CN220837589U - Feeding mechanism, guiding device and expansion and contraction equipment - Google Patents

Abstract

The utility model belongs to the technical field of machining, and particularly discloses a feeding mechanism, a guiding device and a necking device. According to the feeding mechanism, the metal pipes in the storage unit are led out step by step through the first lifting unit, the second lifting unit and the movable cover, so that the technical problems of high operation risk and low production efficiency caused by low automation degree of metal pipe processing in the prior art are solved.

Description

Feeding mechanism, guiding device and expansion and contraction equipment

Technical Field

The utility model belongs to the technical field of machining, and particularly relates to a feeding mechanism, a guiding device and a necking device.

Background

In order to facilitate the welding of the piping in the pipeline through which the medium flows, the port of the pipe fitting needs to be flared or necked. At present, in the processing process of metal pipes in a pipeline workshop, a metal pipe with a certain length is manually taken first, the metal pipe is placed in a clamp and is jacked to a point position, then a pedal control switch is used for controlling a mold to be closed and the end part of the metal pipe is molded, and the molded metal pipe is manually taken down and placed in a finished product box, so that the processing of the metal pipe can be completed. Because the degree of automation of the processing of the metal pipe is lower, the labor intensity of constructors is increased along with the increase of the processing amount of the metal pipe, the operation risk is increased and the production efficiency is reduced.

Disclosure of utility model

In view of the above, the utility model provides a feeding mechanism, a guiding device and a necking device, which are used for guiding out a metal pipe in a storage unit step by step through a first lifting unit, a second lifting unit and a movable cover, so that the technical problems of high operation risk and low production efficiency caused by low automation degree of metal pipe processing in the prior art are solved.

In order to solve the above-described problems, according to an aspect of the present utility model, there is provided a feeding mechanism including:

The storage unit is internally provided with a cavity for placing the metal pipe;

the first lifting unit is movably arranged in the cavity and is used for guiding the metal pipe in the cavity to the outlet of the cavity;

the second lifting unit is movably arranged at the outlet of the cavity and is used for guiding out the metal pipe at the outlet of the cavity;

The movable cover is movably arranged at the outlet of the cavity, is positioned at the top of the second lifting unit and is used for controlling the width of the outlet of the cavity.

In some embodiments, the storage unit comprises a storage bin, the bottom of which is provided with a first protruding structure and a second protruding structure;

The first lifting unit is located at one side of the first protruding structure, and the second lifting unit is located between the first protruding structure and the second protruding structure.

In some embodiments, the top of the first lifting unit and/or the second lifting unit is a bevel, the lower side of the bevel facing the outlet of the chamber.

In some embodiments, the storage unit further comprises an adjustment module adjustably disposed within the chamber for adjusting the length of the chamber.

In some embodiments, the adjustment module includes a guide disposed within the chamber along a length of the chamber and a slider slidably coupled to the guide.

In some embodiments, the movable cover is disposed along a width direction of the chamber, the movable cover is in a V-shaped structure, and the movable cover is rotatably disposed on top of the second lifting unit and the second protrusion structure.

In order to solve the above problems, according to another aspect of the present utility model, there is provided a guide device including the feeding mechanism described above.

In some embodiments, the guiding device further comprises a supporting seat, a guide rail and a pushing piece, wherein the guide rail is arranged on the supporting seat, the guide rail is arranged close to the cavity opening of the feeding mechanism, and the pushing piece is arranged on the guide rail in a sliding manner and used for guiding the metal tube on the guide rail to a specified position.

In some embodiments, the guide rail is provided with a groove towards the chamber outlet, the groove being of V-shaped or U-shaped configuration.

In some embodiments, the guiding device further comprises a guiding member, wherein the guiding member is of a V-shaped or U-shaped structure, one end of the guiding member is located in the guide rail, and the other end of the guiding member is hinged to one side of the guide rail away from the outlet of the chamber, and is used for guiding out the metal tube in the guide rail.

In some embodiments, the support base is movably disposed at the outlet of the chamber along the first direction, the second direction, and the third direction.

