CN107243583B - 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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- CN107243583B CN107243583B CN201710608327.0A CN201710608327A CN107243583B CN 107243583 B CN107243583 B CN 107243583B CN 201710608327 A CN201710608327 A CN 201710608327A CN 107243583 B CN107243583 B CN 107243583B
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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
-
- 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
Abstract
The present invention relates to a kind of continuous variation ellipse section roll milling apparatus and blank-making methods, including spaced several pairs of roll stacks, each pair of roll stacks are made of topping roll and bottom roll, and opposite groove is opened up on topping roll and bottom roll, form the roll shape hole for being used for roll stock；Roll stacks include the importing roll stacks being sequentially coaxially arranged from front to back, forming rolls group, torsion roll stacks and shaping roll group, wherein the roll shape hole for importing roll stacks and shaping roll group is circle, and the roll shape hole of forming rolls group is ellipse；Torsion roll stacks include several pairs and roll shape hole is ellipse, and from front to back, there is rotation angle between oval long axis on the roll shape hole of adjacent torsion roll stacks, last is parallel to the transverse in the roll shape hole of torsion roll stacks and the roll shape hole of forming rolls group.It can be realized the Continuous maching to axial workpiece blank in the present invention, realize material plasticity deformation, reduce equipment load requirement, improve the overall performance of blank.
Description
Technical field
The present invention relates to the cold and hot working fields of metal material, and in particular to a kind of continuous variation ellipse section roll milling apparatus and
Blank-making method.
Background technique
Longaxones parts have very important status in the industrial production, such as auto industry, aerospace, machine-building
Etc. in industries, undertake the critical function in mechanized equipment, be mainly used for transmission force and movement in machinery, support other zero
Part.Its intensity requirement is therefore higher, but in the process such as metallurgy, casting, forging, material internal often has shrinkage cavity, dredges
Pine is mingled with, is segregated, the tissue defects such as coarse grains, and fracture crack from these position forming cores and is grown up first, be easy to cause axis
The failure of class part influences the use of part.The forging permeability of forging stock is thus improved using forging technology, is forged inside condensation material
Loose, microdefect improves the tissue defects such as segregation and coarse grains, to improve the service performance of axial workpiece and using reliable
Property.
For the forged article technique and method of axis class blank, research both domestic and external is more mature, and conventional mainly has upsetting
Pull out technique and extrusion process.But the limited deformation that single upsetting pull technique generates blank is unfavorable for improving the interior tissue of blank,
And it be easy to cause the external margin of blank cracked in processing, influence product quality.And conventional extrusion technique, required equipment
It involves great expense, tonnage and base size cannot be too big, and blank cross section deformation uniformity is poor, and rely primarily on section and reduce to improve
Deformation extent, for big specification forging, the blank material needed is oversized, high production cost, while requiring mold bearing strength
Greatly, the blank center portion and edge deformation degree after more crucially processing are uneven.
In recent years, it much constantly generates about new method, the new technology for improving material structure performance, is such as become using big plasticity
Shape (SPD) method carrys out refiner material crystal grain, improves structure property, and common method is Equal Channel Angular Pressing (Equal Channel
Angular Press, ECAP).If the patent of Publication No. CN201371172 proposes a kind of variable-channel extrusion die, however it is right
In Machining of Shaft-type Parts, there is certain deficiency in this method, and on the one hand big due to squeezing tonnage, this method is difficult to realize, another party
Face, processing continuity are poor.Furthermore the patent of Publication No. CN201711480U discloses a kind of using oval cross section torsion
Come improve forged shaft forging permeability process, but its Continuous maching needs further increase.
Summary of the invention
It is an object of the invention to overcome problems of the prior art, a kind of continuous variation ellipse section rolling dress is provided
It sets and blank-making method, can be realized the Continuous maching to axial workpiece blank, the variable conduit to blank is realized by roller combination
Deformation, can refiner material crystal grain, improve the overall performance of blank.
In order to achieve the above object, the present invention adopts the following technical scheme:
Including spaced several pairs of roll stacks, each pair of roll stacks are made of topping roll and bottom roll, topping roll and
Opposite groove is opened up on bottom roll, forms the roll shape hole for being used for roll stock；
Roll stacks include the importing roll stacks being sequentially coaxially arranged from front to back, forming rolls group, torsion roll stacks and whole
Shape roll stacks, wherein the roll shape hole for importing roll stacks and shaping roll group is circle, and the roll shape hole of forming rolls group is ellipse
Shape；
Torsion roll stacks include several pairs and roll shape hole is ellipse, and from front to back, the roller of adjacent torsion roll stacks
There is rotation angle [alpha] between oval long axis in type hole, last is to the roll shape hole of torsion roll stacks and the roll shape of forming rolls group
The transverse in hole is parallel.
