Method of bending operations and bending system using the same

• US 6,038,899 A
• Filed: 05/20/1998
• Issued: 03/21/2000
• Est. Priority Date: 12/20/1996
• Status: Expired due to Fees

• Current Assignee: Amada Company Limited
• Original Assignee: Amada Company Limited
• Inventors: Nagasawa, Tadahiko
• Primary Examiner(s): JONES, DAVID B
• Application Number:
  US09/082,005
• Time in Patent Office: 671 Days
• Field of Search: 72/14.8, 72/379.2, 72/389.1, 72/389.3, 72/420, 72/461
• US Class Current: 72/14.8
• CPC Class Codes: B21D 5/02 on press brakes without making use of clamping means
• CPC Class Codes: B21D 5/0209 Tools therefor
• CPC Class Codes: G05B 19/4093 characterised by part programming, e.g. entry of geometrical information as taken from a technical drawing, combining this with machining and material information to obtain control information, named part programme, for the NC machine
• CPC Class Codes: G05B 19/40937 concerning programming of machining or material parameters, pocket machining
• CPC Class Codes: G05B 19/4097 characterised by using design data to control NC machines, e.g. CAD/CAM G05B19/4093 takes precedence
• CPC Class Codes: G05B 2219/35192 From design derive sequence of bending so that bending is possible
• CPC Class Codes: G05B 2219/35196 From workpiece data derive assembly tool data
• CPC Class Codes: G05B 2219/36203 Bending of workpiece, also for long slender workpiece
• CPC Class Codes: G05B 2219/45143 Press-brake, bending machine
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A method and system are provided that enable an operator without skills in performing bending operations to easily and quickly perform precise bending operations on a sheet workpiece by following a skilled operator'"'"'s experience, hints or data. The method may include: storing data for a shape of a part; storing data related to a bending order for manufacturing the part from a workpiece; selecting tools for performing each bending operation; storing data for the selected tools or dies; storing bending press control data for controlling the operation of the bending press to perform the bending operations in accordance with the bending order; and storing bending operation support information for supporting an operator for performing the bending operations by using the bending press. The bending operation support information may include hints or information regarding at least one of the following operations: attaching a protective tape on the shoulder of a die; arranging small tools on the bending press so that a punch and die are laterally shifted from each other; attaching a small die on a ram with a fixing tape; aligning a punch and die relative to each other in a longitudinal direction; determining an original point of one of the punch and die relative to each other; positioning a workpiece relative to a punch and die; positioning a workpiece relative to a backgauge device; and checking a dimension of a shape of the workpiece after performing a bending operation.

Claims

1. A method of preparing data for manufacturing a product or a part with a predetermined shape by using a bending press provided with detachable tools, said method comprising entering bending operation support information, into a computer memory, after successfully completing bending operations, in order to support an operator later performing bending operations on a workpiece to manufacture said product or part, said bending operation support information being specific to the completed bending operations.

2. The method of claim 1, said method further comprising:

entering shape data relating to said part or product;

entering a bending order for manufacturing said part or product from said workpiece; and

entering tool data for specifying tools for performing said bending operations to manufacture said part or product.

3. The method of claim 2, said method further comprising entering bending press control data for controlling said bending press to perform said bending operations in said bending order.

4. The method of claim 2, said method further comprising:

performing an alignment of said tools in a longitudinal direction of said bending press before performing said bending operations; and

storing support information regarding an execution of the alignment of said tools in the longitudinal direction.

5. The method of claim 2, said method further comprising:

performing an original-point adjustment operation to adjust an original point of a die with respect to a punch; and

storing supporting information regarding an execution of the original-point adjustment operation.

6. The method of claim 2, said method further comprising:

performing a trial bending operation for each of said bending operations to be performed on said workpiece; and

storing support information regarding a frequency of checking an accuracy of dimensions of said workpiece.

7. The method of claim 2, said method further comprising:

performing an original-point adjustment operation to determine an original point of a die with respect to a punch; and

storing control data D, L and Yz for performing said bending operations with said bending press, wherein D specifies a vertical position of the die relative to the original point of the die, L specifies a position of a backgauge device in a lateral direction relative to a central position of the die, and Yz specifies a vertical position of the backgauge device relative to a top end position of the die.

8. The method of claim 1, said method further comprising:

performing an alignment of tools in a longitudinal direction of said bending press before performing said bending operation; and

storing support information regarding an execution of the alignment of tools in the longitudinal direction.

