CN216656492U - Composite forming milling cutter - Google Patents

Abstract

The embodiment of the application discloses a composite forming milling cutter, which comprises four helical blades, wherein the front section of each helical blade is an assembling cutter body, the middle section of each helical blade is a forming cutter body, and the tail end of each helical blade is a clamping cutter rod; the spiral blade on the cutter head of the assembled cutter body is an assembled cutting surface and is used for cutting and polishing the assembled surface; an inner concave processing groove is arranged on the helical blade on the forming cutter body, and an arc shape is arranged between the side wall forming surface and the bottom groove forming surface of the inner concave processing groove and used for forming an arc-shaped corner. The composite forming milling cutter provided by the utility model integrates the functions of machining an assembling surface and a forming surface, does not need secondary tool changing and tool setting, avoids error accumulation and improves the machining precision.

Description

Composite forming milling cutter

Technical Field

The utility model relates to the field of high-precision milling cutter machining, in particular to a composite forming milling cutter.

Background

In some high-precision machining fields, a micro milling cutter needs to be designed for specific machining equipment so as to achieve the purpose of high-precision cutting. For example, in the manufacturing process of the metal shell of the mobile phone, the radian of the edge of the mobile phone and the size of the shell need to be strictly controlled.

In the prior art, in the process of producing the mobile phone shell, the frame size of the metal shell needs to be cut by straight milling cutters respectively to form an assembly surface. Then the cutter head is replaced again, and the radian of the frame is processed by adopting an arc-shaped milling cutter to form a molding surface. The process needs to replace the cutter head for many times for secondary processing. For the manufacturing and processing process of a precision instrument, the size needs to be controlled within a millimeter range, the cutter head is replaced for many times, the secondary processing can generate larger precision errors, and the product percent of pass is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a micro finish milling cutter, which comprises four spiral blades, wherein the front section of each spiral blade is an assembling cutter body, the middle section of each spiral blade is a forming cutter body, and the tail end of each spiral blade is a clamping cutter rod;

the spiral blade on the cutter head of the assembled cutter body is an assembled cutting surface and is used for cutting and polishing the assembled surface;

and an inner concave processing groove is arranged on the helical blade positioned on the forming cutter body, and an arc shape is arranged between the side wall forming surface and the bottom groove forming surface of the inner concave processing groove and used for forming an arc-shaped corner.

Specifically, the length of the composite forming milling cutter is 50 mm; the length of the assembling cutter body at the front section is 9.99mm, the length of the forming cutter body at the middle section is 10.21mm, the diameter of a milling cutter of the assembling cutter body is 12mm, and the diameter of the milling cutter of the forming cutter body is 9.5 mm.

Specifically, the helical angles of the four helical cutting edges are 30 degrees; four concave processing grooves are respectively formed in the four spiral cutting edges positioned in the middle section;

the processing depth of indent processing groove is 1.5mm, and the processing width is 7.59mm, the lateral wall profiled surface with the arc corner between the kerve profiled surface is 0.01.

Specifically, the angles of the four unequal grooves formed by the four helical cutting edges are respectively 0 degree, 88 degrees, 180 degrees and 268 degrees.

The utility model discloses the beneficial effect who brings includes at least: the composite forming milling cutter provided by the utility model integrates the functions of processing the assembly surface and the forming surface, the assembly cutter body at the front section processes the assembly surface of the mobile phone shell through the spiral cutting edge, the forming cutter body at the middle section can process the forming surface of the mobile phone shell through the concave processing groove, secondary cutter changing and cutter setting are not needed, the error accumulation is avoided, and the processing precision is improved.

Drawings

Fig. 1 is a dimensional structure diagram of a composite milling cutter provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a side metal frame of a mobile phone according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a composite milling cutter provided in an embodiment of the present application;

fig. 4 is a schematic structural view of a shaped cutter body provided in an embodiment of the present application;

FIG. 5 is a schematic view of an interface of a tool tip provided by an embodiment of the present application;

fig. 6 is a schematic processing diagram provided in an embodiment of the present application.

The reference numerals denote: the cutter comprises a cutter body 1, a cutter body 2, a cutter rod 3, a spiral blade 4, a concave processing groove 21, a side wall forming surface 211, a bottom groove forming surface 212, a first cutting surface 41 and a second cutting surface 42.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Fig. 1 is a dimensional structure diagram of a composite milling cutter provided in an embodiment of the present application, where the composite milling cutter has a total length of 50mm and a diameter of 12mm, and is used for manufacturing a side frame of a mobile phone case. The milling cutter overall structure is straight helical blade milling cutter, including the assembly cutter body 1 of anterior segment, and effective length is 9.99mm, the shaping cutter body 2 of middle section, effective length with be 10.21mm to and terminal centre gripping cutter arbor 3. Wherein, the assembling cutter body 1 at the front section is ground and polished through a cutting surface to form an assembling surface; and the forming cutter body 2 at the middle section is used for cutting to form a forming surface, namely the side shape of the metal shell of the mobile phone.

