阅读说明：本技术 一种金属3d打印载物台外驱动高温密闭箱 (Metal 3D prints objective table external drive high temperature seal box ) 是由 刘正文 赵时迁 罗毅彪 焦向东 于 2020-12-11 设计创作，主要内容包括：本发明公开了一种金属3D打印载物台外驱动高温密闭箱,包括融熔挤压喷嘴、载物平台、平台顶杆、平动隔热底盖、上滑动连接板、U型法兰固定件、Y轴向小导轨、滚珠滑块、下滑动连接板、X轴向小导轨、大座板、穿顶杆法兰轴承、底开窗高温箱体、箱体顶脚、座板顶脚。该机构设计能够使置于高温密闭箱体内,金属融熔挤压头下方的载物平台沿X Y Z轴向快速运动,同时密闭箱体的下方窗口由可平面滑动的平动隔热底盖覆盖密封,该高温密闭箱的动态准密封结构设计巧妙、结构紧凑,在高温密闭箱体内无任何传动机构和机电部件,又避免高温密闭箱体向外散失热量,从而满足了金属熔融挤压快速成形方法中对在高温密闭箱体环境下进行载物平台可控运动的要求。(The invention discloses an externally-driven high-temperature closed box for a metal 3D printing objective table, which comprises a melting extrusion nozzle, an objective table, a platform ejector rod, a translational heat-insulation bottom cover, an upper sliding connecting plate, a U-shaped flange fixing piece, a Y-axis small guide rail, a ball sliding block, a lower sliding connecting plate, an X-axis small guide rail, a large base plate, an ejector rod penetrating flange bearing, a bottom-opening window high-temperature box body, a box body top foot and a base plate top foot. The dynamic quasi-sealing structure of the high-temperature closed box is ingenious in design and compact in structure, any transmission mechanism and electromechanical parts are not arranged in the high-temperature closed box, heat dissipation of the high-temperature closed box is avoided, and the requirement of carrying out controllable movement of the carrying platform in the environment of the high-temperature closed box in a metal melting extrusion rapid forming method is met.)

1. The utility model provides a metal 3D prints objective table external drive high temperature seal box which characterized in that includes:

the device comprises a melting extrusion nozzle (1), a carrying platform (2), a platform ejector rod (3), a translational heat insulation bottom cover (4), an upper sliding connecting plate (5), a U-shaped flange fixing piece (6), a Y-axis small guide rail (7), a ball sliding block (8), a lower sliding connecting plate (9), an X-axis small guide rail (10), a large seat plate (11), an ejector rod penetrating flange bearing (12), a bottom-opening window high-temperature box body (13), a box body top foot (14) and a seat plate top foot (15);

the melting extrusion nozzle (1) passes through and is fixed on a round hole at the top of a high-temperature box body (13) with a bottom window, the center of the lower part of a carrying platform (2) is fixedly connected with the upper end of a platform ejector rod (3), the platform ejector rod (3) passes through the round hole at the center of a translational heat-insulation bottom cover (4) and passes through an ejector rod flange bearing (12), the lower end of the platform ejector rod passes through a large square hole in the middle of a large base plate (11), the lowest end of the platform ejector rod is fixedly connected with an external three-axial-driven sliding block mechanism, the translational heat-insulation bottom cover (4) and an upper sliding connecting plate (5) are fixedly connected with the bottom of the translational heat-insulation bottom cover (4) through six flange feet of the translational heat-insulation bottom cover, the lower part of the upper sliding connecting plate (5) is fixedly connected with a U-shaped flange fixing piece (6), the ejector rod flange bearing (12) is fixed in the round hole in the middle, four ball sliders (8) on the Y-axis small guide rail (7) are symmetrically and fixedly connected with the upper side surface of the lower sliding connection plate (9), four ball sliders (8) are symmetrically and fixedly arranged on the lower side surface of the lower sliding connection plate (9) along the X-axis direction, the four ball sliders (8) are slidably connected with the X-axis small guide rail (10), the two X-axis small guide rails (10) are parallelly installed on two sides of a large square hole in the middle of a large base plate (11), four box jacking feet (14) are arranged on the upper side of the four corners of the large base plate (11) to be fixedly connected with an upper bottom windowing high-temperature box body (13), and four corner lower sides of the large base plate (11) are fixed with an external platform through four base plate jacking feet (15).

