ASME B5.60:2002 pdf free download

ASME B5.60:2002 pdf free download WORKHOLDING CHUCKS: JAW TYPE CHUCKS Incorporating
INTRODUCTION
This American National Standard establishes techni-cal requirements for workholding chucks used primarilyin turning operations. It covers jaw type chucks whethermanual or power-operated.
2 sCOPE
This Part of the ASME B5.60 standard covers theGeneral Description and Definitions of Terms related
to jaw type workholding chucks.
3 TYPES OF JAw CHucKs BY DESIGN
self-centering chuck:a chuck in which all jaws moveto or away from the workpiece and maintain onecommon center.
compersating chuck:a chuck in which jaw(s) moveto or away from the workpiece without altering theposition of the workpiece.
irdeperdent chuck:a chuck in which each individualworkholding jaw is moved to or from the workpiecewithout disturbing the position of any other jaw.
An example of a power chuck assembly is presentedin Fig. 1.
4 METHODs OF ACTUATION
manval:a chuck that is actuated by hand with theaid of human energy (e.g..by means of a chuckwrench). Refer to Fig. 2.
power:a chuck that is actuated by means of pneumatic,hydraulic，or electrical energy.etc. Refer to Fig. 3.
5 DEFINITIONS
actuator:a component within a chuck’s body，usedto operate the chuck’s mechanism,such as a wedge,lever，scroll,etc.
base jaw:see master jaw.
centrifugal force: force generated by rotation thattends to move all parts away radially from the axisof rotation of the chuck.
chuck adaprer:interface between the machine and thechuck. It can be a separate component or integral tochuck body.
cuck body: that part of the chuck that contains theactuator and master jaws.
clamping cylinder:device that actuates the chuckthrough a draw bar or draw tube with the aid ofpneumatic or hydraulic energy.
clamping force:algebraic sum of the individual radialforces applied by the top jaws on the workpiece.clamping torque:product of the clamping force,clamping radius,and the coefficient of friction betweenthe top jaw(s) and the workpiece.
coutercentrifugal chuck:a chuck in which there isa system that permits compensation for the loss ofclamping force due to centrifugal force.
draw bar:a bar or tube that connects the clampingcylinder to the chuck’s actuator to transmit the inputforce to the chuck.
dynamic clamping force:actual clamping force whenthe chuck is rotating.
hysteresis:change in static clamping force after thechuck has been rotated at working rotational speedwith a constant input force.
inddicating band:a diameter on the chuck body desig-nated for measuring runout of a chuck.
inspu force:force acting on the chuck’s actuator,applied from an external energy source.
inpu torque:torque acting on the chuck’s actuator,applied from an external energy source.
master jaw:radial moving part within the chuck bodyto which the top jaw is mounted.
waxinasum rotational speed: maximum rotationalspeed in RPM specified by the manufacturer for a chuck with standard jaws in compliance with the manu-facturer’s instructions.
maximum static clamping force: maximum clampingforce obtained when the maximum permissible inputforce (or maximum input torque) is applied to a particu-lar chuck.
moment of inertia: moment of inertia with respect toa given axis is the limit of the sum of the productsof the mass of each of the elemental particles in whichthe body may be conceived to be divided and thesquare of their distance from the given axis.
rotational balance: equilibrium of all masses aroundthe axis of rotation [any difference(s) between the axis of rotation and the center of gravity will cause imbalance].