Automatic pipe fitting bending machine

Abstract

The invention relates to the technical field of baby carriage production, in particular to an automatic pipe fitting bending machine. The pipe fitting bending machine comprises a workbench, a feeding mechanism, a bending mechanism and a limiting mechanism, the feeding mechanism achieves accurate positioning of a pipe fitting through a feeding groove, the bending mechanism completes bending of the pipe fitting through relative movement of a driving die and a driven die, and the limiting mechanism ensures that the pipe fitting is kept stable in the bending process; in addition, a discharging mechanism is further arranged, the bent pipe fittings can be automatically collected into a material collecting frame, meanwhile, the discharged pipe fittings are intermittently conveyed, and the situation that the pipe fittings fall from a high position and are scratched is avoided; the device achieves the effects of improving the production efficiency, reducing the labor cost and ensuring the product quality.

Description

Technical Field

[0001] The present application relates to the technical field of baby carriage production, and in particular to an automatic pipe bending machine. Background Art

[0002] In the production process of baby strollers, the processing of metal pipes is one of the key links, especially for the frame part of the baby bed, which requires a large number of metal pipes, and these pipes often need to be bent into specific shapes to meet the splicing requirements.

[0003] The bending machine is mainly used to bend the diameter of metal pipes. The traditional bending machine generally includes a workbench, on which a bending die assembly is arranged. The bending die assembly includes a driven die fixedly arranged on the workbench, a driven die slidably arranged on the workbench, and a cylinder driving the active die to slide. The active die and the driven die are provided with arc-shaped positioning grooves on the two side walls close to each other. The positioning grooves on the active die and the driven die are both semicircular, and the telescopic shaft of the cylinder is connected to the active die. When bending a pipe, first place the pipe fitting in the positioning groove of the driven die, then start the cylinder to drive the active die to slide. When the active die abuts against the pipe fitting, the pipe fitting is positioned. At this time, the pipe fitting is released, and the cylinder continues to push forward. The pipe fitting is bent into a shape corresponding to the positioning groove with the cooperation of the two positioning grooves.

[0004] With regard to the above-mentioned related technologies, during the pipe bending process, workers are required to manually load the pipe fittings, and manual support is also required during the bending process, which is not only inefficient but also poses a safety hazard. Summary of the invention

[0005] In order to improve the production efficiency of a pipe bending machine, the present application provides an automatic pipe bending machine.

[0006] The present application provides an automatic pipe bending machine, which adopts the following technical solution: An automatic pipe bending machine comprises a workbench, a feeding mechanism, a bending mechanism and a limiting mechanism; the feeding mechanism comprises two brackets arranged parallel to each other on the workbench, a feeding cavity is formed between the two brackets, and feeding grooves are arranged on the side walls of the two brackets facing the feeding cavity, and both ends of the pipe are slidably clamped in the feeding grooves; The bending mechanism comprises an active die, a driven die and a first power member which are slidably arranged on the workbench, the first power member can drive the active die to slide towards or away from the driven die, the active die is provided with a first positioning groove for clamping the tube member, the driven die is provided with a second positioning groove for clamping the tube member, the active die slides under the feeding chute, when the active die approaches and abuts against the driven die, the tube member is clamped in the first positioning groove and the second positioning groove, and is bent into a corresponding shape; The limiting mechanism includes a limiting rod slidably arranged on the workbench, and a second power member driving the limiting rod to approach or move away from the active mold. The passive mold is provided with a giving groove for the limiting rod to slide, and the limiting rod is provided with a limiting groove for clamping the pipe fitting on the side facing the active mold; when the active mold slides in a direction away from the passive mold and is offset from the position of the opening below the feeding chute in a horizontal projection, the pipe fitting can fall to one side of the first positioning groove, and the limiting rod sliding toward the active mold can drive the pipe fitting to be clamped into the first positioning groove.

[0007] By adopting the above technical solution, the pipe fitting is placed in the feeding trough, and when the active mold slides in the direction away from the driven mold and is offset from the opening below the feeding trough in the horizontal projection, the pipe fitting slides downward under the action of gravity and falls on the side of the first positioning groove close to the driven mold, thereby realizing automatic feeding of the pipe fitting; at this time, the second power member drives the limit rod to slide toward the active mold to press against the pipe fitting, and the pipe fitting is clamped into the limit groove and the first positioning groove, and in the process of the active mold moving to cooperate with the driven mold to compress the pipe fitting, the limit rod can slide and cooperate to always press against the pipe fitting, thereby ensuring the stability of the pipe fitting during the bending process, and also replacing the process of manual hand support; the automatic pipe bending machine realizes automatic feeding, positioning and bending operations of the pipe fitting by integrating the workbench, the feeding mechanism, the bending mechanism and the limit mechanism, thereby improving the degree of automation of pipe bending, reducing manual operation and improving work efficiency.

[0008] Optionally, the bracket is provided with a first loading plate and a second loading plate parallel to each other on the side wall facing the loading chamber, the loading trough is formed between the first loading plate and the second loading plate, the upper surface of the first loading plate is connected with a guide plate, the guide plate is arranged upwardly inclined away from the second loading plate, when the pipe is placed on the guide plate, it can slide along the guide plate and fall into the loading trough, and a sliding space for the active mold to slide is formed between the bottom of the first loading plate and the second loading plate and the bracket.

