CN109365556A - It is a kind of just to squeeze the apparatus and method that standby ultra fine grained steel bar is extruded in conjunction with rotary side - Google Patents
It is a kind of just to squeeze the apparatus and method that standby ultra fine grained steel bar is extruded in conjunction with rotary side Download PDFInfo
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- CN109365556A CN109365556A CN201811354360.6A CN201811354360A CN109365556A CN 109365556 A CN109365556 A CN 109365556A CN 201811354360 A CN201811354360 A CN 201811354360A CN 109365556 A CN109365556 A CN 109365556A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- Extrusion Of Metal (AREA)
Abstract
The present invention relates to Metal Forming technical fields, specifically, it is a kind of apparatus and method just squeezed and extruding standby ultra fine grained steel bar in conjunction with rotary side, including extruding punch, upper extrusion cylinder, bearing, lower extrusion cylinder, the support of upper extrusion cylinder, worm screw, bearing and support base.Upper extrusion cylinder forward extrusion deformed area is nonaxisymmetric structure, is transitioned into circle again by rounded transitional to ellipse, and lower extrusion cylinder uses lateral compression channel, and lower extrusion cylinder upper and lower ends use bearing support, passes through its rotation of worm drive.It the use of the method that the device prepares ultra fine grained steel bar is after first being squeezed to bar front end into lateral squeezing passage, extrusion cylinder under rotation, continuously generates bar shear-deformable while axial compression.For the device by mould structure and the common driving bar rotation of friction, deformation efficiency is high, and single pass can obtain large plastometric set in material, and refiner material tissue, suitable material range is wide, and high pressure has been pushed to turn round the industrial applications of extruding process.
Description
Technical field
The present invention relates to Metal Forming technical fields, specifically, being that a kind of just squeezing combines rotary side to extrude standby surpass
The apparatus and method of fine grain bar.
Background technique
Severe plastic deformation is that the most effective means of bulk ultrafine-grained materials are prepared by top-down methods, is opened in recent years
The severe plastic deformation technology of hair includes high pressure torsion (HPT), Equal Channel Angular Pressing (ECAP), reciprocating extrusion (CEC) etc..It is conventional high
It presses in torsion technique, laminar workpiece is placed in the die cavity of mold, and pressure head applies high pressure to workpiece, and mold or pressure head revolve simultaneously
Turning, coarse grain material can be refined to nanoscale by high pressure torsion technology, but its limitation is primarily used for the lesser workpiece of size,
Its application is restricted.How to be applied to and prepares the concern that large-size workpiece is constantly subjected to scholars.
By the retrieval discovery to existing technical literature, Yu. Ivanisenko et al. is in " Materials Science
And Engineering A " " the High Pressure Torsion Extrusion that delivers on (2016,664:247-256)
It is proposed in an as a new severe plastic deformation process " text based on conventional high-pressure torsion technique
A kind of crowded (HPTE) technology of high pressure torsion, in the art, workpiece is squeezed through a relatively turnable Combined extrusion cylinder, workpiece
The advantages of generation is shear-deformable at two extrusion cylinder faying faces, the technology is may to accumulate foot in workpiece by a time
Enough big strains.But the deficiency of the technology is that workpiece reverses the frictional force relied primarily between workpiece and extrusion cylinder, for axis pair
Extrusion cylinder is claimed easily to cause the opposite sliding between workpiece and extrusion cylinder, so that shear-deformable effect is reduced, simultaneously because shearing
The characteristics of deformation, deformation rear surface equivalent strain is high, and center equivalent strain is low, causes material property uneven.Therefore, in high pressure
It turns round on the basis of squeezing, develops one kind by mould structure and drive workpiece relative rotation, the higher new technology of center equivalent strain, for
The efficiency and workpiece performance uniformity for improving the crowded technology of high pressure torsion are of great significance.
