Punching device for steel pipe production

Abstract

The utility model discloses a punching device for steel pipe production. The punching device comprises a rack, a punching mechanism, a feeding mechanism, a centering clamping mechanism and a driving mechanism. The punching mechanism is fixedly arranged in the middle of the rack and located between the feeding mechanism and the centering clamping mechanism. The feeding mechanism is movably arranged on one side of the upper portion of the rack, the output end of the feeding mechanism is used for clamping the pipe fitting, and the feeding mechanism has the capacity of horizontally moving towards the punching mechanism so as to achieve feeding; the centering clamping mechanism is movably arranged on the other side of the upper portion of the rack, the output end of the centering clamping mechanism is used for clamping the pipe fitting and positioning the pipe fitting, and the centering clamping mechanism has the capacity of horizontally moving away from the punching mechanism; the driving mechanisms are respectively arranged on the upper side of the rack below the feeding mechanism and the centering clamping mechanism; the driving mechanism is movably connected with the corresponding feeding mechanism and the centering clamping mechanism so as to drive the feeding mechanism and the centering clamping mechanism to achieve respective horizontal movement. According to the utility model, the coaxiality precision between the pipe fitting and the punching mechanism is ensured, and die assembly damage caused by deviation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe punching, and more specifically to a punching device for steel pipe production. Background Art

[0002] In the prior art, the pipe punching process relies on the reciprocating motion of the feeding mechanism to transport the pipe into the punching mechanism for processing. For example, in the patent application number CN202010562696.2, the unprocessed pipe is integrally mounted on the outside of the mold core and is driven by the feeding mechanism into the punching mechanism to be processed into holes. When the pipe is being processed, the clamping unit of the feeding mechanism clamps the tail end of the pipe and transports the pipe from the side of the mold core fixing frame to the side of the punching mechanism. During the transportation process, before each feeding, the clamping unit of the punching mechanism needs to be opened to loosen the pipe so that the feeding mechanism can transport a section of the pipe to be processed forward. During the loosening feeding, only the clamping unit of the feeding mechanism constrains and fixes the pipe, and the constrained and fixed side is only at one end of the pipe, which has the defect of insufficient clamping and positioning accuracy. In real-world production, pipes can sag due to their own weight, causing them to deviate from the coaxiality of the punching clamp. Alternatively, when the punching clamp opens, the friction caused by the core punch separating from the wall of the processed hole causes the pipe to vibrate, leading to coaxial deviation. If this deviation is not corrected, the clamp will squeeze the misaligned pipe until it is coaxial during the next clamping cycle. During this squeezing process, the clamp can damage the pipe wall, causing indentations or deformation, which can compromise the overall strength of the pipe. Utility Model Content

[0003] The utility model provides a punching device for steel pipe production. By adding a positioning clamping device, the coaxiality of the processed pipe and the clamping unit is always maintained while the pipe is transported following the feeding mechanism, thereby avoiding indentations and damages to the pipe when the clamping unit is closed.

[0004] The utility model discloses a punching device for steel pipe production, which comprises a frame, a punching mechanism, a feeding mechanism, a centering and clamping mechanism and a driving mechanism.

[0005] The punching mechanism is fixedly arranged in the middle of the frame, between the feeding mechanism and the centering clamping mechanism.

[0006] The feeding mechanism is movably arranged on one side above the frame. The output end of the feeding mechanism is used to clamp the pipe fittings and has the ability to move horizontally toward the punching mechanism to realize feeding.

[0007] The centering clamping mechanism is movably arranged on the other side above the frame. The output end of the centering clamping mechanism is used to clamp and position the pipe fittings, and has the ability to move horizontally away from the punching mechanism.

[0008] The drive mechanism is respectively arranged below the feeding mechanism and the centering clamping mechanism. The drive mechanism is arranged on the upper side of the frame. The drive mechanism is movably connected to the corresponding feeding mechanism and the centering clamping mechanism to drive the two to achieve their respective horizontal movements.

[0009] As a further improvement of the present invention, two straight slide rails with equal heights are fixedly provided on both sides of the frame, and the frame table between the slide rails is concave to install the driving mechanism.

