A diameter-adjustable reinforcing steel bar stripping and threading machine

Abstract

The present application relates to the technical field of reinforcing steel bar threading, and discloses a reinforcing steel bar peeling and threading machine with adjustable diameter, which comprises a base, one end of the base is provided with a clamping feeding mechanism for clamping reinforcing steel bars, the side of the base away from the clamping feeding mechanism is provided with a supporting seat, the supporting seat is rotationally connected with a rotating sleeve, and the reinforcing steel bar peeling and threading machine further comprises a rib peeling mechanism and a thread rolling mechanism; the thread rolling mechanism is arranged at one end of the rotating sleeve away from the clamping feeding mechanism, comprises a plurality of fixed plates which are circumferentially distributed on the inner wall of the rotating sleeve, the middle part of each fixed plate is rotationally connected with a first rotating shaft, the middle part of the first rotating shaft is rotationally connected with the end of an L-shaped swing arm, the bent part of the L-shaped swing arm is rotationally connected with a second rotating shaft, and the end of the second rotating shaft is provided with a thread rolling wheel. The present application keeps the revolution and rotation of the thread rolling wheel at a constant speed ratio, fundamentally overcomes the defect that the thread rolling wheel is prone to slipping in the prior art, and significantly improves the processing precision of screw threads.

Description

Technical Field

[0001] This invention relates to the field of rebar threading technology, specifically a rebar stripping and threading machine with adjustable diameter. Background Technology

[0002] The rebar stripping and threading machine (also known as the rebar straight thread stripping and rolling machine) is a core specialized piece of equipment for achieving mechanical connections of rebars. Currently, the commonly used technical solution in this field is as follows: after clamping and fixing the end of the rebar, the longitudinal and transverse ribs and oxide scale on the surface of the rebar are removed by a stripping mechanism, and then a thread rolling wheel mechanism is used to process the threads on the end of the rebar. Specifically, under the action of the drive device, the thread rolling wheel mechanism revolves along the outer circumference of the rebar. At the same time, the thread rolling wheel itself rotates adaptively under the influence of friction, thereby cold rolling a continuous helical thread on the end of the rebar, completing the stripping and threading processes in one operation.

[0003] However, during the processing, the thread rolling wheel mainly relies on the frictional force between itself and the rebar to achieve rotation. When the rebar itself has dimensional tolerance fluctuations, residual oxide scale on its surface, or tiny burrs generated after rib stripping, the frictional force between the thread rolling wheel and the rebar contact surface will momentarily decrease, leading to relative slippage of the thread rolling wheel. This slippage prevents the thread rolling wheel from maintaining a constant rotational speed synchronized with the rebar, disrupting the continuity and stability of thread forming. Ultimately, this results in lower thread accuracy, with quality problems such as incomplete thread profile, uneven pitch, or even cross-threading, seriously affecting the connection reliability of the rebar straight thread joint. Therefore, there is an urgent need for a diameter adjustable rebar stripping and threading machine that can effectively prevent thread rolling wheel slippage and ensure thread processing accuracy. Summary of the Invention

[0004] This invention provides a rebar stripping and threading machine with adjustable diameter, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A rebar stripping and threading machine with adjustable diameter includes a base, a clamping and feeding mechanism for clamping rebar is provided at one end of the base, a support seat is provided on the side of the base away from the clamping and feeding mechanism, a rotating sleeve is rotatably connected to the support seat, and a rib stripping mechanism and a thread rolling mechanism are also included.

[0007] The rib-stripping mechanism is located at one end of the rotating sleeve near the clamping and feeding mechanism and is used to cut the outer wall of the reinforcing bar.

[0008] The thread rolling mechanism is located at the end of the rotating sleeve away from the clamping and feeding mechanism. It includes multiple fixed plates circumferentially distributed on the inner wall of the rotating sleeve. A first rotating shaft is rotatably connected to the middle of the fixed plates. The end of an L-shaped swing arm is rotatably connected to the middle of the first rotating shaft. The bent portion of the L-shaped swing arm faces the center of the rotating sleeve. A second rotating shaft is rotatably connected to the bent portion of the L-shaped swing arm. The second rotating shaft rotates synchronously in the opposite direction to the first rotating shaft. A thread rolling wheel is provided at the end of the second rotating shaft. A gap adjustment component is provided on the outer wall of the rotating sleeve for adjusting the maximum gap between the thread rolling wheel and the center of the rotating sleeve. A tail support is provided at the end of the base away from the clamping and feeding mechanism. A fixed gear ring coaxial with the rotating sleeve is provided on the tail support. A driven gear that meshes with the fixed gear ring is fixedly connected to the end of the first rotating shaft.

