Major Work Activity G – Machines using precision grinding machines

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determine machining requirements

machining requirements are determined according to workpiece characteristics and operations to be performed

determine grinder required

grinder required is selected according to workpiece characteristics and operations to be performed

demonstrate knowledge of grinding machines and accessories, their applications, and procedures for use

define terminology associated with grinding machines

identify types of grinding machines and accessories and describe their applications

interpret documentation pertaining to the material to be ground

describe grinding operations to be performed

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identify grinding procedures

grinding procedures are identified according to workpiece characteristics and operations to be performed

establish order of procedures

order of procedures is established according to workpiece characteristics and operations to be performed

determine work holding devices

work holding devices are determined according to workpiece characteristics and operations to be performed

determine type and dimensions of material to be ground

type and dimensions of material to be ground are determined according to specifications

determine types, size and grades of grinding wheel

types, size and grades of grinding wheel are determined according to workpiece characteristics and operations to be performed

select honing stones

honing stones are selected according to specifications

determine workpiece setup procedure for surface grinder

workpiece setup procedure for surface grinder is determined according to specifications

determine workpiece setup procedure for cylindrical grinder

workpiece setup procedure for cylindrical grinder is determined according to specifications

determine workpiece setup procedure for tool and cutter grinder

workpiece setup procedure for tool and cutter grinder is determined according to specifications

demonstrate knowledge of grinding machines, their applications, and procedures for use

define terminology associated with grinding machines

identify types of grinding machines and accessories and describe their applications

interpret documentation pertaining to the material to be ground

identify types of work holding devices and describe their applications and maintenance

identify sequence of grinding operations

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position work holding devices

work holding devices are positioned to accommodate workpiece and operation

align workpiece and work holding devices

workpiece and work holding devices are aligned according to specifications

secure work holding devices

work holding devices are secured

demonstrate knowledge of grinding machines, their applications, and procedures for use

describe the procedures used to set up grinding machines and accessories

identify types of work holding devices and describe their applications and maintenance

describe the procedures used to align a workpiece and work holding devices

identify potential setup problems and describe their causes and solutions

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inspect and ring test grinding wheel

grinding wheel is inspected and ring tested for defects

secure wheel on adapters

wheel is secured on adapters using blotters and flanges

balance grinding wheel

grinding wheel is balanced using wheel balancing equipment

install balanced wheel assembly on machine

balanced wheel assembly is installed on machine according to specifications

true and dress mounted grinding wheel

mounted grinding wheel is trued and dressed using dressing tools

assess further balancing requirements and adjust, if required

further balancing requirements are assessed and required adjustments are made

demonstrate knowledge of grinding machines, their applications, and procedures for use

describe the procedures used to set up and mount wheels on grinding machines

identify types of wheel dressers and describe their applications

describe the procedures used to true and dress grinding wheels

describe procedures used to balance grinding wheels

describe the procedures used to inspect, maintain and store grinding wheels

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select accessories

accessories are selected according to specifications, workpiece characteristics and operations to be performed

inspect accessories

accessories are inspected for damage and defects

clean and check accessories and mounting surface

accessories and mounting surface are cleaned and checked to ensure accuracy

position, fasten and adjust accessories

accessories are positioned, fastened and adjusted to accommodate workpiece, machine and specifications

demonstrate knowledge of grinding accessories, their applications, and procedures for use

identify types of accessories used for grinding operations and describe their applications

describe the procedures used to set up grinding machines and accessories

describe the procedures used to inspect and maintain grinding machine accessories

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prepare workpiece and mounting surfaces

workpiece and mounting surfaces are prepared by eliminating burrs and debris

secure workpiece on surface grinder

workpiece is secured on surface grinder using surface grinder accessories

secure workpiece on cylindrical grinder

workpiece is secured on cylindrical grinder using cylindrical grinder accessories

secure workpiece on tool and cutter grinder

workpiece is secured on tool and cutter grinder using tool and cutter grinder accessories

check alignment of workpiece before grinding

alignment of workpiece is checked before grinding using inspection equipment to ensure accuracy

shim workpiece, if required

workpiece is shimmed to eliminate stressing of the material, if required

demonstrate knowledge of grinding machines, their applications, and procedures for use

describe the procedures used to set up workpieces on grinders using accessories

describe the procedures used to check alignment of workpieces

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identify type of material

type of material is identified according to specifications

determine and calculate precision grinding machine speeds

precision grinding machine speeds are determined and calculated according to factors

adjust feed control

feed control is adjusted to required rate

readjust machine controls

machine controls are readjusted according to cutting performance

demonstrate knowledge of precision grinding machines, their applications, and procedures for use

describe the factors used to determine feed and depth of cut for grinding operations

describe the calculations used to determine speed

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touch off grinding wheel on workpiece surface

grinding wheel is touched off on workpiece surface to establish a reference point

measure workpiece

workpiece is measured using inspection equipment to determine amount of excess material

