Small three-dimensional printing device with built-in print reservoir

Abstract

This invention relates to a small 3D printing device with a built-in printing magazine, comprising a bed assembly, a printing magazine, and a moving mechanism. The bed assembly includes a base and a turntable for workpiece processing, the turntable being disposed on the base. The printing magazine includes a tool magazine support and multiple printing units arranged side-by-side in a straight line on the tool magazine support. Each printing unit includes a fixing block and a print head with its output end facing downwards. The printing units and the moving mechanism are respectively disposed on opposite sides of the base and above the turntable. The moving mechanism includes a zero-point clamp, which includes a clamping unit and multiple positioning studs. The clamping unit has a clamping groove, and both the clamping groove and the positioning studs are arranged laterally. Each fixing block is connected to a positioning stud, so that the clamping unit clamps the positioning studs, and the moving mechanism drives the print head to move for workpiece processing. This invention effectively simplifies the tool changing process, reduces interference between components, reduces the tool changing stroke, and results in a compact overall structure.

Description

Technical Field

[0001] This invention relates to a small 3D printing device with a built-in printing library, belonging to the field of CNC equipment technology. Background Technology

[0002] Currently, most fused deposition modeling (FDM) 3D printers widely used in additive and subtractive manufacturing are three-axis structures, capable only of planar stacking and forming. This presents significant limitations when manufacturing workpieces with complex curved surfaces or inverted features. To address this, a few five-axis 3D printers have emerged, optimizing the printing path and forming quality by increasing rotational degrees of freedom. However, existing five-axis 3D printers generally employ a moving beam structure, integrating all motion axes and the print magazine into the same space. This results in a large overall machine size, and to avoid interference between the motion axes and the print magazine, the internal processing space often needs to be further expanded, making it difficult to meet customers' demands for compact and miniaturized equipment. Some machines place the print magazine on the outside of the protective enclosure, which can reduce interference between components to some extent and make the internal space more compact. However, an external print magazine increases the tool change stroke and tool change time, hindering improvements in production efficiency.

[0003] Meanwhile, to improve interlayer bonding or meet the molding requirements of specific materials, it is often necessary to heat the entire internal environment of the equipment. However, heating the entire internal space can lead to high energy consumption and slow temperature rise due to its large volume. Furthermore, the thermal deformation generated by heating directly affects precision moving parts such as guide rails and lead screws, which can easily cause a decrease in the positioning accuracy of the equipment. In addition, existing five-axis 3D printing equipment has large temperature fluctuations, and the processing effect is significantly affected by temperature. Summary of the Invention

[0004] This invention provides a small-scale 3D printing device with a built-in printing library, aiming to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a small-scale 3D printing device with a built-in printing library, which, through a reasonable layout and tool retrieval method, effectively simplifies the tool changing process, reduces interference between components, shortens the tool changing stroke, and results in a compact overall structure.

[0005] The technical solution of the present invention relates, in one aspect, to a small 3D printing device with a built-in printing library, comprising: The machine bed assembly includes a printing magazine and a moving mechanism. The machine bed assembly includes a base and a turntable for workpiece machining, with the turntable located in the center of the base. The printing magazine includes a tool magazine support and multiple printing units arranged side-by-side along a straight line on the tool magazine support. Each printing unit includes a fixing block and a print head with its output end facing downwards. The printing units and the moving mechanism are respectively located on opposite sides of the base and above the turntable. The moving mechanism includes a zero-point clamp, which includes a movable clamping unit and multiple positioning pull studs. The clamping unit has clamping slots for holding the positioning pull studs. Both the clamping slots and the positioning pull studs are arranged laterally. Each fixing block is connected to one positioning pull stud, so that the positioning pull studs are clamped by the clamping unit, and the moving mechanism drives the print head to move for workpiece machining.

[0006] Furthermore, the printing unit includes a material box, a fixing block, and a locking device. The material box is disposed on the upper side of the print head. The sides of the fixing block are connected to the material box and the print head. The fixing block is disposed on the locking device, which is disposed on the tool magazine bracket. The positioning pin is fixed to the fixing block.

[0007] Furthermore, the locking device includes a positioning component, which includes a connecting block, a first positioning block, and a second positioning block. The connecting block is fixed to the tool magazine bracket, the first positioning block is fixedly connected to the connecting block, and the second positioning block is fixedly connected to the fixing block. The second positioning block is provided with a groove, and the first positioning block is provided in a recess that allows it to be inserted into or removed from the groove.

[0008] Furthermore, the locking device also includes a mounting block and a locking shaft with a spring plunger. The mounting block is fixed to the connecting block or the tool magazine bracket. The end of the locking shaft away from the spring plunger is fixed to the fixing block. The mounting block is provided with a slot that allows the spring plunger to engage or disengage.

[0009] Furthermore, the locking device also includes a guide block and a positioning pin. The guide block is disposed on the mounting block, and the positioning pin is connected to the fixing block. The guide block is provided with a positioning groove that allows the positioning pin to be inserted or removed.

[0010] Furthermore, a sensing plate is provided on the fixed block, and a position detector for detecting the position of the sensing plate is provided on the guide block.

[0011] Furthermore, the printing library also includes a wire support assembly, which includes a wire channel, two clamps, and a support strip for connecting and fixing the power cord; the wire channel is fixed to the outer protection of the bed assembly; the two ends of the support strip are respectively connected to the two clamps, one of which is fixed to the material box and the other is fixed to the wire channel.

