CN112719300A

CN112719300A - Base shaft type SLM metal printer

Info

Publication number: CN112719300A
Application number: CN202011457147.5A
Authority: CN
Inventors: 韩品连
Original assignee: Zhejiang Yidong Technology Co Ltd
Current assignee: Jiaxing Yidong Energy Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-04-30
Anticipated expiration: 2040-12-10
Also published as: CN112719300B

Abstract

The invention discloses a base shaft type SLM metal printer, which comprises a printer body and a metering powder feeding device, wherein the metering powder feeding device is arranged on the printer body; the printer body comprises a frame; the middle part of the frame is provided with a powder cylinder; the powder cylinder is cylindrical, and the extension direction of the powder cylinder is parallel to the horizontal plane; a base shaft driving device is arranged in the powder cylinder; the base shaft driving device is used for driving the base shaft to rotate and/or move up and down; the powder cylinder is provided with a strip-shaped opening, the two sides of the strip-shaped opening are both connected with crack clamping sheets, and a gap is formed between the two crack clamping sheets; a powder scraping roller is arranged on one side below the gap; the powder cylinder is also internally provided with a powder supplementing mechanism. The base shaft type SLM metal printer is simple in structure and convenient to use, complex components such as a powder spreading device and a powder scraping device are omitted, the requirements of processing symmetry and the like of rotating parts are well met, the quality of printed and processed products is guaranteed, and the temperature stress of a workpiece during printing is controlled; automatic feeding is realized, and printing efficiency is improved.

Description

Base shaft type SLM metal printer

Technical Field

The invention relates to the technical field of SLM printing equipment, in particular to a base shaft type SLM metal printer.

Background

SLM, Selective laser melting, is a more industrial method of 3D printing, moving a roller to push metal particles across a printing area, then powerful laser will track the current layer of the object to be printed, selectively fuse parts of the particles together according to the designed model, once the current layer is completed, the roller moves back and forth again, bringing a new layer of metal particles, which are actually completely fused when using SLM, and they fuse together more firmly, forming an extremely strong object, which can also be printed as a whole, without the need to assemble different parts, which further reduces the possibility of faults or errors during assembly, based on the benefits of this design method, they are used in industries with very low tolerance, such as aerospace, mainly for 3D printing parts of small aero engines, mostly be rotary part, can shorten the research and development cycle that novel aerospace was equipped, optimize the part structure, weight reduction reduces stress concentration, increases life, also can be used for the restoration of part to take shape to and cooperate with traditional manufacturing technology, the intercommunication is complementary.

2019.01.18, which is a patent with publication number CN109226762A and named as a metal 3D printing device, the patent discloses a metal 3D printing device, which comprises a working cabin, a processing table, a powder spreading system, a sintering system and a gas circulation system, wherein the powder spreading system comprises a powder spreading head and a powder supplementing mechanism, the powder spreading head comprises a shell, a vibrating motor, a screen and a power mechanism, a track is arranged on the processing table, a starting point and a terminal point are arranged on the track, a storage space is arranged in the shell, a powder supplementing port and a powder outlet arranged downwards are arranged on the shell, when the shell is positioned at the starting point, the powder supplementing mechanism conveys powder into the storage space through the powder supplementing port, an opening and closing device is arranged on the powder outlet, the opening and closing device comprises an opening and closing motor, a baffle and a transmission mechanism, the opening and closing motor is fixed on the shell, the baffle is arranged on the shell in a sliding manner, the transmission mechanism is connected with the, so as to drive the baffle plate to move when the on-off motor rotates, thereby closing or opening the powder outlet. The metal powder is conveyed and laid for multiple times, so that the amount of the metal powder transported in a single time is reduced, the energy required for transporting the metal powder is reduced, and the energy is saved.

Chinese application patent No.: the invention discloses a powder feeding device of a metal 3D printer, which comprises a powder storage box, a baffle plate, a discharge hole, a first connecting rod, a second connecting rod, a transmission shaft and a servo motor, wherein the discharge hole is formed in the lower part of the powder storage box, the baffle plate is arranged in an inner cavity arranged in the powder storage box, the first connecting rod is fixedly connected to the upper part of the baffle plate, the second connecting rod is fixedly connected to the upper part of the first connecting rod, the second connecting rod is fixedly connected with the transmission shaft through a connecting plate, the transmission shaft is fixedly connected with the outer wall of the powder storage box through a bearing seat, a driven wheel is fixedly connected to the transmission shaft, and the driven wheel is meshed with a driving wheel on an output.