[0010] As a further improvement of the present invention, the centering clamping mechanism includes a centering die, a centering cylinder, and a centering mounting seat. The centering die is composed of two symmetrical single-piece molds, which are movably arranged in the middle of the upper side of the centering mounting seat. A pair of centering cylinders are fixedly arranged on both sides of the centering die. The cylinder body is fixedly connected to the centering mounting seat. The cylinder rods on both sides are respectively fixedly connected to the single-piece molds on one side of the centering die to drive the centering die to open and close. Linear sliders are provided on both sides of the lower base of the centering mounting seat, which are clamped to the linear slide rails fixed to the upper side of the frame to achieve horizontal sliding. A set of centering clips are movably provided on the side of the centering die facing the punching mechanism. They are symmetrically mounted in the side slots of the two single-piece molds around the mold center. Springs are provided in the slots to fix the individual centering clips and pull the individual centering clips away from each other. The centering clips are stepped thin sheets. Different step positions correspond to the inner walls of pipes of different sizes to achieve adaptive positioning for the inner diameters of pipes of different sizes.

[0011] As a further improvement of the present invention, the punching mechanism includes a punching clamp, a clamping cylinder, a punching oil cylinder, a punch, a punching die core and a punching mounting seat. The punching clamp is composed of two symmetrical single molds, which are movably arranged in the middle of the upper side of the punching mounting seat. Through holes are respectively formed on the top and both sides for the punch and the pipe to pass through when the mold is closed. A pair of clamping cylinders are fixedly arranged on both sides of the punching clamp, and the cylinder body is fixedly connected to the punching mounting seat. The cylinder rods on both sides are respectively fixedly connected to the single mold on one side of the punching clamp to drive the punching clamp to open and close. The punching oil cylinder is fixedly connected to the punching mounting seat and is arranged above the punching clamp. The oil cylinder rod is fixedly connected to the punch to drive it to perform vertical punching movement. The punching die core passes through the side through hole of the punching clamp, and the upper punching cavity corresponds to the upper through hole of the punching clamp. One end of the punching die core is fixedly connected to the guide tube, which is arranged horizontally and fixedly connected to the frame.

[0012] As a further improvement of the utility model, the feeding mechanism comprises a feeding clamp mold, a feeding cylinder and a feeding mounting base. The feeding clamp mold is composed of two symmetrical single molds, and is movably arranged at the upper middle part of the feeding mounting base. A pair of feeding cylinders are fixedly arranged at the two sides of the feeding clamp mold, and the cylinder body is fixedly connected with the feeding mounting base. The cylinder rods at the two sides are fixedly connected with the single molds at one side of the feeding clamp mold to drive the feeding clamp mold to open and close. The lower bottom sides of the feeding mounting base are provided with linear sliding blocks, which are clamped with linear sliding rails fixed on the upper side of the rack to realize horizontal sliding. The two sides of the feeding clamp mold are provided with through holes for the pipe and the guide pipe to pass through when the mold is closed. The through holes are coaxial with the side through holes of the punching clamp mold and the mold center of the centering mold to ensure the coaxiality requirement of the pipe conveying.

[0013] As a further improvement of the utility model, the driving mechanism comprises a motor, a screw rod and a screw nut, and one set of driving mechanism is arranged below the feeding mechanism and the centering clamping mechanism. The motor is fixedly arranged in the lower concave table of the rack, and the motor shaft is fixedly connected with one end of the screw rod to drive it to rotate. The other end of the screw rod is rotatably connected with the rack. The screw nut is sleeved with the screw rod to move horizontally on the rod. The screw nuts below the feeding mechanism and the centering clamping mechanism are fixedly connected with the bottom surfaces of the centering mounting base and the feeding mounting base respectively to drive the two mounting bases to move horizontally under the driving of the screw rod.

[0014] Compared with the prior art, the utility model has the beneficial effects that when the device continuously punches the pipe, the feeding process between the holes is always clamped and supported at both ends of the pipe conveyed by the feeding mechanism and the centering clamping mechanism, and the coaxiality precision between the pipe and the punching clamp mold of the punching mechanism is ensured by the centering clamping mechanism, so that the mold damage caused by the deviation of various pipes is avoided. In addition, the centering clamping mechanism has universality and can adapt to the inner diameters of pipes of different sizes. The device can produce products of different sizes by changing the mold, and can also realize adaptive centering. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic view of the utility model;

[0016] Figure 2 It is the punching mechanism structure schematic view of the utility model;

[0017] Figure 3 It is the feeding mechanism structure schematic view of the utility model;

[0018] Figure 4 It is the centering clamping mechanism structure schematic view of the utility model;

[0019] Figure 5 It is the driving mechanism structure schematic view of the utility model;

[0020] Figure 6This is a schematic diagram of the principle of the centering clip-on pipe fitting of the utility model;

[0021] Description of the numbers in the figure:

