Manufacturing method, using method and application system of lock bolt

Abstract

According to the manufacturing method, the using method and the application system of the lock bolt, ingredients of alloy components in a preset proportion are smelted, and an alloy ingot is obtained; the alloy ingot is subjected to homogenizing annealing and rolled into a first alloy bar; the first alloy bar is subjected to tensile deformation, so that the first alloy bar is transformed from austenite to martensite, and a second alloy bar is obtained; processing the second alloy bar into a bolt, combining the bolt with a nut to form a thread pair, mounting the manufactured thread pair on preset use equipment, and performing ultrasonic impact on the bolt in the thread pair, so that the bolt reverses from martensite to austenite and generates recovery stress to be self-locked with the nut. The shape memory effect of the bolt can be achieved without a heating process in the use process, and the use reliability of the bolt in the service process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fasteners for power equipment, and particularly to a manufacturing method, a using method and an application system of a self-locking bolt. Background Art

[0002] Power fasteners are widely used in power systems and are components for connecting, fixing and supporting power equipment, wires and cables, as well as various components and parts in power systems. Their manufacturing materials and processes are key factors affecting their working performance.

[0003] Currently, in the manufacturing process of the prior art, it is necessary to heat the bolt to a certain temperature and keep it warm during use to achieve the shape memory effect. However, usually, after the bolt is installed on the equipment, it is very difficult to heat it separately, resulting in poor reliability of the bolt during service. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a manufacturing method, a using method and an application system of a self-locking bolt, which can achieve the shape memory effect of the bolt without heating during use, and improve the reliability of the bolt during service.

[0005] To achieve the above object, an embodiment of the present invention provides a manufacturing method of a self-locking bolt, including: melting a mixture of alloy components in a preset ratio to obtain an alloy ingot; performing homogenization annealing on the alloy ingot and rolling it into a first alloy bar; performing tensile deformation on the first alloy bar to cause the first alloy bar to transform from austenite to martensite, obtaining a second alloy bar; processing the second alloy bar into a bolt and combining it with a nut to form a thread pair.

[0006] An embodiment of the present invention provides a manufacturing method of a self-locking bolt. By melting an alloy, performing homogenization annealing and tensile deformation on the alloy, the internal structure of the alloy transforms from austenite to martensite. At this time, when processed into a bolt, its internal characteristics will be retained. Then, when combined with a nut to form a thread pair, during use, only ultrasonic impact on the bolt is required to cause the unstable martensite structure inside the bolt to transform into a stable austenite structure, shrink along the axial direction of the bolt, and thus generate a recovery stress in the bolt without a heating step, increasing the self-locking friction force between the bolt and the nut, achieving the purpose of anti-vibration and self-locking, and improving the reliability of the bolt during service.

[0007] Further, the batching for smelting alloy components in a preset ratio to obtain an alloy ingot includes: the preset ratio is in mass percentage; the alloy components include Mn, Si, Cr, Ni, Gd, and Y; the mass percentage of Mn is 15% - 25%; the mass percentage of Si is 3% - 6%; the mass percentage of Cr is 2% - 10%; the mass percentage of Ni is 1% - 10%; the mass percentage of Gd is 1% - 5%; the mass percentage of Y is 1% - 3%.

[0008] Through the above solution, adding rare earth metal elements Gd and Y to the alloy components can enhance the shape memory effect of the alloy, improve the shape recovery ability and stability of the alloy, and thus improve the service reliability of the bolt during service.

[0009] Further, homogenization annealing is performed on the alloy ingot and rolled into a first alloy bar, including: performing homogenization annealing on the alloy ingot at a temperature of 1100°C - 1200°C for a time of 10h - 30h and rolling it into a first alloy bar. Tensile deformation is performed on the first alloy bar to cause the first alloy bar to transform from austenite to martensite to obtain a second alloy bar, including: performing tensile deformation with a deformation amount of 3% - 10% on the first alloy bar to cause the first alloy bar to transform from austenite to martensite to obtain a second alloy bar.

[0010] Through the above solution, homogenization annealing and tensile deformation are performed on the alloy, enabling the alloy to transform from austenite to martensite internally and better adapt to stress and deformation during the martensitic phase transformation, which can improve the strength, hardness, and toughness of the alloy, and thus improve the service reliability of the bolt during service.

[0011] The embodiment of the present invention also provides a method for using a self-locking bolt, including: installing the manufactured thread pair on a preset use device, and performing ultrasonic impact on the bolt in the thread pair to cause the bolt to reversely transform from martensite to austenite and generate recovery stress to lock with the nut.

