A processing device for rivet connection of shock absorber

Abstract

The present invention provides a processing device for rivet connection of shock absorber. The device includes a fixed supporting base, a mold for receiving riveting action, a first positioning assembly provided at one end of the mold for radial positioning of the mold, and a second positioning assembly provided at the other end of the mold for axial positioning of the mold; one end of the mold is provided with a plurality of radial positioning members, and the other end is provided with an axial positioning groove, and the active end of the first positioning assembly has a plurality of radial positioning corresponding members equal to the number of the radial positioning members; the active end of the second positioning assembly is provided with a top pressure head provided corresponding to the radial positioning groove. Under the pressure of the axial positioning device and the radial positioning device, the present invention will expand radially so as to fit the inner wall of the oil storage cylinder of the shock absorber, thereby realizing the riveting of the curved surface. In addition, the molds used include a variety of models, which can be suitable for the riveting requirements of different components.

Description

Technical Field

[0001] The invention relates to a processing device used for rivet connection of a shock absorber, belonging to the technical field of riveting. Background Art

[0002] Shock absorbers are damping devices that can be used to reduce impacts. They are widely used in the automotive field and are very helpful in improving the smoothness of car driving. With the rapid development of the automobile industry, the automotive parts industry has also grown and developed synchronously. At the same time, the market competition in the shock absorber industry will become more intense, and higher requirements are put forward for shock absorbers, requiring shock absorbers to have higher strength, durability, and sealing. At the same time, shock absorber manufacturing also pays more and more attention to environmental protection and personal safety issues.

[0003] The components of automobile shock absorbers include spring discs, stabilizer bar brackets, U-shaped brackets and positioning brackets, etc. These components need to be fixed to the oil storage cylinder of the shock absorber. The commonly used method at present is welding. After the components and the oil storage cylinder are fitted and positioned, welding rods are used to join the two together at the joint. Although this welding method is fast, it has various disadvantages in terms of safety and quality. On the one hand, the welding process may cause safety accidents such as fire, explosion, scalding and acute poisoning, as well as arc, welding smoke, toxic gases, high-frequency electromagnetic radiation and other harmful factors to the human body, causing environmental pollution and harm to human health; the surface of the parts used in this welding process is generally treated with paint spraying, which makes the parts have defects such as high adhesion requirements, short service life and inconsistent appearance quality.

[0004] Riveting is a method of connecting two or more workpieces together by rivets. The operation process requires the participation of molds and rivets. Usually, the workpiece to be riveted is fixed on the mold, and then the rivet is nailed from the top. After the rivet pierces the workpiece, it deforms and fits with the groove of the mold, thereby achieving the connection and fixation of the workpiece. The riveting method can achieve the connection between the shock absorber components and the oil storage cylinder without welding or spraying, which improves the appearance quality. The entire manufacturing process is harmless to the environment and guarantees the personal safety and health of the operator. However, this method requires the cooperation of the mold. Usually, the riveted object is an easy-to-operate flat component. For components such as automobile shock absorbers that need to be connected on a cylindrical oil storage cylinder, the existing flat mold cannot meet this requirement. Moreover, the number of riveting points of different riveted parts is different. At this time, the conventional method requires frequent replacement of the mold position each time riveting, and the operation process is cumbersome. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a processing device for shock absorber rivet connection. The present invention adopts an expandable mold, cooperates with a radial positioning rod and an axial positioning rod, realizes the mold to fit the cylinder wall, and thus completes the riveting of the curved surface.

[0006] Specifically, the technical solution of the present invention is as follows:

[0007] A riveting device used for automobile shock absorbers, which comprises: a fixed supporting base, a mold for receiving riveting, a first positioning assembly arranged at one end of the mold for radial positioning of the mold, and a second positioning assembly arranged at the other end of the mold for axial positioning of the mold; one end of the mold is provided with a plurality of radial positioning pieces, and the other end is provided with an axial positioning groove, the active end of the first positioning assembly has a plurality of radial positioning corresponding pieces equal to the number of the radial positioning pieces; the active end of the second positioning assembly is provided with a top pressure head arranged corresponding to the axial positioning groove.

[0008] In the above content, the active end refers to the end of the first positioning component and the second positioning component that are in direct contact with the mold in the working state.

[0009] As a preferred embodiment of the above scheme, the mold is a columnar mold formed by combining a plurality of fan-shaped mold pieces; the top pressure head has a male guide bevel, the axial positioning groove has a female guide bevel, and the male guide bevel is matched with the female guide bevel.

