砂光机砂带跑偏的自动控制

随着人们生活水平的不断提高,各种装饰家具和地面装修越来越受到人们的青睐.因而各种地板块厂、木制品厂应运而生,遍地开花.同时也加剧了各厂之间的竞争.本制品表面的光洁度直接影响着产品质量,关系到生产厂家的兴衰存亡.木材表面砂光也就成了不可缺少的一环.     

砂光机砂带跑偏的自动控制

随着人们生活水平的不断提高，各种装饰家具和地面装修越来越受到人们的青睐。因而各种地板块厂、木制品厂应运而生，遍地开花。同时也加剧了各厂之间的竞争。本制品表面的光洁度直接影响着产品质量，关系到生产厂家的兴衰存亡。木材表面砂光也就成了不可缺少的一环。     

木材磨削力和影响磨削力的因素

通过试验分析了磨削过程中砂带速度、砂带目数以及木材纹理方向对于磨削力、法向力和磨削过程中功率损耗的影响,研究表明:磨削力均值和砂带速度呈降幂变化规律,法向力均值和砂带速度呈二次幂变化规律,磨削力均值与砂带目数呈线性增加趋势,法向力均值和砂带目数呈二次幂变化规律。功率损耗和砂带速度呈二次幂变化规律,和砂带目数呈线性变化规律。其中顺纹理磨削过程中磨削力、法向力及功率最大,横纹理最小。     

Mexican tropical hardwoods: Seasoning characteristics and recommended drying schedules

Drying characteristics for 43 Mexican tropical hardwoods were developed based on new experimental test results and complemented with known data on density, shrinkage, dimensional stability as well as by botanical and anatomical features. Drying schedules were successfully verified in practical test using semiautomatized kilns.

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Mexikanische tropische Laubh?lzer: Trocknungseigenschaften und Bestimmung von Trocknungspl?nen

Zusammenfassung Anhand (a) der Trocknungszeit, Ri?bildung und Verwerfungen bei der natürlichen Freilufttrocknung, (b) der Ri?bildung, Kollaps und Verschalung beim scharfen Trocknen im Labortrockner bei 103 °C, (c) des stufenweisen Schwindens, (d) des Stehverm?gens und (e) des Vergleichs der Trocknungseigenschaften von bekannten, botanisch und strukturell verwandten Holzarten wurde das Trocknungsgef?lle unter dem Fasers?ttigungspunkt (FSP) und die h?chste zul?ssige Temperatur unterhalb und oberhalb des FSP bestimmt. Diese Daten wurden in praktischen Versuchen verifiziert.

     

木材刷式砂光机砂光参数的选择(2)

以刷式砂轮砂光试验机为砂光设备,以砂轮转速、进给速度、砂光次数为砂光参数,测量砂光参数与表面粗糙度Ra之间的关系,得出了在本实验条件下较理想的砂光条件.     

木材刷式砂光机砂光参数的选择(1)

以刷式砂轮砂光试验机为砂光设备,以树种(樟子松和柞木)、砂纸目数及接触深度为砂光参数,测量砂光参数与被砂木材表面粗糙度Ra之间的关系,得出了在本实验条件下较理想的砂光条件。     

Wet storage for discolouration protection during roundwood storage of three Swedish hardwoods

Discolouration progressing from the end surfaces is a wood quality problem that arises when storing hardwood logs during summer. Wet storage (water sprinkling) is used for protecting stored softwood logs, but experience of wet storing hardwoods is limited. To test the benefit of wet storing hardwoods, logs of Betula pendula/pubescens, Alnus incana/glutinosa, and Populus tremula were wet and dry-stored during 12 summer weeks in southern Sweden to compare the development of discolouration. The discolouration was measured visually during storage in split logs. Wet storage was found to significantly reduce discolouration in the stored logs of all species, with the reduction being most pronounced for birch.     

Research on wear characteristics of abrasive belt and the effect on material removal during sanding of medium density fiberboard (MDF)

European Journal of Wood and Wood Products - Sanding is a key process for the manufacture and application of medium density fiberboard (MDF). In this paper, the wear characteristics of abrasive...     

