A processing technique and processing device for cold-drawing round steel

Abstract

This invention discloses a processing technology for cold-drawn round steel, comprising the following steps: After horizontally hoisting the steel coil blank, the outside of the steel coil blank is wound with a first chain. Then, the steel wire binding around the steel coil blank is removed, allowing the steel coil blank to unfurl loosely. The width is then limited by the first chain. A crane then sequentially hoists the steel coil blank into various processing tanks for pickling, phosphating, and saponification processes. Next, the steel coil blank is fed into a steel coil bundling machine, where the steel wire around the C-shaped steel coil blank is re-bound. The first chain wrapped around the surface of the steel coil blank is then removed, and the steel coil blank is vertically hoisted onto a fixed fixture using slings. The steel coil blank, along with the fixed fixture, is then hoisted into a pit-type annealing furnace for annealing. Finally, the steel coil blank is hoisted into a wire drawing machine for cold drawing to obtain the finished round steel. This invention features good surface treatment and the steel coil blank is less prone to damage from crushing.

Description

TECHNICAL FIELD

[0001] The application relates to a processing technology of cold-drawn round steel, in particular to a processing technology and device of cold-drawn round steel. BACKGROUND

[0002] At present, the processing technology of cold-drawn round steel mainly comprises surface treatment, annealing and cold-drawing processes, specifically, a factory sends purchased steel coil blank materials into a surface treatment station through a hanger to sequentially perform pickling, phosphating and saponification processes, so that rust on the surface of the steel coil blank materials is removed and a phosphating film and a lubricating layer are formed; after the surface treatment of the steel coil blank materials is completed, the steel coil blank materials are transported into an annealing furnace for annealing treatment, and finally, the steel coil blank materials are placed into a wire drawing machine for drawing process to form finished cold-drawn round steel.

[0003] Firstly, the purchased steel coil blank materials are bundled by steel wires after leaving the factory, so that the round steel wire materials form a cylindrical shape after being wound, and the round steels are closely attached to each other, thereby facilitating the transportation of the factory. However, since the surface treatment process needs to ensure that the treatment liquid completely contacts the surface of the steel coil blank materials, the treatment liquid can penetrate into the gap between the adjacent wire materials and wrap them, so that if the tightly bundled steel coil blank materials are directly immersed into the treatment liquid, the immersion effect of the treatment liquid on the steel coil blank materials will be greatly reduced; if the steel wires on the surface of the steel coil blank materials are removed and the steel coil blank materials are placed into the treatment pool in a loose state, the width of the steel coil blank materials in the loose state is greater than the width of the treatment pool, that is, the steel coil blank materials cannot be directly placed into the treatment pool by hoisting.

[0004] Secondly, in order to improve the annealing efficiency of the steel coil blank materials, the factory will place multiple steel coil blank materials in the form of stacking up and down in the annealing furnace, so as to maximize the use of the height space of the annealing furnace. However, since the mass of each group of steel coil blank materials is large, when the steel coil blank materials are stacked up and down in the annealing furnace, the steel coil blank materials at the bottom of the annealing furnace will be subjected to a large pressure from the steel coil blank materials above, thereby easily causing the steel coil blank materials to be damaged under pressure during the annealing process. In addition, since the steel coil blank materials need to be loaded and unloaded by a crane during the annealing process, the conventional placing rack structure cannot be applied to the annealing furnace, thereby increasing the difficulty of supporting the steel coil blank materials individually.

[0005] Therefore, the existing processing technology of cold-drawn round steel has the problems of poor surface treatment effect and easy damage of the steel coil blank materials during annealing. SUMMARY

[0006] The application aims to provide a processing technology and device of cold-drawn round steel.

[0007] The technical scheme of the present application is a processing technology of cold-drawing round steel, comprising the following steps:

[0008] ①A steel coil blank is horizontally lifted by a crane through a lifting bracket, and then the outside of the steel coil blank is wound by a first chain, to obtain A steel coil blank;

[0009] ②The steel wires around A steel coil blank are removed, so that A steel coil blank is loosely unfolded towards both ends after losing the restraint of the steel wires, and the first chain is used to limit the width of A steel coil blank after unfolding, to obtain B steel coil blank;

[0010] ③B steel coil blank is lifted into each treatment tank by the crane to sequentially perform pickling, phosphating and saponification processes, so that rust on the surface of B steel coil blank is removed and a phosphating film and a lubricating layer are formed, to obtain C steel coil blank;

[0011] ④C steel coil blank is sent into a steel coil strapping machine, and the steel wires around C steel coil blank are re-strapped by the steel coil strapping machine, the steel wires and the first chain are circumferentially misaligned with each other, to obtain D steel coil blank;

