Production process of high-low tooth cut bolt

Abstract

The invention relates to the technical field of fastener production, in particular to a high-low tooth notched bolt production process which comprises the following steps: S1, according to the strength grade and application of a bolt, carbon steel, stainless steel or alloy steel is adopted as a corresponding material for machining the bolt; s2, the hardness of the material is reduced through an annealing process, the plasticity of the material is improved, a better material state is provided for subsequent processing, the material is heated to a specific temperature and kept for a period of time, and then the material is slowly cooled; s3, oxide skin and impurities on the surface of the material are removed through an acid pickling or mechanical shelling process, and the surface quality is improved; s4, enabling the material to reach the required diameter and strength through a cold drawing process; s5, high pressure is applied to the material through the mold at the room temperature, so that the material is formed; and S6, pressure is applied to the rod part of the bolt through the thread rolling die, so that the thread part is formed. And the thread rolling process can maintain the strength and precision of threads. The purpose of the invention is to guarantee the daily use of the high-low tooth cut bolt.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of fastener production, in particular to a production process of a high-low tooth cut bolt. BACKGROUND

[0002] The high-low tooth cut bolt is a special threaded fastener, and the thread profile of the bolt is arranged in high-low alternation. The design enables the bolt to provide greater friction and tensile force when fastened, thereby enhancing the firmness and stability of the connection.

[0003] In the related art, when the bolt connection is in a vibration environment, the dynamic load generated by the vibration can cause the relative displacement of the thread pair between the bolt and the nut. This displacement can be manifested as a small angle of rotation, and even if the rotation amplitude is very small, the pre-tightening force between the thread pairs will be gradually weakened. This causes the fastening force of the bolt to be easily affected in the vibration environment, thereby causing the problem of decreased bolt connection strength, resulting in poor bolt stability and being not conducive to long-term use of the bolt. SUMMARY

[0004] The application provides a production process of a high-low tooth cut bolt, which aims to optimize the structure of the high-low tooth cut bolt, so that it can still maintain good fastening force during long-term use in a vibration environment, thereby facilitating the protection of the daily use of the high-low tooth cut bolt.

[0005] The application provides a production process of a high-low tooth cut bolt, which adopts the following technical scheme:

[0006] A production process of a high-low tooth cut bolt, comprising the following steps: S1, according to the strength grade and purpose of the bolt, carbon steel, stainless steel or alloy steel is used as the corresponding material for processing the bolt; S2, the hardness of the material is reduced and the plasticity thereof is improved through an annealing process, so as to provide a better material state for subsequent processing, the material is heated to a specific temperature and maintained for a period of time, and then slowly cooled; S3, the scale and impurities on the surface of the material are removed through an acid pickling or mechanical peeling process to improve the surface quality; S4, the material is made to have a required diameter and strength through a cold drawing process;

[0007] S5, the material is formed by applying high pressure to the material through a die at room temperature; S6, the thread part is formed by applying pressure to the bolt shank through a thread rolling die. The thread rolling process can maintain the strength and precision of the thread; S7, the bolt is heated to an austenitizing temperature and then rapidly cooled to improve the hardness; S8, the strength and toughness of the bolt are verified through a tensile test, a hardness test and the like.

[0008] By adopting the above technical solution, the structure of the high and low tooth cut bolts is optimized, so that they can always maintain good tightening force during long-term use in a vibration environment, which is beneficial to ensure the daily use of the high and low tooth cut bolts.

[0009] Preferably, the bolt includes a first fastening bolt, a second fastening bolt and a reinforcement member, the reinforcement member is integrally formed at the end of the first fastening bolt, the second fastening bolt passes through the first fastening bolt and the reinforcement member in sequence, the first fastening bolt is used to complete the initial fastening of the wall, and the second fastening bolt is used to drive the reinforcement member to increase the connection strength between the wall and the wall.

