CN110821996A - A long-life friction material - Google Patents

Abstract

The invention discloses a long-life friction material, which relates to the related technical field of friction materials and comprises the following components in parts by weight: 75.5-86.3 parts of base material, 12.5-17.6 parts of friction modifier, 20.2-26.5 parts of adhesive, 20.3-40.5 parts of phenolic resin and 17.8-34.5 parts of lignin. The long-life friction material disclosed by the invention not only generates less noise in the braking process, but also has excellent braking performance, can ensure good wear resistance, and inhibits rust adhesion, thereby prolonging the service life.

Description

A long-life friction material

technical field

The invention belongs to the technical field of friction materials, in particular to a long-life friction material.

Background technique

In the field of motor vehicle braking, braking performance is related to vehicle safety. In the braking process, the braking distance has a huge impact on the safety; and the noise during braking also has an important impact on the driving comfort.

With the improvement of driving comfort, friction materials that generate little braking noise have been demanded in recent years, and a friction member using a friction material of NAO material is widely used, but these materials are sometimes used in the presence of water. Since the sulfuric acid particles that cause rust are dissolved, it is easy to rust on the disc rotor, which is the friction material of the disc brake, and the brake drum, which is the anti-abrasive material, which is the friction material of the drum brake. , and the noise resistance and braking performance are poor.

Based on the above-mentioned technical problems existing in the prior art, the present invention proposes a long-life friction material, which not only produces less noise during braking, but also has excellent braking performance, and solves the above-mentioned technical problems in the prior art .

SUMMARY OF THE INVENTION

(1) Technical problems solved

In view of the shortcomings of the prior art, the present invention provides a long-life friction material, which not only produces less noise during braking, but also has excellent braking performance, and can ensure good wear resistance and inhibit rust adhesion. , thereby improving the service life of the friction material and solving the technical problems existing in the background technology.

(2) Technical solutions

To achieve the above purpose, the present invention is achieved through the following technical solutions:

A long-life friction material, which comprises the following components and mass contents: 75.5-86.3 parts of base material, 12.5-17.6 parts of friction modifier, 20.2-26.5 parts of adhesive, 20.3-40.5 parts of phenolic resin, and 17.8-17.8 parts of lignin. 34.5 servings.

Optionally, the long-life friction material includes components and mass contents as follows: 75.5 parts of base material, 12.5 parts of friction modifier, 20.2 parts of adhesive, 20.3 parts of phenolic resin, and 17.8 parts of lignin.

Optionally, the long-life friction material includes components and mass contents as follows: 86.3 parts of base material, 17.6 parts of friction modifier, 26.5 parts of adhesive, 40.5 parts of phenolic resin, and 34.5 parts of lignin.

Optionally, the long-life friction material includes components and mass contents as follows: 80 parts of base material, 13.5 parts of friction modifier, 13.4 parts of adhesive, 30.2 parts of phenolic resin, and 23.5 parts of lignin.

Optionally, the components and mass contents included in the friction modifier are: 2.3-4.6 parts of calcium carbonate, 1.2-3.5 parts of barium sulfate, 0.3-0.74 parts of calcium hydroxide, 0.23-0.45 parts of iron sulfide, and 1.14-0.45 parts of copper sulfide. 3.58 parts, silicon oxide 0.35-0.78 parts.

Optionally, the friction modifier further includes 2.35-4.68 parts of iron powder and 1.22-2.54 parts of magnetic powder. The addition of the iron and magnetic powder can greatly improve the wear resistance of the friction material.

Optionally, the friction modifier includes 4.5-8.6 parts of metal powder, 0.75-0.94 parts of vermiculite and 1.12-2.78 parts of mica.

Optionally, the metal powder includes 2.58-4.56 parts of copper powder, 1.52-3.26 parts of aluminum powder and 0.45-0.85 parts of zinc powder.

