Motor vehicle brake disc, press-riveting apparatus and method

Abstract

The application relates to the technical field of braking equipment, in particular to a motor vehicle brake disc, a press-fitting and riveting device and a method, the motor vehicle brake disc press-fitting and riveting device comprising an upper die, a lower die, a press-fitting assembly and a riveting assembly; the press-fitting assembly comprises a lower stripper plate, a friction ring, a brake disc hub, an upper die spring, an upper press core and a lower top component; through a riveting process, one side protrusion limiting forces the brake disc hub outer tooth small diameter material to flow and accumulate, one side limiting is completed, and the other side material is deformed; through side punching, the friction ring is used as a concave die, the brake disc hub and the friction ring are riveted together, meanwhile, due to the fact that the riveting buckle is formed without needing to punch a strip hole in advance, the press-fitting and riveting is completed in one step, the punch is prevented from being damaged due to excessive stress, and meanwhile, the mold cost and the production cost are greatly saved.

Description

Technical Field

[0001] This invention relates to the field of braking equipment technology, specifically to a motor vehicle brake disc, press-fitting and riveting equipment and method. Background Technology

[0002] With the continuous development of the domestic automobile industry, the market requirements for brake discs are also getting higher and higher. The process of pressing friction rings and brake discs made of different materials together to form composite brake discs is widely used.

[0003] In Chinese patent document CN102341612A, a method is disclosed for pressing a friction ring and a brake disc hub together using a pierced convex shape on one side and a flange on the other side; or in another Chinese patent document CN103890436B, a method is disclosed for pressing a friction ring and a brake disc hub together using a brake disc hub side punched convex shape on one side and a skirt side pushed out on the other side.

[0004] The side punching process mold requires the use of a double-acting wedge mechanism, which has a complex mold structure, high mold processing cost, and the punch is subjected to great force during operation, making it very easy to be damaged. In addition, the original process requires side punching strip holes on the disc hub before riveting, and then side punching the strip hole position after riveting, which increases the product cost and process difficulty. Summary of the Invention

[0005] The purpose of this invention is to provide a motor vehicle brake disc, press-fitting and riveting equipment and method, aiming to solve the technical problems in the prior art where the side punching convex bulge process mold requires the use of a double-acting wedge mechanism, the mold structure is complex, the mold processing cost is high, and the punch is subjected to large forces during operation, making the punch very easy to be damaged. At the same time, the original process requires side punching strip holes on the disc hub before riveting, and then side punching the strip hole position to the side punch groove after riveting, which increases the product cost and process difficulty.

[0006] To achieve the above objectives, the present invention provides a method for press-fitting and riveting a motor vehicle brake disc, characterized by comprising the following steps:

[0007] Excess material on the minor diameter of the outer teeth of the brake disc hub is scraped off from top to bottom using a stamping die, forming a material accumulation.

[0008] The brake disc hub is placed in the friction ring, and the brake disc hub is pressed into the friction ring using a press-fit riveting device;

[0009] After being pressed in, the material at the large diameter of the outer teeth of the brake disc hub is punched and deformed by the press-fitting and riveting equipment to form a protruding buckle on the brake disc hub for fixation.

[0010] In this process, excess material on the minor diameter of the outer teeth of the brake disc hub is scraped off from top to bottom using a stamping die, forming a material accumulation, including:

[0011] Material accumulation results in the brake disc hub surface protrusions A, which are evenly distributed in the circumferential position at the minor diameter of the outer teeth of the brake disc hub, with a number of teeth ranging from 1 / 4 to 1 times the number of teeth.

[0012] The material accumulation results in the brake disc hub surface protrusions A, with 1 / 4 to 1 times the number of teeth, being evenly distributed circumferentially at the minor diameter of the outer teeth. These protrusions include:

[0013] Place the brake disc hub onto the lower punch in the stamping die;

[0014] After placement is completed, the upper template is moved from top to bottom, causing the punch to move and interfere with the brake disc hub;

[0015] As the punch continues to move downward until it reaches the closed position, a small protrusion with a certain plane is formed on the outside of the brake disc hub.

