SU1458089A2 - Cutting tool with continuously-rotated circular cutting edge - Google Patents

Abstract

The invention relates to the field of metal cutting, namely to rotary cutting, and can be used in the processing of parts from various materials. The aim of the invention is to improve the quality of processing by eliminating the arbitrary self-rotation of the additional cutting cup. The cutter consists of a fixed body, which is connected by means of a transfer to an additional cutting cup. The gear ratio is calculated from the equation i (O, 2 .. OO, 5) n: g, where R is the radius of the main cutting cup; g is the radius of the additional cutting cup. In the process of cutting, the self-rotation of the additional cutting cup occurs in the opposite direction from the main cutting cup due to the connection with the fixed cutter body by means of transmission. 2 silt ,, 1 tabl „with s O)

Description

one

The invention relates to the processing of materials by cutting, namely to rotary cutting, and can be used in the processing of parts from various materials.

The aim of the invention is to improve the quality of processing by eliminating the arbitrary self-rotation of the additional cutting cup.

Fig about 1 shows a diagram of the proposed cutter; in fig. 2 is a view A of FIG. one.

The cutter consists of a stationary body 1, which is connected by means of gear 2 with an additional cutting plate 3 mounted on axis 4, and shaft 5 with a main cup cutting element 6 fixed on it,

In the process, the true speed | the cutting edge V of the cutting elements (main V and additional V cutting plates) of various sizes and directions, which allows for sustainable crushing of chips. The vector of the true speed of the additional cutting plate coincides in direction with the velocity vector of the main cutting cup and differs by the value determined by the value of the gear ratio i:

JV eo

X)

Yu

N)

Vj Oh, - R - i - coO;

Vo, .R;

V (0,2 .., 0,5)

, R- i- with.

g

- {0,2 „„. 0,5)

one

ten

about

"" "R;

(0, 5) R

  -. The specific orientation of the cutting cup relative to the treated. the part allows the cutting cup to rotate under the influence of the forces of friction of the tool against the surface to be machined and under the action of converging chips. In the process of cutting the blades, the additional cutting cup is in the opposite direction to the main cutting cup due to the connection with the fixed cutter body by means of gear. Due to the opposite self-rotation and the difference in speeds (Vg-Va), chips are crushed, while the quality of the treated surface remains high,

The table shows the results of comparative studies to determine the quality of the processed surface.

feed, mm / rev; t is the cutting depth, mm.

The output parameter Nd is the height of the irregularities of the treated surface, μm.

The table shows that when using the proposed cutter, the quality of processing in relation to the surface roughness increases and stable chip breaking is observed compared to the prototype. The height of the surface irregularities processed by the proposed cutter is 32% lower than the prototype.

Formula

invented

Rotary cutter on ant, of sv. No. 1279753, characterized in that, in order to increase the processing quality by eliminating the voluntary self-rotating of the additional cutting cup, the latter is associated

shavings and chip breakers are offered with a fixed body by means of

go cutter and cutter prototype

Processing conditions: the processed material is fiberglass; workpiece diameter 200 mm; workpiece length 420 mm; diameter of the main cutting element (c) 59 mm; diameter of the additional cutting tool (d) is 14.5 mm,

Processing mode: n - machine spindle speed, rpm; S - longitudinal

entered into the cutter transmission, the gear ratio i which is calculated by the ratio

(0,2..ooO, 5) H 30 1

where R is the radius of the main cutting

cups;

d is the radius of the additional slitting cup.

feed, mm / rev; t is the cutting depth, mm.

The output parameter Nd is the height of asperities of the machined surface, μm.

The table shows that when using the proposed cutter, the quality of processing in relation to the surface roughness increases and stable chip breaking is observed in comparison with the prototype. The height of the asperities of the surface treated with the proposed cutter, in comparison with the prototype below by 32%.

