RU1816549C - Universal collet chuck - Google Patents

Abstract

Usage: in metalworking for securing parts. SUMMARY OF THE INVENTION: Two collets are mounted in a cartridge case 3: a collet 1 for clamping a part in an outer diameter and a collet 2 for clamping a part in an inner diameter. Each collet is connected to its drive and the collets move respectively on the inner and outer surfaces of the shank of the cartridge 3. The cartridge allows the workpiece to be machined both on the inner surface and on the outside without re-securing it in another cartridge. 4 ill.

Description

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FIELD OF THE INVENTION This invention relates to clamping devices of machine tools, and in particular to collet chucks.

The invention can be implemented in the machining industry when processing blanks in flocks.

The aim of the invention is to increase the productivity of processing workpieces on machines.

In FIG. 1 depicts two positions of a universal collet chuck (the upper half of Fig. 1 illustrates the clamping of a workpiece on an inner surface, the lower half of Fig. 1 illustrates a clamping of a workpiece on an outer surface); figure 2 - clamp the workpiece on the inner and outer surfaces m; in Fig.3 - section aa in Fig.2; figure 4 is a view of B in figure 2.

The universal collet chuck contains a collet 1 for clamping the part along the outer diameter, a collet 2 for clamping the part on the inner diameter, which move along the outer and inner surfaces of the shank of the chuck 2. The washer 4, which is attached to the link 7 with a key fifteen; moves along the keyway on the outer surface of the shank of the cartridge 3. On the outer and inner surfaces of the shank of the cartridge 3 there are stops 5 (3 pieces) and 10 (3 pieces). The washer 9, which is attached to the link 12 using the key 16, moves along the keyway on the inner surface of the shank of the cartridge 3. On the collets 1, 2. there are stops 13 (4 pieces), 14 (4 pieces), respectively. The universal collet chuck also contains springs 6 and 11. In all figures, the collet chuck is depicted with a workpiece 8.

Universal collet chuck works as follows. In the initial position, both the collet 1 and the collet 2 are pushed into the shank of the cartridge 3 (FIG. 1 upper and lower half). A signal is given to turn on the drive of the power mechanism), the drive of the power mechanism is not shown in the drawing, but the arrow shows the direction of action of the power mechanism clamp, expand), the power mechanism on the washer 4 moves the collet to clamp the part along the outer diameter of the outer surface of the shank of the cartridge 3 until it stops 5 (3 pieces), which are located on the outer surface of the shank of the cartridge 3. On the collet 1 there are grooves into which the stops 5 (3 pieces) pass between the petals of the collet 1 (Fig. 4). The stops 5 (3 pieces) do not allow further movement of the collet 1 along the outer surface of the shank of the cartridge 3. The power mechanism, continuing its action, compresses

the spring b is moved by the rod 7 along the collet 1, clamping the workpiece 8 along the outer surface (Fig. 1 lower half). The technological operation begins on processing the inner, right end and other surfaces of the workpiece 8. After the technological operation is completed, another signal is sent to turn on the drive of the power mechanism, which, acting on the washer 9, moves the collet 2 to clamp the part along the inner diameter along the inner surface of the shank of the cartridge 3 for stops 10 (3 pieces), which are located on the inner surface of the shank of the cartridge 3. On the collet 2 there are grooves into which the stops 10 (3 pieces) fall, the passage between the petals of the collet 2 (fi .4). The stops 10 (3 pieces) do not allow further movement of the collet 2 along the inner surface of the shank of the cartridge 3. The power mechanism, continuing to press the spring 11, moves the rod 12 along the collet 2, clamping the workpiece 8 on the inner surface (figure 1, the upper half ) The blank 8 is clamped with a collet chuck both on the outer and inner surfaces (Fig. 2).

Then, a signal is sent to turn off the drive of the power mechanism, which acted on the washer 4. A compressed unclenched spring 6 moves the rod 7 in the opposite direction to the stops 13 (4 pieces which are located on the collet 1, nut 7 there are grooves into which the stops 13 (4 pieces) when it is reversed (Fig. 3). The workpiece 8 is released from fastening on the outer surface. A collet 1 is inserted into the shank of the cartridge 3 to clamp the part on the outer diameter (upper half of Fig. 1). The process of processing the outer left end and other surfaces of the workpiece 8. After the complete processing of the workpieces 8, a signal is sent to turn off the drive of the power mechanism, which acted on the washer 9. A compressed spring 11, expanding, moves the rod 12 in the opposite direction to the stops 14 (4 pieces) located on the collet 2. On link 12 there are slots into which the stops 14 (4 pieces) fall during its reverse stroke (Fig. 3).

The workpiece 8 is released from fastening. Collet 2 is inserted into. shank of cartridge 3 (FIG. 1, lower half).

The universal collet chuck is ready to process the next workpiece.

The dowels 15, 16 on the washers 4, 9, as well as the grooves on the collets 1, 2 and on the arms 7, 12, prevent the rotation of the elements of the collet chuck relative to the shank of the chuck 3.

Claims (1)

SUMMARY OF THE INVENTION A universal collet chuck comprising a housing, a sleeve for cooperating with a collet for clamping a part in an outer diameter, a rod for interacting with a collet for clamping a part in an inner diameter, and a collet movement drive, characterized in that To increase productivity, the cartridge is equipped with an additional displacement drive designed to interact with one of the collets, the collet for clamping the workpiece on the outer diameter mounted on the outer surface of the housing, and the collet for clamping the workpiece on the inner diameter located on the inner surface of the housing.