Full-automatic riveting equipment for inserting steel bars into two ends of pipe

Abstract

The invention discloses full-automatic riveting equipment for inserting steel bars into two ends of a pipe, relates to the technical field of pipe processing, and solves the problems of poor precision, low efficiency and high safety risk in the prior art. The equipment comprises a rack, inserted steel bar riveting mechanisms symmetrically arranged at the two ends, a round pipe storing and conveying device, a steel bar storage bin, a steel bar pushing device and a damping device. Through linkage control of a sensor, automatic feeding and accurate pushing of a round pipe and a reinforcing steel bar are achieved, the reinforcing steel bar pushing device is matched with a damping device to ensure that the insertion length tolerance of the reinforcing steel bar is 65mm + / -0.5 mm, the two ends are synchronously riveted to ensure that concave points are located on the same plane, and automatic discharging is achieved through a material returning air cylinder after machining is completed. The device is high in automation degree, low in labor intensity and controllable in size precision, the efficiency is improved by more than three times compared with that of a traditional technology, and the device is suitable for riveting machining of round pipes such as chair foot stools and reinforcing steel bars and suitable for large-scale production.

Description

Technical Field

[0001] This invention relates to the field of riveting equipment for pipes and reinforcing bars, and particularly to a fully automatic pipe-end riveting equipment for inserting reinforcing bars. Background Technology

[0002] During the production of the chair legs, 167mm long steel bars need to be inserted into both ends of a ∅14x2.0 specification round tube. The dimensional tolerance between the end of the steel bar and the end of the round tube is required to be 65mm±0.5mm. Indentations need to be pressed on the round tube to fix the steel bars (because there is a 0.5mm gap between the outer diameter of the steel bar and the inner diameter of the round tube).

[0003] The existing processing technology uses a 6.3-ton punch press with a riveting die, and is completed manually: the steel bar is inserted into one end of the round tube by hand, and the 65mm positioning structure of the die is used to press and form a concave point by the punch press; then the round tube is flipped over by hand, and the operation is repeated to complete the riveting of the other end, and the concave point positions at both ends need to be aligned manually.

[0004] The existing technology has the following drawbacks: 1. Manual positioning results in the concave points at both ends not being on the same plane, leading to significant errors, and the 65mm dimensional tolerance between the rebar end and the round pipe end cannot be stably controlled within ±0.5mm; 2. If the welded pipe has a high inner diameter weld bead, manual insertion of the rebar is difficult, requiring the use of auxiliary tools for hammering, which can easily damage the workpiece; 3. The process is cumbersome, labor-intensive, and inefficient, and manual operation of the punch press poses safety risks such as crushing; 4. Product quality consistency is poor, failing to meet the needs of large-scale production. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art and provide a fully automatic pipe end inserting and riveting device to realize automatic feeding, precise positioning, synchronous riveting and automatic unloading of round pipes and steel bars, and solve the problems of unstable dimensional tolerance, poor concave point alignment accuracy, low efficiency, high labor intensity and high safety risks in the prior art.

[0006] The present invention adopts the following technical solution: A fully automatic pipe-end rebar insertion and riveting device includes a frame, wherein a left-end rebar insertion and riveting mechanism and a right-end rebar insertion and riveting mechanism are symmetrically arranged at both ends of the frame; The left-end inserted steel bar riveting mechanism and the right-end inserted steel bar riveting mechanism respectively include a riveting device, a round tube storage and conveying device, a steel bar storage bin, a steel bar pushing device and a damping device; The circular tube storage and conveying device is used to store circular tubes and feed them one by one into the riveting device in an orderly manner. The steel bar storage bin is used to store steel bars and to feed the steel bars one by one into the steel bar pushing position in an orderly manner. The rebar pushing device pushes the rebar at the pushing position into the designated positions at both ends of the round tube at the riveting device; The damping device is used to provide resistance to the pushed steel bars; The riveting device is used to rivet and clamp the fed round pipe and the inserted steel bar.

