Hollow steel pipe press forming machine

Abstract

The application discloses a hollow steel pipe pressing and shaping machine and relates to the technical field of pressing and shaping machines.The hollow steel pipe pressing and shaping machine comprises a main box, both ends of the top of the main box are provided with side plates, the side close to each other of the two side plates is provided with a guide strip and a vertical strip, and a feeding channel is formed between the corresponding guide strip and vertical strip; the side away from the corresponding side plate of the vertical strip is provided with a feeding assembly; the feeding assembly comprises a fixed plate, a movable plate and a side plate; the fixed plate is fixed to the top of the main box; the movable plate is slid on the top of the main box; and the side plate is fixed to the side of the movable plate. The hollow steel pipe pressing and shaping machine is based on the structural design of the side plate, and through the cooperation of the fixed plate and the movable plate, the functions of automatic feeding, conveying, clamping and fixing, centering and discharging are realized; the hollow steel pipe pressing and shaping machine has the advantages of simple structure, high automation degree, stable and reliable operation, improved production efficiency and product consistency of hollow steel pipe pressing and shaping machining, reduced labor cost and safety risk and ensured use efficiency of the hollow steel pipe pressing and shaping machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressing forming machine, and particularly relates to a hollow steel pipe pressing forming machine. BACKGROUND

[0002] The hollow steel pipe is widely applied to multiple processing industries such as furniture, umbrella and outdoor products due to the characteristics of light weight and high strength, and the pressing forming machine is often used to complete the stamping forming processing of specific shapes in the processing process.

[0003] In the current hollow steel pipe pressing forming processing technology, most production scenes still rely on manual operation to complete the core processes such as root-by-root feeding and auxiliary fixing. Limited by the operation rhythm of manual operation, it is difficult to adapt to the large-batch continuous production demand. At the same time, the consistency of manual operation is insufficient, which leads to large fluctuation of parameters such as product taper and size, and affects the efficiency of pressing forming.

[0004] Therefore, it is necessary to provide a hollow steel pipe pressing forming machine to solve the above problems. SUMMARY

[0005] The present application aims to provide a hollow steel pipe pressing forming machine to solve the problem that in the current hollow steel pipe pressing forming processing technology, most production scenes still rely on manual operation to complete the core processes such as root-by-root feeding and auxiliary fixing, limited by the operation rhythm of manual operation, it is difficult to adapt to the large-batch continuous production demand, at the same time, the consistency of manual operation is insufficient, which leads to large fluctuation of parameters such as product taper and size, and affects the efficiency of pressing forming.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a hollow steel pipe pressing forming machine, comprising a main box, two ends of the top of the main box are provided with side plates, the side of the two side plates close to each other is provided with a guide strip and a vertical strip, and the guide strip and the vertical strip correspondingly form a feeding channel therebetween;

[0007] The side of the vertical strip away from the corresponding side plate is provided with a feeding assembly, the feeding assembly comprises a fixed plate, a movable plate and a side plate, the fixed plate is fixed on the top of the main box, the movable plate slides on the top of the main box, and the side plate is fixed on the side of the movable plate;

[0008] The side of the fixed plate close to the movable plate is provided with a fixed groove, and the side of the movable plate close to the fixed plate is provided with a movable groove, the side plate is provided with a side recess, a supporting portion and an inner inclined portion, the supporting portion is located between the side recess and the inner inclined portion, and the side recess is matched with the movable groove;

[0009] The two ends of the bottom of the vertical strip are rotatably provided with a first swing strip and a second swing strip, the first swing strip is close to the guide strip, and the vertical strip is fixed with a limiting block abutting against the second swing strip;

[0010] The two sides of the top of the main box are respectively provided with a tail rotating part and a stamping part.

[0011] Preferably, the bottom of the vertical bar is fixedly connected with a first fixed rod, the first swing bar is rotationally arranged on the first fixed rod, a torsion spring is sleeved on the first fixed rod, one end of the torsion spring is fixedly connected with the first fixed rod, and the other end of the torsion spring is fixedly connected with the first swing bar.

[0012] Preferably, the bottom of the vertical bar is fixedly connected with a second fixed rod, the second swing bar is rotationally arranged on the second fixed rod, and the bottom of the second swing bar is provided with a guide portion.

[0013] Preferably, the fixed table is fixed on the top of the main box, the movable table is fixed on the movable plate, the movable plate is slidingly arranged on the top of the main box, the connecting rod is hingedly connected to the movable table, the rotating plate is hingedly connected to the end of the connecting rod away from the movable table, the transmission rod is rotationally arranged on the side of the main box, the rotating plate is arranged on the transmission rod, and the driving member for driving the transmission rod to rotate is installed on the main box.

[0014] Preferably, the auxiliary frame is installed on the side of the main box, the moving seat is slidingly arranged on the auxiliary frame, the stamping member comprises a mold core rod and a mold head, the mold core rod is fixedly installed on the moving seat, the mold head is threadedly connected to the end of the mold core rod away from the moving seat, and the stable seat for allowing the mold core rod to slide through is installed on the top of the main box.