[0009] As a preferred embodiment of the present invention, a first gear is provided at the end of the first rotating shaft away from the driven gear, and a second gear that meshes with the first gear is provided at the end of the second rotating shaft away from the thread rolling wheel. A rotational drive device for driving the rotating sleeve to rotate is provided in the middle of the support base, and the rotational speed of the thread rolling wheel is greater than the rotational speed of the rotating sleeve.

[0010] As a preferred embodiment of the present invention, the outer wall of a fixing ring is fixedly connected to one end of the plurality of fixing plates near the center of the rotating sleeve. The fixing ring is concentrically arranged with the rotating sleeve, and the fixing plates are detachably connected to the inner wall of the rotating sleeve.

[0011] As a preferred embodiment of the present invention, the spacing adjustment assembly includes a first clearance groove disposed on the outer wall of the rotating sleeve. A drive ring coaxially disposed with the rotating sleeve is rotatably connected to the outer side of the rotating sleeve. A triangular apex is disposed on the side of the drive ring near the center of the rotating sleeve. The end of the triangular apex passes through the first clearance groove and extends into the inner wall of the rotating sleeve. A deflection drive device is disposed on the outer wall of the rotating sleeve to drive the drive ring to rotate along the outer wall of the rotating sleeve. When the rotating sleeve rotates, the L-shaped swing arm moves away from the center of the rotating sleeve under the action of centrifugal force. The end of the L-shaped swing arm abuts against the inclined portion of the triangular apex.

[0012] As a preferred embodiment of the present invention, the rib-stripping mechanism includes a plurality of sliding sleeves evenly distributed on the inner wall of the rotating sleeve, a sliding rod slidably connected inside the sliding sleeve, a fixed seat fixedly connected to one end of the sliding rod near the center of the rotating sleeve, and a rib-stripping knife detachably connected to one side of the fixed seat near the center of the rotating sleeve.

[0013] As a preferred embodiment of the present invention, the outer wall of the rotating sleeve is rotatably connected to a drive gear ring, one end of the push rod is rotatably connected to the side of the drive gear ring, the other end of the push rod is rotatably connected to the side of the fixed seat, and the outer wall of the rotating sleeve is provided with a second clearance groove, through which the push rod passes.

[0014] As a preferred embodiment of the present invention, the outer wall of the rotating sleeve is provided with a plurality of sliding grooves, which are arranged along the axial direction of the rotating sleeve. A positioning collar is slidably connected to the sliding groove, and a limiting block that cooperates with the driving gear ring is provided on the side of the positioning collar. When the limiting block abuts against the outer wall of the driving gear ring, the angle of the driving gear ring is locked.

[0015] As a preferred embodiment of the present invention, the clamping and feeding mechanism includes a transverse sliding seat slidably connected to the surface of the base, a feeding device for driving the transverse sliding seat to move along the length of the base is provided on the base, a U-shaped frame is provided at one end of the transverse sliding seat away from the base, clamping plates for clamping reinforcing bars are slidably connected to both sides of the U-shaped frame, and a clamping screw for driving the clamping plates to move is rotatably connected to the U-shaped frame.

[0016] As a preferred embodiment of the present invention, the side of the U-shaped frame is provided with a length adjustment component for the drive collar to move away from the drive gear ring, and the inside of the sliding sleeve is provided with a spring for the drive positioning collar to move away from the center of the rotating sleeve.

[0017] As a preferred embodiment of the present invention, the length adjustment assembly includes a push guide rod slidably connected to both sides of the U-shaped frame. A push plate is provided at one end of the push guide rod near the rotating seat. A push screw is threadedly connected to the middle of the U-shaped frame. The end of the push screw is rotatably connected to the side of the push plate. The two ends of the push plate pulley are provided with push ball heads that cooperate with the positioning collar. The two push ball heads are located on both sides of the rotating sleeve, and the push ball heads are at the same height as the axis of the rotating sleeve.

[0018] The present invention has the following advantages:

[0019] 1. Solving the slippage problem and improving thread accuracy: By adopting a forced synchronous transmission mechanism consisting of a fixed gear ring, a driven gear, a first gear, and a second gear, the rotation of the thread rolling wheel and the revolution of the rotating sleeve are completely synchronized and the speed ratio is constant. This structure overcomes the defect of slippage caused by the thread rolling wheel relying on friction for rotation in existing technologies, thus ensuring high thread accuracy and full thread profile in the machining of the outer wall of the reinforcing bar.

[0020] 2. Achieve universal processing and improve equipment applicability: By setting up a spacing adjustment component, the maximum opening diameter of the thread rolling wheel can be precisely adjusted by utilizing the L-shaped swing arm in conjunction with the inclined surface of the triangular apex block under centrifugal force. This structural design allows the same machine to process steel bars of different diameters without changing the thread rolling mechanism, significantly improving the versatility and economy of the equipment.

