Punching and flanging mechanism

Abstract

The utility model provides a punching and flanging mechanism, which relates to the technical field of machining equipment and comprises a base frame, a first linear driving system and an execution component. The executing assembly comprises a dynamic punching module, the dynamic punching module comprises an inner shaft moving in the axial direction, a fixed sleeve assembly and a punching head, the output end of the first linear driving system is connected with the inner shaft, the sleeve assembly is fixed to the base frame, and the punching head and the inner shaft form a slope linkage oblique inserting mechanism with the radial displacement conversion function. And radial movement track limitation is kept through a guide restraining mechanism and a sleeve assembly, wherein the guide restraining mechanism and the sleeve assembly are coaxially connected with a precise lead screw guide rail of a precise speed reducer through a servo motor. The multi-hole punching and flanging device has the advantages that one-time stretching forming of punching and flanging is achieved, the secondary working procedure that bottom holes are punched firstly and stretching is conducted twice in the traditional process is avoided, the one-time multi-hole machining process can be achieved by moving the servo lead screw back and forth to different positions, the machining period is shortened, precision is achieved, and work efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing equipment technology, and in particular to a punching and flanging mechanism. Background Technology

[0002] Metal pipe fittings (such as round pipes, square pipes, and special-shaped pipes) often require punching equipment during processing. However, metal pipe punching equipment faces the common technical challenge of waste residue in the pipe processing field. Taking a reciprocating punching equipment for metal pipe fittings disclosed in Chinese Patent 202411648866.3 as an example, its main structural components are "including a punching unit and a support component, wherein the punching unit includes a punching column, which can reciprocate to punch the pipe fitting, and the support component can support the inner wall of the pipe fitting"; its punching working principle is "one end of the metal pipe fitting is placed in a first sleeve, a first motor drives a turntable to rotate, the driving column moves downward from the highest position as the turntable rotates, the driving column drives a strip ring to move downward, the strip ring drives the punching column to move downward, and the punching column punches and flangs the metal pipe fitting."

[0003] In other words, although the outward-to-inward punching mode can achieve hole processing, the metal scrap generated during the punching process is forced into the tube cavity due to the direction of kinetic energy transfer, resulting in the need for a subsequent cleaning process in each processing cycle. This prevents the achievement of punching multiple holes at once and significantly reduces production line efficiency. Therefore, there is a need to disclose a punching and flanging mechanism for metal tube processing to overcome the above-mentioned defects. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art and provides a punching and flanging mechanism that realizes the synchronous action of punching and waste removal. It can punch multiple holes at once and achieve punching and flanging in one stretching process, avoiding the two-step process of punching the bottom hole and stretching in the traditional process. It can also achieve multi-hole processing in one step by moving the servo screw back and forth to different positions, shortening the processing cycle, improving precision and work efficiency.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A punching and flanging mechanism includes a base frame, a first linear drive system, and an execution component;

[0007] The execution component includes a coaxially arranged dynamic punching module, which includes an axially movable inner shaft, a fixed sleeve assembly, and a punching head. The output end of the first linear drive system is connected to the inner shaft. The sleeve assembly is fixed on the base frame. The inner shaft and the sleeve assembly form an axial sliding pair. The punching head and the inner shaft form a sloping joint with radial displacement conversion. The radial movement trajectory is limited by the guide constraint mechanism and the sleeve assembly.

[0008] Further, the guiding constraint mechanism comprises a radial through hole opened in the sleeve assembly in a circumferential direction, and the punch head is movably arranged in the radial through hole; the inclined linkage inclined insertion mechanism comprises an inclined guide groove arranged on the inner shaft and a U-shaped clamping part arranged on the punch head, and the punch head is slidably connected to the inclined guide groove through the U-shaped clamping part; the punch head is guided to move radially by the U-shaped clamping part and the inclined guide groove.