[0012] Furthermore, the print magazine also includes a waste container for placing raw materials that fall off the print head, the waste container being disposed on the tool magazine support.

[0013] Furthermore, the bed assembly also includes multiple heat insulation plates, which together form a processing cavity. The turntable is disposed within the processing cavity, and a telescopic door is provided on the upper side of the processing cavity to allow the zero-point fixture and the print head to enter and exit.

[0014] Furthermore, the moving mechanism includes a first moving device, a second moving device, and a third moving device for driving the zero-point clamp to move left and right, forward and backward, and up and down, respectively.

[0015] The beneficial effects of this invention are as follows.

[0016] This invention relates to a small 3D printing device with a built-in print library, which achieves high-precision five-axis 3D printing through a reasonable structural layout and functional differentiation. The invention employs a functional component partitioning layout, dividing the entire machine into a precision moving axis area, a constant-temperature processing chamber area, and an automatic head-changing area. This ensures that the three-axis moving components and key transmission mechanisms such as the turntable are located outside the heat insulation zone, effectively preventing heat conduction from the processing chamber to the precision components and reducing the adverse effects of thermal deformation on the positioning accuracy of the moving components. Simultaneously, the processing chamber area uses an independent heat insulation structure with independent heating function, achieving efficient and low-energy maintenance of the high-temperature environment required for the printing process, meeting the high-precision and high-stability requirements of five-axis 3D printing. The print head is built into the print library within the outer protective enclosure and arranged side-by-side. Combined with a zero-point fixture where positioning studs and clamping slots are horizontally positioned, it enables rapid and high-precision tool changing. Through a reasonable positional layout and tool retrieval method, the tool changing process is effectively simplified, interference between components is reduced, the tool changing stroke is shortened, and the overall structure is compact, achieving a miniaturized design with a built-in print library. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a front view of the overall structure according to an embodiment of the present invention.

[0018] Figure 2 This is a side view of the overall structure according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the processing cavity according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the protective mechanism according to an embodiment of the present invention.

[0021] Figure 5 This is a rear view of the structure of the printing library according to an embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the printing library according to an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of a printing unit according to an embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of the structure of the moving mechanism according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures: 100. Bed assembly; 110. Base; 120. Turntable; 121. Rotary arm; 122. Worktable; 130. Heat insulation plate; 140. Machining cavity; 150. PTC heater; 200. Protective mechanism; 210. Telescopic gate; 220. Mounting bracket; 230. Guide bracket; 240. Connecting frame; 250. Telescopic protection; 300. Print magazine; 310. Print head; 320. Tool magazine bracket; 321. Tool magazine support block; 330. Material box; 340. Fixing block; 341. Positioning pin; 342. Sensor plate; 343. Locking shaft; 350. Positioning assembly; 351. Connecting block; 352. First positioning block; 353. Second positioning block; 360. Mounting block; 370. Guide block; 371. Position detector; 380. Wire support assembly; 381. Wire trough; 382. Clamping plate; 383. Support bar; 390. Waste box; 400. Moving mechanism; 410. Zero-point clamp; 411. Positioning pin; 412. Connecting column; 413. Clamp base; 414. Clamping slot; 420. Tool setter; 430. First moving device; 431. Crossbeam; 440. Second moving device; 441. Slide; 450. Third moving device; 451. Saddle; 460. Tool setter. Detailed Implementation

[0026] The following will provide a clear and complete description of the concept, specific structure, and technical effects of the present invention in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0027] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," "right," "top," and "bottom" used in this invention are only relative to the relative positional relationships of the various components of the invention in the accompanying drawings.

[0028] Furthermore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and not for limiting the invention. The term "and / or" as used herein includes any combination of one or more of the associated listed items.

[0029] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various elements, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from one another. For example, without departing from the scope of this disclosure, a first element may also be referred to as a second element, and similarly, a second element may also be referred to as a first element.

[0030] See Figures 1 to 8The present invention discloses a small 3D printing device with a built-in printing library, comprising a bed assembly 100, a protective mechanism 200, a printing library 300, and a moving mechanism 400. The bed assembly 100 includes a base 110, a turntable 120, and multiple heat insulation plates 130, both of which are mounted on the base 110. The multiple heat insulation plates 130 surround a processing cavity 140, and a rotating arm 121 of the turntable 120 for placing workpieces is disposed within the processing cavity 140. The protective mechanism 200 is disposed above the processing cavity 140 and includes a telescopic door 210 for closing or opening the processing cavity 140. The printing library 300 is disposed within the processing cavity 140. The outside of the processing cavity 140; the printing chamber 300 is provided with multiple print heads 310 for performing workpiece processing; the moving mechanism 400 is located outside the processing cavity 140, and the moving mechanism 400 includes a zero-point clamp 410 for holding the print heads 310; the zero-point clamp 410 is movably located above the telescopic gate 210; wherein, when in the workpiece processing state, the telescopic gate 210 opens the processing cavity 140 to allow the zero-point clamp 410 to drive the print heads 310 into the processing cavity 140 for workpiece processing; when in the material changing state, the telescopic gate 210 closes the processing cavity 140, and the print heads 310 and the zero-point clamp 410 are outside the processing cavity 140.

