SU761067A1 - Die for producing sleeves - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to equipment for sheet metal stamping.

Known stamp for the manufacture of sleeves of tape material, containing a trimming mechanism, a preliminary bending mechanism, made in the form of a punch fixed on a movable plate, which is mounted on a fixed mandrel plate, and a final bending mechanism, made in the form of a matrix and a carriage placed on a fixed plate as well as the punch '[1].

However, this stamp has limited technological capabilities: it does not provide for the manufacture of bushings from a thin material with a thickness of about 0.8-2 mm from a tape with relatively large chamfers on the longitudinal edges.

The aim of the invention is the manufacture of thin-wall sleeves of tape with chamfers on the longitudinal edges.

For this, the stamp is provided with a lever, which interacts with the movable plate, mounted on a fixed plate with the possibility of swinging in the plane of the punch axis, and an emphasis limiting its movement, a punch of the final bending mechanism and a workpiece puller with a pre-bending mechanism mandrel.

2

the indicated lever, the working part of the mandrel of the preliminary bending mechanism is made with protrusions on the side surfaces and with a flat in the upper part, which interacts with the working edge of the puller, and is installed with the possibility of reciprocating movement in the material feed direction and with the possibility of limited angular movement in the plane the axis of the stamp, the puller is made in the form of a slider spring-loaded in the direction of the axis of the stamp, with a plane inclined toward the matrix and ending with a working edge.

15 In FIG. 1 shows the proposed stamp; in fig. 2 - section A — A of FIG. one; in fig. 3 — section B — B of FIG. one.

The stamp contains a tape feed mechanism (not shown), a cutting mechanism and fur 20 s of the preliminary and final

are flexible.

The cutting mechanism is made in the form of a knife 2 mounted on a fixed plate 1, a cutting edge 3 made on pu25 anson 4, a pressure lever 5 fixed in plate 6 of a spring-loaded roller 7 and

stop 8.

The mechanism of preliminary bending contains, in addition to the punch 4, with the I-shaped working 30 whose cavity and the beveled end of the frame 761067

3

ku 9, mounted on axis 10 on carriage 11, reciprocating in the direction indicated by arrows, and puller 12. Mandrel 9 is made with shoulders 13 on side surfaces and with lip 14 on non-working part. The rotation of the mandrel on the axis 10 is provided by the spring 15 and is limited to the stops 16 and 17.

The final flexible assembly contains a matrix 18 mounted on a fixed plate 1, mounted on a carriage 19 on an axis 20, a mandrel 21, and a puller 22 of the finished part from a mandrel 21, as well as a punch 23 located on a lever 24, the axis of rotation of which is parallel to the direction of movement of the carriages 11 and 19. The rotation of the lever 24 is carried out under the action of the spring 25 and the plate 6 and is limited to the stop 26. The puller 12 is mounted on the lever 24 with the possibility of sliding along the punch 23, the carriage 11 and 19 are rigidly interconnected by a chuck 27.

The stamp works as follows.

The tape is fed until it stops 8. When the plate 6 is lowered, the roller 7 through the lever-clamp 5 provides the clamping of the tape to the knife 2. The butt end of the punch 4 bends its end, the cutting edge 3 cuts the flat billet at an angle to its plane, which makes it possible to increase the density of the finished joint bushings. The punch 4 bends the workpiece along the mandrel 9 to obtain an i-shaped blank 28, while the mandrel rotates against the stop 17. When lifting the plate 6 with the punch 4, the spring 15 lifts the end of the mandrel 9, and the carriages 11 and 19 with the mandrels 9 and 21 move to the left under drive action, for example, cam. While the workpiece 28 under the action of the collar 13 on the mandrel 9 is fed into the matrix 18.

Then the carriages 11 and 19 with the mandrels 9 and 21 are moved to the right. The puller 12 holds the workpiece 28 in the cavity of the matrix 18. The presence of flats 14 in the upper part of the mandrel 9, along which the puller 12 slides, ensures reliable removal from the mandrel of a workpiece made of thin material. When running to the right, the mandrel 21 is inserted into the workpiece 28 and when lowered, the plate 6 rotates the lever 24 with the punch 23,

Ensuring final molding of the sleeve on the mandrel 21 and the matrix 18.

At the end of the molding sleeve, the lever 24 retracts the punch, and the end of the mandrel 21 with the part rises.

At the next course of the carriages 11 and 19 to the left, the puller 22 provides removal of parts from the mandrel 21. The sleeve falls through the window in the plate 1 into the appropriate container.

Claims (1)

Claim A stamp for the manufacture of sleeves of tape material, containing a preliminary bending mechanism, made in the form of a punch fixed on a movable plate mounted on a fixed mandrel plate, and a final bending mechanism made in the form of an array and a carriage placed on a fixed plate, and also a punch, characterized in that, in order to be able to manufacture thin-walled bushings from a tape with chamfers on the longitudinal edges, it is provided mounted on a fixed plate with the possibility of swinging in the plane of the w axis The amp lever interacting with the movable plate and the stop limiting its movement; the punch of the final bending mechanism and the work puller from the pre-bending mechanism mandrel are installed on the specified lever; the working part of the pre-bending mechanism mandrel is made with projections on the side surfaces and with a flat in the upper part interacting with the working edge of the puller and installed with the possibility of reciprocating movement in the direction of the material feed and with the possibility of limited angular Moving in the plane of the punch axis, the puller is made in the form of a slide that is spring-loaded in the direction of the punch axis with a plane inclined towards the matrix and ending with a working edge.