A continuous cutting and conveying system and method for universal joint cross shaft bar stock of freight cars

Abstract

This application discloses a continuous cutting and conveying system and method for universal joint cross shaft bar stock of trucks, specifically relating to the technical field of automotive parts processing equipment. It includes a main frame, a feeding mounting base, and a guiding mechanism. The main frame is sequentially fixed with a feeding mounting base, a straightening frame, a guiding mechanism, and a wiping mechanism along the bar stock conveying direction. The feeding mounting base is equipped with multiple feeding guide wheel sets for initial guiding and limiting of the bar stock. The straightening frame is arranged with multiple straightening rollers. This application utilizes an adjustable design between the upper and lower guide rollers in the guiding mechanism to flexibly adapt and adjust the gap according to the actual outer diameter of bar stock of different specifications, forming a stable radial constraint on the bar stock. This prevents skewing and shaking during bar stock conveying and cutting, effectively ensuring the straightness of the bar stock conveying, thereby improving the dimensional accuracy and end-face processing quality of the cutting process.

Description

Technical Field

[0001] This application relates to the field of automotive parts processing equipment technology, and more specifically, to a continuous cutting and conveying system and method for universal joint cross shaft bar stock for trucks. Background Technology

[0002] Universal joint cross shafts are core load-bearing components of truck transmission systems. Bar stock cutting to length is a key material preparation process before forging. The dimensional accuracy, end face flatness, and perpendicularity of the cut billet directly affect the subsequent forging quality and the mechanical properties of the finished product. With the large-scale development of the truck parts manufacturing industry, the industry's requirements for the production efficiency, processing consistency, and operational stability of the bar stock cutting process are gradually increasing. Achieving continuous automated collaborative operation of the entire process of feeding, length cutting, and conveying is an important research and development direction for this type of processing equipment. Existing publication number CN105689631B discloses an automatic cutting and conveying mechanism for a cold heading machine, including a cutting device and a pushing device. The cutting device is connected to the pushing device. The cutting device includes a cutting seat, a cutting blade, and a cutting clamp, both of which are mounted on the cutting seat. The pushing device includes a pushing seat, a pushing assembly, and a spring return assembly, both mounted on the pushing seat. A pushing platform is located in the middle of the pushing seat, connected to the cutting seat. The pushing assembly is located on the upper side of the pushing platform, and the spring return assembly is located on the lower side. This mechanism has a simple structure, reliable conveying, strong targeting, high automation, and high production efficiency, effectively solving the cutting and conveying problem of cold heading machines and realizing an integrated production line for cutting, feeding, feeding, and forming. In the process of developing this application, the inventors discovered the following problems with the prior art: In actual use, the existing bar cutting and conveying equipment has a guide mechanism with a fixed gap structure, which cannot flexibly adjust the matching gap according to the actual outer diameter of the bar. It is difficult to form a stable radial constraint on the bar, which makes it easy for the bar to deviate and sway during the conveying process. The straightness of the conveying cannot be guaranteed, which in turn has an adverse effect on the dimensional accuracy and end face processing quality of the subsequent cutting process. Therefore, in order to address the above problems, a continuous cutting and conveying system and method for universal joint cross shaft bar stock of freight cars is proposed. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, this application provides a continuous automatic cutting and conveying system for universal joint cross shaft bar stock of freight cars, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: a continuous automatic cutting and conveying system for universal joint cross shaft bar stock of freight cars, comprising a main frame, a feeding mounting base, and a guiding mechanism. The main frame is sequentially and fixedly mounted with a feeding mounting base, a straightening frame, a guiding mechanism, and a wiping mechanism along the bar stock conveying direction. The feeding mounting base is equipped with multiple feeding guide wheel sets for initial guiding and limiting of the bar stock. The straightening frame is arranged with multiple sets of straightening rollers and is equipped with a servo continuous feeding mechanism to achieve constant-speed, quantitative, and continuous feeding of the bar stock. A cutting machine base is fixedly connected to the discharge end of the main frame. The cutting machine base is equipped with a fixed-length bracket, a movable slide, and a drive cylinder. The movable slide is connected via a linear guide rail. The movable slide is slidably mounted on the cutting machine base. Its position can be adjusted in a direction perpendicular to the bar conveying direction to accommodate blanks of different lengths. A fixed-length guide rod is horizontally inserted through the fixed-length bracket. A sliding blade holder is mounted on one side of the movable slide. The sliding blade holder has a cutting groove for the bar to pass through, and a cutting blade, a carbide shearing blade, is installed in the cutting groove and is detachably mounted therein. The cutting machine base also has a bar clamping and positioning structure, including an upper clamping block, a lower clamping block, and a clamping cylinder, which securely clamps the bar during cutting. A cutting area protective cover is provided around the cutting machine base. A control box is located on one side of the main frame.

