High-strength special bolt structure and metal cutting device thereof

Abstract

The invention discloses a high-strength special bolt structure and a metal cutting device thereof, and relates to the technical field of bolt cutting, the high-strength special bolt structure comprises a workbench, a cutting assembly and a supporting assembly.The high-strength special bolt structure and the metal cutting device thereof drive supporting sleeves to synchronously move and rotate through rotating sleeves, and inserting pipes are inserted into flow channels of the supporting sleeves on the left side and the right side correspondingly; alternate switching of the left supporting sleeve and the right supporting sleeve is achieved, dynamic supporting of the bolt workpiece in the reciprocating cutting process is achieved, the uncut area of the bolt workpiece is supported through the supporting sleeves, cutting vibration is effectively restrained, deformation and vibration caused by cutting force are offset, and bending deformation of the bolt workpiece caused by insufficient supporting in the cutting process is avoided; full-length dynamic supporting of the bolt workpiece in the cutting process is achieved, the uncut area of the bolt workpiece is supported through the supporting sleeve, cutting vibration is effectively restrained, deformation and vibration caused by cutting force are offset, and bending deformation of the bolt workpiece caused by insufficient supporting in the cutting process is avoided; and full-length dynamic supporting of the bolt workpiece in the cutting process is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of bolt cutting, and more specifically, to a high-strength special bolt structure and its metal cutting device. Background Art

[0002] As an indispensable fastener in key engineering fields such as modern machinery, construction, bridges, rail transit, and aerospace, high-strength bolts have excellent tensile strength and fatigue performance. Such bolts are widely used in working conditions that bear high loads, vibrations, and impacts. Therefore, extremely strict requirements are imposed on their mechanical properties, dimensional accuracy, and surface quality. Currently, common metal cutting equipment mainly includes ordinary lathes, CNC lathes, automatic tapping machines, etc. As a core connecting part, the quality of high-strength special bolts directly affects the stability and safety of the overall structure. With the development of industry towards high-precision and high-tech directions, more stringent requirements are put forward for the mechanical properties, dimensional accuracy, and surface quality of high-strength bolts.

[0003] Traditional bolt manufacturing processes mostly adopt the method of cold heading forming followed by turning to machine the threads. Usually, high-quality carbon steel, alloy steel, or other high-strength materials are used as raw materials. Through the process of forging wire or bar into the required shape by a die, after cold heading forming, turning is usually used. By moving and rotating the tool along the axial direction of the bolt, the required thread shape is gradually machined. Although turning can achieve high precision, the efficiency is relatively low.

[0004] In the actual use of the prior art, due to the fact that traditional cutting methods mostly adopt one-way cutting processes, it is easy to generate an asymmetric residual stress distribution on the bolt surface, thereby affecting its fatigue strength and service life. Moreover, when machining long bolts, the middle section of the bolt is in a suspended state. After being subjected to the radial and axial forces applied by the tool during the cutting process, it is extremely easy to cause bending deformation or vibration deviation, affecting the quality of the final product. Therefore, in view of the above technical problems, it is necessary to provide a high-strength special bolt structure and its metal cutting device. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-strength special bolt structure and its metal cutting device to solve the above problems.

[0006] To achieve the above purpose, the technical solutions provided by an embodiment of the present invention are as follows:

[0007] A high-strength special bolt structure and its metal cutting device, including a workbench, a bolt workpiece, a cutting assembly and a support assembly. Two support rods are symmetrically and fixedly connected to the upper surface of the workbench. The bolt workpiece is movably installed in the inner cavities of the two support rods. The bolt workpiece is made of a high-strength alloy material, and the pitch is 0.8 - 1.2 times the standard pitch, and the thread profile angle is 55° - 65°. A moving assembly is installed on the upper surface of the workbench. The cutting assembly includes a support ring sleeved on the outer surface of the bolt workpiece. A rotating sleeve is rotatably connected to the inner cavity of the support ring. A gear ring is fixedly connected to the outer surface of the rotating sleeve. A cutting groove is opened in the inner cavity of the rotating sleeve. Two hydraulic rods are symmetrically and fixedly connected to the bottom of the inner cavity of the cutting groove. A milling cutter is fixedly connected to the upper ends of the hydraulic rods. The support assembly includes a support sleeve sleeved on the outer surface of the support rod. An iron sheet is fixedly connected to one end of the support sleeve away from the bolt workpiece. An iron block is inlaid and fixed in the inner cavity of the outer surface of one end of the support sleeve away from the bolt workpiece. A flow channel is opened in the inner cavity of the support sleeve near the bolt workpiece. An insertion tube is inserted through the inner cavity of the flow channel.

