CN108356178B - A kind of steel hoop forming machine - Google Patents

Abstract

The invention relates to a steel hoop forming machine, which belongs to the technical field of construction machinery. The steel hoop forming machine is composed of a controller, a frame, a hoop bending device, a transmission mechanism, a steel bar shovel and a steel bar bracket; support rods are symmetrically arranged on the frame; the active crank and the driven crank move between the support rods. Steel bar shovel is installed; one side of the steel shovel is provided with a feed conveyor belt; the end of the feed conveyor is equipped with a steel support; the other side of the steel shovel is provided with a bending device; The mechanisms are connected with each other; the feeding conveyor belt, the transmission mechanism and the bending hoop device are respectively electrically connected with the controller. The steel hoop forming machine has a simple structure and is easy to use, and can automatically complete the bending work of the steel hoop, which solves the problems of high labor intensity, high defective rate and low production efficiency in the existing hoop bending method. The problem meets the needs of people.

Description

A kind of steel hoop forming machine

technical field

The invention relates to a steel hoop forming machine, which belongs to the technical field of construction machinery.

Background technique

The construction industry needs to use a large number of bent and shaped hoops every day. At present, the forming of steel hoops is still done manually with the aid of equipment. A hoop needs to be bent in five places to form a complete hoop. The mode of this hoop forming is not only slow and inefficient, but also labor-intensive, and has the problem of high defective rate simultaneously; it cannot meet the needs of the production and use of enterprises. Therefore be necessary to develop a kind of hoop forming machine, can complete the bending work of hoop fully automatically, to solve the above problems that existing hoop bending mode exists.

Contents of the invention

The purpose of the present invention is to provide a steel bar hoop forming machine with simple structure and convenient use to solve the problems of high labor intensity, high defective rate and low production efficiency in the existing hoop bending method.

Technical scheme of the present invention is:

A reinforcing bar hoop forming machine, which is composed of a controller, a frame, a hoop bending device, a transmission mechanism, a steel bar shovel frame and a steel bar bracket; The active crank and the driven crank are equipped with a steel bar shovel frame; one side of the steel bar shovel frame is equipped with a feed conveyor belt; the end of the feed conveyor belt is equipped with a steel bar bracket; The drive crank is connected to each other through a transmission mechanism; the feeding conveyor belt, transmission mechanism and hoop device are respectively electrically connected to the controller.

The length of the driven crank is the same as that of the driving crank.

The steel bar shovel frame is composed of steel bar shovels and connecting rods; the symmetrically arranged steel bar shovels are connected to each other through the connecting rods to form a whole; the corresponding intervals on each steel bar shovel are provided with a plurality of separating push teeth ; Shoveling openings are arranged corresponding to each other on the reinforcement shovel plates separating the pushing teeth.

The hoop bending device is composed of a feeding slide, bender A, bender B, bender C and transmission shaft A; a feeding slide is installed on the frame; a feeding stop is fixed on one side of the feeding slide plate; two benders A are arranged symmetrically in the center on the frame below between the feeding slide and the feed baffle, and two benders B are arranged symmetrically between the two benders A; A bender C is arranged between the benders B; a drive shaft A is installed on the frame below each bender; two driving cams A and two drive cams A are fixed on the drive shaft A corresponding to each bender A driving cam B and a driving cam C; each bender A is rollingly connected with the corresponding driving cam A; each bender B is rollingly connected with the corresponding driving cam B; the bender C is connected with the corresponding driving cam C Scroll to connect.

The drive cam A, the drive cam B and the drive cam C are all provided with recesses; the recesses on the drive cam A, the drive cam B and the drive cam C are arranged in a dislocation shape; the recesses of the drive cam A and the drive cam The circumferential surface of B is corresponding; the concave opening of driving cam B is corresponding to the circumferential surface of driving cam C.