[0007] Preferably, the riveting device includes a riveting mold and a jaw frame. The riveting mold includes a lower riveting mold, a cover plate, and a fixing plate. A base plate is provided at the bottom of the jaw of the jaw frame, and a top plate is provided at the top of the jaw of the jaw frame. A pressing cylinder is installed on the top plate. The bottom output end of the pressing cylinder is fixedly connected to the pressing plate. A cover plate is fixedly installed at the bottom of the pressing plate. The cover plate and the fixing plate are fixedly connected. A guide post and an ejector pin are fixedly installed on the fixing plate. A riveting stripper plate is installed at the lower part of the guide post. The riveting stripper plate moves along the guide post. A return spring is connected between the riveting stripper plate and the fixing plate. The base plate is provided with a lower riveting mold. Semicircular grooves are correspondingly opened on the upper surface of the lower riveting mold and the bottom surface of the riveting stripper plate. The two semicircular grooves form a circular tube limiting pressure groove.

[0008] Preferably, the circular tube storage and conveying device includes a circular tube storage bin and a circular tube pushing cylinder, which can push the circular tube into a semi-circular groove on the bottom surface of the riveting stripper plate.

[0009] Preferably, the rebar pushing device includes a push rod fixing plate, a slider, a guide rail, a positioning pin, a rebar pin, and a rebar pushing cylinder. The positioning pin and the rebar pin are mounted on the push rod fixing plate, and the push rod fixing plate is fixedly connected to the slider. The rebar pushing cylinder drives the slider to move the positioning pin and the rebar pin. The rebar pin pushes the rebar at the rebar pushing position into the designated positions at both ends of the round tube at the riveting device.

[0010] Preferably, the damping device includes a damping base, a damping baffle, a slide rail, a damping slide plate, and a coil spring. The damping slide plate is slidably connected to the slide rail, and the coil spring drives the damping slide plate to clamp the reinforcing bar. The damping slide plate is provided with a reinforcing bar clamping groove and a positioning hole. The positioning hole is used to insert a positioning pin, and the reinforcing bar pushed by the reinforcing bar pin passes through the reinforcing bar clamping groove.

[0011] Preferably, the front end of the riveting lower mold is provided with a rebar insertion length positioning block. When the positioning pin tightens the rebar insertion length positioning block, the rebar pin pushes the rebar into the round tube, and the distance between the end of the rebar and the end of the round tube is 65mm±0.5mm.

[0012] Preferably, the left-end steel bar insertion riveting mechanism and the right-end steel bar insertion riveting mechanism are also equipped with a material ejection cylinder, which drives the riveting stripping plate to realize automatic unloading of the round tube.

[0013] Preferably, the left-end rebar insertion riveting mechanism and the right-end rebar insertion riveting mechanism are also equipped with sensors to detect the positioning status of the rebar and the round pipe.

[0014] Preferably, the positioning pin of the rebar pusher is arranged parallel to the rebar pin, and the length of the positioning pin is greater than the length of the rebar pin. The length difference between the two is matched with the thickness of the damping base of the damping device to form the positioning dimension for the rebar insertion length.

[0015] Preferably, the arc of the circular tube limiting groove is adapted to the outer diameter of the circular tube, and a circular tube baffle is correspondingly provided on the riveting lower die. The circular tube baffle is provided with a beveled structure to guide the processed circular tube to automatically roll out of the equipment.

