An automatic processing and connection device for straight threaded steel bar sleeves

Abstract

This invention discloses an automatic processing and connection device for straight threaded sleeves of reinforcing bars, including a rib stripping and rolling machine body, a jet cooling and chip removal component, a double-layer counter-current heat exchange component, and an induction coaxial engagement drive component. A movable frame is slidably installed on the top of the rib stripping and rolling machine body, and the rib stripping drive component is fixedly connected to the upper surface of the movable frame. A rib stripping cutter disc is installed on the output shaft of the rib stripping drive component. The jet cooling and chip removal component is installed on the side of the rib stripping and rolling machine body. The double-layer counter-current heat exchange component is installed inside the rib stripping and rolling machine body, and the induction coaxial engagement drive component is installed inside the double-layer counter-current heat exchange component. This invention constructs a low-temperature jet direct injection cooling system through the cooperation of jet pipe, high-pressure nozzle, delivery pipe, lubricating oil tank, lubricating oil pipe, and semiconductor cooling chip, avoiding the defects of spindle thermal expansion and steel material softening caused by the inability to dissipate heat in time due to continuous and severe plastic deformation.

Description

Technical Field

[0001] This invention relates to the field of automated processing technology for rebar connections, and more specifically, to an automated processing and connection device for rebar straight thread sleeves. Background Technology

[0002] The automatic processing and connection equipment for straight threaded rebar sleeves is a specialized construction equipment that integrates automated precision manufacturing and mechanical connection functions. Its core working principle is to automatically complete two key processes at the end of the rebar—rib removal and straight thread cold rolling—through a built-in rib stripping and thread rolling mechanism. This quickly produces high-quality threads that meet national standards. Subsequently, in conjunction with a special straight threaded sleeve, the two rebars are manually twisted to achieve an efficient and high-strength rigid connection. In this process, the rib stripping and thread rolling process is particularly critical. If the original longitudinal and transverse ribs on the surface of the rebar are not precisely stripped, it will directly lead to a significant decrease in the accuracy and stability of the subsequent thread rolling, which can easily cause thread defects or connection failure.

[0003] Chinese Patent Announcement No. CN118699796A discloses an automatic processing and connection device for straight threaded steel bar sleeves. This patent utilizes automated production lines to automate processes such as peeling, threading, and material feeding. The device automatically pushes the peeled steel bar sleeves towards the tap, saving on intermediate transportation and improving work efficiency. During peeling, a wedge-shaped rod restricts the position of the peeling knife, ensuring that the peeling knife can completely remove the oxidized and rusted parts from the outer wall of the steel bar sleeve, while also maintaining a consistent outer diameter of the sleeve.

[0004] In practical applications, existing technologies suffer from the inability to dissipate heat from intense plastic deformation during continuous automated processing. This leads to thermal expansion of the spindle and softening of the reinforcing steel, which can cause the thread to shrink after cooling and contraction, resulting in a decrease in the pitch diameter and coaxiality deviation. This causes a drift in accuracy, where the thread is qualified in the hot state but fails in the cold state. This not only weakens the preload retention capacity of the joint but also significantly reduces fatigue life due to internal additional stress, causing the structure to loosen or fracture under dynamic loads. Therefore, to address the above technical problems, it is necessary to provide an automatic processing and connection device for straight threaded sleeves of reinforcing steel bars. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic processing and connection device for straight threaded steel bar sleeves to solve the above-mentioned problems.

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

[0007] An automatic processing and connection device for straight threaded steel bar sleeves includes a rib stripping and thread rolling machine body, a jet cooling and chip removal assembly, a double-layer counter-current heat exchange assembly, and an induction coaxial engagement drive assembly. A movable frame is slidably mounted on the top of the rib stripping and thread rolling machine body, and the rib stripping drive assembly is fixedly connected to the upper surface of the movable frame. A rib stripping cutter disc is mounted on the output shaft of the rib stripping drive assembly. The jet cooling and chip removal assembly is mounted on the side of the rib stripping and thread rolling machine body. The double-layer counter-current heat exchange assembly is installed inside the rib stripping and thread rolling machine body, and the induction coaxial engagement drive assembly is installed inside the double-layer counter-current heat exchange assembly.

[0008] The jet cooling and chip removal assembly includes a jet support plate fixedly connected to the outer surface of the rib stripping drive assembly. A jet tube is installed inside the jet support plate, and multiple high-pressure nozzles are arranged in a ring array inside the jet tube. The double-layer countercurrent heat exchange assembly includes a chip collection and drainage trough installed inside the rib stripping and thread rolling machine body near the bottom of the rib stripping cutter disc. A spiral guide jacket is installed inside the chip collection and drainage trough, and a spiral coil is wound inside the spiral guide jacket. The induction coaxial engagement drive assembly includes a waterproof submersible hydraulic cylinder fixedly connected to the bottom wall of the inner cavity of the chip collection and drainage trough. A drive box is installed at one end of the waterproof submersible hydraulic cylinder.

[0009] As a further improvement of the present invention, the high-pressure nozzle is inclined, a delivery pipe is connected to the outer surface of the jet pipe, one end of the delivery pipe is connected to one end of the lubricating oil pipe, a lubricating oil tank is fixedly connected to the outer surface of the rib stripping and thread rolling machine body, a lubricating oil pipe is connected inside the lubricating oil tank, a semiconductor refrigeration chip is fixedly connected to the outer surface of the lubricating oil pipe, the cooling surface of the semiconductor refrigeration chip is tightly attached to the outer surface of the lubricating oil pipe, and its heating surface faces the outside. A support block is installed on the outer surface of the rib stripping and thread rolling machine body, and the side of the support block is connected to the side of the semiconductor refrigeration chip.