However, the SLM metal printer used at present has the following problems:

1. complex mechanism parts such as a powder spreading device, a powder scraping device and the like need to be arranged;

2. the requirements of symmetrical processing of some rotating parts and the like cannot be met;

3. the quality of printed products cannot be guaranteed, the temperature stress of a workpiece during printing is not controlled, and the defects of stress concentration and the like are easily caused.

4. The base shaft driving device for the partial base shaft type SLM metal printer is simple in structure, cannot rotate and move up and down of the base shaft, further cannot meet more requirements in actual use, is poor in product experience, and needs to be improved in practicability. In view of the above, the present invention is to provide a base shaft driving device for a base shaft SLM metal printer, which can effectively solve the above problems.

5. Most of the existing metering powder feeding devices are single in powder feeding, manual adding is needed, and when workers cannot add the powder in time, the using effect is easily influenced, the normal printing efficiency is delayed, and unnecessary loss is caused; and the amount of the powder fed is generally single and cannot be adjusted according to the amount of the powder actually used, so that powder is easily wasted, and unnecessary loss is caused.

Based on the situation, the invention provides a basic shaft type SLM metal printer which can effectively solve the problems.

Disclosure of Invention

The invention aims to provide a basic shaft type SLM metal printer. The base shaft type SLM metal printer is simple in structure and convenient to use, complex components such as a powder spreading device and a powder scraping device are omitted, on the existing mature SLM principle, a long-strip-shaped base shaft is used as a printing base, a workpiece is formed from inside to outside, each layer is on the same radius, laser scanning is selectively carried out only in the axial direction, the workpiece rotates by an angle corresponding to the width of one line after printing one line at the same radius, a slice is sunk by the thickness after the whole circle printing at the same radius is completed, and the process is continuously repeated to complete the manufacturing of the whole workpiece; the requirements of symmetrical processing and the like of some rotating parts are well met, the quality of printed and processed products is ensured, and the temperature stress of a workpiece during printing is controlled; in addition, automatic feeding is realized, printing efficiency is improved, and labor intensity is reduced.

The invention is realized by the following technical scheme:

a base shaft type SLM metal printer comprises a printer body and a metering powder feeding device;

the powder inlet of the metering powder feeding device is communicated with a powder supplementing mechanism of the printer body through a powder feeding pipe;

the printer body comprises a frame;

the middle part of the frame is provided with a powder cylinder;

the powder cylinder is cylindrical, and the extension direction of the powder cylinder is parallel to the horizontal plane;

a base shaft driving device is arranged in the powder cylinder;

the mounting plates on the two sides of the base shaft driving device are respectively detachably and fixedly connected with the lower surface of the inner side of the powder cylinder;

the base shaft driving device is used for driving the base shaft to rotate and/or move up and down;

the extending direction of the base shaft is the same as that of the powder cylinder;

the powder cylinder is correspondingly provided with a strip-shaped opening at the position above the base shaft, the two sides of the extending direction of the strip-shaped opening are both connected with slit clamping pieces, and a slit is formed between the two slit clamping pieces;

a laser is arranged at the top of the rack and right above the gap;

a powder scraping roller is arranged on one side below the gap and is detachably and fixedly connected with the inner side wall of the powder cylinder;

and a powder supplementing mechanism used for supplementing metal powder between the base shaft and the powder scraping roller is also arranged in the powder cylinder.

Further: the base shaft driving device comprises two mounting plates, wherein the bottoms of the two mounting plates are fixedly provided with a shell, the inside of one of the shell is fixedly provided with a first worm and two first guide rods, the outer surfaces of the two first guide rods are sleeved with convex blocks, a second worm is rotatably arranged between the two convex blocks, the side wall of one of the convex blocks is fixedly provided with a bottom plate, the top of the bottom plate is fixedly provided with a motor, the inside of the other of the shell is fixedly provided with a second guide rod, the outer surface of the second guide rod is sleeved with a movable block, the side wall of the movable block is rotatably provided with a support rod through a bearing, the outer surfaces of the second worm and the support rod are sleeved with sleeve blocks, the opposite sides of the second worm and the support rod are provided with placing grooves, and the inside of the placing grooves is provided with a limiting component, a base shaft is arranged between the two limiting assemblies.

