaft head blank embodiment, and the mould outside diameter circle is Φ 800mm, forming angle α=50 °, broadening angle β=6 °.Blank external diameter Φ 114mm, internal diameter Φ 60mm, cutting length 430mm.When rolled piece enters the second secondary pass by the first secondary pass, in order to guarantee the rolled piece axial dimension, between positioning area long about the initial period design 200mm of the second secondary wedge---the L section.During the rolling end of first lap, the bevel angle that the rolled piece two ends are shaped equates with the forming angle of the second secondary wedge.There was bigger gap on the forming angle inclined- plane 12,13 of rolled piece inclined- plane 10,11 and wedge when the L section began, as shown in Figure 7, along with wedge increases broadening, as long as there is the inclined-plane of a side to enter contact, must apply axial force to rolled piece, make the rolled piece adjustable axle, on the inclined-plane of both sides all contacts just when the L section finishes to the position, as shown in Figure 8, the axial location of rolled piece is promptly decided.The second secondary pass only relates to the step that is not shaped fully.
Claims (3)
1. the cross wedge rolling forming method of a hollow shaft head of automobile rear bridge is characterized in that: seamless steel pipe is heated to 800～1100 ℃, penetrates plug, by axial material-pulling device it is sent into the first secondary pass between two moulds; The steel pipe of cored bar is done gyration under the effect of the first secondary wedge, with the mid portion roll forming of rolled piece, vertically rolled piece is pushed the second secondary pass again, and the second secondary wedge participates in roll forming during mould rotation second circle; When rolled piece enters the second secondary pass by the first secondary pass, in order to guarantee workpiece measurement, between positioning area long about the initial period of second secondary wedge design 200mm--the L section, the cooperation on the inclined-plane by first secondary wedge is rolling when the finishing rolled piece two ends and the forming angle inclined-plane of the second secondary wedge realizes axially location automatically; Finish the hollow shaft head blank of shaping and between two moulds, release, eject plug by axial material-pulling device; Per two circles are finished the rolling of a hollow shaft head blank; Mould forming wedge angle α value α=25～50 °, broadening angle β value β=2～6 °.
2. according to the cross wedge rolling forming method of right 1 described a kind of hollow shaft head of automobile rear bridge, it is characterized in that: hollow shaft head of automobile rear bridge roll forming process is finished on the two secondary wedges continuously at a cross wedge rolling machine, a secondary mould.
3. according to the cross wedge rolling forming method of right 1 described a kind of hollow shaft head of automobile rear bridge, it is characterized in that: the cross wedge rolling forming method of described hollow shaft head of automobile rear bridge blank is applicable to two rollers and the rolling hollow axial workpiece of the three-roll-wedge transverse rolling one above cored bar of circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100926593A CN101658858B (en) | 2009-09-16 | 2009-09-16 | Cross wedge rolling forming method of hollow shaft head of automobile rear bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100926593A CN101658858B (en) | 2009-09-16 | 2009-09-16 | Cross wedge rolling forming method of hollow shaft head of automobile rear bridge |
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| CN101658858A true CN101658858A (en) | 2010-03-03 |
| CN101658858B CN101658858B (en) | 2011-04-20 |
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| CN2009100926593A Expired - Fee Related CN101658858B (en) | 2009-09-16 | 2009-09-16 | Cross wedge rolling forming method of hollow shaft head of automobile rear bridge |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102501000A (en) * | 2011-09-28 | 2012-06-20 | 南阳市红阳锻造有限公司 | Precision forming process for rim supporting shafts of engineering machinery and heavy-duty trucks |