Summary of the invention
For the deficiency of existing background technique, the object of the present invention is to provide a kind of just squeeze, and rotary side to be combined to extrude for ultra-fine
The apparatus and method of crystal bar material.The present invention is combined using forward extrusion with lateral compression, and in upper extrusion cylinder, forward extrusion area is used
Nonaxisymmetric structure, cross section, to ellipse, are then transitioned into circle by rounded transitional again, non-when extrusion cylinder rotates instantly
Axially symmetric structure forward extrusion area will hinder material to rotate, and overcome conventional high-pressure and turn round what material when squeezing was slided relative to upper extrusion cylinder
Problem；Lower extrusion cylinder uses lateral compression mould structure, and the axial symmetry channel for making conventional high-pressure torsion force down extrusion cylinder becomes non-axis
Symmetric channel can drive bar to generate along upper extrusion cylinder and lower extrusion cylinder combined area shear-deformable.Upper extrusion cylinder is supported in pressure
On power machine worktable, bear to act on the axial force on extrusion cylinder when squeezing, lower extrusion cylinder uses bearing support, passes through worm screw
Cooperate with the worm gear arrangement of lower extrusion cylinder circumferential direction, drives lower extrusion cylinder rotation.Compared with traditional high pressure turns round extrusion method, shearing becomes
The driving force of shape becomes mould structure from original frictional force and combines driving with frictional force, greatly improves shear-deformable effect,
It just squeezes and squeezes the strain that deformation significantly improves bar center portion in conjunction with side, improve material structure performance uniformity, promote high pressure torsion
Change the industrial applications of shape.
To achieve the above object, the technical solution adopted by the present invention is as follows:
It is a kind of just to squeeze the device that standby ultra fine grained steel bar is extruded in conjunction with rotary side, including extruding punch, upper extrusion cylinder, bearing, lower squeeze
Pressure cylinder, the support of upper extrusion cylinder, worm screw, bearing and support base；Upper extrusion cylinder center offers a forward extrusion channel, and channel upper end is
Straight wall is cylindric, the crush zone that is positive being connected with straight wall cylinder-like part, and squeezing passage lower end is a circular groove, upper extrusion cylinder
It is fixed in extrusion cylinder support；Bar is cylinder, is placed in extrusion cylinder squeezing passage；Extruding punch, which is placed in, squeezes
In pressure cylinder squeezing passage, it is placed in the upper end of bar；Lower extrusion cylinder upper end has cylinder boss structure, and center offers vertical logical
Road and lateral extrusion channel, lower end have cylinder boss structure, lower extrusion cylinder upper end boss structure and upper extrusion cylinder lower end circle
Bearing is housed, the positioning in realizations between extrusion cylinder and lower extrusion cylinder, lower extrusion cylinder lower end periphery has convex between connected in star
Platform, outside the boss face are machined with worm-gear toothing, and worm-gear toothing and worm screw cooperate, and worm screw connect with deceleration mechanism；The processing of support base upper end
There is step groove, bearing is installed between the cylinder boss of lower extrusion cylinder lower end, determines between extrusion cylinder and support base under realizing
Position, support base lower end is fixed on equipment workbench.
Further improvement of the present invention, upper extrusion cylinder forward extrusion area are nonaxisymmetric structure, and upper end is circle, and lower end is also
Circle, centre is using oval transition, to increase the resistance of bar rotation.
Further improvement of the present invention, lower extrusion cylinder lateral extrusion channel is equal or smaller with Vertical Channel sectional dimension,
Channel angle Ф takes 90 ° -150 °, and outside uses round-corner transition in the angle of channel, and lower extrusion cylinder rotation passes through worm drive.
Invention further discloses a kind of methods just squeezed and extruding standby ultra fine grained steel bar in conjunction with rotary side, are just squeezed using above-mentioned
Device is squeezed in conjunction with rotary side, comprising the following steps:
Step is 1.: pre-processing to bar；
Step is 2.: support base being fixed on equipment workbench, by bearing in the groove of support base, by lower extrusion cylinder lower end
Cylinder boss is in bearing, by bearing on the cylinder boss of lower extrusion cylinder upper end, by bearing mounted in upper extrusion cylinder lower end
In groove, upper extrusion cylinder is fixed in upper extrusion cylinder support, worm screw and lower extrusion cylinder worm-gear toothing are cooperated；
Step is 3.: bar being put into upper extrusion cylinder squeezing passage, extruding punch downlink, extruded bar stock to its front end enters lateral
Channel certain length is squeezed out, then extrusion cylinder rotates under worm drive, and bar sequence is made to generate forward extrusion deformation, rotational shear change
Shape, corner extrusion is shear-deformable, until extruding punch reaches specified pressure distance；
Step is 4.: extruding punch backhaul, is packed into next bar, repeats step 3., and repetition extruding can be realized.
In the above-mentioned methods, the pressing speed of extruding punch is 0.05mm/s-5mm/s；The revolving speed of lower extrusion cylinder be 1 circle/
- 20 circles/minute minute.
