Local strength-varying design method for automobile parts

A technology of auto parts and design methods, applied in the field of heat treatment, to achieve the effect of improving the level of energy absorption, stabilizing the plastic deformation of axial crushing, and improving the versatility

Active Publication Date: 2018-08-24
易清汽车安全系统(苏州)有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in addition to changing the material, without increasing the weight, in the existing strengthening technology for automobile body parts, it is impossible to set other parts according to the load conditions of the parts and the needs of energy absorption. Problems with Adaptive Local Strength

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  • Local strength-varying design method for automobile parts
  • Local strength-varying design method for automobile parts
  • Local strength-varying design method for automobile parts

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Embodiment Construction

[0027] A kind of technology of auto parts local variable strength design method comprises the following steps:

[0028] Step 1: Determine the impact direction of the component, and calculate the equivalent width of the cross section of the component perpendicular to the impact direction, material thickness, and yield strength of the base metal;

[0029] Step 2: Determine whether there is an edge perpendicular to the impacted direction on the component, and if so, perform laser quenching on the edge; if figure 1 The shown arc width for quenching the edge satisfies the formula: That is, according to this formula, the arc width during edge quenching can take into account the equivalent width c of the cross section of the part and the thickness h of the steel plate. This is to realize that strip-shaped parts can improve their strength when receiving lateral impacts. For example, if they are applied in the ABC column of a car body, they can effectively improve the impact protecti...

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Abstract

A local strength-varying design method for automobile parts includes the steps of: 1) determining the impact direction of an automobile part and calculating the cross section equivalent width, material thickness and base material yield strength, which are vertical to the impact direction, of the part; 2) determining whether the part has a rib being vertical to the impact direction or not, if true,performing laser quenching to the rib; 3) if the part has a rib in parallel with the impact direction, reinforcing the rib, or performing 360-degree laser quenching in a cross section, being verticalto the impact direction, of the part, thus forming a plurality of strength-varying rings, which are distributed on the part at intervals; 4) performing entire tempering thermal treatment to the part.The method can induce elastic-plastic buckling deformation of the part and also improve energy absorption level and anti-instable capability of the part. In the method, an inner-concave-outer-convexperiodical deformation mode is replaced by an all-concave deformation mode, so that axial crushing plastic deformation is more stable.

Description

technical field [0001] The invention relates to the field of heat treatment, in particular to a method for designing local variable strength of auto parts. Background technique [0002] It is generally believed that the safety of the car body is not safe, the important thing is that the car body is not firm, and the thicker the steel plate, the safer it is. But the design of modern cars is not considered in this way. From the perspective of mechanical research, the designer makes soft places that should be soft, and hard places that should be hard. To the role of energy absorption and dispersion, try to weaken the impact of the body, so as to maximize the protection of the safety of drivers and passengers. Under the condition that global automakers are pursuing lightweight bodywork, while ensuring the firmness of the passenger compartment and reducing the damage to occupants due to impact forces, the strength design of the body structure is very critical. The crashworthy b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/09C21D1/18C21D9/00C21D11/00B62D65/00
Inventor 郑玉卿朱西产马志雄董学勤
Owner 易清汽车安全系统(苏州)有限公司
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