CN113649520A - Chain knitting machine and chain knitting method for forming large chain - Google Patents

Abstract

The invention discloses a large chain forming and chaining machine. The chain knitting method and device which can be suitable for flexible knitting of chains of wires with different diameters, and are low in equipment preparation and maintenance cost and high in production efficiency are urgently required. The feeding device adopts horizontal and vertical straightening, a servo motor drives a plurality of driving wheels to intermittently feed, the cutting device breaks a hole in advance and then cuts materials, the materials are conveyed to a forming station by the feeding device, and the forming mechanism realizes preforming, lantern ring and complete forming. The invention adopts the hydraulic cylinder and the servo motor to control, greatly reduces the loss of a transmission chain and energy, realizes flexible knitting suitable for wires with different diameters by adopting a mode of cutting off and forming two procedures, and simultaneously realizes one-step forming of chain links by adopting the design of a forming mechanism.

Description

Chain knitting machine and chain knitting method for forming large chain

Technical Field

The invention belongs to the technical field of chain processing, and particularly relates to a large chain forming and chaining machine.

Background

The chain is formed by a chain of chain links which are buckled one by one to form a chain link of strip metal. It is used for mechanical transmission and traction. The chain is divided into a transmission chain; a conveyor chain; pulling the chain; special professional chains, etc. The invention mainly focuses on the large chain knitting manufacturing process.

The chain knitting process is roughly divided into: straightening; automatic intermittent feeding; cutting off; bending; and (4) automatic connection.

At present, the main modes for the chain knitting process are as follows: the first semi-automatic chain knitting, straightening and cutting process is completed in advance, and workers complete intermittent feeding, control the punch of the chain knitting machine to move up and down to complete chain bending and complete one-by-one connection. The labor intensity is high, the danger degree is high, the automation degree is low, the equipment integration degree is low, and the method is not suitable for a modern processing mode any more. The second cam transmission type chaining machine can complete the chain knitting process, but the equipment is driven by a pure mechanical type, so that the size is large, the transmission process is complex, and the noise generated by the impact of the cam transmission on the core rod is large. When chains of different models are produced, the whole set of forming mechanism is replaced, and the time cost is huge.

Therefore, the design of a novel chain knitting machine which can complete the chain knitting process and overcome the defects of the traditional chain knitting machine is an urgent need for the development of the chain processing field in China.

Disclosure of Invention

The invention aims to provide a large chain forming and chaining machine with a simple structure, which can realize automatic procedures such as straightening, automatic intermittent feeding, cutting, bending, automatic connection and the like. Meanwhile, the transmission mode is changed, the product is replaced without replacing the forming equipment, the production cost is low, and the production efficiency is improved.

The invention relates to a large chain forming and chaining machine, which comprises a rack, a feeding mechanism, a cutting mechanism, a feeding mechanism and a forming mechanism.

The feeding mechanism comprises a feeding hole, a horizontal straightening base, a vertical straightening base, a fixed shaft, a straightening wheel, a driving gear box, a pressing adjusting handle and a straightening driving motor. The feeding hole is fixed on the horizontal straightening base and plays a role in limiting and guiding the wire; the horizontal straightening base and the vertical straightening base are fixed on the frame; the straightening wheels are fixed on the horizontal straightening base and the vertical straightening base by a fixed shaft; the output shaft of the straightening driving motor is connected with the input shaft of the driving paper wheel box; the driving wheel is connected with an output shaft of the driving gear box; the pressing adjusting handle is fixed above the driving gear box, and the distance between the driving wheels is adjusted to adapt to wires with different diameters.

Preferably, the feeding hole, the straightening wheel and the driving wheel are arranged on the same straight line for reserving paths for the wire.

Preferably, the straightening wheels are arranged in groups of five, and the groups of the straightening wheels are arranged on the horizontal straightening base and the vertical straightening base respectively, so as to finish the horizontal straightening and the vertical straightening of the wire.

The cutting mechanism comprises a cutting hydraulic cylinder, a cutting knife arm, a cutting seat, a cutting pin shaft, a supporting pin shaft crevasse hydraulic cylinder, a crevasse hydraulic cylinder seat, a crevasse connecting rod, an upper crevasse seat, a lower crevasse seat, a crevasse pin shaft and a crevasse knife; the crevasse hydraulic cylinder is fixed on the frame; the crevasse connecting rod connects the crevasse hydraulic cylinder with the upper crevasse tool apron and the lower crevasse tool apron in a hinge mode and transmits power; the crevasse pin shaft is fixed on the crevasse hydraulic cylinder seat and forms a rotating pair of a composite hinge together with the upper crevasse tool apron and the lower crevasse tool apron; the two crevasse knives are a group and symmetrically fixed on the upper crevasse knife holder and the lower crevasse knife holder. The cutting hydraulic cylinder is fixed on the frame and is connected with the cutting knife arm in a hinge mode through a cutting pin shaft; the supporting pin shaft penetrates through the material cutting knife cylinder to form a rotating pair and is fixed on the material cutting seat; the cutter cylinder is fixed at one end of the cutter arm.

Preferably, the fixing position of the crevasse knife is positioned on a linear path of the thread supplied by the feeding mechanism.

Preferably, the opening degree of the opening knife during opening is required to meet the maximum wire diameter.

Preferably, the extending stroke of the hydraulic cylinder for breaking the wire and the length design of the connecting rod mechanism meet the depth requirement of the breaking cutter for the breaking of the wire, and the extending stroke of the hydraulic cylinder can be adjusted to meet the breaking depth of different linear wires.

Preferably, the cutter cylinder is provided with a hole for allowing the wire to pass through and a sharp blade.

Preferably, the right side of the material cutting seat is provided with a sharp blade.

Preferably, the cutting knife arm and the supporting pin form a lever, and the cutting hydraulic cylinder extends out to enable the knife cylinder at the other end and the cutting seat to be dislocated at the position of the wire break opening in the radial stroke of the wire, so that the wire is cut off.

The feeding mechanism comprises a feeding cylinder, a fixed buckle, a polished rod, a fixed clamping jaw, a clamping jaw cylinder, a movable clamping jaw, a limiting cylinder seat, a limiting polished rod, an adjusting rod and a limiting block; the feeding mechanism is fixed on the material cutting seat of the material cutting mechanism; the feeding cylinder is fixed on the cutting seat through a bolt by a fixing buckle, and the extending end of the feeding cylinder is fixed with the fixing clamping jaw; one end of the polish rod is fixed at the tail part of the feeding cylinder, and the other end of the polish rod is fixed at the fixed clamping jaw, penetrates through a hole of the cutting mechanism and is matched with the feeding cylinder to do linear motion; the clamping jaw air cylinder is fixed on the fixed clamping jaw, and the output end of the clamping jaw air cylinder is connected with the movable clamping jaw line. The limiting cylinder is fixed on the frame by a limiting cylinder seat, and the output end of the limiting cylinder is connected with the limiting block; the adjusting rod is provided with a screw thread and is fixed on the limit; one end of the limiting polished rod is fixed on the limiting block, and the other end of the limiting polished rod penetrates through a hole of the limiting cylinder seat and is matched with the limiting cylinder to move linearly;

preferably, the linear motion direction of the sending cylinder is the same as the direction of the thread sent by the front end mechanism.

