High-strength special bolt structure and metal cutting device thereof

Abstract

The application discloses a high-strength special bolt structure and a metal cutting device thereof, and relates to the technical field of bolt cutting, which comprises a workbench, a cutting assembly and a supporting assembly. The supporting sleeve is driven to move and rotate synchronously by rotating the sleeve, and the insertion pipes are respectively inserted into the flow channels of the left and right supporting sleeves to realize the alternate switching of the left and right supporting sleeves, the dynamic support of the bolt workpiece in the reciprocating cutting process, the support of the bolt workpiece in the uncut area by the supporting sleeve, the effective inhibition of cutting vibration, the offset of the deformation and vibration caused by the cutting force, the avoidance of the bending deformation of the bolt workpiece caused by insufficient support during cutting, the full-length dynamic support of the bolt workpiece during cutting, the support of the bolt workpiece in the uncut area by the supporting sleeve, the effective inhibition of cutting vibration, the offset of the deformation and vibration caused by the cutting force, the avoidance of the bending deformation of the bolt workpiece caused by insufficient support during cutting, and the full-length dynamic support of the bolt workpiece during cutting.

Description

Technical Field

[0001] This invention relates to the field of bolt cutting technology, and more specifically, to a high-strength special bolt structure and its metal cutting device. Background Technology

[0002] High-strength bolts are indispensable fasteners in key engineering fields such as modern machinery, construction, bridges, rail transportation, and aerospace. They possess excellent tensile strength and fatigue performance. These bolts are widely used in working conditions that bear high loads, vibrations, and impacts. Therefore, extremely stringent requirements are placed on their mechanical properties, dimensional accuracy, and surface quality. Currently, common metal cutting equipment mainly includes conventional lathes, CNC lathes, and automatic tapping machines. As a core connecting component, 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 sophistication, even more stringent requirements are placed on the mechanical properties, dimensional accuracy, and surface quality of high-strength bolts.

[0003] Traditional bolt manufacturing processes often involve cold heading followed by turning to machine the threads. High-quality carbon steel, alloy steel, or other high-strength materials are typically used as raw materials. The process involves forging wire or bar stock into the desired shape using a die. After cold heading, turning is usually employed, where a cutting tool moves and rotates along the bolt axis to gradually cut out the required thread shape. Although turning can achieve high precision, its efficiency is relatively low.

[0004] In practical applications, existing technologies often employ unidirectional cutting processes, which can easily lead to asymmetrical residual stress distribution on the bolt surface, affecting its fatigue strength and service life. Furthermore, when machining long bolts, the middle section of the bolt is suspended in the air. During the cutting process, it is subjected to radial and axial forces applied by the cutting tool, which can easily cause bending deformation or vibration displacement, affecting the quality of the final product. Therefore, to address 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 this invention is to provide a high-strength special bolt structure and its metal cutting device to solve the above-mentioned problems.

[0006] To achieve the above objectives, an embodiment of the present invention provides the following technical solution:

[0007] A high-strength special bolt structure and its metal cutting device include a worktable, a bolt workpiece, a cutting assembly, and a support assembly. Two support rods are symmetrically fixedly connected to the upper surface of the worktable. The bolt workpiece is movably installed within the inner cavities of the two support rods. The bolt workpiece is made of high-strength alloy material, with a pitch 0.8-1.2 times the standard pitch and a thread angle of 55°-65°. A moving assembly is installed on the upper surface of the worktable. 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 formed in the inner cavity of the rotating sleeve. Two hydraulic rods are symmetrically fixedly connected to the bottom of the inner cavity of the cutting groove. A milling cutter is fixedly connected to the upper end of each hydraulic rod. The support assembly includes a support sleeve sleeved on the outer surface of the support rods. An iron sheet is fixedly connected to the end of the support sleeve away from the bolt workpiece. An iron block is embedded in the inner cavity of the outer surface of the support sleeve away from the bolt workpiece. A flow channel is formed in the inner cavity of the support sleeve near the bolt workpiece, and a tube is inserted into the inner cavity of the flow channel.

