JP2007502370A - Manufacturing method of slide bearing bush - Google Patents

Abstract

  The present invention relates to a method for manufacturing a flat bearing bush comprising a plastic sliding layer and a metal sheath used as a support and provided with an anticorrosion protection layer on the outside. In order to form the anti-corrosion layer, the anti-corrosion agent is mechanically applied in powder form. The flat bearing bush produced by the method of the present invention has improved sliding properties and a long useful life.

Description

Detailed Description of the Invention

  The present invention relates to a method of manufacturing a slide bearing bush having a metal jacket as a support and a plastic slide layer, which is provided with a corrosion-resistant layer on the outside. The present invention further relates to a slide bearing bush manufactured by the above method.

  The slide bearing bushes of the type described in the preamble of the claims are generally known and in particular are widely used for the most widely different types of hinges and bearings in the automotive industry sector. The operation of the slide bearing bush is maintenance-free, ie there is no need to lubricate the bearing. Mounting the slide bearing bush into the corresponding hinge and bearing is usually performed by press-fitting the slide bearing bush using a suitable tool. Therefore, the slide bearing bush is also indicated as a press-fit maintenance-free slide bearing bush.

  Examples of known press-fit slide bearing bushes are described in particular in the published specifications DE 3534242, EP 0217462 and WO 90 / 12965A1. The bushing typically has a metal casing (jacket) with a fluoropolymer compound-based plastic slide layer (“running layer”) on its inner surface (eg, PTFE with glass fiber-graphite filler). Depending on the running properties required, the plastic slide layer further includes a tin / bronze wire mesh or expanded metal rib mesh as a reinforcing material embedded in the fluoropolymer formulation. Further, a honeycomb cutout is provided as a plastic slide layer on a surface-structured metal sheet, a fluoropolymer compound is attached to the surface of the metal sheet with an adhesive, and the honeycomb cutout is filled Such a method is also known from WO 99/05425 A1, for example. The metal jacket and the plastic slide layer in the described slide bearing bush are usually joined together by a hot melt adhesive film (eg PFA, ETFE).

  In order to provide protection against corrosion, it is also common to provide corrosion protection layers made of zinc or zinc / nickel, tin, zinc-aluminum, and possibly chromium, on the outside and on the surface of the metal jacket of the slide bearing bush. Is. During the manufacture of the known slide bearing bush, the application of the zinc or zinc / nickel layer is carried out by galvanization, ie leading to a slide bearing bush finished in a zinc or zinc / nickel plating bath, in this bath A zinc or zinc / nickel corrosion resistant layer is deposited by electrolytic means.

  Studies in the field of the present invention have shown that during the galvanization of the slide bearing bush, zinc deposits occur on the running layer in the flange area, which adversely affects the bushing slide properties. During the molding of the flange, microcracks are created in the plastic running layer from which the electrolyte penetrates to the metal reinforcement material (eg bronze fabric), thus allowing the electrolytic deposition of zinc. It has been found that zinc deposition has a detrimental effect on the initial slide characteristics of a slide bearing, despite its small volume in the microgram range. In particular, zinc deposition has been found to cause an increase in the coefficient of friction and a decrease in load bearing capacity and wear resistance in the run-in phase of the slide bearing bush. This increased friction has an adverse effect on the useful life of the slide bearing.

  A further disadvantage associated with the galvanization of slide bearing bushes is that the arcing often causes damage to individual bushes, resulting in a relatively high loss rate associated with defective bushings. This arcing is due to incomplete electrical contact of the polymer-coated bush and the associated local electric field concentration during electrolysis.

  Further known from DIN ISO standard 12683 is a method of mechanically plating a metal member, ie a method of applying a zinc coating applied to the metal member using a suitable drum device. This method is substantially based on a method in which small glass balls of various sizes in the drum are pressed into the surface of the member to be plated with zinc powder particles. Also called (ball-plating). According to this method, neither current nor heating is required.

  The object of the present invention is to provide a method of manufacturing a slide bearing bush of the type described in the preamble of the present specification, which has excellent sliding properties and very good corrosion resistance. In particular, the application of the corrosion resistant layer should not impair the function and useful life of the bush.

  An object of the present invention includes, according to the present invention, a metal jacket as a support on which a corrosion-resistant layer is provided and a plastic slide layer. This is achieved by a method of manufacturing a slide bearing bush applied on the jacket.