[0010] As a further improvement of the present invention, an electromagnetic plate is fixedly connected to the inside of the chip collection and drainage tank near the spiral guide jacket, a cooling medium inlet pipe is installed at one end of the spiral coil, one end of the cooling medium inlet pipe is connected to the outer surface of the lubricating oil pipe, and a cooling medium return pipe is fixedly connected to the other end of the spiral coil, the other end of the cooling medium return pipe is connected to the inside of the lubricating oil tank.

[0011] As a further improvement of the present invention, control valves are installed on the outer surfaces of the cooling medium inlet pipe and the cooling medium return pipe, and flow regulating valves are installed on the outer surfaces of the cooling medium inlet pipe and the cooling medium return pipe near the lower part of the control valves. A discharge pipe is provided on the bottom wall of the inner cavity of the chip collection and drainage tank, and a sealing cap is threaded onto the outer surface of the discharge pipe.

[0012] As a further improvement of the present invention, a bidirectional motor is fixedly connected to the inner cavity side wall of the drive box, and a drive rod is fixedly connected to the output shaft of the bidirectional motor through a coupling. A spiral dressing tool sleeve is installed at one end of the drive rod.

[0013] As a further improvement of the present invention, a dynamic seal is installed between the spiral dressing tool sleeve and the drive box, a displacement sensor is fixedly connected to the top wall of the inner cavity of the drive box, a waterproof sleeve is installed on the outer surface of the drive box, a spiral cutting edge is opened inside the spiral dressing tool sleeve, and multiple micropores are opened in a ring array inside the spiral dressing tool sleeve.

[0014] As a further improvement of the present invention, a movable clamping assembly is installed on the upper surface of the rib stripping and thread rolling machine body. The movable clamping assembly includes multiple slide rails fixedly installed on the upper surface of the rib stripping and thread rolling machine body. A slider is slidably connected inside the slide rails. A movable block is fixedly connected above the multiple sliders. A U-shaped plate is fixedly connected to the upper surface of the movable block.

[0015] As a further improvement of the present invention, the side of the U-shaped plate is connected to a bidirectional lead screw via a bearing seat, and the outer surface of the bidirectional lead screw is centrally symmetrically threaded with a pair of fixing plates, and the outer surfaces of the two fixing plates are fixedly connected with a plurality of protrusions.

[0016] As a further improvement of the present invention, a limiting rod is fixedly connected between the sides of the U-shaped plate, the inner wall of the fixed plate is slidably connected to the outer surface of the limiting rod, the other end of the bidirectional screw is inserted into the outer surface of the U-shaped plate and a rotating handle is installed thereon, a side plate is fixedly connected to the upper surface of the rib stripping and rolling machine body, an electric push rod is fixedly connected to the side of the side plate, and one end of the electric push rod is connected to the side of the moving block.

[0017] As a further improvement of the present invention, the rib stripping drive assembly includes a servo motor and a hollow spindle. The hollow spindle passes through the rib stripping cutter disc and extends into the interior of the thread rolling wheel assembly. A thread rolling wheel assembly is installed between the rib stripping cutter disc and the rib stripping drive assembly. The thread rolling wheel assembly includes multiple thread rolling wheels evenly distributed on the circumference. The thread rolling wheels are installed in the housing via inclined guide rails. Multiple universal casters are fixedly connected to the bottom of the rib stripping and thread rolling machine body.

[0018] Compared with the prior art, the advantages of this invention are:

[0019] (1) This scheme constructs a low-temperature jet direct injection cooling system by cooperating with jet pipe, high-pressure nozzle, delivery pipe, lubricating oil tank, lubricating oil pipe and semiconductor cooling chip. This avoids the defects of spindle thermal expansion and steel material softening caused by the inability to dissipate heat in time due to continuous and severe plastic deformation. By instantly carrying away cutting heat with fluid kinetic energy and blowing away newly generated iron chips with tangential component force, the deep cooling and self-cleaning of the cutting zone are achieved. This eliminates the shrinkage of thread pitch diameter and coaxiality deviation caused by hot state qualification and cold state failure, and ensures the long-term stability of joint size.

[0020] (2) Through the double-layer counter-current heat exchange formed by the spiral coil and the chip collection and drainage tank, the heat of the waste liquid is efficiently neutralized and the thermal balance of the machine body is controlled, avoiding thermal deformation of the machine body and wear of precision parts caused by heat accumulation. By utilizing the heat absorption of the pre-cooled oil in the spiral guide jacket, a natural water-cooled base is provided for the induction coaxial screw drive component, thereby maintaining the overall geometric accuracy of the equipment under extreme processing conditions and greatly improving the repeatability of the thread forming.

[0021] (3) Through the coordinated operation of the waterproof immersion hydraulic cylinder and the displacement sensor, micron-level dynamic coaxial alignment in the waste liquid environment is achieved, avoiding the defects of axial misalignment and poor meshing caused by environmental interference or installation error in rigid connection. By adjusting the hydraulic cylinder stroke in real time and locking the pressure, the perfect overlap between the spiral dressing tool sleeve and the steel bar axis is ensured, thereby eliminating the additional bending stress caused by misalignment from the source and significantly enhancing the fatigue resistance of the threaded joint.

[0022] (4) Through the cooperation of bidirectional motor, drive rod, spiral dressing tool sleeve and micro-hole, a dynamic supplementary lubrication film is formed to avoid local high temperature annealing and surface scratch defects caused by excessive friction coefficient during the screwing process. By centrifugal force, a small amount of coolant is accurately sprayed onto the thread meshing surface, realizing fluid lubrication isolation under extreme pressure conditions, thereby effectively preventing the deterioration of the metallographic structure of the steel bar surface and ensuring the preload retention capacity and structural integrity of the joint under dynamic load.

