CN219093280U - Shell equal-diameter flanging die and flanging tool of flanging machine - Google Patents

Abstract

The utility model relates to a shell equal-diameter flanging die and a flanging tool of a flanging machine. The current turn-ups frock can't realize the equal diameter turn-ups of little tube shell. The utility model provides a shell equal-diameter flanging die of a flanging machine, which comprises a male die, a female die and a male die pull rod, wherein the shell is arranged on the female die, the male die axially enters the shell from the shell, the male die pull rod enters a male die structure from the female die and passes through a prefabricated hole to enter the male die structure, the inner periphery of the male die structure is meshed and matched, the male die structure is pulled out of the prefabricated hole, and the outer periphery of the male die is provided with a conical surface, so that the male die integrally flanging is carried out on the prefabricated hole when passing through the prefabricated hole; the flanging tool is characterized in that a conveying rod is inserted into the mechanical arm of the flanging machine, the male die is inserted into the conveying rod and conveyed into the tube shell through the mechanical arm, the conveying rod is withdrawn from the tube shell after the male die pull rod is meshed with the male die, and the male die pull rod radially pulls out the male die from the prefabricated hole under the driving of the other mechanical arm. The die disclosed by the utility model enables the thickness of the flanging to be consistent, and cracks are not easy to generate.

Description

Shell equal-diameter flanging die and flanging tool of flanging machine

Technical Field

The utility model relates to a tube shell prefabricated hole flanging device matched with a high-voltage switch, in particular to a tube shell constant-diameter flanging die and a flanging tool of a flanging machine.

Background

The existing high-voltage switch matched tube shell is provided with a large-diameter main tube turning small-diameter drawing port, the diameter of the main tube of the shell is small, phi 356x8 aluminum tubes 6005A-H112 are adopted for the equal-diameter flanging tube shell, the existing flanging equipment is used for flanging a medium-large-size shell, the radial size of a mechanical arm is larger than that of the aluminum tubes, the mechanical arm cannot convey a male die to the inside of the main tube, therefore, a flanging tool is vertically fed along the prefabricated hole end of the tube shell for flanging, the flanging tool stretches into a prefabricated hole to clamp the edge of the prefabricated hole for rotating outwards to form a flanging, but the edge of the prefabricated hole cannot be uniformly stressed when the flanging tool is used for flanging, and therefore, the small-diameter tube shell is easy to cause inconsistent thickness of the flanging edge to generate cracks.

Disclosure of Invention

Aiming at the problems, the utility model aims to provide a shell equal-diameter flanging die and a flanging tool of a flanging machine, which are conveyed to the inside of a shell by a transverse mechanical arm carrying a male die and matched with a female die to realize the flanging of a prefabricated hole of the shell, so that the flanging of the prefabricated hole of a small-diameter shell is realized, and meanwhile, the thickness of the flanging edge is uniform and consistent, and no crack is generated.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the shell equal-diameter flanging die of the flanging machine comprises a male die, a female die and a male die pull rod, wherein the female die is fixed with the shell, and a prefabricated hole on the shell faces to the bottom of the female die, and is characterized in that: the male die comprises a male die head and a male die handle arranged on the male die head, wherein a cavity is arranged in the male die head, a plurality of first convex teeth are circumferentially arranged on the inner peripheral surface of the cavity at intervals, a first groove is formed in a space between every two adjacent first convex teeth, and a certain interval space is formed between the upper end surface of each first convex tooth and the upper end surface of the cavity; the male die pull rod comprises a pull rod shaft, a plurality of second convex teeth which are in sliding fit with the corresponding first concave grooves are circumferentially arranged on the peripheral surface of the upper end part of the pull rod shaft at intervals, and second concave grooves which are in sliding fit with the corresponding first convex teeth are formed in spaces between the adjacent second convex teeth; the female die comprises a female die bottom ring, a female die middle cylinder and a female die supporting plate which are connected up and down in sequence, and a through hole penetrating through the female die middle cylinder and the female die bottom ring is formed in the female die supporting plate; the shell is fixed on the female die supporting plate, the male die axially enters the upper part of the prefabricated hole in the shell and then is pulled out of the prefabricated hole by the male die pull rod radially entering from the female die to turn over the prefabricated hole.

