Automatic rod feeding device for a rod mill

Abstract

This utility model discloses an automatic rod feeding device for a rod mill. A bracket for storing steel rods is fixedly installed on the top side of the frame, and an arm is fixedly installed next to the bracket. The rod feeding arm is driven by a traveling motor and can extend out of the frame along the arm guide rail. Conveying rollers are spaced apart along the length direction at the top of the rod feeding arm, and movable rollers are spaced apart along the length direction on the upper part of the arm. A rod pulling mechanism is fixedly installed at the bottom of the bracket to pull the steel rods from the bracket to the movable rollers, and then transport them into the rod mill along the conveying rollers at the top of the rod feeding arm. This automatic rod feeding device is scientifically and rationally designed, easy to operate, and highly versatile. By rationally setting the movable rollers, rod feeding arm conveying rollers, rod pulling mechanism, and traveling device, and integrating system control, the production automation level of the rod mill rod feeding device is improved. It can quickly, stably, and continuously add steel rods, improve the accuracy of steel rod feeding, and improve the efficiency and safety of the rod feeding operation.

Description

Technical Field

[0001] This utility model belongs to the field of rod mill technology, specifically relating to an automatic rod feeding device for a rod mill. Background Technology

[0002] A rod mill is a type of mill in which steel rods are loaded as grinding media inside the cylinder. The material to be ground is continuously fed into the cylinder from the feeding section. The operation of the rod mill involves a motor driving the cylinder through a reduction gear. During the cylinder's rotation, the material and steel rods are subjected to friction and centrifugal force. The steel rods are lifted to a certain height by the cylinder's liner and then, due to gravity, fall and cascade. Under the action of centrifugal force and friction, the material is impacted and crushed by the moving steel rods. As the grinding and crushing capacity increases, the steel rods inside the cylinder gradually wear down, requiring replacement of the rods, removal of severely worn fine rods, and addition of new steel rods to ensure that the amount of steel rods loaded into the cylinder remains at a predetermined optimal value.

[0003] In existing technologies, the steel rods used as grinding media in rod mills are generally long and heavy. Manually replacing these rods is time-consuming, labor-intensive, and carries significant safety risks. While semi-mechanized methods, such as using forklifts or cranes to lift the rods and place them on rollers on the feeding platform, still require manual intervention to push them into the mill. This hinders automated feeding, conveying, and unloading, prevents continuous and stable feeding, increases labor intensity, lengthens the feeding time, and results in uneven rod placement, affecting grinding efficiency and posing safety risks. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, this utility model provides an automatic rod feeding device for rod mills, which includes a rod pulling mechanism, movable rollers, conveying rollers, a rod feeding arm, and a traveling device, etc., to solve the problems of inconvenient operation, poor versatility, and high labor intensity of existing rod feeding devices for rod mills, thereby improving the efficiency and safety of rod feeding operations.

[0005] The technical solution adopted by this utility model is as follows: an automatic rod feeding device for a rod mill, including a frame, a bracket for storing steel rods fixedly installed on the top side of the frame, a boom fixedly installed adjacent to the bracket, a guide rail fixedly installed at the bottom of the boom, at least two sets of boom wheel sets installed on the guide rail, any one set of boom wheel sets being connected to a travel motor, the boom wheel sets being fixedly installed at the bottom of the feeding arm, the feeding arm being driven by the travel motor and extending out of the frame along the boom guide rail; conveying rollers are spaced apart along the length direction at the top of the feeding arm, a sprocket is provided on one side of the conveying rollers, and the left end of the feeding arm... A drive motor is installed on the lower side of the arm, and a main sprocket is mounted on the output shaft of the drive motor. The main sprocket is connected to the sprockets on the side of the adjacent conveying idler rollers by a chain. The sprockets of the adjacent conveying idler rollers are connected and driven by a chain. Movable idler rollers are spaced apart along the length of the upper part of the arm. A rod pulling mechanism is fixedly installed at the lower part of the bracket to pull the steel rods from the bracket to the movable idler rollers, and then transport them to the rod mill along the conveying idler roller at the top of the rod arm. The left end of the rod arm is set as an inclined surface, and a pressure roller is fixedly installed at the top of the right end of the rod arm. A support device is fixedly installed at the bottom of the right end of the rod arm.

