The line cut of interstitial antenna machines a method

5 μ M. Be being seamed continuously is very easy implementation is cut on cuboid, if tilt perpendicular before molybdenum silk an angle, can cut a R-joining, so the key of the problem is how to control the banking angle of molybdenum silk to spend with the program. The banking angle of molybdenum silk is spent is to pass taper head to adjust fluctuation guide pulley between slant be apart from form, for convenient control, the banking angle that considers interstitial antenna at the same time is bigger, use on, next cantilever add taper head, according to the actual condition of treatment, want control to go up only, the U axial of next taper heads went. Changed his costume or dress according to this train of thought an interstitial wave guide is special machine tool of taper of old point of view, former X-Y axis keeps changeless, will go up additionally, next taper heads use control of signal of axis of U of go the same way, the U signal that will leave head of the taper on cantilever only is received instead, when pace of signal of program drive U is entered, on, issue cantilever general at the same time with opposite way the pace is entered, achieved thereby on, the purpose with the fast translation such as next guide pulley, opposite way. Because this theory comes up,say, should assure workpiece height only the center on direction and on, the center of next guide pulley is consistent, what seam span and antenna with respect to what the work in assuring a program goes in X direction is actual seam span to agree (of short duration takes no account of compensation) , and adjust the space that to the U when some angle the axis takes be individual taper head 1/2 when, saved time (see a picture 2) . Because  is waited for cut interstitial antenna length to be 550mm, because this chooses DK7732 (X direction journey is more than 320mm) machine tool, the tenor leaves in the condition that allows conversion to hold clip enough already. Next, design cut fixture, clamping apparatus is fixed go up in machine tool bedplate, use outfit clip to wait for cut wave conduit (3) seeing a picture, wave conduit is located by face and end panel, pass wave guide of bolster plate impaction to be in charge of with close solid bolt, make sure wave conduit can be mobile (rely on) of clamping apparatus fixed position, before shift, hind twice cut should make sure cut is over wave conduit is full-length. Adjust on guide pulley (cantilever) height, make sure interstitial wave guide runs high center going up, the center of next guide pulley, for line cut treatment makes good preparation. 3 cut of  process designing because the uniqueness of this kind of machine tool, brought the issue that machines instruction work out. Considering line cut universal 3B code is in the limitation of taper respect, final decision is used very extensive ISO code uses in numerical control machine tool, and at present more popular, arrange the line of YH plot type that dominates an organic whole system of automatic process designing can use cut ISO code and 3B code. Design train of thought is as follows: Above all, fulfilling this algorithmic premise requirement is: Workpiece must be placed between fluctuation guide pulley and the position among. Working principle is the angle that tilts molybdenum silk to be seamed to what be about to machine first, walk along those who seam to cut the position for nothing again, (see a picture 4) , cut work, walk out of a groove, cut finally go out and move toward below one to seam. Because  is interstitial aerial sort is more, same of kind of antenna seam many, and every seamed span, seam wide, seam deep, dip angle is endless and identical, computational amount is quite large, manual computation is very wasteful, consider current line cut is automatic process designing system is not applicable hereat kind special machine tool, because this decision designs by oneself special hereat kind of interstitial antenna, the line cut that according to its parameter proper motion produces ISO to process code is automatic process designing software. Graph 5 it is systematic flow block diagram. This  system can be divided according to processing administrative levels for 3 module (6) seeing a picture, the most rock-bottom for file processing module, in order to handles rock-bottom file to input output to work; Intermediate layer is layer of intermediate data computation, computation of in order to gives the theoretical value that seams each; Most top layer is compensation computation layer, compensation of silk of molybdenum of computation of in order to, guide pulley is compensated, combine theoretical value to generate final data, generate final ISO code with layer of supply file processing. Summarize the working principle of layer of intermediate data computation now:  above all for consecution clarity, can seam every regard a graph piece as, every independence is analysed, do one's best is accomplished piece with piece the connection Yue Xiaoyue between is good, can offer for next operations on one hand so convenient, can utmost ground avoids to accumulate an error. Each graph piece enclosed 6 paragraphs of instructions, from cut sectional look (see a picture 7) can see have A, B, C, d4 paragraph, can see from inside the graph, a is a paragraph of sky goes, its start pursues to go up paragraph end position, terminus cuts the position for what this seaming namely; B paragraph have make Sunday run as what cut outside workpiece partially, another part is in inside workpiece is to seam namely deep; C paragraph it is namely seam wide; D paragraph it is B paragraph go against a process, cut a workpiece to prepare to undertake laying one plan paragraph processing. Additional, there must be a point of view before molybdenum silk cuts work, because this is in A paragraph with B a taper still must be inserted to dictate between Duan Zhi, control U axis takes U space, see a picture 4 (A) . × of U=tan(θ N) (0.

