Grinding unit for high speed train and preparation method of grinding unit

Abstract

The invention provides a grinding unit for a high speed train and a preparation method of the grinding unit. The grinding unit is composed of a friction material and a steel backing, wherein the friction material is composed of phenolic resins having specific physical properties, reinforced fibers, fillers and the like; the components of the friction material need to be pretreated such as mixing and drying; the steel backing needs to be pretreated such as abrasive blasting and resin glue spraying; the pretreated friction material and steel backing are subjected to special hot press molding, heat treatment and other processes, thereby obtaining the grinding unit. According to the grinding unit disclosed by the invention, by improving the thermal stability and enhancing the shock strength, the performance of the grinding unit in aspects such as metal inlaying, crack chipping, wheel shaping, friction noise and the like are improved, damage to the wheel tread is small, the phenomena such as hot cracks and severe wave furrowed abrasion are difficultly caused, and the grinding unit has important application value and wide market prospects in the field of high-speed trains.

Description

technical field

[0001] The invention relates to the field of manufacturing abrasives for train sets, in particular to grinders for high-speed train sets and a preparation method thereof. Background technique

[0002] With the continuous development of high-speed trains, higher requirements are put forward for train brakes, and more stringent requirements are put forward for the performance of brake friction materials: reliable work, good heat resistance and excellent comprehensive performance. The high-speed train tread cleaner is used to clean the tread, correct the shape of the wheel tread, eliminate the high-frequency vibration between the wheel and rail, suppress the wheel rotation noise, improve the adhesion between the wheel and the track, shorten the braking distance, and ensure the braking safety of the high-speed train. , stable and comfortable; at the same time, the use of grinders on the high-speed EMU bogie can eliminate fatigue cracks on the wheel surface in tim...

Examples

preparation example Construction

[0054] The invention provides a method for preparing a grinding wheel for high-speed EMUs, which includes the following steps: the selected raw materials are weighed, mixed, steel back surface treated, glue sprayed, hot-pressed and heat-treated according to the ratio, and the specific steps are as follows :

[0055] 1) Weighing:

[0056] According to the proportion of the raw material of the grinding sub, use an electronic scale with a suitable range and precision to accurately weigh the required amount of material; put different raw materials in different marked material boxes and make records for easy traceability.

[0057] 2) Mixing:

[0058] a) The present invention uses a rake type mixer for mixing, which can solve the problem of mixing uniformity of most asbestos-free mineral fibers and organic fibers with fillers, resins, and powdered rubber.

[0059] b) Put the prepared materials into the mixer, close the feed port; set the coulter to run for 20-25 minutes, and the h...

Embodiment 1

[0082] Embodiment 1, a kind of grinder for high-speed EMU and preparation method thereof

[0083] A grinding wheel for a high-speed EMU, the grinding wheel is composed of a steel back and a friction material, and the friction material includes the following raw materials and weight ratios, as shown in Table 1.

[0084] Table 1. Raw materials and weight ratio of friction materials

[0085] serial number

raw material

Weight ratio

1

Phenolic Resin

10％

2

Reduced iron powder

52％

3

petroleum coke

4.9％

4

Aluminum oxide

7％

5

copper fiber

17％

6

Calcium silicate whiskers

4％

7

Aramid fiber

4％

8

Calcium stearate

1％

9

Vermiculite

0.1％

[0086] The preparation method of a grinding wheel for a high-speed EMU includes the following steps: the selected raw materials are weighed according to the weight ratio, mixed, steel back surface treatment, glue sprayin...

Embodiment 2

[0099] Embodiment 2, a kind of grinder for high-speed EMU and preparation method thereof

[0100] A grinding wheel for a high-speed EMU, the grinding wheel is composed of a steel back and a friction material, and the friction material includes the following raw materials and weight ratios, as shown in Table 2.

