Repositioning connection device of positioning for flexibility and fastening for rigidity

Abstract

The invention relates to a connecting device for flexible positioning, rigid clamping and repeated positioning, which belongs to the technical field of the positioning and clamping between a machine tool and work pieces in the precision machinery manufacturing. The device consists of a chuck, a work piece supporting plate and drawn nails; the chuck is provided with four positioning teeth arrayed on the circumference of the top surface of the chuck evenly along the vertical direction; four Z directional stopping surfaces are arranged between the adjacent positioning teeth along the vertical direction; the work piece supporting plate is provided with a lug boss, through grooves and blind grooves; four through grooves are arrayed on the circumference of the top surface of the work piece supporting plate evenly along the vertical direction to divide the lug boss into four parts; the blind grooves are arranged at two sides of each through groove, and thin walls are arranged between the through grooves and the blind grooves; when in use, the four positioning teeth and the four through grooves are spliced together, and the four top surfaces of the lug boss are clung to the four Z directional stopping surfaces; the walls of the bind grooves can be deformed flexibly to lead the work pieces fixed on the work piece support plate to obtain the flexible positioning and the rigid clamping of the X direction, the Y direction and the Z direction. The connecting device for the flexible positioning, the rigid clamping and the repeated positioning has the advantages of high positioning precision, good repeated positioning, little contact surface wearing and strong tolerance capacity of the heavy cutting force.

Description

technical field [0001] The invention relates to a flexible positioning rigid clamping repeated positioning connection device, which belongs to the technical field of positioning and clamping between machine tools and workpieces in precision machinery manufacturing. Background technique [0002] The connection device is most commonly used to clamp a connection with one or more workpieces. The workpiece is located at a precise position in the machining area of ​​the machine tool. The connection with the workpiece is the carrier or pallet of the workpiece. Chuck. [0003] Chinese patent CN1443620A discloses a connecting device. The device includes a chuck and a detachable workpiece holder clamp connected to the chuck. The workpiece holder with the clamping pin is fixed in the fixture of the chuck, the chuck is provided with a central hole and a clamping mechanism, the former is used to accommodate the clamping pin, and the latter firmly holds the clamping pin in the central h...

AI Technical Summary

Problems solved by technology

The problem with this connecting device is that it can only be positioned in one direction in the X or Y directions. If simultaneous positioning in the X and Y directions is required, two or more connecting devices must be combined and used together, and the combined device High installation requirements

Therefore, when the workpiece pallet is connected with the chuck for positioning, the center pin on the chuck only contacts with a single side of the corresponding groove, and there is a gap between the center pin and the other side, so only one of the eight sides of the four grooves Four fit, this kind of positioning belongs to rigid positioning, which will lead to uncertain positioning

In addition, the friction between the center pin and the side of the groove that fits it is extremely high, which will cause uneven wear of the center pin and the side of the groove during use, and ultimately affect the accuracy of positioning, making the device unsuitable for precise repetition. Positioning means

[0005] In summary, the disadvantage of the existing connection device is that its rigid support is realized on the flexible extrusion deformation of one of the chuck and the workpiece support plate, and under the action of heavy cutting force, the flexible extrusion deformation will produce vibration and trembling , so that the machining accuracy of the workpiece on the workpiece pallet is out of control

Images