Further, the topping roll of i-th pair torsion roll stacks and the line of centres of bottom roll are Li；I-th pair reverses roll
Elliptical long axis and line of centres L on the roll shape hole of groupiBetween there are angle thetasi, i=1,2 ..., n, n > 1；α=θi+1-θi, α
At 10~20 °.
Further, forming rolls group is consistent with the torsion oval size of roll stacks, and the long axis and short axle of ellipse
The ratio between 1.17~1.6.
Further, shaping roll group includes the first shaping roll group set gradually from front to back and the second shaping roll
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
Degree is D, and 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 are sequentially increased.
Further, the big 1~5mm of R2 ratio R3 big 1~5mm, R1 ratio R2.
Further, between adjacent rollers group between be divided into 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, packet
Include following steps:
Blank to be processed: being preformed with bite section and smooth changeover portion first by step 1, wherein biting the straight of section
Diameter and the aimed dia of prefabricated blank are equal；
Step 2: by blank bite section by importing roll stacks import and rolling, then successively by 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 set gradually from front to back and the second shaping roll
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≤
3 < ω of ω 2=ω, 4 < ω 5.
Compared with prior art, the invention has the following beneficial technical effects:
The torsion roll stacks that continuous variation ellipse section is used in apparatus of the present invention carry out oval torsion section to long axis blank
Rolling is squeezed, can be realized the Continuous maching to axial workpiece blank, by caused by angle difference between roll stacks oval cross section
Shear action realizes material plasticity deformation；Roll stacks are realized by cooperation rolling to blank Continuous maching；Pass through multiple roll stacks
Combination, to reduce equipment load requirement, processing continuity is good；It is realized by roller combination and the variable conduit of blank is deformed,
Can refiner material crystal grain, blank can be made to reach 1 or more large plastometric set, improve the overall performance of blank.
Further, rotation angle [alpha] 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 torsion oval size of roll stacks in the present invention, and long axis and short axle
The ratio between 1.17~1.6, effectively prevent ellipse long and short shaft to cause that deformation drag is excessive and axis is more inadequate than too small deflection than excessive
The problem of.
Further, the present invention in be arranged two shaping roll groups, can preferably shaping, guarantee prefabricated blank can reach
Aimed dia.
The method of the present invention uses the long axis blank of continuous variation ellipse section rolling system, improves long axis class blank forming quality, gram
It is big in axial workpiece forgeability or Equal Channel Angular Pressing in forming process material present in prior art technology has been taken
The deficiency of the long blank Continuous maching of specification.
Further, the angular speed in the present invention between each roll stacks is gradually increased, and can be effectively prevent in roll milling process
The delay of middle blank or blank necking rupture etc..
Detailed description of the invention
Fig. 1 is the structure chart of successive roll group；
Fig. 2 (a) is the main view for the importings roll stacks that roll shape is circle, and Fig. 2 (b) is the a-a of importing roll stacks to cross-sectional view,
Fig. 2 (c) is the top view for importing roll stacks；
Fig. 3 (a) is the main view that roll shape is elliptical 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 elliptical torsion roll structure figure；
Fig. 5 (a) is the main view for the first shaping roll group that roll shape is circle, and Fig. 5 (b) is the d-d of the first shaping roll group
To cross-sectional view, Fig. 5 (c) is the top view of the first shaping roll group；
Fig. 6 (a) is the main view for the second shaping roll group that roll shape is circle, and Fig. 6 (b) is the e-e of the second shaping roll group
To cross-sectional view, Fig. 6 (c) is the top view of the second shaping roll group.
Wherein: 1- blank；2- imports roll stacks；3- forming rolls group；4- reverses roll stacks；5- the first shaping roll group；
6- the second shaping roll group.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.
Referring to Fig. 1, the present invention includes spaced several pairs of roll stacks, and each pair of roll stacks are by topping roll and bottom roll
It forms, opposite groove is opened up on topping roll and bottom roll, form the roll shape hole for being used for roll stock 1.Adjacent rollers group it
Between between be divided into 150~300mm.
The used multiple groups continuous rolling combination of the present invention, roll stacks mainly include the roll shape being sequentially coaxially arranged from front to back
For round importing roll stacks 2, roll shape is elliptical forming rolls group 3, and roll shape is elliptical torsion roll stacks 4 and roll shape is round
Shaping roll group.
(a) to Fig. 2 (c) referring to fig. 2, imports that roll stacks 2 are identical by two structures, and roll shape is the roll composition of circle, roll shape
Interface was the section of the center of circle and diameter perpendicular to 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 elliptical roll composition, is rolled
Roller interface is the long axis cross-section perpendicular to the oval roll shape of roll radial direction.