In order to solve the above problems, according to another aspect of the present utility model, there is provided a necking apparatus including a necking machine and the above-mentioned guiding device, the necking machine being disposed at one side of the guiding device.

Compared with the prior art, the feeding mechanism has at least the following beneficial effects:

The feeding mechanism comprises a storage unit, a first lifting unit, a second lifting unit and a movable cover, wherein the first lifting unit is movably arranged in a cavity of the storage unit to guide a metal pipe in the cavity to an outlet of the cavity, the second lifting unit is movably arranged at the outlet of the cavity to guide out the metal pipe at the outlet of the cavity, the movable cover is movably arranged at the outlet of the cavity to open or close the cavity, and the movable cover is positioned at the top of the second lifting unit to guide out the metal pipe between the second lifting unit and the movable cover. In the guiding process, the first lifting unit can guide the metal pipe at the bottom of the cavity to the position near the outlet of the cavity, the second lifting unit guides the metal pipe near the outlet of the cavity to the position of the outlet, and the width of the outlet of the cavity is controlled along with the movement of the movable cover, so that the guiding quantity of the metal pipe is regulated. Compared with feeding in a manual or semi-automatic processing mode in the prior art, the feeding mechanism provided by the utility model has the advantages that the metal pipes in the storage unit are led out step by step through the first lifting unit, the second lifting unit and the movable cover, and the technical problems of high operation risk and low production efficiency caused by low automation degree of metal pipe processing in the prior art are solved.

The guiding device provided by the utility model is designed based on the structure of the feeding mechanism, so that the beneficial effects of the guiding device are all those of the feeding mechanism, and are not described in detail herein.

The expansion and contraction device provided by the utility model is designed based on the guide device, so that the beneficial effects of the expansion and contraction device are all those of the guide device, and are not described in detail herein.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic overall structure of a feeding mechanism according to a first view angle provided by an embodiment of the present utility model;

Fig. 2 is a schematic overall structure of a second view angle of the feeding mechanism according to the embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a feeding mechanism according to an embodiment of the present utility model;

Fig. 4 is an enlarged view of the structure of fig. 3 at a;

fig. 5 is a schematic diagram of the overall structure of a guiding device according to an embodiment of the present utility model;

fig. 6 is an enlarged view of the structure of fig. 5 at B;

FIG. 7 is a schematic cross-sectional view of a guiding device according to an embodiment of the present utility model;

Fig. 8 is an enlarged view of the structure of fig. 7 at C.

Wherein: 1. a storage unit; 11. a chamber; 12. a storage bin; 121. a first bump structure; 122. a second bump structure; 13. an adjustment module; 131. a guide member; 132. a slider; 2. a first lifting unit; 3. a second lifting unit; 4. a movable cover; 5. a support base; 6. a guide rail; 7. a pushing member; 8. and a lead-out member.

Detailed Description

In order to further describe the technical means and effects adopted for achieving the preset aim of the utility model, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the utility model with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

In the description of the present utility model, it should be clear that the terms "first," "second," and the like in the description and claims of the present utility model and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order; the terms "vertical," "transverse," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "horizontal," and the like are used for indicating an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description of the present utility model, and do not mean that the apparatus or element referred to must have a specific orientation or position, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The embodiment of the utility model provides a feeding mechanism which is used on a guiding device and a necking device, and the feeding mechanism is described in detail below with reference to specific embodiments.

Example 1

The embodiment of the utility model provides a feeding mechanism, referring to fig. 1 to 4, the feeding mechanism comprises a storage unit 1, a first lifting unit 2, a second lifting unit 3 and a movable cover 4, wherein a cavity 11 for placing a metal pipe is arranged in the storage unit 1, the first lifting unit 2 is movably arranged in the cavity 11 and used for guiding the metal pipe in the cavity 11 to the outlet of the cavity 11, the second lifting unit 3 is movably arranged at the outlet of the cavity 11 and used for guiding out the metal pipe at the outlet of the cavity 11, the movable cover 4 is movably arranged at the outlet of the cavity 11, and the movable cover 4 is positioned at the top of the second lifting unit 3 and used for controlling the width of the outlet of the cavity 11.

