Fastening bolt assembly and machining process thereof

Abstract

The invention relates to the technical field of bolts, and discloses a fastening bolt assembly and a machining process thereof.The fastening bolt assembly comprises a screw, one end of the screw is provided with a lock washer, the lock washer is arranged between the screw and a connected piece, the other end of the screw is provided with a nut, and the tail end of the screw is provided with a locking ring; the locking ring is arranged at the bottom end of the nut, a fastening hole is formed in the locking ring, an isolation ring is fixedly connected to the interior of the locking ring, the isolation ring is fixedly connected to the interior of the fastening hole, and a fastening assembly is arranged in the locking ring. The locking ring is automatically locked after the bolt body is tightened through the elastic buckle structure, the bolt can be prevented from loosening due to vibration or external force in the using process, and therefore the long-term fastening stability of the bolt is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of bolts, and specifically to a fastening bolt assembly and its processing technology. Background Art

[0002] Currently, common fastening bolt assemblies on the market mainly include traditional bolts, self-locking nuts, and nut-bolt combinations, etc. These traditional fastening bolt assemblies have proven to have a certain degree of stability and reliability in daily use, especially in ordinary environments. However, in high-vibration, high-temperature, corrosive environments, or long-term load-bearing conditions, there are still some non-negligible deficiencies in traditional fastening bolt assemblies.

[0003] Although traditional bolts and self-locking nuts can provide a certain fastening effect, in high-vibration or high-load environments, bolts often become loose due to external forces such as vibration and impact. Especially for mechanical equipment with high-frequency vibration, the combination of ordinary bolts and self-locking nuts is difficult to maintain long-term stability. Even when using high-strength bolts or anti-loosening designs, the small displacements caused by vibration still cannot be effectively eliminated, resulting in loosening phenomena occurring from time to time. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a fastening bolt assembly and its processing technology, which solves the problem that traditional bolts and self-locking nuts often become loose due to external forces such as vibration and impact.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A fastening bolt assembly includes a screw rod. One end of the screw rod is provided with a lock washer, and the lock washer is arranged between the screw rod and the connected part. The other end of the screw rod is provided with a nut, and the tail end of the screw rod is provided with a locking ring. The locking ring is arranged at the bottom end of the nut. A fastening hole is opened inside the locking ring. A fastening hole is opened inside the locking ring. An isolation ring is fixedly connected inside the locking ring, and the isolation ring is fixedly connected inside the fastening hole. A fastening component is arranged inside the locking ring.

[0006] Preferably, the fastening component includes a spring. Both ends of the spring are fixedly connected inside the locking ring. A sliding shaft is slidably connected inside the locking ring. One end of the sliding shaft is fixedly connected with a retaining ring, and the outer wall of the retaining ring is arranged on the outer wall of the isolation ring. The other end of the sliding shaft is rotatably connected with a handle, and the outer wall of the handle is rotatably connected to the outer wall of the locking ring.

[0007] Preferably, the sliding shaft is slidably connected inside the locking ring through the fastening hole, and the inner wall of the spring is slidably connected to the outer wall of the sliding shaft.

[0008] Preferably, the diameter of the screw ranges from M10 to M20, and the length ranges from 50 mm to 200 mm.

[0009] Preferably, the thickness of the lock washer is 1 mm - 2 mm, and the inner diameter of the lock washer matches the outer diameter of the screw.

[0010] Preferably, a processing technology for a fastening bolt assembly includes the following steps: S1. Forge the screw. Use high-strength alloy steel material and forge the material into a preliminary shape through hot forging or cold forging process. S2. Turn the forged screw. Use a lathe to precisely machine the outer diameter of the bolt. S3. Roll the thread part of the screw. Use a thread rolling machine to process the thread. S4. Heat-treat the screw, including quenching and tempering processes. S5. Galvanize or phosphatize the surface of the screw. S6. Stamping-form the lock washer. Use a stamping machine to process the shape of the lock washer. S7. Heat-treat the lock washer, carry out tempering treatment. S8. Finish the surface of the lock washer, remove burrs and ensure the surface is smooth. S9. Laser-cut the locking ring into a shape that meets the design requirements. S10. Bend the locking ring to adjust the angle and elasticity of the fastening component part. S11. Polish and deburr the surface of the locking ring. S12. Surface-treat the locking ring, and carry out treatment by spraying, electroplating or coating process. S13. Assemble the lock washer, screw and locking ring in sequence.

