CN102615281A - Regional mobile light source scanning system for laser rapid prototyping technology - Google Patents

Abstract

The invention provides a regional mobile light source scanning system for a laser rapid prototyping technology. The system comprises a regional mobile platform, wherein the regional mobile platform is fixed in a working shell and arranged above a workpiece cavity; a linear motor platform of the regional mobile platform is suspended above the workpiece cavity through a connecting piece; a scanning platform is fixed on the linear motor platform; a reflector of the scanning platform is positioned above a laser and a scanning mirror; the laser is positioned on the right of the scanning mirror; a computer with a scan control program is connected with the scanning platform through a mirror control card, and connected with the linear motor platform through a motion control card; before scanning, part data is input into the computer for partitioning, and is subjected to scan filling processing to determine whether a current region has data to be scanned or not, until all data are scanned. According to the regional mobile light source scanning system, the prototyping size of the laser rapid prototyping system is increased, and simultaneously high prototyping accuracy is maintained.

Description

A kind of subregion portable light source scanning system that is used for the laser fast forming technology

Technical field

The invention belongs to parallel quick shaping manufacturing technology field, be specifically related to a kind of subregion portable light source scanning system that is used for the laser fast forming technology.

Technical background

The laser fast forming technology is shone moulding material through the control laser instrument based on the cad data of the mold elements of reading in, and after current layer is accomplished making, adds the material that need be shaped, and reirradiation is made to accomplishing part.

Scanning system is as the important component part of laser fast forming technology; Profiled member size, forming efficiency and quality to whole system have crucial effects; Yet existing rapid prototyping system adopts the single sweep device mostly, can't the one-shot forming large-scale part.The proposition of the parallel processing of subregion notion preferably resolves the making problem of large-scale part, and for example name is called " the parallel processing unit (plant) of subregion that is used for rapid shaping ", application number is: 98219120.0 patent, but be not suitable for laser fast shaping processing.The appearance of multiple light courcess subregion parallel scanning system has solved the problem that laser fast shaping mechanism is made large-scale part well; For example; Name is called " a kind of forming material powder system ", application number is: 200610018754.5 patent; But the problem that this scanning system exists is: use many cover laser instruments, scanning galvanometer meeting to cause the rapid forming equipment cost to increase considerably because of itself fetch long price; Simultaneously, overlap the design difficulty that scanning system has not only increased rapid forming equipment more, also make the light path plate bulk and the load-carrying of carrying these scanning systems become big.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art; The object of the present invention is to provide a kind of subregion portable light source scanning system that is used for the laser fast forming technology; On the basis that does not increase the laser fast forming equipment cost; Realize the subregion scanning of laser fast forming, increase the forming dimension of laser fast forming system, possess high forming accuracy simultaneously.

In order to achieve the above object, the technical scheme taked of the present invention is following:

A kind of subregion portable light source scanning system that is used for the laser fast forming technology; The workpiece chamber 9 that comprises the subregion moveable platform, piston 10 is housed, the subregion moveable platform is fixed in the work housing 6, and is disposed at 9 tops, workpiece chamber; The subregion moveable platform comprises linear electric motors platform 1 and scanning platform 5; Linear electric motors platform 1 is suspended from the top in workpiece chamber 6 through connector, and scanning platform 5 is fixed on the linear electric motors platform 1, and scanning platform 5 comprises laser instrument 3, scanning galvanometer 4 and speculum 2; Speculum 2 is positioned at the top of laser instrument 3 and scanning galvanometer 4; Laser instrument 3 is positioned at the right of scanning galvanometer 4, and a fanout that contains the scan control program links to each other with the control end of scanning platform 5 through the galvanometer control card, links to each other with the control end of linear electric motors platform 1 through motion control card simultaneously.

