KR100671784B1 - Friction Pad for Brake System and Method for Manufacturing the Same - Google Patents

Abstract

The present invention relates to a friction pad for a brake system and a method of manufacturing the friction pad. In particular, after the friction material is first bonded to the connecting flange by sintering, the connecting flange is fixed to the back plate or a friction material is inserted into the connecting flange and the back plate The present invention relates to a friction pad for a brake system and a method of manufacturing the friction pad, which are bonded together by sintering to prevent deformation of the back plate and maintain the flatness of the surface of the friction material, thereby securing an initial braking force.

Brake system, Friction pad, Anti-deformation, Joint strength

Description

Technical Field [0001] The present invention relates to a friction pad for a brake system,

1 shows a top view of a friction pad for a brake system according to a first embodiment of the present invention.

Fig. 2 shows a vertical sectional view taken along the line A-A in Fig.

3 shows a top view of a friction pad for a brake system according to a second embodiment of the present invention.

4 is a vertical sectional view taken along the line B-B in Fig.

Figure 5 shows a top view of the connecting flange.

6 is a vertical sectional view taken along the line C-C of Fig.

7 shows a manufacturing process of a friction pad for a brake system according to an embodiment of the present invention.

8 shows another manufacturing process of a friction pad for a brake system according to an embodiment of the present invention.

9 shows another manufacturing process of the friction pad for a brake system according to the embodiment of the present invention.

Description of the Related Art

100, 200 - Friction pads for brake system

110, 210 - back plate 120, 220 - connecting flange

222 - Base plate 124, 224 - Joint

126 - Coupling portion 128 - Support

130, 230 - friction material 140, 240 - dovetail

The present invention relates to a friction pad for a brake system and a method of manufacturing the friction pad. More particularly, the present invention relates to a friction pad for a brake system, and more particularly to a friction pad for a brake system, The present invention relates to a friction pad for a brake system and a method of manufacturing the friction pad, which are capable of securing an initial braking force by preventing the back plate from being deformed and maintaining the flatness of the surface of the friction material.

Generally, a friction pad used for an aircraft or a railway vehicle having a large kinetic energy is formed by including a friction member having a predetermined shape and a back plate as a fixing member for fixing the friction member. The friction member is in direct contact with the rotating means of the aircraft or the railway vehicle, and brakes the rotating means by frictional force. Therefore, since the kinetic energy of an aircraft or a railway vehicle is large, the friction pad must braking the rotating means with a greater frictional force in order to braking during traveling, and wear resistance and durability are required along with large frictional force. Also, the friction member should be made of a material capable of rapidly changing the characteristics even when the temperature rises due to heat generated during friction, and capable of rapidly discharging heat generated during friction to the outside.

Recently, a sintered friction material is used as the friction material, and a metallic material such as copper or iron is used as a base, and a non-metallic material such as ceramic or graphite or metal is dispersed to adjust the friction characteristics of the friction material. Therefore, the friction pad has excellent friction performance according to heat resistance, thermal conductivity, mechanical strength, and friction characteristics of the nonmetallic material of the metal material constituting the sintered friction material.

Such a friction pad is formed by bonding a friction member of a predetermined shape made of a sintered metal to a back plate. At this time, the friction member is formed and sintered in a predetermined shape in advance, and is joined to the back plate by fusion welding or brazing. However, the back plate is deformed by the heat generated in the melting welding process in the process of the friction member being joined to the back plate by the fusion welding. Therefore, when the back plate is deformed, the flatness of the friction material is lowered, and a polishing process for the surface of the friction member must be added. When the flatness of the friction member is lowered, the contact area with the rotating means on which the friction member is contacted becomes small, and there is a problem in securing the initial braking force.

Further, when the friction member is coupled to the back plate by brazing, the coupling force of the brazing is lowered due to the heat generated when the friction member is in contact with the rotating means, and the friction member is detached from the back plate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a friction stir welding tool, in which a friction material is firstly bonded to a connection flange by sintering, The present invention also provides a friction pad for a brake system and a method of manufacturing the friction pad, which can prevent the deformation of the back plate and maintain the flatness of the surface of the friction material, thereby securing an initial braking force.

