Large prototype makes medium collateral processing technique quickly

1 Mm ～ 0.

The layer accumulation of 2 Mm becomes the prototype that has certain measure, how improving treatment efficiency to this is a of fast figuration technology main task all the time, also be fast figuration technology the strike is large the main obstacle that change, accordingly, use why to plant fast figuration craft, use thought of what kind of design to become the first issue that designs large and archetypal production system. The treatment efficiency of craft of 1 typical and fast figuration becomes form craft to use the craft principle that disperse piles up quickly quite. According to its of unit of the smallest figuration different, can be its cent different figuration kind: Some makes a line by the dot, make a range by the line again, by the face accumulation is body finally, its are the smallest figuration unit is a dot; Some makes a range by the line, make system by the face again, its are the smallest figuration unit is a line; Some direct figuration one, by the layer accumulation is three-dimensional substance, its are the smallest figuration unit is a face. Unit of apparent the smallest figuration is bigger, figuration efficiency is taller. A few kinds of typical figuration pattern see a table quite 1. The kind of figuration craft figuration that expresses a few kinds of 1 models compares <DIV></DIV> 　 of LOM<DIV></DIV> of area of area of SLS of line of line of point of point of craft of model of fashion of figuration of unit of the smallest figuration, line, face, body BPM, 3DP, face, body, SLA, MEM, body a few kinds of models. Express a few kinds of 2 typical craft to machine space of figuration of equipment of efficiency estimation <DIV></DIV> (Mm) of × of Mm × Mm 1) figuration time (time of figuration of prototype of 1m of × of S)1m × 1m (day) SLS-2500381 × 500 × of × of 330 × 40430122SLA-500500 559 × of 5849092LOM-2030H813 × : A dimension is 1)SLS, SLA 100 Mm × of 100 Mm × 0.

1mm; A dimension is LOM, FDM 200 Mm × of 200 Mm × 0.

1mm. The figuration means of a few kinds of typical craft compares above, and the estimation of figuration time proves statified and hypostatic workmanship (LOM) regard the smallest figuration as the unit with the face, have highest figuration efficiency, most agree with produce large size prototype. 2 divisional and collateral processing technique are in all sorts of fast figuration craft, statified and hypostatic workmanship has highest treatment efficiency, but existing LOM craft still puts in 2 problems: The prototype of 1 M of × of 1 M of × of a 1 M needs ① figuration 16 days, efficiency is too low still; The large and archetypal size that ② needs actually is larger, be like 1 M of × of 2 M of 1 M × , because this needs new design idea, improve treatment efficiency further. In LOM craft, machine a needs time to comprise by 2 parts: One part is scanning handling time (treatment of frame of ＋ of fill of reseau of outline treatment ＋ , occupy about 80% ) ; One part is treatment preparation time (workbench of ＋ of hot pressing of ＋ taking paper is adjusted) . Was based on this article to put forward divisional and collateral treatment to devise an idea, be about to machine plane to break up to machine area, much stage scanner is collateral treatment, the treatment efficiency that can improve fast figuration substantially so (see a picture 1) . Graph graphic representation of 1 divisional and collateral treatment breaks up area of a rectangular treatment the handling time estimation that machines area for two to see a table 3, if use collateral processing technique, treatment efficiency can raise about 40 ％ . Express unit of 　 of 　 of 　 of 　 of 　 of 　 of 　 of estimation of efficiency of 3 divisional and collateral treatment: 1m of × of 1m of × of 1m of day <DIV></DIV> handling time is not 1m of × of 1m of × of collateral treatment 1m 1m of × of 2m of × of collateral treatment 1m is not 1m of × of 2m of × of collateral treatment 1m × of 2m of × of collateral treatment 1m 0.

Handling time of scanning of 5 M collateral treatment 12.

86.

425.

612.

86.

4 treatment plan time 3.

23.

2552.

5 total handling time 169.

630.

617.

88.