Referring to fig. 4, torsion roll stacks 4 are including several 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 oval 3 type groove area equation of forming rolls group 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, be overlapped again unanimously with the roll shape of forming rolls group 3,
I.e. last is parallel to the transverse in the roll shape hole of torsion 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；The roll shape of i-th pair torsion roll stacks 4
Elliptical long axis and line of centres L on holeiBetween there are angle thetasi, i=1,2 ..., n, n > 1；α=θi+1-θi, α 10~
20°。
Forming rolls group 3 is consistent with the torsion oval size of roll stacks 4, and the ratio between the long axis of ellipse 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 bigger compared with the latter, the roll shape interface of two shaping roll groups was center of circle diameter and perpendicular to rolling
Roller diameter to section.
Roll stacks 2 are imported, forming rolls group 3 reverses roll stacks 4, and each group is successively each along it to roll in shaping roll group
It is lineal layout from the roll shape line of centres, and each roll shape center spacing is kept constant.The roll shape hole section for importing roll stacks 2 is straight
Diameter is R1, and the roll shape hole cross-section minor axis length of torsion 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 are R3, wherein D, R3 are equal with the aimed dia of prefabricated blank, R3,
R2 and R1 are sequentially increased, and the big 1~5mm of R2 ratio R3 big 1~5mm, R1 ratio R2.
The main course of work of the present invention and principle:
When carrying out machining deformation to blank 1, first blank 1 to be processed is preformed with and bites section and smooth changeover portion,
The aimed dia of the diameter and prefabricated blank that wherein bite section is equal；Roll stacks 2 are imported, forming rolls group 3 reverses roll stacks 4, whole
Upper roller in shape roll stacks is rotated around respective central axes with a fixed angular speed in the counterclockwise direction, imports roll stacks 2, forming is rolled
Roller group 3, reverses roll stacks 4, and the lower roll in shaping roll group is turned around respective central axes with a fixed angular speed along clockwise direction
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, at
The angular speed of shape roll stacks 3 is ω 2, and the angular speed of torsion 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 relationship is 1≤ω of ω 2=ω, 3 < ω, 4 < ω 5, passes through such angular speed
Setting can be avoided the delay of blank or blank necking rupture etc. in roll milling process.
The present invention can be realized the Continuous maching to axial workpiece blank, realize the variable conduit to blank by roller combination
Deformation, can refiner material crystal grain, improve the overall performance of 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.
First by 1 one end of blank be preformed with diameter be 40mm, 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 and 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, width 70mm；Import roll stacks 2
Roll shape hole section is circle, and diameter 48mm, 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 revolving speed around its axis in roller group 2, and imports in roll stacks 2 bottom roll with same
Sample 0.57rad/s revolving speed around its axis rotationally clockwise；Blank enters forming rolls group 3 after importing 2 rolling of roll stacks
Rolling is carried out, forming rolls group 3, which is located at, imports 2 discharging direction of roll stacks, and forming rolls group 3, which includes that two structures are identical, rolls
Roller, diameter are 100mm, width 70mm, and plane where two roll mandrels is rolled with the two of importing roll stacks 2 in 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 long axis is
57.6mm, using long axis as interface, 3 topping roll of forming rolls group is inverse around its central axes with 0.74rad/s revolving speed in roll shape hole section
Clockwise rotation, and shape 3 bottom roll of roll stacks and rotated with 0.74rad/s revolving speed around wherein axis both clockwise direction.
