CS257354B1 - Tie clamp for automated workstation - Google Patents

Abstract

The solution relates to a collet chuck for an automated workplace intended for automatic collet change. The essence of the solution lies in the fact that on the periphery of the collet chuck body there is an axially displaceable locking ring connected to the slide by at least one driving pin and at least two segments are radially displaceable in the collet chuck body, which are adapted from the peripheral side for engagement with the locking ring, whereby the locking ring together with the segments forms a securing device of the collet chuck.

Description

257354

BACKGROUND OF THE INVENTION The present invention relates to a clamp clamp for automated workstations intended for clamping a bar stock by means of a pliers ČSN 24 21 40 with the possibility of] automated exchange. Currently, clamping clamps are commonly used with lathe clamps in turning machines, but this exchange is done manually and laborious latch is held in the clamp body usually by a lid that is screwed or threaded to the body bolted directly to the body. The change of the Kiese language requires the disassembly of the lid and then the assembly, which causes the long switching times in the individual exchanges, seems to be disadvantageous especially in the case of small-lot production. In addition, it is difficult to automate the replacement of the keys, although the requirement for automation is becoming increasingly topical in today's science and technology revolution and automated manufacturing systems.

These disadvantages are alleviated by the collet clamp according to the invention, which consists in the fact that, at the periphery of the collet body, there is an axially displaceable locking ring coupled to the slide by at least one entrainment pin and radially slidably mounted in the collet clamp body at least two segments which are adapted from the circumferential side of the locking ring to the locking ring, wherein the locking ring, together with the segment, forms the locking device of the clamping ring.

The clamp clamp according to the invention is shown in the accompanying drawings, wherein FIG. 1 shows its longitudinal section, and FIG. 2 shows the cross section of the clamp clamp in the housing of the segments in the body.

A clamp clamp body 201 is clamped onto the machine tool spindle 110 by clamping bolts 120. The slide 201 is axially displaceable in the body 201, which is in a known manner switched by a known operating device. A locking ring 210 is axially displaceable on the housing body 201 and is fixedly coupled to the slide 202 by means of a drive pin 20B displaceable axially in the groove 212 of the housing 201.

At least two segments 215 are disposed radially in the body 201, which have a guide groove 216 for the guide pin 207 being pressed into the body 201. From the circumferential side, the contact surfaces 214 are adapted for coaxial engagement with the chamfered surface 213 of the locking ring 210 and have an abutment support. the surface 218 for securing the collar 203 in the axial direction. The guiding of the segments 223 is formed from one side of the collet clamp body 201 and the other side by the flange 209 attached to the body 201 by the screws 208. The opening 224 of the flange 209 is such as to allow insertion and removal of the collet 203 from the cavity 219, in which a known stop ring 204 is disposed at an axial distance from the collet clamp 200, the position of which is secured to the body 201 by means of a locking pin 205. The spring 204 is arranged between the ring 204 and the inserted collet 203. in the locked position of the collet 203, and after unlocking the collar 203, it is pulled out of the cavity 219 at least so as to be accessible for grasping, for example, by the fingers of the manipulator.

The locking of the collet 203 in the collet switch 200 takes place as follows: The slide 202 is in the rear position, the locking ring 210 not in contact with the sosegments 215, which at least one elastic element 211 disposed in the direction of the periphery of the body 201a and their contact surface 214 protrudes above Through the opening 224 of the flange 209a between the segments 215, the tine 203 is inserted into the cavity 219 while the spring 221 of the extension device 222 is pressed in. In this state, the slide 202 performs a part of the forward stroke while the locking ring is also moved 210, it will engage with the tapered surface 213 with the tread surfaces 214 of the segments 215 and slide them toward the center. The segments 215 thus come into contact with their abutment 218 of the collet 203 and thereby the tongs 203 in the collet clamp 200 are secured against the axial extension. The remainder of the plunger 202 is already the working stroke required to clamp the blank in the collet 203 in a known manner.

The release of the collet 203 from the clamp 200 is performed such that the slide 202 is moved to the rear position, thereby engaging the locking ring 210 from the engagement with the segments 215, which, on the one hand, acts on the periphery of the spring element 221 and on the circumference and the collar 203 is retracted from the cavity 219 so as to protrude from the collet clamp face 200, thereby allowing it to be gripped by, for example, a handler.

This method of securing and releasing the tine 203 allows it to be changed automatically, whereby the clamp clamp 200 of the invention is particularly suited to automated manufacturing systems.

Claims (3)

A collet chuck for an automated workstation comprising a chuck body in which a force clamping mechanism and a removable collet are provided, characterized in that an axially slidably arranged locking ring (210) coupled to the slide (20) is arranged on the periphery of the chuck (200). 202), at least one carrier pin (206) and at least two segments (215) radially displaceably mounted in the body (201) of the collet chuck (200), which are circumferentially adapted for co-engagement with the locking ring of the invention (210) (220) a collet chuck (200). A collet chuck according to claim 1, characterized in that at least one spring element (211) is arranged between the segments (215). A collet chuck according to claim 1 or 2, characterized in that a spring (221 j) is arranged between the collet (203) and the stop ring (204), which together with the ring (204) forms an extension device (222) of the collet (203). .