The present invention also relates to a friction material for a brake system capable of increasing a bonding strength of a friction material because a friction material is bonded to a connection flange coupled to a back plate to prevent deformation of the back plate in the sintering process, Pad and a method for producing the same.

In order to solve the above problems, the friction pad for a brake system according to the present invention has a plurality of frictional members formed in a columnar shape with a predetermined height, A plurality of connection flanges having a plurality of connection flanges arranged at predetermined intervals in a plate shape and connected to the coupling portions; and a plurality of coupling flanges coupled to the bottom surface of the back plate, And a dovetail coupled to the brake system for securing the friction pad. In this case, the connection flange may further include a support portion horizontally formed in an area between the lower end of the joint portion and the coupling portion. The coupling portion may have a circular shape having a predetermined area, a through hole may be formed in a central region thereof, and may be coupled to the backplate by riveting or spot welding through the through hole. In addition, the connection flange may be formed with a plating layer in a region including a region in contact with the friction material. The back plate may have a plating layer formed on a region including a region contacting the friction material, and a plating layer may be formed on a region including a region contacting the coupling flange.

The friction pad for a brake system according to the present invention includes a plurality of friction materials formed in a columnar shape with a predetermined height, a base plate formed in a plate shape having a predetermined area and shape, A connecting flange formed in a tubular shape and including a plurality of joints to which the lower portion of the friction material is inserted and joined; a back plate coupled to the upper surface of the connecting flange by spot welding in a plate shape corresponding to the connection flange; A backplate coupled to the lower surface, and a dovetail coupled to the brake system to secure the friction pad. At this time, a plating layer may be formed on an area including the area where the connection flange is in contact with the friction material, and a plating layer may be formed on an area including the area where the connection flange is in contact with the back plate.

A method of manufacturing a friction pad for a brake system according to the present invention includes a friction material forming step of forming a friction material into a predetermined shape, a friction material bonding step of bonding the friction material to the connection flange by sintering, A dovetail bonding process with a back plate for joining the dovetail by spot welding, and a joining flange and a back plate joining the joining flange and the back plate by riveting or spot welding.

According to another aspect of the present invention, there is provided a method of manufacturing a friction pad for a brake system, comprising: a friction material forming step of forming a friction material into a predetermined shape; a coupling flange and a back plate coupling step of joining the coupling flange and the back plate by spot welding; And a back plate and a dovetail joining process in which the friction material is joined to the coupling flange and the back plate by a sintering process, the coupling flange joining process, and the back plate and the dovetail are combined by spot welding.

A method of manufacturing a friction pad for a brake system according to the present invention includes a friction material forming process for molding a friction material into a predetermined shape, a coupling flange and a back plate coupling process for coupling the coupling flange and the back plate by spot welding, A dovetail joining process with a back plate for joining the plate and the dovetail by spot welding, and a joining flange joining process in which the friction material is joined to the joining flange and the back plate by the sintering process.

At this time, a plating layer may be formed on an area where the connection flange is in contact with the friction material or the back plate, and a plating layer may be formed on an area including a region where the back plate contacts the coupling flange or the friction material. In addition, the sintering process preferably proceeds by a pressurizing and sintering process which proceeds at a predetermined sintering temperature and a predetermined sintering pressure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 shows a top view of a friction pad for a brake system according to a first embodiment of the present invention. Fig. 2 shows a vertical sectional view taken along the line A-A in Fig.

1 and 2, the friction pad 100 for a brake system according to the first embodiment of the present invention includes a back plate 110, a coupling flange 120, a friction material 130, and a dovetail 140 .

The back plate 110 is formed in a substantially plate-like shape with a predetermined thickness and is made of a metal material. The back plate 110 may have an area and a thickness required by the brake system to be mounted and may have an appropriate area according to the number of the friction materials 130 fixed to the upper surface. Also, the back plate 110 may be formed of a suitable metal material according to the required mechanical strength.

In addition, a plating layer such as a copper plating layer or a nickel plating layer may be formed on the back plate 110 in a region including a predetermined area on one side where the friction material 130 is coupled. The plating layer increases the bonding strength between the friction material 130 and the back plate 110 when the friction material 130 contacts and sinter together with the back plate 110. The plating layer may preferably be formed to a thickness of 5 탆 to 30 탆.

