SU551080A1 - Device for bending material - Google Patents

Description

3 plates 5 and three cylindrical fingers 6, displaced one relative to the other at an angle of 120 °. The central rod 7 is perpendicularly resilient to the plate and is made in the form of a polyhedron, the faces 8 of which BsaHMoneEci are inserted into the ends 9 of the cylindrical fingers 3 and 6. At the lower end 10 the central rod 7 is rigidly connected to the flange 11c with projections 12 for fastening the device vise (not shown). At the upper end 13, a thread is made and a washer 14 and a nut 15 are fitted to move the holder 2 along the stem 7. The holder may be a cgftssaHa driven or press slide. Cylindrical pins 3 and 6 can be fastened with screws 16. Pins 3 and 6 have a hard conical forming surface 17 and 18, the slope of which depends on the calculated values of the angle of elevation of the spring wave and its outer and inner diameters. Fingers 3 and 6 are offset from each other by an angle of 60. The device works as follows. A center annular spring billet is put on the centering central rod 7, which rests in the lower plane on three points of the conical surface 18 of the fingers 6 of the matrix 4. Then, the holder 2 is mounted on the centering rod with the fingers 3, which in turn are in contact with three points the upper plane of the spring blank, and with its ends 9 rests on the face 8 of the centering rod 7. This prevents

74

13

Claims (1)

Fig. 1 080 4 relative speed from the punch 1 and the matrix 4 during bending. The flexible workpiece of the spring 19 is carried out by moving the punch 1 along the central rod 7. In the case of: heat treatment of the spring 19, the punch 1 moves along the central rod 7 by means of a screw pair and a nut 15, clamped therein after deformation and serves the device for heat treatment, the modes of which are selected depending on the brand of spring material. Tests have shown that the springs made have a height difference in the corrugations of less than 0.1 mm and a high stability of the load characteristics. Apparatus of invention A device for bending material comprising cylindrical finger-shaped forming elements with forming surfaces located radially respectively on a holder and a bottom plate that also carries a central rod installed perpendicularly, characterized in that, in order to make wavy springs possible, the holder is made with a hole and is installed by means of this hole with the possibility of movement on the central rod, and the latter is made in the form of a correct set the faceplate and interacts with its faces with the ends of the cylindrical fingers.