[0012] The embodiment of the present invention proposes a method for using a self-locking bolt. The manufactured thread pair is installed on a preset use device. At this time, the thread pair is in a martensite state. Through ultrasonic impact, the unstable martensite structure inside the bolt is reversely transformed into a stable austenite structure, increasing the self-locking friction force. This process can achieve the purpose of anti-vibration and self-locking without a heating step, improving the service reliability of the bolt during service.

[0013] Further, install the manufactured screw pair onto a preset usage device, and perform ultrasonic impact on the bolt in the screw pair to cause the reverse transformation of the bolt from martensite to austenite and generate residual stress and self-locking with the nut, including: installing the manufactured screw pair onto the preset usage device based on a preset position and a preset direction, and screwing the nut tightly onto the bolt; performing ultrasonic impact on the bolt in the screw pair through an ultrasonic generator based on a preset impact angle and a preset impact time to cause the reverse transformation of the bolt from martensite to austenite and generate residual stress and self-locking with the nut. A usage method of a locking-preventing bolt provided by an embodiment of the present invention further includes: the power range of the ultrasonic impact is 1 kW to 10 kW. A usage method of a locking-preventing bolt provided by an embodiment of the present invention further includes: the impact time of the ultrasonic impact is 2 s to 10 s.

[0014] Through the above solution, performing ultrasonic impact on the bolt of the screw pair installed on the preset usage device only requires setting the impact angle and the impact time, and then it is convenient to perform ultrasonic impact on the bolt in the screw pair through the ultrasonic generator. During this process, no heating is required, which can well solve the problem that the use reliability of the bolt during service is poor due to the limitation of the heating operation when the screw pair is installed on the preset usage device in the prior art. This solution can quickly cause the reverse transformation of the bolt from martensite to austenite and generate residual stress and self-locking with the nut only by performing point-to-point ultrasonic impact on the bolt, thereby improving the use reliability of the bolt during service.

[0015] An embodiment of the present invention further provides an application system of a locking-preventing bolt, including: a manufacturing module and a usage module; the manufacturing module is used for melting a mixture of preset proportion alloy components to obtain an alloy ingot; performing homogenization annealing on the alloy ingot and rolling it into a first alloy bar; performing tensile deformation on the first alloy bar to cause the first alloy bar to transform from austenite to martensite to obtain a second alloy bar; processing the second alloy bar into a bolt and combining it with a nut to form a screw pair; the usage module is used for installing the screw pair manufactured by the manufacturing module onto the preset usage device, and performing ultrasonic impact on the bolt in the screw pair to cause the reverse transformation of the bolt from martensite to austenite and generate residual stress and self-locking with the nut.

[0016] An application system of a lock - preventing bolt is proposed in an embodiment of the present invention. An alloy is obtained through melting by a manufacturing module, and the alloy is subjected to homogenization annealing and tensile deformation, so that the internal structure of the alloy transforms from austenite to martensite. At this time, when processed into a bolt, its internal characteristics will be retained. Then, it is combined with a nut to form a thread pair. Subsequently, during the use process by a use module, only ultrasonic impact on the bolt is required, which can make the unstable martensite structure inside the bolt transform into a stable austenite structure, shrink along the axial direction of the bolt, and then generate a restoring stress in the bolt without a heating process, increasing the self - locking frictional force between the bolt and the nut, achieving the purpose of anti - vibration and lock - prevention, and improving the reliability of the bolt during service.

[0017] Further, the use module is used to install the thread pair manufactured by the manufacturing module onto a preset use device, perform ultrasonic impact on the bolt in the thread pair, so that the bolt undergoes reverse transformation from martensite to austenite and generates a restoring stress to self - lock with the nut. It includes: a thread - pair installation unit and an ultrasonic impact unit; the thread - pair installation unit is used to install the manufactured thread pair onto the device based on a preset position and a preset direction and tighten the nut on the bolt; the ultrasonic impact unit is used to perform ultrasonic impact on the bolt in the thread pair based on a preset impact angle and a preset second time through an ultrasonic generator, so that the bolt undergoes reverse transformation from martensite to austenite and generates a restoring stress to self - lock with the nut. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the step - by - step process of a manufacturing method of a lock - preventing bolt provided by an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the pre - tightening force decay curve under lateral vibration load of a manufacturing method of a lock - preventing bolt provided by an embodiment of the present invention Figure 1 ;

[0020] Figure 3 It is a schematic diagram of the pre - tightening force decay curve under lateral vibration load of a manufacturing method of a lock - preventing bolt provided by an embodiment of the present invention Figure 2 ;

[0021] Figure 4 It is a schematic diagram of the pre - tightening force decay curve under lateral vibration load of a manufacturing method of a lock - preventing bolt provided by an embodiment of the present invention Figure 3 ;

[0022] Figure 5 It is a schematic diagram of the pre - tightening force decay curve under lateral vibration load of a manufacturing method of a lock - preventing bolt provided by an embodiment of the present invention Figure 4 ;

