CN105881917A

CN105881917A - 3D (three-dimensional) printing slicing method

Info

Publication number: CN105881917A
Application number: CN201610477268.3A
Authority: CN
Inventors: 任建锋; 黄启泰; 王毅; 倪颖
Original assignee: Suzhou University
Current assignee: Suzhou University
Priority date: 2016-06-27
Filing date: 2016-06-27
Publication date: 2016-08-24
Anticipated expiration: 2036-06-27
Also published as: CN105881917B

Abstract

The invention discloses a 3D (three-dimensional) printing slicing method. The 3D printing slicing method is characterized by including (1), establishing a three-dimensional model of a product to be printed through computer-aided design software; (2), subjecting the three-dimensional model to slicing treatment and dividing the model into a plurality of slices vertically, wherein at least part of slices form curved surface layers, intersecting lines of the curved surface layers and vertical sections are curves in sine distribution, and regular and even peak-valley distribution is formed on a slice curved surface; (3), printing the model hierarchically according to hierarchical slice information obtained according to the step (2). The 3D printing slicing method is capable of enhancing strength of a device obtained from 3D printing and achieving model reconstruction without changing intrinsic cohesiveness of a material.

Description

A kind of 3D The dicing method printed

Technical field

The present invention relates to a kind of rapid shaping technique, be specifically related to a kind of model layers dicing method in 3D prints.

Background technology

3D prints, and also referred to as increases material manufacture, is the one of rapid shaping technique.This technology based on mathematical model file, use powdered-metal or plastics etc. can jointing material or light-sensitive material, carry out constructed object by the way of (or solidification) by successively printing and bond.It is can to meet individual requirements for the complicated or the most personalized production of high accuracy that 3D prints maximum feature, and 3D is printed upon cost, technology realizes in difficulty more very one and raises.Meanwhile, because being to increase material manufacture, being nearly free from waste material in production, stock utilization usually can reach more than 90%.Therefore, 3D is printed upon manufacturing exemplar and mould aspect, has the advantage that can not be substituted.

The principle using 3D printing technique implementation model to print is: on some direction, with abundant section, threedimensional model is subdivided into the thickness that can print, and obtain cutting into slices on each layer all profile informations intersected with model, calculates printing path；According to printing path, by the successively accumulation of printed material is bondd (solidification), by model reconstruction out.

In prior art, as shown in Figure 1, cutting into slices as planar slice, the research to the microtomy that 3D prints, the thickness being concentrated mainly on section selects, and hierarchical algorithm mainly has even laminating and adaptive layered two kinds.Wherein, adaptive layered is the surface complex situations according to object, is automatically changed the lift height of model so that the lift height that complicated surface has is less, and the lift height that simple surface has is bigger.Such as, Chinese invention patent application CN104708824A discloses the 3D of a kind of reserving model feature and prints self-adapting slicing method, whether the section judged in slicing profile information on arbitrary neighborhood two layer height by feature existence condition there may exist feature, if there may exist feature, then use minimum lift height that the model data between section carries out secondary section, thus improve printing precision as far as possible on the premise of reducing hierarchy number.Therefore, section of the prior art is planar slice, and the research to section is concentrated mainly in the thickness selection of section.

But, for using the 3D of bonding mode molding to print, a difficult point is the insufficient strength of the 3D print device obtained, particularly interfacial bonding strength existing problems.For improving intensity, conventional thinking is to improve the caking property of material itself.But, in the case of not considering the caking property of material own, if it is possible to improve the intensity of print device, the application printed for 3D will produce material impact.

Summary of the invention

The goal of the invention of the present invention is to provide the dicing method that a kind of 3D prints, and by the improvement to dicing method, improves the intensity of 3D print device.

To achieve the above object of the invention, the technical solution used in the present invention is: the dicing method that a kind of 3D prints, and comprises the following steps:

(1) computer aided design software is used to set up the threedimensional model of product to be printed；

(2) described threedimensional model is carried out slicing treatment, model is vertically separated into several sections, cutting sheet is curved surface, described lth layer and the curve that intersection is Sine distribution form of the tangent plane of vertical direction, and section curved surface is formed rule, the distribution of uniform peak-to-valley；

(3) the hierarchy slicing information obtained according to step (2), successively printer model.

In practical operation, it is possible to specify ad-hoc location is as sinusoidal central point, when printing using this central point as anchor point.All sections of model are constituted by lth layer.

Section is overall dimensions based on model and with internal structure is unrelated.

In technique scheme, the Breadth Maximum of model is D, and the height of model is H, and the amplitude of described sine curve or cosine curve is A, and the cycle is d, and thickness is h, as H/D 1, and A 2h, d 4h, when H/D≤1, h≤2A≤2h, 2h≤d≤4h.