[0008] As a further improvement of the present invention, four support legs are uniformly 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 provided at one end of the support rod, and an elastic sleeve is fixedly connected to the inner cavity of the positioning groove. The elastic sleeve is a hollow U-shaped sleeve, and the inner cavity of the elastic sleeve is filled with electrorheological fluid. The elastic sleeve has a built-in current-carrying wire, and the current-carrying wire is connected to an external power source.

[0010] As a further improvement of the present invention, the bolt workpiece is symmetrically fixedly connected to both ends with insert rods, which are inserted into the elastic sleeve.

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

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

[0013] As a further improvement of the present invention, a motor is fixedly connected to the outer surface of the support ring, and a gear is fixedly connected through the output shaft of the motor through the support ring. The gear meshes with the gear ring. A groove is opened in the inner cavity of the support ring, and the gear ring and the gear are located inside the groove. One end of the support ring moves inside the fixed frame, and the outer surface of the screw 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, the inner wall of the support sleeve is provided with a wear-resistant layer, the upper end of the flow channel is funnel-shaped, the lower end of the flow channel is inclined downward, and a rubber sleeve is fixedly connected to the outer surface of the insertion tube.

[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, and a pump is fixedly connected to the upper end of the electric push rod. The output end of the pump is fixedly connected to and communicates with the insertion tube.

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

[0018] (1) This solution uses the rotating sleeve to rotate in the forward direction, which drives the milling cutter to rotate synchronously with it to pre-cut the outer circle of the bolt workpiece. Then, the milling cutter is driven to move in the reverse direction along the original path to cut. The forward and reverse rotation cutting method effectively counteracts the eccentric torque generated during unidirectional cutting, reduces residual stress, and avoids 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 cut, avoids the accumulation of errors caused by layered cutting, and eliminates the step of returning the tool to its position after each cut in the traditional process, thus improving cutting efficiency.

[0019] (2) This solution uses a rotating sleeve to drive the support sleeve to move and rotate synchronously, and inserts the tubes into the flow channels of the left and right support sleeves respectively to achieve the alternating switching of the left and right support sleeves, thereby achieving dynamic support for the bolt workpiece during the reciprocating cutting process. By supporting the uncut area of ​​the bolt workpiece with the support sleeve, the cutting vibration is effectively suppressed, the deformation and vibration caused by the cutting force are offset, and the bending deformation of the bolt workpiece caused by insufficient support during cutting is avoided, thereby achieving dynamic support for the entire length of the bolt workpiece during the cutting process.

[0020] (3) This solution uses a pump to blow external airflow into the flow channel through a tube and spray it out through the tilted lower end. On the one hand, it blows air to cool the cutting area of ​​the milling cutter, thereby achieving real-time cooling of the cutting area of ​​the milling cutter. This prevents the surface hardening layer of high-strength steel from softening due to cutting heat, maintains the hardness of the bolt material, and prevents the tool from overheating and being damaged, thus extending its service life. On the other hand, the high-speed airflow blows metal chips out along the groove of the cut, achieving simultaneous cutting and cleaning, and avoiding accumulation that affects the cutting accuracy and the surface quality of the bolt workpiece. Attached Figure Description

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

[0022] Figure 2 This is a side view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the present invention in half section;

[0024] Figure 4 For the present invention Figure 3 - Enlarged structural diagram at point A;

[0025] Figure 5 This is a schematic diagram showing the disassembled structure of the cutting component of the present invention;

[0026] Figure 6 This is a schematic cross-sectional view of the rotating sleeve structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the electromagnet coil structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the support sleeve structure of the present invention.

