SU1328080A1 - Chuck - Google Patents

Abstract

The invention relates to devices for securing blanks and tools on a machine spindle. The aim of the invention is to improve the reliability of the clamp. The clamping element in the form of a collet is located in the machine spindle. The cuts of the workpiece or tool are eccentric, spring-loaded in the angular position with torsion rods, located in the slots of the clamping element at an angle, not exceeding 45. It is possible to arrange eccentrics in several rows and different combinations of reversal of eccentrics, for example, the reversal of neighboring eccentrics in each row and between rows is opposed to each other. With the clamping element open, the eccentrics are pressed against the clamping object by rotation, and when the jaws of the clamping element are flattened, the part or tool is securely fixed. The location of all eccentrics at an angle to the axis of rotation of the cartridge increases the reliability of the clamp, since in this case, they perceive axial loads. 1 hp 9 il. § SL

Description

5, and more specifically to devices for securing parts and tools in the machine spindle.

The aim of the invention is to improve the reliability of the clamp.

Fig, 1 shows the cartridge, axial section; FIG. 2 is a section A-A in FIG. on fig.Z - section bb nafir; 1; 1o-sharpening the workpiece.

FIG. 4 is a view B of FIG. 3; in FIG. 5, the cartridge works as follows; section G-D in FIG. 3; 6–9 - Before starting the clamping, when the clamps of the eccentrics in the sponge of the clamping chuck 2 .. The eccentrics located parallel to the axis of the cartridge perceive radial loads, and the eccentrics arranged at an angle not exceeding 45 ° perceive the axial loads and prevent rolling combinations of eccentric positioning in the cartridge.

The chuck consists of a clamping element 2 located in the spindle 1 (Fig. 1) in the form of a clamping collet, in the slot x 3 of which there are wedging elements made in the form of eccentrics 4 and 5 mounted on axles b and 7 and rigidly zanichnymi with them using the keys 8 and 9. Axes 6 and 7 are set at an angle to the axis of the cartridge, not exceeding 45 °. Axes 6 and 7 are stepped. On the steps of the axles 6 and. 7 (FIGS. 2-4), the pins 10 and 11J are fixed with respect to the stop 12 (FIG. 4) rigidly connected with the screw 13 with the clamping element 2, the angular positioning of the eccentrics 4 and 5 in the absence of the workpiece 14. On the steps of the axes 6 and 7 (Figures 2 and 3) placed eccentrics 4 and

which are held stationary in the axial direction by vtu gcs 15 and 16 and by flanges of axes 6 and 7, axes 6 and 7 have holes in which the ends of torsion springs 17 and 18 are installed (figs 2, 3 and 5), the other ends of springs are rigidly connected a nut 19 with a clamping element 2. The clamping element 2 is connected with a drive with the help of a pipe 20 of the clamp 20.

For the purpose of clamping stiffness, an additional row of eccentrics 21 is provided in the cartridge, rigidly mounted on the axles 22 by means of keys 23 and located in the housing (spindle 1). Additional eccentrics increase the clamp base. The blade is 24, one end of which is connected to the axis 22 of the eccentric 21, and the other is fixed by the pin 25 in the spindle 1 returns the eccentric 21 to its original position. Since the eccentrics 21 are not connected to the movable clamping element 2, when clamping the workpiece 14, it is prevented from being thrown off due to jamming, which ensures a high axial accuracy of the clamping. Fig 6-9

-chipping the workpiece.

The eccentrics in the sponge of the chuck 2 are eccentric. The eccentrics located parallel to the axis of the cartridge perceive radial loads, and eccentrics located at an angle, not exceeding 45 ° perceive axial loads and prevent from rolling

Noah element 2 is opened, the eccentrics 4 and 5 under the action of the springs 17 and 18 are deployed so that they choose gaps, pressing against the workpiece 14, When the workpiece 14 is shifted (fed) to the right (figure 1), the eccentrics 4 and 5 are affected by forces coupling with a pulping 14 and eccentrics 4 and 5 make low amplitude angular oscillations, skipping the workpiece 14,

When the pipe 20 is moved to the left, the clamping element 2 is tightened by a small amount required for radial displacement due to the contact 1and the jaws of the clamping element 2 with the cone of spindle 1 and eccentric, 4 and 5 with the workpiece 14, Dopolitel1 ;. eccentrics 21 exclude from / gkvania rod due to jamming,

The technical and economic efficiency of the clamping chuck is due to the odds, the processing accuracy is 1.2–1.5 times; at the expense of increasing the clamping reliability and processing performance by a factor of 1.8–2 times due to the reduction of the auxiliary time required to replace the cartridges.

Claims (1)

This type of chuck can be used in CNC lathes operating in the FMS. Invention Formula A clamping cartridge, in the grooves of which} the kimny elements of which are rotatably mounted on the axes, are wedged eccentrics connected to the clamping elements by means of torsion springs, differing so that, in order to increase the reliability of zansima. eccentric axes are mounted at an angle to the axis of the cartridge not exceeding 45 °. 2, the cartridge according to claim 1, about t .l and h ayuSch and the fact that the eccentrics are installed in several rows, and the eccentrics adjacent in each row and between the rows are located opposite to each other. w 3 4 ts 70S s Bidv 3 12 (puzA For cinnamon alepent Eccentric Fig 6 rka.e Compiled by A.Gavryushin Editor G.Gerber Tehred V.Kadar Proofreader V.But ha Order 3431/14 Circulation 974 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 FIG. five futl % g. 9