[0023] Figure 6Schematic diagram of the preload decay curve under lateral vibration load for a manufacturing method of a lock - preventing bolt provided by an embodiment of the present invention Figure 5 ;

[0024] Figure 7 Schematic diagram of the preload decay curve under lateral vibration load for a manufacturing method of a lock - preventing bolt provided by an embodiment of the present invention Figure 6 ;

[0025] Figure 8 Schematic diagram of the module structure of an application system for manufacturing a lock - preventing bolt provided by an embodiment of the present invention. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0027] Refer to Figure 1 , Figure 1 which is a schematic diagram of the step flow of a manufacturing method of a lock - preventing bolt provided by an embodiment of the present invention. As Figure 1 shown, an embodiment of the present invention proposes a manufacturing method of a lock - preventing bolt, including steps 101 to 104, and the specific steps are as follows:

[0028] Step 101, melting the ingredients of a preset proportion of alloy components to obtain an alloy ingot;

[0029] In order to improve the shape memory effect of the alloy, an embodiment of the present invention proposes to add rare - earth metal elements Gd and Y to the existing conventional alloy components. Both Gd and Y have good shape memory effects, thereby improving the shape recovery ability of the alloy and the stability of the alloy, and further improving the service reliability of the bolt during service. As an example of this embodiment, the preset proportion is in mass percentage; the alloy components include: Mn, Si, Cr, Ni, Gd, and Y; the mass percentage of Mn is 15% - 25%; the mass percentage of Si is 3% - 6%; the mass percentage of Cr is 2% - 10%; the mass percentage of Ni is 1% - 10%; the mass percentage of Gd is 1% - 5%; the mass percentage of Y is 1% - 3%. A specific implementable manner is to design the alloy components according to performance requirements for batching, and use a vacuum induction electric furnace for melting. The alloy component range is in mass percentage: Mn: 15% - 25%, Si: 3% - 6%, Cr: 2% - 10%, Ni: 1% - 10%, Gd: 1% - 5%, Y: 1% - 3%, and the rest is Fe.

[0030] Step 102: Perform homogenization annealing on the alloy ingot and roll it into a first alloy bar.

[0031] The homogenization annealing process can improve the internal microstructure of the alloy, eliminate or reduce the inhomogeneity of each component in the alloy. By improving the plasticity and toughness of the alloy, it facilitates the subsequent transformation from austenite to martensite inside the alloy. As an example of this embodiment, perform homogenization annealing on the alloy ingot at a temperature of 1100°C to 1200°C for a time of 10h to 30h, and roll it into a first alloy bar. A specific implementable way is to heat the alloy ingot to the predetermined homogenization annealing temperature, hold it at this predetermined homogenization annealing temperature for a period of time, then cool the alloy ingot, and then roll it through a rolling mill to obtain an alloy bar that meets the corresponding requirements.

[0032] Step 103: Perform tensile deformation on the first alloy bar to cause the first alloy bar to transform from austenite to martensite, obtaining a second alloy bar.

[0033] Induce the transformation from austenite to martensite inside the alloy through tensile deformation. Under the action of tensile stress, dislocations and twins in austenite will rearrange and move, resulting in changes in the lattice structure, and finally forming martensite. Through tensile deformation, the alloy can better adapt to stress and deformation during the martensite phase transformation, which can improve the strength, hardness, and toughness of the alloy, and further improve the service reliability of the bolt during service. As an example of this embodiment, perform tensile deformation with a deformation amount of 3% to 10% on the first alloy bar to cause the first alloy bar to transform from austenite to martensite, obtaining a second alloy bar. A specific implementable way is to perform deformation stretching on the first alloy bar at room temperature, stretch 3% to 10% to cause the first alloy bar to transform from austenite to martensite, obtaining a second alloy bar.

[0034] Step 104: Process the second alloy bar into a bolt and combine it with a nut to form a thread pair.

[0035] As an example of this embodiment, according to the preset specifications and preset length requirements of the bolt, use cutting equipment (such as a sawing machine and a cutting machine, etc.) to cut the alloy bar into blanks of appropriate length, perform turning on the blanks to form the head, rod, and thread parts of the bolt, use thread processing equipment (such as a thread lathe and a thread milling machine, etc.) to perform thread processing on the bolt rod to obtain a bolt, and combine the bolt with a nut and a washer to form a thread pair.

[0036] An embodiment of the present invention also provides a method for using a lock - preventing bolt. Install the thread pair manufactured in steps 101 to 104 onto a preset usage device, and perform ultrasonic impact on the bolt in the thread pair, so that the bolt undergoes a reverse transformation from martensite to austenite and generates a recovery stress to lock with the nut.