[0021] 3. Simplified operation process and improved automation level: In the clamping and feeding mechanism of this invention, the transverse moving seat is driven by the feeding device, and the automatic retraction of the rib-peeling knife is realized by the linkage between the push ball head and the positioning collar in the rib-peeling process. This linkage design simplifies the control logic, reduces manual intervention, and enables the equipment to automatically enter the thread rolling process after rib peeling, thereby improving processing efficiency and automation level.

[0022] 4. Compact structure and convenient maintenance: The rib stripping mechanism and the thread rolling mechanism are integrated at both ends of the same rotating sleeve, and the thread rolling mechanism adopts a centrifugal force-driven floating L-shaped swing arm structure. This integrated and modular design makes the overall structure more compact and reduces the size of the equipment. At the same time, the fixed plate and the inner wall of the rotating sleeve, as well as the rib stripping knife and the fixed base, are detachably connected, which facilitates the replacement of the cutter and the thread rolling wheel and daily maintenance.

[0023] 5. Stable and reliable processing: By embedding carbide teeth in the V-groove of the clamping plate, combined with the self-centering clamping of the positive and negative threaded clamping screws, the clamping stability of the reinforcing bar during high-speed rotation processing is ensured, preventing circumferential slippage of the workpiece. Meanwhile, the rotating sleeve is supported by tapered roller bearings and equipped with a good seal, ensuring long-term stable operation of the equipment under harsh working conditions. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of a rebar stripping and threading machine with adjustable diameter.

[0026] Figure 2 This is a front view of a rebar stripping and threading machine with an adjustable diameter.

[0027] Figure 3 This is a schematic diagram of the clamping and feeding mechanism in a rebar stripping and threading machine with adjustable diameter.

[0028] Figure 4 This is a schematic diagram of the U-shaped frame in a rebar stripping and threading machine with adjustable diameter.

[0029] Figure 5 This is a schematic diagram of the tail support structure in a rebar stripping and threading machine with adjustable diameter.

[0030] Figure 6 This is a schematic diagram of the rotating sleeve in a rebar stripping and threading machine with adjustable diameter.

[0031] Figure 7 This is a schematic diagram of the structure of a rebar stripping and threading machine with adjustable diameter when the drive gear ring separates from the limit block.

[0032] Figure 8 This is a schematic diagram of the structure of a rebar stripping and threading machine with adjustable diameter, showing how the drive gear ring adjusts the position of the stripping blade.

[0033] Figure 9 This is a schematic diagram of the meshing connection between the driven gear and the fixed gear ring in a rebar stripping and threading machine with adjustable diameter.

[0034] Figure 10 This is a schematic diagram of the thread rolling mechanism in a rebar stripping and threading machine with adjustable diameter.

[0035] Figure 11 This is a schematic diagram of the structure of an adjustable diameter rebar stripping and threading machine, showing the cooperation between an L-shaped swing arm and a triangular top block.

[0036] Figure 12 This is a schematic diagram of the engagement of the first and second gears in a rebar stripping and threading machine with adjustable diameter.

[0037] Figure 13 for Figure 12 The front view.

[0038] In the diagram: 1. Base; 2. Clamping and feeding mechanism; 3. Support seat; 4. Rotating sleeve; 5. Rib stripping mechanism; 6. Thread rolling mechanism; 7. Feeding device; 8. Transverse seat; 9. U-shaped frame; 10. Clamping plate; 11. Clamping screw; 12. Push plate; 13. Push guide rod; 14. Push screw; 15. Push ball head; 16. Length adjustment assembly; 17. Rotary drive device; 18. Tail bracket; 19. Fixed gear ring; 20. Drive gear ring; 21. Slide groove; 22. Limiting block; 23. 24. Positioning collar; 25. Sliding sleeve; 26. Sliding rod; 27. Fixed seat; 28. Rib stripping knife; 29. ​​Second clearance groove; 30. Push rod; 31. Drive collar; 32. Deflection drive device; 33. First clearance groove; 34. Triangular top block; 35. Fixed plate; 36. Fixed ring; 37. L-shaped swing arm; 38. First gear; 39. Second rotating shaft; 40. Thread rolling wheel; 41. First rotating shaft; 42. Driven gear; 43. Reinforcing bar; 44. Spacing adjustment assembly. Detailed Implementation

[0039] The technical solutions of the embodiments 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In one embodiment, see Figure 1 and Figure 2 A rebar stripping and threading machine with adjustable diameter includes a base 1, a clamping and feeding mechanism 2, a support base 3, a rotating sleeve 4, a rib stripping mechanism 5, a thread rolling mechanism 6, and a spacing adjustment component 44.