Preferably, the clamping jaw cylinder depths are that the space that activity clamping jaw and fixed clamping jaw reserved satisfies the maximum diameter wire rod, the space of activity clamping jaw and fixed clamping jaw is less than minimum diameter wire rod when clamping jaw cylinder withdraws.

Preferably, the limiting cylinder and the feeding cylinder are respectively arranged on two sides of the forming mechanism, and the wire is conveyed to a specified position by the two cylinders.

Preferably, the axis of the adjusting rod coincides with the axis of the wire, and the position of the wire is adjusted by rotating the adjusting rod.

The forming mechanism is divided into a pressing forming device and a loop taking chaining device; the press forming device comprises a horizontal hydraulic cylinder, a horizontal sliding chute, a horizontal sliding block, a groove forming block, a vertical hydraulic cylinder, a vertical sliding chute, a vertical sliding block, a transverse fixing plate, a cover plate, a forming arm, a limiting rod, a top block, a groove roller, a polished rod bolt, a thimble cylinder, a thimble connecting rod, a thimble limiting seat, a thimble connecting rod seat, a mandril seat and a mandril cylinder; the horizontal hydraulic cylinder is fixed on the frame; the horizontal sliding block is arranged on the horizontal sliding groove to form a sliding pair; the groove forming block is fixed on the horizontal sliding block; the vertical hydraulic cylinder is vertically fixed on the frame, and the output end of the vertical hydraulic cylinder is connected with the transverse fixing plate; the vertical sliding block mechanism comprises two sliding chutes which are respectively arranged in the left side and the right side of the vertical sliding chute, and the upper ends of the two vertical sliding blocks are fixed on the transverse fixed plate; one end of the forming arm is provided with a hole, a limiting rod penetrates through the hole and can move in the arc-shaped groove of the cover plate, and the middle part of the forming arm is fixed on the cover plate and the vertical sliding block by a polished rod bolt to form a hinge rotating pair; the groove roller is fixed at the tail end of the forming arm; the top block is arranged in the middle of the vertical chute; the thimble cylinder is arranged on the rack below the vertical hydraulic cylinder, and the output end of the thimble cylinder is connected with the thimble connecting rod; the thimble connecting rod and the thimble connecting rod seat are fixed in a hinge rotating pair mode; the thimble and the thimble connecting rod are fixed in a hinge mode and are limited by a waist-shaped groove of the thimble limiting seat; the core rod is connected with a core rod cylinder fixed on the frame and is limited by a core rod seat to form a sliding pair.

Preferably, the forming execution unit formed by the forming arm, the limiting rod, the groove roller and the polished rod bolt comprises two groups which are arranged symmetrically left and right relative to the oil cylinder.

Preferably, the circle center of the arc-shaped groove of the cover plate is positioned at the center of the polished rod bolt, and the forming arm can rotate around the circle center.

Preferably, the inverted V-shaped design above the top block is intended to guide the forming arms when the forming arms are pushed downward by the vertical hydraulic cylinder, so that the upper ends of the two forming arms move to both sides and the lower ends of the two forming arms are pressed inward.

Preferably, the groove roller can rotate during the process of pressing the wire down by the forming arm.

Preferably, the groove forming block comprises two grooves, namely an arc groove and a vertical groove, the arc groove extrudes the preformed wire of the forming arm again, and the vertical groove completes the final wire forming.

The ring taking chaining device comprises a motor, a large gear, a small gear shaft, a hollow gear, a gear upper fixing plate, a gear lower fixing plate, a needle bearing, a flat key, a hollow shaft, a shifting cylinder, a shifting rod, a cylinder seat, a jacking plate, a jacking cylinder, a fixing rod, a hoop and a limiting finger; the gear upper fixing plate, the gear lower fixing plate and the cylinder block are fixed by fixing rods at intervals, are used as bases of the loop taking chaining device and are fixed with the rack; the motor is fixed on the lower fixing plate of the gear, and an output shaft of the motor is connected with the large gear; the large gear is axially and radially fixed by the output shaft of the motor and a fixed plate on the gear; the small gear is fixed between the upper gear fixing plate and the lower gear fixing plate through a small gear shaft and is meshed with the large gear and the hollow gear; the jacking cylinder mechanism comprises two jacking cylinder mechanisms which are symmetrically fixed on a cylinder seat, and a push rod of each jacking cylinder mechanism is connected with a jacking plate; the jacking plate axially positions the hollow shaft; the flat key is arranged on the hollow shaft to connect the hollow gear and the hollow shaft; the hollow gear is axially positioned by an upper needle bearing, a lower needle bearing, a gear upper fixing plate and a gear lower fixing plate, and is axially positioned by a flat key; the limiting finger is fixed at the upper end of the hollow shaft by a hoop; the poking cylinder is fixed on the cylinder seat, and the output shaft is hinged with the poking rod; the middle part of the deflector rod is hinged with the cylinder seat.

Preferably, the flat key has a length that allows the hollow shaft to be lifted without being separated from the hollow gear.

Preferably, the spacing between the limiting fingers is the longer length of the chain ring, and the chain ring which is not completely formed can be placed between the limiting fingers by the dead weight of the chain ring which is stirred by the shifting lever and woven.

Preferably, the small gear exists as an idle gear, and transmits power to the large gear and the hollow gear, and meanwhile, the large gear and the central control gear are prevented from being oversized due to large center distance.

Preferably, the jacking plate is internally provided with a rolling bearing sleeved on the hollow shaft, so that the jacking plate and the hollow shaft can rotate relatively.

The invention relates to a chaining method of a large chain forming chaining machine, which comprises the following specific steps:

the method comprises the following steps that firstly, equipment is started and reset, in an initial state, a driving motor stops rotating, a crevasse hydraulic cylinder is in a retraction state, a crevasse knife is in an opening state, a blanking hydraulic cylinder is in a retraction state, a clamping jaw cylinder is in a retraction state, a feeding cylinder is in a retraction state, a limiting cylinder is in a retraction state, a core rod cylinder is in a retraction state, a thimble cylinder is in an extension state, a vertical hydraulic cylinder is in a retraction state, a horizontal hydraulic cylinder is in a retraction state, a jacking cylinder is in a retraction state, a toggle cylinder is in a retraction state, and the motor rotates until a limiting finger is perpendicular to the wire conveying direction;

secondly, the wire penetrates through the feeding hole, the straightening wheel is arranged between the driving wheels, the pre-tightening between the wire and the driving wheels is adjusted through the pressing adjusting handle, the straightening driving motor drives the driving gear box to drive the driving wheels, the driving wheels drive the wire to move for the length of a chain ring and then stop, and the feeding mechanism conveys the wire to the opening station;

step three, extending the crevasse hydraulic cylinder to drive the crevasse connecting rod to reduce an included angle between the upper crevasse tool apron and the lower crevasse tool apron, and crevassing the wire by the two crevasse tools;

driving the wire rods to move for the length of a plurality of chain rings by a driving wheel, straightening a plurality of sections of wire rods after straightening, and simultaneously conveying the sections of wire rods to a cutting station (the distance between the notching mechanism and the cutting mechanism is a plurality of times of the length of the wire rods, and in the time of intermittent conveying of the driving wheel, the subsequent processes are simultaneously carried out, namely the wire rods which are subjected to notching by the notching mechanism are allowed to enter a plurality of times of circulating operation to reach the cutting station);

