Stamping die for battery structural part with laser cladding coating

Abstract

A battery structural part stamping die with a laser cladding coating comprises a die body, an alloy layer with an inner layer and an outer layer is arranged on the outer surface of the die body, and the two alloy layers are cladded on the outer surface of a stamping section of the die body in a laser cladding mode. The battery structural part stamping die is ideal in structural design, the alloy layer with the inner layer and the outer layer is adopted, the alloy layer is cladded on the outer surface of the stamping section of the die body in a laser cladding mode, the abrasion resistance strength of the stamping section is greatly improved, and the service life of the battery structural part stamping die is greatly prolonged. The mechanical properties such as hardness, corrosion resistance and fatigue resistance of the outer surface of the stamping section of the stamping die are greatly improved, meanwhile, the method can be used for repairing the stamping die, and the machining cost is greatly saved.

Description

Technical Field

[0001] The utility model relates to a battery structural part stamping die, in particular to a battery structural part stamping die with a laser cladding coating. Background Art

[0002] Power battery structural parts are the core components of new energy vehicles, and the product performance requirements are high. The product materials are generally special low-carbon steel materials with a thin thickness of about 0.25mm-0.5mm. The thinning rate of the product material thickness needs to reach 40%, and after forming and manufacturing, it is required to have high dimensional and wall thickness accuracy, high surface quality, and high physical stability and compressive resistance. Therefore, the performance of the stamping die for manufacturing power battery structural parts is crucial. Existing stamping dies generally use carbide steel or tungsten steel materials, which are processed into precision mold workpieces, punches, etc. through precision lathes, grinders, etc., and then finely polished to obtain the finished mold parts. In order to improve the surface smoothness and wear resistance, a layer of titanium is usually electroplated on the mold surface to improve the product quality. However, the disadvantage of the existing stamping die is that it uses a layer of titanium structure. Since the stamping die needs to operate at high intensity, its life is required to reach hundreds of thousands or even millions of times. However, due to the different forming loads and friction and lubrication conditions, existing stamping dies are inevitably prone to wear, breakage, and even failure. Once the titanium coating is worn, the stamping die cannot be used, and the life of the existing stamping die will be greatly reduced. Utility Model Content

[0003] The utility model provides a battery structural part stamping die with a laser cladding coating, which aims to overcome technical problems such as the existing stamping die structure design is not ideal, the titanium coating is easily worn under high-intensity operation, thereby affecting the service life of the stamping die.

[0004] A battery structural part stamping die with a laser cladding coating comprises a die body, the outer surface of the die body is provided with an inner and outer two-layer alloy layer, and the two alloy layers are clad on the outer surface of the stamping section of the die body by laser cladding.

[0005] Furthermore, the two alloy layers include a first alloy layer and a second alloy layer, and the first alloy layer and the second alloy layer are both composed of a mixture of Fe50 powder, TiC powder and Cr powder.

[0006] Furthermore, the two alloy layers are clad on the outer surface of the stamping section of the mold body by laser cladding equipment, and the laser power of the laser cladding equipment is 3.0-3.2KW, the scanning rate is 1.5-2mm / s, the protective gas flow rate is 5-8L / min, and the overlap rate is 20-30%.

[0007] From the above description of the utility model, it can be seen that compared with the prior art, the advantages of the utility model are: the structural design of the battery structural part stamping die is ideal, and the alloy layer of the inner and outer layers is adopted, and the outer surface of the stamping section of the die body is clad by laser cladding, which greatly improves the wear resistance of the stamping section and greatly improves the service life of the battery structural part stamping die. It also greatly improves the hardness, corrosion resistance, fatigue resistance and other mechanical properties of the outer surface of the stamping section of the stamping die, and can also be used to repair the stamping die, saving a lot of processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the utility model.

[0009] Figure 2 It is a cross-sectional view of the utility model, wherein the dotted box area represents the stamping section area.

[0010] Figure 3 This is a partial enlarged view of point A in the figure. DETAILED DESCRIPTION

[0011] Reference Manual Attached Figure 1 , Figure 2 and Figure 3 A battery structural part stamping die with a laser cladding coating comprises a die body 1, wherein the outer surface of the die body 1 is provided with an inner and outer two-layer alloy layer, and the two-layer alloy layer is clad on the outer surface of the stamping section 10 of the die body 1 by laser cladding. After the laser cladding of the double-layer alloy layer is completed, the outer surface of the die body 1 is cleaned, and then polished by a high-precision curved surface grinder, a surface grinder and other processing equipment, so that the final usable battery structural part stamping die can be obtained.

[0012] Reference Manual Attached Figure 2 and Figure 3 The two alloy layers are clad on the outer surface of the stamping section 10 of the mold body 1 by laser cladding equipment, and the laser power of the laser cladding equipment is 3.0-3.2KW, the scanning rate is 1.5-2mm / s, the protective gas flow rate is 5-8L / min, and the overlap rate is 20-30%.

[0013] Reference Manual Attached Figure 2 and Figure 3The two alloy layers include a first alloy layer 11 and a second alloy layer 12. The first alloy layer 11 is composed of a mixture of Fe50 powder, TiC powder and Cr powder, and the Fe50 powder is 65 parts, the TiC powder is 27 parts, and the Cr powder is 8 parts by weight; the second alloy layer 12 is composed of a mixture of Fe50 powder, TiC powder and Cr powder, and the Fe50 powder is 75 parts, the TiC powder is 20 parts, and the Cr powder is 5 parts by weight. The laser cladding method and steps are as follows: Fe50 powder, TiC powder, Cr powder and other cladding material powders are placed in a coaxial powder feeding device of a laser cladding equipment in sequence and in proportion by mass, wherein the Fe50 powder is 65 parts, the TiC powder is 27 parts, and the Cr powder is 8 parts, to clad the first alloy layer 11; after the cladding of the first alloy layer 11 is completed, titanium carbide, cobalt carbide, and tantalum carbide cladding material powders are placed in a coaxial powder feeding device of a laser cladding equipment in sequence and in proportion by mass, wherein the Fe50 powder is 75 parts, the TiC powder is 20 parts, and the Cr powder is 5 parts, to clad the second alloy layer 12, and finally a stamping die with a double-layer alloy cladding layer is obtained.

[0014] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A battery structural part stamping die with a laser cladding coating, comprising a die body, characterized in that: The outer surface of the mold body is provided with an inner and outer two-layer alloy layer, and the two alloy layers are clad on the outer surface of the stamping section of the mold body by laser cladding; the two alloy layers include a first alloy layer and a second alloy layer.

2. A battery structural component stamping die with a laser cladding coating as claimed in claim 1, characterized in that: The two alloy layers are clad on the outer surface of the stamping section of the mold body by laser cladding equipment, and the laser power of the laser cladding equipment is 3.0-3.2KW, the scanning rate is 1.5-2mm / s, the protective gas flow rate is 5-8L / min, and the overlap rate is 20-30%.

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