JPS6188022A - Method of manufacturing bearing - Google Patents

Abstract

PURPOSE:To improve dimensional accuracy and durability by arranging plural synthetic resin slidable face plates which are independent respectively, on one side of a belt-like metal base plate having plural through holes, windingly machining the base plate with said resin surface inside, and forming said base plate into a cylindrical shape. CONSTITUTION:A number of through holes 5 are provided on a belt-like metal base plate 1, and plural synthetic resin slidable face plates 2 are fixed to the metal base plate 1 by means of molding in an integrated form or welding, bonding, etc., with the parts of the face plates being filled or fitted into the through holes 5 in an integrated form. Then, the base plate 1 is windingly machined with the resin-slidable surface inside and is formed into a cylindrical shape, to make it into a bearing. On the inside of the manufactured bearing, the synthetic resin slidable face plates 2 which have a desired shape and which are independent respectively, are arranged leaving gaps between each other, and with grooves 3, 4 having certain angles to the axial direction being provided in the gaps.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a method of manufacturing a bearing in which a synthetic resin sliding surface is attached to a metal outer cylinder, and is concerned with improvements in dimensional accuracy, durability, and heat dissipation. The present invention relates to a method for manufacturing a bearing with improved properties through a simple process.

(b) Conventional technology The use of synthetic resin materials as sliding surface materials for bearings has a self-lubricating property compared to metal sliding surface materials, resulting in a lower coefficient of friction and a higher sliding absorption capacity ( It is widely used because it does not generate noise, has excellent corrosion resistance, chemical resistance, electrical insulation, etc., and is easy to process and low cost. , due to its low heat resistance and high coefficient of thermal expansion, dimensional changes cannot be ignored, and some materials may absorb moisture and swell in a high humidity atmosphere, causing dimensional changes as well. When JE is used, it is necessary to increase the design value of the clearance with the shaft, which inevitably leads to a decrease in accuracy.

Furthermore, including creep deformation due to the above expansion and contraction,
The load bearing capacity also becomes lower.

In order to compensate for these drawbacks of synthetic resin bearings, a synthetic resin bearing is reinforced by lining it with a fully bent outer cylindrical member, such as the invention described in US Pat. No. 3,552,816.

However, in all conventional bearings, the metal outer cylinder is obtained by machining, gui-casting, etc., and has a relatively thick standard shape from the beginning, with a synthetic resin sliding member inserted and attached to the inner surface. However, as will be explained later, there were many drawbacks.

(C) Problems to be Solved by the Invention As mentioned above, conventional bearings mainly have cast fully bent outer cylinders, which not only makes it difficult to attach resin sliding surfaces, but also makes it difficult to attach resin sliding surfaces, especially when the bearings are small. It is difficult to carry out agricultural operations, and furthermore, the dissipation of frictional heat is incomplete, and there is a risk that the sliding member may collapse in the axial direction, or a gap may be created between the outer cylinder and the sliding member. However, there were drawbacks such as abrasion particles and the like remaining in the process, accelerating wear.

The present invention was made with the aim of solving the above-mentioned drawbacks of conventional bearings, significantly improving dimensional accuracy, durability, etc., and providing a method for manufacturing bearings that has an extremely simple process. This is the completed version.

(d) Means for Solving the Problems Technical means taken in the method of manufacturing a bearing according to the present invention will be specifically explained below based on the embodiment shown in the drawings.

FIG. 1 shows a perspective view of a completed bearing manufactured by the bearing manufacturing method according to the present invention, in which (1) is a metal substrate,
A groove (2) having a desired angle with respect to the axial direction is formed between two synthetic resin sliding face plates (2) having a cylindrical shape and having a desired shape with a gap between them.
J, (4) are arranged and fixed so that the metal surfaces are exposed inside at the grooves (3) and (4).

2nd v! FIG. 3 shows the manufacturing process of the bearing manufacturing method according to the present invention, in which a large number of through holes are formed in a band-shaped metal substrate (1), and a plurality of independent synthetic resin slides are formed. A part of the sliding surface plate (2) is fixed to a metal substrate by integral molding, melting, gluing, etc. so as to integrally fill or fit into the through hole (5), and then a resin sliding surface is fixed to the metal substrate. The bearing is characterized in that it is made into a cylindrical shape by winding processing or the like so that the inner side is on the inside.

That is, according to the manufacturing method according to the present invention, the bearing is completed by rolling after the sliding surfaces have been processed and fixed securely and completely in advance, so that individual independent sliding members can be attached to the cylindrical part. It not only simplifies and lowers the cost by eliminating the extremely difficult and complicated process and work of inserting the shaft, but also improves dimensional accuracy. Items with different directions and angles can also be easily installed.

Furthermore, the bearing manufactured by the manufacturing method according to the present invention has many advantages, unlike conventional products, as follows.

That is, since the plurality of sliding face plates (2) are each independently and integrally fixed to the gold clay substrate (1), there is no possibility of expansion or contraction due to frictional heat or environmental temperature, or expansion due to moisture absorption, drying, etc. Volume changes such as shrinkage are absorbed by the grooves (3) and (4) that are disconnected from the sliding face plate and have the desired direction, significantly improving dimensional accuracy, and as a result, the bearing is prevented from clinging to the shaft. By preventing this, the design value of the clearance with the shaft can be reduced, and the precision of the bearing can be improved.

