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How do we deal with the deformation of titanium alloy milling cutter in the processing of aluminum alloy parts?
Release time:
2022/11/10
titanium alloy milling cutterIn order to provide better heat dissipation conditions and avoid heat concentration during processing of titanium alloy milling cutter, symmetrical processing should be adopted. If a 90mm thick plate needs to be processed to 60mm, if one side is milled immediately and the other side is processed to a size at one time, the flatness reaches 5mm; If repeated feed symmetrical processing is adopted, each side is processed twice to the size, and the flatness can reach 0.3mm.
Parts with multiple cavities
Titanium alloy milling cutter processing should not be used in the order of a cavity a cavity processing method, easy to cause uneven force and deformation of parts. Multi-layer processing is adopted, each layer is processed to all cavities as much as possible at the same time, and then the next layer is processed to make the parts evenly stressed and reduce deformation.
By changing the cutting parameters
titanium alloy milling cutterAmong the three elements of cutting amount, the cutting amount has a great influence on the cutting force. If the machining allowance is too large, the cutting force of one pass will not only deform the parts, but also affect the rigidity of the machine tool spindle and reduce the durability of the titanium alloy milling cutter. If the amount of knives is reduced, the production efficiency will be greatly reduced. High-speed milling in CNC machining can overcome this problem. At the same time, by increasing the feed rate and increasing the machine speed, the cutting force can be reduced to ensure the processing efficiency.
Pay attention to the order of cutting
The roughing of titanium alloy milling cutter emphasizes the improvement of machining efficiency and the pursuit of cutting rate per unit time. Generally, reverse milling can be used. That is, the excess material on the surface of the blank is removed at a fast speed and in a short time, and the geometric contour required for finishing is basically formed. Finishing emphasizes high precision and high quality, and milling should be adopted. As the cutting thickness of the titanium alloy milling cutter teeth gradually decreases from a large value to zero, the degree of work hardening is greatly reduced, and the degree of deformation of the parts is also reduced.
Thin-walled workpiece machining
Because of the deformation caused by clamping, the finishing of titanium alloy milling cutter is inevitable. In order to minimize the deformation of the workpiece, you can loosen the pressure block before finishing, reach the size, let the workpiece freely return to its original state, and then gently press it to make it just clamp the workpiece (completely by hand), which can achieve the ideal processing effect. In short, the point of action of the force is good on the supporting surface, and the force should act in the direction of good rigidity of the workpiece. Under the premise of ensuring that the workpiece is not loose, the smaller the force, the better.
When machining parts with cavities
When machining the cavity, try not to lettitanium alloy milling cutterDirectly plunging into the part like a drill bit will cause the milling cutter to have insufficient chip space, poor chip removal, overheating, part expansion, tool breakage, etc. Drill holes with a drill bit of the same size or larger than the titanium alloy milling cutter, and then mill with a milling cutter. Alternatively, the spiral cutting program may be generated by the CAM software.
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