Rehabilitate of error of displacement of job of T4240 coordinate boring machine

005mm. The shift of workbench by deputy implementation of guide screw, nut, mobile quantity is numerated by dial and vernier. There is corrective foot below workbench, the curve of its surface is according to the pitch error of guide screw enlarge hind is made. When workbench is mobile, the guide screw that is pressed in curvilinear surface drives vernier to make swing relatively, dial is opposite turn more when the line or turn less an angle, can make workbench acquires amount of an add displacement, as it happens is quits the accumulation of guide screw error. Because guide screw reachs corrective feet to have attrition loss, displacement precision can drop gradually, the curvilinear figure that needs to change corrective rule at this moment moves with extensive restoration precision. One, measure displacement error to use feet of narrow strain line and reading microscope to measure displacement error (following graphs) , measurement technique is: The direction that moves smooth feet by workbench first searchs to be being secured, workbench is retreated to ultimate position, turn guide screw along the clockwise next a week, namely workbench returns 5mm, the place begins the position for what measure surely. Adjust fixed position piece (course of fixed position face is abrade, ra is exterior surface roughness 1.

6 μ M) . The slip gauge that is 30mm with height is measured so that numerical value is Al, guide screw turns along suitable hour hand two weeks, workbench shift L0mm, measure so that read numerical value to be A2 with 40mm slip gauge, every shift L0mm measures workbench after, get A3, A4, A5... the poor value between them is workbench of every shift L0mm accumulate error △ S. The measure that slip gauge uses to avoid when measuring is too large, after be being measured 5 times commonly, before side of smooth feet of edge of fixed position piece is faced, will move, the slip gauge that is 30mm with height continues to measure after new fixed position, but the photograph of S5 of error earth △ that answer and measures before fixed position accumulates metrical error, namely: △ S5= (A5- A1) earthy △ S5 measures the job to should undertake twice, the average that takes a result twice (as above pursues) . 2, the school direct ratio of boring machine of coordinate of corrective feet T4240 is long file 1:200, accumulate error △ S and calibrating curve to rise and fall namely the ratio of the H that measure △ is: △ S: ? Zuo =1:200. From go up the graph is knowable, when guide screw suitable hour hand rotates, when workbench makes effective journey by the direction of arrowhead, the curve of corrective feet is raised a cursor right, guide screw turned more an additional capacity, the shift of workbench is apart from lengthen, below the curve sunken shift shortens, because this should be measured so that should make when ＋ △ S,the curve falls sunken, namely △ H is negative worth; Have the protruding on the curve conversely, △ H is be worth. Have: × of earthy △ H=200 (earthy △ S) . In repair, corrective feet can produce long file - △ H, but cannot make the protruding on the curve produces ＋ △ H, need relevant data processing so, h3 of H2 of △ H1, △ , △ ... △ Hi subtracts respectively + △ Hmax, foregone + △ Max place is 0, each are worth the others to all be negative worth, measure to repair file namely (following watches) . 3, the note when corrective feet repairs file 1. When workbench is in position of rest, in corrective feet and lever contact place besmear shows an agent, with axis of hand roll lever, make lever slight bump corrective footage second, debus is corrective feet, in bump trace place to make good number, it is those who repair file to begin the position namely. 2. When repairing file, the start repairing file of board feet and corrective feet is right neat, place a start on table vice, the quantity repairing file that presses every L0mm with round file undertakes repairing file, respectively file gives each indentation, make △ H= earth 0.

20mm. 3. The nadir that presses each indentation uses the Xiu Qi that make the same score file, sand paper polish, maintain a curve join is pliable. 4. General need repeats measure the 1~2 that repair file second the precision that can be apart from in order to restore shift. Displacement error with random the difference of the biggest algebra of two △ S is calculated. The operation that repair file is not complex, the allow that repair file needs land 0.

20mm. The success or failure that repairs file depends on the measurement of △ S precision, the precision that because this wants when measure,notices measure, change that measures error and room temperature. Want when to notice above only, the metropolis when be being maintained gets satisfactory repair result. CNC Milling CNC Machining