Further, the male die pull rod stretches into the hole cavity to rotate so that the second convex teeth are embedded in the interval space at the upper end of the first convex teeth to be meshed with the first convex teeth.

Further, the upper surface of the female die supporting plate is an arc-shaped surface matched with the periphery of the tube shell, and the through hole penetrates through the arc-shaped surface.

Further, the male die handle and the male die head are connected and fixed into a whole by adopting screws.

Further, the lower end of the male die head is a conical surface body, and the upper end of the male die handle is provided with a convex cover with a T-shaped structure.

The utility model also provides a tube shell equal-diameter flanging tool of the flanging machine, which comprises the tube shell radial hole flanging die and further comprises a conveying rod, wherein a convex cover of the male die is inserted into one end part of the conveying rod, the other end of the conveying rod is inserted into a mechanical arm of the flanging machine and is in sliding connection with the mechanical arm, the female die is fixed on a chassis of the flanging machine, the mechanical arm axially moves to convey the male die into the tube shell, and the male die pull rod passes through the chassis to the male die to pull out the male die from the prefabricated hole.

Further, a U-shaped socket is formed at one end of the conveying rod, and the convex cover is inserted into the U-shaped socket; the other end of the conveying rod is provided with a positioning groove, the positioning groove is axially formed along the periphery of the conveying rod, and the mechanical arm is provided with a positioning pin inserted into the positioning groove.

Further, a shaft hole for accommodating the male die pull rod to pass through is formed in the middle of the underframe.

By adopting the technical scheme, the utility model has the following advantages and effects:

(1) According to the shell equal-diameter flanging die, the male die mechanism and the female die are matched to realize flanging, the shell is fixed on the female die, the male die enters the prefabricated hole Fang Guanke, the male die is pulled out of the prefabricated hole after penetrating through the prefabricated hole to enter the interior of the male die to be meshed with the inner cavity of the male die through the male die pull rod, the periphery of the male die is in a conical surface structure, the conical surface periphery of the male die can integrally expand and extend the prefabricated hole to form flanging, and the flanging thickness is uniform and consistent.

(2) The inner periphery of the male die is provided with the first convex teeth and the first grooves, the outer periphery of the male die pull rod is provided with the second convex teeth and the second grooves which are matched with the first grooves and the first convex teeth in direction, the first convex teeth can axially move along the second grooves, the second convex teeth can axially move along the first grooves, and the second convex teeth can be simultaneously rotatably positioned at the upper ends of the first convex teeth in the upper end hole cavities of the male die and are engaged with the upper ends and the lower ends of the first convex teeth, so that the male die pull rod can pull the male die out of the tube shell along the prefabricating holes, and the whole outer peripheral edge flanging of the prefabricating holes is realized.

(3) According to the shell equal-diameter flanging tool, the conveying rod is connected in a sliding mode on the mechanical arm on the flanging machine, the conveying rod can extend out of the U-shaped slot at the front end of the conveying rod along the axial direction of the mechanical arm in a sliding mode and is fixed, the male die handle of the male die is inserted into the U-shaped slot at the front end of the conveying rod, after the mechanical arm moves to drive the conveying rod to convey the male die into the shell, the mechanical arm can drive the conveying rod to withdraw from the shell at the same time, and the male die can be left in the shell to be matched with the male die pull rod to realize prefabricated hole flanging, so that the flanging tool can realize flanging only by improving the mechanical arm of the existing flanging machine, the flanging machine structure is not required to be redesigned, and the manufacturing cost is effectively saved.

Drawings

Fig. 1 is a schematic cross-sectional enlarged structure of a male die of the present utility model.

Fig. 2 is a view in the A-A direction of fig. 1.

Fig. 3 is an enlarged schematic view of the structure of the female die of the present utility model.

Fig. 4 is a side view of fig. 3.

Fig. 5 is a B-B view of fig. 4.

Fig. 6 is an enlarged schematic view of the axial structure of the punch pull rod of the present utility model.

Fig. 7 is a top view of fig. 6.

Fig. 8 is a schematic structural diagram of the flanging tool.