[0010] By adopting the above technical solution, when the bolt is used, the corresponding screw hole is first opened in the wall, and then the first fastening bolt and the reinforcement are inserted into the screw hole. The wall is fastened by the first fastening bolt and the reinforcement. After the first fastening bolt and the reinforcement are fastened to the wall, the second fastening bolt is rotated, and the second fastening bolt is used to drive the reinforcement to increase the contact area and the fastening force between the wall and the wall. This setting method uses the first fastening bolt, the second fastening bolt and the reinforcement to optimize the structure of the cut bolt, so that it can always maintain a good fastening force during long-term use in a vibration environment, which is conducive to ensuring the daily use of high and low tooth cut bolts.

[0011] Preferably, the reinforcement includes a connecting block, an elastic block and a movable block, the elastic block is integrally formed between the connecting block and the movable block, the end of the first fastening bolt away from the second fastening bolt is integrally connected to the connecting block, the elastic block and the movable block are located on the inner side of the wall, the screw of the second fastening bolt passes through the first fastening bolt, the connecting block and the movable block in sequence, and the end of the second fastening bolt extends out from the end of the movable block, the first fastening bolt and the connecting part are both penetrated by corresponding through holes for the screw of the second fastening bolt to pass through, and a threaded hole is penetrated on the movable block, the screw of the second fastening bolt passes through the first fastening bolt, the connecting block and the movable block in sequence, and the screw of the second fastening bolt and the movable block are threadedly matched.

[0012] By adopting the above technical scheme, after the first fastening bolt and the connecting block preliminarily fasten the wall body, the second fastening bolt is rotated, the second fastening bolt drives the movable block to slide towards the connecting block in the rotating process, the movable block drives the elastic block to tightly contact the inner side of the wall body in the sliding process towards the connecting block, the elastic block increases the contact area between the wall body while tightly contacting the inner side of the wall body, and then the second fastening bolt and the movable block drive the elastic block to increase the connecting strength between the wall body, so that the bolt can always maintain good fastening force during long-time use in a vibrating environment, thereby being beneficial to guarantee the daily use of the bolt.

[0013] Preferably, the elastic block comprises a first block and a second block, one end of the first block is integrally connected with the end of the connecting block, the other end of the first block is integrally connected with the second block, the end of the second block away from the first block is integrally connected with the movable block, the first block and the second block are made of elastic material, the movable block is used to drive the second block to synchronously slide, and the movable block is used to drive the first block to slide towards the wall body, and the first block is used to increase the connecting strength between the wall body.

[0014] By adopting the above technical scheme, when the movable block slides towards the connecting block, the second block is synchronously driven to slide towards the first block, the second block deforms in the sliding process towards the first block, and the first block also deforms correspondingly, the first block moves towards the wall body under the driving of the second block while deforming, and the first block is tightly contacted with the inner side of the wall body. After the first block deforms and is tightly contacted with the inner side of the wall body, the first block effectively increases the contact area between the bolt and the wall body, so that the bolt can always maintain good fastening force during long-time use in a vibrating environment, thereby being beneficial to guarantee the daily use of the bolt.

[0015] Both have certain elasticity. Specifically in use, before the first fastening bolt and the reinforcing member are inserted into the screw hole of the wall, the first block and the second block are in a tightened state, and the two are kept perpendicular to the wall, thereby effectively ensuring that the first fastening bolt and the reinforcing member can be smoothly inserted into the wall. After the second fastening bolt is rotated to drive the movable block to start sliding towards the connecting block, the second block is driven by the movable block to slide and deform synchronously, and the first block is deformed by the second block in the process of sliding and deforming. The first block and the second block expand in this process. The first block changes from the initial state of being perpendicular to the wall to being parallel to the wall. Then the first block effectively increases the contact area between the entire bolt and the wall, thereby effectively improving the strength of the connection between the entire bolt and the wall, so that it can still maintain good fastening force during long-term use in a vibrating environment, thereby facilitating the daily use of the high-low tooth notch bolt.