  In contrast to known production methods with electrolytic application of a corrosion-resistant layer (for example by galvanization), according to the method of the invention, the application of the corrosion-resistant agent is in mechanical means, for example in the surface of a metal jacket. It is carried out by press-fitting into.

  Surprisingly, it has been found that the mechanical application of the corrosion resistant layer by mechanical means results in an increased useful life of the slide bearing bush and improved sliding properties compared to conventional galvanizing methods. In particular, it has been found that in the case of mechanical application of corrosion resistance, no zinc deposits are formed in the flange region of the running layer, in contrast to the galvanizing process. Even with the method according to the present invention, the flange area of the bush is in direct contact with the zinc powder (or other metal powder), so that the method according to the present invention reduces the occurrence of zinc deposits in the flange area. The fact that it can be avoided was particularly surprising. However, this contact surprisingly does not lead to long-term zinc deposition in the mentioned areas. The undesired increase in coefficient of friction and reduction in load bearing capacity and wear resistance that occur when running a galvanized slide bearing bush in a conventional manner do not occur with the method according to the invention. The slide bearing bush produced using the method according to the invention has a long useful life compared to a normal galvanized slide bearing bush.

  In addition to this, the slide bearing bush produced using the method according to the invention has better adhesion between the metal jacket and the plastic slide layer than the galvanized bush. There is no peeling of the plastic slide layer, especially in the flange region where there is a tendency to peel. The method according to the invention is gentle compared to the normal galvanizing method and has a low loss rate during production because of less damage to the bush.

  The features of the dependent claims relate to advantageous further embodiments of the method according to the invention.

  The method according to the invention is suitable for the production of all kinds of slide bearing bushes and is not limited to a specific slide bearing bush. The only essential element is that the slide bearing bush exhibits a bond between the metal jacket and the plastic slide layer. Typically, a slide bearing bush has an open hollow cylinder on its front faces, which has a metal jacket on its outside and a plastic slide layer on its inside. The slide bearing bush can have a flange on at least one of its surface surfaces that allows a simple press fit of the bush into the hinge or bearing. In particular, the method according to the invention is suitable for the production of maintenance-free slide bearings.

  The metal jacket of the slide bearing bush can be made of any desired metal and alloy. In particular, suitable metals are steel, stainless steel, aluminum, bronze, brass, titanium and / or copper and alloys of these metals.

  The plastic slide layer of the slide bearing bush includes a plastic slide bearing material. Plastics suitable for this purpose usually have high mechanical load carrying capacity and / or high heat resistance in addition to good sliding properties. Suitable plastics are, for example, fluoropolymer-based plastics, in particular polytetrafluoroethylene (PTFE), polyfluoroalkoxyalkenes (PFA, MFA), and / or tetrafluoroethylene-hexafluoropropylene (FEP), And non-fluorinated polymers such as, in particular, polyether-ether ketone (PEEK) or polyethylene (PE), and in particular high molecular weight polyethylene (HMW-PE) and / or ultra high molecular weight polyethylene (UHMW-PE) is there.

  In order to improve load bearing capacity and reduce wear, cold flow, and static friction, the plastic slide layer may include organic and / or inorganic fillers (“formulations”). Preferred filling formulations include glass fiber, carbon, graphite, and / or aromatic polyester. Particularly suitable are fluoropolymer / glass fiber / graphite blends, fluoropolymer / carbon / graphite blends, and fluoropolymer / aromatic polyester blends.

  The plastic slide layer of the slide bearing bush may further include a reinforcing metallic member, which is a reinforcing material having an open structure, woven fabric, in particular, a wire mesh, an expanded metal rib mesh. , Non-woven fleece materials, in particular metal fleeces, metal foams, porous metal layers, and / or perforated discs. In the case of a porous metal layer (especially a porous bronze layer), preferably this porous metal layer is sintered onto a metal jacket. The metallic member can be composed of any desired metal or alloy. Preferably, the metallic member is made of a material selected from bronze, copper, chromium, nickel, zinc, zinc-iron alloy, zinc-nickel alloy, aluminum, tin bronze, steel, stainless steel, and alloys thereof. .