2. The metal 3D printing objective table external drive high-temperature closed box according to claim 1, characterized in that the platform ejector rod (3) passes through a lower square window of a bottom-opening high-temperature box body (13), passes through a translational heat insulation bottom cover (4), passes through a middle round hole of an upper sliding connecting plate (5), passes through an ejector rod flange bearing (12), and is connected with an external drive device at the lowest end, and can perform Z-axis lifting movement.

3. The metal 3D printing objective table external drive high-temperature closed box according to claim 2, characterized in that the platform ejector rod (3) is connected with an external drive device through the lowest end, and can be driven by the external drive device to move along a X, Y-axis plane, at this time, when the external drive device moves along the X-axis direction, the platform ejector rod (3) drives the ejector rod penetrating flange bearing (12), the U-shaped flange fixing piece (6), the upper sliding connecting plate (5), the translational heat insulation bottom cover (4), the Y-axis small guide rail (7), the ball sliding block (8) and the lower sliding connecting plate (9) to move along the X-axis direction together; when the external driving device moves along the Y-axis direction, the platform ejector rod (3) drives the ejector rod penetrating flange bearing (12), the U-shaped flange fixing piece (6), the upper sliding connecting plate (5), the translational heat insulation bottom cover (4) and the Y-axis small guide rail (7) to move along the Y-axis direction together.

4. The metal 3D printing objective table external drive high-temperature closed box according to claim 3, characterized in that the platform ejector rod (3) drives the ejector rod penetrating flange bearing (12) and the U-shaped flange fixing piece (6) to move in the elongated window in the middle of the lower sliding connection plate (9) when moving along the Y-axis direction.

5. The metal 3D printing objective table external drive high-temperature closed box as claimed in claim 1, characterized in that the upper surface of the translational heat insulation bottom cover (4) is slightly contacted with the outer lower surface of the bottom-opening high-temperature box body (13), and a layer of high-temperature heat insulation cotton is arranged on the upper surface of the translational heat insulation bottom cover (4) and can be well attached to the surface of the upper box body, so that heat cannot be dissipated from the bottom window (13-1) of the bottom-opening high-temperature box body (13).

6. The metal 3D printing objective table external drive high-temperature closed box according to claim 5, characterized in that the translational heat insulation bottom cover (4) is not directly connected with the bottom-opening window high-temperature box body (13), and the translational heat insulation bottom cover (4) is attached to the lower surface of the box body by matching the support height of the translational heat insulation bottom cover (4) with the installation height of the bottom-opening window high-temperature box body (13).

7. The metal 3D printing objective table external drive high-temperature closed box according to claim 6, characterized in that the size of the translational motion heat insulation bottom cover (4) is matched with the size of the bottom opening window (13-1) at the lower part of the bottom opening high-temperature box body (13), namely when the platform ejector rod (3) moves to the limit position along the X, Y axis direction, the translational motion heat insulation bottom cover (4) can still completely close the bottom opening window (13-1) at the lower part of the box body.

8. The metal 3D printing objective table external drive high-temperature closed box according to claim 7, characterized in that the platform ejector rod (3) slightly contacts with the hole wall when passing through the through hole in the center of the translational heat insulation bottom cover (4), when the platform ejector rod (3) moves along the three-axial direction to drive the translational heat insulation bottom cover (4) to move, the rod slightly contacts with the hole wall and is not stressed, and the movement of the translational heat insulation bottom cover (4) is sequentially stressed and transmitted by the ejector rod penetrating flange bearing (12), the U-shaped flange fixing piece (6) and the upper sliding connecting plate (5).

9. The metal 3D printing stage external drive high temperature enclosure of any of claims 1 to 8, wherein the lower end of the four support plate top leg (15) should be fixed on a stable base platform.

