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Working principle of slow wire processing

 Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much bett...

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form o...

Hydrostatic guideway of CNC machining lathe

The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state.   CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200   beryllium   copper   and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form o...

The Difficulties in Cutting 304 Stainless Steel – China CNC Will Give You the Best Solution

Stainless steel is difficult to process mainly due to the poor thermal conductivity of stainless steel, and the heating of the chip material will easily form a buildup on the tip of the tool, which is the main cause of damage to the blade. In addition, because of the large cutting force and high cutting temperature during processing, it brings some difficulties to the processing, and it is often difficult to achieve satisfactory results when cutting.

We learned from a engineer who has been in business for 40 years that there are also some tips for stainless steel processing. Let's share the difficulty of stainless steel cutting today !

Stainless steel cutting tips

Table of Contents

  1. the blade Angle of the cutting tool must be 0, and it can be ground on a tool grinder if possible, This is the most important point. Because when 304 stainless steel is cutting, the chips and the groove wall friction are serious, If the chips cannot be rolled out vertically, chip squeezing will occur, and the knife will be hit in severe cases. When the blade inclination angle is large, the effect of chip splitting measures is not ideal.
  2. The arc radius of the tool tip should not be too large, the auxiliary rear Angle of the tool is easy to wear when it is too large, It may be because the chip thickness at the arc is reduced, which is easy to produce hardening and aggravate the wear of the tool side.
  3. Tool wear should be sharpened in time. The grinding standard of 304 stainless steel cutting knife, not only should it be determined according to the main rear, but also pay special attention to the degree of wear on the auxiliary rear, If the auxiliary back is worn too much, the friction between the tool and the groove side will increase, causes the groove width to narrow, making it difficult to discharge the chips, and accelerating tool wear.
  4. The front surface roughness of the tool should be reduced as much as possible, the surface roughness value is low, which can reduce bonding wear and the cutting force, and cutting lightly. practice has proved that the tool front after grinding than without grinding tool life significantly improved.
  5. The cutting edge is ground with a negative chamfer of about 0.2mm, which can reduce the chipping phenomenon during grinding and obtain a better cutting edge quality. The lower part of the knife body adopts a fish belly shape to increase rigidity. The clearance angle of the tool pair is externally ground with a grinding wheel, and the rigidity is better. The actual clearance angle is about 2°~3°. The tool material for processing 304 stainless steel is generally selected from YG alloy which is not easy to bond and wear with it. I chose YG8 with better strength. The tool width is selected according to the diameter of the bar. The cutting speed is about 60m/min.This tool can meet the needs of general processing. The bar material of φ40~φ80MM can be cut at one time. There is no need to drive the knife around. Pay attention to the sharp stainless steel chips during processing. If the chips are too long, the knife must be retracted to break the chips. To avoid danger, the tool should not stay on the surface of the workpiece when retracting, to reduce work hardening. When cutting a solid workpiece, in order to avoid the tool from breaking, when cutting to the center, you can leave about 1~2mm to break it by hand.
  6. For this kind of stainless steel cnc milling, under normal circumstances, wet cutting is several times longer than dry cutting tool life. The mainly is speed and cutting knife. If the speed is high without adding water, the chips from the cutting knife will be red immediately. It will be clear after processing a few activities!

Keywords:

cnc milling parts manufacturers,cnc milling suppliers,aluminum parts manufacturing,oem casting parts,cnc spare parts suppliers,diy cnc parts,cnc milling machine parts components,diy Cnc Machine parts,precision turned parts china,turned parts

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