[0008] As a further improvement of the present invention, four support legs are evenly and fixedly connected to the lower surface of the workbench, and the support rods are L-shaped.

[0009] As a further improvement of the present invention, a positioning groove is opened at one end of the support rod. An elastic sleeve is fixedly connected to the inner cavity of the positioning groove. The elastic sleeve is a U-shaped with a hollow interior. The inner cavity of the elastic sleeve is filled with an electrorheological fluid. An energized wire is arranged inside the elastic sleeve and is connected to an external power source.

[0010] As a further improvement of the present invention, insertion rods are symmetrically and fixedly connected to both ends of the bolt workpiece. The insertion rods are inserted through the inside of the elastic sleeve.

[0011] As a further improvement of the present invention, two columns are symmetrically and fixedly connected to the upper surface of the workbench. A fixed frame is fixedly connected to the upper ends of the columns. A screw rod is rotatably connected to the inner cavity of the fixed frame.

[0012] As a further improvement of the present invention, a driving motor is fixedly connected to one side of the fixed frame. The output shaft end of the driving motor penetrates through the fixed frame and is fixedly connected to the screw rod.

[0013] As a further improvement of the present invention, a motor is fixedly connected to the outer surface of the support ring. The output shaft end of the motor penetrates through the support ring and is fixedly connected to a gear. The gear is meshed with the gear ring. A groove is opened in the inner cavity of the support ring. The gear ring and the gear are located inside the groove. One end of the support ring moves inside the fixed frame. The outer surface of the screw rod is threadedly connected to the inner cavity of the support ring.

[0014] As a further improvement of the present invention, an electromagnet ring is fixedly connected to the outer surface of the support rod, a connecting plate is fixedly connected to the outer surface of the electromagnet ring, and an electromagnet block is embedded and fixed in the inner cavity of the lower surface of the connecting plate.

[0015] As a further improvement of the present invention, a wear-resistant layer is installed on the inner wall of the support sleeve, the upper end of the flow channel is trumpet-shaped, the lower end of the flow channel is tilted downward, and the outer surface of the insert is fixedly connected to a rubber sleeve.

[0016] As a further improvement of the present invention, two electric push rods are symmetrically fixedly connected to the outer surface of the rotating sleeve, the upper ends of the electric push rods are fixedly connected to a pump, and the output end of the pump is fixedly connected to the cannula and communicated with the cannula.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] (1) This solution uses the forward rotation of the rotating sleeve to drive the milling cutter to rotate synchronously with it to pre-cut the outer circle of the bolt workpiece, and then drives the milling cutter to move in the opposite direction along the original path for cutting. The forward and reverse bidirectional rotation cutting method is adopted to effectively offset the eccentric torque generated during unidirectional cutting, reduce residual stress, and avoid the risk of fatigue fracture of high-strength bolts due to stress concentration. The hydraulic rod adjusts the milling cutter depth in real time to ensure the uniformity and consistency of each cutting, avoid the error accumulation caused by layered cutting, and at the same time eliminate the step of returning the tool to its original position after each cutting in the traditional process, thereby improving the cutting efficiency.

[0019] (2) This solution drives the support sleeve to move and rotate synchronously by rotating the sleeve, and inserts the insert tubes into the flow channels of the support sleeves on the left and right sides respectively to achieve alternating switching of the left and right support sleeves, thereby achieving dynamic support for the bolt workpiece during the reciprocating cutting process. The support sleeve supports the uncut area of the bolt workpiece, effectively suppresses cutting vibration, offsets the deformation and vibration caused by the cutting force, avoids bending deformation of the bolt workpiece due to insufficient support during cutting, and achieves full-length dynamic support for the bolt workpiece during the cutting process.

