CN220050183U - A kind of front waveform discrete edge end mill - Google Patents

Abstract

The utility model discloses a front waveform discrete edge end mill, which consists of a cutter handle and an edge part, wherein the edge part is provided with four peripheral edges and four end edges, the front cutter surface of the peripheral edge is of a waveform curved surface structure along the spiral line direction of the peripheral edge, the peripheral edge is provided with chip dividing grooves, the peripheral edge is divided into two types according to the number and distribution positions of the chip dividing grooves on the peripheral edge, the first type of peripheral edge is provided with four wide chip dividing grooves, the wide chip dividing grooves are positioned at the trough positions, the second type of peripheral edge is provided with three narrow chip dividing grooves, the narrow chip dividing grooves are positioned at the crest positions, and the types of two adjacent peripheral edges are different. The chip dividing groove can be used in rough machining, the designed chip dividing groove can reduce axial milling force, the heat dissipation performance of a cutter is improved, the wave-shaped curved surface structure enables the cutter material to be high in removal rate, the chip containing space is large, and the chip removing fluency is improved.

Description

A kind of front waveform discrete edge end mill

Technical field

The utility model relates to the technical field of milling tools, in particular to a front waveform discrete edge end mill.

Background technique

The end mill is a commonly used processing tool for CNC machine tools. In the rough machining of some deep-cavity parts, the high material removal rate and large axial depth of cut result in longer chips, which are difficult to discharge. , will also curl around the tool, exacerbating the friction between the tool and the workpiece, causing the temperature to rise, and reducing the service life of the tool.

The utility model proposes a front waveform discrete edge end mill. The designed peripheral edge rake surface of the end mill has a wavy curved surface structure along the direction of the peripheral edge spiral, which increases the chip space of the end mill and facilitates material removal. rate is higher. At the same time, there is a chip groove on the peripheral edge, which reduces the length of chips generated during machining and makes them easier to discharge. The chip grooves on the peripheral edge can reduce axial milling forces and improve the heat dissipation performance of the tool.

Utility model content

In order to solve the problem of high removal rate of rough machining materials and difficulty in chip removal due to long chips, the utility model provides a front waveform discrete edge end mill.

The technical solution provided by the utility model is: a front waveform discrete edge end mill, which is an integral end mill composed of a handle 1 and a blade 2. The blade is composed of four peripheral blades, each of which is There are chip grooves on the blade.

Further, the overall size of the front waveform discrete edge end mill is 105mm, the diameter is 20mm, the core thickness H is 12mm, the blade length is 40mm, and the helix angle is 30°.

Further, the front waveform discrete edge end mill has a circumferential edge rake angle γ _z of 10°, a rake face width B ₁ of 2 mm, a circumferential edge first clearance angle α _z1 of 10°, and a circumferential edge first flank surface. The width B _az1 is 1.5mm, the second flank angle α _z2 of the peripheral edge is 15°, the width B _az2 of the second flank surface of the peripheral edge is 1.5mm, the edge groove curve radius R ₁ is 2.53mm, and R ₂ is 7.12mm. .

Further, the first relief angle α _d1 of the end edge of the front waveform discrete edge end mill is 10°, the first relief surface width B _{ad1 of} the end edge is 2 mm, and the second relief angle α _d2 of the end edge is 15°.

Further, the peripheral edge rake surface of the front waveform discrete edge end mill has a wavy curved surface structure along the direction of the peripheral edge spiral. The distance between the wave peak and the trough is: K ₃ =1.5mm, and the length of a single waveform curved surface structure is: K ₂ =10mm.

Further, the peripheral edge of the front waveform discrete edge end mill is divided into two categories according to the number and distribution position of the chip breakers. The first type of peripheral edge has four wide chip breakers, and the wide chip breakers are located at At the trough position, the distance between the wide chip groove closest to the end edge and the end edge is K ₁ =5mm. There are three narrow chip grooves on the second type of peripheral edge. The narrow chip grooves are located at the wave crest position, and the one closest to the end edge is The distance between the narrow chip groove and the end edge K ₂ =10mm, and the two adjacent peripheral edges are of different types; the width of the front groove of the wide chip groove at the trough position C ₁ =1.2mm, the depth is 1mm, and the rear groove width C ₂ =1.5mm, depth is 1.3mm; the width of the front groove of the narrow chip dividing groove at the wave peak position is U ₁ =1mm, the depth is 1mm, the width of the rear groove U ₂ =1.4mm, the depth is 1.2mm, the shape of the chip dividing groove is as follows In the shape of a strip curve, the spline curve is constrained by the end points on both sides of the groove width and the end points of the groove depth.

Beneficial effects of this utility model:

The rake surface of the peripheral edge is designed as a wavy surface structure along the spiral line of the peripheral edge, which increases the chip space of the tool. A higher feed per tooth can be selected to increase the material removal rate and the tool's machining efficiency is higher. .

The chip grooves on the peripheral edge can reduce the axial milling force, making the chips easier to break, and will not produce curled long chips. The chips are easier to discharge, improving the smoothness of chip removal. The chip grooves also improve the heat dissipation performance of the tool. Extended tool life.

Description of the drawings

In order to more intuitively explain the technical solutions in the examples and technical requirements of the present invention, the following is an example diagram showing the technical requirements.

Figure 1 is an overall structural diagram of the utility model;

Figure 2 is a cross-sectional view of the blade taken at A-A in Figure 1;

Figure 3 is an enlarged view of the end blade of the present utility model;

Figure 4 is an expanded view of the peripheral blade of the present utility model;

Figure 5 is a partial enlarged view of the chip grooves on the two types of peripheral cutting edges of the present invention;

Figure 6 is a shape diagram of the chip separator of the present invention.