Further: the metering powder feeding device comprises a fixed box, a groove is formed in the fixed box, a driving motor is fixedly connected to the side face of the fixed box, the driving motor penetrates through one end of the fixed box and is fixedly connected with a fixed threaded rod, the surface of the fixed threaded rod is rotatably connected with a movable seat through threads, the surface of the movable seat is fixedly connected with a movable frame, the side face of the movable frame is fixedly connected with a transport box, the top of the transport box is fixedly connected with a powder adding opening, the top of the fixed box is fixedly connected with a powder storage box, a chute is formed in the powder storage box, the bottom of the powder storage box is fixedly connected with a powder storage outlet, the bottom of the transport box is fixedly connected with a fixed opening, the bottom of the fixed box is fixedly connected with a powder supplementing box, the top of the powder supplementing box is fixedly connected with a powder supplementing inlet, and the side, the side fixedly connected with sliding seat of transportation box, the inside sliding connection of sliding seat has the dead lever, the one end fixed connection of dead lever is on the fixed slot, the fixed slot is seted up on fixed case, the side fixedly connected with mount pad of fixed case.

Further: the inside sliding connection of spout has the sliding closure, the pull groove has been seted up to the inside of sliding closure.

Further: the inside of storing up the powder box rotates through the bearing and is connected with accuse volume leaf, the top fixedly connected with crank of accuse volume leaf, accuse volume leaf is located the top of storing up the powder export.

Further: the inside fixedly connected with filter of transport case, the filtration hole has been seted up to the inside of filter.

Further: the surface of the driving motor is fixedly connected with a motor frame, and the side face of the motor frame is fixedly connected to the fixing box.

Further: the quantity of mount pad is two, the mounting groove has been seted up to the inside of mount pad.

Further: and a heater for heating the powder cylinder is arranged outside the powder cylinder.

Further: the second worm is in transmission connection with the first worm, and the second worm is fixedly connected with an output shaft of the motor.

Further: the improved plastic casing comprises a casing body, wherein a sliding groove is formed in one side, opposite to the casing body, of the casing body, guide grooves are symmetrically formed in the inside of the casing body, the guide grooves are communicated with the sliding groove in a corresponding mode, an elastic film is clamped between the guide grooves, one end of the elastic film is fixedly connected with the groove wall of the sliding groove, and the other end of the elastic film is fixedly connected with the surface of a sleeve block.

Further: two the surface of mounting panel all runs through and has seted up the spacing hole of a plurality of.

Further: the both sides lateral wall of base shaft has all seted up square groove, spacing subassembly corresponds the joint through square groove and base shaft.

Further: the limiting assembly comprises a separation blade, a rectangular clamping block is fixedly mounted on one side of the separation blade, and a plurality of springs are fixedly mounted on the other side of the separation blade.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the base shaft type SLM metal printer is simple in structure and convenient to use, complex components such as a powder spreading device and a powder scraping device are omitted, on the existing mature SLM principle, a long-strip-shaped base shaft is used as a printing base, a workpiece is formed from inside to outside, each layer is on the same radius, laser scanning is selectively carried out only in the axial direction, the workpiece rotates by an angle corresponding to the width of one line after printing one line at the same radius, a slice is sunk by the thickness after the whole circle printing at the same radius is completed, and the process is continuously repeated to complete the manufacturing of the whole workpiece; the requirements of symmetrical processing and the like of some rotating parts are well met, the quality of printed and processed products is ensured, and the temperature stress of a workpiece during printing is controlled; in addition, automatic feeding is realized, printing efficiency is improved, and labor intensity is reduced.

When in printing, the powder cylinder is filled (or at least is filled to be more than 1/3 of the diameter of the base shaft), and the base shaft rotates and sinks in the metal powder in the process of 'growing' forming of a rotating piece (workpiece); in the process of forming the 'growth' of the workpiece, an axial line and a line are spliced into an arc surface along an arc, however, the 'line' has no width and is actually spliced by a narrow surface, the width of the narrow surface is the diameter of an SLM molten pool, and the arc surface is actually generated by splicing the arc by polygons;

because of the flowability of the powder, the powder will automatically fill the voids that appear as a result of solidification during the sinking of the base shaft. As the base shaft is rotating, it will also agitate the powder in the powder jar, helping to fill the void.

