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双刃芽接刀常用于果树(特别是核桃)嫁接中的方块芽接或套芽接,是一种高效率的刀具。然而,以往的双刃芽接刀是用两片刀片固定在两块木块上,不仅使用不方便,而且刀片不易加工。这是因为,在嫁接中随着接穗和砧木的变化,需要两刀片之间不同的宽度,这就需要事先准备好不同大小的木块作替换,或者带上许多把不同规格的刀;再则,由于刀体较大,刀锋外露,故不便于携 相似文献
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何家林 《林业机械与木工设备》2014,(12)
对螺旋叶片刀盘散包粗碎机的粗碎器进行分析，利用SolidEdge软件建立散包粗碎器刀片的三维模型，采用ANSYS软件对刀片进行结构静力学有限元分析。结果表明：刀片设计合理，强度满足要求。 相似文献
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去竹隔是竹胶合板、竹平板及竹层压板生产必不可少的工序。所设计的半圆竹块去竹隔机中的双摆三组合叶片式刀轮由叶片刀轮、摆动刀片组成，其采用液压比例技术控制摆动刀片摆动。该机适应竹材特性，可连续、自动去除竹隔，劳动强度低，生产效率高。 相似文献
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由昭平县松脂办、县林业局、县松脂厂三家联合研制的GXZP92-6-1型高效采脂刀,最近通过了自治区科委组织的技术鉴定。 GXZP92-6-1型高效采脂刀由割脂刀片、定位 相似文献
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俞建英 《林业机械与木工设备》1983,(1)
FS—3型幼林抚育松土机是一种小型手扶式旋耕松土除草机械,它的工作头旋耕刀既是耕作部件,又是作业时的行走机构,由操作手通过手柄上提或下压支承脚尖杆,控制机组前进速度,使之低于刀轴回转线速度,从而实现旋耕松土除草。松土机刀片在除草松土过程中,由于切削、破碎机和抛掷土壤,产生土壤切削阻力。又由于耕深、耕速、土壤比阻、刀片 相似文献
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金刚石刀具在木材加工中的应用 总被引：2，自引：0，他引：2
本文概述了金刚石复合刀片的发展、种类和性能，详细介绍了金刚石刀具在木材加工中的应用，如裁板锯的金刚石圈锯片、双端铣用粉碎刀、封边机用修圈刀，及在强化木地板加工中的应用。 相似文献
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加热适张度是利用氧一乙炔焰,将锯身的一定部位加热,使该部在冷却收缩中产生同辊压张力一样的变形,从而获得适张度。圆锯片气焊加热适张度机配有带锯夹锯装置,可用于圆、带锯的加热适张度及辊压处理,实现了一机多用。经该机修整的锯片,具有作业时间短、适张度均匀且不易消失,锯末端加热部分不易变形,厚度均匀,锯切质量高等优点。 相似文献
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In this paper, a 2-D and 3-D finite element model of roll tensioning process of circular saw blade were established by Static/General module of ABAQUS software based on finite element method. The rolling force and tensioning stress distribution of circular saw blade were calculated by these two models which were proved to be true and reliable. The effects of yield strength of circular saw blade on tensioning stress distribution and rolling force were studied. The research achievements showed that a circular saw blade made with high yield strength obtained a higher tangential compressive stress and radial compressive stress in the rolled region during roll tensioning process, which has both advantages and disadvantages for the stability of the saw blade. Besides, a circular saw blade made with high yield strength also put forward higher requirements for roll tensioning equipment because of the large rolling force during roll tensioning process. 相似文献
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Summary The band saw blade vibration under non-moving and moving conditions has been experimentally studied for band saw blades unfitted with saw tension and back crown, fitted only with saw tension, and only with back crown. The lateral natural frequency of a band saw blade was found to decrease by fitting saw tension in a saw blade, but there was little or no effect for blades having only back crown. The torsional natural frequency of a band saw blade increased by fitting saw tension in a saw blade, but again there was little or no effect of fitting back crown in a blade. The lateral natural frequency decreased by tilting the upper wheel for the band saw blades investigated. On the contrary, when the upper wheel was tilted the torsional natural frequency increased for an untensioned blade with no back crown, and blades fitted only with back crown, however, there was little or no effect for a band saw blade fitted only with tension. The lateral and torsional natural frequencies significantly affected the over all self-excited displacement vibration of band saw blades. However, the displacement vibration due to the frequency of the number of wheel rotation affected significantly the over all self-excited displacement vibration of a band saw blade fitted with excessive back crown.The authors wish to express their appreciation to Dr. F. E. Dickinson, Univ. of California, Berkeley, Calif., for an excellent job of revising the grammar and his valuable suggestions. This investigation was supported in part by Grants in Aid for Scientific Research from the Ministry of Education, JapanMembers of the Faculty of Forestry, Shimane Univ., Matsue, JapanMember of Shimane Prefecture Forestry Experiment Station, Shimane, Japan 相似文献
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利用三维坐标仪 ,对一空间叶片进行了定位测量 ,计算出各截面的主要参数 ,根据叶片的受力特点 ,对叶片进行强度校核 ,并对结果进行了理论分析 相似文献
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Summary This paper investigates a method for slicing thick pieces of wood across the grain using a sharp steel knife, and it demonstrates the effectiveness of the knife slicing process at an experimental level. In order to highlight the key parameters facilitating or hindering the thick slicing process, several factors affecting the cutting forces and the cut surface quality have been studied; the blade geometry, the effect of friction, the cutting speed, the boundary load constraints and the wood moisture content. The results indicate that a large proportion of the cutting force may be related to the wedging action of the blade in the wood. Therefore, significant reductions in the cutting energy can be achieved by optimising the blade shape. A simple homogeneous strain model has been developed which quantifies the cutting forces in terms of the blade angle and the blade surface friction. The results from this theoretical model are compared with the experimental findings and discussed in relation to methods for improving the cutting technique.This work was funded by the Foundation for Research Science and Technology. This support is gratefully acknowledged 相似文献
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通过优选确立2年生油橄榄弗奥叶片中黄酮的最佳振荡加热提取条件，以其总黄酮含量为指标，用正交分析法对叶片细度、提取时间、提取剂乙醇的浓度3个因素对试验结果的显著性进行分析，优选研究得到叶片细度对该方法提取黄酮影响不显著，而提取时间和乙醇浓度都较显著最佳提取时间为6h，提取剂乙醇的最佳浓度为75％。结果表明油橄榄叶片中黄酮的最佳振荡加热提取工艺为A1B1C1，即叶片细度为100目、提取时间为6h、乙醇浓度为75％。 相似文献
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带锯机锯轮转速、锯条摆动与锯解精度的试验研究 总被引：2，自引：0，他引：2
基于对木工带锯机加工特性的研究需要,本文在MJ397型高速木工带锯机的锯条张紧力和进给速度恒定的情况下,通过实测锯机工作台和锯条结构系统的固有频率、同条件下锯割杉木试材时的锯条横向摆动量、变频器调节锯轮转速和锯材表面粗糙度等,分析锯轮转速、锯条横向摆动量与锯解精度的关系,为优化国产带锯机锯割稳定性等设计工作提供依据. 相似文献
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就65Mn钢圆锯片基片淬火过程中残余应力的分布特点进行了实验研究,结果表明:经淬火后基片径/切向残余应力主要呈拉应力状态,其中水淬造成较大的残余拉应力,切向拉应力过大是造成基片开裂、变形的主要原因.油淬的残余拉应力较小,生产中若采用油或类似的冷速进行淬火,就能较好的控制淬火质量,为回火和平整等后续工艺奠定基础. 相似文献