Specifically, feeding mechanism includes storage unit 1, first elevating unit 2, second elevating unit 3 and movable cover 4, first elevating unit 2 activity sets up in the cavity 11 of storage unit 1 in order to lead the tubular metal resonator in the cavity 11 to the exit of cavity 11, second elevating unit 3 activity sets up in the exit of cavity 11 and is used for deriving the tubular metal resonator of cavity 11 exit, movable cover 4 activity sets up in the exit of cavity 11 and is used for opening or closing the cavity, movable cover 4 is located the top of second elevating unit 3 in order to derive the tubular metal resonator between second elevating unit 3 and movable cover 4. In the guiding process, the first lifting unit 2 can guide the metal pipe at the bottom of the chamber 11 to the vicinity of the outlet of the chamber 11, the second lifting unit 3 guides the metal pipe at the vicinity of the outlet of the chamber 11 to the outlet, and the change of the width of the outlet of the chamber 11 is controlled along with the movement of the movable cover 4, so that the guiding quantity of the metal pipe is regulated. Compared with feeding by manual or semi-automatic processing in the prior art, the feeding mechanism provided by the embodiment of the utility model leads out the metal pipe in the storage unit 1 step by step through the first lifting unit 2, the second lifting unit 3 and the movable cover 4, and solves the technical problems of high operation risk and low production efficiency caused by low automation degree of metal pipe processing in the prior art.

In a specific embodiment, referring to fig. 3 and 4, the outlet of the chamber 11 is located at the top of the storage unit 1;

The first lifting unit 2 and the second lifting unit 3 are slidably connected with the storage unit 1 along the height direction of the chamber 11.

Specifically, the top in this embodiment refers to a position of the upper side of the chamber 11, or the top surface of the chamber 11, and in order to ensure that the guiding position of the metal pipe is controllable, it is preferable that the outlet of the chamber 11 is located at a position of the upper side of the chamber 11 (as shown in fig. 3 and 4). The bottom of the chamber 11 may be a planar structure or a beveled structure, which facilitates guiding of the metal tube when the bottom of the chamber 11 is beveled.

When the number of metal tubes stored in the chamber 11 is large, the metal tubes are easily in a non-parallel state, so that the outlet of the chamber 11 is easily blocked, and at this time, the first lifting unit 2 lifts part of the metal tubes to disperse the metal tubes, thereby improving the guiding efficiency. In addition, the first lifting unit 2 can lift each metal tube to the second lifting unit 3 relatively accurately so as to guide each metal tube relatively accurately, thereby improving the conduction efficiency. It should be noted that, the bottom of the chamber 11 may be a plane or an inclined plane, and in order to ensure that the metal tube on the side of the chamber 11 away from the first lifting unit 2 can be moved to the position of the first lifting unit 2, preferably, the bottom of the chamber 11 has an inclined plane structure inclined toward the side of the first lifting unit 2 (as shown in fig. 1 to 3).

The second lifting unit 3 serves to further lift the nearby metal tube between its top and the movable cover 4, so that the metal tube is removed from the outlet of the chamber 11 by its own weight when the movable cover 4 is opened. It should be noted that, the first lifting unit 2 may guide at least two metal tubes to the second lifting unit 3, and the second lifting unit 3 may guide at least one metal tube between the top of the metal tube and the movable cover 4, so as to further control the metal tubes to be led out from the outlet of the chamber 11 one by adjusting the opening of the movable cover 4, so as to reduce the lifting times of the first lifting unit 2; the first lifting unit 2 may also guide one metal tube to the second lifting unit 3, which second lifting unit 3 guides the metal tube out of the outlet of the chamber 11, to prevent the occurrence of two metal tubes or a plurality of metal tubes falling from the chamber 11.

In a specific embodiment, referring to fig. 2 to 4, the storage unit 1 includes a storage bin 12, and a first protrusion structure 121 and a second protrusion structure 122 are provided at the bottom of the storage bin 12;

The first elevating unit 2 is located at one side of the first protrusion structure 121, and the second elevating unit 3 is located between the first protrusion structure 121 and the second protrusion structure 122.