[0020] (3) This solution starts the pump to blow external air into the flow channel through the insert tube and sprays it out through the inclined lower end. On the one hand, the milling cutter cutting area is cooled by air blowing, so that the milling cutter cutting area is cooled in real time, avoiding the softening of the surface quenching layer of high-strength steel due to cutting heat, maintaining the hardness of the bolt material, and preventing the tool from overheating and damage, thereby extending its service life. On the other hand, the high-speed airflow blows out the metal debris along the cut groove, achieving cleaning while cutting, avoiding accumulation that affects the cutting accuracy and the surface quality of the bolt workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 Schematic diagram of the overall side view structure of the present invention;

[0023] Figure 3 Schematic diagram of the semi-sectional internal structure of the present invention;

[0024] Figure 4 of the present invention Figure 3 -Enlarged schematic diagram of the structure at position A;

[0025] Figure 5 Schematic diagram of the structural disassembly of the cutting component of the present invention;

[0026] Figure 6 Schematic diagram of the sectional structure of the rotating sleeve of the present invention;

[0027] Figure 7 Schematic diagram of the electromagnet coil structure of the present invention;

[0028] Figure 8 Schematic diagram of the support sleeve structure of the present invention.

[0029] Explanation of the reference numerals in the figure:

[0030] 1, workbench; 101, support leg; 2, support rod; 201, positioning groove; 202, elastic sleeve; 203, electrorheological fluid; 3, bolt workpiece; 301, insertion rod; 4, cutting component; 401, support ring; 402, rotating sleeve; 403, groove; 404, gear ring; 405, gear; 406, motor; 407, cutting groove; 408, hydraulic rod; 409, milling cutter; 5, moving component; 501, column; 502, fixed frame; 503, driving motor; 504, screw rod; 6, support component; 601, support sleeve; 602, iron sheet; 603, electromagnet coil; 604, connecting plate; 605, electromagnet block; 606, iron block; 607, flow channel; 608, electric push rod; 609, pumping unit; 610, insertion tube. Detailed implementation manners

[0031] Next, the technical solutions of the present invention will be clearly and completely described 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 of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] Please refer to Figures 1 - 5, A high-strength special bolt structure and its metal cutting device, including a workbench 1, a cutting component 4 and a support component 6. On the upper surface of the workbench 1, two support rods 2 are symmetrically and fixedly connected. A moving component 5 is installed on the upper surface of the workbench 1. The bolt workpiece 3 is movably installed in the inner cavities of the two support rods 2. The bolt workpiece 3 is made of a high-strength alloy material, and its pitch is 0.8 - 1.2 times the standard pitch, and the thread profile angle is 55° - 65°.

[0034] Specifically, four support legs 101 are evenly and fixedly connected to the lower surface of the workbench 1. The workbench 1 serves as the basic load-bearing platform of the entire device, and four support legs 101 are evenly and fixedly connected to its bottom by welding or bolts to ensure the stability during the operation of the whole machine.

[0035] The support rod 2 is L-shaped. The support rod 2 adopts an L-shaped structure, with the vertical part firmly connected to the upper surface of the workbench 1, and the horizontal part is used to install other components, thus forming a stable "door"-type support structure.

[0036] A positioning groove 201 is opened at one end of the support rod 2. An elastic sleeve 202 is fixedly connected inside the positioning groove 201. The elastic sleeve 202 is a U-shaped hollow inside. The inner cavity of the elastic sleeve 202 is filled with an electrorheological fluid 203. An energized wire is built into the elastic sleeve 202 and the energized wire is connected to an external power supply. At both ends of the bolt workpiece 3, insertion rods 301 are symmetrically and fixedly connected. The insertion rods 301 are inserted into the positioning groove 201 of the support rod 2. The elastic sleeve 202 is wrapped around the outer surface of the insertion rod 301 in a U-shape. By supplying power to the energized wire in the elastic sleeve 202 through an external power supply, the electrorheological fluid 203 quickly solidifies under the action of an electric field, forming a rigid support structure, firmly fixing the insertion rod 301 in the positioning groove 201, and realizing the positioning of the bolt workpiece 3. This clamping method has the advantages of fast response, uniform clamping, and no damage to the surface of the bolt workpiece compared with traditional mechanical chucks.

[0037] After cutting is completed, disconnect the power supply of the energized wire in the elastic sleeve 202. The electrorheological fluid 203 returns to its liquid state, and the insertion rod 301 can be easily pulled out, and other components also return to their initial positions, waiting for the next processing cycle.

[0038] The U-shaped opening width of the elastic sleeve 202 needs to be slightly larger than the diameter of the insertion rod 301, allowing the insertion rod 301 to freely insert, but the electrorheological fluid 203 can provide a radial clamping force after solidification to prevent the displacement of the bolt workpiece. The energized wire in the elastic sleeve 202 is wrapped with a high-temperature resistant insulating material, and the power supply is through a slip ring or wireless induction method to avoid cable entanglement. The electrorheological fluid 203 is selected as a silicate-based electrorheological fluid (such as a silicone oil system), which has a high critical electric field strength and good thermal stability.

