CN1284662C

CN1284662C - Method for fabricating prototype of object

Info

Publication number: CN1284662C
Application number: CN 200410040766
Authority: CN
Inventors: 罗春晖
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-30
Filing date: 2004-09-30
Publication date: 2006-11-15
Anticipated expiration: 2024-09-30
Also published as: CN1600525A

Abstract

The present invention discloses a method for fabricating the prototype of an object. The method comprises the main steps: the outline drawing of the object is drawn by graphics software, a three-dimensional drawing is cut by special software, a cut two-dimensional drawing is converted to black and white negative images which are printed on a film, and then the film is transported below an ultraviolet baking lamp above a resin barrel; a worktable is upwards moved to a position which is one slice thickness away from a liquid level, and the baking lamp is opened to make ultraviolet light penetrate through the transparent parts on the film, so that the resin on the worktable is solidified; next, the worktable is descend by one slice thickness, and the baking lamp works until components are shaped. By the method, the cost of the equipment for fabricating the prototype of the object is much lower than that of the equipment of the existing prototype fabricating technology.

Description

A kind of manufacture method of object prototype

Technical field

The present invention relates to a kind of no mould RP technique, specifically a kind of method of utilizing photosensitive liquid phase curing mode and layering manufacturing principle to make the object prototype fast.

Background technology

RP technique is the organic integration of CAD, Numeric Control Technology, laser technology, Materials Science and Engineering technology, it can turn materially design philosophy the prototype with certain 26S Proteasome Structure and Function automatically, quickly and accurately, thereby enterprise before formally putting on market, is extensively investigated product, seek the opinion of consumers' opinions, and product design estimated fast, revises, with the response market demand, improve Enterprises'Competitiveness.

Existing ripe prototype manufacturing technology has stereosopic printing moulding, laminated entity manufacturing, select that the territory is laser sintered, fusion sediment moulding, three-dimensional spray-painting are bonding, welding fabrication and mask lithography, though these technology can reach enterprise's requirement on the accuracy of manufacture, but because device therefor cost too high (how at hundreds of thousands between millions of), therefore can't popularize in a large number and use in enterprise.

In the above-mentioned RP technique, with the immediate technology of the present invention be mask lithography.Mask lithography is made the object prototype by making laser or X ray pass the light irradiation resin forming that salts down behind the film, pattern on the photomask is to salt the film machine down under model lamella parameter control, utilizes the telelectroscope technology is mixed colours on plate glass or the static air brushing is made prototype or part section figure.At present the price of photomask machine at hundreds of thousands between millions of, the general unable purchase of enterprise, and the charge of making the photomask center of object prototype specially generally is to calculate by the weight resin that making object prototype is consumed, therefore an object prototype is made as entrusting the photomask center, and its expense is the comparison costliness.

Summary of the invention

The object of the present invention is to provide a kind of manufacture method of object prototype, the cost of making object prototype device therefor with this method is significantly less than the cost that has prototype manufacturing technology device therefor now