[0016] A motor vehicle brake disc press-fitting and riveting device includes an upper die and a lower die, wherein the upper die is disposed above the lower die.

[0017] It also includes press-fit components and riveting components;

[0018] The press-fit assembly includes a lower ejector plate, a friction ring, a brake disc hub, an upper mold spring, an upper pressure core, and a lower pusher component. The lower ejector plate is fixedly connected to the lower mold and is located on the side of the lower mold closer to the upper mold. The friction ring is mounted on the lower ejector plate. The brake disc hub is detachably connected to the friction ring and is located inside the friction ring. The upper mold spring is fixedly connected to the upper mold and is located inside the upper mold. The upper pressure core is located below the upper mold spring. The lower pusher component is located on the lower mold.

[0019] The lower support component includes a brake disc hub stripping spring and a slider mechanism spring. The brake disc hub stripping spring is installed at the bottom of the lower die. The slider mechanism spring is fixedly connected to the lower die and is located on the side of the lower die away from the brake disc hub stripping spring.

[0020] The riveting assembly includes a snap-fit ​​forming punch and a moving component. The snap-fit ​​forming punch is used to cooperate with the moving component to punch a groove in the brake disc hub.

[0021] The movable component includes a main slider mechanism and a slider mechanism. The main slider mechanism is fixedly connected to the lower die and is located on the side of the lower die near the lower ejector plate. The slider mechanism is fixedly connected to the snap-fit ​​forming punch and movably connected to the lower die, and is located on the side of the lower die near the main slider mechanism.

[0022] During the punching process, the buckle forming punch drives the inner teeth of the brake disc hub to deform, forming a protruding buckle on the brake disc hub.

[0023] A motor vehicle brake disc is produced by the aforementioned motor vehicle brake disc press-fitting and riveting method.

[0024] This invention discloses a motor vehicle brake disc, press-fitting and riveting equipment and method. Through the riveting process, a protrusion on one side limits the flow of small-diameter material from the outer teeth of the brake disc hub, thus completing the limit on one side and deforming the material on the other side. By using a side punch, the friction ring is used as a die, allowing the brake disc hub and the friction ring to be riveted together. At the same time, since the forming of the riveting buckle does not require pre-cutting of strip holes, the press-fitting and riveting can be completed in one step, preventing damage to the punch due to excessive force. This also greatly saves on mold costs and production costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a flowchart illustrating the steps of the motor vehicle brake disc press-fitting and riveting method provided by the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the motor vehicle brake disc press-fitting and riveting equipment provided by the present invention.

[0028] Figure 3 This is a schematic diagram of the assembly and placement position of the brake disc hub and friction ring before press-fitting and riveting, provided by the present invention.

[0029] Figure 4 This is a schematic diagram showing the assembly and riveting of the brake disc hub and friction ring provided by the present invention.

[0030] Figure 5 This is the invention Figure 4 A magnified view of point A.

[0031] Figure 6 This is a schematic diagram of the brake disc of the present invention.

[0032] Figure 7 This is the invention Figure 6 Enlarged view of point B.

[0033] Figure 8 This is a schematic diagram of the brake disc of the present invention from another direction.

[0034] Figure 9 This is the invention Figure 8 Enlarged view of point C.

[0035] Figure 10 This is a schematic diagram of the stamping die of the present invention.

[0036] In the diagram: 1-Upper die, 2-Lower die, 3-Lower stripper plate, 4-Friction ring, 5-Brake disc hub, 6-Upper die spring, 7-Upper pressure core, 8-Brake disc hub stripper spring, 9-Slider mechanism spring, 10-Snap-fit ​​forming punch, 11-Slider mechanism, 12-Main slider mechanism, 13-Brake disc hub protruding snap, 14-Brake disc hub surface protrusion A, 15-Brake disc hub mating surface B, 16-Brake disc hub mating surface C, 17-Upper template, 18-Punch, 19-Pressure core, 20-Lower forming punch, 21-Lower punch, 22-Lower template, 23-Pressure core spring. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] Please see Figures 1 to 10 This invention provides a method for press-fitting and riveting a motor vehicle brake disc, comprising the following steps:

[0040] S100. Excess material on the minor diameter of the outer teeth of the brake disc hub 5 is scraped off from top to bottom using a stamping die to form a material accumulation.