[0009] Further, the inner shaft comprises a cylindrical segment and a rectangular cross-section guiding segment arranged coaxially, and the sleeve assembly is provided with an anti-rotation guiding hole matched with the shape of the rectangular cross-section guiding segment; an annular limiting step is arranged between the cylindrical segment and the rectangular cross-section guiding segment, and an end surface of the sleeve assembly is in contact with the annular limiting step to form an axial stop.

[0010] Further, the first linear driving system comprises a first servo motor and a first screw nut pair driven by the first servo motor, the first screw nut pair is connected to a moving seat, the moving seat is slidably connected to a base frame, and the inner shaft is connected to the moving seat; an axis of the first screw nut pair is parallel to a sliding direction of the moving seat.

[0011] Further, the base frame is slidably connected to a mounting plate, and the second linear driving system comprises a second servo motor and a second screw nut pair driven by the second servo motor, the second screw nut pair is connected to the base frame, and a movement direction of the second screw nut pair is coincident with an axis of the inner shaft.

[0012] Further, the base frame comprises a fixed seat, the fixed seat comprises a bottom plate and a detachably arranged pressing plate, and the bottom plate and the pressing plate are wrapped to form a mounting hole; symmetrical two sides of the sleeve assembly are provided with positioning grooves, and the sleeve assembly is matched with the mounting hole through the two side positioning grooves to realize quick disassembly and assembly and circumferential positioning.

[0013] Further, the contact surface between the front end of the inner shaft and the U-shaped clamping part is a conjugate inclined surface group, and the inclined angle of the inclined surface is consistent with the angle of the inclined guide groove, so that force transmission is ensured without interference.

[0014] Further, an end portion of the sleeve assembly is provided with a guiding chamfer.

[0015] Further, the angle of the guiding chamfer is 30°-45°, and a hardening treatment layer is arranged on the surface of the guiding chamfer.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The utility model discloses a first linear drive system, executive component, second linear drive system etc. a plurality of components cooperate to use, and the whole executive component is inserted to the set position in the metal pipe spare, then control inner shaft and go out and top punch punch head to the up, thereby punch in the metal pipe spare from inside to outside, in the punch process, punch head will produce annular waste completely push out processing area while penetrating the wall, to realize punch and synchronous action of waste removal, avoid the secondary cleaning process caused by the chip residue in traditional craft, shorten the processing period, improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the utility model, together with embodiments of the utility model to explain the utility model, and do not constitute limitations to the utility model, and in the drawings:

[0019] Figure 1 It is the general view of punch flanging mechanism that the utility model discloses, and it is the general view of punch flanging mechanism that the utility model discloses;

[0020] Figure 2 It is the side view of punch flanging mechanism that the utility model discloses, and it is the side view of punch flanging mechanism that the utility model discloses;

[0021] Figure 3 It is the sectional view of punch flanging mechanism that the utility model discloses, and it is the sectional view of punch flanging mechanism that the utility model discloses;

[0022] Figure 4 It is the schematic diagram of the separation state of executive component and fixed seat, and it is the schematic diagram of the separation state of executive component and fixed seat;

[0023] Figure 5 It is the schematic diagram of the combination state of inner shaft and sleeve assembly, and it is the schematic diagram of the combination state of inner shaft and sleeve assembly;

[0024] Figure 6 It is the local enlarged view of the separation state of inner shaft and sleeve assembly Figure 1 ;

[0025] Figure 7 It is the local enlarged view of the separation state of inner shaft and sleeve assembly Figure 2 .

