CN104942536B - Engine hollow valve blank accurate forming method - Google Patents
Engine hollow valve blank accurate forming method Download PDFInfo
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- CN104942536B CN104942536B CN201510237479.5A CN201510237479A CN104942536B CN 104942536 B CN104942536 B CN 104942536B CN 201510237479 A CN201510237479 A CN 201510237479A CN 104942536 B CN104942536 B CN 104942536B
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- hollow valve
- blank
- die
- pan portion
- valve
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
-
- 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
-
- 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
- B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/12—Cooling of valves
- F01L3/14—Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to engine hollow valve blank accurate forming method, precise wedge lateral base is realized by cross wedge rolling die, air valve metal tube material is set to be deformed upon and medial recess, two ends elongation under the rolling effect of cross wedge rolling die, middle part forms the bar portion of hollow valve, two ends form pan portion to be processed, neck of the linkage section formation with arc-shaped concave and frustum cone side structure between pan portion and bar portion, thus makes the uniformity between the shape and size of the hollow valve blank of acquisition good；Pan portion processing is carried out to the hollow valve prefabricated blank of acquisition by using the die-forging forming mould with the obtained hollow valve pan portion structure matching, hollow valve prefabricated blank is placed directly within the cavity of die-forging forming mould and realizes forging, so as to which the overall streamline of bar portion, neck and the pan portion of realizing the hollow valve being made is reasonably distributed, tissue is fine and closely woven, meet performance requirement, waste of material is not only avoided, and effectively improves production efficiency and stock utilization.
Description
Technical field
The present invention relates to metal forming technical field, more particularly to a kind of engine hollow valve blank it is accurate into
Shape method.
Background technology
Valve is a vital part of engine valve actuating mechanism, and the opening and closing of valve make fuel gas enter cylinder
And discharge the waste gas after burning.Hollow valve realizes lightweight, and because its hollow part encloses the metal of certain volume
The effect of sodium is effectively improved heat conductivility.Frequently hit between Valve Disc and valve seating in engine working process, and
By the erosion of high-temperature high-pressure fuel gas, be especially applied with very heavy load to air valve cervix, thus valve not only to have it is higher
Mechanical performance, and require that its interior metal grain direction is consistent with profile, metallographic structure is fine and closely woven, it is strong with certain fatigue
Degree.
The conventional hollow valve production method in the country has a solid valve boring method, and this method can only obtain that bar portion is hollow and disk
Portion is still solid hollow valve, and low production efficiency, and stock utilization is low, especially for the revolving body of different shape size
The hollow valve that group is formed causes waste of material.
The content of the invention
It is an object of the invention to the shortcoming and deficiency for overcoming prior art, there is provided a kind of engine of efficient near net is hollow
Valve blank accurate forming method, is rolled to the metal tube material after being heated successively by cross wedge rolling die and die-forging forming mould
System and forging, so that metal tube material is configured to hollow valve, it is not necessary to hollowing out for valve is realized by punching, so as to avoid
Waste of material, and effectively improve production efficiency and stock utilization.
The present invention is achieved by the following technical solutions：A kind of engine hollow valve blank accurate forming method, its
Comprise the following steps：
Step 1：Manufacture cross wedge rolling die and die-forging forming mould；
Step 2：Air valve metal tube material is heated to rolling temperature；
Step 3：The air valve metal tube material for being heated to rolling temperature is rolled by the cross wedge rolling die, gas is realized
Valve metal materials in the tube produce external diameter change and form a symmetrical hollow valve blank along its axial elongation；The hollow valve
The symmetrical line of symmetry of blank is vertical with its axis, and the middle part of the hollow valve blank is bar portion, and its two ends is pan portion,
And the linkage section between its bar portion and pan portion is its neck；
Step 4：Split the hollow valve blank along the line of symmetry of the hollow valve blank, form structure identical the
One hollow valve prefabricated blank and the second hollow valve prefabricated blank；Each hollow valve prefabricated blank is by bar that is continuous and being sequentially connected
Portion, neck and pan portion composition；
Step 5：It is prefabricated to the first hollow valve prefabricated blank or the second hollow valve by the die-forging forming mould
Base is forged, and the pan portion of the pan portion or the second hollow valve prefabricated blank that complete the first hollow valve prefabricated blank is configured to hollow gas
Door pan portion, realizes being made for hollow valve.
