CN109551025B - Single-edge left-hand milling cutter for die copper electrode machining and using method thereof - Google Patents
Single-edge left-hand milling cutter for die copper electrode machining and using method thereof Download PDFInfo
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- CN109551025B CN109551025B CN201910062753.8A CN201910062753A CN109551025B CN 109551025 B CN109551025 B CN 109551025B CN 201910062753 A CN201910062753 A CN 201910062753A CN 109551025 B CN109551025 B CN 109551025B
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- 238000003801 milling Methods 0.000 title claims abstract description 84
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 49
- 239000010949 copper Substances 0.000 title claims abstract description 49
- 238000003754 machining Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005520 cutting process Methods 0.000 claims abstract description 33
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims description 19
- 241001391944 Commicarpus scandens Species 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
- B23C2210/0407—Cutting angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/04—Angles
- B23C2210/0485—Helix angles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention provides a single-blade left-handed milling cutter for die copper electrode machining and a use method thereof, wherein the milling cutter comprises a hard alloy cylindrical milling cutter body, the diameter of the hard alloy cylindrical milling cutter body is 0.3-4mm, the milling cutter is provided with a left-handed cutting edge, and the cutter tip is provided with a chamfer angle or a chamfer angle. When the cutter point of the hard alloy cylindrical milling cutter body is provided with a chamfer angle, the helix angle beta of the side edge is 20-60 degrees, the radius R of the cutter point chamfer angle is 0.05-1.5mm, and the auxiliary deflection angle kappa' is 5-20 degrees. When the cutter point of the hard alloy cylindrical milling cutter body has a chamfer angle, the helix angle beta of the side edge is 20-60 degrees, the chamfer angle is 45 degrees, the chamfer side length is 0.05-0.2mm, and the auxiliary deflection angle kappa' is 5-20 degrees. The single-blade left-handed milling cutter for the die copper electrode machining and the application method thereof can effectively inhibit cutting burrs of the die copper electrode machining, and the cutter point is not easy to collapse and break, so that the service life of the cutter is long.
Description
Technical Field
The invention relates to the technical field of milling, in particular to a single-blade left-hand milling cutter for die copper electrode machining and a use method thereof.
Background
The mold is an important basic technological equipment in the manufacturing industry, the mass production of industrial products and the development of new products are all independent of the mold, and 60% -90% of common industrial products need to be formed by the mold.
As society develops, many die articles, particularly personal electronics, are increasingly demanding in terms of appearance and detail, such that the copper electrodes used to process the associated die are required to retain a large number of sharp edge features. Because the copper electrode material has good shaping, cutting burrs are extremely easy to generate when sharp edges are milled. When the electrode part is small in size and high in edge and surface quality requirements, these cutting burrs are difficult to remove by additional processes without damaging the electrode surface. With the development of personal consumer electronics, the demand of precise copper electrodes is increasing, so that the research on the technology of processing copper electrode parts with few burrs and no burrs has practical significance.
The left-hand cutter is generally not suitable for the working condition of common milling because the side cutting edge of the cutter is a left-hand spiral, so that a larger negative rake angle exists on the end surface edge of the cutter, namely, the side cutting edge and the end surface edge of the cutter simultaneously participate in cutting. However, the left-hand milling cutter is capable of generating a downward pressure during side milling, and theoretically, the top burr of the side milling can be reduced. Therefore, the left-hand milling cutter has better application prospect in the field of side milling deburring, but the premise is that the influence of the negative rake angle of the end face edge of the cutter can be overcome.
The current commercial left-hand tool is mainly used for cutting an acrylic plate, and the downward pressing component of a left-hand cutting edge is utilized to ensure the integrity of the edge of the plate, so that cutting burrs are reduced. However, in this application, only the side edge of the tool is used, no end edge is provided, the tool nose is a sharp point, no strengthening treatment is performed, only the side edge of the tool is used during processing, and the tool nose part is not contacted with the workpiece. Therefore, the cutter structure cannot be directly applied to side milling of metal parts, and the cutter point is easy to break or rapidly wear.
