CN205650877U - Thick milling cutter of broken teeth - Google Patents

Abstract

The utility model provides a rough milling cutter with broken teeth, which comprises: a head, a transition part connected with the head, and a shank connected with the transition part, the head is provided with a plurality of cutting edges and is located at the Chip flutes between adjacent cutting edges, wherein the plurality of cutting edges have a structure of evenly distributed broken teeth. By designing the cutting part as a broken tooth structure, while enhancing its chip breaking ability, the rigidity of the broken tooth is enhanced, the possibility of broken teeth due to insufficient strength is reduced, the overall strength of the tool is increased, and the life and quality of the tool are improved. Abrasion resistance; this tooth-breaking rough milling cutter has a long service life when machining vortex grooves, and can maintain a good chip breaking function; this tooth-breaking rough milling cutter is widely used in milling vortex grooves.

Description

A broken tooth rough milling cutter

technical field

The utility model belongs to the technical field of milling cutters, in particular to a rough milling cutter with broken teeth.

Background technique

To process the groove in the vortex shell, since the blank contains pre-groove, a rough milling cutter is used to process the milling groove in the center, the depth of cut is 4xd1 (d1 is the diameter of the cutter blade), and both sides of the milling cutter participate in cutting at the same time, and the cutting width is about 1mm respectively. The line speed is 70m/min, and the feed is 0.14mm/r per revolution. The workpiece material is HT250, and the hardness is about HB220. It is required that the straightness of the groove wall is better up and down, and the expected tool life is reached.

In the rough machining of the scroll groove, because the groove of the scroll shell is deep, a tool with a relatively large length and diameter is required, and both sides of the milling cutter participate in the cutting at the same time, and the down milling and up milling are carried out alternately, and the force is unbalanced. It will lead to poor chip breaking or even tool breakage, which will affect the tool life.

Therefore, it is necessary to design a new rough milling cutter.

Utility model content

The purpose of the utility model is to provide a broken tooth rough milling cutter which increases the overall strength of the cutter and improves the life and wear resistance of the cutter.

The utility model discloses a broken tooth rough milling cutter, which comprises: a head, a transition part connected with the head, and a shank connected with the transition part, the head is provided with a plurality of cutting edges and is located at the Chip flutes between adjacent cutting edges, wherein the plurality of cutting edges have a structure of evenly distributed broken teeth.

By designing the cutting part as a broken tooth structure, while strengthening its chip breaking ability, it also enhances the rigidity of the broken tooth, reduces the possibility of broken teeth due to insufficient strength, increases the overall strength of the tool, and improves the life and quality of the tool. abrasion resistance.

Wherein, each cutting edge includes a conical flank at the rear and a rake face at the front.

Wherein, there are three broken tooth structures.

Wherein, the vortex broken tooth rough milling cutter according to claim 3 is characterized in that: the broken tooth structure includes a first tooth, a second tooth, and a third tooth arranged in a circle, and the first tooth, the second tooth The teeth and the third teeth are respectively provided with a plurality of circular arc segments arranged at equal intervals and of the same size, and the distance between the first circular arc segment of each tooth and the end edge of the cutting edge is not the same.

By staggering the first arc segment of the three teeth, the rigidity of the rough milling cutter is enhanced, and the resonance generated during the cutting process is reduced.

Wherein, the distance between the first arc segment of the first tooth and the corresponding cutting end edge is L1, the distance between the first arc segment of the second tooth and the corresponding cutting end edge is L2, and the third The distance between the first arc segment of the tooth and the corresponding cutting end edge is L3, where L1<L2<L3.

Wherein, L1=(0.2-0.25)*d1, L2=(0.3-0.35)*d1, L3=(0.4-0.45)*d1, wherein, d1 is the diameter of the head.

Wherein, the distance between two adjacent arc segments is t, t=(0.45˜0.5)*d1, wherein, d1 is the diameter of the head.

Wherein, the depth of each arc segment is p, p=(0.03˜0.04)*d1, wherein, d1 is the diameter of the head.

Wherein, the diameter of the head portion is the same as that of the transition portion.

