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ID:55338836
大小:3.79 MB
页数:53页
时间:2020-05-14
《胶合板制造工艺学-3新方案.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、第三章单板的制造Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.§3-1单板旋切及旋切角度参数一、旋切的概念Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.
2、0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.二、旋切主要角度参数旋刀研磨角:是旋刀前面和后面之间的夹角。后角:是旋刀的后面与旋刀刀刃与木段相接触表面的切线CP之间的夹角。切削角:是切线CP与旋刀前面之间的夹角。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright
3、2004-2011AsposePtyLtd.图3-2旋切机的齿形卡盘Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.旋切后卡盘在竹材端面留下的齿形痕迹Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.采用胀轴的竹材旋切机长、短、直径不同的胀轴Evaluationonly.Createdwi
4、thAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.图4-1无纺布强化和齿形接长竹单板Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.旋切用的竹筒和旋切后的竹芯Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011As
5、posePtyLtd.竹单板干燥机Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.§3-2单板的质量单板质量一般从以下四方面考虑:单板厚度的偏差;单板背面裂隙率;单板表面粗糙度;单板横纹抗弯强度。在这四项中,以前两项为主,因为单板背面裂隙越多、越深,则表面粗糙度就越差,抗弯强度也就越低,因此,实际上只要根据前两项就可以评定单板质量的好坏。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5Cl
6、ientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.一、单板的厚度偏差1测量方法:检查单板的厚度偏差应检查两方面:① 检查整幅单板的厚度偏差;② 检查一根木段旋切下来的单板厚度偏差2.鉴定单板厚度均匀性的指标:① 实际平均厚度和名义厚度的差值② 单板各处的实际厚度不均匀情况σ。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.树种单板厚度(mm)1.00-2.002.20-3.754.00以上
7、允许偏差(mm)椴木±0.05±0.10±0.20柳安±0.05±0.10水曲柳±0.10±0.15表 一般工厂规定的单板厚度偏差允许范围Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.例 某厂旋切椴木单板的名义厚度为1.00mm,为检测其厚度偏差,在开始旋切时从木段
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