CN103831975B - A kind of 3D print system structure - Google Patents
A kind of 3D print system structure Download PDFInfo
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- CN103831975B CN103831975B CN201410103155.8A CN201410103155A CN103831975B CN 103831975 B CN103831975 B CN 103831975B CN 201410103155 A CN201410103155 A CN 201410103155A CN 103831975 B CN103831975 B CN 103831975B
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Abstract
The present invention relates to a kind of 3D print system structure, comprising a liftable print platform, for supporting print platform double lead two optical axis Z axis driving mechanism, the X be positioned on print platform, Y-axis transmission mechanism and a fixed objective table.Print platform is provided with X, Y-axis drive motors, two motors are connected to a pair driven bearing respectively by the Timing Belt at driving shaft two ends, two sliding axles of X, Y-direction are all provided with sliding seat, and two pairs of sliding seats are connected by X, Y crossbeam respectively, and two crossbeams are each passed through 3D printing head; Connected by Timing Belt between the drive motors of the two optical axis driving mechanism of double lead and double lead, drive motors position can adjust arbitrarily.Sliding axle and the driving shaft of X of the present invention, Y-axis transmission mechanism work alone separately, decrease motion modulation, the two optical axis driving mechanism of double lead has good stability, makes print platform stress equalization, the driving of all directions is all more steady, improves the precision that 3D prints.
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 rotated and slide to drive 3D printing head in the motion of X, Y-direction simultaneously.Because same axle does sliding axle and turning cylinder simultaneously, can affect by multiple disturbing factor during the work of this device, thus affect machining accuracy.When 3D printing head carries out long period work, described shortcoming will be more outstanding, greatly reduce quality or the qualification rate of workpiece.
Meanwhile, adopt the mode of the monolateral suspension of L-type to provide Z axis to move more than in existing small-sized 3D printer, this device only adopts a vertical screw mandrel driving objective table to move in Z-direction.Owing to adopting monolateral suspension, be not easy to stablize during the work of this device, be easily out of shape under bearing condition, thus affect machining accuracy.When objective table size is done too much, described shortcoming will be more outstanding, in principle, therefore limit the size of workpiece.
Summary of the invention
The object of the invention is to solve the problems of the prior art, devise 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, decrease motion modulation, keep the even running of 3D printing head, the two optical axis driving mechanism of double lead of design has good stability, make print platform stress equalization, the motion of Z-direction is more steady, improves 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 the two optical axis Z axis driving mechanism of double lead that supports print platform and the X, the Y-axis transmission mechanism that are positioned 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 driven bearing respectively by the belt at driving shaft two ends, 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 each passed through 3D printing head; Connected by Timing Belt between the drive motors of the two optical axis Z axis driving mechanism of described double lead and double lead, drive motors position can adjust arbitrarily.During the work of this device, X-axis drive motors rotates X driving shaft, the pair of sliding seat on two sliding axles of X-direction is synchronously driven through two belt, X crossbeam moves, Y-axis drive motors rotates Y driving shaft, synchronously drive the pair of sliding seat on two sliding axles of Y-direction through two belt, Y crossbeam moves, and realizes the motion in x and y direction of 3D printing head thus; The drive motors of the two optical axis Z axis driving mechanism of double lead rotates, drive two screw mandrel synchronous axial system through Timing Belt, screw mandrel drives nut seat, drives print platform to move in Z-direction, two optical axis plays the effect of balance simultaneously, guarantees print platform at the volley perpendicular to Z axis.
Wherein, the two optical axis Z axis driving mechanism of described double lead is 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 vertical optical axis, two screw mandrels have suitable nut seat, 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 wherein and sliding axle work alone separately.
Wherein, described print platform is provided with counterweight relative to the offside of X, Y-axis drive motors, ensures that, when static state, the center of gravity of platform overlaps with the center of platform, to eliminate torsional moment, increase platform stabilization.
Wherein, described print platform there are enough areas can load optical axis, guide rail on demand, and the parts such as servo grating, realize full closed loop control, improve transmission accuracy further and prevent from losing step.
Wherein, the Timing Belt lateral surface that the two optical axis Z axis driving mechanism of described double lead uses, be provided with two tensile force adjusting device wheels, carry out tensile force adjustment to Timing Belt and turn to, the drive motors position in structure can adjust arbitrarily as required.
Wherein, the feed screw nut's seat in the two optical axis Z axis driving mechanism of described double lead is provided with L-type bracing frame, adds structural rigidity.
Wherein, described print platform can freely be elevated, and has larger space above it, and the top of printer can be added a cover, play dust-proof, insulation, noise reduction effect.
Advantage of the present invention:
Driving shaft in described X, Y-axis transmission mechanism and sliding axle work alone separately, decrease motion modulation, keep the even running of printing head, reduce manufacture and the detection difficulty of system.