[0005] By adopting the above technical solution, each station on the main frame is coaxially connected along the conveying direction. With the coordination of the control box, the conveying and cutting actions are controlled to realize the continuous automatic feeding, straightening, length setting and cutting of bar stock, which effectively improves production efficiency, stabilizes processing accuracy and reduces manual operation costs.

[0006] Preferably, the wiping mechanism includes a wiping support, a square groove is provided near the top of the wiping support, and a fixed wiping clamp is fixedly connected to the top of the square groove. A lower wiping clamp is slidably connected to the bottom wall of the square groove. A clamping spring is connected to the bottom of the lower wiping clamp, and a spring guide post is sleeved inside the clamping spring. A collection box is pulled out on one side of the bottom of the wiping support, and a handle is fixedly connected to the side of the collection box. The fixed wiping clamp and the lower wiping clamp form a spring adaptive compression wiping structure to adapt to the outer diameter error of the bar material and realize dynamic dirt and dust removal during continuous conveying.

[0007] By adopting the above technical solution, the wiping clamp block driven by the clamping spring adheres to the fixed wiping clamp block for cleaning the bar stock. Combined with the pull-out collection box to collect impurities, the surface of the bar stock can be effectively cleaned, improving the quality of the cut end face. The impurity cleaning operation is convenient and efficient.

[0008] Preferably, the guiding mechanism includes multiple adjusting slots on the top of the straightening machine frame, a lifting slider is slidably mounted in the adjusting slot, limit guide strips are provided on both sides of the lifting slider, an upper guide roller is rotatably mounted on one side of the lifting slider, a pressing crossbeam is fixed on the top of the adjusting slot, an adjusting screw is vertically mounted on the pressing crossbeam, an adjusting handwheel is fixedly connected to the top of the adjusting screw, and a lower guide roller is rotatably mounted on the lower part of the straightening machine frame.

[0009] By adopting the above technical solution, rotating the adjusting handwheel drives the lifting slider to move along the adjusting groove via the adjusting screw, which can flexibly adjust the distance between the upper guide roller and the lower guide roller, adapt to different specifications of bar stock, enhance the straightness of conveying, and reduce deviation problems.

[0010] Preferably, a mounting plate is fixedly connected to one side of the movable slide block, and a fixing frame is fixedly connected to the side wall of the mounting plate. The sliding knife holder can slide up and down in the middle of the fixing frame. The driving cylinder is fixedly installed on the top of the fixing frame. The output end of the driving cylinder extends downward and is fixedly connected to the top of the sliding knife holder. Vertical guide rails are symmetrically arranged on both sides of the fixing frame to slide and cooperate with the sliding knife holder, eliminating the single cylinder drive sway error and ensuring the consistency of the continuous cutting section.

[0011] By adopting the above technical solution, the drive cylinder directly drives the sliding knife holder to slide vertically along the fixed frame. The mounting plate and the moving slide share the reaction force, making the cutting force stable and uniform, improving the flatness of the cut, and enhancing the structural stability of the equipment operation.

[0012] Preferably, the length-fixing bracket is vertically fixed to the top of the cutting machine base, the length-fixing guide rod is inserted through the middle of the length-fixing bracket, the length-fixing guide rod is coaxially arranged with the bar stock conveying direction, the feed end of the length-fixing guide rod is arranged corresponding to the discharge side of the cutting groove, and is used to abut the end of the bar stock to achieve length-fixing, and the end of the length-fixing guide rod is equipped with a contact sensing sensor to realize automatic length-fixing and signal feedback to trigger cutting, thus eliminating bar stock springback length-fixing errors.

[0013] By adopting the above technical solution, the length-fixing guide rod coaxially abuts against the end of the bar stock to achieve length-fixing. The cutting specifications can be changed by adjusting its extension length on the length-fixing bracket. The length-fixing positioning is accurate and reliable, the length adjustment is simple, and it is suitable for the production needs of various cross-shaft blanks.

[0014] Preferably, the feeding guide wheel assembly includes multiple sets of vertically and horizontally arranged guide wheels. Each set of guide wheels has an arc-shaped groove on its wheel surface that matches the outer diameter of the bar stock. The multiple sets of guide wheels enclose and form a horizontal feeding channel. The axis of the feeding channel is coaxially arranged with the straightening channel of the straightening frame. The outer side of the feeding guide wheel assembly is provided with an anti-deviation limiting stop to ensure that the bar stock is transported smoothly and without swerving during high-speed continuous feeding.

[0015] By adopting the above technical solution, the feed guide wheel assembly forms a feed channel from multiple directions. The arc-shaped groove on the wheel surface fits the outer wall of the bar stock, which can form a stable radial limit on the bar stock, avoid deviation and movement during feeding, reduce conveying resistance, and ensure a smooth and stable feeding process.