Described scan control program package contains a zoning ordinance, and zoning ordinance is:

(1) reads current cross section contour information, and draw current cross section contour full-size length H on horizontal X and vertical Y direction _X, H _Y, make H _X, H _YD does division arithmetic with the vibration mirror scanning regional diameter, and the result is designated as Z _X, Z _Y, set up bracket function N _X=[Z _X] and N _Y=[Z _Y], set up fractional part function M _X={ Z _X∈ [0 ,+∞) and M _Y={ Z _Y∈ [0 ,+∞);

(2) L ₁Be the tangent line of the cross section contour left end parallel, be directions X subregion original bench mark line with the Y axle; L ₂Being the tangent line of the cross section contour right-hand member parallel with the Y axle, is that the directions X subregion stops datum line; L ₃Be the tangent line of the cross section contour lower end parallel, be Y direction subregion original bench mark line with the X axle; L ₄Being the tangent line of the cross section contour parallel with X axle upper end, is that Y direction subregion stops datum line;

(3) with tangent line L ₁Be the subregion starting point, with tangent line L ₃Being datum line under the subregion, is the zoning length of side with D, divides N at directions X successively _XIndividual zone; With tangent line L ₂Be the subregion starting point, with tangent line L ₃Being datum line under the subregion, is single regional length of side with D ,-1 zone of directions X division, the first row directions X subregion is accomplished, wherein N _XIndividual zone and N _X+ 1 region overlapping partial-length is L _X=D-M _X

(4) with tangent line L ₃Along Y direction translation D successively, 2D ... (N _Y-1) D length, and, repeat subregion step (3) successively successively as datum line under the new subregion, accomplish secondary series, the 3rd row ... N _YRow directions X subregion; With tangent line L ₄Be datum line on the new subregion, repeat subregion step (3), accomplish N _Y+ 1 row directions X subregion, wherein N _Y+ 1 row directions X subregion and N _YRow directions X subregion lap width is L _Y=D-M _Y

The present invention compared with prior art has following outstanding advantage: when guaranteeing precision, only use a cover scanning system to realize the one-shot forming of large-scale part, reduced equipment cost and complexity.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a light source scanning system works schematic diagram of the present invention.

Fig. 3 is the subregion principle schematic.

Among the figure: 1-linear electric motors platform; The 2-speculum; The 3-laser instrument; The 4-scanning galvanometer; The 5-scanning platform; The 6-housing of working; 7-vibration mirror scanning zone; The 8-workbench; The 9-working chamber; The 10-piston.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is carried out detailed explanation.

With reference to Fig. 1, a kind of subregion portable light source scanning system that is used for the laser fast forming technology, the workpiece chamber 9 that comprises the subregion moveable platform, piston 10 is housed; The subregion moveable platform is fixed in the work housing 6; And be disposed at 9 tops, workpiece chamber, and the subregion moveable platform comprises linear electric motors platform 1 and scanning platform 5, linear electric motors platform 1 is suspended from the top in workpiece chamber 6 through connector; Scanning platform 5 is fixed on the linear electric motors platform 1; Scanning platform 5 comprises laser instrument 3, scanning galvanometer 4 and speculum 2, and speculum 2 is positioned at the top of laser instrument 3 and scanning galvanometer 4, and laser instrument 3 is positioned at the right of scanning galvanometer 4; A fanout that contains the scan control program links to each other with the control end of scanning platform 5 through the galvanometer control card, links to each other with the control end of linear electric motors platform 1 through motion control card simultaneously.

Operation principle of the present invention is:

With reference to Fig. 2; Before beginning scanning; Part C AD data are input to the data processor in the computer, and this data processor carries out subregion according to zoning ordinance, and each regional size is by 7 decisions of vibration mirror scanning zone; In file independently, the line scanning of going forward side by side is filled and is handled with the storage behind the subregion; Then, scanning imaging system reads in the partition data file, and judges in current region, whether to exist data to scan; If exist, then carry out current data scanning, if there is not corresponding data; Then through other data distributed areas in the control software search layer, the zone that the chosen distance current location is nearest also moves to this zone through the subregion mobile platform with scanning platform 5, uses laser to carry out processing and fabricating then; This layer data machines; The bed thickness height that piston 10 descends and sets carries out the filling of manufacturing materials at the upper surface of workbench 8, makes repeatedly up to the scanning of accomplishing total data.

Described scan control program package contains a zoning ordinance, and with reference to Fig. 3, Fig. 3 is the zoning ordinance principle schematic, and zoning ordinance is:

(1) reads current cross section contour information, and draw current cross section contour full-size length H on horizontal X and vertical Y direction _X, H _Y, make H _X, H _YD does division arithmetic with the vibration mirror scanning regional diameter, and the result is designated as Z _X, Z _Y, set up bracket function N _X=[Z _X] and N _Y=[Z _Y], set up fractional part function M _X={ Z _X∈ [0 ,+∞) and M _Y={ Z _Y∈ [0 ,+∞);

