CN2631676Y

CN2631676Y - Structural improvement of round blade hobbing

Info

Publication number: CN2631676Y
Application number: CN 03267245
Authority: CN
Inventors: 张新添
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-01
Filing date: 2003-07-01
Publication date: 2004-08-11
Anticipated expiration: 2013-07-01

Abstract

The utility model discloses a structure improvement of a round cutting edge milling cutter, which keeps the capacity of the arbor through the groove cuttings chute and the cutter bed at the end of the arbor. Therefore the number of the cutting edges and the cutter beds is multiplied. The circular conical surface of the round cutting edge is equipped with a supporting face that is flat-surface and oblique at a certain angle. The supporting face works in with the holding surface that is with an oblique angle from the cutter bed, which is efficient in positioning and preventing rotation slide. Moreover, the locking rigidity of the round cutting edge is improved and the milling capability as well as the feeding efficiency is increased. The improved structure combines the advantages of the round cutting edge and the square cutting edge.

Description

Dise knife blade milling cutter structural improvement

Technical field

The utility model relates to a kind of milling cutter, refers to a kind of dise knife blade milling cutter structural improvement especially.

Background technology

The dise knife sword end mill(ing) cutter of generally commonly using, main system is applied in the Milling Process of 3D three-dimensional mold because the tool point angle of square blade bursts apart easily, therefore give up need not, and adopt the preferable circular shear blade of rigidity to process three-dimensional mold.Though yet the easy embrittlement of square blade cutting edge, the preferable anxiety of skidding of not having in its location is considered, though and the circular shear blade rigidity good have poor location and cut can produce the phenomenon of rotation when stressed.As shown in Figure 8, the dise knife blade milling cutter of generally commonly using 1, terminal set appearance tool rest 12 of its knife bar 11 and chip area 13 be all by the radially Milling Process moulding of knife bar 11, so the following milling cutter of diameter phi 30mm only can be provided with two and hold tool rests 12, and diameter phi 35mm to 40mm also only has 3 to hold tool rests; The quantity of blade is fewer, and its relative cutting power, milling cutter feed rate more can be restricted and can't promote.

In addition, the appearance tool rest 12 of ccontaining dise knife sword 14 is along with the outward appearance of dise knife sword 14 is made as coniform, the phenomenon that will rotate because of vibrations when dise knife sword 14 cutting is stressed, it is not enough depending locking screw 15 alone, must influence milling to avoid dise knife sword 14 to rotate by compressing tablet 16 auxiliary locking dise knife swords 14.

See also shown in Figure 9, the dise knife sword 17 of progressive design has a taper seat 171, the bottom is provided with polygonal bolt 172, be provided with taper locating hole 181 and polygonal stopping surface 182 at appearance tool rest 18, when dise knife sword 17 is locked, by taper seat 171 and taper locating hole 181 generation fits location, and by the effect of polygonal bolt 172 with polygonal stopping surface 182 generation restriction rotations, make dise knife sword 17 unlikely generation rotation when cutting is stressed in view of the above, make dise knife sword 17 be able to smooth cutting.

Yet, the polygonal bolt 172 of aforementioned dise knife sword 17 has gap P (gap that is produced because of manufacturing) with 182 of polygonal stopping surfaces when dise knife sword 17 location, this gap value will cause dise knife sword 17 to produce low-angle deflection, as shown in figure 10, polygonal bolt 172 and polygonal shelves end between the face 182 and to produce low-angle rotation when existing gap P can cause dise knife sword 17 stressed, therefore the corner that causes polygonal bolt 172 and polygonal shelves only face 182 contact and stressed mutually, because of corner place lifting surface area is little, the conquassation phenomenon must be arranged.

See also shown in Figure 11, it is that milling cutter adds man-hour at oblique-feeding, cause dise knife to be subjected to the phenomenon of just reverse moment repeatedly, dise knife sword 17 adds man-hour at oblique-feeding, wherein the dise knife sword 17 of a side is subjected to cutting resistance R1 in A position (as shown in figure 12), and this cutting resistance R1 produces clockwise moment M to dise knife sword 17 _R1, seeing also shown in Figure 12,13, opposite side produces counterclockwise moment M at the dise knife sword 17 suffered cutting resistance R2 of position B to dise knife sword 17 _R2, the every Rotate 180 degree of cutter both can place-exchange, and bore counterclockwise moment M respectively _R2And clockwise moment M _R1, clockwise moment M _R1Will make the screw of dise knife sword 17 produce the strength that screws, counterclockwise moment M _R2Will make the screw of dise knife sword 17 produce the strength that unscrews; Under the moment loading repeatedly of this tight pine, the screw of dise knife sword 17 is easy to produce the phenomenon that gets loose, especially milling cutter is under the high speed rotating condition that per minute 2500 changes, each dise knife sword 17 per minute bears 2500 times tight, pine moment repeatedly, dise knife sword 17 will produce the phenomenon that gets loose soon, and screw will produce fatigue, and this also is the main cause of the necessary running check screw elasticity of dise knife blade milling cutter.