[0022] 1. Frame; 2. Punching mechanism; 3. Feeding mechanism; 4. Centering clamping mechanism; 5. Driving mechanism; 201. Punching clamp; 202. Clamping cylinder; 203. Punching cylinder; 204. Punch; 205. Punching die core; 206. Punching mounting seat; 207. Guide tube; 301. Feeding clamp; 302. Feeding cylinder; 303. Feeding mounting seat; 401. Centering die; 402. Centering cylinder; 403. Centering mounting seat; 404. Centering clip; 501. Motor; 502. Screw; 503. Screw nut. DETAILED DESCRIPTION

[0023] Specific embodiment 1: Please refer to Figures 1-6 Attached drawings, including:

[0024] A punching device for steel pipe production comprises a frame 1, a punching mechanism 2, a feeding mechanism 3, a centering and clamping mechanism 4 and a driving mechanism 5.

[0025] The frame 1 is a rectangular metal base. At the center positions on both sides of the upper surface, there is a downwardly recessed space parallel to the longer side for installing the drive mechanism 5. The drive mechanism 5 is set on both sides of the feeding mechanism 3 and the centering clamping mechanism 4. Taking one side of the centering clamping mechanism 4 as an example, the motor 501 is fixed by bolts to the upper surface of the recessed space, located at the right end away from the center of the frame 1. One end of the screw rod 502 is connected to the motor shaft through a coupling, and the other end is rotatably connected to the side wall of the recessed space near the middle of the frame 1 through a bearing. The screw nut 503 matches the screw rod 502, is sleeved on the outer periphery of the screw rod 502, and moves horizontally along the direction of the screw rod under the drive of the motor 501. Similarly, another set of drive mechanisms 5 is set on one side of the feeding mechanism 3 with the same arrangement.

[0026] Two linear slide rails of equal height are respectively provided on the left and right sides of the frame 1 . The linear slide rails are arranged along the longer side of the frame 1 and are fixedly connected to the upper surface of the frame 1 by bolts.

[0027] At the right side linear slide of the frame 1, the linear sliders fixedly mounted on both sides of the lower surface of the centering mounting seat 403 are matched and snap-fitted with the linear slide. The center of the lower surface of the centering mounting seat 403 is fixedly connected to the screw nut 503 below by bolts, and moves horizontally along the direction of the linear slide under the drive of the motor 501. Two rectangular straight plates extend vertically on the left and right sides of the upper surface of the centering mounting seat 403. A pair of centering cylinders 402 are fixed on the vertical rectangular straight plates on both sides with the cylinder rods facing each other. The cylinder rods of the two centering cylinders 402 pass through the rectangular straight plates and extend to the middle of the two plates. The left and right single-piece molds of the centering mold 401 are both arranged in the middle of the two vertical plates. The left and right cylinder rods are respectively connected to the left and right single-piece mold sides of the centering mold 401, driving the two single-piece molds to perform opening and closing operations. The centering mold 401 has two vertical grooves on one side facing the middle of the frame 1, with two grooves on each single mold. The wider side of the stepped centering flap 404 is matched and embedded in the groove, and can slide freely in the groove. The length of the groove is longer than the wider side of the centering flap 404. A spring is installed in the empty space in the groove to fix the side wall of the groove and the wider side wall of the centering flap 404. Under the contraction of the spring, the centering flap 404 in the groove is pulled to move away from each other. After installing the four centering flaps 404 and closing the mold left and right, the four centering flaps 404 are evenly arranged circumferentially with respect to the side of the center of the mold.

[0028] At the left linear slide of the frame 1, the linear sliders fixedly mounted on both sides of the lower surface of the feeding mounting seat 303 are matched and clamped with the linear slide. The center of the lower surface of the feeding mounting seat 303 is fixedly connected to the screw nut 503 below by bolts. Driven by the motor 501, it moves horizontally along the direction of the linear slide. Two rectangular straight plates extend vertically on the left and right sides of the upper surface of the feeding mounting seat 303. A pair of feeding cylinders 302 are fixed on the vertical rectangular straight plates on both sides with the cylinder rods facing each other. The cylinder rods of the two feeding cylinders 302 pass through the rectangular straight plates and extend to the middle of the two plates. The left and right single molds of the feeding clamp 301 are both set in the middle of the two vertical plates. The left and right cylinder rods are respectively connected to the sides of the left and right single molds of the feeding clamp 301, driving the two single molds to open and close the molds. A circular through hole is opened in the middle of the side of the feeding clamp 301 after the mold is closed. Its size matches the outer wall size of the corresponding processed pipe fitting. The feeding clamp 301 can be disassembled and replaced as needed to match different pipe fitting products.

