SU1207569A1 - Method of producing bushes - Google Patents

Description

The invention relates to the technology of manufacturing sheet punching sleeves and can be used in mechanical engineering.

The purpose of the invention is to improve the quality of the sleeves by increasing their dimensional accuracy.

FIG. Figure 1 shows the position of the strip in the sequential punch before the bending of the Section of the strip corresponding to the end portions of the two blanks; in fig. 2 is the same, after bending the end portions of the two blanks and separating the blank from the strip, in FIG. 3 shows the position of the workpiece in the device for final bending of the sleeve J in FIG. 4 - finished sleeve in the device for final flex.

The manufacturing method of the sleeve is as follows.

The lane 1 is fed along guides to a stamp of a sequential action until it overlaps the bending position formed by the matrix 3 fixed on the plate 4 and the punch 5 fixed on the top plate 6. During the slide movement down, the clamp 7 presses the strip 1 to the matrix 3. The bending punch -, sleep 5 on the matrix .3 oppresses the section of the strip corresponding to the end sections of the two blanks. The Central part 8 of the specified section of the strip

performed along the radius of curvature of the finished part. Part 9 of the specified area, adjacent to the Central part, bend with curvature, reverse

the curvature of the central part. At the end of the stroke of the stamp, the central 8 and the parts of the bending area adjacent to it are calibrated due to the hard impact of the punch 5 on the matrix 3.

After the punch is opened, the initial billet is moved one step to the stop 10 and fixed with a curved section at the position of the segments. At the next stamp stroke, the separation is made.

piece blanks 11 cutting knife 12 in the plane of symmetry of the curved section. Then piece workpiece 11 is placed on the Cams 13, mounted on the plate 14 of the bending

devices. When the press crawl runs down, the punch 15 with the cams 13 performs the final bending of the workpiece 11 until the finished sleeve 16 is obtained.

Using the proposed method allows to obtain sleeves of the same curvature at all sites along the circumference. When such sleeves are used as part of various units, the contact area increases, thereby reducing wear and increasing the durability of the unit.

L

Rig.2

fPus.d

Par.4

Claims (1)

METHOD FOR MANUFACTURING BUSHES, 'in which the strip section corresponding to the end sections of two workpieces is bent, performing its central part along the radius of curvature of the finished part, separating the workpiece in the symmetry plane of the curved section of the strip and final bending of the workpiece to obtain a finished sleeve, characterized in that, in order to improve the quality of products by improving dimensional accuracy, parts of the curved section adjacent to the central bend with curvature, the inverse curvature of the central part, and at the end of ki curved portion _{of the} calibrated. © SU ,, 1207569 Fig. / 1,121