Because of the small shape tolerance, the forming cemented carbidemilling cutter is widely used, because it can not replace the blade directly, and most of the milling cutters are used for scrap treatment, which greatly improves the processing cost

Processing of materials properties. In the process of cutting titanium alloy, due to the poor thermal conductivity of titanium alloy, cutting easy bonding formed in the tip edge or near the built-up edge, in the vicinity of the tool tip, the formation of high temperature on the tool flank, red hardness loss, increased wear. Under the condition of high temperature continuous cutting bonding material and weld materials, by the impact of the subsequent processing, after being forced off the process will take away part of the tool material, tool and defect caused by damage. In addition, when the cutting temperature reaches 600 degrees above, parts of the surface will form a hardening layer, tool produced strong wear elastic titanium alloy. Low modulus, elastic deformation, close to the flank at the surface of the springback, so the machined surface and the flank of the contact area is large, serious wear.

According to normal wear. In the normal production process, when the margin of continuous milling titanium alloy parts at 15mm-20mm will appear serious abrasion of the cemented carbidemilling cutter. The milling efficiency to very low, and the surface finish is poor, can not meet the production and quality requirements.

Improper operation. The production and processing of titanium alloy castings, a box body and a box cover in the process of clamping is not reasonable, not suitable for cutting depth, spindle speed too fast, inadequate cooling improper operation will cause tool tipping, breakage, broken and so on. This kind of defect in milling cutter can not effectively milling, but also in the milling process for "eating knife" caused by concave surface defects such as surface processing, not only affects the processing quality of the milling surface, even cause parts scrapped.

The improved method. The cutting edge chipping (i.e. mild damage) the most common case, only through the cutting edge grinder grinding out the damaged part, reuse can be realized. The cemented carbidecutter grinding cemented carbidecutter should use silicon carbide grinding wheel, and can not be dipped in water or by grinding, cemented carbidequench cracking and completely scrapped.

After grinding grinder, effective length after grinding tool than the new tool without the use of short, but this process indirectly enhance the rigidity of the cutting tool, the processed surface quality better, improve the milling efficiency. Because titanium alloy casting molding will be formed after the uneven skin is hard and brittle, easily cause chipping phenomenon the crust has become one of the most difficult, removal of the titanium alloy processing in the process. Recommend appropriate to increase the depth of rough machining first took the knife when the (2mm-4mm), to control the tip in the surface crust is appropriate, to prevent direct contact of the tip or tipping phenomenon.

Posted by: hannahgwendolyn at 09:34 AM | No Comments | Add Comment
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