UG software applies mediumly in converse project

In the process that connect a line, it is to link diagnostic line drop first commonly, analyse noodle is connected after. In the due and sound program before connecting a line, how to separate a side certainly according to the appearance of this car and feature, so that what decide,the dot should join, accomplish know fairly well to method of face of the following compose, ordinary control is in even the error of the line 0.

4mm is the following. 2.

Commonly used those who arrive is linear, circular arc and batten line (Spline) , among them the most commonly used is batten line. Choose commonly " Through Point " means, rank second had better be 3 rank, because rank second taller, plasticity is poorer, it is difficult to be out of shape namely, and follow-up processing speed is slow, data exchanges difficulty. 3.

Because measure from time to tome the surface outside error and model is not slick wait for a reason, the batten line that becomes repeatedly not only when arranging, still need to undertake adjustment, construct otherwise the curved surface that go out is not slick also. A kind of commonly used method when adjusting is Edit Spline, option of general and commonly used Edit Pole, include shift, add reference point and control the utmost to move along a certain direction, go to the lavatory to have an edition to batten, in addition, of the curve disconnect (Pide) , the bridge is received (Bridge) He Guangshun curve (Smooth Spline) often also use. Anyhow, before making a range need does the much work that move a line, curvature can be used to comb when moving a line undertake an analysis to its, in order to assure curvilinear quality, if pursue,2 are shown. Graph the curve of 2 construction 4, the outside face that tectonic curved surface asks to fluent appearance, light is arranged because of automobile body, because this is in tectonic curved surface when, want to be divided into a certain number of curved surface to undertake, should assure face knead dough especially between can tangent and successive or curvature is successive, such ability form a curved surface that does not have lapping defect. Additional, when tectonic curved surface, choose appropriate tectonic method according to particular case even. 1.

The method of tectonic curved surface (the tectonic method with the most commonly used 1) is Though Curve Mesh, what can assure curvature of curved surface border not only is successional, still can control curvature of four circumjacent bounds (tangent) , and Though Curves can assure both sides curvature only. (2) is used more still have Nxn order, OK and dynamic show the curved surface that founding, still can add at any time, decrease definition curve to string together, and curved surface also will be changed subsequently. Same, still can keep as successive as the G0 of photograph adjacent face, G1 and G2. (3) is when tectonic curved surface, classics regular meeting encounters 3 edges curved surface and 5 edges curved surface. Do a curve commonly, translate into of 3 edges curved surface quadrilateral curved surface, or will attrib border line is outspread, change 5 edges curved surface into quadrilateral curved surface, in order to reframes curved surface. Among them, on curved surface, make batten line (Curve On Surface) with clip (Trim) it is commonly used two orders that reach, if pursue,3 are shown. Graph the trigonometry range that 3 compose establish (4) constructs outside face, want to undertake the mirror is handled. In the center of curved surface department regular meeting appears raised, appear curved surface not only suitable, the central part that is a curved surface commonly is cut, receive through the bridge next those who make is flowing. (When 5) tectonic curved surface, often have between two faces " crease " , curved surface very not only suitable, because two faces are tangent,basically be discontinuous cause. Solve this problem, can install attrib border and tangent successive option through Though Curve Mesh, still can choose Match Edge after tectonic curved surface (NX3) option, can make the attrib border photograph of two curved surface matchs, make curvature successive thereby. Additional, although two curved surface are not conterminous, match Edge command is OK also the border a curved surface is automatic and outspread pay equal attention to close the border to another curved surface. (6) is when tectonic odd Zhang Ju's relatively flat curved surface, use face of the compose that nod the cloud directly (From Point Cloud) will more convenient, more accurate. Sometimes the interstitial need bridge between the face is received (Bridge) , in order to make sure curved surface transfers glossily. Beg when curved surface when handing in, undertake round horn processing also can make two curved surface pliable transfer. 2.

