CN100509191C - Accurate forming method of multi-vat camshaft cross-wedge blank with wedge shaped stagger convex parts - Google Patents
Accurate forming method of multi-vat camshaft cross-wedge blank with wedge shaped stagger convex parts Download PDFInfo
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- CN100509191C CN100509191C CNB2007100988586A CN200710098858A CN100509191C CN 100509191 C CN100509191 C CN 100509191C CN B2007100988586 A CNB2007100988586 A CN B2007100988586A CN 200710098858 A CN200710098858 A CN 200710098858A CN 100509191 C CN100509191 C CN 100509191C
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- wedge
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Abstract
A multicylinder camshaft rough wedge rolling precision shaping method for the wedge type convex arranged staggeredly, belongs to the metal ductility orming technical field. The wedge rolling techinics is adopted to roll a camshaft rough having 2-20 concave crosspiece steps, and a plurality of wedge type convexes adopting the staggered style arrangement are arranged on the wedge rolling die in a precedence which are unfolded one by one. A finishing section L is arranged between the front wedge end point J and the back wedgingup wedge point K, wherein the length of L generally equals to half of the diameter perimeter when being rolled at the journal concave crosspiece for the front wedge taper rolling piece. When rolling, the bar stock is sent to the wedge rolling mills for rolling after being heated to 1000-1200 DEG C; after the rolling process for the front camshaft journal concave crosspiece is completed, then is the next one, wherein the rolling is processed by the middle of the camshaft to both sides one by one, and one or one pair of camshaft rough product is produced in one rolling period. The advantages are in: avoiding the back wedge is wedged early to generate the sealing material, controlling the diameter of the cam part accurately and advancing the service life of the die.
Description
Technical field
The invention belongs to the metal forming technical field, multi-cylinder engine cam shaft blank (hereinafter to be referred as the cam shaft blank) accurate shaping method for cross rolling wedge that provides a kind of wedge type projection to be staggeredly arranged especially.
Background technology
Fig. 1 is a kind of cam shaft blank of producing with the cross wedge rolling method with a plurality of recessed shelves steps.In the cross wedge rolling forming method of existing cam shaft blank, each wedge type projection of launching one by one by arrangement precedence on the cross wedge rolling die adopts linear bridging type to arrange.In the case, the end point J that plays wedge point K and last wedge type projection (being designated hereinafter simply as preceding wedge) of back one wedge type projection (hereinafter to be referred as the back wedge) has a longitudinal overlap distance.This means that the recessed shelves of leading portion cam journal place is out of shape imperfect tense, the recessed shelves of back segment cam journal have begun distortion, can cause the cam portion diameter to exceed standard and the die wear increasing at the too much material of cam portion shutoff.
Summary of the invention
The objective of the invention is to: the multi-cylinder engine cam shaft blank accurate shaping method for cross rolling wedge that provides a kind of wedge type projection to be staggeredly arranged, the service life that can improve the rolling accuracy and the mould of cam shaft blank.
The present invention realizes in the following manner: with the rolling cam shaft blank with 2～20 recessed shelves steps of cross wedge rolling the time, adopt the formula that staggers to arrange (Fig. 2) by arranging each wedge type projection that precedence launches one by one on the cross wedge rolling die.Promptly rise a Strain During Finishing Stage L is arranged between the wedge point K at preceding wedge end point J and back wedge, the recessed shelves of wedge rolled piece axle journal located to be rolled half of diameter girth before the length of L generally should equal.When rolling, send in the cross wedge rolling machine bar that is heated to 1000 ℃～1200 ℃ rolling.In the operation of rolling, treat that the recessed shelves place of the previous cam journal operation of rolling finishes fully after, the recessed shelves of a back cam journal enter the operation of rolling again, one by one recessed shelves place are rolled to both sides by the camshaft middle part.A rolling cycle is produced one or pair of cams axis blank product.
Because the present invention adopts the formula that staggers to arrange the wedge type projection, make that the recessed shelves of the previous cam journal place operation of rolling finishes fully after, the recessed shelves of back cam journal place just enters the operation of rolling, has avoided cam part enfeoffment material too much.Can accurately control metal volume like this, reach the control cam portion diameter problem of exceeding standard of growing up.Owing to no longer include unnecessary volume, the wearing and tearing of mould type groove will greatly alleviate, thereby can significantly improve die life.
