CN107243583A - A kind of continuous variation ellipse section roll milling apparatus and blank-making method - Google Patents
A kind of continuous variation ellipse section roll milling apparatus and blank-making method Download PDFInfo
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- CN107243583A CN107243583A CN201710608327.0A CN201710608327A CN107243583A CN 107243583 A CN107243583 A CN 107243583A CN 201710608327 A CN201710608327 A CN 201710608327A CN 107243583 A CN107243583 A CN 107243583A
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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
- B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
- B21H8/02—Rolls of special shape
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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
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Abstract
The present invention relates to a kind of continuous variation ellipse section roll milling apparatus and blank-making method, including spaced some to roll stacks, each pair roll stacks are constituted by topping roll and bottom roll, are opened up relative groove on topping roll and bottom roll, are formed the roll shape hole for roll stock；Roll stacks include importing roll stacks, forming rolls group, torsion roll stacks and the shaping roll group sequentially coaxially set from front to back, wherein, it is circle to import the roll shape hole of roll stacks and shaping roll group, and the roll shape hole of forming rolls group is oval；Roll stacks are reversed including some pairs and roll shape hole is ellipse, and from front to back, there is the anglec of rotation between oval major axis on the adjacent roll shape hole for reversing roll stacks, last is parallel to the transverse for reversing the roll shape hole of roll stacks and the roll shape hole of forming rolls group.The Continuous maching to axial workpiece blank can be realized in the present invention, realizes that material plasticity is deformed, equipment load requirement is reduced, improves the overall performance of blank.
Description
Technical field
The present invention relates to the cold and hot working field of metal material, and in particular to a kind of continuous variation ellipse section roll milling apparatus and
Blank-making method.
Background technology
Longaxones parts have very important status, such as auto industry, Aero-Space, machine-building in the industrial production
Etc. in industry, the critical function in mechanized equipment is undertaken, is mainly used in machinery transmitting power and motion, supports other zero
Part.Its intensity requirement is therefore higher, but in the process such as metallurgical, casting, forging, material internal often has shrinkage cavity, dredged
Pine, be mingled with, segregation, the tissue defects such as coarse grains, and fracture crack from these position forming cores and is grown up first, easily causes axle
The failure of class part, influences the use of part.Thus improved using FMT inside the forging permeability of forging stock, forging condensation material
Loose, microdefect, improves the tissue defects such as segregation and coarse grains, to improve the performance of axial workpiece and use reliable
Property.
For the forged article technique and method of axle class blank, research both domestic and external is more ripe, and conventional mainly has upsetting
Pull out technique and extrusion process.But the limited deformation that single upsetting pull technique is produced to blank, is unfavorable for improving the interior tissue of blank,
And the external margin of blank is easily caused in processing crackle occur, influence product quality.And conventional extrusion technique, required equipment
Involve great expense, tonnage and base size can not be too big, blank cross section deformation lack of homogeneity, and rely primarily on section and reduce to improve
Deformation extent, for big specification forging, it is necessary to blank material it is oversized, production cost is high, while requiring mould bearing strength
Greatly, the blank center portion and edge deformation degree after more crucially processing are uneven.
In recent years, much constantly produce, such as become using big plasticity on improving new method, the new technology of material structure performance
Shape (SPD) method carrys out refiner material crystal grain, improves structure property, and conventional method is Equal Channel Angular Pressing (Equal Channel
Angular Press, ECAP).Patent such as Publication No. CN201371172 proposes a kind of variable-channel extrusion die, but right
In Machining of Shaft-type Parts, there is certain deficiency in this method, and on the one hand because extruding tonnage is big, this method is difficult to realize, the opposing party
Face, it is poor that it processes continuity.In addition Publication No. CN201711480U patent, discloses a kind of using oval cross section torsion
To improve the process that forged shaft forges permeability, but its Continuous maching needs further improve.
The content of the invention
It is an object of the invention to overcome problems of the prior art to be filled there is provided a kind of continuous variation ellipse section rolling
Put and blank-making method, the Continuous maching to axial workpiece blank can be realized, the variable conduit to blank is realized by roller combination
Deformation, being capable of refiner material crystal grain, the overall performance of raising blank.
In order to achieve the above object, the present invention is adopted the following technical scheme that：
Including spaced some to roll stacks, each pair roll stacks are constituted by topping roll and bottom roll, topping roll and
Relative groove is opened up on bottom roll, the roll shape hole for roll stock is formed；
Importing roll stacks that roll stacks include sequentially coaxially setting from front to back, forming rolls group, reverse roll stacks and whole
Shape roll stacks, wherein, it is circle to import the roll shape hole of roll stacks and shaping roll group, and the roll shape hole of forming rolls group is ellipse
Shape；
Roll stacks are reversed including some pairs and roll shape hole is ellipse, and from front to back, the adjacent roller for reversing roll stacks
There is anglec of rotation α between oval major axis in type hole, last is to reversing the roll shape hole of roll stacks and the roll shape of forming rolls group
The transverse in hole is parallel.
Further, the line of centres of topping roll and bottom roll that i-th pair reverses roll stacks is Li；I-th pair reverses roll
Oval major axis and line of centres L on the roll shape hole of groupiBetween there is angle thetai, i=1,2 ..., n, n ＞ 1；α=θi+1-θi, α
At 10~20 °.
Further, forming rolls group is consistent with the oval size for reversing roll stacks, and the major axis and short axle of ellipse
The ratio between 1.17~1.6.
Further, shaping roll group includes the first shaping roll group and the second shaping roll set gradually from front to back
Group.
Further, the roll shape hole diameter of section for importing roll stacks is R1, and the roll shape hole cross-section minor axis for reversing roll stacks is long
Spend for D, the roll shape hole diameter of section of the first shaping roll group is R2, and the roll shape hole diameter of section of the second shaping roll group is R3,
Wherein, D, R3 are equal with the aimed dia of prefabricated blank, and R3, R2 and R1 increase successively.