The connection flange 120 has a joint portion 124 formed in a cylindrical shape having a predetermined height opened at an upper portion and a lower portion and a coupling portion 126 extending at a predetermined angular interval and outwardly from the lower portion of the joint portion 124 . The connection flange 120 may include a support portion 128 extending outward from the region between the engaging portions 126 under the joint portion 124 by a predetermined width. The coupling portion 126 and the support portion 128 are formed to extend in a substantially horizontal direction parallel to the surface of the back plate when the connection flange is coupled to the back plate. The coupling flange 120 is fixedly coupled to one surface of the back plate 110 by riveting or spot welding.

The connection flange 120 is formed in a quantity corresponding to the quantity of the friction material 130 necessary for ensuring the frictional force required for braking in an aircraft or a railroad car.

The connection flange 120 is formed with a plating layer in a region including a surface where the bonding portion 124 and the friction material 130 are in contact with each other. The plating layer increases the bonding strength between the friction material 130 and the bonding portion 124 in the process of sintering the friction material 130. The plating layer may be formed of a plating layer of various components such as a copper plating layer and a nickel plating layer, depending on the components of the friction material 130. For example, when the base of the friction material 130 is formed of copper, it is preferable that the plating layer is formed of a copper plating layer. The plating layer may preferably be formed to a thickness of 5 to 30 占 퐉.

The joining portion 124 is formed in a substantially cylindrical shape and is formed to have a height smaller than the height of the friction material 130. The abutment 124 is preferably formed to a height less than 25% of the total height of the friction material 130. The joining portion 124 is inserted with a molded friction material 130 and the connecting flange 120 is sintered together with the friction material 130. Accordingly, the joint 124 is joined to the friction material 130 on the inner surface and the upper surface. At this time, when the plating layer is formed to have a predetermined thickness on the surface, particularly the inner surface and the upper surface, the bonding portion 124 can be more strongly bonded to the friction material 130 on the inner surface and the upper surface as described above.

The joint 124 may be formed in a variety of shapes corresponding to the shape of the friction material, such as a rectangular column or a triangular column having open top and bottom in addition to the cylindrical shape.

The abutment 124 preferably has a rounded or chamfered inner edge at the top. Since the friction member 130 receives a force in a direction perpendicular to the axial direction of the joint portion 124 in the braking process, when the edge portion of the joint portion 124 is formed in a sharp manner, the load is concentrated on the corner portion, It can be partially damaged. Therefore, it is preferable that the edge portion of the bonding portion 124, which is in contact with the friction material 130, is round or chamfered.

The engaging portion 126 extends horizontally from the lower end of the joining portion 124 to a predetermined area and is formed integrally with the joining portion 124. The coupling part 126 may be separately formed and welded to the lower part of the joint part 124 by welding or the like. The engaging portions 126 are formed at predetermined angular intervals in the outer region of the joint portion 124, and are formed of at least two, preferably three. That is, the engaging portions 126 are preferably formed of three pieces, and are disposed at intervals of 120 degrees from the outer periphery of the joint portion 124.

The coupling part 126 is coupled to the back plate 110 by the rivet 10 to fix the connection flange 120 to the back plate 110. Accordingly, the engaging portion 126 is formed in a substantially plate-like shape having a predetermined area required for riveting, and is preferably formed in a substantially circular plate shape. Also, the engaging portion 126 is formed with a through hole 126a for riveting in a substantially central region when the connecting flange 120 is coupled by riveting.

The engaging portion 126 may be coupled to the back plate 110 by welding such as spot welding instead of rivet. In this case, no through hole 126a is formed in the engaging portion 126. [

A plating layer may be formed on the bottom surface of the coupling part 126, which is in contact with the back plate 110. When the engaging portion 126 of the connecting flange is first welded to the back plate 110 by spot welding and the friction material 130 is engaged and sintered to the welding portion 124, (110) to be more firmly coupled.