Reference signs: 1. Handle; 2. Blade; 3. Peripheral edge; 3-1, First type of circumferential edge; 3-2, Second type of circumferential edge; 4. Peripheral edge rake surface; 5. Points Chip flute; 5-1. Wide chip flute on the first type of peripheral edge; 5-2. Narrow chip flute on the second type of peripheral edge; 6. Waveform surface structure; 7. End edge; 8. Peripheral edge Spiral; 9. Wave crest; 10. Wave trough; 11. Circumferential flank; 12. Endpoints on both sides of the groove width of the chip divider; 13. Endpoints of the groove depth of the chip divider.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a front waveform discrete edge end mill includes a tool handle 1, a blade 2, four peripheral edges 3 and four end edges 7. The overall size is 105mm, the diameter is 20mm, and the blade length is 40mm. , the helix angle is 30°.

As shown in Figures 2 and 3, the core thickness H is 12mm, the circumferential edge rake angle γ _z is 10°, the rake face width B ₁ is 2mm, the circumferential edge first clearance angle α _z1 is 10°, and the circumferential edge first clearance angle α z1 is 10°. The flank width B _az1 is 1.5mm, the second flank angle α _z2 of the peripheral edge is 15°, the width B _az2 of the second flank surface of the peripheral edge is 1.5mm, the groove curve radius R ₁ of the edge 2 is 2.53mm, R ₂ is 7.12mm; the first relief angle α _d1 of the end edge is 10°, the first flank width B _{ad1 of} the end edge is 2mm, and the second relief angle α _d2 of the end edge is 15°.

As shown in Figures 4 and 5, the peripheral edge rake surface 4 is a wavy curved surface structure 6 along the direction of the peripheral edge spiral 8. The distance between the crest 9 and the trough 10 is: K ₃ =1.5mm, a single wavy surface The length of structure 6 is: K ₂ =10mm. The peripheral cutting edge 3 is divided into two categories according to the number and distribution position of the chip dividing grooves 5 on the peripheral cutting edge 3. The first type of peripheral cutting edge 3-1 has four wide chip dividing grooves 5-1 and a wide chip dividing groove 5-1. Located at the trough 10, the distance between the wide chip groove 5-1 closest to the end edge 7 and the end edge 7 is: K ₁ = 5mm. There are three narrow chip grooves 5- on the second type of peripheral edge 3-2. 2. The narrow chip groove 5-2 is located at the crest 9. The distance between the narrow chip groove 5-2 closest to the end edge 7 and the end edge 7 is: K ₂ =10mm, and the two adjacent peripheral edges 3 The types are different; the wide chip-dividing groove 5-1 at the trough position 10 has a front groove width C ₁ = 1.2mm and a depth of 1mm, a rear groove width C ₂ = 1.5mm and a depth of 1.3mm; a narrow chip-dividing groove at the crest 9 position 5-2 The width of the front groove U ₁ =1mm, the depth is 1mm, the width of the rear groove U ₂ =1.4mm, the depth is 1.2mm, the shape of the chip dividing groove 5 is a spline curve, and the spline curve is formed by the groove of the chip dividing groove 5 It is constrained by the end points 12 on both sides of the width and the end points 13 of the groove depth.

The specific embodiments are only explanations of the present utility model, and they are not limitations of the present utility model. Those skilled in the art can make modifications to the present embodiments without creative contribution as needed after reading this description. However, as long as the present utility model is are protected by patent law within the scope of their claims.

Claims (3)

1. A front waveform discrete edge end mill characterized by: including handle of a knife (1) and cutting part (2), cutting part (2) comprise four week cutting edges (3) and four end cutting edges (7), and week cutting edge rake face (4) are wave form curved surface structure (6) along week cutting edge helix (8) direction, are equipped with chip breaking grooves (5) on week cutting edge back cutting face (11), and chip breaking grooves (5) distribution position and quantity are different on two adjacent week cutting edges (3).

2. The front waveform discrete edge end mill of claim 1, wherein: the peripheral edge rake face (4) is of a wave-shaped curved surface structure (6) along the direction of a peripheral edge spiral line (8), and the distance between a wave crest (9) and a wave trough (10) is as follows: k (K) ₃ =1.5mm, the single wave curved surface structure (6) length is: k (K) ₂ ＝10mm。

3. According to claimThe front waveform discrete edge end mill of claim 1, wherein: the peripheral edge (3) is divided into two types according to the number and distribution positions of the chip dividing grooves (5), four wide chip dividing grooves (5-1) are arranged on the peripheral edge (3-1) of the first type, the wide chip dividing grooves (5-1) are positioned at the positions of the wave troughs (10), and the distance K between the wide chip dividing grooves (5-1) closest to the end edge (7) and the end edge (7) ₁ The second type of peripheral edge (3-2) is provided with three narrow chip-dividing grooves (5-2), the narrow chip-dividing grooves (5-2) are positioned at the wave crest (9), and the distance K between the narrow chip-dividing groove (5-2) closest to the end edge (7) and the end edge (7) ₂ =10mm, and the kinds of adjacent two peripheral edges (3) are different; width C of front groove of wide chip dividing groove (5-1) at position of trough (10) ₁ =1.2 mm, depth 1mm, backset width C ₂ =1.5 mm, depth 1.3mm; narrow flute (5-2) front flute width U at peak (9) position ₁ =1mm, depth 1mm, back groove width U ₂ The chip dividing groove (5) is in a spline curve shape, and the spline curve is formed by restraining groove width two side end points (12) and groove depth end points (13) of the chip dividing groove (5).