[0009] By adopting the above technical solution, a setting method of the feeding trough is disclosed, and a guide plate is added at the same time. When the feeding time pipe is placed on the guide plate, it can slide into the feeding trough along the guide plate, which simplifies the feeding process and facilitates the production line to realize feeding automation.

[0010] Optionally, a positioning seat is provided on the side of the bracket facing away from the loading chamber, a positioning bolt is provided on the positioning seat, and a waist-shaped hole is opened on the positioning seat for the positioning bolt to pass through, and the waist-shaped hole extends toward the loading chamber. The positioning bolt can pass through the waist-shaped hole and be threadedly connected to the workbench.

[0011] By adopting the above technical solution, the setting of the positioning seat and the positioning bolt, and the extension design of the waist-shaped hole, the position of the bracket on the workbench can be flexibly adjusted, thereby enhancing the versatility of the automatic pipe bending machine and being suitable for processing pipes of different lengths.

[0012] Optionally, the second power member is a second cylinder, a connecting seat is provided on the telescopic shaft of the second cylinder, a connecting rod is provided on the end of the limit rod away from the active mold, a connecting groove for the connecting rod to slide and insert is provided on the connecting seat, an anti-slip block is provided on the side wall of the connecting rod, an anti-slip groove for the anti-slip block to slide is provided in the connecting seat, a first spring is provided between the limit rod and the connecting seat, and when the anti-slip block abuts against the side wall of the anti-slip groove close to the active mold, the first spring is in a compressed state.

[0013] By adopting the above technical solution, when the tube is bent, the active die moves away from the passive die, and the limit rod and the connecting rod pop out toward the active die under the elastic force of the first spring, thereby driving the tube to be ejected from the second positioning groove, so that the bent tube falls smoothly.

[0014] Optionally, the limiting mechanism also includes a limiting block, a connecting shaft and a tension spring arranged on the bracket, the bracket is provided with a first shaft on the side facing the driven mold, and the bracket is provided with a second shaft on the side away from the feeding chamber; the limiting block is rotatably arranged on the first shaft, the connecting shaft is arranged on the limiting block, one end of the tension spring is connected to the second shaft, and the other end of the tension spring is connected to the connecting shaft; the limiting block has a first abutting surface and a second abutting surface, when the tension spring drives the limiting block to rotate toward the direction of the bracket, the first abutting surface can abut against the side wall of the second feeding plate, and the second abutting surface can abut against the side wall of the pipe falling in the sliding space, and the tension spring is in a stretched state.

[0015] By adopting the above technical solution, when the active mold slides in the direction away from the driven mold and slides into the rear of the feeding trough, the limit block rotates upward under the action of the tension spring, and can abut against the side wall of the second feeding plate, and abut against the pipe fitting through the second abutting surface, thereby positioning the pipe fitting and further improving the stability of the pipe fitting.

[0016] Optionally, it also includes a material unloading mechanism, which includes a material collection frame, a conveyor belt and a linkage assembly, the conveyor belt includes an active roller and a driven roller rotatably arranged on the workbench, and also includes a conveyor belt body wound around the outside of the active roller and the driven roller, and a plurality of receiving plates spaced apart on the conveyor belt body, the active die can drive the active roller to rotate intermittently through the linkage assembly; a material unloading port is opened on the workbench, and when the pipe is bent, it can pass through the material unloading port and fall onto the receiving plate of the conveyor belt, and can fall into the material collection frame as the receiving plate moves.

[0017] By adopting the above technical solution, the setting of the unloading mechanism, including the collection frame, conveyor belt and linkage assembly, realizes the automatic collection and transportation of the bent pipes, and at the same time can prevent the pipes from falling directly, which may cause damage to the pipes due to collision.

[0018] Optionally, the linkage assembly includes a rotating block rotatably arranged on the workbench, the rotating block is polygonal, the rotating block is coaxially connected to the active roller, and a rotating groove for the rotating block to rotate is provided on the workbench; the linkage assembly also includes a driving rod slidably arranged on the workbench, and a linkage rod connected between the driving rod and the active mold, and a sliding groove for the driving rod to slide is provided on the workbench, and the extension direction of the sliding groove is parallel to the sliding direction of the active mold, and the sliding groove is communicated with the rotating groove, and the linkage assembly also includes a spring-loaded part that drives the rotating block to slide in the direction of the driving groove; when the active mold is located at an end away from the driven mold, the spring-loaded part drives the corner of the rotating block to enter the sliding groove, and when the active mold slides in the direction of the driven mold, it can drive the rotating block to rotate.

[0019] By adopting the above technical solution, each time the active mold slides toward the driven mold, the driving rod can be driven to slide toward the rotating groove once through the connecting rod, thereby driving the rotating block to rotate a certain angle, and driving the active roller to rotate through the rotating block, thereby driving the receiving plate to move a certain distance forward.

[0020] Optionally, the spring-pressing part includes a spring-pressing column and a second spring, the workbench is provided with an installation groove for the spring-pressing column to slide and insert, the second spring is arranged between the bottom wall of the installation groove and the spring-pressing column, the spring-pressing column is provided with an arc-shaped column head at one end facing away from the second spring, and the rotating block is provided with an arc-shaped groove for the arc-shaped column head to insert, when the side wall of the rotating block facing the sliding groove is parallel to the sliding groove, the arc-shaped column head is located on the side of the arc-shaped groove close to the sliding groove, and can be inserted into the arc-shaped groove under the elastic force of the second spring.

