Consistent is to avoid excessive wear on the blade side and shorten tool life as much as possible.
d2 -- Middiameter A -- Blade Angle is usually determined by the pad of the indexable thread turning tool. The standard tool is +, but for 16mm and 020mm diameter internal thread tools, there is no spacer due to small space. , so the blade Angle is greater than +2° can not be processed.
The feed mode of thread turning is determined by the cutting machine, workpiece material, blade geometry and pitch of the thread being machined. There are usually the following four feeding methods: the common cutting method, the left and right sides of the turning tool cutting at the same time, the axial cutting force offset, partly overcome the turning tool phenomenon caused by the axial cutting force deviation. Uniform wear on both sides can ensure clear tooth shape, but there are problems such as poor chip removal, poor heat dissipation and stress concentration. Suitable for threads with cutting pitch less than 1.5mm. D Single feed tool and radial feed at a certain Angle. The chips roll off the blade to form a strip for better heat dissipation. The disadvantage is that the friction part is not cut and the other side becomes hard. D Single side feed direction 30° Angle feed cutting.
Both sides of the cutting edge are cut to form chip rolling, chip removal is smooth, heat dissipation is good, and thread surface roughness is low. In general, this is the best way to turn stainless, alloy, and carbon steels. Approximately 90% of threaded materials use this method. It is best to thread in this way on a CNC lathe. Generally can be called fixed loop, simple programming. Both sides of the cutting edge are cut to form chip rolling, chip removal is smooth, heat dissipation is good, and thread surface roughness is low. In general, this is the best way to turn stainless, alloy, and carbon steels.
Approximately 90% of threaded materials use this method. It is best to thread in this way on a CNC lathe. Generally can be called fixed loop, simple programming. Both sides of the cutting edge are cut to form chip rolling, chip removal is smooth, heat dissipation is good, and thread surface roughness is low. In general, this is the best way to turn stainless, alloy, and carbon steels. Approximately 90% of threaded materials use this method. It is best to thread in this way on a CNC lathe. Generally can be called fixed loop, simple programming.
Left and right side feed alternating cutting, that is, each radial feed, left or right lateral movement of a certain distance, so that only one side of the tool involved in cutting. This method is generally used for general purpose lathes and thread processing above the middle distance of 3mm, and it is more complex to program on CNC lathes.
Thread milling is mainly used in CNC milling and boring machines such as machining centers. Generally small diameter internal thread (20mm) can be tapped processing. However, there are many problems with tapping and sleeve threads for the processing of large diameter internal and external threads. Therefore, medium iron cutting is the best processing method.
Thread milling is different from thread turning. This is because the pattern CNC milling is mainly through the machine tool of three axis linkage and spiral interpolation processing to achieve, that is, in the processing of two axis arc sensitive cutting at the same time, the first is the three axis of the feed movement. The axial travel distance is milled. This is a single edge milling process. Therefore, the best feed mode is to use radial direct feed cutting mode, so that the two cutting edges are cutting at the same time, the force is more uniform. Can ensure the precision of thread, and CNC programming is relatively simple.
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