[0037] Perform ultrasonic impact on the bolt of the thread pair installed on the preset usage device. Only by setting the impact angle and impact time, it is convenient to perform ultrasonic impact on the bolt in the thread pair through an ultrasonic generator. There is no need for a heating step in this process, which can well solve the problem in the prior art that due to the limitations of the heating operation when the thread pair is installed on the preset usage device, the reliability of the bolt during service is poor. In this solution, only by performing point - to - point ultrasonic impact on the bolt, the bolt can quickly undergo a reverse transformation from martensite to austenite and generate a recovery stress to lock with the nut, improving the reliability of the bolt during service. As an example of this embodiment, based on the preset position and preset direction, install the manufactured thread pair onto the preset usage device, and tighten the nut on the bolt; based on the preset impact angle and preset impact time, perform ultrasonic impact on the bolt in the thread pair through an ultrasonic generator, so that the bolt undergoes a reverse transformation from martensite to austenite and generates a recovery stress to lock with the nut. Among them, the power range of the ultrasonic impact is 1kW - 10kW. The impact time of the ultrasonic impact is 2s - 10s. A specific implementable way is to install the thread pair on the preset usage device and perform point - to - point ultrasonic impact on the bolt through an ultrasonic generator such as an ultrasonic vibration rod.

[0038] Embodiment 1

[0039] An embodiment of the present invention provides a manufacturing method of a lock - preventing bolt, which specifically includes:

[0040] S1, Use metals Fe, Mn, Si, Cr, Ni, Gd, and Y with industrial - grade purity to configure an alloy with the composition of Fe 64 Mn 15 Si 4 Cr 10 Ni 3 Gd 2 Y 2 alloy, with the subscript being the mass percentage, and melt it into an alloy ingot using a vacuum induction electric furnace;

[0041] S2, Place the alloy ingot in an annealing furnace, heat it to 1100 °C, hold it for 30h for high - temperature diffusion annealing, and roll it into a rod with a diameter of 6mm (equivalent to the first alloy rod);

[0042] S3, Stretch the 6mm rod by 3% along the axial direction to obtain the second alloy rod;

[0043] S4. Process the stretched second alloy rod into bolts, and combine the bolts with nuts and washers to form a thread pair.

[0044] S5. Install the manufactured thread pair onto a preset usage device, and perform ultrasonic impact on the bolts in the thread pair. The ultrasonic impact power is 1 kW, and the ultrasonic impact duration is 10 s.

[0045] Example 2

[0046] An embodiment of the present invention provides a manufacturing method of a lock - resistant bolt, which specifically includes:

[0047] S1. Use metals Fe, Mn, Si, Cr, Ni, Gd, and Y with industrial - grade purity to configure an alloy with the composition of Fe 61 Mn 17 Si 3 Cr 5 Ni 10 Gd 1 Y 3 alloy, with the subscript being the mass percentage, and melt it into an alloy ingot using a vacuum induction furnace.

[0048] S2. Place the alloy ingot in an annealing furnace, heat it to 1150 °C, hold it for 20 h for high - temperature diffusion annealing, and roll it into a rod with a diameter of 8 mm (equivalent to the first alloy rod).

[0049] S3. Stretch the 8 - mm rod by 4% along the axial direction to obtain the second alloy rod.

[0050] S4. Process the stretched second alloy rod into bolts, and combine the bolts with nuts and washers to form a thread pair.

[0051] S5. Install the manufactured thread pair onto a preset usage device, and perform ultrasonic impact on the bolts in the thread pair. The ultrasonic impact power is 3 kW, and the ultrasonic impact duration is 6 s.

[0052] Example 3

[0053] An embodiment of the present invention provides a manufacturing method of a lock - resistant bolt, which specifically includes:

[0054] S1. Use metals Fe, Mn, Si, Cr, Ni, Gd, and Y with industrial - grade purity to configure an alloy with the composition of Fe 53 Mn 25 Si 3 Cr 6 Ni 7 Gd 5 Y 1 alloy, with the subscript being the mass percentage, and melt it into an alloy ingot using a vacuum induction furnace.

[0055] S2, Place the alloy ingot in an annealing furnace and heat it to 1200 °C. Hold for 10 h for high-temperature diffusion annealing, and then roll it into a rod with a diameter of 10 mm (equivalent to the first alloy rod);

[0056] S3, Stretch the 10-mm rod by 5% along the axis direction to obtain the second alloy rod;

[0057] S4, Process the stretched second alloy rod into a bolt, and combine the bolt with nuts and washers to form a threaded pair;

[0058] S5, Install the manufactured threaded pair onto a preset usage device, and perform ultrasonic impact on the bolt in the threaded pair. The ultrasonic impact power is 5 kW, and the ultrasonic impact duration is 8 s.