[0006] The frame is a cuboid frame structure welded from channel steel and angle steel. The bracket and boom on the upper part of the frame are arranged in parallel. The side of the bracket adjacent to the boom is inclined downward, and steel bars are stored on the bracket.

[0007] The movable idler includes an idler frame, which is fitted into the middle of the idler shaft. Both ends of the idler shaft are connected to one end of a connecting rod via bearings. A support seat is fixedly provided at the bottom of the movable end of the connecting rod, and the other end of the connecting rod is mounted on a support via a bearing. The support is fixedly installed on both sides of the top of the boom. The movable idler spans the top of the boom, and the distance between adjacent movable idlers is not greater than the length of the steel bar.

[0008] The rod pulling mechanism includes a rod pulling shaft. Both ends of the rod pulling shaft are mounted on the bracket near the boom side via brackets and bearings. At least two sets of pulling wheels are fixedly sleeved on the rod pulling shaft. An electro-hydraulic push rod is fixedly installed on the frame at the bottom of the bracket. The electro-hydraulic push rod is inclined upward. The extended end of the electro-hydraulic push rod is fixedly connected to the connecting rod at the bottom of the pulling wheel. An arc-shaped notch is opened on the outer edge of the pulling wheel. The top of the pulling wheel is slightly higher than the height of the bracket at the corresponding position. A transition plate is fixedly installed at intervals on the bracket at the same height as the pulling wheel. Baffles are also fixedly installed at intervals on the upper outer side of the movable idler roller on the boom.

[0009] The conveying roller includes a roller, which is mounted on a roller shaft. The two ends of the roller shaft are mounted on the side walls of the support arm via bearings. The roller surface is a V-shaped or U-shaped concave surface. The opening size of the concave surface of the roller is slightly larger than the diameter of the steel bar. The distance between adjacent conveying rollers is not greater than the length of the steel bar.

[0010] The center lines of the movable idler and the conveying idler on the extension arm are aligned and at the same horizontal height. A set of conveying idlers is densely arranged at the right end of the extension arm. A pressure roller is fixedly installed above the two sets of conveying idlers at the right end of the extension arm. The idler frame of the movable idler and the rollers of the conveying idler are wrapped with flexible rubber material to buffer the impact force of the steel rod.

[0011] The frame is equipped with a traveling device at its bottom. A geared motor is located in the middle of the bottom of one side of the frame, with drive wheels at both ends. Driven wheels are located at both ends of the bottom of the other side of the frame. The two output shafts of the geared motor are connected to the two drive wheels via universal couplings. The automatic bar-adding device moves along a track set on the ground via the traveling device to reach the required position and perform the bar-adding operation.

[0012] The support device includes an upper support rod and a lower support rod, which are connected by a thread and have an adjustable total length. A locking nut is provided at the connection point between the two rods. Three sets of support seats are fixedly installed at intervals on the same straight line at the bottom of the right end of the support arm. The lower part of the support seat has a through hole. A connecting plate is fixedly installed in the middle of the lower support rod. The connecting plate has a fixing hole. The front end of the upper support rod is also hinged to a support plate. The support plate has a through hole. The rear end of the lower support rod has a U-shaped groove. A rotating shaft is installed on the side wall of the U-shaped groove through a bushing. The rotating shaft extends out of the U-shaped groove and is equipped with a locking nut.

[0013] A boom positioning device is fixedly installed on the lower outer side of the right end of the frame. The two ends of the screw are fixedly installed on the positioning bracket. The slider is fitted on the screw. A limit switch is fixedly installed on the slider to limit the extension position of the boom along the boom track and prevent the boom from extending too far, which would cause it to tilt.

