CZ278919B6 - General-purpose machine tool - Google Patents

Abstract

The aim of the sublevel machine-tool used for more purposes is to provide lathe-turning operation of the transversal profiles closed to wheel-sets (8) of the rail vehicles tied up not tied up of the chassis. On the stand (1),there is standing at least one couple of the co-axial spindles (2), being able to approach to each other. Their clams (4) are prepared on the outer surface (41) sot hat, the tyre or the mono block of the wheel-sets (8) could be fixed after the internal shoulder. On the stand (1), there is placed one pair of the knife supports (5).

Description

Technical field

The invention solves a multi-purpose underfloor machine tool for turning the running profiles of wheelsets of rail vehicles not tied or unloaded from the bogie.

BACKGROUND OF THE INVENTION

Underground machine tools for grinding and turning are used for machining of wheelset driving profiles. Grinding underfloor machine tools use traction motors to rotate axles because the cutting resistance during grinding is low, resulting in a lengthy operation. Due to the design of the continuous dressing wheel, the wheel can only machine the tread surface of the wheel. The outer side surface of the flange remains unworked, which is insufficient for tram wheels due to the profile shape of the rail used. If the machining of the wheelsets is carried out by turning, it is also necessary to set the wheelsets on the wheels as in the case of grinding, but these are driven. If a tied axle is being machined, the adhesion of the traction vehicle mass is replaced by additional downforce. In the case of wheelsets with bearings between axles, the contact force is applied over the spikes in the wheel axles and, in the case of wheelsets with bearings outside the axles, a thrust on the bearing houses. This solution is only suitable for wheelsets with fixed monoblocks. Such a solution is unsuitable for wheelsets with built-in rubber-metal elements in wheels, because the additional pressure causes undesirable deformation of the rubber-metal elements with permanent destructive effect.

SUMMARY OF THE INVENTION

The above-mentioned drawbacks are solved by an underfloor machine tool according to the invention, on whose stand a pair of headstocks and a pair of knife supports are arranged. The essence of the solution consists in that at least one pair of coaxial headstocks mutually approachable to each other is arranged on the rack. The headstock jaws are the outer surface intended for gripping the rim or monoblock of the wheelset behind the inner shoulder. A pair of knife supports are arranged on the stand below. Such a solution enables precise machining of the wheelset even with built-in rubber-metal elements. The wheelset is held by the jaws in the immediate vicinity of the work surface and no undesirable deformation of the rubber-metal elements occurs. If the inner surface of the jaws forms an acute angle with the outer surface of the jaws, then the wedge of the jaws will facilitate gripping the wheelset under permanent deformation of the rubber-metal element in the unloaded state, where the front cover of the wheel makes it difficult to grip. It is also advantageous if the headstock is mounted on the portal and its columns are adjustable in height. For transmitting the torque from the headstock to the machined wheelset, it is advantageous if at least one headstock is provided with a knife carrier. Depending on the overall solution, the knife supports can then be extended laterally or vertically.

Overview of the drawings

An overall view of the multipurpose machine tool according to the invention in a schematic embodiment is shown in the attached drawing, where

FIG. 1 is an elevationally extending support and FIG. 2 is a laterally extending support, the side view of which is also shown in FIG. 3. A detailed cross-sectional view of a wheel with a collar clamped in the clamping head is shown in FIG. while the monoblock wheel is shown in Fig. 5.

DETAILED DESCRIPTION OF THE INVENTION

At least one pair of coaxial headstocks 2 are aligned on the stand 1. The stand 1 may consist of individual parts interconnected by a rigid base, or it may be monolithic. Each of the second headstocks ^e j provided with a gripping head 3 equipped with clamping jaws 4 which are on the outer surface 41 adapted to retain solid or monobloc wheels 8. In the inner recess. A pair of knife supports 5 are arranged on the stand 1. The knife supports 5 may be extendable laterally or heightwise. To facilitate gripping of the wheelset 8, it is suitable that the inner surface 42 of the jaws 4 form an acute angle with the outer surface 41. In the embodiment shown in Figures 2 and 3, the headstock 2 is seated on a portal 2 mounted on a stand

1. According to this embodiment, the headstock 2 can be height-adjusted together with the cross beam 61 on the columns 62 for greater adaptability to the different wheel diameters of the wheelset 8. Advantageously, at least one of the headstocks 2 is provided with a front knife carrier 7.

When turning the coupled wheelset, the wheelset is clamped by jaws 4, the outer surfaces 41 of which are shaped to clamp the tire or the monoblock behind the inner shoulder. If the wheelset 8 is equipped with a rubber-metal suspension in the wheel which is covered by the front cover, then the inner surface 42 making an acute angle with the outer surface 41 facilitates the push-off of the front cover and the outer surface 41 more readily adjacent In order to increase the effect of torque transmission, it is advisable to use a solution 7 with a front gripper 7, which also ensures the transmission of torque from the headstock 2 to the wheelset 13. When turning unbalanced wheelset 8 it is advisable to eliminate , or by lifting the traction vehicle with a crane and placing it on the ground. Thus, the headstocks 2 are not subject to an undesired force effect, and the machining is then close to the machining of the unloaded wheelset JB. The knife supports 5 can then process both the driving profile and the flange on the outer side of the wheel, when solving both lateral extendability and height extendability. If the wheelset 8 is free of the tire, it is also possible to machine its cylindrical surfaces for subsequent pressing of the tire.

Claims (7)

PATENT CLAIMS A multipurpose sublevel machine tool for turning rails of rolling stock not tied or unloaded from a bogie, comprising a headstock with a headstock and a pair of knife supports, characterized in that at least one pair of coaxial headstocks (2) is aligned on the rack (1). , mutually approachable and with jaws (4) with an outer surface (41) for gripping the rim or monoblock of the wheelset behind the inner shoulder, a pair of knife supports (5) is arranged in the lower part of the stand (1). The multi-purpose underfloor machine tool according to claim 1, characterized in that the inner surface (42) of the jaws (4) forms an acute angle with the outer surface (41). The multi-purpose underground machine tool according to claims 1 and 2, characterized in that the headstock (2) is seated on the stand (1) on the portal (6). The multi-purpose underfloor machine tool according to claim 3, characterized in that the portal (6) comprises a cross beam (61) which is height-adjustable on the columns (62). Multifunctional underfloor machine tool according to claims 1 to 4, characterized in that at least one of the pair of headstocks (2) is provided with a front knife carrier (7). The multi-purpose underfloor machine tool according to claims 1 to 5, characterized in that the knife supports (5) are extendable laterally. The multi-purpose underfloor machine tool according to claims 1 to 5, characterized in that the knife supports (5) are extendable in height.