[0023] (5) By combining electromagnetic plate adsorption with gravity sedimentation, the high cleanliness of the circulating medium is maintained, avoiding scratches and blockages of precision parts caused by tiny ferromagnetic debris entering the circulation system. The adsorbent is automatically released and concentrated waste liquid is discharged during standby intervals, ensuring the purity and heat exchange efficiency of the coolant in the next processing cycle, thereby extending the service life of core functional components and reducing the maintenance cost of the equipment throughout its entire life cycle.

[0024] (6) By cooperating with the rotating handle, moving block, two-way screw, fixed plate, protrusion and limit rod, the non-skewed and stable clamping of steel bars of different diameters is realized, avoiding the processing reference drift defect caused by clamping vibration or uneven force, thereby ensuring the fullness of the tooth profile and the consistency of mechanical properties of the final finished thread, and significantly reducing the safety hazards of loosening or brittle fracture of the structure during service. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle

[0027] Figure 3 This is a side view of the overall structure of the present invention;

[0028] Figure 4 This is a partial structural cross-sectional view of the body of the integral rib stripping and thread rolling machine of the present invention;

[0029] Figure 5 This is a structural cross-sectional view of the main body of the rib stripping and thread rolling machine of the present invention;

[0030] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point B;

[0031] Figure 7 This is a partial structural cross-sectional view of the inductive coaxial engagement drive assembly of the present invention;

[0032] Figure 8 For the present invention Figure 7 Enlarged view of the structure at point C;

[0033] Figure 9 This is a partial structural cross-sectional view of the jet cooling and chip removal assembly of the present invention;

[0034] Figure 10 This is a partial structural cross-sectional view of the entire invention.

[0035] Explanation of the labels in the diagram:

[0036] 1. Rib stripping and thread rolling machine body; 101. Rib stripping drive assembly; 102. Rib stripping cutter disc; 103. Thread rolling wheel assembly; 104. Moving frame; 105. Universal casters;

[0037] 2. Jet cooling and chip removal assembly; 201. Jet support plate; 202. Jet pipe; 203. High-pressure nozzle; 204. Conveying pipe; 205. Lubricating oil tank; 206. Lubricating oil pipe; 207. Semiconductor cooling chip; 208. Support block;

[0038] 3. Double-layer counter-current heat exchange assembly; 301. Chip collection and drainage tank; 302. Spiral guide jacket; 303. Spiral coil; 304. Electromagnetic plate; 305. Cooling medium inlet pipe; 306. Cooling medium return pipe; 307. Control valve; 308. Flow regulating valve; 309. Discharge pipe;

[0039] 4. Inductive coaxial engagement drive assembly; 401. Waterproof submersible hydraulic cylinder; 402. Drive box; 403. Bidirectional motor; 404. Drive rod; 405. Displacement sensor; 406. Spiral dressing tool sleeve; 407. Spiral cutting edge; 408. Micro-hole;

[0040] 5. Moving clamping assembly; 501. Slide rail; 502. Slider; 503. Electric push rod; 504. Rotating handle; 505. Moving block; 506. Two-way lead screw; 507. Fixing plate; 508. Protrusion; 509. Limiting rod. Detailed Implementation

[0041] 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.

[0042] Example 1:

[0043] Please see Figure 1 - Figure 10 An automatic processing and connection device for straight threaded steel bar sleeves includes a rib stripping and thread rolling machine body 1, a movable frame 104 slidably mounted on the top of the rib stripping and thread rolling machine body 1, a rib stripping drive assembly 101 fixedly connected to the upper surface of the movable frame 104, a rib stripping cutter disc 102 mounted on the output shaft of the rib stripping drive assembly 101, and a jet cooling and chip removal assembly 2 mounted on the side of the rib stripping and thread rolling machine body 1.

[0044] The jet cooling and chip removal assembly 2 includes a jet support plate 201 fixedly connected to the outer surface of the rib stripping drive assembly 101. A jet pipe 202 is installed inside the jet support plate 201. Multiple high-pressure nozzles 203 are arranged in a ring array inside the jet pipe 202. The high-pressure nozzles 203 are inclined and arranged in a ring array around the rib stripping cutter disc 102. The angle is optimized by fluid dynamics. Around the cutting area of ​​the cutter disc, the low-temperature oil can directly impact the high-temperature area of ​​the cutter tip with a high-speed tangential flow. The high-speed kinetic energy of the fluid is used to instantly remove the cutting heat. At the same time, the tangential component force is used to quickly blow the newly generated iron chips away from the cutter disc groove, preventing secondary cutting from scratching the surface of the steel bar. The close-range direct spray design reduces liquid atomization and heat absorption, ensuring that the liquid reaching the cutter tip always maintains the maximum impact force and the lowest temperature, realizing the simultaneous completion of cold cutting and self-cleaning.

[0045] The outer surface of the jet pipe 202 is connected to the delivery pipe 204. One end of the delivery pipe 204 is connected to one end of the lubricating oil pipe 206. The outer surface of the rib stripping and thread rolling machine body 1 is fixedly connected to the lubricating oil tank 205. The inside of the lubricating oil tank 205 is filled with extreme pressure semi-synthetic cutting fluid. This fluid has excellent lubricity, extreme pressure anti-wear properties and cooling properties. The inside of the lubricating oil tank 205 is connected to the lubricating oil pipe 206. The outer surface of the lubricating oil pipe 206 is fixedly connected to the semiconductor cooling chip 207. The cooling surface of the semiconductor cooling chip 207 is closely attached to the outer surface of the lubricating oil pipe 206. The high thermal conductivity of the pipe wall is used to quickly reduce the temperature of the flowing oil in the pipe. Its heating surface faces the outside and is connected to heat dissipation fins to accelerate heat dissipation. Through the heat dissipation fins, efficient heat exchange with the outside air is carried out to ensure that the cooling end continues to maintain a low temperature working state.