[0011] Preferably, the forging temperature of the screw is controlled between 900°C and 1200°C, the outer diameter precision after turning is ±0.05 mm, the thread rolling precision is 6H, the heat treatment temperature of the screw is 950°C - 1000°C, and the tempering temperature is 500°C - 550°C.

[0012] Preferably, during the stamping-forming process of the lock washer, a precision die is used to make the inner diameter of the lock washer match the outer diameter of the screw, and the tempering treatment temperature is 350°C - 450°C.

[0013] Preferably, the laser cutting precision of the locking ring is ±0.05 mm, the bending angle precision is ±1°, the surface roughness after polishing does not exceed Ra0.4 μm, and the surface treatment adopts galvanizing process with a coating thickness of 10 μm - 20 μm.

[0014] Preferably, a method for using a fastening bolt assembly comprises the following steps: S1. Prepare the necessary tools, including wrenches and screwdrivers; S2. Place the anti-loosening washer on the connected part; S3, passing the screw through the hole on the connected part; S4. Screw on the nut until it is tightened; S5. Put the locking ring on the end of the screw rod, and then turn the handle. When the handle rotates on the outer wall of the locking ring, the sliding shaft is driven to slide. The sliding of the sliding shaft compresses the spring. At the same time, the isolation ring is used to block the retaining ring to prevent the sliding shaft from sliding out of the locking ring. When the handle drives the sliding shaft to slide, the locking ring is tightened to make it clamp the screw rod; S6. When disassembling, push the handle in the opposite direction to release the lock; S7, rotate the nut in reverse direction to remove the screw; S8. Remove the anti-loosening washer to complete the entire disassembly process.

[0015] The present invention provides a fastening bolt assembly and a processing technology thereof, which has the following beneficial effects: 1. The locking ring of the present invention automatically locks after the bolt body is tightened through an elastic buckle structure, which can prevent the bolt from loosening due to vibration or external force during use, thereby ensuring the long-term stability of the bolt tightening.

[0016] 2. The locking ring design of the present invention allows unlocking by manually turning the handle, which simplifies the disassembly process, does not require additional tools, facilitates quick disassembly and reassembly, and improves maintenance efficiency.

[0017] 3. The present invention ensures the high quality and high reliability of the fastening bolt assembly through multiple high-precision processing techniques (such as turning, rolling, heat treatment, etc.), especially having obvious effects in high temperature resistance, high load and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front perspective view of a fastening bolt assembly of the present invention; Figure 2 A side perspective view of a fastening bolt assembly of the present invention; Figure 3 It is a schematic diagram of the exploded structure of a fastening bolt assembly of the present invention; Figure 4 It is a schematic diagram of the partial structure of a locking ring of a fastening bolt assembly of the present invention; Figure 5 It is a schematic diagram of the structure of a fastening assembly of a fastening bolt assembly of the present invention; Figure 6Schematic diagram of the partial structure of the isolation ring of a fastening bolt assembly according to the present invention; Figure 7 Flow chart of a processing technology of a fastening bolt assembly according to the present invention; Figure 8 Flow chart of a usage method of a fastening bolt assembly according to the present invention.

[0019] Wherein, 1, screw rod; 2, lock washer; 3, nut; 4, locking ring; 5, fastening hole; 6, isolation ring; 7, fastening assembly; 71, spring; 72, sliding shaft; 73, retaining ring; 74, handle. Specific embodiments

[0020] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to the attached Figure 1 - attached Figure 6 , an embodiment of the present invention provides a fastening bolt assembly, including a screw rod 1, a lock washer 2 is arranged at one end of the screw rod 1, the lock washer 2 is arranged between the screw rod 1 and the connected part, a nut 3 is arranged at the other end of the screw rod 1, a locking ring 4 is arranged at the tail end of the screw rod 1, the locking ring 4 is arranged at the bottom end of the nut 3, a fastening hole 5 is opened inside the locking ring 4, a fastening hole 5 is opened inside the locking ring 4, an isolation ring 6 is fixedly connected inside the locking ring 4, the isolation ring 6 is fixedly connected inside the fastening hole 5, and a fastening assembly 7 is arranged inside the locking ring 4. The fastening assembly 7 includes a spring 71, both ends of the spring 71 are fixedly connected inside the locking ring 4, a sliding shaft 72 is slidably connected inside the locking ring 4, a retaining ring 73 is fixedly connected to one end of the sliding shaft 72, the outer wall of the retaining ring 73 is arranged on the outer wall of the isolation ring 6, a handle 74 is rotatably connected to the other end of the sliding shaft 72, and the outer wall of the handle 74 is rotatably connected to the outer wall of the locking ring 4. The sliding shaft 72 is slidably connected inside the locking ring 4 through the fastening hole 5, and the inner wall of the spring 71 is slidably connected to the outer wall of the sliding shaft 72.