[0012] ⑤The first chain wound on the surface of D steel coil blank is removed, and D steel coil blank is vertically lifted into a fixed tool through a lifting belt, to obtain E steel coil blank;

[0013] ⑥E steel coil blank is lifted into an shaft-type annealing furnace together with the fixed tool, and each E steel coil blank is stacked up and down in the shaft-type annealing furnace through mutual buckling of the fixed tool to perform annealing, to obtain F steel coil blank;

[0014] ⑦F steel coil blank is lifted into a wire drawing machine to perform cold-drawing treatment, to obtain finished round steel;

[0015] The width of each treatment tank in step ③ is consistent, and the limiting width of the first chain in step ② is greater than the restraint width of the steel wires and less than the width of the treatment tank.

[0016] A processing device used in the processing technology of cold-drawing round steel is provided, comprising waiting station, surface treatment station, strapping station, shaft-type annealing furnace and wire drawing machine arranged in sequence, the strapping station and the shaft-type annealing furnace are connected with each other through a transfer trolley, the waiting station, the surface treatment station, the strapping station and the transfer trolley are provided with a crane above, the crane is connected with a lifting bracket for suspending a steel coil blank, the outside of the lifting bracket is provided with a first chain for strapping the steel coil blank, one end of the first chain is connected with the middle of the other end of the first chain through a shackle, the waiting station is provided with a blocking column, one side of the blocking column is provided with a bolt for detachably connecting the first chain, the outside of the blocking column is provided with a tensioning assembly, the tensioning assembly is provided with a fixed part for detachably connecting the first chain, the lifting bracket comprises a lifting beam located at the top of the steel coil blank, the lifting beam is provided with symmetrical vertical plates on both sides, the lower end of the vertical plate is provided with a placing opening, and the placing openings on both sides are connected with each other through a support rod.

[0017] The tensioning assembly of the foregoing processing device comprises a rack, a horizontal telescopic rod connected to the rack, and a fixed portion at the end of the telescopic rod extending towards the blocking column.

[0018] The foregoing processing device, the lifting beam extends to the outside of the vertical plate at both ends, and a hanging plate is connected to the upper end of the lifting beam, the middle part of the hanging plate is provided with a lifting hole, and the two ends of the hanging plate are respectively welded to the two vertical plates.

[0019] The foregoing processing device, the surface treatment station comprises an elongated processing workshop, and the two ends of the processing workshop are provided with curtains, and the processing workshop is provided with acid pickling tanks, first cleaning tanks, first draining tanks, phosphating tanks, second cleaning tanks, second draining tanks and saponification tanks connected in sequence; the widths of the acid pickling tanks, the first cleaning tanks, the first draining tanks, the phosphating tanks, the second cleaning tanks, the second draining tanks and the saponification tanks are the same, and are greater than the interval distance of the two vertical plates.

[0020] The foregoing processing device, the two sides of the first cleaning tank are provided with a plurality of cleaning pipes arranged side by side in the vertical direction, a plurality of spray heads are arranged side by side in the horizontal direction on each cleaning pipe, and the bottom of the first cleaning tank is provided with two rotating pipes arranged symmetrically.

[0021] The foregoing processing device, the bundling station comprises a steel coil bundling machine, the bottom of the steel coil bundling machine is provided with a lifting type conveying trolley, one side of the steel coil bundling machine is provided with a rotating roller group, an opening is formed in the middle of the rotating roller group for the conveying trolley to pass through, the rotating roller group is provided with a support on the side away from the steel coil bundling machine, a retractable cylinder is rotatably connected to the top of the support, a driving motor is connected to the outside of the retractable cylinder, a second lock chain is connected to the middle of the retractable cylinder, a first spring buckle is connected to the end of the second lock chain, a cross bar connected to the support is arranged below the retractable cylinder, and a second spring buckle is arranged at the end of the first lock chain away from the release buckle.

[0022] The foregoing processing device, the fixed tooling for supporting the steel coil blank in the pit-type annealing furnace comprises a sleeve, a gas passage is arranged in the middle of the sleeve, a plurality of first air permeable holes are distributed around the side wall of the sleeve, a support plate is arranged at the bottom of the sleeve, a plurality of second air permeable holes are distributed on the support plate, a clamping portion is arranged at the top of the sleeve, and the clamping portions and the gas passages of adjacent sleeves are mutually clamped.

[0023] The foregoing processing device, the clamping portion is in the shape of a cylinder, the outer diameter of the clamping portion is consistent with the inner diameter of the gas passage, and a receiving portion is formed between the clamping portion and the sleeve.

[0024] The foregoing processing device, the clamping portion is in the shape of a cylinder, the outer diameter of the clamping portion is consistent with the inner diameter of the gas passage, and a receiving portion is formed between the clamping portion and the sleeve.