The support portion 128 extends horizontally outwardly from a region between the engaging portions 126 formed at the lower end of the joint portion 124. Thereby increasing the contact area between the connection flange 120 and the back plate 110 to support the connection flange 120. The support portion 128 supports the connecting flange 120 at the lower portion of the abutment portion 124 when the friction material 130 coupled to the abutment portion 124 is urged in a substantially horizontal direction during the friction process. Needless to say, the support portion 128 may not be formed when the number of the coupling portions 126 is large or the coupling flange 120 is firmly supported by other means.

A plating layer may be formed on the bottom surface of the support portion 128, which is in contact with the back plate 110. When the connecting flange 120 is first welded to the back plate 110 by spot welding and the friction material 130 is bonded to the bonding portion 124 and sintered, the plating layer may be formed between the supporting portion 128 and the back plate 110 So that they can be more firmly coupled.

The friction material 130 is formed into a columnar shape with a predetermined height having various shapes including a circular or square cross section, and is preferably formed into a cylindrical shape that is easy to be formed. However, the shape of the friction material 130 is not limited thereto, and may be formed in various shapes including square columns and triangular columns. The friction material 130 is formed at a predetermined height according to the specification of the brake system and the replacement period of the friction pads.

The friction material 130 is joined to the inner surface and the upper surface of the joint portion 124 in the sintering process. The friction material 130 is preferably sintered and bonded by a pressure sintering process in which a predetermined temperature and pressure are simultaneously applied. Accordingly, the friction material 130 is engaged with the connection flange 120 and fixed to the back plate 110. The friction material 130 is preferably formed in a lower portion so as to form a step to be engaged with an upper portion of the joint portion 124 of the connection flange, and the step portion is engaged with the upper portion of the joint portion 124.

Since the friction material 130 is first formed at a predetermined height and then inserted into the joint portion 124 and sintered, the friction material 130 is finally formed at a height reduced by a predetermined amount from the height at the time of molding. The shrinkage height of the friction material 130 may vary depending on the composition of the friction material 130, the molding conditions, and the sintering conditions. Further, the friction material 130 is preferably formed to have an outer diameter substantially equal to the outer diameter of the abutment portion 124. More specifically, the friction material 130 is formed integrally with the connection flange 120, and is formed to have an outer diameter substantially equal to the outer diameter of the joint portion 124. The friction material 130 is partially shrunk or expanded depending on the components of the friction material during the sintering process, so that the outer diameter becomes larger or smaller.

When the friction material 130 is joined to the coupling flange 120, the lower surface of the friction material 130 is substantially planar with the lower surface of the coupling flange 120 and is engaged with the upper surface of the back plate 110.

The friction material 130 is formed by including a base portion formed of a metal material and a friction adjusting agent dispersed in the base portion and including a non-metal such as ceramic or graphite. The known portion of the friction material 130 may be formed of a ferrous material having iron as its main component or a copper material having copper as its main component. The known part may be formed of iron such as Ni, Mn, and Mo in addition to Fe. In addition, the known portion may be formed of copper (Cu) and other components such as tin (Sn), nickel (Ni), iron (Fe), and molybdenum (Mo) Therefore, the known portion can be selectively used in consideration of various characteristics such as friction characteristics, heat resistance, durability, and the like required for a friction pad for a brake system, and the present invention is not limited thereto.

The friction modifier of the friction material 130 includes a material such as ceramic and graphite such as alumina and silicon oxide. Various materials such as friction material, heat resistance, and durability required for a friction system for a brake system, , And is not limited to the components of the friction modifier.

The dovetail 140 is formed on the lower surface of the back plate 110, that is, on the opposite side of the surface where the connection flange 120 is fixed. The dovetail 140 may be formed in various shapes according to the specification of the brake system in which the friction pad is used, and the shape of the dovetail 140 is not limited thereto. The dovetail 140 may be coupled to the back plate 110 by various methods such as welding, riveting, and brazing, including melt welding and spot welding, preferably by spot welding.

3 shows a top view of a friction pad for a brake system according to a second embodiment of the present invention. 4 is a vertical sectional view taken along the line B-B in Fig. Figure 5 shows a top view of the connecting flange. 6 is a vertical sectional view taken along the line C-C of Fig.