[0031] This invention's small 3D printing device with a built-in printing library achieves high-precision five-axis 3D printing through a rational structural layout and functional differentiation. The invention employs a functional component partitioning layout, dividing the entire machine into a precision moving axis area, a constant-temperature processing chamber 140 area, and an automatic head-changing area. This allows key transmission mechanisms such as the three-axis moving components and the turntable 120 to be located outside the heat-insulated area, effectively preventing heat conduction from the processing chamber 140 to the precision components and effectively reducing the adverse effects of thermal deformation on the positioning accuracy of the moving components. Simultaneously, the processing chamber 140 area uses independent heat insulation and has independent heating functions, enabling efficient and low-energy maintenance of the high-temperature environment required for the printing process, thus meeting the high-precision and high-stability requirements of five-axis 3D printing.

[0032] In some embodiments of the present invention, see Figure 1 and Figure 3The bed assembly 100 includes multiple heat insulation plates 130, which enclose a machining cavity 140. Machining the workpiece within the relatively small machining cavity 140, enclosed by the heat insulation plates 130, helps maintain a stable machining environment temperature and effectively reduces energy consumption compared to traditional large-area heating systems. Furthermore, one of the heat insulation plates 130 has a perforation. The body of the turntable 120 is located outside the machining cavity 140, and the rotating arm 121 of the turntable 120 passes through the perforation to reach the machining cavity 140, thereby reducing the impact of temperature on the turntable 120 body. Furthermore, the machining cavity 140 is equipped with a PTC heater 150 to provide the required machining temperature, thus providing independent heating to meet the temperature requirements of different raw materials.

[0033] See Figure 1 and Figure 2 Multiple heat insulation plates 130 and a crossbeam 431 of a moving mechanism 400 are respectively mounted on a base 110, with the heat insulation plates 130 positioned in front of the crossbeam 431. At least four heat insulation plates 130 serve as the bottom plate, left side plate, right side plate, and rear side plate of the processing cavity 140, respectively. The front of the processing cavity 140 is covered with an outer protective cover, and the upper side of the processing cavity 140 is covered with a protective mechanism 200. The bottom plate is fixed to the upper surface of the base 110. The rear side plate is positioned in front of the crossbeam 431, and its lower edge is connected to the rear edge of the bottom plate. The left side... The rear and lower sides of the plate are connected to the left side of the rear plate and the left side of the bottom plate, respectively. The rear and lower sides of the right side plate are connected to the right side of the rear plate and the right side of the bottom plate, respectively. The rear plate is provided with a perforation. The rotating arm 121 of the turntable 120 passes through the perforation to reach the processing cavity 140, thereby forming a relatively closed independent processing cavity 140 with a small space. Through the heat insulation effect of the heat insulation plate 130, the temperature inside the processing cavity 140 is relatively stable and can be maintained with low energy consumption. This provides a stable temperature environment for the additive processing of the workpiece on the turntable 120, which is beneficial to improving the workpiece forming effect and reducing the overall energy consumption.

[0034] Further, see Figure 3The processing chamber 140 is equipped with a PTC heater 150. The system controls the PTC heater 150 to bring the processing chamber 140 to the required processing temperature. This provides an independent heating function within the processing chamber 140, allowing for individual temperature increases and maintenance to meet various processing needs. Since the moving parts and the printing chamber 300 are located outside the processing chamber 140, the maximum temperature of the processing chamber 140 can reach 60 degrees Celsius. Specifically, the body of the PTC heater 150 is located on the outer side of the processing chamber 140. Air holes are provided on the heat insulation plate 130 on the side. The heating end of the PTC heater 150 is attached to the outer side of the heat insulation plate 130 and aligned with the air holes, allowing the heat generated by the PTC heater 150 to enter the processing chamber 140 through the air holes. Furthermore, two PTC heaters 150 are provided. Air holes are provided on both the left and right heat insulation plates 130, and the heating ends of the two PTC heaters 150 are respectively attached to the air holes on the heat insulation plates 130 on both sides.

[0035] In some embodiments of the present invention, see Figure 3 and Figure 4 The moving mechanism 400 includes a first moving device 430, a second moving device 440, and a third moving device 450. The first moving device 430, the second moving device 440, and the third moving device 450 can respectively drive the zero-point fixture 410 to move left and right, forward and backward, and up and down. Further, the crossbeam 431 of the first moving device 430 is fixedly mounted on the upper side of the base 110 and positioned behind the processing cavity 140. The slide 441 of the second moving device 440 is movably mounted on the upper side of the crossbeam 431. The saddle 451 of the third moving device 450 is movably mounted on the upper side of the slide 441. The zero-point fixture 410 is movably mounted on the side of the saddle 451 facing the printing chamber 300. Compared with the traditional moving beam type moving structure, this invention, by changing the structure of the three-axis moving device of the moving mechanism 400 and coordinating the positional design of the processing cavity 140 and the printing chamber 300, can achieve overall machine miniaturization.

[0036] Specifically, the telescopic gate 210 of the protective mechanism 200 is located at the upper opening of the processing cavity 140, and the rotating arm 121 of the turntable 120 is located inside the processing cavity 140 and below the telescopic gate 210. The rotating arm 121 is equipped with a worktable 122 for carrying the workpiece, and the rotating arm 121 can drive the worktable 122 to rotate along axes B and C. The first moving device 430, the second moving device 440, and the third moving device 450 of the moving mechanism 400 can respectively drive the zero-point clamp 410 along... The X, Y, and Z axes move. When the telescopic door 210 retracts and opens the processing chamber 140, the moving mechanism 400 drives the zero-point fixture 410 through the telescopic door 210 into the processing chamber 140. The zero-point fixture 410 is driven to move along the three axes by the first moving device 430, the second moving device 440, and the third moving device 450. The rotating arm 121 drives the worktable 122 to move along the B and C axes, so that the raw materials on the zero-point fixture 410 can be printed into workpieces of various complex shapes.