[0016] Preferably, the first block is integrally provided with anti-slip lines on the side close to the wall.

[0017] By adopting the above technical scheme, after the second block presses the first block against the wall, the anti-slip lines on the first block can further increase the friction between the first block and the wall, thereby facilitating the improvement of the stability of the connection between the first block and the wall.

[0018] Preferably, the connecting block is integrally formed with a guide support at the end away from the first fastening bolt, the guide support is located on the inner side of the first block, a through hole is provided on the guide support for the second fastening bolt to pass through, and the through hole corresponds to the threaded hole on the movable block.

[0019] By adopting the above technical scheme, the guide support can guide the second fastening bolt during insertion and can also stably position it during rotation. At the same time, the guide support can provide stable support force to the entire reinforcing member, thereby facilitating the stability of the entire bolt structure.

[0020] Preferably, the connecting block is integrally formed with a plurality of support protrusions on the circumferential side.

[0021] By adopting the above technical scheme, when the connecting block is inserted into the wall, the support protrusions are stably supported in the screw hole on the wall, and the support protrusions further improve the stability of the entire bolt in supporting the wall.

[0022] Preferably, a clamping assembly is arranged between the end of the first block and the movable block, the clamping assembly comprises a clamping block and a clamping groove, the clamping block is integrally formed on the end of the first block, the clamping groove is arranged on the top of the movable block, the clamping block is supported by elastic material, and limiting plates for limiting the clamping block are integrally formed on the left and right sides of the top of the clamping groove in the horizontal direction.

[0023] By adopting the above technical scheme, before the bolt is inserted into the wall, the clamping block is clamped into the clamping groove, and the two limiting plates limit the clamping block, so that the clamping block is stably clamped in the clamping groove. When the movable block starts to slide, the first block drives the clamping block to move away from the clamping groove during expansion, in this state, the two ends of the clamping block are extruded by the two limiting plates to deform, so that the clamping block smoothly slides out of the clamping groove, and then the first block and the second block can smoothly expand.

[0024] The purpose of adding the clamping assembly is to facilitate the limiting of the positions of the first block and the second block, and when the movable block starts to slide, the first block and the second block can be timely released from the limiting. If there is no clamping assembly, when the bolt is inserted into the wall, the first block and the second block need to be manually pinched to prevent them from expanding due to their own elastic force and thus hinder the insertion of the bolt into the wall. With the clamping assembly, the first block and the second block can be limited by the clamping assembly, and when the movable block starts to slide, the first block and the second block can be timely released from the limiting, which is more convenient to use.

[0025] In summary, the present application has the following at least one beneficial technical effect:

[0026] 1. The bolt is particularly used in the application, first, a corresponding screw hole is formed in the wall, then the first fastening bolt and the reinforcing member are inserted into the screw hole, and the fastening of the wall is completed by the first fastening bolt and the reinforcing member. After the first fastening bolt and the reinforcing member are fastened to the wall, the second fastening bolt is rotated to drive the reinforcing member to increase the contact area between the reinforcing member and the wall and the fastening force between the reinforcing member and the wall. This arrangement uses the first fastening bolt, the second fastening bolt and the reinforcing member to optimize the notch bolt structure, so that it can maintain good fastening force during long-term use in a vibrating environment, thereby facilitating the daily use of the high-low tooth notch bolt.

[0027] 2. During specific use, when the movable block slides toward the connecting block, it synchronously drives the second block to slide toward the first block. The second block deforms during the sliding process toward the first block, driving the first block to deform accordingly. As the first block deforms, it moves toward the wall under the drive of the second block until the first block is completely in contact with the inner side of the wall. After the first block is deformed and in contact with the inner side of the wall, the first block effectively increases the contact area between the entire bolt and the wall, allowing it to maintain good tightening force during long-term use in a vibrating environment, thereby facilitating the daily use of high and low tooth notch bolts.