Industrial application of left-hand tools already exists: the existing left-hand cutters are generally cylindrical in outline and are used for blanking acrylic plates. The tool tip does not participate in cutting, and no bottom edge (single-edge left-hand tool) is provided.
Patent 201120231256.6 reports "a composite burr-free machining numerical control end mill", and patent 201720223087 reports "a burr-free side machining milling cutter". The two cutters are crossed with left and right rotary cutting edges, which are mainly machined by side edges, and overlap sections exist between the two cutters. Because the cutting edge is inevitably eccentric in the grinding process of the cutter, the overlapping part of the cutting edge leaves marks on the surface of the workpiece after processing, thereby reducing the surface quality of the workpiece, and therefore, the two cutter cutters are not suitable for processing copper electrode parts with strict requirements on the appearance of the parts.
Therefore, some deburring methods in the prior art have the following drawbacks for precision copper electrode machining:
1) Patent 201710566021.3, a method for deburring red copper electrodes, has the following defects: the method is only suitable for electrode processing with a plane top surface, but not suitable for inclined surface or curved surface electrode processing.
2) Patent 201120231256.6, a composite material burr-free processing numerical control end mill, has drawbacks including: the left-handed cutting edges and the right-handed cutting edges are staggered, and a joint overlapping area exists. Because the eccentricity of the cutter is unavoidable, cutter marks are left on the surface of a workpiece, and the cutter is not suitable for copper electrode processing with high requirements on surface quality. In addition, the cutter is only suitable for side milling and is not suitable for machining inclined plane or curved surface electrodes.
3) 201720225087.1 A burr-free side processing milling cutter, which has defects including: the left-handed cutting edges and the right-handed cutting edges are staggered, and a joint overlapping area exists. Because the eccentricity of the cutter is unavoidable, cutter marks are left on the surface of a workpiece, and the cutter is not suitable for copper electrode processing with high requirements on surface quality. In addition, the cutter is only suitable for side milling and is not suitable for machining inclined plane or curved surface electrodes.
4) Single-edge left-hand cutter for blanking acrylic plates has the defects that: the cutter point is sharp, the strengthening treatment of a chamfer angle or a chamfer angle is not carried out, when the cutter point is applied to side milling processing in which the cutter point participates in cutting, the cutter point part is easy to break or rapidly wear, and the service life of the cutter is short. In addition, sharp tips cannot be used in bevel or curved electrode machining.
In the actual die precision copper electrode machining, the burr size is often reduced by a method of repeated finish machining, resulting in prolonged machining time and increased machining cost.
Disclosure of Invention
According to the technical problems that in the actual die precise copper electrode machining, the burr size is often reduced by a method of repeated fine machining, the machining time is prolonged, and the machining cost is increased are solved. The invention mainly uses the milling cutter to have a left-hand cutting edge, and the cutter tip has a rounding angle or a chamfering angle, and the invention can lead the copper electrode edge to be less and free of burrs by only one finish milling on the premise of ensuring that the copper electrode edge and the surface are not damaged by improving the cutter structure and the processing technology, thereby shortening the processing time and reducing the finish processing cost.
The invention adopts the following technical means:
A single-blade left-handed milling cutter for die copper electrode machining comprises a hard alloy cylindrical milling cutter body, wherein the diameter of the hard alloy cylindrical milling cutter body is 0.3-4mm, the milling cutter is provided with a left-handed cutting edge, and a cutter point is provided with a chamfer angle or a chamfer angle.
Further, when the tip of the hard alloy cylindrical milling cutter body is provided with a chamfer, the side edge helix angle beta is 20-60 degrees, the tip chamfer radius R is 0.05-1.5mm, and the secondary deflection angle kappa' is 5-20 degrees.
Further, when the cutter point of the hard alloy cylindrical milling cutter body has a chamfer angle, the helix angle beta of the side edge is 20-60 degrees, the chamfer angle is 45 degrees, the chamfer side length is 0.05-0.2mm, and the auxiliary deflection angle kappa' is 5-20 degrees.