[0041] Specifically, the material accumulation causes the brake disc hub 5 to have 1 / 4 to 1 times the number of teeth evenly distributed on the circumferential position of the minor diameter of the outer teeth. The brake disc hub 5 is then placed on the lower punch 21 in the stamping die. After placement, the upper template 17 is moved from top to bottom, causing the punch 18 to move and interfere with the brake disc hub 5. When the punch 18 continues to move downward until it reaches the closed position, a small protrusion with a certain plane is formed on the outside of the brake disc hub 5.

[0042] The stamping die scrapes off excess material from the minor diameter of the outer teeth of the brake disc hub 5 from top to bottom, forming a material accumulation. This results in the brake disc hub surface protrusions A14, with 1 / 4 to 1 times the number of teeth, being evenly distributed circumferentially at the minor diameter of the outer teeth. By designing the brake disc hub 5 into a flared shape (the diameter of the brake disc hub 5 within 2-5 mm from the skirt edge is smaller than the meshing diameter, facilitating its placement within the friction ring 4), the toothed meshing disc hub and the friction ring 4 are fitted with an interference fit.

[0043] The forming process of the brake disc hub surface protrusion A14:

[0044] The punch 18 and the pressure core 19 are mounted on the upper template 17, wherein the pressure core 19 can move relative to the upper template 17 via the pressure core spring 23, and the lower punch 21 and the lower forming punch 20 are mounted on the lower template 22, which are stationary relative to the ground.

[0045] The brake disc hub 5 is placed on the lower punch 21 and inside the lower forming punch 20. The pressure core spring 23 above the pressure core 19 is in the released state, causing the pressure core 19 to press the brake disc hub 5 and move the upper template 17 downward. The punch 18 moves downward with the upper template 17. Because the inner tooth diameter of the punch 18 is smaller than the outer tooth minor diameter of the brake disc hub 5, the punch 18 interferes with the brake disc hub 5, thereby moving the material of the brake disc hub 5 that is interfering downward. The positions of the brake disc hub 5 and the lower forming punch 20 remain unchanged. The punch 18 continues to move downward until the punch 18 reaches the closed position. The flowing material finally accumulates on the upper surface of the brake disc hub 5 and forms a small protrusion on a certain plane, thereby completing the forming of the protrusion A14 on the brake disc hub surface.

[0046] S101. Place the brake disc hub 5 in the friction ring 4, and press the brake disc hub 5 into the friction ring 4 using a press-fitting and riveting device.

[0047] Specifically, because the lower diameter of the brake disc hub 5 is smaller than the meshing diameter, a portion of the toothed area of ​​the brake disc hub 5 enters the friction ring 4 under manual pressure.

[0048] S102. After pressing in, the material at the large diameter of the outer teeth of the brake disc hub 5 is punched and deformed by the press-fitting and riveting equipment to form the brake disc hub protrusion buckle 13 for fixing.

[0049] The brake disc hub 5 is first pressed into the friction ring 4 using a press-fitting and riveting device, so that the brake disc hub protrusion A14 and the friction ring 4 contact the brake disc hub mating surface B15, thereby achieving fixation in one direction; then, the material at the large diameter of the outer teeth of the brake disc hub 5 is deformed by the press-fitting and riveting device to form the brake disc hub protrusion buckle 13, and the brake disc hub protrusion buckle 13 and the friction ring 4 contact the brake disc hub mating surface C16, thereby achieving fixation in the other direction.

[0050] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 A motor vehicle brake disc press-fitting and riveting device includes an upper mold 1 and a lower mold 2, wherein the upper mold 1 is disposed above the lower mold 2.