The crucial technology of collateral treatment analyses 9<DIV></DIV>3 partition 　 uses collateral processing technique to want to solve two problems above all: ① has the geometrical data of a spare parts breaking up; ② how 2 scanning device runs paralell the job. 3. Of data of geometry of 1 spare parts break up data of fast figuration technology to handle a process to see graph 2a commonly, cent is 5 phase. Graph the 　 of data processing process in technology of 2 fast figuration (all sorts of CAD modelling software all offerred 1)CAD modelling phase to break up a function hypostaticly, but the new border that forms 2 entity in intersected border point. Be in attrib border place to will repeat scanning 2 times so, and this should be not machined originally. (Disperse of triangle of surface of 2)CAD hypostatic model is changed generate STL file to cannot undertake breaking up to STL file. (File of 3) general STL is statified create the CLI file need as a result of next fill, contour line must be the many justice line that close, to make contour line closes, in break up place need to increase 2 not to answer originally some line segment, the place that same meeting should not machine in border increases 2 scanning beam. (The CLI file after 4) undertakes to CLI file fill gets stuff can is opposite the CLI file after fill undertakes breaking up, because had done not have the requirement that contour line must close right now, be in attrib border place to be able to maintain former appearance, because of data of geometry of this pair of spare partses break up the CLI file after fitting pair of stuff to undertake. (5) changes the CLI file after fill amount to to accuse code file to cannot undertake breaking up to file of numerical control code, and generate in numerical control code be opposite hard likewise in the process data undertakes breaking up. The place on put together is narrated, undertake breaking up to the CLI file after fill, can maintain the former appearance that breaks up attrib border place on one hand, have very good adaptability on the other hand, can undertake breaking up to any data. The data processing process of divisional and collateral processing technique sees graph 2b. Above is analysed but reduce watch is shown 4 times. Express spare parts of process of data processing of technology of 4 fast figuration to break up feasibility to analyse <DIV></DIV> data form whether break up the border after breaking up to be in whether maintain model of substance of former appearance CAD whether STL file is denied deny CLI file whether file of fill hind CLI can can NC code file is denied deny.

Device of many 2 scanning is collateral working implementation scans many sets the another crucial question that the collateral work that processes unit is divisional and collateral processing technique. Can use distributed control system to solve this problem (3) seeing a picture. Control 2 scanning apparatus respectively with 2 controller, this controller has enough memory, have alone CPU, can repair file of numerical control code independently independently. Add man-hour in scanning so, labour accuses machine the treatment code that transmits to each controller, each controller tiring-room works, 2 scanning device is collateral treatment. The graph scans 3 pairs block diagram of distributed control system processes unit of prototype of 4 small lot at the same time the large and archetypal production system that uses divisional and collateral processing technique, can produce large size prototype not only, and the technology discharging appearance that can use a part machines the part with many minor dimension at the same time. On one hand can the utilization rate that utmost land raises raw material, can improve the production efficiency of fast figuration system on the other hand. Process of its data processing sees a picture 4. Above all classics CAD modelling, the many STL document that turns exterior disperse has reasonable platoon kind, amalgamative for file of a STL; Have this file statified the CLI file after fill operation gets stuff, have this CLI file breaking up, collateral treatment plan machines 5 conclusion 　 of spare parts of 4 small lot at the same time (1) large prototype is the fundamental requirement with new fields of a lot of application of fast figuration technology, development can make the fast prototype of large prototype make a system have good market prospect. (The main difficulty that 2) develops large prototype to make a system quickly is the treatment efficiency that how improves production system, use statified and hypostatic workmanship (LOM) reaching divisional and collateral processing technique is the efficient way that improves treatment efficiency substantially. (3) partition is collateral 2 crucial technologies of processing technique, namely of data of spare parts geometry breaking up the collateral work that covers scanning plant with how is feasible. (4) uses collateral processing technique to be able to produce large prototype not only, and can machine many spare partses at the same time, can raise the utilization rate of raw material already, can improve treatment efficiency again. CNC Milling