  The plastic slide layer of the slide bearing bush is bonded internally to the metal jacket and forms a composite material. Preferably, the plastic slide layer is bonded to the metal jacket, in particular by a hot melt adhesive film of ethylene tetrafluoroethylene copolymer (ETFE) and / or perfluoroalkoxy copolymer (PFA). However, for example, by sintering or welding, the metal case and the metal member of the plastic slide layer (eg, wire mesh or expanded metal rib mesh) are metallically bonded to each other and then the slide The material can also be introduced into the metal member. With this type of metal bond, it is not necessary to use a melt adhesive to bond the metal jacket and the plastic slide layer.

  The mechanical plating method for applying the corrosion-resistant layer used in the method according to the invention is described in more detail below.

  The method according to the invention is characterized by mechanically applying a powdered anticorrosive agent on the metal jacket of the slide bearing bush in order to form an anticorrosion layer. The method of mechanical application is also indicated as plating.

  Any desired material can be considered as an anti-corrosion agent that is suitable as a surface coating to reduce the tendency of the material to corrode. The corrosion resistant material is preferably a ductile material, in particular a ductile metal that can be pressed into the surface of the metal jacket during plating. Particularly suitable as corrosion inhibitors are metal powders, in particular zinc, tin, aluminum, cadmium, and / or alloys thereof. However, non-metallic anticorrosives such as certain ductile polymers can also be envisaged. According to a particularly preferred embodiment of the invention, zinc is used, in particular in the form of zinc powder, as a corrosion-resistant agent.

  The anticorrosive is present in powder form. The term “powder” in the sense of the present invention is to be understood as meaning particles having an average particle size of 20 mm to 1 μm. The smaller the average particle size of the powder used, the easier the application. Advantageously, this diameter is in the range from 1 μm to 1 mm, and more preferably from 1 to 10 μm, and in particular from 3 to 8 μm.

  The mechanical application of the anticorrosive is preferably carried out by press fitting into the surface of the metal jacket. This can be done, for example, by rolling the slide bearing bush in a mixture of powdered anticorrosive and hard material bodies. In this situation, during the rotation of the mixture, the hard material object presses the particles of the anticorrosive into the surface of the metal jacket of the slide bearing bush.

  As the hard material object, preferably a spherical hard material object, for example a glass ball, is used. The hard material object preferably has an average particle size of 0.1 to 10 mm, in particular 0.4 to 1.2 mm. The size of the hard material object used will affect the speed and particle size of the resulting coating. Large objects having a particle size of 3-10 mm have a high impact effect that leads to a more rapid plating process. In contrast, the advantage of using small objects having an average particle size of 0.1-0.5 mm is that the small objects are formed from a coating material under process conditions and are undesirably coarse coated surfaces Lies in the fact of destroying the aggregates that cause the. Thus, the use of small objects actually leads to a slow coating process, but the end result is a fine-grained coating.

  Mixtures of these can also be used to combine the advantages of large and small hard material objects. When a mixing ratio of an object having a particle size of 3 to 10 mm to an object having an average particle size of 0.1 to 0.5 mm is 10:90 to 50: 50% by volume, particularly 20:80 to 30: 70% by volume, a slide bearing is used. Coatings having surface and corrosion resistance properties that are particularly advantageous for use with bushings can be obtained. Preferably, glass balls of various sizes are used at the indicated mixing ratio.

  As the material for the hard material object, any material is suitable as long as its hardness is higher than the hardness of the particles of the corrosion-resistant material. According to a preferred embodiment of the present invention, the glass balls are simple and economical, can be used in various sizes, are harmless, chemically inert, non-absorbable, wear resistant Glass balls are used as hard material objects because they are abradable and can be reused and have a low coefficient of friction and high impact resistance.

  According to a preferred embodiment of the present invention, the hard material object and the slide bearing bushing are present as a mixture of approximately equal volume parts. However, it is also possible to choose a higher or lower proportion of the hard material object. A high proportion of hard material objects is advantageous, especially for heavy slide bearing bushing coatings or where a thick layer is desired. Typically, the volume ratio of the hard material object to the slide bearing bush in the method according to the invention is about 0.3 to about 3.

  The process according to the invention is carried out in a rotating drum in which the mixture is filled and in which the mixture is rotated. In order to improve the rotation of the mixture in the drum, the drum preferably has a corner arrangement on its inside. A further improvement to the rotation process can be achieved by providing the drum with a floor and decreasing the drum cross section towards that floor. In addition, the drum is preferably resistant to the materials used. Thus, preferably a stainless steel drum is used, which can be further coated with acid and wear resistant plastics or rubber.

