The research that tune of boring machine of mill of table of numerical control dig bores hole
- source:KAIHER CNC Machining
The stage of boring D1 Kong Shi 2.
The stage of boring D2 Kong Shi 3.
The nominal axes that is bored hole 4.
Even if pillar moves the line pursues boring machine pillar sends mill of 3 dig table to bore hole this coaxial spends the affirmatory of Dx3 of D3 compensation cost the error is the error that decide a value, can be over in boring circumgyrate of D1 aperture workbench 180 ° and after sideslip Lx=2lx, be worth Dx3 and its direction according to affirmatory already compensation, again this Dx3 value can eliminate sideslip workbench this coaxial spends an error. By the graph 3 if be bored hole,can see Dx3=2dx3(2) nominal axes has lain fitly the YW coordinate of workbench axes is planar (vertical vertical plane) in, criterion tune bores hole after tune but need not again sideslip 2lx distance, can eliminate D3 already so this coaxial spends an error, the head of exchange of Dx2 of fixed position error that still can remove sideslip 2lx bores hole coaxial spends an influence. From this, can reach already placed solid to fall at the premise of logical place on workbench in contented workpiece, workbench of boring machine of dig table mill is in the position of optimal clip firm on lathe bed of its horizontal stroke, it is a workbench centre of turning circle dot park is bored hole even if nominal axes and pillar move the nodical place of the line. Because be machined,when axes of name be boringed hole the reason of spare parts structure just cannot cross workbench centre of turning circle when, workbench is in the logical place on horizontal lathe bed, should be sideslip goes to a workbench make the centre of turning circle of boring cutter point of a knife nods O1, just be located in over the nominal axes that workpiece is bored hole. The pillar when 3 boring axis sends is fore-and-aft the affirmatory of fore-and-aft and optimal position should encounter reasonable and affirmatory pillar of the position specific situation, boring machine of dig table mill must secure pillar in a on fore-and-aft lathe bed proper place, and the axis that use boring is taking cutting tool to extend when sending into the form as what bore hole, boring axis axes and axes of name be boringed hole are in the Db of error of angle of cut inside Xz plane, in the Dg of error of angle of cut inside Yz plane, like table mill boring machine, the coaxial that bores hole to tune spends the effect with have main, and send into the addition of length as boring axis, boring axis is self-prossessed flinch below the boring lever that cause be out of shape, the coaxial that also bores hole to tune spends generation bigger impact. What differ with place of table mill boring machine is, the boring axis of boring machine of dig table mill is extended when boring hole, but the pillar of fore-and-aft shift must originally the position that buy determines in on vertical lathe bed one, and important is this decides the position is OK and should be chosen. Press design regulation, z of boring axis edge to mobile distance should parallel Yu Lizhu the mobile distance of edge W axis; The nominal axes that when boring hole, is bored hole should be put in as parallel as W(z) axis position. The workbench before boring hole already moved to make axes of name be boringed hole aims boring axis along X coordinate, secure clamp, boring axis is retractile already to null, in installing the arbor that places boring cutter to insert aperture of boring axis inner cone (graph 4) . There is Db of error of angle of cut inside Xz plane when axes of name be boringed hole and boring axis axes when existence, because O of two lines node is in as pillar lathe bed even if on slideway even if move also even if move,along pillar at the same time the line moves, make pursue 4 in the numeric and corresponding change of L ′ , and Db of two lines angle of cut keeps changeless, reason no matter pillar moves to be secured to which position, the tune that brings about by Db bores hole the computation that coaxial spends error D4 is formulary, can express to be D4=2dx4=4(lW+l ′ ) the Dx4 in Tgdb(3) type -- the D1 after the tune that horny error Db causes bores hole is worth error LW to the line to the X of D2 aperture axes -- the end panel before be being bored hole arrives of workbench centre of turning circle be apart from L ′ -- the boring since Kong Duan is nodded. L ′ is worth but can losing, when O dot is located in M to burn inside, l ′ value is negative, the side outside be located in (graphic representation position) when, l ′ is apparent, d4 can be before boring D2 aperture, move through X Xiang Wei workbench, get compensating. Its compensate a value to be Dx4=dx4=2(lW+l ′ ) Tgdb(4) pursues 4 boring axis sends into bore hole type (3) makes clear, below the circumstance that exists in Db, eliminate D4 fill wanting a condition is LW+l ′ =0. From the graph 4 in can see, already was in by boring long aperture in workpiece logical place (line of stage heart sideslip deuces aperture is full-length) below premise, be about to satisfy =0 of equality LW+l ′ to hold water, can be boring axis axes and the nodical O of axes be boringed hole only, just be