remove excess material

excess material is removed according to specifications

identify problems

problems are identified

implement solutions

problems are eliminated

verify flat surface meets specifications

flat surface is verified to meet specifications using inspection equipment

demonstrate knowledge of surface grinders, their setup, maintenance and procedures for use

describe the procedures used to adjust and maintain surface grinding machines

describe the procedures used to perform surface grinding operations

identify potential problems and describe their causes and solutions

demonstrate knowledge of safety practices and procedures related to surface grinding

identify hazards and describe safe work practices pertaining to surface grinding

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dress grinding wheel

grinding wheel is dressed to desired profile using tools

touch off grinding wheel on workpiece surface

grinding wheel is touched off on workpiece surface to establish a reference point

measure workpiece

workpiece is measured to determine amount of excess material using inspection equipment

rough out workpiece profile

workpiece profile is roughed out to remove excess material leaving a finish grinding allowance

re-dress wheel

wheel is re-dressed to desired profile using tools

finish grind

grind is finished according to specifications

verify profile meets specifications

profile is verified according to specifications using inspection equipment

demonstrate knowledge of grinders, their setup, maintenance and procedures for use

describe the procedures used to calculate the amount of excess material

describe the procedures used to grind profiles

identify techniques used to troubleshoot profile grinding operations and describe their associated procedures

demonstrate knowledge of grinding wheels, their applications, maintenance and procedures for use

identify types of grinding wheels and describe their characteristics and applications

identify types of wheel dressers and describe their applications

describe the procedures used to true and dress grinding wheels

identify the considerations and requirements for selecting a grinding wheel for profile grinding

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dress grinding wheel

grinding wheel is dressed using tools

adjust table

table is adjusted according to required orientation

touch off grinding wheel on workpiece surface

grinding wheel is touched off on workpiece surface to establish a reference point

measure workpiece

workpiece is measured to determine amount of excess material using inspection equipment

rough out workpiece

workpiece is roughed out to remove excess material leaving a finish grinding allowance

re-dress wheel

wheel is re-dressed using tools

finish grind

grind is finished according to specifications

re-measure workpiece

workpiece is re-measured to confirm specifications are met using inspection equipment

demonstrate knowledge of cylindrical grinders, their setup, maintenance and procedures for use

describe the procedures used to align workpieces

describe the procedures used to perform calculations to determine amount of excess material

describe the procedures used to perform cylindrical grinding operations

describe the procedures used to calculate feed and depth of cut

identify techniques used to troubleshoot cylindrical grinding operations and describe their associated procedures

describe the procedures used to inspect and maintain cylindrical grinding machines

demonstrate knowledge of safety practices and procedures related to cylindrical grinding

identify hazards and describe safe work practices pertaining to cylindrical grinding

demonstrate knowledge of cylindrical grinding wheels, their applications, maintenance and procedures for use

identify types of cylindrical grinding wheels and describe their characteristics and applications

identify types of wheel dressers and describe their applications

describe the procedures used to true and dress grinding wheels

identify the considerations and requirements for selecting a grinding wheel for cylindrical grinding

describe the procedures used to mount and balance cylindrical grinding wheels

describe the procedures used to inspect, maintain and store cylindrical grinding wheels

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NV

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dress grinding wheel

grinding wheel is dressed using tools

mount cutting tools

cutting tools are mounted according to operations

set cutting tool rest

cutting tool rest is set to establish required relief angle and clearance according to specifications

touch off grinding wheel on workpiece surface

grinding wheel is touched off on workpiece surface to establish a reference point

grind cutting edge of tools

cutting edge of tools are ground to establish required tool geometry

demonstrate knowledge of tool and cutter grinders, their setup, maintenance and procedures for use

describe the procedures used to set up tool and cutter grinders and accessories

identify types of cutting tools and describe their applications

describe the procedures used to align cutting tools

demonstrate knowledge of tool and cutter grinding wheels, their applications, maintenance and procedures for use

identify types of tool and cutter grinding wheels and describe their characteristics and applications

identify types of wheel dressers and describe their applications

describe the procedures used to true and dress grinding wheels

identify the considerations and requirements for selecting a grinding wheel for tool and cutter grinding

describe the procedures used to mount and balance tool and cutter grinding wheels

describe the procedures used to inspect, maintain and store tool and cutter grinding wheels

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NV

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identify type of material to be honed

type of material to be honed is identified according to specifications

monitor stone pressure

stone pressure is monitored to eliminate distortion and optimize material removal

match stroke to rpm

stroke is matched to rpm to achieve finish according to specifications

identify problems

problems are identified

implement solutions

problems are eliminated

check dimension of holes

dimension of holes is checked according to specifications using inspection equipment

demonstrates knowledge of honing machines, their setup, maintenance and procedures for use

identify types of honing machines, their setup and maintenance

identify types of tooling required for honing

identify honing techniques and describe their associated procedures

identify potential problems and describe their causes and solutions