CN112475298A - Metal powder continuous forming device and method - Google Patents

Metal powder continuous forming device and method Download PDF

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Publication number
CN112475298A
CN112475298A CN202011249475.6A CN202011249475A CN112475298A CN 112475298 A CN112475298 A CN 112475298A CN 202011249475 A CN202011249475 A CN 202011249475A CN 112475298 A CN112475298 A CN 112475298A
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metal
metal foil
forming
metal powder
foil strip
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CN202011249475.6A
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Chinese (zh)
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赵方
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/004—Filling molds with powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/005—Loading or unloading powder metal objects

Abstract

The invention discloses a metal powder continuous forming method, which comprises the following steps: continuously drawing and sending out the metal foil strip, rolling the metal foil strip into a tubular shape, and welding to form a tubular cavity; filling metal powder with the same material as the metal foil strip into the cavity to form a coating pipe; radially extruding the cladding tube to compact the metal strips and metal powder; obtaining the strip-shaped metal section. The invention also discloses a metal powder continuous forming device, which comprises a pay-off device, a traction device, a feeding device, a welding forming device and an extrusion device.

Description

Metal powder continuous forming device and method
Technical Field
The invention relates to the field of metal powder forming, in particular to a metal powder continuous forming device and a metal powder continuous forming method.
Background
The traditional metal powder metallurgy is a process of manufacturing finished products and metal materials by using various metal powders as raw materials through press forming, sintering and necessary subsequent treatment. In the 30 s of the 20 th century, porous oil-retaining bearings were successfully manufactured by a metal powder metallurgy process, and with the application of cheap iron powder, the powder metallurgy process began to be applied in industrial fields such as automobiles, textiles and the like on a large scale. In recent years, metal powder metallurgy has become a processing method for manufacturing new materials. The specific flow of powder metallurgy is as follows: first, preparing and preparing raw material powder, wherein the powder can be pure metal, nonmetal, metal compound and other compounds; secondly, designing a mould according to a product, and pressing the powder into a shape required by a finished product; and finally sintering and molding. Continuous extrusion is one of the main production methods for producing nonferrous metals and steel materials, producing parts and forming and processing the parts, and is also an important method for preparing and processing advanced materials such as various composite materials, powder materials and the like. The continuous extrusion uses granular material or rod material as blank material, and skillfully utilizes the friction force between the deformed metal and the tool. The annular channel formed by the rectangular section groove on the rotating extrusion wheel and the fixed die holder plays the role of an extrusion cylinder in a common extrusion method, and when the extrusion wheel rotates, the rod-shaped blank is continuously fed in by virtue of the friction force on the wall of the groove to realize continuous extrusion. The friction heating between the blank and the tool surface is more remarkable during continuous extrusion, so that for low-melting-point metals such as aluminum and aluminum alloy, the temperature of a deformation zone can be raised by 400-500 ℃ without external heating, and the hot extrusion is realized. Although the traditional process solves many production needs, it is widely used. However, with the rapid development of the industry, the requirements for raw materials are higher and higher, and the traditional manufacturing process cannot meet the requirements of the modern industry. The prior art can not meet the requirement of directly carrying out continuous extrusion production by taking powder as a raw material.
Disclosure of Invention
The invention provides a metal powder continuous forming device and a metal powder continuous forming method, which aim to solve the problems.
A continuous forming method of metal powder, comprising the steps of:
s1, continuously drawing and sending out the metal foil strip, rolling the metal foil strip into a tubular shape, and welding the metal foil strip to form a tubular cavity;
s2, filling metal powder with the same material as the metal foil strip into the cavity to form a coating pipe;
s3, radially extruding the cladding pipe, and compacting the metal strips and the metal powder to form a product piece.
Further, two sides of the metal foil strip are gradually curled towards one side of the metal foil strip until the two sides of the metal foil strip are butted together, and the two sides of the metal foil strip are welded by argon arc welding.
Further, the metal foil strip moves from top to bottom, gradually forming a tubular continuous cavity from top to bottom, in which cavity a feed tube is inserted, through which the metal powder is filled into the cavity.
Further, a feed pipe is arranged in the cavity, the feed pipe is not in contact with the metal mooring belt, and an outlet of the feed pipe is closer to the forming direction of the metal cladding pipe than the initial welding forming position of the metal mooring belt.
The device for the continuous forming method of the metal powder comprises a pay-off device, a traction device, a feeding device, a welding forming device and an extrusion device.