Enter torsion pressure roller group 4 after shaped 3 rolling of roll stacks of blank and carry out rolling, uses 24 pairs in the present embodiment
Pressure roller group is reversed, detailed process includes:
Enter the first torsion pressure roller group after shaped 3 rolling of roll stacks of blank and carry out rolling, the first torsion pressure roller group is located at
3 discharging direction of forming rolls group, the first torsion pressure roller group include two rolls, and diameter is 100mm, and width 70mm, first turns round
Turning plan range where two roll mandrels of plane and forming rolls group 3 where two roll mandrels in pressure roller group is 150mm, the first torsion
Its roll shape hole section of pressure roller group is ellipse, and the long 40mm of ellipse short shaft, long axis 57.6mm, elliptical long axis and roll radially press from both sides
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 revolving speed is rotated in an anti-clockwise direction around its central axes, and first torsion pressure roller group bottom roll with 0.74rad/s revolving speed around
Wherein axis both clockwise direction rotates；Base roll shape is rolled, second torsion roll stacks be located at first torsion pressure roller group discharging direction, second
Reversing roll stacks includes two rolls, and diameter is 100mm, and width 70mm, second reverses in roll stacks where two roll mandrels
Plane is 150mm with plan range where two roll mandrels of the first torsion pressure roller group, and the second torsion roll stacks roll shape hole section is
Ellipse, the long 40mm of ellipse short shaft, long axis 57.6mm, elliptical long axis and roll radial direction angle are 60 °, point of two roller roll shapes
Interface was elliptical center and perpendicular to the section of roll radial direction, the second torsion roll stacks topping roll with 0.74rad/s revolving speed around
Its central axes rotates in an anti-clockwise direction, and second reverses roll stacks bottom roll with 0.74rad/s revolving speed around wherein axis both clockwise
Direction rotation；Blank successively reverses pressure roller group to the 24th torsion pressure roller group through third again and carries out rolling, and third 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 70mm, is at a distance from plane where roll axis of the plane with a upper roll stacks where each group roll axis
150mm, each group roller type hole section are ellipse, the long 40mm of ellipse short shaft, long axis 57.6mm, elliptical long axis and its
Roll radial direction angle successively reduces 15 °, and the interface of roll shape was elliptical center and perpendicular to the section of roll radial direction, and third is turned round
Turn topping roll of the pressure roller group into the 24th torsion pressure roller group counterclockwise to turn with 0.74rad/s revolving speed around its central axes
It is dynamic, and bottom roll is rotated with 0.74rad/s revolving speed around wherein axis both clockwise direction；Blank is through the 24th torsion pressure roller group roller
Enter the first shaping roll group 5 after rolling and carry out rolling, the first shaping roll group 5 is located at the 24th torsion pressure roller group discharging side
To plane where two roll mandrels and plane separation where two roll mandrels of the 24th torsion pressure roller group in the first shaping roll group 5
From for 150mm, the first shaping roll group 5 includes the identical roll of two structures, and diameter is 100mm, width 70mm, roller
Type hole section is circle, diameter of a circle 45mm, and the interface of roll shape was the center of circle and perpendicular to the section of roll radial direction, first
5 topping roll of shaping roll group is rotated in an anti-clockwise direction with 0.844rad/s revolving speed around its central axes, and under the first shaping roll group 5
Roll is rotated with 0.844rad/s revolving speed around wherein axis both clockwise direction；Blank enters after 5 rolling of the first shaping roll group
Second shaping roll group 6 carries out rolling, and the second shaping roll group 6 is located at 5 discharging direction of the first shaping roll group, and the second shaping is rolled
Plan range is 150mm where two roll mandrels of plane and the first shaping roll group 5 where two roll mandrels in roller group 6, and second is whole
Shape roll stacks 6 include the identical roll of two structures, and diameter is 100mm, and width 60mm, roll shape hole section is circle, circle
Diameter be 40mm, the interface of roll shape was the center of circle and perpendicular to the section of roll radial direction, 6 topping roll of the second shaping roll group
It is rotated in an anti-clockwise direction with 1.06rad/s revolving speed around its central axes, and 5 bottom roll of the second shaping roll group 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 to long axis blank, the friction between blank and 28 roll stacks
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.
First by 1 one end of blank be preformed with a diameter be 45mm, 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, width 90mm；Import roll
Group 2 intermediate shaped segments roll shape hole section be circle, diameter 56mm, the interface of roll shape be the center of circle and perpendicular to roll radial direction
Section；It imports topping roll in roll stacks 2 to rotate in an anti-clockwise direction with 0.57rad/s revolving speed around its central axes, and imports roll
Bottom roll is rotated with same 0.57rad/s revolving speed around wherein axis both clockwise direction in group 2；Blank is through importing 2 rolling of roll stacks
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
Include the identical roll of two structures, diameter is 200mm, width 100mm, plane where two roll mandrels in forming rolls group 3
It is 300mm with the two roll mandrels place plan range for importing roll stacks 2,3 roll shape hole section of forming rolls group is ellipse, and short axle is long
45mm, long axis 70mm, roll shape hole section is using long axis as interface, and 3 topping roll of forming rolls group is with 0.74rad/s revolving speed around it
Central axes rotate in an anti-clockwise direction, and shape 3 bottom roll of roll stacks with same 0.74rad/s revolving speed around wherein axis both clockwise side
To rotation.
