SU515563A1 - Stamp for the manufacture of bar products - Google Patents

Description

The invention relates to press-forging equipment and can be used to manufacture items such as the shutter of a truck platform.

A stamp for the manufacture of products from a twist containing a top and a bottom plate, a punch mounted on them and clamping semi-matrices, as well as an ejector with an individual drive is known.

In order to avoid product displacement from the processing position when the clamping semi-matrix retracts, the die is movably mounted in the bottom plate from the individual power cylinder with a clamp, and the punch has a groove for pushing the latter at the end of the stroke, while the locking cylinder is interlocked with the ejector drive.

FIG. 1 shows a press, a general view; in fig. 2 - bottom plate in the initial position, plan view; in fig. 3 - the same, in working position; in fig. 4 is a section along the line A-A in FIG. 3; in fig. 5 is a section along BB in FIG. 3; in fig. 6 shows a section along B-B in FIG. 3

The stamp contains a bottom plate 1 on which a cutting knife 2 and a fixed clamping half-matrix 3 are fixed. In the latter, an ejector 4 with a pneumatic cylinder 5 is installed. On the bottom slide there are also guides 6 and 7 in which

a movable clamping half-matrix 8 and a landing punch 9 are placed. The semi-matrix 8 and the punch 9 have bevels for interacting with wedges 10 and 11, respectively, fixed in the upper plate 12 of the stamp. Springs 13 and 14 are used to return the semi-matrix 8 and the punch 9 to the initial position. On the upper plate there are also guides 15, in which the slider 16 is moved, pressed by the spring 17. In the slider, another clamping semi-matrix 18 moves, which has bevels for interaction with the wedge 19, also mounted on the top plate.

The return of the half-matrix 18 to its initial position is carried out by the spring 20, and its fixation relative to the bottom plate - by the spike 21.

A retainer 22 with a pneumatic cylinder 23 and a spring 24 is mounted on the bottom plate, and a recess for the retainer is made in the outboard punch 9. To control the pneumatic cylinders 5 and 23, the pneumatic hammer 25 is designed.

The operation of the stamp is as follows.

Claims (1)

The end of the bar, equal to the length of the workpiece with the areas heated to the forging temperature, is fed through the cutting knife 2 into the space between the semi-matrix 3 and 8 and the stroke of the press slide is activated. In the process of lowering the top plate 12, the wedge 10 acts on the bevel of the half-matrix 8 and then moves to the half-matrix 3. In the process of moving the half-matrix 8, the end nearest to the bar acts on the rod and starts bending around the relatively non-moving half-matrix 3. Next, the end of the half-matrix 8 touches the rod adjacent to the knife 2, and the cutting of the bar begins. In the first stage of the cut, this end of the half-matrix also carries out a partial rounding of the bar relative to the fixed half-matrix. With the further course of the clamping semi-matrix 8, the product is bending and forming its configuration. At this moment of operation of the device, the slider 16 with the clamping floor of the matrix 18 is above the rod and does not prevent its bending. Upon further lowering of the upper plate 12, the free movement of the wedge 10 occurs, in which the vertical plane of the wedge interacts with the vertical bevel of the half-matrix 3. At the same time, the slider 16 contacts the lower plate 1 and is fixed relative to it. Next, the wedge 19 moves the semi-matrix 18, which clamps the portion of the bar adjacent to the landed head. At the end of the slide stroke, the CLIN 11 acts on the punch 9, which lands the head, and the upper inclined plane of the wedge 10 acts on the inclined bevel of the half-matrix 8, and the latter carries out the final design of the configuration of the bent part of the product. This also makes a free run of the wedge 19, in which the clamping half-matrix 18 and the slide 16 remain in place. In the process of moving parts 4, 8, 9, 16 and 18, the corresponding springs are compressed. At the end of the slide stroke, the latch 22, under the action of the spring 24, is aligned with the slot of the heading pawl 9. At the return stroke of the slide, the parts 8, 18 and 16 return to their original positions, and the headful 9 remains in the working position and fixes the part by the head preventing it from being extracted from the stream of the half-matrix 3 due to the friction forces between the base of the head and the half-matrix 18. This is necessary, since premature extraction may entail touching the product behind the half-matrix 18 as it moves upwards and leads to emergency situation. After the slider has been raised, compressed air is supplied to the front cavity of pneumatic cylinder 23 by means of pneumatic hammer 25, clamp 22 compressing the spring 24 is removed from the slot of the outboard punch 9 and the latter returns to its original position under the action of the spring 14 and releases the head of the product. When the latch moves, a hole opens on the lateral surface of the pneumatic cylinder 23 and air enters the rear cavity of the pneumatic cylinder 5. The ejector 4 moves, removes the part from the half-matrix 3 and returns together with the latch to its original position. Finished product through. the windows in the bottom plate and the press table are placed on the conveyor and then into the container for this product. Claim of the invention Stamp for manufacturing bar products containing upper and lower plates, respectively a punch mounted on them and clamping semi-matrices, as well as an ejector with an individual drive, characterized in that, in order to avoid displacement of the product from the position of processing semi-matrix , it is equipped with a latch movably mounted in the bottom plate from an individual ram, and on the Puaison there is a groove for trapping the latter at the end of the stroke, while the ram locking cylinder okirovan driven ejector. G. LJ e zzffl / IPuz.3 . raue.-ff / 2 6 Bj oBeflfff / frK FIG. five