[0015] Preferably, the conveying channel is arranged on the mold core rod in the axial direction, the accelerating channel is arranged on the mold head in the axial direction, the conveying channel is in communication with the accelerating channel, and the inner diameter of the accelerating channel is smaller than that of the conveying channel.

[0016] Preferably, the spiral strip is fixedly installed in the accelerating channel.

[0017] Preferably, the transmission wheels are rotationally arranged at the two ends of the auxiliary frame, the two transmission wheels are drivingly connected through a transmission belt, the second motor is fixedly installed on the auxiliary frame, one of the transmission wheels is fixedly connected to the driving shaft of the second motor, and the moving seat is fixedly connected to the transmission belt.

[0018] Preferably, the electromagnet is fixedly installed in the movable groove.

[0019] Preferably, the outer inclined portion is arranged at the top of the side plate near the end of the fixed plate, the outer inclined portion is close to the inner inclined portion, the inner inclined portion and the outer inclined portion are arranged in an inverted V shape, the slide plate is fixed to the side of the fixed plate, the top end of the slide plate is arranged in an inclined manner, and the end of the slide plate away from the fixed plate is inclined downward.

[0020] The technical effects and advantages of the present application are as follows:

[0021] 1. The application is based on the structural design of the side plate, and through the cooperation of the fixed plate and the movable plate, the functions of automatic feeding, conveying, clamping and fixing, centering and discharging are realized, the structure is simple, the degree of automation is high, the operation is stable and reliable, the production efficiency and product consistency of hollow steel pipe pressing and shaping machining are improved, the labor cost and safety risk are reduced, and the use efficiency of the hollow steel pipe pressing and shaping machine is ensured;

[0022] 2. The application is based on the cooperative cooperation of the guide bar, the vertical bar, the first swing bar and the second swing bar, and can accurately realize the gap and single discharging, ensure that each hollow steel pipe body enters the machining station in order and stably, avoid the problems of jamming and wrong material caused by simultaneous discharging of multiple pipes, and further improve the coherence and accuracy of the whole machining process;

[0023] 3. The side plate is arranged, which can cooperate with the feeding channel to ensure the stability of concentrated feeding, and ensure the stability of the hollow steel pipe body and the first swing bar and the second swing bar during contact, and realize efficient conveying;

[0024] 4. By setting the electromagnet, the axial movement in the subsequent conveying and clamping process is prevented, the processing efficiency is ensured; at the same time, cooperating with the arc structure characteristics inside the movable groove and the movable design of the movable plate, automatic cleaning can be realized;

[0025] 5. Through the rigid clamping and fixing of the movable plate and the fixed plate, cooperating with the stable seat for guiding and limiting the mold core rod, the mold head can be accurately inserted into the lumen of the hollow steel pipe body and adhere to the inner wall, providing a stable inner reference for forming; the screw feed realizes uniform feeding, avoiding the problems of taper deviation and uneven wall thickness caused by manual operation;

[0026] 6. The mold head and the mold core rod are connected by threads, which can quickly replace mold heads of different tapers and sizes, and adapt to the pointed tail forming needs of hollow steel pipe bodies of various specifications;

[0027] 7. When the mold core rod and the mold head are accurately inserted into the lumen of the hollow steel pipe body, the hollow steel pipe body will be slightly extruded and calibrated, so that the roundness of the inner hole of the hollow steel pipe body is restored to the qualified range, without the need for additional shaping process;

[0028] 8. After the mold core rod and the mold head are inserted into the lumen of the hollow steel pipe body, a limiting force is formed, cooperating with the clamping and fixing of the movable plate and the fixed plate, the double limitation can reduce the risk of movement during forming, and further ensure the forming precision;

[0029] 9. By setting the conveying channel and the acceleration channel and other structures, no additional cleaning device is needed, the cavity cleaning is synchronizedly completed by the preparatory action before the die insertion, the surface defects (such as pits and scratches) caused by the impurities being extruded and embedded into the inner wall of the hollow steel pipe body during the molding process are avoided, the granular impurities are prevented from abrading the conical surface of the die, the service life of the die is indirectly prolonged, and meanwhile, the rotating airflow can more comprehensively cover the inner wall of the cavity, and the cleaning is more thorough compared with the direct blowing type airflow cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application.

[0031] Figure 2 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application. Figure 1

[0032] Figure 3 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application. Figure 1

[0033] Figure 4 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application. Figure 1

[0034] Figure 5 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application.

[0035] Figure 6 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application.

[0036] Figure 7 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application. Figure 6

[0037] Figure 8 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application. Figure 6

[0038] Figure 9 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application.

[0039] Figure 10 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application. Figure 9

[0040] Figure 11 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application.

[0041] Figure 12 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application.

[0042] Figure 13 It is a structure schematic view of the hollow steel pipe pressing and molding machine of the application.