For achieving the above object, the invention provides a kind of manufacture method of object prototype, this method comprises the steps: that (1) at first use the outline drawing of mapping software drawing three-dimensional object, use special-purpose software that this graphics is pressed identical thickness cutting successively along same direction then, the thickness of cutting is selected according to the shape and the desired accuracy of manufacture of object; (2) X-Y scheme that will segment that uses a computer converts the black and white negative-appearing image to, and add the location recognition figure that to be differentiated by alignment system thereon, then with printer with black and white negative-appearing image and location recognition graphic printing on transparent film, the shape in or certain cross section identical as the shape in the continuous cross section of object is identical with the shape in certain cross section that the front occurred, and then printer is only printed a black and white negative-appearing image figure; (3) film is transferred to the top of resin bucket by transfer system, on the Region control sheet, alignment system is by the location recognition figure on the identification film, driving transmission system is accurately located, described Region control sheet is made up of a plurality of opaque and white thin slices, can manually or automatically adjust, its effect is the consumption that reduces ink or ink powder, and the workbench of energy lifting under jacking system control is arranged in the described resin bucket; (4) after film is accurately located, the startup light-cured resin adds heat-extraction system makes its light-cured resin of annotating in the resin bucket, and use fluid level detection system to detect the height that the resin liquid level arrives, when reaching the height that needs, stop filling, it just in time is the position of slice thickness that workbench is risen to apart from the resin liquid level, turn on the roasting lamp of the ultraviolet ray that is positioned at resin bucket top this moment, because transparent film upper section shape partly is transparent, therefore ultraviolet light passes the transparent part of film, light-cured resin on the workbench is solidified, extinguish the roasting lamp of ultraviolet then; (5) operation film recovery system reclaims film, and next film is passed to resin bucket top by transfer system, make the workbench slice thickness that descends again simultaneously, repeat (4) step, identical as the shape in the continuous cross section of object, after the roasting lamp exposure of then each ultraviolet, workbench descends, film is motionless, has identical cross section as object, and then the film that is reclaimed by the film recovery system can be passed the use of resin bucket top back again by transfer system; (6) constantly repeat above-mentioned steps, make the light-cured resin stack from level to level of solidifying, up to finishing moulding.

The present invention compared with prior art has following effect: (1) is as adopting monochromatic laser printer, resolution ratio is 600 * 1200DPI's, price is between thousand yuan to ten thousand yuan, as to adopt resolution ratio be the ink-jet printer of 4800 * 1200DPI, then price is between hundreds of unit is to several thousand yuan, add other device, the cost of device therefor of the present invention can be controlled in 20,000 yuan, price can be above 100,000 yuan, and the price of photomask machine at hundreds of thousands between millions of, therefore the price of device therefor of the present invention is easily popularized and use in enterprise in a large number well below the price of existing prototype manufacturing technology device therefor; (2) because most of object is identical in the shape of certain direction upper section mostly, so the quantity of actual fabrication time institute printing film is less, thereby use cost is lower, is easily accepted by enterprise; (3) this method is used simple, convenient.

Below in conjunction with drawings and Examples the present invention is described in further detail.

Description of drawings

Fig. 1 is the film graph of embodiment 1 middle gear.

Fig. 2 is the outline drawing of part described in the embodiment 2.

Fig. 3 is the film graph of part A partial cross section among Fig. 2.

Fig. 4 is the film graph of part B partial cross section among Fig. 2.

The specific embodiment

Embodiment 1, makes the prototype of gear shown in Figure 1.

At first draw out the graphics of gear with computer and mapping software, use special software with this graphics cutting then, re-use computer and convert the X-Y scheme that segments to the black and white negative-appearing image, and add the location recognition figure that to be differentiated by the photoelectric sensor in the alignment system thereon, then with printer with black and white negative-appearing image and location recognition graphic printing on transparent film, because when gear is pressed the cross-sectional direction cutting, the shape in all cross sections is identical, therefore only need to print a black and white negative-appearing image figure (as shown in Figure 1), then this black and white negative-appearing image figure is referred to the top transmission of bucket to tree by transfer system, when arriving resin bucket top, photoelectric sensor in the alignment system detects the location recognition figure, stop to drive, the outer white space of negative-appearing image figure blocks with the Region control sheet on the film, can save the consumption of ink or ink powder like this, starting light-cured resin then adds heat-extraction system make its light-cured resin of annotating in the resin bucket, and detect the height that the resin liquid level arrives by fluid level detection system, when reaching the height that needs, stop filling, it just in time is the position of slice thickness that workbench is risen to apart from the resin liquid level, turn on the roasting lamp of the ultraviolet ray that is positioned at resin bucket top this moment, cross sectional shape partly is transparent because transparent film cogs, therefore ultraviolet light passes the film transparent part, light-cured resin on the workbench is solidified, extinguish the roasting lamp of ultraviolet then, with the workbench slice height that descends again, roasting lamp is task again, till reaching gear forming.Behind the gear forming, the emptying resin, the film recovery system reclaims film automatically.

Embodiment 2, make part prototype shown in Figure 2.

