A grinding device for metal printed parts

Abstract

The present invention relates to a polishing device for metal printed parts, comprising: a placing part, which is arranged on an ultrasonic cleaning machine and in which metal sand can be placed; a clamping part, which is arranged in the ultrasonic cleaning machine, and is used to circle the polishing range of the metal printed part, so that the metal sand placed outside and inside the metal printed part is subjected to the action of the ultrasonic cleaning machine within a range, and the metal printed part is chemically polished and physically polished synchronously with a nitric acid solution. The metal sand can act on the surface without acting on the gaps generated by the surfaces. After the physical polishing work is completed, the chemical polishing work is performed to ensure that the metal printed part is absolutely polished and smooth; the clamping part can quickly clamp the metal printed part, and the direction-changing part can control the clamping part to adjust the angle in two directions, so that the metal printed part can be flexibly switched when performing multiple directional polishing operations, thereby improving the comprehensive work efficiency of the polishing work.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printed part processing equipment, and in particular to a grinding device for metal printed parts. Background Art

[0002] Metal 3D printing is a 3D printing technology that uses metal powder to directly print metal parts. Due to the technical characteristics of layer-by-layer accumulation and the characteristics of the raw material state, 3D printing cannot achieve the surface quality of mechanical processing or mold forming. It is difficult to directly apply it in situations where high surface quality requirements are required, and it is difficult to improve the surface quality through traditional methods such as mechanical polishing.

[0003] The existing patent number CN201911209006.9 is a 3D printed surface ultrasonic atomization polishing device, which achieves good polishing effect by applying liquid polishing medium to the inner and outer surfaces of metal printed parts. However, this patent has the following problems:

[0004] 1. The polishing medium is liquid, which can only polish metal printed parts chemically but not physically. Metal printed parts are relatively rough workpieces with uniformly distributed rough surfaces. The polishing effect of liquid media on rough surfaces is equivalent to the polishing effect of forming gaps on the rough surfaces. In this case, it cannot guarantee that the metal printed parts will be absolutely polished and smooth.

[0005] 2. The workpiece to be polished is directly clamped by a fixed clamp, which makes the polishing work less flexible during directional grinding or direction-changing grinding, affecting the overall efficiency of the grinding work. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the technical problem of poor diffusion protection in the metal powder printing process in the prior art and provide a polishing device for metal printed parts.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a grinding device for metal printed parts, comprising:

[0008] A placement portion, the placement portion is provided on the ultrasonic cleaning machine, and metal sand can be placed in the placement portion;

[0009] A clamping portion, the clamping portion is disposed in the ultrasonic cleaning machine and can clamp a metal printed part;

[0010] a direction-changing portion, the direction-changing portion being hinged to the clamping portion and being disposed throughout the ultrasonic cleaning machine, and capable of driving the clamping portion to change direction, so as to change the direction of the metal printed part;

[0011] The ultrasonic cleaning machine is filled with an acidic solution;

[0012] Metal sand can be filled into the inner cavity of metal printed parts.

[0013] By driving the ultrasonic cleaning machine, the acidic solution can drive the metal sand to mix and vibrate in multiple directions to polish the inner and outer walls of the metal printed parts.

[0014] Furthermore, the placement portion includes a hanging basket, a vertical drive mechanism connected to the hanging basket, and a horizontal drive structure connected to the vertical drive mechanism;

[0015] The horizontal driving structure is arranged on the ultrasonic cleaning machine;

[0016] The mesh size of the hanging basket is such that metal sand cannot pass through.

[0017] Furthermore, the direction-changing portion includes a waterproof motor provided outside the ultrasonic cleaning machine, which rotates a support shaft provided on the ultrasonic cleaning machine and connected to an output shaft of the waterproof motor;

[0018] The support shaft is provided with a notch, the notch is hinged to the clamping portion, and the clamping portion can push down against the notch, wherein

[0019] The clamping portion is rotated so that the clamping portion can abut against the notch.