[0025] Compared with the prior art, the present application has the following characteristics:

[0026] (1) The first lock chain is wound outside the steel coil blank, so that the width of the steel coil blank can be adjusted and limited, and the width of the steel coil blank after being re-bundled by the first lock chain is slightly smaller than the width of the processing pool. Under the action of the structure, the present application can remove the iron wire bundled on the surface of the steel coil blank, change the steel coil blank from a tight state to a relatively loose state, limit the width of the steel coil blank after loosening, and match the size of the processing pool, thereby realizing stable hoisting, maximizing the contact area of the processing liquid on the surface of the steel coil blank, and improving the processing effect;

[0027] (2) On the basis of the above, the present application limits one end of the steel coil blank by the stop column and pulls the first lock chain by the tensioning assembly, so that the first lock chain can drive the steel coil blank to shrink to a specified width after being pulled, and the first lock chain is conveniently connected at the head and tail. By limiting the positions of the pin and the tensioning assembly, the first lock chain can be connected at the head and tail in a relaxed state during the pulling process, thereby reducing the connection difficulty of the first lock chain for the operator, effectively reducing the stress expansion of the first lock chain after the pulling is released, improving the width control stability of the steel coil blank after the lock chain is wound, and avoiding the steel coil blank from being reopened after losing the pulling;

[0028] (3) Through the structural cooperation of the rotating roller group and the contraction cylinder, the first lock chain on the steel coil blank can be rotated to be close to the contraction cylinder by the rotating roller group after the steel coil blank is hoisted to the rotating roller group, and then the second lock chain on the contraction cylinder is connected to the end of the first lock chain through the first spring buckle. After the operator releases the buckle, the first lock chain can be separated from the steel coil blank by the contraction cylinder after being rotated, thereby realizing the dismounting function of the first lock chain. On this basis, through the cooperation of the cross rod and the second spring buckle, when the first lock chain is taken out, the end of the lifting belt can be connected to the end of the first lock chain through the second spring buckle, and the other end of the lifting belt is hooked on the cross rod, so that the lifting belt can be wound on the surface of the steel coil blank when the first lock chain is taken out, thereby realizing the installation of the lifting belt on the steel coil blank and facilitating the hoisting of the operator;

[0029] (4) Through the cooperation of the processing workshop and the screen, each processing pool can be arranged in the processing workshop, and the peculiar smell emitted in the processing pool can be intercepted by the processing workshop and the screen, thereby reducing the emission of the peculiar smell. Through the cooperation of the cleaning pipe and the rotating pipe, the steel coil blank in the first cleaning pool can be automatically cleaned, thereby reducing the peculiar smell overflow caused by manual cleaning, and improving the cleaning effect on the surface of the steel coil blank.

[0030] (5)The sleeve, the supporting plate and the clamping part are matched, so that the fixed tool is placed to be stacked in sequence along the vertical direction and buckled with each other, so that the steel coil blank can be first sleeved outside the sleeve, and then the sleeve is buckled into the fixed tool in the annealing furnace through hoisting, so that the steel coil blanks are overlapped and fixed, the utilization of the height space in the annealing furnace is realized; during annealing, each supporting plate can support the steel coil blank alone and prevent the upper fixed tool from pressing the steel coil blank, so that the structural stability of the steel coil blank is improved;

[0031] Therefore, the steel coil blank is not easy to be damaged. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic diagram of the present application;

[0033] Figure 2 is a structural schematic diagram of the present application when the first chain is installed;

[0034] Figure 3 is a structural schematic diagram of the steel coil blank after winding the first chain;

[0035] Figure 4 is a structural schematic diagram of the first cleaning pool and the first draining pool;

[0036] Figure 5 is a cross-sectional view of the steel coil blank in the first cleaning pool;

[0037] Figure 6 is a structural schematic diagram of the steel coil blank on the rotating roller group;

[0038] Figure 7 is a structural schematic diagram of the first chain when being extracted;

[0039] Figure 8 is a structural schematic diagram of the steel coil blank after being re-bundled and wound with a sling;

[0040] Figure 9 is a structural schematic diagram of the fixed tool;

[0041] Figure 10 is a top view of the fixed tool;

[0042] Figure 11 is a structural schematic diagram of the fixed tool after being stacked up and down.

