Mechanical manufacturing equipment for large-diameter circular closed stirrups

Abstract

The utility model provides large-diameter circular closed stirrup mechanical manufacturing equipment which comprises a reinforcing steel bar raw material storage device, a reinforcing steel bar raw material stepped feeding device, a reinforcing steel bar raw material conveying device, an excess material receiving device, an arc bending and welding device and a finished product receiving device which are sequentially and continuously arranged on the horizontal plane. And steel bar raw materials are continuously conveyed and machined, and the problems that in the manufacturing process of large-diameter circular closed stirrups, existing equipment and forming methods are large in labor intensity, poor in universality and low in mechanical forming rate are solved.

Description

Technical Field

[0001] The utility model relates to the field of manufacturing large-diameter circular closed stirrups, in particular to a mechanical manufacturing equipment for large-diameter circular closed stirrups. Background Art

[0002] In the field of manufacturing large-diameter steel cage, its reinforcing stirrups are generally circular closed stirrups. There are generally two conventional manufacturing methods: one is forming by a bending machine: first, calculate the cutting length of the steel bar according to the arc diameter, then use a sawing or shearing device for sizing cutting, after cutting, use a bending machine to bend the arc, and finally shape and weld the bent arc in a fixed mold. After welding, the circular closed stirrup is generally taken out by prying with a crowbar. The other is forming by a numerical control circular bending machine: feed one end of a single raw material steel bar into the forming disc of the equipment, bend it into the required arc as the disc rotates, then carry out lap welding, and after welding, cut off the excess steel bar. Therefore, the formed circular closed stirrup has a certain length of tail, which needs to be manually shaped.

[0003] Both of the above two methods have disadvantages such as high labor intensity, poor versatility, and low mechanized forming rate to a certain extent. It is urgent to propose an automatic sizing mechanical manufacturing method and equipment for large-diameter circular closed stirrups to solve the above problems. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a mechanical manufacturing equipment for large-diameter circular closed stirrups, which solves the problems of high labor intensity, poor versatility, and low mechanized forming rate existing in the existing equipment and forming methods during the manufacturing process of large-diameter circular closed stirrups.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a mechanical manufacturing equipment for large-diameter circular closed stirrups, including a steel bar raw material storage device, a steel bar raw material stepped feeding device, a steel bar raw material conveying device, a waste material collecting device, an arc bending and welding device, and a finished product receiving device. The multiple devices are continuously arranged in sequence on a horizontal plane to continuously transfer and process the steel bar raw materials.

[0006] In a preferred solution, the steel bar raw material storage device is arranged at the starting point of the overall equipment for storing and outputting steel bar raw materials;

[0007] One side of the steel bar raw material stepped feeding device is connected to the discharging end of the steel bar raw material storage device, and the other side is connected to the steel bar raw material conveying device;

[0008] The steel bar raw material conveying device is arranged parallel to the steel bar raw material stepped feeding device, and is provided with a conveying roller path thereon, and controls the steel bar raw material stepped feeding device to feed a single steel bar raw material through a proximity switch;

[0009] The arc bending and welding device is connected to the end of the steel bar raw material conveying device and is used for cutting and shaping the steel bar raw materials.

[0010] The waste material collecting device is arranged in parallel on the other side of the steel bar raw material conveying device and is used for receiving the steel bar raw materials that are pushed out on the steel bar raw material conveying device and have insufficient length after being cut by the arc bending and welding device.

[0011] The finished product receiving device is arranged in front of the shaping working surface of the arc bending and welding device and rotates to the target position to receive the finished circular stirrups.

[0012] In the preferred solution, the structure of the arc bending and welding device is as follows: A disc is vertically arranged on the front side of the shaping machine frame, the center of which is connected to the driving mechanism, and a steel bar clamping mechanism is arranged at the upper end, the height of which is adapted to the height of the steel bar raw material conveying device. A plurality of variable-diameter arc shaping mechanisms are evenly arranged circumferentially along the surface of the disc, and the steel bar raw materials are arranged between the steel bar clamping mechanism and the variable-diameter arc shaping mechanisms.

[0013] Above the disc, there are also a cutting mechanism, a welding module and an end shaping mechanism. The welding module, the steel bar clamping mechanism, the end shaping mechanism and the cutting mechanism are arranged in parallel in the horizontal direction in sequence.

