Summary of the invention
For the above-mentioned technical problem that prior art exists, the invention provides a kind of impact reducing residual stress, take into account scan efficiency again simultaneously, improve the Laser Scanning for the manufacture of three-dimensional body of Workpiece shaping quality.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
For the manufacture of the Laser Scanning of three-dimensional body, comprise the following steps:
Current cross-section profile is divided into several regions to be scanned, and all borders of current cross-section profile are all divided, described region to be scanned is regular hexagon or local regular hexagon, and the gap in described adjacent region to be scanned is more than or equal to zero;
Carry out filling scanning to the inside in several regions to be scanned respectively, and the scan line that adjacent region to be scanned adopts is predetermined angle angle, described predetermined angle is greater than 0 degree, and is less than 180 degree;
For all adjacent gaps, region to be scanned, at least one scan line is adopted to scan successively.
Further preferably, current cross-section profile is divided into several regions to be scanned specifically to comprise:
Minimum enclosed rectangle is drawn according to current cross-section profile;
By the every of minimum enclosed rectangle while extend out predeterminable range to form subregion reference frame;
Described subregion reference frame is paved with successively from the multiple regular hexagon in subregion reference frame side;
The all regular hexagons or local regular hexagon that are included in current cross-section profile are denoted as region to be scanned.
Further preferably, described predeterminable range is greater than zero, and is less than the orthohexagonal length of side.
Further preferably, carry out filling scanning to the inside in several regions to be scanned respectively specifically to comprise:
The scan line being parallel to arbitrary regular hexagon limit in current region to be scanned is adopted to carry out parallel sweep to current region to be scanned;
After current sector scanning to be scanned, continue to adopt the scan line being parallel to arbitrary regular hexagon limit in next region to be scanned to carry out parallel sweep to next region to be scanned, and the scan line that adjacent region to be scanned adopts is predetermined angle angle, described predetermined angle is greater than 0 degree, and is less than 180 degree;
Repeat above-mentioned steps, until all sector scannings to be scanned are complete.
Further preferably, the scan line that described adjacent region to be scanned adopts is 120 degree of angles.
Further preferably, fill scanning process in the inside in described region to be scanned, the scanning direction of adjacent scanning lines is identical or contrary.
Further preferably, the gap in all adjacent regions to be scanned is equal.
Further preferably, described trace interval of filling in scanning equals the trace interval in gap scanning.
Further preferably, described method also comprises: when the gap in region to be scanned is zero, adopts a scan line to scan the gap in all regions to be scanned successively.
Further preferably, described method also comprises: when the gap in region to be scanned is greater than zero, adopts two or three scan line to scan the gap in all regions to be scanned successively.
The present invention is for the manufacture of the Laser Scanning of three-dimensional body, by comprising: current cross-section profile to be divided into several regions to be scanned, and all borders of current cross-section profile are all divided, described region to be scanned is regular hexagon or local regular hexagon, and the gap in described adjacent region to be scanned is more than or equal to zero; Carry out filling scanning to the inside in several regions to be scanned respectively, and the scan line that adjacent region to be scanned adopts is predetermined angle angle, described predetermined angle is greater than 0 degree, and is less than 180 degree; For all adjacent gaps, region to be scanned, adopt at least one scan line to scan successively, make relative to equilateral triangle subarea-scanning, regular hexagon Division area of the present invention is moderate, inner do not have scanning filling path short especially, and laser does not need switch frequently, and scan efficiency is higher; And relative to chessboard subarea-scanning, the scan line of regular hexagon subregion of the present invention is different in size, thus residual stress between adjacent scanning lines is more easily discharged.Therefore, the present invention not only reduces the impact of residual stress for the manufacture of the Laser Scanning of three-dimensional body, and has taken into account again scan efficiency, improves Workpiece shaping quality.
Detailed description of the invention
Understand better to allow those skilled in the art and realize technical scheme of the present invention, being described in further details below with reference to Figure of description and specific embodiment.
As shown in Figure 1, for the manufacture of the Laser Scanning of three-dimensional body, comprise the following steps:
Step 11: current cross-section profile is divided into several regions to be scanned, and all borders of current cross-section profile are all divided, described region to be scanned is regular hexagon or local regular hexagon, and the gap in described adjacent region to be scanned is more than or equal to zero;
This step 11 can realize especially by with under type, as shown in Figure 2:
Minimum enclosed rectangle is drawn according to current cross-section profile;
By the every of minimum enclosed rectangle while extend out predeterminable range to form subregion reference frame;
Described subregion reference frame is paved with successively from the multiple regular hexagon in subregion reference frame side; Be understandable that, the multiple regular hexagon of subregion reference frame can be paved with according to arbitrary order by the present invention, has only write a kind of detailed description of the invention herein, but not the present invention is not limited to this kind of mode, can also be alternate manner, such as, be paved with from center, then respectively to both sides paving powder;
The all regular hexagons or local regular hexagon that are included in current cross-section profile are denoted as region to be scanned, and each regular hexagon or each local regular hexagon are a region to be scanned.