[0051] It also includes press-fit components and riveting components;

[0052] The press-fit assembly includes a lower ejector plate 3, a friction ring 4, a brake disc hub 5, an upper mold spring 6, an upper pressure core 7, and a lower pusher component. The lower ejector plate 3 is fixedly connected to the lower mold 2 and is located on the side of the lower mold 2 close to the upper mold 1. The friction ring 4 is mounted on the lower ejector plate 3. The brake disc hub 5 is detachably connected to the friction ring 4 and is located inside the friction ring 4. The upper mold spring 6 is fixedly connected to the upper mold 1 and is located inside the upper mold 1. The upper pressure core 7 is located below the upper mold spring 6. The lower pusher component is located on the lower mold 2.

[0053] For further details, please refer to Figure 2 The lower support component includes a brake disc hub stripping spring 8 and a slider mechanism spring 9. The brake disc hub stripping spring 8 is installed at the bottom of the lower mold 2. The slider mechanism spring 9 is fixedly connected to the lower mold 2 and is located on the side of the lower mold 2 away from the brake disc hub stripping spring 8.

[0054] For further details, please refer to Figure 2 The riveting assembly includes a snap-fit ​​forming punch 10 and a moving component. The snap-fit ​​forming punch 10 is used to cooperate with the moving component to punch a groove in the brake disc hub 5.

[0055] For further details, please refer to Figure 2 The moving component includes a main slider mechanism 12 and a slider mechanism 11. The main slider mechanism 12 is fixedly connected to the lower mold 2 and is located on the side of the lower mold 2 near the lower ejector plate 3. The slider mechanism 11 is fixedly connected to the snap-fit ​​forming punch 10 and is movably connected to the lower mold 2, and is located on the side of the lower mold 2 near the main slider mechanism 12.

[0056] For further details, please refer to Figure 4 , Figure 5 and Figure 9 During the punching process, the buckle forming punch 10 drives the internal teeth of the brake disc hub 5 to deform, forming a brake disc hub protruding buckle 13.

[0057] In this embodiment, the pressing process is as follows:

[0058] The friction ring 4 is placed on the lower ejector plate 3, and then the brake disc hub 5 is placed in the friction ring 4. Because the lower diameter of the brake disc hub 5 is smaller than the meshing diameter, a portion of the toothed area of ​​the brake disc hub 5 enters the friction ring 4 under manual pressure. The upper mold spring 6 is in the released state, and the brake disc hub 5 is lifted by the brake disc hub ejector spring 8. The upper mold 1 is moved from top to bottom, and the upper pressure core 7 moves with the upper mold 1. The brake disc hub ejector spring 8 is located below the brake disc hub 5, and the slider mechanism spring 9 is located below the friction ring 4. In the initial process, the upper pressure core 7 presses down on the brake disc hub 5. Because the pressure of the upper mold spring 6 is greater than the pressure required for the brake disc hub ejector spring 8 to press, the upper pressure core 7 and the brake disc hub ejector spring 8 cooperate until the protrusion A14 on the brake disc hub surface and the friction ring 4 contact the brake disc hub mating surface B15, thus completing the pressing process of the brake disc hub 5.

[0059] Riveting process:

[0060] After the pressing is completed, the upper pressing core 7 continues to move downward with the upper mold 1. At this time, the spring of the upper pressing core 7 is compressed to the maximum stroke and no longer compressed. The upper pressing core 7 presses the friction ring 4, and the friction ring 4 presses the slider mechanism 11 to move along the inclined plane of the main slider mechanism 11. During the movement, the slider mechanism 11 moves the snap-fit ​​forming punch 10, so that the snap-fit ​​forming punch 10 interferes with the internal teeth of the brake disc hub 5, and extrudes and deforms the teeth of the brake disc hub. At this time, the friction ring 4 and the brake disc hub mating surface C16 have the function of punching die. During the punching process of the snap-fit ​​forming punch 10, the internal teeth of the brake disc hub 5 are deformed to form the brake disc hub protruding snap 13. The brake disc hub protruding snap 13 fits with the friction ring 4 and the brake disc hub mating surface C16, thereby completing the riveting process of the brake disc hub 5 and the friction ring 4.

[0061] A motor vehicle brake disc is produced by the press-fitting and riveting method and equipment for motor vehicle brake discs.

