CN1233493C

CN1233493C - Integrated milling-rutter

Info

Publication number: CN1233493C
Application number: CN 03124746
Authority: CN
Inventors: 朱学明; 屈建国
Original assignee: Shenzhen Jinzhou Precision Technology Corp
Current assignee: Shenzhen Jinzhou Precision Technology Corp
Priority date: 2003-08-20
Filing date: 2003-08-20
Publication date: 2005-12-28
Anticipated expiration: 2023-08-20
Also published as: CN1488466A

Abstract

The present invention provides a single blade integrated milling cutter provided with a sharp spiral cutting blade and a big swarf discharging slot. The single blade integrated milling cutter comprises a cutter handle and a cutter body, wherein the cutter body comprises a front cutter surface which comprises a side cutter blade, a corresponding bottom blade and a spiral slot, and a plurality of spiral back cutter surfaces, and a spiral lead angle of the side cutter blade is beta. Only one side cutter blade and one bottom blade are arranged. A front angle called as gamma is from 25 degrees to 30 degrees. The shape of the cross section of the spiral slot of the front cutter surface is a section of circular arc, and the volume of the spiral slot is 35% to 48% of the volume of the cutter body. The back cutter surface comprises a spiral main back cutter surface and a plurality of aequilate auxiliary back cutter surfaces uniformly distributed along the circumference, wherein the width of the spiral main back cutter surface is b. The single blade integrated milling cutter has the advantages of little cutting resistance, fast cutting operation, high processing surface smoothness, large swarf discharging space, easy swarf discharge, good intensity of the cutter body, little friction between the cutting blade and a processing surface, and little heat generation. The single blade integrated milling cutter is suitable for the finish machining of flexible materials.

Description

A kind of Integral milling cutter

Technical field

The present invention relates to a kind of Integral milling cutter, especially process the Integral milling cutter of flexible material.

Background technology

The Integral milling cutter of producing both at home and abroad at present and using is twolip or multiple-cutting-edge, this milling cutter is because of being subjected to structure influence monodentate chip removal space less, the chip pocket area accounts for the gross area 10～20% in the radial section, anterior angle also is restricted, be generally less than 15 °, influence the sharp of cutting edge, smear metal is difficult to discharge during flexible material such as processing TEFLON plate, nylon resin, carbon fibre, polymer composite, the workpiece edges of boards easily produce burr, can not adapt to the fine finishining needs; Especially when the glasses of processing flexible printed-circuit board, CD laser disc, resin material, because machined surface and aperture and pitch of holes are little, require the dimensional accuracy height and surface roughness is little, and these material tearing toughness height, poor thermal conductivity, the smear metal that is produced is strip, easily blocks and easily cause adding the thermal deformation division in man-hour.

Summary of the invention

The present invention overcomes above-mentioned deficiency, and a kind of Integral milling cutter with sharp spiral cutting sword and big chip area is provided, and is used for the fine finishining of flexible material.

Integral milling cutter of the present invention, comprise shank portion and cutter hub part, cutter hub part is that knife face constituted after the front cutting edge of helical form main cutting edge, the cutter hub end of β, rake face that spiral grooves constitutes and a plurality of helical form by spiral angle on the knife back, and the quantity of its main cutting edge and front cutting edge is one.

Integral milling cutter anterior angle γ of the present invention is 25～30 °.

Form the spiral grooves of rake face in the Integral milling cutter of the present invention, its radial section shape approximation is one section circular arc, by guaranteeing with the corresponding grinding wheel section shape in sword footpath, its radius R ≈ 1/2 knife back diameter d r, the volume of spiral grooves account for the cutter hub part when comprising spiral grooves the entity volume 35%～48%.

Integral milling cutter of the present invention, knife face is that b and relief angle are a by width after its helical form ₁A helical form master after knife face, a plurality of relief angle be a ₂And with knife back place cylindrical d _rFor the wide uniform minor flank of circumscribed circle is formed.

Integral milling cutter of the present invention, anterior angle be more than or equal to 25 °, 30 ° of up, cutting edge is very sharp, significantly reduces cutting resistance, cut brisk, the processed surface smoothness height; Form the helical form chip area of rake face, the sectional area of spiral grooves accounts for 35%～48% of cutter hub total sectional area, and promptly the chip area volume accounts for 35%～48% of cutter hub entity volume, has increased the chip removal space significantly, and it is smooth and easy that smear metal is discharged; The continuous major and minor back knife face that designs on the cutter hub can guarantee the intensity that cutter hub is enough, can reduce the friction between cutting edge and machined surface again, prevents heating.Single-blade Integral milling cutter of the present utility model has a sharp especially spiral cutting sword and very big chip removal space, can satisfy the fine finishining of flexible material fully.Experimental result shows, the whole single-blade milling cutter of the utility model, processing flexible printed-circuit board, TEFLON plate, nylon resin, carbon fibre, polymer composite, can adopt high rotational speed and feed velocity, working (machining) efficiency improves 1～2 times, workpiece surface finish obviously improves, and can reach Ra0.4～Ra1.6: when adopting carbide alloy as the material of the whole single-blade milling cutter of the utility model, processing effect is better.

Description of drawings

Fig. 1 is a front view of the present invention;

Fig. 2 is a vertical view of the present invention;

Fig. 3 is a left view of the present invention;

Fig. 4 is the revolved view of A-A in the vertical view of the present invention.