Wherein, the diameter of the shank is greater than or equal to the diameter of the head.

The tooth-broken rough milling cutter has a long service life when machining vortex grooves, and can maintain a good chip breaking function; the tooth-broken rough milling cutter is widely used in milling vortex grooves.

Description of drawings

Fig. 1 is the structural representation of the utility model broken tooth rough milling cutter;

Fig. 2 is a structural schematic diagram of the head of the tooth-broken rough milling cutter shown in Fig. 1;

Fig. 3 is a sectional view of the head shown in Fig. 1 in the A-A direction;

Fig. 4 is the structure schematic diagram of the rough milling cutter with broken teeth of the present invention;

Fig. 5 is a cross-sectional view of the head of the rough milling cutter with broken teeth shown in Fig. 4;

Fig. 6 is a schematic diagram of the shape of the first tooth of the tooth-broken rough milling cutter shown in Fig. 5;

Fig. 7 is a schematic diagram of the shape of the second tooth of the broken tooth rough milling cutter shown in Fig. 5;

Fig. 8 is a schematic diagram of the shape of the third tooth of the tooth-broken rough milling cutter shown in Fig. 5 .

detailed description

The utility model discloses a tooth-broken rough milling cutter, which is used for high-speed, super-hard precision cutters in advanced mechanical equipment and devices in automatic machinery and equipment, specifically a round tooth-broken rough machining end mill, which can be applied For the rough machining of the scroll shell.

As shown in Fig. 1, the broken tooth rough milling cutter 100 comprises: a head 10, a transition part 20 connected with the head 10, and a shank 30 connected with the transition part 20, wherein the transition part 20 shown One end is connected with the handle 30 , and the other end of the transition part 20 is connected with the head 10 .

The head 10 is provided with three cutting edges 11 at equal intervals, and chip removal grooves 12 are arranged between adjacent cutting edges 11 .

The diameter of the head 10 is d1, and the length of the head 10 is L4, which is generally 3 to 5 mm larger than the milling depth to ensure sufficient milling depth; the diameter of the transition part 20 is also d1, and the transition part 20 Compared with the head 10, the chip flute 12 and the cutting edge 11 are not processed; the diameter of the shank 30 is d2, and in general, d2 is greater than or equal to the smallest even value of d1, and the length of the shank 30 is L5 is designed according to the standard DIN6535-HA; the total length of the broken tooth rough milling cutter 100 is L6, and L6 is the sum of the lengths of the head 10, the transition portion 20 and the handle 30.

Referring to FIGS. 2 and 3 , each cutting edge 11 includes a conical flank 15 at the rear and a rake face 14 at the front.

The profile of the cutting edge 11 of the rough milling cutter 1 is a uniformly distributed circular broken tooth structure, and the entire cutting edge 11 is a circular broken tooth structure, and the circular broken teeth are perpendicular to the axis of the rough milling cutter 1, and It has a radial relief angle of 5° to 10°.

The contour of the cutting part of the spiral groove circular broken tooth rough milling cutter is designed as a circular broken tooth end mill, except for the cutting edge 11, chip removal groove 12 and shank 30 of the normal milling cutter (as shown in the figure 1), the cutting edge 11 has a uniformly distributed circular broken tooth structure, and there are three circular broken tooth structures.

By designing the cutting part as a broken tooth structure, while enhancing its chip breaking ability, the rigidity of the broken tooth is enhanced, the possibility of broken teeth due to insufficient strength is reduced, the overall strength of the tool is increased, and the life and quality of the tool are improved. abrasion resistance.

Please refer to FIGS. 4 and 5, the circular broken tooth structure includes first teeth 15, second teeth 16, and third teeth 17 arranged in a circle. Please refer to FIGS. 6 to 8, the first The tooth 15 , the second tooth 16 , and the third tooth 17 are respectively provided with a plurality of circular arc segments 151 , 161 , 171 arranged at equal intervals and having the same size.