[0062] The present invention discloses a motor vehicle brake disc, a press-fitting and riveting device and method. Through the riveting process, a protrusion on one side limits the flow of small-diameter material on the outer tooth of the brake disc hub 5, thereby completing the limit on one side and deforming the material on the other side. By using a side punch, the friction ring 4 is used as a die, so that the brake disc hub 5 and the friction ring 4 are riveted together. At the same time, since the forming of the riveting buckle does not require pre-cutting of strip holes, the press-fitting and riveting is completed in one step, preventing damage to the punch due to excessive force, and greatly saving mold costs and production costs.

[0063] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A method of press-riveting a brake disc for a motor vehicle, characterized in that, Includes the following steps: Excess material on the minor diameter of the outer teeth of the brake disc hub is scraped off from top to bottom using a stamping die, forming a material accumulation. The brake disc hub is placed in the friction ring, and the brake disc hub is pressed into the friction ring using a press-fit riveting device; After pressing, the material at the large diameter of the outer teeth of the brake disc hub is punched and deformed by the press-fitting and riveting equipment to form a protruding buckle on the brake disc hub for fixing. The motor vehicle brake disc press-fitting and riveting equipment applied to the aforementioned motor vehicle brake disc press-fitting and riveting method includes an upper die and a lower die, wherein the upper die is disposed above the lower die, and further includes a press-fitting assembly and a riveting assembly; The press-fit assembly includes a lower ejector plate, a friction ring, a brake disc hub, an upper mold spring, an upper pressure core, and a lower pusher component. The lower ejector plate is fixedly connected to the lower mold and is located on the side of the lower mold closer to the upper mold. The friction ring is mounted on the lower ejector plate. The brake disc hub is detachably connected to the friction ring and is located inside the friction ring. The upper mold spring is fixedly connected to the upper mold and is located inside the upper mold. The upper pressure core is located below the upper mold spring. The lower pusher component is located on the lower mold. The lower support component includes a brake disc hub stripping spring and a slider mechanism spring. The brake disc hub stripping spring is installed at the bottom of the lower die. The slider mechanism spring is fixedly connected to the lower die and is located on the side of the lower die away from the brake disc hub stripping spring. The riveting assembly includes a snap-fit ​​forming punch and a moving component. The snap-fit ​​forming punch is used to cooperate with the moving component to punch a groove in the brake disc hub. The moving component includes a main slider mechanism and a slider mechanism. The main slider mechanism is fixedly connected to the lower die and is located on the side of the lower die near the lower ejector plate. The slider mechanism is fixedly connected to the snap-fit ​​forming punch and movably connected to the lower die, and is located on the side of the lower die near the main slider mechanism. During the punching process, the snap-fit ​​forming punch drives the internal teeth of the brake disc hub to deform, forming a protruding snap-fit ​​on the brake disc hub.

2. The method for press-fitting and riveting a motor vehicle brake disc as described in claim 1, characterized in that, Excess material on the minor diameter of the outer teeth of the brake disc hub is scraped off from top to bottom using a stamping die, forming a material accumulation, including: Material accumulation results in the brake disc hub surface protrusions A, which are evenly distributed in the circumferential position at the minor diameter of the outer teeth of the brake disc hub, with a number of teeth ranging from 1 / 4 to 1 times the number of teeth.

3. The method for press-fitting and riveting a motor vehicle brake disc as described in claim 2, characterized in that, Material accumulation results in the brake disc hub surface protrusions A, with 1 / 4 to 1 times the number of teeth, being evenly distributed circumferentially at the minor diameter of the outer teeth, including: Place the brake disc hub onto the lower punch in the stamping die; After placement is completed, the upper template is moved from top to bottom, causing the punch to move and interfere with the brake disc hub; As the punch continues to move downward until it reaches the closed position, a small protrusion with a certain plane is formed on the outside of the brake disc hub.

4. A motor vehicle brake disc, characterized in that, It is produced by the motor vehicle brake disc press-fitting and riveting method as described in any one of claims 1 to 3.

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