9. The method of claim 1, said method further comprising:

performing an original-point adjustment operation to adjust an original point of a die with respect to a punch; and

storing support information regarding an execution of the original-point adjustment operation.

10. The method of claim 1, said method further comprising:

performing a trial bending operation for each of said bending operations to be performed on said workpiece; and

storing support information regarding a frequency of checking an accuracy of dimensions of said workpiece.

11. The method of claim 1, said method further comprising:

performing an original-point adjustment operation to determine an original point of a die with respect to a punch; and

storing control data D, L and Yz for performing said bending operations with said bending press, wherein D specifies a vertical position of the die relative to the original point of the die, L specifies a position of a backgauge device in a lateral direction relative to a central position of the die, and Yz specifies a vertical position of the backgauge device relative to a top end position of the die.

12. A method of generating data for manufacturing a part by bending a workpiece along a plurality of bending lines with a bending press that includes detachable tools, said method comprising:

storing data for a shape of said part in a computer memory;

storing data indicating an order of bending operations in which the workpiece is bent along the bending lines in the computer memory;

selecting tools for performing each of said bending operations along the bending lines;

storing data for the selected tools in the computer memory;

storing bending press control data in the computer memory for controlling said bending press to perform said bending operations in said bending order; and

storing bending operation support information in the computer memory, after successfully completing bending operations, to support an operator later performing said bending operations with the bending press, wherein said storing of said bending operation support information comprises storing support information regarding operation of at least one of the following;

attaching protective tape on a shoulder of a die;

arranging small tools on said bending press so that a punch and a die are laterally shifted from each other;

attaching a small die on a ram with fixing tape;

aligning a punch and a die relative to each other in a longitudinal direction;

determining an original point of a punch or a die relative to the other;

positioning said workpiece relative to a punch and a die;

positioning said workpiece relative to a backgauge device; and

inspecting dimensions of a shape of said workpiece after performing one of said bending operations.

13. A method of manufacturing a part by bending a workpiece along a plurality of bending lines with a bending press that includes a detachable tool, said method comprising:

storing data for a shape of said part in a computer memory;

storing data in the computer memory indicating a bending order for manufacturing said part from said workpiece;

selecting tools for performing each of said bending operations in said bending order;

storing data for specifying the selected tools in the computer memory;

mounting said selected tools on said bending press;

storing bending press control data in the computer memory for controlling said bending press to perform each of said bending operations;

bending said workpiece in said bending order in accordance with the bending press control data for each of said bending operations; and

thereafter storing bending operation support information in the computer memory to support an operator later performing bending operations, wherein said storing of said bending operation support information comprises storing support information regarding operation of at least one of the following;

attaching protective tape on a shoulder of a die;

arranging small tools on said bending press so that punch and a die are laterally shifted from each other;

attaching a small die on a ram with fixing tape;

aligning a punch and a die relative to each other in a longitudinal direction;

determining an original point of a punch or a die relative to the other;

positioning said workpiece relative to a punch and a die;

positioning said workpiece relative to a backgauge device; and

checking a dimension of a shape of said workpiece after performing one of said bending operations.

14. A method of manufacturing a part by bending a workpiece along a plurality of bending lines with a bending system, said method comprising:

determining a bending order and tools to manufacture said part in accordance with a shape of said part;

storing the determined bending order and the tools in a computer memory;

selecting the determined tools from a tool storage;

determining an arrangement of the tools on said bending press;

storing the determined arrangement of said tools in the computer memory;

mounting said tools on said bending press in accordance with said determined arrangement;

determining an attitude of the workpiece to be fed into said bending press at each bending step;

storing the determined attitude of the workpiece for each bending step in a computer memory; and

feeding the workpiece into said bending press with said attitude for each bending step and bending the workpiece along the bending lines with said bending press.

