氯化钾镀锌(续)

14.氯化钾镀锌溶液如何维护槽液的日常正确维护是非常重要的,它是电镀质量的保证.氯化钾镀锌溶液很稳定,比较好维护.注意下列几点,一般槽液不易出故障. 1.光亮剂要勤加少加.滚镀锌时最好每缸加,在起缸前15分钟加入,以CZ——87型高温氯化物光亮剂为例,如电镀时间每     

两次锌酸盐镀锌故障的分析

我厂滚挂镀锌都是采用ＤＥ型锌酸盐镀锌工艺 ,其中添加剂ＤＥ与光亮剂一直使用同一厂家的产品。工作时控制锌碱比例为1∶(8～ 10 ) ,满负荷生产时 ,一般每月底用锌酸盐除杂剂处理一次 ,镀锌槽曾出现过两次故障。1　故障一(1)情况　挂镀和滚镀先后出现镀层粗糙、灰暗的现象 ,镀液分散能力和深镀能力差 ,生产难以正常进行。(2 )分析　故障产生的原因 :①锌碱比例失调 ,锌高碱低 ;②添加剂、光亮剂不足 ;③温度太高 ;④镀液杂质含量高。(3)排除过程　通过逐一检查、分析、调整 ,最后发现温度是引起这次故障的主要原因。锌酸盐镀锌控制最佳温度…     

钾盐镀锌故障排除一例

钾盐镀锌故障排除一例河北省石家庄太行机械厂技术科（０５００００）高建勋我厂钾盐滚镀锌溶液（６００Ｌ），突然出现镀层呈灰色，出光后工件表面变为蓝黑色，而且工件表面有不十分明显的滚筒孔痕，镀液浑浊。问题出现后，我们对镀锌溶液进行了分析，各种成分的含量均在...     

钕铁硼电镀锌故障处理

0前言 本公司在对新开发的45UH磁性材料进行滚镀锌后,镀层表面出现很多宏观的小凹坑、粗糙不平,且缺角较为严重,达不到客户的要求.为此,对所有工序进行了排查和分析,排除了故障. 1 工艺及产品要求 (1)产品牌号和尺寸 钕铁硼45UH,32.5 mm×22.0 mm× 16.0 mm.     

铁丝连续镀锌的生产实践

铁丝连续镀锌的生产过程由拉丝、热处理、前处理、镀锌、后处理和废水处理所组成。本文对上述生产过程中的工艺、设备、质量控制和故障排除等进行了详细介绍。用较大篇幅重点叙述了镀锌液各组分的作用及操作条件对产品质量的影响；分析了各类镀锌光亮剂的作用，并对今后镀锌光亮剂的研究工作提出了期望。     

DPE镀锌工艺的维护管理

我厂是生产"飞乐"牌扬声器的专业厂,低音扬声器的品种及产量均占全国各厂第一位.产品除与本市及外地生产的各类收音机、电视机、录音机等整机配套外,并远销国外.因此,本厂镀锌历来具有量大、质量要求高的特点.1978年电镀锌车间投产时,设有大型数控直线式镀锌自动线3条(挂镀2条、滚镀1条),共计槽液5万升,每日两班制生产,电镀量达1500米~2.在工艺选     

谈谈电镀故障与镀液维护的关系

某电镀厂的玛钢管件采用光亮锌铁合金滚镀工艺，镀液用氯化钾镀锌液配制。最近，因镀层发灰，光亮度差而影响了正常生产。经分析发现，这起质量故障主要是由于滚镀液的维护管理不善所致。１故障从镀层外观判断，故障似与铅杂质过量相似，但现场观察后发现以下问题：（１）...     

中轨式全自动滚镀生产线在杭州问世

由杭州西湖电镀机械设备厂设计并制造的ZGD-X-100型中轨式全自动滚镀生产线于1987年12月26日由杭州市科委主持召开了技术鉴定会,该生产线采用可编程自动控制、中轨式吊车和蜗壳型滚桶结构,从装料-前处理-电镀-钝化-烘干-卸料的全过程均按工艺要求所编程序自动进行,特别适用于标准件及小零件滚镀锌,其主要技术参数如下:吊车运行速度:12米/     

CMR凹版印刷生产线套色故障分析

全面分析了影响ＣＭＲ凹版印刷生产线套色精度、造成套色故障的因素，给出了相应故障的处理措施，对在实际印刷生产中及时排除套色故障、正确使用ＣＭＲ印刷生产线、充分发挥其优质性能具有重要指导作用。     

电镀锌故障排除一则

我厂1993年开始采用氯化物镀锌工艺,2003年5月,为机车车辆配套的连接板组成等零配件电镀锌时出现了电流效率低、局部无镀层的现象,经过分析研究排除了故障。     

Combinatorial Electroless Plating Characteristics for Dense Pd–PSS Composite Membrane Fabrication

Emphasizing upon a process–product combinatorial perspective, this article addresses the role of rate enhanced electroless plating baths for the fabrication of dense Pd/porous stainless steel composite membranes. Adopting phasewise contacting pattern of the reducing agent, plating experiments have been carried out with variegated Pd electroless plating baths at a palladium solution concentration of 0.005 M with a loading ratio of 203 cm²/L for the plating time of 2–6 h. Amongst all processes, surfactant and sonication coupled electroless plating baths provided optimal combinations of combinatorial plating process characteristics for dense Pd composite membrane fabrication.     