[0043] The marks in the drawings are: 1-transport trolley, 2-crane, 3-hanging bracket, 4-first lock chain, 5-block column, 6-latch, 7-fixing part, 8-rack, 9-telescopic rod, 10-processing workshop, 11-curtain, 12-acid pickling tank, 13-first cleaning tank, 14-first water draining tank, 15-phosphating tank, 16-second cleaning tank, 17-second water draining tank, 18-saponification tank, 19-cleaning pipe, 20-sprayer, 21-rotating pipe, 22-conveying trolley, 23-rotating roller group, 24-opening, 25-bracket, 26-contracting cylinder, 27-second lock chain, 28-first spring buckle, 29-cross bar, 30-fixing tool, 31-second spring buckle, 301-hoisting beam, 302-vertical plate, 303-placing opening, 304-supporting rod, 305-hanging plate, 306-hoisting hole, 3001-sleeve, 3002-air vent, 3003-first air vent, 3004-supporting plate, 3005-second air vent, 3006-engaging part, 3007-accepting part, 3008-hanging plate. DETAILED DESCRIPTION

[0044] The application will be further described below in connection with the drawings and examples, but it is not limited to the basis of the application.

[0045] Example. A processing technology of cold-drawn round steel, comprising the following steps:

[0046] ①The steel coil blank is horizontally hoisted by the crane through the hanging bracket, and then the outer part of the steel coil blank is wound by the first lock chain, to obtain A steel coil blank;

[0047] ②The steel wires around the A steel coil blank are removed, so that the A steel coil blank is loosely expanded towards both ends after losing the restraint of the steel wires, and the first lock chain replaces the steel wires to limit the width of the A steel coil blank after expansion, to obtain B steel coil blank;

[0048] ③The B steel coil blank is hoisted into each treatment tank by the crane to sequentially perform acid pickling, phosphating and saponification processes, so that the rust on the surface of the B steel coil blank is removed and a phosphating film and a lubricating layer are generated, to obtain C steel coil blank;

[0049] ④The C steel coil blank is sent into a steel coil strapping machine, and the steel wires around the C steel coil blank are re-strapped by the steel coil strapping machine, and the steel wires and the first lock chain are circumferentially misaligned with each other, to obtain D steel coil blank;

[0050] ⑤The first lock chain wound on the surface of the D steel coil blank is removed, and the D steel coil blank is vertically hoisted into the fixing tool through the lifting belt, to obtain E steel coil blank;

[0051] ⑥The E steel coil blank is hoisted into the shaft-type annealing furnace together with the fixing tool, and the E steel coil blanks are stacked up and down in the shaft-type annealing furnace through the mutual buckling of the fixing tools to perform annealing, to obtain F steel coil blank;

[0052] ⑦F steel coil blank is hoisted into the wire drawing machine to carry out cold drawing treatment, and finished round steel is obtained;

[0053] The width of each treatment pool in the step ③ is consistent, and the limiting width of the first chain in the step ② is greater than the binding width of the steel wire and less than the width of the treatment pool.

[0054] Based on the processing device used in the processing technology of the cold-drawn round steel, it is composed of Figure 1 As shown in the figure, it comprises waiting station, surface treatment station, bundling station, pit-type annealing furnace and wire drawing machine arranged in sequence, wherein the pit-type annealing furnace and the wire drawing machine are existing processing equipment for cold-drawn round steel, the pit-type annealing furnace and the wire drawing machine are located in separate factory buildings and are far away from the waiting station, the surface treatment station and the bundling station, the bundling station and the pit-type annealing furnace are connected with each other through the transfer trolley 1, the waiting station, the surface treatment station, the bundling station and the transfer trolley 1 are arranged side by side in a straight line and are provided with the travelling crane 2 penetrating above, the travelling crane 2 is connected with the hanger 3 for suspending the steel coil blank, the outer part of the hanger 3 is provided with the first chain 4 for bundling the steel coil blank, one end of the first chain 4 is connected with the middle part of the other end of the first chain 4 through the shackle, and the first chain 4 is arranged at the top and the bottom of the steel coil blank respectively; the waiting station is provided with the blocking column 5, one side of the blocking column 5 is in close contact with the steel coil blank, one side of the blocking column 5 is provided with the bolt 6 which can detachably connect the first chain 4, the bolt 6 is L-shaped in appearance, one end of the bolt 6 is screwed into the blocking column 5 after penetrating through the first chain 4, the outer side of the blocking column 5 is provided with the tensioning assembly, the tensioning assembly is located on the side of the blocking column 5 away from the steel coil blank along the transverse position, and the tensioning assembly is provided with the fixed part 7 which can detachably connect the first chain 4, and the fixed part 7 can be a U-shaped ring;

[0055] The hanger 3 comprises the hoisting beam 301 located at the top of the steel coil blank, the hoisting beam 301 is a circular tube, the two sides of the hoisting beam 301 are provided with symmetrical vertical plates 302, the vertical plates 302 are plate structures and are arranged perpendicularly to the hoisting beam 301 and are welded, the lower end of the vertical plate 302 is provided with the placing opening 303, one end of the placing opening 303 is inclined upward and is in communication with the outside, and the two placing openings 303 are connected with each other through the support rod 304.

