RU131326U1 - ELECTROEROSION FIVE-ORDINATE WIRE-CUTTING MACHINE - Google Patents

Abstract

An electroerosive five-coordinate wire-cutting machine containing a bed, a three-coordinate electromechanical actuating unit, a two-coordinate electromechanical actuating unit mounted on a bed, an upper and lower chamber with current leads and guides for the electrode wire, an executive tool in the form of an electrode wire, and an electrode drawing unit -wires, a bath with a working fluid located between the upper and lower chambers, characterized in that the three-coordinate electromechanical the actuating unit is made in the form of a three-link manipulator with one rotational and two translational degrees of mobility, and the two-coordinate actuating unit is made in the form of a two-link manipulator located under the three-link manipulator and having one rotational and one translational degrees of mobility.

Description

The utility model relates to electroerosive five-coordinate wire-cutting machines. The utility model can be used for surface treatment of conductive billets, including those made of hard alloys and hardened steels of complex profile for the engineering, aviation, shipbuilding, oil and gas and construction industries.

Known EDM cutting machine for processing workpieces with an electrode-wire, containing a coordinate table for the relative movement of the workpiece and the electrode-wire and a coordinate table that determines the angle and direction of inclination of the electrode-wire. The guides of the electrode wire are placed on two straight articulated parallelograms located on one straight shoulder, the opposite arms of which are telescopically connected to each other. One of the adjacent shoulders of the lower parallelogram is pivotally mounted on a support fixed relative to the upper parallelogram, and one of the shoulders of the upper parallelogram parallel to it is pivotally mounted on a two-coordinate table that determines the angle and direction of inclination of the electrode-wire. The upper guide of the electrode wire is mounted on a slider located in the guides mounted on the upper parallelogram shoulder so that the slider can move along this shoulder. In this case, both the alignment of the guides of the electrode wire and the angle and direction of inclination of the electrode wire are saved (RF Patent No. 2098241, IPC V23N 7/10. 1997).

The disadvantages of this device include:

- low accuracy of EDM cutting, due to the use of helical gears;

- large moving masses that complicate the process of five-coordinate processing of parts of complex shape;

- unsatisfactory dynamic characteristics due to large moving masses;

- limited range of corner cuts.

- a complex mechanical assembly that includes elements that are located in the working area and are subject to increased wear and therefore require frequent maintenance and replacement.

Known electroerosive wire-cutting machine with linear electric motors, which includes:

- a carriage mounted on a bed with a linear electric motor for moving it in the horizontal direction of the X axis;

- the forearm, on which the lower chamber is fixed and which moves in the direction of the Y axis, located in the same plane as the X axis, but perpendicular to it;

- a carriage on which a forearm is mounted, mounted on the carriage and moving under the action of a linear electric motor in the direction of the Y axis. A linear electric motor of the X axis includes a magnetic path consisting of magnets and fixed on the bed, and an electromagnet that is mounted in the lower part of the carriage. The linear motor of the Y axis includes an electromagnet mounted on the upper surface of the carriage and a magnetic path mounted on the lower surface of the carriage (Patent 2002008085 (A1), IPC V23H 7/02 (IPC1-7): V23H 1/00; V23H 7/02 Publ. 24.01.2002).

The disadvantages of this device include:

- large moving masses that complicate the process of five-coordinate processing of parts of complex shape;

- unsatisfactory dynamic characteristics due to large moving masses;

- limited range of corner cuts.

- non-identity of coordinate fields “covered” by the upper and lower cameras.

The closest in technical essence to the claimed is an EDM wire-cutting machine that can process large workpieces and has a long travel along the axes U and V.

EDM wire-cutting machine includes a work table that is mounted on a bed and on which the workpiece is fixed. Coordinate movements of the executive tool of the EDM machine are implemented:

- a three-coordinate electromechanical actuating unit made in the form of a two-coordinate table having the ability to move along the orthogonal axes U, and V, which are parallel to the X, and Y axes, respectively, and installed on the upper part of the two-coordinate table pintles of the Z axis, realizing the third coordinate of movement of the upper chamber;

- two-coordinate electromechanical executive, made in the form of a two-coordinate table, along the X axis and along the Y axis, which drive the lower chamber.

(Japanese Patent No. 11048041, B23H 7/02, 02.23.1999).

The disadvantages of this device include:

- large moving masses of parts of the construction of the coordinate tables, complicating the process of five-coordinate processing of parts of complex shape;

- unsatisfactory dynamic characteristics, due to the large moving masses of the coordinate tables;

- limited range of corner cuts;

- lack of identical possibilities of coordinate movements of the upper and lower chambers;

- the impossibility of complete independence of movements of the upper and lower chambers. The technical results of the claimed model are:

- reducing moving masses and, thus, facilitating the process of five-coordinate processing of parts of complex shape;

- a significant reduction in metal consumption of equipment;

- by reducing the mass of moving nodes, improving the dynamic characteristics of the machine;

- increase the potential of the machine due to the identical possibilities of coordinate movements of the upper and lower chambers;

- an increase in the range of angular cuts and the realization of complete independence of the controlled paths of the upper and lower chambers;

- through the use of linear electric motors, an increase in the accuracy of electric discharge machining.