Beneficial effects of the present invention: compared with prior art, the present invention have it is following the utility model has the advantages that
1. the upper extrusion cylinder forward extrusion deformed area of the present invention uses side using the nonaxisymmetric structure of oval transition, lower extrusion cylinder
To extruding nonaxisymmetric structure, when lower extrusion cylinder rotates, the asymmetrical molds structure and friction of upper extrusion cylinder and lower extrusion cylinder
Power applies torque to bar, and driving bar is shear-deformable in upper extrusion cylinder and the generation of lower extrusion cylinder combined area, overcomes traditional height
Pressure turns round serious problem of skidding when only relying upon the torsion of friction-driven bar when squeezing, and improves shear-deformable effect.
2. bar is first after forward extrusion deforms, then generates around the shear-deformable of bar circumferential direction, finally pass through lateral compression
Channel turning when, generate in a certain angle shear-deformable of bar axis, deformation pattern multiplicity and loading direction is different, singly
Passage deformation extent is big, can promote material structure thinning process, improves structure refinement efficiency.
3. crowded different from conventional high-pressure torsion, forward extrusion and lateral compression can be such that bar central area generates centainly
The mechanical property of bar central area can be improved in the plastic deformation of degree, reduces its tissue and performance inhomogeneities.
4. the device can be equipped with heating device, lateral compression provides back pressure for torsional deflection area, and torsional deflection is made to be
It is carried out under axial compression stress state, improves the plastic deformation ability of material, therefore, suitable material range of the present invention is wide, easily
In industrialization.
Detailed description of the invention
Fig. 1 is just to squeeze that rotary side is combined to squeeze device half-section diagram in the present invention.
Fig. 2 is upper extrusion cylinder structural schematic diagram in Fig. 1.
Fig. 3 is lower extrusion cylinder structural schematic diagram in Fig. 1.
In figure, 1- extruding punch, 2- bar, the upper extrusion cylinder of 3-, 4- bearing, extrusion cylinder under 5-, the upper extrusion cylinder support of 6-, 7-
Worm screw, 8- bearing, 9- support base, the channel 3-1- upper end, 3-2- forward extrusion area, 3-3- circular groove, 5-1- boss structure, 5-2-
Vertical Channel, 5-3- lateral extrusion channel, 5-4- boss structure, 5-5- worm-gear toothing.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and is further retouched in detail
It states, the embodiment is only for explaining the present invention, does not constitute and limits to protection scope of the present invention.
Embodiment: as shown in Figure 1 to Figure 3: it is a kind of just to squeeze the device that standby ultra fine grained steel bar is extruded in conjunction with rotary side, including squeeze
Belling mould (1), upper extrusion cylinder (3), bearing (4), lower extrusion cylinder (5), upper extrusion cylinder support (6), worm screw (7), bearing (8) and branch
It supports seat (9), upper extrusion cylinder (3) center offers a forward extrusion channel, and channel upper end (3-1) is that straight wall is cylindric, and (3-2) is positive
Crush zone, squeezing passage lower end are a circular groove (3-3), and upper extrusion cylinder (3) is fixed in extrusion cylinder support (6)；Bar
(2) it is cylinder, is placed in extrusion cylinder (3) squeezing passage (3-1)；Extruding punch (1) is placed in squeezing for extrusion cylinder (3)
In pressure passageway (3-1), it is placed in the upper end of bar (2)；Lower extrusion cylinder (5) upper end has cylinder boss structure (5-1), and center is opened
Equipped with Vertical Channel (5-2) and lateral extrusion channel (5-3), lower end has cylinder boss structure (5-4), lower extrusion cylinder (5)
Bearing is housed between upper end boss structure (5-1) and upper extrusion cylinder (3) lower end circular groove (3-3), in realization extrusion cylinder (3) and
Positioning between lower extrusion cylinder (5), lower extrusion cylinder lower end periphery have boss, and outside the boss face is machined with worm-gear toothing (5-5),
Worm-gear toothing (5-5) and worm screw (7) cooperate, and worm screw (7) connect with deceleration mechanism；Support base (9) upper end is machined with step groove, with
Bearing is installed, under realizing between extrusion cylinder (5) and support base (9) between lower extrusion cylinder lower end cylinder boss structure (5-4)
Positioning, support base (9) lower end is fixed on equipment workbench.
In the present embodiment, upper extrusion cylinder (3) forward extrusion area (3-2) is nonaxisymmetric structure, and upper end is circle, lower end
It is circle, centre is using oval transition, to increase the resistance of bar rotation；Lower extrusion cylinder (5) lateral extrusion channel (5-3) with
Vertical Channel (5-2) sectional dimension is equal or smaller, and channel angle Ф takes 90 ° -150 °, and outside uses fillet mistake in the angle of channel
It crosses, lower extrusion cylinder (5) rotation is driven by worm screw (7).
