DE4005996C2 - Joining process for a roller body - Google Patents

Description

The invention relates to a roller body or cylinder for rotary printing presses for the Printing industry according to the preamble of claim 1. As it is known from DE 25 42 748 A1.

Such roller bodies are generally used in printing machines as carriers of transmission materials, such as for example vulcanized rubber or plastic sheaths.

The roller bodies are in most for weight reduction Cases built in three parts. The middle part of the roll body is made tubular and leaves only the journal made of solid material, because the Roll body length usually a multiple of the roll body diameter is.

For the smooth and functional run of the finished Roll body in a printing press, after joining the Bearing journal with the tube itself is an exactly aligned overall body surrender.

Furthermore, the trunnion - pipe connections in Axis direction be designed to be tensile and compressive, as in general printing rollers heat up during operation and thus experience a change in length. Furthermore, these connections must also be torsion-proof be so that the roller runs smoothly in its storage.

It is known to weld such connections to manufacture.

In the case of the object according to DE 25 42 748 A1 there is one on the front Welded seam provided for fastening the roller tube to the bearing journal. The inside of the pipe and the Roll pin outer surface form each other facing joining surfaces. It is also form-fitting applied sleeve use made.

In the case of finished bearing journals before welding there is a risk of welding delay, which precisely aligned roller body is not possible.

In the case of post-processing of the welded roller body there are additional costs that under the Consideration of very high production quantities in particular are undesirable.

The invention has for its object the journal - Pipe connections while maintaining the required Simplify escape accuracy.  

This task is carried out with a generic roller body solved by the characterizing features of claim 1.

In the case of a higher expected load on the roller body such a connection in its operation After further training, increasing the impact of the group is necessary the invention additionally measures a press fit between trunnion and pipe as well as a superimposed one Press the pipe against the spigot in the joint guide area intended.

The advantages achieved by the invention are a significant simplification of the connection achieved and significant cost savings.

An embodiment is shown in the drawing and described in more detail below.

It shows:

Fig. 1 in a view of a roller body ( 1 ) of the outer diameter (DAR), consisting of a tube ( 2 ) and two pipe end journals ( 3 ) with the common escape axis (WKA).

Fig. 2 is a partial section of an edge region of a bearing journal ( 3 ) and the tube ( 2 ) with the forming chamber (UK) and the tube end face molding (AF) and the interference fit excess (PUM) between the pin diameter (DZ) and the tube inner diameter (DIR) before joining.

Fig. 3, the parts brought together by joining (F) pipe ( 2 ) and bearing journal ( 3 ) but without deformation of the pipe-end molding (AF).

Fig. 4 in a further step that by further joining movement (F) in the forming chambers (UK) in the direction (V1) and in the direction (V2) starting forming material of the molding (AF).

Fig. 5 shows the finished, positive connection (FSV) after completion of the joining.

Fig. 6 shows a possible arrangement for radial deformation (RV).

Claims (3)

1. roller body or cylinder for rotary printing presses, consisting of a tube and two end bearing journals, which can be joined together via at least one intended joining attachment or a joining surface, characterized in that the bearing journals ( 3 ) of the roller body ( 1 ) forming chambers (UK) and the tube end faces (RS) of the tube ( 2 ) contain formations (AF) which, after coaxial joining (F) of the tube ( 2 ) with the bearing pins ( 3 ) while deforming the material of the formations (AF) in the forming chambers (UK) together positive connection (FSV) result. 2. Roller body or cylinder for rotary printing machines according to claim 1, characterized in that there is an interference fit (PUM) between the inner tube diameter (DIR) and the journal diameter (DZ) between the journal ( 3 ) and the tube ( 2 ) in the joint guide area (FFB). 3. Roller body or cylinder for Rotary printing presses after one of claims 1 or 2, characterized in that over the pipe outer surface (RAOF) the pipe in the jointing area (FFB) radial deformation towards the roller body axis (WKA) (RV) receives.