Spring and rubber mat bonding process for automobile vibration reduction

Abstract

The invention aims at providing the spring and rubber mat bonding process for automobile vibration reduction, and the problem that bonding of a spring and a rubber mat is prone to breakage is solved, the spring and rubber mat bonding process for automobile vibration reduction comprises the steps that S1, the rubber mat is designed according to the shape of the bottom end of the spring, and a spring groove is formed in the rubber mat; s2, an active agent is coated in the spring groove in advance; s3, coating hot vulcanized rubber on the active agent, and abutting the bottom end of the spring against the hot vulcanized rubber; s4, the spring is compressed downwards, so that the bottom end of the spring is bonded with the spring groove; s5, the spring is kept in a compressed state, and the heating temperature is 150-200 DEG C; s6, cooling is conducted; s7, the spring is released, the active agent is coated in the spring groove, that is, the active agent is coated on the rubber mat, and then the active agent is coated with the hot vulcanized rubber, so that the viscidity of the hot vulcanized rubber can be increased, the spring and the rubber mat are tightly bonded together, at the moment, the spring and the rubber mat can bear heavier loads, and the service life of the spring is prolonged. Therefore, the problem that the bonding between the spring and the rubber mat is easy to break is solved.

Description

Technical Field

[0001] The invention relates to the field of automobile vibration reduction, in particular to a spring and rubber pad bonding process for automobile vibration reduction. Background Art

[0002] In the current design of front and rear shock absorbers of automobiles, rubber pads are conventionally used to protect the connection between the spring and the vehicle body. Since the parts are located in the chassis system of the vehicle, during use, sand, gravel, mud, etc. may enter between the spring and the rubber pad, causing mutual friction between the two, damaging the surface coating of the spring, and even severely damaging the rigid substrate of the spring, causing the spring to be corroded at the contact position, and ultimately causing early breakage of the spring. In addition, due to the gap between the two caused by the corresponding substances, abnormal noises often occur during use.

[0003] When the product is under a small load, room temperature polyurethane two-component glue can be used for bonding and meet the requirements. However, when the working load is large, the corresponding bonding strength does not meet the use requirements. In order to further improve the bonding strength of the product, the spring and the rubber pad will not move relative to each other during use, protect the gap at the contact position, and prevent the entry of sand, gravel, mud, etc., ultimately achieving the purpose of extending the spring life and preventing abnormal noise caused by relative friction. Summary of the invention

[0004] The purpose of the invention is to provide a spring and rubber pad bonding process for automobile vibration reduction, which solves the problem that the spring and rubber pad are easily broken during bonding.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a spring and rubber pad bonding process for automobile vibration reduction, comprising: S1. Design the rubber pad according to the shape of the bottom end of the spring, and there is a spring groove on the rubber pad; S2, apply active agent in the spring groove in advance; S3, then apply hot vulcanized rubber on the activator, and place the bottom end of the spring against the hot vulcanized rubber; S4, compress the spring downwards to make the bottom end of the spring bond with the spring groove; S5. Keep the spring in a compressed state and heat it to 150-200°C; S6, cooling down; S7, release spring.

[0006] Optionally, in S3, the ratio of the activator to the hot-vulcanized rubber is greater than or equal to 1 to 3.

[0007] Optionally, in S4, a jig is used to compress the spring, and the spring is kept in a compressed state, and the spring is compressed downward by 3-5%.

[0008] Optionally, in S5, the bottom end of the spring and the rubber pad are heated in a heating furnace, and after the heating temperature reaches 150-200° C., the temperature is kept for 25-35 minutes.

[0009] Optionally, in S5, induction heating is performed using a medium frequency induction heater to keep the bottom end of the spring and the rubber pad in a temperature range of 150-200° C. for 10-20 seconds.

[0010] Optionally, in S7, the fixture is disassembled, the spring is released, and the spring is reset.

