Manhart How to evaluate the welding quality of a handheld laser welding machine?

Evaluating the welding quality of a handheld laser welding machine is a comprehensive process that involves multiple considerations. Here are some main evaluation methods and steps:
###1、 Assessment of weld appearance quality
1. Weld seam shape: Check whether the shape of the weld seam is regular, including whether the contour, width, and height of the weld seam are consistent, and whether there is any obvious distortion or deformation.
2. * * Weld Depth * *: Measure whether the depth of the weld meets the requirements to ensure that the penetration of the weld meets the preset standards.
3. * * Surface Defects of Weld Seam * *: Observe whether there are cracks, pores, inclusions, and other defects on the surface of the weld seam. These defects will seriously affect the strength and sealing of the welded joint.
4. Visual inspection: Based on the experience and visual observation of workers, preliminarily determine whether the appearance quality of the weld meets the standards.
###2、 Strength assessment of welded joints
1. * * Tensile test * *: Conduct a tensile test on the welded joint to measure whether its fracture strength meets the design requirements. Tensile testing can evaluate the overall strength and toughness of welded joints.
2. * * Shear test * *: Evaluate the performance of welded joints under shear force through shear tests to determine whether they can meet actual usage requirements.
3. * * Bending test * *: Conduct a bending test on the welded joint to observe its deformation and whether cracks appear during the bending process, in order to evaluate its plastic deformation ability and fatigue resistance.
###3、 Quality assessment of heat affected zone
1. Observation of the heat affected zone: Check for defects such as cracks and softening zones in the heat affected zone. These defects will affect the overall performance and service life of the welded joint.
2. * * Metallographic structure analysis * *: Analyze the metallographic structure of the heat affected zone, observe its grain size, morphology, distribution, and other characteristics to evaluate the degree of heat affected during the welding process and the changes in material properties.
3. Microhardness testing: Evaluate the hardness changes in the heat affected zone through microhardness testing to understand the impact of thermal effects on material hardness during welding.
###4、 Other evaluation methods
1. * * Destructive inspection * *: For critical components or important welds, destructive inspection can be performed, such as tearing off the welding base material for confirmation, to obtain more accurate welding quality information.
2. Welding parameter recording: Record key parameters during the welding process, such as laser power, welding speed, wire feeding speed, etc., for subsequent analysis and optimization of the welding process.
3. * * Customer Feedback * *: Collect customer feedback on welding products, understand the performance of welding quality in actual use, and continuously improve based on feedback.
###Precautions
1. * * Choose the appropriate evaluation method * *: Select the appropriate evaluation method and standards based on the specific requirements and usage environment of the welded product.
2. * * Strictly adhere to relevant standards and specifications * *: During the evaluation process, it is necessary to strictly comply with relevant national standards, industry standards, and product specifications to ensure the accuracy and reliability of the evaluation results.
3. * * Comprehensive evaluation * *: The evaluation of welding quality is a comprehensive process that requires comprehensive consideration of multiple factors such as the appearance quality of the weld seam, the strength of the welded joint, and the quality of the heat affected zone.
Through the above methods and steps, the welding quality of handheld laser welding machines can be comprehensively and accurately evaluated, providing strong support for product quality control and process improvement.