Joint design manufacturing processes

To achieve the goal of required performance, durability, and cost of plate materials, one approach is improvement of the control of the composition and microstructure of materials, particularly the composite, in the material designing and manufacturing process. For example, in the direction of development of thermoplastics-based composite plate, CEA (Le Ripault Center) and Atofina (Total Group) have jointly worked on an irmovative "microcomposite" material [33]. The small powders of the graphite platelet filler and the PVDF matrix were mixed homogeneously by the dispersion method. The filler and matrix had a certain ratio at the microlevel in the powder according to the optimized properties requirements. The microcomposite powders were thermocompressed into the composite plate. 

The first step in designing a QMS is determining business needs and the processes required to support the enterprise. Important consideration must be given to ensure that all processes are included in the assessment. The assessment must include all activities that affect product quality at corporate, business, manufacturing, distribution, contractors, or joint venture sites. Processes controlling incoming materials from vendors, laboratory services, contractual support, and other inputs should also be included in the initial assessment. 

Besides the fundamental work cited above, IPMS in Kiev did carry out some research work in the field of Cr-Re structural alloys, unfortunately the works were stopped in the mid-80 s, with the clear statement that Re alloying strongly decreased the DBTT of Cr-Re alloys, but without providing precise data neither on their mechanical, chemical nor thermal properties. The joint research projects between IPMS, UPC and EADS that this document partly summarizes aims at designing a suitable manufacturing process for these alloys and characterize the relevant properties for EADS related applications. 

Joint Design Allowables and Service Life Assessments. Friction stir welding has been demonstrated in a variety of joint designs (Fig. 13.15). The most commonly used joints are the full-penetration butt joints and the parfial-penetration lap joints, followed by the edge joint, capture joint, and fillet joint, listed in order of ease of manufacture. Friction stir welding is not a dropin process, and existing riv-... 

Chapter 6 deals with shape design of deformable machines. Manufacturing process is developed to form actively deformable materials as desired. Previous approach to design deformable machine was to divide the stiff element into small pieces and add controllable or passive joints[162, 163]. The reversed approach was taken. 

Many of the adhesive problems that develop are not due to a poor choice of material or joint design but are directly related to faulty production techniques. The adhesive user must obtain the proper processing instructions from the manufacturer and follow them closely and consistently to ensure acceptable results. Adhesive production involves four basic steps. 

To enable effective fabrication using adhesive bonding, a wide range of factors must be considered which relate to the process of creating the bonded joint, most normally within a manufacturing environment. Examples of which include some areas already covered previously such as joint design and assembly needs but within those processes, adhesives have to be suitable to either remain in situ when applied (thixotropic pastes) or flow into inaccessible areas when the joint is formed. They have to cure in a controlled fashion either from an internal chemical reaction (room temperature systems) or by some external stimulus such as heat or light. 

The pilot-production phase may be carried out either as a shared responsibility between the development laboratories and its appropriate manufacturing counterpart or as a process demonstration by a separate, designated pilot-plant or process-development function. The two organization piloting options are presented separately in Figure 1. The creation of a separate pilot-plant or process-development unit has been favored in recent years because it is ideally suited to carry out process scale-up and/or validation assignments in a timely manner. On the other hand, the joint pilot-operation option provides direct communication between the development laboratory and pharmaceutical production. 

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