CN202498093U - Mould for extrusion forming of tubes - Google Patents
Mould for extrusion forming of tubes Download PDFInfo
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- CN202498093U CN202498093U CN2012201087920U CN201220108792U CN202498093U CN 202498093 U CN202498093 U CN 202498093U CN 2012201087920 U CN2012201087920 U CN 2012201087920U CN 201220108792 U CN201220108792 U CN 201220108792U CN 202498093 U CN202498093 U CN 202498093U
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Abstract
The utility model discloses a mould for the extrusion forming of tubes, which is characterized in that: the end face of one end of a convex die is connected with an end face of a container liner through a connecting pin; the end face of the other end of the convex die is connected with an end face of a concave die; and in the process of connecting, the outlet of each metal flow channel in the container liner is butt-jointed with the inlet of each metal flow channel on the end face of the matching end of the convex die; and a fixed-diameter bar located in the centers of the convex die and the end face of the matching end of the concave die is embedded in a welded cavity in the center of the concave die, and the thickness of a gap between the fixed-diameter bar and the concave die is same as the thickness of a formed tube. According to the utility model, through changing a shunt mould into a method of jointly feeding multiple blanks into the welded cavity, the blanks are mutually independent, and generate equal channel corner deformation before alloys are fed into the welded cavity, and then, the welded extrusion is realized after the alloys are fed into the welded cavity, thereby effectively avoiding an alloy shunting process; and because the extrusion force is concentrated in an equal channel corner grain refinement and welding process, the welding quality is better, and product grains are fine, thereby obtaining better extrusion products.
Description
Technical field
The present invention relates to the hot-working field, specifically is a kind of shaping dies that obtains thin grained magnesium alloy tubing through multi-blank equal channel angular seam extrusion molding.
Technical background
Alloy in lightweight tubing such as thin grained magnesium alloy, aluminium alloy have light weight, specific strength and specific stiffness advantages of higher.In fields such as Aeronautics and Astronautics, bicycle, portable signal towers very big attraction is arranged.But the technology of such alloy in lightweight tubing of traditional fabrication adopts shunting extruding mostly, and the extruding force of shunting extruding needs is big, and the Chang Yin extrusion process parameters that is difficult to accurately to control it makes phenomenons such as tubing generation mould cracking.All all to consume very big extruding force relevant with shunting process and seam process for this.And the alloy pipe of tradition shunting pressing method extruding be often owing to need be heated to very high temperature with alloy and just can extrude in order to reduce extruding force, therefore cause the crystal grain of extruding pipe material thick, mechanical performance is relatively poor, surface oxidation is serious, the tubing precision difficulty reach instructions for use.
Equal Channel Angular Pressing; Also cry the equal channel angular extruding, be called for short ECAE or ECAP, this technology is a kind of advanced technology that obtains super fine crystal material; The passage that high-tech equates through two axis and sectional dimension; Processed blank is extruded, made metal material that very big shear strain take place in extrusion process through the corner effect and realize that crystal grain thinning improves the purpose of performance, this technology often is raised in document; But not having document or invention that this technology is used in the actual product, generally all is to be used for all kinds of pieces of bar stock are carried out crystal grain thinning.The method that in document " Finite element analysis of plastic deformation of CP-Ti by multi-pass equal channel angular extrusion at medium hot-working temperature ", combines through finite element modelling and test like author Z.J.Zhang and I.H.Son etc. has been described the mechanism that should technology produces fining metal crystal grain and technology etc.Author M.W.Fu a and Y.W.Tham are describing grain refinement situation and the performance raising situation of 6061 aluminium alloys after being out of shape through ECAE in the document " The grain refinement of Al-6061 via ECAE processing:Deformation behavior, microstructure and property " for another example.
The device of the ultra-fine brilliant tubing of a kind of equal channel angular extruding preparation, publication number is disclosed in being the innovation and creation of CN2690068.The equal channel angular extrusion process that this invention utilizes the hollow extrusion depression bar that tubing is implemented multi-pass comes refinement tubing crystal grain.Advantage is that size of pipe and tubing is constant in whole process, and the equal channel angular distortion all takes place under the effect of mould each several part.Shortcoming is that the requirement blank must be the tubing that processes, and this invention can only be carried out crystal grain thinning to existing tubing and improve performance, rather than makes tubing.