Described hereinly be, minimum enclosed rectangle every while extend out distance can be equal, can certainly be unequal, concrete condition needs to determine according to design, preferably, described predeterminable range is greater than zero, and is less than the orthohexagonal length of side, so not only make Region dividing more reasonable, and be convenient to the robustness of follow-up intersection algorithm.
Described above is a kind of mode current cross-section profile being divided into several regions to be scanned, in concrete enforcement, alternate manner can also be adopted to realize, such as, several regular hexagons are adopted to be paved with whole current cross-section profile from centre to surrounding, finally all regular hexagons or local regular hexagon that are included in current cross-section profile are denoted as region to be scanned, can implementation enumerate all at this.
It should be noted that at this, described local regular hexagon refers to an orthohexagonal local, the border of current cross-section profile as shown in Figure 2, and the region to be scanned of display is local regular hexagon.
Step 12: carry out filling scanning to the inside in several regions to be scanned respectively, and the scan line that adjacent region to be scanned adopts is predetermined angle angle, described predetermined angle is greater than 0 degree, and is less than 180 degree;
This step 12 can realize especially by with under type, as shown in Figure 3:
The scan line being parallel to arbitrary regular hexagon limit in current region to be scanned is adopted to carry out parallel sweep to current region to be scanned, wherein the scanning direction of adjacent scanning lines is identical or contrary, namely according to from side to opposite side, again from opposite side to side, mode by that analogy scans, certainly, can also according to being all at every turn that mode from side to opposite side scans;
After current sector scanning to be scanned, continue to adopt the scan line being parallel to arbitrary regular hexagon limit in next region to be scanned to carry out parallel sweep to next region to be scanned, and the scan line that adjacent region to be scanned adopts is predetermined angle angle, described predetermined angle is greater than 0 degree, and is less than 180 degree;
Repeat above-mentioned steps, until all sector scannings to be scanned are complete.
Preferably, the scan line that described adjacent region to be scanned adopts is 120 degree of angles, certainly, can also be other angle, not enumerate at this.
It should be noted that at this, for the scanning sequency in several regions to be scanned, can according to from side, scan one by one along zigzag trajectory or other track while scan, preferably, adopt based on nearby principle and scan line is consistent when scan one by one, such as, as shown in Figure 3, a kind of scan line is first selected to carry out the scanning (top left side see current cross-section profile) in regular hexagon region, local, continue with the scan line in this direction scanning regular hexagon region, local (top right side see current cross-section profile) nearby, the first row scanning is over, refer again to the first row scan mode, to be 120 degree of angles with the first row scan line, scan line scans the second row, mode by that analogy completes last column scanning, after last column has scanned, the region to be scanned that centre is not scanned in addition is scanned, until all sector scannings to be scanned complete end, concrete scan mode can see Fig. 3, like this can in order to avoid frequently change scan-line direction, thus improve scan efficiency.
Step 13: for all adjacent gaps, region to be scanned, adopt at least one scan line to scan successively, wherein, the scan line in gap as shown in phantom in Figure 4.
In this step 13, described adjacent gap, region to be scanned can be more than or equal to zero, and preferably, described adjacent gap, region to be scanned is greater than zero, can reduce the residual stress between region to be scanned so further.
In concrete enforcement, when the gap in region to be scanned is zero, a scan line is adopted to scan the gap in all regions to be scanned successively; And when the gap in region to be scanned is greater than zero, adopt two or three scan line to scan the gap in all regions to be scanned successively, certainly, the concrete quantity of above-mentioned scan line can set according to the width in adjacent gap, region to be scanned.
In concrete enforcement, the gap in all adjacent regions to be scanned can be equal, can certainly be unequal, further preferably, residual stress due to current cross-section profile medium position is greater than the residual stress of boundary position, therefore, in order to disperse residual stress better, for the region to be scanned being positioned at current cross-section profile medium position, its adjacent gap, region to be scanned can arrange wider, and for being positioned at the region to be scanned of current cross-section profile boundary position, its adjacent gap, region to be scanned can be arranged more narrowly.
In concrete enforcement, described trace interval of filling in scanning equals the trace interval in gap scanning, certainly, so mainly for the ease of simple to operate, but the present invention is not limited to this kind of implementation, it can also be alternate manner, and such as, the trace interval arranged in filling scanning is not equal to the trace interval in gap scanning.
Be understandable that, above-mentioned steps 12 and step 13 can be exchanged in the order performed, and first can perform step 12, then perform step 13, or first perform step 13, then perform step 12.
It should be noted that at this, although only describe the scanning of current cross-section profile above, but because the cross section profile after each layering of workpiece all can scan with reference to above-mentioned scan method, therefore, those skilled in the art is with reference to after technique scheme of the present invention, just can realize the laser scanning of workpiece manufacture process well, reach technique effect of the present invention.
Above embodiment is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all should belong to protection scope of the present invention.It should be pointed out that some amendments without departing from the principles of the present invention and modification, should protection scope of the present invention be considered as.