[0037] In some specific embodiments of the present invention, see Figure 3 and Figure 4 The first moving device 430 includes a crossbeam 431, a first motor, and a first lead screw. The crossbeam 431 is fixedly mounted on the base 110 and located behind the processing cavity 140. The first motor and the first lead screw are located on the upper side of the crossbeam 431. The second moving device 440 is movably mounted on the upper side of the crossbeam 431 via a first guide rail and a first slider. The first lead screw is fixedly connected to the second moving device 440, and the rotation shaft of the first motor is connected to the first lead screw, so that the second moving device 440 can be moved left and right by the first motor.

[0038] Further, see Figure 3 and Figure 4 A first recess is provided on the lower side of the crossbeam 431, and the body of the turntable 120 is disposed within the first recess. The rotating arm 121 is disposed on the front side of the turntable 120 body. The rotating arm 121 passes through the perforation of the rear side plate of the machining cavity 140 and enters the machining cavity 140, thereby effectively reducing the impact of temperature on the moving parts and making the overall structure more compact. It can be understood that the crossbeam 431 and the heat insulation plate 130 located on the rear side of the machining cavity 140 are spaced apart, thereby further reducing the impact of the temperature of the machining cavity 140 on the first moving device 430.

[0039] In some specific embodiments of the present invention, see Figure 3 and Figure 4The second moving device 440 includes a slide plate 441, a second motor, and a second lead screw. The slide plate 441 is movably mounted on the crossbeam 431, and the second motor and the second lead screw are mounted on the upper side of the slide plate 441. The third moving device 450 is movably mounted on the upper side of the slide plate 441 via a second guide rail and a second slider. The second lead screw is fixedly connected to the third moving device 450, and the rotation shaft of the second motor is connected to the second lead screw, so that the second motor can drive the third moving device 450 to move back and forth, and the second moving device 440 can move left and right with the slide plate 441.

[0040] In some specific embodiments of the present invention, see Figure 3 and Figure 4 The third moving device 450 includes a saddle 451, a third motor, and a third lead screw. The saddle 451 is movably mounted on the slide plate 441, and the third motor and the third lead screw are located on the front side of the saddle 451. The zero-point clamp 410 is movably mounted on the front side of the saddle 451 via a third guide rail and a third slider. The third lead screw is fixedly connected to the zero-point clamp 410, and the rotating shaft of the third motor is connected to the third lead screw, so that the third motor can drive the zero-point clamp 410 to move up and down. The third moving device 450 and the zero-point clamp 410 can move back and forth with the saddle 451 and can move left and right with the slide plate 441.

[0041] In some specific embodiments of the present invention, see Figure 3 and Figure 4 The zero-point fixture 410 includes a connecting post 412, a fixture base 413, a clamping unit, and a positioning pull stud. The upper side of the connecting post 412 is fixedly connected to the third slider and the third lead screw, and the lower side of the connecting post 412 is connected to the upper side of the fixture base 413. The clamping unit is disposed in the receiving groove of the fixture base 413. The clamping groove of the clamping unit is arranged horizontally and the opening faces the printing magazine 300. The positioning pull stud is disposed on the printing magazine 300 and fixedly connected to the print head 310 of the printing magazine 300. When the moving mechanism 400 drives the clamping unit to move toward the printing magazine 300, the positioning pull stud can be inserted into the clamping groove, so that the positioning pull stud and the print head 310 can move together with the clamping unit. The moving mechanism 400 drives the zero-point fixture 410 and the print head 310 to move into the processing cavity 140. Furthermore, the connecting column 412 in the third moving device 450 for Z-axis movement is made of granite, thereby enabling rapid and high-precision switching of the print head 310 by using granite components in conjunction with the zero-point clamp 410. By employing the zero-point clamp 410 and horizontally arranging the clamping groove and positioning pins, this invention allows the moving mechanism 400 and the print magazine 300 to be respectively positioned on the rear and front sides above the base 110. This fully utilizes vertical space, effectively reducing the overall machine footprint and minimizing interference between tool changing and machining operations.

[0042] It should be noted that the clamping unit of the present invention adopts the existing zero-point clamp 410 mother structure. The clamping unit is equipped with a clamping drive device and multiple steel balls. The multiple steel balls are evenly arranged along the circumference of the clamping groove. When the positioning pull stud is inserted into the clamping groove, the multiple steel balls move radially inward under the action of the clamping drive device, clamping the outer circumference of the positioning pull stud and locking the positioning pull stud in the preset position, thereby achieving high-precision repeatable positioning.