[0014] In the preferred solution, the variable-diameter arc shaping mechanism includes a hydraulic cylinder, an arc-shaped mold and a fixing mechanism. The top of the piston rod of the hydraulic cylinder is connected to the arc-shaped mold and points from the center of the disc to the outer edge. A steel bar fixing groove penetrating through both ends is arranged in the middle of the arc-shaped mold, and its size is adapted to the diameter of the steel bar raw material to be processed. Fixing mechanisms are symmetrically arranged at both ends of the arc-shaped mold.

[0015] In the preferred solution, the structure of the fixing mechanism is as follows: Two pressing plates are symmetrically arranged in the steel bar fixing grooves at both ends of the arc-shaped mold, and part of them are respectively rotatably connected to the two side walls of the steel bar fixing groove. Two spring holes are symmetrically arranged at the lower end of the steel bar fixing groove, and a return spring is arranged in the spring holes. One end is connected to the lower end of the pressing plate, and the other end is connected to the arc-shaped mold. The return spring provides an upward rotating force for the lower end of the pressing plate.

[0016] In the preferred solution, a first convex block is arranged on the inner side of the upper end of the pressing plate. When the pressing plate rotates upward to open and allow the steel bar raw material to pass through, the distance between the two first convex blocks is greater than the diameter of the steel bar raw material.

[0017] A second convex block is arranged on the inner side of the lower end of the pressing plate. The steel bar raw material abuts against the second convex block, and the two side pressing plates are driven to rotate downward to the bottom end of the steel bar fixing groove. The distance between the two first convex blocks is less than the diameter of the steel bar raw material, so as to effectively clamp the steel bar raw material.

[0018] The rotation ranges of the inner walls of the steel bar fixing grooves at both ends of the arc-shaped mold and the pressing plates are adapted to each other.

[0019] In a preferred embodiment, in the steel bar clamping mechanism, the steel bar clamping slider is slidably connected to the steel bar clamping mechanism slide rail, and its sliding direction points to the center of the disc. The slider fixing bolt passes through the steel bar clamping slider and abuts against the steel bar clamping mechanism slide rail to lock the steel bar clamping mechanism.

[0020] In a preferred embodiment, in the end shaping mechanism, the shaping hydraulic cylinder drives the top pressing block to move vertically and abuts against the upturned part of the end of the arc-shaped steel bar. The end is shaped by rotating the steel bar.

[0021] In a preferred embodiment, the steel bar raw material stepped feeding device is provided with multiple groups of fixed stepped plates and movable stepped plates. The driving mechanism drives the movable stepped plates to reciprocate up and down to feed the steel bar raw materials.

[0022] In a preferred embodiment, a lifting cylinder is further provided below the conveying roller path of the steel bar raw material conveying device. An inclined plate is provided at its upper end. After the lifting cylinder jacks up the remaining material of the steel bar raw material with insufficient length on the conveying roller path, it falls into the remaining material collecting device through the inclined plate.

[0023] The present utility model provides a mechanical manufacturing equipment for large-diameter circular closed stirrups. The present invention provides an automatic fixed-length mechanical manufacturing method and equipment for large-diameter circular closed stirrups. Through the continuous arrangement of multiple mechanisms, the mechanical automation of feeding, processing, finished product collection, and remaining material collection is realized, enabling the continuous processing of steel bar raw materials and significantly reducing the labor intensity of workers;

[0024] Improve the versatility of the device: Through the cooperation of the steel bar clamping mechanism and the variable-diameter arc shaping device, the device can bend steel bars with different diameters. By moving the variable-diameter arc shaping device, the device can process circular stirrups of different specifications, and obtain raw straight bars of corresponding lengths through the cutting mechanism;

[0025] Improve the mechanical forming rate of the device: Weld the joints of the arc-shaped steel bars through the welding module, shape the upturned parts of the ends through the end shaping mechanism, and then weld the joints again by the welding module to standardize the weld length of the joints. Clamp the steel bars to be processed in the steel bar fixing grooves of the arc-shaped mold through the fixing mechanism to prevent the steel bars from moving out during bending, improving the stability of the device and the processing accuracy of the finished stirrups. Brief Description of the Drawings

[0026] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0027] Figure 1 It is a schematic plane layout diagram of the equipment structure of the present utility model;

[0028] Figure 2 It is a structural diagram of the steel bar raw material feeding device of the present utility model;