Optionally, the friction modifier is integrated by heating, melting and compression molding; the heating temperature W1 is 1039-1186 degrees Celsius, and the heating time T1 is 15-28 minutes. After heating and melting, cooling to normal temperature, the friction modifier is made into powder, and then magnetic powder is added, and the specific surface area S of the powder is 650-846 m ² /g.

Optionally, in order to improve the wear resistance and service life of the friction material, the following relationship is satisfied between the heating temperature W1, the heating time T1 and the specific surface area S of the powder:

S=β·(W1/T1 ^1/2 );

Among them, β is the specific surface area coefficient, and the value range is 2.14-4.28.

Optionally, the adhesive is a high-strength adhesive; especially a mixed adhesive prepared from a water-soluble phenolic resin and an oil- and heat-resistant synthetic latex.

Optionally, the base material is steel, and the friction modifier, phenolic resin, lignin, and adhesive are uniformly mixed by mass fraction and then adhered to the base material.

Optionally, the present invention also discloses a long-life friction material production device, which includes a processing box, a motor, and a reciprocating screw. A cylinder is connected in the middle of the bottom of the processing box, an ejector rod is fixedly connected to one end of the cylinder, a fixing plate is fixedly connected to one end of the ejector rod, and limit rods are movably connected to both sides of the bottom of the inner cavity of the processing box. .

Both ends of the top of the processing box are movably connected with a reciprocating screw, the surface of the reciprocating screw is movably connected with a sliding block, one side of the sliding block is fixedly connected with a fixing seat, and one end of the fixing seat is fixedly connected There is a laser cutting head, polished rods are provided on both sides of the reciprocating lead screw, and both ends of the polished rod are fixedly connected with the inner wall of the processing box.

Both sides of the top of the fixing plate are provided with sliding grooves, and both sides of the bottom of the processing box are provided with sliding paths. The interior of the sliding path is fixedly connected with a support rod, and the surface of the support rod is movably connected with a compression rod. spring.

Optionally, a box cover is fixedly connected to one side of the processing box, and a handle is fixedly connected to the bottom of one side of the box cover.

Optionally, a motor is fixedly connected to both sides of the top of the back of the processing box, and one end of the reciprocating screw penetrates the processing box and is connected to one end of the motor.

Optionally, a protective cover is fixedly connected in the middle of the bottom of the processing box, and the top rod is located in the protective cover and is movably connected with the protective cover.

Optionally, the limiting rod is located in the chute and is movably connected with the chute; one end of the chute is located on the support rod and movably connected with the support rod, and the support rod is L-shaped.

Optionally, a threaded hole is formed in the middle of the sliding block, the reciprocating screw is located in the threaded hole and is threadedly connected with the middle of the sliding block; the polished rod is located on the sliding block and is movably connected with the sliding block.

Optionally, the reciprocating screw and the sliding block are made of tool steel, rolling bearing steel, carburized steel, nitrided steel, 45 steel, etc.; the hardness Y is 760-1020HV, and the elastic modulus E is 192-206GPa.

Optionally, in order to improve the accuracy of the screw drive, the hardness Y and the elastic modulus E satisfy the following relationship:

Y ^1/2 = α · E;

Among them, α is the relationship coefficient, and the value range is 0.14-0.16.

Optionally, in order to cut better and ensure the friction performance and long practical life of the friction material, the heating temperature W1, the heating time T1, the specific surface area S of the powder, and the hardness Y satisfy the following relationship:

W1/Y=γ·(S ^1/2 /T1);

Among them, γ is the relationship factor, and the value range is 0.54-1.71.

(3) Beneficial effects

Compared with the prior art, the long-life friction material of the present invention has the following beneficial effects and advantages:

(1) With the long-life friction material of the present invention, good wear resistance can be ensured, rust adhesion can be suppressed, and noise resistance and braking effect can be improved.

(2) The long-life friction material of the present invention can greatly improve the wear resistance of the friction material by providing iron powder, magnetic powder, etc.