[0039] On the upper surface of the workbench 1, two columns 501 are symmetrically and fixedly connected. At the upper ends of the columns 501, a fixed frame 502 is fixedly connected. Inside the fixed frame 502, a screw rod 504 is rotatably connected. On one side of the fixed frame 502, a driving motor 503 is fixedly connected. The output shaft end of the driving motor 503 penetrates through the fixed frame 502 and is fixedly connected to the screw rod 504.

[0040] Start the driving motor 503 to drive the screw rod 504 to rotate, drive the support ring 401 to move horizontally inside the fixed frame 502, drive the rotating sleeve 402 to move at the position to be cut on the outer surface of the bolt workpiece 3. The column 501 is made of cast iron or carbon steel structure, and is firmly connected to the workbench 1 through precision machining and high-strength bolts to ensure the rigidity and seismic resistance of the overall structure. Inside the fixed frame 502, a rolling guide pair or a linear guide is provided to guide the cutting assembly 401 to move smoothly horizontally. The guide surface is processed by grinding and cooperates with the support ring 401 to move smoothly.

[0041] Embodiment 2:

[0042] Please refer to Figures 1 - 6 , a high-strength special bolt structure and its metal cutting device, further comprising a cutting assembly 4, including a support ring 401 sleeved on the outer surface of the bolt workpiece 3. Inside the support ring 401, a rotating sleeve 402 is rotatably connected. On the outer surface of the rotating sleeve 402, a gear ring 404 is fixedly connected. Inside the rotating sleeve 402, a cutting groove 407 is opened. At the bottom of the cutting groove 407, two hydraulic rods 408 are symmetrically and fixedly connected. The upper ends of the hydraulic rods 408 are fixedly connected to a milling cutter 409.

[0043] Specifically, a motor 406 is fixedly connected to the outer surface of the support ring 401. The output shaft end of the motor 406 penetrates through the support ring 401 and is fixedly connected to a gear 405. The gear 405 is meshed with a gear ring 404. A groove 403 is formed in the inner cavity of the support ring 401. The gear ring 404 and the gear 405 are located inside the groove 403. One end of the support ring 401 moves inside a fixed frame 502. The outer surface of the screw rod 504 is threadedly connected to the inner cavity of the support ring 401. In the initial state, the support ring 401 is sleeved on the outer surface of the support rod 2. The support ring 401 moves horizontally inside the fixed frame 502, driving the rotating sleeve 402 to move to the position to be cut on the outer surface of the bolt workpiece 3. During the first positive cutting from left to right, by starting the motor 406 to drive the gear 405 to drive the meshed gear ring 404 to rotate, the rotating sleeve 402 is driven to rotate forward. The milling cutter 409 in the cutting groove 407 rotates synchronously with the rotating sleeve 402. At this time, the hydraulic rod 408 is at the initial extended length. The milling cutter 409 pre-cuts the outer circle of the bolt workpiece 3 at a set shallow depth (such as 0.5 mm) to form an initial cutting path, avoiding tool overload caused by direct deep cutting. The hydraulic rod 408 adjusts the depth of the milling cutter 409 in real time to ensure the uniformity and consistency of each cutting, and avoid error accumulation caused by layered cutting.

[0044] The gear ring 404 and the gear 405 are located inside the groove 403. By rotating the gear 405 to drive the gear ring 404 to rotate, the rotating sleeve 402 is also driven to rotate. The rotating sleeve 402 rotates flexibly in cooperation with the support ring 401 and will not generate displacement.

[0045] After the first cutting is completed, at this time, the hydraulic rod 408 drives the milling cutter 409 to feed vertically, increasing the cutting depth to the set target value (such as 1 mm). At the same time, the motor 406 is started to drive the gear 405 to switch the rotation direction, so that the rotating sleeve 402 rotates in the reverse direction at the same speed. The driving motor 503 also drives the screw rod 504 to rotate in the reverse direction, driving the milling cutter 409 to move in the reverse direction along the original path for cutting. By two-way cutting, the unidirectional cutting stress is eliminated, the flatness of the cut is improved, the eccentric moment generated by traditional unidirectional cutting is eliminated, the residual stress at the cut is reduced, and the hidden danger of fatigue fracture of high-strength bolts caused by cutting stress is avoided. The two-way cutting is combined with precise depth control, which can reduce the surface roughness of the cut.