The bender A, bender B and bender C are all composed of a bending disc, a bending cylinder, a drive chain, a return spring, a fixed pin and a movable pin; the rack is equipped with a bending disc through a rotating cylinder; The frame on one side of the bending disc is symmetrically equipped with a bending cylinder and a return spring; one end of the bending cylinder is connected with a drive chain; the drive chain is connected to the return spring after bypassing the bending disc; The set chain teeth are meshed and connected; the center of the bending plate is movably installed with a movable pin through the assembly hole; the fixed pin is fixed on the bending plate on the side of the movable pin; the assembly cylinder is fixed on the bending plate below the movable pin; The lower end extends to the lower end of the assembly cylinder; the movable pin extending to the lower end of the assembly cylinder is equipped with driving rollers through the installation rod; the driving rollers of each bender are rollingly connected with the corresponding driving cams; The assembly baffle is fitted with a compression spring.

The feeding slide is arranged in an inclined shape, the upper end of the feeding slide is located below the support bar; the lower end of the feeding slide is located above the movable pin and the fixed pin of each bender.

The transmission mechanism is composed of a motor, a crank shaft, a transmission shaft B and a transmission shaft C; the motor and the transmission shaft B are installed on the frame; the motor is connected with the transmission shaft B through a transmission sprocket and a transmission chain A; The crank shaft is installed on the frame; one end of the crank shaft is fixedly connected with the lower end of the active crank; the transmission shaft B is connected with the crank shaft through the transmission sprocket and the transmission chain B; the transmission shaft C is installed on the frame 1 on the side of the transmission shaft B; The shaft C is connected with the transmission shaft B through the transmission sprocket and the transmission chain C; the transmission shaft C is meshed with the transmission gear arranged on the transmission shaft A through the gear.

The advantages of the present invention are:

The steel hoop forming machine has a simple structure and is easy to use, and can automatically complete the bending work of the steel hoop, which solves the problems of high labor intensity, high defective rate and low production efficiency in the existing hoop bending method. The problem meets the needs of people.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is the top view structure schematic diagram of the present invention;

Fig. 3 is a schematic structural diagram of A-A direction in Fig. 1;

Fig. 4 is the right view structural representation of the present invention;

Fig. 5 is the structural representation of transmission shaft A and each drive cam of the present invention;

Fig. 6 is a schematic structural diagram of B-B direction in Fig. 3;

FIG. 7 is a schematic diagram of an enlarged structure at C in FIG. 6;

Fig. 8 is the schematic diagram of the structure when the bender A bends the steel bar;

Fig. 9 is a schematic diagram of the structure when the bender B bends steel bars;

Fig. 10 is a schematic structural view of the bender C when bending steel bars;

Fig. 11 is the structural representation when the steel bar shovel frame of the present invention moves up;

Fig. 12 is a schematic structural view of the steel bar shovel of the present invention when it is in the highest position;

Fig. 13 is a schematic diagram of the structure of the steel bar shovel moving down according to the present invention.

In the figure: 1. frame, 2. steel bar shovel frame, 3. steel bar support, 4. support rod, 5. driving crank, 6. driven crank, 7. feeding conveyor belt, 8. separating pushing teeth, 9. Shovel opening, 10, feeding slide, 11, bender A, 12, bender B, 13, bender C, 14, transmission shaft A, 15, feeding baffle, 16, steel bar shovel, 17, connecting rod, 18, driving cam A, 19, driving cam B, 20, driving cam C, 21, recessed opening, 22, bending disc, 23, bending cylinder, 24, driving chain, 25, return spring, 26 , fixed pin, 27, movable pin, 28, rotating cylinder, 29, assembly cylinder, 30, installation rod, 31, driving roller, 32, assembly baffle plate, 33, compression spring, 34, motor, 35, crank shaft, 36 , transmission shaft B, 37, transmission shaft C, 38, transmission chain A, 39, transmission chain B, 40, transmission chain C, 41, transmission gear, 42, steel bar.

Detailed ways

The steel bar hoop forming machine is composed of a controller, a frame 1, a hoop bending device, a transmission mechanism, a steel bar shovel 2 and a steel bar bracket 3: the frame 1 is symmetrically provided with support rods 4; the distance between the support rods 4 Less than the length of the reinforcing bar 42 to be processed, the supporting rod 4 is a polished rod and the two supporting rods 4 are on the same horizontal plane; As for the problem of slipping.

