SU1673301A1 - Gripping chuck - Google Patents

Abstract

The invention relates to a machine tool industry, and more particularly to devices for securing machine tool spindles. The aim of the invention is to expand the technological capabilities by expanding the range of parameters of the clamped parts. The cams 2 are located in the housing 1. The movement of each cam is driven by a telescopic cylinder, the fixed part 4 of which is fixed in the housing 1, and working surfaces 3 are made on the moving parts 5 and 6. When the working medium in the cavity A is metered, the parts 5 move and 6 to the center, moreover, if the diameter of the workpiece 11 is minimal, then the working surface 3 is also small, and if the diameter of the workpiece is maximum, then the working surface of the clamp increases by supplying the surface 3 to the parts 5. The clamping is performed When applying the working medium in the cavity B and C 7 yl.

Description

The invention relates to a machine tool industry, and more specifically to devices for securing blanks on a machine spindle. The purpose of the invention is the expansion of technological capabilities by expanding the range of diameters.

FIG. 1 shows a working face with a partial cut in the clamping position of the minimum diameter of the workpiece; FIG. 2 - the same, in the clamping position of the maximum diameter of the workpiece; in fig. 3 is a scheme for securing a workpiece of maximum diameter; in fig. 4 is the same for a billet of intermediate diameter; Fig, 5 is the same for the minimum diameter of the workpiece; in fig. 6 is a scheme for securing blanks of various sections with a centralized supply of working medium; in fig. 7 is a scheme for securing blanks of various sections with an individual supply of working medium. The clamping chuck includes a housing 1, in grooves of which clamping cams 2 with working surfaces 3 are placed. Each cam is driven in the form of a telescopic actuator cylinder containing a stationary part 4 and a movable part 5 and 6. The working surfaces 3 are made on the ends of the movable parts, and the fixed part 4 is fixed in the housing 1. The cavities A, B and C are connected through metering devices 7 to the filling medium 8 of the fluid 9. Seals 10 are installed in the cams to eliminate leaks of the moving medium 9 (Fig 1.2) It is as follows.

The workpiece 11 is installed in the clamping jaws 2, centered by parts 5 or 6 by introducing into the cavity A the mobile medium 9 from the filler 8 through the dispenser 7 (strictly dosed portions), the doses of the mobile medium 9 are determined by the dispensers 7 receiving command from the CNC machine ( not shown) depending on the shape and size of the fixed blanks 11, when the fluid is supplied in cavity A, a radial movement takes place to the center of the cartridge parts 5 and 6, which with their working surfaces 3 center the blank 1 1 (Fig. 1-7 ), and fixing atoms tovok 11 produced on the movable floor impact medium 9, for example using a fluid ferrofluid - electromagnetic field, industrial oils - the pressure field of bulk materials - vacuum rasppa- Islands - temperature field, etc.

When clamping a larger diameter (size) of the cross section of the workpiece 11, a larger number of working surfaces of 3 parts 5 and 6 is involved in

increases the clamping base of the part, stiffness, accuracy (Fig. 2). When clamping a smaller clamping diameter, a smaller number of working surfaces 3 (Fig. 1) are involved in the clamp. Thus, depending on the diameter (size) of the cross section of the workpiece, the size of the clamp base, the nature of the area of contact of the part with the working surfaces vary.

0 cams. Thus, with an increase in the diameter of the workpiece, the clamping base and contact area increases and vice versa, this leads to stabilization of rigidity and accuracy of fixing the workpieces 11, as well as to the possibility

5 securing blanks 11 complex profile

in cross section and their off-center

fixing when applying different volumes

the mobile environment 9 in the cavity And the Cams 2.

The unclamping of part 11 is performed by removing the force field, connecting the cavities A with the filler 8, discharging the fluid and feeding the fluid 9 into cavities B and B, as a result of which parts 5 and 6 move radially from the axis of the cartridge and produce

5 expanding part 11

Clamping and unclamping when servicing several devices remotely (FIGS. 6, 7) is similar. The volume of the dosed portions depends

0 on the amount of mobile medium supplied from the storage tank, and is related by dependency and

,

5 where Lysum is the change in the volume of the storage reservoir;

Fi | i is the cross-sectional area of the clamping elements of the jth fixture, Ldij is the linear movement of the 1st clamping element in the direction of the surface to be fixed in the jth fixture, and the fixing of the part is done by influencing the field, for example magnetic on the moving medium.

Claims (1)

5 Formula of Invention A clamping chuck, in the radial grooves of which are placed clamping cams with working surfaces, each of which is associated with a power cylinder drive, characterized in that, in order to expand technological capabilities by increasing the diameter range of the parts to be fixed, each power cylinder the cam drive is made telescopic, containing non-swirling and moving parts, and the working surfaces are made at the ends of the moving parts, with the fixed part located in the body of the cartridge $ gpf 6 01 1 mf ioeez.9i // 7 eight