CN215033630U

CN215033630U - Base shaft type metal 3D printer

Info

Publication number: CN215033630U
Application number: CN202022966094.1U
Authority: CN
Inventors: 韩品连; 宁传龙
Original assignee: Zhejiang Yidong Technology Co Ltd
Current assignee: Zhejiang Yidong Technology Co Ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-12-07
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses a base shaft type metal 3D printer, which comprises a frame; the middle part of the frame is provided with a powder cylinder; the frame is connected with the base shaft driving device; the opposite side of the frame and the powder cylinder is correspondingly provided with a long strip-shaped limiting through hole; the base shaft comprises a base shaft body and base shaft connecting shafts at two ends; the base shaft is positioned in the powder cylinder, and base shaft connecting shafts at two ends of the base shaft respectively penetrate through the elongated limiting through holes to be detachably and fixedly connected with the base shaft driving device; and sealing components for preventing metal powder in the powder cylinder from overflowing are arranged between the base shaft connecting shaft and the long-strip-shaped limiting through hole. The utility model discloses a basic shaft type metal 3D printer simple structure, convenient to use has saved and has spread complicated components such as powder device and scraping powder device, has satisfied the requirement such as the processing symmetry of some rotary parts well, has guaranteed the quality of printing the processing product, and the work piece temperature stress in printing is controlled.

Description

Base shaft type metal 3D printer

Technical Field

The utility model relates to a 3D printing apparatus technical field, concretely relates to base shaft type metal 3D printer.

Background

The metal 3D printer has the advantages of personalized design, rapid forming and short manufacturing period, is very suitable for manufacturing metal parts with small batch, personalization, complex surfaces and internal structures, and in the process of 3D printing of metal powder, high-energy-density laser directly acts on the metal powder and rapidly scans and moves to rapidly melt and then rapidly condense the metal powder.

For example, chinese patent application No.: CN201910146552.6 discloses a convenient timely refrigerated metal 3D printer, including roof, bracing piece, bottom fixing base, top fixing base, first motor, first lead screw, first rotating sleeve, second motor, second lead screw and third motor, be connected between the bottom of roof and the bracing piece, and the bottom of bracing piece is connected with the top of top fixing base to the bottom of top fixing base is provided with the bottom fixing base, the centre of top fixing base and top fixing base is provided with middle fixed station, and the top of the both sides position of middle fixed station is provided with the movable block, structure as an organic whole between one side of movable block and the installation piece. The convenient in time refrigerated metal 3D printer of this kind of mode can be timely carry out selective cooling work to the mould after the printing is accomplished in the in-process that uses, and whole cooling work is to the less metal of the inside influence of whole stock chest, but the 3D printer is at the in-process that uses, generally need drive the base shaft, drive through drive arrangement usually among the prior art, but the base shaft drive arrangement among the prior art is inconvenient carries out rotation regulation to the base shaft, the flexibility is not good, the base shaft uses easy emergence wearing and tearing for a long time simultaneously, inconvenient the change, the practicality is not good.

In the aerospace field, mainly used 3D prints small-size aeroengine's spare part, mostly is rotary part, can shorten the research and development cycle that novel aerospace was equipped, optimizes part structure, and 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.

Important parts on aerospace equipment are generally made of strategic materials and are very expensive, the shaft end sealing structure of the conventional base shaft type SLM metal printer is unreasonable, and Chinese patent publication No. CN206702220U discloses an SLM type 3D printer which comprises a shell, wherein the left end inside the shell is provided with an installation frame, a rotating shaft is arranged inside the installation frame, the right end of the upper side of the installation frame is provided with a motor, the rotating shaft inside the installation frame is provided with a fixed sleeve, the right side of the fixed sleeve is provided with a connecting rod, the right side of the connecting rod is provided with a first hydraulic cylinder, the right side of the first hydraulic cylinder is provided with a connecting sleeve, a metal powder tank is arranged inside the connecting sleeve, the left side and the right side of the metal powder tank are provided with scrapers, the lower side of the shell is provided with an argon storage cavity, the middle part of the argon storage cavity is provided with a first groove, the first groove is internally provided with a second hydraulic cylinder, the upper side of the second hydraulic cylinder is provided with a second groove, and the lower end inside the second groove is provided with a substrate, argon gas storage chamber left and right sides is equipped with the exhaust tube, the blast pipe left side is equipped with fixed frame, the inside top of fixed frame is equipped with the laser instrument, the laser instrument downside is equipped with the laser protection mirror, the device passes through rotary drive device's setting, can make things convenient for the printer to add the metal powder effectively, the work efficiency is improved, but do not consider pivot (base shaft) both ends to stretch out and print the chamber outdoor, the base shaft is under drive assembly's drive, upper and lower back-and-forth movement, the metal powder of high price can get into and print the chamber outdoor, cause unnecessary extravagant and damage other dirt-proof parts that need of equipment.