[0016] The beneficial effects of this invention are: (1) High degree of automation: Through the coordinated action of the round tube storage and conveying device, the steel bar pushing device and the sensor, the automatic feeding, precise pushing, synchronous riveting and automatic unloading of the round tube and the steel bar are realized. The entire process only requires manual replenishment of raw materials, which greatly reduces labor intensity and eliminates the safety risks of manual operation of the punch press; (2) Controllable dimensional accuracy: Through the cooperation of the steel bar ejector pin, the positioning ejector pin, the steel bar insertion length positioning block and the damping device, the dimensional tolerance between the end of the steel bar and the end of the round tube is stably controlled within the range of 65mm±0.5mm, and the synchronous riveting of both ends ensures that the concave points are on the same plane, solving the problem. (3) Strong adaptability: The damping device drives the damping slide to clamp the steel bar through the line spring. Even if the inner diameter of the round pipe is high, the steel bar can be smoothly inserted into the round pipe through the pushing force of the steel bar pin and the auxiliary guiding effect of the damping device without additional hammering; (4) Significantly improved efficiency: The two ends are processed simultaneously. Compared with the traditional manual flipping and processing method, the efficiency is increased by more than 3 times, which meets the needs of large-scale production; (5) Stable and reliable structure: Each component is guided by the structure of guide rail, guide column, etc., and driven by the cylinder and oil cylinder. The operation is stable and the product quality is highly consistent. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of a rebar riveting mechanism inserted at the right end in this invention; Figure 4 This is a schematic diagram of the internal structure of the right-end steel bar riveting mechanism in this invention; Figure 5 This is a perspective view of the riveting mold in this invention; Figure 6 This is a front view of the riveting mold in this invention; Figure 7 yes Figure 6 A cross-sectional view along the AA direction; Figure 8This is a schematic diagram of one structure of the damping device in this invention; Figure 9 This is a schematic diagram of a steel bar pushing device in this invention; Figure 10 This is a schematic diagram of a steel bar storage silo in this invention; Figure 11 This is a schematic diagram of one structure of the circular tube storage and conveying device in this invention; In the diagram: 1. Frame; 2. Left end rebar riveting mechanism; 3. Right end rebar riveting mechanism; 4. Round pipe; 5. Round pipe storage and conveying device; 6. Grip frame; 7. Downward pressing cylinder; 8. Base plate; 9. Top plate; 10. Downward pressing plate; 11. Unloading cylinder; 12. Round pipe pushing cylinder; 13. Rebar storage bin; 14. Damping device; 15. Rebar pushing device; 16. Cover plate; 17. Fixing plate; 18. Riveting and unloading plate; 19. Guide column; 20. Reset. 21. Spring, 22. Round tube limiting groove, 23. Round tube baffle, 24. Ejector pin, 25. Damping base, 26. Damping baffle, 27. Slide rail, 28. Damping slide plate, 29. Wire spring, 30. Rebar clamping groove, 31. Positioning hole, 32. Push rod fixing plate, 33. Slider, 34. Guide rail, 35. Positioning ejector pin, 36. Rebar pushing cylinder, 37. Round tube storage bin, 38. Riveting lower mold, 39. Rebar insertion length positioning block. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example: Figures 1-11 As shown, a fully automatic pipe end inserting rebar riveting device includes a frame 1, and the two ends of the frame are symmetrically arranged with a left end inserting rebar riveting mechanism 2 and a right end inserting rebar riveting mechanism 3; The left-end insertion rebar riveting mechanism and the right-end insertion rebar riveting mechanism each include a riveting device, a round pipe conveying device 5, a rebar storage bin 13, a rebar pushing device 15, and a damping device 14. The circular tube storage and conveying device is used to store the circular tubes 4 and feed the circular tubes one by one into the riveting device in an orderly manner; The steel bar storage bin is used to store steel bars and to feed them one by one into the steel bar pushing position in an orderly manner. The rebar pusher pushes the rebar at the push position and inserts it into the designated positions at both ends of the round tube at the rivet device. Damping devices are used to provide resistance to the pushing of reinforcing bars; The riveting device is used to rivet and clamp the fed round pipe and the inserted steel bar.