[0056] The tensioning assembly comprises the rack 8, the horizontal telescopic rod 9 is connected to the rack 8, the telescopic rod 9 can be an electric push rod or an oil cylinder, and the end of the telescopic rod 9 extends towards the blocking column 5 and is connected with the fixed part 7.

[0057] The two ends of the hoisting beam 301 extend to the outside of the vertical plate 302, the upper end of the hoisting beam 301 is connected with the hanging plate 305, the middle part of the hanging plate 305 is provided with the hoisting hole 306, and the two ends of the hanging plate 305 are welded with the two vertical plates 302 respectively.

[0058] The width of the steel coil blank after being wound by the first chain 4 is not greater than the interval distance of the two vertical plates 302.

[0059] The surface treatment station comprises a long strip-shaped processing workshop 10, both ends of the processing workshop 10 are provided with curtains 11, and the processing workshop 10 is provided with an acid pickling tank 12, a first cleaning tank 13, a first draining tank 14, a phosphating tank 15, a second cleaning tank 16, a second draining tank 17 and a saponification tank 18 connected in sequence; the acid pickling tank 12, the first cleaning tank 13, the first draining tank 14, the phosphating tank 15, the second cleaning tank 16, the second draining tank 17 and the saponification tank 18 have the same width, and the width is greater than the interval distance of the two vertical plates 302.

[0060] The second cleaning tank 16 is filled with cleaning water, and the second cleaning tank 16 is connected with a water inlet pipe and a water outlet pipe at both ends, so that the cleaning water in the second cleaning tank 16 is replaced regularly, and the steel coil blank is soaked in the cleaning water to remove the phosphating agent on the surface of the steel coil blank.

[0061] A plurality of cleaning pipes 19 are arranged side by side in the vertical direction at both sides of the first cleaning tank 13, a plurality of spray heads 20 are arranged side by side in the horizontal direction on each cleaning pipe 19, and the bottom of the first cleaning tank 13 is provided with two rotating pipes 21 arranged symmetrically.

[0062] Both ends of the hoisting beam 301 extend to the outside of the vertical plate 302 and form a lifting part, and the two sides of the first cleaning tank 13 are provided with a lifting seat matched with the lifting part.

[0063] The bundling station comprises a steel coil bundling machine, which is a conventional bundling device for steel wire coils, the bottom of the steel coil bundling machine is provided with a lifting type conveying trolley 22, the conveying trolley 22 is arranged in matching with the steel coil bundling machine, and is used for conveying the steel coil blank into or out of the steel coil bundling machine, one side of the steel coil bundling machine is provided with a rotating roller group 23, the middle part of the rotating roller group 23 forms an opening 24 for the conveying trolley 22 to pass through, the rotating roller group 23 is provided with a support 25 at the side away from the steel coil bundling machine, the top of the support 25 is rotatably connected with a shrinkable cylinder 26, the outer part of the shrinkable cylinder 26 is connected with a driving motor, the middle part of the shrinkable cylinder 26 is connected with a second chain 27, the end part of the second chain 27 is connected with a first spring buckle 28, and the lower part of the shrinkable cylinder 26 is provided with a cross bar 29 connected with the support 25, and the end part away from the release buckle of the first chain 4 is provided with a second spring buckle 31.

[0064] The rotating roller group 23 comprises two rotating rollers arranged side by side, the two rotating rollers are drivingly connected at the end parts, the outer part of one of the rotating rollers is connected with a rotating motor, and the opening 24 is formed between the two rotating rollers.

[0065] The well type annealing furnace is provided with a fixing tool 30 for supporting the steel coil blank, the fixing tool 30 comprises a sleeve 3001, the middle part of the sleeve 3001 is provided with a gas passing hole 3002, a plurality of first gas passing holes 3003 are distributed around the side wall of the sleeve 3001, the bottom of the sleeve 3001 is provided with a supporting plate 3004, the supporting plate 3004 and the sleeve 3001 are vertically arranged and integrally formed, a plurality of second gas passing holes 3005 are distributed on the supporting plate 3004, the top of the sleeve 3001 is provided with a clamping part 3006, the clamping part 3006 and the gas passing hole 3002 are mutually buckled through the clamping part 3006 and the gas passing hole 3002 between adjacent sleeves 3001.

[0066] The clamping part 3006 is in the shape of a cylinder, the outer diameter of the clamping part 3006 is consistent with the inner diameter of the gas passing hole 3002, and the clamping part 3006 and the sleeve 3001 form a receiving part 3007.

[0067] The receiving part 3007 is in the shape of a circular truncated cone.

