What is tapping in the Automatic Tapping Lathe Machine?

Tapping in the Automatic Tapping Lathe Machine refers to the process of creating internal threads in a workpiece. It involves using a tapping tool, also known as a tap, to cut threads inside a pre-drilled hole. Tapping is a common machining operation used to produce threaded holes that can accept screws, bolts, or other threaded fasteners.

The process of tapping in the Automatic Tapping Lathe Machine generally follows these steps:

Prepare the Workpiece: The workpiece is mounted securely in the lathe's chuck or other holding fixture. The workpiece should be centered and aligned properly.

Drill a Hole: Before tapping, a hole must be drilled in the workpiece at the desired location and with the appropriate diameter for the thread size to be tapped. The hole should be properly sized to accommodate the tap.

Select the Tap: Choose the appropriate tap for the thread size and pitch required. Taps come in various shapes and styles, including hand taps, machine taps, and spiral-point taps.

Set Up the Tap: The tap is mounted onto the lathe's tailstock or a tapping attachment. The tap should be aligned with the hole to ensure that the threads are cut accurately.

Engage the Tap: The lathe's spindle is rotated slowly while the tap is advanced into the hole. The cutting edges of the tap will gradually cut threads into the walls of the hole. The lathe's lead screw can be used to synchronize the rotation of the workpiece with the feed of the tap.

Control Speed and Feed: The speed of rotation and the feed rate of the tap should be carefully controlled to ensure proper thread cutting without causing damage to the tap or the workpiece. The choice of speed and feed depends on factors like the material being tapped and the tap's size and type.

Back Off and Clean: Once the tap has reached the desired depth, it's backed off by reversing the lathe's spindle rotation. The tap is then removed from the hole, and any chips or debris are cleaned from the hole.

Inspect Threads: After tapping, the threads should be inspected for accuracy, proper depth, and quality. Thread gauges can be used to verify the dimensions of the threads.

Tapping in a lathe machine is a precision operation that requires careful setup and control. It's commonly used in industries like automotive, aerospace, manufacturing, and general metalworking to create threaded holes for a wide range of applications.