CN210754408U - Stepped continuous extrusion device using metal powder as raw material - Google Patents
Stepped continuous extrusion device using metal powder as raw material Download PDFInfo
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- CN210754408U CN210754408U CN201921741798.XU CN201921741798U CN210754408U CN 210754408 U CN210754408 U CN 210754408U CN 201921741798 U CN201921741798 U CN 201921741798U CN 210754408 U CN210754408 U CN 210754408U
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Abstract
The utility model provides an use cascaded continuous extrusion device of metal powder as raw and other materials, include: the extrusion wheel, the die cavity and the hopper; the annular groove on the circumferential surface of the extrusion wheel, the arc surface of the die cavity and the material blocking block are assembled to form a plurality of parallel arc-shaped channels, the channels are communicated through gaps between the extrusion wheel and the arc surface of the die cavity, only one channel in all the channels with unequal channel lengths has a radial outlet, metal powder is added through the channel which is not provided with the radial outlet and is farthest away from the radial outlet, the metal powder is extruded and rubbed in the channel between the annular groove of the extrusion wheel and the arc surface of the die cavity, under the action of high temperature and high pressure generated by friction force, metallurgical bonding is formed between the metal powder, and the metal powder is forced to be extruded into the next channel through the gap between the die cavity and the arc surface of the extrusion wheel, so that after climbing a.
Description
Technical Field
The utility model relates to an advance manufacturing technical field particularly, especially, relate to a processingequipment of superfine brilliant metal matrix combined material type wire rod of big length.
Background
The metal rod material or the particles are used as raw materials, the efficient, energy-saving and green manufacturing of the long wire rod can be realized by adopting a continuous extrusion method, the flash formed in the continuous extrusion process is simultaneously subjected to the friction force between the outer surface of the extrusion wheel and the cambered surface of the die cavity, the directions of the flash and the cambered surface of the extrusion wheel are opposite, the flash is also subjected to the action of three-way pressure stress, strong shearing deformation is generated, and the grain refining effect is obvious. With the continuous progress of nanotechnology and the urgent need for light weight, the research and application fields of nano-reinforced phase-reinforced light alloy composite materials are gradually expanded, the research on nano-reinforced light alloy composite materials is mainly focused on the aspects of improving the dispersibility and interface combination of a reinforcement at present, the attention on the light metal matrix structure is less, and the metal matrix is refined into ultra-fine grain or nano-grain structures by using deformation methods such as equal channel Extrusion (ECAP), High Pressure Torsion (HPT), Friction Stir (FSP), high pressure reduction controlled rolling and the like, the composite materials taking the nano-material as the reinforcement and the ultra-fine grain or nano-grain light metal as the matrix are developed, so that the light metal matrix composite materials with high temperature superplasticity and high strength at room temperature are expected to be developed. When metal powder is used as a raw material and a traditional continuous extrusion process is adopted to carry out continuous extrusion on the metal-based composite material type wire rod, defects such as reinforced phase segregation and cavities can be formed due to insufficient deformation.
Disclosure of Invention
In view of the above-mentioned problems, a method and apparatus for producing a long length of ultra-fine grain metal matrix composite type wire rod by a stepwise continuous extrusion method using a metal powder to which a reinforcement is added as a raw material are provided. The relative motion between the extrusion wheel and the die cavity is utilized to lead the metal powder matrix between the extrusion wheel and the die cavity to generate strong shearing deformation and grain refinement, simultaneously, the nano reinforcement is dispersed and distributed in the metal matrix through large deformation and high strain rate, the composite blank after several times of strong plastic deformation enters the groove of the extrusion wheel, and is extruded by the die hole under the action of the friction force of the wheel groove to form a molded wire product.
The utility model discloses a technical means as follows:
a stepwise continuous extrusion apparatus using metal powder as a raw material, comprising: the extrusion wheel, the die cavity and the hopper;
the die cavity is assembled on one side of the extrusion wheel, and the side of the die cavity close to the extrusion wheel is a die cavity cambered surface matched with the outer circumferential surface of the extrusion wheel;
the periphery of the extrusion wheel is provided with at least two annular grooves, the die cavity cambered surface of the die cavity is provided with material blocking blocks with the same number, the material blocking blocks and the material blocking blocks are assembled together to form a plurality of parallel arc-shaped channels, the channels are communicated through a gap between the extrusion wheel and the die cavity cambered surface, the lengths of the channels are unequal and are arranged in a V shape or a step shape, only one channel in all the channels is provided with a radial outlet, namely, a radial discharge hole is arranged near the end surface of only one material blocking block, metal powder is added through a channel without the radial outlet at the farthest end away from the radial outlet, the metal powder is extruded and rubbed in the channel between the annular groove of the extrusion wheel and the die cavity cambered surface of the die cavity, under the action of high temperature and high pressure generated by friction, metallurgical bonding is formed between the metal powder, the metal powder is forced to be extruded into the next channel through, extruding from a radial outlet of the die cavity;
the hopper is arranged on one side of the die cavity, and a feed inlet of the hopper is communicated with a preset opening of a channel without a radial outlet at the farthest end formed by matching the die cavity and the extrusion wheel.