[0019] The riveting device includes a riveting mold and a jaw frame 6. The riveting mold includes a lower riveting mold 38, a cover plate 16, and a fixing plate 17. A base plate 8 is provided at the bottom of the jaw of the jaw frame, and a top plate 9 is provided at the top of the jaw of the jaw frame. A pressing cylinder 7 is installed on the top plate. A pressing plate 10 is fixedly connected to the bottom output end of the pressing cylinder. A cover plate is fixedly installed at the bottom of the pressing plate. The cover plate and the fixing plate are fixedly connected. A guide post 19 and an ejector pin 23 are fixedly installed on the fixing plate. A riveting stripper plate 18 is installed at the bottom of the guide post. The riveting stripper plate moves along the guide post. A return spring 20 is connected between the riveting stripper plate and the fixing plate. The base plate is provided with a lower riveting mold. Semicircular grooves are correspondingly opened on the upper surface of the lower riveting mold and the bottom surface of the riveting stripper plate. The two semicircular grooves form a circular tube limiting pressure groove 21.

[0020] The circular tube storage and conveying device includes a circular tube storage bin 37 and a circular tube pushing cylinder 12, which can push the circular tube into the semi-circular groove on the bottom surface of the riveting stripper plate.

[0021] The rebar pushing device includes a push rod fixing plate 31, a slider 32, a guide rail 33, a positioning pin 34, a rebar pin 35, and a rebar pushing cylinder 36. The positioning pin and the rebar pin are mounted on the push rod fixing plate, and the slider is fixedly connected to the push rod fixing plate. The rebar pushing cylinder drives the slider to move the positioning pin and the rebar pin. The rebar pin pushes the rebar at the rebar pushing position into the designated positions at both ends of the round tube at the riveting device.

[0022] The damping device includes a damping base 24, a damping baffle 25, a slide rail 26, a damping slide plate 27, and a coil spring 28. The damping slide plate is slidably connected to the slide rail, and the coil spring drives the damping slide plate to clamp the reinforcing bar. The damping slide plate is provided with a reinforcing bar clamping groove 29 and a positioning hole 30. The positioning hole is used to insert a positioning pin, and the reinforcing bar in the reinforcing bar clamping groove corresponds to the reinforcing bar pushed by the reinforcing bar pin.

[0023] The front end of the riveting lower mold is provided with a rebar insertion length positioning block 39. When the positioning pin tightens the rebar insertion length positioning block, the rebar pin pushes the rebar into the round tube, and the distance between the end of the rebar and the end of the round tube is 65mm±0.5mm.

[0024] The left and right ends of the steel bar insertion and riveting mechanism are also equipped with a material ejection cylinder 11. The material ejection cylinder drives the riveting stripping plate to realize the automatic feeding of the round tube.

[0025] Sensors are also installed on the left and right end rebar insertion and riveting mechanisms to detect the positioning status of the rebar and the round pipe.

[0026] The positioning pin of the rebar pusher is set parallel to the rebar pin. The length of the positioning pin is greater than the length of the rebar pin. The difference in length between the two is matched with the thickness of the damping base of the damping device to form the positioning dimension for the rebar insertion length.

[0027] The curvature of the circular tube limiting groove is adapted to the outer diameter of the circular tube. A circular tube baffle 22 is correspondingly provided on the riveting lower die. The circular tube baffle is provided with a beveled structure to guide the processed circular tube to automatically roll out of the equipment.