[0059] Example 4

[0060] An embodiment of the present invention provides a manufacturing method of a lock-resistant bolt, which specifically includes:

[0061] S1, Use metals Fe, Mn, Si, Cr, Ni, Gd, and Y with industrial-grade purity to configure an alloy with the composition of Fe 59 Mn 20 Si 5 Cr 8 Ni 4 Gd 3 Y 1 The subscript is the mass percentage, and melt it into an alloy ingot using a vacuum induction electric furnace;

[0062] S2, Place the alloy ingot in an annealing furnace and heat it to 1180 °C. Hold for 15 h for high-temperature diffusion annealing, and then roll it into a rod with a diameter of 15 mm (equivalent to the first alloy rod);

[0063] S3, Stretch the 15-mm rod by 7% along the axis direction to obtain the second alloy rod;

[0064] S4, Process the stretched second alloy rod into a bolt, and combine the bolt with nuts and washers to form a threaded pair;

[0065] S5, Install the manufactured threaded pair onto a preset usage device, and perform ultrasonic impact on the bolt in the threaded pair. The ultrasonic impact power is 6 kW, and the ultrasonic impact duration is 8 s.

[0066] Example 5

[0067] An embodiment of the present invention provides a manufacturing method of a lock-resistant bolt, which specifically includes:

[0068] S1, Use metals Fe, Mn, Si, Cr, Ni, Gd, and Y with industrial-grade purity to configure an alloy with the composition of Fe 64 Mn22 Si 6 Cr 2 Ni 2 Gd 1 Y 3 An alloy, with the subscript being the mass percentage, is melted into an alloy ingot using a vacuum induction furnace;

[0069] S2, The alloy ingot is placed in an annealing furnace and heated to 1160 °C, held for 25 h for high-temperature diffusion annealing, and rolled into a rod with a diameter of 20 mm (equivalent to the first alloy rod);

[0070] S3, The 20-mm rod is stretched by 8% along the axis direction to obtain the second alloy rod;

[0071] S4, The stretched second alloy rod is processed into a bolt, and the bolt is combined with a nut and a washer to form a thread pair;

[0072] S5, The manufactured thread pair is installed on a preset use device, and ultrasonic impact is applied to the bolt in the thread pair. The ultrasonic impact power is 8 kW, and the ultrasonic impact duration is 8 s.

[0073] Example 6

[0074] The embodiments of the present invention propose a manufacturing method and a using method for a self-locking bolt, specifically including:

[0075] S1, Using industrial-grade pure metals Fe, Mn, Si, Cr, Ni, Gd, and Y, configure an alloy with the components of Fe 61 Mn 20 Si 4 Cr 9 Gd 4 Y 2 An alloy, with the subscript being the mass percentage, is melted into an alloy ingot using a vacuum induction furnace;

[0076] S2, The alloy ingot is placed in an annealing furnace and heated to 1200 °C, held for 15 h for high-temperature diffusion annealing, and rolled into a rod with a diameter of 25 mm (equivalent to the first alloy rod);

[0077] S3, The 25-mm rod is stretched by 10% along the axis direction to obtain the second alloy rod;

[0078] S4, The stretched second alloy rod is processed into a bolt, and the bolt is combined with a nut and a washer to form a thread pair;

[0079] S5, The manufactured thread pair is installed on a preset use device, and ultrasonic impact is applied to the bolt in the thread pair. The ultrasonic impact power is 10 kW, and the ultrasonic impact duration is 10 s.

[0080] Comparative Example 1

[0081] The difference between Comparative Example 1 and Example 1 is that in S5, to cause the martensite-to-austenite transformation of the bolt, it is completed by heating the thread pair to 350 °C and holding for 30 min.

[0082] Comparative Example 2

[0083] The difference between Comparative Example 2 and Example 2 is that in S5, to cause the martensite-to-austenite transformation of the bolt, it is completed by heating the thread pair to 350 °C and holding for 30 min.

[0084] Comparative Example 3

[0085] The difference between Comparative Example 3 and Example 3 is that in S5, to cause the martensite-to-austenite transformation of the bolt, it is completed by heating the thread pair to 350 °C and holding for 30 min.

[0086] Comparative Example 4

[0087] The difference between Comparative Example 4 and Example 4 is that in S5, to cause the martensite-to-austenite transformation of the bolt, it is completed by heating the thread pair to 350 °C and holding for 30 min.

[0088] Comparative Example 5

[0089] The difference between Comparative Example 5 and Example 5 is that in S5, to cause the martensite-to-austenite transformation of the bolt, it is completed by heating the thread pair to 350 °C and holding for 30 min.

