CN105538708A - 3D printing system applying embedded PLC - Google Patents

Abstract

The invention discloses a 3D printing system applying an embedded PLC. A programmable logic controller PLC central system is respectively connected with a laser nozzle, a material box, a monitor and a transmitter; the transmitter is connected with a distributor through an isolator; the laser nozzle is provided with multiple nozzles; the nozzles are aligned to printing models; and the programmable logic controller PLC central system is connected with the material box to control normal precise printing of material box equipment. The programmable logic controller PLC central system is respectively connected with the transmitter, the isolator and the distributor to prevent electric field signals from interfering the programmable logic controller PLC central system; and the laser nozzle realizes all-metal printing, and achieves effects like a cutter through an optical fiber laser head. The 3D printing system has the following beneficial effects: the 3D printing system effectively improves the 3D printing precision so as to realize 3D all-metal printing.

Description

A kind of 3D print system applying Embedded PLC

Technical field

The invention belongs to 3D printing technique field, relate to a kind of 3D print system applying Embedded PLC.

Background technology

Mostly traditional product manufacturing, be to adopt mould to be blank by material forming, then adopts the methods such as machined to remove excess stock, be shaped to the parts requiring size, can be described as " subtracting material autofrettage ".And 3D prints manufacturing technology in contrast, be produce three-dimensional body by the successively interpolation of material, be defined as " increasing material manufacture " method.Plastics (polymer) material can only be used in the past because 3D prints, therefore 3D print not pay attention to by large-scale industry, and 3D can print and apply to the large-scale industries such as Aero-Space, automobile, biomedicine by the development of LENS printing technique at present.Programmable controller (PLC) is specially for Industry Control designs, and manufacturing industry by PLC control 3D process, adopts multi-level interference protection measure in casting process, 3D is printed stability and reliability greatly improve.Existing 3D print system, prints accuracy for 3D all-metal not high, and along with the development of computer technology, the function of PLC is also more and more stronger, and it is more and more convenient to use.In order to improve the reliability printed 3D of PLC control system, key is hardware and software arranges duplicate protection.The 3D embedding PLC technology logic PLC prints and can realize " all-metal printing " in conjunction with LENS technology.

Summary of the invention

The object of the present invention is to provide a kind of 3D print system applying Embedded PLC, solve existing 3D print system, the not high problem of accuracy is printed for 3D all-metal.

The technical solution adopted in the present invention comprises PLC technology logic PLC center system, PLC technology logic PLC center system is connecting laser shower nozzle, material cartridge respectively, monitor, transmitter, transmitter connects distributor by isolator, laser instrument shower nozzle is provided with some shower nozzles, and shower nozzle aims at printer model;

PLC technology logic PLC center system connecting material box controls the normal precise Printing of material cartridge equipment.PLC technology logic PLC center system connects transmitter, isolator and distributor successively, is to prevent electric field signal from disturbing PLC technology logic PLC center system; Laser instrument shower nozzle realizes all-metal and prints, and plays the same effect of cutting machine by optical fibre laser head.

Further, described PLC technology logic PLC center system connecting material box controls in the normal precise Printing of material cartridge equipment, Embedded PLC can carry out the printing of detection limit, limit, and detection way by Gaussian convolution formulae discovery detection edge, thus reaches high accurancy and precision detection acquisition;

G _xg _yg _zfor certain point is in the convolution epipole of x, y, z tri-axles, obtained by Gaussian convolution:

$G_x=\frac{1}{2}\left[\begin{array}{cc}-\mathrm{\ι}& -\mathrm{\ι}\\ +\mathrm{\ι}& +\mathrm{\ι}\end{array}\right]G_y=\frac{1}{2}\left[\begin{array}{cc}+\mathrm{\ι}& -\mathrm{\ι}\\ +\mathrm{\ι}& -\mathrm{\ι}\end{array}\right]G_z=\frac{1}{2}\left[\begin{array}{cc}+\mathrm{\ι}& -\mathrm{\ι}\\ -\mathrm{\ι}& +\mathrm{\ι}\end{array}\right];---\left(1\right)$

Wherein analysis result can be brought in variable ι, occur that the protuberance point that flat rate is higher represents contour edge, the result vector collection so detected is:

$\left|G_{i,j}\right|=\sqrt{G_x{(i,j)}^2+G_y{(i,j)}^2+G_z{(i,j)}^2};---\left(2\right)$

Vectorial angle θ _i,j=arctan (G _y(i, j)/G _x(i, j)); (3)

${\stackrel{\‾}{\mathrm{\θ}}}_{i,j}=\arctan \left(G_z\right(i,j)/G_y(i,j\left)\right);---\left(4\right)$

${\stackrel{\‾}{\mathrm{\θ}}}_{i,j}^{\′}=\arctan \left(G_z\right(i,j)/G_x(i,j\left)\right);---\left(5\right)$

In 3D print procedure, photocurable liquid polymer is sprayed for very thin layer, then solidified by UV (ultraviolet) light.