[0029] Figure 3It is the structural diagram of the stepped feeding device for the original steel bars of the utility model;

[0030] Figure 4 It is the structural diagram of the conveying device for the original steel bars of the utility model;

[0031] Figure 5 It is the schematic diagram of the structure for ejecting the remaining materials of the utility model;

[0032] Figure 6 It is the structural diagram of the arc bending and welding device of the utility model;

[0033] Figure 7 It is the schematic diagram of conveying the original steel bars of the utility model to the arc bending and welding device;

[0034] Figure 8 It is the structural diagram of the steel bar clamping mechanism of the utility model;

[0035] Figure 9 It is the structural diagram of the end shaping mechanism of the utility model;

[0036] Figure 10 It is the axonometric structural diagram of the variable diameter arc shaping mechanism of the utility model;

[0037] Figure 11 It is the top view structural diagram of the variable diameter arc shaping mechanism of the utility model;

[0038] Figure 12 It is the axonometric structural diagram when the original steel bars of the utility model are arranged in the variable diameter arc shaping mechanism;

[0039] Figure 13 It is the axonometric structural diagram of the fixing mechanism of the utility model;

[0040] Figure 14 It is the axonometric structural diagram of the explosion mode of the fixing mechanism of the utility model;

[0041] Figure 15 It is the front view structural diagram when the original steel bars of the utility model enter the fixing mechanism;

[0042] Figure 16 It is the front view structural diagram when the original steel bars of the utility model are clamped in the fixing mechanism.

[0043] In the figure: the raw steel bar storage device 1; the stepped feeding device for raw steel bars 2; the conveying device for raw steel bars 3; the waste material receiving device 4; the arc bending and welding device 5; the finished product receiving device 6; the shaping frame 7; the disc 8; the welding module 9; the end shaping mechanism 10; the steel bar clamping mechanism 11; the cutting mechanism 12; the variable diameter arc shaping mechanism 13; the driving mechanism 14; the hydraulic cylinder 15; the arc-shaped mold 16; the steel bar fixing groove 1601; the spring hole 1602; the steel bar clamping slider 17; the steel bar clamping mechanism slide rail 18; the slider fixing bolt 19; the raw steel bar 20; the fixed stepped plate 21; the movable stepped plate 22; the proximity switch 23; the shaping hydraulic cylinder 24; the pressing block 25; the lifting cylinder 26; the inclined plate 27; the fixing mechanism 28; the pressing plate 2801; the return spring 2802; the first convex block 2803; the second convex block 2804. Detailed implementation mode

[0044] Embodiment 1

[0045] As Figures 1 - 16 shown, a mechanical manufacturing equipment for large-diameter circular closed stirrups includes a raw steel bar storage device 1, a stepped feeding device for raw steel bars 2, a conveying device for raw steel bars 3, a waste material receiving device 4, an arc bending and welding device 5, and a finished product receiving device 6. Multiple devices are continuously arranged in sequence on the horizontal plane to continuously transport and process the raw steel bar 20.

[0046] In a preferred solution, the raw steel bar storage device 1 is arranged at the starting point of the overall equipment for storing and outputting the raw steel bar 20;

[0047] One side of the stepped feeding device for raw steel bars 2 is connected to the discharging end of the raw steel bar storage device 1, and the other side is connected to the conveying device for raw steel bars 3;

[0048] The conveying device for raw steel bars 3 is arranged in parallel with the stepped feeding device for raw steel bars 2, and is provided with a conveying roller path thereon. The stepped feeding device for raw steel bars 2 is controlled by the proximity switch 23 to feed the raw steel bar 20 one by one;

[0049] The arc bending and welding device 5 is connected to the end of the conveying device for raw steel bars 3 for cutting and shaping the raw steel bar 20;

[0050] The waste material receiving device 4 is arranged in parallel on the other side of the conveying device for raw steel bars 3 for receiving the raw steel bar 20 with insufficient length after being cut by the arc bending and welding device 5 and pushed out on the conveying device for raw steel bars 3;

[0051] The finished product receiving device 6 is arranged on the front side of the shaping working surface of the arc bending and welding device 5 and rotates to the target position for receiving the finished circular stirrup product.