Specifically, the first protrusion structure 121 is used for guiding the first lifting unit 2 during lifting of the first lifting unit 2, and similarly, the second protrusion structure 122 is used for guiding the third lifting unit 3 during lifting of the second lifting unit 3, and furthermore, the first lifting unit 2 and the second lifting unit 3 form a channel to store metal pipes, and the stored metal pipes can guide the metal pipes in the channel one by one to the outside of the chamber 11 during lifting of the second lifting unit 3. In order to improve the guiding effect, the width of the space between the first lifting unit 2 and the second lifting unit 3 is smaller than twice the diameter of the metal pipe. Compared with the prior art, the first lifting unit 2 and the second lifting unit 3 store and guide the metal pipe step by step so as to ensure the stability of guiding work of the metal pipe.

In addition, when the width of the top of the first bump structure 121 is wider, the top surface of the first bump structure 121 may be set to a slope structure, and the slope structure may be located at a side closer to the first elevation unit 2 and the slope structure may be located at a side closer to the second elevation unit 3, so as to prevent the metal tube from stagnating at the top of the first bump structure 121. Similarly, the shape of the second protruding mechanism 122 may be adaptively adjusted with reference to the top shape of the first protruding structure 121, which is not described herein.

In a specific embodiment, with continued reference to fig. 2 to 4, the top of the first lifting unit 2 and/or the second lifting unit 3 is beveled, the lower side of the bevel being directed towards the outlet of the chamber 11.

Specifically, the top surface of the first lifting unit 2 is lower near one side of the first protrusion structure 121, and the top of the first lifting unit 2 is of a slope structure, so that the metal tube can be guided, and the metal tube can more easily roll to the second lifting unit 3. In addition, the inclined surface at the top of the first lifting unit 2 and the side wall of the first protruding structure 121 form a groove which can have a certain limit effect on the metal tube, so as to prevent the metal tube from falling off from the first lifting unit 2 in the guiding process.

The top surface of the second lifting unit 3 is close to the bottom of one side of the second protruding structure 122, and the top surface of the second lifting unit 3 is of an inclined surface structure, so that the metal tube can be guided, and the metal tube can roll to the outlet of the chamber 11 more easily.

It should be noted that, the top portions of the first lifting unit 2 and the second lifting unit 3 may be both in a slope structure (as shown in fig. 2 to 4), or only the top portion of the first lifting unit 2 is in a slope structure (not shown), or only the top portion of the second lifting unit 3 is in a slope structure (not shown).

In a specific embodiment, referring to fig. 1 and 2, the storage unit 1 further comprises an adjustment module 13, the adjustment module 13 being adjustably arranged in the chamber 11 for adjusting the length of the chamber 11.

Specifically, the adjusting module 13 is slidably arranged in the chamber 11 along the length direction of the chamber 11, so that the length of the chamber 11 is adjusted, and then the chamber 11 can store metal pipes with different lengths, so that the metal pipes can be completely poured into the chamber 11 at one time in the loading and unloading processes of the metal pipes, and the construction strength is reduced.

In a specific embodiment, with continued reference to fig. 1 and 2, the adjustment module 13 includes a guide member 131 and a slide member 132, the guide member 131 being disposed within the chamber 11 along the length of the chamber 11, the slide member 132 being slidably coupled to the guide member 131.

Specifically, the guide member 131 is disposed in the chamber 11 in the longitudinal direction so that the sliding member 132 can move in the longitudinal direction of the chamber 11 to thereby normalize the metal pipe. The guide 131 may be a guide rail (not shown) or a guide bar (as shown in fig. 1 and 2), and when the guide 131 is a guide bar, one, two or more guide bars may be provided, and the more guide bars are provided, the more stable the guide of the slider 132 is. The guide bar is spaced from the bottom of the chamber 11 to prevent the guide bar from blocking the movement of the metal tube. The plate-like structure of the slider 132 has a shape that matches the cross-sectional shape of the chamber 11 in the width direction thereof.

In a specific embodiment, referring to fig. 1 to 4, the movable cover 4 is disposed along the width direction of the chamber 11, the movable cover 4 has a V-shaped structure, and the movable cover 4 is rotatably disposed on top of the second elevating unit 3 and the second protrusion structure 122.

