CN107498851A

CN107498851A - A kind of seam hidden method of FDM3D printer models

Info

Publication number: CN107498851A
Application number: CN201710620097.XA
Authority: CN
Inventors: 曹杰; 梁旺; 毛立坤
Original assignee: JIANGSU WEIBAOSHI SCIENCE & TECHNOLOGY Co Ltd
Current assignee: Jiangsu Weibaoshi Intelligent Technology Co., Ltd.
Priority date: 2017-07-26
Filing date: 2017-07-26
Publication date: 2017-12-22
Anticipated expiration: 2037-07-26
Also published as: CN107498851B

Abstract

, it is necessary to section in model file import slices software be converted into the formatted file of 3D printer identification, according to the formatted file printing shaping before 3D printer printer model.During in order to avoid printer model, there is jointing line on model；The method of the present invention be the movement locus of each layer of nozzle printing is divided into the Z-axis direction two parts and two parts movement locus floor height it is complementary in the Z-axis direction；This method can be converted into one layer of vertical joint inclination seam, reduce floor height and reach the purpose of concealed joint.

Description

A kind of seam hidden method of FDM3D printer models

Technical field

The present invention relates to a kind of technical field of 3D printer, and in particular to a kind of seam of FDM3D printer models is hidden Method.

Background technology

3D printing, also known as increasing material manufacturing, the technology are will to be extruded after hot melt moulding mixture silk heating and melting from shower nozzle, be deposited on and beat Print on workbench or the cured material of preceding layer, successively print accumulation molding.Print physical model before, model file need through The formatted file that Slice Software is converted into printer identification is crossed, wherein can be to the floor height of model in Slice Software（That is precision）Enter Row selection, the floor height of selection are larger（I.e. precision is relatively low）When the physical model surface printed can produce seam, formed poor Surface quality.

Processing of the Slice Software for model seam at present has two ways：One kind is each layer of seam all close to same Point, another kind are that each layer of seam is dispersed in diverse location.After floor height reaches more than a threshold value, cut into slices using preceding kind of mode Model surface can occur in vertical direction one protrusion scar, after plant slicing mode model surface occur very The pointing object protruded more, causes model surface unsightly and mold strength is poor.

Therefore a kind of scheme is needed to solve the above problems.

The content of the invention

The invention discloses a kind of seam hidden method of FDM3D printer models, cut into slices using the software under this method When one layer of vertical joint or point-like seam can be converted into inclined seam, locus intercepting is divided into two sections of floor height complementation rails Mark, reduce floor height so as to reach the purpose of concealed joint.

The technical scheme is that：

Step 1：Find the starting point O of profile；

Step 2：The length L of locus intercepting is calculated according to floor height, the point on the basis of O, L/2 generates new wheel forward in profile Wide point A, the backward new profile point B of L/2 generations；

Step 3：Merge profile point, generate locus intercepting；

Step 4：Coordinate gradual change of the locus intercepting in Z-direction is handled；

Step 5：Path planning, generate GCODE files.

Track distance and the starting point O to the track road of the profile point B of the starting point 0 to the profile point A Journey is equal.The locus intercepting is BACBA（C is any point among profile）, the floor height of the locus intercepting BACBA is：When Front layer high level-limit layer high level.Shower nozzle BA orbit segments in the locus intercepting BACBA have been walked twice, and walk twice Floor height and track are complementary, and the BA orbit segments are risen to by limit layer high level respectively（Current layer high level-limit layer high level） Place and by（Current layer high level-limit layer high level）Place is dropped at limit layer high level.Printer model is up often passed in the Z-axis direction Increasing one layer just increases a gradual change value as incremental high layer by layer.The calculation of the gradual change value is：Total floor height number/always intercept rail Mark hop count, total floor height number calculate acquisition with total locus intercepting hop count when model conversation is into GCODE files.

Brief description of the drawings

Fig. 1 is a kind of flow chart of the seam hidden method of FDM3D printer models of the present invention.

Fig. 2 is a kind of seam figure of the seam hidden method of FDM3D printer models of the present invention.

Embodiment

The invention will be further described with reference to the accompanying drawings and detailed description.

