CN111774621A - A multi-station compound milling cutter for processing plastics - Google Patents

Abstract

The invention discloses a multi-position compound milling cutter for processing plastic, which comprises a tool handle and a cutting part arranged at one end of the tool handle; the cutting part includes a tool core and a cutting edge formed on the outer surface of the tool core. The knife core is coaxially connected with the knife handle, the front end of the knife core is tapered, the knife edge includes a left-handed peripheral edge and a right-handed peripheral edge, and the left-handed peripheral edge is arranged on the side close to the knife handle , the right-handed peripheral blade is arranged on the side away from the handle, the left-handed peripheral blade and the right-handed peripheral blade are connected by a staggered transition portion, and the tapered front end of the knife core is formed with an X-shaped A drill tip, the X-shaped drill tip is provided with a right-handed end edge, and the right-handed end edge is connected with the right-handed peripheral edge. The invention has the advantages of reasonable and reliable structure, long service life, smooth processing of plastic by the tool, high processing efficiency and less burrs of the processed products.

Description

A multi-station compound milling cutter for processing plastics

technical field

The invention belongs to the technical field of machining tools, in particular to a multi-position compound milling cutter for machining plastics.

Background technique

With the development and enrichment of materials science, more and more new materials have been used in the mobile phone industry, and plastic has also become the mainstream of mobile phone materials, with low cost and good effect, but it also brings some difficulties to processing.

The existing tools for processing alloys will have many problems when processing plastics. Because the plastic itself has the characteristics of high temperature resistance and low melting point, it brings many problems to the processing of the tools. The tools will generate high temperature during processing, and the plastic will change. Soft or even melted, the cutting edge of the tool will be completely covered with plastic, and the cutting edge of the tool is easily worn, the life of the tool is very low, and the processed products have many burrs.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a multi-station compound milling cutter with reasonable and reliable structure, high service life, high processing efficiency, less burrs in the processed products, and which can ensure the smooth processing of plastic by the tool.

In order to achieve the above purpose, the present invention provides a multi-station compound milling cutter for processing plastic, which includes a tool handle and a cutting portion disposed at one end of the tool handle, the cutting portion includes a tool core and a tool formed outside the tool core. The blade on the surface, the core is coaxially connected with the handle, the front end of the core is tapered, the blade includes a left-handed peripheral blade and a right-handed peripheral blade, and the left-handed peripheral blade is arranged near the On one side of the handle, the right-handed peripheral edge is located on the side away from the handle, the left-handed peripheral edge and the right-handed peripheral blade are connected by a staggered transition portion, and the tapered shape of the knife core An X-shaped drill tip is formed at the front end, and the X-shaped drill tip is provided with a right-handed end blade, and the right-handed end blade is connected with the right-handed peripheral blade.

As a preferred solution of the present invention, the helix angle of the left-handed peripheral edge is 20 degrees to 25 degrees.

As a preferred solution of the present invention, the helix angle of the right-handed peripheral edge is 15 degrees to 25 degrees.

As a preferred solution of the present invention, the thickness of the top end of the cutting core is 0.9 mm.

As a preferred solution of the present invention, the taper value of the core thickness of the blade core extending from the top end to the shank portion is 0.2 degrees per side.

As a preferred solution of the present invention, the left-handed peripheral blade is provided with a first left-handed peripheral blade and a second left-handed peripheral blade, the first left-handed peripheral blade is arranged on a side close to the handle, and the first left-handed peripheral blade The blade is arranged on a side close to the right-handed peripheral blade, and the blade diameter of the second left-handed peripheral blade is larger than the blade diameter of the first left-handed peripheral blade.

As a preferred solution of the present invention, a left-handed peripheral edge transition cone is provided between the first left-handed peripheral edge and the second left-handed peripheral edge, and the taper of the left-handed peripheral edge transition cone is 63 degrees.

