Effects of slots on the lateral vibration of a circular saw blade

✍ Scribed by Satoru Nishio; Etsuo Marui

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 991 KB
• Volume: 36
• Category: Article
• ISSN: 0890-6955
• DOI: 10.1016/0890-6955(95)00088-7

✦ Synopsis

In the majority of cases, wood is cut at a high feed rate and high rotational speed by circular saw blades with tungsten carbide tips brazed on the periphery of metal circular plates. Slots are made at several places from the periphery towards the center of a saw blade to prevent lateral vibration, both in idling and cutting, and to prevent a drop in critical rotational speed caused by heat expansion on the blade periphery during the cutting operation. In this paper, variations of lateral vibration mode, natural frequency and critical rotational speed of a slotted circular saw blade are investigated experimentally and by numerical calculations. The lateral deflection of a circular saw blade at the critical rotational speed and at the rotational speed near it is examined by a timber-cutting experiment.