Between the support rods 4, a steel bar shovel frame 2 is movably installed through a driving crank 5 and a driven crank 6; the length of the driven crank 6 is the same as that of the driving crank 5 (see accompanying drawing 1 of the specification). The purpose of setting the driven crank 6 and the driving crank 5 in this way is to make the driving crank 5 drive the steel bar shovel 2 during the movement process under the cooperation of the driven crank 6, so that the steel shovel 2 can be kept in a horizontal state all the time, and make it The motion track is similar to the elliptical arc motion, so that the steel bar 42 on the steel bar bracket 3 can be transferred to the support bar 4 during the movement of the steel bar shovel 2, and the steel bar 42 on the support bar 4 can be driven to "jump" Forward.

The steel bar shovel frame 2 is composed of steel bar shovels 16 and connecting rods 17; the symmetrically arranged steel bar shovels 16 are connected to each other through the connecting rods 17 to form a whole; when so arranged, there is a certain distance between the steel bar shovels 16 , and then facilitate the steel bar shovel plate 16 to drive the steel bar 42 to move down, the steel bar 42 can be shelved on the feeding slide 10, thereby facilitating it to slide from the feeding slide 10 to the bending hoop device.

A plurality of separation push teeth 8 are provided in the space corresponding to each other on each reinforcing bar shovel plate 16; The steel bar 42 is defined on the steel bar shovel plate 16, and can drive the steel bar 42 to act together, so that when the steel bar shovel frame 2 moves to the top of the support bar 4, each separating push tooth 8 is inserted into the groups of the previous few wheels and sent to the support bar 4 respectively. Between the steel bars, and synchronously push forward a distance (see accompanying drawing 12 of the specification), and during the falling process of the steel bar shovel frame 2, the steel bar 42 at the end rests on the feeding slide 10.

Shoveling openings 9 are correspondingly arranged on each steel bar shoveling plate 16 separating one side of pushing teeth 8 . The purpose of arranging the shoveling port 9 is to make the steel bar shovel 16 take out the steel bar 42 on the steel bar support 3 through the shoveling port 9 during work, so as to avoid the occurrence of the problem that the steel bar 42 slips from the steel bar shovel 16 .

One side of the steel bar shovel frame 2 is provided with a feed conveyor belt 7; the end of the feed conveyor belt 7 is equipped with a steel bar support 3; the feed conveyor belt 7 can directly transport the steel bar 42 placed on it to the steel bar support 3 for temporary storage , and the middle part of the steel bar support 3 is hollow, the purpose of such setting is to enable the steel bar 42 in the steel bar support 3 to be taken out during the working process when the steel bar shovel 2 moves from the bottom to the top (see Figure 11 of the specification) .

The other side of the steel bar shovel frame 2 is provided with a hoop bending device; the hoop bending device is composed of a feeding slide 10, a bender A11, a bender B12, a bender C13 and a drive shaft A14; the frame 1 is equipped with a feeding slide 10; One side of the feeding slide 10 is fixed with a feeding baffle 15 .

Feeding slide plate 10 is inclined shape setting, and the upper end of feeding slide plate 10 is positioned at the below of support bar 4; The purpose of arranging the feeding slide 10 and the feeding baffle 15 in this way is to make the steel bar 42 on the feeding slide 10 smoothly enter the corner of the hoop device under the effect of its own gravity and the shielding effect of the feeding baffle 15. In the gap between the movable pin 27 and the fixed pin 26.

Two benders A11 are symmetrically arranged in the center on the frame 1 below between the feeding slide 10 and the feed baffle 15, and two benders B12 are symmetrically arranged between the two benders A11; A bender C13 is arranged between each bender B12 (see accompanying drawing 3 of the specification).

The bender A11, the bender B12 and the bender C13 are all composed of a bending disc 22, a bending cylinder 23, a drive chain 24, a return spring 25, a fixed pin 26 and a movable pin 27 (see accompanying drawings 3 and 7 of the specification) .

The frame 1 is equipped with a bending disc 22 through the rotating drum 28; the frame 1 on the side of the bending disc 22 is symmetrically equipped with a bending cylinder 23 and a return spring 25; one end of the bending cylinder 23 is connected with a drive chain 24; the drive chain 24 is connected with the return spring 25 after bypassing the bending disc; the sprocket teeth provided on the circumferential surface of the driving chain 24 and the bending disc 22 are engaged and connected; the bending cylinder 23 can pull the bending disc 22 to rotate through the driving chain 24 during work; the bending cylinder 23 Return spring 25 can pull bending disc 22 and bending cylinder 23 resets by drive chain 24 after work finishes.