A kind of ultra-fine brilliant niti-shaped memorial alloy tube preparation method based on Equal Channel Angular Pressing is disclosed in publication number is the innovation and creation of CN102189143A.This invention the inside of the niti-shaped memorial alloy pipe that will be shaped fill in metal-cored; Then the niti-shaped memorial alloy pipe is enclosed in the metallic sheath; In the ECAE frock of forming by punch and die, to metallic sheath, niti-shaped memorial alloy pipe with metal-coredly push, produce the shearing plastic deformation simultaneously, realize the grain refinement of niti-shaped memorial alloy pipe.The shortcoming of this invention is that deformation process has auxiliary material (like sleeve and mandrel) to participate in distortion; Sleeve after will being out of shape with product after the extruding is peeled off; Mandrel after will being out of shape with product takes out; Not only increased the following process operation of product, also participated in the consumption that distortion increases the energy because of auxiliary material.
In view of this; It is a kind of through improving recipient and mould that the present invention provides; The brilliant thin wall alloy tubing of seam extrusion molding production high accuracy high-intensity fine behind the realization multi-blank equal channel angular crystal grain thinning; Not only avoid the extruding force of shunting process to dissipate, and utilized equal channel angular to reach the effect that better crystal grain thinning improves performance.
Summary of the invention
For overcoming the deficiency that has increased following process operation and energy consumption in the forming process that exists in the prior art, the present invention proposes a kind of mould that is used for the tubing extrusion molding.
The present invention includes recipient liner, punch and die; The end face of punch one end is connected with an end face of recipient liner through connecting pin; The end face of the punch other end is connected with an end face of die; In the connection, the outlet of four strip metal flow channels in the recipient liner is all docked with the inlet of four metal flow passages that are positioned at punch abutting end end face; The fixed diameter rod that is positioned at punch and die abutting end end face center embeds the seam chamber at die center, and gapped between the metering hole inner surface on fixed diameter rod and the die; The size in said gap is identical with the wall thickness of formed thereby tubing.
Being evenly equipped with 4～6 in the recipient liner extends and connects the axial metal flow passage of this recipient liner along recipient liner axial direction; The center line of said each metal flow passage is all parallel with the center line of recipient liner, and the center line equidistance of the center line in each blank hole and recipient liner.
Described fixed diameter rod is positioned on the punch end face center that cooperates an end with die; There is the radially boss of protrusion this fixed diameter rod end, and the diameter of this boss equals the internal diameter of tubing to be formed; On punch, be evenly equipped with 4 and connect the axial metal flow passages of this punch, the center line of each metal flow passage all and 15～50 ° angle is arranged, the corner of formation metal flow passage on the mating surface of recipient liner and punch between the center line of punch; The metal flow passage of said punch cooperates the outlet on the end end face at this punch with die, tangent with the root of the fixed diameter rod that is positioned at punch 4 these end faces.
Said die cooperates the endoporus of an end with punch be isometrical hole, and this die other end is a shaped hole, and this shaped hole go out the go into die orifice of die orifice greater than this shaped hole; Die cooperates an end end face center that the seam chamber is arranged with punch, the aperture in this seam chamber is slightly larger than the distance of each the metal flow passage outer rim on the punch end face; Between the reducing hole of the seam chamber of die and die, metering hole is arranged; The internal diameter of this metering hole is 15～100mm.
Die cooperates aperture, an end end than the big 3mm of each metal flow passage outer rim on the punch end face with punch 4.
The present invention changes the method that multi-blank enters the seam chamber altogether into through shunting mould; Independent mutually between each blank; Replaced several strands of metal flows after the shunting of conventional extruded method, and the equal channel angular distortion had taken place before alloy gets into the seam chamber, realized that after getting into the seam chamber seam extrudes.Not only effectively avoided alloy is shunted process, and the extruding force that provides of extruder almost all concentrates on the equal channel angular crystal grain thinning and the seam process makes welding quality better, product grains is tiny, thereby obtains better extruded product.Among the present invention, between the center line of the metal flow passage on the punch and the mold center's line angle is arranged, make metal in flowing through recipient liner and the distortion of punch generation equal channel angular, pure shear that promptly can crystal grain thinning is out of shape.Through being positioned at punch one end end face center the fixed diameter rod of axial protrusion is arranged, confirm the internal diameter of extruded product tubing.Seam chamber on the die 7 adopts circular arc to seamlessly transit everywhere, avoids producing the dead band in the metal flow deformation process.