[0046] A high-pressure pump is connected in series to the piping system of the lubricating oil pipe 206 through a flange interface or threaded joint. The high-pressure pump provides high-pressure power to the low-temperature cutting fluid, enabling it to accurately impact the cutting tip with a high-speed jet, achieving efficient cooling and chip removal. A support block 208 is installed on the outer surface of the rib stripping and thread rolling machine body 1. The side of the support block 208 is connected to the side of the semiconductor cooling chip 207. A temperature sensor is installed at the outlet end of the lubricating oil pipe 206 near the semiconductor cooling chip 207 to monitor the temperature of the oil flowing through this point in real time, ensuring that the oil is deeply cooled to the preset low temperature.

[0047] The body 1 of the rib stripping and thread rolling machine is equipped with a double-layer countercurrent heat exchange assembly 3. The double-layer countercurrent heat exchange assembly 3 includes a chip collection and liquid discharge trough 301 installed inside the body 1 of the rib stripping and thread rolling machine near the bottom of the rib stripping cutter disc 102. The chip collection and liquid discharge trough 301 is equipped with a spiral flow guide jacket 302. A spiral coil 303 is wound inside the spiral flow guide jacket 302. An electromagnetic plate 304 is fixedly connected inside the chip collection and liquid discharge trough 301 near the spiral flow guide jacket 302. The electromagnetic plate 304 is used to adsorb fine ferromagnetic debris mixed in the liquid.

[0048] One end of the spiral coil 303 is equipped with a cooling medium inlet pipe 305, which is connected to the outer surface of the lubricating oil pipe 206. The other end of the spiral coil 303 is fixedly connected to a cooling medium return pipe 306, which is connected to the interior of the lubricating oil tank 205. The outer surface of the chip collection and drainage trough 301 is equipped with a heat insulation layer, which effectively blocks heat transfer to the machine body and maintains a stable internal thermal environment in the chip collection and drainage trough 301. The spiral coil 303 is made of copper, which has good thermal conductivity, allowing the low-temperature lubricating oil flowing inside the spiral coil 303 to reach the machine body. The lubricating oil can quickly absorb the heat of the waste liquid outside the pipe through the pipe wall, realizing efficient countercurrent heat exchange. At the same time, the non-magnetic properties of copper significantly reduce the magnetic attraction and interference of the electromagnetic plate 304 on the spiral coil 303 when it is working, ensuring the structural independence of the heat exchange system. One end of the spiral coil 303 is connected to the low-temperature lubricating oil pipe 206 after being cooled by the semiconductor refrigeration chip 207 through the cooling medium inlet pipe 305, and the other end flows back to the lubricating oil tank 205 through the cooling medium return pipe 306. The inner space of the chip collection and drainage tank 301 is filled with a mixture of waste coolant and iron filings falling from the processing area.

[0049] Temperature sensor 2 is installed in the inner cavity of chip collection and drainage tank 301 to monitor the temperature in real time and adjust the flow rate of cold oil entering the coil. This quickly neutralizes the heat of the waste liquid and prevents heat accumulation that could lead to thermal deformation of the equipment. The oil that has absorbed heat flows back to the oil tank for regeneration through cooling medium return pipe 306. Control valves 307 are installed on the outer surfaces of both cooling medium inlet pipe 305 and cooling medium return pipe 306. Flow regulating valves 308 are installed on the outer surfaces of both cooling medium inlet pipe 305 and cooling medium return pipe 306 near the lower part of the control valves 307. The precise control of the injection volume and flushing force of the low-temperature lubricating oil is achieved through the control valves 307 and 308. A discharge pipe 309 is provided on the bottom wall of the inner cavity of chip collection and drainage tank 301. A sealing cap is threaded onto the outer surface of the discharge pipe 309. Gravity is used to ensure that the deposited iron filings and waste liquid can be completely and conveniently discharged, and the tank can be kept tightly sealed when not in operation.

[0050] The rib stripping drive assembly 101 includes a servo motor and a hollow spindle. The rib stripping and thread rolling machine body 1 is made of welded steel structure with rust and corrosion resistant treatment on the surface. It serves as the rigid foundation support platform for the entire equipment. The moving frame 104 is made of aluminum alloy or lightweight alloy steel to reduce motion inertia. The spindle is made of alloy structural steel and has undergone heat treatment. The rib stripping cutter disc 102 has hard alloy blades embedded inside for radial cutting and peeling of the ends of the reinforcing bars. The hollow spindle passes through the rib stripping cutter disc 102 and extends into the interior of the thread rolling wheel assembly 103. The thread rolling wheel assembly 103 is installed between the rib stripping cutter disc 102 and the rib stripping drive assembly 101. The thread rolling wheel assembly 103 includes multiple thread rolling wheels evenly distributed on the circumference. The thread rolling wheels are installed in the housing through inclined guide rails. Multiple universal casters 105 are fixedly connected to the bottom of the rib stripping and thread rolling machine body 1. The universal casters 105 facilitate the movement and positioning of the entire machine on the construction site.

