CASE STUDY OF A LARGE RATCHET WRENCH Essay Example | Topics and Well Written Essays - 1000 words

CASE STUDY OF A LARGE RATCHET WRENCH - Essay precedentIn terms of shape, it is a flat tapering set forth in the lower end and has an grow closed head-end with precise dimensions. Head-end requires to be sufficiently hard to resist wear during use. The material specifications, product size of it and weight of the handle are important factors in the selection of the right combination of materials and production subprogram.a. fiction & machining method The head-end and the long arm can be fabricated as separate parts. The head-end itself can be made in two halves using press forges, to be assembled and welded to form the final shape. The arm part can be enkindled by gas cutting or on profile cutting machine and welded to the base of the head-end. The finished assembly is then annealed, machined on shaping machines to the required profiles and hand-finished by grinding for obtaining imperturbable finish. The completedcomp unitynt is then sent for heat treatment and chrome platin g. This process is elaborate and age consuming and is not fitting for production in large numbers. It can not also be used for non-weldable materials. However, when small quantities are to be produced this method is economical since investment in casting and hammer facilities and special tooling can be avoided.b. Casting The part can be produced by the simple process of sand casting when the required volumes of production are not too high. Castings are easy to produce since technology is well established. Investment costs are not high and the same facilities can be used for any number of differently shaped castings of different materials.c. Forging This method is most suitable and is common for producing large numbers of very high quality pieces. Recurring expenses on costly dies is one consideration. On the other hand, we can get uniformly high quality product that requires little finishing.Considering the pay strength and elongation specifications given, we can use alloy carbo n steel materials for all the three processes. subvert carbon