Feeding mechanism and method for bar positioning

Abstract

The invention discloses a feeding mechanism for bar positioning, which comprises a main body frame, the main body frame comprises a base, a feeding lifting roller frame is arranged on the base, and a feeding secondary frame body is arranged on the feeding lifting roller frame; the feeding main transmission system is installed on the feeding lifting roller frame and used for providing feeding power, the feeding positioning system is fixed to the side of the feeding secondary frame body and used for assisting bar positioning, the feeding end driven chain wheel set is installed at the end of the feeding secondary frame body, the feeding lifting system is located at the bottom of the feeding lifting roller frame, and after bars are transversely in place, the feeding end driven chain wheel set drives the feeding lifting roller frame to rotate. And the bars are lifted up and then fed. The invention further discloses a feeding method for bar positioning. When a driven chain wheel set and a chain at the feeding end drag bars to move from left to right and reach the positions of a feeding roller set and a discharging roller set of the feeding lifting system, an air cylinder on the lower side of the feeding positioning system pushes a positioning plate to rotate around the axis of a connecting shaft, the bars are limited within a certain range from right to left, and multiple bars are prevented from being in place at a time.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of step furnace heat treatment equipment, and particularly relates to a feeding mechanism for rod positioning and a feeding method for rod positioning. BACKGROUND

[0002] The step furnace has the advantages of less oxidation loss, high material utilization, flexible production capacity adjustment, adaptation to multiple working conditions, mature automatic control, and reduction of manual intervention, and is widely used in the heat treatment of various rods. Due to high furnace door temperature, heavy rod weight and other factors, the step furnace usually uses a feeder or a feeding tool to load the rod.

[0003] At present, most existing feeding devices adopt a roller feeding structure. The original design of this structure is to adapt to the rod conveying scene with a single specification or small specification difference. However, in actual production, when the specifications of the rods to be conveyed are large, the limitations of this structure will be highlighted. For small-sized rods, it is easy for multiple rods to be fed at a time during the feeding process. Once multiple rods are simultaneously fed into the step furnace with the roller, it will cause problems such as material stacking, uneven heating in the furnace, and safety hazards such as material jamming and equipment failure caused by limited space in the furnace and material extrusion. When multiple rods are detected to be in place at the same time, the machine must be stopped to remove the mistakenly entered rods, and then the feeding process is re-executed, which greatly increases the invalid working hours, reduces the continuous operation efficiency of the whole production line, and also increases the start-stop loss of the equipment and the cost of manual inspection. SUMMARY

[0004] The purpose of the present application is to provide a feeding mechanism for rod positioning, which solves the problem of multiple rods entering the step furnace at a time in the prior art when the rod specifications are large.

[0005] Another purpose of the present application is to provide a feeding method for rod positioning.

[0006] The technical solution adopted by the present application is a feeding mechanism for rod positioning, which comprises a main frame, a feeding main transmission system, a feeding positioning system, a feeding lifting system and a feeding end passive sprocket set arranged on the main frame. The main frame comprises a base, a feeding lifting roller frame and a feeding secondary frame body. The feeding lifting roller frame is arranged on the base, and the feeding secondary frame body is arranged on the feeding lifting roller frame. The feeding main transmission system is installed on the feeding lifting roller frame to provide power. The feeding positioning system is fixed to the side of the feeding secondary frame body to assist in positioning the rod. The feeding end passive sprocket set is installed at the end of the feeding secondary frame body. The feeding lifting system is located at the bottom of the feeding lifting roller frame and lifts the rod before feeding.

[0007] The present application also has the following characteristics: The base side is provided with a motor mounting plate, and the base side is also provided with elevator mounting plates at both ends. The feeding lifting roller frame comprises a feeding frame body provided on the base, a plurality of H-shaped supports are provided side by side on the feeding frame body, two first mounting seats are provided at the top of the H-shaped supports, and a second mounting seat is provided between every two H-shaped supports; a speed reducer mounting plate is further provided on one side of the feeding frame body; two first mounting plates and one second mounting plate are provided on the side of the feeding frame body; and mounting holes are provided at both ends of the feeding frame body. The feeding secondary frame body comprises a frame plate main body provided on one side of the H-shaped support, the end portions of a plurality of frame plate main bodies are connected through a baffle, and the side of the frame plate main body is connected with the side of the H-shaped support; two clamping plates are provided at the end portion of the frame plate main body, and chain wheel set mounting holes are provided on the two clamping plates.

[0008] The feeding main transmission system comprises a motor, a speed reducer, a motor chain wheel, an upper and lower feeding driving roller assembly, an upper and lower feeding roller way extension assembly, an upper and lower feeding roller group, a first transmission deflection roller assembly, a second transmission deflection roller assembly, a third transmission deflection roller assembly and a fourth transmission deflection roller assembly. The motor output shaft is connected with the speed reducer, the speed reducer output shaft is connected with the motor chain wheel, and the motor, the speed reducer and the motor chain wheel are installed on the speed reducer mounting plate of the feeding lifting roller frame; the upper and lower feeding driving roller assembly is arranged on the first mounting seat at the front end; and the upper and lower feeding roller group is arranged on the remaining first mounting seats, and the upper and lower feeding roller way extension assembly is fixed to the front end of the upper and lower feeding driving roller assembly. The upper and lower feeding driving roller assembly comprises a double chain wheel, a third belt stand type bearing, a driving roller, a first single chain wheel and a first chain wheel pressing plate; the two ends of the driving roller are connected with the third belt stand type bearings, the third belt stand type bearings are connected with the first mounting seat, and the double chain wheel and the first single chain wheel are sleeved on the driving roller; the side end faces of the double chain wheel and the first single chain wheel are provided with the first chain wheel pressing plate, and the motor chain wheel and the inner teeth of the double chain wheel are connected through a chain. The upper and lower feeding roller way extension assembly comprises a second single chain wheel, a fourth belt stand type bearing, a first upper and lower feeding roller, a second chain wheel pressing plate and a roller way extension frame; the two ends of the roller way extension frame are fixed with the fourth belt stand type bearings, and the first upper and lower feeding roller is assembled on the roller way extension frame through the two fourth belt stand type bearings; the first upper and lower feeding roller is provided with the second single chain wheel at one end portion, the second single chain wheel and the outer teeth of the double chain wheel are connected through a chain, and the second chain wheel pressing plate is attached to the side end face of the second single chain wheel away from the first upper and lower feeding roller body. The upper and lower feeding roller group comprises a fifth vertical bearing, a second upper and lower feeding roller, a third single sprocket, and a third sprocket pressing plate. The two fifth vertical bearings are respectively connected with the two ends of the second upper and lower feeding roller, the fifth vertical bearing is connected with the first mounting seat, one end of the second upper and lower feeding roller is connected with the third single sprocket, the third single sprocket is connected with the first single sprocket through a chain.