[0090] Comparative Example 6

[0091] The difference between Comparative Example 6 and Example 6 is that in S5, to cause the martensite-to-austenite transformation of the bolt, it is completed by heating the thread pair to 350 °C and holding for 30 min.

[0092] Application Example

[0093] Select Example 1 to Example 6 to propose a manufacturing method and a using method of a locking prevention bolt, and Comparative Example 1 to Comparative Example 6 to propose a manufacturing method and a using method of a locking prevention bolt for testing;

[0094] Respectively detect the residual martensite content inside the bolts of Example 1 to Example 6 and conduct a transverse vibration test on the thread pair, and detect the residual martensite content inside the bolts of Comparative Example 1 to Comparative Example 6 and conduct a transverse vibration test on the thread pair through existing mature test methods; among them, the amplitude of the transverse vibration test of the thread pair is set to 0.5 mm, the vibration frequency is 10 HZ, and the vibration period is 2000;

[0095] The results of the remaining martensite content inside the bolt and the ratio of the residual pre-tightening force to the initial pre-tightening force of the thread pair after the transverse vibration test obtained through testing are shown in Table 1:

[0096] Table 1 Test Results

[0097] Remaining martensite content Ratio of residual pre-tightening force to initial pre-tightening force Example 1 5％ 86％ Example 2 3％ 89％ Example 3 5％ 91％ Example 4 4％ 87％ Example 5 4％ 88％ Example 6 3％ 92％ Comparative Example 1 9％ 71％ Comparative Example 2 10％ 74％ Comparative Example 3 11％ 72％ Comparative Example 4 12％ 76％ Comparative Example 5 10％ 73％ Comparative Example 6 12％ 75％

[0098] Referring to Table 1, compared with Comparative Examples 1 to 5, for the manufacturing method and usage method of a locknut bolt proposed in Embodiments 1 to 5 of the present invention, the residual amount of martensite in the bolt is significantly lower than that of the traditional method, and under the same vibration conditions, the ratio of the overall residual pre-tightening force to the initial pre-tightening force is increased by 10% compared with Comparative Examples 1 to 5, indicating that the pre-tightening force attenuation rate of the manufacturing method and usage method of a locknut bolt proposed in the embodiments of the present invention is significantly reduced.

[0099] As an example of the embodiment of the present invention, refer to Figure 2 , Figure 2 which is a schematic diagram of the pre-tightening force decay curve under the transverse vibration load of a manufacturing method of a locknut bolt provided in an embodiment of the present invention Figure 1 ; as Figure 2 shown, during the change of the vibration cycle from 0 to 2000 for Embodiment 1 and Comparative Example 1, the pre-tightening force of Comparative Example 1 is always lower than that of Embodiment 1. In addition, the change range of the pre-tightening force of Embodiment 1 is smaller than that of Comparative Example 1, indicating that the vibration resistance performance of the bolt in Embodiment 1 is better than that of Comparative Example 1;

[0100] Refer to Figure 3 , Figure 3 which is a schematic diagram of the pre-tightening force decay curve under the transverse vibration load of a manufacturing method of a locknut bolt provided in an embodiment of the present invention Figure 2 ; as Figure 3 shown, during the change of the vibration cycle from 0 to 2000 for Embodiment 2 and Comparative Example 2, the pre-tightening force of Comparative Example 2 is always lower than that of Embodiment 2. In addition, the change range of the pre-tightening force of Embodiment 2 is smaller than that of Comparative Example 2, indicating that the vibration resistance performance of the bolt in Embodiment 2 is better than that of Comparative Example 2;

[0101] Refer to Figure 4 , Figure 4 which is a schematic diagram of the pre-tightening force decay curve under the transverse vibration load of a manufacturing method of a locknut bolt provided in an embodiment of the present invention Figure 3 ; as Figure 4 shown, during the change of the vibration cycle from 0 to 2000 for Embodiment 3 and Comparative Example 3, the pre-tightening force of Comparative Example 3 is always lower than that of Embodiment 3. In addition, the change range of the pre-tightening force of Embodiment 3 is smaller than that of Comparative Example 3, indicating that the vibration resistance performance of the bolt in Embodiment 3 is better than that of Comparative Example 3;

[0102] Participate in Figure 5 , Figure 5 Schematic diagram of the pre-tightening force decay curve under the lateral vibration load of a manufacturing method of a locknut provided in an embodiment of the present invention Figure 4 As Figure 5 shown, during the change of the vibration cycle from 0 to 2000 in Example 4 and Comparative Example 4, the pre-tightening force of Comparative Example 4 is always lower than that of Example 4. In addition, the change amplitude of the pre-tightening force of Example 4 is smaller than that of Comparative Example 4, indicating that the vibration resistance performance of the bolt in Example 4 is better than that of Comparative Example 4;