The novel die comprises a 1-mechanical arm, a 2-conveying rod, a 3-male die, a 4-female die, a 5-tube shell, a 6-underframe, a 7-male die pull rod, 011-locating pins, 021-locating grooves, 022-U-shaped sockets, 023-rod bodies, 031-male die handles, 032-screws, 033-male die heads, 0331-first male teeth, 0332-first grooves, 041-female die bottom rings, 042-female die middle cylinders, 043-female die supporting plates, 0431-through holes, 051-prefabricated holes, 071-second male teeth, 072-second grooves and 073-pull rod shafts.

Detailed Description

The following detailed description of the embodiments of the present utility model will be provided with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the utility model, but rather are merely illustrative of the true spirit of the utility model.

The utility model provides a shell equal-diameter flanging die of a flanging machine and a flanging tool thereof, wherein the flanging die comprises a male die, a female die and a male die pull rod, the shell is arranged on the female die, the male die axially enters the shell above a prefabricated hole from the shell, the male die pull rod axially enters the male die structure from the female die through the prefabricated hole, the male die pull rod is meshed and matched with the inner periphery of the male die structure, the male die structure is pulled out of the prefabricated hole, and the male die integrally flanging the prefabricated hole when passing through the prefabricated hole due to the conical surface of the outer periphery of the male die, so that the flanging thickness is consistent and cracks are not easy to generate. The flanging tool is characterized in that the conveying rod is inserted into the mechanical arm of the flanging machine, the male die is inserted into the conveying rod, the mechanical arm drives the conveying rod to convey the male die into the pipe shell, the conveying rod is withdrawn from the pipe shell after the male die pull rod is meshed with the male die, and the male die pull rod radially pulls out the male die from the prefabricated hole under the driving of the other mechanical arm, so that the flanging tool can be simply transformed on the original flanging machine to realize flanging of the small pipe shell, and the manufacturing cost is effectively saved.

As shown in fig. 1-7. The utility model provides a shell and tube constant-diameter flanging die of a flanging machine, which comprises a male die 3, a female die 4 and a male die pull rod 7, wherein the female die 4 is fixed with a shell 5, and a preformed hole 051 on the shell 5 faces to the bottom of the female die 4, and is characterized in that: the male die 3 comprises a male die head 033 and a male die handle 031 arranged on the male die head 033, a cavity is arranged in the center of the male die head 033, a plurality of first convex teeth 0331 are circumferentially arranged on the inner peripheral surface of the cavity at intervals, a first groove 0332 is formed in a space between every two adjacent first convex teeth 0331, and a certain interval space is formed between the upper end surface of each first convex tooth 0331 and the upper end surface of the cavity; the male die pull rod 7 comprises a pull rod shaft 073, a plurality of second convex teeth 071 which are in sliding fit with the corresponding first concave grooves 0332 are circumferentially arranged on the peripheral surface of the upper end part of the pull rod shaft 073 at intervals, and the space between the adjacent second convex teeth 071 forms a second concave groove 072 which is in sliding fit with the corresponding first convex teeth 0331; the female die 4 comprises a female die bottom ring 041, a female die middle cylinder 042 and a female die supporting plate 043 which are sequentially connected up and down, and a through hole 0431 penetrating through the female die middle cylinder 042 and the female die bottom ring 041 is arranged on the female die supporting plate 043; the shell 5 is fixed on the female die supporting plate 043, and the male die 3 axially enters the shell 5 above the prefabricated hole 051 and then is pulled out of the prefabricated hole 051 by the male die pull rod 7 radially entering from the female die 4 to turn over the prefabricated hole.