Further, R2 1~5mms bigger than R3, R1 1~5mm bigger than R2.
Further, between adjacent rollers group at intervals of 150~300mm.
A kind of continuous variation ellipse section blank-making method carried out using continuous variation ellipse section roll milling apparatus as described above, bag
Include following steps：
Step one：Blank to be processed is preformed with first to bite section and smooth changeover portion, wherein biting the straight of section
The aimed dia of footpath and prefabricated blank is equal；
Step 2：By blank bite section by importing roll stacks import and rolling, then sequentially pass through forming rolls group,
Roll stacks and shaping roll group rolling are reversed, continuous variation ellipse section base is completed.
Further, the coefficient of friction in step 2 between blank and roll stacks is 0.3~0.5.
Further, shaping roll group includes the first shaping roll group and the second shaping roll set gradually from front to back
Group；In roll milling process, the angular speed for importing roll stacks is ω 1, and the angular speed of forming rolls group is ω 2, reverses the angle of roll stacks
Speed is ω 3, and the angular speed of the first shaping roll group is ω 4, and the angular speed of the second shaping roll group is ω 5, wherein, ω 1≤
The ＜ ω 5 of 3 ＜ ω of ω 2=ω 4.
Compared with prior art, the present invention has following beneficial technique effect：
The torsion roll stacks in continuous variation ellipse section are used in apparatus of the present invention, oval torsion section is carried out to long axis blank
Rolling is extruded, the Continuous maching to axial workpiece blank can be realized, by caused by angle difference between roll stacks oval cross section
Shear action, realizes that material plasticity is deformed；Roll stacks are realized to blank Continuous maching by the rolling that cooperates；Pass through multiple roll stacks
Combination, so as to reduce equipment load requirement, processing continuity is good；Realized by roller combination and the variable conduit of blank deformed,
Can refiner material crystal grain, blank can be made to reach more than 1 large plastometric set, the overall performance of blank is improved.
Further, anglec of rotation α is selected in 10~20 ° in the present invention, can be between adjacent torsion roll stacks smoothly
Transition, reduces equipment resistance.
Further, forming rolls group is consistent with the oval size for reversing roll stacks in the present invention, and major axis and short axle
The ratio between 1.17~1.6, effectively prevent ellipse long and short shaft from causing that deformation drag is excessive and the too small deflection of axle ratio is inadequate than excessive
The problem of.
Further, two shaping roll groups are set in the present invention, being capable of preferably shaping, it is ensured that prefabricated blank can reach
Aimed dia.
The inventive method uses the long axis blank of continuous variation ellipse section rolling system, improves major axis class blank forming quality, gram
Material present in existing process technology is taken big in axial workpiece forgeability, or Equal Channel Angular Pressing in forming process
The deficiency of the long blank Continuous maching of specification.
Further, the angular speed in the present invention between each roll stacks gradually increases, and can effectively prevent in roll milling process
The delay of middle blank or blank necking rupture etc..
Brief description of the drawings
Fig. 1 is the structure chart of successive roll group；
Fig. 2 (a) is the front view for the importing roll stacks that roll shape is circle, and Fig. 2 (b) is introduced into the a-a of roll stacks to sectional view,
Fig. 2 (c) is introduced into the top view of roll stacks；
Fig. 3 (a) is roll shape for the front view of oval forming rolls group, and Fig. 3 (b) is the b-b of forming rolls group to section view
Figure, Fig. 3 (c) is the top view of forming rolls group；
Fig. 4 is that roll shape is oval torsion roll structure figure；
Fig. 5 (a) is that roll shape is the front view of the first shaping roll group of circle, and Fig. 5 (b) is the d-d of the first shaping roll group
To sectional view, Fig. 5 (c) is the top view of the first shaping roll group；
Fig. 6 (a) is that roll shape is the front view of the second shaping roll group of circle, and Fig. 6 (b) is the e-e of the second shaping roll group
To sectional view, Fig. 6 (c) is the top view of the second shaping roll group.
Wherein：1- blanks；2- imports roll stacks；3- forming rolls groups；4- reverses roll stacks；5- the first shaping roll groups；
6- the second shaping roll groups.
Embodiment
The present invention is described in further details below in conjunction with the accompanying drawings.
Referring to Fig. 1, the present invention includes spaced some to roll stacks, and each pair roll stacks are by topping roll and bottom roll
Relative groove is opened up on composition, topping roll and bottom roll, the roll shape hole for roll stock 1 is formed.Adjacent rollers group it
Between at intervals of 150~300mm.
The present invention uses multigroup continuous rolling to combine, and roll stacks mainly include the roll shape sequentially coaxially set from front to back
For round importing roll stacks 2, roll shape is oval forming rolls group 3, and roll shape is that the torsion roll stacks 4 and roll shape of ellipse are round
Shaping roll group.
Referring to Fig. 2 (a) to Fig. 2 (c), importing roll stacks 2 are identical by two structures, and roll shape is the roll composition of circle, roll shape
Interface was the center of circle and diameter perpendicular to the section of roll radial direction.
Referring to Fig. 3 (a) to Fig. 3 (c), forming rolls group 3 is that two structures are identical, and roll is oval roll composition, is rolled
Roller interface is the long axis cross-section of the oval roll shape perpendicular to roll radial direction.
Referring to Fig. 4, roll stacks 4 are reversed including some pairs and roll shape hole is ellipse, are multi-pass roller combination, per pass
Secondary two rolls are one group, and roll shape is the ellipse with the oval type groove area equation of forming rolls group 3 after combination, and difference is ellipse
Round major and minor axis have passed through the torsion of certain angle, the torsion of the oval cross section roll shape of adjacent rollers group in the torsion roll stacks 4
Angle [alpha] increases according to steady state value, and by multi-pass accumulation be rotated by 360 ° after, overlapped again unanimously with the roll shape of forming rolls group 3,
I.e. last is parallel to the transverse for reversing the roll shape hole of roll stacks 4 and the roll shape hole of forming rolls group 3.And reverse roll
The roll shape interface of 4 each roll stacks of group was elliptical center and perpendicular to the section of roll radial direction.
