SU914281A1 - Building material treatment apparatus - Google Patents

Description

The invention relates to the processing of non-metallic materials, namely, devices for machining holes or cutting concrete or reinforced concrete products by means of an electric arc.

A device for cutting concrete products using an electric arc discharge, containing an electric holder, conductors, movable and stationary clamps for electrodes, the movable clamp interacting with one of the ends of a hinged rod connected with an electrode holder by a spring [1}

The disadvantage of this device is that the distance between the electrodes is not regulated in the combustion process. They burn, the distance between them increases, which leads either to a cessation of combustion, or to an increase in the diameter of the hole being machined, or to an increase in the width of the cut.

2

 The closest to the present invention is a device for processing building materials, including a base with a carriage mounted on it with the possibility of translational movement, equipped with fixed and movable electrode holders [2 3.

However, the device does not provide automatic regulation of the gap between the electrodes in the combustion process, which impairs the operation of the device as a whole, and manual adjustment greatly complicates the work of the worker. When igniting the arc, it should visually monitor its occurrence, as well as monitor the preservation of the necessary gap between the electrodes in the combustion process.

The purpose of the invention is to maintain

continuous arc burning process.

To achieve this goal

in the device for processing stroi3

914281

-negative material comprising a base mounted thereon with possibility of translational movement of the carriage, provided with fixed and moving holders electro- ₅ dov.osnovanie provided with a guide and a movable electrode holder is mounted on a carriage rotatably and provided with a roller cooperating with the guide. Yu

When this guide is installed on the base with the possibility of rotation and provided with a handle and a return spring.

FIG. 1 shows the proposed 15 my device, a general view; figure 2 · the same, view in plan; in fig. 3 shows section A-A in FIG. 2; in fig. 4 shows a section BB in FIG. 2

A device for cutting products contains 20 frame G, two vertical posts 2, a base 3 and a carriage 4 on which mobile 5 and fixed 6 electrode holders 7 are mounted

The carriage 4 moves relative to the base 25 on the rollers using the handle 8. On the connection 9 of the base 3 a guide 10 is installed with the handle 11 and the return spring 12. The movable electrode holder 5 rotates on the hinge 13.

Holders 5 and 6 of the electrodes are the terminals into which the electrodes 7 are inserted and clamped ₃₅ with the help of bolts 14 and nuts 15 (FIG. 3).

The holder 5 with the help of the finger 16, the guide 17, on which is installed the sleeve 18, spring-loaded spring 19 with the adjusting nut 20. ₄₀

bracket 21 and roller 22, fixed on axis 23 by nut 24, is connected with guide 10, which causes it to turn on hinge 13 during movement of carriage 4, maintaining the set distance between electrodes 7; Motion of sleeve 18 relative to guide 17 is limited by stop 25.

The guide 10 contains a channel ⁵⁰ 26, a sleeve 27, a handle I and fixed to the connection 9 of the base 3 with the axis 28 and the nut 29 with the return spring 12 and the stop 30 of the stroke.

The sleeves 31 of roller 22 are made of ⁵⁵ electrically insulating material, preventing the electrodes from contacting with the base 3 ·

The carriage 4 consists of a frame 32, to which is attached a plate 33 of heat-resistant and electrically insulating material. The frame 32 has rollers 34 and 35 with axes 36. On these rollers the carriage rolls along the guides of the base 3.

The base 3 is a welded structure and contains two channels 37 with an angle of 38, necessary for the direction of movement of the carriage, and links 9 ·

The proposed device works as follows.

Fixing the electrodes 7 in the holders 5 and 6, move the carriage 4, determining the distance between the electrodes depending on the depth of the hole (or cut), i.e., from the stroke of the carriage 4. With large changes in this stroke move the sleeve 27 relative to the connection 9 of the base 3 and achieve the required distance between the ends of the electrodes for reliable arc burning, which would increase during the working stroke of the carriage 4.

After adjustment serves voltage to the electrodes 7.

When turning the handle 11 of the guide 10 relative to the axis 28, the roller 22 through the bracket 21 acts on the sleeve 18. But since the force of the spring 19 is greater than the friction force in the hinge 13, then the movement of the sleeve 18 relative to the finger 16 will not. In this case, the rotation of the movable holder 5 relative to the hinge 13 to the contact of the electrodes 7.

Upon further rotation of the guide 10 may break the electrodes, which prevents the spring 19, since after the closure of the electrodes, the sleeve 17 moves and the spring 19 is compressed, which then acts as a shock absorber.

I

When the handle 11 is released, the guide 10 and the movable holder 5 connected with it are returned to their original position by means of the spring 12. In this case, an arc arises between the electrodes, which is used for cutting (drilling). The handle 8 moves the carriage 4 and the electrodes 7 inside the melted hole to the desired depth.

At the end of the cutting process turn off the power and the carriage 4 is returned to its original position.

6

five

Thus, the proposed device allows to automate both the process of ignition of the electric arc before the start of cutting, and the process of maintaining the necessary clearance between the working ends of the electrodes in the combustion process.

Claims (2)

Claim 1. A device for processing construction materials, including a base with a carriage mounted on it with the possibility of translational movement, equipped with fixed and movable electrode holders, characterized by 914281 that, in order to maintain a continuous process of arcing, the base is provided with a guide, and the movable holder of the electric unit is mounted on the carriage so that it can be rotated and equipped with a roller interacting with the guide. 2. The device according to claim 1, of tl and h, based on the fact that the guide θ θ is installed on the base so as to be rotatable and provided with a handle and a return spring.