CN114309112B - Novel Bc constant diameter angle extrusion die - Google Patents
Novel Bc constant diameter angle extrusion die Download PDFInfo
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- CN114309112B CN114309112B CN202111645334.0A CN202111645334A CN114309112B CN 114309112 B CN114309112 B CN 114309112B CN 202111645334 A CN202111645334 A CN 202111645334A CN 114309112 B CN114309112 B CN 114309112B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 161
- 239000000463 material Substances 0.000 claims abstract description 10
- 210000001503 joint Anatomy 0.000 claims description 4
- 230000002349 favourable effect Effects 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000007670 refining Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to a novel Bc constant diameter angle extrusion die, which comprises a die body, wherein a vertical extrusion channel, a transverse extrusion channel and a longitudinal extrusion channel with the same diameter are arranged in the die body, an upper material groove is arranged at the upper end of the vertical extrusion channel, the lower end of the vertical extrusion channel is vertically communicated with one end of the transverse extrusion channel, and the other end of the transverse extrusion channel is vertically communicated with the end part of the longitudinal extrusion channel. The die has the advantages that 2-pass Bc path samples are obtained through 1-time charging through ingenious combination of one vertical channel and two horizontal channels, the samples can realize shearing deformation in three directions, the true strain is about 2.0, the grain refining effect is good, the extrusion efficiency is high, the extrusion process is reliable and is not easy to be unstable, the bolt stress is reasonable, the top end of the extrusion rod can be repeatedly utilized, the assembly and disassembly are reasonable, and the like.
Description
Technical field:
the invention relates to a novel Bc constant diameter angle extrusion die,
the background technology is as follows:
the equal diameter angle extrusion die is a die which can make the metal material produce ideal pure shearing deformation at the corner position of two identical diameter channels which are mutually formed into a certain angle so as to obtain the ultrafine grain material with high strength. Most of the miter extrusion dies in the laboratory are now conventional miter extrusion dies, which typically have A, B two modules that snap together to form a miter extrusion channel. However, most of the dies cannot obtain multiple-pass samples through 1-time charging, and even if multiple-pass samples can be obtained, the defects of large structural size, complex device, poor grain refinement effect and the like of the dies exist. And the traditional die generally performs Bc path extrusion and can repeatedly charge, so that the steps are complicated, the extrusion efficiency is low, and the grain refinement process is slow. For the metal that needs to dismantle the mould repeatedly in the experiment individually, for example when carrying out the constant diameter angle extrusion of pure copper, then because the location is inaccurate, lead to the assembly and disassembly difficulty to and in the experiment because too high extrusion force can lead to the fact the extrusion pole crooked, need often change extrusion pole device, cause the extravagant problem of product. In addition, the problem that the extrusion rod is unstable due to the fact that the extrusion rod stretches into the channel in a small size can occur in the experiment, and in addition, according to the characteristics of pure copper, the die is inconvenient to disassemble and abrasion of the die is accelerated due to the fact that the constraint force is too large at the die outlet. Finally, some die bolts are distributed unreasonably, so that the problems of overlarge bearing of individual bolts, plastic deformation and the like are caused.
Chinese patent number 202021667537.0 discloses an equal channel angular extrusion die which solves the problem that the inflection point of a groove of a traditional die is easy to crack, but each time of charging can only carry out equal channel angular extrusion for 1 time, the extrusion efficiency is low, the grain refinement is slow, superfine crystal tissues cannot be obtained quickly, and the die is complex and difficult to assemble. The Chinese patent number 201621085616.4 discloses a rotary channel equal-diameter angle parallel extrusion die, which realizes that multi-pass extrusion can be carried out by 1-time charging, and the angles of samples and the die between each pass are changed, but Bc path extrusion is not strictly realized (Bc path: after each pass of extrusion, the samples always rotate 90 degrees along the same direction and are put into the die for the next pass), the samples do not realize shearing deformation in three directions, the grain refinement effect is not obvious, and in addition, the die is complex and the disassembly and the assembly are inconvenient.
