Design and Fabrication of Inverted Cup Single Action Press Draw Tool
B.S. Surendra, G.M. Sandeep, P. Balachandra Shetty
Mechanical Engineering Department, Nitte Meenakshi Institute of Technology, Bangalore, India
Abstract: The seamless drawn cups typically find wide applications in all the fields of life such as food storage cans, appliances, automotive and aerospace industries. The operation of cup drawing using flat sheet metal blank requires two forces, one for drawing operation and the other is for strip holding force to control the flow of stock during drawing operation. Generally drawing operation is carried out using straight type draw tool (punch at the top and die at the bottom) utilizing Double Action Press which gives the two required forces.
The present paper deals with the idea of designing and fabrication of an Inverted Draw Tool which an perform in Single Action Press. This Press gives only one force which is utilized for drawing and the other force required for strip holding is created in the tool by means of a compression spring. The trip holding force is calculated using empirical formula which is related to drawing force. The spring of suitable design is selected for use. The provision is made in the tool to vary the spring force so that the optimum spring holding force can be obtained by trial and error method to enable getting drawn components without draw defects. The design and fabrication of the inverted draw tool was successful and drawing operation from the stock was carried out. See More
International Journal of Latest Technology in Engineering, Management & Applied Science
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