Formula

the invention

Rotary cutter on ant, of sv. No. 1279753, characterized in that, in order to improve the quality of processing by eliminating the arbitrary autorotation of the additional cutting cup, the latter is associated with

fixed case by

entered into the cutter gear, the gear ratio i which is calculated by the ratio

(0,2 .. oo, 5) H 1

where R is the radius of the main cutting

cups;

r is the radius of the additional cutting cup.

Reeets

1-0.1 -Tl-O.Z Ti-0.3 1 1-0.4 I 1-0.5

R,

1-0.6

1-0.7

ha

(000,280,13,5

2500,30,254,7

4000,340,54,0

5000,391,03,6

6300.43

8000.47

1000 0.47

1.5 3.0 2.0 3.2 2.5 3.0

1250 0.47 3.0 2.8

Prototype

0.25 0.5

16000.47

The average

JOO0.28 0.1

2500.3

4000.34

5000.39 1.0

6300.43 1.5

8000.47 2.0

10,000.47 2.5

12,500.47

16000.47

3.1

3.0 2.7 2.5 2.7 1.6 1.2 1.3 1.2 1.3

2, A 2.0 1.8 1.6 1.6 1.A 1.5

1.9 2.2 2.0 1.5 I, 1.2 1, A

1.6 1.8 1.3 ", 2 1.3

3.5 3.2 3.0 2.8 3.0 2.9

3.4

3.437 1.944 1.900 1.878 1.867 3.244 3.833 4.0 3.8 3.6 2.9 2.7 2.2 2.0 3.02.0

1.9 Average 2.789

/

2.8 2.0

2, A 2.0 1.8 1.6 1.6 1.A 1.5

2.7 2.6

1.9 2.2 2.0 1.5 I, 1.2 1, A

i, 63.5

2.43.7

2.23.6 2,

1.6 1.8 1.3 ", 2 1.3

3.5 3.2 3.0 2.8 3.0 2.9

4.0

4.0

3.9

4.2 3, 3.6 3.5

3.4

/

X / XXXX

(

viewA

sri.g

Claims (1)

Claim Rotary Cutter St. No. 1279753, characterized in that, in order to improve the quality of processing by eliminating the arbitrary self-rotation of the additional cutting cup, the latter is connected to the stationary body by means of a gear inserted into the cutter, the gear ratio i of which is calculated by the ratio. _ (0.2 ... 0.5) R where R is the radius of the main cutting cup; g is the radius of the additional cutting cup. Cutter π s t l 1-0.1 > °, ₂ 1-0.3 1 1-0.4 j 1-0.5 1 i-0.6 1 1-0 ,? Proposal em 100 0.28 0.1 3,5 3.0 2,8 2.7 2.6 3,5 4.0 250 0.3 0.25 4.7 2.7  2.0 2.6 2,4 3,7 4.0 400 0.34 0.5 4.0 , 2.5 2,4 1.9 ’ 2.2 3.6 4.1 500 0.39 1,0 3.6 2.7 2.0 2.2 2,4 3,5 3.9 630 0.43 1.5 3.0 1,6 1.8 2.0 1.6 3.2 4.2 800 0.47 2.0 3.2 1,2 X 1.6 1,5 1.8 • 3.0 3.8 1000 0.47 2,5 3.0 1.3 1.6 1.4 1.3  2,8 3.6 1250 0.47 3.0 2.8 1.2 1.4 1,2 ", 2 3.0 3,5 1600 0.47 3,1 1.3 1.5 1.4 1.3 2.9 3.4 Average 3, -437 1,944 1,900 1,878 1,867 3,244 3,833 Prototype 100 0.28 0.1 4.0 250 oz 0.25 3.8 400 0.34 0.5 3.6 500 0.39 1,0 2.9 630 0.43 1,5 2.7 800 0.47 2.0 2.2 1000 0.47 2,5 2.0 1250 0.47 3.0 2.0 1600 0.47 1.9 Average 2,789 ί Ζ ⁵ ////// Y ζΖ / ΖΖ < / 77777/777777 U of FIG. 1