Specifically, the cavity in the male die 033 is a circular cavity, the circular cavity penetrates through the centers of the upper end face and the lower end face of the male die 033, 4 first teeth 0331 are arranged on the inner periphery of the circular cavity in an equidistant array, the first racks 0331 are annular convex strips extending inwards from the inner peripheral surface of the cavity, and a virtual circle formed by connecting the outer peripheral surfaces of the 4 first teeth 0331 is concentric with the cavity. The pull rod shaft 073 is a cylinder, 4 second convex teeth 071 are arranged on the outer periphery of the upper end of the pull rod shaft 073 in an equidistant array, the diameter of the outer periphery of the upper end of the pull rod shaft 073 is slightly smaller than the virtual circle formed by connecting the outer peripheral surfaces of the 4 first convex teeth 0331, the outer periphery of the upper end of the pull rod shaft 073 and the outer peripheral surfaces of the first convex teeth 0331 form interval space fit, the second convex teeth 071 are annular convex strips extending outwards from the outer peripheral surfaces of the pull rod shaft, the virtual circle formed by connecting the outer peripheral surfaces of the 4 second convex teeth 071 is concentric with the pull rod shaft 073, the virtual circle diameter formed by connecting the outer peripheral surfaces of the 4 second convex teeth 071 is slightly smaller than the diameter of the cavity of the male die head 033, the two convex teeth 071 are matched to form interval space fit, and the height of the second convex teeth 071 is smaller than the interval space height in the male die head 033. When the male die pull rod 7 is matched with the male die 3, the second convex teeth 071 are respectively embedded into the first grooves 0332 and axially slide along the first grooves, and the second grooves 072 are respectively embedded into the first convex teeth 0331 and axially slide along the first convex teeth to realize the axial sliding of the male die pull rod 7 in the male die 3.

As a preferred embodiment, the first teeth 0331, the second teeth 071, the first grooves 0332 and the second grooves 072 are not limited to the above annular structures, the first teeth 0331 and the second teeth 071 may also be convex strips with triangular cross sections, and the first grooves 0332 and the second grooves 072 are grooves with triangular structures matching the second teeth 071 and the first teeth 0331, respectively.

The female die 4 comprises a female die bottom ring 041 with an annular structure, a female die middle cylinder 042 on the female die bottom ring 041 is of a cylindrical cavity structure, a female die supporting plate 043 is of a semicircular plate, the female die bottom ring 041, the female die middle cylinder 042 and the female die supporting plate 043 are integrally welded, and a female die positioning line for placing a tube shell 5 is arranged on the female die supporting plate 043 to ensure that the tube shell 5 is aligned with the semicircular plate of the female die supporting plate 043.

Further, the male die pull rod 7 extends into the cavity to rotate so that the second convex teeth 071 are embedded in the interval space at the upper end of the first convex teeth 0331 to be meshed with the first convex teeth 0331.

In order to ensure that the punch pull rod 7 pulls the punch out of the punch 3, the first teeth 0331 extend axially upward from the bottom of the punch head 033 to a height slightly higher than half the height of the punch head so that the upper surfaces of the first teeth and the upper surface of the punch head form the spacing space. When the punch pull rod 7 moves axially along the punch cavity into the spacing space, the punch pull rod 7 can be rotated at this time to enable the second convex teeth 071 and the first convex teeth 0331 to be staggered up and down to achieve engagement, and the second convex teeth 071 are located at the upper ends of the first convex teeth 0331 to pull the punch 3 out of the tube shell 5.

Further, the upper surface of the female die supporting plate 043 is an arc-shaped surface matched with the periphery of the tube shell 5, and the through holes 0431 penetrate through the arc-shaped surface. The arc surface is matched with the periphery of the tube shell 5, so that the tube shell can be better fixed, and the die movement of the male die 3 is prevented from affecting the flanging of the prefabricated hole when the tube shell 5 is pulled out.

Further, the lower end of the protruding die 033 is a conical surface body, the upper end is a cylinder, the upper end and the lower end are of an integrated structure, and the cavity is arranged to penetrate through the upper end and the lower end of the protruding die 033. The male die 033 has a male cap of T-shaped configuration at the upper end of the male die shank 031. The convex die head 033 of the conical surface body enables the convex die 3 to be convenient for flanging and forming of the prefabricated hole when being pulled out from the prefabricated hole 051, and the conical surface body can uniformly stretch the prefabricated hole to enable the prefabricated hole to be flanged. The convex cover of the T-shaped structure is convenient for the male die 3 to be matched with the tool in a plugging manner, so that the male die is output into the tube shell 5, and the tool is convenient for withdrawing from the tube shell.

Further, the male die handle 031 and the male die head 033 are connected and fixed together by a screw 032. The male die handle 031 and the male die head 033 are connected in a detachable mode, assembly is convenient to achieve after machining, manufacturing cost of a male die is reduced, meanwhile, different male die heads 033 can be matched with the male die handle 031 to achieve feeding into the pipe shell 5, component exchange rate is improved, and manufacturing cost is saved.