[0022] Specifically, place the anti-loosening washer 2 on the connected part, then pass the screw 1 through the hole in the connected part, and then screw the nut 3 onto the screw 1 until it is tightened. Then, put the locking ring 4 on the end of the screw 1, and then turn the handle 74. When the outer wall of the handle 74 rotates on the outer wall of the locking ring 4, it will drive the sliding shaft 72 to slide. When the sliding shaft 72 slides, the spring 71 will be compressed. At the same time, the isolation ring 6 plays a limiting role to prevent the retaining ring 73 from sliding out of the inside of the locking ring 4. When the handle 74 drives the sliding shaft 72 to slide, the locking ring 4 will be tightened to clamp the screw 1. When disassembly is required, reverse the handle 74 by hand to release the locking state of the locking ring 4 on the screw 1, then reverse-rotate the nut 3 and remove the screw 1 and the anti-loosening washer 2 to complete the entire disassembly process; The locking ring 4 is automatically locked by the elastic snap structure of the fastening component 7 after the screw 1 is tightened, preventing the bolt from loosening due to vibration or external force during use, thus ensuring the long-term stability of the bolt fastening. And the design of the locking ring 4 allows for manual unlocking, simplifying the disassembly process without the need for additional tools, facilitating quick disassembly and reinstallation, and improving the maintenance efficiency.

[0023] The diameter range of the screw 1 is M10 - M20, and the length range is 50mm - 200mm.

[0024] Specifically, it ensures that the screw 1 can be applicable to fastening applications of different specifications and sizes. By adjusting the size of the screw 1, a suitable screw 1 can be selected according to different engineering requirements to adapt to different loads and working conditions.

[0025] According to the actual usage requirements, screws 1 of different diameters and lengths can be selected. The screw 1 with a larger diameter has stronger load-bearing capacity and tensile strength and is suitable for heavy-load applications; while the screw 1 with a smaller diameter is suitable for precision fastening and provides higher installation flexibility.

[0026] The thickness of the anti-loosening washer 2 is 1mm - 2mm, and the inner diameter of the anti-loosening washer 2 matches the outer diameter of the screw 1.

[0027] Specifically, the thickness range of the anti-loosening washer 2 is 1mm - 2mm, and the inner diameter matches the outer diameter of the screw 1, ensuring close contact between the anti-loosening washer 2 and the bolt body, and being able to provide appropriate pre-tightening force during the tightening process of the nut 3, thus effectively preventing the nut 3 from loosening. The reasonable thickness can ensure that the washer has sufficient elasticity to form a stable anti-loosening mechanism in an environment with high vibration or temperature changes.

[0028] The precise fit of the anti-loosening washer 2 and the screw 1 (matching of inner diameter and outer diameter) can prevent the anti-loosening washer 2 from sliding or shifting, ensuring the stability of the entire fastening system. This fit can also effectively avoid wear and damage caused by mismatch between the bolt body and the anti-loosening washer 2.

[0029] Please refer to the attached Figure 7 , a processing technology for a fastening bolt assembly, comprising the following steps: S1. Forge the screw 1, using high-strength alloy steel material, and forge the material into a preliminary shape through hot forging or cold forging process; S2. Turn the forged screw 1, and use a lathe to precisely machine the outer diameter of the bolt; S3. Roll the thread part of the screw 1, and use a thread rolling machine to process the thread; S4. Heat-treat the screw 1, including quenching and tempering processes; S5. Galvanize or phosphatize the surface of the screw 1; S6. Stamping and forming the lock washer 2, and use a stamping machine to process the shape of the lock washer 2; S7. Heat-treat the lock washer 2, and carry out tempering treatment; S8. Finish the surface of the lock washer 2, remove burrs and ensure the surface is smooth; S9. Laser cut the locking ring 4 into a shape that meets the design requirements; S10. Bend the locking ring 4 to adjust the angle and elasticity of the fastening assembly 7 part; S11. Polish and deburr the surface of the locking ring 4; S12. Surface-treat the locking ring 4, and carry out treatment by spraying, electroplating or coating process; S13. Assemble the lock washer 2, the screw 1 and the locking ring 4 in sequence.

[0030] Specifically, through precise turning, rolling and heat-treatment processes, it is possible to ensure that the outer diameter, thread accuracy and strength of the bolt body meet high requirements, and it is applicable to high-load and high-precision application scenarios.