Further, the print procedure of described laser instrument shower nozzle: utilize PLC technology logic PLC center system to carry out PLC control, material powder is blown into the high-power laser beam meticulously guided, in 3D print procedure, the powder of laser beam can drop on one side, the powder running into laser spot can melt immediately and be fused to the surface of incremental portion, therefore when laser spot scans crosses the profile of print object, when printhead blows out more powder, parts will increase layer by layer gradually.

The invention has the beneficial effects as follows that effectively improving 3D prints accuracy, thus realize the printing of 3D all-metal.

Accompanying drawing explanation

Fig. 1 is the 3D print system structural representation of Embedded PLC of the present invention.

In figure, 1. PLC technology logic PLC center system, 2. laser instrument shower nozzle, 3. material cartridge, 4. monitor, 5. transmitter, 6. isolator, 7. distributor, 201. shower nozzles, 202. printer models.

Detailed description of the invention

Below in conjunction with detailed description of the invention, the present invention is described in detail.

PLC technology logic PLC center system of the present invention as shown in Figure 1, comprise PLC technology logic PLC center system 1, PLC technology logic PLC center system 1 is connecting laser shower nozzle 2, material cartridge 3 respectively, monitor 4, transmitter 5, transmitter 5 connects distributor 7 by isolator 6, laser instrument shower nozzle 2 is provided with some shower nozzles 201, and shower nozzle 201 aims at printer model 202.

PLC technology logic PLC center system 1 connecting material box controls the normal precise Printing of material cartridge equipment.PLC technology logic PLC center system 1 connects transmitter 5, isolator 6 and distributor 7 successively, is to prevent electric field signal from disturbing PLC technology logic PLC center system 1.

Laser instrument shower nozzle 2 realizes all-metal and prints, and plays the same effect of cutting machine by optical fibre laser head, adopts the YAG solid-state laser of optical fibre laser head can realize all-metal and print during printing.

Wherein, PLC technology logic PLC center system 1 connecting material box 3 controls in the normal precise Printing of material cartridge equipment, and the detection of fluid sliding edge is the core of this 3D printing technique, and realize all-metal printing must to improve premised on accuracy.Embedded PLC can carry out the printing of detection limit, limit, and detection way by Gaussian convolution formulae discovery detection edge, thus reaches high accurancy and precision detection acquisition.

G _xg _yg _zfor certain point is in the convolution epipole (convolutionkernels) of x, y, z tri-axles.Rolled up by Gauss

Amass and obtain: $G_x=\frac{1}{2}\left[\begin{array}{cc}-\mathrm{\ι}& -\mathrm{\ι}\\ +\mathrm{\ι}& +\mathrm{\ι}\end{array}\right]G_y=\frac{1}{2}\left[\begin{array}{cc}+\mathrm{\ι}& -\mathrm{\ι}\\ +\mathrm{\ι}& -\mathrm{\ι}\end{array}\right]G_z=\frac{1}{2}\left[\begin{array}{cc}+\mathrm{\ι}& -\mathrm{\ι}\\ -\mathrm{\ι}& +\mathrm{\ι}\end{array}\right];---\left(1\right)$

Wherein analysis result can be brought in variable ι.Occur that the protuberance point that flat rate is higher represents contour edge, the result vector collection so detected is:

$\left|G_{i,j}\right|=\sqrt{G_x{(i,j)}^2+G_y{(i,j)}^2+G_z{(i,j)}^2};---\left(2\right)$

Vectorial angle θ _i,j=arctan (G _y(i, j)/G _x(i, j)); (3)

${\stackrel{\‾}{\mathrm{\θ}}}_{i,j}=\arctan \left(G_z\right(i,j)/G_y(i,j\left)\right);---\left(4\right)$

${\stackrel{\‾}{\mathrm{\θ}}}_{i,j}^{\′}=\arctan \left(G_z\right(i,j)/G_x(i,j\left)\right);---\left(5\right)$

In 3D print procedure, photocurable liquid polymer is sprayed for very thin layer, then solidified by UV (ultraviolet) light.Key is the thin layer that the drop sprayed can form 16 μm quickly and accurately, this precision just can complete the industry of high-resolution shape and high accuracy size and medical application, again by multiple printhead, print different materials and improve print speed, so possessed emulative market-oriented technical conditions.

PLC technology logic PLC center system 1 is disturbed in order to prevent electric field signal, this technology adopts the Gaussian convolution convolution based on edge detection, if the shock response of a linear system (being wave filter here) is H (t), so for any input x (t), can calculate y (t) .3D print system by convolution is by shock response sequence under discrete state:

Overlay elements can be obtained by Gauss's edge detection in each filter response region, thus be undertaken deleting dimensionality reduction by software filtering.After optimizing, overlay model is as follows

(1)D1＝(x-x ₀) ²+(y-y ₀) ²+-r ²；(6)

(2)D1＝(x-x ₀) ²+(y-(y ₀)-c)) ²-r ²；(7)

(3)D2＝D1+2c(y-y0)+c ²；(8)

(4)D1(P2)＝D1(P1)+2d(y-y0)+d ²；(9)

Measure k the stacking vector of change thus all vectors detected are formed a matrix

According to above result, a filtering result of detection counter is set, each sampled value is compared with current virtual value: if sampled value=current virtual value, if then counter O reset sampled value <> is current effectively judge counter whether >=upper limit N (spilling), if counter overflow, then this sub-value is replaced current virtual value, and clear counter.