[0026] In the drawings:

[0027] 1, base frame; 101, fixed seat; 1011, bottom plate; 1012, pressing plate; 1013, mounting hole; 2, first linear drive system; 201, first servo motor; 202, first coupling; 203, first screw; 204, first screw nut; 3, execution assembly; 301, inner shaft; 3011, inclined guide groove; 3012, cylindrical section; 3013, rectangular cross-section guide section; 3014, annular limiting step; 302, sleeve assembly; 3021, radial through hole; 3022, anti-rotation guide hole; 3023, positioning groove; 3024, guide chamfer; 303, punching head; 3031, U-shaped clamping part; 4, moving seat; 5, second linear drive system; 501, second servo motor; 502, second coupling; 503, second screw; 504, second screw nut; 6, mounting plate. DETAILED DESCRIPTION

[0028] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0029] As Figures 1 to 6 shown, the utility model claims a punching flanging mechanism, including base frame 1, first linear drive system 2 and execution assembly 3;Wherein, execution assembly 3 includes coaxial setting dynamic punching module, dynamic punching module includes axial motion inner shaft 301, fixed sleeve assembly 302 and punching head 303, base frame 1 includes fixed seat 101, fixed seat 101 includes bottom plate 1011 and detachable setting pressing plate 1012, bottom plate 1011 and pressing plate 1012 are enclosed and formed with mounting hole 1013, sleeve assembly 302 is fixed in mounting hole 1013, in combination Figure 4 It can be seen that the symmetrical two sides of sleeve assembly 302 are provided with positioning groove 3023, and the width of positioning groove 3023 is matched with the distance between the two sides of sleeve assembly 302, so that sleeve assembly 302 is matched with mounting hole 1013 through the two sides positioning groove 3023 to realize quick disassembly and circumferential positioning;After the pressing plate 1012 is disassembled upwards, the sleeve assembly 302 is placed in the lock, and the operation is convenient.

[0030] The output end of first linear drive system 2 is connected with inner shaft 301, sleeve assembly 302 is fixed on fixed seat 101 of base frame 1, inner shaft 301 and sleeve assembly 302 form axial sliding pair, that is, first linear drive system 2 drives inner shaft 301 to slide axially in sleeve assembly 302.

[0031] The first linear drive system 2 comprises a first servo motor 201 and a first screw-nut pair driven thereby, the first screw-nut pair being connected to a moving seat 4, the moving seat 4 being slidingly connected to the base frame 1, an inner shaft 301 being connected to the moving seat 4, and an axis of the first screw-nut pair being parallel to a sliding direction of the moving seat 4. Figure 3 As can be seen, the first screw-nut pair comprises a first screw rod 203 and a first screw nut 204 connected to the moving seat 4, the first servo motor 201 being connected to a first coupling 202, the first coupling 202 being connected to the first screw rod 203, and the first screw rod 203 being connected to the first screw nut 204, so that the first servo motor 201 can ultimately drive the moving seat 4 to slide, i.e., control the movement of the inner shaft 301, according to the working principle of the screw-nut pair.

[0032] The punching head 303 and the inner shaft 301 form a bevel linkage oblique insertion mechanism with radial displacement conversion, and a guiding constraint mechanism of precise screw rod guide rail movement of a coaxial connection precision speed reducer of a servo motor and a sleeve assembly 302 keep the radial movement track restriction. The guiding constraint mechanism comprises a radial through hole 3021 formed in the sleeve assembly 302 in the circumferential direction, and the punching head 303 is movably arranged in the radial through hole 3021. The bevel linkage oblique insertion mechanism comprises an inclined guide groove 3011 on the inner shaft 301 and a U-shaped clamping portion on the punching head 303, and the punching head 303 is slidingly connected to the inclined guide groove 3011 through the U-shaped clamping portion. The punching head 303 is matched with the inclined guide groove 3011 through the U-shaped clamping portion, so that the axial movement of the inner shaft 301 drives the radial movement of the punching head 303.

[0033] That is, the reciprocating movement of the inner shaft 301 in the axial direction is to drive the punching head 303 to move up and down in the radial direction. The working principle of this punching is that the entire execution assembly 3 is inserted into the metal pipe, and the appropriate size of the execution assembly 3 can be selected according to the diameter of the different metal pipes. Then the inner shaft 301 extends to push the punching head 303 upwards, so as to punch from the inside to the outside in the metal pipe, and the generated metal waste will be pushed out and will not fall into the metal pipe, without the need for subsequent cleaning, thereby improving the production efficiency.

