SU1049155A1 - Die for single-impression upsetting of increased thickness portions on rod blanks - Google Patents

Description

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The invention relates to the processing of metals by pressure, in particular, to the design of devices for single junction extraction of thickenings on a rod not in the height of blanks, and can be used in cases where the length of the planting part exceeds the critical one. A stamp is known for single junction landing, nodules on core blanks, containing a matrix, nyaHqoH, as well as a supporting tool in the form of sections 1. Also known is a stamp for single junction landing of nodules on rod blanks, movable upper and fixed lower plates with a punch installed on them and a tool for supporting the workpiece, as well as an intermediate plate with a detachable matrix mounted on it, mounted with vertical movement and connected to the top and bottom plates using guide columns 2. . The disadvantages of the known stamps are not enough wide nomen latura manufactured products and not high quality at the critical length of the disembarked part. The purpose of the invention is to expand the range of manufacturing parts and improve their quality. The goal is achieved by the fact that a stamp for single-reversing of thickening on rod blanks, containing a movable upper and a fixed lower plate with a punch and means of supporting the blank, respectively, as well as an intermediate plate with a detachable matrix mounted on it, installed with the possibility of vertical Movement and associated with the upper and lower plates for the direction of the columns of the columns, is equipped with racks with wedge surfaces made from the side of the upper plate, Replaced on the bottom plate and spring-loaded cushions with double-sided wedge beams installed in guides on the intermediate plate, which is also made with wedge bevels on the side facing the top plate, the sliders are installed with possible interaction with the wedge racks and the intermediate plate, FIG. 1 shows a stamp at the moment when the punch touches the workpiece before disembarking) in FIG. 2 - bottom of the stamp, the plan; in fig. 3 shows a stamp at the end of the landing process in FIG. 4 is the same, after jamming of the split matrix before disembarking, in FIG. 5-i Fo, after splitting the matrix in FIG. 6 is a schematic of the conversion of the original preform into a part. The stamp contains lower 1, intermediate 2 and upper 3 plates, connected by guide columns 4 and 5 and bushings b, the matrix 7 with vertical connector, guide bars 8, punch 9 with holder 10 are mounted and fixed. Intermediate plate 2 connected to the bottom plate 1 with screws 11 with the possibility of vertical movement (Fig. 3). A support device is mounted on columns 4, consisting of strips 12 and elastic elements 13 (FIG. 1). On the bottom 1 and intermediate plate 2, a mechanism is mounted to communicate the matrix 7 with the additional movement relative to the movement of the punch 9, consisting of wedges-slides 14, moving in the guides 15, screws 16, elastic elements 17 and 18, and racks 19. On the intermediate 2 and upper 3 plates, a device for closing the split matrix 7 is mounted, which includes a wedge 20, an elastic element l 21 and screws 22 (Fig. 4). The stamp works as follows .; Heated on the length of the landed part up to a certain temperature, the workpiece 23 is in a stamp. To prevent the curvature of the workpiece 23, before starting the landing, only a part of the workpiece 1 remains, the length of which does not exceed the critical length. The part of the billet landed, equal to p.6 - 1, is in the guide bush / not punctured) of the matrix 7 (Fig. 10). The upper plate 2 carries out the process of landing and the simultaneous movement of the intermediate plate 2 under the influence of the upper plate 3 through the wedge-slider 14. At the same time, the matrix 7 slides over the workpiece 23 and all new sections of the plate slide, however When the upper 3 and intermediate 2 plates move down during the landing process, the speed of the latter exceeds the speed of the upper plate. wedges 14 in the horizontal direction when interacting with fixed stands 19. Thus, since the speed of movement of the matrix 7 is greater than the speed of the punch 9,

the free length 1 of the workpiece 23, which is located in the landing zone, is continuously increased and at the end of the process the length is 1 (the planted part can significantly exceed the critical length of the workpiece 11, X 2.5 .d, fig. 3). The value B1 1 - 1 of additional displacement of the matrix 7 relative to the movement of the punch Y during the landing process depends on the angle oC of the wedge-slider 1.4 and on their horizontal movement h when interacting with the uprights 19 (Figs. 1 and 3) and I is determined by the dependence

 d h ig l. At the stage of joint movement of the intermediate 2 and upper 3 plates I downwards, at the thickening site, the required volume of metal is gained and only the preliminary shape of the flesh is obtained (shit. Final thickening, height Iji and diameter D, attached to the closed draft of the planted part in the matrix 7 at the stage when. the intermediate plate-2 rests on the lower plate 1 and the matrix becomes I-fixed (Fig. 3). At this stage of the work of the stamp with fixed wedges x-sliders 14, the upper plate 3 together with the punch 9, compressing the elastic elements 18, continues to move in from 12 to size sufficient to fill the die cavity 7 (FIG. 3) ..

The stiffness and dimensions of the elastic elements 18 (Fig. 1 and 3) are chosen in such a way that the force of their compression significantly exceeds the total

force, elastic elements 13; and friction forces, arising when the matrix 7 slides along the workpiece 23. In this,. case, in the first stage of the stamp, when the intermediate 2 and top.

n 3, the plates move together downwards, the elastic elements 18 are not deformed.

After the end of the landing at the return stroke of the press ram, first

wedging of the detachable matrix 7 occurs, and then with the help of elastic elements 21 and screws 22 the semi-matrix open up to a certain amount. lei (Fig. 5). Ready item

extracted from the stamp.

The use of the stamp proposed by the design will allow to expand the range of manufactured de-molds.

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Claims (1)

($ 4) A STAMP FOR A ONE-JOINED LAYOUT OF THICKNESS ON STEM Billets, containing a movable top-, nude, and fixed bottom plate with a punch and support means (blanks ,!, as well as an intermediate plate with a detachable matrix mounted on it, installed with the possibility of vertical Moving And connected with the upper and lower plates with the help of guide columns, so that in order to expand the range of manufactured parts and improve quality, it is equipped with racks and with wedge surfaces made from the upper plate side, fixed on the lower plate and spring-loaded creepers with double-sided wedge bevels installed in guides on the intermediate plate, which is made also with wedge bevels from the side facing the upper plate, and the crawlers are installed with the possibility of interaction with the wedge surfaces of the uprights and the intermediate plate, p