3 to 6, a friction pad 200 for a brake system according to a second embodiment of the present invention includes a back plate 210, a connection flange 220, a friction material 230, and a dovetail 240 . Here, the friction pad 200 for the brake system according to the second embodiment will be described mainly about a portion different from the friction pad 100 for the brake system according to the first embodiment.

The back plate 210 is formed in a substantially plate-like shape having a predetermined thickness and is made of a metal material. The back plate 210 is formed to have a shape and an area required by the brake system to be mounted or an appropriate area according to the quantity of the friction material 230 coupled to the upper surface.

As described above, a plating layer such as a copper plating layer or a nickel plating layer may be formed on one surface of the back plate 210 to which the friction material 230 is coupled. The plating layer increases the bonding strength between the friction material 130 and the back plate 110 when the friction material 230 is sintered together with the back plate 210.

The coupling flange 220 has a base plate 222 formed in a substantially plate-like shape corresponding to the back plate 210, upper and lower openings, and the friction material 230 is disposed at a predetermined position of the base plate 222 And a plurality of joining portions 224 to be inserted and joined. The connection flange 220 is coupled to the upper surface of the back plate 210 by a spot weld 20 to couple the friction member 230 to the back plate 210.

The connection flange 220 is formed with a plating layer in a region including a surface where the bonding portion 224 and the friction material 230 are in contact with each other and increases the bonding strength with the friction material 230 by the plating layer. In addition, a plating layer may be formed on the connection flange 220 in a region contacting the back plate 210. The plating layer of the connection flange 220 may be formed of a plating layer of various components such as a copper plating layer and a nickel plating layer depending on the components of the friction material 230.

The joining portion 224 is formed in a cylindrical shape having a predetermined height opened at the top and bottom, and is formed at a height smaller than the height of the friction material 230. The abutment 224 is preferably formed to a height less than 25% of the total height of the friction material 230. The friction material 230 is inserted into the joint portion 224 to be coupled therewith. That is, the joining portion 224 is sintered together with the friction material 230 inserted into the joining portion 224, and the friction material 230 is joined to the inner surface and the upper surface of the joining portion 224. The joining portion 224 is preferably integrally formed with the base plate 222 and may be separately formed and coupled to the base plate 222 by welding or the like.

The joint 224 may be formed in a variety of shapes corresponding to the shape of the friction material, such as a rectangular column or a triangular prism, which is open at the top and bottom in addition to the cylindrical shape.

The friction material 230 is formed by including a base portion formed of a metal material and a friction adjusting agent dispersed in the base portion and including a non-metal such as ceramic or graphite. Further, the friction material 230 is fixed to the back plate 210 by being engaged with the connection flange 220. Since the constituent components of the friction material 230 have been described above, detailed description thereof will be omitted here.

 The friction material 230 is formed into a columnar shape having various shapes including a circular or square cross section, and is preferably formed into a cylindrical shape that is easy to be formed. The friction material 230 is inserted into the joining portion 224 and sintered together with the coupling flange 220 and bonded to the joining portion 224 to be fixed to the back plate 210. At this time, when the plating layer is formed on the inner surface and the upper surface of the bonding portion 224, the bonding strength is increased.

The lower surface of the friction material 230 may be joined to the back plate 210. That is, when the connection flange 220 and the back plate 210 are first coupled and the friction material 230 is inserted into the connection flange 220 and the sintering process proceeds, the friction material 230 is connected to the back plate 210 Are simultaneously bonded to the flange 220. The friction material 230 is preferably sintered and bonded by a pressure sintering process in which a predetermined temperature and pressure are simultaneously applied. Accordingly, the friction material 230 can be prevented from being detached from the back plate 210 or the connecting flange 220 in the braking process of the friction pad due to the increased bonding strength.

Since the dovetail 240 has been described above, a detailed description thereof will be omitted.

Next, a method of manufacturing a friction pad for a brake system according to the present invention will be described.

7 shows a manufacturing process of a friction pad for a brake system according to an embodiment of the present invention.

