Metal powder joint polishing mechanism

Abstract

The present invention discloses a metal powder joint polishing mechanism, comprising a frame, wherein the frame is provided with a first ball mill and a second ball mill in the height direction, the right end of the first ball mill is a feeding end, the right end of the second ball mill is a discharging end, a metal powder material ball vibration separator is provided between the left end of the first ball mill and the right end of the second ball mill, a first motor for driving the first ball mill to rotate is provided on the top of the frame, and a second motor for driving the second ball mill to rotate is provided on the bottom of the frame. The metal powder is discharged into the second ball mill through the metal powder material ball vibration separator, and the second ball mill has material balls with a smaller diameter, and then further ball milling can be performed, thereby ensuring that a higher metal powder fineness requirement is achieved without excessive ball milling, that is, under the premise of ensuring uniform metal powder fineness.

Description

Technical Field

[0001] The invention relates to the field of metal powder processing, in particular to a metal powder combined polishing mechanism. Background Art

[0002] Metal powder is a fine particle or flake material obtained by grinding metal. Aluminum powder, in particular, belongs to a broad category of metal powders due to its wide range of uses, high demand, and diverse variety. There are many production processes, including ball milling, atomization, inert gas atomization, and pressurized water atomization. Currently, the most widely used is ball milling, which involves placing steel balls, aluminum chips, and lubricant in a ball mill and using the rolling steel balls to grind the aluminum chips into flake aluminum powder.

[0003] In the prior art, a Chinese invention patent application with publication number "CN106925409A" discloses an aluminum powder production device, which includes a ball mill and other devices. The ball mill is usually loaded with balls as grinding materials, such as steel balls or glass beads. If the fineness of the aluminum powder is required to be high, it needs to be ground multiple times. The prior art usually adopts the method of extending the grinding time, but it is easy to cause uneven fineness, affecting the processing quality of the metal powder. Summary of the Invention

[0004] The purpose of the present invention is to provide a metal powder combined polishing mechanism with the advantage of good grinding effect.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a metal powder combined polishing mechanism, comprising a frame, wherein the frame is provided with a first ball mill and a second ball mill in the height direction, the right end of the first ball mill is the feeding end, the right end of the second ball mill is the discharging end, a metal powder ball vibration separator is provided between the left end of the first ball mill and the right end of the second ball mill, a first motor for driving the first ball mill to rotate is provided on the top of the frame, and a second motor for driving the second ball mill to rotate is provided at the bottom of the frame.

[0006] Preferably, the metal powder ball vibration separator is also arranged at the discharge end of the second ball mill.

[0007] By adopting the above technical solution, the metal powder ball vibrating separator includes a screen body, a rotating motor, a screw, a first screw platform, a second screw platform and a fixed seat. One end of the screen body in the length direction is rotatably connected to the first screw platform, and the fixed seat includes a fixing ring and a connecting ring. The other end of the screen body in the length direction is fixedly connected to the fixing ring. A vibration gap is circumferentially provided between the fixing ring and the connecting ring. The fixing ring and the connecting ring are axially fixedly connected. A feeding groove is circumferentially provided through the screen body. The two ends of the screw are respectively fixedly connected to the first screw platform and the second screw platform. The rotating motor is rotatably connected to the first screw platform. The first screw platform is rotatably connected to the first rotating seat. The rotating motor is rotatably connected to the first rotating seat and the rotation axes of the two are parallel.

[0008] Preferably, the rotating motor rotates. Since the rotating axis between the rotating motor and the first rotating seat is parallel, the two will drive the screen body to vibrate during the rotation process. At the same time, the first screw stage and the second screw stage are fixedly connected only by a screw, so the vibration force will be transmitted to the screen body connected to the second screw stage. There are mixed balls and metal powder in the screen body at the same time. Under the action of the rotation of the screen body itself and external vibration, the metal powder is separated from the balls under the action of the vibration force, and finally detached from the discharge chute. The vibration gap improves the vibration effect, avoids the vibration from being offset, and can separate metal powder and balls with low fineness.

