CN209452871U - Single-edge left-handed milling cutter for machining copper electrode of die - Google Patents

Abstract

The utility model provides a single-edged left-handed milling cutter of mould copper electrode processing, this milling cutter, including carbide cylinder milling cutter main part, carbide cylinder milling cutter diameter 0.3-4mm, milling cutter have a levogyration cutting edge, and the knife tip has radius angle or chamfer angle. When the tool nose of the hard alloy cylindrical milling cutter body is provided with a fillet, the side cutting helix angle beta is 20-60 degrees, the tool nose fillet radius R is 0.05-1.5mm, and the auxiliary deflection angle kappa' is 5-20 degrees. When the tool nose of the hard alloy cylindrical milling cutter body is provided with a chamfer angle, the side cutting 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 auxiliary deflection angle kappa' is 5-20 degrees. Mould copper electrode processing's single-edged left-handed milling cutter, can effectively restrain mould copper electrode processing's cutting burr, the difficult tipping damage of knife tip moreover, the cutter is longe-lived.

Description

Single-edged left-handed milling cutter for machining copper electrodes of molds

technical field

The utility model relates to the technical field of milling, in particular to a single-edged left-handed milling cutter for processing mold copper electrodes.

Background technique

Mold is an important basic process equipment in the manufacturing industry. The mass production of industrial products and the development of new products are inseparable from molds. 60%-90% of the parts in common industrial products need to be formed by molds.

With the development of society, many molded products, especially personal electronic products, have higher and higher requirements for appearance and detail features, so that copper electrodes for processing related molds need to retain a large number of sharp edge features. Due to the good shape of the copper electrode material, cutting burrs are easily generated when milling sharp edges. When the electrode parts are small in size and require high edge and surface quality, these cutting burrs are difficult to remove through additional processes without damaging the electrode surface. With the development of personal consumer electronics products, the demand for precision copper electrodes is increasing. Therefore, it is of practical significance to study the less burr-free processing technology of copper electrode parts.

Because the side cutting edge of the left-handed tool is left-handed, the face edge of the tool has a large negative rake angle. Therefore, the left-handed tool is usually not suitable for ordinary milling conditions, that is, the side edge and the face edge of the tool participate in cutting at the same time. However, left-hand milling cutters can generate a downward pressure when side milling, which can theoretically reduce the top burr in side milling. Therefore, the left-hand milling cutter has a good application prospect in the field of side milling and deburring, but the premise is that it can overcome the influence of the negative rake angle of the end face of the tool.

The current commercialized left-handed cutters are mainly used for cutting acrylic sheets. The downward pressure component of the left-handed cutting edge is used to ensure the integrity of the edge of the sheet and reduce cutting burrs. However, in this application scheme, the tool used only has a side edge and no end edge, and the tip of the tool is a sharp point without strengthening treatment. Only the side edge of the tool is used during processing, and the tip of the tool does not contact the workpiece. Therefore, this type of tool structure cannot be directly applied to the side milling of metal parts, which may easily lead to chipping or rapid wear of the tool tip.

Industrial application of existing left-handed cutters: The existing left-handed cutters are usually cylindrical in shape and used for cutting acrylic sheets. Its tip does not participate in cutting and has no bottom edge (single-edge left-handed tool).

Patent 201120231256.6 reports "a CNC end mill for burr-free processing of composite materials", and patent 201720223087 reports "a milling cutter for burr-free side processing". These two kinds of cutting tools are left and right rotating cutting edges arranged in a cross manner, and the left and right rotating cutting edges are mainly processed on the side edge, and the two kinds of cutting edges have overlapping intervals. Due to the unavoidable edge eccentricity in the grinding process of the tool, there will be traces on the surface of the workpiece where the edge overlaps after machining, thereby reducing the surface quality of the workpiece, so these two tools are not suitable for demanding parts appearance processing of copper electrode parts.

Therefore, for precision copper electrode processing, some deburring processing methods in the prior art have the following defects:

1) Patent 201710566021.3, a method for deburring copper electrodes, has the following defects: it can only be applied to the processing of electrodes with a flat top surface, and is not suitable for processing electrodes with inclined or curved surfaces.

