![]() ![]() ![]() I) The machine tool should be strong enough to drill a hole in the workpiece, otherwise, the parts may be deformed due to the cutting force generated. The precautions which should be followed while using the drilling machine are as follows: Improper use of the drill machine can cause serious injury to the operator. Safety is the most important factor that should be taken care of while using a drill machine to avoid any kind of harm to the operator. L=(H+X) = (H+ 0.29D) Precautions which should be used in drilling Machine: In an open hole, the total length is equal to.The equation for calculating the total length is different for an open hole and blind hole: The length of the approach(X) is taken as 0.29D.In a Drilling operation, the length of the approach is taken into account for calculating the length or the depth of the hole. The machining time in drilling can be calculated by the following By using the highest possible feed rate the best tool life for a given tool can be obtained.The amount of the metal removed is a function of the cutting speed and the feed.The feed range varies from 0.05 to 0.35mm. The feed can be defined as the distance moved by each rotation of the drill bit into the workpiece. The basic function of the handwheel is to adjust the spindle position as per the requirement. Drill bit:Ī drill bit is an actual cutting tool that is used to create a hole in the workpiece. The basic function of the chuck is to hold the cutting tool firmly. Chuck:Ĭhuck is present at the bottom of the spindle. The bottom of the spindle is connected to the chuck. The top of the spindle is attached to one of the stepped pulleys. Spindle arrangement is present at top of the column opposite to the arrangement of the motor. The basic function of the stepped pulley is to control the speed of the rotation of the motor. Out of these two, one pulley will be in an upward direction while the other pulley is inverted.Īlways both the pulleys will be there in the opposite direction. Two steeped pulleys are present on either side of the column at the top. The inside motor shaft is there which is connected to a stepped pulley so that we can increase or decrease the speed of the rotation of the motor. ![]() The motor is present at the top of the column. A table can be adjusted at any angle as per the requirement. The table is attached to the column and it can be rotated around the column and can have an upward and downward moment. The table is the place where the workpiece is being mounted. The pillar helps the motor and the spindle head. A pillar is present at the center of the bed. The pillar is a type of vertical column that rests on the bed. The bed is made up of cast iron, so it has high compressive strength and good wear resistance. The bed is the main part of the machine on which the whole machine is being mounted. To perform boring action by a machine a special holder for the boring tool is required. Basically, Boring is a process in which the holes are enlarged that are already being drilled or cored. In the lathe machine, the workpiece rotates and the drilling tool is held stationary in the tailstock.īoring: When we talk about drilling, boring is mostly discussed. Drilling operations can also be performed on Lathe machines. Drilling Machine Definition:Ī drilling machine is a type of machine in which the holes are being made on the workpiece by making use of a rotating tool called drill bit or the twist drill.ĭrilling is basically a technology of creating holes. Now the electric drills are available in a variety of sizes and forms. Present-day electric drills have gone a long way. Inventor: Close to the end of the 18 th century Arthur James Arnot and William Blanch’s brain invented the electric drill machine. Bow drill was used for woodwork, stonework, and dentistry. ![]() Similarly, in the past, the Homo sapiens used a rock with pointed edges which they use to spin in between their fingers, and with the other hand, they would hit it so as to create a hole.Īs time passed developments were done on the drilling and the BowDrill is considered as the first drilling machine. Drilling Machine History:ĭrilling is a technology used a long time back in our past. It basically means to create a hole by making use of a tool. Drilling is basically a single-purpose machine tool as its main purpose is to make holes in the workpiece.Ī machine consists of a spindle that provides rotary motion to the drilling tool, which finally makes the hole in the job (workpiece). How to obtain high accuracy in Drilling Machine:ĭrilling Machine is the simplest, moderate, and most accurate machine tool used in almost all the production shops and tool rooms.Precautions which should be used in drilling Machine:.Cutting Speed, Feed, and Machining Time of Drilling Machine:. ![]()
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