[0020] Furthermore, the metal printed part polishing device further includes a locking portion;

[0021] The locking portion includes an arc rod connected to the clamping portion, a first arc groove provided on the support shaft, a second arc groove provided on the support shaft, an insertion hole vertically connected to the second arc groove, a locking rod inserted in the insertion hole, two springs connected between the locking rod and the support shaft, and a locking groove provided on the arc rod;

[0022] The arc rod, the first arc groove and the second arc groove are concentric, wherein

[0023] By rotating the clamping part, the clamping part can drive the arc rod to penetrate the second arc groove along the first arc groove. When the arc rod pushes the locking rod sideways, the two springs are compressed, so that the two springs drive the locking rod to move in the opposite direction and then penetrate the locking groove.

[0024] Furthermore, the clamping portion includes a disc hingedly arranged on the support shaft, a fixed rod group circumferentially arranged on the disc, a plurality of first bending rods hingedly arranged on the fixed rod group, and a pushing portion arranged on the disc, wherein

[0025] The pushing portion can push up a plurality of the first bending rods to gather and rotate.

[0026] Furthermore, the pushing portion includes a plurality of through grooves circumferentially arranged on the disc, a plurality of second bent rods inserted into the through grooves, a threaded column arranged at the bottom end of the center of the disc, a movable disc spirally connected to the threaded column, and an annular groove arranged on the movable disc;

[0027] The lower ends of the second bending rods are slidably connected to the annular groove, wherein

[0028] The movable disk is spirally rotated, and the annular groove can be spirally raised, so that the plurality of second bending rods push the plurality of first bending rods to gather and rotate.

[0029] Furthermore, the annular groove is in the shape of a step that is narrow at the top and wide at the bottom, and the cross section when viewed from the front is in the shape of an inverted "T";

[0030] The lower end of the second bending rod is in an inverted "T" shape, and the lower end of the second bending rod matches the annular groove.

[0031] Furthermore, the lock slot and one end of the lock rod have the same shape;

[0032] The lower right edge of one end of the locking rod is arc-shaped.

[0033] Furthermore, one side of the second arc groove is a vertical surface.

[0034] The beneficial effects of the present invention are:

[0035] The placement part is used to define the grinding range of the metal print, so that the metal sand placed on the outside and inside of the metal print is in the same range and is subjected to the action of the ultrasonic cleaning machine and the nitric acid solution to simultaneously perform chemical grinding and physical grinding on the metal print. The metal sand can act on the surface without affecting the gaps between the surfaces. After the physical grinding work is completed, the chemical grinding work is carried out to ensure that the metal print is absolutely polished and smooth.

[0036] The clamping part can quickly clamp the metal printed part, and the direction-changing part can adjust the angle of the clamping part in two directions, so that the metal printed part can be flexibly switched during multiple directional grinding operations, thereby improving the overall work efficiency of the grinding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings and examples.

[0038] Figure 1 It is a three-dimensional diagram of a grinding device for metal printed parts of the present invention;

[0039] Figure 2 This is a schematic diagram of the interior of a preferred embodiment of a laser 3D printer of the present invention;

[0040] Figure 3 This is a front view of the preferred embodiment of the clamping portion connected to the direction-changing portion of the present invention;

[0041] Figure 4 is a front cross-sectional view of the locking portion of the present invention;

[0042] Figure 5 is a top view of the movable disk of the present invention;

[0043] Figure 6 It is a partial front sectional view of the pushing portion of the present invention.

[0044] In the picture:

[0045] 1. Placement unit; 11. Hanging basket; 12. Vertical drive mechanism; 13. Horizontal drive structure;

[0046] 2. Ultrasonic cleaning machine;

[0047] 3. Clamping portion; 31. Disc; 32. Fixed rod assembly; 33. First bending rod;

[0048] 34. Pushing portion; 341. Through groove; 342. Second bending rod; 343. Threaded column; 344. Movable disk; 345. Annular groove;

[0049] 4. Direction-changing portion; 41. Waterproof motor; 42. Support shaft; 43. Notch;