As a preferred solution of the present invention, the relief angle of the left-handed peripheral edge is sequentially provided with a first axial relief angle and a second axial relief angle from the cutting edge to the inner side in the axial direction, and the first axial relief angle is 14 degrees, the second axial relief angle is 20 degrees; the relief angle of the left-handed peripheral edge is sequentially provided with a first radial relief angle and a second radial relief angle from the cutting edge to the inside in the radial direction, so The first radial relief angle is 16 degrees, and the second radial relief angle is 30 degrees.

As a preferred solution of the present invention, the blade width corresponding to the first radial relief angle of the first left-handed peripheral blade is 0.1 mm to 0.13 mm.

As a preferred solution of the present invention, the right-handed peripheral edge and the second left-handed peripheral edge are provided with a first radial relief angle and a second radial relief angle in order from the cutting edge to the inside in the radial direction, and the The first radial relief angle is 14 degrees, and the second radial relief angle is 30 degrees.

As a preferred solution of the present invention, the blade width corresponding to the first radial relief angle of the right-handed peripheral blade and the blade width corresponding to the first radial relief angle of the second left-handed peripheral blade are both 0.1 mm to 0.13 mm .

As a preferred solution of the present invention, the blade width corresponding to the first radial relief angle of the right-handed peripheral blade is 0.1 mm to 0.13 mm.

As a preferred solution of the present invention, the length of the staggered transition portion in the axial direction is 0.15 mm to 0.25 mm.

As a preferred solution of the present invention, the taper of the X-shaped drill tip is 90 degrees.

As a preferred solution of the present invention, the rake angle of the right-handed end edge on the X-shaped drill point is 8 degrees to 10 degrees.

As a preferred solution of the present invention, the relief angle of the right-handed end edge of the X-shaped drill point is sequentially provided with a first relief angle and a second relief angle from the cutting edge to the inside, and the first relief angle is 15 degrees to 18 degrees. , the second relief angle is 30 degrees.

Compared with the prior art, the multi-station composite milling cutter for processing plastic provided by the present invention has the following beneficial effects:

(1) The structure of the left and right-handed compound knife is adopted, the front end is a right-handed peripheral blade, the helix angle is 15 degrees to 25 degrees, and the rear end is a left-handed peripheral blade, and the helix angle is 20 degrees to 25 degrees. This structure can greatly improve the cutting tool. The strength and rigidity of the tool are smooth, and the processed products are free of burrs.

(2) The left-handed peripheral edge of the tool adopts the design of double relief angle, the axial relief angle is 14 degrees/20 degrees, and the radial relief angle is 16 degrees/30 degrees. This structure can not only ensure the sharpness of the tool, and make the cutting without abnormality , and at the same time ensure the rigidity of the tool while ensuring sufficient air avoidance.

(3) The front-end chamfer of the tool adopts the structure of X-shaped drill tip, the front angle of the drill tip is given to 8 degrees to 10 degrees, and the rear angle of the drill tip is 15 degrees to 18 degrees/30 degrees. This structure makes this knife not only It can drill and chamfer, and the peripheral edge can also be milled. One tool can process multiple stations, which not only reduces the cost but also greatly improves the efficiency.

Description of drawings

In order to describe the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings of the embodiments will be briefly introduced below.

Fig. 1 is the structural representation of a kind of multi-station compound milling cutter for processing plastic provided by the present invention;

Figure 2 is a schematic diagram of the structure of the X-shaped drill tip.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. refer to the orientation or position The relationship is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the machine or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore It should not be construed as a limitation of the present invention. It should be understood that the terms "first", "second" and the like are used in the present invention to describe various information, but these information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

As shown in FIG. 1 and FIG. 2 , a multi-station compound milling cutter for processing plastics according to a preferred embodiment of the present invention includes a tool holder 1 and a cutting portion 2 disposed at one end of the tool holder 1 . The cutting portion 2 includes a knife core 21 and a blade formed on the outer surface of the knife core 21, the knife core 21 is coaxially connected with the knife handle 1, the front end of the knife core 21 is tapered, and the knife edge includes a left-handed peripheral edge 22 and the right-handed peripheral edge 23, the left-handed peripheral edge 22 is arranged on the side close to the handle 1, the right-handed peripheral edge 23 is arranged on the side away from the handle 1, the left-handed peripheral edge 22 It is connected with the right-handed peripheral edge 23 through a staggered transition portion 25. The tapered front end of the cutter core 21 is formed with an X-shaped drill tip 24, and the X-shaped drill tip 24 is provided with a right-handed end edge 241. The right-handed end edge 241 is connected to the right-handed peripheral edge 23 .

