CN103831975A - 3D (three-dimensional) printing system structure - Google Patents
3D (three-dimensional) printing system structure Download PDFInfo
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- CN103831975A CN103831975A CN201410103155.8A CN201410103155A CN103831975A CN 103831975 A CN103831975 A CN 103831975A CN 201410103155 A CN201410103155 A CN 201410103155A CN 103831975 A CN103831975 A CN 103831975A
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Abstract
The invention relates to a 3D (three-dimensional) printing system structure. The 3D (three-dimensional) printing system structure comprises a lifting printing platform, a dual-screw dual-optical-axis Z-shaft driving mechanism, an X-shaft drive mechanism, a Y-shaft drive mechanism as well as a stationary object carrying platform, wherein the printing platform is provided with an X-shaft drive motor and a Y-shaft drive motor; the two motors are respectively connected to a pair of driven bearings by synchronous belts at two ends of the driving shaft; double slide shafts in the X direction and the Y direction are both provided with slide seats; two pairs of slide seats are respectively connected by an X cross beam and a Y cross beam, and the two cross beams respectively penetrate through a 3D printer head; a driving motor of the dual-screw dual-optical-axis driving mechanism and the driving shaft are connected by the synchronous belt; the position of the driving motor can be adjusted randomly. The X-shaft drive mechanism, the Y-shaft drive mechanism and the driving shaft operate individually, so that the motion modulation is reduced; the dual-screw dual-optical-axis driving mechanism has favorable stability, so that the printing platform is stressed in a balance manner; the driving in each direction is stable; the 3D printing precision is improved.
Description
Technical field
The invention belongs to 3D printing technique field, particularly a kind of 3D print system structure.
Background technology
In existing small-sized 3D printer, many employings provide the composite shaft device rotating and slide to drive the motion of 3D printing head in X, Y-direction simultaneously.Because same axle does sliding axle and turning cylinder simultaneously, when this device work, affected by multiple disturbing factor, thereby affect machining accuracy.When 3D printing head carries out when work long period, described shortcoming will be more outstanding, greatly reduce quality or the qualification rate of workpiece.
Meanwhile, adopt more than in existing small-sized 3D printer the mode of the monolateral suspension of L-type that Z axis motion is provided, this device only adopts a vertical screw mandrel driving objective table to move in Z-direction.Owing to adopting monolateral suspension, when this device work, be not easy to stablize, easily distortion under load-bearing condition, thereby affect machining accuracy.Objective table size is done time too much, and described shortcoming will be more outstanding, therefore in principle, limit the size of workpiece.
Summary of the invention
The object of the invention is to solve the problems of the prior art, designed a kind of operation 3D print system structure more stably.X, the Y-axis transmission mechanism of this structure are provided with separate driving shaft and sliding axle, do not interfere with each other, reduce motion modulation, keep the even running of 3D printing head, the two optical axis driving mechanisms of double lead of design have good stability, make print platform stress equalization, the motion of Z-direction is more steady, has improved the machining accuracy that 3D prints.
Technical scheme of the present invention is: a kind of 3D print system structure, comprise a liftable print platform, for supporting the two optical axis Z axis driving mechanisms of double lead of print platform and being positioned at X, the Y-axis transmission mechanism on print platform, described print platform is provided with X-axis drive motors and Y-axis drive motors, two motors are connected to a pair of driven bearing by the belt at driving shaft two ends respectively, on two sliding axles of X and Y-direction, respectively there is pair of sliding seat, two pairs of sliding seats are connected with Y crossbeam by X crossbeam respectively, and two crossbeams are respectively through 3D printing head; Between the drive motors of the described two optical axis Z axis driving mechanisms of double lead and double lead, connected by Timing Belt, drive motors position can be adjusted arbitrarily.When the work of this device, X-axis drive motors rotates X driving shaft, synchronously drive the pair of sliding seat on two sliding axles of directions X through two belts, the motion of X crossbeam, Y-axis drive motors rotates Y driving shaft, synchronously drive the pair of sliding seat on two sliding axles of Y-direction through two belts, Y crossbeam moves, and realizes thus the motion of 3D printing head in X and Y-direction; The drive motors of the two optical axis Z axis driving mechanisms of double lead rotates, drive two screw mandrels synchronously to rotate through Timing Belt, screw mandrel drives nut seat, drives print platform to move in Z-direction, simultaneously two optical axises play the effect of balance, guarantee that print platform is at the volley perpendicular to Z axis.