5h) sets θ N to be seam currently with the included angle between 90 ° plumb line, h is on, next guide pulley centre height. To assure the independent character of graph piece, in D paragraph one paragraph ought to go again in U axis after finishing - U, let taper return null, avoid to issue a graph piece to be affected. Pursue so far paragraph of end. When all graphs paragraph after finishing, academic data already all arose, but these data and effective treatment data still have a paragraph of space. Molybdenum silk diameter, guide pulley radius has bigger effect to processing data, because this must is opposite,these respects are compensated separately. Already more document has discussed molybdenum silk to compensate a problem in detail, discuss guide pulley to compensate a problem here: Show the cause that error of guide pulley radius forms above all, theoretical calculation is to think molybdenum silk and guide pulley point of tangency are changeless. However in fact, this applies to the machine tool of common thread cut that does not have taper function only. Because once had Zhang Jiao, the point of tangency of molybdenum silk and guide pulley will as angle greaten generation displacement. Pass the comparison of pair of graph 4(a) and graph 4(b) , can see this kind of case intuitionisticly. And the graph magnified 8 times this one phenomenon, can see from inside the graph L1 is academic calculative molybdenum silk and guide pulley tangent, l2 is actual tangent, as a result of position of point of tangency next moving, brought γ of a paragraph of error. Because this adds man-hour, x is worth lead γ distance theoretically to meeting comparing, should seam as lesser as plumb line included angle when, this error is dinky, but point of view is older, the error also is jumped over subsequently big, like interstitial wave guide precision of this kind of treatment asks taller and the workpiece with angle bigger change must undertake compensating computation technically, computational formula is as follows: Set β to be seam currently with the included angle between 90 ° plumb line, α =90 ° - β , r is guide pulley radius. Pursue what compensation joins the generation in process of intermediate data computation after a data is medium, parts of all treatment data computation complete already. In be being operated actually, should weave by definite pattern only file of an ASC Ⅱ , content is apart from for center of fluctuation guide pulley, guide pulley diameter, molybdenum silk diameter and parameter of interstitial wave guide are seamed deep, seam wide, seam bevel angle, seam span, undertake compiling to this file with this system next, processing, what final generation requires ISO code. The interstitial antenna that 4 notes give to assure to machine achieves  design requirement, the line still needs to notice the following item when cut treatment: (1) silk of molybdenum of first time cut must school is perpendicular. (2) ask to assure interstitial precision and exterior surface roughness, such thin wall, narrow to wave conduit the treatment that seams workpiece, must make sure electrode silk is oriented the orgnaization is good, molybdenum silk wants proper Zhang Jin. Because arrive from cut of old point of view till small angle seams cut continuously, molybdenum silk turns into from bevel edge orthogonal edge, molybdenum silk may become loose, thereby molybdenum silk amplitude greatens, and discharge suffers in machining a process control the function of force and bend be out of shape, contrail of cut of result molybdenum silk lags behind and deviate workpiece outline, serious when when molybdenum silk runs jump out easily guide pulley chamfer. (3) feed dogs must stabilize, and should dominate short circuit strictly, working fluid chroma wants a little bit big, gush sheds direction to want to encase fluctuation molybdenum silk is imported, discharge moderate. (4) because demand of exterior surface roughness is higher, should choose so in group wave pulse power source, electric parameter appropriate uses small peak value electric current and small pulse wide, according to experience pulse width S of optional <10 μ , pulse amplitude 60V, power is in charge of 3, machine electric current 0.

8A, cut speed is made an appointment with minutely 20 square of 15 ～ millimeter. (5) according to actual condition, still can make again to processing data optimize processing further. For instance: In be being machined actually, discover, way of angle of break of work look adjacent is opposite, the expenditure between time-sharing of the greater part when treatment is adjusting cut angle to go up (adjust guide pulley through taper head) . Machine efficiency to rise further, the method that can consider to adopt change cut method will adjust. Implement cut 2 times to workpiece, cut first all to seam, cut the others again converse seam. Practice proves this plan efficiency promoted nearly 50% the left and right sides. G92 X0 Y0 of 5 cut program (machine coordinate start with set of opposite coordinate means) G27 (means of set XY/UV planar linkage) G01 X5160 Y0 (molybdenum silk moves to be seamed continuously to the first case cut be in) G01 X0 Y-5300 (cut seam late demand) G01 X1820 Y0 (cut seam wide requirement, slightly) M00 (program stops) M02 (the program ends) 6 last words use above method, successful already cut gives a variety of interstitial antenna, achieve blueprint requirement completely via the test, in navigation radar overall in using, aerial performance is good, consistency is better. Current, this treatment method is being used extensively for the company. CNC Milling CNC Machining