In addition, the metal 3D 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.

Based on the circumstances, the utility model provides a basic shaft type metal 3D printer can effectively solve above problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a basic shaft type metal 3D printer. The utility model discloses a base shaft formula metal 3D printer simple structure, convenient to use has saved complicated components such as shop's powder device and scraping device, and in current ripe SLM principle, the base shaft that adopts rectangular shape is as printing the base station, and the shaping of work piece is from inside to outside, and every layer all is on same radius, and laser scanning only goes on at the axial selectivity, and the work piece rotates the angle that a line width corresponds after printing a line when same radius, sinks a section thickness after accomplishing the whole circle of same radius and printing, continues to repeat above-mentioned process, accomplishes the manufacturing of whole work piece; 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 the printed workpiece is controlled.

The utility model discloses a following technical scheme realizes:

a basic shaft type metal 3D printer 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;

the upper parts of two outer side walls of the frame in the extending direction of the powder cylinder are respectively detachably and fixedly connected with two mounting plates of the base shaft driving device, and the lower parts of the two outer side walls are respectively detachably and fixedly connected with two fixing plates of the base shaft driving device;

the opposite sides of the frame and the powder cylinder are correspondingly provided with elongated limiting through holes;

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 base shaft comprises a base shaft body and base shaft connecting shafts at two ends;

the base shaft is positioned in the powder cylinder, and base shaft connecting shafts at two ends of the base shaft respectively penetrate through the elongated limiting through holes to be detachably and fixedly connected with the base shaft driving device;

sealing components for preventing metal powder in the powder cylinder from overflowing are arranged between the base shaft connecting shaft and the long-strip-shaped limiting through hole;

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.

As a preferred technical proposal of the utility model, the base shaft driving device comprises two mounting plates which are arranged in parallel, wherein the lower sides of the two mounting plates are both provided with a fixed plate, a threaded rod is rotationally connected between the mounting plates and the fixed plate, the lower end surface of the fixed plate is fixedly connected with a first motor, the driving end of the first motor penetrates through the fixed plate and is fixedly connected with the threaded rod coaxially, a moving block is connected with the threaded rod in a threaded manner, two through holes are symmetrically arranged on the moving block, a sliding rod is arranged in each through hole in a matching manner, the top end of the sliding rod is fixedly connected with the mounting plate, the bottom end of the sliding rod is fixedly connected with the fixed plate, a bearing plate is fixedly connected with the side wall of the moving block, a second motor is fixedly arranged on the upper end surface of the bearing plate, a rotating plate is fixedly connected with the driving end of the second motor, and a limiting plate is fixedly connected with the side wall of the rotating plate, the top fixedly connected with connecting plate of limiting plate, threaded connection has first lead screw on the connecting plate, the first commentaries on classics piece of top fixedly connected with of first lead screw, the bottom of first lead screw is rotated and is connected with the briquetting, the lower terminal surface fixedly connected with blotter of briquetting, the downside of blotter is equipped with the installation piece, the first fixture block of fixedly connected with on the inner wall of installation piece, one side of first fixture block is equipped with the second fixture block, threaded connection has the second lead screw on the installation piece, the one end fixedly connected with second commentaries on classics piece of second lead screw, and the other end and the second fixture block of second lead screw rotate and be connected, between first fixture block and the second fixture block with basic shaft connecting axle joint.