Wherein, the two optical axis Z axis driving mechanisms of described double lead are provided with double lead, two screw mandrels are vertically set on one group of diagonal position in fuselage ring, on other one group of diagonal position, be provided with a pair of vertical optical axis, on two screw mandrels, have suitable nut seat, on two optical axises, have suitable sliding seat, two nut seats and two sliding seats, connect into an entirety by print platform.
Wherein, described X, Y-axis transmission mechanism, driving shaft and sliding axle wherein work alone separately.
Wherein, on described print platform, be provided with counterweight with respect to the offside of X, Y-axis drive motors, guarantee in the time of static state, the center of gravity of platform overlaps with the center of platform, to eliminate torsional moment, increases platform stable.
Wherein, on described print platform, there are enough areas can load on demand optical axis, guide rail, and servo with parts such as gratings, realize closed-loop control, further improve transmission accuracy and prevent from losing step.
Wherein, the Timing Belt lateral surface that the two optical axis Z axis driving mechanisms of described double lead use, is provided with two tensile force adjusting device wheels, and Timing Belt is carried out tensile force adjusting and turned to, and the drive motors position in structure can be adjusted arbitrarily as required.
Wherein, the feed screw nut's seat in the two optical axis Z axis driving mechanisms of described double lead is provided with L-type bracing frame, has increased structural rigidity.
Wherein, described print platform can free lifting, and there is larger space its top, and the top of printer can be added a cover, and plays the effect of dustproof, insulation, noise reduction.
Advantage of the present invention:
Driving shaft and sliding axle in described X, Y-axis transmission mechanism work alone separately, have reduced motion and have modulated, and keep the even running of printing head, have reduced manufacture and the detection difficulty of system.
On described print platform, be provided with equilibrate counterweight with respect to the offside of X, Y-axis drive motors, guarantee in the time of static state, the central area of platform center of gravity in platform, to eliminate torsional moment, increases platform stable.
On described print platform, there are enough areas can load on demand optical axis, guide rail, and servo with parts such as gratings, realize closed-loop control, further improve transmission accuracy and prevent from losing step.
The Timing Belt lateral surface that the two optical axis Z axis driving mechanisms of described double lead use, is provided with two tensile force adjusting device wheels, and Timing Belt is carried out tensile force adjusting and turned to, and the drive motors position in structure can be adjusted arbitrarily as required.
Feed screw nut's seat in the two optical axis Z axis driving mechanisms of described double lead is provided with L-type bracing frame, has increased structural rigidity.
Described print platform can free lifting, and there is larger space top, and the top of printer can be added a cover, and plays the effect of dustproof, insulation, noise reduction.
The present invention will replace existing employing composite shaft device to drive 3D printing head and monolateral suspension arrangement to carry out the 3D printing solution of driving objective table Z axis motion, by the compound motion on same axle being decomposed into the simple motion of 2 axle independent operatings, steadily promote the motion of 3D printing head in X, Y-direction, and with the two optical axises of the double lead cooperatively interacting, carry out plane formula and promote the motion of print platform in Z-direction.Such scheme has significantly improved the kinematic accuracy of print structure, thereby has improved the machining accuracy of printer.In system structure design of the present invention, objective table has adopted the mounting means being fixed on pedestal, and this mode is conducive to insulation, energy-conservation, avoids objective table to shake the precise decreasing causing.
