Be based on NX (UnigraphicsNX) research of CNC Machining of much axis of blade spare parts

Process designing of numerical control of much axis treatment is the crucial technique that the lamina in aviation engine processes all the time. To improve the treatment efficiency of blade spare parts, blade spare parts was solved to machine cutting tool contrail to generate in the CAM module of UG software reach CNC Machining code to create a problem. Machine quality and efficiency and the port with reduce manufacturing cost to having very principal to raising blade part so. Foreword CNC Machining is a kind of programmable flexible machine a method. Numerical control machine tool forward high speed, high spirit, Gao Rou sex, compound sexual way develops, because its cost is relative taller, reason applies to precision the treatment of the part with tall, complex form, and band of public errand of blade spare parts is small, its model the face is complex dimensional curved surface more, need makes appropriative tool fixture, into batch production asks to duplicate accurately, it is the applied object of CNC Machining all the time. Blade is the crucial part in the mechanical equipment such as turbine, hydraulic turbine commonly, there is very wide application in spaceflight, aviation, car and energy field, blade is by Xie Guan, Xie Shenhe Xie Gen is formed 3 times partly on the whole. But numerical control process designing is measure of key of whole lamina treatment, also be the bottleneck in process of treatment of blade spare parts, the workload that machines software of blade appropriative CNC Machining to be able to reduce process designing staff raises blade kind the production precision of the spare parts. The CAM module of UnigraphicsNX has very high computation rate, powerful interpolation function, whole journey to cut examination and processing capability, automatic knife handle and clamping apparatus automatically to interfere rate of examination, feed to optimize editor of contrail of processing function, cutting tool to optimize the function such as analysis of remains of function, treatment too. The CAD of 1 lamina builds a model 1.

The model that 1 compose builds sectional line lamina is according to model value drop goes to what the process of Xie Shenqu face undertakes again to molded lines. Every molded lines by inside 4 parts comprise curve of arc curve, curve back arc, circular arc of edge giving steam and curve of circular arc of the edge that take steam, if pursue 1 (A) be shown. 4 parts curve goes up to part to molded lines first when modelling modelling joins a molded lines, reuse modelling technology founds to pass the foliaceous body curved surface of a group of molded lines along certain way. 1.