[0041] The base 1 is welded from structural steel, and its surface is treated with rust prevention, providing sufficient rigidity and stability to withstand cutting forces and vibrations during processing. Two parallel linear guide rails are provided on the upper surface of the base 1 to support and guide the transverse sliding seat 8. A support seat 3 is fixedly connected to the right side of the base 1. This support seat 3 has a box-shaped structure and houses a rotary drive device 17. The rotary drive device 17 includes a main motor and a planetary reducer. A drive gear is fixedly connected to the output end of the planetary reducer, meshing with a driven gear ring fixed to the outer wall of the rotating sleeve 4, thereby driving the rotating sleeve 4 to rotate smoothly around its own axis. The rotating sleeve 4 is rotatably connected to the middle of the support seat 3 via two tapered roller bearings. The bearings are grease-lubricated and have good sealing performance, effectively preventing external dust and cutting chips from entering and extending the service life of the equipment. The rotating sleeve 4 has a hollow shaft structure, with a rib-stripping mechanism 5 at its left end and a thread-rolling mechanism 6 at its right end.

[0042] In one instance of this embodiment, please refer to Figure 3 and Figure 4 A clamping and feeding mechanism 2 is provided at the left end of the base 1, used to clamp the reinforcing bar 43 and drive it to be fed axially. Specifically, the clamping and feeding mechanism 2 includes a transverse sliding seat 8 slidably connected to a linear guide rail, and a slider is fixedly connected to the bottom of the transverse sliding seat 8, with the slider slidingly engaged with the linear guide rail. A feeding device 7 is provided on the left side of the base 1. The feeding device 7 adopts a ball screw mechanism driven by a servo motor, and the nut of the ball screw is fixedly connected to the bottom of the transverse sliding seat 8. The servo motor drives the ball screw to rotate through a reducer, thereby driving the transverse sliding seat 8 to move precisely along the length direction of the base 1. Optionally, the feeding device 7 can also adopt an electric push rod, with the output end of the electric push rod abutting against the transverse sliding seat 8. During the rib stripping process, the electric push rod pushes the transverse seat 8 to extend the reinforcing bar 43 into the rotating sleeve 4. When the rib stripping is completed and the end of the reinforcing bar 43 enters the thread rolling wheel 40, the output end of the electric push rod disengages from the transverse seat 8. At this time, the reinforcing bar 43 can continue to move forward by relying solely on the spiral feeding force of the thread rolling wheel 40.

[0043] A U-shaped frame 9 is fixedly connected to the upper surface of the transverse sliding seat 8, with the opening of the U-shaped frame 9 facing upwards. A horizontal guide groove is provided on the upper surface of the U-shaped frame 9, and two opposing clamping plates 10 are slidably connected to the front and rear sides of the guide groove. To enhance the clamping force and prevent the reinforcing bar 43 from slipping, the clamping surface of the clamping plate 10 is provided with a V-shaped groove, inlaid with carbide teeth. Clamping screws 11 are rotatably connected to the front and rear ends of the U-shaped frame 9. These clamping screws 11 are positive and negative threaded screws, with their two sides threadedly connected to the two clamping plates 10 respectively. Rotating the handle of the clamping screw 11 drives the two clamping plates 10 to move synchronously towards or away from each other, achieving self-centering clamping of the reinforcing bar 43, thereby ensuring that the reinforcing bar 43 remains coaxial with the rotating sleeve 4.

[0044] In one instance of this embodiment, please refer to Figures 3-8 The rib-stripping mechanism 5 includes three sets of sliding sleeves 24 evenly distributed circumferentially on the inner wall of the left end of the rotating sleeve 4. Each set of sliding sleeves 24 consists of two sliding sleeves 24 arranged on the left and right sides, and is fixed to the inner wall of the rotating sleeve 4 by bolts. A sliding rod 25 is slidably connected inside the sliding sleeve 24, and the sliding direction of the sliding rod 25 is along the radial direction of the rotating sleeve 4. A fixing seat 26 is fixedly connected to the inner end of the sliding rod 25, and a rib-stripping knife 27 is detachably connected to the inner side of the fixing seat 26 by two hexagonal socket head cap screws. The blade of the rib-stripping knife 27 is arc-shaped, fits well with the surface of the reinforcing bar 43, has a sharp cutting edge, and a long service life.

[0045] The left outer wall of the rotating sleeve 4 is rotatably connected to a drive gear ring 20 via a bearing. Three push rods 29, each corresponding to a fixed seat 26, are hinged to the right side of the drive gear ring 20. The other end of each push rod 29 is hinged to the outer side of the fixed seat 26. The left outer wall of the rotating sleeve 4 has three second clearance grooves 28, each corresponding to a push rod 29. The push rods 29 pass through the second clearance grooves 28 and can swing within them. By rotating the drive gear ring 20, the fixed seat 26 can be moved radially synchronously via the push rods 29, thereby adjusting the cutting diameter of the rib-stripping blade 27. In a specific application, its adjustment range can cover steel bars of φ15mm to φ39mm (43 specification).