Accompanying drawing explanation
Fig. 1 is 3D print system overall structure schematic diagram of the present invention;
Fig. 2 is the schematic diagram of X of the present invention, Y-axis transmission mechanism;
Fig. 3 is X of the present invention, Y-axis transmission mechanism top view;
Fig. 4 is the schematic diagram of the two optical axis Z axis driving mechanisms of double lead of the present invention;
Wherein: print platform 1, pedestal 2, objective table 3, X-axis drive motors 201, Y-axis drive motors 202, X driving shaft 203, Y driving shaft 204, the first belt 205, the second belt 206, the 3rd belt 207, the 4th belt 208, the first driven bearing 209, the second driven bearing 210, the 3rd driven bearing 211, the 4th driven bearing 212, the first sliding axle 213, the second sliding axle 214, the 3rd sliding axle 215, the 4th sliding axle 216, the first sliding seat 217, the second sliding seat 218, the 3rd sliding seat 219, the 4th sliding seat 220, X crossbeam 221, Y crossbeam 222, 3D printing head 223, balancing weight 224, the first L-type bracing frame 225, the second L-type bracing frame 226, the first screw mandrel 301, the second screw mandrel 302, drive motors 303, Timing Belt 304, the first regulating wheel 305, the second regulating wheel 306, primary optic axis 307, the second optical axis 308, the first nut seat 309, the second nut seat 310, the 5th sliding seat 311, the 6th sliding seat 312.
The specific embodiment
Embodiments of the invention are below described.But following embodiment only limits to explain the present invention, and protection scope of the present invention should comprise the full content of claim, and by following examples, those skilled in the art can realize the full content of the claims in the present invention.
As shown in Figure 1, Figure 2, Figure 3 shows, be a kind of 3D print system structure of the present invention, by print platform 1, pedestal 2, objective table 3 and be positioned at X on print platform 1, Y-axis transmission mechanism, the Z axis driving mechanism that connects print platform 1 and pedestal 2 forms.X, Y-axis transmission mechanism are independent separately, not phase mutual interference at work.X transmission mechanism is made up of X driving shaft 203, the first sliding axle 213, the second sliding axle 214, the first driven bearing 209, the second driven bearing 210; Y transmission mechanism is made up of Y driving shaft 204, the 3rd sliding axle 215, the 4th sliding axle 216, the 3rd driven bearing 211, the 4th driven bearing 212.Z axis driving mechanism adopts the two plain shaft structures of double lead, places for supporting print platform 1, two screw mandrel and two optical axis diagonal angles, and the lower end of screw mandrel and optical axis is all arranged on pedestal 2, and objective table 3 is also arranged on pedestal 2.On print platform 1 with respect to X, y-axis motor 201,202 to side position, equilibrate counterweight 224 is also installed, guarantee in the time of static state, the central area of platform center of gravity in platform, to eliminate torsional moment, increase platform stable.The position of print platform bottom double lead, also has respectively the first L-type bracing frame 225 and the second L-type bracing frame 226, plays the effect that increases structural rigidity, improves kinetic stability.
Shown in figure 2, Fig. 3, be provided with X-axis drive motors 201 and Y-axis drive motors 202 in a side of print platform 1, X-axis drive motors 201 is connected to the first driven bearing 209, the second driven bearing 210 on opposite by the first belt 205, second belt 206 at X driving shaft 203 two ends, on the first sliding axle 213 of directions X, there is the first sliding seat 217, on the second sliding axle 214, there is the second sliding seat 218, two sliding seats are connected by X crossbeam 221, and the first belt 205, the second belt 206 pass respectively and are fixed on the first sliding seat 217, the second sliding seat 218; Y-axis drive motors 202 is connected to the 3rd driven bearing 211, the 4th driven bearing 212 on opposite by the 3rd belt 207, the 4th belt 208 at Y driving shaft 204 two ends, on the 3rd sliding axle 215 of Y-direction, there is the 3rd sliding seat 219, on the 4th sliding axle 216, there is the 4th sliding seat 220, two sliding seats are connected by Y crossbeam 222, the 3rd belt 207, the 4th belt 208 pass respectively and are fixed on the 3rd sliding seat 219, the 4th sliding seat 220, and X crossbeam 221 and Y crossbeam 222 are respectively through 3D printing head 223.3D printing head 223 is transmitted by X crossbeam 221 and Y crossbeam 222 in the driving force of X, Y-axis.