Inductive TDR Measurement of Thickness of Conductive Plating on Wire

A pulsed eddy current technique is described that is suitable for plating thickness measurements of low-permeability metals such as Au or Ag on high-permeability wire in the 3-80 mg/ in' range. Equipment costs, speed, and accuracy are such as to make this technique a strong contender not only for laboratory measurements but also for production line testing. The method is usable for plating thickness measurements whenever the ratio of relative permeability to electrical conductivity for the plating material differs substantially from that for the substrate, with the added condition that at least the plating is electrically conductive.     

基于价值流图技术的锁体生产系统优化

以某锁体生产线为实际研究对象,开展了生产线现场调研,收集了大量数据,进行了锁体生产线的价值流分析,明确了该生产线的生产流程,绘制了价值流现状图。在对现行流程中的主要浪费——“过量生产”和“库存”的产生原因进行分析的基础上,基于精益思想设计了锁体生产线价值流的未来状态图,确定了以生产链方式的价值流动生产方式,以看板－超市方式控制生产和库存,并对相关的生产计划、生产线平衡、质量控制、设备等进行了优化和改进。项目实施后生产周期减少928%;库存减少928%。     

瓦楞纸箱生产线选择优化模型

介绍了瓦楞纸箱的生产工艺过程，对影响产品成本各因素进行了分析。同时对瓦楞纸箱生产线选择进行了分析，并给出了一种瓦楞纸箱生产线选择优化的数学模型。使企业减少了资源损耗，降低生产成本，提高了企业在市场的竞争力。     

A multi-decision genetic approach for workload balancing of mixed-model U-shaped assembly line systems

A mixed-model assembly line is a type of production line where a variety of product models similar in product characteristics are produced. As a consequence of introducing the just-in-time (JIT) production principle, it has been recognised that a U-shaped assembly line system offers several benefits over the traditional straight line system. This paper proposes a new evolutionary approach to deal with workload balancing problems in mixed-model U-shaped lines. The proposed method is based on the multi-decision of an amelioration structure to improve a variation of the workload. This paper considers both the traditional straight line system and the U-shaped assembly line, and is thus an unbiased examination of line efficiency. The performance criteria considered are the number of workstations (the line efficiency) and the variation of workload, simultaneously. The results of experiments enhanced the decision process during multi-model assembly line system production; thus, it is therefore suitable for the augmentation of line efficiency in workstation integration and simultaneously enhancement of the variation of the workload. A case study is examined as a validity check in collaboration with a manufacturing company.     

焊条包装生产线主机的研制

目的针对当前焊条包装自动化程度低,技术落后,进口焊条包装生产线价格超高的现状,设计开发HBB20半自动焊条包装生产线。方法按照生产工艺流程和产品技术要求,主要对HBB20半自动包装生产线进行工艺流程设计,包括计量、检测、小包装、透明膜包装、装箱等装置,将单机生产形式变为自动生产线形式,并对小包包装装置及其前后工位物料的传输各部件机构、工作原理进行了分析。结论该焊条包装生产线可以大大降低材料成本,减少人工操作,减小计量误差,提高生产效率。     

衬套内孔尺寸镀铬工艺

油井抽油泵输入泵衬套内孔尺寸镀铬批量生产中存在着工艺参数准确选择、夹具合理设计、槽液维护和调整等一系列问题.通过工艺条件下电流效率的测定和应用试验以及对工艺特点的技术分析,制定了合理的内孔尺寸镀铬批量生产的工艺,取得了理想的效果.     

软胶囊生产线自动装托工作站控制系统设计

目前,软胶囊生产线上瓶装托工序对标签朝向提出了更高要求,标签朝向的一致性将直接或间接影响产品包装的美观度。通常该工序以人工装托为主,耗费了大量人力且效率低下。为此,设计开发了软胶囊生产线自动装托工作站,以桁架机械手为主要执行机构,配套LR-W70色标检测传感器及其他检测元件,通过对胶囊瓶标签识别、瓶输送及定位控制、塑托...     

Applying the TOC thinking process in manufacturing: A case study

A case study is presented to illustrate the application of the Theory of Constraints thinking process logic tools in a manufacturing environment. The study firm performs design activities related to meeting future product requirements while concurrently meeting existing production schedules for the current design of the product. Current approaches to managing the firm's limited productive capacity do not allow for both design and production activities to occur simultaneously while meeting the customer's current product delivery schedule. Thus, despite their desire to satisfy their customer's future design requirements, management uses the majority of its production capacity to meet its customer's current product delivery schedule. This case study demonstrates how a team of employees used thinking process logic diagrams to document reality, identify a core conflict and problem, develop proposed changes to address the core problem, and create several detailed action plans to implement changes within the study organization. Initially, scenarios associated with some undesirable effects are used to understand how prevailing policies and behaviours result in less than desired production line performance. Then, a current reality tree is constructed to link the core problem or system constraint with the previously identified undesirable effects. Next, two major injections are developed to address the core problem in managing the production line as logically documented in a future reality tree. Finally, three transition trees are presented to guide the implementation of change at the study organization.