The invention comprises the following steps:
the invention aims at improving the problems in the prior art, namely the technical problem to be solved by the invention is to provide a novel Bc equal-diameter angle extrusion die which is reasonable in design, and can obtain a 2-pass Bc path sample after 1-time charging, so that the efficiency is improved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a novel Bc constant diameter angle extrusion die, includes the mould body, the inside of mould body is equipped with the vertical extrusion passageway, horizontal extrusion passageway and the vertical extrusion passageway of diameter the same, the upper end of vertical extrusion passageway is equipped with the silo, and the lower extreme of vertical extrusion passageway communicates with the one end of horizontal extrusion passageway is perpendicular, the other end of horizontal extrusion passageway communicates with the tip is perpendicular of vertical extrusion passageway.
Further, the die body comprises a module A and a module B which are buckled relatively, vertical grooves, transverse grooves and longitudinal grooves which are communicated sequentially are formed in the butt joint surfaces of the module A and the module B, a vertical extrusion channel is formed after the vertical grooves of the module A and the vertical grooves of the module B are buckled mutually, a transverse extrusion channel is formed after the transverse grooves of the module A and the transverse grooves of the module B are buckled mutually, and a longitudinal extrusion channel is formed after the longitudinal grooves of the module A and the longitudinal grooves of the module B are buckled mutually.
Further, the top of the module A and the top of the module B are respectively provided with a semicircular groove communicated with the vertical groove, and the semicircular grooves of the module A and the semicircular grooves of the module B are buckled to form a circular feeding groove.
Further, the module A comprises a vertical section A and a horizontal section A which are distributed in an L shape, and the horizontal section A is fixed at the lower end of the left side surface of the vertical section A; the module B comprises a vertical section B and a horizontal section B which are distributed in an L shape, wherein the horizontal section B is fixed at the lower end of the front side surface of the vertical section B, the front side surface of the vertical section A and the rear side surface of the vertical section B are respectively provided with a vertical groove and a transverse groove, and the right side surface of the horizontal section A and the left side surface of the horizontal section B are respectively provided with a longitudinal groove.
Further, the upper end of the vertical section A and the upper end of the vertical section B are respectively provided with a first positioning pin hole, the front end of the horizontal section A and the front end of the horizontal section B are respectively provided with a second positioning pin hole, and positioning pins are respectively arranged in the first positioning pin holes and the second positioning pin holes.
Further, the vertical section A and the vertical section B are fixedly connected through a plurality of pairs of first bolts distributed from top to bottom; the front ends of the horizontal section A and the horizontal section B are fixedly connected through a pair of second bolts.
Further, the device also comprises an extrusion rod which is used for extending into the vertical extrusion channel and extruding the sample, and one end of the extrusion rod is in threaded connection with an extrusion base.
Further, a feeding seat is arranged in the feeding groove, and a vertical through hole which is favorable for extrusion penetration is formed in the middle of the feeding seat.
Further, the longitudinal extrusion channel is in a step shape with a large front end diameter and a small rear end diameter.
Compared with the prior art, the invention has the following effects: the invention has simple and reasonable design, obtains a 2-pass Bc path sample by 1-time charging, can realize shearing deformation in three directions, has true strain of about 2.0, has good grain refinement effect, and has high extrusion efficiency, reliable extrusion process and difficult instability.
Description of the drawings:
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a module A according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a module B according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an exploded view of an embodiment of the present invention;
FIG. 5 is a diagram of the effects of Bc path tissue deformation;
FIG. 6 is a schematic perspective view of a loading seat according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of an extrusion stem in accordance with an embodiment of the present invention.
In the figure:
1-a die body; 2-module A; 3-module B; 4-a feeding seat; 5-extruding rods; 6-extruding the base; 7-locating pins; 8-a first bolt; 9-a gasket; 10-a second bolt; 11-vertical section a; 12-horizontal segment A; 13-vertical section B; 14-horizontal segment B; 15-vertical grooves; 16-a transverse slot; 17-longitudinal grooves; 18-a first positioning pin hole; 19-a second dowel hole; 20-semicircular grooves.
The specific embodiment is as follows:
the invention will be described in further detail with reference to the drawings and the detailed description.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In this embodiment, the vertical direction means extending in the up-down direction, the horizontal direction means extending in the left-right direction, and the longitudinal direction means extending in the front-rear direction.
