SU1364407A2 - Collet chuck - Google Patents

Abstract

The invention relates to the field of metalworking and can be used on turning robot-technological complexes in flexible industrial complexes. The aim of the invention is to improve the reliability of the cartridge. An air supply holder B is fixed on the front headstock of the machine, on which with the help of an annular shaping mandrel 12

Description

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Installed elastic cuff 13 U-shaped section. Petals 14 and 15 of the cuff 13 enter with a gap in the annular groove 9 of the body 1 of the cartridge. The radial clearances between the petals of the cuff and the hundreds of grooves in the body of the cartridge are 0.3-0.6 mm. The ring forming mandrel 12 has a lattice structure that provides access of compressed air to the petals of the cuff. When you turn on the supply of compressed air in the air supply housing, the compressed air enters the cavity between the petals 14 and 15 of the cuff and the bottom of the groove of the cartridge case. As a result of the increase in pressure in this cavity, the petals 14 and 15 are pressed against the walls of the groove in the body of the cartridge and seal the connection between the air supply sleeve and the body of the cartridge. After that, compressed air through the holes in the body of the cartridge enters the cavity of the pneumatic actuators of the cartridge. 6 Il.

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The invention relates to metalworking, can be used on turning robot-technological complexes in flexible automated productions, and is an improvement of the collet chuck according to ed. St. No. 1184614.

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

FIG. 1 shows a collet chuck; in fig. 2 — node I in FIG. one; in fig. 3 shows a section A-A in FIG. Fig. 4 shows an annular shape-forming mandrel; in fig. 5 is a view B in FIG. four; in fig. 6 - collet chuck after turning on the supply of compressed air, section along the axis.

Collet chuck contains mounted on the spindle of the machine body 1 with cylinder 2 fixed on it, in which there are pistons 3-5 pneumatic actuators of the mechanisms for clamping collet 6 for gripping and adding bar 7. On the outer wall of the body 1 of the cartridge.

 facing the air supply sleeve 8, there is an annular groove 9 which is connected by openings 10 to a cavity of 11 pneumatic drives of the cartridge

The air feed sleeve 8 comprises an annular shaping mandrel 12 on which an elastic cuff 13 of U-shaped section is fixed. Petals 14 and 15 of the elastic cuff 13 are inserted into the groove 9 of the body 1 of the cartridge with gaps.

The elastic cuff 13 is mounted on an annular shaping mandrel 12 with little tension, thereby ensuring the stability of the cuff shape and the uniformity of the radial gaps in the range of 0.3-0.6 mm.

The ring forming mandrel 12 has a lattice design, whereby compressed air is freely accessible to the petals 14 and 15 of the cuff.

At the base of the cuff 13, holes 16 are made for the passage of compressed air and fastening screws, which are aligned with the similar openings of the ring forming mandrel 12.

When the supply of compressed air to the air supply holder 8 (Fig. 6) is turned on, the compressed air passes through the holes 16 at the base of the cuff 13 and the forming forming mandrel into the space between the petals 14 and 15 of the cuff. As a result, the pressure in the space between the petals increases, and at the edges of the petals when compressed air flows through the narrowing of the radial clearances S according to the Bernoulli equation, a pressure difference arises and a force bending the petals 14 and 15 of the cuff to the walls of the groove 9 in the cartridge case and increasing with decreasing the expiration of compressed air pressure in the space between the petals presses the petals of the cuff against the groove walls in the body of the cartridge. At the same time, the compressed air passes through the holes 10 in the cartridge case into the cavity i1 of the pneumatic actuators of the cartridge.

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When the compressed air supply is shut off, the control pneumatic control valve connects the channel of the air casing 8 with the atmosphere. As a result, compressed air expires from the cavity of 11 pneumatic drives of the cartridge and pistons 3-5 under. the action of the springs comes to its original position (Fig. 1). As the compressed air outflows from the cavity of the pneumatic drives of the cartridge, the pressure drops in the space between the petals 14 and 15 of the cuff. Due to this, the petals of the cuff move away from the walls of the groove 9 in the body of the cartridge. And they are adjacent to the ring forming mandrel 12, restoring the original shape of the cuff 13 and the uniformity of the radial clearances S between the petals of the cuff and the walls of the groove.

The lattice design of the annular shape-forming mandrel 12 provides free passage of compressed air to the petals 14 and 15 of the cuff.

The holes 16 in the base of the cuff and the annular mandrel are not intended to create pneumatic resistance, therefore their cross-sectional area ensures free passage of air ckaToro without

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reduce its speed in the cavity of 11 pneumatic chuck.

Thus, the speed of operation of the cartridge is ensured.

Limb petals panzhety on. 0.3-0.6 mm does not create significant loads in the cuff material. The ring forming mandrel ensures the preservation of the shape of the cuff and the uniformity of the radial gaps between the le -. pestles cuffs and grooves of the body of the cartridge. Condensation of water, oil and dirt does not accumulate in the air supply housing.

This ensures the stability and reliability of the cartridge for a long time.

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Claims (1)

Invention Formula Collet Chuck Auth. St. No. 1184614, characterized in that, in order to increase the reliability of the cartridge, it is provided with an annular, made in the form of a grill, located on the air casing, a mandrel with an elastic cuff of U-shaped section fixed on it, installed with a clearance in the groove made in the body. v FIG. g to FIG. J 7J shishiipi d d shishashshl Fig View b FIG. five (3 at FIG. 6