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相关概念视频

Mechanical Systems01:22

Mechanical Systems

191
Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
191
Open and closed-loop control systems01:17

Open and closed-loop control systems

714
Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
714
Electro-mechanical Systems01:19

Electro-mechanical Systems

937
Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
937
One-Degree-of-Freedom System01:24

One-Degree-of-Freedom System

482
In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
482
Mechanical Efficiency of Real Machines01:14

Mechanical Efficiency of Real Machines

675
The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...
675
Torque Free Motion01:15

Torque Free Motion

472
The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
472

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相关实验视频

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Operation of the Collaborative Composite Manufacturing CCM System
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混合FFF/CNC:一个开源的硬件和软件系统.

Luis Vincent Tejada Martinez1,2,3, Jean-François Witz1,2,3, Denis Najjar1,2,3

  • 1CNRS: UMR 9013 - LaMcube - Laboratoire de Mécanique, Multiphysique, Multiéchelle, Lille, France.

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概括

本研究介绍了一种低成本的混合FFF/CNC制造系统,使用3D打印机和开源软件. 混合工艺显著提高了表面粗度,提高了10的因素.

关键词:
增材制造 增材制造是一种增材制造.我们的CNC是CNCCNC.FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF混合动力是一个混合动力.磨削磨削的方法 磨削减量制造业 减量制造业是指减量制造业的生产方式.

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科学领域:

  • 制造业 工程 制造工程
  • 材料科学 材料科学 材料科学
  • 增材制造 增材制造 增材制造

背景情况:

  • 传统的制造工艺往往在实现所需的表面完成方面面临限制.
  • 混合添加和减去制造为改善材料性能和表面质量提供了潜力.
  • 将CNC削与合丝制造 (FFF) 整合在一起,为低成本,高精度的制造提供了机会.

研究的目的:

  • 开发和评估一个低成本的混合合丝制造 (FFF) 和计算机数控 (CNC) 制系统.
  • 评估混合制造工艺对表面粗度参数的影响.
  • 调查开源软件解决方案在实施混合制造方面的有效性.

主要方法:

  • 在一个多工具3D打印机 (E3D"ToolChanger") 上安装了一个螺旋,用于CNC削.
  • 使用了两个开源软件解决方案:用于CAM编程的FreeCAD和用于层次混合的SuperSlicer.
  • 进行了实验测试,以比较混合工艺之前和之后的表面粗度.

主要成果:

  • 开发的混合系统成功地将表面粗度参数提高了10倍.
  • 在施工和沉积/加工方向中观察到表面粗度的均化.
  • 层对层的混合化证明了由于压力和温度升高的最小化而导致的优越表面粗度结果.

结论:

  • 拟议的低成本混合FFF/CNC系统有效地提高了表面质量.
  • 开源软件集成使先进的混合制造技术的可访问实施成为可能.
  • 层对层的混合化方法在混合制造中特别有效,以实现优越的表面表面.