Threading and feeding method in cold rolling vertical feeding

Abstract

According to the threading and feeding method in cold rolling vertical feeding, a threading device is installed on a feeding rack, the threading device comprises an electric hoist installed on the upper portion of the feeding rack, the lifting end of the electric hoist is fixedly connected with a steel bar clamp, and a clamping and conveying mechanism is fixedly installed at the position close to a top pulley; a steel feeding mechanism is installed on the machine frame behind the top pulley, and the steel feeding mechanism comprises the steps that firstly, when production starts, the head of a steel bar on a coil is clamped to a steel bar clamp; (2) the electric hoist drives the reinforcing steel bar to rise between a driving roller and a driven roller; (3) a pinch motor operates to drive a driving roller to rotate and convey steel bars upwards; (4) clamping the head of the reinforcing steel bar into the clamping pincers when the head of the reinforcing steel bar moves to the position close to the clamping pincers, (5) driving the head of the reinforcing steel bar to move downwards to a bottom pulley through linkage operation of the clamping and conveying mechanism and the steel conveying mechanism, and (6) unloading the reinforcing steel bar from the clamping pincers, enabling the clamping and conveying mechanism to continuously operate, and manually guiding the head of the reinforcing steel bar to a follow-up rolling miller.

Description

Technical Field

[0001] The invention relates to vertical feeding, threading and feeding of cold-rolled steel bars, and belongs to the technical field of cold-rolled steel bars. Background Art

[0002] In the production of cold-rolled steel bars, there are two types of feeding systems: horizontal feeding and vertical feeding. The radial direction of the inner hole of the horizontal feeding coil is in the up-and-down direction, while the radial direction of the inner hole of the vertical feeding coil is in the horizontal direction. The vertical feeding system (see patent ZL201410092198.0) has a vertical structure. The feeding machine fully utilizes the free gravity of the steel bars during the steel bar pulling process, which can eliminate some steel winding accidents caused by the nesting of steel bars. It has a low failure rate and can adapt to relatively high production speeds. A (fixed) pulley is installed on the top of the loading rack of the vertical loading machine. After the steel bar passes through the pulley, it runs down to the bottom, and then turns to be sent to the subsequent equipment. In order to better eliminate the steel winding accident, the vertical loading machine is generally of a higher height, and the height of the top pulley from the material coil is generally greater than 5 meters. At present, there are the following problems in vertical loading: First, at the beginning of production, it is necessary to pull the head of the steel bar from the coil position to the top pulley, and then bend it through the top pulley and pull it to the pulley at the bottom of the loading rack, and then pull it back through several supporting pulleys to the powered rolling mill. After the steel bar bites into the rolling roller, the active rolling mill pulls the steel bar to move. In the early stage of production, it is a time-consuming and laborious task to thread the head of the steel bar, especially for For raw materials with larger diameters, the labor intensity of workers is very high and it is easy to cause safety accidents; secondly, although vertical loading can largely avoid the occurrence of steel winding accidents, due to the complexity of coiling in transportation and storage, steel winding accidents still occur in the existing vertical loading system, with an average of about three times per shift (8 hours); thirdly, since there are a lot of oxide scales on the surface of the steel bars, the existing vertical loading system has a certain degree of descaling (oxide scale) effect by steering and conveying the steel bars, which reduces the load of the subsequent descaling process, but the current descaling effect of the loading process is limited, and a large amount of oxide scale will fall off between the loading and descaling processes, posing a hidden danger to the normal operation of nearby mechanical and electrical equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a threading and feeding method in cold rolling vertical feeding.

