EP1375748B1 - Tamping tool and method for its manufacture - Google Patents

Description

The invention relates to a method for producing a stuffing plug for the clogging of a track.

By US-A-2002/0051682 It is known to connect a pick plate formed of wear-resistant metal by a plug connection with a picking shaft. To secure the connection, a weld can be applied. To improve wear resistance, additional coatings can be applied to the pick plate.

According to US 4,996,925 is a tamping pick with a aufsteckbaren on a Pickelschaft and a pick plate forming plate shell known. A corresponding connection between the disk casing and the picking shaft is achieved by compression of an intermediate layer. Such a solution has the disadvantage that the connection between the picking shaft and the disk casing is dependent exclusively on the compression forces.

The object of the present invention is now to provide a method of the generic type, which allows for high abrasion resistance, a more durable use of a stuffed pot.

According to the invention this object is achieved by a method of the type mentioned by the features cited in the characterizing part of claim.

This method has the particular advantage that the tamping picket has both a high strength and an optimum abrasion resistance. In addition, the disk shell can be poured in an advantageous manner while avoiding shock-sensitive mass concentrations in a uniform thickness. At renewal a become useless after a long use pimple plate results in a further advantage in that the entire pimple plate along the weld can be separated from the Pickelschaft and thus it is reusable after welding a new Pickelplatte.

Further advantages and embodiments of the invention will become apparent from the drawing.

In the following the invention will be described in more detail with reference to embodiments shown in the drawing.

Fig. 1

eine schematische Seitenansicht einer Stopfmaschine mit einem Stopfpickel aufweisenden Stopfaggregat,

Fig. 2,

3 eine Rück- bzw. Seitenansicht eines unteren Abschnittes eines Stopfpickels,

Fig. 4

eine Ansicht des Stopfpickels mit einer von einem Pickelschaft getren ten Pickelplatte, und

Fig. 5

eine weitere Variante einer Pickelplatte.

Show it:

Fig. 1

a schematic side view of a tamping machine with a stuffing tamping tamping unit,

2,

3 is a rear or side view of a lower portion of a stuffing peg,

Fig. 4

a view of the stuffing with a Pickelschaft trimmed th pimple plate, and

Fig. 5

another variant of a pimple plate.

An in Fig. 1 apparent tamping machine 1 is equipped between chassis 2 with a height-adjustable tamping unit 3. This has tamping 4 to the clogging of a track 5.

As from the others FIGS. 2 to 4 Recognizable, the tamping pick 4 has a picking plate 6 which is connected to a lower end 7 of a picking shaft 8. In order to increase the abrasion resistance of the picking plate 6, this is composed of a plate shell 9 and a cast-in this core mass 10 whose welding characteristic corresponds to that of the pickle shaft 8.

An opening 11 of the plate casing 9 has on a rear side 12 of the stuffing pick 4 a recess 14 leading towards a pick lower edge 13. The lower End 7 of the pick-up shaft 8 is formed in the same direction with respect to the recess 14 or a contact surface 15 formed by the core material 10 and has a contact surface 16.

To produce the stuffing pick 4, the plate casing 9 is first cast from wear-resistant steel. Thereafter, the plate shell 9 is filled to form the opening 11 closing the contact surface 15 with the core mass 10 (s. Fig. 4 ). The picking plate 6 is pushed onto the lower end 7 of the picking shaft 8 such that the two contact surfaces 15, 16 come to lie directly adjacent to one another. Subsequently, an edge zone 17 of the contact surface 15 is welded to an edge zone 18 of the contact surface 16 of the pickle shaft 8 to form a weld seam 19.

At an in Fig. 5 apparent variant of the picking plate 6, the opening 11 is limited to one of the Pickelunterkante 13 opposite upper edge 20 of the disk casing 9 and circular. From this opening 11 protrudes a shaft stub 21 of the cast in the plate shell 9 core mass 10 out. The shaft stub 21 is welded to form the stuffing plug 4 with a cross-sectionally similar (not shown) lower end of the pickle shaft 8.

Claims (1)

1. A method of producing a tamping tine (4) for tamping a track, characterized by the following method steps:

   a) casting a pad casing (9) of wear-resistant steel, having an opening (11),

   b) filling up the pad casing (9) with a core matter (10), thus closing the opening (11) by forming a contact surface (15), and

   c) welding a rim zone (17) of the core matter (10) to a rim zone (18) of a tine shank (8).

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