Keyway Broaching Options
The Broach process provides the following options:
• Batch Setup Time: total setup time for a batch. This time is attributed to individual parts by dividing the batch setup time by the batch size specified on the Production Info tab of the Cost Object window.
o Use default value: the default is specified by the machine property Setup Time.
o User Override: specify a value in hours to override the default.
• Fixture Cost: contributes to total amortized investment.
o Use default value: the default is the product of the machine properties Fixture Build Rate and Fixture Build Time.
o User Override: specify a cost to override the default.
Keyway broaching operations provide the following options:
• Shims (Multipass Keyway Broaching only): number of shims used to make the keyway.
o Default Value: one less than the calculated number of broaching passes (see
Cycle Time for Machining Operations).
o User Value: enter the number of shims. Cycle time increases with the number of shims. Note that the number of broaching passes is one more than the number of shims, since the first pass doesn’t use a shim.
• Passes (Single Pass Keyway Broaching only): number of broaching passes performed to make the keyway.
o Default Value: calculated as described in
Cycle Time for Machining Operations.
o User Value: enter the number of passes. Cycle time increases with the number of passes.
• Cutting Speed: linear cutting speed of the broach in the pull direction.
o Default: By default this is specified by a tool property (see
Tool Selection for Keyway Broaching) and potentially adjusted as described in
Cycle Time for Machining Operations.
o User: enter the cutting speed. Cycle time decreases as cutting speed increases.
• Pitch: distance between the broach’s teeth.
o Default Value: specified by a tool property (see
Tool Selection for Keyway Broaching).
o User Value: enter the tooth pitch. Increasing tooth pitch effectively increases cutting length, which increases cutting time per pass—see
Cycle Time for Machining Operations.
• Teeth: number of teeth on the broach.
o Default Value: specified by a tool property (see
Tool Selection for Keyway Broaching).
o User Value: enter the number of tool teeth. Increasing the number of teeth effectively increases cutting length, which increases cutting time per pass; but it also increases cutting depth per pass, which might decrease the number of passes required—see
Cycle Time for Machining Operations.
• Feed per Tooth: depth of material removed (in the keyway depth direction) per tooth, per pass.
o Default Value: specified by a tool property (see
Tool Selection for Keyway Broaching).
o User Value: enter the feed per tooth. Increasing feed per tooth increases depth per pass, which can decrease cycle time—see
Cycle Time for Machining Operations.
• Repositioning Time: time to position the broach before each pass.
o Default Value: specified by the plant variable multipassKeywayBroachingPositioningTime or singlePassKeywayBroachingPositioningTime.
o User Value: enter the repositioning time. Total handling time is repositioning time multiplied by the number of passes. Increasing repositioning time increases handling time, which increases cycle time—see
Cycle Time for Machining Operations.