[0068] The top of the clamping part 3006 is provided with a hanging plate 3008 located in the gas passing hole 3002, the hanging plate 3008 is in the shape of a straight line, the end of the hanging plate 3008 and the inner wall of the clamping part 3006 are connected with each other, and the connection position is arranged to be mutually staggered with the first gas passing hole 3003.

[0069] When the transfer trolley 1 transfers the steel coil blank, the fixing tool 30 can be directly placed on the transfer trolley 1, and the steel coil blank can be vertically placed on the fixing tool 30 through the crane, so that the fixing tool 30 can be directly lifted into the well type annealing furnace by the crane on the other side after the transfer trolley 1 is transferred. When the steel coil blank needs to be stacked in the warehouse, the operator can horizontally place the steel coil blank on the transfer trolley 1, so that the other crane can conveniently stack the steel coil blank.

[0070] The working principle of the present application is as follows: in use, the steel coil blank in the tightened state is horizontally placed on the ground, then the lifting frame 3 is lowered by the crane 2, the two vertical plates 302 are moved to the outer sides of the two ends of the steel coil blank, and the placing opening 303 is located outside the inner hole of the steel coil blank. After the lifting beam 301 is in place, the supporting rod 304 is transversely inserted through the steel coil blank, and the two ends of the supporting rod 304 are respectively buckled into the placing opening 303 on one side, so that the supporting rod 304 is stably inserted through the steel coil blank and placed on the two vertical plates 302.

[0071] After the hanger 3 is installed, the steel coil blank is hoisted to the air by the crane 2, and the bottom end of the steel coil blank is attached to the stop post 5. After the steel coil blank is in place, the latch 6 is inserted into the middle of one side of the first chain 4, and the stop post 5 is connected, leaving a length for the first chain 4 to hang freely, so that the end of the first chain 4 can hang below one side of the steel coil blank. After the first chain 4 is fixed at one end, the other end is wrapped around the bottom of the steel coil blank in a C shape and connected to the fixed part 7 through the second spring buckle 31, so that the contraction of the telescopic rod 9 can pull the first chain 4 and bundle the steel coil blank.

[0072] After the first chain 4 is installed in place, the steel wire wrapped around the steel coil blank is cut by the operator, so that the steel coil blank changes from a tight state to a loose state after losing the restraint of the steel wire, and expands to the side away from the stop post 5, causing the first chain 4 to open. After the steel coil blank is spread out, the telescopic rod 9 pulls the end of the first chain 4 outward, so that the first chain 4 bundles the steel coil blank after moving; the operator can adjust the contraction amount of the telescopic rod 9 according to the width of the processing pool, so that the width of the steel coil blank after contraction is slightly smaller than the width of the processing pool. After the first chain 4 is pulled into place, the operator connects the end of the first chain 4 in a free hanging state to the first chain 4 directly below through the release buckle, so that the two ends of the first chain 4 are connected head to tail and bundle and limit the width of the steel coil blank. Finally, the fixed part 7 and the first chain 4 are separated from each other, and then the latch 6 is removed to separate the first chain 4 and the stop post 5 from each other, completing the bundling. After the first chain 4 is bundled, the operator bundles the other side of the steel coil blank through the first chain 4 in the same way.

[0073] After the steel coil raw material is banded, the crane 2 hoists the steel coil raw material into the pickling tank 12, the first cleaning tank 13, the first draining tank 14, the phosphating tank 15, the second cleaning tank 16, the second draining tank 17 and the saponification tank 18 in sequence to complete the pickling, phosphating and saponification processes. When the steel coil raw material is hoisted into the first cleaning tank 13, the lifting part is first buckled into the lifting seat, so that the lifting seat limits the hoisting position of the steel coil raw material. When the bottom surface of the steel coil raw material falls into contact with the rotating pipe 21, the crane 2 continues to drive the lifting frame 3 to move downward, so that the lifting part moves downward and comes into contact with the top plane of the first cleaning tank 13. When the lifting frame 3 is placed in position, the upper end of the steel coil raw material is separated from the supporting rod 304 and keeps a gap with the bottom surface of the hoisting beam 301, that is, the steel coil raw material and the lifting frame 3 are completely separated in this state. After the lifting frame 3 falls into position, the rotating pipe 21 drives the steel coil raw material to rotate slowly after synchronous rotation, and the nozzles 20 around the steel coil raw material are used to wash different positions of the steel coil raw material. During the washing process, the washing position of the nozzles 20 can be changed with the rotation, so that the washing effect is improved. After the steel coil raw material is washed, it is hoisted into the first draining tank 14 and kept in a stationary state, so that the water on the surface of the steel coil raw material falls into the first draining tank 14 during the stationary process, thereby reducing the water attached to the surface of the steel coil raw material and avoiding the dilution of the subsequent treatment agent.