[0034] From Figure 6 and Figure 7 As can be seen, the inner shaft 301 comprises a cylindrical segment 3012 and a rectangular cross-section guide segment 3013 arranged coaxially, and the sleeve assembly 302 is provided with an anti-rotation guide hole 3022 matched with the shape of the rectangular cross-section guide segment 3013. The inner shaft 301 is inserted into the anti-rotation guide hole 3022 for guidance in the axial movement, wherein an annular limiting step 3014 is arranged between the cylindrical segment 3012 and the rectangular cross-section guide segment 3013, and the annular limiting step 3014 is in contact with an end surface of the sleeve assembly 302 to form an axial stop, so as to avoid the inner shaft 301 from being excessively pushed out.

[0035] Since the metal pipe is punched at different positions during processing, the execution assembly 3 needs to be moved as a whole to control the penetration depth in the metal pipe, so the structure further comprises a second linear drive system 5 and a mounting plate 6, the base frame 1 is slidingly connected to the mounting plate 6; the mounting plate 6 is used for being fixed to an external machine, the second linear drive system 5 comprises a second servo motor 501 and a second screw nut pair driven by the second servo motor 501, the movement direction of the second screw nut pair coincides with the axis of the inner shaft 301, the second screw nut pair is connected with the base frame 1, the second screw nut pair comprises a second screw rod 503 and a second screw nut 504 connected to the base frame 1, the second screw nut 504 is connected with the second screw rod 503, the second screw rod 503 is connected with a second coupling 502, the second servo motor 501 drives the second coupling 502 to move, drives the second screw rod 503 to rotate, and finally controls the movement of the base frame 1, that is, the penetration depth of the execution assembly 3 in the metal pipe can be controlled, the movement walks at different positions of the metal pipe, and the functions of punching multiple holes and flanging on the metal pipe can be realized, and then the first linear drive system 2 controls the movement of the inner shaft 301 to punch holes.

[0036] The contact surface between the front end of the inner shaft 301 and the U-shaped clamping part is a conjugate slope group, which is combined with Figure 6 And Figure 7 The conjugate slope group comprises a smooth upward slope at the front end of the inner shaft 301 and a smooth downward slope in the U-shaped clamping part, so that the front end of the inner shaft 301 can be smoothly inserted into the U-shaped clamping part to enable the punching head 303 to move; and the inclination angle of the above-mentioned slope is consistent with the angle of the inclined guide groove 3011, so as to ensure that the force transmission is not interfered.

[0037] The sleeve assembly 302 is used for penetrating into the inside of the metal pipe, so that a guide chamfer 3024 is arranged at the end of the sleeve assembly 302, so that the front end of the sleeve assembly 302 can be smoothly inserted. The angle of the guide chamfer 3024 is 30°-45°, and the surface of the guide chamfer 3024 is provided with a hardening treatment layer, which can be a quenching hardening layer, a carburizing layer and the like, which is helpful to improve the hardness, wear resistance and corrosion resistance of the guide chamfer 3024 and the like.

[0038] The utility model discloses a first linear drive system, execution assembly, second linear drive system and a plurality of components cooperate to use, the execution assembly 3 is inserted into the set position in the metal pipe as a whole, then controls the punching head 303 to be pushed up by the inner shaft 301 to extend, so as to punch from inside to outside in the metal pipe, in the punching process, the punching head 303 will completely push out the annular waste generated when penetrating the pipe wall from the processing area, to realize the synchronous action of punching and waste removal, avoid the secondary cleaning process caused by the residual of the traditional process scraps, shorten the processing period, improve the work efficiency.

[0039] The above-mentioned flanging refers to the action of ejecting the punched-out scrap outside the metal tube.

