Motorcycle clutch iron base friction sheet, preparation process and pairing sheet thereof

A friction plate and clutch technology, applied in friction linings, mechanical equipment, etc., can solve problems such as complex process, high cost, and high price, and achieve the effects of long service life, low cost, and simple manufacturing process

Inactive Publication Date: 2008-12-24
重庆市璧山区三泰粉末冶金有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the friction plate works in an oil bath, it is usually considered that the friction material made of copper base + alloy elements is coated on the steel skeleton and sintered to form a friction plate, or carbon-based friction material + copper (15%- 30%) + other alloy elements + adhesives are pressed into friction plates at 200°C. This kind of powder metallurgy friction material using a large amount of copper base is relatively expensive and the process is complicated. If it is necessary to combine the friction material layer and the steel skeleton for sintering And the high pressing temperature of the material is not conducive to the use in the motorcycle industry
There are also technical considerations to use iron-based powder metallurgy materials to make the skeleton, and coat the friction material on the working surface for hot pressing, but the process is complicated and the cost is high
The technology of directly using iron-based powder metallurgy friction materials to press and sinter into wet friction plates for motorcycle clutches has not been reported yet.

Method used

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  • Motorcycle clutch iron base friction sheet, preparation process and pairing sheet thereof
  • Motorcycle clutch iron base friction sheet, preparation process and pairing sheet thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment (1

[0027] The iron-based friction plate sample is composed of 2% manganese, 0.21% silicon, 1.7% copper, 0.8% nickel, 0.6% carbon, and the rest is iron; the raw materials are loaded into the mixer according to the above formula ratio, and the evenly mixed powder Loaded into the mold, at a unit pressure of 5t / cm 2 Lower molding; put the pressed product into the sintering furnace, the firing temperature is 1130°C to 1160°C, and then cool slowly. If the surface flatness of the product does not meet the requirements, it needs to be shaped with a mold on the press, and finally to get the finished product. The friction and wear parameters measured by the above products on the screen display PV friction testing machine are: the wear amount after 8 hours of friction is 0.010mm, the amount of wear after friction for 8-35 hours is 0.029mm, the amount of wear after friction for 35-55 hours is 0.021mm, and the coefficient of dynamic friction 0.130, dynamic moment > 50N·m. The tensile streng...

Embodiment (2

[0032] The iron-based friction plate sample is composed of 0.5% chromium, 5% manganese, 1.5% copper, 0.8% molybdenum, 1.0% carbon, and the rest is iron. It is prepared by sintering by the powder metallurgy process of Example 1. The obtained product is tested on a screen-display PV friction testing machine. The test conditions and requirements are the same as those in Example (1), and the test results are: coefficient of dynamic friction 0.118, dynamic torque > 50N m, single-chip wear in the first 28 hours 0.035mm, the wear amount after 27 hours is 0.020mm. The tensile strength of the friction plate is 90-120MPa.

[0033] The dual plate used in conjunction with this friction plate sample is made of Q235 mild steel sample, and the surface is made by soft nitriding treatment.

[0034] The friction plate has passed the motorcycle road test for 5000 hours, which proves that the performance is qualified.

Embodiment (3

[0036] The iron-based friction plate sample is composed of 1.0% manganese, 5% copper, 0.8% carbon, 0.1% silicon, 0.8% nickel, 1.6% iron sulfide, and the rest is iron. Adopt the powder metallurgy process of embodiment (1) to make, test on the screen display type PV friction testing machine, test condition is the same as example (1), wear continuously for 20 hours; test result is: dynamic friction coefficient 0.097, dynamic moment>50N m. The wear amount in the first 10 hours is 0.015mm, and the wear amount in the next 10 hours is 0.012mm. The tensile strength of the friction plate is 85-110MPa.

[0037] The dual plate used in conjunction with this friction plate sample is made of Q235 mild steel sample, and the surface is made by soft nitriding treatment.

[0038] The friction plate has passed the motorcycle road test for 5000 hours, which proves that the performance is qualified.

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Abstract

The invention provides an iron base friction plate for a motorcycle clutch which is sintered by an iron-base powder metallurgical material. The formula comprises the following compositions of the iron base friction plate in percentage by weight: 1.0 to 6.0 percent of manganese, 0.2 to 1.5 percent of carbon, 1.0 to 5.5 percent of copper, respectively more than 0 but less than 10.0 percent of one or a plurality of compositions of silicon, molybdenum, chromium, nickel, lead, ferric sulfide, tungsten, silicon dioxide, calcium sulfide and asbestos, and the balance being iron, with a density range of the friction plate of between 6.2 and 7.2g/cm<3>. The friction plate uses iron as a base with low cost, which is only one sixth to one tenth of the cost of a copper base material; with the adoption of a powder metallurgy technology, the manufacturing process of the iron base friction plate is simpler than that of the copper base friction plate. A dual disc matched with the friction plate is made of a mild steel disc, and is subject to nitridizing heat treatment or soft nitriding heat treatment on the surface, with a thickness of a nitration case of the dual disc more than or equal to 0.005mm and hardness of the dual disc more than or equal to 350HV0.1. The friction plate can be used under a wet condition, not only has a higher friction coefficient (0.09 to 0.13), but also has excellent wearing resistance, and can be used in the motorcycle clutch.

Description

Technical field: [0001] The invention relates to a wet friction plate for a clutch in the motorcycle industry and a counter plate thereof. Background technique: [0002] The friction plate of the clutch in the motorcycle engine works in an oil bath, and its working oil temperature is -40°C to +120°C. In fact, the temperature of the friction plate working surface in the half clutch state depends on the engine speed and half clutch time. The length far exceeds +120°C. The existing wet friction plate is made of rubber cork-based material, which has problems such as low temperature resistance, short working life, and weak overload resistance. Friction plate ablation accounts for a large proportion of frequent faults in motorcycles, especially for tricycles, ATVs, large-displacement racing cars and off-road vehicles. The failure of friction plate ablation has seriously affected their market. At present, many motorcycle engine manufacturers use road tests under overload and hars...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02
Inventor 李俊王勇曾维建高家诚扶新
Owner 重庆市璧山区三泰粉末冶金有限公司
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