A few problems that tectonic curved surface should note (1) compose area is the most crucial is to hold kind feature, still need concise, curved surface area as far as possible big, and Zhang Shu is not too much. Additional, face of even reasonable cent builds modular efficiency with rising. (2) establishs curved surface procedure in compose in, need to be added again sometimes even a few line, so that construct curved surface, need even line and compose range to often undertake alternately. After curved surface building, want to check the error of curved surface, general measurement point arrives the error of the face, the error does not exceed 1mm. (3) is tectonic curved surface rank is less important as far as possible small, recommend commonly for 3 rank. Because, high-ranking second the possibility that makes the success between its and other CAD system exchanges data reduces a put oneself in another's position, other CAD system does not support possibly also high-ranking second curved surface. Rank second tall, criterion piece body is compared " firm hard " , the utmost of curved surface deviate is further, very no-go when the utmost edits curved surface. Additional, rank second low still be helpful for increasing a few circles horn, rake and add thick wait for a feature, be helpful for next process designing treatment, raise sequel to make the career of course of CNC Machining knife. 5, after tectonic and hypostatic compose establishs outside range, need compose builds hypostatic number model. If the model is simpler and when curvature change is not big, oversew them into a whole, reuse adds thick instruction to be able to build entity, but come true impossibly however below most circumstance, more such to the model in the article. If oversew outside face into a whole, a system that makes car bottom filling range close again, become an entity thereby, but because the car is bottom the curvature change of curved surface is bigger, often cannot come true to obtain housing order. Accordingly, need to slant first above all of the surface outside buy individually piece body, again compose is built piece inside, the cross section of outside face, mix made cross section finally inside, outside face suture rises, make make a system that close, thereby automatic translate into is hypostatic, this process includes commonly the following 4 respects. 1.

Of curved surface slant to the value chooses many at the same time with Offset instruction or be chosen completely in order to improve efficiency. The surface outside the car individually piece body slants the circumstance of the value, if pursue,4 are shown. Graph of 4 curved surface slant the value pursues 4 medium arrowhead express to slant the direction of the value, if arrowhead is retrorse, should input negative worth only can. Not be any curved surface can come true slant value, cannot come true slant the value has the following kinds of reasons commonly: (1) because curvature of curved surface itself is too big, basic curved surface has the case of normal mutation; (2) slants cost space is too large and cause slant intersect oneself after the value, bring about slant the value fails (in the article the car piece decency one-sided is worth 2 millimeter) ; (The character that 3) is slanted to be worth curved surface is bad, local have ripple, after can revising good curved surface only, undertake slanting is worth again; (4) still has a few curved surface to look very good, but cannot slant namely value, after encountering this kind of circumstance to be able to be changed into B curved surface with Extract Geometry, undertake slanting is worth again. 4 kinds of situations encounter above possibly when tectonic curved surface, want to learn to analyse its reason. 2.

The suture of curved surface slants the curved surface after the value still needs to cut out or fill face, with all sorts of curved surface editor method compose is built inside the surface, next the surface inside suture and outside face. When suture, via regular meeting suture fails, have commonly following a few kinds likelihood. (When 1) oversews, of suture slant body is too much. Should oversew only every time a few a few a body, need for many times to oversew. (2) suture public errand is less than two to be oversewed the distance between edge of adjacent of curved surface photograph. Encounter this kind of problem, it is commonly after increasing suture noncombatant duty, undertake oversewing again. (3) cannot be handed in after two surfaces are outspread collect, brim appearance does not match. If piece body is not B curved surface, need first will piece curved surface of B of body translate into, the made edge with another corresponding body matchs, undertake oversewing again. (There are the tiny deformation that is aware of hard or other geometry drawback on 4) brim. But local enlarge, undertake the surface analyses examination geometry limitation, if be put in geometrical blemish really, be revised or rebuild a body hind is new suture. 3.

What the effectiveness of suture needs to notice finally is, although executed suture order, the computer also did not give a wrong hint, look be like suture to succeed, actually may not. Some piece body is finished in suture hind, the meeting when enlarge sees have show a drop or shine show a line, still have space even. Accordingly, after suture is finished, must check the validity of suture instantly. If be in sutural on appeared to show a drop or shine show a line, mean this place to succeed without suture, must abolish suture operation, undertake oversewing afresh, the hypostatic job building a model that will give sequel otherwise brings difficulty, but if only outside periphery is bright show, explain suture is successful, if pursue,5 are shown. Graph the suture of surface of 5 inside and outside and cross section 4.

Create entity inside, a body that outside face and cross section suture close into, a system will be automatic translate into is hypostatic, if pursue,6 are shown. Graph 6 substance 6, brief summary anyhow, using UG software to do converse design is more time-consuming, and the processing that nodding the cloud and compose build a body aspect, not as converse as major software (wait like Surfacer, Rapidform) convenient. But, UG becomes a few thoughts of converse design and means, for instance how compose line and compose face, how to undertake according to product feature program and break up a product to wait, converse to using major software does converse design to also can be helped somewhat, actually, this also is the key that has become converse design. CNC Milling CNC Machining