PLASTIC FORMING METHOD

• US 20130218544A1
• Filed: 02/20/2013
• Published: 08/22/2013
• Est. Priority Date: 02/21/2012
• Status: Abandoned Application

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: EMRICH, Albert
• Application Number:
  US13/771,230
• Publication Number:
  US 20130218544A1
• Time in Patent Office: Days
• US Class Current: 703/8
• CPC Class Codes: G06F 2111/08 Probabilistic or stochastic CAD
• CPC Class Codes: G06F 2113/24 Sheet material
• CPC Class Codes: G06F 30/15 Vehicle, aircraft or watercraft design
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30
• CPC Class Codes: G06F 30/23 using finite element methods [FEM] or finite difference methods [FDM]
• CPC Class Codes: Y02T 90/00 Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

Abstract

A method for plastically forming a plate is provided. The method includes simulating forming the plate based on a frictional parameter that locally varies.

Claims

1. A method for plastically forming a plate (P), in particular into a vehicle body component, wherein forming is simulated (S60) based on a frictional parameter (μ

) that locally varies (μ

_ij≠

μ

<sub>(u≠

i)(n≠

j)</sub>).

2. The method according to claim 1, wherein the frictional parameter (μ

) varies in a locally stochastic manner (S50).

3. The method according to one of the preceding claims, wherein the frictional parameter (μ

) is determined based on a lubricant distribution (s(b)) (S40), which varies locally, in particular stochastically (S20).

4. The method according to the preceding claim, wherein a virtual lubricant distribution (s″

(b)) on an edge of the plate (P) exhibits a lubricant accumulation (S10).

5. The method according to one of preceding claims 3 to 4, wherein the lubricant distribution (s′

(b)) is determined based on a simulated lubricant transfer between a tool and the plate (P) (S30).

6. The method according to one of preceding claims 3 to 5, wherein frictional parameter (μ

) is empirically determined based on the lubricant distribution (s(b)), in particular based on a strip tensile test (S40).

7. The method according to one of the preceding claims, wherein the simulation is used as the basis for specifying a lubricant, a lubricant quantity and/or a treatment of the plate (P), and/or identifying the process robustness (S70).

8. A computer program product, on which is stored a computer program is set up to execute a process according to one of the preceding claims when running in a computer.

9. A device for simulating the plastic forming of a plate, in particular into a vehicle body component, wherein the device is set up to execute a process according to one of the preceding claims 1 to 7.