[0010] As a preferred embodiment of the above solution, the non-active ends of the first positioning assembly and the second positioning assembly are both provided with positioning grooves for applying pressure by a hydraulic press.

[0011] As a preferred embodiment of the above scheme, each of the fan-shaped mold pieces is provided with the radial positioning piece.

[0012] As a preferred embodiment of the above scheme, the number of the fan-shaped mold pieces is 4, 6 or 8.

[0013] As a preferred embodiment of the above scheme, the second positioning assembly is provided with a columnar guide portion for cooperating with the inner wall of the oil storage cylinder serving as the riveting object.

[0014] As a preferred embodiment of the above scheme, the outer diameter of the mold is smaller than the inner diameter of the oil storage cylinder as the riveting object, so that the plurality of fan-shaped mold pieces can expand radially after being subjected to the axial action of the top pressure head.

[0015] As a preferred embodiment of the above scheme, the second positioning assembly is provided with a columnar guide portion for cooperating with the inner wall of the oil storage cylinder as the riveting object, and the columnar guide portion is larger than the outer diameter of the mold.

[0016] As a preferred embodiment of the above solution, a through hole is axially arranged inside the mold.

[0017] As a preferred embodiment of the above scheme, a vacant area is formed in the middle of the active end of the first positioning component.

[0018] As a preferred embodiment of the above scheme, the shape of the vacant area is cylindrical.

[0019] The following beneficial effects can be obtained by applying the technical solution of the present invention:

[0020] (1) The mold used in the present invention has a radial positioning piece at one end corresponding to the action end of the first positioning component. After the mold and the first positioning component are combined through the radial positioning piece, the mold can be radially fixed so that the component will not rotate radially; the other end of the mold is provided with a female guide bevel corresponding to the male guide bevel of the second positioning component. After the mold and the second positioning component are combined through the male and female guide bevels, the mold can be axially fixed so that the mold will not slide axially. Through the combined use of the two positioning components, the mold can be positioned at the specified riveting point and then enter a fixed state, and no positional displacement will occur during the riveting process.

[0021] (2) The mold used in the present invention is composed of a plurality of fan-shaped mold pieces, each of which is provided with a radial positioning assembly. After the female guide bevel of the mold is axially squeezed by the male guide bevel, the mold pieces are subjected to radial forces, thereby expanding and spreading in the radial direction and fitting with the inner wall of the oil storage cylinder, thereby realizing the positioning of the mold and the riveting point and achieving the riveting of the curved surface.

[0022] (3) The present invention provides three types of molds including 4, 6 and 8 mold pieces. Since different riveted elements require different numbers of riveted sites, the use of corresponding molds can avoid operations such as mold replacement and repositioning during the riveting process, greatly shortening the riveting time, while reducing the error caused by repositioning the mold and improving the riveting quality.

[0023] (4) The non-working ends of the first positioning assembly and the second positioning assembly of the present invention are provided with two positioning grooves. When the hydraulic press applies pressure to the positioning assembly, the force direction can be stabilized according to the positioning grooves to avoid damage to the tooling during the pressure application process caused by force offset. In addition, the rod body of the second positioning assembly is provided with a columnar guide portion that fits with the inner wall of the oil storage cylinder, so that the second positioning assembly can be fixed in the radial direction to avoid radial shaking when subjected to force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of the present invention;

[0025] Figure 2 is a schematic structural diagram of a second positioning assembly of the present invention;

[0026] Figure 3 is a top view of the mold of the present invention;

[0027] Figure 4 is an end view of the mold of the present invention;

[0028] Figure 5 is a cross-sectional view of a mold of the present invention;

[0029] Figure 6 is a schematic diagram of a first positioning assembly of the present invention;

[0030] Figure 7 is an end view of a first positioning assembly of the present invention;

[0031] In the figure, 1-fixed supporting base, 2-mold, 3-first positioning assembly, 4-second positioning assembly, 5-positioning groove; 21-radial positioning member, 22-axial positioning groove, 23-through hole; 31-radial positioning corresponding member, 32-vacant area; 41-top pressure head, 42-columnar guide part. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with embodiments.

[0033] As described in the background art, the existing welding process for automobile shock absorber components has various defects, and the traditional riveting technology is often limited by the mold and can only rivet flat components, but cannot process curved surfaces such as the oil storage cylinder of the shock absorber.