[0029] Explanation of the labels in the diagram:

[0030] 1. Workbench; 101. Support leg; 2. Support rod; 201. Positioning groove; 202. Elastic sleeve; 203. Electrorheological fluid; 3. Bolt workpiece; 301. Insert rod; 4. Cutting assembly; 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 assembly; 501. Column; 502. Fixed frame; 503. Drive motor; 504. Screw; 6. Support assembly; 601. Support sleeve; 602. Iron sheet; 603. Electromagnet ring; 604. Connecting plate; 605. Electromagnet block; 606. Iron block; 607. Flow channel; 608. Electric push rod; 609. Pump; 610. Insert tube. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1:

[0033] Please see Figures 1-5A high-strength special bolt structure and its metal cutting device are disclosed, comprising a worktable 1, a cutting component 4 and a support component 6. Two support rods 2 are symmetrically fixedly connected to the upper surface of the worktable 1. A moving component 5 is installed on the upper surface of the worktable 1. The bolt workpiece 3 is movably installed in the inner cavity 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 that of the standard pitch, and the thread profile angle is 55°-65°.

[0034] Specifically, four support legs 101 are evenly 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 its bottom is evenly fixedly connected to four support legs 101 by welding or bolts to ensure the stability of the whole machine during operation.

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

[0036] One end of the support rod 2 has a positioning groove 201. An elastic sleeve 202 is fixedly connected to the inner cavity of the positioning groove 201. The elastic sleeve 202 is a hollow U-shape and is filled with electrorheological fluid 203. The elastic sleeve 202 has a built-in current-carrying wire that is connected to an external power source. The bolt workpiece 3 has symmetrically fixed insertion rods 301 at both ends. The insertion rods 301 are inserted into the elastic sleeve 202. When the insertion rods 301 at both ends of the bolt workpiece 3 are inserted into the positioning groove 201 of the support rod 2, the elastic sleeve 202 wraps around the outer surface of the insertion rods 301 in a U-shape. When the current-carrying wire inside the elastic sleeve 202 is powered by an external power source, the electrorheological fluid 203 quickly solidifies under the action of the electric field, forming a rigid support structure that firmly fixes the insertion rods 301 in the positioning groove 201, thus achieving the positioning of the bolt workpiece 3. Compared with traditional mechanical chucks, this clamping method has the advantages of fast response, uniform clamping, and no damage to the surface of the bolt workpiece.

[0037] After cutting, the power supply to the energized wires inside the elastic sleeve 202 is disconnected, the electrorheological fluid 203 returns to a liquid state, the insertion rod 301 can be easily pulled out, and other components return to their initial positions, waiting for the next processing cycle.

[0038] The width of the U-shaped opening of the elastic sleeve 202 needs to be slightly larger than the diameter of the insertion rod 301 to allow the insertion rod 301 to be inserted freely. However, after the electrorheological fluid 203 is cured, it can provide radial clamping force to prevent the bolt workpiece from shifting. The current-carrying wire inside the elastic sleeve 202 is wrapped with high-temperature resistant insulating material. The power supply is provided through slip rings or wireless induction to avoid cable tangling. The electrorheological fluid 203 is selected from silicate-based electrorheological fluids (such as silicone oil systems), which have high critical electric field strength and good thermal stability.

[0039] Two columns 501 are symmetrically 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. A screw 504 is rotatably connected to the inner cavity of the fixed frame 502. A drive motor 503 is fixedly connected to one side of the fixed frame 502. The output shaft of the drive motor 503 passes through the fixed frame 502 and is fixedly connected to the screw 504.

[0040] The drive motor 503 is started to drive the screw 504 to rotate, which drives the support ring 401 to move horizontally along the inside of the fixed frame 502, and drives 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 worktable 1 through precision machining and high-strength bolts to ensure the rigidity and shock resistance of the overall structure. The fixed frame 502 is equipped with a rolling guide pair or linear guide to guide the cutting component 401 to move smoothly laterally. The guide surface is ground and cooperates with the support ring 401 to move smoothly.

[0041] Example 2:

[0042] Please see Figures 1-6 A high-strength special bolt structure and its metal cutting device are disclosed, which also include a cutting component 4, including a support ring 401 sleeved on the outer surface of the bolt workpiece 3, a rotating sleeve 402 rotatably connected to the inner cavity of the support ring 401, a toothed ring 404 fixedly connected to the outer surface of the rotating sleeve 402, a cutting groove 407 opened in the inner cavity of the rotating sleeve 402, two hydraulic rods 408 symmetrically fixedly connected to the bottom of the inner cavity of the cutting groove 407, and a milling cutter 409 fixedly connected to the upper end of the hydraulic rods 408.