  According to another preferred embodiment of the invention, the mixture also contains a fluid, in particular water, in addition to the anticorrosive and the slide bearing bush. In particular, when metal powders, such as zinc powder, are to be used as anticorrosives, it is advantageous to add water to the mixture and adjust the aqueous phase of the mixture to a pH value of 0 to 7, in particular 1 to 3. I understood.

  The pH value can be adjusted by adding an acid. In acidic medium, the surface of the metal jacket of the slide bearing bush is etched and consequently activated. The higher the pH value, the slower the coating process generally takes place. Accordingly, the pH value is preferably 0 to 7, preferably 1 to 3, and more preferably 1.7 to 2.5. The pH value is adjusted by adding an acid. The acid involved is preferably a non-oxidizing acid.

  The volume ratio of hard material object and slide bearing bush to fluid is preferably approximately 2: 1. In this connection, it is advantageous to adjust the fluid volume so that the fluid volume remains just above the solid component part of the mixture during the rotation of the drum.

  In addition to the aforementioned components, conventional additives such as activators, accelerators, defoaming means, and metal salts can also be added to the mixture. The addition of this type of additive is generally common and is generally known to those skilled in the art from the literature on mechanical galvanization.

  Good results can be achieved as well when the temperature of the mixture is between 5 and 40 ° C., and in particular between 21 and 26 ° C. If the operation is to be carried out at high temperatures, a rapid coating process can be achieved, but this tends to lead to a somewhat coarser surface. In contrast, at lower temperatures, the coating takes place more slowly, thereby forming a more uniform surface.

  Prior to the plating process, it is advantageous to first thoroughly clean and degrease the slide bearing bush. Degreasing can be carried out in any desired manner and in particular a hot alkaline soap solution is suitable as the grease solution. The defatted bush can then be immersed in an acid bath and then rinsed with water.

  According to a preferred embodiment of the invention, a further surface treatment step is carried out after the coating process. Thus, for example, after mechanical plating, the slide bearing bush can be chromated and / or sealed in a conventional manner. As the chromate treatment, a yellow chromating method (Cr-VI) or a blue chromate treatment (Cr-III) can be considered. For the sealing, in particular, sealing using a silicate sealer can be considered.

  A possible sequence of the method according to the invention is described below by way of example.

  The slide bearing bush to be coated is filled into a drum in a mixture of hard material objects (eg glass balls) and water, if appropriate after preliminary cleaning.

  In addition, an activator, such as a glycol ether, such as nonylphenol glycol ether, can be added to the mixture. Preferably, the activator can be added to the mixture in acidic solution, especially in dilute sulfuric acid.

  All elements are mixed together (about 2 minutes) by a short rotation of the drum.

  To make the coating primer, a metal salt, in particular a copper salt, for example copper sulfate, can be added to the mixture as the next step in the process. In addition, accelerators such as tin salts, in particular tin sulfate, can also be added to the mixture as reaction accelerators. Preferably, the accelerator is added to the mixture in an acidic solution, in particular in a mixture of dilute sulfuric acid and hydrochloric acid. The accelerator solution can further contain tensides and / or organic salts as additives. In addition, conventional defoaming means can also be added to the reaction mixture. These elements are similarly mixed with the other ingredients by a short drum rotation (4-8 minutes).

  To form the basis of the coating, a small amount of anti-corrosion agent can be added as a flash, and the slide bearing bush will continue to rotate for as long as necessary to obtain a silvery luster.

  In order to obtain a uniform layer thickness, the anticorrosive is preferably added in several stages, in particular in 2 to 5 stages, and more preferably in 3 stages. The addition is carried out each time, preferably at a time interval of 5 to 60 minutes, in particular 10 to 20 minutes. After the total amount of anticorrosive agent has been added, the pH value is adjusted to a value between 1.6 and 2.0 using the activator and / or by addition of acid. Preferably, this value is kept constant until the end of the coating process.

  When the slide bearing bush has reached the desired thickness, the slide bearing bush is washed and separated from the other components of the mixture. This separation can be performed, for example, by sieving or by means of magnets.

  The subject of the present application is also a slide bearing bush manufactured by the method of the present invention.

  The invention is described in more detail below on the basis of examples of embodiments.