The line of centres of topping roll and bottom roll that i-th pair reverses roll stacks 4 is Li；I-th pair reverses the roll shape of roll stacks 4
Oval major axis and line of centres L on holeiBetween there is angle thetai, i=1,2 ..., n, n ＞ 1；α=θi+1-θi, α 10~
20°。
The ratio between consistent with the oval size for the reversing roll stacks 4 and oval major axis of forming rolls group 3 and short axle exist
1.17~1.6.
Referring to Fig. 5 (a) to Fig. 6 (c), shaping roll group includes two passages, and the roll shape of two passage shaping rollers is circle, after
The roll shape circular diameter of second shaping roll group 6 of one passage is base aimed dia, the first shaping roll group 5 of preceding a time
Roll shape diameter of a circle it is more latter bigger, the roll shape interfaces of two shaping roll groups was center of circle diameter and perpendicular to rolling
Roll neck to section.
Roll stacks 2 are imported, forming rolls group 3 reverses each group in roll stacks 4, shaping roll group each along its successively to roll
It is lineal layout from the roll shape line of centres, and each roll shape center spacing keeps constant.The roll shape hole section for importing roll stacks 2 is straight
Footpath is R1, and the roll shape hole cross-section minor axis length for reversing roll stacks 4 is D, and the roll shape hole diameter of section of the first shaping roll group 5 is
R2, the roll shape hole diameter of section of the second shaping roll group 6 is R3, wherein, D, R3 are equal with the aimed dia of prefabricated blank, R3,
R2 and R1 increase successively, and R2 1~5mm bigger than R3, R1 1~5mm bigger than R2.
The present invention main course of work and principle：
When being processed deformation to blank 1, first blank 1 to be processed is preformed with to bite section and smooth changeover portion,
Wherein bite section diameter and prefabricated blank aimed dia it is equal；Roll stacks 2 are imported, forming rolls group 3 reverses roll stacks 4, whole
Upper roller in shape roll stacks is rotated in the counterclockwise direction around respective axis with a fixed angular speed, imports roll stacks 2, shaping is rolled
Roller group 3, the lower roll reversed in roll stacks 4, shaping roll group is turned along clockwise direction around respective axis with a fixed angular speed
It is dynamic, complete continuous variation ellipse section base.For the angular speed of different roll stacks, the angular speed for importing roll stacks 2 is ω 1, into
The angular speed of shape roll stacks 3 is ω 2, and the angular speed for reversing roll stacks 4 is ω 3, and the angular speed of the first shaping roll group 5 is ω 4,
The angular speed of second shaping roll group 6 is ω 5, and its relation is the ＜ ω 5 of 3 ＜ ω of ω 1≤ω 2=ω 4, passes through such angular speed
Setting can avoid the delay of blank or blank necking rupture etc. in roll milling process.
The present invention can realize the Continuous maching to axial workpiece blank, and the variable conduit to blank is realized by roller combination
Deformation, being capable of refiner material crystal grain, the overall performance of raising blank.
Embodiment one
This example uses the prefabricated blank of continuous variation ellipse section roll stacks rolling longaxones parts.Moulding prefabricated blank material
For copper, specification isPreparing specification isPrefabricated blank.
The one end of blank 1 is preformed with a diameter of 40mm first, length be 20mm and andDiameter smooth transition is stung
Enter section, a length of 30mm of changeover portion；Blank 1 is heated to 900 DEG C, blank 1 then must be processed into end is imported simultaneously by importing roll stacks 2
Start rolling, the structure for importing two rolls in roll stacks 2 is identical, and diameter is 100mm, and width is 70mm；Import roll stacks 2
Roll shape hole section is circle, a diameter of 48mm, and the interface of roll shape was the center of circle and perpendicular to the section of roll radial direction；Importing is rolled
Topping roll is rotated in an anti-clockwise direction with 0.57rad/s rotating speeds around its axis in roller group 2, and imports in roll stacks 2 bottom roll with same
Sample 0.57rad/s rotating speeds around its axis rotationally clockwise；Blank enters forming rolls group 3 after importing the rolling of roll stacks 2
Rolling is carried out, forming rolls group 3, which is located at, imports the discharging of roll stacks 2 direction, and forming rolls group 3 is rolled including two structure identicals
Roller, diameter is 100mm, and width is that plane where two roll mandrels is rolled with the two of importing roll stacks 2 in 70mm, forming rolls group 3
Plan range where roll shaft is 150mm, and the roll shape hole section of forming rolls group 3 is oval, the long 40mm of ellipse short shaft, and major axis is
57.6mm, roll shape hole section is using major axis as interface, and the topping roll of forming rolls group 3 is inverse around its axis with 0.74rad/s rotating speeds
Clockwise is rotated, and is shaped the bottom roll of roll stacks 3 and rotated with 0.74rad/s rotating speeds around wherein axis both clockwise direction.