Enter torsion pressure roller group 4 after shaped 3 rolling of roll stacks of blank and carry out rolling, is turned round in the present embodiment using 18 Duis
Turn pressure roller group, detailed process includes:
Enter the first torsion pressure roller group after shaped 3 rolling of roll stacks of blank and carry out rolling, the first torsion pressure roller group is located at
The discharging direction of forming rolls group 3, the first torsion pressure roller group includes two rolls, and diameter is 200mm, width 100mm, and first
Reversing plane where two roll mandrels and plan range where two roll mandrels of forming rolls group 3 in pressure roller group is 300mm, and first turns round
Turning pressure roller group roll shape hole section is oval, the long 45mm of short axle, long axis 70mm, and elliptical long 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, the first torsion pressure roller group topping roll with
0.74rad/s revolving speed is rotated in an anti-clockwise direction around its central axes, and the first torsion pressure roller group bottom roll is turned with same 0.74rad/s
Speed is rotated around wherein axis both clockwise direction；Base roll shape is rolled, and the second torsion pressure roller group is located at the first torsion pressure roller group discharging direction,
Second torsion pressure roller group includes two rolls, and diameter is 200mm, and width 100mm, second reverses two roll mandrels in pressure roller group
Place plane is 300mm, the second torsion pressure roller group roll shape hole section with plan range where the first torsion two roll mandrel of pressure roller group
For ellipse, the long 45mm of ellipse short shaft, long axis 70mm, elliptical long axis and roll radial direction angle are 50 °, point of two roller roll shapes
Interface was elliptical center and perpendicular to the section of roll radial direction, the second torsion pressure roller group topping roll with 0.74rad/s revolving speed around
Its central axes rotates in an anti-clockwise direction, and the second torsion pressure roller group bottom roll is suitable around its central axes with same 0.74rad/s revolving speed
Clockwise rotation；Blank successively reverses pressure roller group to the 18th torsion pressure roller group through third again and carries out rolling, third torsion 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 100mm, is at a distance from plane where roll axis of the plane with a upper roll stacks where each group roll axis
300mm, each group roller type hole section are ellipse, the long 45mm of ellipse short shaft, long axis 70mm, elliptical long axis and upper one
Group roll shape long axis angle successively reduces 20 °, and the interface of roll shape was elliptical center and perpendicular to the section of roll radial direction, third
Topping roll of the pressure roller group into the 18th torsion pressure roller group is reversed counterclockwise to turn with 0.74rad/s revolving speed around its central axes
It is dynamic, and third reverses bottom roll of the pressure roller group into the 18th torsion pressure roller group with same 0.74rad/s revolving speed around its central axes
Rotationally clockwise；Blank enters the first shaping roll group 5 after the 18th torsion pressure roller group rolling and carries out rolling, and first is whole
Shape roll stacks 5 are located at the 18th torsion pressure roller group discharging direction, plane and the tenth where two roll mandrels in the first shaping roll group 5
Plan range where two roll mandrels of eight torsion pressure roller groups is 300mm, and the first shaping roll group 5, which includes that two structures are identical, rolls
Roller, diameter are 200mm, and width 70mm, roll shape hole section is circle, and diameter 48mm, the interface of roll shape was round
The heart and perpendicular to the section of roll radial direction, 5 topping roll of the first shaping roll group is with 0.844rad/s revolving speed around its central axes inverse time
Needle direction rotation, and 5 bottom roll of the first shaping roll group with same 0.844rad/s revolving speed around its axis rotationally clockwise；
Blank enters the second shaping roll group 6 after 5 rolling of the first shaping roll group and carries out rolling, and the second shaping roll group 6 is located at the
One shaping roll group, 5 discharging direction roll, plane and the first shaping roll group 5 where two roll mandrels in the second shaping roll group 6
Two roll mandrels where plan range be 300mm, the second shaping roll group 6 includes the identical roll of two structures, and diameter is
200mm, width 70mm, roll shape hole section are circle, diameter 45mm, and the interface of roll shape was the center of circle and perpendicular to rolling
Roller diameter to section, 6 topping roll of the second shaping roll group rotates in an anti-clockwise direction with 1.06rad/s revolving speed around its central axes, and
Second shaping roll group, 6 bottom roll is rotated with same 1.06rad/s revolving speed around wherein axis both clockwise direction.
The present embodiment carries out oval torsion sectional crush rolling to long axis blank, the friction between blank and 22 roll stacks
Coefficient is 0.3~0.5.
Embodiment three
This example uses the prefabricated blank of continuous variation ellipse section roll stacks rolling longaxones parts, blank material 40Cr
Steel, specification arePreparing specification isPrefabricated blank.
First by blank one end be preformed with a diameter be 35mm, 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, width 60mm；Import roll
The roll shape hole section of 2 intermediary form sections of group is circle, and diameter 38mm, the interface of roll shape was the center of circle and perpendicular to roll diameter
To section；It imports topping roll in roll stacks 2 to rotate in an anti-clockwise direction with 0.6rad/s revolving speed around its central axes, and imports roll
Bottom roll is rotated with same 0.6rad/s revolving speed around wherein axis both clockwise direction in group 2；Blank is after importing 2 rolling of roll stacks
Rolling is carried out into forming rolls group 3, forming rolls group 3, which is located at, imports 2 discharging direction of roll stacks, and forming rolls group 3 includes two
The identical roll of a structure, diameter are 100mm, width 60mm, plane where two roll mandrels and are imported in forming rolls group 3
Plan range where two roll mandrels of roll stacks 2 is 150mm, its roll shape hole section of forming rolls group 3 is ellipse, and ellipse short shaft is long
35mm, long axis 41.26mm, roll shape hole section using long axis as interface, 3 topping roll of forming rolls group with 0.6rad/s revolving speed around
Its central axes rotates in an anti-clockwise direction, and shapes 3 bottom roll of roll stacks with same 0.6rad/s revolving speed around wherein axis both clockwise
Direction rotation.