[0043] In some embodiments of the present invention, the printing magazine 300 includes a tool magazine support 320 and multiple printing units. The tool magazine support 320 is disposed on the side of the telescopic door 210 facing away from the moving mechanism 400, and the multiple printing units are disposed on the tool magazine support 320 and arranged side by side along a straight line. See also Figure 2 and Figure 4 The tool magazine bracket 320 is fixed to the protective mechanism 200 and positioned in front of the telescopic port. Multiple printing units are arranged side-by-side in a straight line along the first axis, i.e., the X-axis, enabling the printing of various raw materials while making the overall space layout more compact, meeting the space requirements of small five-axis equipment. Furthermore, two tool magazine support blocks 321 are connected to both sides of the tool magazine bracket 320. Specifically, the two tool magazine support blocks 321 are respectively positioned on the outside of both sides of the processing cavity 140. The tool magazine bracket 320 is horizontally positioned along the X-axis. The upper ends of the tool magazine support blocks 321 are connected to the ends of the tool magazine bracket 320, and the lower ends of the two tool magazine support blocks 321 are connected to the left and right sides of the base 110, respectively, allowing the printing magazine 300 to be positioned above and in front of the processing cavity 140.

[0044] In some embodiments of the present invention, the printing unit includes a material box 330, a print head 310, a fixing block 340, and a locking device. A connecting block 351 is fixed to a tool magazine bracket 320. A first positioning block 352 is fixedly connected to the connecting block 351, and a second positioning block 353 is fixedly connected to the fixing block 340. The second positioning block 353 has a groove, and the first positioning block 352 has a protrusion that allows insertion into or removal from the groove. See also... Figure 2 , Figure 5 and Figure 6 The material box 330 is located above the print head 310. The upper and lower ends of the same side of the fixing block 340 are connected to the material box 330 and the print head 310, respectively. The fixing block 340 is mounted on a locking device, which is mounted on the tool magazine bracket 320. A positioning pin 411 is fixed to the rear side of the fixing block 340, thereby clamping the positioning pin 411 through a clamping unit. This allows the moving mechanism 400 to drive the material box 330 and the print head 310 to the worktable 122 of the rotating arm 121, and the print head 310 to eject raw materials from the material box 330 for additive manufacturing of the workpiece. Furthermore, a liquid level sensor can detect the volume of raw materials in the material box 330 to allow for timely replacement of the material box 330.

[0045] In some specific embodiments of the present invention, see Figure 5 The print magazine 300 is also equipped with a waste container 390, which is used to collect waste raw materials that fall off the print head 310. Specifically, the waste container 390 is set on the blade magazine bracket 320 and between two fixing blocks 340. When the fixing blocks 340 are fixed to the blade magazine bracket 320, the waste container 390 is located below the output end of the print head 310, so that the waste raw materials falling off the print head 310 can fall directly into the waste container 390, thereby effectively preventing the waste raw materials from polluting the internal space of the equipment.

[0046] In some specific embodiments of the present invention, see Figure 5 The locking device includes a positioning component 350, which includes a connecting block 351, a first positioning block 352, and a second positioning block 353. The connecting block 351 is fixed to the tool magazine bracket 320, the first positioning block 352 is fixed to the connecting block 351, and the second positioning block 353 is fixedly connected to the fixing block 340. The first positioning block 352 is provided with a protrusion, and the second positioning block 353 is provided with a groove that matches the shape of the protrusion. The protrusion can be inserted into or removed from the groove, thereby completing the positioning of the print head 310 in the print magazine 300. Specifically, the protrusion has an inverted V-shaped structure, and the groove has a matching V-shaped structure. When the current print head 310 needs to be removed, the clamping unit clamps the positioning pin 411 and drives the fixing block 340 and the second positioning block 353 to move horizontally backward. The protrusion translates and disengages from the groove, so that the current print head 310 leaves the print magazine 300. After the current print head 310 completes the current process, the zero-point fixture 410 drives the second positioning block 353 to the rear of the first positioning block 352 and aligns it, so that the protrusion translates and embeds into the groove, and the current print head 310 is put back into the print magazine 300.

[0047] In some specific embodiments of the present invention, see Figure 7 The locking device also includes a mounting block 360 and a locking shaft 343 with a spring plunger. The mounting block 360 is fixed to the connecting block 351 or the tool magazine bracket 320. For example, the mounting block 360 is fixed to the connecting block 351. The end of the locking shaft 343 away from the spring plunger is fixed to the fixing block 340. The mounting block 360 is provided with a slot that allows the spring plunger to engage or disengage. Thus, the print head 310 is effectively locked by the locking shaft 343 with the spring plunger, while making the overall structure of the print magazine 300 compact and space-saving.

[0048] See Figure 6 and Figure 7The lower rear side of the mounting block 360 is connected to the front side of the connecting block 351. The upper side of the mounting block 360 protrudes from the connecting block 351. The slot is set on the upper side of the mounting block 360 and the opening faces the rear. One end of the locking shaft 343 is fixed to the front side of the fixing block 340. There are two spring plungers. The two spring plungers are respectively set on the opposite sides of the locking shaft 343, so that the locking end of the locking shaft 343 forms a T-shaped structure. The slot is a corresponding T-shaped structure or V-shaped structure. Specifically, when the moving mechanism 400 moves the fixed block 340 forward, the locking shaft 343 can enter the slot under the action of the positioning component 350. The two spring plungers are deformed by the slot arm, allowing the locking shaft 343 to move further forward. When the spring plungers reach the wider part of the slot, the spring plungers unfold due to the reduced pressure, and the locking shaft 343 is locked onto the mounting block 360, fixing the print head 310 to the blade magazine bracket 320. When it is necessary to remove the print head 310, the moving mechanism 400 moves the fixed block 340 backward. The spring plungers deform again under the pressure of the slot wall, allowing the locking shaft 343 to move further backward, thereby disengaging the locking shaft 343 from the slot. The moving mechanism 400 then removes the print head 310 from the print magazine 300.