[0046] The outer wall of the left end of the rotating sleeve 4 is also circumferentially distributed with four sliding grooves 21, which are arranged along the axial direction of the rotating sleeve 4. A positioning collar 23 is slidably connected in the sliding groove 21, and four limiting blocks 22 that cooperate with the drive gear ring 20 are fixedly connected to the left side of the positioning collar 23. When the limiting block 22 abuts against the outer wall of the drive gear ring 20, the angle of the drive gear ring 20 is locked, thereby fixing the cutting diameter of the rib stripper 27. A compression spring is provided inside the sliding sleeve 24. The outer end of the spring abuts against the bottom of the sliding sleeve 24, and the inner end abuts against the outer end of the sliding rod 25. The elastic force of the spring makes the sliding rod 25 always have an outward tendency.

[0047] A length adjustment assembly 16 is provided on the right side of the U-shaped frame 9, used to drive the positioning collar 23 to move to the right to release the lock on the drive gear ring 20. The length adjustment assembly 16 includes two push guide rods 13 slidably connected to the front and rear sides of the U-shaped frame 9, with their axes parallel to the axis of the rotating sleeve 4. The right ends of the two push guide rods 13 are fixedly connected to a push plate 12, and a push screw 14 is threadedly connected to the middle of the U-shaped frame 9. The right end of the push screw 14 is rotatably connected to the left side of the push plate 12 via a thrust bearing. Two push ball heads 15 are fixedly connected to the front and rear ends of the push plate 12. The two push ball heads 15 are symmetrically distributed on the front and rear sides of the rotating sleeve 4 and are at the same height as the axis of the rotating sleeve 4. When it is necessary to adjust the rib stripping length, the push screw 14 is rotated, causing the push plate 12 and the push ball heads 15 to move to the right. When the U-shaped frame 9 moves the push ball head 15 to the right until it contacts the positioning collar 23, the push ball head 15 will push the positioning collar 23 to the right along the slide groove 21, causing the limit block 22 to separate from the drive gear ring 20 and release the lock. At this time, the elastic force of the compressed spring causes the slide rod 25 to move outward, causing the rib stripping knife 27 to disengage from the rebar 43, thereby realizing the automatic adjustment of the rib stripping length.

[0048] In one instance of this embodiment, please refer to Figure 5 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 The thread rolling mechanism 6 includes three sets of fixing plates 34 evenly distributed on the inner wall of the right end of the rotating sleeve 4. The fixing plates 34 are fixed to the inner wall of the rotating sleeve 4 by bolts. The inner ends of the multiple fixing plates 34 are jointly fixedly connected to the outer wall of the fixing ring 35. The fixing ring 35 is concentrically arranged with the rotating sleeve 4 to improve the rigidity of the fixing plates 34 and ensure the synchronous movement of each thread rolling wheel 40.

[0049] Each fixed plate 34 has a first rotating shaft 41 rotatably connected to its center via two deep groove ball bearings. The axis of the first rotating shaft 41 is parallel to the axis of the rotating sleeve 4. One end of an L-shaped swing arm 36 is rotatably connected to the center of the first rotating shaft 41, with the bent portion of the L-shaped swing arm 36 facing the center of the rotating sleeve 4. The bent portion of the L-shaped swing arm 36 is rotatably connected to a second rotating shaft 39 via two deep groove ball bearings. A first gear 37 is fixedly connected to the left end of the first rotating shaft 41, and a second gear 38 is fixedly connected to the left end of the second rotating shaft 39. The first gear 37 and the second gear 38 are always meshed. A thread rolling wheel 40 is fixedly connected to the right end of the second rotating shaft 39. A tail bracket 18 is fixedly connected to the right end of the base 1, and a fixed gear ring 19 is fixedly mounted on the left end of the tail bracket 18. The fixed gear ring 19 is coaxially arranged with the rotating sleeve 4. A driven gear 42 is fixedly connected to the right end of the first rotating shaft 41, and the driven gear 42 is always meshed with the fixed gear ring 19.

