Heavy-duty vehicle disc brake pad and manufacturing process thereof

A disc brake pad and brake pad technology, applied in the field of brake pads, can solve problems such as failure, unstable braking performance, thermal recession, etc., and achieve the effects of stable friction coefficient, excellent mechanical performance, and stable insulation.

Active Publication Date: 2010-09-22
SHANDONG GOLD PHOENIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the large inertia of heavy-duty vehicles when they are fully loaded, obvious thermal fading often occurs during high-speed continuous braking, and the br

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] The preparation process of the disc friction plate provided by the present invention includes the steps:

[0044] Shears

[0045] Unwind the coil and level it, and cut it into a plate or a coil with a certain width. According to the corresponding car model, such as the slat size of the brake pads specified for heavy vehicles, select a plate of appropriate thickness and use a shearing machine to cut a slat of a certain width.

[0046] stamping;

[0047] According to the corresponding models, such as the corresponding molds for heavy vehicles and the appropriate tonnage of stamping equipment, the basic shape of the brake pad steel plate is punched out gradually, and it reaches a certain loading size and flatness requirements.

[0048] Degreasing

[0049] The water-based degreaser and water pass a certain proportion to reach a certain pH value (10-13), and heat it in the degreasing tank of the degreasing machine. After reaching a certain temperature (45~55℃), the degreasing operatio...

Example Embodiment

[0076] Example 1:

[0077] Base 12 kg polyether ether ketone, 6 kg steel wool fiber, 4 kg potassium titanate whisker, 8 kg cashew nut shell powder, 4 kg graphite, 4 kg aluminum powder, 4 kg antimony sulfide, 8 kg barite, refined chromium 4 kg of iron ore powder, 8 kg of kaolin and / or fluorite, and 6 kg of iron red. Weigh the raw materials of the brake pads according to the above ratio, put them into the mixer and mix them evenly, and then put them into the molding machine for hot pressing. The system pressure is 16MPa, the back pressure is 12MPa, and the holding time is 3min; the upper mold of the mold press 190℃, 195℃ for middle and lower mould. After curing treatment, 120°C for 5h, 150°C for 5h, 180°C for 5h, 200°C for 3h, a high-temperature-resistant heavy-duty disc brake pad is obtained. The friction coefficient is stable at 0.415~0.504 at 100-400℃, and the thermal decay is 4.76%. It has good heat recovery performance. The wear rate at 350℃ is 0.310×10 -7 cm 3 (N.m) -1 . ...

Example Embodiment

[0078] Example 2:

[0079] Matrix 17 kg polyether ether ketone, 12 kg steel wool fiber, 8 kg potassium titanate whisker, 16 kg cashew nut shell powder, 6 kg graphite, 6 kg aluminum powder, 6 kg antimony sulfide, 14 kg barite, refined chromium 6 kg of iron ore powder, 14 kg of kaolin and / or fluorite, and 8 kg of iron red. Weigh the raw materials of the brake pads according to the above ratio, put them in the mixer and mix them evenly, and then put them into the molding machine for hot compression molding. The system pressure is 14MPa, the back pressure is 12MPa, and the holding time is 4min; the upper mold of the mold press 160°C, 165°C for middle and lower molds. After curing treatment at 110℃×6h, 140℃×3h, 170℃×5h, 210℃×2h, a high temperature resistant heavy-duty disc brake pad is obtained. The friction coefficient is stable at 0.410~0.514 at 100-400℃, and the thermal decay is 4.66%, which has good heat recovery. The wear rate at 350℃ is 0.320×10 -7 cm 3 (N.m) -1 . Experiment...

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Abstract

The invention discloses a disc brake pad friction material, which is prepared from the following raw materials in percentage by weight: 12 to 17 percent of polyetheretherketone (PEEK) matrix, 6 to 12 percent of steel wool fiber, 4 to 8 percent of potassium titanate whisker, 8 to 16 percent of cashew nut shell powder, 4 to 6 percent of graphite, 4 to 6 percent of aluminum powder, 4 to 6 percent of antimony sulphide, 8 to 14 percent of barite, 4 to 6 percent of chromite fine powder, 8 to 14 percent of kaolin and/or fluorite and 6 to 8 percent of iron oxide red. In a manufacturing process, the polyetheretherketone of which the melting point is obviously higher than that of a normal resin is taken as a binder, and has the advantages of high temperature resistance, good self-lubricating property, corrosion resistance, flame retardant property, stripping resistance, radiation resistance, hydrolysis resistance and easy processing; and then a transfer film is formed on a friction surface in the brake process, and a cellular structure or a reticular structure that filler powder encircles the PEEK matrix is formed, so that the friction coefficient can be stabilized and the abrasion can be reduced through the formation of a surface film. The invention also discloses a disk brake pad and a manufacturing process thereof.

Description

technical field [0001] The invention relates to the technical field of brake pads, in particular to a heavy-duty vehicle disc brake pad and a manufacturing process thereof. Background technique [0002] Brake pads, also called brake pads, are the most critical safety parts, and the brake pads play a decisive role in the quality of all braking effects. [0003] With the development of heavy-duty vehicles, this requires that the brake pads have better high-temperature resistance characteristics under full load, and the material configuration of heavy-duty vehicle brake pads is the main factor affecting the high-temperature resistance and wear resistance of brake pads. [0004] Due to the large inertia of heavy-duty vehicles when they are fully loaded, obvious thermal fading often occurs during high-speed continuous braking, and the braking performance is unstable, resulting in smoke and fire from the brake pads, causing brake failure. Serious threat to the safety of pedestria...

Claims

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Application Information

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IPC IPC(8): C09K3/14F16D69/02B29C51/46B29C35/02C08L71/08C08K13/04C08K3/04C08K7/08
Inventor 孙忠义王春雨徐伟
Owner SHANDONG GOLD PHOENIX
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