[0046] Through the design of directly reversing the cutting after positive cutting, the steps of multiple repositionings required in the traditional process are omitted, reducing non-production time such as tool retraction and repositioning, and improving the cutting efficiency. The wear-resistant coating embedded on the inner wall of the support ring 401 can improve the service life of the support ring 401 and reduce the replacement frequency of vulnerable parts. The wear-resistant coating of the support ring 401 (such as tungsten carbide coating, etc.) is usually fixed by spraying. Note that the thickness of the coating needs to be detected regularly. When the wear exceeds 0.05 mm, it needs to be re-sprayed.

[0047] Embodiment 3:

[0048] Please refer to Figures 1 - 8 , a high-strength special bolt structure and its metal cutting device, further comprising a support assembly 6, including a support sleeve 601 sleeved on the outer surface of the support rod 2, a iron sheet 602 is fixedly connected to one end of the support sleeve 601 away from the bolt workpiece 3, an iron block 606 is fixedly embedded in the inner cavity of the outer surface of the support sleeve 601 away from the bolt workpiece 3, a flow channel 607 is opened in the inner cavity of the support sleeve 601 close to the bolt workpiece 3, and an insertion tube 610 is inserted through the inner cavity of the flow channel 607.

[0049] Specifically, an electromagnet coil 603 is fixedly connected to the outer surface of the support rod 2, a connecting plate 604 is fixedly connected to the outer surface of the electromagnet coil 603, an electromagnet block 605 is fixedly embedded in the inner cavity of the lower surface of the connecting plate 604, a wear-resistant layer is installed on the inner wall of the support sleeve 601, the upper end of the flow channel 607 is in a horn shape, the lower end of the flow channel 607 is inclined downward, the support ring 401 is initially sleeved on the outer surface of the support rod 2, and the flow channel 607 at its end close to the bolt workpiece is in the shape of the upper end of a horn, which is convenient for the insertion tube 610 to be quickly aligned and inserted. The support ring 401 in the initial state is magnetically adsorbed to the electromagnet coil 603 through the iron sheet 602 and stably fits on the outside of the support rod 2 without participating in the support of the bolt workpiece 3. When starting cutting, the electric push rod 608 is started to drive the pump 609 to descend, driving the insertion tube 610 to be inserted into the flow channel 607 of the left support ring 401, realizing the positioning of the support sleeve 601 and the rotating sleeve 402.

[0050] A rubber sleeve is fixedly connected to the outer surface of the insertion tube 610, two electric push rods 608 are symmetrically fixedly connected to the outer surface of the rotating sleeve 402, the upper end of the electric push rod 608 is fixedly connected to the pump 609, the output end of the pump 609 is fixedly connected to the insertion tube 610 and communicated with it. When the left support ring 401 moves to the right (when the cutting assembly 4 completes the cutting from left to right), at this time, the corresponding electric push rod 608 is started to extend, driving the pump 609 to rise. At this time, the insertion tube 610 leaves the flow channel 607, and the support ring 401 loses its fixed limit. The electromagnet coil 603 drives the left support sleeve 601 to automatically reset by adsorbing the iron sheet 602, and drives the iron block 606 to rotate and return to the original position by starting the electromagnet block 605 to magnetically adsorb the iron block 606, facilitating the next insertion of the insertion tube 610.

[0051] Start the electric push rod 608 on the right to drive the insertion tube 610 on the right to move downward and insert into the flow channel 607 of the support sleeve 601 on the right. Through the alternating switching of the left and right support sleeves 601, the dynamic support of the bolt workpiece 3 during the reciprocating cutting process is realized. Through the support of the support ring 401 for the uncut area of the bolt workpiece 3, the cutting vibration is effectively suppressed, the deformation caused by the cutting force is offset, and the bending deformation of the bolt workpiece caused by insufficient support during cutting is avoided.

[0052] After the cannula 610 is inserted into the interior of the flow channel 607, the rubber sleeve on the outer surface ensures the sealing of the connection between the cannula 610 and the flow channel 607, preventing gas leakage. At the same time, the cannula 610 wrapped by the rubber sleeve can reduce the frictional loss with the flow channel 607 and extend the service life of the device. By starting the suction pump 609, the external air flow is blown into the flow channel 607 through the cannula 610 and ejected from the inclined lower end. On the one hand, it blows and cools the cutting area of the milling cutter, and on the other hand, the high-speed air flow blows the metal chips out along the cut groove, realizing cleaning while cutting.