[0051] Furthermore, the rib stripping drive assembly 101 and the thread rolling wheel assembly 103 begin to work together. Simultaneously, the semiconductor cooling chip 207 deeply cools the extreme pressure semi-synthetic cutting fluid flowing in the lubrication pipe 206. The high-pressure pump immediately starts, pressurizing the low-temperature oil and delivering it through the lubrication pipe 206 and the delivery pipe 204 to the jet pipe 202. The oil, through the hydrodynamically optimized high-pressure nozzle 203, directly impacts the high-temperature zone at the tip of the rib stripping cutter head 102 at high speed tangentially. Under these conditions, the rib stripping cutter head 102 efficiently completes the radial stripping of the rebar ends. The thread rolling wheel assembly 103 then follows, performing cold extrusion... The high-precision straight thread rolling process is completed. The high-temperature waste liquid and iron filings mixture generated during processing fall into the chip collection and drainage tank 301 below under the action of gravity. The electromagnetic plate 304 is activated to use magnetic force to adsorb the fine ferromagnetic debris suspended in the waste liquid, realizing the initial separation of solid and liquid. At the same time, the temperature sensor 2 monitors the temperature of the waste liquid in the chip collection and drainage tank 301 in real time. Some of the pre-cooled low-temperature lubricating oil enters the spiral coil 303 through the lubricating oil pipe 206 and the cooling medium inlet pipe 305. The high-temperature waste liquid outside the chip collection and drainage tank 301 can undergo efficient double-layer countercurrent heat exchange through the pipe wall, so as to quickly neutralize the large amount of heat carried by the waste liquid.

[0052] Example 2:

[0053] Please see Figure 1 - Figure 10 Based on Example 1, the double-layer countercurrent heat exchange assembly 3 is equipped with an inductive coaxial engagement drive assembly 4.

[0054] The inductive coaxial rotary drive assembly 4 includes a waterproof submersible hydraulic cylinder 401 fixedly connected to the bottom wall of the inner cavity of the chip collection and drainage tank 301. A drive box 402 is mounted at one end of the waterproof submersible hydraulic cylinder 401. A bidirectional motor 403 is fixedly connected to the inner side wall of the drive box 402. The output shaft of the bidirectional motor 403 is fixedly connected to a drive rod 404 via a coupling. A spiral dressing cutter sleeve 406 is mounted at one end of the drive rod 404. The waterproof submersible hydraulic cylinder 401 directly drives the drive box 402 and the spiral dressing cutter sleeve 406 to perform precise axial reciprocating motion, achieving automatic alignment and rotary cutting of the sleeve and the rebar. The existing mature technology of the waterproof submersible hydraulic cylinder 401 is widely used in the joint drive of underwater robot arms, the hydraulic propulsion system of deep-sea mining equipment, and large-scale tunnel boring machines. In mud-environment operations in the cutter head drive area, such as in marine engineering, submersible hydraulic cylinder technology can achieve long-term stable operation in high-pressure seawater environments hundreds of meters deep. This ensures that the hydraulic cylinder can still output high-precision thrust even when filled with corrosive seawater. The piston rod of the waterproof submersible hydraulic cylinder 401 is fitted with a telescopic protective bellows. The two ends of the telescopic protective bellows are respectively sealed and connected to the bottom of the drive box 402 and the outer surface of the waterproof submersible hydraulic cylinder 401. The bellows expands and contracts synchronously with the piston rod to form a dynamic sealed barrier. Through the telescopic protective bellows, iron filings and impurities in the waste liquid can be effectively prevented from contacting the piston rod and seals, preventing leakage caused by abrasive wear. This significantly extends the service life of the waterproof submersible hydraulic cylinder 401 under harsh working conditions and ensures micron-level alignment accuracy.

[0055] A dynamic seal is installed between the spiral dressing tool sleeve 406 and the drive box 402. The dynamic seal is a mature existing technology that has been widely used in various harsh working conditions with relative motion, such as aerospace, automobile manufacturing, and petrochemical industries. With its excellent elastic preload and fluid lubrication balance mechanism, it can reliably block the intrusion of contaminants and prevent media leakage. It is an indispensable basic general component in industrial equipment. Therefore, the dynamic seal can form a reliable liquid-solid isolation barrier at the interface between the drive rod 404 and the drive box 402. When the spiral dressing tool sleeve 406 spins the steel bar at high speed and generates violent axial and rotational combined motion, it completely prevents the waste coolant containing iron filings and corrosive chemical components in the chip collection and drainage tank 301 from entering the drive box 402, and prevents the bidirectional motor 403 from short-circuiting. The mature existing technology has been widely used in the oil seal of the input shaft of automobile gearbox, the waterproof seal of CNC machine tool spindle, and the shaft sealing system of deep-sea submersible propulsion.

[0056] A displacement sensor 405 is fixedly connected to the top wall of the inner cavity of the drive box 402. A waterproof sleeve is installed on the outer surface of the drive box 402. A spiral cutting edge 407 is opened inside the spiral dressing tool sleeve 406. Multiple micro-holes 408 are opened in a ring array inside the spiral dressing tool sleeve 406. A temperature sensor is embedded inside the spiral dressing tool sleeve 406. The engagement depth can be detected in real time through the displacement sensor 405. During operation, the displacement sensor 405 monitors the feed position of the rebar in real time to accurately control the cutting and dressing depth. Subsequently, the waterproof submersible hydraulic cylinder 4... 01. The drive box 402 is moved forward to ensure that the spiral dressing tool sleeve 406 is strictly coaxially aligned with the front end of the rebar that has been stripped and rolled. Then, the bidirectional motor 403 starts and drives the spiral dressing tool sleeve 406 to rotate at high speed. The spiral cutting edge 407 on its inner wall is used to perform micro-cutting and deburring finishing on the straight thread end of the rebar. During this process, the temperature sensor 3 monitors the core friction temperature in real time and feeds the data back to the control system, thereby realizing intelligent monitoring and adaptive adjustment of the processing thermal state, ensuring connection accuracy and equipment safety under extreme working conditions.