In the present invention, the die-forging forming mould includes separately positioned die main body and impact pushes part.The mould
Have in main body provided with setting up and down and continuously connection and the impact inner chamber of axis collinear, hollow valve pan portion shaped cavity, hollow
Air valve cervix shaped cavity and hollow valve bar portion place inner chamber；The hollow valve pan portion shaped cavity is by setting up and down and company
The cylindrical forming cavity of continuous disk, discone antenna surface forming cavity and pan portion concave surface forming cavity composition, the cylindrical forming cavity of disk are used to form sky
The disk of core valve pan portion is cylindrical, and the discone antenna surface forming cavity is used for the discone antenna surface for forming hollow valve pan portion, the pan portion concave surface
Forming cavity is used for the arc-shaped concave for forming hollow valve pan portion；The profile of the hollow valve neck shaped cavity with it is described hollow
The outline of the neck of valve blank is consistent；The hollow valve bar portion places the profile and the hollow valve blank of inner chamber
The outline of bar portion is consistent.It is flat for a punching press carrying for being used to carry outside stamping press that the impact pushes the top end face of part
Face, the middle part of its bottom end face is provided with an inner chamber that can stretch into hollow valve prefabricated blank and stamping press is acted on into hollow valve
The forge piece of prefabricated blank pan portion；The peripheral surface of the forge piece is by setting up and down, axis collinear and continuous frustum cone side, arc
Concave surface and Cylinder Combination are formed.
In the present invention, in the step 3, the peripheral surface of the neck of the hollow valve blank by continuous frustum cone side with
Arc-shaped concave is interconnected to form.
The radius R1 and pan portion in the die-forging forming mould of the arc-shaped concave of the neck of each hollow valve prefabricated blank are recessed
Relation between the radius R0 of face forming cavity Cavity surface meets R1=1.05 × R0；The arc-shaped concave of the pan portion for the hollow valve being made
Radius R2 and the die-forging forming mould in pan portion concave surface forming cavity Cavity surface radius R0 between relation meet R2=R0.
The cross wedge rolling die includes wedging part, dwell portion and finishing parts.As a further improvement on the present invention,
The forming angle of the cross wedge rolling die is 35 °~38 °, and its broadening angle for wedging part is 4 °~6 °, the broadening of its dwell portion
Angle is 3 °~5 °.
As a further improvement on the present invention, in the step 3, the cross wedge rolling die adds in the case of coming to nothing to described
The air valve metal tube material of heat to rolling temperature is rolled.
In the present invention, in the step 5, the first hollow valve prefabricated blank or the second hollow valve prefabricated blank are utilized
Roll waste heat and realize forging, or, before forging, the first hollow valve prefabricated blank or the second hollow valve prefabricated blank are entered
Row heating.
In the present invention, in the step 1, the specification of obtained hollow valve manufactures its corresponding cross wedge rolling as needed
Mould and die-forging forming mould.
In the present invention, in the step 2, the heating of air valve metal tube material is realized by heating furnace；And the air valve metal
Materials in the tube are steel pipe material；In the step 3, by the way that the cross wedge rolling die is installed on into cross wedge rolling machine, and will by material-pulling device
The air valve metal tube material for being heated to rolling temperature is pushed in the cross wedge rolling machine, realizes the cross wedge rolling die to described
It is heated to the rolling of the air valve metal tube material of rolling temperature.
As a further improvement on the present invention, the rolling temperature is 1000 DEG C~1200 DEG C.