At first draw out the graphics of part with computer and mapping software, use software to press the minimum mode cutting graphics of number of cross sections then, because this part is actually (Fig. 3 that the cross section by two kinds of shapes is formed by stacking, Fig. 4 is the shape that is printed on two kinds of cross sections on the transparent film), so when making, earlier transparent film shown in Figure 3 is sent to resin bucket top by transfer system, on the Region control sheet, the outer white space of negative-appearing image figure is blocked by the Region control sheet on the film, camera in the alignment system is photographed the position of 4 anchor points on Fig. 3, be recorded into computer, light-cured resin adds heat-extraction system begin the light-cured resin of annotating in the resin bucket then, resin liquid level height detection system detects resin and reaches when needing height, stop filling, workbench is risen to apart from slice thickness of liquid level, change the roasting lamp of ultraviolet, the transparent place of film is passed in ultraviolet ray, cured resin, then extinguish roasting lamp, make the workbench slice thickness that descends again, roasting lamp is task again, till the height manufacturing in the cross section of this shape finishes, the film recovery system reclaims film shown in Figure 3 automatically then, at this moment printer prints goes out film shown in Figure 4, film shown in Figure 4 is sent to resin bucket top, camera in the alignment system is photographed the position of 4 anchor points on Fig. 4, and compare with 4 anchor points on Fig. 3, calculate difference, control the accurate contraposition of transfer system thus, workbench rises to apart from slice thickness of liquid level then, turn on the roasting lamp of ultraviolet, the transparent place of film is passed in ultraviolet ray, with resin solidification, extinguish roasting lamp, make the workbench slice thickness that descends again, roasting lamp is task again, till the height manufacturing in the cross section of this shape finishes, last emptying resin, the film recovery system reclaims film automatically, and the whole part manufacturing finishes.

In the foregoing description, three-dimensional drawing software and two-dimensional graphics software all are existing on the market software, and three-dimensional drawing software can be selected Pro/E for use, and two-dimensional graphics software can be selected Magics.RP.V7.0 for use, also can use other software.

Claims

1. the manufacture method of an object prototype is characterized in that it comprises the steps:

(1) with the outline drawing of mapping software drawing three-dimensional object, use special-purpose software that this graphics is pressed identical thickness cutting successively along same direction then, the thickness of cutting is selected according to the shape and the desired accuracy of manufacture of object;

(2) X-Y scheme that will segment that uses a computer converts the black and white negative-appearing image to, and add the location recognition figure that to be differentiated by alignment system thereon, then with printer with black and white negative-appearing image and location recognition graphic printing on transparent film, the shape in or certain cross section identical as the shape in the continuous cross section of object is identical with the shape in certain cross section that the front occurred, and then printer is only printed a black and white negative-appearing image figure;

(3) film is transferred to resin bucket top by transfer system, on the Region control sheet, alignment system is by the location recognition figure on the identification film, driving transmission system is accurately located, described Region control sheet is made up of a plurality of opaque and white thin slices, can manually or automatically adjust, the workbench of energy lifting under jacking system control is arranged in the described resin bucket;

(4) after film is accurately located, the startup light-cured resin adds heat-extraction system makes its light-cured resin of annotating in the resin bucket, and detect the height that the resin liquid level arrives by fluid level detection system, when reaching the height that needs, stop filling, it just in time is the position of slice thickness that workbench is risen to apart from the resin liquid level, turn on the roasting lamp of the ultraviolet ray that is positioned at resin bucket top this moment, because transparent film upper section shape partly is transparent, therefore ultraviolet light passes the transparent part of film, light-cured resin on the workbench is solidified, extinguish the roasting lamp of ultraviolet then;

(5) operation film recovery system reclaims film, and next film is passed to resin bucket top by transfer system, make the workbench slice thickness that descends again simultaneously, repeat (4) step, as the shape in the continuous cross section of object when identical, after the roasting lamp exposure of each ultraviolet, workbench descends, film is motionless, have identical cross section as object, then the film that is reclaimed by the film recovery system can be passed resin bucket top again back by transfer system and use so continuous repetition, the light-cured resin that solidifies stack from level to level is until finishing moulding.