[0050] The aforementioned fixed gear ring 19, driven gear 42, first gear 37, and second gear 38 together form a forced synchronous transmission mechanism with a precisely designed transmission ratio. When the rotating sleeve 4 revolves, the driven gear 42 rolls along the fixed gear ring 19, driving the first rotating shaft 41 to rotate at a specific speed; simultaneously, the first gear 37 drives the second gear 38 to rotate in the opposite direction, ultimately causing the thread rolling wheel 40 to achieve synchronous rotation. By rationally selecting the number of teeth of each gear, the thread rolling wheel 40 can obtain different speed ratios to adapt to the processing requirements of steel bars 43 with different diameters. For example, the speed ratio of gear set 1 is 1.23, suitable for φ16-φ22mm steel bars 43, using a 2.5mm pitch thread rolling wheel 40; the speed ratio of gear set 2 is 1.40, suitable for φ25-φ40mm steel bars 43, using a 3.0mm pitch thread rolling wheel 40.

[0051] A spacing adjustment component 44 is provided on the outer wall of the right end of the rotating sleeve 4. This component is used to adjust the maximum spacing between the thread rolling wheel 40 and the center of the rotating sleeve 4, i.e., the opening diameter of the thread rolling wheel 40. The spacing adjustment component 44 includes three first clearance grooves 32 formed on the outer wall of the right end of the rotating sleeve 4. The first clearance grooves 32 extend radially through the rotating sleeve 4. A drive collar 30 is rotatably connected to the outer side of the right end of the rotating sleeve 4 via a bearing. Three triangular apexes 33, corresponding one-to-one with the first clearance grooves 32, are fixedly connected to the inner surface of the drive collar 30. The ends of the triangular apexes 33 penetrate the first clearance grooves 32 and extend into the interior of the rotating sleeve 4. A deflection drive device 31 is fixedly installed on the outer wall of the rotating sleeve 4. The deflection drive device 31 adopts a worm gear mechanism with a self-locking function. The output end of the deflection drive device 31 is connected to the drive collar 30 for transmission. By rotating the handle of the deflection drive device 31, the operator can drive the drive collar 30 to rotate around the axis of the rotating sleeve 4.

[0052] When the rotating sleeve 4 rotates, the L-shaped swing arm 36 swings away from the center of the rotating sleeve 4 under the action of centrifugal force, and its outer end abuts against the inclined surface of the triangular top block 33. The inclined surface of the triangular top block 33 limits the maximum swing angle of the L-shaped swing arm 36 through physical obstruction, thereby controlling the maximum opening distance of the thread rolling wheel 40. By rotating the drive collar 30, the circumferential position of the triangular top block 33 can be changed, thereby changing the maximum swing angle that the L-shaped swing arm 36 can reach, realizing precise adjustment of the maximum gap of the thread rolling wheel 40, with an adjustment range of φ16mm to φ41mm.

[0053] The following describes the working process of this invention in detail, taking the processing of φ25mm steel bar 43 as an example. The process includes the following steps:

[0054] Step S1: Equipment Debugging

[0055] First, rotate the clamping screw 11 to open the two clamping plates 10 to a suitable width. After cutting the end of the φ25mm steel bar 43 flat, place it between the two clamping plates 10, and then rotate the clamping screw 11 in the opposite direction to drive the two clamping plates 10 to move synchronously towards each other, thereby firmly clamping the steel bar 43.

[0056] Next, rotate the jacking screw 14 to move the jacking plate 12 and the jacking ball head 15 to the right to adjust the length of the rib stripping of the reinforcing bar 43.

[0057] Then, move the positioning collar 23 to the right to disengage the limiting block 22 from the drive gear ring 20. In this state, rotate the drive gear ring 20, which pushes the rib-stripping blade 27 to move radially synchronously via the push rod 29, adjusting the rib-stripping diameter to 23.7mm (this size is the diameter after rib stripping of a standard φ25mm steel bar 43). After adjustment, move the positioning collar 23 to the left to re-engage the limiting block 22 with the drive gear ring 20, thereby locking the angle of the drive gear ring 20 and fixing the position of the rib-stripping blade 27.

[0058] Finally, turn the handle of the deflection drive device 31 to drive the drive collar 30 to rotate, which in turn drives the triangular top block 33 to rotate, adjusting the maximum spacing of the thread rolling wheel 40 to 26mm (this size is the major diameter of the thread of the φ25mm steel bar 43).

[0059] Step S2: Start the device

[0060] The main motor of the rotary drive device 17 is started. Through a planetary reducer and gear transmission, the main motor drives the rotating sleeve 4 to rotate at a constant speed. The rotation of the rotating sleeve 4 causes the rib stripping mechanism 5 and the thread rolling mechanism 6 mounted on it to revolve together. Simultaneously, due to the action of the forced synchronous transmission mechanism, the driven gear 42 rolls along the fixed gear ring 19, driving the first rotating shaft 41 to rotate; the first gear 37 rotates accordingly, thereby driving the second gear 38 and the thread rolling wheel 40 to rotate in the opposite direction at a predetermined speed ratio. This step ensures that the thread rolling wheel 40 obtains precise, slippage-free rotational motion while revolving around the central axis.