[0009] The first transmission deflection roller assembly comprises a first deflection roller shaft, a first deflection sprocket, a first bearing, and a fourth sprocket pressing plate. The first bearing is sleeved on the first deflection roller shaft, the first bearing is arranged on the second mounting seat, the first deflection sprocket is sleeved on the first deflection roller shaft, and the fourth sprocket pressing plate is connected to the end face of the first deflection roller shaft. The two groups of second transmission deflection roller assemblies are respectively installed in the mounting holes at the front and rear positions of the bottom beam of the feeding lifting roller frame. The second transmission deflection roller assembly comprises a second deflection roller shaft, a second deflection sprocket, a second bearing, and a fifth sprocket pressing plate. The second bearing is sleeved on the second deflection roller shaft, the second deflection sprocket is sleeved on the second deflection roller shaft, and the fifth sprocket pressing plate is fastened to the end face of the second deflection roller shaft. The two groups of third transmission deflection roller assemblies are respectively installed on the main plates at the bottom of the feeding lifting roller frame. The third transmission deflection roller assembly comprises a first mounting plate, a third deflection roller shaft, a third deflection sprocket, a third bearing, and a sixth sprocket pressing plate. The roller shaft of the third deflection roller shaft penetrates through the shaft hole in the first mounting plate, the third bearing is sleeved on the third deflection roller shaft, the third deflection sprocket is sleeved on the end portion of the third deflection roller shaft, and the sixth sprocket pressing plate is arranged on the end face of the third deflection roller shaft. The fourth transmission deflection roller assembly is installed on the long plate at the bottom of the feeding lifting roller frame. The fourth transmission deflection roller assembly comprises a second mounting plate, a fourth deflection roller shaft, a fourth deflection sprocket, a fourth bearing, and a seventh sprocket pressing plate. The fourth deflection roller shaft penetrates through the corresponding shaft hole in the second mounting plate, the fourth bearing is sleeved on the fourth deflection roller shaft, the fourth deflection sprocket is sleeved on the end portion of the fourth deflection roller shaft, and the seventh sprocket pressing plate is connected to the end face of the fourth deflection roller shaft through a fastener. The first single sprocket of the upper and lower feeding driving roller assembly, the third single sprocket of the upper and lower feeding roller group, the first deflection sprocket of the first transmission deflection roller assembly, the second deflection sprocket of the second transmission deflection roller assembly, the third deflection sprocket of the third transmission deflection roller assembly, and the fourth deflection sprocket of the fourth transmission deflection roller assembly are connected and driven through a chain.

[0010] The first upper and lower feeding roller and the second upper and lower feeding roller are conical and arranged in a row.

[0011] The feeding positioning system comprises a single ear ring mounting plate, a single ear ring, a cylinder, a joint, a first belt vertical seat bearing, a bearing seat mounting plate, a positioning plate and a connecting shaft; a plurality of positioning plates are sleeved on the connecting shaft, the positioning plates are fixed with the connecting shaft, three end portions of the positioning plates are further provided with bearing mounting plates, the bearing mounting plates are arranged on the side portion of the second stage frame body, the single ear ring mounting plate is fixed on the rear side of the base, the single ear ring is fixed on the side portion of the single ear ring mounting plate, the tail portion of the cylinder is connected with the single ear ring, and the telescopic portion is connected with the middle portion of one of the positioning plates through the joint and is used to drive the retracting and releasing action of the positioning plate.

[0012] The feeding lifting system comprises lifting roller frame guide columns, a lifting motor, screw elevators, linear bearings, a lifting screw nut seat, lifting seat guide column pressing plates, a roller lifting transmission shaft, a second belt vertical seat bearing and a shaft coupling; the lifting motor is fixedly installed on the lower side of the motor mounting plate of the base, two groups of screw elevators are fixedly installed at the lifting machine mounting plate positions, the lifting roller frame guide columns pass through the guide column holes from bottom to top and are connected with the feeding lifting roller frame; the lifting motor is connected with the two groups of screw elevators through the shaft coupling and the roller lifting transmission shaft; the linear bearings are assembled in the guide column holes of the base, the lifting roller frame guide columns pass through the linear bearings, one end of the lifting screw nut seat is connected with the screw rod output end of the screw elevator, and the other end is connected with the feeding lifting roller frame. The feeding end passive sprocket set comprises a sprocket shaft pressing plate, a sprocket shaft, a spacer sleeve, a fifth bearing, a passive sprocket and a hole elastic retainer; seven groups of feeding end passive sprocket sets are installed at the sprocket set mounting hole positions at the end portion of the second stage frame body; the sprocket shaft passes through the sprocket set mounting hole, the fifth bearing is assembled on the sprocket shaft and cooperates with the inner hole of the passive sprocket, the spacer sleeve is sleeved on the sprocket shaft, the hole elastic retainer is clamped into the inner hole of the passive sprocket, and the sprocket shaft pressing plate is fixed on the end face of the sprocket shaft through fasteners.

[0013] Another technical solution adopted by the present application is a feeding method for positioning of a rod, specifically: The feeding end passive sprocket set rotates to drive the rod on the chain to move horizontally from left to right, when reaching the side portion of the feeding and discharging roller set, the feeding positioning system is used for auxiliary positioning, the feeding lifting system lifts the feeding lifting roller frame to rise, the feeding main transmission system drives the feeding and discharging driving roller assembly, the feeding and discharging roller extension assembly and the feeding and discharging roller set to rotate synchronously to convey the rod into the furnace, after completion, the feeding lifting system lowers the feeding lifting roller frame to complete the whole feeding action.