[0016] Preferably, a pair of fixing rods are fixedly connected to the bottom of the fixing frame. The pair of fixing rods vertically pass through both ends of the bottom of the sliding tool holder. A limiting base plate is fixedly connected to the bottom end of the fixing rod. A return spring is sleeved on the top of the limiting base plate. The two ends of the return spring abut against the bottom surface of the sliding tool holder and the top surface of the limiting base plate, respectively. A dustproof cloth is provided on the surface of the return spring. The top end of the dustproof cloth is connected to the bottom surface of the sliding tool holder, and the bottom end is connected to the top surface of the limiting base plate, so as to prevent cutting debris and oil stains from entering the gap of the return spring.

[0017] By adopting the above technical solution, the reset spring pushes the tool holder back to its original position along the fixed rod. With the limit plate limiting the stroke and the dustproof cloth covering the spring gaps, the tool holder can be reset smoothly, preventing debris and oil from entering, extending the service life of the spring, and reducing equipment jamming failures.

[0018] Preferably, a material collection trough is provided on the inner side of the cutting machine base, and a discharge guide plate is provided on the feeding side of the material collection trough. The discharge guide plate is inclined downward from the feeding side to the discharge side and is located directly below the cutting groove. A wear-resistant buffer pad is provided on the surface of the discharge guide plate. The material collection trough is provided with an external chip removal structure to adapt to the large amount of iron chips generated by continuous cutting and the workpiece unloading requirements.

[0019] By adopting the above technical solution, the inclined feeding guide plate buffers the impact force of the billet falling and guides the billet to slide into the collection trough for centralized storage, which can avoid the billet falling and being deformed, ensure the appearance quality of the billet, and reduce the workload of manual handling and transportation.

[0020] Preferably, the control box has an operation panel on top, a dust cover hinged above the operation panel, multiple control buttons on the top surface of the control box, and a programmable logic controller (PLC) integrated inside the control box. The PLC is electrically connected to the straightening drive mechanism and the drive cylinder to realize fully automatic sequential linkage of feeding, straightening, length setting, cutting and resetting, and integrates functions such as material interruption stop, overload protection and production counting to achieve unmanned continuous production.

[0021] By adopting the above technical solutions, the programmable logic controller in the control box coordinates and regulates the operating rhythm of each mechanism. With the dust cover protecting the operation panel, the automation level and ease of operation of the equipment can be improved, the service life of the panel can be extended, and the controllability of equipment operation can be guaranteed.

[0022] A method for continuous cutting and conveying of universal joint cross shaft bar stock for freight cars includes the following steps: Step S1, Feeding and Guiding: The bar stock enters the feeding mounting seat and is radially limited and initially guided in multiple directions through the feeding channel formed by multiple sets of feeding guide wheels, ensuring that the bar stock smoothly enters the subsequent working position along the set axis; Step S2, Roller Straightening: The bar stock enters the straightening frame and is continuously rolled and straightened by multiple sets of straightening rollers to eliminate the bending deformation of the bar stock. At the same time, it serves the continuous feeding mechanism to achieve constant speed and quantitative continuous feeding of the bar stock. Step S3, Guiding Constraint: After straightening, the bar stock enters the guiding mechanism. By adjusting the distance between the upper and lower guide rollers, it adapts to bars of different diameters, forming a two-way radial constraint on the bar stock to ensure the straightness of the bar stock conveying. Step S4, Surface wiping: The bar stock enters the wiping mechanism. Driven by the clamping spring, the wiping clamp and the fixed wiping clamp together clamp the surface of the bar stock. As the bar stock is fed, the surface oxide scale, oil stains and debris are wiped away. The impurities wiped off fall into the impurity collection box below. Step S5, Fixed Length Positioning: The cleaned bar continues to be conveyed to the cutting station, passing through the cutting groove on the sliding knife holder until the end of the bar abuts the feed end of the fixed length guide rod. The contact sensor triggers the fixed length positioning signal, and the extension length of the fixed length guide rod is adjusted to adapt to different cutting lengths. Step S6, Clamping and Positioning: After receiving the fixed length positioning signal, the control box controls the clamping cylinder to drive the upper and lower clamping blocks to firmly clamp and position the bar stock. Step S7, Cutting execution: The control box controls the drive cylinder to push the sliding tool holder downward along the fixed frame, and the carbide shearing blade in the cutting groove moves downward with the tool holder to complete the cutting of the bar stock; Step S8, Tool Post Reset: After cutting is completed, the drive cylinder is depressurized, and the spring force of the reset spring pushes the sliding tool post to move upward and reset. The dustproof cloth moves synchronously with the tool post as it rises and falls, preventing debris from entering the gap of the reset spring. At the same time, the clamping cylinder is released to release the clamp. Step S9, billet collection: The cut billet falls under the action of gravity, first contacting the inclined feeding guide plate, and then slowly slides down the inclined surface of the guide plate into the collection trough for centralized storage. Step S10, Cyclic execution: Repeat steps S5 to S9 to achieve continuous automatic length setting, clamping, cutting, resetting and billet collection cycle operation of bar stock.

