Computer of CNC Machining of linkage of much axis of double and double-faced law emulates helix bevel gear research

0 development go treatment to emulate a system, the system can be dynamic indication treatment process, the helix bevel gear that can make treatment hind automatically is three-dimensional and hypostatic model, the particular structure that takes chance of tine of mill of numerical control of YH603 helix bevel gear and corresponding machine tool parameter and a pair of actual treatment gear parameter, the emulation system that uses development undertook treatment of double and double-faced law emulates helix bevel gear, the gear be identical that emulation result and effective treatment give is good, the implementation of the fictitious treatment that is helix bevel gear provided a kind of means. Keyword: The drive that bevel gear of helix of emulation CNC Machining of computer of double and double-faced law basically uses bevel gear of CATIA V5 helix at intersecting or wrong axis asks, have drive smooth, noise small, carrying capacity is advanced advantage, it is the crucial part in the mechanical product such as machine of car, tractor, project. Showing the treatment that studying helix bevel gear to emulate is 2 development that are based on AutoCAD mostly, compose built the three-dimensional and hypostatic model below AutoCAD environment, but because function of AutoCAD curved surface is not powerful, very difficult compose builds part of complex curved surface. Mainstream CAE software (be like: The interface program that the very few development such as ABAQUS, MSC, ANSYS) has data is exchanged in the light of AutoCAD, can change a file through data only (be like: Sat, Stl) undertake data is changed, easy generation data is missing reach the blemish such as broken face phenomenon, the tooth flank machining error that gives hypostatic model and finite yuan of analysis brought inconvenience. Also have the research that builds model of substance of helix bevel gear through the methodological compose of equation of curved surface of derivation tooth profile. But the method of a few treatment to helix bevel gear (be like: Metamorphic law) or parameter of tooth flank of the existence when treatment amends the after getting very hard correction tooth profile equation when adjusting analytic expression, at the same time tine root transfers curved surface part also differs because of cutting tool change of curved surface equation is very big, tooth flank and transfer the join of curved surface is very difficult also, reason very difficult compose establishs this method the three-dimensional and hypostatic model with helix mathematical bevel gear, the digitlization design that gives helix bevel gear and make leave adverse factor. These two kinds of research did not involve the specific production method of helix bevel gear, also did not see the helix bevel gear that is based on CATIA V5 machines emulated research now. The article studied the computer of the double and double-faced law of helix bevel gear emulates the implementation process of treatment, it is platform with CATIA V5, developed the double and double-faced law that is based on machine of tine of mill of numerical control of bevel gear of homebred YH603 helix 2 times to process emulation system, development method of the system has versatility, the treatment that can realize aleatoric helix bevel gear is emulated, each analysis that is helix bevel gear provided a convenient and quick platform that build a model. The double and double-faced law of 1 helix bevel gear is machined 1.

The treatment of bevel gear of angrily principle helix of bevel gear of tine of 1 circular arc is go up through the machine tool shake stage orgnaization imitate gear of a hypothesis, installation is shaking the face of bit body cutting on the stage is a teeth of a cogwheel of fictitious gear. When be compared to circle respective axis to rotate with constant transmission by treatment gear and fictitious gear, bit body can be in annulus one is cut on base alveolar, if pursue,1 is shown. When adjusting bed of gear cutting machine, must make the section cone of the gear that be cut and hypothesis flat-roofed the section cone of gear is tangent make pure roll, and Dao Dingxuan turns to plane needs and be cut the root awl of gear is tangent, if pursue,2 are shown. So axes of mill bit body and the section cone of the gear that be cut tilt the angle that a size is equal to Y of horn of root of tine of the gear that be cut. Produced problem of knife date amendatory so. The treatment that causes the gear wheel that be cut thereby is adjusted relatively complex, the norms of bit is more. Shrink gradually in treatment when bevel gear of tine of tine circular arc, use principle of this kind of angrily. 1.

2 double and double-faced laws machine double-faced law is the gear that shows one is machined, by inside cutting tool ages tooth stagger milling cutter is cut outside mixing dish, in alveolar two sides has the treatment process of cutting at the same time. Alveolar width is by the knife of bit body the top is apart from (install the distance that circle of two homocentric point of a knife asks tooth namely) place control, this is arc tine bevel gear and accurate hyperboloid gear deputy method of rounds of big medium a kind of angrily that uses the most generally. Use double and double-faced method, rounds big use double-faced law treatment with truckle, rounds of big usable Fan Chengfa also but need not Fan Chengfa is machined, truckle must use Fan Chengfa. Double and double-faced law suits modulus lesser (M ≤ 2.