The technical result is achieved due to the fact that the electroerosive five-coordinate wire-cutting machine containing the bed, three-coordinate electromechanical actuating unit and two-coordinate electromechanical actuating unit mounted on the bed, the upper and lower chambers with current leads and guides for the electrode wire, an executive tool in the form of electrode-wire, as well as the broach of the electrode-wire, a bath with a working fluid located between the upper and lower chamber according to the utility model, it is equipped with a vertical strut, while the three-coordinate electromechanical actuating unit is mounted on a vertical strut and made in the form of a three-link manipulator, one of the degrees of mobility of which is rotational, and the two-coordinate executive node is made in the form of a two-link manipulator, one of the degrees of mobility of which is also made rotational.

The claimed utility model is illustrated by graphic materials, where figure 1 shows a diagram of the inventive electroerosive five-coordinate wire-cutting machine.

On a vertical rack 1 is a three-coordinate electromechanical actuating unit, made in the form of a three-link manipulator, consisting of:

- shoulder 2, performing a rotational motion when changing the generalized coordinate φ ₂ ;

- console 3 mounted on the shoulder 2 with the possibility of translational movement when changing the generalized coordinate S ₂ ;

- pinoli 4, mounted vertically on the console 3 and performing translational motion when changing the generalized coordinate S ₃ .

At the end of the pin 4, the upper chamber 5 is fixed with a current lead and guides for the electrode wire. The movement of the pin 4 is identical to the movement of the Z coordinate in the classical kinematic scheme of the EDM machine.

On the bed 13 is a two-link manipulator, which is located under the three-link manipulator, consisting of:

- shoulder 6, performing a rotational motion when changing the generalized coordinate φ ₁ ;

- console 7 mounted on the shoulder 6 with the possibility of translational motion when changing the generalized coordinate S ₁ .

On the console 7 is fixed the lower chamber 8 with a current lead and guides for the electrode wire.

In addition to the manipulator, the bath 9 is fixedly mounted on the bed 13. In the bath on the ceramic stand there is a working table for basing the workpiece 10.

On the shoulder 2 is fixed node broach wire 11. The spent wire enters the container 12.

The claimed utility model works as follows.

At the beginning of the technological cycle, the wire drawing unit 11 provides the electrode-wire feed with a given constant speed. Next, the electrode wire through the arm 2, the console 3 and the pin 4 is fed into the upper chamber 5 with a current lead and guides, and then into the lower chamber 8, and through the console 7 and the arm 6, the spent electrode wire enters the container 12 installed next to the bed 13.

Between the upper chamber 5 and the lower chamber 8, the electrode wire performs the process of electroerosive cutting of the workpiece 10, mounted on the desktop, in the bath 9 with the working fluid.

During the operation of the electroerosive five-coordinate wire-cutting machine, the arms 2 and 6, as well as the arms 3 and 7, move along the generalized coordinates φ ₂ and φ ₁ , and S ₂ to S _1, respectively. The generalized coordinate 5g is set before the start of the work of the EDM five-coordinate wire-cutting machine with the possibility of its change in the process of EDM cutting.

Thus, the above information indicates the fulfillment of the following set of conditions when using the claimed technical solution:

- an object embodying the claimed technical solution, when it is implemented, is intended for performing electrical discharge machining of surfaces of conductive billets, including those made of hard alloys and hardened steels of a complex profile for machine-building, aviation, shipbuilding, oil and gas and construction industries;

- for the claimed object in the form as described in the independent claim of the utility model formula, the possibility of its implementation using the means and methods known from the prior art on the priority date as described in the application materials is confirmed;

- the object embodying the claimed technical solution, when implemented, is able to ensure the achievement of the technical result perceived by the applicant.

Therefore, the claimed subject matter meets the requirements of patentability “novelty”, “inventive step” and “industrial applicability” under applicable law.

Claims (1)

An electroerosive five-coordinate wire-cutting machine containing a bed, a three-coordinate electromechanical actuating unit, a two-coordinate electromechanical actuating unit mounted on a bed, an upper and lower chamber with current leads and guides for the electrode-wire, an executive tool in the form of an electrode-wire, and also an electrode drawing unit -wires, a bath with a working fluid located between the upper and lower chambers, characterized in that the three-coordinate electromechanical the actuating unit is made in the form of a three-link manipulator with one rotational and two translational degrees of mobility, and the two-coordinate actuating unit is made in the form of a two-link manipulator located under the three-link manipulator and having one rotational and one translational degrees of mobility.

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