Because the growing structure is surrounded by metal powder, the temperature field of the structure can be kept controlled by heating the powder cylinder, so that the related temperature stress is controlled.

According to the base shaft driving device, the first worm, the second worm, the convex block, the first guide rod and the like are matched, so that the base shaft is rapidly rotated and vertically reciprocates, the base shaft can be better matched with printing and processing, and more requirements in actual use are met.

1. Compared with the prior art, through the cooperation between first worm, second worm, convex block and the first guide bar etc. both realized the fast rotation of basic shaft, also realized the up-and-down reciprocating motion of basic shaft, and then processing is printed in cooperation that can be better, has satisfied more demands in the in-service use, and the practicality is higher.

2. Compared with the prior art, through the cooperation between standing groove, spacing subassembly and square groove etc, realized the quick installation and the dismantlement of basic axle, and then for the maintenance and the change of later stage basic axle provide very big facility, easy operation labour saving and time saving simultaneously, the experience of product is felt better, and the suitability is stronger.

According to the metering powder feeding device, due to the arrangement of the transport box, the fixed threaded rod and the driving motor, when the metal powder is used, the metal powder is added conveniently by workers, so that the problem that the metal powder cannot be added in time due to manual adding in the prior art is solved, the use effect is easily influenced, the normal printing efficiency is delayed, and unnecessary loss is caused.

1. This measurement send whitewashed device through transport box, fixed threaded rod and driving motor, when the metal powder use finishes, makes things convenient for the staff to add to avoid because traditional artificial interpolation, unable timely interpolation that adds, thereby influence the result of use easily, delay normal printing efficiency, cause the unnecessary loss.

2. This measurement powder feeding device, through accuse volume leaf and crank, make things convenient for the staff to control the volume of advancing of metal powder, produce the unnecessary waste when avoiding using, cause the unnecessary loss.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the printer body according to the present invention (with the workpiece omitted);

FIG. 3 is an enlarged view of a portion of the present invention at C in FIG. 2 (workpiece omitted);

FIG. 4 is a schematic cross-sectional view taken at H-H in FIG. 2 (workpiece not shown) according to the present invention;

FIG. 5 is a schematic view showing the overall structure of the base shaft driving apparatus according to the present invention;

FIG. 6 is a top view of the slide groove, guide groove and elastic membrane of the base shaft driving device of the present invention;

fig. 7 is a schematic structural view of a limiting assembly of the base shaft driving device of the present invention.

FIG. 8 is a schematic structural view of the metering powder feeder of the present invention;

FIG. 9 is a sectional top view of the powder metering device of the present invention;

FIG. 10 is a side sectional view of the powder metering device of the present invention;

FIG. 11 is a bottom sectional view of the powder metering device of the present invention;

in the figure: 4141. a workpiece; 5. a frame; 400. a base shaft drive device; 7. a powder jar; 8. a seam-clamping sheet; 81. A gap; 6. a laser; (ii) a 61. A laser scanning range; (ii) a 9. A powder scraping roller; 10. a powder supplementing mechanism; 82. A strip-shaped opening; 03. a metering powder feeding device; 3. a powder feeding pipe; 100. a printer body;

41. mounting a plate; 42. a housing; 43. a first worm; 44. a first guide bar; 45. a convex block; 46. A second worm; 47. a base plate; 48. a motor; 49. a second guide bar; 410. a moving block; 411. a strut; 412. sleeving blocks; 413. an elastic film; 414. a base shaft; 415. a chute; 416. a limiting hole; 417. a placement groove; 418. a limiting component; 419. a square groove; 420. a guide groove; 41801. a baffle plate; 41802. a rectangular fixture block; 41803. a spring.