[0031] The multi-step processes such as forging, turning and heat-treatment enhance the strength, hardness and toughness of the bolt, ensuring that it is not easily deformed or fatigued during long-term operation.

[0032] Through galvanizing or phosphatizing treatment, the corrosion resistance of the bolt is improved, especially suitable for use under harsh environmental conditions, and the service life is extended.

[0033] Through precise stamping and laser cutting technologies, the accuracy of the lock washer and the locking ring is ensured, the fit of the fastener is optimized, and the anti-loosening and anti-corrosion effects are improved.

[0034] The forging temperature of the screw 1 is controlled between 900°C - 1200°C. The outer diameter precision after turning is ±0.05mm, the thread rolling precision is 6H. The heat treatment temperature of the screw 1 is 950°C - 1000°C, and the tempering temperature is 500°C - 550°C.

[0035] Specifically, controlling the forging temperature between 900°C - 1200°C helps to improve the metal structure of the bolt body, making it stronger. And the outer diameter precision and thread precision are controlled through precision turning and rolling processes.

[0036] The heat treatment process (quenching and tempering) can significantly increase the hardness and strength of the bolt, enhancing the durability of the bolt, especially its performance under high load and high temperature conditions.

[0037] The precise thread rolling process ensures that the threads of the bolt meet the standards, reducing the loosening problems caused by unqualified threads and improving the reliability of the overall fastening.

[0038] During the stamping process of the lock washer 2, a precision die is used to match the inner diameter of the lock washer 2 with the outer diameter of the screw 1. The tempering treatment temperature is 350°C - 450°C.

[0039] Specifically, using a precision die during the stamping process can ensure the fitting precision between the lock washer and the bolt body, improving the stability of the bolt assembly. The precise inner diameter fit reduces failures caused by fitting looseness or deviation.

[0040] The tempering treatment enhances the elasticity of the lock washer, enabling it to better adapt to deformation under high temperature and high load environments, forming a more effective pre-tightening force, thus increasing the functionality of the lock washer.

[0041] The long-term elastic retention and high temperature resistance of the lock washer reduce the maintenance requirements caused by loosening and extend the service life of the equipment.

[0042] The laser cutting precision of the locking ring 4 is ±0.05mm, the bending angle precision is ±1°, the surface roughness after polishing does not exceed Ra0.4μm, and the surface treatment uses a galvanizing process with a coating thickness of 10μm - 20μm.

[0043] Specifically, the laser cutting and bending processing technologies can ensure that the buckle part of the locking ring has high precision, enabling it to precisely fit the bolt body and effectively lock to prevent loosening.

[0044] The bending processing and surface polishing processes ensure the stability and durability of the buckle structure, avoiding damage caused by friction and operation.

[0045] The surface galvanizing process improves the corrosion resistance of the locking ring, making it particularly suitable for use in humid or highly corrosive environments, and increasing the durability and rust prevention performance of the locking ring.

[0046] Please refer to the attached Figure 8 , a method for using a fastening bolt assembly, comprising the following steps: S1. Prepare the required tools, including a wrench and a screwdriver; S2. Place the lock washer 2 on the connected part; S3. Pass the screw rod 1 through the hole in the connected part; S4. Screw on the nut 3 until it is tightened; S5. Slip the locking ring 4 onto the end of the screw rod 1, and then turn the handle 74. When the handle 74 rotates on the outer wall of the locking ring 4, it drives the sliding shaft 72 to slide. The sliding of the sliding shaft 72 compresses the spring 71. At the same time, the spacer 6 is used to block the retaining ring 73 to prevent the sliding shaft 72 from sliding out of the inside of the locking ring 4. When the handle 74 drives the sliding shaft 72 to slide, it will tighten the locking ring 4 so that it catches the screw rod 1; S6. During disassembly, reverse the handle 74 by hand to release the locked state; S7. Reverse-rotate the nut 3 and remove the screw rod 1; S8. Remove the lock washer 2 to complete the entire disassembly process.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fastening bolt assembly, comprising a screw rod (1), characterized in that, One end of the screw (1) is provided with a lock washer (2), the lock washer (2) is arranged between the screw (1) and the connected part, the other end of the screw (1) is provided with a nut (3), the tail end of the screw (1) is provided with a locking ring (4), the locking ring (4) is arranged at the bottom end of the nut (3), a fastening hole (5) is opened inside the locking ring (4), a fastening hole (5) is opened inside the locking ring (4), an isolation ring (6) is fixedly connected inside the locking ring (4), the isolation ring (6) is fixedly connected inside the fastening hole (5), and a fastening assembly (7) is arranged inside the locking ring (4).