step five, the clamping jaw air cylinder drives the movable air cylinder to match with the fixed clamping jaw to fix the wire, the cutting hydraulic cylinder extends out, and the cutting knife cylinder moves upwards through the supporting pin shaft and cuts off the wire with the cutting seat;

step six, the limiting cylinder extends out, the adjusting rod is located at the set position, the mandrel cylinder extends out, and the mandrel is ejected out;

step seven, the feeding cylinder stretches out to place the wire rod on the core rod, and one end of the wire rod is in contact with the adjusting rod;

step eight, the thimble cylinder extends out, the thimble connecting rod rotates around the hinge, the thimble presses downwards, and the wire rod is fixed by matching with the core rod and the adjusting rod;

step nine, loosening the clamping jaw air cylinder, and retracting the feeding air cylinder to finish a feeding process;

step ten, extending a push rod of the jacking cylinder to push the hollow shaft to ascend and keep, and driving a limiting finger to move the chain ring formed by extrusion in the step eleven into a groove of the core rod (when the step ten is executed for the first time, the jacking cylinder is in an idle stroke because the formed chain ring does not exist);

step eleven, extending a vertical hydraulic cylinder, guiding the upper part of a forming arm along the inverted V-shaped of a jacking block, rotating around a polished rod bolt, opening the upper end of the forming arm to two sides according to the arc-shaped groove of a cover plate, extruding a wire by rotating the lower end of the forming arm to the inner side, inwards bending two ends of the wire according to the contour of the core rod by extruding the forming arm, not contacting the core rod at the moment, forming a certain angle with the conveying direction of the wire in a linear state, pre-forming the wire, and retracting the vertical hydraulic cylinder;

and step twelve, extending the horizontal hydraulic cylinder, performing secondary extrusion molding on the part which is not molded and has an angle in the step eleven by the arc-shaped groove of the groove molding block (performing secondary extrusion molding on a chain ring parallel to the conveying direction of the wire rod in the chain by the numerical groove of the groove molding block, and completely molding the chain ring at the moment), and performing loop fastening (certain dislocation) on two ends of the wire rod by using the chain ring fixed by the ten limiting fingers in the step eleven. The chain with the lower end formed by the chain link which is not completely formed is fixed by a core rod, a thimble and an adjusting rod. The horizontal hydraulic cylinder retracts, and the jacking cylinder push rod retracts;

step twelve, the motor is started to drive the hollow shaft to rotate for 90 degrees, the limiting finger motor is parallel to the wire conveying direction, the jacking cylinder extends out, the limiting finger reaches the incompletely-formed chain ring, the ejector pin cylinder extends out, and the core rod cylinder retracts;

and step thirteen, the poking cylinder extends out to drive the poking rod to poke the incompletely formed chain ring to be completely fixed by a limiting finger, the poking cylinder retracts, the jacking cylinder retracts, and the motor rotates to the position where the limiting finger is perpendicular to the wire conveying direction.

The invention has the beneficial effects that:

1. the power source for realizing the required functional action adopts a hydraulic and pneumatic mode, the defects of pure mechanical transmission, large volume, complex transmission process and complex maintenance of the traditional chaining machine equipment are overcome, the production noise is reduced, the equipment vibration is reduced, and a better working environment is provided for workers.

2. The invention adopts a mode of two procedures of cutting and forming, the length of the wire rod is controlled by the feeding mechanism, and the wire rod processing of different sizes is realized by only replacing the core rod required by bending forming. Different from the traditional material cutting and forming, the whole set of forming mechanism needs to be replaced when wires with different sizes are processed. Saving mass production time and equipment cost. Is more suitable for unmanned production of production lines.

3. The invention realizes the bending and forming of the wire rod by adopting a hydraulic bending mode. For the traditional chain knitting machine, a cam rotation and cutting and forming integrated mode is adopted, the impact force required by cutting is huge, particularly for a large chain, the cutting and forming integrated mode has huge impact on a mandrel, so that the mandrel is replaced normally, the production cost is improved, and the production efficiency is reduced. The additional impact causes the link itself to be defective at the bend, reducing the chain quality. The hydraulic mode of the invention realizes adjustable pressure for wires with different diameters, and the two procedures of cutting and forming avoid overlarge impact on the core rod, avoid damage to the chain link, reduce the cost and improve the production efficiency.

4. The invention realizes one-step molding of the chain link by designing the molding mechanism. Because the wires are not bent safely at the primary bending joint, the wires need to be formed secondarily. The gear rotates to adjust the angle of the chain links for connection, meanwhile, the chain links enter the vertical groove of the forming sliding block, complete bending forming of the chain links is achieved when the next chain link is bent at one time, and one-time forming of the chain links by the same bending forming mechanism is achieved indirectly.

5. The invention adopts the servo motor to control the wire rod conveying drive, replaces a connecting rod mechanism and accurately controls the wire rod conveying length.

6. The invention adopts the crevasse device, and has the characteristic of larger cutting force required by the large-diameter wire rod, and simultaneously has the positioning function, so that the cutting device can accurately cut the wire rod according to the crevasse position in the cutting process, and the phenomenon of wire rod deviation possibly caused by one-time cutting is avoided.

Drawings

FIG. 1 is a perspective view of the overall construction of the device of the present invention;

FIG. 2 is a perspective view of the feeding mechanism of the present invention;

FIG. 3 is a perspective view of the cutting mechanism of the present invention with portions of the cutting block and portions of the broached hydraulic cylinder block removed;

FIG. 4 is a perspective view of the blanking mechanism of the present invention;

FIG. 5 is a perspective view showing the structure of the feeding mechanism of the present invention;

FIG. 6 is a perspective view of the press molding apparatus of the present invention with the cover removed;

FIG. 7 is a perspective view of another angle press forming device according to the present invention;

FIG. 8 is a perspective view of the structure of the device for taking out a loop of the present invention;

fig. 9 is a perspective view of the structure of the loop taking chaining device of the present invention.