Enter torsion pressure roller group 4 after shaped 3 rolling of roll stacks of blank and carry out rolling, uses 36 pairs in the present embodiment
Pressure roller group is reversed, detailed process includes:
Enter the first torsion pressure roller group after shaped 3 rolling of roll stacks of blank and carry out rolling, the first torsion pressure roller group is located at
3 discharging direction of forming rolls group, the first torsion pressure roller group include two rolls, and diameter is 100mm, and width 60mm, first turns round
Turning plan range where two roll mandrels of plane and forming rolls group 3 where two roll mandrels in pressure roller group is 150mm, the first torsion
Its roll shape hole section of pressure roller group is ellipse, and the long 35mm of ellipse short shaft, long axis 41.26mm, elliptical long axis and roll are radial
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
It is rotated in an anti-clockwise direction with 0.6rad/s revolving speed around its central axes, and the first torsion pressure roller group bottom roll is turned with same 0.6rad/s
Speed is rotated around wherein axis both clockwise direction；Base roll shape is rolled, and the second torsion pressure roller group is located at the first torsion pressure roller group discharging direction,
Second torsion pressure roller group includes two rolls, and diameter is 100mm, and width 60mm, second reverses two roll mandrels in pressure roller group
Place plane is 150mm with plan range where two roll mandrels of the first torsion pressure roller group, and the second torsion pressure roller group roll shape hole is cut
Face is ellipse, and the long 35mm of ellipse short shaft, long axis 41.26mm, elliptical long axis and roll radial direction angle are 70 °, two rolls
The interface of roll shape was elliptical center and perpendicular to the section of roll radial direction, and the second torsion pressure roller group topping roll is with 0.6rad/s
Revolving speed is rotated in an anti-clockwise direction around its central axes, and second reverses pressure roller group bottom roll with same 0.6rad/s revolving speed around its axis
Line is rotationally clockwise；Blank successively reverses pressure roller group to the 36th torsion pressure roller group through third again and carries out rolling, third
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 are 100mm, and width is 60mm, plane and upper one where each group roll axis
The distance of plane is 150mm where the roll axis of roll stacks, and each group roller type hole section is ellipse, and ellipse short shaft is long
35mm, long axis 41.26mm, elliptical long axis and its roll radial direction angle successively reduce 10 °, and the interface of roll shape was oval
Center and perpendicular to the section of roll radial direction, third reverse topping roll of the pressure roller group into the 36th torsion pressure roller group with
0.6rad/s revolving speed is rotated in an anti-clockwise direction around its central axes, and third reverses pressure roller group into the 36th torsion pressure roller group
Bottom roll is rotated with same 0.6rad/s revolving speed around wherein axis both clockwise direction；Blank is through the 36th torsion pressure roller group rolling
Entering the first shaping roll group 5 afterwards and carries out rolling, the first shaping roll group 5 is located at the 36th torsion 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 include the identical roll of two structures, and diameter is 100mm, width 60mm, shape roll shape
Face is circle, and diameter 36mm, 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 revolving speed around its central axes, and 5 bottom roll of the first shaping roll group is with same
0.669rad/s revolving speed is rotated around wherein axis both clockwise direction；It is whole that blank enters second after 5 rolling of the first shaping roll group
Shape roll stacks 6 carry out rolling, and the second shaping roll group 6 is located at 5 discharging direction roll of the first shaping roll group, the second shaping roll
Plan range where two roll mandrels of plane and the first shaping roll group 5 where two roll mandrels is 150mm, the second shaping in group 6
Roll stacks 6 include the identical roll of two structures, and diameter is 100mm, and width 55mm, shape roll shape face is circle, diameter
For 35mm, the interface of shape slot was the center of circle and perpendicular to the section of roll radial direction, 6 topping roll of the second shaping roll group with
0.708rad/s revolving speed is rotated in an anti-clockwise direction around its central axes, and 6 bottom roll of the second shaping roll group is with same 0.708rad/
S revolving speed is rotated around wherein axis both clockwise direction.
The present embodiment carries out oval torsion sectional crush rolling to long axis blank, the friction between blank and 40 roll stacks
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 arePreparing specification isPrefabricated blank.