[0028] Both of them have a certain elasticity. Specifically, during use, before the first fastening bolt and the reinforcement are inserted into the screw hole of the wall, the first block and the second block are both in a tightened state, and the two remain perpendicular to the wall, thereby effectively ensuring that the first fastening bolt and the reinforcement can be smoothly inserted into the wall. When the second fastening bolt is rotated to drive the movable block to start sliding in the direction close to the connecting block, the second block slides and deforms synchronously under the drive of the movable block. The second block drives the first block to deform in the process of sliding and deforming, and the first block and the second block expand in this process. The first block changes from the initial perpendicular state to the wall to the parallel state with the wall. The first block effectively increases the contact area between the entire bolt and the wall, thereby effectively improving the strength of the connection between the entire bolt and the wall, so that it can always maintain a good fastening force during long-term use in a vibration environment, which is beneficial to ensure the daily use of high and low tooth notch bolts;

[0029] 3. Before the bolt is inserted into the wall, the clamping block is inserted into the slot. Two limit plates limit the clamping block, ensuring it is stably fixed in the slot. When the movable block begins to slide, the first block expands, driving the clamping block away from the slot. In this state, the two ends of the clamping block are squeezed and deformed by the two limit plates, allowing it to slide out of the slot smoothly, allowing the first and second blocks to expand smoothly.

[0030] The purpose of adding the clamping assembly is to facilitate limiting the position of the first block and the second block, and at the same time, when the movable block begins to slide, the first block and the second block can be promptly released from the limit. Without the clamping assembly, when the bolt is inserted into the wall, it is necessary to manually pinch the first block and the second block to prevent them from expanding due to their own elastic force and thus hindering the insertion of the bolt into the wall. With the clamping assembly, the first block and the second block can be limited by the clamping assembly, and when the movable block begins to slide, the first block and the second block can be promptly released from the limit, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a structural schematic diagram of the whole embodiment of the present application;

[0032] Figure 2 is a structural schematic diagram of the embodiment of the present application specifically showing the position relationship of the connecting block;

[0033] Figure 3 is a structural schematic diagram of the embodiment of the present application specifically showing the position relationship of the elastic block in different states;

[0034] Figure 4 is a structural schematic diagram of the embodiment of the present application specifically showing the position relationship of the threaded hole on the movable block;

[0035] Figure 5 is Figure 4 is an enlarged schematic diagram of A in FIG. 8.

[0036] Mark: 1, first fastening bolt; 2, second fastening bolt; 3, reinforcing part; 4, connecting block; 5, elastic block; 51, first block; 52, second block; 6, movable block; 7, threaded hole; 8, guiding support; 9, support protrusion; 10, clamping block; 11, clamping groove; 12, limiting plate. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying drawings. Figure 1 - the accompanying drawings Figure 5 The present application will be further described in detail.

[0038] Embodiment:

[0039] The embodiment of the present application discloses a production process of a high-low tooth cutout bolt, comprising the following steps: S1, according to the strength grade and purpose of the bolt, carbon steel, stainless steel or alloy steel is used as the corresponding material for processing the bolt; S2, the hardness of the material is reduced and the plasticity is improved through the annealing process, so as to provide a better material state for subsequent processing, the material is heated to a specific temperature and kept for a period of time, and then slowly cooled; S3, the oxide skin and impurities on the surface of the material are removed through pickling or mechanical peeling process to improve the surface quality; S4, the material is made to reach the required diameter and strength through the cold drawing process; S5, the material is subjected to high pressure through a die at room temperature to make it form; S6, the bolt rod is subjected to pressure through a thread rolling die to make the threaded part form. The thread rolling process can maintain the strength and precision of the thread; S7, the bolt is heated to the austenitizing temperature and then quickly cooled to improve the hardness; S8, the strength and toughness of the bolt are verified through tensile test, hardness test and the like.

