RU133773U1 - SYSTEM OF AUTOMATIC MANUFACTURE OF COMPLEX PROTOTYPES OF PARTS BY THE METHOD OF LAYERED CURING OF POLYMERS - Google Patents

Abstract

A system for the automatic production of complex prototypes of parts by the method of layer-by-layer curing of polymers, characterized in that it consists of means for constructing 3D models CAD-1 ... CAD-N, converters Pr1.1 ... Pr1.N from various formats of these 3D models into * .stl , blocks for the analysis and editing of 3D models (3DAP), construction of technological supports (PP), converter Pr2 to the internal binary format of specialized software for constructing layered sections (PS block), as well as section contours (PKS block), viewpoint of contours (PEC block) and hatching of layered sections (ShPS block), Pr3, Pr4 converters to preterminal * .gbr or * .png file formats, BDTF1, BDTF2 databases for forming terminal files, SLS devices for implementing Selective Laser Sintering technology and SLA devices for implementing Laser Stereolithography technology; in addition, each of the CAD systems is connected to the input of the 3DAP block through converters Pr1.1 ... Pr1.N; the output of the 3DAP block is connected to the input of the software unit, the output of which is connected to the input of the converter Pr2; Further, there is a branching in the structural diagram: along the upper branch of the structural diagram, Pr2 output is connected to the input of the PKS block, and at the bottom, to the input of the PS block; moreover, the connections between the blocks for the upper and lower branches of the structural diagram are established in the following sequence: - from the PKS block to the PEC block, from the PEC block to the ShPS block, from the ShPS block to the Pr3 converter, from the Pr3 converter to the BDTF1 database, from the BDTF1 database to the SLS device - along the upper branch for the implementation of selective laser sintering technology; - from the PS unit to the Pr4 converter, from the Pr4 converter to the base

Description

The utility model relates to mechanical engineering, instrument making, rocket and space, defense and other industries and is intended for the automatic production of prototypes of parts with complex geometric shapes from liquid photopolymers (SLA - Laser Stereolithography technology), as well as metal powders (SLS - Selective technology Laser Sintering).

From the prior art, the following analogues are known.

US 4,575,330 A1, 03/11/1986, describes a stereo laser lithography apparatus consisting of an air-cooled helium-cadmium ultraviolet laser, a beam focusing optical system, a laser beam scanning (pointing) system, a stainless steel bath with a lifting technology platform, which controls a computer.

Disadvantages: the installation uses pixel-by-pixel illumination of each layer of the photopolymer, for which complex and expensive laser-optical systems and control systems are used.

US 5133987 A1, 07/28/1992, describes a setup consisting of a water-cooled argon ultraviolet laser, an optical beam focusing system, a laser beam scanning (pointing) system, a stainless steel bath with a lifting technological platform, and a control computer.

Disadvantages: complex and expensive laser-optical systems, control system, cooling system.

In EP 1250997 A1, October 23, 2002 (prototype), a device for manufacturing bulk products is described, characterized in that it consists of a bath for photosensitive materials, on the walls and bottom of which an elastic coating is applied, from which it is easy to separate the hardened material, and exposure and curing of the material is carried out from below through the transparent bottom of the bath, using the exposure and projection units.

Disadvantages: two installations are used for curing the photopolymer (exposure and projection), and in the proposed utility model, one; photopolymer bath has a complex and expensive design.

As reasons that impede the achievement of a technical result, which is provided by a useful model, the following can be noted: the installation method of the exhibiting and projection installations contributes to the rapid contamination of the lens surface, the design and location of the bath contribute to the accumulation on its glass bottom - the surface onto which the projection is carried - of hardened particles photopolymer - all this reduces the accuracy of prototyping.

The task to which the claimed utility model is directed is to expand the list of software and hardware tools for the rapid and accurate manufacture of prototype parts.

The technical result of the utility model is: the ability to automatically produce prototypes of parts of complex structured objects, including those with a closed spatial configuration, without the use of assembly operations and additional mechanical processing, while ensuring high accuracy (no worse than 50 microns) and low laboriousness of manufacturing ; the ability to prepare input data for devices implementing the curing technology of liquid photopolymers (Laser Stereolithography, SLA) and the technology of selective laser sintering of metal powders (Selective Laser Sintering, SLS); when using the utility model in combination with CAD / CAM / CAE-systems, it is possible to produce prototypes of products in a short time without the use of design and technological documentation on paper, thus implementing end-to-end design technology, which significantly reduces time and improves the quality of design technological preparation of production.

The technical result is achieved due to the fact that the utility model (Fig. 1) consists of construction tools for 3D-models CAD-1 ... CAD-N, converters Pr1.1 ... Pr1.N from various formats of these 3D models into the * .st1 format , blocks for analysis and editing of 3D models (3DAP), construction of technological supports (PP), Pr2 converter into the internal binary format of specialized software for constructing layered sections (PS block), as well as section contours (PKS block), construction of equidistant contours ( block PEC) and hatching of layered sections (b ok ShPS), Pr3, Pr4 converters to preterminal * .gbr or * .png file formats, BDTF1, BDTF2 databases for forming terminal files, devices for implementing Selective Laser Sintering technology (SLS device) and Laser Stereolithography technology (SLA device )

Each of the CAD systems is connected at the output to the input of the 3DAP block through Pr1.1 ... Pr1.N converters. The output of the 3DAP block is connected to the input of the PP block, the output of which is connected to the input of the Pr2 converter. Next, there is a branching in the structural diagram: along the upper branch (see Fig. 1), the output Pr2 is connected to the input of the PKS block, and along the lower branch, to the input of the PS block. Further, the connections between the blocks are established in the following sequence: from the PKS block to the PEC block, from the PEC block to the ShPS block, from the ShPS block to the Pr3 converter, from the Pr3 converter to the BDTF1 database, from the BDTF1 database to the SLS device for the upper branch ; from the PS unit to the Pr4 converter, from the Pr4 converter to the BDTF2 database, from the BDTF2 database to the SLA device - for the lower branch.