The center of the bending disc 22 is movably installed with a movable pin 27 through the assembly hole; the movable pin 27 can move up and down along the assembly hole. A fixed pin 26 is fixedly mounted on the curved plate 22 on one side of the movable pin 27 . The distance between the movable pin 27 and the fixed pin 26 is slightly larger than the diameter of the reinforcing bar 42, so that the reinforcing bars 42 are arranged in a stacked form after falling between the movable pin 27 and the fixed pin 26, so that when the reinforcing bars 42 are piled up, each reinforcing bar 42 The problem of inconsistent bending radius.

The bending plate 22 below the movable pin 27 is fixedly equipped with an assembly cylinder 29; the lower end of the movable pin 27 extends to the lower end of the assembly cylinder 29; Attached picture 7 of the instruction manual). The movable pin 27 in the assembly cylinder 29 is equipped with a compression spring 33 through a fixed assembly baffle plate 32 . The purpose of setting the movable pin 27 in this way is to make the movable pin 27 always have a tendency to move downward under the action of the elastic force of the compression spring 33, so that the driving rollers 31 of each bender can be always rollingly connected with the corresponding driving cam ; So as to achieve the purpose of controlling the movable pin 27 to move up and down by driving the cam.

The frame 1 below each bender is equipped with a drive shaft A14; two drive cams A18, two drive cams B19 and a drive cam C20 are fixedly installed on the drive shaft A14 corresponding to each bender; each bend Each bender A11 is rollingly connected to the corresponding driving cam A18; each bender B12 is rollingly connected to the corresponding driving cam B19; the bender C13 is rollingly connected to the corresponding driving cam C20 (see Figure 4 of the specification).

The driving cam A18, the driving cam B19 and the driving cam C20 are all provided with recessed openings 21; the purpose of setting the recessed openings 21 is to make each movable pin 27 move down under the elastic force of the compression spring 33 during the working process. When the driving roller 31 connected with it entered the inside of the recessed opening 21, the movable pin 27 was at the lowest position, and its upper end completely entered the inside of the corresponding bending disc 22, thereby avoiding the occurrence of the bending problem of the movable pin 27 hindering the reinforcing bar 42; When the driving roller 31 is rollingly connected with the circumferential surface of the corresponding driving cam, the movable pin 27 is at the highest position, and its upper end is at a position parallel to the fixed pin 26 .

The recessed opening 21 on the driving cam A18, the driving cam B19 and the driving cam C20 is arranged in a dislocation shape; the recessed opening 21 of the driving cam A18 corresponds to the circumferential surface of the driving cam B19; the recessed opening of the driving cam B19 corresponds to the circumferential surface of the driving cam C20 Corresponding (see Figure 5 of the instruction manual). The purpose of setting the drive cam A18, the drive cam B19 and the drive cam C20 in this way is to make each drive cam drive the movable pin 27 of the corresponding bender to move up and down, when the movable pin 27 of the bender B12 is at the highest position, the bending The movable pin 27 of the bender A11 is at the lowest position; when the movable pin 27 of the bender C13 is at the highest position, the movable pin 27 of the bender B12 is at the lowest position. Only in this way can it be ensured that when the bender B12 bends the steel bar 42, the movable pin 27 of the bender A11 will not hinder the movement of the steel bar 42; when the bender C13 bends the steel bar 42, the movable pin 27 of the bender B12 Will not hinder the movement of steel bar 42.