In the use; Metal stock in the recipient liner flows to punch under the promotion of dummy block, and the equal channel angular plastic deformation takes place equal channel angular everywhere in the boundary of punch and die; In the punch upper channel, flow to the seam cavity region, confirm that through the fixed diameter rod place tubing cross sectional shape extrudes.The process that grain refinement takes place in this process has three plastic deformation stages, and first stage is that the channel corner process makes metal in flow process, produce bigger shearing plastic deformation, therefore can crystal grain thinning.Second stage is the plastic deformation of metal in the seam process, the filling process atom slippage under the high pressure and twin can crystal grain thinning.Three phases is that the simple crimp that the extruding cross section diminishes has taken place when metal is extruded the work zone, can crystal grain thinning, and the big more thinning effect of extrusion ratio is good more.As utilize the AZ31 magnesium alloy pipe of diameter for 4 gangs of blank extruding diameter 104mm thickness 3mm of 34mm, more than the original blank crystallite dimension 100 μ m, finally obtain average grain size and reach below the 8 μ m.
The present invention compares with the single blank shunting of tradition extruding seam pipe craft; The extruding force of using multi-blank can avoid single blank to bring in the process that is split into the multiply metal flow increases; Therefore mould of the present invention can reduce extruding force; As utilizing the AZ31 magnesium alloy pipe of diameter for 4 gangs of blank extruding diameter 104mm thickness 3mm of 34mm, the extruding force peak value is 210 tons.630 tons of laborsaving reaching more than 50% than traditional technology.And the present invention adopts split type combination die, and is simple, convenient.
Description of drawings
Accompanying drawing 2 is recipient liners; Wherein: Fig. 2 a is a right view; Fig. 2 b is main cutaway view; Fig. 2 c is the B-B cutaway view;
Accompanying drawing 5 is metal flow process sketch mapes in mould.Wherein:
1. blank hole 2. locating slots 3. recipient liners 4. punch 5. lift by crane screws 6. connecting pins
7. die 8. alignment pins 9. connecting holes 10. dowel holes 11. bolts
12. connecting pin 13. seam chambeies 14 connecting holes, 15. lifting screws, 16. fixed diameter rods
17. bolt hole 18. dummy blocks 19 blanks 20. equal channel angular places 21. passages, 22. metering holes
The specific embodiment
Present embodiment is the mould of the thin peritectic alloy tubing of a kind of multi-blank equal channel angular seam extrusion molding, is used for the thin grained magnesium alloy tubing of extrusion molding.The diameter of institute's extrude tubes product is a 104mm thickness 3mm pipe.The extruder tonnage that forming process adopts is 2500t.Adopt the H13 hot die steel to make mould and all the other compression tools.
Present embodiment comprises recipient liner 3, punch 4 and die 7.The end face of punch 4 one ends is connected with an end face of recipient liner 3 through connecting pin 12; The end face of punch 4 other ends is connected with an end face of die 7 with connecting pin 6 through interior hexagonal fastening bolt 11.In the connection, the outlet of four strip metal flow channels in the recipient liner 3 is all docked with the inlet of four metal flow passages that are positioned at punch 4 abutting end end faces; The fixed diameter rod that is positioned at punch 4 and die 7 abutting end end face centers embeds the seam chamber 13 at die 7 centers.
Shown in accompanying drawing 2, recipient liner 3 is a cylinder.The external diameter of recipient liner 3 cooperates with the internal diameter of recipient.Be evenly equipped with 4 in the recipient liner 3 and extend and connect this recipient liner 3 axial straight holes along recipient liner 3 axial directions, this straight hole is the metal flow passage.The aperture of said metal flow passage is confirmed according to the external diameter of intending the blank that is shaped.The center line of said each metal flow passage is all parallel with the center line of recipient liner 3, and the center line equidistance of the center line in each blank hole and recipient liner 3.The annular positioning groove 2 that at recipient liner 3 external peripheral surfaces middle parts a cross section to be arranged be rectangle is when recipient liner 3 cooperates with recipient, through the axial location that cooperate realization recipient liner 3 of this locating slot 2 with recipient internal circular surfaces snap ring.Recipient liner 3 cooperate with punch 4 end face on be symmetrically distributed with 2 connecting holes, be used for recipient liner 3 and punch 4 are connected.
Shown in accompanying drawing 3, cooperate the end face center of an end that the columniform fixed diameter rod 16 of axial protrusion is arranged on the punch 4 with die 7.There is radially the boss of protrusion these fixed diameter rod 16 ends, and the diameter of this boss equals the internal diameter of tubing to be formed, and the longitudinal section of this fixed diameter rod is " T " shape is beneficial to metal forming.In the present embodiment, the diameter of fixed diameter rod end is than other the big 8mm of diameter of part of fixed diameter rod, and the axial length of this fixed diameter rod end is 8mm.The axial length of calibrating strap is 15～100mm, and in the present embodiment, the length of said fixed diameter rod is 20mm.When punch 4 cooperated with die 7, the end that is positioned at the fixed diameter rod 16 of punch 4 end faces embedded the metering hole of die, and and die 7 on the metering hole inner surface between gapped; The size in said gap is identical with the wall thickness of formed thereby tubing.
