Keywords: Product, Casting- Forming- Joining- Machining- Rapid Prototype
Methods of Manufacturing
DEFINITION OF MANUFACTURING
Manufacturing is a sequence of effective and economical processes to convert raw material into a useful finished product as per National or International standards. Manufacturing is wealth producing while a service sector is wealth consuming. Steel industry and semi-conductor industries name manufacture as fabrication.
Definition of a product
Product is an item made with certain specifications for a useful purpose.
TYPES OF PRODUCTS
1. Tangible Products
Tangible products are ready to use after manufacturing. Burger, book, Shoe, jewelry, Bulb, tube light, mobile phone, pen, chocolate, computer, shirt etc. are tangible products.
2. Intangible Products
Intangible products are not ready to use directly after manufacturing. software, insurance, trademark, customer list, service contract, lease agreement etc. are some of intangible products.
Mechanical engineering involves the production of only tangible products.
MAIN MANUFACTURING METHODS
The type of manufacturing process depends on the characteristics of raw material available and the final finished useful product required.
Definition of Casting, Forming, Joining, Machining and Rapid Prototype Methods of Manufacturing
DEFINITION OF CASTING
Casting is a one step high temperature process which uses molten metal to make a product of specific shape and size. Casting makes uses molds (cavity) to hold the molten material in a desired shape until it gets solidified.
DEFINITION OF FORMING
Forming uses relative low temperatures as compared to casting and uses force to make a product of specific shape and size.
DEFINITION OF JOINING PROCESS
Most of the final products consist of many parts which are joined / assembled to form the final useful finished product.
DEFINITION OF MACHINING PROCESS
Machining is the process controlled removal of material from a work piece in order to create a specific shape or specific surface finish.
DEFINITION OF RAPID PROTOTYPING
Useful final finished products are produced by casting directly from use of a software.
COMPARISON BETWEEN WELDING AND RIVETING
Advantages of Welding
Welding is fast and hence saves time in manufacture and assembly
Welding provides more strength
Welding produces light structures
Disadvantages of Welding
Welding is costly as welding equipment is costly and requires highly skilled worker.
Deposited metal is very costly
Welded joints do not have damping capacity.
Welded parts have excessive deflection.
Mostly riveted joints have been replaced by welded joints. However where high temperatures are encountered, riveted joints is the only choice.