By above-mentioned technical proposal, inventive engine hollow valve blank accurate forming method has used cross wedge rolling technique
Automobile engine valve blank is produced, it has advantages below compared with traditional electric upsetting technique:
(1) precise wedge lateral base is realized by cross wedge rolling die, makes air valve metal tube material in the rolling of cross wedge rolling die
Deformed upon under effect and medial recess, two ends elongation, middle part forms the bar portion of hollow valve, and two ends form disk to be processed
Portion, the neck (peripheral surface is made up of arc-shaped concave and frustum cone side) of the linkage section formation hollow valve between pan portion and bar portion,
Be achieved in air valve metal tube material reached in the Regularity of Workpiece of Cross Wedge Rolling stage manufacture require, make acquisition hollow valve blank shape with
Uniformity between size is good, and avoids and obtain the bar portion surface of revolution by follow-up rough machined mode, effectively increases production
Efficiency and stock utilization；
(2) after the completion of by rolling, the die-forging forming mould with the obtained hollow valve pan portion structure matching is utilized
Hollow valve prefabricated blank to acquisition carries out pan portion processing, and hollow valve prefabricated blank is placed directly within to the cavity of die-forging forming mould
It is middle to realize forging, so as to realize that the overall streamline of the bar portion for the hollow valve being made, neck and pan portion is reasonably distributed, organize fine and closely woven,
Meet performance requirement；
(3) realized by using air valve metal tube material as blank and roll and forge, it is not necessary to be real by way of punching
Hollowing out for existing valve, is prevented effectively from waste of material, with percent defective is low, section material rate height, forming accuracy height, productivity ratio height etc. it is excellent
Point.
In order to more fully understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Brief description of the drawings
Fig. 1 is the general flow chart of the method and step of the present invention；
Fig. 2 is the sketch of the cross wedge rolling die of the present invention；
Fig. 3 be in Fig. 2 A '-A to structural representation；
Fig. 4 is the structural representation of the die-forging forming mould of the present invention；
Fig. 5 is the structural representation of the air valve metal tube material of the present invention；
Fig. 6 is the schematic diagram of cross wedge rolling die of the invention to the operation of rolling of air valve metal tube material, wherein, (a) is wedge
The structural representation of air valve metal tube material when transverse rolling mould wedges section, (b) is air valve metal when cross wedge rolling die wedges smooth section
The structural representation of materials in the tube, the structural representation of air valve metal tube material when (c) is cross wedge rolling die broadening section, (d) is cross wedge rolling
The structural representation of the hollow valve blank formed during mould Strain During Finishing Stage by air valve metal tube material；
Fig. 7 is the structural representation for the hollow valve blank that formation is rolled in the present invention；
Fig. 8 is the structural representation of the wherein hollow valve prefabricated blank formed after splitting to hollow valve blank in the present invention
Figure；
Fig. 9 is the structural representation for the hollow valve that the present invention is made.
Embodiment
Please refer to Fig. 1~9, inventive engine hollow valve blank accurate forming method comprises the following steps：
Step 1：Manufacture cross wedge rolling die 1 and die-forging forming mould 2；
In the present embodiment, the manufacture of the manufacture method and prior art mold of cross wedge rolling die 1 and die-forging forming mould 2
Method is identical, therefore will not be repeated here.Specifically, in the step 1, as needed the specification manufacture of obtained hollow valve with
Its corresponding cross wedge rolling die 1 and die-forging forming mould 2；That is, the drawing of the obtained hollow valve is first designed, then root
Corresponding cross wedge rolling die 1 and die-forging forming mould 2 are manufactured according to the drawing of designed hollow valve.
Specifically, the cross wedge rolling die 1 includes wedging part 11, dwell portion 12 and finishing parts 13.It is used as this hair
Bright further improvement, the forming angle of the cross wedge rolling die 1 is 35 °~38 °, its wedge broadening angle β 1 of part 11 for 4 °~
6 °, the broadening angle β 2 of its dwell portion 12 is 3 °~5 °.
Specifically, the die-forging forming mould 2 includes separately positioned die main body 21 and impact pushes part 22.
Provided with setting up and down and continuously connection and axis collinear impact inner chamber 211, hollow gas in the die main body 21
Door pan portion shaped cavity 212, hollow valve neck shaped cavity 213 and hollow valve bar portion place inner chamber 214；The hollow gas
Door pan portion shaped cavity 212 is recessed by the cylindrical forming cavity 212a of setting up and down and continuous disk, discone antenna surface forming cavity 212b and pan portion
Face forming cavity 212c is constituted, and the disk that the cylindrical forming cavity 212a of disk is used to be formed hollow valve pan portion is cylindrical, the discone antenna surface
Forming cavity 212b is used for the discone antenna surface for forming hollow valve pan portion, and the pan portion concave surface forming cavity 212c is used to form hollow valve
The arc-shaped concave of pan portion.