[0050] 5. Locking part; 51. Arc rod; 52. First arc groove; 53. Second arc groove; 54. Insertion hole; 55. Locking rod; 56. Spring; 57. Locking groove. DETAILED DESCRIPTION

[0051] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0052] like Figure 1 As shown, Figure 1 1 is a perspective view of a grinding device for metal printed parts according to the present invention; Figure 2 As shown, Figure 2 1 is a schematic diagram of the interior of a preferred embodiment of a laser 3D printer of the present invention; Figure 1-2 As shown, the present invention provides a grinding device for metal printed parts, comprising:

[0053] A placement portion 1, which is disposed on an ultrasonic cleaning machine 2 and can hold metal sand, wherein the particle size of the metal sand is larger than the size of the surface gap of the metal printed part;

[0054] A clamping portion 3, wherein the clamping portion 3 is disposed in the ultrasonic cleaning machine 2 and can clamp a metal printed part;

[0055] a direction-changing portion 4 , wherein the direction-changing portion 4 is hinged to the clamping portion 3 and is disposed throughout the ultrasonic cleaning machine 2 , and the direction-changing portion 4 can drive the clamping portion 3 to change direction, so as to change the direction of the metal printed part;

[0056] The ultrasonic cleaning machine 2 is filled with an acidic solution, which may be a nitric acid solution;

[0057] Metal sand can be filled into the inner cavity of metal printed parts.

[0058] By driving the ultrasonic cleaning machine 2, the acidic solution can drive the metal sand to mix and vibrate in multiple directions to polish the inner and outer walls of the metal print. Specifically,

[0059] The placement part 1 is used to define the grinding range of the metal printed part, so that the metal sand placed on the outside and inside of the metal printed part is subjected to the action of the ultrasonic cleaning machine 2 and the nitric acid solution to simultaneously perform chemical grinding and physical grinding on the metal printed part. The metal sand can act on the surface without affecting the gaps between the surfaces. After the physical grinding work is completed, the chemical grinding work is carried out to ensure that the metal printed part is absolutely polished and smooth.

[0060] The clamping part 3 can quickly clamp the metal printed part, and the changing part 4 can adjust the angle of the clamping part 3 in two directions, so that the metal printed part can be flexibly switched during multiple directional grinding operations, thereby improving the overall work efficiency of the grinding work.

[0061] Optionally, the placement portion 1 includes a hanging basket 11, a vertical drive mechanism 12 connected to the hanging basket 11, and a horizontal drive structure 13 connected to the vertical drive mechanism 12;

[0062] The horizontal driving structure 13 is arranged on the ultrasonic cleaning machine 2;

[0063] The mesh size of the hanging basket 11 is a size that metal sand cannot pass through. Specifically, after the hanging basket 11 sinks into the ultrasonic cleaning machine 2, and the upper end surface is parallel to the upper end surface of the ultrasonic cleaning machine 2, the liquid level of the acidic solution is lower than the upper end surface of the hanging basket 11, thereby preventing the metal sand and acidic solution in the hanging basket 11 from overflowing during operation. The vertical drive mechanism 12 and the horizontal drive structure 13 are conventional mechanisms in the prior art and are not limited here. They can be a screw or chain drive structure. The vertical drive mechanism 12 can drive the hanging basket 11 to rise and fall, making it convenient for the hanging basket 11 to enter or move away from the ultrasonic cleaning machine 2. The horizontal drive structure 13 can drive the hanging basket 11 to move left and right through the vertical drive mechanism 12, making it convenient for the acidic solution to be filtered out by the swinging force.

