RU2391173C2 - Hydraulic hammer for sheet punching - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention refers to metal pressure processing and can be applied in processing machines of sheet punching. Hydraulic hammer includes cylinder with fluid and plunger, guide tubes, falling load, table and 0.1-200 m high tubing filled with fluid up to 0.001-199.5 m height. Tubes incorporate plungers taking matrix form at top end. Falling load includes solid top platform, matrix, tensile element, middle platform, bottom platform with cavity holding two-way tensile element, two-way punch in the form of two matrices, two-way punch in the form of two puncheons, and two-way punch in the form of matrix and puncheon. Middle platform features cylindrical cavities filled with fluid or compressed air. The cavities holds plungers with top surface set against fluid or compressed air and tensile element. Plungers feature matrix at the top end.

EFFECT: enhanced precision of item punching, prolonged service life of production tools, reduced vibration and noise level.

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Description

The invention relates to the field of pressure processing and can be used in the manufacture of technological machines for stamping operations.

Known press hammer for sheet stamping, containing a cylinder with a liquid and a plunger, guide tubes, a table, a platform with cylindrical cavities filled with liquid, in which plungers are installed with the lower plane resting on a table (RU 2003114117 A, 01.20.2005, B21J 7 / 00).

The disadvantages of the known press hammer for sheet stamping are as follows:

- breakage and rapid wear of the stamp, which reduces the accuracy of manufacturing parts;

- high noise level and increased vibration of the press hammer and the premises and workshops.

The technical problem to which the claimed invention is directed is to increase the accuracy of manufacturing parts, increase the service life of steel dies, reduce vibration and noise.

To solve the problem, a press hammer for sheet stamping, containing a cylinder with a liquid and a plunger, guide tubes, a falling load and a table, characterized in that it is equipped with casing pipes with a length of 0.1-200 m, filled with liquid to a height of 0.001-199, 5 m and having plugs on the rock side, and located in the mentioned casing pipes with liquid support, plungers made with feed channels and on the upper side in the form of matrices, the falling load is made in the form of an upper monolithic platform on which filled tanks filled with liquid, equipped with plugs with holes, valves and sleeves, a matrix, an elastic element, a middle platform made with cylindrical cavities filled with liquid or compressed air under a pressure of 0.01-25 MPa, in which plungers are installed, and channels for supplying said cylindrical cavities of a liquid or compressed gas and their discharge, and equipped with fittings in which ball check valves are installed, a lower platform with a cavity in which a double-acting elastic element is installed side action in the form of two matrices, one of which is designed for stamping a deformable sheet with the lower plane of a double-sided elastic element, a double-acting stamp in the form of two punches, one of which is designed for stamping a deformable sheet in another matrix of the mentioned double-sided stamp in the form of two matrices, and a double-acting stamp in the form of a matrix for stamping a deformable sheet with another punch of a double-acting stamp in the form of two punches and a punch for stamping deformable sheets in the matrix of plungers located in the casing, while the plungers of the falling load are mounted with the support of the upper plane on liquid or compressed air in the cylindrical cavities of the middle platform and an elastic element with the possibility of stamping the deformable sheet in the matrix of the falling load and are made with a matrix on the bottom end parts for stamping a deformable sheet with the upper plane of a double-acting elastic element.

The invention is illustrated in the drawing, which shows a press hammer for sheet stamping.

The sheet metal stamping hammer is equipped with casing pipes 1 0.1–200 m long, filled with liquid to a height of 0.001–199.5 m and having plugs 2 from the rock side, and plungers 3 made in said casing pipes supported by liquid, made with supply channels 4 and on the upper side in the form of matrices, the falling load is made in the form of an upper monolithic platform 5, on which containers 6 filled with liquid are installed, equipped with plugs 7 with holes, valves 8 and sleeves, a matrix, an elastic element 9, a middle platform 10, execution connected with cylindrical cavities 11 filled with liquid or compressed air under a pressure of 0.01-25 MPa, in which plungers 12 are installed, and channels 13, 14 for supplying and discharging the liquid or compressed gas into said cylindrical cavities, and equipped with fittings, in which are installed ball check valves, a lower platform 15 with a cavity in which a double-acting elastic element 16 is installed, a double-acting stamp 17 in the form of two matrices, one of which is designed for stamping a deformable sheet 18 of the lower plane the bone of the double-sided elastic element 16, double-acting punch 19 in the form of two punches, one of which is intended for stamping the deformable sheet 20 in the other matrix of the mentioned double-acting punch in the form of two dies, and double-acting punch 21 in the form of a matrix for punching the deformable sheet 22 with another punch of a double-acting punch in the form of two punches and a punch for stamping deformable sheets 23 in the matrix of plungers located in the casing, while the plunger S 12 of the falling load mounted with the support of the upper plane on the liquid or compressed air in the cylindrical cavities of the middle platform 10 and the elastic element 9 with the possibility of stamping the deformable sheet 24 in the matrix 25 of the falling load 5 and made with a matrix on the end of the lower part for stamping the deformable sheet 26 of the upper the plane of the elastic element 16 of bilateral action.