[0023] The technical effects and advantages of this application are as follows: 1. Compared with the prior art, the continuous automatic cutting and conveying system for universal joint cross shaft bar stock of a freight car has an adjustable design for the gap between the upper guide roller and the lower guide roller in the guiding mechanism. This allows for flexible adjustment of the gap according to the actual outer diameter of bar stock of different specifications, forming a stable radial constraint on the bar stock. This avoids skewing and shaking during the bar stock conveying and cutting process, effectively ensuring the straightness of the bar stock conveying, and thus improving the dimensional accuracy and end face processing quality of the cutting process.

[0024] 2. Compared with the existing technology, the continuous automatic cutting and conveying system for universal joint cross shaft bar stock of trucks can adaptively clean impurities on the surface of the bar stock before fixed-length cutting by using the lower wiping clamp block of the wiping mechanism in conjunction with the fixed wiping clamp block. The impurities are collected and cleaned in a collection box, which effectively avoids the impurities from affecting the cutting accuracy, improves the quality of the cut end face, and makes the impurity cleaning operation convenient.

[0025] 3. Compared with the existing technology, this truck universal joint cross shaft bar continuous automatic cutting and conveying system uses a return spring at the bottom of the sliding tool holder in conjunction with a fixed rod and a limiting base plate. When the drive cylinder completes the cutting operation and drives the tool holder to rise, the sliding tool holder is assisted to quickly return to its original position. The dustproof cloth provides full circumferential protection for the return spring, preventing cutting debris and oil from entering the spring gaps and causing jamming and corrosion. This effectively extends the service life of the return spring, ensures smooth operation of the tool holder, and improves the stability of equipment operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the feed guide wheel assembly of this application; Figure 3 This is a schematic diagram of the wiping mechanism of this application; Figure 4 This is a schematic diagram of the guiding mechanism in this application; Figure 5 This is a schematic diagram of the material collection trough in this application; Figure 6 This is a schematic diagram of the structure of the dustproof cloth in this application; Figure 7 This is a schematic diagram of the control box of this application.

[0027] The attached figures are labeled as follows: 1. Main frame; 2. Feed mounting base; 3. Feed guide wheel assembly; 4. Straightening frame; 5. Wiping mechanism; 501. Wiping support; 502. Fixed wiping clamp; 503. Lower wiping clamp; 504. Clamping spring; 505. Spring guide post; 506. Collection box; 507. Handle; 6. Guide mechanism; 601. Adjusting groove; 602. Lifting slider; 603. Upper guide roller; 604. Pressing crossbeam; 605. Adjusting screw; 606. 607. Adjusting handwheel; 708. Lower guide roller; 709. Control box; 7001. Operation panel; 701. Dust cover; 702. Control button; 803. Cutting machine base; 801. Material collection trough; 802. Material discharge guide plate; 9. Fixed length bracket; 10. Fixed length guide rod; 11. Moving slide; 12. Mounting plate; 13. Fixed frame; 14. Sliding knife holder; 15. Cutting groove; 16. Fixed rod; 17. Limiting base plate; 18. Return spring; 19. Dustproof cloth; 20. Drive cylinder. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Example 1 As attached Figures 1 to 7The illustrated truck universal joint cross shaft bar continuous automatic cutting and conveying system includes a main frame 1, a feeding mounting base 2, and a guiding mechanism 6. The main frame 1 is sequentially fixed with the feeding mounting base 2, a straightening frame 4, the guiding mechanism 6, and a wiping mechanism 5 along the bar conveying direction. The feeding mounting base 2 is equipped with multiple feeding guide wheel sets 3 for initial guiding and limiting of the bar. The straightening frame 4 has multiple sets of straightening rollers and is equipped with a servo continuous feeding mechanism. The servo continuous feeding mechanism includes a servo motor, a reducer, and a feeding roller set. The servo motor drives the feeding roller set to rotate through the reducer, achieving constant-speed, quantitative, and continuous feeding of the bar. A cutting machine base 8 is fixedly connected to the discharge end of the main frame 1. The cutting machine base 8 is equipped with a length-fixed bracket 9, a movable slide 11, and a drive cylinder 20. A length-fixed guide rod 10 is horizontally inserted through the length-fixed bracket 9. A contact sensor is embedded at the end of the length guide rod 10 to realize automatic length sensing and signal feedback triggering of cutting, eliminating the error of bar springback length setting. The movable slide 11 is slidably installed on the cutting machine base 8 through a linear guide rail. The movable slide 11 can be adjusted in a direction perpendicular to the bar conveying direction to adapt to the blanking position of different length specifications. A sliding knife holder 14 is mounted on one side of the movable slide 11. The sliding knife holder 14 has a cutting groove 15 for the bar to pass through, and a cutter is installed in the cutting groove 15. The cutter is a carbide shearing knife and is detachably installed in the cutting groove 15. The cutting machine base 8 is also provided with a bar clamping and positioning structure, which includes an upper clamping block, a lower clamping block and a clamping cylinder, to firmly clamp the bar during cutting. A cutting area protective cover is provided around the cutting machine base 8. A control box 7 is provided on one side of the main frame 1.