[0028] like Figure 1-11 As shown, the fully automatic pipe-end rebar insertion and riveting device of the present invention has the following specific working process: 1. Manually place the round pipe 4 to be processed into the round pipe storage bin 37, and place the steel bars to be inserted into the steel bar storage bins 13 at both ends respectively. After the sensors at each storage bin detect that the material is ready, the equipment enters the standby state. 2. Start the equipment. The circular tube pushing cylinder 12 of the circular tube storage and conveying device 5 is activated, pushing a circular tube 4 in the circular tube storage bin 37 into the circular tube limiting groove 21 of the riveting lower die 38. The circular tube baffle 22 limits the final position of the circular tube 4. The sensor at the riveting lower die 38 sends a signal after detecting that the circular tube 4 has reached the position. 3. The rebar pushing cylinder 36 drives the slider 32 to move along the guide rail 33, which drives the positioning pin 34 on the push rod fixing plate 31 and the rebar pin 35 to move synchronously. The positioning pin 34 passes through the positioning hole 30 of the damping device 14 until it is pressed against the rebar insertion length positioning block 39 at the front end of the riveting lower mold 38. At the same time, the rebar pin 35 pushes the rebar in the rebar storage bin 13, passes through the rebar clamping groove 29 of the damping device 14 and inserts into both ends of the round tube 4. 4. During the rebar pushing process, the line spring 28 of the damping device 14 is in a compressed state, driving the damping slide plate 27 to clamp the rebar along the slide rail 26, preventing the rebar from being pushed out of position due to the gap between it and the round tube 4. At this time, the difference between the thickness of the base of the damping device 14 and the length of the positioning pin 34 and the rebar pin 35 ensures that the distance between the end of the rebar and the end of the round tube is 65mm ± 0.5mm. 5. After both ends of the reinforcing bars are inserted into place, the lower cylinder 7 is activated, driving the lower platen 10 to press down. The guide post 19 is inserted into the limiting hole on the lower platen. The riveting stripper plate 18 moves down to the riveting lower mold 38. Then the fixing plate 17 continues to press down against the resistance of the return spring 20. The ejector pin 23 of the fixing plate cooperates with the riveting lower mold 38 to press the concave points at the corresponding positions at both ends of the round tube 4, thereby fixing the reinforcing bars to the round tube 4. 6. After the concave pressing is completed, the lower pressing cylinder 7 drives the lower pressing plate 10 to reset, the ejector cylinder 11 starts, and drives the finished product to be lifted upward. Under the thrust of the ejector cylinder 11 and the guiding action of the inclined side of the round tube baffle 22, the round tube 4 automatically rolls out of the equipment, completing one processing cycle. 7. The equipment repeats the above steps to achieve continuous automated processing.

[0029] In this embodiment, the round tube 4 has a specification of ∅14x2.0, the steel bar length is 167mm, the position of the steel bar insertion length positioning block 39 can be adjusted according to the actual processing size requirements, the spring force of the line spring 28 of the damping device 14 can be adapted to the clamping requirements of steel bars of different diameters, and the electrical control system of the equipment (not shown) is integrated into the frame 1 to control the action sequence of each cylinder and oil cylinder and the linkage of sensor signals.

[0030] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A fully automatic pipe-end rebar insertion and riveting device, comprising a frame (1), characterized in that, The frame (1) is symmetrically provided with a left end steel bar insertion riveting mechanism (2) and a right end steel bar insertion riveting mechanism (3) at both ends. The left-end inserted steel bar riveting mechanism (2) and the right-end inserted steel bar riveting mechanism (3) respectively include a riveting device, a round pipe storage and conveying device (5), a steel bar storage bin (13), a steel bar pushing device (15) and a damping device (14). The circular tube storage and conveying device (5) is used to store the circular tubes (4) and send the circular tubes (4) one by one into the riveting device in an orderly manner; The steel bar storage bin (13) is used to store steel bars and to send the steel bars one by one into the steel bar pushing position in an orderly manner; The rebar pusher (15) pushes the rebar at the push position into the designated positions at both ends of the round tube (4) at the rivet device; The damping device (14) is used to provide resistance to the pushed steel bars; The riveting device is used to rivet and press the inserted round pipe (4) and the inserted steel bar together.

2. The fully automatic pipe-end rebar insertion and riveting device according to claim 1, characterized in that, The riveting device includes a riveting mold and a jaw frame (6). The riveting mold includes a lower riveting mold (38), a cover plate (16), and a fixing plate (17). A bottom plate (8) is provided at the bottom of the jaw of the jaw frame (6), and a top plate (9) is provided at the top of the jaw of the jaw frame (6). A pressing cylinder (7) is installed on the top plate (9). The bottom output end of the pressing cylinder (7) is fixedly connected to the pressing plate (10). A cover plate (16) is fixedly installed at the bottom of the pressing plate (10). The cover plate (16) and the fixing plate (17) are connected together. 7) Fixed connection, a guide post (19) and an ejector pin are fixedly installed on the fixed plate (17), a riveting stripper plate (18) is installed at the lower part of the guide post (19), the riveting stripper plate (18) moves along the guide post, a reset spring (20) is connected between the riveting stripper plate (18) and the fixed plate (17), the bottom plate (8) is provided with a riveting lower mold (38), the upper surface of the riveting lower mold (38) and the bottom surface of the riveting stripper plate (18) are respectively provided with semi-circular grooves, and the two semi-circular grooves form a circular tube limiting pressure groove (21).

