Machine Parts

Some notable disadvantages or drawbacks of nesting or cavity type locator are as follows: Ø 1.  Since the work piece is completely surrounded,it is difficult to lift it out from the nest. Ø 2.  The operation performed may produce burrs,chips, dirt on the work piece which tends to lock it intothe nest. Ø 3.  Ejecting device is necessary. Ø 4. Additional time is required during operation. Ø 5.  It takes higher cost for making nest.

Machine tool represents a machine itself such as lathe machine,drill machine and cutting tool is a component of machine. Leaf jig is distinguished by its hinged cover,or leaf,which is swing open to load or unload the jig as shown in the following figure.After the workpiece has been located inside the jig,the leaf is firmly closed and locked. Leaf jigs can be loaded and unloaded quickly and are suitable for complicated workpieces with irregular contours.Holes may be drilled in more than one surface for a single loading of the jig.Drill bushing may be located in the leaf and reamer bushings in the base,providing the leaf   is rigid enougf to withstand the pressure exerted by the reamer.

Vibratory compaction: In a rigid die pressure and vibration applied at one time to a mass of powder. Finding level of densification it is used lower pressure when we compare it with ordinary die compaction. There have a disadvantage of vibratory compaction such as equipment design of practical apply in tooling and presses. Continuous compaction: Continuous compaction mainly used in simple shape some examples are plate, sheet, tube and rod. Most of the commercially techniques entangle following loss powder between set of vertically oriented rolls. The roll small distance is set up a compact of desired properties. When we compare it with operation of conventional rolling powder rolling speed is less.  Slip casting:    Slip casting have some limitations for it’s extent metals and broadly used in ceramics. Slip casting process slip firstly prepared which is free from liquid vehicles and additives to prevent particles setting. Then the slip is placed in mold