It is a punching press load plane 221 for carrying outside stamping press that the impact, which pushes the top end face of part 22,
The middle part of its bottom end face can be stretched into the inner chamber of hollow valve prefabricated blank provided with one and that stamping press is acted on into hollow valve is pre-
The forge piece 222 of base pan portion；The peripheral surface of the forge piece 222 is by setting up and down, axis collinear and continuous frustum cone side
222a, arc-shaped concave 222b and face of cylinder 222c combine to be formed.
Step 2：Air valve metal tube material 3 is heated to rolling temperature；Preferably, the rolling temperature is 1000 DEG C~1200
℃。
Specifically, in the step 2, the heating of air valve metal tube material 3 is realized by heating furnace；In the present embodiment,
The air valve metal tube material 3 is steel pipe material.
Step 3：The air valve metal tube material 3 for being heated to rolling temperature by 1 pair of the cross wedge rolling die is rolled, and is realized
Air valve metal tube material 3 produces external diameter change and forms a symmetrical hollow valve blank 4 along its axial elongation；It is described hollow
The symmetrical line of symmetry of valve blank 4 is vertical with its axis, and the middle part of the hollow valve blank 4 is bar portion 41, and it two
It is its neck (42 and 43) to hold as the linkage section between pan portion (44 and 45), and its bar portion 41 and pan portion (44 and 45).
Specifically, in the step 3, by the way that the cross wedge rolling die 1 is installed on into cross wedge rolling machine, and material-pulling device is passed through
The air valve metal tube material 3 for being heated to rolling temperature is pushed in the cross wedge rolling machine, 1 pair of the cross wedge rolling die is realized
The rolling of the air valve metal tube material 3 for being heated to rolling temperature.
In the step 3, the peripheral surface of the neck of the hollow valve blank 4 is by continuous frustum cone side and arc-shaped concave
It is interconnected to form.As a kind of more excellent technical scheme, in the step 3, the cross wedge rolling die 1 is right in the case of coming to nothing
The air valve metal tube material 3 for being heated to rolling temperature is rolled.
Further, the neck of the profile of the hollow valve neck shaped cavity 213 and the hollow valve blank 4 is outer
Profile is consistent；The hollow valve bar portion places the outline one of the profile of inner chamber 214 and the bar portion of the hollow valve blank 4
Cause.
Step 4：Split the hollow valve blank 4 along the line of symmetry of the hollow valve blank 4, form structure identical
First hollow valve prefabricated blank and the second hollow valve prefabricated blank；Each hollow valve prefabricated blank 5 is by continuous and be sequentially connected
Bar portion 51, neck 52 and pan portion 53 are constituted.
Step 5：It is prefabricated by 2 pairs of die-forging forming mould the first hollow valve prefabricated blank or the second hollow valve
Base is forged, and the pan portion of the pan portion or the second hollow valve prefabricated blank that complete the first hollow valve prefabricated blank is configured to hollow gas
Door pan portion, realizes being made for hollow valve 6.
Further, in steps of 5, the rolling of the first hollow valve prefabricated blank or the second hollow valve prefabricated blank is utilized
Waste heat realizes forging, or, before forging, the first hollow valve prefabricated blank or the second hollow valve prefabricated blank are added
Heat.
Specifically, in steps of 5, by the way that a wherein hollow valve prefabricated blank to be placed in the hollow gas of die-forging forming mould 2
Door pan portion shaped cavity 212, hollow valve neck shaped cavity 213 and hollow valve bar portion are placed in inner chamber 214, are then utilized
Impact push part 22 to hollow valve prefabricated blank pan portion end face carry out impact push, gradually make hollow valve prefabricated blank pan portion by
Press and fill up hollow valve pan portion shaped cavity 212, the hollow valve pan portion inner chamber profile being thus made pushes part with impact
22 outline of forge piece 222 is consistent, and its pan portion outline is consistent with hollow valve pan portion 212 profiles of shaped cavity.