The print procedure of laser instrument shower nozzle 2: utilize PLC technology logic PLC center system 1 to carry out PLC control, material powder is blown into the high-power laser beam meticulously guided, in 3D print procedure, the powder of laser beam can drop on one side, the powder running into laser spot can melt immediately and be fused to the surface of incremental portion, therefore when laser spot scans crosses the profile of print object, when printhead blows out more powder, parts will increase layer by layer gradually.Utilize PLC technology logic PLC to walk abreast and utilize multiple printhead to blow powder to laser beam simultaneously, multiple underlying metal is used proportionally to print " alloy ", this ratio can adjust according to the position of printhead, generates the alloy of various rank, thus carries out " metallic print ".

Printer model prints threedimensional model by raw metal, and threedimensional model teacher uses ontology library to set up printer model, and ontology library is set up according to ontology element relationship entity table, as shown in table 1.

Table 1

3D can be set up according to this exam pool after setting up ontology library after Gauss's edge detection and print general fit calculation model.After having had general fit calculation model, the material cartridge that PLC connects is by printing accuracy by self-adaptative adjustment in laser printing process, thus real time print goes out all-metal model.Following table 2 is the accuracy contrast of existing 3D Method of printing and 3D Method of printing of the present invention.

Table 2

The above is only to better embodiment of the present invention, not any pro forma restriction is done to the present invention, every any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong in the scope of technical solution of the present invention.

Claims (3)

1. apply the 3D print system of Embedded PLC for one kind, it is characterized in that: comprise PLC technology logic PLC center system (1), PLC technology logic PLC center system (1) is connecting laser shower nozzle (2), material cartridge (3) respectively, monitor (4), transmitter (5), transmitter (5) connects distributor (7) by isolator (6), laser instrument shower nozzle (2) is provided with some shower nozzles (201), and shower nozzle (201) aims at printer model (202);

PLC technology logic PLC center system (1) connecting material box (3) controls the normal precise Printing of material cartridge equipment, PLC technology logic PLC center system (1) connects transmitter (5), isolator (6) and distributor (7) successively, is to prevent electric field signal from disturbing PLC technology logic PLC center system (1); Laser instrument shower nozzle (2) realizes all-metal and prints, and plays the same effect of cutting machine by optical fibre laser head.

2. according to the 3D print system applying Embedded PLC a kind of described in claim 1, it is characterized in that: described PLC technology logic PLC center system (1) connecting material box (3) controls in the normal precise Printing of material cartridge equipment, Embedded PLC can be carried out detection limit, limit and be printed, detection way by Gaussian convolution formulae discovery detection edge, thus reaches high accurancy and precision detection acquisition;

G _xg _yg _zfor certain point is in the convolution epipole of x, y, z tri-axles, obtained by Gaussian convolution:

$\begin{array}{ccc}{G}_x=\frac{1}{2}\left[\begin{array}{cc}-\mathrm{\&iota;}& -\mathrm{\&iota;}\\ +\mathrm{\&iota;}& +\mathrm{\&iota;}\end{array}\right]& G_y=\frac{1}{2}\left[\begin{array}{cc}+\mathrm{\&iota;}& -\mathrm{\&iota;}\\ +\mathrm{\&iota;}& -\mathrm{\&iota;}\end{array}\right]& G_z=\frac{1}{2}\left[\begin{array}{cc}+\mathrm{\&iota;}& -\mathrm{\&iota;}\\ -\mathrm{\&iota;}& +\mathrm{\&iota;}\end{array}\right]\end{array};---\left(1\right)$

Wherein analysis result can be brought in variable ι, occur that the protuberance point that flat rate is higher represents contour edge, the result vector collection so detected is:

$\left|G_{i,j}\right|=\sqrt{G_x{(i,j)}^2+G_y{(i,j)}^2+G_z{(i,j)}^2};---\left(2\right)$

Vectorial angle θ _i,j=arctan (G _y(i, j)/G _x(i, j)); (3)

${\stackrel{\&OverBar;}{\mathrm{\&theta;}}}_{i,j}=arctan\left(G_z\right(i,j)/G_y(i,j\left)\right);---\left(4\right)$

${\stackrel{\&OverBar;}{\mathrm{\&theta;}}}_{i,j}^{\&prime;}=\arctan \left(G_z\right(i,j)/G_x(i,j\left)\right);---\left(5\right)$

In 3D print procedure, photocurable liquid polymer is sprayed for very thin layer, then solidified by UV (ultraviolet) light.

3. according to the 3D print system applying Embedded PLC a kind of described in claim 1, it is characterized in that: the print procedure of described laser instrument shower nozzle (2): utilize PLC technology logic PLC center system (1) to carry out PLC control, material powder is blown into the high-power laser beam meticulously guided, in 3D print procedure, the powder of laser beam can drop on one side, the powder running into laser spot can melt immediately and be fused to the surface of incremental portion, therefore when laser spot scans crosses the profile of print object, when printhead blows out more powder, parts will increase layer by layer gradually.