As shown in fig. 8. The utility model also provides a tube shell equal-diameter flanging tool of the flanging machine, which comprises the tube shell radial hole flanging die and further comprises a conveying rod 2, wherein a convex cover 031 of a male die 3 is inserted into one end part of the conveying rod 2, the other end of the conveying rod 2 is inserted into a mechanical arm 1 of the flanging machine and is in sliding connection with the mechanical arm 1, a female die 4 is fixed on a chassis 6 of the flanging machine, the mechanical arm 1 axially moves to convey the male die 3 into the tube shell 5, and a male die pull rod 7 passes through the chassis 6 to the male die 3 to pull out the male die from the prefabricated hole 051.

Specifically, one end of the conveying rod 2 is inserted in the mechanical arm 1, the outer end of the conveying rod 2 is provided with the U-shaped socket 022, the conveying rod 2 is inserted in the mechanical arm 1 and can stretch out and draw back along the mechanical arm 1 to adjust and fix the extending distance of the male die 3, and the male die 3 is movably inserted at the end part of the conveying rod 2 so as to be convenient to separate from the conveying rod. The base is connected below the female die 4 and is perpendicular to the extension square of the mechanical arm, the base is fixed on one side opposite to the mechanical arm 1, and the male die is output into the tube shell 5 at the upper end of the base through axial movement of the mechanical arm 1.

Further, a U-shaped socket 022 is provided at one end of the conveying rod 2, and the protruding cover 031 is inserted into the U-shaped socket 022; the other end of the conveying rod 2 is provided with a positioning groove 021, the positioning groove 021 is axially arranged along the periphery of the conveying rod, and the mechanical arm 1 is provided with a positioning pin 011 inserted into the positioning groove 021. The conveying rod 2 comprises a rod body 023, the outer end of the rod body 023 is provided with the U-shaped socket 022, the outer peripheral surface of the other end of the rod body 023 is provided with a positioning groove 021, and the positioning groove 021 penetrates through the edge part of the rod body from the inner end extending into the mechanical arm to the U-shaped socket end. The convex cover 031 of the male die 3 is in a T-shaped structure, and a U-shaped groove in the middle of the U-shaped jack 022 can be embedded into the T-shaped structure to support the male die so that the male die 3 is movably inserted and connected with the U-shaped jack 022. The outer diameter of the lower end of the convex cover is matched with the opening groove of the U-shaped jack 022 at intervals, so that the U-shaped jack 022 can conveniently withdraw from the male die 3 in the tube shell 5.

Further, a shaft hole for accommodating the male die pull rod 7 to pass through is formed in the middle of the underframe 6. The male die pull rod enters the tube shell 5 from the bottom of the underframe 6, a shaft hole on the underframe 6 and a through hole 0431 on the female die supporting plate 043 are coaxially arranged, and the inner diameter of the shaft hole is slightly larger than the outer diameter of the male die pull rod 7.

See again fig. 8. The utility model relates to a shell equal-diameter flanging die of a flanging machine and a flanging tool thereof, which specifically comprise the following operation steps:

(1) firstly, selecting a matched male die 3, a female die 4 and a male die pull rod 7 according to a flanging tube shell, and pre-installing the female die 4 on a chassis 6 of a flanging machine;

(2) the conveying rod 2 is arranged on the mechanical arm 1 of the flanging machine, the extending length of the conveying rod is adjusted at the same time, and the conveying rod 2 is fixedly positioned by a positioning pin 011 to prevent rotation;

(3) placing the pre-cut tube shell 5 on a female die supporting plate 043 of a female die 4, aligning the tube shell positioning line with the female die positioning line, and marking the tube shell positioning line and the female die positioning line on the tube shell and the female die in advance;

(4) lifting the male die 3, and clamping the male die handle 031 on the U-shaped socket 022 of the conveying rod 2;

(5) controlling the mechanical arm 1 of the flanging machine to extend out, transversely conveying the male die 3 into the tube shell 5 to be flanged according to the direction A, and aligning the lower hole cavity of the male die 3 with the prefabricated hole 051 of the tube shell 5;