In order to ensure that the overall streamline distribution of obtained hollow valve is more reasonable, organize finer and closely woven and further satisfaction system
Make requirement, it is preferable that the radius R1 and the die-forging forming mould 2 of the arc-shaped concave of the neck of each hollow valve prefabricated blank 5
Relation between the radius R0 of middle pan portion concave surface forming cavity 212c Cavity surfaces meets R1=1.05 × R0；The hollow valve 6 being made
In the radius R2 of the arc-shaped concave of pan portion and the die-forging forming mould 2 between the radius R0 of pan portion concave surface forming cavity 212c Cavity surfaces
Relation meet R2=R0.Angle theta 1, institute between the round table surface and its axis of the neck periphery of each hollow valve prefabricated blank 5
State in the angle theta 2 and the die-forging forming mould 2 between the round table surface and its axis of the neck periphery for the hollow valve 6 being made
The relation between angle theta 0 between the round table surface and its axis of hollow valve neck shaped cavity 213 meets θ 1=θ 2=θ 0.
The technology of the present invention is further illustrated below in conjunction with an example：
For example：Certain model hollow valve is using method symmetrical machining blank of the invention, in blank ad-hoc location after processing
Form spherical concave station (namely peripheral surface formation arc-shaped concave of blank position herein), taper platform (namely blank position herein
Peripheral surface formation frustum cone side) and cylinder (namely blank herein position peripheral surface formed the face of cylinder).
(1) rolling obtains hollow valve prefabricated blank
For example, selection specification presses measure for 12 × 6mm of Φ steel pipe, charge length is 100mm.Use dielectric heating oven
By blank heating to 1150 DEG C, cross wedge rolling die on cross wedge rolling machine is sent into by material-pulling device and rolled.The cross wedge rolling of roll forming is pre-
Base, taper platform cone angle is 4 °, maximum outside diameter 9.5mm, spherical external diameter 7mm.Rolled piece is i.e. available from centre cut-out
Two pieces hollow valve prefabricated blank.
(2) forging realizes that the pan portion of hollow valve prefabricated blank closely shapes
Heated the one of hollow valve prefabricated blank completed is rolled by cross wedge rolling die again, will after the completion of heating
It is put into the die-forging forming mould, carries out pan portion forging and molding.
Such hollow valve uses the volume of the blank used in cross wedge rolling-die forging precise forming process that the present invention is provided
Than carrying out cross wedge rolling prefabricated blank section material 20%, and the process for eliminating rough turn bar portion centrum by the maximum outside diameter of bar portion.Die forging
Shaping dies is positioned using frustum cone side, and positioning is reliable.
Relative to prior art, inventive engine hollow valve blank accurate forming method is realized by cross wedge rolling die
Precise wedge lateral base, makes air valve metal tube material be deformed upon and medial recess, two ends under the rolling effect of cross wedge rolling die
Elongation, middle part forms the bar portion of hollow valve, and two ends form pan portion to be processed, and the linkage section between pan portion and bar portion forms sky
The neck (peripheral surface is made up of arc-shaped concave and frustum cone side) of core valve, is achieved in air valve metal tube material in Regularity of Workpiece of Cross Wedge Rolling
Stage reaches that manufacture is required, makes the uniformity between the shape and size of the hollow valve blank of acquisition good, and avoid and pass through
Follow-up rough machined mode obtains the bar portion surface of revolution, effectively increases production efficiency and stock utilization；After the completion of rolling,
The hollow valve prefabricated blank of acquisition is carried out using the die-forging forming mould with the obtained hollow valve pan portion structure matching
Pan portion is processed, and hollow valve prefabricated blank is placed directly within the cavity of die-forging forming mould and realizes forging, so as to realize what is be made
The overall streamline of bar portion, neck and pan portion of hollow valve is reasonably distributed, and is organized fine and closely woven, is met performance requirement；By using air valve
Metal tube material is realized as blank to be rolled and forges, it is not necessary to hollowing out for valve is realized by way of punching, material is prevented effectively from
Material is wasted, and has the advantages that percent defective is low, section material rate is high, forming accuracy is high, productivity ratio is high.