[0014] The present application has the following beneficial effects: The feeding mechanism for bar positioning of the present application is provided with a feeding positioning system on the main body frame, when the feeding end passive chain wheel set drags the bar to move from left to right with the chain, reaches the feeding and discharging roller set position of the feeding lifting system, the cylinder under the feeding positioning system pushes the positioning plate to rotate around the connecting shaft axis, and the bar is limited within a certain range from right to left by the three-section structure of the blocking plate, preventing multiple bars from being in place at one time; The feeding mechanism for bar positioning of the present application, the feeding and discharging roller is conical, the left side has a small diameter and a blocking edge, and the right side has a large diameter, when the feeding lifting system lifts the bar, the bar rolls from right to left due to gravity, stops at the blocking edge, and is accurately positioned. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view of the feeding mechanism for bar positioning of the present application; Figure 2 It is a top view of the feeding mechanism for bar positioning of the present application; Figure 3 It is a left view of the feeding mechanism for bar positioning of the present application; Figure 4 It is an axial side view of the main body frame in the feeding mechanism for bar positioning of the present application; Figure 5 It is an axial side view of the base in the feeding mechanism for bar positioning of the present application; Figure 6 It is an axial side view of the feeding lifting roller frame in the feeding mechanism for bar positioning of the present application; Figure 7 It is an axial side view of the feeding and discharging secondary frame body in the feeding mechanism for bar positioning of the present application; Figure 8 It is a front view of the feeding main transmission system in the feeding mechanism for bar positioning of the present application; Figure 9 It is a top view of the feeding main transmission system in the feeding mechanism for bar positioning of the present application; Figure 10 It is an axial side view of the feeding positioning system in the feeding mechanism for bar positioning of the present application; Figure 11 It is a left view of the feeding positioning system in the feeding mechanism for bar positioning of the present application; Figure 12 It is a front view of the feeding lifting system in the feeding mechanism for bar positioning of the present application; Figure 13 It is a top view of the feeding lifting system in the feeding mechanism for bar positioning of the present application; Figure 14 It is a front view of the feeding and discharging driving roller assembly in the feeding mechanism for bar positioning of the present application; Figure 15 This is a cross-sectional view of the loading and unloading active roller assembly in the feeding mechanism for bar positioning according to the present invention; Figure 16 This is a front view of the feed mechanism for bar positioning of the present invention, specifically the extension assembly of the loading and unloading roller conveyor. Figure 17 This is a cross-sectional view of the feed mechanism for bar positioning of the present invention, which includes an extension assembly of the loading and unloading roller conveyors. Figure 18 This is a front view of the loading and unloading roller assembly in the feeding mechanism for bar positioning according to the present invention; Figure 19 This is a cross-sectional view of the loading and unloading roller assembly in the feeding mechanism for bar positioning according to the present invention; Figure 20 This is a cross-sectional view of the first drive steering roller assembly in the feeding mechanism for bar positioning according to the present invention; Figure 21 This is a cross-sectional view of the second drive steering roller assembly in the feeding mechanism for bar positioning according to the present invention; Figure 22 This is a cross-sectional view of the third drive steering roller assembly in the feeding mechanism for bar positioning according to the present invention; Figure 23 This is a cross-sectional view of the fourth transmission steering roller assembly in the feeding mechanism for bar positioning according to the present invention; Figure 24 This is an isometric view of the feed roller conveyor guard assembly in the feeding mechanism for bar positioning according to the present invention; Figure 25 This is a front view of the passive sprocket assembly at the feeding end of the feeding mechanism for bar positioning according to the present invention; Figure 26 This is a cross-sectional view of the passive sprocket assembly at the feeding end of the feeding mechanism for bar positioning according to the present invention.

[0016] In the figure: 1 - main body frame; 2 - main feeding drive system; 3 - feeding positioning system; 4 - feeding lifting system; 5 - feeding end passive sprocket set; 11 - base; 111 - motor mounting plate; 112 - elevator mounting plate; 113 - guide column hole; 12 - feeding lifting roller frame; 121 - speed reducer mounting plate; 122 - first mounting seat; 123 - second mounting seat; 124 - mounting hole; 125 - first mounting plate; 126 - second mounting plate; 127 - H-shaped support; 13 - second stage loading frame; 131 - sprocket set mounting hole; 132 - baffle; 133 - frame plate main body; 21 - motor; 22 - speed reducer; 23 - motor sprocket; 24 - loading and unloading driving roller assembly; 25 - loading and unloading roller bed extension assembly; 26 - loading and unloading roller set; 27 - first transmission deflection roller assembly; 28 - second transmission deflection roller assembly; 29 - third transmission deflection roller assembly; 210 - fourth transmission deflection roller assembly; 220 - motor sprocket cover; 230 - feeding roller bed cover assembly; 31 - single ear ring mounting plate; 32 - single ear ring; 33 - air cylinder; 34 - joint; 35 - first belt stand bearing; 36 - bearing seat mounting plate; 37 - positioning plate; 38 - connecting shaft; 39 - lower ring block; 310 - key; 320 - upper ring block; 41 - lifting roller frame guide column; 42 - lifting motor; 43 - screw elevator; 44 - linear bearing; 45 - lifting lead screw nut seat; 46 - lifting seat guide column pressing plate; 47 - lead screw cover; 48 - roller bed lifting transmission shaft; 49 - second belt stand bearing; 410 - shaft coupling; 51 - sprocket shaft pressing plate; 52 - sprocket shaft; 53 - spacer sleeve; 54 - fifth bearing; 55 - passive sprocket; 56 - hole elastic retainer; 241 - double sprocket; 242 - third belt stand bearing; 243 - driving roller; 244 - first single sprocket; 245 - first sprocket pressing plate; 251 - second single sprocket; 252 - fourth belt stand bearing; 253 - first loading and unloading roller; 254 - second sprocket pressing plate; 255 - roller bed extension frame; 261 - fifth belt stand bearing; 262 - second loading and unloading roller; 263 - third single sprocket; 264 - third sprocket pressing plate; 271 - first deflection roller shaft; 272 - first deflection sprocket; 273 - first bearing; 274 - fourth sprocket pressing plate; 281 - second deflection roller shaft; 282 - second deflection sprocket; 283 - second bearing; 284 - fifth sprocket pressing plate; 291 - first mounting plate; 292 - third deflection roller shaft; 293 - third deflection sprocket; 294 - third bearing; 295 - sixth sprocket pressing plate; 2101 - second mounting plate; 2102 - fourth deflection roller shaft; 2103 - fourth deflection sprocket; 2104 - fourth bearing; 2105 - seventh sprocket pressing plate; 2301 - roller bed cover; 2302 - cover mounting plate. DETAILED DESCRIPTION