located in on line of sideslip of workbench centre of turning circle. As a result of O of afore-mentioned two lines node as even if pillar moves and even if edge pillar is mobile, so =0 of ′ of conditional type LW+l always can hold water. This that is to say, when boring axis sends boring machine of dig table mill to bore hole, to make D4 the smallest, pillar places the optimal position of solid on vertical lathe bed, should be to make the nodical O of boring axis axes and aperture name axes, on the line of sideslip of centre of turning circle that just is located in workbench. Of horny error Db and nodical O determine by afore-mentioned knowing, get pillar the optimal position that place firm and accurate compensatory premise, it is foregone Db and nodical O the position on boring axis axes, this can use actual measurement to beg, measure a law to be as follows. workbench park transverse intermediate position, on mesa transverse put one smooth foot, slant in smooth feet the some side upside of workbench centre of turning circle puts one gauge block (graph 5) . Pillar stops in a classics to try measure proper place, on axis of boring of park of dial gauge solid, watch head is touched on K of face of gauge block inside, take A1 of dial gauge reading, boring axis and workbench turn each 180 ° (set all do not have graduation error) , make express a head to still be touched on former flank K to take reading B1, serve as datum line with boring axis axes (O1 ～ O1) , even if move,decide pillar from this on-line a bit Q1. Q1 is LQ1=(A1-B1)/2 to the distance of boring axis axes. Must notice to even if move,express pillar the sign of the LQ1 that dot of the Q1 on the line is located in which a side of boring axis axes. Even if move pillar LW2 distance, boring axis is corresponding also extension forward or regressive LW2, repeat the measurement in front to get LQ2=(A2-B2)/2, decide Q2 is nodded thereby. Join Q1 and Q2, get even if move,expression pillar the linear Q1Q2 of the line, constructive the 5b that be like a graph, even if move,can measure axes of the axis that get boring and pillar directly thereby the Db of angle of cut of the line and its node O arrive the distance value of face of front of main shaft box. If measure,get A1=B1, criterion LQ1=0, even if move,make clear this pillar on-line dot is located in on main shaft axes; If be measured again,get A2=B2, make clear afore-mentioned two lines coincide; If calculate,get LQ1=lQ2, criterion afore-mentioned two lines are parallel, be like LQ1 ≠ LQ2, criterion two lines intersect, db of angle of cut also can use value of the LW2 in type of next Tgdb=(lQ2-lQ1)/lW2(5) of type cipher out, can connect indicated value of overwriting W coordinate to get. Graph 5 measure nodical O and Db nodical O in the adjustment of the position on boring axis axes passes actual measurement place to even if move,get boring axis axes and pillar line (be bored hole namely nominal axes) the position of nodical O, send into to boring axis bore hole for, the likelihood cannot realize the condition of LW+l ′ =0 at all. For example, if nodical O is handed in in the axes part at the back of the bearing before boring axis, criterion pillar although reach arrives before fore-and-aft ultimate position, make nodical O just is located in on line of sideslip of workbench centre of turning circle impossibly also this one logical place. From this knowable, the logical place that should make pillar fore-and-aft can come true and do not come to nothing, the workpiece a side that still must ensure nodical O wants to hand in the bearing before boring axis specificly, and the specific seat that seeks a nodical O that assures LW+l ′ =0. After deciding when arbor, the distance of the bearing before centre of turning circle of point of a knife comes is knowable, the particular value of the logical place of nodical O is gotten not hard. The position that because the size of Db and nodical O are specific,goes up in boring axis axes, it is by main shaft box installation is on pillar and when solid installs pillar to go up at slide carriage, their relative position precision decides, reason gets nodical O to should be after the proper place on boring axis axes, need to assemble the position or adjust pillar on perpendicular slideway in pillar through adjusting main shaft box the position relative to its slide carriage (make pillar circles Y axis small on slide carriage turn a horn is worth) , achieve contented and nodical O to have the demand of proper place. Of position of the cutting tool on boring machine of mill of 4 dig table reasonable and affirmatory when pillar is used to send into tune to bore hole on boring machine of dig table mill, pack the boring tool on the arbor that is placed in boring axis, its edge Z to logical place, the distance of the end panel before wanting to satisfy centre of turning circle of point of a knife to main shaft box on one hand is more than the half with full-length aperture a bit (again young general cannot connect long aperture boring, stiffness of axis of too big boring drops) ; Satisfy the centre of turning circle of a cutting tool point of a knife even on the other hand, even if axes of park boring axis and pillar move on the nodical O of the line. CNC Milling