スレッドミルの動きを上から下にしたい。【threadpro（スレッドプロ）】 | オーエスジー

I want to move the thread mill from top to bottom. [ThreadPro]

When using ThreadPro, an NC program creation tool for thread mills, you can do the following.

In the case of right-hand screws...

With right-handed (right-handed) cutters, you can specify the tool movement from top to bottom with the upcut selection.

In the case of left-hand screws...

With right-handed (right-rotating) cutters, you can specify the tool movement from top to bottom with the downcut selection.

・We will introduce the movements performed by Thread Pro from the following.

To make the tool movement go down from top to bottom, you need the following information:

(1) Right Thread or Left Thread

(2) The tool to be used is a right blade (used with right-hand rotation) or a left blade (used with left-hand rotation).

(3) Down cut or up cut

・Operation procedure in ThreadPro

Set (1)

First, you will be asked to enter the information of the screw you want to process (name, pitch, thread length, etc.). In that case, please select the right thread or the left thread.

Set (2)

Next, you will be asked to select the tool you want to use. Many OSG thread mills are right-edged.

Some of them are left self-centered with a tip interchangeable holder (= used with left rotation of the spindle. The holder model number is written as -LH. ), and a thread mill AT-2 (left blade specification) for high-hardness steel.

Set (3)

In addition, enter information about the movement of the selected tool on the next screen.

In Thread Pro, you just need to choose a down cut or an up cut here.

In comparison with the information you have entered so far, the movement of the tool is displayed in an easy-to-understand diagram.

To specify the movement of the tool from top to bottom, you must have the following combinations:

For right-hand thread

Right Blade (Tool Right Rotation) & Upcut

For left-hand screws

Right Blade (Tool Right Rotation) & Down Cut

▽Relationship between up-cut and down-cut and tool movement

The thread on the blade of the planet cutter does not have a lead like a tap. Led threads can be machined by sending a tool mounted parallel to the axis of the pilot hole in a rotation (spindle rotation) and an orbit (helical cutting feed) motion, as well as one pitch split axis between revolutions. Since helical cutting is performed by moving the X, Y, and Z axes simultaneously, it is a prerequisite for using a planet cutter that the machining machine is equipped with an NC (numerical control unit) with simultaneous control of three axes and helical interpolation functions. Right-hand, left-handed, up-cut, and down-cut are determined by a combination of orbital and axial feeds. In general, up-cut is superior in terms of finishing surface, while down-cut is superior in terms of tool life. In addition, in the machining of blind holes where there is no room for pilot holes, the tool is sent in the direction of extraction from the pilot hole in order to prevent the chips generated by internal threading from pressing on the bottom of the hole with the tool end face.

Internal thread processing principle

	Inner Diameter Right Thread		Inner Diameter Left Thread
Tool rotation direction Cutting Feed Direction	Street hole up cut	Blind Hole Down Cut	Street hole down cut	Blind Hole Upcut

In addition, the insert-type left-handed holder and the thread mill AT-2 for high-hardness steel are left-bladed.

In that case, the following combinations will be used:

For right-hand thread

Left Blade (Tool Left Rotation) & Down Cut

For left-hand screws

Left Blade (Tool Left Rotation) & Up Cut

Reference code

spindle clockwise rotation M03

spindle counterclockwise rotation M04

Axis Travel Clockwise (Arc Interpolation)G02

Axial Movement Counterclockwise (Arc Interpolation) G03

Diameter correction works on the left side of the direction of travel G41

(If the spindle rotates to the right, it is a downcut.) If the spindle rotates to the left, it is an upcut. ）

Diameter correction works to the right with respect to the direction of travel G42

(If the spindle rotates to the right, it is an upcut.) If the spindle rotates to the left, it is a down cut. ）