Described print platform is provided with equilibrate counterweight relative to the offside of X, Y-axis drive motors, ensures that, when static state, platform center of gravity is in the central area of platform, to eliminate torsional moment, increase platform stabilization.
Described print platform there are enough areas can load optical axis, guide rail on demand, and the parts such as servo grating, realize full closed loop control, improve transmission accuracy further and prevent from losing step.
The Timing Belt lateral surface that the two optical axis Z axis driving mechanism of described double lead uses, be provided with two tensile force adjusting device wheels, carry out tensile force adjustment to Timing Belt and turn to, the drive motors position in structure can adjust arbitrarily as required.
Feed screw nut's seat in the two optical axis Z axis driving mechanism of described double lead is provided with L-type bracing frame, adds structural rigidity.
Described print platform can freely be elevated, and there is larger space top, and the top of printer can be added a cover, play dust-proof, insulation, noise reduction effect.
The present invention drives 3D printing head and monolateral suspension arrangement to carry out the 3D printing solution of driving objective table Z axis motion by replacing existing employing composite shaft device, 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 axis of the double lead cooperatively interacted, carry out plane formula and promote the motion of print platform in Z-direction.Such scheme significantly improves the kinematic accuracy of print structure, thus improves the machining accuracy of printer.In system structure design of the present invention, objective table have employed the mounting means be fixed on pedestal, this mode be conducive to insulation, energy-conservation, avoid objective table to shake the precise decreasing caused.
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 mechanism 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, first belt 205, second belt 206, 3rd belt 207, 4th belt 208, first driven bearing 209, second driven bearing 210, 3rd driven bearing 211, 4th driven bearing 212, first sliding axle 213, second sliding axle 214, 3rd sliding axle 215, 4th sliding axle 216, first sliding seat 217, second sliding seat 218, 3rd sliding seat 219, 4th sliding seat 220, X crossbeam 221, Y crossbeam 222, 3D printing head 223, balancing weight 224, first L-type bracing frame 225, second L-type bracing frame 226, first screw mandrel 301, second screw mandrel 302, drive motors 303, Timing Belt 304, first regulating wheel 305, second regulating wheel 306, primary optic axis 307, second optical axis 308, first nut seat 309, second nut seat 310, 5th sliding seat 311, 6th sliding seat 312.
Detailed description of the invention
Below embodiments of the invention are described.But following embodiment is only limitted to explain the present invention, and protection scope of the present invention should comprise the full content of claim, and by following examples, namely 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 form.X, Y-axis transmission mechanism are independent separately, can not mutually disturb at work.X transmission mechanism is made up of the driven bearing 210 of X driving shaft 203, first sliding axle 213, second sliding axle the 214, first driven bearing 209, second; 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 structure of double lead, and for supporting print platform 1, two screw mandrels and two optical axis diagonal angles are placed, and the lower end of screw mandrel and optical axis is all installed on the base 2, and objective table 3 is also installed on the base 2.On print platform 1 relative to X, y-axis motor 201,202 to side position, equilibrate counterweight 224 is also installed, ensures that, when static state, platform center of gravity is in the central area of platform, to eliminate torsional moment, increase platform stabilization.The position of double lead bottom print platform, also has the first L-type bracing frame 225 and the second L-type bracing frame 226 respectively, plays the effect increasing structural rigidity, improve kinetic stability.
Shown in figure 2, Fig. 3, X-axis drive motors 201 and Y-axis drive motors 202 is provided with in the side of print platform 1, X-axis drive motors 201 is connected to the driven bearing 210 of the first driven bearing 209, second on opposite by first belt 205, second belt 206 at X driving shaft 203 two ends, first sliding axle 213 of X-direction there is the first sliding seat 217, 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, second belt 206 is each passed through and is fixed on the first sliding seat 217, 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 at Y driving shaft 204 two ends, the 4th belt 208,3rd sliding axle 215 of Y-direction there is the 3rd sliding seat 219,4th sliding axle 216 there is the 4th sliding seat 220, two sliding seats are connected by Y crossbeam 222,3rd belt 207, the 4th belt 208 are each passed through and are fixed on the 3rd sliding seat 219, the 4th sliding seat 220, and X crossbeam 221 and Y crossbeam 222 are each passed 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 mechanism of the double lead of 3D printer.This device utilizes the drive motors 303 being located at pedestal 2 side, the first screw mandrel 301 and the second screw mandrel 302 is connected by Timing Belt 304, Timing Belt 304 is undertaken regulating and turning to by the first regulating wheel 305 and the second regulating wheel 306, first screw mandrel 301, second screw mandrel 302 to be vertically set in fuselage ring on one group of diagonal position, on other one group of diagonal position, be provided with vertical primary optic axis 307 and the second optical axis 308, double lead there is the first suitable nut seat 309 and the second nut seat 310, two optical axis there are the 5th suitable sliding seat 311 and the 6th sliding seat 312, two nut seats and two sliding seats, an entirety is connected into 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 is by the metallic plate of a monoblock, and formed at central aperture, central aperture region is the working region of 3D printing head, and the size of perforate size and objective table 3 matches.The circumferential side frame of print platform there are enough areas, therefore there is very strong flexibility, optical axis, guide rail can be loaded on demand, and the parts such as servo grating, realize full closed loop control, improve transmission accuracy further and prevent from losing step.
