Number-of-hits Options
The following processes provide setup options for controlling the total number of various types of hits (such as punch hits, nibble hits, or tap hits) used for the current part:
• Laser Punch
• Plasma Punch
• Turret Press
Each process provides the following number-of-hits-related options:
• Total Number of Punch Hits (for Punching, Perforating, Countersinking, Lancing, and Forming)
Laser Punch and Plasma Punch also provide the following setup option:
There are also GCD-level Options for controlling the number of hits performed to create a given GCD.
See also Perforating Setup Options.
Total Number of Punch Hits
This is the number of total number of hits performed by the following operations:
• Punching
• Perforating
• Countersinking
• Lancing
• Forming
• Flanging
• Piercing
By default, this is the sum of the total number of hits performed by each of these operations (see Perforating Setup Options and GCD-level Options). Enter a value to override the default.
Total Number of Nibble Hits
This is the total number of hits performed by the Nibble operation. By default, this is the sum of the nibble hits required for each GCD that is created by Nibbling (see GCD-level Options). Enter a value to override the default.
Total Number of Tap Hits
This is the total number of hits performed by the Tapping operation. By default, this is the sum of the tap hits required for each GCD on which Tapping is performed (see GCD-level Options). Enter a value to override the default.
Total Number of Pierce Hits
Laser Punch and Plasma Punch only. Specifies the total number of pierce hits performed prior to cutting. By default, the cost model assumes one pierce hit per instance of Laser Cutting or Plasma Cutting. With this setup option, users can override the default on a per-part basis.
GCD-level Options
There are also setup options for controlling the number of hits performed to create a given GCD. The GCD-level options are provided for GCDs created by the following operations:
• Punching
• Nibbling
• Countersinking
• Flanging
• Forming
• Tapping
For all these operations except Punching and Nibbling, the default number of hits is 1.
For Punching a SimpleHole or a curved Edge of a Blank or ComplexHole, the default number of hits is 1. For Punching a straight Edge of a Blank or ComplexHole, the default number of hits depends on the following:
• Length of the Edge
• Maximum tool overlap, specified by the machine property Max Tool Overlap
• Candidate tool sizes, specified by the machine properties Straight Length, 1 through Straight Length, 5
aPriori chooses the largest tool that will create the edge without excess overlap. The default number of hits is the edge length divided by the tool length, rounded up to the nearest integer:
Number of Punching Hits = roundup (Edge Length / Punching Tool Length)
For Nibbling a SimpleHole or the curved Edge of a Blank or ComplexHole, the default number of hits depends on the following:
• Circumference of the hole or length of the edge
• Nibble tool overlap. This is the fraction of the nibble tool diameter that should overlap the previously nibbled portion, specified by the machine property Nibble Tool Overlap.
• Nibble tool diameter (specified by the machine property Nibble Tool Diameter)
So the default number of hits is given by the following:
Number of Nibbling Hits = roundup (Hole Circumference or Edge Length /
(Nibble Tool Diameter – (Nibble Tool Overlap * Nibble Tool Diameter)))
Enter a value to override the default.