As a preferred technical scheme of the utility model, the sealing components all comprise movable sealing covers, sealing end covers, sealing rings, bearing seats and ball bearings;

the first shaft sleeve is sleeved on one side, close to the base shaft body, of the base shaft connecting shaft; one end of the first shaft sleeve is in contact with the first clamping block and the second clamping block, and the other end of the first shaft sleeve is fixedly connected with a bearing seat; the inner walls of the two groups of bearing seats are rotatably connected with ball bearings, and the inner walls of the two groups of ball bearings are rotatably connected with the base shaft connecting shaft;

the sealing end covers are fixedly connected to one sides of the two groups of bearing seats, sealing rings are arranged between the inner walls of the sealing end covers and the outer wall of the base shaft connecting shaft, movable sealing covers are fixedly connected to the side edges of the sealing end covers, and the other ends of the movable sealing covers are fixedly connected to the circumferential edges of the elongated limiting through holes on the inner side wall of the powder cylinder.

As an optimized technical scheme of the utility model, the powder jar outside is provided with and is used for the heater of powder jar heating.

As a preferred technical scheme of the utility model, equal fixed mounting has the rubber pad on the inner wall of first fixture block and second fixture block, the shape of rubber pad is circular-arc.

As a preferred technical scheme of the utility model, the symmetry is equipped with two mounting holes on the installation piece, and all matches in two mounting holes and be equipped with the guide arm, the bottom of guide arm and the lateral wall fixed connection of second fixture block.

As a preferred technical scheme of the utility model, equal a set of non slipping spur of fixedly connected with on the lateral wall of first commentaries on classics piece and second commentaries on classics piece, it is adjacent interval between the non slipping spur is the same.

As an optimal technical scheme of the utility model, all be equipped with the mounting hole on mounting panel and the fixed plate, the cross sectional shape of mounting panel and fixed plate is L shape.

As an optimized technical scheme of the utility model, the lower surface of blotter is equipped with anti-skidding line, and the blotter is made by rubber materials.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model discloses a base shaft formula metal 3D printer simple structure, convenient to use has saved complicated components such as shop's powder device and scraping device, and in current ripe SLM principle, the base shaft that adopts rectangular shape is as printing the base station, and the shaping of work piece is from inside to outside, and every layer all is on same radius, and laser scanning only goes on at the axial selectivity, and the work piece rotates the angle that a line width corresponds after printing a line when same radius, sinks a section thickness after accomplishing the whole circle of same radius and printing, continues to repeat above-mentioned process, accomplishes the manufacturing of whole work piece; 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 the printed workpiece is controlled.

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.

Base shaft drive arrangement has solved the inconvenient base shaft that carries out rotation regulation and inconvenient base shaft to wearing and tearing among the prior art and has carried out the problem of changing to the base shaft.

Base shaft drive arrangement passes through the second motor, changes board, first lead screw, clamp plate, installation piece, first fixture block and second fixture block, and the convenience is rotatory to the base shaft, improves base shaft drive arrangement's flexibility, conveniently installs and dismantles the base shaft, makes things convenient for operating personnel to operate, improves operating personnel's work efficiency.

1. This base shaft drive arrangement through second motor, commentaries on classics board, first lead screw, clamp plate and installation piece, conveniently rotates the base shaft, improves base shaft drive arrangement's flexibility, conveniently prints, improves base shaft drive arrangement's application scope, and the practicality is stronger.

2. This basic shaft drive arrangement through limiting plate, clamp plate, installation piece, first fixture block and second fixture block, conveniently installs and dismantles the basic shaft, makes things convenient for operating personnel to operate, improves operating personnel's work efficiency, and the setting is simple, and the cost is lower, and the practicality is strong.

The utility model discloses a sealing washer that sets up at base shaft (base shaft connecting axle) outer wall and the end cover of fixed seal circle and activity sealed cowling, can effectually avoid when the base shaft reciprocates (or rotates), metal powder enters into the place beyond the powder jar, can not cause the material extravagant and other parts to damage, and simultaneously, the base shaft can be nimble freely move unrestricted.