[0009] Preferably, the cross-section of the sieve body is annular, the end of the fixing ring extends to form a positioning ring embedded in the inner wall of the sieve body, the outer wall of the positioning ring abuts the inner wall of the sieve body, and the fixing ring is welded and fixed to the outer wall of the sieve body.

[0010] By adopting the above technical solution, the positioning ring plays the role of connecting the screen body, and the fixed ring is connected to the end of the ball mill where it rotates and discharges the material.

[0011] Preferably, connecting bolts are provided between the fixing ring and the connecting ring, and the connecting bolts extend radially.

[0012] By adopting the above technical solution, the connecting bolt plays a role of axial limitation, restricting the axial movement of the positioning ring, while satisfying the radial vibration between the fixing ring and the connecting ring.

[0013] Preferably, the first screw stage includes a first shell, the first rotating seat includes a first bearing, a first rotating shaft and an eccentric shaft, one end of the eccentric shaft is connected to the motor shaft of the rotating motor, the other end of the eccentric shaft is connected to the first rotating shaft, the first rotating shaft is rotatably connected to the first shell through the first bearing, and the top of the screw is fixedly connected to the first shell.

[0014] By adopting the above technical solution, the motor drives the rotation of the eccentric shaft, thereby causing the electric instrument screw table to vibrate in the height direction. Since the first screw table and the second screw table are fixedly connected by the screw, the vibration of the first screw table and the second screw table in the height direction can be transmitted to the screen body, thereby satisfying the separation of the ball and the metal powder.

[0015] Preferably, the second screw stage includes a second shell and a second rotating seat, the second rotating seat includes a second bearing, a second rotating shaft and an end cover, one end of the second rotating shaft is fixedly connected to the center of the end cover, the second rotating shaft is rotatably connected to the second shell through the second bearing, and the bottom of the screw is fixedly connected to the second shell.

[0016] By adopting the above technical solution, the end cover realizes the sealing of one side of the sieve body, thereby preventing the leakage of metal powder, and at the same time satisfies the synchronous rotation of the sieve body and the second rotating shaft.

[0017] Preferably, tensioning devices are provided on both sides of the screen body, and the tensioning devices fasten the screen body between the second screw platform and the fixing seat.

[0018] By adopting the above technical solution, the relative pressing force is increased on both sides of the screen body, thereby improving the fixing effect of the screen body, preventing the screen body from loosening under vibration, and satisfying radial vibration.

[0019] Preferably, the tensioning device includes a fixing hole, a tension spring and a fixed shaft, the second rotating shaft is arranged through the end cover, the fixing hole is arranged at the end of the second rotating shaft, one end of the tension spring is arranged on the fixing hole, and the other end of the tension spring is arranged on the fixed shaft, the tension spring extends along the length direction of the screen body, and the fixed shaft is arranged on or outside the fixed seat.

[0020] By adopting the above technical solution, the axial fixation of the screen body is reinforced, and at the same time, the second rotating shaft can meet the requirements of tensioning and realize the rotation connection with the second shell.

[0021] Preferably, the first screw stage and the second screw stage outer covers are provided with a cover body.

[0022] By adopting the above technical solution, impurities are prevented from entering the vibration separator.

[0023] In summary, when the fineness requirement of metal powder is high, the metal powder is rotated in the first ball mill for a certain period of time while avoiding over-milling, and then the metal powder that is difficult to ball mill is discharged into the second ball mill through the metal powder ball vibration separator. The second ball mill has balls with smaller diameters, and then further ball milling can be carried out, thereby ensuring that higher metal powder fineness requirements are achieved without over-milling, that is, ensuring the uniformity of metal powder fineness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of an embodiment;

[0025] Figure 2 This is a structural diagram of a metal powder ball vibration separator;

[0026] Figure 3 yes Figure 2 An enlarged schematic diagram of part A is shown;

[0027] Figure 4 yes Figure 2 The enlarged schematic diagram of part B is shown;

[0028] Figure 5 It is a cross-sectional schematic diagram of the screen body;

