中文摘要
木材切削加工是能耗低而效率高的木材工中应用最广泛的生产方式。其薄木的切削加工中一般采用木方的刨切方法。方材的刨切法,原木的利用率低而工序多。优质森林的减少而原木直径的变小及贵重树木的减少,也对刨切技术带来了挑战。因此本项目中首次提出,利用木材剪切应力的切削力公式中计算得到的切削力和用切削力传感器测到的切削力的平衡条件来控制切屑形态,找出不发生超前劈裂的流线型切屑的条件,进一步解决切削厚度和切削宽度的变化对薄木质量的影响,建立把圆木旋切成一定规格尺寸的微薄木的理论与技术。即,使用改装的车削床,无压尺的条件下进行薄木切削试验,用切削力传感器及激光变位仪来测定切削中的切削力和已加工表面性能,从而建立动态下的试验数据采集系统。通过试验数据分析,解决薄木切削厚度,刀具参数,原木被切削性质改善等试验参数对表面质量的影响。从而建立新的微薄木旋切理论与技术,提高原木出板率及木材资源的高效利用做出贡献。
英文摘要
The wood cutting was a means of production that low power consumption and high efficiency. The decorative veneer processing was a kind of wood cutting, generally using the slicing method of Lumber. But this method lacked in utilization of logs and needed multi-process. Beyond that,because of the reducing quality of forests and the smaller of diameter of the logs,the method confronted technical challenge. This project was first proposed, using the conditions that wood shear stress and cutting force had to be balance to control the chips type, than found out a flow type chip conditions, to further explained the effect of cutting thickness and cutting width in veneer quality, and the technology that cutting the logs into a decorative veneer of a certain size and specifications. That is, using the modified a lathe, the veneer cutting experiments carried out under the no pressure bar, using the tool dynamometer and laser displacement sensor measure to the cutting forces and the machined surface. Thereby established the collection systems of experimental dynamic data.Through the analysis of experimental data, to solve the effect thickness of the veneer in the quality of cutting surface. Using the methods that improved performance of wood by be cut and adjust the tool parameters, we would obtain the best technological parameters of veneer cutting process, ultimately, achieved the target that to improve out of the board rate of the logs and highly effective use of the resources.