[0043] Figure 14 ​​​​​​This is a schematic diagram of the conveying channel and acceleration channel structure of the present invention.

[0044] In the diagram: 1. Main box; 101. Subframe; 2. Side plate; 3. Guide bar; 4. Vertical bar; 5. Feeding channel; 6. Fixed platform; 7. Fixed plate; 701. Fixed groove; 8. Moving platform; 9. Moving plate; 901. Moving groove; 902. Electromagnet; 10. Side plate; 1001. Side recess; 1002. Support part; 1003. Inward inclined part; 1004. Outward inclined part; 11. First fixed rod; 12. First swing bar; 13. Torsion spring; 14. Second fixed rod; 15. Second 1501. Swing bar; 16. Guide section; 17. Limiting block; 18. Transmission rod; 19. Driving component; 20. Rotating plate; 21. Connecting rod; 22. Tail spinning device; 23. Lead screw; 24. First motor; 25. Stabilizing seat; 26. Mold core rod; 2501. Conveying channel; 27. Mold head; 2601. Acceleration channel; 2602. Spiral strip; 28. Moving seat; 29. ​​Hollow steel pipe body; 30. Transmission wheel; 31. Second motor; 32. Transmission belt; 33. Slide plate. Detailed Implementation

[0045] This invention provides, for example Figures 1-14 The hollow steel pipe pressing and forming machine shown includes a main box 1, and an auxiliary frame 101 is fixedly installed on the side of the main box 1. A tailing component is provided at the end of the main box 1 away from the auxiliary frame 101, and a stamping component is provided at the auxiliary frame 101.

[0046] Side plates 2 are installed at both ends of the top of the main box 1. The side plates 2 are inverted L-shaped with a wider top. Guide strips 3 and vertical strips 4 are installed on the side of the two side plates 2 that are close to each other. The vertical strips 4 are L-shaped with a wider bottom and a gap between the bottom of the vertical strips 4 and the top of the main box 1. The guide strips 3 are "U"-shaped, and the bottom of the guide strips 3 abuts against the top of the main box 1. The guide strips 3 and vertical strips 4 on the same side plate 2 form a feeding channel 5, which is wider at the top and narrower at the bottom (see reference). Figure 9 , Figure 10 The upper half of the feeding channel 5 can accommodate a large number of hollow steel pipe bodies 28 at the same time. Before pressing and shaping, the operator feeds the material into the feeding channel 5. The two ends of the hollow steel pipe body 28 abut against the two side plates 2 respectively. The width of the lower half of the feeding channel 5 is adapted to the outer diameter of the hollow steel pipe body 28, and multiple hollow steel pipe bodies 28 are arranged vertically here.

[0047] The upper feeding assembly is arranged on the side of the upright strip 4 away from the corresponding side plate 2, and comprises a fixed plate 7, a movable plate 9 and a side plate 10. The fixed plate 7, the movable plate 9 and the side plate 10 are distributed along the width direction of the main box 1. The fixed plate 7 is fixed with a fixed table 6, and the fixed table 6 and the fixed plate 7 are fixed on the top of the main box 1. The movable plate 9 is fixed with a movable table 8, and the movable table 8 and the movable plate 9 are slidingly arranged on the top of the main box 1. The fixed plate 7 and the movable plate 9 are oppositely distributed, that is, the movable table 8 and the movable plate 9 can move towards or away from the fixed plate 7, so as to realize the approach and separation of the fixed plate 7 and the movable plate 9.

[0048] The side plate 10 is fixed on the side of the movable plate 9, and is located on the side of the movable plate 9 close to the corresponding upright strip 4. Meanwhile, the side plate 10 is also attached to the side of the fixed table 6 and the fixed plate 7, so as to ensure the stability of the overall structure of the fixed plate 7, the movable plate 9 and the like.

[0049] Among them, the hollow steel pipe body 28 located at the bottom end inside the feeding channel 5 will fall on the two side plates 10 at both ends and be located at the corresponding positions of the side plates 10 and the movable table 8.

[0050] When the movable table 8 and the movable plate 9 move towards the fixed plate 7, that is, from the direction of the guide strip 3 towards the upright strip 4. When the movable table 8 and the movable plate 9 move away from the fixed plate 7, that is, from the direction of the upright strip 4 towards the guide strip 3.

[0051] The side of the fixed plate 7 and the movable plate 9 close to each other is respectively provided with a fixed groove 701 and a movable groove 901. When the movable plate 9 and the fixed plate 7 are attached and close to each other, the fixed groove 701 and the movable groove 901 cooperate to form a circular groove, which is matched with the shape of the hollow steel pipe body 28.

[0052] In actual use, rubber pads or the like are installed in the fixed groove 701 and the movable groove 901, so as to avoid abrasion of the hollow steel pipe body 28.

