CN1907586A - Plate-type wedge rolling precision forming method for camshaft - Google Patents
Plate-type wedge rolling precision forming method for camshaft Download PDFInfo
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- CN1907586A CN1907586A CN 200610112649 CN200610112649A CN1907586A CN 1907586 A CN1907586 A CN 1907586A CN 200610112649 CN200610112649 CN 200610112649 CN 200610112649 A CN200610112649 A CN 200610112649A CN 1907586 A CN1907586 A CN 1907586A
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Abstract
The invention relates to a sheet wedge rolling method of cam axle, wherein said molding method uses two sheet modules with wedge moulds to move with opposite directions; the metal round rod, via the wedge side wall of mould and the curvature top, can continuously radial compress, axially extend and deform, to form the cam axle;' the cam forming process comprises: wedging rolling, extending rolling, fining; and the relative moulds are divided into wedge section, extending section and fining section; the mould surface of molding cam is the envelop surface of cam and mould top surface; the section of mould molding surface has several types. The invention has high producing efficiency, low cost, and high size accuracy.
Description
Technical field:
The invention belongs to the metal forming technical field, a kind of plate-type wedge rolling manufacturing process of camshaft is provided especially.
Technical background:
Cross wedge rolling is a kind of axial workpiece New Forming Process, and its operation principle is: two board-like moulds that have wedge shape mould, move in the opposite direction, drive circular rolled piece reverse rotation, rolled piece under the effect of wedge shape pass, the various multidiameters of roll forming.Its main distortion is that radial compression extends axially.This technology is mainly used in the big axial workpiece of production lot, comprising: axial workpieces such as automobile, tractor, motorcycle, internal combustion engine, hardware ﹠ tools, building machinery.Characteristics such as this technology has efficiently, material-saving, low consumption are the advanced production technologies of saving metal material and energy.Camshaft is widely used in transportation machinery industry such as train, automobile, tractor, motorcycle, but traditional cross wedge rolling can only be produced various concentric revolving body axial workpieces, can't the builder cam axle etc. the non-revolved body axial workpiece.The invention solves the difficult problem of traditional cross wedge rolling, realized comprising the camshaft wedge cross rolling process production of the direct roll forming of cam portion, enlarged the scope of application of cross wedge rolling technique, improve stock utilization, reduce cost, realized that the nearly clean roll forming of cross wedge rolling rolls the scope of application of technology, improve stock utilization, reduce cost, realized the nearly clean roll forming of cross wedge rolling.
Summary of the invention:
The object of the present invention is to provide a kind of plate-type wedge rolling manufacturing process of camshaft, realize comprising camshaft (blank) the cross wedge rolling production technology (referring to Fig. 1) of the direct roll forming of cam portion with the plastic molding method of high efficiency, low energy consumption, high material-saving rate.
Of the present invention constituting: two board-like moulds that have the wedge type mould are done moving movement in opposite directions, the metal circular bar of heating is done gyration under die wedge sidewall and end face effect, realize continuous radial compression, extend axially distortion, being shaped gradually comprises the camshaft of cam.
The cam forming process is divided into wedging roll forming, broadening roll forming and finishing shaping three phases.Dui Ying mould wedge is divided into wedging section, broadening section and Strain During Finishing Stage (referring to Fig. 2) with it.
The pairing mould wedge of builder cam shaft part working face is formed (referring to Fig. 2) by section of mould molding surface and mould template curved surface (end face).Different with tradition shaping revolving body axial workpiece method, the pairing die top of builder cam is not the plane, and its template curved surface is an operation of rolling cam and the relative determined enveloping surface of gripping altogether of motion of gripping altogether of die top.
Setting the cam equation is
Then as the rolling rolling radius r of rolled piece
kDuring for certain value, its template surface equation can be written as:
In the formula:
Wherein γ=0 and γ=π.
Plate-type wedge rolling has upper and lower (or left and right), and two moulds constitute, and γ in the formula=0 o'clock following formula is the template curved surface of a mould, and following formula is the template curved surface of another mould during γ=π.Two die top shapes are the same, but the phase place phase difference of half cycle.
The transversal section configuration of section of mould molding surface has multiple pattern: single forming angle (referring to Fig. 3), two forming angle (referring to Fig. 4), many forming angles, arc forming face (referring to Fig. 5) etc.For single forming angle, 2～10 angle changing forming angles, its shaping angle value α value is in 16 °～60 ° scopes; Its tangent line of arc forming face and axis angle α value are in 0 °～90 ° scopes.Broadening angle β value is in 1 °～12 ° scopes, and broadening angle is meant the angle of mould wedge evolute and mould wedge length of run direction, referring to shown in Figure 9.