[0029] In the middle of the rack 1, fixedly provided with punching mechanism 2, the punch mounting seat 206 of punching mechanism 2 is fixedly welded to the upper surface of the rack 1. On both sides of the punch mounting seat 206, two rectangular vertical plates extend upward, and a pair of die clamping cylinders 202 are fixed on the two vertical rectangular plates in opposite directions of the cylinder rod. The left and right two single dies of the punch die 201 are connected with the cylinder rods of the die clamping cylinders 202 respectively, and the opening and closing of the dies are realized under the action of the die clamping cylinders 202. The upper side and both sides of the punch die 201 are respectively provided with through holes for the punch 204 and the pipe to pass through during die closing, and different punch dies 201 can be replaced to match different pipe products. Four vertical columns are fixedly arranged on the upper surface of the punch mounting seat 206, and a top plate is connected to the top ends of the vertical columns. The punch oil cylinder 203 is fixedly arranged on the upper surface of the top plate, and the oil cylinder rod extends to the upper side of the punch die 201 through the top plate. The oil cylinder rod is fixedly connected with the punch 204 below, and the position is vertically corresponding to the through hole above the punch die 201. Under the drive of the punch oil cylinder 203, the head end of the punch 204 can extend into the through hole to punch. The die head of the punch die core 205 extends into the side hole of the punch die 201, and the punch forming cavity above the die head is vertically corresponding to the through hole above the punch die 201 while keeping concentric with the side hole. One end of the punch die core 205 on the left side is fixedly connected with the guide pipe 207, and the guide pipe 207 is fixedly connected with the connecting plate in the middle of the left end of the rack 1 to realize the transverse fixation of the guide pipe 207 and the punch die core 205.

[0030] Working principle: The linear slide rails on the rack 1 are horizontally arranged, the side hole through hole of the punch die 201 of the punch mechanism 2 after installation, the die closing center of the feeding die 301 of the feeding mechanism 3 and the center clamping mechanism 4 are on the same axis. The pipe to be processed is sleeved outside the guide pipe 207, and one end is clamped by the feeding die 301 of the feeding mechanism 2 after die closing. The other end is clamped by the center clamping mechanism 4 as shown in the drawing, and the die is opened and pressurized to expand the center clamping mechanism 4 to support and position the pipe. Figure 6 The center clamping mechanism 4 always provides coaxiality guaranteed support clamping during the opening of the punch mechanism 2 and the feeding of the pipe by the feeding mechanism 3, and moves with the feeding mechanism 3 at the same distance under the drive of the driving mechanism 5, so as to avoid the deviation of the coaxiality due to the sagging of the pipe due to its own weight or the friction between the punch 204 and the pipe wall when the punch 204 is separated from the processing hole, and to avoid die closing damage.

[0031] The above only describes the preferred embodiments of the present application, and is not intended to limit the purpose, and various modifications, replacements and substitutions within the spirit and principles of the design are within the protection scope of the present application.

Claims

1. A punching device for steel pipe production, characterized by: A frame (1), a punching mechanism (2), a feeding mechanism (3), a centering and clamping mechanism (4), and a driving mechanism (5); The punching mechanism (2) is fixedly arranged in the middle of the frame (1), and is located between the feeding mechanism (3) and the centering clamping mechanism (4); The feeding mechanism (3) is movably arranged on one side above the frame (1); the output end of the feeding mechanism (3) is used to clamp the pipe fitting and has the ability to move horizontally toward the punching mechanism (2) to achieve feeding; The centering clamping mechanism (4) is movably arranged on the other side above the frame (1). The output end of the centering clamping mechanism (4) is used to clamp the pipe fitting and position the pipe fitting, and has the ability to move horizontally away from the punching mechanism (2); The driving mechanism (5) is respectively arranged below the feeding mechanism (3) and the centering clamping mechanism (4); the driving mechanism (5) is arranged on the upper side of the frame (1); the driving mechanism (5) is movably connected to the corresponding feeding mechanism (3) and the centering clamping mechanism (4) to drive the two to realize their respective horizontal movements.

2. The punching device for steel pipe production according to claim 1, characterized in that: Two straight slide rails of equal height are fixedly provided on both sides of the frame (1), and the frame table between the slide rails is concave for installing the driving mechanism (5).