<< Comparative Example 1 >>
Willig (Germany) Saint-Gobain Performance Plastics Pampus GmbH, Norglide (TM) PRO XL, the following layer structure:
1. Metal jacket: DC4 cold strip with Cu / Bz plated on both sides and Bz side structure (Bz side structured)
2. Hot melt adhesive film (PFA film),
3. Plastic slide layer: Film containing fluoropolymer (PTFE and organic filler)
Rolled and flanged from a 10 mm wide strip profile using a series mould automatic stamp-bending machine from a 1.0 mm metal / plastic laminate having Composite bushing approximately 12,000 units with the following dimensions:
a) Flange diameter: 13 mm
b) Inner diameter: 7 mm
c) Wall thickness: 0.98mm
d) Total length: 7mm
Manufactured with.

  In order to obtain corrosion resistance for use as a bearing for doors and hinges in private cars, 6,000 units of the bushing are galvanized in a conventional manner and then treated with yellow chromate to protect against white rust. (Cr-VI).

  In 36% of the bushes thus produced, galvanized and yellow chromated against white rust, slight zinc segregation was observed in the running layer of the flange. These separations create a small crack in the polymer running layer during flange molding through which the electrolyte can penetrate to the bronze fabric reinforcement, thus reducing the electrolytic separation of zinc. Caused by the fact that it will allow. The deposition of zinc particles on the PTFE running layer adversely affects the leveling performance and service life of the slide bearing bush.

  In addition to this, there was a clear film separation in the flange area in 23% of the bushes. In addition, for all flanges, corrosion under the film surface down to a depth of up to 3 mm was observed, which extended outward from the intersection edge. The polymer film could be peeled off relatively easily using a deburring knife at the flange area and at the crossover edge with corrosion below the surface. Under the peeled film, there was a clear corrosion of the metal surface due to the action of the electrolyte diffused inside through the thin polymer layer.

  In the salt spray test according to DIN 50021, before the red rust began, only 72 hours could be obtained, not just the required 120 hours. In the salt spray test, subsurface corrosion and film peeling increased significantly.

Example 1
In order to obtain corrosion resistance for use as a bearing for a door / hinge of a private car, a bushing of 6,000 units (appearance volume of about 50 L) of the same type as in Comparative Example 1 was mechanically galvanized.

  To do this, the bush was first washed and degreased with a weak alkaline detergent and then filled into a conical octagonal coating drum. After filling with an approximately equal amount of glass beads (particle size range 0.4-1.2 mm) with respect to volume and an equal amount of tap water with respect to volume, the coating drum was set at 30 rpm. Next, to start the coating process, 1 L of nonylphenol polyglycol ether in dilute sulfuric acid (Activator B from Tolkmit Industries, Balve, Germany), 1 L, 5% tin sulfate solution in a mixture of dilute sulfuric acid and hydrochloric acid 50 g (promoter 2001 from Tolkmit Industries, Balve, Germany) and 50 g zinc powder as a zinc flash having an average particle size of less than 30 μm were added and rotated for 10 minutes. At a time interval of 10 minutes, 150 g of zinc powder was added four times, and rotated for an additional 30 minutes. The pH value of the aqueous phase in this case was 1-2, and this was checked at regular intervals. After the coating process, the bearing was removed from the drum, rinsed with water and dried.

  The bush thus produced has a uniform zinc layer having a thickness in the range of 12-18 μm. The bush does not show any zinc deposition on the slide layer, film peeling, or subsurface corrosion of the polymer layer. In the salt spray test according to DIN 50021, all test bushings achieved a resistance to red rust exceeding 130 hours. This bush was characterized by improved leveling performance compared to Comparative Example 1.

<< Comparative Example 2 >>
The following layer structure of Norglide ™ T0.5 type from Saint-Gobain Performance Plastics Pumps GmbH of Willich (Germany):
1. Metal jacket: DC4 cold strip galvanized on both sides and treated with yellow chromate,
2. Hot melt adhesive film (EFTE film),
3. Plastic slide layer: Film containing fluoropolymer (PTFE + carbon / graphite)
A rolled and flanged composite bushing 36,000 units from an 11 mm wide strip profile using a serial mold automatic press-bending device from a 0.5 mm metal / plastic laminate having :
a) Flange diameter: 17 mm
b) Inner diameter: 11 mm
c) Wall thickness: 0.48mm
d) Total length: 7mm
Manufactured with.