Drawings

FIG. 1 is a schematic structural view of the present invention (workpiece omitted);

fig. 2 is a partially enlarged view (workpiece omitted) of fig. 1 at C according to the present invention;

FIG. 3 is a schematic cross-sectional view taken at H-H in FIG. 1 (the workpiece is not omitted) according to the present invention;

fig. 4 is a schematic structural view of the sealing assembly of the present invention;

fig. 5 is a schematic structural view of the base shaft driving device of the present invention;

FIG. 6 is an enlarged view of the cross-section Q of FIG. 5 according to the present invention;

fig. 7 is a schematic view of the internal structure of the mounting block of the present invention.

In the figure: 434. 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; 500. a seal assembly; 43. a base shaft; 431. a base shaft body; 432. a base shaft connecting shaft; 433. a shaft sleeve; 501. a movable sealing cover; 502. sealing the end cap; 503. a seal ring; 504. a bearing seat; 505. a ball bearing; 51. a long strip-shaped limiting through hole;

41. mounting a plate; 42. a fixing plate; 40. a threaded rod; 44. a first motor; 45. a moving block; 46. a slide bar; 47. a carrier plate; 48. a second motor; 49. rotating the plate; 410. a limiting plate; 411. a connecting plate; 412. A first lead screw; 413. a first rotating block; 414. briquetting; 415. a cushion pad; 416. mounting blocks; 417. a first clamping block; 418. a second fixture block; 419. a second lead screw; 420. a second rotating block; 421. a rubber pad; 422. A guide bar; 423. and (4) anti-skid blocks.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the following description of the preferred embodiments of the present invention is given with reference to the accompanying examples, but it should be understood that the drawings are for illustrative purposes only and are not to 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 7, a base shaft type metal 3D printer includes a frame;

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

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

Example 2:

as shown in fig. 1 to 7, a base shaft type metal 3D printer includes a frame;

the middle part of the frame is provided with a 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;

Referring to fig. 5-7, the base shaft driving device of the present invention comprises two parallel mounting plates, a fixed plate is disposed at the lower side of each of the two mounting plates, a threaded rod is rotatably connected between the mounting plates and the fixed plate, a first motor is fixedly connected to the lower end surface of the fixed plate, a driving end of the first motor penetrates through the fixed plate and is coaxially and fixedly connected to the threaded rod, a moving block is threadedly connected to the threaded rod, two through holes are symmetrically formed in the moving block, a sliding rod is disposed in each of the two through holes, a top end of the sliding rod is fixedly connected to the mounting plate, a bottom end of the sliding rod is fixedly connected to the fixed plate, a bearing plate is fixedly connected to the side wall of the moving block, a second motor is fixedly mounted to the upper end surface of the bearing plate, a rotating plate is fixedly connected to the driving end of the second motor, a limiting plate is fixedly connected to the side wall of the rotating plate, and a connecting plate is fixedly connected to the top end of the limiting plate, threaded connection has first lead screw on the connecting plate, the first commentaries on classics piece of top fixedly connected with of first lead screw, the bottom of first lead screw is rotated and is connected with the briquetting, the lower terminal surface fixedly connected with blotter of briquetting, the downside of blotter is equipped with the installation piece, the first fixture block of fixedly connected with on the inner wall of installation piece, one side of first fixture block is equipped with the second fixture block, threaded connection has the second lead screw on the installation piece, the one end fixedly connected with second commentaries on classics piece of second lead screw, and the other end of second lead screw rotates with the second fixture block to be connected, between first fixture block and the second fixture block with basic shaft connecting axle joint.

In the embodiment, the drive end of the first motor can drive the threaded rod to rotate, the threaded rod can drive the moving block to move up and down, the moving block can move up and down conveniently to move the base shaft, so that the height can be conveniently adjusted, the slide rod can improve the moving stability of the moving block, the drive end of the second motor can drive the rotating plate to rotate, so that the base shaft can be rotated and conveniently adjusted, the limiting plate can limit the mounting block conveniently, so that the base shaft can be conveniently mounted and dismounted, the first rotating block can drive the first lead screw to rotate, the rotating block can drive the pressing block to move so as to conveniently mount and dismount the mounting block, the cushion pad can improve the friction force between the pressing block and the mounting block, the falling-off phenomenon is avoided, the second rotating block can facilitate an operator to rotate the second lead screw, and the rotating of the second lead screw can conveniently drive the second clamping block to move, therefore, the base shaft is conveniently fixed, and the first clamping block and the second clamping block are convenient to mount and dismount the base shaft (through being clamped with the base shaft connecting shaft).