Specifically, the movable cover 4 includes a first state and a second state, when the movable cover 4 is in the first state, one end of the movable cover 4 is spaced from the first protruding structure 121, and the other end of the movable cover 4 abuts against the second protruding structure 122, and at this time, the outlet of the chamber 11 is in a closed state; when the movable cover 4 is in the second state, one end of the movable cover is abutted to the first protruding structure or arranged at intervals, and the other end of the movable cover 4 is arranged at intervals with the second protruding structure 122, so that the outlet of the chamber 11 is in an open state.

The movable cover 4 is rotatably disposed on the top of the second lifting unit 3 and the second protrusion structure 122 to open and close the outlet of the chamber 11, and in addition, the rotation angle of the movable cover can adjust the width of the opening of the chamber 11 to allow the metal pipes with different pipe diameters to pass through. For example, a rotating shaft may be disposed at the top of the second lifting unit 3, one end of the movable cover 4 is fixed on the rotating shaft, and one end of the rotating shaft is connected to a motor, and the motor drives the rotating shaft to rotate, so as to drive the movable cover 4 to rotate (as shown in fig. 1 to 4).

The movable cover 4 has a V-shaped structure, so that the stability of the structure of the movable cover 4 can be improved, and on the other hand, other components can be placed on the movable cover with the V-shaped structure and fall into the movable cover from the outlet of the cavity 11.

Example 2

An embodiment of the present utility model provides a guide apparatus, as shown in fig. 5 to 8, which includes the feeding mechanism of embodiment 1.

Specifically, the guiding device is used for conveying the stored metal tube to the designated position, and the guiding device provided by the embodiment of the utility model is designed based on the feeding mechanism of embodiment 1, so that the beneficial effects of the guiding device refer to the beneficial effects of the whole feeding mechanism of embodiment 1, and are not described in detail herein.

In a specific embodiment, the guiding device further comprises a supporting seat 5, a guide rail 6, a pushing piece 7 and the feeding mechanism of embodiment 1, wherein the guide rail 6 is arranged on the supporting seat 5, the guide rail 6 is arranged close to a cavity 11 of the feeding mechanism, and the pushing piece 7 is slidably arranged on the guide rail 6 and used for guiding the metal tube on the guide rail 6 to a specified position.

Specifically, the guide rail 6 is provided on the support base 5 for receiving and guiding the metal tube dropped from the feeding mechanism, and the pushing member 7 is slidably provided on the guide rail 6 in the length direction of the guide rail 6 for moving the metal tube on the guide rail 6 to a specified position. The guide rail 6 is located at the outlet of the feeding mechanism, and the length of the guide rail 6 is equal to or greater than the length of the outlet of the chamber 11.

In a specific embodiment, referring to fig. 7 and 8, the guide rail 6 is provided with a groove towards the outlet of the chamber 11, and the groove has a V-shaped or U-shaped structure.

Specifically, the groove can be used for clamping the metal pipe so that the metal pipe is not easy to slide in the moving process, the groove is arranged to be of a V-shaped or U-shaped structure, the metal pipe can be positioned in the width direction of the groove, and further processing of the metal pipe is facilitated.

In a specific embodiment, the guiding device further comprises a guiding piece 8, wherein the guiding piece 8 is of a V-shaped or U-shaped structure, one end of the guiding piece 8 is located in the guide rail 6, and the other end of the guiding piece 8 is hinged to one side, far away from an outlet of the cavity 11, of the guide rail 6 and used for guiding out the metal tube in the guide rail 6.

Specifically, the guiding-out part 8 can guide out the metal tube from the groove, the guiding-out part 8 moves out the metal tube from the groove in the process of rotating along the width direction of the groove, and the guiding-out part 8 is arranged into a V-shaped structure or a U-shaped structure and is used for preventing the metal tube from falling off from the guiding-out part 8 in the guiding-out process. In order to prevent the guide 8 from damaging the end of the metal tube during its movement along its axis, a groove (not shown) for placing the guide 8 may be provided on the guide rail 6. In a specific embodiment, referring to fig. 5 and 7, the support seat 5 is movably disposed at the outlet of the chamber 11 along the first direction, the second direction and the third direction.