[0040] The high-low tooth cutout bolt is provided with anti-loose protruding teeth at the bottom of the nut, and corresponding anti-skid teeth are additionally provided on the teeth on the side of the screw rod, so that the fastening force of the bolt is further strengthened by the anti-loose protruding teeth and the anti-skid teeth, thereby effectively improving the stability of the bolt connection strength.

[0041] Referring to Figure 1 and Figure 2 , the high-low tooth notch bolt comprises a first fastening bolt 1, a second fastening bolt 2 and a reinforcing piece 3, the reinforcing piece 3 is integrally formed at the end of the first fastening bolt 1, and the second fastening bolt 2 penetrates the first fastening bolt 1 and the reinforcing piece 3 in turn. The bolt is particularly applied, first, a corresponding screw hole is formed in the wall, then the first fastening bolt 1 and the reinforcing piece 3 are inserted into the screw hole, and the fastening of the wall is completed by the first fastening bolt 1 and the reinforcing piece 3. After the first fastening bolt 1 and the reinforcing piece 3 are fastened to the wall, the second fastening bolt 2 is rotated, and the second fastening bolt 2 is used to drive the reinforcing piece 3 to increase the contact area between the reinforcing piece 3 and the wall and the fastening force between the reinforcing piece 3 and the wall. This arrangement uses the first fastening bolt 1, the second fastening bolt 2 and the reinforcing piece 3 to optimize the structure of the notch bolt, so that it can still maintain good fastening force during long-term use in a vibrating environment, thereby facilitating the daily use of the high-low tooth notch bolt.

[0042] Specifically, referring to Figure 2 and Figure 3 , the shank of the second fastening bolt 2 penetrates the first fastening bolt 1 and the reinforcing piece 3 in turn, and the nut of the second fastening bolt 2 is in close contact with the nut of the first fastening bolt 1. The reinforcing piece 3 comprises a connecting block 4, an elastic block 5 and a movable block 6, the elastic block 5 is integrally formed between the connecting block 4 and the movable block 6, and the end of the first fastening bolt 1 away from the second fastening bolt 2 is integrally connected with the connecting block 4. In specific application, the first fastening bolt 1 and the connecting block 4 are located in the screw hole of the wall, and the first fastening bolt 1 and the connecting block 4 are used to complete the preliminary fastening of the wall. The elastic block 5 and the movable block 6 are located inside the wall, the shank of the second fastening bolt 2 penetrates the first fastening bolt 1, the connecting block 4 and the movable block 6 in turn, and the end of the second fastening bolt 2 extends from the end of the movable block 6.

[0043] Specifically, referring to Figure 2 and Figure 4 , the first fastening bolt 1 and the connecting block 4 are both provided with corresponding through holes for the shank of the second fastening bolt 2 to penetrate, and the movable block 6 is provided with a threaded hole 7, the shank of the second fastening bolt 2 penetrates the first fastening bolt 1, the connecting block 4 and the movable block 6 in turn, and the shank of the second fastening bolt 2 is in threaded cooperation with the movable block 6.

[0044] When the first fastening bolt 1 and the connecting block 4 complete the initial fastening to the wall, the second fastening bolt 2 is rotated, and in the process of rotation, the movable block 6 is driven to slide towards the connecting block 4, and in the process of sliding towards the connecting block 4, the elastic block 5 is driven to tightly contact the inner side of the wall, and at the same time, the elastic block 5 increases the contact area between the wall, and then through the second fastening bolt 2 and the movable block 6, the elastic block 5 increases the connection strength between the wall, so that it can still maintain good fastening force during long-term use in a vibrating environment, thereby facilitating the daily use of the high-low tooth notch bolt.

