SU1551464A1 - Method of trimming flash in forgings and die for effecting same - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to technology and devices for trimming forgings. The purpose of the invention is to increase the efficiency of the process and improve the quality of the forgings obtained. The scraping method is carried out by setting the forgings with a burr on the die, applying a force to the burr with its bending in the direction of application of the indicated force and pushing the forging through the die with a discharge. Before folding, the shaving is made by cutting it in thickness in one working stroke with the application of force to the shroud and pushing through the forging. The scrap cutter stamp contains a cutter with a shoulder in the area of the cutting edge, a drive punch with a sleeve for bending over the cut, mounted concentrically with the punch on the outer side of its side, as well as an elastic element placed concentrically with the punch with force closure on it. The stamp also contains a sleeve for trimming the plume located in the gap between the punch and the sleeve for bending the plume. The trimming sleeve oblo interacts with the elastic element. During the operation of the stamp, a recut is made and then it is folded over. The working end of the punch acts on the forging, pushing it through the die. 2 sec. and 1 z. p. f-ly, 3 ill.

Description

SP

ate

The invention relates to the processing of metals by pressure, in particular to technology and devices for trimming forgings.

The purpose of the invention is to increase the efficiency of the process and improve the quality of the forgings obtained.

FIG. 1 shows a forged with a burr forging laid on the cutting edge of the cutting matrix, the initial position of the stamp; in fig. 2 - forging with a burr cut along the thickness along the forging contour; in fig. 3 circumcision forging, imposing a stamp in the final position.

The scraping method is carried out by setting the forgings with a burr on the die, applying a force to the burr with its bending in the direction of application of the indicated force and pushing the forging through the die with a discharge. Before bending, the burr is cut in thickness in one working stroke with application of force to the burr and pushing through the forging.

Example. A trimming was carried out on a 40x steel forging with an outer diameter of 150 mm and a burr of 3 mm thickness. Cutting was performed on a thickness of 1.5 mm. The force required for the final separation of the burr from the body of the forging 5 amounted to 20,220 kg according to calculations.

The round-off trimming punch consists of a cut matrix 1 with a shoulder 2 and a cutting edge 3, a punch 4 with a working end 5, a sleeve b for cutting cushioned with an edge 7 that interacts through a resilient element 8 through screws 9 with a punch 4 fitted with an element for bending burrs in the form of bushings 10, fastened with a screw 11 with a punch.

The operation of the stamp is carried out as follows.

The stamped die A forgus B is laid on the trimming matrix 1 with the protrusion 2 and the cutting edge 3. The working stroke of the press slide is engaged. When lowering, the sleeve 6 with its working edge 7 touches the skirt B and presses it. As a result, there is a cutout oblo B on both sides of the edges of the matrix 3 and the edge

7 bushings 6 at a certain depth.

8 this time, the working end 5 of the punch 4 presses against the supporting part B of the forgings A, as a result of which the forging separates from the bluff along the notch line, falls into the failing window G of the matrix I, and the b block B is bent off by the sleeve 10.

In the last stage of separating the wrap B from the forging A, the sleeve 6 with its edge 7 under the influence of the elastic element 10 touches the edge 3 of the matrix 1.

But since the elastic element 9 acts as a shock absorber, a hard impact of the edges 2 and 7 is prevented. The shape of the edges 2 and 7 may be different depending on the required conditions.

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Claims (3)

1. The method of trimming the blades on forgings by placing the forgings with the blades on a hollow die, applying force to the shoals with bending it in the direction of applying the indicated force and pushing the forgings through the die with stripping, as well as removing the blades and forgings from the working area, different that, in order to improve the efficiency of the process and improve the quality of the forgings obtained, before bending the strip is cut in thickness during the working stroke in order to apply force to the burr and push the forging. 2. The method according to claim 1, distinguishing between the fact that the notch is cut along the outer contour of the body of the forging. 3. A shredder for trimming the forgings, containing a cut matrix mounted on the bottom plate with a ledge in the cutting edge area, a driving punch with a sleeve for bending the Oblo mounted concentrically with the punch on its outer side surface, and also placed concentric with the punch with force closure on A resilient element, characterized in that it is provided with a sleeve for notching the rim, a sleeve for bending the rip is placed with a gap relative to the punch and rigidly connected with it, a sleeve for notching the rip and elastic The element is installed in the specified gap with the ability to interact with each other. Fig1 Fis2