[0053] The top of the side plate 10 has a side recess 1001, a support portion 1002, an inner inclined portion 1003 and an outer inclined portion 1004, which are sequentially distributed away from the movable table 8. The side recess 1001 is correspondingly distributed with the movable groove 901 and has the same shape. The support portion 1002 is horizontally arranged. The inner inclined portion 1003 and the outer inclined portion 1004 are arranged in an inverted V shape. The inner inclined portion 1003 is inclined upward away from the support portion 1002, and the outer inclined portion 1004 is inclined downward away from the inner inclined portion 1003.

[0054] The bottom of the vertical strip 4 is provided with a first swing strip 12 and a second swing strip 15 at both ends respectively, and the first swing strip 12 and the second swing strip 15 are located on the side of the vertical strip 4 facing the feeding assembly, wherein the first swing strip 12 is close to the guide strip 3, the bottom of the vertical strip 4 is fixedly connected with a second fixed rod 14, the second swing strip 15 is rotationally arranged on the second fixed rod 14, and the vertical strip 4 is fixedly connected with a limiting block 16 abutting against the second swing strip 15, and the first swing strip 12 is in a vertical state (see Figure 10 , under the limiting action of the limiting block 16, the second swing strip 15 can only swing clockwise with the vertical state as the starting position, and cannot swing counterclockwise with the vertical state as the starting position, and after swinging clockwise with the vertical state as the starting position, it will naturally reset to the vertical state under the action of its own gravity.

[0055] Meanwhile, the bottom of the second swing strip 15 is provided with a guide portion 1501, the guide portion 1501 is inclined, and the guide portion 1501 is located on the side of the second swing strip 15 close to the first swing strip 12; in addition, the bottom of the first swing strip 12 is provided with a round corner.

[0056] The bottom of the vertical strip 4 is fixedly connected with a first fixed rod 11, the first swing strip 12 is rotationally arranged on the first fixed rod 11, a torsional spring 13 is sleeved on the first fixed rod 11, one end of the torsional spring 13 is fixedly connected to the first fixed rod 11, and the other end of the torsional spring 13 is fixedly connected to the first swing strip 12. When not affected by external force, under the elastic supporting force of the torsional spring 13, the first swing strip 12 is in a vertical state (see Figure 10 ), ensuring that the bottom end of the feeding channel 5 is in a closed state, and the hollow steel pipe body 28 will not slide out, and the torsional spring 13 can also assist the first swing strip 12 to reset to the vertical state.

[0057] In actual use, the movable table 8, the movable plate 9 and the side plate 10 are controlled to move away from the fixed plate 7, so that the supporting portion 1002 moves to correspond to the feeding channel 5, and at this time, one hollow steel pipe body 28 located at the bottom end inside the feeding channel 5 will fall on the supporting portion 1002.

[0058] Then, the movable table 8 and the movable plate 9 are controlled to move towards the fixed plate 7, the hollow steel pipe body 28 first contacts the first swing strip 12, and under the limiting action of the first swing strip 12, the hollow steel pipe body 28 first enters the movable groove 901, and as the movable table 8 and the movable plate 9 continue to move, the hollow steel pipe body 28 will push the bottom end of the first swing strip 12 to swing towards the second swing strip 15, so that the hollow steel pipe body 28 is staggered with the first swing strip 12, and after the hollow steel pipe body 28 is staggered with the first swing strip 12, under the resetting elastic force of the torsional spring 13, the first swing strip 12 resets to the vertical state.

[0059] Then, the moving table 8, the moving plate 9 and the side plate 10 continue to move, the hollow steel pipe body 28 contacts the guide part 1501 of the second swing bar 15, the hollow steel pipe body 28 pushes the bottom end of the second swing bar 15 to swing away from the first swing bar 12, so that the hollow steel pipe body 28 is staggered with the second swing bar 15, after the hollow steel pipe body 28 is staggered with the second swing bar 15, under the action of its own gravity, the first swing bar 12 will naturally reset to the vertical state, the moving table 8, the moving plate 9 continue to drive the hollow steel pipe body 28, so as to realize the functions of automatic feeding and conveying.

[0060] In the above process, the two ends of the hollow steel pipe body 28 are always attached to the two side plates 2 respectively, to ensure the stability during contact with the first swing bar 12 and the second swing bar 15.

[0061] At the same time, the first swing bar 12, the second swing bar 15 and other positions are provided with rubber pads and other structures to avoid causing wear of the hollow steel pipe body 28.

[0062] In the above process, another hollow steel pipe body 28 originally located above the hollow steel pipe body 28 is still located inside the feeding channel 5 by the limiting of the upright bar 4, and becomes the bottommost hollow steel pipe body 28 inside the feeding channel 5, the two ends of which fall on the two side plates 10 and are located at the corresponding positions of the side plates 10 and the moving table 8, waiting for the next round of operation.

[0063] The moving table 8, the moving plate 9 and the side plate 10 continue to move, when the moving plate 9 is attached to the fixed plate 7 and approaches, the fixed groove 701 and the moving groove 901 cooperate to form a circular groove to clamp and fix the hollow steel pipe body 28, so as to realize the function of clamping and fixing, and the clamping and positioning part corresponds to the rotary tail part to realize the function of automatic centering.

