共查询到19条相似文献，搜索用时 250 毫秒
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研究了锯身开有细缝的硬质合金圆锯片。对比试验表明，细缝硬质合金圆锯片较常规硬质合金圆锯片的优点是：空转偏摆小、高频固有频率数量少，吸振效果好，噪声低。 相似文献
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硬质合金圆锯片设计及制造工艺的发展 总被引：1，自引：0，他引：1
邱大伟 《林业机械与木工设备》2003,31(7):12-13
圆锯片在木材加工行业中有着广泛的用途,尤其是硬质合金圆锯片,由于其具有优良的切割精度及较高的耐用度,短短的几年在木材加工中已普遍使用,目前已取代了大部分传统的木工圆锯片。近年来,硬质合金圆锯片的设计及制造工艺有了很大的改进,正向提高锯切精度、降低生产成本、大批量规模化生产方面发展。1硬质合金圆锯片设计的发展1.1锯片材质的研究圆锯片切割过程属断续切削,因此不可避免地发生振动,影响被切表面质量,并产生噪声。人们为了降低其危害,一直在努力通过改变锯片材质的方法,降低或抑制锯片工作过程中的振动。这些方法主要包括增加… 相似文献
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《林业机械与木工设备》1993,(4)
山西省太行锯条厂研制成功一种特种硬质合金刨锯片.它通过改变现有硬质合金圆锯片的结构,可提高切割寿命和切削精度,扩大了使用范围;它的特征在于硬质合金创锯片的锯体上冲出刨刀槽.在 相似文献
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2005年全国木工刀具生产及应用技术研讨会暨中国林业机械协会林业工具与木工刀具专业委员会年会于2005年11月13日至14日在南京召开。来自全国林业高校、科研设计单位以及中外企业的140余名代表参加了这次会议。会议的主要议题是：圆锯片动态特性及振动控制；圆锯片噪声分析及控制；硬质合金圆锯片修磨设备及技术；硬质合金圆锯片设计制造；硬质合金圆锯片齿形、角度及应用；木工超硬刀具材料合理选择；木地板刀具设计与应用；硬质合金锯齿焊接技术；聚晶金刚石刀具制造与修磨；家具刀具设计与应用。由于这次会议的主要议题是林木工刀具生产和应用技术,与会代表反应强烈,会议取得圆满成功。 相似文献
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介绍了木工硬质舍金镶焊齿圆锯片的刃磨技术,包括硬质合金镶焊锯齿刃磨砂轮参数和刃磨工艺参数的选用,以及硬质合金镶焊锯齿锯片外径、低碳钢齿背、后齿面、前齿面和槽齿的刃磨方法. 相似文献
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文章在分析讨论了影响圆锯片极限转速的一些重要因素后认为 ,包括锯片材料、结构、尺寸、内应力影响的最低共振临界转速是制约锯片极限转速的重要因素 .考虑到诸多影响因素后 ,文章建议圆锯片的最高极限转速以不超过该锯片未适张时的最低临界转速的 50 %～ 6 0 %较为适宜 相似文献
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【目的】分析锯齿侧刃参数对锯切表面粗糙度的影响,通过优化锯齿侧刃参数,解决圆锯锯切时进给速度提高与表面粗糙度增大之间的矛盾,为新型木工圆锯片设计提供参考和指导。【方法】提出微量零径向侧后角锯齿的概念,使用9种不同锯齿侧刃参数的圆锯片,以水曲柳和高密度纤维板为对象进行锯切试验,研究不同进给速度下径向侧后角和零径向侧后角段对锯切表面粗糙度的影响。【结果】随着进给速度增加,锯切表面粗糙度增大,径向侧后角减小,锯切表面粗糙度降低,无零径向侧后角段锯齿锯切形成的表面粗糙度均高于具有零径向侧后角段锯齿,特别是当零径向侧后角段由0 mm增加到0.5 mm时,锯切表面粗糙度下降最为明显。当零径向侧后角段大于0.5 mm时,侧刃的零径向侧后角段具有"以锯代刨"的作用,与零径向侧后角锯齿相比同样可起到改善锯切表面质量的作用。【结论】锯切表面粗糙度一定程度上取决于锯痕深度。在实际锯切过程中,仅有长度近似等于每齿进给量的锯齿侧刃部分参与切削,占侧刃总长度的很小一部分,微量零径向侧后角锯齿中零径向侧后角段长度比每齿进给量略大且越接近每齿进给量越理想。具有微量零径向侧后角段锯齿的圆锯片与零径向侧后角锯齿相比,同样可起到改善锯切表面质量的作用;在保持其他切削参数不变的情况下,微量零径向侧后角段锯齿还可以减小锯齿侧刃与锯路壁之间的摩擦。 相似文献
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The sound pressure level of differently designed circular saw blades were investigated during idling. Nine blade samples were used: three differently designed blade bodies (without slots, with four radial slots, and with four slots with copper cork), each with three diameters (260,280, and 300 mm). The sound pressure level was measured at different rotational frequencies ranging from 25 to 65 rps in increments of 1 rps. Rubber damping rings 80mm in diameter and 0.3 mm thick were placed between the saw blade and the collars, and the emitted noise was measured. Because of the whistling sound the blades without slots emitted high sound pressure levels. There were no significant changes when rubber damping rings were used. The use of rubber damping rings on the samples with radial slots eliminates the whistling noise. The saws with copper corks did not emit a whistling noise at all, and their aerodynamic noise was 2–3 dB (A) lower than the aerodynamic noise of the saws with radial slots. The relation between sound pressure emitted by the damped idling saw and peripheral velocity can be described by the power function with the exponent value between 4.8 and 5.2.Part of this report was presented at the 14th International Wood Machining Seminar, Epinal, France, September 1999 相似文献
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The natural frequencies, aerodynamic noise, whistling noise, and self-excited vibration between the common circular saw with uniform thickness and the circular saw with step thickness (thin on its outer part and thick on its inner part) were researched during idling. The natural frequencies of the circular saw with step thickness increased with an increase in the thickness and in the radius of the thick part. The frequencies of the circular saws with step thickness (thick at the inner part) were higher than that of the thin circular saw with a uniform thickness of 0.5mm. The aerodynamic sound pressure level induced from circular saw teeth increased with an increase in the tooth thickness. The whistling noise and self-excited vibration easily occurred in the thick circular saws (1.5, 2.0, and 2.5mm). The whistling sound pressure level and the vibration amplitude increased with an increase in the thickness of the saw. None of the designed circular saws with step thickness generated whistling noises or self-excited vibration during idling.Part of this report was presented at the 45th annual meeting of the Japan Wood Research Society at Tokyo, April 1995 and the 12th International Wood Machining Seminar at Kyoto, October 1995 相似文献