[0021] By adopting the above technical solution, when the arc-shaped column head is inserted into the arc-shaped groove under the action of the second spring, during the insertion process, the rotating block is driven to move a certain angle toward the sliding groove, so that the corners of the sliding block extend into the sliding groove and can be driven to rotate by the driving rod next time.

[0022] Optionally, the driving rod is rotatably connected to a rotating wheel at a corner of the sliding slot.

[0023] By adopting the above technical solution, the rotating wheel rotatably connected at the corner of the driving rod reduces the friction resistance between the driving rod and the rotating block during the sliding process, making the movement of the linkage assembly smoother and more efficient.

[0024] Optionally, a buffer plate is provided in the material collection frame for sliding up and down, and a plurality of third springs are provided between the buffer plate and the bottom of the material collection frame.

[0025] By adopting the above technical solution, when there are no pipes or fewer pipes in the material collection frame, the buffer plate is located at the upper end of the material collection frame under the action of the third spring. When the pipes fall from the receiving plate into the material collection frame, the falling height is shorter and the impact force is smaller. At the same time, the pipes can also be buffered by the buffer plate to prevent deformation or damage of the pipes due to impact. As more pipes fall into the material collection frame, the buffer plate moves downward due to the force and can continuously receive the materials.

[0026] In summary, the present application includes at least one of the following beneficial effects: 1. Through the cooperation of the feeding mechanism, bending mechanism and limiting mechanism, the automatic feeding, positioning and bending operations of the pipe fittings are realized, which greatly improves the automation degree and work efficiency of the pipe bending; 2. By adding a feeding mechanism, continuous feeding of pipe fittings can be achieved, while avoiding scratches and other problems that may be caused by pipe fittings sliding from a high place, thereby improving production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a structural schematic diagram of the bending mechanism; Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at C in the middle; Figure 4 yes Figure 1 Schematic diagram of the enlarged structure at A and B in the middle; Figure 5 It is a structural diagram of the unloading mechanism; Figure 6 It is a structural schematic diagram of the linkage assembly; Figure 7 yes Figure 6Schematic diagram of the enlarged structure at D in the middle; Figure 8 It is a schematic diagram of the cross-sectional structure of the aggregate frame.

[0028] Description of reference numerals: 1. workbench; 11. feeding port; 12. rotating groove; 13. sliding groove; 2. feeding mechanism; 21. bracket; 211. first feeding plate; 212. second feeding plate; 213. guide plate; 214. first shaft; 215. second shaft; 22. feeding cavity; 23. feeding groove; 24. positioning seat; 241. positioning bolt; 242. waist-shaped hole; 3. bending mechanism; 31. active mold; 32. driven mold; 33. first power member; 4. limiting mechanism; 41. limiting rod; 42. second power member; 43. connecting seat; 44. connecting rod; 45. anti-slip block; 46 , first spring; 47, limit block; 471, first abutment surface; 472, second abutment surface; 48, linkage shaft; 49, tension spring; 5, unloading mechanism; 51, collecting frame; 511, buffer plate; 512, third spring; 52, conveyor belt; 521, conveyor belt body; 522, active roller; 523, driven roller; 524, receiving plate; 53, linkage assembly; 531, rotating block; 5311, arc groove; 5312, central rotating shaft; 532, driving rod; 5321, rotating wheel; 533, linkage rod; 534, spring-pressing member; 5341, spring-pressing column; 5342, second spring. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-8 This application is described in further detail.

[0030] Embodiment 1: The present application embodiment discloses an automatic pipe bending machine. Figure 1 and Figure 2 The automatic bending machine includes a workbench 1, a feeding mechanism 2, a bending mechanism 3 and a limiting mechanism 4. Specifically, the feeding mechanism 2 includes two brackets 21 arranged parallel to each other on the workbench 1, a feeding cavity 22 is formed between the two brackets 21, and a feeding groove 23 is arranged on the side walls of the two brackets 21 facing the feeding cavity 22, and both ends of the pipe fitting are slidably connected in the feeding groove 23. Preferably, the feeding groove 23 is arranged along the vertical direction, so that the pipe fittings can be stacked along the extension direction of the feeding groove 23.

[0031] The bending mechanism 3 includes an active die 31, a passive die 32 and a first power member 33 which are slidably arranged on the workbench 1. The passive die 32 is preferably arranged outside the feeding cavity 22, the active die 31 is arranged between the two brackets 21, and the first power member 33 can be a first cylinder, which is fixed on the workbench 1 and located between the two brackets 21, and the end of the telescopic shaft of the first cylinder is fixed to the side wall of the active die 31 away from the passive die 32, so that the first cylinder is started to drive the active die 31 to slide in the direction close to or away from the passive die 32. The two opposite side walls of the active die 31 and the passive die 32 are used to clamp the bent pipe fittings. Specifically, a first positioning groove for clamping the pipe fittings is provided on the side wall of the active die 31 facing the passive die 32, and a second positioning groove for clamping the pipe fittings is provided on the side wall of the passive die 32 facing the active die 31. The cross-sections of the first positioning groove and the second positioning groove are semicircular grooves. When the active die 31 and the passive die 32 are in contact with each other, the pipe fittings can be bent into a specific arc shape by the first positioning groove and the second positioning groove, that is, the pipe fittings can be bent into a corresponding shape.

