RU152714U1 - DEVICE FOR REMOVING ELECTRODES OF CONTACT DOT MACHINES - Google Patents

Abstract

A device for removing electrodes on contact spot machines, comprising a housing with an axial hole for a removable electrode, a support nut and a clamping device installed in the housing, including clamping elements for contact with a removable electrode, characterized in that in the housing from the side of the hole for the removable electrode through 120 ° there are three rectangular grooves, each of which has a clamping element in the form of a liner, and three corresponding threaded holes are made in the wall of the housing, each of which is installed behind a clamping screw with the possibility of fixing the clamping element, while at the end of each clamping screw there is a handle for manually tightening the clamping element, and the support nut is made with an internal groove with the possibility of its contact with the free surface of the electrode holder.

Description

Technical field

The utility model relates to technological processes, namely, welding, in particular, to devices for removing electrodes on contact point machines and can be used in various fields of mechanical engineering and other areas of the national economy.

State of the art

The closest to the claimed utility model in terms of technical nature and the achieved result is a device (ed. No. 1047637 ASU, published 08/23/1978) for removing contact machine electrodes, comprising a housing and a housing mounting mechanism on electrodes placed therein, an extraction mechanism electrodes with a supporting element, in which the annular horizontal and vertical cylinders, when the working medium (air) is supplied, provide a rigid fastening of the mechanism on the electrode and its subsequent removal from the electrode holder. The disadvantage of this device is its complexity and the need to supply a working medium of high pressure.

A known design of the electrode stripper on spot welding machines (RU patent No. 2095214, published November 10, 1997), in which the removal force is applied both along the longitudinal axis of the electrode being removed and in a plane perpendicular to this axis, i.e. when creating a torque. The disadvantage of this puller is the application of significant physical effort and the likelihood of defects on the conical surface of the electrode or electrode holder, which can lead to leaks in the electrode-electrode holder connection, which should be effectively cooled.

The prototype of the claimed model can serve as a device for removing electrodes (ed. No. 451508, published 02.04.1975), comprising a housing with a hole for a removable electrode and a support nut, clamping and unlocking devices installed in the housing. In this case, the clamping device is made in the form of spring-loaded crackers, provided with notches at the ends, located in the grooves of the housing and the intermediate cup, equipped with beveled surfaces interacting with the bevels of the crackers, and supported from the bottom by a clamping nut. The release device is made in the form of spring-loaded pushers.

In the device, the capture of the electrode is carried out by crackers moving due to the intermediate cup, which acts on the crackers by the beveled surfaces of their grooves, pressing them to the electrode. In the device in question, it is difficult to determine the required clamping force with the nut 2 (Fig. 1). The whole process is not visually controlled. Do not grab a short electrode and an electrode of a different diameter. In addition, the device is complex in design and unreliable in operation.

The essence of the utility model.

The objective of the utility model is to develop a device for removing electrodes of contact point machines, which would be simple in design and would be simple and reliable in operation.

In addition, the proposed device is intended for removal of electrodes on contact point machines of electrode holders. Such operations are often performed when changing electrodes in the event of its completion or replacement. Electrodes are used to compress the parts to be welded. The compression force reaches several hundred and thousands kgf. Welding current is passed through them, reaching several thousand amperes. This requires intensive cooling, so the electrodes are hollow, where coolant must circulate. When changing the electrodes, considerable efforts are made to them, which should exclude the deformation of the electrodes and the violation of the tightness of the electrode-electrode holder connection.

This object is achieved in that in the device for removing electrodes, comprising a housing with a hole for a removable electrode and a support nut, a clamping device installed in the housing and equipped with clamping elements in contact with the removable electrode, three rectangular grooves are made in one side of the housing through 120 degrees, the grooves begin from the surface of the hole for the removable electrode and end with threaded holes made in the wall of the housing along its periphery, while in each of the grooves are installed behind imnye elements formed as a bushing fixed with screws mounted in threaded holes, and the housing is provided with a removable cover.

Made in accordance with the utility model, the device has a simple design, easy to operate, does not deform the electrode, because provides reliable fixation of the electrodes due to the smooth supply of clamps to the electrode, their uniform tightening.

The list of figures in the drawings.

The utility model is illustrated by drawings, in which:

- FIG. 1 - shows a General view of a device for removing electrodes;

FIG. 2 shows a section AA of FIG. one.;

FIG. 3 shows a section BB of FIG. 2.

Implementation of a utility model.

The utility model is implemented as follows.

A device for removing electrodes, contains a housing with a hole for a removable electrode and a support nut, a clamping device installed in the housing and equipped with clamping elements in contact with the removable electrode.

Three rectangular grooves are made in one side of the housing after 120 degrees, the grooves begin from the surface of the hole for the electrode to be removed and end with threaded holes made in the wall of the housing along its periphery, while each of the grooves has clamping elements made in the form of inserts, fixed by clamping screws installed in threaded holes, and the housing is equipped with a removable cover.

An example of a specific implementation of the device for removing electrodes.

The device consists of a housing 1, in which an opening is made along the axis for a removable electrode, made with a positive tolerance on the diameter of the electrode. In the case, on one side, 3 rectangular grooves are made through 120 degrees. The grooves begin from the surface of the hole for the removable electrode and end with holes with M10 thread, made in the wall of the housing along its periphery. In each of the grooves, clamping elements are installed in the form of inserts 3, which are fixed by 3 clamping screws 5 on the M10 thread. On the working surface of the clamps facing the electrode, 0.8 mm deep notches are applied perpendicular to the axis of the electrode. At the ends of the clamping screws are mounted handles 6 for the possibility of tightening the clamps manually. In the housing, on the side opposite to the external, an internal thread is made into which the support nut 2 is installed, designed to install the device and remove the electrode from the seat of the electrode holder. On the end surface of the housing there are three threaded holes for fastening the cover 4, fixing the parts installed in the housing.

To remove the electrode, the device operates as follows. The housing 1 with a screwed nut 2 is mounted on the electrode so that the nut rests with an internal groove on the free surface of the electrode holder. Then, the compression screws move smoothly until they come into contact with the electrode and then tighten them. By rotating the nut 2 together with the housing, the electrode is removed from its seat. By unscrewing the compression screws, the electrode is released and removed from the housing.

Using the proposed device provides the following advantages:

- ease of manufacture and operation,

- does not require special skills,

- universally (possibility of application for several diameters of electrodes),

- the ability to visually control and adjust the clamping force if necessary.

Claims (1)

A device for removing electrodes on contact spot machines, comprising a housing with an axial hole for a removable electrode, a support nut and a clamping device installed in the housing, including clamping elements for contact with a removable electrode, characterized in that in the housing from the side of the hole for the removable electrode through 120 ° there are three rectangular grooves, each of which has a clamping element in the form of a liner, and three corresponding threaded holes are made in the wall of the housing, each of which is installed behind a clamping screw with the possibility of fixing the clamping element, while at the end of each clamping screw there is a handle for manually tightening the clamping element, and the support nut is made with an internal groove with the possibility of its contact with the free surface of the electrode holder.

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