Further, the welding forming device comprises a forming roller and an argon arc welding machine, wherein the forming roller is used for curling the metal foil strip into a tubular shape, the two sides of the metal foil strip are butted in a curling mode, and the argon arc welding machine is used for welding the two sides of the metal foil strip.
Further, the forming rollers have a plurality of groups, a plurality of groups of forming rollers are installed on the rack from top to bottom, each group of forming rollers comprises at least two forming rollers, a feeding space is arranged between each group of forming rollers, the feeding device comprises a feeding pipe, and the feeding pipe penetrates through the feeding space and extends into the cavity.
Further, the feed tube is not in contact with the metal foil strip.
Further, the extrusion device comprises a reducing device and an extruder, wherein the reducing device comprises at least two rollers arranged along the extrusion forming direction of the cladding pipe.
Further, feed arrangement includes hopper and inlet pipe, the lower extreme of hopper with be equipped with the pay-off passageway between the inlet pipe, be equipped with the screw rod in the pay-off passageway, the screw rod is by motor drive.
The invention discloses a metal powder continuous forming device and a metal powder continuous forming method, wherein a metal foil is continuously pulled and conveyed, meanwhile, the metal foil is curled into a tubular shape, metal powder is filled in the tubular shape, then, the tubular shape is compacted and formed through a reducing device and an extruder, and a metal foil belt and the metal powder are continuously supplied, so that the continuous extrusion forming by taking the metal powder as a raw material can be realized, the production efficiency is improved, the production cost is reduced, in addition, in the forming process, sintering is not needed, and the energy saving and the environmental protection are better compared with the traditional process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a continuous metal powder molding apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a welding forming apparatus disclosed in an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a first set of forming rollers of the welding forming apparatus disclosed in an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a second set of forming rollers of the welding forming apparatus disclosed in an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a third set of forming rollers of the welding forming apparatus disclosed in an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a fourth set of forming rolls of the welding forming apparatus disclosed in an embodiment of the present invention;
FIG. 7 is a schematic view illustrating a gradual curling of a metal foil strip in a continuous forming method of metal powder according to an embodiment of the present invention;
fig. 8 is a schematic structural view of the feeding device disclosed in the embodiment of the present invention.
In the figure: 1. a pay-off device; 2. a metal foil tape; 3. dragging and shearing a butt welding machine; 4. a tractor; 5. a feeding device; 6. welding a forming device; 7. a cladding tube; 8. a reducing device; 9. an extruder; 10. a cooling device; 11. meter rice swing arm, 12, product collection device.
Detailed Description
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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A continuous forming method of metal powder, comprising the steps of:
s1, continuously drawing and sending out the metal foil strip, rolling the metal foil strip into a tubular shape, and welding the metal foil strip to form a tubular cavity;
s2, filling metal powder with the same material as the metal foil strip into the cavity to form a coating pipe;
s3, radially extruding the cladding pipe, and compacting the metal strips and the metal powder to form a product piece.
In this embodiment, adopt aluminium foil and aluminium powder as raw and other materials, metal foil strip 2 is pulled from pay-off through draw gear and is sent out, draw gear is including pulling shearing butt welder 3 and tractor 4, pulls shearing butt welder 3 and pulls out metal foil strip 2 to cut the joint of two rolls of foil pieces neatly and weld, then the tractor continues to pull, the tractor is prior art with pulling shearing butt welder, metal foil strip is through the shaping roller, and multiunit shaping roller will metal foil strip both sides upwards curl gradually, until the both sides butt joint of metal foil strip is in the same place, and adopt argon arc welding, will the both sides welding of metal foil strip forms pipy cavity.
The multiple sets of forming rollers are arranged from top to bottom, the metal foil strip moves from top to bottom and is gradually formed to form a tubular continuous cavity from top to bottom, the feed pipe 52 is inserted into the cavity from top to bottom, and the metal powder feed pipe enters the cavity and is filled into the cavity from top to bottom.
The feed pipe is not contacted with the metal mooring belt, and the outlet of the feed pipe is closer to the forming direction of the metal cladding pipe than the initial welding forming position of the metal mooring belt. The both sides butt joint of foil strip is in the same place the back together, is welded by the argon arc welding machine, and in this embodiment, inlet pipe exit position is more lower than argon arc welding machine position, and like this, the welding has one section cooling distance after the welding, and the foil strip lasts to be transported, and in the time through this section cooling distance, the splice cools off gradually, until through inlet pipe exit position, metal powder gets into the cavity, and with the splice contact, the splice after the cooling can not take place the adhesion with metal powder. The metal powder is filled into the cavity to form the cladding tube. Argon arc welding is provided with a nitrogen cooling welding line device besides anti-oxidation protection of the welding line by using argon gas, and the nitrogen gas is used for protecting inert gas in a space between the feeding pipe and the metal foil welding pipe besides cooling the welding line.