[0034] In order to solve this problem, the present invention provides a processing device for connecting rivets of a shock absorber, such as Figure 1-7As shown, it includes a fixed support base 1, a mold 2 for receiving the riveting action, a first positioning assembly 3 provided at one end of the mold for radial positioning of the mold, and a second positioning assembly 4 provided at the other end of the mold for axial positioning of the mold; one end of the mold 2 is provided with four radial positioning members 21, and the other end is provided with an axial positioning groove 22, and the active end of the first positioning assembly 3 has a radial positioning corresponding member 31 equal to the number of the radial positioning members 21; the active end of the second positioning assembly 4 is provided with a top pressure head 41 corresponding to the radial positioning groove 22. The mold 2 is a columnar mold formed by combining four fan-shaped mold pieces; the top pressure head 41 has a male guide bevel, and the axial positioning groove 22 has a female guide bevel, and the male guide bevel is matched with the female guide bevel. The non-active ends of the first positioning assembly 3 and the second positioning assembly 4 are both provided with a positioning groove 5. Each fan-shaped mold piece is provided with the radial positioning member 21. The second positioning assembly 4 is provided with a columnar guide portion 42 for matching with the inner wall of the oil storage cylinder as the riveting object. The outer diameter of the mold 2 is smaller than the inner diameter of the oil storage cylinder as the riveting object, so that the four fan-shaped mold pieces can expand radially after being axially acted upon by the top pressure head 41. The second positioning component 4 is provided with a columnar guide portion 42 for matching with the inner wall of the oil storage cylinder as the riveting object, and the columnar guide portion 42 is larger than the outer diameter of the mold 2. A through hole 23 is axially provided inside the mold 2. A vacant area 32 is formed in the middle of the action end of the first positioning component 3.

[0035] In addition, the present invention also provides a specific operation method of a processing device for connecting rivets of a shock absorber, which specifically comprises the following steps:

[0036] (1) Positioning of components and dies: After placing the oil storage cylinder on a fixed support base, position the components to be riveted, dies, blank holders and riveting machine punches to the riveted parts.

[0037] (2) Fixing and expanding the mold: Use a hydraulic press to apply pressure to the non-acting ends of the first positioning assembly and the second positioning assembly to expand the fan-mounted mold piece of the mold radially and fit tightly against the inner wall of the oil storage cylinder.

[0038] (3) Implementation of the riveting process: Place the rivet into the blank holder and use a punch to complete the riveting.

[0039] (4) Withdrawal of the die: After riveting is completed, retract the punch, remove the blank holder, remove the pressure of the hydraulic press, and withdraw the second clamping device and the first clamping device from the oil storage cylinder pipeline in turn.

[0040] The specific use method of the present invention is further described below by way of examples:

[0041] Example 1

[0042] Riveting of hose bracket:

[0043] (1) Place two supporting bases, with one base placed directly below the punch of the riveting machine and the other base 200 mm apart from it, and fix the two bases mechanically; place the oil storage cylinder flat on the supporting base, adjust the axial position, and place the part to be riveted directly below the punch of the riveting machine; place the mold containing 4 fan-shaped mold pieces into the pipeline of the oil storage cylinder, use the first positioning component to axially position it to the part to be riveted, and rotate the mold group through the first positioning component so that the mold groove is aligned with the part to be riveted; position the hose bracket and the pressure ring for placing rivets to the part to be riveted, and align the punch of the riveting machine with the pressure ring for positioning.

[0044] (2) Insert the second positioning assembly from the other side of the oil storage barrel pipeline. When the female guide bevel of the mold and the male guide bevel of the second positioning assembly are engaged, use a hydraulic device to apply pressure inward through the positioning grooves of the non-active ends of the first positioning assembly and the second positioning assembly, so that the fan-shaped mold pieces of the mold expand and move radially, and finally fit tightly against the inner wall of the oil storage barrel.

[0045] (3) Place a rivet into the blank holder and use a punch to apply pressure to the rivet so that the rivet pierces the component to be riveted and the oil storage cylinder and deforms to achieve the connection function. After completion, retract the punch of the riveting machine, remove the blank holder, turn off the hydraulic device, and withdraw the second positioning assembly from the pipeline axially to shrink the mold radially. Then withdraw the mold and the first positioning assembly from the pipeline together to complete the riveting operation.