Enter to reverse in the progress rolling of pressure roller group 4, the present embodiment after the shaped rolling of roll stacks 3 of blank and use 24 pairs
Pressure roller group is reversed, detailed process includes：
Enter first after the shaped rolling of roll stacks 3 of blank and reverse pressure roller group progress rolling, the first torsion pressure roller group is located at
The discharging of forming rolls group 3 direction, first, which reverses pressure roller group, includes two rolls, and diameter is 100mm, and width is 70mm, and first turns round
It is 150mm to turn plane where two roll mandrels and plan range where two roll mandrels of forming rolls group 3 in pressure roller group, and first reverses
Its roll shape hole section of pressure roller group is oval, the long 40mm of ellipse short shaft, and major axis is 57.6mm, and oval major axis is radially pressed from both sides with roll
Angle is 75 °, and the interface of roll shape was elliptical center and perpendicular to the section of roll radial direction, first reverse pressure roller group topping roll with
0.74rad/s rotating speeds are rotated in an anti-clockwise direction around its axis, and first reverse pressure roller group bottom roll with 0.74rad/s rotating speeds around
Wherein axis both clockwise direction is rotated；Base roll shape is rolled, and second, which reverses roll stacks, is located at the first torsion pressure roller group discharging direction, second
Reversing roll stacks includes two rolls, and diameter is 100mm, and width is 70mm, and second reverses in roll stacks where two roll mandrels
Plane is 150mm with plan range where the first two roll mandrels for reversing pressure roller group, and the second torsion roll stacks roll shape hole section is
Ellipse, the long 40mm of ellipse short shaft, major axis is 57.6mm, and oval major axis and roll radial direction angle is 60 °, point of two roller roll shapes
Interface was elliptical center and perpendicular to the section of roll radial direction, second reverse roll stacks topping roll with 0.74rad/s rotating speeds around
Its axis is rotated in an anti-clockwise direction, and second reverses roll stacks bottom roll with 0.74rad/s rotating speeds around wherein axis both clockwise
Direction is rotated；Blank reverses pressure roller group to the 24th torsion pressure roller group through the 3rd again successively and carries out rolling, and the 3rd reverses pressure roller
Group is into the 24th torsion pressure roller group, and each group roll is located at upper one group of discharging direction, and each group roller diameter is 100mm,
Width is that the distance of plane and plane where the roll axis of a upper roll stacks where 70mm, each group roll axis is
150mm, each group roller type hole section is ellipse, the long 40mm of ellipse short shaft, and major axis is 57.6mm, oval major axis and its
Roll radial direction angle reduces 15 ° successively, and the interface of roll shape was elliptical center and turned round perpendicular to the section of roll radial direction, the 3rd
Turn topping roll of the pressure roller group into the 24th torsion pressure roller group with 0.74rad/s rotating speeds around its axis counterclockwise to turn
It is dynamic, and bottom roll is rotated with 0.74rad/s rotating speeds around wherein axis both clockwise direction；Blank reverses pressure roller group roller through the 24th
Enter the first shaping roll group 5 after rolling and carry out rolling, the first shaping roll group 5 is located at the 24th and reverses pressure roller group discharging side
To plane where two roll mandrels and plane separation where the 24th two roll mandrels for reversing pressure roller group in the first shaping roll group 5
From for 150mm, the first shaping roll group 5 includes two structure identical rolls, and diameter is 100mm, and width is 70mm, its roller
Type hole section is circle, and diameter of a circle is 45mm, and the interface of roll shape was the center of circle and perpendicular to the section of roll radial direction, first
The topping roll of shaping roll group 5 is rotated in an anti-clockwise direction with 0.844rad/s rotating speeds around its axis, and under the first shaping roll group 5
Roll is rotated with 0.844rad/s rotating speeds around wherein axis both clockwise direction；Blank enters after the rolling of the first shaping roll group 5
Second shaping roll group 6 carries out rolling, and the second shaping roll group 6 is located at the first shaping roll group 5 discharging direction, and the second shaping is rolled
Plane where two roll mandrels and plan range where two roll mandrels of the first shaping roll group 5 are 150mm in roller group 6, and second is whole
Shape roll stacks 6 include two structure identical rolls, and diameter is 100mm, and width is 60mm, and roll shape hole section is circle, circle
A diameter of 40mm, the interface of roll shape was the center of circle and perpendicular to the section of roll radial direction, the topping roll of the second shaping roll group 6
Rotated in an anti-clockwise direction with 1.06rad/s rotating speeds around its axis, and the bottom roll of the second shaping roll group 5 is turned with 1.06rad/s
Speed is rotated around wherein axis both clockwise direction.
The present embodiment carries out oval torsion sectional crush rolling, the friction between blank and 28 roll stacks to long axis blank
Coefficient is 0.4~0.5.
Embodiment two
This example uses the prefabricated blank of continuous variation ellipse section roll stacks rolling longaxones parts.Blank material is copper, rule
Lattice arePreparing specification isPrefabricated blank.
The one end of blank 1 is preformed with an a diameter of 45mm first, length be 20mm and andDiameter smooth transition
Bite section, a length of 30mm of changeover portion；By blank heating to 450 DEG C, blank then must be processed into end and imported by importing roll stacks 2
And starting rolling, the structure for importing two rolls in roll stacks 2 is identical, and diameter is 200mm, and width is 90mm；Import roll
The roll shape hole section of 2 middle shaped segments of group is circle, diameter 56mm, the interface of roll shape be the center of circle and perpendicular to roll radially
Section；Import topping roll in roll stacks 2 to rotate in an anti-clockwise direction around its axis with 0.57rad/s rotating speeds, and import roll
Bottom roll is rotated with same 0.57rad/s rotating speeds around wherein axis both clockwise direction in group 2；Blank is through importing the rolling of roll stacks 2
Enter forming rolls group 3 afterwards and carry out rolling, forming rolls group 3 is located at the discharging direction for importing roll stacks 2, and forming rolls group 3 is wrapped
Two structure identical rolls are included, diameter is 200mm, and width is plane where two roll mandrels in 100mm, forming rolls group 3
Plan range where two roll mandrels with importing roll stacks 2 is 300mm, and the roll shape hole section of forming rolls group 3 is ellipse, and short axle is long
45mm, major axis is 70mm, and roll shape hole section is using major axis as interface, and the topping roll of forming rolls group 3 is with 0.74rad/s rotating speeds around it
Axis is rotated in an anti-clockwise direction, and shapes the bottom roll of roll stacks 3 with same 0.74rad/s rotating speeds around wherein axis both clockwise side
To rotation.