| CN102744262A (en) * | 2012-07-02 | 2012-10-24 | 宁波大学 | Method for restraining axial floating of transverse wedge rolling unsymmetrical shaft part |
| CN103252433A (en) * | 2013-05-28 | 2013-08-21 | 安徽工业大学 | Device and method for rolling forming of spindle nose of vehicle axle of semi-trailer difficult to form |
| CN103521522A (en) * | 2013-10-14 | 2014-01-22 | 北京科技大学 | Cross wedge rolling precision forming method of axle shaft sleeve |
| CN104841821A (en) * | 2015-05-15 | 2015-08-19 | 北京科技大学 | Small-diameter hollow blank transverse rolling precision forming method of mandril control |
| CN105945200A (en) * | 2016-06-25 | 2016-09-21 | 山东汇锋传动股份有限公司 | Assembling die for transverse rolled preformed blank of gearbox output shaft |
| CN108144965A (en) * | 2018-01-04 | 2018-06-12 | 湖州中杭轧辊有限公司 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
| CN110114166A (en) * | 2017-02-15 | 2019-08-09 | 联邦摩高气门机构公司 | Method for Regularity of Workpiece of Cross Wedge Rolling disc valve |
| CN113787159A (en) * | 2021-07-26 | 2021-12-14 | 北京科技大学 | Cross wedge rolling combined die of railway vehicle axle and forming method thereof |
| CN114905235A (en) * | 2022-04-19 | 2022-08-16 | 杭州正元齿轮制造有限公司 | Forging forming process for triple gear |
-
2009
- 2009-09-16 CN CN2009100926593A patent/CN101658858B/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102501000A (en) * | 2011-09-28 | 2012-06-20 | 南阳市红阳锻造有限公司 | Precision forming process for rim supporting shafts of engineering machinery and heavy-duty trucks |
| CN102501000B (en) * | 2011-09-28 | 2014-04-02 | 南阳市红阳锻造有限公司 | Precision forming process for rim supporting shafts of engineering machinery and heavy-duty trucks |
| CN102744262B (en) * | 2012-07-02 | 2014-12-24 | 宁波大学 | Method for restraining axial floating of transverse wedge rolling unsymmetrical shaft part |
| CN102744262A (en) * | 2012-07-02 | 2012-10-24 | 宁波大学 | Method for restraining axial floating of transverse wedge rolling unsymmetrical shaft part |
| CN103252433A (en) * | 2013-05-28 | 2013-08-21 | 安徽工业大学 | Device and method for rolling forming of spindle nose of vehicle axle of semi-trailer difficult to form |
| CN103521522B (en) * | 2013-10-14 | 2015-06-10 | 北京科技大学 | Cross wedge rolling precision forming method of axle shaft sleeve |
| CN103521522A (en) * | 2013-10-14 | 2014-01-22 | 北京科技大学 | Cross wedge rolling precision forming method of axle shaft sleeve |
| CN104841821A (en) * | 2015-05-15 | 2015-08-19 | 北京科技大学 | Small-diameter hollow blank transverse rolling precision forming method of mandril control |
| CN105945200A (en) * | 2016-06-25 | 2016-09-21 | 山东汇锋传动股份有限公司 | Assembling die for transverse rolled preformed blank of gearbox output shaft |
| CN110114166A (en) * | 2017-02-15 | 2019-08-09 | 联邦摩高气门机构公司 | Method for Regularity of Workpiece of Cross Wedge Rolling disc valve |
| CN110114166B (en) * | 2017-02-15 | 2020-06-26 | 联邦摩高气门机构公司 | Method for cross wedge rolling disc valves |
| CN108144965A (en) * | 2018-01-04 | 2018-06-12 | 湖州中杭轧辊有限公司 | A kind of roll and production technology suitable for cross-wedge-rolling shaft part |
| CN113787159A (en) * | 2021-07-26 | 2021-12-14 | 北京科技大学 | Cross wedge rolling combined die of railway vehicle axle and forming method thereof |
| CN114905235A (en) * | 2022-04-19 | 2022-08-16 | 杭州正元齿轮制造有限公司 | Forging forming process for triple gear |
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|---|---|
| CN101658858B (en) | 2011-04-20 |
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Assignee: Hebei Dongan Group Co.,Ltd. Assignor: University of Science and Technology Beijing Contract record no.: 2012990000381 Denomination of invention: Cross wedge rolling forming method of hollow shaft head of automobile rear bridge Granted publication date: 20110420 License type: Exclusive License Open date: 20100303 Record date: 20120604 |
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Change date: 20120906 Contract record no.: 2012990000381 Assignee after: Hebei DongAn Fine Co., Ltd. Assignee before: Hebei Dongan Group Co.,Ltd. |
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Granted publication date: 20110420 Termination date: 20130916 |