[0032] The limiting mechanism 4 includes a limiting rod 41 slidably arranged on the workbench 1, and a second power member 42 driving the limiting rod 41 to approach or move away from the active mold 31. The second power member 42 can be a second cylinder, the limiting rod 41 is a rectangular rod, a clearance groove for the limiting rod 41 to slide is provided at the center of the passive mold 32, and a limiting groove for clamping the pipe fitting is provided on the side of the limiting rod 41 facing the active mold 31, and the limiting rod 41 can slide until the clearance groove is connected to the second positioning groove. When the active mold 31 slides in the direction away from the passive mold 32 and is offset from the opening below the feeding chute 23 in the horizontal projection, the pipe fitting slides downward under the action of gravity and falls on the side of the first positioning groove close to the passive mold 32. At this time, the second cylinder drives the limiting rod 41 to slide in the direction of the active mold 31, and through the limiting groove clamping the pipe fitting, drives the other side of the pipe fitting to be clamped into the first positioning groove, thereby positioning the pipe fitting on the active mold 31, replacing the worker's hand-held positioning method with a belt; the first cylinder extends When the retractable shaft extends out, driving the active die 31 to move toward the driven die 32, the telescopic shaft of the second cylinder contracts, and synchronously drives the limit rod 41 to retract toward the driven die 32. During this process, the limit rod 41 can always keep the pipe stably abutting against the first positioning groove; when the pipe is deformed as the active die 31 approaches the driven die 32, and the active die 31 and the driven die 32 are fitted together, the bending of the pipe is completed, and at this time the limit rod 41 is also completely received in the driven die 32, and the limit groove is connected with the second positioning groove.

[0033] Reference Figure 1 and Figure 2In the embodiment of the present application, the bracket 21 is a rectangular plate-shaped structure and is arranged on the workbench 1 along the vertical direction. The side wall of the bracket 21 facing the feeding chamber 22 is fixed with a first feeding plate 211 and a second feeding plate 212 which are parallel to each other, and a feeding trough 23 is formed between the two feeding plates; wherein the second feeding plate 212 is located on the side of the feeding trough 23 close to the driven mold 32 and is arranged at a position close to the side of the bracket 21, and the first feeding plate 211 is located on the side of the feeding trough 23 away from the driven mold 32. The upper surface of the first feeding plate 211 is connected with a guide plate 213, and the guide plate 213 is arranged upwardly in a direction away from the second feeding plate 212, so that the guide plate 213 forms a feeding area at a far end position away from the second feeding plate 212. During processing, the pipe fittings can be placed on the guide plate 213, and the pipe fittings slide along the guide plate 213 and fall into the feeding trough 23.

[0034] At the same time, there is a gap between the bottom of the first loading plate 211 and the second loading plate 212 and the bracket 21, forming a sliding space for the active mold 31 to slide. The height of the sliding space is the same as the thickness of the active mold 31, and the outer diameter of a single tube is slightly smaller than the height of the sliding space; so that when the active mold 31 slides through the sliding space, the upper surface of the active mold 31 abuts against the tube located in the loading trough 23, which can limit the falling of the tube; when the active mold 31 slides in the direction away from the driven groove and the front end of the active mold 31 is offset from the loading trough 23, the tube is unloaded into the sliding space, and due to the height limitation, only one tube can fall at a time.

[0035] Reference Figure 1 and Figure 2 In an optional embodiment, a positioning seat 24 is provided on the side of the bracket 21 away from the feeding chamber 22, and a positioning bolt 241 is provided on the positioning seat 24; the positioning seat 24 includes a vertical plate and a horizontal plate connected to each other, the side wall of the vertical plate is welded to the side wall of the bracket 21, and a waist-shaped hole 242 for the positioning bolt 241 to pass through is provided on the horizontal plate, and the waist-shaped hole 242 extends toward the feeding chamber 22, and a threaded hole for the positioning bolt 241 to be threadedly connected is provided on the workbench 1; the positioning bolt 241 can pass through the waist-shaped hole 242 and be threadedly connected to the workbench 1. This design allows the bracket 21 to adjust the position of the bracket 21 within a certain range, adapt to pipes of different lengths, and improve the applicability of the equipment. Further preferably, a plurality of threaded holes can be provided at intervals along the width direction of the workbench 1, that is, along the extension direction of the waist-shaped hole 242, so as to further increase the adjustment range. At the same time, correspondingly, both the active mold 31 and the driven mold 32 can be detachably connected and replaced by bolts to meet different processing requirements.

