The geometry of series-parallel connection machine tool that is based on Pro/E builds model and motion to emulate

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  • source:WEINBERG CNC Machining
On the foundation that structure of machine tool of article series-parallel connection analyses, be based on Pro/E parameter to change design software to undertake building a model to among them component, the tie condition with be passed certain and assemble a relation to undertake constructional to component model, finish the geometrical model of series-parallel connection machine tool from this, applied Animation function to realize the emulation of main shaft platform through this model. Pro/E(Pro/Engineer) is by PTC(Parametric Tech. The parameter that Nology Corporation) company rolls out changes a design package of three-dimensional CAD/CAM software, it is current the three-dimensional CAD software with most user is had on the world, be applied extensively at the industry such as mechanical, electron, spaceflight, spin, war industry. In recent years the development as the PC, the geometry that people applies all sorts of software to reach its to develop a tool to undertake three-dimensional substance to machine tool of shunt-wound, series-parallel connection is built model and emulate. Build with what AutocAD has 2 dimension model it is easy to be compared relatively, and build a model to three-dimensional substance more troublesome; OpenGL(Open Graphic 1ibrary) offerred a few radical plans yuan, can finish simple body scale only, and of complex body building a model is more complex job, if use assembly language (wait like VB++ , VC++ ) process designing undertakes entity is built model and emulate, ask staff member technology is high not only, and workload is very big also. The article applies Pro/E to undertake to series-parallel connection machine tool parameter changes a design, undertake an analysis to among them component, build a model respectively, finish pair of series-parallel connection machine tools finally with certain assembly concerns and restraining a condition build a model, applied Animation function to realize the emulation of athletic platform. The structure of series-parallel connection machine tool that 3 freedom spend machine tool of 1 series-parallel connection is simple, it is based on Stewart principle, the two freedom of the main shaft platform that basically spends by a 3 freedom and a tradition spend X-Y, workbench composition, be installed to be placed on workbench to move in order to acquire 2 dimension plane by treatment workpiece. Main shaft installation ends in platform, main shaft platform is passed circumferential all the 3 balls bore with a reamer of cloth (Ball Joint) or versatile bore with a reamer join with 3 connecting rod respectively, the other one aspect of the matter of every connecting rod passes columnar bore with a reamer (Rotational Ioint) joins respectively go up at corresponding slide carriage, every slide carriage can make perpendicular motion along slideway of respective place pillar, 3 pillar space all cloth. Pass structural analysis, discover series-parallel connection machine tool has the component of a lot of likeness and part not hard, 3 pillar that are like it, connecting rod and move, the ball bore with a reamer that decides platform and columnar bore with a reamer, suit to use the design mind that parameter changes particularly. Of model of geometry of machine tool of 2 series-parallel connection build (the structure that 1) spare parts builds a model to analyse series-parallel connection machine tool, basically mix by pillar, connecting rod move, calm platform composition, can undertake building a model to them, if pursue,1 shows be series-parallel connection machine tool to build modular process block diagram. Graph the block diagram of the hypostatic process that build a model of machine tool of 1 series-parallel connection pursues spare parts of Nextpage (2) of 2 join form assembles a spare parts to rig the process that fashions package, it is a process that appoints the tie between the spare parts through Pro/E actually, through appointing the tie that the spare parts asks, the assembly of certain part positional relation will finish assembly drawing, because this wants to consider to be linked together not only when assemble,the spare parts asks 8 kinds of join that assemble the kind (like the graph 2 show) , consider a spare parts to assemble even early or late order and combination concern. The assembly of visible part has different kind, if the graph is shown 3 times,series-parallel connection machine tool assembles process block diagram. Graph machine tool of 3 series-parallel connection assembles process block diagram (He Dingping stage uses the finishing pillar that 3) geometry builds a model fixed (Rigid) tie is assembled; The one axes that connecting rod joins slide block circles slide block rotates, pin is used between connecting rod and slide block accordingly (Pin) means join; Slide block is above pillar do linear translation exercise, ask to freedom of a translation is spent only, choose slide block (join of Solid) join means; Connecting rod and moving is to use the ball bore with a reamer that has 3 freedom to spend to undertake connective between platform, because this chooses a ball (Ball) join means has link, make machine tool of requires 3-DOF series-parallel connection finally, if pursue,4 are shown. Machine tool of series-parallel connection of graph 4 3-DOF pursues interface of emulation work of campaign of machine tool of 5 series-parallel connection pursues platform of main shaft of machine tool of 3 series-parallel connection is emulated in Pro/E software, two old methods can let package " move rise " : It is to use Mechanism function, it can let an user pass set kinematic pair -- " join " (Connection) , make machine component realizes imitate to move (virtual campaign) ; 2 it is to use Animation function, it can allow an user not set electric machinery and with the mouse direct daggle component, follow the making process of animation film, one pace is patted quickly (Snapshot) , tie in televise becomes animation. Take no account of the element of the respect such as the drive of servo electric machinery here, ask only between according to component place connective kinematic pair and motion, the 2nd kind of method is accordingly more convenient, and the requirement that can contented place needs to move. Use among them [Play] - [Capture] function, can output a video file, pass a player to be able to see the athletic case of platform of main shaft campaign. 4 last words build a model in specific spare parts when, should notice to distinguish referenced plane and plot plane, the person that this is plot reduces a lot of troubles. Use Pro/E software can realize the motion of platform of main shaft campaign to emulate conveniently, to design and be made of series-parallel connection machine tool later, athletic desired result and error analysis provided foundation and means. CNC Milling