[0029] In the figure, 1. sieve body; 11. feed port; 12. feed channel; 13. second connecting block; 15. lead screw; 16. first lead screw stage; 17. second lead screw stage; 19. fixing ring; 20. connecting ring; 21. vibration gap; 22. first rotating seat; 23. second rotating seat; 24. positioning ring; 25. connecting bolt; 26. first shell; 261. first bearing; 262. first rotating shaft; 263. eccentric shaft; 27. second shell; 271. second bearing; 272. second rotating shaft; 273. end cover; 28. fixing hole; 29. ​​fixed shaft; 30. first ball mill; 31. second ball mill; 32. first motor; 33. second motor; 34. frame; 35. metal powder ball vibration separator; 36. cover. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

[0032] Example:

[0033] like Figure 1As shown, a metal powder combined polishing mechanism includes a frame 34, and the frame 34 is provided with a first ball mill 30 and a second ball mill 31 in the height direction. The right end of the first ball mill 30 is the feeding end, and the right end of the second ball mill 31 is the discharging end. A metal powder ball vibration separator 35 is provided between the left end of the first ball mill 30 and the right end of the second ball mill 31, and the metal powder ball vibration separator 35 is also provided at the discharging end of the second ball mill 31. A first motor 32 for driving the first ball mill 30 to rotate is provided on the top of the frame 34, and a second motor 33 for driving the second ball mill 31 to rotate is provided at the bottom of the frame 34. The first motor 32 drives the first ball mill 30 to rotate through a synchronous belt surrounding the circumferential side wall of the first ball mill 30, and the second motor 33 drives the second ball mill 31 to rotate through a synchronous belt surrounding the circumferential side wall of the second ball mill 31.

[0034] like Figure 2 As shown, a metal powder ball vibrating separator 35 includes a screen body 1, a rotating motor, a screw 15, a first screw stage 16, a second screw stage 17 and a fixed seat. One end of the screen body 1 in the length direction is rotatably connected to the first screw stage 16, and the fixed seat includes a fixing ring 19 and a connecting ring 20. The other end of the screen body 1 in the length direction is fixedly connected to the fixing ring 19.

[0035] like Figure 2 and Figure 5 As shown, the sieve body 1 is made of tubular metal material and has strong structural strength. One end of the sieve body 1 is a feed port 11, which can be connected to the axial discharge port of the ball mill to realize discharge. At the same time, the other end of the sieve body 1 can be closed by using components. The side of the sieve body 1 is a feed groove 12 for powder to pass through. The width of the feed groove 12 is smaller than the diameter of the ball, and the feed groove 12 is evenly distributed along the length direction of the sieve body 1.

[0036] like Figure 5 As shown, the cross-sectional shape of the sieve body 1 is annular, for example, the outer contour of the ring is circular, elliptical or polygonal; there is at least one feeding channel 12 evenly distributed on the cross-section of the sieve body 1, and there are three feeding channels 12 distributed on the same cross-section, and adjacent feeding channels 12 are rotationally symmetrical on the cross-section of the sieve body 1. At the same time, there is a second connecting block 13 between adjacent feeding channels 12 to ensure strong structural strength and bending resistance.

[0037] like Figure 5As shown, in order to ensure that the balls do not fall off, the diameter of the balls is generally above 4 mm, so the width of the feeding slot 12 is less than 3 mm, and the width of the feeding slot 12 can be adjusted according to the diameter of the balls. At the same time, the interval width of the feeding slot 12 is greater than 3 mm, and the end of the feeding slot 12 is semicircular; during use, the balls enter the sieve body 1 from one side of the sieve body 1, that is, enter the sieve body 1 through the feed port 11, and then the powder in the grinding process between the balls is separated from the balls through the feeding slot 12. At the same time, the structure of the sieve body 1 can accelerate the separation of the powder by vibration and the like, and the size of the feeding slot 12 can be controlled by processing the sieve body 1, such as cutting grooves and the like.

