CN-121972714-A - Milling cutter with differentiated cutting edge passivation parameters and machining method

CN121972714ACN 121972714 ACN121972714 ACN 121972714ACN-121972714-A

Abstract

The invention provides a milling cutter with differentiated cutting edge passivation parameters and a processing method. The milling cutter comprises a passivation radius of the cutting edge close to the rear cutter surface, wherein the passivation radius of the cutting edge close to the front cutter surface is not equal to the passivation radius of the cutting edge close to the rear cutter surface, the passivation radius of the cutting edge close to the rear cutter surface or the passivation radius of the cutting edge close to the front cutter surface is smaller than 0.05mm, the length of a passivation area of the rear cutter surface along the cutting edge direction accounts for 60% -85% of the total length of the cutting edge of the rear cutter surface, and the length of the passivation area of the front cutter surface along the cutting edge direction accounts for 60% -90% of the total length of the cutting edge of the front cutter surface. When the passivation radius of the cutting edge close to the rear cutter surface is increased and the passivation radius of the cutting edge close to the front cutter surface is reduced, the proportion of the lengths of the passivation areas of the front cutter surface and the rear cutter surface along the cutting edge direction to the total length of the cutting edges of the front cutter surface and the rear cutter surface is regulated so that the rear cutter surface can be better contacted with a workpiece. Otherwise, the length of the passivation area of the front and rear cutter faces along the cutting edge direction is regulated and controlled to occupy the total length of the cutting edges of the front and rear cutter faces, so that the front cutter faces can more effectively promote chip removal. According to the invention, the differential requirements of the front tool face and the rear tool face on performances of various processing scenes can be met.

Inventors

LIU CHANGXIA
SUN JUNLONG
SUN YIFA
HAN HUA
SHEN YUQI
LIN BAN
SUN XIAOBING
LIU YAN

Assignees

鲁东大学

Dates

Publication Date: 20260505
Application Date: 20260203

Claims (7)

1. A milling cutter with differentiated cutting edge passivation parameters, characterized in that the milling cutter has a cutting edge, the passivation radius of the cutting edge near a relief surface is unequal to the passivation radius of the cutting edge near a rake surface; the passivation radius of the cutting edge close to the rear cutter surface or the passivation radius of the cutting edge close to the front cutter surface is less than 0.05mm; the length of the rear cutter surface passivation area of the milling cutter along the cutting edge direction accounts for 60% -85% of the total length of the cutting edge of the rear cutter surface; The length of the passivation area of the front cutter surface of the milling cutter along the cutting edge direction accounts for 60% -90% of the total length of the cutting edge of the front cutter surface.
2. The milling cutter with differentiated cutting edge passivation parameters according to claim 1, wherein the passivation radius of the cutting edge near the relief surface is larger than the passivation radius of the cutting edge near the rake surface, the ratio of the two ranges from 2:1 to 5:1, and the passivation radius of the transition part between the two follows the linear or nonlinear transition principle.
3. The milling cutter with differentiated cutting edge passivation parameters according to claim 1, wherein the milling cutter is made of cemented carbide material, the cemented carbide material contains tungsten carbide and cobalt, and the cobalt content is between 6% and 12%.
4. The milling cutter with differentiated cutting edge passivation parameters according to claim 1, wherein the passivation radius of the cutting edge near the relief surface is smaller than the passivation radius of the cutting edge near the rake surface.
5. The milling cutter with differentiated cutting edge passivation parameters according to claim 4, wherein the ratio of the passivation radius of the cutting edge near the rake face to the passivation radius of the cutting edge near the relief face ranges from 2:1 to 4:1, the passivation radius of the transition between the two following a linear or non-linear transition principle.
6. A method of machining, characterized by being applied to the milling cutter with differentiated cutting edge passivation parameters of any one of claims 1-5; the processing method comprises the following steps: when the passivation radius of the cutting edge, which is close to the rear cutter face, is increased and the passivation radius of the cutting edge, which is close to the front cutter face, is reduced, the proportion of the length of the rear cutter face passivation area of the milling cutter, which is along the cutting edge direction, to the total length of the rear cutter face cutting edge and the proportion of the length of the front cutter face passivation area of the milling cutter, which is along the cutting edge direction, to the total length of the front cutter face cutting edge are regulated and controlled simultaneously, so that the rear cutter face can be better contacted with a workpiece.
7. The method of processing according to claim 6, further comprising: when the passivation radius of the cutting edge, which is close to the rear cutter face, is reduced and the passivation radius of the cutting edge, which is close to the front cutter face, is increased, the proportion of the length of the rear cutter face passivation area of the milling cutter, which is along the cutting edge direction, to the total length of the rear cutter face cutting edge and the proportion of the length of the front cutter face passivation area of the milling cutter, which is along the cutting edge direction, to the total length of the front cutter face cutting edge are regulated and controlled simultaneously, so that the front cutter face can promote chip removal more effectively.