[0057] A movable clamping assembly 5 is installed on the upper surface of the rib stripping and thread rolling machine body 1. The movable clamping assembly 5 includes multiple slide rails 501 fixedly installed on the upper surface of the rib stripping and thread rolling machine body 1. Slider 502 is slidably connected inside the slide rails 501. A movable block 505 is fixedly connected above the multiple sliders 502. A U-shaped plate is fixedly connected to the upper surface of the movable block 505. A bidirectional lead screw 506 is connected to the side of the U-shaped plate through a bearing seat. A pair of fixed plates 507 are centrally symmetrically threaded on the outer surface of the bidirectional lead screw 506. Multiple protrusions 508 are fixedly connected to the outer surface of the two fixed plates 507. A PLC central controller is installed on the outer surface of the rib stripping and thread rolling machine body 1. In terms of power supply, the system provides independent and stable power support for key actuators such as the bidirectional motor 403, electric push rod 503 and semiconductor cooling chip 207, ensuring the normal operation and precise coordination of the whole machine in the automated operation process.

[0058] Limiting rods 509 are fixedly connected between the sides of the U-shaped plate. The inner wall of the fixed plate 507 is slidably connected to the outer surface of the limiting rods 509. The other end of the bidirectional screw 506 is inserted into the outer surface of the U-shaped plate and a rotating handle 504 is installed. A side plate is fixedly connected to the upper surface of the rib stripping and thread rolling machine body 1. An electric push rod 503 is fixedly connected to the side of the side plate. One end of the electric push rod 503 is connected to the side of the moving block 505. During operation, the rotating handle 504 can finely adjust the bidirectional screw 506, which drives the fixed plate 507 to clamp steel bars of different diameters, realizing flexible adaptive clamping. The moving clamping component 5 and the rib stripping drive component 101 work together to provide stable reaction force support during rib stripping, thread rolling and screwing. Through the precise stroke control of the electric push rod 503, it is ensured that the end of the steel bar accurately reaches each processing station, ensuring the smoothness and safety of continuous operation.

[0059] Furthermore, the waterproof submersible hydraulic cylinder 401 is activated, pushing the drive box 402 and the front-end spiral dressing tool sleeve 406 to move axially forward in the waste liquid environment, ensuring that the central axis of the spiral dressing tool sleeve 406 is coaxially aligned with the axis of the straight thread rod of the rebar at the micron level. Then, the bidirectional motor 403 is activated, driving the spiral dressing tool sleeve 406 to rotate at high speed through the drive rod 404. Under the action of strong centrifugal force, the trace amount of coolant remaining or introduced in the micro-holes 408 inside the spiral dressing tool sleeve 406 is evenly thrown out and precisely sprayed onto the contact area between the thread end to be dressed and the spiral cutting edge 407, instantly forming a dynamic cooling and lubrication film, significantly reducing the cutting temperature and friction coefficient. Subsequently, the drive electric push rod 503 pushes the moving block 505 to move forward smoothly, so that the end of the rebar slowly enters the high-speed rotating spiral dressing tool sleeve 406. The spiral cutting edge 407 on the inner wall is used to perform micro-cutting, deburring and chamfering on the thread end, completing the high-precision straight thread end finishing process.

[0060] Working principle: In use, the operator first places the straight threaded bar of the rebar to be processed between the two fixed plates 507 of the movable clamping assembly 5, and sends the front end of the rebar into the processing area of ​​the rib-stripping drive assembly 101. Then, by rotating the rotary handle 504, the operator drives the bidirectional lead screw 506 to rotate. When the bidirectional lead screw 506 rotates, the two fixed plates 507 slide towards the center synchronously along the limiting rod 509 until the inner protrusion 508 tightly bites the surface of the rebar, thereby achieving flexible adaptive clamping for rebars of different diameters. During this process, the limiting rod 509 not only provides rigid guidance for the movement of the fixed plates 507, but also effectively prevents skewing and vibration during the clamping process. After the clamping is stable, the electric push rod 503 precisely adjusts the axial position of the moving block 505 according to the preset program to ensure that the end of the rebar accurately reaches the cutting starting point of the rib-stripping cutter disc 102, laying a high-precision benchmark for subsequent fully automated processing.

[0061] The PLC central controller initiates the main machining process, and the rib-stripping drive assembly 101 and the thread rolling wheel assembly 103 begin to work together. At the same time, the semiconductor cooling chip 207 operates at full power, with its cooling surface closely attached to the outer wall of the lubricating oil pipe 206 to deeply cool the extreme pressure semi-synthetic cutting fluid flowing inside the lubricating oil pipe 206. The temperature sensor monitors the oil temperature at the oil pipe outlet in real time. Once the preset low temperature threshold is reached, the high-pressure pump connected in series in the lubricating oil pipe 206 immediately starts, pressurizing the low-temperature oil and delivering it to the jet pipe 202 through the lubricating oil pipe 206 and the delivery pipe 204. The oil is then delivered through the hydrodynamically optimized high-pressure nozzle 203 at high speed tangentially to directly impact the high-temperature zone of the rib-stripping cutter head 102. This close-range direct injection has a dual function:

[0062] Cold cutting effect: The fluid kinetic energy is used to instantly remove cutting heat, significantly reducing the temperature of the cutting zone;

[0063] Self-cleaning effect: The tangential component force is used to quickly blow the newly generated iron filings away from the cutter head groove, effectively preventing secondary cutting from damaging the surface of the steel bar.

[0064] At the same time, the atomization of the liquid flow is reduced, ensuring that the cooling efficiency and self-cleaning effect are maximized. Under this environment, the rib stripping disc 102 efficiently completes the radial stripping of the end of the steel bar, and then the thread rolling wheel assembly 103 follows up to complete the high-precision straight thread rolling forming through the cold extrusion process.