5mm) , roller seating space is very narrow, it is very difficult that concave and convex to truckle teeth of a cogwheel two sides is machined with generation alone respectively, because this asks,big, truckle all uses double cutting tool of essence of life essence of life cuts two sides of sunken, protruding. This kind of method suits the big batch of small norms gear to produce. Treatment of machine of tine of mill of numerical control of 2 helix bevel gear is emulated 2.

Total number of bevel gear of helix of model of construction of chance of tine of mill of numerical control of 1 helix bevel gear accuses to change treatment machine tool to use rod of movement of 3 orthogonal translation (the circumgyrate of X, Y, Z) and two axes orthogonality moves axis (A, B) is replaced complex shake, realized helix bevel gear exhibit treatment. Its structure is shown 3 times like the graph. O-XYZ is department of machine tool coordinate, swing the translation of the translation of axis of X of edge of a whirl that circles Y axis, whirl that workpiece gear circles oneself axes A, bit body and Y axis and axis of Z of edge of workpiece head box, two whirligig and 3 B that translation represented CNC machine tool respectively, A, X, Y mixes above Z5 linkage axis. It condenses method of principle of treatment of helix bevel gear, control and movement in 3 minimal lines to move on axis and 3 rotor. Because machine tool of 5 coordinate numerical control can be in,cutting tool comes true in machining a space any pose of opposite workpiece, because this is over,the numerical control of bevel gear of complete can contented helix turns treatment. The machine tool adjusted parameter to basically decide a knife, the parameter such as bed, position of wheel and ratio of roll, according to these parameter OK and affirmatory bit body is when cutting annulus base, bit body and annulus between base the relative position of aleatoric hour. The machine tool adjusts parameter give out in many coordinate department, and when numerical control machine tool is machined, must unite undertake below department of a coordinate, that is to say, fasten next begging to give cutting tool in workpiece coordinate above all the coordinate position of opposite workpiece and attitude, alternate the coordinate that begs each axis to fall in department of coordinate of numerical control machine tool is worth again next. Such ability make sure the opposite motion of cutting tool and workpiece concerns. Charge a machine tool through number the successive change of each axis coordinate, exhibit movement with respect to what can realize bevel gear of CNC imitate helix. 2.

Parameter of 2 machine tools machines a principle according to clench the teeth of helix bevel gear, angrily is produced form annulus and by the gear that treatment gear can regard a pair of clench the teeth deputy. Calculable the geometrical parameter that gives helix bevel gear and angrily parameter, get the machine tool adjusts parameter thereby. Having a machine tool to adjust parameter to be able to build each coordinate is the relation between, and cutting tool and workpiece fasten medium position and attitude in these coordinate. Graph 4 gave out machine tool and plan of concern of cutting tool coordinate, graph 5 gave out machine tool and plan of workpiece coordinate concern. Build coordinate department above all. So={Oo; Xo, yo, zo} , Sq={Oq; Xq, yq, zq} is fastened for machine tool and workpiece coordinate and with lathe bed solid is connected. Sc={Oc; Xc, yc, zc} , Sp={Op; Xp, yp, zp} to can move with what shake stage and bevel gear solid are connected coordinate is fastened. St={Ot; Xt, yt, the coordinate that Zt} connects to originally with cutting tool is, sb={Ob; Xb, yb, before Zb} turns for knife of bend of cutting tool knife fasten with the coordinate that shakes stage solid is connected, sn={On; Xn, yn, zn} is connected to transfer to coordinate is fastened and originally with machine tool photograph. Decision bit body and all and initiative condition that workpiece concerns relative to the position and code name gave out in the graph: Oc is shake Taichun heart, ot is bit body center, I is total knife dip, j is knife corner, δ M is round of base to install part, e slants for treatment buy is apart from, op is gear axes crossing, q is horny Xiang Dao (produce) of body cycle horn namely, s is radial knife, xb is bed, x is axial position of wheel, φ circles the corner of its axes for gear. The computer that double and double-faced law machines the 3 helix bevel gear that are based on CATIA V5 platform emulates a system 3.