[0017] The application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1 The present invention provides a feeding mechanism for positioning bars, such as... Figure 3 As shown, it includes a main frame 1, on which a feeding main drive system 2, a feeding positioning system 3, a feeding lifting system 4, and a feeding end passive sprocket group 5 are installed; like Figure 4 As shown, the main frame 1 includes a base 11, a feeding lifting roller frame 12, and a secondary feeding frame 13, which provides structural support for the entire mechanism; the feeding lifting roller frame 12 is provided on the base 11, and the secondary feeding frame 13 is provided on the feeding lifting roller frame 12. like Figure 5 As shown, a motor mounting plate 111 is provided on the side of the base 11, and a lifting platform mounting plate 112 is also provided at both ends of one side of the base 11. Four guide column holes 113 are also provided on the base 11, with each pair of guide column holes 113 located on both sides of the lifting platform mounting plate 112. like Figure 6 As shown, the feeding lifting roller frame 12 includes a feeding frame body mounted on a base 11. Several H-shaped brackets 127 are arranged side by side on the feeding frame body. Two first mounting seats 122 are provided on the top of each H-shaped bracket 127. A second mounting seat 123 is provided on the feeding frame body between every two H-shaped brackets 127. A reducer mounting plate 121 is also provided on one side of the feeding frame body. Two first mounting plates 125 and one second mounting plate 126 are provided on the side of the feeding frame body. The second mounting plate 126 is located between the two first mounting plates 125. Mounting holes 124 are provided at both ends of the feeding frame body. like Figure 7 As shown, the secondary feeding frame 13 includes a frame plate body 133 disposed on one side of the H-shaped bracket 127, and the ends of multiple frame plate bodies 133 are connected by baffles 132, as shown. Figure 1 As shown, a horizontal plate is also provided between the multiple frame plates 133 main bodies, and the side of the frame plate main body 133 is connected to the side of the H-shaped bracket 127; two clamping plates are provided at the end of the frame plate main body 133, and each clamping plate is provided with a sprocket assembly mounting hole 131; The main feeding drive system 2 is installed on the feeding lifting roller frame 12 to provide feeding power. The feeding positioning system 3 is fixed to the side of the secondary feeding frame 13 to assist in the positioning of the bar. The passive sprocket group 5 at the feeding end is installed at its end. The feeding lifting system 4 is located at the bottom of the feeding lifting roller frame 12. After the bar is in the lateral position, it is raised to lift the bar and then fed.

[0019] Example 2 Furthermore, such as Figure 8 and Figure 9As shown, the feeding main transmission system 2 comprises a motor 21, a speed reducer 22, a motor sprocket 23, an up-down feeding driving roller assembly 24, an up-down feeding roller bed extension assembly 25, an up-down feeding roller group 26, a first transmission deflection roller assembly 27, a second transmission deflection roller assembly 28, a third transmission deflection roller assembly 29, a fourth transmission deflection roller assembly 210, a motor sprocket cover 220 and a feeding roller bed cover assembly 230; as shown in Figure 2 As shown, the motor sprocket 23 is externally sleeved with the motor sprocket cover 220; The output shaft of the motor 21 is connected with the speed reducer 22, the output shaft of the speed reducer 22 is connected with the motor sprocket 23, and the motor 21, the speed reducer 22 and the motor sprocket 23 are installed on the speed reducer mounting plate 121 of the feeding lifting roller frame 12 and are adjusted in position and fixed by means of U-shaped holes and two side top screws.

[0020] The up-down feeding driving roller assembly 24 is arranged on the first mounting seat 122 at the foremost end, and the up-down feeding roller group 26 is arranged on the remaining first mounting seats 122, and the up-down feeding roller bed extension assembly 25 is fixed to the front end of the up-down feeding driving roller assembly 24, so that the distance between the front end and the furnace door opening can be flexibly compensated and adjusted, and the feeding can be carried out synchronously and rotationally; Figure 14 Figure 15 As shown, the up-down feeding driving roller assembly 24 comprises a double sprocket 241, a third belt stand type bearing 242, a driving roller 243, a first single sprocket 244 and a first sprocket pressing plate 245; the driving roller 243 is provided with a journal segment at both ends in the axial direction thereof, the inner rings of the two third belt stand type bearings 242 are respectively in interference fit with the journal segments at both ends of the driving roller 243, the outer rings of the third belt stand type bearings 242 are in transition fit with the inner holes of the bearing seats, and the bearing seats are detachably connected with the first mounting seat 122 through fastening bolts, so as to realize the rotatable support and installation positioning of the driving roller 243; Key grooves are formed in the shaft heads at both ends of the driving roller 243 in the radial direction, the double sprocket 241 and the first single sprocket 244 are both sleeved on the shaft head of the driving roller 243 and are fixed and positioned in the circumferential direction by means of the flat keys and the driving roller 243, and the central axes of the double sprocket 241 and the first single sprocket 244 are coincident with the central axis of the driving roller 243; the side end faces of the double sprocket 241 and the first single sprocket 244 are both provided with the first sprocket pressing plate 245, and the abutting faces of the first sprocket pressing plate 245 are respectively parallel to and fully abut against the end faces of the corresponding sprockets; the first sprocket pressing plate 245 forms a clamping force in the axial direction of the driving roller 243, so as to axially limit and fix the double sprocket 241 and the first single sprocket 244 at the shaft head of the driving roller 243; the inner side teeth of the motor sprocket 23 and the double sprocket 241 are connected by a chain to transmit power; Figure 16 Figure 17 ​​​​As shown, the up-down feeding roller way extension assembly 25 comprises a second single sprocket 251, a fourth belt type pedestal bearing 252, a first up-down feeding roller 253, a second sprocket pressing plate 254 and a roller way extension frame 255.