In the figure: 1. a frame, 2, a feeding mechanism, 3, a cutting mechanism, 4, a feeding mechanism, 5, a forming mechanism, 2-1 feeding hole, 2-2 horizontal straightening base, 2-3 vertical straightening base, 2-4 fixed shaft, 2-5 straightening wheel, 2-6 driving wheel, 2-7 driving gear box, 2-8 pressing adjusting handle, 2-9 straightening driving motor, 3-1 cutting hydraulic cylinder, 3-2 cutting knife cylinder, 3-3 cutting knife arm, 3-4 cutting base, 3-5 cutting pin shaft, 3-6 supporting pin shaft, 3-7 crevasse hydraulic cylinder, 3-8 crevasse hydraulic cylinder base, 3-9 crevasse connecting rod, 3-10 upper crevasse base, 3-11 lower crevasse base, 3-12 crevasse pin shaft, 3-13 crevasse knife, 4-1 feeding cylinder, 4-2 fixed buckle, 4-3 polished rod, 4-4 fixed clamping jaw, 4-5 clamping jaw cylinder, 4-6 movable clamping jaw, 4-7 limit cylinder, 4-8 limit cylinder seat, 4-9 limit polished rod, 4-10 adjusting rod, 4-11 limit block, 5-1 horizontal hydraulic cylinder, 5-2 horizontal chute, 5-3 horizontal slide block, 5-4 groove forming block, 5-5 vertical hydraulic cylinder, 5-6 vertical chute, 5-7 vertical slide block, 5-8 horizontal fixing plate, 5-9 cover plate, 5-10 forming arm, 5-11 limit rod, 5-12 top block, 5-13 groove roller, 5-14 polished rod bolt, 5-15 thimble cylinder, 5-16 thimble connecting rods, 5-17 thimble limiting seats, 5-18 thimbles, 5-19 thimble connecting rod seats, 5-20 core rods, 5-21 core rod seats, 5-22 core rod cylinders, 5-23 motors, 5-24 large gears, 5-25 small gears, 5-26 small gear shafts, 5-27 hollow gears, 5-28 gear upper fixing plates, 5-29 gear lower fixing plates, 5-30 needle roller bearings, 5-31 flat keys, 5-32 hollow shafts, 5-33 toggle cylinders, 5-34 toggle rods, 5-35 cylinder seats, 5-36 jacking plates, 5-37 jacking cylinders, 5-38 fixing rods, 5-39 clamps and 5-40 limiting fingers

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, a large chain forming and chaining machine comprises a frame 1, a feeding mechanism 2, a cutting mechanism 3, a feeding mechanism 4 and a forming mechanism 5.

As shown in figure 2, the feeding mechanism 2 comprises a feeding hole 2-1, a horizontal straightening base 2-2, a vertical straightening base 2-3, a fixed shaft 2-4, a straightening wheel 2-5, a driving wheel 2-6, a driving gear box 2-7, a pressing adjusting handle 2-8 and a straightening driving motor 2-9. The feeding hole 2-1 is fixed on the horizontal straightening base 2-2 and plays a role in limiting and guiding the wire; the horizontal straightening base 2-2 and the vertical straightening base 2-3 are fixed on the frame 1; the straightening wheels 2-5 are fixed on the horizontal straightening base 2-2 and the vertical straightening base 2-3 through fixing shafts 2-4; the output shafts of the straightening driving motors 2 to 9 are connected with the input shaft of the driving paper wheel box; the driving wheels 2-6 are connected with an output shaft of the driving gear box; the pressing adjusting handles 2-8 are fixed above the driving gear box, and the distance between the driving wheels 2-6 is adjusted to adapt to wires with different diameters.

As a preferred embodiment, the feeding opening 2-1, the straightening wheel 2-5 and the driving wheel 2-6 are arranged on the same straight line for reserving the paths of the wires.

As a preferred embodiment, five straightening wheels 2-5 are used as a group, and a group is respectively arranged on the horizontal straightening base 2-2 and the vertical straightening base 2-3, so as to finish the horizontal straightening and the vertical straightening of the wire.

As shown in fig. 3 and 4, the cutting mechanism 3 comprises a cutting hydraulic cylinder 3-1, a cutting knife cylinder 3-2, a cutting knife arm 3-3, a cutting base 3-4, a cutting pin shaft 3-5, a supporting pin shaft 3-6, a crevasse hydraulic cylinder 3-7, a crevasse hydraulic cylinder base 3-8, a crevasse connecting rod 3-9, an upper crevasse base 3-10, a lower crevasse base 3-11, a crevasse pin shaft 3-12 and a crevasse knife 3-13; the crevasse hydraulic cylinders 3-7 are fixed on the frame 1; the crevasse connecting rod 3-9 connects the crevasse hydraulic cylinder 3-7 with the upper crevasse tool apron 3-10 and the lower crevasse tool apron 3-11 in a hinge mode and transmits power; the crevasse pin shaft 3-12 is fixed on a crevasse hydraulic cylinder seat 3-8 and forms a rotating pair of a composite hinge together with an upper crevasse tool seat 3-10 and a lower crevasse tool seat 3-11; the two crevasse knives 3-13 are in a group and are symmetrically fixed on the upper crevasse knife holder 3-10 and the lower crevasse knife holder 3-11. The material cutting hydraulic cylinder 3-1 is fixed on the frame 1 and is connected with the material cutting knife arm 3-3 in a hinge mode through a material cutting pin shaft 3-5; the supporting pin shaft 3-6 penetrates through the material cutting knife arm 3-3 to form a rotating pair and is fixed on the material cutting seat 3-4; the material cutting knife cylinder 3-2 is fixed at one end of the material cutting knife arm 3-3.

As a preferred embodiment, the fixed position of the said breaching knives 3-13 is located on the linear path of the thread fed by the feed mechanism 2.

As a preferred embodiment, the opening degree of the opening knives 3-13 during opening should satisfy the maximum strand diameter.

As a preferred embodiment, the extending stroke of the hydraulic splitting cylinder 3-7 and the length of the connecting rod mechanism are designed to meet the depth requirement of the splitting knife 3-13 on the splitting of the wire, and the splitting depth of the wire in different straight lines can be met by adjusting the extending stroke of the hydraulic splitting cylinder 3-7.

As a preferred embodiment, the cutter cylinder 3-2 is provided with a hole for allowing the wire to pass through and a sharp cutting edge.

As a preferred embodiment, the right side of the blanking seat 3-4 is provided with a sharp blade.

As a preferred embodiment, the cutting knife arm 3-3 and the supporting pin shaft 3-6 form a lever, and the cutting hydraulic cylinder 3-1 extends out to enable the cutting knife cylinder 3-2 at the other end and the cutting seat 3-4 to be dislocated at the radial stroke of the wire at the wire break, so that the wire is cut.

As shown in fig. 5, the feeding mechanism 4 comprises a feeding cylinder 4-1, a fixed buckle 4-2, a polish rod 4-3, a fixed clamping jaw 4-4, a clamping jaw cylinder 4-5, a movable clamping jaw 4-6, a limiting cylinder 4-7, a limiting cylinder seat 4-8, a limiting polish rod 4-9, an adjusting rod 4-10 and a limiting block 4-11; the feeding mechanism 4 is fixed on a material cutting seat 3-4 of the material cutting mechanism 3; the feeding cylinder 4-1 is fixed on the material cutting seat 3-4 through a fixing buckle 4-2 by a bolt, and the extending end of the feeding cylinder 4-1 is fixed with the fixing clamping jaw 4-4; one end of the polish rod 4-3 is fixed at the tail part of the feeding cylinder 4-1, and the other end is fixed at the fixed clamping jaw 4-4, penetrates through a hole of the cutting mechanism 3 and is matched with the feeding cylinder 4-1 to do linear motion; the clamping jaw air cylinder 4-5 is fixed on the fixed clamping jaw 4-4, and the output end of the clamping jaw air cylinder is connected with the movable clamping jaw 4-6 in a line mode. The limiting cylinder 4-7 is fixed on the frame 1 by a limiting cylinder seat 4-8, and a push rod of the limiting cylinder 4-7 is connected with a limiting block 4-11; the adjusting rods 4-10 are fixed on the limit through threads; one end of the limiting polished rod 4-9 is fixed on the limiting block 4-11, and the other end of the limiting polished rod passes through a hole of the limiting cylinder seat 4-8 and is matched with the limiting cylinder 4-7 to move linearly;

as a preferred embodiment, the linear motion direction of the feeding cylinder 4-1 is the same as the direction of the thread fed out by the front end mechanism.

