Novel tailored blank laser welding automobile structural stand column

Abstract

The utility model provides a novel tailored blank laser welding automobile structural column which comprises a base plate and a patch plate, the base plate is formed by connecting a first base material and a second base material through tailored blank laser welding, and the thickness of the first base material is larger than that of the second base material; a patch plate is overlaid on the inner side of the substrate and overlaid on the first base material, and the tail end of the patch plate extends towards the second base material. A hot stamping forming process can be supported, and accurate forming of a laser tailor-welded blank and a patch plate B column can be achieved through the process; the utility model aims to provide a novel tailored blank laser welded structural upright column for an automobile so as to realize a high-strength and light-weight automobile body structure.

Description

Technical Field

[0001] The utility model belongs to the field of laser-welded B-pillars, in particular to a novel laser-welded automobile structural pillar. Background Art

[0002] The modern automotive industry faces challenges in its pursuit of sustainable development, particularly in reducing CO2 emissions and improving energy efficiency. To achieve this goal, the automotive industry is increasingly adopting hot stamping processes for high-performance laser-welded B-pillars and patch panels. Patchwork blanks are thickened sheets created by locally attaching a sheet to a base plate. The attached sheet strengthens the structural load-bearing capacity of the component.

[0003] A structural pillar, also known as a B-pillar, is typically located on each side of a vehicle. The B-pillar is the primary load-bearing structure in a side impact. The B-pillar's deformation pattern, intrusion volume, and intrusion velocity during a side impact directly impact occupant safety. In automotive manufacturing, the B-pillar, a crucial component of the vehicle's structure, is crucial for its strength and safety. Utility Model Content

[0004] In view of this, the present invention aims to propose a novel laser-welded automotive structural pillar to achieve a high-strength and lightweight vehicle body structure.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A novel laser-welded automotive structural pillar comprises a base plate and a patch plate. The base plate is formed by laser-welding a first parent material and a second parent material, wherein the first parent material is thicker than the second parent material. The patch plate is stacked on the inner side of the base plate, and the patch plate is stacked on the first parent material, with its end extending toward the second parent material.

[0007] Furthermore, the base plate is superimposed with a patch plate by resistance spot welding to form an integrated laser-welded B-pillar substrate.

[0008] Furthermore, the laser-welded B-pillar substrate is formed into an automobile laser-welded B-pillar by hot stamping.

[0009] Furthermore, the outer contour of the patch plate is consistent with the outer contour of the base plate.

[0010] Furthermore, the thickness of the first mother material is 2.2 mm, and the thickness of the second mother material is 1.5 mm.

[0011] Furthermore, the thickness of the patch plate is 1.8 mm.

[0012] Furthermore, the first mother material, the second mother material and the patch plate are made of 1500HS-AS material.

[0013] Compared with the existing technology, the novel laser-welded automotive structural pillar described in the present invention has the following advantages:

[0014] The new laser-welded automotive structural pillar described in this utility model utilizes a patch plate that is resistance spot welded to a thicker portion of the base plate. This supports a hot stamping process, enabling precise forming of the laser-welded and patched B-pillars. This process increases the local thickness of the B-pillar blank while maintaining the part's localized second base metal thickness, thereby locally strengthening the structural load-bearing capacity and reducing the B-pillar's weight, contributing to energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 A schematic diagram showing the comparison of the base plate and the patch plate according to an embodiment of the present utility model;

[0017] Figure 2 This is a diagram showing the patch plate and substrate in overlapping state according to an embodiment of the present utility model;

[0018] Figure 3 This is the mechanical property test result described in the embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1-patch board; 2-substrate; 3-first parent material; 4-second parent material. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0023] like Figure 1 and Figure 2 As shown, a new type of laser-welded automotive structural pillar includes a base plate and a patch plate. The base plate is connected to each other by laser welding of a first mother material 3 and a second mother material 4. The thickness of the first mother material 3 is greater than that of the second mother material 4. The patch plate 1 is superimposed on the inner side of the base plate 2. The patch plate 1 is superimposed on the first mother material 3, and its end extends toward the second mother material 4.

[0024] A patch plate is resistance spot welded to the thick part of the base plate. This increases the local thickness of the B-pillar blank while maintaining the part's local second base material thickness. This can locally strengthen the structural load-bearing capacity and reduce the B-pillar's weight, contributing to energy conservation and environmental protection.

[0025] like Figure 2 As shown, the base plate is superimposed with a patch plate by resistance spot welding to form an integrated laser-welded B-pillar base material. The laser-welded B-pillar base material formed by welding the patch plate and base plate together by resistance spot welding facilitates subsequent hot stamping processing.

[0026] like Figure 2 As shown, the laser-welded B-pillar substrate is formed into a laser-welded B-pillar for an automobile through hot stamping. Hot stamping is a metal forming process performed at high temperatures that enables precise forming of high-performance laser-welded blanks and patch plate B-pillars.

[0027] like Figure 1 and Figure 2 As shown, the outer contour of the patch plate is consistent with the outer contour of the base plate. The initial contour of the patch plate can be estimated based on the plastic deformation theory, and the geometric shape of the patch plate with preliminary accuracy can be obtained through simulation calculation.

[0028] like Figure 1 As shown, the thickness of the first base material is 2.2 mm, the thickness of the second base material is 1.5 mm, and the thickness of the patch plate is 1.8 mm. The first base material, the second base material, and the patch plate are made of 1500HS-AS material.

[0029] In a preferred embodiment of the present invention, a 1.8mm thick patch plate is resistance spot welded to the 2.2mm thick portion of the base plate. This results in a B-pillar blank with a maximum thickness of 4.0mm and a minimum thickness of 1.5mm. This locally strengthens the structural load-bearing capacity and reduces the weight of the B-pillar, contributing to energy conservation and environmental protection. Furthermore, this structure supports hot stamping processes, enabling precise forming of the laser-welded blank and patch plate B-pillar.

[0030] The mechanical properties of the laser welded automotive structural pillars of this utility model were tested, and the test results are as follows: Figure 3 The test results show that the hot stamping parts have good mechanical properties and meet the requirements of automobile structure.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new type of laser-welded automotive structural pillar, characterized by: It includes a base plate and a patch plate. The base plate is connected to each other by laser welding of a first mother material and a second mother material. The thickness of the first mother material is greater than that of the second mother material. The patch plate is stacked on the inner side of the base plate. The patch plate is stacked on the first mother material, and its end extends toward the second mother material.

2. The novel laser-welded automotive structural pillar according to claim 1 is characterized in that: The base plate is superimposed with a patch plate by resistance spot welding to form an integrated laser-welded B-pillar base material.

3. The novel laser-welded automotive structural pillar according to claim 2 is characterized in that: The laser-welded B-pillar substrate is formed into a laser-welded B-pillar for an automobile by hot stamping.

4. The novel laser-welded automotive structural pillar according to claim 1 is characterized in that: The outer contour of the patch plate is consistent with the outer contour of the base plate.

5. The novel laser-welded automotive structural pillar according to claim 1 is characterized in that: The thickness of the first parent material is 2.2 mm, and the thickness of the second parent material is 1.5 mm.

6. The novel laser-welded automotive structural pillar according to claim 1 is characterized in that: The thickness of the patch plate is 1.8 mm.

7. The novel laser-welded automotive structural pillar according to claim 1 is characterized in that: The first base material, the second base material and the patch plate are made of 1500HS-AS material.

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