共查询到19条相似文献,搜索用时 218 毫秒
1.
2.
《锻压装备与制造技术》2020,(3)
为达到北美市场的UL认证要求,特选用西门子S120 AC驱动联合汇川ISMG1伺服电机运转福伊特齿轮泵作为主动力源,采用西门子S7-1200安全PLC通过PROFINET通讯网络实现总控,利用伺服泵控高效率、高响应、节能等特点实现一次性塑料餐具替代品可降解植物纤维高温高压成型,通过机器人、浆池、模具等配合实现可降解一次性餐具的自动化生产,满足车间无人化、餐具批量化生产的要求。 相似文献
3.
在高速走丝电火花线切割机上实施慢走丝多次切割加工,并对用此工艺方法加工的工件表面质量进行检测、分析,指出在快走丝机上实施慢走丝多次切割工艺能有效地改善模具的表面质量。 相似文献
4.
铝合金模具在实际应用中产品成型生产效率高、表面质量好,但同时其制造工艺及制造精度要求极高。采用UG软件,针对某水果包装模具,结合实际生产条件制定优化加工工艺,通过UG等高策略编制加工程序,并仿真模拟,验证刀路正确性。根据优化程序生产出合格模具,并检测证明该模具制作精度达到工艺要求。 相似文献
5.
线切割加工工件表面质量的改善与提高 总被引:6,自引:0,他引:6
对在线切割加工中影响工件表面质量的主要原因一送丝机构、工艺参数、工作液等方面作了分析,同时提出了进一步提高工件表面质量的相应措施。 相似文献
6.
塑料制件(以下简称“塑件”)的设计问题是塑料模具设计与制造的首要问题。塑件设计好坏,决定了模具设计与制造的难易程度,决定了模具的成功与失败,是模具设计的先决条件。所以塑件的设计成了模具设计中非常重要的第一步,而在塑件的设计中,人们往往注重其形状的设计、尺寸与精度的选择,而忽略塑件的表面设计问题,从而忽略塑件的表面质量与模具的凸凹模结构及模具加工工艺的有机联系。塑件内外表面质量的设计如何,不仅对塑件的整体质量影响大,同时也对模具加工工艺和模具结构工艺性影响很大。1 塑件表面的设计塑件表面设计按不同的要求,应包… 相似文献
7.
热作模具因工作环境恶劣,在服役过程中易出现失效,造成资源浪费和成本升高。热作模具修复工艺可以延长其使用寿命、提高生产效率,修复层需经加工才能在表面质量和尺寸精度上满足使用要求。滚压加工是一种经济高效的光整强化工艺,通过滚压工艺可以提高热作模具修复层力学性能和使用性能,对热作模具修复层滚压加工的研究逐渐成为当前的研究热点。介绍了热作模具常见的失效形式和性能要求,从修复预处理、修复方法、修复后处理三方面概述了热作模具修复工艺研究现状,综述了修复层滚压加工研究现状,分析了传统滚压存在的问题,对滚压工艺的发展和热作模具超声滚压研究进展进行了介绍。在此基础上,对热作模具修复层的超声滚压加工研究进行了展望。 相似文献
8.
9.
挤杆工序是GH4169合金叶片热成形的首道工序,作为制坯工序,其不但要保证精确的尺寸形状,还要确保工件组织达到工艺要求。模具的工况严重地影响了工件的内在质量。基于Archard磨损理论,以凹模为研究对象,采用Deform-2D有限元软件对其磨损过程进行数值模拟,通过分析工件的模具温度、模具硬度、挤杆速度、摩擦系数、凹模圆角半径等工艺与模具参数对凹模磨损的影响,获得了相关因素对凹模磨损的影响规律;采用磨损量累计,按工艺要求以最大磨损量0.2 mm对凹模寿命进行预测。结果表明:采用有限元模拟挤杆过程,分析模具受力和磨损情况及其对工件质量的影响,进而优化模具设计和工艺参数,在提高工件质量的同时,延长了模具寿命,降低了生产成本。 相似文献
10.
通过对端子的工艺分析,提出无芯冷挤压工艺.研究了工艺参数选择计算、模具设计和质量控制.采用了保证工件与下模型孔对中性良好的具有导向的组合式模具结构.对试验中出现的质量问题,采取了可行的措施.经生产验证,该挤压工艺简化了工艺装备和操作,节省了原材料,能够提高工件精度、生产率、表面质量和机械性能,有一定的经济效益和社会效益.对该类产品的毛坯生产,有一定借鉴意义. 相似文献
11.