In this embodiment, as shown in fig. 1, the metal mooring belt is pulled and sent from left to right, and the moving direction is changed from top to bottom at the position of the welding and forming device, so that the pulling direction from left to right is restored after the cladding pipe is formed.
The cladding pipe enters a reducing device, the reducing device adopts multi-pass roller type hole reducing, and the diameter of the final finished product rod is 9.5-40 mm. The device has two meanings, one is that metal powder is compacted, the defect that the argon arc welding speed is too low is overcome, the argon arc welding speed is 0.8-2.5m/min, the production line speed is improved through reducing, and the yield of the production line is improved to the maximum extent.
After the diameter reduction device, the material enters an extruder, the embodiment adopts a 350 continuous extruder, the material is extruded and molded again according to the size required by the final product, the extrusion pressure of 400Mpa to 1000Mpa is formed in an extrusion cavity in the process, the product generates heat in a large amount in the extrusion process, the interior of the product is tighter, and the physical performance of the product is improved.
And (4) after passing through the extruder, feeding the extruded metal strip into a cooling device to cool the product, and finally obtaining the metal strip-shaped section which is collected by a product collecting device.
A metal powder continuous forming device comprises a pay-off device, a traction device, a feeding device, a welding forming device and an extrusion device. The traction device comprises a pair of rollers, the metal foil is pulled out from the pay-off device and sent out to the welding forming device, the welding forming device enables two sides of the metal foil to be in curling butt joint and welded into a metal foil pipe, the feeding device is arranged on the welding forming device and used for providing filled metal powder for the welding formed metal foil pipe inner device, and the extruding device comprises a reducing device and an extruding machine and enables the cladding pipe to be extruded and formed.
The welding forming device comprises a forming roller and an argon arc welding machine, wherein the forming roller is used for curling the metal foil strip into a tubular shape, the two sides of the metal foil strip are butted in a curling mode, and the argon arc welding machine is used for welding the two sides of the metal foil strip. Argon arc welding is provided with a nitrogen cooling welding line device besides anti-oxidation protection of the welding line by using argon gas, and the nitrogen gas is used for protecting inert gas in a space between the feeding pipe and the metal foil welding pipe besides cooling the welding line.
The forming rollers have a plurality of groups, a plurality of groups of forming rollers are installed on the machine frame from top to bottom, each group of forming rollers comprises at least two forming rollers, a feeding space is arranged between every group of forming rollers, the feeding device comprises a feeding pipe, and the feeding pipe penetrates through the feeding space and stretches into the cavity.
In this embodiment, four sets of forming rollers are provided, as shown in fig. 2, the first set of forming roller 61, the second set of forming roller 62, the third set of forming roller 63, and the fourth set of forming roller 64 are sequentially fixed on the frame from top to bottom, as shown in fig. 3, the first set of forming roller 61 includes two forming rollers, the forming roller 612 has two conical surfaces, the small diameter ends of the two conical surfaces are connected with a cylindrical surface, the forming roller 611 has a conical surface matched with the conical surface of the forming roller 612, the cylindrical surface 611 is provided with an inward concave arc surface at a position matched with the cylindrical surface, and the inward concave arc surface enables an arc-shaped feeding space to exist between the two forming rollers of the first set of forming roller 61; as shown in fig. 4, the second set of forming rollers 62 includes a forming roller 621 and a forming roller 622, both the forming roller 621 and the forming roller 622 have arc surfaces, the axial directions of the two arc surfaces are overlapped to form a larger arc surface, a feeding space is provided above the larger arc surface, and the two arc surfaces are respectively in contact with one side of the metal foil to continuously curl two sides of the metal foil 13. As shown in fig. 5, the third group of forming rollers 63 includes a forming roller 631 and a forming roller 632, both of which have arc surfaces, the two arc surfaces are oppositely arranged, and the radian of the arc surface of the third group of forming rollers is greater than that of the arc surface of the second group of forming rollers. Both sides of the metal foil are in contact with the arc surfaces of the forming rollers 631. The two sides of the metal foil 13 are gradually curled, the radian of a curved surface formed by curling is gradually larger than 180 degrees, the space in the middle of the curved surface is a feeding space, and the feeding pipe penetrates through the middle of the feeding space. As shown in fig. 6, the fourth set of forming rollers includes a forming roller 641 and a forming roller 642, both the forming roller 641 and the forming roller 642 have arc surfaces, the two arc surfaces are disposed opposite to each other, one side of the metal foil contacts with the forming roller 641, the other side of the metal foil contacts with the forming roller 642, and the contact positions of the two sides do not contact with the forming roller, so as to facilitate welding by an argon arc welding machine. As shown in fig. 7, the two sides of the metal foil 13 are gradually curled, the curvature of the curved surface formed by curling gradually approaches 360 degrees, the space in the middle of the curved surface is a feeding space, and the feeding pipe 52 passes through the middle. The feed tube 52 is not in contact with the metal foil strip 13.
