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Integration System for Fixture Layout Design
Published in Awais Ahmad Khan, Emad Abouel Nasr, Abdulrahman Al-Ahmari, Syed Hammad Mian, Integrated Process & Fixture Planning, 2018
Awais Ahmad Khan, Emad Abouel Nasr, Abdulrahman Al-Ahmari, Syed Hammad Mian
The candidate locating faces should be along three mutually perpendicular planes. The clamping should be positioned to direct the clamping force on the strong, supported part of the work-piece. There are two common clamping types: overhead and side clamps. The overhead clamp applies a force perpendicular to the fixture baseplate and the side clamp applies a force parallel to the fixture baseplate. Since an overhead clamping scheme is preferred to a side clamping scheme for locating accuracy, the fixture configuration with overhead clamps will be considered preferentially (Figure 7.10).
A net-shape forming process of Ti–6Al–4V sphere joints
Published in Powder Metallurgy, 2021
Ce Zhang, Yu Pan, Jianzhuo Sun, Xin Lu, Jiazhen Zhang
With the development of metal materials, Ti alloys begin to get more attention due to its combination of properties, like high specific strength and stiffness, outstanding corrosion resistance. Sphere joints not only need to have excellent structural strength but also require overall lightweight design, which is suitable for Ti alloys [8]. But the practical application is limited by costly, multi-step process of fabrication and associated geometry design constraints. At present, the traditional manufacture process of sphere joints is mostly machining. Because the axis of each hole is spatially distributed through the centre of the sphere and the angle of each hole position is complicated. Repeated clamping during processing will cause large positioning errors and low accuracy. So, this method has complicated procedures, low production efficiency and high production cost. On the other hand, the Ti alloy itself has poor machining performance and high processing cost, which further limits the application of traditional machining technology to Ti alloy sphere joints [9].