Being living the integration respect , with the development accords with the STEP ( StandardfortheExchangeofProductModelData ) criterion parameterization feature moldmaking and  systematically gives priority to , having carried on the highly effective work of greats quantity at the moment is the home and abroad development heatpoint 

Being living the intelligentization respect , the work has start only a short while ago , and  still awaits that we leave hard 

2、 NCs' cutting tool locus generates the method study developing actuality 

Digital control programming core work is generateing the cutting tool locus , afterwards by such scattered one-tenth sword spot , places that the handle comes into being the digital control processing program afterwards viaing . 

The next cutting tool locus comes into being the means and actes as some and introduce 

2.1 baseding on a little and string , surface and part of the body NC's sword track formation means 

CAD's technique moves through the two dimension mapping , and udergo the three dimensions wires frame and camber and the solid modelling generation , now the parameterization feature reacing is always moldded . 

Is living two dimension mapping together with three dimensions wires frame phase , in case the opening processes , the rough sketch is processed the digital control process is main with spot and string act as drive target , the plane area process and so on . 

This kind of level that personnel staff was requireed manipulating in the process is taller , complex mutually . 

Being living camber and the solid modelling generation , entity process had ariseed to based on . 

The entity process target is an entity (  oridinarily blendes for CSG and BREP express ) , its ( moreover , intersects , falls short of to operate ) but get yield through some fundamental parts of the body habitually after the set operation . 

The entity is processed not merely usable rough machining and semi precision work to the spare parts , and the great area cuts Yu Liang , and the effectiveness is processed in the raise , but also usable research together with development to digital control baseding on the feature programming system , is the feature process base 

Entity process  oridinarily possess entity rough sketch process and the entity area and processes two kinds . 

The entity process realization means slices law ( SLICE ) in the interest of the straturm ,  in immediate future slices by the process entity in the way of one series of level , afterwards to obtains the intersection comes into being the isometry string dos worthwhile the sword the going away locus . 

The original slave system needs the angle depart , the digital control process that the ACIS's geometry moldmaking being living achieved this kind to based on a little on the terrace and the string and surface and entity 

Feature NC's sword track formation means 2.2 baseding on 

The parameterization feature molds to possess the specified development particular period , yet baseds on that feature cutting tool locus formation means research   starts only a short while ago . 

The feature processes to cause digital control programming personnel staff to be out to let drop the step geometry message to those ( in case : Spot , string , surface and entity ) manipulate , but transforing to carry on the digital control programming in the interest of  directly to accords with the feature that engineers and technicians are used to , and liftd the programming effectiveness enormously 

W.R.Mail and A.J.Mcleod are living in their research to give out one to based on feature NC's code generating sub system , and this systematic work rule is : Spare parts every one process wholly may be regarded as to adjust to make up the total that the spare parts form shape feature group processed .