SU916025A1 - Compound die for producing hollow parts without bottom - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular for sheet metal stamping and can be used in the manufacture of parts of saddle shape from flat annular blanks.

A well-known stamp is a combined action for obtaining fallen parts without a bottom from flat ring blanks, containing in the upper part a punch-matrix for flanging the outer contour and aperture, and in the lower part a punch for flanging, installed coaxially with the punch [1).

The disadvantage of this stamp is that it is impossible to obtain a bent and flanged part on the outer contour and the hole detail in one operation.

A well-known stamp is a combined action for obtaining hollow parts without a bottom from flat annular blanks, containing a punch-matrix installed in the upper part for flanging the outer contour and apertures and an annular section are flexible, as well as a stamp placed coaxially with the die-matrix punch on the bottom plate for flanging WITHOUT BOTTOM CONDITIONERS

2

tour, a punch for flanging the hole and a movable bending matrix that presses the workpiece to the punch 5 matrix [2].

The disadvantage of the famous stamp

is that it is impossible to get a detail of a saddle shape on it.

The purpose of the invention is to obtain a saddle shaped de ^ 0.

This goal is achieved by the fact that in the stamp of the combined action for the production of hollow parts without a bottom from flat annular workpieces, containing 15 installed in the upper

parts of the punch-matrix for flanging the outer contour and holes and flexible ring section, as well as containing placed on the bottom

2θ plate coaxially with the die-die matrix for flanging the outer contour, puncheon for flanging the hole and the movable bending matrix that presses the workpiece to the mandrel25 well-matrix, the matrix for flanging the outer contour is mounted with the possibility of axial movement under the action of the bending die and equipped with means preventing it ,

30 turn around the longitudinal axis.

3

916025

four

An annular cavity is made in the matrix for flanging the outer contour, and the bending matrix is made with an annular protrusion that is “placed in an annular cavity.

Means to prevent rotation of the matrix, made in the form of at least one column that is offset from the axis of the matrix.

FIG. 1 shows a stamp, section; in fig. 2 - a flat ring billet.

The stamp contains the upper movable plate 1, the punch-matrix 2 for flanging the outer contour and the hole and flexible ring section.

On the bottom plate 3 of the stamp coaxially with a punch-die a punch 4 is installed for flanging the hole, a matrix 5 for flanging the outer contour, a movable bending matrix 6 associated with buffer 7. An annular cavity 8 is made in the matrix for flanging the outer contour, and on the bending matrix is made an annular protrusion 9 placed in an annular cavity. The matrix for flanging the outer contour is installed with the possibility of axial movement under the action of the bending matrix and is equipped with means preventing its rotation around the longitudinal axis, which are a column 10 mounted offset from the axis of the matrix. The bottom half of the stamp covers the holder 11, the workpiece 12 is set in the stamp stencil 13. The die-die, bending die, die for flanging the hole and die for the outer contour have a profile corresponding to the saddle shape of the piece to be made 14.

The stamp works as follows.

Flat billet 12 oval-shaped stack stencil 13 in the stamp. Buffer 7 holds the bending matrix 6 and the matrix 5 for flanging the outer contour in the upper position. When the working stroke of the punch-matrix 2 bends the workpiece and produces a partial flanging of the hole in the workpiece. Upon further downward movement, the flanging of the hole is made. As soon as the matrix 5 for flanging the outer contour will fall on plate 1, the flanging of the outer contour of the workpiece is performed. This completes the process for obtaining a saddle-shaped part. When moving

ten

top plate 1 up bending matrix 6 removes the detail 14 from the punch 4 for flanging the hole.

The ring sections of the part adjacent to the small axis of the oval billet remain undeformed during bending of the workpiece, and the ring sections adjacent to the major axis of the oval billet receive the greatest deflection.

The stamp provides details of the saddle shape.

Claims (3)

Claim 15 1. Stamp combined action (for hollow parts without bottom from flat annular blanks, containing a punch-matrix installed in the upper 2θ for flanging the outer contour and holes and bending the annular section, as well as containing punches placed on the bottom plate of the punch co bending the movable die presses the workpiece to the punch-matrix of m n h and i dc ayuschi in that, in order to obtain de hoist saddle ³⁰ form a matrix for the flanging of the outer contour is arranged to ae th displacement under the action of the bending template and is provided with means, which rotate predot35 its rotation about the longitudinal axis. 2. Stamp pop. 1, distinguishing with me. the fact that in the matrix for flanging the outer contour is performed on the annular cavity, and the bending the matrix is made with an annular protrusion and it is placed in an annular cavity. 3. Stamp pop. 1, which differs from I in that the means preventing the rotation of the matrix are made in the form of at least one column displaced relative to the axis of the matrix. '* ed