[0049] In some specific embodiments of the present invention, see Figure 6 The locking device includes a guide block 370 and a positioning pin 341. A mounting block 360 is fixed to a connecting block 351 or a tool magazine holder 320. The guide block 370 is disposed on the mounting block 360. The positioning pin 341 is connected to a fixed block 340. The guide block 370 has a positioning groove that allows the positioning pin 341 to insert or disengage. Specifically, the mounting block 360 is located in front of the connecting block 351. The rear side of the mounting block 360 is fixedly connected to the front side of the connecting block 351, or the lower side of the mounting block 360 is connected to the tool magazine holder 320. The guide block 370 is located on top of the mounting block 360, and the positioning groove is located on top of the guide block 370, which is also located in front of the fixed block 340.

[0050] In some specific embodiments of the present invention, see Figure 2 , Figure 5 and Figure 8Both the positioning slot and the positioning pin 341 are arranged laterally. The connecting end of the positioning pin 341 is fixed to the front side of the fixing block 340, and the insertion end of the positioning pin 341 allows insertion into the positioning slot, so that the printing unit is fixed to the tool magazine holder 320. It is understood that a position detector 371, such as a proximity switch, is provided on the guide block 370, and a sensing plate 342 is provided on the fixing block 340. The relative position of the positioning pin 341 and the positioning slot of the guide block 370 is obtained through feedback from the proximity switch, thereby determining the position of the print head 310 and the fixing block 340 in the tool magazine holder 320. Furthermore, the proximity switch is fixed to the guide block 370 and positioned above the positioning slot, and the sensing plate 342 is fixed to the fixing block 340 and positioned in front of the fixing block 340. When the positioning pin 341 enters the positioning slot, the sensing plate 342 is positioned in front of the detection end of the proximity switch to detect the depth of the positioning pin 341 inserted into the positioning slot.

[0051] Specifically, the width of the positioning groove is slightly larger than the diameter of the positioning pin 341, and the outer side of the insertion end of the positioning pin 341 is provided with a tapered portion whose diameter gradually decreases outward. This tapered portion guides the positioning pin 341 smoothly into the groove. When processing is required using the current print head 310, the clamping unit clamps the positioning pull stud and translates the fixing block 340 and the print head 310 backward, causing the positioning pin 341 to translate and disengage from the positioning groove. When the print head 310 finishes processing the workpiece and needs to be returned to the print magazine 300, the moving mechanism 400 drives the fixing block 340 and the print head 310 away from the processing cavity 140 and to the tool magazine bracket 320. The moving mechanism 400 adjusts the position of the fixing block 340 so that the protrusion of the first positioning block 352 is embedded in the groove of the second positioning block 353 and the protrusion contacts the inner wall of the groove. The moving mechanism 400 continues to push the fixing block 340 and the print head 310 outward so that the positioning pin 341 is inserted into the positioning groove. After the positioning pin 341 is moved into the set position of the positioning groove according to the feedback of the proximity switch, the clamping unit releases the positioning pull pin, and the print head 310 is returned to the print magazine 300.

[0052] In some embodiments of the present invention, see Figure 2 , Figure 5 and Figure 6The printing library 300 also includes a wire support assembly 380, which includes a wire channel 381, two clamps 382, ​​and a support strip 383 for connecting and fixing the power cord. The wire channel 381 is fixed to the outer protection of the bed assembly 100. The two ends of the support strip 383 are respectively connected to the two clamps 382, ​​one of which is fixed to the material box and the other is fixed to the wire channel 381. Specifically, multiple wire support assemblies 380 are provided, each wire support assembly 380 is used to connect a print head 310. The wire groove 381 is fixed inside the front side of the outer protection. Multiple clamping plates 382 are arranged side by side along the X-axis on the wire groove 381 and above the corresponding print head 310. The power cord of the print head 310 is fixed on the support bar 383. The support bar 383 is made of a flexible material with a certain rigidity, so that the support bar 383 can form an arc shape in the air by its own rigidity, which plays the role of supporting and guiding the power cord. At the same time, when the moving part drives the print head 310 to move, the support bar 383 can deform accordingly to avoid the power cord being pulled off. And when the force of the moving part disappears, the support bar 383 can return to its original shape. Thus, without increasing the structural complexity, the space between the moving part and the print magazine 300 is fully utilized to realize the connection of the power cord of the print head 310. Compared with the traditional method of relying on the bed component for wiring, it can effectively simplify the structure and improve the overall structural compactness.

[0053] See Figures 1 to 8 The small 3D printing device with a built-in printing library of the present invention includes a bed assembly 100, a printing library 300, and a moving mechanism 400. The bed assembly 100 includes a base 110 and a turntable 120 for workpiece processing, with the turntable 120 disposed in the middle of the base 110. The printing library 300 includes a tool magazine support 320 and multiple printing units, which are arranged side by side along a straight line on the tool magazine support 320. Each printing unit includes a fixing block 340 and a print head 310 with the output end facing downwards. The printing units and the moving mechanism 400 are respectively disposed on opposite sides of the base 110 and are positioned within a certain range. Above the turntable 120, the moving mechanism 400 includes a zero-point clamp 410, which includes a movable clamping unit and multiple positioning pull studs. The clamping unit is provided with a clamping groove 414 for clamping the positioning pull studs. Both the clamping groove 414 and the positioning pull studs are arranged laterally. Each fixing block 340 is connected to a positioning pull stud so that the positioning pull studs are clamped by the clamping unit. Then, the moving mechanism 400 drives the print head 310 to move for workpiece processing. Thus, the print library 300 can be set up in a small and compact 3D printing device, and a fast and high-precision tool changing operation can be completed in the narrow internal space of the machine tool.

