SU511152A1 - Mandrel for processing thin-walled parts - Google Patents

Description

one

The invention relates to mechanical engineering.

Mandrels for machining thin-walled parts are known, containing the rotary axis of the central inlet film that are moved apart in the radial direction by means of t h hingedly connected to the ends of the slats and with the limited moving elements mounted on the screw.

The described mandrel differs from those known in that each end of the strap is pivotally attached by a lever, and at the ends of the screw are located movable axially relative to each other pads with hinges under the levers, and the limitedly movable elements are made of a stop nut and freely movable along the screw of the sleeve and are connected by elastic elements. In addition, at one of the ends of the screw there is a flange, which bears on itself a radially movable tack.

Such a design allows the simultaneous and independent opening of different ends of the slats to different diameters.

The drawing shows the proposed mandrel in section.

Claims (2)

The central screw 1 is loosely fitted with sleeves 2-4. Between the folded springs 5 and the sleeves 2 and 3, rings 6 and 7 are screwed on the thread. The sleeve 4 is made in the form of a glass. Several strips 8 are located along the axis of the screw 1 at an equal distance from each other. Two levers are pivotally attached to the ends of each of the strips 8: levers 9 and 10 to one end, levers 11 and 12 to the other. Levers 9 are pivotally attached to the screw base 1, levers 10 to sleeve 2, levers 11 to sleeve 3 , and the levers 12 - to the sleeve 4. The base of the screw 1 is a flange 13, in the grooves of which there are several movable crackers 14 and pins 15. The crackers 14 are hingedly fastened along the axis of the screw 1 by the sleeve 17, fitted with stoppers 18 s screw 19. The sleeve 17 is supported on the spring 2O, which is in contact with the threaded ring 21. D processing the diameter of the claws 15 from the flange 13 to the flange 13, preliminarily using nuts 2, punching the studs 23. Unscrewing the J 9, freeing the sleeve 17 and moving it towards the threaded ring 21. At the same time, the sleeve 17c helps the arms 16 shift rusks 14 to the axis of the screw 1, screw 19, press the stopper 18 to screw 1, fixing the position of the sleeve 17. Rotating the rings 6 and 7, set the strips 8 accordingly, depending on the angle of inclination of the cone and its diameter. The cone is put on the mandrel, with its large diameter resting on the flange 13. The center of the tailstock is used to move the sleeve 4 along axis 1, and with the help of levers 9-12, slightly attach the strips 8 to the inner surface of the cone. Unscrewing the Eint 9, release the sleeve 17, which under the action of the springs 2 O moves along the axis of the screw 1, and with the help of levers 16 brings the crackers 14 to the inner surface of the processed cone, resting them on the latter. The sleeve 17 is fixed in this position, pressing the screw 1 with the stopper 18 to the screw 1. The clamps 15 press the outer surface of the cone and fix them to the position with the help of nuts 22. The screw 24 fixes the position of the cone, and the center of the tailstock 4, tightly clamp the strap 8 t the inner surface of the cone. Removing parts from the mandrel is performed by withdrawing the center of the tailstock. Such fastening of thin-walled parts does not deform them and expands the range of fixed blanks. Claims of Invention Amendment for the processing of thin-walled parts comprising parallel to the axis of the central screw of the bar, pulled apart in the radial direction by means of m h, hingedly connected to the ends of the bars and with limited moving elements mounted on the screw, characterized in that, in order to simultaneously and independently open different ends of the bars to different diameters, each the end of the strap is pivotally connected along the lever, and at the ends of the screw are located movable axially relative to each other pads about hinges under the levers, and the partially movable elements are composed from a nut and a sleeve freely moving along the screw and connected with each other by elastic elements. 2. The mandrel according to claim 1, characterized in that one of the ends of the screw has a flange bearing a fixed sticking carrier mounted on the shaft in the radial direction.