[0040] Finally, it should be noted that the above is only the preferred embodiments of the present application, and is not intended to limit the present application, although the present application is described in detail with reference to the embodiments, for those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A piercer-flanger mechanism characterized by, The base frame (1), the first linear drive system (2) and the execution assembly (3) are included. The execution assembly (3) includes a coaxial dynamic piercing module, which includes an axially moving inner shaft (301), a fixed sleeve assembly (302) and a piercing head (303). The output end of the first linear drive system (2) is connected with the inner shaft (301), the sleeve assembly (302) is fixed on the base frame (1), the inner shaft (301) and the sleeve assembly (302) form an axial sliding pair, the piercing head (303) and the inner shaft (301) form a bevel linkage oblique insertion mechanism with radial displacement conversion, and the piercing head (303) is limited in radial movement track by the guide constraint mechanism and the sleeve assembly (302).

2. The piercer-flanger mechanism of claim 1 wherein, The guide constraint mechanism includes a radial through hole (3021) circumferentially formed on the sleeve assembly (302), and the piercing head (303) is movably arranged in the radial through hole (3021); the bevel linkage oblique insertion mechanism includes an inclined guide groove (3011) on the inner shaft (301) and a U-shaped clamping portion on the piercing head (303), and the piercing head (303) is slidably connected to the inclined guide groove (3011) through the U-shaped clamping portion; the piercing head (303) is connected to the inclined guide groove (3011) through the U-shaped clamping portion, so that the axial movement of the inner shaft (301) drives the radial movement of the piercing head (303).

3. The piercer-flanger apparatus of claim 1 wherein, The inner shaft (301) includes a coaxially arranged cylindrical segment (3012) and a rectangular cross-section guide segment (3013), and the sleeve assembly (302) is provided with a rotation-preventing guide hole (3022) matched with the shape of the rectangular cross-section guide segment (3013); an annular limiting step (3014) is arranged between the cylindrical segment (3012) and the rectangular cross-section guide segment (3013), and an axial stop is formed by the contact between the annular limiting step (3014) and the end surface of the sleeve assembly (302).

4. The piercer-flanger apparatus of claim 3 wherein, The first linear drive system (2) includes a first servo motor (201) and a first screw nut pair driven by the first servo motor (201), the first screw nut pair is connected with a moving seat (4), the moving seat (4) is slidably connected to the base frame (1), the inner shaft (301) is connected to the moving seat (4), and the screw axis of the first screw nut pair is parallel to the sliding direction of the moving seat (4). The base frame (1) is slidably connected to a mounting plate (6), the second linear drive system (5) includes a second servo motor (501) and a second screw nut pair driven by the second servo motor (501), the second screw nut pair is connected with the base frame (1), and the movement direction of the second screw nut pair is coincident with the axis of the inner shaft (301).

5. The piercer-flanger apparatus of claim 1 wherein, The base frame (1) includes a fixed seat (101), the fixed seat (101) includes a bottom plate (1011) and a detachably arranged pressing plate (1012), the bottom plate (1011) and the pressing plate (1012) are wrapped to form a mounting hole (1013); the sleeve assembly (302) is provided with positioning grooves (3023) on both sides, and the sleeve assembly (302) is matched with the mounting hole (1013) through the positioning grooves (3023) on both sides to realize quick disassembly and assembly and circumferential positioning.

6. The piercer-flanger apparatus of claim 2 wherein, The contact surface of the inner shaft (301) front end and the U-shaped clamping part is a conjugate bevel group, the bevel angle is consistent with the angle of the inclined guide groove (3011), and interference-free force transmission is ensured.

7. The piercer-flanger apparatus of claim 2 wherein, The end of the sleeve assembly (302) is provided with a guide chamfer (3024).

8. The piercer-flanger mechanism of claim 7 wherein, The angle of the guide chamfer (3024) is 30°-45°, and the surface of the guide chamfer (3024) is provided with a hardening treatment layer.

Images