Description

Milling cutter with differentiated cutting edge passivation parameters and machining method Technical Field The invention belongs to the field of milling cutters, and particularly relates to a milling cutter with differentiated cutting edge passivation parameters and a processing method. Background In the milling process, the cutting edge state of the milling cutter has critical influence on the aspects of processing quality, cutter service life, cutting efficiency, surface integrity of a workpiece and the like. Cutting edge passivation is a key process for improving the performance of the milling cutter, and the quality of the cutting edge passivation is directly related to the performance of the milling cutter in actual machining. The traditional milling cutter cutting edge passivation often adopts a single passivation radius, and the mode can not fully meet the differentiated requirements on the performance of the rake face and the relief face under different processing scenes. In some precision machining fields with extremely high requirements on surface quality, such as optical lens mold machining, high-end medical instrument part machining and the like, better contact and support of a rear cutter surface are required to reduce the roughness of a machined surface and ensure the surface machining quality of a workpiece. In some processing scenes needing efficient chip removal and cutting force reduction, such as high-speed milling of an aluminum alloy cylinder body of an automobile engine, processing of titanium alloy structural members in the aerospace field and the like, the performance of a rake face is more critical, and good rake face passivation can effectively prevent chip adhesion, improve processing efficiency and prolong the service life of a cutter. In recent years, many researchers have focused on innovations in edge passivation technology. The Chinese patent application with the publication number of CN111300168A relates to a magnetic grinding passivation method, which comprises the specific steps of setting a magnetic field, adding a magnetic abrasive to form an abrasive brush, and grinding under the driving of a vertical milling machine, wherein the magnetic grinding passivation method is used for carrying out grinding passivation on the blade edge through the magnetic field and the magnetic abrasive, and the method improves the stability of the passivation quality of the blade edge. The Chinese patent application with publication number of CN116900943A discloses a sand blasting passivation process of a hard alloy cutter, and passivation errors are effectively avoided by monitoring abrasive particle changes in real time. The Chinese patent application with publication number of CN107186553A proposes a cutting edge passivation method of a cylindrical end mill, which comprises two steps of vertical rotary passivation and sand blasting passivation, and the uniformity of the cutting edge passivation effect is obviously improved by optimizing equipment parameters and process flows. The Chinese patent application with the publication number of CN117448760A provides a progressive modification passivation method for the passivation of the cutting edge of a PCD cutter, optimizes the microstructure and the performance of the cutting edge through multi-step treatment, and prolongs the service life of the cutter. The Chinese patent application with publication number of CN102343556A adopts high-pressure liquid and abrasive solid-liquid two-phase jet technology, and makes abrasive jet act on the blade edge through a nozzle to implement passivation of trace material, so that the consistency of edge passivation is effectively ensured, and the passivation quality is improved. The Chinese patent application with publication number of CN106498382A proposes a cutting edge method for cutting tools, which is suitable for cutting tool passivation under different processing conditions by controlling passivation values according to processing requirements in a mode of combining manual passivation, brush passivation and mechanical passivation. The Chinese patent application with publication number of CN116900943A carries out passivation treatment on the hard alloy cutter through a sand blasting process, improves the uniformity of the cutting edge through optimizing passivation process parameters, and maximizes the service life of the abrasive particles by monitoring the change of the abrasive particles in real time. The Chinese patent application with publication number of CN106239270A provides a comprehensive treatment process, combines a manual and mechanical passivation method, optimizes passivation treatment aiming at different cutter types and processing requirements, and improves the cutting edge performance. In summary, the conventional cutting edge passivation technology improves the performance of the milling cutter to a certain extent, but the conventional cutting edge passivation technology still has a