First by blank one end be preformed with a diameter be 20mm, 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, width 50mm；Import roll stacks
The roll shape hole section of 2 intermediary form sections be circle, diameter 23mm, the interface of roll shape be the center of circle and perpendicular to roll radial direction
Section；It imports topping roll in roll stacks 2 to rotate in an anti-clockwise direction with 6.25rad/s revolving speed around its central axes, and imports roll
Bottom roll is rotated with same 6.25rad/s revolving speed around wherein axis both clockwise direction in group 2；Blank is through importing 2 rolling of roll stacks
Enter forming rolls group 3 afterwards and carry out rolling, forming rolls group 3, which is located at, imports 2 discharging direction of roll stacks, and forming rolls group 3 includes
The identical roll of two structures, diameter are 80mm, width 50mm, in forming rolls group 3 plane where two roll mandrels with lead
Plan range where entering two roll mandrels of roll stacks 2 is 150mm, its roll shape hole section of forming rolls group 3 is ellipse, ellipse short shaft
Long 20mm, long axis 26.45mm, using long axis as interface, 3 topping roll of forming rolls group is turned with 6.25rad/s in roll shape hole section
Speed is rotated in an anti-clockwise direction around its central axes, and it is suitable around its central axes with same 6.25rad/s revolving speed to shape 3 bottom roll of roll stacks
Clockwise rotation.
Enter torsion pressure roller group 4 after shaped 3 rolling of roll stacks of blank and carry out rolling, uses 36 pairs in the present embodiment
Pressure roller group is reversed, detailed process includes:
Enter the first torsion pressure roller group after shaped 3 rolling of roll stacks of blank and carry out rolling, the first torsion pressure roller group is located at
3 discharging direction of forming rolls group, the first torsion pressure roller group include two rolls, and diameter is 80mm, width 50mm, the first torsion
Plan range where two roll mandrels of plane and forming rolls group 3 where two roll mandrels is 150mm, the first torsion pressure in pressure roller group
Its roll shape hole section of roller group is ellipse, and the long 20mm of ellipse short shaft, long axis 26.45mm, elliptical long axis and roll radially press from both sides
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 revolving speed is rotated in an anti-clockwise direction around its central axes, and the first torsion pressure roller group bottom roll is turned with same 6.25rad/s
Speed is rotated around wherein axis both clockwise direction；Base roll shape is rolled, and the second torsion pressure roller group is located at the first torsion pressure roller group discharging direction,
Second torsion pressure roller group includes two rolls, and diameter is 80mm, and width 50mm, 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 two roll mandrels of the first torsion pressure roller group
For ellipse, the long 20mm of ellipse short shaft, long axis 26.45mm, elliptical long axis and roll radial direction angle are 70 °, two roller roll shapes
Interface be elliptical center and perpendicular to the section of roll radial direction, the second torsion pressure roller group topping roll is turned with 6.25rad/s
Speed is rotated in an anti-clockwise direction around its central axes, and second reverses pressure roller group bottom roll with same 0.6rad/s revolving speed around its central axes
Rotationally clockwise；Blank successively reverses pressure roller group to the 36th torsion pressure roller group through third again and carries out rolling, and third is turned 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 are 80mm, and width is 50mm, plane and a upper roll where each group roll axis
The distance of plane is 150mm where the roll axis of group, and each group roller type hole section is ellipse, and ellipse short shaft is long
20mm, long axis 26.45mm, elliptical long axis and its roll radial direction angle successively reduce 10 °, and the interface of shape slot was oval
Center and perpendicular to the section of roll radial direction, third reverse topping roll of the pressure roller group into the 36th torsion pressure roller group with
6.25rad/s revolving speed is rotated in an anti-clockwise direction around its central axes, and third reverses pressure roller group into the 36th torsion pressure roller group
Bottom roll with same 6.25rad/s revolving speed around wherein axis both clockwise direction rotate；Blank is through the 36th torsion pressure roller group
Enter the first shaping roll group 5 after rolling and carry out rolling, the first shaping roll group 5 is located at the 36th torsion pressure roller group discharging side
To the first shaping roll group 5 includes the identical roll of two structures, and diameter is 80mm, width 50mm, roll shape hole section
For circle, diameter 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 revolving speed around its central axes, and 5 bottom roll of the first shaping roll group is with same
8.07rad/s revolving speed is rotated around wherein axis both clockwise direction；Blank enters the second shaping after 5 rolling of the first shaping roll group
Roll stacks 6 carry out rolling, and the second shaping roll group 6 is located at 5 discharging direction roll of the first shaping roll group, the second shaping roll group
6 include the identical roll of two structures, and diameter is 80mm, and width 50mm, roll shape hole section is circle, and diameter is
20mm, the interface of roll shape were the center of circle and perpendicular to the section of roll radial direction, 6 topping roll of the second shaping roll group with
9.77rad/s revolving speed is rotated in an anti-clockwise direction around its central axes, and 6 bottom roll of the second shaping roll group is with same 9.77rad/s
Revolving speed is rotated around wherein axis both clockwise direction.