The invention is not limited in above-mentioned embodiment, if the various changes or deformation to the present invention do not depart from the present invention
Spirit and scope, if these are changed and deformation belongs within the scope of the claim and equivalent technologies of the present invention, then this hair
It is bright to be also intended to comprising these changes and deform.
Claims (10)
1. a kind of engine hollow valve blank accurate forming method, it is characterised in that：Comprise the following steps：
Step 1：Manufacture cross wedge rolling die and die-forging forming mould；The die-forging forming mould includes separately positioned die main body
Part is pushed with impact；
Provided with setting up and down and continuously connection and axis collinear impact inner chamber, the shaping of hollow valve pan portion in the die main body
Inner chamber, hollow valve neck shaped cavity and hollow valve bar portion place inner chamber；The hollow valve pan portion shaped cavity is by upper
Lower setting and the cylindrical forming cavity of continuous disk, discone antenna surface forming cavity and pan portion concave surface forming cavity composition；
It is a punching press load plane for carrying outside stamping press, its bottom end face that the impact, which pushes the top end face of part,
Middle part can be stretched into the inner chamber of hollow valve prefabricated blank provided with one and stamping press is acted on into hollow valve prefabricated blank pan portion
Forge piece；The peripheral surface of the forge piece is by setting up and down, axis collinear and continuous frustum cone side, arc-shaped concave and the face of cylinder
Combination is formed；
Step 2：Air valve metal tube material is heated to rolling temperature；
Step 3：The air valve metal tube material for being heated to rolling temperature is rolled by the cross wedge rolling die, air valve gold is realized
Belong to materials in the tube to produce external diameter change and form a symmetrical hollow valve blank along its axial elongation；The hollow valve blank
Symmetrical line of symmetry is vertical with its axis, and the middle part of the hollow valve blank is bar portion, and its two ends is pan portion, and its
Linkage section between bar portion and pan portion is its neck；
Step 4：Split the hollow valve blank along the line of symmetry of the hollow valve blank, form structure identical first empty
Core valve prefabricated blank and the second hollow valve prefabricated blank；Each hollow valve prefabricated blank is by bar portion that is continuous and being sequentially connected, neck
Portion and pan portion composition；
Step 5：The first hollow valve prefabricated blank or the second hollow valve prefabricated blank are entered by the die-forging forming mould
Row forging, the pan portion of the pan portion or the second hollow valve prefabricated blank that complete the first hollow valve prefabricated blank is configured to hollow valve disk
Portion, realizes being made for hollow valve, wherein, the disk of hollow valve pan portion is cylindrical to be formed by the cylindrical forming cavity of the disk, hollow gas
The discone antenna surface of door pan portion is formed by the discone antenna surface forming cavity, and the arc-shaped concave of hollow valve pan portion is shaped by the pan portion concave surface
Chamber is formed.
2. engine hollow valve blank accurate forming method according to claim 1, it is characterised in that：The hollow gas
The profile of door neck shaped cavity is consistent with the outline of the neck of the hollow valve blank；The hollow valve bar portion is placed
The profile of inner chamber is consistent with the outline of the bar portion of the hollow valve blank.
3. engine hollow valve blank accurate forming method according to claim 2, it is characterised in that：The step 3
In, the peripheral surface of the neck of the hollow valve blank is interconnected to form by continuous frustum cone side and arc-shaped concave.
4. engine hollow valve blank accurate forming method according to claim 3, it is characterised in that：Each hollow gas
The radius R1 and the radius of pan portion concave surface forming cavity Cavity surface in the die-forging forming mould of the arc-shaped concave of the neck of door prefabricated blank
Relation between R0 meets R1=1.05 × R0；The radius R2 of the arc-shaped concave of the pan portion for the hollow valve being made and the die forging
Relation in shaping dies between the radius R0 of pan portion concave surface forming cavity Cavity surface meets R2=R0.
5. engine hollow valve blank accurate forming method according to claim 1, it is characterised in that：The cross wedge rolling
Mould includes wedging part, dwell portion and finishing parts；The forming angle of the cross wedge rolling die is 35 °~38 °, its wedge
The broadening angle divided is 4 °~6 °, and the broadening angle of its dwell portion is 3 °~5 °.
