Views: 62 Author: Site Editor Publish Time: 2022-03-14 Origin: Site
In the field of industrial machinery where precision is crucial, paper slitting machines are indispensable tools in various industries such as manufacturing and packaging. The outstanding performance of these machines is attributed to a key component – the slitter blade. In this article, we look at the key factors that determine the life and performance of these blades, as well as maintenance tips.
Importance and Application Areas of Slitting Machine Blades
Slitting machine blades serve as indispensable components in various industries, including metalworking, packaging, and more. These high-speed cutting tools undergo a meticulous manufacturing process, featuring stable materials, complete vacuum heat treatment, uniform hardness, and precision machining. Their primary function is to deliver precise, smooth, and wear-resistant cuts, predominantly applied in plate slitting, various slitting units, and production lines within metal sheets, strips, leather, and packaging machinery.
Precision is paramount when it comes to slitting machine blades, necessitating the use of ultra-precision surface grinding machines for flat surfaces, employing specialized grinding techniques, and adhering to stringent quality control standards. These blades find extensive use in large steel manufacturing plants, steel pipe facilities, non-ferrous metal processing plants, and various other industries like packaging, steel processing, and textiles, making them integral to sectors such as papermaking, adhesive tape production, film manufacturing, and telecommunications, among others.
Factors Affecting the Lifespan of Slitting Machine Blades
Knife Sharpening Quality: The longevity and cutting quality of slitting machine blades hinge on the quality of the sharpening process, influenced by factors such as production materials, equipment, process specifications, and the operator's technical proficiency. Higher-quality sharpening translates to prolonged blade life and superior cutting results.
Blades Making Materials: Slitting machine blades consist of a blade body made from low-carbon steel and a blade crafted from high-hardness chromium tungsten-manganese steel, welded using high-temperature methods. The durability of the blade directly correlates with the hardness of the steel used, with high-quality blades boasting a post-quenching hardness ranging from HR55 to HR60.
Blades Shape and Angle: In the context of single-sided A4 paper cutters, single-edged tools are commonly used with sharpening angles typically falling between 19° and 23°. Nevertheless, this conventional sharpening style may not be ideal, as it results in significant wear on the blade's bevel surface. In contrast, double-sided blades offer advantages by reducing machine load and enhancing cutting precision. Smaller sharpening angles result in sharper blades, reduced resistance during cutting, lower wear and power consumption, and a finer end product. However, overly small angles compromise blade strength and wear resistance, leading to reduced cutting speed and quality. Thus, the choice of sharpening angle should balance tool material and the cut object's shearing resistance.
Type of Cutting Material: The speed at which a blade dulls during cutting is influenced by the wear resistance of the material being cut. For instance, when cutting paper, the rate at which the blade dulls is related to the paper's softness, hardness, and ash content. Papers with a tougher texture and higher ash content result in faster blade dulling.
Tips for Slitter Blades Care and Maintenance
Heating Considerations: During blade grinding, heating is essential, but if temperatures exceed 50 degrees Celsius, it's advisable to pause and cool down. Elevated temperatures can compromise the blade's molecular structure and overall accuracy, emphasizing the importance of temperature control.
Grinding Sequence: Begin grinding from flat surfaces to ensure evenness and eliminate gaps, subsequently addressing the sides with attention to smoothness and parallelism. Verify accuracy and smoothness, calibrate the blade and machinery, and conclude with polishing and anti-rust applications to prevent rust and damage.
Polishing Prior to Use: Before employing a slitting machine blade, thorough polishing is crucial. When faced with exceptionally hard and challenging cutting tasks, avoid subjecting the blade to undue force to prevent damage.
Blade Maintenance: Maintain and clean the blade when it's not in use, ensuring the prompt removal of oil stains. Apply lubricating oil to prevent rust, and consider regular polishing with paraffin or soap for effective lubrication.
Avoid Brute Force: Lastly, avoid using excessive force during cutting, as it can lead to blade damage and potential safety hazards. Instead, prioritize blade sharpening to ensure optimal cutting performance.
By comprehending these factors and adhering to proper maintenance practices, you can significantly extend the lifespan and efficiency of your paper slitting machine blades, contributing to consistent, high-quality cutting outcomes. If you have any questions about cutting blades, welcome to contact us.