[0061] Step S3: Rib Removal Process

[0062] The servo motor of the feeding device 7 is started, driving the transverse carrier 8 to move to the right at a constant speed along the linear guide rail. When the end of the reinforcing bar 43 enters the rib-removing mechanism 5, the high-speed rotating rib-removing blade 27 contacts the surface of the reinforcing bar 43 and begins to cut and remove the longitudinal and transverse ribs and oxide scale from the surface of the reinforcing bar 43. As the reinforcing bar 43 continues to feed to the right, the rib-removing blade 27 cuts a smooth cylindrical surface with a length of 32mm at the end of the reinforcing bar 43. When the transverse carrier 8 advances to the predetermined position, the push ball head 15 contacts the positioning collar 23 and pushes it to the right, causing the limiting block 22 to disengage from the drive gear ring 20. At this time, under the elastic force of the compression spring, the slide rod 25 drives the rib-removing blade 27 to move outward, thereby automatically disengaging from the surface of the reinforcing bar 43 and ending the rib-removing process. This step achieves automatic retraction of the rib-removing blade 27 through mechanical linkage, without the need for separate control.

[0063] Step S4: Thread rolling process

[0064] After the rib stripping process is completed, the reinforcing bar 43 continues to feed to the right, and its smooth end with stripped ribs enters the thread rolling mechanism 6. The high-speed rotating thread rolling wheel 40 opens outward under centrifugal force and tightly adheres to the surface of the reinforcing bar 43. Under the high pressure and high speed of the thread rolling wheel 40, the metal on the surface of the reinforcing bar 43 undergoes plastic flow, precisely filling the tooth grooves of the thread rolling wheel 40, thereby continuously forming a standard straight thread at the end of the reinforcing bar 43. During this process, because the rotation of the thread rolling wheel 40 is ensured by a forced synchronous transmission mechanism, its rotational speed is in a fixed proportion to the revolution speed of the rotating sleeve 4 and is completely synchronized. Therefore, the slippage phenomenon that easily occurs in traditional friction transmission is fundamentally avoided, ensuring the fullness and accuracy of the processed thread profile.

[0065] Step S5: Automatic tool retraction and reset

[0066] Once the thread length reaches the preset value, the servo motor of the feeding device 7 automatically stops feeding and immediately reverses direction, driving the transverse support 8 to move rapidly to the left, thus retracting the tool. Simultaneously, the rotary drive device 17 controls the rotating sleeve 4 to rotate in the opposite direction by a small angle, completely disengaging the rebar 43 from the thread profile of the thread rolling wheel 40. After the rebar 43 has completely exited the thread rolling mechanism 6 and the rib stripping mechanism 5, the main motor automatically stops, completing the processing of a complete thread.

[0067] This invention provides a rebar stripping and threading machine with adjustable diameter. By maintaining a constant speed ratio between the revolution and rotation of the thread rolling wheel 40, it fundamentally overcomes the defect of slippage caused by the thread rolling wheel 40 relying on friction for rotation in existing technologies, thereby significantly improving the thread processing accuracy. Simultaneously, through the cooperation of the triangular top block 33 and the L-shaped swing arm 36 in the spacing adjustment assembly 44, precise adjustment of the spacing of the thread rolling wheel 40 is achieved, enabling the same equipment to process rebars 43 of different diameters, improving the equipment's versatility. Furthermore, the clamping and feeding mechanism 2 and the rib stripping mechanism 5, through the linkage of the pushing ball head 15 and the positioning collar 23, achieve automatic retraction of the blade after rib stripping, simplifying the control process and improving the degree of automation.

[0068] 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 the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A rebar stripping and threading machine with adjustable diameter, comprising a base, one end of which is provided with a clamping and feeding mechanism for clamping the rebar, characterized in that, The base is provided with a support seat on the side away from the clamping and feeding mechanism. A rotating sleeve is rotatably connected to the support seat. It also includes a rib stripping mechanism and a thread rolling mechanism. The rib-stripping mechanism is located at one end of the rotating sleeve near the clamping and feeding mechanism and is used to cut the outer wall of the reinforcing bar. The thread rolling mechanism is located at the end of the rotating sleeve away from the clamping and feeding mechanism. It includes multiple fixed plates circumferentially distributed on the inner wall of the rotating sleeve. A first rotating shaft is rotatably connected to the middle of the fixed plates. The end of an L-shaped swing arm is rotatably connected to the middle of the first rotating shaft. The bent portion of the L-shaped swing arm faces the center of the rotating sleeve. A second rotating shaft is rotatably connected to the bent portion of the L-shaped swing arm. The second rotating shaft rotates synchronously in the opposite direction to the first rotating shaft. A thread rolling wheel is provided at the end of the second rotating shaft. A gap adjustment component is provided on the outer wall of the rotating sleeve for adjusting the maximum gap between the thread rolling wheel and the center of the rotating sleeve. A tail support is provided at the end of the base away from the clamping and feeding mechanism. A fixed gear ring coaxial with the rotating sleeve is provided on the tail support. A driven gear that meshes with the fixed gear ring is fixedly connected to the end of the first rotating shaft.

