SU1038045A1 - Die for producing hollow forgings with flanges - Google Patents

Description

: Ad eo

o U1 The invention relates to metal forming and can be used for stamping hollow forgings with flanges. A stamp for obtaining hollow forgings with flanges, containing a matrix with an ejector sleeve, is known on the rifle and inner punches, which are installed with the possibility of relative adjustment movement. one relative to another l. In this stamp, the raising of the outer punch in the process of obtaining the tone of the bone part of the forging occurs due to the force transmitted through the forging itself. Since during this period there is no backwater from the outer surface of the forging, it does not exclude the possibility of losing its stability, which will lead to the deviation of the outer forming forging from the straightness, and this is often unacceptable. The purpose of the invention is to improve the quality and accuracy of the products. The aim is achieved in that in the stamp to obtain full flange forgings containing a matrix with a sleeve and ejector, the outer and inner punches, installed with the possibility of relative adjustment movement, have longitudinal directions on the inner punch. the grooves and the bayonet lock element, the bayonet lock element is made on the inner surface of the matrix, and it is mounted with the possibility of an adjustment movement On the outer punch there are two elements of a bayonent lock, interacting respectively one with a counter element of the lock and guide grooves of the internal punch, and the other with a counter element of the movable matrix bayonet lock, while the external punch is installed with rotation around the inner punch. Fig. 1 shows the initial position and the end of the flange formation; figure 2 - section DL in figure 1; on fig.Z section bb in figure 1; in fig. - a stamp at the moment of the beginning of the formation of the thin-walled part of the forging and at the time of termination; in FIG. 5, the figure of the FIG. figure 6 is a cross section dD in fig.A. The stamp consists of an internal punch 1, which is made composite. Through the base of the punch, with which it is attached to the press plate 2, an external punch 3 is put on it. By means of a bayonet connection, the external punch 3 can be engaged with the internal punch or slide along its grooves (Figures 1 and 2). A collar ot of its bayonet connection with the matrix k is provided on the outer surface of the external punch 3 (Figures 1 and 3). The bayonet connections are made in such a way that when the external punch 3 is turned by 60 it comes out of engagement with the internal punch 1 and engages with the matrix A (FIG.). When the outer punch and the die are engaged, they are able to move together with respect to the inner punch 1 and the sleeve 5 along the guides (Fig.); The sleeve 5 is rigidly fixed on the bottom plate 6 of the press. To remove the forgings from the die, an ejector 7 is provided. The stamp works as follows. Before starting, the external punch 3 enters into engagement with the internal punch 1 (the flange b rests on the slot with Figs. 1 and 2}. The heated cylindrical billet 8 is placed on the ejector 7 or on the shoulders of the die (Fig. 1). Moving down the plate 2 by the punch 1 with an external punch attached to it 3, the workpiece is deposited and the flange is assembled. At the same time, the external bead q of the punch 3 of the bayonet connection slides along the grooves of the matrix k (Figures 1 and 3). For the following The deformation of the outer punch 3 is removed from the engagement with the punch 1 and is engaged with the matrix k (Fig. A 61. Then, when the punch moves down, the thin-walled part of the forging is squeezed out, while the punch 3 and the die under pressure of the metal matrix 4 into a collar f sleeve 5. The deformation process is completed.

The opening of the stamp occurs in two stages. The movement of the plate. 2 upwardly remove the inner punch 1 from the thin-walled portion of the roll. The first; Stage 1 is completed at the moment of contact of the collar b with the lower part: Notch j. After that, the punch 3 is removed from the engagement with the die and the die is completely opened. Pusher 7 removes the forging from the die and returns the die to the original position.

The stamp has the advantages that the die is made movable, which ensures the stability of the thin-walled part of the forging during hot

deformation, and its outer profile repeats the profile of the matrix, ensuring the accuracy of the geometrical dimensions and gives the opportunity to get thin-walled forgings with massive (| 1antsev. The movable punch is alternately rigidly connected with the inner punch and the matrix, ensuring the deformation and extraction of the forgings from the stage. Proposed stamp designed to work on presses of simple operation, which are simple in design and in operation, energy-intensive as metal-consuming as opposed to the double action press with the same weight .

FIG 6

Claims (1)

A STAMP FOR PRODUCING HOLLOW FORGINGS WITH FLANGES, containing a matrix in which a sleeve and an ejector are installed, external and internal punches installed with the possibility of relative adjustment movement, so that in order to improve the quality and accuracy of the products , on the inner punch, longitudinal guide grooves and an element of the bayonet lock are made, on the inner surface of the matrix there is an element of the bayonet lock, and it is installed with the possibility of adjusting movement relative to the sleeve and in of the ejector, and on the outer punch there are two elements of a lock lock, interacting with one, respectively, with the οτ-ry branch of the lock and the guiding grooves of the inner punch, and the other with the return element of the bayonet lock of the movable matrix, while the outer punch § is mounted for rotation around the inner punch. SU „„ 1038045 1 1038045 *