[0054] Specifically, the bed assembly 100 includes an outer protective layer, within which the base 110, turntable 120, moving mechanism 400, and print magazine 300 are all housed. Because the output end of the print head 310 faces downwards, and the positioning pins and clamping slots are arranged laterally, compared to traditional downward-facing positioning pins and clamping slots, interference between the printing unit and the moving mechanism 400 is effectively reduced. This allows the printing unit and the moving mechanism 400 to be positioned on opposite sides of the base 110, reducing the required distance between them. Furthermore, both are positioned above the turntable 120 used for workpiece processing, fully utilizing the space above the turntable 120, effectively reducing the overall machine footprint, and eliminating the need for other components between the printing unit and the moving mechanism 400, thus effectively shortening the tool change stroke. Furthermore, for the locking device of the small 3D printing equipment, a locking shaft 343 with a spring plunger is used in conjunction with a positioning assembly 350 and a guide assembly. In addition, the bed assembly 100 also includes multiple heat insulation plates 130. The multiple heat insulation plates 130 surround and form a processing cavity 140 for workpiece processing. The turntable 120 is set in the processing cavity 140. A telescopic door 210 is provided on the upper side of the processing cavity 140 to allow the zero-point fixture 410 and the print head 310 to enter and exit. This forms an independent processing cavity 140 with heat insulation function, which is beneficial to maintain a constant temperature in the workpiece processing environment and reduce the impact of temperature on the moving parts placed in the processing cavity 140.

[0055] In some embodiments of the present invention, the bed assembly 100 includes an outer protective structure. The protective mechanism 200 includes two mounting brackets 220, two guide brackets 230, and a telescopic unit. The two mounting brackets 220 are respectively fixed to the inner walls of opposite sides of the outer protective structure. The two ends of the guide brackets 230 are respectively connected to the two mounting brackets 220. One guide bracket 230 is disposed between the moving mechanism 400 and the printing chamber 300, and the other guide bracket 230 is disposed on the side of the printing chamber 300 facing away from the moving mechanism 400. The opposite ends of the telescopic unit are respectively connected to the middle of the two guide brackets 230. Further, the telescopic unit includes a connecting frame 240 and two telescopic guards 250. The telescopic door 210 is movably disposed in the connecting frame 240. The two sides of the telescopic guards 250 are respectively connected to the two guide brackets 230, and the telescopic ends of the two telescopic guards 250 are respectively connected to the opposite sides of the connecting frame 240.

[0056] See Figure 2 and Figure 4Two mounting brackets 220 are fixed to the left and right sides of the outer protection, respectively. Guide brackets 230 are arranged along the X-axis. One guide bracket 230 can be fixed to the outside of the crossbeam 431, and the other guide bracket 230 can be fixed to the front side wall of the outer protection. Both ends of each guide bracket 230 are connected to the two mounting brackets 220. Furthermore, the middle part of the mounting bracket 220 can be fixedly connected to the tool magazine support block 321 to further increase the structural reliability. Thus, without increasing the structural complexity, the stability of the guide bracket 230 can be effectively guaranteed. In addition, a telescopic door 210 can be added in the narrow internal space of the equipment to achieve effective isolation.

[0057] Specifically, the front and rear sides of the telescopic guard 250 are connected to two guide brackets 230 respectively, and the telescopic ends of the telescopic guard 250 can extend and retract along the X-axis. The telescopic ends of the two telescopic guards 250 are connected to the left and right sides of the connecting frame 240 respectively, thereby driving the connecting frame 240 and the telescopic door 210 to move left and right along the X-axis, and adjusting the position of the telescopic door 210 on the upper side of the processing cavity 140 according to processing requirements. Furthermore, the inner wall of the connecting frame 240 is connected to the left and right sides of the telescopic door 210, and the telescopic door 210 can move relative to the connecting frame 240 to open or close the processing cavity 140, thereby making full use of the space between the moving mechanism 400 and the printing chamber 300. By adding a small protective door, the influence of the temperature of the processing cavity 140 on the moving mechanism 400 is effectively prevented.

[0058] A specific embodiment is described here. See [link to documentation]. Figures 1 to 8The moving mechanism 400 drives the clamping unit to move, aligning its clamping groove with the positioning rivet. The moving mechanism 400 then moves the clamping unit forward, causing the positioning rivet to engage in the clamping groove. Next, the moving mechanism 400 moves the clamping unit backward, disengaging the locking shaft 343 from the mounting block 360's slot. After completing the tool removal operation, the moving mechanism 400 drives the print head 310 to the top of the telescopic gate 210. The telescopic gate 210 retracts, opening the processing chamber 140. The moving mechanism 400 then moves the print head 310 downward into the processing chamber 140, reaching the worktable 122 of the rotating arm 121. The output end of the print head 310 faces the worktable 122 and ejects raw material. Based on the workpiece shape, the moving mechanism 400 drives the print head 310 to perform three-axis movement, while the rotating arm 121 drives the worktable 122 to move along the BC axes, thus performing additive manufacturing on the workpiece. After the current process is completed, the moving mechanism 400 moves the print head 310 upward and away from the processing chamber 140. The telescopic door 210 extends out of the closed processing chamber 140. The moving mechanism 400 moves the print head 310 to the front of the tool magazine bracket 320. Under the guidance of the first positioning block 352 and the second positioning block 353 of the positioning component 350, the positioning pin 341 enters the positioning groove of the guide block 370. Then, the locking shaft 343 enters the slot of the mounting block 360. According to the position of the sensing plate 342 detected by the position detector 371, after the spring plunger of the locking shaft 343 reaches the set position of the slot, the clamping unit releases the positioning pull pin. The moving mechanism 400 moves the clamping unit backward. At the same time, under the action of the locking shaft 343, the print head 310 and the fixing block 340 remain stationary, so that the positioning pull pin disengages from the clamping groove, completing the tool release operation.