[0038] like Figure 3 As shown, a vibration gap 21 is provided in the circumferential direction of the fixing ring 19 and the connecting ring 20. The fixing ring 19 and the connecting ring 20 are fixedly connected in the axial direction. The end of the fixing ring 19 is extended to form a positioning ring 24 embedded in the inner wall of the sieve body 1. The outer wall of the positioning ring 24 abuts against the inner wall of the sieve body 1. The fixing ring 19 is welded and fixed to the outer wall of the sieve body 1. Figure 1 As shown, connecting bolts 25 are provided between the fixing ring 19 and the connecting ring 20 , and the connecting bolts 25 extend radially, so that the fixing ring 19 and the connecting ring 20 can meet a certain vibration in the radial direction.

[0039] like Figure 2 and Figure 4 As shown, the rotating motor is rotatably connected to the first screw platform 16, and a first rotating seat 22 is rotatably connected inside the first screw platform 16. The rotating motor is rotatably connected to the first rotating seat 22 and the rotation axes of the two are parallel. The first screw platform 16 includes a first housing 26, and the first rotating seat 22 includes a first bearing 261, a first rotating shaft 262 and an eccentric shaft 263. There are two first bearings 261 arranged side by side, one end of the eccentric shaft 263 is connected to the motor shaft of the rotating motor through a keyway, and the other end of the eccentric shaft 263 is connected to the first rotating shaft 262. The first rotating shaft 262 is rotatably connected to the first housing 26 through the first bearing 261.

[0040] like Figure 2 As shown, the second screw stage 17 includes a second shell 27 and a second rotating seat 23. The second rotating seat 23 includes a second bearing 271, a second rotating shaft 272 and an end cover 273. One end of the second rotating shaft 272 is fixedly connected to the center of the end cover 273. The second rotating shaft 272 is rotatably connected to the second shell 27 through the second bearing 271.

[0041] like Figure 2As shown, both ends of the screw 15 are fixedly connected to the first screw platform 16 and the second screw platform 17 respectively, that is, the top of the screw 15 is fixedly connected to the first shell 26, and the bottom of the screw 15 is fixedly connected to the second shell 27; the first screw platform 16 and the second screw platform 17 are both sealed.

[0042] like Figure 1 As shown, the first screw stage 16 and the second screw stage 17 are covered with a cover 36 to prevent dust and other impurities from entering.

[0043] like Figure 2 As shown, tensioning devices are provided on both sides of the screen body 1, which fasten the screen body 1 between the second screw platform 17 and the fixed seat. The tensioning device includes a fixing hole 28, a tension spring and a fixed shaft 29. The second rotating shaft 272 is arranged through the end cover 273. The fixing hole 28 is arranged at the end of the second rotating shaft 272. One end of the tension spring is arranged on the fixing hole 28, and the other end of the tension spring is arranged on the fixed shaft 29. The tension spring extends along the length direction of the screen body 1. The fixed shaft 29 is arranged on or outside the fixed seat. An annular groove that cooperates with the end of the tension spring is provided on the fixed shaft 29, and the annular groove is concentrically arranged with the fixed shaft 29. The rotating motor rotates. Since the rotating axis between the rotating motor and the first rotating seat 22 is parallel, the two will drive the screen body 1 to vibrate during the rotation process. At the same time, the first screw stage 16 and the second screw stage 17 are fixedly connected only by the screw 15. Therefore, the vibration force will be transmitted to the screen body 1 connected to the second screw stage 17. There are mixed balls and metal powder in the screen body 1 at the same time. Under the action of the rotation of the screen body 1 itself and the external vibration, the metal powder is separated from the balls under the action of the vibration force, and finally detached from the discharge groove 12. The vibration gap 21 improves the vibration effect and avoids the vibration being offset. Under this structure, metal powder and balls with lower fineness can be separated.

[0044] Working principle:

[0045] The metal powder rotates in the first ball mill 30 for a certain period of time to avoid over-milling, and then the metal powder that is difficult to ball mill is discharged into the second ball mill 31 through the metal powder ball vibration separator 35. The second ball mill 31 has balls with smaller diameters, and then further ball milling can be carried out, thereby ensuring that higher metal powder fineness requirements are achieved without over-milling, that is, ensuring uniform metal powder fineness.