[0045] Specifically, referring to Figure 2 、 Figure 3 and Figure 4 , the elastic block 5 includes a first block 51 and a second block 52, one end of the first block 51 is integrally connected with the end of the connecting block 4, the other end of the first block 51 is integrally connected with the second block 52, and the end of the second block 52 away from the first block 51 is integrally connected with the movable block 6. In specific use, when the movable block 6 slides towards the connecting block 4, the second block 52 is simultaneously driven to slide towards the first block 51, and in the process of sliding towards the first block 51, the second block 52 deforms and drives the first block 51 to deform correspondingly, and at the same time, the first block 51 is driven by the second block 52 to move towards the wall until the first block 51 is tightly attached to the inner side of the wall. After the first block 51 deforms and is tightly attached to the inner side of the wall, the contact area between the entire bolt and the wall is effectively increased by the first block 51, so that it can still maintain good fastening force during long-term use in a vibrating environment, thereby facilitating the daily use of the high-low tooth notch bolt.

[0046] The first block 51 and the second block 52 are made of elastic material, and both have a certain degree of elasticity. Specifically, during use, before the first fastening bolt 1 and the reinforcement 3 are inserted into the screw hole of the wall, the first block 51 and the second block 52 are both in a tightened state, and the two remain perpendicular to the wall, thereby effectively ensuring that the first fastening bolt 1 and the reinforcement 3 can be smoothly inserted into the wall. When the second fastening bolt 2 is rotated to drive the movable block 6 to start sliding toward the connecting block 4, the second block 52 slides and deforms synchronously under the drive of the movable block 6. In the process of sliding and deforming, the second block 52 drives the first block 51 to deform, and the first block 51 and the second block 52 expand in this process. The first block 51 changes from an initial perpendicular state to the wall to a parallel state to the wall. Furthermore, the first block 51 effectively increases the contact area between the entire bolt and the wall, thereby effectively improving the strength of the connection between the entire bolt and the wall, so that it can always maintain good fastening force during long-term use in a vibration environment, which is beneficial to ensure the daily use of high and low tooth cut bolts.

[0047] Furthermore, the first block 51 is integrally engraved with anti-slip grooves on one side close to the wall. After the second block 52 presses the first block 51 against the wall, the anti-slip grooves on the first block 51 can further increase the friction between the first block 51 and the wall, thereby helping to improve the stability of the connection between the first block 51 and the wall.

[0048] Further, refer to Figure 2 and Figure 4 A guide support 8 is integrally formed on the end of the connecting block 4 away from the first fastening bolt 1. The guide support 8 is located inside the first block 51. A through hole is also formed in the guide support 8 for the insertion of the second fastening bolt 2, and this through hole corresponds to the threaded hole 7 in the movable block 6. The guide support 8 guides the second fastening bolt 2 during insertion and stabilizes it during rotation. Furthermore, the guide support 8 provides stable support for the entire reinforcement 3, thereby ensuring the stability of the entire bolt machine structure.

[0049] Further, refer to Figure 2 A plurality of supporting protrusions 9 are integrally formed on the peripheral side of the connecting block 4. When the connecting block 4 is extended into the wall, these supporting protrusions 9 are stably supported in the screw holes on the wall. These supporting protrusions 9 are used to further improve the stability of the overall bolt support on the wall.

[0050] Further, the end of the first block 51 and the movable block 6 are provided with a clamping assembly, when the first fastening bolt 1, the second fastening bolt 2 and the reinforcing piece 3 are inserted into the wall, the end of the first block 51 is clamped on the movable block 6 through the corresponding clamping assembly, the first block 51 is limited by the clamping assembly, thereby effectively preventing it from expanding due to its own elasticity, so that it remains perpendicular to the wall and is smoothly inserted into the wall. When the movable block 6 starts to slide, the clamping assembly is disconnected so that the first block 51 and the second block 52 start to expand.