[0053] Working principle: During the use of the device, first insert the insertion rods 301 at both ends of the bolt workpiece 3 into the positioning grooves 201 of the support rods 2. The elastic sleeve 202 is U-shaped and wraps around the outer surface of the insertion rod 301. Power is supplied to the energized wire inside the elastic sleeve 202 through an external power source. The electrorheological fluid 203 quickly solidifies under the action of an electric field to form a rigid support structure, firmly fixing the insertion rod 301 in the positioning groove 201 to achieve the positioning of the bolt workpiece 3. The support ring 401 in the initial state is magnetically adsorbed to the electromagnet coil 603 through the iron sheet 602 and stably fits on the outside of the support rod 2. When starting the cutting, start the electric push rod 608 to drive the suction pump 609 to descend, driving the cannula 610 to insert into the flow channel 607 of the left support ring 401 to achieve the positioning of the support sleeve 601 and the rotating sleeve 402. Then start the drive motor 503 to drive the screw 504 to rotate, driving the support ring 401 to move horizontally along the inside of the fixed frame 502, driving the rotating sleeve 402 to move at the position to be cut on the outer surface of the bolt workpiece 3. By starting the motor 406 to drive the gear 405 to drive the gear ring 404 meshed with it to rotate, driving the rotating sleeve 402 to rotate forward. The milling cutter 409 in the cutting groove 407 rotates synchronously with the rotating sleeve 402. At this time, the hydraulic rod 408 is at the initial extended length, and the milling cutter 409 pre-cuts the outer circle of the bolt workpiece 3 at a set shallow depth to form an initial cutting path. After the initial cutting is completed, at this time, drive the milling cutter 409 to vertically feed through the hydraulic rod 408 to increase the cutting depth to the set target value. At the same time, start the motor 406 to drive the gear 405 to switch the rotation direction, so that the rotating sleeve 402 rotates in the reverse direction at the same speed, and the drive motor 503 also drives the screw 504 to rotate in the reverse direction, driving the milling cutter 409 to move along the original path in the reverse direction for cutting. By two-way cutting, the unidirectional cutting stress is eliminated, the flatness of the cut is improved, the steps of multiple repositionings required in the traditional process are omitted, and the cutting efficiency is improved. The hydraulic rod 408 adjusts the depth of the milling cutter 409 in real time to ensure the uniformity and consistency of each cut, and avoid error accumulation caused by layered cutting.

[0054] When the left support ring 401 moves to the right, the corresponding electric push rod 608 is activated to extend, driving the pumping unit 609 to rise. At this time, the cannula 610 leaves the flow channel 607, and the support ring 401 loses its fixed limit. The electromagnet coil 603 adsorbs the iron sheet 602 to drive the automatic reset of the left support sleeve 601, and the electromagnet block 605 is activated to drive the rotation of the iron block 606 by magnetic adsorption to restore it to the original position, facilitating the next insertion of the cannula 610. Then, the right electric push rod 608 is activated to drive the right cannula 610 to move downward and insert into the flow channel 607 of the right support sleeve 601. By alternately switching the left and right support sleeves 601, dynamic support for the bolt workpiece 3 during the reciprocating cutting process is achieved. The support ring 401 supports the uncut area of the bolt workpiece 3, effectively suppressing cutting vibration. After the cannula 610 is inserted into the flow channel 607, the rubber sleeve on the outer surface ensures the sealing of the connection with the flow channel 607 to avoid gas leakage. At the same time, the cannula 610 wrapped by the rubber sleeve can reduce the frictional loss with the flow channel 607 and extend the service life of the device. By activating the pumping unit 609, external air flow is blown into the flow channel 607 through the cannula 610 and ejected from the inclined lower end. On the one hand, it cools the milling cutter cutting area by blowing air, and on the other hand, the high-speed air flow blows the metal chips out along the cutting groove, realizing cleaning while cutting.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive.

[0056] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation manners that can be understood by those skilled in the art.