As shown in fig. 1 to 7, the novel Bc equal-diameter angle extrusion die of the present invention comprises a die body 1, wherein a vertical extrusion channel, a horizontal extrusion channel and a longitudinal extrusion channel which have the same diameter and are sequentially communicated are arranged in the die body 1, the upper end of the vertical extrusion channel is communicated with a feeding groove, so that a sample is conveniently placed, the lower end of the vertical extrusion channel is vertically communicated with one end of the horizontal extrusion channel, and the other end of the horizontal extrusion channel is vertically communicated with the end of the longitudinal extrusion channel, namely: the vertical extrusion channels and the horizontal extrusion channels are distributed at 90 degrees, and the horizontal extrusion channels and the longitudinal extrusion channels are also distributed at 90 degrees, so that two 90-degree corners are formed, and the samples are subjected to pure shear deformation at the two corners respectively. When the test device is used, a sample is placed in the vertical extrusion channel, and the test is subjected to pure shear deformation at the corners of the vertical extrusion channel and the transverse extrusion channel and the corners of the transverse extrusion channel and the longitudinal extrusion channel. The die has the advantages that 2-pass Bc path samples are obtained through 1-time charging through ingenious combination of one vertical channel and two horizontal channels, the samples can realize shearing deformation in three directions, the true strain is about 2.0, the grain refining effect is good, the extrusion efficiency is high, the extrusion process is reliable and is not easy to be unstable, the bolt stress is reasonable, the top end of the extrusion rod can be repeatedly utilized, the assembly and disassembly are reasonable, and the like.
In this embodiment, as shown in fig. 2, the mold body includes a module A2 and a module B3 that are fastened relatively, and the abutting surfaces of the module 2A and the module B3 are respectively provided with a vertical groove 15, a horizontal groove 16 and a longitudinal groove 17 that are sequentially communicated, and the cross sections of the vertical groove, the horizontal groove and the longitudinal groove are in semicircular shapes with the same diameter; the vertical groove 15 of the module A2 and the vertical groove 15 of the module B3 are buckled to form a vertical extrusion channel with a circular cross section, the transverse groove 16 of the module A2 and the transverse groove 16 of the module 3B are buckled to form a transverse extrusion channel with a circular cross section, and the longitudinal groove 17 of the module A2 and the longitudinal groove 17 of the module B3 are buckled to form a longitudinal extrusion channel with a circular cross section.
In this embodiment, the diameters of the vertical extrusion channel, the horizontal extrusion channel and the longitudinal extrusion channel are 10mm, the length of the vertical extrusion channel is 100mm, the length of the horizontal extrusion channel is 45mm, and the length of the longitudinal extrusion channel is 90mm.
In this embodiment, the top of the module a and the top of the module B are both provided with a semicircular groove 20 which is communicated with the vertical groove, and the semicircular groove 20 of the module A2 and the semicircular groove 20 of the module B3 are buckled to form a circular feeding groove. Preferably, the diameter of the feeding groove is 60mm, and the depth is 10mm.
In this embodiment, the module A2 includes a vertical section a11 and a horizontal section a12 distributed in an L shape, and the horizontal section a12 is fixed at the lower end of the left side surface of the vertical section a 11; the front side of the vertical section A11 is a butt joint surface, the right side of the horizontal section A12 is a butt joint surface, the front side of the vertical section A11 is provided with a vertical groove 15 and a transverse groove 16, and the right side of the horizontal section A12 is provided with a longitudinal groove 17. The module B3 comprises a vertical section B13 and a horizontal section B14 which are distributed in an L shape, the horizontal section B14 is fixed at the lower end of the front side face of the vertical section B13, a vertical groove 15 and a horizontal groove 16 are formed in the rear side face of the vertical section B13, a longitudinal groove 17 is formed in the left side face of the horizontal section B14, when the module A2 is buckled with the module B3, the front side face of the vertical section A11 is attached to the rear side face of the vertical section B13 to form a vertical extrusion channel and a horizontal extrusion channel, and the right side face of the horizontal section A12 is attached to the left side face of the horizontal section B14 to form a longitudinal extrusion channel. Preferably, the vertical section A and the horizontal section A are integrally formed, and the vertical section B and the horizontal section B are integrally formed.
