Tapping Mode

1. Way classification by tapping feed

(1) manually tapped Act (automatic introduction of Law)
In this manner, in addition to the beginning to be applied in a certain axial force, so that the taps can cut into the workpiece, in the subsequent process of tapping, only the taps or workpiece for a forced rotational movement, and without forcing in the axial direction feed motion, taps that can automatically axially introduction, thus processing the thread. Applicable to the general accuracy of the thread processing.

(2) Motor tapping method

① Elastic tapping
Elastic tapping is feed with axial compensation law. Can tap collets rigid gripping, tapping chucks can also be used - that transfer torque to tap the square head, floating clamping cylindrical shank from the positioning. Either way, the fixture is required with axial compensation function to compensate for feed in the feed and tap pitch does not match the error (about 4%). Tapping process, the tap is only in the early to begin cutting the 3 to 6 revolutions within the feed cut, cut depth increases as well as the strengthening of the role of axial compensation, the tap will gradually own transition to the introduction of state on their own.

② Rigid tapping
Rigid tapping: about to tap collets rigid gripping the tapping two forms: a) clamping tap cylindrical shank and square head positioning, b) only gripping cylindrical shank of the tap. The feed amount in the entire tapping process is strictly equal to the pitch, and the thread processing. Rigid tapping by reducing the influence of the axial force, to improve the machining accuracy of the thread, for the precision threaded processing situations. Because the feed amount and pitch in the entire tapping process is strictly equal to the harsh conditions, so this method is suitable in the processing center of the tapping command G84 (FANUC system, for example) on the implementation, there are a small amount of machining center because no tapping instruction can not be used, there are some limitations.

2. Classification by tapping direction

(1) the axis vertical tapping - tap (machine and tapping fixture) with a horizontal plane perpendicular to the processing state. : The bench drilling machine, vertical drilling machine, Drilling & Tapping on the bench drill, desktop tapping machine, vertical milling machine, vertical machining center, and other equipment. Should be adopted in order to achieve the best cooling and lubricating effect and easy chip removal, vertical tapping.

(2) Horizontal axis tapping - tap (machine and tapping jigs), and parallel to the horizontal surface of a processed state. Tapping in lathes, multi-spindle automatic lathes, CNC lathes, horizontal milling machine, horizontal tapping machine, horizontal machining center equipment, fall into this category.

3. Classification by tapping Taps stress
(1) Ordinary tap - work under stress.

(2) The Broaching Taps - work withstand tensile stress, bending the tool to do very long to avoid tool pressure. Large size, pitch thread, for example, trapezoidal thread, broaching Taps, usually at a stroke will thread processing molding, without having to use a group of different diameters Taps, greatly improving production efficiency. Compared with the Turning structure Taps, the broaching Taps production efficiency of about 4 to 12 times, thread durability can also be increased by 2 to 3 times.

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