The method for preparing ultra fine grained steel bar using the present embodiment, comprising the following steps:
Step is 1.: pre-processing to bar (2)；
Step is 2.: support base (9) is fixed on equipment workbench, by bearing (8) in the groove of support base (9), will under
Extrusion cylinder (5) lower end cylinder boss (5-4) is mounted in lower extrusion cylinder (5) upper end cylinder boss in bearing (8), by bearing (4)
On (5-1), by bearing (4) in the groove (3-3) of upper extrusion cylinder (3) lower end, upper extrusion cylinder (3) is fixed on upper extrusion cylinder
It supports on (6), the worm-gear toothing (5-5) of worm screw (7) and lower extrusion cylinder (5) is cooperated；
Step is 3.: bar (2) being put into upper extrusion cylinder (3) squeezing passage (3-1), extruding punch (1) downlink, extruded bar stock
(2) enter lateral extrusion channel (5-3) certain length to its front end, then worm screw (7) drives lower extrusion cylinder (5) rotation, makes stick
Material sequence generates forward extrusion deformation, rotational shear deformation, and corner extrusion is shear-deformable, until extruding punch (1) reaches specified pressure
Lower distance.
Step is 4.: extruding punch (1) backhaul is packed into next bar (2), repeats step 3., and repetition extruding can be realized.
In the above-mentioned methods, the pressing speed of extruding punch (1) is 0.05mm/s-5mm/s；The revolving speed of lower extrusion cylinder (5)
For 1 circle/- 20 circles of minute/minute.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (6)
1. a kind of just squeeze the device for extruding standby ultra fine grained steel bar in conjunction with rotary side, which is characterized in that including extruding punch (1), on
Extrusion cylinder (3), bearing (4), lower extrusion cylinder (5), upper extrusion cylinder support (6), worm screw (7), bearing (8) and support base (9)；It is described
Upper extrusion cylinder (3) center offers a forward extrusion channel, and channel upper end (3-1) is that straight wall is cylindric, forward extrusion area (3-2) and straight
Wall cylindrical portion is connected, and squeezing passage lower end is a circular groove (3-3), and upper extrusion cylinder (3) is fixed on extrusion cylinder support
(6) on；The bar (2) is cylinder, is placed in extrusion cylinder (3) squeezing passage (3-1)；The extruding punch (1) is put
It is placed in the squeezing passage (3-1) of extrusion cylinder (3), is placed in the upper end of bar (2)；Lower extrusion cylinder (5) upper end has
Cylinder boss structure (5-1), center offer Vertical Channel (5-2) and lateral extrusion channel (5-3), and lower end is convex with cylinder
Platform structure (5-4) fills between lower extrusion cylinder (5) upper end boss structure (5-1) and upper extrusion cylinder (3) lower end circular groove (3-3)
There is bearing, the positioning in realization between extrusion cylinder (3) and lower extrusion cylinder (5), lower extrusion cylinder lower end periphery has boss, boss
Lateral surface is machined with worm-gear toothing (5-5), and worm-gear toothing (5-5) and worm screw (7) cooperate, and worm screw (7) connect with deceleration mechanism；The branch
Support seat (9) upper end is machined with step groove, is equipped with bearing between lower extrusion cylinder lower end cylinder boss structure (5-4), realizes
Positioning between lower extrusion cylinder (5) and support base (9), support base (9) lower end are fixed on equipment workbench.
2. a kind of just crowded device for extruding standby ultra fine grained steel bar in conjunction with rotary side according to claim 1, which is characterized in that
Upper extrusion cylinder (3) the forward extrusion area (3-2) is a non-axis symmetry mechanism, and the upper end is circle, and lower end is also circle, and centre is adopted
With oval transition, to increase the resistance of bar rotation.
3. a kind of just crowded device for extruding standby ultra fine grained steel bar in conjunction with rotary side according to claim 1, which is characterized in that
Lower extrusion cylinder (5) the lateral extrusion channel (5-3) is equal or smaller with Vertical Channel (5-2) sectional dimension, channel angle Ф
90 ° -150 ° are taken, outside uses round-corner transition in the angle of channel, and lower extrusion cylinder (5) rotation is driven by worm screw (7).