In this embodiment, in order to realize the quick positioning assembly of two modules, the upper end of vertical section A11 and the upper end of vertical section B13 all are equipped with diameter 8 mm's first location pinhole 18, and the front end of horizontal section A12 and the front end of horizontal section B14 all are equipped with diameter 8 mm's second location pinhole 19, all be provided with locating pin 7 in first location pinhole and the second location pinhole. A locating pin is used to ensure quick alignment accuracy.
In this embodiment, the vertical section a11 and the vertical section B13 are fixedly connected through three pairs of first bolts 8 distributed from top to bottom, wherein two pairs of first bolts are distributed at the upper and lower corners of the vertical extrusion channel and the horizontal extrusion channel, so as to avoid larger stress of the die at the corners in the experimental process; the front ends of the horizontal section A12 and the horizontal section B14 are fixedly connected through a pair of second bolts 10. Preferably, the first bolt and the second bolt are hexagon socket head cap bolts. The two modules are connected and fixed by 8 hexagon socket head cap screws 8, and are arranged on two planes; to increase the reliability of the connection, shims are added between the bolts and the mold.
In this embodiment, still include the extrusion pole 5 that is used for stretching into vertical extrusion passageway and extrudees the sample, the one end spiro union of extrusion pole 5 has extrusion base 6, and extrusion base 6 is used for contacting with universal testing machine platform extrusion end. Preferably, the length of the extrusion rod is 135mm, the diameter of the extrusion rod is 10mm, and a thread of 10mm is processed at one end of the extrusion rod 5; the diameter of the extrusion base is 60mm, the height of the extrusion base is 15mm, and a 10mm depth threaded hole is formed in the center of the extrusion base, so that the extrusion rod is matched with the extrusion base, and the extrusion rod is convenient to replace.
In this embodiment, be equipped with the material loading seat 4 of cylinder form in the material loading inslot, the diameter of material loading seat 60mm, thick 10mm, the middle part of material loading seat 4 is equipped with the vertical through-hole 21 that runs through in order to do benefit to the extrusion, and vertical through-hole diameter is 10mm, cooperatees with the extrusion pole 5 for increase the stability of extrusion pole.
In this embodiment, the longitudinal extrusion channel is stepped with a large diameter at the front end and a small diameter at the rear end. Preferably, the diameter change of the longitudinal extrusion channel starts 45mm from the channel outlet. By designing the longitudinal extrusion channel into a stepped structure, the abrasion of the sample to the die can be reduced and the discharging is convenient.
In this embodiment, the die steel is selected as the material for the die and the extrusion rod, considering that the die needs to bear a large extrusion force during extrusion. In order to make the die possess the high temperature resistance to meet the requirements of other experiments, cold and hot die steel can be selected as raw materials for processing.
In the embodiment, the total length of the die is 135mm, the total width of the die is 90mm, and the total width of the die is 150mm, and the die is fixedly connected by 8 bolts.
Specific examples: the invention is suitable for preparing a rod-shaped metal ultrafine grain material, and the experiment is carried out by taking a pure copper sample with an initial grain size of 80 mu m and a tensile strength of 200MPa, and the specific implementation method is as follows:
(1) The die main body is assembled, the die block A, B is simply buckled, the die block is rapidly positioned through the positioning pin 7, then the gasket 9 is put in, and the die block is fixed through bolts. Then assembling the extrusion rod and the extrusion base, directly screwing the extrusion rod 5 into the extrusion base 6, and preparing for extrusion;
(2) Processing a sample to be extruded to a length of 90mm and a diameter of 10mm, spraying lubricating oil on the surface of the sample to be extruded, putting the sample into a vertical extrusion channel of a die, and matching a feeding seat 4 with a feeding groove at the top of the die;
(3) The extruding rod is placed in the feeding seat 4, the whole die is placed on a platform of a universal testing machine for extrusion, the extrusion speed is set to be 60mm/min, and a certain extrusion safety margin is set because the testing machine is prevented from being pressed to the die and the feeding seat during extrusion, so that single extrusion displacement is flexibly set, and the initial pass displacement can be initially set to be 80mm. And after the experimental scheme is edited without errors, starting an equal-diameter angular extrusion experiment, and performing primary extrusion. Since the initial experimental channel is empty, there is no sample extrusion at the die tip exit; repeating the above operation to squeeze again, wherein the squeezing displacement can be set to 90mm, and the squeezing experiment is started after the experimental scheme is checked. In the experiment, the movement of the sample is completed through the action of the extrusion rod on the sample and the action between the sample and the sample, and finally, a certain number of samples with 2-pass Bc paths can be obtained through 1-time charging at the discharge hole of the die. By repeatedly charging the sample obtained at the die outlet again, a sample having 4, 6, 8, … … passes Bc path characteristics can be obtained;
(4) After the experiment is finished, the extrusion rod and the pure copper sample are tightly combined to cause difficult detachment, the die is required to be disassembled orderly, the extrusion rod 5, the feeding seat 4, the positioning pin 7, the first bolt 8, the second bolt 10 and the gasket are sequentially taken down, and finally the die A, B is separated and cleaned;
(5) When the extrusion rod 5 is carelessly bent, the extrusion base 6 can be directly screwed by selecting a new extrusion rod for replacement and assembly, so that the economy is good.
