CN109079132B - Positioning method for 3D grafting printing - Google Patents

Abstract

The invention provides a positioning method for 3D grafting printing, which comprises the following steps: mounting a bearing substrate on printing equipment, fixing a forming substrate on the bearing substrate, mounting a base body on the forming substrate, and further mounting a part to be printed continuously on the base body; fixing the position of a scanning device, extracting 3D model hierarchical data of a part to be printed through 3D printing software, and scanning to obtain outline model data of a first layer; and acquiring the correct contour position and the scanned data of the contour model of the first layer through the vision sensor, judging the deviation, further carrying out corresponding movement and scanning again until the deviation of the data is within the error range, preparing for printing, and starting to print. The 3D grafting and printing positioning method provided by the invention is simple to operate, and the yield and the processing efficiency are improved by positioning the position of the part to be grafted and printed in the printing equipment and the positions of the simple component and other components to be printed.

Description

The positioning method of 3D graft printing

technical field

The invention relates to the field of 3D printing, in particular to a positioning method for 3D graft printing.

Background technique

3D printing technology is a kind of rapid prototyping technology. With the rapid development of 3D printing technology, 3D grafting printing technology has also been widely used in product manufacturing. Grafting printing technology prints components with more complex structures based on the simple components of the original parts. By combining 3D printing and traditional manufacturing technology, it can effectively save the cost of parts processing and improve the processing efficiency, but this method is very important for the positioning of parts and components The requirements are high. If the positioning accuracy is not high, it is easy to cause insufficient matching of the printed components, so that the whole part cannot meet the process requirements, and then the part will be discarded.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide a positioning method for 3D graft printing, which can ensure the positioning accuracy of parts and components and the overall quality of the printed parts.

The present invention provides a positioning method for 3D graft printing, which comprises the following steps:

Install the carrier substrate on the printing equipment, fix the forming substrate on the carrier substrate, install the base on the forming substrate, and then install the parts to be printed on the substrate, the forming substrate is provided with several first mounting holes , the base body is disposed on the molding substrate through the first mounting hole, the upper surface of the molding substrate is closely attached to the lower surface of the base body, and the base body is provided with a plurality of second mounting holes;

Fix the position of the scanning device, extract the 3D model to be printed by 3D printing software, and scan the base body and the parts on the base body to obtain the contour model data of the first layer;

Acquire the correct contour position and the scanned data of the contour model of the first layer through the vision sensor and judge the deviation, and then move accordingly and scan the comparison data again. The correct contour position is the corresponding part on the base the position of the second mounting hole where the component is located;

Repeat the moving and scanning steps until the deviation of the data is within the error range, and start printing.

Further, the forming substrate is provided with bolt fixing holes around it, and is fixed to the carrying substrate through the bolt fixing holes.

Further, the specific position of the first mounting hole on the forming substrate is preset, and is used to determine the position in the printing device of the base body and the model that continues to be printed on the base body.

Further, the second mounting holes are provided with different hole distances for mounting parts of different specifications.

Further, the scanning device is red light scanning or laser scanning.

Further, the number of the first installation holes is at least two.

Further, the parts are made of metal.

The positioning method for 3D graft printing provided by the present invention is simple to operate. By locating the positions of the parts to be grafted and printed in the printing equipment and the positions of the simple components and other components to be printed, the accuracy of the positioning of the parts and the overall accuracy of the printed parts are ensured This improves the yield rate, thereby saving processing costs and improving processing efficiency.

Description of drawings

FIG. 1 is a schematic flowchart of a positioning method for 3D graft printing in an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a molding substrate in an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a molding substrate and a substrate according to an embodiment of the present invention.

FIG. 4 is a schematic flowchart of a positioning method for 3D graft printing of multiple components in an embodiment of the present invention.

Description of main component symbols

Forming substrate 10 Bolt fixing hole 11 first mounting hole 12 matrix 20 second mounting hole twenty one member twenty two

The following specific embodiments will further illustrate the present invention with reference to the above drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that when a component is referred to as being "mounted on" another component, it can be directly on the other component or there may also be an intervening component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a co-existing centered component.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1. FIG. 1 is a schematic flowchart of a 3D graft printing positioning method according to an embodiment of the present invention. The 3D graft printing positioning method is used to accurately locate the positions of the existing components of the parts and the components of the parts to be printed. Grafting and printing a complete part structure includes the following steps:

S11, install the carrier substrate on the printing device, fix the forming substrate on the carrier substrate, install the base on the forming substrate, and then install the parts to be printed on the substrate;

S12, fixing the position of the scanning device, extracting the 3D model to be printed by 3D printing software, and scanning to obtain the contour model data of the first layer;

S13, obtain the correct contour position and the scanned data of the contour model of the first layer through the vision sensor and judge the deviation, and then perform corresponding movement and scan and compare the data again;

S14, repeating the moving and scanning steps until the deviation of the data is within the error range, ready for printing, and printing can be started.

As shown in FIG. 2 , which is a schematic diagram of the structure of the molding substrate 10 , in this embodiment, the molding substrate 10 has a cubic structure, and four corners of the molding substrate 10 are respectively provided with through the molding The bolt fixing holes 11 of the base plate 10 are used to fix the forming base plate 10 on the carrier base plate through the bolt fixing holes 11 . The forming base plate 10 is provided with at least two first mounting holes 12 for installing the base. . The specific positions of the first mounting holes 12 on the molding substrate 10 are preset, and are used to determine the positions of the substrate mounted on the molding substrate 10 and the model to be further printed on the substrate in the printing device. .