31. A fixed box; 32. a groove; 33. a drive motor; 34. fixing a threaded rod; 35. a movable seat; 36. A movable frame; 37. a transport box; 38. adding powder; 39. storing the powder box; 310. a chute; 311. a sliding cover; 312. groove drawing; 313. controlling the quantity of leaves; 314. a crank; 315. a powder storage outlet; 316. a filter plate; 317. a filtration pore; 318. a fixed port; 319. powder supplementing box; 320. a powder supplement inlet; 321. a powder inlet; 322. a sliding seat; 323. fixing the rod; 324. fixing grooves; 325. a motor frame; 326. a mounting seat; 327. and (4) mounting the groove.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Example 1:

as shown in fig. 1 to 11, a base shaft type SLM metal printer includes a printer body and a metering powder feeding device;

the printer body comprises a frame;

the middle part of the frame is provided with a powder cylinder;

a base shaft driving device is arranged in the powder cylinder;

a laser is arranged at the top of the rack and right above the gap;

Example 2:

the printer body comprises a frame;

the middle part of the frame is provided with a powder cylinder;

the powder cylinder is cylindrical, preferably cylindrical, and the extending direction (axial direction) of the powder cylinder is parallel to the horizontal plane;

a base shaft driving device is arranged in the powder cylinder;

the base shaft serves as a printing base, and printing is performed on the surface of the base shaft to obtain a rotating workpiece.

a laser is arranged at the top of the rack and right above the gap;

And a heater for heating the powder cylinder is arranged outside the powder cylinder.

As shown in fig. 5-7, the base shaft driving device of the present invention includes two mounting plates, wherein the bottoms of the two mounting plates are fixedly mounted with a housing, a first worm and two first guide rods are fixedly mounted in one of the housings, the outer surfaces of the two first guide rods are respectively sleeved with a convex block, a second worm is rotatably mounted between the two convex blocks, the second worm is fixedly connected with an output shaft of a motor, the second worm is in transmission connection with the first worm, the side wall of one of the convex blocks is fixedly mounted with a bottom plate, the top of the bottom plate is fixedly mounted with a motor, the inner surface of the other housing is fixedly mounted with a second guide rod, the outer surface of the second guide rod is sleeved with a moving block, the side wall of the moving block is rotatably mounted with a support rod through a bearing, the outer surfaces of the second worm and the support rod are respectively sleeved with a sleeve block, and, the inside of standing groove is provided with spacing subassembly, is provided with the basic shaft between two spacing subassemblies. Wherein, the motor has the function of positive and negative rotation; the starting motor drives the second worm and the base shaft to start rotating under the matching of the second worm, the supporting rod, the placing groove, the limiting assembly and the like, and further realizes the up-and-down reciprocating movement of the motor, the second worm and the base shaft under the matching of the first worm, the first guide rod, the convex block, the bottom plate and the like, so that the matching can be better, the printing and processing are realized, and more requirements in actual use are met.

The concrete, the spout has all been seted up to the relative one side of two casings, and the guide way has been seted up to the inside symmetry of casing, and two guide ways all correspond the switch-on with the spout, and the joint has the elastic membrane between two guide ways, the one end of elastic membrane and the cell wall fixed connection of spout, the other end of elastic membrane and the fixed surface of nested piece are connected. When the second worm moves, the sleeve block also moves synchronously, and under the matching of the structures such as the sliding groove, the guide groove, the elastic film and the like, the effective sealing of the interior of the shell can be realized, so that the possibility of metal powder entering the shell is greatly reduced, and the smooth processing is ensured.

Specifically, the surfaces of the two mounting plates are all penetrated and provided with a plurality of limiting holes. Through the cooperation of structures such as mounting panel, spacing hole and bolt, be convenient for quick with this device and external equipment fixed connection.

Specifically, the square groove has all been seted up to the both sides lateral wall of base shaft, and spacing subassembly corresponds the joint through square groove and base shaft. The limiting assembly comprises a separation blade, a rectangular clamping block is fixedly mounted on one side of the separation blade, and a plurality of springs are fixedly mounted on the other side of the separation blade. Through the cooperation of square groove, rectangle fixture block and spring isotructure during the use, can realize effective spacing to the base shaft, cooperate standing groove and spring isotructure simultaneously and can also realize the quick dismantlement of base shaft, and then for the maintenance and the change of later stage base shaft provide very big facility, whole operation is simpler and labour saving and time saving.