Technical Field

The invention relates to 3D printing or rapid prototyping manufacturing equipment, in particular to an externally-driven high-temperature closed box for a metal 3D printing objective table.

Background

3D printing or rapid prototyping manufacture is a hot research object in various advanced manufacturing fields in a convenient and rapid manufacturing form with special forming capability, and with the development of the technological level, the metal 3D printing technology which is a key technology is more and more concerned by scientific research institutions and industrial manufacturers and becomes a new and emerging manufacturing means.

At present, the metal 3D printing or rapid forming technology is mainly based on a laser heating source, in the forming process, a laser emitting head can not move generally in a sealed forming working space, and the aim of sintering and forming is achieved by changing the laser irradiation angle to enable a laser focusing point to move on a powder layer on a platform surface rapidly. Meanwhile, the whole process of metal laser 3D printing or rapid forming has low requirement on the space temperature, so that the moving mechanism of the laser head or the accumulation platform generally does not require the mechanism and the electric part of the moving mechanism to have higher high-temperature resistance.

Compared with the 3D printing technology of a laser heat source, the research on the 3D rapid forming technology of metal melting extrusion is less, no metal melting forming equipment which can be really used is available at present, one of the original reasons lies in that the forming environment condition required by the metal melting forming equipment is harsh, the main mechanical structure of the metal melting forming equipment generally needs to be immersed in a closed high-temperature environment, great inconvenience is brought to the mechanical structure design and the electrical design, the high-temperature resistance of the material needs to be considered, and meanwhile, the use of electrical elements in the high-temperature environment is avoided as much as possible.

Disclosure of Invention

Based on the problems faced by the metal melting extrusion 3D printing or rapid forming technology, the invention aims to provide the metal 3D printing objective table external drive high-temperature closed box.

The purpose of the invention is realized by the following technical scheme:

the embodiment of the invention provides an external drive high-temperature closed box of a metal 3D printing objective table, which comprises:

the device comprises a melting extrusion nozzle, a carrying platform, a platform ejector rod, a translational heat insulation bottom cover, an upper sliding connecting plate, a U-shaped flange fixing piece, a Y-axis small guide rail, a ball sliding block, a lower sliding connecting plate, an X-axis small guide rail, a large seat plate, an ejector rod penetrating flange bearing, a bottom-opening window high-temperature box body, a box body top foot and a seat plate top foot; wherein the content of the first and second substances,

the melting extrusion nozzle passes through and is fixed on a round hole at the top of the bottom-opening high-temperature box body, the center of the lower part of the object carrying platform is fixedly connected with the upper end of the platform ejector rod, the platform ejector rod passes through the round hole at the center of the translational heat-insulation bottom cover and passes through the ejector rod flange bearing, the lower end of the platform ejector rod passes through a large square hole in the middle of the large base plate, the lowest end of the platform ejector rod is fixedly connected with an external three-axial-driven sliding block mechanism, the translational heat-insulation bottom cover and the upper sliding connecting plate are fixedly connected with the bottom of the translational heat-insulation bottom cover through six flange feet of the upper sliding connecting plate, the lower part of the upper sliding connecting plate is fixedly connected with the U-shaped flange fixing piece, the ejector rod flange bearing is fixed in the round hole in the middle of the U-shaped flange fixing piece, two Y-axial small guide rails are parallelly installed at the lower part of the upper sliding connecting plate The fixed connection is realized, four ball sliding blocks are symmetrically fixed on the lower side surface of the lower sliding connection plate along the X-axis direction, the four ball sliding blocks are connected with the X-axis direction small guide rails in a sliding mode, the X-axis direction small guide rails are parallelly installed on two sides of a large square hole in the middle of the large base plate, four box top feet and the upper portion are arranged on the upper sides of four corners of the large base plate in a parallel mode, the bottom-opening-window high-temperature box body is fixedly connected with the large base plate, and four corner lower sides of the large base plate are fixed with an external platform through the four base plate top feet.