[0064] Optionally, the direction-changing portion 4 includes a waterproof motor 41 disposed outside the ultrasonic cleaning machine 2 , which rotates a support shaft 42 that is disposed on the ultrasonic cleaning machine 2 and connected to an output shaft of the waterproof motor 41 ;

[0065] The support shaft 42 is provided with a notch 43, the notch 43 is hinged to the clamping portion 3, and the clamping portion 3 can press down against the notch 43, wherein

[0066] By rotating the clamping part 3, the clamping part 3 can be against the notch 43. Specifically, the waterproof motor 41 can be a stepping motor, which can drive the support shaft 42 to drive the clamping part 3 to adjust the angle in the horizontal direction and fix it at this angle, so that the metal print can be polished in the horizontal direction. The notch 43 can support and position the clamping part 3 in the hinged state, so that the clamping part 3 remains horizontal with the support shaft 42 under normal conditions. After the clamping part 3 is rotated to press against the notch 43, the metal print is changed by ninety degrees, so that the metal print can be polished in the vertical direction. The rotation angle of the clamping part 3 is limited by the notch 43.

[0067] like Figure 3 As shown, Figure 3 1 is a front view of the preferred embodiment of the clamping portion connected to the direction-changing portion of the present invention; Figure 3 As shown, Figure 4 As shown, Figure 4 : is a front cross-sectional view of the locking portion of the present invention; Figure 3-4 As shown,

[0068] The metal printed part polishing device further includes a locking portion 5;

[0069] The locking portion 5 includes an arc rod 51 connected to the clamping portion 3, a first arc groove 52 provided on the support shaft 42, a second arc groove 53 provided on the support shaft 42, an insertion hole 54 perpendicularly connected to the second arc groove 53, a locking rod 55 inserted into the insertion hole 54, two springs 56 connected between the locking rod 55 and the support shaft 42, and a locking groove 57 provided on the arc rod 51;

[0070] The arc rod 51, the first arc groove 52 and the second arc groove 53 are cocentric, and the arc rod 51 is also cocentric with the hinge axis of the clamping part 3.

[0071] By rotating the clamping portion 3, the clamping portion 3 can drive the arc rod 51 to penetrate the second arc groove 53 along the first arc groove 52. When the arc rod 51 pushes the locking rod 55 sideways, the two springs 56 are compressed, so that the two springs 56 drive the locking rod 55 to move in the opposite direction and then penetrate the locking groove 57. Specifically, the arc rod 51 is a circular ring larger than three-quarters, one end of which is connected to the clamping portion 3. The first arc groove 52 can limit the rotation trajectory of the arc rod 51, so that the rotation process of the arc rod 51 can be carried out stably in an unobstructed state. Then, the other end of the arc rod 51 will be inserted into the second arc groove 57. The arc groove 53 touches the locking rod 55, wherein the insertion hole 54 limits the activity state of the locking rod 55, so that the locking rod 5 can only perform radial movement in the horizontal direction, and cannot swing up and down or left and right during the process. The initial position of the locking rod 55 is based on the positioning effect of the two springs 56. The friction pushing state of the locking rod 55 by the arc rod 51 causes the two springs 56 to compress and store energy. When the locking rod 55 and the locking groove 57 are in the same position, the two springs 56 release the energy storage and allow the locking rod 55 to move in the opposite direction and insert the locking groove 57 to lock the clamping part 3 to maintain the angle adjustment state in the vertical direction.

[0072] like Figure 5 As shown, Figure 5 Is a top view of the movable disk of the present invention; Figure 6 As shown, Figure 6 This is a partial front cross-sectional view of the push portion of the present invention, please refer to Figures 5-6.

[0073] Optionally, the clamping portion 3 includes a disc 31 hingedly arranged on the support shaft 42, a fixed rod group 32 circumferentially arranged on the disc 31, a plurality of first bending rods 33 hingedly arranged on the fixed rod group 32, and a pushing portion 34 arranged on the disc 31, wherein

[0074] The pushing portion 34 can push up the first bending rods 33 to gather and rotate. Specifically, the upper half of the first bending rods 33 is a vertical section, and the lower half is an inwardly inclined section from top to bottom. The metal print can be placed inside the first bending rods 33. When the pushing portion 34 pushes up the first bending rods 33, the levers of the first bending rods 33 rotate, so that their vertical sections are tilted inward and the starting opening spacing is reduced. The metal print is thereby subjected to uniform clamping forces at multiple angles and remains stable. In addition, the clamping space of the first bending rods 33 can be adjusted according to the rotation amplitude, and can adapt to the clamping work of metal prints of multiple different standards.