The application method of the single-edge left-hand milling cutter for the die copper electrode machining comprises the following steps:
s1, when the die copper electrode is finished, a common end mill or a ball end mill is adopted to process the top surface of the electrode.
S2, when the die copper electrode is finished, a single-blade left-handed milling cutter for machining the die copper electrode is adopted to machine the side face of the electrode.
Further, when the single-edge left-hand milling cutter for processing the copper electrode of the die is adopted to process the side surface of the electrode, when the side surface of the electrode is a vertical plane, a side milling method is adopted to process the side surface of the electrode, and the back milling is adopted, so that the axial cutting depth is 0.5-3mm. When the side surface of the electrode is an inclined plane, the side surface of the electrode is processed by adopting a knife tip arc point milling method, and is reversely milled, and the axial cutting depth is 0.03-0.2mm.
Compared with the prior art, the invention has the following advantages:
1. Compared with the existing common right-handed milling cutter repeated finish machining method, the single-blade left-handed milling cutter for die copper electrode machining can effectively control cutting burrs, shorten machining time and reduce machining cost.
2. Compared with the existing left-handed cutter, the cutter has the advantages that the cutter tip of the cutter is subjected to chamfering or chamfering strengthening treatment, the cutter tip is not easy to break, the service life of the cutter is long, and the cutter is more suitable for processing metal parts. The tool can be made into a circular angle tool, and can process curved surface and inclined surface parts.
3. Compared with the existing deburring method for the red copper electrode, the deburring method for the copper electrode not only can be applied to electrode workpieces with flat tops, but also can be applied to copper electrode part machining with curved surfaces and inclined surfaces at the tops.
4. Compared with the existing burr control method of the left-right-handed crossed edge milling cutter, the technology of the invention can overcome the problem of cutter grain joint mark caused by cutter eccentricity and can ensure the surface quality of copper electrode parts.
For the reasons, the method can be widely popularized in the fields of milling and the like, and can be used for precise copper electrode cutting of the electronic product die through industrialization of cutter companies.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic view of a single-edge left-hand milling cutter with circular arc angles according to the present invention.
Fig. 2 is a schematic view of the bevel single-edge left-hand milling cutter of the present invention.
Fig. 3 is a side milling vertical side electrode of the single-edge left-hand milling cutter of the present invention.
Fig. 4 is a point milling oblique side electrode of the single-edge left-hand milling cutter of the present invention.
Fig. 5 a single-edge left-hand milling cutter of the present invention is used for point milling an inclined top electrode.
In the figure: beta is the side edge helix angle, R is the nose fillet radius, and kappa' is the secondary deflection angle.
Detailed Description
As shown in the figure, the single-blade left-hand milling cutter for die copper electrode machining comprises a hard alloy cylindrical milling cutter body, wherein the diameter of the hard alloy cylindrical milling cutter body is 0.3-4mm, the milling cutter is provided with a left-hand cutting edge, and the cutter point is provided with a chamfer angle or a chamfer angle.
As shown in fig. 1, when the tip of the cemented carbide cylindrical milling cutter body has a chamfer, the side edge helix angle beta is 20-60 degrees, the tip corner radius R is 0.05-1.5mm, and the secondary deflection angle kappa' is 5-20 degrees.
As shown in fig. 2, when the tip of the cemented carbide cylindrical milling cutter body has a chamfer angle, the side edge helix angle beta is 20-60 degrees, the chamfer angle is 45 degrees, the chamfer side length is 0.05-0.2mm, and the secondary deflection angle kappa' is 5-20 degrees.
As shown in the figure, the application method of the single-edge left-hand milling cutter for the die copper electrode machining comprises the following steps:
s1, when the die copper electrode is finished, a common end mill or a ball end mill is adopted to process the top surface of the electrode.
S2, when the die copper electrode is finished, a single-blade left-handed milling cutter for machining the die copper electrode is adopted to machine the side face of the electrode.