[0014] The control system includes an electrical control system for the walking motor, drive motor, geared motor and electro-hydraulic actuator, and also includes limit sensors for controlling the movement position of the rod-adding arm on the frame guide rail and the movement position of the rod-adding device frame along the ground track, all of which are electrically connected to the control box.

[0015] The left end of the adding arm is set as an inclined surface, and a pressure roller is fixedly installed at the top of the right end of the adding arm, while a support device is fixedly installed at the bottom of the right end of the adding arm. The purpose of this arrangement is that when the adding arm extends out of the frame along the guide rail, the idler frame and idler shaft of the movable idler fall onto the arm under their own weight, and the movable end of the connecting rod is supported on the arm by the support seat. The support seats and supports at both ends of the connecting rod are at the same height. At this time, the movable idler and the conveying idler are on the same horizontal plane, and the movable idler and the conveying idler jointly bear the steel bar pulled by the bar pulling mechanism. When the adding arm retracts into the frame along the guide rail, the inclined surface at the left end of the adding arm lifts up the idler frame and idler shaft of the movable idler in sequence, which facilitates the retraction of the adding arm. Due to the long length of the steel bars, conveyor rollers are densely installed at the right end of the bar-adding arm, and a pressure roller is fixedly installed at the top of the right end of the arm. This creates a space between the conveyor rollers and the pressure roller to accommodate the steel bars. Driven by the conveyor rollers, the steel bars enter the bar mill, preventing the tail of the bars from tilting upwards and ensuring their trajectory remains straight. This prevents accumulation, jamming, or slippage during the feeding process into the bar mill, thus maintaining a stable feeding speed. This design adapts to feeding bars of different lengths, improving the versatility and flexibility of the bar-adding device.

[0016] The beneficial effects of this utility model are as follows: The automatic bar feeding device is scientifically and rationally designed, easy to operate, and highly versatile. By rationally setting the movable idler rollers and bar feeding arm conveying idler rollers, bar pulling mechanism and walking device, and integrating system control, the production automation level of the bar mill bar feeding device is improved. It can quickly and stably feed and convey materials sequentially to continuously add steel bars, improve the accuracy of steel bar feeding, and improve the efficiency and safety of bar feeding operations. Attached Figure Description

[0017] Figure 1 This is a front view of the rod-adding device of this utility model; Figure 2 This is a schematic diagram of the left side of the rod-adding device of this utility model; Figure 3 This is a right-side structural schematic diagram of the rod-adding device of this utility model; Figure 4 This is a three-dimensional structural diagram of the rod-adding device of this utility model after the rod arm has been extended; Figure 5 This is a bottom view of the rod-adding device of this utility model after the rod arm has been extended; Figure 6 This is a schematic diagram of the structure of the rod arm support device of this utility model.