2 compose build curved surface offerring the hypostatic circumstance that can consult to fall, the LISP program that can use AUTOCAD according to the requirement on product figure reads in data of circular arc molded lines the validity that generates DWG file to examine data roughly in CAD, the changeover function of reoccupy UG and AUTOCAD reads in data UG in. In UG lieutenant general every sectional molded lines divides 4 paragraphs: Inside curve of arc curve, curve back arc, circular arc of edge giving steam and side of curve of circular arc of the edge that take steam. Use NURBS curved surface to approach a method to have curved surface model. Curvature is used to analyse a function to ask to amend molded lines by craft when there is indentation on discovery face until model till the surface is slick, if pursue 1 (B) be shown. Graph the craft of the CNC Machining of lamina of numerical control process designing of the treatment craft of the lamina of model attempt Nextpage2 of 1 lamina and UGCAM is commonly inside, back dambered surface secures milling. Line of fixed position of axial of the arc inside alignment of the fixed position when mill intrados next impaction, line of fixed position of axial of arc of back of alignment of the fixed position when mill carries dambered surface on the back next impaction. The treatment coordinate cipher out of the arc inside the setting face is entered, the thick mill of attrib border work out of edge giving steam is entered, the cutting tool contrail of edge giving steam. Idle stroke should decrease to shorten as far as possible when program of the arc inside the work out face and back arc face handling time. This module that Open API function of use UG ／ realizes basically realizes cutting tool to machine orbit computation and file of CNC Machining code to create two kinds of functions. Working procedure is machined to will machine cent to be semifinishing machining of blade rough machining, lamina, finish machining according to blade in blade CAM module 3 parts. The user is OK the case with particular basis, the choice generates the CNC Machining code of need. To above the cutting tool of the method that they implement for 3 kinds of treatment and generation machines orbit is different need basis blade treatment technology is certain. Specific implementation process is as follows: (1) get treatment parameter. Machining parameter is a group of parameter of condition of geometry of surface of the lamina after by the user the input uses motion of control cutting tool and treatment. (2) get treatment to use cutting tool parameter. The parameter of treatment cutting tool in obtaining cutting tool dialog box saves his treatment in Cutter-Param of style of structure of cutting tool parameter. (3) build blade to process semifinished product. Finish machining semifinished product is founded is blade molded lines value the dot has slanting buy, gain point of molded lines of blade semifinished product value, again the method that according to blade three-dimensional parameter changes a design builds system of geometry of blade semifinished product. (4) found treatment to use cutting tool. Through UG ／ Open API function founds machine use cutting tool, after cutting tool is founded, will store the setting of cutting tool parameter in Cutter-Param structure style arrives in this cutting tool, of the cutting tool that finish found. (5) build treatment to operate father node group. The node of UGCAM has 4 kinds: Namely body of program, geometry, cutting tool and treatment method. Node can be had by father node place already, also can have child node. Form structure of tree form branch thereby. It is OK to connect those who cross node to use found treatment to operate conveniently. (6) use UGCAM platform to undertake contrail of cutting tool of numerical control milling is designed. Its core content basically includes vector of cutting tool axis the job that aftertreatment of machine tool of processing of knife of means of drive of control, contrail, advance and retreat, numerical control and treatment of numerical control machine tool emulate the respect such as imitate. The flexibility of the complexity of the product when be being machined as a result of much axis linkage and cutting tool axle control and diversity, the difficulty that machines process designing is very great. So the treatment of blade can use the side edge of milling cutter to undertake machining to dimensional curved surface, avoid the R cutting of ball head knife, can improve the efficiency of curved surface thick finish machining substantially. Emulation treatment can make cutting tool way, can create program of thick finish machining at the same time, observe through imitate of cutting tool method whether cutting tool way is right. Use hypostatic cutting test and verify to undertake observing whether cutting tool way is right at the same time. If the graph is shown 2 times,cutting tool method emulates orbit. Graph 2 lamina treatment emulates orbit (7) aftertreatment. UGNX system cent gives priority to processing program and postposition processing program two much, advocate processing program is aimed at treatment object, treatment system builds 3D model, contrail of computational cutting tool, make NCI file (file of cutting tool method) . NCI file is a document that compiles the full data that includes NC program with ASCII code. Postposition processing system configured the general aftertreatment that gets used to onefold type to control a system, this postposition processing provided model of database of a kind of function, the user is mixed according to numerical control machine tool the particular case of numerical control system, can undertake revise and be compilinged to its database, custom-built a program of special postposition processing that gets used to machine tool of some numerical control. NC code is generated can pass UG2 second open function UF_SETUP_generate_program (... ) implementation. This function alls over all previous to appoint all treatment operations in group of program father node, generate CNC Machining code. The need before using this function builds a * .

Ptp file is used save CNC Machining code, when using * .

The file of treatment machine tool of the name of Ptp file and choice inputs this function. This function defined cutting to process form of form of parameter, NC, auxiliary instruction, interface function. The machine tool that save program document finally and transmits blade treatment to use through the network completes the treatment of blade. With Xi Menzi (SIEMENSE-840D system) machining center of vertical of 5 axes linkage is the aftertreatment program of the exemple (slightly) . Work out of software of process designing of numerical control of 3 last words is complex the machine program of curved surface, accelerated the development of machine tool of linkage of numerical control much axis. Applied UG software is right the CNC Machining of much axis linkage of blade, simplified the work out of numerical control program, complete the treatment of foliaceous body face, reduced the workload of follow-up polish working procedure greatly, rose to machine quality and manufacturing efficiency greatly, raised the utilization rate of equipment at the same time. And obtained good economic benefits. CNC Milling