12.
13.
以植物纤维粉料为原料研发生产一次性如餐具等包装产品,产品生产工艺采用粉料模具冷冲压直接成型。装备研发中,通过震动填料,解决粉料因粘、湿而结砣成球形成的卡、塞、搭等现象,保证粘湿粉料在模具内分布均匀;设计独立的定量加料仓,加料工位与成型工位对称分布于工作台上,旋转工作台,加料、成型形成多工位,缩短加料、成型时间。在样机试制成功基础上,将震动填料、定量加料、成型和开模取件等工序按工艺要求合理有序联结,进行自动化升级改造,开发了自动化成型机。该成型机已申请并获得国家实用新型专利,在生产中节约生产时间,提高生产效率。 相似文献
14.
15.
16.
The assembly of large components is characterized by a large number of varieties and a high process influence by environmental factors. For this reason the assembly in the field of truck manufacturing is in most cases carried out as a moving line with a high percentage of manual processes. Automation of these assembly process, albeit desired from a quality viewpoint, is presently limited as it requires the workpiece to be stationary. The ability to keep the workpiece on the moving assembly line while keeping the used handling systems flexible can enable business benefits. By assembling for example the windshield of a truck in motion, lead times can be shortened and floor space requirements can be reduced while at the same time the quality can be increased. To enable assembly in motion of large components, it must be possible to synchronize the movement between the handling system and the moving workpiece placed on an unguided transport system. Within this article we describe a Model Predictive Control Approach for robotic assembly of large components on moving assembly lines. One approach to synchronize the motion between product and robot is a direct metrological reference between them. This can be done by using an iGPS metrology system in which every handling system can be referenced to every work piece throughout the whole production line. The measurement system must be able to detect sufficiently small movements to ensure a reliable synchronization and thereby a high quality of the assembly process. The interaction of several systems makes for a number of restrictions. Here especially the delay times of the measuring system and the preset position for the robot have to be taken into consideration. To control the assembly process, a model predictive control loop is necessary. Only this control approach can meet the restrictions which are strictly necessary for the assembly. This article shows the first results and describes a demonstrator which has been set up to mount a windshield on a moving truck cabin with the help of a robot. 相似文献
17.
18.
Since the wear of a grinding wheel has a direct effect on the workpiece vibration and both have effect on the workpiece quality, the main goal of this work is to study the relation between the process vibration signals and the workpiece quality (mean roughness, circularity and burning) as the grinding wheel gets worn, in an attempt to use these signals to decide the exact moment to dress the wheel. In order to reach this goal, several experiments were carried out in a plunge cylindrical grinding operation of an AISI 52100 quenched and tempered steel, having as input variables the dressing overlap ratio, the spark out time and the workpiece velocity. The output variables were the workpiece surface roughness and circularity and also the process vibration during both, the cutting phase and the spark out phase of the grinding cycle. The main conclusions were: (1) it is possible to have good workpiece quality even with a vibration level much higher than that obtained with a recently dressed wheel; (2) vibration during cutting phase and at the end of complete spark out can be used to monitor the wheel condition at least when high dressing overlap ratio is used; and (3) the decrease in the spark out time makes the vibration at the end of spark out increase a lot, but does not cause such a damage in surface roughness. This fact makes the use of partial spark out feasible in some situations. 相似文献
19.
研究单晶硅片磨削用陶瓷结合剂金刚石砂轮的组织结构对砂轮性能的影响,评估砂轮组织结构对砂轮磨损速率、磨床主轴电流、磨削后的单晶硅片表面粗糙度及其表面形貌的影响。试验结果显示:主轴电流随着砂轮组织中孔隙率的增加呈现下降趋势,从最高的7.0 A降低至6.3 A;砂轮的磨损速率则表现出相反的规律,气孔率最大的砂轮的磨损速率是最小的砂轮的近2倍,分别为2.525 2 μm/片和1.423 8 μm/片;砂轮组织结构对磨削后工件的表面粗糙度影响不大,工件的表面粗糙度Ra值分别为7.67、7.47和7.37 nm;但当气孔孔径过大、孔壁变薄时,会造成磨削工件表面出现深划痕,导致硅片磨削质量恶化。 相似文献