[0043] Specifically, a motor 406 is fixedly connected to the outer surface of the support ring 401. A gear 405 is fixedly connected to the output shaft of the motor 406 through the support ring 401. The gear 405 meshes with a gear ring 404. A groove 403 is formed in the inner cavity of the support ring 401, and the gear ring 404 and 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 504 is threadedly connected to the inner cavity of the support ring 401. In its initial state, the support ring 401 is sleeved on the outer surface of the support rod 2. The support ring 401 moves horizontally along the inside of the fixed frame 502, driving the rotating sleeve 402 to rotate within the bolt. The outer surface of part 3 is moved to the position to be cut. During the initial forward cut, from left to right, the starting motor 406 drives the gear 405 to drive the gear ring 404 that meshes with it to rotate, which drives 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 extension length. The milling cutter 409 pre-cuts the outer circle of the bolt workpiece 3 at a set shallow depth (such as 0.5mm) to form the 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 cut and avoid the accumulation of errors caused by layered cutting.

[0044] The gear ring 404 and the gear 405 are located inside the groove 403. The gear ring 404 is driven to rotate by the rotation of the gear 405, which in turn drives the rotating sleeve 402 to rotate as well. The rotating sleeve 402 rotates flexibly with the cooperation of the support ring 401 without displacement.

[0045] After the initial cut is completed, the hydraulic rod 408 drives the milling cutter 409 to feed vertically, increasing the cutting depth to the set target value (e.g., 1mm). At the same time, the motor 406 starts and drives the gear 405 to switch the direction of rotation, causing the rotating sleeve 402 to rotate in the opposite direction at the same speed. The drive motor 503 also drives the screw 504 to rotate in the opposite direction, causing the milling cutter 409 to move in the opposite direction along the original path to cut. The bidirectional cutting eliminates the unidirectional cutting stress, improves the flatness of the cut, eliminates the eccentric torque generated by traditional unidirectional cutting, reduces the residual stress at the cut, and avoids the risk of fatigue fracture of high-strength bolts due to cutting stress. The bidirectional cutting combined with precise depth control can reduce the surface roughness of the cut.

[0046] By using a design that directly reverses after forward cutting, the process eliminates the need for multiple repositioning steps in traditional processes, reducing non-productive time such as tool retraction and repositioning, and improving cutting efficiency. The wear-resistant coating embedded in the inner wall of the support ring 401 can extend the service life of the support ring 401 and reduce the frequency of replacement of vulnerable parts. The wear-resistant coating of the support ring 401 (such as tungsten carbide coating) is usually applied and fixed by spraying. Note that the coating thickness needs to be checked regularly, and it needs to be re-sprayed when the wear exceeds 0.05mm.

[0047] Example 3:

[0048] Please see Figures 1-8 A high-strength special bolt structure and its metal cutting device are disclosed, which also include 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 the end of the support sleeve 601 away from the bolt workpiece 3. An iron block 606 is embedded and fixed in the inner cavity of the outer surface of the end of the support sleeve 601 away from the bolt workpiece 3. A flow channel 607 is opened in the inner cavity of the end of the support sleeve 601 close to the bolt workpiece 3. An insertion tube 610 is inserted into the inner cavity of the flow channel 607.