As a preferred embodiment, the depth of the clamping jaw cylinder 4-5 is that the space reserved between the movable clamping jaw 4-6 and the fixed clamping jaw 4-4 meets the wire with the largest diameter, and the space between the movable clamping jaw 4-6 and the fixed clamping jaw 4-4 is smaller than the wire with the smallest diameter when the clamping jaw cylinder 4-5 retracts.

As a preferred embodiment, the limiting cylinder 4-7 and the feeding cylinder 4-1 are respectively arranged at two sides of the forming mechanism 5, and the wire is fed to a specified position by the two cylinders.

As a preferred embodiment, the axis of the adjusting rod 4-10 is coincident with the axis of the wire, and the position of the wire is adjusted by rotating the adjusting rod 4-10.

As shown in fig. 6, 7 and 8, the forming mechanism 5 is divided into a pressing forming device and a loop-taking chaining device; as shown in fig. 6 and 7, the press molding device comprises a horizontal hydraulic cylinder 5-1, a horizontal sliding chute 5-2, a horizontal sliding block 5-3, a groove molding block 5-4, a vertical hydraulic cylinder 5-5, a vertical sliding chute 5-6, a vertical sliding block 5-7, a transverse fixing plate 5-8, a cover plate 5-9, a molding arm 5-10, a limiting rod 5-11, a top block 5-12, a groove roller 5-13, a polished rod bolt 5-14, a thimble cylinder 5-15, a thimble connecting rod 5-16, a thimble limiting seat 5-17, a thimble 5-18, a thimble connecting rod seat 5-19, a core rod 5-20, a core rod seat 5-21 and a core rod cylinder 5-22; the horizontal hydraulic cylinder 5-1 is fixed on the frame 1; the horizontal sliding block 5-3 is arranged on the horizontal sliding groove 5-2 to form a sliding pair; the groove forming block 5-4 is fixed on the horizontal sliding block 5-3; the vertical hydraulic cylinder 5-5 is vertically fixed on the frame 1, and the output end of the vertical hydraulic cylinder is connected with the transverse fixed plate 5-8; the vertical sliding blocks 5-7 in the mechanism comprise two sliding chutes which are respectively arranged in the left and right sides of the vertical sliding chutes 5-6, and the upper ends of the two vertical sliding blocks 5-7 are fixed on the transverse fixed plates 5-8; one end of the forming arm 5-10 is provided with a hole, a limiting rod 5-11 penetrates through the hole and can move in the arc-shaped groove of the cover plate 5-9, and the middle part of the forming arm 5-10 is fixed on the cover plate 5-9 and the vertical sliding block 5-7 by a polished rod bolt 5-14 to form a hinge rotating pair; the groove rollers 5-13 are fixed at the tail ends of the forming arms 5-10; the top block 5-12 is arranged in the middle of the vertical chute 5-6; the thimble air cylinder 5-15 is arranged on the frame 1 below the vertical hydraulic cylinder 5-5, and the output end is connected with the thimble connecting rod 5-16; the thimble connecting rods 5-16 and the thimble connecting rod seats 5-19 are fixed in a hinge rotating pair mode; the thimble 5-18 and the thimble connecting rod 5-16 are fixed in a hinge mode and are limited by a waist-shaped groove of the thimble limiting seat 5-17; the mandril 5-20 is connected with a mandril cylinder 5-22 fixed on the frame 1 and is limited by a mandril base 5-21 to form a moving pair.

As a preferred embodiment, the forming execution unit formed by the forming arms 5-10, the limiting rods 5-11, the groove rollers 5-13 and the polished rod bolts 5-14 comprises two groups which are arranged symmetrically left and right relative to the oil cylinder.

As a preferred embodiment, the center of the arc-shaped groove of the cover plate 5-9 is positioned at the center of the polish rod bolt 5-14, and the forming arm 5-10 can rotate around the arc-shaped groove.

As a preferred embodiment, the inverted V-shaped design above the top block 5-12 is intended to guide the forming arm 5-10 when the forming arm 5-10 is pushed downwards by the vertical hydraulic cylinder 5-5, so that the upper ends of the two forming arms 5-10 move to the two sides and the lower ends of the two forming arms 5-10 are pressed inwards.

As a preferred embodiment, the grooved rollers 5-13 are rotatable during the pressing of the wire by the forming arms 5-10.

As a preferred embodiment, the groove forming block 5-4 comprises an arc groove and a vertical groove, the arc groove extrudes the preformed wire of the forming arm 5-10 again, and the vertical groove completes the final wire forming.

As shown in fig. 8 and 9, the loop taking and chaining device comprises a motor 5-23, a large gear 5-24, a small gear 5-25, a small gear shaft 5-26, a hollow gear 5-27, a gear upper fixing plate 5-28, a gear lower fixing plate 5-29, a needle bearing 5-30, a flat key 5-31, a hollow shaft 5-32, a toggle cylinder 5-33, a deflector rod 5-34, a cylinder seat 5-35, a jacking plate 5-36, a jacking cylinder 5-37, a fixing rod 5-38, a hoop 5-39 and a limiting finger 5-40; the gear upper fixing plate 5-28, the gear lower fixing plate 5-29 and the cylinder seat 5-35 are fixed by the fixing rods 5-38 at intervals, are used as a base of the loop taking chaining device and are fixed with the frame 1; the motor 5-23 is fixed on the gear lower fixing plate 5-29, and the output shaft of the motor 5-23 is connected with the big gear 5-24; the big gear 5-24 is axially and radially fixed by an output shaft of the motor 5-23 and a fixed plate 5-28 on the gear; the small gear is fixed between the gear upper fixing plate 5-28 and the gear lower fixing plate 5-29 by the small gear shaft 5-26 and is meshed with the large gear 5-24 and the hollow gear 5-27; the jacking cylinder 5-37 comprises two symmetrical jacking cylinders fixed on a cylinder seat 5-35, and a push rod of each jacking cylinder is connected with a jacking plate 5-36; the jacking plates 5-36 axially position the hollow shafts 5-32; the flat key 5-31 is arranged on the hollow shaft 5-32 to connect the hollow gear 5-27 and the hollow shaft 5-32; the hollow gear 5-27 is axially positioned by an upper needle bearing 5-30, a lower needle bearing 5-30, an upper gear fixing plate 5-28 and a lower gear fixing plate 5-29, and is axially positioned by a flat key 5-31; the limiting finger 5-40 is fixed at the upper end of the hollow shaft 5-32 by a clamp 5-39; the toggle cylinder 5-33 is fixed on the cylinder seat 5-35, and the output shaft is hinged with the toggle rod 5-34; the middle parts of the shift levers 5-34 are hinged with the cylinder block 5-35.

As a preferred embodiment, the flat key 5-31 has a length such that the hollow shaft 5-32 is lifted and lowered without being separated from the hollow gear 5-27.