When starting working, print platform 1 needs the position dropped to close to objective table 3, and along with by the shaping of printing objects, 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, play dust-proof, insulation, noise reduction effect.If printing larger object, print platform 1 rises to when top, can open top cover, expands 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 when the object that printing volume is more heavier, objective table can produce sinking at far-end, cause and print every highly layer by layer to increase gradually, 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, simplify structure, but working life is short, poor reliability, under bearing wear, the common situations such as optical axis linearity declines, installation accuracy is inadequate, all can cause complicated motion modulation, cause printing precision to decline.Such as, if X-axis linearity is poor, so operationally, not only can cause the fluctuating of X-direction, and can cause printhead circular motion in the Y direction, 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 multiple parts exist error, then there is mutual superposition and the enlarge-effect of error, the error of each axle in each spatial point in fact can be caused to be difficult to accurately measuring and calculating and to 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 fixing on the base 2, by double lead, the Z axis of two plain shaft structure drives, and ensures the stable elevation of print platform 1; By design balance balancing weight 224 and the first L-type bracing frame 225, second L-type bracing frame 226, ensure that stress equalization and the structural rigidity of print platform 1; In addition, system architecture of the present invention, also reduces machine gravity, reduces operation vibration, helpful to raising precision.
2, X, Y-axis precision: X transmission mechanism is made up of the driven bearing 210 of X driving shaft 203, first sliding axle 213, second sliding axle the 214, first driven bearing 209, 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 the 211, four.By being separated the driving mechanism of X, Y-axis, making it to be independent of each other, effectively reducing systematic error, greatly reducing cross jamming.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, then error can reduce further.
3, whole structure: according to the design of the embodiment of the present invention, eliminate Z axis far-end sedimentation type error, also eliminate superposition and the enlarge-effect of error, when part design, installation accuracy, control circuit are good, X, Y-axis positioning precision easily can reach 1 ~ 3um, and Z axis positioning precision easily can 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.Namely all equivalences done according to the content of the present patent application the scope of the claims change and modify, and 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 mechanism of double lead of print platform, be positioned at the XY shaft transmission on print platform, and a 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 driven bearing respectively by the belt at driving shaft two ends, 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 each passed through 3D printing head, connected by Timing Belt between the drive motors of the two optical axis Z axis driving mechanism of described double lead and double lead, drive motors position can adjust arbitrarily, during this arrangement works, X-axis drive motors rotates X driving shaft, the pair of sliding seat on two sliding axles of X-direction is synchronously driven through two belt, X crossbeam moves, Y-axis drive motors rotates Y driving shaft, a pair liang of sliding seat on the two sliding axles synchronously driving Y-direction through two belt, the motion of Y crossbeam, realizes the motion in x and y direction of 3D printing head thus, the drive motors of the two optical axis Z axis driving mechanism of double lead rotates, drive a pair screw mandrel synchronous axial system through Timing Belt, screw mandrel drives nut seat, drives print platform to move in Z-direction, two optical axis plays the effect of balance simultaneously, guarantees print platform 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 mechanism of described double lead is 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 vertical optical axis, two screw mandrels have suitable nut seat, 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: described print platform is provided with counterweight relative to the offside of X, Y-axis drive motors, ensure that, when static state, the center of gravity of platform overlaps with the center of platform, to eliminate torsional moment, increase platform stabilization.
5. 3D print system structure according to claim 1, is characterized in that: described print platform has enough areas can load optical axis, guide rail on demand; Also can load servo grating, realize full closed loop control, improve transmission accuracy further 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 mechanism of described double lead uses, be provided with two regulating wheels, carry out tensile force adjustment to Timing Belt and turn to, the drive motors position in structure can adjust 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 mechanism of described double lead is provided with L-type bracing frame, adds structural rigidity.
8. 3D print system structure according to claim 1, is characterized in that: described print platform can freely be elevated, and has larger space above it, and the top of printer can be added a cover, play dust-proof, insulation, noise reduction effect.
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| CN201410103155.8A CN103831975B (en) | 2014-03-19 | 2014-03-19 | A kind of 3D print system structure |
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| CN201410103155.8A CN103831975B (en) | 2014-03-19 | 2014-03-19 | A kind of 3D print system structure |
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| CN103831975B true CN103831975B (en) | 2016-04-13 |
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