Enter after the shaped rolling of roll stacks 3 of blank and reverse in the progress rolling of pressure roller group 4, the present embodiment using 18 pairs of torsions
Turn pressure roller group, detailed process includes：
Enter first after the shaped rolling of roll stacks 3 of blank and reverse pressure roller group progress rolling, the first torsion pressure roller group is located at
The discharging direction of forming rolls group 3, first, which reverses pressure roller group, includes two rolls, and diameter is 200mm, and width is 100mm, first
It is 300mm to reverse plane where two roll mandrels and plan range where two roll mandrels of forming rolls group 3 in pressure roller group, and first turns round
It is oval, the long 45mm of short axle to turn pressure roller group roll shape hole section, and major axis is 70mm, and oval major axis is with roll radial direction angle
70 °, the interface of roll shape was elliptical center and perpendicular to the section of roll radial direction, first reverse pressure roller group topping roll with
0.74rad/s rotating speeds are rotated in an anti-clockwise direction around its axis, and first reverses pressure roller group bottom roll with same 0.74rad/s turns
Speed is rotated around wherein axis both clockwise direction；Base roll shape is rolled, and second, which reverses pressure roller group, is located at the first torsion pressure roller group discharging direction,
Second, which reverses pressure roller group, includes two rolls, and diameter is 200mm, and width is 100mm, and second reverses two roll mandrels in pressure roller group
Plan range where place plane reverses the roll mandrel of pressure roller group two with first is 300mm, and second reverses pressure roller group roll shape hole section
For ellipse, the long 45mm of ellipse short shaft, major axis is 70mm, and oval major axis and roll radial direction angle is 50 °, point of two roller roll shapes
Interface was elliptical center and perpendicular to the section of roll radial direction, second reverse pressure roller group topping roll with 0.74rad/s rotating speeds around
Its axis is rotated in an anti-clockwise direction, and the second torsion pressure roller group bottom roll is suitable around its axis with same 0.74rad/s rotating speeds
Clockwise is rotated；Blank reverses pressure roller group to the 18th torsion pressure roller group through the 3rd again successively and carries out rolling, and the 3rd reverses pressure
Roller group is into the 18th torsion pressure roller group, and each group roll is located at upper one group of discharging direction, and each group roller diameter is 200mm,
Width is that the distance of plane and plane where the roll axis of a upper roll stacks where 100mm, each group roll axis is
300mm, each group roller type hole section is ellipse, the long 45mm of ellipse short shaft, and major axis is 70mm, oval major axis and upper one
Group roll shape major axis angle reduces 20 ° successively, and the interface of roll shape was elliptical center and perpendicular to the section of roll radial direction, the 3rd
Topping roll of the pressure roller group into the 18th torsion pressure roller group is reversed with 0.74rad/s rotating speeds around its axis counterclockwise to turn
It is dynamic, and the 3rd reverses bottom roll of the pressure roller group into the 18th torsion pressure roller group with same 0.74rad/s rotating speeds around its axis
Rotationally clockwise；Blank enters the first shaping roll group 5 after reversing pressure roller group rolling through the 18th and carries out rolling, and first is whole
Shape roll stacks 5 are located at the 18th and reverse plane and the tenth where two roll mandrels in pressure roller group discharging direction, the first shaping roll group 5
The eight two roll mandrels place plan ranges for reversing pressure roller group are 300mm, and the first shaping roll group 5 is rolled including two structure identicals
Roller, diameter is 200mm, and width is 70mm, and its roll shape hole section is circle, and a diameter of 48mm, the interface of roll shape was to justify
The heart and perpendicular to the section of roll radial direction, the topping roll of the first shaping roll group 5 is with 0.844rad/s rotating speeds around its axis inverse time
Pin direction rotate, and the bottom roll of the first shaping roll group 5 with same 0.844rad/s rotating speeds around its axis rotationally clockwise；
Blank enters the second shaping roll group 6 after the rolling of the first shaping roll group 5 and carries out rolling, and the second shaping roll group 6 is located at the
Plane where two roll mandrels and the first shaping roll group 5 in one shaping roll group 5 discharging direction roll, the second shaping roll group 6
Two roll mandrels where plan range be 300mm, the second shaping roll group 6 includes two structure identical rolls, and diameter is
200mm, width is 70mm, and its roll shape hole section is circle, a diameter of 45mm, and the interface of roll shape was the center of circle and perpendicular to rolling
Roll neck to section, the topping roll of the second shaping roll group 6 rotates in an anti-clockwise direction with 1.06rad/s rotating speeds around its axis, and
The bottom roll of second shaping roll group 6 is rotated with same 1.06rad/s rotating speeds around wherein axis both clockwise direction.
The present embodiment carries out oval torsion sectional crush rolling, the friction between blank and 22 roll stacks to long axis blank
Coefficient is 0.3~0.5.
Embodiment three
This example uses the prefabricated blank of continuous variation ellipse section roll stacks rolling longaxones parts, and blank material is 40Cr
Steel, specification isPreparing specification isPrefabricated blank.
