SU1252073A1 - Chip-breaking device - Google Patents

Description

The invention relates to metal cutting and can be used in metal cutting machines for crushing chips.

The purpose of the invention is to simplify the design by allowing chips to be crushed during multi-spindle processing with a small center distance between the spindles.

FIG. 1 shows a device, an axial section; in fig. 2 is a view A of FIG. one; in fig. 3 is a diagram of cutting a branch of a chip; in fig. 4 - device with the angle of inclination of the wall of the chip breaking slot less than the angle of inclination of the spiral of the drill, general view; in FIG. 5 the same, with the angle of inclination of the wall of the chip-breaking groove equal to or greater than the angle of inclination of the spiral of the drill.

The chip crushing device comprises a conductor plate 1 and a conductor sleeve 2 located therein, which is provided with a shoulder protruding above the surface of the plate 1. Notch 3 with inclined side walls is made in the flange of the sleeve 2. the inclination of the drill spiral 5. The angle / inclination of the other wall of the recess 3 determines the width of the recess, which depends on the diameter of the turn of the chip. Angle / in the proposed device is equal to 30. The angle at the inclination of the edge of the wall 4 of the notch depends on the material of the workpiece 6 and is 0-20 °. The depth h of the recess is equal to or slightly larger than the diameter of the turn of the chip 7. The edge of the wall 4 and the gage edge of the drill 5 form two intersecting planes such as scissors.

The angle oi is chosen equal to or greater by 1-5 ° of the angle of inclination of the spiral of the drill 5 (Fig. 5), so that the coil of the chip 7 is captured and its subsequent cutting is done by per 52073

shear type scissor planes,

forming wall 4 and calibrating edge drill 5.

If the angle c is smaller than the angle t-J on the helix of the drill (Fig. 4), then it is possible to push a coil of chip from the notch 3 by the plane of the helix of the drill with the force F,. An increase in the angle ci by more than 5 ° is non-cicatricial, since an axial force F appears that pushes the sleeve out of the socket, and moreover, the strength of the visor formed by the wall 4 and the end of the sleeve 2 decreases.

) 5 The optimum angle of inclination of the surface of the recess 3 is calculated by the formula

H tgft;

20T1 and 5

where D is the outer diameter of the shoulder

bushings;

H - the height of the collar sleeve. With such a value of the angle, the best turn of the chip into the recess of the sleeve occurs.

The angle y depends on the material being processed and is selected from the tables as the cutting edge angle.

30 The device operates as follows.

The device for crushing chips is made on the pedestal jigs of multi-spindle nozzles with automatic change of nozzles. When welding part 6 chips, the output from the conductor sleeve 2, under the action of centrifugal force, tends to deviate in the radial direction from

40, the axis of rotation and successively falls into the recess 3 of the collar of the sleeve. During the rotation of the drill 5, its calibrating edge and the cutting edge of the wall 4 of the notch form two intersecting

45 plane type scissors, due to what is cutting, crushing chips.

25

2

FIG.

Compiled by M.Chernykh. Editor N. Bobkova Tehred N. Bonkalo Proofreader T. Kolb

Order 4568/14 Circulation 1001 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

A device for crushing chips, comprising a housing with a shoulder and with a chip breaking groove, one wall of which is made inclined and the other straight, characterized in that, in order to simplify the design by providing the possibility of crushing chips during multi-spindle machining with a small center distance between the spindles, the chipbreaking groove is made on the shoulder, while the straight wall of the groove is made oblique, the angle of inclination of which is chosen from the condition where d is the angle of inclination of the groove wall, - the angle of inclination of the spiral drill. Figure 1 SU „1252073