[0018] Markings in the diagram: 1. Frame; 2. Bracket; 3. Boom; 4. Adding arm; 5. Drive motor; 6. Main sprocket; 7. Sprocket; 8. Chain; 9. Rod pulling mechanism; 91. Support; 92. Electro-hydraulic actuator; 93. Connecting rod; 94. Pulling wheel; 95. Rod pulling shaft; 96. Transition plate; 97. Baffle; 10. Movable idler roller; 101. Support; 102. Connecting rod; 103. Idler roller shaft; 104. Idler roller frame; 105. Support base ; 11. Boom positioning device; 111. Positioning support; 112. Screw; 113. Slider; 12. Travel motor; 13. Boom wheel assembly; 14. Conveyor roller; 15. Support device; 151. Upper support rod; 152. Lower support rod; 153. Rotating shaft; 16. Pressure roller; 17. Gear motor; 18. Universal coupling; 19. Drive wheel; 20. Driven wheel; 21. Steel bar; 22. Control box. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-6 As shown, an automatic rod feeding device for a rod mill includes a frame 1. A bracket 2 for storing steel rods is fixedly installed on the top side of one side of the frame 1. An arm 3 is fixedly installed adjacent to the bracket 2. A guide rail is fixedly installed on the lower part of the arm 3. At least two sets of arm wheel sets 13 are installed on the guide rail. Any set of arm wheel sets 13 is connected to a travel motor 12. The arm wheel sets 13 are fixedly installed at the bottom of the rod feeding arm 4. The rod feeding arm 4 is driven by the travel motor 12 and can extend out of the frame 1 along the guide rail of the arm 3. Conveying rollers 14 are spaced apart along the length direction on the top of the rod feeding arm 4. A sprocket 7 is provided on one side of the conveying roller 14. A drive motor is provided on the lower side of the left end of the rod feeding arm 4. 5. A main sprocket 6 is installed on the output shaft of the drive motor 5. The main sprocket 6 is connected to the sprocket 7 on the side of the adjacent conveying roller 14 by a chain 8. The sprockets 7 of the adjacent conveying rollers 14 are connected and driven by the chain 8. Movable rollers 10 are spaced apart along the length of the upper part of the boom 3. A rod pulling mechanism 9 is fixedly installed at the lower part of the bracket 2 to pull the steel rod 21 from the bracket 2 to the movable roller 10, and then transport it to the rod mill along the conveying roller 14 at the top of the rod adding arm 4. The left end of the rod adding arm 4 is set as an inclined surface. A pressure roller 16 is fixedly installed at the top of the right end of the rod adding arm 4. A support device 15 is fixedly installed at the bottom of the right end of the rod adding arm 4.

[0021] The frame 1 is a cuboid frame structure welded from channel steel and angle steel. The bracket 2 and boom 3 on the upper part of the frame 1 are arranged parallel to each other. The side of the bracket 2 adjacent to the boom 3 is inclined downwards. Steel bars 21 are stored on the bracket 2, and the placement direction of the steel bars 21 on the bracket 2 is consistent with the running direction of the steel bars 21 on the movable idler roller 10 on the boom 3 and the conveying idler roller 14 on the bar-adding arm 4. This ensures the continuity of the feeding process, helps reduce downtime and waiting time in the production process, reduces manual intervention in the bar-adding process, and effectively reduces safety risks in production.

[0022] The movable idler 10 includes an idler frame 104, which is fitted onto the middle of the idler shaft 103. Both ends of the idler shaft 103 are connected to the movable ends of the connecting rod 102 via bearings. A support seat 105 is fixedly provided at the bottom of the movable end of the connecting rod 102. The other end of the connecting rod 102 is mounted on a support 101 via a bearing. The support 101 is fixedly mounted on both sides of the top of the boom 3. The movable idler 10 spans the top of the boom 3. The distance between adjacent movable idlers 10 is not greater than the length of the steel rod 21. The movable idler 10 can be raised within the range of motion of the connecting rod 102 around the support 101.

[0023] The rod-pulling mechanism 9 includes a rod-pulling shaft 95. Both ends of the rod-pulling shaft 95 are mounted on the bracket 2 near the arm 3 via brackets 91 and bearings. At least two sets of pulling wheels 94 are fixedly fitted onto the rod-pulling shaft 95. An electro-hydraulic push rod 92 is fixedly mounted on the frame 1 at the bottom of the bracket 2. The electro-hydraulic push rod 92 is inclined upwards, and its extended end is fixedly connected to a connecting rod 93 at the bottom of the pulling wheel 94. An arc-shaped notch is provided on the outer edge of the pulling wheel 94. The top of the pulling wheel 94 is slightly higher than the corresponding height of the bracket 2. The rod-adding device is stored on the bracket 2. The steel rod 21 is blocked by the puller 94 and will not fall; the electro-hydraulic actuator 92 drives the puller 94 to rotate within a certain range. When a steel rod 21 enters the arc-shaped notch on the puller 94, it continues to drive the puller 94 and the puller shaft 95 to rotate. The bracket 2 is fixedly provided with a transition plate 96 at the same height as the puller 94. The steel rod 21 is pulled onto the movable roller 10 through the transition plate 96. The arm 3 is also fixedly provided with baffles 97 at intervals on the upper outer side of the movable roller 10 to prevent the steel rod 21 from falling off the movable roller 10 during the plucking process.