Blank one end is preformed with an a diameter of 35mm first, length be 30mm and andDiameter smooth transition
Bite section, a length of 30mm of changeover portion；By blank heating to 1130 DEG C, blank then must be processed into end and imported by importing roll stacks 2
And starting roll-in, the structure for importing two rolls in roll stacks 2 is identical, and diameter is 100mm, and width is 60mm；Import roll
The roll shape hole section of group 2 intermediary forms section is circle, a diameter of 38mm, and the interface of roll shape was the center of circle and perpendicular to roll footpath
To section；Import topping roll in roll stacks 2 to rotate in an anti-clockwise direction around its axis with 0.6rad/s rotating speeds, and import roll
Bottom roll is rotated with same 0.6rad/s rotating speeds around wherein axis both clockwise direction in group 2；Blank is after importing the rolling of roll stacks 2
Rolling is carried out into forming rolls group 3, forming rolls group 3, which is located at, imports the discharging of roll stacks 2 direction, and forming rolls group 3 includes two
Individual structure identical roll, diameter is 100mm, and width is plane where two roll mandrels and importing in 60mm, forming rolls group 3
Plan range where two roll mandrels of roll stacks 2 is 150mm, and its roll shape hole section of forming rolls group 3 is ellipse, and ellipse short shaft is long
35mm, major axis is 41.26mm, roll shape hole section using major axis as interface, the topping roll of forming rolls group 3 with 0.6rad/s rotating speeds around
Its axis is rotated in an anti-clockwise direction, and shapes the bottom roll of roll stacks 3 with same 0.6rad/s rotating speeds around wherein axis both clockwise
Direction is rotated.
Enter to reverse in the progress rolling of pressure roller group 4, the present embodiment after the shaped rolling of roll stacks 3 of blank and use 36 pairs
Pressure roller group is reversed, detailed process includes：
Enter first after the shaped rolling of roll stacks 3 of blank and reverse pressure roller group progress rolling, the first torsion pressure roller group is located at
The discharging of forming rolls group 3 direction, first, which reverses pressure roller group, includes two rolls, and diameter is 100mm, and width is 60mm, and first turns round
It is 150mm to turn plane where two roll mandrels and plan range where two roll mandrels of forming rolls group 3 in pressure roller group, and first reverses
Its roll shape hole section of pressure roller group is oval, the long 35mm of ellipse short shaft, and major axis is 41.26mm, oval major axis and roll radial direction
Angle is 80 °, and the interface of roll shape was elliptical center and reversed pressure roller group topping roll perpendicular to the section of roll radial direction, first
Rotated in an anti-clockwise direction with 0.6rad/s rotating speeds around its axis, and first reverses pressure roller group bottom roll with same 0.6rad/s turns
Speed is rotated around wherein axis both clockwise direction；Base roll shape is rolled, and second, which reverses pressure roller group, is located at the first torsion pressure roller group discharging direction,
Second, which reverses pressure roller group, includes two rolls, and diameter is 100mm, and width is 60mm, and second reverses two roll mandrels in pressure roller group
Place plane is 150mm with plan range where the first two roll mandrels for reversing pressure roller group, and second, which reverses pressure roller group roll shape hole, cuts
Face is oval, the long 35mm of ellipse short shaft, and major axis is 41.26mm, and oval major axis and roll radial direction angle is 70 °, two rolls
The interface of roll shape was elliptical center and perpendicular to the section of roll radial direction, and second reverses pressure roller group topping roll with 0.6rad/s
Rotating speed is rotated in an anti-clockwise direction around its axis, and second reverses pressure roller group bottom roll with same 0.6rad/s rotating speeds around its axis
Line is rotationally clockwise；Blank reverses pressure roller group to the 36th torsion pressure roller group through the 3rd again successively and carries out rolling, the 3rd
Pressure roller group is reversed into the 36th torsion pressure roller group, each group roll is located at upper one group of discharging direction, and each group roll is located at upper
One group of discharging direction, each group roller diameter is 100mm, and width is plane and upper one where 60mm, each group roll axis
The distance of plane where the roll axis of roll stacks is 150mm, and each group roller type hole section is ellipse, and ellipse short shaft is long
35mm, major axis is 41.26mm, and oval major axis reduces 10 ° successively with its roll radial direction angle, and the interface of roll shape was oval
Center and perpendicular to the section of roll radial direction, the 3rd reverse pressure roller group to the 36th reverse the topping roll in pressure roller group with
0.6rad/s rotating speeds are rotated in an anti-clockwise direction around its axis, and the 3rd reverses pressure roller group into the 36th torsion pressure roller group
Bottom roll is rotated with same 0.6rad/s rotating speeds around wherein axis both clockwise direction；Blank reverses pressure roller group rolling through the 36th
Enter the first shaping roll group 5 afterwards and carry out rolling, the first shaping roll group 5 is located at the 36th and reverses pressure roller group discharging direction,
Plane where two roll mandrels is with plan range where two roll mandrels of the 36th torsion pressure roller group in first shaping roll group 5
150mm, the first shaping roll group 5 includes two structure identical rolls, and diameter is 100mm, and width is 60mm, its shape roll shape
Face is circle, a diameter of 36mm, and the interface of roll shape was the center of circle and perpendicular to the section of roll radial direction, the first shaping roll group
5 topping rolls are rotated in an anti-clockwise direction with 0.669rad/s rotating speeds around its axis, and the bottom roll of the first shaping roll group 5 is with same
0.669rad/s rotating speeds are rotated around wherein axis both clockwise direction；It is whole that blank enters second after the rolling of the first shaping roll group 5
Shape roll stacks 6 carry out rolling, and the second shaping roll group 6 is located at the first shaping roll group 5 discharging direction roll, the second shaping roll
Plane where two roll mandrels and plan range where two roll mandrels of the first shaping roll group 5 are 150mm, the second shaping in group 6
Roll stacks 6 include two structure identical rolls, and diameter is 100mm, and width is 55mm, and its shape roll shape face is circle, diameter
For 35mm, the interface of shape groove was the center of circle and perpendicular to the section of roll radial direction, the topping roll of the second shaping roll group 6 with
0.708rad/s rotating speeds are rotated in an anti-clockwise direction around its axis, and the bottom roll of the second shaping roll group 6 is with same 0.708rad/
S rotating speeds are rotated around wherein axis both clockwise direction.
The present embodiment carries out oval torsion sectional crush rolling, the friction between blank and 40 roll stacks to long axis blank
Coefficient is 0.3~0.4.
Example IV
This example uses the prefabricated blank of continuous variation ellipse section roll stacks rolling longaxones parts, and blank material is
20MnSi, specification isPreparing specification isPrefabricated blank.