[0021] The roller way extension frame 255 is a symmetrical frame structure, both ends of which are provided with bearing mounting stations, and the two fourth belt type pedestal bearings 252 are fixed on both ends of the roller way extension frame 255 through bolts. The first up-down feeding roller 253 is horizontally arranged, and coaxially arranged support shaft necks are integrally formed at both axial ends of the first up-down feeding roller 253. The outer diameter of the support shaft necks is adapted to the inner diameter of the inner ring of the fourth belt type pedestal bearing 252, so that the first up-down feeding roller 253 can be rotatably assembled on the roller way extension frame 255 through the two fourth belt type pedestal bearings 252. A second single sprocket 251 is arranged at one end of the support shaft neck, and the second single sprocket 251 is connected with the outer side teeth of the double sprocket 241 through a chain transmission to realize power transmission. The second sprocket pressing plate 254 is attached to the side end face of the second single sprocket 251 away from the body of the first up-down feeding roller 253 to realize axial limiting and fixing of the second single sprocket 251. As shown in Figure 18 and Figure 19 The up-down feeding roller group 26 comprises a fifth belt type pedestal bearing 261, a second up-down feeding roller 262, a third single sprocket 263 and a third sprocket pressing plate 264. Coaxially arranged mounting shaft necks are integrally formed at both axial ends of the second up-down feeding roller 262. The inner rings of the two fifth belt type pedestal bearings 261 are in interference fit with the mounting shaft necks at both ends of the second up-down feeding roller 262, and the outer rings of the fifth belt type pedestal bearings 261 are in transition fit with the inner holes of the bearing seats. The bearing seats are detachably connected with the first mounting seat 122 through fastening bolts to realize stable and rotatable support of the second up-down feeding roller 262. One end mounting shaft neck of the second up-down feeding roller 262 extends to form a transmission shaft head, the third single sprocket 263 is positioned and sleeved on the transmission shaft head through a flat key, and the third sprocket pressing plate 264 is attached to the side end face of the third single sprocket 263 away from the body of the second up-down feeding roller 262 and is threadedly connected with the end face of the transmission shaft head through bolts to realize axial limiting and fixing of the third single sprocket 263. The central axis of the second up-down feeding roller 262 is coplanar and parallel with the central axis of the first up-down feeding roller 253, and the third single sprocket 263 is connected with the first single sprocket 244 through a chain transmission to realize synchronous transmission of power.

[0022] The first transmission deflection roller assembly 27 is mounted on the second mounting seat 123; as shown in Figure 20As shown, the first transmission deflection roller assembly 27 includes a first deflection roller shaft 271, a first deflection sprocket 272, a first bearing 273, and a fourth sprocket pressing plate 274. The first bearing 273 is sleeved on the corresponding journal of the first deflection roller shaft 271 through a bearing sleeve, and is arranged on the second mounting seat 123. The first deflection sprocket 272 is sleeved on the keyed shaft section of the first deflection roller shaft 271, so that the sprocket can rotate synchronously with the roller shaft. The fourth sprocket pressing plate 274 is connected to the end face of the first deflection roller shaft 271 by fasteners, and presses the first deflection sprocket 272 at the shaft shoulder of the roller shaft, preventing the sprocket from moving axially.

[0023] The two groups of second transmission deflection roller assemblies 28 are respectively arranged in the mounting holes 124 at the front and rear positions of the bottom beam of the feed lifting roller frame 12. Figure 21 As shown, the second transmission deflection roller assembly 28 includes a second deflection roller shaft 281, a second deflection sprocket 282, a second bearing 283, and a fifth sprocket pressing plate 284. The second bearing 283 is sleeved on the corresponding journal of the second deflection roller shaft 281 through a bearing sleeve, and the outer ring of the second bearing 283 is matched with the mounting hole 124, which not only realizes the positioning of the roller shaft, but also ensures the flexible rotation of the roller shaft. The second deflection sprocket 282 is sleeved on the end shaft section of the second deflection roller shaft 281, so that the sprocket can rotate synchronously with the roller shaft. The fifth sprocket pressing plate 284 is fastened on the end face of the second deflection roller shaft 281 by fasteners, and presses the second deflection sprocket 282 at the shaft shoulder of the roller shaft, preventing the sprocket from moving axially or loosening on the shaft.

[0024] The two groups of third transmission deflection roller assemblies 29 are respectively arranged on the main plate 125 at the bottom of the feed lifting roller frame 12. Figure 22 As shown, the third transmission deflection roller assembly 29 includes a first mounting plate 291, a third deflection roller shaft 292, a third deflection sprocket 293, a third bearing 294, and a sixth sprocket pressing plate 295. The roller shaft of the third deflection roller shaft 292 passes through the shaft hole in the first mounting plate 291, realizing the positioning of the shaft on the mounting plate. The third bearing 294 is sleeved on the corresponding journal of the third deflection roller shaft 292, supporting the roller shaft and enabling the roller shaft to rotate flexibly relative to the mounting plate. The third deflection sprocket 293 is sleeved on the end shaft section of the third deflection roller shaft 292, so that the sprocket can rotate synchronously with the roller shaft. The sixth sprocket pressing plate 295 is arranged on the end face of the third deflection roller shaft 292 by fasteners, and tightly presses the third deflection sprocket 293 at the shaft shoulder of the roller shaft, preventing the sprocket from moving axially or loosening on the shaft.

[0025] The fourth transmission deflection roller assembly 210 is arranged on the long plate 126 at the bottom of the feed lifting roller frame 12, and is used to change the winding direction of the chain to prevent interference with the driven sprocket set 5 at the feeding end.

[0026] As shown, Figure 23As shown, the fourth transmission deflection roller assembly 210 includes a second mounting plate 2101, a fourth deflection roller shaft 2102, a fourth deflection sprocket 2103, a fourth bearing 2104, and a seventh sprocket pressing plate 2105. The fourth deflection roller shaft 2102 passes through the corresponding shaft hole of the second mounting plate 2101 to realize the positioning of the shaft. The fourth bearing 2104 is sleeved on the shaft neck of the fourth deflection roller shaft 2102 through a bearing sleeve, and the bearing outer ring cooperates with the bearing mounting hole of the second mounting plate 2101 to support the roller shaft and ensure its rotation flexibility. The fourth deflection sprocket 2103 is sleeved on the end shaft section of the fourth deflection roller shaft 2102 and rotates synchronously with the roller shaft. The seventh sprocket pressing plate 2105 is connected to the end face of the fourth deflection roller shaft 2102 by fasteners to press the fourth deflection sprocket 2103 against the shaft shoulder of the roller shaft, preventing the sprocket from loosening axially.

[0027] The first single sprocket 244 of the feeding and discharging driving roller assembly 24, the third single sprocket 263 of the feeding and discharging roller assembly 26, the first deflection sprocket 272 of the first transmission deflection roller assembly 27, the second deflection sprocket 282 of the second transmission deflection roller assembly 28, the third deflection sprocket 293 of the third transmission deflection roller assembly 29, and the fourth deflection sprocket 2103 of the fourth transmission deflection roller assembly 210 are connected by chains to realize synchronous transmission and avoid interference with the feeding end passive sprocket assembly 5.