2) Patent 201120231256.6, a CNC end mill for burr-free processing of composite materials, has defects including: the left and right rotating cutting edges are arranged staggered, and there are overlapping overlapping areas. Since tool eccentricity is unavoidable, tool marks will be left on the surface of the workpiece, which is not suitable for copper electrode processing with high surface quality requirements. In addition, the tool is only suitable for side milling, not for electrode machining on inclined planes or curved surfaces.

3) 201720225087.1 A burr-free side milling cutter has defects including: the left and right rotating cutting edges are arranged in a staggered manner, and there are overlapped areas. Since tool eccentricity is unavoidable, tool marks will be left on the surface of the workpiece, which is not suitable for copper electrode processing with high surface quality requirements. In addition, the tool is only suitable for side milling, not for electrode machining on inclined planes or curved surfaces.

4) The single-edged left-handed tool used for blanking acrylic sheets has defects including: the tip of the tool is sharp, and there is no strengthening treatment for rounding or chamfering. When it is applied to side milling where the tool tip participates in cutting, the tool tip Parts are easy to chip or wear quickly, and the tool life is short. In addition, sharp tips cannot be used for electrode machining on inclined planes or curved surfaces.

In the actual processing of precision copper electrodes in molds, the size of burrs is often reduced by repeated finishing methods, resulting in prolonged processing time and increased processing costs.

Contents of the invention

According to the above proposals, in the actual machining of mold precision copper electrodes, the size of burrs is often reduced by repeated finishing methods, resulting in the technical problems of prolonging the processing time and increasing the processing cost, and a single-edged left-handed machining tool for mold copper electrodes is provided. milling cutter. The utility model mainly utilizes that the milling cutter has a left-handed blade, and the tip of the cutter has a rounded corner or a chamfered angle. By improving the cutter structure and processing technology, the edge and the surface of the copper electrode are not damaged, and only one precision is used. Milling can make the edges of the copper electrodes less burr-free, thereby shortening the processing time and reducing the cost of finishing.

The technical means adopted in the utility model are as follows:

A single-edged left-handed milling cutter for mold copper electrode processing, comprising a cemented carbide cylindrical milling cutter body, the diameter of the cemented carbide cylindrical milling cutter is 0.3-4mm, the milling cutter has a left-handed cutting edge, and the tip of the knife is rounded or chamfered bevel.

Further, when the tip of the main body of the cemented carbide cylindrical milling cutter has a rounded corner, the helix angle β of the side edge is 20°-60°, the radius R of the rounded corner of the tool tip is 0.05-1.5mm, and the secondary deflection angle κ ' is 5°-20°.

Further, when the tip of the main body of the cemented carbide cylindrical milling cutter has a chamfer angle, the helix angle β of the side edge is 20°-60°, the chamfer angle is 45°, the side length of the chamfer is 0.05-0.2mm, and the side edge The angle κ' is 5°-20°.

Compared with the prior art, the utility model has the following advantages:

1. The utility model proposes a single-blade left-handed milling cutter for copper electrode processing of molds. Compared with the existing repeated finishing method of ordinary right-handed milling cutters, it can effectively control cutting burrs, shorten processing time, and reduce processing costs.

2. Compared with the existing left-handed cutting tools, the cutting edge of the cutting tool of the utility model has been rounded or chamfered, which is not easy to be chipped and damaged, and the cutting tool has a long service life, and is more suitable for processing metal parts. And the tool of the utility model can be made into a fillet knife, which can process curved surface and inclined surface parts.

3. Compared with the existing milling cutter for deburring copper electrodes, the technology of the utility model can not only be applied to electrode workpieces whose top is flat, but also can be applied to the processing of copper electrode parts whose top is curved or inclined.

4. Compared with the existing burr-controlling milling cutter with left and right rotating cross-edged milling cutters, the technology of the utility model can overcome the problem of cutting edge marks caused by cutter eccentricity, and can ensure the surface quality of copper electrode parts.

Based on the above reasons, the utility model can be widely promoted in fields such as milling, and can be used for precision copper electrode cutting of electronic product molds through the industrialization of cutting tool companies.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings on the premise of not paying creative labor.

Fig. 1 is a schematic diagram of the utility model arc angle single-blade left-handed milling cutter.

Fig. 2 is a schematic diagram of a beveled single-blade left-handed milling cutter of the present invention.

Fig. 3 is a side milling process of a vertical side electrode by a single-blade left-handed milling cutter of the present invention.

Fig. 4 is a single-blade left-handed milling cutter of the utility model for point milling and processing inclined side electrodes.