The specific working principle and the using method of the base shaft driving device are as follows:

when the device is used, the motor is started firstly, the second worm and the base shaft are driven to rotate under the matching of the structures such as the second worm, the supporting rod, the placing groove and the limiting assembly, the vertical reciprocating movement of the motor, the second worm and the base shaft is realized under the matching of the structures such as the first worm, the first guide rod, the convex block and the base plate, and further the printing and processing can be better matched; when the second worm moves, the sleeve block also moves synchronously, and the effective sealing of the interior of the shell can be realized under the matching of structures such as a sliding groove, a guide groove, an elastic film and the like, so that the possibility of metal powder entering the shell is greatly reduced, and the smooth processing is ensured; and through the cooperation of square groove, rectangle fixture block and spring isotructure, can realize effective spacing to the base shaft, cooperate standing groove and spring isotructure simultaneously and can also realize the quick dismantlement of base shaft, and then for the maintenance and the change of later stage base shaft provide very big facility, the whole operation is simpler and labour saving and time saving, the experience of product is felt better, the practicality is higher.

Referring to fig. 8-11, the metering powder feeding device of the present invention includes a fixed box, a groove is formed inside the fixed box, a driving motor is fixedly connected to a side surface of the fixed box, a fixed threaded rod is fixedly connected to one end of the driving motor penetrating through the fixed box, a moving seat is rotatably connected to a surface of the fixed threaded rod through a thread, a moving frame is fixedly connected to a surface of the moving seat, a transport box is fixedly connected to a side surface of the moving frame, a powder adding port is fixedly connected to a top of the transport box, a powder storage box is fixedly connected to a top of the fixed box, a chute is formed inside the powder storage box, a powder storage outlet is fixedly connected to a bottom of the powder storage box, a fixed port is fixedly connected to a bottom of the transport box, a powder supplementing box is fixedly connected to a bottom of the fixed box, a powder supplementing inlet is fixedly connected to a top of, the inside sliding connection of sliding seat has the dead lever, and the one end fixed connection of dead lever is on the fixed slot, and the fixed slot is seted up on fixed case, the side fixedly connected with mount pad of fixed case.

In this embodiment, through the removal seat that the screw thread rotation is connected on fixed thread rod surface, remove the removal frame that seat fixed surface connects, remove a side fixed connection's transport box, transport box top fixed connection's the powder mouth that adds makes things convenient for the staff to add, avoids because the interpolation is untimely, leads to influencing normal use.

Specifically, the inside sliding connection of spout has the sliding closure, and the kerve has been seted up to the inside of sliding closure.

In this embodiment, through the inside kerve of seting up of sliding cover, make things convenient for the staff to take sliding cover out from the spout, facilitate the use.

Specifically, the inside of the powder storage box is rotatably connected with a quantity control blade through a bearing, the top of the quantity control blade is fixedly connected with a crank, and the quantity control blade is positioned at the top of the powder storage outlet.

In this embodiment, lie in storage powder export top through accuse volume leaf, make things convenient for the staff to control the volume of advancing of metal powder, facilitate the use.

Specifically, the inside fixedly connected with filter of transport box, the filtration pore has been seted up to the inside of filter.

In this embodiment, through the inside filtration pore of seting up of filter, filter the metal powder that uses, avoid getting into the foreign matter, influence normal use.

Specifically, driving motor's fixed surface is connected with the motor frame, and the side fixed connection of motor frame is on fixed case.

In this embodiment, through the motor frame of driving motor fixed surface connection, carry out the guard action to driving motor, avoid taking place to damage.

Specifically, the quantity of mount pad is two, and the mounting groove has been seted up to the inside of mount pad.

In this embodiment, through the inside mounting groove of seting up of mount pad, make things convenient for the staff to install and use, make it more stable.