  In order to obtain corrosion resistance for use as engine bonnets, hinges and bearings in private cars, 30,000 units of the bushing are galvanized in a conventional manner and then treated with yellow chromate to protect against white rust. [Cr (VI)] given.

  For about 3% of the bushes produced in this way, significant deformation was observed both in the flange area and in the cylindrical part of the bush. The cause of this deformation was identified as mechanical deformation due to the relatively heavy electrodes in the galvanizing drum. In addition, 11 units of bushing damaged by excessive arcing were removed by screening. Because of the defects, 100% quality control of the bush was necessary. In the salt spray test, the resistance to the onset of red rust for 132 hours was measured.

Example 2
To obtain corrosion resistance for use as a private car engine bonnet hinge bearing, first, about 6,000 units of the same type of bearing as in Comparative Example 2 were mechanically zincated as described in Example 1. Plating was performed using a total amount of 300 g of zinc and forming a 15 μm thick zinc layer. A blue chromate [Cr (VIII)] coating was then applied for passivation, as well as a Finigad 105 sealer from Coventya, Guetersloh, Germany.

  A visual evaluation of the bush produced in this way and mechanically galvanized, blue passivated and sealed showed no defects. In the salt spray test, excellent resistance to red rust exceeding 300 hours was achieved. This bush is characterized by improved running characteristics compared to the bush produced according to Comparative Example 2.

<< Comparative Example 3 >>
The following layer structure of Norglide ™ T0.75 type from Saint-Gobain Performance Plastics Pumps GmbH of Willich (Germany):
1. Metal jacket: DC4 cold strip galvanized on both sides and treated with yellow chromate,
2. Hot melt adhesive film (EFTE film),
3. Plastic slide layer: Slide layer reinforced with bronze fabric (E-PTFE + glass fiber / graphite)
From a 0.75 mm metal / plastic laminate having an in-line mold automatic press-bending device, from a 8.5 mm wide strip profile, rolled and flanged composite bushing 38,000 units, The following dimensions:
a) Flange diameter: 20 mm
b) Inner diameter: 13 mm
c) Wall thickness: 0.78mm
d) Overall length: 5mm
Manufactured with.

  In order to obtain corrosion resistance for use as a multi-point hinge bearing in private cars, 32,000 units of the bush were galvanized in a conventional manner. They were then yellow chromated (Cr-VI) to provide protection against white rust.

  In 36% of the bushes thus produced, slight zinc separation was observed in the flange running layer. These separations are due to the electrolytic separation of zinc, because during the molding of the flange, microcracks are created in the polymer running layer through which the electrolyte can penetrate to the bronze fabric reinforcement. Caused by the fact that it will allow. Zinc particles deposited on the PTFE running layer contribute to increased wear during the run-in phase and shortened useful life during operation of the slide bearing bush. In the salt spray test, the bush is resistant to red rust for more than 120 hours.

Example 3
To obtain corrosion resistance for use as a multi-point hinge bearing in a private car, first, about 6,000 units of the same type of bush as in Comparative Example 3 were mechanically zinced as described in Example 1. Plating was performed using a total amount of 300 g of zinc, and a zinc layer having a thickness of 15 μm was formed. The bush was then coated with a silicate sealer by dipping, centrifuging, and drying.

  Visual evaluation of the bushes produced in this way revealed no zinc deposits or other abnormalities. In the salt spray test, good resistance to red rust over 140 hours was achieved. Tribological tests have confirmed that the corrosion layer treatment does not adversely affect the friction and wear behavior of the slide bearing.

  The above examples show that mechanically galvanized bearing bushes manufactured according to the method according to the invention have the following advantages compared to bearing bushes galvanized by conventional methods: :

  That is, the adhesion of the plastic slide layer to the metal jacket is not impaired by mechanical galvanization. For this reason, there is no peeling of the slide layer and no corrosion under the surface, and as a result, there is no region where the susceptibility to corrosion is increased. In addition, bushing damage and mechanical deformation caused by electric field concentration due to excessive arcing are avoided. In addition, the sliding ability of the sliding layer is not compromised by the build-up of corrosion resistance, which results in improved running-in performance and increased useful life.