[0059] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the above-described embodiments. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this disclosure, as long as they achieve the same technical effects, should be included within the scope of protection of this disclosure and fall under the protection scope of the present invention. Within the protection scope of the present invention, the technical solutions and / or implementation methods can have various modifications and variations.

Claims

1. A small 3D printing device with a built-in print library, characterized in that, include: The machine bed assembly (100), the printing magazine (300), and the moving mechanism (400) are provided. The machine bed assembly (100) includes a base (110) and a turntable (120) for workpiece machining, the turntable (120) being located in the middle of the base (110). The printing magazine (300) includes a tool magazine support (320) and multiple printing units, the multiple printing units being arranged side by side along a straight line on the tool magazine support (320). Each printing unit includes a fixing block (340) and a print head (310) with the discharge end facing downwards. The printing units and the moving mechanism (400) are respectively located on the base (100, 300, and 400). The moving mechanism (400) includes a zero-point clamp (410), which includes a movable clamping unit and a plurality of positioning rivets. The clamping unit is provided with a clamping groove (414) for clamping the positioning rivets. The clamping groove (414) and the positioning rivets are both arranged laterally. Each fixed block (340) is connected to a positioning rivet so that the positioning rivet is clamped by the clamping unit, and then the moving mechanism (400) drives the print head (310) to move to perform workpiece processing.

2. The small 3D printing device with a built-in printing library according to claim 1, characterized in that, The printing unit includes a material box (330), a fixing block (340), and a locking device. The material box (330) is located on the upper side of the print head (310). The sides of the fixing block (340) are connected to the material box (330) and the print head (310). The fixing block (340) is located on the locking device, which is located on the tool magazine bracket (320). The positioning pin (411) is fixed on the fixing block (340).

3. The small 3D printing device with a built-in printing library according to claim 2, characterized in that, The locking device includes a positioning component (350), which includes a connecting block (351), a first positioning block (352), and a second positioning block (353). The connecting block (351) is fixed to the tool magazine bracket (320). The first positioning block (352) is fixedly connected to the connecting block (351), and the second positioning block (353) is fixedly connected to the fixing block (340). The second positioning block (353) is provided with a groove, and the first positioning block (352) is provided in a recess that allows it to be inserted into or removed from the groove.

4. The small 3D printing device with a built-in printing library according to claim 3, characterized in that, The locking device further includes a mounting block (360) and a locking shaft (343) with a spring plunger. The mounting block (360) is fixed to the connecting block (351) or the tool magazine bracket (320). The end of the locking shaft (343) away from the spring plunger is fixed to the fixing block (340). The mounting block (360) is provided with a slot that allows the spring plunger to engage or disengage.

5. The small 3D printing device with a built-in printing library according to claim 4, characterized in that, The locking device further includes a guide block (370) and a positioning pin (341). The guide block (370) is disposed on the mounting block (360), and the positioning pin (341) is connected to the fixing block (340). The guide block (370) is provided with a positioning groove that allows the positioning pin (341) to be inserted or removed.

6. The small 3D printing device with a built-in printing library according to claim 5, characterized in that, The fixed block (340) is provided with a sensing plate (342), and the guide block (370) is provided with a position detector (371) for detecting the position of the sensing plate (342).

7. The small 3D printing device with a built-in printing library according to claim 2, characterized in that, The printing chamber (300) also includes a wire support assembly (380), which includes a wire channel (381), two clamps (382), and a support strip (383) for connecting and fixing the power cord. The wire channel (381) is fixed to the outer protection of the bed assembly (100). The two ends of the support strip (383) are connected to the two clamps (382), one of which is fixed to the material box and the other is fixed to the wire channel (381).

8. The small 3D printing device with a built-in printing library according to claim 1, characterized in that, The print magazine (300) also includes a waste container (390) for holding raw materials that have fallen off the print head (310), the waste container (390) being disposed on the tool magazine holder (320).

9. The small 3D printing device with a built-in printing library according to claim 1, characterized in that, The bed assembly (100) also includes multiple heat insulation plates (130), which are arranged to form a processing cavity (140). The turntable (120) is located in the processing cavity (140), and a telescopic door (210) is provided on the upper side of the processing cavity (140) to allow the zero-point fixture (410) and the print head (310) to enter and exit.

10. The small 3D printing device with a built-in printing library according to claim 1, characterized in that, The moving mechanism (400) includes a first moving device (430), a second moving device (440), and a third moving device (450) for driving the zero-point clamp (410) to move left and right, forward and backward, and up and down, respectively.

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