SU1258560A2 - Arrangement for hydraulic mechanical drawing - Google Patents

Description

The invention relates to the processing of metals by pressure, and relates to devices for hydro-mechanical stretching and is an improvement of the device according to the author. St. 925482.

The purpose of the invention is the expansion of technological capabilities by ensuring the manufacture of parts of different diameters.

The drawing shows the proposed device, a longitudinal section.

The device contains a matrix 1, the cavity of which is filled with liquid, a punch 2, mounted on the piston rod 3 of the hydraulic cylinder 4, its axial displacement, a pressure compensation unit acting on the bottom of the workpiece, made in the form of an additional hydraulic cylinder 5 coaxially connected to the hydraulic cylinder 4 of which is rigidly connected the piston 3 of the hydraulic cylinder 4 and has a diameter smaller than the diameter of the punch 2, the cavity of which is communicated with the cavity of the matrix 1, the fluid pressure control unit in the cavity of the matrix 1, made in the form of two hydra cylinders 7 and 8, the plungers 9 and 10 of which are pivotally connected to each other by means of rocker arms} 1 with a swing axis 12 installed with the possibility of longitudinal movement, and a clamp I3 with a pressure ring 4.

The cavity of the hydraulic cylinder 7 communicates with the cavity of the matrix 1, and the cavity of the hydraulic cylinder 8 - with the cavity of the additional hydraulic cylinder 5.

The cavity of the hydraulic cylinder 4 communicates with the pump 15, and the cavity of the hydraulic cylinder 5 through the check valve 1.6 - with the pump 17.

In addition, in the drawing designated stamped part 8.

The device works as follows.

A billet (not shown) is placed on the matrix 1 filled with liquid, pressed against the pressing ring 14. Then, pump 15 supplies oil to the hydraulic cylinder 4 of the plug 2, and from pump 17 the oil flows through the check valve 16 to the additional hydraulic cylinder 5 and the hydraulic cylinder 8 of the node simultaneously adjustment. . Moving down, punch 2 with piston 3 and plunger 6, get to 585602

It begins to deform it, thus compressing the liquid in the die, which enters the hydraulic cylinder 7 and moves the plunger 9 upwards.

5 The rocker 11 transfers this movement to the plunger 10, and the oil from the hydraulic cylinder 8 is forced out with the necessary pressure into the additional hydraulic cylinder 5 with: the non-return valve 16. The shoulder arm f is f, and the rocker arm 1 9 9

is determined from the condition that at different diameters of the punch 2 an additional hydraulic cylinder 5 optimally compensates the force acting on the bottom part of the workpiece from the liquid side (the compensation force is somewhat less than the back pressure force of the liquid on the bottom part of the workpiece

20 at high pressure and the need to provide fluid friction between the workpiece and the die during hydro-mechanical stretching).

From these conditions, a ratio of 25 is derived.

sewing

D

2 to

Tg d

30 where K is the force reduction ratio (k is less than one); D - diameter of the punch; d - diameter of the plunger of the additional hydraulic cylinder;

35 1 shoulder of the rocker to the axis of the plunger U of cylinder 8; 2 arm of the rocker arm to the axis of the plunger 9 of the cylinder 7. From the ratio it can be seen that if 40 the diameter of the punch 2 is less than the diameter of the plunger 6 of the additional cylinder, then the shoulder F should be correspondingly less than the shoulder t, the spider And, and vice versa. Adjusting the ratio of the 45 arms of the rocker arm 11 is carried out by moving the swing axis 12 to the left or right.

Thus, the adjustment unit allows one to draw parts of different diameters on the same device with an optimal reduction in energy costs when the diameters of the replaceable punch are both smaller and larger than the constant diameter of the plunger 55 of the additional cylinder of the compensation unit, which ensures expansion of technological capabilities devices.

Compiled by V. Muslimov Editor O. Bugir Tehred I. Veres Proofreader L. Pilipenko

Order 5063/11 Circulation 783 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113033, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

DEVICE OF THE DAY OF HYDROMECHANICAL EXHAUST by author St. 8 ”925482, characterized in that, in order to expand technological capabilities by providing the manufacture of parts of various diameters, it is equipped with a unit for regulating the fluid pressure in the matrix cavity, made in the form of two hydraulic cylinders, the plungers of which are pivotally connected to each other by means of a rocker arm with a swing axis installed with the possibility of adjusting movement along the rocker arm, moreover, the cavity of one hydraulic cylinder is in communication with the cavity of the matrix, and the cavity of the other with the cavity of the additional hydraulic cylinder and compensation. > hO