[0052] In the preferred solution, the structure of the arc bending and welding device 5 is as follows: A disc 8 is vertically provided on the front side of the shaping frame 7, and its center is connected to the driving mechanism 14. A steel bar clamping mechanism 11 is provided at the upper end, and its height is adapted to the height of the steel bar raw material conveying device 3. A plurality of variable-diameter arc shaping mechanisms 13 are evenly arranged circumferentially on the surface of the disc 8. The steel bar raw material 20 is arranged between the steel bar clamping mechanism 11 and the variable-diameter arc shaping mechanism 13.

[0053] Above the disc 8, there are also a cutting mechanism 12, a welding module 9 and a head shaping mechanism 10. The welding module 9, the steel bar clamping mechanism 11, the head shaping mechanism 10 and the cutting mechanism 12 are arranged in parallel in the horizontal direction in sequence.

[0054] In the preferred solution, the variable-diameter arc shaping mechanism 13 includes a hydraulic cylinder 15, an arc-shaped mold 16 and a fixing mechanism 28. The top end of the piston rod of the hydraulic cylinder 15 is connected to the arc-shaped mold 16, pointing from the center of the disc 8 to the outer edge. A steel bar fixing groove 1601 penetrating through both ends is provided in the middle of the arc-shaped mold 16, and its size is adapted to the diameter of the steel bar raw material 20 to be processed. Fixing mechanisms 28 are symmetrically arranged at both ends of the arc-shaped mold 16.

[0055] The steel bar raw material 20 is preliminarily fixed through the steel bar fixing groove 1601.

[0056] In the preferred solution, the structure of the fixing mechanism 28 is as follows: Two pressing plates 2801 are symmetrically arranged in the steel bar fixing grooves 1601 at both ends of the arc-shaped mold 16, and are respectively rotatably connected to the side walls of both sides of the steel bar fixing groove 1601. Two spring holes 1602 are symmetrically provided at the lower end of the steel bar fixing groove 1601. Return springs 2802 are arranged in the spring holes 1602, one end is connected to the lower end of the pressing plate 2801, and the other end is connected to the arc-shaped mold 16. The return springs 2802 provide an upward rotation force for the lower end of the pressing plate 2801.

[0057] In the preferred solution, a first convex block 2803 is provided on the inner side of the upper end of the pressing plate 2801. When the pressing plate 2801 rotates upward to open and allow the steel bar raw material 20 to pass through, the distance between the two first convex blocks 2803 is greater than the diameter of the steel bar raw material 20.

[0058] A second convex block 2804 is provided on the inner side of the lower end of the pressing plate 2801. The steel bar raw material 20 abuts against the second convex block 2804, and the two pressing plates 2801 on both sides are driven to rotate downward to the bottom end of the steel bar fixing groove 1601. The distance between the two first convex blocks 2803 is less than the diameter of the steel bar raw material 20, realizing effective clamping of the steel bar raw material 20.

[0059] The inner walls of the steel bar fixing grooves 1601 at both ends of the arc-shaped mold 16 are adapted to the rotation range of the pressing plate 2801.

[0060] Specifically, the raw steel bar 20 is arranged between the steel bar clamping mechanism 11 and the variable-diameter arc shaping mechanism 13. In the initial state, the return spring 2802 drives the pressing plate 2801 to rotate upward and open, allowing the raw steel bar 20 to enter between the two pressing plates 2801. As the disc 8 rotates, the lower end of the raw steel bar 20 abuts against the steel bar fixing groove 1601, and the second convex block 2804 drives the pressing plate 2801 to rotate downward. The first convex block 2803 cooperates and abuts against the upper end of the raw steel bar 20 to clamp the raw steel bar 20.

[0061] After the circular stirrup is processed, the hydraulic cylinder 15 drives the arc-shaped mold 16 to retract. The steel bar no longer presses against the second convex block 2804, and the return spring 2802 drives the pressing plate 2801 to rotate upward and open. The steel bar automatically disengages from the steel bar fixing groove 1601 and falls into the finished product receiving device 6.

[0062] In a preferred embodiment, in the steel bar clamping mechanism 11, the steel bar clamping slider 17 is slidably connected to the steel bar clamping mechanism slide rail 18, and its sliding direction points to the center of the disc 8. The slider fixing bolt 19 passes through the steel bar clamping slider 17 and abuts against the steel bar clamping mechanism slide rail 18 to lock the steel bar clamping mechanism 11.