Above-mentioned reason will cause the cutting excision amount of milling cutter and feed rate can't promote always, and in general, milling cutter is under 2500 rev/mins condition, and the processing feed rate of milling cutter only can reach the 2000mm/ branch, and processing cost can't reduce; Reasons the such as therefore deficiency of edge of milling cutter quantity and blade locking rigidity is not good are the main causes that causes the milling feed rate not promote.

In sum, the locking rigidity of commonly using the dise knife blade milling cutter is not good, easily causes the phenomenon that shakes and rotate, cause the milling feed rate to promote again, in addition, hold the molding structure design of tool rest, the quantity that causes holding tool rest can't increase, thereby influences milling amount and feed rate.

The utility model content

The purpose of this utility model is to provide a kind of quantity that improves the blade installing, and has the good dise knife blade milling cutter structural improvement of rigidity and square blade location of circular blade concurrently.

For achieving the above object, technical solution of the present utility model is: a kind of dise knife blade milling cutter structural improvement, mainly tie up to the knife bar end and be provided with the appearance tool rest, these appearance tool rest central authorities are provided with the screw that runs through, can the lock dise knife sword of coniform body of this screw, and wherein: the chip area of a groove-like is established in this appearance tool rest top, the top end of this chip area is gradually the oblique hypotenuse of inclination outwardly, this appearance tool rest has two sides, and this side forms the abutment face on inclined plane, and the dise knife sword is resisted against on this abutment face.

Milling has one to allow groove on the knife bar body of this appearance tool rest top.

The coniform body that this dise knife sword is big up and small down, be symmetry on the edge of this circular cone and be the plane by face.

After adopting such scheme,, kept the knife bar volume because milling cutter knife bar end of the present utility model mills out chip area and holds tool rest with the groove formula, thus the quantity of can double blade and appearance tool rest; In addition, the taper seat of this dise knife sword be provided with plane and be the angle of inclination by face, its with hold the abutment face collocation that tool rest is the angle of inclination, can reach the effect of location and anti-rotation slip, and then can promote the locking rigidity of dise knife sword, thereby promote milling ability and feed rate.

Concrete face speech, structural improvement design of the present utility model, improved the shortcoming of commonly using and had following progressive effect:

1, dise knife sword quantity has more one times of located by prior art, is enough to promote milling amount and feed rate.

2, collection dise knife sword (the cutting edge rigidity is good) is unified with the advantage of square blade (anti-rotational slide), breaks through traditional design.

3, the dise knife cutlery have plane and be inclination by face, with hold abutment face that tool rest is inclination cooperatively interact the location can anti-rotational slide, and have best locking positioning function, can give up the compressing tablet of commonly using and strengthen locking, shock resistance is very high, can improve milling and feed rate relatively.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the utility model dise knife blade milling cutter;

Fig. 2 is the floor map of the utility model dise knife blade milling cutter;

Fig. 3 is the end view of the utility model dise knife blade milling cutter;

Fig. 4 is the vertical view of the utility model dise knife sword;

Fig. 5 is the front view of the utility model dise knife sword;

Fig. 6 is the upward view of the utility model dise knife sword;

Fig. 7 is the left view of the utility model dise knife sword;

Fig. 8 is a floor map of commonly using the dise knife blade milling cutter;

Fig. 9 is another assembled sectional view of commonly using the dise knife blade milling cutter;

Figure 10 is a dise knife blade milling cutter minute angle deflection schematic diagram shown in Figure 9;

Figure 11 commonly uses dise knife blade milling cutter oblique-feeding schematic diagram;

Figure 12 commonly uses the preceding stressed schematic diagram of apparent direction of dise knife blade milling cutter;

Figure 13 commonly uses the stressed schematic diagram of apparent direction behind the dise knife blade milling cutter.