[0024] The conveying roller 14 includes a roller, which is mounted on a roller shaft. The two ends of the roller shaft are mounted on the side walls of the support arm 4 through bearings. The roller surface is a V-shaped or U-shaped concave surface. The opening size of the concave surface of the roller is slightly larger than the diameter of the steel rod 21. The distance between adjacent conveying rollers 14 is not greater than the length of the steel rod 21.

[0025] The center lines of the movable idler 10 and the conveying idler 14 on the reinforcing arm 4 are aligned and at the same horizontal height. A set of conveying idlers 14 is densely arranged at the right end of the reinforcing arm 4. A pressure roller 16 is fixedly arranged above the two sets of conveying idlers 14 at the right end of the reinforcing arm 4. The idler frame 104 of the movable idler 10 and the rollers of the conveying idler 14 are wrapped with flexible rubber material to buffer the impact force of the steel rod 21.

[0026] The frame 1 is equipped with a traveling device at its bottom. A reduction motor 17 is located at the center of the bottom of one side of the frame 1. Driven wheels 19 are located at both ends of the bottom of the frame 1 on the same side as the reduction motor 17. Driven wheels 20 are located at both ends of the bottom of the other side of the frame 1. The two output shafts of the reduction motor 17 are connected to the two drive wheels 19 via universal couplings 18. The automatic bar-adding device moves along a track set on the ground via the traveling device to reach the required position and perform the bar-adding operation.

[0027] The support device 15 includes an upper support rod 151 and a lower support rod 152, which are connected by a thread and have an adjustable total length. A locking nut is provided at the connection between the two. Three sets of support seats are fixedly installed at intervals on the same straight line at the bottom of the right end of the extension arm 4. The lower part of the support seat has a through hole. A connecting plate is fixedly installed in the middle of the lower support rod 152. The connecting plate has a fixing hole. The front end of the upper support rod 151 is also hinged to a support plate. The support plate has a through hole. The rear end of the lower support rod 152 has a U-shaped groove. A rotating shaft is provided on the side wall of the U-shaped groove through a bushing. The rotating shaft extends out of the U-shaped groove and is provided with a locking nut.

[0028] A boom positioning device 11 is fixedly installed on the lower outer side of the right end of the frame. The two ends of the screw 112 are fixedly installed on the positioning bracket 111. The slider 113 is fitted on the screw 112. A limit switch is fixedly installed on the slider 113 to limit the extension position of the extension arm 4 along the boom 3 track and prevent the extension arm 4 from extending too far, which would cause it to tilt.

[0029] The control system includes an electrical control system for the walking motor 12, drive motor 5, reduction motor 17 and electro-hydraulic push rod 92, and also includes limit sensors for controlling the movement position of the rod-adding arm 4 on the guide rail of the frame 1 and the movement position of the rod-adding device frame 1 along the ground track, all of which are electrically connected to the control box 22.