[0064] Next, the rotary tail part cooperates with the stamping part to perform stamping operation on the hollow steel pipe body 28.

[0065] After the pressing and shaping is completed, the moving table 8, the moving plate 9 and the side plate 10 are controlled to move away from the fixed plate 7, the hollow steel pipe body 28 is still located at the side recess part 1001 and the supporting part 1002, when the hollow steel pipe body 28 contacts the second swing bar 15, the bottom end of the second swing bar 15 cannot swing towards the first swing bar 12 due to the limiting action of the limiting block 16, with the moving table 8, the moving plate 9 and the side plate 10 continuing to move away from the fixed plate 7, under the limiting of the second swing bar 15 and the guidance of the inner inclined part 1003, the hollow steel pipe body 28 will lift along the inner inclined part 1003, finally enter the outer inclined part 1004, and automatically slide down along the outer inclined part 1004, to realize the function of automatic unloading.

[0066] Repeat the above steps to quickly complete the pressing and shaping operation of all hollow steel pipe bodies 28.

[0067] In summary, the present application is based on the structural design of the side plate 10, and through the cooperation of the fixed plate 7 and the moving plate 9, the functions of automatic feeding, conveying, clamping and fixing, centering, and discharging are realized, the structure is simple, the degree of automation is high, the operation is stable and reliable, the production efficiency and product consistency of the hollow steel pipe pressing and shaping machine are improved, the labor cost and safety risk are reduced, and the use efficiency of the hollow steel pipe pressing and shaping machine is ensured.

[0068] At the same time, based on the cooperative matching of the guide bar 3, the vertical bar 4, the first swing bar 12 and the second swing bar 15, the gap type and single type discharging can be accurately realized, ensuring that each hollow steel pipe body 28 enters the processing station in order and stably, avoiding the problems of jamming and misplacement caused by simultaneous discharging of multiple pipes, and further improving the continuity and accuracy of the entire processing flow.

[0069] Further, the side plate 2 is provided, which can cooperate with the feeding channel 5 to ensure the stability of concentrated feeding, and at the same time ensure the stability of the hollow steel pipe body 28 during contact with the first swing bar 12 and the second swing bar 15, realizing efficient conveying.

[0070] Considering that the hollow steel pipe body 28 is offset from the second swing bar 15, and before the moving plate 9 and the fixed plate 7 are close to each other, the two ends lack the limiting of the two side plates 2, and axial movement is easy to occur, in order to improve the stability of the hollow steel pipe body 28 conveying, a mounting groove is arranged in the inside of the moving groove 901, and an electromagnet 902 is fixedly installed in the mounting groove; when the hollow steel pipe body 28 enters the moving groove 901, it will be attracted and fixed by the electromagnet 902, preventing axial movement during subsequent conveying and clamping.

[0071] In actual use, if iron filings are adsorbed in the moving groove 901 due to the attraction of the electromagnet 902, the electromagnet 902 can be controlled to be closed, and under the influence of the arc-shaped structure in the inside of the moving groove 901 and the back-and-forth small-amplitude rapid movement of the moving plate 9, the iron impurities in the moving groove 901 can be automatically dropped, realizing automatic cleaning and avoiding affecting the subsequent feeding and conveying of the hollow steel pipe body 28.

[0072] And the operator can regularly clean the dropped iron filings.

[0073] In summary, by arranging the electromagnet 902, axial movement during subsequent conveying and clamping is prevented, ensuring processing efficiency; and cooperating with the arc-shaped structure in the inside of the moving groove 901 and the movable design of the moving plate 9, automatic cleaning can be realized.

[0074] Further, in actual use, the side plates 2, fixed plates 7, movable plates 9 and side plates 10 on the side away from the rotating tail part can be formed as a whole, which can slide along the length direction of the main box 1 and be locked, so that the distance between the two side plates 2 can be adjusted, and hollow steel pipe bodies 28 of different lengths can be placed, thereby increasing the flexibility of the hollow steel pipe pressing and forming machine in use and adjusting according to the use condition.

[0075] In order to directly discharge the hollow steel pipe body 28 after pressing and forming to the outside of the main box 1, the side of the fixed plate 7 is fixed with a sliding plate 32, the top end of the sliding plate 32 is inclinedly arranged, and the end away from the fixed plate 7 is inclined downward, and the end away from the fixed plate 7 of the sliding plate 32 extends outward from the top of the main box 1.

[0076] Specifically, the hollow steel pipe body 28 enters the outer inclined part 1004, automatically slides down on the sliding plate 32 along the outer inclined part 1004, and continues to slide along the top of the sliding plate 32, thereby realizing automatic discharge and avoiding affecting the structure on the main box 1; and a collection container can be placed on the side of the main box 1 to collect the hollow steel pipe body 28.

