贴片机棘轮送料器械设计

贴片机是现代电子产品生产线中的关键设备,送料器是SMT生产线上将元件由料带送至吸嘴口的设备,一般安装在送料车上,此设备的精度直接影响整条生产线的生产效率。在气动式贴片机送料器的设计过程中,采用杆组设计理论逐一完成各功能部件的机构设计,给出了要完成预定运动轨迹各零件间需满足的尺寸关系,同时对关键机构进行运动精度分析,并运用SolidWorks三维软件进行虚拟装配设计,为送料器的实际生产提供了数学模型。该设计简单,紧凑且精度较高,易于实现系列化生产。     

全气动自动步进送料器回路设计

该文在分析现有送料器回路的基础上,提出一种完全步进的气动送料回路,与传统的气动步进送料回路相比,提高了送料精度和可靠性,并在实际中得到了应用,取得了较好的使用效果.     

伺服送料器结构刚度对送料精度的影响分析

对金属冷弯成型生产线中伺服送料器的送料精度问题进行研究,分析伺服送料器结构刚度对送料精度的影响。通过分析,找出伺服送料器结构刚度的薄弱环节,为结构优化提供依据。     

小零件漏斗自动送料器设计分析

在零件自动加工与装配中,漏斗送料器是自动化装置的重要组成部分。本文分析了小零件在漏斗送料器中的运动特征;论述了送料效率与送料器结构的关系,为设计提出了理论依据。文章给出了理论与实验研究结果。     

环形压电双晶片驱动式振动送料器

为了满足现代工业领域中对轻、薄、小产品平稳输送的要求,提出了一种采用环形压电双晶片作为驱动源的新型振动送料器。设计了振动送料器结构,分析了振动送料器的工作原理,测试了压电双晶片振子的性能,利用有限元软件ANSYS确定了压电双晶片振子的工作模态,研制了送料器样机并进行试验测试。试验结果表明：当振动频率为86.5～91.5Hz时,送料器具备输送物料的能力;当系统共振时,输送速度最快,随着电压的增加,送料速度呈线性关系增加;与同型号的电磁振动送料器相比,研制的环形压电双晶片驱动式振动送料器消耗电流仅为其16%,工作噪声下降22dB,输送稳定性好。     

不停车快速送料装置

在加工汽车制动分泵活塞时,我们采用不停车快速送料装置,来调头精车端面及倒角,精度好、效率较高。此装置由自动送料部分和夹具部分组成(图2)。自动送料部分包括送料器、送料气缸和装料器。送料器的结构见图1,主要由料斗1、推杆7和弹簧9组成,装在尾座上,由送料气缸送往夹具,送料器旁边装有装料器(结     

数控车床棒料送料器的选配与使用

１引言在成批生产中,用数控车床加工小型回转体零件,突出的问题是如何高效地进行备送料。只有解决了这个问题,才能充分发挥数控车床高精度、高效率的特点。使用数控车床自动棒料送料器可以解决高效备送料的问题,同时,还可以提高材料的利用率。２送料器的结构与工作原...     

滚针双头自动刮头车

滚针两头车削采用双头刮头车床,自动上下料,每班车削6500支(双头)。机床外形和动作如下:1.送料:振动送料器送料,在接近夹料位置时,气吹送料进夹料器。     

离心驱动式振动送料器结构分析与实验研究

针对工业生产中振动送料器噪音大、成本高、输送不稳定等问题,对振动送料器进行了研究,设计了一种离心驱动式振动送料器,并对其进行了实验研究.首先,以离心电机的离心运动作为驱动源,研究了直线振动送料器的工作原理,建立了其数学模型,并对该振动送料器进行了动力学仿真;然后,制作了送料器实验样机,采用三维测振仪对该振动送料器样机的...     