Specific embodiment

At first see also Fig. 1 to shown in Figure 3, dise knife blade milling cutter 20 of the present utility model mainly is that the end at knife bar 21 is provided with and holds tool rest 22, these appearance tool rest 22 central authorities are provided with the screw 23 that runs through, above appearance tool rest 22, establish the chip area 24 of a groove-like, the top end of this chip area 24 is established and is gradually the oblique hypotenuse of inclination outwardly, reaches the function of chip removal in view of the above; This appearance tool rest 22 ties up to the end face of milling cutter knife bar 21, towards the axial milling of knife bar 21 and in the terminal moulding of knife bar 21, its formation has two sides and becomes the abutment face 221 of inclined plane type, for dise knife sword 30 against; On the knife bar body that holds above the tool rest 22, mill out the suitable groove 211 that allows, when making 30 installings of dise knife sword, edge can not hindered.

The coniform body that described dise knife sword 30 is big up and small down, the angle at this circular cone cutting edge place is about 7 °, the cone angle of Lower Half is 15 ° (as shown in Figure 7), on the surface on 15 ° the following taper seat edge, be provided with again one with the center vertical line be 5 ° plane (as shown in Figure 5), this plane is by face 31, and makes the face 31 that leans on of this moulding slightly be the shape that concaves.

The quantity that the utility model holds tool rest has more one times:

According to above-mentioned architectural feature, this appearance tool rest 22 and chip area 24 all are to take shape in knife bar 21 ends with line of rabbet joint shape, and hold tool rest 22 formation and have two abutment faces that take the form of inclined plane 221, hold tool rest 22 tops and only mill the knife bar volume that removes the part, therefore knife bar 21 is milled the finite volume that removes, be depicted as the embodiment of φ 25mm as Fig. 2,3, these knife bar 21 ends form four groups and hold tool rests 22 and chip area 24, therefore can install four dise knife swords 30, have more one times blade number than located by prior art.

The solid rigidity of dise knife sword pin of the present utility model is good:

See also Fig. 4 to shown in Figure 6, the cutting edge tapering of this dise knife sword 30 is 7 ° among Fig. 5, this makes cutting edge have preferable rigidity, and taper seat is made as 15 ° (as shown in Figure 7) down, its breach strengthens, when the high speed feed, can avoid producing the unprocessed position of striking work, 15 ° of positions of this time taper seat are (as Fig. 5, shown in 7) the surface on be provided with again and be 5 ° plane with the center vertical line, this plane is by face 31, and make the face 31 that leans on of this moulding slightly be the shape that concaves, and the angle of inclination that is identical also need be established by the angle of face 221 in the end of this appearance tool rest 22, again according to the actual measurement experience, the above hatching position of dotted line is only real effectively by face 31, see also shown in Figure 5ly, should slightly be the quadrangle shape by outward appearance of face 31, effectively big by the face area, therefore twisting resistance that can bear and compressive stress also promote relatively, thereby can be applied in the bigger milling condition of milling amount.

Dise knife sword 30 is locked in by screw 40 and holds on the tool rest 22, the abutment face 221 by face 31 and appearance tool rest 22 both sides on these dise knife sword 30 taper seats is conical surface location and locking, two abutment faces 221 are fixed dise knife sword 30 and the phenomenon of unlikely generation rotation, characteristics as square blade, and therefore the blade that locks fully can improve fully and commonly use shortcoming.

By the said structure feature, the utility model locking has four dise knife swords 30, and the rigidity of locking and location is good, with commonly use the dise knife blade milling cutter and be under the identical speed conditions, the processing feed rate that the utility model can carry out is the 5000mm/ branch, has more 2.5 times of located by prior art fully, improves 2.5 times processing speed, to shorten machining period greatly, promote the competitiveness of industry.

In sum, the utility model is broken through traditional design, collection circular edge and square blade (or The polygon blade) advantage unification is so that circular edge of the present utility model is difficult for bursting apart except having Advantage outside, its locking and positioning and rigid are good, the anxiety that does not have rotation is considered, and the blade number doubly Increase, milling ability and milling feed rate are promoted, solve 3D mould engraving dealer's fully Be stranded shape.

Claims

1, a kind of dise knife blade milling cutter structural improvement, mainly tie up to the knife bar end and be provided with the appearance tool rest, these appearance tool rest central authorities are provided with the screw that runs through, can the lock dise knife sword of coniform body of this screw, it is characterized in that: the chip area of a groove-like is established in this appearance tool rest top, and the top end of this chip area is gradually the oblique hypotenuse of inclination outwardly, and this appearance tool rest has two sides, this side forms the abutment face on inclined plane, and the dise knife sword is resisted against on this abutment face.

2, dise knife blade milling cutter structural improvement as claimed in claim 1 is characterized in that: milling has one to allow groove on the knife bar body of this appearance tool rest top.

3, dise knife blade milling cutter structural improvement as claimed in claim 1 is characterized in that: the coniform body that this dise knife sword is big up and small down, be symmetry on the edge of this circular cone and be the plane by face.