[0075] Optionally, the pushing portion 34 includes a plurality of through grooves 341 circumferentially arranged on the disc 31, a plurality of second bent rods 342 inserted into the through grooves 341, a threaded column 343 arranged at the center bottom end of the disc 31, a movable disc 344 screwedly connected to the threaded column 343, and an annular groove 345 arranged on the movable disc 344;

[0076] The lower ends of the second bending rods 342 are slidably connected to the annular groove 345, wherein

[0077] The movable disk 344 is spirally rotated, and the annular groove 345 can spirally rise, so that the plurality of second bending rods 342 push the plurality of first bending rods 33 to gather and rotate. Specifically,

[0078] The upper half of the plurality of second bending rods 342 is an inwardly inclined inclined rod section, and the lower half is a vertical segment. The plurality of through grooves 341 coincide with the vertical segments of the plurality of second bending rods 342. The stress-free state of the plurality of second bending rods 342 will also be affected by the angle between the straight rod section and the inclined section and positioned on the disc 31. A threaded hole matching the threaded column 343 is provided at the center of the movable disc 344. The movable disc 344 can drive the annular groove 345 to rise by spiral rotation. The annular groove 345 rises and rotates to push up the plurality of second bending rods 342, so that the plurality of first bending rods 33 are subjected to corresponding force activities. Due to the existence of the annular groove 345 and the limiting effect of the through groove 341 on the second bending rod 342, the angle of the plurality of second bending rods 342 will not change during the rotation of the movable disc 344, so that the side contact state with the plurality of first bending rods 33 can be continuously maintained.

[0079] Optionally, the annular groove 345 is in a stepped shape that is narrow at the top and wide at the bottom, and has an inverted "T" shape in a front view cross section;

[0080] The lower end of the second bending rod 342 is an inverted "T" shape, and the lower end of the second bending rod 342 matches the annular groove 345. Specifically, the surface of the second bending rod 342 and the surface of the annular groove 345 can contact each other at multiple angles and in multiple directions, so that the rotation state of the annular groove 345 is balanced, and the stability of the connection between the annular groove 345 and the second bending rod 342 is guaranteed, and the second bending rod 342 cannot be detached from the annular groove 345 by pulling, so that its use effect is better. The movable disk 344 can be set to be split up and down, which is conducive to the construction of the annular groove 345 and the installation of the second bending rod 342.

[0081] Optionally, the locking slot 57 and one end of the locking rod 55 have the same shape;

[0082] The lower right edge of one end of the locking rod 55 is arc-shaped. Specifically, the locking rod 55 and the locking groove 57 are connected based on the counterclockwise rotation process of the arc rod 51. The arc-shaped edge of the locking rod 55 can reduce the friction force of the arc rod 51, which can play a transitional role in the position change process. The other place where the locking rod 55 and the locking groove 57 are fitted is a standard yin and yang angle. When the locking rod 55 is ready to rotate counterclockwise, it will be restricted, so that the locking state of this structure is firm and cannot be released in the same way.

[0083] Optionally, one side of the second arc groove 53 is a vertical surface. Specifically, its setting increases the space of the second arc groove 53, and the space becomes wide at the top and narrow at the bottom. At this time, the space of the second arc groove 53 can be used to perform auxiliary operations when the locking rod 55 fails, or the locking state of the arc rod 51 can be directly released by directly pulling the locking rod 55 horizontally, so that the operation of the locking rod 55 is diverse.