[0011] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The invention discloses a spring and rubber pad bonding process for automobile vibration reduction. Since the activator is coated in the spring groove, that is, the activator is coated on the rubber pad, and then the hot vulcanized adhesive is coated on the activator, the adhesiveness of the hot vulcanized adhesive can be increased, so that the spring and the rubber pad are tightly bonded together. At this time, the spring and the rubber pad can withstand a heavier load, thereby solving the problem that the spring and the rubber pad are easily broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings: Figure 1 It is a stereoscopic view of a jig for bonding a spring and a rubber pad for automobile vibration reduction according to a preferred embodiment of the present invention; Figure 2 is an exploded view of the compression assembly and base; Figure 3 This is an exploded view of the rubber pad and base; Figure 4 It is a three-dimensional view of the rubber pad; Figure 5 yes Figure 4 A stereoscopic view from another perspective is shown.

[0013] The reference numerals are described as follows: 1. Rubber pad; 2. Spring groove; 3. Bump; 4. Positioning piece; 5. Sink groove; 6. Base; 7. Rotary groove; 8. Spring; 9. Compression assembly; 10. Positioning area; 21. Outer wall; 22. Inner wall; 23. Bottom wall; 61. Bottom groove; 62. Through hole; 63. Limiting piece; 64. Avoidance area; 65. Sinking platform; 91. Vertical rod; 92. Pressure block; 93. Bottom ring; 94. Inner ring; 95. Limiting rod; 96. Height hole; 97. Compression column; 98. Avoidance hole. DETAILED DESCRIPTION

[0014] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0016] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] like Figure 1 and Figure 2 and Figure 3 As shown, A spring and rubber pad bonding process for automobile vibration reduction, comprising: S1. Design the rubber pad according to the shape of the bottom end of the spring, and there is a spring groove on the rubber pad; S2, apply active agent in the spring groove in advance; S3, then apply hot vulcanized rubber on the activator, and place the bottom end of the spring against the hot vulcanized rubber; S4, compress the spring downwards to make the bottom end of the spring bond with the spring groove; S5. Keep the spring in a compressed state and heat it to 150-200°C; S6, cooling down; S7, release spring.

[0018] In S3, the ratio of the activator to the hot vulcanized rubber is greater than or equal to 1 to 3, and the ratio of the activator to the hot vulcanized rubber is usually 2 to 3.

[0019] In S4, a jig is used to compress the spring. In this example, the jig uses a compression assembly and keeps the spring in a compressed state. The spring is compressed downward by 3-5%.

[0020] In S5, the bottom end of the spring and the rubber pad are heated in a heating furnace so that the activator and the hot vulcanized rubber are heated. After the heating temperature reaches 150-200° C., the temperature is maintained for 25-35 minutes.

[0021] In S5, induction heating can also be performed with a medium frequency induction heater, and the medium frequency induction heater can also be used for induction heating with a high frequency induction heater, so that the bottom end of the spring and the rubber pad are in the temperature range of 150-200°C, that is, the activator and the hot vulcanized rubber are in the temperature range of 150-200°C, and the temperature is kept for 10-20 seconds.

[0022] In S7, disassembling the fixture means disassembling the compression assembly, releasing the spring, and resetting the spring. At this time, the bottom end of the spring is completely bonded to the rubber pad.

[0023] The components in the active agent are calculated by weight percentage as follows: xylene ≤ 60.0%, ethylbenzene ≤ 15.0%, nitrogen-substituted aromatic compounds ≤ 10.0%, zinc compounds ≤ 5.0%, imides ≤ 5.0%, carbon black ≤ 5.0% and toluene ≤ 0.9%, wherein the nitrogen-substituted aromatic compounds include indole, pyrrole, pyridine, quinoline and carbazole, the zinc compounds include zinc oxide, zinc hydroxide, zinc sulfate, zinc chloride and zinc sulfide, the imides include phthalimide, succinimide, N-bromosuccinimide, glutarimide, maleimide, 3,4,9,10-perylenetetracarboxylic acid diimide, 1,8-naphthalene diimide and imide fungicides.

[0024] In the present invention, the nitrogen-substituted aromatic compounds, zinc compounds and imides listed are only examples, and other nitrogen-substituted aromatic compounds, zinc compounds and imides that can enhance the viscosity of hot-vulcanized adhesives should be included in the protection scope of the present invention.

[0025] The components in the hot vulcanized rubber are calculated by weight as follows: ethyl acetate <100%, trichloroisocyanuric acid <5.0%.