[0046] Example 2

[0047] Riveting of spring disc:

[0048] (1) Place three supporting bases, place the oil storage cylinder flat on the bases, adjust the positions of the bases so that one of the bases is in the center of the cylinder and the other two are 30 mm away from both ends of the cylinder, and fix the bases mechanically; put a spring disk on the oil storage cylinder, adjust the position of the spring disk so that the part to be riveted of the spring disk is aligned with the punch; put the mold containing 8 mold pieces into the oil storage cylinder tube, use the first positioning assembly to axially position it to the part to be riveted, and rotate the mold so that the mold groove is aligned with the part to be riveted; position the spring disk and the pressure ring for placing rivets to the part to be riveted, and align the punch of the riveting machine with the pressure ring for positioning.

[0049] (2) Insert the second positioning device from the other side of the oil storage barrel pipeline. When the female guide bevel of the mold and the male guide bevel of the second positioning component are engaged, use a hydraulic device to apply pressure inward through the positioning grooves at the non-active ends of the first positioning component and the second positioning component, so that the fan-shaped mold pieces of the mold expand and move radially, and finally fit tightly against the inner wall of the oil storage barrel.

[0050] (3) Place a rivet into the blank holder and use a punch to apply pressure to the rivet so that the rivet pierces the part to be riveted and the oil storage cylinder and deforms to achieve connection. After completion, retract the punch of the riveting machine, remove the blank holder, and complete the riveting at one of the locations.

[0051] (4) Reduce the pressure of the hydraulic device, rotate the oil storage cylinder and the positioning device to align the punch with the second riveting position of the spring disk, then increase the pressure of the hydraulic press, completely fix the device, position the blank holder, adjust the punch to align with the blank holder, insert the rivet, and perform the same operation as in step (3) to perform riveting.

[0052] (5) Repeat the operation in step (4) multiple times until all the parts to be riveted are riveted, then turn off the hydraulic device, withdraw the second positioning assembly axially from the pipe, cause the mold to shrink radially, and then withdraw the mold and the first positioning device together from the pipe to complete the riveting operation.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A processing device for rivet connection of a shock absorber, characterized in that: The invention comprises a fixed support base (1), a mold (2) for receiving a riveting action, a first positioning assembly (3) provided at one end of the mold for radially positioning the mold, and a second positioning assembly (4) provided at the other end of the mold for axially positioning the mold; one end of the mold (2) is provided with a plurality of radial positioning members (21), and the other end is provided with an axial positioning groove (22); the active end of the first positioning assembly (3) has a plurality of radial positioning corresponding members (31) equal in number to the radial positioning members (21); the second positioning assembly ( 4) is provided with a top pressing head (41) corresponding to the axial positioning groove (22) at the active end; the mold (2) is a columnar mold formed by combining a plurality of fan-shaped mold pieces; the top pressing head (41) has a male guiding bevel, the axial positioning groove (22) has a female guiding bevel, and the male guiding bevel and the female guiding bevel are arranged in coordination; each of the fan-shaped mold pieces is provided with the radial positioning piece (21); the non-active ends of the first positioning component (3) and the second positioning component (4) are both provided with positioning grooves (5).

2. A processing device for rivet connection of shock absorber according to claim 1, characterized in that: The number of the fan-shaped mold pieces is 4, 6 or 8.

3. The processing device for rivet connection of shock absorber according to claim 1, characterized in that: The second positioning assembly (4) is provided with a columnar guide portion (42) for cooperating with the inner wall of the oil storage cylinder serving as a riveting object.

4. The processing device for rivet connection of shock absorber according to claim 1, characterized in that: The outer diameter of the mold (2) is smaller than the inner diameter of the oil storage cylinder as the riveting object, so that the plurality of fan-shaped mold pieces can expand radially after being subjected to the axial action of the ram (41).

5. A processing device for rivet connection of shock absorber according to claim 4, characterized in that: The second positioning assembly (4) is provided with a columnar guide portion (42) for cooperating with the inner wall of the oil storage cylinder as the riveting object, and the columnar guide portion (42) is larger than the outer diameter of the mold (2).

6. The processing device for rivet connection of shock absorber according to claim 1, characterized in that: A through hole (23) is axially arranged inside the mold (2).

7. The processing device for rivet connection of shock absorber according to claim 1, characterized in that: A vacant area (32) is formed in the middle of the active end of the first positioning component (3).

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