Press hammer for sheet stamping works as follows.

Before starting the operation of the press hammer, valves 8 are opened, atmospheric-pressure fluid from tanks 6 is gravity-fed through hoses, fittings with ball check valves (hoses, a fitting and a ball check valve are not shown in the drawing) and a supply channel 13 in the cavity 11 of the middle platform cylinders 10, the leaked fluid through the kinematic gaps between the plunger and the cylinder is held by a sealing ring and accumulates in the grooves of the plungers and the discharge channel 14 associated with the specified sleeves and containers with liquid in the closed I flush the system.

The casing cavities 1 are filled with water from the water supply network through the hoses, a fitting with ball check valves (hoses, a fitting and a ball check valve are not shown), the supply channel 4, made in the specified pipe and plunger 3.

Then the platforms 5, 10, 15 of the falling load, the plungers, the elastic element 16 and the dies 17, 19, 21 are moved down. The punch of the stamp 21 at the moment of impact presses the deformable sheets 35 of the matrix 6 of the plungers 3 located in the cavities of the casing 1. At this moment, the plungers 3 receive a compression shock wave, which is transmitted to the lower planes of the plunger and moves from top to bottom along the fluid column enclosed in the casing 1, creating pressure on the plug 2 and the rock. Since the maximum amplitude of the shock pulse of compression decreases with increasing liquid column, the vibration transmitted to the rock decreases sharply.

With sudden braking of the bodies of the falling load, the deformable sheets are simultaneously pressed into the corresponding dies. On the one hand, the punch of the double-acting stamp 19 pushes the deformable sheet 22 into the matrix of the double-acting punch 21, and on the other hand, the punch of the punch 19 presses the deformable sheet 20 into the matrix of the double-acting punch 17. The elastic element 16 of the bilateral action of the platform 15 presses the deformable sheet 18 into the die matrix 17 with the lower plane, and the deformable sheet 26 presses the deformable sheet 26 into the matrix of the plunger 12. The plunger 12, due to the inertial forces of the falling load platforms 5, 10, creates a sharp increase in pressure fluid enclosed in the cavities 11 of the cylinders of the middle platform 10, transmitted to the elastic element 9, the latter presses the deformable sheet 24 into the matrix 25.

It should be noted that with increasing fluid pressure in the cavities 11 of the cylinders of the middle platform 10 and in the cavities of the casing 1, the ball valves close the inlet channels 13, 4.

Autonomous fluid supply from tanks installed on the platform of the falling load into the high-pressure chamber allows you to raise the falling load to any height and exclude long sleeves and the pump from the design.

When compressed air is supplied with a pressure of 10-25 MPa from cylinders or directly with a high-pressure compressor along the hoses, fittings with check ball valves, a supply channel 13 in the cavity 11 of the cylinders of the middle platform 10, it is possible to exclude the elastic element 9 from the structure and press the deformable sheet 24 into the matrix 25 at the same time, using the energy of compressed air and the energy of a falling load, both during cold and hot stamping of products.

A set of suspended single-acting and double-acting dies for a falling load allows you to get several products from sheets of different thicknesses and dimensions with different mechanical properties of the material in one working stroke of the falling load.

Claims (1)

Press hammer for sheet stamping, containing a cylinder with a liquid and a plunger, guide tubes, a falling load and a table, characterized in that it is equipped with casing pipes with a length of 0.1-200 m, filled with liquid to a height of 0.001-199.5 m and having plugs from the side of the rock, and in the said casing pipes supported by liquid, plungers made with feed channels and from the upper side in the form of matrices, the falling load is made in the form of an upper monolithic platform on which are installed liquid-filled containers equipped with plugs with holes, gates and sleeves, a matrix, an elastic element, a middle platform made with cylindrical cavities filled with liquid or compressed air under a pressure of 0.01-25 MPa, in which plungers are installed, and channels for supplying liquid to said cylindrical cavities or compressed gas and their discharge, and equipped with fittings in which ball check valves are installed, a lower platform with a cavity in which a double-acting elastic element is installed, a double-acting stamp in the form of two matrices, one of which is designed for stamping a deformable sheet with the lower plane of a double-sided elastic element, a double-acting stamp in the form of two punches, one of which is designed for stamping a deformable sheet in another matrix of the mentioned double-acting stamp in the form of two matrices, and a double-acting stamp in in the form of a matrix for stamping a deformable sheet with another punch of a double-acting stamp in the form of two punches and a punch for stamping deformable sheets in matrices plungers located in the casing, the plungers of the falling load mounted with the support of the upper plane on liquid or compressed air in the cylindrical cavities of the middle platform and the elastic element with the possibility of stamping the deformable sheet in the matrix of the falling load and made with a matrix on the end of the bottom for stamping the deformable sheet by the upper plane of a double-acting elastic element.

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