In technique scheme, described section has a spatial sinusoidal curved surface, and the intersection of described spatial sinusoidal curved surface and at least one pair of mutually orthogonal tangent plane is all in Sine distribution, and curved surface is smooth, there is peak, a paddy in cycle d.Thus, the peak and valley that the sine curve of adjacent area is constituted is alternately distributed.Peak-to-valley is alternately distributed, and strengthens lateral bonding force, thus increases 3D and print the intensity of part.

In technique scheme, the thickness of every layer of section is identical.

In being projected by the bottom surface of printing objects, when all directions vary in size, different directions is used not wait the mode in cycle to cut into slices.Preferably, described curved surface has no less than 4 cycles on each direction along the horizontal plane.

Owing to technique scheme is used, the present invention compared with prior art has the advantage that

1, the thinking framework of planar slice is used during the present invention breaches conventional art, creatively introduce sine surface and constitute the curved surface of section, unique uniform peak-to-valley distribution considerably increases the contact surface of adjacent interlayer, on the premise of not changing the caking property of material own, considerably increase 3D and print the intensity of the device obtained.Sine surface has smooth characteristic, does not increase equipment and runs difficulty.

2, in the same slicing layer of the present invention, thickness is equal, and the discharge method of 3D printer is identical with the discharge method of conventional planar slicing mode, will not increase manufacture difficulty.

3, present invention employs the sine curve main body constitution element as curved surface, curved surface has extremely strong regularity, it is simple to implementation model reconstructs.

4, the cycle of sine surface orthogonal direction, amplitude and thickness are adjustable, it is simple to according to technique adjustment printing solution, in order to obtain the strongest part.

Accompanying drawing explanation

Fig. 1 is piece cutting structure schematic diagram of the prior art；

Fig. 2 is the piece cutting structure schematic diagram of the embodiment of the present invention one；

Fig. 3 is the face cutting distribution schematic diagram of the section in embodiment one；

Fig. 4 is the schematic diagram of the period profile such as not in embodiment two；

Fig. 5 is the structural representation of embodiment three.

Detailed description of the invention

Below in conjunction with the accompanying drawings and embodiment the invention will be further described:

Embodiment one: shown in Figure 2, the dicing method that a kind of 3D prints, comprise the following steps:

(1) software for calculation is used to set up the threedimensional model of product；

(2) described grid model file being carried out slicing treatment, model is vertically separated into several sections, cutting sheet is curved surface, and described lth layer is sine curve in the boundary line of the lth layer in the cross section Yu contiguous slices that are perpendicular to slice direction；

(3) hierarchical information obtained according to step (2), successively prints.

Seeing accompanying drawing 2, the Breadth Maximum of model is D, and the height of model is H, and the amplitude of described sine curve or cosine curve is A, and the cycle is d, and thickness is h, A 2h, the d 4h as H/D 1, when H/D≤1, and h≤2A≤2h, 2h≤d≤4h.

See accompanying drawing 3, for the face cutting distribution schematic diagram of section in embodiment.From same, in the present embodiment, the peak and valley that the sine curve face of adjacent area is constituted is alternately distributed.

In the present embodiment, the thickness of every layer of section is identical.In practical operation, it is possible to specify ad-hoc location is as sine curve or the central point of cosine curve, when printing using this central point as anchor point.

Embodiment two: the dicing method that a kind of 3D prints, step is similar with embodiment one, wherein, seeing shown in accompanying drawing 4, for the circle of equal altitudes of section, dark parts part represents peak value, light-colored part represents valley, in being projected by the bottom surface of printing objects, all directions vary in size, and use different directions not wait the mode in cycle to cut into slices.

Embodiment three: the dicing method that a kind of 3D prints, partially sliced in model is made up of lth layer, partially sliced is made up of plane layer, and the section one side connecting sheet is curved surface, and another side is plane.As shown in Figure 5, during printing, first can stamp basal layer at bottom one layer, then print planar slice with usual manner.The when of so printing, although printing mechanism is according to plane motion, and the face finally actually generated is curve form.Shape according to model and requirement of strength, select different section fit forms, to promote print speed.

Claims

1. the dicing method that a 3D prints, it is characterised in that comprise the following steps:

The dicing method that 3D the most according to claim 1 prints, it is characterised in that: the Breadth Maximum of model is D, and the height of model is H, and sinusoidal amplitude is A, cycle is d, and thickness is h, as H/D 1, and A 2h, d 4h, when H/D≤1, h≤2A≤2h, 2h≤d≤4h.

The dicing method that 3D the most according to claim 1 prints, it is characterised in that: described section has spatial sinusoidal curved surface characteristic, and curved surface is smooth, there is peak, a paddy in cycle d.

The dicing method that 3D the most according to claim 1 prints, it is characterised in that: the thickness of every layer of section is identical.

The dicing method that 3D the most according to claim 2 prints, it is characterised in that: in being projected by the bottom surface of printing objects, when all directions vary in size, use different directions not wait the mode in cycle to cut into slices.

The dicing method that 3D the most according to claim 5 prints, it is characterised in that: described curved surface has no less than 4 cycles on each direction along the horizontal plane.