[0077] In order to realize the reciprocating movement of the movable table 8, movable plate 9, side plate 10 and the like, a connecting rod 20 is hinged on the movable table 8, the end away from the movable table 8 of the connecting rod 20 is hinged with a rotating plate 19, a transmission rod 17 is rotationally arranged on the side of the main box 1, the rotating plate 19 is arranged on the transmission rod 17, and a driving part 18 for driving the transmission rod 17 to rotate is installed on the main box 1. The driving part 18 is composed of a servo motor, a chain wheel and a chain, when the servo motor operates, the transmission rod 17 is driven to rotate through the chain wheel and the chain, and then the rotating plate 19 is synchronously driven to rotate. At the same time, the servo motor supports forward rotation and reverse rotation switching, when the rotating plate 19 rotates, the pushing and pulling force is converted through the connecting rod 20, and finally the movable table 8, movable plate 9, side plate 10 and the like are accurately and stably driven to move along the preset track, thereby providing stable power support for automatic feeding, centering and discharging processes.

[0078] Further, the outer wall surface of the transmission rod 17 can be arranged as a regular hexagon, a regular hexagonal groove of the transmission rod 17 is arranged on the rotating plate 19, and a locking bolt and the like locking structure are arranged, the transmission rod 17 can drive the rotating plate 19 to rotate, and at the same time, the rotating plate 19 can slide on the transmission rod 17 and be locked, without affecting the movement of the side plates 2, fixed plates 7, movable plates 9 and side plates 10 on the side away from the rotating tail part, thereby being capable of processing hollow steel pipe bodies 28 of different lengths.

[0079] Specifically, the rotating tail device includes a rotating tail device 21, a lead screw 22, and a first motor 23. The rotating tail device 21 is slidingly arranged on the main box 1, and the main box 1 is provided with a guide rail matched with the rotating tail device 21. The lead screw 22 is rotationally arranged on the main box 1. The rotating tail device 21 is provided with a threaded hole matched with the lead screw 22. The first motor 23 is fixedly installed on the main box 1, and the lead screw 22 is fixed on the driving shaft of the first motor 23.

[0080] The rotating tail device 21 includes a bead disc assembly, a special driving member (such as a micro servo motor or a pneumatic motor), and the like. The rotating tail device 21 and its working principle are common existing technologies, and thus will not be described herein.

[0081] After the first motor 23 is started, the lead screw 22 is uniformly rotated at a constant speed. The rotating motion is converted into linear motion through threaded transmission, and the rotating tail device 21 is slowly fed towards the hollow steel pipe body 28.

[0082] The moving seat 27 is slidingly arranged on the auxiliary frame 101. The stamping member includes a die core rod 25 and a die head 26. The die core rod 25 is fixedly installed on the moving seat 27. The die head 26 is threadedly connected to the end of the die core rod 25 away from the moving seat 27. The die head 26 is conical in shape and can be replaced. The top of the main box 1 is provided with a stable seat 24 for the die core rod 25 to slide through, so as to ensure the stability of the movement of the die core rod 25. The stable seat 24 is provided with a ball bearing or the like to reduce the wear between the die core rod 25 and the stable seat 24.

[0083] Specifically, after the moving plate 9 is close to the fixed plate 7 and clamps and fixes the hollow steel pipe body 28, the stamping member and the rotating tail device are started synchronously to form an “internal support + external extrusion” forming mechanism.

[0084] The die head 26 is precisely inserted into the lumen of the hollow steel pipe body 28 until the die head 26 corresponds to the to-be-formed section of the hollow steel pipe body 28. At this time, the die head 26 serves as an internal support structure to provide a radial shaping reference for the hollow steel pipe body 28.

[0085] At the same time, the rotating tail device 21 slowly feeds towards the hollow steel pipe body 28. The bead disc assembly of the rotating tail device 21 rotates at a high speed under the driving of the special driving member. The rollers of the bead disc assembly are in close contact with the outer periphery of the to-be-formed section and apply uniform radial pressure. The heat generated by the rotating friction causes the material at the to-be-formed section to gradually soften. As the rotating tail device 21 continues to feed, the inside of the pipe is blocked by the conical structure of the die head 26, thereby forming a sharp tail shape matching the taper of the die head 26.

[0086] After reaching the preset forming size, the rotating tail device 21 is withdrawn to the initial position under the reverse driving of the first motor 23. At the same time, the moving seat 27 drives the die core rod 25 and the die head 26 to be withdrawn from the inside of the pipe, thereby completing a pressing forming operation.

[0087] In summary, through the rigid clamping and fixing of the movable plate 9 and the fixed plate 7, and the guidance and limiting of the stable seat 24 to the mold core rod 25, the die head 26 can be accurately inserted into the lumen of the hollow steel pipe body 28 and attached to the inner wall, providing a stable inner reference for forming; the spin tail device 21 is driven by the lead screw 22 to achieve uniform feeding, avoiding the problems of taper deviation and uneven wall thickness caused by manual operation.