[0074] After the surface treatment of the steel coil raw material is completed, the crane 2 hoists the steel coil raw material to the rotating roller group 23, and then the conveying trolley 22 moves to the opening 24 of the rotating roller group 23 and is lifted upward to support the steel coil raw material, so that the steel coil raw material is separated from the rotating roller group 23. After the conveying trolley 22 lifts the steel coil raw material, it is transversely moved into the steel coil bender, and the steel coil bender is used to band the steel wire or the strap around the steel coil raw material, so that the steel coil raw material in a loose state is re-banded firmly, and the banded position is manually adjusted to be misaligned with the first chain 4. After the steel coil raw material is banded, the conveying trolley 22 places the steel coil raw material on the rotating roller group 23 in the same way. Then the rotating roller group 23 rotates the first chain 4 to the side close to the contraction cylinder 26. After the steel coil raw material is rotated into position, the operator connects one end of the second chain 27 to one end of the first chain 4 through the first spring buckle 28, then hooks one end of the lifting belt to the horizontal rod 29, and fixes the other end of the lifting belt to the other end of the first chain 4 through the second spring buckle 31. After the lifting belt is connected, the operator removes the unloading buckle on the first chain 4 and opens the contraction cylinder 26, so that the contraction cylinder 26 extracts the first chain 4 after rotation, and the lifting belt is wound on the steel coil raw material with the extraction of the first chain 4.

[0075] When the first chain 4 is completely removed, the operator removes the two ends of the sling from the first chain 4 and the crossbar 29 respectively, and then nests them to complete the bundling. Then the operator removes the remaining first chains 4 in the same way, and the sling does not need to be installed during the removal process. When the first chain 4 on the steel coil blank is removed, the lifting ring of the sling is located at the end of the steel coil blank, and the operator can hang the lifting ring on the hook of the crane 2, and rotate the lifting ring to the top through the roller group 23, and then lift the steel coil blank directly through the crane 2 and place it vertically on the fixed tooling 30 of the transfer trolley 1, so as to facilitate the subsequent work station to lift the steel coil blank together with the fixed tooling 30 into the shaft annealing furnace. If the steel coil blank needs to be transported in a horizontal state, the operator can rotate the lifting ring to the middle position horizontally after winding the sling, so that the crane 2 can make the steel coil blank in a horizontal state during lifting, facilitating the stacking of the steel coil blank.

[0076] When the steel coil blank is stacked in the shaft annealing furnace, the operator can set the upper fixed tooling 30 on the clamping portion 3006 of the lower fixed tooling through the air hole 3002, and use the clamping portion 3006 and the air hole 3002 to overlap and interlock the two. After the fixed tooling 30 is placed, the receiving portion 3007 of the lower fixed tooling can support the upper fixed tooling 30, thereby effectively preventing the steel coil blank from being pressed together during stacking, and ensuring the structural stability and annealing effect of the steel coil blank. After the steel coil blank is annealed, the operator lifts it out and places it into the wire drawing machine, thereby realizing cold drawing forming of the steel coil blank.