[0030] During operation, the bar stock passes sequentially along the conveying axis of the main frame 1 through the feeding guide, roller straightening, posture constraint, surface cleaning, and length cutting stations. Each station is coaxially connected, and the control box 7 synchronously regulates the conveying speed and cutting trigger timing, ensuring precise coordination between continuous bar stock feeding and intermittent cutting. No manual intervention is required for loading, unloading, or positioning. This enables fully automated continuous processing of cross-axis bar stock, effectively improving production cycle time and reducing manual labor intensity.

[0031] Example 2 Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 7 As shown below, see details: In a preferred embodiment, when the wiping mechanism 5 is working, the clamping spring 504 pushes the lower wiping clamp 503 upward with its elastic force, so that it and the fixed wiping clamp 502 together clamp the surface of the bar stock. As the bar stock is fed, the surface oxide scale and oil stains are removed by wiping. The debris generated by wiping falls into the lower collection box 506, and can be removed and cleaned by pulling the handle 507. This can effectively clean the surface of the bar stock, improve the quality of the subsequent cutting section, and make the cleaning of impurities convenient and efficient. The fixed wiping clamp 502 and the lower wiping clamp 503 form a spring adaptive pressure wiping structure, which adapts to the outer diameter error of the bar stock and realizes dynamic dirt and dust removal during continuous conveying.

[0032] In a preferred embodiment, when the guide mechanism 6 is working, rotating the adjusting handwheel 606 can drive the adjusting screw 605 to feed vertically, pushing the lifting slider 602 to slide along the adjusting groove 601, thereby adjusting the distance between the upper guide roller 603 and the lower guide roller 607 to adapt to bars of different diameters. At the same time, it forms a two-way constraint on the bars, which can enhance the straightness of the bar conveying, reduce conveying deviation, and make the equipment more adaptable.

[0033] In a preferred embodiment, during the cutting operation, the drive cylinder 20 outputs power vertically, and vertical guide rails are symmetrically arranged on both sides of the fixed frame 13, which slide in cooperation with the sliding knife holder 14 to eliminate the sway error of the single cylinder drive, ensure the consistency of the continuous cutting section, and directly push the sliding knife holder 14 to slide vertically along the inner side of the fixed frame 13. The mounting plate 12 and the movable slide block 11 jointly bear the cutting reaction force to ensure that the running trajectory of the knife holder does not deviate. During the return stroke, it moves upward synchronously with the unloading of the cylinder, which can make the cutting force application more stable, improve the flatness of the cut, and enhance the structural stability of the equipment operation.

[0034] In a preferred embodiment, during the length-fixing operation, the bar stock is continuously fed along the conveying direction until its end abuts against the end face of the length-fixing guide rod 10, triggering a cutting signal. By adjusting the extension length of the length-fixing guide rod 10 on the length-fixing bracket 9, the cutting length of the billet can be flexibly changed, with the guide rod and the bar stock maintaining coaxial contact. This ensures stable length-fixing accuracy, simple length adjustment operation, and suitability for the production of various specifications of cross-shaft billets.

[0035] In a preferred embodiment, during the feeding stage, multiple sets of guide wheels in the feeding guide wheel group 3 jointly enclose the feeding channel from the vertical and horizontal directions. The arc-shaped grooves on the wheel surface are closely fitted with the outer wall of the bar stock. When the bar stock is fed, the guide wheels rotate synchronously, forming a multi-directional radial limit on the bar stock, guiding the bar stock to align with the subsequent straightening channel, which can prevent the bar stock from deviating or shifting during feeding, reduce feeding resistance, and ensure a smooth and stable feeding process.

[0036] In a preferred embodiment, after the cutting is completed, the return spring 18 releases its elastic force along the fixed rod 16, pushing the sliding tool holder 14 upward to quickly return to its original position. The limiting base plate 17 restricts the return stroke, and the dustproof cloth 19 extends and retracts synchronously with the tool holder as it rises and falls, covering the spring gaps throughout the entire process and preventing cutting debris and oil from entering. This ensures that the tool holder's return action is smooth and reliable, extends the service life of the spring, and reduces equipment failures caused by debris jamming.

[0037] In a preferred embodiment, the cut billet falls under the influence of gravity. The surface of the feeding guide plate 802 is provided with a wear-resistant buffer pad, and the collecting trough 801 is provided with an external chip removal structure to accommodate the large amount of iron chips generated by continuous cutting and the workpiece unloading requirements. The chips first contact the inclined feeding guide plate 802 and then slowly slide down the inclined surface of the guide plate into the collecting trough 801 for centralized storage. The feeding guide plate 802 can buffer the impact force of the falling billet, prevent the billet from falling directly and bumping, and make the cut billet collected neatly, reducing the deformation of the end face of the billet due to bumping.