[0004] In order to achieve the purpose of the present invention, the following technical scheme is adopted: a threading and feeding method in a cold rolling vertical feeding, the cold rolling vertical feeding comprises a feeding frame, a top pulley is installed on the upper part of the feeding frame, the top pulley is rotatably connected to a power shaft, the power shaft is located at the center of the pulley, the power shaft is fixedly connected to the output shaft of the eccentric motor, and the power shaft is not concentric with the output shaft of the eccentric motor; A threading device is installed on the feeding frame. When the threading operation starts, the steel bar is fed into the powered rolling mill by the threading device. The threading device includes an electric hoist installed on the upper part of the feeding frame. The lifting end of the electric hoist is fixedly connected with a steel bar clamp. A clamping and feeding mechanism is fixedly installed near the top pulley. A steel feeding mechanism is installed on the frame behind the top pulley. The clamping mechanism includes a clamping motor fixedly connected to the feeding frame, an active roller fixedly connected to the output shaft of the clamping motor, a passive roller is arranged in cooperation with the active roller, the active roller and the passive roller are located at the same horizontal height, the passive roller is rotatably mounted on a wheel frame, the wheel frame is slidably arranged on a track, the track is fixedly connected to the feeding frame, an electric hydraulic cylinder is fixedly connected to the feeding frame, the wheel frame is fixedly connected to the action end of the electric hydraulic cylinder, the hydraulic cylinder drives the passive roller to approach or move away from the active roller, an inclined guide plate is installed above the active roller, and the guide plate is inclined backward from bottom to top; The steel feeding mechanism comprises a guide rail fixedly connected to the frame, the guide rail is tilted backward from top to bottom, a slider is slidably installed on the guide rail, a clamp is fixedly installed on the slider, a passive sprocket and a driving sprocket are rotatably installed on the upper part of the guide rail, the driving sprocket is driven by power, a chain is wrapped around the driving sprocket and the passive sprocket, and the slider is fixedly connected to the chain; The threading and feeding methods are as follows: 1) At the beginning of production, the staff located on the upper part of the feeding frame controls the electric hydraulic cylinder to move the passive roller away from the active roller, and then controls the electric hoist to descend and clamp the head of the coiled steel bar to the steel bar clamp; 2) The electric hoist drives the steel bar to rise between the active roller and the passive roller, controls the electric hydraulic cylinder to make the passive roller close to the active roller to clamp the steel bar, and loosens the steel bar clamp; 3) The operation of the clamping motor drives the active roller to rotate and transport the steel bars upward. After the head of the steel bar hits the guide plate, it moves in an arc shape toward the top pulley; 4) When the steel bar head moves close to the clamp, clamp the steel bar head into the clamp; 5) The clamping and feeding mechanism and the steel feeding mechanism operate in tandem, driving the steel bar head downward to the bottom pulley; 6) Remove the steel bar from the clamping pliers, keep the clamping mechanism running, and manually guide the head of the steel bar to the subsequent rolling mill so that the steel bar bites into the rolling roller; after the steel bar bites into the rolling roller, the electric hydraulic cylinder of the clamping mechanism moves and the passive roller moves away from the active roller.

[0005] 7) Run the rolling mill. The steel bars are moved backwards by the power of the rolling mill for production. The steel bars pass through the wheel groove of the top pulley. The eccentric motor runs during production. The top pulley rotates around the power shaft and makes eccentric motion under the action of the eccentric motor. The eccentric motion causes the steel bars to be continuously pulled and released during the movement.

[0006] Furthermore, the active roller and the passive roller are located obliquely above and in front of the top pulley.

[0007] The positive and beneficial technical effects of the present invention are: the electric hoist, the clamping and feeding mechanism, and the steel feeding mechanism are adopted to realize semi-automation during threading, effectively reducing the intensity of manual labor and avoiding the occurrence of safety accidents. During loading, the top pulley rotates around the power shaft while making eccentric movement under the action of the eccentric motor. The eccentric movement causes the steel bars to be continuously pulled and released during the movement. The steel bar spirals on the material roll are frequently and rhythmically pulled and released to produce up and down vibrations, which can smoothly separate the steel bars that are entangled together and avoid the occurrence of steel winding accidents. The eccentric motor that prevents steel winding accidents is located at the upper part, avoiding the occupation of the compact space at the lower part of the feeding system, which may cause interference during the feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is an overall schematic diagram of the present invention.

[0009] Figure 2 It is a schematic diagram of the eccentric motor drive.

[0010] Figure 3 It is a top view schematic diagram of the clamping and conveying mechanism. DETAILED DESCRIPTION

[0011] In order to more fully explain the implementation of the present invention, the implementation examples of the present invention are provided. These implementation examples are merely elaborations of the present invention and do not limit the scope of the present invention.