Compared with the traditional die, which only can obtain 1-pass samples after 1-pass charging, the die has higher efficiency, can obtain twice equal diameter angle extrusion samples through 1-pass charging, and can strictly obtain samples of Bc paths through the change of the angles of the die channels, so that the samples are subjected to shearing deformation in three directions, ultra-fine grain tissues can be obtained quickly, the tensile strength of a pure copper sample can be increased from 200MPa to about 380MPa through 1-pass charging, the grain size is reduced from 80 mu m to about 1.5 mu m, and the ultra-fine pure copper tissues with the tensile strength of 450MPa and the grain size of about 500nm can be obtained through only 4-pass charging.
In this embodiment, through ingenious design of the internal structure of the die, 90-degree rotation of the sample between adjacent passes relative to the previous position is completed, a 2-pass Bc path sample can be strictly obtained through 1-pass charging, and to obtain a high-pass extrusion sample, only charging is needed again, but the efficiency is improved by 50%. Because the die adopts a Bc path, the sample tissue can be sheared and deformed in three directions, and the grain refinement effect is improved. Fig. 5 shows a three-dimensional deformation effect diagram of a conventional constant diameter angle extrusion die using a Bc path, and the sample is sheared and deformed on the X, Y, Z surface, and through repeated circulation, an ultra-fine grain structure with high strength can be obtained quickly.
The invention has the advantages that: through ingenious combination of the vertical channel and the two horizontal channels, the shear deformation of the sample in three directions is finally realized, the shear effect is good, the deformation degree is large, the true strain of about 2.0 can be obtained after each charging, and the ultra-fine grain structure with high strength can be obtained rapidly. In addition, the die has the advantages of convenient assembly and disassembly, accurate positioning, simple structure, reasonable bolt distribution, high reliability, good stability, good economy and the like, and is widely applicable to preparing various rod-shaped superfine crystal materials
If the invention discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (6)
1. Novel Bc constant diameter angle extrusion die, including the mould body, its characterized in that: the die comprises a die body, wherein a vertical extrusion channel, a horizontal extrusion channel and a longitudinal extrusion channel with the same diameter are arranged in the die body, an upper material feeding groove is formed in the upper end of the vertical extrusion channel, the lower end of the vertical extrusion channel is vertically communicated with one end of the horizontal extrusion channel, and the other end of the horizontal extrusion channel is vertically communicated with the end part of the longitudinal extrusion channel;
the die body comprises a module A and a module B which are buckled relatively, wherein the butt joint surfaces of the module A and the module B are respectively provided with a vertical groove, a transverse groove and a longitudinal groove which are communicated sequentially, the vertical groove of the module A and the vertical groove of the module B are buckled to form a vertical extrusion channel, the transverse groove of the module A and the transverse groove of the module B are buckled to form a transverse extrusion channel, and the longitudinal groove of the module A and the longitudinal groove of the module B are buckled to form a longitudinal extrusion channel;
the module A comprises a vertical section A and a horizontal section A which are distributed in an L shape, and the horizontal section A is fixed at the lower end of the left side surface of the vertical section A; the module B comprises a vertical section B and a horizontal section B which are distributed in an L shape, the horizontal section B is fixed at the lower end of the front side surface of the vertical section B, the front side surface of the vertical section A and the rear side surface of the vertical section B are respectively provided with a vertical groove and a transverse groove, and the right side surface of the horizontal section A and the left side surface of the horizontal section B are respectively provided with a longitudinal groove;
the longitudinal extrusion channel is in a ladder shape with a large front end diameter and a small rear end diameter.