The present embodiment carries out oval torsion sectional crush rolling to long axis blank, the friction between blank and 40 roll stacks
Coefficient is 0.3~0.4.
As testing prefabricated blank made from various embodiments of the present invention, invention the method for the present invention can be greatly improved continuously
The plastic deformation of blank, opposite conventional method, the present invention can substantially reduce equipment load, it can be achieved that continuous big modeling to blank
Property deformation processing, the large plastometric set that implementation through the invention can make blank reach 1 or more, the present invention can overcome tradition plus
The disadvantages of work deflection is insufficient, and load is big can be realized and act on material refined crystalline strengthening, to improve the intensity and improvement of material
The defects of microstructure Micro-v oid, gap, improves the overall performance of material.
Claims (9)
1. a kind of continuous variation ellipse section roll milling apparatus, it is characterised in that: each pair of to roll including spaced several pairs of roll stacks
Roller group is made of topping roll and bottom roll, and opposite groove is opened up on topping roll and bottom roll, is formed and is used for roll stock
(1) roll shape hole；
Roll stacks include the importing roll stacks (2) being sequentially coaxially arranged from front to back, forming rolls group (3), torsion roll stacks (4)
With shaping roll group, wherein the roll shape hole for importing roll stacks (2) and shaping roll group is circle, the roll shape of forming rolls group (3)
Hole is ellipse；
Torsion roll stacks (4) includes several pairs and roll shape hole is ellipse, and from front to back, adjacent torsion roll stacks (4)
There is rotation angle [alpha] between oval long axis on roll shape hole, last is to the roll shape hole and forming rolls group for reversing roll stacks (4)
(3) transverse in roll shape hole is parallel；
Forming rolls group (3) is consistent with the torsion oval size of roll stacks (4), and the ratio between the long axis of ellipse and short axle exist
1.17~1.6.
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 roll stacks (4) roll shape hole on elliptical long axis with
Line of centres LiBetween there are angle thetasi, 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: shaping roll group includes
The the first shaping roll group (5) and the second shaping roll group (6) set gradually from front to back.
4. a kind of continuous variation ellipse section roll milling apparatus according to claim 3, it is characterised in that: import roll stacks (2)
Roll shape hole diameter of section be R1, torsion 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 are sequentially increased.
5. a kind of continuous variation ellipse section roll milling apparatus according to claim 4, it is characterised in that: R2 ratio R3 is big by 1~
Big 1~the 5mm of 5mm, R1 ratio R2.
6. a kind of continuous variation ellipse section roll milling apparatus according to claim 1, it is characterised in that: between adjacent rollers group
Between be divided into 150~300mm.
7. 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: the following steps are included:
Step 1: blank (1) to be processed is preformed with bites section and smooth changeover portion first, 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 successively pass through forming rolls
Group (3), torsion roll stacks (4) and shaping roll group rolling, complete continuous variation ellipse section base.
8. continuous variation ellipse section blank-making method according to claim 7, it is characterised in that: in step 2 blank (1) and
Coefficient of friction between roll stacks is 0.3~0.5.
9. continuous variation ellipse section blank-making method according to claim 7, it is characterised in that: shaping roll group includes in the past
The the first shaping roll group (5) and the second shaping roll group (6) set gradually backward；In roll milling process, roll stacks (2) are imported
Angular speed is ω 1, and the angular speed of forming rolls group (3) is ω 2, and the angular speed of torsion roll stacks (4) is ω 3, and the first shaping is rolled
The angular speed of roller group (5) is ω 4, and the angular speed of the second shaping roll group (6) is ω 5, wherein 3 < ω of ω 1≤ω 2=ω, 4 <
ω5。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2001321828A (en) * | 2000-05-11 | 2001-11-20 | Daido Steel Co Ltd | Method of manufacturing for metallic wire |
| CN101823085A (en) * | 2009-03-04 | 2010-09-08 | 西北工业大学 | Variable-channel extrusion die and forming method |
| CN201862645U (en) * | 2010-10-21 | 2011-06-15 | 西北工业大学 | Device for preparing variable-channel superfine-crystal copper aluminum wire |
-
2017
- 2017-07-24 CN CN201710608327.0A patent/CN107243583B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201862645U (en) * | 2010-10-21 | 2011-06-15 | 西北工业大学 | Device for preparing variable-channel superfine-crystal copper aluminum wire |
Non-Patent Citations (1)
| Title |
|---|
| 一种椭圆截面螺旋等通道挤压制备超细晶材料的新工艺;陆红亚等;《锻压装备与制造技术》;20110831(第4期);第61-65页 |
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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 |