The fit clearance between the outer circumferential surface of the extrusion wheel and the cambered surface of the die cavity is 0.1-0.4 mm, and the width L of the working surface of the extrusion wheel is 0.2-0.6 mm larger than the width W of the working surface of the die cavity.
The metal powder raw material can be replaced by a metal rod as the raw material.
Further, in the above-mentioned case,
the shape of the die cavity is a cuboid, the upper surface is an arc-shaped curved surface, the other side surfaces are planes, one end of the arc-shaped curved surface is provided with at least two material blocking blocks, the width of each material blocking block is smaller than the width of the groove of the extrusion wheel, the distance between the material blocking blocks is equal to the distance between the wheel grooves, and the end surfaces of the two adjacent material blocking blocks are not on the same plane; the radial discharge hole is formed near the end surface of only one material blocking block in all the material blocking blocks, and the distance between the end surface of the material blocking block and the front end surface is the minimum; the other material blocking blocks are provided with arc-shaped grooves in front, the arc-shaped grooves are coaxial with the arc surface, the other end of the arc-shaped groove farthest from the radial discharge hole is communicated with the feed hole, the feed hole inwards extends to the arc-shaped grooves from the rear end face, and the front end face and the rear end face are two opposite side faces of a cuboid and are parallel to the axis of the arc surface; the radius of the arc surface is larger than that of the arc surface, and the end surface of the material blocking block corresponding to the feeding hole is farthest away from the surface.
Further, in the above-mentioned case,
when the material blocking blocks are arranged in a V shape, the number of the material blocking blocks is odd, the feeding holes are positioned at two sides, and the radial discharging holes are positioned in the middle; when the material blocking blocks are arranged in a stepped mode, the feeding holes and the radial discharging holes are respectively located on the two outermost channels.
Further, in the above-mentioned case,
the extrusion wheel is a circular ring-shaped part, at least two annular grooves are formed in the outer circumferential surface, bosses are arranged at two ends of each annular groove, a transverse groove is formed in the circumferential surface between the two annular grooves, and the included angle between the central line of each transverse groove and the axis of the extrusion wheel ranges from 0 degree to 30 degrees.
The utility model adopting the technical scheme, through the annular groove on the extrusion wheel periphery, many arc passageways that are parallel to each other are formed with the assembly of the material blocking block of the die cavity cambered surface of die cavity, the passageway is communicated through the clearance between extrusion wheel and die cavity cambered surface, passageway length inequality (realized through the shutoff of material blocking block in different length positions), be "V" shape or ladder-shaped arrangement (namely the shutoff position arrangement rule of material blocking block, "V" shape assembles the range to the center slope, ladder-shaped is arranged to the low point by step from the high point), only one passageway has the radial export in all passageways, metal powder is added through the passageway that does not have the radial export farthest from the radial export, metal powder is extrusion friction in the passageway between the annular groove of extrusion wheel and the die cavity cambered surface of die cavity, under the high temperature and the high pressure effect that frictional force produced, form metallurgical combination between the metal powder, and is forced to be extruded into the next channel from the clearance between the die cavity and the cambered surface of the extrusion wheel, and after climbing several channels, the extrusion is carried out from the radial outlet of the die cavity (the position of the radial outlet can be additionally assembled with the extrusion die for forming).
Compared with the prior art, the utility model has the advantages of it is following:
1. the method is suitable for metal powder raw materials and metal rod raw materials.
2. The number of extrusion stages can be customized according to different metal raw materials and different required processes.
3. Through multi-pass strong shearing deformation, the metal grains are refined, and the product performance is excellent.
4. The composite material type wire rod with the reaching degree can be formed at one time through extrusion of the die.
5. The structural design is mature, the device stability is high, and the continuous processing can be stabilized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of the three-dimensional structure of the working structure of the present invention.