As a preferred embodiment, the spacing distance between the limiting fingers 5-40 is longer than the length of the chain ring, and the dead weight of the chain ring which is stirred and braided by the stirring rod 5-34 can place the chain ring which is not completely formed between the limiting fingers 5-40.

As a preferred embodiment, the small gear 5-25 is used as an idle gear to transmit power between the large gear 5-24 and the hollow gear 5-27, and the large gear 5-24 and the central control gear are prevented from being oversized due to large center distance.

As a preferred embodiment, the jacking plate 5-36 is internally provided with a rolling bearing sleeved on the hollow shaft 5-32, so that the jacking plate 5-36 and the hollow shaft 5-32 can rotate relatively.

The invention relates to a chaining method of a large chain forming chaining machine, which comprises the following specific steps:

the method comprises the following steps that firstly, equipment is started and reset, in an initial state, a driving motor stops rotating, a crevassing hydraulic cylinder 3-7 is in a retracting state, a crevassing knife 3-13 is in an opening state, a blanking hydraulic cylinder 3-1 is in a retracting state, a clamping jaw cylinder 4-5 is in a retracting state, a feeding cylinder 4-1 is in a retracting state, a limiting cylinder 4-7 is in a retracting state, a core rod cylinder 5-22 is in a retracting state, an ejector pin cylinder 5-15 is in an extending state, a vertical hydraulic cylinder 5-5 is in a retracting state, a horizontal hydraulic cylinder 5-1 is in a retracting state, a jacking cylinder 5-37 is in a retracting state, a toggle cylinder 5-33 is in a retracting state, and the motor rotates until a limiting finger 5-40 is perpendicular to a wire conveying direction;

secondly, the wire penetrates through the feeding hole 2-1, the straightening wheel 2-5 is arranged between the driving wheels 2-6, the pre-tightening between the wire and the driving wheels 2-6 is adjusted through the pressing adjusting handle 2-8, the straightening driving motor 2-9 drives the driving gear box 2-7 to drive the driving wheels 2-6, the driving wheels 2-6 drive the wire to move for the length of a chain ring and then stop, and the feeding mechanism 2 sends the wire to a hole breaking station;

step three, extending the crevasse hydraulic cylinder 3-7 to drive the crevasse connecting rod 3-9 to reduce the included angle between the upper crevasse tool apron 3-10 and the lower crevasse tool apron 3-11, and crevassing the wire by the two crevasse tools 3-13;

driving wheels 2-6 to drive the wire rods to move for a plurality of chain ring lengths, and conveying the wire rods to a cutting station while straightening a plurality of wire rods (the distance between the notching mechanism and the cutting mechanism 3 is a plurality of times of the wire rod length, and in the time of intermittent conveying of the driving wheels 2-6, subsequent processes are carried out simultaneously, namely the wire rods which are subjected to notching by the notching mechanism are allowed to enter a plurality of times of circulating operation and then reach the cutting station);

step five, a clamping jaw air cylinder 4-5 drives a movable air cylinder to match with a fixed clamping jaw 4-4 to fix the wire, a material cutting hydraulic cylinder 3-1 extends out, and a material cutting knife cylinder 3-2 moves upwards through a supporting pin shaft 3-6 to cut off the wire with a material cutting seat 3-4;

sixthly, extending a limiting cylinder 4-7, positioning an adjusting rod 4-10 at a set position, extending a core rod cylinder 5-22 and ejecting a core rod 5-20;

step seven, the feeding cylinder 4-1 extends out to place the wire on the core rod 5-20, and one end of the wire is in contact with the adjusting rod 4-10;

step eight, the thimble cylinder 5-15 extends out, the thimble connecting rod 5-16 rotates around the hinge, the thimble 5-18 is pressed downwards, and the wire rod is fixed by matching the core rod 5-20 and the adjusting rod 4-10;

step nine, loosening the clamping jaw air cylinder 4-5, and retracting the feeding air cylinder 4-1 to finish a feeding process;

step ten, a push rod of the jacking cylinder 5-37 extends out to push the hollow shaft 5-32 to ascend and keep, and drives a limiting finger 5-40 to move the chain ring formed by extrusion in the step eleven into a groove of the core rod 5-20 (when the step ten is executed for the first time, the jacking cylinder 5-37 is in an idle stroke because the formed chain ring does not exist);

step eleven, extending a vertical hydraulic cylinder 5-5, guiding the upper part of a forming arm 5-10 along an inverted V shape of a top block 5-12, rotating around a polished rod bolt 5-14, opening the upper end of the forming arm 5-10 to two sides according to an arc-shaped groove of a cover plate 5-9, rotating the lower end of the forming arm 5-10 inwards to extrude the wire, extruding two ends of the wire inwards by the forming arm 5-10 to bend inwards according to the outline of a core rod 5-20, wherein two end parts of the wire do not contact the core rod 5-20 at the moment, forming a certain angle with the conveying direction of the wire in a linear state, preforming the vertical hydraulic cylinder 5-5, and retracting;

and step twelve, extending the horizontal hydraulic cylinder 5-1, performing secondary extrusion molding on the unshaped part with the angle in the step eleven by using the arc-shaped grooves of the groove forming blocks 5-4 (performing secondary extrusion molding on a chain ring parallel to the conveying direction of the wire rod in the chain by using the vertical grooves of the groove forming blocks 5-4, and completely forming the chain ring at the moment), and performing ring buckling (certain dislocation) on two ends of the wire rod on the chain ring fixed by using the ten limiting fingers 5-40. The chain which is not completely formed and is formed at the lower end of the chain link is fixed by a core rod 5-20, a thimble 5-18 and an adjusting rod 4-10. The horizontal hydraulic cylinder 5-1 retracts, and the push rod of the jacking cylinder 5-37 retracts;

step twelve, the motor is started to drive the hollow shaft 5-32 to rotate for 90 degrees, the motor for limiting the fingers 5-40 is parallel to the wire conveying direction, the jacking cylinder 5-37 extends out, the limiting fingers 5-40 extend out to the incompletely formed chain ring, the thimble cylinder 5-15 extends out, and the core rod cylinder 5-22 retracts;

and step thirteen, the poking cylinder 5-33 extends out to drive the poking rod 5-34 to poke the incompletely formed chain ring to be completely fixed by the limiting finger 5-40, the poking cylinder 5-33 retracts, the jacking cylinder 5-37 retracts, and the motor rotates until the limiting finger 5-40 is perpendicular to the wire rod conveying direction.

Claims (11)

1. The invention relates to a large chain forming and chaining machine, which comprises a rack, a feeding mechanism, a cutting mechanism, a feeding mechanism and a forming mechanism. The feeding mechanism comprises a feeding hole, a horizontal straightening base, a vertical straightening base, a fixed shaft, a straightening wheel, a driving gear box, a pressing adjusting handle and a straightening driving motor. The feeding hole is fixed on the horizontal straightening base and plays a role in limiting and guiding the wire; the horizontal straightening base and the vertical straightening base are fixed on the frame; the straightening wheels are fixed on the horizontal straightening base and the vertical straightening base by a fixed shaft; the output shaft of the straightening driving motor is connected with the input shaft of the driving paper wheel box; the driving wheel is connected with an output shaft of the driving gear box; the pressing adjusting handle is fixed above the driving gear box, and the distance between the driving wheels is adjusted to adapt to wires with different diameters.