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Circular saw construction using materials with high internal damping has been found to be an effective way to suppress whistling noise during saw idling. A high-damping alloy called Silentalloy (12Cr-3Al-Fe) was previously shown to be an effective material for this purpose. Tests with Silentalloy suggested that a logarithmic decrement of at least 0.07 is needed. Silentalloy does have some disadvantages, such as modest strength, difficult heat treatability, and special order status. The purpose of these experiments was to confirm the general applicability of the minimum effective logarithmic decrement of 0.07 and to find more practical metals for saw-blade construction. Three commercially available metals of different damping capacity were selected. The idling noises of saws made of these metals were compared with those of saws made of typical saw steel and Silentalloy. The minimum logarithmic decrement for whistling-noise suppression was found to be approximately 0.01. On a logarithmic scale, this value is similar to the 0.07 value previously found for a Silentalloy saw. A ferromagnetic steel (20Cr-3A1-Fe) was found to be a useful alternative to Silentalloy from the viewpoint of strength, but the cost of this steel makes it unsuitable for mass production. The success in identifying an effective alternative material to Silentalloy provides encouragement for the identification of other high-damping alloys among the 13Cr-Fe to 18Cr-Fe series without the cost disadvantage of ferromagnetic steel. 相似文献
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According to ZBJ65015-89 standard about noise level testing method of woodworking toot, the noise testing for MJg0# and MJCl125 precision panel saws was conducted by using model ND2 precision soundqevel apparatus and double frequency wave filter. The testing results showed that the unloaded running noise source of precision panel saw was mainly from main saw blade and its aeromechanic noise was the largest. The rotating speed was determined as an important factor to impact dynamic characters of precision panel saw as the unloaded running noise increased along with speed increasing. For reducing noise of precision panel saw, the first important way is to reduce the aeromechanic noise produced by main saw blade rotating at high speed; based on assuring the processing precision, choosing tow speed is a better way to drop dawn noise; from the view of design, the diameter of clamping lid is better of half of outer diameter of main saw blade. 相似文献
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小型割草机是庭院绿化作业中的常用设备，但因工作时噪声大，严重影响了人们的工作、学习与生活。通过在实验室内进行空转噪声测试实验，获得了大量的实验数据，并通过噪声频谱分析归纳其声源发声规律和噪声控制的频率范围，确定割草机的主要噪声是由发动机排气脉动气流和刀片旋转空气动力气流所引起。该实验分析结果为进一步实施割草机噪声控制奠定了基础。 相似文献
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文章论述了一种圆锯片适张状态的检测方法及实现的系统 .该方法采用锯片适张前后固有频率的变化幅度 ,锯片单点加载情况下一定半径圆周上的横向变形量和端面圆跳动三个特征参量 ,表述一个锯片的适张程度、适张均匀性和平整性 .应用计算机控制的检测系统 ,经过对大量不同规格木工锯片和大型金刚石锯片的检测 ,结果表明该方法是切实可行的 相似文献
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只有搞清油锯的振动特性,找出油锯振动的根源并掌握其振动规律,才能有的放矢地制订出减振方案并为新型低振动油锯的研制打下良好的理论基础。一、研究对象和测试仪器研究对象和测试样机,选取西北林机厂生产的GJ-85型油锯,柳州机械厂的051型油锯和苏联的урал-2型油锯。样机皆经磨合和试运转。测试仪器选用YD-8型和YD-1型压电式加速度传感器。前者频率范围2-18KHZ, 相似文献
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精密推合锯动态特性的研究──噪声测量与分析 总被引：1，自引：0，他引：1
通过对牡丹江木工机械厂生产的ＭＪＣ１１２５精密推台锯的测试,找到了该类型机床的主要噪声源,并得出了空运转时随着转速提高噪声也提高的变化规律。 相似文献
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裁板锯偏转机构运动关系的反求设计与仿真 总被引：1，自引：1，他引：0
针对裁板锯锯片偏转系统运动关系复杂不易于单片机编程的问题,提出了应用反求设计开发模式求出连杆与丝杠系统的伸长量X和与之对应锯片偏转角度θ之间的函数关系。从采用Lagrange插值仿真得到的系统仿真曲线可知,四次多项式传递函数可以满足运动关系的精度要求,采用Matlab仿真最终确定二者之间的关系为一次函数。通过实验得出当偏转角为10°和35°时计算得到的直线误差最小,据此设计的裁板锯MJ6130Z已经批量生产。Abstract： In view of the problem that complicated motion relationship of the blade deflection system of board cutting saws makes MPU programming difficult,the function relation between the extension volume of the connecting rod and screw rod system and the correspo 相似文献