The working principle and the using process of the metering powder feeding device are as follows:

when the metal powder replenishing box is used, a worker pulls the pull groove to draw the sliding cover out of the sliding groove, metal powder to be used is added into the powder storing box, the crank is pulled to drive the quantity control blade to start rotating, the position of the rotating quantity control blade is changed, so that the quantity of the metal powder entering the powder storing outlet is conveniently adjusted, when the metal powder in the powder replenishing box is used, the driving motor is arranged to start to drive the driving motor to pass through the fixed threaded rod fixedly connected with the output end of the fixed box to start rotating, the surface of the rotating fixed threaded rod drives the moving seat through threaded connection, the moving seat drives the moving frame fixedly connected with the surface to start moving, the moving frame drives the transport box to start moving, the transport box is moved to the lower part of the powder storing box, and the metal powder enters the inside of the metal powder adding outlet from the powder storing outlet, the metal powder is filtered through the filter hole, the foreign matter is prevented from entering, the use is influenced, the movable transportation box comes to the top of the powder supplementing box, the metal powder inside the transportation box enters the inside of the powder supplementing inlet through the fixed port, the powder supplementing mechanism entering the printer body through the powder inlet prints, and therefore the movable transportation box is convenient to use, slides on the surface of the fixed rod through the sliding seat, and is limited in the position of the transportation box.

The working principle/use method of one embodiment of the invention is as follows:

when the base shaft type SLM metal printer is used, the base shaft is driven by a base shaft driving device to rotate and descend periodically, and finally (farthest/lower) reaches the position (or called central position) of the axis of a powder cylinder;

in practice, the size of the powder cylinder is selected according to the size of the workpiece to be rotated, as will be understood by those skilled in the art.

Before printing, filling the powder cylinder with metal powder, or at least filling the powder cylinder with metal powder exceeding 1/3 of the base shaft diameter;

the surface of a workpiece with metal powder in printing is automatically adhered in the rotation process of the base shaft, the powder scraping roller is used as a powder scraping device, a powder spreading device and a powder scraping device are omitted, and the distance between the powder scraping roller and the surface of the base shaft is the unit printing thickness; as the supplement, a powder supplement mechanism is adopted to supplement the metal powder, so that the problems of uneven, uneven and loose metal powder on the surface of the workpiece in printing and the like after the metal powder is reduced are solved;

laser emitted by the laser source penetrates through the crack to gradually carry out laser sintering (printing) on the surface of the workpiece under printing.

According to the description of the invention and the attached drawings, the base shaft type SLM metal printer of the invention can be easily manufactured or used by a person skilled in the art, and can generate the positive effects recorded by the invention.

Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. A basic shaft type SLM metal printer is characterized in that: comprises a printer body (100) and a metering powder feeding device (03);

the powder inlet (321) of the metering powder feeding device (03) is communicated with a powder supplementing mechanism (10) of the printer body (100) through a powder feeding pipe (3);

the printer body (100) comprises a frame (5);

a powder cylinder (7) is arranged in the middle of the rack (5);

the powder cylinder (7) is cylindrical, and the extension direction of the powder cylinder is parallel to the horizontal plane;

a base shaft driving device (400) is arranged in the powder cylinder (7);

the mounting plates (41) on the two sides of the base shaft driving device (400) are respectively detachably and fixedly connected with the lower surface of the inner side of the powder cylinder (7);

the base shaft driving device (400) is used for driving the base shaft (414) to rotate and/or move up and down;

the extending direction of the base shaft (414) is the same as the extending direction of the powder cylinder (7);

a long strip-shaped opening (82) is correspondingly arranged at the position, above the base shaft (414), of the powder cylinder (7), two sides of the extending direction of the long strip-shaped opening (82) are connected with slit clamping sheets (8), and a gap (81) is formed between the two slit clamping sheets (8);

a laser (6) is arranged at the top of the rack (5) and at a position right above the gap (81);

a powder scraping roller (9) is arranged on one side below the gap (81), and the powder scraping roller (9) is detachably and fixedly connected with the inner side wall of the powder cylinder (7);

and a powder supplementing mechanism (10) for supplementing metal powder between the base shaft (414) and the powder scraping roller (9) is also arranged in the powder cylinder (7).

