International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
“ FABRICATION OF COMBINE DRILLING AND TAPPING MACHINE ” N.U. Kakade1, Piyush Bhake2,Sumit Dandekar2 ,Rohan Kolte2 , Sumit Selokar2 1.Assistant Professor, Department of Mechanical Engineering;Dr. Babasaheb Ambedkar College of Engineering & Research, Wanadongari, Nagpur – 441110, Maharashtra. INDIA. 2.B.E, Department of Mechanical Engineering, Dr. Babasaheb Ambedkar College of Engineering & Research, Wanadongari, Nagpur – 441110, Maharashtra. INDIA. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Tapping and drilling are frequently used in
1.2 TAPPING PROCESS:
mechanical working. Previous researches on tapping and drilling has mainly focused on cutting force variations, drill and tap wearing, and drill and tap design.A novel performance test system of tapping and drilling for a computer numerical control (CNC) machine tool is established in recent techniques. The target of the mass production is to increase the productivity and increase the accuracy. This is done by reducing the set up cost and manual fatigue. Trial and error method is usually practiced until the axis of the hole is properly aligned with the axis of the drill. In such a situation a lot of time is being wasted to maintain the accuracy. Eventually it increases the operator’s fatigue. The main aim is to locate, hold and support the work securely so that the required drilling and tapping operation can be performed. Our machine will consist of combination of drilling and tapping operation with the help for speed reduction gear box. As drilling requires high RPM and tapping requires low RPM to perform the drill and internal threads operation. A collect is mounted vertically on the shaft of motor and gear box reduces the speed as per requirement of operation.
Tapping is the operation of cutting internal threads in a hole using a cutting tool called Tap. A tap has cutting edges in the shape of threads. When the tap is screwed into a hole it removes metal and cuts internal threads for tapping the hole drilled will be smaller than the tap size. Tap drill size = 0.8 * Outer diameter of the threads To understand the application and importance of the involvement of semi automation in conventional drilling machine in manufacturing. This paper will cover up procedures for maintaining and setting up the work, proper methods of selecting tools, work holding devices to get the job
2. CONSTRUCTION AND WORKING Column: The column is the vertical member of the machine,
Key Words: DRILLING , TAPPING
which supports the table and the head containing all the driving mechanism. The Column should sufficiently, rigid so that it can take up the entire cutting
1.INTRODUCTION
Table: The Table is mounted on the column and is provided with ‘T’ bolts for clamping the work directly on its face. The table is made as a rectangular in shape. the table moves up and down over the column of the machine. The top of the table is machined and is used for holding work pieces. It is made of Cast Iron.
A process for producing internal threads using a tool (tap) that has teeth on its periphery to cut threads in a predrilled hole. Drilling is a cutting process that uses a drill bit to cut a hole of circular cross-section in solid materials The main purpose of this machine is to perform both drilling and tapping operation on single machine .This machine will consist of combination of drilling and tapping operation with the help for speed reduction gear box. As drilling requires high RPM and tapping requires low RPM to perform the drill and internal threads.
Motor: It is a 1 Phase 0.5 H.P. Motor and runs at 1320 rpm & is mounted on the bracket.
V-Belts: A single V-Belt of A-Type cross section is used. It is used to transmit the power from Motor Pulley to Spindle Pulley with help of step cone pulley.
1.1 DRILLING PROCESS :
Worm and worm gear : It consist of Worm with 4 teeth
The drilling machine is one of the most important machine tool. In a drilling machine holes may be drilled quickly. The holes is generated by the rotating edge of a cutting tool known as the drill which exerts large force on the work clamped on the table. As the machine exerts vertical pressure to originate a hole it is also called as a “Drill Press”.
and Worm gear with 30 teeth
Bevel gear : The bevel gear arrangement is used to transmit motion in right angle to main spindle . It consist of 16 teeth on each gear.
Sleeve arrangement : The sleeve arrangement is provided for locking (connecting and disconnecting) system between main shaft and power transmitting shaft.
© 2017, IRJET
|
Impact Factor value: 5.181
|
ISO 9001:2008 Certified Journal
|
Page 305