[0088] The die head 26 and the mold core rod 25 are connected by threads, which can quickly replace different taper and size die heads 26, and adapt to the pointed tail forming needs of various specifications of hollow steel pipe bodies 28.

[0089] For the problem of slight deformation and ovality of the hollow steel pipe body 28 caused by transportation and storage before processing, when the mold core rod 25 and the die head 26 are accurately inserted into the lumen of the hollow steel pipe body 28, the hollow steel pipe body 28 will be slightly extruded and calibrated, so that the roundness of the inner hole of the hollow steel pipe body 28 is restored to the qualified range, without the need for additional shaping process.

[0090] After the mold core rod 25 and the die head 26 are inserted into the lumen of the hollow steel pipe body 28, a limiting force is formed, and the clamping and fixing of the movable plate 9 and the fixed plate 7 are combined, which can reduce the risk of movement during forming and further ensure the forming precision.

[0091] Both ends of the auxiliary frame 101 are rotatably provided with transmission wheels 29, and the two transmission wheels 29 are drivingly connected by a transmission belt 31. The two transmission wheels 29 are arranged in parallel and at the same height to ensure that the transmission belt 31 remains horizontally tensioned during operation. The second motor 30 is fixedly installed on the auxiliary frame 101, and one of the transmission wheels 29 is fixedly connected to the drive shaft of the second motor 30. The moving seat 27 is fixedly connected to the transmission belt 31.

[0092] When it is necessary to insert the die head 26 into the hollow steel pipe body 28, the second motor 30 is rotated in the forward direction to drive the transmission wheel 29 connected thereto to rotate. Under the cooperation of the transmission belt 31, the transmission wheel 29 at the other end rotates synchronously. At this time, the moving seat 27 fixed to the transmission belt 31 moves stably towards the main box 1, thereby driving the mold core rod 25 and the die head 26 to advance synchronously until the die head 26 is accurately inserted into the inner cavity of the hollow steel pipe body 28. When the die head 26 needs to be removed after forming, the second motor 30 is reversed, the transmission wheel 29 and the transmission belt 31 move in the opposite direction, and the moving seat 27 is reset. The mold core rod 25 and the die head 26 are extracted synchronously.

[0093] The mold core rod 25 is provided with a conveying channel 2501 distributed along the axial direction thereof, and the mold head 26 is provided with an accelerating channel 2601 distributed along the axial direction, the conveying channel 2501 communicates with the accelerating channel 2601, the inner diameter of the accelerating channel 2601 is smaller than that of the conveying channel 2501, and the end of the mold core rod 25 away from the mold head 26 is connected with a gas conveying pipeline of the factory for conveying gas from the conveying channel 2501 and the accelerating channel 2601.

[0094] Due to the small inner diameter of the accelerating channel 2601, the coverage of the sprayed gas is small, in order to ensure the coverage, a spiral strip 2602 is fixedly installed in the accelerating channel 2601, and the mold head 26 adopts a production mode of “two-half split machining + welding forming”, and the spiral strip 2602 is fixed in the accelerating channel 2601.

[0095] Specifically, before the mold head 26 is inserted into the hollow steel pipe body 28, gas is conveyed to the accelerating channel 2601 through the conveying channel 2501; the gas flow is smoothly guided through the conveying channel 2501, and after entering the accelerating channel 2601, the flow rate suddenly increases due to the space contraction, and at the same time, under the action of the spiral strip 2602, a high-speed rotating gas flow is formed, further improving the kinetic energy and impact force of the gas flow, and ensuring the coverage.

[0096] The high-speed rotating gas flow is sprayed out of the end of the accelerating channel 2601 and directly hits the lumen inside the hollow steel pipe body 28, which can quickly blow away the metal debris, dust and other particulate impurities left over from the previous processing, and can also blow away the trace of oil stains or water vapor attached to the inner wall of the pipe.

[0097] In summary, by setting the conveying channel 2501 and the accelerating channel 2601 and other structures, it is not necessary to additionally set a cleaning device, and the lumen cleaning is synchronously completed by the preparatory action before the mold head 26 is inserted, which avoids the surface defects (such as pits and scratches) caused by the impurities being pressed and embedded in the inner wall of the hollow steel pipe body 28 during the forming process, and also prevents the particulate impurities from wearing the conical surface of the mold head 26, thereby indirectly prolonging the service life of the mold head 26; at the same time, the rotating gas flow can more comprehensively cover the inner wall of the lumen, and the cleaning is more thorough compared with the straight blowing type gas flow.

[0098] During the above cleaning process, the impurities can be intercepted and collected at the other end of the hollow steel pipe body 28 by taking the collecting cover by a mechanical arm, so as to avoid affecting the rotating tail piece.

[0099] The first motor 23 and the second motor 30 are connected with the power supply of the factory and are controlled by an automatic control system, and the automatic control system includes a main control unit, a sensor module, a driving module, a man-machine interaction interface and the like, thereby improving the product consistency and the equipment operation safety.