The cross wedge rolling forming method of camshaft of the present invention is applicable to plate-type wedge rolling or chain-plate type cross wedge rolling.
The camshaft of indication can include 1～24 cam diameter of axle section in the cross wedge rolling forming method of camshaft of the present invention.
Camshaft of the present invention is meant IC engine camshaft, comprises single cylinder and multi-cylinder camshaft, and camshaft comprises 1～24 cam.
The invention has the advantages that:
Compare the present invention with the forging and molding mode and have following advantage:
1) production efficiency is high 3～10 times;
2) service load descends weight of equipment less than 10% significantly, and increase substantially die life;
3) formation of parts precision height does not have overlap, and the material-saving rate can realize few nothing cutting and part Accurate Shaping more than 20%;
4) the part fibre flow of Cheng Xinging is continuous, and can realize deformation process, and part quality is good;
Do not have when 5) working and impact few noise, easily be automated production, belong to cleaner production etc.
Compare the present invention with traditional cross wedge rolling method and have following advantage:
1) enlarges the cross wedge rolling range of application, realize the production of the cross wedge rolling part of non-revolved body;
2) improve stock utilization.Owing to can directly roll out the camshaft that comprises cam, workpiece measurement is realized near-net-shape more near the final products size;
3) reduce the machining expense.Because workpiece measurement is more near the final products size, amount of machining significantly reduces, even directly grinding gets final product, and obviously reduces the machining expense.
4) good product quality, because camshaft is roll forming, the densification of cam textura epidermoidea, fibr tissue is continuous, so mechanical performance is improved.
Description of drawings:
Fig. 1 is a camshaft schematic diagram of the present invention.
Fig. 2 is the plate-type wedge rolling wedge type schematic diagram of builder cam of the present invention, wherein, and mould forming wedge face 1, mould wedge type curved surface 2.
Fig. 3 is single forming angle schematic diagram of the present invention.
Fig. 4 is many forming angles schematic diagram of the present invention.
Fig. 5 is an arc forming face schematic diagram of the present invention.
Fig. 6 is an example cam contour schematic diagram of the present invention.
Fig. 7 is the mould template curved surface profile figure of builder cam of the present invention, wherein: the movement locus 3 of cam.
Fig. 8 is a builder cam axle schematic diagram of the present invention.
Fig. 9 is the plate-type wedge rolling mould pass schematic diagram of builder cam axle of the present invention.
The specific embodiment
That shown in Figure 9 is one of mould pass figure of plate-type wedge rolling shaping example camshaft (Fig. 8).Blank places between two moulds, and the mould motion drives the blank rotation, and blank is under mould action, and radial compression extends axially, and blank is configured as multidiameter gradually.
The mould template curved surface example of builder cam:
If the cam equation is
Wherein: r
0=15mm, r
1=20mm, r
2=5mm
Each parameter meaning is referring to Fig. 6 in the formula.