2. The base axis SLM metal printer of claim 1, characterized by: the base shaft driving device comprises two mounting plates (41), wherein a shell (42) is fixedly mounted at the bottom of each of the two mounting plates (41), a first worm (43) and two first guide rods (44) are fixedly mounted in one of the shell (42), a convex block (45) is sleeved on the outer surface of each of the two first guide rods (44), a second worm (46) is rotatably mounted between the two convex blocks (45), a bottom plate (47) is fixedly mounted on the side wall of one of the convex blocks (45), a motor (48) is fixedly mounted at the top of the bottom plate (47), a second guide rod (49) is fixedly mounted in the other of the shell (42), a moving block (410) is sleeved on the outer surface of the second guide rod (49), and a support rod (411) is rotatably mounted on the side wall of the moving block (410) through a bearing, the outer surfaces of the second worm (46) and the supporting rod (411) are respectively sleeved with a sleeve block (412), one opposite side of the second worm (46) and the supporting rod (411) is respectively provided with a placing groove (417), a limiting component (418) is arranged inside the placing groove (417), and a base shaft (414) is arranged between the two limiting components (418);

the metering powder feeding device comprises a fixed box (31), a groove (32) is formed in the fixed box (31), a driving motor (33) is fixedly connected to the side face of the fixed box (31), the driving motor (33) penetrates through one end of the fixed box (31) and is fixedly connected with a fixed threaded rod (34), the surface of the fixed threaded rod (34) is connected with a moving seat (35) through threaded rotation, the surface of the moving seat (35) is fixedly connected with a moving frame (36), the side face of the moving frame (36) is fixedly connected with a transportation box (37), a powder adding port (38) is fixedly connected to the top of the transportation box (37), a powder storage box (39) is fixedly connected to the top of the fixed box (31), a sliding groove (310) is formed in the powder storage box (39), and a powder storage outlet (315) is fixedly connected to the bottom of the powder storage box (39), the bottom fixedly connected with fixed mouthful (318) of transportation box (37), the bottom fixedly connected with of fixed case (31) mends powder box (319), the powder import (320) is mended to the top fixedly connected with of benefit powder box (319), the side fixedly connected with of benefit powder box (319) goes into powder mouth (321), the side fixedly connected with sliding seat (322) of transportation box (37), the inside sliding connection of sliding seat (322) has dead lever (323), the one end fixed connection of dead lever (323) is on fixed slot (324), fixed slot (324) are seted up on fixed case (31), the side fixedly connected with mount pad (326) of fixed case (31).

3. The base axis SLM metal printer of claim 2, characterized by: and a heater for heating the powder cylinder (7) is arranged on the outer side of the powder cylinder (7).

4. The base axis SLM metal printer of claim 2, characterized by: the second worm (46) is in transmission connection with the first worm (43), and the second worm (46) is fixedly connected with an output shaft of the motor (48).

5. The base axis SLM metal printer of claim 2, characterized by: two spout (415) have all been seted up to the relative one side of casing (42), guide way (420) have been seted up to the inside symmetry of casing (42), two guide way (420) all correspond the switch-on with spout (415), two the joint has elastic membrane (413) between guide way (420), the one end of elastic membrane (413) and the cell wall fixed connection of spout (415), the other end of elastic membrane (413) and the fixed surface of pocket piece (412) are connected.

6. The base axis SLM metal printer of claim 2, characterized by: the surfaces of the two mounting plates (41) are both provided with a plurality of limiting holes (416) in a penetrating manner;

the side walls of two sides of the base shaft (414) are respectively provided with a square groove (419), and the limiting assembly (418) is correspondingly clamped with the base shaft (414) through the square groove (419);

the limiting assembly (418) comprises a blocking piece (41801), a rectangular clamping block (41802) is fixedly mounted on one side of the blocking piece (41801), and a plurality of springs (41803) are fixedly mounted on the other side of the blocking piece (41801).

7. The base axis SLM metal printer of claim 2, characterized by: the sliding groove (310) is connected with a sliding cover (311) in a sliding mode, and a pull groove (312) is formed in the sliding cover (311).

8. The base axis SLM metal printer of claim 2, characterized by: the inside of storing up powder box (39) is connected with accuse volume leaf (313) through the bearing rotation, the top fixedly connected with crank (314) of accuse volume leaf (313), accuse volume leaf (313) are located the top of storing up powder export (315).

9. The base axis SLM metal printer of claim 2, characterized by: the inside fixedly connected with filter (316) of transport box (37), filtration hole (317) have been seted up to the inside of filter (316).

10. The base axis SLM metal printer of claim 2, characterized by: the surface of the driving motor (33) is fixedly connected with a motor frame (325), and the side surface of the motor frame (325) is fixedly connected to the fixed box (31);

the number of the installation bases (326) is two, and installation grooves (327) are formed in the installation bases (326).