Figure 1 shows the structural diagram of a utility model.

Figure 2 shows an example of the configuration and location of technological supports.

Figure 3 shows examples of layered sections for an SLS device.

Figure 4 shows examples of layered sections for an SLA device.

Figure 5 shows (a) an SD model and (b) its prototype made using a utility model.

The utility model consists of 3D-model building tools CAD-1 ... CAD-N, converters Pr1.1 ... Pr1.N from various formats of data from SD-models to * .st1 format, analysis and editing blocks of SD-models {3DAP), construction technological support (PP), Pr2 converter into the internal binary format of specialized software for constructing layered sections (PS block), as well as section contours (PKS block), constructing equidistant contours (PEC block) and hatching layer sections (ShPS block), converters Pr3, Pr4 in preterminal formats * .gbr or * .png files, BDTF1, BDTF2 databases for forming terminal files, SLS devices for implementing Selective Laser Sintering technology and SLA devices for implementing Laser Stereolithography technology.

Each of the CAD systems is connected at the output to the input of the 3DAP block through Pr1.1 ... Pr1.K converters. The output of the 3DAP block is connected to the input of the PP block, the output of which is connected to the input of the Pr2 converter. Next, there is a branching in the structural diagram: along the upper branch (see Fig. 1)) Pr2 output is connected to the input of the PKS block; on the bottom - to the input of the PS unit. Further, the connections between the blocks are established in the following sequence: from the PKS block to the PEC block, from the PEC block to the ShPS block, from the ShPS block to the Pr3 converter, from the Pr3 converter to the BDTF1 database, from the BDTF1 database to the SLS device - for the top branches from the PS unit to the Pr4 converter, from the Pr4 converter to the BDTF2 database, from the BDTF2 database to the SLA device - for the lower branch.

The utility model works as follows. A 3D model made in one of the CAD systems is converted to the * .st1 format using Pr1.1 ... Pr1.N and fed to the input of the 3DAP block, where the 3D model geometry is analyzed and corrected, its position selected for manufacturing etc. The edited 3D model is fed to the input of the PP unit, in which the construction of technological supports (Fig. 2) is performed, which are necessary to ensure the production of “hanging” surfaces. The supported SD model is converted to the internal binary format of specialized * .b software using Pr2. Next, the operations of forming layered sections are performed: for the SLS device, the construction of the contours of the sections (PKS block), the construction of equidistant contours (block PEC) and the hatching of layered sections (block SHPS) are performed - figure 3; for the SLA device, layer-by-layer sections with an integrated structure are formed in the form of a combination of sections of technological supports and the main circuits of the product (figure 4). The formed layered sections are converted to preterminal file formats — in * .gbr using Pr3, in * .png using Pr4 — and are accumulated in the BDTF1, BDTF2 databases, from where they are subsequently read by the control software of the SLS device or SLA device when building prototypes products. Figure 5 shows a prototype of a complex structured object made using a utility model.

Information confirming the possibility of realizing the features of the utility model indicated in the formula is given in the following publications: Artamonov E.I., Artamonov A.E., Balabanov A.V., Romakin V.A., Savelyev K.A. Development of software and hardware systems for the physical modeling of engineering structures / Proceedings of the 12th International Conference "Systems for Design, Technological Preparation of Production and Management of the Industrial Product Life Cycle" (CAD / CAM / PDM-2012, Moscow). M .: Analyst LLC, 2012. S.18-21.

Claims (1)

A system for the automatic production of complex prototypes of parts by the method of layer-by-layer curing of polymers, characterized in that it consists of means for constructing 3D models CAD-1 ... CAD-N, converters Pr1.1 ... Pr1.N from various formats of these 3D models into * .stl , blocks for the analysis and editing of 3D models (3DAP), construction of technological supports (PP), converter Pr2 to the internal binary format of specialized software for constructing layered sections (PS block), as well as section contours (PKS block), viewpoint of contours (PEC block) and hatching of layered sections (ShPS block), Pr3, Pr4 converters to preterminal * .gbr or * .png file formats, BDTF1, BDTF2 databases for forming terminal files, SLS devices for implementing Selective Laser Sintering technology and SLA devices for implementing Laser Stereolithography technology; in addition, each of the CAD systems is connected to the input of the 3DAP block through converters Pr1.1 ... Pr1.N; the output of the 3DAP block is connected to the input of the software unit, the output of which is connected to the input of the converter Pr2; Further, there is a branching in the structural diagram: along the upper branch of the structural diagram, Pr2 output is connected to the input of the PKS block, and at the bottom, to the input of the PS block; moreover, the relationship between the blocks for the upper and lower branches of the structural diagram is established in the following sequence: - from the PKS block to the PEC block, from the PEC block to the ShPS block, from the ShPS block to the Pr3 converter, from the Pr3 converter to the BDTF1 database, from the BDTF1 database to the SLS device — along the upper branch for implementing selective laser sintering technology; - from the PS unit to the Pr4 converter, from the Pr4 converter to the BDTF2 database, from the BDTF2 database to the SLA device - along the lower branch to prepare input data and implement the technology of curing liquid photopolymers.

Images