Referring to FIG. 7, a method of manufacturing a friction pad for a brake system according to an embodiment of the present invention includes a friction material forming process S110, a friction material joining flange joining process S120, a back plate and dovetail joining process S130, And a coupling process (S140) of the coupling flange and the back plate. In this case, it is needless to say that the procedure of joining the friction material with the friction material (S120) and the process of joining the back plate and the dovetail (S130) may be reversed. Also, the coupling process (S130) between the back plate and the dovetail may be performed after the coupling flange-back plate coupling process (S140).

The friction material forming process (S110) is a process of molding the friction material used in the friction pad for a brake system into a predetermined shape. In the friction material forming process (S110), powder mixed with a predetermined component is formed into a predetermined shape of a friction material at a predetermined molding pressure using a molding press. The forming pressure may be variously set according to the constituent components of the friction material, the required density of the friction material, and the like. As described above, the friction material is preferably formed in a cylindrical shape having a step portion corresponding to the upper portion of the joint portion at the lower portion thereof.

The joining process (S120) of joining the friction material with the joining flange is a process of joining the joining flange with the friction material by inserting and sintering the formed joining flange. The friction material is inserted into the joint portion of the connection flange, and the friction material and the connection flange are mounted on a jig of a predetermined shape, charged into the sintering furnace, and sintered. The friction material preferably proceeds in a pressure sintering mode in which a predetermined sintering temperature and a predetermined sintering pressure are applied for a predetermined time. In the sintering process, the sintering temperature may range from 820 to 1000 ° C, and the sintering pressure may range from 0 to 50 kg / cm 2. However, the sintering temperature, the sintering pressure, and the sintering time of the sintering process can be appropriately selected according to the type of the friction material, the characteristics of the friction material, and the like. The friction material and the connecting flange are strongly bonded to each other by sintering. At this time, if a plating layer is formed on the inner surface and the upper surface of the joint portion, it can be bonded more strongly by the action of the plating layer. In addition, the friction material is reduced in height by a predetermined amount during the sintering process.

The dovetail bonding process (S130) with the back plate is a process of bonding the dovetail to the bottom surface of the back plate. The dovetail is joined to a predetermined position of the back plate by various methods including fusion welding, spot welding, riveting and brazing, and is preferably bonded by spot welding or fusion welding. When the dovetail is not formed on the friction pad for the brake system, it is needless to say that the coupling process of the back plate and dovetail (S130) may be omitted.

The coupling flange and back plate coupling process (S140) is a process of coupling the coupling flange to which the friction material is joined to the back plate. The connecting flange is joined to the connecting portion by a friction material and is coupled to the back plate by a predetermined method according to the shape of the connecting flange. That is, the friction pad 100 for the brake system according to the first embodiment is preferably combined with the back plate 110 and the connecting flange 120 by riveting. The connection flange 120 is formed to be relatively small so that a large number of connection parts with the back plate 110 can be deformed during the coupling process of the back plate 110 and the connection flange 120. Accordingly, the back plate 110 and the coupling flange 120 are combined by the riveting having less deformation, thereby minimizing deformation of the back plate 110 and the coupling flange 120. Also, the friction pad 200 for a brake system according to the second embodiment is preferably combined with the back plate 210 and the connecting flange 220 by spot welding. Since the connecting flange 220 is integrally formed with a size corresponding to the back plate, the joining portion is relatively small and the deformation is small even when the joining is performed by spot welding.

8 shows another manufacturing process of a friction pad for a brake system according to an embodiment of the present invention.

Referring to FIG. 8, a friction pad for a brake system according to an exemplary embodiment of the present invention includes a friction material forming process S210, a coupling flange and back plate coupling process S220, a friction material coupling flange bonding process S230, Can be manufactured by a dovetail bonding process (S240). In this case, it is needless to say that the sequence of the friction material forming process (S210) and the connecting flange and the back plate coupling process (S220) may be changed. The manufacturing method of the friction pad for a brake system disclosed in FIG. 8 can be applied to both the first and second embodiments described above. Hereinafter, the manufacturing method as a whole without distinguishing between the first embodiment and the second embodiment Explain.

Since the friction material forming process S210 is similar to the friction material forming process S110 of FIG. 7, detailed description thereof will be omitted.