Specifically, the sealing assemblies respectively comprise a movable sealing cover, a sealing end cover, a sealing ring, a bearing seat and a ball bearing;

Specifically, a heater for heating the powder cylinder is arranged on the outer side of the powder cylinder.

Specifically, rubber pads are fixedly mounted on the inner walls of the first clamping block and the second clamping block, and the rubber pads are arc-shaped.

In this embodiment, the rubber pad can improve first fixture block and second fixture block with frictional force between the basic shaft connecting axle improves the stability of basic shaft, makes the work that carries on that the basic shaft can be stable.

Specifically, the mounting block is symmetrically provided with two mounting holes, guide rods are arranged in the two mounting holes in a matched mode, and the bottom ends of the guide rods are fixedly connected with the side wall of the second clamping block.

In this embodiment, the guide arm can make the second fixture block carry out stable reciprocating to conveniently install and dismantle the basic shaft, improve operating personnel's work efficiency.

Specifically, equal fixedly connected with a set of non slipping spur on the lateral wall of first commentaries on classics piece and second commentaries on classics piece, the interval between the adjacent non slipping spur is the same.

In this embodiment, the non slipping spur can increase the frictional force between operating personnel hand and first commentaries on classics piece and the second commentaries on classics piece, makes things convenient for operating personnel to operate.

Specifically, mounting holes are formed in the mounting plate and the fixing plate, and the cross sections of the mounting plate and the fixing plate are L-shaped.

In this embodiment, the mounting hole is convenient to be installed mounting panel and fixed plate, and the setting is simple, and the cost is lower, and the practicality is strong.

Specifically, the lower surface of the buffer pad is provided with anti-skidding lines, and the buffer pad is made of rubber materials.

In this embodiment, the blotter can improve the frictional force between briquetting and the installation piece, can improve stability to make the base shaft more stable at the pivoted in-process.

Basic shaft drive arrangement's theory of operation and use flow:

when the height of the base shaft needs to be adjusted, the first motor is driven to work, the driving end of the first motor drives the threaded rod to rotate, the threaded rod rotates to enable the moving block to move up and down, the moving block moves to enable the base shaft to move up and down, when the base shaft needs to be rotated, the second motor is driven to work, the driving end of the second motor drives the rotating plate to rotate, so that the base shaft rotates, adjustment is convenient, when the base shaft needs to be replaced, the first rotating block is rotated at first, the first rotating block drives the first screw rod to rotate, the press block removes control over the installation block, the installation block is taken out, then the second rotating block is rotated to enable the second screw rod to rotate, the second screw rod rotates to enable the second clamping block to move upwards, the second clamping block removes control over the base shaft, and the worn base shaft (under other situations needing to be replaced) is taken out, and then a new base shaft is inserted, the second rotating block is rotated to complete fixation, and then the mounting block is conveniently arranged in the limiting plate, and the first rotating block is rotated to complete fixation.

The utility model discloses a theory of operation/application method of embodiment as follows:

when the metal 3D 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 center position) of the axis of the 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 and drawings of the present invention, it is easy for those skilled in the art to manufacture or use the base shaft type metal 3D printer of the present invention, and the positive effects described in the present invention can be produced.

Unless otherwise specified, in the present invention, if the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the 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 used 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 both fixed and removable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.

Claims

1. The utility model provides a base shaft formula metal 3D printer which characterized in that: 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;

the upper parts of two outer side walls of the frame (5) in the extending direction of the powder cylinder (7) are respectively detachably and fixedly connected with two mounting plates (41) of the base shaft driving device (400), and the lower parts of the two outer side walls are respectively detachably and fixedly connected with two fixing plates (42) of the base shaft driving device (400);

a long-strip-shaped limiting through hole (51) is correspondingly formed in the opposite side of the frame (5) and the powder cylinder (7);

the base shaft driving device (400) is used for driving the base shaft (43) to rotate and/or move up and down;

the extending direction of the base shaft (43) is the same as that of the powder cylinder (7)

