INVESTIGATION OF LASER TEXTURING PARAMETERS AND THEIR IMPACT ON GLUE ADHESION PROPERTIES ON THE SURFACE OF BIRCH PLYWOOD

Laser technologies are wide-ranging applications in various fields such as manufacturing, medicine, research, entertainment, and more. They are used in processes, such as, for cutting, welding, marking, engraving, surgery, spectroscopy, and many other purposes, owing to their precision, versatility and etc. Birch plywood is a type of manufactured wood product made from thin layers of birch veneer bonded together with special glue under high pressure and heat. It is known for its strength, stability, and visual look, making it a popular material in woodworking, furniture making, construction, and other applications. This study investigates the effect of laser textured treatment on the adhesion properties of birch plywood surface using PVA wood glue. A SUNTOP ST-CC9060 CO2 laser with a wavelength of 10640 nm was used to texture birch plywood samples with different power and speed parameters, including untreated samples (base). Dino-Lite Edge AM7115MZT digital microscope, and an OLYMPUS LEXT OLS5000 laser microscope were used to measure the samples. The depth and width of the treated area were measured for these samples and graphs were created to analyze the results. Material testing machine Zwick / Roell Z150 was used for tensile and shear analysis of the processed samples. These results show that laser-treated samples have an effect on glue adhesion compared to untreated samples. The study provides valuable insight into the optimization of laser processing parameters in adhesion, and also shows the potential of this type of adhesion to improve the quality of the adhesion properties of laser-treated birch plywood.

MICROSTRUCTURING IN PLATINUM AND STAINLESS STEEL MATERIAL USING PICOSECOND Nd:YAG LASER

The number of products manufactured in micro- and nano-size is increasing every year. In electronics, medicine, biology and other industries, because of the rapid development of technologies, is possible to produce new or already used products in very small sizes, maintaining or even improving the efficiency of the product or giving an opportunity to use them for new purposes. Currently available pico- and femtosecond lasers ensure the production of such products in very small sizes. In this study, the treatment of platinum and stainless steel using a picosecond Nd:YAG laser with a wavelength of 1064nm, was considered. The obtained results for the laser ablation process of these materials will be useful for further research in the field of laser microprocessing

OPTIMIZATION OF CO2, FIBER AND DIODE LASER PARAMETERS FOR MARKING AND CUTTING THE CORK

Nowadays, lasers are trying to use as many different industries and processes as possible due to their characteristics. One of the main uses of lasers is the cutting and marking of materials. The most common laser processed materials is wood and metal. Cork is one of the safest and easiest materials to process with laser but compared to wood and metal it is more difficult to predict the end result due to this material non-homogeneity. This study is explored natural cork processing and set optimal parameters to get the best results for cutting and marking with lasers. The essence of the research is to prove that it is possible to get good results in cork laser treatment and that there is a prospect of future processing of cork and similar materials with laser devices. There was made 1260 measurements of laser processing on cork, data was collected and graphs plotted and analysis of collected data was made as well

INVESTIGATING THE CONTRAST OF SURFACE MARKING ON DIFFERENT COLOR CONNECTORS FOR TELECOMMUNICATIONS NEEDS

The development of marking technologies for telecommunications connectors requires increasingly detailed information about their applications. One solution is to use QR codes that contain sufficient information about the connectors' applications. Accurate marking of connectors requires a precise marking system, such as a laser marking system. In this study, a Rofin PowerLine F20 Varia fiber laser was used to mark four different types of ABS plastic connectors in various colors. To achieve optimal marking for all four colors, three experiments were conducted to achieve contrasting marking and high roughness. Easy QR code reading was achieved with an average marking power of 3 W to 4.2 W, a laser marking speed of 300 mm/s to 500 mm/s, and a scanning frequency of 50 kHz to 70 kHz at a constant pulse duration of 8 ns and raster spacing of 50 µm. The microstructural changes and change in roughness were determined using a laser scanning microscope (Olympus OLS5000), which revealed structural changes on the surface and an increase in relative roughness from 39% to 76%. This experiment shows that different parameters of the laser marking mode are required for each color

INVESTIGATION OF LASER MARKING AND TEXTURING OF TITANIUM GR 2 WITH FIBER LASER

Titanium Gr 2 is widely used in engineering and medicine due to its excellent mechanical and corrosion-resistant properties. Laser marking is a crucial process for many applications that require high-contrast, durable markings. In this study, we used a Rofin PowerLine F 20 Varia fiber laser to mark titanium Gr 2 with a 6x6 matrix of 5x5 mm squares. We varied the speed (100-1100 mm/s), power (8-18 W), and frequency (100 and 500 kHz) of the laser marking process to investigate their effects on the surface roughness and contrast of the markings. We analyzed the markings using a laser scanning microscope and Adobe Photoshop software. Our results show that the contrast and roughness of the markings were influenced by the frequency, scanning speed, and power. High marking speeds produced lighter markings, while low marking speeds produced darker markings. We also found that the surface roughness increased with higher frequency and powers. Our findings provide valuable insights into the optimal laser marking parameters for titanium Gr 2, which can enhance its performance and durability in various applications

INVESTIGATING THE IMPACT OF LASER POWER AND SCAN SPEED ON ENGRAVING ASPEN THERMOWOOD

This study examines the effect of pre-heat treatment on laser engraving of aspen thermowood. We used an infrared CO2 laser with a wavelength of 10640 nm to engrave aspen thermowood samples with different pre-treatment temperatures, including one non-treated sample (base). The samples had a similar moisture content of about 6 - 8%, but exhibited different shades of brown depending on the pre-treatment temperature. The engraving depth and width were measured for each sample, and 8 graphs were constructed to analyze the results. Our findings show that pre-treatment temperature has a significant effect on the efficiency of laser engraving, with higher pre-treatment temperatures resulting in deeper engraving lines. The study provides valuable insights into the optimization of laser engraving parameters for aspen thermowood, and demonstrates the potential of pre-heat treatment to improve the quality of laser-engraved wooden products.

LASER ABLATION OF PAINT COATINGS IN INDUSTRY

A comparison is made between the laser and sandblasting methods for removing paint from industrial facilities. The advantages of laser ablation are discussed. The possibilities of laser paint removal systems - stationary and moving - are shown. The main factors influencing the laser ablation process and the indicators that determine the quality of the obtained surface are systematized. Researchers' publications on this technological process are analyzed

INFLUENCE OF LASER PARAMETERS ON THE PROCESSING OF ACRYLIC

The publication describes the obtained results of the depth and width of the engraving line and cutting line when processing materials such as acrylic. In the experiment, we used a SUNTOP ST-CC9060 CO2 laser and an OLYMPUS OLS5000 laser microscope. The aim of the experiment was to find parameters for optimal cutting and many parameters for different engraving depths

LATGALES CERAMIC ENGRAVING WITH CO2 LASER

The paper discusses the need for a more accurate understanding of the results for certain laser parameters when engraving a material such as ceramics. For engraving the SUNTOP ST-CC9060 CO2 laser system was used and for measuring the OLYMPUS OLS5000 laser microscope was used. The objective of the experiments was to determine how engraving depends on the laser power and scanning speed

OPTIMIZATION OF PARAMETERS FOR LASER MARKING AND ENGRAVING ON PLYWOOD AND PINE WOOD MATERIALS

This publication shows the results of CO2 laser marking and engraving on plywood and pine materials at different speeds and powers. Plywood and pine materials were marked and engraved with four different speed and seven different power ratios. Marked and engraved line depth was measured for these materials. In this publication used SUNTOP CC-9060 CO2 laser machine and OLYMPUS OLS5000 laser microscope