[0038] As a preferred embodiment, before operation, the conveying speed and cutting length parameters are set through the operation panel 701 on the top surface of the control box 7. The internal programmable logic controller synchronously coordinates the running rhythm of the straightening drive and the drive cylinder 20. The dust cover 702 can be closed when the equipment is idle to isolate oil and dust, which can improve the ease of operation and automation of the equipment, extend the service life of the operation panel 701, and ensure the controllability of equipment operation.

[0039] A method for continuous cutting and conveying of universal joint cross shaft bar stock for freight cars includes the following steps: Step S1, Feeding and Guiding: The bar stock enters the feeding mounting base 2 and is radially limited and initially guided in multiple directions through the feeding channel formed by multiple sets of feeding guide wheels 3, ensuring that the bar stock smoothly enters the subsequent working position along the set axis; Step S2, Roller Straightening: The bar stock enters the straightening frame 4 and is continuously rolled and straightened by multiple sets of straightening rollers to eliminate the bending deformation of the bar stock. At the same time, it serves the continuous feeding mechanism to achieve constant speed and quantitative continuous feeding of the bar stock. Step S3, Guiding Constraint: After straightening, the bar stock enters the guiding mechanism 6. By adjusting the distance between the upper guide roller 603 and the lower guide roller 607, it can adapt to bars of different diameters and form a two-way radial constraint on the bar stock to ensure the straightness of the bar stock conveying. Step S4, Surface wiping: The bar stock enters the wiping mechanism 5. Driven by the clamping spring 504, the wiping clamp 503 and the fixed wiping clamp 502 together clamp the surface of the bar stock. As the bar stock is fed, the surface oxide scale, oil stains and debris are wiped away. The impurities wiped off fall into the impurity collection box 506 below. Step S5, Fixed Length Positioning: The cleaned bar continues to be conveyed to the cutting station, passing through the cutting groove 15 on the sliding knife holder 14 until the end of the bar abuts the feed end of the fixed length guide rod 10. The contact sensor triggers the fixed length positioning signal, and the extension length of the fixed length guide rod 10 is adjusted to adapt to different cutting lengths. Step S6, Clamping and Positioning: After receiving the fixed length positioning signal, the control box 7 controls the clamping cylinder to drive the upper and lower clamping blocks to firmly clamp and position the bar stock. Step S7, Cutting execution: The control box 7 controls the drive cylinder 20 to push the sliding tool holder 14 downward along the fixed frame 13, and the carbide shearing blade in the cutting groove 15 completes the cutting of the bar material as the tool holder moves downward; Step S8, Tool Post Reset: After cutting is completed, the drive cylinder 20 is unloaded, and the elastic force of the reset spring 18 pushes the sliding tool post 14 to move upward and reset. The dustproof cloth 19 moves up and down synchronously with the tool post to prevent debris from entering the gap of the reset spring 18. At the same time, the clamping cylinder is released to release the clamp. Step S9, billet collection: The cut billet falls under the action of gravity, first contacting the inclined feeding guide plate 802, and then slowly slides down the inclined surface of the guide plate into the collection trough 801 for centralized storage. Step S10, Cyclic execution: Repeat steps S5 to S9 to achieve continuous automatic length setting, clamping, cutting, resetting and billet collection cycle operation of bar stock.

[0040] The working process of this application is as follows: During operation, the bar stock enters the system from the feeding end and first passes through the feeding guide wheel group 3 on the feeding mounting seat 2. Multiple groups of guide wheels with arc-shaped grooves form a horizontal feeding channel, which radially limits and initially guides the bar stock, ensuring that the bar stock smoothly enters the subsequent working position along the set axis. Then, the bar stock enters the straightening frame 4, where multiple groups of straightening rollers continuously roll and straighten the bar stock to eliminate bending deformation. The guiding mechanism 6 can drive the adjusting screw 605 to rise and fall by rotating the adjusting handwheel 606, which drives the lifting slider 602 to move up and down along the adjusting groove 601, adjusting the distance between the upper guide roller 603 and the lower guide roller 607 to adapt to bar stock of different diameters, while further constraining the conveying posture and ensuring the straightness of the conveying.

[0041] After straightening, the bar stock enters the wiping mechanism 5. The fixed wiping clamp 502 and the lower wiping clamp 503 are tightly attached to the surface of the bar stock under the elastic force of the clamping spring 504. The bar stock is conveyed and wiped to remove the surface oxide scale, oil stains and debris. The impurities wiped off fall into the collection box 506 below and can be pulled out for cleaning. The cleaned bar stock continues to be conveyed to the cutting station, passes through the cutting groove 15 on the sliding knife holder 14, until the end of the bar stock abuts the feed end of the length guide rod 10 to complete the length setting. The length guide rod 10 can be adjusted to extend to meet the cutting requirements of different lengths of billets.