The concrete result of calculation of template curved surface such as following table (profile diagram is referring to Fig. 7)
| θ(°) | x(mm) | y(mm) | θ(°) | x(mm) | y(mm) |
| 0 | 0.0 | 15.0 | 95 | 33.561 | 24.517 |
| 15 | 5.236 | 15.0 | 100 | 35.461 | 22.939 |
| 30 | 10.472 | 15.0 | 105 | 36.727 | 21.172 |
| 35 | 12.111 | 15.054 | 110 | 38.405 | 19.578 |
| 40 | 13.763 | 15.218 | 115 | 40.241 | 18.281 |
| 45 | 15.442 | 15.502 | 120 | 42.092 | 17.271 |
| 50 | 17.159 | 15.921 | 125 | 43.907 | 16.499 |
| 55 | 18.925 | 16.499 | 130 | 45.673 | 15.921 |
| 60 | 20.740 | 17.271 | 135 | 47.390 | 15.502 |
| 65 | 22.591 | 18.281 | 140 | 49.069 | 15.218 |
| 70 | 24.427 | 19.578 | 145 | 50.721 | 15.054 |
| 75 | 26.105 | 21.172 | 150 | 52.360 | 15.0 |
| 80 | 27.371 | 22.939 | 180 | 62.832 | 15.0 |
| 85 | 29.271 | 24.517 | 270 | 94.248 | 15.0 |
| 90 | 31.416 | 25.000 | 360 | 125.664 | 15.0 |
Claims (3)
1. the plate-type wedge rolling precision forming method of a camshaft, it is characterized in that: two board-like moulds that have the wedge type mould are done moving movement in opposite directions, the metal circular bar of heating is under section of mould molding surface wedge sidewall and the effect of mould template curved surface end face, realize continuous radial compression, extend axially distortion, be configured as the camshaft that comprises cam gradually; The cam forming process is divided into wedging roll forming, broadening roll forming, finishing shaping three phases, and Dui Ying mould wedge is divided into wedging section, broadening section and Strain During Finishing Stage with it; The pairing mould wedge of builder cam shaft part working face is made up of section of mould molding surface and mould template curved surface end face, and the pairing mould template of builder cam curved surface is that operation of rolling cam is made the relative determined enveloping surface of gripping altogether of motion of gripping altogether with die top; The forming angle of die wedge is the forming angle of single fixed angle, or is made of the forming angle of 2～10 angle changings, and its shaping angle value α value is 16 °～60 °; Or be that a tangential angle continually varying arc forming angle constitutes, its tangent line of arc forming face and axis angle α value are in 0 °～90 ° scopes; The broadening angle span of die wedge is 1 °～12 °, and broadening angle is meant the angle of mould wedge evolute and mould wedge length of run direction.
2. according to right 1 described method, it is characterized in that: the cross wedge rolling forming method of described camshaft is applicable to plate-type wedge rolling or chain-plate type cross wedge rolling.
3. according to right 1 described method, it is characterized in that: described camshaft comprises 1～24 cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101126498A CN100464879C (en) | 2006-08-28 | 2006-08-28 | Plate-type wedge rolling precision forming method for camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101126498A CN100464879C (en) | 2006-08-28 | 2006-08-28 | Plate-type wedge rolling precision forming method for camshaft |
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| Publication Number | Publication Date |
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| CN1907586A true CN1907586A (en) | 2007-02-07 |
| CN100464879C CN100464879C (en) | 2009-03-04 |
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| CNB2006101126498A Expired - Fee Related CN100464879C (en) | 2006-08-28 | 2006-08-28 | Plate-type wedge rolling precision forming method for camshaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489956A (en) * | 2011-12-07 | 2012-06-13 | 北京科技大学 | Blank wedge cross rolling precise blank-forging die-forging forming process for engine camshaft of internal combustion engine |
| CN108927473A (en) * | 2018-08-21 | 2018-12-04 | 上海应用技术大学 | A kind of plate-type wedge rolling mold of ball stud |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850399A (en) * | 2010-05-14 | 2010-10-06 | 付仕忠 | Process method for forging brake cam of automobile |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1469774A (en) * | 1975-03-19 | 1977-04-06 | Mitsubishi Heavy Ind Ltd | Roll-forming |
| JPS60118347A (en) * | 1983-11-30 | 1985-06-25 | Mitsubishi Heavy Ind Ltd | Formation of stepped shaft and its similar shape |
| CN1018053B (en) * | 1988-05-16 | 1992-09-02 | 吉林工业大学 | Wedge cross rolling process for electric step shaft |
| CN1300490C (en) * | 2003-03-12 | 2007-02-14 | 浙江工业大学 | Machining method for symmetrical stepped gear shaft |
| CN100457318C (en) * | 2006-03-03 | 2009-02-04 | 北京科技大学 | Plate type wedge lateral rolling forming method for eccentric step shalf |
-
2006
- 2006-08-28 CN CNB2006101126498A patent/CN100464879C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489956A (en) * | 2011-12-07 | 2012-06-13 | 北京科技大学 | Blank wedge cross rolling precise blank-forging die-forging forming process for engine camshaft of internal combustion engine |
| CN102489956B (en) * | 2011-12-07 | 2013-11-27 | 北京科技大学 | Blank wedge cross rolling precise blank-forging die-forging forming process for engine camshaft of internal combustion engine |
| CN108927473A (en) * | 2018-08-21 | 2018-12-04 | 上海应用技术大学 | A kind of plate-type wedge rolling mold of ball stud |
| CN108927473B (en) * | 2018-08-21 | 2020-04-07 | 上海应用技术大学 | Plate type cross wedge rolling die for ball pin |
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| CN100464879C (en) | 2009-03-04 |
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