The coupling flange and back plate coupling process (S220) is a process of joining the coupling flange and the back plate by spot welding or riveting. That is, the connecting flange is joined to the back plate by spot welding or riveting before being joined to the friction material. In the friction pad 100 for a brake system according to the first embodiment, the connecting flange 120 and the back plate 110 can be combined by riveting or spot welding, and the friction pad 100 for a brake system according to the second embodiment The connecting flange 220 and the back plate 210 may be joined by spot welding. On the other hand, when the connecting flange is joined to the back plate by spot welding, the back plate may be partially deformed, but deformation of the back plate may be removed in the sintering process as described below.

The friction material joining process (S230) with the friction material is a process of joining the friction material to the coupling flange to which the back plate is coupled. That is, the friction material is inserted into the joint of the connection flange and sintered together with the connection flange and the back plate. The sintering of the friction material preferably proceeds in a pressure sintering manner. In the sintering process, the sintering temperature may range from 820 to 1000 ° C, and the sintering pressure may range from 0 to 50 kg / cm 2. Therefore, in this case, the friction material is simultaneously bonded to the connection flange and the back plate, so that the bonding strength is increased. Further, the connection flange and the back plate may be formed with a plating layer in a region where the coupling flange and the back plate are joined to the friction material. In this case, the bonding strength of the friction material can be further increased. Meanwhile, the back plate and the connecting flange can be partially deformed during the spot welding process in the joining process (S220) of the connecting flange and the back plate. However, in the sintering process proceeding at high temperature and high pressure, the proper sintering jig is used to correct the deformation .

The dovetail bonding process (S240) with the back plate is a process of bonding the dovetail to the lower surface of the back plate. The dovetail is coupled to a predetermined position of the back plate and is joined by fusion welding or spot welding. At this time, a friction material and a coupling flange are fixed to the upper part of the back plate. It is needless to say that in the case where the dovetail is not formed in the friction pad for the brake system, the coupling process of the back plate and the dovetail (S240) may be omitted.

9 shows another manufacturing process of the friction pad for a brake system according to the embodiment of the present invention.

9, a friction pad for a brake system according to an embodiment of the present invention includes a friction material forming process S310, a coupling flange and backplate coupling process S320, a back plate and dovetail coupling process S330, Flange bonding process (S340). In this case, the order of the friction material forming process (S310), the connecting flange and back plate combining process (S320), the back plate and the dovetail joining process (S330) may be reversed. The manufacturing method of the friction pad for a brake system disclosed in FIG. 9 can be applied to both the first and second embodiments described above. Describe the whole.

Since the friction material forming process S310 is similar to the friction material forming process S110 of FIG. 7, a detailed description thereof will be omitted.

The coupling flange and back plate coupling process (S320) is a process of joining the coupling flange and the back plate by spot welding or riveting. That is, the connecting flange is joined to the back plate by spot welding or riveting before being joined to the friction material. In the friction pad 100 for a brake system according to the first embodiment, the connecting flange 120 and the back plate 110 can be combined by riveting or spot welding, and the friction pad 100 for a brake system according to the second embodiment The connecting flange 220 and the back plate 210 may be joined by spot welding. On the other hand, when the connecting flange is joined to the back plate by spot welding, the back plate may be partially deformed, but deformation of the back plate may be removed in the sintering process as described below.

The dovetail bonding process (S330) with the back plate is a process of bonding the dovetail to the bottom surface of the back plate. The dovetail is coupled to a predetermined position of the back plate and is joined by fusion welding or spot welding. At this time, the back plate is fixed to the upper part only with the connection plan. When the dovetail is not formed on the friction pad for the brake system, it is needless to say that the coupling process of the back plate and dovetail (S330) may be omitted.