[0103] Refer to Figure 6 , Figure 6 Schematic diagram of the pre-tightening force decay curve under the lateral vibration load of a manufacturing method of a locknut provided in an embodiment of the present invention Figure 5 As Figure 6 shown, during the change of the vibration cycle from 0 to 2000 in Example 5 and Comparative Example 5, the pre-tightening force of Comparative Example 5 is always lower than that of Example 5. In addition, the change amplitude of the pre-tightening force of Example 5 is smaller than that of Comparative Example 5, indicating that the vibration resistance performance of the bolt in Example 5 is better than that of Comparative Example 5;

[0104] Refer to Figure 7 , Figure 7 Schematic diagram of the pre-tightening force decay curve under the lateral vibration load of a manufacturing method of a locknut provided in an embodiment of the present invention Figure 6 As Figure 7 shown, during the change of the vibration cycle from 0 to 2000 in Example 6 and Comparative Example 6, the pre-tightening force of Comparative Example 6 is always lower than that of Example 6. In addition, the change amplitude of the pre-tightening force of Example 6 is smaller than that of Comparative Example 6, indicating that the vibration resistance performance of the bolt in Example 6 is better than that of Comparative Example 6;

[0105] In summary, by changing different vibration cycles, the thread pairs of Examples 1 to 6 and Comparative Examples 1 to 6 are subjected to a lateral vibration test. The results are as Figures 2 to 7 shown. The manufacturing method and the use method of the locknut proposed in Examples 1 to 6 of the present invention are significantly superior to the traditional preparation process in terms of the vibration resistance performance of the thread pair, and are particularly prominent under long-term vibration conditions.

[0106] An embodiment of the present invention provides a manufacturing method and a usage method for a lock - preventing bolt. An alloy is obtained through melting, and the alloy is subjected to homogenization annealing and tensile deformation, causing a transformation from austenite to martensite inside the alloy. At this time, when processed into a bolt, its internal characteristics will be retained. Then, it is combined with a nut to form a thread pair. Subsequently, during the usage process, the manufactured thread pair is installed on a preset usage device. At this time, the thread pair is in a martensite state. Through ultrasonic impact, the unstable martensite structure inside the bolt is reversely transformed into a stable austenite structure, and shrinkage occurs along the axial direction of the bolt. Thus, recovery stress can be generated in the bolt without a heating process, increasing the self - locking frictional force between the bolt and the nut. This process can achieve the purpose of anti - vibration and anti - loosening without a heating step, improving the usage reliability of the bolt during service.

[0107] Example 7

[0108] See Figure 8 , Figure 8 which is a schematic diagram of the module structure of a manufacturing and application system for a lock - preventing bolt provided by an embodiment of the present invention. As Figure 8 shown, an embodiment of the present invention provides a manufacturing and application system for a lock - preventing bolt, including: a manufacturing module 201 and a usage module 202; the manufacturing module 201 is used to melt a mixture of preset proportion alloy components to obtain an alloy ingot; perform homogenization annealing on the alloy ingot and roll it into a first alloy rod; perform tensile deformation on the first alloy rod to cause the first alloy rod to transform from austenite to martensite, obtaining a second alloy rod; process the second alloy rod into a bolt and combine it with a nut to form a thread pair; the usage module 202 is used to install the thread pair manufactured by the manufacturing module onto a preset usage device, and perform ultrasonic impact on the bolt in the thread pair to cause the reverse transformation of the bolt from martensite to austenite and generate recovery stress for self - locking with the nut.

[0109] As an example of an embodiment of the present invention, the usage module 202 is used to install the thread pair manufactured by the manufacturing module onto a preset usage device, and perform ultrasonic impact on the bolt in the thread pair to cause the reverse transformation of the bolt from martensite to austenite and generate recovery stress for self - locking with the nut, including: a thread - pair installation unit 301 and an ultrasonic - impact unit 302; the thread - pair installation unit 301 is used to install the manufactured thread pair onto the device based on a preset position and a preset direction and tighten the nut on the bolt; the ultrasonic - impact unit 302 is used to perform ultrasonic impact on the bolt in the thread pair through an ultrasonic generator based on a preset impact angle and a preset second time, causing the reverse transformation of the bolt from martensite to austenite and generating recovery stress for self - locking with the nut.

[0110] An application system of a lock - preventing bolt is proposed in an embodiment of the present invention. An alloy is obtained through smelting by a manufacturing module, and the alloy is subjected to homogenization annealing and tensile deformation, so that the internal structure of the alloy transforms from austenite to martensite. At this time, when processed into a bolt, its internal characteristics will be retained. Then, it is combined with a nut to form a thread pair. Subsequently, during the use process by a using module, only ultrasonic impact on the bolt is required, which can make the unstable martensite structure inside the bolt transform into a stable austenite structure, shrink along the axial direction of the bolt, and thus generate a recovery stress in the bolt without a heating process, increasing the self - locking friction force between the bolt and the nut, achieving the purpose of anti - vibration and lock - prevention, and improving the reliability of the bolt during service.