The hoop device and the driving crank are connected to each other through a transmission mechanism; the transmission mechanism is composed of a motor 34, a crank shaft 35, a transmission shaft B36 and a transmission shaft C37; the frame 1 is equipped with a motor 34 and a transmission shaft B36; the motor 34 passes through a transmission chain Wheel and transmission chain A38 are connected with transmission shaft B36; Crank shaft 35 is housed on the frame 1 of motor 34 sides; One end of crank shaft 35 is fixedly connected with the lower end of driving crank 5; Transmission shaft B36 passes transmission chain wheel and transmission chain B39 Connect with crank rotating shaft 35; Transmission shaft C37 is housed on the frame 1 of transmission shaft B36 side; Transmission shaft C37 is connected with transmission shaft B36 by transmission sprocket and transmission chain C40; Transmission shaft C37 is provided with on the transmission shaft A14 through gear The transmission gear 41 is meshedly connected. When the transmission mechanism is set in this way, the motor 34 can drive the transmission shaft A14 to rotate counterclockwise and the driving crank 5 to rotate clockwise during the working process.

The feeding conveyer belt, the transmission mechanism and the hoop bending device of the reinforcing bar hoop forming machine are respectively electrically connected with the controller. The controller can control the feeding conveyor belt, the transmission mechanism and the bending hoop device to move according to the program.

When this reinforcing bar hoop forming machine was working, under the action of the controller, the motor 34 drives the transmission shaft A14 to rotate counterclockwise through the transmission chain A38, the transmission chain C40 and the transmission gear 41, and the transmission shaft A14 drives each driving cam to rotate synchronously. The motor 34 drives the driving crank 5 to rotate clockwise through the transmission chain A38 and the transmission chain B39; the driving crank 5 drives the steel bar shovel frame 2 to move according to the track.

In this process, the steel bars 42 to be bent are placed side by side on the feed conveyor belt 7 successively, and the feed conveyor belt 7 drives each steel bar 42 to move backward and finally falls on the steel bar support 3; when the feed conveyor belt 7 moves At a certain distance, after a certain amount of steel bars 42 are stored on the steel bar support 3, the feeding conveyor belt 7 just stops moving;

Then one end of the steel bar shovel frame 2 moves upwards in an arc-shaped trajectory, and the shovel opening 9 on the steel bar shovel plate 16 takes the steel bar 42 out of the steel bar bracket 3 during the upward movement (see accompanying drawing 11 of the description); when the steel bar shovel frame 2. When moving to the highest position, the steel bar shovel 16 drives the steel bar 42 to just move to the top of the support rod 4. In this process, the feeding conveyor belt 7 repeats the above-mentioned actions, and a certain amount of steel bars 42 are transported to the steel bar support 3 for storage; then the steel bar shovel plate 16 drives the steel bars 42 to move down, and at this time the steel bars 42 are placed on the support rod 4 On, one end of steel bar shovel plate 16 moves to the below of steel bar support 3 again.

Then the steel bar shovel 2 repeats the above-mentioned action to transport the lower group of steel bars 42 to the support rod 4 . During this process, when the steel bar shovel 2 moves to the highest position, the steel bar shovel 16 will lift out the steel bar 42 on the support rod 4 through the separating push teeth 8 (see accompanying drawing 12 of the specification), and then the steel bar shovel 2 is The arc track moves downward and to the right. During the moving process of the steel bar shovel frame 2, the lower group of steel bars 42 is placed on the support rod 4, and the steel bar 42 between the steel bar shovel plates 16 is driven to move to the right for a certain distance and then placed on it again. on the support rod 4.

In this way, the steel bar shovel 2 continuously transports the subsequent steel bar 42 to the support bar 4 during the process of repeating the above-mentioned actions, and drives the steel bar 42 to continuously move to the right on the support bar 4 in a manner similar to "jumping". A group of steel bars 42 are lifted out by the steel bar shovel plate 16 between the push teeth 8 at the end and then moved down. The steel bars 42 are rested on the feeding slide 10 (see accompanying drawing 13 of the specification), and then the steel bars 42 are placed under their own gravity. Under the action of feeding baffle plate 15 and under the shielding effect of feeding slide plate 10, enter smoothly into the gap between the movable pin 27 and the fixed pin 26 of each bender of the hoop device.

When the steel bar 42 fell into the hoop device, the circumferential surface of the driving cam A18 was rollingly connected with the driving roller 31 of the bender A11; the movable pin 27 of the bender A11 was at the highest position; Cylinder 23 moves and pulls bending disk 22 to rotate by drive chain 24; The two ends of 42 are bent (refer to accompanying drawing 8 of specification sheet). Then the bending cylinder 23 stops moving and the return spring 25 pulls the bending disc 22 and the bending cylinder 23 through the driving chain 24 to reset.