[0028] Embodiment 3 Further, as shown in Figure 10 , Figure 11 The feeding positioning system 3 includes a single ring mounting plate 31, a single ring 32, a cylinder 33, a joint 34, a first vertical seat bearing 35, a bearing seat mounting plate 36, a positioning plate 37, a connecting shaft 38, a lower ring block 39, a key 310, and an upper ring block 320. A plurality of positioning plates 37 are sleeved on the connecting shaft 38, and the positioning plates 37 are fixed with the connecting shaft 38 through the lower ring block 39, the key 310, and the upper ring block 320. The bottom of the circular segment of the lower ring block 39 is provided with a key groove, and the upper ring block 320 is connected together through screws to form a through hole with a key. Three positioning plates 37 are further provided with bearing mounting plates 36 at the ends, and the bearing mounting plates 36 are arranged on the side of the second-stage feeding frame body 13. The single ring mounting plate 31 is fixed on the rear side of the base 11, the single ring 32 is fixed on the side of the single ring mounting plate 31 through screws, the tail of the cylinder 33 is connected with the single ring 32, the telescopic part is connected with the middle part of one of the positioning plates 37 through the joint 34, and is used to drive the retracting and extending actions of the positioning plate 37. The positioning plate 37 is a three-segment broken line type, and is provided with weight-reducing holes and connection holes for the joint 34.

[0029] As shown in Figure 12 and Figure 13As shown, the feeding lifting system 4 includes lifting roller frame guide column 41, lifting motor 42, screw lifting machine 43, linear bearing 44, lifting screw nut seat 45, lifting seat guide column pressing plate 46, screw shroud 47, roller lifting transmission shaft 48, second vertical seat bearing 49 and coupling 410; the lifting motor 42 is fixedly installed on the lower side of the motor mounting plate 111 of the base 11, two groups of screw lifting machines 43 are fixedly installed at the lifting machine mounting plate 112 position, the lifting roller frame guide column 41 passes through the guide column hole 113 from bottom to top and is connected with the feeding lifting roller frame 12. The lifting motor 42 is connected with the two groups of screw lifting machines 43 through the coupling 410 and the roller lifting transmission shaft 48. The linear bearing 44 is assembled in the guide column hole 113 of the base 11, and the lifting roller frame guide column 41 passes through the inner ring of the linear bearing 44, so that the guide column can smoothly slide up and down along the linear bearing. One end of the lifting screw nut seat 45 is connected with the screw output end of the screw lifting machine 43, and the other end is connected with the feeding lifting roller frame 12. When the screw lifting machine 43 operates, the screw drives the nut seat to lift, and in turn drives the feeding lifting roller frame 12 to lift synchronously. The lifting seat guide column pressing plate 46 is installed at the corresponding position of the feeding lifting roller frame 12, and presses the upper end of the lifting roller frame guide column 41, which is used to fix the connection between the guide column and the feeding lifting roller frame 12, prevent the guide column from separating or loosening from the roller frame. The screw shroud 47 is sleeved on the outside of the screw of the screw lifting machine 43, which plays a protective role. The second vertical seat bearing 49 is installed at the corresponding support position of the base 11, which supports the roller lifting transmission shaft 48, so that the transmission shaft can keep stable during rotation, reduce friction and shaking during operation.

[0030] As shown in Figure 24 , the feeding roller cover assembly 230 is composed of roller cover 2301 and cover mounting plate 2302, which provides transmission protection and ensures personnel safety. The feeding roller cover assembly 230 is installed on the side of the feeding lifting roller frame 12, and the cover mounting plate 2302 is fixed with the roller cover 2301 by screws. The roller cover 2301 is used to protect the feeding main transmission system 2 and the feeding positioning system 3; Example 4 Further, as shown in Figure 25 , Figure 26As shown, the feeding end driven sprocket set 5 includes a sprocket shaft pressing plate 51, a sprocket shaft 52, a spacer sleeve 53, a fifth bearing 54, a driven sprocket 55 and a hole elastic retainer 56; seven sets of feeding end driven sprocket set 5 are installed at the positions of the sprocket set installation holes 131 at the end of the second-stage charging frame 13; the sprocket shaft 52 penetrates through the sprocket set installation hole 131, and the fifth bearing 54 is assembled on the shaft neck of the sprocket shaft 52, while the bearing outer ring cooperates with the inner hole of the driven sprocket 55 to support the driven sprocket 55 so that it can rotate flexibly relative to the sprocket shaft. The spacer sleeve 53 is sleeved on the sprocket shaft 52, and the hole elastic retainer 56 is clamped into the retainer groove in the inner hole of the driven sprocket 55 to limit the fifth bearing 54 from moving in the sprocket inner hole in the axial direction. The sprocket shaft pressing plate 51 is fixed on the end face of the sprocket shaft 52 by fasteners to press the components of the entire sprocket set on the sprocket shaft, and meanwhile the connection and fixation of the sprocket set with the sprocket set installation holes 131 of the second-stage charging frame 13 are realized; The first up-down roller 253 and the second up-down roller 262 are conical, have a small diameter and a blocking edge on the left side, and have a large diameter on the right side, and are arranged in a row. On the one hand, they are used for feeding the bar into the furnace, and on the other hand, they realize the positioning of the bar on the left side by using their own structure.

[0031] Example 5 The feeding mechanism for bar positioning of the application has the following specific working principle: The left side of the second-stage charging frame 13 of the mechanism can be connected with a discharging frame, the bar is placed on the chain set, the feeding end driven sprocket set 5 rotates to drive the bar on the chain to move horizontally from left to right, when the bar reaches the left side position of the first up-down roller 253 and the second up-down roller 262, the extension rod of the cylinder 33 pushes out to drive the positioning plate 37 to rotate counterclockwise around the connecting shaft 38, thereby preventing the bar from continuing to be conveyed to the right side, after the feeding end driven sprocket set 5 stops rotating, the extension rod of the cylinder 33 is retracted, the positioning plate 37 rotates clockwise around the connecting shaft 38, the feeding lifting system 4 lifts the feeding lifting roller frame 12 upward, the up-down main driven roller assembly 24, the up-down roller way extension assembly 25 and the up-down roller set 26 installed above the feeding lifting roller frame 12 lift the bar upward, since the first up-down roller 253 and the second up-down roller 262 are conical, have a small diameter and a blocking edge on the left side, and have a large diameter on the right side, the bar is positioned on the left side due to its own weight, the motor 21 of the feeding main transmission system 2 drives the up-down main driven roller assembly 24, the up-down roller way extension assembly 25 and the up-down roller set 26 to rotate synchronously to convey the bar into the furnace, after the completion, the feeding lifting system 4 lowers the feeding lifting roller frame 12, thereby completing the entire feeding action, and subsequent feeding into the furnace only needs to repeat the process.

