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Thread Screw Milling Method

Thread Screw Milling Method
With the progress of the times, and medium-sized CNC machining industry  increasingly widespread industrial use, a number of large parts of the thread processing, the traditional thread turning and Taps, Screw chaser unable to meet production needs. In the CNC milling machine or machining center is widely used today, with three-axis machine tools for threading linkage to change the thread processing method, and achieved good results.

First, the hole spiral milling

1. Working range

Larger diameter blind hole or through hole, the process is too slow or can not twist processing, tend to choose the way helical milling. And because of the way the end of the selected tool without the blade, so more suitable for small depth of cut, high speed and large feed processing conditions.

2. Processing features

Helical milling spiral hole is built on the basis of the knife method of processing methods, there is a screw hole milling characteristics: helical milling per week, the Z-axis direction of the tool under the knife of a highly mobile.

3. Thread cutter selection

Select φ16mm translocation of the three cutter blade, tool speed S = 3000r/min, feed rate F = 2500mm/min.

4. Instruction

This approach on the hole in the spiral milling is quite distinctive, the essence of its programming is a highly under the knife as a subroutine compiled helix height, the circulation of the spiral subroutine call, to complete the hole milling. This method is not processed hole cutter specifications and other factors, so the CNC milling machine and machining center applications is ideal.

Second, single-blade screw thread milling

1. Working range

To either the same thread milling cutter for left hand thread and right hand thread milling, thread internal rotation of both milling and can external thread milling, while not subject to the impact of pitch and thread size.

2. Processing features

Single-thread cutter blade, processing is based on the spiral approach under the knife on the basis of processing methods. Thread milling principle is: thread milling cutter every week, tool movement in the Z axis of a lead (when a single pitch).

3. Thread cutter selection

Select a single 16mm thread cutter blade, tool speed S = 1800r/min, feed rate F = 300mm/min.

4. Instruction

This method is useful in the thread milling on the characteristics of the substance of its programming is to lead the spiral of a compiled a subroutine, by repeatedly calling the subroutine for processing spiral, you can complete the whole thread milling. Processed by this method is not thread pitch and thread milling parameters of specifications, so CNC milling machine and machining center are widely used.
Third, the multi-blade screw thread milling

1. Working range

To either the same thread mill can also be left hand thread milling milling right hand thread, but can also internal and external thread milling, is mainly used in the production of high efficiency applications.

2. Processing features

Each cutter has a Rprg value to the programmed value is the tool radius, that is, when thread milling cutter radius compensation value. Thread milling, the average depth of processing can be completed once processed, but if required in multiple milling, cutter radius compensation value as long as the changes can be completed.

3. Thread cutter selection

Thread milling is generally greater than the effective length of 20mm, 1.5mm pitch thread, multi-blade cutter, cutter speed S = 1200r/min, feed rate F = 100mm/min.

4. Instruction

This method when the thread milling efficiency is very high, programming is very simple. The essence of its programming: Thread Mills in the XOY plane import (or export) 1 / 4 weeks, the official processing thread 1 week; in the Z axis to import (or export) 1 / 4 weeks, the tool to run 1 / 4 pitch the formal processing thread 1 week, the tool is running in the Z axis pitch 1. Thread cutter blade by ensuring more effective on each milling cutter in the same time to complete the whole thread milling. This method is the focus of processing reflected in the choice of thread pitch on the cutter: When asked how much processing the thread pitch, you must select the corresponding thread cutter. At the same time, the method by the pitch and thread milling specifications and other factors, but because of processing efficiency, so the CNC milling machine and machining center applications on a wide range of

 


 

 

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