[0036] Reference Figure 2 and Figure 3In an optional embodiment, when the tube is bent, the active die 31 moves away from the passive die 32. At this time, a limit rod 41 can be set to automatically push the bent tube out of the second positioning groove to ensure smooth material feeding. Specifically, a connecting rod 44 is fixed to the end of the limit rod 41 away from the active die 31. The connecting rod 44 is preferably a round rod. A connecting seat 43 is fixed to the telescopic shaft of the second cylinder. The connecting seat 43 is provided with a connecting groove for the connecting rod 44 to slide and plug in. An anti-slip block 45 is provided on the side wall of the connecting rod 44. An anti-slip groove for the anti-slip block 45 to slide is provided in the connecting seat 43. The extension direction of the anti-slip groove is parallel to the sliding direction of the active die 31. A first spring 46 is provided between the side wall of the limit rod 41 and the side wall of the connecting seat 43, and the connecting rod 44 passes through the first spring 46. When the anti-slip block 45 abuts against the side wall of the anti-slip groove close to the active die 31, the first spring 46 is in a compressed state. When the limiting rod 41 extends out to abut the pipe fitting and the pipe fitting is bent, under the double-sided abutment of the pipe fitting and the second cylinder, the anti-slip block 45 always abuts against the side of the anti-slip groove away from the active die 31, and the limiting rod 41 and the connecting rod 44 are in a short rod state; when the bending is completed, the active die 31 is away from the driven die 32, and the limiting rod 41 and the connecting rod 44 are ejected toward the active die 31 under the elastic force of the first spring 46, thereby driving the pipe fitting to be ejected from the second positioning groove, so that the bent pipe fitting falls smoothly.

[0037] Reference Figure 1 and Figure 4 In an optional embodiment, the limiting mechanism 4 further includes an upper limit block 47, a linkage shaft 48 and a tension spring 49 arranged on the bracket 21. Specifically, a first shaft 214 is fixed on the side of the bracket 21 facing the driven mold 32, and the first shaft 214 is located below the second blanking plate; the axial direction of the first shaft 214 is parallel to the length direction of the pipe fitting, one end of the limiting block 47 is arranged on the first shaft 214, the linkage shaft 48 is fixed on the side wall of the limiting block 47 away from the feeding cavity 22, and the linkage shaft 48 extends in a direction away from the feeding cavity 22; a second shaft 215 is fixed on the side wall of the bracket 21 away from the feeding cavity 22, and the tension spring 49 has a spring body in the middle, and has metal rings at both ends, wherein the metal ring at one end is sleeved on the second shaft 215, and the metal ring at the other end is sleeved on the linkage shaft 48. A slot is provided on one side of the limit block 47 facing the support, so that the limit block 47 has a first abutting surface 471 and a second abutting surface 472. When the tension spring 49 drives the limit block 47 to rotate toward the bracket 21, the first abutting surface 471 can abut against the side wall of the second loading plate 212 away from the loading trough 23, and the second abutting surface 472 can abut against the side wall of the pipe falling in the sliding space. The tension spring 49 is in a stretched state, which can drive the limit block 47 to press against the bracket 21.

[0038] Through the above structure, when the active mold 31 slides to the bottom of the second unloading plate in the direction away from the driven mold 32, the limit block 47 rotates upward under the elastic force of the tension spring 49, so that the first abutting surface 471 abuts against the second loading plate 212; then the active mold 31 continues to slide back, and the pipe fitting can fall from the loading groove 23 to the sliding space. At this time, due to the existence of the limit block 47, the pipe fitting will not slide toward the driven mold 32. After the pipe fitting falls, the limit rod 41 slides out to abut the side wall of the pipe fitting; when the active mold 31 slides toward the driven mold 32, the force of the pipe fitting moving forward drives the limit block 47 to flip downward, the tension spring 49 is continuously stretched, and the pipe fitting and the active mold 31 can smoothly pass through the limit block 47. The further limitation of the limit block 47 can improve the stability and accuracy of the positioning of the pipe fitting.

[0039] The implementation principle of the automatic tube bending machine of the embodiment of the present application is as follows: the tube is placed on the guide plate 213 and can enter the loading trough 23 along the guide plate 213 to complete the tube loading; then, the active die 31 is controlled to slide in a direction away from the passive die 32, and the tube located at the bottom moves downward under the action of gravity and falls on the workbench 1 and is located outside the active die 31. At this time, the limit block 47 rotates upward under the action of the tension spring 49, and its second abutting surface 472 abuts against the tube to prevent the tube from moving; at the same time, the limit rod 41 is driven by the second cylinder to slide toward the active die 31 to abut against the side wall of the tube, driving the tube to be clamped into the first The active die 31 is then driven by the first cylinder to move toward the driven die 32, and at the same time, the telescopic shaft of the second cylinder is shortened, the active die 31 and the limit rod 41 clamp the pipe fitting, and drive the pipe fitting to move toward the driven die 32; when the pipe fitting abuts against the driven die 32, the other side of the pipe fitting is inserted into the second positioning groove, the active die 31 continues to move forward, and the pipe fitting is bent into a corresponding arc; after the active die 31 and the driven die 32 are completely abutted, the bending is completed, the active die 31 retreats, and the limit rod 41 extends one end distance toward the active die 31 under the elastic force of the first spring 46, thereby pushing the pipe fitting out of the second positioning groove, and the pipe fitting can fall to complete the unloading.