[0012] The present invention is further explained in detail in conjunction with the accompanying drawings, in which the marks are: 1: feeding frame; 2: top pulley; 3: electric hoist; 4: clamping motor; 5: active roller; 6: steel bar; 7: guide rail; 8: slider; 9: chain; 10: passive sprocket; 11: active sprocket; 12: eccentric motor; 13: output shaft of eccentric motor; 14: power shaft; 15: passive roller; 16: wheel frame; 17: electric hydraulic cylinder; 18: guide plate; 19: clamping pliers.

[0013] As shown in the accompanying drawings, a threading and feeding method in a cold rolling vertical feeding, the cold rolling vertical feeding includes a feeding frame 1, a top pulley 2 is installed on the upper part of the feeding frame 1, the top pulley 2 is rotatably connected to a power shaft 14, the power shaft 14 is located at the center of the pulley, the power shaft 14 is fixedly connected to the output shaft 13 of the eccentric motor, 12 shows the eccentric motor, the power shaft 14 is not concentric with the output shaft 14 of the eccentric motor.

[0014] A threading device is installed on the feeding frame. When the threading operation starts, the threading device is used to feed the steel bars into the powered rolling mill. The threading device includes an electric hoist 3 installed on the upper part of the feeding frame. The lifting end of the electric hoist is fixedly connected with a steel bar clamp. The steel bar clamp is very simple and can be equipped with an existing clamp. A clamping and feeding mechanism is fixedly installed near the top pulley, and a steel feeding mechanism is installed on the frame behind the top pulley.

[0015] The clamping mechanism includes a clamping motor 4 fixedly connected to the feeding frame, an active roller 5 fixedly connected to the output shaft of the clamping motor, a passive roller 15 is arranged in cooperation with the active roller, the active roller and the passive roller are located at the same horizontal height, the active roller and the passive roller are located obliquely above the front of the top pulley, the passive roller 13 is rotatably mounted on a wheel frame 16, the wheel frame 16 is slidably arranged on a track, the track is not shown in the figure, the track is fixedly connected to the feeding frame, the electric hydraulic cylinder 17 is fixedly connected to the feeding frame, the wheel frame is fixedly connected to the action end of the electric hydraulic cylinder, the electric hydraulic cylinder drives the passive roller to approach or move away from the active roller, and an inclined guide plate 18 is installed above the active roller, and the guide plate is inclined backward from bottom to top; The steel feeding mechanism comprises a guide rail 7 fixedly connected to the frame, the guide rail is tilted backward from top to bottom, a slider 8 is slidably mounted on the guide rail 7, a clamp 19 is fixedly mounted on the slider, a passive sprocket 10 and a driving sprocket 11 are rotatably mounted on the upper part of the guide rail, the driving sprocket is driven by power, a chain 9 is wrapped around the driving sprocket and the passive sprocket, and the slider 8 is fixedly connected to the chain; The threading and feeding methods are as follows: 1) At the beginning of production, the staff located on the upper part of the feeding frame controls the electric hydraulic cylinder to move the passive roller away from the active roller, and then controls the electric hoist to descend and clamp the head of the coiled steel bar to the steel bar clamp; 2) The electric hoist drives the steel bar to rise between the active roller and the passive roller, controls the electric hydraulic cylinder to make the passive roller close to the active roller to clamp the steel bar, and loosens the steel bar clamp; 3) The operation of the clamping motor drives the active roller to rotate and transport the steel bars upward. After the head of the steel bar hits the guide plate, it moves in an arc shape toward the top pulley; 4) When the steel bar head moves close to the clamp, clamp the steel bar head into the clamp; 5) The clamping and feeding mechanism and the steel feeding mechanism operate in tandem, driving the steel bar head downward to the bottom pulley; 6) Remove the steel bar from the clamping pliers, keep the clamping mechanism running, and manually guide the head of the steel bar to the subsequent rolling mill so that the steel bar bites into the rolling roller; after the steel bar bites into the rolling roller, the electric hydraulic cylinder of the clamping mechanism moves and the passive roller moves away from the active roller.