[0030] The working process of this utility model is as follows: the automatic rod feeding device can drive the driving wheel 19 and driven wheel 20 at the bottom of the frame 1 to run along the ground track through the reduction motor 17 and universal coupling 18, and run to the appropriate position of the rod mill to be fed and brake. The rod feeding device is positioned directly in front of the rod mill discharge port. Power is turned on, and the traveling motor 12 drives the rod feeding arm 4 along the guide rail of the boom 3 via the boom wheel assembly 13. The rod feeding arm 4 extends out of the frame 1 and connects to the rod mill discharge port. The support device 15 on the lower right side of the rod feeding arm 4 is fixedly supported on the outer wall of the rod mill discharge port. The electro-hydraulic push rod 92 of the rod pulling mechanism 9 is activated, pulling the steel rods 21 on the bracket 2 one by one onto the movable roller 10. The drive motor 5 drives the conveying roller 14 on the rod feeding arm 4 to rotate via the main sprocket 6, sprocket 7, and chain 8. The steel rods 21 are conveyed one by one into the rod mill via the movable roller 10 and conveying roller 14. The pressure roller 16 at the end of the rod feeding arm 4 ensures that the tail of the steel rod 21 does not curl upwards, maintaining the running trajectory of the steel rod 21 without deviation, thus ensuring... Stable rod lowering speed; when the support device 15 is not in use, the connecting plate of the lower support rod 152 is fixed in the left support bracket by bolts, and the front end of the upper support rod 151 is hinged in the middle support bracket by a pin. The support device 15 is obliquely set at the lower part of the rod arm 4, which does not affect the extension and retraction of the rod arm 4 and its entry into the rod mill feeding port; when the support device 15 is in use, the fixing bolts between the connecting plate of the lower support rod 152 and the left support bracket are loosened, and the support plate of the upper support rod 151 is fixed in the right support bracket by bolts. The upper support rod 151 and the lower support rod 152 form a downward vertical state, and the length can be adjusted by the thread between the upper support rod 151 and the lower support rod 152. It is supported at the rod mill discharge port to reduce the stress and bending deformation borne by the rod arm 4. The automatic rod feeding device is scientifically and rationally designed and easy to operate. Through the walking device, it can be used with different rod mills for rod feeding operations, and has high versatility. The device is reasonably set with movable roller 10, rod feeding arm 4, conveying roller 14 and rod pulling mechanism 9, and integrated system control, which improves the production automation level of the rod mill rod feeding device. It can quickly and stably feed and convey materials in sequence to continuously add steel rods 21, thereby improving the efficiency and safety of the rod feeding operation.

[0031] The parts of this invention not described in detail are prior art. Besides the embodiments described above, this utility model may have other implementations, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. An automatic rod feeding device for a rod mill, characterized in that: The system includes a frame, with a bracket for storing steel bars fixedly installed on the top side of one side of the frame. An arm is fixedly installed adjacent to the bracket, and a guide rail is fixedly installed at the bottom of the arm. At least two sets of arm wheel sets are installed on the guide rail, and any one set of arm wheel sets is connected to a travel motor. The arm wheel sets are fixedly installed at the bottom of the arm, which is driven by the travel motor to extend out of the frame along the arm guide rail. Conveying rollers are spaced along the length of the top of the arm, and a sprocket is located on one side of each conveying roller. A drive motor is located on the lower left side of the arm. The output shaft is equipped with a main sprocket, which is connected to the sprockets on the side of the adjacent conveyor rollers by a chain. The sprockets of the adjacent conveyor rollers are driven by a chain connection. Movable rollers are spaced apart along the length of the upper part of the boom. A rod-pulling mechanism is fixedly installed at the lower part of the bracket to pull the steel rods from the bracket onto the movable rollers, and then transport them to the rod mill along the conveyor rollers at the top of the rod-adding arm. The left end of the rod-adding arm is set as an inclined surface, and a pressure roller is fixedly installed at the top of the right end of the rod-adding arm. A support device is fixedly installed at the bottom of the right end of the rod-adding arm.

2. The automatic rod feeding device for a rod mill according to claim 1, characterized in that: The frame is a rectangular frame structure welded from channel steel and angle steel. The bracket and boom on the upper part of the frame are arranged in parallel. The side of the bracket adjacent to the boom is inclined downward and the steel bars are stored on the bracket.