(3) The long-life friction material of the present invention, by setting the range of the heating temperature W1, heating time T1 and the specific surface area S of the powder, and the relationship between them, not only produces less noise during braking , and excellent braking performance, can ensure good wear resistance, inhibit rust adhesion, thereby increasing the service life.

(4) For the long-life friction material of the present invention, by setting the range and relationship between the hardness Y and the elastic modulus E, the precision of the screw drive is improved, and the influence on the material properties during production is reduced.

(5) For the long-life friction material of the present invention, by setting the said heating temperature W1, heating time T1, the specific surface area S of the powder, and the hardness Y to satisfy the relationship, it is ensured that the noise generated during the braking process is small. , and excellent braking performance, can ensure good wear resistance, inhibit rust adhesion, thereby improving the service life and reducing the impact of production on material properties.

(5) For the long-life friction material of the present invention, the ejector rod can drive the fixed plate to move upward through the cylinder, which is convenient for the limit rod to fix the friction material on the fixed plate, and the reciprocating screw can drive the laser cutting head on the sliding block. The movement cuts the friction material.

Description of drawings

FIG. 1 is a diagram showing the composition and content of the long-life friction material of the present invention.

FIG. 2 is a schematic diagram of the long-life friction material production device of the present invention.

3 is a schematic cross-sectional front view of the processing box structure of the present invention.

FIG. 4 is a schematic side sectional view of the processing box structure of the present invention.

FIG. 5 is a schematic top view of the ejector pin of the ejector pin structure of the present invention.

In the figure: 1. Processing box; 2. Air cylinder; 3. Ejector rod; 4. Fixed plate; 5. Limit rod; 6. Reciprocating screw; 7. Slide block; 8. Fixed seat; 9. Laser cutting head; 10, polished rod; 11, chute; 12, slide; 13, support rod; 14, compression spring; 15, box cover; 16, motor; 17, protective cover; 18, support leg; 19, handle.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the present invention, unless otherwise expressly specified and limited, terms such as "arrangement", "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it may be a fixed connection or a It is a detachable connection, which can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Example 1:

As shown in Figure 1, a long-life friction material includes the following components and mass contents: 75.5-86.3 parts of base material, 12.5-17.6 parts of friction modifier, 20.2-26.5 parts of adhesive, and 20.3-40.5 parts of phenolic resin. parts, lignin 17.8-34.5 parts.

The components and mass contents included in the friction modifier are: calcium carbonate 2.3-4.6 parts, barium sulfate 1.2-3.5 parts, calcium hydroxide 0.3-0.74 parts, iron sulfide 0.23-0.45 parts, copper sulfide 1.14-3.58 parts, oxidized Silicon 0.35-0.78 parts.

The friction modifier includes 4.5-8.6 parts of metal powder, 0.75-0.94 parts of vermiculite and 1.12-2.78 parts of mica. The metal powder includes 2.58-4.56 parts of copper powder, 1.52-3.26 parts of aluminum powder, 0.45-0.85 parts of zinc powder, 2.35-4.68 parts of iron powder, and 1.22-2.54 parts of magnetic powder.

The friction modifier is integrated by heating, melting and compression molding; the heating temperature W1 is 1039-1186 degrees Celsius, and the heating time T1 is 15-28 minutes. After heating and melting, cooling to normal temperature, the friction modifier is made into powder, and then magnetic powder is added, and the specific surface area S of the powder is 650-846 m ² /g.

In order to improve the wear resistance and service life of the friction material, the following relationship is satisfied between the heating temperature W1, the heating time T1 and the specific surface area S of the powder:

S=β·(W1/T1 ^1/2 );

Among them, β is the specific surface area coefficient, and the value range is 2.14-4.28.

The adhesive is a high-strength adhesive; in particular, a mixed adhesive formulated from a water-soluble phenolic resin and an oil- and heat-resistant synthetic latex.

The base material is steel, and the friction modifier, phenolic resin, lignin, and adhesive are uniformly mixed by mass fraction, and then adhered to the base material.