Also, the exposed groove portion (3) of the metal substrate around the sliding face plate;
(4) acts as a cooling groove, and the heat generated by traction friction is directly dissipated to the outside through the metal surface with a large heat transfer coefficient, which eases operating conditions and significantly improves the durability of the bearing. .

That is, the metal substrate in the bearing manufactured by the manufacturing method according to the present invention not only maintains the shape and dimensions of the bearing and maintains load resistance, but also functions as a heat sink.

Furthermore, the wear of bearings is greatly accelerated by the entry of wear particles into the sliding surface, but in the bearing based on the present invention, the wear particles are discharged through the grooves around the sliding face plate, so that the sliding There is no penetration into the surface and there is a significant improvement in the wear resistance of the bearing.

Furthermore, according to this manufacturing method, by changing the shape and size of the sliding face plate, the grooves (3) and (4) can be designed in any direction, not just in one direction, thereby improving heat dissipation and resistance. It is possible to have a structure that takes wear, lubrication, etc. into consideration as appropriate.

Furthermore, in conventional bearings, it was difficult to process grooves such as oil grooves on the sliding surface of the bearing, but according to the manufacturing method of the present invention, this can be done extremely easily as shown in the examples described later. I can do it.

(e) Examples Below, the bearing manufacturing method according to the present invention will be specifically explained by giving examples of implementation.

For example, through-holes with an appropriate pitch and diameter, such as φ1 to 8 mm and pitch of 2 to 10 mm, are formed by a processing method called outsert injection described in JP-A No. 56-99657, or by press processing, etc. The metal substrate (1) having the thermoplastic resin (5) is mounted on the injection molding molds (6) and (6)' as shown in FIG.
For example, by using polyacecool resin etc. through the through-holes (5) of the substrate, a plurality of independent synthetic resin sliding face plates (2) are formed with gaps between them to form grooves (3) and (4). The composite substrate shown in FIG. 2 was obtained by injection molding integrally with a metal substrate, and this was bent using a press mold or the like.
A cylindrical bearing shown in FIG. 3 is manufactured.

The synthetic resin material used in this case may be thermoplastic or thermosetting as long as it can be injection molded.

Surface processing such as oil grooves on the sliding surface can also be easily performed at the same time as the above molding by using an injection mold.

Next, as another example, a pin-shaped protrusion (7) having a shape that follows the inner surface of the cylindrical metal substrate after processing and that can fit into the through hole (5) of the metal substrate is integrally formed. By forming in advance a sliding surface segment (Fig. 5) to be used, the pin-shaped protrusion (7) is fitted and fixed into the through hole (5), and rolled so that the resin surface is on the inside. We can also manufacture bearings.

For the above-mentioned fitting and fixing, if necessary, use an appropriate adhesive between the metal substrate and the synthetic resin sliding face plate, or melt the tips of the protruding pin-shaped parts under heat and pressure to form the through-holes. It is also possible to achieve the effect of integral fixation by completely fixing to, or by using both together.

In this case, the resin for the sliding face plate may be a thermosetting resin such as a phenol resin, a thermoplastic resin such as polyphenylene sulfide (PPS), nylon, polyethylene, etc., as long as it is a synthetic resin material that can be injection molded. , whichever is fine.

(f) Effects of the invention As mentioned above, the method of manufacturing a synthetic resin sliding surface bearing according to the present invention not only makes it easier and lower cost to manufacture this type of bearing, which was conventionally complicated and difficult. By implementing this manufacturing method, it also contributes to improved dimensional accuracy when using the completed bearing, prevention of clinging to the shaft, dissipation of frictional heat, circulation of lubricant, discharge of friction powder, etc. It is something that can be done.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of a bearing manufactured by the bearing manufacturing method according to the present invention, FIGS. 2 and 3 show the manufacturing process of this manufacturing method, and FIG. FIG. 2 is a plan view of an embodiment of a composite substrate fixed to a substrate and before winding processing, and FIG. 2 is also a sectional view. FIG. 3 is a longitudinal cross-sectional view after the same rolling process, and FIG. 4 is a cross-sectional view of the sliding surface treated in a rigid state by outsert injection. FIG. 5 is a perspective view of a sliding face plate segment, and FIG. 6 is a diagram of an embodiment in which the shape of the sliding face plate is changed. In the figure 1-・-・----m-metal substrate 2-・-・----
---Synthetic resin sliding face plate 3.4-----One groove 5----Through hole (through hole) 6.6'-
・−・Mold 7・−・−−−−−−m−Fitting pin-shaped protrusion Patent applicant Starlight Industries Co., Ltd. 944 Figure 6

Claims (2)

[Claims] (1) A plurality of independent synthetic resin sliding face plates (2) are placed on one side of a band-shaped metal substrate (1) having a plurality of through holes,
A method of manufacturing a bearing, characterized in that the bearings are arranged so as to form a groove in the middle with a gap between them, are integrally fixed to a metal substrate, and are rolled into a cylindrical shape so that the resin surface faces inside. (2) The method for manufacturing a bearing according to claim 1, characterized in that the synthetic resin sliding face plate (2) is integrally molded and fixed to the metal substrate (1) by injection molding.