SU995987A1 - Die for drawing in double action presses - Google Patents

Description

(5) DRAIN STAMP FOR DOUBLE ACTION PRESSES

V

The invention relates to the processing of metals by pressure and relates to die tooling.

A stamp for a two-pass stretch is known, comprising a punch, a die, a pressure and a pressure force adjustment unit, made in the form of a hydraulic cylinder with an annular cross-section, having a piston-ring with several rods, and a throttling device mounted in the piston-ring l D.

The disadvantage of this stamp is the complexity of its design, due to the complexity of the clamping force adjustment unit containing the hydraulic system.

The closest to the invention is a dp draw draft on double-acting npedahs, containing a matrix rigidly fixed at the junction of the press, mounted on the inner and outer slide of the press, respectively, a punch and a clamp, as well.

unit for adjusting the clamping force of the flange part of the stamped blank C2.

The disadvantage of this stamp is its limited technological capabilities. This is due to the fact that the adjustment unit allows only to regulate the clamping force in a certain range. Regulation of the clamping force in a wide

10 range is possible only when replacing the entire clamp unit.

The purpose of the invention. Expansion of technological capabilities by increasing the range of regulation

15 tightened down.

Claims (2)

This goal is achieved by the fact that in a die for drawing on presses of double action, containing a matrix rigidly fixed on the press table, mounted on the inner and outer slide of the press, respectively, a punch and a clamp, as well as a unit for adjusting the force of pressing the flange part of the stamped blank, the matrix is provided with an annular recess located on the side of its working end, and at least two radial grooves located directly under the recess, and the knot of the clamping force is made as installed in the annular recess of the matrix of an elastic element consisting of two metal rings with an elastic gasket between and, and two-arm levers interacting with it, placed in the radial grooves of the matrix with adjustable displacement, one shoulder of each of which is profiled and the other is kinematically connected with punch. FIG. 1 shows a stamp, a general view, a longitudinal section (to the left of the axis of symmetry of the section a stamp is in the initial position, to the right - at one of the stretching moments); in fig. Node 1 on fi g. one . The stamp contains rigidly secured to it on the table 1 of the press a matrix 2, mounted on the internal slider 3 press punch 4 with a flange 5, fixed on the external slider 6 of the press clamp 7 and the pressing force control unit. An annular recess and at least two radial grooves 8 located directly under the recess are made in the matrix 2 from the side of the working end. Pressure adjustment control unit. The mama is made in the form of an elastic element installed in an annular recess of the matrix 2, consisting of two metal rings 9 with an elastic gasket 10 between them, and two shoulder arms 11 interacting with it, held in radial grooves 8 matrices 2. One shoulder of the levers 11 is made profiled, and the other by means of t g 12. Passing through the coaxial holes made in the clamp 7 and the matrix 2 is kinematically connected with the flange 5 of the punch O Levers 11 are axially pivotally mounted on the sliders 1, to which the rulers 15 are attached. The sliders 14 are mounted on the guide shafts 16 with the possibility of installation movement. The shafts 16 are fastened to the supports 17. To the matrix 2, screws 18 secure the stop 19 of the elastic element. 874 The stamp works as follows. During the drawing process, the workpiece 20 is pressed against the matrix 2 by a clamp 7 fixed on the outer slider 6 and deformed by the punch. With this, as the punch moves downwards, the gigs 12 fixed to the flange 5 are communicated to the levers; 11 angular displacement. Turning around axis 13, the levers 11 move the resilient element upwards, thereby controlling the pressing force over the entire support surface of the flange of the workpiece 20. The movement of the elastic element is controlled by the limiter 19. The pressing force is determined by the movement of the elastic element, which depends FROM LENGTH of the shoulder 11 variable by adjusting the movement of the sliders 14 on the shaft 16 and profiling according to a certain law of the levers shoulder 11. The position of the sliders is determined by the ruler 15 attached to it. Parts of the type of glasses and boxes made of sheet aluminum alloy with a yield strength (5 kgmm. The proposed device, compared with the known, provides more than I reliable clamping of the workpiece, which in turn allows precise and high-quality stretching, reducing scrap). on. The possibility of adjusting the clamping force in a wide range expands the technological capabilities of the punch. Formula of the Invention Stamp for drawing on double action presses, containing a matrix rigidly fixed on the press table, m The punch and clamp, respectively, as well as the unit for adjusting the pressing force of the flange part of the stamped billet, which, in order to expand the technological capabilities of the punch by increasing the range of adjusting the pressing force, in the die (i made an annular recess, located on the side of its working end, and at least two radial grooves located directly under the notch, and the knot force adjustment unit