According to the technical scheme provided by the invention, the metal 3D printing objective table externally-driven high-temperature closed box provided by the embodiment of the invention has the advantages that after the lower end of the platform ejector rod is connected with the external triaxial driving slide block device, the platform ejector rod can be directly driven by the outside to freely move along the X, Y, Z axis direction, the platform ejector rod can freely lift along the Z axis direction after penetrating through the ejector rod flange bearing, and related mechanisms such as a U-shaped flange fixing piece, an upper sliding connecting plate, a lower sliding connecting plate and the like can be driven by the flange bearing along the X, Y axis direction, so that the translational heat-insulating cover plate and the objective platform at the upper end are finally driven to move in the same direction along with the platform ejector rod. Like this, when the molten metal extrudes with filiform from melting extrusion nozzle tip, objective platform is in proper position department below the nozzle, according to continuous horizontal motion under 3D printing system software control requirement, accomplish the one deck at melting extrusion nozzle and pile up the back, steerable objective platform descends, carry out the molten metal of new deck and pile up, finally reach the purpose of the inside platform triaxial motion of direct drive high temperature airtight box of outside 3 axial motion, box below window is in accurate airtight state all the time simultaneously, can be fine avoid the heat in the high temperature airtight box to scatter and disappear, guarantee the temperature stability in the case. The moving device has simple design and compact structure, does not need any mechanical transmission and electromechanical parts in the high-temperature closed box body, and can avoid the outward heat dissipation of the high-temperature closed box body, thereby meeting the requirement that the object platform can move in the high-temperature closed box body environment in the metal melting extrusion rapid forming method.

The metal melting extrusion head arranged in the high-temperature closed box body can be kept fixed on the upper portion of the box body, the objective platform can rapidly move in the high-temperature box body along the three spatial axes of X, Y and Z, heat in the high-temperature box body can not be dissipated, and the stability of the temperature in the box body is guaranteed.

Drawings

FIG. 1 is a schematic view of a partial cross-sectional structure of a high temperature enclosure according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view of the embodiment of the present invention in front;

FIG. 3 is a side view, partially in section, schematically illustrating an embodiment of the present invention;

in the figure:

the device comprises a 1-melting extrusion nozzle, a 2-carrying platform, a 3-platform ejector rod, a 4-translational heat insulation bottom cover, a 5-upper sliding connecting plate, a 6-U-shaped flange fixing piece, a 7-Y axial small guide rail, an 8-ball sliding block, a 9-lower sliding connecting plate, a 10-X axial small guide rail, a 11-large seat plate, a 12-ejector rod penetrating flange bearing, a 13-bottom window high-temperature box body, a 14-box body top foot and a 15-seat plate top foot.

Detailed Description

The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.

The invention discloses an external drive high-temperature closed box of a metal 3D printing objective table, which has the following preferred specific implementation modes:

as shown in fig. 1, 2 and 3, the device comprises:

the device comprises a melting extrusion nozzle 1, a carrying platform 2, a platform ejector rod 3, a translational heat insulation bottom cover 4, an upper sliding connecting plate 5, a U-shaped flange fixing piece 6, a Y-axis small guide rail 7, a ball sliding block 8, a lower sliding connecting plate 9, an X-axis small guide rail 10, a large seat plate 11, an ejector rod penetrating flange bearing 12, a bottom windowing high-temperature box body 13, a box body top foot 14 and a seat plate top foot 15; wherein the content of the first and second substances,