[0101] Table 2. Raw materials and weight ratios of friction materials

[0102] serial number

raw material

Weight ratio

1

Phenolic Resin

9％

2

powdered nitrile rubber

4％

3

Reduced iron powder

58％

4

Vermiculite

2.5％

5

Aluminum oxide

4％

6

steel fiber

16.5％

7

wollastonite

3.5％

8

Aramid fiber

2％

9

Zinc stearate

0.5％

[0103] The preparation method of a grinding wheel for a high-speed EMU includes the following steps: the selected raw materials are weighed according to the weight ratio, mixed, steel back surface treatment, glue spraying, h...

technical field

[0001] The invention relates to the field of manufacturing abrasives for train sets, in particular to grinders for high-speed train sets and a preparation method thereof. Background technique

[0002] With the continuous development of high-speed trains, higher requirements are put forward for train brakes, and more stringent requirements are put forward for the performance of brake friction materials: reliable work, good heat resistance and excellent comprehensive performance. The high-speed train tread cleaner is used to clean the tread, correct the shape of the wheel tread, eliminate the high-frequency vibration between the wheel and rail, suppress the wheel rotation noise, improve the adhesion between the wheel and the track, shorten the braking distance, and ensure the braking safety of the high-speed train. , stable and comfortable; at the same time, the use of grinders on the high-speed EMU bogie can eliminate fatigue cracks on the wheel surface in tim...

Examples

preparation example Construction

[0054] The invention provides a method for preparing a grinding wheel for high-speed EMUs, which includes the following steps: the selected raw materials are weighed, mixed, steel back surface treated, glue sprayed, hot-pressed and heat-treated according to the ratio, and the specific steps are as follows :

[0055] 1) Weighing:

[0056] According to the proportion of the raw material of the grinding sub, use an electronic scale with a suitable range and precision to accurately weigh the required amount of material; put different raw materials in different marked material boxes and make records for easy traceability.

[0057] 2) Mixing:

[0058] a) The present invention uses a rake type mixer for mixing, which can solve the problem of mixing uniformity of most asbestos-free mineral fibers and organic fibers with fillers, resins, and powdered rubber.

[0059] b) Put the prepared materials into the mixer, close the feed port; set the coulter to run for 20-25 minutes, and the h...

Embodiment 1

[0082] Embodiment 1, a kind of grinder for high-speed EMU and preparation method thereof

[0083] A grinding wheel for a high-speed EMU, the grinding wheel is composed of a steel back and a friction material, and the friction material includes the following raw materials and weight ratios, as shown in Table 1.

[0084] Table 1. Raw materials and weight ratio of friction materials

[0085] serial number

raw material

Weight ratio

1

Phenolic Resin

10％

2

Reduced iron powder

52％

3

petroleum coke

4.9％

4

Aluminum oxide

7％

5

copper fiber

17％

6

Calcium silicate whiskers

4％

7

Aramid fiber

4％

8

Calcium stearate

1％

9

Vermiculite

0.1％

[0086] The preparation method of a grinding wheel for a high-speed EMU includes the following steps: the selected raw materials are weighed according to the weight ratio, mixed, steel back surface treatment, glue sprayin...

Embodiment 2

[0099] Embodiment 2, a kind of grinder for high-speed EMU and preparation method thereof

[0100] A grinding wheel for a high-speed EMU, the grinding wheel is composed of a steel back and a friction material, and the friction material includes the following raw materials and weight ratios, as shown in Table 2.

[0101] Table 2. Raw materials and weight ratios of friction materials

[0102] serial number

raw material

Weight ratio

1

Phenolic Resin

9％

2

powdered nitrile rubber

4％

3

Reduced iron powder

58％

4

Vermiculite

2.5％

5

Aluminum oxide

4％

6

steel fiber

16.5％

7

wollastonite

3.5％

8

Aramid fiber

2％

9

Zinc stearate

0.5％

[0103] The preparation method of a grinding wheel for a high-speed EMU includes the following steps: the selected raw materials are weighed according to the weight ratio, mixed, steel back surface treatment, glue spraying, h...

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