As shown in Figure 4, the two optical axis Z axis driving mechanisms of the double lead of 3D printer.This device utilization is located at the drive motors 303 of pedestal 2 one sides, connect the first screw mandrel 301 and the second screw mandrel 302 by Timing Belt 304, Timing Belt 304 is regulated and is turned to by the first regulating wheel 305 and the second regulating wheel 306, the first screw mandrel 301, the second screw mandrel 302 is vertically set on the interior one group of diagonal position of fuselage ring, on other one group of diagonal position, be provided with vertical primary optic axis 307 and the second optical axis 308, on double lead, there are the first suitable nut seat 309 and the second nut seat 310, on two optical axises, there are the 5th suitable sliding seat 311 and the 6th sliding seat 312, two nut seats and two sliding seats, connect into an entirety by print platform 1.Drive motors 303 drives the first screw mandrel 301 and the second screw mandrel 302 to be synchronized with the movement by Timing Belt 304, realizes the steady lifting of print platform 1.Due to system architecture, the position of drive motors can need reasonable placement according to design, has taken into account the demand of precision and flexibility.
Shown in figure 4, print platform 1, by the metallic plate of a monoblock, forms in middle perforate, and middle opening area is the working region of 3D printing head, and the size of perforate size and objective table 3 matches.On the surrounding frame of print platform, there are enough areas, therefore there is very strong flexibility, can load on demand optical axis, guide rail, and servo with parts such as gratings, realize closed-loop control, further improve transmission accuracy and prevent from losing step.
In the time starting working, print platform 1 need to drop to the position that approaches objective table 3, and along with being printed the shaping of object, progressively rises.Therefore, there is larger space the top of print platform 1 under normal circumstances, and the top of printer can be added a cover, and plays the effect of dustproof, insulation, noise reduction.If printing larger object, when print platform 1 rises near top, can open top cover, expand the upstream space of print platform 1.
Existing 3D printer, that X, Y-axis transmission mechanism are fixed in the top planes of complete machine mostly, Z axis adopts the design of the monolateral suspension lifting of L-type, the shortcoming of this design is that machine center is high, operation vibration is large, and in the time printing the large heavier object of volume, objective table can produce sinking at far-end, cause often high increase gradually layer by layer of printing, reduce the Z axis precision that 3D prints.In addition, if the sliding axle of X, Y driving mechanism uses as rotating shaft simultaneously, can reduce costs, simplified structure, but working life is short, poor reliability, under the common situations such as decline in bearing wear, optical axis linearity, installation accuracy is inadequate, all can cause complicated motion modulation, cause printing precision to decline.For example, if X-axis linearity is poor, in the time of operation, not only can causes the fluctuating of directions X, and can cause the circular motion of printhead in Y-direction so, the precision of X, Y-axis all can and then reduce, and then it is unstable to cause printing floor height, and Z axis precision is also affected.If there is error in multiple parts, there is mutual stack and the enlarge-effect of error, in fact can cause the error of each axle in each spatial point be difficult to accurately measuring and calculating and control.
The system architecture of the embodiment of the present invention, can overcome above-mentioned shortcoming.Be respectively described below:
1, Z axis precision: objective table 3 is fixed on pedestal 2, by double lead, the Z axis of two plain shaft structures drives, and guarantees the stable elevation of print platform 1; By design balance balancing weight 224 and the first L-type bracing frame 225, the second L-type bracing frame 226, guarantee stress equalization and the structural rigidity of print platform 1; In addition, system architecture of the present invention, has also reduced machine gravity, has reduced operation vibration, helpful to improving precision.
2, X, Y-axis precision: X transmission mechanism is made up of X driving shaft 203, the first sliding axle 213, the second sliding axle 214, the driven bearing 210 of the first driven bearing 209, the second; Y transmission mechanism is made up of Y driving shaft 204, the 3rd sliding axle 215, the 4th sliding axle 216, the driven bearing 212 of the 3rd driven bearing 211, the four.By separating the driving mechanism of X, Y-axis, make it to be independent of each other, effectively reduce systematic error, greatly reduce to intersect and disturb.The kinematic error of X, Y-direction also can not impact Z axis precision.If replace X, Y optical axis to be fixed on print platform 1 with guide rail, error can further reduce.