2. The large chain forming and chaining machine as claimed in claim 1, wherein: the feeding hole, the straightening wheel and the driving wheel are arranged on the same straight line with the reserved path of the wire; the straightening wheels are divided into five groups, and the horizontal straightening base and the vertical straightening base are respectively provided with one group, so that the horizontal straightening and the vertical straightening of the wire aligning materials are respectively completed.

3. The large chain forming and chaining machine as claimed in claim 1, wherein: the cutting mechanism comprises a cutting hydraulic cylinder, a cutting knife arm, a cutting seat, a cutting pin shaft, a supporting pin shaft crevasse hydraulic cylinder, a crevasse hydraulic cylinder seat, a crevasse connecting rod, an upper crevasse seat, a lower crevasse seat, a crevasse pin shaft and a crevasse knife; the crevasse hydraulic cylinder is fixed on the frame; the crevasse connecting rod connects the crevasse hydraulic cylinder with the upper crevasse tool apron and the lower crevasse tool apron in a hinge mode and transmits power; the crevasse pin shaft is fixed on the crevasse hydraulic cylinder seat and forms a rotating pair of a composite hinge together with the upper crevasse tool apron and the lower crevasse tool apron; the two crevasse knives are a group and symmetrically fixed on the upper crevasse knife holder and the lower crevasse knife holder. The cutting hydraulic cylinder is fixed on the frame and is connected with the cutting knife arm in a hinge mode through a cutting pin shaft; the supporting pin shaft penetrates through the material cutting knife cylinder to form a rotating pair and is fixed on the material cutting seat; the cutter cylinder is fixed at one end of the cutter arm.

4. A large chain forming and chaining machine according to claim 3, characterized in that: the fixing position of the crevasse is positioned on a linear path of the thread material supplied by the feeding mechanism; the opening degree of the opening cutter during opening meets the maximum wire diameter; the extension stroke of the hydraulic cylinder for breaking the wire and the length design of the connecting rod mechanism meet the depth requirement of the breaking cutter for the breaking of the wire, and the depth of the breaking of the wire in different straight lines can be met by adjusting the extension stroke of the hydraulic cylinder; the cutting knife cylinder is provided with a hole for the wire to pass through and a sharp cutting edge; a sharp cutting edge is arranged on the right side of the material cutting seat; the cutting knife arm and the supporting pin shaft form a lever, and the cutting hydraulic cylinder extends out to enable the knife cylinder at the other end and the cutting seat to be dislocated at the radial stroke of the wire at the wire break opening, so that the wire is cut off.

5. The large chain forming and chaining machine as claimed in claim 1, wherein: the feeding mechanism comprises a feeding cylinder, a fixed buckle, a polished rod, a fixed clamping jaw, a clamping jaw cylinder, a movable clamping jaw, a limiting cylinder seat, a limiting polished rod, an adjusting rod and a limiting block; the feeding mechanism is fixed on the material cutting seat of the material cutting mechanism; the feeding cylinder is fixed on the cutting seat through a bolt by a fixing buckle, and the extending end of the feeding cylinder is fixed with the fixing clamping jaw; one end of the polish rod is fixed at the tail part of the feeding cylinder, and the other end of the polish rod is fixed at the fixed clamping jaw, penetrates through a hole of the cutting mechanism and is matched with the feeding cylinder to do linear motion; the clamping jaw air cylinder is fixed on the fixed clamping jaw, and the output end of the clamping jaw air cylinder is connected with the movable clamping jaw line. The limiting cylinder is fixed on the frame by a limiting cylinder seat, and the output end of the limiting cylinder is connected with the limiting block; the adjusting rod is provided with a screw thread and is fixed on the limit; one end of the limiting polished rod is fixed on the limiting block, and the other end of the limiting polished rod penetrates through a hole of the limiting cylinder seat and is matched with the limiting cylinder to move linearly.

6. A large chain forming and chaining machine according to claim 5, characterized in that: the linear motion direction of the feeding cylinder is the same as the direction of the thread material sent out by the front end mechanism; the space reserved between the movable clamping jaw and the fixed clamping jaw in the depth of the clamping jaw cylinder meets the wire rod with the maximum diameter, and the space between the movable clamping jaw and the fixed clamping jaw is smaller than the wire rod with the minimum diameter when the clamping jaw cylinder retracts; the limiting cylinder and the feeding cylinder are respectively arranged at two sides of the forming mechanism, and the two cylinders are used for feeding the wire to a specified position; the axis of the adjusting rod coincides with the axis of the wire, and the position of the wire is adjusted by rotating the adjusting rod.

7. The large chain forming and chaining machine as claimed in claim 1, wherein: the forming mechanism is divided into a pressing forming device and a loop taking chaining device; the press forming device comprises a horizontal hydraulic cylinder, a horizontal sliding chute, a horizontal sliding block, a groove forming block, a vertical hydraulic cylinder, a vertical sliding chute, a vertical sliding block, a transverse fixing plate, a cover plate, a forming arm, a limiting rod, a top block, a groove roller, a polished rod bolt, a thimble cylinder, a thimble connecting rod, a thimble limiting seat, a thimble connecting rod seat, a mandril seat and a mandril cylinder; the horizontal hydraulic cylinder is fixed on the frame; the horizontal sliding block is arranged on the horizontal sliding groove to form a sliding pair; the groove forming block is fixed on the horizontal sliding block; the vertical hydraulic cylinder is vertically fixed on the frame, and the output end of the vertical hydraulic cylinder is connected with the transverse fixing plate; the vertical sliding block mechanism comprises two sliding chutes which are respectively arranged in the left side and the right side of the vertical sliding chute, and the upper ends of the two vertical sliding blocks are fixed on the transverse fixed plate; one end of the forming arm is provided with a hole, a limiting rod penetrates through the hole and can move in the arc-shaped groove of the cover plate, and the middle part of the forming arm is fixed on the cover plate and the vertical sliding block by a polished rod bolt to form a hinge rotating pair; the groove roller is fixed at the tail end of the forming arm; the top block is arranged in the middle of the vertical chute; the thimble cylinder is arranged on the rack below the vertical hydraulic cylinder, and the output end of the thimble cylinder is connected with the thimble connecting rod; the thimble connecting rod and the thimble connecting rod seat are fixed in a hinge rotating pair mode; the thimble and the thimble connecting rod are fixed in a hinge mode and are limited by a waist-shaped groove of the thimble limiting seat; the core rod is connected with a core rod cylinder fixed on the frame and is limited by a core rod seat to form a sliding pair.

8. The large chain forming and chaining machine of claim 7, wherein: the forming execution unit comprises two groups of forming arms, a limiting rod, a groove roller and a polished rod bolt, the circle centers of the cover plate arc-shaped grooves are symmetrically arranged on the left and right of the oil cylinder and are positioned at the center of the polished rod bolt, and the forming arms can rotate around the forming arms; the inverted V-shaped design above the top block is intended to guide the forming arms when the forming arms are pushed downwards by the vertical hydraulic cylinder, so that the upper ends of the two forming arms move towards two sides and the lower ends of the two forming arms are extruded inwards; the groove roller can rotate in the process that the forming arm presses the wire; the groove forming block comprises two grooves, namely an arc groove and a vertical groove, the arc groove extrudes the preformed wire of the forming arm again, and the vertical groove completes final wire forming.

