Method for controlling a bending process for bending a bending body

Patent metadata

Field	Value
Publication number	US-12030109-B2
Application number	US-202017427979-A
Country	US
Kind code	B2
Filing date	Feb 18, 2020
Priority date	Mar 12, 2019
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

A bending process is controlled for bending a bending body, such as a bending profile. A bending device has a bending unit provided with at least one bending element that executes a defined movement based on a control signal. A data processing process is carried out in which a target geometry of the bent bending body is described in the form of target bending information by comparing at least two coordinate systems. A bending process is carried out, wherein before and/or during the bending process, the control signal controlling the at least one bending element is used on the basis of the target bending information to bend the bending body using the at least one bending element.

First claim

What is claimed is:

1. A method for controlling a bending process for bending a bending body using a bending device comprising a bender and a bending element, the method comprising:
executing a data processing process comprising:
describing an item of target geometry of the bent bending body in an intended bending information by comparing at least two coordinate systems; and

executing a bending process, comprising:
before and/or during the bending process, controlling the bending element by a control signal based on the intended bending information to bend the bending body using the bending element, wherein
a first coordinate system of the at least two coordinate systems is arranged on or in a static guide section of the bending device, and
a second coordinate system of the at least two coordinate systems is arranged:
on the bending body, or
in a displacement direction of the bending body in the bending device within an action region of the bending element.

2. The method according to claim 1 , wherein
the comparison of the at least two coordinate systems takes place with respect to a translational and/or rotational change.

3. The method according to claim 1 , wherein
a boundary condition information influences the bending process and comprises one or more of the following items:
an item of material information on a material of the bending body,
an item of geometry information of the bending body, and/or
an item of bending device information on the bending device; and

the intended bending information is deliberately changed based on an item of the boundary condition information.

4. The method according to claim 3 , wherein
the item of boundary condition information is at least partially acquired by a camera or sensor arranged on the bending device.

5. The method according to claim 3 , wherein
the item of material information on a material of the bending body comprises:
at least one chemical and/or physical property specific to a region of the bending body before, during, and/or after the bending process, comprising:
a density of the bending body,
a specific heat capacity of the bending body,
a specific resistance of the bending body,
a temperature coefficient of the bending body,
a coefficient of thermal expansion of the bending body,
a normal melting point of the bending body,
a permeability of the bending body,
a index of refraction of the bending body,
a modulus of elasticity of the bending body, and/or
a shear modulus of the bending body.

6. The method according to claim 3 , wherein
the geometry information comprises:
the geometrical shape of the bending body before, during, and/or after the bending process, comprising:
a wall thickness of the bending body formed at least in sections as a hollow body,
a length and/or width extent of the bending body,
an area extent of the bending body, and/or
a volume extent of the bending body.

7. The method according to claim 3 , wherein
the bending device information on the bending device comprises one or more of:
an item of aging information relating to an aging of the bending device,
an item of tolerance information relating to a tolerance of at least one movable bending element of the bending device, and/or
an item of temperature information relating to a temperature of the bending element.

8. The method according to claim 1 , wherein
the intended bending information is changed by an item of correction information, wherein
the correction information is formed based on
an item of finite element method (FEM) information determined by a bending process simulated by a FEM process, and/or
an item of deviation information determined by production of a test bending component by the bending device and a comparison of the test bending component to the target geometry.

9. The method according to claim 1 , wherein
the bending element is used that is arranged or formed movably in at least one translational and/or rotational degree of freedom relative to a further bending element active in bending for the bending body.

10. The method according to claim 1 , wherein
the bending device comprises at least two bending elements,
the first bending element executes a movement along at least one first degree of freedom before or during the bending process, and
the second bending element executes a movement along at least one second degree of freedom different from the at least one first degree of freedom before or during the bending process.

11. The method according to claim 1 , wherein
the bending body is used as a vehicle component installed in a motor vehicle.

12. A control device for controlling the bending element of the bending device for bending a bending profile, which is configured to execute a method according to claim 1 .

13. A bending device for bending a bending profile, which is configured to execute a method according to claim 1 .

14. A motor vehicle component, produced in a method according to claim 1 .

15. A method for controlling a bending process for bending a bending body using a bending device comprising a bender and a bending element, the method comprising:
executing a data processing process comprising:
describing an item of target geometry of the bent bending body in an intended bending information by comparing at least two coordinate systems; and

executing a bending process, comprising:
before and/or during the bending process, controlling the bending element by a control signal based on the intended bending information to bend the bending body using the bending element, wherein
a first coordinate system of the at least two coordinate systems is arranged at a first action region of a first movable bending element of the bending device,
a second coordinate system of the at least two coordinate systems is arranged at a second action region of a second bending element of the bending device, different from the first movable bending element, and
upon movement of the first movable bending element and/or the second bending element, a corresponding movement takes place of the coordinate system assigned to the respective bending element.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Beulich Nikolas

Classifications

• G05B2219/45143

  Press-brake, bending machine · CPC title

• G05B19/402 Primary

  characterised by control arrangements for positioning, e.g. centring a tool relative to a hole in the workpiece, additional detection means to correct position (G05B19/19 takes precedence) · CPC title

• B21D7/08

  by passing between rollers or through a curved die · CPC title

• B21D7/12 Primary

  with program control · CPC title

• B21D7/16

  Auxiliary equipment, e.g. for heating or cooling of bends · CPC title