Lathe accessory reachs his to use a method

With workpiece of installation of 4 ungual chuck the appearance of 4 ungual chuck is like graph 1a place to show. 4 its claw move independently through 4 screw. Its characteristic is to be able to install clip appearance to compare complex blame swing tower to wait like quadrate, rectangle, and clamping force is large. Because its install clip hind cannot automatic centering, outfit clip efficiency is so inferior, when holding clip, must search with tosecan or dial gauge, make workpiece centre of turning circle and center of lathe main shaft right neat, if pursue,1b searchs to use dial gauge outside round sketch map. Graph outfit of 1 4 ungual chuck places workpiece 2.

Spend a requirement to coaxial with top installation workpiece taller and the axis that needs tune treatment kind workpiece, commonly used double tip holds clip work, if the graph is shown 2 times, the tip before its is average tip, install inside main shaft aperture, follow main shaft to turn together, outfit of the top tip that it is work is after inside sleeve of rear push frame. Workpiece uses central aperture to be supported to be between around tip, follow main shaft to turn together through dial and card bind round. Graph 2 with top installation workpiece uses a tip to install workpiece to should notice: The bearing bolt on 1) card bind round cannot bearing is gotten too close, in case workpiece is out of shape. Because 2) relies on to block band to deliver torque, so the cutting dosage of turning workpiece wants small. When 3) drills hole of two upright centers, want to use car of car hilt end panel to make the same score first, reoccupy center is gotten drill central hole. When installing dial and workpiece, want rub-up dial above all inside of whorl and main shaft end outside whorl, twist dial on main shaft, hold axial one end on card bind round again. It is finally among double tip installation workpiece. 3.

Intention axis installs workpiece when less than Kong Wei locates fiducial, axes of the circle outside can assuring and inside the coaxial of aperture axes spends a requirement, use arbor to locate right now, workpiece decides a commonly used and columnar arbor and small taper arbor with columnar aperture; To containing the workpiece of aperture of taper hole, whorl, spline aperture to locate, commonly used and corresponding cone arbor, whorl arbor and spline arbor. Graph 3 locate on columnar arbor columnar arbor is beyond impaction of columnar face centering, end panel will hold clip work, if pursue,3 are shown. Arbor and workpiece aperture use the clearance fit of H7/h6, H7/g6 commonly, so workpiece can very cover conveniently go up in arbor. But because cooperate clearance bigger, can make sure coaxial is spent only commonly 0.

02 ㎜ are controlled. To eliminate gap, raise precision of arbor fixed position, arbor is OK make it cone, the taper of Dan Zhui body is very small, otherwise workpiece can arise on arbor askew (4a seeing a picture) . Commonly used taper is C=1/1000~1/5000. When fixed position, workpiece wedge is close on arbor, the Kong Hui after wedge is close produces flexibility to be out of shape (graph 4b) , make workpiece is not sent thereby tilt. Graph the advantage of the arbor of osculatory circumstance small taper of workpiece of installation of 4 conic arbor is to rely on wedge to tighten the friction of generation to drive workpiece, do not need other clamp device, centering precision is tall, can amount to 0.

005~0.

01 ㎜. The axial that defect is workpiece cannot locate. When workpiece when the diameter is not quite big, can use taper arbor (taper 1: 1000 ～ 1: 2000) . Workpiece covers impaction, rely on attrition force and arbor solid to tighten. Taper arbor is right in precision of accurate, treatment is tall, assemble and unassemble convenient, but cannot have borne large moment of force. When workpiece when the diameter is bigger, should use those who contain impaction nut is cylindrical arbor. Its clamping force is larger, but the precision in be opposite relatively of taper arbor low. 4.

The center is worn and follow a diameter when workpiece length with the use of tool carrier than be more than 25 times (L/d>25) when, because the tigidity of workpiece itself becomes poor, when turning, workpiece suffers cutting force, self-prossessed with the action that mental efforts leaves when rotating, meeting generation bends, oscillatory, affect its cylinder badly to spend with exterior surface roughness, in the meantime, in cutting process, stretchy generation curves workpiece be heated be out of shape, turning undertakes very hard, serious when can make workpiece gets stuck between the tip. Right now need is worn with the center or come with tool carrier bearing workpiece. 1) wears axis of bearing car slightness to be commonly when turning slightness axis with the center, will increase the tigidity of workpiece with central wearing, when workpiece can undertake section cutting, the center wears bearing to be among workpiece, if pursue,5 are shown. Before workpiece mount center is worn, must the groove that in semifinished product mid car goes center of a paragraph of bearing to wear bearing claw, its surface is rough reach columnar error to want small, be in bearing claw and workpiece contact place to often add lubricating oil. To raise workpiece precision, should adjust workpiece axes before turning as coaxial as centre of turning circle of machine tool main shaft. Graph when the 5 groove that wear axis of bearing turning slightness when turning bearing center with the center compare difficulty or a few middles do not need the long and thin axis of treatment, usable transfer sleeve, make bearing claw and transfer the outside surface contact of sleeve, if the graph is shown 6 times, transfer the two end of sleeve contain each 4 bolt, clip semifinished product surface with these bolt, the round axes outside adjusting sleeve and coincide of photograph of main shaft axis of rotation. C) use with tool carrier 1.

3 ungual chuck 2.

Workpiece 3.

With tool carrier 4.

Top chart 6 prop up long axis 2) to use with tool carrier with slightness of car of tool carrier bearing the axis is opposite the long and thin axis of unsuited tune turning, cannot wear bearing with the center, and should use undertake turning with tool carrier bearing, in order to increase the tigidity of workpiece, if pursue,6 are shown. Secure with tool carrier go up in bed saddle, have two bearing claw commonly, it can follow lathe tool is mobile, force of quits and radial cutting, the appearance precision that raises turning slightness axis and reduce exterior surface roughness, if graph 6a place is shown,follow tool carrier for two claw, because lathe tool gives the cutting of workpiece to fight force F ' R, make workpiece is stuck on the two bearing claw that follows tool carrier, but as a result of workpiece itself be down gravity, and bend accidentally, the generation when instantaneous of the meeting when turning leaves bearing claw, osculatory bearing claw is oscillatory. So idealer center wears need with 3 ungual centers, if pursue,6b place is shown. Right now, support work by 3 claw and lathe tool, made fluctuation, left and right sides cannot move, the stability when turning, not easy generation is oscillatory. 5.

With flower disc, dome board and pressing plate, bolt installation workpiece pursues 7 the workpiece with spare parts irregular appearance is installed on flower disc, cannot use the work of 3 claw or clip of outfit of 4 ungual chuck, usable flower disc holds clip. Flower disc is to install a on lathe main shaft big disc, dish a lot of long chamfer in order to on the face are worn put bolt, usable bolt installs workpiece to go up in flower disc directly, if pursue,7 are shown. OK also an auxiliary bearing angle iron (turn board) with bolt firm clip is held go up in flower disc, workpiece criterion installation is on turn board. The graph is shown 8 times to machine one bearing end panel and inside Kong Shi, in the condition that flower disc jacket places. When turning to prevent because of deflection of centre of gravity at the same time and generation is oscillatory, want to add balance iron in the across of workpiece. Workpiece needs in the position on flower disc via searching carefully. Graph 8 turn board is used to install a part on flower disc CNC Milling