Embodiment 2:

A long-life friction material comprises the following components and mass contents: 75.5 parts of base material, 12.5 parts of friction modifier, 20.2 parts of adhesive, 20.3 parts of phenolic resin, and 17.8 parts of lignin.

Embodiment three:

A long-life friction material, which comprises the following components and mass contents: 86.3 parts of base material, 17.6 parts of friction modifier, 26.5 parts of adhesive, 40.5 parts of phenolic resin, and 34.5 parts of lignin.

Embodiment 4:

A long-life friction material, which comprises the following components and mass contents: 80 parts of base material, 13.5 parts of friction modifier, 13.4 parts of adhesive, 30.2 parts of phenolic resin, and 23.5 parts of lignin.

Embodiment 5:

A long-life friction material, comprising the following components (by weight): 80 parts of friction modifier, 40 parts of adhesive, 40 parts of phenol resin, 18 parts of lignin, the friction modifier is composed of calcium carbonate, barium sulfate, hydroxide Calcium, iron sulfide, copper sulfide, silicon oxide, metal powders (such as copper, aluminum, bronze, and zinc), vermiculite, and mica.

The long-life friction material of the present invention can improve noise resistance and braking effect; and can ensure good wear resistance and inhibit rust adhesion, thereby increasing the service life of the friction material.

As shown in FIGS. 2-5 , the present invention also discloses a long-life friction material production device, including a processing box 1 , a motor 16 , and a reciprocating screw 6 . A box cover 15 is fixedly connected to one side of the processing box 1, a handle 19 is fixedly connected to the bottom of one side of the box cover 15, a motor 16 is fixedly connected to both sides of the top of the back of the processing box 1, and one end of the reciprocating screw 6 passes through. The processing box 1 is fixedly connected with one end of the motor 16. The motor 16 can provide power to the reciprocating screw 6 to make the reciprocating screw 6 rotate. The middle of the bottom of the processing box 1 is fixedly connected with a protective sleeve 17, and the ejector rod 3 is located in the protective sleeve 17. It is movably connected with the protective cover 17, and the protective cover 17 can avoid friction caused by the contact between the ejector rod 3 and the processing box 1 during the moving process.

The bottom four corners of the processing box 1 are fixedly connected with support legs 18, and the bottom middle of the processing box 1 is fixedly connected with a cylinder 2. The cylinder 2 can make the ejector rod 3 drive the fixed plate 4 to move upward, which is convenient for the limit rods 5 to be fixed. The friction material on the plate 4 is fixed, one end of the cylinder 2 is fixedly connected with the ejector rod 3, one end of the ejector rod 3 is fixedly connected with the fixed plate 4, and both sides of the bottom of the inner cavity of the processing box 1 are movably connected with the limit rod 5, which limits the The position rod 5 is located in the chute 11 and is movably connected with the chute 11. Both ends of the top of the processing box 1 are movably connected with a reciprocating screw 6. The reciprocating screw 6 can drive the laser cutting head 9 on the sliding block 7 to move to prevent friction. material for cutting.

The surface of the reciprocating screw 6 is movably connected with a sliding block 7, the middle of the sliding block 7 is provided with a threaded hole, the reciprocating screw 6 is located in the threaded hole and is threadedly connected with the middle of the sliding block 7, and one side of the sliding block 7 is fixed A fixed seat 8 is connected, and one end of the fixed seat 8 is fixedly connected with a laser cutting head 9. Both sides of the reciprocating screw 6 are provided with polished rods 10. The polished rods 10 can fix the position of the sliding block 7 to prevent the sliding block 7 from moving during the process. During the rotation, the polished rod 10 is located on the sliding block 7 and is movably connected with the sliding block 7 .