6. engine hollow valve blank accurate forming method according to claim 1, it is characterised in that：The step 3
In, the cross wedge rolling die is rolled in the case of coming to nothing to the air valve metal tube material for being heated to rolling temperature.
7. engine hollow valve blank accurate forming method according to claim 1, it is characterised in that：The step 5
In, realized and forged using the rolling waste heat of the first hollow valve prefabricated blank or the second hollow valve prefabricated blank, or, in forging
Before making, the first hollow valve prefabricated blank or the second hollow valve prefabricated blank are heated.
8. engine hollow valve blank accurate forming method according to claim 1, it is characterised in that：The step 1
In, the specification of obtained hollow valve manufactures its corresponding cross wedge rolling die and die-forging forming mould as needed.
9. engine hollow valve blank accurate forming method according to claim 1, it is characterised in that：
In the step 2, the heating of air valve metal tube material is realized by heating furnace；And the air valve metal tube material is steel pipe material；
In the step 3, by the way that the cross wedge rolling die is installed on into cross wedge rolling machine, and it is heated to by material-pulling device by described
The air valve metal tube material of rolling temperature is pushed in the cross wedge rolling machine, realizes that the cross wedge rolling die is heated to rolling to described
The rolling of the air valve metal tube material of temperature.
10. engine hollow valve blank accurate forming method according to claim 1, it is characterised in that：The rolling
Temperature is 1000 DEG C~1200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237479.5A CN104942536B (en) | 2015-05-11 | 2015-05-11 | Engine hollow valve blank accurate forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237479.5A CN104942536B (en) | 2015-05-11 | 2015-05-11 | Engine hollow valve blank accurate forming method |
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| Publication Number | Publication Date |
|---|---|
| CN104942536A CN104942536A (en) | 2015-09-30 |
| CN104942536B true CN104942536B (en) | 2017-10-17 |
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Families Citing this family (1)
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| WO2016179780A1 (en) * | 2015-05-11 | 2016-11-17 | 怀集登云汽配股份有限公司 | Efficient near net shape precision forming method of hollow valve blank for engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5054195A (en) * | 1989-09-06 | 1991-10-08 | Mercedes-Benz Ag | Process for the production of a valve |
| CN101786132A (en) * | 2010-02-05 | 2010-07-28 | 北京科技大学 | Automobile engine valve blank cross wedge rolling accurate forming method |
| CN103403305A (en) * | 2011-03-22 | 2013-11-20 | 三菱重工业株式会社 | Method for manufacturing hollow engine valve |
| CN103990944A (en) * | 2014-06-06 | 2014-08-20 | 济南沃德汽车零部件有限公司 | Method for manufacturing hollow sodium inflating valve with closed disc end |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2244135C2 (en) * | 2003-01-23 | 2005-01-10 | Общество с ограниченной ответственностью "Компоненты двигателя" | Valve of internal combustion engine, method of its manufacture, and heat resistant titanium alloy used for its manufacture |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5054195A (en) * | 1989-09-06 | 1991-10-08 | Mercedes-Benz Ag | Process for the production of a valve |
| CN101786132A (en) * | 2010-02-05 | 2010-07-28 | 北京科技大学 | Automobile engine valve blank cross wedge rolling accurate forming method |
| CN103403305A (en) * | 2011-03-22 | 2013-11-20 | 三菱重工业株式会社 | Method for manufacturing hollow engine valve |
| CN103990944A (en) * | 2014-06-06 | 2014-08-20 | 济南沃德汽车零部件有限公司 | Method for manufacturing hollow sodium inflating valve with closed disc end |
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Effective date of registration: 20190322 Address after: 526499 Huaiji Dengyun Automobile Parts Co., Ltd. Factory Building 1-4, Hengdong Industrial Zone, Huaicheng Town, Huaiji County, Zhaoqing City, Guangdong Province Patentee after: Huaiji landing gate Co., Ltd. Address before: 526400 Dengyun Pavilion, Huaiji County, Zhaoqing City, Guangdong Province Patentee before: HUAIJI DENGYUN AUTO-PARTS (HOLDING) CO., LTD. |