RU49482U1 - INSTALLATION FOR AUTOMATIC SURFACE UNDER A FLUX LAYER - Google Patents

Abstract

The utility model relates to railway transport and can be used to restore or harden by surfacing a worn surface of hull parts such as hulls of axleboxes of railway freight cars. The essence of the metro: the support for fixing the surfaced part is made in the form of a power spacer installed in the cavity of the part, including a spindle connected by opposed articulated link links with expandable shoes for interacting with the surfaced part.

Description

The utility model relates to railway transport and can be used to restore or harden by surfacing a worn surface of hull parts such as hulls of axleboxes of railway freight cars.

A known installation for automatic arc surfacing under a flux layer containing a forming device of high thermal conductivity in the form of a removable copper water-cooled mold-mold with an internal hole having the configuration of the working part of the deposited product (see, for example, the description of the invention to the USSR copyright certificate No. 1776511, class. B 23 K 9/04, 1992).

A disadvantage of the known device is that it is practically not intended for surfacing large surfaces with uneven wear.

The closest known for its technical essence and the achieved effect is the installation selected for the prototype automatic arc surfacing under the flux layer, containing a support for fixing mounted with the possibility of rotation of the surfaced part, a vertical column with a surfacing tool, including a surfacing head with a mechanism for moving it, a flux hopper and an electrode wire coil with a mechanism for feeding it into the surfacing zone (see, for example, RF patent for PM No. 34431, class B 23 P 6/00, publ. 10.12.2003).

The essence of the claimed utility model is expressed in the aggregate of essential features sufficient to achieve the technical result provided by the proposed utility model.

The technical result from the use of the claimed technical solution is to reduce processing time by eliminating deformation of the axle box body during surfacing and

the expansion of technological capabilities by providing the possibility of electric arc welding of the worn side surface of the guides of the maxillary opening and the supporting surface of the axle box body taking into account the machining allowance.

The specified technical result is achieved by the fact that in the installation for automatic arc surfacing under the flux layer, containing a support for fixing the rotary part to be mounted rotatably, a vertical column with surfacing equipment, including a surfacing head with its movement mechanism, a flux hopper and an electrode wire coil with by the mechanism of its supply to the surfacing zone, the support for fixing the surfaced part is made in the form of a power spacer installed in the cavity of the part, including a spindle associated oppositely arranged Toggle links Lug shoes to communicate with the fusing part.

Comparison of the claimed technical solution with the prototype made it possible to establish compliance with its criterion of "novelty", since it is not known from the prior art.

The proposed device is industrially applicable, since it can be implemented by existing technical means.

Thus, the proposed technical solution meets the established conditions of patentability of a utility model.

The other known technical solutions for a similar purpose with similar significant features by the applicant was not found.

Figure 1 shows the axle box body with a worn supporting surface A and guide surfaces B of the maxillary opening, figure 2 is a diagram of the axle box loading before surfacing, in Fig. 3 is a power spacer mechanism, in Fig. 4 is the same top view , Fig.5 is a diagram of a deposition of guides of the intermaxillary opening.

Installation for automatic surfacing under the flux layer contains a support for fixing the installed with the possibility of rotation of the surfaced parts, a vertical column

with surfacing equipment, including a surfacing head with a mechanism for moving it, a hopper for flux and a coil of electrode wire with a mechanism for feeding it into the surfacing zone.

Surfacing equipment is completely identical to the previously described similar equipment known from the prototype of the applicant - RF patent for PM No. 34431, class. In 23 P 6/00, publ. 10.12.2003.

The support for fixing the surfaced part is made in the form of a power spacer installed in the cavity of the part, including a spindle 1 connected by opposed articulated link links 2 with expanding shoes 3 for interacting with the surfaced part 4.

The operation of the device is as follows.

The restored axle box body is connected to a voltage source of reverse polarity, connecting the minus terminal to the axle box body, and put on a power spacer mechanism, with which the axle box body is elastically deformed before surfacing. When the guides of the axle box body are surfaced in a free state, the diameter of the bore hole in the planes of the front and rear thrust bearings decreases by an average of 0.2 mm in the direction of the jaws, and increases accordingly in the direction of the bearing surface, respectively. In order to avoid this, a spacer force is applied along the jaws, which causes an increase in diameter in this direction. Experiments have shown that the axle box body must be deformed by at least 0.4 mm, for which an internal tensile force of the order of 10 tons is applied. In order to avoid time-consuming measurements of the axle box inner diameter, control is carried out by the thickness of the asbestos gasket 5 placed between the expandable shoes and the weld detail.

Surfacing of the guides of the axle box body is carried out in reduced modes. This makes it possible, while maintaining stable arc burning and process performance, to obtain a minimum metal heating zone and, therefore, a minimum plastic zone

deformations. When surfacing, the application of welds is carried out along the guides in the loaded state along the diagonals with forging with a hammer or pneumatic tool for each welded joint, subsequent exposure and intermediate natural cooling in the loaded state for at least 30 minutes to relax residual stresses, which helps to reduce the heating of the base metal and favors reduce residual deformation of the axle box body. After surfacing of the guide jaws, the axle box body is removed from the spacer power mechanism, cooled in the free state, and then the supporting surface is fused also taking into account the machining allowance.

Testing of the claimed device was carried out on the Southeastern Railway and showed positive results.

Thus, the use of the proposed device reduces the processing time by eliminating deformation of the axle box body during surfacing and expanding technological capabilities by providing the possibility of electric arc surfacing of the worn side surface of the guides of the intermaxillary opening and the bearing surface of the axle box body with allowance for machining, while the restoration of worn axle box housings provides an increase in the resource of their work and cost savings on the purchase of out

Claims (1)

Installation for automatic surfacing under a flux layer, containing a support for fixing a rotatable surfaced part, a vertical column with surfacing equipment, including a surfacing head with a mechanism for moving it, a flux hopper and an electrode wire coil with a mechanism for feeding it to the surfacing zone, characterized in that the support for fixing the surfaced part is made in the form of a power spacer installed in the cavity of the part, including a spindle connected oppositely located laid down articulated-lever links with expandable shoes for interaction with the weld-in part.