[0065] The high-temperature waste liquid and iron filings generated during processing fall into the waste liquid collection and drainage tank 301 below under gravity. The PLC central controller immediately activates the electromagnetic plate 304 to use magnetic force to attract the fine ferromagnetic debris suspended in the waste liquid, achieving preliminary solid-liquid separation and preventing small particles from entering the circulation system and wearing precision components. At the same time, temperature sensor 2 monitors the temperature of the waste liquid in the waste liquid collection and drainage tank 301 in real time and feeds back the signal to the PLC to control valve 307 and flow regulating valve 308. Part of the pre-cooled low-temperature lubricating oil enters the cooling medium inlet pipe 305 through lubricating oil pipe 206. The oil enters the spiral coil 303 wound within the spiral guide jacket 302. The low-temperature oil flowing inside the spiral coil 303 and the high-temperature waste liquid outside the chip collection and drainage tank 301 undergo efficient double-layer countercurrent heat exchange through the pipe wall, which quickly neutralizes the large amount of heat carried by the waste liquid, prevents heat accumulation from causing thermal deformation of the machine body, and creates a low-temperature environment for subsequent processes. At the same time, the oil that has absorbed heat flows back to the lubricating oil tank 205 through the cooling medium return pipe 306, and is recycled after being cooled again. This provides a natural water-cooled base for the induction coaxial engagement drive assembly 4, assisting in its heat dissipation.

[0066] After the rib stripping and thread rolling process is completed, the PLC central controller initiates the automatic rearward repositioning of the rib stripping drive assembly 101 and the thread rolling wheel assembly 103 to create working space. Then, the waterproof submersible hydraulic cylinder 401 starts, pushing the drive box 402 and the front-end spiral dressing cutter sleeve 406 axially forward in the waste liquid environment. During this upward movement, the displacement sensor 405 collects the position data of the drive box 402 at high frequency. The PLC system calculates and fine-tunes the stroke of the waterproof submersible hydraulic cylinder 401 in real time to ensure that the central axis of the spiral dressing cutter sleeve 406 is coaxially aligned with the axis of the straight threaded steel bar at the micrometer level. Once the coaxiality is detected to meet the preset tolerance range, the waterproof submersible hydraulic cylinder 401 immediately locks its position and maintains pressure, preparing for online cutting and finishing. Simultaneously, the dynamic seals construct a reliable liquid-solid isolation barrier during the combined motion, completely preventing the intrusion of waste liquid containing chips into the drive box 402, providing a solid guarantee for the long-term trouble-free operation of the bidirectional motor 403 in extremely humid environments.

[0067] After alignment, the bidirectional motor 403 is started, which drives the spiral dressing tool sleeve 406 to rotate at high speed via the drive rod 404. Under the action of strong centrifugal force, the trace amount of coolant remaining or introduced in the micro-holes 408 inside the spiral dressing tool sleeve 406 is evenly thrown out and precisely sprayed onto the end of the thread to be dressed and the contact area of ​​the spiral cutting edge 407, instantly forming a dynamic cooling and lubrication film, significantly reducing the cutting temperature and effectively preventing local high-temperature annealing and tool wear during the cutting process. Then, the electric push rod 503 is driven to push the moving block 505 (along with the clamped steel bar) forward smoothly, so that the end of the steel bar slowly enters the high-speed rotating spiral dressing tool sleeve 406. The spiral cutting edge 407 is used to perform micro-cutting, deburring and chamfering on the front end of the thread, completing the high-precision straight thread end finishing process.

[0068] When the displacement sensor 405 detects that the cutting depth has reached the set value, the PLC immediately commands the bidirectional motor 403 to stop rotating, and then starts the electric push rod 503 to drive the straight threaded bar of the rebar to retract smoothly backward, disengaging it from the spiral dressing tool sleeve 406. Subsequently, the waterproof submersible hydraulic cylinder 401 retracts to its original position, the moving clamping assembly 5 releases the rebar, and the finished product is automatically output. During standby intervals, the system can automatically open the sealing cover of the discharge pipe 309, using gravity to discharge the concentrated iron filings and waste liquid deposited at the bottom of the chip collection and drainage tank 301. The electromagnetic plate 304 is de-energized to release the adsorbed material, making it convenient for workers to clean the chip collection and drainage tank 301, ensuring cleanliness for the next processing cycle.

[0069] After the processing of two straight threaded steel bars is completed, workers can connect them together by taking out a straight threaded sleeve of the appropriate size. After the connection is completed, it is placed on a special mechanical performance testing table for final verification of torque coefficient, tensile strength and coaxiality. Only qualified products can be put into storage for use. This forms a complete closed-loop production process from automated processing, intelligent cooling, waste liquid purification to finished product assembly and quality inspection. It realizes the full factory prefabrication and quality control of straight threaded steel bar connectors, which not only eliminates the quality hazards of on-site construction from the source, but also significantly improves the structural safety and overall construction efficiency of building projects.

[0070] 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.