On punch 4, be evenly equipped with 4 through holes that connect the axial metal flow passage of this punch 4; Said the metal flow passage on the punch 4 the distance L between this punch 4 and recipient liner 3 abutting end end face apertures and the mold center's line greater than between this punch 4 and die 7 abutting end end face apertures and the mold center's line apart from l; The center line that makes each metal flow passage all and 15～50 ° angle arranged between the center line of punch 4; On the mating surface of recipient liner 3 and punch 4, form the corner of metal flow passage; Make like this metal in flowing through recipient liner and the distortion of punch generation equal channel angular, pure shear that promptly can crystal grain thinning is out of shape; In the present embodiment, the angle between the center line of the center line of each through hole and punch 4 is 17 °.The metal flow passage of said punch 4 cooperates the outlet on the end end face at this punch 4 with die, tangent with the root of the fixed diameter rod 16 that is positioned at punch 4 these end faces.
On 2 end end faces of punch 4, respectively be evenly equipped with 2 pin-and-holes and be respectively applied for this punch 4 and recipient liner 3 and die 7 axial location and be connected.The outer surface of punch 4 has a lifting screwed hole 5.On the end face of punch 4 and die 7 abutting ends, two tapped blind holes are arranged, be used for punch and die are fastenedly connected.
As shown in Figure 4; Said die 7 is the hollow revolving body, and its endoporus is stepped, and this die 7 cooperate the endoporus of an end with punch 4 be isometrical hole; These die 7 other ends are the shaped hole of reducing; This end at die 7 has formed horn mouth, and what make shaped hole goes out the go into die orifice of die orifice greater than this shaped hole, to reduce tubing and the friction of shaped hole hole wall after being shaped.In the present embodiment, the angle between the hole wall of shaped hole and the mold center's line is 13 °.Cooperate the end face outer rim place of an end that annular boss is arranged with punch 4 at said die 7, be used for the radial location of punch 4.The internal diameter of this annular boss is identical with the external diameter of the annular assembling step of punch 4 abutting end end faces.Die 7 cooperates an end end face center that seam chamber 13 is arranged with punch 4, the aperture in this seam chamber 13 is slightly larger than the distance of each the metal flow passage outer rim on punch 4 end faces, is beneficial to metal and fills type and flow.In the present embodiment, said die 7 cooperates aperture, an end end than the big 3mm of each metal flow passage outer rim on punch 4 end faces with punch 4.
Between the reducing hole of the seam chamber 13 of die 7 and die 7, isometrical metering hole 22 is arranged.The internal diameter of this metering hole 22 is identical with the external diameter of formed thereby tubing.The axial length of metering hole 22 is confirmed according to the specification of formed thereby tubing, is 15～100mm; In the present embodiment, the axial length of fixed diameter rod end is identical on the axial length of this metering hole 22 and the punch 4, also is 8mm.Outer surface at die 7 has lifting screw 15 and dowel hole 10.
The right angle of 13 bottoms, seam chamber adopts the circular arc of R=10mm to seamlessly transit, to avoid producing the dead band in the metal flow deformation process.
On die 7 and end face that punch 4 cooperates, 2 dowel holes are arranged, the position of the pin-and-hole on the position of this locating hole and punch 4 counterfaces is corresponding, through pin to prevent dislocation between die 7 and the punch 4.End face at die 7 has two bolt holes 17, is used for through bolt die 7 being connected in punch 4.
During assembling, recipient liner 3 adopts connecting pin 12 and locating hole 9 to cooperate axial location with punch 4, utilizes locating slot 2 to be used for fixing recipient liner 3 along axial location.Punch 4 adopts alignment pin 6 and hexagon socket head cap screw to fix with die 7; Lifting screw 5 is used for assembling and installation mold on extruder; Alignment pin 8 and locating hole 10 cooperate when making on extruder installation mold makes the mould circumferential registration, and alignment pin 8 is Φ 16 * 40mm.Locating slot 2 is used for confirming recipient liner axial location, should cooperates axial location with recipient.The assembling back is 1 inwall and mould inner wall brush graphite water lubrication in the blank hole.
