SU958012A1 - Apparatus for sheet forming by liquid - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to die tooling.

A device for sheet metal stamping with electro-hydraulic effect elimination / containing an energy carrier, a cylinder with a working cavity filled with 1 lnd, a matrix and discharge electrodes IJi are known.

A disadvantage of this device is the complexity of the design and operation, as well as the high cost of the device, due to the use of dissimilar energies in the punching process.

The closest in technical essence and the achieved result to the invention is a device for sheet metal punching, comprising a housing with a working cavity, a matrix mounted on it and a hydraulic one. a system with a pressure pipe, which includes check valves, a hydraulic accumulator and a hydraulic multiplier, a torus with cavities of high and low pressure 2.

A disadvantage of this device is the long duration of the process of the piece process (compaction due to the small range of control of the energy of the pulses of the pressure of the liquid and the speed of filling the volume of the die cavity with the liquid and the impossibility of obtaining working pulses of high porosity pressure.

The aim of the invention is to intensify the stamping process.

This goal is achieved by the fact that in the sheet punching device a liquid comprising a housing

10 with a working cavity, a matrix installed on it and a hydraulic system for supplying fluid to the working cavity with a pressure line, into which non-return valves are integrated, a hydroaccumulator

15 and a hydraulic multiplier with low and high pressure cavities, the matrix is spring-loaded relative to the housing, and the device is equipped with a replaceable inertial mass mounted on the matrix,

20 as well as a metering pulsator valve integrated into the flow line connecting the hydraulic accumulator with the working cavity of the housing, the pressure pulsating valve connecting the high pressure multiplier of the hydraulic multiplicator with the working cavity of the housing, two-way distributor and reversing pulsatile valve connecting the pressure body and low

30 pressure pump pressure.

The drawing shows schematically the proposed device, a longitudinal section.

The device comprises a housing 1 with a working cavity 2, mounted on it with the help of columns 3 matrix 4 spring-loaded by springs 5 relative to housing 1 fixed to a matrix | Tse 4 inertial mass b, a pressure line 7 of the hydraulic system connected to the working cavity 2 of housing 1 by means of a dosing valve valve 8 and check valve 9; with a low-pressure cavity 10 of the multiplier With a check valve 11 and a two-way two-way (2/2) distributor 12; with a high-pressure cavity 13 of a hydraulic multiplier non-return valve 14 and with an adjustable one-way Hydraulic accumulator 15, a reversing valve-pulsator 16 connected to a high-pressure multiplier 13 cavity 13 and with an on-off distributor 12, a pressure valve pulsator 17 connected with a non-return valve to the working cavity 2 of the housing 1 and with a cavity 13 high pressure multiplexer

In the cavities of high 13 and low 10 pressure of the hydraulic multiplier Raz there is a plunger 18 with diameter d and piston 19 with diameter D. A pressure ring 20 is installed between the die 4 and the housing 1. In the die 4 there are holes 21 for air discharge. The working cavity 2 of the housing 1 is connected. With a drain line 22 by means of droplets 23 and a drainage annular groove 24. The springs .5 are preloaded by adjusting nuts 25 ..

The pressure valve-pulsator 17 is controlled via channel b, and the reversing valve-pulsator 16 through the channel C .. P i, Pg and P, P3 and P3, respectively, the opening pressure of the metering 8, pressure 17 and reversing 16 valve pulsators , P (| -. Pressure to control the opening of the pressure pulsator valve 17.

The device works as follows. . . ...

The fluid along the pressure line 7 charges the adjustable hydraulic accumulator 15 and through the non-return valve 14 fills the plunger cavity 13 of the hydraulic multiplier. The plunger 18, together with the piston 19, moves down (according to the diagram) and displaces the fluid from the cavity 10 to the drain through distributor 12, which is in the extreme low position. When the plunger 18 with the piston 19 is moved to the lowest position and when the pressure P is reached in the cavity 13, the reversing valve-pulsator 16 triggers.

Switch the distributor 12 to the highest position. In this case, with further increase in pressure in the pressure line 7, the fluid through the check valve 11 enters the cavity 10 of the hydraulic multiplier and moves porien 19 with the plunger 18 upward, compressing the liquid in the cavity 13 of the hydraulic multiplier to the pressure Pj determined by the corresponding D

and R. pressure setting

wearing

d

actuation of the metering valve of the pulsator 8, which also determines the charging energy of the hydroaccumulator 15 (Pj PI-p-)

When pressure in pressure line 7 increases to P. P, j, the metering valve pulsator 6 is actuated and through a check valve 9 sends a pulse of low (determined P) fluid pressure to the working cavity 2. During the discharge of the hydroaccumulator 15, the pressure in line 7 falls and, when Pg is up to the Ru values in the control line, opens the pressure valve-pulsator 17. At the same time, a high-pressure pulse is supplied to the working cavity 2 through the open valve 13. combining high and low energy fluids into the working cavity allows to intensify the process of sheet punching with liquid. To adjust the values of the impulses of fluid pressure from the working CAVITY 2, an adjustable throttle 23 serves, and possible leaks that can occur with a certain course of the matrix 4 with a replaceable inertial mass 6 upwardly, retracted through the groove 24. Depending on the material to be processed of the workpiece 26 and the recommended technological process, the matrix 4 can be or rigidly fixed relative to rpusa 1 or resiliently mounted by means of springs 5. Adjustment method clamp die 4 is determined by the nuts 25 on the threaded portion of the guide.

The operation of the hydraulic drive in the automatic mode of supplying pulses of fluid pressure of the calculated energy into the working cavity 2, their frequency and sequence are determined by the time of fluid supply from the pump to the pressure line 7 ..

The proposed device for sheet metal punching can be used for drawing, cutting, punching holes in the sheet material. At the same time, the technological process of processing sheet pressure is significantly intensified. The process of feeding them is automated

Claims (1)

Claim A device for sheet metal stamps containing fluid, containing a housing with a working cavity, a matrix mounted on it, and a hydraulic system for supplying fluid to the working cavity with a pressure line, into which check valves, a hydraulic accumulator and a hydraulic booster with low and high pressure cavities are integrated. Particularly, in order to intensify the stamping process, the matrix is spring-loaded relative to the housing, and the device is equipped with a replaceable inertial mass mounted on the matrix, as well as a metering pulsator valve connected to the pressure supply line that connects the hydraulic accumulator to the working accumulator cavity 5 of the housing, a pressure pulsating valve connecting the high-pressure cavity of the hydraulic booster with the working cavity of the housing, Two-position. a distributor and a reversible 10 pulsating valve connecting the high and low pressure cavities of the hydraulic multiplier.