薄板式缝焊机自动送料器

目前薄板式散热器的生产量逐渐增大,散热器周边的焊缝均采用缝焊机焊接。但在焊接时因大多是手工送料,使得散热器在大批量生产时,焊缝的直线度和转角R值难以精确掌握,从而影响了焊接质量。为此,我们设计了一种自动送料器。该送料器可用于FN系列缝焊机上,     

等离子辅助镀膜技术在优质高产的镀膜系统中的应用

大规模生产高质量薄膜产品是今后镀膜设备需要解决的问题。等离子体或离子辅助镀膜现在被广泛应用于高质量膜系生产中并取得了良好的效果,但是主要由于等离子体或离子源的原因,产能不高。介绍了一种新型精密光学镀膜系统和一种新型溅射镀膜系统。新的系统能够优质高效地生产复杂膜系,特别适合大规模生产。     

A high shear rate, high pressure microviscometer

The development of a high shear rate, high pressure microviscometer is described. This viscometer was developed specifically to examine a highly loaded, dynamic contact generated in a small volume of fluid. The viscometer was used to examine the fluid film formed by the mechanism of elastohydrodynamic lubrication in the presence of an SAE 50 oil. A complete numerical analysis of the resulting elastohydrodynamic contact was performed.     

Flying high

If your material costs are soaring up your balance sheet you may think that nothing can be done. Not so, says Stephen Plummer, who shows you how to bring them gliding back down.     

高温高压模拟井筒的设计

根据教育部"石油天然气装备"重点实验室的建设要求,设计了能模拟3000 m井下工况的高温高压模拟井筒.该装置通过泵和电加热器循环加热井筒内的液压油.使其基本达到预期温度;用加压泵循环加压至设定压力,再由循环泵和盘管保持设定温度,实现井下温度和压力环境.根据设计条件采用第三强度理论确定模拟井筒的壁厚,进而确定井筒的结构方案;同时进行了系统热平衡计算,根据循环装置的设计使用要求选定了电加热器的功率.     

采用高速高精度磨削的优点

分析高速高精度磨削工艺,提出其可以提高工件表面质量和加工精度及磨削效率,且操作简便,成本低.     

Energy dissipation of materials at high pressure and high temperature

We report an experimental method to study the anelastic properties of materials at high pressure and high temperature. The multianvil high pressure deformation device, used to apply a cyclic loading force onto the sample, can reach 15 GPa and 2000 K. A synchrotron x-ray radiation source provides time resolved images of the sample and reference material. The images yield stress and strain as a function of time; stresses are derived from the reference material, and strains from the sample. This method has been tested by applying a sinusoidal stress at megahertz to hertz frequency on a San Carlos olivine specimen at 5 GPa and up to 2000 K. Strain as small as 10(-5) can be resolved. We have obtained experimental results which exhibit resolvable attenuation factor (Q(-1)) and shear modulus (M) at deep Earth conditions. These results are in quantitative agreement with previously reported lower pressure data and suggest that temperature and grain size have dominating effect on these properties.     

A high temperature high pressure cell for quasielastic neutron scattering

We present our recent development of a high temperature high pressure cell for neutron scattering. Combining a water cooled Nb1Zr pressure cell body with an internal heating furnace, the sample environment can reach temperatures of up to 1500 K at a pressure of up to 200 MPa at the sample position, with an available sample volume of about 700 mm(3). The cell material Nb1Zr is specifically chosen due to its reasonable mechanical strength at elevated temperatures and fairly small neutron absorption and incoherent scattering cross sections. With this design, an acceptable signal-to-noise ratio of about 10:1 can be achieved. This opens new possibilities for quasielastic neutron scattering studies on different types of neutron spectrometers under high temperature high pressure conditions, which is particularly interesting for geological research on, e.g., water dynamics in silicate melts.     

高强度高刚度钢带缠绕预应力模具

基于精密冷锻和人造金刚石合成等高负载条件下材料加工工艺对模具强度、刚度提出的高要求,深入分析了传统年轮式预应力模具的结构与存在的问题,介绍了钢带缠绕预应力模具的特点与技术优势,阐述了钢带缠绕预应力模具设计的基本原理与方法,研制了钢带缠绕预应力模具制造专用设备,提出了缠绕张力的产生原理与控制方案.     

Development of a high resolution and high dispersion Thomson parabola

Here, we report on the development of a novel high resolution and high dispersion Thomson parabola for simultaneously resolving protons and low-Z ions of more than 100 MeV/nucleon necessary to explore novel laser ion acceleration schemes. High electric and magnetic fields enable energy resolutions of ΔE∕E < 5% at 100 MeV/nucleon and impede premature merging of different ion species at low energies on the detector plane. First results from laser driven ion acceleration experiments performed at the Trident Laser Facility demonstrate high resolution and superior species and charge state separation of this novel Thomson parabola for ion energies of more than 30 MeV/nucleon.