The joining process of joining the friction material with the friction material (S340) is a process of joining the friction material to the back plate coupled with the dovetail and the joining flange. That is, the friction material is inserted into the joint portion of the connection flange, the side surface is contacted with the connection flange, and the lower surface is contacted with the back plate and sintered. In the sintering process, the sintering temperature may range from 820 to 1000 ° C, and the sintering pressure may range from 0 to 50 kg / cm 2. Therefore, in this case, the friction material is simultaneously bonded to the connecting flange and the back plate, so that the bonding strength is increased. Further, the connection flange and the back plate may be formed with a plating layer in a region where the coupling flange and the back plate are joined to the friction material. In this case, the bonding strength of the friction material can be further increased. Meanwhile, the back plate and the connecting flange can be partially deformed during the spot welding process of the joining process of the connecting flange and the back plate (S320). However, when the sintering is carried out at a high temperature and a high pressure by using a press sintering method, I can correct it. Also, the back plate is welded to the lower surface of the friction material before sintering. Accordingly, when the back plate is deformed during the welding process of the dovetail, it can be corrected. That is, by using an appropriate sintering jig capable of supporting the back plate and the dovetail at the same time during the pressing and sintering of the friction material, the deformation of the back plate and the dovetail can be corrected.

As described above, the present invention is not limited to the above-described specific preferred embodiments, and any person skilled in the art may apply the present invention without departing from the gist of the present invention. It is to be understood that various changes and modifications may be practiced within the scope of the appended claims.

According to the friction pad for a brake system and the method of manufacturing the friction pad for a brake system according to the present invention, since the friction material is first bonded to the connection flange and then the connection flange is fixed to the back plate, deformation of the back plate is prevented to maintain the flatness of the surface of the friction material, There is an effect that can be secured.

Further, according to the present invention, since the friction material is bonded to the connection flange coupled to the back plate, deformation of the back plate can be prevented in the sintering process and the friction material can be bonded to the back plate at the same time, have.

Claims (15)

 A plurality of friction materials formed in a columnar shape with a predetermined height; A plurality of connection flanges each having an upper and a lower portion opened and formed at a height smaller than the height of the friction material and having a cylindrical joint portion into which the friction material is inserted and joined and at least two coupling portions formed outwardly from the lower end of the joint portion; A plurality of connecting flanges arranged at predetermined intervals in a plate shape, a lower surface of the friction material and a lower surface of the engaging portion contacting the upper surface, A dovetail coupled to a bottom surface of the backplate, Wherein the coupling flange is formed with a through hole in a central region of the coupling portion and is riveted to the back plate through the through hole. The method of claim 1, further comprising: Wherein the connection flange further comprises a support portion formed horizontally in an outward direction in an area between the lower end of the joint and the engaging portion. delete delete The method according to claim 1, Wherein the connection flange is formed with a plated layer in an area including an area in contact with the friction material. The method according to claim 1, Wherein the back plate is formed with a plated layer in an area including an area in contact with the friction material. The method according to claim 6, Wherein the back plate is formed with a plated layer in an area including an area in contact with the connection flange. A plurality of friction materials formed in a columnar shape with a predetermined height; A base plate formed in a plate shape with a predetermined area and shape; and a plurality of joint portions formed in a cylindrical shape having an upper portion and a lower portion protruding from the upper portion of the base plate at a height smaller than the height of the friction material, A connecting flange; A back plate which is formed in a plate shape corresponding to the connection flange and on which the friction material is joined and the connection flange is joined by spot welding; And a dovetail coupled to the bottom surface of the back plate and coupled to the brake system to secure the friction pad. 9. The method of claim 8, Wherein the connection flange is formed with a plated layer in an area including an area in contact with the friction material. 10. The method according to claim 8 or 9, Wherein the connection flange is formed with a plated layer in an area including an area in contact with the back plate. delete A friction material forming process of forming a friction material in a columnar shape of a predetermined height; A connection flange including a base plate formed in a plate shape with a predetermined area and a shape and a plurality of joints protruding from the base plate at a height smaller than the height of the friction material and formed in a cylindrical shape having upper and lower portions opened, A coupling flange and a back plate coupling process for joining the back plate formed by the corresponding plate shape by spot welding; A friction material joining the friction material to the coupling flange and the back plate by the sintering process; And And a back plate joining the back plate and the dovetail by spot welding, and a dovetail joining process. delete 13. The method of claim 12, Wherein a plating layer is formed on an area where the connection flange is in contact with the friction material or the back plate and a plating layer is formed on an area including an area where the back plate is in contact with the coupling flange or the friction material. Gt; delete

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