Refering to shown in Fig. 1 and Fig. 2, the technical scheme is that：

Model file is imported in the Slice Software under this method；

Step 1：Find the starting point O of i-th layer of profile；

Step 2：User's selection needs to print floor height, and the floor height that Slice Software selects according to user calculates the length of locus intercepting L, the point on the basis of O, L/2 generates new profile point A forward in profile, and L/2 generates new profile point B backward；

Step 3：Merge profile point A and profile point B, generation locus intercepting BACBA（C is any point among the profile of track）；

Step 4：Locus intercepting BACBA is handled in the coordinate gradual change of Z-direction, i.e., when model is printed to i+1 layer, i-th High layer by layer+floor height of the gradual change value as i+1 layer（Gradual change value is obtained during model import slices software：Total floor height number/total interception Track hop count）；

Step 5：One is repeated the above steps to step 4, until the superiors of printer model, path planning, generation GCODE texts Part, import 3D printer printing.

Refering to shown in Fig. 2：P1 is the seam schematic diagram for i-th layer of the model that traditional Slice Software changes into figure, and left side is The top view that i-th layer of model, right side are the front view of i-th layer of model, and S1 is the starting point and knot of shower nozzle walking at i-th layer in figure Spot, 2 points overlap and will form a jointing line in the layer at this, and i-th layer of seam can be observed from the front view of model S2, during model constantly prints upwards along Z axis, these points overlapped can connect into a raised jointing line, influence Model surface is attractive in appearance and mold strength.

P2 is the seam schematic diagram for i-th layer of the model that the Slice Software under the inventive method changes into figure, and left side is mould The top view that i-th layer of type, right side are the front view of i-th layer of model, and O is the starting point of lower i-th layer of traditional dicing method, and O ' is biography The terminal of lower i-th layer of dicing method of system, the track distance of starting point 0 to profile point A and starting point O to profile point B track road Journey is equal；In the Z-axis direction, the BA sections in locus intercepting BACBA sections are split as two parts, as shown in right part of flg arrow, A part is risen to by limit layer high level（Current layer high level-limit layer high level）Place, another part by（Current layer high level-pole Limit floor height value）Place is dropped at limit layer high level, i.e. BA orbit segments have been walked twice, and the floor height walked twice and track are mutual Mend, and ACB orbit segments keep former floor height in i-th layer of profile.

Traditional vertical joint can be converted into inclined seam by the algorithm after the improvement, and locus intercepting is layered two sections The complementary track of floor height, reduces floor height and reaches the purpose of concealed joint.

Claims

A kind of 1. seam hidden method of FDM3D printer models, it is characterised in that：Method is：

Step 1：Find the starting point O of profile；

Step 2：The length L of locus intercepting is calculated according to floor height, the point on the basis of O, L/2 generates new wheel forward in profile Wide point A, the backward new profile point B of L/2 generations；

Step 3：Merge profile point, generate locus intercepting；

Step 4：Coordinate gradual change of the locus intercepting in Z-direction is handled；

Step 5：Path planning, generate GCODE files.
A kind of 2. seam hidden method of FDM3D printer models according to claim 1, it is characterised in that：The starting Point 0 to the profile point A track distance are equal with the starting point O to the profile point B track distance.
A kind of 3. seam hidden method of FDM3D printer models according to claim 1, it is characterised in that：The interception Track is BACBA（C is any point among profile）.
A kind of 4. seam hidden method of FDM3D printer models according to claim 3, it is characterised in that：Shower nozzle is in institute State BA orbit segments in locus intercepting BACBA to have walked twice, the floor height and track that the BA orbit segments are walked twice are complementary.
5. the seam hidden method of FDM3D printer models according to claim 3 one, it is characterised in that：The interception Track BACBA floor height is：Current layer high level-limit layer high level.
6. the seam hidden method of FDM3D printer models according to claim 5 one, it is characterised in that：The BA rails Mark section is risen to by limit layer high level respectively（Current layer high level-limit layer high level）Place and by（Current layer high level-limit layer High level）Place is dropped at limit layer high level.
A kind of 7. seam hidden method of FDM3D printer models according to claim 1, it is characterised in that：The Z axis side To coordinate gradual change processing refer to that printer model is up often incremented by one layer and just increases gradual change value as being incremented by the Z-axis direction It is high layer by layer.
A kind of 8. seam hidden method of FDM3D printer models according to claim 7, it is characterised in that：The gradual change The calculation of value is：Total floor height number/total locus intercepting hop count.
A kind of 9. seam hidden method of FDM3D printer models according to claim 8, it is characterised in that：Total layer High number and total locus intercepting hop count calculate acquisition when model conversation is into GCODE files.