Claims

1. A high-strength special bolt structure and its metal cutting device, characterized in that: Comprising: A workbench (1), on the upper surface of which two support rods (2) are symmetrically and fixedly connected, and a moving component (5) is installed on the upper surface of the workbench (1); A bolt workpiece (3), movably installed in the inner cavities of the two support rods (2), the bolt workpiece (3) is made of high-strength alloy material, and the pitch is 0.8 - 1.2 times the standard pitch, and the thread profile angle is 55° - 65°; A cutting component (4), including a support ring (401) sleeved on the outer surface of the bolt workpiece (3), a rotating sleeve (402) is rotatably connected in the inner cavity of the support ring (401), a gear ring (404) is fixedly connected to the outer surface of the rotating sleeve (402), a cutting groove (407) is formed in the inner cavity of the rotating sleeve (402), two hydraulic rods (408) are symmetrically and fixedly connected to the bottom of the inner cavity of the cutting groove (407), and a milling cutter (409) is fixedly connected to the upper end of the hydraulic rod (408); A support component (6), including a support sleeve (601) sleeved on the outer surface of the support rod (2), an iron sheet (602) is fixedly connected to one end of the support sleeve (601) away from the bolt workpiece (3), an iron block (606) is inlaid and fixed in the inner cavity of the outer surface of one end of the support sleeve (601) away from the bolt workpiece (3), a flow channel (607) is formed in the inner cavity of the support sleeve (601) close to the bolt workpiece (3), and an insertion tube (610) is inserted into the inner cavity of the flow channel (607).

2. The high-strength special bolt structure and its metal cutting device according to claim 1, characterized in that: Four support legs (101) are evenly and fixedly connected to the lower surface of the workbench (1), and the support rod (2) is L-shaped.

3. The high-strength special bolt structure and its metal cutting device according to claim 1, characterized in that: A positioning groove (201) is formed at one end of the support rod (2), an elastic sleeve (202) is fixedly connected in the inner cavity of the positioning groove (201), the elastic sleeve (202) is U-shaped with a hollow interior, an electrorheological fluid (203) is filled in the inner cavity of the elastic sleeve (202), and an energized wire is arranged in the elastic sleeve (202) and the energized wire is connected to an external power supply.

4. A high-strength special bolt structure and its metal cutting device according to claim 1, characterized in that: Insertion rods (301) are symmetrically and fixedly connected to both ends of the bolt workpiece (3), and the insertion rods (301) are inserted into the inside of the elastic sleeve (202).

5. A high-strength special bolt structure and its metal cutting device according to claim 1, characterized in that: Two columns (501) are symmetrically and fixedly connected to the upper surface of the workbench (1), a fixed frame (502) is fixedly connected to the upper end of the column (501), and a screw rod (504) is rotatably connected in the inner cavity of the fixed frame (502).

6. The high-strength special bolt structure and its metal cutting device according to claim 5, characterized in that: A driving motor (503) is fixedly connected to one side of the fixed frame (502), and the output shaft end of the driving motor (503) penetrates through the fixed frame (502) and is fixedly connected to the screw rod (504).

7. A high-strength special bolt structure and its metal cutting device according to claim 6, characterized in that: The outer surface of the support ring (401) is fixedly connected with a motor (406). The output shaft end of the motor (406) penetrates through the support ring (401) and is fixedly connected with a gear (405). The gear (405) is meshed with a toothed ring (404). A groove (403) is formed in the inner cavity of the support ring (401). The toothed ring (404) and the gear (405) are located inside the groove (403). One end of the support ring (401) moves inside the fixed frame (502). The outer surface of the screw rod (504) is in threaded connection with the inner cavity of the support ring (401).

8. A high-strength special bolt structure and its metal cutting device according to claim 1, characterized in that: The outer surface of the support rod (2) is fixedly connected with an electromagnet coil (603). The outer surface of the electromagnet coil (603) is fixedly connected with a connecting plate (604). An electromagnet block (605) is fixedly embedded in the inner cavity of the lower surface of the connecting plate (604).

9. The high-strength special bolt structure and its metal cutting device according to claim 1, characterized in that: The inner wall of the support sleeve (601) is provided with a wear-resistant layer. The upper end of the flow channel (607) is in a horn shape. The lower end of the flow channel (607) is arranged to incline downward. The outer surface of the insertion tube (610) is fixedly connected with a rubber sleeve.

10. A high-strength special bolt structure and its metal cutting device according to claim 1, characterized in that: Two electric push rods (608) are symmetrically and fixedly connected to the outer surface of the rotating sleeve (402). The upper ends of the electric push rods (608) are fixedly connected with a pumping device (609). The output end of the pumping device (609) is fixedly connected with and communicated with the insertion tube (610).

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