Claims

1. A metal powder combined polishing mechanism, comprising a frame (34), characterized in that: The frame (34) is provided with a first ball mill (30) and a second ball mill (31) in the height direction; the right end of the first ball mill (30) is a feeding end, and the right end of the second ball mill (31) is a discharging end; a metal powder ball vibrating separator (35) is provided between the left end of the first ball mill (30) and the right end of the second ball mill (31); a first motor (32) for driving the first ball mill (30) to rotate is provided at the top of the frame (34); a second motor (33) for driving the second ball mill (31) to rotate is provided at the bottom of the frame (34); and the metal powder ball vibrating separator (35) is also provided at the bottom of the second ball mill (31). At the discharge end, the metal powder ball vibrating separator (35) comprises a sieve body (1), a rotating motor, a screw (15), a first screw platform (16), a second screw platform (17) and a fixed seat. One end of the sieve body (1) in the length direction is rotatably connected to the first screw platform (16). The fixed seat comprises a fixing ring (19) and a connecting ring (20). The other end of the sieve body (1) in the length direction is fixedly connected to the fixing ring (19). A vibration gap (21) is provided in the circumferential direction of the fixing ring (19) and the connecting ring (20). The fixing ring (19) and the connecting ring (20) are fixedly connected in the axial direction. A material discharge through groove (12) is provided in the circumferential direction of the sieve body (1). The two ends of the lead screw (15) are fixedly connected to the first lead screw platform (16) and the second lead screw platform (17) respectively; the rotating motor is rotatably connected to the first lead screw platform (16); a first rotating seat (22) is rotatably connected inside the first lead screw platform (16); the rotating motor is rotatably connected to the first rotating seat (22) and the rotating axes of the two are parallel; the first lead screw platform (16) comprises a first housing (26); the first rotating seat (22) comprises a first bearing (261), a first rotating shaft (262) and an eccentric shaft (263); one end of the eccentric shaft (263) is connected to the motor shaft of the rotating motor; the other end of the eccentric shaft (263) is connected to the first rotating shaft (262), the first rotating shaft (262) is rotationally connected to the first shell (26) through the first bearing (261), the top of the screw (15) is fixedly connected to the first shell (26), one end of the sieve body is a feed port, the feed port is connected to the axial discharge port of the ball mill to realize discharge, and the other end of the sieve body is closed by a component, the side of the sieve body is a feed feed slot for powder to pass through, the width of the feed feed slot is smaller than the diameter of the ball, and the feed feed slots are evenly distributed along the length direction of the sieve body; at least one feed feed slot is evenly distributed on the cross section of the sieve body, and three feed feed slots are distributed on the same cross section, and adjacent feed feed slots are rotationally symmetrical on the cross section of the sieve body.

2. The metal powder combined polishing mechanism according to claim 1, characterized in that: The cross-sectional shape of the sieve body (1) is annular, and the end of the fixing ring (19) extends to form a positioning ring (24) embedded in the inner wall of the sieve body (1), the outer wall of the positioning ring (24) abuts against the inner wall of the sieve body (1), and the fixing ring (19) is fixed to the outer wall of the sieve body (1) by welding.

3. The metal powder combined polishing mechanism according to claim 1 or 2, characterized in that: Connecting bolts (25) are provided between the fixing ring (19) and the connecting ring (20), and the connecting bolts (25) extend in the radial direction.

4. The metal powder combined polishing mechanism according to claim 1, characterized in that: The second screw platform (17) comprises a second housing (27) and a second rotating seat (23); the second rotating seat (23) comprises a second bearing (271), a second rotating shaft (272) and an end cover (273); one end of the second rotating shaft (272) is fixedly connected to the center of the end cover (273); the second rotating shaft (272) is rotatably connected to the second housing (27) via the second bearing (271); and the bottom of the screw (15) is fixedly connected to the second housing (27).

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