After the two ends of the steel bar 42 have been bent, the transmission shaft A14 just drives the drive cam A18 to rotate to the concave opening 21 and the drive roller 31 of each bender A11 to roll and connect; the circumferential surface of the drive cam B19 rolls with each bender B12 connect. At this time, the movable pin 27 of each bender A11 is at the lowest position (that is, the upper end of the movable pin 27 is completely immersed in the inside of the corresponding bending disc 22); the movable pin 27 of each bender B12 is at the highest position; at this time, each bender The bending cylinder 23 of B12 moves and pulls the bending disc 22 to rotate by the drive chain 24; Next, the inside of the steel bar 42 is bent (see accompanying drawing 9 of the description). Then the bending cylinder 23 stops moving and the return spring 25 pulls the bending disc 22 and the bending cylinder 23 through the driving chain 24 to reset.

After the middle part of the steel bar 42 is bent, the transmission shaft A14 just drives the drive cam B19 to rotate to the recessed opening 21 and the drive roller 31 of each bender B12 to roll and connect; the circumferential surface of the drive cam C20 and the drive roller of the bender C13 31 scrolling connections.

At this time, the movable pin 27 of each bender B12 is at the lowest position (that is, the upper end of the movable pin 27 is completely immersed in the inside of the corresponding bending disc 22); the movable pin 27 of each bender C13 is at the highest position; at this time, the bender C13 The bending cylinder 23 moves and pulls the bending disk 22 to rotate through the drive chain 24; during the rotation of the bending disk 22 of each bender B12, the fixed pin 26 on the bending disk 22 rotates with it, and under the cooperation of the movable pin 27 Bending the middle part of the steel bar 42 (see accompanying drawing 10 of the description). Then the bending cylinder 23 stops moving and the return spring 25 pulls the bending disc 22 and the bending cylinder 23 through the driving chain 24 to reset. At this point, the processing of the steel bar hoops is completed, and then the processed steel bar hoops are taken out by other equipment. At this time, the lower group of steel bars 42 just falls into the bending hoop device, and then the bending hoop device repeats the above actions, and the steel bar hoop forming machine can enter the lower a working cycle.

The steel hoop forming machine has a simple structure and is easy to use, and can automatically complete the bending work of the steel hoop, which solves the problems of high labor intensity, high defective rate and low production efficiency in the existing hoop bending method. The problem meets the needs of people.

Claims (6)