Claims

1. A machine for the press-shaping of hollow steel tubes, comprising a main tank (1), characterised in that: Both ends of the top of the main box (1) are provided with side plates (2), the side close to each other of the two side plates (2) are provided with guide strips (3) and vertical strips (4), and the corresponding guide strips (3) and vertical strips (4) form a feeding channel (5). The side away from the corresponding side plate (2) of the vertical strip (4) is provided with a feeding assembly, the feeding assembly comprises a fixed plate (7), a movable plate (9) and a side plate (10), the fixed plate (7) is fixed on the top of the main box (1), the movable plate (9) slides on the top of the main box (1), and the side plate (10) is fixed on the side of the movable plate (9). The side close to each other of the fixed plate (7) and the movable plate (9) is respectively provided with a fixed groove (701) and a movable groove (901), the side plate (10) is provided with a side recess (1001), a supporting portion (1002) and an inner inclined portion (1003), the supporting portion (1002) is located between the side recess (1001) and the inner inclined portion (1003), and the side recess (1001) is matched with the movable groove (901). Both ends of the bottom of the vertical strip (4) are rotatably provided with a first swing strip (12) and a second swing strip (15), wherein the first swing strip (12) is close to the guide strip (3), and the vertical strip (4) is fixedly provided with a limiting block (16) abutting against the second swing strip (15). Both sides of the top of the main box (1) are provided with a rotating tail part and a stamping part.

2. A machine for pressing and shaping a hollow steel tube according to claim 1, characterized in that: The bottom of the vertical strip (4) is fixedly connected with a first fixed rod (11), the first swing strip (12) is rotatably arranged on the first fixed rod (11), a torsional spring (13) is sleeved on the first fixed rod (11), one end of the torsional spring (13) is fixedly connected with the first fixed rod (11), and the other end of the torsional spring (13) is fixedly connected with the first swing strip (12).

3. A machine for pressing and shaping a hollow steel tube according to claim 1, characterized in that: The bottom of the vertical strip (4) is fixedly connected with a second fixed rod (14), the second swing strip (15) is rotatably arranged on the second fixed rod (14), and the bottom of the second swing strip (15) is provided with a guide portion (1501).

4. A machine for pressing and shaping a hollow steel tube according to claim 1, characterized in that: The fixed plate (7) is fixedly provided with a fixed table (6), the fixed table (6) is fixed on the top of the main box (1), the movable plate (9) is fixedly provided with a movable table (8), the movable plate (9) is slidably arranged on the top of the main box (1), a connecting rod (20) is hingedly connected to the movable table (8), one end, away from the movable table (8), of the connecting rod (20) is hingedly connected with a rotating plate (19), a transmission rod (17) is rotatably arranged on the side of the main box (1), the rotating plate (19) is arranged on the transmission rod (17), and the main box (1) is provided with a driving part (18) for driving the transmission rod (17) to rotate.

5. A hollow steel tube press forming machine according to claim 1, characterized in that: The side of the main box (1) is provided with a bracket (101), a moving seat (27) is slidably arranged on the bracket (101), the stamping part comprises a die core rod (25) and a die head (26), the die core rod (25) is fixedly arranged on the moving seat (27), the die head (26) is threadedly connected to one end, away from the moving seat (27), of the die core rod (25), and the top of the main box (1) is provided with a stable seat (24) for allowing the die core rod (25) to slide therethrough.

6. A machine for pressing and shaping a hollow steel tube according to claim 5, characterized in that: The mold core rod (25) is provided with conveying channels (2501) distributed along the axial direction, the die head (26) is provided with accelerating channels (2601) distributed along the axial direction, the conveying channels (2501) are communicated with the accelerating channels (2601), and the inner diameter of the accelerating channels (2601) is smaller than that of the conveying channels (2501).

7. A machine for pressing and shaping a hollow steel tube according to claim 6, characterized in that: The accelerating channels (2601) are fixedly provided with spiral strips (2602) inside.

8. A hollow steel tube press forming machine according to claim 5, characterized in that: Both ends of the auxiliary frame (101) are rotatably provided with transmission wheels (29), the two transmission wheels (29) are drivingly connected through a transmission belt (31), a second motor (30) is fixedly installed on the auxiliary frame (101), and one of the transmission wheels (29) is fixedly connected to the driving shaft of the second motor (30); the moving seat (27) is fixedly connected to the transmission belt (31).

9. A hollow steel tube press forming machine according to claim 1, characterized in that: The moving groove (901) is fixedly provided with an electromagnet (902) inside.

10. The machine according to claim 1, characterized in that: The top of one end of the side plate (10) close to the fixed plate (7) is provided with an outer inclined part (1004), the outer inclined part (1004) is close to the inner inclined part (1003), the inner inclined part (1003) and the outer inclined part (1004) are in inverted V-shaped distribution, the side of the fixed plate (7) is fixedly provided with a sliding plate (32), the top end of the sliding plate (32) is obliquely arranged, and the end, away from the fixed plate (7), is obliquely downward.

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