4. a kind of just squeezing the method for extruding standby ultra fine grained steel bar in conjunction with rotary side, which is characterized in that appointed using such as claim 1-3
Just squeezing described in one combines rotary side to squeeze device, comprising the following steps:
Step is 1.: pre-processing to bar (2)；
Step is 2.: support base (9) is fixed on equipment workbench, by bearing (8) in the groove of support base (9), will under
Extrusion cylinder (5) lower end cylinder boss (5-4) is mounted in lower extrusion cylinder (5) upper end cylinder boss in bearing (8), by bearing (4)
On (5-1), by bearing (4) in the groove (3-3) of upper extrusion cylinder (3) lower end, upper extrusion cylinder (3) is fixed on upper extrusion cylinder
It supports on (6), worm-gear toothing (5-5) on the outside of worm screw (7) and lower extrusion cylinder (5) is cooperated；
Step is 3.: bar (2) being put into upper extrusion cylinder (3) squeezing passage (3-1), extruding punch (1) downlink, extruded bar stock
(2) enter lateral extrusion channel (5-3) certain length to its front end, then worm screw (7) drives lower extrusion cylinder (5) rotation, makes stick
Material sequence generates forward extrusion deformation, rotational shear deformation, and corner extrusion is shear-deformable, until extruding punch (1) reaches specified pressure
Lower distance；
Step is 4.: extruding punch (1) backhaul is packed into next bar (2), repeats step 3., and repetition extruding can be realized.
5. according to claim 4 just squeezing the method for extruding standby ultra fine grained steel bar in conjunction with rotary side, which is characterized in that described
The pressing speed of extruding punch (1) is 0.05mm/s-5mm/s.
6. according to claim 4 just squeezing the method for extruding standby ultra fine grained steel bar in conjunction with rotary side, which is characterized in that described
The revolving speed of lower extrusion cylinder (5) is 1 circle/- 20 circles of minute/minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354360.6A CN109365556A (en) | 2018-11-14 | 2018-11-14 | It is a kind of just to squeeze the apparatus and method that standby ultra fine grained steel bar is extruded in conjunction with rotary side |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354360.6A CN109365556A (en) | 2018-11-14 | 2018-11-14 | It is a kind of just to squeeze the apparatus and method that standby ultra fine grained steel bar is extruded in conjunction with rotary side |
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| Publication Number | Publication Date |
|---|---|
| CN109365556A true CN109365556A (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811354360.6A Pending CN109365556A (en) | 2018-11-14 | 2018-11-14 | It is a kind of just to squeeze the apparatus and method that standby ultra fine grained steel bar is extruded in conjunction with rotary side |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770192A (en) * | 2020-06-09 | 2021-12-10 | 无锡市源昌机械制造有限公司 | High-precision metal section bending forming extrusion die |
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| CN2455398Y (en) * | 2000-12-08 | 2001-10-24 | 天津理工学院 | Rotary extruder with equal channel angle |
| JP2005000990A (en) * | 2003-05-16 | 2005-01-06 | Susumu Mizunuma | Twist-extrusion working method for material |
| CN1712155A (en) * | 2005-07-27 | 2005-12-28 | 哈尔滨工业大学 | Equal radial-channel angular extruding machining apparatus of magnesium alloy and machining method thereof |
| CN106140852A (en) * | 2016-06-29 | 2016-11-23 | 重庆理工大学 | A kind of high-strength tenacity carefully brilliant light-alloy tubing prepare mould and preparation method thereof |
| CN108097733A (en) * | 2018-01-22 | 2018-06-01 | 中国科学院金属研究所 | A kind of crowded torsion Compound Machining mold and method that multi-direction shearing can be achieved |
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2018
- 2018-11-14 CN CN201811354360.6A patent/CN109365556A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2455398Y (en) * | 2000-12-08 | 2001-10-24 | 天津理工学院 | Rotary extruder with equal channel angle |
| JP2005000990A (en) * | 2003-05-16 | 2005-01-06 | Susumu Mizunuma | Twist-extrusion working method for material |
| CN1712155A (en) * | 2005-07-27 | 2005-12-28 | 哈尔滨工业大学 | Equal radial-channel angular extruding machining apparatus of magnesium alloy and machining method thereof |
| CN106140852A (en) * | 2016-06-29 | 2016-11-23 | 重庆理工大学 | A kind of high-strength tenacity carefully brilliant light-alloy tubing prepare mould and preparation method thereof |
| CN108097733A (en) * | 2018-01-22 | 2018-06-01 | 中国科学院金属研究所 | A kind of crowded torsion Compound Machining mold and method that multi-direction shearing can be achieved |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113770192A (en) * | 2020-06-09 | 2021-12-10 | 无锡市源昌机械制造有限公司 | High-precision metal section bending forming extrusion die |
| CN113770192B (en) * | 2020-06-09 | 2024-01-16 | 无锡市源昌机械制造有限公司 | High-precision metal section bending forming extrusion die |
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Application publication date: 20190222 |