Fig. 2 is a schematic diagram of the structure of a metal frame on the side of a mobile phone, because the radian of the side frame is small, the metal frame belongs to millimeter-sized machining precision, if the existing tool is machined, the back of a metal shell needs to be polished with the tool, then the tool bit is replaced to polish the curved edge of the side, and the tool bit is frequently replaced in the millimeter-sized precision to cause excessive error accumulation. The compactness and accuracy of later assembly are affected. Therefore, the milling cutter combines the cutter body and the formed cutter body at the same time.

In fig. 3, the assembled cutter body and the formed cutter body are provided with four helical blades 4, the helical angles of the helical blades 4 are all 30 degrees, the thickness of the helical blades 4 at least needs to be larger than 1.5mm, and the helical blades are used for generating the radian of a metal frame and specifically comprise three cutting surfaces, the blade formed between a first cutting surface 411 and a second cutting surface 412 is used for metal cutting and grinding, and the third cutting surface 412 is a back tool surface and used for discharging cutting waste. Four concave processing grooves 21 are respectively arranged on four helical blades 4 of the molded cutter body 1. As shown in fig. 4, the thickness of the concave machining groove 21 is the effective thickness of the helical blade. The processing depth of the concave processing groove 21 is 1.5mm, and the processing width is 7.59 mm. The concave processing groove 21 has side wall forming surfaces 211 at both sides thereof and a bottom groove forming surface 212 at the bottom thereof, and in order to form an arc corner, a 0.01 arc is required to be provided between the side wall forming surfaces 211 and the bottom groove forming surface 212. And the concave processing grooves 21 on the four helical blades 4 are positioned at the same height position.

In the figure 5, the four helical blades are distributed in an unequal structure, the angles of the four unequal grooves are respectively 0 degree, 88 degrees, 180 degrees and 268 degrees, and the groove width is 1.35 mm. The unequal groove structure is beneficial to cutting, facilitates the discharge of cutting waste materials, and can reduce the vibration of the milling cutter. The cutter face of the cutter head in the device is an assembly cutting face, the length of the cutting edge is 3.85mm, and the cutting inclination angle is 25 degrees. It should be noted that the cutting inclination angle and the cutting edge length can be adjusted according to the actual situation, which is not limited in this embodiment.

Fig. 6 is a process of manufacturing a metal shell of a mobile phone by the milling cutter, wherein the periphery of the curved edge is firstly polished by the cutter body to form an assembly surface, and then the inner side of the curved edge is polished by the cutter body to form a narrow curved edge. The whole process does not need two replacement tool bits, so that error accumulation caused by the replacement tool bits is avoided, and the precision is higher.

In conclusion, the composite formed milling cutter provided by the utility model integrates the functions of machining the assembling surface and the forming surface, the assembling cutter body at the front section machines the assembling surface of the mobile phone shell through the spiral cutting edge, the forming cutter body at the middle section can machine the forming surface of the mobile phone shell through the concave machining groove, secondary tool changing and tool setting are not needed, the error accumulation is avoided, and the machining precision is improved.

The above description is of the preferred embodiment of the utility model; it is to be understood that the utility model is not limited to the particular embodiments described above, in which devices and structures not described in detail are understood to be implemented in a manner that is conventional in the art; any person skilled in the art can make many possible variations and modifications, or modify equivalent embodiments, without departing from the technical solution of the utility model, without affecting the essence of the utility model; therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims (4)

1. The composite forming milling cutter is characterized by comprising four helical blades, wherein the front section of each helical blade is an assembling cutter body, the middle section of each helical blade is a forming cutter body, and the tail end of each helical blade is a clamping cutter rod;

the spiral blade on the cutter head of the assembled cutter body is an assembled cutting surface and is used for cutting and polishing the assembled surface;

and an inner concave processing groove is arranged on the helical blade positioned on the forming cutter body, and an arc shape is arranged between the side wall forming surface and the bottom groove forming surface of the inner concave processing groove and used for forming an arc-shaped corner.

2. The composite milling cutter as defined in claim 1, wherein the composite milling cutter has a length of 50 mm; the length of the assembling cutter body at the front section is 9.99mm, the length of the forming cutter body at the middle section is 10.21mm, the diameter of a milling cutter of the assembling cutter body is 12mm, and the diameter of the milling cutter of the forming cutter body is 9.5 mm.

3. The composite profile milling cutter as defined in claim 2, wherein the helix angle of the four helical cutting edges is 30 degrees; four concave processing grooves are respectively formed in the four spiral cutting edges positioned in the middle section;

the processing depth of indent processing groove is 1.5mm, and the processing width is 7.59mm, the lateral wall profiled surface with the arc corner between the kerve profiled surface is 0.01.

4. The composite profile milling cutter according to claim 3, wherein the four unequal flute angles formed by the four helical cutting edges are 0 degrees, 88 degrees, 180 degrees, and 268 degrees, respectively.

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