JPH0799174B2 - Sliding bearing manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of manufacturing a sliding bearing used in equipment such as a copying machine and a typewriter.

[Outline of the Invention] The present invention uses a pultrusion molding method to manufacture a sliding bearing composed of a metal material on the outer side and an tetrafluoroethylene resin material on the inner side, which does not use an adhesive but has excellent sliding characteristics. By doing
High-precision sliding bearings can be mass-produced at low cost.

[Prior Art] Conventionally, as a method of manufacturing a non-lubricating oil sliding bearing in which an outer side is made of a metal material and an inner side is made of a wear-resistant synthetic resin material, a metal pipe and a synthetic method in which the inner diameter of the pipe is set as an outer diameter Cut a metal ring and a synthetic resin ring of a predetermined size from the resin tube, apply an adhesive to the synthetic resin ring and fit it to the metal ring to integrate it, then cut the inner surface of the synthetic resin ring Then, the method of making a product is adopted.

[Problems to be Solved by the Invention] The manufacturing method includes a metal pipe cutting step, a synthetic resin tube cutting step, a cut metal ring and a synthetic resin ring fitting step, and an adhesive applying step before that, Since it consists of many steps of cutting the fitted synthetic resin ring,
The productivity is very poor and the cost is high.

In particular, when constructing the above sliding bearing, it is most suitable to use a tube made of tetrafluoroethylene resin, which is excellent in sliding characteristics, but this synthetic resin cannot be used because it cannot be bonded with an adhesive.

[Object of the Invention] The object of the present invention is to simplify the process as compared with the conventional method for manufacturing a sliding bearing, to significantly improve the work efficiency and to reduce the product cost. An object of the present invention is to provide a method for manufacturing a sliding bearing in which ethylene resin can be bonded with an adhesive.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a tube-shaped or round-bar-shaped filled tetrafluoroethylene resin core material with an adhesive applied to the surface thereof in advance. , By pulling both metal pipes whose inner surfaces have been brush-polished and primed through a die in advance, a long composite body in which both are fitted and integrated with an adhesive is made, and then this long composite body This is intended to solve the above-mentioned problems by cutting the filler-containing tetrafluoroethylene resin core portion to finish it into a product.

[Operation] In the above manufacturing method, the adhesive is applied to the surface of the filler-containing tetrafluoroethylene resin core material that is pulled out through the metal pipe base through the die. Compared to this, it is much more efficient. Also, since the metal pipe and the core material are integrated and then the cutting process is performed, the cutting process can be performed only once.

Moreover, since the metal pipe is preliminarily subjected to brush polishing and primer treatment, and the filler-containing tetrafluoroethylene resin core material is preliminarily activated, both of them pulled out through the die are bonded with an adhesive. Are firmly integrated.

[Embodiment] FIG. 1 shows an embodiment of the method of the present invention.

In the figure, 1 is a long metal pipe used as a material for manufacturing a sliding bearing, and 2 is a wear-resistant long filler-containing tetrafluoroethylene resin tube.

The metal pipe 1 may be any metal material that can be drawn by a die, and for example, a metal material such as aluminum, copper, stainless steel, or brass is used.

The inner surface of the metal pipe 1 is previously ground and primed. In addition, the surface of the tetrafluoroethylene resin tube containing the filler is, for example,
Etching by immersing in a mixed solution of SD naphthalene,
Activated in advance.

To manufacture a sliding bearing using the metal pipe 1 and the filled tetrafluoroethylene resin tube 2 as raw materials,
As shown in the figure, the die 2 is inserted into the metal pipe 1 while the tube 2 supported by the plug 3 is inserted and the adhesive 4 is supplied and applied to the surface of the tube by an adhesive applying device (not shown). Paint through.

By the above-mentioned drawing process, the metal pipe 1 and the tube 2 which have passed through the die are fitted with each other, and a long composite A [see FIG. 2] integrated with the adhesive 4 is obtained. Next, the long composite A is subjected to continuous cutting on an automatic lathe to continuously process the inner surface of the synthetic resin tube into a predetermined size and cut into a large number of composite members a to be final products. Is obtained. This composite member a is shown in FIGS. 3 and 4.

As the adhesive agent for adhering the above-mentioned filled tetrafluoroethylene resin tube and metal pipe, any adhesive agent can be used as long as it can sufficiently adhere both.

When using the adhesive, the inner surface of the metal pipe is brushed and primed in advance, and the tube is filled with a filler and the surface of the tetrafluoroethylene resin tube is pre-activated to enhance the adhesive strength of the adhesive. , The metal pipe and the tube are firmly integrated via an adhesive.

In the above embodiment, the plug 3 supporting the tube 2
Is used to prevent the constriction of the tube at the time of pulling out, but when a round bar material is used instead of the tube core material, a plug is not necessary. Instead, the obtained composite member needs to be hollowed out.

Next, specific examples of the present invention will be shown below.

Example [1] Metal pipe: An aluminum pipe whose inner surface is brush-polished and treated with a primer (inner diameter 21.0 mm, wall thickness 1.25 mm, length 2 m,
Uneven thickness 5/100 mm or less) Brush the inner surface of the pipe with brush and apply primer treatment.