[0016] 7) Run the rolling mill. The steel bars are moved backwards by the power of the rolling mill for production. The steel bars pass through the wheel groove of the top pulley. The eccentric motor runs during production. The top pulley rotates around the power shaft and makes eccentric motion under the action of the eccentric motor. The eccentric motion causes the steel bars to be continuously pulled and released during the movement.

[0017] After describing the implementation mode of the present invention in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention, and the present invention is not limited to the implementation mode of the examples given in the specification.

Claims

1. A threading and feeding method in a cold rolling vertical feeding, the cold rolling vertical feeding comprising a feeding frame, a top pulley is installed on the upper part of the feeding frame, characterized in that: The top pulley is rotatably connected to a power shaft, the power shaft is located at the center of the pulley, the power shaft is fixedly connected to the output shaft of the eccentric motor, and the power shaft is not concentric with the output shaft of the eccentric motor; A threading device is installed on the feeding frame. When the threading operation starts, the steel bar is fed into the powered rolling mill by the threading device. The threading device includes an electric hoist installed on the upper part of the feeding frame. The lifting end of the electric hoist is fixedly connected with a steel bar clamp. A clamping and feeding mechanism is fixedly installed near the top pulley. A steel feeding mechanism is installed on the frame behind the top pulley. The clamping mechanism includes a clamping motor fixedly connected to the feeding frame, an active roller fixedly connected to the output shaft of the clamping motor, a passive roller is arranged in cooperation with the active roller, the active roller and the passive roller are located at the same horizontal height, the passive roller is rotatably mounted on a wheel frame, the wheel frame is slidably arranged on a track, the track is fixedly connected to the feeding frame, an electric hydraulic cylinder is fixedly connected to the feeding frame, the wheel frame is fixedly connected to the action end of the electric hydraulic cylinder, the hydraulic cylinder drives the passive roller to approach or move away from the active roller, an inclined guide plate is installed above the active roller, and the guide plate is inclined backward from bottom to top; The steel feeding mechanism comprises a guide rail fixedly connected to the frame, the guide rail is tilted backward from top to bottom, a slider is slidably installed on the guide rail, a clamp is fixedly installed on the slider, a passive sprocket and a driving sprocket are rotatably installed on the upper part of the guide rail, the driving sprocket is driven by power, a chain is wrapped around the driving sprocket and the passive sprocket, and the slider is fixedly connected to the chain; The threading and feeding methods are as follows: 1) At the beginning of production, the staff located on the upper part of the feeding frame controls the electric hydraulic cylinder to move the passive roller away from the active roller, and then controls the electric hoist to descend and clamp the head of the coiled steel bar to the steel bar clamp; 2) The electric hoist drives the steel bar to rise between the active roller and the passive roller, controls the electric hydraulic cylinder to make the passive roller close to the active roller to clamp the steel bar, and loosens the steel bar clamp; 3) The operation of the clamping motor drives the active roller to rotate and transport the steel bars upward. After the head of the steel bar hits the guide plate, it moves in an arc shape toward the top pulley; 4) When the steel bar head moves close to the clamp, clamp the steel bar head into the clamp; 5) The clamping and feeding mechanism and the steel feeding mechanism operate in tandem, driving the steel bar head downward to the bottom pulley; 6) Remove the steel bar from the clamping tongs, the clamping mechanism continues to operate, and the steel bar head is manually guided to the subsequent rolling mill so that the steel bar bites into the roller; after the steel bar bites into the roller, the electric hydraulic cylinder of the clamping mechanism moves and the passive roller moves away from the active roller; 7) Run the rolling mill. The steel bars are moved backwards by the power of the rolling mill for production. The steel bars pass through the wheel groove of the top pulley. The eccentric motor runs during production. The top pulley rotates around the power shaft and makes eccentric motion under the action of the eccentric motor. The eccentric motion causes the steel bars to be continuously pulled and released during the movement.

2. A threading and feeding method in a cold rolling vertical feeding according to claim 1, characterized in that: The active roller and the passive roller are located above and obliquely in front of the top pulley.

Images