Description of drawings
Fig. 1 is a multi-cylinder cam shaft blank cross wedge rolling product schematic diagram.H is the cam shaft blank length overall among the figure, and H=300～1200mm, D are the cam shaft blank maximum gauge, and D=30～90mm, d are the recessed shelves of camshaft journal place diameter, and d=20～60mm, S are cam width, S=12～22mm.
Fig. 2 is multi-cylinder cam shaft blank cross wedge rolling formula wedge type projection arrangements (part) schematic diagram that staggers.1 is last wedge type projection among the figure, and 2 is back one wedge type projection, and J is the end point of last wedge type projection, and K is the starting point of back one wedge type projection, and L is the Strain During Finishing Stage of last wedge type.
Fig. 3 is a kind of four cylinder cam shaft blank cross wedge rolling die expanded views
The specific embodiment
With rolling four cylinder cam shaft blanks shown in Figure 1 is example explanation embodiment of the present invention.Fig. 1 is one or four cylinder cam shaft blanks, D=60mm, d=36mm, S=18mm, H=527mm.With diameter is 60mm, and length is that the round steel of 374mm is heated to 1150 degree, sends into cross wedge rolling machine position to be rolled by feed mechanism, roll forming in two rolls.Roller diameter is 800mm, the expanded view of roller mold as shown in Figure 3, wedge type on it projection is the formula layout that staggers.In the operation of rolling, treat that the recessed shelves place of the previous cam journal operation of rolling finishes fully after, the recessed shelves of a back cam journal enter the operation of rolling again, are rolled to the recessed one by one shelves in both sides by the camshaft middle part.Roll rotates a circle and produces one four cylinder cam shaft blank product.
Claims (1)
1, the multi-cylinder cam shaft blank accurate shaping method for cross rolling wedge that is staggeredly arranged of a kind of wedge type projection, it is characterized in that: adopt the rolling cam shaft blank with 2～20 recessed shelves steps of cross wedge rolling, each wedge type projection of launching one by one sequentially on the cross wedge rolling die adopts the formula that staggers to arrange; Rise a Strain During Finishing Stage L is arranged between the wedge point K at preceding wedge end point J and back wedge, the recessed shelves of wedge rolled piece axle journal located to be rolled half of diameter girth before the length of L should equal; When rolling, send in the cross wedge rolling machine bar that is heated to 1000 ℃～1200 ℃ rolling; After the recessed shelves of the previous cam journal place operation of rolling finished fully, the recessed shelves of a back cam journal entered the operation of rolling again, one by one recessed shelves place are rolled to both sides by the camshaft middle part, and a rolling cycle is produced one or pair of cams axis blank product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100988586A CN100509191C (en) | 2007-04-28 | 2007-04-28 | Accurate forming method of multi-vat camshaft cross-wedge blank with wedge shaped stagger convex parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100988586A CN100509191C (en) | 2007-04-28 | 2007-04-28 | Accurate forming method of multi-vat camshaft cross-wedge blank with wedge shaped stagger convex parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101036918A CN101036918A (en) | 2007-09-19 |
| CN100509191C true CN100509191C (en) | 2009-07-08 |
Family
ID=38888212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100988586A Expired - Fee Related CN100509191C (en) | 2007-04-28 | 2007-04-28 | Accurate forming method of multi-vat camshaft cross-wedge blank with wedge shaped stagger convex parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100509191C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601277B (en) * | 2012-03-11 | 2014-03-05 | 莱芜市汇锋汽车轴齿有限公司 | Automobile gearbox intermediate gear shaft blank three-time wedging mould and rolling method thereof |
| CN102717013B (en) * | 2012-07-14 | 2014-04-30 | 莱芜市汇锋汽车轴齿有限公司 | Double-intermediate shaft symmetrical cross wedge rolling mold and rolling method thereof |
| CN112718867B (en) * | 2020-12-09 | 2022-08-26 | 太原理工大学 | Three-roller skew rolling forming method for metal composite pipe with corrugated joint surface |
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2007
- 2007-04-28 CN CNB2007100988586A patent/CN100509191C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101036918A (en) | 2007-09-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20120428 |