Core resin tube: Enylene tetrafluoride resin tube containing 30% by weight of engineering plastic (inner diameter 18.9 mm, wall thickness 1.0 mm, length 2 m)
Activate the tube surface.

Adhesive: Room-temperature curing type two-component epoxy adhesive (Cemedine # 1500) The aluminum pipe is drawn by the drawing device shown in Fig. 1 to an inner diameter of 19.0 mm and a wall thickness of 1.25 mm.・ Integrated adhesive and core resin tube. After that, leave it at room temperature for 24 hours to harden the adhesive, and then perform continuous cutting with an automatic lathe to obtain an outer diameter of 21 mm and an inner diameter of 18 mm.
A composite sliding bearing having a height of 8 mm and a height of 8 mm was obtained.

Example [2] Metal pipe: An aluminum pipe whose inner surface is brush-polished and primed (inner diameter 12.6 mm, wall thickness 1.2 mm, length 2 m)
The inner surface of the pipe is brushed and primed.

Core resin Round bar: Glass fiber-containing tetrafluoroethylene resin (outer diameter 10.9 mm, length 2 m) The surface of the round bar is activated.

Adhesive: Room-temperature curable two-component mixed epoxy adhesive (Cemedine # 1500) Same as Example [1], outer diameter 13 mm, inner diameter 10 mm, height
8mm composite sliding bearing was obtained.

Comparative example [1] (Prior art) Metal rod: Aluminum rod (outer diameter 14 mm, length 1 m) Core resin round rod: Glass fiber-containing tetrafluoroethylene resin (outer diameter 12 mm, length 1 m) Adhesive ...... Room temperature curing type two-component mixed epoxy adhesive Adhesive material with outer diameter 13mm, inner diameter 11mm, height 8mm, core resin round bar, outer diameter 11mm, inner diameter 7mm, height 8mm An adhesive agent was applied to the cut resin ring body, and was pressed into the cut aluminum ring body with a press. After curing the adhesive, only the inner diameter is cut with a lathe to obtain an outer diameter of 13 mm, an inner diameter of 10 mm,
A composite sliding bearing with a height of 8 mm was obtained.

Comparative Example [2] Metal Pipe: Aluminum Pipe (Same as Example [2]) No processing on the inner surface of the pipe.

Synthetic resin round bar: Glass fiber-containing tetrafluoroethylene resin (outer diameter 11.5 mm, length 2 m) No processing on the surface of the round bar.

Adhesive: not used Same as Example [1], outer diameter 13 mm, inner diameter 10 mm, height
8mm composite sliding bearing was obtained.

The characteristics of the sliding bearings obtained in the above Examples and Comparative Examples are shown in Table 1 below.

Processing accuracy (process control capacity CP), Cutting tool (diamond tool), wear amount (μm / co) Wear coefficient = ΔW / PVTρS where ΔW: amount of change in steady wear area (g), P: load (kgf / cm ² ) T: wear time, V: Sliding speed (cm / sec), ρ:
Resin density (g / cm ² ), S: Projected area, Measurement condition: PV = 100
(P = 2.5, V = 401), shaft: SUS304 3.2S) The above-mentioned Examples [1], [2] and Comparative Example [1] (prior art).
As is clear from the comparison, according to the present invention, the cutting time can be significantly shortened without lowering the cutting accuracy, and therefore mass production and cost reduction can be achieved.

Comparative Example [2] does not use an adhesive, but instead squeezes the aluminum pipe from the outer diameter of the resin to integrate the two by caulking force. In this case, the resin portion elastically deforms during cutting. As a result, the cutting accuracy deteriorates. On the other hand, in the present invention, by firmly integrating the metal portion and the core resin portion with the adhesive, elastic deformation during cutting of the core resin portion can be prevented, and high cutting accuracy can be reliably obtained. .

[Advantages of the Invention] As described above, according to the present invention, a metal pipe having an inner surface subjected to brush polishing and a primer treatment, and a filler-containing tetrafluoroethylene resin core material having an activation treatment applied to the surface thereof are provided. Since it is manufactured by a pultrusion molding method via an adhesive, a highly accurate sliding bearing in which a metal pipe and a resin core material are firmly integrated can be mass-produced at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of an apparatus for carrying out the present invention, FIG. 2 is a side view of a long composite, FIG. 3 is a front view of a sliding bearing, and FIG. 4 is a sectional view. 1 ... Metal pipe, 2 ... Filled tetrafluoroethylene resin tube, 3 ... Plug, 4 ... Adhesive, 5 ... Die, A ... Joined body, a ... Composite member.

Claims (1)

[Claims] 1. A metal pipe having an inner surface preliminarily brush-polished and primer-treated with an adhesive applied to the surface of a pre-activated tube-shaped or round-bar-shaped filled tetrafluoroethylene resin core material. By pulling out through a die, a long composite body in which both are fitted and integrated with an adhesive is made, and then the filled tetrafluoroethylene resin core material part of this long composite body is cut. A method for manufacturing a sliding bearing, which is characterized in that it is a product.