3. The fully automatic pipe-end rebar insertion and riveting device according to claim 2, characterized in that, The circular tube storage and conveying device (5) includes a circular tube storage bin (37) and a circular tube pushing cylinder (12). The circular tube pushing cylinder (12) can push the circular tube (4) into the semi-circular groove on the bottom surface of the riveting stripper plate (18).

4. The fully automatic pipe-end rebar insertion and riveting device according to claim 1, characterized in that, The rebar pushing device (15) includes a push rod fixing plate (31), a slider (32), a guide rail (33), a positioning pin (34), a rebar pin (35), and a rebar pushing cylinder (36). The positioning pin (34) and the rebar pin (35) are mounted on the push rod fixing plate (31). The push rod fixing plate (31) is fixedly connected to the slider (32). The rebar pushing cylinder (36) drives the slider (32) to move the positioning pin (34) and the rebar pin (35). The rebar pin (35) pushes the rebar at the rebar pushing position into the designated positions at both ends of the round tube (4) at the riveting device.

5. The fully automatic pipe-end rebar insertion and riveting device according to claim 4, characterized in that, The damping device (14) includes a damping base (24), a damping baffle (25), a slide rail (26), a damping slide plate (27), and a wire spring (28). The damping slide plate (27) is slidably connected to the slide rail (26). The wire spring (28) drives the damping slide plate (27) to clamp the reinforcing bar. The damping slide plate (27) is provided with a reinforcing bar clamping groove (29) and a positioning hole (30). The positioning hole (30) is used to insert a positioning pin (34). The reinforcing bar that is pushed by the reinforcing bar pin (35) passes through the reinforcing bar clamping groove (29).

6. The fully automatic pipe-end rebar insertion and riveting device according to claim 4, characterized in that, The riveting lower mold (38) is provided with a rebar insertion length positioning block (39) at the front end. When the positioning pin (34) presses against the rebar insertion length positioning block (39), the rebar pin (35) pushes the rebar into the round tube (4), and the distance between the end of the rebar and the end of the round tube is 65mm ± 0.5mm.

7. The fully automatic pipe end-reinforcing bar insertion and riveting device according to claim 4, characterized in that, The left end insert steel bar riveting mechanism (2) and the right end insert steel bar riveting mechanism (3) are also equipped with a material ejection cylinder (11). The material ejection cylinder (11) drives the riveting stripping plate (18) to realize the automatic feeding of the round tube (4).

8. The fully automatic pipe-end rebar insertion and riveting device according to claim 4, characterized in that, Sensors are also provided on the left end steel bar riveting mechanism (2) and the right end steel bar riveting mechanism (3) to detect the position of the steel bar and the round pipe (4).

9. The fully automatic pipe-end rebar insertion and riveting device according to claim 4, characterized in that, The positioning pin (34) of the rebar pusher (15) is set parallel to the rebar pin (35). The length of the positioning pin (34) is greater than the length of the rebar pin (35). The length difference between the two is matched with the thickness of the damping base (24) of the damping device (14) to form the positioning dimension of the rebar insertion length.

10. The fully automatic pipe-end rebar insertion and riveting device according to claim 2, characterized in that, The arc of the circular tube limiting groove (21) is adapted to the outer diameter of the circular tube (4). A circular tube baffle (22) is correspondingly provided on the riveting lower mold (38). The circular tube baffle (22) is provided with a bevel structure to guide the processed circular tube (4) to automatically roll out of the equipment.

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