[0111] The above - mentioned is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

[0112] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0113] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

Claims

1. A method for manufacturing an anti-loosening bolt, characterized in that: include: Melting the ingredients of the preset alloy components to obtain alloy ingots; performing homogenization annealing on the alloy ingot, and rolling the alloy ingot into a first alloy rod; Performing tensile deformation on the first alloy rod to transform the first alloy rod from austenite to martensite to obtain a second alloy rod; The second alloy rod is processed into a bolt and combined with a nut to form a thread pair.

2. A method for manufacturing a locking bolt according to claim 1, characterized in that: The step of smelting the ingredients of the preset alloy components to obtain the alloy ingot comprises: The preset ratio is a mass percentage; The alloy components include: Mn, Si, Cr, Ni, Gd and Y; The mass percentage of Mn is 15% to 25%; The mass percentage of Si is 3% to 6%; The mass percentage of Cr is 2% to 10%; The mass percentage of Ni is 1% to 10%; The mass percentage of Gd is 1% to 5%; The mass percentage of Y is 1% to 3%.

3. A method for manufacturing a locking bolt according to claim 1, characterized in that: The alloy ingot is subjected to homogenization annealing and rolled into a first alloy rod, comprising: The alloy ingot is subjected to homogenization annealing at a temperature of 1100° C. to 1200° C. and a time of 10 h to 30 h, and is then rolled into a first alloy rod.

4. A method for manufacturing a locking bolt according to claim 1, characterized in that: The first alloy rod is subjected to tensile deformation to transform the first alloy rod from austenite to martensite to obtain a second alloy rod, comprising: The first alloy rod is subjected to tensile deformation with a deformation amount of 3% to 10%, so that the first alloy rod is transformed from austenite to martensite to obtain a second alloy rod.

5. A method for using an anti-loosening bolt, characterized in that: include: The manufactured thread pair is installed on the preset use equipment, and the bolts in the thread pair are subjected to ultrasonic impact, so that the bolts are reversely transformed from martensite to austenite and generate recovery stress and nut self-locking.

6. A method for using a locking bolt as claimed in claim 5, characterized in that: The manufactured thread pair is installed on the preset use equipment, and the bolts in the thread pair are subjected to ultrasonic impact to make the bolts reversely transform from martensite to austenite and generate recovery stress and nut self-locking, including: Based on the preset position and preset direction, the manufactured thread pair is installed on the preset use equipment, and the nut is tightened on the bolt; Based on the preset impact angle and the preset impact time, the ultrasonic generator is used to perform ultrasonic impact on the bolts in the threaded pair, so that the bolts undergo reverse transformation from martensite to austenite and generate recovery stress and nut self-locking.

7. A method for using a locking bolt according to any one of claims 5 or 6, characterized in that: Also includes: The power range of the ultrasonic impact is 1 kW to 10 kW.

8. A method for using a locking bolt according to any one of claims 5 or 6, characterized in that: Also includes: The impact time of the ultrasonic impact is 2s to 10s.

9. An application system for anti-loosening bolts, characterized in that: include: Manufacturing modules and using modules; The manufacturing module is used to melt ingredients with preset alloy components to obtain alloy ingots; The alloy ingot is homogenized and annealed, and rolled into a first alloy rod; the first alloy rod is stretched and deformed to transform the first alloy rod from austenite to martensite to obtain a second alloy rod; the second alloy rod is processed into a bolt, and combined with a nut to form a threaded pair; The use module is used to install the threaded pair manufactured by the manufacturing module on a preset use device, and perform ultrasonic impact on the bolts in the threaded pair to make the bolts reversely transform from martensite to austenite and generate recovery stress and nut self-locking.

10. The application system of anti-loosening bolts according to claim 9, characterized in that: The use module is used to install the thread pair manufactured by the manufacturing module on a preset use device, and perform ultrasonic impact on the bolts in the thread pair to make the bolts reversely transform from martensite to austenite and generate recovery stress and nut self-locking, including: Threaded pair mounting unit and ultrasonic impact unit; The thread pair installation unit is used to install the manufactured thread pair on the equipment and tighten the nut on the bolt based on a preset position and a preset direction; The ultrasonic impact unit is used to perform ultrasonic impact on the bolts in the threaded pair through an ultrasonic generator based on a preset impact angle and a preset second time, so that the bolts undergo reverse transformation from martensite to austenite and generate recovery stress and nut self-locking.

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