Claims (30)

  A manufacturing method of a slide bearing bush including a metal jacket as a support and a plastic slide layer, wherein the metal jacket is provided with a corrosion-resistant layer on the outside, and the powdered corrosion-resistant agent is mechanically applied. The manufacturing method of the said slide bearing bush which forms the said corrosion-resistant layer by providing.   The method according to claim 1, wherein, when applied, the anticorrosive is pressed against the surface of the metal jacket.   3. A method according to claim 1 or 2, wherein the application of the anticorrosive is carried out by rotating a slide bearing bush in a mixture of powdered anticorrosive and a hard material object.   4. A method according to claim 3, wherein the rotation is carried out in a rotating drum filled with the mixture.   The method of claim 4, wherein the drum has a corner arrangement therein.   6. A method according to claim 4 or 5, wherein the drum has a floor and the cross section of the drum decreases towards the floor.   The method according to claim 3, wherein a spherical hard material object is used as the hard material object.   The method according to claim 7, wherein the spherical hard material object has an average diameter of 0.1 to 10 mm, in particular 0.4 to 1.2 mm.   The method according to claim 3, wherein a glass ball is used as the hard material object.   The method according to any one of claims 1 to 9, wherein a metal powder, particularly zinc, tin, aluminum, and / or an alloy thereof is used as the corrosion-resistant agent.   The method according to claim 10, wherein the metal powder has an average particle size of 1 μm to 1 mm, in particular 3 to 20 μm.   The method as described in any one of Claims 1-11 using zinc powder as a corrosion-resistant agent.   The method according to any one of claims 3 to 12, wherein the mixture comprises water.   14. Process according to claim 13, wherein the mixture is an aqueous suspension and the aqueous phase has a pH value of 0-7, in particular 1-3.   The method according to any one of claims 3 to 14, wherein the mixture comprises at least one additive selected from the group consisting of activators, accelerators, defoaming means, and metal salts, in particular copper salts. .   16. A method according to any one of claims 3 to 15, wherein the volume ratio of the hard material object to the slide bearing bush is about 0.3 to about 3, and in particular 1.   17. A method according to any one of claims 13 to 16, wherein the hard material object / slide bearing bush / water volume ratio is about 1/1/1.   The method according to any one of the preceding claims, wherein the mechanical application is carried out at 5 to 40C, in particular at 21 to 26C.   19. The anticorrosive agent is added in several steps, in particular divided into 3 to 5 steps, with a time interval of 5 minutes to 1 hour and in particular with a time interval of about 15 minutes. The method according to claim 1.   The method according to any one of claims 1 to 19, wherein the slide bearing bush is washed and / or degreased before application of the corrosion resistant layer.   21. The method according to any one of claims 1 to 20, wherein the slide bearing bush is subjected to a surface treatment, in particular a chromate treatment or a seal treatment, after application of the corrosion resistant layer.   The method according to any one of claims 1 to 21, wherein the metal jacket is a jacket made of steel, stainless steel, aluminum, bronze, brass, titanium, and / or copper, or an alloy thereof.   23. A method according to any one of the preceding claims, wherein the plastic slide layer comprises a fluoropolymer and / or an organic or inorganic filler.   24. The method of claim 23, wherein the filler comprises glass fiber, carbon, graphite, or aromatic polyester.   25. The plastic according to claim 1, wherein the plastic is a polytetrafluoroethylene (PTFE) -based, perfluoroalkoxyalkene (PFA, MFA) -based, and / or tetrafluoroethylene-hexafluoropropylene (FEP) -based plastic. The method according to one item.   26. A method according to any one of the preceding claims, wherein the plastic slide layer comprises a metal member.   The metal member is a reinforcing material having an open structure, a woven fabric, in particular, a wire mesh, an expanded metal rib mesh, a non-woven fleece, in particular, a metal fleece, a metal foam, a perforated disk, a porous metal layer, and 27. The method according to claim 26, wherein the sheet is a metal sheet having a surface structure with a cutout disposed on the surface side.   The metal member is made of bronze, copper, chromium, nickel, zinc, zinc-iron alloy, zinc-nickel alloy, and / or aluminum or alloys thereof, tin bronze, or steel fabric, in particular stainless steel. The method according to 26 or 27.   The plastic slide layer is bonded to the metal jacket by a hot melt adhesive film, in particular by ethylene tetrafluoroethylene copolymer (ETFE) and / or perfluoroalkoxy copolymer (PFA). 29. A method according to any one of 28.   A slide bearing bush obtained by the method according to any one of claims 1 to 29.