[0032] Example 6 The feeding method for positioning the rod of the present application is realized by using the feeding mechanism for positioning the rod, specifically, the rod on the chain is driven by the rotation of the feeding end driven sprocket set 5 to move horizontally from left to right, when reaching the side of the feeding and discharging roller set 26, the feeding positioning system 3 is used for auxiliary positioning, the feeding lifting system 4 lifts the feeding lifting roller frame 12 to rise, the feeding main drive system 2 drives the feeding and discharging driven roller assembly 24, the feeding and discharging roller way extension assembly 25 and the feeding and discharging roller set 26 to rotate synchronously to convey the rod into the furnace, after completion, the feeding lifting system 4 lowers the feeding lifting roller frame 12 to descend, and the whole feeding action is completed.

Claims

1. Feed mechanism for positioning of a bar, characterized in that The utility model provides a bar feeding device, including main body frame (1), be provided with feeding main transmission system (2), feeding positioning system (3), feeding lifting system (4) and feeding end passive chain wheel group (5) on the main body frame (1), the main body frame (1) includes base (11), feeding lifting roller frame (12) and upper feeding secondary frame body (13), be provided with feeding lifting roller frame (12) on the base (11), be provided with upper feeding secondary frame body (13) on feeding lifting roller frame (12), feeding main transmission system (2) is installed on feeding lifting roller frame (12), is used for providing power, feeding positioning system (3) is fixed in upper feeding secondary frame body (13) side part, assists bar positioning, and feeding end passive chain wheel group (5) is installed in upper feeding secondary frame body (13) end, and feeding lifting system (4) is located in the bottom of feeding lifting roller frame (12), and after lifting and lifting bar, feed.

2. A feed mechanism for positioning a bar as claimed in claim 1, characterized in that The side of the base (11) is provided with a motor mounting plate (111), and the base (11) is further provided with a lifting machine mounting plate (112) at one side and two ends, and the base (11) is further provided with four guide column holes (113), and every two guide column holes (113) are located on both sides of the lifting machine mounting plate (112); The feeding lifting roller frame (12) includes a feeding frame body arranged on the base (11), a plurality of H-shaped supports (127) are arranged side by side on the feeding frame body, two first mounting seats (122) are arranged on the top of the H-shaped support (127), and a second mounting seat (123) is arranged on the feeding frame body between every two H-shaped supports (127); The feeding frame body is further provided with a speed reducer mounting plate (121) on one side; The feeding frame body is provided with two first mounting plates (125) and a second mounting plate (126) on the side; The feeding frame body is provided with mounting holes (124) at two ends, respectively; The upper feeding secondary frame body (13) includes a frame plate main body (133) arranged on one side of the H-shaped support (127), the end portions of a plurality of frame plate main bodies (133) are connected through a baffle (132), and the side of the frame plate main body (133) is connected with the side of the H-shaped support (127); The end portion of the frame plate main body (133) is provided with two clamping plates, and the chain wheel set mounting holes (131) are arranged on the two clamping plates.

3. A feed mechanism for positioning a bar as claimed in claim 2, wherein, The feeding main transmission system (2) includes a motor (21), a speed reducer (22), a motor chain wheel (23), an upper and lower feeding driving roller assembly (24), an upper and lower feeding roller way extension assembly (25), an upper and lower feeding roller group (26), a first transmission deflection roller assembly (27), a second transmission deflection roller assembly (28), a third transmission deflection roller assembly (29), and a fourth transmission deflection roller assembly (210). The motor (21) output shaft is connected with a speed reducer (22), the output shaft of the speed reducer (22) is connected with a motor chain wheel (23), the motor (21), the speed reducer (22), the motor chain wheel (23) are installed on the speed reducer mounting plate (121) of the feed lifting roller frame (12); The first mounting seat (122) at the most front end is provided with an upper and lower feeding driving roller assembly (24); The rest of the first mounting seat (122) is provided with an upper and lower feeding roller group (26), and the upper and lower feeding roller extension assembly (25) is fixed to the front end of the upper and lower feeding driving roller assembly (24); The upper and lower feeding driving roller assembly (24) comprises a double chain wheel (241), a third belt stand type bearing (242), a driving roller (243), a first single chain wheel (244) and a first chain wheel pressing plate (245). Two third belt stand type bearings (242) are connected with the driving roller (243) at both ends, the third belt stand type bearing (242) is connected with the first mounting seat (122), the double chain wheel (241) and the first single chain wheel (244) are sleeved on the driving roller (243); The side end face of the double chain wheel (241) and the first single chain wheel (244) is provided with the first chain wheel pressing plate (245), and the motor chain wheel (23) and the inner side teeth of the double chain wheel (241) are connected by a chain. The upper and lower feeding roller extension assembly (25) comprises a second single chain wheel (251), a fourth belt stand type bearing (252), a first upper and lower feeding roller (253), a second chain wheel pressing plate (254) and a roller extension frame (255). Two fourth belt stand type bearings (252) are fixed to both ends of the roller extension frame (255), and the first upper and lower feeding roller (253) is assembled on the roller extension frame (255) through the two fourth belt stand type bearings (252). One end of the first upper and lower feeding roller (253) is provided with a second single chain wheel (251), the second single chain wheel (251) and the outer side teeth of the double chain wheel (241) are connected by a chain, and the second chain wheel pressing plate (254) is attached to the side end face of the second single chain wheel (251) away from the first upper and lower feeding roller (253) body. The upper and lower feeding roller group (26) comprises a fifth belt stand type bearing (261), a second upper and lower feeding roller (262), a third single chain wheel (263) and a third chain wheel pressing plate (264). Two fifth belt stand type bearings (261) are respectively connected with both ends of the second upper and lower feeding roller (262), the fifth belt stand type bearing (261) is connected with the first mounting seat (122), one end of the second upper and lower feeding roller (262) is connected with the third single chain wheel (263), the third chain wheel pressing plate (264) is attached to the side end face of the third single chain wheel (263) away from the second upper and lower feeding roller (262) body, and the third single chain wheel (263) and the first single chain wheel (244) are connected by a chain.