[0049] Specifically, an electromagnet ring 603 is fixedly connected to the outer surface of the support rod 2, and a connecting plate 604 is fixedly connected to the outer surface of the electromagnet ring 603. An electromagnet block 605 is embedded and fixed 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 trumpet-shaped, and the lower end of the flow channel 607 is inclined downward. In the initial state, the support ring 401 is sleeved on the outer surface of the support rod 2. The flow channel 607 near the bolt workpiece end is trumpet-shaped at the upper end, which facilitates the quick alignment and insertion of the insertion tube 610. In the initial state, the support ring 401 is magnetically attracted to the electromagnet ring 603 by the iron sheet 602 and stably attached to the outside of the support rod 2. It does not participate in the support of the bolt workpiece 3. When cutting begins, the electric push rod 608 is activated to drive the pump 609 to descend, which drives the insertion tube 610 to be inserted into the flow channel 607 of the left support ring 401, thereby 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. A pump 609 is fixedly connected to the upper end of the electric push rod 608. The output end of the pump 609 is fixedly connected to and communicates with the insertion tube 610. When the left support ring 401 moves to the right (the cutting component 4 completes the cutting from left to right), the corresponding electric push rod 608 is activated 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. Through the electromagnet ring 603, the iron plate 602 is attracted, driving the left support sleeve 601 to automatically reset. Then, by activating the electromagnet block 605, the iron block 606 is attracted by magnetic force and rotated back to its original position, which facilitates the next insertion of the insertion tube 610.

[0051] The electric push rod 608 on the right side is activated, which drives the insertion tube 610 on the right side to move downward and insert into the flow channel 607 of the support sleeve 601 on the right side. Through the alternating switching of the left and right support sleeves 601, dynamic support is achieved for the bolt workpiece 3 during the reciprocating cutting process. The support ring 401 supports the uncut area of ​​the bolt workpiece 3, effectively suppressing cutting vibration, offsetting the deformation caused by cutting force, and avoiding bending deformation of the bolt workpiece due to insufficient support during cutting.

[0052] After the insertion tube 610 is inserted into the flow channel 607, the rubber sleeve on the outer surface ensures the sealing of the connection between the insertion tube 610 and the flow channel 607 to prevent gas leakage. At the same time, the rubber sleeve can reduce frictional wear between the insertion tube 610 and the flow channel 607 and extend the service life of the device. By starting the pump 609, external airflow is blown into the flow channel 607 through the insertion tube 610 and sprayed out through the inclined lower end. On the one hand, the cutting area of ​​the milling cutter is cooled by blowing air, and on the other hand, the high-speed airflow blows metal chips out along the cutting groove, realizing cutting and cleaning at the same time.

[0053] Working principle: During the use of the device, the inserts 301 at both ends of the bolt workpiece 3 are first inserted into the positioning grooves 201 of the support rod 2. The elastic sleeve 202 wraps around the outer surface of the insert 301 in a U-shape. Power is supplied to the current-carrying wire inside the elastic sleeve 202 through an external power source. The electrorheological fluid 203 solidifies rapidly under the action of the electric field, forming a rigid support structure that firmly fixes the insert 301 in the positioning groove 201, thereby achieving the positioning of the bolt workpiece 3. The support ring 401 in the initial state is connected to the electromagnetic plate through the iron sheet 602. The iron ring 603 is magnetically adsorbed and stably attached to the outside of the support rod 2. When cutting begins, the electric push rod 608 is activated, driving the pump 609 to descend and inserting the insertion tube 610 into the flow channel 607 of the left support ring 401, thus positioning the support sleeve 601 and the rotating sleeve 402. Then, the drive motor 503 is activated, driving the screw 504 to rotate, which drives the support ring 401 to move horizontally along the inside of the fixed frame 502, causing the rotating sleeve 402 to move at the cutting position on the outer surface of the bolt workpiece 3. The motor 4 is activated. The drive gear 405 drives the meshing gear ring 404 to rotate, causing the rotating sleeve 402 to rotate in the forward direction. 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 its initial extension length. 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, the hydraulic rod 408 drives the milling cutter 409 to feed vertically, increasing the cutting depth to the set target value. At the same time, the motor 406 starts and drives the drive gear 405 to switch the direction of rotation, so that the rotating sleeve 402 rotates in the opposite direction at the same speed. The drive motor 503 also drives the screw 504 to rotate in the opposite direction, causing the milling cutter 409 to move in the opposite direction along the original path to cut. The bidirectional cutting eliminates the unidirectional cutting stress, improves the flatness of the cut, eliminates the need for multiple return steps in the traditional process, and improves the cutting efficiency. 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 the accumulation of errors caused by layered cutting.