1 treatment emulates principle cutting tool to want to excise partial metal to get gear part from tine base, in cutting process with respect to need cutting tool is mixed area of jackknife of instantaneous of tine base existence, this part overlaps area is the metal that will be cut. From geometrical respect regard, body of geometry of the base that suppose a tooth-like part of anything is A, body of cutting tool geometry is B, change the athletic process disperse of tine base and cutting tool, can divide cutting process into N cutting period of time, in these period of time body of cutting tool geometry and body of semifinished product geometry are not moved relatively and put in certain jackknife area, can be being regarded in the cutting in this one period of time so is in tine base geometry body is the area that subtracts B of body of geometry of it and cutting tool overlaps on A, period of time of such one by one have the result that reduces, what stay on work semifinished product finally is the bag sth resembling a net of cutting tool surface, the gear appearance that attainable treatment gives. The dimensional develop of this process attacks the concern can express to be Ai+1=Ai-(Ai ∩ B) I=(0, 1, 2, ... , n) gear is in process of Fan Cheng treatment, blade of cutting tool cutting cuts on tine base " trace " , namely cutting tool trace. Cutting tool trace forms the emulation of the process, aim the process that emersion ages successive of trace of the cutting tool on base is formed, figure ground describes the relationship of curve of cutting tool tooth profile and gear flute profile. For this, coordinate department solid is repeatedly on tine base, follow tine base to turn together according to the rotational speed of tine base. Here coordinate is medium, tine base " fall asleep " , cutting tool makes spatial motion by definite pattern, circle roll of tine base axes on one hand, the embroil that makes cutting tool moves, in the meantime, do even shake at the machine tool relatively the roll of the stage, the motion of cutting tool is the synthesis of these two kinds of motion. The cutting treatment of the machine tool is a successive process, and emulating can be to give out only cutting tool and workpiece are finite a relative position. So we must change athletic relation disperse, get finite the data of a relative position correspondence. Alleged disperse is changed even if athletic relation a medium variable serves as independent variable, give out its are machining a process medium a few dot extraction a cost, concern according to motion again the corresponding other variable on these dots extraction a cost is worth cipher out. 3.

The method that treatment of bevel gear of helix of 2 　 CATIA V5 implementation emulates 3.

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CATIA V5 of 1 　 CATIA V5 brief introduction is the system of high-end CAD/CAM software that IBM/DS is based on Windows core to develop. CATIA system has developed nowadays for compositive the CAD/CAE/CAM system that change, it has unified user interface, data management and compatible database and applied process interface, have the module of 20 many independence. CATIA V5 designs a function to waited for design domain to receive wide application in mechanical, plane, car, shipbuilding with its powerful curved surface. The body of function of curved surface modelling of CATIA offerred extremely rich modelling tool to support the modelling demand of the user in it now. Taller than if spy some function of Bezier curve curved surface, the frequency can be achieved 15 times, can contented special industry is smooth to curved surface slashing requirement of the gender. At the same time CATIA V5 still has the interface program with CAE software (be like: MSC.

The) such as SimDesigner, can convenient each linear undertakes in guiding the model the person waits for software to Nastran, Ad-ams, ANSYS and ABAQUS or nonlinear analysis and emulated research, wait for the research of spare parts of complex curved surface to helix bevel gear, the form that can implement a model conveniently builds the changeover that reachs data. 3.

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2CATIA V5 realizes helix bevel gear to machine emulated method to age to numerical control mill the machine tool is machined, adjust whole process of process and treatment to come true by motion of numerical control axis, the motion that emulates this machine tool so emulates a machine tool namely actually the motion of axis of 5 numerical control. The treatment process of helix bevel gear is emulated in CATIA V5, can be taken in emulation system above all and identical coordinate is the machine tool; Use model of dish of milling cutter geometry to circle two translation that shake the roll of stage axes represents way of machine tool X, Y directly then; The roll that circles model of tine base geometry with model of bit body geometry finally moves on behalf of A axis. Whole emulation system realizes a process to be: Create substance of gear semifinished product and entity of Pan Xi knife according to workpiece gear parameter and parameter of Pan Xi knife above all; Adjust He Panxi of position of substance of gear semifinished product accordingly according to parameter of linkage of axis of a group of numerical control then knife position, at the same time two substance are done reduce Boer operation, continue to read take linkage data to be over till treatment alveolar; Gear semifinished product circles oneself axes graduation to machine the next alveolar, be over till treatment all and alveolar. Because emulate a process,be to will machine process disperse to change, if use manual operation to realize workload big, not active also voice demonstrates to machine a process. The function is developed 2 times in what can go to the lavatory through its in CATIA V5, development goes corresponding treatment to emulate a system to realize treatment process to be controlled by the program. 3.

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The compositive treatment of system of 3 fictitious treatment emulates a system to basically be mixed by cutting tool database two parts comprise machine tool library, cutting tool database recorded the appearance of cutting tool and dimension, machine tool database recorded those who machine opportunity bed to adjust parameter. If pursue 6, after tine base model enters production system, through the type of corresponding cutting tool and dimension choosing in cutting tool database, adjust the machine tool parameter such as the treatment journey that ages base reachs cutting tool in the positional parameter on the machine tool, can give birth to the model of gear spare parts that into corresponding parameter fictitious treatment gives. 3.