2. The fastening bolt assembly according to claim 1, wherein, The fastening assembly (7) includes a spring (71), both ends of the spring (71) are fixedly connected inside the locking ring (4), a sliding shaft (72) is slidably connected inside the locking ring (4), one end of the sliding shaft (72) is fixedly connected with a retaining ring (73), the outer wall of the retaining ring (73) is arranged on the outer wall of the isolation ring (6), the other end of the sliding shaft (72) is rotatably connected with a handle (74), and the outer wall of the handle (74) is rotatably connected to the outer wall of the locking ring (4).

3. The fastening bolt assembly according to claim 2, wherein, The sliding shaft (72) is slidably connected inside the locking ring (4) through the fastening hole (5), and the inner wall of the spring (71) is slidably connected to the outer wall of the sliding shaft (72).

4. The fastening bolt assembly according to claim 1, wherein, The diameter range of the screw (1) is M10 - M20, and the length range is 50mm - 200mm.

5. The fastening bolt assembly according to claim 1, characterized in that, The thickness of the lock washer (2) is 1mm - 2mm, and the inner diameter of the lock washer (2) matches the outer diameter of the screw (1).

6. A processing technology for a fastening bolt assembly, characterized in that For the fastening bolt assembly according to any one of claims 1 - 5, the following steps are included: S1. Forge the screw (1), using high-strength alloy steel material, and forge the material into a preliminary shape through hot forging or cold forging process; S2. Machine the forged screw (1), and use a lathe to precisely machine the outer diameter of the bolt; S3. Perform rolling treatment on the threaded part of the screw (1), and use a thread rolling machine for thread processing; S4. Heat-treat the screw (1), including quenching and tempering processes; S5. Perform galvanizing or phosphating treatment on the surface of the screw (1); S6. Stamping-form the lock washer (2), and use a stamping machine to process the shape of the lock washer (2); S7. Heat-treat the lock washer (2) and perform tempering treatment; S8. Finish the surface of the lock washer (2) to remove burrs and ensure a smooth surface; S9. Laser-cut the locking ring (4) into a shape that meets the design requirements; S10. Bend-process the locking ring (4) to adjust the angle and elasticity of the fastening assembly (7) part; S11. Polish and deburr the surface of the locking ring (4); S12. Perform surface treatment on the locking ring (4), and use spraying, electroplating or coating process for treatment; S13. Assemble the lock washer (2), the screw (1) and the locking ring (4) in sequence.

7. The processing technology of the fastening bolt assembly according to claim 6, characterized in that, The forging temperature of the screw (1) is controlled between 900°C and 1200°C, the outer diameter accuracy after turning is ±0.05mm, the thread rolling accuracy is 6H, the heat treatment temperature of the screw (1) is 950°C-1000°C, and the tempering temperature is 500°C-550°C.

8. The processing technology of the fastening bolt assembly according to claim 6, characterized in that, During the stamping process of the anti-loosening washer (2), a precision mold is used to match the inner diameter of the anti-loosening washer (2) with the outer diameter of the screw (1), and the tempering temperature is 350°C-450°C.

9. The processing technology of the fastening bolt assembly according to claim 6, characterized in that, The locking ring (4) has a laser cutting accuracy of ±0.05 mm, a bending angle accuracy of ±1°, a surface roughness after polishing of no more than Ra0.4 μm, and a surface treatment using a galvanizing process with a coating thickness of 10 μm-20 μm.

10. A method for using a fastening bolt assembly, characterized in that, The fastening bolt assembly according to any one of claims 1 to 5 comprises the following steps: S1. Prepare the necessary tools, including wrenches and screwdrivers; S2. Place the anti-loosening washer (2) on the connected part; S3, passing the screw (1) through the hole on the connected part; S4. Screw on the nut (3) until it is tightened; S5. The locking ring (4) is sleeved on the end of the screw (1), and the handle (74) is turned. When the handle (74) rotates on the outer wall of the locking ring (4), the sliding shaft (72) is driven to slide. The sliding of the sliding shaft (72) compresses the spring (71). At the same time, the isolation ring (6) is used to block the retaining ring (73) to prevent the sliding shaft (72) from sliding out of the locking ring (4). When the handle (74) drives the sliding shaft (72) to slide, the locking ring (4) is tightened to make it clamp the screw (1). S6. When disassembling, manually push the handle (74) in the opposite direction to release the locked state; S7, rotate the nut (3) in reverse to remove the screw (1); S8. Remove the anti-loosening washer (2) to complete the disassembly process.

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