基于视觉传感器获取的深度信息,提出测量空间圆柱孔的新方法.空间圆柱孔的大小和位置以圆柱孔的上平面和圆柱孔的大小及位置表达.直接用圆柱孔上平面的点云以最小二乘法拟合上平面方程.圆柱孔中心轴线的初始点选择在XOY平面上,采用单位向量法,使最小二乘法拟合圆柱孔曲面的参数从7个简化为5个,并采用改进算法,简化误差方程.通过实验验证,表明了所提方法的可行性和有效性.

基于智能制造技术技能人才培养和服务区域产业转型升级的需要,提出生产性智能制造生产线实训平台功能设计要求,开展了生产性智能制造生产线的设计和建设,包括典型零件的选择、生产线设备选择、零件加工流程设计和组成单元分析等内容,同时进行了实训平台的配套建设.

"双带头人"教师党支部书记工作室建设是高职院校党建工作的一项品牌质量工程.针对"双带头人"培育工程建设存在的问题,从"双带头人"工作室负责人选拔、教学团队建设、课程思政和专业群建设等方面,探讨工作室党建和业务的融合建设路径.

1+X证书制度是深化国家职业教育改革、构建职业教育国家标准的一项重要举措,院校是试点工作的实施主体.本文基于院校视角分析建立X证书评价遴选机制的必要性,提出主要评价要素和评价遴选方法,助推1+X证书制度真正落实到位.

该项目是设计一条功能齐全,集教学和生产为一体的智能制造自动化生产线.通过对生产线进行分模块设计,基于VisualOne进行生产线仿真搭建,可以直观发现生产线布局和加工流程问题,优化生产线布局,为后期智能制造自动化生产线的设备采购和实物搭建提供可靠支持.

以某薄壁壳体为研究对象,采用正交试验法设计试验方案,基于Mold flow进行数值模拟分析,并对结果进行均值分析和极差分析,得到了第一次优化后的注塑工艺参数组合.在第一次优化的基础上,重新设计正交试验方案,基于训练好的BP神经网络,得到模拟试验结果,经过均值分析确定最优注塑工艺参数组合.结果 表明,最优注塑工艺参数组合的翘曲变形量最小,有效提高了塑件质量.

为实现全课程育人,选取学时长,覆盖面广的工科专业基础课——机械制图与CAD开展课程思政教育教学改革.在学情分析的基础上,以社会主义核心价值观为指导,以学科体系为载体,以课堂教学为平台,挖掘课程蕴含的思政元素,调整课程教学内容,形成以培养学生遵纪守法意识和培育工匠精神为主线的课程思政体系,为工科专业课程思政教育教学提供了改革思路和实践经验.

Mold design is one of the core skills for students major in mold design and manufacturing. In this paper, augmented reality (AR) system is introduced to teach students on the acquisition of mold inner structure design. The AR teaching system can be deployed in mobile terminals such as intelligent mobile phone or pad, at which the students can rotate and scale the three dimensional (3D) models, read explanatory notes and play the voice illustrations.

以某剃须刀头固定架为研究对象,采用正交试验法设计试验方案,基于Moldflow进行数值模拟分析,运用加权综合评价法将多目标优化问题转化为单目标优化问题,并对结果进行极差分析,得到了兼顾多目标优化的熔融温度、模具温度、充填时间、保压压力和保压时间等5个工艺参数的优化组合.对优化后的工艺参数组合再次进行数值模拟,结果证明优化工艺参数组合的综合评价分最高,可有效提高塑件质量.

通过对汽车遮光板塑料挂钩的工艺性分析,对生产该塑件的模具进行设计,并对模具分型面的选择、型腔数量的确定及排布、浇注系统、成型零件、冷却水道的设计进行了分析和阐述.实践表明,该模具结构设计合理,生产效率高.模具采用潜伏式浇口,塑件表面不会留下浇口去除后的痕迹,塑件表面质量好,适合用于大批量生产.