[0051] Specifically, referring to Figure 3 , Figure 4 and Figure 5 , the clamping assembly includes a clamping block 10 and a clamping groove 11, the clamping block 10 is integrally formed at the end of the first block 51, and the clamping groove 11 is formed at the top of the movable block 6. The clamping block 10 is supported by a elastic material, which is convenient for deformation, and the whole is in the shape of a rhombus. The clamping groove 11 is integrally formed with a limiting plate 12 on both sides of the top in the horizontal direction, and the limiting plate 12 is in the shape of a cuboid. Before the bolt is inserted into the wall, the clamping block 10 is clamped into the clamping groove 11, and the two limiting plates 12 limit the clamping block 10, so that it is stably clamped in the clamping groove 11. When the movable block 6 starts to slide, the first block 51 drives the clamping block 10 to move away from the clamping groove 11 in the process of expansion, in this state, the two ends of the clamping block 10 are extruded by the two limiting plates 12 to deform, so as to smoothly slide out of the clamping groove 11, thereby enabling the first block 51 and the second block 52 to smoothly expand.

[0052] The purpose of adding the clamping assembly is to facilitate the limiting of the positions of the first block 51 and the second block 52, and when the movable block 6 starts to slide, the first block 51 and the second block 52 can be timely released from the limitation. If there is no clamping assembly, when the bolt is inserted into the wall, the first block 51 and the second block 52 need to be manually pinched to prevent them from expanding due to their own elasticity and thereby hinder the insertion of the bolt into the wall. With the clamping assembly, the first block 51 and the second block 52 can be limited by the clamping assembly, and when the movable block 6 starts to slide, the first block 51 and the second block 52 can be timely released from the limitation, which is more convenient to use.

[0053] The implementation principle of the production process of the high-low tooth cutout bolt according to the embodiment of the application is as follows:

[0054] The screw rod of the second fastening bolt 2 penetrates the first fastening bolt 1 and the reinforcing piece 3 in sequence, and the nut of the second fastening bolt 2 is in close contact with the nut of the first fastening bolt 1. The reinforcing piece 3 comprises a connecting block 4, an elastic block 5 and a movable block 6, the elastic block 5 is integrally formed between the connecting block 4 and the movable block 6, and the end of the first fastening bolt 1 away from the second fastening bolt 2 is integrally connected with the connecting block 4. In specific application, the first fastening bolt 1 and the connecting block 4 are located in the screw hole of the wall body, and the first fastening bolt 1 and the connecting block 4 are used to complete the preliminary fastening of the wall body. The elastic block 5 and the movable block 6 are located inside the wall body, the screw rod of the second fastening bolt 2 penetrates the first fastening bolt 1, the connecting block 4 and the movable block 6 in sequence, and the end of the second fastening bolt 2 extends from the end of the movable block 6.

[0055] Specifically, the first fastening bolt 1 and the connecting block are both provided with corresponding through holes for the screw rod of the second fastening bolt 2 to penetrate, and the movable block 6 is provided with a threaded hole 7, the screw rod of the second fastening bolt 2 penetrates the first fastening bolt 1, the connecting block 4 and the movable block 6 in sequence, and the screw rod of the second fastening bolt 2 is in threaded cooperation with the movable block 6.

[0056] When the first fastening bolt 1 and the connecting block 4 complete the preliminary fastening of the wall body, the second fastening bolt 2 is rotated, and in the process of rotation, the movable block 6 is driven to slide towards the connecting block 4, and in the process of sliding towards the connecting block 4, the elastic block 5 is driven to be in close contact with the inside of the wall body, and the elastic block 5 increases the contact area between the wall body while being in close contact with the inside of the wall body, and then the second fastening bolt 2 and the movable block 6 drive the elastic block 5 to increase the connection strength between the wall body, so that it can always maintain good fastening force during long-term use in a vibrating environment, thereby facilitating the protection of the daily use of the high-low tooth notch bolt.