Fig. 5 The single-blade left-handed milling cutter of the utility model is used for spot milling and processing inclined top surface electrodes.

In the figure: β is the helix angle of the side edge, R is the radius of the tool nose fillet, and κ' is the secondary deflection angle.

Detailed ways

As shown in the figure, a single-edge left-handed milling cutter for mold copper electrode processing includes a cemented carbide cylindrical milling cutter body. Round or chamfer.

As shown in Figure 1, when the tip of the main body of the cemented carbide cylindrical milling cutter has a rounded corner, the helix angle β of the side edge is 20°-60°, and the radius R of the corner rounded corner is 0.05-1.5mm. The deflection angle κ' is 5°-20°.

As shown in Figure 2, when the tip of the main body of the cemented carbide cylindrical milling cutter has a chamfer angle, the helix angle β of the side edge is 20°-60°, the chamfer angle is 45°, and the side length of the chamfer is 0.05-0.2mm , the secondary deflection angle κ' is 5°-20°.

As shown in the figure, a method of using the single-edged left-handed milling cutter for processing the above-mentioned mold copper electrode includes the following steps:

S1. When finishing the copper electrode of the mold, use an ordinary end mill or ball end mill to process the top surface of the electrode.

S2. When finishing the copper electrode of the mold, use the single-edged left-handed milling cutter for machining the copper electrode of the mold to process the side of the electrode.

When using the single-blade left-handed milling cutter processed by the copper electrode of the mold to process the side of the electrode, when the side of the electrode is a vertical plane, use the side milling method to process the side of the electrode, reverse milling, and the axial depth of cut is 0.5-3mm; when the side of the electrode is oblique On the plane, the side of the electrode is machined by the knife point arc point milling method, up-cut milling, and the axial depth of cut is 0.03-0.2mm.

The single-blade left-handed milling cutter for mold copper electrode processing and the use method thereof described in the utility model can effectively suppress cutting burrs in mold copper electrode processing, and the tip of the tool is not easy to be chipped and damaged, and the tool life is long.

Example 1

As shown in Figure 3, the tool diameter is 2mm, the single edge is left-handed, the helix angle is 35°, the secondary deflection angle is 15°, and the corner radius of the tool tip is 0.4mm. When using the milling cutter to finish the copper electrode, the top surface of the electrode is first processed by the ordinary optimal milling cutter, and then the side of the electrode is processed by up-milling with the left-handed cutter, and the axial depth of cut is 1mm.

Example 2

As shown in Figure 4, the tool diameter is 4mm, the single edge is left-handed, the helix angle is 35°, the secondary deflection angle is 15°, and the corner radius of the tool tip is 1.5mm. When using this milling cutter to fine-machine a copper electrode with a beveled side, first select an ordinary preferred milling cutter to process the top surface of the electrode, and then use the left-handed cutter to up-cut the side of the electrode with a rounded corner contour and upcut milling, with a cutting depth of 0.05mm.

Example 3

As shown in Figure 5, the tool diameter is 2mm, the single edge is left-handed, the helix angle is 35°, the secondary deflection angle is 15°, and the corner radius of the tool tip is 0.8mm. When using the milling cutter to finish machining the copper electrode whose top surface is composed of a bevel, the side of the electrode is processed by up-cut milling at the same height as the rounded corner of the left-handed cutter, and the cutting depth is 0.03mm.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (3)

1. A single-blade left-handed milling cutter for mold copper electrode processing, characterized in that it comprises a carbide cylindrical milling cutter main body, and the carbide cylindrical milling cutter has a diameter of 0.3-4mm, and the milling cutter has a left-handed blade with a tip Have rounded or chamfered corners. 2. the single-edge left-hand milling cutter of mold copper electrode processing according to claim 1, is characterized in that, When the tip of the main body of the cemented carbide cylindrical milling cutter has rounded corners, the helix angle β of the side edge is 20°-60°, the corner radius R of the tool tip is 0.05-1.5mm, and the secondary deflection angle κ' is 5 °-20°. 3. the single-edged left-hand milling cutter of mold copper electrode processing according to claim 1, is characterized in that, When the tip of the cemented carbide cylindrical milling cutter body has a chamfer angle, the helix angle β of the side edge is 20°-60°, the chamfer angle is 45°, the side length of the chamfer is 0.05-0.2mm, and the secondary deflection angle κ′ 5°-20°.