Specifically, due to the different diameters of the metal tubes, the relative positions of the outlet of the chamber 11 and the guide rail 6 also need to be further adjusted to ensure the guiding precision, and the supporting seat 5 can be movably arranged along three directions to adjust the outlet position of the guide rail 6 relative to the chamber 11. For example (as shown in fig. 7), the supporting seat 5 may be a liftable structure to implement adjustment in the first direction, a bottom plate may be disposed at the bottom of the supporting seat 5, a track may be disposed at the bottom of the bottom plate to implement adjustment in the second direction, and a guide rail may be disposed between the supporting seat 5 and the bottom plate to implement adjustment in the third direction.

Example 3

An embodiment of the present utility model provides a necking apparatus (not shown in the drawings), which includes a necking machine and the guide device of embodiment 2, where the necking machine is disposed on one side of the guide device.

The device for expanding and shrinking the mouth provided by the embodiment of the utility model is designed based on the guiding device of the embodiment 2, so that the beneficial effects of the device for expanding and shrinking the mouth refer to all the beneficial effects of the guiding device of the embodiment 2, and are not described in detail herein.

In summary, it is easily understood by those skilled in the art that the above-mentioned advantageous features can be freely combined and overlapped without conflict.

The above is only a preferred embodiment of the present utility model, and the present utility model is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiment according to the technical substance of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims (10)

1. A feed mechanism, comprising:

the storage unit is internally provided with a cavity for placing the metal pipe;

The first lifting unit is movably arranged in the cavity and used for guiding the metal pipe in the cavity to the outlet of the cavity;

The second lifting unit is movably arranged at the outlet of the cavity and used for guiding out the metal pipe at the outlet of the cavity;

The movable cover is movably arranged at the outlet of the cavity, and is positioned at the top of the second lifting unit and used for controlling the width of the outlet of the cavity.

2. The feeding mechanism of claim 1, wherein the storage unit comprises a storage bin, and a first protruding structure and a second protruding structure are arranged at the bottom of the storage bin;

the first lifting unit is located on one side of the first protruding structure, and the second lifting unit is located between the first protruding structure and the second protruding structure.

3. The feeding mechanism according to claim 2, wherein the top of the first lifting unit and/or the second lifting unit is a bevel, the lower side of the bevel being directed towards the outlet of the chamber.

4. The feed mechanism of claim 2, wherein the storage unit further comprises an adjustment module adjustably disposed within the chamber for adjusting a length of the chamber.

5. The feed mechanism of claim 4, wherein the adjustment module comprises a guide member disposed within the chamber along a length of the chamber and a slider member slidably coupled to the guide member.

6. The feeding mechanism according to claim 5, wherein the movable cover is disposed along a width direction of the chamber, the movable cover has a V-shaped structure, and the movable cover is rotatably disposed on top of the second lifting unit and the second protrusion structure.

7. A guiding device, characterized in that the guiding device comprises a supporting seat, a guide rail, a pushing piece and the feeding mechanism of any one of claims 1 to 6, wherein the guide rail is arranged on the supporting seat, the guide rail is arranged close to the cavity opening of the feeding mechanism, and the pushing piece is arranged on the guide rail in a sliding way and used for guiding a metal pipe on the guide rail to a specified position;

The supporting seat is movably arranged at the outlet of the cavity along the first direction, the second direction and the third direction.

8. The guide device according to claim 7, wherein the guide rail is provided with a groove towards the chamber outlet, the groove being of V-shaped or U-shaped configuration.

9. The guide device according to claim 7, further comprising a guiding member having a V-shaped or U-shaped structure, one end of the guiding member being located in the guide rail, and the other end of the guiding member being hinged to a side of the guide rail remote from the chamber outlet for guiding out the metal tube in the guide rail.

10. A necking apparatus, comprising a necking machine and the guide device of any of claims 7 to 9, the necking machine being disposed on one side of the guide device.