Blank one end is preformed with an a diameter of 20mm first, length be 30mm and andDiameter smooth transition
Bite section, a length of 30mm of changeover portion；By blank heating to l020 DEG C, blank then must be processed into end and imported by importing roll stacks 2
And starting roll-in, the structure for importing two rolls in roll stacks 2 is identical, and diameter is 80mm, and width is 50mm；Import roll stacks
The roll shape hole section of 2 intermediary forms section is circle, a diameter of 23mm, the interface of roll shape be the center of circle and perpendicular to roll radially
Section；Import topping roll in roll stacks 2 to rotate in an anti-clockwise direction around its axis with 6.25rad/s rotating speeds, and import roll
Bottom roll is rotated with same 6.25rad/s rotating speeds around wherein axis both clockwise direction in group 2；Blank is through importing the rolling of roll stacks 2
Enter forming rolls group 3 afterwards and carry out rolling, forming rolls group 3, which is located at, imports the discharging of roll stacks 2 direction, and forming rolls group 3 includes
Two structure identical rolls, diameter is 80mm, width be in 50mm, forming rolls group 3 plane where two roll mandrels with leading
Plan range where entering two roll mandrels of roll stacks 2 is 150mm, and its roll shape hole section of forming rolls group 3 is ellipse, ellipse short shaft
Long 20mm, major axis is 26.45mm, and roll shape hole section is using major axis as interface, and the topping roll of forming rolls group 3 is turned with 6.25rad/s
Speed is rotated in an anti-clockwise direction around its axis, and it is suitable around its axis with same 6.25rad/s rotating speeds to shape the bottom roll of roll stacks 3
Clockwise is rotated.
Enter to reverse in the progress rolling of pressure roller group 4, the present embodiment after the shaped rolling of roll stacks 3 of blank and use 36 pairs
Pressure roller group is reversed, detailed process includes：
Enter first after the shaped rolling of roll stacks 3 of blank and reverse pressure roller group progress rolling, the first torsion pressure roller group is located at
The discharging of forming rolls group 3 direction, first, which reverses pressure roller group, includes two rolls, and diameter is 80mm, and width is 50mm, and first reverses
Plane where two roll mandrels and plan range where two roll mandrels of forming rolls group 3 are 150mm in pressure roller group, and first reverses pressure
Its roll shape hole section of roller group is oval, the long 20mm of ellipse short shaft, and major axis is 26.45mm, and oval major axis is radially pressed from both sides with roll
Angle is 80 °, and the interface of roll shape was elliptical center and perpendicular to the section of roll radial direction, first reverse pressure roller group topping roll with
6.25rad/s rotating speeds are rotated in an anti-clockwise direction around its axis, and first reverses pressure roller group bottom roll with same 6.25rad/s turns
Speed is rotated around wherein axis both clockwise direction；Base roll shape is rolled, and second, which reverses pressure roller group, is located at the first torsion pressure roller group discharging direction,
Second, which reverses pressure roller group, includes two rolls, and diameter is 80mm, and width is 50mm, and second reverses two roll mandrel institutes in pressure roller group
It is 150mm, the second torsion pressure roller group roll shape hole section in plane and plan range where the first two roll mandrels for reversing pressure roller group
For ellipse, the long 20mm of ellipse short shaft, major axis is 26.45mm, and oval major axis and roll radial direction angle is 70 °, two roller roll shapes
Interface be elliptical center and perpendicular to the section of roll radial direction, second reverses pressure roller group topping roll is turned with 6.25rad/s
Speed is rotated in an anti-clockwise direction around its axis, and second reverses pressure roller group bottom roll with same 0.6rad/s rotating speeds around its axis
Rotationally clockwise；Blank reverses pressure roller group to the 36th torsion pressure roller group through the 3rd again successively and carries out rolling, and the 3rd turns round
Turn pressure roller group into the 36th torsion pressure roller group, each group roll is located at upper one group of discharging direction, and each group roll is located at upper one
The discharging direction of group, each group roller diameter is 80mm, and width is plane where 50mm, each group roll axis and a upper roll
The distance of plane where the roll axis of group is 150mm, and each group roller type hole section is ellipse, and ellipse short shaft is long
20mm, major axis is 26.45mm, and oval major axis reduces 10 ° successively with its roll radial direction angle, and the interface of shape groove was oval
Center and perpendicular to the section of roll radial direction, the 3rd reverse pressure roller group to the 36th reverse the topping roll in pressure roller group with
6.25rad/s rotating speeds are rotated in an anti-clockwise direction around its axis, and the 3rd reverses pressure roller group into the 36th torsion pressure roller group
Bottom roll with same 6.25rad/s rotating speeds around wherein axis both clockwise direction rotate；Blank reverses pressure roller group through the 36th
Enter the first shaping roll group 5 after rolling and carry out rolling, the first shaping roll group 5 is located at the 36th and reverses pressure roller group discharging side
To the first shaping roll group 5 includes two structure identical rolls, and diameter is 80mm, and width is 50mm, its roll shape hole section
For circle, a diameter of 22mm, the interface of roll shape was the center of circle and perpendicular to the section of roll radial direction, the first shaping roll group 5
Topping roll is rotated in an anti-clockwise direction with 8.07rad/s rotating speeds around its axis, and the bottom roll of the first shaping roll group 5 is with same
8.07rad/s rotating speeds are rotated around wherein axis both clockwise direction；Blank enters the second shaping after the rolling of the first shaping roll group 5
Roll stacks 6 carry out rolling, and the second shaping roll group 6 is located at the first shaping roll group 5 discharging direction roll, the second shaping roll group
6 include two structure identical rolls, and diameter is 80mm, and width is 50mm, and its roll shape hole section is circle, a diameter of
20mm, the interface of roll shape was the center of circle and perpendicular to the section of roll radial direction, the topping roll of the second shaping roll group 6 with
9.77rad/s rotating speeds are rotated in an anti-clockwise direction around its axis, and the bottom roll of the second shaping roll group 6 is with same 9.77rad/s
Rotating speed is rotated around wherein axis both clockwise direction.
