Machining method of punch press machine

• US 5,298,006 A
• Filed: 05/13/1993
• Issued: 03/29/1994
• Est. Priority Date: 10/03/1991
• Status: Expired due to Fees

• Current Assignee: Fanuc Ltd (Fanuc Corporation)
• Original Assignee: Fanuc Ltd (Fanuc Corporation)
• Inventors: Miyajima, Keiichiro
• Primary Examiner(s): BRIGGS, WILLIAM R
• Application Number:
  US08/050,335
• Time in Patent Office: 320 Days
• Field of Search: 483/1, 483/28, 483/29, 483/5, 483/6, 364/474.21, 364/474.34, 83/55, 83/50, 83/30, 83/39, 83/40, 83/76.6, 72/362, 408/1 R
• US Class Current: 483/1
• CPC Class Codes: G05B 19/408 characterised by data handling or data format, e.g. reading, buffering or conversion of data
• CPC Class Codes: G05B 2219/35262 Macro instruction, canned cycles, subroutines, subprogram
• CPC Class Codes: G05B 2219/45137 Punch, stamp, also with use die, mould
• CPC Class Codes: G05B 2219/50266 During tool change, workpiece immobile, then execute backward operation sequence
• CPC Class Codes: Y10T 483/10 Process
• CPC Class Codes: Y10T 83/0524 Plural cutting steps
• CPC Class Codes: Y10T 83/06 Blanking

Abstract

Disclosed is a machining method of a punch press machine by which a moving time of a workpiece table is excluded in a punch press machining to improve an operation efficiency. When the punch press machine is commanded to execute a machining for punching a multiplicity of products, a custom macro stored in the memory of a numerical control apparatus is read out (S3), if a tool change is commanded (S4), a tool is changed without moving the workpiece table on which a raw material sheet is fixed (S5) and a machining sequence is reversed (S6), an actual machining is executed by a tool in a forward or reverse machining sequence (S7), unless a custom macro is finished a next machining command is executed (S8), and a next custom macro is executed unless all the machinings are finished (S9), and thus a wasteful waiting time arisen when a tool is changed is excluded, whereby an operation efficiency can be improved.

Claims

1. A machining method of a punch press machine for punching a plurality of products from a single piece of a raw material sheet, comprising the steps of:

fixing a tool and punching said raw material sheet at grid positions in a particular sequence;

executing a tool change when a machining by said tool has been finished; and

executing a machining in a sequence opposite to said sequence.

2. A machining method of a punch press machine according to claim 1, wherein a machining by a tool is commanded by a custom macro.