[0026] The tooling used in the above process includes a base 6 and a compression assembly 9. A bottom groove 61 is provided on the base 6. The bottom groove 61 is bent and extends to both ends of the base 6. The extension path of the bottom groove 61 is consistent with the extension path of the rubber pad 1. The bottom groove 61 is used to install the rubber pad 1, and the bottom end of the spring 8 is used to stick the rubber pad 1.

[0027] The compression assembly 9 includes a vertical rod 91 and a pressure block 92. The vertical rod 91 is set on the base 6. The vertical rod 91 is used to pass through the center of the spring 8. The vertical rod 91 is sleeved in the spring 8. The pressure block 92 is slidably set on the vertical rod 91. The pressure block 92 is used to squeeze the upper end of the spring 8. The pressure block 91 compresses the spring 8 from top to bottom, and the vertical rod 91 has a guiding effect on the pressure block 91.

[0028] The bottom groove 61 is tilted on the base 6 , and the bottom groove 61 is bent and extended on the base 6 . The two ends of the bottom groove 61 are low and the middle is high, so that the rubber pad 1 is also tilted in the bottom groove 61 , and the rubber pad 1 and the bottom groove 61 are interference fit, and the rubber pad 1 and the bottom groove 61 can also be separated.

[0029] The base 6 is provided with a through hole 62 , which is located inside the extension path of the bottom groove 61 , and the bottom groove 61 is arranged around the through hole 62 .

[0030] A limiting piece 63 is provided on the base 6 , and the limiting piece 63 is located at the end of the bottom groove 61 . When the rubber pad 6 is placed in the bottom groove 62 , the positioning piece 4 abuts against the limiting piece 63 .

[0031] The base 6 is also provided with an escape area 64 , which is located between two ends of the bottom groove 61 . The escape area 64 is used to escape part of the bottom structure of the spring 8 .

[0032] A sinking platform 65 is provided in the through hole 62 , and the sinking platform 65 is located at the lower part of the base 6 . The through hole 62 and the sinking platform 65 are both for conveniently fixing the base 6 .

[0033] A bottom ring 93 is provided at the bottom of the vertical rod 91 . The bottom ring 93 is clamped in the sink 65 . The vertical rod 91 passes through the through hole 62 upward.

[0034] The compression assembly 9 also includes an inner ring 94, which is slidably arranged on the vertical rod 91. The inner ring 94 is arranged at the bottom of the pressure block 92. The inner ring 94 and the pressure block 92 are integrally formed. The outer diameter of the pressure block 92 is larger than the outer diameter of the inner ring 94. The outer diameter of the pressure block 92 is also larger than or equal to the outer diameter of the spring 8, so that the pressure block 92 can completely cover the spring 8. The inner ring 94 moves with the pressure block 92. When the pressure block 92 is pressed on the top of the spring 8, the outer diameter of the inner ring 94 is smaller than the inner diameter of the spring 8, and the inner ring 94 is located in the spring 8. The inner ring 94 has a limiting effect. If the spring 8 is offset, the inner ring 94 can prevent the spring 8 from offsetting.

[0035] The compression assembly 9 also includes a limit rod 95. The vertical rod 91 is provided with a plurality of height holes 96 in the vertical direction. The limit rod 95 is used to be inserted into the height hole 96. The downward compression distance is determined according to the height of the spring 8. A force is applied to the pressure block 92, the spring 8 contracts, and the pressure block 92 and the spring 8 move downward together. After moving downward a set distance, the limit rod 95 is inserted into the height hole 96. The limit rod 95 is also used to press on the top of the pressure block 92. When the limit rod 95 is pressed on the top of the pressure block 92, the pressure block 92 and the spring 8 cannot be reset, so that the pressure block 92 and the spring 8 remain in the compressed state unchanged.

[0036] The compression assembly 9 also includes a compression column 97, which is hollow. The bottom end of the compression column 97 is pressed on the top end of the compression block 92. The compression column 97 cooperates with other devices to press down. An avoidance hole 98 is also provided on the compression column 97. The avoidance hole 98 is used to avoid the limit rod 95 so that the limit rod 95 can easily penetrate into the height hole 96.

