Automobile brake disc and manufacturing method thereof

A technology for automobile brakes and brake discs, applied in the direction of brake discs, etc., can solve the problems of casting dimensional accuracy, poor surface finish, difficult control of internal shrinkage pores, difficult parts disassembly and maintenance, etc., to reduce processing costs , increase the payload of the car, and the effect of easy control of dimensional accuracy

Active Publication Date: 2015-11-11
NINGBO HIGHRISE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cast iron brake discs have the following disadvantages; 1. The density of cast iron is high, with a density of 7.3g / cm 3 About, and a Φ288mm×44.3mm brake disc weighs about 6.5Kg (equivalent to a sprung weight of 19.5~32.5Kg), and a car needs 4 pieces, so its unsprung weight is relatively large, which will undoubtedly be obvious Increase the fuel consumption of the vehicle and reduce the maneuverability of the vehicle. In addition, it is difficult to disassemble and maintain related components; 2. The thermal conductivity of cast iron is poor, and the heat generated by friction during braking is slow to dissipate, which may easily cause the brake system to fail due to excessive temperature rise.
3. Cast iron brake discs are generally cast with sand castings. The dimensional accuracy and surface finish of the castings are poor, and the internal shrinkage pores are not easy to control. The labor intensity of casting production is high and the environmental pollution is relatively large.

Method used

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  • Automobile brake disc and manufacturing method thereof
  • Automobile brake disc and manufacturing method thereof
  • Automobile brake disc and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: as figure 1 The automobile brake disc shown is a solid brake disc of Φ288mm (outer diameter)×44.3mm (thickness). The brake disc body is an aluminum alloy brake disc body. The two aluminum alloy brake disc body 1 A layer of wear-resistant layers 3 and 4 are respectively compounded on the two working surfaces. The wear-resistant layers 3 and 4 are wear-resistant layers of ceramic reinforced material. The wear-resistant layer of ceramic reinforced material is metallurgically combined with the aluminum alloy brake disc body 1 through extrusion casting process. , the preparation method of the solid brake disc comprises the following steps:

[0039] 1) Preparation of raw materials for the production of ceramic reinforcing materials: by volume fraction, weigh 13% of short aluminum silicate fibers, 7% of silicon carbide particles, 20% of low-temperature binders and 60% of high-temperature binders to be dried agent, the low-temperature adhesive is a 5% carboxymeth...

Embodiment 2

[0045] Embodiment 2: It is a solid brake disc, its structure is the same as that of Embodiment 1, and the specific structure diagram is shown in figure 1 , the preparation method of the solid brake disc comprises the following steps:

[0046] 1) Preparation of raw materials for the production of ceramic reinforcement materials: by volume fraction, weigh 10% of alumina short fibers, 10% of fly ash particles, 5% of silicon carbide particles and 25% of low-temperature binder to be dried And 50% high-temperature adhesive, the low-temperature adhesive is a carboxymethyl cellulose aqueous solution with a concentration of 3%, and the high-temperature adhesive is a silica sol solution with a concentration of 12%;

[0047] 2) Production of ceramic prefabricated parts: Mix the prepared alumina short fibers, fly ash particles, silicon carbide particles, low-temperature binder and high-temperature binder evenly, then quantitatively pour into the prefabricated part mold, and vacuumize to ...

Embodiment 3

[0052] Embodiment 3: as Figure 4The automobile brake disc shown is a ventilated brake disc of Φ288mm (outer diameter)×44.3mm (thickness), including the brake disc body 1, which is an aluminum alloy brake disc body, and the brake The disc body 1 includes a brake outer disc 21 and a brake inner disc 22. The brake outer disc 21 and the brake inner disc 22 are connected by connecting ribs 23. The working surfaces of the brake outer disc 21 and the brake inner disc 22 are compounded with a wear-resistant layer 3 respectively. And 4, the preparation method of this ventilation brake disc comprises the following steps:

[0053] 1) Preparation of raw materials for the production of ceramic reinforcing materials: by volume fraction, weigh 5% of alumina short fibers, 10% of aluminum silicate short fibers, 10% of fly ash particles and 25% of low-temperature viscous Mixture and 50% high-temperature binder, the low-temperature binder is a carboxymethyl cellulose aqueous solution with a co...

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Abstract

The invention discloses an automobile brake disc which comprises a brake disc body. The brake disc body is made of aluminum alloy. The two work faces of the aluminum alloy brake disc body are each provided with an abrasion-resistant layer in a composite mode. The abrasion-resistant layers are made of a ceramic reinforcing material. The abrasion-resistant layers made of the ceramic reinforcing material are metallurgically combined with the aluminum alloy brake disc body through the squeeze casting technology. The brake disc is low in weight, good in abrasion resistance and cooling performance, long in service life, low in maintenance cost, and capable of reducing automobile oil consumption, improving the passage capacity of an automobile, shortening the brake distance and improving safety of the automobile. According to a manufacturing method of the brake disc, by means of selective local strengthening and the squeeze casting technology, the two work faces of the aluminum alloy brake disc body are each provided with one abrasion-resistant layer made of the ceramic reinforcing material in the composite mode, the abrasion-resistant layers made of the ceramic reinforcing material are metallurgically combined with the aluminum alloy brake disc body so that abrasion resistance of the work faces of the brake disc can be guaranteed, and raw material cost and machining cost of the brake disc are reduced.

Description

technical field [0001] The invention relates to a key part of an automobile brake system, in particular to an automobile brake disc and a preparation method thereof. Background technique [0002] Brake discs, also known as brake discs or brake discs, are the key safety components on a car. The brake disc brakes the wheels of the car through the friction between the brake disc and the brake pad, and is widely used in cars. In the process of driving, whether the brake disc can brake safely and reliably is very important. If the brake fails in an emergency, it will cause a safety accident, and even cause a car crash. Therefore, the requirements for brake discs are very strict. [0003] Historically, automobile brake discs at home and abroad are integrally cast with cast iron, which has good wear resistance and mechanical properties, mature casting technology, and can be formed into large and complex castings. The price is relatively low, and it is suitable for mass production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D65/12B22D19/00B22D18/02
Inventor 齐霖齐丕骧
Owner NINGBO HIGHRISE NEW MATERIAL CO LTD
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