As shown in FIG. 3 , FIG. 3 is a schematic view of the structure of the base body 20 mounted on the molding substrate 10 . The upper surface of the molding substrate 10 is closely attached to the lower surface of the base 20 , and the number of the first mounting holes 12 is selected according to the specific size of the base 20 to ensure that the base 20 and the molding substrate 10 are The whole is stable and flat after being closely fitted. If it is not flat, the powder spreading may be uneven or even impossible in the subsequent powder scraping process, resulting in reduced printing efficiency and effect.

The upper surface of the base body 20 is provided with a plurality of second mounting holes 21 , and the second mounting holes 21 have different hole distances, and the different hole distances are used for mounting parts of different specifications. The correct contour position in the step S13 is the position of the corresponding part member 22 on the base body 20, and the part member is determined by the position of the second mounting hole 21 corresponding to the position of the part member 22. 22 the specific position on the base body 20 .

In the step 12, the scanning device is a laser scanning device or a red light scanning device, and the scanning device is installed above the base 20. In this embodiment, the scanning device is a laser scanning device, and the laser scanning device The device has fast scanning speed and high precision, which can effectively shorten the scanning time and speed up the processing progress.

In this embodiment, the positioning method for 3D graft printing is mainly used for graft printing of metal parts, especially for metal parts with complex structures to be printed.

As shown in FIG. 4 , based on the above-mentioned positioning method for 3D graft printing, the present invention also includes a method for grafting and printing multiple components of a part, which specifically includes the following steps:

S41, the component components are installed on the base body, the base body is installed on the forming substrate, the forming substrate is fixed on the bearing substrate, and the bearing substrate is installed on the printing device;

S42 , fixing the position of the scanning device, extracting the 3D model of each component to be printed by the 3D printing software, and scanning to obtain the contour model data of the first layer of each component, and extracting the first layer of the part component that needs to be grafted and printed. The contour model data of one layer is compared with the correct contour position, and the deviation is controlled within the error range by moving;

S43, according to the position of the first positioning completed part, position the next part, and use the positioning position of the previous part as the basis for the remaining parts in turn to complete the positioning, and control all positioning deviations within the error within the range, start printing.

The method is similar to the method of grafting a single component of the above-mentioned parts. The difference is that the 3D model to be printed of each component needs to be extracted. Since there will be errors in the installation of the corresponding two components, and at the same time, the positioning is difficult and the accuracy cannot be guaranteed. Each part component is positioned separately on the basis of the previous part component. This method is easy to operate and saves printing time.

During use, the lower surface of the base body 20 is closely attached to the upper surface of the forming substrate 10 through two or more of the first mounting holes 12 in advance, so as to determine the position of the base body 20 in the printing device , select an appropriate hole distance, place the part to be grafted on the second mounting hole 21 corresponding to the base body 20, extract the layered data of the metal 3D model to be printed through the printing software grafting module, and obtain the corresponding model. For the primary contour data, the laser scanning device placed above the base 20 scans the parts to be grafted on the base 20 and obtains relevant data, and further scans the parts to be grafted on the base 20 through the visual sensor. The corresponding hole position is compared with the contour data of the first layer of the extracted 3D model. If there is a deviation, adjust the position by translation and rotation, and then scan through the laser scanning device again until the deviation range is controlled within the error range. Printing is possible.

When grafting multiple components of a part, it is only necessary to extract the 3D model corresponding to each component and the contour data corresponding to the model. After completing the positioning of the first component to be printed, repeat the above positioning steps on this basis. The positioning of each of the remaining components can be performed separately on the basis of the first positioned component.

The positioning method for 3D graft printing provided by the present invention is simple to operate. By locating the positions of the parts to be grafted and printed in the printing equipment and the positions of the simple components and other components to be printed, the accuracy of the positioning of the parts and the overall accuracy of the printed parts are ensured This improves the yield rate, thereby saving processing costs and improving processing efficiency.

Those skilled in the art should realize that the above embodiments are only used to illustrate the present invention, not to limit the present invention, as long as the above embodiments are appropriately made within the spirit and scope of the present invention Variations and variations fall within the scope of the claimed invention.

Claims (7)

1. A3D grafting printing positioning method is characterized in that: the method comprises the following steps:

the printing method comprises the following steps of mounting a bearing substrate on printing equipment, fixing a forming substrate on the bearing substrate, mounting a base body on the forming substrate, and further mounting a part to be printed continuously on the base body, wherein the forming substrate is provided with a plurality of first mounting holes, the base body is arranged on the forming substrate through the first mounting holes, the upper surface of the forming substrate is tightly attached to the lower surface of the base body, and the base body is provided with a plurality of second mounting holes;

fixing the position of a scanning device, extracting a 3D model to be printed through 3D printing software, and scanning the substrate and parts on the substrate to obtain profile model data of a first layer;

acquiring correct contour positions and data of the scanned contour model of the first layer through a vision sensor, judging deviation, further carrying out corresponding movement, and scanning and comparing the data again, wherein the correct contour positions are positions of the second mounting holes where corresponding part components are located on the base body;

and repeating the moving and scanning steps until the deviation of the data is within the error range, and starting printing.

2. The 3D graft printed positioning method of claim 1, wherein: and bolt fixing holes are formed in the periphery of the forming substrate and are fixed with the bearing substrate through the bolt fixing holes.

3. The 3D graft printed positioning method of claim 2, wherein: the specific position of the first mounting hole on the molding substrate is preset and is used for determining the position of the base body and the model which is continuously printed on the base body in the printing equipment.

4. The 3D graft printed positioning method of claim 1, wherein: the second mounting holes are provided with different hole pitches and used for mounting parts of different specifications.

5. The 3D graft printed positioning method of claim 1, wherein: the scanning device is used for red light scanning or laser scanning.

6. The 3D graft printed positioning method of claim 1, wherein: the number of the first mounting holes is at least two.

7. The 3D graft printed positioning method of claim 1, wherein: the parts are made of metal materials.

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