Both ends of the polished rod 10 are fixedly connected to the inner wall of the processing box 1, and both sides of the top of the fixed plate 4 are provided with chute 11. One end of the chute 11 is located on the support rod 13 and is movably connected with the support rod 13, supporting The rod 13 is in the shape of an L. There are slideways 12 on both sides of the bottom of the processing box 1. The inside of the slideway 12 is fixedly connected with a support rod 13, and the surface of the support rod 13 is movably connected with a compression spring 14. The support rod 13 and the compression spring 14 can limit the movement range of the limit rods 5 , so that the friction material is conveniently located between the four limit rods 5 .

The reciprocating screw and sliding block are made of tool steel, rolling bearing steel, carburized steel, nitrided steel, 45 steel, etc. The hardness Y is 760-1020HV, and the elastic modulus E is 192-206GPa.

In order to improve the accuracy of the screw drive, the hardness Y and the elastic modulus E satisfy the following relationship:

Y ^1/2 = α · E;

Among them, α is the relationship coefficient, and the value range is 0.14-0.16.

In order to cut better and ensure the friction performance and long practical life of the friction material, the heating temperature W1, the heating time T1, the specific surface area S of the powder, and the hardness Y satisfy the following relationship:

W1/Y=γ·(S ^1/2 /T1);

Among them, γ is the relationship factor, and the value range is 0.54-1.71.

working principle:

First move the limit rod 5, the limit rod 5 moves to compress the compression spring 14, place the friction material on the fixed plate 4, release the limit rod 5, the compression spring 14 resets and drives the limit rod 5 to move and reset, and then The cylinder 2 moves the fixed plate 4 upward through the ejector rod 3, so that the limit rod 5 fixes the friction material, and finally the motor 16 is started, and the motor 16 drives the laser cutting head 9 on the sliding block 7 through the reciprocating screw 6 to the fixed plate 4. cut the friction material.

It should be noted that, in the present invention, unless otherwise expressly specified and limited, the first feature "on" or "under" the second feature may be in direct contact with the first and second features, or the first and second features Features are indirectly contacted through an intermediary. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments can be modified, or some technical features thereof can be equivalently replaced, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included. within the protection scope of the present invention.

Claims (8)

1. a long-life friction material is characterized in that, the composition and mass content it comprises are: base material 75.5-86.3 parts, friction modifier 12.5-17.6 parts, adhesive 20.2-26.5 parts, phenolic resin 20.3-40.5 parts parts, lignin 17.8-34.5 parts. 2. A kind of long-life friction material according to claim 1 is characterized in that: it comprises the following components and mass content: 75.5 parts of base material, 12.5 parts of friction modifier, 20.2 parts of adhesive, 20.3 parts of phenolic resin , 17.8 parts of lignin. 3. A kind of long-life friction material according to claim 1 is characterized in that: it comprises the following components and mass content as follows: 86.3 parts of base material, 17.6 parts of friction modifier, 26.5 parts of adhesive, 40.5 parts of phenolic resin , 34.5 parts of lignin. 4. A kind of long-life friction material according to claim 1, is characterized in that: it comprises the following components and mass content: 80 parts of base material, 13.5 parts of friction modifier, 13.4 parts of adhesive, 30.2 parts of phenolic resin , 23.5 parts of lignin. 5. a kind of long-life friction material according to claim 1 is characterized in that: the composition and mass content that described friction modifier comprises are: calcium carbonate 2.3-4.6 parts, barium sulfate 1.2-3.5 parts, calcium hydroxide 0.3-0.74 part, iron sulfide 0.23-0.45 part, copper sulfide 1.14-3.58 part, silicon oxide 0.35-0.78 part. 6 . The long-life friction material according to claim 1 , wherein the friction modifier further comprises 4.5-8.6 parts of metal powder, 0.75-0.94 parts of vermiculite and 1.12-2.78 parts of mica. 7 . 7 . The long-life friction material according to claim 1 , wherein the metal powder comprises 2.58-4.56 parts of copper powder, 1.52-3.26 parts of aluminum powder and 0.45-0.85 parts of zinc powder. 8 . 8. The long-life friction material according to claim 1, wherein the adhesive is a high-strength adhesive.

Images