[0063] In a preferred embodiment, in the end shaping mechanism 10, the shaping hydraulic cylinder 24 drives the top pressing block 25 to move vertically and abut against the warped part of the end of the arc-shaped steel bar, and the end is shaped by rotating the steel bar.

[0064] In a preferred embodiment, the raw steel bar stepped feeding device 2 is provided with multiple groups of fixed stepped plates 21 and movable stepped plates 22. The driving mechanism drives the movable stepped plate 22 to reciprocate up and down to feed the raw steel bar 20. The raw steel bar 20 shall not be stored in excess in the cross-region between the raw steel bar stepped feeding device 2 and the raw steel bar storage device 1.

[0065] In a preferred embodiment, a lifting cylinder 26 is further provided below the conveying roller path of the raw steel bar conveying device 3. An inclined plate 27 is provided at its upper end. After the lifting cylinder 26 lifts the remaining material of the raw steel bar 20 with insufficient length on the conveying roller path, it falls into the remaining material collecting device 4 through the inclined plate 27.

[0066] Generally speaking, first adjust the steel bar clamping mechanism 11 and the variable diameter arc shaping mechanism 13 according to the diameter of the steel bar to be processed and the arc radius. After the steel bar raw material 20 is manually unbundled in the steel bar raw material storage device 1, it is fed step by step to the steel bar raw material conveying device 3 through the steel bar raw material stepped feeding device 2. The steel bar raw material conveying device 3 conveys the steel bar raw material 20 into the arc bending and welding device 5. The steel bar end is clamped between the steel bar clamping mechanism 11 and the variable diameter arc shaping mechanism 13. The driving mechanism 14 drives the disc 8 to rotate to hoop the steel bar raw material 20. After the welding module 9 welds the end, the cutting mechanism 12 cuts off the redundant steel bar. The end shaping mechanism 10 shapes the end by rotating the disc 8. After shaping, the welding module 9 welds the end again to standardize the weld. After completion, the hydraulic cylinder 15 retracts, and the formed arc stirrup automatically disengages and falls into the finished product receiving device 6. The remaining steel bar with insufficient length is pushed out from the steel bar raw material conveying device 3 to the surplus material collecting device 4.

[0067] The above embodiments are only the preferred technical solutions of the present invention, and should not be regarded as a limitation to the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A large diameter circular closed stirrup mechanical manufacturing equipment, characterized by: Including steel bars A raw material storage device (1), a steel bar raw material step feeding device (2), a steel bar raw material conveying device (3), a residual material receiving device (4), an arc bending welding device (5), and a finished product receiving device (6), wherein the plurality of devices are sequentially arranged on a horizontal plane to continuously convey and process the steel bar raw materials (20).

2. According to claim 1, a large diameter circular closed stirrup mechanical manufacturing equipment is characterized by: The steel bar raw material storage device (1) is arranged at the starting point of the overall equipment and is used to store and output the steel bar raw materials (20); One side of the steel bar raw material step feeding device (2) is connected to the discharge end of the steel bar raw material storage device (1), and the other side is connected to the steel bar raw material conveying device (3); The steel bar raw material conveying device (3) is arranged in parallel with the steel bar raw material step feeding device (2), and a conveying roller is provided on the steel bar raw material step feeding device (2). The steel bar raw material step feeding device (2) is controlled by a proximity switch (23) to feed the steel bar raw material (20) one by one. The arc bending welding device (5) is connected to the end of the steel bar raw material conveying device (3) and is used to cut and shape the steel bar raw material (20); The excess material receiving device (4) is arranged in parallel on the other side of the steel bar raw material conveying device (3) and is used to receive the steel bar raw material (20) which is pushed out from the steel bar raw material conveying device (3) and is insufficient in length after being cut by the arc bending welding device (5); The finished product receiving device (6) is arranged on the front side of the shaping working surface of the arc bending welding device (5) and rotates to a target position to receive the finished circular stirrup product.

