Machine tool control system and method utilizing metal mold arrangement information

• US 5,943,240 A
• Filed: 10/09/1996
• Issued: 08/24/1999
• Est. Priority Date: 10/09/1996
• Status: Expired due to Fees

• Current Assignee: Kaoru Nakamura
• Original Assignee: Kaoru Nakamura
• Inventors: Nakamura, Kaoru
• Primary Examiner(s): Grant, William
• Assistant Examiner(s): PATEL, RAMESH B
• Application Number:
  US08/728,181
• Time in Patent Office: 1,049 Days
• Field of Search: 364/475.02, 364/475.01, 364/418.06, 364/468.04, 364/472.01, 364/472.02, 364/474.21, 364/474.22, 364/475.06, 364/188, 364/189 , 364/191-193, 364/479.14, 364/474.26, 364/474.27, 483/1, 483/4, 483/5, 483/7, 483/8, 483/9, 483/11
• US Class Current: 700/197
• CPC Class Codes: B21D 28/12 Punching using rotatable carriers
• CPC Class Codes: B23Q 3/15573 the tool being taken from a storage device and transferred to a tool holder by means of transfer devices
• CPC Class Codes: B23Q 3/16 controlled in conjunction with the operation of the tool
• CPC Class Codes: G05B 19/4187 by tool management
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
• CPC Class Codes: Y10T 483/132 Responsive to tool identifying information
• CPC Class Codes: Y10T 483/134 Identifying information on tool or tool holder

Abstract

A machine tool control system and method are provided that utilize metal mold arrangement information to improve machining efficiency and control. According to the disclosure, a machining schedule, a machining program and metal mold information (indicating the characteristic properties of a metal mold to carry out machining) are transferred to a controller for controlling a CNC device and a machine tool unit (e.g., a turret punch press). The controller transfers the metal mold information for the machining program to the CNC device by a different transfer route than that of the machining program. The CNC device searches for a metal mold specified by the metal mold information based on metal mold arrangement information stored in a file. The metal mold arrangement information indicates each metal mold that is located in the machine tool unit. If a specified metal mold is not present, a metal mold exchange instruction is issued so that the specified metal mold may be set in the machine tool unit to carry necessary machining operations.

Claims

1. A machine tool control system for controlling a machine tool unit that carries out machining based on a machining program of a machining schedule, said machine tool unit including a CNC device, a turret for supporting a plurality of metal molds and a tool storage unit for storing a plurality of metal molds, said machine tool control system comprising:

a metal mold arrangement information file that stores metal mold arrangement information indicating each metal mold located in the tool storage unit of the machine tool unit; and

a controller that stores the machining schedule and metal mold information indicating characteristic properties of a metal mold to be used by the machine tool unit for machining based on each machining program associated with the machining schedule, said controller comprising;

a program transfer unit for transferring a machining program to the CNC device of the machine tool unit; and

a dedicated line for transferring the metal mold information to the CNC device by a different route than that for each respective machining program,

wherein said CNC device searches the metal mold arrangement information stored in the metal mold arrangement information file to determine if each metal mold specified by the metal mold information is located in the machine tool unit, said CNC device transmitting metal mold exchange instruction information when a specified metal mold is determined not to be present, to facilitate setting a specified metal mold in the turret of the machine tool unit to carry out machining according to the associated machining program.

2. A machine tool control system according to claim 1, wherein said machine tool unit comprises a metal mold arrangement information transfer unit that detects each metal mold that is located in respective boxes of the tool storage unit and located in respective metal mold mount stations of the turret, and transfers the metal mold arrangement information indicating the location of each metal mold to the metal mold arrangement information file for storage in the metal mold arrangement information file.

3. A machine tool control system according to claim 1, wherein said controller further comprises a metal mold information pre-transfer unit that pre-reads a machining program for the next machining schedule after a current machining program has been transferred by the program transfer unit and determines whether manual exchange of a metal mold for metal mold setup is required for the next machining schedule, said metal mold information pre-transfer unit transferring metal mold information for the next machining schedule to the CNC device by said dedicated line when it is determined that manual exchange of a metal mold is required.

4. A machine tool control system according to claim 1, wherein said CNC device comprises a metal mold manual exchange instruction unit that causes a display unit to display a message to an operator for instructing manual exchange with a metal mold specified by the metal mold information when the specified metal mold is determined not to be present based on the metal mold arrangement information.

5. A machine tool control system according to claim 1, wherein said machine tool unit comprises a turret punch press.

6. A machine tool control system according to claim 1, wherein said CNC device comprises an automatic metal mold exchanging unit that takes a specified metal mold from the tool storage unit and sets the specified metal mold in the turret of the machine tool unit.

7. A machine tool control method for controlling a machine tool unit that carries out machining based on a machining program of a machining schedule, said machine tool unit including a CNC device, a turret for supporting a plurality of metal molds and a tool storage unit for storing a plurality of metal molds, said method comprising:

storing, in a metal mold arrangement information file, metal mold arrangement information indicating each metal mold located in the machine tool unit;

storing, in a controller, the machining schedule and metal mold information indicating characteristic properties of a metal mold to be used by the machine tool unit for machining based on each machining program associated with the machining schedule;

transferring a machining program from the controller to the CNC device of the machine tool unit and, thereafter, transferring the metal mold information from the controller to the CNC device by a different route than that for each respective machining program;

transferring each machining program from said CNC device to the machine tool unit;

searching the metal mold arrangement information stored in the metal mold arrangement information file to determine if each metal mold specified by the metal mold information is located in the machine tool unit; and

transmitting metal mold exchange instruction information when a specified metal mold is determined not to be present, so that the specified metal mold may be set in the machine tool unit to carry out machining according to the associated machining program.

8. A machine tool control method according to claim 7, wherein said method further comprises:

detecting each metal mold that is located in respective boxes of the tool storage unit and located in respective metal mold mount stations of the turret;

transferring, based on said detecting, the metal mold arrangement information indicating the location of each metal mold to the metal mold arrangement information file; and

thereafter, storing the metal mold arrangement information in the metal mold arrangement information file.

9. A machine tool control method according to claim 7, wherein said method further comprises:

pre-reading a machining program for the next machining schedule after a current machining program has been transferred to the machine tool unit;

determining whether manual exchange of a metal mold for metal mold setup is required for the next machining schedule; and

based on said determining, transferring metal mold information for the next machining schedule to the CNC device when it is determined that manual exchange of a metal mold is required.

10. A machine tool control method according to claim 7, wherein said method further comprises, displaying on a display unit, a message for instructing manual exchange with a metal mold specified by the metal mold information when the specified metal mold is determined not to be present based on the metal mold arrangement information.

11. A machine tool control method according to claim 7, wherein said machine tool unit comprises a turret punch press.

12. A machine tool control method according to claim 7, wherein said method further comprises taking a specified metal mold from the tool storage unit and setting the specified metal mold in the turret of the machine tool unit.