9. The large chain forming and chaining machine as claimed in claim 1, wherein: the ring taking chaining device comprises a motor, a large gear, a small gear shaft, a hollow gear, a gear upper fixing plate, a gear lower fixing plate, a needle bearing, a flat key, a hollow shaft, a shifting cylinder, a shifting rod, a cylinder seat, a jacking plate, a jacking cylinder, a fixing rod, a hoop and a limiting finger; the gear upper fixing plate, the gear lower fixing plate and the cylinder block are fixed by fixing rods at intervals, are used as bases of the loop taking chaining device and are fixed with the rack; the motor is fixed on the lower fixing plate of the gear, and an output shaft of the motor is connected with the large gear; the large gear is axially and radially fixed by the output shaft of the motor and a fixed plate on the gear; the small gear is fixed between the upper gear fixing plate and the lower gear fixing plate through a small gear shaft and is meshed with the large gear and the hollow gear; the jacking cylinder mechanism comprises two jacking cylinder mechanisms which are symmetrically fixed on a cylinder seat, and a push rod of each jacking cylinder mechanism is connected with a jacking plate; the jacking plate axially positions the hollow shaft; the flat key is arranged on the hollow shaft to connect the hollow gear and the hollow shaft; the hollow gear is axially positioned by an upper needle bearing, a lower needle bearing, a gear upper fixing plate and a gear lower fixing plate, and is axially positioned by a flat key; the limiting finger is fixed at the upper end of the hollow shaft by a hoop; the poking cylinder is fixed on the cylinder seat, and the output shaft is hinged with the poking rod; the middle part of the deflector rod is hinged with the cylinder seat.

10. The large chain forming and chaining machine of claim 9, wherein: the length of the flat key meets the requirement that the hollow shaft goes up and down without being separated from the hollow gear; the spacing between the limiting fingers is the longer length of the chain link, and the dead weight of the chain link after poking and braiding by the poking rod can place the chain link which is not completely formed between the limiting fingers; the small gear exists as an idler gear, transmits power to the large gear and the hollow gear, and avoids overlarge size caused by large center distance between the large gear and the central control gear; the jacking plate is internally provided with a rolling bearing sleeved on the hollow shaft, so that the relative rotation of the jacking plate and the hollow shaft can be met.

11. The large chain forming and chaining machine as claimed in claim 1, wherein: the chaining method comprises the following specific steps:

the method comprises the following steps that firstly, equipment is started and reset, in an initial state, a driving motor stops rotating, a crevasse hydraulic cylinder is in a retraction state, a crevasse knife is in an opening state, a blanking hydraulic cylinder is in a retraction state, a clamping jaw cylinder is in a retraction state, a feeding cylinder is in a retraction state, a limiting cylinder is in a retraction state, a core rod cylinder is in a retraction state, a thimble cylinder is in an extension state, a vertical hydraulic cylinder is in a retraction state, a horizontal hydraulic cylinder is in a retraction state, a jacking cylinder is in a retraction state, a toggle cylinder is in a retraction state, and the motor rotates until a limiting finger is perpendicular to the wire conveying direction;

secondly, the wire penetrates through the feeding hole, the straightening wheel is arranged between the driving wheels, the pre-tightening between the wire and the driving wheels is adjusted through the pressing adjusting handle, the straightening driving motor drives the driving gear box to drive the driving wheels, the driving wheels drive the wire to move for the length of a chain ring and then stop, and the feeding mechanism conveys the wire to the opening station;

step three, extending the crevasse hydraulic cylinder to drive the crevasse connecting rod to reduce an included angle between the upper crevasse tool apron and the lower crevasse tool apron, and crevassing the wire by the two crevasse tools;

driving the wire rods to move for the length of a plurality of chain rings by a driving wheel, straightening a plurality of sections of wire rods after straightening, and simultaneously conveying the sections of wire rods to a cutting station (the distance between the notching mechanism and the cutting mechanism is a plurality of times of the length of the wire rods, and in the time of intermittent conveying of the driving wheel, the subsequent processes are simultaneously carried out, namely the wire rods which are subjected to notching by the notching mechanism are allowed to enter a plurality of times of circulating operation to reach the cutting station);

step five, the clamping jaw air cylinder drives the movable air cylinder to match with the fixed clamping jaw to fix the wire, the cutting hydraulic cylinder extends out, and the cutting knife cylinder moves upwards through the supporting pin shaft and cuts off the wire with the cutting seat;

step six, the limiting cylinder extends out, the adjusting rod is located at the set position, the mandrel cylinder extends out, and the mandrel is ejected out;

step seven, the feeding cylinder stretches out to place the wire rod on the core rod, and one end of the wire rod is in contact with the adjusting rod;

step eight, the thimble cylinder extends out, the thimble connecting rod rotates around the hinge, the thimble presses downwards, and the wire rod is fixed by matching with the core rod and the adjusting rod;

step nine, loosening the clamping jaw air cylinder, and retracting the feeding air cylinder to finish a feeding process;

step ten, extending a push rod of the jacking cylinder to push the hollow shaft to ascend and keep, and driving a limiting finger to move the chain ring formed by extrusion in the step eleven into a groove of the core rod (when the step ten is executed for the first time, the jacking cylinder is in an idle stroke because the formed chain ring does not exist);

step eleven, extending a vertical hydraulic cylinder, guiding the upper part of a forming arm along the inverted V-shaped of a jacking block, rotating around a polished rod bolt, opening the upper end of the forming arm to two sides according to the arc-shaped groove of a cover plate, extruding a wire by rotating the lower end of the forming arm to the inner side, inwards bending two ends of the wire according to the contour of the core rod by extruding the forming arm, not contacting the core rod at the moment, forming a certain angle with the conveying direction of the wire in a linear state, pre-forming the wire, and retracting the vertical hydraulic cylinder;

and step twelve, extending the horizontal hydraulic cylinder, performing secondary extrusion molding on the part which is not molded and has an angle in the step eleven by the arc-shaped groove of the groove molding block (performing secondary extrusion molding on a chain ring parallel to the conveying direction of the wire rod in the chain by the numerical groove of the groove molding block, and completely molding the chain ring at the moment), and performing loop fastening (certain dislocation) on two ends of the wire rod by using the chain ring fixed by the ten limiting fingers in the step eleven. The chain with the lower end formed by the chain link which is not completely formed is fixed by a core rod, a thimble and an adjusting rod. The horizontal hydraulic cylinder retracts, and the jacking cylinder push rod retracts;

step twelve, the motor is started to drive the hollow shaft to rotate for 90 degrees, the limiting finger motor is parallel to the wire conveying direction, the jacking cylinder extends out, the limiting finger reaches the incompletely-formed chain ring, the ejector pin cylinder extends out, and the core rod cylinder retracts;

and step thirteen, the poking cylinder extends out to drive the poking rod to poke the incompletely formed chain ring to be completely fixed by a limiting finger, the poking cylinder retracts, the jacking cylinder retracts, and the motor rotates to the position where the limiting finger is perpendicular to the wire conveying direction.

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