Machining process of milling cutter with ultrathin slice

Abstract

The invention relates to a machining process of a milling cutter with an ultrathin slice. The technical scheme is that the process includes that after blanking, two planes are turned flat, inner holes are drilled, and a gauge is plugged according to milling allowance; an excircle is turned, the outer diameter of the excircle is 3mm larger than that of the milling cutter, a plane is finish turned, and a marking ring is arranged; thermal refining is conducted to reach HRC 28-32, grit blasting is conducted on the surface, and two planes are milled with the plane with the marking ring as the standard; a tyre stringing rod is used for turning a profile, burrs are removed, and the profile is roughly shoveled; hot quenching and tempering are conducted to reach HRC63-66; grit blasting and blueing are conducted on the surface; a keyway and a tooth form are cut in a linear mode; the two planes are evenly and repeatedly milled to the thickness of 0.05-0.08mm, and nonparallelism is kept to be not larger than 0.03 mm; the plane is milled to reach the thickness meeting a size requirement; the inner holes are milled to reach the size, and the relative plane verticality is kept to be not larger than 0.03 mm; the profile and a rear corner are shoveled finely, a front blade is milled, and tooth height difference of teeth is kept to be not larger than 0.05 mm; and lateral rear corners and entad corners on two sides are milled. By means of the process, the precision and planeness of the milling cutter can be guaranteed.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a processing technology of an ultra-thin chip milling cutter. Background technique [0002] The processing of ultra-thin and large-diameter sheet milling cutters has always been a difficult problem in the field of milling cutter processing. Such as figure 1 As shown, due to the structural characteristics of the ultra-thin large-diameter chip milling cutter itself, the diameter is relatively large, about Φ220mm, and the blade width is narrow, about 5mm, which determines its difficulty in the processing process. , easy to bend and deform, resulting in edge chipping and serious damage to the tool; whether it is cold processing or hot processing, it is very easy to produce scrap, and the scrap rate is high; The shape requirements are relatively precise, it is difficult to control, and the parallelism of the two sides of the tool is not guaranteed, etc. These problem...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, due to the structural characteristics of the ultra-thin large-diameter chip milling cutter itself, the diameter is relatively large, about Φ220mm, and the blade width is narrow, about 5mm, which determines its difficulty in the processing process. , easy to bend and deform, resulting in edge chipping and serious damage to the tool; whether it is cold processing or hot processing, it is very easy to produce scrap, and the scrap rate is high; The shape requirements are relatively precise, it is difficult to control, and the parallelism of the two sides of the tool is not guaranteed, etc. These problems will cause poor quality of the tool and waste products, which will greatly hinder the production and seriously affect the control of the production process and processing costs.

In order to reduce bending deformation in existing processing methods, fixtures are made for clamping when milling the tooth shape, so as to prevent stress concentration caused by milling force and damage to the cutter body, fixtures are also used during heat treatment, quenching and tempering Reduce the deformation caused by the thermal process, but in actual operation, the tooth profile often breaks. This is because the tooth profile becomes thinner after milling the tooth profile, and waste products will appear during precision machining

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