[0054] When the left support ring 401 moves to the right, the corresponding electric push rod 608 extends, 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. Through the electromagnet ring 603 and the adsorption iron plate 602, the left support sleeve 601 is automatically reset. Then, the electromagnet block 605 is activated to magnetically adsorb the iron block 606, causing it to rotate and return to its original position, facilitating the next insertion of the insertion tube 610. Next, the electric push rod 608 on the right is activated, causing the right insertion tube 610 to move downward and insert into the flow channel 607 of the right support sleeve 601. Through the alternating switching of the left and right support sleeves 601, reciprocating cutting is achieved. During the process, the bolt workpiece 3 is dynamically supported by the support ring 401 for the uncut area of ​​the bolt workpiece 3, which effectively suppresses cutting vibration. After the insertion tube 610 is inserted into the flow channel 607, the rubber sleeve on the outer surface ensures the sealing of the connection between the insertion tube 610 and the flow channel 607 to avoid gas leakage. At the same time, the rubber sleeve can reduce the friction loss between the insertion tube 610 and the flow channel 607 and extend the service life of the device. By starting the pump 609, the external airflow is blown into the flow channel 607 through the insertion tube 610 and sprayed out through the inclined lower end. On the one hand, the cutting area of ​​the milling cutter is cooled by blowing air, and on the other hand, the high-speed airflow blows the metal chips out along the cutting groove, realizing cutting and cleaning at the same time.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods 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: include: A workbench (1) has two support rods (2) symmetrically fixedly connected to its upper surface. A moving component (5) is installed on the upper surface of the workbench (1). Two columns (501) are symmetrically 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). A screw (504) is rotatably connected to the inner cavity of the fixed frame (502). A drive motor (503) is fixedly connected to one side of the fixed frame (502). The output shaft of the drive motor (503) passes through the fixed frame (502) and is fixedly connected to the screw (504). The bolt workpiece (3) is movably installed in the inner cavity of 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 angle is 55°-65°. One end of the support rod (2) is provided with a positioning groove (201). An elastic sleeve (202) is fixedly connected to the inner cavity of the positioning groove (201). The elastic sleeve (202) is a U-shaped hollow part. The inner cavity of the elastic sleeve (202) is filled with electrorheological fluid (203). The elastic sleeve (202) has a built-in current-carrying wire and the current-carrying wire is connected to an external power source. The bolt workpiece (3) is symmetrically fixedly connected with insert rods (301) at both ends. The insert rods (301) are inserted into the elastic sleeve (202). The cutting assembly (4) includes a support ring (401) sleeved on the outer surface of the bolt workpiece (3). A rotating sleeve (402) is rotatably connected to 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 opened in the inner cavity of the rotating sleeve (402). Two hydraulic rods (408) are symmetrically fixedly connected to the bottom of the inner cavity of the cutting groove (407). A milling cutter (409) is fixedly connected to the upper end of the hydraulic rods (408). The outer surface of the support ring (401) is... A motor (406) is fixedly connected to the surface. The output shaft of the motor (406) passes through the support ring (401) and is fixedly connected to a gear (405). The gear (405) meshes with a gear ring (404). The inner cavity of the support ring (401) has a groove (403). The gear 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 (504) is threadedly connected to the inner cavity of the support ring (401). The support assembly (6) includes a support sleeve (601) fitted onto the outer surface of the support rod (2). An iron sheet (602) is fixedly connected to the end of the support sleeve (601) away from the bolt workpiece (3). An iron block (606) is embedded and fixed 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) near the bolt workpiece (3). An insert tube (610) is inserted into the inner cavity of the flow channel (607). An electromagnet ring (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 ring (603). An electromagnet block (605) is embedded and fixed in the inner cavity of the lower surface of the connecting plate (604).

2. The high-strength special bolt structure and its metal cutting device according to claim 1, characterized in that: The workbench (1) has four support legs (101) evenly fixedly connected to its lower surface, 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: The inner wall of the support sleeve (601) is equipped with a wear-resistant layer, the upper end of the flow channel (607) is flared, the lower end of the flow channel (607) is inclined downward, and a rubber sleeve is fixedly connected to the outer surface of the insertion tube (610).

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

Images