(6) the male die pull rod 7 is controlled to extend upwards from the underframe 6 of the flanging machine according to the direction B, the upper end of the male die pull rod 7 passes through the female die 4 and the prefabricated hole 051 and then reaches the upper part of the cavity of the male die 3, and the male die pull rod 7 is rotated to be clamped at the upper end of the first convex tooth 0331 of the male die 3;

(7) the mechanical arm 1 is controlled to axially move to drive the conveying rod 2 to withdraw from the inside of the pipe shell 5;

(8) controlling a male die pull rod 7 to move downwards according to C to draw, and enabling a male die 3 to pass through the prefabricated hole 051 to enable the male die to be flanging and forming;

(9) taking down the tube shell 5 formed by flanging, and completing the flanging of the prefabricated hole of one tube shell, so that the circular operation can realize the flanging of the prefabricated hole of the continuous tube shell.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (8)

1. The shell equal-diameter flanging die of the flanging machine comprises a male die, a female die and a male die pull rod, wherein the female die is fixed with the shell, and a prefabricated hole on the shell faces to the bottom of the female die, and is characterized in that: the male die comprises a male die head and a male die handle arranged on the male die head, wherein a cavity is arranged in the male die head, a plurality of first convex teeth are circumferentially arranged on the inner peripheral surface of the cavity at intervals, a first groove is formed in a space between every two adjacent first convex teeth, and a certain interval space is formed between the upper end surface of each first convex tooth and the upper end surface of the cavity; the male die pull rod comprises a pull rod shaft, a plurality of second convex teeth which are in sliding fit with the corresponding first concave grooves are circumferentially arranged on the peripheral surface of the upper end part of the pull rod shaft at intervals, and second concave grooves which are in sliding fit with the corresponding first convex teeth are formed in spaces between the adjacent second convex teeth; the female die comprises a female die bottom ring, a female die middle cylinder and a female die supporting plate which are connected up and down in sequence, and a through hole penetrating through the female die middle cylinder and the female die bottom ring is formed in the female die supporting plate; the shell is fixed on the female die supporting plate, the male die axially enters the upper part of the prefabricated hole in the shell and then is pulled out of the prefabricated hole by the male die pull rod radially entering from the female die to turn over the prefabricated hole.

2. The shell and tube constant diameter flanging die of a flanging machine as claimed in claim 1, wherein the die comprises; the male die pull rod stretches into the hole cavity to rotate so that the second convex teeth are embedded in the interval space at the upper end of the first convex teeth to be meshed with the first convex teeth.

3. The shell and tube constant diameter flanging die of a flanging machine according to claim 1 or 2, wherein the shell and tube constant diameter flanging die is characterized in that; the upper surface of the female die supporting plate is an arc-shaped surface matched with the periphery of the tube shell, and the through hole penetrates through the arc-shaped surface.

4. A shell and tube constant diameter flanging die for flanging machine as claimed in claim 3, wherein; the male die handle and the male die head are connected and fixed into a whole by adopting screws.

5. The shell and tube constant diameter flanging die of the flanging machine as claimed in claim 4, wherein the shell and tube constant diameter flanging die is characterized in that; the lower end of the male die head is a conical surface body, and the upper end of the male die handle is provided with a convex cover with a T-shaped structure.

6. A shell and tube constant diameter flanging tool of a flanging machine is characterized in that: the pipe shell equal-diameter flanging die comprises any one of the above claims, and further comprises a conveying rod, wherein a convex cover of the male die is inserted into one end part of the conveying rod, the other end of the conveying rod is inserted into a mechanical arm of the flanging machine and is in sliding connection with the mechanical arm, the female die is fixed on a bottom frame of the flanging machine, the male die is conveyed into the pipe shell by axial movement of the mechanical arm, and a male die pull rod penetrates through the bottom frame to the male die to pull out the male die from the prefabricated hole.

7. The shell and tube constant diameter flanging tool of the flanging machine according to claim 6, wherein: one end of the conveying rod is provided with a U-shaped socket, and the convex cover is inserted into the U-shaped socket; the other end of the conveying rod is provided with a positioning groove, the positioning groove is axially formed along the periphery of the conveying rod, and the mechanical arm is provided with a positioning pin inserted into the positioning groove.

8. The shell and tube constant diameter flanging tool of the flanging machine according to claim 7, wherein: the middle part of the underframe is provided with a shaft hole for accommodating the male die pull rod to pass through.

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