The present embodiment carries out oval torsion sectional crush rolling, the friction between blank and 40 roll stacks to long axis blank
Coefficient is 0.3~0.4.
By testing prefabricated blank made from various embodiments of the present invention, invention the inventive method can be greatly improved continuously
The plastic deformation of blank, relatively conventional method, the present invention can substantially reduce equipment load, and the continuous big modeling to blank can be achieved
Property deformation processing, by the present invention implementations can make blank reach more than 1 large plastometric set, the present invention can overcome tradition add
Work deflection is not enough, the shortcomings of load is big, can realize and material refined crystalline strengthening is acted on, so as to improve intensity and the improvement of material
The defects such as microstructure Micro-v oid, space, improve the overall performance of material.
Claims (10)
1. a kind of continuous variation ellipse section roll milling apparatus, it is characterised in that：Including spaced some to roll stacks, each pair is rolled
Roller group is constituted by topping roll and bottom roll, is opened up relative groove on topping roll and bottom roll, is formed for roll stock
(1) roll shape hole；
Roll stacks include the importing roll stacks (2), forming rolls group (3), torsion roll stacks (4) sequentially coaxially set from front to back
With shaping roll group, wherein, it is circular, the roll shape of forming rolls group (3) to import the roll shape hole of roll stacks (2) and shaping roll group
Hole is ellipse；
Roll stacks (4) are reversed including some pairs and roll shape hole is ellipse, and from front to back, adjacent torsion roll stacks (4)
There is anglec of rotation α between oval major axis on roll shape hole, last roll shape hole and forming rolls group to reversing roll stacks (4)
(3) transverse in roll shape hole is parallel.
2. a kind of continuous variation ellipse section roll milling apparatus according to claim 1, it is characterised in that：I-th pair reverses roll
The topping roll of group (4) and the line of centres of bottom roll are Li；I-th pair reverse on the roll shape hole of roll stacks (4) oval major axis with
Line of centres LiBetween there is angle thetai, i=1,2 ..., n, n ＞ 1；α=θi+1-θi, α is at 10~20 °.
3. a kind of continuous variation ellipse section roll milling apparatus according to claim 1, it is characterised in that：Forming rolls group (3)
The ratio between consistent with the oval size for reversing roll stacks (4) and oval major axis and short axle are 1.17~1.6.
4. a kind of continuous variation ellipse section roll milling apparatus according to claim 1, it is characterised in that：Shaping roll group includes
The the first shaping roll group (5) and the second shaping roll group (6) set gradually from front to back.
5. a kind of continuous variation ellipse section roll milling apparatus according to claim 4, it is characterised in that：Import roll stacks (2)
Roll shape hole diameter of section be R1, reverse roll stacks (4) roll shape hole cross-section minor axis length be D, the first shaping roll group (5)
Roll shape hole diameter of section is R2, and the roll shape hole diameter of section of the second shaping roll group (6) is R3, wherein, D, R3 are and prefabricated blank
Aimed dia it is equal, R3, R2 and R1 increase successively.
6. a kind of continuous variation ellipse section roll milling apparatus according to claim 5, it is characterised in that：R2 is bigger than R3 by 1~
5mm, R1 1~5mm bigger than R2.
7. a kind of continuous variation ellipse section roll milling apparatus according to claim 1, it is characterised in that：Between adjacent rollers group
At intervals of 150~300mm.
8. a kind of continuous variation ellipse section base side carried out using continuous variation ellipse section roll milling apparatus described in claim 1
Method, it is characterised in that：Comprise the following steps：
Step one：First blank (1) to be processed is preformed with biting section and smooth changeover portion, wherein biting the diameter of section
It is equal with the aimed dia of prefabricated blank；
Step 2：By blank (1) bite section by importing roll stacks (2) import and rolling, then sequentially pass through forming rolls
Group (3), torsion roll stacks (4) and shaping roll group rolling, complete continuous variation ellipse section base.
9. continuous variation ellipse section blank-making method according to claim 8, it is characterised in that：In step 2 blank (1) and
Coefficient of friction between roll stacks is 0.3~0.5.
10. continuous variation ellipse section blank-making method according to claim 8, it is characterised in that：Shaping roll group include from
The the first shaping roll group (5) and the second shaping roll group (6) set gradually after going to；In roll milling process, roll stacks (2) are imported
Angular speed be ω 1, the angular speed of forming rolls group (3) is ω 2, and the angular speed for reversing roll stacks (4) is ω 3, the first shaping
The angular speed of roll stacks (5) is ω 4, and the angular speed of the second shaping roll group (6) is ω 5, wherein, the ＜ ω 4 of ω 1≤ω 2=ω 3
＜ ω 5.
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| JP2001321828A (en) * | 2000-05-11 | 2001-11-20 | Daido Steel Co Ltd | Method of manufacturing for metallic wire |
| CN2451247Y (en) * | 2000-11-28 | 2001-10-03 | 孟继安 | Spital warp oval section heat exchange tube parallel-axis rolling mill machine and tool |
| CN101823085A (en) * | 2009-03-04 | 2010-09-08 | 西北工业大学 | Variable-channel extrusion die and forming method |
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Effective date of registration: 20220905 Address after: 710089 No. 3, Gongye Road, aviation high tech industrial base, Yanliang District, Xi'an City, Shaanxi Province Patentee after: XI'AN YUANFEI AEROTECHNICS DEVELOPMENT CO.,LTD. Address before: 710064 Shaanxi province Xi'an Beilin District South Second Ring Road No. 33 in the middle Patentee before: CHANG'AN University |