As a preferred solution of the present invention, the helix angle of the left-handed peripheral edge 22 is 20 degrees to 25 degrees. In this embodiment, the helix angle of the left-handed peripheral edge 22 is 25 degrees.

Exemplarily, the helix angle of the right-handed peripheral edge 23 is 15 degrees to 25 degrees. In this embodiment, the helix angle of the right-handed peripheral edge 23 is preferably 15 degrees.

As a preferred solution of the present invention, the core thickness of the top end of the blade core 21 is 0.9 mm.

As a preferred solution of the present invention, the taper value of the core thickness of the blade core 21 extending from the top end to the shank portion is 0.2 degrees per side.

As a preferred solution of the present invention, the left-handed peripheral blade 22 is provided with a first left-handed peripheral blade 221 and a second left-handed peripheral blade 222, and the first left-handed peripheral blade 221 is arranged on the side close to the handle 1, so The first left-handed peripheral edge 221 is disposed on a side close to the right-handed peripheral edge 23 , and the diameter of the second left-handed peripheral edge 222 is larger than that of the first left-handed peripheral edge 221 . In this embodiment, the blade diameter of the first left-handed peripheral blade 221 is 1.88 mm, and the blade diameters of the second left-handed peripheral blade 222 and the right-handed peripheral blade 23 are both 2.2 mm.

Exemplarily, a left-handed peripheral edge transition cone 26 is provided between the first left-handed peripheral edge 221 and the second left-handed peripheral edge 222 , and the taper of the left-handed peripheral edge transition cone 26 is 63 degrees.

Exemplarily, the relief angle of the left-handed peripheral edge 22 is sequentially provided with a first axial relief angle and a second axial relief angle from the cutting edge to the inside in the axial direction, and the first axial relief angle is 14 degrees. , the second axial relief angle is 20 degrees; the relief angle of the left-handed peripheral edge 22 is sequentially provided with a first radial relief angle and a second radial relief angle from the cutting edge to the inside in the radial direction. The first radial relief angle is 16 degrees, and the second radial relief angle is 30 degrees.

Exemplarily, the blade width corresponding to the first radial relief angle of the first left-handed peripheral blade 221 is 0.1 mm˜0.13 mm.

Exemplarily, the right-handed peripheral edge 23 and the second left-handed peripheral edge 222 are provided with a first radial relief angle and a second radial relief angle in turn from the cutting edge to the inside in the radial direction. A radial relief angle is 14 degrees, and the second radial relief angle is 30 degrees.

Exemplarily, the blade width corresponding to the first radial relief angle of the right-handed peripheral edge 23 and the blade width corresponding to the first radial relief angle of the second left-handed peripheral blade 222 are both 0.1 mm to 0.13 mm.

Exemplarily, the length of the staggered transition portion 25 in the axial direction is 0.15mm˜0.25mm.

Exemplarily, the taper of the X-shaped drill tip 24 is 90 degrees.

Exemplarily, the rake angle of the right-handed end edge 241 on the X-shaped drill tip 24 is 8 degrees to 10 degrees.

Exemplarily, the relief angle of the right-handed end edge 241 of the X-shaped drill tip 24 is sequentially provided with a first relief angle and a second relief angle from the cutting edge to the inside, and the first relief angle is 15 degrees to 18 degrees, The second relief angle is 30 degrees.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made. These improvements and replacements It should also be regarded as the protection scope of the present invention.

