Manufacturing method of milling cutter

Abstract

The invention discloses a manufacturing method of a milling cutter. The manufacturing method of the milling cutter comprises the following steps: 1) performing cylindrical grinding on coarse steel; 2) performing heat treatment on blanks: performing low-temperature preheating at 555 to 565 DEG C and preserving heat for 2 hours, performing medium-temperature preheating at 855 to 865 DEG C and preserving heat for 20 minutes to 25 minutes, performing high-temperature heating at 1,295 to 1,305 DEG C and preserving heat for 110 seconds to 125 seconds, tempering for the first time at 560 to 575 DEG C for 2 to 3 hours, preserving heat for 2 to 3 hours and performing air cooling to room temperature, tempering for the second time at 560 to 575 DEG C for 2 to 3 hours and performing air cooling to room temperature, and tempering for the third time at 560 to 575 DEG C for 2 to 3 hours and performing air cooling to room temperature; 3) performing acid-washing treatment; 4) rolling a groove; 5) grinding cylindrical burrs; 6) annealing; 7) performing coarse cylindrical grinding; 8) edging; 9) performing fine cylindrical grinding; 10) performing surface treatment; 11) placing into engine oil, cooking for 6 hours and performing air cooling to room temperature; and 12) coating anti-rust oil to manufacture the finished product milling cutter. The milling cutter manufactured by the method is sharp and can be applied to fine machining.

Description

technical field [0001] The invention relates to a method of manufacturing a milling cutter. Background technique [0002] The current milling cutter consists of a spiral groove part and a shank. The general milling cutter is formed by rolling. The rolling drill is to extrude the spiral groove by heating the bar with a roll. The advantage is that the production efficiency is high, and the material after hot rolling The fiber is not cut, the physical properties of the finished product are good, the raw material is saved and the consumption of the grinding wheel is saved. The disadvantage is that the surface roughness of the spiral groove affects chip removal, the geometrical formation of the spiral groove section is poor, and the precision is low. The symmetry of the two spiral grooves often does not meet the standard. Scrapped and can only be used for rough machining. With the improvement of machining requirements, although rolling drills have the advantages of good physical ...

AI Technical Summary

Problems solved by technology

[0002] The current milling cutter consists of a spiral groove part and a shank. The general milling cutter is formed by rolling. The rolling drill is to extrude the spiral groove by heating the bar with a roll. The advantage is that the production efficiency is high, and the material after hot rolling The fiber is not cut, the physical properties of the finished product are good, the raw material is saved and the consumption of the grinding wheel is saved. The disadvantage is that the surface roughness of the spiral groove affects chip removal, the geometric formation of the spiral groove section is poor, and the precision is low. The symmetry of the two spiral grooves often does not meet the standard. It can only be used for rough processing. With the improvement of processing requirements, although the rolling drill has the advantages of good physical properties, high durability and low manufacturing cost, it will be gradually eliminated due to poor precision.