The distance between the first arc segment 151 of the first tooth 15 and the cutting end edge of the rough milling cutter is L1; the distance between the first arc segment 151 of the second tooth 16 and the cutting end edge of the rough milling cutter is L2; the distance between the first arc section of the third tooth 17 and the cutting end edge of the rough milling cutter is L3, wherein, the L1, L2, and L3 are all different, that is: the first of each tooth The distances between the arc segments and the cutting edge are all different. In this embodiment, L1<L2 is smaller than L3.

Wherein, L1=(0.2～0.25)*d1, L2=(0.3～0.35)*d1, L3=(0.4～0.45)*d1, d1 is the diameter of the head 10

By staggering the first arc segment of the three teeth, the rigidity of the rough milling cutter is enhanced, and the resonance generated during the cutting process is reduced.

The distance between two adjacent circular arc segments 151, 161, 171 is t, t=(0.45～0.5)*d1, by ensuring a certain distance between two adjacent circular arc segments, a reasonable chip length is ensured; each The radius of each arc segment 151, 161, 171 is R, and R is equal to (0.1-0.15)*d1; the depth of each arc segment 151, 161, 171 is p, and p is equal to (0.03-0.04)*d1, reasonable The radius and depth of the tool enable the tool to maintain a good chip breaking function during the cutting process, and enhance the rigidity of the broken tooth. The parameters of the arc segment can be adjusted according to the diameter of the tool and different applications.

By designing the cutting part as a broken tooth structure, while strengthening its chip breaking ability, it also enhances the rigidity of the broken tooth, reduces the possibility of broken teeth due to insufficient strength, increases the overall strength of the tool, and improves the life and quality of the tool. abrasion resistance.

The tooth-broken rough milling cutter has a long service life when machining vortex grooves, and can maintain a good chip breaking function; the tooth-broken rough milling cutter is widely used in milling vortex grooves.

The specific embodiments of the utility model have been described in detail above, but the content is only a typical embodiment of the utility model creation, and cannot be considered as limiting the implementation scope of the utility model creation. All equal changes and improvements made according to the invention scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (10)

1. A tooth-broken rough milling cutter, characterized in that it comprises: a head, a transition portion connected with the head portion, and a shank connected with the transition portion, the head portion is provided with a plurality of cutting edges and The chip flutes located between the adjacent cutting edges, wherein the plurality of cutting edges have a structure of evenly distributed broken teeth. 2. The broken-tooth rough milling cutter according to claim 1, wherein each cutting edge comprises a rearward conical flank and a frontal rake. 3. The rough milling cutter with broken teeth according to claim 1 or 2, characterized in that there are three broken teeth structures. 4. The broken-tooth rough milling cutter according to claim 3, characterized in that: the broken-tooth structure comprises a first tooth, a second tooth, and a third tooth arranged in a circle, and the first tooth, the second tooth The , and third teeth are respectively provided with a plurality of circular arc segments arranged at equal intervals and of the same size, and the distance between the first circular arc segment of each tooth and the end edge of the cutting edge is not the same. 5. The tooth-broken rough milling cutter according to claim 4, characterized in that: the distance between the first arc segment of the first tooth and the corresponding cutting end edge is L1, and the first arc segment of the second tooth is The distance between the arc segment and the corresponding cutting end edge is L2, and the distance between the first arc segment of the third tooth and the corresponding cutting end edge is L3, wherein L1<L2<L3. 6. The rough milling cutter with broken teeth according to claim 5, characterized in that: L1=(0.2～0.25)*d1, L2=(0.3～0.35)*d1, L3=(0.4～0.45)*d1, wherein , d1 is the diameter of the head. 7. The rough milling cutter with broken teeth according to claim 3, characterized in that: the distance between two adjacent arc segments is t, t=(0.45～0.5)*d1, wherein, d1 is the head diameter of. 8. The tooth-broken rough milling cutter according to claim 3, wherein the depth of each arc segment is p, where p=(0.03-0.04)*d1, where d1 is the diameter of the head. 9. The tooth-broken rough milling cutter according to claim 1, wherein the diameter of the head portion is the same as the diameter of the transition portion. 10. The tooth-broken rough milling cutter according to claim 1 or 2, characterized in that: the diameter of the shank is greater than or equal to the diameter of the head.