Fig. 2 is a schematic view of the three-dimensional structure of the extrusion wheel of the present invention.
Fig. 3 is a partial transverse sectional view of the extrusion wheel of the present invention.
Fig. 4 is a partial enlarged view of the working position of the extrusion wheel and the die cavity of the present invention.
Fig. 4a is a cross-sectional view a-a of fig. 4 when the channels of the present invention are arranged in a "V" configuration.
Fig. 4B is a cross-sectional view B-B of fig. 4 when the channels of the present invention are arranged in a "V" configuration.
Fig. 4C is a cross-sectional view of the channel of fig. 4 in a "V" arrangement according to the present invention.
Fig. 4d is a cross-sectional view a-a of fig. 4 when the channels of the present invention are arranged in a step-like fashion.
Fig. 4e is a cross-sectional view B-B of fig. 4 when the channels of the present invention are arranged in a step-like manner.
Fig. 4f is a cross-sectional view of fig. 4C-C when the channels of the present invention are arranged in a step-like fashion.
Fig. 5 is a schematic view of the axial overlooking angle of the die cavity when the channels are arranged in a V shape according to the present invention.
Fig. 6 is a schematic view of the mold cavity axial side bottom view angle three-dimensional structure when the channels are arranged in a V shape.
Fig. 7 is a cross-sectional view of the mold cavity with the channels arranged in a "V" configuration in accordance with the present invention.
Fig. 8 is a top view of the mold cavity of the present invention with the channels arranged in a "V" configuration.
Fig. 9 is a schematic view of the axial overlooking angle of the die cavity when the channels are arranged in a step shape.
In the figure:
21. a circular arc-shaped channel;
22. a gap;
23. a radial outlet,
31. An extrusion wheel; 311. an annular groove; 312. an outer circumferential surface; 313. a boss; 314. a lateral trench;
32. a mold cavity; 321. a material blocking block; 322. a cambered surface; 323. a radial discharge hole; 324. an arc-shaped groove; 325. a feed port; 326. a front end face; 327. a circular arc surface; 328. a rear end face; 329. an end face;
33. and (4) a hopper.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 9, the present invention provides a stepped continuous extrusion apparatus using metal powder as raw material, comprising: the pressing wheel 31, the cavity 32, and the hopper 33;
the die cavity 32 is assembled at one side of the extrusion wheel 31, and the side of the die cavity 32 close to the extrusion wheel 31 is a die cavity arc surface 322 matched with the outer circumferential surface 312 of the extrusion wheel;
at least two annular grooves 311 are arranged on the circumferential surface of the extrusion wheel 31, the die cavity arc surface 322 of the die cavity 32 is provided with material blocking blocks 321 with the same number, the two are assembled together to form a plurality of parallel arc-shaped channels 21, the channels are communicated through a gap 22 between the extrusion wheel and the die cavity arc surface 322, the lengths of the channels are unequal and are arranged in a V shape or a step shape, only one channel in all the channels is provided with a radial outlet 23, namely, a radial discharge hole 323 is arranged near the end surface 329 of only one material blocking block, metal powder is added through the channel without the radial outlet at the farthest end from the radial outlet 23, the metal powder is extruded and rubbed in the channel between the annular groove 311 of the extrusion wheel 31 and the die cavity arc surface 322 of the die cavity 32, metallurgical bonding is formed between the metal powder under the action of high temperature and high pressure generated by friction force, and the metal powder is forced to be extruded into the next channel through, after climbing several passages in this way, it is extruded from the radial outlet 23 of the die cavity 32;
the extruded finished material is directly cooled by an additional cooling device (a spraying cooling device is usually selected, and a cooling medium is determined according to the metal material and the temperature);
the hopper 33 is disposed at one side of the cavity 32, and its feeding port is communicated with a predetermined opening of a farthest radial-outlet-free channel formed by the cavity 32 and the pressing wheel 31.
The fit clearance between the outer circumferential surface 312 of the extrusion wheel and the arc surface 322 of the die cavity is 0.1-0.4 mm, and the width L of the working surface of the extrusion wheel 31 is 0.2-0.6 mm larger than the width W of the working surface of the die cavity 32.
The metal powder raw material can be replaced by a metal rod as the raw material.
