DESIGN AND DEVELOPMENT OF MULTI SPINDLE DRILLING MACHINE

This paper discusses the case study and comparison with productivity of component using traditional drilling machine to Multi spindle drilling machine. The growth of Indian manufacturing sector depends upon many factors, one of the major factors being manufacturing efficiency with which the operation /activities are carried out in the organization. Productivity can be improved by reducing the total machining time, combining the operations, etc. There are frequent needs of tightening and loosening screws, drilling, tapping, boring and grinding operational machines. Huge and complicated designed parts cannot be machined in ordinary machines. In a single machine all the above specified operations can be carried out after drilling operation by removing of drill head and using the required tools like grinding, tapping can etc. By this we can achieve our industrial requirements and production targets. Here we are going to develop a single multi spindle drilling machine which can useful for drilling multiholes and tapping operations in single setup of work piece.In case of mass production where variety of jobs is less and quantity to be produced is huge, it is very essential to produce the job at a faster rate. This is not possible if we carry out the production by using general purpose machines. The best way to improve the production rate (productivity) along with quality is by use of special purpose machine. Usefulness and performance of the existing radial drilling machine will be increased by designing and manufacturing of multi spindle drilling head attachment. This paper deals with design and development of multi spindle drilling head for cycle time optimization of the component. Multi-spindle head machines are used in mechanical industry in order to increase the productivity of machining systems. Such machines are equipped by spindle heads that carry multiple tools for performing machining operations.[1] The most noteworthy aspect when using multi-spindle machines is the cycle time, due to parallel machining the total operating time is dramatically decreased. Added benefits include less chance for error, less accumulated tolerance error, and eliminate tools changes. In such a multi-spindle machine, a part to be machined is fixed on the table. It is not possible neither to fix two or more parts on the table nor use two or more tables at the same machine. Thus, in every moment only one part can be present on such a machine. No part can be loaded before the previous part is not finished. In today's market the customer demands the product of right quality, right quantity, right cost, &at right time. [1] Therefore it is necessary to improve productivity as well as quality. One way to achieve this is by using multi spindle drilling head. Another way of achieving good quality during production is to use the statistical quality control techniques at every stage of production. If the production is statistically under control the process can continue and there is no need for a change in the process. There are various methods of multi spindle drilling head are: A. Adjustable multi spindle drilling head can be used in many components, where change the center distance to some range. 1) It will increase drilling capacity in single special purpose machine. 2) These are the gear adjustable center drilling head, in which drill Spindle is fitted on slotted plate and the gear is mounted on the drill spindle. 3) By changing the gears as per required pitch circle diameter the drill spindle is adjusted in the slotted plate. B. Fixed Multi spindle drilling head where cannot change the centre distance to some range. Is planetary gear train, compound gear train