the melting extrusion nozzle 1 passes through and is fixed on a round hole at the top of a high-temperature box body 13 with a bottom window, the center of the lower part of a carrying platform 2 is fixedly connected with the upper end of a platform ejector rod 3, the platform ejector rod 3 passes through the round hole at the center of a translational heat insulation bottom cover 4 and passes through a large square hole in the middle of a large seat plate 11 after passing through an ejector rod flange bearing 12, the lowest end of the platform ejector rod 3 is fixedly connected with an external three-axial driven slide block mechanism, the translational heat insulation bottom cover 4 and an upper sliding connecting plate 5 are fixedly connected with the bottom of the translational heat insulation bottom cover 4 through six flange feet of the upper sliding connecting plate 5, the lower part of the upper sliding connecting plate 5 is fixedly connected with a U-shaped flange fixing part 6, the ejector rod flange bearing 12 is fixed in the round hole in the middle of the U-shaped flange fixing part 6, two Y-axial small guide rails 7 are parallelly arranged at the lower part, the downside of lower sliding connection board 9 is fixed with four ball sliders 8 along X axle direction symmetry, these four ball sliders 8 and the little guide rail 10 sliding connection of X axle, two little guide rail 10 parallel mount of X axle are in the both sides of big square hole in the middle of big bedplate 11, the four corners upside of big bedplate 11 is through four box footsteps 14 and top end windowing high temperature box 13 fixed connection, the four corners downside of big bedplate 11 is fixed with external platform through four bedplate footsteps 15.

The platform ejector rod 3 passes through a square window at the lower side of a bottom-opening high-temperature box body 13, a translational heat insulation bottom cover 4, a middle round hole of an upper sliding connecting plate 5 and a penetrating ejector rod flange bearing 12, and then the lowest end of the platform ejector rod is connected with an external driving device, so that the platform ejector rod can perform Z-axis lifting motion;

the platform ejector rod 3 is connected with an external driving device through the lowest end and can be driven by the external driving device to move along the plane of X, Y shaft directions, and at the moment, when the external driving device moves along the X shaft direction, the platform ejector rod 3 drives the ejector rod penetrating flange bearing 12, the U-shaped flange fixing piece 6, the upper sliding connecting plate 5, the translational heat insulation bottom cover 4, the Y shaft small guide rail 7, the ball sliding block 8 and the lower sliding connecting plate 9 to move along the X shaft direction; when the external driving device moves along the Y-axis direction, the platform ejector rod 3 drives the ejector rod penetrating flange bearing 12, the U-shaped flange fixing piece 6, the upper sliding connecting plate 5, the translational heat insulation bottom cover 4 and the Y-axis small guide rail 7 to move along the Y-axis direction;

when the platform ejector rod 3 moves along the Y-axis direction, the platform ejector rod drives the ejector rod penetrating flange bearing 12 and the U-shaped flange fixing piece 6 to move in the strip-shaped window in the middle of the lower sliding connecting plate 9;

the upper surface of the translational heat insulation bottom cover 4 is slightly contacted with the lower surface of the outer side of the bottom-opening high-temperature box body 13, and a layer of high-temperature heat insulation cotton is arranged on the upper surface of the translational heat insulation bottom cover 4, so that the translational heat insulation bottom cover can be well attached to the surface of an upper box body, and the heat can not be dissipated from a bottom window 13-1 of the bottom-opening high-temperature box body 13;

the translational heat insulation bottom cover 4 is not directly connected with the bottom-opening-window high-temperature box body 13, and the translational heat insulation bottom cover 4 is attached to the lower surface of the box body by matching the support height of the translational heat insulation bottom cover 4 with the installation height of the bottom-opening-window high-temperature box body 13;

the size of the translational heat insulation bottom cover 4 is matched with the size of a bottom-opened window 13-1 at the lower part of the bottom-opened high-temperature box body 13, namely when the platform ejector rod 3 moves to the limit position along the direction of the X, Y shaft, the translational heat insulation bottom cover 4 can still completely close the bottom-opened window 13-1 at the lower part of the box body;

when the platform ejector rod 3 penetrates through a through hole in the center of the translational heat-insulation bottom cover 4, the platform ejector rod 3 is in slight contact with the hole wall, when the platform ejector rod 3 moves along the three axial directions to drive the translational heat-insulation bottom cover 4 to move, the rod is in slight contact with the hole wall and is not stressed, and the movement of the translational heat-insulation bottom cover 4 is sequentially stressed and transmitted by an ejector rod penetrating flange bearing 12, a U-shaped flange fixing piece 6 and an upper sliding connecting plate 5;

the lower ends of the four support plate top legs 15 should be fixed on a stable base platform.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

As shown in fig. 1, fig. 2, and fig. 3, the metal 3D printing objective table external drive high-temperature closed box provided in this embodiment is a moving device applied to a metal melting and extruding method for 3D printing or rapid forming, and can directly drive and control 1 platform ejector rod by an external driving device moving in a three-axis direction to control a carrying platform below a 3D printing nozzle in a high-temperature closed box body, so that the carrying plane is located in the closed box body to perform plane motion and up-and-down lifting motion.