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Function of above of implementation of flow of 4 systems order can pursue through be like the order flow of 7 comes true, after the program that start, treatment order is executed after the parameter that inputs gear spare parts inside interface of corresponding fictitious treatment system, cutting tool parameter, machine tool parameter, the program begins to judge CATIA V5 to whether be started, if CATIA V5 has been started,enter spare parts module directly, if CAT-IA V5 was not started, start module of spare parts of the reentrance after CATIA V5. Tine base model is built after entering spare parts module, establish cutting tool model again, adjust cutting tool position at the same time, let body of cutting tool geometry and body of tine base geometry make Boer operation next, the place that cutting tool place takes is excised on tine base, judge whether to cut alveolar, if was not cut,repeat again above measure, adjust cutting tool to arrive next angrily position. Finish alveolar hind rework the next is alveolar, finish whole make emulate the process that build a model. 3.

The measure that CATIA V5 develops 3 　 2 times has had a lot of detailed introduction CATIA V5 2 times to develop the literary works of the principle at present. The article introduces only with VB6.

The measure that 0 pairs of CATIA V5 develop 2 times: (Library of 1) initialization COM, make file of the mankind library, VB6.

0 can introduce from inside IDE. Type library file is binary file, but file of head of library of type of the generation after warp knitting interpret (patulous name realizes a file for TLH) and type library (patulous name TLI) . File of type library head is file of format of the language below corresponding environment, include object definition, overall situation is unique identifier, the structure that uses in the object, method and attribute are defined, intelligent finger (SmartPoint-er) definition, across cites the specification of type library. If across cites type library, should press cite to introduce orderly, will appear otherwise compile a mistake, file of type library implementation is the implementation code of object and its interface. (2) is opened or build Application of object of an overall situation, this started CATIA. (3) joins Document object to the middle of Application, in order to realize data management, the DrawingDocu-ment that the Productdocument that figure of the Partdocument that if part drawing is designed,uses, product uses, 3 view use. (4) statement is about to use a target, install referenced plane and viewpoint, scale geometry body. (5) updates Document object or Viewer object, so that show geometrical form and structure correctly. (6) shuts Document, release COM library resource. 4 application example 4.

Development of 1 emulation system takes machine of tine of mill of numerical control of bevel gear of YH603 series helix to develop a target to emulate a system, as a result of mill of numerical control of bevel gear of YH1603 series helix tine machine is four-axle linkage machine tool, emulation program can realize machine tool of 5 axes linkage, can realize the imitate of four-axle linkage machine tool of emulation system through C axis is being secured to rotate when treatment is emulated. 4.

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1 interface development ages according to mill of numerical control of bevel gear of YH603 series helix type of machine treatment parameter, if interface of development emulation program pursues 8. The interface divides composition by 3: (1) parameter contrasts area. Parameter of treatment of helix bevel gear is very much, represent the form of exemples of each parameter to in an attempt to to convenient parameter is inputted, prevent parameter to input a mistake; (2) parameter inputs an area; (3) program operates an area. 4.

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Development of 2 emulation systems develops flow chart by emulation program, the measure that develops 2 times according to CATIA V5, the VB with corresponding development the process building a model of programme controll CATIA V5. Treatment process is passed " clock accuses " control every time the time-interval of Boer operation, can come true to see the cutting process of tine base in the process that build a model, and the speed that controls treatment. Length of be confined to, the development process to emulating a program no longer give uncecessary details. 4.

Application of 2 emulation systems chooses bevel gear of a pair of helix, if express,its machine parameter 1. parameter the input emulates a program, moving Cheng can be pleasant to the eye to machine a process in CATIA V5 window after foreword. Graph a 9 instantaneous that are emulation treatment process pursue. After treatment is finished, final model picture can be gotten after adding other feature to the model, if pursue 10. Graph 11 be as same as treatment emulation software data is used on machine of YH603 mill tine, the photograph of objective of helix bevel gear that machines the clench the teeth of a pair of photographs that go out actually. Look from the graph, machining emulation graph and the tooth form teeth directional that objective pursues is consistent. Via examining actually, emulation result and actual result also are accorded with. It is OK to explain CNC Machining emulates a system from this accurately imitate gives machine of CNc mill tine to machine a process actually, emulation result is accurate, reliable. 5 epilogue are platform with CATIA V5, with conjugate principle of tine biscuit sth resembling a net is theoretical foundation, use simulation the treatment process of true gear comes the method that compose builds model of helix bevel gear, the 2 development technology that uses CATIA V5 finishs the automation that machines a process, the treatment that can implement the complex part such as gear is emulated, and compose builds a hypostatic model that agrees with true treatment spare parts, for tooth flank of helix bevel gear the contact is analysed (TCA) and finite yuan of stress analysis (FEA) provided mathematical three-dimensional geometry model. CNC Milling