2. The novel Bc equal-diameter angle extrusion die of claim 1, wherein: the top of the module A and the top of the module B are respectively provided with a semicircular groove communicated with the vertical groove, and the semicircular grooves of the module A and the semicircular grooves of the module B are buckled to form a circular feeding groove.
3. The novel Bc equal-diameter angle extrusion die of claim 1, wherein: the upper end of the vertical section A and the upper end of the vertical section B are respectively provided with a first positioning pin hole, the front end of the horizontal section A and the front end of the horizontal section B are respectively provided with a second positioning pin hole, and positioning pins are respectively arranged in the first positioning pin holes and the second positioning pin holes.
4. The novel Bc equal-diameter angle extrusion die of claim 1, wherein: the vertical section A and the vertical section B are fixedly connected through a plurality of pairs of first bolts distributed from top to bottom; the front ends of the horizontal section A and the horizontal section B are fixedly connected through a pair of second bolts.
5. The novel Bc equal-diameter angle extrusion die of claim 1, wherein: the device further comprises an extrusion rod which is used for extending into the vertical extrusion channel and extruding the sample, and one end of the extrusion rod is in threaded connection with an extrusion base.
6. The novel Bc equal-diameter angular extrusion die of claim 5, wherein: the feeding groove is internally provided with a feeding seat, and the middle part of the feeding seat is provided with a vertical through hole which is favorable for extrusion penetration.
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| JP2003245712A (en) * | 2002-02-26 | 2003-09-02 | Mitsubishi Heavy Ind Ltd | Die for extrusion, and apparatus and method for manufacturing fine-structured metallic material |
| DE102005049369A1 (en) * | 2005-10-12 | 2007-04-19 | Technische Universität Clausthal | Process for the production of fine-grained, polycrystalline materials or workpieces and dies |
| CN102513395A (en) * | 2011-12-14 | 2012-06-27 | 合肥工业大学 | Equal channel angular extruding, twisting and deforming mold for large plastic forming process |
| CN103639223A (en) * | 2013-11-27 | 2014-03-19 | 山东建筑大学 | Continuous equal circular channel warm extrusion method and die with prestressed structure |
| CN103785700A (en) * | 2014-01-28 | 2014-05-14 | 徐州工程学院 | Mold and method for preparing ultrafine-grained bulk materials |
| CN104014608A (en) * | 2014-06-05 | 2014-09-03 | 徐州工程学院 | Multi-corner composite equal channel angular twist extrusion die |
| CN204564809U (en) * | 2015-05-04 | 2015-08-19 | 徐州工程学院 | A kind of T-shaped compound die for continuously extruding preparing super fine crystal material |
| RU171385U1 (en) * | 2016-04-04 | 2017-05-30 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный технологический университет "СТАНКИН" (ФГБОУ ВО "МГТУ "СТАНКИН") | Stamp for angular pressing of workpieces |
| CN206104576U (en) * | 2016-09-27 | 2017-04-19 | 徐州工程学院 | Rotatory parallel extrusion die in passageway constant diameter angle |
| CN106334716A (en) * | 2016-11-14 | 2017-01-18 | 洛阳理工学院 | Mold for flow-control-type one-time formed multidimensional bent pipe fitting and using method of mold |
| CN108555055A (en) * | 2018-04-27 | 2018-09-21 | 哈尔滨理工大学 | A kind of compound crowded torsion building mortion of variable conduit and method |
| CN213316886U (en) * | 2020-08-12 | 2021-06-01 | 陕西理工大学 | Equal-channel radial-angle extrusion die |
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| CN114309112A (en) | 2022-04-12 |
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