2. The adjustable diameter rebar stripping and threading machine according to claim 1, characterized in that, The first rotating shaft has a first gear at the end away from the driven gear, and the second rotating shaft has a second gear at the end away from the thread rolling wheel that meshes with the first gear. The middle part of the support base has a rotary drive device for driving the rotating sleeve to rotate, and the rotational speed of the thread rolling wheel is greater than the rotational speed of the rotating sleeve.

3. The adjustable diameter rebar stripping and threading machine according to claim 1, characterized in that, The outer wall of a fixing ring is fixedly connected to one end of the fixing plate near the center of the rotating sleeve. The fixing ring is concentrically arranged with the rotating sleeve, and the fixing plate is detachably connected to the inner wall of the rotating sleeve.

4. The adjustable diameter rebar stripping and threading machine according to claim 1, characterized in that, The spacing adjustment assembly includes a first clearance groove disposed on the outer wall of the rotating sleeve. A drive ring coaxially disposed with the rotating sleeve is rotatably connected to the outer side of the rotating sleeve. A triangular apex is disposed on the side of the drive ring near the center of the rotating sleeve. The end of the triangular apex passes through the first clearance groove and extends into the inner wall of the rotating sleeve. A deflection drive device is disposed on the outer wall of the rotating sleeve to drive the drive ring to rotate along the outer wall of the rotating sleeve. When the rotating sleeve rotates, the L-shaped swing arm moves away from the center of the rotating sleeve under the action of centrifugal force. The end of the L-shaped swing arm abuts against the inclined part of the triangular apex.

5. The adjustable diameter rebar stripping and threading machine according to claim 1, characterized in that, The rib-stripping mechanism includes multiple sliding sleeves evenly distributed on the inner wall of the rotating sleeve. A sliding rod is slidably connected inside the sliding sleeve. A fixed seat is fixedly connected to one end of the sliding rod near the center of the rotating sleeve. A rib-stripping knife is detachably connected to one side of the fixed seat near the center of the rotating sleeve.

6. The adjustable diameter rebar stripping and threading machine according to claim 5, characterized in that, The outer wall of the rotating sleeve is rotatably connected to a drive gear ring, one end of the push rod is rotatably connected to the side of the drive gear ring, and the other end of the push rod is rotatably connected to the side of the fixed seat. The outer wall of the rotating sleeve is provided with a second clearance groove, and the push rod passes through the second clearance groove.

7. A rebar stripping and threading machine with adjustable diameter according to claim 6, characterized in that, The outer wall of the rotating sleeve is circumferentially distributed with multiple sliding grooves. The sliding grooves are arranged along the axial direction of the rotating sleeve. A positioning collar is slidably connected to the sliding groove. A limiting block that cooperates with the driving gear ring is provided on the side of the positioning collar. When the limiting block abuts against the outer wall of the driving gear ring, the angle of the driving gear ring is locked.

8. The adjustable diameter rebar stripping and threading machine according to claim 7, characterized in that, The clamping and feeding mechanism includes a transverse sliding seat slidably connected to the surface of the base. A feeding device is provided on the base to drive the transverse sliding seat to move along the length of the base. A U-shaped frame is provided at one end of the transverse sliding seat away from the base. Clamping plates for clamping reinforcing bars are slidably connected to both sides of the U-shaped frame. A clamping screw for driving the clamping plates to move is rotatably connected to the U-shaped frame.

9. A rebar stripping and threading machine with adjustable diameter according to claim 8, characterized in that, The side of the U-shaped frame is provided with a length adjustment component for the drive collar to move away from the drive gear ring, and the inside of the sliding sleeve is provided with a spring for the drive positioning collar to move away from the center of the rotating sleeve.

10. A rebar stripping and threading machine with adjustable diameter according to claim 9, characterized in that, The length adjustment assembly includes push guide rods slidably connected to both sides of the U-shaped frame. A push plate is provided at one end of the push guide rod near the rotating seat. A push screw is threadedly connected to the middle of the U-shaped frame. The end of the push screw is rotatably connected to the side of the push plate. Push ball heads that cooperate with positioning collars are provided at both ends of the pulley of the push plate. The two push ball heads are located on both sides of the rotating sleeve, and the push ball heads are at the same height as the axis of the rotating sleeve.

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