15. A system for generating data for manufacturing a part by bending a workpiece along a plurality of bending lines with a bending press that has detachable tools, the system including a computer memory, the system comprising:

a memory section that stores data relating to a shape of said part;

a memory section that stores data indicating a bending order for manufacturing said part from said workpiece;

a memory section that stores data for specifying the selected dies for each bending operation;

a memory section that stores bending press control data for controlling said bending press to perform each bending operations in said bending order; and

a memory section that stores bending operation support information for supporting an operator to perform each bending operation by using said bending press, wherein said storing of said bending operation support information occurs after successfully completing bending operations and comprises storing support information regarding the operation of at least one of the following;

attaching protective tape on a shoulder of a die;

arranging small tools on said bending press so that a punch and a die are laterally shifted from each other;

attaching a small die on a ram with fixing tape;

aligning a punch and a die relative to each other in a longitudinal direction;

determining an original point of a punch and a die relative to the other;

positioning said workpiece relative to a punch and a die;

positioning said workpiece relative to a backgauge device; and

checking a dimension of a shape of said workpiece after performing a bending operation.

16. A system for generating data for manufacturing a part, said system comprising:

a server provided with a database for storing various data relating to completed bending operations for manufacturing a part, and a bar code generator for generating a bar code in relation to the part to be produced by said bending press; and

a terminal computer for controlling said bending press, said terminal computer being connected to said server to support data communications with said server, said terminal computer comprising a bar code reader for reading a bar code and retrieving data concerning the part from said database of said server.

17. The system of claim 16, further comprising a memory section that stores support information regarding execution of an original-point adjustment operation performed to adjust an original point of a die with respect to a punch.

18. The system of claim 16, further comprising a memory section that stores support information regarding a frequency of checking an accuracy of dimensions of said workpiece.

19. The system of claim 16, flyer comprising a memory section that stores control data D, L and Yz for performing said bending operations with said bending press, wherein D specifies a vertical position of a die relative to an original point of the die, L specifies a position of a backgauge device in a lateral direction relative to a central position of the die, and Yz specifies a vertical position of the backgauge device relative to a top end position of the die.

20. A method for generating data for manufacturing a part by bending a workpiece with a bending press, said method comprising:

storing data that specifies a shape of said part in a computer memory;

storing data indicating an order of performing bending operations on said workpiece with said bending press in the computer memory;

storing data that specifies tools for performing each of said bending operations in the computer memory, said tools comprising a punch and a die;

performing an original-point adjustment operation to adjust an original point of the die with respect to the punch, and storing bending operation support information regarding an execution of the original-point adjustment operation in the computer memory after successfully executing the original-point adjustment operation; and

performing a trial bending operation for each of said bending operations to be performed on said workpiece, and storing bending operation support information regarding a frequency of checking an accuracy of dimensions of said workpiece in the computer memory after successfully executing the trial bending operation.

21. The method of claim 20, further comprising storing control data D, L and Yz for performing said bending operations with said bending press in the computer memory, wherein D specifies a vertical position of the die relative to the original point of the die, L specifies a position of a backgauge device in a lateral direction relative to a central position of the die, and Yz specifies a vertical position of the backgauge device relative to a top end position of the die.

22. The method of claim 21, further comprising storing bending operation support information that specifies dimensions of said workpiece to be checked for accuracy in the computer memory, and modifying the control data D and L, during a trial bending operation, when the dimensions of said workpiece are checked and determined not to be within a predetermined tolerance.

23. A method for generating data for manufacturing a part by bending a workpiece with a bending press, said method comprising:

storing data that specifies a shape of said part in a computer memory;

storing data indicating an order for performing bending operations on said workpiece with said bending press in the computer memory;

storing data that specifies tools for performing each of said bending operations in the computer memory, said tools comprising a punch and a die;

determining an arrangement of said tools on said bending press;

mounting said tools on said bending press in accordance with said determined arrangement;

performing an original-point adjustment operation to adjust an original point of the die with respect to the punch, and storing bending operation support information regarding an execution of the original-point adjustment operation in the computer memory;

performing a trial bending operation for each of the bending operations to be performed on said workpiece; and

storing control data D, L and Yz for performing the bending operations with said bending press in the computer memory, wherein D specifies a vertical position of the die relative to the original point of the die, L specifies a position of a backgauge device in a lateral direction relative to a central position of the die, and Yz specifies a vertical position of the backgauge device relative to a top end position of the die.

24. The method of claim 23, further comprising:

storing bending operation support information regarding a frequency of checking an accuracy of dimensions of said workpiece in a computer memory;

storing bending operation support information that specifies dimensions of said workpiece to be checked for accuracy in the computer memory; and

modifying the control data D and L, during a trial bending operation, when the dimensions of said workpiece are checked and determined not to be within a predetermined tolerance.