[0057] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A production process for high and low thread notch bolts, characterized by: The following steps are involved: S1. Use carbon steel, stainless steel or alloy steel as the corresponding material for processing bolts according to the strength grade and purpose of the bolts; S2. Use annealing process to reduce the hardness of the material and improve its plasticity to provide a better material state for subsequent processing. The material is heated to a specific temperature and maintained for a period of time, and then slowly cooled; S3. Use pickling or mechanical peeling process to remove the oxide scale and impurities on the surface of the material to improve the surface quality; S4. Use cold drawing process to make the material reach the required diameter and strength; S5. Apply high pressure to the material through the mold at room temperature to form it; S6. Apply pressure to the bolt rod through the thread rolling die to form the thread part. The thread rolling process can maintain the strength and precision of the thread; S7. Heat the bolt to the austenitizing temperature and then cool it rapidly to increase the hardness. S8. Verify the strength and toughness of the bolt through tensile tests, hardness tests, etc.

2. The production process of a high and low pitched bolt according to claim 1, characterized in that: The bolt comprises a first fastening bolt (1), a second fastening bolt (2) and a reinforcement (3); the reinforcement (3) is integrally formed at the end of the first fastening bolt (1); the second fastening bolt (2) passes through the first fastening bolt (1) and the reinforcement (3) in sequence; the first fastening bolt (1) is used to complete the initial fastening of the wall; the second fastening bolt (2) is used to drive the reinforcement (3) to increase the connection strength between the wall and the reinforcement (3).

3. The production process of a high and low pitch bolt according to claim 2, characterized in that: The reinforcing member (3) includes a connecting block (4), an elastic block (5) and a movable block (6), the elastic block (5) is integrally formed between the connecting block (4) and the movable block (6), the end of the first fastening bolt (1) away from the second fastening bolt (2) is integrally connected to the connecting block (4), the elastic block (5) and the movable block (6) are located on the inner side of the wall, the screw of the second fastening bolt (2) passes through the first fastening bolt (1), the connecting block (4) and the movable block (6) in sequence, and the end of the second fastening bolt (2) extends from the end of the movable block (6), the first fastening bolt (1) and the connecting portion are both provided with corresponding through holes for the screw of the second fastening bolt (2) to pass through, and the movable block (6) is provided with a threaded hole (7), the screw of the second fastening bolt (2) passes through the first fastening bolt (1), the connecting block (4) and the movable block (6) in sequence, and the screw of the second fastening bolt (2) and the movable block (6) are threadedly matched.

4. The production process of a high and low pitch notch bolt according to claim 3, characterized in that: The elastic block (5) comprises a first block (51) and a second block (52); one end of the first block (51) is integrally connected to the end of the connecting block (4); the other end of the first block (51) is integrally connected to the second block (52); an end of the second block (52) away from the first block (51) is integrally connected to the movable block (6); the first block (51) and the second block (52) are made of elastic material; the movable block (6) is used to drive the second block (52) to slide synchronously and at the same time drive the first block (51) to slide in a direction close to the wall; the first block (51) is used to increase the connection strength between the first block and the wall.

5. The production process of a high and low pitch notch bolt according to claim 4, characterized in that: The first block (51) is integrally engraved with anti-slip grooves on one side close to the wall.

6. The production process of a high and low pitch notch bolt according to claim 5, characterized in that: A guide support (8) is integrally formed on one end of the connecting block (4) away from the first fastening bolt (1), and the guide support (8) is located on the inner side of the first block (51). A through hole is provided on the guide support (8) for the screw rod of the second fastening bolt (2) to pass through, and the through hole corresponds to the threaded hole (7) on the movable block (6).

7. The production process of a high and low pitch notch bolt according to claim 6, characterized in that: A plurality of supporting protrusions (9) are integrally formed on the peripheral side of the connecting block (4).

8. The production process of a high and low pitched bolt according to claim 7, characterized in that: A clamping assembly is provided between the end of the first block (51) and the movable block (6), the clamping assembly comprising a clamping block (10) and a clamping slot (11), the clamping block (10) being integrally formed at the end of the first block (51), the clamping slot (11) being opened at the top of the movable block (6), the clamping block (10) being supported by an elastic material, and limiting plates (12) for limiting the clamping block (10) being integrally formed on both left and right sides of the top of the clamping slot (11) in a horizontal direction.

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