Claims (10)

1. a multi-position compound milling cutter for processing plastic, comprising a handle and a cutting portion arranged at one end of the handle, characterized in that the cutting portion comprises a cutter core and a blade formed on the outer surface of the cutter core, The knife core is coaxially connected to the knife handle, the front end of the knife core is tapered, the knife edge includes a left-handed peripheral edge and a right-handed peripheral edge, and the left-handed peripheral edge is arranged on a side close to the knife handle. On the side, the right-handed peripheral blade is arranged on the side away from the handle, the left-handed peripheral blade and the right-handed peripheral blade are connected by a staggered transition portion, and the tapered front end of the knife core is formed with an X The X-shaped drill tip is provided with a right-handed end blade, and the right-handed end blade is connected with the right-handed peripheral blade. 2 . The multi-station compound milling cutter for processing plastic according to claim 1 , wherein the helix angle of the left-handed peripheral edge is 20 to 25 degrees; the helix angle of the right-handed peripheral edge is 2 . 15 degrees to 25 degrees. 3 . The multi-station compound milling cutter for processing plastics according to claim 1 , wherein the core thickness of the top end of the cutter core is 0.9 mm. 4 . 4 . The multi-station compound milling cutter for processing plastics according to claim 3 , wherein the taper value of the core thickness of the cutter core expanding from the top to the shank is 0.2 degrees per side. 5 . 5 . The multi-station compound milling cutter for processing plastics according to claim 1 , wherein the left-handed peripheral edge is provided with a first left-handed peripheral edge and a second left-handed peripheral edge, and the first left-handed peripheral edge is provided with a first left-handed peripheral edge. 6 . The blade is arranged on the side close to the handle, the first left-handed peripheral blade is arranged on the side close to the right-handed peripheral blade, and the blade diameter of the second left-handed peripheral blade is larger than that of the first left-handed peripheral blade A left-handed peripheral edge transition cone is arranged between the first left-handed peripheral edge and the second left-handed peripheral edge, and the taper of the left-handed peripheral edge transition cone is 63 degrees. 6 . The multi-station compound milling cutter for processing plastics according to claim 5 , wherein the relief angle of the left-handed peripheral edge is sequentially provided with a first axial rear end from the cutting edge to the inner side in the axial direction. 7 . angle and the second axial relief angle, the first axial relief angle is 14 degrees, and the second axial relief angle is 20 degrees; the relief angle of the left-handed peripheral edge is in the radial direction from the cutting edge to the inside A first radial relief angle and a second radial relief angle are sequentially provided, the first radial relief angle is 16 degrees, and the second radial relief angle is 30 degrees. 7 . The multi-station compound milling cutter for processing plastic according to claim 6 , wherein the width corresponding to the first radial relief angle of the first left-handed peripheral edge is 0.1 mm˜0.13 mm. 8 . 8 . The multi-station compound milling cutter for processing plastics according to claim 5 , wherein the right-handed peripheral edge and the second left-handed peripheral edge are in order from the cutting edge to the inside in the radial direction. 9 . A first radial relief angle and a second radial relief angle are provided, the first radial relief angle is 14 degrees, and the second radial relief angle is 30 degrees; The blade width corresponding to the rearward angle and the blade width corresponding to the first radial relief angle of the second left-handed peripheral blade are both 0.1 mm to 0.13 mm. 9 . The multi-station compound milling cutter for processing plastics according to claim 1 , wherein the length of the staggered transition portion in the axial direction is 0.15 mm to 0.25 mm. 10 . 10. The multi-position compound milling cutter for processing plastic according to claim 1, wherein the taper of the X-shaped drill tip is 90 degrees; The rake angle is 8 degrees to 10 degrees; the relief angle of the right-handed end edge of the X-shaped drill point is sequentially provided with a first relief angle and a second relief angle from the cutting edge to the inside, and the first relief angle is 15 degrees to 15 degrees. 18 degrees, the second relief angle is 30 degrees.

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