[0042] After the length is set, the programmable logic controller in the control box 7 issues a command to start the hydraulic cylinder 20, which pushes the sliding knife holder 14 downward along the fixed rod 16. The cutter in the cutting groove 15 moves downward with the knife holder to complete the cutting of the bar stock. After the cutting is completed, the hydraulic cylinder 20 is unloaded, and the elastic force of the return spring 18 pushes the sliding knife holder 14 upward to reset. The dustproof cloth 19 extends and retracts with the knife holder to prevent debris from entering the spring gap. The cut billet falls to the feeding guide plate 802 and slides into the collection trough 801 along the inclined guide plate to complete the collection. The system cyclically performs conveying, length setting, and cutting actions to realize continuous automatic operation of bar stock. The above is the working principle of the continuous cutting and conveying system and method for bar stock of a freight car universal joint cross shaft.

Claims

1. A continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car, comprising a main frame (1), a feeding mounting base (2), and a guiding mechanism (6), characterized in that: The main frame (1) is sequentially fixed with a feeding mounting base (2), a straightening frame (4), a guiding mechanism (6), and a wiping mechanism (5) along the bar stock conveying direction. The feeding mounting base (2) is provided with multiple feeding guide wheel sets (3) for preliminary guiding and limiting of the bar stock. The straightening frame (4) is arranged with multiple straightening rollers. The straightening frame (4) is equipped with a servo continuous feeding mechanism. The discharge end of the main frame (1) is fixedly connected with a cutting machine base (8). The cutting machine base (8) is provided with a fixed length bracket (9), a movable slide (11), and a drive cylinder (20). The movable slide (11) is connected to the wire. The guide rail is slidably installed on the cutting machine base (8). A fixed length guide rod (10) is horizontally inserted on the fixed length bracket (9). A sliding knife holder (14) is assembled on one side of the movable slide (11). A cutting groove (15) for the bar material to pass through is opened on the sliding knife holder (14). A cutting knife is installed in the cutting groove (15). The cutting knife is a carbide shearing knife. A bar material clamping and positioning structure is also provided on the cutting machine base (8). The bar material clamping and positioning structure includes an upper clamping block, a lower clamping block and a clamping cylinder. A cutting area protective cover is provided around the cutting machine base (8). A control box (7) is provided on one side of the main frame (1).

2. The continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car according to claim 1, characterized in that: The wiping mechanism (5) includes a wiping support (501), a square groove is provided near the top of the wiping support (501), and a fixed wiping clamp (502) is fixedly connected to the top of the square groove. A lower wiping clamp (503) is slidably connected to the bottom wall of the square groove. A clamping spring (504) is connected to the bottom of the lower wiping clamp (503). A spring guide post (505) is sleeved inside the clamping spring (504). A collection box (506) is pulled out on one side of the bottom of the wiping support (501). A handle (507) is fixedly connected to the side of the collection box (506). The fixed wiping clamp (502) and the lower wiping clamp (503) constitute a spring adaptive pressure wiping structure.

3. The continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car according to claim 1, characterized in that: The guiding mechanism (6) includes multiple adjusting slots (601) opened on the top of the straightening frame (4). A lifting slider (602) is slidably assembled in the adjusting slot (601). Limiting guide strips are provided on both sides of the lifting slider (602). An upper guide roller (603) is rotatably installed on one side of the lifting slider (602). A pressing beam (604) is fixed on the top of the adjusting slot (601). An adjusting screw (605) is vertically inserted on the pressing beam (604). An adjusting handwheel (606) is fixed to the top of the adjusting screw (605). A lower guide roller (607) is rotatably installed on the lower part of the straightening frame (4).

4. The continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car according to claim 1, characterized in that: The movable slide (11) is fixedly connected to one side of the mounting plate (12), and the mounting plate (12) is fixedly connected to the side wall of the mounting frame (13). The sliding tool holder (14) can slide up and down in the middle of the fixed frame (13). The driving cylinder (20) is fixedly installed on the top of the fixed frame (13). The output end of the driving cylinder (20) extends downward and is fixedly connected to the top of the sliding tool holder (14). Vertical guide rails are symmetrically arranged on both sides of the fixed frame (13).

5. A continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car according to claim 1, characterized in that: The length-fixed bracket (9) is vertically fixed to the top of the cutting machine base (8). The length-fixed guide rod (10) is inserted through the middle of the length-fixed bracket (9). The length-fixed guide rod (10) is coaxially arranged with the bar material conveying direction. The feed end of the length-fixed guide rod (10) is arranged corresponding to the discharge side of the cutting groove (15) to abut against the end of the bar material to achieve length-fixed measurement. A contact sensing sensor is embedded at the end of the length-fixed guide rod (10).