Claims

1. A processing technology for cold-drawn round steel, characterized in that, Includes the following steps: ①The steel coil billet is horizontally lifted by the crane via the gantry crane, and then the outside of the steel coil billet is wound by the first chain to obtain steel coil billet A; ② Remove the steel wires binding the steel coil blank A around its perimeter, allowing the steel coil blank A to loosely unfold towards both ends after being freed from the steel wires. Then, replace the steel wires with the first chain to limit the width of the steel coil blank A after it unfolds, thus obtaining steel coil blank B. ③The B steel coil billet is hoisted into each processing pool by a crane to carry out pickling, phosphating and saponification processes in sequence, thereby removing the rust on the surface of the B steel coil billet and generating a phosphating film and a lubricating layer to obtain the C steel coil billet. ④ Feed the C steel coil blank into the steel coil bundling machine, and the steel coil bundling machine re-bundles the steel wires around the C steel coil blank. The steel wires and the first chain are staggered in the circumferential direction to obtain the D steel coil blank. ⑤ Remove the first chain wrapped around the surface of the D steel coil blank, and vertically hoist the D steel coil blank into the fixed fixture using slings to obtain the E steel coil blank; ⑥ The E steel coil billets, together with the fixing fixtures, are hoisted into the pit-type annealing furnace. The E steel coil billets are stacked up and down in the pit-type annealing furnace for annealing by interlocking the fixing fixtures to obtain the F steel coil billets. ⑦ The F-steel coil billet is hoisted into the wire drawing machine for cold drawing to obtain the finished round steel. In step ③, the width of each treatment pool is the same, and in step ②, the limiting width of the first chain is greater than the binding width of the steel wire and less than the width of the treatment pool. The processing technology is carried out by a processing device, which includes a waiting station, a surface treatment station, a bundling station, a pit annealing furnace, and a wire drawing machine arranged in sequence. The bundling station and the pit annealing furnace are connected to each other by a transfer trolley (1). A crane (2) is provided above the waiting station, the surface treatment station, the bundling station, and the transfer trolley (1). A hanger (3) for suspending steel coil blanks is connected to the crane (2). A first chain (4) for bundling steel coil blanks is provided on the outside of the hanger (3). One end of the first chain (4) is connected to the first chain (4) by a shackle. 4) The other end of the middle; the waiting station is provided with a stop post (5), and a pin (6) for a detachable first chain (4) is provided on one side of the stop post (5). A tensioning component is provided on the outside of the stop post (5), and a fixing part (7) for a detachable connection to the first chain (4) is provided on the tensioning component; the hanger (3) includes a lifting beam (301) located at the top of the steel coil blank. Symmetrical vertical plates (302) are provided on both sides of the lifting beam (301). A placement opening (303) is provided at the lower end of the vertical plate (302). The two placement openings (303) are connected to each other by a support rod (304); The hoisting beam (301) extends to the outside of the vertical plate (302) at both ends. The upper end of the hoisting beam (301) is connected to a hanging plate (305). The middle part of the hanging plate (305) is provided with a hoisting hole (306). The two ends of the hanging plate (305) are welded to the two vertical plates (302) on both sides respectively. The surface treatment station includes a long processing workshop (10), with curtains (11) at both ends of the processing workshop (10). The processing workshop (10) is equipped with pickling tank (12), first cleaning tank (13), first draining tank (14), phosphating tank (15), second cleaning tank (16), second draining tank (17) and saponification tank (18) connected in sequence. The pickling tank (12), first cleaning tank (13), first draining tank (14), phosphating tank (15), second cleaning tank (16), second draining tank (17) and saponification tank (18) have the same width, which is greater than the interval between the two vertical plates (302). The bundling station includes a steel coil bundling machine. The bottom of the steel coil bundling machine is equipped with a lifting conveyor trolley (22). A rotating roller group (23) is provided on one side of the steel coil bundling machine. An opening (24) is formed in the middle of the rotating roller group (23) for the conveyor trolley (22) to pass through. A bracket (25) is provided on the side of the rotating roller group (23) away from the steel coil bundling machine. A shrink tube (26) is rotatably connected to the top of the bracket (25). A drive motor is connected to the outside of the shrink tube (26). A second chain (27) is connected to the middle of the shrink tube (26). A first spring buckle (28) is connected to the end of the second chain (27). A crossbar (29) connecting the bracket (25) is provided below the shrink tube (26). A second spring buckle (31) is provided at the end of the first chain (4) away from the shackle.

2. The processing technology for cold-drawn round steel according to claim 1, characterized in that: The tensioning assembly includes a frame (8), on which a horizontal telescopic rod (9) is connected. The end of the telescopic rod (9) extends toward the stop post (5) and is connected to the fixing part (7).

3. According to the processing technology of cold-drawn round steel according to claim 1, multiple cleaning pipes (19) are arranged side by side in the vertical direction on both sides of the first cleaning tank (13), and multiple nozzles (20) are arranged side by side in the horizontal direction on each cleaning pipe (19). Two rotating pipes (21) are arranged symmetrically at the bottom of the first cleaning tank (13).

4. According to the processing technology of cold-drawn round steel according to claim 1, the pit-type annealing furnace is provided with a fixing fixture (30) for supporting the steel coil billet. The fixing fixture (30) includes a sleeve (3001), a vent hole (3002) is provided in the middle of the sleeve (3001), a plurality of first vent holes (3003) are distributed around the side wall of the sleeve (3001), a support plate (3004) is provided at the bottom of the sleeve (3001), a plurality of second vent holes (3005) are distributed on the support plate (3004), and a locking part (3006) is provided at the top of the sleeve (3001). Adjacent sleeves (3001) are fastened to each other through the locking part (3006) and the vent hole (3002).

5. According to the processing technology of cold-drawn round steel according to claim 4, the outer shape of the locking part (3006) is cylindrical, the outer diameter of the locking part (3006) is the same as the inner diameter of the air vent (3002), and a receiving part (3007) is formed between the locking part (3006) and the sleeve (3001).

6. The processing technology for cold-drawn round steel according to claim 4, characterized in that: The top of the engaging part (3006) is provided with a hanging plate (3008) located in the air vent (3002). The hanging plate (3008) is in the shape of a straight line, and the end of the hanging plate (3008) is connected to the inner wall of the engaging part (3006).

Images