SU1503967A1 - Die for close-die forging - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular, to the manufacture of products such as a sleeve with a flange. The purpose of the invention is to improve product quality and tool life by reducing the contact friction between the workpiece and the deforming tool that forms the cavity of the product. In the die, the top and bottom plates carrying the deforming tools are connected by rods by means of threaded connections. The threaded sections are made at the ends of the rods placed in the respective plates. Due to this, when a force is applied to the upper plate, the lower one moves towards it, adjusting the contact friction conditions between the deforming tool placed in the hole of the ring blank and the material from which it is made. The rods have an additional threaded section that interacts with the slider. And the latter, through the sleeve, which is movable in the direction of the axis of the stamp, detaches the article from the bottom plate of the stamp in order to facilitate its removal. 3 il.

Description

This invention relates to the processing of metals by pressure, in particular to the manufacture of products such as a sleeve with a flange.

The aim of the invention is to improve product quality and tool life by reducing the contact friction between the workpiece and the deforming tool that forms the cavity of the product.

FIG. 1 shows a vertical section of the stamp in the initial position; in fig. 2 shows section A-A in FIG. one; in fig. 3 - stamp at the time of the deformation process.

The stamp comprises an upper plate 1 with a hollow deforming tool 2, a lower plate 3 with a deforming tool 4 for shaping the cavity of the product. The top 1 and bottom 3 plates are connected by kinematic connection elements 5, each of

which has two end (a and c), as well as additional middle (b) threaded sections. These elements are made in the form of rods mounted on the base of the roller on the rolling bearings 6 with the possibility of free rotation. In the section b of the rod, a slider 7 is placed, which opposite its end, facing the longitudinal axis of the stamp, interacts with a corresponding groove 8, made parallel to the longitudinal axis of the stamp along the periphery of the sleeve 9 mounted on the intermediate plate 10 by means of guides 11 with the possibility of movement along the longitudinal axis stamp. The intermediate plate 10 itself is rigidly mounted on the base with the aid of the guiding elements 12 necessary for ensuring the movement of the lower plate 3 relative to the base.

SP

about with so

Od

E. Jumeites 5 of the kinematic connection of the upper and lower plates have threaded sections and and b with threads of the same direction, and the thread turns are determined by the dependence

/ gb

;

{(}

ia.

ha,

where / a, 16 are the threads of sections a and b, respectively;

ha is the stroke of the upper plate 1 interacting with the threaded section a;

/ i6 - the stroke of the slider 7 installed on the threaded portion of the b rod. The thread direction in sections a and e is opposite and the stroke depends on what the speed of movement of the bottom plate 3 is required, which in turn is determined by the cross section of the cavity of the deforming tool 2 and the annular cavity between tools 4 and 2. Paul-: wniKa 7 the free end is installed in the groove 8, 1 is filled in the sleeve 9. In addition, a groove 13 is made under the groove in the groove. 1 to 7 towards the end of its turn when the working stroke is niTaMiia at a distance determined by the formula

/ 1 | yb-d / 1b;

f, M S te.

where.L / W - the value of non-income of the plate 3 in the extreme upper position.

In the extreme lower position of the punch, the sleeve 9, the intermediate plate 10, hollow hp (|) ormiriding tool 2 and deforming the P1II tool 4, which forms the floor of the finished product, 1i, form the stream of the stamp, and the annular gap between the tools 2 II 4 is a compensator for placing excess metal volume of the ring blank 14.

The cavity of the sleeve 9 is formed by adjoining cylindrical and conical sections. MSH on the site and the rod 5 vy- iKb iiieiia pesamotramozas.

llJTaMii works as follows.

The ring billet 14 is placed in a screw 9. During the course of the downward movement, the upper plate 1 acts on the threaded portion a of the stem D), which, resting on the support 6, and. It slips into position, slider 7 emerges from recess 13 and continues to move along |) 1. in the area of b in the viz along the groove 8, with the tulk 9 under the action of the common weight (IC on intermediate ;;.: 11 to 10 but n; | 11 |) avl 1O1Tim 11. At B |) ameiiii i Γ ) bottom 11, 1 1 with 3 installed on iiei i 1111 ct |) pent 4 moves upward at a speed given by the ratio of the stubs of a and b, but directing the elements 12. CooTnonienne 1111yy displacements 2 and 4 is given as follows;) i ipa, (.. -h o and the beginning of the working stroke ns-1I) T,: j4) ii goes To the upper end of the ioi nuKii I. When stamping along the pipe

five

50

ABOUT

5 0 5

five

0

The struc ture 4 gives rise to friction forces directed along the surface of its contact with the workpiece 14, which can be reduced by selecting the corresponding ratios of thread chaps of quince sections. Such a condition of deformation ensures a reduction in the stamping force and leads to a decrease in tool wear. After the deformation is complete, the excess metal is displaced into the compensator. When plate 1 moves upward, element 5, resting on the support 6, rotates in the opposite direction, moving plate 3 downward, and tool 4 will exit from the hole. Its full release will occur when the non-yield plate 1 to the extreme upper position. At this moment, the end of the slider 7, moving along the threaded section b, falls into the recess 13 of the groove 8 due to the action of the friction forces in the threaded joint. After the slider 7 enters the recess 13, it will make further movement together with the sleeve 9 and the forging installed therein, remove the latter with a protrusion in the intermediate plate 10, which simplifies the process of removing the forging from the chip, since the latter is caught in the conical section of the sleeve 9.

Claims (1)

Invention Formula A stamp for closed die forging, mainly of products such as flanged bushings, containing a movable top plate with a hollow deforming tool, a bottom plate mounted on the base with a deforming tool rigidly mounted on it for shaping the product cavity, an intermediate plate with guide elements and mounted on her sleeve with slots under the slider relative to the sleeve, characterized in that, in order to improve the quality of the products and the durability of the tool by reducing the contact point Between the workpiece and the deforming tool for shaping the cavity of the products of the lower nlit is mounted movably on guide plates of the intermediate plate rigidly connected to the base with the possibility of being combined with the upper plate in opposite directions to reciprocating by postunational movement by means of kinematic connection, each of the form of a rod mounted perpendicular to the base, with the possibility of a free rotation of the rod relative to it; two end threaded parts of the same; 1, placed in the counter threaded holes of the upper and lower plates, as well as an additional middle threaded section, the thread direction of which coincides with the direction of the thread associated with the upper plate of the section, the grooves for discerning the facing to the longitudinal the axis of the stamp of the ends of the sliders are made on the periphery of the sleeve in the direction parallel to the said axis of the stamp, the opposite ends of the sliders are mounted on additional threaded sections of the rods with the possibility of returning reciprocating movement along the axis of the rod1; to it and the rotation limited relative to them, the sleeve is installed with the possibility of directional movement relative to the intermediate plate along the longitudinal axis of the punch, while its the cavity is made in the form of a cylindrical section and a truncated conical section facing the hollow deforming tool, facing a smaller diameter to the intermediate plate; the stamp, and the end threaded portion of the rod associated with the upper plate is made with non-braking threads. Chhchuchuuu. 7 ///////////////////////////////////////////////// // y FIG. f hcchchch X) -Xl FI.2 H h HCH; HCH / 7 Oif-i