Emission characteristics of heavy metals and their behavior during coking processes

Besides organic pollutants, coke production generates emissions of toxic heavy metals. However, intensive studies on heavy metal emissions from the coking industry are still very scarce. The current work focuses on assessing the emission characteristics of heavy metals and their behavior during coking. Simultaneous sampling of coal, coke, residues from air pollution control devices (APCD), effluent from coke quenching, and fly ash from different processes before and after APCD has been performed. The total heavy metal concentration in the flue gas from coke pushing (CP) was significantly higher than that from coal charging (CC) and combustion of coke oven gases (CG). Emission factors of heavy metals for CP and CC were 378.692 and 42.783 μg/kg, respectively. During coking, the heavy metals that were contained in the feedstock coal showed different partitioning patterns. For example, Cu, Zn, As, Pb, and Cr were obviously concentrated in the inlet fly ash compared to the coke; among these metals Cu, As, and Cr were concentrated in the outlet fly ash, whereas Zn and Pb were distributed equally between the outlet fly ash and APCD residue. Ni, Co, Cd, Fe, and V were partitioned equally between the inlet fly ash and the coke. Understanding the behavior of heavy metals during coking processes is helpful for the effective control of these heavy metals and the assessment of the potential impact of their emissions on the environment.     

摩擦片圈砂光机的研制

汽车自动变速器的摩擦片圈是传递动力的重要零件,它是由耐磨、耐热、高硬度的材料薄片冲剪成纸圈形状。摩擦片圈轻薄柔软,材料质脆而易折断,且精度要求高。为满足加工要求,研制了专用的砂光设备。本文阐述了专用砂光机的设计要点。     

无磨削最精细的刨加工

在门窗制造和家具制造中通常对刨加工过的可见表面有非常高的要求。在不平稳的纤维方向和交错的位置上轻微的外部撕裂，尤其是硬木，通常在上表面加工后导致令人不满意的结果。采用液压圆柱铣刀能改善质量而无需随后的磨削加工。Oertli开发一种圆柱铣刀用于所有不符合这     

纯棉磨毛床用纺织品印花

阐述宽幅纯棉磨毛床用纺织品的生产工艺,包括前处理、柔软拉幅、磨毛、印前拉幅整纬、印花以及印后整理等;提出了生产中的注意事项,以解决对花难、折皱、拖色、搭色等问题,并减少了磨毛布强度损失,改善了染色牢度.     

Mexican tropical hardwoods — Dimensional stability

q_T , q _R ), (2) swelling coefficients (h _T , h _R ), (3) sorption coefficient (s) and (4) the time to equilibrate between EMC at 80% RH and 65% RH.

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q_T , q _R ), (2) der Quellungskoeffizient (h _T , h _R ), (3) der Sorptionskoeffizient (s) und (4) die Angleichszeit zwischen den Gleichgewichtsfeuchten bei φ = 80% und φ = 65%.

     

木质材料砂带磨削的若干问题

较为详细地介绍了砂带磨削的基本原理及其工艺特点,并分析了木质材料砂带磨削中的几个技术问题,指出了木质材料砂带磨削的发展方向。     

木工砂光机的品种和发展趋势

砂光机是利用磨料砂光木材表面的机床。砂光机在人造板和家具行业中使用面广,需要量大,品种较多,近年来发展速度较快。 砂光机的类型和品种很多,从广义上讲,砂光机包括窄带式砂光机(工作台固定或滑动);全自动带式砂光机,宽带砂光机(带宽600mm以上);盘式砂光机;辊式砂光机;轴式砂光机;手提式砂光机;专用     

涂料染色纱线色织磨毛休闲面料的开发实践

涂料染色适合于各种纤维,但目前国内涂料局限于印花、织物染色,较少用于色织物的纱线染色。文章介绍了涂料染色纱线色织面料的开发实践,叙述了各道工序的具体工艺和影响质量的主要因素,由此拓宽了涂料应用范围,丰富了色织物品种,还可通过磨毛改善涂料染色织物手感僵硬的缺点。     

谈砂光机砂带跑偏的自动控制

1 国内砂光机市场简况 我国目前使用的砂光机大体分简易和高档的两种。简易的砂光机一般结构简单,砂光质量低,生产效率不高,砂带易跑偏,使用寿命短。另一种使用较多的是高档的砂光机。这类砂光机由于采用了光电控制装置,自动化程度高,砂光质量好,生产效率和砂带使用寿命都有很大的提高,因此受到了用户的广泛欢迎。但由于其价格昂贵,应用受到了限制。