1. A steel bar hoop forming machine, which is composed of a controller, a frame (1), a bending hoop device, a transmission mechanism, a steel bar shovel (2) and a steel bar bracket (3); one side of the steel bar shovel (2) A feeding conveyor belt (7) is provided; a steel bar bracket (3) is installed at the end of the feeding conveyor belt (7); the other side of the steel bar shovel frame (2) is provided with a hoop device; the hoop device and the driving crank pass through The transmission mechanisms are connected to each other; the feeding conveyor belt, the transmission mechanism and the bending hoop device are respectively electrically connected to the controller; it is characterized in that support rods (4) are symmetrically arranged on the frame (1); the support rods (4 ) between the active crank (5) and the driven crank (6) is installed with a reinforced bucket frame (2); the length of the driven crank (6) is the same as the length of the active crank (5), so the active crank (5) During the movement of the steel bar shovel (2) driven by the cooperation of the driven crank (6), the steel bar shovel (2) can always be kept in a horizontal state, and its motion track is similar to an elliptical arc motion, so that the steel bar shovel During the movement of the frame (2), it can not only transfer the steel bar (42) on the steel bar bracket (3) to the support bar (4), but also drive the steel bar (42) on the support bar (4) to move forward in a "jumping" manner. Row; steel bar shovel frame (2) is made of steel bar shovel board (16) and connecting rod (17); The steel bar shovel board (16) that is arranged symmetrically is mutually connected into a whole through connecting rod (17); Each steel bar shovel The plate (16) is provided with a plurality of partitioned push teeth (8) corresponding to each other at intervals; each reinforcement shovel plate (16) on one side of the partition push teeth (8) is provided with a shovel opening (9) corresponding to each other. 2. A steel hoop forming machine according to claim 1, characterized in that: said hoop bending device consists of a feeding slide (10), a bender A (11), and a bender B (12) , Bender C (13) and drive shaft A (14); the frame (1) is equipped with a feeding slide (10); one side of the feeding slide (10) is fixed with a feeding baffle (15); Two benders A (11) are arranged symmetrically in the center on the lower frame (1) between the feeding slide (10) and the feed baffle (15), and between the two benders A (11) There are two benders B (12) arranged symmetrically; a bender C (13) is arranged between the two benders B (12); a drive shaft is installed on the frame (1) below each bender A (14); two drive cams A (18), two drive cams B (19) and one drive cam C (20) are installed on the transmission shaft A (14) corresponding to each bender; Benders A (11) are rollingly connected to corresponding drive cams A (18); each bender B (12) is rollingly connected to corresponding driving cams B (19); bender C (13) is connected to corresponding The driving cam C (20) is rollingly connected. 3. A reinforcing bar hoop forming machine according to claim 2, characterized in that: said driving cam A (18), driving cam B (19) and driving cam C (20) are all provided with recesses (21); the concave openings (21) on the driving cam A (18), driving cam B (19) and driving cam C (20) are set in a dislocation shape; the concave openings (21) of the driving cam A (18) and the driving The circumferential surface of the cam B (19) corresponds; the recessed opening (21) of the driving cam B (19) corresponds to the circumferential surface of the driving cam C (20). 4. A steel hoop forming machine according to claim 3, characterized in that: the bender A (11), the bender B (12) and the bender C (13) are all composed of bending disc (22), bending cylinder (23), drive chain (24), return spring (25), fixed pin (26) and movable pin (27); Bending disc (22) is arranged; Bending cylinder (23) and return spring (25) are equipped with bending cylinder (23) and return spring (25) symmetrically on the frame (1) of bending disk (22) one side; One end of bending cylinder (23) is connected with driving chain ( 24); the drive chain (24) is connected with the return spring (25) after bypassing the curved disc (22); the drive chain (24) is meshed with the chain teeth provided on the circumferential surface of the curved disc (22); the curved disc ( The center of 22) is movably installed with a movable pin (27) through the assembly hole; the fixed pin (26) is fixedly installed on the bending disc (22) on the side of the movable pin (27); the bending disc (22) below the movable pin (27) ) is fixedly equipped with an assembly cylinder (29); the lower end of the movable pin (27) extends to the lower end of the assembly cylinder (29); the movable pin (27) extending to the lower end of the assembly cylinder (29) is equipped with a Driving rollers (31); the driving rollers (31) of each bender are rollingly connected with the corresponding driving cams; the movable pins (27) in the assembly cylinder (29) are equipped with compression pins (27) through the fixed assembly baffles (32). spring (33). 5. A steel hoop forming machine according to claim 4, characterized in that: the feeding slide (10) is arranged in an inclined shape, and the upper end of the feeding slide (10) is located at the end of the support rod (4). Below; the lower end of the feeding slide (10) is positioned above the movable pin (27) and the fixed pin (26) of each bender. 6. A steel hoop forming machine according to claim 5, characterized in that: the transmission mechanism is composed of a motor (34), a crank shaft (35), a transmission shaft B (36) and a transmission shaft C (37 ) form; the frame (1) is equipped with a motor (34) and a transmission shaft B (36); the motor (34) is connected with the transmission shaft B (36) through a transmission sprocket and a transmission chain A (38); the motor (34) The crank shaft (35) is housed on the frame (1) on one side; one end of the crank shaft (35) is fixedly connected with the lower end of the driving crank (5); the transmission shaft B (36) passes through the transmission sprocket and the transmission chain B (39 ) is connected with the crank shaft (35); the frame (1) on the side of the transmission shaft B (36) is equipped with the transmission shaft C (37); the transmission shaft C (37) is connected with the transmission sprocket and the transmission chain C (40) The transmission shaft B (36) is connected; the transmission shaft C (37) is meshed with the transmission gear (41) provided on the transmission shaft A (14) through a gear.