RU208416U1 - Wire electrode tensioning, rewinding and stabilizing mechanism of EDM machine - Google Patents

Abstract

The utility model relates to the elements of electroerosive machine tools, in particular for processing a whole range of industrial parts. The technical problem is to improve the accuracy of processing parts. The technical result is aimed at reducing the vibration of the wire and its consumption. The specified technical result is achieved in the mechanism for tensioning, rewinding and stabilizing the wire electrode of an electroerosive machine, containing a housing, on the outer surface of which there is a coil with a wire electrode stretched through the rewind rollers, a receiving coil, a block for adjusting the wire electrode holders, while an additional braking unit is made, a damping wire tension element, a breakage sensor with an encoder for the uniformity of the movement of the wire electrode, dies, while the coil with the wire electrode is installed on the braking unit, and the receiving coil is configured to receive energy from the engine to perform rotational movements at a predetermined speed for winding the wire electrode; the spinnerets are mounted on the upper and lower guide half-brackets and are connected to the body through the adjustment block of the wire electrode holders.

Description

Technology area

The utility model refers to the elements of EDM machines, in particular, for the processing of a whole range of industrial parts.

State of the art

From the prior art, a unit for guiding and rewinding a wire electrode is known, which includes an upper and lower guide brackets, a wire alignment unit, a winding spool, a take-up spool and guide rollers, which are arranged on the surface of the rack to ensure the maximum length of the wire electrode from the spool to the entrance to the upper guide. half-cobs. The track of the wire electrode is located on the front panel of the rack, which is rigidly fixed to the head of the machine. Before machining the workpiece, the wire electrode is guided by the guide rollers to the guide halves, in the front end part of which ceramic guides are fixed, in which the position of the wire electrode is fixed. When machining a part, the position of the half-cage guides, with a wire electrode tucked in them, remains unchanged, and the part is moved using a 2-coordinate table controlled by the CNC system (patent RU 93717 U1 05/10/2010).

The disadvantages of the prototype are that, having a non-rigid base, the EDM machine with a guiding and rewinding unit is subject to increased vibrations and does not represent the ability to produce high-precision parts, the arrangement of the rack with a guiding and rewinding unit of the wire electrode takes up a useful volume and reduces the working area.

Disclosure of the essence of the utility model

The technical challenge is to improve the accuracy of the machining of parts.

The technical result is aimed at reducing the vibration of the wire and its consumption.

The specified technical result is achieved in the mechanism of tension, rewinding and stabilization of the wire electrode of an electroerosive machine, containing a housing on the outer surface of which there is a coil with a wire electrode, rewinding rollers, a receiving coil and an adjustment unit for the wire electrode holders, it additionally contains a wire electrode braking device that dampens a wire electrode tension element, a break sensor with an encoder for the evenness of the wire electrode and die movement, while it is configured to pull the wire electrode through the rewinding rollers, a wire electrode tension damping element, a break sensor and a die to a take-up spool, which can be installed on a motor for making rotational movements and winding the wire electrode, where the coil with the wire electrode is mounted on the braking device, and the dies are mounted on the upper and lower guides on the floor brackets and connected to the body through the adjustment block of the wire electrode holders.

Description of drawings

The declared utility model is illustrated using graphic materials, where:

FIG. 1 - mechanism of tension, rewinding and stabilization of the wire electrode of the EDM machine, side view on the right;

FIG. 2 is a front view;

Numbering of designations of elements of the mechanism.

1, 3 - Dies

2 - Lower hemiscoba

4 - Upper half-brace

5 - Wire braking device

6 - Unit for rewinding and stretching the wire electrode

7 - Control panel for the generator and the movement of the wire electrode

8 - Damping wire tensioning system

9 - Rewinding rollers

10 - Break sensor

11 - the Receiving coil

The device works as follows:

A coil with a wire electrode is installed on the wire braking device 5. The wire electrode is pulled through: rewinding rollers 9, wire tension damping device 8, breakage sensor 10, nozzles 1, 3 installed on the upper and lower half brackets 2, 4 - up to the take-up spool 11. Receiving the coil 11, by means of the motor on which it is installed, pulls the wire, with the speed selected on the control panel for the movement of the wire electrode 7. The speed of movement is constantly monitored by the breakage sensor 10; when winding from a reel installed on the braking device 5, and winding on the take-up reel 11, their diameter is constantly changing.

Since the wire on the spool is not evenly wound, wire jerks occur during operation, which is compensated by the wire tension damping device 8.

The wire braking device 5 produces a constant tension with the required force depending on the diameter of the wire electrode.

Die 1, 3 uses natural diamonds with a hole for a wire electrode with an accuracy of +2 microns.

Due to the passage of the wire electrode through high-precision dies 1, 3, constant monitoring of the speed of movement, interference, as well as compensation of jerks - there is almost no vibration at the cut site.

Due to the possibility of choosing the tension force and rewinding speed, it is possible to select the most economical operating modes and reduce wire consumption.

Claims (1)

A mechanism for tensioning, rewinding and stabilizing the wire electrode of an electric discharge machine, containing a housing on the outer surface of which there are a coil with a wire electrode, rewinding rollers, a take-up coil and an adjustment unit for wire electrode holders, characterized in that it additionally contains a wire electrode braking device, a damping element wire electrode tension, a break sensor with an encoder for the uniformity of the movement of the wire electrode and the die, while it is configured to pull the wire electrode through the rewinding rollers, the wire electrode tension damping element, the break sensor and the die to the take-up spool, which can be installed on the motor for making rotational movements and winding the wire electrode, and the coil with the wire electrode is installed on the braking device, and the dies are installed on the upper and lower guide half-brackets and are connected to the housing a mustache through the adjustment block for the wire electrode holders.

Images