3. According to claim 2, a large diameter circular closed stirrup mechanical manufacturing equipment is characterized by: The structure of the circular arc bending welding device (5) is as follows: a circular disc (8) is vertically arranged on the front side of the shaping frame (7), the center of which is connected to the driving mechanism (14), and a steel bar clamping mechanism (11) is arranged on the upper end, the height of which is adapted to the height of the steel bar raw material conveying device (3), and a plurality of diameter-changing circular arc fixing mechanisms (13) are evenly arranged along the circumference of the surface of the circular disc (8), and the steel bar raw material (20) is arranged between the steel bar clamping mechanism (11) and the diameter-changing circular arc fixing mechanism (13); A cutting mechanism (12), a welding module (9) and an end shaping mechanism (10) are also provided above the disc (8); the welding module (9), the steel bar clamping mechanism (11), the end shaping mechanism (10) and the cutting mechanism (12) are arranged in parallel in sequence in the horizontal direction.

4. According to claim 3, a large diameter circular closed stirrup mechanical manufacturing equipment is characterized by: The variable diameter circular arc fixing mechanism (13) comprises a hydraulic cylinder (15), an arc mold (16) and a fixing mechanism (28). The top end of the piston rod of the hydraulic cylinder (15) is connected to the arc mold (16) and points from the center of the disk (8) to the outer edge. A steel bar fixing groove (1601) is provided in the middle of the arc mold (16) and passes through both ends. The size of the groove is adapted to the diameter of the steel bar raw material (20) to be processed. The fixing mechanisms (28) are symmetrically provided at both ends of the arc mold (16).

5. According to claim 4, a large diameter circular closed stirrup mechanical manufacturing equipment is characterized by: The fixing mechanism (28) has the following structure: two clamping plates (2801) are symmetrically arranged in the steel bar fixing grooves (1601) at both ends of the arc-shaped mold (16), wherein the middle parts are rotatably connected to the two side walls of the steel bar fixing groove (1601), and the lower end of the steel bar fixing groove (1601) is symmetrically provided with two spring holes (1602). A return spring (2802) is arranged in the spring hole (1602), one end of which is connected to the lower end of the clamping plate (2801) and the other end of which is connected to the arc-shaped mold (16). The return spring (2802) provides an upward rotation force for the lower end of the clamping plate (2801).

6. According to claim 5, a large diameter circular closed stirrup mechanical manufacturing equipment is characterized by: A first protrusion (2803) is provided on the inner side of the upper end of the clamping plate (2801); when the clamping plate (2801) is screwed upward to allow the steel bar raw material (20) to pass through, the distance between the two first protrusions (2803) is greater than the diameter of the steel bar raw material (20); A second protrusion (2804) is provided on the inner side of the lower end of the clamping plate (2801), and the steel bar raw material (20) abuts against the second protrusion (2804), driving the clamping plates (2801) on both sides to rotate downward to the bottom end of the steel bar fixing groove (1601), and the distance between the two first protrusions (2803) is smaller than the diameter of the steel bar raw material (20), thereby achieving effective clamping of the steel bar raw material (20); The inner walls of the steel bar fixing grooves (1601) at both ends of the arc-shaped mold (16) are adapted to the rotation range of the pressing plate (2801).

7. According to claim 3, a large diameter circular closed stirrup mechanical manufacturing equipment is characterized by: In the steel bar clamping mechanism (11), the steel bar clamping slider (17) is slidably connected to the steel bar clamping mechanism slide rail (18), and its sliding direction points to the center of the disk (8). The slider fixing bolt (19) passes through the steel bar clamping slider (17) and abuts against the steel bar clamping mechanism slide rail (18), thereby locking the steel bar clamping mechanism (11).

8. According to claim 3, a large diameter circular closed stirrup mechanical manufacturing equipment is characterized by: In the end shaping mechanism (10), the shaping hydraulic oil cylinder (24) drives the top pressure block (25) to move vertically, against the raised portion of the end of the arc steel bar, and the end is shaped by rotating the steel bar.

9. The large diameter circular closed stirrup mechanical manufacturing equipment according to claim 2 is characterized by: The steel bar raw material step feeding device (2) is provided with a plurality of sets of fixed step plates (21) and movable step plates (22), and a driving mechanism drives the movable step plates (22) to reciprocate up and down to feed the steel bar raw materials (20).

10. The large diameter circular closed stirrup mechanical manufacturing equipment according to claim 2 is characterized by: The steel bar raw material conveying device (3) is also provided with a lifting cylinder (26) below the conveying roller, and a sloping plate (27) is provided at the upper end thereof. The lifting cylinder (26) lifts the remaining steel bar raw materials (20) of insufficient length on the conveying roller, and the remaining steel bar raw materials fall into the remaining material receiving device (4) through the sloping plate (27).

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