The extruding device comprises a reducing device and an extruding machine, the reducing device comprises at least two rollers arranged along the extrusion forming direction of the cladding pipe, and the metal powder and the metal foil in the cladding pipe are pressed together and gradually compacted through a plurality of groups of rollers. The extruder adopts a 350 extruder to realize continuous extrusion.
As shown in fig. 8, the feeding device comprises a hopper 51 and a feeding pipe 52, a feeding channel is arranged between the lower end of the hopper 51 and the feeding pipe 52, a screw is arranged in the feeding channel, and the screw is driven by a motor 57. A stirring rod is arranged in the hopper 51, the motor 57 is a variable frequency motor and is in transmission connection with the double-output gear box 53, the output end of the double-output gear box 53 is respectively connected with the screw 55 and the stirring rod 54, the screw 55 rotates to convey metal powder in the hopper 51 into the connecting hopper 56 above the feeding pipe 52 and enter the feeding pipe 52, and the filling speed of the metal powder can be adjusted by adjusting the rotating speed of the motor.
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; while the invention has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A continuous molding method of metal powder is characterized in that: the method comprises the following steps:
s1, continuously drawing and sending out the metal foil strip, rolling the metal foil strip into a tubular shape, and welding the metal foil strip to form a tubular cavity;
s2, filling metal powder with the same material as the metal foil strip into the cavity to form a coating pipe;
s3, radially extruding the cladding pipe, and compacting the metal strips and the metal powder to form a product piece.
2. The continuous molding method of metal powder according to claim 1, wherein: and gradually curling two sides of the metal foil strip towards one side of the metal foil strip until the two sides of the metal foil strip are butted together, and welding the two sides of the metal foil strip by adopting argon arc welding.
3. The continuous molding method of metal powder according to claim 1, wherein: the metal foil strip moves from top to bottom, gradually forming a tubular continuous cavity from top to bottom, in which cavity a feed pipe is inserted, through which the metal powder is filled into the cavity.
4. The continuous molding method of metal powder according to claim 1, wherein: and a feeding pipe is arranged in the cavity, the feeding pipe is not contacted with the metal mooring belt, and an outlet of the feeding pipe is closer to the forming direction of the metal cladding pipe than the initial welding forming position of the metal mooring belt.
5. An apparatus for carrying out the continuous molding method of metal powder according to any one of claims 1 to 4, characterized in that: comprises a pay-off device, a traction device, a feeding device, a welding forming device and an extrusion device.
6. The continuous molding apparatus for metal powder according to claim 5, wherein: the welding forming device comprises a forming roller and an argon arc welding machine, wherein the forming roller is used for curling the metal foil strip into a tubular shape, the two sides of the metal foil strip are butted in a curling mode, and the argon arc welding machine is used for welding the two sides of the metal foil strip.
7. The continuous molding apparatus for metal powder according to claim 6, wherein: the forming rollers have a plurality of groups, a plurality of groups of forming rollers are installed on the machine frame from top to bottom, each group of forming rollers comprises at least two forming rollers, a feeding space is arranged between every group of forming rollers, the feeding device comprises a feeding pipe, and the feeding pipe penetrates through the feeding space and stretches into the cavity.
8. The continuous molding apparatus for metal powder according to claim 7, wherein: the feed tube is not in contact with the metal foil strip.
9. The continuous molding apparatus for metal powder according to claim 5, wherein: the extrusion device comprises a reducing device and an extruder, wherein the reducing device comprises at least two rollers arranged along the extrusion forming direction of the cladding pipe.
10. The continuous molding apparatus for metal powder according to claim 5, wherein: the feeding device comprises a hopper and an inlet pipe, a feeding channel is arranged between the lower end of the hopper and the inlet pipe, a screw rod is arranged in the feeding channel, and the screw rod is driven by a motor.
CN202011249475.6A 2020-11-10 2020-11-10 Metal powder continuous forming device and method Pending CN112475298A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011249475.6A CN112475298A (en) 2020-11-10 2020-11-10 Metal powder continuous forming device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011249475.6A CN112475298A (en) 2020-11-10 2020-11-10 Metal powder continuous forming device and method

Publications (1)

Publication Number Publication Date
CN112475298A true CN112475298A (en) 2021-03-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011249475.6A Pending CN112475298A (en) 2020-11-10 2020-11-10 Metal powder continuous forming device and method

Country Status (1)

Country Link
CN (1) CN112475298A (en)

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