[0040] Embodiment 2: The difference between this embodiment and the above embodiment is that a material unloading mechanism 5 is added. Figure 1 and Figure 5, the unloading mechanism 5 includes a material collection frame 51, a conveyor belt 52 and a linkage assembly 53. Among them, the interior of the workbench 1 is hollow, and the material collection frame 51 and the conveyor belt 52 are both arranged inside the workbench 1. The conveyor belt 52 is arranged above the material collection frame 51, and the conveyor belt 52 is arranged obliquely, and its lower part is aligned with the material collection frame 51; the conveyor belt 52 includes an active roller 522 and a driven roller 523 rotatably arranged on the workbench 1, and also includes a conveyor belt body 521 wound around the outside of the active roller 522 and the driven roller 523, and a plurality of material receiving plates 524 fixed on the conveyor belt body 521 at intervals, and the material receiving plates 524 can be rectangular plates or arc-shaped plates, and the material receiving plates 524 extend along the width direction of the conveyor belt body 521; the active mold 31 can drive the active roller 522 to rotate intermittently through the linkage assembly 53. A material discharge port 11 is provided on the workbench 1. After the pipe is bent, it can pass through the material discharge port 11 and fall onto the receiving plate 524 of the conveyor belt 52. At the same time, the active roller 522 intermittently rotates to drive the conveyor belt body 521 to intermittently rotate, thereby driving the receiving plate 524 to move intermittently, and the pipe can fall into the collecting frame 51 as the receiving plate 524 moves.

[0041] Reference Figure 5 and Figure 6 Specifically, the linkage assembly 53 includes a rotating block 531 rotatably arranged on the workbench 1, and a rotating groove 12 for the rotating block 531 to rotate is correspondingly opened on the workbench 1; the rotating block 531 is polygonal, and in this embodiment, the rotating block 531 is preferably arranged as a square block structure, and a central rotating shaft 5312 is fixed at the center position of the rotating block 531, one end of the central rotating shaft 5312 is rotatably connected to the workbench 1 by a bearing or the like, and the other end passes through the rotating block 531 and is coaxially connected to the active roller 522.

[0042] The linkage assembly 53 also includes a driving rod 532 slidably disposed on the workbench 1, and a linkage rod 533 connected between the driving rod 532 and the active mold 31. The workbench 1 is provided with a sliding groove 13 for the driving rod 532 to slide, and a yielding groove for the linkage rod 533 to slide; the extension direction of the sliding groove 13 is parallel to the sliding direction of the active mold 31, so that when the active mold 31 moves forward and backward, it can drive the driving rod 532 to move synchronously in the sliding groove 13; the sliding groove 13 is connected to the rotating groove 12. The linkage assembly 53 also includes a spring-loaded member 534 that drives the rotating block 531 to slide toward the sliding groove 13. When the active mold 31 is located at the end away from the driven mold 32, the end of the driving rod 532 close to the rotating groove 12 escapes from the range of the rotating groove 12, and the spring-loaded member 534 can drive the corner of the rotating block 531 to rotate into the sliding groove 13.

[0043] Specifically, the spring-pressing member 534 includes a spring-pressing column 5341 and a second spring 5342. A mounting groove for the spring-pressing column 5341 to be slidably inserted is provided on the workbench 1. The second spring 5342 is fixed between the bottom wall of the mounting groove and the spring-pressing column 5341. An arc-shaped column head is provided at one end of the spring-pressing column 5341 away from the second spring 5342. The arc of the arc-shaped column head is preferably semicircular. An arc-shaped groove 5311 for the arc-shaped column head to be inserted is provided on the rotating block 531. When the side wall of the rotating block 531 facing the sliding groove 13 is parallel to the extending direction of the sliding groove 13, the arc-shaped column head is located on the side of the arc-shaped groove 5311 close to the sliding groove 13, and can be inserted into the arc-shaped groove 5311 under the elastic force of the second spring 5342. Four arc-shaped grooves 5311 are arranged at intervals along the circumference of the rotating block 531 , so that when each side wall of the circumference of the rotating block 531 is parallel to the sliding groove 13 , the arc-shaped column heads can be inserted into the arc-shaped grooves 5311 .

[0044] When the active die 31 slides in the direction away from the driven die 32, the driving rod 532 simultaneously slides in the direction away from the rotating groove 12. At this time, the side wall of the rotating block 531 is separated from the side wall of the driving rod 532. The spring column 5341 pops out in the direction of the arc groove 5311 under the action of the second spring 5342. Since the arc column head cooperates with the arc surface of the arc groove 5311, the spring column 5341 can be inserted into the arc groove 5311, and at the same time, the rotating block 531 is driven to rotate a small angle in the direction of the sliding groove 13, so that the corner of the rotating block 531 is partially transferred into the sliding groove 13. Then, when the active die 31 moves in the direction of the driven die 32 to bend the pipe fitting, the driving rod 5 32 synchronously moves forward toward the rotating groove 12 and abuts against the side wall of the rotating block 531, thereby driving the rotating block 531 to rotate a certain angle. In this embodiment, since the rotating block 531 is square, it can drive the rotating block 531 nearly 90 degrees, that is, the other side wall of the rotating block 531 is rotated to fit with the driving rod 532; at this time, it can drive the central shaft 5312 to rotate, thereby driving the conveyor body 521 to rotate a certain distance through the active roller 522. Preferably, the distance can be the distance of moving through a receiving plate 524; in other embodiments, it can also be completed by multiple rotations. The moving distance of a receiving plate 524, at this time, a receiving plate 524 can bear multiple pipes. As the active die 31 continuously bends the pipes, the receiving plate 524 continuously moves intermittently in the oblique downward direction to approach the collection frame 51, until the receiving plate 524 rotates to the bottom of the conveyor body 521, and the pipes fall off the receiving plate 524 and fall into the collection frame 51.