4. A feed mechanism for positioning a bar as claimed in claim 3, characterized in that The first transmission steering roller assembly (27) comprises a first steering roller shaft (271), a first steering sprocket (272), a first bearing (273), and a fourth sprocket pressing plate (274); the first bearing (273) is sleeved on the first steering roller shaft (271), the first bearing (273) is arranged on the second mounting seat (123), the first steering sprocket (272) is sleeved on the first steering roller shaft (271), and the fourth sprocket pressing plate (274) is connected to the end face of the first steering roller shaft (271); Two groups of second transmission steering roller assemblies (28) are respectively arranged in mounting holes (124) at front and rear positions of a bottom cross beam of the feeding lifting roller frame (12); the second transmission steering roller assembly (28) comprises a second steering roller shaft (281), a second steering sprocket (282), a second bearing (283), and a fifth sprocket pressing plate (284); the second bearing (283) is sleeved on the second steering roller shaft (281), the second steering sprocket (282) is sleeved on the second steering roller shaft (281), and the fifth sprocket pressing plate (284) is fastened to the end face of the second steering roller shaft (281); Two groups of third transmission steering roller assemblies (29) are respectively arranged on main plates (125) at the bottom of the feeding lifting roller frame (12); the third transmission steering roller assembly (29) comprises a first mounting plate (291), a third steering roller shaft (292), a third steering sprocket (293), a third bearing (294), and a sixth sprocket pressing plate (295); the roller shaft of the third steering roller shaft (292) penetrates through an axle hole in the first mounting plate (291), the third bearing (294) is sleeved on the third steering roller shaft (292), the third steering sprocket (293) is sleeved on the end portion of the third steering roller shaft (292), and the sixth sprocket pressing plate (295) is arranged on the end face of the third steering roller shaft (292); The fourth transmission steering roller assembly (210) is arranged on a long plate (126) at the bottom of the feeding lifting roller frame (12), and the fourth transmission steering roller assembly (210) comprises a second mounting plate (2101), a fourth steering roller shaft (2102), a fourth steering sprocket (2103), a fourth bearing (2104), and a seventh sprocket pressing plate (2105); the fourth steering roller shaft (2102) penetrates through corresponding axle holes in the second mounting plate (2101), the fourth bearing (2104) is sleeved on the fourth steering roller shaft (2102), the fourth steering sprocket (2103) is sleeved on the end portion of the fourth steering roller shaft (2102), and the seventh sprocket pressing plate (2105) is connected to the end face of the fourth steering roller shaft (2102) through fasteners. The first single chain wheel (244) of the feeding and discharging driving roller assembly (24), the third single chain wheel (263) of the feeding and discharging roller group (26), the first turning sprocket (272) of the first driving turning roller assembly (27), the second turning sprocket (282) of the second driving turning roller assembly (28), the third turning sprocket (293) of the third driving turning roller assembly (29) and the fourth turning sprocket (2103) of the fourth driving turning roller assembly (210) are connected through chains.

5. A feed mechanism for positioning a bar as claimed in claim 4, wherein, The first feeding and discharging roller (253) and the second feeding and discharging roller (262) are conical and arranged in rows.

6. The feed mechanism for positioning of a bar as claimed in claim 4, wherein, The feeding positioning system (3) comprises a single-ring mounting plate (31), a single ring (32), a cylinder (33), a joint (34), a first vertical seat bearing (35), a bearing seat mounting plate (36), a positioning plate (37) and a connecting shaft (38). A plurality of positioning plates (37) are sleeved on the connecting shaft (38), and the positioning plates (37) are fixed with the connecting shaft (38). Three of the positioning plates (37) are further provided with bearing mounting plates (36) at the ends, the bearing mounting plates (36) are arranged on the side of the second-stage feeding frame (13), the single-ring mounting plate (31) is fixed on the rear side of the base (11), the single ring (32) is fixed on the side of the single-ring mounting plate (31), the tail of the cylinder (33) is connected with the single ring (32), the telescopic part is connected with the middle part of one of the positioning plates (37) through the joint (34), and the positioning plate (37) is driven to retract and extend.

7. A feed mechanism for positioning a bar as claimed in claim 6, characterised in that, The feeding lifting system (4) comprises lifting roller frame guide columns (41), lifting motors (42), spiral elevators (43), linear bearings (44), lifting screw nut seats (45), lifting seat guide column pressing plates (46), roller lifting transmission shafts (48), second vertical seat bearings (49) and shaft couplings (410). The lifting motors (42) are fixedly installed on the lower side of the motor mounting plate (111) of the base (11), two groups of the spiral elevators (43) are fixed at the positions of the elevator mounting plate (112), the lifting roller frame guide columns (41) pass through the guide column holes (113) from bottom to top and are connected with the feeding lifting roller frame (12); the lifting motors (42) are connected with the two groups of spiral elevators (43) through the shaft couplings (410) and the roller lifting transmission shafts (48); the linear bearings (44) are assembled in the guide column holes (113) of the base (11), the lifting roller frame guide columns (41) pass through the linear bearings (44), one end of the lifting screw nut seat (45) is connected with the lead screw output end of the spiral elevator (43), and the other end is connected with the feeding lifting roller frame (12).

8. A feed mechanism for positioning a bar as claimed in claim 7, characterized in that The feeding end driven sprocket set (5) comprises a sprocket shaft pressing plate (51), a sprocket shaft (52), a spacer sleeve (53), a fifth bearing (54), a driven sprocket (55) and a hole elastic retainer (56); seven groups of the feeding end driven sprocket set (5) are installed at the sprocket set mounting hole (131) position at the end of the second stage feeding frame body (13); the sprocket shaft (52) penetrates through the sprocket set mounting hole (131), the fifth bearing (54) is assembled on the sprocket shaft (52) and cooperates with the inner hole of the driven sprocket (55), the spacer sleeve (53) is sleeved on the sprocket shaft (52), the hole elastic retainer (56) is clamped into the inner hole of the driven sprocket (55), and the sprocket shaft pressing plate (51) is fixed on the end face of the sprocket shaft (52) through fasteners.

9. A feeding method for positioning of a bar, which is implemented using the feeding mechanism for positioning of a bar according to claim 8, characterized in that, Specifically: The feeding end driven sprocket set (5) rotates to drive the bar on the chain to move horizontally from left to right, when reaching the side of the feeding and discharging roller set (26), the feeding positioning system (3) is used for auxiliary positioning, the feeding lifting system (4) lifts the feeding lifting roller frame (12) to rise, the feeding main transmission system (2) drives the feeding and discharging driving roller assembly (24), the feeding and discharging roller way extension assembly (25) and the feeding and discharging roller set (26) to rotate synchronously to convey the bar into the furnace, after completion, the feeding lifting system (4) lowers the feeding lifting roller frame (12) to descend, and the whole feeding action is completed.

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