The method specifically comprises the following steps: the device comprises a melting extrusion nozzle 1, a carrying platform 2, a platform ejector rod 3, a translational heat insulation bottom cover 4, an upper sliding connecting plate 5, a U-shaped flange fixing piece 6, a Y-axis small guide rail 7, a ball sliding block 8, a lower sliding connecting plate 9, an X-axis small guide rail 10, a large seat plate 11, an ejector rod penetrating flange bearing 12, a bottom windowing high-temperature box body 13, a box body top foot 14 and a seat plate top foot 15; wherein, the melting extrusion nozzle 1 passes through and is fixed on a round hole at the top of a high-temperature box body 13 with a bottom window, the center of the lower part of a carrying platform 2 is fixedly connected with the upper end of a platform ejector rod 3, the platform ejector rod 3 passes through a round hole at the center of a translational heat insulation bottom cover 4 and passes through an ejector rod flange bearing 12, the lower end of the platform ejector rod passes through a large square hole at the middle of a large base plate 11, the lowest end of the platform ejector rod 3 is fixedly connected with an external three-axial driven slide block mechanism, the translational heat insulation bottom cover 4 and an upper sliding connecting plate 5 are fixedly connected with the bottom of the translational heat insulation bottom cover 4 through six flange feet, the lower part of the upper sliding connecting plate 5 is fixedly connected with a U-shaped flange fixing piece 6, the ejector rod flange bearing 12 is fixed in the round hole at the middle of the U-shaped flange fixing piece 6, two Y-axial small guide rails 7 are arranged in parallel at the lower, the downside of lower sliding connection board 9 is fixed with four ball sliders 8 along X axle direction symmetry, these four ball sliders 8 and the little guide rail 10 sliding connection of X axle, two little guide rail 10 parallel mount of X axle are in the both sides of big square hole in the middle of big bedplate 11, the four corners upside of big bedplate 11 is through four box footsteps 14 and top end windowing high temperature box 13 fixed connection, the four corners downside of big bedplate 11 is fixed with external platform through four bedplate footsteps 15.

The platform ejector rod 3 passes through a square window at the lower side of a bottom-opening high-temperature box body 13, a translational heat insulation bottom cover 4, a middle round hole of an upper sliding connecting plate 5 and a penetrating ejector rod flange bearing 12, and then the lowest end of the platform ejector rod is connected with an external driving device, so that the platform ejector rod can perform Z-axis lifting motion;

the platform ejector rod 3 is connected with an external driving device through the lowest end and can be driven by the external driving device to move in a plane along the direction of X, Y shafts, and at the moment, when the external driving device moves along the direction of the X shaft, the platform ejector rod 3 drives an ejector rod penetrating flange bearing 12, a U-shaped flange fixing piece 6, an upper sliding connecting plate 5, a translational heat insulation bottom cover 4, a Y-axis small guide rail 7, a ball sliding block 8 and a lower sliding connecting plate 9 to move along the direction of the X shaft; when the external driving device moves along the Y-axis direction, the platform ejector rod 3 drives the ejector rod penetrating flange bearing 12, the U-shaped flange fixing piece 6, the upper sliding connecting plate 5, the translational heat insulation bottom cover 4 and the Y-axis small guide rail 7 to move along the Y-axis direction;

when the platform ejector rod 3 moves along the Y-axis direction, the platform ejector rod drives the ejector rod penetrating flange bearing 12 and the U-shaped flange fixing piece 6 to move in the strip-shaped window in the middle of the lower sliding connecting plate 9;