3. The punching device for steel pipe production according to claim 2, characterized in that: The centering clamping mechanism (4) comprises a centering die (401), a centering cylinder (402) and a centering mounting seat (403); the centering die (401) is composed of two symmetrical single-piece dies, which are movably arranged at the upper middle part of the centering mounting seat (403); a pair of centering cylinders (402) are fixedly arranged on both sides of the centering die (401), and the cylinder bodies are fixedly connected to the centering mounting seat (403), and the cylinder rods on both sides are fixedly connected to the single-piece dies on one side of the centering die (401) to drive the centering die (401) to open and close; the bottom of the centering mounting seat (403) is provided on both sides. A linear slider is provided, which is engaged with a linear slide rail fixed on the upper side of the frame (1) to achieve horizontal sliding; a set of centering clips (404) is movably provided on one side of the centering die (401) facing the punching mechanism (2), which is symmetrically installed in the side slots of the two single-piece dies around the mold center, and a spring is provided in the slot to be fixedly connected with a single centering clip (404), pulling the single centering clip (404) to move away from each other; the centering clip (404) is a stepped thin sheet, and different stepped positions correspond to the inner walls of pipes of different sizes, so as to achieve adaptive positioning for the inner diameters of pipes of different sizes.

4. The punching device for steel pipe production according to claim 3, characterized in that: The punching mechanism (2) comprises a punching clamp (201), a clamping cylinder (202), a punching oil cylinder (203), a punch (204), a punching die core (205) and a punching mounting seat (206); the punching clamp (201) is composed of two symmetrical single molds, which are movably arranged in the middle of the upper side of the punching mounting seat (206), and are respectively provided with through holes on the upper side and both sides for the punch (204) and the pipe to pass through when the mold is closed; a pair of clamping cylinders (202) are fixedly arranged on both sides of the punching clamp (201), the cylinder body and the punching mounting seat (206) are fixedly connected, and the cylinder rods on both sides are respectively connected to the punching clamp ( The punching die (201) is fixedly connected to a single mold on one side to drive the punching die (201) to open and close; the punching cylinder (203) is fixedly connected to the punching mounting seat (206) and is arranged above the punching die (201); the cylinder rod is fixedly connected to the punch (204) to drive it to perform punching movement in the vertical direction; the punching die core (205) passes through the side through hole of the punching die (201), and the upper punching cavity corresponds to the upper through hole of the punching die (201); one end of the punching die core (205) is fixedly connected to the guide tube (207), and the guide tube (207) is horizontally arranged and fixedly connected to the frame (1).

5. The punching device for steel pipe production according to claim 4, characterized in that: The feeding mechanism (3) comprises a feeding clamp (301), a feeding cylinder (302) and a feeding mounting seat (303); the feeding clamp (301) is composed of two symmetrical single molds, which are movably arranged at the upper middle part of the feeding mounting seat (303); a pair of feeding cylinders (302) are fixedly arranged on both sides of the feeding clamp (301), and the cylinder bodies and the feeding mounting seat (303) are fixedly connected, and the cylinder rods on both sides are respectively connected to the single molds on one side of the feeding clamp (301). The mold is fixedly connected to drive the feeding clamp (301) to open and close; linear slides are provided on both sides of the lower bottom of the feeding mounting seat (303), which are engaged with the linear slide rails fixed on the upper side of the frame (1) to achieve horizontal sliding; through holes are provided on both sides of the feeding clamp (301) for the pipe fittings and the guide tube (207) to pass through when the mold is closed, and the through holes are coaxial with the side through holes of the punching clamp (201) and the mold closing center of the centering mold (401) to ensure the coaxiality requirement when the pipe fittings are conveyed.

6. The punching device for steel pipe production according to claim 5, characterized in that: The driving mechanism (5) comprises a motor (501), a screw rod (502) and a screw nut (503), and a set of driving mechanisms (5) is respectively provided below the feeding mechanism (3) and the centering clamping mechanism (4); the motor (501) is fixedly provided in the concave table of the frame (1), and the motor shaft is fixedly connected to one end of the screw rod (502) to drive the rotation thereof; the other end of the screw rod (502) is rotatably connected to the frame (1); the screw nut (503) is sleeved with the screw rod (502) and moves horizontally on the rod; the screw nuts (503) under the feeding mechanism (3) and the centering clamping mechanism (4) are respectively fixedly connected to the bottom surfaces of the centering mounting seat (403) and the feeding mounting seat (303), so as to drive the two mounting seats to move horizontally under the drive of the screw rod (502).

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