[0045] Reference Figure 6 and Figure 7Optionally, the driving rod 532 is connected to a rotating wheel 5321 and rotates toward the corner of the sliding groove 13. When the driving rod 532 slides toward the direction close to the rotating groove 12, the side wall of the rotating wheel 5321 abuts against the corner of the rotating block 531, thereby reducing the friction between the driving rod 532 and the rotating block 531 and making the driving rod 532 slide more smoothly.

[0046] Reference Figure 5 and Figure 8 In the embodiment of the present application, further optionally, a buffer plate 511 is provided in the material collection frame 51 for sliding up and down, a guide block can be provided on the side wall of the buffer plate 511, and a guide groove is provided on the side wall of the material collection frame 51 along the vertical direction; a plurality of third springs 512 are provided at intervals between the buffer plate 511 and the bottom of the material collection frame 51. This design enables that when there are no pipes or fewer pipes in the material collection frame 51, the buffer plate 511 is located at the upper end of the material collection frame 51 under the action of the third spring 512, and when the pipes fall from the material receiving plate 524 into the material collection frame 51, the falling height is short and the impact force is small. At the same time, the buffer plate 511 can also be used to buffer the pipes, thereby preventing the pipes from being deformed or damaged due to impact; as more pipes fall into the material collection frame 51, the buffer plate 511 moves downward under the force, and can continuously receive the materials. Optionally, an elastic pad can also be provided on the surface of the buffer plate 511 to further reduce the impact force.

[0047] The implementation principle of an automatic pipe bending machine in the embodiment of the present application is as follows: by adding a feeding mechanism 5, the automatic collection and transportation of the pipes after bending is realized; the design of the feeding mechanism 5 enables the pipes to fall smoothly from the feeding port 11 onto the conveyor belt 52, and fall into the collection frame 51 as the conveyor belt 52 moves. The linkage assembly 53 is triggered by the action of the active mold 31, and the intermittent rotation of the conveyor belt 52 can be realized without adding any extra power elements, so that the pipes continuously fall onto different receiving plates 524, and are gradually fed into the collection frame 51 as the receiving plates 524 rotate. The entire feeding process has a high degree of automation, which reduces the intensity of manual labor, improves production efficiency, and also reduces possible scratches that may occur during the feeding process of the pipes.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic pipe bending machine, characterized in that: The invention comprises a workbench (1), a feeding mechanism (2), a bending mechanism (3) and a limiting mechanism (4); the feeding mechanism (2) comprises two brackets (21) arranged parallel to each other on the workbench (1), a feeding cavity (22) is formed between the two brackets (21), and feeding grooves (23) are arranged on the side walls of the two brackets (21) facing the feeding cavity (22), and both ends of the pipe fitting are slidably engaged in the feeding grooves (23); The bending mechanism (3) comprises an active die (31), a passive die (32) and a first power member (33) which are slidably arranged on the workbench (1); the first power member (33) can drive the active die (31) to slide in a direction approaching or away from the passive die (32); a first positioning groove for clamping the tube member is provided on the active die (31); a second positioning groove for clamping the tube member is provided on the passive die (32); the active die (31) slides below the loading trough (23); when the active die (31) approaches and abuts against the passive die (32), the tube member is clamped in the first positioning groove and the second positioning groove and is bent into a corresponding shape; The limiting mechanism (4) comprises a limiting rod (41) slidably arranged on the workbench (1), and a second power member (42) for driving the limiting rod (41) to approach or move away from the active mold (31); a clearance groove for the limiting rod (41) to slide is provided on the passive mold (32); and a limiting groove for clamping the pipe fitting is provided on a side of the limiting rod (41) facing the active mold (31); when the active mold (31) slides in a direction away from the passive mold (32) and is offset from the position of the lower opening of the feeding chute (23) in horizontal projection, the pipe fitting can fall to one side of the first positioning groove, and the limiting rod (41) can slide in the direction of the active mold (31) to drive the pipe fitting to clamp into the first positioning groove.

2. The automatic pipe bending machine according to claim 1, characterized in that: The bracket (21) is provided with a first loading plate (211) and a second loading plate (212) which are parallel to each other on the side wall facing the loading chamber (22); the loading trough (23) is formed between the first loading plate (211) and the second loading plate (212); the upper surface of the first loading plate (211) is connected with a guide plate (213); the guide plate (213) is arranged to be inclined upward in a direction away from the second loading plate (212); when the pipe fitting is placed on the guide plate (213), it can slide along the guide plate (213) and fall into the loading trough (23); and a sliding space for the active mold (31) to slide is formed between the bottom of the first loading plate (211) and the second loading plate (212) and the bracket (21).

3. The automatic pipe bending machine according to claim 2, characterized in that: A positioning seat (24) is arranged on a side of the bracket (21) facing away from the loading chamber (22); a positioning bolt (241) is arranged on the positioning seat (24); and a waist-shaped hole (242) for the positioning bolt (241) to pass through is opened on the positioning seat (24); the waist-shaped hole (242) extends toward the loading chamber (22); the positioning bolt (241) can pass through the waist-shaped hole (242) and be threadedly connected to the workbench (1).