[0037] like Figure 4 and Figure 5As shown, the rubber pad 1 in this example adopts an elastic rubber strip, the rubber pad 1 is bent and extended, the rubber pad 1 is a circular ring with an opening, a spring groove 2 is provided on the rubber pad 1, the spring groove 2 extends to both ends of the rubber pad 1, the extension path of the spring groove 2 is consistent with the extension path of the rubber pad 1, the spring groove 2 also has an arc, a plurality of protrusions 3 are provided on the rubber pad 1, and the plurality of protrusions 3 are distributed at intervals in the spring groove 2, the spring groove 2 is used to place the bottom ring of the spring 8, the spring groove 2 matches the bottom end of the spring 8, glue is pre-coated in the spring groove 2, the bottom end of the spring 8 abuts against the plurality of protrusions 3, so that there is a gap between the bottom end of the spring 8 and the wall of the spring groove 2.

[0038] A positioning piece 4 is provided on the rubber pad 1, and the positioning piece 4 is located at the end of the spring slot 2. Only one positioning piece 4 is provided and is only provided at one end of the spring slot 2. The bottom end of the spring 8 abuts against the positioning piece 4, so that when the spring 8 is compressed downward, the positioning piece 4 can prevent the spring 8 from moving.

[0039] A sink groove 5 is also provided at the end of the spring groove 2. The sink groove 5 is located on the inner side of the positioning piece 4. The sink groove 5 is used to collect debris and dust. In addition, when the bottom head of the spring 8 is too large, it can be clamped in the sink groove 5, and the spring 8 body is placed in the spring groove 2.

[0040] A rotary groove 7 is provided at the bottom inner end of the rubber pad 1 for positioning. A positioning area 10 is provided on the bottom groove 61. When the rubber pad 1 is placed into the bottom groove 61, the rotary groove 7 fits into the positioning area 10, and the rotary groove 7 helps fix the rubber pad 1.

[0041] The spring groove 2 has an outer wall 21, an inner wall 22 and a bottom wall 23. The bottom wall 23 is arranged between the outer wall 26 and the inner wall 22. The inner wall 22 bends and extends upward. The inner wall 22 has a curved surface. When the inner wall 22 extends upward, it moves away from the outer wall 21. In this way, the upper opening of the spring groove 2 is larger than the bottom, the inner wall 22 is more easily fitted to the base 6, and the contact area between the inner wall 22 and the base 6 is increased.

[0042] The convex point 3 is hemispherical, and multiple convex points 3 are evenly distributed in the spring groove 2, so that the glue between adjacent convex points 3 can be evenly distributed, the rubber pad 1 is evenly bonded in the spring groove 2, and the convex point 3 is annularly wrapped around the bottom ring of the spring 8.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A spring and rubber pad bonding process for automobile vibration reduction, characterized in that: include: S1. Design the rubber pad according to the shape of the bottom end of the spring, and there is a spring groove on the rubber pad; S2, apply active agent in the spring groove in advance; S3, then apply hot vulcanized rubber on the activator, and place the bottom end of the spring against the hot vulcanized rubber; S4, compress the spring downwards to make the bottom end of the spring bond with the spring groove; S5. Keep the spring in a compressed state and heat it to 150-200°C; S6, cooling down; S7, release spring.

2. The spring and rubber pad bonding process for automobile vibration reduction according to claim 1 is characterized in that: In S3, the ratio of the activator to the hot-vulcanized rubber is greater than or equal to 1 to 3.

3. The spring and rubber pad bonding process for automobile vibration reduction according to claim 1 is characterized in that: In S4, a jig is used to compress the spring and keep the spring compressed, with the spring compressed downward by 3-5%.

4. The spring and rubber pad bonding process for automobile vibration reduction according to claim 1 is characterized in that: In S5, the bottom end of the spring and the rubber pad are heated in a heating furnace. After the heating temperature reaches 150-200° C., the temperature is maintained for 25-35 minutes.

5. The spring and rubber pad bonding process for automobile vibration reduction according to claim 1 is characterized in that: In S5, a medium frequency induction heater is used for induction heating, so that the bottom end of the spring and the rubber pad are in a temperature range of 150-200° C. and kept warm for 10-20 seconds.

6. The spring and rubber pad bonding process for automobile vibration reduction according to claim 1 is characterized in that: In S7, the fixture is disassembled, the spring is released, and the spring is reset.

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