3. The automatic rod feeding device for a rod mill according to claim 1, characterized in that: The movable idler includes an idler frame, which is fitted into the middle of the idler shaft. Both ends of the idler shaft are connected to one end of a connecting rod via bearings. A support seat is fixedly provided at the bottom of the movable end of the connecting rod, and the other end of the connecting rod is mounted on a support via a bearing. The support is fixedly installed on both sides of the top of the boom. The movable idler spans the top of the boom, and the distance between adjacent movable idlers is not greater than the length of the steel bar.

4. The automatic rod feeding device for a rod mill according to claim 1, characterized in that: The rod pulling mechanism includes a rod pulling shaft. Both ends of the rod pulling shaft are mounted on the bracket near the boom side via brackets and bearings. At least two sets of pulling wheels are fixedly sleeved on the rod pulling shaft. An electro-hydraulic push rod is fixedly installed on the frame at the bottom of the bracket. The electro-hydraulic push rod is inclined upward. The extended end of the electro-hydraulic push rod is fixedly connected to the connecting rod at the bottom of the pulling wheel. An arc-shaped notch is opened on the outer edge of the pulling wheel. The top of the pulling wheel is slightly higher than the height of the bracket at the corresponding position. Transition plates are fixedly installed at intervals on the bracket at the same height as the pulling wheel. Baffles are also fixedly installed at intervals on the upper outer side of the movable idler roller on the boom.

5. An automatic rod feeding device for a rod mill according to claim 1, characterized in that: The conveying idler includes a roller, which is mounted on a roller shaft. The two ends of the roller shaft are mounted on the side walls of the support arm via bearings. The roller surface is a V-shaped or U-shaped concave surface. The opening size of the concave surface of the roller is slightly larger than the diameter of the steel bar. The distance between adjacent conveying idlers is not greater than the length of the steel bar.

6. The automatic rod feeding device for a rod mill according to claim 1, characterized in that: The center lines of the movable idler and the conveying idler on the extension arm are aligned and at the same horizontal height. A set of conveying idlers is densely installed at the right end of the extension arm. A pressure roller is fixedly installed above the two sets of conveying idlers at the right end of the extension arm. The idler frame of the movable idler and the rollers of the conveying idler are wrapped with flexible rubber material.

7. An automatic rod feeding device for a rod mill according to claim 1, characterized in that: The frame is equipped with a traveling device at the bottom. A geared motor is located in the middle of the bottom of one side of the frame, with driving wheels at both ends. Driven wheels are located at both ends of the bottom of the other side of the frame. The two output shafts of the geared motor are connected to the two driving wheels through universal couplings.

8. An automatic rod feeding device for a rod mill according to claim 1, characterized in that: The support device includes an upper support rod and a lower support rod, which are connected by a thread and have an adjustable total length. A locking nut is provided at the connection point between the two rods. Three sets of support seats are fixedly installed at intervals on the same straight line at the bottom of the right end of the support arm. The lower part of the support seat has a through hole. A connecting plate is fixedly installed in the middle of the lower support rod. The connecting plate has a fixing hole. A support plate is also hinged to the front end of the upper support rod. The support plate has a through hole. The rear end of the lower support rod has a U-shaped groove. A rotating shaft is installed on the side wall of the U-shaped groove through a bushing. The rotating shaft extends out of the U-shaped groove and is equipped with a locking nut.

9. An automatic rod feeding device for a rod mill according to claim 1, characterized in that: A boom positioning device is fixedly installed on the lower outer side of the right end of the frame. The two ends of the screw are fixedly installed on the positioning bracket. The slider is fitted on the screw, and a limit switch is fixedly installed on the slider.

10. An automatic rod feeding device for a rod mill according to claim 1, characterized in that: The control system includes an electrical control system for the walking motor, drive motor, geared motor and electro-hydraulic actuator, as well as limit sensors for controlling the movement position of the bar-adding arm on the frame guide rail and the movement position of the bar-adding device frame along the ground track, all of which are electrically connected to the control box.

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