Claims (5)
1. a mould that is used for the tubing extrusion molding is characterized in that, comprises recipient liner, punch and die; The end face of punch one end is connected with an end face of recipient liner through connecting pin; The end face of the punch other end is connected with an end face of die; In the connection, the outlet of four strip metal flow channels in the recipient liner is all docked with the inlet of four metal flow passages that are positioned at punch abutting end end face; The fixed diameter rod that is positioned at punch and die abutting end end face center embeds the seam chamber at die center, and gapped between the metering hole inner surface on fixed diameter rod and the die; The size in said gap is identical with the wall thickness of formed thereby tubing.
2. a kind of according to claim 1 mould that is used for the tubing extrusion molding is characterized in that, is evenly equipped with 4 in the recipient liner and extends and connect the axial metal flow passage of this recipient liner along recipient liner axial direction; The center line of said each metal flow passage is all parallel with the center line of recipient liner, and the center line equidistance of the center line in each blank hole and recipient liner.
3. a kind of according to claim 1 mould that is used for the tubing extrusion molding is characterized in that, described fixed diameter rod is positioned on the punch end face center that cooperates an end with die; There is the radially boss of protrusion this fixed diameter rod end, and the diameter of this boss equals the internal diameter of tubing to be formed; On punch, be evenly equipped with 4 and connect the axial metal flow passages of this punch, the center line of each metal flow passage all and 15～50 ° angle is arranged, the corner of formation metal flow passage on the mating surface of recipient liner and punch between the center line of punch; The metal flow passage of said punch cooperates the outlet on the end end face at this punch with die, tangent with the root of the fixed diameter rod that is positioned at punch 4 these end faces.
4. a kind of according to claim 1 mould that is used for the tubing extrusion molding is characterized in that, said die cooperates the endoporus of an end with punch be isometrical hole, and this die other end is a shaped hole, and this shaped hole go out the go into die orifice of die orifice greater than this shaped hole; Die cooperates an end end face center that the seam chamber is arranged with punch, the aperture in this seam chamber is slightly larger than the distance of each the metal flow passage outer rim on the punch end face; Between the reducing hole of the seam chamber of die and die, metering hole is arranged; The internal diameter of this metering hole is 15～100mm.
5. require 1 said a kind of mould that is used for the tubing extrusion molding like profit, it is characterized in that, said die cooperates aperture, an end end than the big 3mm of each metal flow passage outer rim on the punch end face with punch 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201087920U CN202498093U (en) | 2012-03-21 | 2012-03-21 | Mould for extrusion forming of tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201087920U CN202498093U (en) | 2012-03-21 | 2012-03-21 | Mould for extrusion forming of tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202498093U true CN202498093U (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201087920U Withdrawn - After Issue CN202498093U (en) | 2012-03-21 | 2012-03-21 | Mould for extrusion forming of tubes |
Country Status (1)
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| CN (1) | CN202498093U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601147A (en) * | 2012-03-21 | 2012-07-25 | 西北工业大学 | Mould for multi-blank equal-channel angular welding extruded molded pipe |
| CN108425054A (en) * | 2018-04-13 | 2018-08-21 | 东北大学 | The high energy-absorbing magnesium alloy of high-ductility and can depth clod wash tubing preparation facilities and method |
| CN116020894A (en) * | 2023-03-29 | 2023-04-28 | 太原科技大学 | Equal-channel double-corner variable-diameter extrusion forming die and process for annular cylindrical part |
-
2012
- 2012-03-21 CN CN2012201087920U patent/CN202498093U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601147A (en) * | 2012-03-21 | 2012-07-25 | 西北工业大学 | Mould for multi-blank equal-channel angular welding extruded molded pipe |
| CN102601147B (en) * | 2012-03-21 | 2014-04-16 | 西北工业大学 | Mould for multi-blank equal-channel angular welding extruded molded pipe |
| CN108425054A (en) * | 2018-04-13 | 2018-08-21 | 东北大学 | The high energy-absorbing magnesium alloy of high-ductility and can depth clod wash tubing preparation facilities and method |
| CN108425054B (en) * | 2018-04-13 | 2019-10-01 | 东北大学 | The high energy-absorbing magnesium alloy of high-ductility and can depth clod wash tubing preparation facilities and method |
| CN116020894A (en) * | 2023-03-29 | 2023-04-28 | 太原科技大学 | Equal-channel double-corner variable-diameter extrusion forming die and process for annular cylindrical part |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121024 Effective date of abandoning: 20140416 |
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| RGAV | Abandon patent right to avoid regrant |