When the single-edge left-hand milling cutter for processing the copper electrode of the die is adopted to process the side surface of the electrode, when the side surface of the electrode is a vertical plane, a side milling method is adopted to process the side surface of the electrode, and the reverse milling and the axial cutting depth are 0.5-3mm; when the side surface of the electrode is an inclined plane, the side surface of the electrode is processed by adopting a knife tip arc point milling method, and is reversely milled, and the axial cutting depth is 0.03-0.2mm.
The single-blade left-handed milling cutter for the die copper electrode machining and the application method thereof can effectively inhibit cutting burrs of the die copper electrode machining, and the cutter point is not easy to collapse and break, so that the service life of the cutter is long.
Example 1
As shown in FIG. 3, the diameter of the cutter is 2mm, the single blade rotates left, the helix angle is 35 degrees, the auxiliary deflection angle is 15 degrees, and the radius of the cutter nose fillet is 0.4mm. When the milling cutter is used for finish machining of the copper electrode, the common optimal milling cutter is firstly selected for machining of the top surface of the electrode, and then the left-hand cutter is used for reverse milling of the side surface of the electrode, so that the axial cutting depth is 1mm.
Example 2
As shown in FIG. 4, the diameter of the cutter is 4mm, the single blade rotates left, the helix angle is 35 degrees, the auxiliary deflection angle is 15 degrees, and the radius of the cutter nose fillet is 1.5mm. When the milling cutter is used for finishing the copper electrode with the inclined surface as the side surface, the common optimal milling cutter is firstly selected for processing the top surface of the electrode, and then the side surface of the electrode is processed by the equal-height reverse milling of the nose fillet of the left-hand cutter, wherein the undercut depth is 0.05mm.
Example 3
As shown in FIG. 5, the diameter of the cutter is 2mm, the single blade rotates left, the helix angle is 35 degrees, the auxiliary deflection angle is 15 degrees, and the radius of the cutter nose fillet is 0.8mm. When the milling cutter is used for finishing the copper electrode with the top surface formed by the inclined surface, the side surface of the electrode is milled by the equal-height reverse milling of the tool nose fillet of the left-hand tool, and the undercut depth is 0.03mm.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (1)
1. The application method of the single-blade left-handed milling cutter for die copper electrode machining is characterized in that the single-blade left-handed milling cutter for die copper electrode machining comprises a hard alloy cylindrical milling cutter body, the diameter of the hard alloy cylindrical milling cutter is 0.3-4mm, the milling cutter is provided with a left-handed cutting edge, and the cutter point is provided with a chamfer angle or a chamfer angle;
the application method of the single-edge left-hand milling cutter for die copper electrode machining comprises the following steps:
S1, when a copper electrode of a die is finished, a common end mill or a ball end mill is adopted to process the top surface of the electrode;
S2, when the die copper electrode is finished, a single-blade left-hand milling cutter for machining the die copper electrode is adopted to machine the side face of the electrode;
When the cutter point of the hard alloy cylindrical milling cutter body is provided with a chamfer angle, the helix angle beta of the side edge is 20-60 degrees, the radius R of the cutter point chamfer angle is 0.05-1.5mm, and the auxiliary deflection angle kappa' is 5-20 degrees;
When the cutter point of the hard alloy cylindrical milling cutter body has a chamfer angle, the helix angle beta of the side edge is 20-60 degrees, the chamfer angle is 45 degrees, the chamfer side length is 0.05-0.2mm, and the auxiliary deflection angle kappa' is 5-20 degrees;
When the single-blade left-handed milling cutter for processing the copper electrode of the die is adopted to process the side surface of the electrode,
When the side surface of the electrode is a vertical plane, machining the side surface of the electrode by adopting a side milling method, and performing back milling, wherein the axial cutting depth is 0.5-3mm;
When the side surface of the electrode is an inclined plane, the side surface of the electrode is processed by adopting a knife tip arc point milling method, and is reversely milled, and the axial cutting depth is 0.03-0.2mm.
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CN109551025B true CN109551025B (en) | 2024-05-03 |
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2019
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