6. The continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car according to claim 1, characterized in that: The feeding guide wheel group (3) includes multiple sets of vertically and horizontally arranged guide wheels. Each set of guide wheels has an arc-shaped groove on its wheel surface that matches the outer diameter of the bar stock. Multiple sets of guide wheels surround to form a horizontal feeding channel. The axis of the feeding channel is coaxially set with the straightening channel of the straightening frame (4). The feeding guide wheel group (3) is provided with an anti-deviation limiting stop on its outer side.

7. A continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car according to claim 4, characterized in that: A pair of fixing rods (16) are fixedly connected to the bottom of the fixing frame (13). The pair of fixing rods (16) are vertically inserted through the bottom ends of the sliding tool holder (14). The bottom ends of the fixing rods (16) are fixedly connected to a limiting base plate (17). A reset spring (18) is sleeved on the top of the limiting base plate (17). The two ends of the reset spring (18) abut against the bottom surface of the sliding tool holder (14) and the top surface of the limiting base plate (17), respectively. A dustproof cloth (19) is provided on the surface of the reset spring (18). The top end of the dustproof cloth (19) is connected to the bottom surface of the sliding tool holder (14), and the bottom end is connected to the top surface of the limiting base plate (17).

8. A continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car according to claim 1, characterized in that: The inner side of the cutting machine base (8) is provided with a material collection trough (801), and a material discharge guide plate (802) is provided on the feeding side of the material collection trough (801). The material discharge guide plate (802) is inclined downward from the feeding side to the discharging side, and the material discharge guide plate (802) is located directly below the cutting groove (15). The surface of the material discharge guide plate (802) is provided with a wear-resistant buffer pad layer, and the material collection trough (801) is provided with an external chip removal structure.

9. A continuous cutting and conveying system for universal joint cross shaft bar stock of a freight car according to claim 7, characterized in that: The control box (7) is provided with an operation panel (701) on the top. A dust cover (702) is hinged above the operation panel (701). Multiple control buttons (703) are installed on the top surface of the control box (7). A programmable logic controller is integrated inside the control box (7). The programmable logic controller is electrically connected to the straightening drive mechanism and the drive cylinder (20).

10. A method for continuous cutting and conveying of universal joint cross shaft bar stock for freight cars, applied to the continuous automatic cutting and conveying system for universal joint cross shaft bar stock for freight cars as described in any one of claims 1-9, characterized in that: The method includes the following steps: Step S1, Feeding guidance: The bar stock enters the feeding mounting seat (2), and is radially limited and initially guided in multiple directions through the feeding channel formed by multiple sets of feeding guide wheels (3), so as to ensure that the bar stock enters the subsequent station smoothly along the set axis; Step S2, Roller Straightening: The bar stock enters the straightening frame (4) and is continuously rolled and straightened by multiple sets of straightening rollers to eliminate the bending deformation of the bar stock. At the same time, it serves the continuous feeding mechanism to realize the constant speed and quantitative continuous feeding of the bar stock. Step S3, Guiding Constraint: After straightening, the bar stock enters the guiding mechanism (6). By adjusting the distance between the upper guide roller (603) and the lower guide roller (607), it can adapt to bars of different diameters and form a two-way radial constraint on the bar stock to ensure the straightness of the bar stock conveying. Step S4, Surface wiping: The bar stock enters the wiping mechanism (5). The clamping spring (504) drives the wiping clamp (503) and the fixed wiping clamp (502) to clamp the surface of the bar stock together. As the bar stock is fed, the surface oxide scale, oil stains and debris are wiped away. The impurities wiped off fall into the impurity collection box (506) below. Step S5, Fixed length positioning: The cleaned bar continues to be conveyed to the cutting station, passing through the cutting groove (15) on the sliding knife holder (14) until the end of the bar abuts the feed end of the fixed length guide rod (10), the contact sensor triggers the fixed length positioning signal, and the extension length of the fixed length guide rod (10) is adjusted to adapt to different cutting lengths. Step S6, clamping and positioning: After receiving the fixed length positioning signal, the control box (7) controls the clamping cylinder to drive the upper clamping block and the lower clamping block to firmly clamp and position the bar. Step S7, Cutting execution: The control box (7) controls the drive cylinder (20) to push the sliding knife holder (14) downward along the fixed frame (13), and the carbide shearing knife in the cutting groove (15) completes the cutting of the bar material as the knife holder moves downward; Step S8, Tool Post Reset: After cutting is completed, the drive cylinder (20) is depressurized, and the elastic force of the reset spring (18) pushes the sliding tool post (14) to move upward and reset. The dust cloth (19) moves up and down synchronously with the tool post, blocking debris from entering the gap of the reset spring (18). At the same time, the clamping cylinder is released to release the clamp. Step S9, billet collection: The cut billet falls under the action of gravity, first contacting the inclined feeding guide plate (802), and then slowly slides down the inclined surface of the guide plate into the collection trough (801) for centralized storage; Step S10, Cyclic execution: Repeat steps S5 to S9 to achieve continuous automatic length setting, clamping, cutting, resetting and billet collection cycle operation of bar stock.

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