Further, as shown in fig. 5 to 9,
the shape of the die cavity 32 is a cuboid, the upper surface is an arc-shaped curved surface, the other side surfaces are planes, one end of the arc-shaped curved surface is provided with at least two material blocking blocks 321, the width of each material blocking block 321 is smaller than that of the groove of the extrusion wheel, the distance between the material blocking blocks is equal to the distance between the wheel grooves, and the end surfaces 329 of two adjacent material blocking blocks are not on the same plane; in all the material blocking blocks 321, only one material blocking block is provided with a radial discharge hole 323 near the end face 329, and the distance between the end face 329 and the front end face 326 of the material blocking block is the minimum; the arc-shaped grooves 324 are formed in the front of the other material blocking blocks 321, the arc-shaped grooves 324 are coaxial with the arc surfaces 322, the other ends of the arc-shaped grooves 324 which are farthest away from the radial discharge holes 323 are communicated with the feeding holes 325, the feeding holes extend inwards to the arc-shaped grooves 324 from the rear end surface 328, and the front end surface 326 and the rear end surface 328 are two opposite side surfaces of a cuboid and are parallel to the axis of the arc surface; the radius of the circular arc surface 327 is larger than that of the circular arc surface 322, and the end surface of the material blocking block corresponding to the feeding hole 325 is farthest away from the surface.
Further, as shown in FIGS. 4a to 9,
when the material blocking blocks 321 are arranged in a V shape, the number of the material blocking blocks is odd, the feeding holes are positioned at two sides, and the radial discharging holes 323 are positioned in the middle; when the material blocking blocks 321 are arranged in a stepped manner, the feeding holes 325 and the radial discharging holes 323 are respectively positioned on two outermost passages.
Further, as shown in fig. 2 and 3,
the extrusion wheel 31 is a circular ring-shaped part, at least two annular grooves 311 are arranged on the outer circumferential surface 312, bosses 313 are arranged at two ends of the outer circumferential surface, a transverse groove 314 is arranged on the circumferential surface between the two annular grooves 311, and the included angle between the central line of the transverse groove 314 and the axial line of the extrusion wheel is 0-30 degrees.
The utility model adopting the technical scheme, through the annular groove 311 on the periphery of the extrusion wheel 31, form many arc-shaped channels 21 that are parallel to each other with the material stop block 321 of the die cavity cambered surface 322 of die cavity 32, the gap 22 between the extrusion wheel and the die cavity cambered surface 322 between the channels is communicated, the channel length is unequal (realized by the blocking of the material stop block 321 in different length positions), the channel is arranged in a V shape or step shape (namely the blocking position of the material stop block 321 is arranged regularly, the V shape is arranged by inclining to the center, the step shape is arranged from high point to low point step by step), only one channel in all channels has a radial outlet 23, the metal powder is added through the channel without the radial outlet at the farthest end from the radial outlet 23, the metal powder extrudes friction in the channel between the annular groove 311 of the extrusion wheel 31 and the die cavity cambered surface 322 of the die cavity 32, under the action of high temperature and high pressure generated by friction, metal powder forms metallurgical bonding and is forced to be extruded into the next channel from the gap 22 between the die cavity and the cambered surface of the extrusion wheel, and after climbing several channels, the metal powder is extruded from a radial outlet 23 of the die cavity 32 (the position of the radial outlet can be additionally assembled with an extrusion die for forming).
The first embodiment is as follows:
the outer diameter of the extrusion wheel (31) is 400mm, the step height is 5mm, three annular grooves are formed in the circumferential surface, the width of each annular groove is 12.5mm, and the wheel groove interval is 40 mm; three material blocking blocks are arranged on the corresponding die cavity (32) in a step-shaped distribution, and the distance between the end faces of the material blocking blocks is 25 mm; the fit clearance between the outer circumferential surface (312) of the extrusion wheel and the arc surface (322) of the die cavity is 0.3mm, and the size L of the extrusion wheel is 0.5mm larger than the size W of the die cavity.
