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Wear material for shaft/hub regions and method for applying said wear material

A hub, zone technique applied in polymer chemistry to address problems of too little or no attention

Inactive Publication Date: 2017-05-10
LEIBNIZ INST FUR POLYMERFORSCHUNG DRESDEN EV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the formation of localized cells, which is well known, but often too little or no attention is paid in practice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0069] According to Comparative Example 1, the car was equipped with winter tires in October, but a polyimide film (thickness 25.4 μm, 100HN, Krempel Group), which previously matched the contact surfaces accordingly to the recesses for the bolts. The contact surfaces of the rim and hub have been previously cleaned of adhering dirt.

[0070] After a similar mileage according to Comparative Example 1, the wheels were replaced with summer tires at the end of April. All wheels separated easily and without problems from the hub and it was determined that neither the contact surfaces were corroded nor the rim and hub were corroded.

example 2

[0072] Similar to Example 1, the following films were arranged in the cleaned contact area of ​​the rim and hub:

[0073] a) PTFE-cut film (thickness 0.1mm, PTFE Nünchritz company)

[0074] b) ETFE-film (thickness 25 μm, NOWOFLON ET, Nowofol company)

[0075] c) PC / PBT-film (PC-film on the rim, PBT-film on the hub, Thickness 175μm each, Bayer company)

[0076] d) PE-film (thickness 125μm, ThyssenKrupp Plastics).

[0077] After a similar mileage according to Example 1, all wheels can be easily and without problems separated from the hubs when changing wheels in all cases with all membranes from a) to d) and it has been established that neither Corrosion of the contact surfaces did not cause corrosion and agglomeration of the rim and hub.

example 3

[0079] Corresponding to comparative example 1, on the cleaned contact area of ​​the rim (in the contact area of ​​rim and hub), a one-sided etched PTFE film was arranged on the rim by means of a thermosetting epoxy resin and bonded under pressure at 160° C. , the film has a thickness of 0.1 mm (PTFE Nünchritz company) and the contact surface was previously adapted accordingly to the recess for the screw. The bonding of the correspondingly matched / cut PTFE film is carried out in such a way that the PTFE film is applied to the etched side previously coated with a thin layer of epoxy resin and thermally bonded under pressure. After bonding and before joining the rim and hub by screwing, the interface of the rim to be bonded with the PTFE film and the hub is cleaned to remove adhering dust / dirt. The rim is fixed to the hub through a threaded connection.

[0080] After a similar mileage according to Comparative Example 1, the wheels were replaced with summer tires at the end of Ap...

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Abstract

The invention applies to the field of polymer chemistry and relates to a wear material that can be used in the region of the contact surfaces between a shaft and a hub. The aim of the present invention is to specify a wear material for shaft / hub regions, in the case of which shaft / hub regions corrosion and corrosion-caused binding of the shaft / hub materials are largely prevented. The aim is achieved by means of a wear material consisting of at least one plastic layer, which is arranged on the contact surfaces of the shaft and of the hub, wherein the plastic realizes at least a partial electrochemical isolation and separation between the materials of the shaft and of the hub. The aim is also achieved by means of a method, in which a plastic is applied at least to parts of the contact surfaces of the shaft and / or of the hub in the form of a film or in the form of a solution, with subsequent drying to form a layer, or in the form of a coating material that is coated or impregnated with the plastic and that is cured / cross-linked.

Description

technical field [0001] The invention relates to the field of polymer chemistry and to wear materials for the shaft-hub area, in particular the rim-hub area of ​​a wheel, and methods for their application, which wear material can be used in machine or vehicle construction, for example for wheels In the area of ​​the contact surface between the shaft or rim and hub. Background technique [0002] In machine building and especially in the KFZ (motor vehicle) field, for wheel mounting, the rim and the hub (often also called the shaft-hub area and specifically for the KFZ area as the rim-hub area) are screwed or connected to each other by The same or different materials, such as steel rims and steel hubs or light metal rims / aluminum rims and steel hubs or carbon fiber composite rims and steel hubs. In the case of all the aforementioned pairs of materials, for example during driving in winter through environmental influences, such as through the action of moisture or especially th...

Claims

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Application Information

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IPC IPC(8): B32B7/12B32B9/02B32B9/04B32B15/082B32B15/085B32B15/14B32B27/20B32B33/00B32B37/06B32B37/12
CPCB32B7/12B32B9/02B32B9/041B32B15/082B32B15/085B32B15/14B32B27/20B32B33/00B32B37/06B32B37/12B32B2262/062B32B2260/021B32B2260/046B32B2307/752B32B2307/554B32B2605/08H01B3/00B32B27/00
Inventor D·莱曼
Owner LEIBNIZ INST FUR POLYMERFORSCHUNG DRESDEN EV
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