The specific embodiment

The invention will be further described below in conjunction with accompanying drawing.

Integral milling cutter of the present invention, form by shank portion 1 and cutter hub part 2, cutter hub part 2 is made of main cutting edge 5, front cutting edge 6, rake face 3 and back knife face 4 again, the helical angle of main cutting edge 5 is β, corresponding front cutting edge 6, rake face 3 by spiral grooves constitute, back knife face 4 is that b and relief angle are a by width ₁A helical form master after knife face 7 and a plurality of relief angle be a ₂And with knife back place cylindrical d _rFor circumscribed circle and the wide helical form minor flank that is uniformly distributed along the circumference 8 constitute.

Specific design parameter among the embodiment is as follows:

	Embodiment 1	Embodiment 2	Embodiment 3
	Embodiment 1	Embodiment 2	Embodiment 3	Cutter hub external diameter ( d)	1.5 ⁰ _-003	3.0 ⁰ _-0.03	6.5 ⁰ _-0.04
Knife back external diameter ( d _r)	1.3	2.70	6.10	Cutter hub external diameter ( d)	1.5 ⁰ _-003	3.0 ⁰ _-0.03	6.5 ⁰ _-0.04
Knife back external diameter ( d _r)	1.3	2.70	6.10	Lead angle (β)	25	25	30
Anterior angle (γ)	25	28	30	Lead angle (β)	25	25	30
Anterior angle (γ)	25	28	30	Primary clearance (a ₁)	15	15	15
Front clearance (a ₂)	30	30	30	Primary clearance (a ₁)	15	15	15
Front clearance (a ₂)	30	30	30	Back knife face width (b)	0.10	0.16	0.2
Chip area arc surface radius (R)	0.8	1.5	2.8	Back knife face width (b)	0.10	0.16	0.2
Chip area arc surface radius (R)	0.8	1.5	2.8	The chip area volume accounts for the cutter hub percent by volume	35％	39％	47％
Milling cutter rotating speed (n)	1.2000r/min	2.4000r/min	1.8000r/min		35％	39％	47％
Milling cutter rotating speed (n)	1.2000r/min	2.4000r/min	1.8000r/min	Feed velocity (f)	0.6m/min	4m/min	3m/min
Machined surface fineness (Ra)	Ra0.4	Ra0.8	Ra1.6	Feed velocity (f)	0.6m/min	4m/min	3m/min

The quantity of main cutting edge 5 and front cutting edge 6 is one, and main cutting edge 5 anterior angle γ are designed to 25～30 °, and optimum is 30 °; The shape of cross section of the spiral grooves of rake face 3 is one section circular arc of R for approximate radius, and R ≈ 1/2d _r, the volume of spiral grooves is 35%～48% of the entity volume of cutter hub part 2 when comprising groove.

Owing to have only a main cutting edge, anterior angle can be designed to higher value (25～30 °), substantially exceed conventional multiple-cutting-edge milling cutter (less than 15 °), make cutting edge very sharp, rake face spiral grooves radial section area is that the chip area sectional area is 35%～48% of a cutter hub total cross section cutter hub 2, be 35%～48% of the volume of the spiral grooves entity volume when reaching cutter hub part 2 and comprising groove, chip area is very big; And the continuous major and minor back knife face of design on cutter hub 2.Such milling cutter is in that to add the man-hour cutting resistance little, cut brisk, the processed surface smoothness height, smear metal is simultaneously discharged smooth and easy, can guarantee the intensity that cutter hub is enough, has reduced the friction between cutting edge and machined surface again, reduce heating, prevented the thermal deformation division phenomenon of machined material.

The present invention is applied widely, can be used for the common process of flexible material, the especially fine and fine finishining of flexible material, and higher, the longer service life of cutter intensity when adopting the carbide alloy material, machined surface quality is better, and working (machining) efficiency is higher.

Claims

1, a kind of Integral milling cutter, comprise shank portion (1) and cutter hub part (2), cutter hub part (2) by spiral angle on the knife back by the front cutting edge (6) of the helical form main cutting edge (5) of β, cutter hub end, rake face (3) that spiral grooves constitutes and helical form after knife face (4) constituted, it is characterized in that: the quantity of described main cutting edge (5) and front cutting edge (6) is one, described rake face (3) is one, and back knife face (4) is a plurality of.

2, Integral milling cutter as claimed in claim 1 is characterized in that: anterior angle γ is 25～30 °.

3, Integral milling cutter as claimed in claim 1 or 2 is characterized in that: the radial section of the spiral grooves of described rake face (3) is shaped as one section approximate circular arc, by guaranteeing its radius R ≈ 1/2 knife back diameter d with the corresponding grinding wheel section shape of blade _rThe volume of described spiral grooves is 35%～48% of described cutter hub part (2) entity volume that comprises spiral grooves.

4, Integral milling cutter as claimed in claim 1 or 2 is characterized in that: knife face after the described helical form (4) is that b and relief angle are a by width ₁A helical form master after knife face (7), a plurality of relief angle be a ₂And with knife back place cylindrical d _rFor the wide uniform minor flank (8) of circumscribed circle is formed.

5, Integral milling cutter as claimed in claim 3 is characterized in that: knife face after the described helical form (4) is that b and relief angle are a by width ₁A helical form master after knife face (7), a plurality of relief angle be a ₂And with knife back place cylindrical d _rFor the wide uniform minor flank (8) of circumscribed circle is formed.