SU1093467A1 - Multiple-seat fixture - Google Patents

Abstract

A MULTI-PLACE CLAMPING DEVICE, comprising a housing, a base bar with sockets, a movable carriage with pressure rollers mounted on an axis, and a lever system with an actuator, characterized in that, in order to improve machining accuracy, each socket is made in the form of a rectangular trapezium and each The pressure roller is mounted on an axis with a gap and is designed to interact with the inclined surface of the socket.

Description

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4 Od The invention relates to the processing of materials by cutting, namely to multi-seat devices for securing cylindrical parts on machine tools. A grime clamping device is known, comprising a housing, a base bar with sockets and a lever system with clamping elements I. The disadvantage of this device is that the machining accuracy is low, due to the fact that the parts are based when fastened along the inclined slots of the sockets. The closest technical solution to the proposed is a multi-clamping device comprising a housing, a base bar with sockets, a movable carriage with pressure rollers mounted on an axis, and a lever system with a drive 2. The disadvantage of the known device is the low machining accuracy due to insufficient rigidity fixing and precision-based parts. The aim of the invention is to improve the machining accuracy by increasing the fixing rigidity and accuracy of the base of the parts. This goal is achieved by the fact that in a local clamping device comprising a housing, a base bar with sockets, a movable carriage with pressure rollers mounted on an axis, and a lever system with an actuator, each socket is made in the form of a rectangular trapezium and each pressure roller is installed on an axis with a gap and intended to interact with the sloping surface of the socket. Such an embodiment of the device provides a more accurate basing of the part, since for this purpose the rectangular base surface of the socket is used and the rigidity of fixing the part increases, since its elastic deformation under the action of clamping forces is not affected by the deformation of other parts, which improves the accuracy of machining of parts. FIG. 1 shows a multi-clamping device, top view; in fig. 2 is a section A-A in FIG. one; in fig. 3 shows the node I in FIG. 1 (relative position of the roller and the part in the slot of the device). The device comprises a housing I, guiding columns 2 on which a movable carriage 3 is mounted with movement, with holes in which the plungers 4 are mounted. In the carriage 3 there is also a groove B in which two shoulders levers 5-7 are placed. The lever 5 is connected with the carriage 3 by the axis 8. A wedge 9, a plunger 10 and a lever P are used to move the carriage 3 from the pneumatic cylinder (not shown). In the groove of the plunger 4 there is a pressure roller 12 mounted with the possibility of free rotation with a radial clearance on the axis 13 The sockets of the base plate 14 for moving parts 15 in them have three working surfaces, two of which are intended to interact with the part 15 along the surfaces (a, b), the angle between which is straight, and the third (c) to interact with pinch roller 12. Straight angle "between the surface E (a, b) is required to accurately basing members 15 about a common axis 15 at the nip parts. The plane (c) is inclined to create a wedge clamp of the part 15 with the condition that the clamping force is directed through the right angle and the point of intersection of the planes (a, b.). This plane interacts with the roller 12 and is not in contact with the part 15. The device operates as follows. in a way. A detail 15 is installed in each slot of the base plate 14. The force developed by the pneumatic cylinder is transmitted to the wedge 9, the plunger 10 and through the lever 11 of the movable carriage 3. The latter, together with the plungers 10 and the levers AND, move along the guides 2. When one of the plungers 4 touches By part 15, the plunger 4 stops, and the carriage 3 continues to move, and through levers 5-7 the force is transmitted to the other plungers 4. As the rollers 12 are mounted on an axis with a radial clearance when clamping, they slide along an inclined plane into the slots of the base plate 1 4, and also along the plane r of the cuts in the plungers 4, preventing the vertical rotation of the axis of the roller 12, secured the part 15. Thus, each part 15 is rigidly and precisely secured, since it is pressed by the roller 12 in the Two supporting planes simultaneously. To expand the parts 15, the movement of the pneumatic cylinder is reversed, the wedge 9 and the plunger 10 move in the opposite direction. The part 15 is released, the carriage 3 together with the plunger-lever system returns to its original position. Due to such an implementation of the device, the processing accuracy is increased by increasing the rigidity of fixing the parts and the accuracy of their base.

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Claims (1)

A MULTI-SIZED CLAMPING DEVICE comprising a housing, a base plate with sockets, a movable carriage with pressure rollers mounted on an axis, and a lever system with a drive, characterized in that, in order to increase the accuracy of processing, each socket is made in the form of a rectangular trapezoid, and each clamp the roller is mounted on the axis with a gap and is designed to interact with the inclined surface of the socket. Figure 1