(2) L ₁Be the tangent line of the cross section contour left end parallel, be directions X subregion original bench mark line with the Y axle; L ₂Being the tangent line of the cross section contour right-hand member parallel with the Y axle, is that the directions X subregion stops datum line; L ₃Be the tangent line of the cross section contour lower end parallel, be Y direction subregion original bench mark line with the X axle; L ₄Being the tangent line of the cross section contour parallel with X axle upper end, is that Y direction subregion stops datum line;

(3) with tangent line L ₁Be the subregion starting point, with tangent line L ₃Being datum line under the subregion, is the zoning length of side with D, divides N at directions X successively _XIndividual zone; With tangent line L ₂Be the subregion starting point, with tangent line L ₃Being datum line under the subregion, is single regional length of side with D ,-1 zone of directions X division, the first row directions X subregion is accomplished, wherein N _XIndividual zone and N _X+ 1 region overlapping partial-length is L _X=D-M _X

(4) with tangent line L ₃Along Y direction translation D successively, 2D ... (N _Y-1) D length, and, repeat subregion step (3) successively successively as datum line under the new subregion, accomplish secondary series, the 3rd row ... N _YRow directions X subregion; With tangent line L ₄Be datum line on the new subregion, repeat subregion step (3), accomplish N _Y+ 1 row directions X subregion, wherein N _Y+ 1 row directions X subregion and N _YRow directions X subregion lap width is L _Y=D-M _Y

Claims (2)

1. one kind is used for the technological subregion of laser fast forming portable light source scanning system; Comprise the subregion moveable platform, piston the is housed workpiece chamber (9) of (10); It is characterized in that: the subregion moveable platform is fixed in the work housing (6); And be disposed at top, workpiece chamber (9), and the subregion moveable platform comprises linear electric motors platform (1) and scanning platform (5), linear electric motors platform (1) is suspended from the top of workpiece chamber (6) through connector; Scanning platform (5) is fixed on the linear electric motors platform (1); Scanning platform (5) comprises laser instrument (3), scanning galvanometer (4) and speculum (2), and speculum (2) is positioned at the top of laser instrument (3) and scanning galvanometer (4), and laser instrument (3) is positioned at the right of scanning galvanometer (4); A fanout that contains the scan control program links to each other with the control end of scanning platform (5) through the galvanometer control card, links to each other with the control end of linear electric motors platform (1) through motion control card simultaneously.

2. a kind of subregion portable light source scanning system that is used for the laser fast forming technology according to claim 1, it is characterized in that: described scan control program package contains a zoning ordinance, and zoning ordinance is:

(1) reads current cross section contour information, and draw current cross section contour full-size length H on horizontal X and vertical Y direction _X, H _Y, make H _X, H _YD does division arithmetic with the vibration mirror scanning regional diameter, and the result is designated as Z _X, Z _Y, set up bracket function N _X=[Z _X] and N _Y=[Z _Y], set up fractional part function M _X={ Z _X∈ [0 ,+∞) and M _Y={ Z _Y∈ [0 ,+∞);

(2) L ₁Be the tangent line of the cross section contour left end parallel, be directions X subregion original bench mark line with the Y axle; L ₂Being the tangent line of the cross section contour right-hand member parallel with the Y axle, is that the directions X subregion stops datum line; L ₃Be the tangent line of the cross section contour lower end parallel, be Y direction subregion original bench mark line with the X axle; L ₄Being the tangent line of the cross section contour parallel with X axle upper end, is that Y direction subregion stops datum line;

(3) with tangent line L ₁Be the subregion starting point, with tangent line L ₃Being datum line under the subregion, is the zoning length of side with D, divides N at directions X successively _XIndividual zone; With tangent line L ₂Be the subregion starting point, with tangent line L ₃Being datum line under the subregion, is single regional length of side with D ,-1 zone of directions X division, the first row directions X subregion is accomplished, wherein N _XIndividual zone and N _X+ 1 region overlapping partial-length is L _X=D-M _X

(4) with tangent line L ₃Along Y direction translation D successively, 2D ... (N _Y-1) D length, and, repeat subregion step (3) successively successively as datum line under the new subregion, accomplish secondary series, the 3rd row ... N _YRow directions X subregion; With tangent line L ₄Be datum line on the new subregion, repeat subregion step (3), accomplish N _Y+ 1 row directions X subregion, wherein N _Y+ 1 row directions X subregion and N _YRow directions X subregion lap width is L _Y=D-M _Y

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