4. The automatic pipe bending machine according to claim 2, characterized in that: The second power member (42) is a second cylinder. A connecting seat (43) is provided on the telescopic shaft of the second cylinder. A connecting rod (44) is provided on the end of the limit rod (41) away from the active mold (31). A connecting groove for the connecting rod (44) to be slidably inserted is provided on the connecting seat (43). An anti-slip block (45) is provided on the side wall of the connecting rod (44). An anti-slip groove for the anti-slip block (45) to slide is provided in the connecting seat (43). A first spring (46) is provided between the limit rod (41) and the connecting seat (43). When the anti-slip block (45) abuts against the side wall of the anti-slip groove close to the active mold (31), the first spring (46) is in a compressed state.

5. The automatic pipe bending machine according to claim 4, characterized in that: The limiting mechanism (4) further comprises a limiting block (47), a linkage shaft (48) and a tension spring (49) arranged on the bracket (21); a first shaft (214) is arranged on a side of the bracket (21) facing the driven mold (32); a second shaft (215) is arranged on a side of the bracket (21) facing away from the feeding cavity (22); the limiting block (47) is rotatably arranged on the first shaft (214); the linkage shaft (48) is arranged on the limiting block (47); one end of the tension spring (49) is connected to the first shaft (214) and the linkage shaft (48) is connected to the first shaft (215). The two shafts (215) are connected, and the other end of the tension spring (49) is connected to the linkage shaft (48); the limit block (47) has a first abutting surface (471) and a second abutting surface (472); when the tension spring (49) drives the limit block (47) to rotate toward the bracket (21), the first abutting surface (471) can abut against the side wall of the second loading plate (212), and the second abutting surface (472) can abut against the side wall of the pipe falling into the sliding space, and the tension spring (49) is in a stretched state.

6. An automatic pipe bending machine according to any one of claims 1 to 5, characterized in that: The machine also comprises a material unloading mechanism (5), the material unloading mechanism (5) comprising a material collecting frame (51), a conveyor belt (52) and a linkage assembly (53), the conveyor belt (52) comprising an active roller (522) and a driven roller (523) rotatably arranged on the workbench (1), a conveyor belt body (521) wound around the outside of the active roller (522) and the driven roller (523), and a plurality of material receiving plates (524) arranged at intervals on the conveyor belt body (521), the active die (31) can drive the active roller (522) to rotate intermittently through the linkage assembly (53); a material unloading port (11) is provided on the workbench (1), and when the pipe fitting is bent, it can pass through the material unloading port (11) and fall onto the material receiving plate (524) of the conveyor belt (52), and can fall into the material unloading frame (51) as the material receiving plate (524) moves.

7. The automatic pipe bending machine according to claim 6, characterized in that: The linkage assembly (53) comprises a rotating block (531) rotatably arranged on the workbench (1), the rotating block (531) being polygonal, the rotating block (531) being coaxially connected to the active roller (522), and the workbench (1) being provided with a rotating groove (12) for the rotating block (531) to rotate; the linkage assembly (53) further comprises a driving rod (532) slidably arranged on the workbench (1), and a linkage rod (533) connected between the driving rod (532) and the active mold (31), the workbench (1) being provided with a sliding groove (132) for the driving rod (532) to slide ), the extending direction of the sliding groove (13) is parallel to the sliding direction of the active mold (31), the sliding groove (13) is connected to the rotating groove (12), and the linkage assembly (53) further comprises a spring-loaded member (534) for driving the rotating block (531) to slide in the direction of the sliding groove (13); when the active mold (31) is located at an end away from the driven mold (32), the spring-loaded member (534) drives the corner of the rotating block (531) to rotate into the sliding groove (13), and when the active mold (31) slides in the direction of the driven mold (32), it can drive the rotating block (531) to rotate.

8. The automatic pipe bending machine according to claim 7, characterized in that: The spring-pressing member (534) comprises a spring-pressing column (5341) and a second spring (5342); a mounting groove for the spring-pressing column (5341) to slide is provided on the workbench (1); the second spring (5342) is arranged between the bottom wall of the mounting groove and the spring-pressing column (5341); an arc-shaped column head is provided at one end of the spring-pressing column (5341) away from the second spring (5342); an arc-shaped groove (5311) for the arc-shaped column head to be inserted into is provided on the rotating block (531); when a side wall of the rotating block (531) facing the sliding groove (13) is parallel to the sliding groove (13), the arc-shaped column head is located on a side of the arc-shaped groove (5311) close to the sliding groove (13) and can be inserted into the arc-shaped groove (5311) under the elastic force of the second spring (5342).

9. The automatic pipe bending machine according to claim 8, characterized in that: The driving rod (532) is rotatably connected to a rotating wheel (5321) at a corner of the sliding slot (13).

10. The automatic pipe bending machine according to claim 6, characterized in that: A buffer plate (511) is provided in the material collecting frame (51) for sliding up and down movement, and a plurality of third springs (512) are provided at intervals between the buffer plate (511) and the bottom of the material collecting frame (51).

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