浇口尺寸的选择影响着注塑件成型的质量,通过对4种浇口尺寸方案的注塑数值模拟结果进行比较分析,从中选择最优的浇口尺寸方案,在注塑模生产之前优化模具结构,改善熔接线和缩痕等缺陷.

针对未知自遮挡物体的测量和三维重建问题,提出利用Kinect Fusion技术快速重建和线激光精密测量相结合的视点规划新方法.应用Kinect Fusion技术快速获取未知自遮挡物体表面的深度信息模型,研究提出轮廓表面的截面特征信息提取方法,在此基础上分析轮廓表面的截面形状特征,根据五自由度线激光测量系统的左右方向和上下方向测量可视性判断,在最佳测量范围内进行线激光测量全局视点规划,准确、快速消除自遮挡和点云孔洞,最后获得重建精度高的三维物体表面.经过自遮挡物体重建实验,验证了所提方法的可行性及有效性.

针对某发电机的ADC12铝合金加工件在高速切削时存在的加工问题,采用有限元仿真技术,以优化切削加工参数为主线,把高速切削过程简化为二维正交切削模型,选用Johnson-Cook塑性材料本构模型,对二维有限元切削仿真分析过程中存在的若干个关键问题进行讨论.结合实际加工的经验数据,通过组合不同的切削深度、切削速度和进给量等切削参数进行仿真比较,得到仿真结果并通过实际加工验证,确定最佳切削加工工艺方案,为铝合金高速切削加工的稳定性预测和改进加工工艺提供了理论依据.

A method is presented to accurate face-mating point cloud registration after dealing with noise point. Point cloud registration is divided into two parts,firstly,coarse registration is applied for visual point cloud,then three local sufaces of overlap cloud region are selected to be mating calculated after denosing base on least squares fitting , at last accurate splicing parameters of translation and rotation are acquired by nonlinear least square .This algorithm is easy to deal with the denosing, has faster convergence speed and higher registration accuracy.Its feasibility is proved by samples.

Focusing on discreteness of point cloud data acquisition from an object surface, a method of point cloud accurate registration was proposed based on surface fit. Firstly, initial point cloud registration about sensor from different view points was completed. Then, selecting three local surface from the surface overlap areas of point cloud by contain sphere, the local surface fitting with three-dimensional quadratic surface equation, the rotation transformation using quaternion method, the translation and rotation parameters about accurate registration were obtained by means of nonlinear least square optimizing method. The algorithm has faster convergence and higher registration precision. The experimental results indicate the effectiveness of the proposed method.

Based on the components of machine-vision systems and the categories of viewpoint planning methods,the advances of known and unknown model-based viewpoint planning methods are first introduced,the occlusion problems,which should be resolved during viewpoint planning,are analyzed.Finally,the future directions are prospected.

Focusing on the problems of occlusion and holes in view planning research,a new method was presented,which could eliminate effectively the problems of occlusion and holes with establishing minimum contain box of the hole boundary point clouds.The whole process of view planning was divided into two parts: the laser scanning view planning of side surfaces and the scanning view planning of hole and occlusion surfaces.The parallel surface of least-square plane about hole boundary points was used as the movement plane of vision system scanning hole surfaces,so the translational motion range of the vision system was greater than the plane range of the minimum contain box,and the point cloud data of hole surfaces were obtained.Finally,experimental results show the effectiveness of this method.

The product data exchange technology based on STEP and XML is explained.On the ba-sis of analyzing the method of transforming between STEP and an XML file,the integration model on web of product data exchange technology is proposed.

Combined with actual mold processing and machining process planning of parts,and based on the three attributes,which are product quality,cost and production cycle,a multi-attribute evalu-ation system structure for processing scheme of mold machining is constructed.So,an evaluation arith-metic model is established,and the arithmetic is described in detail as well.Finally,an example of mold machining about the processing scheme of mold machining is calculated and analyzed based on the proposed evaluation method,which is proved to be practical.