[0084] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A grinding device for metal printed parts, characterized in that: include: A placement portion (1), the placement portion (1) being arranged on the ultrasonic cleaning machine (2), and metal sand being capable of being placed in the placement portion (1); A clamping portion (3), the clamping portion (3) being arranged in the ultrasonic cleaning machine (2), and the clamping portion (3) being capable of clamping a metal printed part; a direction-changing portion (4), the direction-changing portion (4) being hinged to the clamping portion (3), and the direction-changing portion (4) being disposed throughout the ultrasonic cleaning machine (2), and the direction-changing portion (4) being capable of driving the clamping portion (3) to change direction, thereby changing the direction of the metal printed part; The ultrasonic cleaning machine (2) is filled with an acidic solution; Metal sand can be filled into the inner cavity of metal printed parts. The ultrasonic cleaning machine (2) is driven, and the acidic solution can drive the metal sand to mix and vibrate in multiple directions to polish the inner and outer walls of the metal printed part; The direction-changing portion (4) includes a waterproof motor (41) arranged outside the ultrasonic cleaning machine (2), and a support shaft (42) that is arranged on the ultrasonic cleaning machine (2) and connected to the output shaft of the waterproof motor (41). The support shaft (42) is provided with a notch (43), the notch (43) is hinged to the clamping portion (3), and the clamping portion (3) can press down against the notch (43), wherein The clamping portion (3) is rotated so that the clamping portion (3) can abut against the notch (43); The metal printed part polishing device further includes a locking portion (5); The locking portion (5) comprises an arc rod (51) connected to the clamping portion (3), a first arc groove (52) provided on the support shaft (42), a second arc groove (53) provided on the support shaft (42), an insertion hole (54) vertically connected to the second arc groove (53), a locking rod (55) inserted in the insertion hole (54), two springs (56) connected between the locking rod (55) and the support shaft (42), and a locking groove (57) provided on the arc rod (51); The arc rod (51), the first arc groove (52) and the second arc groove (53) are co-centered, wherein By rotating the clamping portion (3), the clamping portion (3) can drive the arc rod (51) to penetrate the second arc groove (53) along the first arc groove (52), and the arc rod (51) compresses the two springs (56) when pushing the locking rod (55) sideways, so that the two springs (56) drive the locking rod (55) to move in the reverse direction and then penetrate the locking groove (57).

2. A grinding device for metal printed parts according to claim 1, characterized in that: The placement portion (1) comprises a hanging basket (11), a vertical drive mechanism (12) connected to the hanging basket (11), and a horizontal drive structure (13) connected to the vertical drive mechanism (12); The horizontal driving structure (13) is arranged on the ultrasonic cleaning machine (2); The mesh size of the hanging basket (11) is such that metal sand cannot pass through.

3. A grinding device for metal printed parts according to claim 2, characterized in that: The clamping portion (3) comprises a disc (31) hingedly arranged on the support shaft (42), a fixed rod group (32) circumferentially arranged on the disc (31), a plurality of first bending rods (33) hingedly arranged on the fixed rod group (32), and a pushing portion (34) arranged on the disc (31), wherein The pushing portion (34) is capable of pushing up a plurality of the first bending rods (33) to gather and rotate.

4. A grinding device for metal printed parts according to claim 3, characterized in that: The pushing portion (34) includes a plurality of through grooves (341) circumferentially arranged on the disc (31), a plurality of second bending rods (342) inserted into the through grooves (341), a threaded column (343) arranged at the bottom end of the center of the disc (31), a movable disc (344) spirally connected to the threaded column (343), and an annular groove (345) arranged on the movable disc (344); The lower ends of the second bending rods (342) are slidably connected to the annular groove (345), wherein The movable disk (344) is spirally rotated, and the annular groove (345) can be spirally raised, so that the plurality of second bending rods (342) push the plurality of first bending rods (33) to gather and rotate.

5. A grinding device for metal printed parts according to claim 4, characterized in that: The annular groove (345) is in the shape of a step that is narrow at the top and wide at the bottom, and has an inverted "T" shape in the front view cross section; The lower end of the second bending rod (342) is in an inverted "T" shape, and the lower end of the second bending rod (342) matches the annular groove (345).

6. A grinding device for metal printed parts according to claim 5, characterized in that: The locking groove (57) and one end of the locking rod (55) are of the same shape; The lower right edge of one end of the locking rod (55) is arc-shaped.

7. A grinding device for metal printed parts according to claim 6, characterized in that: One side of the second arc groove (53) is a vertical surface.

Images