When the extrusion device works, the extrusion wheel (31) and the die cavity (32) are concentrically arranged, the hopper (33) is arranged on the feeding hole (325) of the die cavity (32), the mixed metal powder is added into the hopper, the extrusion wheel (31) is started to rotate clockwise in a clockwise direction prevention mode, and after a product is extruded, the extrusion wheel is immediately sprayed and cooled and then wound.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (6)
1. A stepped continuous extrusion apparatus using metal powder as a raw material, comprising: an extrusion wheel (31), a die cavity (32) and a hopper (33);
the die cavity (32) is assembled at one side of the extrusion wheel (31), and a die cavity arc surface (322) matched with the outer circumferential surface (312) of the extrusion wheel is arranged at one side, close to the extrusion wheel (31), of the die cavity (32);
at least two annular grooves (311) are formed in the circumferential surface of the extrusion wheel (31), material blocking blocks (321) with the same number are arranged on the die cavity arc surface (322) of the die cavity (32) and assembled together to form a plurality of parallel arc-shaped channels (21), the channels are communicated through gaps (22) between the extrusion wheel and the die cavity arc surface (322), the lengths of the channels are unequal and are arranged in a V shape or a step shape, only one channel in all the channels is provided with a radial outlet (23), namely, only one radial discharge hole (323) is arranged near the end surface (329) of the material blocking block, metal powder is added through the channel without the radial outlet at the farthest end from the radial outlet (23), the metal powder is extruded and rubbed in the channel between the annular grooves (311) of the extrusion wheel (31) and the die cavity arc surface (322) of the die cavity (32), and under the action of high temperature and high pressure generated by friction force, the metal powder forms a metallurgical bond and is forced to be extruded into the next channel from a gap (22) between the die cavity and the cambered surface of the extrusion wheel, and the metal powder is extruded from a radial outlet (23) of the die cavity (32) after climbing several channels;
the hopper (33) is arranged on one side of the die cavity (32), and a feed inlet of the hopper is communicated with a preset opening of a channel without a radial outlet at the farthest end formed by matching the die cavity (32) with the extrusion wheel (31).
2. The stepwise continuous extrusion apparatus as set forth in claim 1, wherein:
the fit clearance between the outer circumferential surface (312) of the extrusion wheel and the arc surface (322) of the die cavity is 0.1-0.4 mm, and the width L of the working surface of the extrusion wheel (31) is 0.2-0.6 mm larger than the width W of the working surface of the die cavity (32).
3. The stepwise continuous extrusion apparatus as set forth in claim 1, wherein:
the metal powder raw material can be replaced by a metal rod as the raw material.
4. The stepwise continuous extrusion apparatus as set forth in claim 1, 2 or 3, wherein:
the shape of the die cavity (32) is a cuboid, the upper surface is an arc-shaped curved surface, the other side surfaces are planes, one end of the arc-shaped curved surface is provided with at least two material blocking blocks (321), the width of each material blocking block (321) is smaller than the width of the groove of the extrusion wheel, the distance between the material blocking blocks and the wheel groove is equal, and the end surfaces (329) of two adjacent material blocking blocks are not on the same plane; in all the material blocking blocks (321), a radial discharge hole (323) is formed near the end surface (329) of only one material blocking block, and the distance between the end surface (329) of the material blocking block and the front end surface (326) is the minimum; arc-shaped grooves (324) are formed in the front of the other material blocking blocks (321), the arc-shaped grooves (324) are coaxial with the arc-shaped surfaces (322), the other ends of the arc-shaped grooves (324) which are farthest away from the radial discharge holes (323) are communicated with the feeding holes (325), the feeding holes extend inwards to the arc-shaped grooves (324) from the rear end face (328), the front end face (326) and the rear end face (328) are two opposite side faces of a cuboid, and the front end face and the rear end face are parallel to the axis of the arc-shaped surfaces; the radius of the arc surface (327) is larger than that of the arc surface (322), and the end surface of the material blocking block corresponding to the feeding hole (325) is farthest away from the surface.
5. The stepwise continuous extrusion apparatus as set forth in claim 4, wherein:
when the material blocking blocks (321) are arranged in a V shape, the number of the material blocking blocks is odd, the feeding holes are positioned at two sides, and the radial discharging holes (323) are positioned in the middle; when the material blocking blocks (321) are arranged in a stepped manner, the feeding holes (325) and the radial discharging holes (323) are respectively positioned on two outermost passages.
6. The stepwise continuous extrusion apparatus as set forth in claim 5, wherein:
the extrusion wheel (31) is a circular ring-shaped part, at least two annular grooves (311) are formed in the outer circumferential surface (312), bosses (313) are arranged at two ends of the outer circumferential surface, a transverse groove (314) is formed in the circumferential surface between the two annular grooves (311), and the included angle between the central line of the transverse groove (314) and the axis of the extrusion wheel ranges from 0 degree to 30 degrees.
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| CN110560501A (en) * | 2019-10-17 | 2019-12-13 | 大连交通大学 | Stepped continuous extrusion device using metal powder as raw material |
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