3, whole structure: according to the design of the embodiment of the present invention, eliminate Z axis far-end sedimentation type error, also stack and the enlarge-effect of error have been eliminated, in the situation that part design, installation accuracy, control circuit are good, X, Y-axis positioning precision can easily reach 1～3um, and Z axis positioning precision can easily reach 0.1～0.3um.Overall precision index substantially exceeds the required precision of fusion sediment type 3D printer.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application the scope of the claims change and modify, all should belong to technology category of the present invention.
Claims (8)
1. a 3D print system structure, this structure comprises a liftable print platform, support the two optical axis Z axis driving mechanisms of double lead of print platform, be positioned at the XY shaft transmission on print platform, an and fixed objective table, it is characterized in that: the adjacent both sides of described print platform are respectively provided with X-axis drive motors and Y-axis drive motors, two motors are connected to a pair of driven bearing by the belt at driving shaft two ends respectively, on two sliding axles of X and Y-direction, respectively there is pair of sliding seat, two pairs of sliding seats are connected with Y crossbeam by X crossbeam respectively, two crossbeams are respectively through 3D printing head, between the drive motors of the described two optical axis driving mechanisms of double lead and double lead, connected by Timing Belt, drive motors position can be adjusted arbitrarily, when this arrangement works, X-axis drive motors rotates X driving shaft, synchronously drive the pair of sliding seat on two sliding axles of directions X through two belts, the motion of X crossbeam, Y-axis drive motors rotates Y driving shaft, synchronously drive a pair of two sliding seats on two sliding axles of Y-direction through two belts, Y crossbeam moves, and realizes thus the motion of 3D printing head in X and Y-direction, the drive motors of the two optical axis driving mechanisms of double lead rotates, drive a pair of screw mandrel synchronously to rotate through Timing Belt, screw mandrel drives nut seat, drives print platform to move in Z-direction, simultaneously two optical axises play the effect of balance, guarantee that print platform is at the volley perpendicular to Z axis.
2. 3D print system structure according to claim 1, it is characterized in that: the two optical axis Z axis driving mechanisms of described double lead are provided with double lead, two screw mandrels are vertically set on one group of diagonal position in fuselage ring, on other one group of diagonal position, be provided with a pair of vertical optical axis, on two screw mandrels, have suitable nut seat, on two optical axises, have suitable sliding seat, two nut seats and two sliding seats, connect into an entirety by print platform.
3. 3D print system structure according to claim 1, is characterized in that: described XY shaft transmission, driving shaft and sliding axle work alone separately.
4. 3D print system structure according to claim 1, it is characterized in that: on described print platform, be provided with counterweight with respect to the offside of X, Y-axis drive motors, guarantee in the time of static state, the center of gravity of platform overlaps with the center of platform, to eliminate torsional moment, increase platform stable.
5. 3D print system structure according to claim 1, is characterized in that: on described print platform, have enough areas can load on demand optical axis, guide rail; Also can load the servo grating of using, realize closed-loop control, further improve transmission accuracy and prevent from losing step.
6. 3D print system structure according to claim 1, it is characterized in that: the Timing Belt lateral surface that the two optical axis Z axis driving mechanisms of described double lead use, be provided with two regulating wheels, Timing Belt is carried out tensile force adjusting and turned to, and the drive motors position in structure can be adjusted arbitrarily as required.
7. 3D print system structure according to claim 1, is characterized in that: the feed screw nut's seat in the two optical axis Z axis driving mechanisms of described double lead is provided with L-type bracing frame, has increased structural rigidity.
8. 3D print system structure according to claim 1, is characterized in that: described print platform can free lifting, and there is larger space its top, and the top of printer can be added a cover, and plays the effect of dustproof, insulation, noise reduction.
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