The base shaft (43) comprises a base shaft body (431) and base shaft connecting shafts (432) at two ends;

the base shaft (43) is positioned in the powder cylinder (7), and base shaft connecting shafts (432) at two ends of the base shaft respectively penetrate through the elongated limiting through holes (51) to be detachably and fixedly connected with the base shaft driving device (400);

sealing assemblies (500) for preventing metal powder in the powder cylinder (7) from overflowing are arranged between the base shaft connecting shaft and the elongated limiting through hole (51);

a long strip-shaped opening (82) is correspondingly arranged at the position, above the base shaft (43), 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 (43) and the powder scraping roller (9) is also arranged in the powder cylinder (7).

2. The base shaft metal 3D printer of claim 1, wherein: the base shaft driving device comprises two parallel mounting plates (41), a fixing plate (42) is arranged on the lower side of each mounting plate (41), a threaded rod (40) is rotatably connected between each mounting plate (41) and each fixing plate (42), a first motor (44) is fixedly connected to the lower end face of each fixing plate (42), the driving end of each first motor (44) penetrates through each fixing plate (42) and is coaxially and fixedly connected with the corresponding threaded rod (40), a moving block (45) is connected to each threaded rod (40) in a threaded manner, two through holes are symmetrically formed in each moving block (45), a sliding rod (46) is arranged in each through hole in a matched manner, the top end of each sliding rod (46) is fixedly connected with each mounting plate (41), the bottom end of each sliding rod (46) is fixedly connected with each fixing plate (42), and a bearing plate (47) is fixedly connected to the side wall of each moving block (45), a second motor (48) is fixedly mounted on the upper end face of the bearing plate (47), a rotating plate (49) is fixedly connected to the driving end of the second motor (48), a limiting plate (410) is fixedly connected to the side wall of the rotating plate (49), a connecting plate (411) is fixedly connected to the top end of the limiting plate (410), a first lead screw (412) is in threaded connection with the connecting plate (411), a first rotating block (413) is fixedly connected to the top end of the first lead screw (412), a pressing block (414) is rotatably connected to the bottom end of the first lead screw (412), a cushion pad (415) is fixedly connected to the lower end face of the pressing block (414), a mounting block (416) is arranged on the lower side of the cushion pad (415), a first clamping block (417) is fixedly connected to the inner wall of the mounting block (416), a second clamping block (418) is arranged on one side of the first clamping block (417), and a second lead screw (419) is in threaded connection with the mounting block (416), one end of the second screw rod (419) is fixedly connected with a second rotating block (420), the other end of the second screw rod (419) is rotatably connected with a second clamping block (418), and the first clamping block (417) and the second clamping block (418) are clamped with the base shaft connecting shaft (432).

3. The base shaft metal 3D printer of claim 2, wherein:

the sealing assemblies (500) respectively comprise a movable sealing cover (501), a sealing end cover (502), a sealing ring (503), a bearing seat (504) and a ball bearing (505);

the first shaft sleeve (433) is sleeved on one side, close to the base shaft body (431), of the base shaft connecting shaft (432); one end of the first shaft sleeve (433) is in contact with the first fixture block (417) and the second fixture block (418), and the other end of the first shaft sleeve is fixedly connected with a bearing seat (504); the inner walls of the two groups of bearing seats (504) are rotatably connected with ball bearings (505), and the inner walls of the two groups of ball bearings (505) are rotatably connected with the base shaft connecting shaft (432);

two sets of end cover (502) fixed connection is in two sets of bearing frames (504) one side, and is two sets of end cover (502) inner wall with be provided with sealing washer (503) between base shaft connecting axle (432) outer wall, end cover (502) side fixedly connected with movable sealing cover (501), movable sealing cover (501) other end fixed connection be in rectangular shape spacing through-hole (51) circumference edge on powder jar (7) inside wall.

4. The base shaft metal 3D printer of claim 2, wherein: and a heater for heating the powder cylinder (7) is arranged on the outer side of the powder cylinder (7).

5. The base shaft metal 3D printer of claim 2, wherein: rubber pads (421) are fixedly mounted on the inner walls of the first fixture block (417) and the second fixture block (418), and the rubber pads (421) are arc-shaped.