the upper surface of the translational heat insulation bottom cover 4 is slightly contacted with the lower surface of the outer side of the bottom-opening high-temperature box body 13, and a layer of high-temperature heat insulation cotton is arranged on the upper surface of the translational heat insulation bottom cover 4, so that the translational heat insulation bottom cover can be well attached to the surface of an upper box body, and the heat can not be dissipated from a bottom window 13-1 of the bottom-opening high-temperature box body 13;

the translational heat insulation bottom cover 4 is not directly connected with the bottom-opening-window high-temperature box body 13, and the translational heat insulation bottom cover 4 is attached to the lower surface of the box body by matching the support height of the translational heat insulation bottom cover 4 with the installation height of the bottom-opening-window high-temperature box body 13;

the size of the translational heat insulation bottom cover 4 is matched with the size of a bottom-opened window 13-1 at the lower part of a bottom-opened high-temperature box body 13, namely when the platform ejector rod 3 moves to the limit position along the direction of the X, Y shaft, the translational heat insulation bottom cover 4 can still completely close the bottom-opened window 13-1 at the lower part of the box body;

when the platform ejector rod 3 penetrates through a through hole in the center of the translational heat-insulation bottom cover 4, the platform ejector rod 3 is in slight contact with the hole wall, when the platform ejector rod 3 moves along the three axial directions to drive the translational heat-insulation bottom cover 4 to move, the rod is in slight contact with the hole wall and is not stressed, and the movement of the translational heat-insulation bottom cover 4 is sequentially stressed and transmitted by an ejector rod penetrating flange bearing 12, a U-shaped flange fixing piece 6 and an upper sliding connecting plate 5;

the lower ends of the four support plate footsteps 15 should be fixed on a stable base platform.

The metal 3D printing objective table externally-driven high-temperature closed box can be placed in the high-temperature closed box body, and the objective table below the metal melting extrusion head can rapidly move along three spatial axes of X, Y and Z. The metal melting extrusion head is fixed above the inside of the closed box body, the carrying platform is arranged below the extrusion head and driven by the platform ejector rod to move along three directions of an X, Y, Z shaft, a window below the closed box body is covered and sealed by a translational heat insulation bottom cover capable of sliding in a plane, the platform ejector rod drives the translational heat insulation bottom cover to slide in the same direction under the direct drive of an external drive mechanism, the heat loss inside the high-temperature closed box body can be well avoided, and the temperature inside the box body is guaranteed to be stable. The dynamic quasi-sealing structure of the high-temperature closed box is ingenious in design and compact in structure, any transmission mechanism and electromechanical parts are not arranged in the high-temperature closed box, the three-axis controllable movement of the carrying platform is realized, and meanwhile, the outward heat dissipation of the high-temperature closed box can be avoided, so that the requirement of the metal melting extrusion rapid forming method for carrying out the controllable movement of the carrying platform under the environment of the high-temperature closed box is met.

With reference to fig. 1, fig. 2, and fig. 3, the working flow of the present invention is as follows: after the lower end of the platform ejector rod is connected with an external triaxial drive sliding block device, the platform ejector rod can be directly driven by the outside to freely move along the X, Y, Z-axis direction, the platform ejector rod penetrates through an ejector rod penetrating flange bearing and can freely lift along the Z-axis direction, and the flange bearing can drive related mechanisms such as a U-shaped flange fixing piece, an upper sliding connecting plate and a lower sliding connecting plate along the X, Y-axis direction, so that the translational heat insulation cover plate and a carrying platform at the upper end are finally driven to move in the same direction along with the platform ejector rod. Like this, when the molten metal extrudes with filiform from melting extrusion nozzle tip, objective platform is in proper position department below the nozzle, according to continuous horizontal motion under 3D printing system software control requirement, accomplish the one deck at melting extrusion nozzle and pile up the back, steerable objective platform descends, carry out the molten metal of new deck and pile up, finally reach the purpose of the inside platform triaxial motion of direct drive high temperature airtight box of outside 3 axial motion, box below window is in accurate airtight state all the time simultaneously, can be fine avoid the heat in the high temperature airtight box to scatter and disappear, guarantee the temperature stability in the case.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.