[0071] 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 regard 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. An automatic processing and connection device for straight threaded steel bar sleeves, characterized in that: The machine includes a rib stripping and thread rolling machine body (1), a movable frame (104) is slidably mounted on the top of the rib stripping and thread rolling machine body (1), a rib stripping drive assembly (101) is fixedly connected to the upper surface of the movable frame (104), a rib stripping cutter disc (102) is mounted on the output shaft of the rib stripping drive assembly (101), a jet cooling and chip removal assembly (2) is mounted on the side of the rib stripping and thread rolling machine body (1), a double-layer counter-current heat exchange assembly (3) is installed inside the rib stripping and thread rolling machine body (1), and an induction coaxial rotation drive assembly (4) is installed inside the double-layer counter-current heat exchange assembly (3). The jet cooling and chip removal assembly (2) includes a jet support plate (201) fixedly connected to the outer surface of the rib stripping drive assembly (101). A jet tube (202) is installed inside the jet support plate (201), and a plurality of high-pressure nozzles (203) are arranged in a ring inside the jet tube (202). The double-layer countercurrent heat exchange assembly (3) includes a chip collection and liquid discharge trough (301) installed inside the body (1) of the rib stripping and rolling machine near the rib stripping cutter disc (102). A spiral flow guide jacket (302) is installed inside the chip collection and liquid discharge trough (301), and a spiral coil (303) is wound inside the spiral flow guide jacket (302). The inductive coaxial engagement drive assembly (4) includes a waterproof submersible hydraulic cylinder (401) fixedly connected to the bottom wall of the inner cavity of the chip collection and drainage tank (301), and a drive box (402) is installed at one end of the waterproof submersible hydraulic cylinder (401).

2. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 1, characterized in that: The high-pressure nozzle (203) is inclined, and the outer surface of the jet pipe (202) is connected to the delivery pipe (204). One end of the delivery pipe (204) is connected to one end of the lubricating oil pipe (206). The outer surface of the rib stripping and rolling machine body (1) is fixedly connected to the lubricating oil tank (205). The inside of the lubricating oil tank (205) is connected to the lubricating oil pipe (206). The outer surface of the lubricating oil pipe (206) is fixedly connected to the semiconductor cooling chip (207). The cooling surface of the semiconductor cooling chip (207) is tightly attached to the outer surface of the lubricating oil pipe (206), and its heating surface faces the outside. The outer surface of the rib stripping and rolling machine body (1) is equipped with a support block (208). The side of the support block (208) is connected to the side of the semiconductor cooling chip (207).

3. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 1, characterized in that: An electromagnetic plate (304) is fixedly connected inside the chip collection and drainage tank (301) near the spiral guide jacket (302). A cooling medium inlet pipe (305) is installed at one end of the spiral coil (303). One end of the cooling medium inlet pipe (305) is connected to the outer surface of the lubricating oil pipe (206). A cooling medium return pipe (306) is fixedly connected to the other end of the spiral coil (303). The other end of the cooling medium return pipe (306) is connected to the inside of the lubricating oil tank (205).

4. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 3, characterized in that: Control valves (307) are installed on the outer surfaces of the cooling medium inlet pipe (305) and the cooling medium return pipe (306). Flow regulating valves (308) are installed on the outer surfaces of the cooling medium inlet pipe (305) and the cooling medium return pipe (306) below the control valves (307). A discharge pipe (309) is provided on the bottom wall of the inner cavity of the chip collection and drainage tank (301). A sealing cap is threaded onto the outer surface of the discharge pipe (309).

5. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 1, characterized in that: A bidirectional motor (403) is fixedly connected to the inner cavity side wall of the drive box (402). The output shaft of the bidirectional motor (403) is fixedly connected to a drive rod (404) via a coupling. A spiral dressing tool sleeve (406) is installed at one end of the drive rod (404).

6. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 5, characterized in that: A dynamic seal is installed between the spiral dressing tool sleeve (406) and the drive box (402). A displacement sensor (405) is fixedly connected to the top wall of the inner cavity of the drive box (402). A waterproof sleeve is installed on the outer surface of the drive box (402). A spiral cutting edge (407) is opened inside the spiral dressing tool sleeve (406). Multiple microholes (408) are opened in a ring array inside the spiral dressing tool sleeve (406).

7. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 1, characterized in that: The upper surface of the rib stripping and thread rolling machine body (1) is equipped with a movable clamping assembly (5). The movable clamping assembly (5) includes multiple slide rails (501) fixedly installed on the upper surface of the rib stripping and thread rolling machine body (1). Slider (502) is slidably connected inside the slide rails (501). A movable block (505) is fixedly connected above the multiple sliders (502). A U-shaped plate is fixedly connected to the upper surface of the movable block (505).

8. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 7, characterized in that: The side of the U-shaped plate is connected to a two-way lead screw (506) via a bearing seat. The outer surface of the two-way lead screw (506) is centrally symmetrically threaded with a pair of fixing plates (507). The outer surfaces of the two fixing plates (507) are fixedly connected with multiple protrusions (508).

9. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 8, characterized in that: A limiting rod (509) is fixedly connected between the sides of the U-shaped plate. The inner wall of the fixed plate (507) is slidably connected to the outer surface of the limiting rod (509). The other end of the bidirectional screw (506) is inserted into the outer surface of the U-shaped plate and a rotating handle (504) is installed. A side plate is fixedly connected to the upper surface of the rib stripping and rolling machine body (1). An electric push rod (503) is fixedly connected to the side of the side plate. One end of the electric push rod (503) is connected to the side of the moving block (505).

10. The automatic processing and connection equipment for straight threaded steel bar sleeves according to claim 1, characterized in that: The rib stripping drive assembly (101) includes a servo motor and a hollow spindle. The hollow spindle passes through the rib stripping cutter disc (102) and extends into the interior of the thread rolling wheel assembly (103). The thread rolling wheel assembly (103) is installed between the rib stripping cutter disc (102) and the rib stripping drive assembly (101). The thread rolling wheel assembly (103) includes multiple thread rolling wheels evenly distributed on the circumference. The thread rolling wheels are installed in the housing through inclined guide rails. Multiple universal casters (105) are fixedly connected to the bottom of the rib stripping and thread rolling machine body (1).

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