JPS62500395A - Ring with friction material coating on conical surface - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] A ring with a bar in a cone The invention relates to a ring according to the generic concept of claim 1.

This type of ring is well known (DE-OS 2055345).

Rings according to DIE-032055345 have excellent strength and wear resistance. However, it is very expensive. This expensive friction material is made with processing additives and thick coatings. It must be applied as a film.1゜The special tools required to process this friction material are used to form a conical shape. Grinding the friction surfaces, as well as the grooves, usually helical grooves, is accompanied by significant tool wear. , keep tool wear within certain limits and/or reduce the strength of the friction material coating. In order to prevent this from occurring, the depth of the groove must not exceed the film thickness.

However, in order to drain oil quickly enough as an oil cleaning groove, the depth of the groove must be small. The oil must not be drained from the slit at the clutch in, especially at the beginning of the synchronous stroke. This causes the friction surface to come into contact with the other surface.

Therefore, a thin friction material coating with no grooves is attached to the ring, and the necessary grooves are installed on the mating surface. I tried to do it. However, this may not be satisfactory if the mating surface is significantly worn and the load is large. You cannot get a long life.

This invention has less wear and tear on the friction material and is easy to manufacture. Conforms to a primary claim superconcept that guarantees performance and longevity equal to a ring according to 55345. The purpose is to obtain a ring.

This object is achieved by a ring having the features set out in the first claim. moreover Due to the features described in the secondary claims, a high coefficient of friction and/or a rapid coefficient of friction are achieved. increased numbers and/or low material and manufacturing costs, and (Or) Advantages such as high height and long life can be obtained. As a result of experiments, the ring according to this invention is In certain use cases, it may be faster than the known ring according to DE-032055345. It has been proven that a higher lifespan can be obtained.

Embodiments of the ring according to the present invention will be described below based on the drawings.

Figure 1 is a longitudinal cross-sectional view; Figure 2 is a front view; FIG. 3 is an enlarged view of a part of the cross section developed along the circumference U of the friction surface 2.

The ring 1 has a female conical friction surface 2. Width N, depth T, flank 4, bottom 7 also By means of the axial groove 3 the friction surface 2 is divided into individual friction surfaces 5 in the form of webs 5 of width S. It will be done. The groove width N and the web width S are measured along the average circumference U of the friction surface 2. molybdenum A coating 6 covers the web 5, the flank 4 and the bottom 7. Film thickness of molybdenum film 6 H is 0.06 to 0.10 fi. The ratio of groove width N to web width S is 0. 5 to 3.0. The ratio of groove depth T to web width S is 0.2 to 1.5. . The ratio of the web width S to the circumference U does not exceed 0.01, the groove width is at least 0. ．． 8tm. The groove width S is 0.5 to 3.0 m.

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Claims (10)

[Claims] (1) The ratio of groove width (N) to web width (S) is 0.5 to 3.0, especially 1.5 to 2.2, The ratio of the web width (S) to the circumference (U) of the friction surface (2) does not exceed 0.01 It is characterized by being made of a metal material and having a friction material coating on the conical friction surface. The friction surface is divided into individual friction surfaces in the form of webs by grooves running in the axial direction. synchronizing rings, especially for gear systems. (2) A bearing characterized in that the friction surface (2) co-operates with a mating surface made of surface-hardened steel. A ring as described in item 1 of the requested scope. (3) The ring (1) is made of highly compressed sintered material, and the groove width (N) is at least 0. 8 mm, and the web width (S) is 0.5 to 3.0 mm. A ring according to claim 1 or 2. (4) Ring (1) is made of sintered steel similar to SintD30 and has a density of at least 4. The ring according to claim 3, wherein the ring has a weight of 6.9 g/cm2. (5) Molybdenum is used as the friction material, and the thickness of the molybdenum coating (6) is 0.06 to 0. ．． 5. The ring according to claim 1, wherein the ring has a diameter of 10 mm. (6) The molybdenum coating (6) is made by a flame spraying method and is characterized by no post-processing. The ring according to claim 5. (7) Nickel is used as the friction material, and the thickness of the nickel coating (6) is 0.02 to 0.0. 5. The ring according to claim 1, wherein the ring has a diameter of 3 mm. (8) The Ruckel coating (6) is produced by a chemical method and is characterized by no post-processing. A ring according to claim 7. (9) The ratio of groove depth (T) to web width (S) is 0.2 to 1.5. A ring according to each claim characterized by: (10) Groove flank (4) forms an obtuse angle of 110 to 130° with friction surface (2) A ring according to each claim characterized by: